When the air conditioner is in refrigeration operation, the refrigerant gas with low temperature and low pressure is inhaled by the compressor and then pressurized to become the refrigerant gas with high temperature and high pressure. The refrigerant gas with high temperature and high pressure releases heat in the outdoor heat exchanger through the condenser (generally the air conditioner is air-cooled, that is, the copper tube of the outdoor unit), and becomes the liquid with medium temperature and high pressure (the heat is taken away through the outdoor circulating air), The liquid with medium temperature and high pressure is expanded by capillary tube to reduce pressure and then becomes the liquid with low temperature and low pressure. The liquid refrigerant with low temperature and low pressure is absorbed and evaporated by evaporator (copper tube of indoor unit) to become the gas with low temperature and low pressure (the indoor air is cooled and cooled by the surface of heat exchanger to reduce the indoor temperature). The refrigerant gas with low temperature and low pressure is inhaled by compressor, This cycle.

Generally speaking, the air conditioning refrigerant in the air conditioning system is a cycle of compression condensation expansion evaporation.

Common refrigerants: Freon R12, R22, R134a, ethylene glycol, liquid ammonia, etc

Working condition characteristics of refrigeration industry:

Gas liquid mixing, easy gasification, high pressure difference between inlet and outlet.

Different working fluids have different requirements for seal materials.

MR series Freon booster gear pumps features:

MR series Freon booster gear pumps: the flow passage parts of pump body are made of 316L precision machining and corrosion resistant.

MR series Freon booster gear pumps: the system pressure of refrigeration industry is usually 1-2.2mpa, which requires high gear. The gear shaft of Mr series Freon transmission pump adopts P + C combination, that is, ceramic shaft + imported peek gear hobbing + gear grinding + post-treatment strengthening treatment, which improves the wear resistance of gear and can effectively deal with gas-liquid mixed medium.

Mr series Freon transmission gear pump: precise control of installation clearance in the pump, strong self-priming capacity, stable delivery.

MR series Freon booster gear pumps motor selection: can be selected according to the working conditions, installation conditions, conventional motor: AC 380V ordinary frequency conversion, AC 380V explosion-proof frequency conversion, single-phase / three-phase AC, DC brushless and other options, because Freon working medium is easy to gasify, so the motor speed control is very important, usuallywe recommend customers to use adjustable speed motor.