JP2023028543A - heating cooker - Google Patents

Abstract

To provide a heating cooker which can perform multi-tier cooking which achieves low costs and little uneven baking.SOLUTION: A heating cooker has a cooking chamber therein and includes: an upper heater 11 disposed at the upper side of the cooking chamber; a lower heater 12 disposed at the lower side of the cooking chamber; and a middle heater 13 disposed on at least one of both sides as seen in a direction orthogonal to a vertical direction in the cooking chamber and between the upper heater 11 and the lower heater 12.SELECTED DRAWING: Figure 4

Description

TECHNICAL FIELD The present invention relates to a heating cooker having a heater inside the cooking chamber.

As a heating cooker, in addition to the upper and lower heaters in the cooking chamber, a heater and a temperature sensor are also provided inside the plate receiving shelf (four places) on the side wall surface is disclosed (for example, Patent Document 1 ).
As a result, multi-stage cooking is possible, and the temperature is detected by the temperature sensor on the side wall surface, and the energization of the heater is controlled to prevent uneven cooking of the food.

JP-A-10-047693

The above-described heating cooker has four heaters provided on the side wall surface, which poses a problem of high cost.
SUMMARY OF THE INVENTION An object of the present invention is to provide a heating cooker capable of performing multistage cooking with less uneven cooking at low cost.

A heating cooker according to the present invention is a heating cooker having a cooking chamber inside, wherein an upper heater arranged above the cooking chamber, a lower heater arranged below the cooking chamber, and the cooking chamber a middle heater disposed between the upper heater and the lower heater on at least one side of both sides in a direction perpendicular to the vertical direction of the heater.

According to the above configuration, since the intermediate heater is provided between the upper heater and the lower heater, multi-stage cooking can be performed at low cost and with less uneven cooking.

It is the perspective view which looked at the cooking-by-heating machine concerning an embodiment from the upper part, (a) is the state where the door was closed, (b) is the state where the door was opened, and the tray is attached up and down. Fig. 2 is a top perspective view of the cooker with the door open and the tray removed; It is the perspective view of the heating cooker which removed the door, (a) is the figure seen from the downward direction, (b) is the figure seen from upper direction. It is sectional drawing of a heating apparatus, (a) is a cross section orthogonal to the left-right direction, (b) is a cross section orthogonal to the front-back direction. It is a cross section orthogonal to the front-rear direction, and is an enlarged view of the periphery of the middle heater. It is sectional drawing which expanded the circumference|surroundings of a middle heater of another aspect. It is sectional drawing which expanded the circumference|surroundings of a middle heater of another aspect. It is sectional drawing which expanded the circumference|surroundings of a middle heater of another aspect.

<Overview>
A first heating cooker according to one aspect of the embodiment is a heating cooker having a cooking chamber inside, and includes an upper heater disposed above the cooking chamber and a lower heater disposed below the cooking chamber. and a middle heater disposed between the upper heater and the lower heater on at least one side of both sides in a direction perpendicular to the vertical direction in the cooking chamber. As a result, uneven baking can be reduced even if the installation locations of the medium heaters are reduced.
A second heating cooker according to another aspect of the embodiment is the first heating cooker, wherein the intermediate heater is provided on a flat portion of a side wall portion that constitutes the cooking chamber. Thereby, the temperature rise of the outer wall can be suppressed.
A third heating cooker according to another aspect of the embodiment is the first heating cooker, wherein the middle heater is a recess that is recessed outward in the orthogonal direction in the side wall portion that constitutes the cooking chamber. provided in the part. Thereby, the inside of the cooking chamber can be widely used.

A fourth heating cooker according to another aspect of the embodiment is any one of the first to third heating cookers, wherein the middle heater is a mica heater. Alternatively, the middle heater is a quartz tube heater or a sheathed heater. This makes it easy to implement.
A sixth heat cooker according to another aspect of the embodiment is the fifth heat cooker, further comprising a shielding plate for shielding heat rays emitted upward or downward from the middle heater. Thereby, the temperature rise of the outer wall can be suppressed.
A fifth heating cooker according to another aspect of the embodiment is the heating cooker according to any one of the first to sixth, wherein trays can be arranged in multiple stages in the vertical direction in the cooking chamber, and the middle heater is , and are accommodated between the two vertically adjacent trays when viewed from the orthogonal direction. As a result, the middle heater is directed toward the cooking chamber, and the heating efficiency can be improved.

<Embodiment>
1. Overall Configuration The heating cooker X has a cooking chamber 3 inside. As shown in FIG. 1, the heating cooker X includes a box-shaped heating device 1 whose one side is open and a door 5 whose one side opens and closes. A warehouse 3 is formed. The heating device 1 here has an open front surface, and a door 5 opens and closes the front surface. The heating cooker X detachably includes a plurality of (here, two) trays 7 for multistage cooking.
In addition, the open side of the heating device 1 is defined as the front side, and the side located on the right side in the left-right direction when the door 5 is viewed straight ahead is defined as the right side for convenience.
Each part will be described below.

2. Heating Device The heating device 1, as shown in FIG. A middle heater 13 arranged on the left and right inside, a control unit 15 for controlling the heaters 11, 12, 13, etc., a micro heating unit 16, and a power supply unit 17 for supplying power to each unit and each part. Prepare. Note that the middle heater 13 is provided between the upper heater 11 and the lower heater 12 in the vertical direction.

(1) Housing The housing 10 here has a rectangular parallelepiped shape and has an inner wall 100 and an outer wall 101 . The inner wall 100 constitutes the cooking chamber 3 on the side of the heating device 1 in the cooking chamber 3 composed of the heating device 1 and the door 5 . An inner wall 100 is provided with upper and lower heaters 11 and 12 and a middle heater 13 , and a control unit 15 , a power supply unit 17 and the like are provided between the inner wall 100 and the outer wall 101 .

The inner wall 100 has an inner upper wall portion 100a, an inner lower wall portion 100b, an inner right wall portion 100c, an inner left wall portion 100d and an inner rear wall portion 100e. In addition, in order to distinguish from the wall portion of the outer wall 101, the wall portion of the inner wall 100 and the wall portion of the outer wall 101 are respectively referred to as “inside” and “outside” for convenience.
An upper heater 11 is provided above the cooking chamber 3 . Here, an upper heater 11 is provided on the inner upper wall portion 100a. As shown in FIG. 4, the inner upper wall portion 100a is recessed upward from the peripheral portion, and the upper heater 11 is arranged in the recessed portion 100f. The inner upper wall portion 100a is provided with a cover 105 for preventing contact with a user's hand, the tray 7, an object to be heated, and the like.
A lower heater 12 is provided below the cooking chamber 3 . Here, a lower heater 12 is provided on the inner lower wall portion 100b. As shown in FIG. 4, the inner lower wall portion 100b is recessed downward from the peripheral portion, and the lower heater 12 is arranged in the recessed portion 100g. A glass table 106 covering the recessed portion 100g is provided on the inner lower wall portion 100b, and the lower heater 12 is arranged in a space formed by the recessed portion 100g and the glass table .
Between the inner lower wall portion 100b and the glass table 106, the rotating antenna 161 of the micro-heating unit 16 is arranged. The magnetron and the like of the micro heating unit 16 are arranged below the inner lower wall portion 100b.

The inner right wall portion 100c and the inner left wall portion 100d have support portions 100j that support the tray 7 in multiple stages (two stages). The support portion 100j may have a groove shape into which the left and right ends of the tray 7 are inserted, or may have a ridge shape that supports the left and right ends of the tray 7 from below. Here, it is configured by a protrusion extending inward in the left-right direction and extending in the front-rear direction. Also, here, the ridges are provided at intervals in the vertical direction. That is, two protrusions are provided on each of the inner right side wall portion 100c and the inner left side wall portion 100d.
Middle heaters 13 are provided on both left and right sides of the cooking chamber 3 . Here, middle heaters 13 are provided on the inner right side wall portion 100c and the inner left side wall portion 100d. As shown in FIG. 5, the inner right side wall portion 100c and the inner left side wall portion 100d have recessed portions 100k that are recessed outward in the horizontal direction between upper and lower support portions 100j. The middle heater 13 is accommodated in the recessed portion 100k.

The outer wall 101 has an outer upper wall portion 101a, an outer lower wall portion 101b, an outer right wall portion 101c, an outer left wall portion 101d, an outer rear wall portion 101e, and an outer front wall portion 101f. Between the outer lower wall portion 101b and the inner lower wall portion 100b, main parts of the micro heating unit 16, the control unit 15, the power supply unit 17, etc. are provided.
The outer front wall portion 101f is provided so as to cover the gap between the outer wall 101 and the inner wall 100. As shown in FIG.

(2) Heater (2-1) Upper heater As the upper heater 11, for example, a quartz tube heater is used. Here, as shown in (a) of FIG. 3, a plurality of (for example, three) rod-shaped quartz tube heaters extending in the left-right direction are spaced in the front-rear direction as shown in (a) of FIG. distributed.
The upper heater 11 is arranged in a recessed portion 100f of the inner upper wall portion 100a of the housing 10 and covered with a cover 105, as shown in FIG. The cover 105 is configured by arranging a plurality of bars extending in the left-right direction or the front-rear direction at intervals in the front-rear direction or the left-right direction.

(2-2) Lower Heater The lower heater 12 uses, for example, a quartz tube heater and has a rectangular annular shape as shown in FIG. 3(b). The lower heater 12 is arranged in a recessed portion 100g of the inner lower wall portion 100b of the housing 10 and covered with a glass plate (table) 106, as shown in FIG.

(2-3) Middle Heater The middle heater 13 can use, for example, a quartz tube heater, a sheathed heater, a mica heater, etc. Here, a plate-shaped mica heater is used. More specifically, it utilizes a mica heater coated with a galvanic steel plate.
The middle heater 13 is provided between the upper heater 11 and the lower heater 12 in the vertical direction. As shown in FIG. 5, the middle heater 13 is arranged such that at least a portion thereof is positioned within the recessed portion 100k of the inner right side wall portion 100c or the inner left side wall portion 100d. Thereby, the inside of the cooking chamber 3 can be widened. Here, the entire middle heater 13 is arranged within the recessed portion 100k. As a result, the middle heater 13 does not protrude from the recessed portion 100k into the cooking chamber 3, and contact with the tray 7 and the food to be cooked can be prevented. Moreover, the inside of the cooking chamber 3 can be widened.

The middle heater 13 is provided between the upper support portion 100j and the lower support portion 100j. As a result, variations in temperature in the cooking chamber 3 can be reduced, and multistage cooking with less uneven baking is possible.
As shown in FIG. 5, the middle heater 13 is arranged between the tray 7 supported by the upper support portion 100j and the tray 7 supported by the lower support portion 100j. In other words, when the inner right side wall portion 100c or the inner left side wall portion 100d is viewed from the left-right direction, at least part of the middle heater 13 is arranged to be visible. Thereby, heat from the middle heater 13 is efficiently conducted to the tray 7 . In particular, here, the middle heater 13 is all arranged so as not to be hidden (visible) by the upper and lower trays 7 when viewed in the horizontal direction. As a result, the heat from the middle heater 13 is conducted to the tray 7 more efficiently.
The recessed portion 100k is elongated in the front-rear direction (rectangular when viewed from the left and right), and the middle heater 13 is plate-shaped and has a rectangular shape when viewed from the left and right. . The middle heater 13 is arranged such that its thickness direction is the horizontal direction and its longitudinal direction is the front-rear direction. Thereby, temperature unevenness in the front-rear direction in the cooking chamber 3 can be reduced.
The middle heater 13 is covered with a cover 107 from the cooking chamber 3 side. Thereby, the user can be prevented from directly touching the middle heater 13, and the safety can be improved. The cover 107 has a mesh shape, and is formed by connecting a plurality of bars in the front-rear direction and a plurality of bars in the vertical direction in a grid pattern.

(3) Micro Heating Unit As shown in FIG. 4, the micro heating unit 16 includes a rotating antenna 161 rotatably supported, a motor 162 for rotating the rotating antenna 161, a magnetron 163 for generating microwaves, A waveguide 164 for guiding the generated microwave to the rotating antenna 161 side, a high-voltage transformer 165 for the magnetron 163, and the like are provided.
As described above, the rotating antenna 161 is arranged between the inner lower wall portion 100b and the glass table 106, and the motor 162, the magnetron 163, the waveguide 164, and the high-voltage transformer 165 are arranged between the inner lower wall portion 100b and the outer wall portion 100b. It is arranged between the lower wall portion 101b.

(4) Power supply unit The power supply unit 17 generates electric power required by the heating cooker X. FIG. The power supply unit 17 is composed of a plurality of electronic components and a power supply board on which these are mounted, and constitutes, for example, a rectifier circuit, a smoothing circuit, a transformer circuit, a current transformer circuit, and the like. The power supply unit 17 is arranged between the inner lower wall portion 100b and the outer lower wall portion 101b.

(5) Control Unit The control unit 15 drives the heaters 11, 12, 13 and the micro heating unit 16 in accordance with the operation of the operation section 53 by the user, and executes a program corresponding to the cooking contents selected by the user. or display the remaining cooking time or the selected program on the display unit 54, or the like.
The control unit 15 includes a control section composed of a microcomputer or the like, a storage section for storing programs corresponding to a plurality of automatic cooking menus and various data in advance, and a timer for counting time. The control unit 15 is composed of a plurality of electronic components, which are mounted on a control board. The control unit 15 is arranged between the inner lower wall portion 100b and the outer lower wall portion 101b.

3. Door The door 5 is rotatably supported around a vertical axis or a horizontal axis, as shown in FIG. Here, the lower side is supported by the left-right shaft.
The door 5 includes a door body 51 , a handle portion 52 provided on the door body 51 , and an operation portion 53 and a display portion 54 provided on the door body 51 .
The operation unit includes an operation portion 53 such as buttons and dials, and the operation board and the like are provided so as to be positioned inside the door body 51 . By operating the operation part 53, the user can heat the object to be heated and cook the object to be cooked manually or automatically.
The display unit includes a display unit 54 for assisting (guiding) the user's operation, displaying selection contents, displaying time, temperature, etc., and notifying that it is in operation. The board and the like are arranged inside the door body 51 .

4. Tray The tray 7 has a rectangular shape elongated in the left-right direction when viewed from above. The tray 7 includes a flat plate portion 71 having a rectangular shape or a shape similar to a rectangular shape, side plate portions 73 extending upward from the periphery of the flat plate portion 71, and flanges extending from the upper edge of the side plate portion 73 in the left-right direction or the front-rear direction. and a plate portion 75 . Here, the tip of the flange plate portion 75 is rounded downward.
The flange plate portion 75 is supported by the support portion 100j of the heating device 1 by contacting the upper surface of the support portion 100j with the lower surface thereof.

5. About Middle Heater The middle heater 13 shown in FIG. 5 is provided so as to be positioned entirely within the recessed portion 100k of the inner right side wall portion 100c and the inner left side wall portion 100d. As shown, it may be provided on the flat portion 2100n of the inner wall 2100 (the inner left side wall portion 2100d). Here, using a cover 2107 that accommodates (supports) the middle heater 13, it is attached to the inner surface of the inner wall 2100 (inner left side wall portion 2100d). As a result, the middle heater 13 is brought closer to the upper and lower trays 7, and thermal conductivity can be improved. At least a part of the middle heater 13 is visible when viewed from the left and right, and the entirety is visible here.
Although the middle heater 13 of the inner left side wall portion 2100d has been described here, the middle heater 13 may be similarly provided for the inner right side wall portion, or the middle heater may be provided with a different structure. .

Although the middle heater 13 shown in FIG. 5 is completely accommodated in the recessed portion 100k, it may be accommodated partially projecting from the recessed portion 100k. In addition, as shown in FIG. 7, the inner wall 3100 (inner left side wall portion 3100d) has a through hole 3100m between the upper support portion 3100j and the lower support portion 3100j. An intermediate heater 13 may be provided inside or outside (in this case, outside) the chamber 3 . In this case, a cover 3107 that accommodates (supports) the middle heater 13 can be used to attach it to the inner wall 3100 (inner left side wall portion 3100d). At least a part of the middle heater 13 is visible when viewed in the left-right direction, and the upper and lower ends are hidden here.
Although the middle heater 13 of the inner left side wall portion 3100d has been described here, the middle heater 13 may be similarly provided for the inner right side wall portion, or the middle heater may be provided with a different structure. .

The middle heater 13 shown in FIGS. 5 to 7 uses a mica heater, but as shown in FIG. 8, a quartz tube heater may be used. A configuration using a quartz tube heater as the middle heater 4013 will be described with reference to FIG.
The inner wall 4100 (inner left side wall portion 4100d) has a recessed portion 4100k that is recessed outward in the horizontal direction corresponding to the middle heater 4013 . The middle heater 4013 has a tubular shape elongated in the front-rear direction. One or a plurality of medium heaters 4013, here, two are provided. The two middle heaters 4013 are separated vertically.
The two middle heaters 4013 are provided such that at least a portion thereof is located in the recessed portion 4100k. In FIG. 8, about 3/4 of the middle heater 4013 is positioned within the recessed portion 4100k. In a cross section perpendicular to the front-rear direction, the larger the area of the middle heater 4013 located within the recessed portion 4100k, the wider the interior of the cooking chamber 3 can be, while the middle heater 4013 is closer to the outer wall, and in some cases, heat insulation measures are required. becomes. Conversely, the smaller the area of the middle heater 4013 located within the recessed portion 4100k, the narrower the interior of the cooking chamber 3 and the farther the middle heater 4013 is from the outer wall, making heat insulation measures unnecessary.
The recessed portion 4100k is provided with a shielding portion for shielding the heat rays radiated upward or downward from the middle heater 4013. A shielding plate 4108 having portions is utilized. As a result, heat rays emitted from the middle heater 4018 can be reflected into the cooking chamber 3 and prevented from being transmitted to the side of the recessed portion 4100k and the side of the outer wall, thereby improving heat efficiency.
The middle heater 4013 here is covered with a cover 4107 composed of a plurality of protective bars. Although the middle heater 4013 of the inner left side wall portion 4100d has been described here, the middle heater 4013 may be similarly provided for the inner right side wall portion, or the middle heater 4013 may be provided with a different structure. Alternatively, other types of medium heaters such as sheathed heaters may be provided.

Although the embodiment has been described above, the present invention is not limited to this embodiment. For example, the following modifications may be made. Also, the embodiment may be combined with a modified example, or a combination of modified examples.
In addition, examples not described in the embodiments and modifications, and design changes that do not deviate from the scope of the present invention are also included in the present invention.

<Modification>
1. Heat Cooker The heat cooker X may or may not include the micro heating unit 16 . If the micro-heating unit 16 is not provided, the glass table 106 may be omitted.
The heating cooker X may or may not include a convection fan and heater.
The heating cooker X has a door 5 that opens and closes the front opening of the heating device 1 and is rotatable about a horizontal axis (a so-called vertical opening type), but the door can be rotated about a vertical axis. It may be movably provided (so-called lateral opening type).

2. Upper Heater and Lower Heater Although the upper heater 11 and the lower heater 12 used quartz tube heaters, sheathed heaters or mica heaters may be used, or a plurality of types of heaters may be used.
In the embodiment, the three upper heaters 11 are arranged at intervals in the front-rear direction. good too. In the case of one, it may be tubular, annular, or "U" shaped.
Although one annular lower heater 12 is provided in the embodiment, a plurality of tubular heaters like the upper heater 11 may be provided. Although the lower heater 12 is arranged below the glass table 106 , it may be arranged above the glass table 106 .

3. Middle Heater In the embodiment, the middle heater 13 is arranged between the two trays 7 in the vertical direction.
In the embodiment, the middle heater 13 is provided on the inner right side wall portion 100c and the inner left side wall portion 100d. For example, middle heaters 13 may be provided alternately on the left and right between trays 7 of three or more stages.
Although one mica heater extending in the front-rear direction is used as the middle heater 13, for example, a plurality of heaters may be arranged in the front-rear direction. In this case, there may be a gap between the front and rear heaters, or the ends may overlap each other.
In the embodiment, the direction orthogonal to the vertical direction is the direction orthogonal to the vertical direction and the front-rear direction (horizontal direction), but it may be the direction orthogonal to the vertical direction and the horizontal direction (front-rear direction). . In this case, it can be implemented by providing it on the door 5 .
The middle heater 13 is directly provided on the inner right side wall portion 100c and the inner left side wall portion 100d that constitute the cooking chamber 3. It may be provided in any one of the portion 100d, the inner upper wall portion 100a, the inner lower wall portion 100b, and the inner rear wall portion 100e.

4. Tray The plurality of trays 7 may have the same configuration or may have different configurations.
The tray 7 may have a reflecting function on the outer surface (lower surface) of the flat plate portion 71 . As a result, the radiant heat emitted from the middle heater 13 is reflected downward by the reflecting function, so that the foodstuffs placed on the lower tray can be heated more efficiently than when there is no reflecting function. For the reflecting function, for example, a reflecting plate may be provided, or the outer surface may be mirror-finished or coated to form a reflecting surface. In this case, the plurality of trays 7 may be provided with the reflecting function, or the upper tray may be provided with the reflecting function. In order for the user to know that the tray is on the upper side, the flat plate portion may be provided with a recess or the like indicating "upper" or the like, or the tray may be configured so that it can only be installed on the upper tray.

1 heating device 5 door 7 tray 11 upper heater 12 lower heater 13 middle heater

Claims (7)

In a heating cooker having a cooking chamber inside,
an upper heater arranged above the cooking chamber;
a lower heater arranged on the lower side of the cooking chamber;
a middle heater disposed between the upper heater and the lower heater on at least one side of both sides in a direction perpendicular to the vertical direction in the cooking chamber,
heating cooker. The middle heater is provided on a flat portion of the side wall portion that constitutes the cooking chamber,
The heating cooker according to claim 1. The middle heater is provided in a recessed portion that is recessed outward in the orthogonal direction in the side wall portion that constitutes the cooking chamber,
The heating cooker according to claim 1. The middle heater is a mica heater,
The heating cooker according to any one of claims 1 to 3. The middle heater is a quartz tube heater or a sheathed heater,
The heating cooker according to any one of claims 1 to 3. Equipped with a shielding plate that shields heat rays emitted upward or downward from the middle heater,
The heating cooker according to claim 5. Trays are configured to be arranged in multiple stages in the vertical direction in the cooking chamber,
The middle heater fits between the two vertically adjacent trays when viewed from the orthogonal direction.
The heating cooker according to any one of claims 1 to 6.

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