KR19990049632A - microwave - Google Patents

Abstract

The present invention relates to a microwave oven, and an object thereof is to provide a waveguide plate having a plurality of waveguides formed thereon so that high frequency passes through the upper side of the cooking chamber, and provide a variable vane that rotates to close a portion of the waveguides. The present invention relates to a microwave oven in which high-frequency even irradiation is performed inside a cooking chamber.

The microwave oven of the present invention is installed at one side of a case in which a cooking compartment and an electrical equipment compartment are partitioned therein and have an inlet provided at the electrical equipment compartment side and an outlet provided at the cooking compartment side to transmit high frequency oscillations from the electrical equipment compartment to the cooking compartment. A waveguide, a waveguide plate having a plurality of waveguides through which a high frequency passes, and a variable wing rotatably installed to close a portion of the waveguide, are provided between the waveguide, the exit portion, and the cooking chamber. Since the dispersion direction of the high frequency irradiated to the cooking chamber is changed by the variable vanes which rotate and close, the high frequency is evenly distributed inside the cooking chamber, thereby enabling the heating of food evenly.

Description

microwave

The present invention relates to a microwave oven, and more particularly, to provide a waveguide plate provided with a plurality of waveguides on the upper side of the cooking chamber, and to provide a variable wing rotatably installed to close a portion of the waveguide, thereby to produce a high frequency wave inside the cooking chamber. It is about a microwave oven in which even irradiation is carried out.

In general, a microwave oven is a cooker applying the principle that food in a metal case generates heat by its own molecular motion by using an electromagnetic wave of approximately 2,450 MHz. In such a microwave, radio waves of about 2,450 MHz are oscillated in the magnetron and induced into the case, and the molecules constituting the food are charged with + and-by the induced high frequency. At this time, one side of the molecule is charged with-on the + side of the electric field due to radio waves, and the other side of the molecule is charged with + on the-side of the electric field. However, since the polarity of the electric field changes 2.45 billion times per second due to high frequency radio waves, food molecules are severely collided with each other, causing frictional heat to heat the food.

1 is a side cross-sectional view of a conventional microwave oven. As shown in the figure, inside the case 1 forming the exterior, the cooking chamber 2 in which food is accommodated and cooked and a component for cooking food by irradiating high frequency to the food stored in the cooking chamber 2 are accommodated. The electrical equipment compartment 3 is provided separately.

The cooking chamber 2 is formed on one side of the case 1 to accommodate food therein. The cooking chamber 2 is coupled to the case 1 by a hinge (not shown) on the front of the cooking chamber 2. The door 4 for opening and closing the door is rotatably installed.

The electrical equipment room 3 is a space in which various electrical equipments are installed, and a high-voltage capacitor (not shown) and a high-voltage transformer 3a that are boosted to a high voltage by receiving an external commercial voltage are provided below the electrical equipment room 3, On the upper side of the electronics compartment 3, a magnetron 3b for receiving a high pressure transmitted from the high voltage transformer 3a and oscillating a high frequency of 2,450 MHz is provided.

On the other hand, the waveguide 5 for guiding the high frequency oscillated by the magnetron 3b into the cooking chamber 2 inside the cooking chamber 2 extends outside the upper portion of the cooking chamber 2.

The waveguide 5 has an inlet portion 5a provided on the upper side of the electrical equipment compartment 3 connected to the magnetron 3b, and is spaced apart from the upper side plate of the case 1 by a predetermined distance to the upper side of the cooking chamber 2. The outlet part 5b which extends and communicates with the cooking chamber 2 is formed.

The driving of the conventional microwave oven configured as described above receives the high voltage applied from the high voltage transformer 3a and oscillates 2,450Mhz of high frequency waveguide 5 in the magnetron 3b to the waveguide 5 and the high frequency wave guided through the waveguide 5 is a cooking chamber. (2) It is irradiated into the cooking chamber 2 through the exit part 5b of the upper part. At this time, the high frequency is irradiated to the food to vibrate the food molecules 2.4 billion times a second, the food is cooked by the heat generated by the vibration of the food molecules.

However, such a conventional microwave oven is irradiated only in a certain direction when the high frequency oscillated from the magnetron is transmitted through the waveguide and irradiated into the cooking chamber. This causes the food to receive a lot of high frequency and less receiving part, which causes the food to burn or less cooked depending on the part. That is, there is a problem that the food is not evenly cooked as a whole.

The present invention is to solve such a problem, an object of the present invention is to provide a waveguide plate formed with a waveguide through which a high frequency passes on the upper side of the cooking chamber, and to provide a variable wing that rotates to close a part of the waveguide. The present invention relates to a microwave oven in which high-frequency even irradiation is performed inside a cooking chamber.

Figure 1 is a side cross-sectional view showing the overall configuration of a conventional microwave oven.

Figure 2 is a side cross-sectional view showing the overall configuration of a microwave oven according to the present invention.

FIG. 3 is a bottom view of the waveguide in the direction “A” of FIG. 2.

Explanation of symbols on the main parts of the drawings

10: Case 20: Cooking room

21: ceiling 30: electric equipment room

32: magnetron 50: waveguide

51: entrance part 52: exit part

60: waveguide 61: waveguide

70: motor 71: motor shaft

80: variable wings

The microwave oven according to the present invention for achieving the above object is provided with a case in which a cooking compartment and an electrical equipment compartment are partitioned inside, an inlet portion provided at one side of the case and provided at the electrical equipment compartment side and an outlet portion provided at the cooking compartment side. In the microwave oven provided with a waveguide for transmitting a high frequency oscillating from the electrical equipment chamber to the cooking chamber, a waveguide plate formed with a plurality of waveguides through which the high frequency passes through the outlet portion and the cooking chamber, the waveguide is rotated It is characterized in that part is closed by a variable wing installed to be possible.

In addition, the variable wing is characterized in that coupled to the motor rotates on the outside of the waveguide.

Hereinafter, one preferred embodiment according to the present invention will be described in detail with reference to the drawings.

2 is a side cross-sectional view showing the overall configuration of a microwave oven according to the present invention, Figure 3 is a bottom view of the waveguide viewed from the "A" direction of FIG.

The microwave oven of the present invention is provided with a case 10 forming an appearance as shown in FIG. 2, and the food is stored in the cooking chamber 20 and the cooking chamber 20 in which food is stored and cooked inside the case 10. The electrical equipment compartment 30 which accommodates the components for cooking food by irradiating the high frequency to the prepared food is partitioned and provided in front and rear.

The cooking chamber 20 is formed in a box shape in front of the inside of the case 10 to accommodate food therein. The cooking chamber 20 is coupled to the case 10 by a hinge (not shown) on the front of the cooking chamber 20. The door 40 that opens and closes 20 is rotatably installed so that the front surface is closed when the door 40 is closed.

The electrical equipment room 30 is a space in which various electronic equipment is installed, and a high voltage capacitor (not shown) and a high voltage transformer 31 for boosting the voltage to a high voltage by receiving an external commercial voltage are installed at the lower side of the electrical equipment room 30. The magnetron 32 which receives the high pressure transmitted from the high voltage transformer 31 and oscillates a high frequency of 2,450 MHz is installed above the electrical equipment room 30.

Discharge ducts 12 are provided above the cooking chamber 20 and the electrical equipment compartment 30. The discharge duct 12 is the air flowing through the suction chamber 11 provided in the lower side of the cooking chamber 20 and the electrical equipment compartment 30 flows out to the electrical equipment compartment 30 through the cooking chamber 20 to the outside. Inside the discharge duct 12, a waveguide 50 is provided to communicate the electrical equipment compartment 30 and the cooking compartment 20.

The waveguide 50 is installed inside the duct formed above the cooking chamber 20 and the electrical equipment compartment 30 to guide the high frequency generated by the magnetron 32 into the cooking chamber 20. It is installed on the rear wall and the other end is in contact with the ceiling surface 21 of the cooking chamber 20 side, the middle side is provided at a predetermined distance between the upper surface of the case 10.

That is, the outlet portion 52 extending from the inlet portion 51 connected to the magnetron 32 provided on the upper side of the electrical equipment compartment 30 toward the cooking chamber 20 and bent in a smooth curve on the upper side of the cooking chamber 20 is formed. do.

On the other hand, the waveguide plate 60 is provided on the upper side of the cooking chamber 20 to separate the cooking chamber 20 up and down spaced apart from the outlet 52. The waveguide 60 is a material that cannot transmit high frequency, and reflects when the high frequency is moved to change the moving direction of the high frequency. In addition, a plurality of waveguides 61 are provided inside the waveguide 60 so that high frequency passes. The waveguide 61 is provided in a rectangular shape in all directions and communicates with the cooking chamber 20, and is moved between the ceiling surface 21 of the cooking chamber 20 and the waveguide 60 through the outlet 52. The high frequency acts as a passage through which the cooking chamber 20 can be moved.

In addition, between the outlet portion 52 and the waveguide 60, a variable blade 80 that rotates to close a part of the waveguide 61 is provided with a motor 71.

The motor 71 is coupled to the upper outer side of the outlet portion 52 side of the waveguide 50 so that the motor shaft 71 extending from the inside to the outside is disposed downward. In addition, since the motor 71 is connected to a microcomputer (not shown) and rotates at a predetermined speed during the operation of the microwave oven, the waveguides 61 provided in all directions are closed one by one, the high frequency dispersion hits the rear surface of the variable wing 80. To change direction.

The motor shaft 71 of this motor 71 penetrates the waveguide 50 and extends to approach the waveguide plate 60 located below the outlet portion 52 of the waveguide 50. At the tip of the motor shaft 71, a variable blade 80 for closing a part of the waveguide 61 is provided. This will be described with reference to FIG. 3. As shown, the waveguide 60 is provided with a waveguide 61 symmetrically opened in all directions. The motor shaft 71 is disposed at the center side of the waveguide 61, and the variable blade 80 is fixedly installed at the tip of the motor shaft 71 to rotate due to the motor 71. The variable wing 80 is provided with a size capable of closing the open waveguide 61 while extending from the side engaged with the motor shaft 71 to the outside and four waveguides (when the motor 71 rotates). One of them will be closed.

The driving of the conventional microwave oven configured as described above receives the high pressure applied from the high voltage transformer 31 and oscillates the high frequency of 2,450Mhz to the waveguide 50 in the magnetron 32 and the high frequency guided through the waveguide 50 exits. It moves to the waveguide 60 through the unit 52. Then, the variable wing 80 rotated by the motor 71 is irradiated to the cooking chamber 20 through the other waveguide 61 except for the waveguide 61 blocked by the variable blade 80. As a result, the high frequency wave moved to the blocked waveguide 61 is hit in the direction of the variable blade 80 and is irradiated in the changed direction through the open waveguide 61. The high frequency wave is rotated by the variable blade 80. Since the dispersion direction is continuously changed, the direction of the high frequency irradiated into the cooking chamber 20 is continuously changed, and the irradiation of the high frequency is uniformly performed inside the cooking chamber 20. At this time, the high frequency is irradiated to the food to vibrate the food molecules 2.25 billion times per second, the food is cooked by the heat generated by the vibration of the food molecules in the microwave oven of the present invention the interior of the cooking chamber 20 Since the high frequency is evenly irradiated, a part of the food stored in the cooking chamber 20 may prevent burning or undercooking due to excessive or insufficient high frequency, thereby achieving uniform cooking throughout the food.

As described in detail above, the microwave oven according to the present invention changes the dispersion direction of the high frequency irradiated into the cooking chamber by the variable wing rotating while closing the waveguide and a part of the waveguide provided in the waveguide, so that the high frequency is evenly distributed inside the cooking chamber. Because of this, even heating of food is possible, there is an advantage that can maintain the optimum cooking state.

Claims (2)

A case in which a cooking compartment and an electrical equipment compartment are partitioned therein, and an inlet portion provided on one side of the case and an outlet portion provided on the side of the electrical appliance compartment, and an outlet provided on the cooking compartment side, transmit high frequency oscillated from the electrical equipment compartment to the cooking compartment. In a microwave oven provided with a waveguide, A microwave oven, wherein a waveguide plate having a plurality of waveguides through which high frequency passes is installed between the outlet portion and the cooking chamber, and the waveguide is partially closed by a variable wing installed to be rotatable. The method of claim 1, The variable blade is microwave oven, characterized in that coupled to the motor is provided on the outside of the waveguide.