Valve Mounting Arrangement For a Refrigeration Compressor

Abstract

A valve mounting arrangement for a refrigeration compressor which presents a compression chamber closed by a valve plate having a suction orifice closed by a valve element having a mounting end portion. The mounting arrangement comprises: a first retaining means to retain the mounting end portion of the valve element inside a receiving recess of the valve plate; and at least one orientation projection carried by receiving recess and/or the mounting end portion of the valve element and to be fitted into an orientation recess in the other part; and/or a second retaining means provided between the receiving recess and the mounting end portion of the valve element, so as to avoid the latter from moving from the receiving recess before mounting the first retaining means.

1 . A valve mounting arrangement for a refrigeration compressor of the type that presents a cylinder defining, in its interior, a compression chamber having an end closed by a valve plate provided with at least one suction orifice and at least one discharge orifice, each being selectively closed by a respective valve element having a mounting end portion attached to an adjacent face of the valve plate; a bending median portion; and a sealing end portion operatively associated with the respective orifice on the valve plate, wherein it comprises:
 a receiving recess provided on the valve plate to house the mounting end portion of the valve element;   a first retaining means to be seated and secured against said adjacent face of the valve plate, in order to retain the mounting end portion of the valve element in the interior of the receiving recess; and   at least one of the parts of: at least one orientation projection carried by at least one of the parts of receiving recess of the valve plate and mounting end portion of the valve element and to be fitted into a respective orientation recess provided in the other of said parts; and   a second retaining means provided between the receiving recess and the mounting end portion of the valve element, so as to avoid the latter from moving outwardly from the receiving recess before mounting the first retaining means.   
   
   
       2 . A valve mounting arrangement for a refrigeration compressor of the type that presents a cylinder defining, in its interior, a compression chamber having an end closed by a valve plate provided with a suction orifice and a discharge orifice, each being selectively closed by a respective valve element having a mounting end portion attached to an adjacent face of the valve plate;
 a bending median portion; and   a sealing end portion operatively associated with the respective orifice on the valve plate, wherein it comprises:   a receiving recess provided on the valve plate to house the mounting end portion of the valve element, said receiving recess presenting a contour similar to and surrounding the contour of said mounting end portion, so that the latter is tightly disposed in said receiving recess;   a first retaining means to be seated and secured against said adjacent face of the valve plate, so as to retain the mounting end portion of the valve element inside the receiving recess; and   at least one of the parts of: at least one orientation projection carried by at least one of the parts of receiving recess of the valve plate and mounting end portion of the valve element and to be fitted in a respective orientation recess provided in the other of said parts; and   a second retaining means provided between the receiving recess and the mounting end portion of the valve element, so as to avoid the latter from moving outwardly from the receiving recess of the valve plate, before mounting the first retaining means.   
   
   
       3 . The arrangement, as set forth in  claim 1 , wherein the receiving recess presents a contour similar to and surrounding the contour of said mounting end portion, so that the latter is tightly disposed in said receiving recess. 
   
   
       4 . The arrangement, as set forth in  claim 2  wherein the mounting end portion is retained against lateral displacements in said seating plane, by interference, in the receiving recess of the valve plate. 
   
   
       5 . The arrangement, as set forth in  claim 1  wherein the receiving recess presents a contour coinciding with that of the respective valve element, said contour maintaining a minimum clearance from the adjacent contour of the valve element of the parts of bending median portion and sealing end portion. 
   
   
       6 . The arrangement, as set forth in  claim 1  wherein the orientation projection is defined by at least one pin projecting from the receiving recess and fitted into a respective orientation recess provided in the mounting end portion of the valve element. 
   
   
       7 . The arrangement, as set forth in  claim 6 , wherein the valve element is provided with at least one through hole to receive an orientation projection provided in the receiving recess of the valve plate. 
   
   
       8 . The arrangement, as set forth in  claim 1 , wherein the second retaining means is a liquid presenting a surface tension sufficient to maintain the mounting end portion of the valve element retained in the respective receiving recess of the valve plate, upon mounting the valve. 
   
   
       9 . The arrangement, as set forth in  claim 8 , wherein the second retaining means is a viscous liquid. 
   
   
       10 . The arrangement, as set forth in  claim 9 , wherein the viscous liquid is an oil. 
   
   
       11 . The arrangement, as set forth in  claim 10 , wherein the oil is a lubricant oil. 
   
   
       12 . The arrangement, as set forth in  claim 1  wherein the second retaining means is an adhesive that maintains the mounting end portion of the valve element retained in the respective receiving recess of the valve plate, upon mounting the valve. 
   
   
       13 . The arrangement, as set forth in  claim 1  wherein the valve element comprises an eccentric indexing means provided in its mounting end portion. 
   
   
       14 . The arrangement, as set forth in  claim 1  wherein the eccentric indexing means is provided adjacent to an edge of the mounting end portion. 
   
   
       15 . The arrangement, as set forth in  claim 1  wherein the valve element is a suction valve, the first retaining means comprising a top portion of the cylinder and a cylinder cover seated against the valve plate. 
   
   
       16 . The arrangement, as set forth in  claim 2 , wherein the receiving recess presents a contour coinciding with that of the respective valve element, said contour maintaining a minimum clearance from the adjacent contour of the valve element of the parts of bending median portion and sealing end portion. 
   
   
       17 . The arrangement, as set forth in  claim 2 , wherein the orientation projection is defined by at least one pin projecting from the receiving recess and fitted into a respective orientation recess provided in the mounting end portion of the valve element. 
   
   
       18 . The arrangement, as set forth in  claim 2 , wherein the second retaining means is a liquid presenting a surface tension sufficient to maintain the mounting end portion of the valve element retained in the respective receiving recess of the valve plate, upon mounting the valve. 
   
   
       19 . The arrangement, as set forth in  claim 2 , wherein the second retaining means is an adhesive that maintains the mounting end portion of the valve element retained in the respective receiving recess of the valve plate, upon mounting the valve. 
   
   
       20 . The arrangement, as set forth in  claim 2 , wherein the valve element comprises an eccentric indexing means provided in its mounting end portion. 
   
   
       21 . The arrangement, as set forth in  claim 2  wherein the eccentric indexing means is provided adjacent to an edge of the mounting end portion. 
   
   
       22 . The arrangement, as set forth in  claim 2 , wherein the valve element is a suction valve, the first retaining means comprising a top portion of the cylinder and a cylinder cover seated against the valve plate.