Патент USA US2407943код для вставки
2,407,941 Patented Sept. 17, 1946 UNITED STATES PATENT OFFICE 2,407,941 BOILER Ralph D. Terhune, Ridgewood, N. .L, assignor to The Bryant Heater Company, Cleveland, Ohio, a corporation of Ohio Application April 13, 1945, Serial No. 588,082 1 Claim. (Cl. 122-225) _ 1 , This invention relates to boilers employed for heating buildings or the like by serving hot water or steam radiators therein; and more particularly the invention relates to such boilers of sectional construction, and to the location therein of a heat exchanger for the purpose of serving a do mestic hot water line by obtaining heat from the water within the boiler. The object of the invention is to improve the efficiency of the boiler in its domestic water heat 10 2 The, heat exchanger here shown is in the form of a number of return-bend tubes I4 mounted on plate l5 which in turn covers an opening on the chamber and just below the water line. right side of the intermediate boiler section 3, the tubing extending from the plate to a position ad jacent the far nipples ‘i of the section. It will be appreciated that the size and nature of the heat exchanger I4 will depend upon the demands of the installation. In operation, whenever there is no demand upon the heat exchanger 14, the contents of which disposition of the parts that the boiler will have therefore will be substantially at the tempera improved internal circulation. ‘ ture of the surrounding water in the boiler, cir Further objects and advantages will be ap parent from the following description, taken in 15 culation of the water will be substantially un ing capacity, and to that end, to provide such affected by. the heat exchanger, the latter, how connection with the accompanying drawing, ever, being located above the combustion cham which illustrates a boiler casting assembly, Figs. ber, where the boiler water is at maximum tem 1, 2 and 3 being respectively front elevation, top perature. v and right side views. In steam service the rate of liberation will be With reference now to the drawing, in the as 20 maximum just above the heat exchanger and in sembly illustrated there are three sections, hot water service there will be ?ow, at maximum namely, front I, back 2, and intermediate sec— temperature upwardly past the heat exchanger tion 3 disposed therebetween, it being under and from the boiler through the top outlet 6. In stood that, as is usual in the art, the assembly may include other sections located between the 25 either event, on domestic hot water demand, flow through the heat exchanger will produce water intermediate section and either the front or the instantly at maximum temperature, whether the back section, or both, so that a range of capac heat exchanger be arranged to serve astorage ities is available in production. The sections tank or be connected directly to the domestic hot shown are of cast iron, and of course hollow, as usual. 30 water system. In summer operation, ?ow through the boiler The front and back sections are provided in the to its radiators being cut off either by the usual bottom left corner with return inlets 4 and near suitable valves in a hot water installation, or by the top with end outlets 5, and the intermediate operation below steaming temperature, in a steam section is provided with a top outlet 6 adjacent its right side. The sections are interconnected 35 installation the heat exchanger still is at the loca tion of maximum boiler water temperature. with communication between their cavities by the usual nipples I, located at the right side ad Under such condition internal circulation will generally be upwardly in the intermediate section jacent top and bottom, and at the left side ad jacent the water line, as indicated in dotted lines, and downwardly in the end sections during pe Fig. 1; wherein appears a mark 8, at the water riods of no domestic water demand, and may be line. in the reverse direction when the heat exchanger The front section I has an opening 9 and the output is maximum and the heat'exchanger is of other sections are correspondingly formed, as in suf?cient capacity as to materially effect thermo dicated in dotted lines at [0 Fig. 3, to provide syphonic ?ow. ' the usual combustion chamber, the boiler illus 45 Having thus described my invention, I claim: trated being adapted for gas fired operation. In a sectional heating boiler including a pair As illustrated the sections appear slightly spaced of end sections and an intermediate section there apart in order to show the nipples ‘l, but in prac between arranged to provide a combustion cham tice the sections will be pulled tight together by ber with ?ue passages leading therefrom between tie rods located in recesses H, as will be well 50 said sections, means interconnecting said sec understood by one familiar with the art. Sim tions at one side adjacent the waterline and at ilarly, the castings are formed to provide ?ue pas the other side adjacent the top and the bottom, sages I2 therebetween, bosses preventing ?ue gas said end sections having cold water inlets ad egress except through those passages, a seat l3 jacent the bottom at said ?rst named side, and a at the top for a ?ue collector, insulation, jacket, 55 domestic water heat exchanger disposed within gauge glass, etc. being added to the assembly said intermediate section above said combustion before the boiler is complete. chamber and below the waterline, said intermedi According to this invention heat exchanger means for domestic water is disposed within the intermediate section, above the combustion 00 ate section having, at said other side, a top out let and mounting means for said heat exchanger, RALPH D. TERHUNE.