Refrigerant filling quantity calibration system and method

Abstract

The invention discloses a refrigerant filling quantity calibration system and method, and relates to the technical field of automobile air conditioner refrigerant filling, the refrigerant filling quantity calibration system comprises a vacuum pump, a suction port of the vacuum pump is connected with an air conditioner pipeline, a discharge port of the vacuum pump is connected with a separation device, and the separation device is further connected with a collection device and a refrigerant discharge pipe. The collecting device is connected with the air conditioner pipeline and the high-pressure refrigerant tank, and a pressure gauge is arranged on the air conditioner pipeline. Lubricating oil pumped out when the air conditioner pipeline is vacuumized is separated and stored in the collecting device, in the follow-up refrigerant filling process, the refrigerant flows through the collecting device to bring the lubricating oil back to the air conditioner system, and recycling of the lubricating oil in the automobile air conditioner refrigerant filling quantity calibration process is achieved; and the problems of lubricating oil waste and failure caused by lack of lubrication of the air conditioner compressor are prevented.

Description

Technical Field

[0001] The present invention relates to the field of automobile technology, and in particular to a refrigerant filling amount calibration system and method. Background Art

[0002] At present, in order to calibrate the refrigerant filling amount of the air-conditioning system of an electric truck, the refrigerant needs to be discharged from the vehicle's air-conditioning pipeline first. Since the air-conditioning compressor is also connected in series in the pipeline, the air-conditioning compressor requires lubricating oil during operation. The current method is to add both lubricating oil and refrigerant to the air-conditioning pipeline. This results in the lubricating oil being discharged along with the refrigerant due to the high pressure inside the air-conditioning pipeline while releasing the refrigerant, resulting in a waste of lubricating oil. In the long run, it will also cause the air-conditioning compressor to lack lubrication and malfunction.

[0003] Since the cab of current pure electric trucks cannot be flipped and the air-conditioning compressor is located under the cab, it is very inconvenient to add lubricating oil from the air-conditioning compressor. Therefore, a device is needed that can release the refrigerant in the vehicle's air-conditioning pipeline while recovering the lubricating oil discharged and re-injecting it into the air-conditioning pipeline. Summary of the invention

[0004] The purpose of the present invention is to provide a refrigerant filling quantity calibration system and method, so as to solve the problem that during the refrigerant filling quantity calibration process of the air-conditioning system of an electric truck, the lubricating oil will be discharged along with the refrigerant, causing waste of lubricating oil. In the long run, it will also cause the air-conditioning compressor to lack lubrication and malfunction.

[0005] To achieve the above-mentioned purpose, the present invention provides a refrigerant filling quantity calibration system, including a vacuum pump, the suction port of the vacuum pump is connected to the air-conditioning pipeline, the discharge port of the vacuum pump is connected to the separation device, the separation device is also respectively connected to a collecting device and a refrigerant discharge pipe, the collecting device is respectively connected to the air-conditioning pipeline and the high-pressure refrigerant tank, and a pressure gauge is provided on the air-conditioning pipeline.

[0006] The present application extracts the refrigerant in the air-conditioning pipeline by setting a vacuum pump. During the process of extracting the refrigerant, a certain amount of lubricating oil will be extracted together. The mixture of the refrigerant and the lubricating oil is sent to a separation device for separation treatment, and the lubricating oil is separated and stored in a collecting device. When the vacuum pump draws the air-conditioning management to a vacuum state, the refrigerant is filled, and the collecting device is connected with a high-pressure refrigerant tank. When the refrigerant in the high-pressure refrigerant tank passes through the collecting device, it takes away the lubricating oil in the collecting device and enters the air-conditioning management. When a sudden change in the pressure value in the air-conditioning pipeline is detected, the filling of the refrigerant is stopped, and the amount of refrigerant filled is recorded, which is the amount of refrigerant required for the air conditioner in this model of automobile.

[0007] In a preferred implementation of a refrigerant filling quantity calibration system, a first pipeline valve for controlling the switching state of the refrigerant discharge pipe is provided on the refrigerant discharge pipe, a second pipeline valve is provided on the pipeline connecting the separation device and the collecting device, a third pipeline valve is provided on the pipeline connecting the collecting device and the high-pressure refrigerant tank, and a fourth pipeline valve is provided on the pipeline connecting the collecting device and the air-conditioning pipeline.

[0008] By setting a first pipeline valve to control the discharge state of the refrigerant separated from the separation device, when the first pipeline valve is opened, the refrigerant gas separated in the separation device is discharged through the refrigerant discharge pipe; by setting a second pipeline valve to control the lubricating oil separated from the separation device to enter the collecting device, when the separation device separates the refrigerant and the lubricating oil, the second pipeline valve is opened, and the lubricating oil enters the collecting device through the pipeline connected between the separation device and the collecting device; by setting a third pipeline valve and a fourth pipeline valve, the lubricating oil in the collecting device can be brought back when the refrigerant is added. When the refrigerant is added, the first pipeline valve and the second pipeline valve are closed, and the third pipeline valve and the fourth pipeline valve are opened, and the refrigerant in the high-pressure refrigerant tank enters the collecting device and takes away the lubricating oil and enters the air-conditioning pipeline, so that the refrigerant is filled with lubricating oil and the recycling of the lubricating oil is realized, and the problem of waste caused by the lubricating oil being brought out during the existing refrigerant filling process and the failure of the air-conditioning compressor due to lack of lubricating oil is solved.

[0009] In a preferred implementation of the refrigerant filling quantity calibration system, the first pipeline valve, the second pipeline valve, the third pipeline valve and the fourth pipeline valve are all solenoid valves that can be remotely controlled.

[0010] By configuring the first pipeline valve, the second pipeline valve, the third pipeline valve and the fourth pipeline valve to be remotely controlled solenoid valves, operation is facilitated, and intelligent remote control of the system can be achieved, making operation and use convenient.

[0011] The present application also provides a refrigerant filling amount calibration method, using the above-mentioned refrigerant filling amount calibration system to measure the amount of refrigerant required for the air conditioner in a new model car, the steps comprising:

[0012] Vacuum the air conditioning pipeline;

[0013] Separate the mixture of refrigerant and lubricating oil extracted from the air conditioning pipeline and store the separated lubricating oil;

[0014] Fill the air-conditioning pipeline with refrigerant and let the refrigerant pass through the container storing lubricating oil. Observe the pressure change in the air-conditioning pipeline. If there is a sudden change in the pressure of the air-conditioning pipeline, stop filling the refrigerant. Record the amount of refrigerant filled, which is the calibrated refrigerant filling amount of this model of automobile air-conditioning.

[0015] In a preferred implementation of the refrigerant filling amount calibration method, the pressure value in the air-conditioning pipeline is constantly detected by arranging the pressure gauge in the air-conditioning pipeline.

[0016] In a preferred implementation of a refrigerant filling amount calibration method, the vacuum pump is provided to evacuate the air conditioning pipeline to a vacuum state.

[0017] In a preferred implementation of the refrigerant filling amount calibration method, the mixture of refrigerant and lubricating oil extracted from the air-conditioning pipeline is separated by providing the separation device.

[0018] In a preferred implementation of a refrigerant filling quantity calibration method, the lubricating oil separated by the separation device is stored by providing the collection device.

[0019] In a preferred implementation of a refrigerant filling quantity calibration method, by connecting the high-pressure refrigerant tank at one end of the collection device and connecting the air-conditioning pipeline at the other end, the lubricating oil is driven into the air-conditioning system during the refrigerant filling process, thereby realizing the recovery and utilization of the lubricating oil.

[0020] In a preferred implementation of the refrigerant filling amount calibration method, the refrigerant separated by the separation device is recovered or directly discharged.

[0021] In summary, the present application provides a refrigerant filling amount calibration system and method, which solves the problem that in the prior art, during the automobile refrigerant filling amount calibration process, the refrigerant needs to be discharged from the vehicle's air conditioning pipeline first, and the lubricating oil will also be discharged along with the refrigerant, resulting in a waste of lubricating oil. In the long run, it will also cause the air conditioning compressor to lack lubrication and malfunction. The discharged lubricating oil is separated and stored, and then the lubricating oil is brought back to the air conditioning pipeline for recycling when the refrigerant is added, thereby reducing the waste of lubricating oil and ensuring the normal operation of the air conditioning compressor. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the drawings:

[0023] Figure 1 This is a schematic diagram of the structure of a refrigerant filling amount calibration system of the present invention;

[0024] Figure 2 The present invention is a flow chart of a refrigerant filling amount calibration method.

[0025] List of parts and reference numerals:

[0026] 1. Air conditioning pipeline, 2. Pressure gauge, 3. Vacuum pump, 4. Separation device, 5. First pipeline valve, 6. Refrigerant discharge pipe, 7. Collection device, 8. Third pipeline valve, 9. High-pressure refrigerant tank, 10. Second pipeline valve, 11. Fourth pipeline valve. DETAILED DESCRIPTION

[0027] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in an exemplary manner in conjunction with the accompanying drawings.

[0028] It should be noted that many specific details are set forth in the following description to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0029] In the present invention, the descriptions of "first", "second", etc. 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" or "second" may explicitly or implicitly include at least one of the features.

[0030] like Figure 1 , Figure 2 As shown, the present invention provides a refrigerant filling quantity calibration system, including a vacuum pump 3, the suction port of the vacuum pump 3 is connected to the air-conditioning pipeline 1, the discharge port of the vacuum pump 3 is connected to the separation device 4, the separation device 4 is also respectively connected to a collecting device 7 and a refrigerant discharge pipe 6, the collecting device 7 is respectively connected to the air-conditioning pipeline 1 and the high-pressure refrigerant tank 9, and a pressure gauge 2 is provided on the air-conditioning pipeline 1.

[0031] The present application extracts the refrigerant in the air-conditioning pipeline 1 by setting a vacuum pump 3. During the process of extracting the refrigerant, a certain amount of lubricating oil will be extracted together. The mixture of the refrigerant and the lubricating oil is sent to the separation device 4 for separation treatment, and the lubricating oil is separated and stored in the collecting device 7. After the vacuum pump 3 draws the air-conditioning management to a vacuum state, the refrigerant is filled, and the collecting device 7 is connected with the high-pressure refrigerant tank 9. When the refrigerant in the high-pressure refrigerant tank 9 passes through the collecting device 7, it takes away the lubricating oil in the collecting device 7 and enters the air-conditioning management. When a sudden change in the pressure value in the air-conditioning pipeline 1 is detected, the filling of the refrigerant is stopped, and the amount of refrigerant filled is recorded as the amount of refrigerant required for the air conditioning in this model of automobile.

[0032] In a preferred implementation of a refrigerant filling quantity calibration system, a first pipeline valve 5 for controlling the switching state of the refrigerant discharge pipe 6 is provided, a second pipeline valve 10 is provided on the pipeline connecting the separation device 4 and the collecting device 7, a third pipeline valve 8 is provided on the pipeline connecting the collecting device 7 and the high-pressure refrigerant tank 9, and a fourth pipeline valve 11 is provided on the pipeline connecting the collecting device 7 and the air-conditioning pipeline.

[0033] By setting a first pipeline valve 5 to control the discharge state of the refrigerant separated from the separation device 4, when the first pipeline valve 5 is opened, the refrigerant gas separated in the separation device 4 is discharged through the refrigerant discharge pipe 6; by setting a second pipeline valve 10 to control the lubricating oil separated from the separation device 4 to enter the collecting device 7, when the separation device 4 separates the refrigerant and the lubricating oil, the second pipeline valve 10 is opened, and the lubricating oil enters the collecting device 7 through the pipeline connected between the separation device 4 and the collecting device 7; by setting a third pipeline valve 8 and a fourth pipeline valve 11, the lubricating oil in the collecting device 7 can be brought back when the refrigerant is filled. When the refrigerant is filled, the first pipeline valve 5 and the second pipeline valve 10 are closed, and the third pipeline valve 8 and the fourth pipeline valve 11 are opened, and the refrigerant in the high-pressure refrigerant tank 9 enters the collecting device 7 and takes away the lubricating oil and enters the air-conditioning pipeline, so that the refrigerant is filled with the lubricating oil and the recycling of the lubricating oil is realized, and the problem that the lubricating oil is brought out and wastes in the existing refrigerant filling process and the air-conditioning compressor fails due to lack of lubricating oil is solved.

[0034] In a preferred implementation of the refrigerant filling quantity calibration system, the first pipeline valve 5, the second pipeline valve 10, the third pipeline valve 8 and the fourth pipeline valve 11 are all solenoid valves that can be remotely controlled.

[0035] It should be noted that the present application does not limit the specific types of the first pipeline valve 5, the second pipeline valve 10, the third pipeline valve 8 and the fourth pipeline valve 11. The preferred implementation scheme is: they are all set as remotely controlled solenoid valves for easy operation, which can realize intelligent remote control of the system and facilitate operation and use.

[0036] The present application also provides a refrigerant filling amount calibration method, using the above refrigerant filling amount calibration system to determine the amount of refrigerant required for the air conditioner in a new model car, the steps comprising:

[0037] S1: Vacuum the air conditioning pipeline 1;

[0038] S2: separating and treating the mixture of the refrigerant and the lubricating oil extracted from the air conditioning pipeline 1, and storing the separated lubricating oil;

[0039] S3: Fill the air conditioning pipeline 1 with refrigerant and let the refrigerant pass through the container storing lubricating oil. Observe the pressure value change in the air conditioning pipeline 1. If the pressure value of the air conditioning pipeline 1 suddenly changes, stop filling the refrigerant. Record the amount of refrigerant filled, which is the calibrated refrigerant filling amount of this model of automobile air conditioner.

[0040] In a preferred implementation of a refrigerant filling amount calibration method, a pressure gauge 2 is provided in the air-conditioning pipeline 1 to constantly detect the pressure value in the air-conditioning pipeline 1 .

[0041] In a preferred implementation of a refrigerant filling amount calibration method, a vacuum pump 3 is provided to evacuate the air conditioning pipeline 1 to a vacuum state.

[0042] In a preferred implementation of the refrigerant filling amount calibration method, a separation device 4 is provided to separate the mixture of refrigerant and lubricating oil extracted from the air-conditioning pipeline 1 .

[0043] In a preferred implementation of the refrigerant filling amount calibration method, the lubricating oil separated by the separation device 4 is stored by providing a collecting device 7 .

[0044] In a preferred implementation of a refrigerant filling quantity calibration method, by connecting a high-pressure refrigerant tank 9 at one end of the collecting device 7 and connecting the other end to the air-conditioning pipeline 1, the lubricating oil is driven into the air-conditioning system during the refrigerant filling process, thereby realizing the recovery and utilization of the lubricating oil.

[0045] In a preferred implementation of the refrigerant filling amount calibration method, the refrigerant separated by the separation device 4 is recovered or directly discharged.

[0046] In summary, the present application provides a refrigerant filling amount calibration system and method, which solves the problem that in the prior art, during the automobile refrigerant filling amount calibration process, the refrigerant needs to be discharged from the vehicle's air conditioning pipeline 1 first, and the lubricating oil will also be discharged along with the refrigerant, resulting in a waste of lubricating oil. In the long run, it will also cause the air conditioning compressor to lack lubrication and malfunction. The discharged lubricating oil is separated and stored, and then the lubricating oil is brought back to the air conditioning pipeline 1 for recycling when the refrigerant is added, thereby reducing the waste of lubricating oil and ensuring the normal operation of the air conditioning compressor.

[0047] The technical solution protected by the present invention is not limited to the above-mentioned embodiments. It should be pointed out that the combination of the technical solution of any one embodiment with the technical solution of one or more other embodiments is within the protection scope of the present invention. Although the present invention has been described in detail above with general descriptions and specific embodiments, it is obvious to those skilled in the art that some modifications or improvements can be made to it based on the present invention. Therefore, these modifications or improvements made on the basis of not departing from the spirit of the present invention all belong to the scope of protection claimed by the present invention.

Claims

1. A refrigerant filling amount calibration system, characterized in that: It includes a vacuum pump, the suction port of the vacuum pump is connected to the air-conditioning pipeline, the discharge port of the vacuum pump is connected to the separation device, the separation device is also respectively connected to a collecting device and a refrigerant discharge pipe, the collecting device is respectively connected to the air-conditioning pipeline and a high-pressure refrigerant tank, and a pressure gauge is provided on the air-conditioning pipeline.

2. A refrigerant filling amount calibration system according to claim 1, characterized in that: The refrigerant discharge pipe is provided with a first pipeline valve for controlling its switch state, the pipeline connecting the separation device and the collecting device is provided with a second pipeline valve, the pipeline connecting the collecting device and the high-pressure refrigerant tank is provided with a third pipeline valve, and the pipeline connecting the collecting device and the air-conditioning pipeline is provided with a fourth pipeline valve.

3. A refrigerant filling amount calibration system according to claim 2, characterized in that: The first pipeline valve, the second pipeline valve, the third pipeline valve and the fourth pipeline valve are all solenoid valves that can be remotely controlled.

4. A refrigerant filling amount calibration method, using a refrigerant filling amount calibration system as claimed in any one of claims 1 to 3, for determining the amount of refrigerant required for air conditioning in a new model car, the steps comprising: Vacuum the air conditioning pipeline; Separate the mixture of refrigerant and lubricating oil extracted from the air conditioning pipeline and store the separated lubricating oil; Fill the air-conditioning pipeline with refrigerant and let the refrigerant pass through the container storing lubricating oil. Observe the pressure change in the air-conditioning pipeline. If there is a sudden change in the pressure of the air-conditioning pipeline, stop filling the refrigerant. Record the amount of refrigerant filled, which is the calibrated refrigerant filling amount of this model of automobile air-conditioning.

5. A refrigerant filling amount calibration method according to claim 4, characterized in that: The pressure value in the air-conditioning pipeline is constantly detected by arranging the pressure gauge in the air-conditioning pipeline.

6. A refrigerant filling amount calibration method according to claim 4, characterized in that: The vacuum pump is provided to evacuate the air conditioning pipeline to a vacuum state.

7. A refrigerant filling amount calibration method according to claim 4, characterized in that: The separation device is provided to separate the mixture of the refrigerant and the lubricating oil drawn from the air-conditioning pipeline.

8. A refrigerant filling amount calibration method according to claim 4, characterized in that: The lubricating oil separated by the separation device is stored by arranging the collection device.

9. A refrigerant filling amount calibration method according to claim 4, characterized in that: By connecting the high-pressure refrigerant tank at one end of the collecting device and connecting the air-conditioning pipeline at the other end, the lubricating oil can be driven into the air-conditioning system during the refrigerant filling process, thereby realizing the recycling of the lubricating oil.

10. A refrigerant filling amount calibration method according to claim 4, characterized in that: The refrigerant separated by the separation device is recovered or directly discharged.

Images