EP0288915B2 - Elektrischer Strahlungsheizkörper zur Beheizung einer Platte, insbesondere einer Glaskeramikplatte - Google Patents
Elektrischer Strahlungsheizkörper zur Beheizung einer Platte, insbesondere einer Glaskeramikplatte Download PDFInfo
- Publication number
- EP0288915B2 EP0288915B2 EP88106444A EP88106444A EP0288915B2 EP 0288915 B2 EP0288915 B2 EP 0288915B2 EP 88106444 A EP88106444 A EP 88106444A EP 88106444 A EP88106444 A EP 88106444A EP 0288915 B2 EP0288915 B2 EP 0288915B2
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature sensor
- plate
- heating element
- insulator
- radiant heating
- 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.)
- Expired - Lifetime
Links
- 238000010438 heat treatment Methods 0.000 title claims abstract description 36
- 239000002241 glass-ceramic Substances 0.000 title claims abstract description 13
- 125000006850 spacer group Chemical group 0.000 claims abstract description 19
- 239000012212 insulator Substances 0.000 claims abstract 8
- 238000005485 electric heating Methods 0.000 claims 1
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N silicon dioxide Inorganic materials O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000002184 metal Substances 0.000 description 6
- 239000011810 insulating material Substances 0.000 description 4
- 238000009413 insulation Methods 0.000 description 4
- 239000000919 ceramic Substances 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- 239000010453 quartz Substances 0.000 description 3
- 239000007787 solid Substances 0.000 description 3
- 208000031872 Body Remains Diseases 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 210000001015 abdomen Anatomy 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000015572 biosynthetic process Effects 0.000 description 1
- 239000013590 bulk material Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000010411 cooking Methods 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 229910021485 fumed silica Inorganic materials 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000001681 protective effect Effects 0.000 description 1
- 239000000523 sample Substances 0.000 description 1
- 230000011664 signaling Effects 0.000 description 1
- 238000007666 vacuum forming Methods 0.000 description 1
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
- H05B3/00—Ohmic-resistance heating
- H05B3/68—Heating arrangements specially adapted for cooking plates or analogous hot-plates
- H05B3/74—Non-metallic plates, e.g. vitroceramic, ceramic or glassceramic hobs, also including power or control circuits
- H05B3/748—Resistive heating elements, i.e. heating elements exposed to the air, e.g. coil wire heater
-
- 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
- H05B2213/00—Aspects relating both to resistive heating and to induction heating, covered by H05B3/00 and H05B6/00
- H05B2213/04—Heating plates with overheat protection means
Definitions
- the invention relates to an electric radiant heater for heating a plate, in particular a glass ceramic plate according to the generic term of claim 1.
- a plate in particular a glass ceramic plate according to the generic term of claim 1.
- Such radiant heater usually have a temperature sensor, the outer tube of an insulating Material, especially quartz or Quartz glass exists. It's either in that itself Expansion system of the sensor included, in which there is a pipe with a low coefficient of expansion forms in which a tension rod with higher Expansion coefficient is, or it is on a Expansion tube pushed on. This pipe will used to the required air or creepage distances in the space between heating resistors and the plate through which the temperature sensor runs through to ensure. It should be noted that glass ceramic plates at working temperature become electrically conductive, so that here the necessary Insulation distances are observed have to.
- quartz glass tubes are not only relatively expensive, but also fragile and require special Measures during their installation on the radiant heater.
- Such a temperature limiter with a quartz glass tube shows GB 2 181 896 B.
- the Sensor for example on the wire-shaped expansion element, that runs inside the quartz glass tube
- Spacers attached in the form of a ring. He's standing on the insulating body and can also on the glass ceramic plate support. In this respect, he could prevent himself from the insulating body the temperature sensor and this the Plate approaching.
- EP-A1-0 116 861, DE-A1-3 007 037 and WO-A1-85 / 01 412 are radiant heaters what radiation shields became known for those facing the heating resistors Side of the temperature sensor or between adjacent longitudinal sections of the temperature sensor exhibit.
- the object of the invention is to achieve this based on an electric radiant heater to create, with the self-insulation of the Temperature sensor can be dispensed with and this contributes to the fact that the insulating body remains flat.
- the sensor tube which should preferably be metallic can and possibly also be grounded, and the heating resistors ensured. It is determined in tests that the most essential danger that falling below a predetermined air gap could be caused by the fact that in continuous operation the insulating body, which can be two-layer can bulge upwards and thus the heating resistors brings the sensor tube closer. Through the Spacers this is surely avoided.
- the relatively stiff sensor tube ensures for the fact that the insulating body remains flat. The spacers do not need the temperature sensor constantly to lie on. Rather, it can be a certain Clearance should exist if ensured is that the spacer is the desired one Minimum clearance is still available. This Minimum distance can be, for example, 3 mm lie while including the total air distances the distance of the temperature sensor of the plate should be about 8 mm.
- the previous temperature sensors had to their sensitive quartz tubes very flexible be arranged and were preferably in after slots open at the top of an otherwise circumferential one Edge of the insulating body and a surrounding Carrier shell inserted and had in this Recesses game to avoid tension allow.
- the temperature sensor can now also be used and thus the whole controller is largely rigid by, for example, using his mostly slightly tapered free end in an after closed hole at the top of the carrier shell is inserted, while the switch side with a Bracket firmly on the carrier shell of the Radiant heater can be attached.
- the insulating edges can be closed at the top and provide more complete insulation.
- the temperature sensor can thus be in relatively narrow Holes are inserted in the edge and forms practical a seal to the outside.
- FIGS 1 to 3 show a radiant heater 11, for heating a glass ceramic plate 12 a hob or a stove is provided.
- the radiant heater is by not shown spring elements to the Pressed underside of the plate 12. It consists of a sheet metal carrier shell 13 with a bottom and a circumferential raised edge 14.
- an insulating body 15 with another Insulating layer 16 is underlaid.
- the insulating layer 16 consists of a highly insulating, but less firm Insulating material, for example a bulk material from microporous fumed silica.
- the insulating body 15 is also bowl-shaped with a relatively thin bottom 19 and one circumferential edge 17, which is slightly above protrudes the edge 14 of the sheet metal carrier shell and by the pressure springs on the underside 18 of the Plate 12 is pressed.
- the bottom 19 At the top of the bottom 19 are electrical Heating resistors 20 in the form of wire coils attached. happenss in the present example by partially pressing in the coils in the still moist molding of the insulating body 15.
- the bottom has a star shape Ribs 21, in which the heating coils a little further are indented while they are otherwise little penetrate into the insulating body. This creates a safe one that does not hinder the radiation Determination of the heating coils.
- it is also any other type of definition possible, for example by putty or the like, and there are others Insulating materials or configurations of the insulating body applicable in the context of the invention.
- a temperature sensor 23 of a temperature switch 24 which is a temperature limiter or a temperature protection switch is to ensure that the Bottom 18 of the plate 12 in its temperature a certain value remains limited because, for example Glass ceramic plates in the event of overheating suffer permanent damage.
- the switch head 25 of the temperature switch, 24 the at least a snap switch and possibly a second one Contact as a signal contact for signaling the Contains hot condition of the plate is outside of Insulating body firmly on an angular holder 26 attached, which is screwed to the carrier shell 13 is.
- the temperature sensor 23 is elongated and rod-shaped.
- a metal tube 27 in which a ceramic rod 28 lies (FIG. 3), a lower one than the metal pipe has thermal expansion coefficient, so that due to the difference in length in the switch head a snap switch can be operated.
- the outer tube 27 tapers and has an internal thread provided so that via an adjusting screw 30, on which the ceramic rod 28 is supported, the Switch can be adjusted.
- This structure of the Temperature switch is extremely simple and robust since the metal tube 27 is largely solid can be connected to the switch head 25 and also has no tendency to break.
- the temperature sensor can therefore be advantageously fixed at both ends be mounted, i.e.
- the temperature sensor runs through the room 22 through that it is a distance a from the Heating resistors and a distance b from the Plate. If you add the diameter d of the temperature sensor 23, the total distance results c from the bottom of the plate 12.
- the distance a may have a certain minimum dimension not less than, and also the total distance a + b must not fall below a certain level, to comply with the safety regulations. Nevertheless, the distance c should be as small as possible be on the one hand the heating as close as possible to get to the glass ceramic plate and on the other hand, the total height or depth of the radiant heater to keep it as low as possible and to this extent the insulation through the insulating layers 15, 16 to make it as big as possible.
- the variant shown in Fig. 4 has in remaining same construction a spacer 35a, the, like the spacer according to Figures 1 to 3, a contact surface 37 for the temperature sensor 23, but additionally has a contact surface 38 which the underside 18 of the plate 12 is opposite and can be supported on this.
- the one with the lead 35a formed spacers thereby about an L shape. It can also be U-shaped be.
- the temperature sensor can because it is not that additional quartz tube needed, with less Diameter d are produced, which in turn allows a reduction in height.
- the sensor tube can be grounded, so that even in the case of a belly of the glass ceramic plate it as a protective grounded component over the Heating is located and prevents, for example a "broken" cooking vessel under tension is set.
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Resistance Heating (AREA)
- Electric Stoves And Ranges (AREA)
- Control Of Resistance Heating (AREA)
- Surface Heating Bodies (AREA)
Description
- Fig. 1
- einen teilweise abgebrochenen Querschnitt durch einen Strahlungsheizkörper,
- Fig.2
- eine Draufsicht auf den Strahlungsheizkörper nach Fig. 1,
- Fig. 3
- einen Schnitt nach der Linie III in Fig. 1 und
- Fig. 4
- eine Variante, dargestellt entsprechend Fig. 3.
Claims (6)
- Elektrischer Strahlungsheizkörper (11) zur Beheizung einer Platte (12), insbesondere einer Glaskeramikkochplatte, bei dem auf einem Isolierkörper (15) im Abstand von der Platte (12) elektrische Heizwiderstände (20) angeordnet sind und bei dem zwischen dem Isolierkörper (15) und der Platte (12) ein stabförmiger Temperaturfühler (23) eines Temperaturschutzschalters (24) hindurch über die Heizzone des den mittleren Bereich bestimmenden Strahlungsheizkörpers ragt, wobei wenigstens ein nockenartig mit geringer Erstreckung in Längsrichtung des Temperaturfühlers (23) ausgebildeter und diesem im mittleren Bereich der Heizzone zugeordneter Abstandshalter (35) zur Einhaltung eines Mindestabstandes zwischen dem Isolierkörper (15) bzw. den darauf angeordneten Heizwiderständen (20) und dem Temperaturfühler (23) bzw. der Platte (12), sowie zur Sicherung gegen Aufwölben des Isolierkörpers (15) und zur Versteifung für den Strahlungsheizkörper (11) verwendet wird, dadurch gekennzeichnet, daß der Abstandshalter (35) im unbeheizten Bereich der Heizzone angeordnet, als aufwärts gerichteter Vorsprung des Isolierkörpers (15) einstückig mit dem Isolierkörper (15) ausgebildet ist und daß der mit einem metallischen Außenrohr ausgebildete Temperaturfühler (23) am jeweiligen Ende weitgehend starr gelagert und an einem Schalterkopf (25) des Temperaturschutzschalters (24) relativ fest eingespannt ist.
- Strahlungsheizkörper nach Anspruch 1 oder 2, dadurch gekennzeichnet, daß der Abstandshalter (35) eine Anlagefläche (37) für den Temperaturfühler (23) aufweist, wobei der Temperaturfühler (23) vorzugsweise ein freies Justierende (29) aufweist.
- Strahlungsheizkörper nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Abstandshalter eine Anlagefläche (38) für die Unterseite (18) der Platte (12) aufweist und eine Anlagefläche (37) für den Temperaturfühler hat.
- Strahlungsheizkörper nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß wenigstens zwei in Längsrichtung des Temperaturfühlers (23) mit Abstand voneinander angeordnete Abstandshalter (35) vorgesehen sind, von denen jeder in einem unbeheizten Bereich (36) liegt.
- Strahlungsheizkörper nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß der Abstandshalter (35) in einer Ansicht eine runde und/oder im Querschnitt durch den Isolierkörper (15) L- oder U-Form hat.
- Strahlungsheizkörper nach einem der vorhergehenden Ansprüche, dadurch gekennzeichnet, daß das freie Ende (29) des Temperaturfühlers (23) in einer zur Platte (12) hin geschlossenen Öffnung (31) eines Randes (14) einer Trägerschale (13) im wesentlichen in seitlicher Richtung unbeweglich geführt ist, wobei vorzugsweise auch eine entsprechende Öffnung (32) im Rand (17) des Isolierkörpers (15) zur Platte hin geschlossen ist.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE8706277U | 1987-05-01 | ||
DE8706277U DE8706277U1 (de) | 1987-05-01 | 1987-05-01 | Elektrischer Strahlungsheizkörper zur Beheizung einer Platte, insbesondere einer Glaskeramikplatte |
Publications (4)
Publication Number | Publication Date |
---|---|
EP0288915A2 EP0288915A2 (de) | 1988-11-02 |
EP0288915A3 EP0288915A3 (en) | 1989-01-04 |
EP0288915B1 EP0288915B1 (de) | 1994-06-22 |
EP0288915B2 true EP0288915B2 (de) | 1998-11-11 |
Family
ID=6807587
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP88106444A Expired - Lifetime EP0288915B2 (de) | 1987-05-01 | 1988-04-22 | Elektrischer Strahlungsheizkörper zur Beheizung einer Platte, insbesondere einer Glaskeramikplatte |
Country Status (7)
Country | Link |
---|---|
US (1) | US4845340A (de) |
EP (1) | EP0288915B2 (de) |
JP (1) | JP2700463B2 (de) |
AT (1) | ATE107831T1 (de) |
DE (2) | DE8706277U1 (de) |
ES (1) | ES2054727T5 (de) |
YU (1) | YU46335B (de) |
Families Citing this family (25)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE68923181T2 (de) * | 1988-05-27 | 1995-10-26 | Ceramaspeed Ltd., Droitwich, Worcestershire | Elektrische Strahlungsheizgeräte. |
US5177339A (en) * | 1988-05-27 | 1993-01-05 | Ceramaspeed Limited | Radiant electric heaters |
DE3828192A1 (de) * | 1988-08-19 | 1990-02-22 | Ego Elektro Blanc & Fischer | Strahlheizkoerper sowie verfahren und vorrichtung zu seiner herstellung |
US5128516A (en) * | 1989-02-17 | 1992-07-07 | Therm-O-Disc, Incorporated | Heating element control |
CA2007729A1 (en) * | 1989-02-17 | 1990-08-17 | Emil R. Plasko | Heating element control |
DE8914611U1 (de) * | 1989-12-12 | 1990-02-01 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Anschlußstein (Protektor) für eine Heizplatte eines Haushalt-Elektroherdes |
DE4022292A1 (de) * | 1990-07-15 | 1992-01-16 | Ego Elektro Blanc & Fischer | Elektrisches strahlungsheizelement |
DE4109569A1 (de) * | 1991-03-22 | 1992-09-24 | Buchtal Gmbh | Elektrische heizplatte |
DE9108012U1 (de) * | 1991-06-28 | 1991-09-05 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Netzspannungs-Berührungsschutz für Sensoren unter Glaskeramik-Kochflächen |
DE9108013U1 (de) * | 1991-06-28 | 1991-09-05 | Bosch-Siemens Hausgeräte GmbH, 8000 München | Netzspannungsisolierung für Sensoren unter Glaskeramik-Kochflächen |
GB2260442B (en) * | 1991-10-09 | 1995-06-07 | Ceramaspeed Ltd | Radiant heater incorporating a temperature control device |
DE9113992U1 (de) * | 1991-11-12 | 1992-01-02 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Strahlungs-Heizeinheit |
US5796075A (en) * | 1992-03-09 | 1998-08-18 | E.G.O. Elektro-Gerate Blanc Und Fisher Gmbh & Co. Kg | Heater, particularly for kitchen appliances |
US5256860A (en) * | 1993-01-22 | 1993-10-26 | Therm-O-Disc, Incorporated | Control for glass cooktops utilizing rod-shaped thermistor |
GB2278237B (en) * | 1993-05-21 | 1996-09-04 | Ceramaspeed Ltd | Thermal cut-out device |
DE19846512A1 (de) * | 1998-10-09 | 2000-04-13 | Ego Elektro Geraetebau Gmbh | Einbau eines Gehäuses einer Schalteinrichtung |
DE10006954A1 (de) * | 2000-02-16 | 2001-10-11 | Bsh Bosch Siemens Hausgeraete | Kochfeld mit Temperaturfühler |
EP1187512B1 (de) * | 2000-09-07 | 2004-11-10 | E.G.O. ELEKTRO-GERÄTEBAU GmbH | Strahlungsheizkörper zur Anordnung unter einem Kochfeld, insbesondere einer Glaskeramikplatte |
GB2372190B (en) * | 2000-12-16 | 2005-02-09 | Ceramaspeed Ltd | Cooking appliance with radiant electric heater |
EP1303169A1 (de) * | 2001-10-15 | 2003-04-16 | Heraeus Sensor-Nite GmbH | Temperatur-Sensor mit einem Sensor-Element sowie dessen Verwendung |
GB0301164D0 (en) * | 2003-01-18 | 2003-02-19 | Ceramaspeed Ltd | Temperature-responsive device |
GB0616353D0 (en) * | 2006-08-17 | 2006-09-27 | Ceramaspeed Ltd | Radiant electric heater |
TW201227761A (en) | 2010-12-28 | 2012-07-01 | Du Pont | Improved thick film resistive heater compositions comprising ag & ruo2, and methods of making same |
RU2643413C1 (ru) * | 2015-10-12 | 2018-02-01 | Конинклейке Филипс Н.В. | Блендер с температурным датчиком |
US11448402B2 (en) | 2016-12-07 | 2022-09-20 | Eika S. Coop | Radiant electric heater |
Family Cites Families (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US3710076A (en) * | 1972-02-17 | 1973-01-09 | J Frazier | Radiant surface-heater and temperature sensing assembly |
SE7806238L (sv) * | 1977-07-02 | 1979-01-03 | Fischer Karl | Elektriskt stralningsvermeelement, serskilt for glaskeramikkokhell |
GR69904B (de) * | 1979-10-27 | 1982-07-20 | Ego Elektro Blanc & Fischer | |
NZ196104A (en) * | 1980-02-01 | 1984-08-24 | Micropore International Ltd | Cooker plate with twin element:thermal cut-out for one |
DE3007037A1 (de) * | 1980-02-26 | 1981-09-03 | Ego Elektro Blanc & Fischer | Glaskeramik-kochgeraet |
DE3143692A1 (de) * | 1981-11-04 | 1983-05-11 | Ego Elektro Blanc & Fischer | Strahlheizkoerper zur beheizung von koch- und waermeflaechen |
US4508961A (en) * | 1982-03-02 | 1985-04-02 | Micropore International Limited | Electric radiant heater units for glass ceramic top cookers |
DE3302489A1 (de) * | 1983-01-26 | 1984-07-26 | Ego Elektro Blanc & Fischer | Elektrischer strahlheizkoerper zur beheizung von koch- oder waermeplatten, insbesondere glaskeramikplatten |
GB8324271D0 (en) * | 1983-09-10 | 1983-10-12 | Micropore International Ltd | Thermal cut-out device |
DE3410442A1 (de) * | 1983-09-17 | 1985-09-26 | Ego Elektro Blanc & Fischer | Temperaturfuehler, insbesondere fuer einen temperaturbegrenzer fuer eine glaskeramik-kocheinheit |
DE3519035A1 (de) * | 1985-05-25 | 1986-11-27 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Elektro-kochplatte |
DE8515560U1 (de) * | 1985-05-25 | 1985-08-29 | E.G.O. Elektro-Geräte Blanc u. Fischer, 7519 Oberderdingen | Kochstellen-Beheizung |
-
1987
- 1987-05-01 DE DE8706277U patent/DE8706277U1/de not_active Expired
-
1988
- 1988-04-22 ES ES88106444T patent/ES2054727T5/es not_active Expired - Lifetime
- 1988-04-22 DE DE3850297T patent/DE3850297D1/de not_active Expired - Fee Related
- 1988-04-22 EP EP88106444A patent/EP0288915B2/de not_active Expired - Lifetime
- 1988-04-22 AT AT88106444T patent/ATE107831T1/de not_active IP Right Cessation
- 1988-04-28 JP JP63104467A patent/JP2700463B2/ja not_active Expired - Fee Related
- 1988-04-29 US US07/188,262 patent/US4845340A/en not_active Expired - Lifetime
- 1988-05-04 YU YU87388A patent/YU46335B/sh unknown
Also Published As
Publication number | Publication date |
---|---|
EP0288915A3 (en) | 1989-01-04 |
YU46335B (sh) | 1993-05-28 |
ES2054727T5 (es) | 1999-02-01 |
ES2054727T3 (es) | 1994-08-16 |
EP0288915A2 (de) | 1988-11-02 |
EP0288915B1 (de) | 1994-06-22 |
US4845340A (en) | 1989-07-04 |
JPS63284788A (ja) | 1988-11-22 |
JP2700463B2 (ja) | 1998-01-21 |
DE8706277U1 (de) | 1987-06-25 |
YU87388A (en) | 1990-08-31 |
DE3850297D1 (de) | 1994-07-28 |
ATE107831T1 (de) | 1994-07-15 |
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