EP0245022A1
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EP
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Heat exchanger tube
Assignee: Garrett Corp
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Filing: 1987-04-29
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Granted: —
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Expires: 2007-04-29
Abstract
Abstract A heat exchanger (10) has a core (11) built up from a stack of layers. Each alternate layer consists of a tube (24) bult up from two identical U-shaped members (40, 41) having a folded and unfolded side. The unfolded side (44) of each is slid into the fold (48) of the other. Fins (30) are fitted in the tube (24). The intervening layers are defined between a pair of header bars (32) with fins (26) between them. Outer plates (28) and manifolds (20, 22) complete the heat exchanger (10).
Inventors
- 👤 Theodore Athony Kredo
Bibliographic Details
Application Number
—
Jurisdiction
EP
Data Source
google_patents
Last Synchronized
2026-11-06 00:49
CPC Classifications
F; F28; F28F; F28F3/00; F28F3/02; F28F3/025; F28D; F28D9/00; F28D9/0031; F28F9/00; F28F9/02; F28F2009/0285; F28F2009/029
Claims Analysis
Total Claims: 19
Claim 1
Independent Claim
63 words
A tube (24) for use in a heat exchanger (10), characterised in that the tube is formed from two elongate members (40, 42) of generally U-shaped section, each member having a base (41) and two sides (44, 45), of which one side (45) is folded to define a trough (48) for receiving the other side (44) of the other of the two members.
Claim 2
Dependent Claim
63 words
A tube (24) for use in a heat exchanger (10), characterised in that the tube is formed from two elongate members (40, 42) of generally U-shaped section, each member having a base (41) and two sides (44, 45), of which one side (45) is folded to define a trough (48) for receiving the other side (44) of the other of the two members.
Claim 3
Dependent Claim
16 words
A tube as claimed in Claim 1, in which the two members are similar or identical.
Claim 4
Dependent Claim
22 words
A tube as claimed in Claim 1 or Claim 2, in which each of the elongate members is folded from sheet material.
Claim 5
Dependent Claim
18 words
A tube as claimed in any of the preceding claims, including corrugated fins (30) fitted within the tube.
Claim 6
Dependent Claim
32 words
A tube as claimed in any of the preceding claims, in which each side of the tube has a thickness equal to at least several times the thickness of the base (41).
Claim 7
Dependent Claim
36 words
A heat exchanger in which a first fluid flow path is defined by a stack of tubes, each as claimed in any of the preceding claims, which are spaced apart in the stack by headers (32).
Claim 8
Dependent Claim
17 words
A heat exchanger as claimed in Claim 6 in which the headers are folded from sheet material.
Claim 9
Dependent Claim
47 words
A heat exchanger as claimed in Claim 6 or Claim 7, in which fins (26) occupy the space between adjacent stacked tubes, and between a pair of headers (32) holding the tubes in spaced relationship, the space occupied by the fins constituting a second fluid flow path.
Claim 10
Dependent Claim
21 words
A heat exchanger as claimed in Claim 8 including outer plates (28) defining the extreme spaces constituting second fluid flow paths.
Claim 11
Dependent Claim
36 words
A heat exchanger as claimed in any of Claims 7 to 9 in which each header comprises a web (34) and flanges (32) giving substantial stacking areas, even though the headers are formed from sheet material.
Claim 12
Dependent Claim
30 words
A heat exchanger as claimed in any of Claims 6 to 10, in which the elongate members, tubes, headers, fins and outer plates are brazed together in a unitary assembly.
Claim 13
Dependent Claim
42 words
A heat exchanger as claimed in any of Claims 6 to 11 including an inlet and an outlet manifold (16, 18) united with the heat exchanger core and in communication with one of the fluid flow paths, but not with the other.
Claim 14
Dependent Claim
28 words
A heat exchanger built up-from a number of components (40, 42, 26, 30, 32, and 28) all formed from sheet material and brazed together in a unitary assembly.
Claim 15
Dependent Claim
28 words
A heat exchanger built up-from a number of components (40, 42, 26, 30, 32, and 28) all formed from sheet material and brazed together in a unitary assembly.
Claim 16
Independent Claim
182 words
A method of constructing a heat exchanger core comprising the steps of: a) securing four corner posts to a surface at a predetermined distance from one another, each post having a squared cut-out portion; b) placing a side plate between said post on the surface; c) constructing a plurality of tubes having corrugated fins therein; d) placing two formed header bars atop said plates, each bar extending between two posts; e) placing an extended heat transfer element between said two formed header bars; f) placing a formed tube atop the spacer unit; g) repeating the above steps d, e and f until the heat exchanger core of the desired dimensions is constructed; placing two formed header bars atop said plates, each bar extending between two posts; placing an extended heat transfer element between said two formed header bars; and optionally placing a second side plate atop the last pair of formed header bars and extended heat transfer element; and brazing the two side plates, plurality of tubes, formed header bars and extended surface heat transfer elements together forming the heat exchanger core.
Claim 17
Independent Claim
182 words
A method of constructing a heat exchanger core comprising the steps of: a) securing four corner posts to a surface at a predetermined distance from one another, each post having a squared cut-out portion; b) placing a side plate between said post on the surface; c) constructing a plurality of tubes having corrugated fins therein; d) placing two formed header bars atop said plates, each bar extending between two posts; e) placing an extended heat transfer element between said two formed header bars; f) placing a formed tube atop the spacer unit; g) repeating the above steps d, e and f until the heat exchanger core of the desired dimensions is constructed; placing two formed header bars atop said plates, each bar extending between two posts; placing an extended heat transfer element between said two formed header bars; and optionally placing a second side plate atop the last pair of formed header bars and extended heat transfer element; and brazing the two side plates, plurality of tubes, formed header bars and extended surface heat transfer elements together forming the heat exchanger core.
Claim 18
Dependent Claim
61 words
The method according to Claim 14, wherein said steps of constructing a plurality of tubes comprises the steps of: forming members having a generally U-shaped cross-section including a base and an unfolded leg and a twice folded leg; placing a corrugated heat exchanger fin within a first member; and securing a second member to the first member to form the tube.
Claim 19
Dependent Claim
55 words
The method according to Claim 15, wherein said step of securing a second member to a first member comprises the steps of: rotating said second member 180° with respect to the length of said base; sliding the said unfolded leg of each member between the folds of the folded leg of the other . member.
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DE1953438A1
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US4350201A
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EP0117565A2
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