1. A novel flow control pump with a waterway switching structure comprises a pump head body (04) and a pump cover (10), wherein a water inlet cavity (05) is arranged in the pump head body (04), a pressurizing cavity (03), a water outlet cavity (06) and a vacuum cavity (08) are communicated, the water inlet cavity (05) is communicated with a water inlet (07), the vacuum cavity (08) is communicated with the pressurizing cavity (03) through a water inlet flow channel (09) and a water inlet one-way structure in sequence, the pressurizing cavity (03) is communicated with the water outlet cavity (06) through a water outlet one-way structure, a waterway communicated with the water inlet cavity (05) and the vacuum cavity (08) is provided with a flow control assembly for controlling the waterway to be sealed or communicated, and the novel flow control pump is characterized in that the water outlet comprises a first water outlet (01) and a second water outlet (02), one of the water outlets is arranged on the pump head body (04), the other water outlet (02) is arranged on the valve cover (10), a switching structure connected with the flow control assembly is arranged in the water outlet cavity (06), and the flow control assembly drives the switching structure to control the connection or sealing of a water path between the water outlet cavity (06) and the first water outlet (01) and the second water outlet (02) respectively.

2. The novel flow control pump with the waterway switching structure is characterized in that the flow control assembly comprises a control rod (11), a reset spring (12), an induction diaphragm (13) and a diaphragm pressing plate (14), the upper end of the control rod (11) penetrates through the diaphragm pressing plate (14) to be connected, the periphery of the induction diaphragm (13) is hermetically fixed between a pump head body (04) and a valve cover (10), an atmosphere cavity (15) is formed between the induction diaphragm (13) and the valve cover (10), and an atmosphere hole (16) for communicating the atmosphere cavity (15) is formed in the valve cover (10); the side wall of the control rod (11) is provided with a flow limiting groove (17); a first sealing ring (21), a supporting sleeve ring (22) and a second sealing ring (23) which are positioned below the flow limiting groove (17) are sequentially arranged on the control rod (11) in the circumferential direction, a water inlet groove (24) communicated with the water inlet (01) is formed in the supporting sleeve ring (22), a pressing sleeve ring (25) used for pressing the first sealing ring (21), the supporting sleeve ring (22) and the second sealing ring (23) is arranged on the inner bottom wall of the vacuum cavity (08), and a base plate (26) used for pressing the sensing diaphragm (13) is arranged in the middle of the sensing diaphragm; one end of a return spring (12) acts on a diaphragm pressing plate (14), the other end acts on the inner wall of a vacuum cavity (08), a control rod (11) forms a flow control assembly for sealing or communicating a water path between a water inlet (01) and the vacuum cavity (08) under the combined action of air pressure in an atmosphere cavity (15), pressure in the vacuum cavity (08) and the return spring (12), and the lower end or the upper end of the control rod (11) is connected with a switching structure.

3. The novel flow control pump with the water path switching structure is characterized in that the lower end of the control rod (11) is connected with the switching structure, the switching structure is a first switching rod (18), a water outlet flow channel (19) which is respectively communicated with the second water outlet (02) and the water outlet cavity (05) is arranged in the middle of the first switching rod (18) and the control rod (11), the periphery of the lower end of the first switching rod (18) is hermetically connected with the inner wall of the water outlet cavity (05) through a third sealing ring (20), and the first switching rod (18) moves up and down under the action of the control rod (11) to form the switching structure for controlling the communication or sealing of the water path between the water outlet cavity (05) and the first water outlet (01) and the second water outlet (02).

4. The novel flow control pump with the waterway switching structure according to claim 2, wherein the upper end of the control rod (11) is connected with the switching structure, the switching structure is provided as a second switching rod (27), a water passing groove (28) is provided on the side wall of the second switching rod (27), the periphery of the upper end of the second switching rod (27) is hermetically connected with the inner wall of the valve cover (10) through a fourth sealing ring (29), the side surfaces of the pump head body (04) and the valve cover (10) are connected with a side cover (30), a first flow passage (31), a second flow passage (32) and a third flow passage (33) communicated with the water outlet cavity (05) are formed between the side cover (30) and the pump head body (04) and the valve cover (10), the first flow passage (31), the second flow passage (32) and the third flow passage (33) are sequentially communicated, and the second switching rod (27) moves up and down under the action of the control rod (11) to control the third flow passage (33) to be respectively connected with the first water outlet (01), And a switching structure for switching the connection or sealing of the water path between the second water outlets (02).

5. The novel flow control pump with the waterway switching structure is characterized in that a fifth sealing ring (34) is pressed on the end face, in contact with the pump head body (04) and the valve cover (10), of the side cover (30).

6. The water purifying and drinking system formed by the novel flow control pump with the water path switching structure is characterized by further comprising a purifying unit (40), a heating/refrigerating unit (41), a water faucet (42) and a control panel (43), wherein the purifying unit (40) is connected with a water inlet pipe, the water outlet end of the purifying unit (40) is connected with a water inlet (07) of the flow control pump (44), a first water outlet (01) of the flow control pump (44) is connected with the water faucet (42) through a three-way joint, a second water outlet (02) of the flow control pump (44) is connected with the water inlet end of the heating/refrigerating unit (41), and the water outlet end of the heating/refrigerating unit (41) is connected with the water faucet (42) through the three-way joint.

Background

With the development of economy, more and more household water purifying and drinking machines enter thousands of households.

In the existing household water purifying and drinking machine systems, the water purifying and drinking machine systems are mostly divided into normal-temperature water and refrigerating or heating water paths, and two water paths are divided through a water outlet of a water supply pump, as shown in fig. 6, the water paths are respectively a normal-temperature water path and a refrigerating or heating water path, electromagnetic valves are respectively installed on the corresponding water paths, and the opening of the electromagnetic valves is controlled through a control panel, so that the water outlet of a water tap can be controlled according to the requirements; in the system, more complex pipeline distribution and more control parts are needed to realize the functions of the system, so that the process cost of the whole system is higher, the structure of the system is complex, and the failure rate is higher.

Disclosure of Invention

The invention aims to provide a novel flow control pump with a water path switching structure and a clean drinking system formed by the same, which are used for simplifying the water path structure of the clean drinking system, reducing the using quantity of related control parts, reducing the overall process cost of the system and lowering the failure rate.

In order to solve the technical problem, the invention adopts the following scheme:

the utility model provides a novel accuse flow pump with water route switching structure, includes pump head body and pump cover, be equipped with the intake antrum in the pump head body, pressure boost chamber, play water cavity, vacuum cavity go out the water cavity and switch on with the delivery port, the intake antrum switches on with the water inlet, and the vacuum cavity loops through the runner that intakes, the one-way structure of intaking and switches on with pressure boost chamber, and pressure boost chamber switches on with play water cavity through the one-way structure that goes out water, be equipped with the accuse that this water route of control is sealed or switches on the water route of intake antrum, vacuum cavity switch on and flow the subassembly, the delivery port includes first delivery port and second delivery port, and first delivery port setting is on the pump head body, and the second delivery port is established on the valve cover, goes out the intracavity and is equipped with the switching structure of accuse and flows the subassembly and is connected, and the accuse flows the subassembly and drives switching structure control and goes out the water cavity and switch on or seal with the water route between first delivery port, the second delivery port respectively.

Compared with the prior art, the water supply pump in the existing water purification drinking system only has one water outlet end, two water ways are required to be connected to the water faucet from the water outlet end, and corresponding electromagnetic valve control components are arranged on different water ways, so that the water way structure of the water purification drinking system is more complex, the control components are more, the flow control pump in the invention is characterized in that a first water outlet is arranged on a pump body, a second water outlet is arranged on a valve cover, one water outlet can be used as a water supply inlet of hot water, the other water outlet can be used as a water supply inlet of cold water, when the flow control pump does not work, the flow control component controls the water way seal between a water inlet cavity and a vacuum cavity, when the flow control pump works, a pressurizing cavity is extruded under the driving of a motor, so that water flow or air in the vacuum cavity is sucked away to form a certain vacuum degree, at the moment, the flow control component controls the conduction of the water way between the water inlet cavity and the vacuum cavity, and the flow size after the conduction is related to the vacuum degree in the vacuum cavity, the higher the vacuum degree is, the larger the conducted flow is, the smaller the vacuum degree is, the smaller the conducted flow is, the vacuum degree in the vacuum cavity when the flow control pump works can be adjusted by adjusting the working voltage (power) of the flow control pump, the output flow when the flow control pump works can be adjusted by adjusting the working voltage (power) of the flow control pump, the action of the flow control assembly enables the switching structure to change the conduction or sealing state of the water outlet cavity with the first water outlet and the second water outlet, the working voltage of the flow control pump is provided with a set value, when the working voltage is smaller than the set value, the water outlet cavity is sealed with the first water outlet and is conducted with the second water outlet, when the voltage is increased to exceed the set value, the water outlet cavity is communicated with the first water outlet and is sealed with the second water outlet, therefore, the water outlet of different water outlets can be adjusted by adjusting the working voltage of the flow control pump, and the water outlet is applied to a clean drinking system, the water path structure can be simplified, the application quantity of control parts on the corresponding water paths can be reduced, the process cost is reduced, the fault rate of the whole clean water system is correspondingly reduced, and the control structure is simpler.

Preferably, the flow control assembly comprises a control rod, a return spring, an induction diaphragm and a diaphragm pressing plate, the upper end of the control rod penetrates through the diaphragm pressing plate to be connected, the periphery of the induction diaphragm is hermetically fixed between the pump head body and the valve cover, an atmospheric cavity is formed between the induction diaphragm and the valve cover, an atmospheric hole for communicating the atmospheric cavity is formed in the valve cover, and a flow limiting groove is formed in the side wall of the control rod; the control rod circumference is equipped with the first sealing washer that is located the current-limiting groove below in proper order, the support lantern ring, the second sealing washer, be equipped with on the support lantern ring and put through the intake chamber with the water inlet, be equipped with on the diapire in the vacuum chamber and be used for compressing tightly first sealing washer, the support lantern ring, the pressing ring of second sealing washer, response diaphragm middle part is equipped with the backing plate that compresses tightly it, reset spring one end acts on the diaphragm clamp plate, the other end acts on the vacuum chamber inner wall, the control rod is at atmospheric pressure in the atmospheric cavity, the vacuum chamber internal pressure, reset spring's combined action down constitutes sealed or switch on the accuse subassembly in water route between water inlet and the vacuum chamber, control rod lower extreme or upper end and switching structure are connected.

By adopting the technical scheme, when the flow control pump does not work, the sum of the acting force of the pressure in the vacuum cavity and the elastic force of the return spring on the induction diaphragm is larger than the acting force of the air pressure in the atmospheric cavity on the induction diaphragm, and the control rod seals the water channel between the water inlet tank and the vacuum cavity under the combined action of the acting forces; when the flow control pump works, water flow or air in the vacuum cavity is sucked away to form a certain vacuum degree, at the moment, the sum of the acting force of the pressure in the vacuum cavity and the elastic force of the return spring on the induction diaphragm is smaller than the acting force of the air pressure in the atmosphere cavity on the induction diaphragm, the control rod moves downwards (in the direction of the water inlet cavity) under the combined action of the acting forces, the side wall of the control rod is provided with a flow limiting groove, namely the lower end of the control rod is not provided with the flow limiting groove, the side wall above the lower end and below the diaphragm pressing plate is provided with the flow limiting groove, the part without the flow limiting groove at the lower end of the control rod completely moves downwards to the upper end of the water inlet groove, and when the control rod continues to move downwards, the water inlet is communicated with the vacuum cavity through the flow limiting groove at the moment. When the flow limiting groove of the control rod just moves downwards to the upper end of the water inlet groove, the flow channel of the water inlet communicated with the vacuum cavity through the flow limiting groove is small, the flow rate pumped by the flow control pump is small, if the control rod continues to move downwards, the part of the control rod with the flow limiting groove moves downwards to exceed the lower end of the water inlet groove, the area of the flow channel of the water inlet communicated with the vacuum cavity through the flow limiting groove is increased, and the flow rate pumped by the flow control pump is increased. Therefore, the vacuum in the vacuum cavity can be adjusted by adjusting the working voltage (power) of the flow control pump, so that the downward moving distance of the control rod is adjusted, and the function of adjusting the output flow of the flow control pump is achieved.

Preferably, the lower end of the control rod is connected with the switching structure, the switching structure is a first switching rod, a water outlet flow channel which is respectively communicated with the second water outlet and the water outlet cavity is arranged between the first switching rod and the control rod, the periphery of the lower end of the first switching rod is hermetically connected with the inner wall of the water outlet cavity through a third sealing ring, and the first switching rod moves up and down under the action of the control rod to form the switching structure which controls the communication or sealing of a water channel between the water outlet cavity and the first water outlet and the water channel between the water outlet cavity and the second water outlet.

By adopting the technical scheme, when the working voltage of the flow control pump is lower than a set value, the part of the first switching rod with the third sealing ring is positioned below the bottom surface of the first water outlet, at the moment, the water path between the water outlet cavity and the first water outlet is blocked, the water outlet cavity is communicated with the second water outlet through the water outlet flow channel, the control rod drives the first switching rod to move downwards along with the increase of the working voltage, when the lower end of the first switching rod, namely the water inlet end part of the water inlet flow channel is contacted with the water outlet one-way structure, the water inlet flow channel is sealed by the water outlet one-way structure, the water path between the water outlet cavity and the second water outlet is blocked, at the moment, the part of the first switching rod with the third sealing ring leaves the sealed matching cavity channel and completely enters the water inlet cavity, and the water outlet cavity is communicated with the first water outlet due to the fact that the water passing area of the water inlet cavity is larger than the water passing area of the cavity channel, when the control rod moves upwards and drives the lower end of the first switching rod to be separated from the water outlet one-way structure, the water outlet cavity is communicated with the second water outlet, the part, provided with the third sealing ring, of the first switching rod is just positioned in the matched cavity channel, the water channel between the water outlet cavity and the first water outlet is blocked, the control rod can move up and down by adjusting the voltage of the flow control pump, and then the first switching rod moves up and down to form a switching structure for controlling the connection or sealing of the water channel between the water outlet cavity and the first water outlet and the water channel between the water outlet cavity and the second water outlet respectively.

Preferably, the upper end of the control rod is connected with the switching structure, the switching structure is provided with a second switching rod, a water passing groove is formed in the side wall of the second switching rod, the periphery of the upper end of the second switching rod is hermetically connected with the inner wall of the valve cover through a fourth sealing ring, side covers are connected to the side faces of the pump head body and the side cover, a first flow passage, a second flow passage and a third flow passage which are communicated with the water outlet cavity are formed between the side covers and the pump head body and between the side covers and the valve cover, the first flow passage, the second flow passage and the third flow passage are sequentially communicated, and the second switching rod moves up and down under the action of the control rod to form a switching structure for controlling the communication or sealing of a water path between the third flow passage and the first water outlet and the second water outlet respectively.

By adopting the technical scheme, when the working voltage of the flow control pump is lower than the set value and the part of the second switching rod with the fourth sealing ring is positioned above the top surface of the third flow channel when the flow control pump works, so that the water path between the third flow channel and the first water outlet is blocked, at the moment, the third flow channel is communicated with the second water outlet through the water passing groove, the control rod continuously moves downwards along with the increase of the voltage of the flow control pump, when the part of the second switch rod with the fourth sealing ring moves downwards to the lower part of the top surface of the third flow passage, meanwhile, the top of the water passing groove is positioned below the bottom surface of the third flow channel, the third flow channel is communicated with the first water outlet, and the third flow channel is blocked from the second water outlet, so that the control rod moves up and down by adjusting the voltage of the flow control pump, and then the second switching rod moves up and down to form a switching structure for controlling the connection or sealing of the water channel between the third flow channel and the first water outlet and the second water outlet respectively.

Preferably, a fifth sealing ring is pressed on the end face of the side cover, which is in contact with the pump head body and the valve cover.

The water purifying and drinking system comprises the novel flow control pump with the water path switching structure, and further comprises a purifying unit, a heating/refrigerating unit, a faucet and a control panel, wherein the purifying unit is connected with a water inlet pipe, the water outlet end of the purifying unit is connected with the water inlet of the flow control pump, the first water outlet of the flow control pump is connected with the faucet through a three-way joint, the second water outlet of the flow control pump is connected with the water inlet end of the heating/refrigerating unit, and the water outlet end of the heating/refrigerating unit is connected with the faucet through the three-way joint. The flow control pump is applied to the water purification system, the flow control pump is provided with two water outlets due to the structure of the flow control pump, and only the two water outlets are required to be respectively connected to the water faucet, and water paths of different water outlets can be controlled by the flow control pump to respectively serve as cold water and hot water pipelines.

The invention has the following beneficial effects:

1. the flow control pump is applied to the water purification system, the flow control pump is provided with two water outlets due to the structure, and the water paths of different water outlets can be controlled by the flow control pump only by connecting the two water outlets to the water faucet respectively.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of C-C in FIG. 1;

FIG. 3 is a schematic structural view of example 4;

FIG. 4 is a schematic diagram of D-D of FIG. 3;

FIG. 5 is a schematic structural view of example 5;

fig. 6 is a structural diagram of a conventional clean drink system.

Reference numerals: 01-first water outlet, 02-second water outlet, 03-pressurizing cavity, 04-pump head body, 05-water inlet cavity, 06-water outlet cavity, 07-water inlet, 08-vacuum cavity, 09-water inlet flow channel, 10-valve cover, 11-control rod, 12-reset spring, 13-inductive diaphragm, 14-diaphragm pressure plate, 15-atmospheric cavity, 16-atmospheric hole, 17-flow-limiting groove, 18-first switching rod, 19-water outlet flow channel, 20-third sealing ring, 21-first sealing ring, 22-supporting lantern ring, 23-second sealing ring, 24-water inlet groove, 25-pressing lantern ring, 26-backing plate, 27-second switching rod, 28-water passing groove, 29-fourth sealing ring, 30-side cover, 31-a first flow passage, 32-a second flow passage, 33-a third flow passage, 34-a fifth sealing ring, 35-a water outlet one-way diaphragm, 36-a water inlet one-way diaphragm, 37-a sixth sealing ring, 38-a fixing plate, 39-a water inlet end part, 40-a purification unit, 41-a heating/refrigerating unit, 42-a water faucet, 43-a control panel, 44-a flow control pump, 45-a first electromagnetic valve, 46-a second electromagnetic valve, 47-a water supply pump and 48-a seventh sealing ring.

Detailed Description

The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited to these examples.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", and the like indicate orientations or positional relationships that are based on the orientations or positional relationships shown in the drawings, or that are conventionally placed when the product of the present invention is used, and are used only for convenience in describing and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus should not be construed as limiting the invention.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed," "open," "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-2, a novel flow control pump 44 with a waterway switching structure comprises a pump head body 04 and a pump cover hermetically connected to the pump head body 04, wherein a water inlet cavity 05, a pressurizing cavity 03, a water outlet cavity 06 and a vacuum cavity 08 are arranged in the pump head body 04, the water outlet cavity 06 is communicated with a water outlet, the water inlet cavity 05 is communicated with a water inlet 07, the vacuum cavity 08 is communicated with the pressurizing cavity 03 through a water inlet flow channel 09 and a water inlet one-way structure in sequence, the pressurizing cavity 03 is communicated with the water outlet cavity 06 through a water outlet one-way structure, a waterway communicated with the water inlet cavity 05 and the vacuum cavity 08 is provided with a flow control assembly for controlling the waterway to be sealed or communicated, the water outlet comprises a first water outlet 01 and a second water outlet 02, the first water outlet 01 is horizontally arranged on the pump head body 04, the second water outlet 02 is vertically arranged on the valve cover 10, the water outlet cavity 06 is internally provided with a switching structure connected with the flow control assembly, the flow control assembly drives the switching structure to control the connection or sealing of the water paths between the water outlet cavity 06 and the first water outlet 01 and the second water outlet 02 respectively.

In the flow control pump 44 of the invention, a first water outlet 01 is arranged on a pump head body 04, a second water outlet 02 is arranged on a valve cover 10, one water outlet can be used as a water supply port of normal temperature water, the other water outlet can be used as a water supply port of hot water or cold water, when the flow control pump 44 does not work, a water path between a water inlet cavity 05 and a vacuum cavity 08 is controlled by a flow control assembly to be sealed, when the flow control pump 44 works, a pressurizing cavity 03 is extruded under the driving of a motor, so that water flow or air in the vacuum cavity 08 is sucked away to form a certain vacuum degree, at the moment, the flow control assembly controls the water path between the water inlet cavity 05 and the vacuum cavity 08 to be conducted, the flow rate after conduction is related to the vacuum degree in the vacuum cavity 08, the flow rate after conduction is larger when the vacuum degree is higher, the flow rate after conduction is smaller when the vacuum degree is smaller, and the working voltage (power) of the flow control pump 44 can be adjusted to adjust the vacuum degree in the vacuum cavity 08 when the flow control pump 44 works, the output flow of the flow control pump 44 can be adjusted by adjusting the working voltage (power) of the flow control pump 44 when working, the action of the flow control assembly enables the switching structure to change the conduction or sealing state of the water outlet cavity 06 and the first water outlet 01 and the second water outlet 02, the working voltage of the flow control pump 44 is provided with a set value, when the working voltage is smaller than the set value, the water outlet cavity 06 is sealed with the first water outlet 01 and is communicated with the second water outlet 02, when the voltage is increased to exceed the set value, the water outlet cavity 06 is communicated with the first water outlet 01 and is sealed with the second water outlet 02, thus, by adjusting the working voltage of the flow control pump 44, different water outlets can be adjusted to be applied to a clean drinking system, the water path structure can be simplified, the application number of control components on the corresponding water path can be reduced, the process cost is reduced, and the fault rate of the whole clean drinking system is correspondingly reduced, the control structure is also simpler.

Example 2

As shown in fig. 1 and 3, the flow control assembly includes a control rod 11, a return spring 12, an inductive diaphragm 13, and a diaphragm pressing plate 14, the upper end of the control rod 11 penetrates through the diaphragm pressing plate 14 to be connected, the periphery of the inductive diaphragm 13 is hermetically fixed between the pump head body 04 and the valve cover 10, an atmospheric cavity 15 is formed between the inductive diaphragm 13 and the valve cover 10, an atmospheric hole 16 for communicating the atmospheric cavity 15 is formed on the valve cover 10, and a flow limiting groove 17 is formed on the side wall of the control rod 11; the control rod 11 is sequentially provided with a first sealing ring 21, a supporting sleeve ring 22 and a second sealing ring 23 which are positioned below the flow limiting groove 17 in the circumferential direction, the supporting sleeve ring 22 is provided with a water inlet groove 24 communicated with the water inlet 07, the inner bottom wall of the vacuum cavity 08 is provided with a pressing sleeve ring 25 used for pressing the first sealing ring 21, the supporting sleeve ring 22 and the second sealing ring 23, the middle part of the sensing diaphragm 13 is provided with a backing plate 26 for pressing the sensing diaphragm, one end of a return spring 12 acts on a diaphragm pressing plate 14, the other end of the return spring acts on the inner wall of the vacuum cavity 08, the control rod 11 forms a flow control assembly for sealing or communicating a water path between the water inlet 07 and the vacuum cavity 08 under the combined action of the air pressure in the atmospheric cavity 15, the pressure in the vacuum cavity 08 and the return spring 12, and the lower end or the upper end of the control rod 11 is connected with a switching structure.

When the flow control pump 44 does not work, the sum of the acting force of the pressure in the vacuum cavity 08 and the elastic force of the return spring 12 on the induction diaphragm 13 is larger than the acting force of the air pressure in the atmosphere cavity 15 on the induction diaphragm 13, and the control rod 11 seals a water channel between the water inlet groove 24 and the vacuum cavity 08 under the combined action of the acting forces; when the flow control pump 44 works, water flow or air in the vacuum cavity 08 is sucked away to form a certain vacuum degree, at this time, the sum of acting forces of the pressure in the vacuum cavity 08 and the elastic force of the return spring 12 on the sensing diaphragm 13 is smaller than the acting force of the pressure in the atmosphere cavity 15 on the sensing diaphragm 13, the control rod 11 moves downwards (in the direction of the water inlet cavity 05) under the combined action of the acting forces, the side wall of the control rod 11 is provided with the limited flow groove 17, namely the lower end of the control rod 11 is not provided with the limited flow groove 17, the side wall above the lower end and below the diaphragm pressing plate 14 is provided with the limited flow groove 17, the part of the lower end of the control rod 11 without the limited flow groove 17 completely moves downwards to the upper end of the water inlet groove 24, and when the water inlet 07 is communicated with the vacuum cavity 08 through the limited flow groove 17 when the control rod moves downwards continuously. When the flow limiting groove 17 of the control rod 11 just moves down to the upper end of the water inlet groove 24, the flow channel of the water inlet 07 communicated with the vacuum cavity 08 through the flow limiting groove 17 is small, the flow rate pumped by the flow control pump 44 is small, if the control rod 11 moves down continuously, the part of the control rod 11 with the flow limiting groove 17 moves down to exceed the lower end of the water inlet groove 24, the flow channel area of the water inlet 07 communicated with the vacuum cavity 08 through the flow limiting groove 17 is increased, and the flow rate pumped by the flow control pump 44 is increased. Therefore, by adjusting the operating voltage (power) of the controlled flow pump 44, the vacuum in the vacuum chamber 08 can be adjusted, and the distance that the control lever 11 is moved downward can be adjusted, thereby achieving a function of adjusting the output flow rate of the controlled flow pump 44.

Example 3

As shown in fig. 1-2, the lower end of the control rod 11 is connected to a switching structure, the switching structure is a first switching rod 18, a water outlet channel 19 connected to the second water outlet 02 and the water outlet cavity 06 is disposed in the middle of the first switching rod 18 and the control rod 11, the first switching rod 18 and the control rod 11 are integrally designed, the water outlet channel 19 simultaneously penetrates through the middle positions of the first switching rod 18 and the control rod 11, in this embodiment, the upper end of the control rod 11 extends above the diaphragm pressing plate 14, a slide way allowing the control rod 11 to slide is disposed in the valve cover 10, the slide way is communicated with the second water outlet 02, a cavity channel allowing the first switching rod 18 to slide is disposed in the pump head body 04, the cavity channel is matched with the sealing structure at the lower end of the control rod 11, the cavity channel is communicated with the water outlet cavity 06 and the first water outlet 01, the periphery of the lower end of the first switching rod 18 is sealed and connected with the inner wall of the cavity channel by a third sealing ring 20, the first switching rod 18 moves up and down under the action of the control rod 11 to form a switching structure for controlling the connection or sealing of the water path between the water outlet cavity 06 and the first water outlet 01 and the second water outlet 02 respectively.

In this embodiment, when the pump 44 is operated, and the operating voltage is lower than the set value, the portion of the first switching rod 18 having the third sealing ring 20 is located below the bottom surface of the first water outlet 01, and the lower end of the first switching rod 18 is located in the sliding channel thereof, at this time, the water channel between the water outlet cavity 06 and the first water outlet 01 is blocked, the water outlet cavity 06 and the second water outlet 02 are communicated through the water outlet channel 19, the control rod 11 drives the first switching rod 18 to move downward along with the increase of the operating voltage, when the lower end of the first switching rod 18, i.e., the water inlet end 39 of the water inlet channel 09 contacts the surface of the water outlet one-way membrane 35, the water inlet channel 09 is sealed by the water outlet one-way membrane 35, the water channel between the water outlet cavity 06 and the second water outlet 02 is blocked, at this time, the portion of the first switching rod 18 having the third sealing ring 20 leaves the sealed channel thereof and completely enters the water inlet cavity 05, because the water passing area of the water inlet cavity 05 is larger than the water passing area of the cavity, the water outlet cavity 06 is communicated with the first water outlet 01, when the voltage of the flow control pump 44 is reduced, the vacuum degree in the vacuum cavity 08 is reduced, so that the control rod 11 moves upwards and drives the lower end of the first switching rod 18 to be separated from the water outlet one-way structure, the water outlet cavity 06 is communicated with the second water outlet 02, at this time, the part of the first switching rod 18 with the third sealing ring 20 is just positioned in the matched cavity, and the water path between the water outlet cavity 06 and the first water outlet 01 is blocked, so that the control rod 11 moves up and down by adjusting the voltage of the flow control pump 44, and further the first switching rod 18 moves up and down to form a switching structure for controlling the connection or sealing of the water paths between the water outlet cavity 06 and the first water outlet 01 and the second water outlet 02 respectively.

Example 4

As shown in fig. 3-4, the upper end of the control rod 11 is connected to a switching structure, the switching structure is provided with a second switching rod 27, a water passing groove 28 is provided on the side wall of the second switching rod 27, the periphery of the upper end of the second switching rod 27 is hermetically connected to the inner wall of the inner channel of the valve cover 10 through a fourth sealing ring 29, the fourth sealing ring 29 is located above the water passing groove 28, the side surfaces of the pump head body 04 and the valve cover 10 are connected to a side cover 30, a first flow channel 31, a second flow channel 32 and a third flow channel 33 communicated with the water outlet cavity 06 are formed between the side cover 30 and the pump head body 04 and the valve cover 10, the first flow channel 31, the second flow channel 32 and the third flow channel 33 are sequentially communicated to form a U-shaped structure opening towards the right, the second switching rod 27 moves up and down under the action of the control rod 11 to form a switching structure for controlling the communication or sealing between the third flow channel 33 and the first water outlet 01 and the second water outlet 02, in this embodiment, the control rod 11 is circumferentially sleeved with a sixth sealing ring 37, and the sixth sealing ring 37 is pressed and fixed in a groove formed in the bottom surface of the valve cover 10 through a fixing plate 38, so as to prevent source water from leaking into the atmosphere cavity 15 from an installation gap between the control rod 11 and the valve cover 10.

In this embodiment, when the operating voltage of the flow control pump 44 is lower than the set value, the water path between the third flow path 33 and the first water outlet 01 is blocked when the portion of the second switching lever 27 having the fourth sealing ring 29 is located above the top surface of the third flow path 33, at this time, the third flow path 33 is connected to the second water outlet 02 through the water passing groove 28, the control lever 11 moves downward continuously as the voltage of the flow control pump 44 increases, and when the portion of the second switching lever 27 having the fourth sealing ring 29 moves downward below the top surface of the third flow path 33, the top of the water passing groove 28 is located below the bottom surface of the third flow path 33, the third flow path 33 is connected to the first water outlet 01, and the third flow path 33 is blocked from the second water outlet 02, so that the control lever 11 moves upward and downward by adjusting the voltage of the flow control pump 44, and the second switching lever 27 moves upward and downward to control the third flow path 33 to be connected to the first water outlet 01, the first water outlet, the second water outlet, and the second water outlet 33, And a switching structure for switching the connection or sealing of the waterway between the second water outlets 02.

And a fifth sealing ring 34 is pressed on the end surface of the side cover 30, which is contacted with the pump head body 04 and the valve cover 10.

The water outlet one-way structure is a water outlet one-way diaphragm 35, and the water inlet one-way structure is a water inlet one-way diaphragm 36.

Example 5

As shown in fig. 5, the drinking purification system formed by the above-mentioned novel flow control pump 44 with the water path switching structure further includes a purification unit 40, a heating/cooling unit 41, a faucet 42 and a control panel 43, wherein a hot water button and/or a cold water button, a normal temperature water button and a start/stop button may be disposed on the control panel for controlling the water outlet selection of the faucet 42, the water inlet end of the purification unit 40 is connected to the water inlet pipe, the water outlet end of the purification unit 40 is connected to the water inlet 07 of the flow control pump 44, the first water outlet 01 of the flow control pump 44 is connected to the faucet 42 through a three-way joint, the second water outlet 02 of the flow control pump 44 is connected to the water inlet end of the heating/cooling unit 41, and the water outlet end of the heating/cooling unit 41 is connected to the faucet 42 through a three-way joint. By applying the flow control pump 44 of the present invention to a water purification system, the flow control pump 44 has two water outlets due to its structure, and only needs to connect the two water outlets to the faucet 42, the water paths of different water outlets can be controlled by the flow control pump 44, compared with the existing water purification system, the present invention simplifies the pipeline distribution of the system, reduces the usage of electromagnetic valves, and simplifies the water path structure, thus the process cost is reduced, the structure of the system is simplified, and the failure rate is correspondingly reduced.

The working principle of the invention is as follows: when the flow control pump 44 works, the sum of the pressure in the vacuum cavity 08 and the acting force of the elastic force of the return spring 12 on the sensing diaphragm 13 is smaller than the acting force of the air pressure in the atmosphere cavity 15 on the sensing diaphragm 13, the control rod 11 moves downwards under the combined action of the acting forces, the control rod 11 drives the switching rod to move downwards, the on-off state among the first water outlet 01, the second water outlet 02 and the water outlet channel 19 is changed through the sealing ring structure at the lower end of the switching rod, so that the two water outlets are not conducted simultaneously, the flow control pump 44 is applied to a pure drinking system, the two water outlets are both connected with the water tap 42, the connecting pipeline of one water outlet is connected with the heating/refrigerating unit 41, the conduction of different water channels and the water tap 42 is controlled by controlling the voltage of the flow control pump 44, and the water channels of different water outlets can be controlled by the flow control pump 44, compared with the existing pure drinking system, the system saves a certain number of electromagnetic valves, and simultaneously simplifies the waterway structure, so that the process cost is reduced, the structure of the system is simplified, and the failure rate is correspondingly reduced.

The foregoing is only a preferred embodiment of the present invention, and the present invention is not limited thereto in any way, and any simple modification, equivalent replacement and improvement made to the above embodiment within the spirit and principle of the present invention still fall within the protection scope of the present invention.