Sale Shanghai Tofflon used freeze-drying machine lowest price Used 8 -30 square square cold ..

Works will be cooled to a temperature below the water vapor in the air condenses into water that is. The condensate exclude reheating can get low air humidity. Cooling air source can be used refrigerant freezers, ice or brine, modern refrigeration dehumidifier usually frozen dehumidifier special compression mechanism. High standard refrigerator freezer dehumidifier principle humidity concepts. Single-stage refrigeration cycle system single stage chiller is used widely as a class of refrigerator, it can be applied aspects of the system, air conditioning, refrigeration and industrial food production processes. Single-stage refrigeration cycle refers to the refrigerant in the refrigeration system have been compressed, condensed, throttling, four evaporation process, will complete the single stage chiller cycle, which reached a refrigeration purposes. Cooling system consists of an evaporator, a single-stage compressor, oil separator, a condenser, ammonia storage device, the ammonia liquid separator, throttle and other ancillary equipment, etc., with each other through a closed pipe system connected into. Wherein the evaporator is cold conveyance device, the heat absorbed by the cooling of refrigeration objects after the liquid refrigerant is evaporated; the compressor is the heart of the system, plays a suction, compression, transport refrigerant vapor action; oil separator for sedimentation separating the compressed refrigerant vapor in the oil; condenser compressor discharge refrigerant vapor is condensed to become high-temperature saturated liquid; reservoir unit for storing ammonia in the condenser, the condensed refrigerant liquid ammonia to adjust between the condenser and the evaporator supply and demand of the refrigerant liquid ammonia; ammonia liquid separator systems for liquid ammonia gravity of the important ancillary equipment; throttle the refrigerant from throttling effect at the same time to control and regulate the flow of the refrigerant flowing into the evaporator liquid, and the system is divided into high and low side in two parts. Two-stage refrigeration cycle system two-stage refrigeration cycle is developed on the basis of a single-stage refrigeration cycle, the compression process is divided into two stages, the refrigerant vapor from the evaporator into the low pressure stage first cylinder is compressed to an intermediate pressure, through an intermediate cool before entering the high pressure stage cylinders, compressed to the condensing pressure entering the condenser. Usually the evaporation temperature at -25 ℃ ~ -50 ℃, should use the two-stage compressor for cooling. By the refrigeration system evaporator, two-stage compressor, oil separator, a condenser, an intercooler, ammonia storage device, the ammonia liquid separator, throttle valve, and other ancillary equipment, etc., with each other via a closed pipe system is connected to . Among them, the intercooler with a small amount of liquid refrigerant absorbs heat of vaporization at the intermediate pressure, superheated steam discharged from the low-pressure stage is cooled to reduce the high pressure stage of the intake air temperature, but also the high-pressure liquid refrigerant cooled cold. Operating principle refrigerant enters the condenser coil temperature gaseous refrigerant passes through the coil wall and the outer coil spraying water and air for heat exchange, the temperature of the refrigerant gas in the tube as time lengthened decline, becoming the gaseous liquid. Fans for super wind, the shower water to adequately cover the outer surface of the coil, thereby increasing the heat transfer efficiency. After spraying water and air to absorb heat coil wall temperature rises, some of the water from liquid into gas, took a lot of heat on the wall, heat moisture in the air is introduced into the flap stopped PVC heat exchange layer hot air exhaust. PVC heat exchange layer of water is flowing through the fresh air cooling, the temperature decreases, flow into the sump, and then from the pump into the sprinkler system, the cycle continues. Lost to the moisture in the air is automatically adjusted by the level control device to add. Workflow industrial chillers operating system is the system through three interrelated: a refrigerant circulation system, water system, electrical automatic control system. Heat refrigerant cycle system evaporator liquid refrigerant to absorb water and begin to evaporate, and the water of the final formulation