1. A domestic water purification unit, its characterized in that, domestic water purification unit includes:

the water tank comprises a first water outlet and a first water inlet and can store water;

the single-channel desalting component comprises a second water inlet and a second water outlet, the water flowing in from the second water inlet is purified, and the treated water flows out from the second water outlet;

a piping system connecting the water tank and the single-channel desalination assembly, capable of transporting water in the water tank from the first water outlet to the second water inlet, and transporting water at the second water outlet to the water tank through the first water inlet;

wherein the pipe system comprises an outlet valve between the first outlet and the second inlet, the outlet valve being capable of sending out water from the tank.

2. The domestic water purification apparatus of claim 1, wherein said single-channel desalination assembly comprises a physisorption desalination cartridge and/or a chemisorption desalination cartridge.

3. The domestic water purification apparatus of claim 2, wherein said chemisorptive desalination cartridge comprises at least one of an ion exchange resin cartridge, a bipolar membrane electrodeionization cartridge;

the physical adsorption desalination filter element comprises at least one of a capacitance desalination filter element and a membrane capacitance desalination filter element.

4. The domestic water purification apparatus of claim 1, wherein said conduit system comprises a drive assembly positioned between said first water outlet and said water outlet valve, said drive assembly driving water in said tank to flow to said single-channel desalination assembly and/or out through said water outlet valve.

5. The domestic water purification device of claim 4, wherein said piping system comprises a pre-filter assembly located between said first water outlet and said water outlet valve, said pre-filter assembly comprising a PP cotton filter element and/or an activated carbon filter element.

6. The domestic water purification device of claim 4, further comprising a control assembly, wherein a conductivity detection assembly is disposed on the water tank and/or the pipe system, and the control assembly is connected to the conductivity detection assembly and the driving assembly;

the control component obtains conductivity data of water from the conductivity detection component, and when the conductivity data does not reach the target conductivity, the drive component is controlled to drive the water in the water tank to flow to the single-channel desalination component, so that the single-channel desalination component carries out purification treatment on the water flowing in from the second water inlet, and the treated water flows out of the water tank through the second water outlet.

7. The domestic water purification apparatus of claim 6, wherein said control assembly stops controlling said drive assembly to drive water in said water tank to said single-channel desalination assembly when said conductivity data reaches a target conductivity.

8. The domestic water purification apparatus of claim 7, wherein said control assembly comprises an input device, said control assembly controlling said outlet valve to open to allow water in said tank to exit when said input device detects an outlet control operation and said conductivity data reaches a target conductivity.

9. The domestic water purification apparatus of any one of claims 1-8, wherein the single channel desalination module is configured to purify water flowing therethrough when powered in the first direction; when the single-channel desalination assembly is powered in a second direction opposite to the first direction, the flowing water cleans the single-channel desalination assembly; or

The single-channel desalination assembly includes a housing and a filter element removably received within an interior of the housing.

10. The domestic water purification apparatus of any one of claims 1-8, wherein said outlet valve comprises a three-way valve that is switchable to allow water in said tank to be delivered to said second inlet port or to an external container.

11. The domestic water purification device of any one of claims 1-8, wherein said outlet valve is connected to a plurality of outlet pipes in the direction of outlet of water, and at least one of said outlet pipes is provided with a heating unit.

Background

Along with the progress of society, the living standard of people is improved, and people pay more and more attention to the sanitation of self diet drinking water. At present, tap water is usually treated by a chlorination method, so that water-borne diseases can be effectively prevented, but the tap water contains salt, impurities, residual chlorine and the like, does not have conditions for direct drinking, and needs to be purified before drinking.

In the prior art, a reverse osmosis membrane is often used to purify tap water to prepare pure water which can be directly drunk. The reverse osmosis membrane can effectively prevent substances such as bacteria, viruses, water scales, salt ions and the like and only allows water molecules to pass through, thereby ensuring the safety of water. During the treatment process, substances such as bacteria, viruses, scale, salt ions and the like which do not pass through the reverse osmosis membrane form concentrated water to be discharged. The prior common reverse osmosis membrane generates more concentrated water during purification and is not high in water utilization rate.

Disclosure of Invention

The embodiment of the application provides a domestic purifier, adopts the desalination subassembly of single current way to carry out the water purification, and the water that gets into single current way desalination subassembly can be followed the delivery port and discharged, obtains purification treatment simultaneously, does not produce waste water at this in-process, has improved the utilization ratio of water.

The application provides a domestic purifier, domestic purifier includes:

the water tank comprises a first water outlet and a first water inlet and can store water;

the single-channel desalting component comprises a second water inlet and a second water outlet, the water flowing in from the second water inlet is purified, and the treated water flows out from the second water outlet;

a piping system connecting the water tank and the single-channel desalination assembly, capable of transporting water in the water tank from the first water outlet to the second water inlet, and transporting water at the second water outlet to the water tank through the first water inlet;

wherein the pipe system comprises an outlet valve between the first outlet and the second inlet, the outlet valve being capable of sending out water from the tank.

Illustratively, the single-channel desalination assembly comprises a physisorption desalination cartridge and/or a chemisorption desalination cartridge.

Illustratively, the chemisorptive desalination cartridge comprises at least one of an ion exchange resin cartridge, a bipolar membrane electrodeionization cartridge;

the physical adsorption desalination filter element comprises at least one of a capacitance desalination filter element and a membrane capacitance desalination filter element.

Illustratively, the conduit system includes a drive assembly positioned between the first water outlet and the water outlet valve, the drive assembly driving water in the tank to flow to the single-channel desalination assembly and/or out through the water outlet valve.

Illustratively, the piping system includes a pre-filter assembly between the first water outlet and the outlet valve, the pre-filter assembly including a PP cotton filter element and/or an activated carbon filter element.

Exemplarily, the household water purifying device further comprises a control component, a conductivity detection component is arranged on the water tank and/or the pipeline system, and the control component is connected to the conductivity detection component and the driving component;

the control component obtains conductivity data of water from the conductivity detection component, and when the conductivity data does not reach the target conductivity, the drive component is controlled to drive the water in the water tank to flow to the single-channel desalination component, so that the single-channel desalination component carries out purification treatment on the water flowing in from the second water inlet, and the treated water flows out of the water tank through the second water outlet.

Illustratively, the control assembly stops controlling the drive assembly to drive water in the tank to the single-channel desalination assembly when the conductivity data reaches a target conductivity.

Illustratively, the control assembly includes an input device that controls the outlet valve to open to allow water in the tank to be delivered when the input device detects an outlet control operation and the conductivity data reaches a target conductivity.

Illustratively, when the single-channel desalination assembly is powered in a first direction, the single-channel desalination assembly purifies water flowing through the single-channel desalination assembly; the single channel desalination assembly is powered in a second direction opposite the first direction, and the water flows through to wash the single channel desalination assembly.

Illustratively, the single-channel desalination assembly includes a housing and a filter element removably received within an interior of the housing.

Illustratively, the outlet valve comprises a three-way valve, and the three-way valve can enable the water in the water tank to be conveyed to the second inlet or to an external container when switched.

Illustratively, the water outlet valve is connected with a plurality of water outlet pipelines in the water outlet direction, and at least one water outlet pipeline is provided with a heating unit.

The application discloses domestic purifier includes: the water tank comprises a first water outlet and a first water inlet and can store water; the single-channel desalting component comprises a second water inlet and a second water outlet, the water flowing in from the second water inlet is purified, and the treated water flows out from the second water outlet; a piping system connecting the water tank and the single-channel desalination assembly, capable of transporting water in the water tank from the first water outlet to the second water inlet, and transporting water at the second water outlet to the water tank through the first water inlet; the pipeline system comprises a water outlet valve positioned between the first water outlet and the second water inlet, and the water outlet valve can send out water in the water tank. The water flowing through the single-channel desalting component is purified through the single-channel desalting component, so that no waste water is discharged, the water entering the single-channel desalting component can be discharged from the water outlet, and meanwhile, the water is purified, no waste water is generated in the process, and the utilization rate of the water is improved; and the flow rate of the effluent can not be limited by the single-channel desalting component, and the flow rate of the effluent can be larger, so that a user is prevented from waiting for a long time when receiving water.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a household water purifying device according to an embodiment of the present application;

FIG. 2 is a schematic diagram of a bipolar membrane electrodeionization cartridge desalination process;

FIG. 3 is a schematic diagram of the bipolar membrane electrodeionization filter regeneration process;

fig. 4 is a schematic structural diagram of an embodiment of a household water purifying device.

Reference numerals: 100. a water tank; 110. a first water outlet; 120. a first water inlet; 200. a single-channel desalination assembly; 210. a second water inlet; 220. a second water outlet; 300. a piping system; 310. a water outlet valve; 320. a drive assembly; 330. a pre-filter assembly; 10. a conductivity detection component;

900. a bipolar membrane electrodeionization filter element; 910. an electrode; 911. a first electrode; 912. a second electrode; 920. bipolar membrane; 921. a cation exchange membrane; 922. an anion exchange membrane.

Detailed Description

The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some, but not all, embodiments of the present application. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.

The flow diagrams depicted in the figures are merely illustrative and do not necessarily include all of the elements and operations/steps, nor do they necessarily have to be performed in the order depicted. For example, some operations/steps may be decomposed, combined or partially combined, so that the actual execution sequence may be changed according to the actual situation. In addition, although the division of the functional blocks is made in the device diagram, in some cases, it may be divided in blocks different from those in the device diagram.

The embodiment of the application provides a household water purifying device which can be a water purifier, such as a table-board type water purifying/drinking machine.

Some embodiments of the present application will be described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.

Fig. 1 is a schematic structural diagram of the household water purifying device in the embodiment.

Referring to fig. 1, the household water purifying apparatus includes a water tank 100, a single channel desalination module 200, and a piping system 300.

Wherein the water tank 100 includes a first water outlet 110 and a first water inlet 120, and is capable of storing water.

In some embodiments, the water tank 100 includes a transparent housing or a transparent window is provided on the housing, which facilitates a user to view the water quality, water level, etc. in the water tank 100.

In some embodiments, the water tank 100 includes a water injection port through which water to be purified may be added to the water tank 100. For example, the water filling port is connected with a tap water pipe. Illustratively, a liquid level meter is further provided in the water tank 100, and when the liquid level in the water tank 100 drops to a set value, a valve of a tap water pipe can be controlled to open to add water to a water filling port of the water tank 100.

Specifically, as shown in FIG. 1, single-channel desalination assembly 200 includes a second water inlet 210 and a second water outlet 220. The single-channel desalination assembly 200 can purify the water flowing in from the second water inlet 210 and the purified water flows out from the second water outlet 220.

As can be appreciated, the single-channel desalination assembly 200 uses only one water inlet and one water outlet for the purification of water flowing therethrough, and thus can be referred to as a single-channel desalination assembly.

In some embodiments, the single-channel desalination assembly 200 can, of course, also include other water inlets and/or outlets. For example, when the single-channel desalination assembly 200 is flushed and regenerated, the generated wastewater can be discharged through the water outlet. When the single-channel desalination assembly 200 is used to purify water flowing through, the water inlets and/or outlets other than the second water inlet 210 and the second water outlet 220 can be closed to form a single-channel structure.

The single channel desalination assembly 200 may not discharge wastewater when purifying water flowing therethrough. Through adopting the desalination subassembly of single current way to carry out the water purification, the water that gets into single current way desalination subassembly 200 can be followed the delivery port and discharged, obtains purification treatment simultaneously, does not produce waste water in this process, has improved the utilization ratio of water.

In some embodiments, the single-channel desalination assembly 200 comprises a physisorption desalination cartridge and/or a chemisorption desalination cartridge.

Illustratively, the chemisorptive desalination cartridge can include at least one of an ion exchange (IX) resin cartridge, a bipolar membrane (Biopolar, BP) desalination cartridge.

Exemplary, the physisorption desalination filter element may include at least one of a Capacitive Desalination (CDI) filter element, a Membrane Capacitive Desalination (MCDI) filter element.

Specifically, the capacitive desalination filter element, the membrane capacitive desalination filter element, the bipolar membrane electrodeionization filter element and the like can cause the directional migration of cations and anions when being electrified so as to realize the purification treatment of water, and the filter elements can be called as electrically driven desalination filter elements.

Specifically, as shown in fig. 2 and 3, a schematic diagram of a structure of a bipolar membrane electrodeionization filter cartridge 900 is shown.

As shown in fig. 2 and 3, the bipolar membrane electrodeionization filter cartridge 900 includes one or more pairs of electrodes 910, and at least one bipolar membrane 920 or a plurality of spaced-apart bipolar membranes 920 is disposed between at least one pair of electrodes 910. Wherein, bipolar membrane 920 includes cation exchange membrane 921 and anion exchange membrane 922, and cation exchange membrane 921 and anion exchange membrane 922 set up relatively, compound together. For example, the bipolar membrane 920 can be produced by a hot press molding method, a bonding molding method, a casting molding method, an anion and cation exchange radical method, an electrodeposition molding method, or the like. Specifically, there is no space between the cation exchange membrane 921 and the anion exchange membrane 922 on one bipolar membrane 920, for example, water does not pass between the cation exchange membrane 921 and the anion exchange membrane 922 on the same bipolar membrane 920 when flowing through the bipolar membrane electrodeionization filter cartridge 900.

As shown in fig. 2 and 3, the pair of electrodes 910 includes a first electrode 911 and a second electrode 912, wherein the first electrode 911 is disposed opposite to a cation exchange membrane 921 of the bipolar membrane 920 adjacent to the first electrode 911, and the second electrode 912 is disposed opposite to an anion exchange membrane 922 of the bipolar membrane 920 adjacent to the second electrode 912.

Fig. 2 is a schematic diagram showing the operation principle of the bipolar membrane electrodeionization filter element 900 in the process of purifying water. Here, the potential of the first electrode 911 is higher than that of the second electrode 912, that is, a voltage in a forward direction is applied between the first electrode 911 and the second electrode 912. At this time, anions such as chloride ions in the raw water to be purified move towards the first electrode 911, and replace OH < - > in the anion exchange membrane 922 in the direction of the first electrode 911, and the OH < - > enters the flow channel between the adjacent bipolar membranes 920; meanwhile, cations such as Na + in the raw water move towards the second electrode 912 to replace H + in the cation exchange membrane 921 in the direction of the second electrode 912, and the H + enters the flow channel; h + and OH-are subjected to neutralization reaction in the flow channel to generate water, so that the salt in the raw water is removed, and purified pure water flows out from the tail end of the flow channel.

As shown in fig. 3, when a voltage in the opposite direction is applied between the first electrode 911 and the second electrode 912, so that the potential of the first electrode 911 is lower than that of the second electrode 912, OH "and H + ions are generated on the surfaces of the cation exchange membrane 921 and the anion exchange membrane 922 of the bipolar membrane 920 under the action of an electric field, cations such as Na + inside the cation exchange membrane 921 are replaced by H + ions and move toward the first electrode 911 at a low potential, anions such as chloride ions in the anion exchange membrane 922 are replaced by OH" and move toward the second electrode 912 at a high potential, and the cations such as Na + and the anions such as chloride ions enter the flow channel and can be washed out by water flowing through the bipolar membrane electrodeionization filter 900. Therefore, when the power is off or reverse voltage is applied to the desalting filter cores such as the bipolar membrane electrodeionization filter core 900 and the like, cations such as Na < + >, anions such as chloride ions and the like adsorbed on the bipolar membrane 920 are released, so that salt substances in the desalting filter core can be washed out by water to realize regeneration; water carrying cations such as Na + and anions such as chloride ions can be called concentrated water.

Illustratively, domestic purifier still includes the power supply unit, and the power supply unit connects electric drive desalination filter core, for electric drive desalination filter core power supply.

In some embodiments, the voltage at which the power supply assembly supplies power to the electrically driven desalination filter element can be adjusted, and the desalination rate of the electrically driven desalination filter element changes as the voltage supplied by the power supply assembly is adjusted.

Specifically, as shown in FIG. 1, the piping system 300 connects the water tank 100 and the single channel desalination assembly 200, and is capable of delivering water from the water tank 100 to the second water inlet 210 of the single channel desalination assembly 200 from the first water outlet 110, and delivering water from the second water outlet 220 of the single channel desalination assembly 200 to the water tank 100 through the first water inlet 120.

Illustratively, the water in the water tank 100 is purified after passing through the single-channel desalination assembly 200 several times, and the water in the water tank 100 is increasingly clean, for example, the water is purified by the single-channel desalination assembly 200 several times, so that the water in the water tank 100 meets the requirement.

Specifically, as shown in FIG. 1, the piping system 300 includes a water outlet valve 310 located between the first water outlet 110 and the second water inlet 210, and the water outlet valve 310 is capable of sending out the water in the water tank 100.

For example, when the water valve is opened, the water stored in the water tank 100 can flow out through the water outlet valve 310, the flow rate of the outlet water can be unrestricted by the single channel desalination assembly 200, and the flow rate of the outlet water can be relatively large. The user can be avoided waiting for a long time when receiving water.

Illustratively, as shown in fig. 1, the outlet valve 310 may include a three-way valve, which is switched to allow the water in the water tank 100 to be delivered to the second water inlet 210 or to an external container.

Specifically, when the three-way valve allows the water in the water tank 100 to be delivered to the second water inlet 210, the single channel desalination assembly 200 can purify the water from the second water inlet 210; the single channel desalination assembly 200 can be shut down when the three-way valve allows water in the tank 100 to be delivered to an external vessel.

In some embodiments, as shown in FIG. 4, the piping system 300 includes a drive assembly 320 positioned between the first water outlet 110 and the water outlet valve 310, the drive assembly 320 driving water in the water tank 100 to flow to the single flow desalination assembly 200 and/or out through the water outlet valve 310.

Illustratively, the drive assembly 320 may comprise a self-primer pump. When the single-channel desalination assembly 200 is in operation, the drive assembly 320 drives water in the water tank 100 to flow to the single-channel desalination assembly 200; when the outlet valve 310 is opened, the driving assembly 320 drives the water in the water tank 100 to flow out through the outlet valve 310, so that the flow rate of the discharged water can be increased, and a user is prevented from waiting for a long time when receiving water.

In some embodiments, as shown in FIG. 4, the conduit system 300 includes a pre-filter assembly 330 positioned between the first outlet 110 and the outlet valve 310. The water entering the single-channel desalination module 200 is subjected to a purification treatment, such as removing particulate impurities, residual chlorine, etc., which may be contained in the water, reducing the workload and consumption of the single-channel desalination module 200, and prolonging the regeneration cycle and service life thereof. When the outlet valve 310 is discharging water, the pre-filter assembly 330 can further improve the quality of the discharged water.

Illustratively, the pre-filter assembly 330 may include a PP cotton filter element and/or an activated carbon filter element.

In some embodiments, as shown in fig. 4, the conductivity detection assembly 10 is provided on the water tank 100 and/or the piping system 300. The water quality of the water at the corresponding position can be detected by the conductivity detection assembly 10. For example, the TDS value is a water quality test indicator specifically set for purified water, and represents the total soluble solids content of water. The TDS value can reflect the water quality to a certain degree, and generally, the lower the TDS value is, the less soluble salts such as heavy metal ions in the water are, and the purer the water quality is.

Illustratively, the household water purifying device further comprises a control assembly, and the control assembly is connected to the conductivity detection assembly 10.

Illustratively, the control assembly obtains conductivity data of the water from the conductivity detection assembly 10 and activates the electrically driven desalination cartridge to purify the water in the water tank 100 when the conductivity data does not reach a target conductivity.

Illustratively, the control assembly is also coupled to the drive assembly 320.

Illustratively, the control module obtains the conductivity data of the water from the conductivity detection module 10, and controls the driving module 320 to drive the water in the water tank 100 to flow to the single-channel desalination module 200 when the conductivity data does not reach the target conductivity, so that the single-channel desalination module 200 performs the purification treatment on the water flowing in from the second water inlet 210, and the treated water flows out to the water tank 100 through the second water outlet 220.

Illustratively, in the process of purifying water, the salinity concentration in the water can be detected in real time by detecting the electrical conductivity of the water, and the desalination rate of the single-channel desalination assembly 200 can be adjusted by changing the voltage of the single-channel desalination assembly 200, so as to ensure the stability of the quality of the produced water.

In some embodiments, the control assembly stops controlling the drive assembly 320 to drive water in the water tank 100 to the single channel desalination assembly 200 when the conductivity data reaches the target conductivity.

For example, the target conductivity may be stored in the memory of the control component in advance, or the control component may determine the target conductivity according to a setting operation of a user. When the conductivity of the water reaches the target conductivity, the water can be determined to be sufficiently pure, for example, to meet drinking standards.

By adjusting the target conductivity, the single channel desalination assembly 200 can be controlled to purify the water in the water tank 100 to a corresponding water quality, which can be applied to a corresponding water usage situation.

In some embodiments, the control assembly includes an input device, which may include, for example, a button, knob, touch screen, microphone, and the like.

For example, the user may perform a setting operation of the target conductivity through the input device, and the control component may determine the target conductivity according to the setting operation of the user.

Illustratively, when the input device detects a water-out control operation, such as a user pressing a water-out button, or uttering a voice including a water-out command, it is determined whether the conductivity data detected by the conductivity detection assembly 10 reaches the target conductivity. When the conductivity data reaches the target conductivity, the control component may control the outlet valve 310 to open to allow water in the water tank 100 to be delivered for use by the user.

In some embodiments, the outlet direction of the outlet valve 310 may be further connected to a heating unit, for example, a heat exchanger. The heating unit may heat the water exiting the outlet valve 310 to provide the user with hot water at a desired temperature.

Illustratively, the outlet valve 310 is connected to a plurality of outlet pipes in the outlet direction, and at least one of the outlet pipes is provided with a heating unit.

In some embodiments, the single-channel desalination assembly 200 can include a housing and a filter element removably received within an interior of the housing. The filter element includes, for example, a physisorption desalination filter element and/or a chemisorption desalination filter element as previously described. The filter elements of the single-channel desalination assembly 200 can be removed and flushed as needed to regenerate the filter elements of the single-channel desalination assembly 200.

In some embodiments, the single channel desalination assembly 200 is powered in a first direction to purify water flowing therethrough; when the single-channel desalination assembly 200 is powered in a second direction opposite the first direction, the water flowing through cleans the single-channel desalination assembly 200.

Illustratively, the single-channel desalination assembly 200 can include a waste water discharge port. When needed, the power supply assembly can provide reverse voltage for the electrically driven desalination filter element, so that the filter element of the single-channel desalination assembly 200 can be washed and regenerated, and the generated wastewater can be discharged through the wastewater discharge port.

For example, when the duration that the water quality detected by the conductivity detection assembly 10 does not reach the target conductivity exceeds a preset time period, such as 24 hours, it may be determined that the single-channel desalination assembly 200 needs to be regenerated, for example, a corresponding prompt message may be output to a user, or a voltage in a reverse direction may be provided to the electrically-driven desalination filter element by the power supply assembly, so as to implement washing and regeneration of the filter element of the single-channel desalination assembly 200.

The domestic purifier that the above-mentioned embodiment of this specification provided includes: the water tank comprises a first water outlet and a first water inlet and can store water; the single-channel desalting component comprises a second water inlet and a second water outlet, the water flowing in from the second water inlet is purified, and the treated water flows out from the second water outlet; a piping system connecting the water tank and the single-channel desalination assembly, capable of transporting water in the water tank from the first water outlet to the second water inlet, and transporting water at the second water outlet to the water tank through the first water inlet; the pipeline system comprises a water outlet valve positioned between the first water outlet and the second water inlet, and the water outlet valve can send out water in the water tank. The water flowing through the single-channel desalting component is purified through the single-channel desalting component, so that no waste water is discharged, the water entering the single-channel desalting component can be discharged from the water outlet, and meanwhile, the water is purified, no waste water is generated in the process, and the utilization rate of the water is improved; and the flow rate of the effluent can not be limited by the single-channel desalting component, and the flow rate of the effluent can be larger, so that a user is prevented from waiting for a long time when receiving water.

In the description of the embodiments of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate orientations or positional relationships based on those shown in the drawings, and are only for convenience of describing the embodiments of the present invention and simplifying the description, but do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be construed as limiting the embodiments of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the embodiments of the present invention, "a plurality" means two or more unless specifically limited otherwise.

In the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," "fixed," and the like are to be construed broadly, e.g., as being fixedly connected, detachably connected, or integrated; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. Specific meanings of the above terms in the embodiments of the present invention can be understood by those of ordinary skill in the art according to specific situations.

In embodiments of the invention, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise the first and second features being in direct contact, or the first and second features being in contact, not directly, but via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

While the invention has been described with reference to specific embodiments, the scope of the invention is not limited thereto, and those skilled in the art can easily conceive various equivalent modifications or substitutions within the technical scope of the invention. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.