US1560377A

US1560377A - Electric air heater

Info

Publication number: US1560377A
Application number: US711122A
Authority: US
Inventors: Harry H Daley
Original assignee: Individual
Current assignee: Individual
Priority date: 1924-05-05
Filing date: 1924-05-05
Publication date: 1925-11-03
Anticipated expiration: 1942-11-03

Description

H. H. DALEY Nov. 3 1925.

ELECTRIC AIR HEATER Filed May 5. 1924 2 Sheets-Sheet l /NVENTOIZ HARRY H. QHLEY. YM ma /W @@@Qmmmmm @@Qmmmmm mmmmmmmm mmmmmmmm @@@mmmmmm @Qmmmmmmm mmmmmmmm mmmmmm@ /46'0 ATToeNE vs.

Nov. 3 1925- 1,560,377

H4 H. DALEY ELECTRIC AIR HEATER Filed May b. 1924 2 Sheets-Sheet 2 F'll5-5.

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NVENTOE HNRRY H. MLEV.

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Patented Nov. 3, 1925.

UNITED STATES HARRY H. D ALE'Y, 0F SAN FRANCISCO, CALH'ORNIA.

ELFETRIC AIB HEATER.

Application led Kay 5,

To all whom t may concern:

Be it known that I, HARRY H. DALEY, a citizen of the United States, and a resident of the cit and county of San F rancisoo, State of California, have invented a certain new `and useful Electric Air Heater, of which the following is a specification.

The invention relates to heaters energized by the consumption of electric current to heat the air in a room or apartment.

An object of the invention is to provide an electric air heater, which not only heats the air in a room, but causes a supply of fresh air to be introduced into the room.

Another object of the invention is to provide an electric air heater which may be used to heat the air within the room or to heat a fresh supply of air being introduced into the room.

A further obiect of the invention is to provide an air heating system comprising a fuel burning furnace in which air 1s heated and from which it is conducted to the room in combination with an electric heater arranged in the conduit extending from the furnace to the room, -so that the room may be heated either by the consumption of fuel or by the consumption of electrical energy and so that the heating of the room may be accomplished with or without the introduction of fresh air into the room. v Another object of the invention is to provide an electric air heater which is positioned below the floor of the room, so that long, vertically disposed flues may be provided, through which a draft of air is induced by the heat derived from the heating unit.

The invention possesses other advantageous features, some of which with the foregoing, Will be set forth at length in the following description where I shall outline in full that form of my invention which I have selected for illustration in the drawings accompanying and forming part of the present specification. In said drawings I have shown two forms of heaters embodying my invention, but it is to be understood that I do not limit myself to such forms, since the invention, as set forth in the claims, may-be embodied in a plurality of other forms.

Referring to said drawings:

Figure 1 is a vertical, longitudinal section through one type of floor heater embodying mv invention.

Figure 2 is a cross section taken on the line 2 2 Figure 1.

1924. Serial N0. 711,122.

Figure 3 is a vertical section through a wall type heater.

Figure 4 is a diagrammatic representation of the combined electric heater and fuel combustion heater forming the heating system of my invention.

The heater of my invention may be embodied in a floor heater or a wall type heater. In a floor heater, the heating units are arranged in a shell below the floor and the floor is provided with an overlying grille through which the heated air ascends into the room. In the wall t pe heater, the grille is arranged in the wa l at or adjacent the floor and the air heated by the heating unit passes into the room through the grille.

One of the features of the heater of my invention is the provision of means for introducing fresh air from the outside atmoslphere into the heater shell so that, when the eater is in operation, warmed, fresh air is continually being brought into the room. The majority of electric heaters merely serve to circulate and warm the airwhich is already in the room, thus causing the room to become close and stuffy, Whereas with the heater of my invention, fresh air is being continually introduced into the room. I prefer to arrange a damper or other control means between the heating unit and the conduit through which air is supplied to the unit, so that the heater may be used either to circulate and heat the air within the room or to induce a supply of warm, fresh air into the room. The conduit through which the air is supplied to the electric heater, may be the distributing conduit, or one of the distributing conduits, for the fuel burning furnace, so that one conduit may serve to distribute the heated air from the furnace and also to supply fresh air to the electric heater. It is not believed that it will be advisable to operate the furnace and the heater at the same time but the conduit will serve as a means of either distributing the heated air from the furnace or supplying the electric heater with fresh air.

The heater shown in Figures 1 and 2, which is a ioor ty e heater, comprises an outer shell 2 prefera ly made of sheet metal, which is supported below the level of the Hoor 3. The shell is closed at the top by a grille 4, the upper surface of which is flush with the surface of the loor. Opening into the outer shell, adjacent the bottom thereof, is a conduit 5 which is connected either directly to the external air or which connects to the outside of the house through the air heating furnace. Arranged within the outer shell is an inner shell having side walls 6 which are spaced away from the side walls of the outer shell, to provide a heat insulating air chamber. The bottom of the inner shell 6 is open to permit the ready passage of air from the outer shell to the inner shell. In the present construction, the bottom consists of a plurality of parallel metallic strips 7, which are spaced apart to permit the passage of air. Mounted on the bottom of the inner shell are a plurality of vertically disposed tubes or muiles 8 which are open at the top and bottom to permit the passage of air therethrough. Arranged on each mule is a heating element 9, the mulie being preferably made of refractory material to withstand the temperature of the heating element. The muille and the heating element arranged thereon constitute the heating unit. The muflle 8 is preferably provided with a wedge shaped upper edge 12 so that dust and other particles falling through the grille will not lodge on the muiile but will be directed through to the outer shell. Surrounding each muflle are

twocylindrical lues

13 and 14, open at the to and bottom to permit the circulation o air through the spaces between the inner flue 13 and the mulie and between the two

lues

13 and 14. The heat generated in the heating element 9, causes a draught of air upward through the vertically disposed mulle 8 and also a draught of air upward through the annular space between the mufe and the inner flue 13. This inner flue 13 will become heated and will induce a draught of air through the annular space between the

lues

13 and 14, thus causing the movement of relatively large amounts of air through the heater, so that the air is not raised to a deleteriously high temperature. The

flues

13 and 14 may be made of metal or of refractory material or of any other suitable material.

In Fi re 3 I have shown my invention as embo ied 'n a wall type heater. In this heater the grille 24 is disposed in the wall 25 adjacent the floor 3. Arranged in the wall and extending downward below the level of the floor 3 is an outer shell 22 which opens into the room through the grille 4. Opening into the outer shell at the bottom thereof is a conduit 5 which may extend directly to the outside air or to the outside air through the fuel burnin furnace. Means are provided for controlllng the admission of air into the shell through the conduit 5, this means comprising a damper 28 suitably connected to a control button 29 arranged 1n the wall adjacent the grille. By moving the button 29, the damper may be closed or opened or arranged in any desired adjusted position. Disposed within the oter shell 22 is an inner shell having side walls 26 which are spaced from the side walls of the outer shell to form an air insulation chamber. The bottom of the inner shell comprises a plurality of spaced strips 27 and mounted on the bottom is a vertically disposed hollow muflle 31 on which is arranged a heating element 32. Surrounding and spaced from the muiile 31 is an open ended flue 33 of metal or refractory material which is spaced from the flue and from the side walls of the inner shell. The heat produced in the heating element 32 causes a draught of air upward through the mule 31 and upward through the annular space between the mulle and the flue 33. When the damper 28 is open, there is also an upward flow of air through the space between the side walls 26 and the flue 33 and this air is slightly warmed due to the heat imparted to the flue by radiation by the heating element. When desired, the damper 28 may be closed and the supply of fresh air to the shell cut ofi. The heat of the heating element 32 will cause a draught of air upward through the muiile and through the flue 33 and this air is supplied from the room and passes downward in the space between the flue 33 and the shell and then passes upward through the flue and the muiHe. In this way, the heater may be used to circulate and heat the air in the room or to heat and induce a supply of fresh air into the room.

By extending the shell 22 downward below the level of the floor, I am enabled to use a long muile and long flue, without employing a large rille, so that I obtain the draught effect oir the long muille and flue with the advantageous circulation of air caused thereby. The outer shell 22 is disposed between the joists of the Hoor and occupies room which at the present time is unoccupied in substantially all building structures.

In Figure 4 I have shown the air conduit 5 extending from the fuel burning furnace 34 to the shell 22. Fresh air is introduced into the heating chamber of the furnace through the conduit 35, which usually extends to a point outside of the house and such cold air enters through the conduit 35 and passes through the furnace, wherein it is either warmed or not, depending on whether or not the furnace is in o eration, and thence passes through the con uit 5 to the shell 22 whence it discharges into the room. When a quick heat is desired the fuel burning furnace and the electric heater may be operated simultaneously, but ordinarily only one of the heating devices will be operated at one time.

I claim:

1. In an electric air heater, a shell openlng into the room to be heated, an electric heating unit in said shell, a vertically disposed ilue open at the top and bottom surrounding the heatin unit and spaced from ythe unit and the wa ls of the shell whereby ing element on said tube, a vertically disposed tube open at the top and bottom snrrounding the tube and spaced from the tube and the walls of the shell and an air supply conduit connecting the shell with the atmosphere external to the room.

3. In an electric heater, a shell opening into the room to be heated, a vertically disposed tube open at the top and bottom disposed within said shell, an electric heating element on said tube, a vertically disposed flue open at the top and bottom surrounding the tube and spaced from the tube and the walls of the shell, an air supply conduit `connecting the shell with the atmosphere external to the room and a damper for controlling the fiow of air through said conduit.

4. In an electric air heater, an outer shell, an inner shell spaced from the outer shell and opening into the room to be heated, a vertically disposed open ended tube disposed in the inner shell, a heating element on said tube, a vertically disposed ue surrounding and spaced from the tube and spaced from the walls of the inner shell, means for supplying air from a source external to the room to the innervshell and means for controlling the supply of air to the inner shell.

5. In an electric air heater adapted to heat the air in a room, a grille arranged in the wall of the room at the floor, a shell disposed behind said grille extendin above and extending downward below the evel of the.

floor, an electric heating unit arranged in the downwardly extending portion of the shell, and means for passing a1r upwardly through said shell.

6. In an electric air heater adapted to heat the air in a room, a grille arranged in the wall of the room at the floor, a shell disposed behind said grille and extending downward below the level of the floor, a vertically disposed open ended tube arranged in the downwardly extending portion of the shell, a heating element on sald tube, a vertically disposed open ended lue surrounding and spaced from the tube, and an air conduit connected to the bottom of said shell.

7 In an air .heating system for a room, comprising a fuel burning furnace, a conduit for conducting the heated air from the furnace to the room, and an electric heater in said conduit adjacent its inlet to the room.)

8. An air heating system for a room comprising a fuel burning furnace ada ted to receive and heat external air, a con uit for conducting the heated air to the room, an electric heater in said conduit adjacent its inlet to the room and means for controlling the flow of air'through the conduit to the electric heater.

9. An air heating system for a room, comprising a shell opening into the room, an electric heating unit in said shell, a fuel burning furnace adapted to heat air and a conduit connecting the furnace with the shell. Y

10. An air heating system for a room, comprising a shell opening into the room, an electric heating unit in said shell, a fuel burning furnace adapted to heat air, a conduit connecting the furnace with the shell and a damper for controlling the flow of air from the conduit into the shell.

11. An air heating system for a room, comprising a shell opening into the room, an electric hea-tin unit arranged in the shell, a vertically isposed flue surrounding and spaced from the heating unit and spaced from the walls of the shell, whereby air may circulate within the shell past the heating unit, a fuel burning furnace adapted to heat air, a conduit connecting the furnace with the shell and a damper for controlling the flow of air from the conduit into the shell. f

In testimony whereof, I have hereunto set my hand.

HARRY H. DALEY.