Water supply and drainage module and humidifier

Abstract

The water supply and drainage module comprises a shell, a water inlet assembly and a water drainage assembly, the shell is provided with an insertion part, the insertion part is used for being matched with an insertion opening of a water tank in an inserted mode, the water inlet assembly is arranged in the shell, the water outlet end of the water inlet assembly is arranged on the insertion part, and the water drainage assembly is arranged on the insertion part. The water inlet assembly is used for conveying external water into the water tank, the water drainage assembly is arranged in the shell, the water inlet end of the water drainage assembly is arranged on the insertion part, and the water drainage assembly is used for discharging residual water in the water tank out of the water tank. According to the water supply and drainage module, water can be automatically added to the humidifier, so that complexity and inconvenience of manual water adding in the prior art are avoided, modular design is achieved, when the water supply and drainage module is damaged, the water supply and drainage module can be directly overhauled or replaced, the situation that a water tank communication needs to be dismantled is avoided, and the water supply and drainage module is convenient to use. And the convenience of after-sales operation is provided.

Description

Technical Field

[0001] The utility model relates to the technical field of air humidification, and particularly to an upper and lower water module and a humidifier. Background Art

[0002] In recent years, as people's requirements for the quality of life have become higher and higher, the demand for small household appliances such as humidifiers for improving the living environment has also shown a gradually increasing trend. However, most of the existing humidifiers need to be filled with water manually, which causes inconvenience in the use of the humidifier. Secondly, the existing humidifiers also have problems such as easy blockage by scale and other impurities and high maintenance costs. Summary of the Utility Model

[0003] The utility model aims to solve at least one of the technical problems in the related art to a certain extent.

[0004] Therefore, an embodiment of the utility model provides an upper and lower water module, which can realize self-water filling of the humidifier, thus avoiding the cumbersome and inconvenience of manual water filling in the prior art. Secondly, modular design is also realized. When the upper and lower water module is damaged, it can be directly repaired or replaced, avoiding the situation where the water tank needs to be connected and removed, and providing convenience for after-sales operation.

[0005] An embodiment of the utility model also provides a humidifier including the above upper and lower water module.

[0006] The upper and lower water module of the embodiment of the utility model includes:

[0007] A housing, the housing is provided with a plugging part, and the plugging part is used for plugging and matching with the plug interface of the water tank;

[0008] An inlet water assembly, the inlet water assembly is arranged in the housing, the water outlet end of the inlet water assembly is arranged at the plugging part, and the inlet water assembly is used for conveying external water into the water tank;

[0009] A drainage assembly, the drainage assembly is arranged in the housing, the water inlet end of the drainage assembly is arranged at the plugging part, and the drainage assembly is used for discharging the residual water in the water tank out of the water tank.

[0010] In some embodiments, the housing is provided with a protruding part, the protruding part and the plugging part are located on different sides of the housing, and the water inlet end of the inlet water assembly and the water outlet end of the drainage assembly are both arranged at the protruding part.

[0011] In some embodiments, the housing is provided with a supporting part for supporting the housing, and the supporting part and the protruding part are arranged oppositely.

[0012] In some embodiments, a plurality of foot pads for contacting the ground are provided on the bottom side of the support portion, and the plurality of foot pads are arranged at intervals along the extending direction of the support portion;

[0013] And / or, sealing rings are provided at the water outlet end of the water inlet assembly and the water inlet end of the drainage assembly.

[0014] In some embodiments, the water supply and drainage module includes a housing, the housing is sleeved outside the housing body and is connected to the housing body through a fastener, the plugging portion is located outside the housing, an avoidance groove is provided on the housing, and the protruding portion is embedded in the avoidance groove.

[0015] In some embodiments, the housing body includes a first housing and a second housing that are spliced and fixed, a part of the first housing and a part of the second housing form the plugging portion, the protruding portion is provided on the first housing, and the support portion is provided on the second housing.

[0016] In some embodiments, the water inlet assembly includes:

[0017] A pressure reducing valve, the pressure reducing valve is connected to the water inlet end of the water inlet assembly;

[0018] A first control valve, the first control valve is connected downstream of the pressure reducing valve, and the first control valve closes to block the water supply from the water inlet assembly to the water tank when the water level in the water tank is higher than a first threshold.

[0019] In some embodiments, the drainage assembly includes:

[0020] A second control valve, the second control valve opens when the water level in the water tank is lower than a second threshold;

[0021] A water pump, the water pump is connected to the second control valve, and the water pump is used to start to drain the residual water in the water tank when the second control valve opens;

[0022] A water circuit board and a pipe interface, the water circuit board is installed between the water inlet end of the drainage assembly and the water pump, and the pipe interface is provided at the outlet end of the drainage assembly.

[0023] In some embodiments, the water supply and drainage module includes:

[0024] A control circuit board, the control circuit board is arranged in the housing body, and both the water inlet assembly and the drainage assembly are electrically connected to the control circuit board;

[0025] An electrical connector, the electrical connector is arranged outside the housing body, and the electrical connector is connected to the control circuit board through a wire passing through the housing body.

[0026] The humidifier according to an embodiment of the present utility model includes a water tank and the water supply and drainage module as described in any of the above embodiments. The water tank is provided with an insertion interface, and the insertion part is detachably inserted and assembled at the insertion interface.

[0027] In some embodiments, the humidifier includes a humidifier body, and the humidifier body is arranged above the water tank.

[0028] In some embodiments, the humidifier includes a cover body, and the cover body is detachably assembled to the water tank, and the cover body is used to block the insertion interface when the water supply and drainage module is removed.

[0029] In some embodiments, a sealing plug is arranged on the side surface of the cover body facing the insertion interface, and the sealing plug is used to seal the water inlet and the water outlet at the insertion interface.

[0030] Beneficial effects: The water supply and drainage module and the humidifier according to the embodiments of the present utility model. The water supply and drainage module can realize self-water addition to the humidifier, thus avoiding the tediousness and inconvenience of manual water addition in the prior art. Secondly, modular design is also realized. When the water supply and drainage module is damaged, the water supply and drainage module can be directly repaired or replaced, avoiding the situation where the water tank needs to be connected and removed, and providing convenience for after-sales operation. Description of the Drawings

[0031] Figure 1 is a three-dimensional schematic diagram of the overall structure of the water supply and drainage module according to an embodiment of the present utility model.

[0032] Figure 2 is an exploded view of the water supply and drainage module according to an embodiment of the present utility model.

[0033] Figure 3 is a front view of the water supply and drainage module according to an embodiment of the present utility model.

[0034] Figure 4 is a three-dimensional schematic diagram of the overall structure of the humidifier according to an embodiment of the present utility model.

[0035] Figure 5 is an exploded view of the humidifier according to an embodiment of the present utility model.

[0036] Figure 6 is a disassembled view of the box body, the cover body and the water supply and drainage module according to an embodiment of the present utility model.

[0037] Reference Signs:

[0038] 100 - Water supply and drainage module;

[0039] 1 - Housing; 11 - Insertion part; 12 - Protruding part; 13 - Support part; 14 - First shell; 15 - Second shell;

[0040] 2 - Water inlet assembly; 21 - Pressure reducing valve; 22 - First control valve; 23 - First inlet; 24 - First outlet;

[0041] 3 - Drainage assembly; 31 - Second control valve; 32 - Water pump; 33 - Water circuit board; 34 - Pipe interface; 35 - Second outlet; 36 - Second inlet;

[0042] 4 - Housing; 41 - Avoidance groove; 42 - Foot pad;

[0043] 5 - Fastener;

[0044] 6 - Sealing ring;

[0045] 7 - Control circuit board;

[0046] 8 - Electrical connector;

[0047] 200 - Water tank; 201 - Insertion interface;

[0048] 300 - Humidifier body;

[0049] 400 - Cover body; 401 - Sealing plug. Detailed implementation manners

[0050] The following details the embodiments of the present utility model, and the examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to explain the present utility model, and should not be construed as a limitation to the present utility model.

[0051] The water supply and drainage module 100 of the embodiments of the present utility model includes a housing 1, a water inlet assembly 2, and a drainage assembly 3.

[0052] The housing 1 is provided with a plugging portion 11, and the plugging portion 11 is used for plugging and mating with the insertion interface 201 of the water tank 200. For example, as Figure 1 shown, the housing 1 can generally be a square box - shaped structure, and the material of the housing 1 can be plastic, metal, etc. The plugging portion 11 can be integrally formed on the front side of the housing 1, and the plugging portion 11 as a whole can be a flat - square structure. The insertion interface 201 can be provided on the box wall of the water tank 200, and the insertion interface 201 can be a structure similar to a groove. During assembly, the plugging portion 11 can be directly inserted into the insertion interface 201.

[0053] The water inlet assembly 2 is arranged inside the housing 1, the water outlet end of the water inlet assembly 2 is arranged at the plugging portion 11, and the water inlet assembly 2 is used for delivering external water into the water tank 200. For example, as Figure 2As shown, the water inlet assembly 2 can be arranged inside the housing 1. The water inlet assembly 2 can include pipelines, valves, etc. The water inlet assembly 2 has an inlet and an outlet. Hereinafter, the inlet of the water inlet assembly 2 is referred to as the first inlet 23, and the outlet of the water inlet assembly 2 is referred to as the first outlet 24. Among them, the first inlet 23 can be arranged on the top side of the housing 1, and the first outlet 24 can be arranged on the front side of the insertion part 11;

[0054] The drain assembly 3 is arranged inside the housing 1. The water inlet end of the drain assembly 3 is arranged at the insertion part 11. The drain assembly 3 is used to drain the residual water in the water tank 200 out of the water tank 200. For example, as Figure 2 shown, the drain assembly 3 can be arranged inside the housing 1. The drain assembly 3 can also include structures such as pipelines and valves. The drain assembly 3 also has an inlet and an outlet. Hereinafter, the inlet of the drain assembly 3 is referred to as the second inlet 36, and the outlet of the drain assembly 3 is referred to as the second outlet 35. Among them, the second inlet 36 can be arranged on the front side of the insertion part 11, and the second outlet 35 can be arranged on the top side of the housing 1.

[0055] During assembly, the first inlet 23 of the water inlet assembly 2 can be connected to the indoor water supply pipe, the first outlet 24 of the water inlet assembly 2 can be connected to the water tank 200 of the humidifier, the first inlet 23 of the drain assembly 3 can be connected to the water tank 200 of the humidifier, and the second outlet 35 of the drain assembly 3 can be connected to the indoor drain pipe.

[0056] When water needs to be replenished in the water tank 200, the water inlet assembly 2 can be opened. At this time, the water in the indoor water supply pipe can be automatically pressed into the water inlet assembly 2 from the first inlet 23 under the action of water pressure, and then can be transported to the water tank 200 through the first outlet 24. When the residual water in the water tank 200 needs to be drained, the drain assembly 3 can be opened. At this time, the residual water in the water tank 200 can be discharged into the drain assembly 3 through the second inlet 36, and then can be transported to the indoor drain pipe through the second outlet 35.

[0057] The water supply and drainage module 100 of the embodiment of the present utility model can automatically realize the automatic water supply and drainage of the water of the humidifier. The whole process does not require manual operation, which provides the convenience of use. Secondly, the water supply and drainage module 100 realizes modular design. When the water supply and drainage module 100 is damaged, only the water supply and drainage module 100 needs to be removed, avoiding the situation that the water tank 200 needs to be removed together in the related art, which provides convenience for after-sales maintenance.

[0058] In some embodiments, the housing 1 is provided with a protruding part 12. The protruding part 12 and the insertion part 11 are located on different sides of the housing 1. The water inlet end of the water inlet assembly 2 and the water outlet end of the drain assembly 3 are both arranged at the protruding part 12.

[0059] For example, as Figures 1 to 3As shown, the protruding part 12 can be integrally formed on the top side of the housing 1. The protruding part 12 can be a columnar structure with a runway-shaped cross-section, and the protruding part 12 can extend along the up and down direction. Both the first inlet 23 and the second outlet 35 can be provided on the top side of the protruding part 12. Thus, the integration of the ports of the water inlet assembly 2 and the drainage assembly 3 can be realized, facilitating the subsequent connection of the external pipeline.

[0060] In some embodiments, the housing 1 is provided with a support part 13 for supporting the housing 1, and the support part 13 and the protruding part 12 are arranged oppositely. For example, as Figure 1 and Figure 2 shown, the support part 13 can be integrally formed on the bottom side of the housing 1. The support part 13 can also be a columnar structure with a runway-shaped cross-section, and the support part 13 can extend along the up and down direction. During use, the support part 13 can act as a leg, thereby lifting the plug-in part 11 to a height adapted to the socket of the water tank 200, facilitating the docking of the water supply and drainage module 100 and the water tank 200.

[0061] In some embodiments, a plurality of foot pads 42 for contacting the ground are provided on the bottom side of the support part 13, and the plurality of foot pads 42 are arranged at intervals along the extending direction of the support part 13. For example, as Figure 2 shown, there can be two foot pads 42, and the materials of both foot pads 42 can be rubber or the like. The extending direction of the support part 13 can be the left-right direction, and the two foot pads 42 can be arranged at intervals in the left-right direction. There can be jacks on the bottom side of the support part 13, and the foot pads 42 can be inserted and matched with the corresponding jacks one by one. The foot pads 42 can play roles such as anti-slip and shock absorption during use.

[0062] In some embodiments, sealing rings 6 are provided at the water outlet end of the water inlet assembly 2 and the water inlet end of the drainage assembly 3. For example, as Figure 2 shown, the sealing ring 6 can be circular ring-shaped, and the material of the sealing ring 6 can be rubber, silica gel or the like. Sealing rings 6 are provided at the ends of both the first outlet 24 and the second inlet 36. After the plug-in part 11 is inserted and matched with the socket of the water tank 200, the sealing ring 6 can be pressed and limited, thereby realizing the sealing of the docking of the two connection ports.

[0063] In some embodiments, the water supply and drainage module 100 includes a housing 4. The housing 4 is sleeved outside the housing 1 and is connected to the housing 1 through a fastener 5. The plug-in part 11 is located outside the housing 4. An avoidance groove 41 is provided on the housing 4, and the protruding part 12 is embedded in the avoidance groove 41.

[0064] For example, as Figure 2As shown, the outer shell 4 can generally be in the shape of a square box. The opening of the outer shell 4 can face the front side. The material of the outer shell 4 can be plastic, and the outer shell 4 can function as a decorative cover. During assembly, the outer shell 4 can be sleeved on the rear half of the housing 1, thereby enhancing the overall appearance and further enhancing the structural stability of the assembly.

[0065] As Figure 2 shown, the avoidance groove 41 can be provided on the top wall of the outer shell 4 and at the front edge position of the outer shell 4. After the housing 1 is inserted into the outer shell 4, a part of the protruding portion 12 can be embedded in the avoidance groove 41, thus facilitating the assembly of the outer shell 4 in place and avoiding interference between the protruding portion 12 and the outer shell 4.

[0066] As Figure 2 shown, the fastener 5 can be a long screw. There can be two fasteners 5, and the two fasteners 5 can be arranged in parallel at intervals in the left - right direction. After the outer shell 4 is sleeved on the outside of the housing 1, the fastener 5 can pass through the outer shell 4 and the housing 1 and connect and fix the two, thus ensuring the structural stability of the assembly. Secondly, the fastener 5 can also play a role in enhancing the overall structural strength.

[0067] In some embodiments, the housing 1 includes a first shell 14 and a second shell 15 that are spliced and fixed. A part of the first shell 14 and a part of the second shell 15 form the insertion part 11. The protruding part 12 is provided on the first shell 14, and the support part 13 is provided on the second shell 15.

[0068] For example, as shown in Figure 2, the housing 1 can be separately provided and includes two independent parts, which are the first shell 14 and the second shell 15 respectively. The first shell 14 can be located above the second shell 15. The first shell 14 and the second shell 15 can be assembled by means of bolt connection, snap - fixing, etc.

[0069] The above - mentioned insertion part 11 can be formed by splicing a part of the first shell 14 and a part of the second shell 15 in the up - down direction. The above - mentioned protruding part 12 can be integrally formed on the top side of the first shell 14 by injection molding, while the above - mentioned support part 13 can be integrally formed on the bottom side of the second shell 15 by injection molding.

[0070] The separate setting of the housing 1 facilitates the processing and production of the housing 1 on the one hand and also facilitates the installation of components such as the water inlet assembly 2 and the drain assembly 3 on the other hand.

[0071] In some embodiments, the water inlet assembly 2 includes a pressure reducing valve 21 and a first control valve 22. The pressure reducing valve 21 is connected to the water inlet end of the water inlet assembly 2. The first control valve 22 is connected downstream of the pressure reducing valve 21, and the first control valve 22 closes when the water level in the water tank 200 is higher than the first threshold to block the water supply from the water inlet assembly 2 to the water tank 200.

[0072] For example, as Figure 2 shown, the first control valve 22 can be an electromagnetic one-way valve. The first control valve 22 can be fixed in the housing 1 by screws or the like. The pressure reducing valve 21 can be connected above the first control valve 22, and the pressure reducing valve 21 can be connected between the first inlet 23 and the first control valve 22. The pressure reducing valve 21 can function to reduce the pressure of the tap water conveyed by the water pipe, thereby avoiding the situation that the water pressure damages the up and down water module 100.

[0073] A liquid level monitoring sensor or the like can be provided in the water tank 200. The liquid level monitoring sensor can monitor the water level height in the water tank 200. When the water level height in the water tank 200 is higher than the first threshold value, at this time, the corresponding controller or the like can control the first control valve 22 to close, thereby timely cutting off the connection between the tap water pipe and the water inlet assembly 2, and realizing the control of the replenished water volume in the water tank 200.

[0074] In some embodiments, the drainage assembly 3 includes a second control valve 31, a water pump 32, a water circuit board 33 and a pipe interface 34. The second control valve 31 is opened when the water level in the water tank 200 is lower than the second threshold value. The water pump 32 is connected to the second control valve 31, and the water pump 32 is used to start to drain the residual water in the water tank 200 when the second control valve 31 is opened. The water circuit board 33 is installed between the water inlet end of the drainage assembly 3 and the water pump 32, and the pipe interface 34 is provided at the outlet end of the drainage assembly 3.

[0075] For example, as Figure 2 shown, the second control valve 31 can also be an electromagnetic one-way valve. The second control valve 31 can be arranged side by side with the first control valve 22 and can be provided on the right side of the first control valve 22. The second inlet 36, the water circuit board 33, the water pump 32, and the second control valve 31 can be arranged in sequence along the front-to-back direction. The pipe interface 34 can be a water pipe quick interface. The pipe interface 34 can be connected to the top side of the water pump 32, and the setting of the pipe interface 34 facilitates the quick connection with the indoor sewer pipe.

[0076] When the above-mentioned liquid level monitoring sensor monitors that the water level in the water tank 200 is lower than the second threshold value, at this time, the corresponding controller can control the water pump 32 and the second control valve 31 to open. The pumping pressure generated by the water pump 32 can convey the residual water in the water tank 200 into the indoor sewer pipe, thereby avoiding the situation that impurities such as scale accumulated in the residual water participate in the water circuit circulation and pollute the water circuit, and achieving the effect of timely draining the residual water and precipitating impurities.

[0077] In some embodiments, the water supply and drainage module 100 includes a control circuit board 7 and an electrical connector 8. The control circuit board 7 is disposed inside the housing 1. Both the water inlet assembly 2 and the water drainage assembly 3 are electrically connected to the control circuit board 7. The electrical connector 8 is disposed outside the housing 1, and the electrical connector 8 is connected to the control circuit board 7 through a wire passing through the housing 1.

[0078] For example, as Figure 2 shown, the control circuit board 7 can be a PCB board. The control circuit board 7 can be installed inside the housing 1. The above-mentioned first control valve 22, second control valve 31, water pump 32, etc. can all be connected to the control circuit board 7. By means of the control circuit board 7, the opening and closing of the first control valve 22, second control valve 31, and water pump 32 can be realized.

[0079] The electrical connector 8 can be a plug. The electrical connector 8 can be connected to the control circuit board 7 through a wire. When in use, the electrical connector 8 can be connected to an external power supply, thereby playing a role in supplying power to the water supply and drainage module 100. As Figure 3 shown, a through hole can be provided on the front side of the second housing 15, and the wire of the electrical connector 8 can pass through the through hole.

[0080] Next, the humidifier according to the embodiments of the present invention will be described.

[0081] The humidifier according to the embodiments of the present invention includes a water tank 200 and a water supply and drainage module 100. The water supply and drainage module 100 can be the water supply and drainage module 100 described in any of the above embodiments. The water tank 200 is provided with a socket 201, and the plug-in part 11 is detachably plugged and assembled at the socket 201.

[0082] For example, as Figures 4 to 6 shown, the socket 201 can be provided on the rear side wall of the water tank 200. The socket 201 can be a groove structure. During assembly, the plug-in part 11 can be directly inserted into the socket 201, which is convenient for connection and fully ensures the structural compactness of the assembly.

[0083] In some embodiments, as Figure 4 and Figure 5 shown, the humidifier includes a humidifier body 300. The humidifier body 300 is disposed above the water tank 200. Since the water tank 200 needs to store water, the center of gravity of the humidifier can be lowered, thereby enhancing the structural stability of the humidifier.

[0084] In some embodiments, the humidifier includes a cover body 400. The cover body 400 is detachably assembled to the water tank 200, and the cover body 400 is used to block the socket 201 when the water supply and drainage module 100 is removed. For example, as Figure 6As shown, the cover body 400 can generally be square, and the cover body 400 can be assembled at the insertion interface 201 by means of a snap-fastener or other structure. When the up-and-down water module 100 needs to be repaired or when the up-and-down water module 100 is not needed, the cover body 400 can be installed at the insertion interface 201, thereby playing a role in blocking the insertion interface 201 and providing a protective function. Secondly, it can also enhance the overall appearance.

[0085] In some embodiments, a sealing plug 401 is provided on the side of the cover body 400 facing the insertion interface 201, and the sealing plug 401 is used to seal the water inlet and outlet at the insertion interface 201. For example, as Figure 6 shown, the insertion interface 201 can be provided with a water inlet and a water outlet for corresponding to the first outlet 24 and the second inlet 36 described above. Two sealing plugs 401 can be provided on the inner side of the cover body 400. The material of the sealing plug 401 can be rubber or the like, and the sealing plug 401 can be directly fixed on the inner side wall of the cover body 400.

[0086] When the cover body 400 is installed at the insertion interface 201 of the water tank 200, the two sealing plugs 401 can be respectively inserted into the water inlet and the water outlet in the insertion interface 201, thereby realizing the sealing of the water inlet and the water outlet, avoiding the leakage of the water level in the water tank 200, and ensuring the sealing performance of the water tank 200.

[0087] Although the above embodiments have been shown and described, it can be understood that the above embodiments are exemplary and should not be construed as limiting the present invention. Any changes, modifications, substitutions, and variations made by those of ordinary skill in the art to the above embodiments are within the protection scope of the present invention.

Claims

1. A water supply and drainage module, characterized in that: include: A housing, wherein the housing is provided with a plug-in portion, and the plug-in portion is used for plugging and matching with the plug interface of the water tank; A water inlet assembly, the water inlet assembly is arranged in the housing, the water outlet end of the water inlet assembly is arranged at the plug-in portion, and the water inlet assembly is used to transport external water into the water tank; A drainage component is disposed in the shell, a water inlet end of the drainage component is disposed at the plug-in portion, and the drainage component is used to drain residual water in the water tank out of the water tank.

2. The water supply and drainage module according to claim 1, characterized in that: The shell is provided with a protruding portion, the protruding portion and the plug-in portion are located on different sides of the shell, and the water inlet end of the water inlet component and the water outlet end of the drainage component are both arranged on the protruding portion.

3. The water up and down water module according to claim 2, characterized in that: The housing is provided with a supporting portion for supporting the housing, and the supporting portion and the protruding portion are arranged opposite to each other.

4. The water up and down water module according to claim 3, characterized in that: A plurality of foot pads for contacting the ground are provided on the bottom side of the support portion, and the plurality of foot pads are arranged at intervals along the extension direction of the support portion; And / or, the water outlet end of the water inlet assembly and the water inlet end of the drainage assembly are both provided with sealing rings.

5. The water up and down water module according to claim 3, characterized in that: It comprises an outer shell, which is sleeved on the outer side of the shell and connected to the shell through fasteners. The plug-in part is located outside the shell. The shell is provided with an avoidance groove, and the protrusion is embedded in the avoidance groove.

6. The water up and down water module according to claim 5, characterized in that: The shell includes a first shell and a second shell that are spliced ​​and fixed, a part of the first shell and a part of the second shell form the plug-in portion, the protrusion is arranged on the first shell, and the support portion is arranged on the second shell.

7. The water up and down water module according to claim 1, characterized in that: The water inlet assembly comprises: A pressure reducing valve, the pressure reducing valve is connected to the water inlet end of the water inlet assembly; A first control valve is connected to the downstream of the pressure reducing valve, and the first control valve is closed when the water level in the water tank is higher than a first threshold value to block the water supply from the water inlet assembly to the water tank.

8. The water supply and drainage module according to claim 1, characterized in that: The drainage assembly comprises: a second control valve, which opens when the water level in the water tank is lower than a second threshold; a water pump, the water pump being connected to the second control valve and being used to start when the second control valve is opened to discharge residual water in the water tank; A waterway plate and a pipe interface, wherein the waterway plate is installed between the water inlet end of the drainage component and the water pump, and the pipe interface is arranged at the outlet end of the drainage component.

9. The water up and down water module according to any one of claims 1 to 8, characterized in that: include: A control circuit board, wherein the control circuit board is disposed in the housing, and the water inlet assembly and the drainage assembly are both electrically connected to the control circuit board; An electrical connector is arranged on the outside of the shell and is connected to the control circuit board via a wire passing through the shell.

10. A humidifier, characterized in that: It comprises a water tank and an upper and lower water module as described in any one of claims 1 to 9, wherein the water tank is provided with a plug interface, and the plug-in part is detachably plugged and assembled at the plug interface.

11. The humidifier according to claim 10, characterized in that It comprises a humidifier body, which is arranged above the water tank.

12. The humidifier according to claim 10, characterized in that It includes a cover body, which is detachably assembled on the water tank and is used to seal the plug port when the upper and lower water modules are removed.

13. The humidifier according to claim 12, characterized in that A sealing plug is provided on the side of the cover body facing the plug port, and the sealing plug is used to seal the water inlet and the water outlet at the plug port.

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