Oil content detection pipeline for refrigerant recovery filling machine
By designing an oil content detection pipeline and using a liquid pump and solenoid valve to control the refrigerant flow, combined with an oil content detector, the problem of the refrigerant recovery and charging machine being unable to detect the oil content was solved, thus achieving accurate detection and control of the refrigerant oil content in the air conditioning system.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-12
- Publication Date
- 2026-04-03
AI Technical Summary
Existing refrigerant recovery and charging machines cannot detect the oil content of refrigerant in air conditioning systems, resulting in the added refrigerant having an oil content that does not meet requirements.
An oil content detection pipeline was designed, including a liquid pump, an air conditioning connection pipe, a solenoid valve, and an oil content detector. The flow and detection of refrigerant in the pipeline are realized by controlling the solenoid valve, and the oil content of the refrigerant is monitored in real time by the oil content detector.
It enables precise detection and control of the oil content in refrigerants in air conditioning systems, ensuring that the refrigerant addition meets requirements and improving the quality of refrigerant recovery and charging.
Smart Images
Figure CN224080465U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of automotive technology, and more specifically, it relates to an oil content detection pipeline for a refrigerant recovery and charging machine. Background Technology
[0002] An automotive refrigerant recovery and recharge machine is a device used to recover and recharge refrigerant into an automotive air conditioning system. Currently available refrigerant recovery and recharge machines generally lack the function of detecting the oil content of the refrigerant in the air conditioning system, and they also cannot detect the oil content of the added refrigerant when recharging the system. This can easily lead to problems where the oil content of the refrigerant in the air conditioning system does not meet the set requirements. Summary of the Invention
[0003] The purpose of this invention is to provide an oil content detection pipeline for a refrigerant recovery and charging machine, so as to overcome the problem that the existing refrigerant charging machine cannot detect the oil content of the refrigerant.
[0004] This utility model is achieved by the following technical solution: an oil content detection pipeline for a refrigerant recovery and charging machine, comprising a liquid pump and an air conditioning connection pipe, wherein the air conditioning connection pipe is connected to a first pipeline and a second pipeline respectively, and a first solenoid valve and a second solenoid valve are respectively installed on the first pipeline and the second pipeline, wherein the liquid inlet of the liquid pump is connected to an inlet pipe, the inlet pipe is connected to the first pipeline, the liquid outlet of the liquid pump is connected to the second pipeline, and an oil content detector is installed on the inlet pipe.
[0005] Furthermore, it also includes a mixing storage tank, on which a fourth pipeline and a third pipeline are respectively installed on the upper and lower sides. A third solenoid valve and a fourth solenoid valve are respectively installed on the third pipeline and the fourth pipeline. The inlet pipe 7 is also connected to the third pipeline, and the outlet of the liquid pump is also connected to the fourth pipeline.
[0006] Furthermore, a drain pipe is installed at the bottom of the mixing storage tank, and a valve is installed on the drain pipe.
[0007] Furthermore, a stirrer is installed on the top of the mixing tank.
[0008] Furthermore, one end of the air conditioning connecting pipe is connected to the branch pipes on both sides via a tee pipe.
[0009] Compared with the prior art, the beneficial effects of this utility model are:
[0010] This invention can detect the oil content of refrigerant in an air conditioning system. When testing the refrigerant, only the first solenoid valve on the first pipeline needs to be opened, while the other solenoid valves are closed. Driven by the pressure difference, the refrigerant in the air conditioning system will quickly enter the inlet pipe of the liquid pump. Simultaneously, the refrigerant passes through an oil content detector, which measures the oil content of the passing refrigerant, thus enabling the detection of the oil content of the refrigerant in the air conditioning system. After the detection is complete, the first solenoid valve on the first pipeline can be closed, and the second solenoid valve on the second pipeline and the liquid pump can be opened, while the other solenoid valves remain closed. At this point, the liquid pump can re-pump the refrigerant into the air conditioning system.
[0011] This invention can detect the oil content of refrigerant reintroduced into an air conditioning system and the oil content of refrigerant recovered from the air conditioning system. The mixing reservoir can store refrigerant recovered from the air conditioning system and mix old and new refrigerant recovered from the air conditioning system. During testing, the first solenoid valve on the first pipeline, the third solenoid valve on the third pipeline, and the liquid pump are opened, while other solenoid valves are closed. The liquid pump pumps the old refrigerant from the air conditioning system into the mixing reservoir. During the process of the old refrigerant entering the mixing reservoir, the oil content detector in the inlet pipe will detect the oil content of the old refrigerant. When the oil content of the mixed refrigerant in the mixing reservoir is detected, the third solenoid valve on the third pipeline, the fourth solenoid valve on the fourth pipeline, and the liquid pump are opened, while other solenoid valves are closed. The mixed refrigerant in the mixing reservoir will exit from the third pipeline and enter from the fourth pipeline. During the circulation process, the mixed refrigerant will pass through the oil content detector on the inlet pipe, and the oil content will be detected by the oil content detector. Attached Figure Description
[0012] Figure 1 , Figure 2 and Figure 3 These are schematic diagrams of the present invention from different directions.
[0013] In the diagram: 1. Liquid pump; 2. Air conditioning connection pipe; 3. First pipeline; 4. Second pipeline; 5. First solenoid valve; 6. Second solenoid valve; 7. Inlet pipe; 8. Oil content detector; 9. Mixing storage tank; 10. Fourth pipeline; 11. Third pipeline; 12. Third solenoid valve; 13. Fourth solenoid valve; 14. Drain pipe; 15. Valve; 16. Agitator; 17. Branch pipe. Detailed Implementation
[0014] To enable those skilled in the art to better understand the technical solutions of this utility model, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort should fall within the scope of protection of this utility model.
[0015] An oil content detection pipeline for a refrigerant recovery and charging machine includes a liquid pump 1 and an air conditioning connection pipe 2. The air conditioning connection pipe 2 is connected to a first pipeline 3 and a second pipeline 4. A first solenoid valve 5 and a second solenoid valve 6 are installed on the first pipeline 3 and the second pipeline 4, respectively. The liquid inlet of the liquid pump 1 is connected to an inlet pipe 7, which is connected to the first pipeline 3. The liquid outlet of the liquid pump 1 is connected to the second pipeline 4. An oil content detector 8 is installed on the inlet pipe 7.
[0016] This invention can detect the oil content of refrigerant in an air conditioning system. To detect the oil content, simply open the first solenoid valve 5 on the first pipeline 3, while closing the other solenoid valves. Driven by the pressure difference, the refrigerant in the air conditioning system will quickly enter the inlet pipe 7 of the liquid pump 1. Simultaneously, the refrigerant will pass through the oil content detector 8, which will detect the oil content of the passing refrigerant, thus enabling the detection of the refrigerant in the air conditioning system. After the detection is complete, we can close the first solenoid valve 5 on the first pipeline 3 and open the second solenoid valve 6 on the second pipeline 4 and the liquid pump 1, while closing the other solenoid valves. At this time, the liquid pump 1 can pump the refrigerant back into the air conditioning system.
[0017] It also includes a mixing storage tank 9, on which a fourth pipeline 10 and a third pipeline 11 are respectively installed on the upper and lower sides. A third solenoid valve 12 and a fourth solenoid valve 13 are respectively installed on the third pipeline 11 and the fourth pipeline 10. The inlet pipe 7 is also connected to the third pipeline 11, and the outlet of the liquid pump 1 is also connected to the fourth pipeline 10.
[0018] This invention can detect the oil content of refrigerant reintroduced into an air conditioning system and the oil content of refrigerant recovered from the air conditioning system. The mixing reservoir 9 can store refrigerant recovered from the air conditioning system and mix old and new refrigerant recovered from the air conditioning system. During testing, the first solenoid valve 5 on the first pipeline 3, the third solenoid valve 12 on the third pipeline 11, and the liquid pump 1 are opened, while other solenoid valves are closed. The liquid pump 1 pumps the old refrigerant from the air conditioning system into the mixing reservoir 9. During process 9, the oil content detector 8 in the liquid inlet pipe 7 will detect the oil content of the old refrigerant. When the oil content of the mixed refrigerant in the mixed liquid storage tank 9 is detected, the third solenoid valve 12 on the third pipeline 11, the fourth solenoid valve 13 on the fourth pipeline 10 and the liquid pump 1 are opened, and the other solenoid valves are closed. The mixed refrigerant in the mixed liquid storage tank 9 will exit from the third pipeline 11 and enter from the fourth pipeline 10. During the circulation process, the mixed refrigerant will pass through the oil content detector 8 on the liquid inlet pipe 7 and the oil content will be detected by the oil content detector 8.
[0019] A drain pipe 14 is installed at the bottom of the mixing tank 9, and a valve 15 is installed on the drain pipe 14. By providing the drain pipe 14, this utility model can easily drain the refrigerant from the mixing tank 9.
[0020] A stirrer 16 is installed on the top of the mixing tank 9. By setting the stirrer 16, the present invention can fully stir the old refrigerant, new refrigerant and lubricating oil in the mixing tank 9, so that the old refrigerant, new refrigerant and lubricating oil are evenly distributed.
[0021] One end of the air conditioning connecting pipe 2 is connected to the two branch pipes 17 via a tee pipe. The connectors on the two branch pipes 17 can be connected to the high-pressure pipe and the low-pressure pipe of the air conditioning system via pipelines, respectively. Electronic pressure gauges are installed on the pipelines connecting the branch pipe 17 to the high-pressure pipe and the pipelines connecting the branch pipe 17 to the low-pressure pipe.
Claims
1. An oil content detection pipeline for a refrigerant recovery and charging machine, characterized in that, It includes a liquid pump (1) and an air conditioning connection pipe (2). The air conditioning connection pipe (2) is connected to a first pipe (3) and a second pipe (4) respectively. A first solenoid valve (5) and a second solenoid valve (6) are installed on the first pipe (3) and the second pipe (4) respectively. The liquid inlet of the liquid pump (1) is connected to an inlet pipe (7), which is connected to the first pipe (3). The liquid outlet of the liquid pump (1) is connected to the second pipe (4). An oil content detector (8) is installed on the inlet pipe (7).
2. The oil content detection pipeline for a refrigerant recovery and charging machine according to claim 1, characterized in that, It also includes a mixing tank (9), on which a fourth pipeline (10) and a third pipeline (11) are installed on the upper and lower sides respectively. A third solenoid valve (12) and a fourth solenoid valve (13) are installed on the third pipeline (11) and the fourth pipeline (10) respectively. The inlet pipe (7) is also connected to the third pipeline (11), and the outlet of the liquid pump (1) is also connected to the fourth pipeline (10).
3. The oil content detection pipeline for a refrigerant recovery and charging machine according to claim 2, characterized in that, A drain pipe (14) is installed at the bottom of the mixing storage tank (9), and a valve (15) is installed on the drain pipe (14).
4. The oil content detection pipeline for a refrigerant recovery and charging machine according to claim 2, characterized in that, A stirrer (16) is installed on the top of the mixing tank (9).
5. The oil content detection pipeline for a refrigerant recovery and charging machine according to claim 1, characterized in that, One end of the air conditioning connecting pipe (2) is connected to the branch pipes (17) on both sides via a tee pipe.