A liquid supplement and impurity removal system for an air conditioning system

Abstract

The utility model discloses a kind of liquid supplementing and impurity removing systems for air conditioning system, air conditioning system includes plate heat exchanger and air heat exchanger, first pipeline and second pipeline are connected between plate heat exchanger and air heat exchanger, and constitute a closed circulation loop, the utility model can be through the setting of impurity removing pipeline, system impurity removal is carried out in air conditioning system production process, specifically, once need to carry out impurity removal operation, then close second electromagnetic valve, open third electromagnetic valve and third hand valve simultaneously, then, cleaning liquid in cleaning tank is discharged from cleaning tank outlet end, then sequentially pass through filter, third electromagnetic valve, second pump, second hand valve, water distributor, air heat exchanger, water collector, plate heat exchanger, liquid storage tank, first hand valve, third hand valve, finally flow into cleaning tank through cleaning tank inlet end.

Description

Technical Field

[0001] This utility model relates to the field of air conditioning technology, specifically to a liquid replenishment and impurity removal system for air conditioning systems. Background Technology

[0002] Natural cooling air conditioning systems using ethylene glycol as a refrigerant are highly efficient refrigeration solutions designed to significantly reduce energy consumption. These systems achieve energy savings by using cold air to cool the circulating ethylene glycol solution when outdoor temperatures are low, thereby reducing or even eliminating compressor operation. Ethylene glycol aqueous solutions are ideal refrigerants in such systems due to their low freezing point, good thermal conductivity, and corrosion resistance. The water pump is the core power unit of this closed-loop system, responsible for driving the continuous circulation of the ethylene glycol solution throughout the system.

[0003] The pump shaft seal is a critical component in a water pump that prevents high-pressure ethylene glycol solution from leaking along the pump shaft clearance. Its function is to maintain stable system pressure, ensure circulation power, and prevent the leakage of toxic ethylene glycol, which could cause safety or environmental problems. It is usually installed at the part of the pump shaft that extends out of the pump casing, and its sealing effect and lifespan directly affect the operating efficiency and reliability of the entire air conditioning system.

[0004] Shaft seals sometimes experience abnormal wear during use. The root cause lies in the fact that impurities such as welding slag and metal fragments generated during system installation and welding cannot be completely removed after the system is closed. These hard particles circulate with the ethylene glycol solution in the closed system, intruding into the precision sealing face of the shaft seal. Under high-speed rotation and pressure, these impurities act like a "grinding wheel," constantly scraping and cutting the relatively soft sealing ring material, causing scratches and grooves on the sealing surface, disrupting its smoothness, and ultimately leading to seal failure and increased leakage. This abrasive wear caused by solid particles is one of the common failure modes of mechanical seals.

[0005] Therefore, how to overcome the shortcomings of the existing technology mentioned above has become the subject of this utility model. Utility Model Content

[0006] This invention provides a liquid replenishment and impurity removal system for air conditioning systems, aiming to solve the technical problems mentioned in the background art.

[0007] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a liquid replenishment and impurity removal system for an air conditioning system, used for liquid replenishment and impurity removal during the production process of an air conditioning system. The air conditioning system includes a plate heat exchanger and an air heat exchanger. A first pipeline and a second pipeline are connected between the plate heat exchanger and the air heat exchanger, forming a closed circulation loop. In use, the medium flows out from the plate heat exchanger and sequentially passes through the first pipeline, the air heat exchanger, and the second pipeline before flowing back to the plate heat exchanger. Along the direction of medium flow, a liquid storage tank, a first hand valve, a first pump, and a water distributor are sequentially arranged on the first pipeline, and a water collector is provided on the second pipeline. The liquid replenishment and impurity removal system also includes a water tank, a third pipeline, a second solenoid valve, a second pump, and a second hand valve. The water tank is connected to the first pipeline through the third pipeline. The end of the third pipeline is located at the medium inlet end of the water distributor to allow the medium in the water tank to flow into the circulation loop. Along the direction of medium flow into the circulation loop, the second solenoid valve and the second pump are located on the third pipeline. The system includes a cleaning tank, a filter, a fourth pipeline, and a fifth pipeline. The filter is located on the fourth pipeline. One end of the fourth pipeline is connected to the outlet of the cleaning tank, and the other end is connected to the third pipeline and located between the second solenoid valve and the second pump. A third solenoid valve is also located on the fourth pipeline, which is located on the side of the filter away from the cleaning tank. One end of the fifth pipeline is connected to the inlet of the cleaning tank, and the other end is connected to the first pipeline and located between the first hand valve and the first pump. A third hand valve is also located on the fifth pipeline. When either the third or second solenoid valve is open, the other is closed. When the second solenoid valve is closed, the third solenoid valve and the third hand valve are open. The cleaning tank outlet, filter, third solenoid valve, second pump, second hand valve, water distributor, air heat exchanger, water collector, plate heat exchanger, storage tank, first hand valve, third hand valve, and cleaning tank inlet form a purification pipeline for the medium to flow.

[0008] In the above scheme, system impurity removal can be performed during the air conditioning system production process through the installation of impurity removal pipelines. Specifically, during liquid replenishment, the medium in the water tank flows into the circulation loop sequentially through the second solenoid valve, the second pump, and the second hand valve to achieve liquid replenishment. Once impurity removal is required, the second solenoid valve is closed, while the third solenoid valve and the third hand valve are opened simultaneously. Then, the cleaning liquid in the cleaning tank is discharged from the outlet of the cleaning tank, and then sequentially passes through the filter, the third solenoid valve, the second pump, the second hand valve, the water distributor, the air heat exchanger, the water collector, the plate heat exchanger, the liquid storage tank, the first hand valve, and the third hand valve, and finally flows into the cleaning tank through the inlet of the cleaning tank. This ensures that impurities in the circulation loop are carried to the cleaning tank by the cleaning liquid, preventing abrasive wear caused by solid particles.

[0009] In the above solution, the cleaning solution is water, and a descaling agent can be added or other solutions can be replaced if necessary.

[0010] In the above scheme, the water in the water tank is fed to the first pump through the second solenoid valve, the second pump, the second hand valve, the water distributor, the air heat exchanger, the water collector, the plate heat exchanger, the liquid storage tank, and the first hand valve to achieve the liquid replenishment operation.

[0011] A further technical solution is that the liquid replenishment and impurity removal system also includes an air blowing branch, which includes an air blowing pipeline and a first solenoid valve; one end of the air blowing pipeline is connected to a third pipeline and is located between the second pump and the second hand valve, and the other end of the air blowing pipeline serves as an injection end for injecting gas into the air blowing pipeline.

[0012] With the above design, the cleaning fluid can be recycled back to the cleaning tank for reuse.

[0013] It is important to note that the gas injected into the blowing air pipe can be nitrogen or other gases that will not damage the air conditioning system or pose a safety hazard. At the same time, it is also necessary to ensure that the cleaning fluid can be recovered into the cleaning tank.

[0014] A further technical solution is that when the first solenoid valve is open, both the second and third solenoid valves are closed; when the third solenoid valve is open, both the first and second solenoid valves are closed; when the second solenoid valve is open, both the first and third solenoid valves are closed; when the first solenoid valve is open, both the second and third solenoid valves are closed, and the second, first, and third hand valves are all open. The first solenoid valve, the second hand valve, the water distributor, the air heat exchanger, the water collector, the plate heat exchanger, the liquid storage tank, the first hand valve, the third hand valve, and the inlet end of the cleaning tank constitute an air blowing pipeline.

[0015] Specifically, after the impurity removal pipeline completes the impurity removal of the air conditioning system, the blowing pipeline will work, that is, the first solenoid valve opens, the second and third solenoid valves are closed, and the second, first and third hand valves are all open. Then, nitrogen gas will enter from the blowing pipeline. Subsequently, the gas flows sequentially from the first solenoid valve through the second hand valve, water distributor, air heat exchanger, water collector, plate heat exchanger, liquid storage tank, first hand valve, third hand valve until the inlet of the cleaning tank, so that the cleaning fluid is recovered.

[0016] In a further technical solution, the cleaning tank is also provided with a water inlet and a drain outlet; the outlet end of the cleaning tank is located at the bottom edge of the cleaning tank, the inlet end of the cleaning tank is located at the top of the cleaning tank, the water inlet is located on the periphery of the cleaning tank, and the drain outlet is located at the bottom of the cleaning tank.

[0017] The water inlet can be connected to an external tap water supply.

[0018] In a further technical solution, the drain outlet is connected to a drain pipe, and a fourth manual valve is provided on the drain pipe.

[0019] Opening the fourth valve allows the cleaning solution in the cleaning tank to be drained from the drain outlet through the drain pipe.

[0020] The terms "first," "second," etc., used in this article do not specifically refer to order or sequence, nor are they intended to limit this case; they are merely used to distinguish components or operations described using the same technical terms.

[0021] The terms "connection" or "positioning" as used in this article can refer to two or more components or devices making direct physical contact with each other, or making indirect physical contact with each other, or to two or more components or devices operating or moving with each other.

[0022] The terms “include,” “including,” and “have” used in this article are all open-ended, meaning they include but are not limited to.

[0023] Unless otherwise specified, the terms used herein generally have their ordinary meaning in the context of the art, the subject matter, and the specific context. Certain terms used to describe this case will be discussed below or elsewhere in this specification to provide additional guidance to those skilled in the art in describing the case.

[0024] The terms “front,” “back,” “up,” “down,” “left,” and “right” used in this article are directional terms. In this case, they are only used to describe the positional relationship between the structures and are not intended to limit the specific direction of the protection scheme or its actual implementation.

[0025] The working principle and advantages of this utility model are as follows: This invention enables system impurity removal during the air conditioning system production process through the installation of a purification pipeline. Specifically, during liquid replenishment, the medium in the water tank flows into the circulation loop sequentially through the second solenoid valve, the second pump, and the second hand valve. Once impurity removal is required, the second solenoid valve is closed, while the third solenoid valve and the third hand valve are opened simultaneously. Then, the cleaning liquid in the cleaning tank is discharged from the outlet of the cleaning tank, and then sequentially passes through the filter, the third solenoid valve, the second pump, the second hand valve, the water distributor, the air heat exchanger, the water collector, the plate heat exchanger, the storage tank, the first hand valve, and the third hand valve, finally flowing into the cleaning tank through the inlet of the cleaning tank.

[0026] In this invention, water in the water tank is fed to the first pump via a second solenoid valve, a second pump, a second hand valve, a water distributor, an air heat exchanger, a water collector, a plate heat exchanger, a storage tank, and a first hand valve to achieve a liquid replenishment operation. Attached Figure Description

[0027] Appendix Figure 1 This is a schematic diagram of the overall structure in an embodiment of the present utility model; Appendix Figure 2This is a schematic diagram of the impurity removal pipeline structure in an embodiment of this utility model; Appendix Figure 3 This is a schematic diagram of the air blowing branch structure in an embodiment of the present utility model; Appendix Figure 4 This is a schematic diagram of the structure for implementing the fluid replenishment operation in an embodiment of the present invention.

[0028] In the attached diagrams: 1. Plate heat exchanger; 2. Air heat exchanger; 3. First pipeline; 4. Second pipeline; 5. Liquid storage tank; 6. First hand valve; 7. First pump; 8. Water distributor; 9. Water collector; 10. Water tank; 11. Third pipeline; 12. Second solenoid valve; 13. Second pump; 14. Second hand valve; 15. Cleaning tank; 16. Filter; 17. Fourth pipeline; 18. Fifth pipeline; 19. Third solenoid valve; 20. Cleaning tank inlet; 21. Cleaning tank outlet; 22. Third hand valve; 23. Air blowing pipeline; 24. First solenoid valve; 25. Water inlet; 26. Drain outlet; 27. Drain pipeline; 28. Fourth hand valve. Detailed Implementation

[0029] The present invention will be further described below with reference to the accompanying drawings and embodiments: Example: The present invention will be clearly described below with illustrations and detailed description. Any person skilled in the art who understands the examples of the present invention can make changes and modifications based on the technology taught in the present invention without departing from the spirit and scope of the present invention.

[0030] The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the scope of this work. Singular forms such as “a,” “this,” “this,” “the,” and “the” as used herein also include plural forms.

[0031] See appendix Figures 1-4As shown, an air conditioning system replenishment and impurity removal system is used for replenishing liquid and removing impurities during the production process of the air conditioning system. The air conditioning system includes a plate heat exchanger 1 and an air heat exchanger 2. A first pipe 3 and a second pipe 4 are connected between the plate heat exchanger 1 and the air heat exchanger 2, forming a closed circulation loop. In use, the medium flows out from the plate heat exchanger 1, passes through the first pipe 3, the air heat exchanger 2, and the second pipe 4 in sequence, and then flows back to the plate heat exchanger 1. Along the direction of medium flow, a liquid storage tank 5, a first hand valve 6, a first pump 7, and a... are sequentially arranged on the first pipe 3. The water distributor 8 has a water collector 9 on the second pipeline 4; the replenishment and impurity removal system includes a water tank 10, a third pipeline 11, a second solenoid valve 12, a second pump 13, and a second hand valve 14. The water tank 10 is connected to the first pipeline 3 through the third pipeline 11. The end of the third pipeline 11 is located at the medium inlet of the water distributor 8 so that the medium in the water tank 10 flows into the circulation loop. Along the direction of the medium flowing into the circulation loop in the water tank 10, the second solenoid valve 12, the second pump 13, and the second hand valve 14 are sequentially installed on the third pipeline 11; the replenishment and impurity removal system also includes a cleaning tank. 15. Filter 16, fourth pipeline 17, and fifth pipeline 18. Filter 16 is installed on fourth pipeline 17. One end of fourth pipeline 17 is connected to the outlet 21 of the cleaning tank, and the other end is connected to third pipeline 11 and located between second solenoid valve 12 and second pump 13. A third solenoid valve 19 is also installed on fourth pipeline 17, and the third solenoid valve 19 is located on the side of filter 16 away from cleaning tank 15. One end of fifth pipeline 18 is connected to the inlet 20 of the cleaning tank, and the other end is connected to first pipeline 3 and located between first hand valve 6 and first pump 7. A third hand valve 22 is provided on the fifth pipeline 18; wherein, when one of the third solenoid valve 19 and the second solenoid valve 12 is open, the other is closed; when the second solenoid valve 12 is closed, the third solenoid valve 19 and the third hand valve 22 are open, and the outlet end of the cleaning tank 15, the filter 16, the third solenoid valve 19, the second pump 13, the second hand valve 14, the water distributor 8, the air heat exchanger 2, the water collector 9, the plate heat exchanger 1, the liquid storage tank 5, the first hand valve 6, the third hand valve 22 and the inlet end of the cleaning tank 15 form a clean pipeline for the medium to flow.

[0032] In this invention, impurities in the air conditioning system can be removed during the air conditioning system production process through the installation of a purification pipeline. Specifically, during liquid replenishment, the medium in the water tank 10 flows into the circulation loop sequentially through the second solenoid valve 12, the second pump 13, and the second hand valve 14 to achieve liquid replenishment. Once impurity removal is required, the second solenoid valve 12 is closed, and the third solenoid valve 19 and the third hand valve 22 are opened simultaneously. Then, the cleaning liquid in the cleaning tank 15 is discharged from the cleaning tank outlet 21, and then sequentially passes through the filter 16, the third solenoid valve 19, the second pump 13, the second hand valve 14, the water distributor 8, the air heat exchanger 2, the water collector 9, the plate heat exchanger 1, the liquid storage tank 5, the first hand valve 6, and the third hand valve 22, and finally flows into the cleaning tank 15 through the cleaning tank inlet 20.

[0033] In this invention, the cleaning solution is water, and a descaling agent can be added or other solutions can be replaced if necessary.

[0034] In this utility model, the water in the water tank 10 is fed to the first pump 7 via the second solenoid valve 12, the second pump 13, the second hand valve 14, the water distributor 8, the air heat exchanger 2, the water collector 9, the plate heat exchanger 1, the liquid storage tank 5, and the first hand valve 6 to achieve the liquid replenishment operation.

[0035] It is important to note that, such as Figures 1-4 As shown, the plate heat exchanger 1 also has an inlet and outlet for the external heat exchange medium (gas or liquid).

[0036] Preferably, the liquid replenishment and impurity removal system further includes an air blowing branch, which includes an air blowing pipe 23 and a first solenoid valve 24; one end of the air blowing pipe 23 is connected to the third pipe 11 and the end is located between the second pump 13 and the second hand valve 14, and the other end of the air blowing pipe 23 serves as an air injection end for injecting gas into the air blowing pipe 23.

[0037] With the above design, the cleaning fluid can be recycled back to the cleaning tank 15 for reuse.

[0038] It should be noted that the gas injected into the blowing gas line 23 can be nitrogen.

[0039] Preferably, when the first solenoid valve 24 is open, both the second solenoid valve 12 and the third solenoid valve 19 are closed; when the third solenoid valve 19 is open, both the first solenoid valve 24 and the second solenoid valve 12 are closed; when the second solenoid valve 12 is open, both the first solenoid valve 24 and the third solenoid valve 19 are closed; when the first solenoid valve 24 is open, both the second solenoid valve 12 and the third solenoid valve 19 are closed, and the second hand valve 14, the first hand valve 6, and the third hand valve 22 are all open. The first solenoid valve 24, the second hand valve 14, the water distributor 8, the air heat exchanger 2, the water collector 9, the plate heat exchanger 1, the liquid storage tank 5, the first hand valve 6, the third hand valve 22, and the inlet end 20 of the cleaning box constitute an air blowing pipeline.

[0040] Specifically, after the impurity removal pipeline completes the impurity removal of the air conditioning system, the blowing pipeline will work, that is, the first solenoid valve 24 opens, the second solenoid valve 12 and the third solenoid valve 19 are both closed, and the second hand valve 14, the first hand valve 6 and the third hand valve 22 are all opened. Then, nitrogen gas will enter from the blowing pipeline 23. Subsequently, the gas flows sequentially from the first solenoid valve 24 through the second hand valve 14, the water distributor 8, the air heat exchanger 2, the water collector 9, the plate heat exchanger 1, the liquid storage tank 5, the first hand valve 6, the third hand valve 22 and finally to the inlet end 20 of the cleaning tank, so that the cleaning liquid is recovered.

[0041] Preferably, the cleaning tank 15 is further provided with a water inlet 25 and a drain outlet 26; the cleaning tank outlet 21 is located at the bottom edge of the cleaning tank 15, the cleaning tank inlet 20 is located at the top of the cleaning tank 15, the water inlet 25 is located around the cleaning tank 15, and the drain outlet 26 is located at the bottom of the cleaning tank 15.

[0042] Water inlet 25 can be connected to an external tap water supply.

[0043] Preferably, the drain outlet 26 is connected to a drain pipe 27, and a fourth manual valve 28 is provided on the drain pipe 27.

[0044] Opening the fourth hand valve 28 allows the cleaning fluid in the cleaning tank 15 to be discharged from the drain outlet 26 through the drain pipe 27.

[0045] Working principle: The entire system is divided into three parts: liquid replenishment, impurity removal, and air blowing.

[0046] Under normal circumstances, the air conditioning system works normally, that is, the medium flows out from the plate heat exchanger 1 and passes through the liquid storage tank 5, the first hand valve 6, the first pump 7, the water distributor 8, the air heat exchanger 2, and the water collector 9 in sequence before flowing back to the plate heat exchanger 1.

[0047] Once replenishment is required, the second solenoid valve 12, the second pump 13, and the second hand valve 14 are opened, and the third solenoid valve 19 and the third hand valve 22 are closed. Then, the medium in the water tank 10 flows into the circulation loop, that is, the water in the water tank 10 passes through the second solenoid valve 12, the second pump 13, the second hand valve 14, the water distributor 8, the air heat exchanger 2, the water collector 9, the plate heat exchanger 1, the liquid storage tank 5, the first hand valve 6, and the first pump 7 to realize the replenishment operation.

[0048] However, the liquid replenishment operation is often performed after the impurity removal and air blowing operations. That is to say, the air conditioning system is working normally first, then impurities are found in the air conditioning system, then impurities are removed, then air is blown, and finally liquid is replenished.

[0049] The impurity removal operation is as follows: the second solenoid valve 12 is closed, and the third solenoid valve 19 and the third hand valve 22 are opened simultaneously. Then, the cleaning liquid in the cleaning tank 15 is discharged from the outlet 21 of the cleaning tank, and then passes through the filter 16, the third solenoid valve 19, the second pump 13, the second hand valve 14, the water distributor 8, the air heat exchanger 2, the water collector 9, the plate heat exchanger 1, the storage tank 5, the first hand valve 6, and the third hand valve 22 in sequence, and finally flows into the cleaning tank 15 through the inlet 20 of the cleaning tank to achieve impurity removal.

[0050] After the impurity removal system completes the impurity removal of the air conditioning system, the blowing pipe will work, that is, the first solenoid valve 24 will open, the second solenoid valve 12 and the third solenoid valve 19 will both close, and the second hand valve 14, the first hand valve 6 and the third hand valve 22 will all open. Then, nitrogen will enter from the blowing pipe 23. Subsequently, the gas flows sequentially from the first solenoid valve 24 through the second hand valve 14, the water distributor 8, the air heat exchanger 2, the water collector 9, the plate heat exchanger 1, the liquid storage tank 5, the first hand valve 6, the third hand valve 22 and finally to the inlet end 20 of the cleaning tank, so that the cleaning liquid is recovered.

[0051] The above embodiments are only for illustrating the technical concept and features of this utility model, and are intended to enable those skilled in the art to understand the content of this utility model and implement it accordingly. They should not be construed as limiting the scope of protection of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be included within the scope of protection of this utility model.

Claims

1. A liquid replenishment and impurity removal system for an air conditioning system, used for liquid replenishment and impurity removal during the production process of the air conditioning system. The air conditioning system includes a plate heat exchanger and an air heat exchanger. A first pipeline and a second pipeline are connected between the plate heat exchanger and the air heat exchanger, forming a closed circulation loop. In use, the medium flows out from the plate heat exchanger and flows back to the plate heat exchanger after passing through the first pipeline, the air heat exchanger, and the second pipeline in sequence. Along the direction of medium flow, a liquid storage tank, a first hand valve, a first pump, and a water distributor are sequentially arranged on the first pipeline, and a water collector is provided on the second pipeline. Its features are: The liquid replenishment and impurity removal system includes a water tank, a third pipeline, a second solenoid valve, a second pump, and a second hand valve. The water tank is connected to the first pipeline through the third pipeline. The end of the third pipeline is located at the medium inlet of the water distributor so that the medium in the water tank flows into the circulation loop. Along the direction of the medium in the water tank flowing into the circulation loop, the second solenoid valve, the second pump, and the second hand valve are sequentially installed on the third pipeline. The liquid replenishment and impurity removal system includes a cleaning tank, a filter, a fourth pipeline and a fifth pipeline. The filter is installed on the fourth pipeline. One end of the fourth pipeline is connected to the outlet of the cleaning tank, and the other end is connected to the third pipeline and is located between the second solenoid valve and the second pump. The fourth pipeline is equipped with a third solenoid valve, which is located on the side of the filter away from the cleaning tank. One end of the fifth pipeline is connected to the inlet of the cleaning tank, and the other end is connected to the first pipeline. This end is located between the first hand valve and the first pump. A third hand valve is provided on the fifth pipeline. When one of the third solenoid valves or the second solenoid valve is open, the other is closed. When the second solenoid valve is closed, the third solenoid valve and the third hand valve are opened, forming a cleanup pipeline from the outlet of the cleaning tank, the filter, the third solenoid valve, the second pump, the second hand valve, the water distributor, the air heat exchanger, the water collector, the plate heat exchanger, the liquid storage tank, the first hand valve, the third hand valve, and the inlet of the cleaning tank.

2. The liquid replenishment and impurity removal system for an air conditioning system according to claim 1, characterized in that: The liquid replenishment and impurity removal system also includes an air blowing branch, which includes an air blowing pipe and a first solenoid valve; One end of the air blowing line is connected to the third line, and this end is located between the second pump and the second hand valve. The other end of the air blowing line serves as the air injection end, used to inject gas into the air blowing line.

3. The liquid replenishment and impurity removal system for an air conditioning system according to claim 2, characterized in that: When the first solenoid valve is open, both the second and third solenoid valves are closed. When the third solenoid valve is open, both the first and second solenoid valves are closed. When the second solenoid valve is open, both the first and third solenoid valves are closed. When the first solenoid valve is opened, the second and third solenoid valves are closed, and the second, first, and third hand valves are all open. The first solenoid valve, the second hand valve, the water distributor, the air heat exchanger, the water collector, the plate heat exchanger, the liquid storage tank, the first hand valve, the third hand valve, and the inlet of the cleaning tank constitute an air blowing pipeline.

4. The liquid supplement and impurity removal system for an air conditioning system of claim 1, wherein: The cleaning tank is also equipped with a water inlet and a drain outlet; The outlet of the cleaning tank is located at the bottom edge of the cleaning tank, the inlet of the cleaning tank is located at the top of the cleaning tank, the water inlet is located on the periphery of the cleaning tank, and the drain outlet is located at the bottom of the cleaning tank.

5. The liquid supplement and impurity removal system for an air conditioning system according to claim 4, characterized by: The drain outlet is connected to a drain pipe, which is equipped with a fourth manual valve.

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