EP2661151B1 - Appareil pour chauffer des fluides - Google Patents

Appareil pour chauffer des fluides Download PDF

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Publication number
EP2661151B1
EP2661151B1 EP13425054.7A EP13425054A EP2661151B1 EP 2661151 B1 EP2661151 B1 EP 2661151B1 EP 13425054 A EP13425054 A EP 13425054A EP 2661151 B1 EP2661151 B1 EP 2661151B1
Authority
EP
European Patent Office
Prior art keywords
power switch
heating
casing
pipe fitting
heating device
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.)
Active
Application number
EP13425054.7A
Other languages
German (de)
English (en)
Other versions
EP2661151A1 (fr
Inventor
Costante Dall'anese
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.)
HT SpA
Original Assignee
HT SpA
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Publication date
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Publication of EP2661151A1 publication Critical patent/EP2661151A1/fr
Application granted granted Critical
Publication of EP2661151B1 publication Critical patent/EP2661151B1/fr
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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
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1818—Arrangement or mounting of electric heating means
    • 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
    • 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
    • H05B1/0227—Applications
    • H05B1/0252—Domestic applications
    • H05B1/0258—For cooking
    • H05B1/0269—For heating of fluids
    • 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
    • H05B3/48—Heating elements having the shape of rods or tubes non-flexible heating conductor embedded in insulating material
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D2220/00—Components of central heating installations excluding heat sources
    • F24D2220/20—Heat consumers
    • F24D2220/2009—Radiators

Definitions

  • the present invention generally relates to a device for heating fluids, in particular water, which are enclosed in sealed and/or watertight containers.
  • the invention relates to a heating device usable for hot water tanks and/or water or oil radiators and/or heated towel rails.
  • a heating device of this type normally includes a resistor or resistive element, which is positioned within a tubular casing made of a thermally conductive material and which is connected to an electrical power circuit through an electronic power switch; alternatively, double-wall heating devices are provided, in which two thermally conductive tubes (and, therefore, two respective resistors) are arranged coaxially one inside the other.
  • the outer casing of the heating device is inserted in the fluid contained in the watertight container, while the upper end of the casing is securely fixed, for example by means of a suitable end flange, outside the container, so as to allow the electrical connection of the resistor.
  • the terminal flange inside which the heating resistor is placed, can be made with a thermally conductive material and a switch of the electrical power circuit (usually a TRIAC) can be placed in a suitable cavity of said flange, so that the flange's structure allows heat dissipation, during the TRIAC functioning, through the walls of the outer casing.
  • a switch of the electrical power circuit usually a TRIAC
  • Said structure allows to reduce substantially the electric power dissipation and therefore the excessive heating of the TRIAC; however, to achieve this purpose, it is necessary to made on purpose the end flange of the heating device and it is also necessary to provide a suitable thickness of said flange so as to place the TRIAC, thus causing large overall dimensions of the whole structure, high costs and problems when making electrical connections which would be desirable to remove and at least to reduce.
  • heating devices with resistors which are enclosed within an insulating material and which are connected to a power source through a temperature sensor; said sensor is placed inside the insulating material and is able to break off the electrical power supply to the resistor on the basis of the temperature's values that are detected.
  • EP1278400 , EP317435 and EP1655546 disclose heating devices having the features of the preamble of the appended claim 1.
  • said embodiments cannot be used to limit the power and heat dissipation of the electrical power supply circuit which is connected to the heating element, since the temperature sensor must be able to detect a temperature's value very close to the temperature's value of the resistor and, therefore, there is no need for dissipating electric power and/or heat near said sensor element.
  • An object of the present invention is therefore to obviate the above mentioned drawbacks of the prior art and, in particular, to provide a device for heating fluids which circulate inside radiators and/or heated towel rails, which allows a suitable electric power dissipation and a subsequent dissipation of the heat generated by the electrical power switch (TRIAC) which is connected to the power supply circuit of the resistor, which is in turn placed within a casing made of a thermally conductive material.
  • Another object of the invention is to provide a device for heating fluids, in particular for radiators and/or towel rails, which allows to obtain a compact structure with small size, with respect to the prior art.
  • Another object of the invention is to provide a device for heating fluids, which is particularly effective, reliable, handy and cheap, with respect to the prior art, during assembly and installation of the electrical connections.
  • a device for heating fluids in particular for radiators and/or heated towel rails, according to the appended claim 1; further technical detailed features of the heating device of the invention are also set forth in the corresponding dependent claims.
  • the TRIAC switch of the electric power circuit is placed within a specific fitting or connector, made of thermally conductive material and connected to the tubular container of the heating resistor.
  • the physical connection between the fitting and the radiant surface of the heating apparatus allows to obtain a considerable power and heat dissipation, since said surface is very large.
  • the use of the connector allows to have a highly protective function of the TRIAC, both from mechanical and electrical point of view, as well as the electrical connections are extremely easier.
  • the resistive element is usually placed inside a powder or an electrically insulating compound, which is compacted inside the casing 10, and has two electrical terminals, connected to respective electrical conductors, which protrude from the casing 10, passing through a pipe fitting or connector 11, made of thermally conductive material, in order to be connected to an electric and/or electronic power circuit placed outside the heating device.
  • the switch of the electrical power circuit is constituted by a TRIAC 12, which is connected, on one side, to the resistive element and, on the other side, to the electrical power circuit through suitable cables.
  • the TRIAC 12 is inserted within an opening 14, preferably oval-shaped or oblong-shaped, which is provided in a central region of the fitting 11, so that said TRIAC 12 contacts one of the inner walls 13 of the fitting 11 (as viewed in detail in the enclosed figures 4 and 5 ).
  • the TRIAC 12 is advantageously inserted through the opening 14 and inside the compartment or inner duct 16 of the fitting 11, together with a spring or an elastic or elastomeric element 15, which is inserted between the TRIAC 12 and the duct's 16 inner wall, opposite to the wall 13, thus obtaining a great stability of the TRIAC 12, which is wedged and forced to maintain its lower surface into contact with the inner walls 13 of the fitting 11.
  • the TRIAC 12 and the elastomeric or elastic element 15 may also be enclosed within a thermally and electrically insulating thin sheet or sheath, in order to increase the electrical insulation between said power switch (the TRIAC 12) and the resistive element contained inside the tubular casing 10.
  • the TRIAC 12 already coupled to the elastic element 15 and possibly surrounded by insulation, can be simply inserted into the shaped opening 14 of the fitting 11.
  • Said insertion automatically causes the electrical connection of the TRIAC 12 to the resistive element which is placed inside the tubular casing 10, as well as a stable positioning of said TRIAC 12 in correspondence of a portion of the inner walls 13 of the fitting 11, so as to ensure an effective dissipation of the heat generated by the TRIAC 12 during its functioning, directly through the outer peripheral wall of the fitting 11.

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)
  • Food Science & Technology (AREA)
  • Resistance Heating (AREA)
  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)

Claims (7)

  1. Dispositif pour chauffer des fluides, en particulier pour chauffer au moins un fluide circulant dans une structure chauffante telle qu'un radiateur à eau ou à huile et/ou un porte-serviettes chauffé, comprenant au moins un boîtier (10), réalisé en matériau thermiquement conducteur, au sein duquel au moins un élément résistif est placé, ledit élément résistif ayant des bornes électriques respectives raccordées à des conducteurs électriques respectifs qui dépassent dudit boîtier (10) et lesdits conducteurs électriques étant raccordés à un circuit d'alimentation électronique comportant un commutateur d'alimentation (12), qui est raccordé quant à lui, sur un côté, audit au moins un élément résistif et, sur l'autre côté, audit circuit d'alimentation, ledit commutateur d'alimentation (12) étant placé au sein d'un compartiment ou conduit interne (16) d'un raccord de tuyau (11), réalisé en matériau thermiquement conducteur et ayant au moins une ouverture (14) au niveau d'une de ses extrémités, qui est raccordée audit boîtier (10) et positionnée coaxialement par rapport audit boîtier (10) et à travers laquelle passent lesdits conducteurs électriques, caractérisé en ce que ledit commutateur d'alimentation (12) est raccordé directement aux parois internes (13) dudit raccord de tuyau (11), de façon à dissiper efficacement la chaleur générée pendant son fonctionnement en dehors dudit compartiment ou conduit (16) directement par l'intermédiaire des parois périphériques extérieures dudit raccord de tuyau (11).
  2. Dispositif chauffant selon la revendication 1, caractérisé en ce que ladite ouverture (14) a une forme oblongue et/ou ovale.
  3. Dispositif chauffant selon au moins l'une des revendications précédentes, caractérisé en ce que ledit au moins un élément résistif est incorporé dans un composé en poudre ou isolant, qui est compacté au sein du boîtier (10).
  4. Dispositif chauffant selon au moins l'une des revendications précédentes, caractérisé en ce que ledit commutateur d'alimentation (12) est constitué d'un dispositif électronique, tel qu'un TRIAC.
  5. Dispositif chauffant selon au moins l'une des revendications précédentes, caractérisé en ce que ledit commutateur d'alimentation (12) est couplé à au moins un élément élastomérique ou élastique (15), qui est inséré entre ledit commutateur d'alimentation (12) et une paroi intérieure dudit compartiment ou conduit (16) du raccord de tuyau (11), de sorte que ledit commutateur d'alimentation (12) soit calé à l'intérieur du conduit (16), conservant ainsi sa surface en contact avec lesdites parois internes (13) dudit raccord de tuyau (11).
  6. Dispositif chauffant selon au moins l'une des revendications précédentes, caractérisé en ce que ledit commutateur d'alimentation (12) et ledit élément élastique ou élastomérique (15) sont encloisonnés au sein d'au moins une gaine thermiquement et électriquement isolante, de façon à augmenter l'isolation électrique entre ledit commutateur d'alimentation (12) et ledit au moins un élément résistif.
  7. Dispositif chauffant selon au moins l'une des revendications précédentes, caractérisé en ce que ladite ouverture (14) est prévue dans une région sensiblement centrale dudit raccord de tuyau (11).
EP13425054.7A 2012-05-02 2013-04-10 Appareil pour chauffer des fluides Active EP2661151B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000103A ITVI20120103A1 (it) 2012-05-02 2012-05-02 Dispositivo riscaldante per fluidi

Publications (2)

Publication Number Publication Date
EP2661151A1 EP2661151A1 (fr) 2013-11-06
EP2661151B1 true EP2661151B1 (fr) 2017-07-05

Family

ID=46210371

Family Applications (1)

Application Number Title Priority Date Filing Date
EP13425054.7A Active EP2661151B1 (fr) 2012-05-02 2013-04-10 Appareil pour chauffer des fluides

Country Status (2)

Country Link
EP (1) EP2661151B1 (fr)
IT (1) ITVI20120103A1 (fr)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200008582A1 (it) * 2022-04-29 2023-10-29 Ht S P A Dispositivo riscaldante per fluidi

Family Cites Families (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2623685A1 (fr) * 1987-11-19 1989-05-26 Andre David Element chauffant electrique a tube en verre et a dispositif de securite detectant la defaillance de ce dernier
AUPN560795A0 (en) * 1995-09-25 1995-10-19 Stokes (Australasia) Limited Heating element assembly
FR2827735B1 (fr) * 2001-07-20 2003-09-12 Jedac Element chauffant
ITVI20030248A1 (it) * 2003-12-09 2005-06-10 Luigi Borelli Gruppo riscaldante per elementi radianti a fluido diatermico

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
IT202200008582A1 (it) * 2022-04-29 2023-10-29 Ht S P A Dispositivo riscaldante per fluidi
EP4271128A1 (fr) * 2022-04-29 2023-11-01 HT S.p.A. Dispositf de chauffage de fluide

Also Published As

Publication number Publication date
ITVI20120103A1 (it) 2013-11-03
EP2661151A1 (fr) 2013-11-06

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