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US 12,276,286 B2Granted
Refrigerant compressor with impeller having slotted shroud
AssigneeDanfoss A/S
InventorsTianli Zhang, Jin Yan, Jose Manuel Urcia
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Abstract
In some aspects, the techniques described herein relate to a refrigerant compressor, including: 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.
Claims10
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.
3 more elements
A method, comprising:
- operating refrigerant compressor including a shrouded impeller such that the shrouded impeller rotates within a housing;
- and
- directing leakage flow between the shrouded impeller and the housing back into the shrouded impeller through a passageway extending radially through a shroud of the shrouded impeller,
- 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.
5 more elements
Dependencies are inferred from the claim text.