JP5651640B2 - Cooker - Google Patents

Description

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

  In recent years, convection type ovens using hot air circulation have been widely used to bake cooked objects such as fish and meat, and heating cookers with oven cabinets have also been proposed.

  This type of heating cooker has, for example, an oven chamber provided with a combustion chamber in which gas is burned by an oven burner to generate combustion exhaust gas, and a heating chamber that communicates with the combustion chamber and accommodates an object to be cooked. The cooking exhaust gas generated in the combustion chamber is heated by the circulation fan from the hot air blowing section provided on the rear wall of the heating chamber as hot air and circulated in the heating chamber to indirectly cook the object to be cooked. It has a configuration.

  In oven cooking using such a heating cooker, compared to grill cooking where the food to be cooked is directly heated with a gas burner or an electric heater, uneven cooking is less likely to occur in the food to be cooked, and the inside of the food to be cooked is uniform. It can be baked. In addition, by circulating hot air, heat can be quickly distributed throughout the heating chamber, so that cooking in a short time is possible.

  By the way, in said heating cooker, what performed the surface treatment process by heat-resistant surface treatment materials, such as a silicon-type resin and a fluorine-type resin, to the inner surface of the structural wall of a heating chamber is known (patent document 1 and a patent). Reference 2). If surface treatment processing is performed with such a surface treatment material having excellent cleaning properties, dirt such as oil scattered from an object to be cooked can be prevented from sticking to the inner surface of the constituent wall, and can be easily removed even if dirt is attached. Therefore, the heating chamber can be easily cleaned and maintained.

  However, in the hot air circulation type oven cooking as described above, the cooking object is less likely to be scorched as compared to the direct heating type grill cooking, and in order to perform high temperature cooking that firmly burns the cooking object, 280 Hot air at a high temperature of about -30 ° C must be sent into the heating chamber.

  When performing such high-temperature oven cooking, higher-temperature combustion exhaust gas is generated in the combustion chamber, so hot air that is hotter than hot air circulated from the heating chamber is sent into the heating chamber from the hot-air blowing section. Therefore, the temperature in the vicinity of the hot air blowing portion exposed to the high-temperature hot air becomes higher (about 350 ° C.) than the other wall surface temperature of the heating chamber. Therefore, if the hot air blowing part provided on the rear wall of the heating chamber is subjected to surface treatment such as silicon resin or fluorine resin as described above, the heat resistance temperature of these resins is the temperature near the hot air blowing part. Therefore, when exposed to hot air of high temperature of about 350 ° C., there is a problem that damage such as peeling occurs in the surface treatment of the portion due to thermal deterioration.

Japanese Patent No. 3304249 Japanese Patent No. 3604540

  The present invention has been made in view of the above problems, and its object is to provide a soil removal function for surface treatment using a surface treatment material applied to the inner surface of a constituent wall constituting a heating chamber of an oven cabinet. An object of the present invention is to provide a heating cooker that can suppress damage near the hot air blowing portion even if hot air having a temperature equal to or higher than the heat resistance temperature of the surface treatment material is sent to the heating chamber for high temperature oven cooking without deterioration.

The present invention taken to achieve the above object
Heating means for generating hot air;
A heating chamber in which the object to be cooked is heated by circulating the hot air generated by the heating means as hot air blown out from the hot air blowing portion provided on the rear wall;
A circulating fan for blowing the hot air into the heating chamber and circulating the hot air into the heating chamber;
The inner surface of the constituent wall of the heating chamber is subjected to a surface treatment process with a surface treatment material excellent in cleanability over substantially the entire area excluding the hot air blowing portion provided on the rear wall,
The heat air blow-fat, together and a separate body from the said rear wall, a number of outlet holes constituting a part of the rear wall is made of the plate portion through,
Said plate portion is Ri Do or from high heat resistant material surface treatment by high heat resistant coating material with a higher heat resistance temperature than the surface treatment material to the substrate is applied, the plate portion, said rear wall to cover the blowout opening formed in a cooking device that has been removably attached to the rear wall.

  In this case, since the surface treatment processing with the surface treatment material excellent in cleanability is performed on almost the entire inner surface of the constituent wall of the heating chamber excluding the hot air blowing portion provided on the rear wall, the inner surface of the constituent wall is covered. Dirt such as oil scattered from the food is difficult to adhere, and even if it adheres, the dirt can be easily removed.

  Moreover, in this thing, the hot-air blowing part which blows off hot air in a heating chamber has a plate part which many blowing holes penetrated, and this plate part has high heat resistance which has a heat-resistant temperature higher than surface treatment material in a base material Since the surface treatment is applied by the coating material or it is made of a highly heat-resistant material, even if hot air exceeding the heat resistance temperature of the surface treatment material is blown out from the blow hole provided in the plate portion, There is little heat deterioration of the part.

  Moreover, in this thing, since a part of back wall is formed in the plate part of the hot air blowing part separate from a back wall, it can cut | disconnect heat between a plate part and a back wall. . Thereby, even if a hot hot air passes through the blowing hole of the plate portion, overheating of the rear wall can be suppressed, and thermal deterioration of the surface treatment processing of the rear wall can be suppressed.

  Moreover, since the temperature of the hot hot air that has passed through the plate portion becomes lower than the vicinity of the hot air blowing portion by the time it reaches the other constituent wall of the heating chamber, it is a surface treatment with excellent cleanability applied to the inner surface of the constituent wall. There is little heat deterioration of processing.

Further, since hot hot air is blown out from the blowout holes of the plate portion by the circulation fan, the plate portion is less likely to get dirty than the inner surface of the other constituent walls.
Further, in this case, since the plate portion is detachably attached to the rear wall of the heating chamber, the plate portion can be removed from the rear wall and easily cleaned even if dirt is attached.

  The present invention also provides:
  Heating means for generating hot air;
  A heating chamber in which the object to be cooked is heated by circulating the hot air generated by the heating means as hot air blown out from the hot air blowing portion provided on the rear wall;
  A circulating fan for blowing the hot air into the heating chamber and circulating the hot air into the heating chamber;
  The inner surface of the constituent wall of the heating chamber is subjected to a surface treatment process with a surface treatment material excellent in cleanability over substantially the entire area excluding the hot air blowing portion provided on the rear wall,
  The hot air blowing part is formed separately from the rear wall, and a plate part through which a plurality of blowing holes constituting a part of the rear wall penetrates, and a duct formed integrally with the plate part. And at least
  The plate part and the duct part are subjected to surface treatment processing with a high heat resistant coating material having a heat resistant temperature higher than that of the surface treatment material on the base material or made of a high heat resistant material,
  The plate portion is provided so as to cover a blowout opening formed in the rear wall,
  The said duct part is a heating cooker which comprises a part of circulation path for guide | inducing the hot air circulated by the said circulation fan to the blowing hole of the said plate part.

  The hot air blowing part can be composed only of the plate part, and the plate part can be attached to the rear wall, but in this case, an attachment piece or the like is required for the opening part for arranging the plate part provided on the rear wall. At the same time, it is necessary to secure an attachment location for attaching a fastening member such as a screw to the plate portion. As a result, the opening area of the blowing opening is reduced, and the area of the blowing hole of the plate portion is reduced, so that the amount of hot air to be circulated is reduced.

  However, in the cooking device described above, the plate portion constituting a part of the rear wall and the duct portion constituting a part of the circulation passage for guiding the hot air circulated by the circulation fan to the blowout hole are integrated. Since the hot air blowing portion is formed, the plate portion faces the heating chamber without fastening the rear wall and the plate portion by attaching the hot air blowing portion to another member constituting the circulation passage. The hot air blowing part can be fixed with. For this reason, not only the area of the opening part for blowing provided in a rear wall but the area of the whole blowing hole of a plate part can be enlarged. Furthermore, since it is not necessary to provide the attachment part of a fastening member in a plate part, a blowing hole can be formed in the whole surface of a plate part without bias.

In the heating cooker, preferably, the inner surface of the constituent wall of the heating chamber is subjected to a surface treatment process with a fluorine-based resin or a silicon-based resin over substantially the entire area excluding the hot air blowing portion provided on the rear wall,
The plate part and the duct part are configured by subjecting a base material to surface treatment by enamel.

  In this case, since almost the entire inner surface of the constituent wall of the heating chamber is subjected to a surface treatment with a fluorine-based resin or a silicon-based resin, the cleaning property is excellent. In addition, the plate part and duct part of the hot air blowing part are constructed by subjecting the base material to surface treatment with enamel, so that it is excellent in heat resistance, is difficult to get dirty, and easily adheres to dirt. Can be removed.

The heating cooker preferably further includes a combustion chamber in which an oven burner for generating hot air by burning gas is disposed as the heating means,
The heating chamber communicates with the combustion chamber, and hot air generated by the oven burner is circulated as hot air.

  By using an oven burner as the heating means, hot air can be generated at a higher temperature, while the hot air sent from the combustion chamber causes thermal deterioration of the surface treatment applied to the rear wall of the heating chamber. Cheap. However, in the heating cooker described above, since the plate portion and the duct portion of the hot air blowing portion have a high heat resistance temperature, such thermal deterioration can be suppressed.

  In the cooking device having the oven burner, preferably, the rear wall has a double structure in which a heat shield plate is disposed on the rear surface.

  In this case, even when high-temperature hot air is generated by the oven burner, heat from the hot air is directly received by the heat shield and the rear wall of the heating chamber is not directly heated. Can be suppressed.

  As described above, according to the present invention, when high-temperature hot air is sent to the heating chamber as hot air by the circulation fan, the inner surface of the constituent wall of the heating chamber other than the plate portion of the hot air blowing portion heated directly by the hot air is The surface treatment processing is performed with a surface treatment material that is easy to remove dirt and is easy to remove even if dirt is attached, and at least the plate part of the hot air blowing part is on the surface of the substrate. Since the surface treatment is performed by a high heat resistant coating material having a higher heat resistance temperature than the treatment material or made of the high heat resistant material, fish and meat in the heating chamber without deteriorating the cleaning property in the heating chamber. High-temperature cooking that burns dishes is possible.

  In addition, since the base part of the hot air blowing part is surface-treated with a high heat resistant coating material or made of a high heat resistant material, hot hot air is blown out from the blowing holes provided in the plate part. However, there is little thermal deterioration of the surface treatment of the plate portion. Further, since the hot air is blown out from the plate portion, the plate portion is less likely to get dirty as compared with other portions of the constituent walls of the heating chamber, and needs to be cleaned less frequently. In addition, since a part of the rear wall is formed by the plate portion of the hot air blowing portion that is separate from the rear wall, heat can be cut between the plate portion and the rear wall. As a result, heat transfer from the plate portion to the rear wall is suppressed, and damage to the surface treatment processing applied to the front surface of the rear wall in the vicinity of the plate portion can be suppressed.

  Further, in the case where the hot air blowing portion is formed by integrally forming the plate portion and the duct portion constituting a part of the circulation passage, it is necessary to provide an attachment piece for attaching the plate portion to the rear wall. In addition, since it is not necessary to secure a mounting portion such as a screw on the plate portion, not only the area of the opening for blowing provided on the rear wall but also the area of the entire blowing hole of the plate portion can be increased. Thereby, hot air can be efficiently circulated from the circulation passage into the heating chamber. Furthermore, since it is not necessary to provide the attachment part of a fastening member in a plate part, a blowing hole can be formed in the whole surface of a plate part without bias. As a result, the hot air sent from the circulation passage is prevented from spreading from the blow hole, and the hot air is blown out linearly into the heating chamber, so that the hot hot air is blown directly onto the upper wall and side walls of the heating chamber. It becomes difficult to attach, and thermal deterioration of the surface treatment applied to these can be further suppressed.

  In addition, in the case where the plate part is detachably attached to the rear wall, the plate part which is a separate part from the rear wall can be removed from the rear wall when dirt that hardly falls on the plate part occurs. Dirt can be easily removed.

  Moreover, what performed the surface treatment process by the enamel on the plate part and the duct part becomes more excellent in heat resistance, and also in the cleaning property. Moreover, surface treatment by enamel is expensive, but in the present invention, only the hot air blowing part having the plate part and the duct part needs to be surface-treated by enamel, so that an increase in manufacturing cost can be suppressed.

  In addition, when an oven burner is used as the heating means, high-temperature hot air can be generated, so that the heating chamber can be rapidly heated. And although the rear wall of a heating chamber is easy to carry out a thermal deterioration by blowing a hot hot air, such a hot deterioration can be suppressed since a hot-air blowing part has a high heat-resistant temperature.

  In addition, by arranging a heat shield on the rear surface of the rear wall to form a double structure, it is possible to suppress the temperature rise of the entire rear wall. It is possible to further prevent thermal deterioration of the processing.

It is a schematic cross-sectional perspective view which shows the heating cooker in Embodiment 1 of this invention. It is a cross-sectional principal part perspective view which shows the back part of the heating cooker in Embodiment 1 of this invention. It is a schematic perspective view which shows the hot air blowing part of the heating cooker in Embodiment 1 of this invention. It is a schematic cross-sectional perspective view which shows the heating cooker in Embodiment 2 of this invention. It is a cross-sectional principal part perspective view which shows the back part of the heating cooker in Embodiment 2 of this invention. It is a cross-sectional principal part perspective view which shows the back part of the heating cooker in other embodiment of this invention.

(Embodiment 1)
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 11 is incorporated in a state of being dropped into an opening of a countertop 10 of a system kitchen as a cooking device according to an embodiment of the present invention. The oven cabinet 3 incorporated in the gas stove is located below the counter top 10 and has a heating chamber 3a for accommodating the food to be cooked and a combustion chamber 3b provided below the heating chamber 3a. In this specification, the direction in which the door 32 side and the back side of the heating chamber 3a face each other is referred to as the front-rear direction, the width direction of the heating chamber 3a is referred to as the left-right direction, and the height direction of the heating chamber 3a is referred to as the up-down direction.

  The heating chamber 3a is provided horizontally on the left side of the stove main body 11, and by opening and closing the door 32 of the front panel, an object to be cooked can be taken in and out of the heating chamber 3a. Specifically, when the door 32 is rotated forward (front side), the tray 13 can be pulled out together with the door 32, and the grill set (not shown) set on the pulled tray 13 In addition, for example, after placing an object to be cooked such as fish, the object to be cooked is accommodated in the heating chamber 3a by returning the door 32 backward.

  The heating chamber 3a has an upper wall 33 that constitutes a ceiling portion, a lower wall 34 that partitions the lower combustion chamber 3b, left and right side walls 35, and a rear (back side) rear wall 36. The door 32 is closed so as to be openable forward. The heating chamber 3a can be opened by rotating the door 32 forward.

  In the present embodiment, the upper wall 33, the lower wall 34, the left and right side walls 35, and the rear wall 36 are configured by bending a stainless steel base material into a predetermined shape. Surface treatment with a fluorine-based resin is performed on substantially the entire inner surface of the constituent wall excluding the plate portion 22. Therefore, even if dirt such as oil scatters from the object to be cooked, it hardly adheres to the inner surface of each constituent wall, and can be easily removed even if dirt is attached.

  A large number of exhaust holes 33 a communicating with the exhaust port 50 are formed behind the upper wall 33 of the heating chamber 3 a through the exhaust passage 5 formed above the upper wall 33.

  As shown in FIGS. 1 and 2, the rear wall 36 of the heating chamber 3a is formed with a number of suction holes 31 in the center for taking in hot air in the heating chamber 3a. A blowout opening 20 is formed. Further, a heat shield plate 38 is attached to the rear surface of the rear wall 36 excluding the suction hole 31 between the left and right blowing openings 20 so as to be separated from the rear wall 36. A hot air passage 44 for circulating the hot air of the combustion exhaust gas generated in the combustion chamber 3b as hot air to the heating chamber 3a is formed behind the heat shield plate 38.

  A plate portion 22 of the hot air blowing portion 23 shown in FIG. 3 is disposed in each of the two blowing openings 20 so as to constitute a part of the rear wall 36. 3 is arranged on the left side of the rear wall 36 when viewed from the front, and as shown in FIG. 2, the right side of the rear wall 36 is symmetrical with the right side. The hot-air blowing part 23 which has the structure is provided.

  In the hot air blowing part 23 of the present embodiment, a plate part 22 facing the heating chamber 3a and a duct part 24 constituting a part of a circulation passage 61 described later are integrally formed behind the plate part 22. It is formed and has a substantially L-shaped structure in plan view.

  This will be described in more detail. The plate portion 22 is formed by expanding a metal plate so as to abut on the inner edge of the blowing opening 20 of the rear wall 36. Further, the duct portion 24 constituting a part of the circulation passage 61 on the rear side of the rear wall 36 is vertically and horizontally from the periphery of the plate portion 22 so as to face the rear surface of the rear wall 36 around the blowing opening 20. It has the board | substrate part 24a extended toward the direction, and the channel | path formation part 24b bent backward from the periphery of the board | substrate part 24a. The passage forming portion 24b linearly extends backward from the right side of the substrate portion 24a and the curved portion 24c bent in a predetermined R shape from the left side of the substrate portion 24a. A side portion 24d, an attachment piece 24e bent inward from the end portion of the side portion 24d, and an upper surface portion and a lower surface portion that connect these vertically, and an end portion of the bending portion 24c, A circulation opening 25 through which hot air flows is formed between the end of the attachment piece 24e. Further, the attachment piece 24e is formed with a screw hole 24h for fastening the hot air blowing portion 23 and a hot air passage forming member 45 described later with a screw P. Therefore, the plate portion 22 is directly fixed to the rear wall 36 by fixing the attachment piece 24e to the hot air passage forming member 45 constituting the circulation passage 61 in a state where the plate portion 22 is inserted into the blowing opening portion 20. It can fix with respect to the opening part 20 for blowing, without doing. For this reason, it is not necessary to provide an attachment piece or the like for attaching the plate portion 22 to the blowing opening 20 of the rear wall 36, and it is not necessary to provide an attachment portion for a fastening member such as a screw on the plate portion 22. Accordingly, not only the entire blowing opening 20 provided in the rear wall 36 can be used, but also the blowing hole 21 can be formed on the substantially entire surface of the plate portion 22, and the entire area of the blowing hole 21 can be increased. In addition, you may fix the hot air blowing part 23 by fastening the edge part of the curved part 24c, and the circulation fan case 60. As shown in FIG.

  The plate part 22 and the duct part 24 of this Embodiment are comprised from what performed the surface treatment process by the enamel on both front and back both surfaces of the base material made from an enamel steel plate. In manufacturing the plate part 22 and the duct part 24 before the surface treatment processing, a single metal plate may be integrally formed by bending into a predetermined shape, or a plurality of metal plates may be welded or fitted together. May be integrally formed by joining together.

  The combustion chamber 3b includes a lower wall 34 that constitutes a ceiling wall of the combustion chamber 3b, a bottom surface opposed to the lower wall 34, left and right side surfaces, and a heat shield plate attached to the rear surface of the rear wall 36. 38 and a hot air passage forming member 45 having a rear wall facing surface 45b (see FIG. 2) disposed opposite to the rear wall 38, and a gas supply pipe (not shown) is provided in the rear region in the combustion chamber 3b. An oven burner 43 to which gas is supplied is disposed. The combustion chamber 3b is configured such that combustion air is taken into the combustion chamber 3b by communicating the front with the outside. Accordingly, external combustion air and gas sucked from the front of the combustion chamber 3b are mixed and burned by the oven burner 43, whereby hot air of combustion exhaust gas is generated in the combustion chamber 3b.

  Further rearward of the arrangement position of the oven burner 43 is in communication with the hot air passage 44 surrounded by the heat shield plate 38 and the hot air passage forming member 45, and the hot air of the combustion exhaust gas generated in the combustion chamber 3b is hot air. Into the hot air passage 44.

  The hot air passage forming member 45 is in close contact with the heat shield plate 38 in such a manner as to surround the upper and left sides of the suction hole 31 from the rear wall facing surface 45b located behind the heat shield plate 38, and the lower part thereof is in the combustion chamber 3b. It is open. Furthermore, an opening 45 a for sucking hot air through the hot air passage 44 by the circulation fan 6 described later is formed at a position of the rear wall facing surface 45 b facing the suction hole 31.

  As shown in FIGS. 1 and 2, a circulation fan case 60 is disposed at the rear of the rear wall facing surface 45 b of the hot air passage forming member 45 so as to surround the hot air passage 44 behind the heating chamber 3 a. ing. The circulation fan case 60 is closed at the rear surface except for the insertion portion through which the rotation shaft of the motor 4 is inserted, and the upper end, the bottom surface, and the front end portions of both side surfaces are joined to the peripheral edge of the rear wall 36. Has been. Thus, a circulation passage 61 is formed which communicates with the hot air passage 44 through the opening 45a and communicates with the blowout holes 21 of the plate portion 22 attached to the left and right sides of the rear wall 36 of the heating chamber 3a. A circulation fan 6 for forcibly circulating hot air in the heating chamber 3a is disposed in the circulation passage 61.

  The circulation fan 6 is fixed to the tip of the rotating shaft of the motor 4 located at the rear, and at a position corresponding to the formation area of the suction hole 31 in the center of the rear wall 36 and the opening 45a of the rear wall facing surface 45b. is set up. Accordingly, when the circulation fan 6 is driven to rotate, hot air in the heating chamber 3a is sucked into the circulation passage 61 through the suction hole 31 formed in the rear wall 36 and hot air generated in the lower combustion chamber 3b. Becomes hot air and is sucked into the circulation passage 61 from the opening 45 a through the hot air passage 44. And the sucked hot air is sent out into the heating chamber 3a from the blowout holes 21 on both the left and right sides of the rear wall 36. As a result, hot air circulates in the heating chamber 3a, the temperature in the heating chamber 3a is rapidly increased, and the temperature can be made uniform efficiently, such as fish and meat accommodated in the heating chamber 3a. Can be cooked in the oven.

  A motor chamber 40 in which the motor 4 is accommodated is provided at the rear of the circulation fan case 60 constituting the circulation passage 61. As shown in FIG. A supply cylinder 42 that is open to the outside is connected, and external air can be taken in via the supply cylinder 42. In the present embodiment, the motor chamber 40 is configured from a case that covers the periphery of the motor 4, but the motor chamber may be configured by a component wall of the stove body 11.

  A cooling fan 7 is disposed between the circulation fan case 60 and the motor 4. The cooling fan 7 is fixed to an intermediate portion in the axial direction of the rotating shaft of the motor 4. Between the cooling fan 7 and the motor 4, A cooling fan case 41 having a rear surface having an opening 41a in the center for cooling the motor 4 by the rotation of the cooling fan 7 is disposed. Further, the bottom surface and both side surfaces of the cooling fan case 41 are joined and closed with the circulation fan case 60, but the upper portion of the cooling fan case 41 is opened upward to discharge the cooling air to the outside. . The rear side of the upper opening portion is connected to a passage member that extends rearward beyond the upper side of the motor chamber 40 and opens toward the exhaust port 50. As a result, a motor chamber 40 in which the motor 4 is accommodated at the upstream end and a cooling passage 8 that communicates with the exhaust port 50 at the downstream end and discharges the cooling air after cooling the motor 4 from the exhaust port 50 to the outside are formed. Is done.

  The cooling passage 8 communicates with the motor chamber 40 via the opening 41 a of the cooling fan case 41, but is separated from the circulation passage 61 by the circulation fan case 60 so as to be disconnected. The cooling air is configured not to be sent into the hot air passage 44. Thereby, the temperature fall of the hot air by cooling air is prevented.

  As described above, the exhaust passage 5 communicating with the exhaust hole 33a is formed behind the upper wall 33 constituting the ceiling portion of the heating chamber 3a, and the exhaust from the exhaust passage 5 and the cooling passage 8 are formed. From the downstream ends of the passages 5 and 8 join together and are discharged to the outside through a single exhaust port 50.

  An after burner 1 is disposed behind the exhaust passage 5 in a posture with the combustion surface facing upward. Accordingly, when the object to be cooked is accommodated in the heating chamber 3a and the circulation fan 6 is rotationally driven to forcibly circulate the hot air in the heating chamber 3a, oil smoke or odor components generated from the object to be cooked are part of the hot air. Is exhausted from the exhaust hole 33 a of the upper wall 33 to the exhaust passage 5. Then, in the exhaust passage 5, oil smoke and odor components in the exhaust are burned out by the afterburner 1, and the exhausted smoke and deodorized exhaust is discharged from the exhaust port 50.

  When oven cooking is performed using the gas stove according to the present embodiment, the heating chamber 3a is opened by rotating the door 32 forward, and a fish or net (not shown) on the tray 13 is opened from the heating chamber 3a. After placing an object to be cooked such as meat, the door 32 is returned to close the front opening of the heating chamber 3a, the power switch is turned on, and the oven cooking start switch is turned on, although not shown.

  As a result, oven cooking is started, and rotation driving of the circulation fan 6 and the cooling fan 7 is started. Subsequently, the oven burner 43 is ignited and combustion exhaust gas is generated in the combustion chamber 3b. Also, according to various oven mode switches input at the same time as the start switch, the oven cooking is continued until the afterburner 1 is ignited or the timer is set, and the time up is recognized. Bake things.

  For example, when cooking an object to be cooked such as fish, meat, foil grill, grilled egg, grilled rice ball, etc., the high temperature cooking menu is selected. Thereby, hot air of high temperature of 280 ° C. to 300 ° C. is circulated in the heating chamber 3a.

  In order to circulate hot air of 280 ° C. to 300 ° C. in the heating chamber 3a as described above, the temperature of the combustion exhaust gas generated in the combustion chamber 3b is set to a higher temperature of about 350 ° C. The hot air of the high-temperature combustion exhaust gas is sent from the combustion chamber 3b to the hot air passage 44 and blown out on the left and right sides of the rear wall 36 of the heating chamber 3a as hot air through the opening 45a and the circulation passage 61. The air is blown into the heating chamber 3 a from the hole 21 and circulates in the heating chamber 3 a by the rotational drive of the circulation fan 6. As a result, the food to be cooked is exposed to high-temperature hot air, and the food to be cooked is burnt, resulting in a finish that is excellent in aesthetics.

  At this time, the hot air of the high-temperature combustion exhaust gas generated in the combustion chamber 3b is directly sent to the hot air passage 44, but the rear wall 36 constituting the heating chamber 3a is blocked by the rear surface on the rear side. Since it has a double structure in which the hot plate 38 is disposed, the rear wall 36 is prevented from being directly exposed to the hot air of the combustion exhaust gas, and the temperature rise of the entire rear wall 36 is suppressed.

  In addition, the plate part 22 and the duct part 24 are directly heated with high-temperature hot air. However, as described above, since the surface treatment processing that can withstand high temperature is performed by the enamel, Less thermal degradation even when exposed to hot air.

  Furthermore, since high-temperature hot air is blown out from the blow-out holes 21 of the plate portion 22, the front surface of the plate portion 22 facing the heating chamber 3a is more dirty than the other inner wall of the heating chamber 3a. Few. Further, even if dirt is attached to the front surface of the plate portion 22, the dirt is easily removed because the surface treatment is performed by the enamel which is a high heat resistant coating material.

  In addition, since surface treatment processing with an expensive enamel need only be performed on the plate portion 22 and the duct portion 24, compared to the surface treatment processing on the entire wall of the heating chamber 3a so as to withstand high temperature cooking. Manufacturing costs can be greatly reduced.

  Further, the inner surfaces of the constituent walls of the upper wall 33, the lower wall 34, the left and right side walls 35, and the rear wall 36 constituting the heating chamber 3a are surface-treated with a fluorine resin having a lower heat resistant temperature than the plate portion 22. However, the rear surface of the rear wall 36 is covered with a heat shield plate 38, and when hot air circulating through the heating chamber 3a through the blowout holes 21 of the plate portion 22 hits each component wall, the blowout holes The temperature is lower than the temperature near 21. Furthermore, since a part of the rear wall 36 is formed by the plate part 22 of the hot air blowing part 23 that is separate from the rear wall 36, the edge of heat is cut between the plate part 22 and the rear wall 36. Can do. And since the hot-air blowing part 23 is fixed to the rear wall 36 by the duct part 24, and the attachment part of the fastening member for fixing to the rear wall 36 is not provided in the plate part 22, the whole surface of the plate part 22 is provided. The blowout holes 21 can be formed without unevenness. In addition, since the rear wall 36 is not provided with an attachment piece or the like for attaching the plate portion 22, the hot air sent from the circulation passage 61 is prevented from spreading vertically and horizontally from the blowout hole 21. And can be blown out linearly. Therefore, it is difficult for hot hot air sent into the heating chamber 3 a to be blown directly onto the upper wall 33 and the side wall 35. Therefore, even if surface heat treatment is performed on each inner surface of the constituent wall with a fluororesin that has a low heat-resistant temperature but is excellent in cleanability, there is little thermal deterioration. Aesthetics can also be maintained.

(Embodiment 2)
The heating cooker in the present embodiment is the above-described embodiment except that the hot air blowing part 23 is composed only of the plate part 22 constituting a part of the rear wall 36 and is detachably provided on the rear wall 36. The basic configuration is the same as that of No. 1 cooking device. For this reason, about the structure similar to the heating cooker in Embodiment 1, description is abbreviate | omitted using the same reference number, and only a different part is mainly demonstrated.

  FIG. 4 is a schematic cross-sectional perspective view of the heating cooker according to the present embodiment, and FIG. 5 is a cross-sectional main part perspective view showing a rear portion of the heating cooker. As shown in the figure, the left and right blowing openings 20 of the rear wall 36 are provided with attachment pieces 26 so as to suspend the vertical sides of the blowing openings 20. A screw hole 26 h is formed in the attachment piece 26, and the plate portion 22 that penetrates the numerous blowout holes 21 is screwed to the attachment piece 26 so as to close the blowout opening 20. Accordingly, in the present embodiment, hot air is sent into the heating chamber 3 a from the blowout holes 21 provided in the plate portion 22, and the plate portion 22 functions as the hot air blowout portion 23. The plate portion 22 is made of a steel plate for enameled steel plate with both sides treated with enamel surface treatment. If the screw P is removed, the plate portion 22 can be removed from the rear wall 36. It is comprised so that it may become.

  In addition, since the hot air blowing part 23 of this Embodiment consists only of the plate part 22 which comprises a part of rear wall 36, the circulation channel | path 61 for circulating the hot air formed behind the rear wall 36 is the The upper surface, the bottom surface, and the front end portions of both side surfaces of the circulation fan case 60 are joined to the peripheral edge of the rear wall 36 and closed.

  According to the cooking device of the present embodiment, since the plate portion 22 is detachably attached to the rear wall 36, when the plate portion 22 becomes dirty, the plate portion 22 is easily detached from the rear wall 36. Dirt can be removed, and the plate portion 22 is excellent in cleanability. Moreover, since the surface treatment process by an expensive enamel should just be implemented only to the plate part 22, manufacturing cost can be reduced more.

(Other embodiments)
(1) In the above embodiment, the oven burner 43 is used as the heating means, but other heating means such as an electric heater may be used. FIG. 6 is a perspective view of an essential part of a transverse section showing a rear portion of a cooking device having an electric heater as a heating means.

  In this cooking device, the oven burner 43 is not disposed below the heating chamber 3a, and an electric heater 48 is disposed in the circulation passage 61 behind the plate portion 22 as shown in the figure. As such an electric heater 48, a sheathed heater capable of generating high-temperature hot air can be used. The lower portion of the heating chamber 3a is the same as the combustion chamber 3b of the heating cooker in the above embodiment except that the oven burner 43 is not provided. And functions as a ventilation chamber for taking in air for circulation from the outside. Therefore, in this heating cooker, when the oven fan is cooked, the rotation of the circulation fan 6 and the cooling fan 7 is started, and when the electric heater 48 is energized, hot air is generated in the circulation passage 61. Occur. And by the air introduce | transduced from the ventilation chamber under the heating chamber 3a, the hot air which generate | occur | produced in the channel | path 61 for a circulation is sent out as hot air in the heating chamber 3a from the blowing hole 21, and the hot air in the heating chamber 3a is sent out. Then, the air is sucked into the circulation passage 61 through the suction hole 31 formed in the rear wall 36. Thereby, a hot air can be circulated in the heating chamber 3a, and oven cooking can be performed.

(2) In the above-described embodiment, the inner surfaces of the constituent walls of the upper wall 33, the lower wall 34, the left and right side walls 35, and the rear wall 36 of the heating chamber 3a have been surface-treated with a fluororesin. The surface treatment may be performed with a silicon-based resin.

(3) In the said embodiment, although the hot air blowing part 23 which has the plate part 22 and the duct part 24 which performed the surface treatment process by the enamel on the base material made from the steel plate for enamels is used, the surface treatment process by an enamel Alternatively, a hot air blowing section 23 made of stainless steel that is not subjected to the above may be used. That is, although it is inferior to dirt adhesion and cleanability than the hot air blowing part 23 subjected to the surface treatment with enamel, it is made of stainless steel than the case where the surface treatment with fluorine resin is applied. The part 23 is less subject to thermal degradation due to hot hot air. Further, since stainless steel has low thermal conductivity, there is little heat conduction to the rear wall 36 even when the plate portion 22 is heated, and it is possible to prevent the rear wall 36 from being heated by the heat received by the plate portion 22.

(4) Although the enamel is used as the high heat resistant coating material in the above embodiment, a heat resistant ceramic having better heat resistance than a fluorine resin or a silicon resin may be used. However, an enamel is preferably used because the heat-resistant ceramic has a problem that the heat-resistant ceramic is peeled off together with the dirt when the sticking dirt is strongly rubbed.

20... Blowout opening 21... Blowout hole 22... Plate portion 23... Hot air blowout portion 24. Wall 3a ... Heating chamber 3b ... Combustion chamber 43 ... Oven burner (heating means)
6 .... circulation fan

Claims (5)

Heating means for generating hot air;
A heating chamber in which the object to be cooked is heated by circulating the hot air generated by the heating means as hot air blown out from the hot air blowing portion provided on the rear wall;
A circulating fan for blowing the hot air into the heating chamber and circulating the hot air into the heating chamber;
The inner surface of the constituent wall of the heating chamber is subjected to a surface treatment process with a surface treatment material excellent in cleanability over substantially the entire area excluding the hot air blowing portion provided on the rear wall,
The heat air blow-fat, together and a separate body from the said rear wall, a number of outlet holes constituting a part of the rear wall is made of the plate portion through,
Said plate portion is Ri Do or from high heat resistant material surface treatment by high heat resistant coating material with a higher heat resistance temperature than the surface treatment material to the substrate is applied, the plate portion, said rear wall to cover the outlet opening formed in the heating cooker that has been removably attached to the rear wall.   Heating means for generating hot air;
  A heating chamber in which the object to be cooked is heated by circulating the hot air generated by the heating means as hot air blown out from the hot air blowing portion provided on the rear wall;
  A circulating fan for blowing the hot air into the heating chamber and circulating the hot air into the heating chamber;
  The inner surface of the constituent wall of the heating chamber is subjected to a surface treatment process with a surface treatment material excellent in cleanability over substantially the entire area excluding the hot air blowing portion provided on the rear wall,
  The hot air blowing part is formed separately from the rear wall, and a plate part through which a plurality of blowing holes constituting a part of the rear wall penetrates, and a duct formed integrally with the plate part. And at least
  The plate part and the duct part are subjected to surface treatment processing with a high heat resistant coating material having a heat resistant temperature higher than that of the surface treatment material on the base material or made of a high heat resistant material,
  The plate portion is provided so as to cover a blowout opening formed in the rear wall,
  The said duct part is a heating cooker which comprises a part of channel | path for circulation for guiding the hot air circulated by the said circulation fan to the blowing hole of the said plate part. The cooking device according to claim 2,
The inner surface of the wall of the heating chamber is subjected to surface treatment with a fluorine-based resin or a silicon-based resin over substantially the entire area excluding the hot air blowing portion provided on the rear wall,
The plate portion and the duct portion are cooking devices in which a surface treatment by enamel is applied to a base material. In the heating cooker according to any one of claims 1 to 3 ,
The heating means further includes a combustion chamber provided with an oven burner that generates gas by burning gas.
The heating chamber is a heating cooker that communicates with the combustion chamber and in which hot air generated by the oven burner is circulated as hot air. The cooking device according to claim 4 , wherein
The rear wall is a heating cooker having a double structure in which a heat shield plate is disposed on the rear surface.

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