Basic principle of temperature and humidity control box

The temperature and humidity control box is suitable for damp heat test of various small electrical appliances, instruments, materials and components, and it is also suitable for aging test. This test box adopts the current reasonable structure and stable and reliable control mode, so that it has beautiful appearance, simple operation, safety, high precision of temperature and humidity control. It is an ideal equipment for constant temperature and humidity test.

The refrigeration cycle of the temperature and humidity control box adopts the reverse Karo cycle, which consists of two isothermal processes and two adiabatic processes. The process is as follows: the refrigerant is adiabatically compressed to a higher pressure by the compressor, the work consumed increases the exhaust temperature,  temperature and humidity control box and then the refrigerant isothermal exchanges heat with the surrounding media through the condenser, transferring heat to the surrounding media. After that, the refrigerant expands adiabatically through the shut-off valve to do work, and then the refrigerant temperature decreases. The refrigerant absorbs heat isothermally from the object with higher temperature through the evaporator, which reduces the temperature of the object to be cooled. This cycle starts again and again, so as to achieve the purpose of cooling.