EP0242116A2 - Wärmetauscher - Google Patents

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Publication number
EP0242116A2
EP0242116A2 EP87303035A EP87303035A EP0242116A2 EP 0242116 A2 EP0242116 A2 EP 0242116A2 EP 87303035 A EP87303035 A EP 87303035A EP 87303035 A EP87303035 A EP 87303035A EP 0242116 A2 EP0242116 A2 EP 0242116A2
Authority
EP
European Patent Office
Prior art keywords
recess
retaining member
header tank
shell
projection
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.)
Withdrawn
Application number
EP87303035A
Other languages
English (en)
French (fr)
Other versions
EP0242116A3 (de
Inventor
Graham Gerald Lardner
Michael Douglas Seagrave
Henry Clifford Rees Price
Derek Jenkins
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Rover Co Ltd
Original Assignee
Rover Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Rover Co Ltd filed Critical Rover Co Ltd
Publication of EP0242116A2 publication Critical patent/EP0242116A2/de
Publication of EP0242116A3 publication Critical patent/EP0242116A3/de
Withdrawn legal-status Critical Current

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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
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F28F9/0256—Arrangements for coupling connectors with flow lines
    • F28F9/0258—Arrangements for coupling connectors with flow lines of quick acting type, e.g. with snap action
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F21/00—Constructions of heat-exchange apparatus characterised by the selection of particular materials
    • F28F21/06—Constructions of heat-exchange apparatus characterised by the selection of particular materials of plastics material
    • F28F21/067—Details
    • 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
    • F28F9/02—Header boxes; End plates
    • F28F9/0246—Arrangements for connecting header boxes with flow lines
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F2275/00—Fastening; Joining
    • F28F2275/08—Fastening; Joining by clamping or clipping
    • F28F2275/085—Fastening; Joining by clamping or clipping with snap connection

Definitions

  • This invention relates to a header tank for a heat exchanger, eg a motor vehicle radiator, and particularly to the fitting of a component such as a thermostat into a plastics header tank shell.
  • a known security device comprises a cap which is attached by a bayonet fitting to a substantially cylindrical projection provided around the aperture in the side face of the shell.
  • a rib is usually provided on the header tank shell on to which a portion of a tube plate is clenched to connect the header tank shell to the rest of the radiator.
  • the header tank shell is made from a plastics material by die casting, a raised area must be provided between the cylindrical projection and the rib to allow the cast shell to be removed from the die.
  • header tank shell can be formed by a die-casting method without leaving any raised portion adjacent the fitting for the component to obstruct proper clenching between the shell and a tube plate.
  • FIG. 1 With reference to Figure 1 there is shown a prior art header tank shell 1A formed of a plastics material and having a side face 2A and a rib 3A.
  • the shell 1A is also formed with a raised cylindrical water inlet 5A and a raised cylindrical boss 6A for receiving a thermostat (not shown).
  • this raised portion 12A prevents the rib 3A being used as a means of securing between the points X and Y.
  • Figure 1A is a plan view of part of a header tank shell 1 of a first embodiment of the invention.
  • the shell 1 is formed of a plastics material and has a side face 2 a rib 3 extending along an edge of the side face 2 to which a tube plate 4 (see Figure 2) is clenched when the shell 1 is assembled in a radiator.
  • FIG. 1 Another rib 3 is provided along an edge of the opposite side face of the shell as shown in Figure 2.
  • the shell 1 is also formed with a water inlet (or outlet) 5, which comprises an aperture surrounded by a cylindrical member which projects from the side face 2, and a recess 6 for receiving a component such as a thermostat 7 (see Figure 2).
  • the recess 6 comprises a screw thread 8 in its side walls, a shoulder 9 and a circular aperture 10.
  • Figure 1 also shows a bracket 11 for use in mounting the radiator in a motor vehicle.
  • the raised portion 12 is provided to enable the shell 1 to be formed by a die casting process in which the die is moved away upwardly (in the orientation shown in the drawing) when the shell is removed therefrom. If the raised portion 12 were not provided, the shell I could not be formed in this way since there would be a recess between the rib 3 and the inlet 5 which would prevent the shell 1 from being withdrawn from the die. It will be appreciated that a similar raised portion has to be provided between any part of the shell I which projects beyond the outer surface of the side face 2 and the adjacent portion of the rib 3.
  • Figure 2 is a cross-sectional view along the line II-II through the recess 6 of the shell 1 shown in Figure 1A when forming part of a radiator and having a thermostat 7 installed in the recess 6.
  • the shell 1 is attached by the tube plate 4 which is clenched around ribs 3 to the radiator matrix 13.
  • a raised portion 12 on the side face 2 as shown in Figure 1A would, of course, prevent proper clenching of the tube plate 4 around the rib 3.
  • the raised portion 12 adjacent the inlet 5 shown in Figure 1A thus weakens the connection between the tube plate 4 and the shell 1 in that area but since it extends only for the width of the inlet 5 it does not seriously threaten the water-tightness of the connection.
  • the retaining member 15 is substantially cylindrical in shape to allow access to electrical terminals 16 of the thermostat 7 but has a stepped portion or flange 15A which extends over the casing of the thermostat 7 to limit the extent to which the thermostat can move out of the recess 6 if the pressure within the shell I rises to a level which overcomes the frictional engagement between the thermostat 7 and the grommet 14.
  • Figure 3 is a cross-sectional view corresponding to that shown in Figure 2 of a second embodiment of the invention.
  • This embodiment is similar to that shown in Figure 2 except that the retaining member 15 engages with the recess 6 by means of a snap-fit arrangement rather than by a screw thread.
  • the recess 6 may be circular or rectangular but again comprises a shoulder 9 and a circular aperture 10.
  • the side walls of the recess 6 are, however, provided with saw tooth shaped ribs 17 rather than a screw thread.
  • the retaining member 15, a perspective view of which is shown in Figure 4, has two resilient arms 18 each carrying a saw-tooth projection 19. To attach retaining member 15 to the header tank shell 1 after the thermostat 7 has been installed therein, the two arms 18 are inserted into the recess 6.
  • the retaining member 15 as shown in Figure 6 has part of the cylindrical wall cut away so that the retaining member can be slid with its open side leading into the recess 6 through the open side thereof until it engages the cut-out 20 in the wall of the recess 6 nearest to the rib 3.
  • the retaining member needs to be cut away as shown to allow it to pass over the electrical terminals 16 of the thermostat as it is slid into the recess 6.
  • the retaining member 15 shown in Figure 6 also has two arms 18 and these are preferably also resilient to assist in holding the retaining member in the recess 6 by frictional engagement with the side walls thereof.
  • the arms 18 are, of course, each provided with a projection 19A which fit into the channels in the side wall of the recess between the shoulder 9 and the ribs 17. There is no need, however, for these projections 19A to have a saw-tooth shape as they merely have to slide into the recess 6 defined between the shoulder 9 and the ribs 17.
  • FIGs 8a and 8b are perspective views of a retaining member 15 for use with the shell 1 shown in Figure 7.
  • the retaining member is somewhat similar to that shown in Figure 4 but has a fixed projection 23 on one side and a resilient tag 24 on the opposite side.
  • This retaining member is designed to snap-fit with the recess 6 but in this case the retaining member is inserted into the recess and then rotated to complete the snap-fit.
  • Figures 9A and 9B illustrate how the retaining member is fitted into the recess 6. It is first positioned over a thermostat installed in a rubber bush within the aperture 10 (omitted from Figures 9A and 9B for clarity) so that it rests upon the shoulder 9.
  • the retaining member If the retaining member is then rotated clockwise from this position, the fixed projection 23 enters the channel 21B and the resilient tag 24 will be elastically deformed as it rides over the wall of the recess between shoulder 22A and the side nearest to the rib 3 as shown by the dashed lines in Figure 9A until it reaches the shoulder 22A whereupon it will spring out into the channel 21A. As the resilient tag 24 then engages the shoulder 22A, the retaining member cannot be rotated back anti-clockwise and engagement of
  • Figure 10 shows a header tank shell 1 of a fourth embodiment of the invention. This is similar to the shell 1 shown in Figure 7 in that it has two channels 21A and 21B in opposite sides of the recess. However, the channel 21A continues as a narrower channel 21C beyond the shoulder 22A to the side of the recess nearest to the rib 3.
  • Figure 11 is a view of the recess 6 looking into its open side and more clearly shows the shoulder 22A at the transition between the wide channel 21A and the narrow channel 21C.
  • the retaining member 15 is pressed further into the recess 6 against the thermostat thereby compressing the rubber grommet until the fixed projections 23 reach the shoulder 9 and is then rotated clockwise, the projections 23 will enter the channels 21C and 21B as shown by the dashed lines in Figure 13A.
  • one of the projections 23 will pass the shoulder 22A and enter the wide channel 21A whereupon the rubber grommet is able to expand so that the projection 23 engages the shoulder 22A to prevent the retaining member being turned back anti-clockwise.
  • the projection 23 on the opposite side of the retaining member 15 also then engages shoulder 22B to prevent further clockwise rotation.
  • the retaining member is they securely held within the recess 6 by engagement of the projections 23 with the channels 21A and 21B and the shoulders 22A and 22B.
  • One or both of the projections 23 may also be provided with a cut-out 27 which engages with the corner of the shoulder 22A when the retaining member is in place to help prevent it from rotating back anti-clockwise.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
EP87303035A 1986-04-16 1987-04-08 Wärmetauscher Withdrawn EP0242116A3 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB868609316A GB8609316D0 (en) 1986-04-16 1986-04-16 Header tank
GB8609316 1986-04-16

Publications (2)

Publication Number Publication Date
EP0242116A2 true EP0242116A2 (de) 1987-10-21
EP0242116A3 EP0242116A3 (de) 1987-11-19

Family

ID=10596315

Family Applications (1)

Application Number Title Priority Date Filing Date
EP87303035A Withdrawn EP0242116A3 (de) 1986-04-16 1987-04-08 Wärmetauscher

Country Status (2)

Country Link
EP (1) EP0242116A3 (de)
GB (1) GB8609316D0 (de)

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629576A1 (fr) * 1988-03-30 1989-10-06 Valeo Dispositif de fixation d'un interrupteur thermique sur la paroi d'une boite collectrice de fluide d'un echangeur de chaleur
FR2808586A1 (fr) * 2000-05-02 2001-11-09 Sanden Corp Structure de connexion de tuyau amelioree pour un echangeur de chaleur
FR3089000A1 (fr) * 2018-11-22 2020-05-29 Renault S.A.S. Agencement d’un échangeur de chaleur
WO2022129239A1 (de) * 2020-12-18 2022-06-23 Webasto SE Fahrzeug-wärmeübertrager aufweisend eine flanschverbindungsvorrichtung zur verbindung mindestens eines stutzens

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE416836C (de) * 1923-04-11 1925-07-29 Mitteldeutsche Kuehlerfabrik T Automobilkuehler mit auswechselbaren Elementen
FR2249299A1 (en) * 1973-10-25 1975-05-23 Sueddeutsche Kuehler Behr Plastics water box for heat exchanger - has self-supporting hose connection latchable to edge of box opening
EP0079863A2 (de) * 1981-11-12 1983-05-25 INDUSTRIA PIEMONTESE RADIATORI AUTOMOBILI SOcietà Per Azioni IPRA Kühlungsradiator für Kraftfahrzeuge
US4449692A (en) * 1982-11-15 1984-05-22 Ford Motor Company Drain construction for a radiator
FR2551852A3 (fr) * 1983-09-14 1985-03-15 Sueddeutsche Kuehler Behr Dispositif d'assemblage pour un tube de raccordement d'echangeur de chaleur
GB2170899A (en) * 1985-02-07 1986-08-13 Daimler Benz Ag Heat exchanger

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE416836C (de) * 1923-04-11 1925-07-29 Mitteldeutsche Kuehlerfabrik T Automobilkuehler mit auswechselbaren Elementen
FR2249299A1 (en) * 1973-10-25 1975-05-23 Sueddeutsche Kuehler Behr Plastics water box for heat exchanger - has self-supporting hose connection latchable to edge of box opening
EP0079863A2 (de) * 1981-11-12 1983-05-25 INDUSTRIA PIEMONTESE RADIATORI AUTOMOBILI SOcietà Per Azioni IPRA Kühlungsradiator für Kraftfahrzeuge
US4449692A (en) * 1982-11-15 1984-05-22 Ford Motor Company Drain construction for a radiator
FR2551852A3 (fr) * 1983-09-14 1985-03-15 Sueddeutsche Kuehler Behr Dispositif d'assemblage pour un tube de raccordement d'echangeur de chaleur
GB2170899A (en) * 1985-02-07 1986-08-13 Daimler Benz Ag Heat exchanger

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2629576A1 (fr) * 1988-03-30 1989-10-06 Valeo Dispositif de fixation d'un interrupteur thermique sur la paroi d'une boite collectrice de fluide d'un echangeur de chaleur
FR2808586A1 (fr) * 2000-05-02 2001-11-09 Sanden Corp Structure de connexion de tuyau amelioree pour un echangeur de chaleur
FR3089000A1 (fr) * 2018-11-22 2020-05-29 Renault S.A.S. Agencement d’un échangeur de chaleur
WO2022129239A1 (de) * 2020-12-18 2022-06-23 Webasto SE Fahrzeug-wärmeübertrager aufweisend eine flanschverbindungsvorrichtung zur verbindung mindestens eines stutzens

Also Published As

Publication number Publication date
GB8609316D0 (en) 1986-05-21
EP0242116A3 (de) 1987-11-19

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Inventor name: SEAGRAVE, MICHAEL DOUGLAS

Inventor name: LARDNER, GRAHAM GERALD

Inventor name: PRICE, HENRY CLIFFORD REES

Inventor name: JENKINS DEREK