EP1278400A2 - Elément chauffant - Google Patents
Elément chauffant Download PDFInfo
- Publication number
- EP1278400A2 EP1278400A2 EP02291837A EP02291837A EP1278400A2 EP 1278400 A2 EP1278400 A2 EP 1278400A2 EP 02291837 A EP02291837 A EP 02291837A EP 02291837 A EP02291837 A EP 02291837A EP 1278400 A2 EP1278400 A2 EP 1278400A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- power switch
- envelope
- heating element
- element according
- sole
- 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
Images
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
- 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
- H05B1/0275—Heating of spaces, e.g. rooms, wardrobes
- H05B1/0283—For heating of fluids, e.g. water 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
- 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
-
- 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
-
- 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
- H05B3/78—Heating arrangements specially adapted for immersion heating
- H05B3/82—Fixedly-mounted immersion heaters
Definitions
- the present invention relates to a heating element intended for example to be used for heating of a heat transfer fluid, in particular water, contained in inside a sealed enclosure.
- a heat transfer fluid in particular water
- a heating element of this type generally comprises a resistive element which is arranged inside a tubular envelope of thermally conductive material and which is connected to a power circuit by through a power switch.
- heating elements to double envelope in which two tubular envelopes thermally conductive are arranged coaxially one in relation to the other.
- the single envelope or the outer shell of the heating element passes through the enclosure wall to be immersed in the fluid on most of its length with its end closed located on the interior side of the enclosure and its open end located on the outside to allow the electrical connection of the resistive element.
- the envelope When crossing the wall of the enclosure, the envelope is contained in a mounting flange which ensures faith its maintenance in position and the necessary tightness by compared to the wall of the enclosure.
- the mounting flange is made of material thermally conductive and present in its thickness a housing in which the switch is installed power in such a way that the mounting flange allows dissipation of the heat generated during power switch operation. This allows particularly effective way of limiting heating of the power switch or otherwise said, to provide cooling for the power switch.
- a heating element comprising an envelope receiving a heating resistance embedded in a insulating material and connected to a power source via a temperature-sensitive element placed in a envelope cavity to cut power to the heating resistance as a function of temperature.
- the heating element is arranged in such a way that it prevails the same temperature in the cavity at the sensitive element only in the surrounding insulating material resistance to control the power cut with good precision.
- it there is no question of cooling the sensitive element which on the contrary, must be subjected to the most possible close to that of the heating resistance.
- the teaching of this document cannot therefore be used to solve the problem posed above.
- a heating element comprising at least one thermally conductive tubular casing receiving at minus a resistive element connected to a power circuit comprising a power switch which is fixed in the envelope by means of heat exchange means between the power switch and the enclosure.
- the tubular casing ensures by contact with this heat transfer fluid heat dissipation function generated during the operation of the power.
- the binding of the envelope to the wall of the enclosure also contributes to heat dissipation via the speaker. This allows for an exchange surface relatively large for switch cooling power while maintaining a limited footprint. Efficient cooling of the power switch thus obtained increases the service life of this last.
- the tubular casing also provides Protection function of the power switch vis-à-vis external aggressions and facilitates insulation power switch in relation to the middle outside.
- the invention is here represented and described in connection with an individual heating element, intended for be mounted on an enclosure of fluid to be heated (not shown) using a mounting flange (itself not shown) designed to be screwed into a tapped hole provided in the wall of this enclosure.
- a mounting flange itself not shown
- Other types of equivalent mounting are of course conceivable.
- the heating element designated by the general reference 1 includes a resistor shielded electrical system that has a metal casing 2 inside which is arranged an element resistive 3 in the form here of a resistant wire arranged helically.
- the resistive element 3 extends in an electrically insulating refractory material such as powdered magnesia 4, compacted inside the metal casing 2.
- the resistive element has two ends 3a, 3b connected to electrical conductors 5, 6 which pass through a shutter element 7 to be connected to a power circuit.
- the shutter element 7 hermetically divides the metal casing 2 in two sections 2a, 2b, the resistive element 3 being contained in section 2a.
- the shutter element 7 is preferably made of a thermally insulating material.
- the power circuit is not fully visible in Figure 1 and only one power switch 8 is shown schematically in this figure.
- Power switch 8 is a connected triac to the rest of the power circuit by cables 9 and is mounted in section 2b of the metal casing 2.
- the power switch 8 is received in a cavity 10 which is formed in a sole 11 and which has a bottom 12 against which the power switch 8 is plate.
- the cavity 10 is filled with a hardened resin 13 electrically insulating which keeps it in position of the power switch 8 relative to the sole 11.
- the sole 11 is made of a thermally material conductor such as brass and present at opposite of cavity 10 one face 14 in cylinder portion of circular section having a radius substantially equal to the internal radius section 2b of the envelope 2.
- the face 14 of the sole 11 is in abutment against a portion of the internal surface of section 2b of envelope 2 via an electrically insulating layer 15.
- the insulating layer 15 can comprise one or two flexible mica sheets or an elastomer adapted by example based on silicone, possibly associated with a thermally conductive and electrically insulating grease. In the case where an isolated triac is used, the layer 15 is optional in the context of a simple isolation.
- An electrically insulating and hardened resin 16 fills section 2b of envelope 2 extending beyond of the shutter 7 and keeps the sub-assembly in position constituted by the power switch 8, the electrically insulating layer 15 and the sole 11. During of the manufacturing, we will insist on the quality of the contacts parts between them which must allow the establishment a heat exchange link between the power switch 8 and enclosure 2.
- the heat produced by the power switch 8 during operation is dissipated via the sole 11 by the casing 2 in contact with the heat transfer fluid to be heated.
- the flange is made of a thermally conductive material, part of heat produced by the power switch is also dissipated via the flange through the wall of the enclosure to which the heating element is attached.
- the power switch 8 is located in a medium (within cavity 10) which tends to be mainly subject to the temperature of the heat transfer fluid and not that of the resistive element 3, which favors cooling the power switch 8.
- a medium within cavity 10
- means of thermal insulation can be provided between cavity 10 and the area of the heating element immediately adjacent to the resistive element 3.
- the armored resistance is contained inside a second envelope 17 which extends coaxially with respect to the envelope 2 and which has an open end 17a and a closed end 17b.
- the envelope 17 is here made of a metal such than stainless steel but can also be made in any thermally conductive material.
- Envelope 17 is partially filled with electrically insulating refractory material such as magnesia 26, compacted inside the envelope 17, material in which the envelope 2 is included.
- a part of the envelope 17 adjacent to its open end 17a extends beyond the envelope 2 and receives the power switch 8 which, unlike the previous realization, is no longer placed in the envelope 2.
- the shutter element 7 is then adjacent to the open end of the casing 2 so that it closes it.
- the power switch 8 is mounted on a sole 11 having a cavity 10 having a bottom 12 and side walls electrically coated insulator 18. Electrically hardened resin 13 insulator fills the cavity 10 and holds the switch of power 8 in position.
- the sole 11 is as before made of a thermally conductive material, here brass, and has a face 14 opposite to the cavity 10 which has a cylindrical portion shape of circular section with a radius substantially equal to inner radius of the envelope 17.
- Maintaining the sole 11 in position in the corresponding part of the envelope 17 is provided by an electrically insulating hardened resin 23 which is contained in this part of the envelope.
- a groove 24 is formed axially in the face 14 of the sole 11.
- the assembly operations of the sub-assembly incorporating power switch 8 start with setting in place of the insulating layer 18 in the cavity 10 of such that this insulating layer covers the bottom 12 and the side walls of the cavity 10. Then, the switch of power 8 is placed in the cavity 10 before an electrically insulating resin 13 is introduced in the cavity 10.
- the resin 13 once hardened does not completely cover the power switch here 8 and mainly provides a holding function in position of the power switch 8 and of the layer insulator 18 in the cavity 10.
- the sole 11 is then mounted in the envelope 17 so that the face 14 is applied against the internal surface of the envelope 17 then the resin 23 is introduced into the envelope 17.
- the resin is introduced by the groove 4 so as to obtain filling the adjacent part of the envelope 17 at its end 17a similar to the filling obtained by source casting. This prevents bubbles air are trapped in the resin 23. The bleeding 24 thus facilitates the filling of the envelope. Resin 23 once cured ensures retention in the envelope 17 of the sole 11 and also performs a function electrical insulation.
- Tapping 24 has another advantage when the envelope 17 is obtained by winding a sheet on itself then welding the edges of it. Indeed, in this case the envelope 17 has an internal bulge 25 corresponding to the weld, which can be housed in the grooved 24 so that the internal bulge 25 does not prevent not obtaining a good adaptation of the face 14 with the internal surface of the envelope 17.
- the sole 11 has opposite of its face 14 in a portion of a cylinder of circular section, a flat face 19 on which the switch power 8 is fixed.
- An insulating layer 18 is interposed between face 19 and power switch 8.
- the the power switch 8 is fixed to the by means of a screw 20 which passes through a hole 21 made in the power switch 8 and fitted with a jacket shouldered 22 of electrically insulating material which, in cooperating with the insulating layer 18, electrically insulates the sole 11 and the screw 20 of the power switch 8.
Landscapes
- Resistance Heating (AREA)
Abstract
Description
- la figure 1 est une vue schématique partielle en coupe longitudinale d'un élément chauffant selon un premier mode de réalisation de l'invention,
- la figure 2 est une vue analogue à celle de la figure 1 d'un élément chauffant selon un deuxième mode de réalisation de l'invention,
- la figure 3 est une vue en coupe selon la ligne III-III de la figure 1 du sous-ensemble incorporant le commutateur de puissance,
- la figure 4 est une vue analogue à la figure 3 de ce sous-ensemble selon une première variante de réalisation,
- la figure 5 est une vue en élévation d'un sous-ensemble incorporant le commutateur de puissance, selon une deuxième variante de réalisation,
- la figure 6 est une vue en coupe selon la ligne V-V de la figure 5 de ce sous-ensemble.
Claims (8)
- Elément chauffant comprenant au moins une enveloppe tubulaire (2, 17) thermiquement conductrice, recevant au moins un élément résistif (3) relié à un circuit de puissance comportant un commutateur de puissance (8), caractérisé en ce que le commutateur de puissance est fixé dans l'enveloppe par l'intermédiaire de moyens d'échange thermique (11) entre le commutateur de puissance et l'enveloppe.
- Elément chauffant selon la revendication 1, caractérisé en ce que le commutateur de puissance (8) est appliqué contre une portion de surface interne de l'enveloppe (2, 17).
- Elément chauffant selon la revendication 2, caractérisé en ce que le commutateur de puissance (8) est monté sur une semelle (11) thermiquement conductrice et pourvue d'une face (14) de forme correspondant sensiblement à celle de la portion de surface interne de l'enveloppe (2, 17).
- Elément chauffant selon la revendication 3, caractérisé en ce que le commutateur de puissance (8) est reçu dans une cavité (10) de la semelle (11) qui comporte un fond (12) contre lequel le commutateur de puissance est plaqué et qui contient une résine (13) électriquement isolante dans laquelle est noyé le commutateur de puissance.
- Elément chauffant selon la revendication 3 ou la revendication 4, caractérisé en ce qu'au moins une couche électriquement isolante (18) est intercalée entre le commutateur de puissance (8) et la semelle (11).
- Elément chauffant selon l'une quelconque des revendications 3 à 5, caractérisé en ce qu'au moins une couche électriquement isolante (15) est intercalée entre la semelle (11) et la surface interne de l'enveloppe (2, 17).
- Elément chauffant selon l'une quelconque des revendications 3 à 6, caractérisé en ce que la semelle (11) est maintenue en position dans l'enveloppe (2, 17) par une résine (16,23) contenue dans celle-ci.
- Elément chauffant selon l'une quelconque des revendications 1 à 6, caractérisé en ce qu'il comporte deux enveloppes thermiquement conductrices (2, 17) qui sont disposées coaxialement l'une par rapport à l'autre, à savoir une enveloppe interne (2) et une enveloppe externe (17), et en ce que l'élément résistif (3) est disposé dans l'enveloppe interne et le commutateur de puissance (8) est disposé dans l'enveloppe externe.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR0109723 | 2001-07-20 | ||
FR0109723A FR2827735B1 (fr) | 2001-07-20 | 2001-07-20 | Element chauffant |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1278400A2 true EP1278400A2 (fr) | 2003-01-22 |
EP1278400A3 EP1278400A3 (fr) | 2003-03-19 |
EP1278400B1 EP1278400B1 (fr) | 2004-05-12 |
Family
ID=8865746
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02291837A Expired - Lifetime EP1278400B1 (fr) | 2001-07-20 | 2002-07-19 | Elément chauffant |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP1278400B1 (fr) |
AT (1) | ATE266938T1 (fr) |
DE (1) | DE60200470T2 (fr) |
ES (1) | ES2219625T3 (fr) |
FR (1) | FR2827735B1 (fr) |
Cited By (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1599080A3 (fr) * | 2004-05-18 | 2006-03-15 | Lacroix Electronique SRL | Pont thermique pour dissiper la chaleur d' un circuit de commande d' éléments radiants à fluide |
EP1655546A1 (fr) | 2003-12-09 | 2006-05-10 | BORELLI Luigi | Groupe chauffante pour éléments radiantes à fluide diathermique |
WO2010069355A1 (fr) * | 2008-12-19 | 2010-06-24 | Kautex Textron Cvs Limited | Réchauffeur de fluide pour véhicule |
ITVI20120103A1 (it) * | 2012-05-02 | 2013-11-03 | Ht S P A | Dispositivo riscaldante per fluidi |
FR3007828A1 (fr) * | 2013-07-01 | 2015-01-02 | Atlantic Industrie Sas | Element chauffant et chauffe-eau comportant un tel element chauffant |
FR3019630A1 (fr) * | 2014-04-03 | 2015-10-09 | Atlantic Industrie Sas | Bride chauffante et chauffe-eau equipe d'une telle bride |
IT202200008582A1 (it) * | 2022-04-29 | 2023-10-29 | Ht S P A | Dispositivo riscaldante per fluidi |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP2925085B1 (fr) * | 2014-03-27 | 2018-08-08 | Shengquan Liang | Réchauffeur d'eau chaude électrique et dispositif de chauffage utilisant un tel réchauffeur |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4480174A (en) * | 1981-09-11 | 1984-10-30 | Acra Electric Corporation | Thermostatically controlled electric compressor sump heater having self-contained thermostat |
EP0317435A1 (fr) * | 1987-11-19 | 1989-05-24 | David André | Elément électrique isolé chauffant à dispositif de sécurité détectant la défaillance de l'isolement électrique |
FR2801469A1 (fr) * | 1999-11-23 | 2001-05-25 | Turk & Hillinger Gmbh | Cartouche chauffante electrique |
-
2001
- 2001-07-20 FR FR0109723A patent/FR2827735B1/fr not_active Expired - Fee Related
-
2002
- 2002-07-19 AT AT02291837T patent/ATE266938T1/de not_active IP Right Cessation
- 2002-07-19 ES ES02291837T patent/ES2219625T3/es not_active Expired - Lifetime
- 2002-07-19 EP EP02291837A patent/EP1278400B1/fr not_active Expired - Lifetime
- 2002-07-19 DE DE60200470T patent/DE60200470T2/de not_active Expired - Lifetime
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4480174A (en) * | 1981-09-11 | 1984-10-30 | Acra Electric Corporation | Thermostatically controlled electric compressor sump heater having self-contained thermostat |
EP0317435A1 (fr) * | 1987-11-19 | 1989-05-24 | David André | Elément électrique isolé chauffant à dispositif de sécurité détectant la défaillance de l'isolement électrique |
FR2801469A1 (fr) * | 1999-11-23 | 2001-05-25 | Turk & Hillinger Gmbh | Cartouche chauffante electrique |
Cited By (10)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP1655546A1 (fr) | 2003-12-09 | 2006-05-10 | BORELLI Luigi | Groupe chauffante pour éléments radiantes à fluide diathermique |
EP1599080A3 (fr) * | 2004-05-18 | 2006-03-15 | Lacroix Electronique SRL | Pont thermique pour dissiper la chaleur d' un circuit de commande d' éléments radiants à fluide |
WO2010069355A1 (fr) * | 2008-12-19 | 2010-06-24 | Kautex Textron Cvs Limited | Réchauffeur de fluide pour véhicule |
CN102239368A (zh) * | 2008-12-19 | 2011-11-09 | 考泰斯德事隆Cvs有限公司 | 车辆液体加热器 |
ITVI20120103A1 (it) * | 2012-05-02 | 2013-11-03 | Ht S P A | Dispositivo riscaldante per fluidi |
EP2661151A1 (fr) * | 2012-05-02 | 2013-11-06 | HT S.p.A. | Appareil pour chauffer des fluides |
FR3007828A1 (fr) * | 2013-07-01 | 2015-01-02 | Atlantic Industrie Sas | Element chauffant et chauffe-eau comportant un tel element chauffant |
FR3019630A1 (fr) * | 2014-04-03 | 2015-10-09 | Atlantic Industrie Sas | Bride chauffante et chauffe-eau equipe d'une telle bride |
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 |
---|---|
DE60200470T2 (de) | 2005-05-25 |
FR2827735B1 (fr) | 2003-09-12 |
EP1278400A3 (fr) | 2003-03-19 |
ATE266938T1 (de) | 2004-05-15 |
DE60200470D1 (de) | 2004-06-17 |
ES2219625T3 (es) | 2004-12-01 |
EP1278400B1 (fr) | 2004-05-12 |
FR2827735A1 (fr) | 2003-01-24 |
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