The principle of how the slide valve in a refrigeration machine regulates the working volume
Thread Content
The refrigeration compressor’s slide valve regulates the working volume of the refrigerator by controlling the operating condition of the compressor and the working pressure of the condenser. The specific principle is as follows: Compressor control: The slide valve controls the operating condition of the compressor by adjusting its air intake volume or compression ratio. When it is necessary to adjust the working volume of the freezer, the slide valve changes the exhaust volume of the compressor, thereby affecting the condensation temperature and pressure in the condenser. Condenser control: The working volume of the refrigerator is adjusted by further regulating the operating pressure and temperature of the condenser. The slide valve can adjust the flow rate and pressure of the refrigerant within the condenser, thereby regulating the condensation temperature and pressure of the system and affecting the working volume of the refrigerator. By controlling the compressor and condenser, the slide valve can effectively adjust the working volume of the refrigeration unit to meet the cooling requirements under different operating conditions. I’m not sure exactly which parameters are adjusted to change the working volume, such as the screw clearance? It’s still the cavity volume. The condenser only reduces the temperature of the refrigerant; it doesn’t have any direct effect on the working volume, right?
The principle by which the slide valve of a refrigeration machine regulates the working volume is mainly achieved by changing the amount of air intake to the compressor. The slide valve can adjust the effective volume of the internal chamber of the compressor, that is, it changes the cross-sectional position from the intake side to the axial direction, thereby controlling the amount of refrigerant drawn in by the compressor. In screw compressors, the slide valve adjusts the meshing position between the screws, changing the volume at the intake and exhaust ends and affecting the point at which suction ends, thereby regulating the compressor’s discharge volume and working volume. The condenser is indeed used to cool and condense the refrigerant; by changing its pressure and temperature, it can indirectly affect the performance of the refrigerator. However, the adjustment of the working volume is achieved through a slide valve, rather than being adjusted directly. .
The principle by which the slide valve of a refrigeration machine regulates the working volume is mainly achieved by changing the amount of air intake to the compressor. The slide valve can adjust the effective volume of the internal chamber of the compressor, that is, it changes the cross-sectional position from the intake side to the axial direction, thereby controlling the amount of refrigerant drawn in by the compressor.
Once the operating conditions of the refrigerant are determined, the suction pressure of the compressor is also fixed. The condenser affects the condensation pressure, which in turn leads to changes in the compression ratio. Manufacturers with good control logic will adjust the volume ratio in response to these changes in compression ratio. The slide valve mainly affects the intake air volume load
You can refer to this York unit