WO2011118198A1 - 加熱装置および冷蔵庫 - Google Patents
加熱装置および冷蔵庫 Download PDFInfo
- Publication number
- WO2011118198A1 WO2011118198A1 PCT/JP2011/001668 JP2011001668W WO2011118198A1 WO 2011118198 A1 WO2011118198 A1 WO 2011118198A1 JP 2011001668 W JP2011001668 W JP 2011001668W WO 2011118198 A1 WO2011118198 A1 WO 2011118198A1
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- WIPO (PCT)
- Prior art keywords
- radio wave
- storage
- power
- frequency
- refrigerator
- 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
- H05B6/80—Apparatus for specific applications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D31/00—Other cooling or freezing apparatus
- F25D31/005—Combined cooling and heating devices
-
- 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
- H05B6/66—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
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/72—Radiators or antennas
-
- 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
- H05B6/76—Prevention of microwave leakage, e.g. door sealings
- H05B6/763—Microwave radiation seals for doors
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25D—REFRIGERATORS; COLD ROOMS; ICE-BOXES; COOLING OR FREEZING APPARATUS NOT OTHERWISE PROVIDED FOR
- F25D2400/00—General features of, or devices for refrigerators, cold rooms, ice-boxes, or for cooling or freezing apparatus not covered by any other subclass
- F25D2400/02—Refrigerators including a heater
-
- 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
- H05B2206/00—Aspects relating to heating by electric, magnetic, or electromagnetic fields covered by group H05B6/00
- H05B2206/04—Heating using microwaves
- H05B2206/044—Microwave heating devices provided with two or more magnetrons or microwave sources of other kind
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- 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
- This invention relates to the heating apparatus which can draw out a to-be-heated object from the inside of an apparatus main body out of a main body by pulling out an opening-and-closing door.
- the present invention also relates to a refrigerator including a refrigeration apparatus and a refrigeration apparatus.
- an impedance converter that is a radio wave transmission suppressor facing the inner wall surface of the storage space is provided to suppress the microwave supplied to the storage space for storing the object to be heated from propagating from the door.
- positioned at the opening-and-closing door is proposed (for example, refer patent document 2).
- FIG. 18 is a cross-sectional view of a refrigerator storage chamber according to a conventional embodiment.
- a refrigerator having a compressor and a heat exchanger is provided on the back side, and a high frequency of 47 MHz, for example, is generated on the other side by a high frequency oscillator.
- the antenna 2 is provided with a high-frequency heater for irradiating electromagnetic waves from the antenna 2 to the storage chamber 1.
- the frozen body is dielectrically heated using electromagnetic waves of any frequency of medium wave, short wave, and ultrashort wave, and cooled with energy larger than the energy absorbed by the object to be frozen by the dielectric heating, Some cells suppress the destruction by freezing the object to be frozen to break ice crystals on the surface of the object to be frozen (see, for example, Patent Document 4).
- the impedance conversion part of the electromagnetic wave transmission suppressing part of the conventional door of this type of drawer style is configured to face the flange surface of the opening edge of the storage space, and the opening / closing door faces the flange of the opening edge of the storage space.
- An opening / closing door having a large opposing area with respect to the opening area of the storage space is required.
- the configuration of the open / close door disclosed in Patent Document 2 is to make the impedance conversion portion of the radio wave transmission suppressing portion provided in the open / close door inwardly face the storage space, and the area of the open / close door facing the storage space is: It can be configured with a slightly larger facing area with respect to the opening area of the storage space, and has the advantage that the door can be made compact.
- the clearance where the four corners of the impedance conversion part of the radio wave transmission suppressing part provided on the open / close door face the inner wall of the storage space is such that the impedance conversion part on the four sides of the radio wave transmission suppression part faces the inner wall of the storage space. It is difficult to make the function of the radio wave transmission suppressing unit function effectively at the four corners of the storage space.
- This invention solves the said conventional subject, and aims at providing the heating apparatus which can make the function of a radio wave transmission suppression part act effectively over the perimeter of the opening end of storage space.
- a high-frequency power supply device is provided in an adjacent section of the storage room in the freezing temperature zone.
- wiring and the like can be simplified and made more efficient. It is illustrated.
- the high-frequency power supply device is provided on the back of the storage room in the freezing temperature zone, the high-frequency power supply device is cooled by heat conduction from the storage room in the freezing temperature zone, so that the high-frequency power supply device
- condensation may occur due to the difference, and there is a possibility that a malfunction such as a failure or malfunction due to condensation may occur.
- a second object of the present invention is to solve the above-described conventional problems, and to reduce the possibility that condensation occurs due to a temperature difference between the high-frequency power supply device and the surroundings, and to provide a highly reliable high-frequency supply device.
- a heating device of the present invention includes a housing that forms a storage space in which an object to be heated is stored, an open / close door provided at an opening end of the housing, A storage container that can be pulled out by an open / close door; and a radio wave transmission suppression unit that prevents leakage of radio waves from the storage space to the outside, wherein the radio wave transmission suppression unit has a longitudinal extension direction of the storage container. And a radio wave adjustment unit formed along the periphery of the opening end with a predetermined gap from the inner wall surface of the housing.
- the gap created by the impedance conversion part of the radio wave transmission suppressing part can be arranged almost equally over the entire circumference, and the drawer-style door
- the function of the radio wave transmission suppressing unit provided in the can be reliably operated over the entire circumference.
- the radio wave propagation direction suppressing plate can be configured to have a length that reaches the front end thereof sufficiently smaller than 1/4 of the transmission wavelength, and the compact can also configure an open / close door in the thickness direction.
- This open / close door has a compact area facing the inner wall surface of the storage space, and can be configured as a lightweight and compact open / close door.
- the heating device having such an open / close door can be practically deployed in a drawer portion of a kitchen system kitchen, or can be deployed integrally incorporated in another device such as a refrigerator or a vending machine.
- a refrigerator includes a plurality of storage rooms, a cooling device for cooling the plurality of storage rooms, and at least one storage room among the plurality of storage rooms.
- a radio wave generating means for generating a high frequency to be supplied to the radio wave, and a radio wave radiating means for receiving a high frequency power from the radio wave generating means to irradiate the plurality of storage chambers with a high frequency, wherein the plurality of storage chambers are frozen by the cooling device.
- a freezing room that is maintained in a temperature zone is provided, and the high-frequency power generated by the radio wave generating means is supplied to the radio wave radiating means via a waveguide device, and the radio wave generating means is stored in a place other than the freezing room. It is provided in the equipment storage section adjacent to the room.
- the high-frequency power supply device is cooled by heat conduction from the storage room in the freezing temperature zone, so that the possibility that condensation occurs due to the temperature difference between the high-frequency power supply device and the surroundings can be reduced.
- the radio wave transmission suppressing unit provided on the drawer-type opening / closing door (the front plate of the drawer) is opposed to the inner wall of the storage space for storing the object to be heated by a predetermined clearance relationship. It can be configured to exhibit its function over the entire circumference, and has an opening / closing door that is compact in area facing the opening area of the storage space and compact in the thickness direction, and has a large opening area with respect to the shape of the opening / closing door
- a storage space can be realized, which can be mounted on a drawer part of a kitchen system kitchen or can be integrally assembled and mounted on another device such as a refrigerator or a vending machine.
- the refrigerator of the present invention can reduce the possibility of dew condensation due to a temperature difference between the high-frequency power supply apparatus and the surrounding area, a refrigerator with high reliability can be provided.
- FIG. 1 is a cross-sectional configuration diagram of a heating apparatus according to Embodiment 1 of the present invention.
- 2 is a schematic perspective view of the storage space portion of FIG.
- FIG. 3 is a detailed configuration diagram of the radio wave transmission suppressing unit of FIG.
- FIG. 4 is a schematic configuration diagram relating to the microwave action of FIG.
- FIG. 5 is a schematic configuration diagram relating to the microwave action of the heating apparatus according to the second embodiment of the present invention.
- FIG. 6 is a diagram schematically showing the configuration of the impedance converter.
- FIG. 7 is a diagram schematically illustrating another configuration of the impedance converter.
- FIG. 8 is an external perspective view of a main part of a storage chamber of the food storage device according to Embodiment 3 of the present invention.
- FIG. 8 is an external perspective view of a main part of a storage chamber of the food storage device according to Embodiment 3 of the present invention.
- FIG. 8 is an external perspective view of a main part of a
- FIG. 9 is an external perspective view of a main part in the vicinity of a refrigerator storage room in Embodiment 3 of the present invention.
- FIG. 10 is a comparison diagram of the temperature rise of food in Embodiment 3 of the present invention with the prior art.
- FIG. 11 is a cross-sectional view of a main part of the antenna used for the refrigerator according to Embodiment 3 of the present invention.
- FIG. 12 is a cross-sectional view of the refrigerator in the third embodiment of the present invention.
- FIG. 13 is a block diagram of the radio wave generating means of the refrigerator in the third embodiment of the present invention.
- FIG. 14 is a block diagram including a stop device for the radio wave generating means of the refrigerator in the third embodiment of the present invention.
- FIG. 15 is a characteristic diagram showing the pre-search function of the refrigerator in the third embodiment of the present invention.
- FIG. 16 is an electric timing chart showing the principle of simultaneous use of the refrigerator in the third embodiment of the present invention.
- FIG. 17 is a longitudinal sectional view of a refrigerator using the refrigerator according to Embodiment 4 of the present invention.
- FIG. 18 is a cross-sectional view of a storage room of a conventional refrigerator.
- casing which forms the storage space in which a to-be-heated material is accommodated
- the opening-and-closing door provided in the opening end of the said housing
- a radio wave transmission suppressing unit that prevents leakage of radio waves from the storage space to the outside, and the radio wave transmission suppressing unit is formed such that a direction in which the storage container is pulled out is long, and an inner wall surface of the housing And a radio wave adjustment unit formed along the periphery of the opening end with a predetermined gap.
- the opening / closing door has a compact area that faces and contacts the inner wall surface of the storage space, and it is possible to form the outer periphery of the housing with a small area after taking a large area of the opening.
- the aesthetics are good, and the overall door structure can be light and compact.
- Such a heating device having an open / close door can be practically deployed in a drawer part of a kitchen system kitchen, or can be deployed integrally with other equipment such as a refrigerator or a vending machine.
- the second invention is characterized in that the radio wave adjusting portion is formed by a gap formed with a constant cross-sectional area.
- the third invention is characterized in that the radio wave transmission suppressing unit includes an impedance conversion unit which is a space having an opening communicating with the radio wave adjusting unit.
- radio waves that have been adjusted in the transmission direction by passing radio waves through almost the same gap around the entire circumference of the radio wave adjustment section created by the inner wall surface of the housing facing the open / close door are provided from the opening to the open / close door side.
- by forming a large resistance in the opening it is possible to suppress the flow of high-frequency current trying to pass through the opening and more reliably prevent the transmission of radio waves. It becomes possible.
- the fourth aspect of the invention is characterized in that the radio wave transmission suppressing portion is formed such that the storage container is pulled out in the longitudinal direction.
- the radio wave transmission suppressing unit can reliably maintain its function even when the opening / closing door is being pulled out as long as the opening does not deviate from the position facing the inner wall surface of the housing. It is possible to prevent transmission of radio waves.
- the fifth aspect of the invention is characterized in that the impedance conversion section of the radio wave transmission suppressing section has an internal space cross section that is largest on the inner side of the storage space and smallest on the door side.
- the radio wave propagation direction suppression plate can be configured to have a length that reaches the front end thereof sufficiently smaller than 1 ⁇ 4 of the transmission wavelength, and the compact can also configure an open / close door in the thickness direction.
- the sixth invention is characterized in that the opening end has an elliptical shape.
- the inner wall surface of the storage space has no corner part, and the gap created by the radio wave transmission suppressing part can be arranged almost equally over the entire circumference.
- the function of the radio wave transmission suppressing portion provided in the style opening / closing door can be reliably acted over the entire circumference.
- the 7th invention is equipped with the storage space in which a to-be-heated material is accommodated, and the opening-and-closing door which is provided in the end of the said storage space, and withdraws / inserts a to-be-heated material to the said storage space by a drawer
- the end has an elliptical shape, and the radio wave transmission suppressing portion provided in the opening and closing door is configured to face the entire inner surface of the storage space with a predetermined gap, and the radio wave transmission suppressing portion has been subjected to drawing processing in a plurality of stages.
- a base and a radio wave propagation direction restraining plate that is disposed on the outer peripheral edge of the base at a predetermined interval with respect to the base and periodically arranges slits.
- the characteristic impedance value formed by the step on the root side of the radio wave propagation direction suppression plate facing the base of the multi-step structure is more than the characteristic impedance formed by the step on the tip side
- the wave propagation direction suppression plate can be configured with a length that is sufficiently smaller than 1/4 of the transmission wavelength by the impedance conversion effect by increasing the size, and the compact can also configure the open / close door in the thickness direction. .
- This open / close door has a compact area facing the inner wall surface of the storage space, and can be configured as a lightweight and compact open / close door.
- a heating device having an open / close door can be deployed practically in a drawer part of a kitchen system kitchen, or can be integrated into other equipment such as a refrigerator or a vending machine serving as a food storage device.
- the drawer-style opening / closing door has a structure in which a supporting means for holding a storage container on which an object to be heated is placed is connected to the opening / closing door, defines a movable region of the supporting means, and the storage space.
- Holding rail means supported by the inner left and right wall surfaces. The holding rail regulates the vertical fluctuation of the supporting means, and the door can be pulled out largely.
- radio wave generating means for supplying microwaves to the storage space, and the radio wave radiation means for radiating microwaves into the storage space is opposed to the center of the area defining the storage position of the object to be heated.
- the radio wave generation means includes a power detection unit that detects at least the microwave reflected power in the microwave supply power supplied to the storage space and the microwave reflected power reflected from the storage space, and the microwave reflection It has a control unit that regulates the operating frequency of the radio wave generating means based on a power signal, and heats the frequency with the minimum microwave reflected power obtained by sweeping the frequency in a prescribed band at the beginning of heating.
- the power generated by the radio wave generating means can be supplied to the object to be heated most efficiently. With this function, it is possible to use radio wave generating means with reduced generated power, and promote a compact configuration of the entire heating device.
- the eleventh invention includes a coaxial transmission line that transmits the output of the radio wave generating means to the radio wave radiating means, and uses the transmission loss amount of the coaxial transmission line to reflect the microwave power amount reflected to the radio wave generating means. Can be reduced, heat generation of the radio wave generating means can be suppressed, and reliable performance can be ensured. In some cases, it is possible to omit an isolator, which is a commonly used anti-reflection component.
- the radio wave radiation means has a patch antenna configuration, and an antenna can be disposed very close to the inner wall surface of the storage space, so that a large free space in the storage space can be taken.
- the radio wave radiating means is configured to radiate circularly polarized waves.
- the radio wave generating means By supplying two outputs of the radio wave generating means with a phase difference of 90 degrees to one antenna, circularly polarized wave radiation is achieved. Can be realized.
- the space occupied by the antenna storage space may be substantially the same as the patch antenna configuration, and the circularly polarized light is directly incident on the object to be heated, so that heating of the object to be heated can be promoted and It is possible to further reduce the amount of microwave energy propagating through.
- the fourteenth invention is a refrigerator characterized by comprising a cooling means for cooling the storage space and a cold air sealing member for suppressing heat exchange between the storage space and the external space.
- the fifteenth aspect of the invention is characterized in that the cold air sealing member is provided in the open / close door on the outer peripheral side of the radio wave transmission suppressing portion.
- the cool air sealing member when the door is closed, the cool air sealing member can be reliably brought into contact with the periphery of the opening end of the storage space, and the cool air discharge can be suppressed.
- the cool air sealing member since the cool air sealing member is separated from the radio wave transmission suppressing unit, it is possible to provide a refrigerator that reliably prevents radio wave leakage.
- a sixteenth aspect of the present invention is the refrigerator characterized in that the seal member is provided closer to the door than the radio wave transmission suppressing portion.
- the cold air seal member As a result, radio waves are suppressed in front of the cold air seal member, so that the cold air seal member does not act on radio waves, and the cold air seal member can be formed of a general-purpose material.
- the cold air seal member can be formed of a general-purpose material.
- a plurality of storage chambers a cooling device for cooling the plurality of storage chambers, radio wave generating means for generating a high frequency to be supplied to at least one of the plurality of storage chambers, and the radio wave Radio wave radiating means for receiving high frequency power from the generating means and irradiating the plurality of storage chambers with high frequency, the plurality of storage chambers having a freezing chamber maintained in a freezing temperature zone by the cooling device,
- the high frequency power generated by the generating means is supplied to the radio wave radiating means via a waveguide device, and the radio wave generating means is provided in a device storage section adjacent to a storage room other than the freezer compartment. It is a refrigerator.
- the high-frequency power supply device is cooled by heat conduction from the storage room in the freezing temperature zone, so that the high-frequency power supply device can reduce the possibility of dew condensation due to a temperature difference from the surroundings, and has high reliability. Can be provided.
- the uppermost storage chamber of the plurality of storage chambers is a refrigeration chamber maintained in a refrigeration temperature zone
- the radio wave radiating means is provided in a freezer compartment
- the radio wave generating means is the refrigeration chamber.
- the high frequency power generated by the radio wave generating means is supplied to the radio wave radiating means via a waveguide device.
- the high frequency power feeding device is cooled by heat conduction from the storage room in the freezing temperature zone, so that condensation occurs due to the temperature difference between the high frequency power feeding device and the surroundings.
- the possibility of dew condensation in the high-frequency power supply device due to the temperature difference from the surroundings can be reduced by providing it in the adjacent compartment of the refrigerating room, which is about 20 to 30 degrees higher than the freezing room temperature range.
- a refrigerator with high reliability can be provided.
- radio wave radiation means for receiving high frequency power from the radio wave generation means provided in the equipment storage section and irradiating the storage room with microwaves is provided in the plurality of storage rooms, and from the radio wave generation means.
- a plurality of waveguide devices that transmit high-frequency power to the radio wave radiation means of each of the plurality of storage chambers are provided.
- microwave power can be supplied to multiple storage rooms at the same time, and high-quality freezing, high-quality thawing, and high-quality thawing of multiple foods can be performed simultaneously in multiple storage rooms. Convenience, convenience, and time saving can be significantly improved.
- the radio wave radiation means is an antenna, and the antenna has a flat plate shape and is provided above the storage chamber.
- the antenna on the thin substrate can be arranged on the wall surface of the storage room, and the high frequency supplied from the waveguide device can be evenly applied to the storage room. Even if it exists, the temperature distribution of the foodstuff accommodated in the storage room can be made more uniform.
- the antenna is configured such that a flat plate made of a material forming a printed circuit board such as a resin is covered with a metal coating made of a metal film or a metal foil, and high frequency power is supplied from the waveguide means to the metal coating. It is made of a microstrip substrate, and the other side is fixedly installed on either side of the food storage room, so that the antenna on the thin substrate can be placed on the wall of the storage room.
- the user-friendliness and convenience of the user can be remarkably improved without the antenna structure becoming obstructive and difficult to store.
- the radio wave generating means includes at least two transmitters, a driver composed of at least one amplifier, a distributor for distributing the output, and microwave power distributed by the distributor.
- the directional coupler for detecting the directional coupler, the antenna disposed in the subsequent stage of the directional coupler, and the control unit for feeding back the signal of the directional coupler and controlling the transmitting unit can be realized by one radio wave generating means. It will be possible to irradiate multiple storage chambers with microwaves, and freeze high-quality foods, or high-quality freezing and high-quality solutions. And user experience can be performed simultaneously their processes in a plurality of storage rooms, convenience can be improved significantly saving time property.
- At least two or more microwave powers distributed by the distributor are appropriately assigned to a plurality of storage rooms, so that food processing (freezing, thawing, etc.) is performed on the plurality of storage rooms.
- a suitable number of antennas can be allocated according to the specifications, and the number of antenna distributions can be allocated to the appropriate storage room according to the equipment specifications, so that the optimum microwave output distribution can be achieved with respect to the specifications.
- the transmitter has a function of changing the frequency by a frequency variable signal from the control unit.
- the entire region or specific region within the frequency band allowed as the radio wave generating means before the dielectric heating is performed.
- dielectric heating is performed. Because the food can be irradiated with microwaves, the heat receiving efficiency of the food is remarkably improved, the thawing can be completed in a shorter time, and the loss itself can be reduced, so waste heat treatment using heat radiation fins etc. is very simple Since the entire system can be reduced in size, it is advantageous in terms of economy.
- the transmitter has a function of changing the frequency by a frequency variable signal from the controller.
- the entire region or a specific region within the frequency band allowed as the radio wave generating means is obtained before performing the dielectric heating.
- the minimum reflected frequency is detected without detecting the incident wave, and a simpler system
- the operating frequency can be determined.
- the control unit performs dielectric heating to a plurality of storage rooms by dividing the time axis, and when a microwave power is irradiated to a certain storage room, the reflected power level fed back to the control unit is minimized. If the frequency is selected and then dielectric heating is performed, and other storage chambers are heated according to the division rule of the time axis built in the control unit, the frequency sweep is performed again to minimize the reflected power level.
- a configuration that changes the cooling rate or heating rate of food from the proportion of time that each storage chamber is dielectrically heated after selecting the frequency to select the frequency that minimizes the reflected power level and re-selecting the frequency.
- the radio wave generating means can irradiate a plurality of storage rooms with microwave power by duty control while using a single object, and the single radio wave generating means can be used for a plurality of storage rooms. Because the wood can microwave irradiation treatment, excellent economical efficiency, it is possible to provide convenience and excellent equipment.
- ON / OFF of microwave irradiation to a plurality of storage rooms is configured by an operation selection switch that supplies or cuts off drain power to the final amplifier, and is thus irradiated from each antenna with a simple configuration. This makes it possible to turn on / off microwave power and provide an apparatus with excellent economic efficiency.
- FIG. 1 is a cross-sectional configuration diagram of the heating device of the present invention
- FIG. 2 is a schematic perspective view of a storage space portion of the heating device of the present invention
- FIG. 3 is a cross-sectional perspective view of the open / close door of FIG. It is a block diagram of a generation
- the heating device 10 includes a storage space 11 formed of a casing 10 a made of a metal material that confines a microwave to be supplied, and an opening of the storage space 11 in a drawer manner with respect to the storage space 11.
- the open / close door 12 that opens and closes the end, the radio wave generation means 13 that generates microwaves, the radio wave radiation means 14 that radiates microwaves into the storage space 11, and the microwaves generated by the radio wave generation means 13 are transmitted to the radio wave radiation means 14.
- a coaxial transmission line 15, a drive power supply 16 for the radio wave generation means 13, a power detection unit 17 disposed on the output side in the radio wave generation means 13, a radio wave generation means 13 and a control unit 18 for controlling the operation of the drive power supply 16 are provided. .
- the radio wave transmission suppressing part 19 provided in the opening / closing door 12 is provided at a position facing the inner wall surface of the storage space 11, that is, a position where the opening end of the housing 10a can be opened and closed.
- the wall surface of the storage space 11 in which the open / close door 12 is inscribed has an elliptical cross-sectional configuration.
- the open / close door 12 has a radio wave adjusting unit 19 a that is a gap existing between the radio wave transmission suppressing unit 19 and the inner wall surface of the housing 10 a that forms the storage space 11.
- the radio wave adjusting unit 19a is provided along the periphery of the opening end of the housing 10a.
- the radio wave adjusting unit 19a is formed so that the direction in which the storage container 20 is pulled out is long.
- a cross-sectional shape cut along a plane including the pull-out direction and the vertical direction of the radio wave adjustment unit 19a which is a space surrounded by the open / close door 12, the cover 32, and the radio wave propagation direction suppression plate 31. (The cross-sectional shape shown in FIG. 1) has the longest pull-out direction. Thereby, the transmission direction of the radio wave incident on the radio wave adjusting unit 19a from the inside of the housing 10a is adjusted to a fixed direction.
- the radio wave adjusting unit 19a is provided so as to be substantially equidistant over the entire circumference when viewed from the drawing direction.
- the radio wave adjustment unit 19a is formed so as to be substantially equidistant over the entire circumference, in other words, the radio wave adjustment unit 19a is formed by a gap formed with a constant cross-sectional area. It is.
- the radio wave transmission suppressing unit 19 includes an impedance conversion unit having an opening 19b communicating with the radio wave adjusting unit 19a.
- an impedance conversion unit having an opening 19b communicating with the radio wave adjusting unit 19a.
- the opening / closing door 12 has a supporting means 21 made of a metal material for supporting the left and right and back sides of the bottom from the lower side of the storage container 20 for storing and placing the object to be heated 44 (only the right side of the two left and right is shown in FIG. 1). ) Is provided.
- One end of the support means 21 is connected and fixed to the open / close door 12 by screw assembly.
- the radio wave transmission suppressing portion 19 is also assembled to the open / close door 12 at the same time.
- the support means 21 is fixed to the main body made of a resin material for the door 12.
- the other end side of the support means 21 is fixed to the two support means 21 in a bridging manner at a predetermined interval by a connecting portion 22 made of a resin material.
- a roller 23 for smoothly moving the opening / closing door 12 is attached to the support means 21 before the connecting portion 22 of the support means 21.
- holding rail means 24 supported and fixed to the left and right inner wall surfaces of the housing 10a forming the storage space 11 is provided.
- the roller 23 of the support means 21 is fitted and assembled to the rail portion provided in the holding rail means 24.
- the rail portion of the holding rail means 24 inclines the back side of the storage space 11 downward, and the roller 23 descends along the inclined surface 24a so that the open / close door 12 forms the storage space 11 of the housing 10a. It is fixedly supported on the opening side.
- a roller movement stop portion 25 is provided on which the roller 23 is stopped and fixed when the door 12 is opened. Further, a projecting portion 26 that penetrates the inner wall surface of the housing 10 a that forms the storage space 11 from the connecting portion 22 is provided. A switch 27 for detecting that the opening / closing door 12 is closed is provided by the tip of the protruding portion 26.
- the impedance conversion unit of the radio wave transmission suppressing unit 19 provided in the open / close door 12 includes a base 30 made of a metal material that has been subjected to drawing processing in a plurality of stages, and a predetermined interval with respect to the base 30 on the outer peripheral edge of the base 30. And a radio wave propagation direction suppressing plate 31 having slits arranged periodically. As shown in FIG. 3, the radio wave propagation direction suppression plate 31 is separated by a slit, and substantially T-shaped plate surfaces 31 a, 31 b, 31 c, and 31 d are periodically arranged.
- a cover 32 made of a low dielectric loss dielectric material is disposed on the outer peripheral edge of the radio wave propagation direction suppressing plate 31 so that foreign matter does not enter the radio wave transmission suppressing portion 19. That is, the cover 32 is provided for preventing foreign matter from entering the radio wave transmission suppressing unit 19 and is not an essential component of the radio wave transmission suppressing unit 19.
- the radio wave propagation direction suppression plate 31 is assembled so as to cover the base 30, and the cover 32 covers the periphery of the radio wave propagation direction suppression plate 31.
- the base 30 and the radio wave propagation direction suppressing plate 31 are simultaneously assembled and fixed to the resin body 34 of the door 12 together with the support means 21 through the assembly hole 33 by screws.
- the radio wave generating means 13 includes an oscillator 41, two-stage amplifiers 42 and 43 that amplify the output of the oscillator 41, and the power detection unit 17.
- the transmitter 41 is a transmitter that generates microwaves.
- the output of the radio wave generating means 13 is transmitted to the radio wave radiating means 14 via the coaxial transmission line 15 and supplied to the object to be heated 44 stored in the storage space 11.
- the radio wave radiating means 14 has a so-called patch antenna configuration using an air layer so that the object to be heated 44 is placed in the storage container 20 at the center in the left-right direction of the storage space 11. It is arranged at the center of the area designated by The radio wave radiation means 14 is disposed on the upper wall surface side of the storage space 11 and is disposed so as to face a region where the object to be heated 44 is placed.
- the radio wave radiation means 14 is surrounded by an antenna cover 45 made of a low dielectric loss material.
- the object to be heated 44 opens the opening / closing door 12 and is placed in a designated area of the storage container 20, and is stored inside the housing 10 a by closing the opening / closing door 12. In this closing operation, the projecting portion 26 closes the contact of the switch 27, and power is supplied to the control unit 18.
- the control unit 18 starts the operation of the radio wave generation unit 13 by operating the drive power supply 16 by receiving the heating condition and the heating start command of the object to be heated 44 input from the operation unit (not shown).
- the power detection unit 17 disposed on the output side in the radio wave generation means 13 reflects the microwave supply power supplied to the storage space 11 side and the radio wave generation means 13 side from the storage space 11 (reflects to the casing 10a). ) Detect the reflected microwave power.
- the control unit 18 sweeps the frequency of the output frequency of the radio wave generation means 13 over a predetermined band before the main heating of the object to be heated, and takes in a signal corresponding to the microwave reflected power at each frequency from the power detection unit 17.
- the frequency at which the microwave reflected power exhibits the minimum is extracted, and the frequency is set in the radio wave generating means 13 as the heating frequency.
- the microwave of the set frequency is generated and the main heating of a to-be-heated material is started with the microwave output applicable to the input heating conditions.
- the microwave output is controlled so as to satisfy a predetermined heating condition.
- desired conditions temperature, heating time, etc.
- the operation of the radio wave generating means 13 is stopped and the heating is finished.
- the shape of the opening end of the housing 10a forming the storage space 11 is a smooth ring without sharp parts, for example, an elliptical shape, an oval shape, or a rectangle with rounded corners. Therefore, the clearance created by the radio wave transmission suppressing portion 19 and the opening end of the housing 10a can be made to have a substantially equivalent shape without a specific shape over the entire circumference of the opening end. Therefore, the function of the radio wave transmission suppressing unit 19 provided on the drawer-style door 12 can be reliably operated over the entire circumference of the radio wave transmission suppressing unit 19.
- an infinite impedance space is formed in the gap between the tip 19 a of the radio wave propagation direction suppressing plate 31 and the base 30.
- the configuration of the impedance conversion unit of the radio wave transmission suppressing unit 19 will be described with reference to FIG.
- the impedance conversion unit of the radio wave transmission suppressing unit 19 is an opening 19b (indicated by 19a in the case of FIG. 6) serving as an entrance for radio waves.
- the radio wave adjusting unit 19a that communicates with the impedance converting unit has two different dimensions of H1 and H2 as the size of the gap with the radio wave propagation direction suppressing plate 31.
- two different dimensions of the radio wave adjusting unit 19a which is a space, are formed by subjecting the base 30 to two-stage drawing.
- the radio wave propagation direction suppression plate 31 includes substantially T-shaped plate surfaces 31a, 31b, 31c, 31d,... Periodically arranged at intervals of the pitch P1.
- This substantially T-shaped plate surface forms width dimensions W1, W2 and length dimensions L1, L2 as the structure of the regions of the substantially opposite plate surfaces that form the base 30 and the gap dimensions H1, H2, respectively. ing.
- a region corresponding to the length L0 of the radio wave propagation direction suppression plate 31 located at the base 19c of the impedance conversion unit of the radio wave transmission suppression unit 19 is not provided with a slit.
- a continuous plate surface is used to ensure the mechanical strength of the radio wave propagation direction suppressing plate 31.
- Root 19c The gap H2 formed by the step on the tip side and the plate surface by the characteristic impedance value determined based on the gap H1 and the plate surface width W formed by the step on the side shown by 19b in the case of FIG.
- the radio wave propagation direction suppression plate 31 is sufficiently longer than 1 ⁇ 4 of the transmission wavelength by the impedance conversion action by making it larger than the characteristic impedance value determined based on the width W (about twice as a guideline). Can be configured with a small length.
- the inner space cross section is the largest on the inner side of the storage space after the storage container is drawn out in the longitudinal direction. It is set as the structure changed in multiple steps so that the door side may become the smallest.
- the radio wave propagation direction suppression plate 31 is separated by a slit and has a substantially T-shaped plate surface 31a, 31b, 31c, which has different plate surface widths W1 and W2.
- the relationship between the formed gap H2 and the characteristic impedance value determined based on the plate surface width W2 can be further increased, and the length to the tip of the radio wave propagation direction suppressing plate 31 can be made sufficiently more than 1/4 of the transmission wavelength.
- the thickness of the portion inscribed in the storage space 11 of the opening / closing door 12 can be made compact, and as a result, the weight reduction and the compact shape of the opening / closing door 12 can be achieved.
- FIG. 7 shows a schematic configuration of the impedance conversion unit of the radio wave transmission suppressing unit 119 in which the base 130 is drawn by three stages.
- the plate surfaces 131a, 131b, 131c,... Periodically arranged at the pitch P11 of the radio wave propagation direction suppressing plate 131 are widths corresponding to the respective steps (gap H11, H12, H13) of the base 130.
- Dimensions W11, W12, W13 and length dimensions L11, L12, L13 can be formed.
- the microwave radiation antenna 14 is a patch antenna using an air layer. Thereby, the space which the microwave radiation antenna 14 occupies in the storage space 11 can be made as small as possible. Further, the coaxial transmission line 15 connecting the radio wave generating means 13 and the microwave radiation antenna 14 utilizes the transmission loss amount so that the microwave supply power supplied to the storage space 11 is reflected 100%. However, the amount of microwave power returned to the radio wave generation means 13 can be made less than the specified value.
- the reflected microwave power received by the radio wave generation unit 13 is about 50% of the output power with respect to the output power of the radio wave generation unit 13.
- a protection component such as an isolator that can protect the micro generating means 13 from the reflected power can be eliminated, and the radio wave generating means 13 can be configured in a compact manner.
- the movable region of the support means 21 is defined by the rail portion provided in the holding rail means 24, and the holding rail defines the vertical fluctuation of the support means 21, so that the opening / closing door 12 can be pulled out greatly.
- the radio wave radiating means 14 for radiating microwaves into the storage space 11 is positioned opposite to the center of the region defining the storage position of the object to be heated, so that the microwave is directly incident on the object to be heated, The loss in the heated object is increased, the energy amount of the microwave propagating through the entire storage space 11 is reduced, and unnecessary in the storage container 20, the support means 21 or the holding rail means 24 stored in the storage space 11 Heat generation and spark generation can be suppressed.
- the radio wave radiation means 51 has two feeding points orthogonal to each other, and the phase difference of the microwaves supplied to each feeding point is 90 degrees.
- the radio wave generating means 52 includes an oscillator 53, two-stage amplifiers 54 and 55 for amplifying the output of the oscillator 53, an isolator 56 provided at the output of the amplifier 55, and a power detection provided at the output of the isolator 56. 57, a power distributor 58 that divides the output of the power detector 57 into two and forms a phase difference of 90 degrees, and transmission paths 59a and 59b that connect the output of the power distributor 58 and the radio wave radiation means 51 at a very short distance. Consists of.
- control part 60 which takes in each signal of the microwave supply power supplied to the storage space 11 side which the electric power detector 57 detects, and the microwave reflected power reflected from the storage space 11 to the isolator 56 side is provided.
- the microwave reflected power is combined by the power distributor 58 for the amount of microwave reflected and transmitted through the transmission paths 59a and 59b.
- Control unit 60 controls the generated frequency and output power of radio wave generating means 52.
- the control method is the same as that described in the first embodiment, and a description thereof will be omitted.
- the radio wave radiation means 51 that radiates circularly polarized waves uses an air layer as in the first embodiment, and is a circular plate.
- Two feeding points are provided at a point away from the center of the circular plate by a predetermined distance.
- a straight line connecting each feeding point and the center of the circular plate is orthogonal.
- the radio wave radiating means 51 is configured to radiate circularly polarized waves
- the occupied space in the antenna storage space 11 may be substantially the same as the patch antenna configuration shown in the first embodiment.
- a large free space in the storage space 11 can be taken.
- circularly polarized light to directly enter the object to be heated from a position facing the object to be heated, heating of the object to be heated can be promoted and the amount of microwave energy propagating in the storage space 11 can be further reduced. Since it can do, the heat_generation
- the transmission paths 59a and 59b are extremely short.
- the radio wave generating means 52 itself is mounted on the arrangement wall surface of the microwave radiation antenna 51. Is desirable. Therefore, since the coaxial transmission line is not used, the radio wave generating means 52 is provided with an isolator 56 that absorbs the microwave reflected power reflected from the storage space 11 by heat loss.
- the switch for detecting the closed state of the opening / closing door 12 is provided at the back of the storage space 11, it can also be provided at the front surface of the storage space 11.
- the microwave radiation antennas 14 and 51 are not limited to the arrangement of the upper wall surface of the storage space 11, and a plurality of microwave radiation antennas can be arranged.
- FIG. 8 is a perspective view of a main part of a refrigerator storage chamber according to Embodiment 3 of the present invention.
- the first storage chamber 4, the second storage chamber 5, and the drawer door 3 provided on the front side of the first storage chamber 4 and the second storage chamber 5 are provided in the main body of the food storage chamber. When food is taken in and out, it is provided so that it can be opened and closed.
- the second antenna 7 arranged on the top surface of the second storage chamber supplies a microwave to the second antenna 7 which is a radio wave radiating means through a coaxial cable which is the second waveguide means 11. Microwaves, which are high-frequency waves radiated from antennas serving as radio wave radiating means, dielectrically heat food.
- FIG. 9 is a perspective view of a main part of a storage room of another refrigerator according to Embodiment 3 of the present invention.
- the 1st storage room 4 with which the main part of the food storage room was equipped, and the 2nd storage room 5 are arranged so that it can be opened and closed separately.
- a first drawer door portion 8 of the right first storage chamber 4 and a second drawer door portion 9 of the left second storage chamber 5 are provided on the front side of each storage chamber.
- the first antenna 6 disposed on the top surface of the first storage chamber 4 supplies microwaves to the antenna 6 through a coaxial cable which is the first waveguide means 10.
- the second antenna 7 disposed on the top surface of the second storage chamber supplies microwaves to the antenna 7 through a coaxial cable that is the second waveguide means 11.
- the microwaves irradiated from different antennas in different storage rooms dielectrically heat the food.
- the food is irradiated with microwaves to cause dielectric heating, and the cooling rate of the food is slowed down. That is, by slowly cooling while maintaining the cooling capacity> heating capacity, the food does not freeze even when it is below the freezing temperature, so-called supercooled state (see thick line beef (development example) in FIG. 9). . After that, the food is ready for rapid purification of ice crystals, raising the temperature to near the freezing temperature at once, and releasing supercooling. After the food has returned to the freezing temperature, the microwave irradiation is stopped, the product is cooled to around ⁇ 20 ° C. and stored in a completely frozen state. When food is frozen through supercooling, the ice crystals are small in size and the cells are difficult to destroy, so that high quality freezing such as a small amount of drip is possible.
- cooling capacity> heating capacity can be regarded as the relationship of temperature decrease rate> temperature increase rate.
- the first storage chamber on the right side is supercooled and frozen (see FIG. 8), while the second storage chamber on the right side has a relatively short period of time even if it does not reach the microwave oven by thawing with microwaves. Compared to the workmanship of the range, it is possible to achieve a very high-quality thawing and to create a new life scene.
- FIG. 11 shows a cross-sectional view of the main part of the antenna according to Embodiment 3 of the present invention.
- the basic configuration of the antenna is a circular microstrip antenna, and the simplest configuration is a 14-metal coating with one side of a glass epoxy substrate being a solid land.
- a hole for passing the coaxial cable 15 is formed in the metal housing 12 and the dielectric substrate 13 serving as a dielectric.
- the dielectric substrate 13 is adhered and fixed to the metal housing 12, and the coaxial cable 15 is penetrated through the drilled hole, and the core wire 16 of the coaxial cable 15 is soldered to the metal coating 14.
- the antenna functions as an antenna when attached to the wall surface of the storage room.
- the dielectric constant of the material of the dielectric substrate is too large, dielectric loss occurs there, so there is no reason to use any substrate material. It is necessary to select an appropriate resin material. Since the thin substrate is attached to the wall in this way, it does not become a factor that hinders food in and out. It is desirable to further provide a protective coating or protective cover on the antenna surface.
- FIG. 12 shows a cross-sectional view from the side of the refrigerator according to Embodiment 3 of the present invention.
- a compressor 19 and a cooler 18 constituting a refrigeration cycle are arranged on the back side of the first storage chamber 4, and a fan 28 for blowing cool air cooled by the cooler 18 into the storage case 20.
- a micro lattice plate 23 made of a metal punching metal or the like is disposed in the middle of the cooling air flow path. The micro lattice plate 23 cools the food by causing the cool air carried by the fan 28 to flow into the storage case 20 through the micro lattice plate 23 and the microwave radiated from the first antenna 6 The cooler 18 is blocked from propagating to the back side.
- the conductive packing 22 is disposed over the entire periphery of the opening end surface of the first storage chamber 4 at the contact portion between the opening end surface of the first storage chamber 4 and the door 24.
- the conductive packing 22 has an effect of sealing the first storage chamber 4 and the second storage chamber 5 and the door 24 both spatially and electrically, and has both cold air leakage and microwave leakage. It is to prevent.
- a power generation unit 25 and a power supply unit 26 for supplying a DC voltage to the radio wave generation unit are arranged in a device storage section 27a which is a back space adjacent to the storage chamber 27 held in a refrigerated temperature zone among the storage chambers. .
- Microwaves are generated from the first antennas 6 and 7 disposed on the top surface of the first storage chamber 4 by the first waveguide unit 10 including the coaxial cable from the radio wave generation unit 25 and the second waveguide unit 11. Is irradiated to the food 21.
- the power supply unit 26 includes a converter circuit that insulates commercial power and performs AC-DC conversion.
- the power supply unit 26 that supplies a DC voltage to the radio wave generation means may be directly supplied from a DC power supply from a storage battery that is charged by solar power generation or the like installed in the home used.
- a converter circuit for AC-DC conversion becomes unnecessary, and a DC voltage can be directly supplied to a load.
- a DC voltage is obtained by converting a pulsating waveform obtained by converting an AC power supply into a single direction with a large capacitive capacitor to create a complete DC voltage using a smoothing circuit.
- the rotor of the motor is driven to rotate by switching it with an inverter circuit and supplying AC power to the DC brushless motor to create a rotating magnetic field.
- the current flowing through the power supply becomes a so-called capacitor input waveform, and the current flows near the peak of the AC power supply, and the current does not flow around other low-voltage peripheral parts.
- a waveform flows in the power supply system, current concentrates only near the peak of the power supply waveform, so a voltage drop occurs due to the internal impedance of the power supply system, reducing the voltage near the peak of the power supply, Originally, a sine wave voltage that does not include harmonics should be supplied from the power supply system, but a distorted waveform in which the voltage is depressed at the peak portion of the waveform is supplied.
- FIG. 13 shows a block diagram of the radio wave generating means in Embodiment 3 of the present invention.
- the radio wave generating means 25 includes a transmitter 29, a first pre-driver 30, a second pre-driver 31, a driver 32 that combines these two pre-drivers, and a distributor 33.
- the transmitter 29 is a transmitter configured by a PLL (phase lock loop) that transmits a weak source transmission signal of about 0 dBm.
- the transmission frequency is 2.4 GHz to 2.5 GHz in response to an operation signal from the control unit 40. Can be selected. Also, it has a VCO function, and the output can be varied from ⁇ 20 dBm to 0 dBm with an operation signal from the control unit 40.
- the first preamplifier (first predriver 30) is an amplifier having an amplification factor of about 16 dB.
- the first preamplifier is supplied with a drain voltage Vd4, a source voltage Vs4, and a gate bias Vg4 from a supply power supply.
- the second preamplifier is also an amplifier having an amplification factor of about 16 dB.
- a drain voltage Vd3, a source voltage Vs3, and a gate bias Vg3 are supplied from a supply power source to the second preamplifier (second predriver 31).
- the first preamplifier and the second preamplifier are collectively referred to as a driver 32.
- the output of the driver 32 is about 32 dBm.
- the output from the driver 32 is equally divided into two powers using the distributor 33.
- a Wilkinson circuit formed by a planar circuit pattern is used.
- the power signal (output from the driver 32) distributed in two by the distributor is input to the first final amplifier 34 and the second final amplifier 35, respectively.
- the voltages applied to the final amplifier 34 are the drain voltage Vd1 and the source voltage Vs1 gate voltage Vg1.
- the voltages applied to the final amplifier 35 are a drain voltage Vd2 and a source voltage Vs2 and a gate voltage Vg2.
- the first final amplifier 34 and the second final amplifier 35 each have an amplification factor of 11 dB. As a result, an output of 43 dBm (20 W) is obtained.
- the isolators 36 and 37 have a function of transmitting traveling waves and bypassing reflected waves and consuming them with a terminating resistor. This prevents the reflected power from the storage chamber (cavity) from being reflected by the first final amplifier 34 and the second final amplifier 35 to destroy the semiconductor.
- the directional coupler 38 functions like a signal sensor, and detects an incident wave after being attenuated by about 20 dB, and also detects a reflected wave after being attenuated by about 20 dB. Each signal is converted into a DC voltage via a detection circuit (not shown) and input to the control circuit 40.
- the output of the traveling wave directional coupler 38 is transmitted to the first antenna 6 via the first waveguide means (coaxial cable) 10 and radiated into the storage chamber (cavity).
- the output of the directional coupler 39 is transmitted to the second antenna 7 via the second waveguide means (coaxial cable) 11 and radiated into the storage chamber (cavity).
- FIG. 14 shows a block diagram including a transmission stopping device for radio wave generating means in Embodiment 3 of the present invention.
- the first drain SW41 applies or blocks the drain voltage of the first final amplifier 34.
- the second drain SW42 applies or blocks the drain voltage of the second final amplifier 35.
- the third drain SW 43 applies or blocks the drain voltage of the second pre-driver 31.
- the fourth drain SW 44 applies or blocks the drain voltage of the first pre-driver 30.
- the first drain SW41, the second drain SW42, the third drain SW43, and the fourth drain SW44 may be composed of components such as relays. In this case, when a coil voltage is applied to the relay, the switch is closed and a voltage is applied to the drain of the amplifier. When the coil voltage is removed, the switch is opened and the drain voltage is not applied to the amplifier.
- the operation signal of the switch is applied to the first drain SW41, the second drain SW42, the third drain SW43, and the fourth drain SW44 by signals S1 to S4 from the control unit 40 to control ON / OFF of the drain voltage. To do. When the drain voltage is applied, the amplifier operates normally. When the drain voltage is not applied, the amplifier stops functioning and is turned off.
- microwaves can be irradiated from both antennas, or the microwave signals can be stopped by both antennas. That is, microwave irradiation from the two antennas can be operated in any state.
- FIG. 15 is an explanatory diagram showing the pre-search function in Embodiment 3 of the present invention.
- the control unit 40 pre-searches the state of the reflected wave within the band range (allowable band range) of 2400 MHz to 2500 MHz with a weak signal (3 to 5 W) before performing the micro irradiation.
- FIG. 15 is a graph showing the results of pre-search with the vertical axis representing reflected power Pr / incident power Pf and the horizontal axis representing frequency.
- the value of reflected power Pr / incident power Pf is low at point A. That is, there are few reflected waves when the microwave of the frequency shown by A point is irradiated, and most of the irradiated microwave electric power is absorbed by the food arrange
- the member for waste heat such as a radiation fin
- the member for waste heat can also be designed very compactly.
- less power is required for the radio wave generating means, and the entire system can be designed more compactly and at a lower cost.
- Pr / Pf is on the vertical axis, but even if the vertical axis is Pr, almost the same result appears, and a frequency with the minimum reflected power Pr may be selected.
- FIG. 16 is a timing chart showing power distribution to a plurality of storage rooms in Embodiment 3 of the present invention.
- FIG. 16A shows a power pattern of microwave power applied to one storage room
- FIG. 16B shows a power pattern of microwave power applied to the other storage room.
- the rate of temperature decrease is slow due to the relationship of cooling capacity> heating power. Therefore, by slowly cooling, the food is in a so-called supercooled state in which it does not freeze even when it is below the freezing temperature.
- FIG. 5B shows the relationship of cooling capacity ⁇ heating power (heating capacity greatly exceeds the cooling capacity), and the temperature of the food is increased at a stretch to realize thawing. Therefore, in the case of this power pattern, the storage room side shown in (a) can be overcooled and the storage room side shown in (b) can be defrosted.
- the duty ratio of the power pattern As described above, by setting the duty ratio of the power pattern to a desired value, it is possible to arbitrarily select the two storage chambers to be in a supercooling mode or a thawing mode. For example, if the duty ratio is set to 1, thawing can be performed at the highest speed with the highest microwave irradiation power, and if the duty ratio is set to 0, the cooling capacity can be output to the maximum and freeze quickly.
- the temperature drop rate and temperature rise rate can be freely selected, and the treatment pattern of multiple storage rooms can be freely selected to the user's desired mode. It will be possible to provide highly functional equipment.
- a pre-search period is provided at the beginning of the ON / OFF cycle. Even if the temperature of the food changes, the tracking frequency can be successively reset and the efficiency of the equipment can be maintained at a high level at all times, and the reliability can be greatly improved.
- FIG. 17 shows a longitudinal sectional view of the refrigerator in the fourth embodiment of the present invention.
- the heat insulation box 101 which is the refrigerator main body of the refrigerator 100 can be insulated from the surroundings, and the inside is partitioned into a plurality of storage rooms by a partition wall.
- the heat insulating box 101 includes an outer box 102 mainly using a steel plate, an inner box 103 molded of a resin such as ABS, and a hard foamed urethane that is foam-filled in a space between the outer box 102 and the inner box 103. It is composed of foam insulation materials such as.
- a refrigerator compartment 104 is provided at the top of the heat insulation box 101, a storage compartment 105 and an ice making chamber 106 are provided side by side below the refrigerator compartment 104, a freezing compartment 107 is provided at the bottom of the storage compartment 105 and the ice making compartment 106, and Each storage room of the vegetable room 108 is arranged at the lower part.
- the refrigerating room 104 has a rotary door
- the storage room 105, the ice making room 106, the freezing room 107, and the vegetable room 108 each have a pull-out type door constituted by a rail (not shown).
- Each storage room having a drawer-type door has a case placed on a rail (not shown) or the like.
- the storage room 105 has a case 105a
- the ice making room 106 has an ice storage case 106a
- a freezing room are provided with a freezer compartment upper case 107a, a freezer compartment lower case 107b, and a vegetable compartment 108 with a vegetable compartment upper case 108a and a vegetable compartment lower case 108b.
- the refrigerator compartment 104 is set to a refrigeration temperature zone that is a temperature that does not freeze for refrigerated storage, and is usually set to 1 ° C. to 6 ° C., and the vegetable compartment 108 has a refrigeration temperature zone equivalent to the refrigerator compartment 104 or a slightly higher temperature setting.
- the vegetable temperature range is 2 °C to 8 °C.
- the freezer compartment 107 is set in a freezing temperature zone and is usually set at ⁇ 22 ° C. to ⁇ 15 ° C. for frozen storage, but for example, ⁇ 30 ° C. or ⁇ 25 ° C. to improve the frozen storage state. It may be set at a low temperature.
- the storage room 105 is composed of six surfaces including a top surface heat insulation wall 121, a bottom surface heat insulation wall 122, a right side heat insulation wall 123, a left side heat insulation wall 124, a storage room rear surface heat insulation wall 128, and a door 119, and cools the object 120 to be cooled. , Provided as a space to save.
- a door 119 is provided at an opening of the storage chamber 105, and the door 119 and the heat insulating box body 101 are air-blocked by a packing 118 to keep the storage chamber 105 in a sealed state.
- the refrigerator compartment 104 and the storage compartment rear heat insulation wall 128 are provided on the back side of the refrigerator compartment 104 which is a storage compartment in a refrigerator temperature zone which is held in a temperature zone 20 ° C. to 30 ° C. higher than the freezing temperature zone.
- a device storage section 104a provided therethrough is formed.
- a radio wave generating means 134 made of a semiconductor provided on a substrate and a control means 135 for controlling the operation of a refrigeration cycle such as the compressor 109 are provided.
- the cooling fan 113 and the compressor 109 are provided.
- the cooling fan 113 and the radiant heating means 114 are also electrically connected to the control means 135.
- a radio wave generator 134 and a power supply unit for supplying a DC voltage to the radio wave generator are arranged in the device storage section 104a.
- the object to be cooled 120 which is food, is irradiated from the antenna 132 disposed on the top surface of the freezing room 105, which is a storage room that irradiates the microwave from the radio wave generation means 134 with a coaxial cable.
- the power supply unit is a converter circuit that insulates commercial power and performs AC-DC conversion.
- a radio wave generator 134 and a power supply unit for supplying a DC voltage to the radio wave generator are arranged.
- the power supply unit that supplies the DC voltage to the radio wave generating means may be directly supplied from a DC power source from a storage battery that is charged by solar power generation or the like installed in a home where the refrigerator is used.
- a DC power source from a storage battery that is charged by solar power generation or the like installed in a home where the refrigerator is used.
- all of these device storage compartments can be driven by a DC power source.
- the power source for driving the compressor 109 and the power source for driving the cooling fan 113 are conventionally commercial power sources.
- a method of regulating a harmonic power supply although an AC power input is converted to DC, that is, AC-DC, and then converted to AC so that it becomes a regular sine wave, that is, DC-AC conversion. Since there is no need to worry about regulations, it is not necessary to provide additional harmonic regulation countermeasure parts, and it is possible to provide a device that is excellent in economic efficiency.
- the cooling fan 113 or the like is a cooling fan driven by a DC driving motor for DC driving, it is not necessary to change to AC, and simplification of the system can be expected.
- the radiant heating means 114 is driven by AC which is a commercial power supply.
- AC which is a commercial power supply.
- the radiant heating means 114 is generally heated by Joule heat due to a pure resistance load in terms of impedance, There is no need to distinguish between AC and DC, and the same performance can be obtained even when a DC power supply is directly applied, so a converter device that converts to AC is unnecessary.
- the function is not limited to the radio wave generating means 134 made of a semiconductor provided on the substrate, but a function addition device such as an ozonizer, an ionizer, and a mist spraying device.
- a function addition device such as an ozonizer, an ionizer, and a mist spraying device.
- function-added devices when equipped with function-added devices such as the ozonizer, ionizer, and mist spraying device that exhibit antibacterial performance, for example, daytime with the largest amount of power generation of solar power generation. In summertime when there is a lot of sunlight and the amount of sunlight, the amount of stored electricity increases, but the freshness of the refrigerator tends to decrease as the temperature rises. By operating the function addition device for a longer time period or at a larger output than other time periods, it is possible to improve the freshness of the refrigerator without affecting the household electricity bill.
- an inexpensive type refrigerator having only basic functions can be provided, for example, when providing various types of refrigerators. Even when providing various types of refrigerators such as a high-quality type refrigerator equipped with a function addition device or radio wave generation means 134 as a multi-function, by providing a device storage section 104a for centrally storing a control board and a power source.
- the same heat insulating box 101 can be used in common. Accordingly, it is not necessary to provide a plurality of molds and facilities in the manufacturing process, resource saving can be realized, and an environment-friendly refrigerator including the manufacturing process can be provided.
- a box 125 is disposed inside the storage chamber 105.
- the box 125 has an open portion 136 in which a wall facing the door 119 is in an open state, and the other surface is formed to be substantially closed.
- a lid 127 is attached to the door 119.
- the box body 125 and the lid body 127 are made of a metal such as stainless steel, aluminum, or a steel plate. Therefore, the inner wall surface of the independent storage section 126 is covered with metal.
- the box body 125 and the lid body 127 are not necessarily all made of metal. For example, only the inner wall surface of the independent storage section 126 may be used.
- a metal plate may be attached to the inner wall, or a metal film may be formed by a vapor deposition method or the like.
- a case 105 a for placing and storing the object 120 to be cooled is provided in the box 125 in the storage chamber 105.
- the case 105 a is pulled out toward the front, Allows for withdrawals.
- Various opening operations of the door 119 are conceivable, and the door 119 may be rotated about any of the upper and lower sides of the door 119, or may be rotated about the left and right sides of the door 119. . Further, the door 119 may be moved horizontally in the forward direction using a slide rail or the like. Further, the case 105a may or may not be interlocked with the operation of the door 119, and the effect in the present embodiment is not changed.
- the top surface portion of the heat insulating box 101 has a shape with a stepped recess toward the back of the refrigerator, and an upper machine chamber 101a is formed in the stepped recess, and the compressor 109,
- the high-pressure side components of the refrigeration cycle such as a dryer (not shown) for removing moisture are accommodated. That is, the machine room 101 a in which the compressor 109 is disposed is formed by biting into the uppermost rear region in the refrigerator compartment 104.
- the compressor 109 is disposed in the conventional refrigerator.
- the space in the machine room at the bottom of the easy-to-use heat insulation box 101 can be effectively converted as the storage room capacity, and the storage performance and usability can be greatly improved.
- the refrigeration cycle is formed of a series of refrigerant flow paths sequentially including a compressor 109, a condenser (not shown), a capillary (not shown) as a decompressor, and a cooler 112, and hydrocarbon refrigerant as a refrigerant.
- a compressor 109 a condenser (not shown), a capillary (not shown) as a decompressor, and a cooler 112
- hydrocarbon refrigerant as a refrigerant.
- isobutane is enclosed.
- Compressor 109 is a reciprocating compressor that compresses refrigerant by reciprocating a piston in a cylinder.
- these functional components may be disposed in the upper machine room 101a.
- the decompressor constituting the refrigeration cycle is a capillary, but an electronic expansion valve that can freely control the flow rate of the refrigerant driven by the pulse motor may be used.
- the matter relating to the main part of the invention described below is a type in which a compressor room is provided by providing a machine room in the rear region of the lowermost storage room of the heat insulating box 101, which has been generally used conventionally. It may be applied to other refrigerators.
- a cooling chamber 110 for generating cold air is provided on the back of the storage chamber 105 and the freezing chamber 107, and a freezing chamber back heat insulation 111 configured to be insulated from the freezing chamber 107 is configured on the back of the freezing chamber 107.
- a cooler 112 is disposed, and in the upper space of the cooler 112, the cold air cooled by the cooler 112 by a forced convection method is stored in the refrigerating chamber 104, the storage chamber 105, the ice making chamber 106,
- a cooling fan 113 for blowing air to the freezer compartment 107 and the vegetable compartment 108 is disposed.
- Cooling of the storage chamber 105 is performed by forced convection of the cooling fan 113, the cold air flowing into the storage chamber 105 from the discharge port 130 cools the storage chamber 105, and the cool air whose temperature after cooling is sucked from the suction port 131. Then, heat is exchanged by the cooler 112, and cold air is obtained again, and the circulation is repeated.
- a vapor compression refrigeration system using a compressor an absorption refrigeration system, a Peltier refrigeration system, or the like can be used.
- the antenna 132 is disposed on the top surface of the box 125 and is electrically connected to the radio wave generating means 134 by a coaxial cable or the like.
- a temperature detection means 133 is disposed on the top surface of the box 125 and is electrically connected to the control means 135.
- the control means 135 is also electrically connected to the radio wave generation means 134.
- radio wave generating means are conceivable. For example, there are those using a semiconductor such as Si, GaAs, SiC and GaN, and those using a magnetron.
- the antenna 132 and the temperature detection means 133 do not necessarily need to be on the top surface of the box 125, and may be on the back surface, the side surface, and the bottom surface.
- microwaves may be fed into the box 125 using a waveguide instead of the antenna 132.
- the temperature detection means 133 For example, an infrared sensor capable of detecting infrared rays, a thermistor using a change in resistance value due to temperature, or the like may be used.
- the compressor 109, the cooling fan 113, and the radiant heating means 114 described above are electrically connected to the control means 135.
- the refrigeration cycle is operated by a signal from the control means 135 according to the set temperature in the refrigerator, and the cooling operation is performed.
- the high-temperature and high-pressure refrigerant discharged by the operation of the compressor 109 is condensed to some extent by a condenser (not shown), and further, the side surface and the rear surface of the heat insulating box body 101 which is the refrigerator main body, and the front opening of the heat insulating box body 101.
- the heat insulating box 101 is condensed and liquefied while preventing the condensation of the heat insulating box 101 via a refrigerant pipe (not shown) disposed in the tube, and reaches a capillary tube (not shown). After that, the capillary tube is depressurized while exchanging heat with a suction pipe (not shown) to the compressor 109 to become a low-temperature and low-pressure liquid refrigerant and reaches the cooler 112.
- the low-temperature and low-pressure liquid refrigerant passes through a conveyance air passage (not shown) by the operation of the cooling fan 113 and is heat-exchanged with air in each storage chamber, and the refrigerant in the cooler 112 evaporates. At this time, cool air for cooling each storage chamber in the cooling chamber 110 is generated.
- the low-temperature cold air is diverted from the cooling fan 113 to the refrigerator compartment 104, the storage compartment 105, the ice making compartment 106, the freezer compartment 107, and the vegetable compartment 108 using an air passage or a damper, and cooled to the respective target temperature zones.
- the cooler 112 disposed in the cooling chamber 110 is cooled to about ⁇ 40 ° C. to ⁇ 20 ° C. by the refrigeration cycle. As a result, the air in the cooling chamber 110 is cooled and sent out by the cooling fan 113 through the discharge port 130 into the storage chamber 105.
- a box body 125 is disposed on the downstream side of the discharge port 130, and the cool air sent from the discharge port 130 into the storage chamber 105 contacts the box body 125 to cool the box body 125 itself.
- the box body 125 is made of metal, or at least part of the box body 125 is made of metal. Therefore, the entire box body 125 is cooled quickly and uniformly by its good thermal conductivity. It is possible.
- the lid 127 attached to the door 119 is also made of the same metal as the box 125, it has good thermal conductivity and can be quickly and uniformly cooled. Therefore, the inside of the independent storage section 126 surrounded by the box body 125 and the lid body 127 is uniformly cooled while minimizing variations in temperature distribution.
- the box 125 is rapidly cooled, thereby rapidly freezing the object 120 to be cooled stored in the independent storage section 126. Is possible.
- the cold air that circulates in the storage chamber 105 and cools the box 125 returns to the cooling chamber 110 from the inlet 131 and is cooled again by the cooler 112.
- the temperature detection means 133 attached to the top surface of the box body 125 can detect the air temperature inside the independent storage section 126, the case 105a, or the temperature of the object 120 to be cooled. This temperature information is sent as an electrical signal to the electrically connected control means 135, and the control means 135 appropriately controls the cooling fan 113 and the refrigeration cycle so that the temperature is set in advance. Specifically, the operation intervals of the cooling fan 113 and the refrigeration cycle can be varied.
- the temperature of the cooler 112 can be varied by controlling the number of revolutions of the compressor 109.
- the set temperature of the storage chamber 105 is about -20 degrees, which is the normal set temperature of the freezer compartment 107, about -7 ° C for storing foods and the like relatively softly, and maintaining the slightly frozen state of the food items -3
- a temperature of about 0 ° C. is conceivable. These temperature settings are examples, and are not limited to these three types.
- the case 105a is arranged in the independent storage section 126, the user can open the door 119 and pull out the case 105a to the near side. In this state, after the object to be cooled 120 such as food is placed in the case 105a, the case 105a is returned to its original position and the door 119 is closed. Considering the case without the case 105a, it is difficult to reach the back side of the independent storage section 126, and when a large number of objects 120 to be cooled are stored on the front side, it is difficult to access the space on the back side. Storability will fall.
- the case 105a By using the case 105a so that it can be pulled out to the front, the storage property of the object 120 to be cooled in the space on the back side of the case 105a can be improved, and the convenience can be improved. Further, as described above, at least the inner wall of the independent storage section 126 is made of metal, and the inside of the case 105a can be quickly cooled with minimal variations in temperature distribution and can be uniformly cooled. Therefore, by arranging the case 105a in the independent storage compartment 126 surrounded by metal, it is possible to improve the convenience of storing the object 120 to be cooled by the user and uniform refrigeration environment with reduced temperature distribution variation. This means that both maintenance is achieved.
- the warm air outside the refrigerator 100 flows into the independent storage compartment 126.
- the inner wall of the independent storage compartment 126 is made of metal, it can be set quickly even if the temperature rises once. Can return to temperature.
- the temperature in the independent storage section 126 is adjusted to about ⁇ 7 ° C. by the temperature detection means 133, the control means 135, the refrigeration cycle, and other cooling means. It is assumed that the object to be cooled 120 having a relatively high temperature of about 15 ° C. is stored in the case 105a in the independent storage section 126. Since the temperature of the independent storage section 126 is adjusted to about ⁇ 7 ° C., the stored object 120 is deprived of heat from the surroundings, and the temperature gradually decreases.
- the temperature of the object 120 to be cooled is detected by the temperature detecting means 133 provided on the top surface of the box 125.
- a signal is sent from the control means 135 to the radio wave generating means 134 to generate radio waves.
- the means 134 generates microwaves.
- the frequency of this microwave is the lowest reflection frequency (for example, 2.54 GHz).
- This microwave is sent to the antenna 12 through an electrically connected coaxial cable or the like, and irradiated from the antenna 12 to the object 120 to be cooled.
- the power applied to the object to be cooled 120 is about 2 to 3 W, which is sufficiently smaller than the energy for cooling the object 120 to be cooled, and the temperature of the object 120 to be cooled rises when irradiated with microwaves. Absent.
- the microwave frequency is 2.54 GHz, the effect of the present embodiment is not limited to this frequency, and may be, for example, 300 MHz to 3 THz. Further, the frequency of microwaves applied to the object to be cooled 120 after performing pre-search may be set.
- the object 120 to be cooled is a food containing moisture inside the meat.
- the microwave is not irradiated, the object 120 to be cooled is gradually frozen from the surface toward the center.
- the object 120 to be cooled irradiated with microwaves is in a supercooled state in which it does not freeze even after the water freezing point of 0 ° C. has passed.
- the supercooled state refers to a state in which, when cooled to a temperature below the freezing point, thermodynamically stable crystals do not appear and are held in an unstable liquid state.
- the temperature detection means 133 detects that the object 120 to be cooled has reached a certain temperature, for example, ⁇ 6 ° C.
- the operation of the radio wave generation means 134 is stopped by a signal from the control means 135. Or make the output variable.
- the supercooled state is released.
- the supercooling is released at any one place in the supercooling space, the influence is almost instantaneously propagated to the entire supercooling space, and thus the extremely fast freezing occurs inside the object 120 to be cooled.
- the maximum ice crystal formation zone ⁇ 1 to ⁇ 5 ° C.
- This action obtains the same result as the refrigeration quality obtained by a normal quick freezing method (utilization of cryogenic cold air etc.), and it can be said that the quick freezing is substantially realized.
- the box body 125 and the lid body 127 are made of metal meets this purpose. It is.
- the fitting portion between the box body 125 and the lid body 127 is configured such that microwaves do not leak. Also, from the viewpoint of preventing microwave leakage, the box body 125 and the lid body 127 need not be all made of metal, but only the inner wall surface of the independent storage section 126.
- the radio wave transmission suppressing portion provided in the drawer-type opening / closing door is opposed to the inner wall of the elliptical storage space for storing the object to be heated with a predetermined clearance relationship. It can be configured to effectively demonstrate the function of the radio wave transmission suppression part over the entire circumference, and is equipped with an open / close door that is compact in the area facing the opening area of the storage space and compact in the thickness direction.
- a storage space having a large opening area can be realized, which can be mounted on a drawer part of a kitchen system kitchen or can be integrated and mounted in another device such as a refrigerator or a vending machine serving as a food storage device.
- the food storage device can freely control the cooling rate and the heating rate using microwaves, and supercools and freezes food stored in a plurality of storage rooms with one high-frequency irradiation device.
- a new function is added to the refrigerator-freezer because it can be thawed at high speed, and a series of processes can be executed independently in a plurality of storage rooms, so that usability, convenience, and time saving are significantly improved.
Abstract
Description
図1は本発明の加熱装置の断面構成図、図2は本発明の加熱装置の収納空間部の概略斜視図、図3は図1の開閉扉の断面斜視、図4は図1のマイクロ波発生部の構成図である。
次に図5を用いて円偏波放射を利用した加熱装置について説明する。
図8は本発明の実施の形態3における冷蔵庫の貯蔵室の要部斜視図である。
図17は、本発明の実施の形態4における冷蔵庫の縦断面図を示すものである。
11 収納空間
12 開閉扉
13、52 電波発生手段
14 電波放射手段(パッチアンテナ)
15 同軸伝送線路
17、57 電力検出部(反射電力検出)
18、60 制御部
19、119 電波伝送抑制部
19a 電波調整部(電波伝送抑制部)
19b 開口部(電波伝送抑制部)
19c インピーダンス変換部の根元(電波伝送抑制部)
20 収納容器
21 支持手段
24 保持レール手段
30、130 基台(電波伝送抑制部)
31、131 電波伝搬方向抑制板(電波伝送抑制部)
51 マイクロ波放射アンテナ(円偏波放射)
(以下、実施の形態3、実施の形態4に関する符合の説明)
4 第1の貯蔵室
5 第2の貯蔵室
6 第1のアンテナ
7 第2のアンテナ
10 第1の導波手段
11 第2の導波手段
18、112 冷却器(冷却装置)
25、134電波発生手段
26 電源部
27a、104a 機器収納区画
135 制御手段
Claims (27)
- 被加熱物が収納される収納空間を形成する筐体と、
前記筐体の開口端に設けられた開閉扉と、
前記開閉扉によって引出し可能に備えられた収納容器と、
前記収納空間から外部への電波の漏洩を防止する電波伝送抑制部とを有し、
前記電波伝送抑制部は、
前記収納容器の引き出し方向が長手となるように形成され、前記筐体の内壁面と所定の隙間で前記開口端の周縁に沿って形成された電波調整部を備える
加熱装置。 - 前記電波調整部は、
一定の断面積で形成された隙間によって形成されたことを特徴とする
請求項1に記載の加熱装置。 - 前記電波伝送抑制部はさらに、
前記電波調整部と連通した開口部を有する空間であるインピーダンス変換部を備える
請求項1に記載の加熱装置。 - 前記インピーダンス変換部は、
前記収納容器の引き出し方向が長手方向となるように形成されたことを特徴とする
請求項3に記載の加熱装置。 - 前記インピーダンス変換部内部の空間断面は、前記収納空間の内方側が最も大きく、前記開閉扉側が最も小さくなる
請求項3に記載の加熱装置。 - 前記開口端は、
楕円形状としたことを特徴とする
請求項1~5のいずれか一項に記載の加熱装置。 - [規則91に基づく訂正 25.04.2011]
前記インピーダンス変換部は、
複数段に絞り加工を施した基台と、
前記基台の外周縁に基台に対して所定間隔で配設するとともにスリットを周期配設した電波伝搬方向抑制板にて構成した
請求項3に記載の加熱装置。 - 引出し様式の開閉扉は、
被加熱物を載置する収納容器を保持する支持手段を前記開閉扉に連接した構成とし、
前記支持手段の可動領域を規定するとともに前記収納空間内の左右壁面にて支持した保持レール手段とを有する
請求項1に記載の加熱装置。 - 収納空間にマイクロ波を供給する電波発生手段を備え、
前記収納空間内へマイクロ波を放射する電波放射手段は、
被加熱物の収納位置を規定した領域の中央に対向する位置とした
請求項1に記載の加熱装置。 - 前記電波発生手段は、
収納空間に供給するマイクロ波供給電力と前記収納空間から反射するマイクロ波反射電力とにおいて少なくともマイクロ波反射電力を検出する電力検出部を備え、
マイクロ波反射電力の信号に基づいて前記電波発生手段の動作周波数を規定制御する制御部を有する
請求項9に記載の加熱装置。 - 前記電波発生手段の出力を電波放射手段に伝送する同軸伝送線路を備えた
請求項9に記載の加熱装置。 - 前記電波放射手段は、
パッチアンテナ構成とした
請求項9に記載の加熱装置。 - 前記電波放射手段は、
円偏波を放射する構成とした
請求項9に記載の加熱装置。 - 前記収納空間を冷却する冷却手段と、
前記収納空間と外部空間との熱交換を抑制する冷気シール部材とを有したことを特徴とする
請求項1~13の加熱装置を備えた冷蔵庫。 - 前記冷気シール部材は、
前記電波伝送抑制部よりも外周側の前記開閉扉に備えられたことを特徴とする
請求項14に記載の冷蔵庫。 - 前記シール部材は、
前記電波伝送抑制部よりも前記扉側に備えたことを特徴とする
請求項14または請求項15に記載の冷蔵庫。 - 複数の貯蔵室と、
複数の前記貯蔵室を冷却する冷却装置と、
前記複数の貯蔵室のうち少なくとも1つの貯蔵室に供給する高周波を発生する電波発生手段と、
前記電波発生手段から高周波電力を受け複数の前記貯蔵室に高周波を照射する電波放射手段とを備え、
前記複数の貯蔵室は、前記冷却装置によって冷凍温度帯に維持される冷凍室を有し、
前記電波発生手段で発生した高周波電力は導波装置を介して前記電波放射手段に供給されるとともに、
前記電波発生手段は、前記冷凍室以外の貯蔵室と隣接する機器収納区画に備えられたことを特徴とする
冷蔵庫。 - 複数の前記貯蔵室の最上段の貯蔵室は、冷蔵温度帯に保持された冷蔵室であり、
前記電波放射手段は、冷凍室に備えられるとともに、
前記電波発生手段は、前記冷蔵室と隣接する機器収納区画に備えられる
請求項17に記載の冷蔵庫。 - 複数の前記貯蔵室に備えられる複数の前記電波放射手段を備え、
前記電波発生手段から複数の前記電波放射手段へ高周波電力を送電する複数の導波装置を備えたことを特徴とする
請求項17に記載の冷蔵庫。 - 前記電波放射手段は、平板状のアンテナであり、
前記貯蔵室の上方側に備えられる
請求項17に記載の冷蔵庫。 - 前記電波放射手段は、樹脂などのプリント基板を形成する材料からなる平板で片面を金属膜または金属箔からなる金属コーティングで覆い、導波手段から前記金属コーティングに高周波電力を供給する構成としたマイクロストリップ基板で形成し、もう片面は食品貯蔵室の各面のいずれかに固着設置されるアンテナである
請求項20に記載の冷蔵庫。 - 前記電波発生手段は、
発信部と、
少なくとも1個以上のアンプで構成されたドライバーと、
前記ドライバーの出力を分配する分配器と、
前記分配器で分配されたマイクロ波電力を受ける少なくとも2個以上のファイナルアンプと、
前記ファイナルアンプの出力を受け入射電力と反射電力のうち反射電力のみを取り出し終端負荷で電力消費させるアイソレータと、
前記アイソレータの後段に配し入射電力と反射電力をある減衰量をもってアッテネートし検知する方向性結合器と、
前記方向性結合器の信号をフィードバックし前記発信部を制御する制御部とを備える
請求項17に記載の冷蔵庫。 - 分配器で分配した少なくとも2個以上のマイクロ波電力を適宜複数の貯蔵室に割り当てる構成とした
請求項19に記載の冷蔵庫。 - 前記電波発生手段は、
発信部と、
少なくとも1個以上のアンプを有したドライバーとを備え、
前記発信部は、
制御部からの周波数可変信号によって周波数を変化させる機能を有し、
まず誘電加熱を行う前に電波発生手段として許容された周波数バンド内の全領域あるいは特定領域を掃引し反射電力と進行波電力を検知し反射電力レベル信号を入射電力信号で除した値が最も少なくなる点に周波数を固定して誘電加熱を行う構成とした
請求項17に記載の冷蔵庫。 - 前記電波発生手段は、
発信部と、
少なくとも1個以上のアンプを有したドライバーとを備え、
前記発信部は、
制御部からの周波数可変信号によって周波数を変化させる機能を有し、
まず誘電加熱を行う前に電波発生手段として許容された周波数バンド内の全領域あるいは特定領域を掃引し反射電力を検知し反射電力レベル信号が最も少なくなる点に周波数を固定して誘電加熱を行う構成とした
請求項17に記載の冷蔵庫。 - 前記制御部は、
複数の貯蔵室への誘電加熱を時間軸として分割して行い、
ある貯蔵室にマイクロ波電力を照射する時は、制御部にフィードバックされる反射電力レベルが最小になる周波数を選択してから誘電加熱を行い、
また、制御部内に組み込まれた時間軸の分割の律則にしたがいその他の貯蔵室を加熱する場合は再度、周波数掃引を行い反射電力レベルが最小になる周波数を再選択して反射電力レベルが最小になる周波数を選択してから誘電加熱を行う構成として、各々の貯蔵室が誘電加熱される時間の割合から食品の冷却速度あるいは加熱速度を変化させる構成とした
請求項22に記載の冷蔵庫。 - 複数の貯蔵室へのマイクロ波の照射のON/OFFは、ファイナルアンプへドレイン電力を供給あるいは遮断する動作選択スイッチによって構成した
請求項22に記載の冷蔵庫。
Priority Applications (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN2011800091166A CN102754522A (zh) | 2010-03-23 | 2011-03-22 | 加热装置和冷藏库 |
JP2012506842A JPWO2011118198A1 (ja) | 2010-03-23 | 2011-03-22 | 加熱装置および冷蔵庫 |
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JPWO2011118198A1 (ja) | 2013-07-04 |
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