Energy-saving and environment-friendly water tank for building construction

Abstract

This invention discloses an energy-saving and environmentally friendly construction water tank, relating to the field of construction technology. It includes a water storage tank with a water storage plate fixed to the top. Symmetrical return channels are formed on the water storage plate, and an inlet channel communicating with the inside of the water storage tank is formed at the bottom of the return channels. A sealing plate is slidably connected inside the inlet channel. A flow guiding mechanism for guiding rainwater is located directly above the water storage plate. A filter screen is fixed inside the water storage tank, and a self-cleaning mechanism is provided on the filter screen. This invention optimizes the rainwater collection structure of existing water tanks. The designed flow guiding mechanism can adjust the tilt angle of the flow guiding plate according to weather conditions, allowing rainwater to contact the flow guiding plate over a larger area, ultimately converging on the water storage plate and entering the water storage tank from the inlet channel for collection. This achieves rainwater collection by increasing the rainwater receiving area, maximizing rainwater collection. Furthermore, the self-cleaning mechanism automatically cleans the filter screen during operation of the flow guiding mechanism to prevent clogging.

Description

Technical Field

[0001] This invention relates to the field of building construction technology, specifically to an energy-saving and environmentally friendly building construction water tank. Background Technology

[0002] In traditional construction processes, water used for construction is used only once, resulting in a huge waste of water resources and running counter to the current advocacy of green and environmentally friendly construction concepts; the inability to recycle and reuse seepage or rainwater also leads to a waste of water resources.

[0003] For example, CN219825554U discloses an energy-saving and environmentally friendly construction water tank, including a base. A fixed frame is fixedly connected to the top of the base, and the top of the fixed frame is open. A water tank is inserted into the top of the fixed frame. Two water inlets are fixedly installed on the top of the water tank, symmetrically distributed left and right. A filter screen is threaded into the inside of each water inlet. This invention collects rainwater through the top water inlets, and simultaneously filters the rainwater through the filter screen. The filtered rainwater enters the water tank, achieving an energy-saving and environmentally friendly effect. However, this water tank only collects rainwater through two water inlets, and rainwater falls from all directions. The relatively small opening of the water inlets results in a small receiving area for rainwater, making it impossible to fill the water tank quickly. Furthermore, the filter screen filters out small particles of sediment, which accumulates on the screen, making it difficult for water to penetrate, leading to blockage and requiring frequent cleaning. Therefore, we propose an energy-saving and environmentally friendly construction water tank. Summary of the Invention

[0004] The purpose of this invention is to provide an energy-saving and environmentally friendly building construction water tank that can improve rainwater collection efficiency, so as to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: an energy-saving and environmentally friendly building construction water tank, comprising a water storage tank, a water storage plate fixed to the top of the water storage tank, symmetrically arranged return channels on the water storage plate, a water inlet channel communicating with the interior of the water storage tank at the bottom of the return channels, a sealing plate slidably connected inside the water inlet channel, a flow guiding mechanism for guiding rainwater provided directly above the water storage plate, a filter screen fixed inside the water storage tank, and a self-cleaning mechanism provided on the filter screen; the flow guiding mechanism includes a connecting plate, with flow guiding plates rotatably connected to both sides of the connecting plate, angle adjustment components provided on both sides of the flow guiding plates, a lifting component installed on the water storage plate, the output end of the lifting component fixed to the bottom center of the connecting plate, connecting frames fixed to both sides of the bottom of the connecting plate, and the bottom of the connecting frames fixedly connected to two sealing plates respectively.

[0006] Preferably, the lifting component includes a first stud, the top end of which is fixed to the bottom end of the connecting plate. The first stud passes through the water storage plate and its bottom end extends into the interior of the water storage tank. A threaded tube is rotatably connected to the middle of the water storage plate via a bearing. The first stud is threadedly connected inside the threaded tube. A driving component is fixedly installed at the bottom of the water storage plate. The lifting component facilitates the lifting and lowering of the connecting plate, thereby driving the two guide plates to move in tandem.

[0007] Preferably, the driving component includes a driving motor, which is fixed to the bottom of the water storage plate. A driving gear is fixed to the output end of the driving motor. A transmission gear is meshed with one side of the driving gear. The transmission gear is fixedly sleeved on the outside of the threaded tube. A linkage component that is transmitted and connected to the self-cleaning mechanism is also installed on the outside of the threaded tube. The driving component facilitates the provision of power for the rotation of the threaded tube.

[0008] Preferably, the angle adjusting component includes a T-shaped plate, which is fixed to the outside of the water storage plate. A through groove is provided on the T-shaped plate, and a limiting block is slidably connected in the through groove. A limiting shaft is rotatably connected in the limiting block, and one end of the limiting shaft is fixedly connected to the outside of the guide plate. The angle adjusting component facilitates stable adjustment of the rotation angle of the two guide plates.

[0009] Preferably, the self-cleaning mechanism includes a cleaning brush, with connecting rods fixed to both sides of the top of the cleaning brush. The bottom of the cleaning brush contacts the top of the filter screen. A movable block is fixed to the end of the connecting rod away from the cleaning brush. A threaded cylinder and a sliding cylinder are respectively fixed inside the two movable blocks. A second stud is threadedly connected inside the threaded cylinder. A first connecting seat is rotatably connected to both ends of the second stud. One end of the first connecting seat is fixed to the bottom of the water storage plate. A guide post is slidably sleeved inside the sliding cylinder. A fixing plate is fixed to both ends of the guide post. One end of the fixing plate is fixed to the bottom of the water storage plate. The output end of the linkage is drivenly connected to the second stud. The self-cleaning mechanism facilitates active cleaning of the filter screen when the connecting plate is raised or lowered.

[0010] Preferably, the linkage includes a driving pulley, a driven pulley, a driving bevel gear, and a driven bevel gear. The driving pulley is fixedly sleeved on the outside of the threaded tube. A belt drives between the driven pulley and the driving pulley. A drive shaft is fixedly sleeved between the driving bevel gear and the driven pulley. A second connecting seat is rotatably connected to the middle of the drive shaft. An L-shaped plate is fixed to one end of the second connecting seat. One end of the L-shaped plate is fixed to the bottom of the water storage plate. The driving bevel gear meshes with the driven bevel gear. The driven bevel gear is fixedly sleeved on the outside of the second stud. The linkage between the driving component and the second stud is realized through the linkage.

[0011] Preferably, the connecting plate is provided with arc-shaped guide grooves on both sides, which allow rainwater falling on the connecting plate to flow along both sides of the connecting plate, thereby further realizing the function of guiding rainwater.

[0012] Preferably, the top of the connecting plate is provided with a groove, and multiple humidity sensors are installed in the groove. When it rains, rainwater will fall into the groove. When the humidity sensor detects the rainwater, the drive unit will automatically start and drive the connecting plate to rise, thereby realizing the automatic switching between the arched state and the flat state of the two guide plates.

[0013] Preferably, an overflow pipe is fixedly connected to the outside of the water storage tank and communicates with its interior. The overflow pipe is located below the filter screen, and the distance between the center of the overflow pipe and the bottom of the filter screen is 10 centimeters. When the water volume in the water storage tank reaches a certain level, the rainwater that enters later will automatically flow out through the overflow pipe.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] This invention optimizes the existing rainwater collection structure of water tanks. Through a designed flow guiding mechanism, the tilt angle of the flow guiding plate can be adjusted according to weather conditions, allowing rainwater to contact the flow guiding plate over a larger area. Finally, the rainwater flows onto the water storage plate and enters the water storage tank from the inlet trough for collection. This achieves rainwater collection by increasing the rainwater receiving area, maximizing rainwater collection. In addition, a self-cleaning mechanism is used to automatically clean the filter screen during the operation of the flow guiding mechanism to prevent the filter screen from becoming clogged. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0017] Figure 2 This is a partial structural diagram of the present invention;

[0018] Figure 3 This is a schematic diagram of the flow guiding mechanism of the present invention;

[0019] Figure 4 This is a schematic diagram of the angle adjustment component of the present invention;

[0020] Figure 5 This is a schematic diagram of the self-cleaning mechanism of the present invention;

[0021] Figure 6 This is a schematic diagram of the connecting plate structure of the present invention.

[0022] In the diagram: 1-Water storage tank; 2-Water storage plate; 3-Return trough; 4-Water inlet trough; 5-Sealing plate; 6-Flow guiding mechanism; 7-Filter screen; 8-Self-cleaning mechanism; 9-Connecting plate; 10-Flow guiding plate; 11-Angle adjustment component; 12-Lifting component; 13-Connecting frame; 14-First stud; 15-Threaded pipe; 16-Drive component; 17-Drive motor; 18-Drive gear; 19-Transmission gear; 20-Linkage component; 21-T-shaped plate; 22-Through groove; 23-Limiting block; 24 - Limiting shaft; 25 - Cleaning brush; 26 - Connecting rod; 27 - Moving block; 28 - Threaded cylinder; 29 - Slide cylinder; 30 - Second stud; 31 - First connecting seat; 32 - Guide column; 33 - Fixing plate; 34 - Driving pulley; 35 - Driven pulley; 36 - Driving bevel gear; 37 - Driven bevel gear; 38 - Belt; 39 - Drive shaft; 40 - Second connecting seat; 41 - L-shaped plate; 42 - Arc-shaped guide groove; 43 - Groove; 44 - Humidity sensor; 45 - Overflow pipe. Detailed Implementation

[0023] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0024] Example 1

[0025] like Figures 1-3As shown in the diagram, an energy-saving and environmentally friendly construction water tank includes a water storage tank 1. A water storage plate 2 is fixed to the top of the water storage tank 1. A return channel 3 is symmetrically arranged on the water storage plate 2. An inlet channel 4, connected to the interior of the water storage tank 1, is located at the bottom of the return channel 3. During rainwater collection, rainwater flows onto the water storage plate 2 and enters the water storage tank 1 through the inlet channel 4 for collection. A sealing plate 5 is slidably connected inside the inlet channel 4. The sealing plate 5 automatically opens when rainwater collection is needed and automatically closes the inlet channel 4 after rainwater collection stops. A flow guiding mechanism 6 is located directly above the water storage plate 2 to guide the rainwater. A filter screen 7 is fixed inside the water storage tank 1 to filter impurities in the rainwater flowing into the tank. The filter screen 7 is equipped with a self-cleaning mechanism 8, which automatically cleans the silt and sand clogging the filter screen 7. The flow guiding mechanism 6 includes a connecting plate 9, with flow guiding plates 10 rotatably connected to both sides of the connecting plate 9. Angle adjusting components 11 are provided on both sides of the flow guiding plates 10. A lifting component 12 is installed on the water storage plate 2. The output end of the lifting component 12 is fixed to the bottom center of the connecting plate 9. A connecting frame 13 is fixed on both sides of the bottom of the connecting plate 9. The bottom of the connecting frame 13 is fixedly connected to two sealing plates 5 respectively. The lifting component 12 drives the connecting plate 9 to rise. The connecting plate 9 drives the two flow guiding plates 10 from a horizontal state to an inclined state through the angle adjusting components 11. The rainwater falling on the flow guiding plates 10 will have a certain flow effect. Small raindrops gradually gather to form large raindrops, increasing the rainwater collection effect. Finally, the raindrops fall into the water storage plate 2 by gravity, thereby collecting rainwater by increasing the rainwater receiving area and maximizing the collection of rainwater.

[0026] Among them, such as Figure 3 As shown, in order to facilitate the lifting and lowering of the connecting plate 9, the lifting component 12 includes a first stud 14. The top end of the first stud 14 is fixed to the bottom end of the connecting plate 9. The first stud 14 passes through the water storage plate 2 and its bottom end extends into the interior of the water storage tank 1. The middle part of the water storage plate 2 is rotatably connected to a threaded tube 15 through a bearing. The first stud 14 is threadedly connected inside the threaded tube 15. A driving component 16 is fixedly installed at the bottom of the water storage plate 2. The driving action of the driving component 16 drives the threaded tube 15 to rotate. The threaded tube 15 drives the first stud 14 to move in the vertical direction. The first stud 14 drives the connecting plate 9 to move, so that the connecting plate 9 pulls the two guide plates 10 to rotate and adjusts the rainwater diversion angle of the guide plates 10. At the same time, the first stud 14 will also drive the sealing plate 5 to move through the connecting frame 13, automatically opening the water inlet trough 4.

[0027] At the same time, such as Figure 5As shown, in order to facilitate the rotation of the threaded tube 15, the drive component 16 includes a drive motor 17, which is fixed to the bottom of the water storage plate 2. The output end of the drive motor 17 is fixed with a drive gear 18, and a transmission gear 19 is meshed with one side of the drive gear 18. The transmission gear 19 is fixedly sleeved on the outside of the threaded tube 15. A linkage component 20 that is transmitted and connected to the self-cleaning mechanism 8 is also installed on the outside of the threaded tube 15. The drive motor 17 drives the drive gear 18 to rotate, the drive gear 18 drives the transmission gear 19 to rotate, the transmission gear 19 drives the threaded tube 15 to rotate, and the threaded tube 15 drives the first stud 14 to move, thereby driving the connecting plate 9 to move.

[0028] In addition, such as Figure 4 As shown, in order to facilitate stable adjustment of the rotation angle of the two guide plates 10, the angle adjustment component 11 includes a T-shaped plate 21. The T-shaped plate 21 is fixed to the outside of the water storage plate 2. A through groove 22 is provided on the T-shaped plate 21. A limiting block 23 is slidably connected in the through groove 22. A limiting shaft 24 is rotatably connected in the limiting block 23. One end of the limiting shaft 24 is fixedly connected to the outside of the guide plate 10. When the connecting plate 9 pulls the guide plate 10 to move, one end of the guide plate 10 will rotate, and the limiting shaft 24 at the other end will also rotate in the limiting block 23. At the same time, the limiting block 23 slides in the through groove 22 to adjust the relative distance between the guide plate 10 and the middle of the water storage plate 2, so that the angle adjustment of the guide plate 10 is more reasonable. The adjusted angle makes the bottom of the guide plate 10 face the return groove 3, which is conducive to the rapid return of rainwater.

[0029] At the same time, such as Figure 6 As shown, in order to further realize the function of guiding rainwater, arc-shaped guide grooves 42 are provided on both sides of the connecting plate 9. Rainwater falls on the arc-shaped guide grooves 42 for diversion, so that the rainwater falling on the connecting plate 9 can flow along both sides of the connecting plate 9, and can also be introduced into the guide plate 10.

[0030] In addition, such as Figure 6 As shown, in order to achieve intelligent opening, a groove 43 is provided on the top of the connecting plate 9, and multiple humidity sensors 44 are installed in the groove 43.

[0031] When it rains, rainwater will fall into the groove 43. When the humidity sensor 44 detects the rainwater, the drive unit 16 will start automatically, driving the connecting plate 9 to rise, thereby realizing the automatic switching between the arched state and the flat state of the two guide plates.

[0032] Example 2

[0033] like Figure 5As shown, this embodiment further illustrates Example 1. The self-cleaning mechanism 8 in the figure includes a cleaning brush 25. Connecting rods 26 are fixed to both sides of the top of the cleaning brush 25. The bottom of the cleaning brush 25 contacts the top of the filter screen 7. A moving block 27 is fixed to the end of the connecting rod 26 away from the cleaning brush 25. A threaded cylinder 28 and a sliding cylinder 29 are respectively fixed inside the two moving blocks 27. A second stud 30 is threadedly connected inside the threaded cylinder 28. Both ends of the second stud 30 are rotatably connected to a first connecting seat 31. One end of the first connecting seat 31 is connected to... The bottom of the water storage plate 2 is fixed, and the guide post 32 is slidably sleeved inside the slide cylinder 29. Both ends of the guide post 32 are fixed with fixing plates 33. One end of the fixing plate 33 is fixed to the bottom of the water storage plate 2. The output end of the linkage 20 is connected to the second stud 30 for transmission. When the threaded tube 15 rotates, it will drive the second stud 30 to rotate through the linkage 20. The second stud 30 drives the moving block 27 to move. The moving block 27 drives the cleaning brush 25 to move on the filter screen 7, automatically cleaning the mud and sand on the filter screen 7, so that the filter screen 7 can be actively cleaned when the connecting plate 9 is raised and lowered.

[0034] Among them, such as Figure 5 As shown, to achieve linkage between the driving component 16 and the second stud 30, the linkage component 20 includes a driving pulley 34, a driven pulley 35, a driving bevel gear 36, and a driven bevel gear 37. The driving pulley 34 is fixedly sleeved on the outside of the threaded tube 15. A belt 38 is drivingly connected between the driven pulley 35 and the driving pulley 34. A drive shaft 39 is fixedly sleeved between the driving bevel gear 36 and the driven pulley 35. A second connecting seat 40 is rotatably connected to the middle of the drive shaft 39. An L-shaped plate 41 is fixed to one end of the second connecting seat 40. One end of the L-shaped plate 41 is fixed to the bottom of the water storage plate 2. The driving bevel gear 36 and the driven bevel gear 37... The driven bevel gear 37 is fixedly sleeved on the outside of the second stud 30. The drive motor 17 drives the drive gear 18 to rotate, the drive gear 18 drives the transmission gear 19 to rotate, the transmission gear 19 drives the threaded tube 15 to rotate, the threaded tube 15 drives the drive pulley 34 to rotate, the drive pulley 34 drives the driven pulley 35 to rotate via the belt 38, the driven pulley 35 drives the drive bevel gear 36 to rotate, the drive bevel gear 36 drives the driven bevel gear 37 to rotate, the driven bevel gear 37 drives the second stud 30 to rotate, the second stud 30 drives the threaded cylinder 28 to move, thereby driving the movable block 27 fixed to the threaded cylinder 28 to move.

[0035] Example 3

[0036] like Figure 1 and Figure 2As shown in the figure, this embodiment further explains Example 1. The top of the water storage tank 1 is fixed with a water storage plate 2. The water storage plate 2 is symmetrically provided with a return channel 3. The bottom of the return channel 3 is provided with a water inlet channel 4 that communicates with the inside of the water storage tank 1. A sealing plate 5 is slidably connected inside the water inlet channel 4. A guide mechanism 6 for guiding rainwater is provided directly above the water storage plate 2. A filter screen 7 is fixed inside the water storage tank 1. A self-cleaning mechanism 8 is provided on the filter screen 7. An overflow pipe 45 that communicates with the inside of the water storage tank 1 is fixedly connected to the outside of the water storage tank 1. The overflow pipe 45 is located below the filter screen 7, and the distance between the center of the overflow pipe 45 and the bottom of the filter screen 7 is 10 centimeters. When the water level in the water storage tank 1 exceeds the overflow pipe 45, the water that enters the water tank later will automatically flow out from the overflow pipe 45, so that the water storage tank 1 is automatically in a rainwater intake and discharge balance state.

[0037] In this solution, the drive motor 17 is preferably model Y80M1-2. The power supply interface of the motor is connected to the power supply system through a switch. The motor operation circuit is a conventional motor forward and reverse rotation control program. The circuit operation is an existing conventional circuit. The circuits and controls involved in this solution are all existing technologies, and will not be described in detail here.

[0038] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0039] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. An energy-saving and environmentally friendly construction water tank, comprising a water storage tank (1), characterized in that: The top of the water storage tank (1) is fixed with a water storage plate (2), and the water storage plate (2) is symmetrically provided with a return channel (3). The bottom of the return channel (3) is provided with a water inlet channel (4) that communicates with the inside of the water storage tank (1). A sealing plate (5) is slidably connected inside the water inlet channel (4). A flow guiding mechanism (6) for guiding rainwater is provided directly above the water storage plate (2). A filter screen (7) is fixed inside the water storage tank (1). A self-cleaning mechanism (8) is provided on the filter screen (7). The flow guiding mechanism (6) includes a connecting plate (9). Both sides of the connecting plate (9) are rotatably connected with flow guiding plates (10). Both sides of the flow guiding plates (10) are provided with angle adjustment parts (11). A lifting part is installed on the water storage plate (2). 12), the output end of the lifting component (12) is fixed to the bottom center of the connecting plate (9), and the bottom sides of the connecting plate (9) are fixed with connecting frames (13), and the bottom of the connecting frames (13) is fixedly connected to the two sealing plates (5) respectively; the angle adjusting component (11) includes a T-shaped plate (21), the T-shaped plate (21) is fixed to the outside of the water storage plate (2), the T-shaped plate (21) is provided with a through groove (22), the through groove (22) is slidably connected with a limit block (23), the limit block (23) is rotatably connected with a limit shaft (24), one end of the limit shaft (24) is fixedly connected to the outside of the guide plate (10); the connecting plate (9) is provided with arc-shaped guide grooves (42) on both sides.

2. The energy-saving and environmentally friendly building construction water tank according to claim 1, characterized in that: The lifting component (12) includes a first stud (14), the top end of which is fixed to the bottom end of the connecting plate (9). The first stud (14) passes through the water storage plate (2) and its bottom end extends into the interior of the water storage tank (1). The middle part of the water storage plate (2) is rotatably connected to a threaded tube (15) via a bearing. The first stud (14) is threadedly connected to the threaded tube (15). A driving component (16) is fixedly installed at the bottom of the water storage plate (2).

3. The energy-saving and environmentally friendly building construction water tank according to claim 2, characterized in that: The driving component (16) includes a driving motor (17), which is fixed to the bottom of the water storage plate (2). A driving gear (18) is fixed to the output end of the driving motor (17). A transmission gear (19) is meshed with one side of the driving gear (18). The transmission gear (19) is fixedly sleeved on the outside of the threaded tube (15). A linkage component (20) that is connected to the self-cleaning mechanism (8) is also installed on the outside of the threaded tube (15).

4. The energy-saving and environmentally friendly building construction water tank according to claim 3, characterized in that: The self-cleaning mechanism (8) includes a cleaning brush (25). Connecting rods (26) are fixed on both sides of the top of the cleaning brush (25). The bottom of the cleaning brush (25) is in contact with the top of the filter screen (7). A moving block (27) is fixed at one end of the connecting rod (26) away from the cleaning brush (25). A threaded cylinder (28) and a sliding cylinder (29) are respectively fixed inside the two moving blocks (27). A second stud is threaded inside the threaded cylinder (28). (30), both ends of the second stud (30) are rotatably connected to the first connecting seat (31), one end of the first connecting seat (31) is fixed to the bottom of the water storage plate (2), the inside of the slide cylinder (29) is slidably sleeved with the guide post (32), both ends of the guide post (32) are fixed with the fixing plate (33), one end of the fixing plate (33) is fixed to the bottom of the water storage plate (2), and the output end of the linkage (20) is connected to the second stud (30) in a transmission connection.

5. The energy-saving and environmentally friendly building construction water tank according to claim 4, characterized in that: The linkage (20) includes a driving pulley (34), a driven pulley (35), a driving bevel gear (36), and a driven bevel gear (37). The driving pulley (34) is fixedly sleeved on the outside of the threaded tube (15). A belt (38) is connected between the driven pulley (35) and the driving pulley (34). A drive shaft (39) is fixedly sleeved between the driving bevel gear (36) and the driven pulley (35). A second connecting seat (40) is rotatably connected to the middle of the drive shaft (39). An L-shaped plate (41) is fixed at one end of the second connecting seat (40). One end of the L-shaped plate (41) is fixed to the bottom of the water storage plate (2). The driving bevel gear (36) meshes with the driven bevel gear (37). The driven bevel gear (37) is fixedly sleeved on the outside of the second stud (30).

6. The energy-saving and environmentally friendly building construction water tank according to claim 1, characterized in that: The top of the connecting plate (9) is provided with a groove (43), and multiple humidity sensors (44) are provided in the groove (43).

7. The energy-saving and environmentally friendly construction water tank according to claim 1, characterized in that: An overflow pipe (45) is fixedly connected to the outside of the water storage tank (1) and communicates with its interior. The overflow pipe (45) is located below the filter screen (7), and the distance between the center of the overflow pipe (45) and the bottom of the filter screen (7) is ten centimeters.

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