Automatic detection and maintenance device for automobile air conditioner

Abstract

The utility model discloses an automatic detecting and maintaining device for an automobile air conditioner. The automatic detecting and maintaining device comprises a controller, an interface assembly, a detecting unit, a refrigerant releasing unit, a refrigerant supplementing unit, a drying and evaporating unit, an oil-gas separating and recycling unit and an oil supplementing unit. The interface assembly comprises a high-pressure interface and a low-pressure interface, the high-pressure interface is connected and communicated with the drying evaporation unit, the drying evaporation unit is connected and communicated with the oil-gas separation and recovery unit, and the oil-gas separation and recovery unit is connected and communicated with the low-pressure interface; the oil supplementing unit is arranged between the low-pressure connector and the oil-gas separation and recovery unit and communicated with the low-pressure connector and the oil-gas separation and recovery unit. And the refrigerant supplementing unit is connected and communicated with the low-pressure interface. According to the utility model, dynamic replacement and maintenance actions of refrigerant and refrigerant oil of the automobile air conditioner are realized, various detection and maintenance functions are realized, the maintenance efficiency is obviously improved, and the labor cost and the resource waste are reduced.

Description

Technical Field

[0001] This utility model relates to the technical field of automotive air conditioning maintenance, specifically to an automatic detection and maintenance device for automotive air conditioning. Background Technology

[0002] With the continuous growth of car ownership, the frequency and duration of car air conditioning use are constantly increasing, and its performance and reliability have a more significant impact on the driving experience and vehicle safety. Currently, traditional car air conditioning maintenance methods rely heavily on manual operation, which has many drawbacks. For example, in refrigerant maintenance, manual testing of refrigerant pressure and content has low accuracy, and refrigerant leaks are prone to occur during refrigerant recovery, replenishment, and replacement, not only polluting the environment but also wasting resources. Regarding the maintenance of air conditioning refrigeration oil, manual judgment of refrigeration oil capacity and quality lacks accuracy, making timely and precise replenishment and replacement impossible, leading to accelerated wear of air conditioning system components, reducing the lifespan of the air conditioner and its cooling and heating efficiency. At the same time, existing car air conditioning maintenance equipment has limited functionality and cannot simultaneously meet the comprehensive testing and maintenance needs of both refrigerant and refrigeration oil, resulting in low maintenance efficiency and high maintenance costs. Furthermore, current car air conditioning maintenance methods employ static inspection and maintenance, meaning maintenance and replacement are performed when the car air conditioner is not running. This method is time-consuming, has a low refrigeration oil replacement rate, consumes a large amount of refrigerant, and increases maintenance costs.

[0003] Therefore, there is an urgent need for an automated and multifunctional automotive air conditioning testing and maintenance device to improve maintenance quality and efficiency and reduce maintenance costs. Utility Model Content

[0004] This utility model addresses the shortcomings of current technology by providing an automatic detection and maintenance device for automotive air conditioning systems. It aims to solve the technical problems of slow maintenance efficiency and inability to achieve automatic dynamic detection in existing automotive air conditioning systems.

[0005] The technical solution adopted by this utility model to achieve the above objectives is as follows:

[0006] An automatic detection and maintenance device for automotive air conditioning includes a controller, an interface assembly, a detection unit, a refrigerant release unit, a refrigerant replenishment unit, a drying and evaporation unit, an oil-gas separation and recovery unit, and an oil replenishment unit. The interface assembly includes a high-pressure interface and a low-pressure interface. The high-pressure interface is connected to the drying and evaporation unit, the drying and evaporation unit is connected to the oil-gas separation and recovery unit, and the oil-gas separation and recovery unit is connected to the low-pressure interface. The oil replenishment unit is disposed between the low-pressure interface and the oil-gas separation and recovery unit and is interconnected with them. The refrigerant replenishment unit is connected to the low-pressure interface.

[0007] The controller is used as a processing center for data acquisition, processing, and control.

[0008] The detection unit is used to detect the pressure at two points when the low-pressure interface and the high-pressure interface are connected and to feed the feedback to the controller for processing.

[0009] The refrigerant release unit is used for refrigerant regulation, release, and recovery.

[0010] The refrigerant replenishment unit is used for automatic replenishment when refrigerant is insufficient;

[0011] The drying and evaporation unit is used to dry and evaporate the refrigerant and refrigeration oil, which facilitates the subsequent oil-gas separation process.

[0012] The oil-gas separation and recovery unit is used to perform oil-gas separation, thereby realizing the recovery of waste oil.

[0013] The oil replenishment unit is used to detect the volume of the refrigeration oil and automatically replenish it.

[0014] As a further improvement, the drying and evaporation unit includes a dryer and an evaporator, with a first connecting pipe connecting the dryer and the evaporator; a second connecting pipe connecting the dryer and the high-pressure interface; and a first solenoid valve provided in the second connecting pipe between the dryer and the high-pressure interface.

[0015] As a further improvement, the first connecting pipe is also provided with a second connecting pipe, which is connected to the refrigerant release unit; the refrigerant release unit includes a second solenoid valve and a second capillary control assembly, one end of the second solenoid valve is connected to the second connecting pipe, and the second capillary control assembly is connected to the other end of the second solenoid valve; the second capillary control assembly is provided with a second interface;

[0016] The second capillary control assembly is used to recover the refrigerant to a recovery tank or release it to the outside.

[0017] As a further improvement, the oil-gas separation and recovery unit includes an oil-gas separator and a third solenoid valve. The oil-gas separator is connected to the evaporator by a third connecting pipe. The oil-gas separator is also provided with a fourth connecting pipe, which is connected to one end of the third solenoid valve.

[0018] As a further improvement, the other end of the third solenoid valve is provided with a waste oil recovery component; the oil-gas separator is also provided with a liquid level sensor, which is electrically connected to the controller.

[0019] As a further improvement, a fourth connecting pipe is provided between the oil-gas separator and the low-pressure interface, and the fourth connecting pipe is equipped with a fourth solenoid valve.

[0020] As a further improvement, the oil replenishment unit includes an oil replenishment component, a solenoid valve, a capillary assembly, a flow meter, and a check valve, and the oil replenishment component is equipped with a detachable oil bottle;

[0021] A fifth connecting pipe is provided between the solenoid valve and the fourth connecting pipe, between the capillary assembly and the oil replenishing assembly, between the oil replenishing assembly and the flow meter, between the flow meter and the check valve, and between the check valve and the low-pressure interface; the solenoid valve can be installed on any of the fifth connecting pipes.

[0022] As a further improvement, the refrigerant replenishment unit includes a refrigerant replenishment interface, a fifth yarn tube assembly, a fifth check valve, and a fifth solenoid valve; a sixth connecting pipe is provided between the refrigerant replenishment interface and the fifth yarn tube assembly, between the fifth yarn tube assembly and the fifth solenoid valve, between the fifth solenoid valve and the fifth check valve, and between the fifth check valve and the low-pressure interface.

[0023] As a further improvement, the detection unit includes two pressure sensors, which are respectively installed on the high-pressure interface and the low-pressure interface.

[0024] As a further improvement, the controller is also equipped with a temperature detection module, which includes one or more temperature sensors. The temperature sensors are used to receive and collect the ambient temperature, the air inlet and outlet temperatures of the automotive air conditioner, the condenser inlet temperature, and the condenser outlet temperature. The controller is electrically connected to the pressure sensor, dryer, evaporator, first solenoid valve, second solenoid valve, gas separator, third solenoid valve, fourth solenoid valve, oil replenishment assembly, solenoid valve, flow meter, check valve, fifth check valve, fifth solenoid valve, and temperature sensors.

[0025] Compared with the prior art, the above-mentioned one or more technical solutions in the automatic detection and maintenance device for automotive air conditioning provided in this embodiment of the utility model have at least one of the following technical effects:

[0026] This invention achieves automated and comprehensive detection and maintenance of automotive air conditioning systems by incorporating multiple functional units, including a controller, interface components, a detection unit, a refrigerant release unit, a refrigerant replenishment unit, a drying and evaporation unit, an oil-gas separation and recovery unit, and an oil replenishment unit. This reduces maintenance costs and improves maintenance efficiency. The detection unit can accurately monitor the pressure of the high-pressure and low-pressure interfaces of the air conditioning system in real time and feed this data back to the controller, providing accurate data support for subsequent maintenance operations. The refrigerant release and replenishment units can automatically recover, release, and replenish refrigerant according to inspection needs. The drying and evaporation unit, working in conjunction with the oil-gas separation and recovery unit, dries, evaporates, and separates the refrigerant and refrigerant oil flowing into the automatic detection and maintenance device, achieving waste oil recovery. The oil replenishment unit can automatically replenish refrigerant oil based on the detection results, ensuring good lubrication of all components of the external air conditioning system and extending the equipment's service life. This invention achieves dynamic replacement and maintenance of automotive air conditioning refrigerant and refrigerant oil, realizing multiple detection and maintenance functions, significantly improving maintenance efficiency, and reducing labor costs and resource waste. Attached Figure Description

[0027] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0028] Figure 1 This is a schematic diagram of the automatic detection and maintenance device for automotive air conditioning in this embodiment. Detailed Implementation

[0029] The following description is only a preferred embodiment of the present invention and does not limit the scope of protection of the present invention.

[0030] For examples, see the appendix. Figure 1An automatic detection and maintenance device 1 for automotive air conditioning includes a controller 2, an interface assembly 3, a detection unit 4, a refrigerant release unit 5, a refrigerant replenishment unit 6, a drying and evaporation unit 7, an oil-gas separation and recovery unit 8, and an oil replenishment unit 9. The interface assembly 3 includes a high-pressure interface 30 and a low-pressure interface 31. The high-pressure interface 30 is connected to the high-pressure port of the air conditioner, and the low-pressure interface 31 is connected to the low-pressure port of the air conditioner. The high-pressure interface 30 is connected to the drying and evaporation unit 7, the drying and evaporation unit 7 is connected to the oil-gas separation and recovery unit 8, and the oil-gas separation and recovery unit 8 is connected to the low-pressure interface 31. The oil replenishment unit 9 is disposed between the low-pressure interface 31 and the oil-gas separation and recovery unit 8 and is interconnected with them. The refrigerant replenishment unit 6 is connected to the low-pressure interface 31. The controller 2 serves as a processing center for data acquisition, processing, and control. The system includes a control circuit board with an MCU chip; the detection unit 4 detects the pressure at the two points when the low-pressure interface 31 and the high-pressure interface 30 are connected and feeds this information back to the controller 2 for processing; the refrigerant release unit 5 regulates, releases, and recovers the refrigerant; the refrigerant replenishment unit 6 automatically replenishes the refrigerant when it is low; the drying and evaporation unit 7 dries and evaporates the refrigerant and refrigeration oil, facilitating subsequent oil-gas separation; the oil-gas separation and recovery unit 8 performs oil-gas separation to recover waste oil; and the oil replenishment unit 9 detects the refrigeration oil level and automatically replenishes it. The automatic detection and maintenance device 1 performs dynamic maintenance of the automotive air conditioning system, enabling refrigerant recovery, replenishment, and replacement, as well as refrigeration oil recovery, replenishment, and replacement, achieving multi-functional maintenance, improving maintenance efficiency, and reducing maintenance costs.

[0031] The drying and evaporation unit 7 includes a dryer 70 and an evaporator 71. A first connecting pipe connects the dryer 70 and the evaporator 71. A second connecting pipe connects the dryer 70 and the high-pressure interface 30. A first solenoid valve 72 is provided on the second connecting pipe between the dryer 70 and the high-pressure interface 30. The drying and evaporation unit 7 is used for drying and evaporation.

[0032] The first connecting pipe is also provided with a second connecting pipe, which is connected to the refrigerant release unit 5; the refrigerant release unit 5 includes a second solenoid valve 50 and a second capillary control component 51, one end of the second solenoid valve 50 is connected to the second connecting pipe, and the second capillary control component 51 is connected to the other end of the second solenoid valve 50; the second capillary control component is provided with a second interface; the second capillary control component 51 is used to recover refrigerant to a recovery tank or release it to the outside.

[0033] The oil-gas separation and recovery unit 8 includes an oil-gas separator 80 and a third solenoid valve 81. The oil-gas separator 80 is connected to the evaporator 71 via a third connecting pipe. The oil-gas separator 80 also has a fourth connecting pipe, which is connected to one end of the third solenoid valve 81. The other end of the third solenoid valve 81 is equipped with a waste oil recovery assembly 82, which includes a waste oil bottle and a capillary assembly. The oil-gas separator 80 also has a liquid level sensor 83, which is electrically connected to the controller 2. The liquid level sensor 83 is preferably either an infrared liquid level sensor or an ultrasonic liquid level sensor. A fourth connecting pipe is provided between the oil-gas separator 80 and the low-pressure interface 31, and this fourth connecting pipe is equipped with a fourth solenoid valve 84. The oil-gas separation and recovery unit 8 is used to separate waste oil and gas, thereby achieving waste oil recovery and new oil replacement.

[0034] The oil replenishment unit 9 includes an oil replenishment component 90, a solenoid valve 91, a capillary assembly 92, a flow meter 93, and a one-way valve 94. The oil replenishment component 90 is equipped with a detachable oil bottle. Fifth connecting pipes are provided between the solenoid valve 91 and the fourth connecting pipe, between the capillary assembly 92 and the oil replenishment component 90, between the oil replenishment component 90 and the flow meter 93, between the flow meter 93 and the one-way valve 94, and between the one-way valve 94 and the low-pressure interface 31. The solenoid valve 91 can be installed on any of the fifth connecting pipes. The oil replenishment unit 9 is used for automatic replenishment when the detected and maintained air conditioning refrigerant oil is insufficient. The solenoid valve 91 is used to control the oil replenishment function of the oil replenishment component 90. The one-way valve 94 is used to ensure unidirectional movement of the oil replenishment action. The flow meter 93 is used to monitor the amount of oil replenished.

[0035] The refrigerant replenishment unit 6 includes a refrigerant replenishment interface 60, a fifth hose assembly 61, a fifth one-way valve 62, and a fifth solenoid valve 63. A sixth connecting pipe connects the refrigerant replenishment interface 60 to the fifth hose assembly 61, the fifth hose assembly 61 to the fifth solenoid valve 63, the fifth solenoid valve 63 to the fifth one-way valve 62, and the fifth one-way valve 62 to the low-pressure interface 31. The refrigerant replenishment unit 6 controls the opening or closing of the fifth solenoid valve 63 based on feedback control signals. Combined with the one-way flow control of the fifth one-way valve 62, it achieves automatic refrigerant replenishment when refrigerant is insufficient. The refrigerant replenishment interface 60 is used to connect to an external refrigerant tank.

[0036] The detection unit 4 includes two pressure sensors, which are respectively installed on the high-pressure port 30 and the low-pressure port 31. The pressure sensors are used to detect the pressure on the high-pressure port 30 and the low-pressure port 31 during operation, thereby performing a monitoring function.

[0037] The controller 2 is also equipped with a temperature detection module 10, which includes one or more temperature sensors. The temperature sensors are used to receive and collect the ambient temperature, the air inlet and outlet temperatures of the car air conditioner, the condenser inlet temperature, and the condenser outlet temperature. The temperature detection module 10 can be increased or decreased as needed to provide temperature detection function for the car air conditioner. By judging the ambient temperature, the air inlet and outlet temperatures of the car air conditioner, the condenser inlet temperature, and the condenser outlet temperature through the temperature detection module 10, the temperature detection function is realized, thereby improving the efficiency and accuracy of maintenance. The controller 2 is electrically connected to the pressure sensor, dryer 70, evaporator 71, first solenoid valve 72, second solenoid valve 50, gas separator, third solenoid valve 81, fourth solenoid valve 84, oil replenishment assembly 90, solenoid valve 91, flow meter 93, one-way valve 94, fifth one-way valve 62, and fifth solenoid valve 63.

[0038] This invention achieves automated and comprehensive detection and maintenance of automotive air conditioning systems by incorporating multiple functional units, including a controller, interface components, a detection unit, a refrigerant release unit, a refrigerant replenishment unit, a drying and evaporation unit, an oil-gas separation and recovery unit, and an oil replenishment unit. This reduces maintenance costs and improves maintenance efficiency. The detection unit can accurately monitor the pressure of the high-pressure and low-pressure interfaces of the air conditioning system in real time and feed this data back to the controller, providing accurate data support for subsequent maintenance operations. The refrigerant release and replenishment units can automatically recover, release, and replenish refrigerant according to inspection needs. The drying and evaporation unit, working in conjunction with the oil-gas separation and recovery unit, dries, evaporates, and separates the refrigerant and refrigerant oil flowing into the automatic detection and maintenance device, achieving waste oil recovery. The oil replenishment unit can automatically replenish refrigerant oil based on the detection results, ensuring good lubrication of all components of the external air conditioning system and extending the equipment's service life. This invention achieves dynamic replacement and maintenance of automotive air conditioning refrigerant and refrigerant oil, realizing multiple detection and maintenance functions, significantly improving maintenance efficiency, and reducing labor costs and resource waste.

[0039] This utility model is not limited to the above-described embodiments. Other automatic detection and maintenance devices for automotive air conditioning obtained by using the same or similar structures or devices as the above-described embodiments of this utility model are all within the protection scope of this utility model.

Claims

1. An automatic detection and maintenance device for automotive air conditioning, characterized in that: The automatic detection and maintenance device includes a controller, an interface assembly, a detection unit, a refrigerant release unit, a refrigerant replenishment unit, a drying and evaporation unit, an oil-gas separation and recovery unit, and an oil replenishment unit. The interface assembly includes a high-pressure interface and a low-pressure interface. The high-pressure interface is connected to the drying and evaporation unit, the drying and evaporation unit is connected to the oil-gas separation and recovery unit, and the oil-gas separation and recovery unit is connected to the low-pressure interface. The oil replenishment unit is located between the low-pressure interface and the oil-gas separation and recovery unit and is interconnected with them. The refrigerant replenishment unit is connected to the low-pressure interface. The controller is used as a processing center for data acquisition, processing, and control. The detection unit is used to detect the pressure at two points when the low-pressure interface and the high-pressure interface are connected and to feed the feedback to the controller for processing. The refrigerant release unit is used for refrigerant regulation, release, and recovery. The refrigerant replenishment unit is used for automatic replenishment when refrigerant is insufficient; The drying and evaporation unit is used to dry and evaporate the refrigerant and refrigeration oil, which facilitates the subsequent oil-gas separation process. The oil-gas separation and recovery unit is used to perform oil-gas separation, thereby realizing the recovery of waste oil. The oil replenishment unit is used to detect the volume of the refrigeration oil and automatically replenish it.

2. The automatic detection and maintenance device for automotive air conditioning according to claim 1, characterized in that: The drying and evaporation unit includes a dryer and an evaporator. A first connecting pipe connects the dryer and the evaporator. A second connecting pipe connects the dryer and the high-pressure interface. A first solenoid valve is provided on the second connecting pipe between the dryer and the high-pressure interface.

3. The automatic detection and maintenance device for automotive air conditioning according to claim 2, characterized in that: The first connecting pipe is further provided with a second connecting pipe, which is connected to the refrigerant release unit; the refrigerant release unit includes a second solenoid valve and a second capillary control assembly, one end of the second solenoid valve is connected to the second connecting pipe, and the second capillary control assembly is connected to the other end of the second solenoid valve; the second capillary control assembly is provided with a second interface; The second capillary control assembly is used to recover the refrigerant to a recovery tank or release it to the outside.

4. The automatic detection and maintenance device for automotive air conditioning according to claim 3, characterized in that: The oil-gas separation and recovery unit includes an oil-gas separator and a third solenoid valve. The oil-gas separator is connected to the evaporator by a third connecting pipe. The oil-gas separator is also provided with a fourth connecting pipe, which is connected to one end of the third solenoid valve.

5. The automatic detection and maintenance device for automotive air conditioning according to claim 4, characterized in that: The other end of the third solenoid valve is equipped with a waste oil recovery component; the oil-gas separator is also equipped with a liquid level sensor, which is electrically connected to the controller.

6. The automatic detection and maintenance device for automotive air conditioning according to claim 5, characterized in that: A fourth connecting pipe is provided between the oil-gas separator and the low-pressure interface, and the fourth connecting pipe is equipped with a fourth solenoid valve.

7. The automatic detection and maintenance device for automotive air conditioning according to claim 6, characterized in that: The oil replenishment unit includes an oil replenishment component, a solenoid valve, a capillary assembly, a flow meter, and a check valve. The oil replenishment component is equipped with a detachable oil bottle. A fifth connecting pipe is provided between the solenoid valve and the fourth connecting pipe, between the capillary assembly and the oil replenishing assembly, between the oil replenishing assembly and the flow meter, between the flow meter and the check valve, and between the check valve and the low-pressure interface; the solenoid valve can be installed on any of the fifth connecting pipes.

8. The automatic detection and maintenance device for automotive air conditioning according to claim 7, characterized in that: The refrigerant replenishment unit includes a refrigerant replenishment interface, a fifth yarn tube assembly, a fifth check valve, and a fifth solenoid valve; a sixth connecting pipe is provided between the refrigerant replenishment interface and the fifth yarn tube assembly, between the fifth yarn tube assembly and the fifth solenoid valve, between the fifth solenoid valve and the fifth check valve, and between the fifth check valve and the low-pressure interface.

9. The automatic detection and maintenance device for automotive air conditioning according to claim 8, characterized in that: The detection unit includes two pressure sensors, which are respectively installed on the high-pressure interface and the low-pressure interface.

10. The automatic detection and maintenance device for automotive air conditioning according to claim 9, characterized in that: The controller is also equipped with a temperature detection module, which includes one or more temperature sensors. The temperature sensors are used to receive and collect the ambient temperature, the air inlet and outlet temperatures of the car air conditioner, the condenser inlet temperature, and the condenser outlet temperature. The controller is electrically connected to the pressure sensor, dryer, evaporator, first solenoid valve, second solenoid valve, gas separator, third solenoid valve, fourth solenoid valve, oil replenishment assembly, solenoid valve, flow meter, check valve, fifth check valve, fifth solenoid valve, and temperature sensor.

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