WO2019045471A1 - Four à micro-ondes et module de rayonnement pour celui-ci - Google Patents

Four à micro-ondes et module de rayonnement pour celui-ci Download PDF

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Publication number
WO2019045471A1
WO2019045471A1 PCT/KR2018/010034 KR2018010034W WO2019045471A1 WO 2019045471 A1 WO2019045471 A1 WO 2019045471A1 KR 2018010034 W KR2018010034 W KR 2018010034W WO 2019045471 A1 WO2019045471 A1 WO 2019045471A1
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waveguide
microwave
linear
slot antennas
antenna
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PCT/KR2018/010034
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English (en)
Korean (ko)
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박수용
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유한회사 에스피앤파트너스
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Publication of WO2019045471A1 publication Critical patent/WO2019045471A1/fr

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/70—Feed lines
    • H05B6/707—Feed lines using waveguides
    • H05B6/708—Feed lines using waveguides in particular slotted waveguides
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/64—Heating using microwaves
    • H05B6/72—Radiators or antennas

Definitions

  • the present invention relates to a microwave oven, and more particularly, to a microwave oven that uniformly radiates microwave at the upper portion of a cooking chamber for cooking food and a radiation module thereof.
  • the microwave oven has a configuration that radiates microwaves into the cooking chamber to cook food.
  • a general microwave oven has a magnetron for generating a microwave in an electric room on the side of a cooking chamber, and is configured to radiate a microwave through a side wall of the cooking chamber to a cooking chamber.
  • the microwave oven that radiates the microwave through the side wall of the cooking chamber to the cooking chamber is defined as a side emitting microwave oven.
  • the side-emitting microwave oven requires components for rotating the food, and components such as a turntable, rollers, and a motor are configured in the cooking chamber and the lower space for this purpose.
  • the side radiating microwave oven has a disadvantage that it is difficult to reduce the volume due to the configuration of the space for the auxiliary components.
  • the turntable occupies a part of the internal space of the cooking chamber. Therefore, the side radiating microwave oven has a disadvantage that the space of the cooking chamber is narrow.
  • the side-emitting microwave oven uses a microwave emitted from a limited area of one side wall of the cooking chamber to heat the food. Therefore, it is difficult for the side-emitting microwave oven to uniformly heat the food even if the food is rotated.
  • the side radiating microwave oven is configured to cook food while rotating the turntable for the above reason.
  • the cooking chamber is usually configured to have a rectangular space.
  • the turntable is made into a circular shape that can rotate in a space of a rectangular body. Therefore, of the internal space of the cooking chamber, only a part of the space in which the turntable is rotatable is utilized for cooking, and the remaining space is wasted.
  • the present invention provides a microwave oven capable of radiating microwaves downward from first and second linear waveguides on an upper portion of a cooking chamber, and a microwave oven capable of cooking food by microwaves radiated from the spinning module.
  • Another object of the present invention is to provide a microwave oven and a radiation module thereof that can uniformly heat food by radiating a microwave from a pair of slot antennas of first and second linear waveguides to a lower cooking chamber.
  • the present invention provides a microwave oven capable of eliminating reflected waves generated by slotted antennas, etc., in which the height of the waveguide, the deflection of the traveling direction of the microwave, and the slot antennas in the course of advancing or bending the microwave, It is another object to provide a radiation module thereof.
  • a microwave radiation module of a microwave oven includes first and second linear waveguides for advancing microwaves radiated through an antenna of a magnetron in parallel in a first linear direction in parallel at different positions on an upper surface of a cooking chamber
  • a waveguide is formed;
  • a plurality of pairs of slot antennas are formed at a position deviated from the center line of the first and second straight waveguides and further away from the center line as the traveling distance of the microwave is farther away, Are disposed at positions spaced apart from each other by a half of the wavelength of the microwave in the waveguide in the first linear direction on the bottom surface of the waveguide;
  • each of the pair of slot antennas includes first and second slot antennas passing through the bottom surface at positions spaced apart from each other by a quarter of the wavelength of the microwave in the waveguide with respect to the first linear direction .
  • a microwave oven of the present invention includes: a cooking chamber; A magnetron radiating a microwave through an antenna; And first and second linear waveguides formed horizontally in a first linear direction spaced apart from each other at an upper portion of the cooking chamber and each having a plurality of pairs of slot antennas formed on the bottom surface thereof, And a radiation module formed with a waveguide radiating to the lower cooking cavity through the plurality of pair of slot antennas while advancing to the first and second linear waveguides, Wherein the first and second linear waveguides are formed at positions deviated from the center line of the waveguide and further away from the center line as the traveling distance of the microwave is farther, Arranged at positions spaced apart from each other by a half of the wavelength of the microwave; And each of the pair of slot antennas includes first and second slot antennas passing through the bottom surface at positions spaced apart from each other by a quarter of the wavelength of the microwave in the waveguide with respect to the first linear direction .
  • the present invention has an effect of radiating microwaves from the upper part of the cooking chamber to cook food inside the cooking chamber.
  • components such as a turntable, a motor and a roller, which are required for rotating the food, can be saved, and a space for storing or constructing the components can be saved Can be saved.
  • the turntable is not formed inside the cooking chamber, the space utilization of the cooking chamber can be improved, and the food can be cooked by putting containers of various sizes and shapes into the cooking chamber.
  • the present invention has the effect that the microwave can uniformly heat the food by radiating the microwave into the inside of the cooking chamber while being straight in parallel at two positions spaced from each other at the upper part of the cooking chamber.
  • the present invention has an advantage in that microwaves are not influenced by reflected waves by canceling reflected waves that may occur in the process of straightening or bending the microwaves.
  • the present invention can radiate spatially uniform microwaves by radiating microwaves into the cooking chamber using a plurality of double-slot antennas, and obtain a heating effect that is temporally uniform due to the phase difference of the microwaves radiated from the two slot antennas .
  • the present invention since the electric force lines in the cooking chamber are formed in a certain direction, the present invention has an advantage that the food can be heated using the grill.
  • FIG. 1 is a perspective view illustrating an embodiment of a microwave oven of the present invention.
  • FIG. 2 is a perspective view illustrating a configuration of a spinning module and a magnetron applied to the embodiment of FIG. 1;
  • Figure 3 is a plan view of the radiation module of Figure 2;
  • Figure 4 is a plan view of the base of the radiation module with the top cover removed in Figure 2;
  • FIG. 5 illustrates a waveguide formed by a cover
  • FIG. 6 is a sectional view taken along the line A-A in Fig.
  • Fig. 7 is a cross-sectional view along the line B-B in Fig. 4
  • FIG. 8 is a plan view illustrating a dual slot antenna
  • FIG. 10 is a diagram illustrating an electric force line of an electric field by a microwave
  • FIG. 11 illustrates a waveguide in which a bend is modified
  • FIG. 12 is a diagram illustrating a grill having a cooking chamber.
  • FIG. 13 illustrates another embodiment of a waveguide of the present invention.
  • Figure 14 illustrates another embodiment of a waveguide of the present invention.
  • the present invention discloses a structure in which a microwave is advanced to two linear waveguides on the top of a cooking chamber and then radiated to the bottom.
  • Two linear waveguides are arranged parallel to the upper part of the upper surface of the cooking chamber and extend in the same first linear direction, And the like.
  • the microwave radiated from the pair slot antenna of each linear waveguide may be configured to have an inverted phase.
  • the twin slot antennas are spaced apart from each other by a half of the wavelength of the microwave in the waveguide in the longitudinal direction.
  • twin slot antenna of the present invention has a different structure from a general array antenna.
  • the twin slot antenna of the present invention includes two slot antennas.
  • the two slot antennas are arranged in the same direction with respect to the center line of the width of the waveguide and are spaced apart by a quarter of the wavelength of the microwave in the waveguide in the first linear direction in which the microwaves travel.
  • the slot antennas By the arrangement of the slot antennas, reflected waves of microwaves generated in the respective slot antennas can be effectively removed. In addition, temporal homogenization of the microwave radiated into the cooking cavity can be achieved. By using a plurality of double-slot antennas, spatial homogenization of the microwave in the cooking chamber can be achieved.
  • the microwave oven may include a door 5 hinged to one side of the front side by a rotation, and a control panel 7 having operation buttons and a display capable of displaying an operating state.
  • the microwave oven has a cooking chamber (10) which can be opened and closed by a door (5).
  • the cooking chamber (10) has an internal space of rectangular shape for cooking the stored food.
  • the interior of the microwave oven can be divided into a cooking chamber 10 and an electric field chamber (not shown), and the electric field chamber can be formed in one side space of the cooking chamber 10, that is, in the space behind the control panel 7.
  • the electric field chamber is a space covered by a case (not shown) as in the case of the cooking chamber 10 and includes a magnetron 20, a part of a radiation module 30 described later, a printed circuit board of the control panel 7, Is used for mounting a part of the semiconductor device.
  • the magnetron 20 generates a microwave of a predetermined frequency and radiates through the antenna.
  • the embodiment of the microwave oven of the present invention includes a radiating module 30 configured as shown in Fig. 2 to be described later on the upper surface of the cooking chamber 10.
  • the radiation module 30 is covered by the case so as not to be exposed to the outside.
  • the radiation module 30 has a structure in which microwaves of the magnetron 20 disposed in the electric room are introduced into the upper portion of the cooking chamber 10 and the microwave is radiated to the lower cooking chamber 10.
  • the embodiment of the microwave oven of the present invention can heat and cook foods with the microwave uniformly radiated from the top surface of the cooking chamber 10 by the radiation module 30.
  • the microwave since the microwave is radiated from the upper part of the cooking chamber, the food can be heated and cooked without being rotated.
  • the embodiment of the microwave oven of the present invention does not require the configuration of the turntable, motor, and rollers used in the side-emitting microwave oven.
  • the microwave oven according to the embodiment does not need to have a space for storing or constructing a separate component such as a motor and rollers under the cooking chamber, thereby reducing the total volume of the microwave oven.
  • the microwave oven according to the embodiment since the turntable is not formed inside the cooking chamber 10, the space utilization of the cooking chamber 10 can be maximized.
  • the food can be uniformly heated by the microwave radiated from the front surface of the upper part without rotating, and the food can be cooked by putting containers of various sizes and shapes into the cooking chamber.
  • FIG. 2 is a perspective view illustrating a state where the magnetron 20 of the microwave oven and the radiation module 30 are coupled to each other
  • FIG. 3 is a plan view of the radiation module 30
  • FIG. 4 is a plan view illustrating the base 32 of the radiation module 30 with the cover 34 removed.
  • the planar structure of the waveguide can be understood with reference to FIG.
  • the waveguide is formed by a radiation module (30).
  • the waveguide includes straight waveguides TL1 and TL2 on the upper portion of the cooking chamber 10 and a distributed waveguide MG extending to the outside of the cooking chamber 10, that is, the electric field chamber.
  • the linear waveguides TL1 and TL2 are horizontally arranged in the first linear direction while being spaced apart from each other at the upper portion of the cooking chamber 10 and have a plurality of pairs of slot antennas S10, S20, S30, S11, S21, S31) are formed. More specifically, the linear waveguides TL1 and TL2 are formed horizontally spaced from each other and adjacent to a pair of opposite sides of the upper surface of the cooking chamber 10. [ The pair of slot antennas S10, S20, S30, S11, S21, and S31 will be described later.
  • the linear waveguides TL1 and TL2 radiate microwaves to the lower cooking chamber 10 through a plurality of pairs of slot antennas while advancing the microwaves.
  • the linear waveguides TL1 and TL2 are constructed in the same manner and are configured to radiate microwaves into the cooking chamber 10 by forming a plurality of pairs of slot antennas in the same configuration.
  • the distributed waveguide MG may include an introducing waveguide SL0, bends BD1 and BD2.
  • the radiation module 30 includes a base and a cover for forming the above waveguide.
  • the waveguide can be understood as a tube formed by the combination of the cover 34 and the base 32.
  • the area indicated by the dotted line in Fig. 4 can be understood as the area where the cover 34 is coupled on the base 32, that is, the waveguide area.
  • the height, width and center line of the waveguide can be understood as the height, width and center line of the channel space of the cover 34.
  • the base 32 includes a first plate 36 and a second plate 38 and the first plate 36 and the second plate 38 extend horizontally and are integrally formed.
  • the first plate 36 can be used to form the upper surface of the cooking chamber by covering the upper surface of the cooking chamber.
  • a plurality of pairs of slot antennas are formed corresponding to positions where the linear waveguides TL1 and TL2 of the first plate 36 are formed. More specifically, the first plate 36 corresponding to the range in which the linear waveguide TL1 is formed is formed with the pair of slot antennas S10, S20, and S30 along the first linear direction, and the linear waveguide TL2 is formed Slot antennas S11, S21 and S31 are formed on the first plate 36 corresponding to the range in which the antenna is formed.
  • the twin-slot antennas S10, S20, and S30 are spaced apart from each other by 1/2 (1/2?
  • the pair of slots is preferably composed of antennas (S11, S21, S31) also have a 1/2 (1 / 2 ⁇ g) are spaced apart from each other by an interval of the microwave wavelength in the waveguide in the longitudinal direction of the waveguide path (TL2).
  • a cover 34 having a channel formed thereon is coupled to the base 32 of the radiation module 30 and a waveguide having a closed channel is formed by the combination of the base 32 and the cover 34.
  • a cover 34 is formed with a channel for a straight waveguide TL1, a straight waveguide TL2 and a dispersion waveguide MG.
  • the dispersion waveguide MG distributes the microwaves of the introduction waveguide SL0 and the introduction waveguide SL0 that introduce the microwaves radiated through the antenna 22 of the magnetron 20 into the linear waveguides TL1 and TL2, And BDs BD1 and BD2, respectively.
  • the introduced waveguide SL0 has a first section SL00 having a first height for receiving the antenna 22 of the magnetron 20, a second section SL00 having a second height lower than the first height, And transition periods SL11 and SL21 connecting the second sections SL12 and SL22 to the second and third directions of the first sections SL00 and SL22 opposite to each other, do.
  • the structure of the above-mentioned introduced waveguide SL0 can be understood with reference to Fig.
  • the difference in height between the first section SL00 and the second sections SL12 and SL22 corresponds to a downward shape of the area corresponding to the first section SL00 of the base 32 or a downlength of the first section SL00 of the cover 34.
  • the transition sections SL11 and SL21 are formed to have inclined surfaces according to the height difference.
  • the first section SL00 and the second sections SL12 and SL22 are separated by a distance corresponding to 1/4 (1/4? G ) of the wavelength of the microwave in the waveguide.
  • a reflection wave caused by a microwave advances to the transition section SL11 and the second section SL12 in the first section SL00 or to the transition section SL21 and the second section SL22 in the first section SL00, Can be solved by offsetting.
  • the microwave is reflected at the first boundary line SL00 of the first section SL00 and the first boundary line of the transition section SL11 and at the second boundary line of the transition section SL110 and the second section SL12 while proceeding in the second direction.
  • the distance between the first and second boundary lines corresponds to 1/4 (1/4? G ) of the wavelength of the microwave in the waveguide. Therefore, when the reflected wave generated at the second boundary line reaches the first boundary line, Reflected waves generated at the boundary can be canceled out because they have inverted phases.
  • the bend BD1 connects the second section SL12 positioned in the second direction of the introduced waveguide SL00 to the linear waveguide TL1.
  • the linear waveguide TL1 may be connected to the bend BD1 by being formed such that one end thereof extends in a direction opposite to the first linear direction by a predetermined section SL1.
  • the bend BD2 connects the second section SL22 located in the third direction of the introduced waveguide SL00 and the linear waveguide TL2.
  • the linear waveguide TL2 may be connected to the bend BD2 by being formed so as to extend by a certain section SL2 in the direction opposite to the first linear direction.
  • the bends BD1 and BD2 are arranged between the boundary lines BL1 and BL3 in contact with the introduced waveguide SL0 and the boundary lines BL2 and BL4 in contact with the sections SL1 and SL2 extending in the linear waveguides TL1 and TL2 And may be formed as an inclined linear waveguide.
  • the microwaves entering the bends BD1 and BD2 are firstly bent 45 degrees toward the first linear direction where the linear waveguides TL1 and TL2 are located at the boundary lines BL1 and BL3 and the boundary line BL2 , And BL4, which are shifted by 45 degrees in the second direction toward the first linear direction.
  • the bends BD1 and BD2 are arranged such that the intersection points of the center line of the width of the waveguide and the boundary lines BL1, BL2, and BL3 and BL4 correspond to 1/4 (1 / 4 ⁇ g ) .
  • the reflected waves generated at the two side boundaries of the bends BD1 and BD2 can be canceled because they have an inverted phase due to the separation distance.
  • the bends BD1 and BD2 are connected to the boundary lines BL1 and BL3 that are in contact with the lead waveguide SL0 and the boundaries SL1 and SL2 that extend in the straight waveguides TL1 and TL2, Type waveguide between the waveguides BL2 and BL4.
  • each of the linear waveguides TL1 and TL2 has a plurality of pairs of slot antennas formed on the bottom surface thereof.
  • the number of pairs of slot antennas formed in each of the linear waveguides TL1 and TL2 may be determined differently, such as two, three, or four, corresponding to the area of the cooking chamber.
  • the output of the microwave decreases as it propagates along the waveguide. Unless the reduction in output of the microwave is compensated for, the microwave is not uniformly radiated from the plurality of twin-slot antennas.
  • the linear waveguides TL1 and TL2 of the present invention have inclined surfaces whose height gradually decreases from a predetermined position to an end in the first linear direction. The lower the height of the waveguide, the higher the conductance. That is, the rectilinear waveguides TL1 and TL2 compensate for the decrease in output as the microwave propagates with increasingly higher conductance as the height changes. As a result, the microwave can be uniformly radiated from a plurality of pairs of slot antennas formed in the linear waveguides TL1 and TL2.
  • each of the plurality of pairs of slot antennas S10, S20, S30, S11, S21, and S31 of the linear waveguides TL1 and TL2 has a quarter of the wavelength of the microwave in the waveguide g) includes first and second slot antennas (SA11, SA12, SA21, SA22 , SA31, SA32, SA13, SA14, SA23, SA24, SA33, SA34) that penetrate the bottom surface at a position spaced apart from each other at intervals.
  • first and second slot antennas SA11, SA12, SA21, SA22 , SA31, SA32, SA13, SA14, SA23, SA24, SA33, SA34
  • the slot antennas SA11, SA12, SA21, SA22, SA31 and SA32 of the linear waveguide TL1 and the slot antennas SA13, SA14, SA23, SA24, SA33 and SA34 of the linear waveguide TL2 are opposed to each other And discharges the microwave to the cooking chamber.
  • the pair of slot antennas S10, S20 and S30 on the bottom surface of the linear waveguide TL1 are alternately arranged on the left and right sides of the center line CL of the width of the waveguide along the first linear direction, The distance from the center line CL is further away from the center line CL.
  • the first and second slot antennas of each pair slot antenna are configured as shown in FIG. In FIG. 8, the pair slot antenna is denoted by "SA” and the first and second slot antennas denoted by “S1" and “S2".
  • the first and second slot antennas S1 and S2 include long holes LA1 and LA2 parallel to the first straight line direction of the microwave and through holes penetrating the bottom surface.
  • each of the first and second slot antennas S1 and S2 includes a pair of square through-holes and a plurality of through-holes for forming through-holes, and the through-holes connect the square through-holes at both ends.
  • the connection through-hole has a narrower width (GA) than the square through-hole.
  • the resonant capacitance of the first and second slot antennas S1 and S2 can be adjusted by the width GA of the connection through hole. When the width GA is narrowed, the resonant capacitance becomes large and the resonant capacitance becomes small.
  • the first and second slot antennas S1 and S2 of FIG. 8 are illustrated such that each of the square through holes has a dumbbell shape symmetrically formed about the major axes LA1 and LA2 of the through-hole.
  • the first and second slot antennas S1 and S2 may be configured to increase the resonant frequency and to fill the through hole with a dielectric to shield between the cooking chamber 10 and the waveguide.
  • first slot antenna S1 and the second slot antenna S2 are formed on the same side with respect to the center line CL of the waveguide.
  • the first slot antenna (S1) and a second slot antenna (S2) is in a first linear direction is the traveling direction of the microwave is spaced 1/4 (1 / 4 ⁇ g) interval of the microwave wavelength in the waveguide. More specifically, the center CP1 of the major axis LA1 of the first slot antenna S1 and the center CP2 of the major axis LA2 of the second slot antenna S2 are 1/4 of the wavelength of the microwave, 4? G ). Accordingly, the reflected waves generated in the first slot antenna S1 and the second slot antenna S2 can be canceled.
  • the first slot antenna S1 and the second slot antenna S2 are spaced apart from each other by a distance corresponding to 1/4 (1/4? G ), and the microwave is also transmitted to the cooking chamber 10 . Accordingly, the microwave synthesized so as to have a phase difference of 1/4 cycle can heat the food in the cooking chamber 10, so that the embodiment of the present invention can expect temporal homogenization of the heating effect.
  • first slot antenna S1 and the second slot antenna S2 are formed farther from the center line CL as they are located farther from the traveling distance of the microwave. That is, the first slot antenna S1 in which the microwave arrives first is formed closer to the center line CL of the waveguide width than the second slot antenna S2 (X1 ⁇ X2).
  • the pair of slot antennas S11, S21 and S31 on the bottom surface of the linear waveguide TL2 and the pair of slot antennas S10, S20 and S30 on the bottom surface of the linear waveguide TL1 are formed in the same pattern.
  • the pair slot antenna S10 of the linear waveguide TL1 faces the pair slot antenna S11 of the linear waveguide TL2, and the first and second slot antennas SA11 And SA12 are opposite to the first and second slot antennas SA13 and SA14 included in the pair slot antenna 11.
  • the twin-slot antenna S11 of the linear waveguide TL1 is disposed inside the space of the cooking chamber 10 with respect to the center line CL and the twin-slot antenna S11 of the linear waveguide TL2 is disposed at the center line CL. Is placed at the edge of the space of the cooking chamber (10). That is, the pair slot antenna S 10 of the linear waveguide TL 1 and the pair slot antenna S 11 of the linear waveguide TL 2 are located on the opposite side with respect to the center line CL.
  • the microwave radiated from the first and second slot antennas SA11 and SA12 of the twin slot antenna S10 and the first and second slot antennas SA13 and SA14 of the twin slot antenna S11 can be controlled by the above-
  • the microwaves emitted from the microwaves have an inverted phase.
  • the first slot antenna SA11 and the first slot antenna SA13 are coupled to the electric force lines of the electric field formed in the cooking chamber by the microwave.
  • the microwave propagating through the linear waveguides TL1 and TL2 forms electric lines of force with reference to the pair of slot antennas S10, S20, S30, S11, S21 and S31.
  • the electric power lines by the slot antennas S10, S20 and S30 of the linear waveguide TL1 and the electric power lines by the slot antennas S11, S21 and S31 of the linear waveguide TL2 are aligned in the direction orthogonal to the traveling direction of the microwave in the waveguide To form the electric force lines of the linearly polarized light. As a result, an electric force line that flows from one side wall of the cooking chamber to the other side wall is formed.
  • the electric force lines are evenly distributed throughout the interior of the cooking chamber 10, and homogenization of the microwave is realized with respect to the cooking chamber 10.
  • the slot antenna SA32 closest to the first straight line end of the linear waveguide TL1 has a distance between the center CP32 of the long axis LA32 and the end portion of the slot antenna SA32, / 4 (1/4? G ).
  • the slot antenna SA34 closest to the first linear direction end of the straight waveguide TL2 also has a distance between the center and the end of the long axis equal to 1/4 (1/4? G ) of the wavelength of the microwave in the waveguide So as to be spaced apart from each other.
  • the slot antennas SA32 and SA34 located at the end of the first straight line of the linear waveguides TL1 and TL2 are spaced apart from each other by a distance corresponding to 1/4 (1/4? G ) Accordingly, the reflected waves generated at the end of the slot antennas SA32 and SA34 can be canceled because they have an inverted phase due to the separation distance.
  • the radiation module of the microwave oven of the present invention employs a two-slot antenna.
  • the two slot antennas of the pair of slot antennas are formed on the same side of the center line CL of the waveguide and are disposed such that the long axis is parallel to the center line CL and 1/4 (1/4? G ) of the wavelength of the microwave in the waveguide. As shown in FIG. Further, since the linear waveguide is configured to have a lower height in the direction in which the microwave advances, the output of the microwave can be kept constant.
  • the output of the microwave is maintained constant, the magnitude of the reflected wave is equalized, the reflected wave can be effectively canceled, the microwave radiated into the cooking chamber is spatially uniform, have.
  • the radiation module of the microwave oven of the present invention forms two rectilinear waveguides arranged in parallel.
  • the two parallel linear waveguides have geometrically identical structure and also have the same position and structure of the slot antenna. Accordingly, the microwave radiated from each linear waveguide is synthesized by constructive interference to maximize the radiation efficiency, the microwave can be spatially uniformly radiated into the cooking chamber 10,
  • the microwave flow in the cooking chamber can be made homogeneous by temporally homogenizing the heating effect by the flow of the microwave traveling in the same direction as the microwave inside the linear waveguide due to the phase difference of the microwave.
  • the microwave oven according to the present invention can be heated and cooked with microwave that is uniformly radiated from the upper surface of the cooking chamber 10 by the radiation module 30.
  • the microwave oven of the present invention may further include a grill 100 housed inside the cooking chamber 10 to more effectively heat and cook food.
  • the grill 100 may include horizontally parallel spaced metal lines 102 and reinforcing metal lines 104 disposed horizontally in a direction orthogonal to the metal lines 102 and coupled with the metal lines 102.
  • the grill 100 has the metal wires 102 and the reinforcing metal wires 104 and the reinforcing metal wires 104.
  • the grill 100 has a flat plate coupled with the metal wires 102 and the reinforcing metal wires 104 to have a grid pattern. And a leg for separating the flat plate made up of the cooking chamber 10 from the bottom of the cooking chamber 10 by a predetermined height.
  • the metal wires 102 of the grill 100 are preferably arranged in a direction perpendicular to the electric lines of force.
  • the lines of electric force in the cooking chamber 10 are formed in a substantially parallel direction. Therefore, when the metal wires 102 are arranged in a direction perpendicular to the electric lines of force, the microwaves are transmitted through the metal wires 102 without inducing an induced current.
  • the microwave oven of the present invention can constitute the grill (100) in the cooking chamber (10).
  • the reinforcing metal wires 104 vertically coupled to the metal wires 102 are preferably spaced apart from each other by a distance corresponding to 1/2 (1/2? G ) of the wavelength of the microwave in the free space.
  • the lattice-like space formed by the metal wires 102 and the reinforcing metal wires 104 may have a function of generating a resonance like a slot antenna, so that the permeation of the grill 100 of the microwave is made efficient .
  • the food in the microwave oven's cooking chamber 10 In order for the food in the microwave oven's cooking chamber 10 to be uniformly heated, the food should be positioned at a position where an electric field capable of heating is formed. However, in the case of the bottom of the cooking chamber 10, it is difficult to form an electric field of sufficient intensity to heat the food.
  • the metal wires 102 for loading the food of the grill 100 are formed at a height spaced from the bottom surface of the cooking chamber 10 by an odd multiple of 1/4 (1/4? G ) of the wavelength of the microwave in the free space .
  • the whole food can be heated evenly by an electric field of sufficient intensity.
  • the linear waveguides TL1 and TL2 of the radiation module 30 may have through-holes EX1 and EX2, respectively, passing through the bottom surface in the first linear direction end as shown in FIG.
  • the through holes (EX1, EX2) serve to increase the efficiency with which microwaves are radiated to the cooking chamber (10), and can radiate the remaining microwaves to the lower cooking chamber (10) in the first linear direction.
  • the through-holes EX1 and EX2 are formed in a rectangular shape.
  • the present invention can be configured such that the dispersion waveguide formed in the electric field chamber by the radiation module 30 includes eh 14 and the first introduction waveguide EG and the second introduction waveguide MG as shown in Fig.
  • the first introduced waveguide EG includes an introduction section EG1 having a through hole 39 to which the antenna 22 of the magnetron 20 is coupled and having a first height for receiving the antenna 22, And a transition section EG2 connecting the section EG1 and the second introduced waveguide MG having the second height.
  • the second introduction waveguide MG may be configured to have the same height as the bends BD1 and BD2 without having a transition section as described with reference to Figs.
  • the provided microwaves are advanced in the second direction and the third direction in which the bends BD1 and BD2 are formed.
  • the second introduced waveguide MG is formed with a reflecting portion NC having reflecting surfaces facing the microwave provided in the first introduced waveguide EG and reflecting the microwave in the second direction and the third direction, respectively Is preferred.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Abstract

La présente invention concerne : un four à micro-ondes qui diffuse uniformément des micro-ondes à partir du côté supérieur d'une chambre de cuisson afin de cuire des aliments ; et un module de rayonnement pour celui-ci, le four à micro-ondes comprenant : une chambre de cuisson ; un magnétron pour diffuser des micro-ondes à travers une antenne ; et un module de rayonnement comprenant un guide d'ondes qui comprend des premier et second guides d'ondes linéaires formés horizontalement dans une première direction linéaire tout en étant agencés en différentes positions espacées l'une de l'autre sur le côté supérieur de la chambre de cuisson, chacun des premier et second guides d'ondes linéaires ayant une pluralité d'antennes à fentes appariées formées sur sa surface inférieure, et diffusant les micro-ondes diffusées à partir de l'antenne vers la chambre de cuisson sur le côté inférieur à travers la pluralité d'antennes à fentes appariées tout en permettant aux micro-ondes de se déplacer le long des premier et second guides d'ondes linéaires.
PCT/KR2018/010034 2017-09-01 2018-08-30 Four à micro-ondes et module de rayonnement pour celui-ci WO2019045471A1 (fr)

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KR1020170111875A KR101840684B1 (ko) 2017-09-01 2017-09-01 전자 레인지 및 그의 방사 모듈

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Cited By (1)

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EP3518620A4 (fr) * 2016-09-19 2020-05-27 SP Range Ltd. Four à micro-ondes et module de rayonnement associé

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR102137467B1 (ko) * 2018-07-16 2020-07-24 유한회사 에스피앤파트너스 방사 모듈 및 이를 포함하는 전자 레인지
CN110337155B (zh) * 2019-07-03 2021-11-23 王学田 一种基布烘干用波导缝隙天线阵

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KR19990086348A (ko) * 1998-05-27 1999-12-15 윤종용 전자렌지
JP2004266426A (ja) * 2003-02-28 2004-09-24 Ntt Docomo Inc 導波管アレーアンテナ
KR20050058824A (ko) * 2003-12-12 2005-06-17 엘지전자 주식회사 전자레인지의 다중 도파관 구조
KR20070114995A (ko) * 2006-05-30 2007-12-05 주식회사 대우일렉트로닉스 슬라이딩 랙걸이를 구비하는 전자레인지
KR100819591B1 (ko) * 2006-10-31 2008-04-04 엘지전자 주식회사 조리기기

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Publication number Priority date Publication date Assignee Title
KR19990086348A (ko) * 1998-05-27 1999-12-15 윤종용 전자렌지
JP2004266426A (ja) * 2003-02-28 2004-09-24 Ntt Docomo Inc 導波管アレーアンテナ
KR20050058824A (ko) * 2003-12-12 2005-06-17 엘지전자 주식회사 전자레인지의 다중 도파관 구조
KR20070114995A (ko) * 2006-05-30 2007-12-05 주식회사 대우일렉트로닉스 슬라이딩 랙걸이를 구비하는 전자레인지
KR100819591B1 (ko) * 2006-10-31 2008-04-04 엘지전자 주식회사 조리기기

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP3518620A4 (fr) * 2016-09-19 2020-05-27 SP Range Ltd. Four à micro-ondes et module de rayonnement associé

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