A pulsation damper for a vapour compression system

Patent metadata

Field	Value
Publication number	US-2017191703-A1
Application number	US-201515327076-A
Country	US
Kind code	A1
Filing date	May 27, 2015
Priority date	Aug 21, 2014
Publication date	Jul 6, 2017
Grant date	—

Abstract

A pulsation damper ( 1 ) comprising a first tube ( 4 ) and a second tube ( 5 ), e.g. arranged concentrically with respect to each other, the first tube ( 4 ) being arranged inside the second tube ( 5 ). The second tube ( 5 ) has a closed end, and the first tube ( 4 ) has a second end ( 7 ) arranged at a distance from the closed end ( 8 ) of the second tube ( 5 ). The first tube ( 4 ) is fluidly connected to the second tube ( 5 ) via the second end ( 7 ). The pulsation damper is capable of damping pressure pulses within a broad frequency range. Furthermore a vapour compression system ( 14 ) having a pulsation damper ( 1 ) arranged in an economizer line ( 20 ).

First claim

What is claimed is:

1 . A pulsation damper comprising:
a first connector and a second connector, each arranged to be connected into a fluid flow line in such a manner that fluid is received in the pulsation damper from the fluid flow line via the first or the second connector, and fluid is delivered to the fluid flow line from the pulsation damper via the second or first connector, a first tube having a first end being fluidly connected to the first connector and a second end arranged opposite the first end, and a second tube, the first tube being arranged inside the second tube, the second tube having a closed end, wherein the second end of the first tube is arranged inside the second tube at a distance from the closed end of the second tube, the first tube being fluidly connected to the second tube, via the second end of the first tube, and the second tube being fluidly connected to the second connector,
wherein the pulsation damper defines a fluid flow path through the pulsation damper from the first or second connector to the second or first connector, via the first tube and the second tube.

2 . The pulsation damper according to claim 1 , further comprising a third tube, the third tube being arranged between the first tube and the second tube, and the third tube having a first end arranged inside the second tube at a distance from the closed end of the second tube, the second tube being fluidly connected to the third tube via the first end of the third tube.

3 . The pulsation damper according to claim 2 , wherein the second tube is fluidly connected to the second connector via the third tube.

4 . The pulsation damper according to claim 3 , wherein the third tube comprises a second end arranged opposite the first end of the third tube, the second end of the third tube being fluidly connected to the second connector.

5 . The pulsation damper according to claim 4 , wherein a plurality of orifices are formed at the second end of the third tube, said orifices defining fluid passages between the third tube and the second connector.

6 . The pulsation damper according to claim 2 , wherein the third tube is shorter than the first tube, the first end of the third tube thereby being arranged further away from the closed end of the second tube than the second end of the first tube.

7 . The pulsation damper according to claim 1 , further comprising a filter device arranged in the fluid flow path through the pulsation damper.

8 . The pulsation damper according claim 1 , wherein the pulsation damper is arranged inside a housing, said housing further accommodating one or more further components.

9 . A vapour compression system comprising a compressor, a condenser, an expansion device and an evaporator arranged along a refrigerant path, and an economizer being fluidly connected to the compressor and to the condenser, the vapour compression system further comprising an economizer line fluidly interconnecting the economizer and the compressor, the economizer line having a pulsation damper arranged therein, wherein the pulsation damper defines an expansion chamber.

10 . The vapour compression system according to claim 9 , wherein the pulsation damper is a pulsation damper comprising:
a first connector and a second connector, each arranged to be connected into a fluid flow line in such a manner that fluid is received in the pulsation damper from the fluid flow line via the first or the second connector, and fluid is delivered to the fluid flow line from the pulsation damper via the second or first connector, a first tube having a first end being fluidly connected to the first connector and a second end arranged opposite the first end, and a second tube, the first tube being arranged inside the second tube, the second tube having a closed end, wherein the second end of the first tube is arranged inside the second tube at a distance from the closed end of the second tube, the first tube being fluidly connected to the second tube, via the second end of the first tube, and the second tube being fluidly connected to the second connector,
wherein the pulsation damper defines a fluid flow path through the pulsation damper from the first or second connector to the second or first connector, via the first tube and the second tube.

11 . The vapour compression system according to claim 9 , wherein the pulsation damper defines a fluid flow direction through the pulsation damper, which is transverse relative to a fluid flow direction in the first connector and/or the second connector.

12 . The vapour compression system according to claim 8 , wherein the compressor is a variable speed compressor.

13 . The vapour compression system according to claim 8 , wherein one or more further components are arranged in the economizer line, and wherein the pulsation damper is arranged between the compressor and the one or more further components.

14 . The pulsation damper according to claim 3 , wherein the third tube is shorter than the first tube, the first end of the third tube thereby being arranged further away from the closed end of the second tube than the second end of the first tube.

15 . The pulsation damper according to claim 4 , wherein the third tube is shorter than the first tube, the first end of the third tube thereby being arranged further away from the closed end of the second tube than the second end of the first tube.

16 . The pulsation damper according to claim 5 , wherein the third tube is shorter than the first tube, the first end of the third tube thereby being arranged further away from the closed end of the second tube than the second end of the first tube.

17 . The pulsation damper according to claim 2 , further comprising a filter device arranged in the fluid flow path through the pulsation damper.

18 . The pulsation damper according to claim 3 , further comprising a filter device arranged in the fluid flow path through the pulsation damper.

19 . The pulsation damper according to claim 4 , further comprising a filter device arranged in the fluid flow path through the pulsation damper.

20 . The pulsation damper according to claim 5 , further comprising a filter device arranged in the fluid flow path through the pulsation damper.

Assignees

• Danfoss As

Inventors

• Thomsen Carsten Mølhede
• Halldorsson Klaus
• Dam Bjarke Skovgård

Classifications

• F25B2500/13

  Vibrations · CPC title

• F25B1/10 Primary

  with multi-stage compression (with cascade operation F25B7/00) · CPC title

• F25B2500/12

  Sound · CPC title

• F25B2400/13

  Economisers · CPC title

• F25B41/062

  Mechanical Engineering · mapped topic