EP0744582B1 - Dispositif de sécurité contre le refoulement des produits de combustion dans les chauffe-bains et chaudières à gaz - Google Patents
Dispositif de sécurité contre le refoulement des produits de combustion dans les chauffe-bains et chaudières à gaz Download PDFInfo
- Publication number
- EP0744582B1 EP0744582B1 EP96401115A EP96401115A EP0744582B1 EP 0744582 B1 EP0744582 B1 EP 0744582B1 EP 96401115 A EP96401115 A EP 96401115A EP 96401115 A EP96401115 A EP 96401115A EP 0744582 B1 EP0744582 B1 EP 0744582B1
- Authority
- EP
- European Patent Office
- Prior art keywords
- gas
- return
- safety device
- chimney
- heat
- 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
- 239000000567 combustion gas Substances 0.000 title 1
- 238000002485 combustion reaction Methods 0.000 claims abstract description 10
- 239000000779 smoke Substances 0.000 claims description 6
- 230000002159 abnormal effect Effects 0.000 description 3
- 239000003517 fume Substances 0.000 description 3
- 239000007789 gas Substances 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 230000001133 acceleration Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
Images
Classifications
-
- 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
- F24H9/2007—Arrangement or mounting of control or safety devices for water heaters
- F24H9/2035—Arrangement or mounting of control or safety devices for water heaters using fluid fuel
- F24H9/2042—Preventing or detecting the return of combustion gases
Definitions
- the invention relates to boilers and bath heaters gas comprising a reactive safety device the discharge of combustion products, and carries more precisely on a particular positioning of the temperature in the device.
- thermosensitive element for example a bulb or a switch
- the temperature differential must be between low power operation in abnormal discharge conditions and operation normal at high power, as wide as possible for compensate for the variation in ambient temperature in summer.
- thermosensitive element was placed on the right dawn or the left dawn of the draft hood, and thereby subjected to thermal radiation from the housing of this draft hood which brought it to temperatures close to those of the products of combustion during a backflow at small power. In summer, with ambient temperatures of around 30 ° C, these systems turn on unexpectedly security.
- the Applicant has developed a particular device, always using a temperature sensor capable of detecting overheating untimely but placed in a very particular taking advantage of the natural draft of fresh air in the device.
- a main object of the present invention therefore consists of a gas boiler or bath heater including a back-up safety device combustion products with one element thermosensitive placed in the delivery flow of combustion products at the draft hood of the appliance when insufficient draft or blockage of the duct smoke evacuation, the heat-sensitive element being positioned outside the draft hood, behind the device and at a hole provided on the face rear, device according to which the orifice is in the extension of a central blade arranged inside the draft-reducing box directly above the exhaust duct fumes.
- the central blade has the shape of a longitudinal cup whose concavity is turned towards the high.
- Figures 1 and 2 schematic sectional views vertical, respectively side and front, of the device in normal operation.
- Figure 3 a partial perspective view of the central part of the draft hood.
- Figures 4 and 5 are identical schematic views Figures 1 and 2, showing the device in case of abnormal operation.
- FIGS. 1 and 2 Partially shown in FIGS. 1 and 2, a boiler equipped with a burner 1, a heating body with hot skirt 2 surmounted by a draft hood 3 and a smoke evacuation duct 4.
- the draft hood in known manner has side air inlets 5 and deflectors 6 above these air inlets.
- the central blade 7 has the shape of a longitudinal cup whose concavity is turned towards the high.
- thermosensitive element 10 or sensor is mounted behind the boiler and outside the draft hood, at orifice 8.
- FIGS 1 and 2 show the boiler in normal running.
- the products of combustion follow a path materialized by arrows 11, between the heating body 2 and the duct 4, while a natural draft of fresh air is established in particular behind the device and penetrates inside through hole 8 as shown by the arrows 12.
- the thermo-element is outside the thermal radiation emitted by the draft hood 3. It is also in a large flow of fresh air thanks to at which it is kept at a temperature very close to the ambient temperature.
- the natural print behind the device is particularly due to the fact that the top of the boiler is warmer than the bottom.
- the element thermosensitive 10 is at the level of the central vane 7 allows it to be in an overpressure zone compared the housing of the draft hood in normal operation.
- the safety margin compared to room temperature variations is markedly increased which avoids untimely disjunction of the device.
- the heat-sensitive element thus placed behind the draft hood, can quickly turn the boiler on safety, whatever the power adjusted between a minimum power and maximum power. It avoids the use of two sensors or one sensor but two cutoff levels.
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)
- Feeding And Controlling Fuel (AREA)
- Regulation And Control Of Combustion (AREA)
- Control Of Combustion (AREA)
- Control For Baths (AREA)
- Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
Description
Claims (2)
- Chaudière ou chauffe-bains à gaz comprenant un dispositif de sécurité contre le refoulement des produits de combustion comportant un élément thermosensible (10) placé dans le flux de refoulement des produits de combustion au coupe-tirage de l'appareil lors d'un tirage insuffisant ou d'un bouchage du conduit d'évacuation des fumées, l'élément thermosensible (10) étant positionné en dehors du boítier coupe-tirage (3), derrière l'appareil et au niveau d'un orifice (8) prévu sur la face arrière (9), caractérisée en ce que l'orifice (8) se trouve dans le prolongement d'une aube centrale (7) disposée à l'intérieur du boítier coupe-tirage (3) à l'aplomb du conduit (4) d'évacuation des fumées.
- Chaudière ou chauffe-bains à gaz selon la revendication 1, caractérisés en ce que l'aube centrale (7) a la forme d'une coupelle longitudinale dont la concavité est tournée vers le haut.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
FR9506243A FR2734626B1 (fr) | 1995-05-26 | 1995-05-26 | Dispositif de securite contre le refoulement des produits de combustion dans les chauffe-bains et chaudieres a gaz |
FR9506243 | 1995-05-26 |
Publications (2)
Publication Number | Publication Date |
---|---|
EP0744582A1 EP0744582A1 (fr) | 1996-11-27 |
EP0744582B1 true EP0744582B1 (fr) | 2000-02-23 |
Family
ID=9479373
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP96401115A Expired - Lifetime EP0744582B1 (fr) | 1995-05-26 | 1996-05-23 | Dispositif de sécurité contre le refoulement des produits de combustion dans les chauffe-bains et chaudières à gaz |
Country Status (5)
Country | Link |
---|---|
EP (1) | EP0744582B1 (fr) |
AT (1) | ATE189922T1 (fr) |
DE (1) | DE69606735T2 (fr) |
ES (1) | ES2145397T3 (fr) |
FR (1) | FR2734626B1 (fr) |
Families Citing this family (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE29717072U1 (de) | 1997-09-24 | 1999-02-04 | Robert Bosch Gmbh, 70469 Stuttgart | Gasbeheizter Wassererhitzer mit Abgasüberwachungseinrichtung |
AT503132B1 (de) * | 2006-04-10 | 2007-08-15 | Vaillant Austria Gmbh | Verfahren zur überwachung einer strömungssicherung für heizgeräte |
Family Cites Families (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2143943B (en) * | 1983-06-30 | 1986-09-03 | Ti Domestic Appliances Ltd | Gas-fired appliances |
IT218780Z2 (it) * | 1988-08-08 | 1992-07-24 | Apparecchi Idrotermici Simonat | Cappa per la raccolta ed il convogliamento dei fumi da caldaie o simili provvista di dispositivo di sicurezza per le anomalie di scarico |
-
1995
- 1995-05-26 FR FR9506243A patent/FR2734626B1/fr not_active Expired - Fee Related
-
1996
- 1996-05-23 EP EP96401115A patent/EP0744582B1/fr not_active Expired - Lifetime
- 1996-05-23 ES ES96401115T patent/ES2145397T3/es not_active Expired - Lifetime
- 1996-05-23 AT AT96401115T patent/ATE189922T1/de not_active IP Right Cessation
- 1996-05-23 DE DE69606735T patent/DE69606735T2/de not_active Expired - Fee Related
Also Published As
Publication number | Publication date |
---|---|
FR2734626B1 (fr) | 1997-08-01 |
DE69606735T2 (de) | 2000-09-28 |
DE69606735D1 (de) | 2000-03-30 |
FR2734626A1 (fr) | 1996-11-29 |
EP0744582A1 (fr) | 1996-11-27 |
ES2145397T3 (es) | 2000-07-01 |
ATE189922T1 (de) | 2000-03-15 |
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