US 2012/0055195 A1 · Internal Heat Exchanger Assembly Having an Internal Bleed Valve Assembly

Abstract

An internal heat exchanger assembly for an air conditioning system, having a substantial cylindrical cavity in which a helical coil tube is coaxially disposed within the cylindrical cavity. A bleed valve assembly is incorporated into the helical coiled tube, in which the bleed valve assembly is adapted to open at a predetermined differential pressure between the high pressure side and low pressure side of the internal heat exchanger. The bleed valve selectively bleeds refrigerant from the high pressure side to the low pressure side, thereby increasing the pressure and mass flow rate of the refrigerant to the suction side of a compressor to reduce or eliminate compressor rattle.

Claims14

Dependent claims

An internal heat exchanger assembly for an air conditioning system, comprising:

a housing having a first end, a second end opposed to said first end, and an interior surface therebetween defining an elongated cavity along an axis for low pressure refrigerant flow;
a tube for high pressure refrigerant flow disposed within said cavity;
and
a bleed valve assembly integrated into said tube, wherein said bleed valve assembly is adapted to open when the pressure differential between said high pressure refrigerant flow and said low pressure refrigerant flow drops below a predetermined threshold, thereby releasing high pressure refrigerant flow from said tube into said low pressure refrigerant flow within said cavity.

1 more element

An air conditioning system comprising,

a compressor for compressing a two phase refrigerant, wherein said compressor includes a low pressure suction side and a high pressure discharge side,
an internal heat exchanger having:
a housing defining a substantially cylindrical cavity in hydraulic communication with said low pressure suction side of compressor,
a helical coiled tube disposed within said substantially cylindrical cavity, wherein said helical coiled tube is in hydraulic communication with said high pressure side discharge side of compressor,
a bleed valve assembly integrated into said helical coiled tube, wherein said bleed valve assembly is adapted to open when the pressure differential between the high pressure discharge side and low pressure suction side drops below a predetermined threshold, thereby releasing refrigerant from said high pressure discharge side to said low pressure discharge side.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/126,786Filed 29 Oct 2009

Priority

29 Oct 2008

Published

8 Mar 2012

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

F25B 40/00
Subcoolers, desuperheaters or superheaters
F28D 7/024
The conduits being helically coiled: the conduits of only one medium being helically coiled tubes, the coils having a cylindrical configuration
F28D 7/10
Heat-exchange apparatus having stationary tubular conduit assemblies for both heat-exchange media, the media being in contact with different…
F25B 2400/0411
Refrigeration circuit bypassing means: for expansion valves or capillary tubes

Internal Heat Exchanger Assembly Having an Internal Bleed Valve Assembly

Life of this patent

Internal Heat Exchanger Assembly Having an Internal Bleed Valve Assembly

Life of this patent

Abstract

Claims14