US2371096A - Hot-water heater - Google Patents

Description

March 6, 1945. D. ZIPETO HoT WATER HEATER Filed Feb. `3, 1944 i 'Patented 6, 1945 UNITED STATES PATENT GFFICE Hor-WATER. HEATER Cosmo D. Zipeto, Philadelphia, Pa.

ApplicationFebruary 3, 1944, Serial No. 520,927

(ol. 122-356) v 2 Claims.

yThis invention relates Ato water heaters, and a principal object of the invention is toprovide a heater of simple and inexpensive construction having exceptionallyhigh operating ei'liciency.

In the attached drawing;

Fig. 1 is a vertical sectional view -of a heater made in accordance with thel invention;

Fig. 2 is a section on the line' 2-l-2, Figure 1;

Fig. 3 is a detached view in perspective illustrating certain' of the elements of the heater structure, and

Fig. 4 is a view in perspective of a fragmentary part of the heating coil.

With reference to the drawing, the heater in a preferred embodiment comprises a hollow base preferably of copper or other metal of high heat conductivity. The duct 8 extends upwardly from the tank 4 in serpentine formation, said4 pipe y having in effect a plurality of substantially horizontal sections 9 superimposed in spaced relation one above another and connected in series with each other by way of curved sections II. The upper end of the duct 8 is connected tothe underside of a tank I2 from`which a pipe I3 extends to a hotwater reservoir, or to a heating system as the case may be.

The base section I is preferably in the form of a casting having a bottom iiange I4, vertical side walls I5, and an upper outwardly extending flange I6 which terminates in an up-turned edge I1.. The upper iiange I6 with its up-turned edge forms a shallow receptacle for the base flange The several superimposed sections I9form, in

conjunction with the base section I, a hollow shell or stack which embraces'the serpentine duct 8, the stackbeing closed at the top by a cap section which seats upon the upper section I9. The latter section supports the tank `I2 and has in a wall thereof an opening 26 for passage of the pipe 'I3.y With reference to Figure 2 it will be noted that the base section I has an opening 21 in one wall thereof through which draft air is admitted to the lower end of the stack. and to the burners 2 for combustion purposes; and the cap section 25 is provided with a port 28 from which a iiue duct 29 extends to carry off the spent gases and vproducts of combustion.

'Between each ofthe sectionslls is a baille 3|, l

the form of which is best shown in Figure 3. The edge portions of each of these bafes seat in the shallow receptacle formed by the upper flange 2l of the associated section I9 and underlies the base iiange I8 of the superimposed sec- I8 of a superimposed section`I9. This section,

also in the form of a casting, is substantially the same as the base sectionV I but is of somewhat- I lesser'vertical. height in the present instance. The upper flange 2| of 'thel section I9 with its provided with openings 23 and 24 for passage o the pipes 5 and 6 respectively.

, 11p-turned edge 22 forms in turn a hollow recep-v.

tion. The bailie thus functions in part as a sealing gasket for the joints between the said sections. As shown in Figures 1 and 3 each of the bafiles has at one end a recess 32 through which the duct 8 extends, these recesses also providing for passage upwardly-through the stack of the hot gases from the burners 2. Each of the bailies 3l is provided with "an end section 33 which closes the outer end of the recess 32 and completes the gasket function of the baille. It

will be apparent that with the aforedescribed arrangement the hot gases from' the burners 2 ..will be caused to pass upwardly through the stack in a tortuous path following the windings of the duct 8 and will thereby remain in intimate contact with the fiat extended surfaces of the yduct from the bottom to the top of the stack.

In assembling the heater structure described above, the base section I and the', superimposed section I9 may be set up with the-burners and the tank 4 inposition, it being noted by reference to Figures 1 and 2 that the -burners are supported upon cross bars 34, and the tank upon cross bars 35 secured in and extending across the base section. The lower end of the duct 8 may be attached to the tank 4 either before or after the latter has been mounted in the two lower sec- 'tions of the stack as set forth and the duct. to-

gether with the upp`er-tank I2, may be supported in the vertical position which it assumes-within the assembly by suitable supporting means. Thereafter the lowermost baffle 3l may be placed the following section I9 then seated upon the baille and within the up-turned edge 22 of flange ZI of the said first section. The sections may be secured together by bolts 36 or may be cemented -together, as desired. The next higher baille 3| A heater constructed as described above exhibits an extraordinarily high efficiency, practically all of the sensible heat of lthe burning gases being utilized for heating the water which circulates through the system. Relatively cold water entering the tank 4 through the pipe 5 is subjected through-the shell of the said tank to the eects of the direct ilame of the rburners 2, the heated water then passing upwardly through the duct 8 to the tank l2 from which it is distributed through the pipe I3. From the time that the water enters the tank 4 to the time it leaves the tank I2 it is subjected to the effects of the heated gases passing upwardly through the stack from the burners 2, the heated gases by reason of the baiiies 3| following a tortuous course through the stack corresponding to the windings of the, duct 8. It will be noted by reference to Figure 2 thatthe duct 8 is of substantial Width and small depth, and the gases in passing upwardly act upon both faces of the duct and are thereby brought into effective heat exchange relation with substantially all of the water passing through the duct. Aside from the high operatin position at the top of the rst section I9 and ing efficiency, the heater is characterized by relative simplicity of form, it being noted that the sections I9 and the baillesv 3I33 may be standardized for different sizes of heaters, and requiring for any given size but one form of casting and baille aside from the base section I and the cap section 25.

While the invention has been described above in its application to water heaters, it will be understood that the apparatus may, as well, be used for generating steam. The term water heater as used above and in the appended claims is embracive of both of these uses.

I claim:

l. In a water heater, a stack, a sinuate duct extending through the stack, said stack consisting of a plurality of hollow superimposed sections each having at the top a shallow peripheral receptacle for the base of the immediately superimposed section, baiiles having their edge portions seated in the said receptacles of the respective sections and forming gaskets between said sections, said bafiles extending between adjoining passes of the duct windings and forming a tortuous passage within the stack conforming to said windings, and means for passing he'ated gases and water through the .said stack passage and the duct respectively.

2. In a water heater, a stack, a sinuate duct extending through the stack, said stack consisting of a plurality of hollow superimposed sections, bailies'having their., edge portions conned and forming gaskets between said sections, said bailles extending between adjoining passes of the duct windings and forming a tortuous passage within the stack conforming to said windings, and means for passing heated gases and Water through the said stack passage and the duct respectively. A

, COSMO D. ZIPETO.

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