The constant temperature and humidity test chamber is mainly composed of temperature control (low temperature refrigeration, high temperature heating,) and humidification. The fan installed at the top of the test box is rotated, and the outside air is introduced into the box to realize air circulation, balance the temperature and humidity in the box, and the data collected by the temperature and humidity sensors in the test box is transmitted to the temperature and humidity controller. Computer technology is used to measure and control the ambient temperature and humidity for editing, and the required values ​​for the experiment are obtained by the air heating unit, the condensing tube, the evaporation unit, and the cascade refrigeration compressor.
The internal operation is through the three systems of air circulation system, electrical control system compressor and refrigeration cycle system to complete the work together. How do the three work, how do they achieve mutual stability and mutual control?
(1) Air circulation system - the centrifugal fan is responsible for drawing air from the air return port. The air passes through the evaporator, humidifier and electric heater, and is sent to the space tested by the user through the air supply port after cooling or warming, dehumidifying or humidifying. The air sent out is mixed with the air in the space and returned to the return air port. Thus, the circulating operation reaches a stable test temperature.
(2) Electrical appliance automatic control system - this section includes the power supply section and the automatic control section. The power supply part supplies the power supply automatic control part to the compressor, the fan, the electric heater, the humidifier, etc. through the contactor, and the part is the temperature and humidity control and the fault protection part. The temperature and humidity control is to compare the temperature and humidity of the return air with the temperature and humidity set by the test through the temperature and humidity controller, and automatically run the compressor, humidifier, electric heating and other components to cool, warm, dehumidify, and achieve constant temperature and humidity. Automatic control.
(3) Compressor refrigeration cycle system - the liquid refrigerant in the evaporator absorbs the heat of the air (the air is cooled and dehumidified) and begins to evaporate, causing a certain temperature difference between the refrigerant and the air, and the liquid refrigerant is completely evaporated. It becomes gaseous and is then sucked in by the compressor and compressed (pressure and temperature increase). The gaseous refrigerant absorbs heat through a condenser (air-cooled/water-cooled) and condenses into a liquid. After the throttle valve (or capillary tube) is throttled, it becomes a low-temperature low-pressure refrigerant and enters the evaporator to complete the refrigerant cycle.
The constant temperature and humidity test chamber control mode is multi-stage programming control: the control system has preset temperature and humidity curves, and the ability to control according to presets, and can be set in multiple stages. The constant temperature and humidity test chamber has the ability to complete the test according to the preset curve. Process and cycle, and can control the rate of temperature rise and temperature decrease within the range of *high temperature rise and temperature drop rate capability, that is, the temperature rise and temperature drop rate can be controlled according to the slope of the set curve.
The internal operation is through the three systems of air circulation system, electrical control system compressor and refrigeration cycle system to complete the work together. How do the three work, how do they achieve mutual stability and mutual control?
(1) Air circulation system - the centrifugal fan is responsible for drawing air from the air return port. The air passes through the evaporator, humidifier and electric heater, and is sent to the space tested by the user through the air supply port after cooling or warming, dehumidifying or humidifying. The air sent out is mixed with the air in the space and returned to the return air port. Thus, the circulating operation reaches a stable test temperature.
(2) Electrical appliance automatic control system - this section includes the power supply section and the automatic control section. The power supply part supplies the power supply automatic control part to the compressor, the fan, the electric heater, the humidifier, etc. through the contactor, and the part is the temperature and humidity control and the fault protection part. The temperature and humidity control is to compare the temperature and humidity of the return air with the temperature and humidity set by the test through the temperature and humidity controller, and automatically run the compressor, humidifier, electric heating and other components to cool, warm, dehumidify, and achieve constant temperature and humidity. Automatic control.
(3) Compressor refrigeration cycle system - the liquid refrigerant in the evaporator absorbs the heat of the air (the air is cooled and dehumidified) and begins to evaporate, causing a certain temperature difference between the refrigerant and the air, and the liquid refrigerant is completely evaporated. It becomes gaseous and is then sucked in by the compressor and compressed (pressure and temperature increase). The gaseous refrigerant absorbs heat through a condenser (air-cooled/water-cooled) and condenses into a liquid. After the throttle valve (or capillary tube) is throttled, it becomes a low-temperature low-pressure refrigerant and enters the evaporator to complete the refrigerant cycle.
The constant temperature and humidity test chamber control mode is multi-stage programming control: the control system has preset temperature and humidity curves, and the ability to control according to presets, and can be set in multiple stages. The constant temperature and humidity test chamber has the ability to complete the test according to the preset curve. Process and cycle, and can control the rate of temperature rise and temperature decrease within the range of *high temperature rise and temperature drop rate capability, that is, the temperature rise and temperature drop rate can be controlled according to the slope of the set curve.
China Extract Powder For Use As Dietary Supplement Extract Powder, Extract Powder Manufacturer
Shaanxi Kang New Pharmaceutical co., Ltd. , https://www.bodybuildingoil.com