JP2010054154A - Cooker for high-frequency heating and high-frequency heating device using the same - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent melting of an insulator between a metallic heating chamber wall surface and a metallic cooking tray which results from concentration of high-frequency wave to a narrow part between metals. <P>SOLUTION: The cooker for high-frequency heating is equipped with: a heating chamber for housing a heating object, which includes a metallic wall; a metallic cooking tray for placing the heating object, which includes a holding part including an insulator provided on an outer circumferential part thereof; a tray receiving shelf which is engagingly locked with the holding part to set the cooking tray in a predetermined position within the heating chamber; and a heating means for heating the heating object and the cooking tray. The cooking tray is set in the predetermined position in such a manner that a space is provided between the outer circumferential part of the cooking tray and the wall surface, a portion adjacent to the cooking tray of the holding part has a space from the wall surface, and a portion not adjacent to the cooking tray of the holding part contacts with the wall surface. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a cooking utensil used in a high-frequency heating device, and more specifically to a cooking dish that generates heat by microwaves and cooks food.

In recent years, in addition to the function of heating food by irradiating food with microwaves, a high-frequency heating apparatus has a cooking dish in which a heating element that absorbs microwaves and generates heat is applied in the heating chamber. A food having a function of placing a food on the top and cooking the food with heat from a heating element is widely used (for example, see Patent Document 1).
JP 2006-97988 A

  However, in the conventional structure, the insulator which comprises the holding | maintenance part of the wall surface of a heating chamber and the outer peripheral part of a cooking pan exists between a metal heating chamber wall surface and a metal cooking pan. A part of the high frequency supplied from the bottom surface of the heating chamber reaches the upper part of the cooking plate through the gap between the cooking plate and the wall surface of the heating chamber, and is absorbed by the heated object on the cooking plate.

  If the user accidentally starts cooking without placing an object to be heated, the high-frequency waves that reach the top through the gap between the cooking pan and the wall of the heating chamber are reflected in the upper space because there is no object to be heated to be absorbed. To do. A part of the high-frequency waves again propagates under the cooking pan through the gap between the cooking pan and the heating chamber wall.

  In this way, when a high frequency is gathered in a portion where the distance between the metals is narrow, the reflection of the high frequency is repeated and the electric field concentrates, and the insulator between the metal heating chamber wall and the metal cooking pan concentrates on the electric field. The temperature rises due to heating. If high-frequency output is continued in this state, the temperature of the insulator exceeds its heat resistance temperature, and there is a problem that the insulator may melt.

  In order to solve the above-described conventional problems, a cooking utensil for a high-frequency heating device according to the present invention includes a heating chamber configured of a metal wall and containing an object to be heated, and a holding unit configured of an insulator on an outer peripheral portion. A metal cooking dish on which the object to be heated is placed, and a dish receiving shelf in which the cooking dish is installed at a predetermined position in the heating chamber by being engaged with the holding unit; A cooking utensil for a high-frequency heating device provided with a cooking means and a heating means for heating the cooking dish, and when the cooking dish is installed at the predetermined position, the outer peripheral portion of the cooking dish and the wall surface There is a space in between, the portion of the holding portion that is close to the cooking dish has a space between the wall surface, and the portion of the holding portion that is not close to the cooking plate is in contact with the wall surface. is there.

  According to the cooking utensil for the high-frequency heating device of the present invention, since the holding portion made of the resin is not provided in the space where the electric field between the metal constituting the cooking dish and the metal wall surface is strong, the holding in this space Melting of the part can be prevented.

1st invention is provided with the heating chamber which comprises a to-be-heated material comprised by the metal wall surface, and the holding | maintenance part comprised by the insulator on the outer peripheral part, and the metal cooking which mounts the said to-be-heated material A dish and a dish receiving shelf in which the cooking dish is installed at a predetermined position in the heating chamber by being engaged with the holding unit, and a heating means for heating the object to be heated and the cooking dish. When the cooking plate is installed at the predetermined position, a space is provided between the outer peripheral portion of the cooking plate and the wall surface, and the cooking plate of the holding unit is The portion adjacent to the wall has a space between the wall surface, and the portion of the holding portion not adjacent to the cooking pan is in contact with the wall surface.

  Thereby, the fusion | melting which arises when a holding | maintenance part is heated by the electric field concentration between a metal cooking pan and a metal wall surface can be prevented.

  In a second aspect of the invention, in particular, in the first aspect of the invention, a bent portion is provided on an outer peripheral portion of the cooking plate, and a portion of the holding portion adjacent to the cooking plate is below the bent portion of the cooking plate or It is provided so that it may be located inside.

  Thereby, while preventing the gap | interval which a user pinches | interposes a nail | claw between the front-end | tip of the bending part of a cooking pan and the cooking tray of a holding | maintenance part can be prevented, such a clearance gap arises. Not having the effect of enhancing aesthetics.

  In a third aspect of the invention, in particular, in the first or second aspect of the invention, the heating means is a high frequency generation means for generating microwaves, and the cooking dish has a heat generating layer that generates heat by absorbing the microwaves. It is. Thereby, even when the user actively heats the cooking dish by high frequency heating, melting can be prevented.

  In a fourth aspect of the invention, in particular, in the first or second aspect of the invention, the heating means is high frequency generating means for generating microwaves, and the cooking dish is a metal square dish. As a result, even when a square plate for heating the heater is placed in the heating chamber and high-frequency heating is performed by mistake, it is possible to prevent sparks and melt the holding portion.

  5th invention is the high frequency heating apparatus provided with the cooking utensil for high frequency heating apparatuses concerning any one invention of 1st to 4th especially. Thereby, a safer high-frequency heating device can be realized.

  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)
FIG. 1 is a cross-sectional view from the front direction of a cooking device according to an embodiment of the present invention. The heating cooker is heated by a heating chamber 1 containing food, a door (not shown) for opening and closing the front opening of the heating chamber 1, and a control unit (not shown) built in the heating cooker body. A control panel (not shown) for setting conditions and instructing the start of heating is provided.

  Below the bottom surface of the heating chamber 1, there are two rotating antennas (left antenna 4a and right antenna 4b) that radiate a high frequency supplied from a magnetron 2 that generates a high frequency through a waveguide 3 as a high frequency supply unit. ) Built-in high-frequency waves radiated from these rotating antennas are supplied into the heating chamber 1 through a ceramic food table 5 that transmits high-frequency waves.

  High frequency heating is performed by supplying high frequency into the heating chamber 1. The left antenna 4a and the right antenna 4b are rotated by motors 6a and 6b arranged on the back surface of the lower waveguide 3, respectively. A heater 7 that generates radiant heat and heats food when energized is disposed in the upper portion of the heating chamber 1, and heater heating by the heater 7 is performed.

  Further, on the left side surface and the right side surface of the heating chamber 1, there are formed slide rails 9 for sliding a metal cooking pan 8 used for cooking and placing it at a predetermined position in the heating chamber 1, When the cooking dish 8 is placed on the slide rail 9, a predetermined space is formed between the cooking dish 8 and the food placing table 5.

  The cooking dish 8 includes a dish body 8a and a flange portion 8b. This dish main body 8a is mainly composed of iron or aluminum having an uneven cross section, and the upper surface is coated with a fluorine resin. The flange portion 8b is provided on the outer peripheral portion of the cooking pan 8 so as to protrude upward and outward in an inverted L shape, and has a curled bent portion 8c at the tip thereof so that the user does not cut his / her hand.

  The lower surface of the cooking pan 8 has a heat generating layer 8d coated with a high frequency absorption heating element such as ferrite that absorbs the high frequency from the magnetron 2 and generates heat, and is placed on the upper surface by the heat of the heat generating layer 8d. While heating a to-be-heated object, a part of high frequency which passed through the clearance gap between the cooking pan 8 and the wall surface of the heating chamber 1 reaches a to-be-heated object, and high frequency heating is performed.

  Further, a holding portion 10 made of an insulating material such as a heat-resistant resin is provided on the flange portion 8b provided on the outer peripheral portion of the cooking pan 8, and the holding portion 10 slides on the slide rail 9 so that cooking is performed. The dish 8 is placed at a predetermined position in the heating chamber 1.

  The holding portion 10 is configured such that the concave portion 10a is sandwiched between the wall surface of the heating chamber 1 and the flange portion 8b of the cooking pan 8, and does not exist in the space 15 where electric field concentration is likely to occur. In addition, the holding part 10 is located under or inside the bent part 8c of the flange 8b (on the side far from the wall surface of the heating chamber 1) so that the user's nails are not caught in the gap between the concave part 10a and the cooking pan 8. ).

  Then, when the cooking pan 8 is placed at a predetermined position in the heating chamber 1, the holding portion 10 has an outer side (on the wall surface of the heating chamber 1) so that play does not occur on the left and right of the cooking pan 8. A protruding portion 10b that protrudes to the near side is provided.

  Furthermore, the holding part 10 is provided with a leg part 10c. This is to prevent the hot portion from coming into direct contact with the table when the cooking pan 8 is removed from the heating chamber 1 and placed on the table, and when the user uses heat-resistant gloves such as mittens. But to make it easier to hold a cooking dish.

  FIG. 2 is an external perspective view of the high-frequency heating device in the present embodiment. In FIG. 2, an operation unit 12 that performs menu selection, an instruction to start heating, and the like, and a display unit 13 that displays the selected menu and heating time are provided below the door 11.

  Next, the operation and action of the high-frequency heating device of the present invention having the above configuration will be described. As an example of the menu using the cooking pan 8 with a high-frequency heating element, “Akito fish grilled with salt” will be described as an example.

  In order to give a firm burnt color to the front and back of the sword fish that is the object to be heated, it is desirable to cook in a short time with high heating power. In the high-frequency heating device in the present embodiment, for example, first, heating is performed for 10 minutes at a high frequency of 800 W output. During high-frequency heating, the left antenna 6a that stirs the high frequency continues to rotate, and the right antenna 6b rotates after stopping for 20 seconds at a predetermined position, and is controlled to repeat the operation of stopping for 20 seconds at the predetermined position. The

Thus, the control pattern of the antenna is stored in advance in the control means so that appropriate heating according to the menu can be performed. After the high-frequency heating for 10 minutes is completed, the high-frequency heating is switched to the heater heating, and radiant heating is performed by the upper heater 7 for another 10 minutes. In this way, the thermal power setting is stored in advance in the control means so that the front and back of the sword sword fish are burnt in a total of 20 minutes.

  Since the control means only performs the heating control with the stored setting in accordance with the selected menu, it cannot be determined whether or not the fish to be heated is placed on the cooking plate.

  Therefore, the cooking dish having the conventional configuration, that is, the cooking dish having the configuration in which the concave portion 10a of the holding unit 10 is sandwiched between the wall surface of the heating chamber 1 and the outer peripheral portion of the cooking dish 8 and exists in a space where electric field concentration is likely to occur. If you start cooking by selecting “Akito Fish Salt Grilled” with no sword fish on top (empty baked), you will feel a strange odor after 7 minutes, and when you take out the cooking dish, the outer peripheral holding part will melt. It was confirmed that At this time, the temperature of the holding unit 10 reached 270 ° C.

  As the holding unit 10, a heat-resistant resin PPS is used, and the heat-resistant temperature of PPS is 260 ° C., which means that the temperature exceeds the temperature at which PPS melts.

  Originally, the high frequency propagated to the upper surface of the cooking dish from the gap between the heating chamber wall surface and the cooking dish is absorbed by the object to be heated, but in the case of empty baking, there is no object that absorbs the high frequency. Further, as described above, since the rotation of the right antenna 6b stops for 20 seconds, the high frequency radiated from the right antenna 6b continues to be radiated in the same direction during this period. Then, the electric field concentration continues in the same place and reaches a molten state.

  Therefore, when the cooking dish 8 according to the present embodiment is used and “Akito Fish Salt Grilled” is selected in the grilled state and cooking is started, no odor is generated even after 7 minutes. No strange odor is felt even when 10 minutes have passed since the high-frequency heating is finished, and when the temperature of the holding unit 10 at this time is measured, it is 190 ° C. and has not reached the melting temperature.

  In the above description, the most severe condition of baking is described as an example, but the present invention is effective even when the load is small or when the menu is operated with a load different from that assumed by the menu.

  As described above, according to the embodiment of the present invention, it is possible to provide a safe heating device in which melting of the holding unit 10 does not occur even when the customer misuses it.

  In the present embodiment, the cooking dish with a high-frequency heating element has been described. However, the present invention can also be applied to a cooking dish (square dish) made of enameled steel plate used during heater cooking.

  That is, normally, when a square dish used for heating the heater is placed in the heating chamber 1 and the user accidentally starts high-frequency heating, the wall of the heating chamber 1 or between the slide rail 9 and the square dish. As a result of the spark generated in step 1, the coating film on the metal surface disappears, the insulation property deteriorates, sparks are more likely to be generated, and a failure such as a hole in the wall surface may occur. In order to prevent this spark, a resin holder may be provided.

  If the idea of the present embodiment is applied, even in such a case, it is possible to provide a safe high-frequency heating apparatus that prevents the holding unit 10 from melting while preventing sparks.

FIG. 3 is a side view of cooking pan 8 in the present embodiment. As shown in FIG. 3, regarding the end of the cooking pan 8, the concave portion 10 a of the holding portion 10 described above is not provided, but the convex portion 10 b is outside the flange portion 8 b (side closer to the wall surface of the heating chamber 1). You may make it extend to. That is, when the cooking pan 8 is placed at a predetermined position in the heating chamber 1, the convex portion 10b provided at the end of the cooking pan 8 is located in the space 15 where electric field concentration is likely to occur.

  This is because the electric field in the gap between the wall surface of the heating chamber 1 and the cooking pan 8 is weaker at the end of the cooking pan 8 than the central portion of the cooking pan 8 and the amount of heat generated is small.

  FIG. 4 is a diagram showing a state of the wall surface in the heating chamber 1 in the present embodiment. As shown in FIG. 4, a high-frequency heating apparatus is generally provided with an interior lamp for illuminating the inside of the heating chamber 1 outside the heating chamber 1. In addition, a plurality of small holes 14 may be provided in the wall surface of the heating chamber 1 so that high frequency does not leak from the interior lamp portion. In this case, the slide rail 9 is divided into front and rear.

  If the cooking pan 8 is inserted horizontally, the cooking pan 8 will not drop off at the portion without the sliding rail 9, but if the cooking pan is inserted diagonally, the cooking pan 8 will drop off at the portion without the sliding rail 9. There are things to do.

  Therefore, if the holding part 10 secures the vertical dimension of the part close to the wall surface of the heating chamber 1, when inserted so as to cross the sliding rail 9 at the front of the heating chamber 1 obliquely, Since it cannot be inserted to the back by hitting the railing surface of the rail, the user reinserts it horizontally again, and can prevent the cooking pan 8 from falling off.

  As described above, the present invention can be applied to a high-frequency heating apparatus that cooks an object to be heated using a cooking dish, and a space is provided between the outer peripheral part of the holding part of the cooking dish and the heating chamber wall surface, and the holding part. The portion that is close to the cooking pan has a space between the wall and the portion that is not close to the cooking pan of the holding portion is in contact with the wall surface, so the holding portion melts even when the user misuses it. Therefore, a safe heating device can be provided.

Front sectional view of a high-frequency heating device in an embodiment of the present invention External perspective view of a high-frequency heating device in an embodiment of the present invention Side view of cooking pan 8 in the embodiment of the present invention The figure which shows the mode of the wall surface in the heating chamber 1 in embodiment of this invention

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Heating chamber 2 Magnetron 3 Waveguide 4a Left antenna 4b Right antenna 5 Food placing table 6a, 6b Motor 7 Heater 8 Cooking dish 9 Sliding rail 10 Holding part 10a Recessed part 10b Protruding part 10c Leg part 11 Door 12 Operation part 13 Display Part 14 Hole 15 Space

Claims (5)

A heating chamber that is configured with a metal wall and stores an object to be heated, a holding portion configured with an insulator on an outer peripheral portion, and a metal cooking dish on which the object to be heated is placed, and the holding unit The cooking utensil for high-frequency heating includes a dish receiving shelf in which the cooking dish is installed at a predetermined position in the heating chamber, and heating means for heating the object to be heated and the cooking dish. And when the said cooking pan is installed in the said predetermined position, while the space is provided between the outer peripheral part of the said cooking pan and the said wall surface, the part adjacent to the said cooking pan of the said holding | maintenance part is the said wall surface And a portion of the holding portion that is not close to the cooking pan is in contact with the wall surface. The bending part is provided in the outer peripheral part of the cooking dish, and the part of the holding part that is close to the cooking dish is provided so as to be positioned below or inside the bending part of the cooking dish. Cookware for high frequency heating. The cooking utensil for high frequency heating according to claim 1 or 2, wherein the heating means is high frequency generation means for generating microwaves, and the cooking dish has a heat generating layer that generates heat by absorbing the microwaves. The cooking utensil for high frequency heating according to claim 1 or 2, wherein the heating means is high frequency generating means for generating microwaves, and the cooking dish is a metal square dish. The high frequency heating apparatus provided with the cooking utensil for high frequency heating of any one of Claim 1 to 4.