JP2016166712A - Heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a heating cooker capable of preventing defective combustion of an oven burner and preventing a problem on partial overheat deformation of components in a combustion chamber by uniformly supplying a secondary air for combustion taken from a front part of the combustion chamber to a group of burner ports at a rear part regardless of the shape of the oven burner.SOLUTION: An oven burner 2 has the shape having an expansion portion 2c vertically expanded close to a gas supply port of a burner body, is provided with an upper air straightening plate 6a obtained by integrally forming an upper vertical piece 60a having the laterally-long rectangular shape extending upward along the group of burner ports 26, and an upper flange piece 61a extending to the upstream side from the upper end side of the upper vertical piece 60a, is disposed at an upper face side of the burner body at an upstream side of an air flow channel with respect to the group of burner ports 26, and a height of the upper flange piece 61a is determined to be higher than a top surface of the expansion portion 2c and lower than an upper plate 22 of a combustion chamber 20.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a cooking device, and more particularly to a cooking device provided with a hot air circulation type oven.

In recent years, convection-type ovens using hot air circulation have become widespread, and heating cookers in which such ovens are provided in built-in gas stoves have also been proposed (for example, Patent Documents 1 and 2).
The oven cabinet includes a heating chamber in which an object to be cooked is accommodated, and a combustion chamber that communicates with the heating chamber and generates combustion exhaust gas by burning gas with an oven burner. This type of heating cooker indirectly cooks the food to be cooked by feeding hot air of the combustion exhaust gas generated in the combustion chamber into the heating chamber by a circulation fan and circulating the hot air in the heating chamber. Compared to a heating chamber provided with a direct heating means such as a burner, uneven baking is less likely to occur in the cooking object, and the inside of the cooking object can be evenly baked.

  The oven cabinet in such a built-in heating cooker is severely limited in space, and if the height of the heating chamber is to be secured to some extent, there is no room in the height of the combustion chamber. Therefore, it is necessary to use a flat burner as the oven burner disposed in the combustion chamber.

  The burner includes a flat burner body in which a large number of flame hole groups open toward the rear of the combustion chamber in the left and right width direction, and a venturi portion that communicates with the burner body and penetrates one side plate of the combustion chamber. A venturi section of the burner body for supplying the mixed gas of the fuel gas and the primary air for combustion smoothly from the gas supply port of the venturi section through the burner body to each flame hole and uniformly in the left-right direction. A bulging portion that bulges in the vertical direction is formed near the gas supply port on the side.

JP2013-213649A Japanese Patent Laying-Open No. 2015-7516

  By the way, when the oven burner is combusted, by rotating the circulation fan, external air is taken into the combustion chamber from the front of the combustion chamber as secondary combustion air. Therefore, the space formed between the upper or lower plate of the combustion chamber and the upper and lower surfaces of the flat burner body as described above becomes an air flow path through which the air taken in from the front flows backward, and the flame The secondary air for combustion is supplied to the hole group.

  However, in the region where the bulging portion is formed, the distance between the burner body and the upper and lower plates of the combustion chamber is shorter than in other regions, so the air flow path is narrowed. Therefore, in the region where the bulging portion is formed, the ventilation resistance is larger than in other regions, and the air does not flow easily. Therefore, the amount of secondary air for combustion supplied to the flame hole group in the left-right direction Differences are likely to occur. As a result, in the flame hole group near the gas supply port in which the bulging portion is formed, air failure of the external flame is likely to occur and combustion failure is likely to occur, and the combustion flame is easily lifted upward. Therefore, the upper plate of the combustion chamber is beaten by the lifted combustion flame, or the temperature of the bulging portion side in the combustion chamber becomes high, and other components are partially overheated and deformed by the radiant heat. Occurs. For example, in Patent Document 2, an air rectifying plate that is erected in the vertical direction is provided near the flame hole group of the oven burner. However, when such an air rectifying plate is provided, the air flow resistance of the bulging portion having a large ventilation resistance is provided. There is a problem that the downstream side is overheated by radiant heat.

  The present invention has been made in view of the above-described problems, and an object of the present invention is a heating cooker that sends hot air generated in a combustion chamber to the heating chamber and circulates it, and is disposed in a combustion chamber having a narrow combustion space. The secondary air for combustion taken in from the front of the combustion chamber is uniformly supplied to the flame holes of the oven burner, preventing the burn failure of the oven burner and overheating deformation of the upper plate and components of the combustion chamber Is to prevent.

The present invention taken to achieve the above object
A combustion chamber provided with an oven burner and provided with an air supply port for taking in external air in front of the oven burner;
A heating chamber that is placed in communication with the combustion chamber above the combustion chamber and that accommodates the food;
A circulation fan that takes in external air into the combustion chamber and sends hot air generated in the oven burner into the heating chamber for circulation.
The oven burner is a heating cooker including a flat burner body in which a number of flame hole groups open toward the downstream side of the air flow path in the left-right direction of the combustion chamber,
In the vicinity of the gas supply port of the burner main body, a bulging portion that communicates with the gas supply port and bulges in the vertical direction is formed.
A horizontally-long rectangular upright piece extending upward along the flame hole group on the upper surface side of the burner body and upstream of the air channel from the flame hole group, and air flow from the upper end side of the upper standing piece An upper air rectifying plate integrally formed with the upper flange piece extending upstream of the road is provided;
The upper flange piece is a heating cooker provided at a position above the upper surface of the bulging portion bulging upward and lower than the upper plate of the combustion chamber.

  When the oven burner is disposed in the combustion chamber, the air flow path between the upper plate of the combustion chamber and the upper surface of the burner main body of the oven burner is larger in the region where the bulge is formed. Although it is narrower than the area where it is not formed, by providing the upper air flow straightening plate along the flame hole group on the upper surface side of the burner main body, the upper flange piece of the upper air flow straightening plate and the combustion The difference in the height of the air flow path formed between the upper plate of the chamber is reduced. Thereby, in the vicinity of the flame hole group of the oven burner, the difference in the ventilation resistance in the left-right direction is reduced, and the secondary combustion air can be uniformly supplied to the flame hole group from above. Moreover, since the upper flange piece extends toward the upstream side of the air flow path, it is not easily affected by the combustion flame formed downstream from the oven burner, and combustion is fresh external air. Directly cooled by secondary air. The upper standing piece is formed integrally with the flange piece, so that the strength of the entire upper air rectifying plate can be increased, and the upper flange piece has the combustion secondary air along the upper flange piece. By flowing, it is positively cooled, whereby the continuous upright piece can also obtain a cooling effect.

Other inventions made in order to achieve the above object are:
A combustion chamber provided with an oven burner and provided with an air supply port for taking in external air in front of the oven burner;
A heating chamber that is placed in communication with the combustion chamber above the combustion chamber and that accommodates the food;
A circulation fan that takes in external air into the combustion chamber and sends hot air generated in the oven burner into the heating chamber for circulation.
The oven burner is a heating cooker including a flat burner body in which a number of flame hole groups open toward the downstream side of the air flow path in the left-right direction of the combustion chamber,
In the vicinity of the gas supply port of the burner main body, a bulging portion that communicates with the gas supply port and bulges in the vertical direction is formed.
A horizontally elongated lower standing piece extending downward along the flame hole group on the lower surface side of the burner body and upstream of the air flow path from the flame hole group, and an air flow from the lower end side of the lower standing piece A lower air rectifying plate integrally formed with a lower flange piece extending upstream of the road is provided;
The lower flange piece is provided below the lower surface of the bulging portion that bulges downward and higher than the lower plate of the combustion chamber.
According to the cooking device, since the lower air rectifying plate is provided below the oven burner, the height of the lower air flow path formed between the lower flange piece and the lower plate of the combustion chamber in the left-right direction. The difference in thickness is reduced, the difference in ventilation resistance in the left-right direction can be reduced, and the secondary combustion air can be uniformly supplied to the flame hole group from below. Moreover, the overheat deformation of the lower air rectifying plate can be prevented by the strength increase by the lower flange piece and the cooling effect of the lower standing piece.

  Moreover, it is good also as a heating cooker with which an above-mentioned upper air baffle plate and a lower air baffle plate are each provided in the upper and lower both sides of a burner main body, More preferably, an upper air baffle plate and a lower air baffle plate are each provided. The heating cooker is configured such that the distance between the upper flange piece and the upper plate of the combustion chamber and the distance between the lower flange piece and the lower plate of the combustion chamber are substantially the same. In this case, almost the same amount of secondary air for combustion is supplied to the flame hole group from the air flow paths formed both above and below the oven burner. As a result, the combustion flame from the flame hole group extends linearly toward the downstream side, and the combustion flame lift can be further prevented.

In the heating cooker, more preferably,
A gap portion serving as an air flow path is provided between at least one end portion in the left-right direction of the upper air rectifying plate and / or at least one end portion in the left-right direction of the lower air rectifying plate and the side plate of the combustion chamber. .
According to the cooking device, a part of the external air taken into the combustion chamber does not pass above and below the upper and lower air rectifying plates, and the end portions of the upper and lower air rectifying plates in the left and right direction and the side plates of the combustion chamber Pass through the gap between the two in a short-circuited manner. Thereby, when component parts, such as a spark plug and a temperature sensor, are protrudingly provided on one side plate of the combustion chamber, these can be directly cooled by short-circuit air.

As described above, according to the present invention, by providing the upper air rectifying plate, even an oven burner having a burner body in which a bulging portion is formed near the gas supply port is provided above the combustion chamber in the left-right direction. The difference in ventilation resistance of the air flowing through can be reduced, and the secondary air for combustion can be uniformly supplied from above to the flame hole group. As a result, the occurrence of poor combustion in the flame hole group located on the downstream side of the bulging portion is suppressed, and overheating deformation of the upper plate of the combustion chamber and peripheral components due to partial combustion flame lift can be prevented. Further, the upper flange piece extends to the upstream side of the air flow path, and the upper standing piece and the upper flange piece are integrally formed, so that a high cooling effect is obtained and the upper air rectifying plate The overall strength can be increased. Therefore, it is possible to prevent overheating deformation of components such as the upper air rectifying plate due to radiant heat.
In addition, by providing the lower air rectifying plate, the secondary air for combustion can be supplied uniformly to the flame hole group from below, and the lower air rectifying plate can be provided by the strength improvement by the lower flange piece and the cooling effect of the standing upright piece. It is possible to prevent overheating deformation of components such as. In particular, by forming an air flow path having an equal height in the vicinity of the flame hole group in the vertical direction, the combustion flame extends linearly toward the downstream side, so that the lift of the combustion flame is further suppressed, and overheating deformation is further reduced. Can be prevented.
In addition, a gap is provided between the left and right ends of the upper and lower air flow straightening plates and the side plate of the combustion chamber to form an air flow path through which short-circuited air that does not pass through the flame hole group flows, and the side region is positively In such a case, the components disposed on the side such as the spark plug can be effectively cooled.

It is a schematic cross-sectional perspective view which shows the heating cooker in embodiment of this invention. It is a disassembled perspective view which shows the combustion chamber of the heating cooker in embodiment of this invention. It is a perspective view which shows the oven burner of the combustion chamber of the heating cooker in embodiment of this invention. It is a principal part expansion cross-sectional perspective view which shows the back part of the heating cooker in embodiment of this invention. It is a perspective view which shows another example of the heating cooker in embodiment of this invention.

Hereinafter, embodiments for carrying out the present invention will be described with reference to the accompanying drawings.
FIG. 1 is a schematic cross-sectional perspective view of a built-in gas stove in which a stove body (1) of a gas stove is incorporated in a state of being dropped into a countertop opening of a system kitchen as a heating cooker according to an embodiment of the present invention. FIG. 2 is an exploded perspective view showing the combustion chamber of the oven cabinet incorporated in the gas stove. FIG. 3 is a perspective view of a part of the combustion chamber as viewed from the rear, and FIG. 4 is an enlarged cross-sectional view of the main part showing the downstream end of the oven burner.
As shown in FIG. 1, the gas stove is provided with a heating chamber (10) in which cooking objects can be taken in and out by opening and closing the front door (11) of the stove body (1), as shown in FIG. A combustion chamber (20) having an oven burner (2) provided below and provided with gas from a gas supply pipe (not shown) is disposed.
In the present specification, the door (11) side is referred to as the front, the back side is referred to as the rear, the width direction of the combustion chamber (20) is referred to as the left-right direction, and the height direction is referred to as the up-down direction.

  The heating chamber (10) is box-shaped from the upper wall (12), the lower wall (13), the left and right side walls (14) and (14) that constitute the ceiling, and the rear wall (15) at the rear (back side) The front wall can be opened by rotating the door (11) forward, and on the plate (52) in the heating chamber (10), for example, a food such as fish Is placed.

Behind the upper wall (12) of the heating chamber (10), a number of exhaust ports (12a) communicating with the exhaust outlet (50) through an exhaust passage (5) formed above the upper wall (12) Is formed. In addition, on the left and right sides of the rear wall (15) of the heating chamber (10), there are formed a number of blow holes (15a) (15a) for sending hot air into the heating chamber (10), and the center A plurality of suction holes (15b) for taking in hot air in the heating chamber (10) are formed.
Further, behind the rear wall (15) of the heating chamber (10), a hot air passage (30) is formed for sending hot air of the combustion exhaust gas generated in the combustion chamber (20) to the heating chamber (10) for circulation. ing.

As shown in FIGS. 1 and 2, the combustion chamber (20) is surrounded by an upper plate (22), a lower plate (23), and left and right side plates (24a) and (24b) constituting the ceiling. At the same time, the rear side is configured to communicate with the hot air passage (30), and an oven burner (2) is disposed at the approximate center in the front-rear direction in the combustion chamber (20). The upper plate (22) is an inner upper plate extending from the front to the rear of the outer upper plate (22a) constituting the outer shell of the combustion chamber (20) and the flame hole group (26) of the oven burner (2). The plate (22b) is provided, but it may be composed of only the outer upper plate (22a).
An air supply port (21) for taking in external air is formed in the front surface of the combustion chamber (20), and behind the oven burner (2) of the upper plate (22) of the combustion chamber (20), A communication port (27) communicating with the hot air passage (30) is formed. Behind the hot air passage (30) is a circulation fan (31) for taking outside air into the combustion chamber (20) from the air supply port (21), and a motor for rotating it through the rotating shaft (42) ( 4) is provided.

  As shown in FIGS. 2 to 4, the oven burner (2) is a flame hole composed of a number of slit-like flame holes that open toward the rear by superimposing two pressed metal plates. A flat burner body (2a) in which the groups (26) are arranged in the left-right direction, and a venturi section provided on one side of the burner body (2a) and penetrating the side plate (24a) of the combustion chamber (20) (2b). The open end of the venturi section (2b) is a gas supply port (25) into which a nozzle (not shown) for supplying fuel gas is inserted and an intake port for primary air for combustion. The gas supply port (25) It is exposed to the outside from the side plate (24a).

  Near the gas supply port (25) of the burner body (2a) where the venturi (2b) is formed, a bulging portion (2c) that bulges in the vertical direction is formed. Thus, when a mixed gas of fuel gas and primary combustion air is supplied from the gas supply port (25) through the venturi (2b) into the burner body (2a), the left and right direction of the flame hole group (26) The mixed gas can be distributed smoothly and uniformly over the entire area.

  External air taken from the air inlet (21) of the combustion chamber (20) is sent to the rear flame hole group (26), but at this time, above the oven burner (2) and above the combustion chamber. Between the plate (22) and between the lower part of the oven burner (2) and the lower plate (23) of the combustion chamber functions as an air flow path (200).

  As shown in FIG. 4, the upper and lower surfaces of the burner body (2a) on the downstream side of the bulging portion (2c) and on the upstream side of the flame hole group (26) are respectively made of metal upper and lower air rectifying plates (6a). ) (6b). Since the upper and lower air rectifying plates (6a) and (6b) have the same configuration on the upper and lower surfaces of the burner body (2a), the upper air rectifying plate (6a) will be mainly described below.

  The upper air baffle plate (6a) is an upper side of a horizontally long rectangular shape extending upward at substantially the same height in the left-right direction along substantially the entire upper area of the flame hole group (26) on the upstream side of the flame hole group (26). An upright piece (60a), an upper flange piece (61a) extending from the upper end side of the upper upright piece (60a) to the upstream side of the air flow path (200) with substantially the same length, The upper inner flange piece (62a) extending from the lower end side of the piece (60a) to the downstream side of the air flow path (200) with substantially the same length, and the lower side from the left and right sides of the upper flange piece (61a) And an upper side plate (63a).

  The upright erected piece (60a) is formed of a continuous surface that stands upright from the upper surface of the burner body (2a) toward the inner upper plate (22b) of the combustion chamber (20). The upper standing piece (60a) may be formed so as to be inclined so that the upper end side is located on the upstream side of the air flow path (200) from the lower end side.

The height of the upright piece (60a) is set so that the upper flange piece (61a) is located above the upper surface of the bulging part (2c) and lower than the inner upper plate (22b) of the combustion chamber (20). In the present embodiment, the upper flange piece (61a) is located on the downstream side of the bulging portion (2c) from the upper end side of the upper standing piece (60a) toward the upstream side of the air flow path (200). It is formed of a continuous surface extending substantially parallel to the inner upper plate (22b) so as to cover the end portion. Therefore, the air sent from the upstream side of the upper air flow path (200) is mainly a space between the upper surface of the upper flange piece (61a) and the lower surface of the inner upper plate (22b) of the combustion chamber (20). And is supplied to the downstream flame hole group (26).
Similarly, the lower flange piece (61b) extends substantially in parallel to the lower plate (23) from the lower end side of the lower standing piece (60b) toward the upstream side of the air flow path (200). In the embodiment, the upper flange piece (61a) is longer than the upper flange piece (61a). However, the upper flange piece (61a) may have the same length.

  The upper inner flange piece (62a) is the upper surface of the burner body (2a) from the lower end side of the upper standing piece (60a) toward the downstream side of the air flow path (200) from the flame hole group (26) to the upstream side. And a continuous surface extending substantially in parallel.

  The left and right upper side plates (63a) and (63a) respectively extend substantially parallel to the side plates (24a) and (24b) of the combustion chamber (20), and are connected to the lower side plates (63b) and (63b). Has been. Also, the length in the left-right direction of the upright piece (60a), the upper flange piece (61a), and the upper inner flange piece (62a) is determined by the left and right upper side plates (63a) (63a) and the combustion chamber (20). It is set to such a length that gap portions (35) and (35) having a predetermined width are formed between the side plates (24a) and (24b). Therefore, a part of the air sent from the upstream side of the air flow path (200) does not pass through the region where the flame hole group (26) is formed, and the side plates (63a) (63a) and It becomes the short-circuited air passing through the gaps (35) and (35) between the side plates (24a) and (24b) and flows downstream. On the downstream side of these gaps (35) and (35), there are spark plugs (34) and temperature sensors (36) and (37) for judging combustion abnormality in a manner of penetrating the side plates (24a) and (24b). Is provided.

In order to perform cooking using the gas stove according to the present embodiment, first, the door (11) is rotated forward, the plate (52) in the heating chamber (10) is pulled out, and fish, meat, etc. are covered. After installing the food, the door (11) is closed.
Although not shown, when the cooking start switch is turned on, the motor (4) is driven to start the rotation of the circulation fan (31) fixed to the tip of the rotating shaft (42), and the air supply port (21 ) Fresh external air is taken into the combustion chamber (20). The taken-in air passes through the air flow path (200) and the gap (35) formed above and below the oven burner (2), respectively, and rearward of the upper and lower air rectifying plates (6a) and (6b). It is sent to the flame hole group (26) as secondary air for combustion, and cools the spark plug (34) and the temperature sensors (36), (37).

  At the same time, in the venturi section (2b), the fuel gas supplied from the nozzle inserted into the gas supply port (25) and the combustion primary air taken in from the gas supply port (25) are mixed to produce a mixed gas. It is generated and sent from the burner body (2a) to the flame hole group (26). When this mixed gas is ignited by the spark plug (34), a combustion flame is formed in the flame hole group (26), and combustion of the oven burner (2) is started.

  The hot air of the combustion exhaust gas generated in the combustion chamber (20) by the combustion of the oven burner (2) is sent from the communication port (27) to the hot air passage (30) by the circulation fan (31), and the circulation passage case (40) Through the opening (40a) of the rear wall (15), the blowout holes (15a) (15a) formed on the left and right sides of the rear wall (15) are fed into the heating chamber (10). Then, the hot air sent into the heating chamber (10) returns from the central suction hole (15b) of the rear wall (15) to the hot air passage (30), and again, the opening of the circulation passage case (40) ( 40a) is returned to the heating chamber (10) through the blow holes (15a) and (15a).

  Thus, by circulating hot air in the heating chamber (10), the food to be cooked such as fish and meat stored in the heating chamber (10) is oven-cooked, and the hot air in the heating chamber (10) is From the exhaust port (12a) formed in the upper wall (12), the air is exhausted from the exhaust outlet (50) to the outside through the exhaust passage (5).

In the heating cooking, a bulging portion (2c) that bulges in the vertical direction is formed near the gas supply port (25) of the burner body (2a) where the venturi portion (2b) is formed. When the air rectifying plates (6a) and (6b) are not provided, in the region where the bulging portion (2c) is formed, the air in the vertical direction is larger than the region where the bulging portion (2c) is not formed. The flow path (200) becomes narrow.
However, in the present embodiment, the upper and lower air rectifying plates (6a) and (6b) having the upper and lower upright pieces (60a) and (60b) and the upper and lower flange pieces (61a) and (61b) as described above are the burner body (2a). The upper and lower surfaces of the upper and lower air flow paths (200) on the upstream side in the vicinity of the flame hole group (26) even if the bulging portion (2c) is formed. The difference is reduced. Accordingly, since the difference in ventilation resistance between the air flow paths (200) in the left-right direction is reduced, the secondary combustion air is uniformly distributed from the upper and lower air flow paths (200) to each of the downstream flame hole groups (26). Can supply. As a result, primary combustion air and secondary combustion air are supplied to each flame hole at a constant ratio, so that partial combustion failure of the flame hole group (26) in the left-right direction is prevented, and combustion is performed. Flame lift is suppressed.

  Further, in the heating cooker, the distance between the upper flange piece (61a) in the upper and lower air rectifying plates (6a) (6b) and the inner upper plate (22b) of the combustion chamber (20), and the lower flange piece (61b ) And the lower plate (23) of the combustion chamber (20) are provided so as to be substantially the same, the upper and lower air flow paths (200) are connected to the flame hole group (26). A similar amount of combustion secondary air is supplied. Therefore, the combustion flame from the flame hole group (26) extends linearly toward the downstream side, and the lift of the combustion flame can be suppressed. Accordingly, it is possible to prevent inconvenience that a part of the upper plates (22a) and (22b) and the like of the combustion chamber (20) becomes hot and deforms due to overheating.

  Further, since the upper and lower flange pieces (61a) (61b) extend toward the upstream side of the air flow path (200), they are affected by the combustion flame formed downstream from the oven burner (2). Besides, it is directly cooled by the air taken in from the outside that passes through the air flow path (200). Since the upper and lower standing pieces (60a) and (60b) are formed integrally with the upper and lower flange pieces (61a) and (61b), the upper and lower flange pieces (61a) and (61b) are actively cooled. As a result, the vertically standing pieces (60a) and (60b) that are continuous therewith can also obtain a cooling effect. Furthermore, since the upper and lower standing pieces (60a) (60b) and the upper and lower flange pieces (61a) (61b) are integrally formed, the strength of the upper and lower air rectifying plates (6a) (6b) can be increased. it can. Thereby, even if the peripheral parts near the flame hole group (26) are heated and the upper and lower air rectifying plates (6a) and (6b) are heated by the radiant heat, they are hardly deformed by overheating.

  Further, in the left-right direction, a gap (35) is formed between the upper and lower air rectifying plates (6a) (6b) and the side plates (24a) (24b) of the combustion chamber (20), and the air supply port (21 ) Part of the external air taken into the combustion chamber (20) passes through the gap (35) to the side plates (24a) (24b) as short-circuited air that is not supplied to the flame hole group (26). Sent along the downstream side. And, on the downstream side of the gap (35), spark plugs (34) and temperature sensors (36) (37) protrude from the side plates (24a) (24b) into the combustion chamber (20). These components are directly cooled by the cold short circuit air. Thereby, even if these components are heated by radiant heat, they are not easily overheated.

  The upper and lower air rectifying plates (6a) and (6b) have upper and lower inner flange pieces (62a) and (62b) that extend downstream from the lower end or upper end of the upper and lower standing pieces (60a) and (60b). By aligning the upper and lower inner flange pieces (62a) and (62b) with the upper and lower surfaces of the burner body (2a) so that the secondary air does not enter the gap, the combustion secondary air is passed between the two flame hole groups (26 ) Is difficult to flow. Thereby, the fluctuation | variation of the ratio of the combustion primary air and the combustion secondary air is further suppressed.

In order to further improve the cooling effect of the upper and lower flange pieces (61a) and (61b), as shown in FIG. 5, one or more convex portions (65) may be provided on the upper and lower flange pieces (61a) and (61b). According to this, since the surface area of the upper and lower flange pieces (61a) and (61b) is increased, the upper and lower flange pieces (61a) and (61b) can be efficiently cooled by the air flowing through the air flow path (200), and each convex The part (65) also functions as a reinforcing bead, and the upper and lower air rectifying plates (6a) and (6b) are more difficult to overheat and deform.
In addition, as a convex part, it may replace with a convex strip as shown in FIG. 5, and may arrange many round convex parts and square convex parts along the longitudinal direction of an upper and lower flange piece (61a) (61b).

  Further, the upper and lower side plates (63a) and (63b) are taken in from the air supply port (21) as a configuration that extends so as to contact the upper plate (22) and the lower plate (23) of the combustion chamber (20). A configuration may be adopted in which external air is surely divided into air that passes through the air flow path (200) and air that passes through the gap (35).

  In the above embodiment, the upper and lower air rectifying plates (6a) and (6b) are provided on the upper and lower surfaces of the burner body (2a), but the combustion flame lifts upward when a combustion failure occurs. The upper air rectifying plate (6a) may be provided only on the upper surface.

(10) ... Heating chamber
(12a) ... Exhaust port
(20) ... combustion chamber
(2) ・ ・ ・ ・ ・ ・ ・ ・ ・ Oven burner
(21) ... Air inlet
(22) ... upper plate
(22a) ... outer plate
(22b) ・ ・ ・ ・ ・ ・ ・ ・ Inner plate
(2a) ... Burner body
(2c) ...
(25) ... Gas supply port
(26) ...
(200) ・ ・ ・ ・ ・ ・ ・ ・ Air flow path
(31) ・ ・ ・ ・ ・ ・ ・ ・ ・ Circulating fan
(6a) (6b) ...
(60a) (60b) ...
(61a) (61b) ・ ・ ・ ・ ・ ・ Upper and lower flange pieces

Claims (5)

A combustion chamber provided with an oven burner and provided with an air supply port for taking in external air in front of the oven burner;
A heating chamber that is placed in communication with the combustion chamber above the combustion chamber and that accommodates the food;
A circulation fan that takes in external air into the combustion chamber and sends hot air generated in the oven burner into the heating chamber for circulation.
The oven burner is a heating cooker including a flat burner body in which a number of flame hole groups open toward the downstream side of the air flow path in the left-right direction of the combustion chamber,
In the vicinity of the gas supply port of the burner main body, a bulging portion that communicates with the gas supply port and bulges in the vertical direction is formed.
A horizontally-long rectangular upright piece extending upward along the flame hole group on the upper surface side of the burner body and upstream of the air channel from the flame hole group, and air flow from the upper end side of the upper standing piece An upper air rectifying plate integrally formed with the upper flange piece extending upstream of the road is provided;
The upper flange piece is a cooking device provided above the upper surface of the bulging portion that bulges upward and at a position lower than the upper plate of the combustion chamber. A combustion chamber provided with an oven burner and provided with an air supply port for taking in external air in front of the oven burner;
A heating chamber that is placed in communication with the combustion chamber above the combustion chamber and that accommodates the food;
A circulation fan that takes in external air into the combustion chamber and sends hot air generated in the oven burner into the heating chamber for circulation.
The oven burner is a heating cooker including a flat burner body in which a number of flame hole groups open toward the downstream side of the air flow path in the left-right direction of the combustion chamber,
In the vicinity of the gas supply port of the burner main body, a bulging portion that communicates with the gas supply port and bulges in the vertical direction is formed.
A horizontally elongated lower standing piece extending downward along the flame hole group on the lower surface side of the burner body and upstream of the air flow path from the flame hole group, and an air flow from the lower end side of the lower standing piece A lower air rectifying plate integrally formed with a lower flange piece extending upstream of the road is provided;
The lower flange piece is a heating cooker provided below the lower surface of the bulging portion that bulges downward and higher than the lower plate of the combustion chamber. The heating cooker according to claim 1, wherein
A horizontally elongated lower standing piece extending downward along the flame hole group on the lower surface side of the burner body and upstream of the air flow path from the flame hole group, and an air flow from the lower end side of the lower standing piece A lower air rectifying plate integrally formed with a lower flange piece extending upstream of the road is provided;
The lower flange piece is a heating cooker provided below the lower surface of the bulging portion that bulges downward and higher than the lower plate of the combustion chamber. The cooking device according to claim 3,
A cooking device configured such that a distance between the upper flange piece and the upper plate of the combustion chamber is substantially the same as a distance between the lower flange piece and the lower plate of the combustion chamber. In the heating cooker according to claim 3 or claim 4,
A gap portion serving as an air flow path is provided between at least one end portion in the left-right direction of the upper air rectifying plate and / or at least one end portion in the left-right direction of the lower air rectifying plate and the side plate of the combustion chamber. Heating cooker.

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