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A HEAT EXCHANGER AND METHOD FOR MANUFACTURING SAME

IP.com Disclosure Number: IPCOM000186596D
Publication Date: 2009-Aug-27
Document File: 8 page(s) / 121K

Publishing Venue

The IP.com Prior Art Database

Abstract

In broad terms the invention comprises a heat exchanger including flow pathways for flow of a fluid to or from which heat is to be exchanged, defined between sections of the two parts which extend towards one another and intermesh to define the flow pathways between the intermeshing sections.

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A HEAT EXCHANGER AND METHOD FOR MANUFACTURING SAME

FIELD OF INVENTION

The invention relates to a heat exchanger and a method for manufacturing same.

BACKGROUND

In some heat exchangers which comprise fins over which a heat exchange fluid such as a liquid or a gas or gases pass to exchange heat between the fins and the fluid, in order to form the fins with narrow slots between defining the flow pathways for the heat exchange fluid, it is necessary to form the slots (which in turn defines the fins) by precision machining, which is relatively expensive as to manufacturing cost.

It is an object of the invention to provide an improved heat exchanger or to at least provide the public with a useful choice.

SUMMARY OF INVENTION

In broad terms the invention comprises a heat exchanger including flow pathways for flow of a fluid to or from which heat is to be exchanged, defined between sections of the two parts which extend towards one another and intermesh to define the flow pathways between the intermeshing sections. 

The invention may alternatively be said to comprise a heat exchanger including flow pathways for flow of a fluid to or from which heat is to be exchanged, defined between protrusions from one of the parts and recesses in the other of the parts, into which recesses the protrusions extend to define the flow pathways between facing surfaces of the protrusions and recesses.

Some of the sections, or the protrusions, may comprise fins.  Some of the sections, or the recesses, may comprise complementary shaped slots between fins of the other part, into which the fins of the first part extend. 

Typically the sections or protrusions/fins and recesses/slots extend longitudinally. 

Typically the protrusions/fins, and recesses/slots, are deeper in one dimension transverse to their length than they are wide across a perpendicular dimension transverse to their length. 

In an embodiment for one application of the heat exchanger, the two parts are annular, one having a greater diameter than the other such that one of the annular parts may fit within the other with said sections of the two parts extending towards one another and intermeshing to define the flow pathways between the intermeshing parts.  Protrusions/fins on an interior surface of the outer annular part intermesh with fins and protrusions on an exterior surface of the inner annular part.  Both parts and the fins and recesses thereon may extend longitudinally.  The inner annular part may be sized to fit over a body with which heat is to be exchanged, or may itself comprise an integral part of this body. 

In a further aspect the invention may be said to comprise a method for manufacturing a heat exchanger, comprising forming two parts of the heat exchanger with protrusions and recesses such as fins and slots which intermesh to define between the interme...