JP2002267163A - Oven - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an oven 100, maintaining high thermal efficiency and thermal output by heating directly while reducing the contamination of indoor air and provided with a beautiful appearance as well as the easiness of cleaning, which are same as a flat top oven, when the oven is not used. SOLUTION: The oven 100 is provided with a top plate 1, heating ports 2 provided on the top plate 1 and burners 3, burning fuel gas G to form flame 10 at the lower part of the heating ports 2 to heat a matter N to be heated. The burners 3 are provided at the lower part of the heating ports 2 so as to be apart from the heating ports 2 while an exhausting means 12, for discharging the waste gas of combustion of the burning section 11 formed between the heating ports and the burners 3, is provided.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a stove for domestic or business use mainly used for cooking.

[0002]

2. Description of the Related Art A conventional cooking stove that directly heats a pot (an example of an object to be heated) with a flame formed by an exposure type burner is provided with a gotoku on which a pot is placed and a gotoku. Thus, the pot is lifted from the top plate and supported by the dimensions necessary for discharging the combustion exhaust gas and flowing the secondary combustion air. Such direct heating with a stove has the advantages of relatively good thermal efficiency (about 45% to 60%) and excellent responsiveness to heating, and that Gotoku can stably support the pot. There were advantages.

[0003]

However, in such a stove in which the fuel is burned to perform direct fire heating, the combustion exhaust gas is discharged into the room from the side of the pot, so that the combustion emissions (carbon dioxide, Indoor air pollution by carbon monoxide, nitrogen oxides, and other minor harmful substances such as aldehydes may be a problem. Furthermore, the burners and gotoku exposed from the top plate impair the aesthetic appearance and are not problematic in terms of ease of cleaning.

[0004] Therefore, as a stove with little indoor air pollution due to combustion exhaust gas and excellent in aesthetics and ease of cleaning, a flat top stove whose top plate is made of a flat material is partially sold. As a conventional flat top stove, when a heat source is a fuel gas, a ceramic burner that heats an object to be heated by red-heating a ceramic combustion surface member provided below a heat-resistant glass top plate is used. In the case where the heat source is electric, there are a type using induction heating (IH) and a type using a resistance wire or a halogen lamp.

However, the flat top stove using a fuel gas as a heat source as described above has a small combustion load per unit area of the ceramic burner and a low thermal efficiency of heat transfer by conduction and radiation from a combustion surface member. It has been difficult to ensure a sufficient heat output required as a stove for heating an object to be heated such as a pot. In addition, in the flat top stove using electricity as a heat source, there is a problem that equipment using induction heating has a high equipment cost, and that using a resistance wire or a halogen lamp has a low heat output.
Therefore, the present invention has been made to solve these problems, and performs direct fire heating while suppressing indoor air pollution to maintain a high thermal efficiency and heat output while maintaining a flat top when not in use. An object of the present invention is to provide a stove having the same aesthetic appearance and ease of cleaning as a stove.

[0006]

According to a first aspect of the present invention, a stove according to the present invention includes a top plate, a heating port provided in the top plate, a fuel gas, and a fuel gas. A burner that forms a flame below the mouth to heat the object to be heated, the burner is provided separately below the heating port, and is formed between the object to be heated and the burner. An exhaust means for discharging the combustion exhaust gas from the combustion section to the outside is provided.

[Effects] In heat cooking, thermal responsiveness is important. It goes without saying that a quick rise in temperature is necessary for efficient cooking. However, when the flame is reduced, the amount of heating does not follow quickly and does not decrease. Thermal efficiency is also an important factor in economics. In view of the above, direct heating by flame is most suitable for cooking. Therefore, the stove of the present invention, as in the present configuration, forms a flame below a heating port opened in a top plate, and performs direct flame heating in which an object to be heated mounted above the heating port is heated by the flame. The heat output can be set high,
Excellent thermal responsiveness and thermal efficiency.

Further, in burning the fuel gas as described above, it is important to take in the combustion air in the burner and discharge the combustion exhaust gas. In particular, when performing Bunsen combustion in a burner, it is necessary to take into consideration the intake of combustion air and the emission of combustion exhaust gas because the secondary combustion air is taken in a draft accompanying the smooth emission of combustion exhaust gas. The traditional virtue provided on the hob fulfills this function by supporting the pot fictitiously, and it is absolutely necessary for good combustion.However, the virtue of the present invention By omitting it, it is possible to realize a flat shape without unevenness on the top plate for cleaning and aesthetics.

That is, the stove of the present invention has
Exhaust means is provided, and the exhaust means removes the combustion exhaust gas from the combustion section between the burner provided separately below the heating port and the heating port or the heated object mounted above the heating port. It can be discharged to the outside such as the hood of a ventilation facility provided at the rear or above the stove or the outside,
With the emission of the combustion exhaust gas, the intake of the combustion air into the burner can be performed well. Therefore,
The stove of the present invention reduces indoor air pollution by discharging combustion exhaust gas to the outside at a high trapping rate, while maintaining high heat efficiency and heat output by direct fire heating, and when not in use, for example, when the top plate is not used. By closing the heating port with a lid member or the like, the flatness of the top plate is improved, and a stove having the same aesthetic appearance and easy cleaning as a flat top stove can be realized.

[Structure 2] In the stove according to the present invention, as described in claim 2, in addition to the structure of the stove according to the above structure 1, the heating port is closed by mounting the object to be heated on the upper part. It is formed so that.

[Effects] As in the present configuration, the heating port is made to function as a window for mounting the object to be heated, and the opening width and the outer shape of the heating port are set to be smaller than the bottom of the object to be heated such as a general pot. Designed to be small, the heating port is formed so as to be closed by the bottom surface of the object to be heated, and when the object to be heated is mounted on the heating port and the heating port is closed, the heating port from the heating port to the room is closed. The outflow of the flue gas is sealed, and most of the flue gas can be discharged to the outside by the exhaust means except for a small leak. Therefore, in the stove having the same aesthetic appearance and ease of cleaning as the flat top stove, the combustion exhaust gas can be discharged to the outside at a particularly high collection rate.

The exhaust means described so far can be constituted by, for example, an exhaust passage communicating the combustion section with the outside. In this exhaust passage, the outside side is higher than the combustion section side. By utilizing the buoyancy of the high-temperature flue gas, the flue gas can be discharged to the outside.

[Structure 3] According to a third aspect of the present invention, in the stove according to the third aspect, in addition to the structure of the stove according to the first or second aspect, the exhaust means may further include an exhaust port for communicating the combustion section with the outside. And a suction device that is provided in the exhaust passage and sucks the combustion exhaust gas of the combustion section to the outside.

[Function and Effect] As in the present configuration, by forming the exhaust means by the communication path and the suction device, the outside of the exhaust flow path is substantially horizontal or below the combustion section side, and Even when buoyancy cannot be used, the combustion exhaust gas can be discharged to the outside. Also,
If the combustion section is set at a negative pressure, leakage of the combustion exhaust gas from around the object to be heated into the room can be suppressed. Further, a heat exchanger for exchanging heat between the combustion exhaust gas and the combustion air is provided in the communication passage, and even when the pressure loss in the communication passage is high, the combustion exhaust gas in the combustion section is forcibly removed at a high collection rate. Can be discharged to the outside.

[Structure 4] A stove according to the present invention is characterized in that, in addition to the structure of the stove according to any one of the constitutions 1 to 3, in addition to the oxygen-containing gas for combustion supplied to the burner, A heat exchange means for exchanging heat with the combustion exhaust gas discharged to the outside by the exhaust means.

[Effects] By providing the heat exchange means as in this configuration, the heat of the relatively high temperature combustion exhaust gas discharged to the outside by the exhaust means can be reduced by the combustion air (an example of an oxygen-containing gas for combustion). ), And in the stove of the present invention, the thermal efficiency can be improved.

[Structure 5] A stove according to the present invention, as described in claim 5, is a heating stove capable of changing the opening width of the heating stove in addition to the structure of the stove according to any one of the above structures 1 to 4. An opening width changing means is provided.

[Effects] By providing the heating port opening width changing means as in this configuration, the opening width of the heating port can be changed according to the width such as the outer diameter of the object to be heated. By changing the opening width of the heating port according to the external shape of the object, the object to be heated can be stably mounted on the heating port with the appropriate opening width. Also, it is possible to suppress the leakage of the combustion exhaust gas from the heating port into the room.

[Structure 6] According to a sixth aspect of the present invention, in the stove according to the present invention, in addition to the configuration of the stove according to any one of the first to fifth aspects, the stove has a width equal to or less than the opening width of the heating port. A heating member is provided at the heating port to support the object to be heated.

[Function and Effect] In the stove of the present invention, as in the present configuration, an annular plate, a wire mesh or lattice member, which is smaller than the width of the object to be heated and larger than the opening width of the heating port, or a general pentagonal member. By providing a member or a wire having an opening at the heating port as a supporting member, even when the width of the object to be heated is smaller than the opening width of the heating port, the supporting member moves the object to be heated below the heating port. It can be supported without dropping.

[Structure 7] A stove according to the present invention, as described in claim 6, includes a lid member capable of closing the heating port, in addition to the structure of the stove according to any one of the above structures 1 to 6, An interlock means for stopping the operation of the burner when the heating port is closed by the lid member is provided.

[Function and Effect] In the stove of the present invention, when the fuel gas is not burned in the burner, the heating port is closed by the lid member to improve the aesthetic appearance and prevent the object from falling into the heating port. Can be prevented. Therefore, in the stove of the present invention using the lid member, it is preferable to provide an interlock means as in the present configuration, and such an interlock means is provided when the heating port is closed by the lid member. In this case, the burner operation is stopped, and the burner operates only when the heating port is open, so that when the heating port is closed by the lid member, the burner operation is started incorrectly. Operation can be prevented.

[0023]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS [First Embodiment] A first embodiment of a stove according to the present invention will be described with reference to the drawings. FIG. 1 is a schematic diagram of a built-in stove 100 configured as a stove according to the present invention.
“0” is provided in the installation section 102 opened to the counter 101 of the system kitchen.

As shown in FIG. 2, the stove 100 includes a top plate 1 made of heat-resistant glass, a heating port 2 provided on the top plate 1, and a heating object such as a pot mounted on an upper portion thereof. A burner 3 that burns a fuel gas G such as a gas and forms a flame 10 below the heating port 2 to heat the object to be heated N is provided. However, the heating port 2 is formed such that the object to be heated N is mounted on the upper part and closed.

The top plate 1 has a flat upper surface, and the upper surface is configured to be substantially flush with the upper surface of the counter 101. The inner diameter (opening width) of the heating port 2 is slightly smaller than the outer diameter (width) of a general pot or the like.
For example, the inner diameter of the heating port 2 is φ
It is about 150 to 200 mm. In addition, heating port 2
Can be closed with a lid or the like when not in use.

The burner 3 is a Bunsen combustion type burner. The burner 3 blows out a mixture of the fuel G and the air supplied to the mixing pipe 5 by blowing out the fuel gas G from the gas nozzle 6 from a plurality of flame ports 3a. A primary flame is formed by burning, and a secondary flame is formed by taking in secondary combustion air supplied from below the inside of an annular casing member 3b, which will be described later, to form a flame 10 below the heating port 2. Is configured.

Further, the burner 3 is provided separately below the heating port 2 and has an annular casing member 3b into which a mixture of fuel gas G and air is supplied, and an annular inner surface of the annular casing member 3b. It has a plurality of flame openings 3a which are formed and inject a mixture of fuel gas G and air in an annular inward direction to burn the mixture. In such a burner 3, a mixture of the fuel gas G and the air supplied from the mixing pipe 5 into the annular casing member 3b is ejected from the flame opening 3a in an annular inward substantially horizontal direction, and is ejected. The primary flame in which the air-fuel mixture of the fuel gas G and the air is burned changes its direction to the upper heating port 2 side by buoyancy, and a secondary flame is formed toward the heating port 2 side. The bottom surface of the object to be heated N in the heating port 2 can be satisfactorily heated. Furthermore, the flame outlet 3a of the burner 3 is
Of the object to be heated N, that is, about 10 to 50 mm below the bottom surface of the object to be heated N. The casing member 13 covers the space between the burner 3 and the heating port 2 below the top plate 1. The burned combustion part 11 is formed.

The casing member 13 is provided on the top plate 1.
The lower part extends to the rear of the stove 100, and is connected to an exhaust pipe 14 provided along the wall behind the stove 100. The exhaust pipe 14 has an exhaust port 15 that opens upward.

Therefore, the combustion part 11 is provided with the casing member 1.
3 and the exhaust flow path 12 formed in the exhaust pipe 14 communicates with the exhaust port 15 side (an example of the outside), and the exhaust port 15 side of the exhaust flow path 12 burns. Being higher than the part 11 side, in the combustion part 11, the combustion exhaust gas discharged from the burner 3 and heated to a certain degree after heating the object to be heated N is discharged from the exhaust port 15 to the stove 100 by using buoyancy. It can be discharged to the rear side. In addition, most of the combustion exhaust gas discharged from the exhaust port 15 as described above is discharged outside by a ventilation device or the like provided above the stove 100. Like the exhaust passage 12 having such an exhaust port 15 above the combustion section 11,
Means for discharging the combustion exhaust gas of the combustion unit 11 to the outside is referred to as exhaust means.

Further, as shown in FIG.
Is extended to the hood 50 of the ventilation device 51 provided above the stove 100, and the exhaust port 15 is connected to the hood 50.
It may be configured to open to (an example of the outside). With this configuration, the combustion exhaust gas from the combustion section 11 can be discharged from the exhaust port 15 to the hood section 50 using buoyancy, and the combustion exhaust gas discharged to the hood section 50 can be discharged outdoors by the ventilation device 51. Therefore, indoor air pollution due to the combustion exhaust gas is almost eliminated. Further, the fan operation of the ventilation device 51 and the operation of the stove 100 may be linked.

In the case where the stove 100 has a plurality of heating ports 2, the casing member 13 and the exhaust pipe 14 may be provided separately for each combustion section 11 formed below each heating port 2. May be provided. In general, the stove 100 is provided with a grill, but the exhaust of the grill may be joined to the exhaust pipe 14.

The stove 100 includes the casing member 1
Since the exhaust passage 12 in the extension portion 3 is in contact with the lower surface of the top 1, the temperature of the top 1 at that portion is slightly increased. Therefore, on the upper surface of the top plate 1 at the portion heated by the combustion exhaust gas, cooking, heat keeping, and the like can be performed by utilizing the waste heat of the combustion exhaust gas. Further, since the temperature of the exhaust passage 12 becomes high, it is desirable that the casing member 13 be shielded from heat by a heat insulating material in order to avoid a thermal influence on combustible materials and electrical components that are weak to heat. If it is inconvenient for the top plate 1 to become hot to prevent burns or to prevent ignition due to contact with a combustible such as a towel, the exhaust passage 12 and the top plate 1
It is also possible to insulate the lower surface.

Such a stove 100 can effectively use only the bottom surface of the object to be heated N as a heat transfer area, but the heat transfer ratio at the side portion of a pot or the like is about 10% of the entire thermal efficiency.
Since this is an example of the measurement result, there is not much problem. Unlike a completely closed gas stove, direct heating can be performed, so that much higher efficiency can be maintained than a closed gas stove.

[Second Embodiment] A second embodiment of the stove according to the present invention will be described with reference to the drawings. Although a description of the same configuration as that of the above-described embodiment is omitted, the stove 100 shown in FIG. 4 is driven by a motor 21 in an exhaust passage 12 that communicates the outdoors (an example of the outside) with the combustion unit 11. A sirocco fan 20 for sucking the combustion exhaust gas from the combustion section 11 to the outside is provided.
The exhaust means for discharging the first combustion exhaust gas to the outside is constituted by the exhaust passage 12 and the sirocco fan 20.

At this time, in order to lower the temperature at which the flue gas enters the sirocco fan 20, air other than the flue gas is simultaneously sucked by the sirocco fan 20 to dilute the flue gas with air. Is also possible. The operation of the sirocco fan 20 is performed in conjunction with the operation of the stove, and the suction amount can be varied in conjunction with the number of burners in operation and the amount of combustion in the burners.

[Third Embodiment] A third embodiment of a stove according to the present invention will be described with reference to the drawings. A description of the same configuration as that of the above-described embodiment will be omitted, but the stove 100 shown in FIG. 5 includes the same exhaust means as that of the above-described second embodiment, and also includes a combustion device supplied to the burner 3. A heat exchange unit is provided for exchanging heat between air (an example of an oxygen-containing gas for combustion) and flue gas discharged outdoors by an exhaust unit. The waste heat of the flue gas is recovered by the combustion air to generate heat. It is possible to improve the reciprocity.

That is, the secondary combustion air supplied to the burner 3 is supplied from outside to the casing member 22 provided below the annular casing member 3b of the burner 3 via the air flow path 26. The secondary combustion air is supplied to the burner 3 from inside the casing member 22 and inside the annular casing member 3b.

The stove 100 is provided with a heat exchanger 30 for exchanging heat between the combustion air flowing through the air passage 26 and the combustion exhaust gas flowing through the exhaust passage 12 on the upstream side of the sirocco fan 20. Provided, the heat exchanger 30
Work as the heat exchange means.

As such a heat exchanger 30, any of a regenerator type and a recuperator type can be used, but in this embodiment, a plate type recuperator is used. If the casing member 22 is formed so as to extend to the gas nozzle 6, the air preheated by the heat exchanger 30 can also be used as primary combustion air. It should be noted that if the primary combustion air is preheated, the combustion speed changes, so that it is necessary to change the shape of the burner 3 and the like. In addition, in the stove 100 having the plurality of heating ports 2, when the cool exhaust air sucked from the unburned heating port 2 side is mixed with the combustion exhaust gas of the exhaust passage 12, the heat exchange rate of the heat exchanger 30 is reduced. Therefore, it is preferable to provide a function to cover the non-burning heating port 2 or to close the exhaust passage on the non-burning heating port 2 side with a damper or the like.

The stove 10 provided with the heat exchange means as described above
A value of 0 can generally exhibit the efficiency (45-60%) or more of the conventional direct-fired gas stove.

Another Embodiment Next, another embodiment of the stove according to the present invention will be described with reference to the drawings. <1> The stove 100 according to the present invention is configured such that the opening diameter of the heating port 2 is adjusted to the outer diameter of the heating object N so that the stove 100 can be used even when the diameter of the heating object N is smaller than the opening diameter of the heating port 2. And a heating port width changing means that can be changed in accordance with the above.

First, as a first example, the stove 100 shown in FIG. 6 has an annular member 27 fitted into the heating port 2 and having an opening 27a smaller in diameter than the heating port 2 as a heating port width changing means. The object to be heated N is supported by the annular member 27. The annular member 27 can be appropriately selected according to the diameter of the object to be heated N.

Next, as a second example, a stove 100 shown in FIG. 7 is provided in the top plate 1 on the outer periphery of the heating port 2 and includes a diaphragm structure constituted by a plurality of diaphragm blades 28. Provided as width changing means. That is, this diaphragm blade 2
8, as shown in FIG. 8A, one end 28 b is fixed to the top plate 1 below the diaphragm blade 28, and the other end 28 b
a is configured to slide in a groove formed in a rotating ring 29 provided above the diaphragm blade 28. Then, by rotating the rotating ring 29, FIG.
As shown in (5), the attitude of the aperture blade 28 is changed, and the inner diameter of the heating port 2 can be changed. The heating port width changing means having such a throttle structure can arbitrarily change the opening diameter of the heating port 2 while maintaining the airtightness between the heating port 2 and the object to be heated N to some extent.

<2> The stove 100 of the present invention has a width smaller than the opening width of the heating port 2 so that it can be used even when the diameter of the object N to be heated is smaller than the opening diameter of the heating port 2. A support member 31 for supporting the heating object N at the heating port 2 can be provided, and its configuration will be described below.

First, as a first example, a stove 100 shown in FIG. 9 is a support member 31 which is mounted on a top plate 1 and has a radial lattice projecting from the outside of the heating port 2 to the inside. Even if the object to be heated N having a smaller diameter than the heating port 2 is mounted, the object to be heated N can be supported by the support member 31.

Next, as a second example, the stove shown in FIG. 10 is mounted on the annular casing member 3b of the burner 3, and
A support member 31 having a radial grid projecting from the outside of the heating port 2 to the inside below the top plate 1, and this supporting member 31 can also support the object to be heated N having a smaller diameter than the heating port 2. Further, since such a support member 31 does not protrude above the heating port 2, it does not hinder the flattening of the top plate 1.

Further, even if the object to be heated N such as a small-diameter pan is supported by the heating port 2 by the support members 31, a small amount of combustion exhaust gas is generated when such a small-diameter pan is directly heated. Therefore, it can be said that the influence of indoor air pollution is small. Furthermore, if the combustion unit 11 is maintained at a negative pressure by a suction device or the like, leakage of the combustion exhaust gas from around the object to be heated N can be suppressed.
Further, by using such a support member 31, a net-like support member, or the like, cooking without using a pan, such as grilling and skewers, can be performed. Such a support member does not need to be formed in a radial grid, but may be formed in a rectangular grid to have a shape that can be installed in the heating port 2 of the top plate 1.

<3> The stove 100 of the present invention has the structure shown in FIG.
As shown in (2), when the heating port 2 is provided with the lid member 32 which can be closed, when the heating port 2 is closed by the lid member 32, an interlock means for stopping the operation of the burner 3 may be provided. it can. That is, the stove 100
A projection part 33 provided at a lower part of the lid member 32 as an interlock means, a lever part 34 which is swung by the projection part 33 when the lid member 32 is fitted into the heating port 2,
When the contact between the pair of electrodes 35a and 35b is released by the swing of the lever 34 and the contact between the two electrodes 35a and 35b is released, the shut-off valve 4 is operated to supply the fuel gas to the gas nozzle 6. A control device 36 for shutting off the supply. Further, the control device 36 can be configured to operate the shutoff valve 4 electrically or mechanically.

<4> In the above embodiment, the shape of the heating port 2 is circular. However, the shape of the heating port may be a star or other polygon having good pot stability.

[Brief description of the drawings]

FIG. 1 is a schematic view showing a stove of the present invention installed.

FIG. 2 is a partial side sectional view of the stove according to the first embodiment.

3 is a partial sectional side view showing another embodiment of the exhaust tube of the stove shown in FIG. 2;

FIG. 4 is a partial side sectional view of a stove according to a second embodiment.

FIG. 5 is a partial side sectional view of a stove according to a third embodiment.

FIG. 6 is a partial side sectional view of a stove provided with a heating port width changing unit as another embodiment of the present invention.

FIG. 7 is a partial side sectional view of a stove provided with a heating port width changing unit as another embodiment of the present invention.

FIG. 8 is a plan view showing the state of the heating port width changing means of the stove shown in FIG. 6;

FIG. 9 is a partial side sectional view of a stove provided with a support member according to another embodiment of the present invention.

FIG. 10 is a partial side sectional view of a stove provided with a support member according to another embodiment of the present invention.

FIG. 11 is a partial sectional side view of a stove provided with an interlock means as another embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Top plate 2 Heating port 3 Burner 3a Flame port 3b Annular casing member 10 Flame 11 Burning part 12 Exhaust flow path (Exhaust means) 20 Sirocco fan (Exhaust means) 30 Heat exchanger (Heat exchange means) 27 Annular member (Heat port Width changing means) 28 aperture blade (heating port width changing means) 31 support member 32 lid member G fuel gas N heated object

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI theme coat ゛ (Reference) F24C 15/20 F24C 15/20 FG (72) Inventor Masahiko Matsumura 4-chome Hiranocho, Chuo-ku, Osaka-shi, Osaka 1-2 1-2 Osaka Gas Co., Ltd. (72) Koichi Nishimura 4-1-2 Hiranocho, Chuo-ku, Osaka-shi, Osaka 4-Chome 1-2 F-term in Osaka Gas Co., Ltd. (Reference) 3K023 QA18 QC08

Claims (7)

[Claims] 1. A top plate, a heating port provided in the top plate, and a burner for burning a fuel gas to form a flame below the heating port to heat an object to be heated; And a stove provided below and spaced apart from the heating port, and configured to discharge exhaust gas from a combustion section formed between the object to be heated and the burner to the outside. 2. The stove according to claim 1, wherein the heating port is formed such that the object to be heated is mounted on an upper portion and closed. 3. The exhaust means comprises: an exhaust passage communicating the combustion section with the outside; and a suction device provided in the exhaust passage for sucking the combustion exhaust gas from the combustion section to the outside. The stove according to claim 1, wherein the stove is formed. 4. A heat exchange means for exchanging heat between the oxygen-containing gas for combustion supplied to the burner and the combustion exhaust gas discharged to the outside by the exhaust means. Or the stove according to item 1. 5. The stove according to claim 1, further comprising a heating port opening width changing means capable of changing an opening width of the heating port. 6. The stove according to claim 1, further comprising a support member that supports the object to be heated having a width equal to or less than an opening width of the heating port at the heating port. 7. The apparatus according to claim 1, further comprising: a lid member capable of closing the heating port; and interlock means for stopping operation of the burner when the heating port is closed by the lid member. 7. The stove according to any one of items 6 to 6.