EP1608919A1 - Instantaneous water heater - Google Patents
Instantaneous water heaterInfo
- Publication number
- EP1608919A1 EP1608919A1 EP04719441A EP04719441A EP1608919A1 EP 1608919 A1 EP1608919 A1 EP 1608919A1 EP 04719441 A EP04719441 A EP 04719441A EP 04719441 A EP04719441 A EP 04719441A EP 1608919 A1 EP1608919 A1 EP 1608919A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- power component
- heating module
- heater according
- circuit board
- cooling
- 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
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 69
- 238000001816 cooling Methods 0.000 claims abstract description 87
- 238000010438 heat treatment Methods 0.000 claims abstract description 42
- 239000000919 ceramic Substances 0.000 claims abstract description 26
- 239000002184 metal Substances 0.000 claims description 5
- 229910052751 metal Inorganic materials 0.000 claims description 5
- 239000011324 bead Substances 0.000 claims description 3
- 239000000463 material Substances 0.000 claims description 3
- 230000015572 biosynthetic process Effects 0.000 claims 1
- 238000003825 pressing Methods 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 3
- 229910052802 copper Inorganic materials 0.000 description 3
- 239000010949 copper Substances 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000004026 adhesive bonding Methods 0.000 description 2
- 229910010293 ceramic material Inorganic materials 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000002349 favourable effect Effects 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 230000033228 biological regulation Effects 0.000 description 1
- 239000002131 composite material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000005538 encapsulation Methods 0.000 description 1
- 238000007765 extrusion coating Methods 0.000 description 1
- 239000003292 glue Substances 0.000 description 1
- 230000017525 heat dissipation Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 238000001746 injection moulding Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002991 molded plastic Substances 0.000 description 1
- 238000005192 partition Methods 0.000 description 1
- 238000007493 shaping process Methods 0.000 description 1
- 239000000243 solution Substances 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
-
- 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
- F24H9/00—Details
- F24H9/20—Arrangement or mounting of control or safety devices
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2014—Arrangement or mounting of control or safety devices for water heaters using electrical energy supply
- F24H9/2028—Continuous-flow heaters
-
- 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
- F24H15/00—Control of fluid heaters
- F24H15/40—Control of fluid heaters characterised by the type of controllers
- F24H15/407—Control of fluid heaters characterised by the type of controllers using electrical switching, e.g. TRIAC
-
- 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
- F24H1/10—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium
- F24H1/101—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply
- F24H1/102—Continuous-flow heaters, i.e. heaters in which heat is generated only while the water is flowing, e.g. with direct contact of the water with the heating medium using electric energy supply with resistance
Definitions
- the invention relates to a water heater according to the preamble of claim 1 or the independent claim 2.
- power components such as triacs
- the cooling interface is located on a copper pipe loop intended only for cooling purposes in the cold water inlet area, the power component being pressed against a flat pinched contact surface of the copper pipe with a spring clip. Since the copper pipe is electrically conductive, the power section requires a direct earth connection. This construction principle requires many individual parts, complicated wiring and the grounding of each power component. This results in high manufacturing and assembly costs.
- At least one printed circuit board is conventionally provided, on which further components of the control are optionally arranged, and which is fixed with its own fastening elements, for example screws, at fastening points of the heating pulse prepared for this purpose.
- Power components that emit heat during operation are conventionally placed at the cooling interface, grounded and connected to the controller. Therefore, the independent determination and positioning of the circuit board also increases the manufacturing and assembly costs.
- the invention has for its object to provide a water heater of the type mentioned, which can be manufactured with reduced effort.
- the tasks also include avoiding the grounding of the cooled power component or separate fastening devices for the printed circuit board, or these two aspects.
- the stated object is achieved with regard to the first aspect by the features of claim 1, on the other hand with regard to the second aspect by the features of claim 2, and with regard to both aspects by the features of claims 1 and 2.
- the ceramic cooling element insulates the power component, eg a triac, ⁇ electrically from the water, so that the cooling interface or the power component does not require grounding, and yet the device safety complies with the regulations.
- the ceramic cooling element effectively transfers heat or cold in order to cool the power component. It is therefore expedient to use ceramic material with a high thermal conductivity, which also has good mechanical properties, which ensure the necessary flatness in the contact area of the component, and also withstand the fastening forces and thermal influences during operation.
- the cooling element can be relatively small, so that the cooling interface can even be largely arranged within a given cold water inlet area without additional effort.
- the ceramic cooling element is expediently used for cooling a power component, which is pressed resiliently against the cooling element with a holding element, the holding element also being able to fix a printed circuit board of the electronic control on the heating module which possibly carries the power component.
- the ceramic cooling element can also be used profitably if the circuit board is fixed to the heating module in a conventional manner.
- the holding element which positions the power component at the cooling interface, also fixes the printed circuit board on the heating module, the manufacturing and assembly effort is significantly reduced, since separate fastening elements are dispensed with.
- the circuit board can also be fixed to the heating module with the holding element for the power component if the power component is cooled differently than with a ceramic cooling element.
- a particularly advantageous embodiment is characterized in that the ceramic cooling element for cooling the power component is advantageously integrated into the heating module in such a way that piping can only be omitted for cooling purposes.
- the power component which is expediently mounted directly on the printed circuit board, is placed on the cooling element with a holding element and pressed against the cooling element by the holding element via the printed circuit board. Finally, the circuit board is fixed to the heating module by the holding element, which presses the power component onto the cooling element. If at all, auxiliary supports are sufficient for the final positioning of the circuit board, which can be equipped with further electronic components, in order to properly fix the circuit board in operation and during transport.
- the ceramic cooling element is inserted in a watertight manner between the outside of the heating module and the cold water inlet area in the heating module.
- the cooling interface In order to integrate the cooling interface into the heating module, only minor modifications in the inlet area are required.
- One possibility would be direct encapsulation during the injection molding process.
- the cooling element could also be used retrospectively by pressing, welding, gluing or locking.
- the power component is expediently held in cooling contact with the cooling element by a resilient holding element.
- the holding element could also be used to make the cooling element, which is only loosely attached, watertight.
- a solution in which the cooling element is fixed in a watertight manner and presents its exposed contact surface for the power component to rest on is to be preferred.
- a plate-shaped, disc-shaped or cap-shaped ceramic cooling element is inexpensive and can be manufactured with high dimensional accuracy and dimensional accuracy. These geometric shapes also offer sufficient structural strength so that the cooling element can easily withstand the mechanical, thermal and hydraulic loads.
- the cap shape presents the contact area for the power component to be easily accessible. There is sufficient contact surface in the cap edge area for fixing and / or sealing.
- the cooling element is arranged essentially perpendicular to the direction of flow of the cold water to the cooling interface. This enables effective heat transfer from the cooling element into the water.
- the inflow surface of the cooling element could be designed to be streamlined, for example concave, in order to reduce the risk of undesirable turbulence. It would also be possible to structure the inflow surface so that it is in contact with the water flow. tactical surface is increased, for example by ribs, which can also contribute to the flow.
- a water dome which has an opening and contains an inlet channel and an outlet channel is arranged on the heating module.
- the channels can unite on the cooling element.
- the ceramic cooling element is arranged watertight in the opening.
- the water dome means only a minor modification, the cold water inlet area of the heating module.
- the water dome can be easily formed from the material of the heating module and / or the cold water inlet area, and makes it possible to expose the cooling element used where the power component can be easily installed.
- the water dome is expediently in the component group of the electronic control, or vice versa.
- An overflow threshold is expediently provided in the water dome, to which flow guiding surfaces lead, which bring the incoming cold water essentially perpendicular to the inflow surface of the cooling element and drain the outflowing water as quickly as possible in order to force intensive flow dynamics that are favorable for the cooling effect along the inflow surface ,
- the holding element is expediently a U-shaped spring clip which can be produced inexpensively, for example as a sheet metal stamped and bent part.
- the holding element could also be a spring clip with more than two holding legs and a spring structure for pressing the power component.
- Abutments for example plug-in shafts, are expediently formed on the outside of the water dome for the holding legs of the holding element. There is a favorable holding depth for the spring clip.
- the abutments for the holding element near the cooling interface are also expedient if the holding element is not only used for pressing the power component onto the cooling element, but also for at least partially fixing the printed circuit board of the electronic control on the heating module.
- positioning elements for the printed circuit board can be formed on the heating module, which improve the positioning and the fit of the printed circuit board under the holding force of the holding element.
- element can press the power component, which is expediently mounted directly on the circuit board, indirectly onto the cooling element via the circuit board.
- the same holding element can be used, e.g. a U-shaped spring clip.
- the printed circuit board can be larger and heavier than the power component, it would be possible to use a larger and / or stronger holding element with a different shape to fix the printed circuit board.
- a good resilient pressing action for the power component and / or the printed circuit board can be achieved if the holding element designed as a U-spring clip is alternately bent in and out in the crosspiece.
- Longitudinal stiffening beads can be formed in the holding legs, which, preferably, e.g. Prevent unwanted kinking or twisting of the retaining legs when installing the spring clip.
- the power component to be cooled is typically a triac switching element which generates heat when the instantaneous water heater is in operation and is cooled by the incoming cold water by means of the ceramic cooling element.
- Fig. 1 is a schematic section of a portion of a water heater
- FIG. 2 shows a perspective section of FIG. 1.
- a heating module M which consists of two interconnected module molded parts 1, 2 (for example injection molded molded parts).
- the heating module M is indicated by a dashed line in the operating position of the instantaneous water heater D indicated hood F covered.
- the heating module M is connected to water inlets and outlets, not shown, and is electrically connected to the power supply.
- the electronic control S for at least one heating element (not shown) in the heating module has a printed circuit board P with components mounted thereon and at least one electronic power component B which is mounted on the printed circuit board P in FIG. 1.
- the power component B is, for example, a triac switching element which generates heat during operation of the instantaneous water heater D and requires cooling. For this reason, the power component B is placed at a cooling interface K with the cold water inlet of the heating module M.
- the power component B is held in contact with a ceramic cooling element E by means of at least one holding element H, which electrically insulates the power component B from the water at the cooling interface K and forms a heat transfer body to the water.
- the holding element H acts on the printed circuit board P in order to hold the power component B in contact with the cooling element E indirectly via the printed circuit board P.
- the holding element H serves at the same time for fixing the circuit board P on the heating module M.
- the holding element H could act directly on the power component B arranged separately from the printed circuit board P and hold it in contact with the cooling element E.
- the circuit board P would then be attached differently.
- the heating module molded parts 1, 2 delimit an internal cold water inlet channel 3, in which the cold water flows in the direction of the arrow R before heating.
- the cold water comes from a water dome 4, preferably molded in one piece in the molded part 1, which has an opening 5 into which the ceramic cooling element E is inserted in a watertight manner, for example by means of an O-ring 13.
- the edge of the opening 5 is, for example, plastically deformed or flanged to tightly fix the cooling element E.
- the cooling element E could also be held in a tight fit only by the holding pressure of the holding element H.
- the water dome 4 is formed, for example, an inlet channel 6 connected to the cold water inlet, not shown, which is separated from an outlet channel 9 by a partition 7, which ends at an overflow threshold 8 at a distance from the ceramic cooling element E.
- At least the dividing wall 7 forms flow guide surfaces oriented essentially perpendicular to the cooling element E, so that the cold water flow indicated by the curved arrow Z acts on the cooling element E as intensively and with little swirling (see FIG. 2).
- further positioning elements 11, e.g. Support feet may be provided on the molded part 1, on which the printed circuit board P is seated under the holding force of the holding element H, and which preferably also comprise at least two corners of the printed circuit board P laterally.
- the positioning elements 11 can have depth stops 12 for securing the printed circuit board P.
- the power component B is electrically insulated from the water, and the incoming cold water in the heating module M does not require any metallic piping at the interface K, so that the power component B does not need to be separately grounded.
- the circuit board P is usually grounded anyway.
- Fig. 2 illustrates on an enlarged scale how the ceramic cooling element E designed as a cap 14 rests with its lower, widened cap edge on the O-ring 13 which is inserted into a socket 5 opening.
- the cooling element E can, for example, be fixed in its shown sealing position by flanging the edge of the opening or by extrusion coating, gluing, and similar types of connection.
- the cooling element could also be a plate or a disk made of ceramic material with good thermal conductivity.
- the exposed top of the cooling element E forms a flat contact surface 15 in FIG the power component B, while the inside or underside of the cap 14 forms here, for example, a cup-shaped inflow surface 16 for the cold water from the inlet channel 6.
- the overflow threshold 8 lies opposite the inflow surface 16 at a distance which is selected such that there are optimal flow conditions along the inflow surface 16 for efficient heat dissipation.
- the holding element H is a U-shaped spring clip with a cross bar 17 and e.g. two holding legs 19.
- the transverse web 17 has several alternating bends 18 with a view to a desirable spring action.
- sawtooth-like locking projections 20 are formed on the holding legs 19, which are automatically anchored in the abutments 10; if necessary, the abutments 10 are also toothed on the inside.
- Longitudinal stiffening beads 21 increase the structural strength of the holding legs 19.
- the holding element H of FIGS. 1 and 2 is expediently a sheet metal stamped and bent part made of a suitable metal. Alternatively, the holding element could also be a molded plastic part or a composite part.
Abstract
Description
Claims
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP10162910.3A EP2226590B1 (en) | 2003-03-21 | 2004-03-11 | Throughflow heater |
Applications Claiming Priority (3)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10312728A DE10312728A1 (en) | 2003-03-21 | 2003-03-21 | Heater |
DE10312728 | 2003-03-21 | ||
PCT/EP2004/002545 WO2004083739A1 (en) | 2003-03-21 | 2004-03-11 | Instantaneous water heater |
Related Child Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10162910.3A Division EP2226590B1 (en) | 2003-03-21 | 2004-03-11 | Throughflow heater |
EP10162910.3 Division-Into | 2010-05-17 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP1608919A1 true EP1608919A1 (en) | 2005-12-28 |
EP1608919B1 EP1608919B1 (en) | 2010-08-25 |
Family
ID=32921077
Family Applications (2)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP04719441A Expired - Fee Related EP1608919B1 (en) | 2003-03-21 | 2004-03-11 | Instantaneous water heater |
EP10162910.3A Expired - Fee Related EP2226590B1 (en) | 2003-03-21 | 2004-03-11 | Throughflow heater |
Family Applications After (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP10162910.3A Expired - Fee Related EP2226590B1 (en) | 2003-03-21 | 2004-03-11 | Throughflow heater |
Country Status (5)
Country | Link |
---|---|
EP (2) | EP1608919B1 (en) |
CN (1) | CN1761845B (en) |
DE (1) | DE10312728A1 (en) |
PL (2) | PL219136B1 (en) |
WO (1) | WO2004083739A1 (en) |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102008054835A1 (en) * | 2008-12-17 | 2010-07-01 | BSH Bosch und Siemens Hausgeräte GmbH | Laundry dryer has temperature heat sink system with two fluid streams, where temperature heat sink system guides part of waste heat of control unit |
EP2489956B2 (en) | 2011-02-21 | 2020-09-09 | Gerdes Holding GmbH & Co. KG | Cooling system of an electric construction element that heats up |
DE102011013972A1 (en) * | 2011-03-14 | 2012-09-20 | Stiebel Eltron Gmbh & Co. Kg | Domestic electrical heater i.e. geyser, has cooling body including two sides attached with each other, where water partially flows against body at one of sides, and seal is arranged in region of body and inserted into hole of discharge body |
CN202126082U (en) * | 2011-05-25 | 2012-01-25 | 上海科勒电子科技有限公司 | Instantaneous heater applied to kitchen and bathroom products |
WO2015018950A1 (en) * | 2013-08-09 | 2015-02-12 | Talleres Del Agua, S.L. Sociedad Unipersonal | Heat exchanger for heating water |
DE102017003416A1 (en) * | 2017-04-07 | 2018-10-11 | Stiebel Eltron Gmbh & Co. Kg | Electric water heating system |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4762980A (en) * | 1986-08-07 | 1988-08-09 | Thermar Corporation | Electrical resistance fluid heating apparatus |
DE4106273C1 (en) * | 1991-02-28 | 1992-05-21 | Stiebel Eltron Gmbh & Co Kg, 3450 Holzminden, De | Through-flow electric water heater - controls heating elements power using triacs cooled by pipe connected to cold water supply |
DE4327895A1 (en) * | 1993-08-19 | 1995-02-23 | Abb Management Ag | Power converter module |
DE4420493A1 (en) * | 1994-06-12 | 1995-12-14 | Ego Elektro Blanc & Fischer | Electronic flow heating element for media |
US6055154A (en) * | 1998-07-17 | 2000-04-25 | Lucent Technologies Inc. | In-board chip cooling system |
-
2003
- 2003-03-21 DE DE10312728A patent/DE10312728A1/en not_active Withdrawn
-
2004
- 2004-03-11 EP EP04719441A patent/EP1608919B1/en not_active Expired - Fee Related
- 2004-03-11 PL PL396722A patent/PL219136B1/en unknown
- 2004-03-11 WO PCT/EP2004/002545 patent/WO2004083739A1/en active Application Filing
- 2004-03-11 CN CN200480007708.4A patent/CN1761845B/en not_active Expired - Fee Related
- 2004-03-11 PL PL377405A patent/PL211167B1/en unknown
- 2004-03-11 EP EP10162910.3A patent/EP2226590B1/en not_active Expired - Fee Related
Non-Patent Citations (1)
Title |
---|
See references of WO2004083739A1 * |
Also Published As
Publication number | Publication date |
---|---|
PL396722A1 (en) | 2011-12-19 |
PL377405A1 (en) | 2006-02-06 |
CN1761845A (en) | 2006-04-19 |
EP2226590A1 (en) | 2010-09-08 |
EP2226590B1 (en) | 2016-10-05 |
PL219136B1 (en) | 2015-03-31 |
DE10312728A1 (en) | 2004-09-30 |
PL211167B1 (en) | 2012-04-30 |
CN1761845B (en) | 2010-06-16 |
EP1608919B1 (en) | 2010-08-25 |
WO2004083739A1 (en) | 2004-09-30 |
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