KR102037310B1

KR102037310B1 - Cooking appliance

Info

Publication number: KR102037310B1
Application number: KR1020130021861A
Authority: KR
Inventors: 심성훈; 하정형; 김완수
Original assignee: 엘지전자 주식회사
Priority date: 2013-02-28
Filing date: 2013-02-28
Publication date: 2019-10-28
Also published as: KR20140107824A

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 oscillation unit and the electrode, the tuner having an inductor and a condenser to effectively transmit the high frequency power output from the high frequency oscillation unit to the electrode, wherein the inductor is located inside the cavity. 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. 2005-56781 (published March 3, 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.

In such a conventional high frequency heating apparatus, one electrode is disposed adjacent to an upper surface as an example in a heating chamber. Food is placed below the electrode. In this case, when a high frequency is supplied to the electrode, an electric field is formed between the electrode in the heating chamber and the wall of the heating chamber.

An outside of the heating chamber is provided with an impedance matching circuit (hereinafter referred to as a "matching circuit") for efficiently delivering power from a high frequency power supply to a load. The matching circuit includes a resonant capacitor and a resonant variable coil.

According to the conventional high frequency heating apparatus, the matching circuit is provided in a specific space outside the heating chamber, and since the volume of the resonant variable coil is large, the high frequency heating apparatus is located in order to locate the resonant variable coil. Unnecessarily bulky problem occurs.

An object of the present invention is to provide a cooking apparatus capable of reducing the overall volume.

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 oscillation unit and the electrode, the tuner having an inductor and a condenser to effectively transmit high frequency power output from the high frequency oscillation unit to the electrode, wherein the hole is formed in the electrode. The inductor is positioned in the hole, one end of the inductor is connected to the high frequency oscillator, and the other end of the inductor is connected to the electrode.

The hole may extend in a spiral shape, a helix shape or a meander shape.

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The inductor may be arranged in a spiral shape, helix shape or meander shape to be located in the hole.

According to the proposed invention, since the inductor constituting the tuner is located inside the cavity, the volume of the tuner can be reduced, thereby reducing the space in which the tuner is located in the cooker, thereby reducing the external volume of the cooker. There is this.

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 block diagram of a cooking appliance according to a first embodiment of the present invention.
4 is a view showing an arrangement of an electrode and an inductor according to a second embodiment of the present invention.
5 is a view illustrating an arrangement of an electrode and an inductor according to a third 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 A block diagram of a cooking appliance is shown.

1 to 3, the cooking apparatus 1 according to an 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 include a plate 21 and a fixing part 22 extending from the plate 21 and fixed to the upper wall 101 of the cavity 10.

The fixing part 22 may be combined with or integrally formed with the plate 21. In FIG. 2, the fixing part 22 is fixed to the upper wall 101 of the cavity 10, but may be fixed to the circumferential wall 105 of the cavity 10.

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

The condenser 32 may be located outside the cavity 10. That is, the condenser 32 may be located between the cavity 10 and the outer case. On the other hand, the inductor 31 may be located inside the cavity 10.

In detail, the inductor 31 may be disposed between the electrode 20 and the upper wall 101 of the cavity 10.

As described above, since the electrode 20 is spaced apart from the upper wall 101 of the cavity 10, a space 106 is formed between the electrode 20 and the upper wall 101 of the cavity 10. do. Since the food cannot be placed in the space 106, the inductor 31 connected to the electrode 20 may be located in the space 106. And, the height of the inductor 32 from the lower wall 102 of the cavity 10 is higher than the height of the electrode 20 from the lower wall 102.

Since the inductor 31 may be located in the space 106 between the electrode 20 in the cavity 10 and the upper wall 101 of the cavity 10, the inductor 31 may be located in the cavity 10. Since the inductor 31 does not need to be positioned between the outer cases, the space between the cavity 10 and the outer case can be reduced, thereby reducing the total volume of the cooker.

In addition, an arc may occur because a very large voltage is applied to the inductor 31, and other electric components around the inductor 31 may operate due to the generated arc when the inductor 31 is located outside the cavity. It can be error or damaged. However, in the case of the present invention, since the inductor 31 is located in the cavity 10, an error or damage of an external electrical component of the cavity can be prevented.

In addition, when the inductor 31 is located outside the cavity, one end of the inductor 31 passes through the cavity 10 to connect the inductor 31 and the electrode 20. Since a very large voltage is applied to the inductor 31 passing through the hole formed in 10), an arc may occur in the hole portion. However, according to the present invention, since the inductor 31 is located in the cavity 10, arc generation can be minimized.

The operation of the cooking appliance 1 will be described briefly.

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.

4 is a diagram illustrating an arrangement of an electrode and an inductor according to a second embodiment of the present invention, and FIG. 5 is a diagram illustrating an arrangement of an electrode and an inductor according to a third embodiment of the present invention.

The second embodiment and the third embodiment are the same as in the previous embodiment in other parts, except that there is a difference in arrangement of electrodes and inductors. Therefore, hereinafter, only characteristic parts of the present embodiment will be described, and the same parts as the previous embodiment will use the contents of the previous embodiment.

First, referring to FIG. 4, the electrode 23 of the second embodiment may be formed in a flat plate shape.

The electrode 23 is formed with a hole 24 in which the inductor 31 is located. The hole 24 extends along each corner at one end of the electrode 23 and extends toward the center of the electrode 23. That is, the hole 24 may extend in a spiral or helix or meander shape on the plane of the electrode 23. Therefore, since the inductor 31 is positioned in the hole 24, the inductor 31 may also be arranged in a spiral, helix or meander shape like the hole 24. have.

Next, referring to FIG. 5, a hole 26 in which the inductor 31 is positioned may also be formed in the electrode 25 of the third embodiment. In this case, the hole 26 may be formed to be biased to a portion of the electrode 25.

According to the second and third embodiments, since the inductor 31 may be positioned in a hole formed in the electrode, the space between the electrode and the upper wall 101 of the cavity 10 is narrow. In addition, the inductor 31 may be located in the cavity 10.

At this time, the height from the lower wall 102 of the cavity 10 to the electrode 20 is the same as the height from the lower wall 102 to the inductor 31.

Since holes 24 and 26 are formed in the electrodes 23 and 25 in the second and third embodiments, the electrodes 23 and 25 are bent by the holes 24 and 26. It can be understood to include. That is, some of the electrodes 23 and 25 may be disposed in a spiral shape, a helix shape, or a meander shape.

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, the tuner having an inductor and a condenser to effectively transmit the high frequency power output from the high frequency oscillator to the electrode,
The electrode is formed with a hole for the inductor is located,
The inductor is located in the hole,
One end of the inductor is connected to the high frequency oscillator, and the other end of the inductor cooking apparatus, characterized in that connected to the electrode.

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The method of claim 1,
The hole is a cooking apparatus extending in a spiral shape, helix shape or meander shape.

The method of claim 1,
The inductor is arranged in a spiral, helix shape or meander shape to be disposed in the hole.