Discharge tube refrigerator defrosting Another problem is how to control the defrost time, the defrost time is short, the fin surface residual moisture, the next heating period, the fin surface water quickly freezes, the unit heating deterioration of performance, so that the mass flow rate of the system increases rapidly, if the defrosting time is too long, the system condensing pressure rises, and even cause high voltage protection, so before the end of the defrosting operation, start the fan in advance, you can make the residual water on the fins quickly taken away by air, but also reduces the suction and discharge pressure fluctuation cycle at the start of a heating, when to start the fan, according to the exhaust pressure may be. Hot fluorine defrosting (manual): The device is developed according to the principle of a simple heat-fluoro-defrost defrost device. It is now being widely applied to industrial and refrigerated ice refrigeration industry. N does not need to install a solenoid valve. Suitable for single compressor, circulating system-independent evaporator. Does not apply to parallel, multi-stage cascade unit. Refrigeration industry 20 square meters to 800 square meters sized refrigerator row defrosting, ice industrial equipment, the effect of combining two rows of finned aluminum, defrost the best results. Features: (1) Manual control of a key switch, simple, reliable and secure from misuse cause equipment failure. (2) from internal heating, the frost melts and wall junction to fall, high heat efficiency. (3) defrosting thoroughly clean the frost layer is solid drop more than 80 percent, with 2 aluminum evaporator fins row is better. (4) Figure directly mounted on the condensing unit, a simple pipe connections, no additional special accessories. (5) The actual difference frost layer thickness, usually with 30 to 150 minutes. (6) with electric defrost ratio, high safety factor, a small negative impact on inter-cold temperature, the water less inventory and packaging with minimal impact.