US1658198A - Air heater - Google Patents

Description

Feb. 7, 1928. 1,658,198 J C. HOSCH AIR HEATER Filed Sept. 7, 1926 2 Sheets-Sheet 1 T ql k z I l N V E N TO R Z J C/m/o c Hosch BY 'fi a/wd ATTOR N EY Feb. 7, 1928. 1,658,198

' I I J C. HOSCH AIR HEATER Filed Sept. 7. 1926 2 Sheets-Sheet 2 IN V E NTO R J C/qud Host-b BY ATTORNEY Patented Feb. 7, 1928.

PATENT OFFICE.

J cumminoscn, or Losmcnms, canmonm AIR HEATER.

Application filed September'l, 1926. Serial No. 133,988.

This invention relates to heaters, and more particularly to air heaters that serve to provide a large current of heated air to a space to be'warmed.

Such heaters have been used in the past for lar e buildings, such as churches, theatres, c ubhouses and the like; Usually a fan is used to induce a draft of air that is to be warmed by the heater, and to pass the heated air into the space to be heated. Such heaters of the prior art were not only expensive to manufacture, but were also dif-' ficult to install.

It is one of the objects of my inventioni to provide a compact, eflicient heater of inexpensive construction.

It is another object of my invention to make it possible to assemble the heater parts pact. j My invention -possesses many other advanta es, and has other objects which may in a convenient and rapid manner.

In order to accomplish these objects, I provide a heater utilizing fluid fuel, such as gas or vaporized oil, in which there are a plurality of fuel. burners, each of which utilizes a forced draft to send the products of combustion through conduitsthat are heated by said products. are placed in the path of the draft of air to be'heated, whereby there is a large heat transfer. It is accordingly still another object of my invention to provide a heater in which heat is imparted to. heater conduits directly from the products of combustion. The advantage of such an arrangement is that, the conduits serving the double purose of carrying} off the products of comustion as well as of imparting heat to the air, the entire heater can be made very combe ma c more easily apparent from a consi cration of one embodiment of my invention. For this urpose I have shown a form in the drawings accompanying and forming part of the present application. I shall now roceed to describe this form in detail, which illustrates the general principles of my invention; but it isto be understood that this detailed description is not to be taken in a limiting sense,- since the scope of my inven tion is best defined by the appended claims.

Referring to the. drawings: a

E Figure I is a diagrammatic view of a These conduits in turn.

Fig. 6 is a further detail showing another feature of construction.

In Fig. 1 only a part of a building to be heated is disclosed. A ceiling 11 is shown, above which the heater installation is rovi ded, the convection currents pf heate air being forced through the grille or opening 12. Clean air is takenfrom the outside of the building through louver 13. The heater 14, in this'instance shown as substantially rectangular, can be placed adjacent the louver 13, so that the air coming in therethrough is heated, and is forced through the heater by a fan located in casing 15. This fan is shown as belt driven from a small motor 16, and serves to produce an effective. draftof air through the openings 12. 'There may or may not be exhaust openings at points distant from grille 12; and since in general the broad idea of circulating heated air through a space is now well-known, further detailing is considered unnecessary.

The heater 14 is of box-like form, open at those sides which are respectively adjacentthe louver 13 and the fan encased in a frame 15. Disposed in the box-like space, and over which the air from louver 13 must pass, are a series of convoluted horizontal conduits 17, 18, and 19. These conduits are formed of steel or iron tubing, and serve to conduct the products of combustion to stacks 20, 21, and 22, respectively. In order mentof conduits 17, 18, and 19. As shown most clearly in Fig. 4, these three conduits form a vertical'series, one above the other.

The topmost conduit 17 for example, extends through the side of the heater 14 at 25 (Figs. 1 and 3), whence it has a horizontal portion extending almost to the other side of the heater. It is thisfirst section in which the fuel burner 26 extends, to which fuel, such as gas or vaporized oil is fed as from a' valved ipe 27. A spark plug 28 placed adjacent t e burner opening is used to ignite the fuel in this conduit section. A burner guard 29 can also be placed about the front .end of the burner in the form of a projection; and the burner itself can be supported in any appropriate fashion at the opening 25 of conduit 17.

Since it is this first section of conduit 17 i that is subjected to the most intense heat, it

"slightly 'above this first section, and to that side at whichburner 26 is supported; thence there is a downward dip 33 (Fig. 3) leading to another horizontal section. 35 at about the same level as the first section, and extending across. the heater. Finally there is an upward rise 36, connectingto the last section 38, to which stack 20 connects. It is thus seen that the conduit 17 progresses from side to side of the heater, the successive horizontal portions being slightly displaced vertically from the preceding horizontal portion. In this way, itis ensured that air from louver 13 will pass intimately around all portions of the conduit and will be heated thereby.

Since the flame from heater .26 projects horizontally and since the products f combustion must also pass through lon horizontal passageways to which these products impart heat, I find it advantageous to supply'aforced draft,as by pipe 39 connected to a blower 40 and surrounding the burner 26. The blower also assists in roviding Slll'fiClGIlt air for complete combustlon of the fuel, andby the aid of pipe 50, to impart forced draft to the upright flues.-

The conduits 18 and 19 are entirely simi 15111111 structure to conduit 17 just detailed; but they are placed at successively lower levels. Each has its burner 41 and 42 respectively supplied from the same source of fuel as burner 26.

It is to benoted that. the air coming through louver 13 impinges first on the tions.

and as it pro resses through the heater, it

adually strlkes hotter portions until it.

ally passes over that section in which the burner flame is produced. In this way, the temperature of the air is more uniformly and evenly raised. Furthermore, this cool air takes up' the heat from those sections which are active in the stacks;.and this is done efliciently on account of the large temperature difference between these sections and the air. The net result, is an increase in stack efliciency due to decrease in stack heat.

The conduits 17, 18 and 19 are housed, as hereinbefore mentioned, in a box-like structure, the wall construction of which is most clearly illustrated in Fig. 5. Of course, that side of the casing adjacent louver 13, as well as the opposite side, is open to permit air to travel through the heater; but the top and bottom and the other two sides are walled by panels that are fastened to the four corner pieces 43 (Fig. 2). These corner pieces may be angle irons. The construction of the walls is double. The panels '44 are shown as joined together with tongueand-groove joints; one edge of each panel being formed with a tongue such as 45,

which is adapted to fit into a cap 46 form-"9' mg a groove 47. This cap fits between the walls 48 of the adjacent panel .44, and

serves to retain heat insulation 49, such as featherstone, in place. The cap is welded in place after the insulation is packed between the'walls of the panel.

The panels 44 can be shipped com actly and can be fastened to the corner ang es 43 at the scene of installation.

I claim: 1. In a heater, a box-like structure having an open .front and back, means for causing air to pass through saidstructure by way of said open front and back, a convo-. luted conduit extending across the structure in. the path of the an, said conduit having a plurality of horizontal sections, and

cooler parts of the conduits 17, 18, and 19;

a horizontally arranged burner projecting into the end of one of the horizontal sec- 2. In a heater, a box-like structure having an open front and back, means" for causing air to pass through said structure by way of said open front and back, a convoluted conduit having a series of horizontal sections at diflerent levels extending across the structure in the path of the air, a horizontally arranged burner projecting Into the end of one of the sections.-

3. In a heater, a plurality of horizontally arranged burners, said burners forming a vertical series, a plurality of convoluted, substantially horizontal conduits, one for each burner, the burner associated with each conduit projecting into one end thereof, said conduits serving to carry ofi the products of combustion, and means for moving air over the conduits.

4. In a heater, a box-like structure having an open front and back, means for causing air to pass through said structure by way of said open front and back, a plurality of convoluted conduits,each having'a series of horizontal sections at different levels extending across the structure in thepath of the air, said conduits being arranged one over the other, and a horizontally arranged burner for each conduit,- projecting into the end of-the associated conduit. v

5. In a heater, a horizontally arranged burner, a convoluted, horizontal conduit for leading off the products of combustion and encompassing the burner, said conduit having a plurality of horizontal series sections, and means whereby that section in which the heaterlis disposed can be disconnected from the other sections.

6. In a heater, a substantially horizontal conduit, a fluid fuel burner extending into one end of the conduit, said conduit having convolutions for carryingbff the products of combustion, and means for. passing air around said conduit for heating it, the air passin first around that portion of the conduit which is most remote from the burner. 7. In a heater, a substantially horizontal conduit, a fluid fuel burner extending into one end of the conduit, said conduit having" convolutions for carrying off the products of combustion means for passingair around said conduit for heatingit, the air passing first around that portlon of the conduit which is most remote from the burner, a vertical stack connecting to said conduit, and means ,for applying a forced draft to the vertical stack.

8. In a heater, a casing having enclosing I the casing and connected to the other end ofthe conduit, and a fan arranged adjacent the burner end of the casing for draws ing air theret-hrough.

J 9. In a heater, a casing having open ends,"

lattice frameworkadjacent each of.the sides of said casing a horizontal conduit supported on said framework so as to extend across the casing, a fluid fuel burner extendinginto one end-of the conduit, and a stack in communication with the other end.

10. Ina heater, a box-like casing, said at the fan end, a stack for each of the con duits adjacent the louver end, and a blower for providing air around the burners and for providing a forced draft in the stacks.

In testimony whereof I have, hereunto set m hand.- r y J CLAUDE

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