Compressor

Patent metadata

Field	Value
Publication number	US-11277044-B2
Application number	US-201815902374-A
Country	US
Kind code	B2
Filing date	Feb 22, 2018
Priority date	Aug 27, 2015
Publication date	Mar 15, 2022
Grant date	Mar 15, 2022

Abstract

The invention relates to a compressor for refrigerant having a compressor housing, said compressor housing being provided with a suction inlet and a pressure outlet, said compressor comprising a compression unit, arranged in a compression housing section of said compressor housing and an electric motor arranged in a motor housing section of said compressor housing, said electric motor comprising a stator arranged within a stator receiving sleeve of said motor housing section and a rotor surrounded by said stator and arranged on a drive shaft of said electric motor for rotation about an axis of rotation together with said drive shaft, said stator comprising a stator core having a stack of laminations and extending parallel to said axis of rotation from a first front side to a second front side, said stator having windings extending through said stator core and forming end windings arranged in front of said front surfaces, and a channel for guiding at least a portion of said refrigerant entering through said suction inlet along an outer side of said stator before entering said compression unit.

First claim

The invention claimed is:

1. Compressor for refrigerant having a compressor housing, said compressor housing being provided with a suction inlet and a pressure outlet, said compressor comprising a compression unit, arranged in a compression housing section of said compressor housing and an electric motor arranged in a motor housing section of said compressor housing, said electric motor comprising a stator arranged within a stator receiving sleeve of said motor housing section and a rotor surrounded by said stator and arranged on a drive shaft of said electric motor for rotation about an axis of rotation together with said drive shaft, said stator comprising a stator core having a stack of laminations and extending parallel to said axis of rotation from a first front side to a second front side, said stator having windings extending through said stator core and forming end windings arranged in front of said front sides, and a channel for guiding at least a portion of said refrigerant entering through said suction inlet along an outer side of said stator before entering said compression unit, wherein the stator core is provided with at least two stator support elements fixed to said stator core and extending in radial direction of said axis of rotation beyond an outer surface of said stator core for support of said stator on an inner sleeve surface of said stator receiving sleeve without a weld therebetween, said at least two stator support elements together with said inner sleeve surface and said outer surface of said stator core forming the channel for guiding at least a portion of said refrigerant; and wherein said outer side of said stator is provided by outer surfaces of said end windings of said stator and an outer surface of said stator extending between said end windings of said stator; and
wherein the stator core is rotationally fixed to the stator receiving sleeve at a predetermined angular orientation; and wherein said channel is one of a plurality of flow guiding channels that extend along said stator support elements of said electric motor, wherein said stator support elements are fixed onto said stator core as separate elements.

2. Compressor for refrigerant having a compressor housing, said compressor housing being provided with a suction inlet and a pressure outlet, said compressor comprising a compression unit, arranged in a compression housing section of said compressor housing and an electric motor arranged in a motor housing section of said compressor housing, said electric motor comprising a stator arranged within a stator receiving sleeve of said motor housing section and a rotor surrounded by said stator and arranged on a drive shaft of said electric motor for rotation about an axis of rotation together with said drive shaft, said stator comprising a stator core having a stack of laminations and extending parallel to said axis of rotation from a first front side to a second front side, said stator having windings extending through said stator core and forming end windings arranged in front of said front sides, and a channel for guiding at least a portion of said refrigerant entering through said suction inlet along an outer side of said stator before entering said compression unit, wherein the stator core is provided with at least two stator support elements fixed to said stator core and extending in radial direction of said axis of rotation beyond an outer surface of said stator core for support of said stator on an inner sleeve surface of said stator receiving sleeve without a weld therebetween, said at least two stator support elements together with said inner sleeve surface and said outer surface of said stator core forming the channel for guiding at least a portion of said refrigerant; and wherein said outer side of said stator is provided by outer surfaces of said end windings of said stator and an outer surface of said stator extending between said end windings of said stator; and
wherein the stator core is rotationally fixed to the stator receiving sleeve at a predetermined angular orientation; and wherein said channel is one of a plurality of flow guiding channels that extend along said stator support elements of said electric motor, and
wherein said stator support elements are arranged and fixed on an outer contour of said stator core,and said stator support elements are welded on said outer contour of said stator core.

3. Compressor for refrigerant having a compressor housing, said compressor housing being provided with a suction inlet and a pressure outlet, said compressor comprising a compression unit, arranged in a compression housing section of said compressor housing and an electric motor arranged in a motor housing section of said compressor housing, said electric motor comprising a stator arranged within a stator receiving sleeve of said motor housing section and a rotor surrounded by said stator and arranged on a drive shaft of said electric motor for rotation about an axis of rotation together with said drive shaft, said stator comprising a stator core having a stack of laminations and extending parallel to said axis of rotation from a first front side to a second front side, said stator having windings extending through said stator core and forming end windings arranged in front of said front sides, and a channel for guiding at least a portion of said refrigerant entering through said suction inlet along an outer side of said stator before entering said compression unit, wherein the stator core is provided with at least two stator support elements fixed to said stator core and extending in radial direction of said axis of rotation beyond an outer surface of said stator core for support of said stator on an inner sleeve surface of said stator receiving sleeve, wherein said stator support elements are fixed onto said stator core as separate elements wherein said stator support elements are hollow elements.

4. Compressor in accordance with claim 3 , wherein said stator support elements provide an additional flow guiding channel extending through said stator support elements.

5. Compressor in accordance with claim 3 , wherein said stator support elements are U-shaped.

6. Compressor in accordance with claim 3 , said stator support elements comprise two foot sections fixed to the stator core and flange sections adjoining said foot sections and extending up to a bridging section arranged at a distance from the outer surface of said stator core.

7. Compressor for refrigerant having a compressor housing, said compressor housing being provided with a suction inlet and a pressure outlet, said compressor comprising a compression unit, arranged in a compression housing section of said compressor housing and an electric motor arranged in a motor housing section of said compressor housing, said electric motor comprising a stator arranged within a stator receiving sleeve of said motor housing section and a rotor surrounded by said stator and arranged on a drive shaft of said electric motor for rotation about an axis of rotation together with said drive shaft, said stator comprising a stator core having a stack of laminations and extending parallel to said axis of rotation from a first front side to a second front side, said stator having windings extending through said stator core and forming end windings arranged in front of said front sides, and a channel for guiding at least a portion of said refrigerant entering through said suction inlet along an outer side of said stator before entering said compression unit, wherein the stator core is provided with at least two stator support elements fixed to said stator core and extending in radial direction of said axis of rotation beyond an outer surface of said stator core for support of said stator on an inner sleeve surface of said

Assignees

• Bitzer Kuehlmaschinenbau Gmbh

Inventors

• Repentin Franck

Classifications

• H02K7/085

  radially supporting the rotary shaft at only one end of the rotor (H02K7/086, H02K7/09 take precedence) · CPC title

• H02K1/185 Primary

  to outer stators · CPC title

• H02K9/14

  wherein gaseous cooling medium circulates between the machine casing and a surrounding mantle · CPC title