FR2512190A3 - BOILER ELEMENT HAVING SPECIAL PROFILE THERMAL EXCHANGE FINS - Google Patents

Abstract

THIS POLYCOMBUSTIBLE CAST IRON BOILER COMPONENT IS AT LEAST PART OF THE WATER TO BE REHEATED. IT INCLUDES FINS 7 PROVIDED ON AT LEAST OF ITS FACES, THE SAID FINS HAVING A CROSS-SECTION, PREFERABLY LENTICULAR, MORE OR LESS BENT TO OPPOSE A LOW RESISTANCE TO THE CIRCULATION OF FUMES, WHILE BEING PRACTICALLY LICKED. THE INVENTION CAN BE USED FOR ANY TYPE OF BOILER.

Description

-1-2512190

  The present invention relates to a heating element

  equipped with special profile heat exchange fins.

  This element, partly traversed at least by water to be heated, is intended to form with other similar elements juxtaposed and hydraulically connected, a heating boiler In a known manner, the elements together delineate passages between them for the fumes from the combustion chamber, and in these passages, fins forming a body with said eleven elements, protrude and have the role of transmitting the key

  said fumes to the water to be heated.

  The object of the present invention is to provide a cast iron boiler element, at least partially traversed by the water to be heated and lined with fins; said element, in consequence notamn of the configuration and particular arrangement of its fins,

  allowing to obtain a very high yield.

  The boiler element according to the invention is characterized (essentially in that its fins have a profiled transverse section, preferably lenticular, to oppose a low resistance to the movement of fumes, to be fully licked (

by these.

  Preferably, the fins have a lenticular section which decreases from the base to the free end

of the fin.

  Advantageously, to use throughout the

  as far as possible, the heat generated by the fumes, the

  are arranged offset in the vertical direction E while the fins belonging to alternate rows are

  convergent alignment, although not necessarily, at one point.

  To fix the object of the invention, without however linter, in the accompanying drawings: Figure 1 is a side view of a boiler element according to the invention; Figure 2 is a sectional view along line A A of Figure 1; Figure 3 is a sectional view along the line C C of Figure 1

  Referring to the figures of the drawings, we see a

  Boiler (1) according to the invention, made of cast iron, with a hollow interior structure for the greater part of its profile, in order to allow the circulation of the water which penetrates it by 2 -

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  via a lower connection (2), which escapes from it after having been reheated, by means of an upper connection (3) arranged diagonally with respect to said lower connection (2). The cavity filled with water element (1) is indicated by the reference

(4).

  When the boiler element considered constitutes, as illustrated in FIG. 2 of the appended drawings, an intermediate element interposed between two contiguous elements (X and Y), this element is judiciously established to delimit, in part, the chamber of combustion (4) of the boiler Therefore, the element (1) has, on two of its sides, prominent ribs

  (5 and 6) whose function is to delimit laterally the

  generated within the combustion chamber (4) and escaping upwards, along the passages (M) formed between the adjacent elements of the boiler The fumes evacuating from above, through said passages (M), are fed to a collector of a known type, indicated schematically by the reference letter

(Z ') of Figure 1.

  Heat exchange fins (7) extend from the

  boiler elements to protrude into the passages (M) In the intermediate boiler elements, these fins (7) are

  provided on the two opposite sides (Figure 2) of the element, tan-

  say that in the two terminal or end elements, only

  the inner faces of these elements are equipped with fins.

  These aforementioned fins have a contoured configuration with a lenticular cross-section which decreases

  from the base of the winglet to its free end.

  aerodynamic management of said fins results in

  create a curved surface that is completely licked by the fumes,

  which increases the efficiency of the temperature exchange.

  To avoid that, in their ascending circulation, the

  fumes do not follow direct paths between the combustion chamber

  tion (4) and the collector (Z '), which would result in heat loss through the chimney, it was expected that the fins of a row (row K, for example) would be

  offset from the fins of the adjacent rows (the rows

  In addition, the vanes are aligned in columns (V and W, for example), and offset while converging upwards, preferably at a point on a vertical axis.

  intermediate (F) o are the fins vertical axis.

  This arrangement illustrated in FIG. 1, notably allows easy cleaning of the boiler elements since the fins delimit between them oblique channels (arrows D and E), along which it is easy to circulate a disassembled tool: to clean adequately each of said fins. The two lateral elements of the boiler which cooperate with the intermediate elements shown in detail in the drawings, are different from the latter, in that they comprise only fins on their inner face and that they extend downwards to constitute the base, as illustrated by the broken line of the lower part of Figure 1 These side elements substantially and laterally delimit the combustion chamber (4) and are, in the known manner, provided with eyelets for the passage of usual tie rods used to assemble el

  simultaneously tighten the various elements of the boiler.

  It should also be noted that the gas burners of known type are provided at the lower part of the combustion chamber (4), in particular at the line (G), while the secondary air is admitted into said room (4), through a

  profile (10) provided for this purpose on one side of the intermediate elements.

  diaries. The invention is in no way limited to that of these modes of application, nor to those of the embodiments of this various parts which have more especially been indicated; she

  on the contrary, embraces all variants.

3 - -4 -

Claims (6)

R E V E N D I C A T IO N S   -1 boiler element partially traversed by water to be heated and lined with fins (7) on at least one of its faces,   characterized in that said fins have a transverse section   dirty profiled, including lenticular, whose section is more or less bulged to allow to oppose a low resistance to the flow of fumes and to be practically licked completely, by them.   -2 element according to claim 1, characterized in that the cross section of each fin is decreasing   from its base to its free end.   Element according to claims 1 and 2, characterized   in that the fins (7) are arranged in rows such that the fins of a row (K) are offset or not with respect to   fins of adjoining rows (R) and (T).   -4 Element according to claims 1, 2, 3, characterized   in that the fins (7) are arranged in columns (V) and (W)   in a convergent or parallel alignment.   Element according to claims 1, 2, 3 and 4, characterized   characterized in that the lateral end elements of the boiler comprise fins provided only on one face, said   end elements enclosing on two sides, the chamber of bustion (4).   Element according to claims 1, 2, 3, 4 and 5,   characterized in that, on a lateral part, the inter-   (1) have a smaller side (10) to allow   the access of secondary air into the combustion chamber (4).