Scroll compressor

Abstract

A scroll compressor includes a housing; a partition wall disposed in the housing, the partition wall dividing a space inside the housing into a first space below the partition wall and a second space above the partition wall, the partition wall having an opening in a central portion; a first scroll and a second scroll disposed in the first space inside the housing; a discharge member having a lower end of the discharge member located the port of the first end plate of the first scroll and an upper end of the discharge member connected to an edge of the opening of the partition wall, the discharge member having an internal passage for discharging compressed medium from the port of the first end plate of the first scroll to the second space above the partition wall; and a heat shield disposed between the partition wall and the first end plate of the first scroll. By providing a heat shield, the impact of high-temperature medium discharged from the compression chamber on the to-be-compressed medium sucked into the compression chamber formed by the first and second scrolls is mitigated.

1 . A scroll compressor comprising:
 a housing;   a partition wall disposed in the housing, the partition wall dividing a space inside the housing into a first space below the partition wall and a second space above the partition wall, the partition wall having an opening in a central portion;   a first scroll disposed in the first space inside the housing, the first scroll comprising a first end plate and a first scroll wrap extending downward from the first end plate, and a port penetrating a central portion of the first end plate;   a second scroll disposed in the first space inside the housing, the second scroll comprising a second end plate and a second scroll wrap extending upward from the second end plate, the second scroll wrap and the first scroll wrap engaging to form a compression chamber for compressing a medium;   a discharge member having a lower end of the discharge member above the port of the first end plate of the first scroll and an upper end of the discharge member connected to an edge of the opening of the partition wall, the discharge member having an internal passage for discharging compressed medium from the port of the first end plate of the first scroll to the second space above the partition wall; and   a heat shield disposed between the partition wall and the first end plate of the first scroll.   
     
     
         2 . The scroll compressor of  claim 1 , wherein
 the heat shield comprises an annular disc-shaped portion and has a central hole, the discharge member passes through the central hole.   
     
     
         3 . The scroll compressor of  claim 1 , wherein
 the heat shield comprises an annular disc-shaped portion and a cylindrical portion extending downward from an inner periphery of the annular disc-shaped portion, and a lower portion of the discharge member is disposed in the cylindrical portion of the heat shield.   
     
     
         4 . The scroll compressor of  claim 1 , wherein the heat shield is connected to the housing. 
     
     
         5 . The scroll compressor of  claim 1 , further comprising:
 a driving member disposed below the second scroll, the driving member comprising a hub portion with an inner hole; and a flange portion extending outward from an end of the hub portion in a radial direction of the hub portion; and   a scroll cover comprising: an end plate with a central hole; and a cylindrical portion extending downward from an outer periphery of the end plate, wherein the cylindrical portion of the scroll cover is connected to the flange portion of the driving member, and the end plate of the scroll cover is connected to the first end plate of the first scroll, and the discharge member passes through the central hole of the end plate of the scroll cover,   wherein at least a part of the heat shield is disposed between the partition wall and the scroll cover.   
     
     
         6 . The scroll compressor of  claim 5 , wherein
 the heat shield comprises an annular disc-shaped portion with a central hole, the discharge member passes through the central hole, the disc-shaped portion of the heat shield is spaced apart from the end plate of the scroll cover, and   a suction passage is formed between an outer peripheral surface of the discharge member and a hole wall of the central hole of the end plate of the scroll cover, a to-be-compressed medium enters the compression chamber of the first scroll and the second scroll through a gap between the disc-shaped portion of the heat shield and the end plate of the scroll cover, the suction passage, a gap formed between the end plate of the scroll cover and the first end plate of the first scroll, and a gap between an inner wall of the cylindrical portion of the scroll cover and the first scroll and the second scroll.   
     
     
         7 . The scroll compressor of  claim 5 , wherein
 the heat shield comprises an annular disc-shaped portion and a cylindrical portion extending downward from an inner periphery of the annular disc-shaped portion, a lower portion of the discharge member is disposed in the cylindrical portion of the heat shield, and the disc-shaped portion of the heat shield is spaced apart from the end plate of the scroll cover, and   a suction passage is formed between an outer peripheral surface of the cylindrical portion of the heat shield and a hole wall of the central hole of the end plate of the scroll cover, a to-be-compressed medium enters the compression chamber of the first scroll and the second scroll through a gap between the disc-shaped portion of the heat shield and the end plate of the scroll cover, the suction passage, a gap formed between the end plate of the scroll cover and the first end plate of the first scroll, and a gap between an inner wall of the cylindrical portion of the scroll cover and the first scroll and the second scroll.   
     
     
         8 . The scroll compressor of  claim 2 , wherein
 the disc-shaped portion of the heat shield has an upward convex shape.   
     
     
         9 . The scroll compressor of  claim 3 , wherein
 the heat shield further comprises a flange extending outward from a lower end of the cylindrical portion, and the flange is adjacent to the first end plate of the first scroll.   
     
     
         10 . The scroll compressor of  claim 1 , wherein
 the heat shield is formed from a metal plate through a stamping process.   
     
     
         11 . The scroll compressor of  claim 1 , further comprising:
 a motor;   a driving member located below the second scroll, wherein the motor drives the first scroll to rotate through the driving member, and the first scroll drives the second scroll to rotate, the driving member comprises a hub portion with an inner hole; and a flange portion extending outward from an end of the hub portion in a radial direction of the hub portion; and   a support, wherein the driving member is rotatably supported on the support.   
     
     
         12 . The scroll compressor of  claim 11 , further comprising:
 a scroll cover comprising an end plate with a central hole; and a cylindrical portion extending downward from an outer periphery of the end plate, wherein the cylindrical portion of the scroll cover is connected to the flange portion of the driving member, and the end plate of the scroll cover is connected to the first end plate of the first scroll.   
     
     
         13 . The scroll compressor of  claim 11 , further comprising:
 a fixed shaft, wherein a lower end of the fixed shaft is fixed to the support, and the hub portion of the driving member is rotatably mounted on the fixed shaft.   
     
     
         14 . The scroll compressor of  claim 13 , wherein
 the support comprises a cylindrical portion, and the driving member is rotatably supported on the cylindrical portion of the support.   
     
     
         15 . The scroll compressor of  claim 14 , wherein
 a part of the fixed shaft is inserted into the cylindrical portion of the support and fixed to the cylindrical portion of the support, and the fixed shaft has a cylindrical shape.   
     
     
         16 . The scroll compressor of  claim 6 , further comprising:
 a motor; and   a compressor suction port disposed in the housing;   wherein a to-be-compressed medium is sucked into the scroll compressor from the compressor suction port, and enters the compression chamber of the first scroll and the second scroll through a gap between the motor, the disc-shaped portion of the heat shield and the end plate of the scroll cover, the suction passage, a gap formed between the end plate of the scroll cover and the first end plate of the first scroll, and a gap between an inner wall of the cylindrical portion of the scroll cover and the first scroll and the second scroll.   
     
     
         17 . The scroll compressor of  claim 1 , wherein
 the first end plate further comprises a groove surrounding the port,   the scroll compressor further comprises a sealing ring disposed in the groove and extending from the groove, the sealing ring is located between the lower end of the discharge member and the first end plate to form a sealing between the lower end of the discharge member and the first end plate.   
     
     
         18 . The scroll compressor of  claim 17 , wherein
 the sealing ring has a C-shaped cross section, and an opening of the sealing ring faces a rotation axis of the first scroll.   
     
     
         19 . The scroll compressor of  claim 17 , wherein
 the sealing ring has a recess on an outer periphery thereof; and   the scroll compressor further comprises an anti-rotation pin fixed to the first end plate of the first scroll and has a stop portion protruding into the groove, the stop portion fits with the recess of the sealing ring.   
     
     
         20 . The scroll compressor of  claim 1 , further comprising:
 a driving member located below the second scroll, the driving member comprising a hub portion with an inner hole; and a flange portion extending outward from an end of the hub portion in a radial direction of the hub portion,   wherein the first scroll comprises a scroll cover casted integrally with the first scroll, and the scroll cover comprises an end plate with a central hole; and a cylindrical portion extending downward from an outer periphery of the end plate, wherein the cylindrical portion of the scroll cover is connected to the flange portion of the driving member, and the end plate of the scroll cover is connected to the first end plate of the first scroll, the discharge member passes through the central hole of the end plate of the scroll cover, and at least a part of the heat shield is disposed between the partition wall and the scroll cover.