Compression Device for Gaseous Media

Abstract

The invention concerns a device for compressing gaseous media comprising at least one compression chamber ( 10 ) into which the gaseous medium can enter and from which the gaseous medium can exit, and comprising a first valve device ( 13, 7 ) having at least one first opening ( 13 ) and at least one first covering device ( 7 ) that essentially covers the first opening at least intermittently. The first valve device permits the gaseous medium to enter the compression chamber ( 10 ) and prevents, in essence, the gaseous medium from exiting the compression chamber ( 10 ). The inventive device also comprises a second valve device ( 4, 8 ) having at least one second opening ( 4 ) and at least one second covering device ( 8 ) that essentially covers the second opening at least intermittently. The second valve device permits the gaseous medium to exit the compression chamber ( 10 ) and prevents, in essence, the gaseous medium from entering the compression chamber ( 10 ). To this end, the narrowest free cross-section of one valve device considerably exceeds the narrowest free cross-section of the other valve device.

1 . A device for compressing gaseous media, comprising
 at least one compression space into which the gaseous medium can enter and from which the gaseous medium can discharge;
 a first valve means having at least one first opening and at least one first covering means essentially covering the first opening at least intermittently, the first valve means allowing the gaseous medium to enter the compression space and essentially preventing a discharge of the gaseous, medium from the compression space; 
 a second valve means having at least one second opening and at least one second covering means essentially covering the second opening at least intermittently, the second valve means allowing a discharge of the gaseous medium from the compression space and essentially preventing the gaseous medium from entering the compression space; 
 wherein the narrowest free cross section of one valve means considerably exceeds the narrowest free cross section of the other valve means. 
   
   
   
       2 . The device as claimed in  claim 1 , wherein the narrowest free cross section of the first valve means considerably exceeds the narrowest free cross section of the second valve means. 
   
   
       3 . The device as claimed in  claim 1  wherein the narrowest free cross section of the one valve means exceeds the narrowest free cross section of the other valve means at least by a factor of 2. 
   
   
       4 . The device as claimed in  claim 1  wherein the device has a piston means arranged so as to be movable relative to the compression space. 
   
   
       5 . The device as claimed in  claim 1  wherein at least one covering means is designed as a reed. 
   
   
       6 . The device as claimed in  claim 1  wherein at least one valve means is arranged in a valve plate, and preferably both valve means are arranged in said valve plate. 
   
   
       7 . The device as claimed in  claim 1  wherein the first opening of the first valve means is designed to be noncircular. 
   
   
       8 . The device as claimed in  claim 1  wherein the first valve means has a plurality of first openings. 
   
   
       9 . The device as claimed in  claim 1  wherein the periphery of the at least one first opening of the first valve means is greater than the periphery of the at least one second opening of the second valve means. 
   
   
       10 . The device as claimed in  claim 1  wherein the at least one opening of the first valve means, compared with an imaginary circular opening which has the same cross-sectional area as the at least one first opening, has a periphery which exceeds the periphery of said imaginary circular opening by at least 10%, preferably by at least 20% and in particular preferably by at least 50%. 
   
   
       11 . The device as claimed in  claim 1  wherein at least one covering means, preferably the covering means of the first valve means, has at least one aperture. 
   
   
       12 . The device as claimed in  claim 1  wherein at least one covering means, preferably the covering means of the first valve means, has at least one projection. 
   
   
       13 . The device as claimed in  claim 1  wherein at least one covering means is fastened to the valve plate. 
   
   
       14 . The device as claimed in  claim 1  wherein the configuration of at least one covering means is adapted to the configuration of the opening assigned to this covering means. 
   
   
       15 . The device as claimed in  claim 1  wherein the peripheral margins of at least one covering means project beyond the peripheral margins of the associated opening by between 0.5 mm and 5 mm, preferably by 1 mm to 3 mm. 
   
   
       16 . The device as claimed in  claim 1  wherein at least one opening has a peripherally encircling groove. 
   
   
       17 . The device as claimed in  claim 1  wherein the valve plate has at least one surface section having a coating which is deformable at least in sections. 
   
   
       18 . The device as claimed in at  claim 1  wherein at least one covering means has at least one surface section having a coating which is deformable at least in sections. 
   
   
       19 . The device as claimed in  claim 1  wherein the coating has a material which contains Teflon. 
   
   
       20 . The device as claimed in  claim 1  wherein, in the open state of the valve, at least a section of at least one covering means is at a distance from its assigned opening which is greater than 0.5 mm, preferably greater than 1.0 mm, and in particular greater than 1.5 mm. 
   
   
       21 . The use of a device as claimed in  claim 1  in an air-conditioning system, in particular for a motor vehicle.