CN111847684A

CN111847684A - Water purifying device

Info

Publication number: CN111847684A
Application number: CN201910354092.6A
Authority: CN
Inventors: 莫祖栋
Original assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Foshan Shunde Midea Water Dispenser Manufacturing Co Ltd
Priority date: 2019-04-29
Filing date: 2019-04-29
Publication date: 2020-10-30

Abstract

The invention discloses a water purifying device which comprises a filtering system and a water level control device, wherein the filtering system comprises a filter element assembly and a membrane filter element, the filter element assembly is connected with a water inlet pipe and the membrane filter element, the membrane filter element is connected with a waste water pipe and a pure water pipe, the water level control device is connected with the filter element assembly, the water level control device comprises a box body, a floating assembly and a valve body assembly, the floating assembly is arranged in the box body, and the floating assembly can be far away from or close to the valve body assembly under the condition that the water level in the box body is increased or reduced, so that the valve body assembly opens or closes the water inlet pipe. The valve body assembly can effectively open or close the water inlet pipe, so that the reliability of water closing of the water level control device when the water pressure is low is improved, the phenomenon that the waste water pipe drips for a long time is not easy to occur when the water purifying device is stopped, and then the water resource is not easy to waste.

Description

Water purifying device

Technical Field

The invention relates to the technical field of water purification, in particular to a water purification device.

Background

In the related technology, a pump-free electroless reverse osmosis water purifier generally adopts a four-side valve to control a waterway to run, tap water enters through a high-pressure end of the four-side valve, reverse osmosis pure water passes through a low-pressure end of the four-side valve, and the water entering is cut off or started through the increase or decrease of the pressure of the low-pressure end of the four-side valve, so that the water production and the shutdown of the whole machine are realized; the system adopting the four-side valve can not reliably close water when the tap water pressure is lower, and the phenomenon of long-time water dripping at the waste water port is easy to occur even when the system is shut down, so that water resources are wasted.

Disclosure of Invention

The invention needs to provide a water purifying device.

The water purifying device comprises a filtering system and a water level control device, wherein the filtering system comprises a filter element assembly and a membrane filter element, the filter element assembly is connected with a water inlet pipe and the membrane filter element, the membrane filter element is connected with a waste water pipe and a pure water pipe, the water level control device is connected with the filter element assembly, the water level control device comprises a box body, a floating assembly and a valve body assembly, the floating assembly is arranged in the box body, and the floating assembly can be far away from or close to the valve body assembly under the condition that the water level in the box body is increased or reduced, so that the valve body assembly opens or closes the water inlet pipe.

Among the foretell purifier, the inlet tube can effectively be opened or closed to the valve body subassembly, has improved water level control device like this and has closed the reliability of water when water pressure is lower, also is difficult for appearing the waste pipe phenomenon of dripping for a long time when making purifier shut down, is difficult to waste the water resource then.

In some embodiments, the filter element assembly comprises a first-stage filter element and a second-stage filter element, the valve body assembly is disposed between the first-stage filter element and the second-stage filter element, and the first-stage filter element is connected with the valve body assembly and the water inlet pipe.

In some embodiments, the primary filter element comprises a coarse filter element, the secondary filter element comprises an activated carbon filter element and a fine filter element, and the activated carbon filter element is disposed between the coarse filter element and the fine filter element.

In some embodiments, the water purifying device comprises a water storage cup, the water storage cup is connected with the pure water pipe, and the water storage cup is connected with the box body.

In some embodiments, the water purification device comprises a one-way valve and an activated carbon filter element, the one-way valve connects the activated carbon filter element and the membrane filter element, and the activated carbon filter element connects the pure water pipe.

In some embodiments, the water purifying device includes a magnetic guiding sealing element, the floating assembly includes a magnetic element, the valve assembly includes a valve body and a valve plate, the valve body is provided with a valve cavity, a passage opening, a water inlet and a water outlet, the valve plate is disposed in the valve cavity, the water inlet is communicated with the water inlet pipe, the water outlet is connected with the membrane filter element, the passage opening can be communicated or disconnected with the water inlet and the water outlet, the magnetic element can be far away from or close to the guiding sealing element under the condition that the water level in the box body rises or falls, so that the guiding sealing element moves in the valve cavity to open or close the passage opening.

In some embodiments, the valve body is provided with a pressure relief hole and a pressure boost hole, the pressure boost hole is communicated with the valve cavity and the water inlet, the water outlet is communicated with the pressure relief hole, the magnetic part is far away from the guide sealing part, the guide sealing part can move downwards and plug the pressure relief hole, so that the valve plate can plug the passage opening under the water pressure action of the water in the valve cavity to disconnect the water inlet and the water outlet, the guide sealing part can move upwards under the suction action of the magnetic part under the condition that the magnetic part is close to the guide sealing part, and the valve plate can open the passage opening under the water pressure action of the water in the valve cavity to communicate the water inlet and the water outlet.

In some embodiments, the water level control device includes an elastic member elastically abutting against the guide sealing member, the guide sealing member is located between the elastic member and the valve plate, the guide sealing member can move downward and block the pressure relief hole under the elastic force of the elastic member when the magnetic member is far away from the guide sealing member, and the guide sealing member can abut against the elastic member and move upward under the suction force of the magnetic member when the magnetic member is close to the guide sealing member.

In some embodiments, the water level control device includes a guide structure connecting the tank and the valve body, the guide structure extending at least partially into the tank, the elastic member disposed within the guide structure, and the guide seal disposed at least partially within the guide structure.

In some embodiments, the floating assembly includes a floating member, the floating member is connected to the magnetic member, the floating member can float up and down under the buoyancy of water, and the floating member can drive the magnetic member to be away from or close to the guide sealing member when the water level in the tank body rises or falls.

Additional aspects and advantages of embodiments of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.

Drawings

The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:

FIG. 1 is a schematic structural view of a water purifying apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural view of a water level control apparatus of a water purifying device according to an embodiment of the present invention;

Fig. 3 is another schematic structural view of a water level control apparatus of a water purification apparatus according to an embodiment of the present invention.

Description of the main element symbols:

a water purification device 100;

the filter system 10, the filter element assembly 11, the primary filter element 111, the secondary filter element 112, the first activated carbon filter element 1121, the fine filter element 1122, the membrane element 12, the water inlet pipe 13, the waste water pipe 14, the pure water pipe 15, the water level control device 20, the tank 21, the floating assembly 22, the magnetic member 221, the floating member 222, the valve body assembly 23, the valve body 231, the valve plate 232, the valve cavity 233, the passage opening 234, the water inlet 235, the water outlet 236, the pressure relief hole 237, the pressurization hole 238, the elastic member 24, the guide structure 25, the guide sleeve 251, the fixing portion 252, the water storage cup 30, the check valve 40, the second activated carbon filter element 50, the waste water ratio 60, the guide sealing member 70, the guide portion 71 and the sealing portion 72.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to 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", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting 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, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.

In the description of the present invention, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless otherwise explicitly stated or limited. Either mechanically or electrically. Either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Referring to fig. 1, a water purifying apparatus 100 according to an embodiment of the present invention is, for example, a pump-free electroless reverse osmosis water purifier. The water purifying apparatus 100 includes a filtering system 10 and a water level control device 20.

The filtration system 10 includes a cartridge assembly 11 and a membrane cartridge 12. The filter element assembly 11 is connected with a water inlet pipe 13 and a membrane filter element 12. The membrane filter element 12 is connected with a waste water pipe 14 and a pure water pipe 15. The filter element assembly 11 is used for filtering water entering from the water inlet pipe 13. The membrane cartridge 12 is used to further filter the water filtered through the cartridge module 11. Wherein, the membrane cartridge 12 may be a reverse osmosis membrane cartridge. Pure water generated after filtration through the membrane cartridge 12 can be discharged through the pure water pipe 15. The waste water produced after filtration through the membrane cartridge 12 can be discharged through a waste pipe 14. The outlet end of the waste pipe 14 may also be in communication with a waste tank (not shown) to facilitate collection of waste water, and waste water collected in the waste tank may be used for other purposes to avoid waste of water resources.

Referring to fig. 2 and 3, the water level control device 20 is connected to the filter cartridge assembly 11. The water level control apparatus 20 includes a tank 21, a float assembly 22, and a valve body assembly 23. The float assembly 22 is disposed within the tank 21. The float assembly 22 can move away from or close to the valve body assembly 23 in the event of an increase or decrease in the water level in the tank 21, causing the valve body assembly 23 to open or close the inlet pipe 13. In the present embodiment, the floating assembly 22 can be moved away from the valve body assembly 23 in case that the water level in the tank 21 is increased, so that the valve body assembly 23 closes the water inlet pipe 13, and the water purifying apparatus 100 stops purifying water. The floating assembly 22 can approach the valve body assembly 23 in case the water level in the tank 21 is lowered, so that the valve body assembly 23 opens the water inlet pipe 13, and the water purifying apparatus 100 starts purifying water. It should be noted that, in the case that the water level in the tank 21 rises, the floating assembly 22 is away from the valve body assembly 23, so that the valve body assembly 23 can close the water inlet pipe 13 under the action of an external force (e.g., water pressure). In the case where the water level in the tank 21 is lowered, the float assembly 22 approaches the valve body assembly 23, so that the valve body assembly 23 opens the inlet pipe 13 by an external force (e.g., water pressure).

It will be appreciated that in other embodiments the float assembly can be moved away from the valve body assembly in the event of an increase in the water level in the tank, causing the valve body assembly to open the water inlet pipe, at which point the water purification unit begins to purify water. The floating assembly can be close to the valve body assembly under the condition that the water level in the box body is reduced, so that the valve body assembly opens the water inlet pipe, and at the moment, the water purifying device stops purifying water. This can be set as the case may be.

In conclusion, the valve body assembly 23 can effectively open or close the water inlet pipe 13, which improves the reliability of the water level control device 20 for closing water when the water pressure is low, so that the water purification device 100 is not easy to drip water from the waste pipe 14 for a long time when stopped, and water resources are not easily wasted. In addition, the manner in which the valve body assembly 23 opens or closes the water inlet pipe 13 by the floating assembly 22 moving away from or close to the valve body assembly 23 in the event of the water level in the tank 21 rising or falling does not generate much noise like a four-sided valve.

In certain embodiments, the filter cartridge assembly 11 includes a primary filter cartridge 111 and a secondary filter cartridge 112. The valve body assembly 23 is disposed between the primary filter cartridge 111 and the secondary filter cartridge 112. The first-stage filter element 111 is connected to the valve assembly 23 and the inlet pipe 13. Therefore, water (such as tap water) entering from the water inlet pipe 13 is filtered by the first-stage filtering core 111 and then contacts the valve body assembly 23, so that the first-stage filtering core 111 has a certain protection effect on the valve body assembly 23. When the valve body assembly 23 opens the water inlet pipe 13, the water filtered by the first-stage filter element 111 is filtered by the second-stage filter element 112 and then enters the membrane filter element 12 for filtration, so as to improve the purification effect.

In certain embodiments, the primary filter cartridge 111 comprises a coarse filter cartridge. The secondary filter cartridge 112 includes a first activated carbon filter cartridge 1121 and a fine filter cartridge 1122. The first activated carbon filter element 1121 is disposed between the coarse filter element and the fine filter element 1122. Thus, the coarse filter element, the first activated carbon filter element 1121, and the fine filter element 1122 can constitute three-stage filtration, thereby improving the water purification effect. In this embodiment, the coarse filter element is a PP cotton coarse filter element. The fine filter element 1122 is a PP fine coarse filter element.

In some embodiments, the water purification apparatus 100 includes a water storage cup 30. The water storage cup 30 is connected with the pure water pipe 15. The water storage cup 30 is connected with the box body 21. In this manner, the water flowing out of the deionized water pipe 15 can be stored in the water storage cup 30, and the water stored in the water storage cup 30 can be introduced into the tank 21 to raise or lower the water level in the tank 21. Since the valve body assembly 23 opens or closes the water inlet pipe 13 without being affected by the water pressure of the water path of the filtering system 10, the water storage cup 30 can be set as an open type cup, so that the pure water producing efficiency of the water purifying device 100 is not easily reduced due to the rise of the water pressure in the water storage cup 30, and the user experience is improved.

In the present embodiment, the water purification apparatus 100 includes a check valve 40, a second activated carbon filter element 50, and a wastewater ratio 60. The check valve 40 connects the second activated carbon cartridge 50 and the membrane cartridge 12. The second activated carbon filter element 50 is connected with the pure water pipe 15. A waste water ratio of 60 is provided in waste 14. The second activated carbon filter element 50 serves as a post-filter element of the filter system 10, which further improves the water purification effect. The check valve 40 prevents reverse flow of water back into the membrane cartridge 12.

In some embodiments, the water purification apparatus 100 includes a guide seal 70 having magnetic properties. The floating assembly 22 includes a magnetic member 221. Valve body assembly 23 includes valve body 231 and valve plate 232. The valve body 231 is provided with a valve cavity 233, a passage opening 234, a water inlet 235 and a water outlet 236. The valve plate 232 is disposed in the valve cavity 233. The water inlet 235 is communicated with the water inlet pipe 13. The water outlet 236 is connected to the membrane cartridge 12. The passage opening 234 can connect or disconnect the water inlet 235 and the water outlet 236. The magnetic member 221 can move away from or close to the guide seal 70 in case the water level in the tank 21 rises or falls, so that the guide seal 70 moves in the valve chamber 233 to cause the valve sheet 232 to open or close the passage opening 234. In this embodiment, the magnetic member 221 is far away from the guide sealing member 70 when the water level in the tank 21 rises, so that the guide sealing member 70 is weakened by the attraction force of the magnetic member 221 and moves downward in the valve cavity 233 to force the valve plate 232 to close the passage opening 234, so as to close the water inlet pipe 13. When the water level in the tank 21 is lowered, the magnetic member 221 approaches the guide sealing member 70, so that the guide sealing member 70 receives an increased attraction force from the magnetic member 221 and moves upward in the valve chamber 233 to open the passage opening 234 of the valve sheet 232, thereby opening the water inlet pipe 13.

In some embodiments, the valve body 231 defines a pressure relief hole 237 and a pressure boost hole 238. The pressurizing hole 238 communicates with the valve chamber 233 and the water inlet 235. The water outlet 236 is communicated with a pressure relief hole 237. In the case that the magnetic member 221 is far from the guide sealing member 70, the guide sealing member 70 can move downward and block the pressure relief hole 237, so that the valve plate 232 can block the passage opening 234 under the water pressure of the water in the valve chamber 233 to disconnect the water inlet 235 and the water outlet 236. In the case that the magnetic member 221 is close to the guide sealing member 70, the guide sealing member 70 can move upward under the suction force of the magnetic member 221, so that the valve sheet 232 can open the passage opening 234 under the hydraulic pressure of the water in the valve chamber 233 to communicate the water inlet 235 with the water outlet 236.

In the present embodiment, the water level control apparatus 20 includes an elastic member 24. The resilient member 24 resiliently bears against the guide seal 70. Guide seal 70 is located between elastomeric member 24 and valve plate 232. In the case where the magnetic member 221 is far from the guide seal 70, the guide seal 70 can move downward and block the relief hole 237 by the elastic force of the elastic member 24, and in the case where the magnetic member 221 is close to the guide seal 70, the guide seal 70 can press the elastic member 24 and move upward by the attraction force of the magnetic member 221.

In certain embodiments, the float assembly 22 includes a float member 222. The floating member 222 is connected to the magnetic member 221. The float member 222 can float up and down by the buoyancy of water. The floating member 222 can bring the magnetic member 221 away from or close to the guide seal 70 in case the water level in the tank 21 rises or falls.

In the example of fig. 2 and 3, the tank 21 has a water receiving opening 210. External water (e.g., pure water from the water purifying apparatus 100) may enter the tank 21 through the water receiving port 210. When the water level in the tank 21 rises, the floating member 222 can float up under the buoyancy of the water in the tank 21 and drive the magnetic member 221 to move upward (as shown in fig. 3). When the water level in the tank 21 drops, the floating member 222 drops with the drop of the water level in the tank 21 and drives the magnetic member 221 to move downward (as shown in fig. 2). It should be noted that the shape and structure of the floating member 222 may be set according to specific situations, and is not limited to the hollow structure shown in fig. 2 and 3. The magnetic member 221 is, for example, a permanent magnet. In addition, water in the tank 21 can also flow out of the tank through the water receiving port 210, that is, the water receiving port 210 can be used as a water inlet or a water outlet.

In this embodiment, when the water level in the tank 21 rises, the floating member 222 can float up under the buoyancy of the water in the tank 21 and drive the magnetic member 221 to move upward to be away from the guide sealing member 70 (as shown in fig. 3), and can move downward until the attraction force between the magnetic member 221 and the guide sealing member 70 is lost, so that the guide sealing member 70, which is not attracted by the magnetic member 221, can move downward under the elastic force of the elastic member 24 and block the pressure release hole 237. Meanwhile, water entering from the water inlet 235 can enter the valve cavity 233 through the pressurizing hole 238, so that the pressure area of the upper surface of the valve plate 232 is larger than that of the lower surface of the valve plate 232, and then the valve plate 232 tightly presses the passage opening 234 under the action of water pressure to disconnect the water inlet 235 and the water outlet 236, and at this time, the water level control device 20 is equivalently in a disconnected state. When the water level in the tank 21 drops, the floating member 222 drops along with the drop of the water level in the tank 21 and drives the magnetic member 221 to move downward to be close to the guiding sealing member 70 (as shown in fig. 2), the guiding sealing member 70 can move upward against the pressure of the elastic member 24 under the action of the suction force of the magnetic member 221, at this time, the valve cavity 233 can communicate with the water outlet 236 through the pressure relief hole 237, so that the valve plate 232 opens the passage opening 234 under the action of the pressure of the inlet water to communicate the water inlet 235 with the water outlet 236, and at this time, the water level control device 20 is equivalently in an open state. Reciprocating in sequence, the water level control device 20 can mechanically realize automatic control of opening and closing of the water path.

Thus, the guiding sealing element 70 can effectively block the pressure relief hole 237, and the valve plate 232 can effectively block the channel opening 234, so that the reliability of water closing of the valve body 231 when the water pressure is low can be improved, and then the water resource is not easily wasted. In addition, the water level control device 20 can normally work without being electrified, has a simple structure, is reliable and durable, and can control the buoyancy required by closing the water channel of the water level control device 20 to be not influenced by the municipal water supply pressure, so that noise is not generated in the normal water passing process, and the user experience can be improved.

It is understood that, in order to improve the reliability of the valve sheet 232 in opening or closing the passage port 234, the relief hole 237 may be made larger in size than the pressure-increasing hole 238. Of course, the shapes of the pressure relief hole 237 and the pressure increasing hole 238 may be set according to the circumstances, and may be set to be circular or elliptical, for example.

In some embodiments, the water level control device 20 includes a guide structure 25. The guide structure 25 connects the case 21 and the valve body 231. The guide structure 25 extends at least partially into the tank 21. The resilient member 24 is disposed within the guide structure 25. The pilot seal 70 is at least partially disposed within the pilot structure 25. In the present embodiment, the elastic member 24 is a spring, one end of the elastic member 24 is fixed in the guide structure 25, and the other end of the elastic member 24 elastically abuts against the guide seal 70. The guide structure 25 has a guide function guide structure for guiding the movement of the sealing member 70.

In some embodiments, the guiding structure 25 includes a guide sleeve 251 and a fixing portion 252. The guide sleeve 251 extends at least partially into the housing 21. The elastic member 24 is disposed in the guide sleeve 251. The fixing portion 252 is fixed in the valve chamber 233. In the present embodiment, the fixing portion 252 is fitted into the valve chamber 233 to fix the position of the guide structure 25. The guide sleeve 251 is substantially cylindrical. The elastic member 24 is fixed in the guide sleeve 251. The guide sleeve 251 guides the movement of the guide seal 70.

In some embodiments, the float 222 is formed with a guide slot 123. The guide structure 25 extends at least partially into the guide groove 123. The magnetic member 221 surrounds the guide groove 123. In this embodiment, the floating member 222 is sleeved on the guide structure 25. The magnetic member 221 is fixed to the floating member 222. In the present embodiment, the guide sleeve 251 extends at least partially into the guide groove 123. The provision of the guide groove 123 improves the stability of the movement of the float assembly 12, since the position of the guide structure 25 is fixed.

In certain embodiments, the pilot seal 70 includes a pilot portion 71 and a seal portion 72. The guide portion 71 is connected to the seal portion 72. The guide portion 71 abuts against the elastic member 24. In the case where the magnetic member 221 is away from the guide seal 70, the seal portion 72 blocks the relief hole 237. In the present embodiment, the guide portion 71 has a substantially cylindrical shape, and the size of the seal portion 72 is smaller than that of the guide portion 71.

In certain embodiments, the seal 72 is T-shaped. Thus, the sealing effect of the sealing portion 72 is better.

It is understood that the sealing portion 72 may be made elastic in order to improve the sealing effect of the guide seal 70. In one example, the seal 72 is made of a rubber material.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other 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.

The above disclosure provides many different embodiments, or examples, for implementing different features of the invention. The components and arrangements of the specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present invention. Furthermore, the present invention may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed. In addition, the present invention provides examples of various specific processes and materials, but one of ordinary skill in the art may recognize applications of other processes and/or uses of other materials.

In the description of the present specification, reference to the description of the terms "one embodiment", "some embodiments", "an illustrative embodiment", "an example", "a specific example", or "some examples", etc., means that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A water purification device, characterized by comprising:

the filter system comprises a filter element assembly and a membrane filter element, wherein the filter element assembly is connected with a water inlet pipe and the membrane filter element, and the membrane filter element is connected with a waste water pipe and a pure water pipe;

The water level control device is connected with the filter element assembly, the water level control device comprises a box body, a floating assembly and a valve body assembly, the floating assembly is arranged in the box body, the floating assembly can be kept away from or close to the valve body assembly under the condition that the water level in the box body is increased or reduced, and the valve body assembly is opened or closed to the water inlet pipe.

2. The water purifying device of claim 1, wherein the filter element assembly comprises a primary filter element and a secondary filter element, the valve body assembly is disposed between the primary filter element and the secondary filter element, and the primary filter element is connected with the valve body assembly and the water inlet pipe.

3. The water purification device of claim 2, wherein the primary filter element comprises a coarse filter element, the secondary filter element comprises an activated carbon filter element and a fine filter element, and the activated carbon filter element is disposed between the coarse filter element and the fine filter element.

4. The water purification device of claim 1, wherein the water purification device comprises a water storage cup, the water storage cup is connected with the pure water pipe, and the water storage cup is connected with the tank body.

5. The water purification device of claim 1, comprising a one-way valve and an activated carbon filter element, wherein the one-way valve is connected with the activated carbon filter element and the membrane filter element, and the activated carbon filter element is connected with the pure water pipe.

6. The water purifying device of claim 1, wherein the water purifying device comprises a magnetic guiding sealing member, the floating assembly comprises a magnetic member, the valve assembly comprises a valve body and a valve plate, the valve body is provided with a valve cavity, a passage opening, a water inlet and a water outlet, the valve plate is disposed in the valve cavity, the water inlet is communicated with the water inlet pipe, the water outlet is connected with the membrane filter element, and the passage opening can be communicated with or disconnected from the water inlet and the water outlet;

the magnetic part can be far away from or close to the guide sealing part under the condition that the water level in the box body is increased or reduced, so that the guide sealing part moves in the valve cavity to enable the valve plate to open or close the passage opening.

7. The water purifying device of claim 6, wherein the valve body has a pressure relief hole and a pressure boost hole, the pressure boost hole is connected to the valve chamber and the water inlet, the water outlet is connected to the pressure relief hole, the guiding sealing member can move downward and block the pressure relief hole under the condition that the magnetic member is far away from the guiding sealing member, so that the valve plate can block the passage opening under the hydraulic pressure of the water in the valve chamber to disconnect the water inlet and the water outlet, and the guiding sealing member can move upward under the suction force of the magnetic member under the condition that the magnetic member is close to the guiding sealing member, so that the valve plate can open the passage opening under the hydraulic pressure of the water in the valve chamber to connect the water inlet and the water outlet.

8. The water purifying device of claim 7, wherein the water level control device comprises an elastic member elastically abutting against the guide sealing member, the guide sealing member is located between the elastic member and the valve plate, the guide sealing member can move downward and block the pressure relief hole under the elastic force of the elastic member when the magnetic member is far away from the guide sealing member, and the guide sealing member can abut against the elastic member and move upward under the suction force of the magnetic member when the magnetic member is close to the guide sealing member.

9. The water purification apparatus of claim 8, wherein the water level control device comprises a guide structure, the guide structure connects the tank and the valve body, the guide structure at least partially extends into the tank, the elastic member is disposed in the guide structure, and the guide sealing member is at least partially disposed in the guide structure.

10. The water purifying device of claim 6, wherein the floating assembly comprises a floating member, the floating member is connected with the magnetic member, the floating member can move up and down under the buoyancy of water, and the floating member can drive the magnetic member to be far away from or close to the guide sealing member under the condition that the water level in the tank body is increased or decreased.