A cooling system and a control method thereof

Abstract

The application discloses a cooling system and a control method thereof, and the cooling system comprises a controller, an oil circuit, a coolant circuit and a cooling water circuit; the oil circuit comprises a first oil pump, a first oil tank and a second oil pump which are sequentially communicated; the first oil pump is communicated with an oil inlet of a test product through a first flow channel of a first heat exchanger; the second oil pump is communicated with an oil outlet of the test product; a first temperature sensor is arranged between the first flow channel and the oil inlet, and is used for measuring a first temperature of oil input to the oil inlet; in the coolant circuit, a second flow channel of the first heat exchanger, a circulating pump and a third flow channel of a second heat exchanger are sequentially communicated; in the cooling water circuit, a cooling water inlet, an electric regulating two-way valve, a fourth flow channel of the second heat exchanger and a cooling water outlet are sequentially communicated; the controller is electrically connected with the electric regulating two-way valve, so as to regulate the first temperature. The technical scheme provided by the application can improve the temperature control precision of the oil of the cooling system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display liquid cooling devices, and in particular to a cooling system and a control method thereof. BACKGROUND

[0002] In the testing process of many devices, the test object needs to be cooled to simulate the actual working environment or prevent overheating damage, so as to detect the performance of the test object.

[0003] Traditional cooling equipment has problems such as low temperature control accuracy and low cooling efficiency. For example, some cooling equipment cannot accurately adjust the flow and temperature of the cooling medium, resulting in large temperature fluctuations of the test object and affecting the accuracy of the test results. SUMMARY

[0004] The embodiments of the present application provide a cooling system and a control method thereof to improve the temperature control accuracy of the lubricating oil of the cooling system.

[0005] In a first aspect, the embodiments of the present application provide a cooling system, comprising: a controller, a lubricating oil circuit, a carrier refrigerant circuit and a cooling water circuit; the lubricating oil circuit exchanges heat with the carrier refrigerant circuit through a first heat exchanger; the carrier refrigerant circuit exchanges heat with the cooling water circuit through a second heat exchanger;

[0006] The lubricating oil circuit comprises a first oil pump, a first oil tank and a second oil pump connected in sequence through pipelines; the first oil pump is connected to the oil inlet of the test object through a first flow passage of the first heat exchanger; the second oil pump is connected to the oil outlet of the test object; a pipeline between the first flow passage and the oil inlet is provided with a first temperature sensor for measuring the first temperature of the lubricating oil input into the oil inlet; the carrier refrigerant circuit comprises a circulating pump; a second flow passage of the first heat exchanger, the circulating pump and a third flow passage of the second heat exchanger are connected in sequence through pipelines; the cooling water circuit comprises an electrically adjustable two-way valve; a cooling water inlet, the electrically adjustable two-way valve, a fourth flow passage of the second heat exchanger and a cooling water outlet are connected in sequence through pipelines;

[0007] The controller is electrically connected to the first temperature sensor and the electrically adjustable two-way valve respectively, and is used for controlling the first flow of the cooling water entering the fourth flow passage to adjust the first temperature.

[0008] In a second aspect, the embodiments of the present application further provide a control method of a cooling system, which is suitable for the cooling system provided by any of the embodiments of the present application, and the control method of the cooling system comprises:

[0009] If the first temperature is greater than the set temperature range, the controller controls the opening of the electrically-controlled two-way valve to increase, so as to increase the heat absorbed by the cooling water from the coolant; the heat absorbed by the coolant from the lubricating oil increases until the first temperature transmitted by the first temperature sensor to the controller decreases to the set temperature range;

[0010] If the first temperature is less than the set temperature range, the controller controls the opening of the electrically-controlled two-way valve to decrease, so as to decrease the heat absorbed by the cooling water from the coolant; the heat absorbed by the coolant from the lubricating oil decreases until the first temperature transmitted by the first temperature sensor to the controller increases to the set temperature range.

[0011] In the present application, the cooling system comprises a controller, a lubricating oil circuit, a coolant circuit and a cooling water circuit, wherein, in the lubricating oil circuit, a lubricating oil circulation path is formed between an oil outlet of a test object, a second oil pump, a first oil tank, a first oil pump, a first flow passage of a first heat exchanger and an oil inlet of the test object, and a first temperature sensor is arranged at the oil inlet of the test object to measure the first temperature of the lubricating oil input to the oil inlet; in the coolant circuit, a coolant circulation path is formed between a second flow passage of the first heat exchanger, a circulating pump and a third flow passage of a second heat exchanger; in the cooling water circuit, a cooling water circulation path is formed between a cooling water inlet, an electrically-controlled two-way valve, a fourth flow passage of the second heat exchanger and a cooling water outlet; the lubricating oil circuit and the coolant circuit exchange heat through the first heat exchanger, and the coolant circuit and the cooling water circuit exchange heat through the second heat exchanger. The controller can control the opening of the electrically-controlled two-way valve in the cooling water circuit, so as to control the first flow of the cooling water through the fourth flow passage, control the heat obtained by the cooling water from the coolant, control the heat obtained by the coolant from the lubricating oil, and finally control the temperature of the lubricating oil at the oil inlet of the test object. The controller can monitor the first temperature according to the first temperature sensor, and the controller can adjust the electrically-controlled two-way valve to automatically and accurately control the first temperature of the lubricating oil pumped into the test object, so as to accurately control the temperature of the test object, meet the test working condition of the test object, avoid affecting the test result of the test object due to the excessive fluctuation of the temperature of the test object, and improve the cooling efficiency of the cooling system. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 A structural schematic diagram of a cooling system provided by an embodiment of the present application is shown in the figure;

[0013] Figure 2 A structural schematic diagram of another cooling system provided by an embodiment of the present application is shown in the figure;

[0014] Figure 3A flowchart of a control method of a cooling system provided by an embodiment of the present application is shown in the figure.

[0015] Figure 4 A flowchart of another control method of a cooling system provided by an embodiment of the present application is shown in the figure. DETAILED DESCRIPTION

[0016] The present application will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely intended for the purpose of explanation of the present application and are not intended to limit the present application. It should also be noted that, for the purpose of description, only the parts related to the present application are shown in the drawings and not all the structures.

[0017] An embodiment of the present application provides a cooling system, as shown in the figure. Figure 1 Figure 1 A structure diagram of a cooling system provided by an embodiment of the present application is shown in the figure. The cooling system 01 comprises a controller 06, an oil circuit s1, a coolant circuit s2 and a cooling water circuit s3. The oil circuit s1 exchanges heat with the coolant circuit s2 through a first heat exchanger 02. The coolant circuit s2 exchanges heat with the cooling water circuit s3 through a second heat exchanger 03.

[0018] The oil circuit s1 comprises a first oil pump 11, a first oil tank 12 and a second oil pump 13 connected in sequence through pipes. The first oil pump 11 is connected to an oil inlet 101 of a test object 10 through a first flow passage of the first heat exchanger 02. The second oil pump 13 is connected to an oil outlet 102 of the test object 10. A pipe between the first flow passage and the oil inlet 101 is provided with a first temperature sensor 14 for measuring a first temperature of the oil input to the oil inlet 101. The coolant circuit s2 comprises a circulating pump 15. A second flow passage of the first heat exchanger 02, the circulating pump 15 and a third flow passage of the second heat exchanger 03 are connected in sequence through pipes. The cooling water circuit s3 comprises an electrically-controlled two-way valve 16. A cooling water inlet 04, the electrically-controlled two-way valve 16, a fourth flow passage of the second heat exchanger 03 and a cooling water outlet 05 are connected in sequence through pipes.

[0019] The controller 06 is electrically connected to the first temperature sensor 14 and the electrically-controlled two-way valve 16 respectively, for controlling a first flow of the cooling water into the fourth flow passage to adjust the first temperature.

[0020] ​In the embodiment of the present application, the cooling system comprises a controller, an oil circuit, a coolant circuit and a cooling water circuit, wherein an oil circulation path is formed between the oil outlet of the test object, the second oil pump, the first oil tank, the first oil pump, the first flow passage of the first heat exchanger and the oil inlet of the test object in the oil circuit, and the first temperature sensor is arranged at the oil inlet of the test object to measure the first temperature of the oil input to the oil inlet; in the coolant circuit, a coolant circulation loop is formed between the second flow passage of the first heat exchanger, the circulating pump and the third flow passage of the second heat exchanger; in the cooling water circuit, a cooling water circulation loop is formed between the cooling water inlet, the electrically controlled two-way valve, the fourth flow passage of the second heat exchanger and the cooling water outlet; the oil circuit and the coolant circuit exchange heat through the first heat exchanger, and the coolant circuit and the cooling water circuit exchange heat through the second heat exchanger. The controller can control the opening of the electrically controlled two-way valve in the cooling water circuit, thereby controlling the first flow of the cooling water through the fourth flow passage, controlling the heat obtained by the cooling water from the coolant, and further controlling the heat obtained by the coolant from the oil, so as to finally control the temperature of the oil at the oil inlet of the test object. The controller can monitor the first temperature according to the first temperature sensor, and the controller can adjust the electrically controlled two-way valve to automatically and accurately control the first temperature of the oil pumped into the test object, thereby accurately controlling the temperature of the test object, meeting the test working condition of the test object, avoiding the influence of the test test result of the test object due to the large temperature fluctuation of the test object, and improving the cooling efficiency of the cooling system.

[0021] The above is the core idea of the present application, and the technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] The cooling system 01 can include a controller 06, an oil circuit s1, a coolant circuit s2, and a cooling water circuit s3. The oil circuit s1 forms a circulating path of the oil for cooling and cooling the test object by the oil; the coolant circuit s2 forms a circulating path of the coolant, and the heat absorbed by the oil from the test object is transferred out by heat exchange between the oil circuit s1 and the coolant circuit s2 through the first heat exchanger 02; and the cooling water circuit s3 forms a circulating path of the cooling water, and the heat absorbed by the coolant from the oil is further transferred out by heat exchange between the coolant circuit s2 and the cooling water circuit s3 through the second heat exchanger 03. The coolant is a cooling medium, which can be a commonly used cooling medium such as oil or water, and the specific material is not limited in the embodiment. The controller 06 can monitor or control the working state of the oil circuit s1, the coolant circuit s2, and the cooling water circuit s3 to realize temperature control of the test object. In the embodiment, the test object can be applied to test scenes that require accurate control of cooling temperature and flow, such as equipment testing in the fields of aviation, automobile, and electronics.

[0023] Specifically, the oil circuit s1 includes a first oil pump 11, a first oil tank 12, and a second oil pump 13 connected in sequence through pipelines. The first oil pump 11 is used as an oil inlet pump to pump the oil into the oil inlet 101 of the test object 10, and the first heat exchanger 02 is arranged between the first oil pump 11 and the oil inlet 101. The oil is cooled in the first flow passage of the first heat exchanger 02 and then enters the oil inlet 101 of the test object 10. After absorbing the heat generated by the test object 10, the oil is pumped out of the oil outlet 102 of the test object 10 by the second oil pump 13. The second oil pump 13 is used as an oil return pump to pump the oil out of the test object 10 to the first oil tank 12. The first oil tank 12 stores the oil to meet the needs of normal operation of the system, and the user can add and replace the oil through the first oil tank 12. Thereafter, because the temperature of the oil pumped out of the test object 10 is increased, the first oil pump 11 can continue to transmit the oil with increased temperature to the first flow passage of the first heat exchanger 02 for cooling treatment. The first heat exchanger 02 is an oil cooler, which includes a first flow passage for the oil and a second flow passage for the coolant. The first heat exchanger 02 can transfer the heat absorbed by the oil in the test object to the coolant.

[0024] The coolant circuit s2 includes a circulating pump 15, and the second flow passage of the first heat exchanger 02, the circulating pump 15, and the third flow passage of the second heat exchanger 03 are connected in sequence through pipelines to form a circulating path of the coolant. The second heat exchanger 03 is a water-cooled heat exchanger, which includes a third flow passage for the coolant and a fourth flow passage for the cooling water. The circulating pump 15 meets the heat exchange needs between the oil cooler and the water-cooled heat exchanger.

[0025] The cooling water circuit S3 comprises the electrically-controlled two-way valve 16, the cooling water inlet 04, the electrically-controlled two-way valve 16, the fourth flow channel of the second heat exchanger 03, and the cooling water outlet 05, which are sequentially connected by pipes to form a cooling water circulation passage. The controller 06 is electrically connected with the electrically-controlled two-way valve 16, so that the controller 06 can adjust the opening degree of the electrically-controlled two-way valve 16, thereby adjusting the flow rate of the cooling water entering the water-cooled heat exchanger, which can be referred to as the first flow rate in the embodiment. For example, the greater the first flow rate of the cooling water entering the second heat exchanger 03, the better the heat exchange effect; and the smaller the first flow rate of the cooling water entering the second heat exchanger 03, the worse the heat exchange effect. In addition, it should be noted that the controller 06 is also electrically connected with the first temperature sensor 14, which is arranged on the pipe between the first flow channel and the oil inlet 101. When the first temperature sensor 14 measures that the actual oil inlet temperature (the first temperature) of the oil inlet 101 is higher than the set temperature range, the conduction opening degree of the electrically-controlled two-way valve 16 is increased, so that the cooling water entering the water-cooled radiator (the second heat exchanger 03) is increased; the heat absorbed by the cooling water in the water-cooled radiator is increased, the heat absorbed by the heat transfer medium by the cooling water is increased, and the temperature of the heat transfer medium output from the water-cooled radiator is reduced; the heat absorbed by the heat transfer medium in the oil cooler (the first heat exchanger 02) is increased, the heat absorbed by the oil by the heat transfer medium is increased, and the oil inlet temperature of the oil inlet 101 is reduced. In the embodiment, the conduction opening degree of the electrically-controlled two-way valve 16 can be continuously adjusted according to the set temperature range of the first temperature until the actual oil inlet temperature meets the set temperature range. When the first temperature sensor 14 measures that the actual oil inlet temperature (the first temperature) of the oil inlet 101 is lower than the set temperature range, the conduction opening degree of the electrically-controlled two-way valve 16 is reduced, so that the cooling water entering the water-cooled radiator (the second heat exchanger 03) is reduced; the heat absorbed by the cooling water in the water-cooled radiator is reduced, the heat absorbed by the heat transfer medium by the cooling water is reduced, and the temperature of the heat transfer medium output from the water-cooled radiator is increased; the heat absorbed by the heat transfer medium in the oil cooler (the first heat exchanger 02) is reduced, the heat absorbed by the oil by the heat transfer medium is reduced, and the oil inlet temperature of the oil inlet 101 is increased. In the embodiment, the conduction opening degree of the electrically-controlled two-way valve 16 can be continuously adjusted according to the set temperature range of the first temperature until the actual oil inlet temperature meets the set temperature range. The above-mentioned first temperature adjustment method realizes automatic and accurate control of the first temperature of the pump-in oil of the test object, thereby being capable of accurately controlling the temperature of the test object and meeting the working environment or test working condition of the test object, and improving the test effect or working effect of the test object.

[0026] Figure 2Another structural schematic diagram of the cooling system provided by the embodiment of the present application is shown in the figure. Optionally, the lubricating oil circuit s1 can further include a first electromagnetic valve 17 and a second electromagnetic valve 18; the controller 06 is electrically connected to the first electromagnetic valve 17 and the second electromagnetic valve 18 respectively; a first end of the first electromagnetic valve 17 is in communication with one end of the second oil pump 13 close to the oil outlet 102; a second end of the first electromagnetic valve 17 is in communication with one end of the first flow channel close to the first oil pump 11; and the second electromagnetic valve 18 is arranged between the first oil tank 12 and the second oil pump 13. The embodiment can control the conduction and shutdown of the first electromagnetic valve 17 and the second electromagnetic valve 18, and control the cooling system in different working modes. The cooling system provided by the embodiment is suitable for testing various working modes of the test object, and is especially suitable for testing devices in fields such as aviation, automobiles and electronics, which require precise control of cooling temperature and flow. Moreover, the controller 06 can control the conduction and shutdown of the first electromagnetic valve 17 and the second electromagnetic valve 18, so as to realize automatic switching of the cooling system in multiple working modes. For example, for the test object with and without an oil pump, different lubricating oil circuits are needed in the cooling process, so the adaptability of different types of test objects in the prior art is poor. The embodiment can provide different lubricating oil circuits for different types of test objects by controlling the conduction and shutdown of the first electromagnetic valve 17 and the second electromagnetic valve 18, so as to improve the compatibility of the cooling system of the embodiment for different types of test objects while ensuring the temperature regulation accuracy.

[0027] Specifically, referring to Figure 2 Optionally, the cooling system can be configured to: in a first working mode, the controller 06 controls the first electromagnetic valve 17 and the second electromagnetic valve 18 to be off, and controls the first oil pump 11 to be started to inject lubricating oil of a set flow to the test object 10; in a second working mode, the controller 06 controls the first electromagnetic valve 17 to be off, the second electromagnetic valve 18 and the electrically-controlled two-way valve 16 to be on, and controls the first oil pump 11, the second oil pump 13 and the circulating pump 15 to be started to regulate the first temperature of the first test object; the first test object is the test object 10 without an oil pump; in a third working mode, the controller 06 controls the first electromagnetic valve 17 and the electrically-controlled two-way valve 16 to be on, the second electromagnetic valve 18 to be off, and controls the circulating pump 15 to be started to regulate the first temperature of the second test object; the second test object is the test object 10 with an oil pump.

[0028] The cooling system in the embodiment can form a first working mode, a second working mode and a third working mode respectively. Among them, the first working mode is an oil injection mode for the test product 10, the controller 06 controls the first electromagnetic valve 17 and the second electromagnetic valve 18 to be closed, then the lubricating oil in the first oil tank 12 enters the oil inlet 101 of the test product 10 through the first oil pump 11 and the first flow channel of the first heat exchanger 02 in turn, so that the cooling system in the embodiment can be reused as an oil injection device for the test product, and a flow sensor 19 can be arranged near the oil inlet 101 of the test product 10 to inject lubricating oil with a set flow according to the demand of the test product, thereby further improving the compatibility of the cooling system; the second working mode is to cool the first test product, the first test product is a test product 10 without a self-provided oil pump, then the controller 06 controls the first electromagnetic valve 17 to be closed, the second electromagnetic valve 18 and the electrically controlled two-way valve 16 to be turned on, the lubricating oil in the lubricating oil circuit s1 enters the oil outlet 102 of the first test product, the second oil pump 13, the second electromagnetic valve 18, the first oil tank 12, the first oil pump 11, the first flow channel of the first heat exchanger and the oil inlet 101 of the first test product in turn to form a lubricating oil circulation path, in addition, the refrigerant circuit s2 and the cooling water circuit s3 regulate the temperature of the lubricating oil; the third working mode is to cool the second test product, the second test product is a test product 10 with a self-provided oil pump, then the controller 06 controls the first electromagnetic valve 17 and the electrically controlled two-way valve 16 to be turned on, and the second electromagnetic valve 18 to be closed, the lubricating oil in the lubricating oil circuit s1 enters the oil outlet 102 of the first test product, the first electromagnetic valve 17, the first flow channel of the first heat exchanger and the oil inlet 101 of the first test product in turn to form a lubricating oil circulation path, that is, the lubricating oil provided by the second test product itself forms a circulation, and the self-provided lubricating oil is temperature-regulated by the refrigerant circuit s2 and the cooling water circuit s3. It should be noted that, as shown in Figure 2 the second working mode and the third working mode differ in that the second working mode controls the lubricating oil in the first oil tank 12 to form a circulation, and the third working mode controls the lubricating oil inside the test product with a self-provided oil pump to form a circulation outside and be temperature-regulated. The above-mentioned multiple working modes can make the cooling system in the embodiment applied to more scenes and improve the adaptability of the cooling system. The working mode limitation of the existing cooling system is solved, and the problem that it is difficult to accurately meet the cooling demand of different test products and test working conditions is solved.

[0029] With reference to Figure 1 and Figure 2Optionally, the coolant circuit s2 can further comprise a second oil tank 25 and a pipeline electric heater 26. The second oil tank 25 is used to supplement or replace the coolant of the coolant circuit s2. Optionally, the second oil tank 25 can be further provided with a quick plug oil supplement connector 251 for supplementing the coolant through the quick plug oil supplement connector 251. In addition, the second oil tank 25 can be further provided with a liquid level switch 252 capable of sending a liquid supplement prompt when the liquid level is below a certain scale. The pipeline electric heater 26 is used to raise the temperature of the coolant. It should be noted that when the oil temperature is low and does not meet the working or testing requirements of the test object, the controller 06 can control the pipeline electric heater 26 to heat and raise the temperature of the coolant, so as to raise the temperature of the oil through the first heat exchanger 02. The design of the pipeline electric heater 26 in this embodiment makes the cooling system not only capable of lowering the temperature of the oil, but also capable of raising the temperature of the oil, realizes a wider range of temperature adjustment, and improves the applicability of the cooling system.

[0030] With reference to the foregoing Figure 2 Optionally, the oil circuit s1 can further comprise a first check valve 20 and a second check valve 21. The first check valve 20 is arranged on the pipeline between the first oil pump 11 and the first flow channel. The second check valve 21 is arranged on the pipeline between the first electromagnetic valve 17 and the first flow channel. The first check valve 20 is arranged in the first working mode and the second working mode in the circulation path of the oil, so as to ensure that the oil flows from the first oil pump 11 to the first flow channel. The second check valve 21 is arranged in the circulation path of the oil in the third working mode, so as to ensure that the oil flows from the first electromagnetic valve 17 to the first flow channel. The first check valve 20 and the second check valve 21 effectively prevent the backflow of the oil, and further improve the reliability of the cooling system.

[0031] With reference to the foregoing Figure 1 And Figure 2 Optionally, the oil circuit s1 can further comprise a first quick plug connector 271 and a second quick plug connector 272. The oil circuit s1 is connected to the oil inlet 101 through the first quick plug connector 271. The oil circuit s1 is connected to the oil outlet 102 through the second quick plug connector 272. In this embodiment, the oil circuit s1 establishes a communication path with the test object through the first quick plug connector 271 and the second quick plug connector 272, respectively, thereby improving the convenience of establishing the communication path. In addition, different types of test objects are provided with quick plug connectors of the same specification. Therefore, the cooling system in this embodiment can be connected to different types of test objects through the quick plug connectors, so as to improve the working efficiency of the cooling system and further enhance the compatibility of the cooling system.

[0032] With reference to the foregoing Figure 1 And Figure 2Optionally, the lubricating oil circuit s1 can further comprise a flow sensor 19. The flow sensor 19 is arranged on the pipeline between the first flow channel and the oil inlet 101, and is configured to detect the second flow of the lubricating oil input into the oil inlet 101. The flow sensor 19 can be electrically connected to the controller 06. When the flow of the lubricating oil pumped into the oil inlet 101 needs to be controlled, the controller 06 can control the pump speed of the first oil pump 11 or the second oil pump 13 according to the second flow output by the flow sensor 19, so as to further improve the accuracy of the lubricating oil flow pumped into the cooling system.

[0033] With reference to the foregoing Figure 1 and Figure 2 Optionally, the lubricating oil circuit s1 can further comprise a second temperature sensor 22, a first pressure sensor 231, a second pressure sensor 232, a first filter 241 and a second filter 242. The first pressure sensor 231 and the first filter 241 are arranged on the pipeline between the first flow channel and the oil inlet 101. The second temperature sensor 22, the second pressure sensor 232 and the second filter 242 are arranged on the pipeline between the oil outlet 102 and the second oil pump 13. The second temperature sensor 22 is configured to measure the temperature of the lubricating oil pumped out of the cooling system. The first pressure sensor 231 is configured to measure the pipeline pressure of the oil inlet 101. The second pressure sensor 232 is configured to measure the pipeline pressure of the oil outlet 102. The first filter 241 and the second filter 242 are configured to filter the contaminants in the pipeline, so as to prevent the contaminants from entering the cooling system and the cooling system. The above-mentioned components work together to ensure the normal operation of the cooling system. It should be noted that each device arranged in the embodiment can be electrically connected to the controller 06, so that the controller 06 can control each device to perform each operation and detect each data of the cooling system, so as to improve the automation degree of the cooling system. The embodiment can have an intelligent control system, which is equipped with a plurality of high-precision sensors and can monitor the key parameters such as the temperature, flow and pressure of the cooling system in real time. Based on the monitoring data, the control system can automatically realize a plurality of working modes and accurately adjust the temperature.

[0034] Based on the same concept, the embodiment of the present application further provides a control method of a cooling system. Figure 3 The flow chart of the control method of the cooling system provided by the embodiment of the present application is shown in Figure 3 The method of the embodiment comprises the following steps:

[0035] In step S110, if the first temperature is greater than the set temperature range, the controller controls the opening degree of the electrically-controlled two-way valve to increase, so as to increase the heat absorbed by the cooling water from the refrigerant. The heat absorbed by the refrigerant from the lubricating oil increases, and the first temperature transmitted to the controller by the first temperature sensor decreases to the set temperature range.

[0036] If the first temperature is less than the set temperature range, the controller controls the opening of the electrically-controlled two-way valve to decrease, so as to decrease the heat absorbed by the cooling water from the coolant; the heat absorbed by the coolant from the lubricating oil decreases until the first temperature transmitted by the first temperature sensor to the controller rises to the set temperature range.

[0037] In the embodiment of the present application, the cooling system comprises a controller, a lubricating oil circuit, a coolant circuit and a cooling water circuit. In the lubricating oil circuit, a lubricating oil circulation path is formed between an oil outlet of a test object, a second oil pump, a first oil tank, a first oil pump, a first flow passage of a first heat exchanger and an oil inlet of the test object. A first temperature sensor is arranged at the oil inlet of the test object to measure the first temperature of the lubricating oil input to the oil inlet. In the coolant circuit, a coolant circulation path is formed between a second flow passage of the first heat exchanger, a circulating pump and a third flow passage of a second heat exchanger. In the cooling water circuit, a cooling water circulation path is formed between a cooling water inlet, an electrically-controlled two-way valve, a fourth flow passage of the second heat exchanger and a cooling water outlet. The lubricating oil circuit and the coolant circuit exchange heat through the first heat exchanger, and the coolant circuit and the cooling water circuit exchange heat through the second heat exchanger. The controller controls the opening of the electrically-controlled two-way valve in the cooling water circuit, so as to control the first flow of the cooling water through the fourth flow passage, control the heat obtained by the cooling water from the coolant, control the heat obtained by the coolant from the lubricating oil, and finally control the temperature of the lubricating oil at the oil inlet of the test object. The controller can monitor the first temperature according to the first temperature sensor, and adjust the electrically-controlled two-way valve to automatically and accurately control the first temperature of the lubricating oil pumped into the test object, so as to accurately control the temperature of the test object, meet the test working condition of the test object, avoid affecting the test result of the test object due to the large temperature fluctuation of the test object, and improve the cooling efficiency of the cooling system.

[0038] On the basis of the above embodiment, the lubricating oil circuit further comprises a first electromagnetic valve and a second electromagnetic valve; the controller is electrically connected with the first electromagnetic valve and the second electromagnetic valve; a first end of the first electromagnetic valve is communicated with one end of the second oil pump close to the oil outlet; a second end of the first electromagnetic valve is communicated with one end of the first flow passage close to the first oil pump; and the second electromagnetic valve is arranged between the first oil tank and the second oil pump. Figure 4 As shown in FIG. 4, Figure 4 FIG. 5 is a flowchart of another control method of the cooling system according to an embodiment of the present application, and the method comprises the following steps: Figure 4

[0039] In the first working mode, the controller controls the first electromagnetic valve and the second electromagnetic valve to be closed, and controls the first oil pump to be started to inject the lubricating oil of the set flow to the test object.​

[0040] Step S220, in the second working mode, the controller controls the first electromagnetic valve to be closed, the second electromagnetic valve and the electrically-controlled two-way valve to be turned on, and controls the first oil pump, the second oil pump and the circulating pump to be started, so as to regulate the first temperature of the first test object; the first test object is a test object without self-oil pump.

[0041] Step S230, in the third working mode, the controller controls the first electromagnetic valve and the electrically-controlled two-way valve to be turned on, the second electromagnetic valve to be closed, and controls the circulating pump to be started, so as to regulate the first temperature of the second test object; the second test object is a test object with self-oil pump.

[0042] The embodiment can control the turning on and off of the first electromagnetic valve and the second electromagnetic valve, and control the cooling system in different working modes. The first working mode is an oil injection mode of the test object, the second working mode is a temperature regulation mode of the test object without self-oil pump, and the third working mode is a temperature regulation mode of the test object with self-oil pump. The cooling system provided by the embodiment can be applied to more scenes and improve the adaptability of the cooling system. The embodiment solves the problem that the existing cooling system has limited working modes and is difficult to accurately meet the cooling requirements of different test objects and test conditions.

[0043] Note that the above are only the preferred embodiments of the present application and the technical principles applied. Those skilled in the art will understand that the present application is not limited to the specific embodiments described herein, and those skilled in the art can make various obvious changes, re-adjustments and substitutions without departing from the scope of the present application. Therefore, although the present application has been described in more detail through the above embodiments, the present application is not limited to the above embodiments, and can include more other equivalent embodiments without departing from the concept of the present application, and the scope of the present application is determined by the scope of the appended claims.

Claims

1. A cooling system, characterized in that: include: Controller, lubricating oil circuit, brine circuit and cooling water circuit; the lubricating oil circuit exchanges heat with the brine circuit through a first heat exchanger; the brine circuit exchanges heat with the cooling water circuit through a second heat exchanger; The lubricating oil circuit includes a first oil pump, a first oil tank, and a second oil pump connected in sequence by pipelines; the first oil pump is connected to the oil inlet of the test article through the first flow channel of the first heat exchanger; the second oil pump is connected to the oil outlet of the test article; a first temperature sensor is provided in the pipeline between the first flow channel and the oil inlet for measuring a first temperature of the lubricating oil input to the oil inlet; the coolant circuit includes a circulating pump; the second flow channel of the first heat exchanger, the circulating pump, and the third flow channel of the second heat exchanger are connected in sequence by pipelines; the cooling water circuit includes an electrically adjustable two-way valve; the cooling water inlet, the electrically adjustable two-way valve, the fourth flow channel of the second heat exchanger, and the cooling water outlet are connected in sequence by pipelines; The controller is electrically connected to the first temperature sensor and the electric regulating two-way valve, respectively, and is used to control a first flow rate of cooling water entering the fourth flow channel to adjust the first temperature; The lubricating oil circuit further includes: a first solenoid valve and a second solenoid valve; the controller is electrically connected to the first solenoid valve and the second solenoid valve respectively; The first end of the first solenoid valve is in communication with an end of the second oil pump close to the oil outlet; the second end of the first solenoid valve is in communication with an end of the first flow channel close to the first oil pump; The second solenoid valve is arranged between the first oil tank and the second oil pump; The cooling system is configured to: In the first working mode, the controller controls the first solenoid valve and the second solenoid valve to be turned off, and controls the first oil pump to be started to inject a set flow of lubricating oil into the test article; In the second working mode, the controller controls the first solenoid valve to be closed, the second solenoid valve and the electric regulating two-way valve to be connected, and controls the first oil pump, the second oil pump and the circulation pump to start, so as to adjust the first temperature of the first test product; the first test product is a test product that does not have its own oil pump; In the third working mode, the controller controls the first solenoid valve and the electric regulating two-way valve to be turned on, the second solenoid valve to be turned off, and controls the circulation pump to start to adjust the first temperature of the second test sample; the second test sample is a test sample with its own oil pump.

2. The cooling system according to claim 1, characterized in that The coolant circuit further includes: a second oil tank and a pipeline electric heater; The second oil tank is used to replenish or replace the coolant in the coolant circuit; the pipeline electric heater is used to increase the temperature of the coolant.

3. The cooling system according to claim 1, characterized in that The lubricating oil circuit further includes: a first check valve and a second check valve; The first check valve is arranged on the pipeline between the first oil pump and the first flow channel; the second check valve is arranged on the pipeline between the first solenoid valve and the first flow channel.

4. The cooling system according to claim 1, wherein: The lubricating oil circuit further includes: a first quick-connect connector and a second quick-connect connector; The lubricating oil circuit is plugged into the oil inlet through the first quick-plug connector; the lubricating oil circuit is plugged into the oil outlet through the second quick-plug connector.

5. The cooling system according to claim 1, wherein: The lubricating oil circuit further includes: a flow sensor; the flow sensor is arranged on a pipeline between the first flow channel and the oil inlet, and is used to detect a second flow rate of the lubricating oil input into the oil inlet.

6. The cooling system according to claim 1, wherein: The lubricating oil circuit further includes: a second temperature sensor, a first pressure sensor, a second pressure sensor, a first filter and a second filter; The first pressure sensor and the first filter are arranged on the pipeline between the first flow channel and the oil inlet; the second temperature sensor, the second pressure sensor and the second filter are arranged on the pipeline between the oil outlet and the second oil pump.

7. A method for controlling a cooling system, characterized in that: Applicable to the cooling system according to any one of claims 1 to 6 above, the control method of the cooling system includes: If the first temperature is greater than the set temperature range, the controller controls the electric regulating two-way valve to increase its opening, thereby increasing the amount of heat absorbed by the cooling water from the brine; the amount of heat absorbed by the brine from the lubricating oil increases until the first temperature transmitted to the controller by the first temperature sensor drops to within the set temperature range; If the first temperature is lower than the set temperature range, the controller controls the electric regulating two-way valve to decrease its opening to reduce the amount of heat absorbed by the cooling water from the brine; the amount of heat absorbed by the brine from the lubricating oil decreases until the first temperature transmitted to the controller by the first temperature sensor rises to within the set temperature range. The lubricating oil circuit further includes: a first solenoid valve and a second solenoid valve; the controller is electrically connected to the first solenoid valve and the second solenoid valve, respectively; a first end of the first solenoid valve is in communication with an end of the second oil pump near the oil outlet; a second end of the first solenoid valve is in communication with an end of the first flow channel near the first oil pump; the second solenoid valve is disposed between the first oil tank and the second oil pump; The control method of the cooling system further includes: In the first working mode, the controller controls the first solenoid valve and the second solenoid valve to be turned off, and controls the first oil pump to start, so as to inject a set flow of lubricating oil into the test article; In the second working mode, the controller controls the first solenoid valve to be closed, the second solenoid valve and the electric regulating two-way valve to be connected, and controls the first oil pump, the second oil pump and the circulation pump to start, so as to adjust the first temperature of the first test product; the first test product is a test product that does not have its own oil pump; In the third working mode, the controller controls the first solenoid valve and the electric regulating two-way valve to be turned on, the second solenoid valve to be turned off, and controls the circulation pump to start to adjust the first temperature of the second test sample; the second test sample is a test sample with its own oil pump.

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