JP2006300430A - Heating cooking device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide usage of a heating grill for placing an object to be heated without risk of field discharge even in microwave heating cooking. <P>SOLUTION: The heating cooking device is provided with a heating means for providing microwave heating and heater heating with respect to an object to be heated placed on the grill 13 housed in a heating chamber 3, a bottom plate 8 of the heating chamber 3 is formed from an insulating microwave transmitting material, and a microwave is radiated into the heating chamber 3 via a turning antenna 9 arranged in its lower face. The grill 13 is comprised by providing a substantially quadrangular frame part forming an outline by machining a metal wire, a shelf part forming a flat mesh shape by horizontally laying metal wires between two opposing edges of the frame part, and a plurality of legs 16 protruding downward from the frame part or the shelf part and mounted and supported on the bottom plate 8 of the heating chamber 3. It is composed such that spacers 17 comprised of an insulating material is attached to four corners of the grill 13, and an outer circumferential rim of a protruding part formed on the spacer 17 is positioned in a more outer side than the frame part 14. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a cooking device that enables cooking by microwave heating and heater heating on an object to be heated.

  Conventionally, a composite cooking device having different heating sources by microwave heating by a magnetron and heater heating by an electric heater has been provided, and various cooking menus with an expanded repertoire can be easily realized. However, a metal grill net on which an object to be heated is placed is prepared as a dedicated accessory used for heater heating such as grill cooking. However, the grill has a risk of generating electric field (spark) when the outer periphery of the grill is in contact with the side surface of the heating chamber generally made of metal during microwave heating. When there is a possibility of contact with the chamber, the use conditions are restricted so as to be unusable during cooking by microwave heating and taken out from the heating chamber.

  For this reason, when it is desired to continue cooking with the microwave heating and the heater heating, for example, when re-heating fried foods, the microwave heating is performed after the microwave heating is performed first, and the rollers are efficiently made into “Calrit”. However, due to the above circumstances, it was not possible to use the grill net throughout the reheating process, requiring a troublesome operation for replacing with other cooking utensils on the way, and it was not easy to use.

  Moreover, in recent years, it has been devised so that the object to be heated can be directly placed on the bottom of the heating chamber itself so that the heating chamber can be used effectively. That is, until now, for example, a turntable (rotary plate) for placing an object to be heated has been provided near the bottom of the heating chamber in order to improve unevenness of heating. The upper uneven portion is eliminated, and the entire rectangular bottom of the heating chamber can be a flat bottom surface. And by making this bottom face usable as a placing surface for the object to be heated, more objects to be heated can be placed and accommodated and cooking can be performed efficiently.

However, if the grill is accommodated at a predetermined distance from the wall of the heating chamber, the phenomenon of electric discharge can be avoided. It is effective to secure the installation area, and when the grill net is accommodated, it is in a free-moving state unless special positioning means is provided, so that there is a high possibility that it will come into contact with the surroundings of the heating chamber. For this reason, while making the metal-based grill structure, the leg portions at the four corners are made of an insulating material, and the discharge between the bottom surface of the heating chamber as the mounting surface is prevented. Has been devised (see, for example, Patent Document 1).
JP 2004-239501 A

  However, according to the configuration described in Patent Document 1, the leg portion is made of the same insulating material as that of the insulator molding, but the grill net is stored in the heating chamber and is taken out and stored through the leg portion. Because of the mounting structure, the legs are always easy to receive impact, and it is possible that the grille will be dropped inadvertently. Have. Further, although the means for attaching the legs to the grill is unknown, the legs such as insulators and ceramics are limited to simple shapes and are difficult to process after molding, and the fixing means are also adhesive means. For example, there are practical problems such as difficulty in adopting strong screwing means.

  In order to solve the above-mentioned problems, the present invention has been disclosed in order to solve the above-mentioned problem. An object of the present invention is to provide a heating cooker that can be used for microwave heating while avoiding the phenomenon of electric discharge and that can easily handle a grill.

  In order to achieve the above object, a heating cooker according to the present invention includes a heating means that enables microwave heating and heater heating on an object to be heated placed on a grill net housed in a heating chamber. The bottom plate of the heating chamber is formed from an insulating microwave transmitting material, and the microwave is radiated into the heating chamber through a microwave diffuser disposed on the lower surface thereof. A substantially rectangular frame part, a shelf part that forms a flat net by crossing a metal wire between the opposing frame parts, and projects downward from the frame part or shelf part on the bottom plate of the heating chamber And a plurality of legs that are mounted and supported on the frame, and a spacer made of an insulating material is mounted at the four corners of the grill net, and the outer peripheral edge of the spacer is positioned outside the frame portion. It is characterized by It is intended.

  According to the above means, the entire grill net can be made of a metal wire, is light and easy to handle, and when accommodated in the heating chamber, its legs are placed and supported on the insulating bottom plate of the heating chamber, Further, the frame portion forming the outer shell is secured at a predetermined distance from the peripheral wall of the heating chamber by the spacer, so that there is no possibility that the grill will come into contact with the heating chamber and cause electric field discharge. As a result, the bottom plate of the heating chamber can be used in a flat configuration as a mounting surface for the object to be heated, and the grill can be used for both microwave heating and heater heating. We can provide a cooking device that can be expected.

Hereinafter, an embodiment of the present invention will be described with reference to FIGS.
First, FIG. 1 is a longitudinal front view showing a schematic configuration of a heating cooker, and an inner box 2 having a substantially rectangular box shape is provided inside a rectangular box-like outer box 1 forming an outer shell as shown in the figure. . The inner box 2 is made of metal such as stainless steel or a galvanized steel plate, and a heating chamber 3 having the same shape is formed therein. Although not shown, the outer box 1 and the front surface of the heating chamber 3 are both open so that the door can be opened and closed. In addition, a machine room 4 is formed adjacent to the right side of the inner box 2, and a magnetron 5 that oscillates microwaves, a drive control component thereof, a cooling fan, and the like are disposed, and a cooking menu, cooking time, and the like are provided on the front surface thereof. An operation panel (not shown) for setting operation is provided.

  The magnetron 5 is provided with a waveguide 7 connected to an excitation port 6 formed at the bottom of the inner box 2 in order to guide the generated microwave into the heating chamber 3. Waves can be supplied. The bottom portion of the inner box 2 has a stepped shape, and a substantially rectangular, for example, substantially square, flat plate 8 is provided on the step portion 2a. The bottom plate 8 is made of an insulating microwave transmitting material such as heat-resistant glass or ceramic material, occupies most of the bottom area of the heating chamber 3, and the periphery of the step portion 2a is sealed with silicon. The heat treatment chamber 3 is mounted with treatment, and substantially forms a flat bottom surface of the heating chamber 3.

  However, a rotating antenna 9 as a microwave diffuser and a lower heater 10 including a sheathed heater as an electric heater are disposed in a small flat space below and covered with the bottom plate 8 and divided vertically. Among them, the rotating antenna 9 reflects and stirs the microwave supplied from the excitation port 6 so that it can be widely irradiated into the heating chamber 3, and is rotated by a motor 11. On the other hand, an upper heater 12 made of, for example, a planar heater is disposed on the upper outer surface of the inner box 2 with respect to the lower heater 10, and both the upper and lower heaters 10 and 12 serve as a heater for heating an object to be heated. To do.

  A heating net 13 as an accessory is accommodated in the heating chamber 3 so as to be freely inserted and removed, and is placed and supported on the bottom plate 8 via a leg portion 16 described later. A specific configuration of the grill 13 will be described with reference to the perspective view of FIG. 2 and the exploded perspective view of the main part of FIG. The grill 13 is formed by processing such as bending and joining a metal wire, and a substantially square, in this case, a substantially square frame portion 14 that forms a shell by bending one wire, and this frame. A flat shelf 15 having a so-called net-like shape in which a plurality of linear wires are placed at a parallel interval so as to be orthogonal between two opposing sides surrounded by the portion 14; For example, the left and right outermost wires 15a and 15b are located in the vicinity of the four corners, and have leg portions 16 bent into a U shape so as to locally protrude downward.

  The net-like parallel spacing of the shelf 15 is not limited as long as the object to be heated (not shown) does not fall downward when placed on the shelf 15 and, of course, can pass microwaves. Therefore, it does not prevent the cross-like network configuration. Further, the four leg portions 16 in the present embodiment have a predetermined interval between the shelf portion 15 and the bottom surface (bottom plate 8) of the heating chamber 3, and are always on the bottom plate 8 when accommodated in the heating chamber 3. In addition to being in the placement condition for being placed and supported on the board, the heating condition for the placed object to be heated is set as a standard setting as well as being capable of being stably placed on the placement surface.

  Four heat-resistant spacers 17 that are made common to the four corners of the grill 13 configured in this way are mounted. The structure of the spacer 17 at one of the positions will be described. As shown in FIG. 3, the spacer 17 is composed of an upper spacer 17a and a lower spacer 17b, and is tightened and fixed with an overlapping screw member 20 so as to sandwich the frame portion 14. Yes. Specifically, the spacer 17 forms a fan shape along the arc-shaped portion 14 a at the corner of the frame portion 14, and the lower spacer 17 b is applied to the lower surface side of the arc-shaped portion 14 a of the frame portion 14.

  Accordingly, on the upper surface of the fan-shaped lower spacer 17b, two groove portions 18a and 18b that engage with the wire of the frame portion 14 on both sides of the arc-shaped portion 14a are provided in a positional relationship perpendicular to each other. It also functions advantageously as positioning of 17b. A groove portion 19 similar to the above is provided at one location on the inner peripheral side with respect to the two groove portions 18a and 18b on the outer peripheral side. The groove portion 19 is engaged with the wire 15b here on the outermost side of the shelf portion 15 where the leg portion 16 is formed, and the wire portion 15b is orthogonal to the opposing frame portion 14, so The lower spacer 17b is easily positioned in the circumferential direction such as right and left by the engagement of the three grooves 18a, 18b, and 19 in a positional relationship orthogonal to the groove 18a (same direction as the other groove 18b). It can be addressed without being displaced.

  On the other hand, the upper spacer 17a also has a fan-like shape that matches when overlapped with the lower spacer 17b, and has groove portions (not shown) at positions facing the three groove portions 18a, 18b, and 19 of the lower spacer 17b. 2), and is sandwiched from above and below at three points of the wire rod at the corner of the grill 13. Then, both the spacers 17 a and 17 b overlapped above and below are fastened and fixed by the screw member 20.

  As the fastening means, for example, the lower spacer 17b is formed with a through hole 21a penetrating substantially at the center thereof and a large-diameter recess 21b at the upper portion thereof, while a boss portion (not shown) is provided downward on the upper spacer 17a. A protruding boss hole 22 is provided at the opposite position. Then, a superimposition that also serves as positioning is performed by fitting a boss portion (not shown) into the recess 21b, and the screw member 20 is screwed into the boss hole 22 from below through the through hole 21a, thereby tightening both. The spacer 17 is fixed to the corner of the grill 13.

  However, in the spacer 17 attached to the four corners of the grill 13 as described above, the outer peripheral edge is positioned outside the frame portion 14. That is, since the fan-shaped spacers 17a and 17b sandwich the vicinity of the arcuate portion 14a of the frame portion 14, the outer peripheral edge is located slightly outside the frame portion 14, but it is larger. An arc-shaped and hook-shaped protrusion 23 protruding outward is formed on the upper spacer 17a. Thus, the arc-shaped outer peripheral edge formed by the protrusion 23 is formed so as to have a predetermined interval S (see FIG. 2) in the horizontal direction with respect to the frame portion 14. As will be described in detail later, the peripheral wall of the heating chamber 3 is consequently obtained. As a result, it is possible to secure an arrangement state in which the separation corresponding to the interval S is at least in the horizontal direction.

  The spacer 17 having the above structure may be any material that can withstand heater heating that originally uses the grill 13, but in this embodiment, a material that should be usable for microwave heating, such as polyphenylene sulfide (hereinafter referred to as “polyphenylene sulfide”). Engineering plastic such as PPS) is adopted. This PPS has low high-frequency loss and excellent heat resistance, and can be injection-molded. For example, as shown in FIG. 3, a letter A indicating the arrangement direction, for example, “up” is raised on the surface of the upper spacer 17a. It is carved together. Moreover, it has been confirmed that a heat distortion temperature of 260 ° C. or higher can be expected by using PPS containing glass filler, and it can sufficiently withstand high-temperature heater heating even though it is the above-mentioned plastic.

Next, the operation of the cooking device configured as described above will be described.
In the cooking device shown in the present embodiment, microwave cooking using the magnetron 5 as a heating source or heating the upper and lower heaters 12 and 10 as a heating source based on a setting operation of a heating mode or cooking menu on an operation panel (not shown). The heater heating cooking is performed, and pre-programmed heating control is executed. Furthermore, it is possible to perform heating cooking in which heating is performed after microwave heating. For example, in the case of reheating a deep-fried food, first, the heater is heated quickly after being heated by microwave heating. This is effective when finishing “Kalit” in a dry state.

  Then, when it demonstrates about the reheating cooking which performs the said different heating source continuously, the fried food which is a to-be-heated material which is not shown in figure is mounted on the grill 13, and it accommodates in the heating chamber 3. FIG. At this time, “upper” is written as the letter A indicating the arrangement direction on the spacer 17, and it is arranged at an appropriate upper and lower storage position by visually recognizing this. The bottom plate 8 forming the substantial bottom surface of the heating chamber 3 is flat so that the grill 13 is accommodated in a free-moving state. In this embodiment, the bottom of the heating chamber 3 and the grill 13 are Since it is a substantially square, it can be accommodated without any restrictions on the directionality in the circumferential direction. First, microwave heating by the magnetron 5 is performed.

  However, the spacers 17 mounted at the four corners secure a predetermined distance S between the outer peripheral edge and the frame part 14 as disclosed in FIG. Even when one of 17 is in contact with the peripheral wall of the heating chamber 3, the closest distance between the peripheral wall and the frame portion 14 of the grill 13 is kept at a position that is at least separated by the distance S. Therefore, by setting the interval S to an interval size that does not cause a discharge phenomenon, the spacer 17 maintains a predetermined interval that does not discharge the peripheral wall of the heating chamber 3 even if the grill 13 freely moves on the bottom plate 8. To do. Moreover, since the spacer 17 is made of engineering plastic such as PPS, the high frequency loss is small and unnecessary heating of the spacer 17 during microwave heating can be prevented.

  On the other hand, even if one of the spacers 17 is in an offset storage state in contact with the peripheral wall of the heating chamber 3 as described above, the leg portion 16 of the grill 13 is placed without coming off the bottom plate 8. It is in a supported state. For this reason, the discharge phenomenon with the heating chamber 3 in the metal leg part 16 part is also avoided through the bottom plate 8 made of heat-resistant glass having insulating properties. Further, since the net-like shelf portion 15 does not prevent the passage of microwaves, the object to be heated is also well irradiated, and thus the microwave heating that has been inappropriately used in the conventional grill net 13 is achieved. Can be used without any problem. In addition, in the conventional microwave heating, since a plate-shaped mounting table is used for this reheating, the oil content from the object to be heated accumulates, which is absorbed by the rollers and the taste and finished state are deteriorated. However, according to the present embodiment, the oil can be dropped from the grill 13.

  Then, after microwave heating for a predetermined time is performed and the object to be heated is quickly heated, the heaters are heated by the upper and lower heaters 12 and 10, so that the so-called fried food rollers are finished in a “kalrit”. However, although the spacer 17 is an engineering plastic, it has excellent heat resistance. In particular, a PPS containing glass filler can have a heat distortion temperature of 260 ° C or higher, and can sufficiently withstand high-temperature heating by heater heating. High temperature heater heating is performed well.

As described above, the present embodiment has the following effects.
Since heating means for microwave heating and heater heating are provided and the microwave can be supplied while stirring and radiating from the bottom of the heating chamber 3, the bottom surface of the heating chamber 3 can be formed by the flat bottom plate 8. Therefore, the inside of the heating chamber 3 can be effectively utilized by accommodating a large number of objects to be heated or improving the cleaning property. In addition, since the bottom plate 8 is formed of an insulating microwave transmitting material, the grill 13 made of a metal wire as an accessory placed on the upper surface via the leg portion 16 is accommodated without inducing electric field discharge. it can. In addition, the frame portion 14 that forms the outline of the grill 13 is safe because a predetermined distance that does not cause electric field discharge can be secured with the peripheral wall of the heating chamber 3 by the spacers 17 attached to the corners.

  As a result, by using the grill 13 on which the object to be heated is placed, it can be used for both microwave heating and heater heating by different heating sources, and the grill 13 such as reheating cooking using both heating means. Therefore, the cooking can be continued without replacement, and it is practically extremely effective without requiring a complicated operation. In addition, the bottom plate 8 of the heating chamber 3 has a flat configuration and can be widely used as a surface for placing an object to be heated. In addition, the operation of putting the net 13 in and out of the heating chamber 3 can be performed without any particular attention. Can be handled easily.

  In addition, since engineering plastic is used as the material of the spacer 17, the high frequency loss is small and the heat resistance is excellent, and the injection molding is possible. 13 can be formed with high accuracy and shape difficult to be formed with ceramics, such as the shape and configuration of being joined together so as to sandwich 13 and the fastening means using the screw member 20, and injection like a general plastic material Since the forming is possible, the degree of freedom in design is high, and as a means for attaching to the grill 13, for example, a spacer 17 structure that is clamped at three points of the metal wire constituting the grill 13 is used. Since positioning and reliable fixing means can be selected as appropriate, it is extremely effective for practical use.

  And the letter A which shows the arrangement direction was described using the spacer 17. For example, the “upper” character can be used to prevent misuse of the upside down of the grill 13, and an unexpected failure associated with an incorrect accommodation arrangement, for example, the heating conditions in the heating chamber 3 are different. Accordingly, it is possible to prevent an unexpected situation such as abnormal heating due to electric field concentration on the spacer 17 resulting from electric field distribution. In addition, since the letter A can be shaped to float, it can be displayed without disappearing even if it is exposed to heat, steam, or the like during long-term use.

  However, in the present embodiment, the entire grill 13 can be manufactured with a metal wire, is inexpensive, lightweight and easy to handle, and there is no fear that the legs 16 always placed and supported will be lost. Can be used for a long time as an accessory. Not only that, the net-like shelf 15 can drop excess oil from the object to be heated, and there is no risk of absorbing the oil and deteriorating the finishing effect, which is particularly suitable for reheating cooking such as fried foods. To do.

  The present invention is not limited to the embodiment described above and shown in the drawings. For example, the spacer is formed with an arc-shaped protrusion so as to maintain a predetermined distance from the peripheral wall of the heating chamber. Any structure can be used as long as the gap can be maintained, and when an engineering plastic material is used, it can be easily molded into various shapes by injection molding. In addition, various modifications can be made without departing from the gist of the present invention, for example, the structure of the grilled wire made of a metal wire can be modified as appropriate.

The longitudinal front view of the heating cooker which shows one Example of this invention Perspective view of grill Exploded perspective view of the main part

Explanation of symbols

In the drawings, 1 is an outer box, 2 is an inner box, 3 is a heating chamber, 5 is a magnetron, 8 is a bottom plate, 9 is a rotating antenna (microwave diffuser), 10 is a lower heater, 12 is an upper heater, and 13 is a grill. A net, 14 is a frame, 15 is a shelf, 16 is a leg, 17 is a spacer, 17a is a lower spacer, 17b is an upper spacer, and 23 is a protrusion.

Claims (3)

Heating means that enables microwave heating and heater heating to the object to be heated placed on the grill accommodated in the heating chamber, and the bottom plate of the heating chamber is made of an insulating microwave transparent material. In the one that radiates the microwave into the heating chamber through the microwave diffuser disposed on the lower surface thereof,
The grill has a substantially rectangular frame portion formed by processing a metal wire, a shelf portion that forms a flat net by horizontally laying the metal wire between the opposing frame portions, and the frame portion or the shelf portion. A plurality of legs projecting downward and mounted and supported on the bottom plate of the heating chamber, and spacers made of an insulating material are attached to the four corners of the grill, and the outer peripheral edges of the spacers are A cooking device characterized by being configured to be located outside the frame portion.   The cooking device according to claim 1, wherein the spacer is made of engineering plastic. The cooking device according to claim 1 or 2, wherein the spacer indicates the arrangement direction of the grill net in the heating chamber.

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