AU2008201297A1 - Heat exchange tubes - Google Patents
Heat exchange tubes Download PDFInfo
- Publication number
- AU2008201297A1 AU2008201297A1 AU2008201297A AU2008201297A AU2008201297A1 AU 2008201297 A1 AU2008201297 A1 AU 2008201297A1 AU 2008201297 A AU2008201297 A AU 2008201297A AU 2008201297 A AU2008201297 A AU 2008201297A AU 2008201297 A1 AU2008201297 A1 AU 2008201297A1
- Authority
- AU
- Australia
- Prior art keywords
- heat exchange
- section
- tube
- exchange tube
- opposed
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Abandoned
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F1/00—Tubular elements; Assemblies of tubular elements
- F28F1/08—Tubular elements crimped or corrugated in longitudinal section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/155—Making tubes with non circular section
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B21—MECHANICAL METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL; PUNCHING METAL
- B21C—MANUFACTURE OF METAL SHEETS, WIRE, RODS, TUBES OR PROFILES, OTHERWISE THAN BY ROLLING; AUXILIARY OPERATIONS USED IN CONNECTION WITH METAL-WORKING WITHOUT ESSENTIALLY REMOVING MATERIAL
- B21C37/00—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape
- B21C37/06—Manufacture of metal sheets, bars, wire, tubes or like semi-manufactured products, not otherwise provided for; Manufacture of tubes of special shape of tubes or metal hoses; Combined procedures for making tubes, e.g. for making multi-wall tubes
- B21C37/15—Making tubes of special shape; Making tube fittings
- B21C37/20—Making helical or similar guides in or on tubes without removing material, e.g. by drawing same over mandrels, by pushing same through dies ; Making tubes with angled walls, ribbed tubes and tubes with decorated walls
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- Geometry (AREA)
- Thermal Sciences (AREA)
- General Engineering & Computer Science (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
- Air-Conditioning For Vehicles (AREA)
Description
AUSTRALIA
Patents Act 1990 COMPLETE SPECIFICATION Standard Patent Applicant(s): BRIVIS AUSTRALIA PTY LTD Invention Title: HEAT EXCHANGE TUBES The following statement is a full description of this invention, including the best method for performing it known to me/us: P33934.AU.3 PwSetFiling Appficalon 20083-1g.do (M) 00 2 00 O HEAT EXCHANGE TUBES The present invention relates to a heat exchange tube and to a method of forming the heat exchange tube.
SThe present invention relates particularly, C1 although by no means exclusively, to a heat exchange tube Sfor a heater of the type which heats a stream of air 00 10 flowing through the heater by heat exchange between the air Sand heat generated by a burner assembly.
More particularly, although by no means exclusively, the present invention relates to a heat exchange tube for a heater of the type described in the preceding paragraph which forms part of a ducted space heating system for a domestic home. Heaters of this type generally include: a heat exchange chamber which has an inlet and an outlet for a stream of air to be heated; a burner assembly; and a heat exchange assembly which includes a plurality of heat exchange tubes coupled to the burner assembly and positioned in the heat exchange chamber so that hot combustion products from the burner assembly flow through the tubes and heat air flowing through the heat exchange chamber by heat exchange via the walls of the tubes.
The heat exchange assembly may include a series of relatively large diameter primary heat exchange tubes.
N:\lelboume\Cases\PatenL\33OOO33999xj33934 AU 3\Specis\BRIVIS HEAT EXCHANGE TUBEAdc 19103/08 00 3 O The heat exchange assembly may also include a manifold connected to outlet ends of the primary heat exchange tubes and a series of smaller diameter secondary heat exchange tubes connected to the manifold. With this arrangement hot combustion products from the burner assembly flow through the primary heat exchange tubes into the manifold and from the manifold through the secondary CI heat exchange tubes.
00 10 Generally, heat exchange tubes (primary and secondary) are formed either by bending round tubes or by CI pressing round tubes and then bending the tubes into various shapes that are selected to optimise heat transfer from hot combustion products to the tubes and heat transfer from the tubes to air flowing through the heat exchange chamber within the constraints of the available space in the chamber and other factors.
An object of the present invention is to provide an alternative configuration of a heat exchange tube.
Another object of the present invention is to provide an alternative method of forming the heat exchange tube.
According to the present invention there is provided a heat exchange tube which includes an inlet end, an outlet end, and a section between the inlet and outlet ends, which section includes two opposed longer sides and two opposed shorter sides and a series of spaced-apart parallel indentations in the longer sides that are transverse to the longitudinal dimension of the tube and are positioned so that adjacent indentations are in opposite longer sides, whereby the section defines a tortuous flow path.
Preferably the tortuous flow path section is a N W4clboume\CasesW\Patcnt 30.33999\P33934AU.3\Specis\BRIVIS HEAT EXCHANGE TUBE doc 19/03/0 0- 4 00 Ssubstantial part of the length of the tube.
SPreferably the tortuous flow path section is at least 80% of the length of the tube.
The heat exchange tube may be a primary heat exchange tube and/or a secondary heat exchange tube for a C heater of the type described above.
00 10 According to the present invention there is also provided a method of forming a heat exchange tube which c( includes a step of pressing a section of a tube between opposed faces of a press, which faces have parallel ridges that are positioned so that the ridges on one face are parallel to but offset laterally from the ridges of the other face, and forming a flattened pressed section that has two opposed longer sides and two opposed shorter sides and a series of transverse parallel indentations formed in the opposed longer sides which cause the pressed section to define a tortuous flow path through the pressed section.
Accordingly to the present invention there is also provided a heater, more preferably a heater for a ducted space heating system, which includes a plurality of the above-described heat exchange tube.
The present invention is described further with reference to the accompanying drawings, of which: Figure 1 is a top plan view of a preferred embodiment of a heat exchange tube in accordance with the present invention; and Figure 2 is a side elevation of the heat exchange tube shown in Figure 1.
The heat exchange tube shown in the figures is N:\Melboume\Ca$sesatent\3000-33999\P33934.AU.3,Specis\B VIS HEAT EXCHANGE TUBE.doc 19/03/0O -O 5 O 00 O suitable particularly for use as a heat exchange tube in a heater that forms part of a ducted space heating system for t a domestic home and the heat exchange tube is described in this context.
Australian patent applications 59452/98, 59454/98 and 59455/98 describe an example of such a heater and a C- space heating system, and the disclosure in the patent specifications of these patent applications is incorporated 0 10 herein by cross-reference.
00 Ci In such a space heating system, typically, the heater heats a stream of air as it flows through a heat exchange chamber in the heater. Typically, the air is drawn into the chamber by a return air duct in the home or from outside the home and the heated air generated in the heater is distributed through the home via a duct network.
Typically, the air is heated by heat exchange with hot combustion products that are generated by a gas-fired burner assembly of the heater and then flow through an assembly of primary and secondary heat exchange tubes arranged in the heat exchange chamber in the flow path of air through the chamber.
The heat exchange tube shown in the figures includes: an inlet end 3; an outlet end 5; and a central section 7 that forms a substantial part, typically at least 80%, of the length of the tube.
The inlet and outlet ends 3, 5 have circular cross-sections and the central section 7 has a non-circular N \Melboume\Cases\Patenl\33000-33999\P33934 AU 3SpecisBRIVIS HEAT EXCHANGE TUBE doc 19/03/08 00 -6- 00 O cross-section with two longer sides 9 and two shorter sides 11.
In addition, the central section 7 has a series of spaced-apart parallel indentations 13 in the longer sides 9. The indentations 13 are perpendicular to the length dimension of the tube and are positioned so that C adjacent indentations 13 are in opposite longer sides 9 of the central section 7. The arrangement of the indentations 00 10 13 is such that the central section 7 defines a tortuous flow path which promotes turbulent flow of combustion CI products through the tube and thereby optimises heat transfer from the hot combustion products to the walls of the tube.
In accordance with a preferred embodiment of the method of the present invention, the central section 7 of the heat exchange tube is formed by pressing a round tube between opposed faces of a press which has parallel ridges on the faces of the press so that, simultaneously, the tube is pressed along the length of the pressed section and is indented at spaced intervals along the length of the pressed section.
The press may be of any suitable construction and may be operated under any suitable operating conditions.
Many modifications may be made to the preferred embodiments of the heat exchange tube and the method of forming the heat exchange tube described above without departing from the spirit and scope of the present invention.
In this connection, whilst the preferred embodiment includes indentations 13 that are perpendicular to the length dimension of the tube, the present invention is not limited to this arrangement and extends to any N\MclbournCases\Patent3000-33999\P33934.AU.YSpcisRIVIS.- HEAT EXCHANGE TUIBEdoc 19/03/08 007 arrangement in which the indentations are transverse to the length dimension of the tube.
00 N:\Mciboume\CasPatent3O -33999\P33934.AU3Spccis\BgIVIS HEAT EXCHANGE TUBEdoc 19/03108
Claims (4)
1. A heat exchange tube which includes an inlet end, an outlet end, and a section between the inlet and outlet ends, which section includes two opposed longer sides and two opposed shorter sides and a series of spaced- apart parallel indentations in the longer sides that are CI transverse to the longitudinal dimension of the tube and are positioned so that adjacent indentations are in 00 10 opposite longer sides, whereby the section defines a tortuous flow path.
2. The heat exchange tube defined in claim 1 wherein the tortuous flow path section is a substantial part of the length of the tube.
3. The heat exchange tube defined in claim 2 wherein the tortuous flow path section is at least 80% of the length of the tube.
4. A method of forming a heat exchange tube which includes a step of pressing a section of a tube between opposed faces of a press, which faces have parallel ridges that are positioned so that the ridges on one face are parallel to but offset laterally from the ridges of the other face, and forming a flattened pressed section that has two opposed longer sides and two opposed shorter sides and a series of transverse parallel indentations formed in the opposed longer sides which cause the pressed section to define a tortuous flow path through the pressed section. A heater for a ducted space heating system which includes a plurality of the heat exchange tube defined in any one of the preceding claims. N:elbourmecCases\Pateni\330OO-33999\P33934 AU 3Specs VS HEAT EXCHANGE TUBEdoc 190/08
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AU2008201297A AU2008201297A1 (en) | 1999-03-24 | 2008-03-19 | Heat exchange tubes |
| AU2011201517A AU2011201517A1 (en) | 1999-03-24 | 2011-04-04 | Heat exchange tubes |
Applications Claiming Priority (5)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AUPP9386A AUPP938699A0 (en) | 1999-03-24 | 1999-03-24 | Heat exchange tubes |
| AUPP9386 | 1999-03-24 | ||
| AU22566/00A AU2256600A (en) | 1999-03-24 | 2000-03-24 | Heat exchange tubes |
| AU2005201519A AU2005201519A1 (en) | 1999-03-24 | 2005-04-11 | Heat exchange tubes |
| AU2008201297A AU2008201297A1 (en) | 1999-03-24 | 2008-03-19 | Heat exchange tubes |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2005201519A Division AU2005201519A1 (en) | 1999-03-24 | 2005-04-11 | Heat exchange tubes |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2011201517A Division AU2011201517A1 (en) | 1999-03-24 | 2011-04-04 | Heat exchange tubes |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| AU2008201297A1 true AU2008201297A1 (en) | 2008-04-17 |
Family
ID=3813582
Family Applications (5)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AUPP9386A Abandoned AUPP938699A0 (en) | 1999-03-24 | 1999-03-24 | Heat exchange tubes |
| AU22566/00A Abandoned AU2256600A (en) | 1999-03-24 | 2000-03-24 | Heat exchange tubes |
| AU2005201519A Abandoned AU2005201519A1 (en) | 1999-03-24 | 2005-04-11 | Heat exchange tubes |
| AU2008201297A Abandoned AU2008201297A1 (en) | 1999-03-24 | 2008-03-19 | Heat exchange tubes |
| AU2011201517A Abandoned AU2011201517A1 (en) | 1999-03-24 | 2011-04-04 | Heat exchange tubes |
Family Applications Before (3)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AUPP9386A Abandoned AUPP938699A0 (en) | 1999-03-24 | 1999-03-24 | Heat exchange tubes |
| AU22566/00A Abandoned AU2256600A (en) | 1999-03-24 | 2000-03-24 | Heat exchange tubes |
| AU2005201519A Abandoned AU2005201519A1 (en) | 1999-03-24 | 2005-04-11 | Heat exchange tubes |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| AU2011201517A Abandoned AU2011201517A1 (en) | 1999-03-24 | 2011-04-04 | Heat exchange tubes |
Country Status (1)
| Country | Link |
|---|---|
| AU (5) | AUPP938699A0 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113378404B (en) * | 2021-06-29 | 2022-09-30 | 上海电气电站设备有限公司 | Segmented thermal calculation method for heat exchanger |
-
1999
- 1999-03-24 AU AUPP9386A patent/AUPP938699A0/en not_active Abandoned
-
2000
- 2000-03-24 AU AU22566/00A patent/AU2256600A/en not_active Abandoned
-
2005
- 2005-04-11 AU AU2005201519A patent/AU2005201519A1/en not_active Abandoned
-
2008
- 2008-03-19 AU AU2008201297A patent/AU2008201297A1/en not_active Abandoned
-
2011
- 2011-04-04 AU AU2011201517A patent/AU2011201517A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| AU2011201517A1 (en) | 2011-04-21 |
| AU2005201519A1 (en) | 2005-05-05 |
| AU2256600A (en) | 2000-09-28 |
| AUPP938699A0 (en) | 1999-04-15 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PC1 | Assignment before grant (sect. 113) |
Owner name: CARRIER AIR CONDITIONING PTY LTD Free format text: FORMER APPLICANT(S): BRIVIS AUSTRALIA PTY LTD |
|
| MK5 | Application lapsed section 142(2)(e) - patent request and compl. specification not accepted |