WO1997002516A1 - Heizgerät, insbesondere zur innenraumbeheizung eines kraftfahrzeuges - Google Patents
Heizgerät, insbesondere zur innenraumbeheizung eines kraftfahrzeuges Download PDFInfo
- Publication number
- WO1997002516A1 WO1997002516A1 PCT/DE1996/001225 DE9601225W WO9702516A1 WO 1997002516 A1 WO1997002516 A1 WO 1997002516A1 DE 9601225 W DE9601225 W DE 9601225W WO 9702516 A1 WO9702516 A1 WO 9702516A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- temperature
- hydraulic
- heat
- gas jacket
- temperature gradient
- Prior art date
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H1/2203—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners
- B60H1/2206—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant the heat being derived from burners controlling the operation of burners
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2228—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters
- B60H2001/2231—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters for proper or safe operation of the heater
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2228—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters
- B60H2001/224—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant controlling the operation of heaters automatic operation, e.g. control circuits or methods
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
- B60H1/00—Heating, cooling or ventilating [HVAC] devices
- B60H1/22—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant
- B60H2001/2246—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant obtaining information from a variable, e.g. by means of a sensor
- B60H2001/2256—Heating, cooling or ventilating [HVAC] devices the heat being derived otherwise than from the propulsion plant obtaining information from a variable, e.g. by means of a sensor related to the operation of the heater itself, e.g. flame detection or overheating
Definitions
- Heater in particular for heating the interior of a motor vehicle
- the invention relates to a heater, in particular for heating the interior of a motor vehicle
- a heat exchanger which transfers the heat of combustion to a hydraulic heat transfer medium, in particular water, which is pushed through by combustion gases on one side of a gas jacket and by the hydraulic heat transfer medium on the other side of the gas jacket,
- an overheating sensor which is - preferably on the hydraulic side - in direct heat-conducting contact with the gas jacket and which generates temperature-reproducing signals
- a signal evaluation which determines a temperature gradient from time-spaced temperature signals and stops the burner when a threshold value of the temperature gradient is exceeded.
- the monitoring of the temperature gradient offers the advantage that an operating state with a risk of overheating can be recognized very early, ie clearly before undesirably high temperatures occur. This is based on the fact that there is essentially a risk of overheating if the burner output is too high compared to the throughput of the hydraulic medium in the heat exchanger and accordingly a large temperature gradient, ie a rapid rise in temperature, occurs.
- the object of the invention is to determine the risk of heating particularly reliably or at an early stage.
- This object is achieved in that the signal evaluation operates depending on the temperature determined in each case with different threshold values of the temperature gradient.
- the invention is based on the general idea that a comparatively rapid rise in temperature without the risk of overheating can be permitted as long as the temperature level remains low and thus clearly below a dangerous temperature level.
- the temperature rise should be slowed down, since otherwise inadmissibly high temperatures could be reached or after the heater was switched off, overheating could still occur due to residual heat.
- the permissible temperature-dependent threshold value can be specified as a function of the temperature present when the burner is switched on.
- the signal evaluation samples the temperature at a high clock frequency and determines an average value of the temperature gradient for a time interval in each case in the past.
- this can be done in such a way that of the values of the temperature sampled with a high clock frequency, those values which are spaced in time by a predetermined interval which is long in comparison with the clock intervals are processed in the sense of forming a difference.
- the signal processing can work according to the invention in such a way that the burner is switched off if a temperature difference occurs between the sensors which exceeds a temperature-dependent threshold value.
- FIG. 1 shows a schematic sectional view of a heating device according to the invention
- 2 shows a diagram which shows typical temporal temperature profiles.
- a combustion chamber 1 which can be controlled or regulated by supplying fuel via a metering pump 2 and combustion air via a blower 3.
- a heat exchanger 4 Connected to the combustion chamber 1 is a heat exchanger 4, which has a gas space 5 through which the combustion gases emerging from the combustion chamber 1 flow, and a hydraulic space 6 which is penetrated by a hydraulic heat transfer medium, usually water, and which is opposite the gas space 5 by a gas jacket 7 and is closed to the outside by a water jacket 8.
- the combustion gases enter the gas space 5 via a flame tube 9 arranged on the output side of the combustion chamber 1 and are deflected at the closed end of the gas space 5 facing away from the combustion chamber 1, so that they are discharged to the outside via an exhaust gas line 10 and an exhaust gas silencer (not shown) can be after they have flowed along the wall of the gas jacket 7 with the transfer of heat to the hydraulic medium.
- the hydraulic chamber 6 is helically formed by the hydraulic heat transfer medium, which is guided through corresponding guide webs on the outside of the gas jacket 7, from an inlet 11 to an outlet 12 in a circular manner. flows through, which leads via one or more radiators 13 and / or via the cooling circuit of a motor vehicle engine.
- an overheating sensor 14 Arranged near the inlet 11 distant from the combustion chamber 1 is an overheating sensor 14 which is in direct heat-conducting contact with the gas jacket 7 and, for this purpose, is tensioned against the outside of the gas jacket 7 by means of suitable tensioning elements, e.g. springs, in order to ensure good heat transfer. Otherwise, the overheating sensor 14 is also washed around by the hydraulic heat transfer medium with which the overheating sensor 14 is also in heat-conducting contact.
- suitable tensioning elements e.g. springs
- a temperature sensor 15 is arranged near the outlet 12, which is spaced from the gas jacket 7 and can essentially only detect the temperature of the hydraulic heat transfer medium.
- the sensors 14 and 15 are connected to the input side of a signal evaluation 16 which is used to control the combustion process, i.e. serves to control the metering pump 2 and the blower 3.
- the signals from the temperature sensor 15 are primarily used to regulate the output of the heater.
- the signals from the overheating sensor 14 are used alone or in combination with the signals from the temperature sensor 15 to protect against overheating.
- the curves K, and K 2 show, by way of example, two desired temperature profiles on the overheating sensor 14 as a function of the time t.
- the firing operation of the heater is switched on at a relatively low temperature T, while in the case of curve K 2 the operation starts at a comparatively significantly higher temperature T 2 .
- a comparatively steeper maximum temperature rise ie a large temperature gradient over time, is permissible without the risk of overheating, while in the case of the higher starting temperature T 2 only a lower maximum temperature gradient is to occur.
- the maximum temperature gradients are illustrated by the slope of the straight line G.
- the signal evaluation 16 now detects the temperature signals of the overheating sensor 14 with a comparatively high clock frequency, ie successive measured temperature measurement values are only separated by a small time difference dt. All the measured values ascertained are stored for a respective longer time interval DT. The temperature difference between the most recent and the oldest measured value is then determined within this time interval DT. This temperature difference changes analogously to the respective temperature gradient.
- the measured value evaluation shown avoids, on the one hand, that any scatter or possible signal noise from the overheating sensor 14 can lead to larger errors in the determination of the temperature gradient. Since the temperature gradient determined in each case is clearly represented by the slope of a straight line Si, Sj, etc., which passes through two measuring points with a relatively large distance DT over time, slight changes in the measured values due to interference cannot lead to any noteworthy change in the slope of the straight line Si, Sj etc. lead.
- the signal evaluation 16 also takes into account maximum values of the temperature gradient which are dependent on the respective temperature level, i.e. the signal evaluation 16 "knows" that at a higher temperature level only comparatively small temperature gradients should occur, the respective operating state can be taken into account in the overheating protection and in particular at a low temperature level, if there may be a high heating requirement, a rapid temperature rise can be made possible .
- the signal evaluation can also evaluate the temperature differences between the sensors 14 and 15, with maximum differences depending on the respective temperature level also being permitted.
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Air-Conditioning For Vehicles (AREA)
- Control Of Combustion (AREA)
Abstract
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US08/945,971 US6006997A (en) | 1995-07-04 | 1996-07-02 | Heating appliance, in particular for heating a motor vehicle passenger compartment |
JP9504721A JPH10511199A (ja) | 1995-07-04 | 1996-07-02 | 特に自動車の室内暖房のための暖房器具 |
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19524260A DE19524260C5 (de) | 1995-07-04 | 1995-07-04 | Heizgerät, insbesondere zur Innenraumbeheizung eines Kraftfahrzeuges |
DE19524260.2 | 1995-07-04 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1997002516A1 true WO1997002516A1 (de) | 1997-01-23 |
Family
ID=7765932
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/DE1996/001225 WO1997002516A1 (de) | 1995-07-04 | 1996-07-02 | Heizgerät, insbesondere zur innenraumbeheizung eines kraftfahrzeuges |
Country Status (5)
Country | Link |
---|---|
US (1) | US6006997A (de) |
JP (1) | JPH10511199A (de) |
CZ (1) | CZ231597A3 (de) |
DE (1) | DE19524260C5 (de) |
WO (1) | WO1997002516A1 (de) |
Families Citing this family (18)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE19802906A1 (de) * | 1998-01-27 | 1999-07-29 | Eberspaecher J Gmbh & Co | Brennstoffbetriebenes Luftheizgerät |
DE19903305C5 (de) * | 1999-01-28 | 2012-01-26 | Webasto Ag | Verfahren zur Flammüberwachung in einem Fahrzeugheizgerät |
US6201222B1 (en) * | 1999-03-15 | 2001-03-13 | Whirlpool Corporation | Method and apparatus for preheating an oven |
DE10051867A1 (de) * | 2000-10-19 | 2002-04-25 | Eberspaecher J Gmbh & Co | Heizgerät, insbesondere Fahrzeugheizgerät, mit Temperaturfühler |
DE10063922C1 (de) * | 2000-12-20 | 2002-07-18 | Webasto Thermosysteme Gmbh | Heizgerät, insbesondere Zusatzheizgerät für ein Fahrzeug |
DE10209519B4 (de) * | 2001-06-18 | 2007-04-05 | Webasto Ag | Heizsystem und Verfahren zum Beeinflussen von Luftströmungen in einem Heizsystem |
DE10130810A1 (de) * | 2001-06-26 | 2003-01-09 | Eberspaecher J Gmbh & Co | Verfahren zur Überhitzungserkennung bei einer Heizeinrichtung |
DE10133999A1 (de) * | 2001-07-12 | 2003-02-06 | Eberspaecher J Gmbh & Co | Verfahren zum Betreiben einer Heizeinrichtung und Heizeinrichtung |
US6766962B2 (en) * | 2002-07-15 | 2004-07-27 | Teleflex Canada Limited Partnership | Temperature maintaining apparatus and temperature control apparatus and method therefor |
DE10316194B4 (de) * | 2003-04-09 | 2012-10-11 | Webasto Ag | Luftheizgerät mit einer Vorrichtung zur Flammüberwachung |
JP4127230B2 (ja) * | 2004-03-26 | 2008-07-30 | 株式会社デンソー | 車両用空調装置 |
DE102005050862B3 (de) * | 2005-10-24 | 2007-05-03 | Webasto Ag | Verfahren zum Steuern eines motorunabhängigen Heizgeräts, Steuereinrichtung für ein motorunabhängiges Heizgerät, Heizgerät und Heizsystem |
DE102006047990B4 (de) * | 2006-10-10 | 2008-12-18 | Webasto Ag | Regelung einer Heizleistung eines Heizgeräts |
DE102007022938A1 (de) * | 2007-05-16 | 2008-11-20 | J. Eberspächer GmbH & Co. KG | Verfahren zur Flammüberwachung bei einem brennstoffbetriebenen Heizgerät |
DE102011075922A1 (de) * | 2011-05-16 | 2012-11-22 | J. Eberspächer GmbH & Co. KG | Verfahren zum Betreiben eines Heizsystems in einem Fahrzeug |
DE102012220792A1 (de) * | 2012-11-14 | 2014-05-15 | Eberspächer Climate Control Systems GmbH & Co. KG | Wärmetauscheranordnung, insbesondere für ein Fahrzeugheizgerät |
JP6383536B2 (ja) * | 2013-12-09 | 2018-08-29 | カルソニックカンセイ株式会社 | 車両空調用安全装置、及びその制御方法 |
US11319916B2 (en) | 2016-03-30 | 2022-05-03 | Marine Canada Acquisition Inc. | Vehicle heater and controls therefor |
Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
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DE3517953A1 (de) * | 1985-05-18 | 1986-11-20 | Webasto-Werk W. Baier GmbH & Co, 8035 Gauting | Verfahren und schaltanordnung zum regeln der heizleistung einer heizeinrichtung |
EP0267789A2 (de) * | 1986-11-13 | 1988-05-18 | Isuzu Motors Limited | Heizungsvorrichtung für Kraftfahrzeuge |
EP0346829A1 (de) * | 1988-06-15 | 1989-12-20 | Firma J. Eberspächer | In mehreren Leistungsstufen betreibbares Heizgerät für Kraftfahrzeuge |
EP0380369A1 (de) * | 1989-01-26 | 1990-08-01 | Otter Controls Limited | Steuerung für elektrisch versorgte Heizelemente |
GB2230623A (en) * | 1989-04-19 | 1990-10-24 | Baxi Partnership Ltd | Fuel rate control for heating appliance |
DE4221715A1 (de) * | 1991-07-17 | 1993-01-21 | Landis & Gyr Betriebs Ag | Verfahren zur regelung eines heizkessels mit einem nicht modulierenden brenner und vorrichtung zur durchfuehrung des verfahrens |
DE4446829A1 (de) * | 1993-12-31 | 1995-07-06 | Eberspaecher J | Fahrzeugheizgerät mit Überhitzungs-Überwachungseinrichtung |
Family Cites Families (9)
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DE3031410C2 (de) * | 1980-08-20 | 1985-01-03 | Webasto-Werk W. Baier GmbH & Co, 8035 Gauting | Steuergerät für Heizvorrichtungen |
DE3337601A1 (de) * | 1983-10-15 | 1985-04-25 | Webasto-Werk W. Baier GmbH & Co, 8035 Gauting | Heizgeraet, insbesondere fahrzeugheizgeraet |
JPS617481A (ja) * | 1984-06-22 | 1986-01-14 | Mitsubishi Precision Co Ltd | 水中連続音模擬装置 |
DE3505232C1 (de) * | 1985-02-15 | 1986-09-04 | Kurt Wolf & Co Kg, 7547 Wildbad | Anordnung zum Steuern und Regeln der Heizleistung in der Aufheizphase eines Dampfdruckkochgefaesses |
DE3517954A1 (de) * | 1985-05-18 | 1986-11-20 | Webasto-Werk W. Baier GmbH & Co, 8035 Gauting | Heizgeraet |
JPH01113814A (ja) * | 1987-10-28 | 1989-05-02 | Hitachi Ltd | 水位変化率計測修正方法 |
DE3839535A1 (de) * | 1988-11-23 | 1990-05-31 | Eberspaecher J | Heizgeraet fuer ein kraftfahrzeug |
JPH05149539A (ja) * | 1991-11-27 | 1993-06-15 | Sanyo Electric Co Ltd | 燃焼機の制御装置 |
DE9308954U1 (de) * | 1993-06-16 | 1993-08-19 | Webasto Thermosysteme Gmbh, 82131 Stockdorf | Steuersystem |
-
1995
- 1995-07-04 DE DE19524260A patent/DE19524260C5/de not_active Expired - Fee Related
-
1996
- 1996-07-02 JP JP9504721A patent/JPH10511199A/ja active Pending
- 1996-07-02 WO PCT/DE1996/001225 patent/WO1997002516A1/de not_active Application Discontinuation
- 1996-07-02 US US08/945,971 patent/US6006997A/en not_active Expired - Fee Related
- 1996-07-02 CZ CZ972315A patent/CZ231597A3/cs unknown
Patent Citations (7)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE3517953A1 (de) * | 1985-05-18 | 1986-11-20 | Webasto-Werk W. Baier GmbH & Co, 8035 Gauting | Verfahren und schaltanordnung zum regeln der heizleistung einer heizeinrichtung |
EP0267789A2 (de) * | 1986-11-13 | 1988-05-18 | Isuzu Motors Limited | Heizungsvorrichtung für Kraftfahrzeuge |
EP0346829A1 (de) * | 1988-06-15 | 1989-12-20 | Firma J. Eberspächer | In mehreren Leistungsstufen betreibbares Heizgerät für Kraftfahrzeuge |
EP0380369A1 (de) * | 1989-01-26 | 1990-08-01 | Otter Controls Limited | Steuerung für elektrisch versorgte Heizelemente |
GB2230623A (en) * | 1989-04-19 | 1990-10-24 | Baxi Partnership Ltd | Fuel rate control for heating appliance |
DE4221715A1 (de) * | 1991-07-17 | 1993-01-21 | Landis & Gyr Betriebs Ag | Verfahren zur regelung eines heizkessels mit einem nicht modulierenden brenner und vorrichtung zur durchfuehrung des verfahrens |
DE4446829A1 (de) * | 1993-12-31 | 1995-07-06 | Eberspaecher J | Fahrzeugheizgerät mit Überhitzungs-Überwachungseinrichtung |
Also Published As
Publication number | Publication date |
---|---|
DE19524260A1 (de) | 1997-01-09 |
CZ231597A3 (cs) | 1998-01-14 |
DE19524260C5 (de) | 2005-11-17 |
US6006997A (en) | 1999-12-28 |
DE19524260C2 (de) | 2002-08-22 |
JPH10511199A (ja) | 1998-10-27 |
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