Dimensionally-Optimized Device For The Exchange Of Heat And Method For Optimisation Of The Dimensions Of Devices For The Exchange Of Heat

Abstract

The invention relates to a device for the exchange of heat, in particular, for a motor vehicle, comprising a number of flow tubes for the transport of a fluid, whereby the device has a given depth (T) and, at least in sections, some flow tubes are arranged at a given separation from each other, whereby the depth and the given separation are in a ratio (V) to each other.

1 . A heat-exchanging device for an air-conditioning system, in particular for a motor vehicle, having a plurality of throughflow tubes for conveying a fluid, with the device having a predefined depth T and a predefined number of throughflow tubes are arranged at least in sections with a predefined spacing to one another, wherein the ratio V between the depth and the predefined spacing is less than 7 and/or the weighted ratio V′ between the depth and the sum of the predefined spacing and 10 mm is greater than 1.3 and less than 2.8.  
   
   
       2 . The device as claimed in  claim 1 , wherein the predefined spacing is less than or equal to 9 mm, preferably less than or equal to 8 mm and preferably less than or equal to 6 mm.  
   
   
       3 . The device as claimed in  claim 1 , wherein the ratio V is less than 6.8, preferably less than 6.6 and preferably less than 6.3.  
   
   
       4 . The device as claimed in  claim 1 , wherein the ratio V is less than 6.1, preferably less than 5.9 and preferably less than 5.1.  
   
   
       5 . The device as claimed in  claim 1 , wherein the weighted ratio V′ is at least 1.5, preferably at least 1.85 and preferably at least 2.2.  
   
   
       6 . The device as claimed in  claim 1 , wherein the weighted ratio V′ is at most 2.6, preferably at most 2.4 and preferably at most 2.25.  
   
   
       7 . The device as claimed in  claim 1 , wherein the throughflow tubes are arranged parallel to one another at least in sections.  
   
   
       8 . The device as claimed in  claim 1 , wherein the throughflow tubes have a substantially constant predefined first spacing to one another.  
   
   
       9 . The device as claimed in  claim 1 , wherein the throughflow tubes have a flat-tube-shaped cross section.  
   
   
       10 . The device as claimed in  claim 1 , wherein the throughflow tubes are formed in one piece, in particular from a single sheet metal strip or extruded profile.  
   
   
       11 . The device as claimed in  claim 1 , wherein the throughflow tubes and preferably the device have a rupture pressure of over 90 bar.  
   
   
       12 . The device as claimed in  claim 1 , wherein the fluid is a refrigerant and is preferably R 744 (CO 2 ).  
   
   
       13 . The device as claimed in  claim 1 , wherein a first plurality of throughflow tubes have a first predefined spacing to one another at least in sections, a second plurality of throughflow tubes have a second predefined spacing to one another, and the ratio V between the depth and at least one of the predefined spacings is less than 7.  
   
   
       14 . The device as claimed in  claim 1 , wherein a first plurality of throughflow tubes is laterally offset with respect to a second plurality of throughflow tubes.  
   
   
       15 . The device as claimed in  claim 1 , wherein cooling fins are arranged between the throughflow tubes.  
   
   
       16 . The device as claimed in  claim 1 , wherein said device has a depth of between 10 mm and 60 mm, preferably between 20 mm and 50 mm, and particularly preferably between 25 mm and 45 mm.  
   
   
       17 . The device as claimed in  claim 1 , wherein said device the predefined spacing is between 4 mm and 12 mm, preferably between 4.5 mm and 10 mm.  
   
   
       18 . The device as claimed in  claim 1 , wherein a depth of between 30 mm and 50 mm, preferably a depth of between 35 mm and 45 mm is assigned a predefined spacing of between 5 mm and 12 mm, preferably between 5.5 mm and 10 mm.  
   
   
       19 . The device as claimed in  claim 1 , wherein a depth of between 20 mm and 35 mm, preferably a depth of between 25 mm and 30 mm is assigned a predefined spacing of between 3 mm and 10 mm, preferably between 4 mm and 8 mm.  
   
   
       20 . The device as claimed in  claim 1 , wherein the throughflow tubes have a width of between 1 mm and 3 mm, preferably between 1.3 mm and 2 mm and particularly preferably from approximately 1.4 mm to 1.9 mm.  
   
   
       21 . The device as claimed in  claim 1 , wherein the throughflow tubes have a wall thickness of between 0.1 mm and 0.6 mm, preferably of between 0.2 mm and 0.4 mm and particularly preferably of approximately 0.25 mm to 0.3 mm.  
   
   
       22 . The device as claimed in  claim 1 , wherein the device is an evaporator.  
   
   
       23 . An air-conditioning system, in particular for a motor vehicle, wherein said air-conditioning system has at least one heat-exchanging device as claimed in  claim 1 .  
   
   
       24 . A method for dimensioning heat-exchanging devices, having the following steps: 
 specifying a first dimension of the device;    specifying a second dimension of the device;    determining at least two first target parameters of the device;    varying at least one dimension;    determining at least two second target parameters of the device with the varied dimension;    determining the more favorable target parameters by comparing the first and second target parameters.    
   
   
       25 . The method as claimed in  claim 24 , wherein the dimensions are selected from a group of dimensions which contains the depth, the fin height and the spacing of the throughflow tubes.  
   
   
       26 . The method as claimed in  claim 24 , wherein the parameters are selected from a group of parameters which contains the installation space depth, the refrigerating capacity, the volume flow rate, the air-side pressure drop, the weight and the production costs.  
   
   
       27 . The method as claimed in  claim 24 , wherein the target parameters are determined multiple times and, from the sets of target parameters which are determined in this way, the most favorable sets of parameters are determined.  
   
   
       28 . The method as claimed in  claim 24 , wherein in the determination of the most favorable target parameter sets, the individual target parameters are weighted according to predefined criteria.