Noise reduction and temperature control system based on semiconductor refrigeration mechanism

Abstract

The invention discloses a noise reduction and temperature control system based on a semiconductor refrigeration mechanism. The noise reduction and temperature control system based on the semiconductor refrigeration mechanism comprises a heat radiating system, a refrigeration system and a temperature control system. The heat radiating system adopts a heat tube heat radiating fin, the refrigeration system comprises a circuit chip, a semiconductor refrigerator and a temperature sensor, and the temperature control system comprises a driving circuit, a D / A converter, a single chip microcomputer and a temperature displayer. The noise reduction and temperature control system is designed based on the Peltier effect and can create a low-temperature working environment for a circuit chip, reduce multiple types of noise relevant with the temperature, effectively improve signal to noise ratio and widen a dynamic range. The noise reduction and temperature control system based on the semiconductor refrigeration mechanism is simple in structure and low in cost and has the advantages of being free of refrigerants, good in environment-friendly performance, free of moving parts, low in vibration and noise and the like.

Description

technical field [0001] The invention belongs to the technical field of power electronic temperature control applications, and in particular relates to a noise reduction temperature control system based on a semiconductor refrigeration mechanism. Background technique [0002] Semiconductor refrigeration is also called thermoelectric refrigeration or thermoelectric refrigeration. It is an artificial refrigeration technology based on the Peltier effect. Compared with conventional mechanical refrigeration, it has many advantages, such as no refrigerant, good environmental protection; no moving parts, low vibration and noise; high refrigeration coefficient when cooling with low power; convenient cooling and heat conversion; fast cooling speed , quick response, can quickly realize large temperature difference; good adjustment performance; easy to miniaturize, etc. Therefore, semiconductor refrigeration has opened up a new field of refrigeration technology and expanded the applica...

AI Technical Summary

Problems solved by technology

The data shows that around room temperature, the dark current noise of the CCD caused by the temperature can be reduced by an order of magnitude every time the temperature drops by 10°C, but the low temperature puts forward requirements on the vacuum tightness of the probe and the refrigeration equipment. If the temperature is too low, water vapor will condense. thereby seriously damaging the chip

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