A space-borne composite heat dissipation system and its control method

Abstract

The invention discloses an on-board composite heat dissipation system and a control method thereof. The evaporator is sequentially connected with a gas-liquid separator, a compressor, a radiation radiator and a throttling branch through a refrigerant pipeline, and the throttling branch and the bypass branch The roads are set in parallel, the throttling branch is equipped with a throttling device, the bypass branch is provided with a bypass valve, and the compressor is a miniature oil-free frequency conversion compressor. The controller collects the surface temperature of the heating equipment and controls the compressor, throttling device and bypass valve. Under different solar radiation and heating equipment load conditions, according to the surface temperature of the heating equipment, the system can realize two working modes: when the solar radiation is strong or the heat dissipation load of electronic equipment is large, the compressor runs at high speed and the throttling device works , to form a vapor compression cycle to ensure the safety of heat dissipation; when the solar radiation is weak and the heat dissipation load of electronic equipment is small, the compressor operates at low pressure and low speed, and the throttling device is bypassed to build a power heat pipe cycle to meet heat transfer requirements on the basis of energy saving.

Description

Technical field: [0001] The invention relates to a space-borne composite heat dissipation system and a control method thereof, which are suitable for heat dissipation of equipment with high heat flux density on satellites, and belong to the field of aerospace environment control. Background technique: [0002] Traditional space-borne high-heating equipment generally uses single-phase or two-phase fluids (heat pipes) to circulate through radiation radiators to dissipate heat to space. However, with the rapid development of high-frequency, integrated, and high-power electronic equipment, the heating power of electronic equipment Geometrically increasing, the traditional natural heat transfer method requires a larger and larger radiation radiator area, but it is still difficult to meet the heat dissipation requirements when the solar radiation is strong, which brings hidden dangers to the safe and reliable operation of electronic equipment. Based on this, the spaceborne vapor c...

AI Technical Summary

Problems solved by technology

However, there is no gravity on the spaceborne platform, the heat pipe cycle lacks the driving force and it is difficult to operate, and the frequent start and stop of the compressor when switching between the heat pipe mode and the vapor compression mode brings hidden dangers to the reliability of the unit, and there is no specific implementation plan and control plan for the space environment

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