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display cases Energy-saving transformation

author:  supermarket refrigerated showcase category:  walk-in display coolers Views:  784Time:  2016-08-22
display cases Energy-saving transformation
display cases Energy-saving transformation
case — refrigerated showcase Deep well pump with digital frequency conversion display cases control system
refrigeration system safety operation management
3n> refrigeration system safe operation management is in the category of low-pressure refrigerants (
n9) It is toxic, suffocating, flammable and explosive, and has strict requirements for the safe operation of the system. In order to ensure the safe operation of the display cases refrigeration system, not only must the correct design, correct material selection, careful manufacture and inspection, but also correct use and operation. The refrigeration system must have complete safety equipment, and the quality and mechanical strength of all manufacturing materials must meet the relevant national technical standards. At the same time, proper use and operation are essential to ensure the safe operation of the refrigeration system.
safety device
1. Pressure monitoring and safety equipment
1) Pressure monitors whether the refrigeration system is operating in a safe state, and its main monitoring method is to display the pressure of each part of the system through a pressure gauge. In this way, on the one hand, it is convenient to carry out normal operation management; on the other hand, it can detect whether there is any abnormality or overpressure in the refrigeration equipment in time, and control or alarm.
2) Pressure protection safety equipment In order to prevent overpressure operation, the refrigeration equipment is equipped with safety valves or pressure control relays, or differential pressure control relays, and pressure protection safety equipment such as automatic alarms. Once the working pressure is abnormal and the overpressure operation occurs, the safety equipment will automatically act to discharge the gas in the equipment to a part of the atmosphere or automatically shut down to ensure that the refrigeration system will not cause accidents due to overpressure operation. Therefore, the pressure protection safety equipment shall not be adjusted or removed arbitrarily.
2. In order to prevent the wet stroke of the compressor, liquid level monitoring and safety equipment must be equipped with liquid level indicator, control and alarm devices on the gas-liquid separator, low-pressure circulation barrel, and intercooler, and on the display cases low-pressure reservoir. Liquid level indicator and alarm device. Liquid level indicators should be installed in drain buckets and oil collectors.
3. Temperature monitoring and safety equipment The suction side of the compressor, the shaft sealer end, the distribution station and the hot refrigerant header are all equipped with thermometers to monitor and record the operating conditions of the refrigeration system. In order to avoid excessive exhaust temperature, a temperature controller is generally installed on the compressor exhaust pipe, and thermometers are also installed on large and medium-sized motors. The types of thermometers used mainly include thermocouple thermometers, resistance thermometers, semiconductor thermometers and mercury thermometers with electrical contacts.
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