US 12,253,080 B2
Positive displacement machine, method, vehicle air conditioning system, and vehicle
Christian Busch, Feldkirch (AT); Jochen Bont, Feldkirch (AT); Markus Öttl, Lustenau (AT); and Roman Lässer, Wolfurt (AT)
Assigned to OET GmbH, Lustenau (AT)
Appl. No. 17/995,457
Filed by OET GMBH, Lustenau (AT)
PCT Filed Mar. 30, 2021, PCT No. PCT/EP2021/058251
§ 371(c)(1), (2) Date Oct. 4, 2022,
PCT Pub. No. WO2021/204592, PCT Pub. Date Oct. 14, 2021.
Claims priority of application No. 10 2020 110 097.3 (DE), filed on Apr. 9, 2020.
Prior Publication US 2023/0167821 A1, Jun. 1, 2023
Int. Cl. F04C 18/02 (2006.01); B60H 1/32 (2006.01); F04C 29/12 (2006.01)
CPC F04C 18/0215 (2013.01) [B60H 1/3223 (2013.01); F04C 29/12 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A scroll-type positive displacement machine, in particular a scroll compressor, 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 an outlet opening, through which a compressed working medium flows into the high-pressure chamber during operation, is arranged in the counter spiral in a high-pressure region, and wherein the displacement spiral has at least a first and a second passage opening for fluidic connection with the counter-pressure chamber,
wherein at least the first passage opening is arranged in the region of the outlet opening, so that, during operation, the first passage opening and the outlet opening temporarily overlap at least in sections,
wherein the first passage opening is fluidically connected with the counter-pressure chamber in an angular range of the rotation angle of the orbiting displacement spiral of 435° to 650°.
 
14. A method for operating a scroll-type positive displacement machine, in particular a scroll compressor, 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 an outlet opening, through which a compressed working medium flows into the high-pressure chamber during operation, is arranged in the counter spiral in a high-pressure region, and wherein the displacement spiral has at least a first and a second passage opening for fluidic connection with the counter-pressure chamber,
wherein at least the first passage opening is arranged in the region of the outlet opening, so that, during operation, the first passage opening and the outlet opening temporarily overlap at least in sections,
wherein—the first passage opening is fluidically connected with the counter-pressure chamber in an angular range of the rotation angle of the orbiting displacement spiral of 435° to 650°,
in which,
during operation of the positive displacement machine, at least sections of the first passage opening temporarily overlap the outlet opening centrally arranged in the counter spiral, and a fluid connection is formed with the counter-pressure chamber.