WO1982001764A1 - Steamtight boiler with cylindrical exchanger - Google Patents
Steamtight boiler with cylindrical exchanger Download PDFInfo
- Publication number
- WO1982001764A1 WO1982001764A1 PCT/FR1981/000142 FR8100142W WO8201764A1 WO 1982001764 A1 WO1982001764 A1 WO 1982001764A1 FR 8100142 W FR8100142 W FR 8100142W WO 8201764 A1 WO8201764 A1 WO 8201764A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- air
- box
- chamber
- gas
- exchanger
- 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.)
- Ceased
Links
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
- F24H9/02—Casings; Cover lids; Ornamental panels
-
- 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
- F24H1/00—Water heaters, e.g. boilers, continuous-flow heaters or water-storage heaters
- F24H1/22—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating
- F24H1/40—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes
- F24H1/403—Water heaters other than continuous-flow or water-storage heaters, e.g. water heaters for central heating with water tube or tubes the water tubes being arranged in one or more circles around the burner
Definitions
- the invention relates to a gas-tight boiler of the type with a cylindrical exchanger, a sheet of water tubes surrounding a combustion chamber containing a blast air burner.
- a condensing boiler the combustion gases emitted by the radial burner,. pass through the water tubes and are collected in a sealed cylindrical shell which acts as an envelope for the exchanger and which collects the combustion products then flowing through an evacuation duct connected to this shell.
- the air-gas mixture is supplied to the burner from a mixing chamber supplied with gas by an injector, a fan being interposed between this chamber and the burner.
- This supply assembly is usually placed under the burner while the evacuation is ensured by the conduit disposed at the upper part of the exchanger, in engagement with the sealed cylindrical shell.
- This arrangement leads to constructions which are difficult to fit into a tight enclosure of limited size due to the existence on one side of a supply assembly with tubing and intake chamber, and on the other of a drain box.
- the subject of the invention is a single distribution box for the admission of combustion air coaxial between 1 ' evacuation of combustion gases, box which is applied to the sealed shell and which also serves as a support for the mixing chamber thus arranged vertically along the exchanger.
- the air box has a flat oblong shape, which receives the combustion air through an orifice concentric with the flue gas evacuation tube and the evacuation through a smaller diameter orifice provided on the case back on the other side and it fits on the shell tenchîté enveloping the combustion chamber, of which it constitutes the cover.
- the gas injection takes place horizontally at the base of an extension of the vertical air inlet chamber below the level of the exchanger, opposite d 'A venturi arranged horizontally debou ⁇ song at the base of this extension.
- FIGS. 1 and 3 shows an exchanger delimited by a cylindrical shell 1 which rests on a lower base 2 pierced with orifices suitable for the passage of conduits 3 and 4 for the arrival and departure of water , and the manifold 5 for admitting gas mixture to the radial burner 6 disposed in the center of the exchanger.
- the water tubes 7 which form a cylindrical sheet all around the burner 6, their shape and their spacing being determined to present large surfaces for exchange with the gases of combustion.
- Water circulates in the tubes of the sheet from a lower distributor ring 8 to an upper distributor ring 9 and vice versa, thanks to a set of baffles not shown located in the rings.
- the air-gas mixture coming from the mixing chamber is blown towards the burner by a fan 10 upstream of the intake manifold 5.
- a single distribution box or air box 11, shown in the upper part of FIGS. 1 and 3 and in FIG. 2, has a flat oblong shape and fits both on the upper edge of the shell 1, but also on the upper border
- a cover 15 in the combustion chamber is pierced with an orifice 15, in line with the burner 6, on which the exhaust gas discharge pipe 16 is fitted, which is arranged in a known manner inside and coaxially with another tube 17 of larger diameter p for the admission of fresh air.
- This assembly advantageously bent as shown in FIGS. 1 and 3, fits on the upper cover 18 of the air box 11 to which it is connected in a watertight manner by a clips. 19.
- the upper cover is provided with an orifice 20 of suitable diameter which is superimposed on the orifice 15. The air is therefore admitted into the air box 11 through the annular space delimited between the orifice 20 and the burnt gas evacuation pipe 16, and enters the air inlet chamber 12 through 1 orifice 14.
- the air inlet chamber 12 contains a venturi. This causes in the chamber 12 a suction effect which promotes mixing with the gas injected by the gas inlet tube 21 which passes tightly through the cover 18 and opens into the mixing chamber through the orifice 14 .
- the air inlet chamber 12 does not contain a venturi but is provided with an extension 22, the lower part of which is connected by a venturi 23 to fan 10; the neck 24 of the venturi is located substantially at the level of this extension 22.
- a gas injector 26 disposed horizontally at the height of the neck 24 of the venturi allows gas to be injected and mixed with the air in the venturi 23.
- the injector is supplied by the gas inlet tube 25, terminating in the lower part of the appliance.
- the invention is not limited to the exemplary embodiment shown but also encompasses all of the construction variants.
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)
- Gas Burners (AREA)
- Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
Abstract
Description
Chaudière étanche à échangeur cylindrique. Sealed boiler with cylindrical exchanger.
L'invention concerne une chaudière étanche à gaz du type à échan¬ geur cylindrique dont une nappe de tubes d'eau entoure une chambre de combustion renfermant un brûleur à air soufflé- Dans une forme connue de chaudière de ce type dite chaudière à condensation, les gaz de combustion émis par le brûleur radial , . traversent les tubes d'eau et sont recueillis dans une coquille cylindrique étanche qui sert d'enveloppe à l 'échangeur et qui recueille les produits de combustion s'écoulant ensuite par un conduit d'évacuation raccordé à cette coquille. L'alimentation du brûleur en mélange air-gaz s'effectue à partir d'une chambre de mélange alimentée en gaz par un injecteur, un ventilateur étant interposé entre cette chambre et le brûleur. -The invention relates to a gas-tight boiler of the type with a cylindrical exchanger, a sheet of water tubes surrounding a combustion chamber containing a blast air burner. In a known form of boiler of this type, called a condensing boiler, the combustion gases emitted by the radial burner,. pass through the water tubes and are collected in a sealed cylindrical shell which acts as an envelope for the exchanger and which collects the combustion products then flowing through an evacuation duct connected to this shell. The air-gas mixture is supplied to the burner from a mixing chamber supplied with gas by an injector, a fan being interposed between this chamber and the burner. -
Cet ensemble d'alimentation est habituellement disposé sous le brûleur tandis que l'évacuation est assurée par le conduit dis- posé à la partie haute de l'échangeur, en prise sur la coquille cylindrique étanche. Cette disposition conduit à des réalisations difficilement encastrables dans une enceinte étanche de dimension restreinte du fait de l'existence d'un côté d'un ensemble d'ali¬ mentation avec tubulure et chambre d'admission, et de l'autre d'un boîtier d'évacuation.This supply assembly is usually placed under the burner while the evacuation is ensured by the conduit disposed at the upper part of the exchanger, in engagement with the sealed cylindrical shell. This arrangement leads to constructions which are difficult to fit into a tight enclosure of limited size due to the existence on one side of a supply assembly with tubing and intake chamber, and on the other of a drain box.
Pour éviter cet inconvénient sur le plan di ensionnel en même temps que faciliter la fixation des divers éléments constitutifs de l'appareil l'invention a pour objet une unique boîte de dis¬ tribution pour l'admission d'air comburant coaxiale ent à 1 'é- vacuation des gaz de combustion, boîte qui s'applique sur la coquille étanche et qui sert en outre de support à la chambre de mélange ainsi disposée verticalement le long de l'échangeur.To avoid this drawback on the dimensional plane at the same time as facilitating the fixing of the various constituent elements of the apparatus, the subject of the invention is a single distribution box for the admission of combustion air coaxial between 1 ' evacuation of combustion gases, box which is applied to the sealed shell and which also serves as a support for the mixing chamber thus arranged vertically along the exchanger.
Selon une caractéristique principale de l'invention la boîte à air a une forme oblongue plate, qui reçoit l'air comburant par un orifice concentrique au tube d'évacuation des gaz brûlés et l'évacué par un orifice de plus petit diamètre prévu sur le fond du boîtier de l'autre côté et elle s'adapte sur la coquille d'é- tanchéîté enveloppant la chambre de combustion, dont elle cons¬ titue le couvercle.According to a main characteristic of the invention, the air box has a flat oblong shape, which receives the combustion air through an orifice concentric with the flue gas evacuation tube and the evacuation through a smaller diameter orifice provided on the case back on the other side and it fits on the shell tenchîté enveloping the combustion chamber, of which it constitutes the cover.
Selon une caractéristique particulière de l'invention, l'injec¬ tion de gaz s'effectue horizontalement à la base d'un prolongement de la chambre verticale d'arrivée d'air au-dessous du niveau de l'échangeur, en face d'un venturi disposé horizontalement débou¬ chant à la base de ce prolongement.According to a particular characteristic of the invention, the gas injection takes place horizontally at the base of an extension of the vertical air inlet chamber below the level of the exchanger, opposite d 'A venturi arranged horizontally debou¬ song at the base of this extension.
'D'autres caractéristiques particulières et avantages de l'inven¬ tion apparaîtront à la lecture de la description suivante d'une forme de réalisation en référence aux dessins annexés qui repré¬ sentent :'Other particular characteristics and advantages of the invention will appear on reading the following description of an embodiment with reference to the accompanying drawings which represent:
- figure 1 : une vue en coupe schématique éclatée de la chaudière,- Figure 1: an exploded schematic sectional view of the boiler,
- figure 2 : une vue en plan du dessus, - figure 3 : une variante de réalisation vue en coupe.- Figure 2: a top plan view, - Figure 3: an alternative embodiment seen in section.
La partie centrale des figures 1 et 3 montre un échangeur délimi¬ té par une coquille cylindrique 1 qui repose sur un socle infé¬ rieur 2 percé d'orifices appropriés pour le passage de conduits 3 et 4 d'arrivée et de départ d'eau, et de la tubulure 5 d'admis- si on du mélange gazeux au brûleur radial 6 disposé au centre de l'échangeur. A l'intérieur de la coquille sont disposés vertica¬ lement les tubes d'eau 7 qui forment une nappe cylindrique tout autour du brûleur 6, leur forme et leur espacement étant déter¬ minés pour présenter des surfaces d'échange importantes avec les gaz de combustion. L'eau circule dans les tubes de la nappe à partir d'un anneau répartiteur inférieur 8 vers un anneau réparti¬ teur supérieur 9 et inversement, grâce à un jeu de chicanes non représentées localisées dans les anneaux. Le mélange air-gaz provenant de la chambre de mélange est soufflé vers le brûleur par un ventilateur 10 en amont de la tubulure d'admission 5.The central part of FIGS. 1 and 3 shows an exchanger delimited by a cylindrical shell 1 which rests on a lower base 2 pierced with orifices suitable for the passage of conduits 3 and 4 for the arrival and departure of water , and the manifold 5 for admitting gas mixture to the radial burner 6 disposed in the center of the exchanger. Inside the shell are vertically arranged the water tubes 7 which form a cylindrical sheet all around the burner 6, their shape and their spacing being determined to present large surfaces for exchange with the gases of combustion. Water circulates in the tubes of the sheet from a lower distributor ring 8 to an upper distributor ring 9 and vice versa, thanks to a set of baffles not shown located in the rings. The air-gas mixture coming from the mixing chamber is blown towards the burner by a fan 10 upstream of the intake manifold 5.
Une unique boîte de distribution ou boîte à air 11, représentée à la partie supérieure des figures 1 et 3 et à la figure 2, a une forme oblongue plate et s'adapte à la fois sur la bordure supé¬ rieure de la coquille 1, mais aussi sur la bordure supérieureA single distribution box or air box 11, shown in the upper part of FIGS. 1 and 3 and in FIG. 2, has a flat oblong shape and fits both on the upper edge of the shell 1, but also on the upper border
-gjRE_-g j RE_
OMPI d'une chambre d'arrivée d'air 12 disposée parallèlement à la coquille en appui sur un prolongement du socle inférieur 2, et par conséquent formant un bloc rigide avec l'échangeur. Cette adaptation de la boîte à air 11 sur l'échangeur et la "chambre d'arrivée d'air se fait évidemment de façon étanche grâce à des joints d'étanchéitë non représentés, au niveau du grand diamètre de la boîte 11 qui coiffe la coquille cylindrique 1 et du petit diamètre de la boîte qui coiffe la chambre d'arrivée d'air 12. La face inférieure 13 de la boîte à air 11 forme à la fois, -le couvercle de la chambre de combustion en coiffant la coquille 1, -et Ventretoise qui maintient la partie supérieure de la chambre d'arrivée d'air du fait qu'elle est munie d'un orifice latéral 14 qui s'adapte à l'orifice supérieur de cette chambre. Ladite face inférieure 13 faisant office- de couvercle à la chambre de combustion est percée d'un orifice 15, au droit du brûleur 6, sur lequel vient s'adapter la tubulure 16 d'évacuation des gaz brûlés. Celle-ci est disposée de façon connue à l'intérieur et coaxialement à une autre tubulure 17 de plus grand diamètre pour l'admission d'air frais. Cet ensemble avantageusement coudé comme le montre les figures 1 et 3, s'adapte sur le capot supé¬ rieur 18 de la boîte à air 11 auquel il se raccorde de façon étan¬ che par un clips 19. A cet effet, le capot supérieur est muni d'un orifice 20 de diamètre approprié qui se superpose à l'orifi¬ ce 15. L'air est donc admis dans la boîte à air 11 par l'espace annulaire délimité entre l'orifice 20 et la tubulure d'évacuation des gaz brûlés 16, et pénètre dans la chambre d'arrivée d'air 12 par 1 Orifice 14.WIPO an air inlet chamber 12 disposed parallel to the shell bearing on an extension of the lower base 2, and consequently forming a rigid block with the exchanger. This adaptation of the air box 11 on the exchanger and the " air inlet chamber is obviously done in leaktight manner thanks to seals not shown, at the large diameter of the box 11 which covers the cylindrical shell 1 and the small diameter of the box which covers the air inlet chamber 12. The underside 13 of the air box 11 forms at the same time, the cover of the combustion chamber by covering the shell 1 , -and Ventretoise which maintains the upper part of the air inlet chamber because it is provided with a lateral orifice 14 which adapts to the upper orifice of this chamber. - a cover 15 in the combustion chamber is pierced with an orifice 15, in line with the burner 6, on which the exhaust gas discharge pipe 16 is fitted, which is arranged in a known manner inside and coaxially with another tube 17 of larger diameter p for the admission of fresh air. This assembly, advantageously bent as shown in FIGS. 1 and 3, fits on the upper cover 18 of the air box 11 to which it is connected in a watertight manner by a clips. 19. To this end, the upper cover is provided with an orifice 20 of suitable diameter which is superimposed on the orifice 15. The air is therefore admitted into the air box 11 through the annular space delimited between the orifice 20 and the burnt gas evacuation pipe 16, and enters the air inlet chamber 12 through 1 orifice 14.
Dans le cas représenté à la figure 1, la chambre d'arrivée d'air 12 renferme un venturi. Celui-ci provoque dans la chambre 12 un effet d'aspiration qui favorise le mélange avec le gaz injecté par le tube d'arrivée du gaz 21 qui traverse de façon étanche le capot 18 et débouche dans la chambre de mélange par l'orifice 14.In the case shown in Figure 1, the air inlet chamber 12 contains a venturi. This causes in the chamber 12 a suction effect which promotes mixing with the gas injected by the gas inlet tube 21 which passes tightly through the cover 18 and opens into the mixing chamber through the orifice 14 .
Selon la variante représentée à la figure 3, la chambre d'arrivée d'air 12 ne renferme pas de venturi mais est munie d'un prolonge- ment 22 dont Ta partie inférieure est raccordée par un venturi 23 au ventilateur 10 ; le col 24 du venturi se trouve sensiblement au niveau de ce prolongement 22. Un injecteur de gaz 26 disposé horizontalement à la hauteur du col 24 du venturi permet l'injec¬ tion de gaz et son mélange à l'air dans le venturi 23. L'injec- teur est alimenté par le tube d'arrivée de gaz 25, aboutissant à la partie inférieure de l'appareil.According to the variant shown in Figure 3, the air inlet chamber 12 does not contain a venturi but is provided with an extension 22, the lower part of which is connected by a venturi 23 to fan 10; the neck 24 of the venturi is located substantially at the level of this extension 22. A gas injector 26 disposed horizontally at the height of the neck 24 of the venturi allows gas to be injected and mixed with the air in the venturi 23. The injector is supplied by the gas inlet tube 25, terminating in the lower part of the appliance.
L'invention ne se limite pas à l'exemple de réalisation repré¬ senté mais en englobe aussi toutes les variantes constructîves. The invention is not limited to the exemplary embodiment shown but also encompasses all of the construction variants.
Claims
Applications Claiming Priority (4)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR8023787A FR2493968B1 (en) | 1980-11-07 | 1980-11-07 | WATERPROOF BOILER WITH CYLINDRICAL EXCHANGER |
| FR8023787801107 | 1980-11-07 | ||
| FR8119454 | 1981-10-16 | ||
| FR8119454A FR2514869B2 (en) | 1981-10-16 | 1981-10-16 | WATERPROOF BOILER WITH CYLINDRICAL EXCHANGER |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| WO1982001764A1 true WO1982001764A1 (en) | 1982-05-27 |
Family
ID=26222067
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| PCT/FR1981/000142 Ceased WO1982001764A1 (en) | 1980-11-07 | 1981-11-06 | Steamtight boiler with cylindrical exchanger |
Country Status (4)
| Country | Link |
|---|---|
| EP (1) | EP0052055B1 (en) |
| JP (1) | JPS6367113B2 (en) |
| DE (1) | DE3165113D1 (en) |
| WO (1) | WO1982001764A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2534005A1 (en) * | 1982-10-05 | 1984-04-06 | Sdecc | ARRANGEMENT OF A FORCE DRAIN GAS BOILER |
| JPH04119561U (en) * | 1991-04-12 | 1992-10-26 | ナシヨナル住宅産業株式会社 | face-to-face kitchen |
| FR2694388B1 (en) * | 1992-07-30 | 1994-10-14 | Sdecc | Heat exchanger with water tubes, especially for condensing boilers. |
| EP1058804B1 (en) * | 1998-02-24 | 2002-11-13 | Centre des Technologies du Gaz naturel | External gas-fired water/glycol heater |
| ITAN20130237A1 (en) * | 2013-12-10 | 2015-06-11 | Ariston Thermo Spa | COVER FOR CONDENSING BOILERS |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE571538C (en) * | 1930-08-19 | 1933-03-01 | Junkers & Co | Liquid heater |
| DE2100344A1 (en) * | 1970-01-08 | 1971-07-15 | Glow-Worm Ltd., Belper, Derby (Großbritannien) | Heat exchangers and water heaters made using such heat exchangers |
| US3823704A (en) * | 1973-02-14 | 1974-07-16 | Rheem International | Power burner application to fin tube heat exchanger |
| FR2238123A1 (en) * | 1973-07-17 | 1975-02-14 | Haller Meurer Werke Ag | |
| FR2452059A1 (en) * | 1979-03-21 | 1980-10-17 | Saunier Duval | DEVICE FOR EXHAUSTING BURNED GASES AND FOR SUPPLYING FRESH AIR FOR GAS WATERTIGHT APPLIANCES |
-
1981
- 1981-11-06 JP JP56503548A patent/JPS6367113B2/ja not_active Expired
- 1981-11-06 EP EP81401769A patent/EP0052055B1/en not_active Expired
- 1981-11-06 WO PCT/FR1981/000142 patent/WO1982001764A1/en not_active Ceased
- 1981-11-06 DE DE8181401769T patent/DE3165113D1/en not_active Expired
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE571538C (en) * | 1930-08-19 | 1933-03-01 | Junkers & Co | Liquid heater |
| DE2100344A1 (en) * | 1970-01-08 | 1971-07-15 | Glow-Worm Ltd., Belper, Derby (Großbritannien) | Heat exchangers and water heaters made using such heat exchangers |
| US3823704A (en) * | 1973-02-14 | 1974-07-16 | Rheem International | Power burner application to fin tube heat exchanger |
| FR2238123A1 (en) * | 1973-07-17 | 1975-02-14 | Haller Meurer Werke Ag | |
| FR2452059A1 (en) * | 1979-03-21 | 1980-10-17 | Saunier Duval | DEVICE FOR EXHAUSTING BURNED GASES AND FOR SUPPLYING FRESH AIR FOR GAS WATERTIGHT APPLIANCES |
Also Published As
| Publication number | Publication date |
|---|---|
| DE3165113D1 (en) | 1984-08-30 |
| EP0052055A1 (en) | 1982-05-19 |
| JPS57501972A (en) | 1982-11-04 |
| EP0052055B1 (en) | 1984-07-25 |
| JPS6367113B2 (en) | 1988-12-23 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO1982001764A1 (en) | Steamtight boiler with cylindrical exchanger | |
| FR2780770A1 (en) | RECOVERY DEVICE, RECOVERY APPARATUS FOR BURNER WITH RADIANT TUBE AND DEFLECTOR | |
| EP0105805B1 (en) | Air-tight heater assembly with forced draft | |
| FR2464437A1 (en) | BOILER OF WHICH THE BURNER IS FORMED BY A WALL OF THE MIXING CHAMBER | |
| FR2493968A1 (en) | Fuel and air supply for gas heated boiler - has top cover with air entry between tube and flue gas outlet | |
| FR2476808A1 (en) | HEAT EXCHANGER FORMING ANTI-DEFLAGRATION BARRIER FOR DOMESTIC CENTRAL HEATING BOILERS | |
| EP0051516B1 (en) | Tight chamber of a heat exchanger with a mantle consisting of straight water pipes arranged concentrically around a central burner | |
| EP0323502B1 (en) | Device forming a gas burner, in particular for heating appliance. | |
| FR2655711A1 (en) | Burner for a gaseous air-fuel mixture | |
| EP0663991B1 (en) | Waste incineration apparatus and plant | |
| EP2166285B1 (en) | Mischer für Kessel | |
| FR2519742A1 (en) | Central heating boiler with second burner - has flue gases led through secondary burner consisting of flue duct surrounded by ignition-point-reducing catalyst | |
| FR2583324A1 (en) | SOLDERING IRON | |
| FR2521269A1 (en) | Condensation boiler with liquid fuel burner - has circular tubular heat exchanger for water below combustion chamber | |
| FR2514869A2 (en) | Fuel and air supply for gas heated boiler - has top cover with air entry between tube and flue gas outlet | |
| FR2503332A1 (en) | DEVICE FOR POSITIONING A RADIAL BURNER FOR A CONDENSED BOILER | |
| FR2660050A1 (en) | WATERPROOF GAS-TYPE WALL-MOUNTED BOILER WITH FORCED AIR CIRCULATION FOR DOMESTIC USE. | |
| BE660278A (en) | ||
| CH217431A (en) | Wood gasifier. | |
| FR2780488A1 (en) | IMPROVEMENT TO COMBUSTION APPLIANCES COMPRISING SEVERAL FUEL TRANSPORT DUCTS | |
| CH182332A (en) | Oven for cooking. | |
| FR2689212A1 (en) | Gas burner with several combustion heads. | |
| BE538794A (en) | ||
| BE536336A (en) | ||
| FR2687458A1 (en) | Heat generator, in particular for a heat-transfer liquid |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| AK | Designated states |
Designated state(s): JP US |