Electric compressor

Patent metadata

Field	Value
Publication number	US-2017356331-A1
Application number	US-201515535232-A
Country	US
Kind code	A1
Filing date	Dec 11, 2015
Priority date	Dec 12, 2014
Publication date	Dec 14, 2017
Grant date	—

Abstract

The present invention relates to an electric compressor ( 9, 17 ) including a shaft ( 13 ) rotated by an electric motor by means of bearings ( 16 ), the shaft rotating a compressor wheel ( 14 ), the compressor ( 9 ) including two sealing segments ( 29 a, 29 b ) mounted around the shaft ( 13 ) between the bearings ( 16 ) and the compressor wheel ( 14 ) and including a vent hole ( 31, 35, 38 ) for circulation of pollutant flows toward the outside of the compressor, the inlet of which is arranged between the two sealing segments, the vent hole including a non-return element ( 36 ).

First claim

1 . An electric compressor comprising:
a shaft rotated by an electric motor by bearings, the shaft rotating a compressor wheel; two sealing segments mounted around the shaft between the bearings and the compressor wheel; and a vent hole for circulation of pollutant flows toward the outside of the compressor, an inlet of which is arranged between the two sealing segments, wherein the vent hole includes a non-return element.

2 . The compressor according to claim 1 , wherein the non-return element is positioned on the circuit of the vent hole so as to limit the pollutant flow accumulation zone.

3 . The compressor according to claim 1 , wherein the non-return element is a valve positioned so as only to be able to open in the circulation direction going from the inlet of the vent hole toward the outlet of the vent hole.

4 . The compressor according to claim 1 , wherein the non-return element includes a movable obstructing member that allows the pollutant flow to pass in only one direction.

5 . The compressor according to claim 4 , wherein when the pollutant flow circulates from the outlet of the vent hole toward the inlet of the vent hole, the movable member is then pressed against a stop to obstruct the conduit of the vent hole.

6 . The compressor according to claim 1 , wherein the non-return element is a ball valve.

7 . The compressor according to claim 1 , wherein the non-return element is a reed valve.

8 . The compressor according to claim 7 , wherein the reed is a flexible membrane.

9 . The compressor according to claim 1 , wherein the motor is a switched reluctance motor.

10 . The compressor according to claim 1 , wherein the compressor is a heat engine electric supercharger compressor.

Assignees

• Valeo Systemes De Controle Moteur

Inventors

• Martin Nicolas
• Lebrasseur Patrick
• Lallemant Mathieu
• Giraud Franck

Classifications

• F02B37/105

  exhaust drive and pump being both connected through gearing to engine-driven shaft · CPC title

• F16K15/14

  with flexible valve members · CPC title

• F16K15/144

  the closure elements being fixed along all or a part of their periphery · CPC title

• F02B33/40 Primary

  of non-positive-displacement type · CPC title

• F04D25/06

  the pump being electrically driven (F04D25/08 takes precedence) · CPC title