A production line and testing method for the performance testing of a water-cooled vehicle refrigerator

Abstract

This invention discloses a performance testing production line and method for a water-cooled vehicle-mounted refrigerator. The production line includes a roller conveyor and a data acquisition loop. The loop has multiple testing stations with circulating water flow. The roller conveyor is located below the testing stations. Every 1-10 testing stations form a testing group. Each testing station in the group is equipped with an industrial control computer and a refrigerator internal temperature acquisition device, which is connected to the computer. A chiller is installed at any testing station in the group, with a supply pipe and a return pipe. The supply and return pipes correspond one-to-one and are connected to the inlet and outlet pipes of the vehicle-mounted refrigerator, respectively, forming a circulating water circuit. A return water on / off valve is installed on the return pipe. A supply water on / off valve and a purge pipe are sequentially installed on the supply pipe in the direction of water flow. A one-way valve is installed on the purge pipe. This invention solves the problem of ensuring product quality upon delivery in existing technologies.

Description

Technical Field

[0001] This invention relates to the field of vehicle refrigerator technology, and in particular to a testing method for a water-cooled vehicle refrigerator performance testing production line. Background Technology

[0002] Currently, the testing methods for the cooling / heating performance of pure compressor-cooled vehicle refrigerators are as follows: power on, drive the compressor to work and cool, and after cooling is completed, drive the heating film to heat; the testing methods for the cooling / heating performance of pure TEC (thermal condenser)-cooled vehicle refrigerators are as follows: power on, control the semiconductor chip to work and perform a cooling test, and after cooling is completed, reverse the current of the semiconductor chip to perform a heating test. However, there is currently no testing method for the cooling / heating performance of water-cooled vehicle refrigerators (the specific structure of water-cooled vehicle refrigerators can be found in Chinese invention patent application CN121452759A, entitled "A Vehicle Refrigerator Based on a Shared Compressor"), making it difficult to guarantee the factory quality of the products. Summary of the Invention

[0003] To address the shortcomings of existing technologies, the purpose of this invention is to provide a performance testing production line for water-cooled vehicle refrigerators that can guarantee the quality of products leaving the factory.

[0004] To achieve the above objectives, the technical solution adopted by the water-cooled vehicle refrigerator performance testing production line of this invention is as follows:

[0005] A performance testing production line for a water-cooled vehicle-mounted refrigerator includes a roller conveyor and a data acquisition loop. The data acquisition loop has multiple testing stations with circulating water flow. The roller conveyor is located below the testing stations. Every 1-10 testing stations form a testing group. Each testing station in the testing group is equipped with an industrial control computer and a refrigerator internal temperature acquisition device. The refrigerator internal temperature acquisition device is connected to the industrial control computer. A chiller is installed at any testing station in the testing group. The chiller is equipped with a water supply pipe and a water return pipe. The number of water supply pipes and water return pipes is consistent with the number of testing stations in the testing group. The water supply pipes and water return pipes correspond one-to-one and are connected to the water inlet pipe and water outlet pipe of the vehicle-mounted refrigerator, respectively, to form a circulating water circuit. A water return on / off valve is installed on the water return pipe. A water supply on / off valve and a purge pipe are installed on the water supply pipe in sequence according to the water flow direction. A one-way valve is installed on the purge pipe.

[0006] Preferably, the water supply pipe is also equipped with a pressure sensor, a water supply temperature sensor, a flow meter and an electric regulating valve that are wirelessly connected to the industrial control computer, and the return water pipe is also equipped with a return water temperature sensor that is connected to the industrial control computer.

[0007] Preferably, both the water supply on / off valve and the water return on / off valve are solenoid valves and are connected to the industrial control computer.

[0008] Preferably, each testing station in the testing team is equipped with a barcode scanner, which is connected to a host computer, and the host computer is connected to an industrial control computer.

[0009] Preferably, the water supply pipe is connected to the refrigerator's water inlet pipe via a first quick-connect fitting, and the return water pipe is connected to the refrigerator's water outlet pipe via a second quick-connect fitting.

[0010] Preferably, the industrial control computer has a DC power supply inside, which is connected to a current commutator. The current commutator is installed inside the industrial control computer and is connected to the detection harness of the industrial control computer. The detection harness of the industrial control computer is used to connect to the assembly harness of the vehicle refrigerator. The industrial control computer controls the current commutator to change the current flow direction.

[0011] Preferably, an air tank is installed at any testing station in the testing group. The air tank is connected to a purge pipe in the same testing group. A purge solenoid valve is installed between the purge pipe and the air tank, and the purge solenoid valve is connected to the industrial control computer.

[0012] Preferably, the discharge end of the roller conveyor is equipped with an air tank, which is connected to the purge pipe in the same testing group via a third quick-connect connector.

[0013] To achieve the above objectives, the technical solution adopted by the testing method of the water-cooled vehicle refrigerator performance testing production line of this invention is as follows:

[0014] A testing method using a water-cooled vehicle refrigerator performance testing production line includes the following steps:

[0015] Step 1: Connect the water pipes: Connect the water supply pipes and return pipes corresponding to each other in the testing team to the water inlet pipes and water outlet pipes of the corresponding vehicle refrigerators on the roller line through the first quick-connect connector and the second quick-connect connector, respectively.

[0016] Step 2, Connect the power supply: Connect the vehicle refrigerator assembly wiring harness from Step 1 to the testing wiring harness led out from the industrial control computer at the corresponding testing station;

[0017] Step 3: Place the refrigerator internal temperature acquisition device: Place the refrigerator internal temperature acquisition device from each testing station into the corresponding vehicle refrigerator.

[0018] Step 4: Call the test parameters: Use the barcode scanners on each testing station to read the product barcode and send the read information to the host computer. The host computer sends instructions to the industrial control computer based on the product barcode, and the industrial control computer automatically calls the corresponding test parameters.

[0019] Step 5, Performance Testing:

[0020] (1) Cooling water parameter adjustment: The chiller is turned on, and the industrial control computer sends an opening command to the supply water on / off valve and the return water on / off valve. The cooling water circulates in the chiller, supply water pipe, vehicle refrigerator and return water pipe. The pressure sensor monitors the pressure of the circulating water circuit online and sends the collected real-time pressure data to the industrial control computer. The supply water temperature sensor monitors the temperature of the cooling water in the supply water pipe online and sends the collected real-time supply water temperature data to the industrial control computer. The flow meter monitors the flow rate of the circulating water circuit online and sends the collected real-time supply water flow rate data to the industrial control computer. The return water temperature sensor monitors the temperature of the cooling water in the return water pipe online and sends the collected real-time flow rate data to the industrial control computer. The system collects real-time return water temperature data and sends it to the industrial control computer. The operator then uses the industrial control computer to observe whether the real-time pressure data, real-time supply water temperature data, real-time supply water flow data, and real-time return water temperature data meet the preset thresholds. If the real-time pressure data and real-time supply water flow data do not meet the preset thresholds, the industrial control computer will automatically adjust them through the electric regulating valve until the real-time pressure data and real-time supply water flow data meet the preset thresholds. If the real-time supply water temperature data and real-time return water temperature data do not meet the preset thresholds, the operator will manually adjust the outlet water temperature of the chiller until the real-time supply water temperature data and real-time return water temperature data meet the preset thresholds.

[0021] (2) Cooling performance test: The industrial control computer controls the current commutator to introduce positive current into the vehicle refrigerator. The fan inside the vehicle refrigerator is powered on and works. The semiconductor refrigerator inside the vehicle refrigerator is powered on and performs cooling. The air temperature sensor and water temperature sensor inside the vehicle refrigerator are powered on and connected to the industrial control computer through the assembly wiring harness. The temperature acquisition device inside the refrigerator transmits the real-time cooling temperature data collected after a set time period to the industrial control computer. The air temperature sensor inside the vehicle refrigerator transmits the real-time air temperature data collected after a set time period to the industrial control computer. The water temperature sensor inside the vehicle refrigerator transmits the real-time refrigerator water temperature data collected after a set time period to the industrial control computer. The industrial control computer automatically judges whether the real-time cooling temperature data, real-time refrigerator cooling air temperature data and real-time refrigerator cooling water temperature data meet the preset threshold. At the same time, the industrial control computer uploads the test results to the host computer.

[0022] (3) Thermal insulation performance test: The power is cut off to the vehicle refrigerator by the industrial control computer. The temperature acquisition device inside the refrigerator will transmit the real-time thermal insulation temperature data collected after a set time period to the industrial control computer. The industrial control computer will automatically determine whether the real-time thermal insulation temperature data meets the preset threshold. At the same time, the industrial control computer will upload the test results to the host computer.

[0023] (4) Heating performance test: The industrial control computer controls the current commutator to introduce reverse current to the vehicle refrigerator, the fan inside the vehicle refrigerator is powered on and works, the semiconductor cooler inside the vehicle refrigerator is powered on and works to heat, the air temperature sensor and water temperature sensor inside the vehicle refrigerator are powered on and connected to the industrial control computer through the assembly wiring harness, the temperature acquisition device inside the refrigerator transmits the real-time heating temperature data collected after a set time period to the industrial control computer, the air temperature sensor inside the vehicle refrigerator transmits the real-time air temperature data collected after a set time period to the industrial control computer, the water temperature sensor inside the vehicle refrigerator transmits the real-time refrigerator water temperature data collected after a set time period to the industrial control computer, the industrial control computer automatically judges whether the real-time heating temperature data, the real-time refrigerator heating air temperature data and the real-time refrigerator water temperature data meet the preset threshold, and at the same time the industrial control computer uploads the test results to the host computer;

[0024] (5) Water and power outages: The chiller stops supplying water and the DC power supply stops supplying power;

[0025] Step 6, Air blowing and drainage: The industrial control computer first cuts off the water supply pipe through the water supply on / off valve, and then opens the purge pipe through the air blowing solenoid valve. Compressed air in the air tank enters the vehicle refrigerator and blows out the residual cooling water inside the vehicle refrigerator. The residual cooling water returns to the chiller through the return water pipe until the residual cooling water is drained. Then, the air blowing solenoid valve and the return water on / off valve are closed.

[0026] Step 7: Disconnect water pipes and test harness: Disconnect the water supply pipe and return pipe connected to the vehicle refrigerator using the first and second quick-connect connectors respectively, and disconnect the test harness connected to the vehicle refrigerator.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] 1. The water supply pipe is connected to the inlet pipe of the vehicle refrigerator, and the return pipe is connected to the outlet pipe of the vehicle refrigerator to form a circulating water circuit, thereby simulating the working state of the vehicle refrigerator. Then, the internal temperature acquisition device of the refrigerator is used to record the temperature change inside the vehicle refrigerator to detect whether the cooling, heat preservation and heating performance of the refrigerator meets the requirements. After the test is completed, the residual water in the vehicle refrigerator is blown out through the purge pipe, thereby ensuring the quality of the product leaving the factory.

[0029] 2. The industrial control computer ensures that the water supply meets the set requirements and guarantees the accuracy of the test results by using the online monitoring parameters of the pressure sensor, water supply temperature sensor, flow meter, and return water temperature sensor.

[0030] 3. The on-board refrigerators on the roller conveyor move synchronously with the inspection team on the collection loop, performing inspection work while continuously flowing to the next process, which greatly improves production efficiency.

[0031] 4. The industrial control computer automatically identifies the product model through the barcode scanner, then automatically executes the test process, automatically judges the results, and automatically blows and drains water, reducing manual intervention and errors. It has a high degree of automation and can upload the test data to the host computer in real time. It supports querying and statistics by barcode, model, time and other conditions, which facilitates quality management and traceability. Attached Figure Description

[0032] Figure 1 This is a front view of the performance testing production line for the water-cooled vehicle refrigerator in Embodiment 1.

[0033] Figure 2 yes Figure 1 A magnified view of a portion of the image.

[0034] Figure 3 This is a schematic diagram of the connection of the circulating water circuit and the purging pipe in Example 1.

[0035] Figure 4 This is a flowchart of the testing production line in Example 1.

[0036] Figure 5 This is a top view of the performance testing production line for the water-cooled vehicle refrigerator in Example 2.

[0037] Figure 6 This is a schematic diagram of the connection of the circulating water circuit and the purging pipe in Embodiment 2.

[0038] The components include: 1. Roller conveyor; 2. Acquisition loop; 21. Detection station; 3. Industrial control computer; 4. Chiller; 41. Water supply pipe; 411. First quick-connect fitting; 412. Pressure sensor; 413. Water supply temperature sensor; 414. Flow meter; 415. Electric regulating valve; 416. Water supply on / off valve; 42. Return water pipe; 421. Second quick-connect fitting; 422. Return water on / off valve; 423. Return water temperature sensor; 5. Purge pipe; 51. Check valve; 52. Air blowing solenoid valve; 53. Third quick-connect fitting; 6. Air tank. Detailed Implementation

[0039] The present invention will be further illustrated below with reference to the accompanying drawings and specific embodiments. It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of the invention. After reading this invention, any modifications of the invention in various equivalent forms by those skilled in the art will fall within the scope defined by the appended claims.

[0040] Example 1, as Figure 1-3As shown, a performance testing production line for a water-cooled vehicle refrigerator includes a roller conveyor 1 and a data acquisition loop 2. The data acquisition loop 2 has multiple testing stations 21 that circulate in a continuous flow. The roller conveyor 1 is located below the testing stations 21. Every six testing stations 21 constitute a testing group. Each testing station 21 in the testing group is equipped with an industrial control computer 3, two internal refrigerator temperature acquisition devices, and a barcode scanner. The industrial control computer 3 and the barcode scanner are both connected to a host computer via a wireless network. The internal refrigerator temperature acquisition devices are T-type thermocouple temperature sensors. A DC power supply is installed inside the industrial control computer 3, and the DC power supply is connected to a current commutator. The current commutator is installed inside the industrial control computer 3 and connected to the testing wiring harness of the industrial control computer 3. The testing wiring harness of the industrial control computer 3 is used to connect the vehicle refrigerator... The assembly wiring harness is controlled by the industrial control computer 3, which controls the current commutator to change the current flow direction. The refrigerator's internal temperature acquisition device is connected to the industrial control computer 3 via Bluetooth. The refrigerator's internal temperature acquisition device and the barcode scanner are suspended from the outer wall of the industrial control computer 3 by a bracket for easy access. A chiller 4 is installed at any of the testing stations 21 in the testing group. Specifically, the third testing station 21 from the left in the testing group can be selected. That is, one chiller 4 can supply cooling water to the entire vehicle-mounted refrigerator in the testing group, thereby reducing the amount of chiller 4 used and achieving the purpose of reducing costs. The chiller 4 is an industrial chiller. The chiller 4 is equipped with a water supply pipe 41 and a water return pipe 42. The number of water supply pipes 41 and water return pipes 42 is consistent with the number of testing stations 21 in the testing group. The 42 components are connected one-to-one with each other and are respectively connected to the inlet and outlet pipes of the vehicle refrigerator via the first quick-connect connector 411 and the second quick-connect connector 421 to form a circulating water circuit. The supply pipe 41 is sequentially equipped with a pressure sensor 412, a supply water temperature sensor 413, a flow meter 414, an electric regulating valve 415, a supply water on / off valve 416, and a purge pipe 5 according to the water flow direction. The return pipe 42 is sequentially equipped with a return water on / off valve 422 and a return water temperature sensor 423 according to the water flow direction. The pressure sensor 412, supply water temperature sensor 413, flow meter 414, electric regulating valve 415, and return water temperature sensor 423 are all connected to the industrial control computer 3 via Bluetooth. The industrial control computer 3 uses the pressure sensor 412, supply water temperature sensor 413, flow meter 414, and return water temperature sensor 423 to communicate with the industrial control computer 3 via Bluetooth. The online monitoring parameters of the water temperature sensor 423 are adjusted in real time by the electric regulating valve 415 to ensure that the water supply meets the set requirements and to ensure the accuracy of the cold and hot performance test results of the vehicle refrigerator. The water supply on / off valve 416 and the return water on / off valve 422 are both solenoid valves and are also connected to the industrial control computer 3 via Bluetooth communication. The industrial control computer 3 realizes the on / off control to improve the degree of automation. A one-way valve 51 is installed on the purge pipe 5. An air tank 6 is installed at any of the test stations 21 in the test group. Specifically, the third test station 21 from the left in the test group can be selected. The air tank 6 is connected to the purge pipe 5 in the same test group. A blowing solenoid valve 52 is installed between the one-way valve 51 and the air tank 6 on the purge pipe 5. The blowing solenoid valve 52 is connected to the industrial control computer 3 via Bluetooth communication.

[0041] like Figure 4 As shown, the testing method using a water-cooled vehicle refrigerator performance testing production line includes the following steps:

[0042] Step 1: Connect the water pipes: Connect the water supply pipes 41 and return pipes 42 in the testing group to the water inlet pipes and outlet pipes of the corresponding vehicle refrigerators on the roller line 1 through the first quick connector 411 and the second quick connector 421, respectively.

[0043] Step 2, Connect the power supply: Connect the vehicle refrigerator assembly wiring harness from Step 1 to the testing wiring harness led out from the industrial control computer 3 on the corresponding testing station 21;

[0044] Step 3: Place the refrigerator internal temperature acquisition device: Place the refrigerator internal temperature acquisition device on each testing station 21 into the corresponding vehicle refrigerator.

[0045] Step 4: Call test parameters: Use the barcode scanners on each testing station 21 to read the product barcode and send the read information to the host computer. The host computer sends instructions to the industrial control computer 3 according to the product barcode, and the industrial control computer 3 automatically calls the corresponding test parameters.

[0046] Step 5, Performance Testing:

[0047] (6) Cooling water parameter adjustment: Turn on the chiller 4, and the industrial control computer 3 sends an opening command to the water supply on / off valve 416 and the return water on / off valve 422. The cooling water circulates in the chiller 4, the water supply pipe 41, the vehicle refrigerator and the return water pipe 42. The pressure sensor 412 monitors the pressure of the circulating water circuit online and sends the collected real-time pressure data to the industrial control computer 3. The water supply temperature sensor 413 monitors the temperature of the cooling water in the water supply pipe 41 online and sends the collected real-time water supply temperature data to the industrial control computer 3. The flow meter 414 monitors the flow rate of the circulating water circuit online and sends the collected real-time water supply flow rate data to the industrial control computer 3. The return water temperature sensor 423 monitors the return water pipe online. The system measures the temperature of the internal cooling water and sends the collected real-time return water temperature data to the industrial control computer 3. The operator uses the industrial control computer 3 to observe whether the real-time pressure data, real-time supply water temperature data, real-time supply water flow data, and real-time return water temperature data meet the preset thresholds. If the real-time pressure data and real-time supply water flow data do not meet the preset thresholds, the industrial control computer 3 will automatically adjust them through the electric regulating valve 415 until the real-time pressure data and real-time supply water flow data meet the preset thresholds. If the real-time supply water temperature data and real-time return water temperature data do not meet the preset thresholds, the operator will manually adjust the outlet water temperature of the chiller 4 until the real-time supply water temperature data and real-time return water temperature data meet the preset thresholds.

[0048] (7) Cooling performance test: The industrial computer 3 controls the current commutator to introduce positive current into the vehicle refrigerator, the fan inside the vehicle refrigerator is powered on and works, the semiconductor cooler inside the vehicle refrigerator is powered on and performs cooling work, the air temperature sensor and water temperature sensor inside the vehicle refrigerator are powered on and connected to the industrial computer through the assembly wiring harness, the temperature acquisition device inside the refrigerator transmits the real-time cooling temperature data collected after a set time period to the industrial computer 3, the air temperature sensor inside the vehicle refrigerator transmits the real-time air temperature data collected after a set time period to the industrial computer 3, the water temperature sensor inside the vehicle refrigerator transmits the real-time refrigerator water temperature data collected after a set time period to the industrial computer 3, the industrial computer 3 automatically judges whether the real-time cooling temperature data, real-time refrigerator cooling air temperature data and real-time refrigerator cooling water temperature data meet the preset threshold, and at the same time the industrial computer 3 uploads the test results to the host computer;

[0049] (8) Thermal insulation performance test: The power is cut off to the vehicle refrigerator by the industrial control computer 3. The temperature acquisition device inside the refrigerator will transmit the real-time thermal insulation temperature data collected after a set time period to the industrial control computer 3. The industrial control computer 3 will automatically determine whether the real-time thermal insulation temperature data meets the preset threshold. At the same time, the industrial control computer 3 will upload the test results to the host computer.

[0050] (9) Heating performance test: The industrial computer 3 controls the current commutator to introduce reverse current to the vehicle refrigerator, the fan inside the vehicle refrigerator is powered on and works, the semiconductor cooler inside the vehicle refrigerator is powered on and works to heat, the air temperature sensor and water temperature sensor inside the vehicle refrigerator are powered on and connected to the industrial computer through the assembly wiring harness, the temperature acquisition device inside the refrigerator transmits the real-time heating temperature data collected after a set time period to the industrial computer 3, the air temperature sensor inside the vehicle refrigerator transmits the real-time air temperature data collected after a set time period to the industrial computer 3, the water temperature sensor inside the vehicle refrigerator transmits the real-time refrigerator water temperature data collected after a set time period to the industrial computer 3, the industrial computer 3 automatically judges whether the real-time heating temperature data, the real-time refrigerator heating air temperature data and the real-time refrigerator water temperature data meet the preset threshold, and at the same time the industrial computer 3 uploads the test results to the host computer;

[0051] (10) Water and power outages: Water chiller 4 stops supplying water and DC power supply stops supplying power;

[0052] Step 6, Air blowing and drainage: The industrial control computer 3 first cuts off the water supply pipe 41 through the water supply on / off valve 416, and then opens the purge pipe 5 through the air blowing solenoid valve 52. The compressed air in the air tank 6 enters the vehicle refrigerator and blows out the residual cooling water inside the vehicle refrigerator. The residual cooling water returns to the chiller 4 through the return water pipe 42 until the residual cooling water is drained. Then, the air blowing solenoid valve 52 and the return water on / off valve 422 are closed.

[0053] Step 7: Disconnect water pipes and test harness: Disconnect the water supply pipe 41 and return pipe 42 connected to the vehicle refrigerator using the first and second quick-connect connectors respectively, and disconnect the test harness connected to the vehicle refrigerator.

[0054] Example 2, as Figure 5-6 As shown, the difference from Embodiment 1 is that an air tank 6 is provided at the discharge end of the roller conveyor 1. The air tank 6 is connected to the purge pipe 5 in the same testing group through the third quick connector 53. That is, the air tank is set at a fixed point to reduce the amount of air tank used and achieve the purpose of saving costs. The air tank 6 at the discharge end of the roller conveyor 1 is in a normally open state. After being manually connected to the purge pipe 5 in the same testing group through the third quick connector 53, it is automatically purged.

[0055] The foregoing description illustrates and describes preferred embodiments of the present invention. As previously stated, it should be understood that the present invention is not limited to the forms disclosed herein and should not be construed as excluding other embodiments. It can be used in various other combinations, modifications, and environments, and can be altered within the scope of the inventive concept described herein through the foregoing teachings or techniques or knowledge in related fields. Any modifications and variations made by those skilled in the art that do not depart from the spirit and scope of the present invention should be within the protection scope of the appended claims.

Claims

1. A performance testing production line for a water-cooled vehicle-mounted refrigerator, characterized in that: The system includes a roller conveyor and a data acquisition loop. The data acquisition loop has multiple testing stations that operate in a circulating flow. The roller conveyor is located below the testing stations. Every 1-10 testing stations form a testing group. Each testing station in the testing group is equipped with an industrial control computer and a refrigerator internal temperature acquisition device. The refrigerator internal temperature acquisition device is connected to the industrial control computer. A chiller is installed at any testing station in the testing group. The chiller is equipped with a water supply pipe and a water return pipe. The number of water supply pipes and water return pipes is consistent with the number of testing stations in the testing group. The water supply pipes and water return pipes correspond one-to-one and are connected to the inlet and outlet pipes of the vehicle refrigerator, respectively, to form a circulating water circuit. A return water shut-off valve is installed on the water return pipe. A water supply shut-off valve and a purge pipe are installed on the water supply pipe in sequence according to the water flow direction. A one-way valve is installed on the purge pipe.

2. The performance testing production line for water-cooled vehicle-mounted refrigerators according to claim 1, characterized in that: The water supply pipe is also equipped with a pressure sensor, a water supply temperature sensor, a flow meter, and an electric regulating valve connected to the industrial control computer, and the return water pipe is also equipped with a return water temperature sensor connected to the industrial control computer.

3. The water-cooled vehicle refrigerator performance testing production line according to claim 2, characterized in that: Both the water supply on / off valve and the water return on / off valve are solenoid valves and are connected to the industrial control computer.

4. The performance testing production line for water-cooled vehicle-mounted refrigerators according to claim 3, characterized in that: Each testing station in the testing team is equipped with a barcode scanner, which is connected to a host computer, and the host computer is connected to an industrial control computer.

5. The performance testing production line for water-cooled vehicle-mounted refrigerators according to claim 4, characterized in that: The water supply pipe is connected to the refrigerator's water inlet pipe via a first quick-connect fitting, and the return water pipe is connected to the refrigerator's water outlet pipe via a second quick-connect fitting.

6. The performance testing production line for water-cooled vehicle-mounted refrigerators according to claim 5, characterized in that: The industrial computer has an internal DC power supply, which is connected to a current commutator. The current commutator is installed inside the industrial computer and is connected to the detection harness of the industrial computer. The detection harness of the industrial computer is used to connect to the assembly harness of the vehicle refrigerator. The industrial computer controls the current commutator to change the current flow direction.

7. The performance testing production line for water-cooled vehicle-mounted refrigerators according to claim 6, characterized in that: An air tank is installed at any testing station in the testing team. The air tank is connected to the purge pipe in the same testing team. A purge solenoid valve is installed between the purge pipe and the air tank, and the purge solenoid valve is wirelessly connected to the industrial control computer.

8. The performance testing production line for water-cooled vehicle-mounted refrigerators according to claim 6, characterized in that: The discharge end of the roller conveyor is equipped with an air tank, which is connected to the purge pipe in the same testing group via a third quick-connect connector.

9. A testing method using the performance testing production line for a water-cooled vehicle-mounted refrigerator as described in claim 7, comprising the following steps: Step 1: Connect the water pipes: Connect the water supply pipes and return pipes corresponding to each other in the testing team to the water inlet pipes and water outlet pipes of the corresponding vehicle refrigerators on the roller line through the first quick-connect connector and the second quick-connect connector, respectively. Step 2, Connect the power supply: Connect the vehicle refrigerator assembly wiring harness from Step 1 to the testing wiring harness led out from the industrial control computer at the corresponding testing station; Step 3: Place the refrigerator internal temperature acquisition device: Place the refrigerator internal temperature acquisition device from each testing station into the corresponding vehicle refrigerator. Step 4: Call the test parameters: Use the barcode scanners on each testing station to read the product barcode and send the read information to the host computer. The host computer sends instructions to the industrial control computer based on the product barcode, and the industrial control computer automatically calls the corresponding test parameters. Step 5, Performance Testing: (1) Cooling water parameter adjustment: Turn on the chiller, and the industrial control computer sends an opening command to the water supply on / off valve and the return water on / off valve. The cooling water circulates in the chiller, water supply pipe, vehicle refrigerator and return water pipe. The pressure sensor monitors the pressure of the circulating water circuit online and sends the collected real-time pressure data to the industrial control computer. The water supply temperature sensor monitors the temperature of the cooling water in the water supply pipe online and sends the collected real-time water supply temperature data to the industrial control computer. The flow meter monitors the flow of the circulating water circuit online and sends the collected real-time water supply flow data to the industrial control computer. The return water temperature sensor monitors the temperature of the cooling water in the return water pipe online and sends the collected real-time return water temperature data to the industrial control computer. The operator observes whether the real-time pressure data, real-time water supply temperature data, real-time water supply flow data and real-time return water temperature data meet the preset threshold through the industrial control computer. If the real-time pressure data and real-time water supply flow data do not meet the preset threshold, the industrial control computer will automatically adjust through the electric regulating valve until the real-time pressure data and real-time water supply flow data meet the preset threshold. If the real-time supply water temperature data and the real-time return water temperature data do not meet the preset threshold, the outlet water temperature of the chiller will be manually adjusted until the real-time supply water temperature data and the real-time return water temperature data meet the preset threshold. (2) Cooling performance test: The industrial control computer controls the current commutator to introduce positive current into the vehicle refrigerator. The fan inside the vehicle refrigerator is powered on and works. The semiconductor refrigerator inside the vehicle refrigerator is powered on and performs cooling. The air temperature sensor and water temperature sensor inside the vehicle refrigerator are powered on and connected to the industrial control computer through the assembly wiring harness. The temperature acquisition device inside the refrigerator transmits the real-time cooling temperature data collected after a set time period to the industrial control computer. The air temperature sensor inside the vehicle refrigerator transmits the real-time air temperature data collected after a set time period to the industrial control computer. The water temperature sensor inside the vehicle refrigerator transmits the real-time refrigerator water temperature data collected after a set time period to the industrial control computer. The industrial control computer automatically judges whether the real-time cooling temperature data, real-time refrigerator cooling air temperature data and real-time refrigerator cooling water temperature data meet the preset threshold. At the same time, the industrial control computer uploads the test results to the host computer. (3) Thermal insulation performance test: The power is cut off to the vehicle refrigerator by the industrial control computer. The temperature acquisition device inside the refrigerator will transmit the real-time thermal insulation temperature data collected after a set time period to the industrial control computer. The industrial control computer will automatically determine whether the real-time thermal insulation temperature data meets the preset threshold. At the same time, the industrial control computer will upload the test results to the host computer. (4) Heating performance test: The industrial control computer controls the current commutator to introduce reverse current to the vehicle refrigerator, the fan inside the vehicle refrigerator is powered on and works, the semiconductor cooler inside the vehicle refrigerator is powered on and works to heat, the air temperature sensor and water temperature sensor inside the vehicle refrigerator are powered on and connected to the industrial control computer through the assembly wiring harness, the temperature acquisition device inside the refrigerator transmits the real-time heating temperature data collected after a set time period to the industrial control computer, the air temperature sensor inside the vehicle refrigerator transmits the real-time air temperature data collected after a set time period to the industrial control computer, the water temperature sensor inside the vehicle refrigerator transmits the real-time refrigerator water temperature data collected after a set time period to the industrial control computer, the industrial control computer automatically judges whether the real-time heating temperature data, the real-time refrigerator heating air temperature data and the real-time refrigerator water temperature data meet the preset threshold, and at the same time the industrial control computer uploads the test results to the host computer; (5) Water and power outages: The chiller stops supplying water and the DC power supply stops supplying power; Step 6, Air blowing and drainage: The industrial control computer first cuts off the water supply pipe through the water supply on / off valve, and then opens the purge pipe through the air blowing solenoid valve. Compressed air in the air tank enters the vehicle refrigerator and blows out the residual cooling water inside the vehicle refrigerator. The residual cooling water returns to the chiller through the return water pipe until the residual cooling water is drained. Then, the air blowing solenoid valve and the return water on / off valve are closed. Step 7: Disconnect water pipes and test harness: Disconnect the water supply pipe and return pipe connected to the vehicle refrigerator using the first and second quick-connect connectors respectively, and disconnect the test harness connected to the vehicle refrigerator.

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