# US 11,905,952 B2 · Scroll machine with passage in spiral, method, vehicle air conditioning system, and vehicle > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,905,952 B2 - Document ID: US11905952B2 - Status: Granted - Kind: B2 - Application number: 17/995,462 - Filed: 2021-03-30 - Published: 2023-06-08 - Granted: 2024-02-20 - Earliest claimed: 2020-04-09 - Assignees: OET GmbH - Applicants: Oet GmbH - Inventors: Christian Busch; Jochen Bont; Roman Lässer - Web page: https://patentgrep.com/patent/US11905952B2 ## CPC - F04C 18/0215: {where only one member is moving} - F04C 18/0253: {Details concerning the base} - F04C 18/0261: {Details of the ports, e.g. location, number, geometry} - F04C: ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT MACHINES FOR LIQUIDS (engines F03C); ROTARY-PISTON, OR OSCILLATING-PISTON, POSITIVE-DISPLACEMENT PUMPS ## Abstract The invention relates to a scroll-type positive displacement machine, in particular a scroll compressor, comprising a highpressure chamber (11), a low-pressure chamber (12), an orbiting displacement spiral (13), a counter spiral (14), and a counterpressure chamber (15) which is located between the low-pressure chamber (12) and the displacement spiral (13), the displacement spiral (13) engaging in the counter spiral (14) in such a way that, during operation, at least a first and a second compression chamber (16a, 16b) for receiving a working medium are temporarily formed, and the displacement spiral (13) having at least one passage opening (17) for fluidic connection to the counter-pressure chamber (15), wherein the passage opening (17) is located in the displacement spiral (13) in such a manner that, during operation, due to the orbiting movement of the displacement spiral (13), at least sections of the passage opening (17) are temporarily arranged in the first compression chamber (16a) and subsequently at least sections of the passage opening are temporarily arranged in the second compression chamber (16b). ## Claims ### Claim 1 A scroll positive displacement machine with a high-pressure chamber, a low-pressure chamber, an orbiting displacement spiral, a counter spiral and a counter-pressure chamber, which is arranged between the low-pressure chamber and the orbiting displacement spiral, wherein the orbiting displacement spiral engages into the counter spiral in such a way that, during operation, at least a first and a second compression chamber are temporarily formed for receiving a working medium, and wherein the orbiting displacement spiral has at least one passage opening for fluid connection with the counter-pressure chamber, wherein the at least one passage opening is arranged in the orbiting displacement spiral in such a way that, during operation, orbiting motion of the orbiting displacement spiral causes the at least one passage opening to be temporarily arranged at least in sections in the first compression chamber, and subsequently temporarily arranged at least in sections in the second compression chamber; wherein the first compression chamber is fluidically connected with the counter-pressure chamber in an angular range of the rotation angle of the orbiting displacement spiral of 120° to 400°; and wherein the first compression chamber is fluidically connected with the counter-pressure chamber at a relative volume of 84% to 40%. ### Claim 2 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the counter spiral comprises spiral sections, wherein, while switching from the first compression chamber to the second compression chamber, the at least one passage opening passes at least one spiral section arranged between two compression chambers that border each other in a radial direction. ### Claim 3 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the at least one passage opening is arranged in a section of a floor of the displacement spiral. ### Claim 4 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the at least one passage opening has a circular, elliptical, or ovoid cross section. ### Claim 5 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the angular range comprises 247° to 367°. ### Claim 6 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the second compression chamber is fluidically connected with the counter-pressure chamber in an angular range of the rotation angle of the orbiting displacement spiral of 270° to 550°. ### Claim 7 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the second compression chamber is fluidically connected with the counter-pressure chamber at a relative volume of 61% to 19%. ### Claim 8 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the at least one passage opening is closed while passing a spiral section while switching from the first to the second compression chamber or vice versa for an angular range of the rotation angle of 5° to 20°. ### Claim 9 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the at least one passage opening has a control geometry that is arranged in a surface of the orbiting displacement spiral facing the counter spiral. ### Claim 10 (depends on 9) The scroll positive displacement machine according to claim 9, wherein the control geometry has a depression and/or indentation. ### Claim 11 (depends on 9) The scroll positive displacement machine according to claim 9, wherein the counter spiral has spiral sections, the spiral sections have a radially inner spiral wall and a radially outer spiral wall, wherein the control geometry and/or the at least one passage opening is arranged between the radially inner and the radially outer spiral walls in a closed state. ### Claim 12 (depends on 1) The scroll positive displacement machine according to claim 1, wherein the orbiting displacement spiral and/or the counter spiral have a chamfer at least in sections. ### Claim 13 (depends on 1) A method for operating the scroll positive displacement machine according to claim 1, in which, during operation, the orbiting motion of the orbiting displacement spiral causes the at least one passage opening to be temporarily arranged at least in sections in the first compression chamber, and subsequently temporarily arranged at least in sections in the second compression chamber, and fluidically connect the respective first or second compression chamber with the counter-pressure chamber. ### Claim 14 (depends on 1) A vehicle air conditioning system with the scroll positive displacement machine according to claim 1. ### Claim 15 (depends on 14) A vehicle with the vehicle air conditioning system according to claim 14. ### Claim 16 (depends on 1) A vehicle with the scroll positive displacement machine according to claim 1. ### Claim 17 A scroll positive displacement machine with a high-pressure chamber, a low-pressure chamber, an orbiting displacement spiral, a counter spiral and a counter-pressure chamber, which is arranged between the low-pressure chamber and the displacement spiral, wherein the orbiting displacement spiral engages into the counter spiral in such a way that, during operation, at least a first and a second compression chamber are temporarily formed for receiving a working medium, and wherein the orbiting displacement spiral has at least one passage opening for fluid connection with the counter-pressure chamber, wherein the at least one passage opening is arranged in the orbiting displacement spiral in such a way that, during operation, orbiting motion of the orbiting displacement spiral causes the at least one passage opening to be temporarily arranged at least in sections in the first compression chamber, and subsequently temporarily arranged at least in sections in the second compression chamber; and wherein the first compression chamber is fluidically connected with the counter-pressure chamber at a relative volume of 84% to 40%. ### Claim 18 A scroll positive displacement machine with a high-pressure chamber, a low-pressure chamber, an orbiting displacement spiral, a counter spiral and a counter-pressure chamber, which is arranged between the low-pressure chamber and the orbiting displacement spiral, wherein the orbiting displacement spiral engages into the counter spiral in such a way that, during operation, at least a first and a second compression chamber are temporarily formed for receiving a working medium, and wherein the orbiting displacement spiral has at least one passage opening for fluid connection with the counter-pressure chamber, wherein the at least one passage opening is arranged in the orbiting displacement spiral in such a way that, during operation, the orbiting motion of the orbiting displacement spiral causes the at least one passage opening to be temporarily arranged at least in sections in the first compression chamber, and subsequently temporarily arranged at least in sections in the second compression chamber; wherein the first compression chamber is fluidically connected with the counter-pressure chamber in an angular range of the rotation angle of the orbiting displacement spiral of 120° to 400°; and wherein the first compression chamber is fluidically connected with the counter-pressure chamber at a relative volume of 80% to 46%.