Compressor flow path

Patent metadata

Field	Value
Publication number	US-9848745-B2
Application number	US-201414268636-A
Country	US
Kind code	B2
Filing date	May 2, 2014
Priority date	May 3, 2013
Publication date	Dec 26, 2017
Grant date	Dec 26, 2017

Abstract

A product that includes a compressor, a housing and a vibration isolation mount located between the compressor and the housing. The compressor includes an impeller, a first inlet located upstream of the impeller, a first outlet located downstream of the impeller, a second inlet located downstream of the first outlet, and a second outlet located downstream of the second inlet. During operation, fluid enters the compressor via the first inlet and exits the compressor via the first outlet. The mount creates a restriction between the compressor and the housing that causes fluid exiting the first outlet to re-enter the compressor via the second inlet.

First claim

The invention claimed is:

1. A product comprising a compressor, a housing, and a vibration isolation mount located between the compressor and the housing, wherein the compressor comprises an impeller, a first inlet located upstream of the impeller, a first outlet located downstream of the impeller, a second inlet located downstream of the first outlet, and a second outlet located downstream of the second inlet, and during operation of the compressor fluid enters the compressor via the first inlet and exits the compressor via the first outlet, and the mount creates a restriction between the compressor and the housing that causes fluid exiting the first outlet to re-enter the compressor via the second inlet.

2. The product of claim 1 , wherein the impeller is a centrifugal impeller, fluid enters the compressor via the first inlet in an axial direction, and fluid exits the compressor via the first outlet in a radial direction.

3. The product of claim 1 , wherein a linear path is established between the outlet of the impeller and the first outlet.

4. The product of claim 1 , wherein the compressor comprises a diffuser and the first outlet surrounds the diffuser.

5. The product of claim 1 , wherein the first outlet comprises an annular opening formed around the compressor.

6. The product of claim 1 , wherein the compressor comprises an electric motor for driving the impeller, and the fluid flowing between the second inlet and the second outlet acts to cool one or more components of the motor.

7. The product of claim 6 , wherein the fluid flowing between the second inlet and the second outlet acts to cool an electrical winding or a power switch of the motor.

8. The product of claim 1 , wherein the mount surrounds the compressor and isolates the housing from radial vibration of the motor.

9. The product of claim 1 , wherein the mount forms a seal between the compressor and the housing such that all of the fluid exiting the compressor via the first outlet re-enters the compressor via the second inlet.

10. The product of claim 9 , wherein the mount comprises a plurality of ribs or studs that deform to absorb vibration from the compressor, and a lip seal for creating the seal between the compressor and the housing.

11. The product of claim 1 , wherein mount absorbs radial vibration and axial vibration and the mount creates a seal between the compressor and the housing at a position between the first inlet and the first outlet.

12. The product of claim 11 , wherein the mount turns fluid exiting the first outlet in a direction towards the second inlet.

13. The product of claim 1 , where the mount absorbs radial vibration and the product comprises a further mount for absorbing axial vibration, and the further mount creates a seal between the compressor and the housing at a position between the first inlet and the first outlet.

14. The product of claim 13 , wherein the further mount turns fluid exiting the first outlet in a direction towards the second inlet.

15. The product of claim 1 , wherein the product is a vacuum cleaner.

16. A product comprising a compressor, a housing, and one or more vibration isolation mounts located between the compressor and the housing, wherein the compressor comprises a first inlet, a first outlet located downstream of the first inlet, a second inlet located downstream of the first outlet, and a second outlet located downstream of the second inlet, the mounts create a first seal and a second seal between the compressor and the housing, the first seal is located between the first inlet and the first outlet, the second seal is located between the second inlet and the second outlet, and the compressor, the housing, the first seal and the second seal delimit a chamber that is open to the first outlet and the second inlet and is closed to the first inlet and the second outlet such that, during operation, fluid enters the compressor via the first inlet, exits the compressor and enters the enclosed chamber via the first outlet, exits the enclosed chamber and re-enters the compressor via the second inlet, and exits the compressor via the second outlet.

17. The product of claim 16 , wherein the product is a vacuum cleaner.

Assignees

• Dyson Technology Ltd

Inventors

• Hill Robert Stanley
• Clothier Andrew Charlton

Classifications

• F04D29/441

  especially adapted for elastic fluid pumps · CPC title

• A47L5/24 Primary

  Hand-supported suction cleaners · CPC title

• A47L9/0081

  Means for exhaust-air diffusion; Means for sound or vibration damping · CPC title

• F04D25/082

  the unit having provision for cooling the motor · CPC title

• H02K11/33

  Drive circuits, e.g. power electronics (H02K11/38 takes precedence) · CPC title