Refrigerator defrost you know several air cooler?

artificial and frost: operator tool to remove hand directly on the surface of the evaporator to remove coagulate frost said artificial cream. Generally applies only to freezing cold storage wall exhaust pipe and exhaust pipe defrosting. Freeze refrigerated room are long-term inventory of refrigerating room, exhaust pipe in the surrounding the cargo at the top or close to, if use hot gas defrosting or electric heating defrosting, the melting of the cream will not only make the goods be affected with damp be affected with damp, also the item the stick into pieces, and library temperature recovery in food storage quality, can be damaging to congelation refrigeration row between the tube is so unfavorable adopted the practice of 'harmony' frost defrost, more do not allow water frost. Artificial and frost is the feature of cream does not melt, in the process of defrosting evaporator can still work, basic does not affect the warehouse temperature constant, so suitable for freezing refrigeration row tube defrost. But when defrosting personnel will enter the rolls operation, poor working conditions, and to increase the heat of cold consumption and Labour cost.

artificial defrost, also have a balance problem of artificial cost and operation cost. Since the variety of the refrigeration plant is stored goods are different, the packing is different also, exhaust pipe of the frosting rate difference is very big, so artificial defrost intervals can only according to their own specific circumstances to determine, science, it is the frost layer thickness for the operation of the system increase electricity and comprehensive analysis and comparison of deicing labor to set a reasonable economic defrost cycle. Specific analysis of the idea is in a reasonable defrosting cycle frost layer thermal resistance caused by the additional operating cost accumulation number is equal to a defrosting of labor.

glycol frost: cold storage with hot ethylene glycol frost way, using the compressor exhaust heat through the heat exchanger heat glycol and saved into the storage tanks, and through the pump into the need to defrost ( Cooling fan, LvPai tube) Evaporator, at the same time, normal for the night, the liquid valve closed. When the evaporator temperature, the evaporator surface frost layer melts or peeling; Cold storage is hot gas defrosting ways, it will compressor discharge high-temperature high-pressure gas into the evaporator to heat defrost, this way of defrosting economic, reliable and convenient maintenance and management, but also the investment and construction difficulty.

electric defrost: electric defrost is the use of cooling fan configuration in the electric heating tube of finned heat melted the frost layer. This kind of method system is simple, operation is more convenient, but the air cooler to each square heat exchange area of about 40 ~ 100 w electric heating tube, power consumption is too big, influence on library temperature fluctuation is very big also, energy saving; Defrost electric heating tube power is very big, the quality of the heating tube is bad or use time is long, easy to burn out or even cause fire, electric defrost there are serious security hidden danger.

water defrosting: water frost is the use of the water pump or hydraulic device to the external surface of the evaporator, the frost layer heat melt and washed away by water. Water frost, simple operation, short time, it is a very effective defrosting method. Within the low temperature cold storage, after repeated impact frost, the water temperature is too low, can affect gas defrosting effect; If there is no frost in the set time rush clean, after the normal work of the air cooler, may become ice cream layer, make it more difficult to gas defrosting next time.

hot working medium defrosting: hot working medium defrosting is the use of superheated refrigerant compressor discharge with high temperature steam, after the oil separator, into the evaporator, will be temporarily as a condenser, evaporator with hot working substance that is released by condensation heat, melt the frost layer on the surface of the evaporator. Refrigerant and lubricant of evaporator in the original deposited at the same time, with the help of hot working medium pressure or gravity into the defrosting drainage barrels or low pressure circulation. Hot gas defrosting, load of condenser is reduced, the operation of the condenser is also part of the electrical energy can be saved. Hot working medium, therefore, defrosting is a means of cooling fan defrosting economy.

at present, barrel pump for fluid system increase because of the many accessory equipment, and accessory equipment, increase the investment cost, is applied in large system. In most of the market, small refrigerator, using freon the advantages of easy to realize automation control, the use of direct expansion fluid and drainage for barrel on hot fluorine defrosting great promotion value.

basic principle: using freon compressor discharge of hot steam, heat defrosting of air cooler. After defrosting of freon liquid into the drainage barrels, freon pressure make the drainage the barrel again for the liquid tube in refrigeration. Defrost, drainage flow and refrigeration cycle in the same direction.

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