FR2666404A1 - IMPROVEMENTS ON THE HEATING BODIES FOR MIXED BOILERS. - Google Patents

Abstract

The heat exchanger for a combination hot-water boiler comprises rectilinear sections (1, 2) juxtaposed two by two and forming part respectively of two separate pipes, the double sections obtained (T) being mounted parallel to one another with transverse metal plates (3) interposed. The outlets of the two rectilinear sections making up each double section are staggered in relation to one another, thus defining a long end (A) and a short end (B), and there is provided at each end of the bundle of double sections a connection box (4), the interior of which is divided into two stages (41, 42) assigned respectively to the two pipes by exclusive impermeable connection to these two stages respectively of the long ends (A) and of the short ends (B), each stage itself being subdivided into compartments (411, 412 etc.; 421, 422 etc.) each assigned to the individual connection of two rectilinear sections forming part of the same pipe.

Description

I improvements to heating bodies For mixed boilers.

  The invention relates to heating bodies equipping mixed hot water boilers, that is to say intended to heat water in two conduits forming respectively part of a closed central heating circuit and a circuit of hot water for cooking, toilet water as well

  drawn from being called "sanitary water" in what follows.

  It targets more particularly, among these heating bodies, those for which the two water pipes

  hot respectively include straight sections

  lines juxtaposed two by two, the double sections obtained being mounted parallel to each other with the interposition of transverse metal plates forming both spacers and exchange fins

  thermal, the consecutive straight sections of cha-

  that conduit being connected two by two at the ends

  of these sections using appropriate fittings.

  In the known embodiments of these heating bodies, the fittings in question are generally tubular bends in a U-shape: see by

  example FRANCE patent born 1 332 607.

  The manufacture of these elbows and their assembly

  watertight to straight sections to be connected to each other-

  are delicate and expensive, especially when the profile

  of said sections differs from the circle.

  The object of the invention is, above all, to improve these mutual connections from the point of view in particular of the simplicity of manufacture, of sealing and of longevity. For this purpose, the heaters of the kind in

  question according to the invention are essentially charac-

  terrified in that the mouths of the two sections

  straight lines making up each double section are shifted

  lined longitudinally with respect to each other, thus defining a long end and a short end and in that there is provided at each end of the bundle composed by the double parallel sections a transverse connection box the interior of which is divided into two stages assigned respectively to the two conduits by exclusive watertight connection to these two stages respectively of the long ends and of the short ends defined above, each stage

  being itself subdivided into compartments assigned each

  cun to the individual connection of a rectilinear section to the contiguous rectilinear section forming part of the same conduit. In preferred embodiments, we have

  in addition to one and / or the other of the provisions

  following sections: the current portion of each double section

  is in the form of a cylinder whose direction

  trice is a continuous closed curve C symmetrical with respect to a longitudinal vertical plane, each double section is arranged so as to present a transverse contour extending along curve C, not only at the end of each of its short ends, but also at the end of each of its long ends, and the housing is hollowed out in its wall arranged on the side of the sections and in its intermediate partition separating the two stages, by lights whose edge extends along curve C, lights adapted to receive joint ends, respectively, of the Coptic ends and the ends of long ends,

  the housing consists of two half

  metal shells with flared edges towards the former

  are reported against each other with inter-

  position of a perforated plate constituting the intermediate partition, double bosses formed in the side wall of the housing define inside this

  housing of the grooves serving as housings contiguous to the edges of planar partitions delimiting the various compartments of this housing.

  The invention includes, apart from these main provisions, certain other provisions which are preferably used at the same time and which will be more explicitly discussed below. In the following, a mode will be described preferred embodiment of the invention with reference to

  attached drawings of course in a nonlimiting manner. Figure 1 of these drawings shows schematically

  For the purposes of explanation only, a portion of a heating body for a mixed boiler established according to the invention

  tion. FIG. 2 shows in section on II-II FIG. 3 a portion of such a heating body established according to the

vention.

  Figures 3 and 4 are cross-sections of the figure

2 according to III-III and according to IV-IV.

  Finally, Figure 5 is a partial section of Figure 3 along V-V.

  In a manner known per se, the heating body considered here is intended to equip a mixed boiler,

  that is to say suitable for heating water circulating in two separate circuits, namely a first closed central heating circuit comprising in particular radiators and a circulation pump and a circuit for drawing sanitary water .

  Each of these circuits includes, in the heating body, a duct intended to receive the calories

  from the combustion of a suitable, generally gaseous, fuel.

  One of these conduits, which is assigned to central heating, comprises a plurality of elementary rectilinear sections 1, and the other, assigned to heating domestic water, comprises a plurality of

straight sections 2.

  In a manner still known per se, the sections 1 and 2 are joined in pairs, each pair forming a double T section.

  These double T sections are arranged parallel-

  each other with interposition of plates

  cross 3 forming both spacers and fin

  your heat exchange, all of these sections and

  of these fins forming a kind of general grid

  ralement horizontally arranged above the flames generated by the boiler burner, so as to be traversed by the corresponding hot gases and

  collect the calories they carry.

  The invention relates more particularly to the mutual connections of the ends of the sections T. These connections are obtained here by implementing the following arrangements: one is offset longitudinally relative to

  to the other the mouths of the two sections 1 and 2 including

  laying the same double T section, which defines at each end of double section a long end A and a short end B,

  and there is provision at each end of the beam

  tubular skin made up of double sections T pa-

  connect a cross connection box 4.

  The interior of this box 4 is divided by a transverse intermediate partition 5 into two stages 41 and 42 juxtaposed in the longitudinal direction of the double sections T.

  These two stages 41 and 42 are assigned respec-

  the connection of the sections 1 making up the heating duct and that of the sections 2 making up

the drawing pipe.

  To this end, the long A and short B ends defined above are respectively connected to these two stages 4 and 42 ′. More precisely, each assembly composed of a long end A and a short end B juxtaposed one

  against the other crosses a light 6 contiguously

  additional hollowed out in the transverse wall 7, of the housing 4, disposed on the side of the sections T and is tightly connected to the edge of this lumen, in particular by welding, each long end A also crosses

  right through the floor 42 then, joined, a light

  additional 8 hollow hollowed out in partition 5 and is

  tightly connected to the edge of this light 8, no-

especially by welding.

  In addition, each floor 41 '42 is subdivided into

  compartments 411 '412 421' 422 'which are aff-

  each connected to the individual connection of a straight section 1 or 2 to the adjoining straight section 1 or 2

being part of the same conduit.

  This subdivision into compartments is carried out

  using flat partitions 9,10 which extend parallel-

  along the longitudinal direction of the double T sections. As clearly visible in FIG. 1, in each

  common compartments open out into two rec-

  elementary tilines 1 or 2, i.e. a rear section

  vee of water and a section of water departure.

  The partitions 9 and 10 which line respectively-

  the two stages 41 and 42 are preferably alternately

  born transversely, as illustrated, but such

work-study is not essential.

  After establishment of the respective connections

  between the different sections 1 and 2 in the ex-

  plicitée above, the circulation of the water in these various sections can be carried out according to the arrows F 1 and F 2 for each of the two conduits from one end to the other of the heating body, the arrows F 1 corresponding here with heating water and arrows F 2, with sanitary water. In the example illustrated, the circulations are against the current, but they could also

  be provided with currents of the same direction.

  We also see in Figure 1 that the comparison

  timent 411 corresponding to one end of the housing 4 exclusively serves a straight section 1: it is assigned to the arrival of the heating water in the heating body, which is introduced into this compartment

4 it through a tip 11.

  In the embodiment which has been illustrated in FIGS. 2 to 5, the current portion of each double T section is in the form of a cylinder whose directrix is a continuous closed curve C (FIGS. 4 and 5) not having no inside corner and

  symmetrical about a longitudinal vertical plane.

  This curve C advantageously has the form

general of a flattened ellipse.

  In this case, the profile of each of the two sections

  straight lessons 1 and 2 corresponds to one half of the pro-

  overall thread, lying on one side of the major axis of said curve.

  As can be seen in FIG. 4, such a profile, in

  D-shaped, has angular points and is dif-

  difficulty in obtaining a tight connection between the perimeter

  of a part thus profiled and an additional opening hollowed out in a sheet.

  This is why, according to an advantageous arrangement of the invention, each sealed assembly is produced between a light (6,8) hollowed out in a wall or partition (7,5) of the housing 4 and an end (A, B ) of section introduced into this light according to a continuous curve without angular point having exactly the

  shape and dimensions of curve C above.

  This result is obtained automatically at the level

  lights 6, since the double T sections are

core complete at this level.

  To get the same result at the level of the

  miers 8 passing through the intermediate partition 5, the long ends A are deformed so as to restore the desired profile at the right of its mouth, as well as

visible in Figures 1 to 4.

  To this end, preferably, the procedure is as follows. The double T sections are established as explained in the patent application FRANCE no.

  89 04609 of the plaintiff in the sense that each section

  double lesson includes in its middle area a metal blade

  lique 12 studded with bosses 13 whose summits come

  come into contact with the facing external walls 14

(figure 5).

  We then fold outwards each portion 121 of the central metal blade 12, which extends longitudinally beyond the short end B and the edge of this folded inclined face is deformed so as to give it the profile of half of the overall contour of the section T. Under these conditions, each of the openings 6 and

  8 hollowed out in partitions 7 and 5 and intended to receive

  jointly see a long end A or short B of tubular section, has an elliptical or similar contour which is relatively easy to form and along

  from which a bond can be obtained by welding or the like

its very waterproof.

  We also see in FIGS. 2, 3 and 4, bosses 15 formed in pairs in the side walls of the housing 4 and defining between them grooves suitable for receiving contiguous edges of partitions 9 or 10,

  in the same figures 2, 3 and 4, the consti-

  tution of the bootmaker 4 in two half-shells 16 and 17 having flared edges 18 brought against each other with the interposition of the intermediate partition 5,

  in FIGS. 2, 3 and 5, an embodiment of

  spacing plates 3, which are advantageously

  suitably constituted by thin sheets of stainless steel, the surface of which is dotted with punctured or semi-cut portions 19 forming channels with discontinuous walls which have a good heat exchange surface without opposing a high pressure drop to the hot gases, calories must be

transmitted to the water to be heated.

  In general, and as said above, the entire heating body extends horizontally and so does

  the same for each of the two side boxes 4.

  In other words, the largest dimension of each box, parallel to the intermediate partitions 5,

  extends from the front to the back of the boiler.

  Advantage is taken of this orientation

  tion to open horizontally backwards

  of the heating body all four of the fittings

serving it as water.

  Thus the compartment 411 in which the heating water is admitted is connected to such a rear connection there by a tube 20 (Figures 2 and 3) passing through

  horizontally all the partitions 9 and that the compar-

  timent 42 N (not shown, N denoting the number of compartments dp housing 4 considered assigned to the water of

  is also served by such a rear connection

laugh 21.

  This measure makes it very easy to connect the heating element, like a drawer, to

  pipes pending, by simple horizontal movement

  zontal of this body towards the rear, so as to make the end pieces 11 and 20 cooperate with complementary end pieces provided at the ends of said pipes 5 and fitted with appropriate seals.

  As a result of this, and whatever the embodiment adopted, there are finally heating bodies for mixed boilers whose constitution results sufficiently from the above.10 These heating bodies have many advantages over those previously known. ,

  particularly with regard to the simplicity of manufacture, the tightness and the robustness. As it goes without saying, and as it results from

  their already from the foregoing, the invention is in no way limited to those of its modes of application and implementation.

  which have been more specifically contemplated; on the contrary, it embraces all its variants.

Claims (4)

  1 Heating body for a mixed hot water boiler intended to heat water in two separate conduits comprising rectilinear sections (1,2) juxtaposed two by two being respectively part of the two conduits, the double sections obtained (T) being   mounted parallel to each other with interposi-   tion of transverse metal plates (3), the consecutive rectilinear sections of each duct being connected in pairs at their ends using   suitable fittings, characterized in that the fittings   chures of the two rectilinear sections (1,2) component   each double section (T) are offset longitudinally-   ment with respect to each other, thus defining a long end (A) and a short end (B) and in that there is provided at each end of the bundle composed by the double parallel sections (T) a housing transverse connection (4) of which the interior   is divided into two floors (41,42) assigned respectively-   long ends (A) and short ends (B) defined above, each stage being itself subdivided into compartments by means of an exclusive watertight connection to these two stages respectively   (411 '412; 421' 422 '' -) each assigned to the connection-   individual ment from a straight section to the section   contiguous rectilinear part of the same duct.   2 heating element according to claim 1, characterized in that the current portion of each   double section (T) is in the form of a cylinder   dre whose directrix is a continuous closed curve C symmetrical with respect to a longitudinal vertical plane, in that each double section (T) is arranged so as to present a transverse contour extending along curve C, not only at the level of the end of each of its short ends (B), but also at the level of the 1 1 end of each of its long ends (A), and in that the housing (4) is hollowed out in its wall (7) disposed on the side of the sections and in its intermediate partition (5) separating the two floors, by slots (6, 8) whose edge extends along curve C, slots suitable for receiving the ends together, respectively   of short ends and the ends of long ends.   3 Heating body according to any one of   Claims 1 and 2, characterized in that the housing   (4) is constituted by two metal half-shells (16,17) whose edges (18) flared outward are attached one against the other with the interposition of a perforated plate constituting the intermediate partition (5) . 4 Heating body according to any one of   previous claims, characterized in that   double bosses (15) formed in the side wall of the housing (4) define inside this housing grooves serving as housings contiguous to the edges of   flat partitions (9,10) delimiting the different com- Partitions of this bootmaker.   Heating element according to any one of   previous claims, characterized in that its   different connection ends (11,20) to the cana-   external water supply connections all open horizontally, and parallel to each other, towards the rear of said body.