Scroll compressor

Abstract

A scroll compressor having a casing, a drive motor which is held in place within the casing and has an internal flow passage and an external flow passage to pass through, a rotation shaft which is combined with the drive motor for rotation, a frame that is provided under the drive motor and through which the rotation shaft passes for support, a first scroll which is provided under the frame and on which one flank surface a first wrap is formed, a second scroll which is provided between the frame and the first scroll, on which a second wrap that is engaged with the first wrap is formed, with which the rotation shaft is eccentrically combined and which forms a compression chamber, and a flow passage separation unit which separates a space between the drive motor and the frame into an internal space and an external space is provided.

What is claimed is: 
     
         1 . A scroll compressor comprising:
 a casing;   a drive motor located within the casing, the drive motor having a first flow passage and a second flow passage extending in an axial direction of the drive motor;   a rotation shaft connected to the drive motor, the rotation shaft having an eccentric portion;   a frame located below the drive motor, the frame configured to receive the rotation shaft to support the rotation shaft, the shaft extending through the frame;   a first scroll located below the frame, the first scroll having a first wrap;   a second scroll located between the frame and the first scroll, the second scroll having a second wrap configured to engage the first wrap, the second scroll being connected to the eccentric portion of the rotation shaft; and   a ring shaped flow passage separation unit dividing a space between the drive motor and the frame into an internal space that communicates with the first flow passage of the drive motor and an external space that communicates with the second flow passage of the drive motor,   wherein the flow passage separation unit includes one or more flow passage guides separating the internal space and the external space, the one or more flow passage guides protruding from at least one of a lower surface of the drive motor and an upper surface of the frame toward the other one of the lower surface of the drive motor and the upper surface of the frame.   
     
     
         2 . The scroll compressor of  claim 1 , wherein one end of the flow passage separation unit is inserted into the lower surface of the drive motor or the upper surface of the frame to form a sealing portion. 
     
     
         3 . The scroll compressor of  claim 1 , wherein the flow passage separation unit includes:
 a first flow passage guide protruding from an upper surface of the frame toward a lower surface of the drive motor; and   a second flow passage guide protruding from the lower surface of the drive motor toward the upper surface of the frame,   
       wherein at least one of an upper surface of the first flow passage guide and a lower surface of the second flow passage guide includes a protrusion and at least the other one of the upper surface of the first flow passage guide and the lower surface of the second flow passage guide includes a groove, and 
       wherein the protrusion and the groove are engaged to form a sealing portion. 
     
     
         4 . The scroll compressor of  claim 1 , wherein the flow passage separation unit includes:
 a first flow passage guide protruding from an upper surface of the frame toward a lower surface of the drive motor; and   a second flow passage guide protruding from the lower surface of the drive motor toward the upper surface of the frame,   
       wherein at least one of an upper surface of the first flow passage guide and a lower surface of the second flow passage guide includes a first step portion and at least the other one of the upper surface of the first flow passage guide and the lower surface of the second flow passage guide includes a second step portion, and 
       wherein the first step portion and the second step portion are engaged to form a sealing portion. 
     
     
         5 . The scroll compressor of  claim 1 , wherein the flow passage separation unit includes:
 a first flow passage guide protruding from an upper surface of the frame toward a lower surface of the drive motor; and   a second flow passage guide protruding from the lower surface of the drive motor toward the upper surface of the frame, and   
       wherein a side surface of the first flow passage guide and a side surface of the second flow passage guide facing each other are adhered to form a sealing portion. 
     
     
         6 . The scroll compressor of  claim 1 , wherein the flow passage separation unit includes:
 a first flow passage guide protruding from an upper surface of the frame toward a lower surface of the drive motor; and   a second flow passage guide protruding from the lower surface of the drive motor toward the upper surface of the frame, and   
       wherein stepped portions located on a side surface of the first flow passage guide and a side surface of the second flow passage guide face each other so as to form a sealing portion. 
     
     
         7 . The scroll compressor of  claim 6 , wherein one of the stepped portions is formed as a hook protrusion and the other of the stepped portions is formed as a hook groove, and
 wherein the hook protrusion and the hook groove are engaged to form a sealing portion.   
     
     
         8 . A scroll compressor comprising:
 a casing having an inner circumferential surface;   a stator fixed within the casing, the stator having an outer circumferential surface having one or more first gaps located a distance away from the inner circumferential surface of the casing, and the stator having an inner circumferential surface defining a coil winding portion;   a winding coil wound around the coil winding portion;   a rotor spaced from the inner circumferential surface of the stator by a second gap;   a rotation shaft connected to the rotor, the rotation shaft having an eccentric portion;   a frame located below the stator, the frame configured to receive the rotation shaft to support the rotation shaft, the shaft extending through the frame;   a first scroll located below the frame, the first scroll having a first wrap;   a second scroll located between the frame and the first scroll, the second scroll having a second wrap configured to engage the first wrap, the second scroll being connected to the eccentric portion of the rotation shaft; and   a flow passage guide extending in an axial direction of the rotation shaft from an upper surface of the frame or a lower surface of the stator facing the upper surface of the frame, the flow passage guide separating the second gap from the one or more first gaps, the flow passage guide including:
 a ring shaped first annular wall portion having a first height in the axial direction, the first annular wall portion being located between the coil winding portion and the one or more first gaps; and 
 a ring shaped second annular wall portion having a second height in the axial direction, the second annular wall portion being located between the second gap and the coil winding portion. 
   
     
     
         9 . The scroll compressor of  claim 8 , further comprising a member extending from the other of the upper surface of the frame or the lower surface of the stator from which the flow passage guide extends,
 wherein the first annular wall portion faces the member, and   wherein the first annular wall portion is inserted into the member.   
     
     
         10 . The scroll compressor of  claim 9 , wherein the member is provided with a groove so that the end of the first annular wall portion is inserted to form a sealing portion. 
     
     
         11 . The scroll compressor of  claim 8 , further comprising a member extending from the other of the upper surface of the frame or the lower surface of the stator from which the flow passage guide extends,
 wherein the first annular wall portion faces the member, and   wherein the first annular wall portion directly contacts an outer circumferential surface or an inner circumferential surface of the member.   
     
     
         12 . The scroll compressor of  claim 8 , wherein the first height is greater than or equal to the second height. 
     
     
         13 . The scroll compressor of  claim 12 , further comprising a balance weight located on the rotor or the rotation shaft, the balance weight being located inward from the second annular wall portion. 
     
     
         14 . The scroll compressor of  claim 12 , wherein an end portion of the second annular wall portion is located a further distance away from the member in the axial direction than from an end portion of the first annular wall portion in the axial direction. 
     
     
         15 . A scroll compressor comprising:
 an electric motor;   a compression unit;   a casing accommodating the electric motor and the compression unit therein, the casing having:
 a first space between the electric motor and the compression unit; 
 a second space above the electric motor; and 
 a third space below the compression unit; 
   a flow passage guide located in the first space of the casing, the flow passage guide separating the first space into multiple spaces in a radial direction from a center axis of the casing; and   a sealing portion located between the flow passage guide and a member facing the flow passage guide.   
     
     
         16 . The scroll compressor of  claim 15 , wherein the sealing portion is defined by a portion of the flow passage guide being in direct contact with a portion of the member. 
     
     
         17 . The scroll compressor of  claim 16 , wherein the member is provided with a sealing groove so that one end of the flow passage guide is inserted to form the sealing portion. 
     
     
         18 . The scroll compressor of  claim 15 , wherein the flow passage guide includes:
 a ring shaped first annular wall portion, the first annular wall portion having a first height in an axial direction parallel to the center axis;   a ring shaped second annular wall portion, the second annular wall portion having a second height in the axial direction, and the second annular wall portion being located radially inward from the first annular wall portion; and   an annular surface portion connecting the first annular wall portion and the second annular wall portion.   
     
     
         19 . The scroll compressor of  claim 18 , wherein the compression unit includes a refrigerant hole configured to guide a refrigerant that is compressed in the compression unit to the first space, and
 wherein the flow passage guide includes a refrigerant through-hole located between the first annular wall portion and the second annular wall portion.   
     
     
         20 . The scroll compressor of  claim 19 , wherein an upper surface of the compression unit includes an oil collection groove configured to collect oil that flows down from the second space, and
 wherein the multiple spaces in the first space are in communication via the oil collection groove.