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There are three types of dust-free workshop cooling
1, compression refrigeration device
Compression refrigeration devices include piston (reciprocating), centrifugal and screw type three.
The main equipment of piston (reciprocating) compression refrigeration device is piston refrigeration compressor, commonly used working medium ammonia (NH3), freon-12, 22(F-12, 22). This kind of equipment is driven by electric motor, easy to use, many varieties, complete products, can meet the requirements of various types of air conditioning cooling, and is widely used. However, a large investment, high equipment costs, large power consumption, maintenance and management is more complex.
The main equipment of centrifugal compression refrigeration unit is centrifugal refrigeration compressor, and the commonly used working medium is freon-11, 113, 114(F-11, 113, 114). The machine has the same principle as the piston type refrigeration compressor, but it only has rotary movement, stable operation than the piston type, small vibration, fewer parts, often combined with the evaporator and condenser, compact equipment and small footprint. The refrigeration capacity of centrifugal refrigeration compressor is large, so only when the cooling consumption of air conditioning is large, this type of equipment is selected.
The main equipment of screw compression refrigeration device is screw refrigeration compressor, and the commonly used working medium is freon-12, 22, ammonia (F-12, 22, R717). At present, the production of screw refrigeration compressor compared with the piston, although the efficiency is slightly lower, but because of its simple structure, small volume, high suction coefficient, low exhaust temperature, single stage compression ratio, insensitive to wet stroke, small exhaust pulsation, fewer wearing parts, long column repair cycle, cooling capacity can be stepless adjustment and other advantages, so it has been widely used in various refrigeration devices. The machine is generally used in refrigeration devices with a capacity range of (120-800)x105kJ \ h and has better technical and economic indicators.
2, absorption refrigeration device
Absorption refrigeration units use thermal energy to refrigerate. Common ammonia - water absorption refrigeration unit and water - lithium bromide solution absorption refrigeration unit. The former is suitable for low temperature freezing; The latter is suitable for air conditioning cooling, making air conditioning or process cold water above 4 ° C. The water in the lithium bromide absorption refrigeration is the working medium, and the lithium bromide aqueous solution is the absorbent. Its advantages are as follows.
It has great adaptability to the pressure of the steam heat source. When the steam pressure is 0.02-0.1mpa, a single lithium bromide absorption refrigerator can be used, and when the steam pressure is 6.0-1.0mpa, a dual-effect lithium bromide refrigerator can be used.
3, steam jet refrigeration device
Steam jet refrigeration unit is also a kind of equipment that uses heat energy to refrigerate, using water as refrigerant and steam as cooling power. Steam pressure requirements 0.2-0.8mpa, its main advantages are: equipment under vacuum, in addition to the pump, no rotating parts; The refrigerant is water, harmless to people, safe to use, easy to operate; The equipment is simple and easy to manufacture, and the general machinery factory or machine repair shop can be processed and manufactured; The equipment has a small investment and can be installed outdoors, saving civil construction costs; The waste heat in industrial enterprises or the heating boiler in industrial enterprises can be used for heating and heating in winter and steam and cooling in summer.
Industrial air conditioning, chemical fiber industrial air conditioning, chemical fiber industry refrigeration ,textile industrial air conditioning , dust-free workshop cooling, ventilation pipeline, cooling tower, freezer and other air conditioning units and accessories.
Jiangsu Jincheng Air Conditioning Engineering Co., Ltd. is a comprehensive manufacturer of special air-conditioning equipment design, production, installation, and commissioning of clean room, electricity, tobacco, civil air defense engineering, medical clean room, clean room, electricity, tobacco, civil air defense engineering, medical clean room. Mainly produce JCZK combined air conditioning unit, cooling tower, glass steel ventilated galvanized sheet pipe, stainless steel pipe, polyurethane ventilation pipe and air conditioning accessories, Jincheng air conditioner is wide, the type, the unique model, superior performance, and user Favused.
