JP2007271103A - Induction heating cooker - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a high-frequency heating cooker having improved cooking performance by improving the heat generation efficiency of a scorch pan and reducing the amount of high-frequency absorbed by food.
An outer periphery of a scorch pan 8 is brought into contact with a door metal frame 18 and a heating chamber wall surface to form a closed space surrounded by metal, and a high frequency heating element 9 generates heat by confining a high frequency in the metal closed space. To improve. As a result, the heat generation efficiency of the scorch pan 8 can be improved and the scorch cooking time can be shortened, and cooking with a high amount of moisture / umami components can be realized in the scorch cooking with less heating from inside the food due to high frequency.
[Selection] Figure 1

Description

  The present invention relates to a high-frequency cooking device using a scorching pan.

  Generally, a scorching pan used in a high-frequency heating cooker is configured to receive a high-frequency heating element that generates heat by absorbing high frequencies such as ferrite, carbon, silicon carbide, metal powder, and barium titanate, and is attached to the bottom of the pan. This burnished dish is very convenient because it can burn food like a heater in a microwave oven, and is widely accepted by consumers. In addition, when used in combination with the upper heater, the food can be heated from above and below, and there is no need to turn the food over during cooking. In addition, there is no need for a lower heater that scorches the bottom of the food, reducing the product price. Although it is a scorching pan for a microwave oven equipped with a high-frequency heating element having many merits as described above, there are the following disadvantages.

  First, cooking using a microwave oven dish is performed as follows. A scorch pan with food is placed in the heating chamber, and the high frequency generated by the high frequency generator is supplied into the heating chamber. The high-frequency heating element mounted on the scorching pan generates heat by absorbing high frequency, and heats the food surface with the heat. Cooking ends when the food is burnt or when the food is sufficiently cooked. In order to finish the food deliciously, it is desirable to finish cooking in as short a time as possible, because if the cooking time is long, the moisture contained in the food evaporates, resulting in a less crisp taste. For this reason, proposals have been made to improve the heat generation efficiency by absorbing the supplied high frequency to the high frequency heating element as efficiently as possible.

  In order to increase the heat generation efficiency of the high frequency heating element, it is desirable that the high frequency supplied into the heating chamber is not absorbed by the food as much as possible. This is because most of the high frequency energy is absorbed by the food and the heat generation efficiency of the high frequency heating element is reduced. In addition, the high frequency heats from inside the food and promotes evaporation of moisture and umami components. As a result, the food is dried and the taste of crispness is low. Originally, the baked goods by the radiant heat of the heater are preferred to have a crisp feel by removing moisture from the outside of the food, and a succulent finish that leaves the umami ingredients in the contents. Conventional cooking using a scorching dish for a microwave oven takes time, and the inside of the food has a dull taste with little dry taste.

  Therefore, in the conventional high frequency heating cooker, the heat generation efficiency of the high frequency heating element is increased by devising the shape of the metal dish on which the high frequency heating element is mounted.

  FIG. 4 is a cross-sectional view of such a high-frequency cooking device, and FIG. 5 is a cross-sectional view of the main part of FIG.

  In FIG. 4, reference numeral 1 denotes a magnetron that generates a high frequency, and the high frequency 2 generated by the magnetron 1 passes through the waveguide 3 and is radiated to the heating chamber 4 from a power supply port 5 provided on the bottom surface of the heating chamber 4. The radiated high frequency 2 is stirred by the rotating antenna 6 and reaches every corner of the heating chamber 4. 7 is a ceramic bottom plate on which food is placed during microwave cooking. 8 is a scorching pan, which uses metal that reflects high frequencies. A high-frequency heating element 9 that generates heat due to a high frequency is bonded to the back surface of the scorching pan 8. A door 11 for taking in and out the food 10 is installed at the front opening of the heating chamber 4.

The door 11 is divided into a door resin portion 12 that forms an outer casing and a door metal frame 13 that cuts off high frequency. The door metal frame 13 includes a door punching portion 13a for viewing except the inside of the heating chamber 4, and a heating chamber. It is integrally composed of three parts: a flat metal part 13b facing the front plate 4 and a door choke part 13c that blocks high frequency. On the heating chamber 4 side of the door punching portion 13a, a door glass 14 for blocking hot air in the heating chamber is provided.

The movement of the high frequency 2 radiated from the power supply port 5 will be described with reference to FIG. The high frequency 2 is radiated from the power supply port 5 and then stirred by the rotating antenna 6. Thereafter, most of the energy is absorbed by the high-frequency heating element 9 installed on the back surface of the scorch pan 8, and the energy is converted into heat. The food 10 is heated and burnt by the heat. However, between the door punching portion 13a and the scorch pan 8, a clearance 15 is provided to prevent the door glass 14 from being damaged by the thickness of the door glass 14 and the metal outer periphery of the scorch pan 8. Part of the high frequency 2 passed through and was absorbed by the food 10 (for example, see Patent Document 1).
JP 10-149877 A

  Thus, in the conventional high-frequency cooking device, a part of the high-frequency 2 generated by the magnetron 1 is not absorbed by the high-frequency heating element 9 of the scorch pan 8 and the outer periphery of the door punching portion 13a and the scorch pan 8 It leaked from the gap between the parts and was absorbed by food 10. Therefore, the amount of high frequency absorbed by the high frequency heating element 9 is reduced, the heat generation efficiency of the high frequency heating element 9 is poor, and cooking takes time. In addition, since the food is heated from the inside by high frequency, the moisture inside the food is evaporated, and the taste is less delicious with less crispy taste.

  The present invention solves the above-described conventional problems, and improves the heat generation efficiency of the scorch pan so as to shorten the cooking time by the scorch pan, and reduces the amount of high frequency absorbed by the food during the scorch pan cooking. Thus, an object of the present invention is to provide a high-frequency heating cooker that enables cooking with reduced evaporation of moisture inside the food.

  In order to solve the above-described conventional problems, a high-frequency cooking device of the present invention includes a heating chamber made of metal for cooking an object to be heated, a high-frequency generator that supplies a high frequency to the heating chamber, and the high-frequency generator. A waveguide that guides the high frequency generated by the heating chamber, a door that is installed in the opening of the heating chamber and allows the object to be taken in and out, and a door metal that constitutes the door and faces the front plate of the heating chamber The frame is composed of a metal scorching pan mounted on the back surface of a frame and a high-frequency heating element that is placed in the heating chamber and generates heat by absorbing high frequency, and the high-frequency supplied by the high-frequency generating means is fed from the bottom of the heating chamber. The scorching pan is configured to bring the scorching pan metal outer peripheral portion into contact with the door metal frame and the heating chamber wall surface when placed in the heating chamber.

  As a result, the high frequency supplied by the high frequency generating means stays in the closed space surrounded by the scorching pan, the door metal frame, and the heating chamber wall, and is absorbed by the scorching pan high frequency heating element to effectively generate heat, High frequency is not absorbed by the heated object placed on the scorching pan.

  INDUSTRIAL APPLICABILITY The present invention can improve the heat generation efficiency of a scorch pan and shorten the scorch cooking time, and can realize cooking in which a lot of moisture / umami components are left in the scorch cooking with less heating from inside the food due to high frequency.

The present invention includes a heating chamber made of metal for cooking an object to be heated, a high-frequency generator that supplies a high frequency to the heating chamber, a waveguide that guides the high-frequency generated by the high-frequency generator to the heating chamber, A door installed at the opening of the heating chamber for taking in and out the object to be heated, a door metal frame that constitutes the door and faces the front plate of the heating chamber, and is placed in the heating chamber to absorb high frequencies. It is composed of a metal scorching pan mounted on the back surface with a high-frequency heating element that generates heat, the high-frequency supplied by the high-frequency generating means is fed from the bottom of the heating chamber, and the scoring pan is placed in the heating chamber In this case, the metal outer peripheral portion is brought into contact with the door metal frame and the heating chamber wall surface portion.

  With this configuration, the high-frequency power supplied from the lower part of the heating chamber is confined in a closed space surrounded by the metal consisting of the charcoal plate, heating chamber wall, and door metal frame, so it is placed outside the upper space (above the charcoal plate). It is not absorbed by processed foods. Therefore, all the high frequency supplied to the closed space is absorbed by the high frequency heating element, so that the heat generation efficiency is increased and the cooking time can be shortened. In addition, since the high frequency does not reach the upper part of the scorching pan on which the food is placed, the food does not absorb the high frequency and heating from the inside does not occur. Therefore, it is possible to realize a high-frequency heating apparatus that has a large amount of appropriate moisture / umami components and is excellent in cooking performance.

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

(Embodiment 1)
FIG. 1 is a cross-sectional view of a high-frequency cooking device according to the present invention in which a scorching pan for a microwave oven is placed in a heating chamber, and FIG. 2 is a cross-sectional view of the main part of FIG. FIG. 3 is a graph showing the difference in performance between the high-frequency cooking device of the present invention and the conventional high-frequency cooking device.

  In FIG. 1, reference numeral 1 denotes a magnetron that generates a high frequency. A high frequency 2 generated by the magnetron 1 passes through a waveguide 3 and is radiated to a heating chamber 4 from a power supply port 5 provided on the bottom surface of the heating chamber 4. The radiated high frequency 2 is stirred by the rotating antenna 6 and reaches every corner of the heating chamber 4. 7 is a ceramic bottom plate on which food is placed during microwave cooking. 8 is a scorching pan, which uses metal that reflects high frequencies. A high-frequency heating element 9 that generates heat due to a high frequency is bonded to the back surface of the scorching pan 8. In this embodiment, the high-frequency heating element 9 uses ferrite.

  A door 16 for taking in and out the food 10 is installed at the front opening of the heating chamber 4. The door 16 is divided into a door resin portion 17 that forms an outer casing and a door metal frame 18 that blocks high frequency. Furthermore, the door metal frame 18 has three parts: a door punching part 18a for peeking inside the heating chamber 4, a metal flat part 18b facing the front plate of the heating chamber 4, and a door choke part 18c for blocking high frequencies. It is composed of The difference from the conventional example shown in FIG. 4 is that the metal flat portion 18b on the lower side of the door is widely contacted with the metal outer peripheral portion of the scoring pan 8. The door glass 19 is positioned above the burnt pan insertion position.

  The movement of the high frequency 2 radiated from the power supply port 5 will be described with reference to FIG. The high frequency 2 is radiated from the power feeding port 5, then stirred by the rotating antenna 6, and then radiated into the metal closed space surrounded by the metal scorching pan 8, the metal wall surface of the heating chamber 4, and the door metal frame 18. . The metal flat portion 18b constituting the door metal frame 18 can be made to come into contact with the metal outer peripheral portion of the scorch pan 8 by spreading the metal flat portion 18b upward from the conventional example. Conventionally, there was a gap corresponding to the thickness of the door glass and the clearance (see FIG. 5) so as not to damage the door glass, but in this example, there is no gap and the high frequency 2 does not leak above the scorch pan 8. . In this way, the high frequency fed from the lower part of the heating chamber is confined in the closed space surrounded by the metal consisting of the scorching pan, the heating chamber wall and the door metal frame, and the high frequency 2 is all absorbed by the high frequency heating element 9. Become. That is, all the high frequencies 2 are absorbed by the high frequency heating element 9 without loss, and the heat generation efficiency is dramatically improved. Therefore, cooking time can be shortened.

  In addition, since there is no gap in which the high frequency 2 leaks above the scorch pan 8, the food placed on the scorch pan 8 is not internally heated by the high frequency scorch 8, and even after cooking A high-frequency heating cooker with a large amount of umami components remaining inside and excellent cooking performance can be realized.

  FIG. 3 is a graph showing the difference in performance between the high-frequency cooking device of the present invention and the conventional high-frequency cooking device. The surface temperature rise value at the center of the scorch pan when a simulated water load (300 cc) is placed on the scorch pan and a high frequency output of 700 W is supplied into the heating chamber (power feeding from below) is shown.

  According to the graph, the high-frequency cooking device of the present invention reaches from 20 ° C. to 158 ° C. in 5 minutes after the start of cooking, but the conventional cooking device reaches only 133 ° C. It can be said that the high-frequency cooking device of the present invention is more efficient than the conventional one by the temperature difference of 25 ° C. Moreover, the temperature rise value (high-frequency heating / 700 W / 5 minutes) of the simulated load water 300 CC at this time was 30 deg in the conventional cooker compared with the high-frequency cooker 8 deg of the present invention. It can be seen that the high frequency heating cooker of the present invention hardly absorbs high frequency in food (water load).

  As described above, according to the present invention, cooking time can be shortened and cooking performance can be improved in cooking with a scorch pan using a high-frequency heating element, so that it can be applied to all microwave ovens equipped with a scorch pan.

Sectional drawing of the high frequency heating cooker in Embodiment 1 of this invention Cross section of the main part of the same high-frequency cooking device Graph showing the performance of the high-frequency cooking device Sectional view of a conventional high-frequency cooking device Cross section of the main part of the same high-frequency cooking device

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 High frequency generator 3 Waveguide 4 Heating chamber 8 Scorched pan 9 High frequency heating element 16 Door 18 Door metal frame

Claims (1)

A heating chamber made of metal for cooking the object to be heated, a high frequency generator for supplying a high frequency to the heating chamber, a waveguide for guiding the high frequency generated by the high frequency generator to the heating chamber, A door installed in the opening for taking in and out the object to be heated, a door metal frame that constitutes the door and faces the front plate of the heating chamber, and a high-frequency heat generation that is placed in the heating chamber and absorbs high frequency to generate heat It is composed of a metal scorching pan mounted on the back surface, and the high frequency supplied by the high frequency generating means is fed from the bottom of the heating chamber, and when the scorching pan is placed in the heating chamber A high frequency heating cooker configured to bring a burnt-out dish metal outer peripheral portion into contact with the door metal frame and the heating chamber wall surface portion.