US3707142A - Heat-preserving boiler - Google Patents

Heat-preserving boiler Download PDF

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Publication number
US3707142A
US3707142A US183521A US3707142DA US3707142A US 3707142 A US3707142 A US 3707142A US 183521 A US183521 A US 183521A US 3707142D A US3707142D A US 3707142DA US 3707142 A US3707142 A US 3707142A
Authority
US
United States
Prior art keywords
water tank
cover
air passage
outlet
inlet
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
US183521A
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English (en)
Inventor
Shiro Kobayashi
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.)
Paloma Kogyo KK
Original Assignee
Paloma Kogyo KK
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 Paloma Kogyo KK filed Critical Paloma Kogyo KK
Application granted granted Critical
Publication of US3707142A publication Critical patent/US3707142A/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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    • 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
    • F24H1/18—Water-storage heaters
    • F24H1/20—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes
    • F24H1/205—Water-storage heaters with immersed heating elements, e.g. electric elements or furnace tubes with furnace tubes
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F22—STEAM GENERATION
    • F22B—METHODS OF STEAM GENERATION; STEAM BOILERS
    • F22B9/00—Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body
    • F22B9/02—Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body the boiler body being disposed upright, e.g. above the combustion chamber
    • F22B9/04—Steam boilers of fire-tube type, i.e. the flue gas from a combustion chamber outside the boiler body flowing through tubes built-in in the boiler body the boiler body being disposed upright, e.g. above the combustion chamber the fire tubes being in upright arrangement

Definitions

  • the invention adds to a heat preserving boiler of the type including a water tank, a flue pipe extending vertically therethrough, and a combustion chamber disposed under the water tank, apparatus for improving the efficiency including a drum spaced from and surrounding the water tank to form an annular downward outlet air passage between the outer surface of the water tank and the inner surface of the drum, a cover spaced about the drum to form an annular upward outlet air passage between the outer surface of the drum and the inner surface of the cover, a housing spaced about the cover to form an annular inlet air passage, and an outlet duct connected with 7 Claims, 5 Drawing Figures PATENTED nan 2 6 m2 R O T N E V m SH/ R0 KOBA YA 671/,
  • the present invention relates to a heat-preserving boiler, and more particularly to an improved apparatus providing better combustion, heating and heat-preserving effects for the heat-preserving boiler.
  • a common outlet air passage is usually provided which simply extends vertically upward from a combustion chamber through the central portion of a water tank and is connected to a vertical chimney or the like.
  • Counter-blow check means is disposed between the passage and the chimney.
  • An object of the present invention is, therefore, to provide a heat preserving boiler incorporating novel outlet and inlet air passages which overcome the above-explained disadvantages of conventional boilers and prevent dangerous, uneconomic and incomplete combustion caused by inefficient air exhaustion which is attributed particularly to the counter-blow in the chimney.
  • Another object of the present invention is to provide a heat-preserving boiler, having the above-mentioned characteristics, wherein the exhaust air is utilized to increase efficiency by preserving the heat in,as well as increasing the heat applied to the boiler content.
  • Yet another object of the present invention is to provide a heat-preserving boiler, having the above-mentioned characteristics, wherein the chimney can be made very compact, thus reducing the production cost.
  • a further object of the present invention is to provide a heat-preserving boiler, having the above-mentioned characteristics, and wherein the construction is such as not to limit placement of the boiler, so that the boiler may be installed in places where vertical chimneys cannot be used.
  • a heat-preserving boiler having a water tank therein, a flue pipe extending vertically within the water tank, a combustion chamber disposed under the water tank, and a water admission arrangement and a water delivery system connected with the water tank
  • an apparatus which comprises, in combination, a drum disposed over the water tank and forming an annular downward outlet air passage between the outside wall of the water tank and the in-- side wall of the drum, the upper end plate of the drum making a ceiling slightly above the flue pipe, a-partition cover positioned over the drum and forming an annular upward outlet air passage between the outside of the drum and the inside of the cover, the cover including a concentrical opening in the upper plate thereof, a housing disposed over the cover and forming an annular inlet air passage between the inside of the housing and the outside of the cover, the housing including a concentrical opening in the top plate thereof, and the inlet air passage being connected with the combustion chamber through the lower end portion of the cover, an inlet air passage being connected with the combustion chamber through the lower end portion
  • FIG. 1 shows an elevational section of a preferred embodiment of the present invention
  • FIG. 2 is a partial rear side view of the apparatus shown in FIG. 1;
  • FIG. 3 is a cross-sectional view taken from line III III of FIG. 1 looking in the direction of the arrows;
  • FIG. 4 is a cross-sectional view taken along line IV- IV of FIG. 1 and looking in the direction of the arrows, and
  • FIG. 5 is a cross-sectional view taken on line VV of FIG. 1 looking in the direction of the arrows.
  • a preferred embodiment of the present invention comprises in its innermost part a cylindrical water tank 1 with a flue pipe 10 provided coaxially in the central portion of the water tank 1.
  • the outer circumference of the water tank 1 is covered with a hollow cylindrical drum 4 having an inverted U-shape in cross-section. Between the water tank 1 and the drum 4 is an appropriate annular space forming an annular downward outlet air passage 2.
  • the upper end circular plate of the drum 4 makes a ceiling 3 just above the flue pipe 10 of the water tank 1.
  • a hollow cylindrical partition cover 6 is lined with suitable heatproof and heat-preserving material such as glass wool, asbestos, or the like.
  • the partition cover 6 is so positioned as to cover the internal drum 4 and to provide an appropriate annular space between the lined inner circumferential surface thereof and the outer circumferential surface of the drum 4.
  • the annular space forms an upward outlet air passage 5 which is in open communication with the downward outlet air passage 2 at the lower end portion of the drum 4.
  • the flue pipe 10 extends from the upper end portion of a combustion chamber 9 to the upper end portion of the water tank 1 to communicate with the outlet air passages 2 and 5.
  • the partition cover 6 is covered over the outer circumference thereof with a hollow cylindrical housing 8.
  • An annular space constituting an inlet air passage 7 is formed between the inner circumferential surface of the housing 8 and the outer circumferential surface of the partition cover 6.
  • the inlet air passage 7 is in open communication with the combustion chamber 9 through a plurality of vent holes 1 l drilled through the lower end portion of the partition cover 6.
  • An outlet duct 12 communicates with a concentrical circular opening cut in the ceiling of the partition cover 6 an, thus, opens to the upward outlet air passage 5.
  • An inlet duct 13 communicates with a concentrical opening in the ceiling of the housing 8 and, thus, opens to the inlet air passage 7.
  • the outlet duct 12 may be disposed coaxially or eccentrically within the inlet duct 13.
  • the outlet duct 12 and the inlet duct 13 turn at a right angle at a point slightly above the ceiling of the housing 8, so
  • the horizontally extended portion of the outlet duct 12 is positioned eocentrically upward within the inlet duct 13.
  • the open end 14 of the outlet duct 12 protrudes slightly beyond the open end 15 of the inlet duct 13.
  • the heat-preserving boiler in this embodiment is further provided with a water supply pipe 16 connected to the lower portion of the water tank 1 and a hot-water outlet pipe 17 extending to the outside of the boiler from the upper portion of the water tank 1.
  • a gas burner 18 is also provided and a gas supply pipe therefor is connected to an automatic gas flow control apparatus 19 that controls the flow of gas by detecting precisely the temperature of water inside the water tank 1.
  • the heat-preserving boiler of this embodiment is properly installed to a wall D through a fixing hole 20 providedtherein for the inlet and outlet ducts 13 and 12 which are more firmly held by the fixing metal parts 21.
  • the heated air and gases ascending through the flue pipe are turned from their upward movement by the ceiling 3 of the internal drum 4, and then descend through the outlet air passage 2, heating the outer circumferential wall of the water tank 1 with their remaining heat. This increases the heating effect on the water inside the water tank 1.
  • Supply of fresh air to the combustion chamber 9 is properly carried out by inflow of air from the opening of the inlet duct 13.
  • the inflow of air passes through the inlet duct 13 into the inlet air passage 7.
  • the air is further lead into the combustion chamber 9 through the plural vent holes 1 1.
  • outlet duct 12 extends coaxially or eccentrically within the inlet duct 13, and
  • the opening 14 of the outlet duct 12 protrudes slightly beyond the opening 15 of the inlet duct 13. Consequently, the openings 14 and 15 of the outlet and inlet ducts 12 and 13 respectively, being offset on different planes, the inflow of the fresh air and outflow of the heated air do not affect each other and eliminate undesired effects of the wind pressure against the two openings 14 and 15. Furthermore, the described construction is such that unnecessary and harmful outside air is not allowed to enter the outlet duct 12. Thus, any possibility of counter-blow of exhaust air into the combustion chamber 9 caused by counter-blow of fresh air into the outlet duct 12 is prevented.
  • the gas burner 18 When the water inside the water tank 1 reaches a predetermined temperature, the gas burner 18 is shut off. At .this moment, the temperature inside the flue pipe 10 is almost equal to that in the outlet air passages 2 and 5. Thus, natural air convection ceases so that, consequently, the heated air is effectively utilized to preserve the temperature of the hot water inside the water tank 1.
  • the heat-preserving boiler as described does not require any special chimney or the like for the outflow of the exhaust air. It can be simply and easily set up in a desired and appropriate location with the duct ends 14 and 15 projecting slightly beyond the wall of the location and through an opening provided in such wall. This eliminates to a great extent restrictions as to placement and installation of conventional boilers.
  • a heat-preserving boiler including a water tank therein, a flue pipe extending vertically through said water tank, a combustion chamber disposed under said water tank, water admission means, and water delivery means connected with said water tank, of a tubular drum having a wall at its upper end spaced from and surrounding said water tank to form an annular downward outlet air passage between the outer surface of said water tank and the inner surface of said drum, the upper end wall of said drum defining a ceiling above said-flue pipe, a tubular cover having a wall at its upper end with an opening therein and positioned over said drum to form an annular upward outlet air passage between the outer surface of said drum and the inner surface of said cover, a tubular housing having a wall at its upper end with an opening therein and disposed over said cover to form an annular inlet air passage between the inner surface of the hous- IO60l2 0156 ing and the outer surface of said cover, said inlet air passage being connected with said combustion chamber through openings at the lower end portion of said cover,

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Heat-Pump Type And Storage Water Heaters (AREA)
  • Air Supply (AREA)
US183521A 1971-01-26 1971-09-24 Heat-preserving boiler Expired - Lifetime US3707142A (en)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1971002941U JPS4719843U (de) 1971-01-26 1971-01-26

Publications (1)

Publication Number Publication Date
US3707142A true US3707142A (en) 1972-12-26

Family

ID=11543369

Family Applications (1)

Application Number Title Priority Date Filing Date
US183521A Expired - Lifetime US3707142A (en) 1971-01-26 1971-09-24 Heat-preserving boiler

Country Status (5)

Country Link
US (1) US3707142A (de)
JP (1) JPS4719843U (de)
DE (1) DE2201317C3 (de)
FR (1) FR2124808A5 (de)
GB (1) GB1337512A (de)

Cited By (22)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921592A (en) * 1973-12-13 1975-11-25 Saunier Duval Arrangement and mounting of the enclosure and combustion chamber of a forced-draft boiler
US4253426A (en) * 1977-10-25 1981-03-03 Mitsubishi Denki Kabushiki Kaisha Reservoir type water heating device
US4295447A (en) * 1978-09-23 1981-10-20 Interliz Anstalt Heating boiler and temperature control therefor
US4338888A (en) * 1980-05-14 1982-07-13 Advanced Mechanical Technology, Inc. High efficiency water heating system
US4366778A (en) * 1980-03-27 1983-01-04 Paquet Thermique, S.A. Gas boiler able to operate in a sealed combustion circuit
US4387669A (en) * 1982-03-29 1983-06-14 Murrell's Welding Works, Inc. Heater
US4445464A (en) * 1980-05-14 1984-05-01 Advanced Mechanical Technology, Inc. High efficiency water heating system
US4448136A (en) * 1981-08-04 1984-05-15 British Gas Corporation Boiler with waste heat recovery
US4465025A (en) * 1982-04-17 1984-08-14 Schroeder Hans J Steam generator
US4549525A (en) * 1979-12-10 1985-10-29 Narang Rajendra K Oil and gas water heater
US4630553A (en) * 1983-06-06 1986-12-23 Goetzman Robert G Dual stage combustion furnace
US4632066A (en) * 1985-06-07 1986-12-30 Kideys Fazil F Multiple segment gas water heater and multiple segment gas water heater with water jacket
US4644904A (en) * 1984-02-23 1987-02-24 Hydrotherm Geraethebau Gmbh Gas fired heating boiler
US4664096A (en) * 1979-12-10 1987-05-12 Narang Rajendra K Oil and gas water heater
US4679528A (en) * 1983-11-24 1987-07-14 Remeha Fabrieken B.V. Heating boiler having a vertical burner tube
US4869232A (en) * 1979-12-10 1989-09-26 Narang Rajendra K Oil and gas water heater
US5020512A (en) * 1984-08-09 1991-06-04 State Industries, Inc. Water heater construction and method of heating water
US5765547A (en) * 1996-11-13 1998-06-16 La Plante; Thomas E. Heater fire prevention device, system and method
US5924390A (en) * 1997-02-28 1999-07-20 Bock; John C. Water heater with co-located flue inlet and outlet
US7013841B1 (en) 2005-02-01 2006-03-21 Rheem Manufacturing Company Differently configured fuel-fired water heaters constructed from identical production platforms
US20060081198A1 (en) * 2004-10-20 2006-04-20 American Water Heater Company, A Corporation Of Nevada Water heater with air intake and exhaust system
US20100101505A1 (en) * 2008-10-24 2010-04-29 Rodney Ray Syler Transition element for a passage in a water heater

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS51109103A (ja) * 1975-03-22 1976-09-27 Daido Concrete Kiseikuiumekomikoho
JPS51132807U (de) * 1975-04-17 1976-10-26
JPS52105938U (de) * 1976-02-09 1977-08-12
JPS53102510U (de) * 1977-01-24 1978-08-18
CA1264622A (en) * 1984-08-09 1990-01-23 State Industries, Inc. Water heater construction and method of heating water
EP0255919B1 (de) * 1986-08-04 1992-09-30 ATI di Mariani Mario & C. s.n.c. Mit gas beheizter Wassererhitzer

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3091223A (en) * 1961-02-27 1963-05-28 Bastian Morley Co Inc Sealed vent water heater
US3490420A (en) * 1967-12-13 1970-01-20 Gulf Research Development Co Induced draft oil-fired water heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3091223A (en) * 1961-02-27 1963-05-28 Bastian Morley Co Inc Sealed vent water heater
US3490420A (en) * 1967-12-13 1970-01-20 Gulf Research Development Co Induced draft oil-fired water heater

Cited By (27)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3921592A (en) * 1973-12-13 1975-11-25 Saunier Duval Arrangement and mounting of the enclosure and combustion chamber of a forced-draft boiler
US4253426A (en) * 1977-10-25 1981-03-03 Mitsubishi Denki Kabushiki Kaisha Reservoir type water heating device
US4295447A (en) * 1978-09-23 1981-10-20 Interliz Anstalt Heating boiler and temperature control therefor
US4549525A (en) * 1979-12-10 1985-10-29 Narang Rajendra K Oil and gas water heater
US4869232A (en) * 1979-12-10 1989-09-26 Narang Rajendra K Oil and gas water heater
US4664096A (en) * 1979-12-10 1987-05-12 Narang Rajendra K Oil and gas water heater
US4366778A (en) * 1980-03-27 1983-01-04 Paquet Thermique, S.A. Gas boiler able to operate in a sealed combustion circuit
US4401058A (en) * 1980-03-27 1983-08-30 Paquet Thermique, S.A. Gas boiler able to operate in a sealed combustion circuit
US4445464A (en) * 1980-05-14 1984-05-01 Advanced Mechanical Technology, Inc. High efficiency water heating system
US4338888A (en) * 1980-05-14 1982-07-13 Advanced Mechanical Technology, Inc. High efficiency water heating system
US4448136A (en) * 1981-08-04 1984-05-15 British Gas Corporation Boiler with waste heat recovery
US4387669A (en) * 1982-03-29 1983-06-14 Murrell's Welding Works, Inc. Heater
US4465025A (en) * 1982-04-17 1984-08-14 Schroeder Hans J Steam generator
US4630553A (en) * 1983-06-06 1986-12-23 Goetzman Robert G Dual stage combustion furnace
US4679528A (en) * 1983-11-24 1987-07-14 Remeha Fabrieken B.V. Heating boiler having a vertical burner tube
US4644904A (en) * 1984-02-23 1987-02-24 Hydrotherm Geraethebau Gmbh Gas fired heating boiler
US5020512A (en) * 1984-08-09 1991-06-04 State Industries, Inc. Water heater construction and method of heating water
US4632066A (en) * 1985-06-07 1986-12-30 Kideys Fazil F Multiple segment gas water heater and multiple segment gas water heater with water jacket
US5765547A (en) * 1996-11-13 1998-06-16 La Plante; Thomas E. Heater fire prevention device, system and method
US5924390A (en) * 1997-02-28 1999-07-20 Bock; John C. Water heater with co-located flue inlet and outlet
US20060081198A1 (en) * 2004-10-20 2006-04-20 American Water Heater Company, A Corporation Of Nevada Water heater with air intake and exhaust system
US20060191497A1 (en) * 2004-10-20 2006-08-31 American Water Heater Company, A Corporation Of Nevada Water heater with air intake and exhaust system
US7159540B2 (en) 2004-10-20 2007-01-09 American Water Heater Company Water heater with air intake and exhaust system
US20070079771A1 (en) * 2004-10-20 2007-04-12 American Water Heater Company, A Corporation Of Nevada Water heater with air intake and exhaust system
US7013841B1 (en) 2005-02-01 2006-03-21 Rheem Manufacturing Company Differently configured fuel-fired water heaters constructed from identical production platforms
US20100101505A1 (en) * 2008-10-24 2010-04-29 Rodney Ray Syler Transition element for a passage in a water heater
US8113154B2 (en) 2008-10-24 2012-02-14 Aos Holding Company Transition element for a passage in a water heater

Also Published As

Publication number Publication date
FR2124808A5 (de) 1972-09-22
DE2201317A1 (de) 1973-08-09
DE2201317B2 (de) 1974-03-07
GB1337512A (en) 1973-11-14
JPS4719843U (de) 1972-11-06
DE2201317C3 (de) 1974-10-03

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