US3921592A - Arrangement and mounting of the enclosure and combustion chamber of a forced-draft boiler - Google Patents

Arrangement and mounting of the enclosure and combustion chamber of a forced-draft boiler Download PDF

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Publication number
US3921592A
US3921592A US531888A US53188874A US3921592A US 3921592 A US3921592 A US 3921592A US 531888 A US531888 A US 531888A US 53188874 A US53188874 A US 53188874A US 3921592 A US3921592 A US 3921592A
Authority
US
United States
Prior art keywords
partition
enclosure
skirt
heat exchanger
shroud
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
Application number
US531888A
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English (en)
Inventor
Guy Edmond Calvin
Andre Marcel Costecalde
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Saunier Duval Eau Chaude Chauffage SDECC SA
Original Assignee
Saunier Duval SA
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Saunier Duval SA filed Critical Saunier Duval SA
Application granted granted Critical
Publication of US3921592A publication Critical patent/US3921592A/en
Assigned to SAUNIER DUVAL EAU CHAUDE CHAUFFAGE - S.D.E.C.C. reassignment SAUNIER DUVAL EAU CHAUDE CHAUFFAGE - S.D.E.C.C. CHANGE OF NAME (SEE DOCUMENT FOR DETAILS). EFFECTIVE ON 12/27/1979 Assignors: OFREVAL 54, AVENUE HOCHE 75008 PARIS, FRANCE
Assigned to OFREVAL reassignment OFREVAL ASSIGNMENT OF ASSIGNORS INTEREST. Assignors: SAUNIER, DUVAL
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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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
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1809—Arrangement or mounting of grates or heating means for water heaters
    • F24H9/1832—Arrangement or mounting of combustion heating means, e.g. grates or burners
    • F24H9/1845—Arrangement or mounting of combustion heating means, e.g. grates or burners using solid fuel
    • 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
    • F24H2203/00—** to be deleted **
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10—TECHNICAL SUBJECTS COVERED BY FORMER USPC
    • Y10S—TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y10S122/00—Liquid heaters and vaporizers
    • Y10S122/01—Air heater

Definitions

  • a U-shaped partition together with the upper portion of an overall enclosure, forms an air-tight compartment.
  • a burner rests in the lower portion of the U-shaped partition while a heat-exchanger bridges the upper portion of the U-shaped partition.
  • the heat exchanger includes a skirt which extends down into the lower portion of the partition, the forced-draft air flow causing inlet air to pass between the partition and the skirt.
  • the invention concerns an air-tight forced-draft boiler and relates more precisely to a new arrangement of the enclosure provided for the fresh air intake and flue gas exhaust.
  • Water-heaters or gas boilers are already known whose combustion chambers are connected to the atmosphere outside the room. These systesm are, in some cases, surrounded with an intermediate chamber for an air feed which envelops the combustion chamber in an air-tight manner.
  • the outer jacket of the system forms this air-tight intermediate chamber and it is through an orifice arranged in the back wall of said jacket that the fresh air is admitted, which air circulates in said chamber before passing to the burners in the combustion chamber, the flue gasses being exhausted from this combustion chamber by means of a hood, an exhaust fan, and an outlet tube.
  • the outlet tube is known to be advantageously concentric with the fresh air inlet tube.
  • the purpose of the invention is to remedy the abovecited difficulties inherent in known systems and hence proposes a particular arrangement of the tight enclosure characterized by the fact that a U-shaped partition composed of two vertical walls extended at the top by horizontal shoulders and a transverse bottom is applied to the sheet-metal which forms the back wall of the system thereby to provide, at the base of the air-tight enclosure, a chamber of smaller width than the upper part of said enclosure; it is also characterized by the fact that the horizontal shoulders which are provided at the upper part of the partition and are attached to the lateral walls of the system are traversed by the tubes feeding in the water and bringing it to the heating element.
  • a front wall, shaped like two superimposed rectangles, is provided in which the lower rectangle has a smaller width and conforms closely to the lateral borders of the partition.
  • the heating element is provided with a skirt in the form of a rectangular case which fits within the U-shaped partition with sufficient clearance for fresh air to pass between the skirt and the housing.
  • the transverse bottom of the housing is provided with a recess permitting introduction of an element supporting the burner which also serves as a passage for the tubes feeding gas to the burner and the pilot as well as the ignition and safety elements.
  • FIG. 1 is an exploded perspective view of the entire system
  • FIG. 2 is a schematic front view, where the wall has been removed.
  • the boiler enclosure shown comprises a back wall 5 provided with supports 2 for its attachment to the wall of the room whereon it is mounted, two lateral walls 3, whose upper parts are made of continuous sheet metal but whose lower parts have wide openings, and an upper lid 4. These four elements are welded together.
  • a U-shaped partition I obtained by stamping, is formed with a transverse bottom 10 and two vertical walls 11 ending in horizontal shoulders 12, the bent-up ends of which permit the housing to be mounted on lateral walls 3.
  • the partition 1 is thus mounted inside the enclosure such that the horizontal shoulders 12 are substantially at the level of the top of the openings provided in lateral walls 3.
  • Partition 1 which forms the bottom limit of the volume of the air-tight enclosure, also has lengthwise a small border or flange of folded sheet metal 14 and the transverse bottom is supplied toward the front with a V-shaped recess 15.
  • the base of the air-tight enclosure so made is thus a chamber whose width is smaller (limited by vertical walls 11) than the upper part whose width is limited by lateral walls 3.
  • a burner element 6, together with a pilot tube 7 and an ignition and safety device 8, is attached to a support 16, also V-shaped, so as to be easily placed in the bottom part of the enclosure, in the small width chamber, since said support 16 fits into recess 15 of transverse bottom 10. Air-tightness is ensured by a rubber gasket (not shown) which borders said support 16.
  • the gasket provides a sealed passage for the tubes feeding gas to the pilot and burner, for the usual high-voltage ignition wire of the pilot and for the connection of the usual flame control thermocouple.
  • shoulders 12 are supplied with apertures for passage of these principal pipes and with auxiliary apertures for passage of temperature sensors or overheating detectors if desired. All these apertures are sealed by appropriate sealing devices.
  • These tubes which thus pass outside vertical walls'll of the housing, are easily accessible through the apertures in the lateral walls and can thus be connected to the mechanisms (not shown) conveniently located in the lower part of the system under bottom 10 of the housing.
  • the heat-exchange element 9 is provided with a rectangular skirt comprising a removable front plate 22 and a corrugated sheet metal assembly 23 forming the back plate and two lateral plates.
  • the heat-exchange element is also provided with tabs 24 which bear on brackets mounted on the horizontal shoulders 12.
  • the lower part of the skirt covers burning element 6.
  • the inside of this skirt is supplied with a refractory lining for heat insulation thereof. It is kept apart from back wall 5 and vertical walls 11 of the housing by bosses (not represented) made when the walls are stamped.
  • the flue gas exhaust hood 25 rests on the upper part of heat exchange 9. It has the shape of a prism, one side of which is supplied with an aperture 26. On this aperture is mounted exhaust fan 29 whose outlet tube 30 passes concentrically through the larger diameter of air inlet orifice 31 provided in the back wall 5 of the system. Said orifice 31 also cooperates with a fresh air inlet tube 32 which connects the air-tight enclosure with the outside of the room.
  • a front wall 33 whose shape is as shown, i.e. with the upper part having the width of the overall enclosure and the lower part that of the lower part of the partition 1, is applied to the air-tight portion of the enclosure so formed.
  • a window 34 enables pilot? to be seen while bosses 35, obtained by stamping, keep removable front plate 22 at a certain distance from this front wall.
  • the entire lower part of the overall enclosure, under partition 1, serves to enclose the pump and the control mechanisms (not shown).
  • An easily dismountable outside facing covers the assembly.
  • FIG. 2 illustrates the air and flue gas paths in the system more clearly.
  • front wall 33 does not appear on this drawing: it is known to be applied tightly to the edges of the enclosure limited by lid 4, lateral walls 3, and partition 1, the contours of which it matches exactly.
  • Air and gas movement inside the enclosure is accomplished in a manner known of itself by fan 29.
  • the fresh air is admitted from the outside by aperture 31. It circulates in the direction indicated by the arrows to the base of the enclosure whereby it passes between the partition 1 and the skirt of the heat-exchange element, whereby the restricted space, delimited by the spacing bosses, causesmore rapid air flow which facilitates heat exchange.
  • the air passes under burner 6 and the flue gases collect in hood 25 and are exhausted by fan 29 through exhaust pipe 30.
  • FIG. 2 shows a surge tank 36 which is placed behind the system between back 5 and the wall of the room on which the system is mounted.
  • the system thus described as a non-limitative example is of small size, the inside enclosure having a volume well filled by the burning assembly and the heating element.
  • the burner can easily be dismounted after removable plate 22 of the skirt has been lifted out, its support 16 being disengaged from recess 15.
  • the hood itself is easily placed on heating element 9.
  • the latter can also be raised such that tubes can be removed from the orifices provided in the horizontal ledge.
  • front wall 33 covers only the tight enclosure leaves all the mechanisms located in the lower part fully accessible: during normal operation they are concealed only by an easily removable external facing, even a pivoting or tilting facing. These mechanisms are also properly ventilated by the ambient air. Since they are heat insulated from the hot part by partition 1, they can be made of normal material,
  • a forced-draft furnace comprising:
  • a rectangular enclosure thhe top portion of which is substantially imperforate except for a combustion air inlet and a combustion products outlet in' the back panel of said enclosure; a U-shaped partition separating top and bottom portions of said enclosure;
  • said heat exchanger being provided with a shroud, including a skirt portion which extends down into the depending portion of said partition with a predetermined gap therebetween; and means for exhausting combustion products from said shroud through said outlet, whereby air entering said inlet passes around said shroud and through said gap between said skirt and the depending portion of said partition to said burner.
  • part of said enclosure and the lower portion of said partition form an air-tight compartment in the shape of sua rectangular enclosure, the top portion of which is substantially imperforate except for a combustion air inlet and a concentric combustion productsoutlet in the back panel of said enclosure; bridging said enclosure, a U-shaped partition having laterally-extending horizontal shoulders, said partition separating top and bottom portions of said en- 7 closure; mounted in the lower portion of said partition, a
  • a water-tube heat exchanger bridging said said heat exchanger being provided with a shroud including a skirt portion which extends down into 4 I the depending portion of said partition with a pre determined gap therebetwen;
  • means including a blower for exhausting combustion products from said shroud through said outlet, whereby air entering said inlet passes around said shroud and through said gap between said skirtand I the depending portion of said partition to said ing the spacing of said skirt therefrom.

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  • 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)
  • Housings, Intake/Discharge, And Installation Of Fluid Heaters (AREA)
  • Incineration Of Waste (AREA)
US531888A 1973-12-13 1974-12-12 Arrangement and mounting of the enclosure and combustion chamber of a forced-draft boiler Expired - Lifetime US3921592A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR7344462A FR2327496A1 (fr) 1973-12-13 1973-12-13 Agencement et montage de l'enceinte etanche et de la chambre de combustion d'une chaudiere etanche a gaz a tirage force

Publications (1)

Publication Number Publication Date
US3921592A true US3921592A (en) 1975-11-25

Family

ID=9129146

Family Applications (1)

Application Number Title Priority Date Filing Date
US531888A Expired - Lifetime US3921592A (en) 1973-12-13 1974-12-12 Arrangement and mounting of the enclosure and combustion chamber of a forced-draft boiler

Country Status (7)

Country Link
US (1) US3921592A (fr)
JP (1) JPS5821183B2 (fr)
BE (1) BE823252A (fr)
ES (1) ES432855A1 (fr)
FR (1) FR2327496A1 (fr)
GB (1) GB1462439A (fr)
IT (1) IT1027683B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491092A (en) * 1982-10-05 1985-01-01 Societe Anonyme Saunier Duval/Eau Chaude/Chauffage-S.D.E.C.C. Sealed forced-draft gas boiler disposition
US6138666A (en) * 1998-11-10 2000-10-31 Teledyne Technologies Incorporated Direct fired outdoor heater and heating method
CN111473517A (zh) * 2020-04-16 2020-07-31 吉林市安瑞克能源科技开发有限公司 一种可调管束式换热器、烘干塔换热调节系统及方法

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2452059A1 (fr) * 1979-03-21 1980-10-17 Saunier Duval Dispositif d'evacuation des gaz brules et d'admission d'air frais pour appareils etanches a gaz
FR2461199A1 (fr) * 1979-07-13 1981-01-30 Leblanc Sa E L M Perfectionnements apportes aux chambres de combustion d'appareils chauffes au gaz
GB2145204B (en) * 1983-07-29 1986-10-22 Ti Glow Worm Ltd Installation of wall-mounted gas appliances
ITMI20020089U1 (it) * 2002-02-22 2003-08-22 Baxi Spa Caldaia murale con condotto di scarico posteriore

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361181A (en) * 1965-05-13 1968-01-02 Vaillant Joh Kg Water heater with sealed gas burner
US3388692A (en) * 1966-09-29 1968-06-18 William A. Hale Modular boiler
US3707142A (en) * 1971-01-26 1972-12-26 Paloma Kogyo Kk Heat-preserving boiler
US3797477A (en) * 1972-01-10 1974-03-19 Teledyne Inc Convertible gas heating apparatus
US3800748A (en) * 1973-01-08 1974-04-02 Mms Ltd Fluid heater appliance

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3361181A (en) * 1965-05-13 1968-01-02 Vaillant Joh Kg Water heater with sealed gas burner
US3388692A (en) * 1966-09-29 1968-06-18 William A. Hale Modular boiler
US3707142A (en) * 1971-01-26 1972-12-26 Paloma Kogyo Kk Heat-preserving boiler
US3797477A (en) * 1972-01-10 1974-03-19 Teledyne Inc Convertible gas heating apparatus
US3800748A (en) * 1973-01-08 1974-04-02 Mms Ltd Fluid heater appliance

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4491092A (en) * 1982-10-05 1985-01-01 Societe Anonyme Saunier Duval/Eau Chaude/Chauffage-S.D.E.C.C. Sealed forced-draft gas boiler disposition
US6138666A (en) * 1998-11-10 2000-10-31 Teledyne Technologies Incorporated Direct fired outdoor heater and heating method
CN111473517A (zh) * 2020-04-16 2020-07-31 吉林市安瑞克能源科技开发有限公司 一种可调管束式换热器、烘干塔换热调节系统及方法
CN111473517B (zh) * 2020-04-16 2022-04-15 吉林市安瑞克能源科技开发有限公司 一种可调管束式换热器、烘干塔换热调节系统及方法

Also Published As

Publication number Publication date
GB1462439A (en) 1977-01-26
JPS5821183B2 (ja) 1983-04-27
BE823252A (fr) 1975-04-01
FR2327496B1 (fr) 1978-02-24
DE2458865A1 (de) 1975-06-26
FR2327496A1 (fr) 1977-05-06
DE2458865B2 (de) 1977-06-08
IT1027683B (it) 1978-12-20
JPS50117048A (fr) 1975-09-12
ES432855A1 (es) 1976-11-01

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Legal Events

Date Code Title Description
AS Assignment

Owner name: SAUNIER DUVAL EAU CHAUDE CHAUFFAGE - S.D.E.C.C., F

Free format text: CHANGE OF NAME;ASSIGNOR:OFREVAL 54, AVENUE HOCHE 75008 PARIS, FRANCE;REEL/FRAME:006376/0981

Effective date: 19800131

Owner name: OFREVAL, FRANCE

Free format text: ASSIGNMENT OF ASSIGNORS INTEREST.;ASSIGNOR:SAUNIER, DUVAL;REEL/FRAME:006376/0938

Effective date: 19790924