# US 11,905,951 B2 · Scroll compressor and process for compressing a gaseous fluid with the scroll compressor > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,905,951 B2 - Document ID: US11905951B2 - Status: Granted - Kind: B2 - Application number: 17/431,676 - Filed: 2020-04-06 - Published: 2022-04-21 - Granted: 2024-02-20 - Earliest claimed: 2019-05-29 - Assignees: Hanon Systems - Applicants: Hanon Systems - Inventors: Dirk Gutberlet; Kadir Dursun; Michael Friedl - Web page: https://patentgrep.com/patent/US11905951B2 ## CPC - F04C 18/0215: {where only one member is moving} - F04C 18/0246: {Details concerning the involute wraps or their base, e.g. geometry} - F04C 18/0269: {Details concerning the involute wraps} - F04C 2240/10: Stators - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract A scroll compressor for compressing a gaseous fluid, in particular a refrigerant. The scroll compressor exhibits a non-moving stator with at least one outlet and a moving orbiter, each with a base plate and a spiral-shaped wall that extends from the base plate. The base plates are arranged relative to one another in such a way that the walls interlock with one another and closed working chambers are created. The volumes and the positions of the working chambers are changed in reaction to a rotary movement of the orbiter here. ## Claims ### Claim 1 A scroll compressor for compressing a gaseous fluid comprising: a non-moving stator with a base plate and a spiral-shaped wall that extends from the base plate; at least one outlet; and a moving orbiter with a base plate and a spiral-shaped wall that extends from the base plate, wherein the base plate of the stator and the base plate of the orbiter are arranged relative to one another in such a way that the wall of the stator and the wall of the orbiter interlock with one another and create closed working chambers, wherein volumes and positions of the working chambers are changed in reaction to a rotary movement of the orbiter, wherein the wall of the stator and the wall of the orbiter are configured in such a way that a first end chamber of the working chambers and a second end chamber of the working chambers of a compression path, as well as an intermediate chamber arranged between the first end chamber and the second end chamber at inner ends of the wall of the stator and the wall of the orbiter are formed in an area of the at least one outlet based on a rotation angle of the orbiter, and wherein at least one of the wall of the stator and the wall of the orbiter in an area of the inner ends is configured in such a way that a gap is created between the wall of the stator and the wall of the orbiter as a flow path from the intermediate chamber to at least one of the first end chamber and the second end chamber or as a flow path from the first end chamber to the second end chamber based on the rotation angle of the orbiter, wherein a degree of opening of the flow path is dependent on the rotation angle of the orbiter, wherein as the rotation angle of the orbiter increases, the degree of opening of the flow path from the intermediate chamber to the at least one of the first end chamber and the second end chamber increases from 0 to a maximum, and the degree of opening of the flow path from the first end chamber to the second end chamber gradually increases from when the degree of opening of the flow path from the intermediate chamber to the at least one of the first end chamber and the second end chamber is the maximum. ### Claim 2 (depends on 1) The scroll compressor according to claim 1, wherein the wall of the stator with the inner end on the wall of the orbiter and the wall of the orbiter with the inner end on the wall of the stator are arranged next to one another and create the sealed intermediate chamber based on the rotation angle of the orbiter. ### Claim 3 (depends on 1) The scroll compressor according to claim 1, wherein the gap is created, based on the rotation angle of the orbiter, between the wall of the stator and the wall of the orbiter as a flow path from the intermediate chamber to the first end chamber and/or the gap is created as a flow path from the intermediate chamber to the second end chamber, wherein the degree of opening of each of the flow paths is dependent on the rotation angle of the orbiter. ### Claim 4 (depends on 1) The scroll compressor according to claim 1, wherein the at least one of the wall of the stator and the wall of the orbiter is constructed with a wall thickness reduced in the area of the inner ends between two sections in order to increase an original volume of the intermediate chamber. ### Claim 5 (depends on 4) The scroll compressor according to claim 4, wherein the at least one of the wall of the stator and the wall of the orbiter is constructed in such a way that the wall thickness of the at least one of the wall of the stator and the wall of the orbiter decreases continuously from a first one of the two sections moving towards a second one of the two sections and is then increased in an area of the second one of the two sections to an original thickness at the second one of the two sections. ### Claim 6 (depends on 1) The scroll compressor according to claim 1, wherein the at least one of the wall of the stator and the wall of the orbiter exhibits a constant wall thickness across a height of the at least one of the wall of the stator and the wall of the orbiter. ### Claim 7 (depends on 1) The scroll compressor according to claim 1, wherein the wall of the orbiter is constructed in such a way in the area of the inner end that a gap is created between the wall of the stator and the wall of the orbiter as a flow path from the intermediate chamber to the at least one of the first end chamber and the second end chamber. ### Claim 8 (depends on 1) The scroll compressor according to claim 1, wherein the wall of the stator is constructed in such a way in the area of the inner end that a gap is created between the wall of the stator and the wall of the orbiter as a flow path from the intermediate chamber to the at least one of the first end chamber and the second end chamber. ### Claim 9 (depends on 1) A process for compressing the gaseous fluid using the scroll compressor according to claim 1, wherein in a certain range of the rotation angle of the orbiter with an arrangement of the stator and the orbiter a gap is opened between the wall of the stator and the wall of the orbiter as a flow path from the intermediate chamber to the at least one of the first end chamber and the second end chamber, whose degree of opening is dependent on the rotation angle of the orbiter, wherein the intermediate chamber is closed at a rotation angle of 0° with the arrangement of the stator and orbiter. ### Claim 10 (depends on 9) The process according to claim 9, wherein the flow path from the intermediate chamber to the at least one of the first end chamber and the second end chamber is opened in the rotation angle range of greater than 0° up to 60°. ### Claim 11 (depends on 9) The process according to claim 9, wherein an open gap is created between the intermediate chamber and one of the first end chamber and the second end chamber with an arrangement of the stator and the orbiter at the rotation angle of the orbiter in a range around 20°, wherein the flow path between the intermediate chamber and the one of the first end chamber and the second end chamber exhibits a degree of opening of around 20%. ### Claim 12 (depends on 9) The process according to claim 9, wherein an open gap is created between the intermediate chamber and the first end chamber, as well as between the intermediate chamber and the second end chamber, with an arrangement of the stator and the orbiter at the rotation angle of the orbiter in a range around 30°. ### Claim 13 (depends on 12) The process according to claim 12, wherein a flow path between the intermediate chamber and one of the first end chamber and the second end chamber exhibits a degree of opening of around 40%. ### Claim 14 (depends on 9) The process according to claim 9, wherein a gap is created between the intermediate chamber and the first end chamber, as well as between the intermediate chamber and the second end chamber with an arrangement of the stator and the orbiter at the rotation angle of the orbiter in a range around 60° in such a way that compressed fluid flows between the first end chamber and the second end chamber. ### Claim 15 (depends on 9) The process according to claim 9, wherein a flow path between the first end chamber and the second end chamber is continuously opened at the rotation angle within a range greater than 30° and fully open at the rotation angle of around 115° with an arrangement of the stator and the orbiter. ### Claim 16 A scroll compressor for compressing a gaseous fluid comprising: a non-moving stator with a base plate and a spiral-shaped wall that extends from the base plate; at least one outlet; and a moving orbiter with a base plate and a spiral-shaped wall that extends from the base plate, wherein the base plate of the stator and the base plate of the orbiter are arranged relative to one another in such a way that the wall of the stator and the wall of the orbiter interlock with one another and create closed working chambers, wherein volumes and positions of the working chambers are changed in reaction to a rotary movement of the orbiter, wherein the wall of the stator and the wall of the orbiter are configured in such a way that a first end chamber of the working chambers and a second end chamber of the working chambers of a compression path, as well as an intermediate chamber arranged between the first end chamber and the second end chamber at inner ends of the wall of the stator and the wall of the orbiter are formed in an area of the at least one outlet based on a rotation angle of the orbiter, and wherein at least one of the wall of the stator and the wall of the orbiter in an area of the inner ends is configured in such a way that a gap is created between the wall of the stator and the wall of the orbiter as a flow path from the intermediate chamber to at least one of the first end chamber and the second end chamber, wherein a degree of opening of the flow path is dependent on the rotation angle of the orbiter, wherein the at least one of the wall of the stator and the wall of the orbiter is constructed with a wall thickness reduced in the area of the inner ends between two sections in order to increase an original volume of the intermediate chamber, wherein the at least one of the wall of the stator and the wall of the orbiter is constructed in such a way that the wall thickness of the at least one of the wall of the stator and the wall of the orbiter decreases continuously from a first one of the two sections moving towards a second one of the two sections and is then increased in an area of the second one of the two sections to an original thickness at the second one of the two sections. ### Claim 17 A process for compressing a gaseous fluid using a scroll compressor, the scroll compressor comprising: a non-moving stator with a base plate and a spiral-shaped wall that extends from the base plate; at least one outlet; and a moving orbiter with a base plate and a spiral-shaped wall that extends from the base plate, wherein the base plate of the stator and the base plate of the orbiter are arranged relative to one another in such a way that the wall of the stator and the wall of the orbiter interlock with one another and create closed working chambers, wherein volumes and positions of the working chambers are changed in reaction to a rotary movement of the orbiter, wherein the wall of the stator and the wall of the orbiter are configured in such a way that a first end chamber of the working chambers and a second end chamber of the working chambers of a compression path, as well as an intermediate chamber arranged between the first end chamber and the second end chamber at inner ends of the wall of the stator and the wall of the orbiter are formed in an area of the at least one outlet based on a rotation angle of the orbiter, and wherein at least one of the wall of the stator and the wall of the orbiter in an area of the inner ends is configured in such a way that a gap is created between the wall of the stator and the wall of the orbiter as a flow path from the intermediate chamber to at least one of the first end chamber and the second end chamber, wherein a degree of opening of the flow path is dependent on the rotation angle of the orbiter, wherein in a certain range of the rotation angle of the orbiter with an arrangement of the stator and the orbiter a gap is opened between the wall of the stator and the wall of the orbiter as a flow path from the intermediate chamber to the at least one of the first end chamber and the second end chamber, whose degree of opening is dependent on the rotation angle of the orbiter, wherein the intermediate chamber is closed at a rotation angle of 0° with the arrangement of the stator and orbiter.