Energy saving refrigeration and defrosting system through 3 stage condensation heat exchangers

Abstract

The present invention relates to an energy saving refrigeration and defrosting system through 3 stage condensation heat exchangers. More specifically, the high-temperature vapor refrigerant in the refrigeration system is condensed using 3 stage condensation heat exchangers such as a tubular tube, a condensation heat exchange tank and a brine tank. This invention relates to an energy saving refrigeration and defrosting system using 3 stage condensation heat exchangers in place of a conventional refrigeration condenser.

1 . An energy saving refrigeration and defrosting system through three stage condensation heat exchangers, the system comprising:
 i) a refrigerant circulating in a refrigeration system;   ii) a refrigeration apparatus including a compressor;   iii) a three stage condensation heat exchanger including a tubular tube, a condensation heat exchange tank and a brine tank;   iv) an evaporator, having an outer surface on which frost is generated and defrosted,   v) brine circulating in a defrosting system; and   vi) a defrosting apparatus including the brine tank;   wherein said three stage condensation heat exchanger makes the refrigerant condense in normal refrigeration operation according to steps comprising:   a) supplying vapor refrigerant at a temperature of from 90 to 95° C. from the compressor,   b) cooling the vapor refrigerant to 80 to 85° C. through the tubular tube,   c) preliminarily heat exchanging and condensing the refrigerant to 50 to 60° C. in the condensation heat exchange tank, and   d) main heat exchanging and cooling the refrigerant to 35 to 40° C. in the brine tank.   
     
     
         2 . The energy saving refrigeration and defrosting system according to  claim 1 , wherein the preliminary heat exchanging between condensation heat and water is carried out in the condensation heat exchange tank, and the main heat exchanging between condensation heat and brine is carried out in the brine tank. 
     
     
         3 . The energy saving refrigeration and defrosting system according to  claim 1 , wherein said brine tank has a dual function in the refrigeration system comprising:
 i) heat exchange between the refrigerant and the brine; and   ii) conversion of remaining liquid refrigerant from the evaporator into vapor refrigerant.   
     
     
         4 . The energy saving refrigeration and defrosting system according to  claim 1 , wherein said defrosting system is operated according to steps comprising:
 a) supplying a brine pipe outside of the evaporator with heated brine from the brine tank;   b) defrosting the frost with supplied brine heat from the heated brine;   c) recovering the brine from the brine pipe into the condensation heat exchange tank;   d) preliminarily heat exchanging the recovered brine with condensation waste heat in the condensation heat exchange tank;   e) heat exchanging and storing the heated brine in the brine tank to 35 to 40° C.; and   f) repeatedly circulating the brine for operating the defrosting system.   
     
     
         5 . The energy saving refrigeration and defrosting system according to  claim 1 , wherein said brine is a mixture of water and propylene glycol (PG). 
     
     
         6 . The energy saving refrigeration and defrosting system according to  claim 1 , wherein a determination of refrigeration operation or defrosting operation is made by a processor in a control panel after processing data from sensors.