US3269382A - Combination water and space heater - Google Patents

Combination water and space heater Download PDF

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US3269382A
US3269382A US485297A US48529765A US3269382A US 3269382 A US3269382 A US 3269382A US 485297 A US485297 A US 485297A US 48529765 A US48529765 A US 48529765A US 3269382 A US3269382 A US 3269382A
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tank
air
wall
housing
top wall
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US485297A
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Kenneth M Ronan
Donald O Hagerty
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Ronan and Kunzl Inc
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Ronan and Kunzl Inc
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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
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H6/00—Combined water and air heaters

Definitions

  • An object of this invention is to improve the combination water and space heater structure disclosed in the Handley patent.
  • a specific object of this invention is to provide a combination water and space heater with improved efficiency of operation.
  • Still another specific object of this invention is to provide such a combination water and space heater with improved simplicity of construction and economy of manufact-ure.
  • FIG. 1 is a View in elevation of a preferred, specific embodiment of the improved combination Water and space heater of this invention
  • FIG. 2 is a plan view of the specific, combination water heater and space heater of FIG. 1;
  • FIG. 3 is a view of a vertical section of the heater of FIGS. 1 and 2, which view has been taken as indicated by the sectioning lines 33 in FIGS. 2 and 4;
  • FIG. 4 is a view of a horizontal section of a lower portion of the heater of FIGS. 1 and 3, which View has been taken as indicated by the sectioning lines 44 of FIGS. 1 and 3.
  • FIG. 3 illustrates an improved combination water and space heater 10. As shown in FIG. 3 it has a normally vertical axis A-A and it comprises a hot water tank 11, a fuel combustion chamber 12, housing 14, water inlet and outlet means 15, air blower means 16, hot air outlet means 17, combustion gas vent means 18 and fuel burner means 19.
  • the hot water tank 11 comprises a top wall 20, a bottom wall 22 and a cylindrical side wall 24. These walls are coaxially disposed relative tothe vertical axis AA of the heating apparatus 10. These walls are joined together as by weldments to form a Water tight structure.
  • the bottom wall 22 is preferably arcuate. In the specific embodiment shown it is such that the bottom of the tank as viewed from inside the tank is convex while the bottom of the tank as viewed from below the tank is concave.
  • the bottom wall 22 is spaced upwardly from the normally bottom end of the cylindrical side wall 24, [whereby the lower portion of the cylindrical side wall 24 extends below the bottom wall 22 of the tank and forms a skirt portion 26.
  • the fuel combustion chamber 12 which has a normally vertical axis coincident with the normally vertical axis AA of the heating apparatus 10, is defined by a top wall 28 and the skirt portion 26 of the cylindrical side Wall 24.
  • the top wall 28 is joined as by gas tight weldment to the skirt portion 26.
  • the top Wall 28 is arcuate. In the specific embodiment shown its shape is in substan- 3,26%,382 Patented August 30, 1966 "ice tial conformity with that of the bottom wall of the hot water tank, whereby it is convex on top side and concave on the bottom side.
  • the bottom side of the bottom wall 22 of the hot water tank 11 and the top side of the top wall 28 of the fuel combustion chamber 12 are vertically spaced from one another whereby there is provided an air heating chamber 30.
  • the skirt portion 26 of the cylindrical side wall 24 around the air heating chamber 30 has therein an air inlet opening 32 and a diametrically disposed air outlet opening 34 in which is a hot air outlet duct 66.
  • the heater apparatus housing 14 has a normally vertical axis coincident with the normally vertical axis AA of the heater apparatus 10.
  • the housing 14 comprises a generally round top wall 38 and a cylindrical side wall 40.
  • the housing 14 encloses topwise and sidewise the hot water tank 11 and the fuel combustion chamber 12.
  • the top wall 38 of the housing 14 is vertically spaced from the top wall 20 of the hot water tank L1 and the cylindrical side wall 40 of the housing 14 is radially spaced from the cylindrical side Wall 24 of the hot water tank 11, the air heating chamber 30 and the fuel combustion chamber 12.
  • top wall 20 of the hot water tank .1 1 and the top wall 38 of the housing 14 an air space 42, and between the cylindrical side wall 24 of the hot water tank .11 and cylindrical side wall 40 of the housing 14 an annular air space 44 with the air space 42 merging into the air space 44.
  • the top wall 38 of the housing 14 comprises an inner shell 46 and an outer shell 48 with thermal insulation 50 in between, while the cylindrical side wall 40 comp-rises an inner cylindrical shell 52 and an outer cylindrical shell 54 with thermal insulation 56 in between.
  • the housing 14 also comprises bottom closure means in combination with the skirt portion 26 below the air inlet opening 32 through the skirt portion 26, which means encloses the annular air space at the normally bottom end thereof.
  • the bottom closure means comprises a generally round, pan-like base '58 fastened to downwardly extending support legs 60 and fastened to the bottom end of the cylindrical side wall 40 of the housing I14.
  • the bottom end of the skirt portion 26 rests on the base 58 and preferably is fastened thereto by a suitable connection.
  • the center of the base 56 preferably has an opening 6-2 therethroug-h for the passage of air into the combustion chamber 12.
  • the opening is covered by a floor protection plate 64 within the fuel combustion chamber 12, which plate is spaced from the base 58. It rests on supports 66 extending upwardly from the base 58.
  • the water inlet and outlet means 15 comprise a cold water intake pipe 68 and a hot water discharge pipe 70. Both pipes are disposed in air tight relationship through openings in the top wall 38, through the top air space 42, and in water tight relationship through openings through the top wall 20 of the hot water tank 11.
  • the intake end of the hot water discharge pipe 71 is disposed in the region of the top wall 20 while the discharge end of the cold water intake pipe 68 is disposed in the region of the bottom wall 22 of the tank 11.
  • the air blower means 16 of the space and water heater 10 of this invention are generally mounted on the top drive motor, which casing has an air intake opening 72 disposed outside of the housing 14 of said space and water heater 10, and a pressure air discharge duct 74.
  • the pressure air discharge duct 74 extends preferably in substantially air tight relationship through an opening through the top wall 38 of the housing 14 and into the top air space 42 between the top wall 20 of the hot water tank 11 and the top wall 38 of the housing 14.
  • the internal structure of the air blower means 16 employed in the specific embodiment shown in the drawing is of conventional structure and, therefore, need not be further described herein.
  • the hot air outlet means 17 comprises the hot air outlet duct 36. This duct extends from the air outlet opening 34 through the skirt portion 26 of the cylindrical side wall 24 and in air tight relationship through a suitable opening in the cylindrical side wall 40 of the housing 14 to the exterior of the housing 14.
  • the combustion gas vent means 18 comprises a normally straight, cylindrical, heat exchange and vent pipe 78 disposed with its axis substantially coincident with the normally vertical axis A-A of the space and water heater of this invention.
  • the pipe 78 extends downwardly in air tight relationship through the top wall 38 of the housing 14 in water tight relationship through the top wall 20 of the hot water tank 11, through the hot water tank 11, in water tight relationship through the bottom wall 22 of the hot water tank 11, through the air heating chamber and in air tight relationship through the top wall 28 of the fuel combustion chamber 12.
  • the intake opening 80 of the combustion gas vent pipe 78 is positioned within the fuel combustion chamber 12 and substantially spaced downwardly from the top wall 28 or dome of the fuel combustion chamber 12. One reason for this is to maximize heat exchange between burning fuel in the fuel combustion chamber 12 and the top wall 28 of the fuel combustion chamber 12.
  • the fuel burner means 19 are centrally disposed in the fuel combustion chamber 12 and preferably are arranged and constructed so as to eject fluid fuel towards the skirt portion 26 surrounding the fuel combustion chamber 12.
  • the fuel burner means comprises a gas burner of conventional construction with burner jets 82 being disposed about the circumference of a horizontally disposed, ring manifold 83, the normally vertical axis of which is substantially coincident with the axis A-A of the heating apparatus 10.
  • the burner jets 82 face towards the skirt portion 26 surrounding the fuel combustion chamber 12.
  • the fuel burner means 19 include a conventional, hot Water thermostat 86 (see FIG. 1) mounted on the outside of the housing 14.
  • the thermostate 86 has a thermostatic element (not shown) extending through the side wall of the housing -14 and hot water tank side wall 24 into the hot water tank 11.
  • the air blower means 16 also comprise an air thermostat 88 mounted on the exterior of the cylindrical side wall 40 of the housing 14 and so mounted at a point thermally remote from the hot air outlet means 17.
  • the air thermostat 88 is electrically associated with the air blower motor, the wiring being disposed within the housing 14.
  • the operation of the air blower motor to be controlled manually either with or without the simultaneous, automatic control of the air thermostat.
  • the air thermostat 88 to be mounted on the wall of the room in which the heating apparatus 10 is located, or elsewhere, rather than on the cylindrical side wall 40 of the housing 14, or to :have in addition to the air thermostat 88 on the cylindrical side wall 40 another air thermostat 88 either in the same room as the heating apparatus 10 or elsewhere, with the two air thermostats being electrically hooked up in parallel to the air blower motor.
  • water in the hot water tank 11 is heated by heat from the fuel burner means 19, which heat is conveyed through the top wall 28 of the fuel combustion chamber, the air heating chamber 30 and the bottom wall 22 of the hot water tank 11, and through the combustion .gas vent pipe 78.
  • the temperature of the water in the hot water tank 11 and the operation of the fuel burner means 19 are controlled by the water thermostat 86.
  • the air thermostat 88 actuates the air blower motor, air is sucked through the air intake opening 72 of air blower and is blown through the air discharge duct 74 into the air space 42 between the top of the hot water tank 11 and the housing 14.
  • the air passes down into the air space 44 about the hot water tank side wall 24, acquiring heat from the hot water tank 11, through the air inlet opening 32 in the skirt portion 26 and into the air heating chamber 30.
  • the air passes through the air heating chamber 30 picking up more heat therein, and then passes through the hot air means 17 into the room in which the combination water and space heater 10 is located.
  • the air blower motor is turned off.
  • an improved, combination space and water heater Not only is the construction improved, but the efficiency is substantially improved.
  • the water storage capacity was 30 gallons
  • the air volume throughput was 101.6 cubic feet per minute
  • the gas burner input was 24,895 Btu. per hour
  • hourly recovery (based on a 70% efficient minimum requirement input divided by 1190) was 21 gallons
  • the warm air output at a selected burner on and off cycle was 4,594 B.t.u. per hour.
  • An improved combination space and water heating apparatus which comprises:
  • a hot water tank defined by top, bottom and cylindrical side walls and comprising cold water inlet means and hot water outlet means, said tank having a normally vertical axis;
  • a fuel combustion chamber defined by top, bottom and cyclindrical side walls, said chamber having a normally vertical axis coincident with said axis of said tank, said top wall being below said bottom wall of said tank and spaced therefrom, the space between said bottom wall of said tank and said top wall of said fuel combustion chamber forming an air heating chamber;
  • a housing comprising a top wall and a cylindrical side wall surrounding said tank, said housing having a normally vertical axis coincident with said axis of said tank, said top wall of said housing being spaced from said top wall of said tank and said side wall of said housing being spaced from said side wall of said tank, whereby there is provided air space between the top and side walls of said housing and the top and side walls of said tank and at least said side wall of said fuel combustion chamber in the region of said top wall thereof, said air space being in air flow communication with said air heating chamber, said housing further comprising bottom closure means in combination with said side wall of said fuel combustion chamber, which bottom closure means enclose said air space at the normally bottom end thereof;
  • hot air outlet means in combination with said air heating chamber and comprising a duct disposed through said housing for the passage of hot air from said air heating chamber to outside of said housing;
  • air blower means in communication with the air space between the top Wall of said tank and the top wall of said housing for introducing air into said air space from outside of said housing;
  • combustion gas vent means comprising a pipe disposed along said axis through said top wall of said housing, top wall of said tank, said tank, said bottom wall of said tank and said top Wall of said combustion chamber with the intake end thereof being disposed in said fuel combustion chamber and substantially spaced normally downwardly from said top wall of said fuel combustion chamber;
  • a heater according to claim 5 wherein said cylindrical side wall of said hot water tank forms the cylindrical side wall of said fuel combustion chamber and of said air heating chamber, and has an opening therein diametrically opposed to said duct, whereby air in the air space between the cylindrical side wall of said housing and the cylindrical side wall of said tank can flow into said air heating chamber.
  • An improved combination space and water heating apparatus which comprises:
  • a hot water tank defined by top, bottom and cylindrical side walls and comprising cold water inlet means and hot water outlet means, said tank having a normally vertical axis;
  • a fuel combustion chamber defined by top, bottom and cylindrical side walls, said chamber having a normally vertical axis coincident with said axis of said tank, said top wall being arcuate, below said bottom wall of said tank and spaced therefrom, the space between said bottom wall of said tank and said top wall of said fuel combustion chamber forming an air heating chamber;
  • a housing comprising a top wall and a cylindrical side wall surrounding said tank, said housing having a normally vertical axis coincident with said axis of said tank, said top wall of said housing being spaced from said top wall of said tank and said side wall of said housing being spaced from said side wall of said tank, whereby there is provided air space between the top and side walls of said housing and the top and side walls of said tank and at least said side wall of said fuel combustion chamber in the region of said top wall thereof, said air space being in air flow communication with said air heating chamber, said housing further comprising bottom closure means in combination with said side wall of said fuel combustion chamber, which bottom closure means enclose said air space at the normally bottom end thereof;
  • hot air outlet means in combination with said air heating chamber and comprising a duct disposed through said housing for the passage of hot air from said air heating chamber to outside of said housing;
  • air blower means in communication with the air space between the top wall of said tank and the top wall of said housing for introducing air into said air space from outside of said housing;
  • combustion gas vent means comprising a pipe disposed along said axis through said top wall of said housing, top wall of said tank, said tank, said bottom wall of said tank and said top wall of said combustion chamher with the intake end thereof being disposed in said fuel combustion chamber;

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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)
  • Direct Air Heating By Heater Or Combustion Gas (AREA)

Description

Aug. 30, 1966 K. M. RONAN ETAL 3,269,382
COMBINATION WATER AND SPACE HEATER Filed Sept. 7, 1965 INVENTORS. Kevmef/v M Rona/7 Dona/0 Q Hayer/y ATTORNEY United States Patent This invention resides in the mechanical arts. More particularly, it relates to combination water and space heaters.
In the US. Patent No. 2,833,267, to Handley, there is disclosed a combination water and space heater. This is a heating apparatus having structure which functions not only to heat water, but also to provide heated air. Such an apparatus has utility in milk houses, on dairy farms, in house trailers, tourist cabins, and the like.
An object of this invention is to improve the combination water and space heater structure disclosed in the Handley patent. Y
A specific object of this invention is to provide a combination water and space heater with improved efficiency of operation.
Still another specific object of this invention is to provide such a combination water and space heater with improved simplicity of construction and economy of manufact-ure.
These and other objects as appear as this specification proceeds are achieved by this invention.
This invention is described in relation to the drawing which comprises a material part of the disclosures. In the drawing:
FIG. 1 is a View in elevation of a preferred, specific embodiment of the improved combination Water and space heater of this invention;
FIG. 2 is a plan view of the specific, combination water heater and space heater of FIG. 1;
FIG. 3 is a view of a vertical section of the heater of FIGS. 1 and 2, which view has been taken as indicated by the sectioning lines 33 in FIGS. 2 and 4; and
FIG. 4 is a view of a horizontal section of a lower portion of the heater of FIGS. 1 and 3, which View has been taken as indicated by the sectioning lines 44 of FIGS. 1 and 3.
In greater detail, the drawing illustrates an improved combination water and space heater 10. As shown in FIG. 3 it has a normally vertical axis A-A and it comprises a hot water tank 11, a fuel combustion chamber 12, housing 14, water inlet and outlet means 15, air blower means 16, hot air outlet means 17, combustion gas vent means 18 and fuel burner means 19.
The hot water tank 11 comprises a top wall 20, a bottom wall 22 and a cylindrical side wall 24. These walls are coaxially disposed relative tothe vertical axis AA of the heating apparatus 10. These walls are joined together as by weldments to form a Water tight structure. The bottom wall 22 is preferably arcuate. In the specific embodiment shown it is such that the bottom of the tank as viewed from inside the tank is convex while the bottom of the tank as viewed from below the tank is concave. The bottom wall 22 is spaced upwardly from the normally bottom end of the cylindrical side wall 24, [whereby the lower portion of the cylindrical side wall 24 extends below the bottom wall 22 of the tank and forms a skirt portion 26.
The fuel combustion chamber 12 which has a normally vertical axis coincident with the normally vertical axis AA of the heating apparatus 10, is defined by a top wall 28 and the skirt portion 26 of the cylindrical side Wall 24. The top wall 28 is joined as by gas tight weldment to the skirt portion 26. Preferably, the top Wall 28 is arcuate. In the specific embodiment shown its shape is in substan- 3,26%,382 Patented August 30, 1966 "ice tial conformity with that of the bottom wall of the hot water tank, whereby it is convex on top side and concave on the bottom side. The bottom side of the bottom wall 22 of the hot water tank 11 and the top side of the top wall 28 of the fuel combustion chamber 12 are vertically spaced from one another whereby there is provided an air heating chamber 30. Between the bottom side of the bottom wall 22 of the hot water tank 11 and the top side of the top wall of the fuel combustion chamber the skirt portion 26 of the cylindrical side wall 24 around the air heating chamber 30 has therein an air inlet opening 32 and a diametrically disposed air outlet opening 34 in which is a hot air outlet duct 66.
The heater apparatus housing 14 has a normally vertical axis coincident with the normally vertical axis AA of the heater apparatus 10. The housing 14 comprises a generally round top wall 38 and a cylindrical side wall 40. The housing 14 encloses topwise and sidewise the hot water tank 11 and the fuel combustion chamber 12. The top wall 38 of the housing 14 is vertically spaced from the top wall 20 of the hot water tank L1 and the cylindrical side wall 40 of the housing 14 is radially spaced from the cylindrical side Wall 24 of the hot water tank 11, the air heating chamber 30 and the fuel combustion chamber 12. Consequently, there are provided between the top wall 20 of the hot water tank .1 1 and the top wall 38 of the housing 14 an air space 42, and between the cylindrical side wall 24 of the hot water tank .11 and cylindrical side wall 40 of the housing 14 an annular air space 44 with the air space 42 merging into the air space 44. The top wall 38 of the housing 14 comprises an inner shell 46 and an outer shell 48 with thermal insulation 50 in between, while the cylindrical side wall 40 comp-rises an inner cylindrical shell 52 and an outer cylindrical shell 54 with thermal insulation 56 in between. The housing 14 also comprises bottom closure means in combination with the skirt portion 26 below the air inlet opening 32 through the skirt portion 26, which means encloses the annular air space at the normally bottom end thereof. In the embodiment shown the bottom closure means comprises a generally round, pan-like base '58 fastened to downwardly extending support legs 60 and fastened to the bottom end of the cylindrical side wall 40 of the housing I14. The bottom end of the skirt portion 26 rests on the base 58 and preferably is fastened thereto by a suitable connection. The center of the base 56 preferably has an opening 6-2 therethroug-h for the passage of air into the combustion chamber 12. The opening is covered by a floor protection plate 64 within the fuel combustion chamber 12, which plate is spaced from the base 58. It rests on supports 66 extending upwardly from the base 58.
The water inlet and outlet means 15 comprise a cold water intake pipe 68 and a hot water discharge pipe 70. Both pipes are disposed in air tight relationship through openings in the top wall 38, through the top air space 42, and in water tight relationship through openings through the top wall 20 of the hot water tank 11. The intake end of the hot water discharge pipe 71 is disposed in the region of the top wall 20 while the discharge end of the cold water intake pipe 68 is disposed in the region of the bottom wall 22 of the tank 11. Preferably, there is also provided at the bottom of the tank a drain pipe which extends therefrom through the cylindrical side wall 40 of the housing 14 to an exterior drain valve 71 (see FIG. 1).
The air blower means 16 of the space and water heater 10 of this invention are generally mounted on the top drive motor, which casing has an air intake opening 72 disposed outside of the housing 14 of said space and water heater 10, and a pressure air discharge duct 74. The pressure air discharge duct 74 extends preferably in substantially air tight relationship through an opening through the top wall 38 of the housing 14 and into the top air space 42 between the top wall 20 of the hot water tank 11 and the top wall 38 of the housing 14. The internal structure of the air blower means 16 employed in the specific embodiment shown in the drawing is of conventional structure and, therefore, need not be further described herein.
The hot air outlet means 17 comprises the hot air outlet duct 36. This duct extends from the air outlet opening 34 through the skirt portion 26 of the cylindrical side wall 24 and in air tight relationship through a suitable opening in the cylindrical side wall 40 of the housing 14 to the exterior of the housing 14.
The combustion gas vent means 18 comprises a normally straight, cylindrical, heat exchange and vent pipe 78 disposed with its axis substantially coincident with the normally vertical axis A-A of the space and water heater of this invention. The pipe 78 extends downwardly in air tight relationship through the top wall 38 of the housing 14 in water tight relationship through the top wall 20 of the hot water tank 11, through the hot water tank 11, in water tight relationship through the bottom wall 22 of the hot water tank 11, through the air heating chamber and in air tight relationship through the top wall 28 of the fuel combustion chamber 12. Under the concepts of this invention the intake opening 80 of the combustion gas vent pipe 78 is positioned within the fuel combustion chamber 12 and substantially spaced downwardly from the top wall 28 or dome of the fuel combustion chamber 12. One reason for this is to maximize heat exchange between burning fuel in the fuel combustion chamber 12 and the top wall 28 of the fuel combustion chamber 12.
The fuel burner means 19 are centrally disposed in the fuel combustion chamber 12 and preferably are arranged and constructed so as to eject fluid fuel towards the skirt portion 26 surrounding the fuel combustion chamber 12. In the embodiment shown in the drawing, the fuel burner means comprises a gas burner of conventional construction with burner jets 82 being disposed about the circumference of a horizontally disposed, ring manifold 83, the normally vertical axis of which is substantially coincident with the axis A-A of the heating apparatus 10. The burner jets 82 face towards the skirt portion 26 surrounding the fuel combustion chamber 12. The fuel burner means 19 include a conventional, hot Water thermostat 86 (see FIG. 1) mounted on the outside of the housing 14. The thermostate 86 has a thermostatic element (not shown) extending through the side wall of the housing -14 and hot water tank side wall 24 into the hot water tank 11.
The air blower means 16 also comprise an air thermostat 88 mounted on the exterior of the cylindrical side wall 40 of the housing 14 and so mounted at a point thermally remote from the hot air outlet means 17. The air thermostat 88 is electrically associated with the air blower motor, the wiring being disposed within the housing 14. Of course, it is within the concepts of this invention for the operation of the air blower motor to be controlled manually either with or without the simultaneous, automatic control of the air thermostat. Also it is within the concepts of this invention for the air thermostat 88 to be mounted on the wall of the room in which the heating apparatus 10 is located, or elsewhere, rather than on the cylindrical side wall 40 of the housing 14, or to :have in addition to the air thermostat 88 on the cylindrical side wall 40 another air thermostat 88 either in the same room as the heating apparatus 10 or elsewhere, with the two air thermostats being electrically hooked up in parallel to the air blower motor.
Under normal operative conditions, water in the hot water tank 11 is heated by heat from the fuel burner means 19, which heat is conveyed through the top wall 28 of the fuel combustion chamber, the air heating chamber 30 and the bottom wall 22 of the hot water tank 11, and through the combustion .gas vent pipe 78. The temperature of the water in the hot water tank 11 and the operation of the fuel burner means 19 are controlled by the water thermostat 86. When the air thermostat 88 actuates the air blower motor, air is sucked through the air intake opening 72 of air blower and is blown through the air discharge duct 74 into the air space 42 between the top of the hot water tank 11 and the housing 14. The air passes down into the air space 44 about the hot water tank side wall 24, acquiring heat from the hot water tank 11, through the air inlet opening 32 in the skirt portion 26 and into the air heating chamber 30. The air passes through the air heating chamber 30 picking up more heat therein, and then passes through the hot air means 17 into the room in which the combination water and space heater 10 is located. When the space about the heater 10 has arrived at the temperature set by the air thermostat 88, the air blower motor is turned off.
Thus there is provided an improved, combination space and water heater. Not only is the construction improved, but the efficiency is substantially improved. For example, in a gas fired, combinataion water and space heater of the structure disclosed in the Handley patent, wherein the water storage capacity was 30 gallons, the air volume throughput was 101.6 cubic feet per minute, the gas burner input was 24,895 Btu. per hour and hourly recovery (based on a 70% efficient minimum requirement input divided by 1190) was 21 gallons, the warm air output at a selected burner on and off cycle was 4,594 B.t.u. per hour. In a gas fired, combination water and space heater of this invention wherein the water storage capacity was 40 gallons, the air volume throughput was 116.04 cubic feet per minute, the gas burner input was 25,309 Btu. per hour and the hourly recovery was 21 gallons, the warm air output at the same burner on and off cycle was 11,260 B.t.u. per hour. Hence, the heating apparatus of this invention is substantially more efficient.
These and other features, advantages and specific embodiments of this invention will be readily apparent to to those in the exercise of ordinary skill in the art after reading the foregoing disclosures. In this connection, while a specific embodiment of this invention has been described in considerable detail, variations and modifications of this embodiment can be effected without departing from the spirit and scope of the invention as disclosed and claimed.
We claim:
1. An improved combination space and water heating apparatus which comprises:
a hot water tank defined by top, bottom and cylindrical side walls and comprising cold water inlet means and hot water outlet means, said tank having a normally vertical axis;
a fuel combustion chamber defined by top, bottom and cyclindrical side walls, said chamber having a normally vertical axis coincident with said axis of said tank, said top wall being below said bottom wall of said tank and spaced therefrom, the space between said bottom wall of said tank and said top wall of said fuel combustion chamber forming an air heating chamber;
a housing comprising a top wall and a cylindrical side wall surrounding said tank, said housing having a normally vertical axis coincident with said axis of said tank, said top wall of said housing being spaced from said top wall of said tank and said side wall of said housing being spaced from said side wall of said tank, whereby there is provided air space between the top and side walls of said housing and the top and side walls of said tank and at least said side wall of said fuel combustion chamber in the region of said top wall thereof, said air space being in air flow communication with said air heating chamber, said housing further comprising bottom closure means in combination with said side wall of said fuel combustion chamber, which bottom closure means enclose said air space at the normally bottom end thereof;
hot air outlet means in combination with said air heating chamber and comprising a duct disposed through said housing for the passage of hot air from said air heating chamber to outside of said housing;
air blower means in communication with the air space between the top Wall of said tank and the top wall of said housing for introducing air into said air space from outside of said housing;
combustion gas vent means comprising a pipe disposed along said axis through said top wall of said housing, top wall of said tank, said tank, said bottom wall of said tank and said top Wall of said combustion chamber with the intake end thereof being disposed in said fuel combustion chamber and substantially spaced normally downwardly from said top wall of said fuel combustion chamber; and
fuel burner means centrally disposed in said fuel combustion chamber, said means being functionable to eject fuel transversely relative to said axis of said chamber toward said side wall of said chamber.
2. An apparatus according to claim 1 wherein at least normally the bottom side of said top wall of said fuel combustion chamber is arcuate.
3. An apparatus according to claim 2 wherein the normally bottom side of said top wall of said fuel combustion chamber is concave relative to said chamber.
4. An apparatus according to claim 2 wherein both the normally top and bottom side of said top wall of said fuel combustion chamber are arcuate and both the normally top and bottom sides of said bottom wall of said tank are arcuate.
5. An apparatus according to claim 2 wherein the normally bottom side of said top wall of said fuel combustion chamber is concave relative to said fuel combustion chamher, the normally top side of said top wall of said fuel combustion chamber is convex relative to the air heating chamber, the normally bottom side of said bottom wall of said tank is concave relative to said air heating chamber and the normally top side of said bottom wall of said tank is convex relative to the interior of said tank.
6. A heater according to claim 5 wherein said cylindrical side wall of said hot water tank forms the cylindrical side wall of said fuel combustion chamber and of said air heating chamber, and has an opening therein diametrically opposed to said duct, whereby air in the air space between the cylindrical side wall of said housing and the cylindrical side wall of said tank can flow into said air heating chamber.
7. A heater according to claim 6 wherein said housing walls contain thermal insulation.
8. An improved combination space and water heating apparatus which comprises:
a hot water tank defined by top, bottom and cylindrical side walls and comprising cold water inlet means and hot water outlet means, said tank having a normally vertical axis;
a fuel combustion chamber defined by top, bottom and cylindrical side walls, said chamber having a normally vertical axis coincident with said axis of said tank, said top wall being arcuate, below said bottom wall of said tank and spaced therefrom, the space between said bottom wall of said tank and said top wall of said fuel combustion chamber forming an air heating chamber;
a housing comprising a top wall and a cylindrical side wall surrounding said tank, said housing having a normally vertical axis coincident with said axis of said tank, said top wall of said housing being spaced from said top wall of said tank and said side wall of said housing being spaced from said side wall of said tank, whereby there is provided air space between the top and side walls of said housing and the top and side walls of said tank and at least said side wall of said fuel combustion chamber in the region of said top wall thereof, said air space being in air flow communication with said air heating chamber, said housing further comprising bottom closure means in combination with said side wall of said fuel combustion chamber, which bottom closure means enclose said air space at the normally bottom end thereof;
hot air outlet means in combination with said air heating chamber and comprising a duct disposed through said housing for the passage of hot air from said air heating chamber to outside of said housing;
air blower means in communication with the air space between the top wall of said tank and the top wall of said housing for introducing air into said air space from outside of said housing;
combustion gas vent means comprising a pipe disposed along said axis through said top wall of said housing, top wall of said tank, said tank, said bottom wall of said tank and said top wall of said combustion chamher with the intake end thereof being disposed in said fuel combustion chamber; and
fuel burner means centrally disposed in said fuel combustion chamber, said means being functionable to eject fuel transversely relative to said axis of said chamber toward said side wall of said chamber.
9. An apparatus according to claim 8 wherein the normally bottom side of said top Wall of said fuel combustion chamber is concave relative to said chamber.
10. An apparatus according to claim 8 wherein both the normally top and bottom side of said top wall of said fuel combustion chamber are arcuate and both the normally top and bottom sides of said bottom wall of said tank are arcuate.
11. An apparatus according to claim 8 wherein the normally bottom side of said top wall of said fuel combustion chamber is concave relative to said fuel combustion chamber, the normally top side of said top wall of said fuel combustion chamber is convex relative to the air heating chamber, the normally bottom side of said bottom wall of said tank is concave relative to said air heating chamber and the normally top side of said bottom wall of said tank is convex relative to the interior of said tank.
References Cited by the Examiner UNITED STATES PATENTS 2,455,988 12/1948 Fife 126101 X 2,658,502 11/1953 Severance 126-101 JAMES W. WESTHAVER, Primary Examiner.

Claims (1)

1. AN IMPROVED COMBINATION SPACE AND WATER HEATING APPARATUS WHICH COMPRISES: A HOT WATER TANK DEFINED BY TOP, BOTTOM AND CYLINDRICAL SIDE WALLS AND COMPRISING COLD WATER INLET MEANS AND HOT WATER OUTLET MEANS, SAID TANK HAVING A NORMALLY VERTICAL AXIS; A FUEL COMBUSTION CHAMBER DEFINED BY TOP, BOTTOM AND CYLINDRICAL SIDE WALLS, SAID CHAMBER HAVING A NORMALLY VERTICAL AXIS COINCIDENT WITH SAID AXIS OF SAID TANK, SAID TOP WALL BEING BELOW SAID BOTTOM WALL OF SAID TANK AND SPACED THEREFROM, THE SPACE BETWEEN SAID BOTTOM WALL OF SAID TANK AND SAID TOP WALL OF SAID FUEL COMBUSTION CHAMBER FORMING AN AIR HEATING CHAMBER; A HOUSING COMPRISING A TOP WALL AND A CYLINDIRCAL SIDE WALL SURROUNDING SAID TANK, SAID HOUSING HAVING A NORMALLY VERTICAL AXIS COINCIDENT WITH SAID AXIS OF SAID TANK, SAID TOP WALL OF SAID HOUSING BEING SPACED FROM SAID TOP WALL OF SAID TANK AND SAID SIDE WALL OF SAID HOUSING BEING SPACED FROM SAID SIDE WALL OF SAID TANK, WHEREBY THERE IS PROVIDED AIR SPACE BETWEEN THE TOP AND SIDE WALLS OF SAID HOUSING AND THE TOP AND SIDE WALLS OF SAID TANK AND AT LEAST SAID SIDE WALL OF SAID FUEL COMBUSTION CHAMBER IN THE REGION OF SAID TOP WALL THEREOF, SAID AIR SPACE BEING IN AIR FLOW COMMUNICATION WITH SAID AIR HEATING CHAMBER, SAID HOUSING FURTHER COMPRISING BOTTOM CLOSURE MEANS IN COMBINATION WITH SAID SIDE WALL OF SAID FUEL COMBUSTION CHAMBER, WHICH BOTTOM CLOSURE MEANS ENCLOSE SAID AIR SPACE AT THE NORMALLY BOTTOM END THEREOF;
US485297A 1965-09-07 1965-09-07 Combination water and space heater Expired - Lifetime US3269382A (en)

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Cited By (13)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2334060A1 (en) * 1975-12-03 1977-07-01 Stamicarbon Domestic heating system boiler - uses air from inside building for combustion
US4192457A (en) * 1978-08-30 1980-03-11 Easterly Herbert D Auxiliary truck heater
US4242569A (en) * 1978-04-24 1980-12-30 Kayser William M Multiple tank electric water heater
DE3409206A1 (en) * 1984-03-14 1985-09-19 Edgar 5411 Nauort Wiemer Heating device
EP0157893A1 (en) * 1984-04-10 1985-10-16 Dometic Sales Corporation Heating apparatus for a water heating system for small rooms
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
EP0255919A2 (en) * 1986-08-04 1988-02-17 ATI di Mariani Mario & C. s.n.c. Gas-powered water heater
US5361751A (en) * 1993-12-15 1994-11-08 Biggs Robert C Combination hot air furnace and hot water heater
US6109339A (en) * 1996-07-15 2000-08-29 First Company, Inc. Heating system
US20090285567A1 (en) * 2006-11-01 2009-11-19 Searle Bruce R Infrared room heater system
US20120222834A1 (en) * 2011-03-01 2012-09-06 International Thermal Investments Ltd. Shroud for space heater
EP2573497A3 (en) * 2011-09-23 2014-06-25 Finelmo Thermal energy recovery unit, and arrangement for utilizing thermal energy of flue gases
US8955764B1 (en) * 2013-10-24 2015-02-17 Ahmd Abdallah Al-Jassem Qanaei Building heat exchange system

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455988A (en) * 1945-12-14 1948-12-14 Truesdell C Fife Water heater
US2658502A (en) * 1949-09-13 1953-11-10 Harley L Severance Combination water and room heater

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US2455988A (en) * 1945-12-14 1948-12-14 Truesdell C Fife Water heater
US2658502A (en) * 1949-09-13 1953-11-10 Harley L Severance Combination water and room heater

Cited By (15)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2334060A1 (en) * 1975-12-03 1977-07-01 Stamicarbon Domestic heating system boiler - uses air from inside building for combustion
US4242569A (en) * 1978-04-24 1980-12-30 Kayser William M Multiple tank electric water heater
US4192457A (en) * 1978-08-30 1980-03-11 Easterly Herbert D Auxiliary truck heater
DE3409206A1 (en) * 1984-03-14 1985-09-19 Edgar 5411 Nauort Wiemer Heating device
EP0157893A1 (en) * 1984-04-10 1985-10-16 Dometic Sales Corporation Heating apparatus for a water heating system for small rooms
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
EP0255919A2 (en) * 1986-08-04 1988-02-17 ATI di Mariani Mario & C. s.n.c. Gas-powered water heater
EP0255919A3 (en) * 1986-08-04 1989-05-10 Ati Di Mariani Mario & C. S.N.C. Gas-powered water heater
US5361751A (en) * 1993-12-15 1994-11-08 Biggs Robert C Combination hot air furnace and hot water heater
US6109339A (en) * 1996-07-15 2000-08-29 First Company, Inc. Heating system
US20090285567A1 (en) * 2006-11-01 2009-11-19 Searle Bruce R Infrared room heater system
US8467668B2 (en) * 2006-11-01 2013-06-18 Acepower Logistics, Inc. Infrared room heater system
US20120222834A1 (en) * 2011-03-01 2012-09-06 International Thermal Investments Ltd. Shroud for space heater
EP2573497A3 (en) * 2011-09-23 2014-06-25 Finelmo Thermal energy recovery unit, and arrangement for utilizing thermal energy of flue gases
US8955764B1 (en) * 2013-10-24 2015-02-17 Ahmd Abdallah Al-Jassem Qanaei Building heat exchange system

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