FR2468841A1 - HEATING APPARATUS COMPRISING CORRUGATED WALLS AND A FLAME DIFFUSER DIVIDING THE FIREPLACE - Google Patents

Abstract

The heating stove according to the present invention comprises a casing 2, a hearth 11, side walls 12, 12 ', a rear wall 13, 13', a flue 19, a flame diffuser 20, a fan 24, the walls 12, 12 ', 13, 13' comprising folds or corrugations 44 and the flame diffuser located some distance from the load doors 9 and dividing the hearth 11 into a space 51 serving as a hearth and a space 52 located at the - above the diffuser.

Description

"Heating appliance."

The invention relates to a heat stove, intended for heating the air flows which circulate inside the

  stove. The device includes an envelope and a fireplace

  ture, fitted in the envelope and equipped with loading doors or similar openings. The hearth is at least limited by side walls arranged in the envelope itself, and possibly by a rear wall. The stove is also equipped with a flue for the evacuation of flue gases and a flame diffuser, the front edge of which is curved in the direction of the load doors or similar openings. The flame spreader is placed in the part

upper part of the fireplace, slightly below the flue.

  The stove is also equipped with a fan, the task of which

  consists in increasing the air circulation through the stove.

Despite the existence of a large number of various stoves on the market and despite the multiple projects of stoves of similar models in recent times, the need for a stove according to the invented model does exist. This stove must not only demonstrate high efficiency but, on the one hand, know how to eliminate the risk of cracking of the stove, especially near the fireplace, on the other hand, know how to reduce or

  virtually eliminate emissions of toxic gases, substances

these and other materials contained in the flue gases. Furthermore, it will be desirable to avoid the use of insulating materials in stoves and especially in stoves whose

hot air system is fan controlled.

  Most stoves on the market today require

  the use of insulating materials to avoid excessively high temperatures

peratures on the outside surface of the stove. During the

installation of these insulators, the assembly personnel were

  time of rash and itching caused by the insulating material. It has also been shown that during operation of the fan-controlled hot air system, fibers from the insulating materials escape and diffuse into the rooms heated by the stove. The smoke flue is installed above the fireplace; he is surrounded by

  an additional coat, kept at a certain distance.

This coat helps warm the ambient air in circulation.

  tion. Therefore the temperature of the flue gas is higher and the upward flow of the flue gases, i.e. the draft, is stronger than when it is for example an open fire . The evacuation of the flue gases to the outside is therefore faster, while the fire burns violently in this case, which in turn means poor exploitation of the heat energy of the fuel and

  hot smoke gases. But above all it involves a combustion-

partial tion, and causes high-rate emissions of toxic gases, various substances, etc. Stoves on the current market are also prone to cracking, especially in

  the walls of the hearth and this after a very brief period of

use. These disadvantages of conventional stoves are eliminated by the stove of the invention. The advantages of this stove are numerous. Thus, combustion is slowed down and the fire burns

calmly, while the flames are forced to turn

  yer in the hearth, being extended by a diffuser

  flames. The shape given to the hearth also contributes to multiple

  multiply the number of flames. By making better use of the combustion material and the flames, a significant fuel saving can be achieved. At the same time, the heat flow

is higher than with a conventional stove, soaring and quan-

equal combustion material. In a conventional stove, the agitated flames quickly move towards the flue, where the flue gases escape immediately. The stove of the invention therefore allows a certain amount of fuel to generate more heat energy for heating the rooms. In addition, this phenomenon makes it possible to design the stove in small dimensions, with a hearth little

spacious, to cover special needs. Combus-

  slow tion of the materials, the extent of the flames and their movements

  calm, but above all their range and high temperature cause the toxic combustion gases to be burned in the hearth itself. The stove of the invention virtually eliminates any emission of toxic gases with the fumes. The use of heat energy from flue gases means that the temperature of these gases is relatively low

  high on broadcast. Using the stove as a chimney

  born on open fire, that is to say, without closing the tank doors

  ge or similar openings, we get a larger

  bit of radiant heat than with a conventional fireplace or stove. It is also possible to use the hot air circulation system at the same time. On this point the

  stove according to the present invention is characterized by the pre-

  presence of creases or undulations on at least one of the

  lateral kings of the fireplace or of the rear wall, if applicable. The

  flame spreader or its supports adheres to the rear wall

  re possible and on the side walls. The hearth is thus split in two: a part located below the flame diffuser will serve as a hearth and a part located above the

  Streamer. These two parts correspond by a shaped orifice

mé between the load doors (or similar openings) and the

  front edge of the flame spreader.

Another feature of this new stove is that the side walls and the rear wall

  possible of the hearth are constituted by an internal coating

  rieuri All the walls of the covering have folds or undulations.

  Another characteristic feature of the stove according to the pre-

  sente invention resides in the fact that the stove envelope is constituted by two protective sheets, preferably

  parallel and between which there is a layer of air.

Other features and benefits of this new

stove will appear during the description given below

  with reference to the attached drawings in which:

  - Figure 1 shows a stove built according to the pre-

  invention, with or without interior coating; - Figure 2 shows a cross section along

  II-II of Figure 1, the stove having a coating

completed; - Figure 3 is a cross section of a coated stove according to a second embodiment; Figures 4 - 6 show a top view of certain parts of a coat, in particular the side walls and the rear wall, the lower and upper sides - Figures 7 and 8 are a side view and a top view of a coat with mounted smoke and air ducts

and with a partially assembled fresh air duct.

  FIG. 1 represents a stove 1 with an envelope 2. This

  envelope (see also Figure 2) has a rear side

re 5, lateral sides 6, an upper side 7, a front side 8, load doors 9 or similar openings, as well as a support 10. The support may consist of a leg,

  by a sheet metal structure with base or by another cons-

truction. The sides mentioned 5, 6, 7, 8 consist of two protective sheets, arranged at a certain distance one

  on the other and preferably parallel 3,4. A metal sheet

  that forms, for example, the exterior 3 of the envelope and an aluminum sheet 4 the interior. The side faces of the sheet facing the interior of the stove are reflective. Between

  the protective sheets 3,4 is an air layer (34).

  It is not necessary to use a special insulating material.

so that the exterior surfaces of the stove do not heat up

not, because experience shows that this model with protective sheets

these doubles provide the stove with a more than adequate exterior

  fresh. The absence of insulating materials allows, in addition

  advantages already mentioned in the introduction,

change the weight of the stove.

  The stove then has a hearth 11, which in turn has side walls 12,12 ', a rear wall 13, 13', an upper side 14 and a lower side 15, 15 ', plus any front pieces 16. We see in the figures

  that the hearth is constituted by a mantle 55, a metal sheet

  angled panel 45 (see FIG. 4), preferably in one piece, which forms the side walls 12 and the rear wall 13, the upper side 14 and the lower side 15 (see FIGS. 5-6). These walls are assembled by welding in an argon atmosphere, for example, and form a space

capable of being closed by load doors or open-

analogous tures. At least one of the side walls 12 or the wall

2 4 8 8 41

  rear 13 or preferably all of these walls have folds or corrugations 44, this to avoid cracking

fireplace. When heating, the walls benefit from an ef-

  fet "accordion", and they can expand under heat without distorting the walls and joints too much. The anterior ledge

  laughing of the side walls 12 adheres by parts 46 mura-

  narrow at the front of the stove or screed 2.

The other wall parts are at a certain distance from the casing 2 of the stove, where space 37 is provided for

the air circulation to be heated. In order to allow feeding

  tation in fresh air from the fire, an orifice 48 is formed in the

  lower wall 15. The upper wall 14 also has

  an orifice 47, allowing the evacuation of the flue gases.

This orifice is connected to a smoke duct 19.

  In order to obtain greater security and in order to make possible the exchange of certain parts subject to intense wear, the hearth 11 or part of the hearth, and the hearth 56 can be equipped with an interior covering 17 connected to the

  side walls 12 of the mantle 55 by its extreme edges 18.

According to FIG. 2, the covering has folds or undulations-

  tion 44 'corresponding to the folds or undulations 44 of the coat.

  Its side walls 12 'and its rear wall 13' are however

  arranged at a certain distance from the mantle, in order to allow

  be the existence of a layer of air between the mantle and the

clothing. The coating 17 can be connected to the diffuser

flames 20 and extend to the bottom wall 15 or

than ashtray 33.

  Figure 3 shows us a coating 17 of a slightly different design. So this coating adheres to a line

  of folds 54 out of two on the side walls 12 of the mantle 55.

to leave a layer of air in between. The pa-

  rear kings of mantle 13 and covering 13 'can receive

  see similar folds. The opening 21 of the flame diffuser

  mes 20 is here circular. By practicing an open-

  square or quadrangular, we can save

  material with regard to the regulation key 22.

The flame spreader 20 or its supports adheres closely

ment to the rear wall 13, 13 'and the side walls 12, 12', but does not come into contact with the load doors 9 or similar openings along the side walls. It shares the hearth 11 in a lower part 51 situated under the flame diffuser, intended to serve as a hearth 56 and in an upper part 52 situated above the flame diffuser. These two parts correspond by means of an orifice

53, formed between the load doors 9 of the analog openings

gues (front parts of the stove) and the front edge 26

  of the flame spreader 20. The diffuser forces the flames

  my to spin; they then rotate

roof to hearth 56 below, while amplifying and slowing down

  weaving their movements. An inclined edge 24 shaped on the

  front edge 26 of the flame spreader can possibly-

  help to force the flames to carry out a

  descending and forces the smoke gases to make a detour.

  A similar rim 25 but curved upwards can be

  useful on the adjustment bar 23 of the regulation key 22.

As already mentioned, the flame spreader has a

  regulation key 22, which is used to start the flame

open. Then, this key is closed and it remains closed during

the stove is working. We obtain flames of large and calm movements, if the key is left slightly open, but it obviously follows a loss of heat,

  which escapes directly through the flue 19.

  The flames and the smoke gases are trapped in the hearth 56, located under the flame diffuser 20, if the regulation key 22 is closed and if the smoke gases communicate

  with the upper part 52 and with the uniform flue

only through orifice 53. The flame diffuser 20. can be made of thin sheet metal with hemmed edges. It can be embedded in its supports 50, in a hollow fold of the same size. The regulation key 22 can be designed as a second sheet or protective plate, which can slide

over the flame spreader.

  The upper wall 14 of the mantle is located at a certain distance from the upper side 7 of the envelope 2 so

to create a space between the screed and the mantle 38 o cir-

air flows to cool the surfaces and the flue 19. Thus, a second casing 32 is installed around the flue. This envelope, which begins near the envelope 2 forms between its inner surface and the smoke duct a channel 39 intended - the circulation of the heated air in the stove. The second envelope 32 has one or more outlets 40 for the circulation of the heated air. These outlets can communicate with the piping to transport the heated air to other rooms. To better cool the flue pipe and to better exploit the heat energy, the flue pipe can be fitted

  protruding flanges 49 over its entire length (see Figure 8).

  The air to be heated is drawn towards the stove either by natural orifices in the support 10 of the stove, or by

  specially fitted openings in the lower part

re from the stove, (see arrows 41). Then, the air passes through the outer face of the mantle 55, by heating up in contact with the side walls 12, with the rear wall 13 if necessary,

of the upper wall 14 and also of the bottom wall 15.

Then the air also absorbs the heat from the outside

the flue and ends up coming out warm, in

  * another room or in connected pipes.

In order to obtain a faster air flow or a larger air flow for reheating, - a fan 27 is installed. The fan is preferably installed horizontally a little below the bottom 15 of the hearth in the 'envelope or in the support 10 of the pale. According to the principles

  of the invention, the number of revolutions of the fan 27 is pre-

  rule. The fan is also equipped with a device

  control 28, comprising a sensor element 29, which records

  be the ambient air temperature of stove 1, a card

  circuit 30 with conventional electronic control functions, as well as a bulb or thermometer 31 installed in the hearth 56

or between the reflective sheet and the hearth. It records the time-

  fire temperature. In this way, the fan can regulate the air circulation and maintain a given or predetermined temperature constant or practically constant, in the room where the stove is 1. Without the control device,

  too high a temperature is too easily obtained

  unpleasant wind in the room. The rear control device

  stops the fan when the fire is out.

  Between the flue 19 and the second envelope

  32 are arranged one or more fresh air ducts 35.

They communicate with the outside and go to the bottom 15 of the area or even below this bottom. They end up via a regulation key 36 in the hearth 11 which must be 56. Fresh air can also be allowed

  to emerge under the being and reach the fire by below

  under. The key 36 is actuated by an operating device 37. Thus, the fresh air is preheated. Arrows 42 show

the path taken by the fresh air towards the fire.

The flue gases pass through the orifice 53 in front of the flame diffuser 20 and in front of the upper part 52 of the hearth 11 and escape through the flue pipe 19 (see

arrows 43).

  It is possible to make modifications to the stove described in the context of the invention. Thus the shape given on the outside of the stove can differ depending on whether it is a corner stove, a built-in stove or a central stove. The

  hearth can be of different shape: the hearth and therefore

  that the coat and the covering may not have a rear wall; in this case the side walls are connected at an acute angle. The side walls can still

have a shape with multiple angles or a circular shape

  laire. By using a pleated interior covering according to the principles of the invention, it is not excluded to design a

coat stove without folds or ripples.

The fan can be controlled by thyristor, at a preset number of revolutions. The folds can be of different shape, for example in the form of waves. The stove described is therefore only a purely illustrative example

and not limiting.

24-5Q841

Claims (9)

R E V E N D I C A T I O N S 1.- Stove intended for the heating of the air which circulates there   and comprising a first envelope (2); a fireplace (11) placed in this envelope and comprising loads (9) and similar openings, and limited at least by lateral walls (12,12 ') arranged in the envelope and possibly by a rear wall (13,13'); a flue pipe (19) for the evacuation of flue gases; a flame spreader   (20), which has an anterior rim (26) curved di-   loading doors (9) or similar openings; as well as a fan (27) designed to increase the air flow, the abovementioned stove being characterized in that at least one of the walls (12,12 ', 13, 13') has folds or corrugations ( 44, 44 ') and that the flame spreader (20) or its supports (50) adhere to the rear wall (13,13') and to the side walls (12,12 ') but is located some distance from the doors load (9) or openings analogues and thus divides the hearth (11) into a lower space laughing (51), located below the flame diffuser (20) and intended to serve as being (56) and in an upper space (52) located above the flame diffuser (20), the upper and lower spaces (51 and 52) communicating through an orifice (53) formed between the load doors (9) or through an orifice (53) formed between the load doors (9) or ana- logues and the front edge (26) of the flame diffuser (20). 2.- stove according to claim 1, characterized in that the walls (12,12 ', 13, 13') are part of a coat (55) installed inside the envelope (2), this coat comprising, in addition to the side walls (12) and the possible rear wall (13), upper and lower walls (14, and 15) as well as any front pieces (16). 3. - stove according to claim 2, characterized in that the side walls (12) and the rear wall (13), if any, are provided with an internal coating (17),   which has folds or undulations (44 ') which correspond to   tooth mainly in the folds or undulations (44) of the walls lateral, and of the possible rear wall, said cover   interior (17) located either at a certain distance side walls (12) and the rear wall (13), where appropriate.   the, or partially in contact with these walls, the coating in the latter case, adhering to the walls only along   of a fold line (54) in two, for example. 4.- stove according to claim 1, characterized in that the walls (12 ', 13') consist of an inner coating (17), arranged in the hearth (56) or in the hearth (11). 5.- stove according to any one of claims 2, 3 or 4, characterized in that the walls (12,12 ', 13,   13 ') have folds or undulations (44 and / or 44').   6.- stove according to claims 2, or 3, character-   laughed at by the fact that the side walls (12) and the possible rear wall (13) consist of a bent metal sheet (45), preferably in one piece which adheres by its wall parts (46) relatively narrow to the part   front of the stove (1), the other walls being at a certain distance from the stove casing (2), as well as the   upper wall (14) which, in this case, may include some nes of the front pieces (16) mentioned. 7. A stove according to claim 1, characterized in that: a second envelope (32) is arranged around the flue pipe (19) projecting from the envelope (2),   this second envelope being intended to form between its sur- inside face and the smoke duct a duct (39) serving for the air flow circulating in the stove and which it is necessary to heat, said second envelope comprising one or more orifices   outlet (40) for the heated air. 8.- stove according to claim 7, characterized in that, between the flue pipe (19) and the second envelope (32), one or more fresh air pipes (35) are formed and communicate with the outside , these conduits extending below the bottom (15 ') of the hearth or hearth and   ending in the foyer (11) in front of the hearth (56). 9.- stove according to claims 1 or 7, characterized   by the fact that the number of revolutions of the fan (27) is preset and that this fan is equipped with a device for   control (28) comprising a sensor element (29), which registers   tre the air temperature outside the stove (1), a circuit board (30) comprising the necessary control functions, as well as a thernxZ [-tre (31) arranged near the hearth (56) and which records the temperature of the fire.   - Stove according to claim 1, characterized in that: the envelope (2) of the stove (1) consists of two protective t8les (3 and 4) arranged at a certain distance   one from the other and preferably parallel, between which is formed a layer of air (34) insulating.