EP0690281B1 - Method for construction of a heat exchanger and a heat exchanger - Google Patents
Method for construction of a heat exchanger and a heat exchanger Download PDFInfo
- Publication number
- EP0690281B1 EP0690281B1 EP95201661A EP95201661A EP0690281B1 EP 0690281 B1 EP0690281 B1 EP 0690281B1 EP 95201661 A EP95201661 A EP 95201661A EP 95201661 A EP95201661 A EP 95201661A EP 0690281 B1 EP0690281 B1 EP 0690281B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- heat exchanger
- casting
- liquid pipe
- mould
- heat
- 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.)
- Expired - Lifetime
Links
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0072—Casting in, on, or around objects which form part of the product for making objects with integrated channels
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B22—CASTING; POWDER METALLURGY
- B22D—CASTING OF METALS; CASTING OF OTHER SUBSTANCES BY THE SAME PROCESSES OR DEVICES
- B22D19/00—Casting in, on, or around objects which form part of the product
- B22D19/0063—Casting in, on, or around objects which form part of the product finned exchangers
-
- 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/38—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water contained in separate elements, e.g. radiator-type element
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F7/00—Elements not covered by group F28F1/00, F28F3/00 or F28F5/00
- F28F7/02—Blocks traversed by passages for heat-exchange media
Definitions
- a heat exchanger according to the preamble of claim 1 is known, comprising at least one straight liquid pipe incorporated in a casting, which casting is provided in at least one side with a profiled heat exchanging surface. By placing at least a part of the liquid pipe in the mould the sand core has become superfluous.
- the heat exchanger thus has at least one profiled side without the direction of the duct, i.e. the position of the liquid pipe, being hereby determined. It is moreover possible to embody the heat exchanger very compactly.
- Yet another preferred embodiment of the heat exchanger is characterized in that the liquid pipes are arranged practically parallel to each other in the casting. This step enables arrangement of relatively long pipes in the casting, which will enhance the efficiency of the heat exchanger.
- Fig. 1 shows a round heat exchanger 1 according to the invention in which is placed a burner 2.
- the burner 2 is connected to a mixing chamber 3 to which air and flammable gas are supplied via an air inlet 4 and a flammable gas inlet 5.
- the inner surface of heat exchanger 1 is provided with ribs 6 which enlarge the heat-exchanging surface.
- the ribs 6 form part of casting 7 in which two liquid pipes 8, 9 are arranged.
- Liquid pipe 8 herein forms the conduit through which water of a central heating system is carried, while liquid pipe 9 forms the conduit through which flows tap water for heating.
- the liquid in liquid pipes 8, 9 flows spirally upward from below as according to arrows S 1 , S 2 .
Abstract
Description
- Existing heat exchangers for use in a heating boiler for heating water of a central heating system and/or tap water, are usually cast round a sand core. Using the sand core a duct can be left free in he casting which can form for instance the duct for water of a central heating system or tap water. A drawback of this method is that it is relatively labour-intensive to first manufacture and then remove a sand core from the casting. Another drawback to this method is that the duct wall is formed by the casting. The material properties of the wall of the duct are thus determined by the choice of material from the casting material. This causes problems in practice. An aluminum duct wall is thus undesirable in the case of a liquid for transporting which has a pH greater than 8.5; this can occur with water in a closed central heating circuit, while aluminum is very suitable as casting material.
- From the international patent application, published under number WO 85/01101, a heat exchanger according to the preamble of
claim 1 is known, comprising at least one straight liquid pipe incorporated in a casting, which casting is provided in at least one side with a profiled heat exchanging surface. By placing at least a part of the liquid pipe in the mould the sand core has become superfluous. - EP-A-0 495 762 discloses a heat exchanger element, comprising three parallel tubes, which are cast into a body. The portion of the tubes enclosed by the body are externally provided with helical rills, before the casting operation.
- It is an object of the present invention to provide a heat exchanger suitable for domestic purposes, such as a central heating system and/or tap water.
- The present invention provides a heat exchanger with at least one liquid pipe incorporated in a casting, said casting being provided on at least one side with a profiled heat exchanging surface, characterized in that said liquid pipe is spirally wound or arranged in a zig zag form prior to pouring of the casting material, said profiled heat exchanging surface and said bent pipe being incorporated in a single casting body.
- Different materials can be chosen for the duct wall and the casting material. It thus becomes possible to optimize these materials, and further allows great freedom in respect of the form and the position of the duct in the casting. The heat exchanger thus has at least one profiled side without the direction of the duct, i.e. the position of the liquid pipe, being hereby determined. It is moreover possible to embody the heat exchanger very compactly.
- A preferred embodiment of the heat exchanger is characterized in that the profiled surface comprises a substantially lengthwise oriented profile and the liquid pipe is arranged in the casting substantially perpendicularly of the lengthwise oriented profile. With this construction it is possible to realize greater efficiency using the counterflow principle. By supplying a heating gas in lengthwise direction along the lengthwise oriented profile and supplying a counterflow liquid through the liquid pipe a high efficiency can be realized due in part to the comparatively large heat-exchanging surfaces.
- Another preferred embodiment of the heat exchanger is characterized in that at least two liquid pipes are arranged in the casting. This heat exchanger can be applied for combined heating of a plurality of liquids, wherein can be envisaged use in a so-called combi-boiler for heating tap water and water of a central heating system. Both pipes are encased with casting material and mutually separated by casting material, whereby the danger of leakages is very small.
- Yet another preferred embodiment of the heat exchanger is characterized in that the liquid pipes are arranged practically parallel to each other in the casting. This step enables arrangement of relatively long pipes in the casting, which will enhance the efficiency of the heat exchanger.
- The casting is preferably manufactured from aluminum. The liquid pipe preferably manufactured from copper or stainless steel. Aluminum has the advantage that is has good heat-exchanging properties with a relatively small specific mass. Copper and stainless steel have the advantage that they are not rapidly affected by aggressive liquids.
- Further the present invention provides a method for manufacturing a heat exchanger, comprising the following successive steps:
- shaping at least one liquid pipe;
- placing at least a part of the liquid pipe into a mould;
- pouring casting material into the mould;
- causing the casting material to pass into a solid state;
- removing from the mould the casting with liquid pipe incorporated therein, characterized in that said liquid pipe is spirally wound or arranged in a zig zag form before placing into said mould and in that said mould is provided with at least one profiled wall so that the casting is provided on at least one side with a profiled surface.
- The present invention will be further elucidated with reference to the non-limitative embodiments shown in the following figures. Herein:
- fig. 1 shows a partly cut away perspective view of a burner with a round heat exchanger according to the invention;
- fig. 2 shows a partly cut away perspective view of a flat heat exchanger according to the invention; and
- fig. 3 shows a perspective view of a mould for manufacturing the heat exchanger of fig. 2.
-
- Fig. 1 shows a
round heat exchanger 1 according to the invention in which is placed a burner 2. The burner 2 is connected to amixing chamber 3 to which air and flammable gas are supplied via an air inlet 4 and aflammable gas inlet 5. The inner surface ofheat exchanger 1 is provided with ribs 6 which enlarge the heat-exchanging surface. The ribs 6 form part of casting 7 in which twoliquid pipes Liquid pipe 8 herein forms the conduit through which water of a central heating system is carried, whileliquid pipe 9 forms the conduit through which flows tap water for heating. The liquid inliquid pipes outlet 10. Due to the high efficiency it is probable that condensation occurs on the underside ofheat exchanger 1 and inoutlet 10. Condensed liquid is drained via acondensation drain 11. - Fig. 2 shows a
flat heat exchanger 12 comprising acasting 13 of which ribs 14 form part and twoliquid pipes casting 13.Liquid pipes casting 13 such that the heat-exchanging surface is large. To this endliquid pipes casting 13 in zigzag form. The flow direction of the liquid in the liquid pipes is indicated with arrows S4, S5, while arrow S6 indicates the flow direction of the combustion gas. Use is also made in this situation of the counterflow principle to optimize the efficiency ofheat exchanger 12. Theheat exchanger 12 shown in this figure can for instance be incorporated into a so-called combi-boiler for household use. - Fig. 3 shows a
mould 17 with which theheat exchanger 12 shown in fig. 2 can be manufactured. Theliquid pipes mould 17. Casting material will subsequently be poured intomould 17 via an opening 18. A profiledmould wall 19 comprises amain profile 20 whereby the ribs 14 are formed. After the casting material introduced into themould 17 has hardened atop plate 21 is removed, whereafter thecasting 13 with thepipes side walls mould 17. Finally, theside walls
Claims (7)
- Heat exchanger with at least one liquid pipe incorporated in a casting, said casting being provided on at least one side with a profiled heat exchanging surface, characterized in that said liquid pipe is spirally wound or arranged in a zig zag form prior to pouring of the casting material, said profiled heat exchanging surface and said bent pipe being incorporated in a single casting body.
- Heat exchanger according to claim 1 with at least two liquid pipes incorporated in a casting material, characterized in that the liquid pipes in the heat exchanger form at least two separate conduits for heat exchange to/from different fluids.
- Heat exchanger according to claim 1 or 2, characterized in that the heat exchanger has a central opening, and the inner surface of the heat exchanger is provided with the profiled heat exchanging surface.
- Heat exchanger according to claim 3, characterized in that a burner is mounted in the central opening of the heat exchanger.
- Heat exchanger according to one of claims 2-4, characterized in that the distance from one to the conduits to the heat exchanging surface of the heat exchanger is larger than the distance of another circuit to the heat exchanging surface of the heat exchanger.
- Heat exchanger according to any of claims 1-5, wherein said liquid pipe is of copper and said casting material comprises aluminum.
- A method for manufacturing a heat exchanger, comprising the following successive steps:shaping at least one liquid pipe;placing at least a part of the liquid pipe into a mould;pouring casting material into the mould;causing the casting material to pass into a solid state;removing from the mould the casting with liquid pipe incorporated therein, characterized in that said liquid pipe is spirally wound or arranged in a zig zag form before placing into said mould and in that said mould is provided with at least one profiled wall so that the casting is provided on at least one side with a profiled surface.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NL9401061 | 1994-06-27 | ||
NL9401061A NL9401061A (en) | 1994-06-27 | 1994-06-27 | Method for manufacturing a heat exchanger and a heat exchanger. |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0690281A1 EP0690281A1 (en) | 1996-01-03 |
EP0690281B1 true EP0690281B1 (en) | 1999-12-08 |
Family
ID=19864364
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP95201661A Expired - Lifetime EP0690281B1 (en) | 1994-06-27 | 1995-06-19 | Method for construction of a heat exchanger and a heat exchanger |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP0690281B1 (en) |
AT (1) | ATE187548T1 (en) |
DE (1) | DE69513734T2 (en) |
NL (1) | NL9401061A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019112147A1 (en) * | 2019-05-09 | 2020-11-12 | Julius Schüle Druckguss GmbH | Method for casting a pipeline into a component to be produced by means of a die-casting process |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2072931A3 (en) | 2007-12-21 | 2012-04-04 | A.M. S.R.L. | Heat exchanger particularly suitable for the construction of high-efficiency so-called condensing type heating boilers |
Family Cites Families (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP0153363B1 (en) * | 1983-08-26 | 1988-01-07 | Karl ÖSTBO | A heat exchanger |
US4865112A (en) * | 1988-07-07 | 1989-09-12 | Schwarb Foundry Company | Method of casting metals with integral heat exchange piping |
FR2665384B1 (en) * | 1990-08-02 | 1992-10-16 | Montupet Sa | PROCESS FOR PRODUCING A MOLDED PART IN AL OR ITS ALLOYS PROVIDED WITH INTEGRATED CHANNELS. |
SE467803B (en) * | 1991-01-15 | 1992-09-14 | Nordinvent Sa | HEAT EXCHANGE ELEMENT CONSISTING OF CLOSELY LOCATED PIPES INSTALLED IN A METAL BODY WITH GOOD CONDUCTIVITY, WHERE THE BODY IS PROVIDED WITH SURFACE-BASED ELEMENTS IN THE FORM OF STRUCTURED PYRAMIDS |
-
1994
- 1994-06-27 NL NL9401061A patent/NL9401061A/en not_active Application Discontinuation
-
1995
- 1995-06-19 DE DE69513734T patent/DE69513734T2/en not_active Expired - Lifetime
- 1995-06-19 EP EP95201661A patent/EP0690281B1/en not_active Expired - Lifetime
- 1995-06-19 AT AT95201661T patent/ATE187548T1/en active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102019112147A1 (en) * | 2019-05-09 | 2020-11-12 | Julius Schüle Druckguss GmbH | Method for casting a pipeline into a component to be produced by means of a die-casting process |
Also Published As
Publication number | Publication date |
---|---|
DE69513734D1 (en) | 2000-01-13 |
ATE187548T1 (en) | 1999-12-15 |
NL9401061A (en) | 1996-02-01 |
EP0690281A1 (en) | 1996-01-03 |
DE69513734T2 (en) | 2000-04-06 |
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