US1557484A

US1557484A - Heating device

Info

Publication number: US1557484A
Authority: US
Publication date: 1925-10-13
Anticipated expiration: 1942-10-13

Description

Patented 4ct. 13, 1925.

JOHN K. TOMLINSQN, OIF CHICAGO, ILLINOIS.

HEATING DEVICE.

Application led April 9, 1923. Serial No. 630,737.

To all whom t may concern.' l

Be it known that I, JOHN K. ToMLINsoN,

n a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented new and useful Improvements in Heating Devices, of which the following is a full, clear, concise, and exact description, reference being had to the accompanying drawing, forming a part of this specification.

My invention relates to heating devices. In the particular embodiment shown, it is exemplified as an attachment for use with a hot air furnace, to utilize the heat which is ordinarily wasted, but it is obvious that it is capable of use in other locations and relations.

One of the objects of my invention is to provide a heating device in which it is possible to extract practically all of the heat from the products of combustion above the temperature of the room to be heated.

A further object of my invention is to provide a heat-utilizing device which will be simple and durable in construction and efficient in use.

A further object of my invention is to pro vide improved means for scraping the soot from the walls of the passages through which the products of combustion pass.

A further objectof my invention is to provide improved means for the removal of the soot.

Further objects will appear from the detailed description to follow and from the appended claims.

In the drawings, in which an embodiment of my invention is shown- Figure 1 is a somewhat vdiagrammatic part sectional, part elevational view, showing my heating device in connection with a hot air furnace;

, Fig. 2 is a longitudinal vertical section through the heating device, on the line 2-2 r of Fig. 4;

Fig. 3 is a longitudinal vertical sectional view through the heating device on theline 3-3 of Fig. 4; and

Fig. 1 is a vertical transverse sectional view substantially on the line 1 -4 of Fig. 2.

Referring now to the drawings in detail, the construction shown therein comprises a heating device 10, having a plurality of elongated spaced parallel passages 11 for the products of combustion, and a plurality of elongated parallel passages 12 for the air to be heated, filling the space betweenthe first mentioned passages. The products of combustion pass in one direction through the first set of passages, andthe air passes in the opposite direction through the second set of passages, thus providing for the greatest possible transfer of heat from the products of combustion to the air to be heated. l

As shown in Fig. 1 the device may be in-y terposed in the iue of an ordinary hot air furnace, the passages for the products of combustion being, as it were, in series with the Hue, sectionsl and 1,4, so that the flue gases passthrough these spaced parallel passages, the hot flue gases thus heating the air which is. going in the opposite direction between the passages for the flue gases. The air thus heated may be taken in at that part of the device adjacent'the point where i `be heated through the device in the other direction. n

l The air, after passing through the heating passages in the device, leaves the device through the pipe 18, which may, as indicated in. the drawing, lead to the heating chamber 19' surrounding the :fire pot 20 of the furnace, from whence it goesthrough the. pipes 21 to the rooms to be heated. If desired, the pipe 18 might lead direct to, the yroom or rooms toA be heated.

In order to provide for the ready transfer of heat from the flue gases to the air to be heated, it isdesirable that the walls separating the flue gases from the air to be heated should be of thin heat conducting material, such as sheet metal, and should be kept free from soot. For this purpose, Scrapers 22 are provided, mounted to swing up and down in the high narrow passages points as indicated at 16 11 for the flue gases, the edges of these scrapers engaging the side walls of these passages to keep them clean.

In order to catch the soot scraped from the walls of the flue gas passages, a removable pan 23 is provided, located under; neath the flue gas passages. In order to provide for the removal of this receptacle, a door 24 is provided at the farther end of the device, which can be opened to enable the pan 23 to be drawn out.

This pan construction-is shown in Fig. 3. As an alternative construction, in place of drawing the pan out of the end, the pan might be constructed as asort of valve or damper', c-operating with the lower wall 25 of the flue gas passage, the lower wall 25 and the bottom 26 of the pan being provided with a plurality of openings 27 and 28, which can be brought into registration by movement of the slidable member, to permit the soot, etc., to fall down and o'ut. As shown in Fig. 4, the walls of the passages for the flue gases and air to be heated, may be formed of sheetmetal, pressed` or otherwise formed into shape. shown comprises in the main an outside trough member 29, having sides 30r and 3l and a bottom 32, a top member 33 extending from side to side of the trough-shaped member, and a partitionv member 34 having a plurality of deep channels, which form passages for the air to be heated, the spaces between these deep channels forming passages for the flue gas.

The partition member 34 does not eX- tend the full length of the trough 'member 29, a space being left at each end,- the space at one end A providing for the con*- nection with the flue section 13, and the space at the other end providing for a connection with the nue section 14. The ends of the channel portions of the partition member 34 are closed by means ofsheet metal heads 35, 36, (Fig. V2), which prevent the air to be heated from mixing with the flue gas.y .The top member 33 is apertured at 37 and 38 to provide for the connection with the air inlet pipe l5, and the air outlet4 pipe 18. The path of the flue gas and of the air to be heated,is indicated by the arrows A and B respectively in Figs. l, 2 and 3.

As shown in Fig. 2 the fans 39 and 4U which force the gas and air thru their respective passagesV may both be mounted on the same shaft 41, which may be rotatably mounted in

brackets

42, 43 and 44, and driven in any Vsuitable manner by a `drive pulley 45.

As shown in Figs. 3 and 4, the Scrapers y22 may be mounted on cross pins 46 which in turn are mounted on rock arms 47, 'pivoted at 48'. These rock arms may lac tuz'ited by means of a crank member 49, (Fig. 4),

This construction i secured to the shaft 50, to which the rock arm 47 is secured.

In order to cause practically all of the flue gas to pass directly in contact Vwith the partition member, to cause the greatest possible transfer of heat, barrier plates 5l may vbe provided in the trough or pan 23, to pre- -vent any great amount of flow of the flue glas underneath the partition member 34.

Vhile I have shown but one form of my invention, it is obvious that it may be embodied in other forms covered and defined by the appended claims.

Having thus described my invention, what I claim as new and desire to secure by United States Letters Patent, is'.

1. A heating device comprising a straight tube rectangular in cross section having an opening for the Afurnace connection at one end of its lower side and having an opening for the flue connection at the other end, a straight partition member in said tube and extending Alongitudinally thereof and having deep channels therein spaced from each other, each channel being closed at both ends, the spaces between the channels providing passages for the products of combustion, said tube having an opening in its top side adjacent one end of the partition member for admitting air to be heated 'to one end of said channels, said tube also having an opening in its top adjacent the other end of the partition member for the escape of the heated air from said channels, said tube rcomprising a sheet metal channel member of uniform cross section and a sheet metal cover, and said partition member comprising a sheet metal member d eepl57 corrugated in cross section to form the deep channels.

y2. A heating device lia-ving passages for the flow in one direction of the products of combustion and passages for the flow in the opposite direction of the air to be heated, comprising a straight elongated tube, a partition member between Ythe hot gases and the air to be heated, said partition comprising aplurality `of fiat vertical walls, longitudinal scraper members for scraping said walls, and means for mounting said Scrapers for parallel movement comprising a pair of rock members pivotally mounted adjacent the ends of said partition respectively and pivotally connected with the respective ends of said scraper members. y

3. A heating device having passages for the flow in one direction of the products of conrbusti'on andpassages for the flow in the opposite direction of the air to be heated, comprising a straight elongated tube, a partition member between the hot gases and the air to be heated, said partition comprising a plurality of 'flat vertical walls, longitudinal scraper members for scraping 'said walls, andmeahs for mounting said Scrapers for parallel movement comprising a pair of rock members pivotally mounted adjacent the ends of said partition respectively and pivotally connected with the respeotive ends of said scraper members, said tube being extended beyond said partition at each end to provide a pair of chambers which receive said rock members, one of said chambers having a port for the inlet of the hot gases and the other of said 10 chambers having a port for the escape of said gases.

In Witness whereof, I have hereunto subscribed my name.

JOHN K. TOMLINSON.