WO2019181318A1 - 高周波加熱装置 - Google Patents
高周波加熱装置 Download PDFInfo
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- WO2019181318A1 WO2019181318A1 PCT/JP2019/005739 JP2019005739W WO2019181318A1 WO 2019181318 A1 WO2019181318 A1 WO 2019181318A1 JP 2019005739 W JP2019005739 W JP 2019005739W WO 2019181318 A1 WO2019181318 A1 WO 2019181318A1
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- WIPO (PCT)
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- frequency power
- transmission line
- wave transmission
- surface wave
- heated
- Prior art date
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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
- H05B6/66—Circuits
- H05B6/68—Circuits for monitoring or control
- H05B6/686—Circuits comprising a signal generator and power amplifier, e.g. using solid state oscillators
-
- 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
Definitions
- the present invention relates to a high-frequency heating apparatus that heats an object to be heated through a surface wave transmission line using a periodic structure.
- the high-frequency power that propagates through the surface wave transmission line is Is absorbed by the object to be heated installed in the vicinity. Thereby, the high frequency power attenuates as it propagates through the surface wave transmission line.
- the object to be heated is a surface wave transmission line.
- the power supply side is strongly heated.
- the heating of the object to be heated becomes weaker as the distance from the power feeding side increases. Thereby, the heating unevenness occurs in the object to be heated with respect to the propagation direction of the high frequency power in the surface wave transmission line.
- the high-frequency thawing heating device described in Patent Document 1 is configured such that one end of the installation base on which the object to be heated is supplied and the high-frequency power supplied to the surface wave transmission line is vertically movable, and the installation base is tilted upward. Is provided. Thereby, in the article to be heated, the feeding side of the surface wave transmission line is strongly heated, and the heating becomes weaker as the distance from the feeding side is reduced. As a result, it is said that the frozen portion of the frozen sushi can be efficiently thawed or heated using the surface wave transmission line.
- the present invention provides a high-frequency heating device that can uniformly heat a heated object and prevent rolling of the heated object with respect to the propagation direction of the high-frequency power of the surface wave transmission line.
- the present invention is a high-frequency heating apparatus that heats an object to be heated installed on an installation table.
- the high-frequency heating device includes at least one surface wave transmission line provided in the vicinity of the installation table, at least one high-frequency power generation unit that generates high-frequency power, and directly supplies high-frequency power to the surface wave transmission line, One high-frequency power feeder is provided.
- the surface wave transmission line is configured to have an inclination with respect to the propagation direction of the high frequency power so that the distance between the surface wave transmission line and the installation base becomes large on the high frequency power feeding unit side, and the surface wave transmission It is arranged on the track.
- the distance between the installation table and the surface wave transmission line becomes smaller without moving the installation table, as the distance from the high frequency power supply side of the surface wave transmission line increases.
- the absorption of the high-frequency power propagating through the surface wave transmission line into the object to be heated increases as the distance from the side of the surface wave transmission line to which the high-frequency power is supplied is increased.
- the high-frequency power of the surface wave transmission line can be uniformly heated with respect to the propagation direction.
- the installation table can be maintained in a horizontal state, it is possible to prevent the occurrence of problems such as the object to be heated installed on the installation table rolling.
- the high-frequency heating device of the present invention is provided with high-frequency power feeding portions at both ends of the surface wave transmission line, and the surface wave transmission line is substantially at the apex of the intermediate portion with respect to the propagation direction of the high-frequency power. You may comprise so that it may have the mountain-shaped inclination which becomes.
- high frequency power can be supplied from both ends of the surface wave transmission line. Furthermore, without moving the installation table, the distance between the installation table and the surface wave transmission line can be reduced as the distance from the power supply side of the surface wave transmission line increases. As a result, even when a plurality of objects to be heated are installed side by side with respect to the propagation direction of the high-frequency power of the surface wave transmission line, or when a heated object having a large length is installed, the high-frequency power of the surface wave transmission line The object to be heated can be heated more uniformly with respect to the propagation direction. Furthermore, since the installation table can be maintained in a horizontal state, it is possible to prevent the occurrence of problems such as the object to be heated installed on the installation table rolling.
- FIG. 1 is a block diagram showing a basic configuration of a high-frequency heating device according to Embodiment 1 of the present invention.
- FIG. 2A is a plan view showing a configuration of a high-frequency power feeding unit of the high-frequency heating device.
- FIG. 2B is a side view showing a configuration of a high-frequency power feeder of the high-frequency heating device.
- FIG. 3 is a diagram showing an example of the shape of the surface wave transmission line of the high-frequency heating device.
- FIG. 4 is a diagram showing an electric field strength distribution of high-frequency power propagating through a general surface acoustic wave transmission line.
- FIG. 5 is a diagram showing the electric field strength distribution of the high-frequency power during the heating operation of the object to be heated by the surface wave transmission line shown in FIG.
- FIG. 6 is a diagram showing a heating operation of the object to be heated by the surface wave transmission line of the high-frequency heating device in the same embodiment.
- FIG. 7 is a diagram illustrating another example of the shape of the surface wave transmission line of the high-frequency heating device according to the embodiment.
- FIG. 8 is a block diagram showing a basic configuration of the high-frequency heating device according to Embodiment 2 of the present invention.
- FIG. 9 is a view showing the shape of the surface wave transmission line of the high-frequency heating device.
- FIG. 10 is a diagram illustrating a heating operation of an object to be heated by a surface wave transmission line of a general high-frequency heating device.
- FIG. 11 is a diagram showing a heating operation of the object to be heated by the surface wave transmission line of the high-frequency heating device in the same embodiment.
- FIG. 12 is a diagram showing another example of the shape of the surface wave transmission line of the high-frequency heating device.
- FIG. 1 is a block diagram showing a basic configuration of the high-frequency heating device 100 of the first embodiment.
- the high-frequency heating device 100 includes an installation table 101, a surface wave transmission line 103 installed near the installation table 101, for example, below, a high-frequency power generation unit 110, and a high-frequency power supply unit 120. Etc.
- the high-frequency heating device 100 heats the object to be heated 102 installed on the installation table 101.
- the high frequency heating apparatus 100 shown in FIG. 1 has illustrated in the figure the example which has one surface wave transmission line, one high frequency electric power generation part, and one high frequency electric power feeding part, it is restricted to this. Absent.
- the number of surface wave transmission lines, high-frequency power generation units, and high-frequency power supply units is not limited to the above numbers, and may be two or more.
- the above-described high-frequency heating device 100 operates as follows.
- the high frequency power generation unit 110 generates high frequency power.
- the generated high frequency power is supplied to the surface wave transmission line 103 via the high frequency power supply unit 120.
- the fed high frequency power propagates near the surface of the surface wave transmission line 103 by a surface wave or is radiated from the vicinity of the surface. Thereby, the object to be heated 102 placed on the installation table 101 is heated.
- the high-frequency heating device 100 of the first embodiment is configured and operates.
- the high-frequency power generation unit 110 includes a high-frequency oscillator that outputs a high-frequency power having a frequency (for example, a microwave) and power suitable for the heat treatment of the article to be heated 102.
- a high-frequency oscillator that outputs a high-frequency power having a frequency (for example, a microwave) and power suitable for the heat treatment of the article to be heated 102.
- the high-frequency oscillator includes, for example, a magnetron and an inverter power supply circuit, a solid-state oscillator and a power amplifier.
- Magnetron is a type of oscillation vacuum tube that generates a powerful non-coherent microwave that is a type of radio wave, and is often used for high-power applications such as radar and microwave ovens of several hundred watts to several kilowatts. Since driving a magnetron requires a high voltage of several kilovolts, an inverter power supply circuit is generally used as a drive power supply.
- the inverter power supply circuit includes a converter circuit having a rectifying function, and an inverter circuit having a step-up (or step-down) function and an output frequency conversion function.
- the inverter power supply circuit is a technique widely used for lighting devices and motor control.
- the solid state oscillator is composed of a semiconductor oscillation circuit including a feedback circuit having high frequency electronic components such as a transistor, a capacitor, an inductor, and a resistor. Note that the solid-state oscillator is a technique widely used for an oscillator for low-power output such as a communication device.
- a solid-state oscillator that output high-frequency power of about 50 watts, but generally, oscillators that output high-frequency power of about several tens of milliwatts to several hundred milliwatts. Therefore, it cannot be used for heat treatment applications that require output power of several hundred watts. Therefore, a solid-state oscillator is usually used with a power amplifier composed of a transistor or the like that amplifies output high-frequency power.
- the structure of the high frequency electric power generation part 110 is not specifically limited, therefore Detailed description is abbreviate
- the high-frequency power feeding unit 120 corresponds to a power connection unit that feeds the high-frequency power generated by the high-frequency power generation unit 110 to the surface wave transmission line 103.
- FIGS. 2A and 2B show an example of the configuration of the high-frequency power feeder 120.
- FIG. 2A and 2B show an example of the configuration of the high-frequency power feeder 120.
- FIG. 2A is a plan view of the configuration around the high-frequency power feeding unit 120 as seen from above.
- FIG. 2B is a side view of the periphery of the high-frequency power feeder 120.
- a magnetron 111 is used as the high-frequency power generation unit 110 shown in FIG.
- the magnetron 111 is disposed so as to guide the generated high frequency power to the high frequency power feeding unit 120 using the rectangular waveguide 121.
- the rectangular waveguide 121 is mainly composed of a hollow waveguide used for transmission of electromagnetic waves such as microwaves.
- the hollow waveguide is a general waveguide and is formed of a metal tube having a square cross section (for example, a rectangle).
- the electromagnetic wave propagates through the rectangular waveguide 121 while forming an electromagnetic field according to the shape, size, wavelength or frequency of the rectangular waveguide 121.
- FIGS. 2A and 2B show the configuration using the rectangular waveguide 121 as an example, but the present invention is not limited to this.
- other power feeding methods such as power feeding using a loop antenna may be used.
- the surface wave transmission line 103 includes a metal periodic structure in which impedance elements are periodically arranged with a metal plate, a dielectric plate, or the like.
- a metal periodic structure for example, a stub type surface wave transmission line or an interdigital type surface wave transmission line is used.
- the stub type surface acoustic wave transmission line is formed by arranging a plurality of metal flat plates at regular intervals on a metal flat plate.
- the interdigital surface acoustic wave transmission line is formed by punching a metal flat plate into a cross-finger shape. For example, an alumina plate or a bakelite plate is used as the dielectric plate.
- the surface wave transmission line 103 is illustrated as an example using a stub type surface wave transmission line.
- the surface wave transmission line 103 concentrates the high frequency power supplied from the high frequency power generation unit 110 via the high frequency power supply unit 120 in the vicinity of the surface and transmits it by surface waves. Therefore, the surface wave transmission line 103 is disposed in the vicinity of the installation table 101. Then, the object to be heated 102 is placed on the installation table 101. As a result, the object to be heated 102 on the installation base 101 is heated by the high-frequency power transmitted in a concentrated manner near the surface of the surface wave transmission line 103.
- FIG. 3 is a diagram illustrating an example of the shape of the surface acoustic wave transmission line 103 according to the first embodiment.
- the surface wave transmission line 103 is configured to be inclined at a constant inclination angle 105 (for example, about 10 °) in the direction of the high-frequency power transmission direction 104.
- the surface wave transmission line 103 is disposed at an inclination angle 105 with respect to the installation table 101 in the vicinity of the installation table 101 arranged in a horizontal state.
- the distance d101 between the surface wave transmission line 103 on the high-frequency power feeder 120 side and the installation table 101 is larger than the distance d102 between the surface wave transmission line 103 on the other side and the installation table 101.
- the surface wave transmission line 103 is installed at an inclination angle 105 with respect to the installation table 101.
- the high-frequency heating device 100 supplies the high-frequency power generated by the high-frequency power generation unit 110 to the surface wave transmission line 103 via the high-frequency power feed unit 120.
- the object to be heated 102 installed on the installation table 101 disposed in the vicinity of the surface of the surface wave transmission line 103 is heated.
- the surface wave transmission line 103 has a distance d101 between the surface wave transmission line 103 in the vicinity of the high-frequency power feeder 120 and the end 101a of the installation base 101, and the surface wave transmission line 103 and the installation base 101 in the vicinity of the other side. It is arranged in the vicinity of the installation table 101 so as to be larger than the distance d102 with the end portion 101b. Therefore, the absorption rate of the high-frequency power propagating through the surface wave transmission line 103 to the object to be heated 102 absorbed through the installation base 101 increases as the distance from the high-frequency power supply side of the surface wave transmission line 103 increases. Become.
- the object to be heated 102 is also provided. Can be heated uniformly.
- the installation base 101 is arranged so as to maintain a horizontal state. Therefore, it is possible to prevent the occurrence of problems such as the object to be heated 102 installed on the installation table 101 rolling and moving. As a result, it is possible to more reliably prevent the occurrence of heating unevenness due to the movement of the article to be heated 102.
- FIG. 4 is a diagram showing the electric field strength distribution 141 of the high-frequency power propagating through the general surface wave transmission line 106.
- FIG. 5 is a diagram showing the electric field strength distribution 142 of the high-frequency power during the heating operation of the article to be heated 102 by the surface wave transmission line 106 shown in FIG.
- FIG. 4 shows the formation of the high frequency power generated by the high frequency power generation unit 110 in the vicinity of the surface of the surface wave transmission line 106 when the high frequency power supply unit 120 is supplied to the surface wave transmission line 106.
- the state of the electric field intensity distribution 141 is shown in shades.
- FIG. 5 shows that when a high-frequency power is supplied to the surface acoustic wave transmission line 106 shown in FIG.
- the state of the electric field strength distribution 142 formed by the high-frequency power is shown by shading.
- the high frequency power supplied to the surface wave transmission line 106 via the high frequency power feeder 120 propagates in the vicinity of the surface of the surface wave transmission line 106 with the surface wave.
- the high-frequency power forms an electric field strength distribution 141 in which the electric field strength near the surface of the surface wave transmission line 106 is strong (dark) and the electric field strength becomes weaker (lighter) as the distance from the surface of the surface wave transmission line 106 increases. Propagate while.
- the high frequency power supplied to the surface wave transmission line 106 via the high frequency power feeder 120 propagates in the vicinity of the surface of the surface wave transmission line 106 with the surface wave.
- the high frequency power is absorbed by the object to be heated 102 from the high frequency power feeding unit 120 side. Therefore, the electric field strength of the high frequency power propagating through the surface wave transmission line 106 is attenuated as it passes through the object to be heated 102 from the high frequency power feeder 120 side.
- an electric field strength distribution 142 as shown in FIG. 5 is formed.
- the high-frequency power feeding unit 120 side of the object to be heated 102 is often Heated.
- the high frequency power is absorbed by the heated object 102 as it passes through the heated object 102. Therefore, the high frequency power is gradually attenuated, and the high frequency power for heating the article to be heated 102 is weakened.
- the high-frequency heating device including the surface wave transmission line 106 heating unevenness occurs in the object to be heated 102 with respect to the propagation direction of the high-frequency power in the surface wave transmission line 106.
- FIG. 6 is a diagram illustrating a heating operation of the object to be heated 102 by the surface wave transmission line 103 of the high-frequency heating device 100 of the first embodiment.
- the surface wave transmission line 103 is disposed so as to be inclined with respect to the propagation direction of the high-frequency power. Then, the high frequency power generated by the high frequency power generation unit 110 is supplied to the surface wave transmission line 103 disposed at an inclination via the high frequency power supply unit 120. At this time, the heating state of the object to be heated 102 placed on the installation table 101 by the electric field strength distribution 143 formed by the high frequency power propagating through the surface wave transmission line 103 by the surface wave is shown by light and shade. Yes.
- the high frequency power supplied to the surface wave transmission line 103 via the high frequency power feeder 120 propagates in the vicinity of the surface of the surface wave transmission line 103 with the surface wave.
- the high frequency power is sequentially absorbed from the object to be heated 102 on the high frequency power feeding unit 120 side. Therefore, the electric field strength of the high-frequency power propagating through the surface wave transmission line 103 is attenuated as it passes through the object to be heated 102 from the high-frequency power feeder 120 side.
- the object to be heated 102 on the high frequency power feeding unit 120 placed on the installation base 101 is the surface wave transmission line 103. It is far from the vicinity of the surface. For this reason, the high-frequency power passing through the installation table 101 decreases according to the distance, so that the object to be heated 102 on the installation table 101 is not heated strongly. That is, the attenuation of high-frequency power propagating along the vicinity of the surface of the surface wave transmission line 103 is also reduced.
- the distance between the object to be heated 102 and the surface wave transmission line 103 decreases as the distance from the high-frequency power feeder 120 side increases.
- the high-frequency power passing through the installation base 101 becomes large because the distance from the surface wave transmission line 103 becomes small. That is, the degree of absorption of high-frequency power absorbed from the surface wave transmission line 103 to the object to be heated 102 via the installation table 101 is increased. Thereby, it is possible to balance the high-frequency power absorbed and attenuated by the article to be heated 102 and the increasing absorption of the high-frequency power of the article to be heated 102.
- a uniform electric field strength distribution 143 shown in FIG. 6 is formed on the installation table 101 with respect to the object to be heated 102 placed on the installation table 101.
- the object to be heated 102 can be uniformly heated with respect to the propagation direction of the high frequency power of the surface wave transmission line 103 while maintaining the installation table 101 in a horizontal state.
- the configuration using the surface wave transmission line 103 formed with a single slope as shown in FIG. 3 is described as an example, but the present invention is not limited to this.
- the surface wave transmission line 103 that contributes to the heating of the object to be heated 102 may be configured to be inclined with respect to the propagation direction of the high-frequency power in the region of the surface wave transmission line 103 (for example, the region facing the installation base 101). That is, the inclined region of the surface wave transmission line 103 may be disposed so that the distance between the surface wave transmission line 103 and the installation base 101 is increased on the high frequency power feeding unit 120 side.
- the horizontal portion 107a and the surface acoustic wave transmission line 107 formed by combining the horizontal portion 107c and the inclined portion 107b shown in FIG. 7 may be used.
- the inclined portion 107b of the surface wave transmission line 107 is disposed so as to face the installation base 101 on which the article to be heated 102 is placed. Thereby, the same effect as Embodiment 1 can be acquired.
- the same reference numerals are given to components having the same functions as those of the high frequency heating apparatus 100 of Embodiment 1, and description thereof is omitted. Also, the description of the content having the same action as the high-frequency heating device 100 of Embodiment 1 is omitted.
- FIG. 8 is a block diagram showing a basic configuration of the high-frequency heating device 200 of the second embodiment.
- the high frequency heating apparatus 200 includes a surface wave transmission line 203 instead of the surface wave transmission line 103, a high frequency power generation unit 210 instead of the high frequency power generation unit 110, and a first high frequency power instead of the high frequency power supply unit 120.
- 1 is different from the high-frequency heating device 100 of the first embodiment shown in FIG. 1 in that it includes two high-frequency power supply units 220 including a power supply unit 220a and a second high-frequency power supply unit 220b.
- the first high-frequency power feeder 220a and the second high-frequency power feeder 220b are collectively described, they are described as the high-frequency power feeder 220.
- a configuration having one surface wave transmission line 203, one high-frequency power generating unit 210, and two high-frequency power feeding units 220 is illustrated as an example. Not limited.
- the number of surface wave transmission lines, high frequency power generation units, and high frequency power supply units is not limited to the above numbers.
- the above-described high-frequency heating device 200 operates as follows.
- the high-frequency heating device 200 generates high-frequency power at the high-frequency power generation unit 210.
- the generated high-frequency power is distributed into two and supplied to both ends of the surface wave transmission line 203 via the first high-frequency power feeder 220a and the second high-frequency power feeder 220b.
- high frequency power is supplied to both ends of the surface wave transmission line 203.
- the supplied high frequency power is propagated near the surface by a surface wave or radiated from the vicinity of the surface from both ends of the surface wave transmission line 203 toward the center.
- the object to be heated 102 placed on the installation table 101 is heated.
- the configurations of the high-frequency power generation unit 210, the first high-frequency power supply unit 220a, and the second high-frequency power supply unit 220b are the configurations of the high-frequency power generation unit 110 and the high-frequency power supply unit 120 described in the first embodiment. Since it is the same, description is abbreviate
- the high-frequency heating device 200 of the second embodiment is configured and operates.
- FIG. 9 is a diagram illustrating an example of the shape of the surface acoustic wave transmission line 203 according to the second embodiment.
- the surface wave transmission line 203 has a fixed inclination angle 205a and 205b (for example, 10 °) with respect to the installation table 101 in the vicinity of the installation table 101 arranged in the horizontal state shown in FIG.
- a mountain shape For example, a mountain shape.
- a mountain shape having a fixed inclination angle 205a and inclination angle 205b with respect to the installation base 101. The shape is formed.
- the surface wave transmission line 203 includes a distance d201 between the surface wave transmission line 203 and the installation base 101 on the first high frequency power supply unit 220a side, and a second high frequency power supply unit 220b.
- the distance d202 between the surface acoustic wave transmission line 203 on the side and the installation table 101 is larger than the distance d203 between the apex portion 203a of the mountain-shaped surface wave transmission line 203 and the installation table 101 with respect to the installation table 101.
- the apex portion 203a of the surface wave transmission line 203 corresponds to the position farthest away from each of the first high-frequency power feeder 220a and the second high-frequency power feeder 220b.
- the high-frequency heating device 200 of the second embodiment transmits the high-frequency power generated by the high-frequency power generation unit 210 via each of the first high-frequency power supply unit 220a and the second high-frequency power supply unit 220b. And supplied from both ends of the surface wave transmission line 203. As a result, the object to be heated 102 installed on the installation table 101 disposed near the surface of the surface wave transmission line 203 is heated.
- the surface wave transmission line 203 has a distance d201 and a distance d202 between the vicinity of both ends of the surface wave transmission line 203 and the end portions 101a and 101b of the installation base 101, and the apex portion 203a of the surface wave transmission line 203 and the installation base 101. It is arrange
- the distance increases as the distance from the 101a and 101b sides increases.
- the object to be heated 102 is also provided. Can be heated uniformly.
- the installation base 101 is arranged so as to maintain a horizontal state. Therefore, it is possible to prevent the occurrence of problems such as the object to be heated 102 installed on the installation table 101 rolling and moving. As a result, it is possible to more reliably prevent the occurrence of heating unevenness due to the movement of the article to be heated 102.
- the high frequency power is supplied to the surface wave transmission line 203 from both ends of the surface wave transmission line 203. Therefore, the object to be heated 102 can be heated more uniformly with respect to the propagation direction of the high-frequency power in the surface wave transmission line 203.
- FIG. 10 is a diagram illustrating a heating operation of the article to be heated 102 by the surface wave transmission line 206 of a general high-frequency heating apparatus.
- FIG. 10 shows that when high-frequency power is supplied from both ends of the surface wave transmission line 206 in a state where the object to be heated 102 is placed on the installation base 101, the surface wave transmission line 206 propagates through the surface wave.
- the state of the electric field strength distribution 241 formed by the high-frequency power for heating the object to be heated 102 is shown by shading.
- high-frequency power is supplied to both ends of the surface wave transmission line 206 via the first high-frequency power supply unit 220a and the second high-frequency power supply unit 220b.
- the supplied high-frequency power propagates in the vicinity of the surface of the surface wave transmission line 206 by surface waves, and is absorbed by the object to be heated 102 from both ends of the object to be heated 102 via the installation table 101. Therefore, the high frequency power propagating through the surface wave transmission line 206 is absorbed as it passes through the object to be heated 102, and the electric field strength is attenuated. Thereby, an electric field strength distribution 241 as shown in FIG. 10 is formed.
- FIG. 11 is a diagram illustrating a heating operation of the article to be heated 102 by the surface wave transmission line 203 of the high-frequency heating device 200 of the second embodiment.
- FIG. 11 shows the heating operation of the object to be heated 102 in the following state.
- high-frequency power generated by the high-frequency power generator 210 is applied to both ends of the surface wave transmission line 203 formed in the chevron shape shown in FIG. 9, and the first high-frequency power feeder 220 a and the second Is supplied via each of the high-frequency power feeders 220b.
- the heated object 102 placed on the installation table 101 is heated by the electric field strength distribution 242 formed by the high-frequency power propagating through the surface wave transmission line 203 by the surface wave. Yes.
- the high frequency power supplied to both ends of the surface wave transmission line 203 via the first high frequency power supply unit 220 a and the second high frequency power supply unit 220 b Propagates near the surface with surface waves.
- the high frequency power is sequentially absorbed from both ends of the object to be heated 102. Therefore, the high-frequency power propagating through the surface wave transmission line 203 attenuates the electric field strength as it passes through the object to be heated 102. Thereby, an electric field intensity distribution 242 as shown in FIG. 11 is formed, and the object to be heated 102 on the installation base 101 is heated.
- both end sides of the object to be heated 102 placed on the installation base 101 are It is away from the vicinity of the surface of the surface wave transmission line 203.
- the high-frequency power passing through the installation table 101 decreases according to the distance, so that the object to be heated 102 on the installation table 101 is not heated strongly. That is, the attenuation of the high-frequency power propagating along the vicinity of the surface of the surface wave transmission line 203 is also reduced.
- the surface wave transmission line 203 is moved away from the first high frequency power feeding unit 220a and the second high frequency power feeding unit 220b arranged at both ends, and the object to be heated 102 and the surface wave transmission are directed toward the top part 203a.
- the distance to the track 203 is reduced.
- the high frequency power passing through the installation base 101 has a small distance from the surface wave transmission line 203. ,growing. That is, the degree of absorption of high-frequency power absorbed from the surface wave transmission line 203 to the object to be heated 102 via the installation table 101 is increased.
- a uniform electric field strength distribution 242 shown in FIG. 11 is formed on the installation table 101 with respect to the object to be heated 102 placed on the installation table 101.
- the object to be heated 102 can be heated uniformly with respect to the propagation direction of the high frequency power of the surface wave transmission line 203 while maintaining the installation table 101 in a horizontal state.
- a region of the surface wave transmission line 103 that contributes to heating of the object to be heated 102 is configured to be inclined in a mountain shape with respect to the propagation direction of the high-frequency power. May be. That is, at least the inclined region of the surface wave transmission line 203 is set so that the distance between the surface wave transmission line 203 and the installation base 101 becomes larger on the first high frequency power supply unit 220a and the second high frequency power supply unit 220b side. What is necessary is just to arrange
- a horizontal portion 207a and a surface wave transmission line 207 formed by combining the horizontal portion 207c and the inclined portion 207b shown in FIG. 12 may be used.
- the inclined portion 207b of the surface wave transmission line 207 is disposed so as to face the installation base 101 on which the object to be heated 102 is placed. Thereby, the same effect as Embodiment 2 can be acquired.
- the present invention is a high-frequency heating apparatus that heats an object to be heated installed on an installation table.
- the high-frequency heating device includes at least one surface wave transmission line provided in the vicinity of the installation table, at least one high-frequency power generation unit that generates high-frequency power, and directly supplies high-frequency power to the surface wave transmission line, One high-frequency power feeder is provided.
- the surface wave transmission line is configured to be installed inclined with respect to the propagation direction of the high frequency power so that the distance between the surface wave transmission line and the installation base becomes larger on the high frequency power feeding unit side.
- the distance between the installation table and the surface wave transmission line decreases as the distance from the high-frequency power supply side of the surface wave transmission line increases.
- the absorption of the high-frequency power propagating through the surface wave transmission line into the object to be heated increases as the distance from the side of the surface wave transmission line to which the high-frequency power is supplied is increased.
- the high-frequency power of the surface wave transmission line The object to be heated can be heated uniformly with respect to the propagation direction. Furthermore, since the installation table can be maintained in a horizontal state, it is possible to more reliably prevent the occurrence of problems such as the object to be heated installed on the installation table rolling.
- the high frequency heating cooker of the present invention has a high frequency power feeding portion disposed at both ends of the surface wave transmission line, and the surface wave transmission line is substantially at the apex of the intermediate portion with respect to the propagation direction of the high frequency power. It is good also as a structure with the mountain-shaped inclination which becomes a part.
- high frequency power can be supplied from both ends of the surface wave transmission line. Furthermore, without moving the installation table, the distance between the installation table and the surface wave transmission line can be reduced as the distance from the power supply side of the surface wave transmission line increases. As a result, even when a plurality of objects to be heated are installed side by side with respect to the propagation direction of the high-frequency power of the surface wave transmission line, or when a heated object having a large length is installed, the high-frequency power of the surface wave transmission line The object to be heated can be heated more uniformly with respect to the propagation direction. Furthermore, since the installation table can be maintained in a horizontal state, it is possible to prevent the occurrence of problems such as the object to be heated installed on the installation table rolling.
- the present invention can efficiently heat an object to be heated without heating unevenness in a high frequency heating apparatus that heats the object to be heated by a surface wave transmission line. Therefore, this invention is useful as cooking household appliances, such as a microwave heater.
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Abstract
Description
以下、実施の形態1に係る高周波加熱装置100について、図1を用いて説明する。
以下、実施の形態2に係る高周波加熱装置200について、図8を参照しながら、説明する。
101 設置台
101a,101b 端部
102 被加熱物
103,106,107,203,206,207 表面波伝送線路
104,204a,204b 伝送方向
105,205a,205b 傾斜角
107a,107c,207a,207c 水平部分
107b,207b 傾斜部分
110,210 高周波電力発生部
111 マグネトロン
120,220 高周波電力給電部
203a 頂点部
220a 第1の高周波電力給電部(高周波電力給電部)
220b 第2の高周波電力給電部(高周波電力給電部)
121 方形導波管
141,142,143,241,242 電界強度分布
d101,d102,d201,d202,d203 距離
Claims (3)
- 設置台に設置される被加熱物を加熱処理する高周波加熱装置であって、
前記設置台近傍に設けられる、少なくとも1つの表面波伝送線路と、
高周波電力を発生させる、少なくとも1つの高周波電力発生部と、
前記表面波伝送線路に高周波電力を直接に給電する、少なくとも1つの高周波電力給電部と、を備え、
前記表面波伝送線路は、前記表面波伝送線路と前記設置台との距離が、前記高周波電力給電部側において、大きくなるように、前記高周波電力の伝搬方向に対して、傾斜を持つように構成され、前記表面波伝送線路に設置される、
高周波加熱装置。 - 前記表面波伝送線路の両端に、前記高周波給電部を配設し、
前記表面波伝送線路は、前記高周波電力の伝搬方向に対して、実質的に、中間部が頂点部となるように山形の傾斜を持つように構成される、
請求項1に記載の高周波加熱装置。 - 前記表面波伝送線路の前記傾斜は、少なくとも前記設置台と対向する領域に配設される請求項1または請求項2のいずれか1項に記載の高周波加熱装置。
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CN201980003877.7A CN111034357B (zh) | 2018-03-22 | 2019-02-18 | 高频加热装置 |
EP19770268.1A EP3771290A4 (en) | 2018-03-22 | 2019-02-18 | RADIO FREQUENCY HEATING DEVICE |
JP2020507439A JP7249491B2 (ja) | 2018-03-22 | 2019-02-18 | 高周波加熱装置 |
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PCT/JP2019/005739 WO2019181318A1 (ja) | 2018-03-22 | 2019-02-18 | 高周波加熱装置 |
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EP (1) | EP3771290A4 (ja) |
JP (1) | JP7249491B2 (ja) |
CN (1) | CN111034357B (ja) |
WO (1) | WO2019181318A1 (ja) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51129952A (en) * | 1975-05-07 | 1976-11-11 | Matsushita Electric Ind Co Ltd | High frequency heater |
JPS5292148A (en) * | 1976-01-29 | 1977-08-03 | Nippon Electric Co | High frequency heater |
JPH08148270A (ja) * | 1994-11-21 | 1996-06-07 | Matsushita Electric Ind Co Ltd | 高周波加熱装置 |
JPH08166133A (ja) | 1994-12-12 | 1996-06-25 | New Japan Radio Co Ltd | 高周波解凍加熱装置 |
Family Cites Families (8)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS52155443A (en) * | 1976-06-18 | 1977-12-23 | Matsushita Electric Ind Co Ltd | High frequency heating equipment |
JPS54105351A (en) * | 1978-02-07 | 1979-08-18 | Toshiba Corp | Microwave heating device |
JPS5816667A (ja) * | 1981-07-20 | 1983-01-31 | Matsushita Electric Ind Co Ltd | 高周波加熱による解凍方法 |
JPS58148270U (ja) * | 1982-03-31 | 1983-10-05 | 日産ディーゼル工業株式会社 | デイ−ゼル機関の燃料噴射ノズル |
CN104186024A (zh) * | 2011-12-19 | 2014-12-03 | 松下电器产业株式会社 | 微波加热装置 |
JP2015162272A (ja) * | 2014-02-26 | 2015-09-07 | パナソニック株式会社 | マイクロ波処理装置 |
JPWO2018037696A1 (ja) * | 2016-08-22 | 2019-06-20 | パナソニックIpマネジメント株式会社 | 高周波加熱装置 |
JP2018032471A (ja) | 2016-08-22 | 2018-03-01 | パナソニックIpマネジメント株式会社 | 高周波加熱装置 |
-
2019
- 2019-02-18 JP JP2020507439A patent/JP7249491B2/ja active Active
- 2019-02-18 CN CN201980003877.7A patent/CN111034357B/zh active Active
- 2019-02-18 EP EP19770268.1A patent/EP3771290A4/en active Pending
- 2019-02-18 WO PCT/JP2019/005739 patent/WO2019181318A1/ja active Application Filing
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS51129952A (en) * | 1975-05-07 | 1976-11-11 | Matsushita Electric Ind Co Ltd | High frequency heater |
JPS5292148A (en) * | 1976-01-29 | 1977-08-03 | Nippon Electric Co | High frequency heater |
JPH08148270A (ja) * | 1994-11-21 | 1996-06-07 | Matsushita Electric Ind Co Ltd | 高周波加熱装置 |
JPH08166133A (ja) | 1994-12-12 | 1996-06-25 | New Japan Radio Co Ltd | 高周波解凍加熱装置 |
Also Published As
Publication number | Publication date |
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CN111034357B (zh) | 2022-03-04 |
JPWO2019181318A1 (ja) | 2021-03-11 |
JP7249491B2 (ja) | 2023-03-31 |
EP3771290A4 (en) | 2021-05-26 |
CN111034357A (zh) | 2020-04-17 |
EP3771290A1 (en) | 2021-01-27 |
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