GB2126702A - Improvements relating to heat exchangers - Google Patents
Improvements relating to heat exchangers Download PDFInfo
- Publication number
- GB2126702A GB2126702A GB8225112A GB8225112A GB2126702A GB 2126702 A GB2126702 A GB 2126702A GB 8225112 A GB8225112 A GB 8225112A GB 8225112 A GB8225112 A GB 8225112A GB 2126702 A GB2126702 A GB 2126702A
- Authority
- GB
- United Kingdom
- Prior art keywords
- tubes
- clamping members
- heat exchanger
- arms
- matrix
- 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.)
- Granted
Links
- 239000011159 matrix material Substances 0.000 claims abstract description 17
- 238000001816 cooling Methods 0.000 claims description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims 1
- 230000010349 pulsation Effects 0.000 abstract description 3
- 239000007788 liquid Substances 0.000 abstract description 2
- 238000010276 construction Methods 0.000 description 2
- 239000012809 cooling fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000679 solder Inorganic materials 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
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
- F28F9/00—Casings; Header boxes; Auxiliary supports for elements; Auxiliary members within casings
- F28F9/001—Casings in the form of plate-like arrangements; Frames enclosing a heat exchange core
-
- 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
- F28D1/00—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators
- F28D1/02—Heat-exchange apparatus having stationary conduit assemblies for one heat-exchange medium only, the media being in contact with different sides of the conduit wall, in which the other heat-exchange medium is a large body of fluid, e.g. domestic or motor car radiators with heat-exchange conduits immersed in the body of fluid
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2225/00—Reinforcing means
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/26—Safety or protection arrangements; Arrangements for preventing malfunction for allowing differential expansion between elements
Abstract
A heat exchanger such as a motor vehicle radiator of the tube 5 and corrugated fin 6 type has clamping members 7 to hold the fin and tube matrix together to resist outward pressure pulsations. The clamping members are located in position by means of arms 9 which are rigidly connected to the rim 8 of a tube plate into which the tubes 5 are connected, or to any other part of the respective header tank. Sliding movement is permitted between the arms 9 and clamping members 7, so that differential thermal expansion between the clamping members 7 and the tubes 5 which have liquid running through them is taken up by the relative movement of the arms 9 and the clamping members 7. <IMAGE>
Description
SPECIFICATION
Improvements relating to heat exchangers
This invention relates to heat exchangers, especially to those suitable for use in vehicle cooling systems.
Such heat exchangers comprise a pair of header tanks, a plurality of tubes extending between the header tanks and airways located between the tubes, and clamping members parallel to the tubes on each side of the matrix.
The clamping members serve to resist expansion of the matrix under pressure pulsations in the tubes in use. They are sometimes rigidly connected to the header tanks so that they can perform this function.
This, however, causes problems since the tubes expand as the cooling fluid heats up but the clamping member does not, or at least not to the same extent. Consequently, the tube plate, that is, the part of the header tank into which the tubes pass, is stressed towards the regions adjacent to the clamping members.
The invention provides a heat exchanger which comprises a pair of header tanks, a plurality of tubes extending between the header tanks and airways located between the tubes, clamping members parallel to the tubes on each side of the matrix, and a pair of arms rigidly connected one to each end of each header tank which arms so engage the clamping members that each clamping member is held in contact with the matrix but each arm can slide relative to the associated clamping member in a direction parallel to the tubes.
With this arrangement, the clamping members can still clamp the matrix together, but the sliding movement ensures that the outer regions of the tube plate are not stressed despite the differential thermal expansion.
Advantageousiy, each clamping member is shorter than the tubes. Such a clamping member can also hold the matrix together in the typical matrix making machine, which is such that nothing longer than the tubes can be accommodated.
A heat exchanger for the engine cooling system of a motor vehicle, constructed in accordance with the invention, will now be described by way of example with reference to the accompanying drawings, in which:
Figure 1 is a front view of the heat exchanger;
Figure 2 is an enlarged view taken in the direction of the arrow a;
Figure 3 is a section through lines B-B of
Figure 2; and
Figure 4 is a section through lines C-C of
Figure 2;
The heat exchanger, that is, vehicle radiator, comprises a top header tank 1 having an outlet 2 and a bottom header tank 3 having an inlet 4.
Tubes 5 run between the header tanks and are interspersed with airways 6 consisting of a metal strip in zig-zag form. The matrix cf tubes and airways is clamped together at the side by means of two clamping members 7.
Each header tank is closed on the side nearest to the matrix by a plate, called a tube plate, into which the ends of the tubes 5 are soldered. Each tube plate has an upturned rim. The rim for the tube plate for the upper header tank has the reference numeral 8. The tubes 5 themselves are flattened in section.
In manufacture of the radiator, the tube and airway matrix is assembled between the two clamping members (held together by suitable means, for example, one or more ties of the form described and claimed in our co-pending United
Kingdom Patent Application No 82 20954) in a machine. The tubes 5 are coated with solder. The matrix including the clamping members 7 is then baked and in this way the tubes are soldered to the airways. The tube plates are only fitted in position once this assembly has been built up.
First, arms 9 are rivetted to the rim 8 of the upper tube plate, and similar arms are rivetted to the lower tube plate in the same way. When the tube plate 8 is placed over the ends of the tubes 5, care is taken to ensure that the arms 9 are inserted into the clamping members 7.
It will be seen from Figures 2 to 4 that each arm is of channel section, but has a part with a relatively wide base and shallow sides where it attaches to the tube plate and a part with a narrower base and deeper sides where it engages the clamping member. It will also be seen that the clamping member is of box section, although the box is not continuous. When the tube plates have been soldered to the tubes 5, the exterior of the lower parts of the arms 8 is in sliding fit with the interior of the clamping members 7 and the clamping members 7 are positively located against movement in the direction of the length of the tube plate. The clamping members 7 are thus held in a position where they clamp the matrix together.
In use of the radiator, pressure pulsations in the cooling system will case outward forces to develop on the clamping members 7, but these will be resisted by the clamping members by virtue of their connection via the arms 9 to the tube plates 8. The arrangement of the invention also has the advantage that differential thermal expansion between the clamping members 7 and the tubes 5 (the latter having liquid passing through them and the former not) will be taken up simply by sliding movement between the arms 9 and the clamping members 7. In this way stresses will be avoided on the tube plate and tubes 5 in the region of their ends which would occur if, as in some prior constructions, the clamping members 7 were welded directly, or rivetted directly to the tube plates 8.
A further advantage is that the clamping members 7, being shorter than the tubes 5, can be accommodated in a conventional matrix forming machine. Previously it was necessary in some constructions of radiator to have a clamping member in two parts, an inner one which could fit the matrix making machine and an outer one with specially shaped ends which would be secured directly to the tube plates. Obviously this called for two parts instead of one in accordance with the invention, but also special tooling for the outer part for each shape of radiator. The simple clamping member 7 can be rolled and can be cut to any desired length, and tooling costs for the radiator of the present invention are thereby significantly reduced.
If desired, instead of the arms 9 being rivetted to the rim 8 of the tube plates, they may be welded thereto, and the rivetting and welding may if desired be done directly to the remainder of the header tank.
Claims (6)
1. A heat exchanger which comprises a pair of header tanks, a plurality of tubes extending between the header tanks and airways located between the tubes, clamping members parallel to the tubes on each side of the matrix, and a pair of arms rigidly connected one to each end of each header tank which arms so engage the clamping members that each clamping member is held in contact with the matrix but each arm can slide relative to the associated clamping member in a direction parallel to the tubes.
2. A heat exchanger as claimed in claim 1, wherein each clamping member is shorter than the tubes.
3. A heat exchanger as claimed in claim 2, wherein the clamping members are rolled channel-section or box-section members.
4. A heat exchanger as claimed in any one of claims 1 to 3, wherein the arms are rigidly connected to tube plates of the header tanks.
5. A heat exchanger substantially as hereinbefore described with reference to and as shown in the accompanying drawings.
6. A motor vehicle having a heat exchanger in a water cooled engine cooling system, the heat exchanger being as claimed in any one of claims 1 to 5.
Priority Applications (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8225112A GB2126702B (en) | 1982-09-03 | 1982-09-03 | Improvements relating to heat exchangers |
EP83304056A EP0102715A3 (en) | 1982-09-03 | 1983-07-13 | Improvements relating to heat exchangers |
US06/527,810 US4534407A (en) | 1982-09-03 | 1983-08-30 | Heat exchangers |
JP16181083A JPS5971982A (en) | 1982-09-03 | 1983-09-02 | Heat exchanger |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
GB8225112A GB2126702B (en) | 1982-09-03 | 1982-09-03 | Improvements relating to heat exchangers |
Publications (2)
Publication Number | Publication Date |
---|---|
GB2126702A true GB2126702A (en) | 1984-03-28 |
GB2126702B GB2126702B (en) | 1985-08-29 |
Family
ID=10532666
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB8225112A Expired GB2126702B (en) | 1982-09-03 | 1982-09-03 | Improvements relating to heat exchangers |
Country Status (2)
Country | Link |
---|---|
JP (1) | JPS5971982A (en) |
GB (1) | GB2126702B (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2303437A (en) * | 1995-06-12 | 1997-02-19 | Ford Motor Co | Stress relief in heat exchangers |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1423854A (en) * | 1972-05-04 | 1976-02-04 | Chausson Usines Sa | Heat exchanger assembly |
GB1443725A (en) * | 1972-08-02 | 1976-07-21 | Chausson Usines Sa | Radiators |
GB1461638A (en) * | 1973-04-04 | 1977-01-13 | Chausson Usines Sa | Heat exchangers apparatus for making debossed displays in blanks |
WO1979000967A1 (en) * | 1978-04-24 | 1979-11-15 | Caterpillar Tractor Co | Floating radiator tank top |
-
1982
- 1982-09-03 GB GB8225112A patent/GB2126702B/en not_active Expired
-
1983
- 1983-09-02 JP JP16181083A patent/JPS5971982A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB1423854A (en) * | 1972-05-04 | 1976-02-04 | Chausson Usines Sa | Heat exchanger assembly |
GB1443725A (en) * | 1972-08-02 | 1976-07-21 | Chausson Usines Sa | Radiators |
GB1461638A (en) * | 1973-04-04 | 1977-01-13 | Chausson Usines Sa | Heat exchangers apparatus for making debossed displays in blanks |
WO1979000967A1 (en) * | 1978-04-24 | 1979-11-15 | Caterpillar Tractor Co | Floating radiator tank top |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2303437A (en) * | 1995-06-12 | 1997-02-19 | Ford Motor Co | Stress relief in heat exchangers |
US5954123A (en) * | 1995-06-12 | 1999-09-21 | Ford Global Technologies, Inc. | Heat exchanger |
Also Published As
Publication number | Publication date |
---|---|
JPS5971982A (en) | 1984-04-23 |
GB2126702B (en) | 1985-08-29 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PCNP | Patent ceased through non-payment of renewal fee |