Temperature control device for periodical working heat source in spaceflight

Abstract

The invention relates to a low-power-consumption high-precision temperature control device for a periodical working heat source in spaceflight, wherein the temperature control device belongs to the field of temperature control technology of the periodical working heat source in a spaceflight field. Particularly the temperature control device is suitable for conditions of short working time and long idle time of the periodical working heat source. The temperature control device is composed of thermoelectric refrigerator, a phase change heat tube, a heat radiating panel, a temperature sensor and a control circuit. The cold surface of the thermoelectric refrigerator is connected with the heat source, and the heat surface is connected with one end of a phase change heat tube. The other end of the phase change heat tube is connected with the heat radiating panel. An active temperature control loop which is composed of the thermoelectric refrigerator, the control circuit and the temperature sensor that is bound on the heat source decides for making the thermoelectric refrigerator perform forward working for refrigerating or perform backward working for heating. The temperature control device has advantages of low power consumption and small heat radiation area.

Description

technical field [0001] The invention relates to a low-power consumption high-precision temperature control device for periodically working heat sources in aerospace, which belongs to the technical field of temperature control for periodically working heat sources in the aerospace field, and is especially suitable for situations where the periodically working heat sources have short working hours and long non-working hours . Background technique [0002] The characteristic of periodic working heat source is that it only works for a period of time in each cycle, and does not work for the rest of the time. Many periodic working heat sources in the aerospace field have very strict requirements on temperature stability. For example, the CCD device of the camera has high heat generation density and small heat capacity. Ten degrees, and the excessive temperature fluctuation of the CCD device will increase the dark current and thermal noise, thereby reducing the ability of photoele...

AI Technical Summary

Problems solved by technology

Due to the strict heat dissipation requirements of the thermal surface of the thermoelectric cooler, it is very easy to have a large temperature difference between the cold and the hot surface and a low cooling coefficient when the thermoelectric cooler is used alone, resulting in a large heat dissipation area and a large power consumption when the heat source does not work. Therefore, The average thermal control power consumption of the system cycle is large

[0006] From the above analysis, we know that the existing high-precision control technology for aerospace periodic heat sources mainly has the disadvantages of high cycle average thermal control power consumption and large heat dissipation area.

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