Heat exchanger with cold reservoir

Abstract

The invention relates to a heat exchanger, in particular, an evaporator ( 1 ), in particular for a motor vehicle air-conditioner, with a number of closely arranged refrigerant tubes and at least one cold reservoir ( 4 ), in which a refrigerant medium is provided. The evaporator ( 1 ) comprises two parallel regions ( 1 ′ and 1 ″) running across the total width, the first region ( 1 ′) corresponding to a conventional evaporator in design, the cold reservoir ( 4 ) being arranged in a separate second region ( 1 ″), through which at least a partial flow of refrigerant can flow which also flows through at least a part of the first region ( 1 ′) and the first and the second region are connected to each other by at least one overflow opening ( 13 ).

1 . A heat exchanger, in particular an evaporator, in particular for a motor vehicle air conditioning system having a plurality of mutually adjacent, refrigerant-carrying tubes and having at least one cold store, in which a cold storage medium is provided, wherein the evaporator has two mutually parallel regions extending over the entire width, wherein the first region corresponds in its structure to a conventional evaporator, the cold store is disposed in an independent second region, which can be flowed through by at least a part of the refrigerant flow, and the first and the second region are connected to each other by at least one overflow opening. 
   
   
       2 . The heat exchanger as claimed in  claim 1 , wherein two overflow openings are provided. 
   
   
       3 . The heat exchanger as claimed in  claim 1 , wherein in at least one cold storage element there is disposed at least one refrigerant-carrying tube. 
   
   
       4 . The heat exchanger as claimed in  claim 1 , wherein the tube which carries the refrigerant and/or contains the cold storage medium is a double-walled flat tube, the refrigerant being located in the central region and the cold storage medium in the outer region. 
   
   
       5 . The heat exchanger as claimed in  claim 1 , wherein the refrigerant-carrying tubes of the second region end in a reservoir, which is configured separate from and only by one or more overflow openings to a reservoir of the first region. 
   
   
       6 . The heat exchanger as claimed in  claim 1 , wherein the tubes or channels carrying cold storage medium end in a cold storage medium reservoir, through which the refrigerant-carrying tubes or channels project, which end in a separate reservoir. 
   
   
       7 . The heat exchanger as claimed in  claim 1 , wherein the first region has, in the direction of its width adjacent to the second region, a number of blocks which can be flowed through in different direction by the refrigerant, and the second region has at least one block, in particular a number of blocks which can be flowed through in different direction by the refrigerant, and the number and/or width of the individual blocks in the latitudinal direction of the evaporator differs in the first region and in the second region. 
   
   
       8 . The heat exchanger as claimed in  claim 7 , wherein the first region has directly adjacent to the second region two to four, in particular three blocks, and the second region has one to six blocks, in particular two to four blocks. 
   
   
       9 . The heat exchanger as claimed in  claim 1 , wherein the phase change temperature of the cold storage medium lies within a range from 0° C. to 30° C., preferably 1° C. to 20° C., in particular from 2° C. to 15° C., in particular preferably from 4° C. to 12° C. 
   
   
       10 . The heat exchanger as claimed in  claim 1 , wherein in the cold store there is disposed at least one inlay. 
   
   
       11 . An air conditioning system with cold store, in particular for a motor vehicle, having a refrigerant circuit, characterized by an evaporator according to  claim 1 .