US2580492A

US2580492A - Air-heating appliance

Info

Publication number: US2580492A
Application number: US24820A
Authority: US
Inventors: Jr Blaine Clyde Watts
Original assignee: KRESKY Manufacturing CO Inc
Current assignee: KRESKY Manufacturing Co Inc
Priority date: 1948-05-03
Filing date: 1948-05-03
Publication date: 1952-01-01
Anticipated expiration: 1969-01-01

Description

Jan. 1, 1952 B. C. WATTS, JR

AIR HEATING APPLIANCE Filed May 3, 1948 2 SHEETS-SHEET 1 INVENTORT BLAINE CL V05 WATTS, JR.

, ATTORNE).

J an. 1, 1952 B. c. WATTS, JR 2,580,492 AIR HEATING APPLIANCE Filed May 3. 1948 2 SHEETS-SHEET 2 fig? . INVENTORY BLAINE CLYDE WATTS} JR.

ATTORNEK Patented Jan. 1, 1952 AIR-HEATING APPLIANCE Blaine. Clyde Watts, Jr., Petaluma, Calit .,asslgnor to Kresky Mf g. (30., Inc., Petaluma, Calif., a

corporationof California Application May 3, 1948, Serial No. 24,820

d Claims. (Cl. 126-110) 'lhislinvention relates to heater appliances and more particularly to an improved heater appliance inthe nature of a floor furnace or space. heater. A principal difficulty in the manufacture and installation of floor furnaces, particularly of the typeadapted to circulate heated air from both sides of a building wall, resides in the difficulty of maintaining the top panel of the furnace housing coolespecially that part of the housing in contact with the wall in which the furnace is positioned. Inasmuch as the heated air travels upwardly within the furnace housing toward the top thereof the problem of: cooling the top satisfactorily and practically has gone long unsolved.

An object of the present invention is to provide means in a heater appliance to cool parts of the housing thereof by drawing in cold air, by means of a circulationinducing mechanism, below the top of r the housing and above the warm air outlet of said furnace. s -It is a further object of the present invention to .cool the top panel of a floor furnace with cold air. A further object of the present invention is to maintainthe top panel of a floor furnace cool by-means of channeling cold air thereunder and which said stream of cold air is subsequently discharged from the furnace as heated air. Thus -i;hecold air utilized to cool the'top panel of the floor-furnace is'preheated prior to contact with the heating elements of the furnace unit.

A further object of the present invention is to provide a heater appliance of the character .panel ofsaid furnace .is maintained in a cool condition during'operation of the furnace.

- A furtherobject of-the present invention is to provide an improved floor furnace wherein hazard from fire caused by overheating ofparts of said furnace is effectively Further objects and advantages of the invention will become apparent upon referring to the accompanying drawings and specification in which similar characters of reference represent corresponding parts-in -the several views.

Fig. l is a perspective view of a dual outlet type iioor furnace with portions thereof broken away.

Fig. 2 is an end elevational view of a dual outlet floor furnace installed in a building wall and showing the building floor and building wall in section.

Fig. 3 is a sectional view taken on line 3-3 of Fig. 2.

Fig. 4 is a sectional view taken on line 4-4 of Fig. 1.

Referring now to the drawings the floor furnace comprises an outer casing or housing 2 enclosing a burner unit (not shown). The type of burner unit generally utilized is of the forced draft type and a part of the burner construction is indicated at 3. The floor furnace illustrated herein is of the character adapted to be installed in a building wall and wherein heated air is emitted therefrom on both sides of the wall.

Fig. 2 illustrates an installation of the present type burner and wherein the outer casing 2 is illustrated as below the building floor indicated at 4 and 5 while the wall is illustrated at 6. A furnace'head generally indicated at I is positionedabove the furnace outer casing 2. Warm air outlets are provided in opposite sides of the head I longitudinally thereof and are preferably provided with louvers 8. Disposed within the head I is an inner head or shell, generally indicated at H), provided with imperforate end portions 9 spaced inwardly from the ends H of the furnace head I. The shell is provided with an imperforate substantially trough shaped top member [2 spaced below the imperforate top panel I3 of the furnace head in order to form a cold air passageway or duct between said member 12 and said panel l3. Each end ll of the head I isprovided with a plurality of spaced cold air inlet apertures I4 arranged on each side thereof to enable communication from atmosphere to said cold air duct. When the furnace is installed in a wall the apertures M are positioned on opposite sides of. the wall as indicated clearlyin Fig. 2. The cut-out portion of the wall 6 ln'which the furnace is dlsposedlies over and in contact with the top panel l3, and the ends of the head and the apertures l4 are arranged on opposite sides of said wall.

The casing 2 is partitioned vertically as at 20 to form a cold air inlet flue 15 at one end of the said casing. Usually the end of the casing in which the air inlet flue is positioned is opposite the burner unit 3 and blower 3 A circulation inducting mechanism indicated as a power fan H5 is disposednear the bottom of the casing 2 in made possible by the present invention. noted that the cold air duct formed by the imcold air inlet fiu-e 15 in registry with an aperture I! in communication with the space surrounding air heating elements l8 and !9 adjacent the bottoms thereof, and which said elements are heated by a burner unit (not shown) by conveying the hot gases of combustion from the burner unit therethrough to a chimney outlet attachment flange 3|. Air entering through aperture l! is heated by contact with elements i8 and I9 and is then discharged from the head 7 through the warm air outlets. A vertical partition 21 is provided in the head between an end 9 of the inner head and the adjacent end H of the outer head 1 above the circulation inducing fan 16. The vertical partition 2|, disposed between louvers 8, serves to direct air enteringrounding said air heating element, warm air outlets in the side walls of said outer head, an inner head comprising a top and end walls positioned within the outer head and spaced inwardly therefrom to form a cold air duct between the tops of said inner and outer heads, and spaced apertures in an end wall of said outer head in communication with atmosphere and one end of said cold-air duct, said cold air duct at its other end being in flow communication with the upper .end of said cold air inlet flue.

2. A heating appliance comprising an outer casing, a head comprising top, side and'end walls disposed over said casing and in now commuthrough louvers 8 downwardly toward fan l6 for circulation.

Cold air is drawn into the furnace unit through apertures l4 disposed at opposite ends of the head, and cold air enteringfrom the-end of the furnace farthest removed from .the fan I6 is conducted through the duct formed by top panel l3 and member [2 to thus cool and maintain cold said top panel [3 which would otherwise be heated directly by contact with the heated air rising from contactwith the heating elements 3 and IQ for discharge through the Warm air outlets provided in said furnace head. It might here be further noted that the spaces between the ends 9 and the ends II are filled with cold air entermg through apertures l4, and thus the endsof said head I are maintained in a cool condition during operation of the floor furnace. Careful experiment has indicated that without the provision of the cooling duct formed by member i2 and panel IS the temperature of the panel 13, formed of metal, during, operation of the furnace approximates 90 F, above room temperature, Whereas when the same furnace is equipped with the cooling duct, as herein described, the temperature of said top panel approximates only F. above room temperature.

Figs. 1 and 2 illustrate by means of arrows A the flow of cold air through the cold air duct and into the cold air inlet flue of the furnace while arrows B indicate the flow of hot air and serve to illustrate the desired C001il'1g function It is perforate ends 9, ends I I and members l2 and I3 is not in flow communication with the heated air arising fromcontact with the heater elements in the furnace casing.

While the invention has been described in spevention within the spirit of, the invention and scope of the appended claims.

I claim:

1. In a heating appliance, an outer casing, an outer head comprising top, side and end walls disposed oversaid casing and in flow communication therewith through the bottom thereof and adapted to project from a floor into a cut-out portion of a building wall to expose the side walls of the head on opposite sides of the building walls, an air heating element in said casing and means to heat said element said elementbeing disposed below-the bottom of said outer head, means forming'a vertical cold air inlet fiuein and adjacent to one end said casing and in commumcation at its lower end with the space surbelow the bottom of said head, means forming a vertically disposed cold air inlet flue in said casing in communication adjacent to its lower end with the space surrounding said air heating element, a warm air outlet in a side wall of said head, a member comprising a top and end walls positioned within said head and spaced therefrom to form a cold air duct between the tops of said member and said head, and apertures in an end wall of said head in communication with atmosphere and said cold air duct, said cold air duct being in flow communication with the upper end of said cold air inlet flue at a point substantially removed from said apertures in said head.

3. A heating appliance comprisingvan outer casing, an outer head comprising top, side and end walls disposed over said casingand in flow communication therewith,v enclosed air heating elements in said casing and means to heat said elements, said elements being disposed below the bottom of said outer head, means forming a vertically disposed cold air inlet flue in said casing adjacent to one end thereof and in flow communication at its lower end with the space surrounding said air heating elements, means to induce circulation of cold air from said cold air inlet flue toward said air heating elements, a warm air outlet in the side walls of said outer head, an inner head comprising a top and end walls positioned within said outer .head and spaced inwardly therefrom to form a horizontally disposed cold air duct between the tops of said inner and outer heads, and apertures in the end .walls of said outer head in communication with atmosphere and said cold air duct, one end of said cold air duct being in flow communication with the upper end of said cold air inlet flue. 4. A heating appliance comprising an elongated outer casing, a head comprising top, side and end walls disposed over said casing and in flow communication therewith, an air heating element in said casing and means to heat said element, said element being disposed below the bottom of said head, means forming a vertically disposed cold air inlet'flue in said casing at one ,end thereof and inflow communication at its lower end with the space surrounding said air heating element, means to induce circulation of cold air from said cold air inlet flue toward said air heating element, a member comprising a top and end walls positioned in said head and spaced inwardly therefrom to form a horizontally disposed cold air duct between said tops of said member and said head and longitudinally of said head, and an aperture in the end wall of said head farthest removed from said cold air inlet flue in communication with atmosphere and one end of said cold air duct, the other end of said cold air duct being in flow communication with the upper end of said cold air inlet flue.

5. A heating appliance comprising an outer casing, an outer head comprising top, side and end walls disposed over said casing and in flow communication therewith through the bottom thereof, an air heating element in said casing and means to heat said element, said element being disposed below the bottom of said outer head, means forming a vertically disposed cold air inlet flue in one end of said casing and extending substantially from top to bottom thereof and in flow communication at its lower end with the space surrounding said air heating element, means in said cold air inlet flue to induce circulation of cold air therefrom toward said air heating element, warm air outlets provided in opposite side walls of said outer head, a member comprising a top and end walls positioned in said outer head and spaced inwardly therefrom to form a cold air duct between said tops of said member and said head, the top of said member being disposed above said warm air outlets, and,

spaced apertures in the end wall of said head farthest removed from said cold air inlet flue, said apertures being in communication with atmosphere and one end of said cold air duct, the other end of said cold air duct being in flow communication With the upper end of said cold air inlet flue.

6. A heating appliance comprising an elongated outer casing, an elongated outer head comprising top, side and end walls disposed over said casing and in flow communication therewith, an air heating element in said casing and means to heat said element. said element being disposed below said outer head, said casing having a vertical partition arranged to form a vertically disposed cold air inlet flue in one end of said casing and an aperture in said partition adjacent to the bottom thereof to enable flow communication from said flue to the space surrounding said air heating element, means in said cold air inlet flue to induce circulation of cold air therefrom toward the bottom of said air heating element, warm air outlets provided in said outer head on opposite sides thereof, an inner head comprising a top and end walls positioned in said outer head and extending substantially from end to end thereof and spaced inwardly therefrom to form a horizontally disposed cold air duct therebetween, and spaced apertures in the end Wall of said outer head farthest removed from said cold air inlet flue, said apertures being in communication with atmosphere and one end of said cold air duct, the other end of said cold air duct being in flow communication with the upper end of said cold :air inlet flue whereby cold air entering through said spaced apertures is conveyed through said cold air duct to said flue and thence for contact with said air heating element.

BLAINE CLYDE WATTS, JR.

REFERENCES CITED The following references are of record in the flle of this patent:

UNITED STATES PATENTS Number Name Date 497,345 Rogers May 116, 1893 2,055,926 Fraser Sept. 29, 1936 2,430,393 Elmore et a1 Nov. 4, 1947