learn about Refrigeration cycle .

Refrigeration cycle is a cyclic process is started from compressor , compressor sucking the low pressure low temperature superheated vapor from the suction line and compress it into high pressure and high temperature superheated vapors . then it may passthrough condenser and DE superheated the vapor refrigerant into the high pressure medium temperature subcooled liquid. by remove of sensible heat and latent heat by mean of air or water. under the condenser coil all refrigerant have to change subcooled liquid and it goes through slight glass and filter drier which is used for remove moisture from the refrigerant liquid. 

so filter drier filtered liquid and liquid next enter to the expansion valve, the expansion is play important role in refrigeration cycle. when liquid refrigerant enter through expansion valve it pressure drop the high pressure medium temperature subcooled liquid to low pressure low temperature saturated condition liquid and vapor. around 20 percentage of vapor and 80 percentage of liquid be after the expansion valve. finally all the saturated liquid boils of at the corresponding saturation temperature
of evaporator pressure . in evaporator the refrigerant vapor absorbs sensible heat and latent heat from the air conditioned space. and all vapor changes to superheated vapor condition, at the end of the evaporator all vapor needs completely changes to low pressure and low temperature superheated condition and vapor enter the compressor by suction. it refrigeration circulation repeated again and again