US2356657A

US2356657A - Water heating apparatus

Info

Publication number: US2356657A
Application number: US485922A
Authority: US
Inventors: Ralph B Davis
Original assignee: Individual
Current assignee: Individual
Priority date: 1943-05-06
Filing date: 1943-05-06
Publication date: 1944-08-22
Anticipated expiration: 1961-08-22

Description

Aug. 22, 1944. R. B. DAvls WATER HEATING APPARATUS Filed May s, 194:5

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BY M" HIS' ATTORNEYS Patented Aug. 22, 1944 UNITED- STATES PATENT Y lOFFICE I Y 2,356,657 y WATER HEATING APPARATUS Ralph B. Davis, Prestonsburg, Ky. Application May-6, 1943, serial No. 485,922 v s claims. (c1. 12a- 16) i* I v This invention relates to improvements in water heating apparatus. -f

The primary object of the invention is to provide a stand boiler with a water heating apparatus or attachment which will operate with maximum efficiency in maintaining a supply of hot water in thelboiler.

Another object is to provide a water heating apparatus or attachment for stand boilers in which a gas burner is used for heating a series of water coils which are connected to the water Supply and to the stand boiler in an arrangement that will produce maximum eiiciency in the heating of the water and in the maintenance of a supply of hot water in the boiler.

More particularly, the invention contemplates a water heating apparatus wherein the water is preheated in one water coil and primarily heated in a second water coil, the water from the preheating coil being discharged into the stand boiler at a point in close proximity to the point at which the intake of the primary heating coil is located.

With these and other objects in view, the invention consists in certain novel details of construction and combinations and arrangements of parts, all as will hereinafter be more fully described and the novel features thereof particularly pointed out in the appended claims.

In the accompanying drawing,

Figure 1 is a sectional view taken longitudinally of a stand boiler illustrating the preferred embodiment of the present invention; and

Fig. 2 is a similar view illustrating a modified form of the invention.

In Fig. 1, the stand boiler I is of tubular formation, having a ue II of uniform cross-section extending axially thereof which constitutes a passage for products of combustion from the gas burner I2 mounted in any suitable manner adjacent the lower end of said flue. Immediately above burner I2, there is mounted in flue II a water coil I3 which is termed the primary heating coil, as the water passing therethrough absorbs the major portion of the heat from the burner. The intake or lower end I4 of this primary heating coil is located adjacent the lower end of the stand boiler, and said coil discharges into the upper end of the boiler, an extension I5 being provided on the upper end of the coil proper for this purpose.

Also mounted in the flue I I, at a point above the primary coil I3, is what is termed the preheating coil I6. Water from a source of supply enters the upper end of this coil and is discharged from the lower end through an extension I6a whichtermnates at a point or level within the boiler which substantially corresponds tothe level at whichv the intake I4 of the located. l l

With this arrangement ofthe heating coils I3 and I 6, the maximum heating eiect of burner I2 will be obtained by reason of the fact' that a great deal of heat that would ordinarily be lost is absorbed by the water in the upper water coil I6. The provision of this preheating coil I6 has the further advantage of preventing water entering the boiler at the temperature of the water in the service line. This, of course, increases the eiliciency of the boiler and of the heating apparatus as a whole. Furthermore, the preheated water is discharged from coil I6 into the lower portion of the boiler from which coil I3 draws its supply, so that the water, heated to a higher temperature in the top portion of the boiler, is less likely'to be aiected by the incoming water which is of lower temperature. Thus, when hot water is drawn from the boiler through the outlet I 'I in the top ol said boiler, water will flow from the lower portion ofthe boiler into primary heating coil I4 which will, at the same time, be emptying hot water into the upper end of the boiler, anda fresh increment of water will flow into the preheating coil I6 as the latter empties water which has been heated to some. extent into the bottom of the boiler. As stated, this particular arrangement of the two coils greatly increases the efficiency of the boiler, not only by reason of the absorption of a major portion of the heat from burner I2, but also by reason of the specific manner in which the water is circulated through the coils and boiler.

If desired, an adjustable closure I8 may also be provided at the discharge end of ue I I to conserve the heat from burner I2 and slightly increase the efficiency of the apparatus.

In the form of apparatus illustrated in Fig. 2, the coils I3, I6, and burner I2, are housed in flue or passage IIa located exteriorly of the boiler I!) and preferably covered with heat insulating material I9. In this arrangement, the fresh supply of water enters preheating coil I6 at the bottom thereof and the upper end of said coil is provided with an extension I6a which terminates in the lower portion of the stand boiler. As in the previously described arrangement of Fig. l, the primary water heating coil I3 of this modification draws water from the bottom porprimary heating coil I3 is tion of the boiler and discharges into the upper end of said boiler.

What I claim is:

1. In a water heating apparatus for standV boilers, the combination of a stand boiler having a vertical ilue of uniform cross-section eX- tending therethrough, a gas burner located in the lower end of said ue, a preheating water coil located entirely within said flue, said coil having its supply end located at the upper end of the flue, a discharge connection at the lower end of said coil terminating in the lower portion of the stand boiler, a primary water coil located entirely within said ue intermediate said preheating coil and said burner, the intake of said primary coil being connected to the flue at the lower end thereof and the discharge of said primary coil being connected to the upper end only of the flue, and a discharge.connection in the Lipper end of said boiler.

2. In a water heating apparatus for stand boilers, the combination of a stand boiler having a vertical flue extending therethrough and mediate said burner and said preheating coil, the intake and outlet of said primary coil being connected to the lower and upper portions, respectively, of said ue, and said boiler having a discharge outlet in its upper portion, said discharge outlet being the sole means of supplying Water from said boiler.

3. In a water heating apparatus for stand boilers, the combination of a gas burner having a vertical flue of uniform cross-section associated therewith for products of combustion, a preheating water coil to which water to be heated is supplied, said coil being located entirely within said flue and said coil having a discharge located in the lower portion of the boiler, a primary water coil located entirely within said flue intermediate said preheating coil and said burnv er, the intake of said primary coil being connect-