Radar cooling system and temperature control method based on condensation heat recycling

Abstract

The present application relates to the field of radar antenna array cooling, and specifically to a radar cooling system based on condensation heat recycling, along the cooling water flow direction, the antenna array, the cooling module, the gas-liquid separator and the water collecting tank are sequentially communicated to form a cooling water circulation pipeline, and a heating module for preheating the cooling water is arranged in the water collecting tank; the cooling module comprises a cooling water condenser and a plate evaporator arranged in parallel and selectively enabled; along the refrigerant flow direction, the plate evaporator, the compressor and the refrigerant condenser are sequentially communicated to form a refrigerant circulation pipeline; the refrigerant condenser and the cooling water condenser are both cooled by the cooling fan air cooling. The present application realizes the circulating cooling of the antenna array in different modes through the circulating cooling water, can accurately control the cooling temperature and has low heat dissipation power consumption. The present application also discloses a temperature control method of the radar cooling system based on condensation heat recycling.

Description

Technical Field

[0001] This invention relates to the field of radar antenna array cooling, specifically a radar cooling system and temperature control method based on the reuse of condensation heat. Background Technology

[0002] Currently, electronic component assembly technology is developing rapidly, with large-scale integrated circuits, functional integrated components, and system integrated components constantly emerging, prompting the widespread application of electronic equipment technology in various fields. Taking modern radar solid-state transmitters as an example, they integrate a large number of microwave integrated circuits (MMICs) and microwave solid-state components, and the heat load they generate has increased from several kilowatts to hundreds of kilowatts. When these solid-state transmitters installed in the radar antenna array are working, most of the input power becomes useless work, generated as heat; only a small portion becomes useful power to emit microwave energy. On the other hand, due to the development characteristics of solid-state transmitters in the antenna array, their packaging volume is shrinking exponentially, and their installation density is constantly increasing, which has led to complex problems such as a sharp increase in the heat flux density of electronic equipment. If this heat cannot be dissipated in time, it will directly affect the working stability, reliability, and service life of electronic equipment, and may even cause direct damage to the electronic equipment.

[0003] As described in publication number "CN116706494A", the existing antenna array is liquid-cooled by connecting the inlet and outlet liquid water pipe assembly to the inlet and outlet liquid distributor and fixing it to the antenna frame with a fixed bracket and clamping clamp. The flow of the liquid cooling plate device is distributed by adjusting the size of the opening of the liquid distributor, thereby cooling the antenna array. This conventional cooling method cannot achieve precise control of the antenna array temperature and has high power consumption for heat dissipation, so it is urgent to solve this problem. Summary of the Invention

[0004] To avoid and overcome the technical problems existing in the prior art, this invention provides a radar cooling system based on the reuse of condensation heat. This invention achieves cyclic cooling of the antenna array through circulating cooling water in different modes, enabling precise control of the cooling temperature and low power consumption. This invention also discloses a temperature control method for the radar cooling system based on the reuse of condensation heat.

[0005] To achieve the above objectives, the present invention provides the following technical solution:

[0006] A radar cooling system based on the reuse of condensation heat, wherein an antenna array, a cooling module, a gas-liquid separator, and a water collection tank are sequentially connected along the cooling water flow direction to form a cooling water circulation pipeline, and a heating module for preheating the cooling water is installed in the water collection tank; the cooling module includes a cooling water condenser arranged in parallel and one of which can be used at a time, and a plate evaporator.

[0007] Along the refrigerant flow direction, the plate evaporator, compressor, and refrigerant condenser are connected in sequence to form a refrigerant circulation pipeline; both the refrigerant condenser and the cooling water condenser are cooled by air cooling fans.

[0008] As a further aspect of the present invention: between the refrigerant outlet of the refrigerant condenser and the refrigerant inlet of the plate evaporator, a refrigerant receiver, a drying bottle, a sight glass, a solenoid valve, and an expansion valve are arranged sequentially along the refrigerant flow direction; a first compressor and a second compressor are installed in parallel between the refrigerant outlet of the plate evaporator and the refrigerant inlet of the refrigerant condenser.

[0009] As a further aspect of the present invention: at the outlets of the first compressor and the second compressor, a hot gas bypass pipeline is also provided that is directly connected to the refrigerant inlet of the plate evaporator, and a hot gas bypass solenoid valve is installed on the hot gas bypass pipeline.

[0010] As a further embodiment of the present invention: the cooling water outlet of the cooling water condenser is directly connected to the gas-liquid separator, or connected to the gas-liquid separator via a water storage tank, and an exhaust valve is installed on the water storage tank; the water storage tank is connected to the cooling water outlet of the cooling water condenser via a water pumping pipeline, and a water pumping solenoid valve and a water pump are installed on the water pumping pipeline; the water pumping pipeline is also connected to an external water source via a water supply shut-off valve to replenish water into the water storage tank; the water pumping pipeline is located at the lowest point of the radar cooling system; the water storage tank is connected to the gas-liquid separator via a water supply pipeline, and a water supply solenoid valve and a water supply pump are installed on the water supply pipeline.

[0011] As a further embodiment of the present invention: a shut-off valve, an expansion tank for buffering pressure fluctuations, and an active circulation pump and a standby circulation pump that are arranged in parallel and selectively activated are installed on the outlet pipe connecting the water collection tank and the antenna array. A check valve is installed at the outlet of both the active circulation pump and the standby circulation pump. A flow meter, a temperature sensor, and a pressure sensor are installed at the cooling water inlet of the antenna array.

[0012] As a further aspect of the present invention: a bypass pipeline connected to the inlet of the cooling water condenser is provided at the cooling water outlet of the plate evaporator, and a two-way regulating valve and a booster pump are arranged on the bypass pipeline.

[0013] As a further aspect of the present invention: air-cooled solenoid valves and refrigeration solenoid valves are respectively installed at the cooling water inlets of the cooling water condenser and the plate evaporator to selectively control the activation of the cooling water condenser and the plate evaporator.

[0014] As a further aspect of the present invention, a filter, a temperature sensor, and a pressure sensor are installed at the cooling water outlet of the antenna array.

[0015] A temperature control method for a radar cooling system based on the reuse of condensation heat includes the following steps:

[0016] S1. Measure the cooling water temperature. When the cooling water temperature is <-20℃, close the refrigeration solenoid valve and the cooling fan, open the air-cooled solenoid valve, and let the cooling water enter the circulation after passing through the cooling water condenser. Preheat the cooling water when it passes through the water collection tank until the cooling water temperature rises to 0° and then stop the preheating of the cooling water.

[0017] S2. Measure the ambient temperature;

[0018] S21. When the ambient temperature is ≤5℃, close the refrigeration solenoid valve, open the air-cooled solenoid valve and the cooling fan, so that the cooling water enters the circulation after passing through the cooling water condenser. When the cooling water passes through the cooling water condenser, it directly exchanges heat with the air introduced by the cooling fan, thereby reducing the cooling water temperature through air cooling.

[0019] S22. When the ambient temperature is >5℃, open the refrigeration solenoid valve and the plate evaporator, and close the air-cooled solenoid valve to allow the cooling water to enter the circulation after passing through the plate evaporator. The cooling water will exchange heat and cool down after passing through the plate evaporator.

[0020] As a further aspect of the present invention: in step S21, the speed of the cooling fan is adjusted by PID to control the heat exchange between air and cooling water, thereby ensuring that the cooling water temperature is maintained within the set range.

[0021] In step S22, the set temperature of the cooling water is t. r After the system starts up, monitor the cooling water temperature t;

[0022] S221, When t≤t r At that time, both the first compressor and the second compressor were in standby mode;

[0023] S222, when t r <t≤t r At +2℃, one of the first and second compressors is in operation, while the other compressor is in standby mode.

[0024] S223, When t≥t r At +2℃, both the first compressor and the second compressor are in operation;

[0025] S224. If the cooling water temperature is rising, when t = t r At time t = t, one of the first and second compressors is in operation, while the other compressor is in standby mode; when t = t r At +2℃, both the first compressor and the second compressor are in operation;

[0026] If the cooling water temperature is decreasing, when t = t r At time t = t, one of the first and second compressors is in operation, while the other compressor is in standby mode; when t = t r At -2℃, both the first and second compressors stop operating.

[0027] Compared with the prior art, the beneficial effects of the present invention are:

[0028] 1. This invention selectively cools the cooling water of the antenna array by air cooling or refrigerant cooling at different temperatures. By using the condensation heat reuse technology, it creates a good working environment for electronic equipment in the closed environment of the antenna array, ensuring that heat-generating components, parts and systems can operate stably and reliably at the allowable temperature. It can precisely control the cooling temperature and has low power consumption for heat dissipation.

[0029] 2. The outdoor unit of this invention generates cooling capacity by using two compressors connected in parallel, and the indoor unit uses two circulating pumps as backups to provide circulating power for the cooling water. When the cooling capacity of the refrigeration compressor is too large, the hot gas bypass solenoid valve opens, and part of the refrigerant hot gas bypasses into the plate evaporator to offset part of the cooling capacity and avoid excessive cooling capacity.

[0030] 3. This invention reuses condensation heat through PID control, and the addition of a water storage tank facilitates system maintenance and water replenishment. Attached Figure Description

[0031] Figure 1 This is a schematic diagram of the cooling system principle of the present invention.

[0032] Figure 2 This is an isometric view of the cooling system of the present invention.

[0033] Figure 3 This is a schematic diagram of the PID control adjustment of the cooling system in this invention.

[0034] In the picture:

[0035] 1. Antenna array; 2. Cooling water circulation piping;

[0036] 21. Filter; 22. Air-cooled solenoid valve; 23. Refrigeration solenoid valve;

[0037] 24. Two-way regulating valve; 25. Booster pump; 26. Gas-liquid separator;

[0038] 3. Refrigerant circulation piping; 31. Refrigerant receiver; 32. Dryer bottle; 33. Sight glass;

[0039] 341. First solenoid valve; 342. Second solenoid valve; 343. Expansion valve;

[0040] 351. First compressor; 352. Second compressor; 36. Hot gas bypass solenoid valve;

[0041] 4. Plate evaporator; 5. Refrigerant condenser; 6. Cooling water condenser; 7. Cooling fan;

[0042] 8. Water storage tank; 81. Water pumping solenoid valve; 82. Water supply shut-off valve; 83. Water pump;

[0043] 84. Water supply pump; 85. Water supply solenoid valve; 86. Air vent valve;

[0044] 9. Water collection tank; 91. Shut-off valve; 92. Expansion tank; 93. Active circulation pump;

[0045] 94. Standby circulating pump; 95. Check valve; 96. Flow meter. Detailed Implementation

[0046] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0047] Please see Figures 1-3 In this embodiment of the invention, a radar cooling system based on the reuse of condensation heat is provided. This radar cooling system uses an electronic shelter as the installation platform, and the cooling system directly supplies and returns cooling water to the antenna array. The cooling system consists of an indoor unit and an outdoor unit. The indoor unit is installed inside the electronic shelter and primarily provides circulation power for the cooling water. The outdoor unit is wall-mounted outside the electronic shelter, using side and bottom air intakes and a cooling fan 7 to discharge the heat generated by the electronic equipment into the atmosphere.

[0048] Along the direction of cooling water flow, the antenna array 1, cooling module, gas-liquid separator 26, and water collection tank 9 are connected in sequence to form a cooling water circulation pipeline 2. A filter 21 is installed at the cooling water outlet of the antenna array 1 to filter impurities in the cooling water. A temperature sensor and a pressure sensor are also installed at the cooling water outlet of the antenna array 1.

[0049] The cooling water outlet pipe of antenna array 1 is split and connected to cooling water condenser 6 and plate evaporator 4 respectively. Cooling water condenser 6 and plate evaporator 4 are both cooling modules, arranged in parallel and selectively activated. Air-cooled solenoid valve 22 and refrigeration solenoid valve 23 are respectively installed at the inlet of cooling water condenser 6 and plate evaporator 4 to control their opening and closing. The cooling water outlet pipes of cooling water condenser 6 and plate evaporator 4 converge and are connected to gas-liquid separator 26. Temperature sensors are installed at the cooling water outlets of both cooling water condenser 6 and plate evaporator 4.

[0050] Along the refrigerant flow direction, the plate evaporator 4, compressor, and refrigerant condenser 5 are sequentially connected to form the refrigerant circulation pipeline 3. The compressor includes a first compressor 351 and a second compressor 352 arranged in parallel. The outlets of the first compressor 351 and the second compressor 352 are also branched to form a hot gas bypass pipeline, which is directly connected to the refrigerant inlet of the plate evaporator 4. A hot gas bypass solenoid valve 36 is installed on the hot gas bypass pipeline. When the cooling capacity of the compressor is too high, the hot gas bypass solenoid valve 36 opens, and a portion of the refrigerant hot gas bypasses into the plate evaporator 4 to offset part of the cooling capacity and prevent excessive cooling.

[0051] Between the refrigerant outlet of the refrigerant condenser 5 and the refrigerant outlet of the plate evaporator 4, a refrigerant receiver 31, a dryer 32, a sight glass 33, a solenoid valve, and an expansion valve 343 are arranged sequentially along the refrigerant flow direction. The solenoid valve includes a first solenoid valve 341 and a second solenoid valve 342 arranged in parallel, and a corresponding expansion valve 343 is arranged downstream of both the first solenoid valve 341 and the second solenoid valve 342.

[0052] The refrigerant condenser 5 and the cooling water condenser 6 are installed at the cooling fan 7 of the radar vehicle. The cooling fan 7 can selectively provide air cooling for either the refrigerant condenser 5 or the cooling water condenser 6. A bypass pipe connecting the cooling water outlet of the plate evaporator 4 to the inlet of the cooling water condenser 6 is installed on the bypass pipe. A two-way regulating valve 24 and a booster pump 25 are arranged on the bypass pipe. The low-temperature cooling water flowing out of the plate evaporator 4, which is below the set temperature, flows through the two-way regulating valve 24 and then through the booster pump 25 into the cooling water condenser, where it exchanges heat with the high-temperature air and becomes high-temperature cooling water. At this time, the bypassed high-temperature cooling water flows back through the pipe and mixes with the non-bypassed low-temperature cooling water flowing out of the plate evaporator, is heated, and then discharged into the water collection tank 9. Because there is a bypass in the cooling water, the flow rate of the bypass cooling water is variable, and the water pressure in the cooling water condenser also changes accordingly, resulting in a negative pressure situation. Therefore, a gas-liquid separator was added. One reason is to remove air from the cooling water system, and the other is to allow the water from the plate evaporator 4 and the high-temperature cooling water that is heated again by the condensation heat to be mixed and used in the gas-liquid separator.

[0053] When regulating water flow, the inlet and outlet water pressures and flow rates of the two-way regulating valve 24 change. Given the main parameters and resistance of the cooling water condenser, it is necessary to calculate the pressure change dp at the valve orifice of the two-way regulating valve 24 and the flow rate Q of the two-way regulating valve 24:

[0054]

[0055] Where: Q is the water flow rate of the two-way regulating valve 24;

[0056] A represents the flow area of ​​the two-way regulating valve 24;

[0057] ε is the resistance coefficient of the two-way regulating valve 24, which is a constant;

[0058] v is the average flow velocity of the cooling water;

[0059] ρ is the density of the cooling water;

[0060] p1 and p2 are the inlet and outlet pressures of the two-way regulating valve 24.

[0061]

[0062] Where: dp represents the pressure change of the two-way regulating valve 24;

[0063] β e For the elastic model of cooling water, MPa;

[0064] V is the volume of the cavity of the two-way regulating valve 24;

[0065] ω is the regulating angular velocity of the two-way regulating valve 24;

[0066] θ is the rotation angle of the valve stem of the two-way control valve 24.

[0067] To offset excess cooling capacity in the refrigeration system and ensure that the supply water temperature meets requirements in real time, the cooling system employs PID control technology. Temperature sensors at the outlets of the refrigerant condenser 5 and the cooling water condenser 6 serve as inputs, along with the flow and pressure characteristics of the two-way regulating valve 24. The proportional change Δkp and derivative change Δk of the PID control are used to control these parameters. d Integral change Δk i As an output signal, it ensures the control accuracy of the two-way regulating valve 24 and the stability of the water supply temperature.

[0068] like Figure 3 As shown, e represents the deviation of the PID input signal, and ec represents the rate of change of the deviation. During PID operation, the changes in e and ec need to be fuzzified in real time to output the corrected change amount corresponding to the three output signals of the PID.

[0069] The output result is:

[0070]

[0071] In the formula, K p1 K i1 K d1 These are the original values ​​of the three output signals of the PID controller.

[0072] An electric heating module is installed inside the water collection tank 9 to preheat the cooling water to a set temperature. Between the cooling water outlet of the water collection tank 9 and the cooling water inlet of the antenna array 1, along the cooling water flow direction, a shut-off valve 91, an expansion tank 92 for buffering pressure fluctuations, a circulation pump, a flow meter, a temperature sensor, and a pressure sensor are installed in sequence. The circulation pump includes a primary circulation pump 93 arranged in parallel and selectively started, and a standby circulation pump 94. A check valve 95 is installed at the outlet of both the primary circulation pump 93 and the standby circulation pump 94.

[0073] To facilitate water replenishment and drainage, the cooling water outlet of the cooling water condenser 6 is branched off and connected to the water storage tank 8, which is equipped with an air vent valve 86. The water storage tank 8 is connected to the cooling water outlet of the cooling water condenser 6 via a pumping pipeline. This pipeline is equipped with a pumping solenoid valve 81 and a pump 83, and also connects to an external water source via a water supply shut-off valve 82 to replenish water to the storage tank 8. The pumping pipeline is positioned at the lowest point of the radar cooling system. The storage tank 8 is connected to the gas-liquid separator 26 via a replenishment pipeline, which is equipped with a replenishment solenoid valve 85 and a replenishment pump 84. When the cooling system requires maintenance, the cooling water in the pipeline is recovered via the pumping solenoid valve 81 and the pump 83. During cooling system installation, bottled cooling water (ethylene glycol antifreeze) is added to the storage tank 8.

[0074] The temperature control method for this radar cooling system includes the following steps:

[0075] S1. Measure the cooling water temperature. When the cooling water temperature is <-20℃, close the refrigeration solenoid valve 23 and the cooling fan 7, and open the air-cooled solenoid valve 22 to allow the cooling water to enter the circulation after passing through the cooling water condenser 6. Preheat the cooling water when it passes through the water collection tank 9 until the cooling water temperature rises to 0° and the preheating of the cooling water is stopped.

[0076] S2. Measure the ambient temperature;

[0077] S21. When the ambient temperature is ≤5℃, close the refrigeration solenoid valve 23, open the air-cooled solenoid valve 22 and the cooling fan 7, so that the cooling water enters the circulation after passing through the cooling water condenser 6. When the cooling water passes through the cooling water condenser 6, it directly exchanges heat with the air introduced by the cooling fan 7, thereby reducing the cooling water temperature through air cooling.

[0078] In step S21, the speed of the cooling fan 7 is adjusted by PID control to control the heat exchange between air and cooling water, thereby ensuring that the cooling water temperature is maintained within the set range.

[0079] S22. When the ambient temperature is >5℃, open the refrigeration solenoid valve 23 and the plate evaporator 4, and close the air-cooled solenoid valve 22, so that the cooling water enters the circulation after passing through the plate evaporator 4, and the cooling water exchanges heat and cools down after passing through the plate evaporator 4.

[0080] In step S22, the set temperature of the cooling water is t. r After the system starts up, monitor the cooling water temperature t;

[0081] S221, When t≤t r At this time, both the first compressor 351 and the second compressor 352 are in standby mode;

[0082] S222, when t r <t≤t r At +2℃, one of the compressors, the first compressor 351 and the second compressor 352, is put into operation, while the other compressor is in standby mode.

[0083] S223, When t≥t r At +2℃, both the first compressor 351 and the second compressor 352 are in operation.

[0084] S224. If the cooling water temperature is rising, when t = t r At time t = t, one of the first compressor 351 and the second compressor 352 is in operation, while the other compressor is in standby mode; when t = t r At +2℃, both the first compressor 351 and the second compressor 352 are in operation.

[0085] If the cooling water temperature is decreasing, when t = t r At time t = t, one of the first compressor 351 and the second compressor 352 is in operation, while the other compressor is in standby mode; when t = t r At -2℃, both the first compressor 351 and the second compressor 352 stop operating.

[0086] When the compressor is running in refrigeration mode, the condensing pressure is mainly controlled in real time by a PID controller. The control system monitors the condensing pressure in real time. If the condensing pressure is lower than the program set value, the speed of the cooling fan 7 is reduced to decrease the heat exchange between the air and the refrigerant gas, ultimately reducing the cooling capacity of the refrigeration system. If the condensing pressure is higher than the program set value, the speed of the cooling fan 7 is increased to increase the heat exchange between the air and the refrigerant gas, ultimately increasing the cooling capacity of the refrigeration system and ensuring that the liquid supply temperature remains within the set range.

[0087] The basic principles of this application have been described above with reference to specific embodiments. However, it should be noted that the advantages, benefits, and effects mentioned in this application are merely examples and not limitations, and should not be considered as essential features of each embodiment of this application. Furthermore, the specific details disclosed above are for illustrative and facilitative purposes only, and are not limitations. These details do not limit the application to the necessity of employing the aforementioned specific details for implementation.

[0088] The block diagrams of devices, apparatuses, devices, and systems involved in this application are merely illustrative examples and are not intended to require or imply that they must be connected, arranged, or configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, devices, and systems can be connected, arranged, and configured in any manner. Words such as “comprising,” “including,” “having,” etc., are open-ended terms meaning “including but not limited to,” and are used interchangeably with them. The terms “or” and “and” as used herein refer to the terms “and / or,” and are used interchangeably with them unless the context clearly indicates otherwise. The term “such as” as used herein refers to the phrase “such as but not limited to,” and is used interchangeably with it.

Claims

1. A radar cooling system based on the reuse of condensation heat, characterized in that, Along the direction of cooling water flow, the antenna array (1), cooling module, gas-liquid separator (26), and water collection tank (9) are connected in sequence to form a cooling water circulation pipeline (2). The water collection tank (9) is equipped with a heating module for preheating the cooling water. The cooling module includes a cooling water condenser (6) arranged in parallel and one of which is activated, and a plate evaporator (4). Along the refrigerant flow direction, the plate evaporator (4), compressor, and refrigerant condenser (5) are connected in sequence to form a refrigerant circulation pipeline (3); the refrigerant condenser (5) and the cooling water condenser (6) are all cooled by air by a cooling fan (7); A bypass pipe is provided at the cooling water outlet of the plate evaporator (4) and connected to the inlet of the cooling water condenser (6). A two-way regulating valve (24) and a booster pump (25) are arranged on the bypass pipe. The low-temperature cooling water flowing out of the plate evaporator (4) at a temperature lower than the set temperature flows through the two-way regulating valve (24) and through the booster pump (25) into the cooling water condenser (6), where it exchanges heat with the high-temperature air and becomes high-temperature cooling water; the bypassed high-temperature cooling water flows back through the pipeline and mixes with the non-bypassed low-temperature cooling water flowing out of the plate evaporator (4) to raise the temperature before being discharged into the water collection tank (9); Based on the main parameters and resistance of the cooling water condenser, the pressure change at the valve port of the two-way regulating valve (24) is analyzed. dp and the flow rate of the two-way regulating valve (24) Q Perform the calculation: in: Q The water flow rate of the two-way regulating valve (24); A The flow area of ​​the two-way regulating valve (24); The resistance coefficient of the two-way regulating valve (24) is a constant; v The average flow rate of the cooling water; The density of the cooling water; p 1 、p 2 The inlet and outlet pressures of the two-way regulating valve (24); in: For the pressure change of the two-way regulating valve (24); For the elastic model of cooling water, MPa; V The volume of the cavity of the two-way regulating valve (24); The regulating angular velocity of the two-way regulating valve (24); The angle of rotation of the valve stem of the two-way regulating valve (24); The cooling system employs PID control, using temperature sensor signals from the outlets of the refrigerant condenser (5) and the cooling water condenser (6), as well as the flow and pressure characteristics of the two-way regulating valve (24), as inputs to adjust the proportional gain of the PID control. Differential changes Integral changes As an output signal, it ensures the control accuracy of the two-way regulating valve (24) and the stability of the water supply temperature.

2. The radar cooling system based on the reuse of condensation heat according to claim 1, characterized in that, Between the refrigerant outlet of the refrigerant condenser (5) and the refrigerant inlet of the plate evaporator (4), a refrigerant receiver (31), a dryer (32), a sight glass (33), a solenoid valve and an expansion valve (343) are arranged sequentially along the refrigerant flow direction; between the refrigerant outlet of the plate evaporator (4) and the refrigerant inlet of the refrigerant condenser (5), a first compressor (351) and a second compressor (352) are installed in parallel.

3. A radar cooling system based on the reuse of condensation heat according to claim 2, characterized in that, At the outlets of the first compressor (351) and the second compressor (352), a hot gas bypass pipeline is also provided that is directly connected to the refrigerant inlet of the plate evaporator (4), and a hot gas bypass solenoid valve (36) is installed on the hot gas bypass pipeline.

4. A radar cooling system based on the reuse of condensation heat according to claim 1, characterized in that, The cooling water outlet of the cooling water condenser (6) is directly connected to the gas-liquid separator (26), or connected to the gas-liquid separator (26) through the water storage tank (8). An exhaust valve (86) is installed on the water storage tank (8). The water storage tank (8) is connected to the cooling water outlet of the cooling water condenser (6) through a water pumping pipeline. A water pumping solenoid valve (81) and a water pump (83) are installed on the water pumping pipeline. The water pumping pipeline is also connected to an external water source through a water supply shut-off valve (82) to replenish water into the water storage tank (8). The water pumping pipeline is located at the lowest point of the radar cooling system. The water storage tank (8) is connected to the gas-liquid separator (26) through a water supply pipeline. A water supply solenoid valve (85) and a water supply pump (84) are installed on the water supply pipeline.

5. A radar cooling system based on the reuse of condensation heat according to claim 4, characterized in that, A shut-off valve (91), an expansion tank (92) for buffering pressure fluctuations, and a standby circulation pump (94) are installed on the outlet pipe connecting the water collection tank (9) and the antenna array (1). A check valve (95) is installed at the outlet of both the active circulation pump (93) and the standby circulation pump (94). A flow meter (96), a temperature sensor, and a pressure sensor are installed at the cooling water inlet of the antenna array (1).

6. A radar cooling system based on the reuse of condensation heat according to any one of claims 1 to 5, characterized in that, Air-cooled solenoid valve (22) and refrigeration solenoid valve (23) are installed at the cooling water inlet of the cooling water condenser (6) and the plate evaporator (4) respectively, so as to selectively control the activation of the cooling water condenser (6) and the plate evaporator (4).

7. A radar cooling system based on the reuse of condensation heat according to any one of claims 1 to 5, characterized in that, A filter (21), a temperature sensor, and a pressure sensor are installed at the cooling water outlet of the antenna array (1).

8. A temperature control method for a radar cooling system based on the reuse of condensation heat according to any one of claims 1 to 5, characterized in that, The steps include the following: S1. Measure the cooling water temperature. When the cooling water temperature is <-20 ℃, close the refrigeration solenoid valve (23) and the cooling fan (7), open the air-cooled solenoid valve (22), and let the cooling water enter the circulation after passing through the cooling water condenser (6). When the cooling water passes through the water collection tank (9), preheat the cooling water until the cooling water temperature rises to 0° and stop the preheating of the cooling water. S2. Measure the ambient temperature; S21. When the ambient temperature is ≤5℃, close the refrigeration solenoid valve (23), open the air-cooled solenoid valve (22) and the cooling fan (7), so that the cooling water enters the circulation after passing through the cooling water condenser (6). When the cooling water passes through the cooling water condenser (6), it directly exchanges heat with the air introduced by the cooling fan (7), thereby reducing the temperature of the cooling water by air cooling. S22. When the ambient temperature is >5 ℃, open the refrigeration solenoid valve (23) and the plate evaporator (4), close the air-cooled solenoid valve (22), so that the cooling water enters the circulation after passing through the plate evaporator (4), and the cooling water exchanges heat and cools down after passing through the plate evaporator (4).

9. The temperature control method for a radar cooling system based on the reuse of condensation heat according to claim 8, characterized in that, In step S21, the speed of the cooling fan (7) is adjusted by PID to control the heat exchange between air and cooling water, thereby ensuring that the cooling water temperature is maintained within the set range. In step S22, the set temperature of the cooling water is used as... t r After the system starts up, monitor the cooling water temperature. t ; S221, when t≤t r At this time, both the first compressor (351) and the second compressor (352) are in standby mode; S222, when t r < t≤t r + At 2℃, one of the first compressor (351) and the second compressor (352) is put into operation, while the other compressor is in standby mode; S223, when t≥t r + At 2℃, both the first compressor (351) and the second compressor (352) are in operation; S224. If the cooling water temperature is rising, when t = t r At that time, one of the first compressor (351) and the second compressor (352) is in operation, while the other compressor is in standby mode; when t = t r + At 2℃, both the first compressor (351) and the second compressor (352) are in operation; If the cooling water temperature is in the process of decreasing, when t = t r At that time, one of the first compressor (351) and the second compressor (352) is in operation, while the other compressor is in standby mode; when t = t r At -2℃, both the first compressor (351) and the second compressor (352) stop operating.

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