The working principle of high and low temperature circulation chamber

The working principle of high and low temperature chamber refrigeration: the refrigeration cycle adopts the reverse Karo cycle, which consists of two isothermal processes and two adiabatic processes. The process is as follows: the refrigerant is adiabatically compressed to a higher pressure by the compressor, and the work is consumed The temperature of the exhaust gas is increased, and then the refrigerant exchanges heat with the surrounding medium isothermally through the condenser to transfer the heat to the surrounding medium.

After the refrigerant passes through the throttle valve adiabatic expansion to perform work, at this time the temperature of the refrigerant decreases.

The high and low temperature circulation chamber refrigerant absorbs heat isothermally from the higher temperature object through the evaporator, so that the temperature of the cooled object is lowered.

This cycle repeats itself to achieve the purpose of cooling down. The refrigeration system of this high and low temperature test chamber adopts a unit refrigerant refrigeration system composed of a French-made Taikang hermetic compressor.

The high and low temperature circulation chamber operation of air discharge in the refrigeration system of the constant temperature and humidity test chamber

The operation steps of the freon system to release air

Close the outlet valve of the accumulator or condenser.

Start the compressor and collect the refrigerant in the low-pressure section into the condenser or accumulator.

After the low pressure system pressure drops to a stable vacuum state, the machine will stop.

high and low temperature circulation chamber Loosen the screw plug of the bypass hole of the exhaust shut-off valve, and turn the exhaust valve stem clockwise (twist about half a turn) to make the valve F-shaped, allowing high-pressure gas to escape from the bypass hole. Block the exhaust airflow with the palm of your hand. When you feel cold air and oil stains on your hands, it means that the air has been basically exhausted. Tighten the screw plug, reverse the exhaust valve stem, and close the bypass hole.