How to correctly configure refrigeration equipment in c […]
How to correctly configure refrigeration equipment in cold storage? According to the size of the cold storage, the type of items stored and the temperature to be achieved, whether domestic or imported brands, the cold storage is good as long as it is properly configured. So how to configure the refrigeration equipment of the cold storage? Let's analyze it together.
Library plate: pre produced, with fixed length, width and thickness, which can be selected according to the needs of library installation. Generally, 10 cm thick plates are used for high and medium temperature cold storage, and 12 cm or 15 cm thick plates are used for low temperature and freezing storage.
Damp proof course: generally made of asphalt, linoleum, plastic coating, plastic film or metal plate.
Refrigeration compressor: generally, the small-scale cold storage adopts the totally enclosed compressor. Semi closed compressors are generally used in medium-sized refrigerators. Semi enclosed compressor or screw compressor is selected for large cold storage.
In the refrigeration system of the refrigeration equipment of the cold storage, in addition to the refrigeration compressor, the static equipment meeting the basic principle of refrigeration is generally called the main equipment, such as condenser and evaporator; the static equipment ensuring other functions of the system is called the auxiliary equipment, such as the liquid accumulator, vapor-liquid separator, low-pressure circulating barrel, etc.
Evaporator: generally, the fan is selected as the evaporator for the high-temperature warehouse, which is characterized by fast cooling speed, but easy to cause water loss of cold storage; the evaporation exhaust pipe made of seamless steel tube is mainly selected for the medium and low-temperature cold storage, which is characterized by good thermostatic effect and timely cold storage.
Condenser: the condenser has air cooling, water cooling and air and water combined cooling mode. Air cooling is limited to small-scale cold storage equipment, and water-cooled condenser can be used in all forms of refrigeration system.
Thermal expansion valve: the thermal expansion valve is divided into internal balance expansion valve and external balance expansion valve. The inlet pressure of evaporator is felt under the membrane of internal balance expansion valve, while the outlet pressure of evaporator is felt under the membrane of external balance expansion valve.
Liquid storage tank: store freon to ensure that the refrigerant is always saturated.
Solenoid valve: prevent the high-pressure refrigerant liquid from entering the evaporator when the compressor is stopped, avoid the high-pressure low pressure when the compressor is started next time, and prevent the liquid hammer of the compressor. In addition, when the cold storage temperature reaches the set value, the temperature controller acts, the solenoid valve loses power, and the compressor stops when the low-pressure pressure reaches the shutdown set value. When the temperature in the cold storage rises to the set value, the temperature controller acts, the solenoid valve is powered on, and the compressor starts when the low-pressure pressure rises to the startup set value of the compressor.
High and low pressure protector: protect the compressor from high pressure, high pressure, low pressure and low pressure.
Temperature controller: it is equivalent to that the brain controls the start and stop of refrigeration, defrosting and fan.
Dry filter: filter impurities and moisture in the system.
Oil pressure protector: ensure that the compressor has enough lubricating oil.
Oil separator: its function is to separate the lubricating oil in the high-pressure steam discharged from the refrigeration compressor, so as to ensure the safe and efficient operation of the device. According to the principle of oil separation, which can reduce the velocity of air flow and change the direction of air flow, the oil particles in high pressure steam can be separated under the action of gravity. Generally, when the air velocity is less than 1 m / s, the oil particles with a diameter of more than 0.2 mm in the steam can be separated. The commonly used oil separators are washing type, centrifugal type, packing type and filter type.
Evaporator pressure regulating valve: to prevent the evaporator pressure (and evaporation temperature) from falling below the specified value. Sometimes it is also used to adjust the pressure of evaporator to the force to adapt to the change of load.