Tubular heat exchanger for motor vehicle air conditioners

Abstract

A tubular heat exchanger is provided for a motor vehicle air conditioner with an inner tube through which a fluid or gas can flow and an outer tube radially enclosing the inner tube subject to the formation of an intermediate space through which a flow can flow. The inner tube in this case includes, but is not limited to a quantity of stampings arranged spaced from one another and with their longitudinal extension at least partially extending in axial direction of the inner tube.

1 . A heat exchanger for a motor vehicle air conditioner, comprising:
 an inner tube adapted to receive a flow of a fluid;   an outer tube radially enclosing the inner tube and subject to a formation of an intermediate space; and   a plurality of stampings spaced apart from one another with a longitudinal extension extending at least partially in axial direction of the inner tube.   
     
     
         2 . The tubular heat exchanger according to  claim 1 , wherein the fluid is a gas. 
     
     
         3 . The tubular heat exchanger according to  claim 1 , wherein the fluid is a liquid. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein the plurality of stampings are formed radially to an inside. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein the plurality of stampings are adapted to achieve a predetermined heat exchange between the flow in the inner tube and a second flow between the inner and the outer tube. 
     
     
         6 . The heat exchanger according to  claim 5 , wherein the plurality of stampings are adapted to achieve the predetermined heat exchange between the flow in the inner tube and the second flow between the inner and the outer tube through a quantity of the plurality of stampings. 
     
     
         7 . The heat exchanger according to  claim 5 , wherein the plurality of stampings are adapted to achieve the predetermined heat exchange between the flow in the inner tube and the second flow between the inner and the outer tube through a predetermined geometry of the inner. 
     
     
         8 . The heat exchanger according to  claim 6 , wherein the quantity of the plurality of stampings is approximately four to twelve and the plurality of stampings are arranged on an imaginary circumferential line running substantially perpendicularly to a longitudinal axis of the inner tube is 4 to 12. 
     
     
         9 . The heat exchanger according to  claim 1 , wherein the plurality of stampings are arranged in axial direction adjacently to one another have a spacing of at least approximately 15 mm to approximately 30 mm. 
     
     
         10 . The heat exchanger according to  claim 1 , wherein a depth of the plurality of stampings is between approximately 1 mm and approximately 3 mm. 
     
     
         11 . The heat exchanger according  claim 1 , wherein a depth of the plurality of stampings is a maximum of approximately 15% of a diameter of the inner tube. 
     
     
         12 . The heat exchanger according to  claim 1 , wherein a sum of areas of all the plurality of stampings is between approximately 10% and approximately 60% of and outer surface area of the inner tube. 
     
     
         13 . The heat exchanger according to  claim 1 , wherein the plurality of stampings comprise a substantially rectangular geometry and a longitudinal axis extending at an angle of approximately 0° to approximately +/−45° relative to an inner tube longitudinal axis of the inner tube. 
     
     
         14 . The heat exchanger according to  claim 1 , wherein the plurality of stampings widen in a circumferential flow direction. 
     
     
         15 . The heat exchanger according to  claim 1 , wherein the plurality of stampings in a flow direction follow a curved course. 
     
     
         16 . The heat exchanger according to  claim 1 , wherein the plurality of stampings are substantially triangular. 
     
     
         17 . A motor vehicle air conditioner, comprising:
 a compressor;   a condenser;   an expansion device;   an evaporator;   a closed refrigerant circuit fluidically interconnecting the compressor, the condenser, the expansion device and the evaporator; and   a heat exchanger comprising:
 an inner tube fluidically interconnecting the evaporator with the compressor; 
 an outer tube radially enclosing the inner tube and subject to a formation of an intermediate space and fluidically interconnected to the condenser and the expansion device by the inner tube; and 
   a plurality of stampings spaced apart from one another with a longitudinal extension extending at least partially in axial direction of the inner tube.   
     
     
         18 . The motor vehicle air conditioner according to  claim 17 , wherein the plurality of stampings are formed radially to an inside. 
     
     
         19 . The motor vehicle air conditioner according to  claim 17 , wherein the plurality of stampings are adapted to achieve a predetermined heat exchange between a flow in the inner tube and a second flow between the inner and the outer tube. 
     
     
         20 . The motor vehicle air conditioner according to  claim 19 , wherein the plurality of stampings are adapted to achieve the predetermined heat exchange between the flow in the inner tube and the second flow between the inner and the outer tube through a quantity of the plurality of stampings.