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Screw refrigeration compression belongs to volumetric refrigeration compressor. It uses a pair of interlocking male and female rotors to make a rotary motion in the body, periodically changing the volume between each pair of tooth slots of the rotor to complete the suction, compression, and exhaust processes.
The screw compression refrigeration unit consists of a screw refrigeration compressor, a condenser, a shut-off device and an evaporator; the compressor compresses Freon into a high-temperature and high-pressure gas during operation, and then discharges it to the condenser; because the external cold source absorbs heat, Freon is in The condenser is condensed into a high-pressure liquid; then the liquid Freon is transformed into a low-temperature and low-pressure liquid through the throttle of the throttle valve, and then supplied to the evaporator; the low-temperature and low-pressure liquid is evaporated to a low temperature and low pressure when the external refrigerant heat source is heated The gas is then sucked back by the compressor, which completes a refrigeration cycle.
1. Inhalation process
When the rotor of the refrigerator rotates, the groove volume gradually expands with the rotation of the rotor, and communicates with the suction port. The gas from the evaporation system enters the groove volume through the orifice for the gas suction process. After the rotor rotates to a certain angle, the volume between the teeth crosses the position of the suction orifice and is disconnected from the suction orifice, and the suction process ends.
(1) Compression process
When the rotor of the refrigerator continues to rotate, the gas in the tooth groove closed by the body, the suction end seat and the exhaust end seat is pressed toward the exhaust end due to the mutual engagement of the female and male rotors and the mutual filling of the teeth. At the same time, the pressure is gradually increased to perform the compression process.
3. Exhaust process
When the rotor of the artisan refrigerator rotates to make the cogging space communicate with the exhaust port on the exhaust end seat, the gas is pressed out and discharged from the exhaust flange port to complete the exhaust process. ㄠThe working cycle in each cogging space must have the above three processes. When the compressor is running at high speed, several pairs of cogging working volumes repeat the suction, compression and exhaust cycles, so that the compressor can The gas is continuous and stable.
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