US1849396A

US1849396A - Air heater

Info

Publication number: US1849396A
Application number: US437737A
Authority: US
Inventors: Baetz Henry
Original assignee: Individual
Current assignee: Individual
Priority date: 1930-03-21
Filing date: 1930-03-21
Publication date: 1932-03-15
Anticipated expiration: 1949-03-15

Description

H. BAETZ AIR HEATER March 15, 1932.

Filed March 21. 1930 AVWZA/T P: HENRY 6A 6715.

Patented Mar. 15, 1932 HENRY BAETZ, OF ST. LOUIS, JVIISSOURI AIR HEATER Application filed March 21, 1930. Serial No. 437,737.

My invention has relation to improvements in air heaters and it consists in the novel features of construction more fully set forth in the specification and pointed out in the 5 claims.

The object of the present invention is to provide a radiator that may be embodied in an air heater, said radiator comprising a heating element adjacent to the surface of which is fixed an extended radiator surface in contacting relation, and having channels, or

passage-ways, for conducting air. The air is, of course, divided into streams by virtue of the shape of the extended surface and these streams are confined between the heated channel walls of the extended surface throughout the entire period that they are passing through the casing. Thus, a decided advantage in efficiency is gained over the type of extended surface now commonly in use,

(namely, fins or spines projecting from the heating elements, such as radiator coils) and a heater of my design is capable of radiating the same amount of heat as an old type of heater considerably larger in size. A further object is to provide a heater of high efliciency by a comparatively simple method of construction. These advantages as well as others will be better apparent from a detailed 5 description of the same in connection with the accompanying drawings, in which Fig. 1 is a combined side elevation and vertical section of the heater; Fig. 2 is a front elevation with part of the front wall broken away; and Fig. 8 is a fragmentarily detail showing how the extended surface between the heatin elements may be arranged in contacting relation with said elements.

Referring to the drawings showing my improved radiator embodied in a unit heater, represents the heater casing comprising a medial cylindrical part 1 and

conical end walls

2 and 3, the former having a flanged air inlet opening 4 in which operates a fan 5 mounted on motor shaft 6 of the motor 7 carried in a supporting spider 8 fixed to the flange 4. The conical wall 8 has an air outlet opening 9 also defined by a flange 10 to which may be connected a hot air distribution pipe if desired. A plurality of heating elements in the formof

hollow rings

11, 12, and 13 are concentrically arranged within the medial part 1 of casing C which elements'are connected by several (in the presentinstance four) series of

nipples

14, 15 and 16, th

outer nipple 14 of which projects beyond the wall land has its end screw-threaded to receive either a cap 17 or steam pipe 18. There will, of course, be a steam pipe 18 connected to each of two of the pipes 14 (as shown) one of which will serve as the steam inlet and the other as the condensation outlet. The two pipes 14 not in use either as inlet or outlet are closedby caps 17. It is apparent from an inspection of the drawings that steam enter ing any of the pipes 14 will traverse the heating element 11 from which ill] -will pass through pipe 15 to heating element 12, thence through pipe 16 to heating element 13, and the water of condensation discharges in a reverse manner through

pipes

16, 15, and pipe 114, that is utilized as the condensation out- At the center of the casing C is a hollow drum 19 having its end adjacent to the fan 5 closed by a conical cap 20, the wall of said drum being suitably spaced from the heating element 13. The heating element 11 is also spaced from the casing wall 1, and into each of these spaces is arranged extended heating surface. This extended heating surface consists of fluted or zig-zag

heat conducting elements

21, 22, 23 and 24 each of which is bent fromthin, springy sheet metal so that the fluting is of proper size to allow the elements to be forced into the spaces between heating elements and hold themselves in place by the inherent tension in the material.

The loops (5 of thefiuted conducting ele- 'ment provide channels 6 and c for thepassage of air which is heated by contact with thehot walls of said loops and radiator surface. Obviously, the contacting of the extended surface with the radiator surface along the many lines indicated at d (Fig. 3) conducts the heat from the radiator surface to every part of the extended surface.

If desired, I may build a single radiator embodying the principles of the invention, in which case a heatingelement is arranged.

in spaced relation with a supporting or confining wall, and into this space between the surface of the heating element and confining wall is forced the metal fiuting for forming 5 the channels for a flow of air.

A radiator so constructed is simple, capable of low costmanufacture, and possesses high efiiciency.

Having described my invention, I claim:

1. In a radiator, heat conducting elements adjacent to the radiator "surface, "said elements comprising zig-zag or fluted sheetsof springy material providing channels for con fining air streams, a supporting wall for sa-id sheets disposed in fixed spaced relation and parallel with the radiator surface, one end of each element bearing "against the radiator surface and the opposite end of :each element against the supporting wall.

2. An .air heater comprising a casing, means for moving air through said casing, :a heating element within the casing and spaced therediro'm, Lhea't conducting elements comprising corrugated members disposed be- :tween the casing :and heating element, said corrugated members having channels, the bounding walls of which are confined by their inherent expansive property between the surface of the heating element and the casing.

L3. Aniair heater comprising a circular cashaving an air inlet and air outlet, means for z=moving :air through the casing in paths substantially parallel with the longitudinal axis thereof, "a plurality of annular heating elements iconeent-ri'cally disposed in spaced relation within the casing, and heat iconducting elements arranged between the heating elements :and having channel passages for 40 theflowota-ir.

4;. An air heater comprising a circular casinghaving an air inlet and an air outlet, means for moving air through the casing in Epaths substantially parallel with the long-itudinal axis thereof, and an annular heating element disposed withinsaid casing in parallelism with and spaced :from the wall thereof, a heat conducting "element arranged between the heating element "and the casing, said conducting element comprising a fluted sheet of springy material to provide air passages through the casing and held in place by its expansive force exerted against the casing amd heating element.

.In testimony whereofl vhereunto aflix signature.

HENRY BAETZ.