WO2002027246A1 - Element chauffant d'un ecoulement - Google Patents

Element chauffant d'un ecoulement Download PDF

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Publication number
WO2002027246A1
WO2002027246A1 PCT/EP2001/010719 EP0110719W WO0227246A1 WO 2002027246 A1 WO2002027246 A1 WO 2002027246A1 EP 0110719 W EP0110719 W EP 0110719W WO 0227246 A1 WO0227246 A1 WO 0227246A1
Authority
WO
WIPO (PCT)
Prior art keywords
flow heater
heat
distribution plate
channel
heat distribution
Prior art date
Application number
PCT/EP2001/010719
Other languages
English (en)
Inventor
Marinus Bliek
Rene H. Van Der Woude
Original Assignee
Koninklijke Philips Electronics N.V.
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 Koninklijke Philips Electronics N.V. filed Critical Koninklijke Philips Electronics N.V.
Priority to EP01980395A priority Critical patent/EP1337792A1/fr
Publication of WO2002027246A1 publication Critical patent/WO2002027246A1/fr

Links

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
    • 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
    • F24H1/12—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 in which the water is kept separate from the heating medium
    • F24H1/14—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 in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form
    • F24H1/16—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 in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled
    • F24H1/162—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 in which the water is kept separate from the heating medium by tubes, e.g. bent in serpentine form helically or spirally coiled using electrical energy supply

Definitions

  • the invention relates to a flow heater as defined in the preamble of claim 1.
  • Such flow heaters serve to heat a through-flowing fluid by means of heat originating from a heat source applied against the heat-conducting element.
  • Such a flow heater is described in German patent application 39 25 549.
  • the flow heater described in this cited patent application is provided with a heat-conducting element built up from a central profiled portion with mutually parallel channels. These channels extend in a longitudinal direction through the entire heat-conducting element and are open at two mutually opposed ends of the heat-conducting element.
  • a connection for an inlet or outlet is mounted to each of the end faces, also interconnecting the channels such that the channel structure has a meandering shape.
  • a thermal element in the form of one or several thin strips of high electrical resistance is provided against a side of the heat-conducting element between the channel ends. A current is passed through the thin strips and the electrical energy is partly dissipated into heat thereby, so that the water in the channels can be heated through heat transfer to the heat-conducting element.
  • this object is achieved in that a flow heater as defined in claim 1 is provided.
  • the heat distribution plate and the closing element, between which the channels are closed in render it possible to determine the shape of the channel or channels in a simple manner through the choice of the shape of the closing element, while the heat distribution plate, which comprises a comparatively large quantity of material for achieving a sufficient heat transfer capacity, can be of a simple construction.
  • the fact that the closing element is in thermal contact with the first side of the heat transfer plate moreover, promotes an even heat transfer.
  • the heat-generating element may then be simply provided against the second side of the heat distribution plate facing away from the closing element and the channel or channels.
  • the invention also relates to a device for preparing drinks such as a coffee maker, a steam iron, and a food steamer provided with a flow heater as described above.
  • a device for preparing drinks such as a coffee maker, a steam iron, and a food steamer provided with a flow heater as described above.
  • Fig. 1 is a cross-sectional view of part of a flow heater in a first embodiment of the invention
  • Fig. 2 is a view taken as in Fig. 1 , but of a flow heater in a second embodiment of the invention
  • Fig. 3 is a view taken as in Figs. 1 and 2, but of a flow heater in a third embodiment of the invention
  • Fig. 4 is a diagrammatic plan view of a first example of a channel pattern of a flow heater according to the invention
  • Fig. 5 is a diagrammatic plan view of a second example of a channel pattern of a flow heater according to the invention.
  • Fig. 6 is a diagrammatic cut-away side elevation of a coffee maker with a flow heater according to the third embodiment of the invention.
  • Fig. 7 is a diagrammatic cut-away side elevation of an electric steam iron with a flow heater according to the third embodiment of the invention
  • Fig. 8 is a diagrammatic cut-away side elevation of a steamer vessel with a flow heater according to the third embodiment of the invention.
  • the invention will now be explained first with reference to the example shown in Fig. 1.
  • the portion of a flow heater for heating water as shown in Fig. 1 is composed of a heat-conducting element 1 and a heater element 2 which is thermally coupled to the heat- conducting element 1.
  • the heat-conducting element 1 is formed by a heat distribution plate 3 and a closing element 4.
  • a meandering channel is present between the latter two components, which channel is intersected three times in the cross-sectional area shown in Fig.
  • Water transported through the channel 5 is heated by heat given off by the heater element 2 and transferred to the water by the heat-conducting element 1.
  • the heat distribution plate 3 and the closing element 4 then ensure an even transfer of heat, so that overheating and a locally intensified scale deposition are prevented.
  • the heater element is connected to the heat distribution plate 3 by means of an electrically insulating, but heat-conducting intermediate layer 3'.
  • the intermediate layer 3' may advantageously be provided on the plate 3 by means of a spin-coating method which is known per se. In the spin-coating process, a plate is quickly rotated, and a few drops of a liquid are applied to the center of the plate, which liquid will subsequently cover the entire surface of the plate under the influence of the rotation of the plate.
  • the heater element 2 is constructed in a known manner as a resistance layer provided on the electrically insulating intermediate layer 3' of the heat distribution plate 3 with two electrical connections (not shown), the resistance layer being formed by a layer of synthetic resin with electrically conducting particles present therein.
  • a heater element is described, for example, in European patent application 0 250 905.
  • the closing element 4 is thermally connected to a first side 13 of the heat distribution plate 3 in regions 6 laterally of the channel.
  • the heater element 2 is situated at a second side 14 of the heat distribution plate 3 facing away from the first side 13.
  • the closing element 4 in this example is connected to the heat distribution plate 3 in the regions 6 alongside the channel 5 by means of welding. A very effective heat transfer through the heat distribution plate 3 to the closing element 4 is obtained thereby. It is also possible, however, to use alternative connecting techniques, such as soldering or gluing.
  • the connections in the regions 6 between the closing element and the first side 13 of the heat distribution plate 3 are impermeable to liquids. Important boundary conditions are resistance to water at high temperatures and, especially in appliances used for preparing food and drink for human consumption, the prevention of generation of substances which are detrimental to human health.
  • the pattern in which the channel 5 extends is determined in a simple manner by the shape of the closing element 4, which affords a wide freedom of choice for the shapes without additional manufacturing expenses being involved.
  • the heat distribution plate 3, which comprises comparatively much material, is of a simple shape here, while it may nevertheless have a shape adapted for an intensive contact with the closing element 4, for example at the first side 13.
  • the closing element 4 in this example is constructed as a plate with a substantially uniform thickness, which is advantageous for limiting the material cost.
  • the shape required for achieving the desired shape of the channel 5 is provided in a simple manner here in that the plate is pressed into shape. It is alternatively possible, however, to provide a closing element of non-uniform thickness constructed, for example, as a casting product with a substantially planar surface at the side facing away from the heat distribution plate.
  • a duct 27, 47 lies enclosed between the heat distribution plate 23, 43 and the closing element 24, 44, thus defining the channel 25, 45.
  • the connection between the heat distribution plate 23, 43 and the closing element 24, 44 need not be watertight along the outer contour, and connecting of the lines upstream and downstream of the channel 25, 45 may be effected simply through connection to the duct 27, 47, or in that these lines are constructed as an extension of the duct 27, 47.
  • the closing element 4, furthermore, is in thermal contact with a major portion of the surface of the duct 27, 47, which benefits the heat transfer from the heater element 22, 42 through the intermediate layer 23', 43' to the water flowing through the channel 25, 45.
  • the closing element 24, 44 furthermore, keeps the duct 27, 47 in place against the heat distribution plate 23, 43. It is also advantageous if the duct 27, 47 is somewhat flattened at its side facing the heat distribution plate 23, 43. The contact surface area between the duct 27, 47 and the plate 23, 43 is enlarged thereby, which is favorable for the heat transfer.
  • a heating plate 48 is additionally provided against a side of the closing plate 44 facing away from the heat distribution plate 43.
  • the heating plate 48 is in thermally conductive contact with the closing plate 44 and can thus serve, for example, as a hot plate for keeping a jug of coffee placed thereon or a sole plate of an electric steam iron at the correct temperature.
  • Fig. 4 also shows an inlet 31 and an outlet 32 which are formed by portions of the duct 27 which bounds the channel 25, which portions project from the heat distribution plate 3.
  • Tubing elements for example made of rubber, may be connected to the inlet 31 and the outlet 32 in a known manner for the supply of water and the discharge of water and/or steam.
  • the connections 31, 32 for the supply and discharge of water in the flow heater shown in Fig. 4 are situated next to one another at one and the same side of the flow heater. This is convenient for mounting of the flow heater.
  • Fig. 5 shows an alternative arrangement of the channel as compared with Fig. 2, the channel 25 now following a spiraling course.
  • a shape offers the advantage that the duct 27 need not be bent with a small radius and that accordingly the flow resistance is small.
  • the hot plate may be designed such that the coffee jug makes contact with the hot plate in certain locations such as, for example, an inner or outer region; a good heat transfer between the plate and the jug will then take place only in the regions of contact. The amount of heat supplied to the jug may thus be controlled.
  • the processing temperature is considerably lower than for known insulating layers such as, for example, enamel.
  • the heat distribution plate 23 can be manufactured from aluminum or an aluminum alloy. This material is a good heat conductor, is light in weight, and is easy to process.
  • the heat distribution plate is round in shape, so that the spin- coating process can be more efficiently performed.
  • the side of the heat distribution plate facing away from the channel structure is preferably planar, partly also for reducing the manufacturing cost and for facilitating the provision of the intermediate layer through spin- coating and the subsequent application of the heating layer.
  • the flow heater proposed may be used to particular advantage in mass- produced consumer products in view of the great freedom as regards its shape and its low manufacturing cost.
  • Fig. 6 shows by way of example a drinks preparation device in the form of a filter-type coffee maker with a water reservoir 55, a water feed line 56 with a non-return valve 57 arranged therein, a flow heater in accordance with Fig. 3, a hot water line 58, a filtration device 59 in which the water is brought into contact with ground coffee 60, and a coffee jug 61 for catching the coffee flowing from the coffee holder 60.
  • the coffee jug is placed on the hot plate 47 of the flow heater.
  • the operation of such a filter-type coffee maker is presumed to be generally known and is accordingly not explained any further here.
  • Fig. 7 shows a steam iron with a flow heater in accordance with the basic configuration shown in Fig. 3.
  • the steam iron has a water reservoir 62 with a fill opening 63.
  • a pump 64 is connected to the water reservoir 62, and to an electrical supply circuit with a control switch which can be operated via a pushbutton 67 in a handle 68 of the iron.
  • the flow heater is situated downstream of the pump 64, the heating plate 48 at the same time forming the sole plate, and is provided with steam outlet openings 69 which are in communication with the flow heater and which are situated downstream thereof. If steam supply is desired, the switch 66 is energized for activating the pump 64, whereby water is pumped into the flow heater.
  • Fig. 8 shows an application of the flow heater of Fig. 2 in a food steamer.
  • the food steamer or steam pan is provided with a water reservoir 70.
  • the water reservoir 70 is connected to the flow heater via a water feed line 71.
  • a non-return valve 72 is included in the water feed line.
  • a steam line 74 is connected downstream of the flow heater and issues into a preparation space 75 in which food 76 to be steamed is placed.
  • the steam generated in the flow heater is used for cooking the food in the preparation space 75.
  • the invention is not limited to the use of this liquid. Indeed, the invention may also be applied to the heating of alternative liquids such as, for example, oil. Neither is the invention limited to the devices mentioned; it will be obvious to those skilled in the art that the invention may be used to advantage in a plurality of other appliances, for example steaming devices for facial treatment, wallpaper removal steamers, radiators, steam cleaning devices, vacuum cleaners with a steam supply, and appliances for making tea.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Apparatus For Making Beverages (AREA)

Abstract

L'invention porte sur un élément chauffant d'un écoulement destiné à chauffer un liquide et constitué d'un élément conducteur de chaleur (1) pourvu d'un canal (5) dans lequel le liquide à chauffer est guidé et d'un élément chauffant (2) coupé thermiquement à l'élément conducteur de chaleur (1). L'élément conducteur de chaleur (1) est composé d'une plaque de distribution de chaleur (3) et d'un élément de retenue (4). Cet élément de retenue (4) est raccordé thermiquement à un premier côté (13) de la plaque de distribution de chaleur (3) de sorte que la plaque (3) et l'élément de retenue (4) renferment le canal (5). L'élément chauffant (2) est placé au niveau d'un second côté (14) de la plaque de distribution de chaleur (3) qui est opposée au premier côté (13). L'élément chauffant l'écoulement a une structure simple et permet une grande liberté de choix concernant la forme du chemin suivi par le canal (5).
PCT/EP2001/010719 2000-09-27 2001-09-14 Element chauffant d'un ecoulement WO2002027246A1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
EP01980395A EP1337792A1 (fr) 2000-09-27 2001-09-14 Element chauffant d'un ecoulement

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP00203349 2000-09-27
EP00203349.6 2000-09-27

Publications (1)

Publication Number Publication Date
WO2002027246A1 true WO2002027246A1 (fr) 2002-04-04

Family

ID=8172074

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/EP2001/010719 WO2002027246A1 (fr) 2000-09-27 2001-09-14 Element chauffant d'un ecoulement

Country Status (3)

Country Link
US (1) US20020071665A1 (fr)
EP (1) EP1337792A1 (fr)
WO (1) WO2002027246A1 (fr)

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005118944A1 (fr) * 2004-06-02 2005-12-15 Koninklijke Philips Electronics N.V. Generateur de vapeur comprenant au moins un canal de vapeur en spirale et au moins un element de chauffage a resistance plate
WO2006040556A1 (fr) * 2004-10-13 2006-04-20 Kenwood Limited Appareils generateurs de vapeur comprenant un moyen de traitement d’eau
GB2483657A (en) * 2010-09-15 2012-03-21 Topmaster In Tech Ltd Low power consumption water heating apparatus
WO2011158028A3 (fr) * 2010-06-15 2012-03-29 Otter Controls Limited Dispositifs de chauffage de film épais
EP2498573A1 (fr) * 2011-03-11 2012-09-12 Seal Analytical GmbH Bobine planaire, dispositif de chauffage et procédé de chauffage
CN105737126A (zh) * 2016-03-30 2016-07-06 孙健 一种石英管即时过热蒸汽发生器
CN109219171A (zh) * 2017-06-30 2019-01-15 杭州三花研究院有限公司 电加热器
DE102021113148A1 (de) 2021-05-20 2022-11-24 Eberspächer Catem Gmbh & Co. Kg Elektrische Heizvorrichtung

Families Citing this family (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP1391659A1 (fr) * 2002-08-21 2004-02-25 gabo Systemtechnik GmbH Echangeur de chaleur avec un tube enroulée en spirale plat
CN101196288A (zh) * 2006-12-08 2008-06-11 厦门灿坤实业股份有限公司 熨斗及其蒸汽产生装置
JP5378729B2 (ja) * 2008-08-29 2013-12-25 アァルピィ東プラ株式会社 樹脂成形体及びその製造方法
FR2943296A1 (fr) * 2009-03-19 2010-09-24 Valeo Systemes Dessuyage Dispositif de chauffage de liquide pour vehicule automobile
KR102405738B1 (ko) 2017-06-30 2022-06-07 항저우 산후아 리서치 인스티튜트 컴퍼니 리미티드 전기 히터

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1418011A (en) * 1921-10-12 1922-05-30 Kurt Glahn Dr Electrical water heater
US4508957A (en) * 1982-09-24 1985-04-02 Onofrio Rocchitelli Thermostatically controlled electric heating device for motor vehicle glass washing fluid
DE3925549A1 (de) 1989-08-02 1991-02-07 Inter Control Koehler Hermann Heizeinrichtung
GB2305233A (en) * 1995-09-15 1997-04-02 Welwyn Components Ltd Water heater with thick film printed circuit

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1418011A (en) * 1921-10-12 1922-05-30 Kurt Glahn Dr Electrical water heater
US4508957A (en) * 1982-09-24 1985-04-02 Onofrio Rocchitelli Thermostatically controlled electric heating device for motor vehicle glass washing fluid
DE3925549A1 (de) 1989-08-02 1991-02-07 Inter Control Koehler Hermann Heizeinrichtung
GB2305233A (en) * 1995-09-15 1997-04-02 Welwyn Components Ltd Water heater with thick film printed circuit

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2005118944A1 (fr) * 2004-06-02 2005-12-15 Koninklijke Philips Electronics N.V. Generateur de vapeur comprenant au moins un canal de vapeur en spirale et au moins un element de chauffage a resistance plate
WO2006040556A1 (fr) * 2004-10-13 2006-04-20 Kenwood Limited Appareils generateurs de vapeur comprenant un moyen de traitement d’eau
CN103140721A (zh) * 2010-06-15 2013-06-05 翱泰温控器(深圳)有限公司 厚膜加热器
WO2011158028A3 (fr) * 2010-06-15 2012-03-29 Otter Controls Limited Dispositifs de chauffage de film épais
US9854626B2 (en) 2010-06-15 2017-12-26 Ferro Techniek Holding B.V. Thick film heaters
GB2483657A (en) * 2010-09-15 2012-03-21 Topmaster In Tech Ltd Low power consumption water heating apparatus
GB2483657B (en) * 2010-09-15 2013-07-31 Topmaster In Tech Ltd A mini size low power consumption water heating apparatus and method of manufacturing the same
EP2498573A1 (fr) * 2011-03-11 2012-09-12 Seal Analytical GmbH Bobine planaire, dispositif de chauffage et procédé de chauffage
WO2012123278A1 (fr) * 2011-03-11 2012-09-20 Seal Analytical Gmbh Bobine plane, dispositif chauffant et procédé de chauffage
CN103493584A (zh) * 2011-03-11 2014-01-01 密封分析仪器有限责任公司 平坦盘卷、加热装置及加热方法
US9217607B2 (en) 2011-03-11 2015-12-22 Seal Analytical Gmbh Planar coil, heating device and method of heating
CN105737126A (zh) * 2016-03-30 2016-07-06 孙健 一种石英管即时过热蒸汽发生器
CN109219171A (zh) * 2017-06-30 2019-01-15 杭州三花研究院有限公司 电加热器
CN109219171B (zh) * 2017-06-30 2021-01-12 杭州三花研究院有限公司 电加热器
DE102021113148A1 (de) 2021-05-20 2022-11-24 Eberspächer Catem Gmbh & Co. Kg Elektrische Heizvorrichtung

Also Published As

Publication number Publication date
US20020071665A1 (en) 2002-06-13
EP1337792A1 (fr) 2003-08-27

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