Scroll machine and vehicle air-conditioning system

Abstract

A scroll machine is particularly suited as a scroll compressor for refrigerant in a vehicle air-conditioning system. First and second scrolls are each formed with a base plate and with a spiral wall that projects from the base plate and follows a spiral line. The spiral wall of the second scroll engages in a spiral path formed by the first scroll and the spiral walls form a number of compressor chambers. The spiral walls have respective wall surface profiles in regions on their wall surfaces, with the wall surface profile being superposed on the spiral line. As the facing wall surface profile contacts a respective other spiral wall a contact normal at a point of contact, which contact normal extends obliquely with respect to a corresponding local normal of the corresponding first or second spiral line.

1 . A scroll machine, comprising:
 a first scroll having a first base plate and a first spiral wall projecting from said first base plate, said first spiral wall following a first spiral line and forming a first spiral passage;   a second scroll having a second base plate and a second spiral wall projecting from said second base plate, said second spiral wall following a second spiral line, engaging into said first spiral passage of said first scroll, and forming a number of conveying chambers together with said first spiral wall;   said first and second spiral walls, in certain regions on an inner wall surface and an outer wall surface thereof, being formed with a wall surface profile that is superposed on the respective said spiral line and that is matched to a facing wall surface profile of the respectively opposite spiral wall, so that, during intended operation, a contact point between said mutually opposite spiral walls has a contact normal that extends obliquely relative to a corresponding local normal of the corresponding said first or second spiral line.   
     
     
         2 . The scroll machine according to  claim 1 , wherein said wall surface profile defines a type of toothing between said first spiral wall and said second spiral wall during compressor operation. 
     
     
         3 . The scroll machine according to  claim 1 , wherein the respective said wall surface profile is of continuous design. 
     
     
         4 . The scroll machine according to  claim 1 , wherein the respective said wall surface profile is formed by a superposition of the respective said spiral line with a continuous wave shape. 
     
     
         5 . The scroll machine according to  claim 4 , wherein the spiral line has a sinusoidal wave shape. 
     
     
         6 . The scroll machine according to  claim 1 , wherein said first and second scrolls are co-rotating scrolls. 
     
     
         7 . The scroll machine according to  claim 6 , wherein mutually facing wall surface profiles of said first and second spiral walls are matched to one another taking account of an orbiting radius. 
     
     
         8 . The scroll machine according to  claim 1 , wherein a radial projection of the respective said wall surface profile undershoots a ratio of a radial height thereof to an orbiting radius. 
     
     
         9 . The scroll machine according to  claim 1 , wherein, in a region of the superposed wall surface profiles, a contact region between said first and second spiral wall extends over an angular range of between zero and 30 degrees. 
     
     
         10 . The scroll machine according to  claim 9 , wherein the angular range is 15 to 20 degrees. 
     
     
         11 . The scroll machine according to  claim 1 , wherein the superposed said wall surface profiles extend over an angular range of at least 360 degrees. 
     
     
         12 . The scroll machine according to  claim 11 , wherein the superposed said wall surface profiles extend over at least 360 degrees from an inlet in a compression direction. 
     
     
         13 . The scroll machine according to  claim 11 , wherein a spiral center of said first and second spiral walls, said spiral center preferably covering an angular range of at least 90 degrees, is free from the respective said superposed wall surface profile. 
     
     
         14 . The scroll machine according to  claim 13 , wherein said spiral center covers an angular range of at least 90 degrees. 
     
     
         15 . The scroll machine according to  claim 1  configured for a refrigerant of a vehicle air-conditioning system. 
     
     
         16 . A vehicle air-conditioning system, comprising a scroll machine according to  claim 1 .