Automobile air conditioner refrigerant recycling and filling system
By introducing a step-down pipeline into the refrigerant recycling system of the automobile air conditioner, the problem that the system cannot effectively recover liquid refrigerant at low suction pressure is solved, and the zero loss of liquid refrigerant and the improvement of refrigerant recycling efficiency is achieved.
Patent Information
- Application Number
- CN202421948285.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-12
- Publication Date
- 2025-06-06
- Estimated Expiration
- 2034-08-12
Smart Images
Figure CN222951273U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of automobile air-conditioning refrigeration, in particular to an automobile air-conditioning refrigerant recovery and filling system. Background Art
[0002] After a period of use, impurities, water vapor and incompressible gases will be mixed into the internal circulation system of the car air conditioner and mixed with the car air conditioner refrigerant, causing the car air conditioner refrigeration efficiency to decrease and causing damage to the internal parts of the car air conditioner. Therefore, it is necessary to use a car air conditioner refrigerant recovery and filling machine to recover, purify, store and refill the refrigerant in the car air conditioning system, thereby saving refrigerant raw materials and avoiding direct discharge of refrigerant into the atmosphere to cause environmental pollution.
[0003] During recycling, the automobile air-conditioning refrigerant recovery and filling machine is connected to the automobile air-conditioning system to recycle the refrigerant of the automobile air-conditioning into the machine. The refrigerant and refrigeration oil are separated by a heat exchange oil separator in the machine, and the separated waste oil is discharged through an oil discharge device. The water vapor and impurities mixed in the refrigerant are filtered through a dry filter. The purified refrigerant is cooled and depressurized by a condenser and recycled to the refrigerant storage tank in the machine. The machine is also equipped with a refrigeration oil filling bottle. After the recycling work is completed, the automobile air-conditioning system is vacuumed and purified by the vacuum system in the machine. When the automobile air-conditioning system reaches a vacuum state, the pressure difference and control system are used to quantitatively add refrigerant and refrigeration oil to the automobile air-conditioning system. However, this recycling method has the following defects:
[0004] When the suction pressure of the compressor approaches atmospheric pressure, the exhaust pressure of the compressor will be lower than the pressure in the condenser and the refrigerant storage tank. The large amount of liquid refrigerant remaining in the exhaust pipe of the compressor, the condenser, and the intake pipe of the refrigerant storage tank cannot be recovered into the refrigerant storage tank. At this time, the refrigerant storage tank cannot accurately display the actual amount of refrigerant recovered, and when the automobile air conditioner is vacuumed, the large amount of liquid refrigerant remaining in the filling machine system will also be discharged. The above defects seriously limit the refrigerant recovery efficiency of the automobile air conditioner refrigerant recovery and filling machine, and cannot accurately measure the actual amount of refrigerant recovered, which increases the loss of automobile air conditioner refrigerant and causes environmental pollution. Utility Model Content
[0005] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide an automobile air-conditioning refrigerant recovery and filling system which can improve the refrigerant recovery efficiency and avoid liquid refrigerant remaining in the system pipeline.
[0006] The technical solution adopted by the utility model is: the utility model includes a liquid storage tank, a refrigeration compressor and an automobile air-conditioning system, the liquid storage tank is provided with a liquid refrigerant cavity and a gaseous refrigerant cavity, the liquid storage tank is connected with a refrigerant filling pipe, a liquid refrigerant recovery pipe and a pressure reducing pipeline, one end of the refrigerant filling pipe is connected to the liquid refrigerant cavity, and the other end is connected to the automobile air-conditioning system, the automobile air-conditioning system is connected to the refrigeration compressor through a recovery pipeline, the refrigeration compressor is connected to the liquid refrigerant cavity through the liquid refrigerant recovery pipe, one end of the pressure reducing pipeline is connected to the gaseous refrigerant cavity, and the other end is connected to the refrigeration compressor, and the pressure reducing pipeline is connected with a control valve and a pressure sensor.
[0007] Furthermore, the automobile air-conditioning refrigerant recovery and filling system also includes a compressor oil separator, a heat exchange oil separator, a condenser and a drying filter. The liquid refrigerant recovery pipe is connected to the refrigeration compressor, the compressor oil separator, the heat exchange oil separator, the condenser and the liquid refrigerant cavity in sequence. The recovery pipeline is connected to the automobile air-conditioning system, the heat exchange oil separator, the drying filter and the refrigeration compressor in sequence. The compressor oil separator has an oil return end, which is connected to the refrigeration compressor. The heat exchange oil separator has a waste oil discharge end.
[0008] Furthermore, an electronic weighing scale is provided at the bottom of the liquid storage tank.
[0009] Furthermore, the refrigerant filling pipe is connected to the liquid refrigerant cavity through a first one-way valve, and the liquid refrigerant recovery pipe is connected to the liquid refrigerant cavity through a second one-way valve.
[0010] Furthermore, one end of the liquid refrigerant recovery pipe is connected to the bottom of the liquid refrigerant cavity.
[0011] Furthermore, the pressure-reducing pipeline is a capillary pipeline.
[0012] Furthermore, the pressure reducing pipeline has a throttle valve.
[0013] Furthermore, the automobile air conditioning system has a high-pressure end and a low-pressure end, the refrigerant filling pipe and the recovery pipeline are both connected to the high-pressure end, and the refrigerant filling pipe and the recovery pipeline are both connected to the low-pressure end.
[0014] The beneficial effects of the utility model are:
[0015] With respect to the deficiencies of the prior art, in the present utility model, when the suction pressure of the system recovered to the refrigeration compressor is lower than the atmospheric pressure, the exhaust pressure of the refrigeration compressor is lower than the pressure of the liquid storage tank, resulting in part of the liquid refrigerant in the refrigeration compressor being unable to be transported to the liquid storage tank. Therefore, a pressure-reducing pipeline is connected between the gaseous refrigerant cavity and the refrigeration compressor, so that the control valve controls the pressure sensor signal to automatically open, and the refrigeration compressor inhales the reduced-pressure gaseous refrigerant in the pressure-reducing pipeline to increase the suction pressure and exhaust pressure of the refrigeration compressor, thereby achieving complete recovery of the liquid refrigerant remaining in the system pipeline into the liquid storage tank, achieving zero loss of liquid refrigerant, and making the present utility model have the advantages of improving the refrigerant recovery efficiency and avoiding liquid refrigerant remaining in the system pipeline. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.
[0017] Figure 1 It is a schematic diagram of the connection relationship of the utility model.
[0018] The reference numerals are as follows:
[0019] 1. Liquid storage tank; 2. Refrigeration compressor; 3. Automobile air conditioning system; 5. Liquid refrigerant cavity; 6. Gaseous refrigerant cavity; 7. Refrigerant filling pipe; 8. Liquid refrigerant recovery pipe; 9. Pressure reduction pipeline; 10. Recovery pipeline; 11. Control valve; 12. Compressor oil separator; 13. Heat exchange oil separator; 15. Condenser; 16. Dry filter; 17. Oil return end; 18. Waste oil discharge end; 19. Electronic weighing scale; 21. First one-way valve; 22. Second one-way valve; 25. High-pressure end; 26. Low-pressure end.
[0020] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION
[0021] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0022] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, clockwise, counterclockwise, etc., are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture. If the specific posture changes, the directional indication will also change accordingly.
[0023] In addition, the descriptions of "first", "second", etc. in the present utility model are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in this field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.
[0024] like Figure 1 As shown, in this embodiment, the utility model includes a liquid storage tank 1, a refrigeration compressor 2 and an automobile air-conditioning system 3, the liquid storage tank 1 is provided with a liquid refrigerant cavity 5 and a gaseous refrigerant cavity 6, the liquid storage tank 1 is connected with a refrigerant filling pipe 7, a liquid refrigerant recovery pipe 8 and a pressure reducing pipeline 9, one end of the refrigerant filling pipe 7 is connected to the liquid refrigerant cavity 5, and the other end is connected to the automobile air-conditioning system 3, the automobile air-conditioning system 3 is connected to the refrigeration compressor 2 through a recovery pipeline 10, the refrigeration compressor 2 is connected to the liquid refrigerant cavity 5 through the liquid refrigerant recovery pipe 8, one end of the pressure reducing pipeline 9 is connected to the gaseous refrigerant cavity 6, and the other end is connected to the refrigeration compressor 2, and the pressure reducing pipeline 9 is connected with a control valve 11 and a pressure sensor. Among them, the liquid refrigerant in the liquid refrigerant cavity 5 is filled into the automobile air-conditioning system 3 through the refrigerant filling pipe 7; the liquid refrigerant to be recovered is recovered into the liquid refrigerant cavity 5 through the liquid refrigerant recovery pipe 8; the gaseous refrigerant in the gaseous refrigerant cavity 6 is transported to the refrigeration compressor 2 through the pressure reducing pipeline 9.
[0025] With respect to the deficiencies of the prior art, in the present utility model, when the suction pressure of the system recovered to the refrigeration compressor 2 is lower than the atmospheric pressure, the exhaust pressure of the refrigeration compressor 2 is lower than the pressure of the liquid storage tank 1, resulting in part of the liquid refrigerant in the refrigeration compressor 2 being unable to be transported to the liquid storage tank 1. Therefore, a pressure reducing pipeline 9 is connected between the gaseous refrigerant chamber 6 and the refrigeration compressor 2, so that the control valve 11 controls the pressure sensor signal to automatically open, and the refrigeration compressor 2 inhales the gaseous refrigerant after the pressure reduction in the pressure reducing pipeline 9 to increase the suction pressure and exhaust pressure of the refrigeration compressor 2, thereby realizing the complete recovery of the liquid refrigerant remaining in the system pipeline into the liquid storage tank 1, achieving zero loss of liquid refrigerant, and making the present utility model have the advantages of improving the refrigerant recovery efficiency and avoiding liquid refrigerant remaining in the system pipeline.
[0026] In certain embodiments, the automobile air-conditioning refrigerant recovery and filling system further includes a compressor oil separator 12, a heat exchange oil separator 13, a condenser 15 and a drying filter 16, the liquid refrigerant recovery pipe 8 is sequentially connected to the refrigeration compressor 2, the compressor oil separator 12, the heat exchange oil separator 13, the condenser 15 and the liquid refrigerant chamber 5, the recovery pipeline 10 is sequentially connected to the automobile air-conditioning system 3, the heat exchange oil separator 13, the drying filter 16 and the refrigeration compressor 2, the compressor oil separator 12 has an oil return end 17, the oil return end 17 is connected to the refrigeration compressor 2, and the heat exchange oil separator 13 has a waste oil discharge end 18. Specifically, during filling, the liquid refrigerant in the liquid refrigerant cavity 5 is filled into the automobile air-conditioning system 3 through the refrigerant filling pipe 7; during recovery, through the setting of the compressor oil separator 12, the lubricating oil in the high-pressure steam discharged from the refrigeration compressor 2 can be separated, and the lubricating oil is transported back to the refrigeration compressor 2 for use through the return oil end 17, and the refrigerant and waste oil are further separated by the heat exchange oil separator 13, and the waste oil is discharged, and the liquid refrigerant after heat dissipation and pressure reduction through the condenser 15 is further recovered into the liquid refrigerant cavity 5.
[0027] In some embodiments, an electronic weighing scale 19 is provided at the bottom of the liquid storage tank 1. Specifically, when the liquid refrigerant is recovered, the electronic weighing scale 19 measures the amount of refrigerant actually recovered, and the recovery process is stopped when the electronic weighing scale 19 shows no weight change.
[0028] In some embodiments, the refrigerant filling pipe 7 is connected to the liquid refrigerant cavity 5 through a first one-way valve 21, and the liquid refrigerant recovery pipe 8 is connected to the liquid refrigerant cavity 5 through a second one-way valve 22; one end of the liquid refrigerant recovery pipe 8 is connected to the bottom of the liquid refrigerant cavity 5. Specifically, by connecting one end of the liquid refrigerant recovery pipe 8 to the bottom of the liquid refrigerant cavity 5, it is ensured that the liquid refrigerant is recovered to the bottom of the liquid storage tank 1.
[0029] In some embodiments, the depressurization pipeline 9 is a capillary pipeline or the depressurization pipeline 9 has a throttle valve. Specifically, the gaseous refrigerant can be depressurized by the capillary pipeline, or throttled and depressurized by the throttle valve.
[0030] In some embodiments, the automobile air-conditioning system 3 has a high-pressure end 25 and a low-pressure end 26, the refrigerant filling pipe 7 and the recovery pipe 10 are both connected to the high-pressure end 25, and the refrigerant filling pipe 7 and the recovery pipe 10 are both connected to the low-pressure end 26.
[0031] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the inventive concept of the present invention, or directly / indirectly applied in other related technical fields are included in the patent protection scope of the present invention.
Claims
1. A car air conditioning refrigerant recovery and filling system, characterized by: The invention comprises a liquid storage tank (1), a refrigeration compressor (2) and an automobile air conditioning system (3). The liquid storage tank (1) is provided with a liquid refrigerant cavity (5) and a gaseous refrigerant cavity (6). The liquid storage tank (1) is connected with a refrigerant filling pipe (7), a liquid refrigerant recovery pipe (8) and a pressure reducing pipeline (9). One end of the refrigerant filling pipe (7) is connected to the liquid refrigerant cavity (5), and the other end is connected to the automobile air conditioning system (3). The automobile air conditioning system (3) is connected to the refrigeration compressor (2) through a recovery pipeline (10). The refrigeration compressor (2) is connected to the liquid refrigerant cavity (5) through the liquid refrigerant recovery pipe (8). One end of the pressure reducing pipeline (9) is connected to the gaseous refrigerant cavity (6), and the other end is connected to the refrigeration compressor (2). The pressure reducing pipeline (9) is connected with a control valve (11) and a pressure sensor.
2. The automobile air conditioning refrigerant recovery and filling system according to claim 1 is characterized in that: The automobile air conditioning refrigerant recovery and filling system also includes a compressor oil separator (12), a heat exchange oil separator (13), a condenser (15) and a drying filter (16); the liquid refrigerant recovery pipe (8) is connected to the refrigeration compressor (2), the compressor oil separator (12), the heat exchange oil separator (13), the condenser (15) and the liquid refrigerant chamber (5) in sequence; the recovery pipeline (10) is connected to the automobile air conditioning system (3), the heat exchange oil separator (13), the drying filter (16) and the refrigeration compressor (2) in sequence; the compressor oil separator (12) has an oil return end (17), and the oil return end (17) is connected to the refrigeration compressor (2); the heat exchange oil separator (13) has a waste oil discharge end (18).
3. The automobile air conditioning refrigerant recovery and filling system according to claim 1 is characterized in that: An electronic weighing scale (19) is provided at the bottom of the liquid storage tank (1).
4. The automobile air conditioning refrigerant recovery and filling system according to claim 1 is characterized in that: The refrigerant filling pipe (7) is connected to the liquid refrigerant cavity (5) via a first one-way valve (21), and the liquid refrigerant recovery pipe (8) is connected to the liquid refrigerant cavity (5) via a second one-way valve (22).
5. The automobile air conditioning refrigerant recovery and filling system according to claim 1 is characterized in that: One end of the liquid refrigerant recovery pipe (8) is connected to the bottom of the liquid refrigerant chamber (5).
6. The automobile air conditioning refrigerant recovery and filling system according to claim 1 is characterized in that: The pressure-reducing pipeline (9) is a capillary pipeline.
7. The automobile air conditioning refrigerant recovery and filling system according to claim 1 is characterized in that: The pressure reducing pipeline (9) has a throttle valve.
8. A vehicle air conditioning refrigerant recovery and filling system according to any one of claims 1 to 7, characterized in that: The automobile air conditioning system (3) has a high-pressure end (25) and a low-pressure end (26), the refrigerant filling pipe (7) and the recovery pipeline (10) are both connected to the high-pressure end (25), and the refrigerant filling pipe (7) and the recovery pipeline (10) are both connected to the low-pressure end (26).