KR101816214B1 - Multiple antennas for oven capable of uniform heating and oven using the same - Google Patents

Abstract

Various embodiments of the present invention relate to multiple antennas for an oven capable of uniform heating and an oven using the same. An object of the present invention is to provide multi-antennas for an oven capable of uniformly heating a cooking object by generating a plurality of hot spots using two, four or more antennas, and an oven using the same. To this end, the present invention provides multiple antennas comprising a first antenna disposed on the inner surface of a cooking cavity and a second antenna disposed on the inner surface of the cooking cavity to be spaced apart from the first antenna, and an oven using the same.

Description

[0001] The present invention relates to an oven multi-antenna and an oven using the oven,

Various embodiments of the present invention relate to an oven multi-antenna capable of uniform heating and an oven using the same.

1A and 1B, a conventional microwave oven generates an electric field in a predetermined direction through a waveguide, and a turntable is installed inside the cooking cavity to uniformly disperse the electric field in the cooking cavity. , And the object is rotated 360 degrees by a synchronous motor to uniformly heat the object to be cooked.

Accordingly, the microwave oven and the microwave oven have various restrictions in terms of movement, installation, and use of the motor, and can not control precisely cooking or variously control the output of the microwave oven (unconditionally, full power And the turntable is mechanically turned back), unnecessarily consuming excessive energy.

2A and 2B, even if a conventional microwave oven does not use a turntable, by using a method of scattering an electric field by mounting a strainer directly below a waveguide on an upper surface of the same waveguide, One heating was planned. However, since such a stratosphere eventually exists only in the upper part, it uses a motor and radiates a single full power and distributes it. Therefore, the principle and the method of using the turntable are similar to each other.

As described above, in the conventional microwave oven, a hot spot is formed only in one place by using a waveguide. In order to compensate for this, a microphone and a motor should be additionally installed on the lower part of the microwave oven, There was a problem.

In addition, since the waveguide is a relatively large mechanical structure in the conventional microwave oven, it is difficult to install the waveguide in a limited space. In addition, the conventional microwave oven is operated only at full power (instead, it is controlled only by on-off switching), so that a large current consumption is inevitably required. Further, the conventional microwave oven uses only a single frequency (for example, 2450 MHz), so that various cooking modes can not be realized.

The above-described information disclosed in the background of the present invention is only for improving the understanding of the background of the present invention, and thus may include information not constituting the prior art.

The object of the present invention is to provide an oven multi-antenna capable of uniformly heating a cooking object by generating a plurality of hot spots in the cooking cavity using two, four or more multiple antennas, and an oven using the same have.

It is another object of the present invention to provide an oven multiple antenna capable of uniformly heating a cooking object by controlling the wavelength or beam forming of an electromagnetic wave in a time division manner by varying a phase with multiple antennas, To provide a used oven.

Another object of the present invention is to provide an oven multi-antenna capable of optimizing power and dramatically reducing current consumption by varying power (output) for each antenna as needed, and an oven using the same.

Another object of the present invention is to provide an oven multiple antenna capable of various cooking modes by selectively using various frequencies (for example, 13.56 MHz, 27 MHz, 40 MHz, 433 MHz, 915 MHz, 2450 MHz, And to provide an oven using the same.

Various embodiments of the present invention include a first antenna mounted on an inner surface of a cooking cavity; And a second antenna disposed on the inner surface of the cooking cavity so as to be spaced apart from the first antenna, wherein the first and second antennas are installed parallel to each other, spaced apart from the inner surface of the cooking cavity, A square patch portion of the shape; A pair of first ground strips in the form of a rectangular plate, each of which is provided at both opposite sides of the rectangular patch portion and at both lower edges thereof; A second grounding strip in the form of a square plate having a width, which is provided at the lower center of the rectangular patch portion; And a cylindrical feed part having a diameter provided in an area of the rectangular patch part facing the second ground strip between the pair of first ground strips, wherein a width of the first and second ground strips Disclosed is an oven multi-antenna capable of heating uniformly larger than the diameter of the feeding part.

The phases applied to the first and second antennas may be different from each other.

The powers applied to the first and second antennas may be different from each other.

The frequencies applied to the first and second antennas may be different from each other.

Wherein the first and second antennas are disposed parallel to each other and spaced apart from the inner surface of the cooking cavity, the rectangular patch having a length and a width; A pair of first grounding strips provided on opposing opposite sides of the rectangular patch portion and at lower edges of both sides; A second grounding strip provided at the lower center of the rectangular patch portion; And a feeder disposed in an area of the square patch portion facing the second grounding strip between the first grounding strip

The inner surface of the cooking cavity comprises a door surface; A rear surface opposed to the door surface; A seating surface and a right surface provided respectively on the left and right sides between the door surface and the rear surface; And upper and lower surfaces provided respectively on upper and lower sides between the door surface and the rear surface.

The first and second antennas may be installed on the upper surface, the first antenna may be installed on the upper surface, and the second antenna may be installed on the seating surface or the right surface.

The various embodiments of the present invention further include third and fourth antennas, wherein the third and fourth antennas are installed on the upper surface, the third antenna is installed on the rear surface, It can be installed on the opposite side.

The phase difference between the first and second antennas may be between 0 and 180 degrees.

The power difference between the first and second antennas may be between 0 watts and 3000 watts.

The first and second antennas can output electromagnetic waves having frequencies of 10 MHz to 10 GHz, respectively.

Various embodiments of the present invention include a power supply for supplying DC power; A control unit receiving power from the power supply unit and outputting a frequency control signal and an amplification control signal, respectively; A signal generator for receiving the frequency control signal of the controller and outputting an electromagnetic wave signal; A first power amplifier for receiving an electromagnetic wave signal from the signal generator and an amplification control signal from the controller to amplify the electromagnetic wave and output the amplified electromagnetic wave to the first antenna; And a second power amplifier for receiving an electromagnetic wave signal from the signal generator and an amplification control signal from the controller, respectively, and amplifying the electromagnetic wave and outputting the amplified electromagnetic wave to the second antenna.

A first phase shifter which is phase-shifted by the control unit is connected between the signal generating unit and the first power amplifying unit, and a second phase shifter which is phase-shifted by the control unit is connected between the signal generating unit and the second power amplifying unit. A phase shifter can be connected.

An embodiment of the present invention provides an oven multi-antenna capable of uniformly heating a cooking object by generating a plurality of hot spots in a cooking cavity using two, four, or more multiple antennas, and an oven using the same.

In another embodiment of the present invention, the wavelength of the electromagnetic wave or the beam forming is controlled in a time division manner by varying (or shifting) the phase with the multiple antennas so that the oven multi- An antenna and an oven using the same.

Another embodiment of the present invention provides an oven multi-antenna capable of optimizing power by dramatically reducing power consumption by varying the power (output) for each antenna as needed, and an oven using the same.

Yet another embodiment of the present invention is an oven multi-antenna capable of various cooking modes by selectively using various frequencies (e.g., 13.56 MHz, 27 MHz, 40 MHz, 433 MHz, 915 MHz, 2450 MHz, Provide an oven.

1A and 1B are perspective views showing a conventional synchronous motor for rotating a microwave oven and a lower turntable.
FIGS. 2A and 2B are schematic views showing the operation of a synchronous motor for rotating the upper strut of a conventional microwave oven.
3 is a block diagram showing an electrical configuration of an oven capable of uniform heating according to various embodiments of the present invention.
4A and 4B are a perspective view and a side view showing an example of a multi-antenna for oven capable of uniform heating according to various embodiments of the present invention.
5A and 5B are diagrams showing an arrangement of multiple antennas for ovens capable of heating uniformly according to various embodiments of the present invention.
6A and 6B are graphs illustrating the concept of phase control of an oven multi-antenna capable of uniform heating according to various embodiments of the present invention.
7 is a graph showing reflection coefficient characteristics of an oven multi-antenna capable of uniform heating according to various embodiments of the present invention.
FIGS. 8A and 8B are diagrams illustrating simulation results of phase variation of an oven multiple antenna capable of uniform heating according to various embodiments of the present invention. FIG.
FIGS. 9A and 9B are block diagrams and multi-antenna array structures illustrating an electrical configuration of an oven capable of uniform heating according to various embodiments of the present invention.
10A and 10B are views showing an arrangement structure of an oven multi-antenna capable of uniform heating according to various embodiments of the present invention.
11 is a perspective view showing an example of an oven capable of uniform heating installed in a refrigerator according to various embodiments of the present invention.

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

The embodiments of the present invention are described in order to more fully explain the present invention to those skilled in the art, and the following embodiments may be modified into various other forms, It is not limited to the embodiment. Rather, these embodiments are provided so that this disclosure will be more faithful and complete, and will fully convey the scope of the invention to those skilled in the art.

In the following drawings, thickness and size of each layer are exaggerated for convenience and clarity of description, and the same reference numerals denote the same elements in the drawings. As used herein, the term "and / or" includes any and all combinations of one or more of the listed items. In the present specification, the term " connected "means not only the case where the A member and the B member are directly connected but also the case where the C member is interposed between the A member and the B member and the A member and the B member are indirectly connected do.

The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the singular forms "a," "an," and "the" include singular forms unless the context clearly dictates otherwise. Also, " comprise, " and / or "comprising, " when used in this specification, are intended to be interchangeable with the said forms, numbers, steps, operations, elements, elements and / And does not preclude the presence or addition of one or more other features, integers, operations, elements, elements, and / or groups.

Although the terms first, second, etc. are used herein to describe various elements, components, regions, layers and / or portions, these members, components, regions, layers and / It is obvious that no. These terms are only used to distinguish one member, component, region, layer or section from another region, layer or section. Thus, a first member, component, region, layer or section described below may refer to a second member, component, region, layer or section without departing from the teachings of the present invention.

It is to be understood that the terms related to space such as "beneath," "below," "lower," "above, But may be utilized for an easy understanding of other elements or features. Terms related to such a space are for easy understanding of the present invention depending on various process states or use conditions of the present invention, and are not intended to limit the present invention. For example, if an element or feature of the drawing is inverted, the element or feature described as "lower" or "below" will be "upper" or "above." Thus, "lower" is a concept encompassing "upper" or "lower ".

In addition, the controller (controller) and / or other associated equipment or components in accordance with the present invention may be implemented using any suitable hardware, firmware (e.g., custom semiconductor), software, or any appropriate combination of software, . For example, the various components of a controller (controller) and / or other associated equipment or components in accordance with the present invention may be formed on one integrated circuit chip or on a separate integrated circuit chip. In addition, the various components of the controller (controller) may be implemented on a flexible printed circuit film and formed on the same substrate as the tape carrier package, printed circuit board, or controller (controller). In addition, the various components of the controller (controller) may be a process or thread executing on one or more processors in one or more computing devices, which executes computer program instructions to perform various functions, And interact with other components. The computer program instructions are stored in a memory that can be executed on a computing device using standard memory devices, such as, for example, random access memory. The computer program instructions may also be stored in other non-transitory computer readable media, such as, for example, CD-ROMs, flash drives, and the like. Further, those skilled in the art will appreciate that the functions of the various computing devices may be combined with one another, integrated into one computing device, or the functionality of a particular computing device may be implemented within one or more other computing devices Lt; / RTI > can be dispersed in the < / RTI >

3 is a block diagram showing an electrical configuration of an oven 100 capable of uniform heating according to various embodiments of the present invention.

3, an oven 100 capable of uniform heating according to an embodiment of the present invention includes a power supply unit 110, a control unit 120, a signal generation unit 121, Phase shifters 130A and 130B, first and second power amplifying units 140A and 140B and first and second antennas 150A and 150B. Here, although two antennas 150A and 150B are described, the number of antennas is not limited in the embodiment of the present invention. For example, two to 100 antennas can be installed, so that the number of the phase shifters and the number of the power amplifying parts to be installed can be increased more than that shown in the figure. The signal attenuators 123A and 123B and the drivers 125A and 125B may be connected in series between the signal generating unit 121 and the first and second phase shifters 130A and 130B, The signal attenuators 126A and 126B may be further connected between the two phase shifters 130A and 130B and the first and second power amplifying units 140A and 140B. In addition, although one signal generator 121 is shown in the drawing, a signal generator may be provided for each antenna so that the antennas radiate different frequencies.

The power supply unit 110 serves to supply DC power to the controller 120 and the first and second power amplifier units 140A and 140B. The power supply unit 110 may be, for example, but not limited to, a Switching Mode Power Supply (SMPS). Also, the power supply unit 110 can obtain a desired DC voltage / current by using a normal commercial AC voltage (for example, AC 110 to 220 V) or using a normal DC battery pack. Accordingly, the oven 100 capable of uniform heating according to the embodiment of the present invention can be easily installed and used not only in a general home, but also in a refrigerator having an outdoor, a vehicle, a ship, or a freezer.

The control unit 120 (or the MCU) receives power from the power supply unit 110 and outputs a frequency control signal, a phase control signal and / or an amplification (power) control signal to the signal generating unit 121, 130A, and 130B and the first and second power amplifying units 140A and 140B, respectively. That is, the control unit 120 outputs the frequency control signal to the signal generating unit 121 so that the signal generating unit 121 generates a signal having a frequency of 1 MHz to 100 GHz, for example, but not limited to, 10 MHz to 10 GHz Thereby generating an electromagnetic wave having a frequency. In particular, the controller 120 allows the signal generator 121 to freely generate electromagnetic waves of various frequency bands through the frequency control signal. In some cases, the signal generating units 121 are also connected to the attenuators 123A and 123B, respectively, so that electromagnetic waves having different frequencies can be input to the drivers 125A and 125B, respectively.

The controller 120 may output different or identical phase control signals to the first and second phase shifters 130A and 130B so that the first and second phase shifters 130A and 130B may limit But outputs electromagnetic waves in a frequency band having a phase value or a phase difference of 0 to 180 degrees. The controller 120 outputs different or identical amplification control signals to the first and second power amplifiers 140A and 140B so that the first and second power amplifiers 140 But it is also possible to output an electromagnetic wave having a power value or a power difference of 0 to 3,000 watts.

The signal generator 121 receives the frequency control signal of the controller 120 and outputs an electromagnetic wave signal having a predetermined frequency band. The signal generating unit 121 generates an electromagnetic wave signal using a predetermined algorithm or software using a PLL IC that is a semiconductor rather than an oscillation circuit. Accordingly, the signal generating unit 121 can generate a sophisticated electromagnetic wave signal in a digital manner rather than an analog manner. Here, the signal generating unit 121 may generate electromagnetic waves having a frequency of 1 MHz to 100 GHz, preferably, 10 MHz to 10 GHz, for example, but not limited thereto.

The first and second phase shifters 130A and 130B respectively receive the electromagnetic wave signal from the signal generator 121 and the phase control signal from the controller 120 to limit the phase value or phase difference, However, it is possible to output the electromagnetic wave signals of 0 DEG to 180 DEG to the first and second power amplifying units 140A and 140B, respectively.

The first and second power amplifying units 140A and 140B may receive electromagnetic wave signals from the first and second phase shifters 130A and 130B, Amplification (power) control signal, and amplifies and outputs the electromagnetic wave at a predetermined magnification. The first and second power amplifying units 140A and 140B can output, for example, electromagnetic power having various power values or power differences of 0 to 3,000 watts as a solid state power amplifier.

More specifically, the first and second power amplifying units 140A and 140B are electrically connected to the first and second phase shifters 130A and 130B and are connected to an MMIC (Monolithic Microwave Integrated Circuit) 141A, 142B which are electrically connected to the MMICs 141A, 141B to perform the amplification operation and the terminal transistors 142A, 142B which are electrically connected to the driving transistors 142A, 142B, respectively, (143A, 143B). The first and second power amplifying units 140A and 140B may further include first and second isolators 144A and 144B formed between the first and second power amplifying units 140A and 140B and the first and second coaxial cables 145A and 145B. The first and second isolators 144A and 144B are interposed between the first and second power amplifying units 140A and 140B and the first and second coaxial cables 145A and 145B to improve impedance matching, In particular, the first and second power amplifying units 140A and 140B prevent signals from flowing into the first and second antennas 150A and 150B, respectively.

A protection circuit (not shown) is further connected between the first and second isolators 144A and 144B and the control unit 120 so that the control unit 120 can be input through the first and second isolators 144A and 144B Do not be damaged by transient voltage.

The first and second antennas 150A and 150B are connected to the first and second power amplifying units 140A and 140B through first and second coaxial cables 145A and 145B, And 140B to emit electromagnetic waves of the same phase phase, different phases, or different powers to the object to be cooked in the cooking cavity 160, thereby uniformly heating the object to be cooked , Thawed or dried.

The first and second antennas 150A and 150B may be disposed at different positions on the inner surface of the cooking cavity 160 in a flat plate shape, a monopole shape, or a dipole shape, So that the various types of cooked objects uniformly heated, defrosted and / or dried.

The first and second antennas operate in various frequency bands within the cooking cavity as described above and are miniaturized in size to minimize the space occupied in the cooking cavity. All of the antennas used when arranging two or more antennas in the oven for uniform heating in the cooking cavity can use the same or different shapes, and an example of an antenna shape used is shown in Figs. 4A and 4B have.

In this manner, in the various embodiments of the present invention, multiple hot spots are generated in the cooking cavity by using two, four, or more multiple antennas, thereby uniform heating of the cooking object is made possible. Further, in various embodiments of the present invention, it is possible to control the wavelength or beam forming of the electromagnetic wave in a time-division manner by varying and / or shifting the phase with the multiple antennas so as to uniformly heat the object to be cooked do. In addition, in various embodiments of the present invention, power (output) is varied for each antenna as needed, so that power can be optimized and current consumption can be drastically reduced. In addition, various embodiments of the present invention enable various cooking modes by selectively using various frequencies (e.g., 13.56 MHz, 27 MHz, 40 MHz, 433 MHz, 915 MHz, 2450 MHz, 3 GHz, 10 GHz, etc.).

4A and 4B are a perspective view and a side view showing an example of a multi-antenna for oven capable of uniform heating according to various embodiments of the present invention. Here, since the first and second antennas 150A and 150B have the same shape, the first antenna 150A will be mainly described. It goes without saying that various types of monopole or dipole antennas may be used in addition to the form of the first antenna 150A shown here.

4A and 4B, the antenna 150A is installed parallel and spaced apart from the inner surface (conductive surface) of the cooking cavity 160. The antenna 150A has a rectangular shape with a length L and a width W, Or a rectangular patch portion 151 in the form of a rectangular plate. The antenna 150A includes a pair of first ground strips 152 disposed adjacent to opposite sides of both sides of the rectangular patch portion 151 and the lower corners of both sides of the rectangular patch portion 151, And a grounding strip 153. The antenna 150A may further include a feeding part 154 provided in one area of the rectangular patch part 151 facing the second grounding strip 153 as a part between the first grounding strips 152. [ Here, the first and second grounding strips 152 and 153 are grounded, and the feeding part 154 is connected to the coaxial cable.

The distance between the inner surface (conductive surface) of the cooking cavity 160 and the rectangular patch portion 151 may be approximately 5 to 35 mm. If the spacing distance is smaller than 5 mm, the electromagnetic wave radiation efficiency from the rectangular patch portion 151 is lowered. If the spacing distance is larger than 35 mm, the cavity size of the cooking cavity 160 becomes smaller.

The first and second grounding strips 152 and 153 and the feeder 154 are bent in a substantially vertical direction from the rectangular patch portion 151 so that they can be easily connected to an external ground line and a coaxial cable.

In addition, the operating frequency of the antenna 150A should be designed in consideration of the frequency change in the range of about 10% depending on the kind, size, and position of the cooking object placed in the cooking cavity 160 of the oven. The area of the rectangular patch portion 151 of the antenna 150A with respect to the total area of the inner surface is set to be approximately 10 to 30%. If the area of the rectangular patch portion 151 is less than about 10%, the electromagnetic wave radiation efficiency is lowered. If the area is larger than about 30%, the cavity size of the cooking cavity 160 is reduced.

The rectangular antenna 150A is spaced apart from the inner surface of the cavity of the cavity and is fed by a coaxial cable. The feeder 154 and the first and second grounding strips 152 and 153 A characteristic change occurs depending on the position.

The size (L, W) of the antenna 150A, the feeding position, the width (GW) of the grounding strip, the mounting position in the cavity, and the like can be optimally determined through simulation.

5A and 5B are diagrams showing an arrangement of multiple antennas for ovens capable of heating uniformly according to various embodiments of the present invention.

As shown in Figs. 5A and 5B, the inner surface of the cooking cavity 160 may be in the form of a hollow hexahedron. That is, the inner surface can be composed of six surfaces. More specifically, the inner surface of the cooking cavity 160 includes a door surface 161 for opening and closing the cooking cavity 160 for inserting or removing the object to be cooked inside the cooking cavity 160, and a rear surface 161 facing the door surface 161 Left and right side surfaces 163 and 164 provided on the left and right sides between the door surface 161 and the rear surface 162 and upper and lower surfaces 165 and 166 provided on upper and lower sides between the door surface 161 and the rear surface 162, . ≪ / RTI > Of course, such an inner surface of the hexahedral shape can be formed of an electrically conductive material so as to prevent external radiation of electromagnetic waves.

Here, the first and second flat antennas 150A and 150B according to the embodiment of the present invention may be formed of any one of the rear surface 162, the left and right surfaces 163 and 164, and the upper and lower surfaces 165 and 166 of the inner surface of the cooking cavity 160 Or they may be installed on different surfaces and spaced apart from each other. 5A and 5B, the first and second antennas 150A and 150B are spaced apart from each other by a predetermined distance on the upper surface 165 of the inner surface of the cooking cavity 160. As shown in FIG.

Here, when simulating the characteristics of the antenna and the distribution of the electromagnetic wave in the oven, the side with the door of the oven was simulated assuming that the side having the conductive medium exists.

6A and 6B are graphs illustrating the concept of phase control of an oven multi-antenna capable of uniform heating according to various embodiments of the present invention. 6A, the X-axis is the control phase angle and the Y-axis is the amplitude. In addition, it is assumed that the antenna is located at the upper part in FIG. 6B and the cooking object is located at the lower part.

The frequency signal through the signal generating unit 121 is input to the first and second phase shifters 130A and 130B. The phase angle can be variously shifted according to the phase control signal of the controller 120. [ For example, the frequency signal input to the first phase shifter 130A may be shifted by 60 °, and the frequency signal input to the second phase shifter 130B may be shifted by 90 °. According to this principle, a frequency signal having various phase values or phase differences can be output by the first and second phase shifters 130A and 130B. That is, the first and second antennas 150A and 150B may output electromagnetic waves having the same phase-controlled values, or may output electromagnetic waves having mutual phase differences.

For example, as shown in FIG. 6A, in one dimension, one frequency signal transmits energy to a cooking object in S1, and another frequency signal transmits energy to a cooking object in S2. This is expressed in three dimensions. As shown in FIG. 6B, the electromagnetic wave radiated from the antenna transmits energy while rotating helically toward the object to be cooked. That is, since the position of the electromagnetic wave that is in contact with the object to be cooked continuously changes in a circular shape due to the phase change or shift, the heating / defrosting position is constantly changed in the 360 ° direction. Of course, according to the embodiment of the present invention, there is an advantage that a member for rotating the cooking object or a member for rotating the antenna is not needed.

7 is a graph showing reflection coefficient characteristics of an oven multi-antenna capable of uniform heating according to various embodiments of the present invention. 7, the X-axis is the frequency and the Y-axis is the reflection coefficient.

As shown in FIG. 7, the power applied to the first and second antennas 150A and 150B is fixed to 50W, for example, and the power of the first antenna 150A and the second antenna 150B is approximately 433MHz The reflection coefficient in the band is -10 dB or less, which indicates that the impedance matching is good.

FIGS. 8A and 8B are diagrams illustrating simulation results of phase variation of an oven multiple antenna capable of uniform heating according to various embodiments of the present invention. FIG.

The length (L) and the width (W) of the antenna shown in Figs. 5A and 5B are adjusted so that the resonance frequency is set, The impedance GW of the ground stub and the position of the feeding part can be adjusted to optimize the impedance matching of the antenna.

에 비례하는 것으로 시뮬레이션될 수 있으며, 이를 통해 조리 대상에 유기되는 최대 전계의 세기가 측정되어 균일한 가열의 정도가 확인될 수 있다.Since the cooking object to be cooked in the oven is basically a loss medium, the power loss of the electromagnetic wave is the square of the electric field intensity,

The intensity of the maximum electric field induced in the object to be cooked can be measured and the degree of uniform heating can be confirmed.

As shown in FIG. 8A, in the first and second antennas 150A and 150B, the supplied power is the same and the supplied phase values are controlled (for example, 90 °), it can be seen that uniform heating, defrosting, and drying can occur in the cooking cavity. However, as shown in FIG. 8B, the power supplied to the two first and second antennas 150A and 150B is the same, and the supplied phase is not controlled (for example, °, and the phase of the second antenna is not controlled), it can be seen that heating, thawing and drying do not occur uniformly in the cooking cavity.

FIGS. 9A and 9B are block diagrams and multi-antenna array structures illustrating an electrical configuration of an oven capable of uniform heating according to various embodiments of the present invention.

9A and 9B, the multiple antennas may include first, second, third, and fourth antennas 150A, 150B, 150C, and 150D, which are disposed on the top surface 165 of the cooking chamber 160 They can be arranged at a certain distance from each other. Here, since the number of antennas is four, the number of the phase shifters and the power amplifier connected to the antennas may also be four. This electrical configuration is substantially the same as that described above with reference to FIG. 3, so a detailed description thereof will be omitted.

10A and 10B are views showing an arrangement structure of an oven multi-antenna capable of uniform heating according to various embodiments of the present invention. Here, the arrangement structure of the multiple antennas is only an example for understanding the present invention, and various modifications thereof are possible.

10A, the first antenna 150A is installed on the left side of the upper surface 165 of the inner surface of the cooking chamber 160 and the second antenna 150B is installed on the right side of the inner surface of the cooking cavity 160 (Not shown). That is, the first antenna 150A and the second antenna 150B may be vertically spaced apart from each other.

Also, as shown in FIG. 10B, embodiments of the present invention may include first, second, and third antennas 150A, 150B, and 150C. The first antenna 150A and the second antenna 150B are installed on the top surface 165 and the right surface 164 of the oven respectively and the third antenna 150A is installed on the rear surface 162 of the oven, The electromagnetic wave can be provided both in the horizontal axis and in the vertical axis direction. Of course, the power, phase, and / or frequency applied to the first, second, and third antennas 150A, 150B, and 150C may be varied so that the interior of the cooking cavity 160 may be uniformly heated, defrosted, and / .

Thus, various embodiments of the present invention vary the phase of the frequency, and use a plurality of antennas (not antennas, not antennas) to cause the plurality of antennas to form a plurality of hot spots in the cooking cavity, So that the sum of the vectors is finally produced so that the cooking object in the cooking cavity can be uniformly heated, defrosted, and / or dried. In other words, in various embodiments of the present invention, the conventional waveguide is removed and instead, a flat plate, a monopole or a dipole type antenna is installed in multiple, such as two or four, and a phase shift technique So that it is possible to generate a uniform electric field in the cooking cavity by only an antenna and an algorithm (phase control) without mounting a motor. In particular, the various embodiments of the present invention allow the electromagnetic waves to be efficiently radiated to various portions of the multi-antenna through the phase shift, and the phase thereof is controlled by controlling the phase thereof to control the electric field in the cooking cavity, And / or drying uniformity.

11 is a perspective view showing an example of an oven capable of uniform heating installed in a refrigerator according to various embodiments of the present invention.

As shown in FIG. 11, the oven 100 capable of uniform heating according to the embodiment of the present invention can be installed in the refrigerator 200. The refrigerator 200 may include, for example and without limitation, a freezer compartment door 210 that closes the freezer compartment, a refrigerator compartment and a refrigerator compartment door 220 blocking the same, The possible oven 100 may be installed in the freezer compartment door 210. Of course, it should be understood that the oven 100 capable of uniform heating according to an embodiment of the present invention may be installed inside the refrigerator compartment door 220, inside the freezer compartment, and / or inside the refrigerator compartment. Furthermore, since the oven 100 capable of uniform heating according to the embodiment of the present invention does not have a magnetron, a wave guide, and the like, it is natural that it can be formed and installed much smaller or thinner than that shown in the drawings. In the drawing, reference numeral 230 denotes a home bar.

As described above, in the embodiment of the present invention, the oven 100 capable of uniform heating can be embedded in the refrigerator 200, so that the convenience and quality of the refrigerator can be further improved and further improved, The refrigerator market will be opened.

The present invention is not limited to the above-described embodiments, and various modifications may be made without departing from the scope of the present invention as set forth in the appended claims. It will be understood by those of ordinary skill in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined in the appended claims.

100; Oven with uniform heating
110; Power supply 120; The control unit
121; Signal generators 130A and 103B; The first and second phase shifters
140A, 140B; First and second power amplifying units 150A and 150B; First and second antennas
151; A rectangular patch portion 152; The first grounding strip
153; A second grounding strip 154; Feeding part
160; A cooking cavity 161; Door face
162; Rear 163, 164; Left, Right
165,166; Upper, lower

Claims (13)

A first antenna provided on an inner surface of the cooking cavity; And
And a second antenna disposed on the inner surface of the cooking cavity so as to be spaced apart from the first antenna,
Wherein the first and second antennas are disposed in parallel to each other, spaced apart from the inner surface of the cooking cavity, and each have a rectangular plate shape having a length and a width; A pair of first ground strips in the form of a rectangular plate, each of which is provided at both opposite sides of the rectangular patch portion and at both lower edges thereof; A second grounding strip in the form of a square plate having a width, which is provided at the lower center of the rectangular patch portion; And a cylindrical feed part having a diameter provided in an area of the square patch part facing the second ground strip between the pair of first ground strips, wherein a width of the first and second ground strips And the diameter of the feeding part is larger than the diameter of the feeding part. The method according to claim 1,
Wherein the phases applied to the first and second antennas are different from each other. The method according to claim 1,
Wherein the power applied to the first and second antennas are different from each other. The method according to claim 1,
Wherein the frequencies applied to the first and second antennas are different from each other. delete The method according to claim 1,
The inner surface of the cooking cavity
Door surface;
A rear surface opposed to the door surface;
A seating surface and a right surface provided respectively on the left and right sides between the door surface and the rear surface; And
And an upper surface and a lower surface provided on upper and lower sides between the door surface and the rear surface, respectively. The method according to claim 6,
The first and second antennas may be installed on the upper surface,
Wherein the first antenna is installed on the upper surface, and the second antenna is installed on the seating surface or the right surface. 8. The method of claim 7,
Further comprising third and fourth antennas,
The third and fourth antennas may be installed on the upper surface,
Wherein the third antenna is installed on the rear surface, and the fourth antenna is installed on the opposite surface of the second antenna. The method according to claim 1,
Wherein the phase difference between the first and second antennas is 0 to 180 degrees. The method according to claim 1,
Wherein the power difference between the first and second antennas is 0 watts to 3000 watts. The method according to claim 1,
Wherein the first and second antennas output electromagnetic waves each having a frequency of 10 MHz to 10 GHz. A power supply unit for supplying DC power;
A control unit receiving power from the power supply unit and outputting a frequency control signal and an amplification control signal, respectively;
A signal generator for receiving the frequency control signal of the controller and outputting an electromagnetic wave signal;
An amplifying control signal from the signal generator and an amplification control signal from the controller to amplify the electromagnetic wave and output the amplified electromagnetic wave to the first antenna according to any one of claims 1 to 4 and 6 to 11 A first power amplifier unit for receiving the first power amplifier unit; And
An amplification control signal from the signal generator and an amplification control signal from the controller, amplifies the electromagnetic wave, and outputs the amplified electromagnetic wave to the second antenna according to any one of claims 1 to 4 and 6 to 11 And a second power amplifying unit that is connected to the first power amplifying unit. 13. The method of claim 12,
A first phase shifter that is phase-shifted by the control unit is connected between the signal generating unit and the first power amplifying unit,
And a second phase shifter which is phase-shifted by the control unit is connected between the signal generating unit and the second power amplifying unit.

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