Working Principle Of The Temperature Test Chamber

The temperature test chamber achieves precise temperature control through the coordinated operation of a refrigeration and heating system. The refrigeration system uses a compressor to compress the refrigerant into a high-temperature, high-pressure gas (such as R404A). After liquefaction by the condenser, the gas is depressurized by a throttling valve and finally cools in the evaporator at a low temperature and low pressure (refrigeration efficiency can reach over 90%). The heating system typically uses nickel-chromium alloy heating wire with an adjustable power range of 3-15kW and a heating rate of approximately 3℃/min. The chamber is equipped with a PT100 platinum resistance temperature sensor (accuracy ±0.1℃), working in conjunction with a PID intelligent controller (temperature control accuracy ±0.5℃) to achieve dynamic adjustment-heating is activated when the measured temperature is lower than the set value, and cooling is switched when the temperature is higher than the set value. This system is suitable for scenarios such as lithium battery aging testing (-40℃~85℃) and material thermal deformation testing.