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What are the common failures of commercial refrigeration refrigeration systems (2)
author: supermarket refrigerated showcase category: walk-in display coolers Views: 506Time: 2016-08-22
What are the common failures of commercial refrigeration refrigeration systems (2)
2) Safety device solenoid valve: The solenoid is overheated and burned, and it is easy to cause dirty blockage and brakes, which affect the refrigerant cycle. Pressure controller: The electrical control contact is aging, fouling and malfunctioning. At the same time, the signal capillary is easy to accumulate oil and bend, which hinders flexible movement. Pressure gauge: long-term jitter failure, incorrect value, and regular calibration to adjust. Regarding commercial refrigeration safety type instruments, components and pressure vessels should be sent to professional measurement units for regular inspection and appraisal.
3) The temperature controller of the control part: the value is inaccurate, the value of the upper and lower amplitude difference affects the temperature accuracy of the commercial refrigeration, and it will also cause failure, that is, electrical contact adhesion, fouling, and flipping, breaking or shifting, and it cannot be controlled The opening action meets the requirements. Water flow relay: It often fails. Due to long-term water immersion, metal parts are left on brakes, especially the uneven cooling water flow rate, which will cause repeated actions of the electrical appliances.
4) When the cooling performance of the cooling part of the cooling tower decreases, the temperature difference between the inlet and outlet decreases, which gradually causes a vicious cycle, and the cooling water temperature of the compressor is too high, which affects the refrigeration cycle. Water pump: Due to long-term operation, the shaft seal is easy to leak and exceed the standard, which reduces the pump flow. In addition, it is necessary to prevent from cavitation.
5) Partial load unevenness is one of the reasons for the failure of commercial refrigeration refrigeration equipment. Too much inventory, too high temperature, and too many commercial refrigeration door openings will adversely affect the operation of the equipment.
6) Refrigeration system The refrigeration system is a concentrated area of failures, especially the equipment is prone to failures during variable load operation. As the temperature rises, the cooling conditions become worse, the load increases, and the malfunction of the compressor during full-load operation also increases. At the same time, the compressor efficiency decreases and the cooling capacity also decreases.
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