A cold source system for satellite heat dissipation

Abstract

This invention provides a cooling source system for satellite heat dissipation, including a cooling source device, a piping system, and a curved radiator. The cooling source device and the curved radiator are connected via the piping system. The curved radiator is semi-cylindrical in shape, with a fluid channel inside and an inlet and outlet on its outer surface connecting to the fluid channel. The inlet and outlet are connected to the piping system. Two curved radiators can be combined to form a cylindrical shape. This invention provides a cooling source system for satellite heat dissipation, effectively cooling satellite piping and solving the problem of ineffective heat dissipation due to the complexity of satellite space piping. During heat dissipation, condensation on the surface of the curved radiator is prevented, preventing dew droplets from damaging the satellite's circuitry. Compared to traditional cooling devices, the system is more compact and easier to operate and debug.

Description

Technical Field

[0001] This invention belongs to the field of satellite manufacturing equipment and relates to a cold source system for satellite heat dissipation. Background Technology

[0002] With the rapid development of space technology, the power of launched satellites is increasing, and the heat generation phenomenon is becoming more severe. To ensure the normal operation of satellites after launch, it is necessary to simulate the operating temperature of satellites under space conditions on the ground for testing and adjustment. The space piping on satellites is complex and the connection surfaces are irregular. Traditional ground cooling methods use constant-temperature water baths for auxiliary cooling, but this method cannot meet the requirements of high-power operation and is inconvenient to debug. The satellite ground cooling system has high power requirements. Furthermore, due to the curved surface of the piping connections, the connected devices need to accommodate curved flow channels while maintaining a thin wall thickness to meet heat exchange requirements. During the cooling process, condensation occurs on the surface. Because of the complexity of the satellite's space piping, regular protective devices cannot be constructed, resulting in condensation and water formation after heat exchange, which can damage the satellite's electrical system. Therefore, it is necessary to develop a high-power cooling system with devices that accommodate curved connections and solve the condensation problem of the cooling system. Summary of the Invention

[0003] To address the above problems, this invention provides a cold source system for satellite heat dissipation, which avoids condensation during environmental simulation on the ground by using a curved radiator and insulation device.

[0004] A cooling source system for satellite heat dissipation includes a cooling source device, a piping system, and a curved radiator. The cooling source device provides cooling, and the cooling source device and the curved radiator are connected by the piping system, which circulates refrigerant between the cooling source device and the curved radiator. The curved radiator is semi-cylindrical in shape, with a hollow fluid channel inside and an inlet and outlet on its outer side. The inlet and outlet are connected to the fluid channel and to the piping system, allowing the refrigerant to circulate within the fluid channel through the inlet and outlet, thus cooling the curved radiator. Two curved radiators can be joined together to form a cylindrical shape, thereby enclosing the satellite piping.

[0005] Furthermore, the cold source unit consists of a water system, a circulating pump, a refrigeration system, a temperature control system, and a pressure stabilizing system. The water system connects the circulating pump, temperature control system, and pressure stabilizing system. The cold source unit is connected in series with the piping system through the water system. The water system stores refrigerant, which circulates through the temperature control system, pressure stabilizing system, piping system, and curved radiator under the power of the circulating pump. The refrigeration system stores refrigerant, which is used to cool the water system.

[0006] Furthermore, the refrigeration system consists of a refrigeration compressor, expansion valve, liquid receiver, gas separator, dryer filter, evaporator, and condenser. The refrigeration compressor, expansion valve, liquid receiver, gas separator, dryer filter, evaporator, and condenser are connected in series through pipes, so that the refrigerant can circulate in the refrigeration system. The refrigeration system cools the water system through the evaporator.

[0007] Furthermore, the working principle of the refrigerant is as follows: The compressor provides the power for the refrigerant circulation, bringing the low-temperature, low-pressure gaseous refrigerant into the condenser. The gaseous refrigerant is cooled into a liquid state in the condenser. Under the delivery of the compressor, the liquid refrigerant successively passes through the dryer filter, the receiver tank, and the expansion valve, and enters the evaporator. The liquid refrigerant turns into a gaseous state in the evaporator. During the refrigerant vaporization process, it absorbs heat from the refrigerant in the water system and carries it away, entering the gas separator and then returning to the compressor inlet, forming a cooling cycle, thereby cooling the water system.

[0008] Furthermore, the pressure stabilizing system consists of a water storage tank and an air filter. The water inlet of the water storage tank is located at the top, and the water outlet is located at the bottom. The air filter is installed at the top of the water storage tank and can regulate the pressure inside the water storage tank to prevent excessive internal pressure.

[0009] Furthermore, in order to achieve automatic liquid level control, a liquid level sensor and an overflow interface are installed inside the water storage tank. If the liquid level is too high, the liquid will be automatically drained, and if the liquid level is too low, an alarm signal will be issued.

[0010] Furthermore, the compressor inlet and outlet are equipped with pressure protection devices. When the evaporation temperature or condensation temperature exceeds the operating range, the pressure protection device is triggered, and the compressor stops.

[0011] Furthermore, a main filter is installed at the outlet of the water system connecting to the pipeline system to filter the coolant flowing into the pipeline system, preventing impurities in the coolant from entering the curved radiator and causing internal blockage.

[0012] Furthermore, thermal insulation cotton is pasted on the outside of the curved radiator, and after the two curved radiators are put together, a heat insulation cover is put on the outside. The inside of the heat insulation cover is filled with desiccant, and a layer of thermal insulation cotton is put on the surface of the piping system to prevent condensation from occurring on the surface of the curved radiator during operation, which could cause condensation and water droplets to fall and damage the satellite.

[0013] The cold source system for satellite heat dissipation provided by this invention can dissipate heat from satellite pipelines, solving the problem that effective heat dissipation is impossible due to the complexity of satellite space pipelines. During the heat dissipation process, it can avoid condensation on the surface of the curved heat sink, preventing dew droplets from damaging the satellite circuit system. Compared with traditional cooling devices, the device is more compact and easier to operate and debug. Attached Figure Description

[0014] The present invention will now be described in further detail with reference to the accompanying drawings:

[0015] Figure 1 This is a side view of the present invention;

[0016] Figure 2 This is a schematic diagram of the top structure of the present invention;

[0017] Figure 3 This is a schematic diagram of the connection structure of the present invention;

[0018] In the figure: 1 - cold source device; 2 - piping system; 3 - curved radiator. Detailed Implementation

[0019] To further illustrate the concept of this invention, specific embodiments will be provided below for detailed explanation. These embodiments are merely illustrative and explanatory and should not be construed as limiting the scope of protection of this invention. All technologies implemented based on the content of this invention are covered within the scope of protection intended by this invention.

[0020] A cooling source system for satellite heat dissipation comprises a cooling source device 1, a piping system 2, and a curved radiator 3, such as... Figure 1 , Figure 2 As shown.

[0021] The curved radiator 3 is a semi-cylindrical metal structure. The interior of the curved radiator 3 has a hollow fluid channel with two openings at both ends. Two sections of pipe are welded and fixed to the two openings to form an inlet and an outlet. The two curved radiators 3 are put together to form a cylindrical shape, which is a complete radiator.

[0022] The cooling source unit 1 includes a water system, a circulating pump, a refrigeration system, a temperature control system, and a pressure stabilizing system. The water system is constructed using pipes and connects the circulating pump, temperature control system, and pressure stabilizing system. The pressure stabilizing system consists of a water storage tank and an air filter. The air filter is located at the top of the water storage tank. The water storage tank contains a level sensor and an overflow port, ensuring the level sensor is below the overflow port. When connecting the water system to the water storage tank, the inlet is located at the top, and the outlet is at the bottom. A piping system 2 is constructed using pipes and connects to the water system. Refrigerant is added to the water system, and a main filter is installed at the outlet of the water system.

[0023] The refrigeration system includes a refrigeration compressor, expansion valve, liquid receiver, gas separator, dryer filter, evaporator, and condenser. Piping connects the compressor, expansion valve, liquid receiver, gas separator, dryer filter, evaporator, and condenser. Pressure protection devices are installed at the compressor inlet and outlet. The evaporator is functionally connected to the water system, allowing it to cool the water system before refrigerant is injected. Finally, a layer of insulation cotton is attached to the curved radiator 3 and the piping system 2. The internal connection structure of the cold source system is as follows... Figure 3 As shown in the figure, the black arrows indicate the direction of coolant flow in the water system.

[0024] During satellite ground simulation, two curved radiators 3 are joined together to enclose the satellite pipeline. An insulating cover containing a desiccant is then placed over the curved radiators 3. The circulation pump is then started, allowing the refrigerant to circulate within the water system, pipeline system, and curved radiators 3. The curved radiators 3 conduct heat from the satellite pipeline to its interior, and the refrigerant carries the heat away through the fluid channels, thus dissipating heat from the satellite pipeline. During the cooling process, the compressor of the refrigeration system starts, causing the refrigerant to circulate within the system. The low-temperature, low-pressure gaseous refrigerant becomes liquid in the condenser. The liquid refrigerant then passes through a dryer filter, a receiver-dryer, and an expansion valve into the evaporator. In the evaporator, the liquid refrigerant becomes gaseous, absorbing and carrying away heat from the refrigerant in the water system, and then reverting to a gaseous state. The gaseous refrigerant then enters the gas separator and returns to the compressor inlet, forming a cooling cycle that cools the water system, keeping the refrigerant at a consistently low temperature.

[0025] During operation, excessive refrigerant will cause the water level in the storage tank to rise. When the level is too high, it will automatically drain through the overflow port. Conversely, insufficient refrigerant will cause the water level to drop. When the water level falls below the level sensor, an alarm signal is triggered, prompting the addition of refrigerant. An air filter on top of the storage tank provides airflow when the water level changes, automatically regulating the internal pressure and preventing abnormal pressure in the water system. Pressure protection devices are installed at the compressor inlet and outlet of the refrigeration system. When the refrigerant evaporation or condensation temperature exceeds the operating range, the pressure protection devices will automatically trigger, stopping the compressor and protecting it. Because the curved radiator 3 and piping system 2 are covered with insulation cotton and a heat-insulating cover, outside air will not directly contact their surfaces. The insulation effect of the cotton and cover ensures that low temperatures are not conducted to their surfaces, and the surface temperature of the insulation cotton and cover remains consistent with the outside air temperature, thus preventing condensation.

[0026] In actual manufacturing, various valves can also be installed in this system for manual or automatic control, which is a common practice for those skilled in the art and therefore not explicitly described. The temperature control system uses existing temperature measuring devices to detect the temperature of the refrigerant in the water system and feeds the detection results back to the system's control equipment to automatically adjust the operating parameters of the cold source system. In this invention, the refrigerant is ethylene glycol antifreeze, the piping system 2 uses synthetic rubber tubing with an operating temperature of -40℃ to 99℃, and the refrigerant is R404A. All pipes in both the water and refrigeration systems are made of 304 or higher grade stainless steel sanitary tubing, welded using argon arc welding. After welding, the inside of the pipes is passivated, and the outside is polished. The insulation cotton pasted on the curved radiator 3 and piping system 2 is 10mm thick, with a thermal conductivity of approximately 0.021W / m / K and a compressive strength of approximately 150kPa, to meet the operating requirements of the cold source system.

[0027] There are many methods and approaches that can realize the technical solution of this invention, and the above are merely preferred embodiments provided by way of example. Those skilled in the art can conceive of many modifications, alterations, and substitutions without departing from this invention. It should be understood that various alternatives to the embodiments of this invention described herein can be employed in the practice of this invention. The appended claims are intended to define the scope of this invention and therefore cover the methods within the scope of these claims and their equivalents. Based on the embodiments of this invention, all other embodiments obtained by those skilled in the art without inventive effort are within the scope of protection of this invention.

Claims

1. A cold source system for satellite heat dissipation, characterized in that: It includes a cold source device (1), a piping system (2) and a curved radiator (3). The cold source device (1) and the curved radiator (3) are connected through the piping system (2). The curved radiator (3) is semi-cylindrical in shape. The curved radiator (3) has a fluid channel inside and an inlet and outlet on the outer side that connect to the fluid channel. The inlet and outlet are connected to the piping system (2). The two curved radiators (3) can be combined to form a cylindrical shape. The cold source device (1) includes a water system, a circulating pump, a refrigeration system, a temperature control system, and a pressure stabilizing system. The water system connects the circulating pump, the temperature control system, and the pressure stabilizing system in series. The cold source device (1) is connected to the pipeline system (2) through the water system. The refrigeration system stores refrigerant, and the water system stores coolant. The refrigeration system cools the water system. The refrigeration system includes a refrigeration compressor, an expansion valve, a liquid receiver, a gas separator, a dryer filter, an evaporator, and a condenser. The refrigeration compressor, expansion valve, liquid receiver, gas separator, dryer filter, evaporator, and condenser are connected in series through pipes. The refrigeration system cools the water system through the evaporator. Insulation cotton is provided outside the curved radiator (3). After the two curved radiators (3) are put together, an insulation cover is installed on the outside, and a desiccant is provided inside the insulation cover. Insulation cotton is provided on the surface of the pipeline system (2). The compressor provides the circulating power, carrying the low-temperature, low-pressure gaseous refrigerant into the condenser. The gaseous refrigerant turns into a liquid in the condenser. The liquid refrigerant passes through the dryer filter, the receiver tank, and the expansion valve, and enters the evaporator. In the evaporator, the liquid refrigerant turns into a gas, absorbs heat from the refrigerant in the water system, and carries it away. It then enters the gas separator and returns to the compressor inlet, forming a cooling cycle to cool the water system.

2. The cold source system for satellite heat dissipation according to claim 1, characterized in that: The pressure stabilizing system includes a water tank and an air filter. The water inlet of the water tank is located at the top, the water outlet is located at the bottom, and the air filter is located at the top of the water tank.

3. The cold source system for satellite heat dissipation according to claim 2, characterized in that: The water storage tank is equipped with a liquid level sensor and an overflow port.

4. The cold source system for satellite heat dissipation according to claim 3, characterized in that: The compressor is equipped with pressure protection devices at its inlet and outlet. When the evaporation temperature or condensation temperature exceeds the operating range, the pressure protection device is triggered, and the compressor stops.

5. The cold source system for satellite heat dissipation according to claim 4, characterized in that: A main filter is installed at the outlet of the water system connecting the pipeline system (2) to filter the refrigerant flowing into the pipeline system (2).

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