JP6114920B2 - Cooker - Google Patents

Description

  The present invention relates to a heating cooker that heats an object to be heated in a heating chamber using a convection heating method in which hot air is formed by a blower fan and a heater, and the formed hot air is convected into the heating chamber.

  Conventionally, in a cooking device as a heating device of this type, generally, a hot air circulation mechanism including a blower fan and a heater is provided behind a rear wall that is a back surface of a heating chamber in which an object to be heated is disposed. Is provided. This hot air circulation mechanism sucks air in the heating chamber from a suction port provided on the rear wall of the heating chamber by a blower fan, blows it to the heater, and blows hot air heated by the heater on the rear wall of the heating chamber. It is configured to blow out from the outlet to the heating chamber. In a heating cooker equipped with a hot air circulation mechanism, cooking is performed on an object to be heated in the heating chamber by a convection heating method that utilizes hot air circulating in the heating chamber.

  In such a conventional cooking device, there is one in which hot air is supplied from a blower outlet to a heating chamber using a wind direction plate provided in a hot air circulation mechanism, and temperature distribution in the heating chamber is made uniform ( For example, see Patent Document 1).

  Furthermore, for the purpose of cooking without heating unevenness for the object to be heated, an air direction changing member is provided in the vicinity of the outlet of the hot air circulation mechanism, and a part of hot air from the blower fan is collected, Some have been configured to spread hot air into the heating chamber (see, for example, Patent Document 2).

FIG. 12 is a side sectional view showing an internal configuration of a conventional cooking device disclosed in Patent Document 1. As shown in FIG. In the cooking device shown in FIG. 12, an inner casing 103 is provided on the outer surface of the rear wall 102 which is the back surface of the heating chamber 101, and the rear wall 102 and the inner casing 103 form a casing of the hot air circulation mechanism. Is configured. Inside the hot air circulation mechanism, a blower fan 104 configured by a centrifugal fan and a substantially annular heater 105 are provided. In the center of the rear wall 102 of the heating chamber 101, a suction port 106 made up of a number of punching holes is formed. In the rear wall 102, a plurality of air outlets 107 made up of a number of punching holes are formed at positions above and below the suction port 106.

  The blower fan 104 that is a centrifugal fan is provided inside the inner casing 103 so as to face the suction port 106 formed in the center of the rear wall 102 of the heating chamber 101. The blower fan 104 is rotationally driven by a motor 108 provided outside the inner casing 103. The heater 105 is a substantially annular sheathed heater provided so as to surround the blower fan 104.

  In the conventional cooking device shown in FIG. 12, a part of hot air sent out in the centrifugal direction from the blower fan 104 and heated by the heater 105 is configured to be dammed by the wind direction plate 109. The wind direction plate 109 is provided behind the air outlet 107 and in the vicinity of the air outlet 107 in the direction of the flow of the hot air sent out from the blower fan 104.

  The air direction plate 109 aims to increase the amount of hot air supplied from the air outlet 107 to the heating chamber 101 by damming and collecting part of the hot air from the blower fan 104. In order to achieve this object, in the conventional cooking device shown in FIG. 12, the plate surface of the wind direction plate 109 with which the hot air from the blower fan 104 abuts is perpendicular to the rear wall 102, and from the rotation center of the blower fan 104. Are arranged so as to be parallel to the centrifugal direction or the vertical direction of the blower fan 104.

  Also, in the conventional cooking device disclosed in Patent Document 2, similarly to the cooking device disclosed in Patent Document 1, one of the hot air heated from the blower fan 104 in the centrifugal direction and heated by the heater is used. The section is configured to be dammed up by a wind direction changing member, and changes the wind direction of hot air supplied from the outlet 107 to the heating chamber 101. The air direction changing member is disposed in the vicinity of the air outlet 107 and behind the air outlet 107 in the direction in which the hot air flows by the blower fan 104. The conventional cooking device disclosed in Patent Document 2 changes the wind direction by blocking a part of hot air from the blower fan 104 by a wind direction changing member, and reduces the bias of the hot air inside the heating chamber 101. The purpose is that.

  In the conventional cooking device configured as described above, when an object to be heated is accommodated in the heating chamber 101 and heating cooking is started, the blower fan 104 is rotationally driven by the motor, and the heating chamber 101 is rotated. The air inside is sucked into the hot air circulation mechanism from the suction port 106. Further, the air inside the hot air circulation mechanism is sent out in the centrifugal direction by the rotation of the blower fan 104. The air sent from the blower fan 104 in the centrifugal direction is heated by a heater and supplied to the heating chamber 101 from a plurality of outlets 107 (for example, the upper position, the lower position, and the side position of the rear wall 102). The In this way, hot air circulates in the heating chamber 101 and in the hot air circulation mechanism, and convection heating is performed on the object to be heated in the heating chamber 101.

  In the conventional cooking device, when the convection heating is started, a part of the hot air comes into contact with the wind direction changing member which is a wind direction plate inside the hot air circulation mechanism, and is opposite to the rotation direction of the blower fan 104. The hot air is introduced into the heating chamber 101 from the air outlet 107 near the wind direction plate. Thus, by providing a plurality of wind direction plates inside the hot air circulation device, hot air from the plurality of outlets 107 is supplied into the heating chamber 101, and uneven heating, so-called uneven baking, is suppressed.

Further, there has been proposed a heating cooker that adjusts the direction of hot air circulating in the heating chamber 101 according to the accommodation position, shape, size, and the like of the object to be heated in the heating chamber 101 (for example, Patent Documents). 3, see Patent Document 4). In the conventional cooking device disclosed in Patent Document 3 or Patent Document 4, the heating chamber 101 is provided with means for changing the direction of the wind, and the circulation direction of the hot air in the heating chamber 101 is forcibly set. To change.

  Further, in the conventional cooking device, as shown in FIGS. 9 and 11, in the radial direction of the centrifugal fan, a mechanism for directing the hot air toward the center of the heating chamber is provided, and the hot air generated from the blower fan is shown in FIGS. As shown by the direction of the arrow 11, the hot air was directed toward the center of the heating chamber (see, for example, Patent Document 5).

  In addition, as shown in FIG. 7, the direction of the hot air in the tangential direction of the centrifugal fan is away from the central direction of the heating chamber, and in the direction perpendicular to the centrifugal direction, the direction of the hot air is not directed toward the central direction of the heating chamber. (For example, see Patent Document 6).

Japanese Patent Publication No.7-111256 JP 2006-71124 A JP-A-6-347041 JP 2004-353922 A International Publication No. 2011/086948 JP 2012-52688 A

  In the configuration of the conventional cooking device disclosed in Patent Document 1 or Patent Document 2, the air flow from the blower fan 104, which is a centrifugal fan, is sent out in the centrifugal direction of the blower fan 104, and is heated in the hot air circulation mechanism. 101 flows along the rear wall 102.

  In addition, the airflow direction of the airflow from the blower fan 104 is inclined in the rotational direction from the radial direction of the blower fan 104 according to the rotation of the blower fan 104, and is in a so-called outward spiral shape. Further, depending on the relationship between the amount of air sent out by the blower fan 104 and the rotation speed of the blower fan 104, the air flow may be blown out in a direction close to the tangential direction in the rotation of the blower fan 104. For this reason, most of the hot air blown out from the hot air circulation device is blown outwardly from the plurality of outlets 107 on the rear wall 102 of the heating chamber 101 or onto the side surface, ceiling surface, and bottom surface of the heating chamber 101.

  The conventional cooking device disclosed in Patent Document 1 or Patent Document 2 is configured such that a wind direction changing member, which is a wind direction plate, is provided inside the hot air circulation mechanism so that the amount of hot air from the outlet 107 increases. ing. The direction of the hot air blown out from the air outlet 107 is a direction close to a substantially tangential direction in the rotation of the blower fan 104. For this reason, hot air from the outlet 107 formed at the lower position of the rear wall 102 of the heating chamber 101 flows along the bottom surface of the heating chamber 101, and the blower formed at the upper position of the rear wall 102 of the heating chamber 101. Hot air from the outlet 107 flows along the ceiling surface of the heating chamber 101. And the hot air from the blower outlet 107 formed in the side position of the rear wall 102 of the heating chamber 101 flows along a side surface. As a result, the hot air blown out from the hot air circulation mechanism mainly heats the wall surface of the heating chamber 101.

  Therefore, in the conventional cooking device, the wall surface of the heating chamber 101 has a higher temperature than the object to be heated in the heating chamber 101, and the heat dissipation loss is increased. There was a problem of not heating.

In the conventional cooking device, the hot air blown into the heating chamber 101 from the hot air circulation mechanism is substantially tangential to the rotation circle of the blower fan 104 from the blower outlet 107 and is perpendicular to the rotation axis of the blower fan 104. In some cases, the air is blown in a direction and flows along the rear wall 102 of the heating chamber 101.

  The hot air blown out from the outlet 107 along the rear wall 102 of the heating chamber 101 collides with the upper, lower, left and right wall surfaces of the heating chamber 101 and directly heats these wall surfaces. As a result, the conventional cooking device has a problem that the heating efficiency for the object to be heated further deteriorates.

  Moreover, in the structure of the conventional heating cooker disclosed by the above-mentioned patent document 3 or patent document 4, according to the accommodation position, shape, size, etc. of the to-be-heated object in a heating chamber, predetermined position in a heating chamber The control mechanism was fixed to the heater, and the heating operation was performed by adjusting the direction of the hot air in the heating chamber.

  Therefore, in the conventional cooking device disclosed in Patent Document 3 or Patent Document 4, since the direction of the hot air cannot be changed during the heating operation, the hot air is directly applied to the object to be heated with high efficiency. There has been a problem that it is impossible to achieve both heating of an object and uniform heating of an object to be heated which is likely to cause uneven baking.

  Further, in the conventional cooking device disclosed in Patent Document 5, the airflow direction of the airflow from the blower fan is inclined from the radial direction of the blower fan to the rotational direction according to the rotation of the blower fan as described above. The airflow is blown in a direction close to the tangential direction in the rotation of the blower fan, depending on the relationship between the amount of air sent out by the blower fan and the rotational speed of the blower fan. In some cases, the direction of hot air may not be directed toward the center of the heating chamber in the direction perpendicular to the centrifugal direction from the center of the blower centrifugal fan.

  In addition, in the conventional cooking device disclosed in Patent Document 6, the heated object is heated efficiently by directly applying hot air to the object to be heated, and the object to be heated is likely to be unevenly burned. There was a problem that heating could not be made compatible.

  The present invention solves the above-mentioned conventional problems, and uniformly applies hot air from the outlet to the object to be heated in the heating chamber and reduces direct heating to the wall surface of the heating chamber, An object of the present invention is to provide a heating apparatus that can heat a heated object with high efficiency by performing a concentrated heating operation on the object to reduce heat dissipation loss from the wall surface of the heating chamber.

  In order to solve the conventional problems, a heating cooker according to the present invention includes a heating chamber for storing an object to be heated, and a suction port formed in a partition wall between the heating chamber and a plurality of outlets. A heat source chamber that communicates with the heating chamber, and inside the heat source chamber, a blower unit that forms an air flow, a heating unit that heats the air flow, and an air flow heated by the heating unit is provided in the partition wall Heating in which a flow path forming portion is provided that forms a flow path that blows out from at least one of the plurality of air outlets in the heat source chamber toward the center of the heating chamber. In the apparatus, the flow path forming portion is configured to be configured such that a wind direction plate (wind direction changing member) in a direction perpendicular to the centrifugal direction from the center of the blower centrifugal fan and a wind direction plate in the centrifugal direction surround the air outlet. In the equipment, heat source chamber The hot air generated by the blower unit and the heating unit is caused to flow through the flow path formed by the flow path forming unit, so that the hot air blown into the heating chamber from the outlet is directed toward the center of the heating chamber. The centrifugal wind direction plate is provided with a front wind direction plate and a rear wind direction plate with respect to the rotation of the centrifugal fan. Both the centrifugal direction and the direction perpendicular to the centrifugal direction can be directed toward the center of the heating chamber.

  The heating device of the present invention can uniformly apply hot air from the outlet to the object to be heated in the heating chamber, and direct the hot air from the outlet to the center of the heating chamber to concentrate on the object to be heated. By performing a proper heating operation, the object to be heated can be heated with high efficiency.

Side surface sectional drawing which shows the internal schematic structure of the heating cooker which concerns on Embodiment 1 of this invention. Plan sectional drawing by the one part AA line in the heating cooker shown in FIG. The perspective view which shows the partition used as the back wall of the heating chamber in the heating cooker of Embodiment 1. FIG. Side surface sectional drawing by the BB line of a part in the heating cooker shown in FIG. The top view which shows the internal structure of the conventional heating cooker The perspective view which shows the internal schematic structure of the conventional heating cooker Plan sectional drawing by the CC line of a part in the conventional heating cooker shown in FIG. Side sectional view showing an internal schematic configuration of another conventional cooking device Plan sectional drawing by the II-II line of a part in the conventional heating cooker shown in FIG. The perspective view which shows the partition used as the back wall of the heating chamber in the conventional heating cooker shown in FIG. The perspective view which shows the inside of the heat source chamber in the further another heating cooker in the past. Side sectional view showing the internal configuration of still another conventional cooking device

1st invention is provided with the heating chamber which accommodates a to-be-heated material, and the heat source chamber which connects with the said heating chamber by the suction inlet formed in the partition between the said heating chambers, and a plurality of outlets, Inside the heat source chamber, a blower fan that forms an air flow, a heating unit that heats the air flow, and at least one of the plurality of air outlets are surrounded by a shape of the air outlet. the wind direction plate forms a flow path forming unit which is arranged so provided a flow path forming unit which air flow is heated to form a flow path for blowing toward the center of the heating chamber from the outlet port by the heating unit In the flow path forming portion in which a wind direction plate is formed on the partition from the partition toward the heat source chamber, all or a part of the wind direction plate is shorter than the size between the heat source chamber and the back of the heating chamber. A predetermined space is provided between the tip of the plate and the back of the heating chamber. The wind direction plate in the centrifugal direction from the center of the blower fan in the partition plane has front and rear wind direction plates in the rotation direction of the blower fan at the outlet, and the front and rear wind direction plate dimensions are different. It is a heating cooker comprised by the wind direction board provided so that the height of the axial direction might become higher in the direction of the said back wind direction board than the wind direction board of the said front side .

  According to the present invention, it is desired to blow hot air heated in the heat source chamber toward the center of the heating chamber, by changing the direction of the hot air by providing a wind direction plate around the air outlet, and from the air outlet to the heating chamber. A flow path that blows out toward the center can be formed.

In the first aspect of the present invention , in the wind direction plate of the flow path forming part in which the wind direction plate is formed on the partition from the partition toward the heat source chamber , all or some of the dimensions are from the heat source chamber to the heating chamber rear surface. It is a heating cooker shorter than the dimension and provided with a predetermined space between the front end of the wind direction plate and the back of the heating chamber.

  According to the present invention, by providing a predetermined space between the front end of the wind direction plate and the back surface of the heating chamber, the hot air in the heat source chamber is circulated through at least a part of the space in the heat source chamber, so that the heating chamber is connected to the heating chamber. The flow path which blows out toward the center of can be formed.

  Further, according to the first aspect of the present invention, the wind direction plate in the centrifugal direction from the center of the blower fan in the partition plane has a wind direction plate before and after the blower fan rotating direction of the blowout port, and the front and rear wind direction plate dimensions are different. The axial height of the blower fan is higher in the rear wind direction plate than in the front wind direction plate.
It is a heating cooker comprised by the wind direction board provided so that it may be.

  According to the present invention, in the front wind direction plate and the rear wind direction plate in the fan rotation direction in the centrifugal direction, the front wind direction plate causes the hot air in the heat source chamber to circulate through at least a partial space in the heat source chamber, thereby A flow path that blows out toward the center of the heating chamber is formed, and at the same time, the direction of the hot air in the heat source chamber is also changed by the rear wind direction plate, and by the interaction of the front and rear wind direction plates, In the perpendicular direction, a flow path that blows out from the blower outlet toward the center of the heating chamber can be formed, but the axial height of the blower fan is higher in the rear wind direction plate than in the front wind direction plate. By providing in such a manner, the direction of blowing from the blower outlet toward the center of the heating chamber is adjusted in the direction perpendicular to the centrifugal direction of the fan, and is further directed toward the center of the heating chamber. Door can be.

A second aspect of the present invention is the heating cooker according to the first aspect , wherein the airflow direction plate of the flow path forming portion is arranged on a side portion having a polygonal shape in the partition plane, and the centrifugal direction from the center of the blower fan in the partition plane The wind direction plate is provided with at least two front and rear wind direction plates in the direction of fan rotation, and at least a predetermined space is provided between the front of the wind direction plate and the back of the heating chamber. It is a heating cooker which has a flow-path formation part.

According to the present invention, in the front wind direction plate and the rear wind direction plate in the fan rotation direction in the centrifugal direction, the front wind direction plate causes the hot air in the heat source chamber to circulate through at least a partial space in the heat source chamber, thereby A flow path that blows out toward the center of the heating chamber is formed, and at the same time, the direction of the hot air in the heat source chamber is also changed by the rear wind direction plate, and by the interaction of the front and rear wind direction plates, In the perpendicular direction, it is possible to form a flow path that blows out from the blower outlet toward the center of the heating chamber .

Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the embodiments.

(Embodiment 1)
A first embodiment according to the present invention will be described with reference to FIGS. 1 is a side cross-sectional view showing an internal schematic configuration of a heating cooker according to Embodiment 1 of the present invention, and FIG. 2 is a plan cross-sectional view taken along a line AA in the heating cooker shown in FIG. FIG. 3 is a perspective view showing a back wall which is a rear wall of the heating chamber in the heating cooker according to the first embodiment.

  In addition, in description of the heating cooker of Embodiment 1, the surface where the door which puts in / out a to-be-heated object is arrange | positioned is made into the front of a heating cooker, and the left-right direction is demonstrated as the direction seen from the front. Similarly, in the respective embodiments described later, the above definitions are used for the front and left-right directions.

  As shown in FIG. 1, the heating cooker according to the first embodiment has a heating chamber 2 having a substantially rectangular parallelepiped structure for housing a food material to be heated 10 inside a main body 1. Yes. The heating chamber 2 is made of a metal material, and includes a wall plate that forms a ceiling surface, a bottom surface, a left side surface, a right side surface, and a back surface, a door 3 that opens and closes in order to put in and out the object to be heated 10, and the object to be heated 10 And a plurality of support portions 4 that support the cooking pan 5 for performing. In the heating cooker of Embodiment 1, the support part 4 is formed so that the three-step cooking pan 5 may be arrange | positioned.

  A magnetron 6 and an antenna 7 are installed below the heating chamber 2, and electromagnetic waves generated in the magnetron 6 can be radiated into the heating chamber 2 via the antenna 7. The heating chamber 2 configured as described above is configured such that the electromagnetic wave supplied into the heating chamber 2 is confined in the heating chamber 2 by closing the door 3.

  In the first embodiment, the electromagnetic wave from the magnetron 6 is supplied to the heating chamber 2 via the antenna 7, but the present invention forms an electromagnetic wave by a circuit configuration using a semiconductor element. Thus, the present invention can be applied to a configuration in which power is supplied to the heating chamber and a configuration of a convection heating type oven cooker.

  Further, in the heating cooker of the first embodiment, a heat source chamber 8 is provided adjacent to the heating chamber 2 on the back side, which is the rear side of the heating chamber 2. Inside the heat source chamber 8, a blower fan 9 that is a centrifugal fan and a heater 11 composed of a sheathed heater that heats the air sent out by the rotational operation of the blower fan 9 are installed. The heater 11 in the heating cooker according to the first embodiment is disposed outside the blade portion of the blower fan 9 and is provided at a position offset to the rear side, and has a substantially square frame shape.

  In the first embodiment, an example in which the heater 11 has a substantially square frame shape will be described. However, the present invention is not limited to such a configuration, and other shapes such as an annular frame. Shape may be sufficient.

  A drive chamber 12, which is a space further behind the heat source chamber 8, is provided with a motor 13 that is a drive source. The shaft of the motor 13 passes through the heat source chamber back wall 14 which is the back surface of the heat source chamber 8, and a blower fan 9, which is a blower, is attached to the tip of the shaft. As described above, the heat source chamber 8 in which the heater 11 as a heating unit as a heat source is installed and the drive chamber 12 in which the motor 13 as a drive source is installed are partitioned by the inner case 22 having the heat source chamber rear wall 14. It is insulated.

  Further, a partition wall 15 that is a back wall of the heating chamber is provided between the heating chamber 2 in which the article to be heated 10 is accommodated and the heat source chamber 8 in which the blower fan 9 and the heater 11 are installed. The partition 15 spatially partitions the heating chamber 2 and the heat source chamber 8.

  A suction port 16 is formed at a position (central region) facing the vicinity of the center of the blower fan 9 in the partition wall 15 that is the back wall of the heating chamber. Further, in the partition wall 15, an area close to the wall surface of the heating chamber 2 and an area outside the blower fan 9 is provided with a plurality of air outlets 17 </ b> A, 17 </ b> B, 17 </ b> C, 17 </ b> D, 23 </ b> A, 23B (see FIG. 3) is formed.

  In the heating cooker according to the first embodiment, as shown in FIG. 1, the heat source chamber rear wall 14 is not flat, and the central portion protrudes toward the heat source chamber in order to provide the motor 13 in the rear drive chamber 12. The shape is formed. In other words, the heat source chamber back wall 14 is formed in a concave shape so that the outer peripheral portion protrudes toward the drive chamber 12 side. The motor 13 is arranged in a recessed space on the drive chamber 12 side formed in the central portion of the heat source chamber back wall 14.

  In the heating cooker according to the first embodiment, as described above, the heating chamber 2 includes the left side surface 18, the right side surface 19, the bottom surface 20, the ceiling surface 21, and the back surface in addition to the door 3 that is the front surface. It is comprised by the partition 15 which is a back wall. The left side surface 18 and the right side surface 19 are provided with three upper and lower support portions 4 protruding into the heating chamber 2 substantially in parallel with the bottom surface 20. The cooking tray 5 can be held in the heating chamber 2 by these support portions 4.

As described above, the heat source chamber 8 surrounded by the inner case 22 including the partition wall 15 and the heat source chamber rear wall 14 is disposed behind the partition wall 15 serving as the back surface of the heating chamber 2. Yes. That is, the partition wall 15 serving as the back surface of the heating chamber 2 serves to separate the heating chamber 2 from the heat source chamber 8. Inside the heat source chamber 8, a blower fan 9 which is a centrifugal fan and a heater 11 are provided. The blower fan 9 and the heater 11 are controlled by a control unit 24 provided inside the main body 1.

  As shown in FIGS. 2 and 3, a suction port 16 made up of a number of punching holes is formed in the central portion of the partition wall 15 which is the back surface of the heating chamber 2. The partition wall 15 has a plurality of air outlets 17A, 17B, 17C, 17D, 23A, and 23B formed in a region around the air inlet 16 with the air inlet 16 as the center. In the region near the upper end portion of the partition wall 15, upper air outlets 17 </ b> A and 17 </ b> B configured with a number of punching holes are formed in a band shape in the region from the vicinity of the end portion near the left side surface 18 of the heating chamber 2 to the substantially central portion. It is formed to be elongated in the horizontal direction.

  Similarly, in the region near the lower end portion of the partition wall 15, lower air outlets 17 </ b> C and 17 </ b> D configured with a number of punching holes are provided in the region from the vicinity of the end portion near the right side surface 19 of the heating chamber 2 to the substantially central portion. It is formed in a strip shape and elongated in the horizontal direction.

  As described above, the two upper air outlets 17A and 17B and the lower air outlets lower air outlets 17C and 17D formed in the partition wall 15 are formed by adjusting the baking unevenness based on point symmetry with respect to the center of the inlet port 16. Yes. In FIG. 3, the arrow indicates the rotation direction of the blower fan 9.

  Further, in the partition wall 15, the air outlets 23 </ b> A and 23 </ b> B configured with a number of punching holes are formed in the horizontal direction in the left and right regions of the suction port 16 (see FIG. 3).

  As described above, the partition wall 15 is provided with the left outlet 23A and the right outlet 23B, which are similarly configured by a number of punching holes, at the left and right positions sandwiching the suction port 16, respectively. The shapes of the upper outlets 17A and 17B and the lower outlets 17C and 17D are longer in the horizontal direction and shorter in the vertical direction than the shapes of the left outlet 23A and the right outlet 23B ( (See FIG. 3). The heating chamber 2 and the heat source chamber 8 communicate with each other through punching holes of the suction port 16, the upper and lower outlets 17A, 17B, 17C, and 17D and the left and right outlets 23A and 23B in the partition wall 15.

  The punching holes constituting the suction port 16, the upper and lower outlets 17A, 17B, 17C, 17D and the left and right outlets 23A, 23B have a diameter of 2 to 5 mm so that electromagnetic waves do not leak out of the heating chamber 2 during electromagnetic wave heating. It is formed as a collection of holes of a certain degree.

  An intake portion of the blower fan 9 in the heat source chamber 8 is disposed so as to face the suction port 16 of the partition wall 15. A substantially ring-shaped heater 11 having a substantially square frame shape is provided on the outer peripheral portion serving as an exhaust portion of the blower fan 9. The blower fan 9 is rotationally driven by a motor 13 provided outside the heat source chamber 8 to generate an air flow that sends out air in the centrifugal direction. The generated air flow is heated by the heater 11 at the outer peripheral position of the blower fan 9 to become hot air, and is supplied into the heating chamber 2 from the upper and lower outlets 17A, 17B, 17C, 17D and the left and right outlets 23A, 23B. To the object 10 to be convection heated.

  In the partition wall 15 serving as the back wall of the heating chamber 2, a first flow path forming portion 30 </ b> A is provided on the back surface on the heat source chamber 8 side between the central suction port 16 and the left outlet 23 </ b> A. Yes. Further, on the back surface of the partition wall 15, a second flow path forming portion 30B is provided between the suction port 16 provided in the center and the right outlet 23B. The first flow path forming part 30 </ b> A and the second flow path forming part 30 </ b> B are formed such that one end is fixed to the back surface of the partition wall 15 and the other end protrudes into the internal space of the heat source chamber 8.

  The protruding end portions of the first flow path forming portion 30A and the second flow path forming portion 30B are disposed with a predetermined gap from the heat source chamber back wall 14. In addition, the first flow path forming portion 30A and the second flow path forming portion 30B are provided between the heater 11 disposed so as to surround the blower fan 9 and the respective outlets 23A, 23B. . As described above, the blower fan 9, the heater 11, the first flow path forming portion 30 </ b> A, and the second flow path forming portion 30 </ b> B are configured by the partition wall 15 and the inner case 22 having the heat source chamber back wall 14. It is provided inside the heat source chamber 8 to form a special air flow in the heat source chamber 8.

  As shown in FIGS. 2 and 3, on the back surface of the partition wall 15, the first flow path forming portion 30 </ b> A and the second flow path forming portion 30 </ b> B at the left and right positions of the suction port 16 provided in the center are It has a substantially right angle (about 90 degrees) with respect to the plane (vertical plane) formed by the partition wall 15 and is formed so as to surround the left and right outlets 23A and 23B. The wind direction plate 30Aa and the wind direction plate 30Ba in the direction perpendicular to the centrifugal direction from the center of the fan 9 are arranged, the wind direction plates 30Ac and 30Bc are arranged on the front side in the rotation direction of the blower fan 9, and the wind direction plates 30Ab and 30Bb are arranged on the rear side. To do.

  The wind direction plate may have a predetermined angle (an angle of about 45 degrees to 135 degrees) with respect to a plane (vertical plane) formed by the partition wall 15.

  The wind direction plates 30Aa, 30Ab, 30Ac and the wind direction plates 30Ba, 30Bb, 30Bc are fixed to the partition wall 15 in parallel with the plane (vertical surface) formed by the partition wall 15 and in the opposite direction to the air outlets 23A, 23B. A fixing portion is provided, and the flow path forming portions 30A and 30B are fixed to the partition wall 15 by caulking or welding. In the first embodiment, each of the first flow path forming portion 30A and the second flow path forming portion 30B is formed by bending a metal plate along a straight line.

  In addition, the material of 30 A of 1st flow-path formation parts and the 2nd flow-path formation part 30B is not limited to a metal, If it is the material which has the heat resistance which can hold | maintain a shape, it can be used.

  In the first embodiment, for the first flow path forming portion 30A (wind direction plates 30Aa, 30Ab, 30Ac) and the second flow path forming portion 30B (wind direction plates 30Ba, 30Bb, 30Bc), the wind direction plates 30Aa, 30Ab The air blowing plates 30Ba and 30Bb have dimensions in the axial direction of the blower fan that are approximately half (about 1/2) of the dimensions of the partition wall 15 and the heat source chamber rear wall 14, that is, the depth of the heat source chamber 8, and the air direction plates 30Ac and 30Bc. The size of the blower fan in the axial direction is approximately half (about 1/2) of the wind direction plates 30Aa, 30Ba, and is provided so as to be approximately 1/4 of the size of the partition wall 15 and the heat source chamber rear wall 14.

  The air direction plates 30Aa and 30Ab and the direction plates 30Ba and 30Bb in the axial direction of the blower fan only need to maintain a predetermined space from the rear wall 14 of the heat source chamber, and are about 1/2/10 / 10 is desirable. In addition, it is desirable that the size of the airflow direction plates 30Ac and 30Bc in the direction of the blower fan axis is 3/10 to 7/10, which is about 1/2 that of the airflow direction plates 30Aa and 30Ba. Then, the size and ratio of each of the wind direction plates 30Aa, 30Ab, 30Ac and the wind direction plates 30Ba, 30Bb, 30Bc in the axial direction of the blower fan depend on the specifications of the heating device so that the hot air is directed toward the center of the heating chamber 2. To decide.

  In addition, although the 1st flow path formation part 30A and the 2nd flow path formation part 30B demonstrated in the example formed longer than the length of the up-down direction of left-right outlet 23A, 23B, this invention has such a structure. It is not limited, You may form shorter than the length of the up-down direction of a left-right blower outlet according to the specification etc. of the said heating apparatus.

  In the heating cooker according to the first embodiment, the main body 1 including the heat source chamber 8 having the blower fan 9 and the heater 11 and the drive chamber 12 having the motor 13 is secured while ensuring the internal volume of the heating chamber 2. In order to reduce the depth dimension, the depth dimension of the heat source chamber 8 and the drive chamber 12 is formed small.

  In the cooking device of the first embodiment, the blower fan 9 uses a centrifugal fan that does not deteriorate the blowing performance even if the depth dimension is small, and the depth dimension of the central portion that is the suction portion can be reduced. The air blowing fan 9 is used. For this reason, the heat source chamber back wall 14 through which the shaft of the motor 13 passes has a shape in which a portion close to the motor 13 is recessed on the heating chamber 2 side (front surface side), and the motor 13 is located inside the recess. Configured to be deployed. As a result, the size in the depth direction of the heat source chamber 8 and the drive chamber 12 is reduced.

  As shown in FIG. 1, in the heating cooker according to the first embodiment, the heat source chamber back wall 14 is formed as described above, and the motor 13 is arranged inside the recess of the heat source chamber back wall 14. The depth dimension of the part (center part) close to the motor 13 of the heat source chamber 8 is made small. In the heat source chamber 8, the depth dimension of the portion other than the portion close to the motor 13 (outer peripheral portion) is larger than that of the central portion, and an arrangement space for the heater 11 as a heating portion as a heat source is secured.

  Further, in the heating cooker according to the first embodiment, a space for arranging the first flow path forming unit 30A and the second flow path forming unit 30B at a predetermined position outside the heater 11 is secured. ing. In particular, an air flow path in the heat source chamber 8 formed by the first flow path forming part 30A and the second flow path forming part 30B is secured. Note that the heater 11 is arranged in the heat source chamber 8 so that the center position of the thickness (length in the depth direction) of the heater 11 is behind the center position in the depth direction of the blades of the blower fan 9. Has been.

  Hereinafter, the heating operation in the heating cooker according to the first embodiment of the present invention will be described.

  In the heating cooker according to the first embodiment, for example, when performing oven cooking, the cooking pan 5 on which the article to be heated 10 such as a cookie is placed is related to the support portion 4 provided on the left and right wall surfaces of the heating chamber 2. Stop and insert into the heating chamber 2. The cooking pan 5 is pushed in until it comes into contact with the partition wall 15 which is the back wall of the heating chamber 2, the door 14 is closed, and the heating chamber 2 becomes a heatable space. Oven cooking in the heating cooker is started by operating a predetermined button in an operation unit (not shown) provided on the front surface of the main body 1.

  In the operation unit, cooking conditions such as the heating time and heating temperature of the article to be heated 10 are set. A signal indicating the cooking condition set in the operation unit is input to the control unit 24 configured by a microcomputer. The control unit 24 drives and controls the heater 11 and the motor 13 based on a signal indicating cooking conditions.

  With the rotation of the motor 13, the blower fan 9, which is a centrifugal fan, starts rotating. By the rotation operation of the blower fan 9, a spiral outward air flow is blown out from the outer peripheral portion of the blower fan 9. The air flow blown out from the blower fan 9 is heated by the heater 11 disposed so as to surround the outer peripheral portion of the blower fan 9 to become a high-temperature air flow (hot air).

As described above, in the hot air sent to the outer peripheral side by the blower fan 9 and heated by the heater 11, the hot air sent to the left and right of the blower fan 9 is the first flow provided at the left and right positions of the blower fan 9. The left air outlet 23A and the right air outlet are in contact with the wind direction plates (30Aa, 30Ab, 30Ac) and the wind direction plates (30Ba, 30Bb, 30Bc) of the path forming portion 30A and the second flow path forming portion 30B and changing their directions. The hot air blown out from 23B to the heating chamber 2 and sent out upward of the blower fan 9 is blown out from the upper outlet 17A in the partition wall 15 to the heating chamber 2, and the hot air sent out below the blower fan 9 It blows off into the heating chamber 2 from the outlet 17B.

  Since these hot airs are spiral in the direction of rotation of the blower fan 9 and have an outward wind direction, the hot air from the upper outlet 17A is directed toward the ceiling surface 21 and the right side surface 19 of the heating chamber 2. The hot air from the lower outlet 17B flows in the direction of the bottom surface 20 and the left side surface 18 of the heating chamber 2. As described above, the shapes of the upper air outlet 17A and the lower air outlet 17B that are configured by a plurality of punching holes are strips that are elongated in the horizontal direction, and the left air outlet 23A and the right that are configured by a plurality of punching holes. Compared with the shape of the blower outlet 23B, it is formed long and narrow (see FIG. 3).

  Touch the wind direction plates (30Aa, 30Ab, 30Ac) and the wind direction plates (30Ba, 30Bb, 30Bc) of the first flow path forming unit 30A and the second flow path forming unit 30B, and change their directions to the left. The hot air blown out from the outlet 23A and the right outlet 23B into the heating chamber 2 has the dimensions of the airflow direction plates 30Aa, 30Ab and the airflow direction plates 30Ba, 30Bb in the axial direction of the blower fan, that is, the dimensions of the partition wall 15 and the heat source room rear wall 14, that is 8 is approximately half (1/2) the depth dimension of the wind direction plates 30Ac and 30Bc, and the dimension in the fan fan axial direction is approximately half (1/2) of the wind direction plates 30Aa, 30Ba (the partition wall 15 and the heat source chamber rear wall 14). Therefore, the direction of the hot air is directed toward the center of the heating chamber in the direction perpendicular to the centrifugal direction inside the heat source chamber 8. Of and the surface of the cooking dish 5 directly without heating the rear surface of the heating chamber 2 inside of the upper cooking dish 5, it is possible to reduce uneven heating of the heated object 10.

  As described above, according to the heating cooker of the first embodiment, the hot air blown from the heat source chamber 8 to the inside of the heating chamber 2 through the left and right outlets 23A and 23B is transferred to the object to be heated 10. It becomes possible to concentrate. As a result, in the heating cooker of the first embodiment, it is possible to reduce the heating unevenness of the article to be heated 10 during cooking, and the hot air is heated at the bottom surface 20 of the heating chamber 2 during preheating without the article 10 to be heated. The heating loss caused by heating only the wall surface without directly heating the top surface 21 can be significantly suppressed, and the heating chamber can be efficiently heated to efficiently cook the object to be heated. According to the heating cooker of Embodiment 1, the preheating time and cooking time of a heating chamber can be shortened, the cooking speed can be improved, and uneven heating can be improved.

  In the heating cooker of the first embodiment, the first flow path forming portion 30A and the second flow path forming portion 30B are fixed to the partition wall 15 which is the back wall of the heating chamber 2 (fixed by caulking or welding). ), The first flow path forming portion 30A and the second flow path forming portion 30B are configured to be fixed to other members forming the heat source chamber 8, and the left and right outlets 23A, You may arrange | position so that it may become a predetermined position with respect to 23B.

  The present invention relates to a heating device in industrial fields such as a microwave oven or an electric oven having an oven function by convection heating for home use, various oven heating devices for business use, a drying device, a heating device for ceramics, a sintering device, or a living body. The present invention can be applied to various heating devices such as a heating device used for chemical reactions.

DESCRIPTION OF SYMBOLS 1 Main body 2 Heating chamber 3 Door 4 Supporting part 5 Cooking dish 8 Heat source chamber 9 Blower fan 10 Heated object 11 Heater 12 Drive chamber 13 Motor 14 Heat source chamber back wall 15 Partition 16 Intake port 17A Upper outlet right 17B Upper outlet left 17C Lower air outlet left 17D Lower air outlet right 23A Left air outlet 23B Right air outlet 30A 1st flow path formation part 30B 2nd flow path formation part

Claims (2)

A heating chamber that houses an object to be heated, and a heat source chamber that communicates with the heating chamber through a suction port formed in a partition wall between the heating chamber and a plurality of outlets, and inside the heat source chamber , placed a blower fan for forming an air flow, a heating unit for heating the air flow, around at least one air outlet in said plurality of air outlets, the wind direction plate as surrounding according to the shape of the air outlet Forming a flow path forming portion, and a flow path forming portion is provided that forms a flow path in which the air flow heated by the heating portion blows out from the air outlet toward the center of the heating chamber ,
In the flow path forming part in which a wind direction plate is formed on the partition from the partition toward the heat source chamber, all or a part of the wind direction plate is shorter than the size between the heat source chamber and the back of the heating chamber. A predetermined space is provided between the tip of the heating chamber and the back of the heating chamber,
The wind direction plate in the centrifugal direction from the center of the blower fan in the partition plane has wind direction plates before and after the blower fan rotation direction of the blowout outlet, the front and rear wind direction plate dimensions are different, and the axial direction height of the blower fan is high. The wind direction plate provided so that the wind direction plate on the back side is higher than the wind direction plate on the front side,
Cooking cooker. The flow path forming part is arranged around a side of the polygonal plane in the partition plane around the at least one outlet in the plurality of outlets, and the wind direction plate in the centrifugal direction from the center of the blower fan in the partition plane The wind direction plate is provided at least at two locations on the front and rear sides of the blower fan in the direction of rotation of the blower fan, and a predetermined space is provided at least between the front wind direction plate tip and the back of the heating chamber . the heating cooker as claimed in claim 1 having a flow path forming unit.

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