WO2003060382A1

WO2003060382A1 - Gas stove

Info

Publication number: WO2003060382A1
Application number: PCT/JP2003/000271
Authority: WO
Inventors: Tsutomu Sobue; Koji Yano; Yutaka Yamada
Original assignee: Rinnai Kabushiki Kaisha
Priority date: 2002-01-16
Filing date: 2003-01-15
Publication date: 2003-07-24
Also published as: DE60326818D1; EP1467153A1; EP1467153B1; CN1592830A; JP2003207135A; EP1467153A4; CN1261718C; KR20030062220A; JP3652652B2; KR100519525B1

Abstract

A gas stove in which heat emitted from a side face of a combustion chamber of the stove is suppressed from being transmitted to the inside of the stove. A gas stove (1) comprises a burner (2), a porous body (3), an air-supply and -exhaust fan (6), an external periphery wall (9), an air exhaust passage (26) connecting the porous body (3) and an air exhaust opening (5), and an air supply passage (20). There is formed heat insulation space (12) sealed by the external peripheral wall (9) and a side face (11) of a combustion chamber (10) with the exception of a supply opening (13) and an exhaust opening (14) that are for air. The air supply passage (20) and the supply opening (13) are connected by an air supply branch tube (15). When the burner (2) burns, cooling air is supplied to the heat insulation space (12) through the air supply branch tube (15). The cooling air suppresses heat, emitted from the side surface (11) of the combustion chamber (10), from being transmitted to the inside of the gas stove (1), and air exhausted from the exhaust opening (14) cools exterior portions of the combustion chamber (10) of a glass top (4).

Description

Description Gas stove Technical field

The present invention relates to a gas stove in which an object to be heated is placed on an upper surface of a combustion chamber and a flame is not exposed during heating. Background art

Conventionally, as shown in Fig. 5 (a), the upper surface of a combustion chamber provided with a panner 100 is made of a heat-resistant glass top plate 101, and cooking placed on the glass top plate 101 Gas stoves for heating objects are known. In such a gas stove, the combustion air is supplied to the burner 100 by the supply / exhaust fan 102, and the combustion exhaust gas from the burner 100 is discharged from the exhaust port 103. .

FIG. 5 (b) is a cross-sectional view of the gas stove shown in FIG. 5 (a) as viewed from the side. The controller 130 adjusts the combustion amount of the burner 100 The flow rate of the combustion gas supplied from the gas supply path 121 to the mixing pipe 123 via the nozzle 122 is compared with the target combustion amount of the panner 100 set by the adjustment switch 104. In addition to being controlled by the proportional valve 124, the flow rate of the combustion air supplied to the mixing pipe 123 via the air supply passage 120 is controlled by the supply and exhaust fan 102.

Further, a gas supply valve 125 is provided in the gas supply path 122. An air-permeable porous body 105 is provided outside the burner 100, and the porous body 105 is an exhaust gas that guides the combustion exhaust gas of the parner 10 to the exhaust port 103. It is in communication with Road 1 26. In this way, the exhaust gas By providing the porous body 105 in the passage, in addition to the hot air 111 from the combustion surface of the burner 100 that generates the combustion flame 110, the porous body heated by the passage of the high-temperature combustion exhaust gas Radiant heat 1 12 is also generated from the substance 105. Therefore, the heat efficiency of the gas stove can be improved.

When the gas stove configured as described above is used, the inside of the combustion chamber 140 becomes extremely hot (approximately 100 ° C.) due to heat radiation from the burner 100 and the porous body 105. C), and heat is also dissipated inside the stove through the side surface of the combustion chamber 140. As a result, the temperature inside the gas stove also becomes high, and the electrical components (electric boards, fan motors, solenoid valves, etc.) provided inside the gas stove may be damaged by overheating. Disclosure of the invention

In view of the above background, the present invention has been made to provide a gas stove that prevents internal electric components from being overheated by radiating heat from a side surface of a combustion chamber. A surface-burning burner and a gas-permeable porous body provided in the combustion chamber in which the object to be heated is placed on the top plate, facing the top plate; and a fuel for supplying a fuel gas to the panner A gas supply means, an exhaust passage having one end communicating with the combustion chamber via the porous body and the other end communicating with an exhaust port, and supplying combustion air to the parner via an air supply passage. A supply / exhaust fan for sending the combustion exhaust gas to the exhaust port via the porous body and the exhaust passage, wherein the porous body heated by the heat release from the burner and the combustion exhaust gas from the burner is provided. Heat through the top plate An improvement of the gas stove heating the heat thereof.

In a first aspect of the present invention, an outer peripheral wall is provided around the side surface of the combustion chamber at an interval from the side surface, and a space is formed by the side surface and the outer peripheral wall. Characterized by having an air supply branch pipe for communicating You.

In the present invention, when burning the burner, fuel gas is supplied by the fuel gas supply means and combustion air is supplied by the supply / exhaust fan. Then, the heat inside the combustion chamber becomes high due to the heat radiation from the parner and the heat radiation from the porous body heated by the high-temperature combustion exhaust gas of the parner, and the heat is also released from the side surface of the combustion chamber. You.

However, during operation of the air supply / exhaust fan, air is also supplied from the air supply passage to the space formed by the side surface of the combustion chamber and the outer peripheral wall through the air supply branch pipe. Therefore, the heat released from the side surface of the combustion chamber due to the air supplied into the space is suppressed from propagating into the gas stove, and the inside of the gas stove becomes high temperature to operate the supply / exhaust fan. It is possible to prevent electrical components such as motors and the like from being damaged due to overheating. According to the first aspect, it is not necessary to provide a fan for supplying air into the space separately from the supply / exhaust fan, so that the cost of the gas stove can be suppressed.

In the first aspect, the space is sealed and formed except for an air supply port and a discharge port, and the air supply branch pipe is connected to the supply port. An exhaust gas recirculation pipe is provided, which communicates with a fan and recirculates air exhausted from the exhaust port to the air supply / exhaust fan.

According to the present invention, the air supplied from the air supply branch pipe into the space via the supply port is heated by heat released from the side surface of the combustion chamber. Then, the air thus heated is sucked into the air supply / exhaust fan from the exhaust outlet of the space through the exhaust gas recirculation pipe, and is supplied to the parner through the air supply passage. As a result, the The temperature of the supplied combustion air is raised to increase the temperature of the combustion flame of the parner, and the burning speed of the parner is also increased, so that the surface temperature of the parner can be raised. Further, since the temperature of the combustion exhaust of the parner also increases, the radiation conversion efficiency of the porous body through which the combustion exhaust passes can be improved.

In a second aspect of the present invention, an outer peripheral wall is provided around the side surface of the combustion chamber at an interval from the side surface, and the side wall and the outer peripheral wall are sealed except for an air supply port and an exhaust port. And an exhaust gas recirculation pipe that communicates the exhaust port with the air supply / exhaust fan to return the air exhausted from the exhaust port to the air supply / exhaust fan.

According to the present invention, the indoor air supplied from the supply port of the space is heated by heat released from the side surface of the combustion chamber when passing through the space, and the exhaust gas recirculation pipe The air is sucked into the air supply / exhaust fan through the fan. Therefore, similarly to the first aspect, the temperature of the air supplied to the parner by the air supply / exhaust fan is increased by the air heated in the space, and the surface temperature of the parner during combustion is reduced. And the radiation conversion efficiency of the porous body can be improved.

In a third aspect of the present invention, an outer peripheral wall is provided around the side surface of the combustion chamber at a distance from the side surface, and the outer peripheral wall is sealed by the side surface and the outer peripheral wall except for an air supply port and an exhaust port. A first supply passage connecting the air supply port of the supply / exhaust fan and the supply port, the space, the discharge port, and the burner. And a second air supply communication pipe that communicates with the second air supply pipe.

According to the present invention, the heat supplied from the side surface of the combustion chamber is prevented from being transmitted to the inside of the gas stove by the air supplied from the first air supply passage to the space. Along with passing through the space The combustion air that is heated and supplied to the parner via the second air supply communication pipe can improve the combustion temperature of the parner and the radiation conversion efficiency of the porous body.

Further, in a fourth aspect of the present invention, an outer peripheral wall is provided around the side surface of the combustion chamber at a distance from the side surface, and the side wall and the outer peripheral wall are sealed except for an air supply port and an exhaust port. And a cooling air supply means for arranging the discharge port toward a portion of the top plate outside the combustion chamber, and supplying cooling air from the supply port into the space. It is characterized by.

According to the present invention, the cooling air supplied into the space from the supply port by the cooling air supply means passes through the space and flows out of the discharge port from the outside of the combustion chamber of the top plate. It is discharged toward the place. Therefore, similarly to the above-described first aspect, the heat released from the side surface of the combustion chamber due to the air passing through the space is suppressed from propagating into the gas stove, and the discharge port is The portion of the top plate outside the combustion chamber is cooled by the air discharged from the top plate. Accordingly, it is possible to prevent the portion of the top plate outside the combustion chamber from being heated, thereby preventing the user from feeling the heat.

Further, a fifth aspect of the present invention is characterized in that cooling air supply means for supplying cooling air into the combustion chamber is provided.

According to the present invention, the atmosphere temperature in the combustion chamber can be reduced by the air supplied into the combustion chamber by the cooling air supply means. Therefore, the amount of heat that propagates from the side surface of the combustion chamber into the gas stove can be reduced, and in particular, it is possible to prevent the top plate from being overheated when the object to be heated is not placed on the top plate. Can be prevented. The object to be heated placed on the top plate is mainly composed of the panner transmitted to the object to be heated via the top plate and red emitted from the porous body. Since the heating is performed by the outside wire, the influence of the decrease in the ambient temperature in the combustion chamber on the heating power for the heated object is insignificant.

In the fifth aspect, an outer peripheral wall is provided around the side surface of the combustion chamber at an interval from the side surface, and a space sealed by the side surface and the outer peripheral wall except for an air supply port and an exhaust port is provided. And forming the discharge port in communication with the combustion chamber toward the lower surface of the top plate, wherein the cooling air supply means is provided from the supply port into the combustion chamber via the space and the discharge port. It is characterized by supplying cooling air.

According to the present invention, the heat released from the side surface of the combustion chamber due to the air passing through the space is suppressed from propagating into the gas stove, and is supplied from the discharge port into the combustion chamber. Since the air to be blown directly hits the lower surface of the top plate, the effect of cooling the top plate can be enhanced. Further, in the fourth aspect or the fifth aspect, the cooling air supply means is constituted by an air supply branch pipe branched from the air supply passage.

According to the present invention, since the cooling air is supplied into the space or the combustion chamber by the air supply branch pipe, the fan for supplying the cooling air is provided separately from the supply and exhaust fan. No need to provide. Therefore, it is possible to suppress an increase in the cost of the gas stove. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is an external view and a configuration diagram of a gas stove according to a first embodiment of the present invention. FIG. 2 is a configuration diagram of a gas stove according to second and third embodiments of the present invention. FIG. 4 is a configuration diagram of a gas stove according to a fourth embodiment of the present invention. FIG. 4 is a configuration diagram of a gas stove according to fifth and sixth embodiments of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

First to fifth embodiments of the present invention will be described with reference to FIGS. FIG. 1 is an external view and a configuration diagram of a gas stove according to a first embodiment of the present invention, FIG. 2 is a configuration diagram of a gas stove according to second and third embodiments of the present invention, and FIG. FIG. 4 is a configuration diagram of a gas stove according to a fourth embodiment of the present invention. FIG. 4 is a configuration diagram of a gas stove according to fifth and sixth embodiments of the present invention.

First, a first embodiment of the present invention will be described with reference to FIG. Referring to Fig. 1 (a), gas stove 1 is located on the upper surface of a combustion chamber (see Fig. 1 (b)) in which a surface-burning type burner 2 and an annular porous body 3 are accommodated. It heats the cooking object (the object to be heated) placed on the heat-resistant glass top plate 4.

The gas stove 1 supplies combustion air to the burner 2 and sends out the combustion exhaust gas of the burner 2 from the exhaust passage (see FIG. 1 (b)) to the exhaust port 5 through the porous body 3. It has an air supply / exhaust fan 6 and a combustion amount adjustment switch 7 for adjusting the combustion amount of the burner 2. Further, an outer peripheral wall 9 is provided outside the combustion chamber.

Next, FIG. 1 (b) is a cross-sectional view of the gas stove 1 shown in FIG. 1 (a) as viewed from the side, in which a burner 10 is provided with a parner 2 and a porous body 3. . The combustion air supplied through the air supply passage 20 by the supply / exhaust fan 6 and the fuel gas supplied through the nozzle 22 provided at the end of the gas supply pipe 21 are mixed. The mixture is supplied through a pipe 23 to a parner 2. The gas supply pipe 21 is provided with a gas source valve 24 and a gas proportional valve 25 from the upstream side. The gas supply pipe 21 and the nozzle 22 constitute the fuel gas supply means of the present invention. Further, the combustion exhaust gas from the burner 2 is exhausted from an exhaust port 5 (see FIG. 1A) by a supply / exhaust fan 6 through a porous body 3 and an exhaust passage 26. Further, a heat insulating space 12 (corresponding to the space of the present invention) is formed by the side surface 11 of the combustion chamber 10 and the outer peripheral wall 9 provided at a distance from the side surface 11.

The heat insulating space 12 is sealed and formed except for the air supply port 13 and the air discharge port 14. The supply port 13 is provided below the heat insulating space 12 and communicates with the supply passage 20 through a supply branch pipe 15 (corresponding to a cooling air supply means of the present invention). In addition, the discharge port 14 is located along the side of the combustion chamber 10 above the insulated space 12 and outside the combustion chamber 10 of the glass top plate 4 (in the figure, the diameter from the area inside the diameter L 20 to the diameter (Except for the area inside L10).

The operation of the gas stove 1 is controlled by a controller 30 constituted by a microcomputer or the like. The controller 30 is connected to a combustion amount adjustment switch 7. The controller 30 controls the combustion operation of the wrench 2 in accordance with the operation of the combustion amount adjustment switch 7 by the user.

Specifically, the controller 30 adjusts the opening of the gas proportional valve 25 with the gas source valve 24 opened to control the supply flow rate of the fuel gas to the burner 2. In addition to controlling, the flow rate of the combustion air supplied to the parner 2 is controlled by adjusting the rotation speed of the supply / exhaust fan 6.

During the combustion of the burner 2, the hot air 51 from the combustion surface of the burner 2 where the burner flame 50 of the burner 2 is generated and the high-temperature combustion exhaust gas of the burner 2 are heated by passing through. The food is heated via the glass top plate 4 by the radiant heat 52 from the substrate 3.

At this time, the temperature inside the combustion chamber 10 becomes extremely high (about 100 ° C.) due to the hot air 51 from the parner 2 and the radiant heat 52 from the porous body 3. Radiant heat is also released from the side surface 1 of 0. The side surface 11 of the combustion chamber 10 is formed of a sheet metal made of stainless steel or the like, and the inside (the porous body 3 side) of the side surface 11 is exposed to high temperature by the combustion exhaust gas of the parner 2 and oxidized. Emissivity increases.

However, when the burner 2 burns, part of the combustion air (corresponding to the cooling air of the present invention) supplied from the air supply / exhaust fan 6 is supplied from the air supply passage 20 through the air supply branch pipe 15. The air supplied into the heat insulating space 12 and supplied from the supply port 13 of the heat insulating space 12 passes through the heat insulating space and is discharged from the discharge port 14.

Therefore, the heat released from the side surface 11 of the combustion chamber 10 is prevented from propagating into the gas stove 1 by the air passing through the heat insulating space 12. As a result, the heat inside the gas stove 1 becomes abnormally high due to the heat released from the side surface 11 of the combustion chamber 10, and the electrical board (not shown) of the controller 30 and the gas valve 24 It is possible to prevent electrical components such as the gas proportional valve 25 and the fan motor (not shown) of the supply / exhaust fan 6 from being damaged by overheating.

Furthermore, since the heat insulating effect of the heat insulating space 12 and the air passing through the heat insulating space 12 prevents the outer peripheral wall 9 from being heated to a high temperature, the emissivity of the outer peripheral wall 9 may increase due to oxidation. Is prevented.

In addition, since the air that has passed through the insulated space 12 is discharged from the outlet 14 toward the glass top 4, the portion of the glass top 4 where the air hits (from the area inside the diameter L 20 in the figure, The portion excluding the area inside the diameter L10) is cooled by the air. As a result, the heat propagates to the outside of the upper surface of the combustion chamber 10 in the glass top plate 4 (the portion inside the diameter L10 in the figure), thereby causing the user to feel the heat or cooking utensils such as pots. It is possible to prevent the handle portion from becoming hot and difficult to hold. In the first embodiment, the discharge port 14 of the heat insulating space 12 is provided to face the glass top plate 4 outside the combustion chamber 10. The effect of the present invention can be obtained even in the case where it is provided at the position.

In addition, the heat insulation space 12 is sealed and formed except for the air supply port 13 and the air discharge port 14, but even if the heat insulation space 12 is not sealed, the air supply branch pipe 15 is The effect of the present invention can be obtained by supplying air into the heat insulating space 12 through the air.

Next, a second embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the gas stove shown in FIG. 1 are denoted by the same reference numerals and description thereof will be omitted.

In the second embodiment, similarly to the first embodiment, the heat insulation space 12 is formed by being sealed except for the air supply port 13 and the air discharge port 40, and the heat insulation space is formed. An air supply branch pipe 15 communicating the supply port 13 of 12 with the air supply passage 20 is provided. Further, an exhaust gas recirculation pipe 42 is provided for communicating the exhaust port 40 of the heat insulating space 12 and the air intake port 41 of the air supply / exhaust fan 6.

Therefore, during the combustion of the Pana 2, the air supplied through the air supply branch pipe 15 flows from the supply port 13 through the heat insulating space 12, and from the discharge port 40 through the exhaust return pipe 42. And is introduced into the air intake 41 of the supply / exhaust fan 6.

In this case, air heated by the heat released from the side of the combustion chamber 10 when passing through the adiabatic space is introduced from the exhaust gas recirculation pipe 42 to the air intake 41 of the supply / exhaust fan 6. . Then, the heated air is mixed with room air sucked into the air suction port 41 and supplied to the air supply passage 20. Therefore, similarly to the first embodiment, it is possible to suppress the heat released from the side surface of the combustion chamber 10 from being transmitted to the gas stove by the air flowing through the heat insulating space 12. Can be. In addition, the temperature of the combustion air supplied to the parner 2 increases, and as a result, the temperature of the combustion flame 50 of the parner 2 increases, and the combustion speed of the parner 2 also increases. The surface temperature of the gas increases and the temperature of the combustion exhaust gas discharged through the porous body 3 also increases, so that the radiation conversion efficiency of the porous body 3 can be improved.

Next, a third embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the gas stove shown in FIGS. 1 and 2 are denoted by the same reference numerals, and description thereof will be omitted.

In the third embodiment, similarly to the second embodiment, the heat insulation space 12 is provided except for the air supply ports 43 (43a, 43b) and the discharge ports 40. An exhaust gas recirculation pipe 42 is provided which is formed in a sealed manner and communicates with the exhaust port 40 of the heat insulating space 12 and the air intake port 41 of the air supply / exhaust fan 6.

However, the air supply branch pipe 15 (see FIG. 2A) in the second embodiment is not provided, and the supply port 43 is provided to be open to the lower part of the heat insulating space 12. . In this case, the air is supplied from the supply port 43 into the heat insulating space 12 by the operation of the air supply / exhaust fan 6, and the air is heated by the heat released from the side surface of the combustion chamber 10 when passing through the heat insulating space. Then, the air is introduced into the air intake 41 of the supply / exhaust fan 6 through the intake communication pipe 42.

Here, in the second embodiment, since air is supplied to the adiabatic space 12 via the air supply branch pipe 15, the air heated when passing through the adiabatic space 12 is again supplied. The heat is supplied to the heat insulation space 12 and the heat insulation effect of the heat insulation space 12 is slightly reduced.

In contrast, in the third embodiment, room air is supplied into the heat insulating space 12 from the open air supply port 13. For this reason, the temperature of the combustion air supplied to the parner 2 is increased without lowering the heat insulating effect in the heat insulating space 1 2, thereby increasing the combustion temperature of the burner 2 and increasing the temperature of the porous body 3. Radiation conversion efficiency can be improved.

Next, a fourth embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the gas stove shown in FIG. 1 are denoted by the same reference numerals and description thereof will be omitted.

In the fourth embodiment, the heat insulating space 12 is formed in a sealed manner except for the air supply port 45 and the discharge port 46, and is formed so as to extend around the bottom of the combustion chamber. ing.

An air supply passage 20 (corresponding to a first air supply communication pipe of the present invention) is connected to a supply port 45 of the heat insulation space 12, and a mixing pipe 23 (the second air supply communication pipe of the present invention). (Corresponding to a communication pipe) is connected to the discharge port 46 of the heat insulation space 12. Therefore, the air drawn into the air supply / exhaust fan 6 is supplied to the gas burner 2 through the air supply passage 20, the heat insulating space 12, and the mixing pipe 23.

In this case, the air passing through the heat insulating space 12 from the supply port 45 to the discharge port 46 can enhance the heat insulating effect of the heat insulating space 12 and be released from the side and bottom surfaces of the heat insulating space 12. The air passing through the heat insulating space 12 can be heated by the heat.

Since the heated air is supplied to the burner 2 through the mixing pipe 23 as combustion air, the combustion temperature of the burner 2 can be increased as in the second and third embodiments. In addition to the above, the radiation conversion efficiency of the porous body 3 can be improved.

Next, a fifth embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the gas stove shown in FIG. 1 are denoted by the same reference numerals and description thereof will be omitted.

In the fifth embodiment, the outlet 60 of the heat insulating space 12 is provided in communication with the fuel chamber 10. Therefore, during the combustion of the Pana 2, the air supplied via the air supply branch 15 flows from the supply port 13 through the heat insulating space 12. As a result, it flows into the combustion chamber 10 from the outlet 60.

Then, since the temperature of the atmosphere in the combustion chamber 10 is reduced by the air flowing into the combustion chamber 10 from the discharge port 60, the amount of heat released from the side surface of the combustion chamber 10 is reduced. Thus, it is possible to prevent the inside of the gas stove 1 from becoming abnormally high in temperature due to the heat released from the side surface 11 of the combustion chamber 10. In addition, since the ambient temperature in the combustion chamber 10 decreases, the upper surface of the glass top plate 4 can be prevented from being overheated.

In the fifth embodiment, air is supplied into the combustion chamber 10 via the heat insulating space 12. However, the combustion is performed from the air supply branch pipe 15 without the heat insulating space 12. The effects of the present invention can also be obtained when air is directly supplied into the chamber 10.

Next, a sixth embodiment of the present invention will be described with reference to FIG. Note that the same components as those of the gas stove shown in FIG. 1 are denoted by the same reference numerals and description thereof will be omitted.

In the sixth embodiment, the outlet 61 of the heat insulating space 12 is

As in the second embodiment, it communicates with the combustion chamber 10, and the discharge port 61 is arranged toward the lower surface of the glass top plate 4.

Therefore, the heat insulating effect by the heat insulating space 12 can be obtained as in the first embodiment. Further, the effect of cooling the glass top plate 4 by the air blown from the outlet 61 toward the glass top plate 4 is enhanced.

However, the ambient temperature in the combustion chamber 10 can be reduced as in the fifth embodiment.

In the fifth and sixth embodiments, the cooling air is supplied into the heat insulation chamber 12 by the air supply / exhaust fan 6, but the cooling air is supplied by the fan provided separately from the air supply / exhaust fan 6. Cooling air may be supplied into the heat insulating space 12. Further, in the first to sixth embodiments, the gas stove 1 in which the porous body 3 is disposed outside the burner 2 is shown. The present invention can be applied to a configuration in which the components are arranged. Industrial applicability

The gas stove according to the present invention includes a surface-burning burner provided in a combustion chamber in which an object to be heated is placed on a top plate on the upper surface and opposed to the top plate, and a porous member for radiating exhaust heat. It has a body and can be used for gas stoves with enhanced thermal efficiency.

Claims

The scope of the claims

1. In a combustion chamber where an object to be heated is placed on a top plate on the top surface, a surface-burning type wrench and a gas-permeable porous body provided opposite to the top plate, and fuel gas is supplied to the wrench. Fuel gas supply means, an exhaust passage having one end communicating with the combustion chamber via the porous body and the other end communicating with an exhaust port, and supplying combustion air to the burner via an air supply passage. A supply / exhaust fan for sending out the combustion exhaust gas of the parner to the exhaust port through the porous body and the exhaust passage, wherein the heat emitted from the parner and heated by the exhaust gas of the parner are provided. In a gas stove that heats an object to be heated through the top plate by radiating heat from a porous body,

An outer peripheral wall is provided around the side surface of the combustion chamber at an interval from the side surface, a space is formed by the side surface and the outer peripheral wall, and an air supply branch pipe is provided for communicating the space with the air supply passage. A gas stove characterized by the fact that:

2. The space is sealed except for an air supply port and a discharge port, and the air supply branch pipe is connected to the supply port,

The gas stove according to claim 1, further comprising an exhaust gas recirculation pipe that communicates the exhaust port with the air supply / exhaust fan and recirculates the air exhausted from the exhaust port to the air supply / exhaust fan.

3. A surface-burning type burner and a gas-permeable porous body provided opposite the top plate in a combustion chamber in which the object to be heated is placed on the top plate, and fuel gas is supplied to the parner. A fuel gas supply means, an exhaust passage having one end communicating with the combustion chamber via the porous body and the other end communicating with an exhaust port, and supplying combustion air to the parner via an air supply passage. A supply / exhaust fan for delivering combustion exhaust gas from the burner to the exhaust port through the porous body and the exhaust passage, wherein heat is released from the burner and heated by the burner exhaust gas. The object to be heated is radiated through the top plate by heat radiation from the porous body. In the gas stove to be heated,

An outer peripheral wall is provided around the side surface of the combustion chamber at an interval from the side surface, and the side surface and the outer peripheral wall form a sealed space except for an air supply port and an exhaust port. A gas stove provided with an exhaust gas recirculation pipe which communicates with a supply / exhaust fan and recirculates air discharged from the exhaust port to the supply / exhaust fan.

4. In the combustion chamber in which the object to be heated is placed on the top plate on the top surface, a surface-burning type wrench and a gas-permeable porous body provided opposite to the top plate, and fuel gas is supplied to the wrench. A fuel gas supply means, an exhaust passage having one end communicating with the combustion chamber via the porous body and the other end communicating with an exhaust port, and supplying combustion air to the parner via an air supply passage. A supply / exhaust fan for sending combustion exhaust gas from the parner to the exhaust port through the porous body and the exhaust passage, wherein the heat release from the parner and the porous exhaust gas heated by the combustion exhaust gas from the parner are provided. In a gas stove that heats an object to be heated through the top plate by radiating heat from a body,

An outer peripheral wall is provided around the side surface of the combustion chamber at an interval from the side surface, and the side surface and the outer peripheral wall form a sealed space excluding an air supply port and an exhaust port,

A first air supply communication pipe communicating the air supply outlet of the air supply / exhaust fan with the air supply port; a second air supply communicating the space with the air outlet; Gas stove characterized by comprising a communication pipe

5. A surface-burning type wrench and a gas-permeable porous body provided opposite to the top plate in a combustion chamber in which an object to be heated is placed on the top plate, and fuel gas is supplied to the wrench. An exhaust passage having one end communicating with the combustion chamber through the porous body and the other end communicating with an exhaust port, and supplying air to the parner. A supply / exhaust fan that supplies combustion air through a passage and sends out the combustion exhaust gas of the parner to the exhaust port through the porous body and the exhaust passage. In a gas stove for heating an object to be heated via the top plate by radiating heat from the porous body heated by the combustion exhaust gas of the wrench,

An outer peripheral wall is provided around the side surface of the combustion chamber at an interval from the side surface, and the side surface and the outer peripheral wall form a sealed space excluding an air supply port and an exhaust port, and the exhaust port Is arranged toward a portion of the top plate outside the combustion chamber,

A gas stove comprising cooling air supply means for supplying cooling air from the supply port into the space.

6. A surface-burning type burner and a gas-permeable porous body provided opposite to the top plate in a combustion chamber in which an object to be heated is placed on the top plate, and fuel gas is supplied to the panner. A fuel gas supply means, an exhaust passage having one end communicating with the combustion chamber via the porous body and the other end communicating with an exhaust port, and supplying combustion air to the parner via an air supply passage. A supply / exhaust fan for sending combustion exhaust gas from the parner to the exhaust port through the porous body and the exhaust passage, wherein the heat release from the parner and the porous exhaust gas heated by the combustion exhaust gas from the parner are provided. In a gas stove that heats an object to be heated through the top plate by radiating heat from a body,

A gas stove comprising cooling air supply means for supplying cooling air into the combustion chamber.

7. An outer peripheral wall is provided around the side surface of the combustion chamber at an interval from the side surface, and the side surface and the outer peripheral wall form a sealed space excluding an air supply port and an exhaust port, and the exhaust port is provided. Is disposed in communication with the combustion chamber toward the lower surface of the top plate, The gas stove according to claim 6, wherein the cooling air supply means supplies cooling air from the supply port to the combustion chamber through the space and the discharge port.

8. The gas stove according to any one of claims 5 to 7, wherein the cooling air supply means is constituted by an air supply branch pipe branched from the air supply passage.