KR102035810B1

KR102035810B1 - Cooking appliance

Info

Publication number: KR102035810B1
Application number: KR1020130021859A
Authority: KR
Inventors: 심성훈; 하정형; 김완수
Original assignee: 엘지전자 주식회사
Priority date: 2013-02-28
Filing date: 2013-02-28
Publication date: 2019-10-23
Also published as: KR20140107822A

Abstract

The present invention relates to a cooking appliance. In one embodiment, a cooking apparatus includes: a cavity forming a cooking chamber; An electrode disposed inside the cavity; A high frequency oscillator for oscillating high frequency power to be supplied to the electrode; And a tuner connected between the high frequency oscillator and the electrode to effectively transmit the high frequency power output from the high frequency oscillator to the electrode, wherein the electrode is formed by bending a wire or a thin band a plurality of times. do.

Description

Cooking appliance

The present invention relates to a cooking appliance.

In general, a cooking device is a device for cooking food by heating food using a heating source.

Japanese Laid-Open Patent Publication No. 2005-149828 (published June 9, 2005) discloses a high frequency heating device as an example of a cooking apparatus.

The high frequency heating device supplies high frequency to the electrode to dielectrically heat food using an electric field.

Such a conventional high frequency heating apparatus includes a pair of electrode plates. The heated object may be positioned between the pair of electrodes. At this time, since the impedance between the pair of electrodes is variable, it was configured to vary the distance between the pair of electrodes in order to increase the heating efficiency, but this has a complicated structure.

In addition, since the electrode plate is formed in a simple plate shape, since a large electric field strength is formed in the coil constituting the matching circuit, there is a problem that the power consumption is large and the power efficiency is low.

An object of the present invention is to provide a cooking apparatus in which the heating efficiency of food is improved by a simple structure.

Cooking device according to an embodiment of the present invention, the cavity forming the cooking chamber; An electrode disposed inside the cavity; A high frequency oscillator for oscillating high frequency power to be supplied to the electrode; And a tuner connected between the high frequency oscillation unit and the electrode to effectively transmit high frequency power output from the high frequency oscillation unit to the electrode, wherein the electrode is formed by bending a wire or a thin band a plurality of times, and the cavity According to the type of food accommodated in the, characterized in that the length of the electrode to which the high-frequency power is supplied.
Cooking device according to another embodiment of the present invention, a cavity for forming a cooking chamber; An electrode disposed inside the cavity; A high frequency oscillator for oscillating high frequency power to be supplied to the electrode; And a tuner connected between the high frequency oscillator and the electrode to effectively transmit the high frequency power output from the high frequency oscillator to the electrode. A dielectric for increasing an electric field located inside the cavity and radiating to the lower wall of the cavity; And a fixing part provided in the cavity so that the dielectric can be fixed to the cavity while being spaced apart from one wall of the cavity, wherein the electrode is formed by bending a wire or a thin band a plurality of times, and the electrode of the dielectric It is characterized in that it is located above.
Cooking device according to another embodiment of the present invention, a cavity for forming a cooking chamber; An electrode disposed inside the cavity; A high frequency oscillator for oscillating high frequency power to be supplied to the electrode; A tuner connected between the high frequency oscillator and the electrode to effectively transmit high frequency power output from the high frequency oscillator to the electrode; An absorbing member disposed inside the cavity and absorbing an electric field radiated to an upper side of the electrode; And a fixing part fixing the electrode to the cavity, wherein the electrode is formed by bending a wire or a thin band a plurality of times, and the absorbing member is positioned above the electrode, and at least a portion of the electrode is disposed up and down with the electrode. It is characterized in that it is arranged to overlap in the direction.

The electrode may be formed in a spiral shape, a helix shape, or a meander shape.

A reflective member may be provided between the electrode and the upper wall of the cavity.

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According to the proposed invention, since the electrical length of the electrode can be increased, the directivity is improved to reduce the electric field strength of the tuner, the electric field strength of the electrode can be increased. Therefore, the power transfer rate to the electrode compared to the power consumption of the tuner can be improved. In addition, as the electric field strength of the electrode is increased, the heating efficiency may be improved.

1 is a perspective view showing the configuration of a cooking appliance according to a first embodiment of the present invention.
2 is a cross-sectional view of a cooking appliance according to a first embodiment of the present invention.
3 is a perspective view of a cooking appliance according to a first embodiment of the present invention;
4 is a block diagram of a cooking appliance according to a first embodiment of the present invention.
5 is a cross-sectional view of a cooking appliance according to a second embodiment of the present invention.
6 is a cross-sectional view of a cooking apparatus according to a third embodiment of the present invention.
7 is a cross-sectional view of a cooking appliance according to a fourth embodiment of the present invention.

Hereinafter, exemplary embodiments will be described in detail with reference to the accompanying drawings.

1 is a perspective view showing the configuration of a cooking appliance according to a first embodiment of the present invention, Figure 2 is a cross-sectional view of the cooking appliance according to a first embodiment of the present invention, Figure 3 is a first embodiment of the present invention 4 is a perspective view of an electrode, and FIG. 4 is a block diagram of a cooking appliance according to a first embodiment of the present invention.

1 to 4, the cooking apparatus 1 according to the first embodiment of the present invention may include a cavity 10 forming the cooking chamber 11.

Although not shown, the cooking apparatus 1 may further include an outer case provided at the outside of the cavity 10 and a door for opening and closing the cooking chamber 11.

The cavity 10 may be formed in a rectangular parallelepiped shape with an open front surface, but is not limited thereto. The cavity 10 may include an upper wall 101, a lower wall 102, and a circumferential wall 105 connecting the upper wall 101 and the lower wall 102. The circumferential wall 105 may include both side walls and the rear wall.

The cooking apparatus 1 is a power supply unit 41 for supplying power, electrically connected to the power supply unit 41, a high frequency oscillation unit 42 for oscillating a high frequency, and supplies a voltage of the high frequency A control unit for controlling the receiving electrode 20, the tuner 30 for efficiently transferring power from the high frequency oscillator 42 to the electrode 20, and the high frequency oscillator 42 and the tuner 30. 40).

The electrode 20 may be disposed at a position spaced apart from the upper wall 101 and the lower wall 102 in the cavity 10, and may be disposed adjacent to the upper wall 101. That is, the distance between the electrode 20 and the upper wall 101 is shorter than the distance between the electrode 20 and the lower wall 102 of the cavity 10. Thus, food may be located between the electrode 20 and the lower wall 102 of the cavity 10. The cavity 10 is grounded.

The electrode 20 serves as a positive electrode, and the lower wall 102 of the cavity 10 serves as a negative electrode.

The electrode 20 may be formed in a spiral shape, a helix shape, or a meander shape as shown in FIG. 3 to improve directivity within a limited size (or area). That is, the electrode 20 may be formed by bending a plurality of thin wire or strip plates.

According to this embodiment, since the electrical length of the electrode 20 can be increased, the directivity is improved to reduce the electric field strength of the tuner 30, the electric field strength of the electrode can be increased. Therefore, the power transfer rate to the electrode 20 compared to the power consumption of the tuner 30 can be improved. In addition, as the electric field strength of the electrode 20 is increased, heating efficiency may be improved.

The electrode 20 may be fixed to the cavity 10 by a fixing part. The fixing part may include a first fixing part 21 for supporting an edge of the electrode 20 and one or more second fixing parts 22 for supporting an intermediate portion of the electrode 20. Each of the fixing parts 21 and 22 may include a ring 23 for supporting the electrode 20.

In the present embodiment, since the wire or thin strip is bent a plurality of times in order to increase the electrical length, the amount of deflection may be increased as compared with the plate-shaped electrode. In this embodiment, the electrode 20 By supporting not only the edge of the center portion of the electrode 20, the amount of deflection can be minimized.

The tuner 30 may include an inductor 31 and a capacitor 32. The inductor 31 may be a variable inductor (coil), and the capacitor 32 may be a variable capacitor.

The tuner 30 is disposed outside the cavity 10. The inductor 31 is connected to the electrode 20 through the cavity 10. For example, the tuner 30 may be located above or above one side of the cavity 10. The tuner 30 is for impedance matching of the high frequency oscillator 42 and the electrode 20, and may be implemented by a known technique, and thus a detailed description thereof will be omitted.

The operation of the cooking appliance 1 will be described.

The high frequency power oscillated by the high frequency oscillator 41 is supplied to the electrode 20 through the tuner 30. Then, an electric field E is generated in the cooking chamber 11, and the food F between the electrode 20 and the lower wall 102 of the cavity 10 is dielectrically heated.

5 is a cross-sectional view of a cooking appliance according to a second embodiment of the present invention.

This embodiment is the same as the first embodiment in other parts, but is characterized in that the configuration is further provided for increasing the electric field provided to the food side. Hereinafter, only the characteristic parts of the present embodiment will be described, and the same parts as the previous embodiments will use the contents of the first embodiment.

Referring to FIG. 5, a metal reflective member 50 may be provided between the upper wall 101 of the cavity 10 and the electrode 20.

The electric field E is generated in the cooking chamber 11 as a whole. The greater the electric field between the electrode 20 and the lower wall of the cavity 10 in the electric field E, the higher the heating efficiency of the food. On the other hand, an electric field may be generated between the electrode 20 and the upper wall 101 of the cavity 10, but this electric field hardly affects the heating of food.

Therefore, in the present embodiment, as the reflective member 50 is provided between the electrode 20 and the upper wall 101 of the cavity 10, the upper wall of the electrode 20 and the cavity 10 ( Since the electric field between the 101 may be reflected by the reflective member 50 to the food side, there is an advantage that the heating efficiency is improved.

6 is a cross-sectional view of a cooking appliance according to a third embodiment of the present invention.

Referring to FIG. 6, a dielectric 60 may be provided below the electrode 20. That is, the dielectric 60 may support the lower side of the electrode 20.

The dielectric 60 may be formed of ceramic or plastic material. Since the size of the electric field radiated from the electrode 20 to the lower wall 102 side of the cavity 10 is increased by the dielectric material 60, the heating efficiency may be improved. There is an advantage.

7 is a cross-sectional view of a cooking appliance according to a fourth embodiment of the present invention.

Referring to FIG. 7, an absorbing member 70 may be provided above the electrode 20. For example, the absorbing member may be a ferrite sheet 70. The electrode 20 may be fixed by the fixing part in a state in which the absorbing member 70 is placed above the electrode 20.

The absorbing member 70 serves to absorb an electric field radiated from the electrode 20 to the upper wall 101 of the cavity 10.

The size of the electric field radiated from the electrode 20 toward the lower wall 102 may be increased, thereby improving heating efficiency. In order to increase the size of the electric field radiated toward the lower wall 102 of the cavity 10, the size of the electric field radiated to the upper wall 102 of the cavity 10 must be small. According to the present invention, the absorbing member 70 absorbs an electric field radiated from the electrode 20 to the upper wall 101 of the cavity 10, and thus, the lower wall 102 at the electrode 20 relatively. The magnitude of the electric field radiated to the side may be increased to improve heating efficiency.

This embodiment may further include the following embodiments.

The cavity may further include a movable tuner. The tuner may be moved based on the impedance of the electrode to change the connection point between the tuner and the electrode. In this case, since the length of the electrode connected to the tuner may vary according to the movement of the tuner, it may be easy to respond to the type of food.

10: cavity 20: electrode
30: Tuner

Claims

A cavity forming a cooking chamber;
An electrode disposed inside the cavity;
A high frequency oscillator for oscillating high frequency power to be supplied to the electrode; And
A tuner connected between the high frequency oscillator and the electrode to effectively transmit the high frequency power output from the high frequency oscillator to the electrode,
The electrode is formed by bending a wire or a thin band a plurality of times,
And a length of the electrode to which high frequency power is supplied varies according to the type of food accommodated in the cavity.

A cavity forming a cooking chamber;
An electrode disposed inside the cavity;
A high frequency oscillator for oscillating high frequency power to be supplied to the electrode;
A tuner connected between the high frequency oscillator and the electrode to effectively transmit high frequency power output from the high frequency oscillator to the electrode;
A dielectric for increasing an electric field located inside the cavity and radiating to the lower wall of the cavity; And
And a fixing part provided in the cavity so that the dielectric can be fixed to the cavity while being spaced apart from one wall of the cavity.
The electrode is formed by bending a wire or a thin band a plurality of times,
And the electrode is positioned above the dielectric.

A cavity forming a cooking chamber;
An electrode disposed inside the cavity;
A high frequency oscillator for oscillating high frequency power to be supplied to the electrode;
A tuner connected between the high frequency oscillator and the electrode to effectively transmit high frequency power output from the high frequency oscillator to the electrode;
An absorbing member disposed inside the cavity and absorbing an electric field radiated to an upper side of the electrode; And
And a fixing part fixing the electrode to the cavity.
The electrode is formed by bending a wire or a thin band a plurality of times,
The absorbing member is located above the electrode, cooking apparatus, characterized in that arranged at least a portion overlapping with the electrode in the vertical direction.

The method according to any one of claims 1 to 3,
The electrode may be formed in a spiral shape, helix shape or meander shape.

The method according to claim 1 or 2,
And a reflecting member between the electrode and the upper wall of the cavity.