US2482746A - Space heater - Google Patents

Description

Sept. 27, 1949. j R. E. CROZIER 2,482,746

' SPACE HEATER Filed Dec. 10, 1945 5 Sheets-Sheet l Inventor Robe/v f (raz/zr Sept. 27, 1949. I E, cRoz 2,482,746

SPACE HEATER Filed Dec. 10, 1945 3 Sheets-Sheet 3 2 I mmitor Patented Sept. 27, 1949 'UNITED STATES PATENT OFFICE SPACE HEATER Robert E. Crozier, Detroit, Mich. Application December 10, 1945, Serial No. 634,041

1 2 Claims.

This invention relates to space heating and more particularly to a warm air heating system in which the air is circulated mechanically throughout the space to be heated.

The primary object of the invention is to improve the thermal efliciency of such a heating system by utilizing the maximum amount of heat radiated by a heating unit.

Another object of the invention is to prevent overheating of the air and air ducts through which the Warm air is circulated so as to eliminate the danger of fire occurring in a building as a result of overheating.

Another object is to prevent the release of noxious gases into the space being heated and to clean and humidity the air before its release into the air ducts.

The above and other objects may be attained by employing this invention, which embodies among its features a boiler having connected in. series thereto a pair of vertically spaced heat exchange units, an insulated casing enclosing least a portion of the boiler and the heat exchange units, means to create a draft of air through the casing and around the heat exchange unit and the boiler, means to regulate the firing of the boiler should the temperature of the heating fiuid flowing between the heat exchange units vary within definite limits, and means associated with the top of the boiler for interrupting the boiler firing should the temperature oi. the water within the boiler exceed a predetermined point.

In the drawings:

Figure l is a vertical sectional view through heating unit embodying the features of this invention, portions thereof being broken away to more clearly illustrate certain details of construc. tion,

Figure 2 is a sectional view taken substantially on the line 2 2 of Figure l and looking in the direction of the arrows,

Figure 3 is a sectional view taken substantially on the line 3-3 of Figure 1 and looking in the direction of the arrows,

Figure 4 is a sectional view taken substantially on the line ii of Figure 1 and looking in the direction of the arrows,

Figure 5 is a fragmentary sectional view taken substantially on the line 5-5 of Figure 1 and looking in the direction of the arrows,

Figure 6 is a perspective View of the apparatus in its entirety, and

Figure '7 is a fragmentary view of the apparatus showing a modified type of boiler installed there- Referring to the drawings in. detail, a boiler i0 is provided with the usual firing opening which is closed by a door it and an ash pit, access to which is had through a door-way which is closed by a door l2. Leading from the upper end of the boiler is the usual flue-connecting pipe l3 which is adapted to be connected in the customary manner to a chimney or stack. The boiler It is provided with the customary water jacket of conventional form, from the lower end of which leads a pipe l5, and leading from its upper end is a pipe it. These pipes are connected, respectively, to heat exchange units l1 and is which, in turn, are connected in series through a suitable coupling i9. From the foregoing, it will be seen that the boiler and heat exchange unit combine to form a closed circuit through which water heated from the boiler will circulate through the pipe l6 downwardly through the heat exchange unit 1%, coupling l9, heat exchange unit I! and back to the boiler through the pipe 55. Due to the arrangement of the parts, that is, the heat exchange units l1 and it being in vertically spaced relation, it will be obvious that the heating unit is will achieve and retain a higher temperature than can be maintained in the unit IT.

The boiler is kept filled with water through the medium of a vertically extending supply pipe 29, to the upper end of which is connected an expansion 22 leads to discharge the water should it attain a height above a predetermined level within the tank 2|. Leading into the tank ii is a float valve 23 carrying a float 24 for an obvious purpose. The fioat valve 23 is connected through a branch pipe 25 to a water supply pipe 25, one end of which is provided with an elbow 21 through which the humidifier, to be more fully hereinafter described, is supplied with water.

Enclosing the boiler l0 and the heat exchange units IT and I8 is a casing 28, the bottom of which is spaced upwardly from the bottom of the boiler so as to clear the ash pit door, and the front wall of the casing is formed with openings through which project the fiue connection l3 and the frame surrounding the firing opening of the boiler. It will thus be seen that the interior of the casing 28 is isolated from any contact with fiue gases, dust or dirt resulting from the firing of the boiler.

Extending horizontally from the back Wall of the casing 28 to a point about midway of the width of the boiler i0 is a baffle plate 29 and tank 2| from which an overflow pipe extending vertically through the casing at a point about midwa of the length of the bafiie plate 29 are partitions 39 formed with openings 3| for the accommodation of the heat exchange units H and M. It will thus be seen that the casing is divided by the bafiie 29 and partition walls 30 into four chambers 32, 33, 34, and 35. An air intake duct 39 leads into the chamber 32 and outlet ducts 39 lead from the chamber 35. These ducts may lead to any space that is to be heated so that warm air discharged through the ducts 38 will be supplied to the space and as the air cools it is withdrawn and returned to the casing 28 through the duct 36.

In order to establish an air flow through the casing, I provide a blower 39 which is connected through a funnel-shaped passage 40 to direct the blast created by the blower through the heat exchange unit I1. The blower 39 is of conventional form and is adapted to be driven by any suitable prime mover such as a motor 4|, and surrounding the blower and motor is a housing 42 having openings 43 therein in which filters 44 are situated so that air entering the chamber 32 cannot enter the casing 49 without passing through the filters by which the air is cleansed of any dust or dirt that it may have gathered in the course or its circulation through the space. The prime mover 41 is adapted to be connected through any suitable means to a thermostatic control device in the space to be heated so that when the temperature in such space falls below a predetermined point, the blower will be automatically started. It is understood, of course, that when the temperature in the space has been brought up to normal, the blower is automatically cut 011.

It is obvious that if so desired, suitable expansion couplings 49 may be employed between the pipes l and I6 and their respective heat exchange units I1 and 18 so as to compensate for rapid fluctuation in temperature and consequent expansion of the materials from which the parts are made.

Secured on a suitable bracket 5|] mounted on the boiler within the housing 28 and preferably in the chamber 34 between the boiler and the heat exchange unit I 8 is a humidifier 5| which comprises a relatively shallow tray or vessel 52 containing water 53. A float valve 54 is situated in the tray 52 and is connected through the medium of a pipe 55 to the elbow 21 so that the water 53 in the humidifier may be maintained at a constant level.

Should it be so desired, a modified type of boiler designated generally 56 may be employed in which the outer surface of the boiler is provided with heat radiating fins 51 to increase the heat radiating surface of the boiler.

While in the foregoing there has been shown and described the preferred embodiment of this invention, it is to be understood that minor changes in the details of construction and combination and arrangement of parts may be resorted to without departing from the spirit and scope of th invention as claimed.

What I claim is:

1. Space heating equipment which includes a casing, a boiler within said casing adjacent one end thereof, a baflle plate extending horizontally within said casing and partially around the boiler, a partition wall extending vertically through said casing to form in conjunction with the bafile plate an air inlet chamber and an air discharge chamber adjacent the end of the casing remote from the boiler, the partition wall having openings therethrough above and below the baffle plate, a heat exchange unit in each opening, said heat exchange units being connected in series with the boiler, and a blower within the air inlet chamber to direct a blast of air through the lowermost heat exchange unit toward the boiler around the end of the baflie plate adjacent the boiler and into the air discharge chamber through the uppermost heat exchange unit.

2. Space heating equipment which includes a casing, a boiler within said casing adjacent one end thereof, a baiiie plate extending horizontally within said casing and partially around the boiler, a partition wall extending vertically through said casing to in conjunction with the balile plate an air inlet chamber and an air discharge chamber adjacent the end of the casing remote from the boiler, the partition wall having openings therethrough above and below the baflie plate, a heat exchange unit in each opening, said heat ex change units being connected in series with the boiler, and a blower within the air inlet chamber to direct a blast of air through the lowermost heat exchange unit toward the boiler around the end of the baffle plate adjacent the boiler and into the air discharge chamber through the uppermost heat exchange unit, a housing enclosing the air inlet of the blower, said housing having air inlet openings therein and air filters closing the openings in said housing.

ROBERT E. CROZIER.

REFERENCES CITED The following references are of record in the file of this patent:

UNITED STATES PATENTS Number Name Date 1,664,317 Pabodie Mar. 27, 1928 1,778,146 Davis Oct. 14, 1930 2,104,212 Taylor Jan. 4, 1938 2,249,554 Daly July 15, 1941 2,282,013 Wetzteon May 5, 1942 2,269,055 Gower Jan. 6, 1942

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