Three-mode adjustable heat pump device

Abstract

The invention provides a three-mode adjustable heat pump device, and relates to the technical field of heat pump devices, the three-mode adjustable heat pump device comprises a water tank and a condenser case, the water tank is internally provided with a high-pressure air pipe assembly, and the upper end and the lower end of the high-pressure air pipe assembly are fixedly provided with a first air inlet pipe and a high-pressure air outlet pipe respectively; a compressor body and an expansion valve body are installed in the condenser case, the expansion valve body is located below the compressor body, the first air inlet pipe is fixedly connected with the compressor body, the high-pressure air outlet pipe is fixedly connected with the expansion valve body, and an evaporator body is fixedly installed in the condenser case. A refrigerant enters the evaporator body through the expansion valve body, at the moment, the pressure is instantly reduced, the refrigerant becomes low-temperature and low-pressure air again, finally cold air is absorbed by the compressor body to form circulation, three-mode switching can be conducted according to the use requirement, water in the water tank is heated or cooled or the normal temperature is achieved, and the use functionality is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of heat pump devices, and more specifically, particularly relates to a three-mode adjustable heat pump device. Background Art

[0002] Traditional heat exchange systems have relatively simple functions and can often only achieve a single heating or cooling mode for the water in the water tank. They cannot flexibly switch between multiple modes according to actual usage needs, which limits their application scenarios and functionality.

[0003] There is a lack of effective cleaning mechanisms for key components in heat exchange systems, such as high-pressure gas pipe assemblies. Usually, the relevant components need to be disassembled for cleaning, which is cumbersome and increases maintenance costs, while also affecting the normal operation and performance of the system.

[0004] Moreover, when cleaning the high-pressure air pipe components, the existing cleaning methods are not convenient and efficient enough, and cannot achieve comprehensive and in-depth cleaning of their surfaces, which easily leads to dirt accumulation and affects the heat exchange efficiency and system stability.

[0005] In addition, during the operation of the evaporator body, dust and other impurities are easily accumulated on the surface, affecting its performance and normal operation. However, the existing cleaning methods are not effective and cannot effectively remove dust, especially when frosting in winter. There is a lack of effective countermeasures, which leads to the decline of the performance of the evaporator body and affects the working efficiency and stability of the entire system.

[0006] In summary, in order to improve the functionality, cleaning convenience and performance maintenance of each component of the heat exchange system, the present invention proposes an innovative heat exchange system and a corresponding design scheme. Summary of the invention

[0007] In order to solve the above technical problems, the present invention provides a three-mode adjustable heat pump device to solve the above problems.

[0008] A three-mode adjustable heat pump device comprises a water tank and a condenser chassis, wherein a high-pressure air pipe assembly is arranged inside the water tank, and a first air inlet pipe and a high-pressure air outlet pipe are fixedly installed at the upper and lower ends of the high-pressure air pipe assembly respectively, a compressor body and an expansion valve body are installed inside the condenser chassis, and the expansion valve body is located below the compressor body, the first air inlet pipe is fixedly connected to the compressor body, the high-pressure air outlet pipe is fixedly connected to the expansion valve body, an evaporator body is fixedly installed inside the condenser chassis, and the compressor body and the expansion valve body are connected to the evaporator body through pipes The high-pressure air pipe assembly is connected with the first air inlet pipe and the high-pressure air outlet pipe, and a connecting pipe sleeve is fixedly installed at the connection between the high-pressure air pipe assembly and the first air inlet pipe and the high-pressure air outlet pipe. A cleaning frame is provided on the surface of the high-pressure air pipe assembly, and fixed frames are provided on the front and rear sides of the cleaning frame. A wheel frame assembly is provided on the side of each of the fixed frames, and a pulley is provided at the end of each of the wheel frame assembly, and each of the pulleys is in contact with the surface of the high-pressure air pipe assembly. Two sets of lifting assemblies are fixedly installed on the inner wall of the condenser chassis, an upper fixed connecting frame is installed between the threaded rods of the two sets of lifting assemblies, and a cleaning frame assembly is fixedly installed below the upper fixed connecting frame.

[0009] Preferably, at least two first scraping knife dies are fixedly installed at equal intervals on the inner wall of the cleaning frame, and at least two brush heads are fixedly installed at equal intervals on the inner wall of the cleaning frame between each two first scraping knife dies, a groove is opened on the side end of each fixed frame, the side end of each wheel frame assembly is located in the groove, and a rotating shaft is rotatably installed between the side end of the wheel frame assembly and the inner wall of the groove, a spring is fixedly installed between the side end of each wheel frame assembly and the inner wall of the groove, a driving assembly is fixedly installed between each pulley and the wheel frame assembly, and the driving assembly is used to drive the pulley.

[0010] Preferably, two limit bars are fixedly installed on the side end of each of the fixed frames, and the limit bars are used to limit the rotation angle of the wheel frame assembly, the side wall of the upper fixed connecting frame is fixedly installed with a nozzle connecting frame, and the side wall of the nozzle connecting frame is fixedly installed with at least two high-pressure nozzles, and the side wall of the cleaning frame assembly is fixedly installed with a sponge cleaning bar, and the sponge cleaning bar is in an inclined state with respect to the cleaning frame assembly.

[0011] Preferably, a high-pressure ventilation valve is fixedly installed on the top of the condenser chassis, a second air inlet pipe is fixedly installed on the side wall of the high-pressure ventilation valve, and the second air inlet pipe is connected to the compressor body, a third air inlet pipe is fixedly installed below the high-pressure ventilation valve, and the third air inlet pipe is connected to the upper fixed connecting frame, a water inlet pipe and a water outlet pipe are fixedly installed through the side wall of the water tank, and the water outlet pipe is located at the upper end of the water tank, and the water inlet pipe is located at the lower end of the water tank.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] In the present invention, the air is compressed and heated by the compressor body. After the air is heated, it enters the high-pressure steam pipe assembly through the first air inlet pipe. During this period, the cold water inside the water tank will be heated, and the hot air will become refrigerant after releasing heat. The refrigerant enters the expansion valve body through the high-pressure air outlet pipe, and the refrigerant enters the evaporator body through the expansion valve body. At this time, the pressure drops instantly and becomes low-temperature and low-pressure air again. Finally, the cold air is absorbed by the compressor body to form a cycle. According to usage requirements, three-mode switching can be performed to heat, cool or keep the water inside the water tank at room temperature, which greatly improves the functionality of use.

[0014] In the present invention, multiple driving components on both sides of the cleaning frame are started, and the driving components are started to drive the pulley to rotate. The pulley rotates on the surface of the high-pressure air pipe assembly and drives the cleaning frame to move forward. The cleaning frame moves around the high-pressure air pipe assembly. When the cleaning frame moves, it drives multiple first scraping knife dies and brush heads on the inner wall to move. The movement of the first scraping knife dies and brush heads cleans the surface of the high-pressure air pipe assembly. By using the cleaning frame to clean the surface of the high-pressure air pipe assembly, there is no need to disassemble the water tank, which greatly improves the convenience of cleaning and can maintain the performance of the high-pressure air pipe assembly.

[0015] In the present invention, the movement of the cleaning frame will drive multiple wheel frame assemblies to rotate, and the multiple wheel frame assemblies rotate through the rotating shaft. The rotation of the wheel frame assemblies drives the spring to compress and deform. The wheel frame assemblies are designed to be steerable, which can improve the mobility of the cleaning frame and improve the smoothness of the movement of the cleaning frame in the high-pressure air pipe assembly. At the same time, two cleaning mechanisms, a first scraping knife die and a brush head, are adopted, thereby improving the cleaning ability of the high-pressure gas tank assembly.

[0016] In the present invention, two sets of lifting components are composed of a motor and a threaded rod. The lifting components drive the upper fixed connecting frame to move downward through the threaded rod. The downward movement of the upper fixed connecting frame drives the cleaning frame assembly and the sponge cleaning bar to move downward. The sponge cleaning bar moves downward to scrape and clean the surface of the evaporator body, clean the dust on the surface of the evaporator body, thereby improving the performance of the evaporator body and preventing the evaporator body from failing to operate normally due to dust clogging.

[0017] In the present invention, the high-pressure ventilation valve connects the second air intake pipe with the compressor body. At this time, the compressor body transports high-pressure air to the high-pressure ventilation valve, and then transports it into the upper fixed connecting frame through the third air intake pipe. The upper fixed connecting frame discharges the air through a plurality of high-pressure nozzles. The high-pressure nozzles impact the high-pressure gas onto the surface of the evaporator body. At this time, the dust on the surface of the evaporator body will fall off quickly after being stressed. In addition, when frosting in winter, the high-pressure gas sprayed by the high-pressure nozzles can accelerate the melting of the frost and maintain the operating performance of the evaporator body in winter. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the water tank structure of the present invention;

[0019] Figure 2 It is a schematic diagram of the condenser chassis structure of the present invention;

[0020] Figure 3 is a schematic diagram of the structure of the first air intake pipe of the present invention;

[0021] Figure 4 It is a schematic diagram of the structure of the cleaning rack of the present invention;

[0022] Figure 5 It is a schematic diagram of the structure of the wheel carrier assembly of the present invention;

[0023] Figure 6 It is a schematic diagram of the structure of the high-pressure ventilation valve of the present invention;

[0024] Figure 7 It is a schematic diagram of the structure of the evaporator body of the present invention;

[0025] Figure 8 It is a schematic structural diagram of the sponge cleaning bar of the present invention.

[0026] In the figure, the corresponding relationship between the component names and the figure numbers is: 1. Water tank; 11. Water inlet pipe; 12. Water outlet pipe; 13. First air inlet pipe; 14. High-pressure air outlet pipe; 15. High-pressure air pipe assembly; 16. Connecting pipe sleeve; 17. Cleaning frame; 18. First scraping knife die; 19. Brush head; 2. Fixed frame; 21. Groove; 22. Limiting strip; 23. Wheel frame assembly; 24. Spring; 25. Rotating shaft; 26. Driving assembly; 27. Pulley; 28. Compressor body; 29. ​​Expansion valve body; 3. Evaporator body; 31. Lifting assembly; 32. Upper fixed connecting frame; 33. Nozzle connecting frame; 34. High-pressure nozzle; 35. Cleaning frame assembly; 36. Sponge cleaning strip; 37. High-pressure ventilation valve; 38. Second air inlet pipe; 39. Third air inlet pipe; 4. Condenser chassis; 41. Heat dissipation assembly. DETAILED DESCRIPTION

[0027] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0028] See also Figure 1-Figure 8The present invention provides a three-mode adjustable heat pump device, including a water tank 1 and a condenser chassis 4, a heat dissipation component 41 is arranged inside the condenser chassis 4, a high-pressure air pipe component 15 is arranged inside the water tank 1, a first air inlet pipe 13 and a high-pressure air outlet pipe 14 are fixedly installed at the upper and lower ends of the high-pressure air pipe component 15, a compressor body 28 and an expansion valve body 29 are installed inside the condenser chassis 4, and the expansion valve body 29 is located below the compressor body 28, the first air inlet pipe 13 is fixedly connected to the compressor body 28, the high-pressure air outlet pipe 14 is fixedly connected to the expansion valve body 29, an evaporator body 3 is fixedly installed inside the condenser chassis 4, the compressor body 28 compresses and heats the air, and the heated air enters the high-pressure air pipe component 15 through the first air inlet pipe 13, during which the cold water inside the water tank 1 will be heated, and the hot air will become a refrigerant after releasing heat, and the refrigerant The refrigerant enters the expansion valve body 29 through the high-pressure air outlet pipe 14, and the refrigerant enters the evaporator body 3 through the expansion valve body 29. The compressor body 28 and the expansion valve body 29 are connected to the evaporator body 3 through pipelines. The connection between the high-pressure air pipe assembly 15 and the first air inlet pipe 13 and the high-pressure air outlet pipe 14 is fixedly installed with a connecting pipe sleeve 16. The surface of the high-pressure air pipe assembly 15 is sleeved with a cleaning frame 17. The front and rear sides of the cleaning frame 17 are provided with a fixing frame 2. The side of each fixing frame 2 is provided with a wheel frame assembly 23. The end of each wheel frame assembly 23 is provided with a pulley 27, and each pulley 27 is fitted with the surface of the high-pressure air pipe assembly 15. Two sets of lifting assemblies 31 are fixedly installed on the inner wall of the condenser chassis 4. An upper fixed connecting frame 32 is installed between the threaded rods of the two sets of lifting assemblies 31, and a cleaning frame assembly 35 is fixedly installed below the upper fixed connecting frame 32.

[0029] At least two first scraping dies 18 are fixedly installed on the inner wall of the cleaning frame 17 at equal intervals, and at least two brush heads 19 are fixedly installed on the inner wall of the cleaning frame 17 between each two first scraping dies 18 at equal intervals. A groove 21 is provided at the side end of each fixed frame 2, and the side end of each wheel frame assembly 23 is located in the groove 21. The driving assembly 26 is started to drive the pulley 27 to rotate, and the pulley 27 rotates on the surface of the high-pressure air pipe assembly 15 and drives the cleaning frame 17 to move forward. The cleaning frame 17 moves around the high-pressure air pipe assembly 15, and the cleaning frame 17 drives the cleaning frame 17 to move when moving. The multiple first scraping dies 18 and the brush heads 19 on the inner wall move, and the first scraping dies 18 and the brush heads 19 move to clean the surface of the high-pressure air pipe assembly 15. The surface of the high-pressure gas tank assembly 15 is cleaned by using the cleaning frame 17, and a rotating shaft 25 is rotatably installed between the side end of the wheel frame assembly 23 and the inner wall of the groove 21, a spring 24 is fixedly installed between the side end of each wheel frame assembly 23 and the inner wall of the groove 21, and a driving assembly 26 is fixedly installed between each pulley 27 and the wheel frame assembly 23, and the driving assembly 26 is used to drive the pulley 27.

[0030] Two limiting strips 22 are fixedly installed on the side end of each fixed frame 2, and the limiting strips 22 are used to limit the rotation angle of the wheel frame assembly 23. The side wall of the upper fixed connecting frame 32 is fixedly installed with a nozzle connecting frame 33. The movement of the cleaning frame 17 will drive the multiple wheel frame assemblies 23 to rotate. The multiple wheel frame assemblies 23 rotate through the rotating shaft 25, and the rotation of the wheel frame assembly 23 drives the spring 24 to compress and deform. The wheel frame assembly 23 is designed to be steerable, which can improve the mobility of the cleaning frame 17 and improve the smoothness of the movement of the cleaning frame 17 in the high-pressure gas tank assembly 15. At the same time, two cleaning mechanisms, a first scraping die 18 and a brush head 19, are adopted. At least two high-pressure nozzles 34 are fixedly installed on the side wall of the nozzle connecting frame 33, and a sponge cleaning strip 36 is fixedly installed on the side wall of the cleaning frame assembly 35, and the sponge cleaning strip 36 is inclined to the cleaning frame assembly 35.

[0031] A high-pressure ventilation valve 37 is fixedly installed on the top of the condenser chassis 4, and a second air inlet pipe 38 is fixedly installed on the side wall of the high-pressure ventilation valve 37. When the high-pressure ventilation valve 37 is started, the high-pressure ventilation valve 37 connects the second air inlet pipe 38 with the compressor body 28. At this time, the compressor body 28 delivers high-pressure air to the high-pressure ventilation valve 37, and then delivers it to the upper fixed connecting frame 32 through the third air inlet pipe 39. The upper fixed connecting frame 32 is discharged through a plurality of high-pressure nozzles 34. The high-pressure nozzles 34 impacts the high-pressure gas onto the surface of the evaporator body 3. At this time, the dust on the surface of the evaporator body 3 will fall off quickly after the force is applied, and the second air inlet pipe 38 is connected with the compressor body 28. A third air inlet pipe 39 is fixedly installed below the high-pressure ventilation valve 37. The third air inlet pipe 39 is connected with the upper fixed connecting frame 32. A water inlet pipe 11 and a water outlet pipe 12 are fixedly installed through the side wall of the water tank 1, and the water outlet pipe 12 is located at the upper end of the water tank 1, and the water inlet pipe 11 is located at the lower end of the water tank 1.

[0032] Working principle:

[0033] In the first step, the water inlet pipe 11 is connected to the cold water inlet end, and the cold water enters the water tank 1 through the water inlet pipe 11. The compressor body 28 inside the condenser chassis 4 operates, and the cold air enters the compressor body 28 through the evaporator body 3. The compressor body 28 compresses and heats the air. After the air is heated, it enters the high-pressure steam pipe assembly 15 through the first air inlet pipe 13. During this period, the cold water inside the water tank 1 will be heated, and the hot air will become a refrigerant after releasing heat. The refrigerant enters the expansion valve body 29 through the high-pressure air outlet pipe 14, and the refrigerant enters the evaporator body 3 through the expansion valve body 29. At this time, the pressure drops instantly and becomes low-temperature and low-pressure air again. Finally, the cold air is absorbed by the compressor body 28 to form a cycle. According to the use requirements, the three-mode switching can be performed to heat, cool or keep the water inside the water tank 1 at room temperature, which greatly improves the functionality of use.

[0034] In the second step, after the high-pressure air pipe assembly 15 has been in the water tank 1 for a long time, a large amount of scale will be generated on the surface of the high-pressure air pipe assembly 15. At this time, the cleaning rack 17 can be started, and the multiple driving assemblies 26 on both sides of the cleaning rack 17 are started. The driving assembly 26 starts to drive the pulley 27 to rotate, and the pulley 27 rotates on the surface of the high-pressure air pipe assembly 15 and drives the cleaning rack 17 to move forward. The cleaning rack 17 moves around the high-pressure air pipe assembly 15. When the cleaning rack 17 moves, it drives the multiple first scraping die dies 18 and the brush head 19 on the inner wall to move. The movement of the first scraping die dies 18 and the brush head 19 will clean the surface of the high-pressure air pipe assembly 15. By using the cleaning rack 17 to clean the surface of the high-pressure air pipe assembly 15, there is no need to disassemble the water tank 1, which greatly improves the convenience of cleaning and can maintain the performance of the high-pressure air pipe assembly 15;

[0035] When the cleaning frame 17 moves to the corner of the high-pressure air pipe assembly 15, the movement of the cleaning frame 17 will drive the multiple wheel frame assemblies 23 to rotate. The multiple wheel frame assemblies 23 rotate through the rotating shaft 25, and the rotation of the wheel frame assembly 23 drives the spring 24 to compress and deform. The wheel frame assembly 23 is designed to be steerable, which can improve the mobility of the cleaning frame 17 and improve the smoothness of the movement of the cleaning frame 17 in the high-pressure air pipe assembly 15. At the same time, the first scraping die 18 and the brush head 19 are used. Two cleaning mechanisms can improve the cleaning ability of the high-pressure air pipe assembly 15.

[0036] In the third step, after the evaporator body 3 has been used for a long time, a large amount of dust will form on the surface of the evaporator body 3. At this time, the two lifting assemblies 31 are started. The two lifting assemblies 31 are composed of a motor and a threaded rod. The lifting assemblies 31 drive the upper fixed connecting frame 32 to move downward through the threaded rod. The upper fixed connecting frame 32 moves downward to drive the cleaning frame assembly 35 and the sponge cleaning bar 36 to move downward. The sponge cleaning bar 36 moves downward to scrape and clean the surface of the evaporator body 3, thereby cleaning the dust on the surface of the evaporator body 3, thereby improving the performance of the evaporator body 3 and preventing the evaporator body 3 from failing to operate normally due to dust blockage.

[0037] When the upper fixed connecting frame 32 moves downward, the high-pressure ventilation valve 37 is started, and the high-pressure ventilation valve 37 connects the second air intake pipe 38 with the compressor body 28. At this time, the compressor body 28 delivers high-pressure air to the high-pressure ventilation valve 37, and then delivers it into the upper fixed connecting frame 32 through the third air intake pipe 39. The upper fixed connecting frame 32 is discharged through multiple high-pressure nozzles 34. The high-pressure nozzles 34 impact the high-pressure gas onto the surface of the evaporator body 3. At this time, the dust on the surface of the evaporator body 3 will fall off quickly after being stressed, and when frosting in winter, the high-pressure gas sprayed by the high-pressure nozzles 34 can accelerate the melting of the frost and maintain the operating performance of the evaporator body 3 in winter.

[0038] The embodiments of the present invention are given for the purpose of illustration and description, and are not intended to be exhaustive or to limit the invention to the disclosed forms. Many modifications and variations will be apparent to those of ordinary skill in the art. The embodiments are selected and described in order to better illustrate the principles and practical applications of the present invention and to enable those of ordinary skill in the art to understand the present invention and thereby design various embodiments with various modifications suitable for specific uses.

Claims

1. A three-mode adjustable heat pump device, comprising a water tank (1) and a condenser chassis (4), characterized in that: A high-pressure air pipe assembly (15) is arranged inside the water tank (1), and a first air inlet pipe (13) and a high-pressure air outlet pipe (14) are fixedly installed at the upper and lower ends of the high-pressure air pipe assembly (15), respectively; a compressor body (28) and an expansion valve body (29) are installed inside the condenser case (4), the first air inlet pipe (13) is fixedly connected to the compressor body (28), the high-pressure air outlet pipe (14) is fixedly connected to the expansion valve body (29), an evaporator body (3) is fixedly installed inside the condenser case (4), and the compressor body (28) and the expansion valve body (29) are connected to the evaporator body (3) through pipelines; Wherein, the connection points between the high-pressure air pipe assembly (15) and the first air inlet pipe (13) and the high-pressure air outlet pipe (14) are fixedly installed with a connecting pipe sleeve (16); the surface of the high-pressure air pipe assembly (15) is sleeved with a cleaning frame (17); the front and rear sides of the cleaning frame (17) are provided with a fixing frame (2); the side of each fixing frame (2) is provided with a wheel frame assembly (23); the end of each wheel frame assembly (23) is provided with a pulley (27); each pulley (27) is in contact with the surface of the high-pressure air pipe assembly (15); Two groups of lifting assemblies (31) are fixedly mounted on the inner wall of the condenser case (4); an upper fixed connecting frame (32) is mounted between the threaded rods of the two groups of lifting assemblies (31); and a cleaning frame assembly (35) is fixedly mounted below the upper fixed connecting frame (32).

2. A three-mode adjustable heat pump device as claimed in claim 1, characterized in that: At least two first scraping knife dies (18) are fixedly installed at equal intervals on the inner wall of the cleaning frame (17), and at least two brush heads (19) are fixedly installed at equal intervals on the inner wall of the cleaning frame (17) between each two first scraping knife dies (18).

3. A three-mode adjustable heat pump device as claimed in claim 1, characterized in that: A groove (21) is provided at the side end of each of the fixing frames (2), a side end of each of the wheel frame components (23) is located in the groove (21), and a rotating shaft (25) is rotatably installed between the side end of the wheel frame component (23) and the inner wall of the groove (21).

4. A three-mode adjustable heat pump device as claimed in claim 3, characterized in that: A spring (24) is fixedly installed between the side end of each wheel frame assembly (23) and the inner wall of the groove (21), and a driving assembly (26) is fixedly installed between each pulley (27) and the wheel frame assembly (23).

5. A three-mode adjustable heat pump device as claimed in claim 4, characterized in that: Two limiting strips (22) are fixedly mounted on the side ends of each of the fixing frames (2), and the limiting strips (22) are used to limit the rotation angle of the wheel frame assembly (23).

6. A three-mode adjustable heat pump device as claimed in claim 1, characterized in that: A nozzle connection frame (33) is fixedly mounted on the side wall of the upper fixed connection frame (32), and at least two high-pressure nozzles (34) are fixedly mounted on the side wall of the nozzle connection frame (33).

7. A three-mode adjustable heat pump device as claimed in claim 6, characterized in that: A sponge cleaning strip (36) is fixedly mounted on the side wall of the cleaning frame assembly (35).

8. A three-mode adjustable heat pump device as claimed in claim 1, characterized in that: A high-pressure ventilation valve (37) is fixedly mounted on the top of the condenser case (4), a second air intake pipe (38) is fixedly mounted on the side wall of the high-pressure ventilation valve (37), and the second air intake pipe (38) is connected to the compressor body (28).

9. A three-mode adjustable heat pump device as claimed in claim 8, characterized in that: A third air intake pipe (39) is fixedly installed below the high-pressure ventilation valve (37), and the third air intake pipe (39) is connected to the upper fixed connection frame (32).

10. A three-mode adjustable heat pump device as claimed in claim 1, characterized in that: A water inlet pipe (11) and a water outlet pipe (12) are fixedly installed through the side wall of the water tank (1), wherein the water outlet pipe (12) is located at the upper end of the water tank (1) and the water inlet pipe (11) is located at the lower end of the water tank (1).

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