US3688759A

US3688759A - Outer building wall air heating device with a heat exchanger

Info

Publication number: US3688759A
Application number: US86717A
Authority: US
Inventors: Arnold Van Der Goot
Original assignee: Individual
Current assignee: Individual
Priority date: 1969-11-14
Filing date: 1970-11-04
Publication date: 1972-09-05
Anticipated expiration: 1989-09-05

Abstract

The invention relates to an outer building wall heating device with a heat exchanger comprising a mainly reversed U-shaped outer wall part, closed at the bottom end, an inner wall part lying inside the outer wall part and having a mainly triangular shape with downwardly directed top lying at some distance above the bottom of the outer wall and an air inlet stud formed in the rear wall of the outer wall and an air outlet stud formed in an inclined partition having its under edge connected to the top of the inner wall and its upper edge connected to the rear wall of the outer wall of the heat exchanger and lying within the contours of the air inlet stud, all heat exchanger parts consisting of corrugated of like sheet material.

Description

United States Patent Van Der Goot [451 Sept. 5, 1972 [54] OUTER BUILDING WALL AIR HEATING DEVICE WITH A HEAT EXCHANGER [72] Inventor: Arnold Van Der Goot, Voorbroek 9,

Terborg, Netherlands [22] Filed: Nov. 4, 1970 [21] Appl. No.: 86,717

[30] Foreign Application Priority Data Nov. 14, 1969 Netherlands ..69/ 17139 [52] US. Cl ..126/85 B, 126/90 R [51] Int. Cl. ..F23l 17/04, F24h 3/00 [58] Field of Search ..126/85 R, 85 A, 90 R, 91 R, 126/11OR,11OB,116R,116B

[56] References Cited UNITED STATES PATENTS 2,192,920 3/1940 Linch ..126/90 R 3,348,533 10/1967 Wilhoite ..126/85 B X FOREIGN PATENTS OR APPLICATIONS 215,119 5/1961 Austria ..126/85 B Great Britain ..126/85 B France ..126/85 B Primary Examiner-Charles J. Myhre Attorney-W. G. Fasse 57] Z ABSTRACT The invention relates to an outer building wall heating device with a heat exchanger comprising a mainly reversed U-shaped outer wall part, closed at the bottom end, an inner wall part lying inside the outer wall part and having a mainly triangular shape with downwardly directed top lying at some distance above the bottom of the outer wall and an air inlet stud formed in the rear wall of the outer wall and an air outlet stud formed in an inclined partition having its under edge connected to the top of the inner wall and its upper edge connected to the rear wall of the outer wall of the heat exchanger and lying within the contours of the air inlet stud, all heat exchanger parts consisting of corrugated of like sheet material.

7 10 Claims, 1 Drawing Figure PATENTED P 5 I INVEN'I'UR:

ARNOLD VAN DER G001 OUTER BUILDING WALL AIR HEATING DEVICE WITH A HEAT EXCHANGER BACKGROUND OF THE INVENTION 1. Field of the Invention Outer building wall air heating device with a heat exchanger.

2. Description of the Prior Art Such an outer building wall air heating device is already known. In this known device the heat exchanger consists of parts of flat sheet material or cast iron which are welded together. The construction is consequently heavy and laborious and expensive in manufacture.

SUMMARY OF THE INVENTION The invention aims at providing a construction for the heat exchanger which is particularly easy in manufacture and at the same time can be made with a very low weight and very cheaply, but in addition possesses particularly favorable heat exchanging properties.

According to the invention this is obtained by that the heat exchanger is formed by a mainly reversed U- shaped outer wall part closed at the bottom end by a bottom plate, an inner wall part having mainly the shape of a triangle with downwardly directed top lying at some distance above the bottom plate, while the mutually parallel upper walls of the outer wall part and the inner wall part are provided with corresponding apertures of which the side walls are interconnected at the inside of the apertures, whereas between the top of the inner wall part and the rear wall of the outer wall part an inclined partition is arranged provided with a bent out tube stud extending freely through an opening in the adjacent upstanding rear wall of the outer wall part, while the two lateral ends of the two wall parts are closed by side wall parts leaving free, at least in part, the internal space of the inner wall part. Such a heat exchanger requires little welding work and can easily be composed of a small number of parts.

Preferably the construction is made such that the two wall parts and the inclined partition consist of corrugated or acute angled zigzag ribbed sheet material of which the tops of the corrugations or ribs run perpendicularly to the direction of bending of the two wall parts. In this way not only the advantage of a good heat exchanger is obtained as a consequence of a relatively enlarged heat exchanging area, but, besides the possibility is created for the formation of apertures in the horizontal upper portion, which are necessary for the heating of the air and which can be easily formed of the material of the wall parts by the use of the corrugated or ribbed sheet material and can be interconnected along their edges.

For the formation of channels for the admission of combustion air and for the discharge of the flue gases and for sealing purposes with respect of the surrounding space to be heated, furthermore, appropriately, the openings in the upstanding rear wall of the outer wall part and in the inclined partition can each be connected to a sleeve, which extends through the outer building wall to the outside, while around the whole heat exchanger a housing is arranged, which can be sealed with respect of the outer wall part of the exchanger and with respect of the outer building wall. Also this construction is particularly simple and easily adaptable to each possible thickness of the outer building wall.

BRIEF DESCRIPTION OF THE DRAWING The drawing shows a vertical cross-section of an outer building wall air heating device with heat exchanger according to the invention.

DESCRIPTION OF PREFERRED EMBODIMENT OF THE INVENTION In the drawing 1 indicates the housing of the heating device. In the housing a heat exchanger is arranged at an adequate distance all around for air circulation and which is formed by a mainly reversed U-shaped outer heat exchanger casing 2, closed at the bottom side by a bottom plate 3. In the space enclosed by this outer casing 2 an inner heat exchanger casing 4 is situated, having mainly the shape of a triangle with the top directed downwards. Both heat exchanger casings 2 and 4 are made of corrugated or acute angled zigzag ribbed sheet material of which the ribs lie in vertical planes and perpendicular to the bending axes of the wall parts. The upper portion 5 of the inner casing 4 lies parallel to the body portion 6 of the outer casing 2 which is mainly horizontal. In the parallel wall portions of the two casings 2 and 4 apertures 10 are cut out, of which the edges are bent towards one another, which is rendered possible by the used corrugated of ribbed sheet material, thusforming studs running transversely through the heat exchanger and of which the edges meet about in the middle between the two parallel

wall part portions

5 and 6 and lie against one another with flanges 7 and 8 extending radially inwards into the formed apertures and are interconnected for example, in that one of the flange rims, e.g. the flange rim 8, is made broader than the other one and folded back around this other flange rim 7. The two casings 2 and 4 of the heat exchanger are therefore interconnected along the folds 9 of the apertures 10. At the bottom end 11 the two triangle sides 4a and 4b of the inner casing 4 are interconnected at some distance from the bottom plate 3. At 11 also a partition 12, also of ribbed or corrugated sheet material with ribs lying in vertical planes, is connected to the inner casing 4, e.g. by welding or spot welding. This partition 12 is connected to the upstanding rear wall 2b of the outer casing 2 along its upper rim. In this partition an opening 13 is cut out, of which the edge is bent out and forms a tube stud 14, On this tube stud or pipe fitting 14 a sleeve 15 is pushed on, which extends through the outer building wall 16 and is closed at the outer end by a perforated cover 17. For enlarging the passage to the opening 13 in this partition the upper portion of the opposite rear wall 4b of the inner casing 4 is bent inwards and provided with an inclined joining portion 40, which joins the partition 12 near the under rim of the opening 13. At the lateral sides the heat exchanger is closed by walls Ila of flat sheet material which interconnect the inner and outer casings 4, 2 but which leave free or open the inner space of the inner casing 4 at both ends.

The tube stud 14 extends through an opening 18 formed in the upstanding rear wall 2b of the outer casing 2 of the heat exchanger and of which the rim 19 is bent out. Around this bent out rim or collar 19 lies a sealing or heat insulating ring 20, e.g. of asbestos cord or other suitable material, which on the other hand is enclosed in a peripheral groove 21, formed along an inwardly impressed ring-shaped groove 22 in the rear wall 1b of the housing 1, In the impressed ring-shaped groove 22 a second sealing ring 23 is arranged, lying at the outside of the housing, e.g. also of asbestos cord. To the rim of the opening 21 in the rear wall 1b of the housing, furthermore, a short sleeve 24 is connected, e.g. by welding or spot welding. On this sleeve 24 a second sleeve 25 is pushed on, of which the outer rim 26 is bent back and lies against the outside of the outer building wall 16. In the tube 25 a perforated ring 28, having an inwardly bent rim 29, is arranged with the aid of tongues 27 bent out inwardly, which ring supports the inner sleeve 15 running through it at the outer end eccentrically, displaced upwards.

g In the under portion of the heat exchanger a burner 30 is arranged in the front portion between the upstanding front wall 2a of the outer wall part and the upstanding front wall l4a of the inner wall part and the upstanding front wall 4a of the inner wall part, which burner is connected to the fuel supply means in a not shown manner.

The operation of the described device is as follows.

If the burner 30 is ignited, the generated heat will create an upwards flow of the flue gases above the burner, whereby fresh combustion air is drawn through the

sleeves

25 and 24 and the opening 19 in the rear wall 2b of the outer wall part of the heat exchanger and through the space between the lower end 11 of the inner wall part and the bottom plate 3, whereby the combustion can continue. The flue gases flow upwards between the wall portions 2a and 4a of the heat exchanger, heating the corrugated or zigzag ribbed walls. Then the flue gas stream bends backwards and flows through the horizontal upper portion of the heat exchanger round the sidewalls of the apertures 10. Thereafter the flue gas stream bends down between the

rear wall portions

2b and 4b of the heat exchanger and then streams further through the opening 13 in the inclined partition 12 and the tube stud 14 with outlet sleeve 15 connected to it and carrying the perforated cover 17, to the outside.

The room air streams upwards through the housing 1 in the space lying around the heat exchanger, and further through the two laterally open ends of the inner casing 4 air can stream into the internal space between the inner walls 4a and 4b and can ascend through the apertures 10 after having taken up heat.

As may have appeared from the above description, with a stove of the kind described, no combustion air is drawn from the space to be heated, but as well the combustion air as the flue gases aredirectly supplied from the outside air and discharged to the outside respectively, without a chimney being necessary. Therefore only a heating of the air takes place in the space to be heated.

The shown and described device is particularly favorable in view of the heat transmission and it is particularly simple in constructive respect and it IS easy and cheap in manufacture.

What is claimed is:

1. In aheater connectable to an outer building wall and including heating means as well as a heat exchanger having an outer casing with a closed bottom and an inner casing of substantially triangular crosssection with a downwardly pointing end, the improvement comprising first wall means forming said outer heat exchanger casing and including an upper outer casing wall, a first aperture in said upper outer casing wall, second wall means forming said inner heat exchanger casing and including an upper inner casing wall, a second aperture in said upper inner casing wall, means for interconnecting said first and second wall means around said first and second apertures, whereby space surrounding said outer casing is connected to space in said inner casing, a rear wall as part of said first wall means of said outer heat exchanger casing, third wall mean extending slantedly upwardly and connected to said downwardly pointing end of said inner heat exchanger casing as well as to said rear wall of said outer heat exchanger casing, a third aperture in said third wall means, pipe fitting means, means for attaching said pipe fitting means to said slanted third wall means around said third aperture, an opening in said rear wall of said outer heat exchanger casing positioned so that said pipe fitting means extend freely through said opening, said inner heat exchanger casing having at least partially open lateral ends, and lateral end wall means for interconnecting said inner and outer heat exchanger casings to each other.

2. The heater according to claim 1, wherein the first and second wall means of said inner and outer casings as well as said slanted third wall means are made of corrugated sheet material including corrugations extending substantially perpendicularly to a direction in which said wall means are bent.

3. The heater according to claim 1, wherein said first and second and third wall means are made of sheet material having a zig-zag cross-section with ridges extending substantially perpendicularly to a direction in which said wall means are bent.

4. The heater according to claim 1, further comprising first and second sleeve means extending through a hole in said building wall, a collar surrounding said opening in said rear wall for releasably joining said opening to said first sleeve, means for releasably connecting said second sleeve to said pipe fitting connected to said third aperture in said slanted third wall means, a heater housing located about said outer heat exchanger casing, and means for heat insulating said heater housing from direct contact with said outer heat exchanger casing and from direct contact with said building wall.

5. The heater according to claim 4, wherein said second sleeve means extends through said first sleeve means, said heater further comprising perforated ring wall means for supporting said second sleeve means in said first sleeve means.

6. The heater according to claim 5, further comprising an apertured cover member for covering said second sleeve means at its end extending out of said hole in the building wall.

7. The heater according to claim 5, wherein said first and second sleeve means each have a respective longitudinal axis whereby both axes extend in parallel to each other, said sleeve means being arranged relative to each other so that the longitudinal axis of the second ing has at least one bend therein to provide for said spacing.

10. The heater according to claim 1, wherein said means for interconnecting said first and second wall means comprise inwardly and outwardly drawn collar means, and means for joining said collar means to each other intermediate said apertures. V

UNITED STATES PATENT OFFICE CERTIFICATE OF CORRECTION Patent No. 3.688.759 Dated September 5. 1972 Inventor) Arnold Van Der Goot It is certified that error appears in the above-identified patent and that said Letters Patent are hereby corrected as shown below:

On the cover sheet, insert [73] Assignee Metaalv varenfabriek Joh. Th. Benraad N V; Ettensestraat, Terborg, Netherlands Signed and sealed this 1st day of May 1973.

(SEAL) Attest:

EDWARD M.FLETCHER,JR. I ROBERT GOTTSCHALK Attesting Officer Commissioner of Patents FORM Po-1o5o (10-59) UsCOMM-DC 60376-P69 use GOVERNMENT PRINTING OFFICE 19:9 o-aes-sn,

Claims

1. In a heater connectable to an outer building wall and including heating means as well as a heat exchanger having an outer casing with a closed bottom and an inner casing of substantially triangular cross-section with a downwardly pointing end, the improvement comprising first wall means forming said outer heat exchanger casing and including an upper outer casing wall, a first aperture in said upper outer casing wall, second wall means forming said inner heat exchanger casing and including an upper inner casing wall, a second aperture in said upper inner casing wall, means for interconnecting said first and second wall means around said first and second apertures, whereby space surrounding said outer casing is connected to space in said inner casing, a rear wall as part of said first wall means of said outer heat exchanger casing, third wall mean extending slantedly upwardly and connected to said downwardly pointing end of said inner heat exchanger casing as well as to said rear wall of said outer heat exchanger casing, a third aperture in said third wall means, pipe fitting means, means for attaching said pipe fitting means to said slanted third wall means around said third aperture, an opening in said rear wall of said outer heat exchanger casing positioned so that said pipe fitting means extend freely through said opening, said inner heat exchanger casing having at least partially open lateral ends, and lateral end wall means for interconnecting said inner and outer heat exchanger casings to each other.

7. The heater according to claim 5, wherein said first and second sleeve means each have a respective longitudinal axis whereby both axes extend in parallel to each other, said sleeve means being arranged relative to each other so that the longitudinal axis of the second sleeve means is located above the longitudinal axis of the first sleeve means.

8. The heater according to claim 1, wherein said inner heat exchanger casing has a rearwardly facing wall which is arranged relative to the third upwardly slanted wall means to provide a spacing between the rearwardly facing wall and the third wall means.

9. The heater according to claim 8, wherein said rearwardly facing wall of said inner heat exchanger casing has at least one bend therein to provide for said spacing.

10. The heater according to claim 1, wherein said means for interconnecting said first and second wall means comprise inwardly and outwardly drawn collar means, and means for joining said collar means to each other intermediate said apertures.