The three major functions of a constant temperature and humidity test chamber

1、 Heating capacity

1. Is the heating device a key link in controlling the temperature and humidity of the constant temperature and humidity test chamber

When the controller receives a temperature command, it outputs a voltage to the relay, with approximately 3-12 volts of DC applied to the solid-state relay; Its communication end is equivalent to a wire connection; The contactor also closes simultaneously, and there is voltage at both ends of the heater to generate heat. The heat is carried into the box by the circulating fan, which heats up the constant temperature and humidity test box

3. The temperature is about to reach your set value; The controller adjusts the on-off state of the solid-state relay by adding it

4. We adjust the heat generation by observing the heating output on the screen in the test chamber; This is temperature control above 89 degrees, how to control temperature stability below 89 degrees? The constant temperature and humidity test chamber generates heat and output through a solid-state relay on one side; Furthermore, dynamic equilibrium is achieved by cooling through a compressor refrigeration cycle; The temperature remains constant.

2、 Cooling ability

1. The constant temperature and humidity test chamber is an important component that determines the performance of the test chamber. It includes four major components: compressor, condenser, throttling device, and evaporator

2. The compressor is the heart of the refrigeration system, which sucks in low-temperature and low-pressure gas, turns it into high-temperature and high-pressure gas, condenses it into a liquid to release heat, and takes away the heat through a fan. Therefore, the hot air under the test chamber is the cause, and then throttled to become low-pressure liquid. It then passes through the evaporator to become 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 absorb heat, achieving the purpose of refrigeration and completing the cooling process of the test chamber.

3、 Humidification and dehumidification capabilities

The dehumidification system is also completed by the refrigeration system, with the evaporator placed in the test chamber; It is relatively cold, and the high humidity gas inside the test chamber condenses into liquid when encountering cold objects; The high humidity gas in the box will be reduced repeatedly, achieving the purpose of dehumidification.