EP1655546A1 - Wärmegruppe für ein diathermisches Flüssigkeitsstrahlungselement - Google Patents

Wärmegruppe für ein diathermisches Flüssigkeitsstrahlungselement Download PDF

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Publication number
EP1655546A1
EP1655546A1 EP04106370A EP04106370A EP1655546A1 EP 1655546 A1 EP1655546 A1 EP 1655546A1 EP 04106370 A EP04106370 A EP 04106370A EP 04106370 A EP04106370 A EP 04106370A EP 1655546 A1 EP1655546 A1 EP 1655546A1
Authority
EP
European Patent Office
Prior art keywords
thermo
heating group
solid
state switch
conductive
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.)
Withdrawn
Application number
EP04106370A
Other languages
English (en)
French (fr)
Other versions
EP1655546A3 (de
Inventor
Luigi Borelli
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.)
Individual
Original Assignee
Individual
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 Individual filed Critical Individual
Publication of EP1655546A1 publication Critical patent/EP1655546A1/de
Publication of EP1655546A3 publication Critical patent/EP1655546A3/de
Withdrawn legal-status Critical Current

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Classifications

    • 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
    • H05B3/02—Details
    • H05B3/06—Heater elements structurally combined with coupling elements or holders
    • H05B3/08—Heater elements structurally combined with coupling elements or holders having electric connections specially adapted for high temperatures
    • 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
    • F24H9/00—Details
    • F24H9/20—Arrangement or mounting of control or safety devices
    • F24H9/2064—Arrangement or mounting of control or safety devices for air heaters
    • F24H9/2071—Arrangement or mounting of control or safety devices for air heaters using electrical energy supply
    • 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
    • H05B3/44—Heating elements having the shape of rods or tubes non-flexible heating conductor arranged within rods or tubes of insulating material
    • 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
    • F24H3/00—Air heaters
    • F24H3/002—Air heaters using electric energy supply
    • F24H3/004—Air heaters using electric energy supply with a closed circuit for a heat transfer liquid

Definitions

  • the present invention is about a heating group for diathermic fluid radiant elements, in particular radiators and towel heaters especially for domestic use.
  • a radiator or a towel heater of known type comprises a heating group consisting of a tubular body inserted in the radiant element and put in contact with the diathermic fluid, which contains an insulating material in which one or more electric resistances are inserted.
  • the tubular body is provided at one end with a tubular sleeve for the fastening to the radiant element, and through it they pass conductive elements for the connection of the electric resistance to a feeding group, which is housed in a box fixed to the radiant element.
  • the feeding group comprises a solid-state switch, generally a bidirectional thyristor commonly called TRIAC or SCR, connected to electronic control means which set its switching on and switching off.
  • a solid-state switch generally a bidirectional thyristor commonly called TRIAC or SCR
  • the thyristor cooling is particularly difficult, since the box in which it is contained is closed to avoid the entrance of humidity or water.
  • the considerable heat produced by the thyristor makes the temperature inside the box to increase, and this can compromise the correct operation of the electronic components.
  • the present invention intends to overcome the aforementioned inconveniences.
  • the heating group of the invention maintains at least the same electric safety standards found in the prior art heating groups.
  • a heating group for diathermic fluid radiant elements which, according to the main claim, comprises:
  • the solid-state switch is a bidirectional thyristor coupled with a support base incorporated in the thermo-conductive core.
  • First terminals for the connection to the electric resistance, second terminals for the connection to the distribution power grid and third terminals for the connection to the electronic control means of the thyristor are present in the support base.
  • the support base comprises a printed circuit consisting of conductive stripes to connect the solid-state switch to the connection terminals.
  • the solid-state switch is incorporated in the thermo-conductive core, being connected in the air to the electric resistance, to the distribution power grid and to the electronic control means.
  • the heating group also comprises a resistive protection element with positive temperature coefficient, commonly called PTC (Positive Temperature Control), which is connected in series between the solid-state switch and the electronic control means which control its switching on and switching off.
  • PTC Positive Temperature Control
  • the heating group of the invention is more reliable with respect to the known heating groups, since the thermal dispersion that the thyristor carries out inside the sleeve that houses it is greater than that achievable in known embodiments, in which the thermal exchange takes place directly in the air or by means of heat sinks.
  • the heating group of the invention is also more reliable in its operation with respect to the equivalent heating groups of known type.
  • the presence of the resistive element with positive temperature coefficient warrants an effective protection against the electric resistance burnout, especially in case of the specific load on the resistance is raised beyond unacceptable values for a lack of contact with the diathermic fluid.
  • the heating group of the invention is shown in Figures 1 to 4, where it is generally indicated with numeral 1.
  • heating group of the invention could be also applied to fixed or mobile radiant element of other kind.
  • the heating group 1 comprises a heater 2 of known type, which is inserted in a housing 3 present in the radiant element A, B and which, as one can see in greater detail in Figure 5, is composed by a tubular body 4 put in contact with the diathermic fluid, said body containing an electric insulator 4a in which an electric resistance, schematically shown in Figure 5 and indicated with numeral 5 , is inserted.
  • thermo-fuse 5a and a protective electro mechanic thermostat 5b disposed inside the tubular body 4, are coupled with the resistance 5.
  • a tubular sleeve is disposed at the end of the tubular body 4 and it is provided with fastening means consisting, for example, of a threaded collar 6a which is screwed to the radiant element.
  • the fastening means could also be of other kind, like for instance screws.
  • the heating group 1 also comprises a feeding group, generally indicated with numeral 7 and shown in axonometric view in Figure 6, provided with a solid-state switch 8 for the connection of the electric resistance 5 to a distribution power grid 9 according to the electric diagram of Figure 10.
  • Electronic control means generally indicated with numeral 10 and shown in the electric diagram of Figure 10, are present too for switching off and switching on the switch 8.
  • the solid-state switch 8 is disposed inside the sleeve 6, where it is contained in a thermo-conductive core 11 adherent to the inner wall 6a of the sleeve 6.
  • the solid-state switch 8 is coupled with a support base 12, which is incorporated in the thermo-conductive core 11 and on which are present:
  • the support base 12 comprises conductive stripes 16 to connect the solid-state switch 8 to the connection terminals 13, 14 and 15 which are completely immersed in the thermo-conductive core 11 after the support base 12 has been inserted in the tubular sleeve 6.
  • thermo-conductive core 11 comprises a first thermo-conductive body 17 with a circular sector cross section, made of metallic material, and a second thermo-conductive body 18, made of thermo-conductive resin, between which the support base 12 is present, as one can see in detail in Figure 6.
  • the manufacturing process provides for the assembly of the solid state switch 8 on the support base 12 and the connection of the terminals to the respective wires, and thus the fastening of the base 12 to the first thermo-conductive body 17 through fastening means.
  • the support base 12 together with the thermo-conductor 17, is inserted in the tubular sleeve 6.
  • thermo-conductive resin the space inside the sleeve 6 comprised between the support base 12 and the inner surface 6a of the sleeve 6 is filled with thermo-conductive resin, obtaining the second thermo-conductive body 18 shown in Figure 6a.
  • thermo-conductive core 11 perfectly adheres with interference to the inner surface 6a of the sleeve 6 , providing for the connection stability of the support base 12 and all the components associated therewith inside the tubular sleeve 6.
  • thermo-conductive core 11 The perfect adhesion of the thermo-conductive core 11 to the inner surface 6a of the sleeve 6 enhances the thermal exchange and assures the operation of the solid-state switch 8 at an optimal constant temperature, comprised between 70°C and 80°C, thus considerably below the dangerous threshold of 100°C.
  • FIG. 7 and 7a A different executive embodiment of the invention is shown in Figures 7 and 7a, which is different from that previously described in that the support base 12 of the solid-state switch 8 and the terminals 13, 14 and 15 is incorporated in a single thermo-conductive body, generally indicated with numeral 19, which is obtained injecting thermo-conductive resin inside the sleeve 6 after the insertion of the support base 12, centred on the sleeve 6.
  • FIG. 8 and 8a Another executive embodiment is shown in Figures 8 and 8a, and it differs from those previously described in that the solid-state switch 8 is assembled in the air directly to the conductors 13a for the connection to the electric resistance 5, to the conductors 14a for the connection to the distribution power grid 9 and to the conductor 15a for the connection to the electronic control means 10.
  • thermo-conductive core generally indicated with numeral 20, which is obtained injecting thermo-conductive resin inside the sleeve 6 after the interposition of an insulating ring 21 circumferentially close to the inner surface 6a of said sleeve 6.
  • the resistive element 22 is connected in series between the solid-state switch 8 and the electronic control means 10 which control its switching on and switching off.
  • the heating group of the invention could be applied to radiant elements of any kind, both of fixed installation and of mobile installation.
  • thermo-conductive materials used could be of any kind, as long as thermo-conductive and thus able to provide for an optimal dispersion of the heat produced by the solid-state switch during operation.
  • said switch could be a thyristor of TRIAC or SCR type.

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)
  • Resistance Heating (AREA)
EP04106370A 2003-12-09 2004-12-07 Wärmegruppe für ein diathermisches Flüssigkeitsstrahlungselement Withdrawn EP1655546A3 (de)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
IT000248A ITVI20030248A1 (it) 2003-12-09 2003-12-09 Gruppo riscaldante per elementi radianti a fluido diatermico

Publications (2)

Publication Number Publication Date
EP1655546A1 true EP1655546A1 (de) 2006-05-10
EP1655546A3 EP1655546A3 (de) 2006-07-26

Family

ID=35520866

Family Applications (1)

Application Number Title Priority Date Filing Date
EP04106370A Withdrawn EP1655546A3 (de) 2003-12-09 2004-12-07 Wärmegruppe für ein diathermisches Flüssigkeitsstrahlungselement

Country Status (2)

Country Link
EP (1) EP1655546A3 (de)
IT (1) ITVI20030248A1 (de)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2000747A3 (de) * 2007-06-08 2009-07-08 José Romero Pérez Modularer elektrischer Heizkörper
FR2932551A1 (fr) * 2008-06-11 2009-12-18 Atlantic Industrie Sas Radiateur a fluide caloporteur a lames chauffantes et son procede de fabrication.
FR2945107A1 (fr) * 2009-05-04 2010-11-05 Atlantic Industrie Sas Radiateur electrique a fluide caloporteur forme d'elements modulaires moules
ITVI20120103A1 (it) * 2012-05-02 2013-11-03 Ht S P A Dispositivo riscaldante per fluidi
IT202200008582A1 (it) * 2022-04-29 2023-10-29 Ht S P A Dispositivo riscaldante per fluidi

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317435A1 (de) * 1987-11-19 1989-05-24 David André Isoliertes elektrisches Heizelement mit einer Sicherungsvorrichtung, welche ein Ausfallen der elektrischen Isolierung aufspürt
US6147335A (en) 1997-10-06 2000-11-14 Watlow Electric Manufacturing Co. Electrical components molded within a polymer composite
EP1081986A2 (de) * 1999-09-02 2001-03-07 Bleckmann GmbH Rohrheizkörper mit NTC/PTC-Absicherung
EP1156704A1 (de) * 2000-05-17 2001-11-21 Acova Tauchheizkörper formende Vorrichtung zur Verwendung insbesondere in Heizkörpern von Heisswasserkreislaufheizungen
EP1278400A2 (de) 2001-07-20 2003-01-22 Jedac Heizelement
DE10209905A1 (de) 2002-03-07 2003-09-18 Stiebel Eltron Gmbh & Co Kg Elektrisches Heizgerät, insbesondere Durchlauferhitzer
WO2003100326A1 (en) * 2002-05-24 2003-12-04 Irca S.P.A. Control arrangement for heating devices

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0317435A1 (de) * 1987-11-19 1989-05-24 David André Isoliertes elektrisches Heizelement mit einer Sicherungsvorrichtung, welche ein Ausfallen der elektrischen Isolierung aufspürt
US6147335A (en) 1997-10-06 2000-11-14 Watlow Electric Manufacturing Co. Electrical components molded within a polymer composite
EP1081986A2 (de) * 1999-09-02 2001-03-07 Bleckmann GmbH Rohrheizkörper mit NTC/PTC-Absicherung
EP1156704A1 (de) * 2000-05-17 2001-11-21 Acova Tauchheizkörper formende Vorrichtung zur Verwendung insbesondere in Heizkörpern von Heisswasserkreislaufheizungen
EP1278400A2 (de) 2001-07-20 2003-01-22 Jedac Heizelement
DE10209905A1 (de) 2002-03-07 2003-09-18 Stiebel Eltron Gmbh & Co Kg Elektrisches Heizgerät, insbesondere Durchlauferhitzer
WO2003100326A1 (en) * 2002-05-24 2003-12-04 Irca S.P.A. Control arrangement for heating devices

Cited By (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP2000747A3 (de) * 2007-06-08 2009-07-08 José Romero Pérez Modularer elektrischer Heizkörper
FR2932551A1 (fr) * 2008-06-11 2009-12-18 Atlantic Industrie Sas Radiateur a fluide caloporteur a lames chauffantes et son procede de fabrication.
FR2945107A1 (fr) * 2009-05-04 2010-11-05 Atlantic Industrie Sas Radiateur electrique a fluide caloporteur forme d'elements modulaires moules
EP2251612A1 (de) * 2009-05-04 2010-11-17 Atlantic Industrie Elektrisches Heizgerät mit Wärmeübertragungsflüssigkeit, das aus gegossenen Modulelementen besteht
ITVI20120103A1 (it) * 2012-05-02 2013-11-03 Ht S P A Dispositivo riscaldante per fluidi
EP2661151A1 (de) * 2012-05-02 2013-11-06 HT S.p.A. Flüssigkeitsheizgerät
IT202200008582A1 (it) * 2022-04-29 2023-10-29 Ht S P A Dispositivo riscaldante per fluidi
EP4271128A1 (de) * 2022-04-29 2023-11-01 HT S.p.A. Heizvorrcihtung für fluide

Also Published As

Publication number Publication date
ITVI20030248A1 (it) 2005-06-10
EP1655546A3 (de) 2006-07-26

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