EP0610823A1 - Echangeur de chaleur, en particulier pour sèche-linge - Google Patents

Echangeur de chaleur, en particulier pour sèche-linge Download PDF

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Publication number
EP0610823A1
EP0610823A1 EP94101706A EP94101706A EP0610823A1 EP 0610823 A1 EP0610823 A1 EP 0610823A1 EP 94101706 A EP94101706 A EP 94101706A EP 94101706 A EP94101706 A EP 94101706A EP 0610823 A1 EP0610823 A1 EP 0610823A1
Authority
EP
European Patent Office
Prior art keywords
profile plates
heat exchanger
holding frame
dowels
exchanger according
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
Application number
EP94101706A
Other languages
German (de)
English (en)
Other versions
EP0610823B1 (fr
Inventor
Andreas C/O Whirlpool Italia S.R.L. Bollmann
Gerhardt C/O Whirlpool Italia S.R.L. Fuchs
Dietrich C/O Whirlpool Italia S.R.L. Berner
Horst C/O Whirlpool Italia S.R.L. Sperling
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.)
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
Original Assignee
Bauknecht Hausgeraete GmbH
Whirlpool Europe BV
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 Bauknecht Hausgeraete GmbH, Whirlpool Europe BV filed Critical Bauknecht Hausgeraete GmbH
Publication of EP0610823A1 publication Critical patent/EP0610823A1/fr
Application granted granted Critical
Publication of EP0610823B1 publication Critical patent/EP0610823B1/fr
Anticipated expiration legal-status Critical
Expired - Lifetime 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
    • F28F9/04—Arrangements for sealing elements into header boxes or end plates
    • F28F9/06—Arrangements for sealing elements into header boxes or end plates by dismountable joints
    • F28F9/08—Arrangements for sealing elements into header boxes or end plates by dismountable joints by wedge-type connections, e.g. taper ferrule

Definitions

  • the invention relates to a heat exchanger with hollow profile plates arranged at a distance from one another, the ends of which are inserted into slots of two holding frames and fixed therein, in particular for tumble dryers.
  • a heat exchanger of this type is known from DE 85 30 313 U1 and EP 0 223 995 A2.
  • the moisture-containing process air of the tumble dryer passes through the spaces formed between the profile plates. Cool air is blown through the hollow profile plates.
  • the surfaces of the profile plates form condensation surfaces on which the moisture contained in the process air condenses.
  • the profile plates are glued into the slots of the holding frame or held therein by caulking.
  • the profile plates can also be connected to the holding frame by means of hollow rivets. Screw connections have also been used, as shown in EP 0 067 699 A1.
  • the holding frames are fixed to the profile plates by means of dowels, the dowels being inserted with their spreading elements into the hollow profile plates and being braced against the inner walls of the profile plates by means of expansion pins driven into their dowel bore.
  • the holding frames can be quickly and easily attached to the profile plates with the dowels. Due to the driven expansion pins, the expansion elements are clamped so tightly to the inner walls of the hollow profile sections that a high peel strength is achieved, which is also the case with great heat exposure does not deteriorate.
  • An embodiment is sufficient, which is characterized in that four dowels are provided per holding frame, which are arranged in the end regions of the first and the last slot of the holding frame. The assembly of the heat exchanger can be easily automated with this type of connection.
  • connection between the dowels and the holding frame can be improved in that the dowels are separated from the holding frame and are supported with a collar or the like on the outer sides of the holding frame, or in that the dowels are integrally formed on the holding frame.
  • the slots of the holding frame are provided in the area of the outside with flanges which serve as stops for the profile plates, then the insertion movement of the profile plates into the slots of the holding frame is limited.
  • a further embodiment provides that the inside of the holding frames are provided with an elastic covering which seals the inserted ends of the profile plates on the outside, whereby the sealing can be improved thereby that the holding frame on the inside between the slots carry molded webs, which are also provided with elastic coverings.
  • the webs also increase the stability of the holding frame.
  • the production of the holding frame with the elastic covering is preferably carried out in plastic two-component injection molding, so that the The holding frame and the elastic covering form a compact, unsolvable unit.
  • the profile plates are divided into chambers by webs, so that the dowels with the cross section can be matched to the cross section of a chamber in order to further increase the peel strength.
  • the dowel holes are designed to be conically tapered.
  • FIG. 1 shows a clothes dryer 10 in a perspective front view. Access to the drum is covered by a door 11. A removable heat exchanger 20 is installed below the drum. The control panel 12 with switches, display elements and the like is arranged above the door 11 in the front of the clothes dryer 10.
  • the built-in heat exchanger 20 is shown enlarged in Fig. 2. It consists of several hollow profile plates 21, which can also be divided into several chambers by means of webs. The profile plates 21 are arranged parallel to each other, so that there is a gap between adjacent profile plates 21. The profile plates 21 are held between two holding frames 30. Slots 31 are made in this holding frame 30 which correspond in cross section to the outer cross section of the profile plates 21.
  • the profile plates 21 are inserted into the slots 31 and preferably abut a flange 35 (FIG. 3) which closes the slot 31 all around in the region of the outside of the holding frame 30. In this way, only the cavities of the profile plates 21 are accessible via the holding frame 30. As the arrows 33 indicate, cooling air can be passed through the hollow profile plates 21, while the moisture-laden process air passes the gaps between the profile plates 21, as the arrows 34 show.
  • the holding frames 30 are connected with dowels 40 to the profile plates 21, four dowels 40 in the end regions of the first and the last slot 31 of the holding frames 30 being sufficient.
  • the dowels 40 can be integrally formed on the holding frame 30.
  • the expansion elements 42 and 43 of a dowel 40 which are preferably provided with a conical dowel hole 41, are inserted into a chamber of the hollow profile plate 21, which is divided by a web 22. If an expansion pin 45 is driven into the conical dowel bore 41, then the expansion elements 42 and 43 expand and tighten on the inner wall of the chamber.
  • the holding frame 30 is thus fixed connected to the associated profile plate 21.
  • the remaining profile plates 21 are supported in the region of their slots 31 on the flange 35.
  • the heat exchanger 20, together with the profile plates 21 and the two attached holding frames 30, forms a compact unit with high pull-out strength.
  • the profile plates 21 are preferably cut to length from an extruded aluminum profile and the holding frames 30 are produced as plastic injection molded parts.
  • expansion elements 42 and 43 of the dowels 40 are matched in cross section to the cross section of a chamber of the profile plate 21, then a particularly high pull-out strength is achieved.
  • the dowels 40 can also be designed as parts separate from the holding frame 30. Then the dowels 40 are supported with a collar or the like on the outside of the holding frame 30 in order to obtain a sufficiently high pull-out strength.
  • a further development provides that the inner sides, ie the sides facing the profile plates 21, of the holding frame 30 are provided with an elastic covering.
  • This elastic covering seals the ends of the profile plates 21 on the outside, so that the cooling air can only get into the hollow profile plates 21 from the outside of the holding frame 30.
  • the holding frame 30 can carry additional webs, which are also provided with an elastic covering. This can improve the sealing of the ends of the profile plates 21 and at the same time the stability of the holding frame 30 is increased.
  • the holding frame 30 is made with the elastic covering in the plastic two-component injection molding process, so that a compact, non-detachable unit is formed.
  • the holding frames 30 can also be connected to the profile plates 21, which are distributed over the holding frames 30, by means of more than four dowels 40.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
EP94101706A 1993-02-11 1994-02-04 Echangeur de chaleur, en particulier pour sèche-linge Expired - Lifetime EP0610823B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE4304072A DE4304072C2 (de) 1993-02-11 1993-02-11 Wärmetauscher, insbesondere für Wäschetrockner
DE4304072 1993-02-11

Publications (2)

Publication Number Publication Date
EP0610823A1 true EP0610823A1 (fr) 1994-08-17
EP0610823B1 EP0610823B1 (fr) 1996-12-11

Family

ID=6480208

Family Applications (1)

Application Number Title Priority Date Filing Date
EP94101706A Expired - Lifetime EP0610823B1 (fr) 1993-02-11 1994-02-04 Echangeur de chaleur, en particulier pour sèche-linge

Country Status (2)

Country Link
EP (1) EP0610823B1 (fr)
DE (2) DE4304072C2 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210121717A1 (en) * 2019-10-24 2021-04-29 Dräger Safety AG & Co. KGaA Cooling element system for use within a cooling device of a closed-circuit respirator

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2273222A1 (fr) * 1974-05-30 1975-12-26 Chausson Usines Sa
FR2341095A1 (fr) * 1976-02-10 1977-09-09 Hamon Dispositif de fixation etanche d'un tube dans une paroi d'une enceinte sous pression hydrostatique et son application a des batteries de tubes d'echange thermique
GB2020005A (en) * 1978-03-23 1979-11-07 Tilley J C Solar heating system
SU1231377A1 (ru) * 1984-11-20 1986-05-15 Челябинское Ремонтно-Монтажное Специализированное Управление Треста "Союзцветметгазоочистка" Узел соединени плоских труб в теплообменнике
FR2644569A1 (fr) * 1989-03-16 1990-09-21 Valeo Thermique Moteur Sa Echangeur de chaleur, en particulier pour vehicules automobiles, et procede pour son assemblage
EP0481178A1 (fr) * 1990-10-17 1992-04-22 Zanker GmbH Sèche linge avec condenseur

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2966373A (en) * 1959-02-02 1960-12-27 Ici Ltd Tubular inserts
US3989282A (en) * 1975-08-11 1976-11-02 Reed Irrigation Systems Plug-type device for interconnecting conduits
GB2079883B (en) * 1980-07-10 1984-04-18 Secr Defence Method of providing pressure tapping holes

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2273222A1 (fr) * 1974-05-30 1975-12-26 Chausson Usines Sa
FR2341095A1 (fr) * 1976-02-10 1977-09-09 Hamon Dispositif de fixation etanche d'un tube dans une paroi d'une enceinte sous pression hydrostatique et son application a des batteries de tubes d'echange thermique
GB2020005A (en) * 1978-03-23 1979-11-07 Tilley J C Solar heating system
SU1231377A1 (ru) * 1984-11-20 1986-05-15 Челябинское Ремонтно-Монтажное Специализированное Управление Треста "Союзцветметгазоочистка" Узел соединени плоских труб в теплообменнике
FR2644569A1 (fr) * 1989-03-16 1990-09-21 Valeo Thermique Moteur Sa Echangeur de chaleur, en particulier pour vehicules automobiles, et procede pour son assemblage
EP0481178A1 (fr) * 1990-10-17 1992-04-22 Zanker GmbH Sèche linge avec condenseur

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
DATABASE WPI Section Ch Week 8701, Derwent World Patents Index; Class J08, AN 87-005972 *

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20210121717A1 (en) * 2019-10-24 2021-04-29 Dräger Safety AG & Co. KGaA Cooling element system for use within a cooling device of a closed-circuit respirator

Also Published As

Publication number Publication date
DE59401220D1 (de) 1997-01-23
EP0610823B1 (fr) 1996-12-11
DE4304072C2 (de) 1995-05-11
DE4304072A1 (de) 1994-08-18

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