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US 11,143,193 B2Granted
Unloading device for HVAC compressor with mixed and radial compression stages
AssigneeDanfoss A/S
InventorsJin Yan, Lin Xiang Sun, Arnold Martin Schaefer, Ruiguo Gao
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Abstract
A refrigerant compressor according to an exemplary aspect of the present disclosure includes, among other things, an impeller arranged in a main flow path and including a plurality of vanes. The impeller is configured to rotate about an axis. A channel is outside the main flow path. A first orifice fluidly couples the channel to the main flow path upstream of the vanes, and a second orifice fluidly couples the channel to the main flow path downstream of leading edges of the vanes.
Claims18
A refrigerant compressor, comprising:
- an impeller arranged in a main flow path and including a plurality of vanes, the impeller configured to rotate about an axis;
- and
- a channel outside the main flow path, a first orifice fluidly coupling the channel to the main flow path upstream of the vanes, and a second orifice fluidly coupling the channel to the main flow path downstream of leading edges of the vanes, wherein the channel extends both circumferentially and axially relative to the axis, wherein the channel extends helically relative to the axis.
A refrigerant system comprising:
- a main refrigerant loop including a compressor, a condenser, an evaporator, and an expansion device, wherein the compressor includes:
- an impeller arranged in a main flow path and including a plurality of vanes, the impeller configured to rotate about an axis;
- and
- a channel outside the main flow path, a first orifice fluidly coupling the channel to the main flow path upstream of the vanes, and a second orifice fluidly coupling the channel to the main flow path downstream of leading edges of the vanes, wherein the channel extends both circumferentially and axially relative to the axis, wherein the channel extends helically relative to the axis.
1 more element
Dependencies are inferred from the claim text.