Multi-evaporation system

Abstract

Provided is a multi-evaporation system which carries out a multi-evaporation process in an air-conditioning cycle of a vehicle air conditioning system, thereby enhancing system efficiency. The multi-evaporation system includes a compressor 10 which sucks and compresses refrigerant; a condenser 20 which condenses the refrigerant compressed in the compressor 10; an expanding means 30 which receives the refrigerant condensed in the condenser 20 through an inlet port 31, branches the refrigerant into at lest two or more, discharges the refrigerant through at least two or more discharging part 32 a to 32 n, and throttles the refrigerant before or after the refrigerant is branched; and an evaporator 40 which comprises at least two or more evaporating parts 41 to 4 N so as to receive and evaporate the refrigerant discharged from the expanding means 30 and then introduce the evaporated refrigerant into the compressor 10.

1 . A multi-evaporation system, comprising:
 a compressor  10  which sucks and compresses refrigerant;   a condenser  20  which condenses the refrigerant compressed in the compressor  10 ;   an expanding means  30  which receives the refrigerant condensed in the condenser  20  through an inlet port  31 , branches the refrigerant into at lest two or more, discharges the refrigerant through at least two or more discharging part  32   a  to  32   n,  and throttles the refrigerant before or after the refrigerant is branched; and   an evaporator  40  which comprises at least two or more evaporating parts  41  to  4 N so as to receive and evaporate the refrigerant discharged from the expanding means  30  and then introduce the evaporated refrigerant into the compressor  10 ,   wherein the evaporating parts  41  to  4 N are parallelly disposed in a flow direction of air passing through the evaporating parts  41  to  4 N so that the air blown by a single blower  60  is passed through in turn the evaporating parts  41  to  4 N so as to be cooled, and   the discharging parts  32   a  to  32   n  and the evaporating parts  41  to  4 N are connected by refrigerant passages disposed in parallel.   
     
     
         2 . The multi-evaporation system of  claim 1 ,
 wherein the refrigerant which is branched and discharged from the discharging parts  32   a  to  32   n  of the expanding means  30  is supplied to the evaporating parts  41  to  4 N at the same time.   
     
     
         3 . The multi-evaporation system of  claim 2 ,
 wherein a distribution rate of the refrigerant supplied to the evaporating parts  41  to  4 N becomes higher as the evaporating parts  41  to  4 N are disposed at a more upstream side of the flow direction of the air blown from the blower  60 .   
     
     
         4 . The multi-evaporation system of  claim 1 ,
 wherein the evaporating parts  41  to  4 N are formed by dividing the evaporator  40  into at least two or more evaporating regions.   
     
     
         5 . The multi-evaporation system of  claim 1 ,
 wherein the evaporating parts  41  to  4 N are formed by dividing the evaporator  40  into two evaporating regions.   
     
     
         6 . The multi-evaporation system of  claim 1 ,
 wherein the evaporating parts  41  to  4 N are formed separately so as to be closely contacted with each other and arranged in parallel.   
     
     
         7 . The multi-evaporation system of  claim 1 ,
 wherein the expanding means  30  comprises:   an inlet passage  33  which passes the refrigerant introduced from the inlet port  31 ; and   at least two or more outlet passages  34   a  to  34   n  which are formed by dividing the inlet passage  33  into at least two or more so as to discharge the refrigerant to the discharging part  32   a  to  32   n.      
     
     
         8 . The multi-evaporation system of  claim 7 ,
 wherein the expanding means  30  comprises an expanding part before branching  35  which is provided at the inlet passage  33  so as to throttle the refrigerant,   and an expanding part  35   a  to  35   n  which is provided at the outlet passage  34   a  to  34   n  so as to throttle the refrigerant.   
     
     
         9 . The multi-evaporation system of  claim 8 ,
 wherein the expanding part before branching  35  and the expanding part  35   a  to  35   n  are respectively comprised of one selected from an expansion valve, an orifice, a capillary tube, and a reducing means.   
     
     
         10 . The multi-evaporation system of  claim 8 ,
 wherein the expanding means  30  comprises the expanding part before branching  35 , and the expanding parts provided at the outlet passages except the first outlet passage  34   a  which supplies the refrigerant to the first evaporating part  41  disposed at an uppermost stream side of the flow direction of the air blown by the blower  60 .   
     
     
         11 . The multi-evaporation system of  claim 10 ,
 wherein the expanding part before branching  35  is comprised of an expansion valve, and the expanding parts provided at the outlet passages except the first outlet passage  34   a  is comprised of one selected from reducing means comprising an orifice and a capillary tube.   
     
     
         12 . The multi-evaporation system of  claim 7 ,
 wherein the expanding means  30  is formed so that a pressure reduction value of the refrigerant supplied to the evaporating part disposed at the downstream of the flow direction of the air blown by the blower  60  is larger than that of the refrigerant supplied to the evaporating part disposed at the upstream of the air flow direction.   
     
     
         13 . The multi-evaporation system of  claim 7 ,
 wherein the expanding means  30  is formed so that a pressure reduction value of the refrigerant supplied to the evaporating part having a relatively small flow rate becomes larger.   
     
     
         14 . The multi-evaporation system of  claim 7 ,
 wherein the expanding means  30  is comprised of expanding parts  35   a  to  35   n  which are provided at the outlet passages  34   a  to  34   n  so as to throttle the refrigerant, and the expanding parts  35   a  to  35   n  are formed so that a pressure reduction level is controlled by adjusting an opening degree thereof.   
     
     
         15 . The multi-evaporation system of  claim 14 ,
 wherein the expanding means  30  is formed so that a pressure reduction value of the refrigerant supplied to the evaporating part disposed at the downstream of the flow direction of the air blown by the blower  60  is larger than that of the refrigerant supplied to the evaporating part disposed at the upstream of the air flow direction.   
     
     
         16 . The multi-evaporation system of  claim 1 ,
 further comprising an ejector  50  which is provided between the evaporator  40  and the compressor  10  so as to suck the refrigerant discharged from a part or whole of the remaining evaporating parts using a flow speed of the refrigerant discharged from a part of the first to Nth evaporating parts  41  to  4 N, raise pressure of the refrigerant and then supply the refrigerant to the compressor  10 .   
     
     
         17 . The multi-evaporation system of  claim 16 ,
 wherein the ejector  50  comprises:   a nozzle part  51  which decompresses and expands the refrigerant discharged from a part of the first to Nth evaporating parts  41  to  4 N, and increases a flow speed of the refrigerant;   a suction part  52  which sucks the refrigerant discharged from part or whole of the remaining evaporating parts using an increased flow speed of the refrigerant injected from the nozzle part  51 ; and   a diffuser part  53  which mixes the refrigerant injected from the nozzle part  51  and the refrigerant sucked through the suction part  52  and then raise pressure of the mixed refrigerant.   
     
     
         18 . The multi-evaporation system of  claim 16 ,
 wherein the ejector  50  is formed so that the refrigerant has a subsonic speed.   
     
     
         19 . The multi-evaporation system of  claim 1 ,
 further comprises a detecting means  70  which is provided at passages for connecting the expanding means  30 , the evaporator  40  and the compressor  10  so as to detect temperature and pressure of the refrigerant and control an operation of the expanding means  30 .