US1854250A - Duplex domestic hot water heater - Google Patents

Description

, 1932. G. M. CONEKIN I DUPLEX DOMESTIC HOT WATER HEATER April 19- Filed May 15, 1950 Pternteel Apr, 19, 132

STATES GEORGE MORRIS C(TNEKIN, O1? ASHEVILLE, NORTH CAROLINA.

DUPLEX DOMESTIC HOT WATER HEATER Application filed May 15,

The invention relates to a duplex domestic hot water heater.

The object of the present invention is to improve the construction of hot water heaters and to provide a simple, practical and efficient hot water heater of strong, durable and comparatively inexpensive construction adapted to utilize in winter the hot water from a water back in the furnace of the boiler of a hot water or steam heating system for heating the water within a hot water supply tank and equipped with a gas heater adapted for use in summer for heating the water within the hot water supply tank when I the house heating system is not in operation.

lVith these and other objects in View, the invention consists in the construction and novel combination and arrangement of parts hereinafter fully described, illustrated in the accompanying drawing, and set forth 1n the claim hereto appended, it being understood that various changes in the form, proportion and minor details of construction within the scope of the claim, may be resorted to without departing from the spirit of the invention or sacrificing any of the advantages thereof. In the drawing The figure of the drawing is an elevation partly in section of a duplex domestic water heater constructed in accordance with this invention.

In the accompanying drawing in which is illustrated the preferred embodiment of the invention. 1 designates a hot water supply tank ofvthe ordinary construction mounted on a suitable support 2 and connected at its upper end with a hot water discharge pipe 3 and provided at its lower end with a draw off cock 4. An ordinary feed water line is designed to be 'connected with the tank 1 which is also preferably equipped with an extra feed water pipe 5 having a valve 6 and connected with the top of the tank from which depends an interiorly arranged discharge pipe 7 extending interiorly of the tank to the lower portion thereof.

The water within the hot water supply. tank is heated by a heating coil 8 arranged interiorly of the tank and extending from Col 1930. Serial No. 452,746.

the upper portion thereof to the lower portion of the same and connected at its upper and lower ends by upper and lower connecting pipes 9 and 10 with the upper and lower ends of an exteriorly arranged coil 11 con- 5 stituting a portion of a gas heater 12. The gas heater 12 is of the usual construction and comprises a casing enclosing the coil 11 and also receiving a gas burner 13 which is located at the lower portion of the casing 12 in the usual manner. The gas burner is connected with a gas pipe 14 which is preferably equipped with a gas regulator of the thermostatic type for controlling the flow of gas to the burner 13. The gas pipe which is provided 55 with a suitable valve 15 extends to the lower portion of the tank and is connected with the burner with a horizontal arm or portion 16. The gas regulator which may be of any desired construction is suitably connected with the water within the supply tank and when the water within the tank reaches a predetermined temperature the flow of gas will be cut oil and when the water within the supply tank falls below such predetermined temperature the gas will be automatically turned a on. In practice, the burner will be constructed with the usual pilot light, butas-the particular construction of the gas burner does not constitute a portion of the present in vention, detail illustration and description thereof is deemed unnecessary.

The gas burner is designed for use in summer time when the hot water or steam heater of a houseis not in operation and in winter time when the hot water or steam heater of a house is in operation the coil 8 is heated by water from the hot water or steam heating system and the upper and lower connecting pipes 9 and 10 are connected with the water back of a boiler of a hot water or steam heating system (not shown) by upper and lower pipes 17 and 18. When the hot water or steam. heating system is in use, the water rises from the boiler to the upper pi 17 and through the connecting pipe 9 to the eating coil 8 and downward through the heating coil 8 returning through the lower pipe 18 to the boiler. In practice the pipes 17 and 18 will be provided with suitable valves for my hand, this 15th cutting ofi the boiler of the hot wnter or steam heating system when the suture is not in operation. When the gas burner is used the water within the coil ll. is heated und tlows upward through thesume and through the upper connecting pipe 9 to the heating coil 8 and then downward through the heating coil 8 to the lower connecting pipe 10 and thence to the coil 11, the difference in the temperature of the water within the two coils 8 and ll producing u continuous circulation while the gas burner is li hted. The upper connecting pipe 9 is provided with a suituhle air rent 19 for permitting the escape of uir from the coils 8 and l]. and the connecting pipes to prevent the same from becoming eir locked and interfering with the circulation of water through" the said coils.

The lower connecting pipe 10 conni- (rates with the lower end of a stand pipe 20 which extends to an ex ansion tank 21 adapted to keep the coils ull ot waiter and prevent excessive pressure in the coils and the said coils if tilled'with pure water will not scale or burn out, but will remain perfectly clean. The pressure withinthe coils may be increased or inished by raising or lowering the tank, the elevation of the expansion tank determining the pressure within the coils. The lower end of the pipe 20 is preferably connected with the lower connecting pipe 10 by a suitable coupling 22 which is also utilized for connecting the lower pipe 10 with the pi e 18 which extends to the water back in the oilerot the hot water or steam heating system.

What is claimed is:

A water heater comprising a tank, a coil therein, a, second coil exterior to the tank, pipe connections between corresponding ends of the inner and outer coils and forming therewith a closed water circuit free from any communication withthe water in the tank, means for applying heat directly to the outer coil, independent means for heating the closed water circuit and connected with the pipe connections between the inner and outer coils, an air vent in the upper pipe connection between the coils, and an expansion tank connected with the lower pipe connection between the-coils.

In testimony whereof l have hereunto set gig ofApril 1930.

enonon unis corn.

Images