CA2543382A1 - Heat exchanger - Google Patents
Heat exchanger Download PDFInfo
- Publication number
- CA2543382A1 CA2543382A1 CA002543382A CA2543382A CA2543382A1 CA 2543382 A1 CA2543382 A1 CA 2543382A1 CA 002543382 A CA002543382 A CA 002543382A CA 2543382 A CA2543382 A CA 2543382A CA 2543382 A1 CA2543382 A1 CA 2543382A1
- Authority
- CA
- Canada
- Prior art keywords
- heat exchanger
- air
- elements
- planar
- webs
- 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
- 238000004519 manufacturing process Methods 0.000 claims abstract description 11
- 238000000034 method Methods 0.000 claims abstract description 9
- 238000012544 monitoring process Methods 0.000 claims description 2
- 125000006850 spacer group Chemical group 0.000 claims description 2
- 238000010438 heat treatment Methods 0.000 description 13
- 239000004020 conductor Substances 0.000 description 6
- 238000001816 cooling Methods 0.000 description 3
- 238000004378 air conditioning Methods 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000005476 soldering Methods 0.000 description 1
Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B3/00—Ohmic-resistance heating
- H05B3/10—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor
- H05B3/16—Heating elements characterised by the composition or nature of the materials or by the arrangement of the conductor the conductor being mounted on an insulating base
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
- F24H3/00—Air heaters
- F24H3/02—Air heaters with forced circulation
- F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
- F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F3/00—Plate-like or laminated elements; Assemblies of plate-like or laminated elements
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D2021/0019—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for
- F28D2021/0021—Other heat exchangers for particular applications; Heat exchange systems not otherwise provided for for aircrafts or cosmonautics
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2255/00—Heat exchanger elements made of materials having special features or resulting from particular manufacturing processes
- F28F2255/02—Flexible elements
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
Abstract
This invention relates to an air heat exchanger in air diffuser systems with flexible planar heat exchanger elements, in particular for use in aircraft. In accordance with the invention, the individual planar heat exchanger elements are connected with each other by means of webs. The invention furthermore relates to a method for manufacturing air heat exchangers as well as to a use thereof.
Description
HEAT EXCHANGER
This invention relates to an air heat exchanger in air diffuser systems with flexible planar heat exchanger elements, in particular for use in aircraft.
For heating the air, heaters are incorporated in air diffuser systems. For safety reasons, heating elements with high surface temperatures are undesirable in the aircraft industry. Therefore, so-called panel heating elements are being used.
Due to their large surface area, the same are capable of transferring a high thermal power despite low temperatures. The objective is to install a rather large surface area on a small space, in order to be able to transfer as much heat as possible.
Output of the thermal power should be effected in a controlled way, and inadmissible excess temperatures should be avoided. This is ensured by the use of sensors and fuses. Therefore, the elements should be producible at low cost and should achieve a rather high performance with a low weight and a small size.
Air heaters with a structure as shown in the attached Figure 1 are known already.
In an air-conducting tube 12 to be heated, flexible panel heating elements 10 are inserted, which in the illustrated embodiment are arranged parallel to each other.
In this case, the panel heating elements constitute free-standing plates. As an alternative to the illustrated embodiment, the panel heating elements can also consist of coaxially arranged tubes. There can also be provided heat-dissipating cooling bodies, for instance in the form of heat exchanger lamellae.
These prior art systems involve a very high contacting effort, as the individual panel heating elements must be connected with each other via soldering points, plug-in connections and the like. As a result, the risk of defects is substantially increased during the manufacture of such elements. In particular the manufacture of coaxial panel heating elements involves a substantially higher mounting effort as compared to plate-shaped elements.
It is the object of the present invention to create an air heat exchanger which is comparatively easier to manufacture and to install.
In accordance with the invention, this object is solved by an air heat exchanger with the features as claimed in claim 1. Accordingly, the individual planar heat
This invention relates to an air heat exchanger in air diffuser systems with flexible planar heat exchanger elements, in particular for use in aircraft.
For heating the air, heaters are incorporated in air diffuser systems. For safety reasons, heating elements with high surface temperatures are undesirable in the aircraft industry. Therefore, so-called panel heating elements are being used.
Due to their large surface area, the same are capable of transferring a high thermal power despite low temperatures. The objective is to install a rather large surface area on a small space, in order to be able to transfer as much heat as possible.
Output of the thermal power should be effected in a controlled way, and inadmissible excess temperatures should be avoided. This is ensured by the use of sensors and fuses. Therefore, the elements should be producible at low cost and should achieve a rather high performance with a low weight and a small size.
Air heaters with a structure as shown in the attached Figure 1 are known already.
In an air-conducting tube 12 to be heated, flexible panel heating elements 10 are inserted, which in the illustrated embodiment are arranged parallel to each other.
In this case, the panel heating elements constitute free-standing plates. As an alternative to the illustrated embodiment, the panel heating elements can also consist of coaxially arranged tubes. There can also be provided heat-dissipating cooling bodies, for instance in the form of heat exchanger lamellae.
These prior art systems involve a very high contacting effort, as the individual panel heating elements must be connected with each other via soldering points, plug-in connections and the like. As a result, the risk of defects is substantially increased during the manufacture of such elements. In particular the manufacture of coaxial panel heating elements involves a substantially higher mounting effort as compared to plate-shaped elements.
It is the object of the present invention to create an air heat exchanger which is comparatively easier to manufacture and to install.
In accordance with the invention, this object is solved by an air heat exchanger with the features as claimed in claim 1. Accordingly, the individual planar heat
-2-exchanger elements are connected with each other by means of webs. These webs themselves are unheated. Inside these webs, conductors are disposed, which connect the individual heat exchanger conductors in the individual surfaces with each other. The webs only serve the mechanical connection of the planar heat exchanger elements. The corresponding conductors usually - but not necessarily - are electric conductors.
Advantageous aspects of the invention can be taken from the sub-claims following the main claim.
Accordingly, the planar heat exchanger elements can have a variable design in terms of shape, size and heat exchanger performance. Thus, they can result in a much better utilization of the flow cross-section of the air-conducting conduit. In certain portions of round tubes, for instance, flow can be greater, so that they can provide a greater heat exchanger performance.
To effect a uniform surface temperature of the flexible heat exchanger elements in the direction of the traversed length, the same can also be equipped with a variable power density along their length. With a specified maximum temperature, which should not be exceeded, a uniform temperature can thus be adjusted along the length of the tube.
Particularly advantageously, additional heat exchanging bodies are provided, for instance plates and/or ribs. The additional heat exchanging bodies can be used both as supports and as spacers for the planar heat exchanger elements.
The above-mentioned object of the present invention is solved in particular by a method as claimed in claim 8. Accordingly, the planar heat exchanger elements are manufactured together with the webs connecting the same as an integral element.
Particularly advantageous aspects of this method can be taken from the sub-claims following method claim 8. Accordingly, the sensors or other fuses for monitoring the temperature as well as connecting lines leading to the same can be integrated right during the manufacturing process of the planar heat exchanger elements and the webs connecting the same.
Advantageous aspects of the invention can be taken from the sub-claims following the main claim.
Accordingly, the planar heat exchanger elements can have a variable design in terms of shape, size and heat exchanger performance. Thus, they can result in a much better utilization of the flow cross-section of the air-conducting conduit. In certain portions of round tubes, for instance, flow can be greater, so that they can provide a greater heat exchanger performance.
To effect a uniform surface temperature of the flexible heat exchanger elements in the direction of the traversed length, the same can also be equipped with a variable power density along their length. With a specified maximum temperature, which should not be exceeded, a uniform temperature can thus be adjusted along the length of the tube.
Particularly advantageously, additional heat exchanging bodies are provided, for instance plates and/or ribs. The additional heat exchanging bodies can be used both as supports and as spacers for the planar heat exchanger elements.
The above-mentioned object of the present invention is solved in particular by a method as claimed in claim 8. Accordingly, the planar heat exchanger elements are manufactured together with the webs connecting the same as an integral element.
Particularly advantageous aspects of this method can be taken from the sub-claims following method claim 8. Accordingly, the sensors or other fuses for monitoring the temperature as well as connecting lines leading to the same can be integrated right during the manufacturing process of the planar heat exchanger elements and the webs connecting the same.
-3-Upon manufacture of the planar heat exchanger elements and the webs of each element, the same is bent into its final shape. As far as the heat exchanger element is incorporated in a pipe conduit, the same will afterwards be inserted into the pipe conduit. In accordance with the inventive aspect of the air heat exchanger, it is no longer necessary to connect each individual planar heat exchanger element separately. Rather, it is sufficient to connect the entire planar heat exchanger element to the heat exchanger fluid conduit.
Particularly advantageously, the aforementioned air heat exchanger is used as air heater, preferably for use in aircraft.
Further details, features and advantages of the invention will be illustrated with reference to an embodiment shown in the drawing, in which:
Fig. 1 shows a partly sectioned air heat exchanger in accordance with the prior art; and Fig. 2 shows several views of a part of an air heat exchanger in various structural conditions in accordance with the present invention.
In Figs. 2a to 2c, the various manufacturing steps of an air heat exchanger 20 are shown. The same first of all consists of a number of planar heat exchanger elements 10, which are each connected with each other by means of webs 14.
The webs 14 substantially have the same structure as the heat exchanger elements 10, which in the present embodiment constitute panel heating elements.
Instead of corresponding panel heating elements, the same can of course also constitute panel cooling elements when used in an air conditioning system.
In a manner not illustrated here, the webs include unheated conductors, which connect the heating conductors of the individual flexible heat exchanger elements 10. In principle, the unheated webs 14 have the same structure as the individual flexible heating elements 10, whereby they can be manufactured in one and the same work process. This allows to simultaneously manufacture a plurality of flexible heating elements 10 together with the necessary unheated webs 14 in the same process. After the manufacturing process in flat position, as shown in Fig.
2a, the heat exchanger elements 10 are bent around the respective webs 14, as is
Particularly advantageously, the aforementioned air heat exchanger is used as air heater, preferably for use in aircraft.
Further details, features and advantages of the invention will be illustrated with reference to an embodiment shown in the drawing, in which:
Fig. 1 shows a partly sectioned air heat exchanger in accordance with the prior art; and Fig. 2 shows several views of a part of an air heat exchanger in various structural conditions in accordance with the present invention.
In Figs. 2a to 2c, the various manufacturing steps of an air heat exchanger 20 are shown. The same first of all consists of a number of planar heat exchanger elements 10, which are each connected with each other by means of webs 14.
The webs 14 substantially have the same structure as the heat exchanger elements 10, which in the present embodiment constitute panel heating elements.
Instead of corresponding panel heating elements, the same can of course also constitute panel cooling elements when used in an air conditioning system.
In a manner not illustrated here, the webs include unheated conductors, which connect the heating conductors of the individual flexible heat exchanger elements 10. In principle, the unheated webs 14 have the same structure as the individual flexible heating elements 10, whereby they can be manufactured in one and the same work process. This allows to simultaneously manufacture a plurality of flexible heating elements 10 together with the necessary unheated webs 14 in the same process. After the manufacturing process in flat position, as shown in Fig.
2a, the heat exchanger elements 10 are bent around the respective webs 14, as is
-4-shown in Fig. 2b. This results in a stack of planar heat exchanger elements, which can for instance be inserted in a pipe conduit.
Advantageously, the planar heat exchanger elements 10 each can have a different width, which is not illustrated here in greater detail. As a result, they are adapted better to the interior of the pipe. As is for instance indicated in Fig. 2c, the flexible planar heat exchanger elements 10 can be connected with heat exchanging bodies 16, which dissipate the heat through convection to the surrounding medium, e.g. air. In addition, there can also be provided heat exchanging ribs, which cannot be seen in Fig. 2c. The cooling bodies, in particular in the form of ribs, can at the same time be used as supports for the flexible planar heat exchanger elements. This provides for a very compact construction.
Advantageously, the planar heat exchanger elements 10 each can have a different width, which is not illustrated here in greater detail. As a result, they are adapted better to the interior of the pipe. As is for instance indicated in Fig. 2c, the flexible planar heat exchanger elements 10 can be connected with heat exchanging bodies 16, which dissipate the heat through convection to the surrounding medium, e.g. air. In addition, there can also be provided heat exchanging ribs, which cannot be seen in Fig. 2c. The cooling bodies, in particular in the form of ribs, can at the same time be used as supports for the flexible planar heat exchanger elements. This provides for a very compact construction.
Claims (12)
1. An air heat exchanger in air diffuser systems, comprising flexible planar heat exchanger elements, in particular for use in aircraft, characterized in that the individual planar heat exchanger elements are connected with each other by means of webs.
2. The air heat exchanger as claimed in claim 1, characterized in that the webs are made of a flexible, bendable material.
3. The air heat exchanger as claimed in any of claims 1 or 2, characterized in that the webs have the same structure as the planar heat exchanger elements.
4. The air heat exchanger as claimed in any of the preceding claims, characterized in that the planar heat exchanger elements have a variable design in terms of shape, size and heat exchanger performance.
5. The air heat exchanger as claimed in any of the preceding claims, characterized in that the planar heat exchanger elements have a variable heat exchanger performance along their length, in order to achieve a uniform surface temperature in the direction of the traversed length.
6. The air heat exchanger as claimed in any of the preceding claims, characterized in that the planar heat exchanger elements are connected with additional heat exchanging bodies, preferably in the form of plates and/or ribs.
7. The air heat exchanger as claimed in any of the preceding claims, characterized in that the planar heat exchanger elements constitute plates.
8. The air heat exchanger as claimed in any of the preceding claims, characterized in that the additional heat exchanging bodies are used as supports and as spacers for the planar heat exchanger elements.
9. A method for manufacturing an air heat exchanger as claimed in any of claims 1 to 8, characterized in that the planar heat exchanger elements together with the webs connecting the same are fabricated as an integral element.
10. The method as claimed in claim 9, characterized in that sensors for monitoring the temperature as well as their connecting lines are integrated into the planar heat exchanger elements during the manufacturing process.
11. The method as claimed in any of the preceding claims, characterized in that the planar heat exchanger elements are first manufactured in a flat position together with the webs connecting the same and are then bent into the final shape and possible inserted into a pipe conduit.
12. Use of an air heat exchanger as claimed in any of the preceding claims as an air heater.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE102005018050.7 | 2005-04-19 | ||
| DE102005018050A DE102005018050A1 (en) | 2005-04-19 | 2005-04-19 | Air heat exchanger |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CA2543382A1 true CA2543382A1 (en) | 2006-10-19 |
Family
ID=36685986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CA002543382A Abandoned CA2543382A1 (en) | 2005-04-19 | 2006-04-13 | Heat exchanger |
Country Status (4)
| Country | Link |
|---|---|
| US (1) | US20060237180A1 (en) |
| EP (1) | EP1715272A1 (en) |
| CA (1) | CA2543382A1 (en) |
| DE (1) | DE102005018050A1 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110763049B (en) | 2018-07-26 | 2023-08-08 | 达纳加拿大公司 | Heat exchanger with parallel flow features to enhance heat transfer |
Family Cites Families (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FI47141C (en) * | 1960-03-16 | 1973-09-10 | Rosenblad | Heat exchange system for two heat exchanging media of different pressures. |
| US3341925A (en) * | 1963-06-26 | 1967-09-19 | Gen Motors Corp | Method of making sheet metal heat exchangers with air centers |
| GB1201715A (en) * | 1967-04-19 | 1970-08-12 | Mtu Muenchen Gmbh | Improved heat exchanger |
| GB1442754A (en) * | 1972-06-28 | 1976-07-14 | Nat Res Dev | Apparatus for and method of effecting heat or mass transfer berween fluids |
| FR2334932A1 (en) * | 1975-12-09 | 1977-07-08 | Ussi Const Usines Separation I | Heat exchanger battery using plastics pockets - has pockets clamped between bars on fixed and moving frames to allow expansion |
| US4258785A (en) * | 1980-02-08 | 1981-03-31 | Borg-Warner Corporation | Heat exchanger interplate fitting |
| JPH02146497A (en) * | 1988-11-26 | 1990-06-05 | Kajima Corp | Flexible film type heat exchanger |
| SE465894B (en) * | 1989-09-15 | 1991-11-11 | Sten Zeilon | HEAT EXCHANGER WITH TIGHTENING MEMBRANE AND GAS TRANSMISSIBLE DISTANCE BODIES |
| US5507338A (en) * | 1995-08-30 | 1996-04-16 | Ford Motor Company | Tab for an automotive heat exchanger |
| US5855240A (en) * | 1998-06-03 | 1999-01-05 | Ford Motor Company | Automotive heat exchanger |
| US6244333B1 (en) * | 1998-08-27 | 2001-06-12 | Zeks Air Drier Corporation | Corrugated folded plate heat exchanger |
| JP4732609B2 (en) * | 2001-04-11 | 2011-07-27 | 株式会社ティラド | Heat exchanger core |
-
2005
- 2005-04-19 DE DE102005018050A patent/DE102005018050A1/en not_active Withdrawn
-
2006
- 2006-04-12 EP EP06007702A patent/EP1715272A1/en not_active Withdrawn
- 2006-04-13 CA CA002543382A patent/CA2543382A1/en not_active Abandoned
- 2006-04-18 US US11/406,817 patent/US20060237180A1/en not_active Abandoned
Also Published As
| Publication number | Publication date |
|---|---|
| EP1715272A1 (en) | 2006-10-25 |
| US20060237180A1 (en) | 2006-10-26 |
| DE102005018050A1 (en) | 2006-10-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| FZDE | Discontinued |