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Display cooler air-cooled condenser condensing pressure adjustment
display cooler air-cooled condenser condensing pressure adjustment
1) The method of changing the air volume of the cooling fan is generally used to adjust the motor frequency conversion speed (or electromagnetic clutch speed) by the display cooler cooling fan, and also The pressure relay can be used to control the start and stop of some air coolers to adjust the cooling air volume, thereby achieving the purpose of controlling the condensation pressure of the air-cooled condenser.
2) Use the pressure regulating valve and the bypass regulating valve to adjust the condensing pressure. When the condensing pressure drops in winter, the pressure regulating valve closes the regulating valve according to the condensing pressure in front of the valve to increase the liquid level in the condenser and reduce the condensing area. Make the condensing pressure rise back to a given value; when the condensing pressure rises, the pressure regulating valve will open to make full use of the condensing area and prevent the condensing pressure from increasing excessively. The bypass regulating valve controls its opening according to the pressure in the reservoir (the pressure after the valve), so that the pressure in the reservoir and the condenser pressure always maintain a constant difference (generally about 0.05MPa).
temperature adjustment and its control components display cooler system usually uses temperature relays to adjust the cabinet temperature. It is a two-position control regulator, also known as a temperature controller. For a single unit and a single cabinet, a temperature relay can be used to directly control the start and stop of the compressor according to the cabinet temperature to maintain the stability of the cabinet temperature. For single machine and multiple cabinets, temperature relays and solenoid valves can be used together to independently control the temperature of each cabinet. According to the different structure and operating principle, the commonly used temperature controllers are pressure-sensitive and electronic temperature-controlled. Pressure temperature-sensitive temperature controller is also called temperature bulb type temperature controller. It is mainly composed of temperature bulb, bellows, temperature-sensitive capillary tube, lever, adjusting screw, knob, etc. The compressor is controlled by the temperature bulb feeling the change of the display cooler. Run. When the cabinet temperature rises above the upper limit of the set value, the compressor is controlled to start; when the cabinet temperature falls beyond the lower limit of the set value, the compressor is controlled to stop.
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