JP5964340B2 - Cooker - Google Patents

Description

  The present invention relates to a cooking device that heats and cooks an object to be cooked by circulating hot air in a heating chamber.

  Conventionally, as a hot-air circulation type cooking device, for example, as shown in FIG. 8, it is incorporated under a countertop (10) of a system kitchen and burns gas by a gas burner (43) to generate combustion exhaust gas. A heating chamber (4a) that is formed above the combustion chamber (4b), communicates with the combustion chamber (4b), and accommodates an object to be cooked; and disposed behind the heating chamber (4a). A heating cooker having a circulating fan (40) is proposed.

  In this heating cooker, the circulation fan (40) drives the combustion exhaust gas generated by the gas burner (43) of the combustion chamber (4b), and the distribution plate (46) constituting the rear wall of the heating chamber (4a). ) To be heated into the heating chamber (4a) and circulated in the heating chamber (4a) to quickly spread hot air throughout the heating chamber (4a) and indirectly cook the food to be cooked. It is like that. Therefore, unlike the case where a heating means such as a gas burner is provided in the heating chamber (4a) and the food to be cooked is directly cooked, no protrusion is provided in the heating chamber (4a). (4a) can be easily maintained.

JP2013-217630A

  By the way, in general, the heating chamber (4a) incorporated in the heating cooker is a substantially rectangular box shape with a door (42) that can be opened and closed in front, and has an upper wall, a lower wall, and left and right side walls, respectively. The metal plates are joined by welding, etc., and the rear opening end is closed by the distribution plate (46) that becomes the rear wall, so each boundary portion between the upper and lower walls and the left and right side walls, and the upper and lower walls and the left and right Each boundary portion between the wall and the distribution plate (46) is formed to be angular. When cooking the food to be cooked by circulating hot air in the heating chamber (4a), oil or water vapor generated from the food to be cooked circulates in the heating chamber (4a) by hot air, so oil or the like adheres to a wide area. Also, dirt accumulates on such an angular boundary portion. Therefore, there is a problem that dirt is difficult to remove. In particular, the built-in type cooking device is severely limited in space, so that the heating chamber (4a) has a narrow space with no vertical dimension. For this reason, with the hand inserted in the heating chamber (4a), the inside of the heating chamber (4a) is difficult to see from the outside, and adheres to the dirt and the distribution plate (46) collected in the angular boundary. It is difficult to wipe off the dirt.

  In order to form the boundary part between the upper and lower walls and the left and right side walls, and the boundary part between the upper and lower walls and the left and right side walls and the distribution plate (46) in a circular arc shape, a single metal plate is deep drawn to form all the constituent walls. Although it is conceivable to form a pair, the apparatus becomes large and the cost is high. In order to suppress the adhesion of dirt such as oil, it is preferable to apply water repellent treatment such as fluororesin processing or silicon resin processing to the inner surface of the constituent wall of the heating chamber (4a), but cooking is performed by circulating hot air. In the case of cooking an object, hot air of about 300 ° C. must be sent into the heating chamber (4a) in order to burn the object to be cooked firmly. For this reason, the distribution plate (46) constituting the rear wall of the heating chamber (4a) for blowing hot air is exposed to a higher temperature (about 350 ° C.) than the other constituent walls, and the above water-repellent treatment causes thermal deterioration. Arise. Therefore, it is necessary to form at least the distribution plate (46) from a member different from other constituent walls and to perform a high heat-resistant surface treatment such as a catalyst coating treatment or a soot treatment.

  Furthermore, when using the distribution plate (46) subjected to the surface treatment with high heat resistance as described above, the upper and lower walls and the left and right side walls and the distribution plate (46) cannot be joined by welding. It is necessary to fasten the rear ends of the left and right side walls and the front end of the distribution plate (46) with fastening means such as screws, but when such fastening means are used, the fastening portion is located outside the heating chamber (4a). It protrudes and interferes with the lower combustion chamber (4b) and the upper stove. As a result, there is a problem that the heating chamber (4a) must be made smaller by the size of the fastening portion, and the internal volume of the heating chamber (4a) is reduced.

  The present invention has been made in view of the above problems, and in a heating cooker that heats and cooks an object to be cooked by circulating hot air in the heating chamber, the cleanability of the heating chamber is reduced without reducing the size of the heating chamber. It aims at improving.

In order to achieve the above-mentioned object, the present invention provides a heating cooker comprising a heating chamber that accommodates an object to be cooked, a combustion chamber that generates hot air, and a circulation fan that feeds and circulates the hot air in the combustion chamber into the heating chamber. A vessel,
The heating chamber is connected to a cylindrical main body portion including an upper wall, a lower wall, left and right side walls, and a rear frame continuous to the rear, and a front opening end of the main body portion, and a door can be opened and closed forward. A front frame to be attached; a distribution plate connected to a rear opening end of the rear frame and constituting a rear wall formed with a blowout port and a suction port for circulating hot air in the heating chamber;
The upper and lower walls and the left and right side walls are each continuous through a corner R portion, and the rear frame is formed in a tapered cylindrical shape whose opening cross-sectional area decreases toward the distribution plate,
A peripheral wall is provided through a corner R portion from the periphery of the distribution plate toward the rear opening end of the rear frame.

A boundary portion between the upper and lower walls and the left and right side walls constituting the heating chamber is a corner R portion, and an angular portion is not formed. Further, the rear frame is formed in a tapered cylindrical shape so that the opening cross-sectional area becomes smaller toward the distribution plate, and a peripheral wall is provided around the distribution plate via a corner R portion. An angular portion is not formed in the boundary portion at the rear of the chamber. Thereby, even if dirt, such as oil, adheres to the wide range in a heating chamber by circulating hot air, it can remove easily.
In addition, hot air is blown out from the distribution plate constituting the rear wall into the heating chamber, but the peripheral wall of the rear frame is formed in a tapered shape in which the opening cross-sectional area widens toward the heating chamber. Hot air spreads in the direction, and the heating chamber can be effectively heated.
Furthermore, since the main body portion and the distribution plate are formed of different members, different surface treatments can be applied to the main body portion and the distribution plate.
And since the rear frame is formed in a tapered cylindrical shape whose opening cross-sectional area becomes smaller toward the distribution plate, the peripheral wall of the rear frame is inward of the upper and lower front walls and the outer surfaces of the left and right side walls in front view. A predetermined space is formed around the rear opening of the rear frame. This space can be used as a distribution plate connection space, and it is not necessary to secure a separate space for connecting the distribution plate. Therefore, the main body and the distribution plate can be connected without reducing the size of the heating chamber. it can.

In the heating cooker, preferably,
At the rear opening end of the rear frame, a front flange piece is formed so as to project outward,
At the front end of the peripheral wall of the distribution plate, a rear flange piece for fastening with the front flange piece is formed so as to project outward,
Both the projecting end edges of the front and rear flange pieces are provided so as to be located inward of the outer surfaces of the upper wall, the lower wall, and the left and right side walls of the main body part in a front view.

  According to the heating cooker, the front and rear flange pieces projecting outward are provided at the rear opening end of the rear frame and the front end of the distribution plate. Since it is provided so as to be located inward from the outer surface of the upper wall, the lower wall, and the left and right side walls of the main body in front view, when the rear frame and the distribution plate are fastened with the front and rear flange pieces, The fastening portion does not protrude from the top / bottom / left / right direction of the heating chamber. Thereby, a main-body part and a distribution board can be connected, ensuring the height and width of a heating chamber to the maximum.

In the heating cooker, preferably,
Water repellent treatment is applied to the inner surfaces of the upper wall, the lower wall, and the left and right side walls, and the inner surface of the rear frame,
The front surface of the distribution plate is subjected to a catalyst coating treatment or wrinkle treatment that has higher heat resistance than the water repellent treatment.
According to the above cooking device, the upper and lower walls, the left and right side walls, and the inner surface of the rear frame of the heating chamber are subjected to water repellent treatment, and can be easily removed even if dirt such as oil adheres. In addition, since the distribution plate in which the hot air outlet and the suction port are formed is subjected to highly heat-resistant catalyst coating treatment and soot treatment, thermal deterioration of the surface treatment due to high-temperature hot air can be suppressed.

In the heating cooker, preferably,
The main body has an upper cover part that constitutes the upper wall of the upper wall and the left and right side walls, and a lower cover part that constitutes the lower wall of the lower wall and the left and right side walls.
According to the above cooking device, the upper cover part and the lower cover part are formed by bending the metal plate into a substantially U shape that opens downward or upward, and these are stacked in a hollow state, If the side walls are connected to each other, a cylindrical body having corner R portions at the four corners can be formed, and if the rear frame is continued to the rear thereof, the main body portion is completed.

In the heating cooker, preferably,
On the left and right lower side walls of the lower cover part, there are formed throttle grooves that open to both sides and extend in the front-rear direction,
The left and right upper side walls of the upper cover part are superimposed on the left and right lower side walls of the lower cover part so as to close the throttle groove,
A screw hole is formed at a position corresponding to the throttle groove on the upper and lower side walls of the upper cover portion.
According to the cooking device, when attaching a heat shield plate, a roller fixing plate of a door opening / closing mechanism, etc. to both sides of the main body, the upper and lower left and right side walls of the upper cover portion are utilized using the screw holes. Can be screwed on. The screw protruding to the back side of the upper side wall of the upper cover part is accommodated in the throttle groove of the lower cover part.

As described above, according to the heating cooker of the present invention, since the angular portion is not formed at the boundary portion of each component wall of the heating chamber, it is possible to easily remove dirt on the inner surface when cleaning the heating chamber. Can do. It becomes possible to maintain the heating chamber beautifully and hygienically for a long time by making the heating chamber after cooking easy.
Moreover, since the space formed around the rear opening end of the rear frame can be used as a space for connecting the distribution plate by forming the rear frame in a tapered cylindrical shape, the distribution plate is a separate member from the main body. However, it is not necessary to secure a space for connecting the distribution plate to the rear frame, for example, a space for projecting the front and rear flange pieces for screwing around the heating chamber. Therefore, it is not necessary to reduce the size of the heating chamber.
Thus, since the reduction in the size of the heating chamber can be suppressed, even a built-in heating cooker with severe space restrictions can secure a heating chamber with as large an internal volume as possible.

Moreover, since the hot air generated in the combustion chamber flows along the tapered peripheral wall of the rear frame from the outlet formed in the distribution plate, the circulation of the hot air in the heating chamber is improved and the heating chamber is efficiently heated. In addition, the heat distribution in the heating chamber can be kept uniform. Thereby, hot air can be quickly spread throughout the heating chamber, and it becomes possible to obtain a cooked object with less baking unevenness and good baking.
In addition, the water repellent treatment is applied to the inner surface of the main body portion composed of the upper and lower walls, the left and right sidewalls, and the rear frame, and the distribution plate can be subjected to a high heat resistance surface treatment by a catalyst coating treatment or the like. In particular, the distribution plate heated to a high temperature can also improve the cleaning property while suppressing thermal deterioration.
In addition, when the heat insulating plate and the roller fixing plate of the door opening / closing mechanism are screwed to the both side walls of the main body, a screw groove is provided in the lower cover where a screw groove for accommodating the screw tip is provided. Since the screw does not protrude into the heating chamber, the cleaning performance is further improved without the screw interfering with cleaning, and there is no inconvenience that the screw jumps into the heating chamber during the cleaning operation.

It is a schematic cross-sectional perspective view which shows the whole gas stove as a heating cooker which concerns on embodiment of this invention. It is a schematic perspective view which shows the whole gas stove as a heating cooker which concerns on embodiment of this invention. It is a schematic exploded perspective view of the heating chamber unit, the combustion chamber unit, and the circulation fan unit of the heating cooker according to the embodiment of the present invention. It is a general | schematic disassembled perspective view of the heating chamber unit of the heating cooker which concerns on embodiment of this invention. It is a schematic back perspective view before attaching the distribution board of the heating chamber unit of the heating cooker which concerns on embodiment of this invention. It is a schematic perspective view which shows the state which attached the distribution board to the rear frame of the heating chamber unit of the heating cooker which concerns on embodiment of this invention. It is a principal part expanded sectional view of the heating chamber of the heating cooker which concerns on embodiment of this invention. It is a schematic cross-sectional perspective view which shows the conventional heating cooker.

  Hereinafter, an embodiment of a heating cooker according to the present invention will be described with reference to the accompanying drawings. FIG. 1 shows a schematic cross-sectional perspective view of a gas stove (1) equipped with a grill / oven device (2) as an embodiment of the heating cooker of the present invention, and FIG. 2 shows a schematic overall perspective view of the gas stove (1). Indicates.

The gas stove (1) is a built-in type in which the stove body (11) is assembled in a state of being dropped into the opening of the countertop (10) of the system kitchen.
As shown in FIG. 2, the gas stove (1) includes three stove burners (12) and a grill / oven device (2), and the grill / oven device (2) is incorporated in the stove main body (11).

  The gas stove (1) is provided with a rectangular top plate (13) so as to cover the upper open portion of the stove body (11), and the stove burner (12) is exposed on the top surface of the top plate (13). At the same time, five virtues (14) supporting cooking utensils such as a pan and a frying pan are placed around each conoburner (12).

  The stove body (11) is formed in a rectangular box shape that opens upward, and the front of the stove body (11) is provided with a door (31) of the grill / oven device (2), and each stove burner ( 12) and an operation panel (15) for performing point-extinguishing and heating power adjustment of the gas burner (56) in the grill / oven device (2), setting of each mode, and the like.

As shown in FIGS. 1 and 3, the grill / oven device (2) incorporated in the gas stove (1) is located below the countertop (10) and has a heating chamber (3) for containing the food to be cooked. A heating chamber unit (30), a combustion fan unit (50) provided below the heating chamber unit (30), a combustion chamber unit (50) including the combustion chamber (5), and a circulation fan provided behind the heating chamber unit (30). And a circulation fan unit (70) having (72).
As will be described later, the heating chamber unit (30), the combustion chamber unit (50), and the circulation fan unit (70) can be detached from the stove body (11) in units.

  In this specification, the direction in which the door (31) side and the back side attached to the heating chamber (3) face each other is the front-rear direction, the width direction of the heating chamber (3) is the left-right direction, and the height of the heating chamber (3) is The vertical direction is the vertical direction.

  As shown in FIG. 2, the heating chamber (3) is horizontally long on the left side of the stove body (11), and is opened in the heating chamber (3) by opening and closing the front door (31). You can put things in and out. In the heating chamber (3), as shown in FIG. 1, an oven dish (32) for oven cooking and a grill dish for grill cooking (not shown) can be arranged.

As shown in FIGS. 3 to 5, the heating chamber (3) includes an upper cover portion (21) that constitutes an upper wall (33) and left and right upper side walls (35 a), a lower wall (34), and The upper cover (33) of the heating chamber (3) is combined with the lower cover part (22) constituting the left and right lower side walls (35b) so that the upper side wall (35a) overlaps the outer surface of the lower side wall (35b). A lower wall (34) and left and right side walls (35) are formed.
These upper and lower cover portions (21) and (22) are each formed by bending a single metal plate, so that the boundary between the upper and lower walls (33) and (34) and the left and right upper and lower side walls (35a) and (35b) A corner R portion having an arcuate cross section is formed at (20a). In particular, in this embodiment, a corner R portion of R20 is formed.
Further, as shown in FIG. 4, the left and right lower side walls (35b) of the lower cover portion (22) are formed with a narrowed groove (23) that opens to the side and is long in the front-rear direction. The portion protruding inward of (23) functions as a locking shelf (25) for locking the oven plate (23) in the heating chamber (3), as shown in FIG.
In the state where the upper cover portion (21) is overlapped with the lower cover portion (22), the left and right upper side walls (35a) of the upper cover portion (21) corresponding to the throttle groove (23) have a plurality of A screw hole (24) is formed.

  As shown in FIGS. 4 and 5, a substantially rectangular front frame (37) is formed so that no gap is formed at the front end of the cylindrical body constituted by the upper cover portion (21) and the lower cover portion (22). Are connected by welding, and a rear frame (38) formed into a short cylindrical shape by drawing is connected to the rear end by welding. Further, similarly, a distribution plate (36) formed in a shallow dish shape by drawing is fastened to the rear end of the rear frame (38), and the distribution plate (36) is attached to the rear wall of the heating chamber (3). Configure.

As for the assembly order, first, the lower cover portion (22) and the front frame (37) are integrated by welding, and then the upper cover portion (21) is integrated by welding to the front frame (37). As a result, the front frame (37) is fixed to the front opening end of the substantially rectangular cylinder composed of the upper and lower cover parts (21) (22), and the throttle groove (23) of the lower cover part (22) By closing the left and right upper side walls (35a) of the cover portion (21), the throttle groove (23) is positioned on the back side of the formation area of the screw hole (24) as shown in FIG. Become.
Thereafter, the rear frame (38) is fitted outside the upper and lower cover portions (21) and (22) and welded.
The upper and lower cover parts (21) and (22) and the rear frame (38) constitute a main body part (20), and the entire inner surface of the main body part (20) has heat-resistant repellent properties such as fluororesin processing and silicon resin processing. A water coat is applied by spraying or the like to perform surface treatment.

  The rear frame (38) has four corners in which a corner R portion having an arcuate cross section is formed, and the rear to which the distribution plate (36) is fastened from the front frame portion that is fitted around the rear opening end of the main body portion (20). It is a short cylindrical body having a tapered peripheral wall formed so that the diameter of the corner R portion is reduced toward the end and the opening cross-sectional area is reduced. Thus, the rear flange piece (28) for screwing projects obliquely rearward outward in the vertical and horizontal directions. The distribution plate (36) is fastened to the rear end of the rear frame (38).

  As shown in FIGS. 4 and 6, the distribution plate (36) has a plurality of suction ports (36 b) for taking in hot air in the heating chamber (3) at the center, and on the left and right sides thereof, A substantially rectangular plate (360) in which a large number of air outlets (36a) for feeding hot air into the heating chamber (3) are formed, and a corner R portion having a circular arc section from the periphery of the substantially rectangular plate (360). And a tapered peripheral wall (361) that spreads outward toward the rear end of the rear frame (38). Further, on each side of the front end of the peripheral wall (361), a front flange piece (26) for screwing projects obliquely rearward outward in the vertical and horizontal directions. The distribution plate (36) is subjected to a highly heat-resistant catalyst coating treatment or soot treatment that can withstand the heating of the combustion exhaust gas generated in the combustion chamber (5) with hot air.

  Then, as shown in FIG. 6, in a state where the front surface of the front flange piece (26) of the distribution plate (36) is overlapped with the rear surface of the rear flange piece (28) of the rear frame (38), both of them are screwed. Stop and fasten. As a result, the heating chamber (3) that is substantially rectangular box-shaped and opens forward is assembled. At this time, the projecting edges of the front and rear flange pieces (26), (28) are, as viewed from the front, the upper wall (33), the lower wall ( 34) and a dimensional relationship that does not protrude outward from the outer surfaces of the left and right side walls (35). Therefore, there is no need to provide extra space for screwing in the up / down / left / right direction of the heating chamber (3). Therefore, the height of the main body portion (20) formed by combining the upper and lower cover portions (21) and (22) while preventing interference between the fastening portion and the upper burner (12) and the lower combustion unit (5). Can be ensured to the maximum.

  As shown in FIG. 3, on the outer surface of the main body (20), there is a heat shield (45) and a roller fixing plate (4) of an opening / closing mechanism (44) for opening and closing the door (31). As shown in FIGS. 5 and 7, the screws (27) for attaching these screws are inserted while being screwed into the screw holes (24) provided in the upper side wall (35a) of the upper cover portion (21). Is done. Since the screw tip of the screw (27) screwed and connected to these screw holes (24) protrudes into the throttle groove (23) and does not protrude into the main body (20) constituting the heating chamber (3), When cleaning the inside of the heating chamber (3), the screw tip does not get in the way, the cleaning performance is improved, and there is no inconvenience of catching a hand on the screw tip during cleaning.

  In addition, as shown in FIG. 1, on the rear side of the upper wall (33) of the heating chamber (3), an exhaust port (62) is provided via an exhaust passage (61) formed above the upper wall (33). A number of communicating exhaust holes (33a) are formed. An upper heat shield (63) is provided so as to cover the exhaust passage (61) and the upper wall (33) of the heating chamber.

  1 and 3, the circulation fan unit (70) disposed behind the heating chamber unit (30) includes a hot air passage (71), a circulation fan (72), and a circulation fan ( 72), a motor (74) that drives the circulation fan (72), a cooling fan (75) that cools the motor (74), and a fan that houses the cooling fan (75) The case (76), the motor case (77) for housing the motor (74), the cooling passage (78), the bottom case (79a) and the rear case (79b) covering the hot air passage (71) and the circulation passage (73) ).

The hot air passage (71) communicates with the combustion chamber (5) and is a passage for sending hot air of the combustion exhaust gas generated in the combustion chamber (5) to the heating chamber (3) through the circulation passage (73). . The hot air passage (71) communicates with the suction port (36b) of the distribution plate (36) on the front side.
As shown in FIG. 3, the circulation passage (73) formed behind the hot air passage (71) is formed in a U shape so as to surround the hot air passage (71) in the horizontal direction. The circulation passage (73) has a circulation fan (72) disposed in the central portion communicating with the hot air passage (71) and faces the rear opening (71b) of the hot air passage (71). 73a) is formed. The rectangular openings (73b) at both ends of the U-shape of the circulation passage (73) are communicated with the heating chamber (3) so as to face the air outlet (36a) of the distribution plate (36).

  The circulation fan (72) is fixed to the tip of the rotating shaft of the motor (74) located at the rear.When the circulation fan (72) is driven to rotate, a suction port (36b formed in the distribution plate (36) is formed. The hot air in the heating chamber (3) and the hot air generated in the lower combustion chamber (5) are sucked into the circulation passage (73) through the hot air passage (71), and the distribution plate ( It is sent out into the heating chamber (3) from the outlets (36a) formed on the left and right sides of 36).

  A cooling fan (75) is disposed between the circulation fan (72) and the motor (74). The cooling fan (75) is fixed to an intermediate portion in the axial direction of the rotating shaft of the motor (74). The cooling fan (75) is housed in a fan case (76) that divides the circulation passage (73) and the exhaust passage (61). The fan case (76) communicates with a cooling passage (78) formed above the motor case (77). The downstream end of the cooling passage (78) faces the exhaust port (62).

  As shown in FIGS. 1 and 6, the motor case (77) in which the motor (74) is housed has an air intake port (77a) for taking external air into the motor case (77) at the rear. ing. When the cooling fan (75) is driven to rotate, external air is taken into the motor case (77) through the air intake port (77a) and the motor (74) is cooled, and then sucked into the fan case (76). Thus, the cooling passage (78) is forcibly discharged to the outside.

  In the gas stove according to the present embodiment, the hot air of the combustion exhaust gas generated in the combustion chamber (5) is sent to the hot air passage (71) by the driving of the circulation fan (72), and the circulation fan (72) is further provided. Hot air is blown out into the heating chamber (3) from the outlets (36a) formed on the left and right sides of the distribution plate (36) through the passage (73).

  Also, the hot air in the heating chamber (3) is circulated through the hot air passage (71) from the suction port (36b) provided in the distribution plate (36) of the heating chamber (3) by driving the circulation fan (72). It is sucked into the passage (73). At this time, since hot air is sucked from the combustion chamber (5) through the hot air passage (71) into the circulation passage (73), the hot air sucked from the heating chamber (3) is drawn from the combustion chamber (5). It is reheated with hot air and blown into the heating chamber (3) from the outlet (36a) of the distribution plate (36) provided on the left and right of the circulation fan (72), and the hot air is circulated.

  Thus, during cooking, the hot air sucked into the circulation passage (73) from the combustion chamber (5) by the circulation fan (72) and the hot air in the heating chamber (3) are mixed, and again the heating chamber. (3) Circulation of hot air discharged into the interior is performed. By circulating hot air, the temperature in the heating chamber (3) can be rapidly increased, and the temperature in the heating chamber (3) can be made uniform efficiently, and can be accommodated in the heating chamber (3). Cooked food such as fish and meat can be cooked.

  Also, during cooking of the food to be cooked, dirt such as oil and juice scatters from the food to be cooked, and the four corners and distribution plates (36) of the main body part (20) constituting the heating chamber (3) by the circulating hot air Even if it adheres to the four corners, the boundary portion of each component wall is formed by a corner R portion having a circular arc cross section, and the corner of the rear frame (38) is reduced in diameter toward the distribution plate (36). It is formed in a short cylindrical body with a tapered peripheral wall so that the opening cross-sectional area is small, and furthermore, a heat-resistant water-repellent coat is surface-treated on these inner surfaces, so that attached dirt is easy Can be wiped off. Thereby, the cleaning property in the heating chamber (3) is improved, and the inside can be kept hygienic for a long time.

  Further, the peripheral wall (361) of the distribution plate (36) and the peripheral wall of the rear frame (38) through which hot air is blown out through the distribution plate (36) have an opening cross-sectional area that increases toward the inside of the heating chamber (3). Therefore, hot air spreads in the vertical and horizontal directions in the heating chamber (3), and the heating chamber (3) can be effectively heated. Thereby, a to-be-cooked item can be heated efficiently, and a to-be-cooked item with little baking unevenness can be baked deliciously.

  Further, since the distribution plate (36) is provided separately from the rear frame (38), it is possible to perform different surface treatments on the rear frame (38) and the distribution plate (36), for example, the distribution plate. Only (36) can be subjected to catalyst coating treatment and soot treatment having higher heat resistance than water repellent treatment. Thereby, cleaning property can be improved, suppressing the thermal deterioration of the surface treatment of the front surface of the distribution plate (36).

  And in order to fasten the distribution plate (36) and the rear frame (38) by screwing, the front and rear flange pieces (26) (26) ( 28), the peripheral wall of the rear frame (38) is tapered so that the opening cross-sectional area decreases toward the distribution plate (36), and the front and rear flange pieces (26) ( Both protruding edges of 28) are provided so as to be located inward of the outer surfaces of the upper wall (33), the lower wall (34) and the left and right side walls (35) of the main body (20) in a front view. Therefore, when the rear frame (38) and the distribution plate (36) are fastened by the front and rear flange pieces (26) (28), the fastening portion is provided so as not to protrude from the vertical and horizontal directions of the heating chamber (3). be able to. As a result, even a built-in heating cooker with severe space restrictions can secure a heating chamber with as large an internal volume as possible.

In the above embodiment, the main body portion (20) is formed of the upper cover portion (21) and the lower cover portion (22), but the upper wall (33), the lower wall (34), and the left and right side walls (35). As long as the corner R portion can be formed at the boundary portion (20a), a body portion integrally formed with these may be used, or a further divided body portion may be used.
Further, in the above embodiment, the convection type heating cooker that circulates the hot air generated by burning the gas by the gas burner (56) in the heating chamber is described, but together with the function of circulating the hot air, the upper wall of the heating chamber In addition, the present invention can be applied to a convection type heating cooker provided with a grill portion for directly heating an object to be cooked by separately arranging an electric heater or a gas burner.
In the above embodiment, a gas burner is used as the heat generating portion, but an electric heater can also be used.

(20) ・ ・ ・ ・ ・ Main body
(20a) ・ ・ ・ ・ Boundary part
(3) ... heating room
(31) ・ ・ ・ ・ ・ Door
(33) ・ ・ ・ ・ ・ Upper wall
(34): Lower wall
(35) ・ ・ ・ ・ ・ Sidewall
(36) ・ ・ ・ ・ ・ Distribution plate
(36a) ・ ・ ・ ・ Air outlet
(36b) ・ ・ ・ ・ Suction port
(37) ・ ・ ・ ・ ・ Front frame
(38) ・ ・ ・ ・ ・ Rear frame
(5) ... combustion chamber
(72) ・ ・ ・ ・ ・ Circulating fan
(361) ・ ・ ・ ・ Surrounding wall

Claims (5)

A heating cooker comprising a heating chamber for storing an object to be cooked, a combustion chamber for generating hot air, and a circulation fan for sending and circulating the hot air in the combustion chamber into the heating chamber,
The heating chamber is connected to a cylindrical main body portion including an upper wall, a lower wall, left and right side walls, and a rear frame continuous to the rear, and a front opening end of the main body portion, and a door can be opened and closed forward. A front frame to be attached; a distribution plate connected to a rear opening end of the rear frame and constituting a rear wall formed with a blowout port and a suction port for circulating hot air in the heating chamber;
The upper and lower walls and the left and right side walls are each continuous through a corner R portion, and the rear frame is formed in a tapered cylindrical shape whose opening cross-sectional area decreases toward the distribution plate,
A cooking device in which a peripheral wall is provided through a corner R portion from the periphery of the distribution plate toward the rear opening end of the rear frame. The heating cooker according to claim 1, wherein
At the rear opening end of the rear frame, a front flange piece is formed so as to project outward,
At the front end of the peripheral wall of the distribution plate, a rear flange piece for fastening with the front flange piece is formed so as to project outward,
The both ends of the said front-and-back flange piece are heating cookers provided so that it may be located inward rather than the outer surface of the upper wall of the said main-body part, a lower wall, and a right-and-left side wall by front view. In the heating cooker according to claim 1 or 2,
Water repellent treatment is applied to the inner surfaces of the upper wall, the lower wall, and the left and right side walls, and the inner surface of the rear frame,
A cooking device in which a front surface of the distribution plate is subjected to a catalyst coating process or a wrinkle process having a higher heat resistance than the water repellent process. The cooking device according to any one of claims 1 to 3,
The said main-body part is a heating cooker which has the upper cover part which comprises the upper wall of an upper wall and a left-right side wall, and the lower cover part which comprises the lower wall and the lower side wall of a right-and-left side wall. The cooking device according to claim 4, wherein
On the left and right lower side walls of the lower cover part, there are formed throttle grooves that open to both sides and extend in the front-rear direction,
The left and right upper side walls of the upper cover part are superimposed on the left and right lower side walls of the lower cover part so as to close the throttle groove,
A cooking device in which a screw hole is formed at a location corresponding to the throttle groove in the left and right upper side walls of the upper cover portion.

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