Automobile air conditioning system intelligent detector

Abstract

This utility model discloses an intelligent diagnostic instrument for automotive air conditioning systems, relating to the field of automotive system diagnostic equipment. It includes a diagnostic instrument housing, a refrigerant oil quality detection component, a temperature detection component, and an OBD module. One end of the diagnostic instrument housing is connected to a detection box, which houses an integrated circuit board. A touchscreen is mounted on the diagnostic instrument housing. The refrigerant oil quality detection component, temperature detection component, and OBD module are mounted on the detection box. The refrigerant oil quality detection component includes an oil quality sensor probe, which is vertically fixed to the top of the detection box. The temperature detection component includes a temperature sensor probe and a first wire. The OBD module includes an OBD plug, a second wire, a main control unit, a communication interface, and a power management and storage unit. This utility model can perform pre-inspections of automotive air conditioning systems, facilitating regular vehicle maintenance for car owners.

Description

Technical Field

[0001] This utility model relates to the field of automotive system diagnostic equipment, and in particular to an intelligent testing instrument for automotive air conditioning systems. Background Technology

[0002] The automotive air conditioning system mainly consists of a compressor, expansion joint, evaporator, dryer, condenser, blower, fan, and control unit. Specifically: the compressor, driven by a belt from the engine, changes the refrigerant pressure within the system and facilitates refrigerant circulation; the expansion joint reduces pressure, regulates and controls refrigerant flow, and prevents liquid refrigerant from entering the compressor; the evaporator acts as another heat exchanger in the air conditioning system; the dryer absorbs moisture, stores refrigerant, filters impurities, and prevents liquid refrigerant from entering the compressor; the condenser cools and liquefies high-temperature, high-pressure gas; the blower blows cool air into the passenger compartment; the fan helps the condenser dissipate heat and reduces refrigerant pressure; and the control unit ensures the normal and safe operation of the air conditioning system, guarantees it operates at the set temperature, and protects the system components. Therefore, the automotive air conditioning system achieves a circulating cooling effect through the coordinated function of its components. A malfunction in any component can significantly reduce the cooling efficiency of the entire system or even cause it to fail, increasing the difficulty of repair and testing.

[0003] Currently, there are various methods for testing and repairing automotive air conditioning systems. However, most of these methods are for systems that have already malfunctioned. Because testing becomes more difficult after a malfunction, the accuracy of the tests is not high. This often leads the repair industry to opt for replacement instead of repair, increasing repair costs for car owners. Therefore, there is an urgent need to develop an intelligent testing instrument for automotive air conditioning systems. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide an intelligent testing instrument for automotive air conditioning systems, which can perform pre-inspection of automotive air conditioning systems, making it convenient for car owners to maintain their cars regularly.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0006] A smart testing instrument for automotive air conditioning systems includes a testing instrument housing, a refrigerant oil quality testing component, a temperature testing component, and an OBD module. One end of the testing instrument housing is connected to a testing box, which houses an integrated circuit board. A touchscreen is mounted on the testing instrument housing and electrically connected to the integrated circuit board. The refrigerant oil quality testing component, temperature testing component, and OBD module are mounted on the testing box. The refrigerant oil quality testing component includes an oil quality sensor probe, which is vertically fixed to the top of the testing box and electrically connected to the integrated circuit board. The temperature testing component includes a temperature sensor probe and a first wire, with the temperature sensor probe electrically connected to the integrated circuit board via the first wire. The OBD module includes an OBD plug, a second wire, a main control unit, a communication interface, a power management and storage unit. The OBD plug is electrically connected to the integrated circuit board via the second wire. The main control unit, communication interface, power circuit, and storage unit are integrated on the integrated circuit board.

[0007] In some embodiments, the oil quality sensor probe is a parallel plate capacitor.

[0008] In some embodiments, the temperature sensor probe is a thermocouple.

[0009] Compared with the prior art, this utility model achieves at least the following beneficial effects:

[0010] 1. The integrated circuit board designed in this utility model is embedded with corresponding software, which can read and memorize the relevant data of the current measurement of the car air conditioning system. The software will automatically convert and analyze the test data with the standard data to generate a test report. Users can download the vehicle inspection system APP corresponding to the intelligent tester of the car air conditioning system. The vehicle inspection system APP is interconnected with the WiFi module of the integrated circuit board, which can realize functions such as online testing process photography, data synchronization, result analysis, generation of test reports, recommendation of maintenance items, and push of online reports.

[0011] 2. The refrigeration oil quality detection component, temperature detection component, OBD module, and integrated circuit board designed in this utility model are connected. The detection data can be directly retrieved, memorized, and reported by embedded proprietary software, eliminating the need for manual memorization or copying. The refrigeration oil quality detection component enables rapid detection of refrigeration oil life and contamination level. The temperature detection component enables rapid detection of air conditioning cooling effect, cooling rate, and heating effect. The OBD module, connected to the integrated circuit board, can directly read vehicle data streams, retrieve corresponding useful data sets, and perform conversion and analysis with the standard data of the integrated circuit board's proprietary software to generate a test report. This enables compressor maintenance query and adaptation, and engine load detection when the air conditioning is on. This utility model can perform pre-inspection of relevant data of the automotive air conditioning system, facilitating car owners to perform regular vehicle maintenance and reducing maintenance costs. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the structure of an embodiment of this application;

[0013] Figure 2 This is an exploded view of an embodiment of this application;

[0014] Figure 3 This is a schematic diagram of the upper shell structure according to an embodiment of this application;

[0015] Figure 4 This is a schematic diagram of the lower shell structure according to an embodiment of this application;

[0016] Figure 5 This is a schematic diagram of the connection structure between the detection box and the adapter in an embodiment of this application;

[0017] The diagram is labeled as follows: 1. Detector housing; 11. Upper shell; 111. Upper slot; 12. Lower shell; 121. Lower slot; 2. Refrigeration oil quality detection component; 21. Oil quality sensor probe; 3. Temperature detection component; 31. Temperature sensor probe; 32. First wire; 4. OBD module; 41. OBD plug; 42. Second wire; 5. Detection box; 51. First circular groove; 511. Screw hole; 52. Second circular groove; 521. Through hole; 6. Integrated circuit board; 7. Touch screen; 8. Thermal printer; 9. Speaker; 10. Battery; 20. Adapter; 201. Connecting plate; 202. First connecting cylinder; 2021. Countersunk hole; 203. Second connecting cylinder; 30. Fixing screw; 40. Refrigeration oil detection cotton kit; Detailed Implementation

[0018] The present invention will now be described in detail with reference to exemplary embodiments shown in the accompanying drawings. However, it should be understood that the present application may be implemented in many different forms and should not be construed as limited to the embodiments set forth herein. These embodiments are provided herein to make the disclosure of this application more complete and to fully convey the concept of the present application to those skilled in the art.

[0019] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this application, "several" or "more than" means two or more, unless otherwise explicitly specified. In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances. In this application, unless otherwise expressly specified and limited, "above" or "below" a second feature can include direct contact between the first and second features, or it can include contact between the first and second features through another feature between them. Moreover, "above," "over," and "on top" of a second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" of a second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0020] like Figures 1-5 As shown in the figure, an intelligent testing instrument for an automotive air conditioning system according to an embodiment of this application includes a testing instrument housing 1, a refrigerant oil quality testing component 2, a temperature testing component 3, and an OBD module 4.

[0021] The detector housing 1 is connected to a detection box 5 at one end. An integrated circuit board 6 is installed inside the detection box 5, and proprietary software is burned into the main control chip on the integrated circuit board 6. The software is used to control hardware functions, process data, and implement communication protocols. A touch screen 7 is installed on the detector housing 1 and is electrically connected to the integrated circuit board 6. The touch screen 7 has a user interface. A refrigerant oil quality detection component 2, a temperature detection component 3, and an OBD module 4 are installed on the detection box 5. The refrigerant oil quality detection component 2 includes an oil quality sensor probe 21, which is vertically fixed. The temperature detection component 3 is fixed on the top of the detection box 5 and electrically connected to the integrated circuit board 6. The temperature detection component 3 includes a temperature sensor probe 31 and a first wire 32. The temperature sensor probe 31 is electrically connected to the integrated circuit board 6 through the first wire 32. The OBD module 4 includes an OBD plug 41, a second wire 42, a main control unit, a communication interface, a power management and storage unit. The OBD plug 41 is electrically connected to the integrated circuit board 6 through the second wire 42. The main control unit, communication interface, power circuit and storage unit are integrated on the integrated circuit board 6 and electrically connected through wiring.

[0022] When using the intelligent automotive air conditioning system testing instrument of this application:

[0023] Place the temperature sensor probe 31 at the air conditioning vent and connect the OBD plug 41 to the vehicle's OBD interface. Then start the car and turn on the air conditioning. The temperature sensor probe 31 can measure data such as the lowest temperature at the vent and the highest temperature at the vent. The main control chip on the integrated circuit board 6 calculates data such as the air conditioning cooling rate and the air conditioning heating rate. The software directly pulls and memorizes the data. The software automatically converts and analyzes the test data with the standard data to generate a test report. There is no need for manual memorization or copying. This enables the rapid detection and generation of reports on data such as air conditioning cooling effect, cooling rate, and heating effect.

[0024] OBD module 4 communicates with the vehicle's electronic control unit via the OBD interface. OBD module 4 sends specific diagnostic commands to the electronic control unit, requesting the return of fault codes and sensor data. Each fault code corresponds to a different fault type. The main control unit of OBD module 4 pulls the corresponding useful data sets such as engine speed when the air conditioner is on, engine load when the air conditioner is on, and engine fuel consumption, and performs conversion and analysis with the standard data of the independent software of the integrated circuit board to generate a test report and perform diagnosis.

[0025] Press the refrigeration oil testing cotton kit 40 three times directly onto the low-pressure pipe interface of the air conditioning pipe. The refrigeration oil testing cotton kit 40 is an auxiliary tool for quickly assessing the contamination level and aging status of refrigeration oil and other fluids. Its structure is existing technology and will not be elaborated here. By observing the color of the refrigeration oil absorbed by the testing cotton, one can determine whether the refrigeration oil has deteriorated. By observing the amount of refrigeration oil absorbed by the testing cotton, one can determine whether the refrigeration oil level is sufficient. The corresponding test data can be directly selected on the UI interface of the touch screen 7. The UI operation data will be directly processed by the main control chip of the integrated circuit board 6 and interconnected with the touch screen 7, printer, and vehicle inspection system APP. Then, it will be converted and analyzed with the standard data of the independent software of the integrated circuit board 6 to generate a test report. Insert the tested refrigeration oil testing cotton kit 40 directly into the oil quality sensor probe 21, ensuring that the testing cotton is in close contact with the oil quality sensor probe 21. Measure the contamination level and lifespan change value of the refrigeration oil and transmit the corresponding test data to the integrated circuit board 6. The main control chip of the integrated circuit board 6 processes the test data and interconnects with the touch screen 7, printer, and vehicle inspection system APP to generate a test report.

[0026] The high and low pressure values ​​of the air conditioning pipes are obtained by using the refrigerant meter set. The high and low pressure values ​​can be directly selected or entered on the UI interface of the touch screen 7. The UI operation data will be directly processed by the integrated circuit board 6 and interconnected with the touch screen 7, printer, and vehicle inspection system APP. Then, it will be converted and analyzed with the standard data of the independent software of the integrated circuit board 6 to generate a test report, realizing the detection of the pressure of the air conditioning high pressure pipe and the air conditioning low pressure pipe.

[0027] Operators download the corresponding vehicle inspection system APP. The vehicle inspection system APP is interconnected with the WiFi module of integrated circuit board 6 to realize functions such as online inspection process photography, data synchronization, result analysis, generation of inspection reports, recommendation of maintenance items, and push of online reports to vehicle owners.

[0028] In this embodiment, the oil quality sensor probe 21 can be selected as a parallel plate capacitor. Since the dielectric constant of the refrigeration oil will change with oxidation, water mixing, metal particle contamination, etc., the oil quality sensor probe 21 measures the change in capacitance of the refrigeration oil, converts it into dielectric constant, and then calculates the degree of contamination and life change value of the refrigeration oil, and transmits the corresponding detection data to the integrated circuit board 6.

[0029] In this embodiment, the temperature sensor probe 31 can be a thermocouple.

[0030] In this embodiment, a thermal printer 8 is installed inside the housing 1 of the detector. The thermal printer 8 is electrically connected to the integrated circuit board 6 and can print the test report generated by the software of the integrated circuit board 6 into a paper report, which contains test parameters, analysis reports, recommended maintenance items and other data, and gives the paper report to the car owner.

[0031] In this embodiment, the detector housing 1 is also equipped with a speaker 9 and a battery 10, which are electrically connected to the integrated circuit board 6.

[0032] In this embodiment, the detector housing 1 includes an upper shell 11 and a lower shell 12 joined together. The upper shell 11 has an upper slot 111 at one bottom end, and the lower shell 12 has a lower slot 121 corresponding to the upper slot 111 at its top. An adapter 20 is provided between the detector housing 1 and the detection box 5. The adapter 20 includes a connecting plate 201, a first connecting cylinder 202, and a second connecting cylinder 203. The upper part of the connecting plate 201 is inserted into the upper slot 111, and the lower part is inserted into the lower slot 121. The first connecting cylinder 202 and the second connecting cylinder 203 are arranged parallel to each other and vertically fixed to one side of the connecting plate 201. The first connecting cylinder 202... A countersunk hole 2021 is provided along the upper axial direction, through which a fixing screw 30 passes. The side wall of the detection box 5 has a first circular groove 51 and a second circular groove 52 for the insertion of the first connecting cylinder 202 and the second connecting cylinder 203, respectively. The first circular groove 51 has a screw hole 511 corresponding to the countersunk hole 2021, through which the fixing screw 30 passes and is threadedly connected. The second circular groove 52 has a through hole 521 corresponding to the first connecting cylinder 202, through which wires can pass, facilitating the electrical connection between relevant components on the detector housing 1, such as the touch screen 7, and the integrated circuit board 6. The detection box 5 and the detector housing 1 are detachably connected via an adapter 20, allowing for the replacement of relevant detection components according to the required detection data.

[0033] It should be understood that all the above embodiments are exemplary and not restrictive. Any modifications, equivalent changes and alterations made by those skilled in the art to the specific embodiments described above under the concept of this utility model shall still fall within the scope of the technical solution of this utility model.

Claims

1. An intelligent testing instrument for automotive air conditioning systems, characterized in that: Includes the detector housing, refrigeration oil quality detection component, temperature detection component, and OBD module; One end of the detector housing is connected to a detection box, an integrated circuit board is installed inside the detection box, and a touch screen is installed on the detector housing. The touch screen is electrically connected to the integrated circuit board. The refrigeration oil quality detection component, temperature detection component, and OBD module are mounted on the detection box. The refrigeration oil quality detection component includes an oil quality sensor probe, which is vertically fixed to the top of the detection box and electrically connected to the integrated circuit board. The temperature detection component includes a temperature sensor probe and a first wire, which is electrically connected to the integrated circuit board through the first wire. The OBD module includes an OBD plug, a second wire, a main control unit, a communication interface, a power management and storage unit, and the OBD plug is electrically connected to the integrated circuit board through the second wire. The main control unit, communication interface, power circuit, and storage unit are integrated on the integrated circuit board.

2. The intelligent testing instrument for automotive air conditioning systems according to claim 1, characterized in that: The oil quality sensor probe is a parallel plate capacitor.

3. The intelligent testing instrument for automotive air conditioning systems according to claim 1, characterized in that: The temperature sensor probe is a thermocouple.

4. The intelligent testing instrument for automotive air conditioning systems according to claim 1, characterized in that: A thermal printer is installed inside the housing of the detector, and the thermal printer is electrically connected to the integrated circuit board.

5. The intelligent testing instrument for automotive air conditioning systems according to claim 4, characterized in that: The detector housing also houses a speaker and a battery, which are electrically connected to the integrated circuit board.

6. The intelligent testing instrument for automotive air conditioning systems according to claim 1, characterized in that: The detector housing includes an upper shell and a lower shell that are joined together. The bottom of the upper shell has an upper slot, and the top of the lower shell has a lower slot corresponding to the upper slot. An adapter is provided between the detector housing and the detection box. The adapter includes a connecting plate, a first connecting cylinder, and a second connecting cylinder. The upper part of the connecting plate is inserted into the upper slot, and the lower part is inserted into the lower slot. The first connecting cylinder and the second connecting cylinder are arranged in parallel and fixed vertically to one side of the connecting plate. The first connecting cylinder has a countersunk hole along the axial direction, and a fixing screw passes through the countersunk hole. The side wall of the detection box has a first circular groove and a second circular groove for the first connecting cylinder and the second connecting cylinder to be inserted, respectively. The first circular groove has a screw hole corresponding to the countersunk hole, and the fixing screw passes through the countersunk hole and is threadedly connected to the screw hole. The second circular groove has a through hole corresponding to the first connecting cylinder.

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