JPH0714725Y2 - High frequency cooking device with heater - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial field of application) The present invention relates to a high-frequency cooking apparatus with a heater, which has a reflector and an upper heater on the upper surface of a cooking chamber.

(Prior Art) As shown in FIG. 4, a conventional high-frequency heating cooking device with a heater is provided with a rotary plate 3 rotatably driven by a motor 2 in the center of the bottom of a heating cooking chamber 1. The cooked food (not shown) is heated at high frequency by a magnetron (not shown). Furthermore, the grill 5 is provided in the middle of the cooking chamber 1 so that it can be moved in and out by changing it to the front door 6 side.
The reflection plate 7 is provided on the upper surface of the above so as to change to the front door 6 side. The reflector 7 is formed in a shape protruding upward and extending in the left-right direction so as to form a heater housing space 7a inside thereof. An upper heater 8 is provided inside the reflector 7 so as to extend in the left-right direction.

(Problems to be Solved by the Invention) In the above conventional configuration, since the reflection plate 7 is changed to the front door 6 side, the distribution state of the reflected wave by the reflection plate 7 during high frequency heating is also changed to the front door 6 side. It will be what you did. On the other hand, since the rotary dish 3 on which the food is placed is located in the center of the cooking chamber 1, the distribution state of the reflected waves applied to the food on the rotary dish 3 is not uniform, The front door 6 is biased toward the side, which is a cause of hindering uniform heating of the cooked food during high frequency heating.

In order to improve this, for example, as shown in Japanese Patent Laid-Open No. Sho 64-3418, a reflector is positioned almost directly above the center of rotation of a rotating dish, and an upper heater is arranged in the center of this reflector. There is something.

However, the back surface of the cooking chamber is formed of a metal plate such as a stainless steel plate that easily reflects the radiant heat of the upper heater, while the inner surface of the front door, which is the front surface of the cooking chamber, has a low radiant heat reflectance. Since it is composed of a glass plate or the like, if the upper heater is arranged in the center of the reflector as in the structure described in the above publication, the reflected heat from the back side from the front side when heated by the upper heater is It becomes stronger than the reflected heat, the temperature distribution on the rotating dish becomes unbalanced, and there is a drawback that the food cannot be uniformly heated when heated by the upper heater.

The present invention has been made in consideration of such circumstances, and therefore an object of the present invention is to provide a reflector and an upper heater on the upper surface of a heating and cooking chamber for high frequency heating and heating by the upper heater. In any of the above cases, it is an object of the present invention to provide a high-frequency heating cooking device with a heater, which can uniformly heat the cooked food.

[Structure of the Invention] (Means for Solving the Problems) A high-frequency heating and cooking apparatus with a heater according to the present invention includes a rotary plate rotatably provided at the bottom of a heating chamber and a cooking dish on the rotary plate at a high frequency. A magnetron for heating, a reflection plate provided on the upper surface of the heating chamber so as to project upward and extend in the left-right direction, and an upper heater arranged inside the reflection plate so as to extend in the left-right direction. The front door of the cooking chamber is configured such that the center of the reflector in the front-rear direction is located almost directly above the center of rotation of the rotary plate, and the position of the upper heater is inside the reflector. It is configured to change to the side.

(Operation) Since the center of the reflector in the front-rear direction is located almost directly above the center of rotation of the rotary plate, the distribution of the reflected waves from the reflector becomes almost uniform on the rotary plate, and the high frequency heating will cause The heating condition of the cooked food becomes uniform.

In the dish, the back of the cooking chamber is formed of a metal plate such as a stainless plate that easily reflects the radiant heat of the upper heater, while the inner surface of the front door, which is the front of the cooking chamber, is In consideration of the fact that it is composed of a low glass plate, etc., the position of the upper heater is changed to the front door side of the cooking chamber inside the reflection plate, so that reflection from the back side when heating by the upper heater The heat and the heat reflected from the front side can be equalized, and the temperature distribution on the rotating dish can be made uniform, and the cooking can be uniformly heated when the upper heater heats.

Embodiment An embodiment of the present invention will be described below with reference to FIGS. 1 to 3.

First, in FIG. 2 showing a vertical front view of the whole body (the outer box is not shown), 11 is an inner box having a heating and cooking chamber 12 inside, and a motor 13 is rotationally driven in the center of the bottom of the box. A rotating dish 14 is provided. This rotating plate 14 and inner box
A lower heater 15 is disposed between the bottom plate 11 and the bottom plate. On the other hand, a waveguide 16 is attached to the right side surface of the inner box 11, and a magnetron 17 is fixed to the waveguide 16. 18 is the inner box
A reflection plate attached to the upper surface of 11 by welding or the like. This reflection plate 18 is formed so as to project upward in a polygonal shape and extend in the left-right direction as shown in FIG. The lower surface side of the reflection plate 18 is opened into the cooking chamber 12 through the rectangular opening 11a. In this case, the center C of the reflecting plate 18 in the front-rear direction is set to the rotation center of the rotary plate 14 (the rotation axis of the motor 13).
It is located almost directly above 13a). An upper heater 19 made of, for example, a glass tube heater is disposed inside the reflector 18 at a position described later so as to extend in the left-right direction.

The point to be noted here is that the position of the upper heater 19 is changed to the front door 23 side of the cooking chamber 12 inside the reflection plate 18. In this case, the displacement amount 1 of the upper heater 19 is, for example,
It is set to 10 mm.

As shown in FIG. 3, the mounting structure of the upper heater 19 has an annular shape in which the heater penetrating cylinder portion 20 is formed so as to project outward on the end plate portion 18a of the reflecting plate 18 and is fixed to the heater penetrating cylinder portion 20. Insulator 21
The upper heater 19 is supported by the mounting plate 22 fixed to the upper surface of the inner box 11, and the lateral movement of the upper heater 19 is restricted. Further, in FIG. 1, 23 is a front door that opens and closes the front surface of the heating and cooking chamber 12.

Next, the operation of the above configuration will be described. When cooking by high-frequency heating, place the heating object on the rotating dish 14,
The motor 13 is energized to rotate the rotary plate 14 and the magnetron 17 is operated to generate a high frequency (microwave). The high frequency is supplied from the outlet 16a of the waveguide 16 to the cooking chamber 12
Let it radiate in. As a result, the food on the rotating dish 14
The direct wave from the exit 16a of the waveguide 16 and the reflected wave reflected by the inner surface of the inner box 11 and the reflection plate 18 are irradiated and heated from the surroundings.

In this case, since the center C of the reflecting plate 18 in the front-rear direction is located almost directly above the center of rotation of the rotating dish 14, the distribution of the reflected wave from the reflecting plate 18 during the high frequency heating by the magnetron 17 is the same as in the conventional case. Rotating plate 14 without biasing to the front door 23 side
The reflected waves are almost evenly radiated to the entire cooking above. For this reason, the entire cooking product can be uniformly heated during high-frequency heating, and uneven heating can be prevented.

By the way, the rear surface of the cooking chamber 12 (the inner surface of the inner box 11) is formed of a metal plate such as a stainless plate that easily reflects the radiant heat of the upper heater 19, while the front door that is the front surface of the cooking chamber 12 is The inner surface of 23 is made of a glass plate or the like having a low reflectance of radiant heat. Therefore, if the position of the upper heater 19 is set to the center of the cooking chamber 12 (on the center of rotation of the rotary plate 14), the heat reflected from the back side will be the heat reflected from the rear side when the upper heater 19 is cooking. As a result, the food on the rotary dish 14 is heated more strongly on the back side, which causes uneven baking and uneven darkness.

However, in this embodiment, since the position of the upper heater 19 is changed to the front door 23 side of the cooking chamber 12 inside the reflection plate 18, the reflected heat from the rear side and the front surface when heating by the upper heater 19 are performed. Rotating plate that can equalize the heat reflected from the side
The temperature distribution due to the radiant heat and the reflected heat from the upper heater 19 on the upper part 14 can be made uniform, and the cooked food can be uniformly heated by the upper heater 19, and uneven burning and dark brown color can be prevented.

The present invention is not limited to the above embodiment, and various modifications are possible such as changing the support structure of the upper heater 19 or changing the cross-sectional shape of the reflection plate 18. .

[Effects of the Invention] As is apparent from the above description, the present invention has a configuration in which the center of the reflector in the front-rear direction is positioned almost directly above the center of rotation of the rotating dish, so that the reflector is heated during high frequency heating by the magnetron. The distribution of the reflected waves from the system is not biased toward the front door side as in the conventional case, and the reflected waves can be evenly radiated to the entire cooked food on the rotating dish, and the entire cooked food can be heated uniformly during high frequency heating. It is possible to prevent unevenness.

Moreover, since the position of the upper heater is changed to the front door side of the cooking chamber inside the reflector, the heat reflected from the back side and the heat reflected from the front side are equalized during heating by the upper heater. As a result, the temperature distribution on the rotary dish can be made uniform, and the cooked food can be uniformly heated by the upper heater, so that uneven baking and uneven coloring can be prevented.

[Brief description of drawings]

1 to 3 show an embodiment of the present invention.
FIG. 1 is a vertical sectional side view of a heating and cooking chamber portion, FIG. 2 is a vertical sectional front view thereof, and FIG. 3 is an enlarged vertical sectional front view of a support structure portion of an upper heater. FIG. 4 is a view corresponding to FIG. 1 showing a conventional example. In the drawings, 11 is an inner box, 12 is a cooking chamber, 13 is a motor, 14 is a rotary plate, 15 is a lower heater, 17 is a magnetron, 18 is a reflector, 19 is an upper heater, and 23 is a front door.

Claims (1)

[Scope of utility model registration request] 1. A rotating dish rotatably provided at the bottom of a cooking chamber, a magnetron for high-frequency heating of food on the rotating dish, and a magnetron projecting upward from the upper surface of the cooking chamber and extending in the left-right direction. In a structure provided with a reflection plate provided so as to extend and an upper heater arranged inside the reflection plate so as to extend in the left-right direction, the center of the reflection plate in the front-rear direction is defined as the center of rotation of the rotary plate. A high-frequency heating cooking device with a heater, characterized in that it is positioned almost directly above and the position of the upper heater is changed to the front door side of the heating chamber inside the reflection plate.