An on-board product thermostatic liquid cooling system and method

Abstract

The application discloses an airborne product constant-temperature liquid cooling system and method, and belongs to the technical field of equipment heat dissipation. The airborne product constant-temperature liquid cooling system divides airborne cooling liquid into two paths through a three-way electromagnetic valve, one path flows through a thermoelectric refrigerator to refrigerate a constant-temperature object, and the other path flows through a high heat consumption device. The flow distribution of the electromagnetic valve and the input current and voltage of the thermoelectric refrigerator are regulated and controlled through a control module, so that the control of one path constant-temperature and one path heat dissipation is realized. The constant-temperature liquid cooling system reasonably utilizes the liquid cooling resources on the machine, is not affected by the large temperature change range of the airborne cooling liquid, can realize the constant-temperature control of the constant-temperature object in the airborne product, and guarantees the heat dissipation demand of the other path to the high heat consumption device.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of equipment heat dissipation, and particularly relates to an airborne product constant-temperature liquid cooling system and method. BACKGROUND

[0002] The external thermal environment of an airborne photoelectric product is relatively severe, and temperature change often directly affects product performance. With more and more functions and higher and higher performance indexes of a new generation of airborne photoelectric products, the heat consumption of internal electronic devices of the products is continuously increasing, and the problem of performance index decline caused by temperature factors is increasingly prominent. Therefore, it is necessary to carry out thermal control design technical requirements of an airborne photoelectric system, control temperature distribution and uniformity of the system, and especially for photoelectric products that need to work at constant temperature, it is necessary to make them work at constant temperature in the best working state. Meanwhile, with the continuous development of electronic components, the power density of airborne components is greatly improved, and the volume heat power of the equipment during work is greatly increased. For some precision equipment, it is very important to timely dissipate the heat generated by the electronic components in the equipment to the environment to keep the equipment in a normal working temperature, which is of great significance to the reliability of the equipment.

[0003] At present, liquid cooling is a widely used heat dissipation method for medium and high power density equipment. It can quickly take away the heat generated by each component in the electronic equipment, and has high working reliability and stability.

[0004] As one of the aircraft mission systems, with the continuous increase of the power density of avionics, the traditional air-conditioning air cooling system in the air has been difficult to meet the heat dissipation demand. The liquid cooling resource of the airborne photoelectric product is supplied by the aircraft, and due to the different flight altitudes, regions and postures during the execution of the task of the aircraft, the temperature of the cooling liquid of the aircraft liquid cooling system changes with the flight state in the air, so that the temperature of the cooling liquid on the aircraft changes greatly (the temperature range is about 0℃-60℃). The cooling liquid of the aircraft liquid cooling system is the input source of the liquid cooling system of the airborne photoelectric product, and the temperature change of the cooling liquid supplied by the aircraft has a great influence on the control system of the airborne photoelectric product. In the past, the utilization of the liquid cooling resource on the aircraft by the airborne photoelectric product was mainly to directly introduce the cooling liquid, and it was impossible to respond to the temperature change of the cooling liquid on the aircraft. How to reasonably utilize the airborne liquid cooling resource to realize the constant temperature control of the constant temperature object in the airborne photoelectric product that needs to work at constant temperature and realize the liquid cooling heat dissipation of the high heat consumption device in the airborne photoelectric product is worth studying. SUMMARY

[0005] Technical problems to be solved:

[0006] In order to avoid the shortcomings of the prior art, the present application provides an airborne product constant-temperature liquid cooling system, which divides the airborne cooling liquid into two paths through a three-way electromagnetic valve, one path flows through a constant-temperature object cooled by a thermoelectric refrigerator, and the other path flows through a high heat dissipation device, the flow distribution of the electromagnetic valve and the input current and voltage of the thermoelectric refrigerator are regulated by a control module to realize the control of constant temperature and heat dissipation of one path. The present application solves the problems in the prior art that the temperature of the airborne cooling liquid changes greatly, it is difficult to control the constant temperature of the constant-temperature control object in the airborne photoelectric product, and the high heat dissipation device needs to be cooled in time.

[0007] The technical scheme of the present application is: an airborne product constant-temperature liquid cooling system, comprising a cooling liquid circulation module, the cooling liquid circulation module is a cooling liquid circulation system provided by an airplane, used for providing cooling liquid; further comprising an electromagnetic valve, a thermoelectric refrigerator, a first liquid cooling plate, a second liquid cooling plate, a control module and a temperature acquisition module.

[0008] The electromagnetic valve is a three-way electromagnetic valve, the inlet of the electromagnetic valve is connected to the cooling liquid, the first outlet of the electromagnetic valve is connected to the inlet of the first liquid cooling plate through a pipeline, and the outlet of the first liquid cooling plate is connected to the cooling liquid circulation module through a pipeline; the second outlet of the electromagnetic valve is connected to the inlet of the second liquid cooling plate through a pipeline, and the outlet of the second liquid cooling plate is connected to the cooling liquid circulation module through a pipeline.

[0009] The first liquid cooling plate is installed on the hot end of the thermoelectric refrigerator and used for cooling the hot end of the thermoelectric refrigerator; the cold end of the thermoelectric refrigerator is connected to a constant-temperature object, and the thermoelectric refrigerator is used for controlling the temperature of the constant-temperature object; the second liquid cooling plate is installed on a high heat dissipation device and used for cooling the high heat dissipation device.

[0010] The temperature acquisition module is used for acquiring the temperature of the cooling liquid, the temperature of the constant-temperature object and the temperature of the high heat dissipation device, and feeding back the acquired data to the control module.

[0011] The control module is electrically connected with the electromagnetic valve and the thermoelectric refrigerator, and is used for controlling the opening degree of the first outlet of the electromagnetic valve and the input current and voltage of the thermoelectric refrigerator.

[0012] The further technical scheme of the present application is: the temperature acquisition module comprises a first temperature sensor, a second temperature sensor and a third temperature sensor; the first temperature sensor is installed at the inlet of the electromagnetic valve and used for monitoring the temperature of the cooling liquid entering the electromagnetic valve; the second temperature sensor is installed on the constant-temperature object to be regulated and used for monitoring the temperature of the constant-temperature object; the third temperature sensor is installed on the high heat dissipation device and used for monitoring the temperature of the high heat dissipation device; the three temperature sensors are electrically connected with the control module respectively and transmit the monitored temperature to the control module in real time.

[0013] A further technical solution of the present application is that the constant-temperature liquid cooling system further comprises a three-way joint, a first inlet of the three-way joint is connected to an outlet of the first liquid cooling plate through a pipeline, a second inlet of the three-way joint is connected to an outlet of the second liquid cooling plate through a pipeline, and an outlet of the three-way joint is connected to the cooling liquid circulating module through a pipeline.

[0014] A further technical solution of the present application is that the control module sets a target temperature for the constant-temperature object, and the control module compares the temperature data transmitted by the temperature acquisition module with the target temperature, and then automatically regulates the flow of the first outlet of the electromagnetic valve and the voltage and current of the thermoelectric cooler.

[0015] A further technical solution of the present application is that the thermoelectric cooler is installed on the constant-temperature object through a structural gasket, the structural gasket is fixed above the constant-temperature object, a through inner recess is arranged at the center of the structural gasket, and the shape of the inner recess is consistent with the shape of the thermoelectric cooler; the thermoelectric cooler is embedded in the inner recess, the cold end of the thermoelectric cooler is in contact with the constant-temperature object for cooling the constant-temperature object, and the hot end of the thermoelectric cooler is in contact with the first liquid cooling plate to take away the heat of the hot end through the cooling liquid flowing through the first liquid cooling plate.

[0016] A further technical solution of the present application is that the electromagnetic valve comprises a valve seat and a stepping motor integrated in the valve seat; the valve seat is provided with an inlet, a first outlet and a second outlet in communication; the stepping motor is provided with a telescopic motor rod, the motor rod is located in the valve seat, and the motor rod is driven by the stepping motor to extend or retract for adjusting the opening degree of the first outlet and then adjusting the flow of the cooling liquid entering the first liquid cooling plate; the stepping motor is electrically connected with the control module to receive the control instruction of the control module.

[0017] A further technical solution of the present application is that the electromagnetic valve is provided with a regulating valve controller, the regulating valve controller is installed in the control module and is electrically connected with the control module; the stepping motor is electrically connected with the regulating valve controller to receive the working instruction of the control module through the regulating valve controller.

[0018] A method for constant-temperature liquid cooling of airborne products by using a constant-temperature liquid cooling system, comprising the following steps:

[0019] Step 1, setting a target temperature of the constant-temperature object in the control module;

[0020] Step 2, starting the cooling liquid circulating module by the aircraft control system, collecting the temperature of the cooling liquid, the temperature of the constant-temperature object and the temperature of the high-heat-consuming device in real time by the temperature acquisition module, feeding back the collected information to the control module, and determining whether the constant-temperature object needs to be heated or cooled according to the requirement of the target temperature.

[0021] Step 3, the control module sends control signals to the electromagnetic valve and the thermoelectric refrigerator according to the determination result of step 2; the control module controls the stepping motor to act, so that the motor rod is retracted and extended, thereby adjusting the flow of the cooling liquid flowing out of the first outlet; the control module adjusts the voltage and current at the two ends of the thermoelectric refrigerator according to the difference between the actual measured temperature of the constant temperature object and the target temperature; until the constant temperature object reaches the set target temperature;

[0022] Step 4, the cooling liquid flowing out of the second outlet of the electromagnetic valve flows through the second liquid cooling plate to cool the high heat consumption device.

[0023] Beneficial effects

[0024] The beneficial effects of the present application are that the airborne product constant temperature liquid cooling system uses a thermoelectric refrigerator to cool the constant temperature object, provides a cooling liquid source for the airborne product by introducing the cooling liquid circulation system of the aircraft, and divides the cooling liquid into two paths, one of which is used for heat dissipation of the hot end of the thermoelectric refrigerator, and the other of which is used for heat dissipation of the high heat consumption device inside the product. Since the temperature of the liquid cooling resource of the on-board cooling liquid circulation system changes with the flight state of the aircraft, the temperature changes greatly, and the temperature range is about 0℃-60℃. In order to cope with different temperature conditions, the present application reasonably utilizes the on-board liquid cooling resource and designs a controllable liquid cooling flow distribution system. The constant temperature liquid cooling system can monitor the temperature of the cooling liquid and the temperature of the constant temperature object in real time. By controlling the size of the cooling liquid flow of the first outlet of the electromagnetic valve and the size of the voltage and current at the two ends of the thermoelectric refrigerator according to the monitoring data, the constant temperature control of the constant temperature object in the airborne product can be realized, and the heat dissipation demand of the high heat consumption device in the other path can be ensured.

[0025] The airborne product constant temperature liquid cooling system of the present application has the advantages of simple structure, easy operation and implementation, effective utilization of the aircraft cooling liquid source, and significant temperature control effect without being affected by the temperature change of the airborne cooling liquid source. BRIEF DESCRIPTION OF DRAWINGS

[0026] Figure 1 The system block diagram of the constant temperature liquid cooling system of the present application is shown in the figure;

[0027] Figure 2 The control principle diagram of the constant temperature liquid cooling system of the present application is shown in the figure;

[0028] Figure 3 The structure schematic diagram of the electromagnetic valve of the present application is shown in the figure;

[0029] Figure 4 The internal structure schematic diagram of the electromagnetic valve of the present application is shown in the figure;

[0030] Figure 5 The installation structure schematic diagram of the first liquid cooling plate, the thermoelectric refrigerator and the constant temperature object of the present application is shown in the figure;

[0031] Figure 6The first liquid cooling plate, thermoelectric refrigerator and mounting structure of the constant temperature object of the present application are shown in the exploded view.

[0032] Reference signs: 1. solenoid valve, 11. solenoid valve inlet, 12. first outlet, 13. second outlet, 14. valve seat, 15. stepper motor, 16. motor rod, 2. thermoelectric refrigerator, 21. cold end, 22. hot end, 3. first liquid cooling plate, 31. inlet of the first liquid cooling plate, 32. outlet of the first liquid cooling plate, 4. second liquid cooling plate, 5. constant temperature object, 6. high heat consumption device, 7. first temperature sensor, 8. tee joint, 9. structural gasket, 10. screw. DETAILED DESCRIPTION

[0033] The embodiments described below with reference to the drawings are exemplary and are intended to explain the present application, and cannot be understood as a limitation of the present application.

[0034] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation of the present application.

[0035] Example 1:

[0036] Referring to Figure 1 , the present embodiment provides an airborne product constant temperature liquid cooling system, which comprises a cooling liquid circulation module, the cooling liquid circulation module being a cooling liquid circulation system provided by the aircraft, and being used to provide a cooling liquid source for the constant temperature liquid cooling system. The cooling liquid circulation module can deliver cooling liquid with a certain flow rate (the flow rate range being 1-10 L / min), temperature (the temperature range being 0-60℃) and pressure to the constant temperature liquid cooling system of the present application.

[0037] The airborne product constant temperature liquid cooling system of the present application further comprises a solenoid valve 1, a thermoelectric refrigerator 2, a first liquid cooling plate 3, a second liquid cooling plate 4, a tee joint 8, a control module and a temperature acquisition module.

[0038] Referring to Figure 1 , 3, 4, the electromagnetic valve 1 is a three-way electromagnetic valve, including a valve seat 14 and a stepper motor 15 integrated in the valve seat 14. The valve seat 14 is provided with three valve ports in communication, including an electromagnetic valve inlet 11, a first outlet 12 and a second outlet 13. The electromagnetic valve inlet 11 is connected to the cooling liquid circulating module, the first outlet 12 of the electromagnetic valve 1 is connected to the inlet 31 of the first liquid cooling plate 3 through a pipeline, and the outlet 32 of the first liquid cooling plate 3 is connected to the first inlet of the three-way joint 8 through a pipeline. The second outlet 13 of the electromagnetic valve is connected to the inlet of the second liquid cooling plate 4 through a pipeline, and the outlet of the second liquid cooling plate is connected to the second inlet of the three-way joint 8 through a pipeline. The three-way joint 8 is a general three-way joint, and its outlet is connected to the cooling liquid circulating module through a pipeline to form a circulating loop. The cooling liquid from the electromagnetic valve inlet 11 is divided into two paths by the electromagnetic valve 1, one path flows through the first liquid cooling plate 3 and then enters the cooling liquid circulating module, and the other path flows through the second liquid cooling plate 4 and then enters the cooling liquid circulating module.

[0039] The stepper motor 15 has a retractable motor rod 16, which is located inside the valve seat 14. The motor rod 16 is driven to extend and retract by the stepper motor 15, so that the motor rod 16 can block the first outlet 12 to different degrees, thereby adjusting the opening degree of the first outlet 12, and further adjusting the flow of cooling liquid into the first liquid cooling plate 3, and realizing the flow adjustment of the two branches. The stepper motor 15 is electrically connected with the control module and receives control instructions from the control module.

[0040] Referring to Figure 1 、 5 , 6, the first liquid cooling plate 3 is installed on the hot end 22 of the thermoelectric cooler 2 (i.e. TEC), and is used for heat dissipation of the hot end 22 of the thermoelectric cooler 2. The cold end 21 of the thermoelectric cooler 2 is connected to the constant temperature object 5, and the thermoelectric cooler 2 is used for temperature control of the constant temperature object 5. After the thermoelectric cooler 2 is powered on, the cold end 21 is cooled and the hot end 22 is heated to realize temperature regulation and control. The refrigeration capacity of the thermoelectric cooler 2 is determined by the heat dissipation capacity of the hot end 22 and the input voltage and current. The second liquid cooling plate 4 is fixedly installed on the high heat consumption device 6, and is used for heat dissipation of the high heat consumption device 6. The internal flow channel structure of the first liquid cooling plate 3 and the second liquid cooling plate 4 is optimized and designed, and the heat dissipation capacity of the two liquid cooling plates is enhanced in a given space range. The thermoelectric cooler 2 is electrically connected with the control module, and the voltage and current at both ends of the thermoelectric cooler 2 are controlled by the control module to realize temperature control.

[0041] Specifically, the thermoelectric cooler 2 is installed on the constant temperature object 5 through a structural gasket 9, and the constant temperature object 5 in this embodiment is specifically an optical barrel. The structural gasket 9 is fixed above the constant temperature object 5 through a screw 10, and the structural gasket 9 is provided with a through inner recess at the center, and the profile of the inner recess is consistent with the shape of the thermoelectric cooler 2. The thermoelectric cooler 2 is embedded in the inner recess, the cold end 21 of the thermoelectric cooler 2 is in contact with the constant temperature object 5, the cold end 21 is cooled, and is used for cooling the constant temperature object 5, and the hot end 22 is in contact with the first liquid cooling plate 3, the hot end 22 is heated, and the heat of the hot end 22 is taken away through the cooling liquid flowing through the first liquid cooling plate 3. The first liquid cooling plate 3 is installed above the thermoelectric cooler 2, and the first liquid cooling plate 3 is provided with screw holes at four corners matched with the four corners of the structural gasket 9. The first liquid cooling plate 3, the structural gasket 9 and the upper end surface of the optical barrel of the constant temperature object 5 are fixed and connected in sequence through the screws.

[0042] The temperature acquisition module in this embodiment is specifically three temperature sensors, and the temperature acquisition module is used for acquiring the temperature of the cooling liquid, the temperature of the constant temperature object 5 and the temperature of the high heat consumption device 6, and feeding back the acquired data to the control module.

[0043] Specifically, the temperature acquisition module includes a first temperature sensor 7, a second temperature sensor and a third temperature sensor. The first temperature sensor 7 is integrally installed at the inlet 11 of the electromagnetic valve 1, and is used for monitoring the temperature of the cooling liquid entering the electromagnetic valve 1 in real time. The second temperature sensor is installed on the constant temperature object 5 to be controlled, and is used for monitoring the temperature of the constant temperature object 5 in real time. The third temperature sensor is installed on the high heat consumption device 6 (such as a laser component, a circuit board component, etc.), and is used for monitoring the temperature of the high heat consumption device 6 in real time. The three temperature sensors are electrically connected with the control module respectively, and transmit the monitored temperature to the control module for data processing in real time.

[0044] The control module sets a target temperature for the constant temperature object 5, compares the real-time temperature data of the constant temperature object 5 with the target temperature according to the temperature data acquired by the temperature acquisition module, adjusts the flow of the first outlet 12 of the electromagnetic valve according to the current cooling liquid temperature and the temperature of the high heat consumption device 6 to perform cooling liquid flow distribution, and adjusts the voltage and current of the thermoelectric cooler 2 to adjust the refrigeration capacity of the thermoelectric cooler 2 to realize temperature control of the constant temperature object 5. The control module is electrically connected with the electromagnetic valve 1 and the thermoelectric cooler 2, and is used for controlling the opening degree of the first outlet 12 of the electromagnetic valve 1 and the input current and voltage of the thermoelectric cooler 2 to realize temperature control of the constant temperature object 5.

[0045] In this embodiment, the electromagnetic valve 1 is equipped with a regulating valve controller, which is installed in the control module and electrically connected with the control module. The stepper motor 15 is electrically connected with the regulating valve controller, receives the working instructions of the control module through the regulating valve controller, controls the stepper motor 15 to drive the motor rod 16 to extend or retract, and realizes the flow regulation of the first outlet 12 of the electromagnetic valve.

[0046] The control module is specifically a control circuit board, which is internally provided with a control algorithm. The control module can realize the data acquisition and storage of the temperature acquisition module, compare the collected temperature data with the target temperature, and according to the calculation result, send control instructions to the electromagnetic valve 1 and the thermoelectric refrigerator 2 to control the temperature of the constant temperature object 5.

[0047] Embodiment 2

[0048] This embodiment provides a method for constant temperature liquid cooling of an airborne product by using the constant temperature liquid cooling system in embodiment 1, and the steps are as follows:

[0049] Step 1, set the target temperature of the constant temperature object 5 in the control module.

[0050] Step 2, the aircraft control system starts the cooling liquid circulation module, the temperature acquisition module acquires the temperature of the cooling liquid, the temperature of the constant temperature object 5 and the temperature of the high heat consumption device 6 in real time, and feeds back the collected information to the control module. The control module determines whether the constant temperature object 5 needs to be heated or cooled according to the requirement of the target temperature.

[0051] Step 3, the control module sends control signals to the electromagnetic valve 1 and the thermoelectric refrigerator 2 according to the determination result of step 2. The control module controls the stepper motor 15 to act, so that the motor rod 16 extends or retracts to regulate the flow of the cooling liquid out of the first outlet 12. The control module adjusts the voltage and current at both ends of the thermoelectric refrigerator 2 according to the difference between the measured temperature of the constant temperature object 5 and the target temperature. By adjusting the flow of the cooling liquid out of the first outlet 12 and adjusting the input current and voltage of the thermoelectric refrigerator 2, the temperature of the constant temperature object 5 is controlled until the constant temperature object 5 reaches the set target temperature.

[0052] Specifically, when the monitored temperature of the constant temperature object 5 is lower than the target temperature, it needs to be heated, the control module controls the stepper motor 15 to reduce the opening degree of the first outlet 12, reduces the flow of the cooling liquid out of the first outlet 12, i.e. reduces the heat dissipation capacity of the first liquid cooling plate 3 to the hot end of the thermoelectric refrigerator 2. Then, according to the difference between the target temperature, the voltage and current at both ends of the thermoelectric refrigerator 2 are adjusted, the refrigeration capacity of the thermoelectric refrigerator 2 is reduced, and the constant temperature object 5 is heated.

[0053] When the monitoring temperature of the constant temperature object 5 is higher than the target temperature, the refrigeration needs to be increased, the control module controls the stepper motor 15 to increase the opening degree of the first outlet 12, increases the flow of the cooling liquid flowing out of the first outlet 12, and accelerates the heat dissipation of the first liquid cooling plate 3 to the hot end of the thermoelectric refrigerator 2. Then, the voltage and current at both ends of the thermoelectric refrigerator 2 are adjusted according to the distance from the target temperature, the refrigeration capacity of the thermoelectric refrigerator 2 is improved, and the constant temperature object 5 is cooled. The adjustment of the input current and voltage of the thermoelectric refrigerator 2 is adjusted according to the cooling amplitude.

[0054] Step 4, the cooling liquid flowing out of the second outlet 13 of the electromagnetic valve flows through the second liquid cooling plate 4 to cool the high heat dissipation device 6. It should be noted that only the cooling liquid flowing into the first liquid cooling plate 3 through the first outlet 12 needs to be controlled, and the cooling liquid flowing into the second liquid cooling plate 4 through the second outlet 13 is sufficient to meet the heat dissipation needs of the high heat dissipation device 6.

[0055] The application reasonably utilizes the liquid cooling resources of the aircraft, proposes a controllable liquid cooling flow distribution system, and realizes the constant temperature control of the internal constant temperature object 5 of the airborne photoelectric product and the liquid cooling heat dissipation of the high heat dissipation device 6 according to the temperature change of the cooling liquid supplied on the aircraft, so as to ensure the normal work of the airborne photoelectric product.

[0056] Although the embodiments of the application have been shown and described above, it should be understood that the above-mentioned embodiments are exemplary and cannot be understood as limiting the application, and those skilled in the art can make changes, modifications, replacements and modifications to the above-mentioned embodiments without departing from the principles and purposes of the application within the scope of the application.

Claims

1. An airborne product constant temperature liquid cooling system, comprising a coolant circulation module, wherein the coolant circulation module is an aircraft-integrated coolant circulation system used to provide coolant; characterized in that, It also includes solenoid valves, thermoelectric coolers, a first liquid cooling plate, a second liquid cooling plate, a control module, and a temperature acquisition module; The solenoid valve is a three-way solenoid valve. Its inlet is connected to the coolant, and its first outlet is connected to the inlet of the first liquid-cooled plate via a pipeline. The outlet of the first liquid-cooled plate is connected to the coolant circulation module via a pipeline. The second outlet of the solenoid valve is connected to the inlet of the second liquid-cooled plate via a pipeline, and the outlet of the second liquid-cooled plate is connected to the coolant circulation module via a pipeline. The first liquid-cooled plate is installed on the hot end of the thermoelectric cooler to dissipate heat from the hot end. The cold end of the thermoelectric cooler is connected to a temperature-controlled object, and the thermoelectric cooler is used to control the temperature of the temperature-controlled object. The second liquid-cooled plate is installed on a high-heat-dissipation device to dissipate heat from the high-heat-dissipation device. The temperature acquisition module is used to acquire the temperature of the coolant, the temperature of the constant-temperature object, and the temperature of the high heat-consuming device, and feeds the acquired data back to the control module. The control module is electrically connected to the solenoid valve and the thermoelectric cooler, and is used to control the opening degree of the first outlet of the solenoid valve and the input current and voltage of the thermoelectric cooler. The control module sets a target temperature for the constant temperature object. After comparing the temperature data transmitted by the temperature acquisition module with the target temperature, the control module automatically adjusts the flow rate of the first outlet of the solenoid valve and the voltage and current of the thermoelectric cooler. The solenoid valve includes a valve seat and a stepper motor integrated into the valve seat; the valve seat has a through inlet, a first outlet and a second outlet; the stepper motor has a retractable motor rod located inside the valve seat, and the motor rod is driven to extend and retract by the stepper motor to adjust the opening degree of the first outlet, thereby adjusting the flow rate of coolant entering the first liquid cooling plate; the stepper motor is electrically connected to the control module and receives control commands from the control module.

2. The airborne product constant temperature liquid cooling system according to claim 1, characterized in that, The temperature acquisition module includes a first temperature sensor, a second temperature sensor, and a third temperature sensor. The first temperature sensor is installed at the inlet of the solenoid valve to monitor the temperature of the coolant entering the solenoid valve. The second temperature sensor is installed on the object requiring temperature control to monitor the temperature of the object. The third temperature sensor is installed on a high-heat-dissipation device to monitor the temperature of the high-heat-dissipation device. The three temperature sensors are electrically connected to the control module and transmit the monitored temperature to the control module for processing in real time.

3. The airborne product constant temperature liquid cooling system according to claim 1, characterized in that, The constant temperature liquid cooling system also includes a three-way connector, the first inlet of which is connected to the outlet of the first liquid cooling plate via a pipeline; the second inlet of which is connected to the outlet of the second liquid cooling plate via a pipeline; and the outlet of which is connected to the coolant circulation module via a pipeline.

4. The airborne product constant temperature liquid cooling system according to claim 1, characterized in that, The thermoelectric cooler is mounted on the constant temperature object via a structural gasket. The structural gasket is fixed above the constant temperature object and has a through-hole recess in its center. The shape of the recess matches the shape of the thermoelectric cooler. The thermoelectric cooler is embedded in the recess, with its cold end in contact with the constant temperature object for cooling it, and its hot end in contact with the first liquid cooling plate, where the heat is carried away by the coolant flowing through the first liquid cooling plate.

5. The airborne product constant temperature liquid cooling system according to claim 1, characterized in that, The solenoid valve is equipped with a regulating valve controller, which is installed in the control module and electrically connected to the control module; the stepper motor is electrically connected to the regulating valve controller and receives the working instructions from the control module through the regulating valve controller.

6. A method for constant-temperature liquid cooling of airborne products using the constant-temperature liquid cooling system described in claim 5, characterized in that, The steps are as follows: Step 1: Set the target temperature of the object to be kept at a constant temperature in the control module; Step 2: The aircraft control system activates the coolant circulation module, and the temperature acquisition module collects the coolant temperature, the temperature of the constant-temperature object, and the temperature of high heat-consuming components in real time, and feeds the collected information back to the control module. The control module determines whether the constant-temperature object needs to be heated or cooled based on the target temperature requirement. Step 3: The control module sends control signals to the solenoid valve and the thermoelectric cooler simultaneously based on the judgment result of Step 2; the control module controls the stepper motor to move, so that the motor rod extends and retracts to adjust the flow rate of the coolant flowing out of the first outlet; the control module adjusts the voltage and current across the thermoelectric cooler according to the difference between the measured temperature of the constant temperature object and the target temperature; until the constant temperature object reaches the set target temperature. Step 4: The coolant flowing out of the second outlet of the solenoid valve flows through the second liquid cooling plate to cool down the high heat-consuming components.

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