Heat exchanger with optimized pressure loss

Abstract

The invention relates to a heat exchanger, in particular for the refrigerant circuit of a motor vehicle. The heat exchanger is formed of interconnected rectangular plates. Channels are formed between the plates. Two heat exchanging media flow alternately through the channels formed in this way via at least one inflow opening and at least one outflow opening. The plates have profiles. Contact points are formed between the plates. The plates are connected to each other at said contact points. Flow paths of the two media from the corresponding inflow port to the corresponding outflow port are formed in this way. The flow has a main flow direction. The profiles of the plates as well as their contact points are shown such that the profiles run essentially along the main flow direction of the flow formed between the plates.

1 . A heat exchanger, in particular for the refrigerant circuit of a motor vehicle, the heat exchanger, comprising a plurality of is formed from plates which are connected to one another, wherein channels are formed between the plates, two heat exchanging media flow alternately through the channels via at least one inflow opening and at least one outflow opening, wherein the plates have profiles, such that contact points are formed between the plates, at which contact points the plates are connected to one another, such that flow paths of the two media are formed from the respective inflow opening to the respective outflow opening, wherein the flow has a main flow direction, wherein the profiles of the plates and their contact points are disposed such that the profiles run essentially along the main flow direction of the flow which is formed between the plates. 
     
     
         2 . The heat exchanger according to  claim 1 , wherein the plates alternately and respectively have a profile differing from the adjacent plates, wherein the profiles run in a curved manner, in particular having waves along the extension direction. 
     
     
         3 . The heat exchanger according to  claim 1 , wherein the profile of the plates between straight sections has a tip angle (α) that reoccurs at a predetermined division such that the profile is described by the division, an amplitude, a wavelength, the tip angle (α), wherein the profile has a radius at the tip. 
     
     
         4 . The heat exchanger according to  claim 1 , wherein, the profile of the plates has at least one division, wherein the number of divisions depends on the length of the plate, such that the longer the plate, the smaller the number of divisions. 
     
     
         5 . The heat exchanger according to  claim 1 , wherein, the profile forms a first plate, and the profile is respectively arranged symmetrically with respect to the transverse axis and longitudinal axis of the plate. 
     
     
         6 . The heat exchanger according to  claim 1 , wherein, the profile forms a second plate, the second plate is shifted in the direction of the transverse axis by at most half the wavelength compared to the first plate. 
     
     
         7 . The heat exchanger according to  claim 1 , wherein the profile forms a third plate, the third plate is rotated by 180° about the vertical axis of the plate compared to the first plate, wherein the profile is shifted in the direction of the transverse axis. 
     
     
         8 . The heat exchanger according to  claim 2 , wherein, the heat exchanger is formed of the plurality of plates that are stacked together, wherein both types of plates are arranged always alternately one above another. 
     
     
         9 . The heat exchanger according to  claim 1 , wherein, the amplitude of the profile of each of the plurality of plates is between 1.0 to 3.5 mm. 
     
     
         10 . The heat exchanger according to  claim 1 , wherein, the wavelength of the profile of the plurality of plates is between 2.0 and 9.0 mm. 
     
     
         11 . The heat exchanger according to  claim 3 , wherein, the tip angle (α) between the straight sections of the profile is preferably between 90° and 180°. 
     
     
         12 . The heat exchanger according to  claim 1 , wherein, the inflow opening for the inflow, and the outflow opening for the outflow of the first medium, are at least a factor of 10 larger than the inflow opening for the inflow and the outflow opening for the outflow of the second medium. 
     
     
         13 . The heat exchanger according to  claim 1 , wherein, the plates between the inflow openings and outflow openings, respectively, have an additional profile, in particular a straight profile, resulting in additional contact points between the plates at which the plates are connected. 
     
     
         14 . The heat exchanger according to  claim 1 , wherein, the plates are made of a metallic material, in particular aluminum. 
     
     
         15 . The heat exchanger according to  claim 1 , wherein, the plates are connected at the contact points, preferably by material bonding, in particular by brazing. 
     
     
         16 . A method for producing a heat exchanger, in particular according  claim 7 , the method comprises, embossing the plurality of plates, stacking the plates one on top of the other, and joining the plates to one another with a material bond, in particular brazing. 
     
     
         17 . The method according to  claim 16 , wherein the first type of plate is always arranged alternately with the other type of plate or plate on top of each other. 
     
     
         18 . A refrigerant circuit, preferably for a motor vehicle, having a condenser, an evaporator, an expansion mechanism, at least one heat exchanger, the connecting pipes, wherein the heat exchanger is designed according to  claim 1 . 
     
     
         19 . A heat exchanger, in particular an internal heat exchanger for a motor vehicle, preferably an oil cooler, wherein the heat exchanger is designed according to  claim 1 .