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)

Applications Claiming Priority (4)

Publications (1)

Family

ID=26222067

Family Applications (1)

Country Status (4)

Families Citing this family (5)

Citations (5)

• 1981
  • 1981-11-06 DE DE8181401769T patent/DE3165113D1/de not_active Expired
  • 1981-11-06 EP EP81401769A patent/EP0052055B1/fr not_active Expired
  • 1981-11-06 JP JP56503548A patent/JPS6367113B2/ja not_active Expired
  • 1981-11-06 WO PCT/FR1981/000142 patent/WO1982001764A1/fr unknown

Patent Citations (5)

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