便携式低温恒温槽的研制及性能试验

Development of A Portable Low Temperature Thermostat

设计了一种便携式低温恒温槽。采用微型压缩机制冷和侧搅拌技术,提高了设备便携性,扩展了工作区有效插入深度。其控制温度范围为-40~95℃,有效工作区域为液面下70~220 mm,在0~95℃范围内温度均匀性达到10 m K量级。在-40℃时,温度均匀性优于0.06℃,可用于短型温度传感器的现场校准。

The paper introduces a portable low temperature thermostat. Based on principles of compressor refrigeration and the side stirring structure,we effectively enhance the portability of the equipment and increase the effective depth of working region. The temperate homogeneity of this thermostat is less than 0. 06℃ at- 40℃ and reaches 10 m K-scale with the measurement range from 0℃ to 95℃,and the effective work area is from 70 mm to 220 mm under the surface. It can meet the requirement of the field calibration of short-model temperature sensors.