Vehicle air-conditioning system employing tube-fin-type evaporator using hfo 1234yf material refrigerant

Abstract

Provided is an air conditioning system with a tube-fin type evaporator which obtains optimal performance The air conditioning system with the tube-fin type evaporator using HFO 1234yf refrigerant, which has totally different physical properties from conventional refrigerant containing R-134, CO 2 or the like, has an optimal design corresponding to a physical property of the used refrigerant.

1 . An air conditioning system with a tube-fin type evaporator using HFO 1234yf refrigerant, comprising:
 a compressor;   a condenser; and   an expansion valve,   wherein the tube-fin type evaporator comprises a plurality of tubes which are arranged in parallel along an air-blowing direction to be spaced apart from each other at regular intervals; a fin which is interposed between the tubes so as to increase a heat exchange surface area with respect to air flowing between the tubes; a pair of header-tanks which are coupled to both ends of the tube so that a heat exchange medium is flowed therethrough; and at least one or more baffle which are provided at the header-tank, and   the heat exchange medium is refrigerant containing HFO 1234yf, the tube has a height of 2.489˜4.082 mm, and a flow of the heat exchange medium is divided into four passes.   
     
     
         2 . The air conditioning system of  claim 1 , wherein the tube has a height of 2.875˜3.711 mm. 
     
     
         3 . An air conditioning system with a tube-fin type evaporator using HFO 1234yf refrigerant, comprising:
 a compressor;   a condenser; and   an expansion valve,   wherein the tube-fin type evaporator comprises a plurality of tubes which are arranged in parallel along an air-blowing direction to be spaced apart from each other at regular intervals; a fin which is interposed between the tubes so as to increase a heat exchange surface area with respect to air flowing between the tubes; a pair of header-tanks which are coupled to both ends of the tube so that a heat exchange medium is flowed therethrough; and at least one or more baffle which are provided at the header-tank, and   the heat exchange medium is refrigerant containing HFO 1234yf, the tube has a hydraulic diameter of 0.780˜1.839 mm, and a flow of the heat exchange medium is divided into four passes.   
     
     
         4 . The air conditioning system of  claim 3 , wherein the tube has a hydraulic diameter of 0.946˜1.775 mm. 
     
     
         5 . An air conditioning system with a tube-fin type evaporator using HFO 1234yf refrigerant, comprising:
 a compressor;   a condenser; and   an expansion valve,   wherein the tube-fin type evaporator comprises a plurality of tubes which are arranged in parallel along an air-blowing direction to be spaced apart from each other at regular intervals; a fin which is interposed between the tubes so as to increase a heat exchange surface area with respect to air flowing between the tubes; a pair of header-tanks which are coupled to both ends of the tube so that a heat exchange medium is flowed therethrough; and at least one or more baffle which are provided at the header-tank, and   the heat exchange medium is refrigerant containing HFO 1234yf, FPDM indicating the number of fins per decimeter has a value of 63.439˜88.897, and a flow of the heat exchange medium is divided into four passes.   
     
     
         6 . The air conditioning system of  claim 5 , wherein the FPDM has a value of 65.190˜88.897. 
     
     
         7 . The air conditioning system of  claim 5 , wherein the evaporator is provided with first to fourth tube groups which are formed in a status that the baffle provided at upper and lower tanks of first and second rows is interposed among them, and the heat exchange medium passes, in turn, through the first to fourth tube groups. 
     
     
         8 . An air conditioning system with a tube-fin type evaporator using HFO 1234yf refrigerant, comprising:
 a compressor;   a condenser; and   an expansion valve,   wherein the tube-fin type evaporator comprises a plurality of tubes which are arranged in parallel along an air-blowing direction to be spaced apart from each other at regular intervals; a fin which is interposed between the tubes so as to increase a heat exchange surface area with respect to air flowing between the tubes; a pair of header-tanks which are coupled to both ends of the tube so that a heat exchange medium is flowed therethrough; and at least one or more baffle which are provided at the header-tank, and   the heat exchange medium is refrigerant containing HFO 1234yf, the tube has a height of 1.921˜3.371 mm, and a flow of the heat exchange medium is divided into six passes.   
     
     
         9 . The air conditioning system of  claim 8 , wherein the tube has a height of 2.280˜3.216 mm. 
     
     
         10 . An air conditioning system with a tube-fin type evaporator using HFO 1234yf refrigerant, comprising:
 a compressor;   a condenser; and   an expansion valve,   wherein the tube-fin type evaporator comprises a plurality of tubes which are arranged in parallel along an air-blowing direction to be spaced apart from each other at regular intervals; a fin which is interposed between the tubes so as to increase a heat exchange surface area with respect to air flowing between the tubes; a pair of header-tanks which are coupled to both ends of the tube so that a heat exchange medium is flowed therethrough; and at least one or more baffle which are provided at the header-tank, and   the heat exchange medium is refrigerant containing HFO 1234yf, the tube has a hydraulic diameter of 1.857˜3.228 mm, and a flow of the heat exchange medium is divided into six passes.   
     
     
         11 . The air conditioning system of  claim 10 , wherein the tube has a hydraulic diameter of 2.146˜3.008 mm. 
     
     
         12 . An air conditioning system with a tube-fin type evaporator using HFO 1234yf refrigerant, comprising:
 a compressor;   a condenser; and   an expansion valve,   wherein the tube-fin type evaporator comprises a plurality of tubes which are arranged in parallel along an air-blowing direction to be spaced apart from each other at regular intervals; a fin which is interposed between the tubes so as to increase a heat exchange surface area with respect to air flowing between the tubes; a pair of header-tanks which are coupled to both ends of the tube so that a heat exchange medium is flowed therethrough; and at least one or more baffle which are provided at the header-tank, and   the heat exchange medium is refrigerant containing HFO 1234yf, FPDM indicating the number of fins per decimeter has a value of 48.718˜79.211, and a flow of the heat exchange medium is divided into six passes.   
     
     
         13 . The air conditioning system of  claim 12 , wherein the FPDM has a value of 55.294˜79.211. 
     
     
         14 . The air conditioning system of  claim 12 , wherein the evaporator is provided with first to sixth tube groups which are formed in a status that the baffle provided at upper and lower tanks of first and second rows is interposed among them, and the heat exchange medium passes, in turn, through the first to sixth tube groups. 
     
     
         15 . The air conditioning system of  claim 1 , wherein the evaporator is provided with first to fourth tube groups which are formed in a status that the baffle provided at upper and lower tanks of first and second rows is interposed among them, and the heat exchange medium passes, in turn, through the first to fourth tube groups. 
     
     
         16 . The air conditioning system of  claim 3 , wherein the evaporator is provided with first to fourth tube groups which are formed in a status that the baffle provided at upper and lower tanks of first and second rows is interposed among them, and the heat exchange medium passes, in turn, through the first to fourth tube groups. 
     
     
         17 . The air conditioning system of  claim 8 , wherein the evaporator is provided with first to sixth tube groups which are formed in a status that the baffle provided at upper and lower ranks of first and second rows is interposed among them, and the heat exchange medium passes, in turn, through the first to sixth tube groups. 
     
     
         18 . The air conditioning system of  claim 10 , wherein the evaporator is provided with first to sixth tube groups which are formed in a status that the baffle provided at upper and lower tanks of first and second rows is interposed among them and the heat exchange medium passes, in turn, through the first to sixth tube groups.