EP1060352B1 - Heating furnace with gas and/or oil firing - Google Patents

Abstract

The invention relates to a heating oven (1) in particular with a gas and/or oil firing system. The heating oven comprises a combustion chamber (2) surrounded by heat storage elements, wherein respective first heat storage elements (3, 4; 27) are arranged at a first spacing parallel to respective walls (5, 6; 27) of the combustion chamber (2). Second heat storage elements (12, 14; 25) are arranged at a second spacing parallel to the respective outside of the first heat storage elements. The first spacing defines a first air channel (16, 17; 28) and the second spacing defines a second air channel (15, 18; 26) in each arrangement. The air in the first channel is heated by the walls of the combustion chamber, rises, cools down on the surrounding storage elements and sinks downwardly in the second air channel while giving up further energy to the heat storage elements. Thereafter, the cooled air again reaches the first air channel and the described flow cycle begins again in the heat exchanger.

Description

The invention relates to a heating furnace according to the preamble of Claim 1.

Known wood-burning stoves are used for wood burning generated heat supplied to a heat storage device. Around good heat exchange between those in wood burning resulting hot exhaust gases and the storage stones of the To achieve heat storage device, it is known that are called exhaust gases several times by the heat storage device to redirect the storage stones before they enter the fireplace reach.

Wood-burning stoves are very popular because of the type of dispensed Warmth is felt to be very pleasant. The air won't heated, but the walls and all solid bodies in the room are heated in particular by radiant heat. Likewise, Circulation of the air largely avoided, causing it to there is no further pollution of the air with dust. In addition remain the humidity and the balance between positive and negative ions, so that a healthy, natural indoor climate is created.

A disadvantage of wood-burning stoves is that they are used for their operation necessary amounts of wood a considerable space for the Require stocking. This place is especially at Terraced houses on small plots and at Apartment buildings are often not available.

From DE 26 50 053 A1 an oven is known, the Combustion chamber is surrounded by a heat-storing material. The combustion chamber can be liquid or gaseous Fuels are operated. With the cladding of the Combustion chamber with heat-storing material, such as in particular Chamotte, should be achieved that the Combustion process stored heat and is continuously emitted.

When burning heating gas, especially natural gas, Town gas, liquefied petroleum gas (propane, butane gas, etc.) or heating oil, considerable amounts of water vapor are generated. Since that heat-storing material in this well-known furnace is in direct contact with the combustion chamber the heat given off by the combustion immediately to the heat-storing Material removed. Therefore the combustion chamber only reaches very much slowly their final temperature, and this remains clear below 100 ° C. A temperature of 100 ° C or possibly still would also be due to the risk of burns to the Avoid operator on the heat-storing material. This however, requires that the water vapor in the burned heating gas condensed on the walls of the combustion chamber. The combustion chamber corrodes, becomes leaky, the heat-storing material soaked and the well-known stove gives moisture over that heat-storing material from the room to be heated.

DE 35 00 186 A1 is a heat store for Known wood tile stoves. This document deals with with the problem that conventional ceramic storage materials, like chamotte, have poor thermal conductivity. Therefore, with increasing thickness of the storage masonry, increasing storage capacity, an increasing delay the heat emission. In order even with large storage capacity, i.e. a large wall thickness of the storage material, one to achieve rapid and correspondingly good heat exchange, is proposed in the storage material metallic Embed thermal conduction elements. It is also provided that Heat storage, on its side facing the combustion chamber, to be provided with air ducts via which the Firebricks of the heat accumulator using hot exhaust gases Convection can be supplied from the combustion chamber. This is supposed to the heat emission from the combustion chamber to the storage material be improved.

A corresponding wood tiled stove would be heated with gas are, this well-known heat accumulator also soots because the Water vapor from the burned gas to the heat accumulator reached. This well-known wood tiled stove is not for one Heating with gas or oil provided still suitable for this.

DE 36 00 982 A1 describes a wood tiled stove for one Hot air heating known. A heating insert is with his Rear wall arranged directly on the wall of a room, see above that the heat of the heating insert is directly at the (cold) Wall is discharged. For immediate effectiveness at high To create storage capacity in this wood tiled stove, is proposed to store stones directly on the wall of the To arrange heating insert.

In analogy to the comments on DE 26 50 053 A1, the Arrangement of the heating insert on the wall of the to be heated Space result alone that the heating insert a Temperature of 100 ° C not reached. This The lowering of the temperature of the heating insert is due to that on it arranged storage stones only reinforced. Would this well-known wood tiled stove are now heated with gas, so would Water vapor on the heating insert and on the storage stones condense; finally water would come out of the oven.

DE-A1-33 41 481 is a further wood tiled stove known. To bring about a quick heating up of the room, in which the well-known wood tiled stove is located, it is proposed completely surround the combustion chamber with convection channels, so that it flows directly past the walls of the furnace Heavily heat the air and the room to be heated as an air flow can be supplied. Despite the good heat emission, they should External surfaces of the furnace facing away from the furnace strong convection flow in the convection channels only become moderately warm. In addition, the spacing of the Firebox from the tiles that cover the outer wall of the Form convection channels can be achieved that in Brackets held and thus easily released and from the oven can be removed. The over the convection channels from Fire chamber quickly dissipates heat into the room to be heated has the consequence that the firebox has a temperature of 100 ° C and not reached above. Would such a heater now simply be heated with gas, this would also be the case with this oven Condensation of water vapor on the walls of the combustion chamber and eventually water would come out of the oven.

AT 376 787 finally describes a wood tiled stove, which are ready to be put on the market and where elaborate setting of known wood tiled stoves is to be omitted. This is to be achieved by a double-shell design is provided in which the space between the inner shell and the outer shell only in the area of the room to be heated facing walls is filled with storage material. The The remaining area has air inlet openings at the bottom and at the top Air outlet openings for the heated air. At this known wood tiled stove is particularly disadvantageous in that. the air flowing in at the bottom and air flowing out at the top for one considerable, unfavorable air movement in the room to be heated worries. The advantageous concept of wood tiled stoves exists however, precisely in that the wood tiled stove Only emits heat to the environment via heat radiation. In addition has the well-known convection wood tiled stove, due to the low volume of storage material, only one low heat storage capacity. This well-known Wood tiled stove is therefore not able to last longer Give up heat after the wood fire has gone out. This well-known wood tiled stove is neither suitable nor intended to be heated with gas or oil.

The object of the present invention is in particular therein a functional heating furnace for gaseous or to create liquid fuels.

This task is carried out in a generic heating furnace those specified in the hallmark of the independent claim Features resolved.

Advantageous embodiments of the invention are in the dependent claims specified.

There is a combustion chamber in the heating furnace according to the invention provided, that of the surrounding him Heat storage bodies is largely gas-tight, so that the the combustion of heating gas or liquid fuels resulting exhaust gases and water vapor do not the heat storage body or not to the storage stones reach. Natural gas, city gas, Liquefied petroleum gas (propane and butane gas etc.), under oil, in particular Fuel oil, under alcohol, especially methanol and ethanol, and bio-alcohol, in particular rapeseed oil, which in addition to wood and coal as heating materials in one heater according to the invention can be used.

To give off the heat generated in the combustion chamber to the Heat storage bodies or storage stones are according to the invention Heat exchanger provided. The heat exchanger according to the invention consists of at least one wall of the combustion chamber, one Air duct and a heat storage body or one Storage stone. The between the inside of the Heat storage body and the wall of the combustion chamber Air heats up on the wall of the combustion chamber and rises in the Air duct up. This is from the wall of the Combustion and heat supplied to the combustion chamber by radiation on the wall of the combustion chamber opposite heat storage body emitted. After a Embodiment of the invention is advantageously a Sheet body used as a heat storage body, so in Heating oven according to the invention is arranged that its long Inside parallel to the expediently also flat wall of the combustion chamber.

According to a preferred embodiment of the invention closes the first heat exchanger to the outside of the stove towards a second heat exchanger. The second heat exchanger is through the outside of the heat storage body, a second Air duct and the inside of the heater are formed. At this Embodiment of the invention rises on the wall of the Combustion chamber heated air in the first air duct reaches the top to other, cooler heat storage bodies of the invention Heater and emits heat to it. This cools down Air warms up the wall of the combustion chamber and sinks in the second Air duct with further heat emission to the wall of the stove downward. The cool air below then heats up turn on the wall of the combustion chamber and the described Cyclic process begins again.

According to an advantageous embodiment of the invention, this is Arrangement not only on a single wall of the combustion chamber provided, but on all walls of the combustion chamber on which this is practical.

In an inexpensive embodiment of the invention The stove has a combustion chamber that is largely large has flat outer surfaces and / or with flat bodies for Heat storage is provided. Preferably, the Combustion chamber largely a box shape.

To ensure good heat emission from the hot flue gas to the Bringing the combustion chamber is, in one embodiment, the Invention in the combustion chamber a device for or repeated flue gas deflection provided. In a preferred one The embodiment is the combustion chamber made of metal or sheet metal manufactured, and the device for flue gas deflection exists from sheets, past which the flue gases are led to the chimney become. Of course, a combustion chamber can also be provided be made of stone, for example.

In a further embodiment of the invention, this closes a device for entering the flue gas outlet of the combustion chamber or multiple flue gas deflections. This flue gas deflection is expedient in the heating furnace according to the invention arranged. As a result, the hot flue gases remain in the longer Heater, which increases the efficiency of the heater. Likewise, one or several heat storage bodies can be provided. To one To achieve improved heat storage can also be achieved by the aforementioned heat exchanger assembly according to the invention in Area of the flue gas deflection.

In an advantageous embodiment of the invention Flow or air channel between the wall of the combustion chamber and the first heat storage body one or more heat conducting bodies provided that the heat from the wall of the combustion chamber in Guide the direction of the heat storage body. Preferably points the heat conducting body has a corrugated structure in whole or in part on, which is arranged in the air duct that a variety of Flow channels that arise, for example, across or are arranged perpendicular to the direction of flow and on which Air flows from bottom to top. Preferably, the corrugated structure made of metal or sheet metal and on the wall of the Combustion chamber attached. The heat-conducting body is preferred at least partially black to ensure good heat transfer between the heat-conducting body and the one flowing past it To allow air.

According to one embodiment of the invention, that is in the air duct arranged heat sink designed so that it has a distance to the heat storage body. If this is beneficial, However, the heat sink can also be designed so that it in whole or in part not only on the wall of the combustion chamber largely rests, but also largely on the wall of the Combustion chamber facing side of the opposite Heat storage body. For example, the heat sink the corrugated structure described on, so with vertical Arrangement of the resulting flow channels still air flow through the air duct.

To ensure easy assembly of the heat sink in the flow or To allow air duct, the heat sink on its the heat storage body or the wall of the combustion chamber facing side with a substantially flat plate be provided.

According to another advantageous development of the invention, is in the flow or air channel between the first Heat storage body and the second heat storage body second heat sink arranged. The arrangement can be in take place in a manner analogous to that in the case of the heat-conducting body in the first Air duct. The second is also preferred Thermally conductive body around a thermal conductive body as previously described.

In a preferred embodiment of the invention, the first heat storage body and / or the second Heat storage body substantially parallel to the wall of the Arranged combustion chamber and / or has essentially that Dimensions of the relevant wall of the combustion chamber. Preferably has the first and / or second heat storage body in the essentially the shape of a flat plate. To be a good one Achieving flow around is especially the first Heat storage body at its upper and / or lower end rounded.

In preferred embodiments of the invention, the first and / or the second heat storage body a thickness of approx. 30 to 120 mm and / or has the shape of a Sheet. According to a development of the invention, the first heat storage body, i.e. the heat storage body, the closer to the wall of the combustion chamber, thicker as the second heat storage body; preferably he has the double thickness.

According to a development of the invention, the first heat storage body and / or the second Heat storage body and / or the wall of the combustion chamber and / or the flue gas deflection is made entirely or partially of stone manufacture, in particular soapstone or chamotte or one Stone, which also has a high heat storage capacity and a has sufficient temperature resistance.

Furthermore, in an embodiment according to the invention or several temperature sensors, such as temperature-dependent Resistors in the inner and / or outer area of the heater intended. These survive at least partially heat resistant electrical cables with a Lighting regulation in connection. In addition, a Outside temperature sensor that measures the temperature outside the house measures, are used, the measured value in the regulation of the Firing comes on. This makes it possible to fire the lights then already put out of operation if for the concerned Adequate heat storage in the outside temperatures heating furnace according to the invention is present. With a gas or Oil firing can be a valve of the invention Firing control can be controlled so that the valve at falling below a set first, lower Temperature opens, so that the firing of the combustion chamber starts and when a second, higher temperature is reached closes and the firing of the combustion chamber is switched off.

As an alternative or in addition, it can be replaced by a Heating furnace according to the invention to be heated to more suitable Place a room thermostat provided with a temperature sensor be the actual room temperature with a preset temperature compares and the Firing control of the heater controls so that the Heating oven when the room temperature falls below the target temperature heated up and the lighting when the target temperature is reached is switched off.

In a further development according to the invention, a electronic simulation device provided. The Simulation device simulates this when burning wood crackling and crackling. This is preferably done Simulation using a semiconductor memory in which the corresponding sound sequence or several sound sequences are saved. The stored sound sequence or the Sound sequences are amplified and fed to a loudspeaker.

Fig. 1

einen erfindungsgemäßen Heizofen mit einer Gasfeuerung und einer Wärmespeichereinrichtung von vorne im Längsschnitt;

Fig. 2

den erfindungsgemäßen Heizofen der Fig. 1 von oben im Querschnitt;

Fig. 3

den erfindungsgemäßen Heizofen entsprechend der Fig. 1, der zusätzlich mit Wärmeleitkörpern an den Wänden des Brennraums versehen ist;

Fig. 4 u. 5

die Anordnung eines Wärmeleitkörpers in einem durch den inneren Wärmespeicherkörper und die Wand des Brennraums gebildeten Luft- bzw. Strömungskanal, entsprechend der Fig. 3, im Detail; und

Fig. 6

einen erfindungsgemäßen Brennraum zur Befeuerung mit Erdgas, teilweise im Längsschnitt und in schematisierter Darstellung; und

Fig. 7

eine erfindungsgemäße Abgasführung zur Verwendung für einen erfindungsgemäßen Heizofen im Querschnitt und in schematisierter Darstellung.

An embodiment of the heating furnace according to the invention is explained in more detail below with reference to drawings which are not necessarily to scale, the same or equivalent parts being provided with the same reference numerals and therefore not being explained again in more detail. Show it:

Fig. 1

a heating furnace according to the invention with a gas firing and a heat storage device from the front in longitudinal section;

Fig. 2

the heating furnace according to the invention of Figure 1 from above in cross section.

Fig. 3

the heating furnace according to the invention according to Figure 1, which is additionally provided with heat-conducting bodies on the walls of the combustion chamber;

Fig. 4 u. 5

the arrangement of a heat-conducting body in an air or flow channel formed by the inner heat storage body and the wall of the combustion chamber, according to FIG. 3, in detail; and

Fig. 6

a combustion chamber according to the invention for firing with natural gas, partly in longitudinal section and in a schematic representation; and

Fig. 7

an exhaust gas duct according to the invention for use for a heating furnace according to the invention in cross section and in a schematic representation.

Fig. 1 shows the heating furnace according to the invention from the front in Longitudinal section. The heating furnace 1 has in particular one tin-clad combustion chamber 2, two vertically arranged Area storage body 3 and 4, which are parallel to the left and right wall 5 and 6 of the combustion chamber 2 run on. Above the upper wall 7, which has a flue gas outlet 8 a surface storage body 9 parallel to the upper wall 7 intended. Below the lower wall 10 is a Area storage body 11 arranged. The area storage bodies 3, 4 and 9 are of surface storage bodies 12, 13 and 14 surround that this together with the area memory body 11th the combustion chamber 2 and the inner surface storage body 3, 4 and 9 completely enclose.

The area storage body 3 is thus between the left, outer Surface storage body 12 and the left wall 5 of the combustion chamber 2 arranged that a distance between each Area storage body 3 and the outer area storage body 12 and the area storage body 3 and the wall 5 of the Combustion chamber 2 is given. The area storage body 4 is likewise between the right outer area storage body 14 and the right wall 6 of the combustion chamber 2, wherein in each case a distance between the surface storage body 4 and the right, outer surface storage body 14 and the Surface storage body 4 and the right wall 6 of the combustion chamber 2 is present.

Because of the aforementioned distances according to the invention the left air ducts 15 and 16 and the right Air channels 17 and 18. The gas-fired, for example Combustion chamber 2 has hot walls 5 and 6 that let the air in inner channels 16 and 17 and the opposite Heat surface storage element 3 and 4. The warmed air flows upward, as through the ascending arrows indicated. Once at the top there is another upward flow prevented by the surface storage body 9 or 13. Under Heat is released to the surrounding storage body heated air to the outer heat storage body 12, 13 and 14, cools there with further heat dissipation to the Heat storage body and flows from the outer air channels 15 and 18 down, as indicated by the downward-pointing arrows. Downward is the air flow through the lower one Area storage body 11 limited, and the cooled air arrives again in the air channels 16 and 17, so that the Circular flow begins again.

Instead of gas firing, firing with oil, Coal or wood or a suitable combination of the above Firing types can be provided.

The combustion chamber or the combustion chamber 2 is preferably off Metal, in particular sheet metal, such as steel or stainless steel sheet, manufactured. Because the surrounding the combustion chamber Storage stones or storage body according to the invention at least are mainly arranged at a distance from the combustion chamber, the walls of the combustion chamber quickly reach a temperature of about 100 ° C and more. This is supported by according to the invention a combustion chamber, in particular a sheet metal combustion chamber, is used which only has a low mass or Has heat storage capacity. Through this invention Measures to quickly heat the walls of the combustion chamber it is achieved that the combustion of heating gas, oil, Coal, wood, etc., quickly evaporate heating the combustion chamber no longer on the walls condensed, d. H. after the walls of the combustion chamber one Reach temperature of over 100 ° C. The water vapor is over the flue gas outlet of the heater according to the invention outdoors dissipated. A water accumulation in the heating furnace according to the invention is effectively avoided.

This can be further supported by a Combustion control is used for fast Heating to about 100 ° C (for example, by first the maximum firing is set). Subsequently, then the firing until the target temperature of the Heating oven or the room to be heated, also in stages, be reduced.

It goes without saying that the combustion chamber instead of metal, Sheet metal etc. also made of stone or another material can be, if, in particular by a small wall thickness the combustion chamber, the walls of the combustion chamber are reached quickly brought to a temperature of about 100 ° C.

The combustion chamber according to the invention is preferably gas-tight designed to prevent exhaust gases or that at the Combustion of water vapor to the storage stones or get into the room to be heated.

According to the combustion chamber 2 at its upper end, in Area of the flue gas outlet 8, with a flue gas deflector 19 Mistake. Between the upper surface storage body 9 and the overlying further surface storage body 13 a distance is also provided. Preferably between Area storage body 9 and the area storage body 13 in Room 21 a thermal insulation 20, such as one or more Ceramic fiber mats and / or one or more layers Rock wool, provided. This can cause an undesirable Heat emission from the heating furnace via the surface storage body 13 be reduced upwards.

In another embodiment of the invention (not is shown) below the heat storage body 9 further heat storage body, preferably parallel to Heat storage body 9, at a distance from Heat storage body 9 arranged. In the air duct between the Heat storage body 9 and the further heat storage body preferably introduced a heat sink, the air duct completely or partially. The heat sink has for example, the corrugated structure described forms a plurality of flow channels and preferably consists of Sheet.

According to a further embodiment of the invention (not room 21 is not provided with thermal insulation, but with a heat sink of the type described completely or partially filled out. The other Heat storage body (not shown) according to the other Embodiment can also be provided.

The storage bodies are preferably Soapstone; however, it can also be another stone, the one sufficiently high heat storage capacity and Has temperature stability can be used.

FIG. 2 shows the heating furnace according to the invention from FIG. 1 from above in cross section. From left to right is the left, outer one Surface storage body 12, the left outer air duct 15, the left, inner area storage body 3, the left, inner Air duct 16, the left wall 5 of the combustion chamber 2, the combustion chamber or the combustion chamber 2, the right wall 6 of the combustion chamber 2, the right, inner air duct 17, the right, inner Disk storage body 4, the right outer air duct 18 and the right outer surface memory body 14 is shown. How 2 can be seen in the rear area of the heating furnace 1 according to the invention in an analogous manner Heat exchanger through the rear wall 24 of the combustion chamber 2, one rear inner air duct 28, a rear inner Surface storage body 27, a rear, outer air duct 26 and a rear outer surface storage body 25 is formed. There is also a window 29 in front of the Combustion chamber 2 is provided. To open the viewing window, the Frame a jack or the like.

FIG. 3 shows a further development according to the invention of FIG. 1 Shown furnace 1 shown in longitudinal section, in which the Walls of the combustion chamber 2 with a left heat-conducting body 33, an upper heat conducting body 32 and a right one Thermally conductive body 31 are provided. The heat sink preferably extend over the entire respective wall of the combustion chamber 2 and have a corrugated structure on which the air flows past and heats up.

Fig. 4 shows the arrangement of the left one shown in Fig. 3 Heat-conducting body 33 in the left inner air duct 16. For example, a heat-conducting body 33 is provided, which in the essentially half the distance between the left wall 5 of the combustion chamber 2 and the inner area storage body 3 occupies. The inner air duct 16 preferably has a width of approx. 30 mm, the area storage body 3 has a thickness of approx. 50 mm, the outer, left air duct 15 a width of about 25 mm and the left outer surface storage body 12 has a thickness of approx. 25 mm. To a largely unobstructed flow around the To allow area storage body 3 are the upper and the rounded lower end of the inner surface storage body 3 The same arrangement is preferably also used for the other vertically arranged walls of the combustion chamber 2 selected.

Fig. 5 shows the arrangement corresponding to Figure 4, in which the heat-conducting body 33 has a corrugated structure. The Thermally conductive body 33 is on left wall 5 of combustion chamber 2 arranged and the corrugated structure is transverse to Flow direction in the inner air duct 16. The heat conducting body 33 is on its inner heat storage body 3 facing Side provided with a thermal plate 51. It goes without saying that also a heat sink with a different structure can be used, and likewise the heat conducting body 33 not across, but along the direction of flow in the air duct 16 can be arranged. Such an arrangement can also for further walls of the combustion chamber 2 may be provided.

The combustion chamber according to the invention shown in FIG Natural gas firing points inside, at the bottom, a circumferential frame 60 on the inside of the Walls of the combustion chamber 2 or the combustion chamber is attached and preferably also consists of sheet metal. The surrounding frame 60 forms a preferably square or rectangular Recess and carries a gas permeable plate 61 which for example from a suitable gas concrete or another suitable, sponge-like material. Right away below the gas permeable plate 61 is one Distribution chamber 62 is provided. The top of the Distribution chamber 62 is essentially through the bottom the gas-permeable plate 61 and the underside thereof by the combustion chamber 2 completely closing down Sheet 77 formed. In the bottom of the distribution chamber 62, i.e. in which the distribution chamber 62 down closing plate 77, an opening is provided. To the A gas pipe is connected through the opening to the combustion chamber 2 from a gas line 63 via a gas valve 64 heating gas is fed.

The gas valve 64 has a piezo igniter 69 and one Adjustment button 70 for setting the combustion chamber 2 amount of heating gas supplied. The piezo igniter 69 is over an electrical line 72 connected to a piezo rod 75, which preferably frames 60 close to the gas permeable Plate 61 passes through (not shown). The top of the Piezo rod 75 is located just above the gas-permeable plate 61 in the combustion chamber 2. The gas valve 64 also leads via a pipeline 73 to a metallic one Pilot tube 67 gas too. The pilot tube 67 runs in approximately parallel to the piezo rod 75 through the frame 60 and its in The open end protruding into the combustion chamber 2 is the piezo rod 75 facing. Furthermore, a temperature sensor 66, such as in particular a temperature-dependent resistance wire Bimetal switch or the like. Provided, which is also on Frame 60 is arranged and slightly in the combustion chamber 2nd protrudes. The temperature sensor 66 stands with a electrical line 74 in connection with the gas valve 64.

When starting up the heating stove according to the invention Gas valve or the pressure reducer 64 via the gas line 63 Heating gas supplied. The gas valve 64 branches part of it supplied gas from the pilot tube 67, the open end of pilot light tube gas into combustion chamber 2 reached. When the piezo igniter 69 is actuated, jumps in electrical spark from piezo rod 75 to the metallic one Pilot tube 67 over and ignites that from the pilot tube 67 escaping gas. An ignition flame 76 is generated. Subsequently, the setting button 70 is used for heating provided gas flow of the heating furnace according to the invention set. That via the gas line 63 and the gas valve inflowing gas enters the distribution chamber 62 and rises through the gas permeable plate 61 into the combustion chamber 2, where it is ignited by the pilot flame 76; it creates one Heating flame over the entire gas-permeable plate, the largely corresponds to the flame of a wood fire. The Gas valve 64 checks via the temperature sensor 66, preferably somewhat delayed whether the gas supply into the combustion chamber 2 a Temperature increase of the temperature sensor 66 follows. Otherwise this is a sign that unburned gas in the Combustion chamber 2 flows. Possibly. the gas valve 64 provides the others Gas supply for a predetermined period of time. After this A new ignition attempt can be made for a predetermined period of time.

Alternatively or in addition to the adjustment button, the gas valve can be used 64 via an electrical line 71 with a control device (not shown) related to the gas flow in regulates the combustion chamber 2. As a control variable for the gas flow, can for example the comparison result between the temperature the room in which the heating furnace according to the invention is located, and the preset target temperature of the room is used become.

The one made of metal or sheet metal is preferably used Combustion chamber, like the combustion chamber in Fig. 6, completely as a module prefabricated to a quick construction of the invention To allow the heater. Preferably has a prefabricated Combustion chamber module or combustion chamber insert already in Fig. 6 shown gas and electrical installation, where the storage body are already prefabricated so that the Gas line 63 and possibly the electrical line 71 directly are accessible for their connection. Are preferably on the Module already attached to the heat sink.

It is understood that the one shown in Figure 6 Combustion chamber for firing with natural gas in analogously for firing with liquid gas or heating oil can be redesigned. When heating with LPG preferably between the gas supply line and the Distribution chamber a gas expansion chamber (not shown) provided to the specific heating gas used an appropriate pressure to relax. Will be a suitable one Pressure reducer used, so the gas expansion chamber also dropped.

The exhaust duct shown in Figure 7 for use with an exhaust pipe 8 has a heating furnace according to the invention hollow, roughly hemispherical towards the combustion chamber Shielding plate 90 and a chimney pipe 91 that the at Combustion exhaust gases, for example, in a fireplace dissipates. The exhaust system shown in Figure 7 can for example, directly above the stove, in the room in where the stove is located, or outside the house be mounted. The burned heating gas rises in the exhaust pipe 8 on, flows against the shielding plate 90, flows around this and finally gets into the chimney pipe 91, as by the arrows 92 indicated. At the exhaust gas duct shown particularly advantageous that the shielding plate 90 Combustion chamber of the heating furnace according to the invention from the outside shields incoming air and thus prevents that in the Burning heater or pilot flame is blown out.

Another measure to increase the security of the The heating furnace according to the invention can consist in preventing that the manually openable viewing window 29 is opened without thinking becomes. Otherwise unburned heating gas could possibly enter the Space or burns could occur, such as especially in children. For this purpose, the viewing window 29 or the frame supporting the viewing window with the heater be screwed. There is also a safety pawl or the like conceivable that a rash opening of Viewing window prevented. Alternatively, the latch can be opened the viewing window with a lock or the like be provided so that the viewing window with only one (suitable) key or a special tool is.

Claims (26)

1. Heating oven (1) with an air-tight combustion chamber (2) having a fresh air inlet and an exhaust gas outlet (8), the heating oven comprising at least one first heat storage element (3, 4; 27) heated by the combustion chamber (2) and at least for the most part spaced apart from the combustion chamber (2), such that an air channel (16, 17; 28) is defined by the spacing, characterised in that the heating oven comprises a gas and/or oil firing system and the hot air generated by the combustion chamber (2) in the air channel (16, 17; 28) remains substantially in the heating oven (1).
2. Heating oven according to claim 1, characterised in that the combustion chamber is enclosed by a sheet metal mantle.
3. Heating oven according to claim 1 or 2, characterised in that the side of the first heat storage elements (3, 4; 27) opposite to the combustion chamber (2) is in thermal contact with a second heat storage element (12, 14; 25).
4. Heating oven according to claim 3, characterised in that at least one second flow channel (15, 18; 26) is provided between the outer wall of the first heat storage element (3, 4; 27) and the inner wall of the second heat storage element (12, 14; 25).
5. Heating oven according to any one of the claims 1 to 4, further comprising a combustion controller adapted to open a valve for adjusting the amount of gas and/or oil supplied to the combustion chamber (2) when the temperature falls below a first predetermined value to thereby initiate combustion in the chamber, and adapted to close when a second temperature is reached, thereby shutting down combustion in the chamber.
6. Heating oven according to any one of the claims 1 to 5, characterised in that means (19) are provided within the combustion chamber (2) at the end toward the exhaust gas outlet (8) for single or multiple deflection of the combustion gases.
7. Heating oven according to any one the claims 1 to 6, characterised in that means for single or multiple deflection of the exhaust gas are provided subsequent to the exhaust gas outlet (8).
8. Heating oven according to claim 1, characterised in that a wall (5, 6; 24) of the combustion chamber (2) or a surface of the heat storage element (3, 4; 27) facing the combustion chamber forms one wall of the first flow channel (16, 17; 28).
9. Heating oven according to any one of the claims 1, 4 and 8, characterised in that the first and/or second flow channel (16, 17; 15, 18; 28, 26) is at least partially provided with one or more heat conduction elements (33, 31).
10. Heating oven according to claim 9, characterised in that the heat conduction element (33, 31) partially or completely comprises the corrugated structure.
11. Heating oven according to claim 9 or 10, characterised in that air flows from below to above across the heat conduction element (33, 31).
12. Heating oven according to claim 10, characterised in that the corrugated structure is arranged in the heating oven such that a plurality of flow channels are formed in vertical disposition.
13. Heating oven according to claim 10 or 12, characterised in that the corrugated structure is attached to the combustion chamber (2).
14. Heating oven according to any one of the claims 9 to 11, characterised in that the heat conduction element is at least partially black.
15. Heating oven according to any one of the claims 9 to 11, characterised in that the heat conduction element (33, 31) is arranged at a spacing with respect to the first heat storage element (3, 4; 27).
16. Heating oven according to any one of the claims 9 to 11, 14 or 15, characterised in that the heat conduction element comprises a substantially flat plate (51) on its side facing the first heat storage element and/or the combustion chamber.
17. Heating oven according to any one of the claims 1 to 16, characterised in that the combustion chamber (2) and/or the means (19) for combustion gas deflection and/or the heat conduction element (33, 31) and/or the plate (51) are composed of metal and/or refractory brick.
18. Heating oven according to claim 9, characterised in that a second heat conduction element is attached to the inner wall of the second heat storage element.
19. Heating oven according to any one the claims 1 to 18, characterised in that the first heat storage element (3, 4; 27) and/or the second heat storage element (12, 14; 25) is arranged substantially parallel to the wall of the combustion chamber (2) and/or substantially has the dimensions of the corresponding wall of the combustion chamber.
20. Heating oven according to any one of the preceding claims, characterised in that the first and/or second heat storage element is pieced together from several elements.
21. Heating oven according to any one of the preceding claims, characterised in that the first and/or second heat storage element has substantially the form of a flat plate.
22. Heating oven according to any one of the preceding claims, characterised in that the first heat storage element (3, 4; 27) is rounded at its upper and/or lower end.
23. Heating oven according to any one of the preceeding claims, characterised in that the first heat storage element (3, 4; 27) and/or the second heat storage element (12, 14; 25) at least partially comprises a thickness of about 30 mm to 120 mm.
24. Heating oven according to any one of the preceding claims, characterised in that the first heat storage element (3, 4; 27) is thicker than the second heat storage element (12, 14; 25), in particular is twice as thick.
25. Heating oven according to any one of the preceding claims, characterised in that the heating oven comprises one or more temperature sensors, such as temperature dependent resistors, in its interior and/or externally, which are connected to the combustion controller via heat resistant electrical wires.
26. Heating oven according to any one of the preceding claims, characterised in that the heating oven is provided with electronic simulation means, which simulate the cracking and popping sound of burning wood, preferably comprising a semiconductor memory for storing a sound sequence, an amplifier and a loud speaker.

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