EP1935211B1 - Dispositif de chauffage de fluide avec fusible thermique - Google Patents

Dispositif de chauffage de fluide avec fusible thermique Download PDF

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Publication number
EP1935211B1
EP1935211B1 EP06808221A EP06808221A EP1935211B1 EP 1935211 B1 EP1935211 B1 EP 1935211B1 EP 06808221 A EP06808221 A EP 06808221A EP 06808221 A EP06808221 A EP 06808221A EP 1935211 B1 EP1935211 B1 EP 1935211B1
Authority
EP
European Patent Office
Prior art keywords
power
electric heating
heating means
switch
configuration
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.)
Not-in-force
Application number
EP06808221A
Other languages
German (de)
English (en)
French (fr)
Other versions
EP1935211A1 (fr
Inventor
Hervé Gaulard
Thierry Gourand
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.)
SEB SA
Original Assignee
SEB SA
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 SEB SA filed Critical SEB SA
Publication of EP1935211A1 publication Critical patent/EP1935211A1/fr
Application granted granted Critical
Publication of EP1935211B1 publication Critical patent/EP1935211B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/74—Switches in which only the opening movement or only the closing movement of a contact is effected by heating or cooling
    • H01H37/76—Contact member actuated by melting of fusible material, actuated due to burning of combustible material or due to explosion of explosive material
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
    • H01H37/00—Thermally-actuated switches
    • H01H37/02—Details
    • H01H37/04—Bases; Housings; Mountings
    • H01H37/043—Mountings on controlled apparatus
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B1/00—Details of electric heating devices
    • H05B1/02—Automatic switching arrangements specially adapted to apparatus ; Control of heating devices
    • H05B1/0202—Switches
    • H05B1/0205—Switches using a fusible material
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/20—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater
    • H05B3/22—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible
    • H05B3/26—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base
    • H05B3/262—Heating elements having extended surface area substantially in a two-dimensional plane, e.g. plate-heater non-flexible heating conductor mounted on insulating base the insulating base being an insulated metal plate
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B3/00—Ohmic-resistance heating
    • H05B3/40—Heating elements having the shape of rods or tubes
    • H05B3/42—Heating elements having the shape of rods or tubes non-flexible
    • H05B3/46—Heating elements having the shape of rods or tubes non-flexible heating conductor mounted on insulating base
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/002—Heaters using a particular layout for the resistive material or resistive elements
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/013—Heaters using resistive films or coatings
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/016—Heaters using particular connecting means
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/017—Manufacturing methods or apparatus for heaters
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B2203/00—Aspects relating to Ohmic resistive heating covered by group H05B3/00
    • H05B2203/021—Heaters specially adapted for heating liquids

Definitions

  • the present invention relates generally to the field of devices for electric fluid heating.
  • the invention relates to a fluid heating device comprising a fluid circulation pipe, electric heating means arranged to heat the fluid passing through the fluid pipe, and a switch electrically connected to the electric heating means, this switch being selectively movable between a power configuration to allow the power supply of said electric heating means and a cut-off configuration to prohibit the power supply of said electric heating means.
  • This phenomenon occurs for example in the event of failure of a thermostat for measuring a temperature of the device.
  • the present invention aims to propose a solution to cut the power supply of the electric heating means in case of overheating beyond a critical threshold of the fluid heating device.
  • the device of the invention is essentially characterized in that a thermally fusible piece is disposed close to said electric heating means to be heated by these in operation, said fuse piece being adapted to melt at least partially when at least one zone of said electric heating means exceeds a critical temperature threshold and for then cause the switch to switch its supply configuration at its cut-off configuration, the thermally fusible part being a ring surrounding at least a portion of said fluid circulation duct and at least a portion of said electric heating circuit, this fuse piece being in abutment against a zone of supporting said pipe and / or said electric heating means to be heated therein.
  • the critical temperature threshold crossing detection and effective power cutoff detection functions are dissociated from each other thus allowing a dedicated design of an element to a function.
  • the fuse piece in the form of a ring promotes a symmetrical distribution of the forces of the switch on the fuse piece, this piece thus having a very good mechanical strength without having to use a large amount of material to achieve it.
  • the ring shape also makes it possible to symmetrize the heat exchange between the fuse piece and the means of heated.
  • the switch it is possible for the switch to have an elastic portion which naturally forces it to switch to a cut-off configuration, the thermally fusible part exerting a holding force of the switch in its power configuration as long as said zone of said electric heating means has not exceeded said critical temperature threshold.
  • the holding force is then no longer exerted on the switch which then passes by itself in cut-off configuration.
  • the supply interruption is irreversible until we have manually replaced the switch in its power position and as long as the fuse has not been replaced by a new part.
  • the device comprises a main body and a complementary element covering a portion of the main body to define said pipe between the main body and an inner face of the complementary element, said switch comprising an electrically connected connection terminal the electric heating means and formed on an outer face of the complementary element which is opposite to said inner face.
  • connection terminal is preferably formed at one end of said electric heating means, thus this terminal is both an element of the electric heating means and a switch element, which is economically advantageous.
  • This flexible portion allows the switch to be naturally mono-stable in its cut-off configuration.
  • the electric heating means comprise at least one heating resistor screen printed on the outer face of the complementary element.
  • the heat produced by the resistor is directly transmitted to the water of the pipe through the wall formed by the complementary element, which minimizes heat losses and reduces the thermal inertia of the device. water in the pipe can be heated quickly.
  • thermally fusible piece has a reduced section located at the location of the support zone.
  • This characteristic makes it possible to create a privileged fusion zone that is easy to size and locate because of its shape.
  • the preferred melting zone is arranged to be essentially subjected to internal tensile forces generated by the switch (s).
  • the fuse piece is made of plastic because the melting temperature of such a part is easily predictable and adjustable by the chemistry of the composites.
  • this ring is in a material chosen to be electrically nonconductive which avoids having to isolate the contactors with respect to the ring.
  • said contactor has a notch in which is placed a portion of the fuse piece thus allowing to mechanically assemble said fuse piece and the contactor, at least as long as the contactor is in the supply position.
  • This embodiment makes it possible to have a mechanically stable switch / fuse assembly as long as this fuse piece is not melted.
  • the two switches that are held by one and the same fuse in their power configurations simultaneously go into cutoff configuration which multiplies the areas of power cuts on the same circuit and reduces the amount of circuit breakage energy to be cashed individually. by each switch of the circuit.
  • the invention relates to a fluid heating device comprising a fluid circulation line and electric heating means which are here two electrical resistances placed in parallel and arranged to heat the fluid passing through the fluid line.
  • the heating device of the invention is an improvement of the heating device presented in the patent document. FR 2,855,359 .
  • This device 1 comprises a main body 2 of cylindrical shape around which is fitted a complementary element 3 in the form of a tube.
  • a space 5a is formed between the main body 2 and the inner face 10 of the complementary element 3 to define the fluid conduit 5 between the complementary element 3 and the main body 2.
  • the fluid line 5 is spiral-shaped wound around the main body along the inner face 10 of the complementary element.
  • the main body is in material having a low thermal inertia (lower inertia than aluminum) and has at its periphery a groove in the form of a spiral opposite the inner face 10.
  • An inlet 19a and an outlet 19b of fluid communicating with the pipe allow to link the device of the invention to an external fluid circuit.
  • the electrical resistances 4 constituting the electric heating means 4 are screen-printed resistors on the outer face 12 of the complementary element 3 and form two resistive ribbons extending parallel to each other, covering at least 50% of the outer face 12.
  • resistors 4 extend between two supply terminals 11a, 11b formed on the outer face 12 of the tube-shaped complementary element 3. These supply terminals 11a, 11b are formed at the ends of the resistors and are substantially identical between they have a symmetry of shape according to-- a longitudinal sectional plane of the complementary element.
  • the supply terminals 11a and 11b are both electrically accessible from the outside of the device to enable each contactor 13a, 13b mobile to establish a selective electrical contact against the corresponding connection terminal (terminal 11a with the contactor 13a, and terminal 11b with contactor 13b).
  • the contactors are elongate metal parts having three portions of length each exerting a proper function.
  • the first portion of a contactor is an extreme rigid portion fitted into a groove dedicated to the engagement of this contactor on a peripheral protrusion of the main body 2.
  • the body at least at this location is electrically insulating, this body can be for this purpose integrally composed of plastic material.
  • Each first contactor portion is adapted to be nested with a connector power socket.
  • the second portion of a contactor is a locally elastic portion 9 also called elastic portion of the switch.
  • This second portion has the function of forcing a third portion of the contactor to deviate from the connection terminal 11a or 11b corresponding to the contactor.
  • This second portion has a flat cross section.
  • the third portion of the contactor is a contactor portion rigid along its length to allow to transmit a compressive force of the contactor on the corresponding connection terminal 11a or 11b.
  • This third portion has a substantially U-shaped cross section to give it this rigidity.
  • This third portion comprises a notched zone 16 adapted to receive in bearing a portion of the fuse piece 7.
  • a zone of the contactor preferably located in the second flexible portion is folded at V, in the direction of the length of the contactor, to form an electrical contact dedicated to the current flow between the contactor and the connection terminal of the complementary element, this contact area at the tip of the V-fold.
  • a thermally fusible piece 7 is represented alone on the figure 4 in the form of a rigid ring of internal diameter greater than the outer diameter of the complementary element.
  • This fuse piece is also represented on the Figures 2a and 2b but this time in combination with the rest of the device.
  • the fuse piece 7 surrounds the complementary element 3 and holds all the contactors in their respective supply positions.
  • the fuse piece comprises two portions of arcs 17a, 17b of a diameter substantially equal to the outer diameter of the complementary element which is represented in dashed line referenced 2.
  • Four arrows respectively represent the four forces generated by the contactors on the part fuse. These efforts tend to force the portions of arches 17a, 17b against the complementary piece.
  • These portions of arcs 17a, 17b are opposed to each other so as to form a holding zone in localized support of the fuse piece on the complementary element.
  • the fuse piece has a reduced section 15, at the location of the support zones 14 of the fuse piece against the complementary element. This section is intended to form the preferred breaking zone of the fuse piece when the complementary element is overheated.
  • this ring makes it possible to maintain the contact pressure between the contactors and the electrical connection terminals of the resistor.
  • the ring melts at the reduced sections 15 thus releases the contact pressure and opens the electrical supply circuit of the heating means.
  • FIGS. 1a, 1b, 2a, 2b , 3a, 3b four separate contactors are used to form four switches substantially identical to each other (each switch has a connector fixed on the main body and a connection terminal formed on the complementary element 3.
  • Two of these switches are arranged to allow or cut the power supply to the terminals of the heating means and two others are used to allow or cut the power supply to the terminals of a positive temperature coefficient resistor which is fixed on the complementary element 3 to measure the temperature.
  • only two blades can be used to manage the power supply of the resistors only.
  • a preferred zone 8 is arranged so that the temperature in normal operation in this zone 8 is compatible with the operating temperature of the fuse to prevent it from melting prematurely.
  • the drawing of the resistive tracks can be made in such a manner as to move the resistive tracks away from or close enough to the fuse 7.
  • the material chosen to make the fuse is a plastic material that achieves a good compromise between the temperature resistance and the cost.
  • a crystalline material whose melting temperature range is reduced is used.
  • the material of the fuse piece whose melting point is about 285 ° C., is a polyphenylene sulfide (PPS) loaded with 32% fiberglass and 32% mineral.
  • PPS polyphenylene sulfide
  • the reduced section 15 promoting the melting speed of the fuse material at this precise location is preferably 2.8mm X 1.4mm.

Landscapes

  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Combustion & Propulsion (AREA)
  • Fuses (AREA)
  • Resistance Heating (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Control Of Resistance Heating (AREA)
EP06808221A 2005-10-05 2006-09-29 Dispositif de chauffage de fluide avec fusible thermique Not-in-force EP1935211B1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR0510192A FR2891688B1 (fr) 2005-10-05 2005-10-05 Dispositif de chauffage de fluide avec fusible thermique
PCT/FR2006/002211 WO2007039681A1 (fr) 2005-10-05 2006-09-29 Dispositif de chauffage de fluide avec fusible thermique

Publications (2)

Publication Number Publication Date
EP1935211A1 EP1935211A1 (fr) 2008-06-25
EP1935211B1 true EP1935211B1 (fr) 2010-07-21

Family

ID=36602521

Family Applications (1)

Application Number Title Priority Date Filing Date
EP06808221A Not-in-force EP1935211B1 (fr) 2005-10-05 2006-09-29 Dispositif de chauffage de fluide avec fusible thermique

Country Status (12)

Country Link
US (1) US8153939B2 (ja)
EP (1) EP1935211B1 (ja)
JP (1) JP5033805B2 (ja)
KR (1) KR100948223B1 (ja)
CN (1) CN101278599B (ja)
AT (1) ATE475296T1 (ja)
AU (1) AU2006298639B2 (ja)
BR (1) BRPI0616951A2 (ja)
DE (1) DE602006015668D1 (ja)
FR (1) FR2891688B1 (ja)
RU (1) RU2366115C1 (ja)
WO (1) WO2007039681A1 (ja)

Families Citing this family (17)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE102007034370A1 (de) * 2007-07-24 2009-01-29 Bleckmann Gmbh & Co. Kg Kompakte hochdruckfähige Spiraldurchfluss-Heizeinheit
ITRM20100291A1 (it) * 2010-05-31 2011-12-01 I R C A S P A Ind Resistenz E Corazzate E Resistenza corazzata con elemento di sigillatura di estremita'
EP2407069A1 (de) 2010-07-12 2012-01-18 Bleckmann GmbH & Co. KG Dynamischer Durchlauferhitzer
JP5872759B2 (ja) * 2010-09-21 2016-03-01 Toto株式会社 人体洗浄装置
EP2849617B1 (en) 2012-05-15 2016-09-21 Bleckmann GmbH & Co. KG Helical dynamic flow through heater
FR2994891B1 (fr) * 2012-09-06 2016-10-21 Valeo Systemes Thermiques Dispositif de chauffage electrique de fluide pour vehicule automobile, circuit de chauffage et appareil de chauffage et/ou de climatisation associes
FR2994892B1 (fr) * 2012-09-06 2014-10-03 Valeo Systemes Thermiques Dispositif de chauffage electrique de fluide pour vehicule automobile, circuit de chauffage et appareil de chauffage et/ou de climatisation associes
WO2014205771A1 (en) * 2013-06-28 2014-12-31 Nestec S.A. Thick film heating device
MX2016010326A (es) * 2014-02-10 2016-10-28 Philip Morris Products Sa Unidad de calentamiento permeable al fluido para un sistema generador de aerosol y metodo para ensamblar un calentador permeable al fluido para un sistema generador de aerosol.
RU2611429C1 (ru) * 2015-11-06 2017-02-22 Александр Максимович Поплаухин Электрический нагреватель газовых и жидких сред
CN105546805B (zh) * 2016-02-05 2018-10-16 广西桂仪科技有限公司 一种液体加热装置
CN105716269B (zh) * 2016-02-05 2018-10-16 广西桂仪科技有限公司 液体加热装置
CN105571109B (zh) * 2016-02-05 2018-11-30 佛山市云米电器科技有限公司 一种水道加热装置的密封体
CN105546804B (zh) * 2016-02-05 2019-03-22 佛山市云米电器科技有限公司 一种用于液体加热的加热装置
CN109820422A (zh) * 2017-11-23 2019-05-31 德隆奇电器单一股东有限责任公司 制备饮料的机器和方法
US11675376B2 (en) 2019-01-24 2023-06-13 Tescom Corporation Temperature-controlled pressure regulator assemblies
RU200349U1 (ru) * 2020-07-16 2020-10-20 Общество с ограниченной ответственностью "Атлант-Проджект" Электрический нагреватель газовых и жидких сред

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JPS5591039U (ja) * 1978-12-19 1980-06-24
GB9413661D0 (en) * 1994-07-07 1994-08-24 Pifco Ltd Improvements to heating apparatus
US5847638A (en) * 1996-06-11 1998-12-08 Sorenson; Richard W. Thermal circuit protector and switch
GB9725099D0 (en) * 1997-11-28 1998-01-28 Philips Electronics Nv Heating element
FR2778729B1 (fr) * 1998-05-15 2003-12-05 Moulinex Sa Chaudiere pour appareil electromenager et appareil electromenager comportant une telle chaudiere
JP2001057763A (ja) * 1999-08-12 2001-02-27 Tdk Corp モータ制御装置
US6741159B1 (en) * 2002-05-16 2004-05-25 Robert A. Kuczynski Fail-safe assembly for coacting contacts in a current-carrying system, apparatus or component
FR2855359B1 (fr) * 2003-05-19 2005-07-01 Seb Sa Dispositif de chauffage d'un liquide pour appareil electromenager, appareil electromenager equipe d'un tel dispositif.
JP4223354B2 (ja) * 2003-09-01 2009-02-12 内橋エステック株式会社 サーモプロテクタ

Also Published As

Publication number Publication date
FR2891688B1 (fr) 2007-11-30
AU2006298639A1 (en) 2007-04-12
CN101278599B (zh) 2010-11-10
BRPI0616951A2 (pt) 2011-07-05
WO2007039681A1 (fr) 2007-04-12
KR20080074117A (ko) 2008-08-12
JP5033805B2 (ja) 2012-09-26
US20110103780A1 (en) 2011-05-05
ATE475296T1 (de) 2010-08-15
AU2006298639B2 (en) 2010-06-17
CN101278599A (zh) 2008-10-01
DE602006015668D1 (de) 2010-09-02
EP1935211A1 (fr) 2008-06-25
FR2891688A1 (fr) 2007-04-06
US8153939B2 (en) 2012-04-10
RU2366115C1 (ru) 2009-08-27
KR100948223B1 (ko) 2010-03-18
JP2009512126A (ja) 2009-03-19

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