EP1251718A2 - Elektrische, explosionsgeschützte Heizung, insbesondere zur Innenraumbeheizung eines Instrumenten-Schutzschranks - Google Patents
Elektrische, explosionsgeschützte Heizung, insbesondere zur Innenraumbeheizung eines Instrumenten-Schutzschranks Download PDFInfo
- Publication number
- EP1251718A2 EP1251718A2 EP02003944A EP02003944A EP1251718A2 EP 1251718 A2 EP1251718 A2 EP 1251718A2 EP 02003944 A EP02003944 A EP 02003944A EP 02003944 A EP02003944 A EP 02003944A EP 1251718 A2 EP1251718 A2 EP 1251718A2
- Authority
- EP
- European Patent Office
- Prior art keywords
- temperature
- fuse
- heating
- explosion
- electrical
- 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
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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
- 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
Definitions
- the invention relates to an electrical, explosion-proof heater, in particular for interior heating of an instrument protection cabinet the preamble of claim 1.
- a known, generic heater (DE 38 14 145 C2) includes one Radiator with a receiving opening, a heating element and one in series switched overtemperature protection with a certain response temperature, wherein the heating element is inserted and potted in the receiving opening is.
- the heating element and the overtemperature protection connected in series are via electrical connection lines with a temperature controller connected to which an ambient temperature sensor as an actual value transmitter connected.
- Such heaters must be adapted to the specific conditions of use and dimensioned so that in a temperature-controlled operation by the explosion protection does not exceed the specified limit temperatures become.
- Boundary conditions are particularly in the case of overshoot temperature control without additional measures impermissible overheating on the heating cannot be excluded.
- the electrical heating circuit So far reversible switching elements are used as overtemperature fuses, which can be reset after a response in their safety function are. Hand-changeable fuses are also known.
- the object of the invention is to propose measures, with which such Complete replacement for the heater is usually avoidable.
- a fuse temperature sensor is in the area of the fuse arranged and poured into the receiving opening.
- the Fuse temperature sensor is with connection cables with the temperature controller connected. With this fuse temperature sensor the current Fuse temperature for comparison with one in the temperature controller determined switching temperature can be determined. This switching temperature is selected so that it is at a sufficient safety-temperature gap is below the response temperature of the fuse.
- the temperature controller is designed to operate in a temperature range below the specified and can be determined with the fuse temperature sensor Switching temperature in the usual way in a first control algorithm including the ambient temperature sensor as an actual value transmitter is working. Reaching and / or exceeding this predetermined changeover temperature is used by the temperature controller by evaluating the sensor values of the fuse temperature sensor, whereupon the temperature controller in switches another second control algorithm and to protect the The fuse regulates the heating power of the heating element. After one then falling below the changeover temperature, if necessary with a shortfall distance that can be specified in the control algorithm then the temperature controller switches back to the first control algorithm.
- the switchover temperature should be chosen so that even if the temperature is unfavorable Conditions, for example if the temperature control overshoots according to the first control algorithm during an initial heating phase with the temperature not yet settled, the response temperature the fuse due to the limitation of the heating power of the heating element is certainly not achieved.
- the arrangement according to the invention can preferably in a radiator known per se can be installed, the elongated Body with an axial receiving space and radially protruding heating fins is trained.
- Such a radiator according to claim 3 is preferred for good heat conduction made of metal. To do this, it is known to the radiator as a whole to produce as a cast part or as described in DE 38 14 145 C2, to produce the slats separately and to attach them to a base body.
- a cost-effective fuse temperature sensor NTC resistor can be used.
- the changeover temperature in the control circuit is sufficient to specify firmly.
- the switching temperature on Temperature controller is adjustable. Even with such an adjustable switchover temperature becomes the overriding safety function of the cast The fuse has not been touched.
- control algorithms can be predefined for normal applications become. According to claim 6, it is possible for further adjustments expedient, the control algorithm for the temperature range below the changeover temperature and / or the control algorithm for the range above the changeover temperature to make adjustable.
- This heater comprises a radiator 2 with a Receiving opening 3, with the radiator 2 as an elongated body an axial receiving space as a receiving space opening and with radially protruding Heating fins 4 is formed.
- the radiator 2 can be cast from metal, for example.
- the electrical, explosion-proof heater 1 further includes a heating element 5 and a series-connected fuse as overtemperature protection 6 with a certain response temperature.
- the heating element 5 and the overtemperature fuse 6 are in the receiving opening 3 used and cast there by means of a casting compound 7.
- the single figure also shows that the heating element 5 with the overtemperature protection 6 connected in series via electrical Connection lines 8, 14 is connected to a temperature controller 9 which is also connected to an ambient temperature sensor 10 as an actual value transmitter is.
- the fuse temperature sensor 11 With the fuse temperature sensor 11, the current temperature of the Overtemperature fuse 6 for a comparison with a predetermined changeover temperature can be determined, the changeover temperature with a Safety temperature difference below the response temperature of the overtemperature protection 6 is set.
- the temperature controller 9 operates in a temperature range below predetermined and determinable with the fuse temperature sensor 11 Switching temperature in the usual way in a control loop with inclusion of the ambient temperature sensor 10 as an actual value transmitter, the temperature controller 9 when the switching temperature is reached and / or exceeded Taking into account the sensor values of the fuse temperature sensor 11 in switches another control algorithm and to protect the overtemperature protection 6 regulates the heating power of the heating element 5.
- the changeover temperature at the temperature controller 9 is adjustable. It can also be provided that the control algorithm for the temperature range below the changeover temperature and / or the Control algorithm for a range above the changeover temperature on the temperature controller 9 can be set separately.
Landscapes
- Control Of Resistance Heating (AREA)
- Control Of Temperature (AREA)
Abstract
Description
Claims (6)
- Elektrische, explosionsgeschützte Heizung, insbesondere zur Innenraumbeheizung eines Instrumenten-Schutzschranks,
mit einem Heizkörper mit einer Aufnahmeöffnung,
mit einem Heizelement und einer in Reihe geschalteten Schmelzsicherung als Übertemperatursicherung mit einer bestimmten Ansprechtemperatur, wobei
das Heizelement und die Übertemperatursicherung in die Aufnahmeöffnung eingesetzt und dort vergossen sind, und
das Heizelement mit der in Reihe geschalteten Schmelzsicherung über elektrische Anschlussleitungen mit einem Temperaturregler verbunden sind, an den zudem ein Umgebungs-Temperaturfühler als Istwertgeber angeschlossen ist,
dadurch gekennzeichnet, dass im Bereich der Schmelzsicherung (6) ein Sicherungs-Temperaturfühler (11) angeordnet und mit in die Aufnahmeöffnung (3) eingegossen ist, der mit Anschlussleitungen (12, 13) mit dem Temperaturregler (9) verbunden ist dergestalt,
dass mit dem Sicherungs-Temperaturfühler (11) die aktuelle Temperatur der Schmelzsicherung (6) für einen Vergleich mit einer Umschalttemperatur ermittelbar ist und die Umschalttemperatur mit einem Sicherheits-Temperaturabstand unterhalb der Ansprechtemperatur der Schmelzsicherung (6) festgelegt ist, und
dass der Temperaturregler (9)in einem Temperaturbereich unterhalb der vorgegebenen und mit dem Sicherungs-Temperaturfühler (11) ermittelbaren Umschalttemperatur in üblicher Weise in einem Regelkreis unter Einbeziehung des Umgebungs-Temperaturfühlers (10) als Istwertgeber arbeitet und der Temperaturregler (9) bei Erreichen und/oder Überschreiten der Umschalttemperatur unter Berücksichtigung der Fühlerwerte des Sicherungs-Temperaturfühlers (11) in einen anderen Regelalgorithmus umschaltet, und zum Schutz der Schmelzsicherung (6) die Heizleistung des Heizelements (5) abregelt. - Elektrische, explosionsgeschützte Heizung nach Anspruch 1, dadurch gekennzeichnet, dass der Heizkörper (2) ein langgestreckter Körper mit einem axialen Aufnahmeraum (3) und radial abstehenden Heizlamellen (4) ist.
- Elektrische, explosionsgeschützte Heizung nach Anspruch 1 oder 2, dadurch gekennzeichnet, dass der Heizkörper (2) aus Metall gegossen ist.
- Elektrische, explosionsgeschützte Heizung nach einem der Ansprüche 1 bis 3, dadurch gekennzeichnet, dass der Sicherungs-Temperaturfühler (11) ein NTC-Widerstand ist.
- Elektrische, explosionsgeschützte Heizung nach einem der Ansprüche 1 bis 4, dadurch gekennzeichnet, dass die Umschalttemperatur am Temperaturregler (9) einstellbar ist.
- Elektrische, explosionsgeschützte Heizung nach einem der Ansprüche 1 bis 5, dadurch gekennzeichnet, dass der Regelalgorithmus für den Temperaturbereich unter der Umschalttemperatur und/oder der Regelalgorithmus für den Bereich über der Umschalttemperatur am Temperaturregler (9) getrennt einstellbar sind.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE10118922A DE10118922C1 (de) | 2001-04-18 | 2001-04-18 | Verfahren zur Sicherung und Regelung einer elektrischen, explosionsgeschützten Heizung und Vorrichtung zur Durchführung des Verfahrens |
DE10118922 | 2001-04-18 |
Publications (3)
Publication Number | Publication Date |
---|---|
EP1251718A2 true EP1251718A2 (de) | 2002-10-23 |
EP1251718A3 EP1251718A3 (de) | 2006-09-20 |
EP1251718B1 EP1251718B1 (de) | 2008-04-02 |
Family
ID=7681800
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP02003944A Expired - Lifetime EP1251718B1 (de) | 2001-04-18 | 2002-02-22 | Elektrische, explosionsgeschützte Heizung, insbesondere zur Innenraumbeheizung eines Instrumenten-Schutzschranks |
Country Status (3)
Country | Link |
---|---|
US (1) | US6720535B2 (de) |
EP (1) | EP1251718B1 (de) |
DE (2) | DE10118922C1 (de) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111600222A (zh) * | 2020-06-16 | 2020-08-28 | 河南里程碑科技有限公司 | 高效散热型配电自动化监控终端 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN104994603A (zh) * | 2015-07-16 | 2015-10-21 | 广东志高空调有限公司 | 一种电加热保护系统 |
DE102022102836A1 (de) | 2022-02-08 | 2023-08-10 | Turck Holding Gmbh | Vorrichtung und Verfahren zur Überwachung eines Sensors |
CN115628322B (zh) * | 2022-10-26 | 2023-05-16 | 南京市锅炉压力容器检验研究院 | 一种易熔合金塞的智能控制方法 |
Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3814145C2 (de) | 1988-04-27 | 1998-07-23 | Hess Joachim | Vorrichtung zum Zuführen oder Abführen von Wärme |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4075678A (en) * | 1976-02-13 | 1978-02-21 | American Thermostat Corporation | Fail safe circuit for heat generating device |
DE3633682A1 (de) * | 1986-10-03 | 1988-04-14 | Hess Joachim | Heizblock zur beheizung von ventilbloecken und messgeraeten |
DE4344341A1 (de) * | 1993-12-23 | 1995-07-06 | Elpag Ag Chur | Rohrheizkörper mit Überlastsicherung und Temperaturfühler |
JPH0851722A (ja) * | 1994-08-08 | 1996-02-20 | Canon Inc | ヒータの通電制御装置 |
JPH1062268A (ja) * | 1996-08-26 | 1998-03-06 | Yutaka Denshi Kk | 観賞魚用温水ヒーター |
JP2000010435A (ja) * | 1998-06-17 | 2000-01-14 | Canon Inc | 加熱装置、加熱定着装置及び画像形成装置 |
DE19941901A1 (de) | 1999-09-02 | 2001-03-29 | Bleckmann Gmbh Lamprechtshause | Rohrheizkörper mit NTC/PTC-Absicherung |
DE19941961B4 (de) * | 1999-09-03 | 2008-10-23 | Volkswagen Ag | Navigationssystem |
-
2001
- 2001-04-18 DE DE10118922A patent/DE10118922C1/de not_active Expired - Lifetime
-
2002
- 2002-02-22 DE DE50211999T patent/DE50211999D1/de not_active Expired - Lifetime
- 2002-02-22 EP EP02003944A patent/EP1251718B1/de not_active Expired - Lifetime
- 2002-04-18 US US10/125,274 patent/US6720535B2/en not_active Expired - Lifetime
Patent Citations (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3814145C2 (de) | 1988-04-27 | 1998-07-23 | Hess Joachim | Vorrichtung zum Zuführen oder Abführen von Wärme |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111600222A (zh) * | 2020-06-16 | 2020-08-28 | 河南里程碑科技有限公司 | 高效散热型配电自动化监控终端 |
CN111600222B (zh) * | 2020-06-16 | 2022-03-29 | 河南里程碑科技有限公司 | 高效散热型配电自动化监控终端 |
Also Published As
Publication number | Publication date |
---|---|
US6720535B2 (en) | 2004-04-13 |
EP1251718A3 (de) | 2006-09-20 |
EP1251718B1 (de) | 2008-04-02 |
DE10118922C1 (de) | 2003-04-30 |
US20020158062A1 (en) | 2002-10-31 |
DE50211999D1 (de) | 2008-05-15 |
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