The refrigerant cycle system: evaporator liquid refrigerant absorbs heat and water begins to evaporate, forming between the refrigerant and the water temperature difference between certain refrigeration equipment maintenance, the liquid refrigerant has completely evaporated into gas, after the compressor suction and compression (increased pressure and temperature) used refrigeration equipment, the gas refrigerant releases heat through the condenser, condenses into a liquid. Through the expansion valve (or capillary tube) after throttling into low temperature low pressure refrigerant into the evaporator, the refrigerant to complete the cycle. 2, cleaning services program air system: 2.2 cleaning and disinfection programs: ① various types of filter cleaning: including new air handling units, air conditioning units, fan coil intake and return air filter. ② air conditioning equipment inside cleaning: Regular flushing fresh air unit, air conditioning units, fan coil fin coils, condensate drain pan, inside the box is too downwind of industrial refrigeration equipment, into the duct to reduce harmful substances. ③ The "robot" duct cleaning technology, within the wind pipe be thoroughly cleaned. ④ other can filter replacement in accordance with the actual situation in effect, circulating air system add shielded UV sterilizer. Refrigeration Equipment Co. _ XUELONG refrigeration (certified) _ refrigeration equipment provided by the Dongguan City-long Refrigeration Electrical and Mechanical Equipment Engineering Co., Ltd .. Dongguan City-long Refrigeration Electrical Equipment Engineering Co., Ltd. (www.dgxuelong.com) is Dongguan, heat, refrigeration and air conditioning equipment leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum meet customer needs. In the Snow Dragon refrigeration leadership with the staff warmly welcome all inquiries negotiations to create a better future XUELONG refrigeration.