KR20010004083A - Heating device for microwave oven - Google Patents

Abstract

PURPOSE: A heating device of a microwave oven is provided to make a user to cook conveniently by having a convective cooking function and a grilled cooking function and to evenly and rapidly transmit heat of a heater to foods since the air moves in one direction, i.e., from the upper portion to the lower portion. CONSTITUTION: A heating device of a microwave oven includes a heater(8) mounted on an upper end inside a cavity and for generating heat according to the supply of electric source, a circulatory duct(9) mounted on the cavity and having an upper end and a lower end communicating to an upper center and a lower surface of the cavity respectively to circulate the inside air of the cavity, a driving motor(12) mounted on an upper end of the circulatory duct and driven during cooking, and a fan(14) mounted on a motor shaft(13) of the driving motor and rotating to supply air to the inside of the cavity.

Description

Heating device of microwave oven {HEATING DEVICE FOR MICROWAVE OVEN}

The present invention relates to a heating apparatus for a microwave oven, and more particularly, to efficiently perform both a convection cooking function and a grill cooking function by a heating device mounted on a microwave oven.

In general, the microwave oven is widely used as a cooking utensil for heating food using microwaves, as shown in FIG. 1, the door having the cooking window 16 attached to one side of the front surface of the main body 1a. 17 is installed to be openable and close, and a control panel 18 having a plurality of operation switches (not shown) is mounted on the other front side of the main body 1a.

In addition, a microwave oven equipped with a conventional convection cooking function is mounted on one side of the cavity 2a in the main body 1a to generate microwaves, as shown in FIG. 2, and the cavity. A waveguide 4 for transporting microwaves into the inside of (2a), a turntable driving motor 5 mounted below the main body 1a, and an upper end of the motor shaft 6 of the turntable driving motor 5. The heater is installed in the turntable 7 is rotated by receiving a rotational force through the motor shaft (6), and the heater 19 is mounted on the other side of the cavity (2a) in the main body (1a) and generates heat during cooking It consists of the chamber 20.

In addition, it is provided on the motor shaft 22 of the convection cooking drive motor 21 mounted on the rear of the heater chamber 20 and the convection cooking drive motor 21 inside the heater chamber 20. A blowing fan 24 which is rotated by the driving motor 21 for the convection cooking to supply the heat generated by the heater 19 to the inside of the cavity 2a through the plurality of through holes 23, and It is detachably installed in the center part inside the cavity 2a, and consists of a confectionery cooking table 15 for supporting during cooking of bread type.

Conventional microwave ovens having the above-described configuration are mainly used for cooking bakery in the case of convection cooking. For this purpose, it is important to maintain a uniform temperature distribution inside the cavity 2a. Since the fan is rotated by the rotation of the motor shaft 22 according to the driving of the convection motor 21, the heat generated by the heater 19 built in the heater chamber 20 is plural. It is supplied to the inside of the cavity 2a through the through hole 23 to cook while circulating the air in the direction of the arrow shown in FIG.

Meanwhile, as shown in FIG. 3, a microwave oven having a conventional grill cooking function is mounted on one side of the cavity 2a in the main body 1a to generate microwaves and the cavity (3). A waveguide 4 for transferring microwaves into the inside of 2a), a turntable driving motor 5 mounted below the main body 1a, and an upper end of the motor shaft 6 of the turntable driving motor 5; A turntable 7 installed to rotate by receiving rotational force through the motor shaft 6, a heater holder 25 installed inside the main body 1a above the cavity 2a, and the heater holder 25. Both ends are supported by the heater 26 to generate heat during cooking, and the reflector plate 27 installed on the heater 26 to reflect the heat generated by the heater 26 to the interior of the cavity 2a. It is composed.

A conventional microwave oven equipped with a grill cooking function having the above configuration is mainly used for meat cooking, and the food placed on the top of the turntable 7 is cooked using the heat generated by the heater 26. The generated heat uses the heat transmitted by natural convection and a small amount of radiant energy.

However, in the case of a microwave oven equipped with such a conventional convection cooking function, the distance difference from the heater 19 to the food is large, and the temperature around the heater 19 becomes high and the temperature on the opposite wall is relatively low. Due to the uneven heat distribution, the cooking state may be degraded, and temperature control inside the cavity 2a may not be accurately controlled, and in the same plane, as the air enters and exits the heater chamber 20, the air flow may be interrupted to smooth the overall flow flow. There is a problem such that the heat of the heater 19 is not sufficiently transferred to the cavity 2a because it does not.

In addition, the microwave oven equipped with a conventional grill cooking function simply uses natural convective heat and a small amount of radiant heat, so the heat transfer is delayed, resulting in a long cooking time, and in the case of natural convection, the hot air tries to rise to the upper part. Since food is at the bottom, heat is transferred to the upper surface of the cavity 2a, so an insulation or cooling device is required on the upper surface of the cavity 2a, and in particular, a heating device for the convection and grill cooking function must be installed. There were many problems such as causing the inconvenience.

Therefore, the present invention is to solve the above problems, by the heating device mounted on the microwave oven to efficiently perform both the convection cooking function and the grill cooking function, the user can conveniently cook food In addition, since the air flow inside the cavity is made in one direction from the top to the bottom, an object of the present invention is to provide a heating apparatus of a microwave oven, which enables the heat of the heater to be evenly and quickly transferred to the food.

1 is a perspective view showing a state in which the door of the conventional microwave oven is opened

Figure 2 is a longitudinal sectional view showing a microwave oven equipped with a conventional confection cooking function

Figure 3 is a longitudinal sectional view showing a microwave oven equipped with a conventional grill cooking function

4 is a longitudinal sectional view showing the microwave oven according to the present invention from the front;

5 is a longitudinal cross-sectional view of FIG.

Figures 6a and 6b is a longitudinal sectional view showing the flow of air during the convection and grill cooking according to the present invention, respectively

Explanation of symbols on the main parts of the drawings

2; Cavity 8; heater

9; Circulation duct 10; Discharge hole

11; Suction hole 12; Drive motor

13; Motor shaft 14; Blower fan

In order to achieve the above object, the present invention is installed in the upper end of the cavity to generate heat as the power is supplied to the heater, and installed on the other side of the cavity, the upper and lower ends are in communication with the upper center and lower side of the cavity, respectively A circulation duct for circulating air in the cavity, a drive motor mounted at an upper end of the circulation duct to drive cooking, and a blowing fan installed on a motor shaft of the drive motor to rotate to supply air to the inside of the cavity There is provided a heating apparatus of the microwave oven, characterized in that the configuration.

Hereinafter, with reference to the accompanying drawings, preferred embodiments of the present invention for achieving the above object will be described in detail.

Figure 4 is a longitudinal cross-sectional view showing a microwave oven according to the present invention from the front, Figure 5 is a longitudinal cross-sectional view shown in Figure 4, Figures 6a and 6b is a flow state of air during cooking and grill cooking according to the present invention As a longitudinal cross-sectional view which respectively shows the same part as the prior art, the same code | symbol is attached | subjected and this invention is demonstrated.

The present invention is equipped with a magnetron (3) for generating microwaves on one side of the cavity (2) inside the main body (1) of the microwave oven, and the microwave generated by the magnetron (3) in front of the magnetron (3) A waveguide 4 for transferring the inside of the main body 1 is installed, and a turntable driving motor 5 is mounted at a lower portion of the main body 1, and a motor shaft is disposed at an upper end of the motor shaft 6 of the turntable driving motor 5. The turntable 7 is rotated by receiving the rotational force through the 6 and the heater 8 is installed at the upper end of the cavity 2 to generate heat as power is supplied during cooking.

In addition, on the other side of the cavity 2 inside the main body 1, the upper and lower ends communicate with the upper center and the lower side of the cavity 2, respectively, so as to circulate air in the cavity 2 when cooking. Is installed and a plurality of discharge holes 10 are formed at the upper end of the circulation duct 9 to supply the air heated by the heat of the heater 8 to the inside of the cavity 2, and the circulation duct 9 A plurality of suction holes 11 are formed at the lower end of the).

In addition, the upper end of the circulation duct 9 is equipped with a drive motor 12 for driving during cooking, and the motor shaft 13 of the drive motor 12 through the plurality of discharge holes (10) when cooking the cavity ( A blowing fan 14 which rotates to supply air in the inside of 2) is installed, and the convection cooking table 15 for supporting the cooking of bread type is detachably attached to the center of the cavity 2. Installed and configured.

In the present invention configured as described above, as shown in FIG. 6A, when the user first wants to cook a bread-type confection using a microwave oven, the table 15 for the confection cooking in the center of the cavity 2 is provided. Put the breads to be cooked thereon in a state of mounting, and when cooking grills such as fish or meat, as shown in FIG. 6B, fish or meats to be cooked on the turntable 7 as shown in FIG. Put on to cook.

When the food is introduced into the cavity 2 to start cooking, power is supplied to the heater 8 installed at the upper end of the cavity 2 to generate heat, and at the same time, the main body 1 On the other side of the interior cavity (2), the top and bottom are respectively connected to the upper center and lower side of the cavity (2) is mounted on the upper end of the circulation duct (9) installed to circulate the air inside the cavity (2) during cooking A plurality of discharge holes 10 formed at the upper end of the circulation duct 9 as the drive motor 12 is driven and the blower fan 14 installed on the motor shaft 13 of the drive motor 12 rotates. The hot air heated by the heater 8 as forced convection is delivered to the inside of the cavity 2 through), and the hot air supplied to the inside of the cavity 2 heats the food.

Thereafter, the air in the cavity 2 is transferred into the circulation duct 9 through the plurality of suction holes 11 formed in the lower end of the circulation duct 9 in communication with the lower side of the cavity 2. The air inside the cavity 2 continues in one direction from the upper side to the lower side while repeating the transfer of the heat of the heater 8 to the food while being transferred to the cavity 2 by the rotation of the blower fan 14 again. By cycling, food can be cooked quickly and efficiently.

As described above, according to the present invention, the heating apparatus mounted in the microwave oven can efficiently perform both a convection cooking function of bread type and a grill cooking function such as meat or fish, so that the user can conveniently eat food. It can cook, and the distance from the heater to the food for cooking is almost the same, so the temperature distribution on the cooking surface is uniform, so the cooking condition is excellent, and the temperature distribution in the cavity is uniform, so it is easy to control the temperature. Since the air flow is made in one direction from the top to the bottom, it is a very useful invention with many advantages, such as to allow the heat of the heater to be evenly transferred to the food and to shorten the cooking time.

Although the preferred embodiments of the present invention have been illustrated and described above, the present invention is not limited to the above-described embodiments, and is generally defined in the technical field to which the present invention pertains without departing from the gist of the present invention as claimed in the following claims. Anyone with knowledge of the world will be able to make various changes.

Claims (2)

Heater installed at the upper end of the cavity to generate heat as power is supplied, and circulation ducts installed at the other side of the cavity to communicate with the upper center and lower side of the cavity, respectively, to circulate air in the cavity And a driving motor mounted at an upper end of the circulation duct and driven when cooking, and a blowing fan installed at a motor shaft of the driving motor to rotate to supply air into the cavity. Device. According to claim 1, wherein the upper end of the circulation duct is formed with a plurality of discharge holes for supplying the air heated by the heat of the heater to the inside of the cavity, a plurality of suction holes are formed in the lower end of the circulation duct Microwave heating device.