US3200810A - Hot air generator - Google Patents

Hot air generator Download PDF

Info

Publication number
US3200810A
US3200810A US268376A US26837663A US3200810A US 3200810 A US3200810 A US 3200810A US 268376 A US268376 A US 268376A US 26837663 A US26837663 A US 26837663A US 3200810 A US3200810 A US 3200810A
Authority
US
United States
Prior art keywords
heat exchanger
sheath
hot air
air
elements
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
US268376A
Other languages
English (en)
Inventor
Hancart Aime
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.)
Couvinoise SA
Sa La Couvinoise
Original Assignee
Couvinoise 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 Couvinoise SA filed Critical Couvinoise SA
Application granted granted Critical
Publication of US3200810A publication Critical patent/US3200810A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

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
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/06—Air heaters with forced circulation the air being kept separate from the heating medium, e.g. using forced circulation of air over radiators

Definitions

  • the present invention has for its object the execution of a hot air generator adapted to transfer the heat produced by a burner burning a solid, liquid or gasiform fuel to air flowing over the surfaces of a suitable heat exchanger under high yield conditions, with a bulk reduced to a minimum.
  • the improved generator of hot air is contained inside a metal or the like sheath having a circular or square cross-section and forming a header through which air flows under the action of a fan located outside said sheath, which latter carries inside it in superposition the following parts: at the lower end, a gasifying burner and above the latter and above the input of air entering the sheath, a cylindrical heating body made of a sheet of ordinary or stainless steel inside which the combustion is propagated vertically and then, over said body, a heat exchanger constituted by elements arranged in star formation and forming between them radial recesses, said heat exchanger being finally capped by a smoke box provided with a lateral or an axial output, the assembly between said heat exchanger and the heating body, on the one hand, and the smoke box, on the other hand, being provided by the fitting of a coaxial ring between the parts considered.
  • the heat exchanger made of sheets of ordinary or stainless steel, is constituted by hollow stamped radial elements arranged in star formation, extending in vertical planes and welded together at their inner ends, each element being in the shape of a sector of the circle enclosing the heating body and the outer periphery of each element being formed by an arc of a constant length of said circle.
  • a deflector is fitted inside the sheath between the latter and the periphery of the heat exchanger and towards the middle of the height of the latter so as to form a diaphragm which constrains the hot air to flow upwardly through the recesses formed between the elements in star formation of the heat exchanger.
  • FIG. 1 is an elevational view of the generator executed in accordance with the invention, the actual sheath being partly torn off.
  • FIG. 2 is an elevational view, on a larger scale, of the heat exchanger capped by its smoke box, the 1eft-hand side corresponding to a half section through line AB of FIG. 3, while the right-hand cross-section is executed through line CD of FIG. 3.
  • FIG. 3 is a transverse cross-section through the heat exchanger.
  • the generator according to the invention is carried inside a sheath 1 made of metal or any other suitable material and showing a circular or square cross-section, said sheath receiving the air flowing under the action of the fan 2 located outside said sheath.
  • Said sheath contains, when considered from bottom to top, first a burner 3 burning a solid, liquid or gasiform fuel so as to heat a cylindrical body 4 in the shape of a cylinder of ordinary or stainless steel sheet material and inside which the combustion is propagated vertically, said body 4 lying inside the sheath at a level which extends into the path of the input of the air delivered by the fan 2.
  • Each element 7 is enclosed inside a section of the geometrical cylinder ci-rcumscribing the heating body 4 while the outer end of each said element extends along the periphery of said cylinder over an arcthe length of which is the same for all the elements.
  • the inner volume of the heat exchanger includes thus in horizontal cross-section N circular sectors producing a subdivision into separate sheets of the rising stream of burnt gases.
  • the elements 7 of the heat exchanger form the inner section of the heat exchanger, which section provides a direct passageway for the burnt gases produced by the combustion of the fuel in the direction illustrated by the arrow F, as shown on the left-hand side cross-section of FIG. 2, while the radial recesses 9 provided on the outside of the heat exchanger are swept by the air to be heated as illustrated on the right-hand side cross-section of FIG. 2.
  • a deflector 10 is arranged inside the sheath round the periphery of the heat exchanger 6 at about midheight of the latter. Said deflector acts as a diaphragm which ensures the entrance of the flow of air inside the radial recesses 9 extending between the star-shaped elements of the heat exchanger.
  • the hot air follows the path illustrated by the arrows G and H in FIG. 2.
  • the heat exchanging surface between the: air flowing along the outer surfaces of the heat exchanger and the burnt gases has a value equal to ND sq. in. per meter of height of the heat exchanger in the case of elements having flat surfaces and 1.4 ND sq. in. per meter of height of a heat exchanger having corrugated surfaces.
  • a smoke box 12 which may be provided, either with a lateral output as illustrated in FIG. 2, or else with an axial output.
  • the system including the heating body 4 and the smoke box 12 forms a fluidtight unit adapted to expand freely inside the sheath 1.
  • an outer sheath having therein an upright heating body consisting of a fuel burner, a combustion chamber, a heat exchanger and a smoke box interconnected serially in the order listed, said sheath being separated from said interconnected members by an air passage, said heat exchanger consisting of element-s which are all alike, one portion of said elements comprising vertical walls of generally fiat sides which have approximately the form of dihedral angles whose planes are axial planes of a main cylinder, said Walls extending radially in said cylinder to form said dihedral angles, and another portion of said elements comprising vertical arcuate portions welded together so as to form a cylinder presenting deep alveoles, each dihedral angle being bounded at the top and bottom by sectors of welded sheetmetal, Welded to said vertical walls, said sheath surrounding said heat exchanger in spaced relation thereto;
  • a deflector formed by a sheet metal diaphragm mounted in the air passage inside the sheath and on the periphery of said heat exchanger compelling the air which rises in the sheath to enter the interior of the dihedral angles;

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)
  • Heat-Exchange Devices With Radiators And Conduit Assemblies (AREA)
US268376A 1962-04-25 1963-03-27 Hot air generator Expired - Lifetime US3200810A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
FR895478A FR1324501A (fr) 1962-04-25 1962-04-25 Générateur d'air chaud

Publications (1)

Publication Number Publication Date
US3200810A true US3200810A (en) 1965-08-17

Family

ID=8777564

Family Applications (1)

Application Number Title Priority Date Filing Date
US268376A Expired - Lifetime US3200810A (en) 1962-04-25 1963-03-27 Hot air generator

Country Status (6)

Country Link
US (1) US3200810A (de)
AT (1) AT239479B (de)
CH (1) CH394552A (de)
ES (1) ES285530A1 (de)
FR (1) FR1324501A (de)
GB (1) GB965383A (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277340A (en) * 1941-02-03 1942-03-24 Magiera Thomas Heater
US2428066A (en) * 1942-11-17 1947-09-30 Garrett Corp Exhaust heat exchanger
US2430227A (en) * 1944-03-10 1947-11-04 Air Preheater Air heater with corrugated core
US2600020A (en) * 1948-11-26 1952-06-10 Dravo Corp Forced air flow air-heating furnace
US2655143A (en) * 1948-04-06 1953-10-13 Herbster Schmiler Inc Fuel burning air heater with upright tubes
US2692763A (en) * 1952-03-08 1954-10-26 Air Preheater Supporting spacer for annular corrugated fins
FR64927E (fr) * 1953-03-20 1955-12-14 Générateur d'air chaud

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2277340A (en) * 1941-02-03 1942-03-24 Magiera Thomas Heater
US2428066A (en) * 1942-11-17 1947-09-30 Garrett Corp Exhaust heat exchanger
US2430227A (en) * 1944-03-10 1947-11-04 Air Preheater Air heater with corrugated core
US2655143A (en) * 1948-04-06 1953-10-13 Herbster Schmiler Inc Fuel burning air heater with upright tubes
US2600020A (en) * 1948-11-26 1952-06-10 Dravo Corp Forced air flow air-heating furnace
US2692763A (en) * 1952-03-08 1954-10-26 Air Preheater Supporting spacer for annular corrugated fins
FR64927E (fr) * 1953-03-20 1955-12-14 Générateur d'air chaud

Also Published As

Publication number Publication date
FR1324501A (fr) 1963-04-19
AT239479B (de) 1965-04-12
CH394552A (fr) 1965-06-30
GB965383A (en) 1964-07-29
ES285530A1 (es) 1963-05-01

Similar Documents

Publication Publication Date Title
US4055152A (en) Gas boiler, particularly for central heating
US3267985A (en) Pulse combustion apparatus
US2642046A (en) Stand boiler with vertical flue, circulating coil, and indirectly heated domestic supply
US1917275A (en) Boiler
US2160644A (en) Steam generating system
GB684602A (en) Improvements in tubular heat exchanger elements, particularly for steam boilers
US3200810A (en) Hot air generator
US1881275A (en) Heater
US2620787A (en) Forced air flow unit air-heating furnace
US1536220A (en) jouclard
US2704062A (en) Air heating furnace
US3200870A (en) Double vortex combustion chamber apparatus
US2718217A (en) Water heating apparatus
US1640317A (en) Steam boiler
US3353528A (en) Heater construction
US2625917A (en) Fluid heating apparatus
US2755793A (en) Space heater for use on open gas burner
US2454943A (en) Heater for hydrocarbon fluids
US1924209A (en) Boiler
US1782171A (en) Heat-conducting means for steam generators or fluid heaters
US2998807A (en) Water tube boiler or steam generator
US1826358A (en) Steam generator or water heater
US1255454A (en) Hot-water heater.
US2637314A (en) Forced downward air flow air
ES413095A1 (es) Perfeccionamientos en la construccion de calderas vertica- les para el calentamiento de liquidos de trasnmision de ca- lor que no hierven.