The evaporative condenser is the key thermal equipment in the refrigeration unit. Its functional principle is: the overheated and high-pressure refrigerant gas discharged from the refrigeration compressor in the refrigeration unit passes through the condenser tube groove to make the high-temperature gaseous refrigerant Heat exchange with spray water and air outside the pipe. After a gaseous refrigerant enters the exhaust pipe from the upper port, it gradually condenses into a liquid refrigerant from top to bottom. With the super strong wind of the fan, the water is evenly covered on the surface of the coil, which greatly improves the heat exchange effect. When the temperature rises, the spray water changes from a part to a gas state, and the latent heat of water evaporation is used to bring out a large amount of heat with the wind. The water droplets in the hot air are intercepted by an effective dehydrator, and together with the remaining hot water, they are sprinkled into the PVC shower sheet for heat exchange. The layer, cooled by the flowing air, lowers the temperature, enters the water tank, and circulates again through the circulation pump. The water evaporates in the air and is automatically replenished through the water level regulator.
There are many forms of heat exchanger tubes, the common ones are carbon steel hot-dip galvanized tubes (also can be divided into round steel tubes and stainless steel round tubes), aluminum alloy tubes, stainless steel tubes (also divided into 314/316 round tubes, among them, carbon steel hot-dip galvanized tubes The galvanized evaporative condenser is a product that has just started to be used. It occupies the majority of users in China. It is mainly used for high-pressure gas condensation and cooling. The applicable pressure range is between 0-30MPa; the aluminum alloy condenser is a new generation of environmentally friendly and energy-saving condensation Commodity, suitable for condensation of refrigerant ice machine, can be applied in the pressure range of 0~5MPa; stainless steel tube evaporative condenser is mainly used for cooling and condensation of corrosive gases in chemical plants.
The shell of the refrigeration evaporative condenser is generally made of hot-dip galvanized sheet with electrostatic spraying, because it is not anti-corrosion, and gradually chooses the electrostatic spraying of galvanized sheet. The market uses aluminum-magnesium-zinc sheet. Features, no rust, easy to process.
Operating principle
This kind of water spray is to send the water in the sump to the spray pipe on the top of the evaporative condenser through the pump, and spray it to the surface of the condensing pipe through the nozzle to form a thin water film, and a part of the water in the water film is evaporated into The water vapor is then used for water pump recycling.
The air inhaled by the upper end and lower end wall of the axial flow fan passes through the coil, and the filler and saturated hot humid air are discharged into the surrounding atmosphere; part of the droplets entrained in the hot and humid air are intercepted by the water eliminator, which effectively suppresses the droplets. The foam is lost; in the system, it is controlled by the float valve, and the water vapor in the atmosphere is lost to supplement the cooling.