High temperature, medium temperature, low temperature refrigerant USES is introduced

a, low-pressure high-temperature refrigerant

condensing pressure Pk 2 ~ 3 kg/cm (or less Absolute) , evaporation temperature T0 & gt; 0℃。 Such as the R11 ( 11, freon CFCL3 T0 = 23. 7℃) R21,? The T0 = 23. 7℃。 This kind of refrigerant applies to air conditioning system of centrifugal compressor. Usually at 30 ℃, Pk 3 or less. 06kg/cm.

2, medium pressure medium temperature refrigerant

condensing pressure Pk 20 kg/cm (or less Absolute) ,0℃> T0> - 60℃。 Such as R717 ( Ammonia, NH3) 、R12、R22( Freon 22, CHCLF2, two fluorine monochloro methane) ，R502( A azeotropic refrigerants of R22 and R115 ( Five fluorine chloroethane, C2F5CL) ). And so on, this kind of refrigerant is commonly used in ordinary single-stage compression and two-stage compression piston type refrigeration compressor.

three, high pressure low temperature refrigerant

a condensing pressure Pk 20 kg/cm (or Absolute) T0≤- 70℃。 Such as R23 ( Freon 23, CHF3, trifluoro methane), ，R13( CF3CL) 、R14( CF4) , carbon dioxide ( CO2) , R503, ethane, ethylene, etc. , this kind of refrigerant is suitable for low temperature part of the cascade refrigeration equipment or - Device at low temperature below 70 ℃.

so according to the above refrigerant USES, - 70 ℃ low temperature test chamber, hot and cold impact test chamber, temperature test chamber, high temperature parts used in temperature refrigerant ( r404a) Low temperature, low temperature partially used refrigerants ( R23) 。

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