1. A resin water filtering device is characterized by comprising a pretreatment mechanism, a reverse osmosis mechanism, a resin filtering mechanism and a post-treatment mechanism which are sequentially connected by pipelines; the pipeline is provided with a plurality of valves for controlling the on-off and/or flow of the pipeline; the resin filtering mechanism comprises a shell, and a female resin filter element and a male resin filter element which are arranged in the shell; the negative resin filter element is communicated with the positive resin filter element, and both the negative resin filter element and the positive resin filter element are communicated with a pipeline; the ratio of the cation resin to the anion resin in the resin filtering mechanism is adjusted to enable the effluent water to be acidic or alkaline, and after the acidic and alkaline water enters the pipeline, scale in the pipeline and the valve is cleaned.

2. The resin water filtering device according to claim 1, wherein the pretreatment mechanism comprises a tap water input end, a PP/scale inhibition activated carbon filtering component, a first electromagnetic valve, a pressure reducing valve and a diaphragm pump which are sequentially connected in series through a pipeline; the diaphragm pump is connected with the reverse osmosis mechanism in series; the post-treatment mechanism comprises a UF/active carbon filtering component, an ultraviolet disinfection component and a purified water output end which are sequentially connected in series through pipelines; the UF/active carbon filter component is communicated with a pure water output end of the reverse osmosis mechanism through a pipeline, and/or the UF/active carbon filter component is communicated with the resin filter mechanism through a pipeline.

3. The resin water filtration device of claim 2, further comprising three TDS water quality detectors; the first TDS water quality detector is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and used for detecting the water quality of a tap water input end; the second TDS water quality detector is arranged on a pipeline between the resin filtering mechanism and the UF/active carbon filtering component and is used for detecting the water quality of the effluent water flow treated by the resin filtering mechanism; the third TDS water quality detector is arranged on a pipeline between the UF/active carbon filtering component and the ultraviolet disinfection component and used for detecting the water quality of the water flow at the purified water output end.

4. The resin water filtering device according to claim 3, further comprising two flow sensors; the first flow sensor is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and used for detecting the flow flowing into the diaphragm pump; and the second flow sensor is arranged on a pipeline between the UF/active carbon filtering component and the ultraviolet disinfection component and is used for detecting the flow of the purified water output end.

5. The resin water filtering device according to claim 4, further comprising two temperature sensors; the first temperature sensor is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and used for detecting the temperature of water flow flowing into the diaphragm pump; the second temperature sensor is mounted on the housing of the resin filter mechanism and used for detecting the temperature of the resin filter mechanism.

6. The resin water filtering device according to claim 5, wherein the concentrate output end of the reverse osmosis mechanism is communicated with a waste water discharge end through a regenerated water pipeline; a fifth electromagnetic valve and a second electromagnetic valve are sequentially arranged on the regeneration water pipeline and used for controlling the on-off of the pipeline; a reclaimed water pipeline between the fifth electromagnetic valve and the second electromagnetic valve is communicated with the resin filtering mechanism through an acidic water pipeline provided with a sixth electromagnetic valve; and a first three-way valve is further installed on the regeneration water pipeline between the fifth electromagnetic valve and the second electromagnetic valve, the port a and the port b of the first three-way valve are connected into the regeneration water pipeline, and the port c is communicated with the negative resin filter element or the positive resin filter element through a pipeline.

7. The resin water filtering device according to claim 6, wherein the concentrated water output end of the reverse osmosis mechanism is communicated with the female resin filter element or the male resin filter element through a pipeline; the input end of the UF/active carbon filtering component is sequentially connected with a first one-way valve, a third electromagnetic valve and a negative resin filter element or a positive resin filter element of the resin filtering mechanism in series through a pipeline; the direction of the first one-way valve is from the resin filtering mechanism to the UF/active carbon filtering component; the reverse osmosis mechanism is different from the resin filter element communicated with the UF/active carbon filter component.

8. The resin water filtering device according to claim 7, wherein a second three-way valve is arranged on a pipeline between the pure water output end of the reverse osmosis mechanism and the input end of the UF/active carbon filtering component, the port a and the port b of the second three-way valve are respectively communicated with the pure water output end of the reverse osmosis mechanism and the input end of the UF/active carbon filtering component through pipelines, the port c is communicated with an ultrafiltration backwashing pipeline, and the other end of the ultrafiltration backwashing pipeline is communicated with a pipeline between the output end of the UF/active carbon filtering component and the ultraviolet disinfection component.

9. The resin water filtering device according to claim 8, wherein the pipeline between the UF/active carbon filtering component and the second three-way valve is communicated with a regenerated water pipeline through a parallel pipeline; a fourth electromagnetic valve and a second one-way valve are sequentially connected in series on the parallel pipeline; the fourth electromagnetic valve is used for controlling the on-off of the parallel pipelines; the second check valve is in a direction from the second three-way valve to the second solenoid valve.

10. A rinsing method, characterized by being applied to the resin drainage device of claim 9, the method comprising the steps of:

s1: flushing the reverse osmosis mechanism;

opening ports a and b of a first electromagnetic valve, a second electromagnetic valve, a fifth electromagnetic valve and a second three-way valve; closing the third electromagnetic valve, the fourth electromagnetic valve and the sixth electromagnetic valve;

starting the diaphragm pump, wherein tap water flows into the reverse osmosis mechanism from the tap water input end through the PP/scale-inhibiting activated carbon filter component, the first electromagnetic valve, the pressure reducing valve and the diaphragm pump in sequence for flushing;

the water flow filtered by the reverse osmosis mechanism is divided into two parts to be discharged: the concentrated water filtered by the reverse osmosis mechanism flows through the regeneration water pipeline and the second electromagnetic valve in sequence from the concentrated water output end and is finally discharged from the waste water discharge end; the pure water filtered by the reverse osmosis mechanism flows through a second three-way valve, a UF/active carbon filtering component and an ultraviolet disinfection component from a pure water output end and is finally discharged from a purified water output end;

continuously washing for 10-20 min;

s2: flushing the resin filtration mechanism;

after the step S1 is completed, the third electromagnetic valve is opened; closing the second solenoid valve and the fifth solenoid valve;

starting the diaphragm pump, wherein tap water flows through the PP/scale inhibition activated carbon filter component, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump and the reverse osmosis mechanism from the tap water input end in sequence;

the water flow filtered by the reverse osmosis mechanism is divided into two parts to be discharged: concentrated water filtered by the reverse osmosis mechanism flows through a positive resin filter element in the resin filtering mechanism, a negative resin filter element in the resin filtering mechanism, a third electromagnetic valve, a first one-way valve, a UF/active carbon filtering component and an ultraviolet disinfection component in sequence from a concentrated water output end, and is finally discharged from a purified water output end; the pure water filtered by the reverse osmosis mechanism flows through a second three-way valve, a UF/active carbon filtering component and an ultraviolet disinfection component from a pure water output end and is finally discharged from a purified water output end;

and continuously washing for 2-8 min.

Background

Resin water filtration devices are also known as softened water devices, water softeners, water softening equipment, and water softeners. The cation resin is adopted to soften source water, calcium and magnesium ions (main components forming scale) in the water are adsorbed by the cation resin, the hardness of the source water is reduced, the water can be purified by heterogeneous resin (cation and anion resin), and the resin can be regenerated and recycled.

The resin water filtering device is provided with a plurality of valves for controlling the on-off of the pipeline and the flow velocity of water flow. In the process of using the resin water filtering device for a long time, the water scale is easily accumulated in the valve to reduce the flow rate and even block the valve, and the service life of the valve is further shortened. The valve is required to be detached after being cleaned every time, and is reinstalled after being cleaned, so that the problems of reduced sealing performance and leakage of the connecting end of the valve are easily caused while the operation is complicated.

Disclosure of Invention

The invention aims to make the water flow treated by the negative resin filter element and/or the positive resin filter element acidic, alkaline or neutral by adjusting the change of the resin performance proportion. And then by controlling the on-off of each valve, the acidic or alkaline water flow sequentially flows through each valve to perform a displacement reaction with the scale accumulated in the valve, thereby cleaning the scale. The acid or alkaline water generated in the device is used for cleaning the scale, and the valve does not need to be disassembled.

The invention is realized by the following technical scheme:

a resin water filtering device comprises a pretreatment mechanism, a reverse osmosis mechanism, a resin filtering mechanism and a post-treatment mechanism which are sequentially connected by pipelines; the pipeline is provided with a plurality of valves for controlling the on-off and/or flow of the pipeline; the resin filtering mechanism comprises a shell, and a female resin filter element and a male resin filter element which are arranged in the shell; the negative resin filter element is communicated with the positive resin filter element, and both the negative resin filter element and the positive resin filter element are communicated with a pipeline; the ratio of the cation resin to the anion resin in the resin filtering mechanism is adjusted to enable the effluent water to be acidic or alkaline, and after the acidic and alkaline water enters the pipeline, scale in the pipeline and the valve is cleaned.

Through the scheme, the invention at least obtains the following technical effects: by controlling the valves, tap water flows in from the pretreatment mechanism and flows through the reverse osmosis mechanism, the resin filtering mechanism and the post-treatment mechanism in sequence to obtain purified water. The effect of softening tap water to obtain purified water is realized. When the scale in the valve needs to be flushed, the proportion of the anion resin filter element and the cation resin filter element in the resin filter mechanism is adjusted, so that the water treated by the resin filter mechanism is acidic or alkaline, the acidic water or the alkaline water flows through the valves through the control valve, and the scale accumulated in the valve is dissolved by reaction, so that the valve is flushed by acidic or alkaline solution generated by the resin filter device to remove the scale on the premise of not disassembling the valve. The complicated step of dismantling the valve is avoided, and the problem of pipeline leakage caused by the reduction of the sealing performance of the valve connecting end due to frequent dismantling of the valve is avoided.

The housing of the resin filter mechanism is charged with positive and negative charges through a lead wire, and is used to provide an electric field environment required for resin reaction.

Preferably, the pretreatment mechanism comprises a tap water input end, a PP/scale inhibition activated carbon filter component, a first electromagnetic valve, a pressure reducing valve and a diaphragm pump which are sequentially connected in series through pipelines; the diaphragm pump is connected with the reverse osmosis mechanism in series; the post-treatment mechanism comprises a UF/active carbon filtering component, an ultraviolet disinfection component and a purified water output end which are sequentially connected in series through pipelines; the UF/active carbon filter component is communicated with a pure water output end of the reverse osmosis mechanism through a pipeline, and/or the UF/active carbon filter component is communicated with the resin filter mechanism through a pipeline.

The PP/scale inhibition activated carbon filter component is a coarse filter structure which adopts PP cotton as a filter element and/or adopts scale inhibition activated carbon as a filter element and is used for preliminarily filtering tap water. The first electromagnetic valve is used for controlling the on-off of tap water. Pressure reducing valves and diaphragm pumps are used to regulate flow and pressure. The water flow after preliminary filtration and pressure regulation by the pretreatment mechanism enters the reverse osmosis mechanism. And the reverse osmosis mechanism is used for filtering again.

The UF/active carbon filter component is a filter structure which adopts a hollow fiber ultrafiltration membrane as a filter element and/or adopts active carbon as a filter element and is used for finally filtering the treated pure water. The ultraviolet disinfection component is a structure for irradiating, sterilizing and disinfecting pure water through ultraviolet light, and an ultraviolet lamp is generally adopted.

The resin filtering device can soften tap water through three schemes:

the first scheme is as follows: tap water flows in from a tap water input end, sequentially flows through the PP/scale inhibition activated carbon filtering component, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump, the reverse osmosis mechanism, the UF/activated carbon filtering component and the ultraviolet disinfection component, and finally softened pure water is obtained from a purified water output end. The scheme does not adopt a resin filtering mechanism, the pure water softened by the reverse osmosis mechanism has less water consumption and low efficiency, is suitable for a small amount of water, and can reduce the loss of the positive resin filter element and the negative resin filter element.

The second scheme is as follows: tap water flows in from a tap water input end, sequentially flows through the PP/scale inhibition activated carbon filtering component, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump, the reverse osmosis mechanism, the resin filtering mechanism, the UF/activated carbon filtering component and the ultraviolet disinfection component, and finally softened pure water is obtained from a purified water output end. The scheme adds a resin filtering mechanism to obtain the pure water with high water quality.

The third scheme is as follows: tap water flows in from a tap water input end and sequentially flows through the PP/scale-inhibiting activated carbon filtering component, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump and the reverse osmosis mechanism; and a part of purified water passes through the UF/active carbon filtering component and the ultraviolet disinfection component in sequence from the purified water output end of the reverse osmosis mechanism, and finally softened purified water is obtained from the purified water output end. And part of the concentrated water flows through the resin filtering mechanism, the UF/active carbon filtering component and the ultraviolet disinfection component in sequence from the concentrated water output end of the reverse osmosis mechanism, and finally softened pure water is obtained from the purified water output end. The total amount of the two parts of pure water is the pure water amount obtained by the scheme.

Preferably, three TDS water quality detectors are further included; the first TDS water quality detector is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and used for detecting the water quality of a tap water input end; the second TDS water quality detector is arranged on a pipeline between the resin filtering mechanism and the UF/active carbon filtering component and is used for detecting the water quality of the effluent water flow treated by the resin filtering mechanism; the third TDS water quality detector is arranged on a pipeline between the UF/active carbon filtering component and the ultraviolet disinfection component and used for detecting the water quality of the water flow at the purified water output end.

The first TDS water quality detector is used for detecting the water quality of initial tap water. The second TDS water quality monitor is used for detecting whether the water quality of the obtained pure water reaches the standard after the softening of the reverse osmosis mechanism and the resin filtering mechanism. The third TDS water quality detector is used for detecting the quality of the pure water when the softening is finally finished. Meanwhile, whether the proportion of the positive resin filter element and the negative resin filter element in the resin filtering mechanism needs to be adjusted or not can be deduced by comparing the numerical values of the three TDS water quality monitors, or whether the filter element needs to be replaced or not can be deduced.

Total Dissolved Solids (TDS), also known as Total dissolved solids, is measured in milligrams per liter (mg/L). It indicates how many milligrams of soluble solids were dissolved in 1 liter of water. Higher TDS values indicate more solutes in the water. Thus, the quality of the pure water is judged.

Preferably, two flow sensors are also included; the first flow sensor is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and used for detecting the flow flowing into the diaphragm pump; and the second flow sensor is arranged on a pipeline between the UF/active carbon filtering component and the ultraviolet disinfection component and is used for detecting the flow of the purified water output end.

The flow rate of the water flow flowing out from the pressure reducing valve is obtained by the first flow sensor as a reference value for adjusting the power of the diaphragm pump. The pressure difference in the reverse osmosis mechanism is within a rated range, and the reverse osmosis mechanism can work normally to achieve a filtering effect. The phenomenon that the RO membrane is broken due to overlarge pressure of fluid input into the reverse osmosis mechanism or cannot permeate due to insufficient osmotic pressure due to overlarge pressure is avoided. The second flow sensor is used for acquiring the flow of the pure water at the purified water output end, so that the working efficiency and the working capacity of the resin water filtering device can be counted conveniently. Is convenient for regular maintenance and filter element replacement.

Preferably, two temperature sensors are also included; the first temperature sensor is arranged on a pipeline between the pressure reducing valve and the diaphragm pump and used for detecting the temperature of water flow flowing into the diaphragm pump; the second temperature sensor is mounted on the housing of the resin filter mechanism and used for detecting the temperature of the resin filter mechanism.

The first temperature sensor is used for detecting the temperature of tap water flowing into the resin water filtering device, and the phenomenon that the reverse osmosis mechanism cannot normally exert the osmosis effect due to overhigh or overlow temperature of the tap water is avoided. The second temperature sensor is used for detecting the temperature of the numerical value filtering mechanism and preventing the filter element from being damaged due to overhigh temperature. Meanwhile, the numerical values of the first temperature sensor and the second temperature sensor are compared, and the reaction degree of the filter element and concentrated water in the resin filtering mechanism can be deduced from the temperature difference of the first temperature sensor and the second temperature sensor, so that whether the machine needs to be stopped or the filter element needs to be replaced is judged.

Preferably, the concentrated water output end of the reverse osmosis mechanism is communicated with a waste water discharge end through a regenerated water pipeline; a fifth electromagnetic valve and a second electromagnetic valve are sequentially arranged on the regeneration water pipeline and used for controlling the on-off of the pipeline; a reclaimed water pipeline between the fifth electromagnetic valve and the second electromagnetic valve is communicated with the resin filtering mechanism through an acidic water pipeline provided with a sixth electromagnetic valve; and a first three-way valve is further installed on the regeneration water pipeline between the fifth electromagnetic valve and the second electromagnetic valve, the port a and the port b of the first three-way valve are connected into the regeneration water pipeline, and the port c is communicated with the negative resin filter element or the positive resin filter element through a pipeline.

When the reverse osmosis mechanism is independently flushed, the concentrated water accumulated in the chamber where the concentrated solution is located after the reverse osmosis mechanism is flushed directly flows to a waste water discharge end through a regenerated water pipeline to be discharged. And the fifth electromagnetic valve is used for controlling the on-off between the concentrated water output end of the reverse osmosis mechanism and the regeneration water pipeline. The second solenoid valve is used for controlling the opening/closing of the waste water discharge end.

Since the regenerated water pipe is used to discharge concentrated water, scale is easily generated by itself and the fifth and second solenoid valves installed thereon. Therefore, acidic water or alkaline water generated in the resin filtering mechanism is introduced into the regeneration water pipeline through the acidic water pipeline for descaling. Meanwhile, the sixth electromagnetic valve is used for controlling the on-off of the acidic water pipeline.

After the reverse osmosis mechanism is washed, when the resin filtering mechanism is washed, water flowing through a negative resin filter element or a positive resin filter element in the resin filtering mechanism flows into a regeneration water pipeline through a port c of the first three-way valve. And finally discharged from the waste water discharge end.

Preferably, the concentrated water output end of the reverse osmosis mechanism is communicated with the negative resin filter element or the positive resin filter element through a pipeline; the UF/active carbon filtering component is sequentially connected with a first one-way valve, a third electromagnetic valve and a negative resin filter element or a positive resin filter element of the resin filtering mechanism in series through a pipeline; the direction of the first one-way valve is from the resin filtering mechanism to the UF/active carbon filtering component; the reverse osmosis mechanism is different from the resin filter element communicated with the UF/active carbon filter component.

In the process of softening tap water, concentrated water flowing out of a concentrated water output end of the reverse osmosis mechanism firstly passes through the positive resin filter element or the negative resin filter element, then passes through the negative resin filter element or the positive resin filter element, and then passes through the third electromagnetic valve and the first one-way valve to enter the UF/active carbon filtering component and the ultraviolet disinfection component, and finally pure water is obtained. In the resin filtering mechanism, concentrated water flows out through the third electromagnetic valve only when meeting the filtering condition of both the positive resin filter element and the negative resin filter element. Namely, the concentrated water flows in from the positive resin filter element and flows out from the negative resin filter element; the concentrated water flows in from the negative resin filter element and flows out from the positive resin filter element.

Preferably, a second three-way valve is installed on a pipeline between the pure water output end of the reverse osmosis mechanism and the input end of the UF/active carbon filtering component, an a port and a b port of the second three-way valve are respectively communicated with the pure water output end of the reverse osmosis mechanism and the input end of the UF/active carbon filtering component through pipelines, a c port of the second three-way valve is communicated with an ultrafiltration back flush pipeline, and the other end of the ultrafiltration back flush pipeline is communicated with a pipeline between the output end of the UF/active carbon filtering component and the ultraviolet disinfection component.

The ultrafiltration back-flushing pipeline is connected through a second three-way valve, so that the connection relation of the ultrafiltration back-flushing pipeline and the UF/active carbon filtering component in parallel is realized. The port b of the second three-way valve is communicated with the UF/active carbon filtering component, and the port c of the second three-way valve is communicated with the ultrafiltration backwashing pipeline. And when the port b is closed and the port c is opened, water flowing out of the pure water output end of the reverse osmosis mechanism flows through the ultrafiltration backwashing pipeline, flows in from the output end of the UF/active carbon filtering component and flows out from the input end of the UF/active carbon filtering component. The compacted activated carbon layer is loosened and impurities are washed away through backwashing, and the contact area between granular activated carbon and water flow is increased. Or impurities attached to the hollow fiber ultrafiltration membrane can be washed away through backwashing, and the filtering effect of the hollow fiber ultrafiltration membrane is recovered.

Preferably, a pipeline between the UF/active carbon filter component and the second three-way valve is communicated with a regenerated water pipeline through a parallel pipeline; a fourth electromagnetic valve and a second one-way valve are sequentially connected in series on the parallel pipeline; the fourth electromagnetic valve is used for controlling the on-off of the parallel pipelines; the second check valve is in a direction from the second three-way valve to the second solenoid valve.

The parallel pipeline is used for guiding the water flow of the backwashing UF/active carbon filter assembly to enter a reclaimed water pipeline and finally discharged from a waste water discharge end. The parallel pipeline is controlled to be switched on and switched off by a fourth electromagnetic valve, and the second one-way valve prevents water in the regeneration water pipeline from flowing backwards. The parallel pipeline can also introduce the water flow which does not reach the standard after being treated by the reverse osmosis mechanism and/or the resin filtering mechanism into a reclaimed water pipeline for discharging, so that the problem that the water with substandard water quality consumes the UF/active carbon filtering component and the ultraviolet disinfection component and even pollutes a purified water output end is avoided.

The invention also provides a washing method, the resin water filtering device according to the scheme comprises the following steps: s1: flushing the reverse osmosis mechanism;

opening ports a and b of a first electromagnetic valve, a second electromagnetic valve, a fifth electromagnetic valve and a second three-way valve; closing the third electromagnetic valve, the fourth electromagnetic valve and the sixth electromagnetic valve;

starting the diaphragm pump, wherein tap water flows into the reverse osmosis mechanism from the tap water input end through the PP/scale-inhibiting activated carbon filter component, the first electromagnetic valve, the pressure reducing valve and the diaphragm pump in sequence for flushing;

the water flow filtered by the reverse osmosis mechanism is divided into two parts to be discharged: the concentrated water filtered by the reverse osmosis mechanism flows through the regeneration water pipeline and the second electromagnetic valve in sequence from the concentrated water output end and is finally discharged from the waste water discharge end; the pure water filtered by the reverse osmosis mechanism flows through a second three-way valve, a UF/active carbon filtering component and an ultraviolet disinfection component from a pure water output end and is finally discharged from a purified water output end;

continuously washing for 10-20 min;

s2: flushing the resin filtration mechanism;

after the step S1 is completed, the third electromagnetic valve is opened; closing the second solenoid valve and the fifth solenoid valve;

starting the diaphragm pump, wherein tap water flows through the PP/scale inhibition activated carbon filter component, the first electromagnetic valve, the pressure reducing valve, the diaphragm pump and the reverse osmosis mechanism from the tap water input end in sequence;

the water flow filtered by the reverse osmosis mechanism is divided into two parts to be discharged: concentrated water filtered by the reverse osmosis mechanism flows through a positive resin filter element in the resin filtering mechanism, a negative resin filter element in the resin filtering mechanism, a third electromagnetic valve, a first one-way valve, a UF/active carbon filtering component and an ultraviolet disinfection component in sequence from a concentrated water output end, and is finally discharged from a purified water output end; the pure water filtered by the reverse osmosis mechanism flows through a second three-way valve, a UF/active carbon filtering component and an ultraviolet disinfection component from a pure water output end and is finally discharged from a purified water output end;

and continuously washing for 2-8 min.

The flushing method can be used for independently flushing the reverse osmosis mechanism without polluting filter elements of other filter structures. The waste water for washing the reverse osmosis mechanism can enter the resin filtering mechanism from the concentrated water output end and is converted into pure water after being purified by the resin filtering mechanism, and the waste water discharge can be reduced. Meanwhile, after the concentrated water enters the positive resin filter element or the negative resin filter element in the resin filtering mechanism from the concentrated water output end of the reverse osmosis mechanism, the concentrated water is acidic or alkaline, and the concentrated water flows along with the water to clean the pipeline and remove scales in the pipeline and the valve on the way.

Drawings

Fig. 1 is a schematic structural diagram of a resin water filtering device provided in an embodiment of the present invention.

Fig. 2 is a schematic structural diagram of a resin filter mechanism according to an embodiment of the present invention.

Legend:

1, a reverse osmosis mechanism; 2, a resin filtering mechanism; 3, a pretreatment mechanism; 4, a post-processing mechanism; 5, a valve; 6, a pipeline;

21 a housing; 22-negative resin cartridge; a 23-cation resin cartridge;

31 a tap water input; 32 PP/scale inhibition activated carbon filter component; 33 a diaphragm pump; 34 a pressure reducing valve;

41 UF/active carbon filter components; 42 a UV sterilizing assembly; 43 a purified water output;

51 a first solenoid valve; 52 a second solenoid valve; 53 third solenoid valve; 54 a fourth solenoid valve; 55 a fifth solenoid valve; 56 a sixth solenoid valve; 57 a first three-way valve; 58 a second three-way valve;

61 a regenerated water pipeline; 62 a sour water conduit; 63, ultra-filtering and back-flushing the pipeline; 64 parallel pipes;

71 a first TDS water quality detector; 72 second TDS water quality detector; 73 a third TDS water quality detector;

81 a first flow sensor; 82 a second flow sensor;

91 a first temperature sensor; 92 a second temperature sensor;

591 first one-way valve; 592 a second one-way valve;

611 waste water discharge end.

Detailed Description

The invention is further illustrated by the following figures and examples.

Please refer to fig. 1 and fig. 2.

Example 1:

a resin water filtering device comprises a pretreatment mechanism 3, a reverse osmosis mechanism 1, a resin filtering mechanism 2 and a post-treatment mechanism 4 which are sequentially connected by a pipeline 6; a plurality of valves 5 for controlling the on-off and/or flow of the pipeline 6 are arranged on the pipeline 6; the resin filter mechanism 2 comprises a housing 21, a female resin filter element 22 and a male resin filter element 23 which are arranged in the housing 21; the negative resin filter element 22 is communicated with the positive resin filter element 23, and both the negative resin filter element 22 and the positive resin filter element 23 are communicated with the pipeline 6.

Through the scheme, the invention at least obtains the following technical effects: by controlling the valves 5, tap water flows in from the pretreatment mechanism 3 and sequentially flows through the reverse osmosis mechanism 1, the resin filtration mechanism 2 and the post-treatment mechanism 4 to obtain purified water. The effect of softening tap water to obtain purified water is realized. When the scale in the valve 5 needs to be washed, the proportion of the anion resin filter element 22 and the cation resin filter element 23 in the resin filter mechanism 2 is adjusted to make the water treated by the resin filter mechanism 2 acidic or alkaline, and then the acidic water or the alkaline water flows through each valve 5 by controlling the valve 5, so that the scale accumulated in the valve 5 is dissolved by reaction, and the valve 5 is washed and descaled by the acidic or alkaline solution generated by the resin filter device on the premise of not detaching the valve 5. The complicated step of dismantling the valve 5 is avoided, and the problem that the pipeline 6 leaks due to the reduction of the sealing performance of the connecting end of the valve 5 caused by frequently dismantling the valve 5 is avoided.

The case 21 of the resin filter mechanism 2 is charged with positive and negative charges through a lead wire, and is used to provide an electric field environment necessary for a resin reaction.

Based on the above embodiment, in order to further improve the water quality and add the filtering process, in an embodiment, the pretreatment mechanism 3 includes a tap water input end 31, a PP/scale inhibiting activated carbon filtering component 32, a first electromagnetic valve 51, a pressure reducing valve 34 and a diaphragm pump 33 which are connected in series by a pipeline 6; the diaphragm pump 33 is connected with the reverse osmosis mechanism 1 in series; the post-treatment mechanism 4 comprises a UF/active carbon filter component 41, an ultraviolet disinfection component 42 and a purified water output end 43 which are connected in series by a pipeline 6 in sequence; the UF/active carbon filter assembly 41 is communicated with a pure water output end of the reverse osmosis mechanism 1 through a pipeline 6, and/or the UF/active carbon filter assembly 41 is communicated with the resin filter mechanism 2 through a pipeline 6.

The PP/scale inhibiting activated carbon filter assembly 32 is a coarse filter structure using PP cotton as a filter element and/or scale inhibiting activated carbon as a filter element, and is used for preliminary filtering tap water. The first electromagnetic valve 51 is used for controlling the on-off of tap water. A pressure reducing valve 34 and a diaphragm pump 33 are used to regulate the flow and pressure. The water flow after the preliminary filtration and pressure regulation by the pretreatment mechanism 3 enters the reverse osmosis mechanism 1. The reverse osmosis unit 1 carries out filtration again.

The UF/activated carbon filter unit 41 is a filter structure using a hollow fiber ultrafiltration membrane as a filter element and/or activated carbon as a filter element, and is used to perform final filtration of the treated pure water. The ultraviolet sterilizing unit 42 is a structure for sterilizing and disinfecting pure water by irradiating ultraviolet light, and generally employs an ultraviolet lamp.

The resin filtering device can soften tap water through three schemes:

the first scheme is as follows: tap water flows in from a tap water input end 31, sequentially flows through the PP/scale inhibition activated carbon filter assembly 32, the first electromagnetic valve 51, the pressure reducing valve 34, the diaphragm pump 33, the reverse osmosis mechanism 1, the UF/activated carbon filter assembly 41 and the ultraviolet disinfection assembly 42, and finally obtains softened pure water from a purified water output end 43. The scheme does not adopt the resin filtering mechanism 2, the pure water softened by the reverse osmosis mechanism 1 has small quantity and low efficiency, is suitable for a small quantity of water, and can reduce the loss of the positive resin filter element 23 and the negative resin filter element 22.

The second scheme is as follows: tap water flows in from a tap water input end 31, sequentially flows through the PP/scale inhibition activated carbon filter component 32, the first electromagnetic valve 51, the pressure reducing valve 34, the diaphragm pump 33, the reverse osmosis mechanism 1, the resin filter mechanism 2, the UF/activated carbon filter component 41 and the ultraviolet disinfection component 42, and finally obtains softened pure water from a purified water output end 43. The resin filtering mechanism 2 is added in the scheme, and the pure water with high water quality is obtained.

The third scheme is as follows: tap water flows in from a tap water input end 31 and sequentially flows through the PP/scale inhibition activated carbon filter assembly 32, the first electromagnetic valve 51, the pressure reducing valve 34, the diaphragm pump 33 and the reverse osmosis mechanism 1; a part of the purified water passes through the UF/activated carbon filter unit 41 and the ultraviolet ray sterilization unit 42 in this order from the purified water output terminal of the reverse osmosis mechanism 1, and finally softened purified water is obtained from the purified water output terminal 43. Part of the concentrated water flows through the resin filtering mechanism 2, the UF/active carbon filtering component 41 and the ultraviolet disinfection component 42 in sequence from the concentrated water output end of the reverse osmosis mechanism 1, and finally softened pure water is obtained from the purified water output end 43. The total amount of the two parts of pure water is the pure water amount obtained by the scheme.

Based on the above examples, it should be noted that UF is an abbreviation for ultrafiltration, which is one of membrane separation techniques using pressure as driving force. The pore diameter of the membrane is between 20 and 1000A DEG for the purpose of separating macromolecules from small molecules. The hollow fiber ultrafilter (membrane) has the advantages of high filling density in a unit container, small occupied area and the like.

Based on the above embodiments, it should be noted that reverse osmosis is also called reverse osmosis, and abbreviated as RO, a membrane separation operation that uses a pressure difference as a driving force to separate a solvent from a solution. Reverse osmosis is known because it is in the opposite direction to natural osmosis. According to different osmotic pressures of various materials, a reverse osmosis pressure which is larger than the osmotic pressure, namely a reverse osmosis method, can be used for achieving the purposes of separation, extraction, purification and concentration. The method is characterized in that dilute solution (such as fresh water) and concentrated solution (such as seawater or saline water) with the same volume are respectively arranged at two sides of a container, the middle part of the container is blocked by a semipermeable membrane, a solvent in the dilute solution naturally penetrates through the semipermeable membrane and flows towards the concentrated solution side, the liquid level at the concentrated solution side is higher than that of the dilute solution by a certain height to form a pressure difference, an osmotic equilibrium state is achieved, the pressure difference is osmotic pressure, and the magnitude of the osmotic pressure is determined by the type, concentration and temperature of the concentrated solution and is irrelevant to the property of the semipermeable membrane. If a pressure greater than the osmotic pressure is applied to the concentrate side, the solvent in the concentrate flows toward the dilute solution in a direction opposite to that of the original permeate, a process known as reverse osmosis. In this embodiment, the pure water output end corresponding to the reverse osmosis mechanism 1 is communicated with the chamber where the dilute solution is located, and the concentrated water output end is communicated with the chamber where the concentrated solution is located. The two chambers are separated by an RO membrane.

Based on the above embodiments, it should be noted that the diaphragm pump 33 is actually an embolic pump, and the plunger and the pump cylinder are protected by separating the infused liquid from the plunger and the pump cylinder through a film. The left side of the diaphragm, which is in contact with the liquid, is made of corrosion-resistant materials or coated with a layer of corrosion-resistant substances; the right side of the diaphragm is filled with water or oil.

Based on the above embodiment, in order to detect the water quality value of each node, and facilitate calculation and judgment of the time for maintenance and filter element replacement, in an embodiment, the system further comprises three TDS water quality detectors; wherein the first TDS water quality detector 71 is mounted on the pipeline 6 between the pressure reducing valve 34 and the diaphragm pump 33 and is used for detecting the water quality of the tap water input end 31; the second TDS water quality detector 72 is mounted on the pipeline 6 between the resin filtering mechanism 2 and the UF/activated carbon filtering component 41, and is used for detecting the water quality of the effluent water flow treated by the resin filtering mechanism 2; a third TDS water quality detector 73 is mounted on the pipe 6 between the UF/charcoal filter assembly 41 and the uv disinfection assembly 42 for detecting the quality of the water flowing from the purified water output 43. The first TDS water quality detector 71 is used to detect the quality of the initial tap water. The second TDS water quality monitor is used to detect whether the quality of the obtained pure water reaches the standard after the softening by the reverse osmosis mechanism 1 and the resin filtration mechanism 2. The third TDS water quality detector 73 is used to detect the quality of pure water at the final completion of softening. Meanwhile, by comparing the values of the three TDS water quality monitors, it can be inferred whether the ratio of the positive resin filter element 23 and the negative resin filter element 22 in the resin filter mechanism 2 needs to be adjusted or whether the filter elements need to be replaced.

Based on the above examples, it is noted that Total Dissolved Solids (TDS), also known as Total dissolved solids, is measured in milligrams per liter (mg/L). It indicates how many milligrams of soluble solids were dissolved in 1 liter of water. Higher TDS values indicate more solutes in the water. Thus, the quality of the pure water is judged.

Based on the above embodiment, in order to detect the flow value of each node, and facilitate calculating and adjusting the flow and pressure of the fluid, in an embodiment, the system further includes two flow sensors; wherein the first flow sensor 81 is installed on the pipe 6 between the pressure reducing valve 34 and the diaphragm pump 33 for detecting the flow rate flowing into the diaphragm pump 33; a second flow sensor 82 is installed on the pipe 6 between the UF/charcoal filter module 41 and the uv disinfection module 42 for detecting the flow of the purified water output 43. The flow rate of the water flowing out of the pressure reducing valve 34 is acquired by the first flow rate sensor 81 as a reference value for adjusting the power level of the diaphragm pump 33. The pressure difference in the reverse osmosis mechanism 1 is within a rated range, and the reverse osmosis mechanism can work normally to achieve a filtering effect. The phenomenon that the RO membrane is broken due to overlarge pressure of fluid input into the reverse osmosis mechanism 1 or cannot permeate due to insufficient osmotic pressure due to overlarge pressure is avoided. The second flow sensor 82 is used for acquiring the flow of the pure water at the purified water output end 43 so as to count the working efficiency and the working capacity of the resin water filtering device. Is convenient for regular maintenance and filter element replacement.

Based on the above embodiment, in order to detect the temperature value of each node, and facilitate calculation and control of the opening and closing of each valve 5, in an embodiment, the system further includes two temperature sensors; wherein the first temperature sensor 91 is installed on the pipe 6 between the pressure reducing valve 34 and the diaphragm pump 33 for detecting the temperature of the water flow flowing into the diaphragm pump 33; the second temperature sensor 92 is attached to the housing 21 of the resin filter mechanism 2 and detects the temperature of the resin filter mechanism 2. The first temperature sensor 91 is used for detecting the temperature of tap water flowing into the resin water filtering device, and the phenomenon that the reverse osmosis mechanism 1 cannot normally exert the osmosis effect due to overhigh or overlow temperature of the tap water is avoided. The second temperature sensor 92 is used for detecting the temperature of the numerical filter mechanism, and preventing the filter element from being damaged due to overhigh temperature. Meanwhile, the values of the first temperature sensor 91 and the second temperature sensor 92 are compared, and the degree of reaction between the filter element and the concentrate in the resin filter mechanism 2 can be estimated from the temperature difference between the two values, so as to judge whether the shutdown or the filter element replacement is required.

Based on the above embodiment, in order to facilitate the independent flushing of the reverse osmosis mechanism 1 and avoid the pollution to other filtering structures, in an embodiment, the concentrated water output end of the reverse osmosis mechanism 1 is communicated with the waste water discharge end 611 through the regenerated water pipeline 61; a fifth electromagnetic valve 55 and a second electromagnetic valve 52 are sequentially installed on the regeneration water pipeline 61 and used for controlling the on-off of the pipeline 6; a regeneration water pipe 61 between the fifth electromagnetic valve 55 and the second electromagnetic valve 52 is communicated with the resin filter mechanism 2 through an acid water pipe 62 provided with a sixth electromagnetic valve 56; a first three-way valve 57 is further installed on the regenerated water pipe 61 between the fifth electromagnetic valve 55 and the second electromagnetic valve 52, a port a and a port b of the first three-way valve 57 are connected to the regenerated water pipe 61, and a port c is communicated with the female resin filter element 22 or the male resin filter element 23 through a pipe 6.

When the reverse osmosis mechanism 1 is separately flushed, the concentrated water in the chamber in which the concentrated solution is accumulated after the reverse osmosis mechanism 1 is flushed flows directly to the waste water discharge end 611 through the regenerated water pipe 61 to be discharged. The fifth electromagnetic valve 55 is used for controlling the on-off between the concentrated water output end of the reverse osmosis mechanism 1 and the regenerated water pipeline 61. The second solenoid valve 52 is used to control the opening/closing of the waste water discharge end 611.

Since the regeneration water pipe 61 is used to discharge the concentrate, scale is easily generated by itself and the fifth and second electromagnetic valves 55 and 52 mounted thereon. The acidic water or the alkaline water generated in the resin filter mechanism 2 is thus introduced into the regenerated water pipe 61 through the acidic water pipe 62 for descaling. Meanwhile, the sixth electromagnetic valve 56 is used for controlling the on-off of the acid water pipeline 62.

After the reverse osmosis mechanism 1 is flushed, when the resin filter mechanism 2 is flushed again, the water flowing through the negative resin filter element 22 or the positive resin filter element 23 in the resin filter mechanism 2 flows into the regenerated water pipe 61 through the c port of the first three-way valve 57. And finally discharged from the waste water discharge end 611.

Based on the above embodiment, in order to further enhance the softening effect of the tap water, in an embodiment, the concentrated water output end of the reverse osmosis mechanism 1 is communicated with the female resin filter element 22 or the male resin filter element 23 through the pipeline 6; the UF/active carbon filter assembly 41 is sequentially connected in series with a first check valve 591, a third electromagnetic valve 53 and a female resin filter core 22 or a male resin filter core 23 of the resin filter mechanism 2 through a pipeline 6; the first check valve 591 is in the direction from the resin filter mechanism 2 to the UF/activated carbon filter module 41; the reverse osmosis mechanism 1 is different from the resin filter cartridge communicating with the UF/activated carbon filter module 41. In the process of softening tap water, concentrated water flowing out of a concentrated water output end of the reverse osmosis mechanism 1 firstly passes through the positive resin filter element 23 or the negative resin filter element 22, then passes through the negative resin filter element 22 or the positive resin filter element 23, and then passes through the third electromagnetic valve 53 and the first one-way valve 591 to enter the UF/active carbon filter component 41 and the ultraviolet disinfection component 42, so that pure water is finally obtained. In the resin filtering mechanism 2, the concentrated water flows out through the third electromagnetic valve 53 only when the concentrated water meets the filtering condition of both the positive resin filter element 23 and the negative resin filter element 22. Namely, the concentrated water flows in from the male resin filter element 23 and flows out from the female resin filter element 22; the concentrated water flows in from the female resin filter element 22 and flows out from the male resin filter element 23.

Based on the above embodiment, in order to realize the backwashing effect on the UF/activated carbon filter assembly 41, in an embodiment, a second three-way valve 58 is installed on the pipeline 6 between the pure water output end of the reverse osmosis mechanism 1 and the input end of the UF/activated carbon filter assembly 41, the port a and the port b of the second three-way valve 58 are respectively communicated with the pure water output end of the reverse osmosis mechanism 1 and the input end of the UF/activated carbon filter assembly 41 through the pipeline 6, the port c is communicated with an ultrafiltration backwashing pipeline 63, and the other end of the ultrafiltration backwashing pipeline 63 is communicated with the pipeline 6 between the output end of the UF/activated carbon filter assembly 41 and the ultraviolet disinfection assembly 42. The ultrafiltration back-flushing pipeline 63 is connected through the second three-way valve 58, so that the connection relationship between the ultrafiltration back-flushing pipeline 63 and the UF/active carbon filter component 41 in parallel is realized. The port b of the second three-way valve 58 is communicated with the UF/active carbon filter assembly 41, and the port c of the second three-way valve 58 is communicated with the ultrafiltration backwash pipeline 63. When the port b is closed and the port c is opened, the water flowing out from the pure water output end of the reverse osmosis mechanism 1 flows through the ultrafiltration backwashing pipeline 63, flows in from the output end of the UF/active carbon filter component 41 and flows out from the input end of the UF/active carbon filter component 41. The compacted activated carbon layer is loosened and impurities are washed away through backwashing, and the contact area between granular activated carbon and water flow is increased. Or impurities attached to the hollow fiber ultrafiltration membrane can be washed away through backwashing, and the filtering effect of the hollow fiber ultrafiltration membrane is recovered.

Based on the above embodiment, in order to facilitate the discharge of backwash wastewater of the UF/activated carbon filter assembly 41 and the discharge of substandard water without contaminating the purified water output 43, in one embodiment, the pipeline 6 between the UF/activated carbon filter assembly 41 and the second three-way valve 58 is connected to the regenerated water pipeline 61 through the parallel pipeline 64; the parallel pipeline 64 is sequentially connected with a fourth electromagnetic valve 54 and a second one-way valve 592 in series; the fourth electromagnetic valve 54 is used for controlling the on-off of the parallel pipeline 64; the second check valve 592 is oriented to flow from the second three-way valve 58 to the second solenoid valve 52. Parallel conduit 64 is used to direct the water flow of backwash UF/activated carbon filter module 41 into regeneration water conduit 61 for eventual discharge from waste water discharge end 611. The parallel pipe 64 is opened and closed by the fourth solenoid valve 54, and the second check valve 592 prevents the reverse flow of the water of the regeneration water pipe 61. The parallel pipeline 64 can also lead the water flow which does not reach the standard after being treated by the reverse osmosis mechanism 1 and/or the resin filtering mechanism 2 to the regenerated water pipeline 61 for discharging, so as to avoid the water with unqualified water quality from consuming the UF/active carbon filtering component 41 and the ultraviolet disinfection component 42 and even polluting the purified water output end 43.

Example 2:

on the basis of example 1, the present invention also provides a rinsing method, the resin water filtering device according to the above scheme, comprising the steps of:

s1: flushing the reverse osmosis mechanism 1;

opening ports a and b of the first solenoid valve 51, the second solenoid valve 52, the fifth solenoid valve 55, and the second three-way valve 58; closing the third, fourth, and sixth solenoid valves 53, 54, 56;

starting the diaphragm pump 33, running water flows into the reverse osmosis mechanism 1 from the running water input end 31 through the PP/scale inhibition activated carbon filter component 32, the first electromagnetic valve 51, the reducing valve 34 and the diaphragm pump 33 in sequence for flushing;

the water flow filtered by the reverse osmosis mechanism 1 is divided into two parts to be discharged: the concentrated water filtered by the reverse osmosis mechanism 1 flows through the regeneration water pipeline 61, the second electromagnetic valve 52 in sequence from the concentrated water output end and is finally discharged from the waste water discharge end 611; the pure water filtered by the reverse osmosis mechanism 1 flows through the second three-way valve 58, the UF/active carbon filtering component 41 and the ultraviolet disinfection component 42 from the pure water output end and is finally discharged from the purified water output end 43;

continuously washing for 10-20 min; and judging the specific flushing time according to the length of the interval between two adjacent flushes and the water quality of the discharged water. The duration of the flushing is typically 15min in this example.

S2: flushing the resin filtering mechanism 2;

after the completion of the above step S1, the third electromagnetic valve 53 is opened; closing the second solenoid valve 52 and the fifth solenoid valve 55;

starting the diaphragm pump 33, running water flows through the PP/scale inhibition activated carbon filter component 32, the first electromagnetic valve 51, the reducing valve 34, the diaphragm pump 33 and the reverse osmosis mechanism 1 from the running water input end 31 in sequence;

the water flow filtered by the reverse osmosis mechanism 1 is divided into two parts to be discharged: the concentrated water filtered by the reverse osmosis mechanism 1 sequentially flows through the positive resin filter element 23 in the resin filtering mechanism 2, the negative resin filter element 22 in the resin filtering mechanism 2, the third electromagnetic valve 53, the first one-way valve 591, the UF/active carbon filtering component 41 and the ultraviolet disinfection component 42 from the concentrated water output end, and is finally discharged from the purified water output end 43; the pure water filtered by the reverse osmosis mechanism 1 flows through the second three-way valve 58, the UF/active carbon filtering component 41 and the ultraviolet disinfection component 42 from the pure water output end and is finally discharged from the purified water output end 43;

and continuously washing for 2-8 min. And judging the specific flushing time according to the length of the interval between two adjacent flushes and the water quality of the discharged water. The duration of flushing is typically 5min in this example.

The flushing method can be used for independently flushing the reverse osmosis mechanism 1 without polluting filter elements of other filter structures. The wastewater for washing the reverse osmosis mechanism 1 can enter the resin filtering mechanism 2 from a concentrated water output end, and is changed into pure water after being purified by the resin filtering mechanism 2, so that the wastewater discharge can be reduced. Meanwhile, after the concentrated water enters the positive resin filter element 23 or the negative resin filter element 22 in the resin filtering mechanism 2 from the concentrated water output end of the reverse osmosis mechanism 1, the concentrated water is acidic or alkaline, and the concentrated water flows along with the water to clean the pipeline 6 and remove scales in the pipeline 6 and the valve 5.

Various technical features in the above embodiments may be arbitrarily combined as long as there is no conflict or contradiction in the combination between the features, but is limited to the space and is not described one by one.

The present invention is not limited to the above-described embodiments, and various changes and modifications of the present invention are intended to be included within the scope of the claims and the equivalent technology of the present invention if they do not depart from the spirit and scope of the present invention.