Patent · US Active

Unloading device for HVAC compressor with mixed and radial compression stages

US11143193B2 · kind B2 · utility

1Cited by

5References

18Claims

0Family size

Assignee

DANFOSS A/S · DK

Inventors

Jin Yan · Calabasas, US
Lin Sun · Cary, US
Arnold Martin Schaefer · Wellington, US
Ruiguo Gao · Tallahassee, US

Key dates

Filing date	Jul 18, 2019
Grant date	Oct 12, 2021
Priority date	—
Expiry date	Dec 5, 2039

Classification

Technology area (CPC F)Mechanical Engineering; Lighting; Heating
CPC primaryF05D2250/51
WIPO fieldEngines, pumps, turbines
WIPO sectorMechanical engineering

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.

Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.