US 12,276,286 B2
Refrigerant compressor with impeller having slotted shroud
Tianli Zhang, Ann Arbor, MI (US); Jin Yan, Tallahassee, FL (US); and Jose Manuel Urcia, Land O Lakes, FL (US)
Assigned to Danfoss A/S, Nordborg (DK)
Appl. No. 18/274,064
Filed by Danfoss A/S, Nordborg (DK)
PCT Filed Apr. 12, 2022, PCT No. PCT/US2022/024374
§ 371(c)(1), (2) Date Jul. 25, 2023,
PCT Pub. No. WO2022/225743, PCT Pub. Date Oct. 27, 2022.
Claims priority of provisional application 63/189,277, filed on May 17, 2021.
Claims priority of provisional application 63/177,418, filed on Apr. 21, 2021.
Prior Publication US 2024/0426318 A1, Dec. 26, 2024
Int. Cl. F04D 29/44 (2006.01); F04D 17/10 (2006.01); F04D 29/28 (2006.01)
CPC F04D 29/441 (2013.01) [F04D 17/10 (2013.01); F04D 29/284 (2013.01)] 10 Claims
OG exemplary drawing
 
1. A refrigerant compressor, comprising:
a shrouded impeller including a passageway permitting refrigerant to flow from a location radially outside a shroud of the shrouded impeller to a location radially inside the shroud,
wherein the passageway is a slot,
wherein the slot is spaced axially between a leading edge and a trailing edge of the shrouded impeller,
wherein the shrouded impeller includes a plurality of main blades,
wherein the shrouded impeller includes a splitter blade between adjacent ones of the main blades, and
wherein the slot is arranged downstream of leading edges of the main blades and upstream of a leading edge of the splitter blade.