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一、前言卫生医疗单位为低温贮藏血液和生物制品所使用的冰箱、血库,都安有恒温控制装置。国内生产的冰箱、血库,多数选用压力式温度继电器作自动控温装置。以它来感测温度并作温度开关,控制制冷压缩机的开停,达到恒温的目的。国外进口的一些冰箱,有用电子线路来进行恒温控制,较简易的有用热敏电阻作感温探头,组成桥式电路,后接放大器、开关电路,便成了温度开关。
First, the preface Health and medical units for the cryogenic storage of blood and biological products used in refrigerators, blood banks, all have a thermostat control device. Domestic production of refrigerators, blood banks, most of the selection of pressure-type temperature relay for automatic temperature control device. With it to sense the temperature and make temperature switch, control the opening and closing of the refrigeration compressor to achieve the purpose of constant temperature. Foreign imports of some refrigerators, useful electronic circuits for temperature control, simple and useful thermistor as a temperature probe, the composition of the bridge circuit, followed by amplifiers, switching circuits, has become a temperature switch.