Water storage device

Abstract

The utility model provides a water storage device which comprises a box body provided with a cavity, a water inlet and a water outlet, the water outlet is formed in the inner side wall of the box body, the water inlet and the water outlet are both communicated with the cavity, and the water inlet is located above the water outlet; the drain valve is arranged on the outer side of the box body and arranged on the side wall where the water outlet is located in a penetrating mode, and the drain valve is communicated with the water outlet so as to control on-off of the water outlet; the heating groove is formed in the inner side wall of the box body, the heating groove is located on the periphery of the water outlet, and an opening of the heating groove is communicated with the cavity. By means of the technical scheme, the problem that in the prior art, the communication position of the water collecting box and the drainage valve is prone to freezing can be solved.

Description

Technical Field

[0001] The utility model relates to the technical field of fuel cells, in particular to a water storage device. Background Art

[0002] Currently, the fuel cell stack is the core of a fuel cell system. It generates electricity through the electrochemical reaction of hydrogen and oxygen, which is then converted into stable electrical energy for external output through an energy conversion module. Fuel cell exhaust is a mixture of water and unreacted gases. After the fuel cell system is shut down, an anode purge is performed to remove any residual water vapor and liquid water.

[0003] In the prior art, when the fuel cell system is at a low ambient temperature and is shut down, there is condensed water inside. When the condensed water at the anode of the fuel cell system accumulates in the water collecting box, there is a risk of freezing between the drain valve and the water collecting box, which can easily cause the fuel cell system to operate abnormally or even shut down during the cold start process. Utility Model Content

[0004] The utility model provides a water storage device to solve the problem in the prior art that the connection between the water collecting box and the drain valve is prone to ice formation.

[0005] The utility model provides a water storage device, which includes: a box body, which has a cavity, a water inlet and a water outlet, the water outlet is arranged on the inner side wall of the box body, the water inlet and the water outlet are both communicated with the cavity, and the water inlet is located above the water outlet; a drain valve, which is arranged on the outside of the box body and penetrates the side wall where the water outlet is located, the drain valve is communicated with the water outlet to control the on and off of the water outlet; a heating tank, which is arranged on the inner side wall of the box body, the heating tank is located on the outer periphery of the water outlet, and the opening of the heating tank is communicated with the cavity.

[0006] Furthermore, the water outlet includes a connecting section and a drainage section. The connecting section is passed through the side wall of the box body. The connecting section is connected to the cavity and the drainage section respectively. Part of the drainage valve is located in the connecting section to control the connection and disconnection of the connecting section and the drainage section. The drainage section is connected to the outside world, and the connecting section extends upward at an angle from the direction close to the drainage valve.

[0007] Furthermore, the projection of the drain valve on the side wall of the box body is at least partially located within the projection range of the heating groove on the side wall of the box body, and the projection of the connecting section on the side wall of the box body is at least partially located within the projection range of the heating groove on the side wall of the box body.

[0008] Furthermore, an end of the bottom surface of the cavity close to the water outlet is higher than an end of the bottom surface away from the water outlet.

[0009] Furthermore, the bottom surface includes a first guide surface and a water collecting surface. The first guide surface is arranged close to the water outlet, and the height of the first guide surface gradually decreases in the direction away from the water outlet.

[0010] Furthermore, the bottom surface also includes a second guide surface, which is located between the first guide surface and the water collecting surface. The height of the second guide surface gradually decreases in the direction away from the water outlet, and the inclination angle of the first guide surface is smaller than the inclination angle of the second guide surface.

[0011] Furthermore, the water storage device also includes a filter assembly, which includes a mounting frame and a filter screen. The filter screen is located in the mounting frame, and the mounting frame is arranged on the box body and is located between the water inlet and the bottom surface. The filter screen is used to filter the fluid.

[0012] Furthermore, the mounting frame includes a support frame and a mounting plate. The filter is arranged in the support frame. A mounting hole is provided on the side wall of the box body. The mounting hole is connected to the cavity. The support frame passes through the mounting hole into the cavity. The mounting plate is located on the outside of the box body and is fixedly connected to the box body.

[0013] Furthermore, a mounting groove is provided on the inner side wall of the box body. The mounting groove is annularly arranged on the inner periphery of the box body, and the outer edge of the mounting frame is located in the mounting groove.

[0014] Furthermore, the water storage device also includes a liquid level sensor, which is arranged on the mounting plate and is electrically connected to the drain valve.

[0015] By applying the technical solution of the present invention, the drain valve is arranged on the outside of the box body and is penetrated on the side wall where the water outlet is located to control the on and off of the water outlet. A heating groove is arranged on the inner wall of the box body, and the heating groove is arranged on the periphery of the water outlet, and the opening of the heating groove is connected to the cavity. In this way, the side wall at the heating groove will become thinner, which is conducive to quickly transferring the heat in the box body to the water outlet on the side wall and the drain valve outside the side wall and heating them. Through the above arrangement, if there is ice at the drain valve and the water outlet at this time, when the fuel cell system is cold-started, the hydrogen on the anode of the stack will release heat during the oxidation reaction to produce liquid water with heat. After the liquid water flows into the cavity, it will gradually fill the heating groove, and then transfer the heat to the drain valve and the water outlet to accelerate the melting of residual ice, thereby ensuring the normal operation of the system. At the same time, there is no need to set up additional heating components or pipelines, avoiding the complexity of the device structure and reducing the cost of the device. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The drawings constituting part of this application are provided to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are provided to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0017] Figure 1 Shows a schematic structural diagram of the box body provided by the utility model;

[0018] Figure 2 Shows a schematic cross-sectional view of the box body provided by the utility model;

[0019] Figure 3 A schematic cross-sectional view of the water storage device provided by the present utility model is shown;

[0020] Figure 4 A schematic diagram showing the flow direction of liquid water in the box during the purge process provided by the present invention is shown;

[0021] Figure 5 A schematic diagram showing the flow direction of liquid water in the box body after the purge is completed provided by the present invention is shown;

[0022] Figure 6 An exploded structural diagram of the water storage device provided by the present invention is shown from a top view;

[0023] Figure 7 The exploded structure diagram of the water storage device provided by the utility model is shown from a bottom-up perspective.

[0024] The above drawings include the following reference numerals:

[0025] 10. Box body;

[0026] 11. Cavity; 12. Water inlet;

[0027] 13. Water outlet;

[0028] 131. Connecting section; 132. Drainage section;

[0029] 14. Bottom surface;

[0030] 141. First guide surface; 142. Water collection surface; 143. Second guide surface;

[0031] 15. Mounting hole;

[0032] 16. Mounting slot;

[0033] 17. First sealing groove; 18. Second sealing groove;

[0034] 20. Drain valve;

[0035] 30. Heating tank;

[0036] 41. Filter;

[0037] 42. Support frame; 43. Mounting plate;

[0038] 50. Liquid level sensor;

[0039] 61. First sealing member; 62. Second sealing member. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. The following description of at least one exemplary embodiment is actually only illustrative and is in no way intended to limit the present invention and its application or use. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0041] like Figures 1 to 3 As shown, an embodiment of the present invention provides a water storage device, comprising: a box body 10, a drain valve 20, and a heating tank 30. The box body 10 has a cavity 11, a water inlet 12, and a water outlet 13. The water outlet 13 is located on the inner sidewall of the box body 10. Both the water inlet 12 and the water outlet 13 are connected to the cavity 11, and the water inlet 12 is located above the water outlet 13. The drain valve 20 is located on the outside of the box body 10 and penetrates the sidewall where the water outlet 13 is located. The drain valve 20 is connected to the water outlet 13 to control the on / off of the water outlet 13. The heating tank 30 is located on the inner sidewall of the box body 10, located outside the water outlet 13, and the opening of the heating tank 30 is connected to the cavity 11. The drain valve 20 is fixed to the sidewall of the box body 10 by fasteners, which facilitates disassembly. The box body 10 is fixedly connected to the gas-liquid separator by fasteners.

[0042] Using the technical solution of the present invention, a drain valve 20 is disposed on the outside of the housing 10 and penetrates the sidewall where the water outlet 13 is located to control the opening and closing of the water outlet 13. A heating groove 30 is disposed on the inner sidewall of the housing 10, and the heating groove 30 is arranged around the water outlet 13, with the opening of the heating groove 30 communicating with the cavity. This thins the sidewall at the heating groove 30, facilitating rapid transfer of heat from the housing 10 to the water outlet 13 on the sidewall and the drain valve 20 outside the sidewall, thereby heating these areas. With this arrangement, if ice forms on the drain valve 20 and the water outlet 13, when the fuel cell system is cold-started, the oxidation reaction of hydrogen at the anode of the stack releases heat to produce heated liquid water. This liquid water flows into the cavity 11 and gradually fills the heating groove 30, transferring heat to the drain valve 20 and the water outlet 13 to accelerate the melting of any remaining ice, thereby ensuring the normal operation of the system. Furthermore, no additional heating components or piping are required, thus avoiding a complex device structure and reducing device costs.

[0043] In this embodiment, at least part of the heating tank 30, the drain valve 20 and the water outlet 13 can be located on the same side wall of the box body 10. There is no limitation on the specific positions of the heating tank 30, the drain valve 20 and the water outlet 13, as long as the heat of the liquid water can be transferred to the drain valve 20 and the water outlet 13 through the heating tank 30.

[0044] like Figure 2 and Figure 3 As shown, the water outlet 13 includes a connecting section 131 and a drain section 132. The connecting section 131 is provided through the side wall of the box body 10 and communicates with the cavity 11 and the drain section 132, respectively. A portion of the drain valve 20 is located within the connecting section 131 to control the connection between the connecting section 131 and the drain section 132. The drain section 132 is connected to the outside world and is located downstream of the connecting section 131. The drain valve 20 has a valve core. When drainage is not required, the drain valve 20 drives the internal valve core to insert into the connecting section 131 to seal it, thereby simultaneously blocking the connecting section 131 and the drain section 132. This integrated arrangement of the connecting section 131 and the drain section 132, controlled by a single drain valve 20, results in a simple structure and convenient operation.

[0045] The extension direction of the drainage section 132 is not limited. In the present application, the drainage section 132 extends in the vertical direction and is arranged below the drainage section 132. This can prevent the liquid water in the drainage section 132 from flowing back into the connecting section 131 and causing the risk of freezing.

[0046] Furthermore, the connecting section 131 extends upward at an angle from the direction near the drain valve 20. This allows liquid water to flow back from the connecting section 131 into the cavity 11 after drainage is complete, rather than remaining in the connecting section 131. This reduces the amount of liquid water that enters and remains in the drain valve 20. This arrangement significantly reduces the amount of liquid water remaining in the connecting section 131 and drain valve 20 during the drainage and anode purge phases, thereby reducing the risk and amount of ice formation in the connecting section 131 and drain valve 20.

[0047] In this embodiment, the type of drain valve 20 is not limited. It can be a check valve, a diaphragm valve, etc. In this embodiment, the drain valve 20 is configured as a solenoid valve, which has a fast response speed, a simple structure, and is easy to control, thereby improving control accuracy.

[0048] like Figure 2 and 3As shown, the projection of the drain valve 20 on the side wall of the box body 10 is at least partially located within the projection of the heating groove 30 on the side wall of the box body 10, and the projection of the connecting section 131 on the side wall of the box body 10 is at least partially located within the projection of the heating groove 30 on the side wall of the box body 10. This allows the heated liquid water to directly transfer the heat through the side wall to the corresponding parts of the drain valve 20 and the connecting section 131 for heating, shortening the heat transfer time and increasing the heat transfer speed, allowing the residual ice on the connecting section 131 and the drain valve 20 to melt more quickly.

[0049] Specifically, the end of the bottom surface 14 of the cavity 11 near the water outlet 13 is higher than the end of the bottom surface 14 away from the water outlet 13. This arrangement ensures that the amount of water stored on the side of the bottom surface 14 away from the water outlet 13 is greater than the amount of water stored on the side of the bottom surface 14 near the water outlet 13. This reduces the amount of water stored on the side of the bottom surface 14 near the water outlet 13, reduces the possibility and amount of liquid water entering the water outlet 13, and reduces the risk of ice formation at the connecting section 131 and the drain valve 20.

[0050] The specific structure of the bottom surface 14 is not limited, and the bottom surface 14 can be a curved structure, a bent structure, or a flat structure.

[0051] like Figure 2 and Figure 3 As shown, the bottom surface 14 includes a first guide surface 141 and a water collecting surface 142. The first guide surface 141 is arranged close to the water outlet 13, and the height of the first guide surface 141 gradually decreases in the direction away from the water outlet 13. Through the above arrangement, compared with other curved surface structures, the first guide surface is arranged as a flat structure, which can avoid liquid water from being stored on the first guide surface 141. The first guide surface 141 will guide the liquid water so that the liquid water flows into the water collecting surface as quickly as possible. At the same time, when draining, the liquid water can also flow into the water outlet 13 through the first guide surface 141. There is no water accumulation on the first guide surface 141 or a large resistance to the drainage of liquid water. Figure 4 and Figure 5 As shown, after drainage or purging is completed, the liquid water in the cavity 11 will first flow through the first guide surface 141 to the water collection surface 142 for collection and storage. The liquid water flowing back into the cavity 11 from the connecting section 131 will not accumulate at the end near the water outlet 13 and flow back to the connecting section 131. This further prevents the possibility of ice forming at the connecting section 131 and the drain valve 20. Furthermore, if the system shakes or tilts, the configuration of the present application can also reduce the amount of liquid water splashing onto the water outlet 13.

[0052] In the present application, the bottom surface 14 also includes a second guide surface 143. The second guide surface 143 is located between the first guide surface 141 and the water collecting surface 142. The height of the second guide surface 143 gradually decreases in the direction away from the water outlet 13. The inclination angle of the first guide surface 141 is smaller than the inclination angle of the second guide surface 143. Specifically, the inclination angle of the first guide surface 141 is the angle of the horizontal plane where the first guide surface 141 and the second guide surface 143 are connected, rotated clockwise to the first guide surface 141, and the inclination angle of the second guide surface 143 is the angle of the horizontal plane where the second guide surface 143 and the water collecting surface 142 are connected, rotated clockwise to the second guide surface 143. Compared with the second guide surface 143 being arranged perpendicular to the bottom surface 14 in the vertical direction, the solution of the present application can ensure that the water storage capacity of the water collecting surface 142 meets the demand. At the same time, if Figure 4 As shown, the second guide surface 143 can guide the liquid water during drainage, which can further reduce the resistance of the second guide surface 143 to the liquid water during drainage, speed up the drainage rate, and avoid a large amount of liquid water remaining in the cavity 11.

[0053] The connection between the first guide surface 141 , the second guide surface 143 and the water collecting surface 142 is a curved surface transition, which is convenient for processing and can further improve the guiding effect on liquid water.

[0054] like Figure 4 and Figure 5 As shown, the water storage device also includes a filter assembly, which includes a mounting frame and a filter screen 41. The filter screen 41 is located in the mounting frame, which is arranged on the box body 10 and is located between the water inlet 12 and the bottom surface 14. The filter screen 41 is arranged in the mounting frame to ensure the stability of the installation of the filter screen 41, and to prevent the fluid flow rate from being too fast and having too much impact on the filter screen, causing the filter screen to be damaged or falling into the liquid water below and affecting the normal operation of the box body 10. The filter screen 41 is used to filter the fluid. Through the above arrangement, the filter assembly can filter the fluid entering the cavity 11, and prevent impurities from entering the cavity 11 and clogging the drain valve. The direction indicated by the arrow is the flow direction of the fluid.

[0055] like Figure 6 and Figure 7As shown, the mounting frame includes a support frame 42 and a mounting plate 43. The filter 41 is mounted within the support frame 42. A mounting hole 15 is provided on the side wall of the housing 10. The mounting hole 15 communicates with the cavity 11. The support frame 42 extends through the mounting hole 15 into the cavity 11. The mounting plate 43 is located outside the housing 10 and is fixedly connected to the housing 10. The mounting plate 43 further enhances the fixing strength of the filter 41 on the housing 10. Furthermore, the support frame 42 can be inserted into or removed from the cavity 11 through the mounting hole 15. This allows the filter 41 to be replaced at any time if impurities accumulate or become damaged, without affecting the normal operation of the housing. Furthermore, the filter 41 is easily replaced, allowing filters 41 of different filtration levels to be used for different fluids. This greatly improves the ease of replacing the filter 41 and the applicability of the housing 10.

[0056] Specifically, openings are provided at both ends of the mounting plate 43, and corresponding through holes are provided on the side walls of the box body 10, and the through holes are protruding from the side walls, so that they will not interfere with the mounting holes 15. The mounting plate 43 can be fixed to the box body 10 by passing fasteners through the through holes and the openings.

[0057] like Figure 6 As shown, the inner wall of the box body 10 is provided with a mounting groove 16. The mounting groove 16 is annularly arranged around the inner periphery of the box body 10, and the outer edge of the mounting bracket is located within the mounting groove 16. The provision of the mounting groove 16 increases the contact area between the mounting bracket and the box body 10 and provides stable support for the support bracket, further enhancing the stability of the filter screen 41 in the cavity 11. The mounting groove 16 also provides a guide for the installation of the mounting bracket, thereby further improving the speed and convenience of the mounting bracket assembly.

[0058] Among them, such as Figure 6 and 7 As shown, the water storage device also includes a liquid level sensor 50, which is disposed on the mounting plate 43 and is electrically connected to the drain valve 20. Integrating the liquid level sensor 50 on the filter assembly facilitates installation. Compared to a dispersed installation, the solution of the present application can improve the integration of the components and facilitate subsequent maintenance and inspection. When the liquid level sensor 50 detects that the water level in the cavity 11 reaches a preset value, it can transmit an electrical signal to the drain valve 20. The drain valve 20 is a solenoid valve. After receiving the signal, it starts to drain the cavity 11, improving the convenience of drainage and enhancing the automation and intelligence of drainage.

[0059] In the present application, the liquid level sensor 50 is a non-contact sensor. Specifically, the liquid level sensor 50 is an infrared liquid level sensor.

[0060] like Figure 6 and Figure 7As shown, the water storage device further includes a first sealing member 61 and a second sealing member 62, both of which are disposed on the outside of the box body 10, with the first sealing member 61 being located between the drain valve 20 and the box body 10, and the second sealing member 62 being located between the mounting plate 43 and the box body 10. This arrangement ensures the tightness of the cavity 11, preventing liquid water from leaking from the drain valve 20 or the mounting plate 43 and affecting the water storage performance of the box body 10, thereby ensuring the normal operation of the box body 10.

[0061] The specific structures of the first sealing member 61 and the second sealing member 62 are not limited, and they can be configured as sealing strips, sealing rings, or sealing gaskets.

[0062] Specifically, if Figure 6 and Figure 7 As shown, a first sealing groove 17 and a second sealing groove 18 are also provided on the box body 10. The first sealing groove 17 is used to prevent the first sealing member 61, and the second sealing groove 18 is used to place the second sealing member 62. Such a setting can ensure the stability of the assembly of the first sealing member 61 and the second sealing member 62, thereby improving the sealing of the cavity 11.

[0063] It should be noted that the terms used herein are only for describing specific embodiments and are not intended to limit the exemplary embodiments according to the present application. As used herein, unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. In addition, it should be understood that when the terms "comprise" and / or "include" are used in this specification, they indicate the presence of features, steps, operations, devices, components and / or combinations thereof.

[0064] Unless otherwise specifically stated, the relative arrangement of the parts and steps, numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention. At the same time, it should be understood that, for ease of description, the sizes of the various parts shown in the accompanying drawings are not drawn according to actual proportional relationships. The technology, methods and equipment known to those of ordinary skill in the relevant art may not be discussed in detail, but in appropriate cases, the technology, methods and equipment should be considered as part of the specification. In all examples shown and discussed here, any specific value should be interpreted as being merely exemplary, rather than as a limitation. Therefore, other examples of the exemplary embodiments may have different values. It should be noted that similar numbers and letters represent similar items in the following figures, and therefore, once an item is defined in one figure, it does not need to be further discussed in subsequent figures.

[0065] In the description of the present invention, it needs to be understood that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "horizontal, vertical, vertical, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the device or element referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention; the directional words "inside and outside" refer to the inside and outside relative to the outline of each component itself.

[0066] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used herein to describe the spatial positional relationship of a device or feature to other devices or features as shown in the figures. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figures. For example, if the device in the drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" can include both "above" and "below". The device can also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0067] In addition, it should be noted that the use of words such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. Unless otherwise stated, the above words have no special meaning and therefore cannot be understood as limiting the scope of protection of this utility model.

[0068] The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Those skilled in the art will readily appreciate that the present invention is susceptible to various modifications and variations. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A water storage device, characterized in that: The water storage device comprises: A box body (10) has a cavity (11), a water inlet (12) and a water outlet (13), wherein the water outlet (13) is arranged on the inner side wall of the box body (10), the water inlet (12) and the water outlet (13) are both communicated with the cavity (11), and the water inlet (12) is located above the water outlet (13); a drain valve (20) disposed on the outside of the box body (10) and penetrating the side wall where the water outlet (13) is located, the drain valve (20) being in communication with the water outlet (13) to control the on / off of the water outlet (13); A heating groove (30) is provided on the inner side wall of the box body (10), the heating groove (30) is located on the outer periphery of the water outlet (13), and the opening of the heating groove (30) is communicated with the cavity (11).

2. The water storage device according to claim 1, characterized in that The water outlet (13) comprises a connecting section (131) and a drainage section (132); the connecting section (131) is provided on the side wall of the box body (10); the connecting section (131) is communicated with the cavity (11) and the drainage section (132) respectively; a portion of the drainage valve (20) is located in the connecting section (131) to control the connection and disconnection between the connecting section (131) and the drainage section (132); the drainage section (132) is communicated with the outside world; and the connecting section (131) extends obliquely upward from a direction close to the drainage valve (20).

3. The water storage device according to claim 2, characterized in that The projection of the drain valve (20) on the side wall of the box body (10) is at least partially located within the projection range of the heating groove (30) on the side wall of the box body (10), and the projection of the connecting section (131) on the side wall of the box body (10) is at least partially located within the projection range of the heating groove (30) on the side wall of the box body (10).

4. The water storage device according to claim 1, characterized in that An end of the bottom surface (14) of the cavity (11) close to the water outlet (13) is higher than an end of the bottom surface (14) away from the water outlet (13).

5. The water storage device according to claim 4, characterized in that The bottom surface (14) comprises a first flow-guiding surface (141) and a water-collecting surface (142); the first flow-guiding surface (141) is arranged close to the water outlet (13); and the height of the first flow-guiding surface (141) gradually decreases in a direction away from the water outlet (13).

6. The water storage device according to claim 5, characterized in that The bottom surface (14) further comprises a second flow-guiding surface (143), the second flow-guiding surface (143) being located between the first flow-guiding surface (141) and the water-collecting surface (142), the height of the second flow-guiding surface (143) gradually decreasing in a direction away from the water outlet (13), and the inclination angle of the first flow-guiding surface (141) being smaller than the inclination angle of the second flow-guiding surface (143).

7. The water storage device according to claim 4, characterized in that The water storage device further comprises a filter assembly, the filter assembly comprising a mounting frame and a filter screen (41), the filter screen (41) being located within the mounting frame, the mounting frame being arranged on the box body (10) and being located between the water inlet (12) and the bottom surface (14), the filter screen (41) being used for filtering the fluid.

8. The water storage device according to claim 7, characterized in that The mounting frame comprises a support frame (42) and a mounting plate (43); the filter screen (41) is arranged in the support frame (42); a mounting hole (15) is provided on the side wall of the box body (10); the mounting hole (15) is communicated with the cavity (11); the support frame (42) penetrates into the cavity (11) through the mounting hole (15); and the mounting plate (43) is located outside the box body (10) and is fixedly connected to the box body (10).

9. The water storage device according to claim 7, characterized in that: An installation groove (16) is provided on the inner side wall of the box body (10), and the installation groove (16) is annularly arranged on the inner periphery of the box body (10), and the outer edge of the installation frame is located in the installation groove (16).

10. The water storage device according to claim 8, characterized in that The water storage device further comprises a liquid level sensor (50), wherein the liquid level sensor (50) is arranged on the mounting plate (43), and the liquid level sensor (50) is electrically connected to the drain valve (20).

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