Compressor

Abstract

A scroll compressor is provided that may include a first scroll, a second scroll that defines a plurality of compression chambers together with the first scroll, the second scroll having at least one hole that communicates with at least one of the plurality of compression chambers, a valve coupled to the second scroll to open and close the at least one hole, and a coupling member to couple the valve to the second scroll. A coupling groove, to which the coupling member may be coupled and having a screw thread or unevenness on an inner circumferential surface thereof, may be defined in the second scroll. The coupling member may include a rivet, and may be engaged with the screw thread or unevenness formed on the inner circumferential surface of the coupling groove when the coupling member having passed through the valve is coupled to the coupling groove.

What is claimed is: 
     
         1 . A scroll compressor, comprising:
 a casing comprising a rotational shaft;   a discharge cover fixed inside of the casing to partition the inside of the casing into a suction space and a discharge space;   a first scroll that is revolved by rotation of the rotational shaft;   a second scroll that defines a plurality of compression chambers together with the first scroll, the second scroll having at least one hole that communicates with at least one of the plurality of compression chambers;   a valve coupled to the second scroll to open and close the hole; and   a coupling member configured to couple the valve to the second scroll, wherein a coupling groove to which the coupling member is coupled and having a screw thread or unevenness on an inner circumferential surface thereof is defined in the second scroll, wherein the coupling member comprises a rivet, and wherein the coupling member is engaged with the screw thread or unevenness formed on the inner circumferential surface of the coupling groove when the coupling member passes through the valve and is coupled to the coupling groove.   
     
     
         2 . The scroll compressor according to  claim 1 , further comprising a stopper configured to restrict a moving distance of the valve when the valve opens the at least one hole, wherein each of the stopper and the valve comprises a coupling hole through the coupling member passes to couple the stopper and the valve to the second scroll. 
     
     
         3 . The scroll compressor according to  claim 2 , wherein the stopper comprises at least one protrusion that passes through the valve to align the coupling holes of the stopper and the valve with each other, wherein the valve comprises at least one protrusion through-hole through which the at least one protrusion passes, and wherein the second scroll comprises at least one protrusion accommodation groove, in which the at least one protrusion having passed through the at least one protrusion through-hole is accommodated. 
     
     
         4 . The scroll compressor according to  claim 2 , wherein the at least one hole comprises a plurality of holes provided in the second scroll, wherein the valve comprises:
 a valve support coupled to the second scroll;   a plurality of valve connection portions that extends from the valve support; and   a plurality of valve bodies, respectively, disposed on the plurality of connection portions, and wherein the stopper is disposed above the plurality of valve bodies to contact the plurality of valve bodies.   
     
     
         5 . The scroll compressor according to  claim 4 , wherein the stopper comprises:
 a stopper support coupled to the second scroll;   a plurality of stopper connection portions that extends from the stopper support; and   a plurality of stopper bodies, respectively, disposed on the plurality of stopper connection portions.   
     
     
         6 . The scroll compressor according to  claim 4 , wherein the stopper comprises at least one protrusion that passes through the valve to align the coupling holes of the stopper and the valve with each other, wherein the valve comprises at least one protrusion through-hole through which the at least one protrusion passes, and wherein the second scroll comprises at least one protrusion accommodation groove in which the at least one protrusion having passed through the at least one protrusion through-hole is accommodated. 
     
     
         7 . The scroll compressor according to  claim 6 , wherein the at least one protrusion comprises a plurality of protrusions, wherein the at least one protrusion through-hole comprises a plurality of protrusion through-holes, wherein the at least one protrusion accommodate groove comprises a plurality of protrusion accommodation grooves, and wherein the coupling hole of the stopper is disposed between the plurality of protrusions. 
     
     
         8 . The scroll compressor according to  claim 1 , wherein the second scroll further comprises a discharge hole, through which the refrigerant is discharged. 
     
     
         9 . The scroll compressor according to  claim 1 , further comprising:
 an intermediate pressure discharge hole defined in the second scroll to communicate with a compression chamber having an intermediate pressure of the plurality of compression chambers;   a back pressure plate that defines a back pressure chamber that accommodates the refrigerant discharged from the intermediate pressure discharge hole; and   a floating plate movably disposed on or at a side of the back pressure plate to define the back pressure chamber together with the back pressure plate.   
     
     
         10 . The scroll compressor according to  claim 9 , wherein the back pressure plate covers the valve, the stopper, and the coupling member, which are coupled to the second scroll, and wherein a space to avoid the valve, the stopper, and the coupling member is defined in the back pressure plate. 
     
     
         11 . The scroll compressor according to  claim 1 , wherein the rivet comprises a coupling body coupled to the coupling groove, and a head disposed at a side of the coupling body to contact the stopper. 
     
     
         12 . The scroll compressor according to  claim 1 , wherein the first scroll comprises an orbiting scroll and the second scroll comprises a fixed scroll. 
     
     
         13 . A scroll compressor, comprising:
 a casing comprising a rotational shaft;   a discharge cover fixed inside of the casing to partition the inside of the casing into a suction space and a discharge space;   a first scroll that is revolved by rotation of the rotational shaft;   a second scroll that defines a plurality of compression chambers together with the first scroll, the second scroll having at least one bypass hole that communicates with at least one of the plurality of compression chambers and a discharge hole that discharges a compressed refrigerant;   a valve coupled to the second scroll to open and close the at least one bypass hole;   a stopper configured to restrict a moving distance of the valve when the valve opens and closes the at least one bypass hole; and   a coupling member configured to couple the valve and the stopper to the second scroll, wherein a coupling hole through which the coupling member passes is defined in each of the valve and the stopper, wherein a coupling groove to which the coupling member is coupled is defined in the second scroll, wherein the coupling member comprises a rivet, wherein a screw thread or unevenness is formed on an inner circumferential surface of the coupling groove of the second scroll, and wherein the coupling member is engaged with the screw thread or unevenness formed on the inner circumferential surface of the coupling groove when the coupling member passes through the valve and is coupled to the coupling groove.   
     
     
         14 . The scroll compressor according to  claim 13 , further comprising:
 a plate coupled to the second scroll within the casing, wherein a space to avoid the valve, the stopper, and the coupling member is defined in the plate.   
     
     
         15 . The scroll compressor according to  claim 13 , wherein the rivet comprises a coupling body coupled to the coupling groove, and a head disposed at a side of the coupling body to contact the stopper. 
     
     
         16 . The scroll compressor according to  claim 13 , wherein the first scroll comprises an orbiting scroll and the second scroll comprises a fixed scroll. 
     
     
         17 . A compressor, comprising:
 a first member having at least one hole through which a fluid flows;   a valve coupled to the first member to open and close the at least one hole;   a rivet configured to couple the valve to the first member; and   a second member coupled to the first member, the second member having an avoiding space to avoid the rivet and the valve, wherein, when the rivet is coupled to the first member, a coupling body of the rivet is engaged with a screw thread or unevenness formed on an inner circumferential surface of a coupling groove of the first member.   
     
     
         18 . The compressor according to  claim 17 , wherein the rivet further comprises a separation portion separable from the coupling body, and wherein the coupling body is deformed to be engaged with the screw thread or unevenness while the separation portion is separated from the coupling body. 
     
     
         19 . The compressor according to  claim 17 , wherein the valve further comprising a stopper that restricts a moving distance of the valve when the valve opens and closes the hole, and wherein the rivet couples the valve and the stopper to the first member. 
     
     
         20 . The compressor according to  claim 17 , wherein the compressor comprises a scroll compressor.