KR100392139B1 - A heating apparatus in multifunction microwave oven - Google Patents

Abstract

The present invention is intended for use in both the convection function and the grill function as a heater. The present invention is a rotary member 150 rotatably coupled to the side plate 112 of the cooking chamber 110, both ends are coupled to the rotating member 150 is installed in the cooking chamber 110, the heater 140, A heating apparatus having a heat insulating plate 142 coupled to one surface side of the 140 and having a plurality of second vent holes 144 formed on a surface in contact with the heater 140, by rotating the heater 140 and cooking chamber 110. When placed on the rear plate of 120 is used as a heat source for the convection performs an oven function, when the heater 140 is rotated and placed on the top or bottom of the cooking chamber 110 can be used as a heat source of radiant heat to perform a grill function. Therefore, by using both the grill function and the heat source of the oven function as one heater 140, the efficiency of the heater 140 can be increased to improve productivity of the microwave oven.

Description

Heater of multifunctional microwave {A HEATING APPARATUS IN MULTIFUNCTION MICROWAVE OVEN}

The present invention relates to a heating apparatus of a multi-function microwave oven, and more particularly, to use the convection function and the grill function as one heater to improve the productivity of the microwave oven by increasing the efficiency of the heater.

In general, the microwave oven, unlike conventional cooking apparatus of the external heating method using heat conduction and heat radiation, applies a high voltage to the microwave oscillation tube called magnetron to oscillate the microwave of 2450MHz, and the oscillated microwave into the microwave cooking chamber. By spinning and repeatedly converting the molecular arrangement of the moisture contained in the food, it is a mechanism for cooking food by generating frictional heat between the molecules.

In such a microwave, there is a single function microwave which cooks food using a microwave of 2450 MHz, which is only emitted from a magnetron, and a grill having a function of grill by having a heater above or below the cooking chamber in addition to the microwave. In addition to a microwave oven and a microwave, there is a multifunctional microwave oven such as a convection type microwave oven having a function of an oven for convection of hot air by installing a heater and a convection pan at the rear of the cooking chamber.

A conventional microwave oven equipped with both a grill function and an oven function as such a multifunctional microwave oven is shown in FIG. 1.

As shown in FIG. 1, a grill heater 20 for performing a grill function is exposed on an upper surface of the cooking chamber 10, and a rear machine room divided into the cooking chamber 10 and the diaphragm 32 ( 30 is provided with an oven heater 40 and a convection fan 42 for blowing air heated by the oven heater 40 into the cooking chamber 10.

When grilling fish and the like in the cooking chamber 10 using such a microwave oven, a grill function is required. At this time, only the grill heater 20 is operated to generate radiant heat, and the fish and the like are grilled using this heat. In this case, the oven heater 40 and the convection fan 42 do not operate.

And when baking bread or sweets using the above-mentioned microwave oven, the oven function is required. At this time, only the convection heater 40 and the convection fan 42 are operated to generate convective heat to bake bread or sweets in brown. In this case, the grill heater 20 does not operate.

By the way, when the grill function is required in such a microwave oven, only the heater 20 for grilling is used and the convection heater 40 is not used. When the oven function is required, only the convection heater 40 is used and the grill heater is used. 20 is not used. Therefore, since there is one heater that is not used in the conventional microwave oven, there is a problem that the productivity is low because the structure is inefficient.

The present invention has been made to solve the above-mentioned conventional problems, by using both the convection function and the grill function as a heater, to provide a heating device for improving the productivity of the microwave oven by increasing the efficiency of the heater. .

1 is a schematic side cross-sectional view of a typical multifunctional microwave;

Figure 2 is a perspective view of a part of the heating device of the multi-function microwave oven according to the first embodiment of the present invention.

3 is a side cross-sectional view of FIG.

4 is a partial cutaway perspective view of a state in which the heater is rotated in FIG. 2.

5 is a side cross-sectional view of FIG. 4.

Figure 6 is a side cross-sectional view of the rotating member shown in FIG.

7 is a front sectional view of the rotating member shown in FIG.

8 is a side cross-sectional view of a heating apparatus according to a second embodiment of the present invention.

<Explanation of symbols for main parts of drawing>

110: cooking chamber 112: side plate

114: through hole 116: protrusion

118: tray 120: thick plate

122: first vent 130: convection fan

140: heater 142: heat insulating plate

144: second vent 150: rotating member

152: inner guide 154: outer guide

156: protrusion 158: compression spring

160: cap 162: fixing hole

164: screw

The present invention for achieving the above object, a rotating member rotatably coupled to the side plate of the cooking chamber; A heater coupled to both ends of the rotating member and installed in the cooking chamber; And a heat insulating plate coupled to one side of the heater and having a plurality of ventilation holes formed on a surface in contact with the heater.

Such a heating device rotates the heater and is used as a heat source for convection when placed on the rear plate of the cooking chamber to perform the oven function. When the heater is rotated and placed on the top or bottom of the cooking chamber, it is used as a heat source for radiant heat to perform the grill function. .

Therefore, the heating apparatus of the present invention can use both the grill function and the oven function as a heat source as one heater, thereby improving the efficiency of the heater and improving the productivity of the microwave oven.

Hereinafter, preferred embodiments of the present invention as described above will be described to facilitate implementation of the present invention.

2 illustrates a grill function of the heating apparatus according to the first embodiment of the present invention, and FIG. 3 illustrates a side cross-sectional view of FIG. 2. 4 shows an oven function of the heating apparatus, and FIG. 5 shows a side cross-sectional view of FIG. 4.

The heating device of the present embodiment, the heater 140 is rotatably coupled to the side plate 112 of the cooking chamber 110, and both ends are coupled to the rotating member 150 is installed in the cooking chamber 110. And a heat insulating plate 142 coupled to one side of the heater 140 and having a plurality of second vent holes 144 formed on a surface in contact with the heater 140.

The rotating member 150 is coupled to the lower edge region of the side plate 112 so that the heater 140 is rotated to the rear plate 120 and the bottom of the cooking chamber 110, the heat insulating plate 142 is the bottom of the heater 140 To Therefore, when the heater 140 stands up and closely adheres to the rear plate 120 of the cooking chamber 110, the heat insulating plate 142 is positioned in front of the heater 140 to cover the heater 140. By preventing the radiant heat of the 140 directly transmitted, the hot air is convection by the convection fan 130 to enable the oven function of cooking food. In addition, when the heater 140 is laid down and closely adhered to the bottom of the cooking chamber 110, the heat insulation plate 142 is positioned at the bottom of the heater 140 to prevent heat of the heater 140 from being directly transmitted to the floor.

And the heater 140 and the heat insulating plate 142, when located on the bottom surface of the cooking chamber 110 should be avoided because the projection 116 for mounting the tray 118 has a shape suitable for this.

On the other hand, Fig. 6 shows a detailed side cross-sectional view of the rotating member shown in Fig. 2, and Fig. 7 shows a front sectional view of the rotating member shown in Fig. 6.

The rotating member 150 is coupled to the heater 140, the inner guide 152 is located on the inner side of the side plate 112, and the outer side coupled to the heater 140 is located on the outer side of the side plate 112 The side of the side plate 112 has a shape surrounding the outer surface of the guide 154, the side plate 112 and the outer guide 154, the compression spring 158 fitted to the heater 140, and the outer guide 154 Cap 160 is coupled to the outer surface.

The inner guide 152 and the outer guide 154 are press-fit into the heater 140, and the cap 160 is fixed to the outer surface of the side plate 112 with a screw 164.

In addition, a plurality of protrusions 156 protruding outward are formed on the outer surface of the outer guide 154 at regular intervals along the circumferential direction, and the cap 160 has a plurality of fixing grooves 162 corresponding to the protrusions 156. Is formed.

When the outer guide 154 is pushed outward by the compression spring 158 and the protrusion 156 is inserted into the fixing groove 162, the inner guide 152 is in close contact with the side plate 112 and thus the side plate 112. Through holes 114 formed in the) to prevent the microwave from being emitted.

Meanwhile, a first vent hole 122 corresponding to the shape of the heater 140 is formed in the rear plate 120 of the cooking chamber 110, and a convection fan 130 is installed behind the rear plate 120.

Hereinafter, the operation of the heating apparatus according to the present embodiment.

First, in order to perform the grill function when the heater 140 is in the oven function state, the tray 118 is separated from the protrusion 116 formed below the cooking chamber 110 as shown in FIGS. 2 and 3, and the heater The 140 and the heat insulating plate 142 are rotated downward to be positioned on the bottom surface of the cooking chamber 110. At this time, the protrusion 156 formed on the outer guide 154 of the rotating member 150 rotates away from the fixing groove 162 of the cap 160, and when the heater 140 is located at the bottom of the cooking chamber 110, the compression spring ( The protrusion 156 is inserted into the other fixing hole 162 of the cap 160 by the force pushing the outer guide 154 to fix the rotational position of the heater 140.

In addition, the inner guide 152 positioned inside the cooking chamber 110 is separated from the side plate 112 when the protrusion 156 rotates away from the fixing hole 162, and then the protrusion 156 has another fixing hole 162. Once inserted into the side plate 112 again to prevent the microwave from leaking through the through hole 114 of the side plate (112).

Then, the tray 118 is mounted on the protrusion 116 again.

When the food is placed on the tray 118 and the heater 140 is heated in this state, radiant heat is emitted from the heater 140 to perform a grill function of heating the food.

On the other hand, in order to switch to the oven function in the state in which the heater 140 can perform the grill function, as shown in FIGS. 4 and 5, the tray 118 is separated from the protrusion 116 formed below the cooking chamber 110. The heater 140 and the heat insulating plate 142 are rotated upward to contact the rear surface of the cooking chamber 110, that is, the rear plate 120. At this time, the protrusion 156 formed on the outer guide 154 of the rotating member 150 is deviated from the fixing groove 162 of the cap 160, and the heater 140 is compressed when located in the rear plate 120 of the cooking chamber 110. The protrusion 156 is inserted into the other fixing hole 162 of the cap 160 by the force of the spring 158 pushing the outer guide 154 to fix the heater 140.

In addition, the inner guide 152 positioned inside the cooking chamber 110 is separated from the side plate 112 when the protrusion 156 rotates away from the fixing hole 162, and then the protrusion 156 is attached to the other fixing hole 162. Once inserted, it is in close contact with the side plate 112 to prevent the microwave from leaking into the through hole 114 of the side plate 112.

Then, the tray 118 is mounted on the protrusion 116 again.

In this state, the food is placed on the tray 118, the heater 140 is heated and the convection fan 132 is operated. Radiant heat is radiated from the heater 140 to heat the surrounding air, and the convection fan 132 is used. The heated air is blown into the cooking chamber 110 through the first vent 122 of the rear plate 120 and the second vent 144 of the insulation plate 142 to perform an oven function.

Meanwhile, in addition to the rotatable heater 140, a heater (not shown) may be separately installed on the upper surface of the cooking chamber 110, and the heater 140 of the present embodiment may be positioned on the bottom surface of the cooking chamber 110. Radiant heat is dissipated above and below the cooking chamber 110 to obtain a more powerful heating action.

Hereinafter, a second embodiment of the present invention will be described.

8 is a cross-sectional view of the heating apparatus according to the second embodiment of the present invention.

As shown in FIG. 8, the second embodiment couples the rotating member 150 to the upper edge region of the side plate 112 to rotate the heater 140 to the rear plate 120 and the upper surface of the cooking chamber 110. , The heat insulating plate 142 is coupled to the upper surface of the heater 140. Therefore, when the heater 140 is erected and closely adhered to the rear plate 120 of the cooking chamber 110, the heat insulation plate 142 is positioned at the front of the heater 140 to cover the heater 140, and the heater 140 is rotated upward. In close contact with the upper surface of the cooking chamber 110, the heat insulation plate 142 is positioned on the upper surface of the heater 140 to prevent heat of the heater 140 from being directly transmitted to the ceiling of the cooking chamber 110.

In this case, since the heater 140 is not affected by the tray 118 and the protrusion 116, its shape is not limited.

All other configurations are the same as in the first embodiment, so detailed descriptions are omitted in order to avoid duplicate descriptions.

The operation of the second embodiment will be described below.

First, in order to perform a grill function when the heater 140 is in an oven function state, the heater 140 and the heat insulating plate 142 are rotated upward to be positioned on the upper surface of the cooking chamber 110.

When the food is placed on the tray 118 and the heater 140 is heated in this state, radiant heat is emitted from the heater 140 to perform a grill function of heating the food.

And in order to switch to the oven function in the state in which the heater 140 can perform the grill function, the heater 140 and the heat insulating plate 142 are rotated downward to be positioned in the rear plate 120 of the cooking chamber 110.

In this state, the food is placed on the tray 118, the heater 140 is heated and the convection fan 132 is operated. Radiant heat is radiated from the heater 140 to heat the surrounding air, and the convection fan 132 is used. The heated air is blown into the cooking chamber 110 through the second vent hole 144 of the insulating plate 142 to perform an oven function of heating food.

Meanwhile, in the second embodiment, a heater (not shown) is separately installed on the bottom of the cooking chamber 110 in addition to the rotatable heater 140, and the heater 140 of the present embodiment is positioned on the upper surface of the cooking chamber 110. In this case, radiant heat is dissipated in the upper and lower sides of the cooking chamber 110 during the grill cooking function, thereby obtaining a more powerful heating action.

As described above, the present invention, the rotating member 150 rotatably coupled to the side plate 112 of the cooking chamber 110, both ends of the rotating member 150 is coupled to the heater 140 is installed in the cooking chamber 110. And a heat insulating plate 142 coupled to one side of the heater 140 and having a plurality of second vent holes 144 formed on a surface in contact with the heater 140, by rotating the heater 140. When placed on the rear plate 120 of the cooking chamber 110 is used as a heat source for the convection performs an oven function, when the heater 140 is rotated and placed on the top or bottom surface of the cooking chamber 110 is used as a heat source of radiant heat to draw function Since it can be performed, by using both the grill function and the heat source of the oven function as one heater 140 has the effect of increasing the efficiency of the heater 140 to improve the productivity of the microwave oven.

While the invention has been shown and described with respect to certain preferred embodiments, the invention is not limited to the embodiments described above, but is a field to which the invention pertains without departing from the spirit of the invention as claimed in the utility model registration claims. Anyone of ordinary skill in the art would be able to make various variations.

Claims (5)

A rotating member 150 rotatably coupled to the side plate 112 of the cooking chamber 110; Both ends are coupled to the rotating member 150, the heater 140 is installed in the cooking chamber 110; And And a heat insulating plate 142 coupled to one side of the heater 140 and having a plurality of vent holes 144 formed on a surface in contact with the heater 140. The method of claim 1, wherein the rotating member 150 is coupled to the lower edge region of the side plate 112, so that the heater 140 is rotated to the rear plate 120 and the bottom of the cooking chamber 110. Multifunctional microwave heating device. According to claim 1, The rotating member 150 is coupled to the upper side of the side plate 112, so that the heater 140 is rotated to the rear plate 120 and the upper surface of the cooking chamber 110, characterized in that Microwave heating device. According to claim 1, The rotating member 150, The inner guide 152 is coupled to the heater 140 is located on the inner side of the side plate 112; An outer guide 154 coupled to the heater 140 and positioned on an outer surface of the side plate 112; A compression spring 158 inserted between the side plate 112 and the outer guide 154; And And a cap (160) surrounding the outer side surface of the outer guide (154) and coupled to the outer side surface of the side plate (112). The outer surface of the outer guide 154 is formed with a plurality of protrusions (156) protruding outwardly at regular intervals along the circumferential direction; The cap 160 is a heating device of a multifunctional microwave, characterized in that a plurality of fixing grooves 162 corresponding to the projections (156) is formed.