An oil cooler test system

Abstract

The present invention relates to an oil cooler test system, which includes an outer oil tank, a to-be-tested oil cooler and a test console. The outer oil tank and the to-be-tested oil cooler are connected through an inlet pipe and a return pipe. At least a first solenoid valve and a first ball valve are connected to the inlet pipe, and at least a second ball valve and a third ball valve are connected to the return pipe. The inlet pipe is connected to a second solenoid valve, an inlet pressure sensor and an inlet temperature sensor through a branch pipe. The return pipe is connected to an outlet pressure sensor, an outlet temperature sensor and a flow meter. A heater, a liquid level switch and an oil tank temperature detector are connected inside the outer oil tank. The outer oil tank is also connected to an oil replenishing barrel through an oil replenishing pipe with an oil replenishing pump. The test console is electrically connected to the electrical components connected to the outer oil tank and the to-be-tested oil cooler respectively. The oil cooler test system can simulate the working conditions of the oil cooler, automatically collect the parameters during the operation of the oil cooler, and perform data integration and calculation, so as to judge the working conditions of the oil cooler immediately, accurately and completely. Moreover, it has a wide range of applications, is easy to operate and has a high degree of intelligence.

Description

Technical Field

[0001] The invention relates to electrical equipment, in particular to an oil cooler testing system. Background Art

[0002] The oil cooler is a refrigeration system. According to the principle of the refrigeration system, the low-temperature and low-pressure liquid refrigerant exchanges heat with the oil outside the evaporator refrigeration pipeline. The low-temperature and low-pressure liquid refrigerant absorbs the heat of the oil and evaporates into a low-temperature and low-pressure gaseous refrigerant. The temperature and pressure of the refrigerant remain unchanged during the evaporation process. The low-temperature and low-pressure gaseous refrigerant enters the compressor, is compressed by the compressor, and is compressed into a high-temperature and high-pressure gaseous refrigerant and then discharged. Then it enters the condenser and exchanges heat with the surrounding air in the condenser. The high-temperature and high-pressure gaseous refrigerant is extracted by the fan and flows through The condenser exchanges heat with the relatively low-temperature air, so that the heat of the high-temperature and high-pressure gaseous refrigerant in the condenser is absorbed by the air, the air temperature rises, and the refrigerant releases heat to become a medium-temperature and high-pressure liquid. The high pressure in the condenser process remains unchanged, and then enters the expansion valve for throttling. Throttling is a process of rapid pressure reduction and temperature reduction. The refrigerant becomes a low-temperature and low-pressure liquid. After this process, the refrigerant enters the evaporator for heat exchange and evaporation, thereby realizing the entire process of the refrigeration system; After the oil cooler is produced, it is necessary to test whether the oil cooler can perform refrigeration operations normally and stably, and a A set of test equipment is used to monitor the various data of the oil cooler operation in real time to detect whether the oil cooler can operate normally. The company has previously applied for a device named "An oil cooler oil circuit detection mechanism" (application date: July 8, 2021, application number: CN202121553057.6), which is a mechanism for detecting the working status of the oil cooler. The oil cooler is connected to the oil tank to simulate the normal working status of the oil cooler, and the various parameters of the oil cooler under the operating status are detected through the test bench to analyze the operation of the oil cooler. However, the above oil The oil circuit detection mechanism of the oil cooler still has the following problems: 1. After the detection is completed, the oil remains in the oil cooler and the connected oil pipes and cannot be extracted in time, resulting in waste and pollution of oil leakage after the oil cooler is disassembled; 2. There is no liquid level mechanism in the oil tank, and manual observation of the liquid level in the oil tank and manual operation to replenish the oil may affect the accuracy and reliability of the test; 3. The types of oil coolers that can be tested by this detection mechanism are relatively small and lack versatility; 4. Data analysis is cumbersome, and the error rate of manual operation, calculation, and judgment is high, and the efficiency is low. Summary of the invention

[0003] In view of the above-mentioned shortcomings of the prior art, an object of the present invention is to provide an oil cooler testing system to solve one or more problems in the prior art.

[0004] To achieve the above object, the technical solution of the present invention is as follows:

[0005] An oil cooler test system, comprising an outer oil tank, a to-be-tested oil cooler and a test control console. The outer oil tank and the to-be-tested oil cooler are connected through an inlet pipe and a return pipe. At least a first solenoid valve and a first ball valve are connected to the inlet pipe. At least a second ball valve and a third ball valve are connected to the return pipe. The inlet pipe is connected to a second solenoid valve through a branch pipe at a position behind the first solenoid valve. An inlet pressure sensor and an inlet temperature sensor are connected to the end of the inlet pipe close to the to-be-tested oil cooler. An outlet pressure sensor and an outlet temperature sensor are connected to the end of the return pipe close to the to-be-tested oil cooler. A flowmeter is also connected to the return pipe. A heater, a liquid level switch and a tank temperature detector are connected inside the outer oil tank. The outer oil tank is also connected to an oil replenishing barrel through an oil replenishing pipe with an oil replenishing pump. The test control console is electrically connected to control the first solenoid valve, the second solenoid valve, the inlet pressure sensor, the inlet temperature sensor, the outlet pressure sensor, the outlet temperature sensor, the flowmeter, the heater, the liquid level switch, the tank temperature detector, the oil replenishing pump and the sensors connected to the to-be-tested oil cooler.

[0006] As a further improvement of the above technical solution:

[0007] The inlet pipe is connected to a fourth ball valve and an external oil pump through an oil pump branch pipe at a position between the second solenoid valve and the first ball valve. The external oil pump is also electrically connected to the test control console. A gate valve is connected to the inlet pipe at a position between the two connection ends of the oil pump branch pipe.

[0008] The return pipe is connected to a circulating heating pipe at a position between the flowmeter and the third ball valve. The other end of the circulating heating pipe is connected to a position behind the gate valve of the inlet pipe. A fifth ball valve and a circulating heater are connected to the circulating heating pipe. The circulating heater is also electrically connected to the test control console.

[0009] A heating temperature measuring sensor is connected at the position of the circulating heater. The heating temperature measuring sensor is electrically connected to the test control console.

[0010] The oil replenishing pipe is connected to an oil replenishing branch pipe at the position of the outlet end of the oil replenishing pump. The other end of the oil replenishing branch pipe can be connected to the inner oil tank of the to-be-tested oil cooler. A ninth ball valve is connected to the oil replenishing branch pipe.

[0011] A first filter is connected to the inlet pipe at the connection end of the inlet pipe and the outer oil tank. A second filter is connected to the return pipe in front of the flowmeter.

[0012] A sixth ball valve and a seventh ball valve are respectively connected to the return pipe in front of the second filter and behind the flowmeter.

[0013] The return pipe is connected to a return flow branch pipe. The two ends of the return flow branch pipe are respectively connected to the position of the return pipe in front of the sixth ball valve and the position of the return pipe behind the seventh ball valve. An eighth ball valve is connected to the return flow branch pipe.

[0014] The heater inside the outer fuel tank is located at the connection position between the return oil pipe and the outer fuel tank. The fuel tank temperature detector inside the outer fuel tank is located at the connection position between the inlet oil pipe and the outer fuel tank. A partition is also connected inside the outer fuel tank. The outer fuel tank is also connected to a circulation pipe with a circulation pump, and the circulation pump is electrically connected to the test control console.

[0015] A high-pressure sensor, a low-pressure sensor, a current transformer, an inlet air temperature sensor, and an outlet air temperature sensor are provided inside the oil cooler to be tested, and the high-pressure sensor, the low-pressure sensor, the current transformer, the inlet air temperature sensor, and the outlet air temperature sensor are all electrically connected to the test control console.

[0016] Compared with the prior art, the beneficial technical effects of the present invention are as follows:

[0017] 1) By designing the first solenoid valve and the second solenoid valve, the oil pumping operation can be realized after the oil cooler test system completes the test, and the remaining oil liquid can be recovered into the outer fuel tank, which can prevent oil leakage and pollution and reduce oil waste.

[0018] 2) The oil cooler test system of the present invention can be used for testing the A-type oil cooler without an internal oil pump, the PA-type oil cooler with an internal oil pump, and the PAX-type oil cooler with an internal oil pump and an internal fuel tank, and can also meet the detection of oil cooler models with different refrigeration capacities and different refrigerants, and has good general performance.

[0019] 3) The test control console automatically collects the oil temperature and the oil liquid level inside the outer fuel tank. The test bench can also detect the inlet / outlet oil temperature, the inlet / outlet oil pressure, the oil flow of the oil cooler, the high-pressure and low-pressure pressures during the operation of the oil cooler refrigeration system, the working current of the oil cooler, and the inlet / outlet air temperature of the oil cooler, and can automatically calculate the refrigeration efficiency through the test control console, judge whether the refrigeration capacity of the oil cooler meets the standard, and display the judgment result, avoiding and reducing the mistakes and inefficiencies of manual operation, calculation, and judgment.

[0020] 4) The test control console can also monitor and automatically collect various data, compare them with relevant preset parameters, and once it is found that a certain test parameter exceeds the preset value, an alarm message will be sent to prompt the tester to take corresponding treatment measures.

[0021] 5) The outer fuel tank is connected to a liquid level switch and a compensating oil pipe with a compensating oil pump, which can automatically supplement the oil liquid in the fuel tank.

[0022] 6) The outer fuel tank is connected to a circulation pipe with a circulation pump to ensure the oil liquid circulation, make the oil liquid temperature inside the outer fuel tank uniform, and a partition is connected inside the outer fuel tank, which can not only increase the oil liquid disturbance to prevent the unheated oil liquid from directly flowing out from the inlet oil pipe position, but also prevent the heater from affecting the fuel tank temperature detector to measure the oil liquid temperature inside the fuel tank.

[0023] 7) The inlet pipe and the return pipe are respectively connected with a first filter and a second filter to filter the oil fluid and remove impurities in the oil fluid, preventing the impurities from affecting the normal operation of the oil cooler test system;

[0024] 8) The two ends of the flowmeter and the second filter are connected with a sixth ball valve and a seventh ball valve, which facilitates the disassembly and maintenance of the flowmeter and the second filter. A return branch pipe is also connected to one side of the flowmeter and the second filter. When maintaining or ending the oil pumping, the use times of the flowmeter and the second filter can be reduced through the return branch pipe, and the maintenance cycle can be extended. Description of the Drawings

[0025] Figure 1 Shows the connection schematic diagram of the oil cooler test system of Embodiment 1 and the A-type oil cooler.

[0026] Figure 2 Shows the connection schematic diagram of the oil cooler test system of Embodiment 2 and the PA-type oil cooler.

[0027] Figure 3 Shows the connection schematic diagram of the oil cooler test system of Embodiment 3 and the PAX-type oil cooler.

[0028] Reference Signs in the Drawings:

[0029] 1. Outer oil tank; 11. Heater; 12. Liquid level switch; 13. Tank temperature measurer; 14. Partition board; 2. Oil cooler to be tested; 3. Test console; 4. Inlet pipe; 41. First solenoid valve; 42. First ball valve; 43. Second solenoid valve; 44. Inlet pressure sensor; 45. Inlet temperature sensor; 46. Fourth ball valve; 47. Outer oil pump; 48. Gate valve; 49. First filter; 5. Return pipe; 51. Second ball valve; 52. Third ball valve; 53. Outlet pressure sensor; 54. Outlet temperature sensor; 55. Flowmeter; 56. Second filter; 57. Sixth ball valve; 58. Seventh ball valve; 59. Eighth ball valve; 6. Make-up oil pipe; 61. Make-up oil pump; 62. Make-up oil barrel; 63. Ninth ball valve; 7. Circulation heating pipe; 71. Fifth ball valve; 72. Circulation heater; 73. Heating temperature sensor; 8. Circulation pipe; 81. Circulation pump. Detailed Embodiments

[0030] In order to make the objectives, technical solutions and advantages of the present invention more clear and understandable, the device proposed by the present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments. According to the following description, the advantages and features of the present invention will become clearer. It should be noted that the accompanying drawings are in a very simplified form and are all drawn in non-precise proportions, only for the purpose of facilitating and clearly assisting in explaining the embodiments of the present invention. In order to make the objectives, features and advantages of the present invention more obvious and understandable, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. shown in the drawings of this specification are only used to cooperate with the content disclosed in the specification for those skilled in this technology to understand and read, and are not used to limit the limiting conditions for the implementation of the present invention. Therefore, they do not have substantial technical significance. Any modification of the structure, change of the proportional relationship or adjustment of the size, without affecting the effects that the present invention can produce and the objectives that can be achieved, should fall within the scope covered by the technical content disclosed by the present invention.

[0031] As Figures 1 to 3 shown, the oil cooler test system of this embodiment includes an outer oil tank 1, a tested oil cooler 2 and a test console 3. The outer oil tank 1 and the tested oil cooler 2 are connected through an inlet pipe 4 and a return pipe 5. At least a first solenoid valve 41 and a first ball valve 42 are connected on the inlet pipe 4. At least a second ball valve 51 and a third ball valve 52 are connected on the return pipe 5. The inlet pipe 4 is connected to a second solenoid valve 43 through a branch pipe at a position behind the first solenoid valve 41. An inlet pressure sensor 44 and an inlet temperature sensor 45 are connected to the end of the inlet pipe 4 close to the tested oil cooler 2. An outlet pressure sensor 53 and an outlet temperature sensor 54 are connected to the end of the return pipe 5 close to the tested oil cooler 2. The return pipe 5 is also connected to a flow meter 55. A heater 11, a liquid level switch 12 and a tank temperature detector 13 are connected inside the outer oil tank 1. The outer oil tank 1 is also connected to an oil replenishing barrel 62 through an oil replenishing pipe 6 with an oil replenishing pump 61. The oil replenishing pipe 6 is connected to an oil replenishing branch pipe at the outlet end position of the oil replenishing pump 61. The other end of the oil replenishing branch pipe can be connected to the inner oil tank of the tested oil cooler 2. A ninth ball valve 63 is connected on the oil replenishing branch pipe. The tested oil cooler 2 with an inner oil tank can be replenished with oil through the oil replenishing branch pipe. The test console 3 is electrically connected to control the first solenoid valve 41, the second solenoid valve 43, the inlet pressure sensor 44, the inlet temperature sensor 45, the outlet pressure sensor 53, the outlet temperature sensor 54, the flow meter 55, the heater 11, the liquid level switch 12, the tank temperature detector 13, the oil replenishing pump 61 and the sensors connected to the tested oil cooler 2. The inlet temperature sensor 45, the outlet temperature sensor 54 and the flow meter 55 can respectively detect the inlet oil temperature, the outlet oil temperature and the instantaneous oil flow of the oil cooler, and thus the refrigerating capacity of the oil cooler can be calculated. At the same time, the inlet pressure sensor 44 and the outlet pressure sensor 53 can detect the inlet and outlet oil pressures of the oil cooler to judge the operation condition of the oil cooler.

[0032] The inlet oil pipe 4 is connected to the fourth ball valve 46 and the external oil pump 47 through an oil pump branch pipe at a position between the second solenoid valve 43 and the first ball valve 42. The external oil pump 47 is also electrically connected to the test control console 3. The inlet oil pipe 4 is connected to the gate valve 48 at a position between the two connection ends of the oil pump branch pipe. By adding an oil pump branch pipe with an external oil pump 47, the oil cooler test system can be used to test the A-type oil cooler without an internal oil pump.

[0033] The return oil pipe 5 is connected to the circulation heating pipe 7 at a position between the flowmeter 55 and the third ball valve 52. The other end of the circulation heating pipe 7 is connected to a position behind the gate valve 48 of the inlet oil pipe 4. The fifth ball valve 71 and the circulation heater 72 are connected to the circulation heating pipe 7. The circulation heater 72 is also electrically connected to the test control console 3. By connecting the circulation heating pipe 7, the oil cooler test system can be used to test the PAX-type oil cooler with an internal oil pump and an internal oil tank. The heating temperature sensor 73 is connected at the position of the circulation heater 72. The heating temperature sensor 73 is electrically connected to the test control console 3 and can collect the temperature of the oil passing through the circulation heater 72.

[0034] The inlet oil pipe 4 is connected to the first filter 49 at the connection end of the inlet oil pipe 4 and the external oil tank 1, which can filter the impurities in the oil sent from the external oil tank 1. The return oil pipe 5 is connected to the second filter 56 in front of the flowmeter 55, which can filter the impurities in the oil sent from the oil cooler 2 to be tested, preventing the impurities in the oil from damaging each component in the oil cooler test system.

[0035] The return oil pipe 5 is connected to the sixth ball valve 57 and the seventh ball valve 58 respectively in front of the second filter 56 and behind the flowmeter 55, so that the second filter 56 and the flowmeter 55 can be disassembled and maintained through the sixth ball valve 57 and the seventh ball valve 58. And the return oil pipe 5 is connected to a return branch pipe. The two ends of the return branch pipe are respectively connected to the position of the return oil pipe 5 in front of the sixth ball valve 57 and the position of the return oil pipe 5 behind the seventh ball valve 58. The eighth ball valve 59 is connected to the return branch pipe. When the sixth ball valve 57 and the seventh ball valve 58 are closed and the eighth ball valve 59 is opened, the oil flows through the return branch pipe and then returns to the return oil pipe 5. The oil does not pass through the flowmeter 55 and the second filter 56, and the flowmeter 55 and the second filter 56 do not work, which can extend the service life of the flowmeter 55 and the second filter 56, and thus reduce the maintenance and replacement frequency.

[0036] The heater 11 inside the outer fuel tank 1 is located at the connection position between the return oil pipe 5 and the outer fuel tank 1. The fuel tank temperature detector 13 inside the outer fuel tank 1 is located at the connection position between the inlet oil pipe 4 and the outer fuel tank 1. A partition plate 14 is also connected inside the outer fuel tank 1. The outer fuel tank 1 is also connected to a circulation pipe 8 with a circulation pump 81. The circulation pump 81 is electrically connected to the test control console 3. The partition plate 14 prevents the temperature during the heating of the heater 11 from directly affecting the fuel tank temperature detector 13, causing temperature fluctuations of the fuel tank temperature detector 13. Moreover, the circulation pipe 8 with the circulation pump 81 can make the oil fluid inside the outer fuel tank 1 flow, making the oil fluid temperature inside the outer fuel tank 1 uniform.

[0037] A high-pressure sensor, a low-pressure sensor, a current transformer, an inlet air temperature sensor, and an outlet air temperature sensor are arranged inside the oil cooler 2 to be measured. The high-pressure sensor, the low-pressure sensor, the current transformer, the inlet air temperature sensor, and the outlet air temperature sensor are all electrically connected to the test control console 3. The high-pressure sensor and the low-pressure sensor are used to detect the high-pressure and low-pressure of the refrigeration system of the oil cooler during operation. The current transformers are respectively installed at the positions of the oil pump, the compressor, and the fan of the oil cooler to respectively detect the currents when the oil pump, the compressor, and the fan are working. The inlet air temperature sensor and the outlet air temperature sensor are respectively used to detect the inlet air temperature and the outlet air temperature of the oil cooler fan, which can be used as the parameter basis for judging whether the refrigeration system is operating normally.

[0038] Embodiment 1

[0039] As Figure 1 shown, the oil cooler test system of this embodiment is used to test the Type A oil cooler, and the test steps are as follows:

[0040] 1) Installation: Connect the oil cooler 2 to be measured and the outer fuel tank 1 well, and electrically connect each electrical component to the test control console 3;

[0041] 2) Oil filling: Start the oil filling pump 61 to fill the oil fluid in the oil filling barrel 62 into the outer fuel tank 1. When the oil level in the outer fuel tank 1 reaches the upper oil level position of the liquid level switch 12, the oil filling pump 61 can be controlled to close to complete the oil filling operation;

[0042] 3) Oil fluid heating: Start the heater 11 and the circulation pump 81 to heat the oil fluid in the outer fuel tank 1, and at the same time make the oil fluid in the outer fuel tank 1 circulate and flow to uniformly heat the oil fluid. When the fuel tank temperature detector 13 detects that the oil temperature in the outer fuel tank 1 reaches the set value, the heater 11 can be turned off, and the circulation pump 81 keeps circulating to complete the oil fluid heating operation, and at the same time ensure that the oil temperature in the fuel tank is uniform;

[0043] 4) Testing: Open the first ball valve 42, the second ball valve 51, the third ball valve 52, the fourth ball valve 46, the gate valve 48, the sixth ball valve 57, and the seventh ball valve 58, and close the fifth ball valve 71 and the eighth ball valve 59 to make the inlet pipe 4 and the return pipe 5 unobstructed. Then, control the first solenoid valve 41 to conduct through the test console 3, and at the same time control the external oil pump 47 to start. The oil in the external oil tank 1 can then enter the oil cooler 2 to be tested through the inlet pipe 4 for cooling. After cooling, it flows back to the external oil tank 1 through the return pipe 5 to simulate the working condition of the oil cooler 2 to be tested. The test console 3 automatically detects various parameters during the working process of the oil cooler 2 to be tested, can integrate the parameters, calculate parameters such as the refrigerating capacity of the oil cooler 2 to be tested, record the tested parameters, and print them for future reference to facilitate subsequent traceability and statistical summary;

[0044] During the testing process, the test console 3 monitors the oil temperature in the external oil tank 1 in real time through the oil tank temperature sensor 13. When the oil temperature drops to the set value, it is necessary to start the oil heating operation again;

[0045] 5) Oil recovery pumping: After the test is completed, the test console 3 first controls the first solenoid valve 41 to close, then conducts the second solenoid valve 43, and at the same time controls the external oil pump 47 to start, then the pumping can be started to pump the residual oil in the inlet pipe 4, the oil cooler 2 to be tested, and the return pipe 5 back into the external oil tank 1. After the pumping is completed, the oil cooler 2 to be tested can be disassembled.

[0046] During the operation of step 5), since there is no need to test the flow parameters anymore, the sixth ball valve 57 and the seventh ball valve 58 can be closed, and the eighth ball valve 59 can be opened so that the oil does not pass through the flowmeter 55 and the second filter 56, extending the service life of the flowmeter 55 and the second filter 56.

[0047] Embodiment 2

[0048] As Figure 2 shown, the oil cooler test system of this embodiment is used to test the PA type oil cooler. Since the PA type oil cooler is equipped with an internal oil pump and there is no need to start the external oil pump 47, the test steps are as follows:

[0049] 1) Installation: Connect the oil cooler 2 to be tested and the external oil tank 1, and electrically connect each electrical component to the test console 3;

[0050] 2) Oil filling: Start the oil filling pump 61 to fill the oil in the oil filling barrel 62 into the external oil tank 1. When the oil level in the external oil tank 1 reaches the upper oil level position of the liquid level switch 12, the oil filling pump 61 can be controlled to close to complete the oil filling operation;

[0051] 3) Oil heating: Start the heater 11 and the circulation pump 81 to heat the oil in the outer oil tank 1, and at the same time make the oil in the outer oil tank 1 circulate and heat the oil evenly. When the oil tank temperature detector 13 detects that the oil temperature in the outer oil tank 1 reaches the set value, the heater 11 can be turned off, and the circulation pump 81 keeps circulating to complete the oil heating operation and ensure that the oil temperature in the oil tank is even;

[0052] 4) Test: open the first ball valve 42, the second ball valve 51, the third ball valve 52, the gate valve 48, the sixth ball valve 57 and the seventh ball valve 58, close the fourth ball valve 46, the fifth ball valve 71 and the eighth ball valve 59 to make the oil inlet pipe 4 and the oil return pipe 5 unblocked, then control the first solenoid valve 41 to be turned on through the test console 3, and control the oil pump of the tested oil cooler 2 to start at the same time, so that the oil in the external oil tank 1 can enter the tested oil cooler 2 through the oil inlet pipe 4 for cooling, and after cooling, return to the external oil tank 1 through the oil return pipe 5, simulating the working condition of the tested oil cooler 2, and automatically detect various parameters in the working process of the tested oil cooler 2 through the test console 3, and can integrate the parameters, calculate the parameters such as the cooling capacity of the tested oil cooler 2, and record the test parameters, and print them for reference, so as to facilitate subsequent tracing and statistical summary;

[0053] During the test, the test console 3 monitors the oil temperature in the external oil tank 1 in real time through the oil tank temperature detector 13. When the oil temperature drops to the set value, the oil heating operation needs to be started again;

[0054] 5) Oil recovery and oil pumping: After the test is completed, the test console 3 first controls the first solenoid valve 41 to close, and then turns on the second solenoid valve 43, and at the same time controls the external oil pump 47 to start, and then starts oil pumping, and pumps the residual oil in the oil inlet pipe 4, the tested oil cooler 2 and the oil return pipe 5 back to the external oil tank 1. After the oil pumping is completed, the tested oil cooler 2 can be disassembled.

[0055] And when operating in step 5), since there is no need to test the flow parameters, the sixth ball valve 57 and the seventh ball valve 58 can be closed, and the eighth ball valve 59 can be opened to prevent the oil from passing through the flow meter 55 and the second filter 56, thereby extending the service life of the flow meter 55 and the second filter 56.

[0056] Embodiment 3

[0057] like Figure 3 As shown, the oil cooler test system of this embodiment is used to test a PAX type oil cooler. Since the PA type oil cooler has its own oil pump and internal oil tank, there is no need to start the external oil pump 47, and the oil in the internal oil tank is used for circulating cooling. The test steps are as follows:

[0058] 1) Installation: Connect the tested oil cooler 2 and the external oil tank 1, and connect each electrical component to the test console 3;

[0059] 2) Oil replenishment: Open the ninth ball valve 63 and start the oil replenishment pump 61 at the same time, then the oil in the oil replenishment barrel 62 can be sent into the inner oil tank of the oil cooler 2 to be tested, so that the oil level in the inner oil tank rises to the set height;

[0060] 3) Oil heating: Turn off the oil replenishment pump 61 and the ninth ball valve 63, and open the first ball valve 42, the second ball valve 51, the sixth ball valve 57, the seventh ball valve 58 and the fifth ball valve 71. Close the third ball valve 52, the fourth ball valve 46 and the eighth ball valve 59, so that the inlet pipe 4 and the return pipe 5 are connected through the circulation heating pipe 7, and the inlet pipe 4 and the return pipe 5 are disconnected from the outer oil tank 1. The test console 3 controls the start of the inner oil pump of the oil cooler 2 to be tested and pumps the oil in the inner oil tank for circulation. The oil is heated and raised in temperature after passing through the circulation heater 72, and the heating temperature sensor 73 can detect the oil temperature in real time. When the oil temperature is too high, the test console 3 can control the circulation heater 72 to turn off. When the temperature drops to the set value, the circulation heater 72 is controlled to turn on again to play a role in overheat protection;

[0061] 4) Testing: The test console 3 controls the start of the oil cooler 2 to be tested to perform the cooling operation, simulating the working conditions of the oil cooler 2 to be tested, and automatically detects various parameters during the working process of the oil cooler 2 to be tested through the test console 3. The parameters can be integrated, and parameters such as the refrigerating capacity of the oil cooler 2 to be tested can be calculated. The tested parameters are recorded and printed for future reference, which is convenient for subsequent traceability and statistical summary;

[0062] During the testing process, the test console 3 monitors the oil temperature in real time through the heating temperature sensor 73. When the oil temperature drops to the set value, the circulation heater 72 needs to be started again for oil heating operation.

[0063] 5) Oil recovery pumping: After the test is completed, first open the third ball valve 52 and close the fifth ball valve 71 to restore the connection between the return pipe 5 and the outer oil tank 1. Then the test console 3 controls the start of the inner oil pump of the oil cooler 2 to be tested again, and pumps the oil in the inner oil tank back into the outer oil tank 1 for collection.

[0064] During the operation of step 5), since the flow rate parameter does not need to be tested anymore, the sixth ball valve 57 and the seventh ball valve 58 can be closed, and the eighth ball valve 59 can be opened so that the oil does not pass through the flow meter 55 and the second filter 56, extending the service life of the flow meter 55 and the second filter 56.

[0065] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of brevity of description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope recorded in this specification.

[0066] The above-described embodiments merely represent several implementation manners of the present invention. The description thereof is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several modifications and improvements can still be made, and these should all fall within the protection scope of the present invention. Therefore, the protection scope of the present invention patent shall be subject to the appended claims.

Claims

1. An oil cooler test system, characterized in that: It includes an outer fuel tank (1), an oil cooler under test (2) and a test control console (3). The outer fuel tank (1) and the oil cooler under test (2) are connected by an inlet pipe (4) and a return pipe (5). At least a first solenoid valve (41) and a first ball valve (42) are connected in the inlet pipe (4) line. The inlet pipe (4) is connected to a second solenoid valve (43) through a branch pipe at a position behind the first solenoid valve (41). The inlet pipe (4) is connected to a fourth ball valve (46) and an external oil pump (47) through an oil pump branch pipe at a position between the second solenoid valve (43) and the first ball valve (42). The external oil pump (47) is also electrically connected to the test control console (3). A gate valve (48) is connected at a position of the inlet pipe (4) between the two connection ends of the oil pump branch pipe. At least a second ball valve (51) and a third ball valve (52) are connected in the return pipe (5). An inlet pressure sensor (44) and an inlet temperature sensor (45) are connected at one end of the inlet pipe (4) close to the oil cooler under test (2). An outlet pressure sensor (53) and an outlet temperature sensor (54) are connected at one end of the return pipe (5) close to the oil cooler under test (2). A flow meter (55) is also connected to the return pipe (5). A heater (11), a liquid level switch (12) and a fuel tank temperature detector (13) are connected in the outer fuel tank (1). The outer fuel tank (1) is also connected to a fuel filling bucket (62) through a fuel filling pipe (6) with a fuel filling pump (61). The test control console (3) is electrically connected to control the first solenoid valve (41), the second solenoid valve (43), the inlet pressure sensor (44), the inlet temperature sensor (45), the outlet pressure sensor (53), the outlet temperature sensor (54), the flow meter (55), the heater (11), the liquid level switch (12), the fuel tank temperature detector (13), the fuel filling pump (61) and the sensors connected to the oil cooler under test (2).

2. The oil cooler test system according to claim 1, wherein: A circulation heating pipe (7) is connected at a position of the return pipe (5) between the flow meter (55) and the third ball valve (52). The other end of the circulation heating pipe (7) is connected to a position behind the gate valve (48) of the inlet pipe (4). A fifth ball valve (71) and a circulation heater (72) are connected in the circulation heating pipe (7). The circulation heater (72) is also electrically connected to the test control console (3).

3. The oil cooler testing system according to claim 2, characterized in that: A heating temperature detector (73) is connected at the position of the circulation heater (72). The heating temperature detector (73) is electrically connected to the test control console (3).

4. The oil cooler test system according to claim 2, wherein: A fuel filling branch pipe is connected at the outlet end position of the fuel filling pump (61) in the fuel filling pipe (6). The other end of the fuel filling branch pipe can be connected to the inner fuel tank of the oil cooler under test (2). A ninth ball valve (63) is connected in the fuel filling branch pipe.

5. The oil cooler testing system according to claim 1, wherein: A first filter (49) is connected at the connection end of the inlet pipe (4) where the inlet pipe (4) is connected to the outer fuel tank (1). A second filter (56) is connected in the return pipe (5) in front of the flow meter (55).

6. The oil cooler test system according to claim 5, characterized in that: A sixth ball valve (57) and a seventh ball valve (58) are respectively connected in the return pipe (5) in front of the second filter (56) and behind the flow meter (55).

7. The oil cooler testing system according to claim 6, characterized in that: The return oil pipe (5) is connected to a return branch pipe. The two ends of the return branch pipe are respectively connected to the position of the return oil pipe (5) in front of the sixth ball valve (57) and the position of the return oil pipe (5) behind the seventh ball valve (58). An eighth ball valve (59) is connected to the return branch pipe.

8. The oil cooler testing system according to claim 1, wherein: The heater (11) in the outer oil tank (1) is located at the connection position of the return oil pipe (5) and the outer oil tank (1). The oil tank temperature detector (13) in the outer oil tank (1) is located at the connection position of the inlet oil pipe (4) and the outer oil tank (1). A partition plate (14) is also connected inside the outer oil tank (1). The outer oil tank (1) is also connected to a circulation pipe (8) with a circulation pump (81). The circulation pump (81) is electrically connected to the test control console (3).

9. The oil cooler testing system according to claim 1, characterized in that: A high-pressure sensor, a low-pressure sensor, a current transformer, an inlet air temperature sensor, and an outlet air temperature sensor are arranged in the oil cooler (2) to be measured. The high-pressure sensor, the low-pressure sensor, the current transformer, the inlet air temperature sensor, and the outlet air temperature sensor are all electrically connected to the test control console (3).

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