How to judge the performance of the constant temperature and humidity machine.

Cooling is an important part of a constant temperature and humidity machine. It is important to determine the performance of a constant temperature and humidity machine. The high and low temperature test chamber is composed of compressor, condenser, throttling device and evaporator. The compressor is for refrigeration. The heart of the system, it sucks in low-temperature and low-pressure gas, turns into high-temperature and high-pressure gas, releases heat by condensing into liquid, and takes away the heat through a fan. Therefore, under the constant temperature and humidity machine is caused by hot air, and then throttling to low pressure liquid, and then through evaporation The device becomes a low temperature and low pressure gas and finally returns to the compressor.

The refrigerant absorbs heat in the evaporator to complete the gasification process and absorbs heat to achieve the purpose of refrigeration and complete the cooling process of a constant temperature and humidity machine.

When the tested product (component, component, component or complete machine) is placed in a constant temperature and humidity test box for testing, in order to ensure that the surrounding atmosphere of the tested product can meet the environmental conditions specified in the high and low temperature box test specification, constant temperature and humidity test The following rules should be followed between the size of the working space of the box and the outer size of the tested product:.

A The volume (W×D×H) of the tested product of the constant temperature and humidity test box shall not exceed the effective working space of the constant temperature and humidity test box (20-35) (20 is recommended). It is recommended that the product that generates heat during the test is not selected. Greater than 30.

B The ratio of the windward cross-sectional area of the tested product to the total area of the working chamber of the constant temperature and humidity test box on the cross-section is not greater than (35-50) (35 is recommended).

C The distance between the outer surface of the tested product and the wall of the constant temperature and humidity test chamber should be at least 100-150mm (150mm is recommended).