WO2000003564A1 - Unite a impedance variable, dispositif l'utilisant, et four a micro-ondes - Google Patents
Unite a impedance variable, dispositif l'utilisant, et four a micro-ondes Download PDFInfo
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- WO2000003564A1 WO2000003564A1 PCT/JP1999/003661 JP9903661W WO0003564A1 WO 2000003564 A1 WO2000003564 A1 WO 2000003564A1 JP 9903661 W JP9903661 W JP 9903661W WO 0003564 A1 WO0003564 A1 WO 0003564A1
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- microwave
- movable body
- heated
- waveguide
- heating
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Classifications
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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
- H05B6/74—Mode transformers or mode stirrers
-
- 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
- H05B6/6402—Aspects relating to the microwave cavity
-
- 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
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/688—Circuits for monitoring or control for thawing
-
- 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
- H05B6/705—Feed lines using microwave tuning
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B40/00—Technologies aiming at improving the efficiency of home appliances, e.g. induction cooking or efficient technologies for refrigerators, freezers or dish washers
Definitions
- the present invention is used in conjunction with a waveguide transmitting a microphone mouth wave or a microphone mouth wave device for confining the microphone mouth wave, and acts on a microwave propagating in the structure to change the propagation content.
- the present invention relates to a variable unit, a microwave device using the same, and a high-frequency heating device.
- a metallic component is interposed in the transmission device of the microphone mouth wave of the waveguide, and a capacitive component or an impedance is provided as impedance in the waveguide.
- a method of adding an inductive component For example, a microphone that propagates through a waveguide by inserting a metal member from the H-plane (wide wall surface) of the waveguide in a direction substantially parallel to the E-plane (narrow wall surface) and adding a capacitance component to the waveguide. Some of them change the transmission characteristics of mouth waves.
- a metal member interposed in the waveguide is configured to be movable via a metal wall surface forming the waveguide.
- a device or a predetermined gap is provided between the metal member, which is the movable member, and the waveguide tube wall.
- a radio wave shielding mechanism is provided to prevent microwave leakage from the gap. Therefore, in this type of conventional waveguide, the structure for moving the metal member is complicated and requires a large-sized structure. I was
- a position of the microwave supply unit in the microwave space or a coupling method with the microwave space (magnetic field coupling or electric field coupling)
- a coupling method with the microwave space electromagnetic field coupling or electric field coupling
- a Schiller system in which metal blades provided in a microwave space for accommodating an object to be heated are rotated to diffusely reflect microwaves. This stirrer reflects the reflection direction of the microphone mouth wave incident on the blade in all directions, and it is difficult to reflect it toward a specific area. For this reason, it is difficult to selectively perform dielectric heating on a specific region of the object to be heated.
- the high-frequency heating device there is a turntable method in which an object to be heated housed in a microwave space is rotated.
- This turntable method promotes uniform heating of the heated object by moving the heated object itself with respect to the standing wave distribution generated in the microphone mouth wave space. Uniformization depends on the standing wave distribution generated in the microphone mouth wave space.
- the turntable method does not actively change the standing wave distribution itself in the microwave space.
- the high-frequency heating device disclosed in Japanese Patent Application Laid-Open No. 8-330066 changes the direction of the high-frequency current flowing on the wall surface of the microphone mouth space to switch the excitation mode generated in the microphone mouth space. Disclosure technology.
- a plate is used in which a plurality of openings are arranged in a row on the same surface, the plate surface is arranged substantially on the same plane as the microwave space wall surface, and the plate is driven to rotate.
- the high-frequency current flowing through the wall of the microwave space Has changed direction. Changing the direction of this high-frequency current changes the excitation mode in space.
- an excitation mode suitable for the object to be heated is selected to obtain a heating distribution suitable for the object to be heated.
- this technique is configured to rotate the aperture, and it is necessary to prevent the generation of sparks associated with rotating the metal member in the microwave space. For this reason, the structure of the spark prevention mechanism is complicated. Also, for the wavelength of the microwave radiated into the microwave space, the major axis dimension of the aperture needs to be at least 12 times the wavelength dimension. The rotation area necessary for rotating this opening occupies a large area on one wall surface of the microwave space in which the opening is provided. In the case of such a structure, the excitation mode that can be generated in the microwave space is limited by the influence of the opening or the gap for spark prevention, and it is very difficult to obtain a heating distribution suitable for the object to be heated. It was difficult. Disclosure of the invention
- the present invention solves the above problems, and provides a variable impedance unit having a compact configuration and high controllability while solving the problem of spark generation.
- the variable impedance unit by disposing the variable impedance unit on a wall surface defining a microwave space and variably controlling the impedance of the wall surface, the standing wave distribution generated inside the microwave space can be continuously and continuously varied.
- a high-frequency heating device that enables selective heating or uniform heating of an object to be heated using the microwave device.
- variable impedance unit includes: a waveguide section having one end terminated and the other end opened; a movable body provided in the waveguide section; and a movable body driving unit that drives the movable body. Is driven to vary the impedance at the open end of the waveguide. For this reason, this unit is located on any boundary surface of microwave space. The problem of radio wave leakage from the operating surface is eliminated by combining the operating surfaces of the ports.
- variable impedance unit of the present invention makes the propagation mode in the waveguide portion TE n0 (n is a positive integer) so that the action of the microwave incident from the open end on the movable body is independent of the value of n. Can be uniformed. Therefore, it is possible to easily make a design change to enlarge the working surface.
- the movable body can be rotated around a rotation axis that defines a distance from the end surface of the waveguide section, and the movable space of the movable body can be limited to a smaller space, so that the movable body is opened in a compact unit configuration.
- the impedance at the end can be variably controlled.
- the movable body can be moved while varying the distance between the movable body and the terminal surface of the waveguide part, so that the variable impedance range of the open end can be selected widely.
- the movable body is made of a non-metallic material, so that the dielectric breakdown voltage between the movable body and the waveguide can be increased, so that the reliability of the unit can be assured with respect to high-power microwave input. .
- the open end of the waveguide section when the impedance of the open end of the waveguide section is zero, the open end can act in the same manner as a metal wall surface, and the characteristics can be easily compared with the case where the variable impedance unit is not used. .
- the microphone mouth wave action at the open end can be maximized.
- the impedance of the open end of the waveguide portion can form an impedance of an inductive component and a capacitive component with zero as a center.
- Such a unit can be used for alignment adjustment.
- variable impedance unit of the present invention the position of the movable body is detected by the position detecting means, and the microwave action at the open end of the waveguide can be clearly controlled based on the signal of the position detecting means. . Further, the position of the movable body is determined based on the signal of the microwave detecting means, so that the Also, the position of the movable body can be determined, so that another position detecting means can be eliminated.
- the variable impedance unit of the present invention can detect the standing wave distribution in the waveguide to determine the operation state of the unit and to guarantee the operation reliability of the unit.
- variable impedance unit of the present invention is provided with a stepping motor for movably driving the movable body, and by freely controlling the stay time in each step, various combinations of impedance values including a time factor are included. Can be controlled.
- variable impedance unit of the present invention is configured such that the end face and the open end face of the waveguide section are formed so that the angle formed by the mutual faces is approximately 90 degrees, so that the length of the waveguide section is long. Even in this case, the unit can be incorporated into a microwave device in a flat shape.
- the movable body is driven to rotate and a plurality of movable bodies are arranged in the waveguide section.
- the variable range of the impedance at the open end of the waveguide section is improved. It can be varied greatly and the range of microwave action can be maximized.
- the microphone mouth wave device of the present invention includes: a microwave space for substantially confining a fed microphone mouth wave; an opening provided on a metal wall forming the microwave space; and an impedance variable unit. It is possible to form various standing wave distributions corresponding to the impedance value of the aperture in the microphone mouth wave space.
- the microwave device of the present invention may further include a microwave space formed of a substantially rectangular hexahedron substantially confining the fed microwave, an opening provided on at least one surface of the rectangular hexahedron, An impedance variable unit that changes the impedance, and the nodes or antinodes of the standing wave distribution generated in the microwave space are moved linearly by changing the impedance of the aperture on the wall of the microwave space.
- the microwave device of the present invention can provide multiple propagation of the microphone mouth wave or various standing wave distributions in the microphone mouth wave space by providing the aperture and the variable impedance unit connected thereto. it can.
- multiple openings are provided so that the high-frequency current flowing on the wall of the microphone mouth wave space can be divided and flow independently for each excitation mode. I do. Then, by changing the impedance of each opening, only a desired single excitation mode can be generated in the microphone mouth wave space.
- the high-frequency heating device includes: a microwave space for storing an object to be heated; a high-frequency generating unit that generates a microwave radiated into the microwave space; and the microphone based on heating information of the object to be heated. It is configured to include a variable impedance unit provided in the mouth wave space and control means for controlling the high-frequency generation means and performing dielectric heating on the object to be heated. With this configuration, the impedance value of the opening or the amount of microwave energy generated from the high frequency generating means is controlled to selectively heat a specific area of the object to be heated or to heat the entire object to be heated. This can promote uniformity of the surface.
- the high-frequency heating device of the present invention further has means for rotating and moving the object to be heated in the microwave space. Controlling the standing wave distribution in the microwave space by controlling the variable impedance unit and controlling the rotational movement of the object to be heated housed in the microwave space by controlling the mounting table drive means to heat the object It is possible to further promote uniform heating of the whole object.
- the high-frequency heating device of the present invention can temporally fluctuate the standing wave distribution in the microphone mouth wave space by controlling the variable impedance unit. Therefore, it is possible to promote uniform heating of the object to be heated even when the object to be heated is difficult to rotate.
- the high-frequency heating device of the present invention can enhance convenience by automatically controlling the optimum heating distribution for the object to be heated.
- the high-frequency heating device of the present invention can increase the variable speed of the impedance of the variable impedance unit. As a result, irregular reflection of microwaves in the microwave space can be promoted, and uniform heating of the object to be heated in the vertical direction can be promoted.
- the user can select and input any one of the heating information, that is, thawing, reheating, oven heating, or heat retention, which is a heating method of the object to be heated. Therefore, information that the high-frequency heating device is positioned as information that is difficult to detect (for example, the type of object to be heated, the shape of the object to be heated, the number of objects to be heated, and the thawing and reheating methods of heating the object to be heated)
- the control means determines a specific area of the object to be heated based on at least one input information selected and input from one of the following: heating, oven heating, and heat retention. They are roughly divided into those that selectively heat and those that heat the entire heated object.
- the water content of the object to be heated is used as a guide for the type of the object to be heated.
- the control means performs the entire heating. It recognizes the object and controls the variable impedance unit.
- the shape of the object to be heated it is recognized that the object is entirely heated in the case of a flat shape.
- the number of objects to be heated multiple cases are recognized as overall heating.
- the entire heating is given priority over other input information.
- the heating information is obtained as physical information from the high-frequency heating device or the object to be heated while the object to be heated is being heated.
- the apparatus is provided with a detecting means corresponding to the physical information.
- the physical information obtained from the high-frequency heating device is Alternatively, it is an electromagnetic field intensity signal in the variable impedance unit, and the physical information obtained from the object to be heated is selected from, for example, the weight of the object to be heated, the current temperature of the object to be heated, and the concentration of gas generated from the object to be heated. At least one piece of physical information.
- the above physical information is used as information for determining the control content to be executed by the control means during heating of the object to be heated.
- the information of the electromagnetic field strength in the microwave space or the variable impedance unit is heating control information such as heating control of an object to be heated, for which temperature detection is difficult, or prevention of dry burning without the object.
- the weight information of the object to be heated is information for detecting the degree of drying of the object to be heated and determining the control of heating or the end of heating.
- the temperature information of the object to be heated is used for variable control of the impedance value of the opening based on the current temperature of the object to be heated, variable control of the microphone mouth wave power supplied from the high frequency generator, or the object to be heated. Heating end detection information.
- the information of the gas concentration generated from the object to be heated is, for example, in the case of water vapor, information for determining the end of heating by reaching a predetermined vapor amount.
- variable impedance unit having a compact configuration and high controllability, and a microphone mouth wave device and a high frequency heating device using the same, which solve the problem of spark generation.
- the distribution of the standing wave generated inside the microphone mouth wave space can be varied continuously over time, and the object to be heated can be selectively or uniformly heated.
- FIG. 1 is a diagram showing the appearance of a variable impedance unit according to the first embodiment of the present invention
- FIG. 2 is a diagram showing microwave propagation in the variable impedance unit of FIG. 1
- FIG. 3 is a diagram showing the variable impedance unit of the present invention.
- FIG. 4 is a characteristic diagram showing the characteristic of the microwave wave opening of the movable body made of the nonmetallic material used.
- FIG. 4 is a diagram showing the phase value characteristic of the voltage reflection coefficient at the open end of the waveguide in one embodiment of FIG. 2
- FIG. FIG. 6 is a diagram showing the phase value characteristic of the voltage reflection coefficient at the open end of the waveguide section with respect to the rotation support angle of the movable body in one embodiment of FIG. 2.
- FIG. 4 is a characteristic diagram showing the characteristic of the microwave wave opening of the movable body made of the nonmetallic material used.
- FIG. 4 is a diagram showing the phase value characteristic of the voltage reflection coefficient at the open end of the waveguide in one embodiment of FIG
- FIG. 6 is a characteristic diagram of the signal detected by the microphone mouth wave detecting means of FIG. 7 is a sectional configuration diagram of the variable impedance unit of the second embodiment of the present invention
- FIG. 8 is a variable impedance unit of the third embodiment of the present invention
- FIG. 8A is a sectional configuration diagram thereof
- FIG. 9 shows a variable impedance unit according to a fourth embodiment of the present invention.
- FIG. 9A is a configuration diagram of a first control example
- FIG. 9B is a configuration diagram of a second control example.
- FIG. 10 is a configuration diagram of a microwave device according to a fifth embodiment of the present invention
- FIG. 11 is a diagram of an electric field distribution characteristic generated in the microwave device when the variable impedance unit of FIG. 10 is controlled.
- FIG. 11A is an electric field distribution when the movable body is supported at 90 degrees
- FIG. 11B is an electric field distribution when the movable body is supported at 0 degrees
- FIG. 12 is a sixth embodiment of the present invention.
- FIG. 13 is a sectional view of a high-frequency heating apparatus according to a seventh embodiment of the present invention
- FIG. 14 is a sectional view of a main part of FIG. 13
- FIG. 3 is an enlarged configuration diagram of the operation unit
- FIG. 16-8 shows a display example for each operation of the operation unit in FIG. 15, and FIG. FIG.
- FIG. 18 is a heating distribution diagram when a dummy load is heated using the high-frequency heating device of FIG. 13, and FIG. 19 is a first control content of the high-frequency heating device of FIG. 13.
- FIG. 20 is a diagram showing a second control content of the high-frequency heating device of FIG. 13
- FIG. 21 is a diagram showing a third control content of the high-frequency heating device of FIG. 13,
- FIG. 23 is an external configuration diagram of the high-frequency heating device of the eighth embodiment of the present invention
- FIG. 24 is a main part of FIG.
- FIG. 25 is an enlarged configuration diagram of the operation unit in FIG. 23, and FIG.
- FIG. 6 is a flowchart showing the control contents of the high-frequency heating device of FIG. 23,
- FIG. 27 is a heating distribution diagram when a pseudo load is heated using the high-frequency heating device of FIG. 23, and
- FIG. 28 is a high-frequency heating device of FIG.
- FIG. 4 is a vertical temperature characteristic diagram of a water load with respect to a variable speed of a variable impedance unit using a heating device.
- FIG. 1 is an external configuration diagram of a variable impedance unit showing a first embodiment of the present invention.
- the variable impedance unit 10 has a rectangular waveguide 11 made of a metal member as a main body, and one end of the waveguide 11 is a rectangle for guiding microwaves to the waveguide 11.
- An open end 12 having a shape is formed, while an end 13 of the waveguide 11 is closed with a metal member in order to reflect the microphone mouth wave propagated into the waveguide 11.
- a movable body 14 having a plate-like structure made of a nonmetallic material is provided in the waveguide 11.
- rotation axes 15 and 16 for rotating the movable body 14 are provided, and these rotation axes 15 and 16 are provided in holes provided on the wall surface of the waveguide 11. It is rotatably supported by the hole.
- the rotating shaft 16 is connected to the output shaft of a stepping motor 17 for driving the movable body 14 to rotate.
- the movable body 14 is made of a nonmetallic material such as a resin material or an inorganic material having a characteristic of low dielectric loss in a microwave band having a heat resistance temperature of 200 or higher, and the base material is specified. , And formed by firing or baking.
- the movable body 14 is disposed with a predetermined gap from the end 13 of the waveguide 11.
- the microwave detecting means 18 detects the electromagnetic field intensity in the waveguide 11 and extends the center conductor of the coaxial cable into the waveguide 11 through a hole provided in the wall of the waveguide 11. Let it be an antenna.
- Detection circuit 19 is detected by microwave detection means 18
- the microwave signal is detected, and is constituted by a planar circuit using the elements of the detection diode 20 and the chip capacitor 21.
- the microwave signal detected by the microwave detecting means 19 is output as a voltage signal through the detection circuit 19 through the lead wire 23.
- the variable impedance unit 10 is attached to the microphone mouthpiece with an attachment flange 24. Stepping mode 17 is held by support plate 25.
- the waveguide 11 in FIG. 2 is configured to propagate the TE10 mode, and has a cross-sectional configuration parallel to the H plane (the rectangular long axis surface of the rectangular waveguide).
- the gap between the movable body 14 and the wall surface of the waveguide 11 is not shown.
- FIG. 2 shows the traveling direction of the plane wave.
- the microwave 26 in the waveguide 11 propagates in the direction of the terminal 13 while being reflected on the E plane (the rectangular short axis surface of the rectangular waveguide) of the waveguide 11.
- the incident angle 0 1 when the microwave 26 enters the movable body 14 is determined by the width W 1 of the open end 12.
- the width dimension W1 is 80 mm
- the frequency of the propagating microwave is 2450 MHz
- the incident angle 01 is about 40.1 degrees.
- the microwave incident on the movable body 14 made of a non-metallic material is split into a reflected wave 27 and a transmitted wave 28 on the surface of the movable body 14.
- the reflected wave 27 at this time is referred to as primary reflection.
- the transmitted wave 28 propagates through the movable body 14 and is again divided into a reflected wave 29 and a transmitted wave 30 on the other surface of the movable body 14.
- the reflected wave 29 propagates through the movable body 14 and is further separated into a reflected wave 31 and a transmitted wave 32 on one surface.
- the transmitted wave 3 2 This will be referred to as secondary reflection.
- the transmitted wave 30 transmitted through the movable body 14 is reflected by the end 13 of the waveguide 11 and the E-plane of the waveguide 11 and is incident on the movable body 14 again. Then, the reflected wave 33 and the transmitted wave 34 are divided on the surface of the movable body 14.
- the transmitted wave 34 propagates through the movable body 14 and is split on one surface into a reflected wave (not shown) and a transmitted wave 35.
- the transmitted wave 35 at this time is referred to as post-transmission reflection.
- the length from the open end 12 to the center of the movable body 14 is L l
- the length from the center of the movable body 14 to the end 13 is L 2
- the plate thickness of 14 is t.
- the microwave energy held by the reflected wave and the transmitted wave will be described.
- ⁇ be the effective relative permittivity in the frequency band.
- the voltage reflection coefficient ⁇ on the layer surface of the movable body 14 is expressed by Equation 1.
- the angle ⁇ 2 is the transmission angle of the transmitted wave.
- Equation 2 Equation 2
- FIG. 4 shows the characteristics of the variable impedance unit of the present invention, and shows the phase value characteristics of the voltage reflection coefficient at the open end.
- the configuration of the variable impedance unit is as follows. As for the open end shape, the open end long axis W1 is 80 mm, its short axis is 30 mm, and L2 is 20 mm.
- the movable body 14 has a relative dielectric constant of 12.3, a plate thickness t of 6.2 mm, and width and length dimensions of the plate portion of 28 mm and 78 mm, respectively.
- FIG. 4 shows the characteristics of the phase value of the voltage reflection coefficient S11 at the open end 12 with respect to the change in the dimension L1 in the variable impedance unit having the above configuration.
- the rotation angle 0 of the movable body 14 is expressed as an angle in the direction shown in FIG. 2 based on the time when the movable body 14 is parallel to the terminal end 13 as shown in FIG.
- the phase value of the voltage reflection coefficient at the open end can be set to ⁇ 180 degrees, the impedance at the open end is made zero, and the open end is made of metal. The same effect as the wall surface can be obtained. Therefore, it is possible to easily check the characteristic comparison with the case where the variable impedance unit is not used.
- the unit configuration that allows the phase value of the voltage reflection coefficient at the open end to include 0 ° and ⁇ 180 ° as a phase value maximizes the variable width of the phase value of the voltage reflection coefficient at the open end, and makes the impedance variable. The entire operation involved can be easily confirmed, and an effective and wide-ranging operation can be realized.
- variable impedance unit having the characteristic indicated by the arrow 37
- the impedance of the inductive component and the capacitive component can be formed at the open end by rotating the movable body 14.
- FIG. 5 shows a characteristic example of the phase value of the voltage reflection coefficient S 11 at the open end with respect to the rotation support angle of the movable plate 14 in the variable impedance unit having the characteristics shown by the arrows 36 in FIG. .
- the supporting angle of the movable body 14 is rotated by 9 degrees per step by the stepping motor 17.
- the rotation support angle of the movable body 14 is as shown in the figure. From the characteristics in Fig. 5, when the support angle of the movable body 14 is near 0 degrees or near 180 degrees, the phase difference between the incident wave and the reflected wave of the microwave at the open end 12 is 180 degrees. The open end 12 acts like a metal wall. On the other hand, when the support angle of the movable body 14 is near 90 degrees, the phase difference between the incident wave and the reflected wave at the open end 12 becomes substantially zero.
- variable control of the heating area of the object to be heated can be realized by utilizing the phase difference between the incident wave and the reflected wave.
- the user can specify a desired heating region in high-frequency heating of the object to be heated.
- FIG. 6 shows an example of detection signal characteristics of the microphone mouth wave detecting means 18 with respect to the rotation angle of the movable body 14.
- the support angle of the movable body 14 can be determined.
- a support angle of 45 degrees which is closest to the microwave detection means 18, the electric field strength of the microphone mouth wave existing in the gap formed by the wall of the waveguide 11 and the movable body 14 becomes the maximum, and FIG. Indicated: characteristics.
- the signal detected by the microwave detection means 18 is a maximum value when the support angle of the movable body 14 is near 144 degrees, and conversely, the support angle can be determined. Also.
- the determination of the support angle of the rotating body 14 based on the microwave signal in the waveguide section can monitor an abnormal change in the characteristics of the entire variable impedance unit including the rotating body 14, and determine whether there is an abnormality. It is possible to perform the determination process of nothing and to eliminate the need for a dedicated angle detecting means, thereby eliminating the cost increase and the additional factor of guaranteeing the reliability of the detecting means.
- variable impedance unit according to the present invention will be described with reference to FIG.
- the second embodiment is different from the first embodiment in that the movable body is configured to be movable by changing the distance between the movable body and the end surface of the waveguide.
- the unit includes a waveguide section 38, an end face 39 of the waveguide section 38, an open end 40 of the waveguide section 38, a movable body 41, and a movable body 41 connected to the termination face 38. And a movable shaft 43 for moving the movable body 41, microwave detecting means 44, and a flange 45 for mounting the variable impedance unit.
- the movable shaft 43 is connected to the output shaft of the motor 42 via gears.
- the microwave energy having the primary reflection on the surface of the movable body 41 can be made 70% or more.
- the movable body 41 can be made of a metal material : i. is there.
- the end of the microwave propagating in the waveguide 38 is the surface of the movable body 41.
- the waveguide section 38 is closed except for the open end 40 due to the termination surface 39 originally included in the waveguide section 38. It is a body and does not require any countermeasures against microphone mouth wave leakage.
- the impedance of the open end 40 of the waveguide section 38 is limited to an inductive component. This is a particularly effective means because a simple and compact structure can be adopted.
- variable impedance unit of the present invention differs from the first embodiment in that the microwave working area at the open end is enlarged.
- FIG. 8A is a cross-sectional configuration diagram of the variable impedance unit according to the present embodiment
- FIG. 8B is a diagram illustrating a propagation mode in the waveguide when viewed from the open end.
- this unit is composed of a waveguide section 46, an open end 47 of the waveguide section 46, a termination end 48 of the waveguide section 46, and a movable body 49 driven to rotate.
- the waveguide 46 has a configuration in which the major axis dimension W 2 of the opening is about twice as large as that of the embodiment, and the TE 20 mode propagates in the waveguide 46. That is, as shown in FIG. 8B, when the inside of the waveguide 46 is viewed from the open end 47 of the waveguide, electric force lines indicated by 50 and 51 are generated in the waveguide 46. Will be.
- the TE n O mode (n is a positive integer) is the most effective mode for propagation in the waveguide. In other words, if this mode is used, the plate thickness of the movable body can be the same in any mode, and the impedance at the open end can be varied to a predetermined value based on the rotation support angle of the movable body. I can do it.
- Fourth embodiment
- the fourth embodiment differs from the first to third embodiments in that a plurality of rotatable movable bodies are provided in the waveguide.
- FIGS. 9A and 9B show examples of the rotation control of each rotating movable body in the variable impedance unit having two rotating movable bodies.
- this unit includes a waveguide section 52, an open end 53 of the waveguide section 52, an end 54 of the waveguide section 52, and a movable body 55, 5 having the same shape and rotationally driven. Consists of six. Based on the relative permittivity of the material used for the movable bodies 5 5 and 5 6 and the specifications of the thickness of the movable body, the distance from the open end L 3, the distance between each movable body L 4, and the distance to the terminal 5 4 L5 is specified for each.
- Each of the movable bodies 55 and 56 is configured to be able to independently control its rotation.
- the distance L3 between the movable body 55 and the open end 53 is 20 mm
- the distance 4 between each movable body is 40111111
- the distance L5 between the movable body 56 and the terminal surface 54 is 20 mm.
- An example of the characteristics when the open end shape is 80 mm and 30 mm in width and 30 mm, respectively, and the shape and specification of each movable body are the same as in the first embodiment will be described below.
- the rotation support angle 0 of the movable body 56 is set to 45 degrees or 135 degrees to provide two movable bodies.
- the impedance variable unit 52 can be set to a resonance state. That is, as shown in FIG. 9A, only the movable body 56 is controlled to rotate, and the variable impedance unit can be used as a resonance element or a matching element.
- FIG. 10 is a configuration diagram of a microphone mouth wave device according to a fifth embodiment of the present invention.
- the microwave device using the variable impedance unit has a microwave space 100, a waveguide 101 for transmitting a microphone mouth wave for feeding the microphone mouth wave space 100, and an impedance. It comprises a dance variable unit 102, a coupling hole 103 for mounting a magnetron as a high-frequency generation means on the waveguide 101, a waveguide 104, and a movable body 105.
- variable impedance unit on the microphone mouthpiece device.
- the microwave space 100 the width dimension W, the depth dimension D, and the height dimension H were set to 190 mm, 158 mm, and 100 mm, respectively.
- the microwave space 100 is generated in the microwave space 100 when the frequency of the microphone mouth wave is in the 250 MHz band without the variable impedance unit 102 mounted.
- the electromagnetic field distribution is such that the number of standing wave peaks generated in the width direction, depth direction and height direction is 2, 2, 0 (this standing wave is expressed as ⁇ 2 2 0>, and this notation method is The following applies).
- the variable impedance unit 102 has an open end shape of the waveguide 104 of 15 mm (H 1 in FIG.
- FIG. 11 shows the result of analyzing the electromagnetic field distribution of the microwave device having the above configuration using a computer.
- the impedance at the open end of the variable impedance unit 102 becomes almost zero, and the same effect as the metal wall surface is obtained.
- the electromagnetic field distribution is the same as the initial, 2 2 0>.
- variable impedance unit of the present invention when the variable impedance unit of the present invention is mounted in a microwave space, by changing the impedance of the open end of the variable impedance unit that interacts with the microwave in the space, the standing in the microwave space is changed. It is recognized that the wave distribution can be varied. Furthermore, a high-frequency heating device described below to which such a microwave device is applied can change the heating area of the object to be heated.
- FIG. 12 is a sectional view of a microwave apparatus according to a sixth embodiment of the present invention.
- the right wall surface 106, the left wall surface 107, the bottom wall surface 108, the rear wall surface 109, and the upper wall surface 110 are metal walls forming the microwave space 111.
- a power supply port 112 is provided on the right wall 106, and a waveguide 113 for transmitting a microphone mouth wave is connected to the power supply port 112.
- the coupling hole 114 is provided at one end of the waveguide 113, and the output antenna of the high-frequency generating means (not shown) is inserted into the coupling hole 114.
- the left side wall 107 and the back side wall 109 opposed to the right side wall 106 pass through the substantially central portion of each wall surface, and each has a substantially rectangular hole shape. 5, 1 16 are formed.
- the variable impedance units 117 and 118 having the functions described above are connected to the outside of the microwave space 111 of the apertures 115 and 116, respectively.
- the openings 115 and 116 are arranged in different directions from each other.
- the opening 115 is formed in the horizontal direction, and the opening 116 is formed in the vertical direction.
- the flow of microwaves reflected from the plurality of wall surfaces is changed, and various standing wave distributions are formed in the microwave device.
- the high-frequency heating device described later using this can variably control the distribution of the standing wave to more effectively and uniformly heat the object to be heated.
- variable impedance unit As shown in Fig. 12, the angle between the open end (ie, the opening) of the variable impedance unit, which is the microwave working surface, and the terminal surface of the variable impedance unit should be approximately 90 degrees.
- the variable impedance unit can be mounted flat on the wall of the microwave space.
- the space required for mounting can be reduced. Seventh embodiment
- variable impedance unit of the present invention Next, a high-frequency heating device using the variable impedance unit of the present invention will be described below.
- FIG. 13 is an external view of a high-frequency heating apparatus according to a seventh embodiment of the present invention
- FIG. 14 is a cross-sectional configuration view of a main part of FIG.
- the microwave space 200 is composed of a metal material on the right side wall 201, left side wall 202, back wall 203, top wall 204, bottom wall 200 5 and a front opening / closing wall 206, which is an opening / closing wall through which the object to be heated enters and exits the microwave space 200, is formed in a substantially rectangular parallelepiped shape so that the supplied microwave can be substantially confined in the inside It is configured.
- Magnetron 2 07 is my This is a high-frequency generation unit that generates a microwave to be supplied to the microwave space 200.
- the waveguide 208 guides the microwave generated by the magnetron 207 into the microwave space 200.
- the power supply port 209 microwave-couples the microwave space 200 and the waveguide 208 to each other and radiates the microwave generated by the magnetron 207 into the microwave space 200. .
- the opening portion 210 has a substantially rectangular hole shape on the left wall surface 202.
- the variable impedance unit 211 is formed spatially continuous with the opening 2110.
- the impedance variable unit 2 1 1 is provided outside the microwave space 200 and has a groove plate 2 1 2 made of a metal material and a left wall surface 2 0 2 made of a metal material disposed so as to cover the opening 2 10.
- the structure is such that a dielectric plate 214 serving as a movable body is provided inside the waveguide portion 214 formed by the above.
- the waveguide section 2 13 has a predetermined waveguide section depth dimension L 8 (not shown), and has a groove height dimension L 9 substantially equal to the aperture dimension H 2 of the aperture section 210. It has a shape that has.
- the end of the waveguide portion 2 13 is configured to substantially close the microwave by the groove plate 2 12.
- the dielectric plate 214 constituting the variable impedance unit 211 is configured to be driven to rotate, and is provided with rotation driving means (not shown).
- the operation section 215 is provided on the front of the apparatus main body.
- the operation section 215 has a heating area selection input section 216 for selecting a heating area of the object to be heated and a microwave to the object to be heated.
- Display means 2 17 for displaying the flow of the flow is provided. Details of these will be described later.
- the invar overnight drive power supply unit 218 drives the magnetron 207.
- the control means 219 controls the operation of the entire apparatus.
- the microwave detecting means 220 inputs a signal obtained by being combined with the microwave in the waveguide part 212 to the control means 219.
- the infrared temperature detecting means 222 detects the surface temperature of the object to be heated via the hole 222 provided in the upper wall surface 204, and inputs the detected signal to the control means 219.
- the control means 2 19 Based on the heating information input from the working unit 215 and the signals from the microwave detection means 220 and the infrared temperature detection means 221, the operation of the inverter drive power supply unit 218 and the dielectric plate The operation of the rotation drive means for rotating the 2 14 is controlled.
- the high-frequency heating device can microwave-heat the object to be heated stored in the microwave space 200 under optimal conditions.
- the see-through window 224 is provided at a substantially central portion of the front opening / closing wall 206 and has a punching hole through which the microwave space 200 can be seen.
- the door latch switch 2 25 determines the closed state of the front opening / closing wall 206.
- FIG. 15 is an enlarged configuration diagram of the operation unit in FIG. 13, and FIGS. 16A to 16D show display examples according to the control contents of the main parts in FIG. A characteristic configuration according to the present invention will be described with reference to the above-described drawings.
- Various input items selected and input by a user when heating and cooking an object to be heated are arranged in the operation unit 2 15. These are selection input items related to the heating method menu for the object to be heated, and consist of a “thaw” key 2 26, a “heat” key 2 2 7 for reheating, and a “warm” key 2 2 8 .
- These input keys are for automatically controlling the dielectric heating of the object to be heated, and the control means 219 controls the variable impedance unit based on the control content determined in advance based on each input information.
- a heating area selection input section 2 16 for selecting a heating area of the object to be heated is provided in the operation section 2 15 and an object to be heated.
- Display means 2 17 for displaying the flow of microwaves to the The heating area selection input section 2 16 is a heating item “left” key 2 29 that sets the left side of the object to be heated as the heating area when viewed from the front of the device.
- the display means 2 17 has a pattern 233 of the object to be heated disposed in the center of the display means, and the arrow shows how the microwave is propagated to the object to be heated. You. That is, the state in which the microwave is propagated from the left, right, and above can be displayed by arrows 234 to 236.
- the display means shown in Fig. 13 to Fig. 15 indicate that "center” is selected and input as the heating item, and the arrow indicating the propagation of the microphone mouth wave is displayed upward 2 3 6 It is shown.
- arrows 234 and 235 shown by left and right broken lines are provided for explaining the displayed contents, and are not displayed as shown in FIG. 16 in an actual use environment. Also, as shown in Fig. 16, the pattern of the object to be heated 23 3 a to 23 3 d displayed in the center of the display means 2 17 is changed according to each heating item as shown in FIG. The convenience is enhanced so that the user can visually confirm the desired heating mode.
- FIG. 16A shows that the pattern 2 33 a heats the coffee and hamburger, and shows that the coffee is more strongly heated to the hamburger.
- Figure 16B shows that the pattern 2 33 b heats the food in a flat, small container and focuses the microwaves in the spatial area of the food.
- Figure 16C shows that pattern 2 3 3c heats the mixed ingredients, for example, causing the right hamburger to heat more strongly to the left vegetables.
- FIG. 16D shows that the pattern 233 d heats a large amount of the object to be heated, which means that the microwave is dispersed and heated as a whole. It should be noted that a different pattern can be displayed for the above-described pattern by pressing the shape selection key 237.
- the specific contents of the rotation support angle of the dielectric plate 214 with respect to each heating item are as follows. “Left” has a support angle of 0 degrees, “center” has a support angle ; 45 degrees, “right” has a support angle of 90 degrees, and “whole” has continuous rotation at a predetermined speed.
- the user can easily confirm the content of the selected heating item and recognize the consistency between the heating state after heating and the selected heating item.
- Easy-to-use high-frequency heating device It can be.
- the user determines a heating area for heating the object to be heated and selects one of the above-mentioned heating items (S101).
- the user determines a heating area for heating the object to be heated and selects one of the above-mentioned heating items (S101).
- pressing the "Start" key 241 shown in Fig. 15 S102
- the key input judgment S103 is for confirming that the "start” key 241 has been pressed, and when the "cancel” key 242 is pressed prior to the "start” key 241 (S103). 10 Return to 1).
- the control means 219 operates the stepping motor which is a rotation driving means of the dielectric plate 214 based on the input information from the operation unit 215 to set the dielectric plate 214 to a desired support angle or continuously rotate the dielectric plate 214. I do.
- the dielectric plate 214 is rotated stepwise to set a position at a support angle of 45 degrees (315 degrees) at which the signal of the microwave detection means 220 has a maximum value. After the detection, the dielectric plate is set at a desired support angle (S104).
- the Invar evening drive power supply 218 starts the operation and generates a microwave from the magnetron 207 (S105).
- the heating state of the object to be heated is monitored in the heating information acquisition during heating (S106), and when the heating end determination (S107) becomes "Yes", it is determined that the heating is ended. Then, the Invar evening drive power supply unit 218 stops operating, and the magnetron 207 turns off (S108). Thereafter, the energization of the stepping motor for controlling the rotational driving of the dielectric plate 214 is stopped, and the microwave heating of the object to be heated is completed (S109).
- the monitoring of the heating state in S106 to S107 and the content of the termination judgment based on the monitoring are based on the information of the heating time inputted from the operation unit 215, the detection signal of the microwave detection means 220 or the detection signal of the infrared temperature detection means 221. Based on the information It can be executed by comparing or comparing with an end determination criterion.
- the heating information is not limited to the above information, and may be based on, for example, sensor information for detecting gas or water vapor generated by the object to be heated.
- Microwave space 200 is width 3 10 mm depth 3 10 mm height 2 1
- Adhesive synthetic glue polyvinyl alcohol 13.7 to 14% permanent solution manufactured by Sekisui Jushi Co., Ltd. was used as the heating load. This adhair synthetic glue is colorless in the temperature range of 0 to 45 degrees and becomes cloudy when the temperature exceeds 45 degrees.
- FIG. 18 shows a heating distribution using 200 g of the above-mentioned adohair synthetic paste.
- the bottom area of the container containing the adhair synthetic paste is 100 square mm.
- the microwave output was set to 500 W and the heating distribution after heating for 40 seconds was shown.
- the white area is the heated area.
- the rotation support angles of the dielectric plate 2 14 are “left” for the heating items for selecting the heating area arranged in the operation unit 2 15 described above, and “left” for keys 22 9 and 45 for “45”. "Center" key 2 3 0 and 9
- the “center” heating item with the heating area at the center in the microwave space and the “left” and “right” heating items with the heating area at the periphery in the microwave space, it is possible to cover various shapes and arrangements. It is possible to provide a high-frequency heating device that can freely designate a central portion and a peripheral portion of a heated object as a heating region, and can perform an optimal heating according to an object to be heated or a user's favorite.
- the synthetic adhesive of hair has a large dielectric loss and a small penetration depth as compared with water.
- Central heating can be achieved using items.
- control means 219 Next, more specific control contents of the control means 219 will be described with reference to FIGS.
- Fig. 19 shows an example of controlling the "whole" heating item
- the control means 219 controls the microwave output of the magnetron 207 and the rotation speed of the dielectric plate 2 14 of the variable impedance unit. . That is, the control unit 219 controls the rotation speed of the dielectric plate 214 and the microwave output in conjunction with each other for the purpose of dispersing the microwaves in the entire microwave space.
- the microwave output is large, the dielectric plate 214 is rotated at 100 rpm, and when the microwave output is small, the dielectric plate is rotated at 100 rpm.
- the switching timing is controlled by heating information obtained from the object to be heated or a signal from the microwave detecting means.
- Fig. 20 shows an example of cooking control of the "Thaw” menu.
- the control means 2 19 sets the dielectric plate 2 14 at 100 revolutions per minute and the standing wave distribution in the microwave space is always large. To prevent local heating. On the other hand, the microwave output is large at the beginning and low in the latter half.
- FIG. 21 shows an example of the heating control based on the intention of the user, and the control means 219 defines the dielectric plate 214 at an angle corresponding to the input selected heating area.
- the control means 219 defines the dielectric plate 214 at an angle corresponding to the input selected heating area.
- Figure 22 shows an example of automatic heating control based on temperature information associated with the heating of the heated object in the ⁇ center '' heating item.
- the microphone mouth wave output is reduced and The dielectric plate 2 14 is rotated at 10 revolutions per minute to perform the final finishing of heating.
- FIG. 23 is an external view of a high-frequency heating device according to an eighth embodiment of the present invention
- FIG. 24 is a cross-sectional view of a main part of FIG. 23
- FIG. 25 is an enlarged view of the operation unit of FIG.
- FIG. 6 is a flowchart showing the control contents of FIG.
- the mounting table 2 43 mounts an object to be heated.
- the support table 2 4 4 supports the mounting table 2 4 3.
- the motor which is the mounting table driving means 2 4 5 rotates the mounting table 2 4 3 via the support 2 4 4.
- the weight detecting means 246 detects the weight of the object to be heated placed on the mounting table 243 via the support 244 and inputs a detection signal to the control means 247.
- the heaters 248 and 249 configured in a planar shape are joined and assembled to the upper wall surface 204 and the bottom wall surface 205 of the microwave device 250, respectively. Heating information is input from the operation unit 25 1.
- the gas detecting means 252 detects the amount of water vapor generated from the object to be heated.
- the power supply port 209 and the opening 2110 are configured to be covered with plates 253 and 254 of a heat-resistant inorganic material, respectively.
- the configuration in which the operation unit 25 1 shown in FIG. 25 is different from that of the seventh embodiment is different from the seventh embodiment in that a microwave flow 255 from below the object to be heated is added to the display unit 255.
- An operation key 257 for manually controlling the rotation of the table 243 is provided, and an oven heating input key 258 is added.
- the user determines a heating area for heating the object to be heated and selects one of the above-mentioned heating items (S201).
- the heating time was entered (specified by 238 to 240 in Fig. 25).
- pressing the “Start” key 241 shown in FIG. 25 S202
- the key input determination S203 is for confirming that the "start” key 241 has been pressed, and when the "cancel” key 242 is pressed prior to the "start” key 241 ( Return to S201).
- the control means 247 takes in the detection signal of the weight detection means 246 immediately after the start of heating (S204). After that, based on the heating information and the weight signal input from the operation unit 251, the stepping motor, which is the rotation driving means of the dielectric plate 214, is operated to set the dielectric plate 214 to a desired support angle or to continuously rotate the dielectric plate 214. Or When the dielectric plate 214 is set at a desired support angle, the dielectric plate 214 is rotated stepwise to set the position of the support angle—45 degrees (315 degrees) at which the signal of the microphone mouth wave detecting means 220 has a maximum value. After the detection, the dielectric plate is set at a desired support angle (S205).
- control means 247 sends a control signal to the mounting table driving means 245 to control the operation of the mounting table driving means (S206), and then starts the operation of the inverter driving power supply 218 to transmit microwaves from the magnetron 207. Generate (S207).
- the heating state of the object to be heated is monitored (S208), and when the heating end determination (S209) becomes “Yes”, it is determined that the heating has ended and the inverter drive power supply unit 218 stops operating and the magnetron 207 is turned off. (S210). Thereafter, the mounting table driving means stops the control and stops the mounting table (S211). The stepping motor for controlling the rotational drive of the dielectric plate 214 stops the energization and completes the microwave heating of the object to be heated (S212).
- the monitoring of the heating state from (S208) to (S209) and the end determination based on the monitoring are based on the information on the heating time input from the operation unit 251 and the detection signal of the microwave detection unit 220 or the detection signal of the gas detection unit 252. Based on the detection signal, the information is checked or compared with the end judgment criterion every moment and executed.
- the heating information is not limited to the above information.
- the seventh embodiment May be based on the temperature information of the object to be heated described in the above.
- the microwave space 250 has a width of 300 mm, a depth of 320 mm, and a height of 215 mm, and has excitation modes of 332> and ⁇ 412>.
- An opening 210 is provided to cut off the flow of the high-frequency current induced on the metal wall corresponding to the excitation mode 332>.
- the height of the mounting table 243 from the bottom wall of the microwave device 250 was about 27 mm.
- the above-mentioned adohair synthetic glue was used as a heating load.
- FIG. 27 shows a heating distribution using 200 g of the above-mentioned adohair synthetic glue.
- the bottom area of the container containing the pad hair synthetic glue is 100 square mm.
- the microwave output is 500W
- the heating distribution after heating for 60 seconds is shown.
- the white area is the heated area.
- the “whole” key 232 was selected for the heating item, and the rotation speed of the dielectric plate 214 was set to 15 rotations per minute.
- the heating distribution in FIG. 27A shows the case where the mounting table 243 is stopped, and the heating distribution in FIG. 27B shows the case where the mounting table 243 is rotated 6 times per minute.
- the excitation mode 332> is broken and the excitation mode 412> is increased.
- the excitation mode 412> is an excitation mode in which a microphone mouth wave is concentrated at the center of the mounting table in the microwave space 250.
- the collapse of the 332> and 332>, the collapse of the ⁇ 412> and ⁇ 412>, and the excitation mode in the microwave space 250 can all form the collapse. it can.
- a heating distribution as shown in FIG. 27 (a) can be generated.
- the rotation of the mounting table 243 is superimposed on the continuous rotation of the dielectric plate 214, the entire peripheral portion of the object to be heated can be heated as shown in FIG. 27 (b).
- the object to be heated is concentrically heated by variously combining the dielectric plate 2 14 at a predetermined angle or continuously rotating and the rotation stop or continuous rotation of the mounting table. It is possible to heat only the object, or to promote uniform heating of the whole object to be heated. As a result, a high-frequency heating device with greatly improved convenience can be provided.
- a control method in which the rotation of the mounting table is stopped and only the dielectric plate 214 is continuously used is used, the central portion of the object to be heated is made similar to the peripheral portion. It can be heated strongly. Therefore, it is effective for cooking foods with a low microwave penetration depth, such as Hachenberg, stew, and chawanmushi.
- Figure 28 shows heating of water 200 cc at initial temperature 7 ⁇ 2 with microwave output 500 0 ⁇ for 1 minute 30 seconds with the rotation speed of dielectric plate 2 14 as a parameter. It shows the vertical temperature difference of 200 cc of water after the heat treatment.
- a cylindrical container having a diameter of 72 mm equivalent to a mug was used as a container containing water 200 cc.
- the control method of rotating the dielectric plate 214 at high speed can promote the dispersion of the microphone mouth wave in the vertical direction in the microphone mouth wave space, and can increase the volume of the heated material with respect to the bottom area. This is effective in making the heating of the powder uniform. That is, the high-frequency heating device having the above characteristics can be optimally heated when warming milk, alcoholic beverages, and coffee. Industrial applicability
- variable impedance unit is capable of transmitting a microphone mouth wave in a microphone mouth wave circuit such as a microwave transmission line or a microphone mouth wave resonator.
- a microphone mouth wave circuit such as a microwave transmission line or a microphone mouth wave resonator.
- This is an impedance variable unit with a simple structure and high controllability that acts on the microwaves of the main circuit through openings provided in the walls forming the boundaries to variably control the propagation characteristics of the microwaves.
- the configuration in which the variable impedance unit of the present invention is provided along with the main circuit allows flexibility in assembling and mounting of a device using the unit.
- variable impedance unit of the present invention when used as an apparatus for heating and cooking, it is possible to obtain a high degree of freedom in heating an object to be heated as a whole or in a region-selective manner, thereby enabling a wide range of cooking.
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- Constitution Of High-Frequency Heating (AREA)
Description
Claims
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP99929726.0A EP1096833B1 (en) | 1998-07-08 | 1999-07-07 | Variable-impedance unit, microwave device using the unit, and microwave heater |
US09/743,404 US6469286B1 (en) | 1997-11-13 | 1999-07-07 | Variable-impedance unit, microwave device using the unit, and microwave heater |
Applications Claiming Priority (4)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP10/192535 | 1998-07-08 | ||
JP19253598A JP3864570B2 (ja) | 1998-07-08 | 1998-07-08 | 高周波加熱装置 |
JP28625398A JP2000113975A (ja) | 1998-10-08 | 1998-10-08 | 高周波加熱装置 |
JP10/286253 | 1998-10-08 |
Publications (1)
Publication Number | Publication Date |
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WO2000003564A1 true WO2000003564A1 (fr) | 2000-01-20 |
Family
ID=26507378
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/JP1999/003661 WO2000003564A1 (fr) | 1997-11-13 | 1999-07-07 | Unite a impedance variable, dispositif l'utilisant, et four a micro-ondes |
Country Status (4)
Country | Link |
---|---|
EP (1) | EP1096833B1 (ja) |
KR (1) | KR100380313B1 (ja) |
CN (1) | CN1144506C (ja) |
WO (1) | WO2000003564A1 (ja) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6614010B2 (en) | 2000-02-25 | 2003-09-02 | Personal Chemistry I Uppsala Ab | Microwave heating apparatus |
Families Citing this family (10)
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CN105722263B (zh) | 2011-08-31 | 2019-02-19 | 高知有限公司 | 使用rf辐射的物体加工状态感测 |
CN105048104A (zh) * | 2014-04-06 | 2015-11-11 | 胜利微波股份有限公司 | 具有用于对波束下倾角的电控制的介电板的缝隙阵列天线 |
WO2015173601A1 (en) * | 2014-05-13 | 2015-11-19 | Centre National De La Recherche Scientifique - Cnrs - | A microwave oven |
JP6874756B2 (ja) | 2016-02-17 | 2021-05-19 | パナソニック株式会社 | マイクロ波加熱装置 |
CN105737540A (zh) * | 2016-03-05 | 2016-07-06 | 何朝武 | 一种智能调节干燥系统 |
CN105737219B (zh) * | 2016-04-01 | 2017-11-14 | 广东美的厨房电器制造有限公司 | 微波炉 |
US10850252B2 (en) | 2016-05-13 | 2020-12-01 | Microwave Chemical Co., Ltd. | Microwave treatment apparatus and program |
CN111201835A (zh) * | 2017-08-15 | 2020-05-26 | 高知有限公司 | 六端口功率测量 |
CN110081475B (zh) * | 2019-04-30 | 2020-09-01 | 广东美的厨房电器制造有限公司 | 微波炉的控制方法、系统及微波炉 |
CN110996423B (zh) * | 2019-12-30 | 2022-05-17 | 广东美的厨房电器制造有限公司 | 微波烹饪设备的时间分配系数的生成方法、装置及设备 |
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Also Published As
Publication number | Publication date |
---|---|
EP1096833A1 (en) | 2001-05-02 |
KR100380313B1 (ko) | 2003-04-14 |
CN1313021A (zh) | 2001-09-12 |
EP1096833B1 (en) | 2013-04-17 |
CN1144506C (zh) | 2004-03-31 |
EP1096833A4 (en) | 2006-05-17 |
KR20010079514A (ko) | 2001-08-22 |
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