How to control the temperature and humidity inside the constant temperature and humidity test chamber

The constant temperature and humidity test chamber has four capabilities:

One: heating capacity 1: heating device is to control the constant temperature and humidity test chamber is not the key to increase the temperature 2: it is the controller to get the temperature command will output voltage to the relay, about 3-12 VDC plus solid state relay above; Its AC terminal is equivalent to the wire connection; the contactor is also at the same time suction, the heater has a voltage at both ends to make it heat, and the heat is brought to the box through the circulating fan, so that the constant temperature and humidity testing machine heats up 3 that the temperature reaches quickly Your set value; controller through on-off adjustment of solid state relays 4: We in the constant temperature and humidity test box to see how much heat output on the screen to adjust the heat; this is more than 89 degrees temperature control, the temperature below 89 degrees How to control stability? The constant temperature and humidity test chamber is how much heat is generated on the one side through the solid state relay; the other is through the refrigeration cycle of the compressor to achieve dynamic balance; the temperature is constant.
II: Cooling ability 1: The important part of the constant temperature and humidity test box is an important parameter for determining the performance of a constant temperature and humidity machine. It consists of four components: compressor, condenser, throttling device, and evaporator.
2: The compressor is the heart of the refrigeration system. It inhales low-temperature and low-pressure gases, turns into high-temperature and high-pressure gases, and releases heat through condensation into liquids. The heat is taken away by the fans. Therefore, the temperature below the constant temperature and humidity is the cause of hot air, and then throttling to The low-pressure liquid, secondly, passes through the evaporator to become the 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 to achieve the purpose of cooling, and completes the temperature reduction process of the constant temperature and humidity machine.
Three: Humidification ability IV: The ability to dehumidify The dehumidification system is also accomplished by a refrigeration system. The evaporator is placed in a constant temperature and humidity test chamber. In a cold, constant temperature and humidity chamber, the high humidity gas meets a cold object and condenses into a liquid; Repeated cases of high humidity gas will be few, to achieve the purpose of dehumidification