1982-09-28
1984-12-11
Joyce, Harold
98 66R, 98 67, F23L 1702
Patent
active
044871120
DESCRIPTION:
BRIEF SUMMARY
This invention relates to a chimney turncap and, more particularly, to a chimney turncap which includes a hood member provided with vane means for enabling an automatic adjusting of the hood member in accordance with a direction of the wind so as to provide for a simple self-adjusting turncap serving to prevent rain from falling into the chimney. Such turncaps are well known and are very old in the art, and several types are even claimed to produce additional advantages with respect to the chimney draught and other parameters and phenomena. It is a general problem, however, that the humid smoke gas produces a considerable amount of water condensation on the inside of the hood member, and the water dripping down from the hood causes more than one type of damage to the chimney. In some known turncap designs guide means are provided for draining off the water at some circumferential point of the turncap, whereby the water may be held away from the chimney tube, but the resulting discharge of sooty water along the outside of the chimney obviously shows its own type of disadvantage.
It is the purpose of the invention to provide a chimney turncap structure which eliminates the above mentioned problems of the condensed water which may flow down either into the chimney tube or along the outside of the chimney.
The invention is based on the cognition that in usual firing and chimney systems the top area of the chimney and therewith the turncap structure itself receives not only a flow of humid smoke gas, but also a considerable amount of heat energy from the smoke gas and from the underlying heated portions of the chimney, and that the heat energy hereby available at the top of the chimney is more than enough for causing the condensed water to evaporates, when care is taken to cause the water to be collected in a water collector, located so as to be pronounced, subjected to the heat adjacent the top end of the chimney.
In accordance with advantageous features of the present invention, a chimney turncap is provided which includes a hood member having vane means so as to enable a positioning thereof in accordance with the wind direction. The hood member generally covers the chimney opening so as to receive smoke therefrom and to cause the smoke to be horizontally diverted through a lateral opening in the hood. Guide means are provided inside of the hood for guiding condensed water from an inner surface of the hood down to a water outlet. A water collector communicates with the water outlet and is mounted in a warm top zone of the chimney in such a manner that the condensed water, continually supplied into the water collector, is evaporated therefrom by a natural heat of the chimney and the smoke gas without the water overflowing the water collector.
The hood member should be designed so as to promote the heating of the water collector rather than immediately letting away the heat with the wind. In order to obtain this it is a outstanding additional feature of the invention that the hood member may be designed as a semitubular shell member having an upwardly converging cross section and having its said vane means located in such a manner that the natural position of the hood member is crosswise to the wind direction, i.e. such that the hood is closed both windwardly and leewardly as well as upwardly, but open at both opposed ends of the transversely oriented semitubular shell member. This design, as more fully explained below, has proved to be very advantageous in several respects, also with respect to both the primary purpose of the turncap and the accumulation of the heat energy as necessary for evaporating the condensed water.
In a preferred embodiment the cross section of the semitubular hood is as an inverted V, whereby the condensed water may flow down along the inner sides without dripping down therefrom, and the water is easily collectable by lower drain means communicating with the said water collector.
The water collector is preferably rigidly associated with the hood itself, e.g. shaped as a narrow tray tra
REFERENCES:
patent: 439494 (1890-10-01), Eurich
patent: 720210 (1903-02-01), Wunderlich
patent: 846446 (1907-03-01), Ball
patent: 1626002 (1927-04-01), Lobit
patent: 2766678 (1956-10-01), Morris
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