Airborne liquid cooling system

Abstract

The invention relates to an airborne liquid cooling system which comprises a cold plate, a controller, an electric valve, a heat exchanger, an expansion box, a liquid cooling pump and a temperature sensor, the cold plate is arranged in an airborne pod, a liquid outlet of the cold plate is provided with two pipelines communicated to a liquid inlet of the expansion box, one pipeline is sequentially provided with the electric valve and the heat exchanger, and the other pipeline is provided with the liquid cooling pump. A liquid outlet of the expansion box is communicated to a liquid inlet of the cold plate through the liquid cooling pump, the temperature sensor is arranged at a liquid outlet of the liquid cooling pump, the controller controls the flow of the electrically operated valve through a temperature signal collected by the temperature sensor, a heating module is further arranged in the expansion box, and when the temperature signal collected by the temperature sensor is reduced to a set value, the heating module is switched on. And the controller controls the heating module to start. According to the invention, the temperature of the cooling medium can be better controlled within a very small range so as to meet the requirements of the airborne laser pod.

Description

Technical Field

[0001] The invention belongs to the technical field of airborne pods, and in particular relates to an airborne liquid cooling system. Background Art

[0002] The liquid cooling system is a key component of the airborne pod system. Its main function is to draw air when the aircraft is flying. When the low-temperature air flows through the heat exchanger, it exchanges heat with the cooling medium on the hot side of the heat exchanger. The cooling medium lowers its temperature and then flows into the system, taking away the heat from the system's electronic equipment, forming a closed-loop cycle and keeping the ambient temperature of the equipment within the allowable range, thereby ensuring the normal operation of the equipment and achieving the mission of the airborne pod system.

[0003] When performing a mission, the aircraft's flight altitude and flight speed vary within a certain range, causing the temperature of the cooling medium to vary within a larger range.

[0004] Traditional liquid cooling systems are mostly electronic pods, where electronic equipment has relatively loose requirements for the temperature of the cooling medium, and there is no need to adjust the temperature of the cooling medium in real time. However, in the airborne laser pod being studied, the temperature of the electronic equipment has a greater impact on the performance of the laser, and the cooling medium temperature must be kept in a very small range to ensure the performance of the laser. Summary of the invention

[0005] In view of this, the purpose of the present invention is to provide an airborne liquid cooling system to address the deficiencies of the prior art, so as to keep the temperature of the cooling medium within a very small range and ensure the performance of the laser.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] An airborne liquid cooling system comprises a cold plate, a controller, an electric valve, a heat exchanger, an expansion tank, a liquid cooling pump and a temperature sensor. The cold plate is arranged in an airborne pod. Two pipelines connected to a liquid inlet of the expansion tank are arranged at the liquid outlet of the cold plate. An electric valve and a heat exchanger are arranged in sequence on one of the pipelines. The liquid outlet of the expansion tank is connected to the liquid inlet of the cold plate through a liquid cooling pump. The temperature sensor is arranged at the liquid outlet of the liquid cooling pump. The controller controls the flow rate of the electric valve through a temperature signal collected by the temperature sensor. The expansion tank also has a built-in heating module. When the temperature signal collected by the temperature sensor drops to a set value, the controller controls the heating module to start.

[0008] In order to better realize the present invention, further optimization is made in the above structure. The liquid cooling pump is a rotary vane pump driven by a shielded motor. The stator assembly and the rotor assembly are shielded into two chambers inside the shielded motor by arranging a shielding sleeve and a sealing ring, and a cooling channel is formed between the two chambers. The cooling channel enters the shielded motor from the pump shaft of the rotary vane pump and reaches the liquid inlet of the rotary vane pump through the hollow motor shaft of the shielded motor.

[0009] In order to better implement the present invention, further optimization is made in the above structure, and a pressure sensor is provided at the liquid outlet of the liquid cooling pump.

[0010] In order to better implement the present invention, further optimization is made in the above structure, and an overflow valve and a one-way valve are further provided at the liquid outlet of the liquid cooling pump.

[0011] In order to better implement the present invention, further optimization is made in the above structure, and a filter component is further provided at the liquid outlet of the liquid cooling pump.

[0012] In order to better implement the present invention, further optimization is made in the above structure, and a ground liquid inlet and a ground liquid outlet are further provided on the liquid cooling pump.

[0013] In order to better realize the present invention, further optimization is made in the above structure, and the electric valve is a ball valve driven by an electric mechanism.

[0014] In order to better realize the present invention, further optimization is made in the above structure, the electric mechanism is a servo motor, and the servo motor is provided with a Hall sensor.

[0015] In order to better realize the present invention, further optimization is made in the above structure. The expansion tank includes a cylinder, a liquid level sensor arranged in the cylinder and end covers arranged on both sides of the cylinder. The end covers are provided with an observation cover, a liquid inlet, a liquid outlet, an air release valve and a heater.

[0016] In order to better implement the present invention, further optimization is made in the above structure, and front and rear wind shields are provided on the heat exchanger.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] 1. When the airborne liquid cooling system provided by the present invention is working, a part of the cooling medium output by the cold plate enters the heat exchanger after being diverted, and enters the expansion tank after heat exchange with cold air in the heat exchanger, and the other part directly enters the expansion tank. The controller converts the collected temperature value into the opening value of the temperature control component, and controls the opening of the electric valve by the controller to reach the converted opening value, thereby controlling the flow entering the heat exchanger. Due to the use of diversion temperature control, only part of the cooling medium participates in the heat exchange, and the influence coefficient on the cooling medium temperature in the entire pipeline is small, so that the temperature of the cooling medium can be better controlled within a very small range to meet the needs of the airborne laser pod.

[0019] 2. The present invention also adopts a shielded motor, eliminates the leather cup between the pump and the motor, and introduces the coolant into the shielded motor, eliminating the risk of damage to the motor due to leakage of the leather cup; the pump body adopts a rotary vane pump, and the flow rate of the cooling medium can be adjusted by adjusting the rotation speed of the rotary vane pump; the coolant circulates in the shielded motor to cool the shielded motor, which can reduce the volume of the shielded motor; the control part and the electric pump are integrated into an integrated design, saving the connecting cable between the control part and the electric pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0021] Figure 1 is a schematic diagram of the layout of the airborne liquid cooling system of the present invention;

[0022] Figure 2 It is a structural schematic diagram of the airborne liquid cooling system of the present invention;

[0023] Figure 3 It is a structural schematic diagram of the electric valve in the present invention;

[0024] Figure 4 It is a structural schematic diagram of the heat exchanger in the present invention;

[0025] Figure 5 It is a structural schematic diagram of the expansion tank in the present invention;

[0026] Figure 6 It is a schematic diagram of the structure of the liquid cooling pump and related valves and sensors in the present invention;

[0027] Figure 7 is a cross-sectional view of the liquid cooling pump of the present invention;

[0028] Figure 8 It is a circuit schematic diagram of the controller in the present invention.

[0029] In the figure:

[0030] 1-cold plate, 2-controller, 3-electric valve, 301-electric mechanism, 302-ball valve, 4-heat exchanger, 401-front and rear wind shields, 5-expansion tank, 501-cylinder, 502-liquid level sensor, 503-end cover, 504-observation cover, 505-air release valve, 506-heater, 6-liquid cooling pump, 601-shielded motor, 6011-shielded sleeve, 6012-sealing ring, 602-rotary vane pump, 7-temperature sensor, 8-pressure sensor, 9-overflow valve, 10-check valve, 11-differential pressure sensor, 12-filter assembly, 13-ground liquid inlet, 14-ground liquid outlet. DETAILED DESCRIPTION

[0031] To make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be described in detail below. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other implementation methods obtained by ordinary technicians in this field without creative work belong to the scope of protection of the present invention.

[0032] In the description of the present invention, it should be noted that, unless otherwise specified, the meaning of "plurality" is two or more; the orientations or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", "front end", "rear end", "head", "tail", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive purposes and cannot be understood as indicating or implying relative importance.

[0033] In the description of the present invention, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "installation", "connection", and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0034] Please refer to Figure 1-Figure 8 The airborne liquid cooling system provided by the present invention comprises a cold plate 1, a controller 2, an electric valve 3, a heat exchanger 4, an expansion tank 5, a liquid cooling pump 6 and a temperature sensor 7. The cold plate 1 is arranged in the airborne pod, and the liquid outlet of the cold plate 1 is provided with two pipelines connected to the liquid inlet of the expansion tank 5, and the electric valve 3 and the heat exchanger 4 are arranged in sequence on one of the pipelines. Figure 4, the heat exchanger 4 is provided with front and rear wind shields 401; see Figure 3 The electric valve 3 is a ball valve 302 driven by an electric mechanism 301. The electric mechanism 301 is a servo motor, and a Hall sensor is provided on the servo motor.

[0035] See Figure 5 The expansion tank 5 includes a cylinder 501, a liquid level sensor 502 arranged in the cylinder 501 and end covers 503 arranged on both sides of the cylinder 501. The end covers 503 are provided with an observation cover 504, a liquid inlet, a liquid outlet, a vent valve 505 and a heater 506. The liquid outlet of the expansion tank 5 is connected to the liquid inlet of the cold plate 1 through the liquid cooling pump 6, and the temperature sensor 7 is arranged at the liquid outlet of the liquid cooling pump 6. A pressure sensor 8, a relief valve 9 and a one-way valve 10 are arranged at the liquid outlet of the liquid cooling pump 6. The safety relief valve can ensure that the pressure after the pump is not greater than 1MPa. A pressure difference sensor 11 is arranged at both ends of the liquid inlet and the liquid outlet of the liquid cooling pump 6. A filter assembly 12 is also arranged at the liquid outlet of the liquid cooling pump 6. The liquid cooling pump 6 is also provided with a ground liquid inlet 13 and a ground liquid outlet 14.

[0036] The controller 2 controls the flow rate of the electric valve 3 through the temperature signal collected by the temperature sensor 7. Figure 8 The controller 2 in the liquid cooling system of the present invention adopts a 270VDC single-channel power supply, digital control technology, and a full-bridge drive circuit. It adopts a control strategy that uses a Hall sensor to collect motor speed information, completes the speed closed loop of the servo motor in the electric valve 3, and simultaneously detects signals such as current, voltage, motor temperature, and IPM temperature. It monitors faults and protects the controller through corresponding fault processing logic, collects feedback values ​​from liquid level, pressure, temperature, and pressure difference sensors, feeds back the collected values ​​to the host, and performs temperature closed loop in real time.

[0037] The present application also has a built-in heating module in the expansion box 5 to heat the system under conditions where the compressed air and ambient temperature are very low to maintain the temperature within a set range. When the temperature signal collected by the temperature sensor 7 drops to a set value, the controller 2 controls the heating module to start, ensuring that the temperature in the system can be maintained within a given range.

[0038] The principle of the airborne liquid cooling system of the present invention is:

[0039] After receiving the start signal from the host computer, the controller 2 supplies power to the electric liquid cooling pump 6;

[0040] After the cooling medium outputted from the cold plate 1 is divided, a part enters the heat exchanger 4 through the electric valve 3, and then enters the expansion tank 5 after heat exchange with the cold air through the heat exchanger 4; the other part directly enters the expansion tank 5;

[0041] The mixed cooling medium of the two paths is pressurized by the liquid cooling pump 6 and filtered by the filter assembly 12 before entering the cold plate 1 . After the cold plate 1 performs heat exchange on the electronic components, it enters the next cycle.

[0042] The controller 2 adjusts the valve of the ball valve 302 in real time according to the feedback signal of the detected temperature sensor 7 to control the flow rate of the cooling medium entering the heat exchanger 4. One path enters the heat exchanger 4 to exchange heat with the air for cooling, and the other path does not flow through the heat exchanger 4. The two paths of cooling medium are mixed after the outlet of the heat exchanger 4.

[0043] When the present application is working, a part of the cooling medium output by the cold plate 1 enters the heat exchanger 4 after being diverted, and enters the expansion tank 5 after heat exchange with the cold air in the heat exchanger 4, and the other part directly enters the expansion tank 5. The controller 2 converts the temperature value collected by the temperature sensor 7 into the opening value of the temperature control component, and the controller 2 controls the opening of the electric valve 3 to reach the converted opening value, thereby controlling the flow entering the heat exchanger 4. Since the present system adopts diversion temperature control, only part of the cooling medium participates in the heat exchange, and the influence coefficient on the cooling medium temperature in the entire pipeline is small, so that the temperature of the cooling medium can be better controlled within a very small range to meet the needs of the airborne laser pod.

[0044] See Figure 6 and Figure 7 The liquid cooling pump 6 is a rotary vane pump 602 driven by a shielded motor 601, which provides a cooling medium with a certain flow rate and pressure for the thermal control system. The pump body adopts a rotary vane pump 602, and the flow rate of the cooling medium can be adjusted by adjusting the rotation speed of the rotary vane pump 602. The stator assembly and the rotor assembly are shielded into two chambers by setting a shielding sleeve 6011 and a sealing ring 6012 inside the shielded motor 601, and a cooling channel is formed between the two chambers. The cooling channel enters the shielded motor 601 from the pump shaft of the rotary vane pump 602, and reaches the liquid inlet of the rotary vane pump 602 through the hollow motor shaft of the shielded motor 601.

[0045] In this embodiment, the liquid cooling pump 6 uses a shielded motor 601, the leather cup between the pump and the motor is removed, and the coolant is introduced into the shielded motor 601. The coolant circulates in the cooling channel and cools the shielded motor 601. The control part and the electric pump are integrated into one design, which saves the connection cable between the control part and the electric pump.

[0046] The above is only a specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any person skilled in the art can easily think of changes or substitutions within the technical scope disclosed by the present invention, which should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. An airborne liquid cooling system, characterized in that: The invention comprises a cold plate (1), a controller (2), an electric valve (3), a heat exchanger (4), an expansion tank (5), a liquid cooling pump (6) and a temperature sensor (7). The cold plate (1) is arranged in an onboard pod. The liquid outlet of the cold plate (1) is provided with two pipelines connected to the liquid inlet of the expansion tank (5). The electric valve (3) and the heat exchanger (4) are arranged in sequence on one of the pipelines. The liquid outlet of the expansion tank (5) is connected to the liquid inlet of the cold plate (1) through the liquid cooling pump (6). The temperature sensor (7) is arranged at the liquid outlet of the liquid cooling pump (6). The controller (2) controls the flow rate of the electric valve (3) through the temperature signal collected by the temperature sensor (7). The expansion tank (5) is also provided with a built-in heating module. When the temperature signal collected by the temperature sensor (7) drops to a set value, the controller (2) controls the heating module to start.

2. The airborne liquid cooling system according to claim 1, characterized in that: The liquid cooling pump (6) is a rotary vane pump (602) driven by a canned motor (601). The inside of the canned motor (601) is shielded into two chambers by arranging a shielding sleeve (6011) and a sealing ring (6012). A cooling channel is formed between the two chambers. The cooling channel enters the canned motor (601) from the pump shaft of the rotary vane pump (602) and reaches the liquid inlet of the rotary vane pump (602) through the hollow motor shaft of the canned motor (601).

3. An airborne liquid cooling system according to claim 2, characterized in that: A pressure sensor (8) is provided at the liquid outlet of the liquid cooling pump (6).

4. The airborne liquid cooling system according to claim 3, characterized in that: An overflow valve (9) and a one-way valve (10) are also provided at the liquid outlet of the liquid cooling pump (6).

5. The airborne liquid cooling system according to claim 4, characterized in that: A filter assembly (12) is also provided at the liquid outlet of the liquid cooling pump (6).

6. The airborne liquid cooling system according to claim 5, characterized in that: The liquid cooling pump (6) is also provided with a ground liquid inlet (13) and a ground liquid outlet (14).

7. The airborne liquid cooling system according to claim 1, characterized in that: The electric valve (3) is a ball valve (302) driven by an electric mechanism (301).

8. The airborne liquid cooling system according to claim 7, characterized in that: The electric mechanism (301) is a servo motor, and a Hall sensor is provided on the servo motor.

9. The airborne liquid cooling system according to claim 1, characterized in that: The expansion tank (5) comprises a cylinder (501), a liquid level sensor (502) arranged in the cylinder (501), and end covers (503) arranged on both sides of the cylinder (501), and the end covers (503) are provided with an observation cover (504), a liquid inlet, a liquid outlet, an air release valve (505), and a heater (506).

10. The airborne liquid cooling system according to claim 1, characterized in that: The heat exchanger (4) is provided with front and rear wind shields (401).

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