1. The heater is a key element in controlling whether the chamber can heat up with constant temperature and humidity.
2. The controller outputs voltage to the relay when it receives the command to increase the temperature. There is 3-12 volts DC across the SSR, and the AC end is equivalent to a wire connection; at the same time, the contactor also attracts, and there is voltage on both ends of the heater so that it generates heat, and then the heat from the circulation fandriven and brought into the box to allow the test box to heat up.
3. When the temperature is about to reach the set value, the controller adjusts by charging the on-off of the solid state relay.
4. Stable temperature control, on the one hand, by the heat generation of the solid state relay, and on the other hand, by the refrigeration cycle of the compressor to cool down, to achieve dynamic equilibrium, the temperature can be constant.
2. Cooling ability
1. This is an important part of the constant temperature test chamber and Humidity, and it is also an important parameter to judge the performance of the test chamber. It mainly consists of compressors, condenser, evaporator and throttling device consist of four parts.
2. The key of the cooling system is the compressor , which sucks in low-temperature and low-pressure gas, converts it into high-temperature and high-pressure gas, releases heat by condensing into liquid, and then carries the heat with the fan, so the test, under the machine is the hot air, and then it becomes by throttling to a mortgage liquid and then by evaporator to a low temperature gas und low pressure and finally returns to the compressor.
The refrigerant absorbs heat in the evaporator and completes the gasification process. During this process, it absorbs heat and serves the purpose of cooling, completing the cooling of the test machine.
3. Humidification and dehumidification functions
The dehumidification system is also completed by the cooling system. The evaporator is relatively cold in the test chamber and the high humidity gas is precondensed into a liquid in the test chambernized After repeated time, the high humidity gas in the box will be less, achieving the purpose of dehumidification.