CN103229593B - Microwave heating equipment - Google Patents
Microwave heating equipment Download PDFInfo
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- CN103229593B CN103229593B CN201180057141.1A CN201180057141A CN103229593B CN 103229593 B CN103229593 B CN 103229593B CN 201180057141 A CN201180057141 A CN 201180057141A CN 103229593 B CN103229593 B CN 103229593B
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Abstract
The present invention provides microwave heating equipment, this microwave heating equipment uniformly and efficiently to heating object can carry out microwave heating without using rotating mechanism, it is configured to for this: transmitting on the surface relative with heating chamber (2) in the waveguide portion (5) of the microwave of microwave generating unit (4), radiating multiple microwave radiation portions (6) of circularly polarized wave in arranging oriented heating chamber, multiple microwave radiation portions radiate the microwave of roughly the same amount of radiation respectively.
Description
Technical field
The present invention relates to the microwave heating equipments such as microwave oven, particularly at microwave radiation portion textural, there is feature
Microwave heating equipment.
Background technology
As the representative device of the microwave heating equipment that with microwave, object is carried out heat treated, there is microwave oven.
In microwave oven, the microwave radiation produced in microwave generator to metal heating chamber, by the microwave of radiation to adding
Heating object within hot cell carries out heat treated.
As the microwave generator in conventional microwave oven, employ magnetron.The microwave generated by magnetron is via ripple
Conduit is radiated heating chamber.When the magnetic distribution of the microwave of heating chamber is uneven, it is impossible to equably to being added
Hot thing carries out microwave heating.
In the past, as making the means of the homogeneous heating to heating object, usually there is microwave heating constructed as below
Device: make mounting heating object mounting table rotate and make heating object rotate structure, fix heating object and make radiation micro-
Structure that the antenna of ripple rotates or changed the structure of phase place of the microwave produced from microwave generator by the phase shifter.
Such as, in conventional microwave heating equipment, inside waveguide, it is configured with rotable antenna, antenna axis etc.,
Make rotable antenna rotate while magnetron is driven by antenna electrical, thus reduce the microwave in heating chamber and be distributed not
Uniformly.
It addition, as described in Japanese Laid-Open Patent Publication 62-064093 publication (patent documentation 1), it is proposed that at magnetic
The microwave heating equipment of rotable antenna it is provided with on keyholed back plate.In the microwave heating equipment of patent documentation 1, by will be from
The cooling wind of Air Blast fan is to the blade of rotable antenna, thus utilizes the wind-force of this Air Blast fan to make antenna rotate, and change adds
Microwave distribution in hot cell.
On the other hand, as having the example of phase shifter, there is No. 4301347 description of U.S. Patent No. (patent documentation 2)
Described in microwave heating equipment, the heating that this microwave heating equipment had both reduced heating object in microwave heating is uneven, real again
Show cost to reduce and the space saving of power supply section.As described in the Patent Document 2, it is proposed that set at heating chamber
It is equipped with a microwave radiation portion for radiating circularly polarized wave and for changing the microwave heating equipment of the rotating mechanism of phase place.
Prior art literature
[patent documentation]
Patent documentation 1: Japanese Laid-Open Patent Publication 62-064093 publication
Patent documentation 2: No. 4301347 description of U.S. Patent No.
Patent documentation 3: Japanese Unexamined Patent Publication 2007-225186 publication
Summary of the invention
Invent problem to be solved
For microwave heating equipment as microwave oven, it is desirable to simple structure, efficiently and be uniformly heated up
Heating object.But, there is various problem in structure the most conventional disclosed in up to now.
It addition, in microwave heating equipment, particularly microwave oven, the technological development development of high output, in Japan
Domestic sell specified high frequency output be the commodity of 1000W.Microwave heating equipment heats food not by conduction of heat
Device, microwave heating equipment is the facility that sensing heating can be utilized to directly heat food as the marked feature of commodity
Property.But, in microwave oven, the problem that the high output under the state that unresolved heating is uneven can cause heating uneven is brighter
Aobvious.
The constructional problem being had as conventional microwave heating equipment, can enumerate following 2 points.First is,
Need to reduce heating uneven to use the mechanism making mounting table or antenna rotate.Therefore, at conventional microwave heating equipment
In, it is necessary to ensure that for making mounting table or the revolution space of antenna rotation and for the motor etc. making mounting table or antenna rotate
The installation space of drive mechanism, hinders the miniaturization of microwave heating equipment.
Second point is, in order to rotate with making mounting table or antenna stabilization, needs this rotable antenna is arranged on heating chamber
Top or bottom, structure is restricted.
In microwave heating equipment, the meeting such as rotating mechanism that mounting table or phase shifter are set in the space of illuminated microwave
Reduce reliability.It is therefore desirable to be implemented without the microwave heating equipment of these mechanisms.
It addition, uneven to the heating of heating object in order to reduce in microwave heating, realize cost simultaneously and reduce and power supply section
Space save, as described in patent documentation 2, from single microwave radiation portion micro-to heating chamber radiation circularly polarized wave
In Wave heating device, although the advantage having the rotating mechanism not possessing mounting table or antenna, but there is as described below asking
Topic: this microwave heating equipment needs the rotating mechanism for changing phase place, and relies on the microwave from single microwave radiation portion
Radiation cannot carry out the most uniformly heating to heating object.
The present invention be the problem in order to solve in above-mentioned conventional microwave heating equipment and complete, it is intended that carry
For a kind of microwave heating equipment that can uniformly and efficiently heating object be carried out microwave heating without rotating mechanism.
Means for solving the above
The present invention has to achieve these goals: heating chamber, and it receives heating object；Mounting portion, it constitutes described
The bottom surface of heating chamber, storage mounting heating object in described heating chamber；Microwave generating unit, it produces described microwave；Waveguide portion,
It transmits the microwave from described microwave generating unit；And multiple microwave radiation portion, its be arranged on described waveguide portion with described
On the surface that heating chamber is relative, in heating chamber, radiate circularly polarized wave.
In the microwave heating equipment of the present invention configured as described above, it is possible to suppression is in conventional microwave heating equipment
Microwave heating in become problem, because of between the microwave being radiated in heating chamber and the microwave reflected by the inwall of heating chamber etc.
Interference and the standing wave that produces, it is possible to realize uniform microwave heating.
Invention effect
In the microwave heating equipment of the present invention, do not use rotating mechanism, it is possible to simple even structure and efficiently
Ground carries out microwave heating to heating object, and is capable of the raising of the miniaturization of power supply section, reliability.
Accompanying drawing explanation
Fig. 1 is the axonometric chart of the microwave heating equipment illustrating embodiments of the present invention 1.
Fig. 2 is the sectional view of the microwave heating equipment of embodiment 1.
Fig. 3 is the top view of the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiment 1.
Fig. 4 is the figure of the concrete shape in the microwave radiation portion used in the microwave heating equipment illustrating embodiment 1.
Fig. 5 is the axonometric chart of the microwave heating equipment illustrating embodiments of the present invention 2.
Fig. 6 is the waveguide top view in the microwave radiation portion in the microwave heating equipment illustrating embodiment 2.
Fig. 7 is the axonometric chart illustrating general rectangular waveguide.
Fig. 8 is the axonometric chart of the microwave heating equipment illustrating embodiments of the present invention 3.
Fig. 9 is the waveguide top view in the microwave radiation portion in the microwave heating equipment illustrating embodiment 3.
Figure 10 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 4 is overlooked
Figure.
Figure 11 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 5 is overlooked
Figure.
Figure 12 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 6 is overlooked
Figure.
Figure 13 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 7 is overlooked
Figure.
Figure 14 is the figure of the concrete structure illustrating the microwave radiation portion in embodiment 6 and embodiment 7.
Figure 15 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 8 is overlooked
Figure.
Figure 16 is the figure of other structures in the microwave radiation portion in the microwave heating equipment illustrating embodiment 8.
Figure 17 is the axonometric chart of the microwave heating equipment illustrating embodiments of the present invention 9.
Figure 18 is the waveguide top view in the microwave radiation portion in the microwave heating equipment illustrating embodiment 9.
Figure 19 is the axonometric chart of the microwave heating equipment illustrating embodiments of the present invention 10.
Figure 20 is the waveguide top view in the microwave radiation portion in the microwave heating equipment illustrating embodiment 10.
Figure 21 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 11 is overlooked
Figure.
Figure 22 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 12 is overlooked
Figure.
Figure 23 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 13 is overlooked
Figure.
Figure 24 is that the waveguide in the microwave radiation portion in the microwave heating equipment illustrating embodiments of the present invention 14 is overlooked
Figure.
Figure 25 is the axonometric chart of the microwave heating equipment illustrating embodiments of the present invention 15.
Figure 26 is the front section view of the microwave heating equipment of embodiment 15.
Figure 27 is the section plan that the bottom surface sections of the heating chamber in the microwave heating equipment illustrating embodiment 15 is graded.
Figure 28 is the front section view of the microwave heating equipment of embodiments of the present invention 16.
Figure 29 is the section plan that the bottom surface sections of the heating chamber in the microwave heating equipment illustrating embodiment 16 is graded.
Figure 30 is the sectional view illustrating conventional microwave heating equipment.
Detailed description of the invention
In the 1st invention, have:
Heating chamber, it receives heating object；
Mounting portion, it constitutes the bottom surface of described heating chamber, receives mounting heating object in described heating chamber；
Microwave generating unit, it produces described microwave；
Waveguide portion, it transmits the microwave from described microwave generating unit；And
Multiple microwave radiation portions, it is arranged on the surface relative with described heating chamber in described waveguide portion, to heating chamber
Interior radiation circularly polarized wave.
In the microwave heating equipment of the 1st invention configured as described above, it is possible to suppression is at conventional microwave heating equipment
Microwave heating in become problem, because of between the microwave being radiated in heating chamber and the microwave reflected by the inwall of heating chamber etc.
Interference and the standing wave that produces, it is possible to realize uniform microwave heating.
In the 2nd invention, the plurality of microwave radiation portion is arranged in the underface of described mounting portion.The 2nd so constituted
The microwave heating equipment of invention can carry out microwave heating to heating object equably.
Being configured in the microwave heating equipment of the 3rd invention, the plurality of microwave radiation portion radiates roughly the same respectively
The microwave of amount of radiation.The microwave heating equipment of the 3rd invention so constituted can carry out microwave heating to heating object equably.
4th invention is especially in the 3rd invention, the plurality of microwave radiation portion at least sender in described waveguide portion
Upwards it is arranged.In the microwave heating equipment of the 4th invention so constituted, by microwave radiation portion be properly be arranged in
At desired locations, it is possible to uniformly and efficiently to heating object carry out microwave heating.
5th invention is especially in the 3rd invention, the plurality of microwave radiation portion at least in described waveguide portion with transmission
It is arranged on direction and the vertical direction of direction of an electric field.The microwave heating equipment of the 5th invention so constituted can be uniform
And efficiently heating object is carried out microwave heating.
6th invention is especially in the 4th or the 5th invention, the plurality of microwave radiation portion be make two slits (slit) that
The shape that the long limit of this intersection and each slit tilts relative to the direction of transfer in described waveguide portion.The 6th so constituted
Bright microwave heating equipment uniformly and efficiently to heating object can carry out microwave heating.
7th invention is that the plurality of microwave radiation portion is to make two slits intersected with each other especially in the 4th or the 5th invention
And the shape that the long limit of each slit tilts relative to the direction of transfer in described waveguide portion, it is configured to the long length of side of described slit
Spend different according to the position on the direction of transfer in described waveguide portion.Microwave heating equipment in the 7th invention so constituted
In, by changing configuration and the slit length in microwave radiation portion in microwave radiation portion respectively, it is possible to control microwave radiation amount, it is possible to
Uniformly and efficiently to heating object carry out microwave heating.
8th invention is that the plurality of microwave radiation portion is to make two slits intersected with each other especially in the 4th or the 5th invention
And the shape that the long limit of each slit tilts relative to the direction of transfer in described waveguide portion, it is configured to the long length of side of described slit
Spend different according to the position on the direction vertical from direction of transfer and direction of an electric field in described waveguide portion.So constitute
The microwave heating equipment of the 8th invention uniformly and efficiently to heating object can carry out microwave heating.
9th invention is that the plurality of microwave radiation portion is to make two slits intersected with each other especially in the 4th or the 5th invention
And the shape that the long limit of each slit tilts relative to the direction of transfer in described waveguide portion, it is configured to the width root of described slit
Different according to the position on the direction of transfer in described waveguide portion.In the microwave heating equipment of the 9th invention so constituted, no
Only change the configuration in microwave radiation portion, but also change the slit width in microwave radiation portion, it is possible to change in heating chamber
Microwave is distributed, it can be ensured that the uniformity of the microwave distribution in heating chamber.
10th invention is that the plurality of microwave radiation portion is to make two slits intersected with each other especially in the 4th or the 5th invention
And the shape that the long limit of each slit tilts relative to the direction of transfer in described waveguide portion, it is configured to the width root of described slit
Different according to the position on the direction vertical from direction of transfer and direction of an electric field in described waveguide portion.The 10th so constituted
The microwave heating equipment of invention uniformly and efficiently to heating object can carry out microwave heating.
11st invention is that the plurality of microwave radiation portion is to make two slits intersected with each other especially in the 4th or the 5th invention
And the shape that the long limit of each slit tilts relative to the direction of transfer in described waveguide portion, real to the cross section of described slit
R chamfer machining or C chamfer machining are executed.In the microwave heating equipment of the 11st invention so constituted, it is possible to reduce microwave spoke
Penetrate the microwave loss in portion, it is possible to efficiently heating object is carried out microwave heating.
12nd invention is that the plurality of microwave radiation portion is to make two slits intersected with each other especially in the 4th or the 5th invention
And the shape that the long limit of each slit tilts relative to the direction of transfer in described waveguide portion, real to the end section of described slit
R chamfer machining or C chamfer machining are executed.In the microwave heating equipment of the 12nd invention so constituted, it is possible to reduce microwave spoke
Penetrate the microwave loss in portion, it is possible to efficiently heating object is carried out microwave heating.
13rd invention is that the plurality of microwave radiation portion is to make two slits intersected with each other especially in the 4th or the 5th invention
And the shape that the long limit of each slit tilts relative to the direction of transfer in described waveguide portion, about the cross section of described slit
Position, there is following shape: from described microwave generating unit position is set transmitting range length microwave radiation portion with from
The microwave radiation portion arranging the transmitting range risen position short of described microwave generating unit compares, from described waveguide portion to described heating
The microwave emissivity of room is high.The microwave heating equipment of the 13rd invention so constituted can uniformly and efficiently to heating object enter
Row microwave heating.
14th invention is especially in the 3rd invention, and in described heating chamber, the mounting portion of storage mounting heating object has
The microwave transparent portion of microwave transparent, described microwave transparent portion is made to be arranged as opposed to described microwave radiation portion, described microwave transparent
Portion is arranged at least surface in described microwave radiation portion.In the microwave heating equipment of the 14th invention so constituted, it is possible to
The region making microwave transparent in mounting portion is configured little.Its result, in microwave heating equipment, it is possible to reduce because of in mounting portion
The loss amount of the microwave energy that the reason of middle absorption microwave causes, it is possible to increase the microwave efficiency of heating surface to heating object, it is possible to
Realize excellent energy-efficient performance.
Further, since be mode microwave being powered in heating chamber with circularly polarized wave, therefore need not rotable antenna and
For driving the motor of rotable antenna, therefore need not arrange the driving space of these mechanisms and installation space, it is possible to make micro-
Wave heating equipment miniaturization, it is possible to reduce installation space.
15th invention is that described microwave transparent portion has the shape corresponding with described microwave radiation portion especially in the 14th invention
Shape.In the microwave heating equipment of the 15th invention so constituted, it is possible to the penetrating region of microwave is configured to necessary minimum
Limit, it is possible to reduce the microwave absorption loss in microwave transparent portion further.Its result, microwave heating equipment can carry further
The high microwave power supplying efficiency to heating chamber.
16th invention is especially in the 15th invention, and described mounting portion is configured to have described microwave transparent portion and reflection is micro-
The microwave reflection portion of ripple.In the microwave heating equipment of the 16th invention so constituted, it is configured to utilize microwave reflection portion to come anti-
Penetrate the microwave not absorbed by heating object, therefore promote the microwave absorption of heating object, it is possible to improve adding of microwave further
The thermal efficiency.
17th invention is especially in the 16th invention, described microwave transparent portion by comprise silicon oxide, aluminium oxide, zirconium oxide or
The glass ceramics of at least any one material in lithium oxide is constituted.Microwave heating equipment in the 17th invention so constituted
In, it is possible to increase the through performance of microwave, therefore, it is possible to increase the microwave energy of radiation in heating chamber, it is possible to increase microwave pair
The efficiency of heating surface of heating object.
18th invention is that described microwave transparent portion is made up of the material that main constituent is plastics especially in the 16th invention.?
In the microwave heating equipment of the 18th invention so constituted, compared with glass ceramics, it is possible to improve the permeability of microwave further
Can, therefore, it is possible to improve the efficiency of heating surface of heating object.
19th invention is that described microwave reflection portion is made up of metal material especially in the 16th invention.So constitute
In the microwave heating equipment of the 19th invention, it is possible to increase the reflection characteristic of microwave, therefore, it is possible to improve microwave further to being added
The efficiency of heating surface of hot thing.
Hereinafter, referring to the drawings the preferred implementation of the microwave heating equipment of the present invention is illustrated.Although it addition,
Microwave oven is illustrated by the microwave heating equipment of following embodiment, but microwave oven simply illustrates, the present invention's
Microwave heating equipment is not limited to microwave oven, also includes the microwave heating equipment that make use of sensing heating.It addition, the invention is not restricted to
The following concrete structure in embodiment, also includes structure based on constructed thought.
(embodiment 1)
Fig. 1 is the axonometric chart of the microwave oven of the microwave heating equipment being shown as embodiments of the present invention 1.Fig. 2 be
Cut off with the face parallel with front at the approximately mid way between of the depth direction of the microwave heating equipment of embodiments of the present invention 1
And the sectional view obtained, it is shown that main composition part.Fig. 3 is the top view of the waveguide as waveguide portion, it illustrates
As the position in microwave radiation portion of antenna of microwave of radiation circularly polarized wave in the microwave heating equipment of embodiments of the present invention 1
Put.
As it is shown in figure 1, the microwave oven as the microwave heating equipment 1 of embodiment 1 has: door 7, it has at front surface
Window；Heating chamber 2, it is airtight by closedown door 7, receives by the heating object of microwave heating；And mounting portion 3, it is used for
At the inside of heating chamber 2 storage mounting heating object.
In the underface of mounting portion 3, as the microwave radiation unit to the internal radiation microwave of heating chamber 2, it is provided with many
Individual microwave radiation portion 6.Each microwave radiation portion 6 is configured to the internal radiation circularly polarized wave to heating chamber 2.
As in figure 2 it is shown, the microwave heating equipment 1 of embodiment 1 has: microwave generator 4, it is by producing microwave
The microwave generating unit that magnetron etc. are constituted；And waveguide 5, it is to be transmitted in microwave generator 4 to each microwave radiation portion 6
The waveguide portion of the microwave produced.
As it is shown on figure 3, in the microwave heating equipment 1 of embodiment 1, the upper surface at waveguide 5 be formed multiple to
The internal radiation of heating chamber 2 is as the microwave radiation portion 6 of the microwave of the roughly the same amount of circularly polarized wave.Microwave radiation portion 6 is joined
It is set to uniformly and efficiently to the heating object in mounting portion 3 carry out microwave heating.
In the case of microwave radiation portion is single, the relation of the directivity etc. of microwave owing to being radiated, it is difficult to uniformly
Ground adjusts the microwave distribution in heating chamber.Such as, at the microwave heating equipment being provided with a high microwave radiation portion of directivity
In, only intensively heated near microwave radiation portion.Its result, creates and occurs uneven the asking of heating in heating object
Topic.
The microwave heating equipment 1 of embodiment 1 is configured to, relative with heating chamber 2 at the waveguide 5 as waveguide portion
Multiple microwave radiation portion 6 it is provided with, from each microwave radiation portion 6 to the internal radiation of heating chamber 2 as circularly polarized wave on surface
The microwave of roughly the same amount.Therefore, even if in the case of there is high directivity from the microwave in each microwave radiation portion 6,
It also is able to heating object is realized uniform microwave heating.
The microwave heating equipment 1 of embodiment 1 is configured to, and microwave radiation portion 6 radiates the microwave of circularly polarized wave.Because in the past
General microwave heating equipment have from microwave radiation portion to heating chamber radiation polarization ripple that (plane of polarization of electric field is solid
The structure of microwave calmly), so, because being radiated between the microwave of heating chamber and the microwave reflected by the inwall of heating chamber etc.
Interference and produce standing wave, become the reason that the heating of heating object is uneven.And in the microwave heating equipment 1 of embodiment 1,
Can suppress to become in the microwave heating of conventional microwave heating equipment problem, because of radiation microwave with by heating chamber
Interference between the microwave of the reflection such as wall and the generation of standing wave that generates, it is possible to realize uniform microwave heating.
Hereinafter, circularly polarized wave is illustrated.Circularly polarized wave is to be widely used in the field of mobile communication and satellite communication
Technology.Make use-case as familiar, ETC(Electronic-Toll Collection System can be enumerated) " electronics is not
Stopping charging system " etc..
Circularly polarized wave is the microwave that the plane of polarization of electric field rotates in time relative to the direct of travel of electric wave, when forming circle partially
Shake ripple time, the direction of electric field the most persistently changes.So, when to the microwave of heating chamber radiation circularly polarized wave, due to
The direction of the electric field being radiated the microwave of heating chamber persistently changes, therefore regardless of place, and the size of electric field intensity
The most generally uniform, consider the reflection of heating chamber inwall etc. be also not easy to cause the feature of standing wave even if having.
The microwave heating equipment 1 of embodiment 1 is configured to, and is provided with multiple microwave radiation portion 6, from each microwave radiation portion
6 to the microwave of the internal radiation circularly polarized wave of heating chamber 2.The microwave heating equipment 1 of embodiment 1 configured as described above with
Toward general microwave heating equipment in the microwave heating that realized of the microwave of linearly polarized wave that uses compare, it is possible to heating chamber
The inner homogeneous eradiation microwave of 2, it is possible to equably the heating object within heating chamber 2 is carried out microwave heating.
Circularly polarized wave is classified as right-handed polarized wave (CW:clockwise, clockwise) and left-hand polarization according to direction of rotation
Ripple (CCW:counter clockwise, counterclockwise) the two kind.No matter being radiated the circularly polarized wave within heating chamber 2 is
Any in right-handed polarized wave (CW) or left-hand polarized wave (CCW), does not all have difference on heating properties.
Transmitting from the waveguide of the microwave of the microwave generators such as magnetron, generation is shaking of electric field and magnetic field
Dynamic direction is the microwave of the linearly polarized wave of fixed-direction.As it has been described above, in conventional general microwave heating equipment, from waveguide
The pipe microwave to heating chamber radiation polarization ripple.Therefore, conventional general at radiation polarization ripple in heating chamber
In microwave heating equipment, in order to reduce in heating chamber microwave distribution uneven, be provided with the mounting making mounting heating object
Platform rotate mechanism, make from waveguide to heating chamber radiation microwave antenna rotate mechanism or for the pipe at waveguide
The phase shifter of interior change phase place.
But, even if being provided with the mechanism and phase shifter making mounting table or antenna rotate, it is also difficult at microwave heating equipment
Heating chamber in realize uniform microwave heating.And, in conventional microwave heating equipment, owing to needs arrange rotating mechanism
And the phase shifter, therefore number of components increases, and structure complicates, and structure is restricted, and the reliability creating device reduces
Problem.
The problem reduced about complication, the restriction of structure and the reliability of structure as above, at embodiment 1
Microwave heating equipment 1 in there is the structure that can eliminate all these problem.The microwave heating equipment 1 of embodiment 1 is constituted
For, multiple microwave radiation portions 6 are arranged on the surface relative with heating chamber 2 of waveguide 5, from 6 points of multiple microwave radiation portions
Not to the internal radiation of heating chamber 2 as the microwave of the roughly the same amount of radiation of circularly polarized wave.Therefore, the microwave of embodiment 1
Heater 1 becomes device as follows: its simple structure, and the restriction to structure is few, has the structure that reliability is high, it is possible to
Uniformly and efficiently to heating object carry out microwave heating.
[condition of microwave radiation amount change]
As it has been described above, in the microwave heating equipment 1 of embodiment 1, it is not necessary to the machine making mounting table or antenna rotate is set
Structure and phase shifter etc., the heating object within heating chamber 2 can be realized uniform microwave heating.Therefore, at embodiment 1
In microwave heating equipment 1, it is possible to reliably avoid when the fault of rotating mechanism and produce during abnormal operation heating action time
The unequal problem of heating of heating object.
And, when transmitting from the microwave that the microwave generators such as magnetron 4 produce, when using waveguide 5 as transmission
During unit, change according to three below condition to the amount of the microwave of the internal radiation of heating chamber 2 from each microwave radiation portion 6.
First condition is with reference to Fig. 2 at direction of transfer X() on from the microwave generators such as magnetron 4 to microwave radiation portion
The distance (position) of 6.The cause that microwave amount changes according to the distance (position) on direction of transfer X in this wise is: for from micro-
For the microwave that wave generation device 4 produces, in the short position of the transmitting range from microwave generator 4 and due to waveguide
The bendings of pipe etc. make the position that direction of transfer X changes, the transmission state labile of microwave, and the electric field in waveguide divides
Cloth becomes mixed and disorderly state, and the transmitting range from microwave generator 4 far from, in stable condition.
Such as, use the waveguide 5 bending to L word shown in Fig. 2 in the case of transmitting microwave, from being arranged in bending
The microwave amount of microwave radiation portion 6 radiation of portion's periphery more than with bending section periphery at sufficient distance away from microwave radiation portion 6 micro-
Ripple amount, the amount of the microwave radiated significantly increases and decreases according to the change in location on direction of transfer X.
Second condition be on the direction of transfer X in Fig. 2 from the terminal of waveguide 5 i.e. end face 15 to microwave radiation portion 6
Distance.Because the inside of waveguide 5 transmit microwave be linearly polarized wave, so, due to the end face 15 of waveguide 5
Interference between echo, produces standing wave in the inside of waveguide 5.Generally, on the end face of waveguide 5, electric field is zero, because of
This electric field intensity is because changing with end face 15 distance on direction of transfer X.Therefore, the inside of heating chamber 2 it is radiated
Microwave amount increases and decreases to the distance in microwave radiation portion 6 from the end face 15 of waveguide 5 according on direction of transfer X.
That is, on direction of transfer X with end face 15 distance is standing wave wavelength the 1/4 of waveguide 5 position
Electric field intensity is maximum, on direction of transfer X with end face 15 distance is standing wave wavelength the 1/2 of waveguide 5 position
Place's electric field intensity is minimum.
Therefore, even the microwave radiation portion 6 of same shape, if on direction of transfer X with the end face 15 of waveguide 5
Distance is different, then the microwave amount from the radiation of each microwave radiation portion 6 increases and decreases.
3rd condition be in waveguide 5 with direction of transfer X and direction of an electric field Y(with reference to Fig. 2) vertical direction (waveguide
Position on the width Z of pipe 5: reference Fig. 3).This is because, transmit microwave waveguide 5 in, with direction of transfer X with
And the electric field intensity difference on the direction (width Z) that direction of an electric field Y is vertical.
In general, in the microwave heating equipments such as microwave oven, transmit microwave with TE10 pattern.Therefore, with through with
The mode of the waveguide central authorities on direction (width Z) vertical for direction of transfer X and direction of an electric field Y, exists along transmission
The axis of symmetry of the Electric Field Distribution that direction X extends.
It addition, in the case of being configured with multiple microwave radiation portion on the same straight line of direction of transfer X, according to adjacent micro-
Wave radiation portion interval L(on direction of transfer X is with reference to Fig. 6, Figure 12 described later), it is radiated heating chamber from each microwave radiation portion
The relation of internal microwave amount changes.
Such as, in adjacent microwave radiation portion, the interval L on direction of transfer X becomes and the standing wave of generation in waveguide
During the equal length of wavelength, give off the microwave of same electric field intensity from adjacent microwave radiation portion.
But, in adjacent microwave radiation portion, the interval L on direction of transfer X becomes and the standing wave of generation in waveguide
During the different length of wavelength, give off from each microwave radiation portion and there is the microwave that electric field intensity corresponding with difference in length is poor.
On the basis of considering three above condition, in the structure of embodiment 1, microwave radiation portion 6 is disposed in
On the surface relative with heating chamber 2 of waveguide 5 so that the even microwave distribution of heating chamber.Therefore, even if by microwave spoke
Penetrate the position that portion 6 is arranged in the central symmetry of inner space about heating chamber 2, if not considering that above three condition is joined
Putting microwave radiation portion 6, the distribution of the microwave in heating chamber 2 is also uneven the most in most cases.
Therefore, in the microwave heating equipment of the embodiment 1 on direction of transfer X with multiple microwave radiation portion 6, pass through
Multiple microwave radiation portions 6 are disposed in rightly the inner space realizing heating chamber 2 at desired locations microwave distribution equal
Homogenized technology is requisite.
[structure in microwave radiation portion]
In the microwave heating equipment of embodiment 1, the structure in the microwave radiation portion 6 of radiation circularly polarized wave is said
Bright.In the microwave heating equipment of embodiment 1, as the structure in microwave radiation portion 6, as long as having the knot of radiation circularly polarized wave
Structure, is not particularly limited, but as the illustration of concrete shape, illustrates with reference to Fig. 4.Fig. 4 shows embodiment 1
Microwave heating equipment in the concrete shape in microwave radiation portion that uses.Microwave radiation portion 6 shown in Fig. 4 is by least two
Slit (elongated opening portion) constitute.Microwave radiation portion 6 is formed on the surface relative with heating chamber 2 of waveguide 5, and
And the center P deviation of the waveguide 5 being formed at from the direction (width Z) vertical with direction of transfer X and direction of an electric field Y
Position.
In the diagram, (a)～(f) shows the microwave radiation portion 6 with 6 kinds of shapes.As shown in Figure 4, each microwave radiation
Portion 6 is made up of the slit (elongated opening portion) of more than 2.As long as the long limit of at least one of which slit is relative to microwave
Direction of transfer X tilt shape.
Microwave radiation portion 6 shown in (a) of Fig. 4 has two slits and intersects and the X word of integration in central spot each other
Shape, is the shape that can reliably radiate circularly polarized wave with simple structure.Each slit tilts 45 relative to direction of transfer X
Spend and formed.In the case of this shape, if the central point that two slits are intersected at least deviates from the center P of waveguide 5,
Circularly polarized wave or elliptically polarized wave can be formed.
Two slits in the microwave radiation portion 6 shown in (b) of Fig. 4 tilt 45 degree relative to direction of transfer X and are formed, and are formed
For extending another slit from the center of a slit and the T-shaped shape of integration.
Two slits in the microwave radiation portion 6 shown in (c) of Fig. 4 tilt 45 degree relative to direction of transfer X and are formed, and are formed
For extending another slit from the end of a slit and the L-shaped shape of integration.
3 slits in the microwave radiation portion 6 shown in (d) of Fig. 4 relative to direction of transfer X tilt 45 degree and formed, with from
Each extend over out the mode of slit near the both ends of one slit, form.
Microwave radiation portion 6 shown in (e) of Fig. 4 is formed by two slits closely configured, and each slit is relative to biography
Direction X is sent to be formed obliquely.And it is perpendicular to one another to be configured to slit.
4 slits in the microwave radiation portion 6 shown in (f) of Fig. 4 are configured to radial, and each slit is relative to sender
Tilt 45 degree to X and formed.
As the shape in microwave radiation portion 6, as long as the shape of circularly polarized wave can be formed, as Fig. 4 (e) and
Shown in (f), can be the most Uncrossed shape of slit, or as shown in (d) of Fig. 4, it is also possible to it is by 3 slit one structures
The shape become.
[condition of the shape in microwave radiation portion]
In the microwave heating equipment of embodiment 1, as two shown in (a) by such as Fig. 4 slit, (elongated opens
Oral area divides) condition of optimum shape in the microwave radiation portion 6 of radiation circularly polarized wave that constitutes, following 3 points can be listed.
First be the long edge lengths of each slit be about more than 1/4 of the wavelength in pipe λ g in waveguide 5.Second point is
Two slit long limits perpendicular to one another and each slit tilt 45 ° relative to direction of transfer X.Be thirdly with waveguide 5
Direction of transfer X parallel and be axle through the straight line of the substantial center part in microwave radiation portion 6, do not become about this axial symmetry
Electric Field Distribution.
Such as, when transmitting microwave with TE10 pattern, electric field is with the central shaft extended along direction of transfer X of waveguide 5
(pipe axle: P) is that axis of symmetry is distributed.Accordingly, as the shape in the microwave radiation portion 6 of radiation circularly polarized wave, condition is arranged to,
About the central shaft (P) of the direction of transfer X in waveguide 5, do not become axial symmetry.
It addition, as the shape in microwave radiation portion 6, it is also possible to it is configured to slit (elongated opening portion) with off plumb
Mode is intersected obliquely.Such that make the microwave radiation portion 6 being there is the shape making X word lose shape, it is also possible to radiation circular polarization
Ripple, does not reduce the opening portion of the slit of radiation circularly polarized wave, but the center that slit can be made to intersect is leaned on further
The end of the width of nearly waveguide 5.It is as a result, it is possible to vertical with direction of transfer X and direction of an electric field Y at waveguide 5
The upper scope expanding microwave further in direction (width Z), it is not necessary to use the drive mechanism can be more uniformly to heated
Thing heats.
It addition, as shown in (e) and (f) of Fig. 4, when multiple slits being separated and be configured to L-shaped shape or T-shaped shape,
Can configure separated from one another for multiple slits.It addition, in (e) and (f) of Fig. 4, illustrate that slit vertically configures
Example, but, slit can not be vertical relation, it is also possible to tilts with about 30 degree.
It addition, as the shape of slit in microwave radiation portion 6, be not limited to rectangle.The corner of the opening portion of slit is permissible
It is made up of curved surface (R), it is also possible to be made up of tangent plane (C).By becoming such shape, it is possible to produce circularly polarized wave, and energy
Enough alleviate electric field to concentrate and realize efficient microwave heating.
As it has been described above, radiate opening of basic circularly polarized wave as being used in the microwave radiation portion 6 of radiation circularly polarized wave
Mouth-shaped, as long as the elongated hole opening of the short elongated slit profile in combination one direction length of at least two, perpendicular direction is i.e.
Can.
(embodiment 2)
Hereinafter, the microwave heating equipment of embodiments of the present invention 2 is illustrated.The microwave heating dress of embodiment 2
Put the difference from the microwave heating equipment of above-mentioned embodiment 1 and be the configuration in microwave radiation portion, other structures and embodiment party
The microwave heating equipment of formula 1 is identical.
Element phase in the explanation of following embodiment 2, to the microwave heating equipment having with embodiment 1
With function, the element identical symbol of mark of structure, it describes the explanation of application implementation mode 1 in detail.
Fig. 5 is the axonometric chart of the microwave oven of the microwave heating equipment being shown as embodiments of the present invention 2.Fig. 6 is ripple
The top view of conduit 5, it illustrates the microwave radiation portion 6 radiating circularly polarized wave in the microwave heating equipment of embodiment 2.
As it is shown in figure 5, the microwave oven as the microwave heating equipment 1 of embodiment 2 has: heating chamber 2, its storage is added
Hot thing；And mounting portion 3, its storage mounting heating object.And, in the underface of mounting portion 3, at the upper surface of waveguide 5,
At least be arranged on direction of transfer X the microwave radiation portion 6 of multiple microwave radiating circularly polarized wave in heating chamber 2.
As shown in Figure 5 and Figure 6, in the microwave heating equipment 1 of embodiment 2, at the upper surface of waveguide 5 (with heating
The surface that room 2 is relative) on, by the way of the direction of transfer X arrangement of waveguide 5, it is provided with multiple radiation in heating chamber 2
The microwave radiation portion 6 of the circularly polarized wave of roughly the same amount of radiation, as microwave radiation unit.By configuring microwave radiation in this wise
Portion 6, it is possible to the heating object within heating chamber 2 is realized uniform and efficient microwave heating.In fig. 6 it is shown that in the following example
Son: two microwave radiation portions 6 have predetermined space L(distance between centers), and the two microwave radiation portion 6 is from waveguide 5
Pipe axle P plumb line on deviation position, the direction of transfer X along waveguide 5 is set up in parallel.
It addition, in the microwave heating equipment of embodiment 2, as long as multiple microwave radiation portion 6 is at least on direction of transfer X
Being arranged, as microwave radiation portion 6, following structure is also contained in the structure of embodiment 2: not only at direction of transfer
On X, and it is also configured with multiple microwave radiation on the direction (width Z) vertical with direction of transfer X and direction of an electric field Y
Portion 6.
[waveguide]
It is transmitted in the microwave as microwave generating unit being made up of magnetron etc. using the waveguide 5 as waveguide portion
During the microwave produced in generator 4, by frequency and the electricity of waveguide 5 of the microwave produced from the microwave generator 4 used
Field direction Y(is with reference to Fig. 5) on size, the direction vertical with direction of transfer X and direction of an electric field Y limiting waveguide 5 is (wide
Degree direction Z) on the size of upper and lower bound.
This is because employ H ripple (TE ripple；The TE10 mould of transverse electric wave transmission (Transverse Electric Wave)
This transfer mode of formula, this TE10 pattern is typically to only exist magnetic field components on the tube axial direction of waveguide and there is not electric field
The transfer mode of composition.It addition, the transfer mode beyond TE10 pattern is not nearly all suitable for the waveguide of microwave heating equipment.
Then, use Fig. 7 that the rectangular waveguide 301 as representativeness waveguide being carried to microwave oven is illustrated.
Extend as it is shown in fig. 7, simplest common waveguide pipe is fixing rectangular cross-sectional (width a × highly b) along direction of transfer X
Cuboid.In the rectangular waveguide 301 of this cuboid, when setting microwave wavelength as λ, the width a of waveguide 301 is at (λ
>a>λ/2) and in the range of select, the height b of waveguide 301 selects in the range of (b<λ/2).It is known that by this wise
Select the width a and height b of rectangular waveguide 301, it is possible to allow rectangular waveguide 301 transmit microwave with TE10 pattern.
Herein, TE10 pattern refers to, in rectangular waveguide 301, only exist on the direction of transfer X of rectangular waveguide 301
Magnetic field components and there is not H ripple (the TE ripple of electric field component；Transverse electric wave transmit Transverse Electric Wave) biography
Send pattern.It addition, the transfer mode beyond TE10 pattern is not nearly all suitable in the microwave heating equipment 1 of embodiment 1
Waveguide 5.
The wavelength X of the microwave in microwave oven is about 120mm, typically in microwave oven, how 80～about 100mm scope
The width a of interior selection waveguide, in the range of 15～about 40mm, select height b.
In the rectangular waveguide 301 shown in Fig. 7, upper and lower surface is claimed by the implication on the surface of magnetic field vortex abreast
For H face 302, in the implication with the surface of field parallel, surface, left and right is referred to as E face 303.It addition, when setting microwave in waveguide
When wavelength in pipe when transmitting in pipe 301 is λ g, λ g is represented by following formula (1).
As the formula (1), although wavelength in pipe λ g according to the change in size of width a, but unrelated with the size of height b.
It addition, in TE10 pattern, the both sides end face (E face 303) at the width (Z) of rectangular waveguide 301 powers on
Field is 0, maximum at the central electric field of width (Z).Therefore, the microwave generator 4 such as magnetron is in the maximum waveguide of electric field
Central authorities' coupling of the width (Z) of pipe 5.
(embodiment 3)
Hereinafter, the microwave heating equipment of embodiments of the present invention 3 is illustrated.The microwave heating dress of embodiment 3
Put the difference from the microwave heating equipment of above-mentioned embodiment 1 and be configuration and the concrete structure in microwave radiation portion, other knots
Structure is identical with the microwave heating equipment of embodiment 1.
Element phase in the explanation of following embodiment 3, to the microwave heating equipment having with embodiment 1
With function, the element identical symbol of mark of structure, it describes the explanation of application implementation mode 1 in detail.
Fig. 8 is the axonometric chart of the microwave heating equipment illustrating embodiments of the present invention 3.Fig. 9 is the vertical view of waveguide 5
Figure, it illustrates the microwave radiation portion 6 radiating circularly polarized wave in the microwave heating equipment of embodiment 3.
As shown in Figure 8, the microwave oven as the microwave heating equipment 1 of embodiment 3 has: heating chamber 2, and its storage is added
Hot thing；And mounting portion 3, its storage mounting heating object.It addition, in the underface of mounting portion 3, at the upper surface of waveguide 5,
On direction of transfer X, at least it is disposed with multiple microwave radiating the roughly the same amount as circularly polarized wave in heating chamber
Microwave radiation portion 6.
It addition, in the microwave heating equipment of embodiment 3, radiate the microwave radiation portion 6 of circularly polarized wave in heating chamber 2
Being to make two slits (elongated opening portion) intersected with each other and be configured to X word shape, the long limit being configured to each slit is relative
Direction of transfer X in waveguide 5 tilts (45 degree).
As it is shown in figure 9, in the microwave heating equipment 1 of embodiment 3, be arranged on direction of transfer X multiple spoke
Penetrate the microwave radiation portion 6 of the X word shape of circularly polarized wave.As it has been described above, by configuring multiple microwave radiation portion 6, it is possible to heating
Heating object within room 2 realizes uniform and efficient microwave heating.
In fig. 9 it is shown that following example: the microwave radiation portion 6 of at least two X word shape has predetermined space L, and
The position that described microwave radiation portion 6 deviates on the plumb line from the pipe axle P of waveguide 5, along the direction of transfer of waveguide 5
X is set up in parallel.That is, in the example shown in Fig. 9, in multiple microwave radiation portions 6 of X word shape, linked slit and intersected
The line of point consistent with the direction of transfer X of waveguide 5.
It addition, in the microwave heating equipment of embodiment 3, as long as multiple microwave radiation portion 6 is at least on direction of transfer X
Being arranged, as microwave radiation portion 6, following situation is also contained in the present invention: not only on direction of transfer X, and
The direction (width Z) vertical with direction of transfer X and direction of an electric field Y is also configured with multiple microwave radiation portion 6.
In the structure of the microwave heating equipment of embodiment 3, also described above in embodiment 2 as explanation, make
With waveguide 5 transmit from the microwave that the microwave generator 4 as microwave generating unit being made up of magnetron etc. produces time, by
From use magnetron produce the frequency of microwave and the direction of an electric field Y of waveguide 5 size, limit waveguide 5 with
The size of the upper and lower bound on direction (width Z) vertical for direction of transfer X and direction of an electric field Y.
It addition, the condition of the shape as the microwave radiation portion 6 in embodiment 3, as above-mentioned embodiment 1 uses figure
As (a) of 4 is illustrated, the length (2p) of the slit (elongated opening portion) shown in Fig. 9 is to transmit in waveguide 5
About more than the 1/4 of the wavelength in pipe λ g of microwave, two slits are each other in central authorities' intersection of length direction, and each slit is relative
45 ° have been tilted in direction of transfer X.
And, the microwave radiation portion 6 being made up of two slits intersections is configured to, through the friendship of the slit in microwave radiation portion 6
Fork the axle parallel with direction of transfer X are not at the position making the Electric Field Distribution within waveguide 5 symmetrical.
Such as, when waveguide 5 transmits microwave with TE10 pattern, through direction of transfer X and electric field side with waveguide 5
The central authorities of the waveguide 5 on direction Z vertical for Y the pipe axle P extended along direction of transfer X are the electric fields within waveguide 5
The axis of symmetry of distribution.Therefore, in the structure of embodiment 3, the cross part of the slit in microwave radiation portion 6 is configured in from waveguide
The position of deviation on the plumb line of the pipe axle P of the axis of symmetry of pipe 5, i.e. waveguide 5.By configuring microwave radiation portion 6 in this wise
Slit, it is possible to allow microwave radiation portion 6 reliably radiate circularly polarized wave.
It addition, in multiple microwave radiation portions 6 of radiation circularly polarized wave, the interval in adjacent microwave radiation portion 6 is the narrowest, micro-
Electric field between wave radiation portion 6 is concentrated the strongest, and the loss of microwave is the biggest, and the efficiency of heating surface is the poorest.As adjacent microwave radiation portion
6, preferably configure with the interval of more than 5mm.Therefore, it is configured in the structure of embodiment 3, expands adjacent as much as possible
Interval on the width Z of waveguide 5, the microwave radiation portion 6.
In the microwave heating equipment 1 of embodiment 3 configured as described above, it is not necessary to arrange and make mounting table or antenna rotate
Mechanism and phase shifter etc., the heating object in heating chamber 2 can be realized uniform microwave heating.Therefore, embodiment 3
Being added when microwave heating equipment 1 has the heating action being prevented from when the fault of rotating mechanism and produce during abnormal operation
The structure heating unequal problem of hot thing.
It addition, in the structure of embodiment 3, produce from the microwave generators such as magnetron 4 being transmitted by waveguide 5
Microwave time, as in above-mentioned embodiment 1 explanation as, the microwave amount being radiated in heating chamber 2 from microwave radiation portion 6 according to
Three conditions and increase and decrease.
First condition be on direction of transfer X from microwave generator 4 to the distance in microwave radiation portion 6.Second bar
Part is the distance on direction of transfer X from the end face 15 of waveguide 5 to microwave radiation portion 6.3rd condition is at waveguide 5
In with direction of transfer X and direction of an electric field Y(with reference to Fig. 2) position on vertical direction (the width Z of waveguide 5).
On the basis of considering conditions above, if not configuring micro-in the way of the even microwave distribution in heating chamber 2
Wave radiation portion 6, even if then microwave radiation portion 6 being configured to about the central symmetry in heating chamber 2, heating chamber 2 in most cases
Interior microwave distribution is also uneven.
Therefore, in the microwave heating equipment 1 of the embodiment 3 on direction of transfer X with multiple microwave radiation portion 6, make
The technology of the microwave changes in distribution in heating chamber 2 is requisite.
(embodiment 4)
Hereinafter, the microwave heating equipment of embodiments of the present invention 4 is illustrated.The microwave heating dress of embodiment 4
Put the difference from the microwave heating equipment of above-mentioned embodiment 1 and be configuration and the concrete structure in microwave radiation portion, other knots
Structure is identical with the microwave heating equipment of embodiment 1.
Element phase in the explanation of following embodiment 4, to the microwave heating equipment having with embodiment 1
With function, the element identical symbol of mark of structure, it describes the explanation of application implementation mode 1 in detail.
Figure 10 is the top view of waveguide 5, it illustrates the radiation in the microwave heating equipment of embodiments of the present invention 4
The microwave radiation portion 6 of circularly polarized wave.
As shown in Figure 10, in the microwave heating equipment 1 of embodiment 4, at the upper surface of waveguide 5 (with heating chamber 2 phase
To surface) on, be at least arranged on direction of transfer X multiple microwave radiation radiating circularly polarized wave in heating chamber 2
Portion 6.
In the microwave heating equipment of embodiment 4, the microwave radiation portion 6 radiating circularly polarized wave in heating chamber 2 is to make
Two slits (elongated opening portion) are intersected with each other and are formed as X word shape, are configured to the long limit of each slit relative to ripple
The direction of transfer X of conduit 5 tilts (45 degree).The structure of embodiment 4 is: the slit length 2p in microwave radiation portion 6 is according to waveguide
The position on direction of transfer X in pipe 5 and different.In two shown in Figure 10 microwave radiation portion 6, it is shown that following example:
The microwave radiation portion 6(close with the microwave generating unit 4 as microwave generating unit being made up of magnetron is in Fig. 10 for right side
Microwave radiation portion) opening portion formed than the microwave radiation portion 6(away from microwave generating unit 4 micro-for left side in Fig. 10
Wave radiation portion) opening portion little, it is suppressed that the amount of radiation of microwave.
Constitute as described above, become such structure: by change multiple microwave radiation portions 6 configuration relation,
And slit length (aperture area) 2p in each microwave radiation portion 6, it is possible to control the amount of radiation of microwave.Therefore, embodiment party
The microwave heating equipment of formula 4 is configured to, it is possible to uniformly and efficiently to the heating object in heating chamber 2 carry out microwave heating.
It addition, in the microwave heating equipment 1 of embodiment 4, as long as multiple microwave radiation portion 6 is at least at direction of transfer X
On be arranged, as microwave radiation portion 6, following situation is also contained in the structure of embodiment 4: not only sender
On X, and it is also configured with multiple microwave spoke on the direction (width Z) vertical with direction of transfer X and direction of an electric field Y
Penetrate portion 6.
In the microwave heating equipment 1 of embodiment 4, about the relation with other design considerations, it is not limited to about heating
Central symmetry ground in room 2 configures multiple microwave radiation portions 6.Even if it addition, being configured with about the central symmetry in heating chamber 2
Multiple microwave radiation portions 6, owing to being provided with the various portions such as heater and door glass in the storehouse of the microwave heating equipments such as microwave oven 1
Part, the distribution of the microwave in heating chamber 2 is also uneven the most in most cases.
Therefore, in the microwave heating equipment of embodiment 4, not only change the configuration in multiple microwave radiation portion 6, Er Qiebian
The slit length 2p in more microwave radiation portion 6, ensures that the uniformity that the microwave in heating chamber 2 is distributed.
In general, in the microwave radiation portion 6 intersected by two slits, it is shortened by length 2p of slit, subtracts
The aperture area in little microwave radiation portion 6, so that the microwave amount being radiated in heating chamber 2 from microwave radiation portion 6 reduces.
Such as, in the waveguide 5 shown in Figure 10, when the microwave of right side area is distributed stronger, it is shortened by right side
The slit length 2p in microwave radiation portion 6, thus reduce the aperture area in the microwave radiation portion 6 on right side, decrease from right side
Microwave radiation portion 6 is radiated the microwave amount in heating chamber 2 so that from each microwave radiation portion 6 microwave amount of radiation substantially
Identical, it can be ensured that the uniformity of the microwave distribution in heating chamber 2.
As it has been described above, in the microwave heating equipment of embodiments of the present invention 4, multiple microwave radiation portions 6 be two narrow
Stitch the shape that intersected with each other and each slit long limit tilts relative to the direction of transfer X of waveguide 5, be configured to the long limit of slit
Length 2p is different according to the position on the direction of transfer in waveguide 5.Microwave heating dress at the embodiment 4 so constituted
In putting, the slit length 2p of configuration and microwave radiation portion 6 by changing microwave radiation portion 6 respectively, it is possible to control microwave radiation
Amount, it is possible to uniformly and efficiently to heating object carry out microwave heating.
It addition, in order to make the even microwave distribution in heating chamber 2, the structure in microwave radiation portion 6 is according to microwave heating equipment
Each specification, structure etc. and different.Therefore, by changing should be arranged on waveguide 5 according to each microwave heating equipment
The shape of slit in microwave radiation portion 6, it can be ensured that the uniformity of the microwave distribution in heating chamber 2.
In the structure of embodiment 4, also described above in embodiment 2 explanation as, use waveguide 5 transmit from
During the microwave that the microwave generators such as magnetron 4 produce, by the frequency of microwave produced from the magnetron used and waveguide 5
Size on direction of an electric field Y, limits the direction (width vertical with direction of transfer X and direction of an electric field Y of waveguide 5
The size of the upper and lower bound on Z).
It addition, the condition of the shape as the microwave radiation portion 6 in embodiment 4, as above-mentioned embodiment 1 uses figure
As (a) of 4 is illustrated, length 2p of the slit (elongated opening portion) shown in Figure 10 is to transmit in waveguide 5
About more than the 1/4 of the wavelength in pipe λ g of microwave, two slits are each other in central authorities' intersection of length direction, and each slit is relative
45 ° have been tilted in direction of transfer X.
And, the microwave radiation portion 6 being made up of two slits intersections is configured to, through the friendship of the slit in microwave radiation portion 6
Fork the axle parallel with direction of transfer X are not at the position making the Electric Field Distribution within waveguide 5 symmetrical.
Such as, when waveguide 5 transmits microwave with TE10 pattern, through direction of transfer X and electric field side with waveguide 5
The central authorities of the waveguide 5 on direction Z vertical for Y the pipe axle P extended along direction of transfer X are the electric fields within waveguide 5
The axis of symmetry of distribution.Therefore, in the structure of embodiment 4, the cross part of the slit in microwave radiation portion 6 is configured in from waveguide
The position of deviation on the plumb line of the pipe axle P of the axis of symmetry of pipe 5, i.e. waveguide 5.By configuring microwave radiation portion 6 in this wise
Slit, it is possible to allow microwave radiation portion 6 reliably radiate circularly polarized wave.
It addition, in multiple microwave radiation portions 6 of radiation circularly polarized wave, the interval in adjacent microwave radiation portion 6 is the narrowest, micro-
Electric field between wave radiation portion 6 is concentrated the strongest, and the loss of microwave is the biggest, and the efficiency of heating surface is the poorest.As adjacent microwave radiation portion
6, preferably configure with the interval of more than 5mm.Therefore, it is configured in the structure of embodiment 4, expands adjacent as much as possible
Interval on the width Z of waveguide 5, the microwave radiation portion 6.
It addition, in the structure of embodiment 4, produce from the microwave generators such as magnetron 4 being transmitted by waveguide 5
Microwave time, as in above-mentioned embodiment 1 explanation as, the microwave amount being radiated in heating chamber 2 from microwave radiation portion 6 according to
Three conditions and increase and decrease.
First condition be on direction of transfer X from microwave generator 4 to microwave radiation portion 6 distance.Second
Condition is the distance on direction of transfer X from the end face 15 of waveguide 5 to microwave radiation portion 6.3rd condition is in waveguide
With direction of transfer X and direction of an electric field Y(with reference to Fig. 2 in pipe 5) position on vertical direction (the width Z of waveguide 5).
On the basis of considering conditions above, if not configuring micro-in the way of the even microwave distribution in heating chamber 2
Wave radiation portion 6, even if then configuring microwave radiation portion about the central symmetry in heating chamber 2, in most cases in heating chamber 2
Microwave distribution is also uneven.
Therefore, in the microwave heating equipment 1 of the embodiment 4 on direction of transfer X with multiple microwave radiation portion 6, make
The technology of the microwave changes in distribution in heating chamber 2 is requisite.
(embodiment 5)
Hereinafter, the microwave heating equipment of embodiments of the present invention 5 is illustrated.The microwave heating dress of embodiment 5
Put the difference from the microwave heating equipment of above-mentioned embodiment 1 and be configuration and the concrete structure in microwave radiation portion, other knots
Structure is identical with the microwave heating equipment of embodiment 1.
Element phase in the explanation of following embodiment 5, to the microwave heating equipment having with embodiment 1
With function, the element identical symbol of mark of structure, it describes the explanation of application implementation mode 1 in detail.
Figure 11 is the top view of waveguide 5, it illustrates the radiation in the microwave heating equipment of embodiments of the present invention 5
The microwave radiation portion 6 of circularly polarized wave.
As shown in figure 11, in the microwave heating equipment 1 of embodiment 5, at the upper surface of waveguide 5 (with heating chamber 2 phase
To surface) on, be at least arranged on direction of transfer X multiple microwave radiation radiating circularly polarized wave in heating chamber 2
Portion 6.
In the microwave heating equipment of embodiment 5, in heating chamber 2, radiate circularly polarized wave (left-hand polarized wave or dextrorotation
Polarized wave) microwave radiation portion 6 be to make two slits (elongated opening portion) intersected with each other and be formed as X word shape, constitute
Long limit for each slit tilts (45 degree) relative to the direction of transfer X of waveguide 5.The structure of embodiment 5 is: microwave radiation
Slit width 2q in portion 6 is different according to the position on the direction of transfer X in waveguide 5.
In two shown in Figure 11 microwave radiation portion 6, it is shown that following example: produce with the microwave being made up of magnetron
The close microwave radiation portion 6(of device 4 is in fig. 11 for the microwave radiation portion on right side) opening portion formed to produce than from microwave
The remote microwave radiation portion 6(of generating apparatus 4 is the microwave radiation portion in left side in fig. 11) opening portion little, it is suppressed that the spoke of microwave
The amount of penetrating.
The microwave heating equipment of embodiment 5 configured as described above is configured to, by changing multiple microwave radiation portions 6
Slit width (aperture area) in configuration relation and each microwave radiation portion 6, it is possible to control the amount of radiation of microwave.Therefore,
In the microwave heating equipment of embodiment 5, it is possible to uniformly and efficiently the heating object in heating chamber 2 is carried out microwave and add
Heat.
It addition, in the microwave heating equipment of embodiment 5, as long as multiple microwave radiation portion 6 is at least on direction of transfer X
Being arranged, as microwave radiation portion 6, following structure is also contained in the structure of embodiment 5: not only at direction of transfer
On X, the direction (width Z) vertical with direction of transfer X and direction of an electric field Y is also configured with multiple microwave radiation portion 6.
In the microwave heating equipment 1 of embodiment 5, about the relation with other design considerations, it is not limited to about heating
Central symmetry ground in room 2 configures multiple microwave radiation portions 6.Even if it addition, being configured with about the central symmetry in heating chamber 2
Multiple microwave radiation portions 6, owing to being provided with the various portions such as heater and door glass in the storehouse of the microwave heating equipments such as microwave oven 1
Part, the distribution of the microwave in heating chamber 2 is also uneven the most in most cases.
Therefore, in the microwave heating equipment of embodiment 5, not only change the configuration in multiple microwave radiation portion 6, Er Qiebian
The slit width 2q in more microwave radiation portion 6, thus ensure that the uniformity that the microwave in heating chamber 2 is distributed.
In general, in the microwave radiation portion 6 intersected by two slits, it is shortened by the width 2q of slit, subtracts
The aperture area in little microwave radiation portion 6, so that the microwave amount being radiated in heating chamber 2 from microwave radiation portion 6 reduces.
Such as, when the microwave of the right side area (region close with microwave generator 4) in the waveguide 5 shown in Figure 11
When being distributed stronger, by increasing the slit width in 2 microwave radiation portions 6 of left field (region away from microwave generator 4)
2q, it is possible to increase the aperture area in the microwave radiation portion 6 of left field.Its result, adds the microwave radiation from left field
Portion 6 is radiated the microwave amount in heating chamber 2, it can be ensured that the uniformity of the microwave distribution in heating chamber 2.
In the structure of embodiment 5, also described above in embodiment 2 explanation as, use waveguide 5 transmit from
During the microwave that the microwave generators such as magnetron 4 produce, by the frequency of microwave produced from the magnetron used and waveguide 5
Size on direction of an electric field Y, limits the direction (width vertical with direction of transfer X and direction of an electric field Y of waveguide 5
The size of the upper and lower bound on Z).
It addition, the condition of the shape as the microwave radiation portion 6 in embodiment 5, as above-mentioned embodiment 1 uses figure
As (a) of 4 is illustrated, the length (2p) of the slit (elongated opening portion) shown in Figure 11 is to transmit in waveguide 5
Microwave wavelength in pipe λ g about more than 1/4, two slits are each other in central authorities' intersection of length direction, and each slit phase
45 ° have been tilted for direction of transfer X.
And, the microwave radiation portion 6 being made up of two slits intersections is configured to, through the friendship of the slit in microwave radiation portion 6
Fork the axle parallel with direction of transfer X are not at the position making the Electric Field Distribution within waveguide 5 symmetrical.
Such as, when waveguide 5 transmits microwave with TE10 pattern, the central authorities on the width Z of waveguide 5 edge
The pipe axle P direction of transfer X extension is the axis of symmetry of the Electric Field Distribution within waveguide 5.Therefore, in the structure of embodiment 5
In, the cross part of the slit in microwave radiation portion 6 is configured in the vertical of the pipe axle P of the axis of symmetry from waveguide 5, i.e. waveguide 5
The position of deviation on line.By configuring the slit in microwave radiation portion 6 in this wise, it is possible to allow microwave radiation portion 6 reliably radiate circle
Polarized wave.
It addition, in multiple microwave radiation portions 6 of radiation circularly polarized wave, the interval in adjacent microwave radiation portion 6 is the narrowest, micro-
Electric field between wave radiation portion 6 is concentrated the strongest, and the loss of microwave is the biggest, and the efficiency of heating surface is the poorest.As adjacent microwave radiation portion
6, preferably configure with the interval of more than 5mm.Therefore, it is configured in the structure of embodiment 5, expands adjacent as much as possible
Interval on the width Z of waveguide 5, the microwave radiation portion 6.
It addition, in the structure of embodiment 5, produce from the microwave generators such as magnetron 4 being transmitted by waveguide 5
Microwave time, as in above-mentioned embodiment 1 explanation as, the microwave amount being radiated in heating chamber 2 from microwave radiation portion 6 according to
Three conditions and increase and decrease.
First condition be on direction of transfer X from microwave generator 4 to microwave radiation portion 6 distance.Second
Condition is the distance on direction of transfer X from the end face 15 of waveguide 5 to microwave radiation portion 6.3rd condition is in waveguide
With direction of transfer X and direction of an electric field Y(with reference to Fig. 2 in pipe 5) position on vertical direction (the width Z of waveguide 5).
On the basis of considering conditions above, if not configuring micro-in the way of the even microwave distribution in heating chamber 2
Wave radiation portion 6, even if then configuring microwave radiation portion about the central symmetry in heating chamber 2, in most cases in heating chamber 2
Microwave distribution is also uneven.
Therefore, in the microwave heating equipment 1 of the embodiment 5 in the transmission direction with multiple microwave radiation portion 6, make to add
The technology of the microwave changes in distribution in hot cell 2 is requisite.
In the microwave heating equipment of embodiments of the present invention 5, multiple microwave radiation portions 6 are to make two slits hand over each other
The shape that the long limit of fork and each slit tilts relative to the direction of transfer X of waveguide 5, is configured to the width 2q of slit according to ripple
The position on direction of transfer X in conduit 5 and different.In the microwave heating equipment of the embodiment 5 so constituted, not only become
The more configuration in microwave radiation portion 6, but also change the slit width 2q in microwave radiation portion 6, it is possible to change in heating chamber 2
Microwave is distributed, it can be ensured that the uniformity of the microwave distribution in heating chamber 2.
(embodiment 6)
Hereinafter, the microwave heating equipment of embodiments of the present invention 6 is illustrated.The microwave heating dress of embodiment 6
Put the difference from the microwave heating equipment of above-mentioned embodiment 1 and be configuration and the concrete structure in microwave radiation portion, other knots
Structure is identical with the microwave heating equipment of embodiment 1.
Element phase in the explanation of following embodiment 6, to the microwave heating equipment having with embodiment 1
With function, the element identical symbol of mark of structure, it describes the explanation of application implementation mode 1 in detail.
Figure 12 is the top view of waveguide 5, it illustrates the radiation in the microwave heating equipment of embodiments of the present invention 6
The microwave radiation portion 6 of circularly polarized wave.
As shown in figure 12, in the microwave heating equipment 1 of embodiment 6, at the upper surface of waveguide 5 (with heating chamber 2 phase
To surface) on, be at least arranged on direction of transfer X multiple microwave radiation radiating circularly polarized wave in heating chamber 2
Portion 6.
In the microwave heating equipment 1 of embodiment 6, the microwave radiation portion 6 radiating circularly polarized wave in heating chamber 2 is to make
Two slits (elongated opening portion) are intersected with each other and are formed as X word shape, are configured to the long limit of each slit relative to ripple
Direction of transfer X in conduit 5 tilts (45 degree).The microwave heating equipment 1 of embodiment 6 is in microwave radiation portion 6 in shape, right
Cross section 12(Figure 12 reference) corner carried out R chamfer machining or C chamfer machining.
The microwave heating equipment 1 of embodiment 6 configured as described above can reduce the microwave in microwave radiation portion 6 to be damaged
Lose, it is possible to efficiently heating object is carried out microwave heating.
Microwave has the character in the segment set of corner or the point of end.Therefore, by two slits intersected with each other and
In the microwave radiation portion 6 constituted, in the case of its cross part office has the shape of point, the electric field caused by microwave can be produced
Concentrate, there is the problem that the efficiency of heating surface reduces.
Therefore, in the microwave heating equipment 1 of embodiment 6, to microwave spoke that is intersected with each other by two slits and that constitute
The corner section penetrating the cross section 12 in portion 6 implements R chamfer machining or C chamfer machining, thus alleviates the concentration of electric field, energy
Enough improve the efficiency of heating surface.
(embodiment 7)
Hereinafter, the microwave heating equipment of embodiments of the present invention 7 is illustrated.The microwave heating dress of embodiment 7
Put the difference from the microwave heating equipment of above-mentioned embodiment 1 and be configuration and the concrete structure in microwave radiation portion, other knots
Structure is identical with the microwave heating equipment of embodiment 1.
Element phase in the explanation of following embodiment 7, to the microwave heating equipment having with embodiment 1
With function, the element identical symbol of mark of structure, it describes the explanation of application implementation mode 1 in detail.
Figure 13 is the top view of waveguide 5, it illustrates the radiation in the microwave heating equipment of embodiments of the present invention 7
The microwave radiation portion 6 of circularly polarized wave.
As shown in figure 13, in the microwave heating equipment 1 of embodiment 7, at the upper surface of waveguide 5 (with heating chamber 2 phase
To surface) on, be at least arranged on direction of transfer X multiple microwave radiation radiating circularly polarized wave in heating chamber 2
Portion 6.
In the microwave heating equipment 1 of embodiment 7, the microwave radiation portion 6 radiating circularly polarized wave in heating chamber 2 is to make
Two slits (elongated opening portion) are intersected with each other and are formed as X word shape, are configured to the long limit of each slit relative to ripple
Direction of transfer X in conduit 5 tilts (45 degree).The microwave heating equipment 1 of embodiment 7 is in microwave radiation portion 6 in shape, right
The end section 13 of each slit has carried out R chamfer machining or C chamfer machining.
The microwave heating equipment 1 of embodiment 7 configured as described above can reduce the microwave in microwave radiation portion 6 to be damaged
Lose, it is possible to efficiently heating object is carried out microwave heating.
Microwave has the character in the segment set of corner or the point of end.Therefore, by two slits intersected with each other and
In the microwave radiation portion constituted, in the case of the end section 13 of slit has slightly pointed shape, can produce and be caused by microwave
Electric field is concentrated, and there is the problem that the efficiency of heating surface reduces.
Therefore, in the microwave heating equipment 1 of embodiment 7, to microwave spoke that is intersected with each other by two slits and that constitute
The end section 13 penetrating the slit in portion 6 has carried out R chamfer machining or C chamfer machining, therefore alleviates electric field and concentrates, improves
The efficiency of heating surface.
It addition, Figure 14 is the figure of the concrete structure illustrating the microwave radiation portion 6 in above-mentioned embodiment 6 and embodiment 7,
Show and make two slits (elongated opening portion) intersected with each other and be formed as an example in the microwave radiation portion 6 of X word shape.
As shown in figure 14, it is shown that the cross section 12 of the slit in microwave radiation portion 6 is implemented R chamfer machining or C
The example of chamfer machining, it is shown that the end section 13 of slit is implemented R chamfer machining or the example of C chamfer machining.At this
In invention, if the cross section 12 of slit and end section 13 are carried out any one in R chamfer machining or C chamfer machining
Processing, then can alleviate electric field and concentrate, it is possible to realize the raising of the efficiency of heating surface.
(embodiment 8)
Hereinafter, the microwave heating equipment of embodiments of the present invention 8 is illustrated.The microwave heating dress of embodiment 8
Put the difference from the microwave heating equipment of above-mentioned embodiment 1 and be configuration and the concrete structure in microwave radiation portion, other knots
Structure is identical with the microwave heating equipment of embodiment 1.
Element phase in the explanation of following embodiment 8, to the microwave heating equipment having with embodiment 1
With function, the element identical symbol of mark of structure, it describes the explanation of application implementation mode 1 in detail.
Figure 15 is the top view of waveguide 5, it illustrates the radiation in the microwave heating equipment of embodiments of the present invention 8
The microwave radiation portion 6 of circularly polarized wave.
As shown in figure 15, in the microwave heating equipment 1 of embodiment 8, at least have multiple to adding on direction of transfer X
The microwave radiation portion 6 of radiation circularly polarized wave in hot cell 2.
Microwave radiation portion 6 is to make two slits intersected with each other and the long limit of each slit is relative to the transmission in waveguide 5
The shape that direction X tilts.In the structure shown in Figure 15, on direction of transfer X, two microwave radiation portions 6 on the right side of arrangement have
Have a structure as described below: from the microwave generator 4 as microwave generating unit position is set transmitting range length micro-
Wave radiation portion 6(be positioned at Figure 15 central authorities microwave radiation portion) with from microwave generator 4 position is set transmitting range
Short microwave radiation portion 6(is positioned at the microwave radiation portion of the right-hand member of Figure 15) compare, from waveguide 5 to the microwave radiation of heating chamber 2
Rate is high.It addition, in the structure of embodiment 8, on direction of transfer X, multiple microwave radiation portions 6 of arrangement can also be configured to:
From microwave generator 4 position is set transmitting range length microwave radiation portion 6 with from microwave generator 4, position is set
The short microwave radiation portion 6 of the transmitting range put compares, and from waveguide 5, the microwave emissivity to heating chamber 2 uprises successively.
By structure as above, give off roughly the same microwave from each microwave radiation portion 6, in heating chamber 2
The heating object in portion carries out uniform microwave heating, it is possible to efficiently heating object is carried out microwave heating.Herein, radiance is
The microwave radiation amount radiated from each microwave radiation portion 6 is relative to the ratio of the microwave transmission amount transmitted in the inside of waveguide 5.
It addition, in the microwave heating equipment 1 of embodiment 8, as long as multiple microwave radiation portion 6 is at least at direction of transfer X
On be arranged, as microwave radiation portion 6, following situation is also contained in the structure of embodiment 8: not only sender
On X, and it is also configured with multiple microwave spoke on the direction (width Z) vertical with direction of transfer X and direction of an electric field Y
Penetrate portion 6.
In the microwave heating equipment 1 of embodiment 8, about the relation with other design considerations, it is not limited to about heating
Central symmetry ground in room 2 configures multiple microwave radiation portions 6.Even if it addition, being configured with about the central symmetry in heating chamber 2
Multiple microwave radiation portions 6, owing to being provided with the various portions such as heater and door glass in the storehouse of the microwave heating equipments such as microwave oven 1
Part, the distribution of the microwave in heating chamber 2 is also uneven the most in most cases.
It addition, generally, in the case of direction of transfer X has multiple microwave radiation portion 6, even if from each microwave radiation
Waveguide 5 in portion 6 is identical to the microwave emissivity of heating chamber 2, be also from microwave generator 4 position is set transmission
More microwave is radiated apart from short microwave radiation portion 6.
Its result, even if configuring multiple microwave radiation portion 6 about the central symmetry in heating chamber 2, micro-in heating chamber 2
Wavelength-division cloth is the most uneven, when microwave heating is cooked, can produce heating inequality on the heating object in heating chamber 2.
This is because: be by from microwave generator 4 position is set the short microwave radiation portion 6 of transmitting range open
Beginning, radiate microwave successively in heating chamber 2, hence along the direction of transfer X of waveguide 5, the conveying capacity of microwave reduces successively.
Therefore, in the microwave heating equipment of embodiment 8, not only change the configuration in multiple microwave radiation portion 6, Er Qiegai
Become waveguide 5 from each microwave radiation portion 6 to the microwave emissivity of heating chamber 2, it is possible to guarantee the microwave in heating chamber 2
The reliable uniformity of distribution.
As it has been described above, in the microwave heating equipment of embodiment 8, microwave radiation portion 6 is to make two slits (elongated opens
Oral area divides) shape that tilts relative to the direction of transfer X in waveguide 5 of the long limit of intersected with each other and each slit.As change
The example of the radiance in the microwave radiation portion 6 constituted in this wise, can enumerate following example: by changing the length of slit
(2p) aperture area of radiation microwave or the width (2q) of slit, is increased and decreased.
Such as, as shown in figure 16, on the upper surface (surface relative with heating chamber 2) of rectangular-shaped waveguide 5, arrange
Two are listed on direction of transfer X the microwave radiation portion 6 formed a line, and are provided with three and are listed in and direction of transfer X and direction of an electric field Y
The microwave radiation portion 6 formed a line on vertical direction (width Z), say, that be provided with 6 microwave radiation portions of total
6.By being provided with the rectangular waveguide 5 in 6 microwave radiation portions 6 in this wise, transmit microwave.
Formula (1) shown below is the formula of degree of coupling Cu asking for cross directional coupler.To according to asking for cross orientation
The formula (1) of degree of coupling Cu of bonder determines that the method for the shape in microwave radiation portion 6 illustrates.
It addition, in the microwave heating equipment of embodiments of the present invention 8, degree of coupling Cu of cross directional coupler refers to
From the waveguide 5 in each microwave radiation portion 6 to the microwave emissivity of heating chamber 2.
Wherein, the parameters (with reference to Fig. 7 and Fig. 9) in above formula (1) is defined as follows.
Long limit (A) size [mm] of a: rectangular waveguide 5
Minor face (B) size [mm] of b: rectangular waveguide 5
The 1/2(major radius of the length (2p) of p: slit) [mm]
The short radius of 1/2(of the width (2q) of q: slit) [mm]
The thickness of slab [mm] of t: waveguide faying face
λ g: wavelength in pipe [mm]
λ: the wavelength [mm] in free space
X0: the pipe axle of waveguide 5 and the distance between centers [mm] in microwave radiation portion 6
The frequency of oscillation [Hz] of f: microwave generating unit 4
The resonant frequency of fr=c/ (4p-1.092q) fr: slit (set p > > q) [Hz]
C: the light velocity (3 × 1011) [mm]
M=πp3/3[loge(4p/q) polarizability () of the long axis direction of-1] M: slit
In above formula (1), as the condition for realizing the most even efficient microwave heating to heating object, Ke Yikao
Consider following condition: in heating chamber 2, radiate same amount of microwave from each microwave radiation portion 6；And produce from microwave generator 4
Raw advancing wave is all radiated in heating chamber 2, say, that do not produce echo on the end face 15 of waveguide 5.
Therefore, under these conditions, when the number in microwave radiation portion 6 is 6, as long as from each microwave radiation portion 6
Relative to the microwave amount produced from microwave generator 4 about 16.7% microwave radiation in heating chamber 2.
It addition, in the microwave heating equipment of embodiments of the present invention 8, as an example, to setting as follows
State parameters, and only change each respective slit length in microwave radiation portion 6, thus adjust each microwave radiation portion 6
The situation of radiance illustrate.
Such as, the parameters in formula (1) is set as follows to determine the length of slit.
Long limit (A) size=100.0mm of a: rectangular waveguide
Minor face (B) size=30.0mm of b: rectangular waveguide
The short radius of 1/2(of the width of q: slit)=5.0mm
Thickness of slab=the 1.0mm of t: waveguide faying face
λ g: wavelength in pipe=154.7mm
λ: the wavelength=122.4mm in free space
X0: the pipe axle of waveguide 5 and the distance between centers=25.0mm in microwave radiation portion 6
F: frequency of oscillation=2450 × 10 of microwave generating unit 46Hz
For from microwave generator 4 position is set the identical microwave radiation portion 6 of transmitting range, it is required that right
The microwave emissivity of heating chamber 2 is identical.Now, each microwave radiation portion 6 each radiates microwave generator 4 in heating chamber 2
The microwave of about the 16.7% of the microwave amount of middle generation.Supplementing, the formula (1) of cross directional coupler is to have 2 microwaves herein
Formula during Department of Radiation.Therefore, as long as setting slit length as follows: by arranging position from microwave generator 4
A short side starts for the transmitting range put, and the radiance in each two microwave radiation portion 6 is followed successively by 4.8dB(i.e., initial two
Radiation 33.4%=16.7% × 2, microwave radiation portion), in 3.0dB(ensuing two microwave radiation portions radiation residue 50%),
0dB(latter two microwave radiation portion radiation remaining all, i.e. 100%).Therefore, by formula (1), by from microwave generator 4
The side that it is short that the transmitting range risen position is set start, the slit length 2p in each microwave radiation portion 6 be 53.6mm,
55.0mm、57.0mm。
It addition, in the microwave heating equipment of embodiments of the present invention 8, although the quantity to microwave radiation portion 6 is 6
Situation be illustrated, but the invention is not restricted to the situation of 6, as long as having multiple microwave radiation on direction of transfer X
Portion 6 just can apply.
It addition, in the microwave heating equipment of embodiment 8, to the slit length only changing each microwave radiation portion 6
The structure of the radiance that 2p adjusts each microwave radiation portion 6 is illustrated, but is not limited to this structure.The present invention also wraps
Include and change above-mentioned rectangular waveguide 301(with reference to Fig. 7) long limit (A) size, minor face (B) size of rectangular waveguide, slit
Other parameters such as the length of the 1/2 of width adjust the structure of the radiance in each microwave radiation portion 6.
It addition, when from each microwave radiation portion 6 to the microwave radiation amount of heating chamber 2 uneven time, such as, at direction of transfer
There is on X multiple microwave radiation portion 6, and wish by from microwave generator 4 position is set transmitting range length micro-
Wave radiation portion 6 starts to radiate successively in the situation of multiple microwave etc., can be adjusted by changing parameter.
And, the part at the advancing wave produced from microwave generator 4 is not radiated in heating chamber 2, and in waveguide
In situation creating echo on the end face 15 of pipe etc., need to consider that this echo is adjusted to change parameter, make
Must be uniform to the microwave radiation amount of heating chamber 2 from microwave radiation portion 6
(embodiment 9)
Hereinafter, the microwave heating equipment of embodiments of the present invention 9 is illustrated.The microwave heating dress of embodiment 9
Put the difference from the microwave heating equipment of above-mentioned embodiment 1 and be the configuration in microwave radiation portion, other structures and embodiment party
The microwave heating equipment of formula 1 is identical.
Element phase in the explanation of following embodiment 9, to the microwave heating equipment having with embodiment 1
With function, the element identical symbol of mark of structure, it describes the explanation of application implementation mode 1 in detail.
Figure 17 is the axonometric chart of the microwave oven of the microwave heating equipment being shown as embodiments of the present invention 9.Figure 18 is
The top view of waveguide 5, it illustrates radiation circularly polarized wave in the microwave heating equipment of embodiment 9 (left-hand polarized wave or
Right-handed polarized wave) microwave radiation portion 6.
As shown in figure 17, the microwave oven as the microwave heating equipment 1 of embodiment 9 has: adding of storage heating object
Hot cell 2, is provided with the door 7 with window before this heating chamber 2；And the mounting portion 3 of nonmetallic materials, its storage mounting quilt
Heating thing.
And, there is the microwave radiation unit radiating microwave in heating chamber 2 in the underface of mounting portion 3.As enforcement
Microwave radiation unit in mode 9, in the direction (width Z) vertical with direction of transfer X and direction of an electric field Y, upper arrangement sets
It is equipped with multiple microwave radiation portion 6 radiating circularly polarized wave (left-hand polarized wave or right-handed polarized wave) in heating chamber 2.
As shown in figure 18, in the microwave heating equipment 1 of embodiment 9, by waveguide 5 with direction of transfer X with
And multiple radiation circularly polarized wave (left-hand polarized wave in heating chamber 2 is set on the direction (width Z) that direction of an electric field Y is vertical
Or right-handed polarized wave) microwave radiation portion 6, it is possible to uniformly and efficiently to the heating object in heating chamber 2 carry out microwave heating.
It addition, in the microwave heating equipment of embodiment 9, if multiple microwave radiation portion 6 at least with direction of transfer X
And be arranged on the vertical direction Z of direction of an electric field Y, as microwave radiation portion 6, following structure is also contained in embodiment party
In the structure of formula 9: not only on the direction (width Z) vertical with direction of transfer X and direction of an electric field Y, and transmitting
Direction X is also configured with multiple microwave radiation portion 6.
(embodiment 10)
Hereinafter, the microwave heating equipment of embodiments of the present invention 10 is illustrated.The microwave heating of embodiment 10
The device difference from the microwave heating equipment of above-mentioned embodiment 1 is configuration and the concrete structure in microwave radiation portion, other
Structure is identical with the microwave heating equipment of embodiment 1.
Element in the explanation of following embodiment 10, to the microwave heating equipment having with embodiment 1
Identical function, the element of structure mark identical symbol, and it describes the explanation of application implementation mode 1 in detail.
Figure 19 is the axonometric chart of the microwave heating equipment illustrating embodiments of the present invention 10.Figure 20 is bowing of waveguide 5
View, it illustrates the radiation circularly polarized wave (left-hand polarized wave or right-handed polarized wave) in the microwave heating equipment of embodiment 10
Microwave radiation portion 6.
As shown in figure 19, the microwave oven as the microwave heating equipment 1 of embodiment 10 has: adding of storage heating object
Hot cell 2, is provided with the door 7 with window before this heating chamber 2；And the mounting portion 3 of nonmetallic materials, its storage mounting quilt
Heating thing.It addition, in the underface of mounting portion 3, (left-hand polarized wave or dextrorotation are inclined to have radiation circularly polarized wave in heating chamber 2
Shake ripple) the microwave radiation portion 6 of microwave.At least spread configuration on the direction Z vertical with direction of transfer X and direction of an electric field Y
There is multiple microwave radiation portion 6 radiating circularly polarized wave in heating chamber 2.
It addition, in the microwave heating equipment of embodiment 10, radiate the microwave radiation portion of circularly polarized wave in heating chamber 2
6 is to make two slits (elongated opening portion) intersected with each other and be formed as X word shape, and the long limit being configured to each slit is relative
Direction of transfer X in waveguide 5 tilts (45 degree).
As shown in figure 20, in the microwave heating equipment 1 of embodiment 10, at least with direction of transfer X and electric field side
Be arranged on direction (width Z) vertical for Y multiple microwave radiation radiating circularly polarized wave in microwave heating chamber 2
Portion 6.By configuring multiple microwave radiation portion 6 in this wise, it is possible to the heating object in heating chamber 2 is realized uniform and the most micro-
Wave heating.
In fig. 20, the lead of the microwave radiation portion 6 of at least two X word shape pipe axle P in waveguide 5 at a predetermined interval
Both sides on straight line, are arranged in the position of symmetry.That is, two microwave radiation portions 6 arrange on the width Z of waveguide 5
Arrange.In the example shown in Figure 20, linked in two microwave radiation portions 6 of X word shape the line of the point that slit intersects with
The width Z of waveguide 5 is consistent.
It addition, in the microwave heating equipment of embodiment 10, about multiple microwave radiation portions 6, if at least with biography
Send multiple microwave radiation portion 6 that is arranged on direction (width Z) vertical for direction X and direction of an electric field Y, following feelings
Condition is also contained in the present invention: not only on width Z, and is also configured with multiple microwave radiation portion on direction of transfer X
6。
In the structure of the microwave heating equipment of embodiment 10, also described above in embodiment 2 as explanation, make
With waveguide 5 transmit from the microwave that the microwave generator 4 being made up of magnetron etc. produces time, by from use magnetron produce
Size in the raw frequency of microwave and the direction of an electric field Y of waveguide 5, limit waveguide 5 with direction of transfer X and electric field
The size of the upper and lower bound on direction (width Z) vertical for direction Y.
It addition, the condition of the shape as the microwave radiation portion 6 in embodiment 10, as above-mentioned embodiment 1 uses
As (a) of Fig. 4 is illustrated, the length (2p) of the slit (elongated opening portion) shown in Figure 20 is to pass in waveguide 5
About more than the 1/4 of the wavelength in pipe λ g of the microwave sent, two slits are each other in central authorities' intersection of length direction, and each slit
45 ° have been tilted relative to direction of transfer X.
And, the microwave radiation portion 6 being made up of two slits intersections is configured to, through the friendship of the slit in microwave radiation portion 6
Fork the axle parallel with direction of transfer X and make the position (pipe axle) that the Electric Field Distribution within waveguide 5 is symmetrical inconsistent.
Such as, when transmitting microwave with TE01 pattern, to hang down through the direction of transfer X and direction of an electric field Y with waveguide 5
, there is the Electric Field Distribution along direction of transfer X extension in the mode of the central authorities of the straight waveguide 5 on direction (width Z)
Axis of symmetry (pipe axle P).Therefore, the middle position deviation that the cross part of slit is necessarily placed at from the width Z of waveguide 5
Position.
Such as, when waveguide 5 transmits microwave with TE10 pattern, through direction of transfer X and electric field side with waveguide 5
The central authorities of the waveguide 5 on direction Z vertical for Y the pipe axle P extended along direction of transfer X are the electric fields within waveguide 5
The axis of symmetry of distribution.Therefore, in the structure of embodiment 10, the cross part of the slit in microwave radiation portion 6 is configured in from ripple
The position of deviation on the plumb line of the pipe axle P of the axis of symmetry of conduit 5, i.e. waveguide 5.By configuring microwave radiation portion 6 in this wise,
Microwave radiation portion 6 can be allowed reliably to radiate circularly polarized wave (left-hand polarized wave or right-handed polarized wave).
It addition, in multiple microwave radiation portions 6 of radiation circularly polarized wave, the interval in adjacent microwave radiation portion 6 is the narrowest, micro-
Electric field between wave radiation portion 6 is concentrated the strongest, and the loss of microwave is the biggest, and the efficiency of heating surface is the poorest.As adjacent microwave radiation portion
6, preferably configure with the interval of more than 5mm.Therefore, it is configured in the structure of embodiment 10, expands phase as much as possible
Interval on the width Z of waveguide 5, the adjacent microwave radiation portion 6.
In the microwave heating equipment 1 of embodiment 10 configured as described above, it is not necessary to arrange and make mounting table or antenna rotation
The mechanism turned and phase shifter etc., the heating object of heating chamber 2 can be realized uniform microwave heating.Therefore, at embodiment
In the microwave heating equipment 1 of 10, it is possible to be reliably prevented when the fault of rotating mechanism and the heating that produces during abnormal operation is moved
The unequal problem of heating of heating object when making.
(embodiment 11)
Hereinafter, the microwave heating equipment of embodiments of the present invention 11 is illustrated.The microwave heating of embodiment 11
The device difference from the microwave heating equipment of above-mentioned embodiment 1 is configuration and the concrete structure in microwave radiation portion, other
Structure is identical with the microwave heating equipment of embodiment 1.
Element in the explanation of following embodiment 11, to the microwave heating equipment having with embodiment 1
Identical function, the element of structure mark identical symbol, and it describes the explanation of application implementation mode 1 in detail.
Figure 21 is the top view of waveguide 5, it illustrates the spoke in the microwave heating equipment of embodiments of the present invention 11
Penetrate the microwave radiation portion 6 of circularly polarized wave (left-hand polarized wave or right-handed polarized wave).
As shown in figure 21, in the microwave heating equipment 1 of embodiment 11, at the upper surface of waveguide 5 (with heating chamber 2
Relative surface) on, at least it is arranged on the direction (width Z) vertical with direction of transfer X and direction of an electric field Y
Multiple microwave radiation portions 6 radiating circularly polarized wave in heating chamber 2.
In the microwave heating equipment of embodiment 11, the microwave radiation portion 6 radiating circularly polarized wave in heating chamber 2 is to make
Two slits are intersected with each other and are formed as X word shape, are configured to the long limit of each slit relative to the direction of transfer in waveguide 5
X tilts (45 degree).The structure of embodiment 11 is as follows: the slit length 2p in microwave radiation portion 6 according in waveguide 5 with transmission
The position on direction (width Z) vertical for direction X and direction of an electric field Y and different.
The microwave heating equipment of embodiment 11 configured as described above is configured to, by changing multiple microwave radiation portions 6
Configuration relation and each microwave radiation portion 6 in the length 2p(aperture area of slit), it is possible to control the radiation of microwave
Amount.Therefore, in the microwave heating equipment of embodiment 11, it is possible to uniformly and efficiently to the heating object in heating chamber 2 enter
Row microwave heating.
It addition, in the microwave heating equipment 1 of embodiment 11, as long as have at least width Z of waveguide 5
Having the structure in multiple microwave radiation portion 6, as microwave radiation portion 6, following structure is also contained in the structure of embodiment 11
In: not only on width Z, and on direction of transfer X, it is also configured with multiple microwave radiation portion 6.
In the microwave heating equipment 1 of embodiment 11, about the relation with other design considerations, it is not limited to about heating
Central symmetry ground in room 2 configures multiple microwave radiation portions 6.Even if it addition, being configured with about the central symmetry in heating chamber 2
Multiple microwave radiation portions 6, owing to being provided with the various portions such as heater and door glass in the storehouse of the microwave heating equipments such as microwave oven 1
Part, the distribution of the microwave in heating chamber 2 is also uneven the most in most cases.
Therefore, in the microwave heating equipment of embodiment 11, not only change the configuration in multiple microwave radiation portion 6, and
The slit length 2p in change microwave radiation portion 6, thus ensure that the uniformity that the microwave in heating chamber 2 is distributed.
In general, in the microwave radiation portion 6 intersected by two slits, it is shortened by length 2p of slit, subtracts
The aperture area in little microwave radiation portion 6, so that the microwave amount being radiated in heating chamber 2 from microwave radiation portion 6 reduces.
Such as, as (towards direction of transfer region on the right side: the Figure 21 of rear side region in the waveguide 5 shown in Figure 21
Upside) microwave distribution strong time, shorten the microwave radiation portion 6 intersected by two slits in the rear side region of Figure 21
Slit length 2p, reduces the aperture area in microwave radiation portion 6.Its result, decreases microwave radiation portion 6 spoke from rear side region
The microwave amount being mapped in heating chamber 2 so that roughly the same from the microwave radiation amount in each microwave radiation portion 6, it can be ensured that to add
The uniformity of the microwave distribution in hot cell 2.
As it has been described above, the microwave heating equipment of embodiments of the present invention 11 is configured to, multiple microwave radiation portions 6 are to make two
The shape that individual slit long limit intersected with each other and each slit tilts relative to the direction of transfer X in waveguide 5, the long limit of slit
Length 2p is different according to the position on the direction Z vertical from direction of transfer X and direction of an electric field Y in waveguide 5.So structure
The microwave heating equipment of the embodiment 11 become uniformly and efficiently to heating object can carry out microwave heating.
In the structure of embodiment 11, also described above in embodiment 2 as explanation, transmit using waveguide 5
When the microwave that the microwave generator 4 being made up of magnetron etc. produces, by the frequency of the microwave produced from the magnetron used
With the size on the direction of an electric field Y of waveguide 5, limit the side vertical with direction of transfer X and direction of an electric field Y of waveguide 5
The size of the upper and lower bound on (width Z).
It addition, the condition of the shape as the microwave radiation portion 6 in embodiment 11, as above-mentioned embodiment 1 uses
As (a) of Fig. 4 is illustrated, the length (2p) of the slit (elongated opening portion) shown in Figure 21 is to pass in waveguide 5
About more than the 1/4 of the wavelength in pipe λ g of the microwave sent, two slits are each other in central authorities' intersection of length direction, and each slit
45 ° have been tilted relative to direction of transfer X.
And, the microwave radiation portion 6 being made up of two slits intersections is configured to, through the friendship of the slit in microwave radiation portion 6
Fork the axle parallel with direction of transfer X are not at the position making the Electric Field Distribution within waveguide 5 symmetrical.
Such as, when waveguide 5 transmits microwave with TE10 pattern, through direction of transfer X and electric field side with waveguide 5
The central authorities of the waveguide 5 on direction Z vertical for Y the pipe axle P extended along direction of transfer X are that the electric field in waveguide 5 divides
The axis of symmetry of cloth.Therefore, in the structure of embodiment 11, the cross part of the slit in microwave radiation portion 6 is configured in from waveguide
The position of deviation on the plumb line of the pipe axle P of the axis of symmetry of pipe 5, i.e. waveguide 5.By configuring microwave radiation portion 6 in this wise
Slit, it is possible to allow microwave radiation portion 6 reliably radiate circularly polarized wave (left-hand polarized wave or right-handed polarized wave).
It addition, in multiple microwave radiation portions 6 of radiation circularly polarized wave, the interval in adjacent microwave radiation portion 6 is the narrowest, micro-
Electric field between wave radiation portion 6 is concentrated the strongest, and the loss of microwave is the biggest, and the efficiency of heating surface is the poorest.As adjacent microwave radiation portion
6, preferably configure with the interval of more than 5mm.Therefore, it is configured in the structure of embodiment 11, expands phase as much as possible
Interval on the width Z of waveguide 5, the adjacent microwave radiation portion 6.
(embodiment 12)
Hereinafter, the microwave heating equipment of embodiments of the present invention 12 is illustrated.The microwave heating of embodiment 12
The device difference from the microwave heating equipment of above-mentioned embodiment 1 is configuration and the concrete structure in microwave radiation portion, other
Structure is identical with the microwave heating equipment of embodiment 1.
Element in the explanation of following embodiment 12, to the microwave heating equipment having with embodiment 1
Identical function, the element of structure mark identical symbol, and it describes the explanation of application implementation mode 1 in detail.
Figure 22 is the top view of waveguide 5, it illustrates the spoke in the microwave heating equipment of embodiments of the present invention 12
Penetrate the microwave radiation portion 6 of circularly polarized wave (left-hand polarized wave or right-handed polarized wave).
As shown in figure 22, in the microwave heating equipment 1 of embodiment 12, at least with direction of transfer X and electric field side
Be arranged on direction Z vertical for Y multiple radiation circularly polarized wave (left-hand polarized wave or right-handed polarized wave) in heating chamber 2
Microwave radiation portion 6.
In the microwave heating equipment of embodiment 12, in heating chamber 2, radiate circularly polarized wave (left-hand polarized wave or dextrorotation
Polarized wave) microwave radiation portion 6 be to make two slits intersected with each other and be formed as X word shape, be configured to the long limit of each slit
(45 degree) are tilted relative to the direction of transfer X in waveguide 5.The structure of embodiment 12 is as follows: the slit in microwave radiation portion 6
Width 2q is different according to the position on the direction Z vertical from direction of transfer X and direction of an electric field Y in waveguide 5.
In two shown in Figure 22 microwave radiation portion 6, rear side region (towards direction of transfer region on the right side:
The upside of Figure 22) the opening portion in microwave radiation portion 6 formed than (the district of the side that keeps left towards direction of transfer, front face side region
The downside of territory: Figure 22) the opening portion in microwave radiation portion 6 big.Therefore, in fig. 22, it is shown that make from rear side region
The example that the microwave radiation amount of the opening portion in the microwave radiation portion 6 of (towards direction of transfer region) on the right side increases.
The microwave heating equipment of embodiment 12 configured as described above is configured to, by changing multiple microwave radiation portions 6
Configuration relation and each microwave radiation portion 6 in slit width (aperture area), it is possible to control microwave amount of radiation.Cause
This, in the microwave heating equipment of embodiment 12, it is possible to uniformly and efficiently to the heating object in heating chamber 2 carry out microwave
Heating.
It addition, in the microwave heating equipment of embodiment 12, as long as multiple microwave radiation portion 6 is at least at width Z
On be arranged, as microwave radiation portion 6, following structure is also contained in the structure of embodiment 12: not only at width
On the Z of direction, and on direction of transfer X, it is also configured with multiple microwave radiation portion 6.
In the microwave heating equipment 1 of embodiment 12, about the relation with other design considerations, it is not limited to about heating
Central symmetry ground in room 2 configures multiple microwave radiation portions 6.Even if it addition, being configured with about the central symmetry in heating chamber 2
Multiple microwave radiation portions 6, owing to being provided with the various portions such as heater and door glass in the storehouse of the microwave heating equipments such as microwave oven 1
Part, the distribution of the microwave in heating chamber 2 is also uneven the most in most cases.
Therefore, in the microwave heating equipment of embodiment 12, not only change the configuration in multiple microwave radiation portion 6, and
The slit width 2q in change microwave radiation portion 6, thus ensure that the uniformity that the microwave in heating chamber 2 is distributed.
In general, in the microwave radiation portion 6 intersected by two slits, it is shortened by the width 2q of slit, subtracts
The aperture area in little microwave radiation portion 6, so that the microwave amount being radiated in heating chamber 2 from microwave radiation portion 6 reduces.
Such as, when the microwave in the front face side region (downside of Figure 22) in the waveguide 5 shown in Figure 22 is distributed strong, pass through
Increase the slit width 2q in the microwave radiation portion 6 intersected by two slits in rear side region (upside of Figure 22), thus
Increase the aperture area in the microwave radiation portion 6 in rear side region.Its result, adds the microwave radiation portion from rear side region
6 are radiated the microwave amount in heating chamber 2, it can be ensured that the uniformity of the microwave distribution in heating chamber 2.
In the structure of embodiment 12, also described above in embodiment 2 as explanation, transmit using waveguide 5
When the microwave that the microwave generator 4 being made up of magnetron etc. produces, by the frequency of the microwave produced from the magnetron used
With the size on the direction of an electric field Y of waveguide 5, limit the size of upper and lower bound on the width Z of waveguide 5.
It addition, the condition of the shape as the microwave radiation portion 6 in embodiment 12, as above-mentioned embodiment 1 uses
As (a) of Fig. 4 is illustrated, the length (2p) of the slit (elongated opening portion) shown in Figure 22 is to pass in waveguide 5
About more than the 1/4 of the wavelength in pipe λ g of the microwave sent, two slits are each other in central authorities' intersection of length direction, and each slit
45 ° have been tilted relative to direction of transfer X.
And, the microwave radiation portion 6 being made up of two slits intersections is configured to, through the friendship of the slit in microwave radiation portion 6
Fork the axle parallel with direction of transfer X are not at the position making the Electric Field Distribution within waveguide 5 symmetrical.
Such as, when waveguide 5 transmits microwave with TE10 pattern, the central authorities on the width Z of waveguide 5 edge
The axis of symmetry that the pipe axle P that direction of transfer X extends is the Electric Field Distribution in waveguide 5.Therefore, in the structure of embodiment 12
In, the cross part of the slit in microwave radiation portion 6 is configured in the vertical of the pipe axle P of the axis of symmetry from waveguide 5, i.e. waveguide 5
The position of deviation on line.By configuring the slit in microwave radiation portion 6 in this wise, it is possible to allow microwave radiation portion 6 reliably radiate circle
Polarized wave.
It addition, in multiple microwave radiation portions 6 of radiation circularly polarized wave, the interval in adjacent microwave radiation portion 6 is the narrowest, micro-
Electric field between wave radiation portion 6 is concentrated the strongest, and the loss of microwave is the biggest, and the efficiency of heating surface is the poorest.As adjacent microwave radiation portion
6, preferably configure with the interval of more than 5mm.Therefore, it is configured in the structure of embodiment 12, expands phase as much as possible
Interval on the width Z of waveguide 5, the adjacent microwave radiation portion 6.
The microwave heating equipment of embodiments of the present invention 12 is configured to, multiple microwave radiation portions 6 be make two slits that
The shape that the long limit of this intersection and each slit tilts relative to the direction of transfer X in waveguide 5, the width 2q of slit is according to ripple
The position on the direction Z vertical from direction of transfer X and direction of an electric field Y in conduit 5 and different.The embodiment so constituted
The microwave heating equipment of 12 uniformly and efficiently to heating object can carry out microwave heating.
(embodiment 13)
Hereinafter, the microwave heating equipment of embodiments of the present invention 13 is illustrated.The microwave heating of embodiment 13
The device difference from the microwave heating equipment of above-mentioned embodiment 1 is configuration and the concrete structure in microwave radiation portion, other
Structure is identical with the microwave heating equipment of embodiment 1.
Element in the explanation of following embodiment 13, to the microwave heating equipment having with embodiment 1
Identical function, the element of structure mark identical symbol, and it describes the explanation of application implementation mode 1 in detail.
Figure 23 is the top view of waveguide 5, it illustrates the spoke in the microwave heating equipment of embodiments of the present invention 13
Penetrate the microwave radiation portion 6 of circularly polarized wave (left-hand polarized wave or right-handed polarized wave).
As shown in figure 23, in the microwave heating equipment 1 of embodiment 13, at the upper surface of waveguide 5 (with heating chamber 2
Relative surface) on, at least it is arranged on the direction Z vertical with direction of transfer X and direction of an electric field Y multiple to heating
The microwave radiation portion 6 of radiation circularly polarized wave in room 2.
In the microwave heating equipment 1 of embodiment 13, the microwave radiation portion 6 radiating circularly polarized wave in heating chamber 2 is
Make two slits intersected with each other and be formed as X word shape, be configured to the long limit of each slit relative to the sender in waveguide 5
(45 degree) are tilted to X.The microwave heating equipment 1 of embodiment 13 in microwave radiation portion 6 in shape, the angle to cross section 12
Portion has carried out R chamfer machining or C chamfer machining.It addition, in Figure 14 above, it is shown that to the slit in microwave radiation portion 6
Cross section 12 corner implement R chamfer machining or the illustration of C chamfer machining.In fig. 14, although show and implement R
Chamfer machining and the example of C chamfer machining both sides, but as long as the cross section 12 of the slit in microwave radiation portion 6 is implemented at least
Any one is processed.
In the microwave heating equipment 1 of embodiment 13 configured as described above, it is possible to that reduces in microwave radiation portion 6 is micro-
Ripple loses, it is possible to efficiently heating object is carried out microwave heating.
Owing to microwave has the character in the segment set of corner or the point of end, therefore intersected with each other by two slits
And in the microwave radiation portion 6 constituted, in the case of its cross part office has the shape of point, the electricity caused by microwave can be produced
Field is concentrated, and there is the problem that the efficiency of heating surface reduces.
Therefore, in the microwave heating equipment 1 of embodiment 13, to microwave spoke that is intersected with each other by two slits and that constitute
R chamfer machining or C chamfer machining are implemented in the corner penetrating the cross section 12 in portion 6, thus alleviate electric field and concentrate, and improve and add
The thermal efficiency.
(embodiment 14)
Hereinafter, the microwave heating equipment of embodiments of the present invention 14 is illustrated.The microwave heating of embodiment 14
The device difference from the microwave heating equipment of above-mentioned embodiment 1 is the structure that the configuration in microwave radiation portion is concrete, other
Structure is identical with the microwave heating equipment of embodiment 1.
Element in the explanation of following embodiment 14, to the microwave heating equipment having with embodiment 1
Identical function, the element of structure mark identical symbol, and it describes the explanation of application implementation mode 1 in detail.
Figure 24 is the top view of waveguide 5, it illustrates the spoke in the microwave heating equipment of embodiments of the present invention 14
Penetrate the microwave radiation portion 6 of circularly polarized wave (left-hand polarized wave or right-handed polarized wave).
As shown in figure 24, in the microwave heating equipment 1 of embodiment 14, at the upper surface of waveguide 5 (with heating chamber 2
Relative surface) on, at least it is arranged on the direction (width Z) vertical with direction of transfer X and direction of an electric field Y
Multiple microwave radiation portions 6 radiating circularly polarized wave in heating chamber 2.
In the microwave heating equipment 1 of embodiment 14, the microwave radiation portion 6 radiating circularly polarized wave in heating chamber 2 is
Make two slits intersected with each other and be formed as X word shape, be configured to the long limit of each slit relative to the sender in waveguide 5
(45 degree) are tilted to X.At the slot ends part 13 in the microwave radiation portion 6 in embodiment 14, implement R chamfer machining or
C chamfer machining.It addition, in Figure 14 above, it is shown that the R of end section 13 enforcement of the slit in microwave radiation portion 6 is fallen
Angle processing or the illustration of C chamfer machining.In fig. 14, although show and implement R chamfer machining and the example of C chamfer machining both sides
Son, but as long as implementing the end section 13 of the slit in microwave radiation portion 6 at least, any one is processed.
In the microwave heating equipment 1 of embodiment 14 configured as described above, it is possible to that reduces in microwave radiation portion 6 is micro-
Ripple loses, it is possible to efficiently heating object is carried out microwave heating.
Microwave has the character in the segment set of corner or the point of end.Therefore, by two slits intersected with each other and
In the microwave radiation portion constituted, in the case of the end section 13 of slit has corner angle shape, can produce and be caused by microwave
Electric field is concentrated, and there is the problem that the efficiency of heating surface reduces.
Therefore, in the microwave heating equipment 1 of embodiment 14, to microwave spoke that is intersected with each other by two slits and that constitute
Penetrate the slot ends part 13 in portion and implement R chamfer machining or C chamfer machining, thus alleviate electric field and concentrate, improve heating
Efficiency.
" embodiment 15 and embodiment 16 "
In the microwave heating equipment of above-mentioned embodiment 1 to embodiment 14, illustrate following structure: by radiation circle partially
Shake multiple microwave radiation portions 6 of ripple are arranged at the desired locations on the surface relative with heating chamber 2 of waveguide 5, it is possible to all
Even and efficiently the heating object in heating chamber 2 is carried out microwave heating.At embodiment 15 described below and embodiment
In the microwave heating equipment of 16, following structure is illustrated: as the microwave heating of above-mentioned embodiment 1 to embodiment 14
Mounting portion in device, by arranging sealing unit described later such that it is able to carry out more efficient microwave heating.
In conventional representational microwave heating equipment, some microwave heating equipments are configured to: passed by the microwave produced
Deliver to rotable antenna, pass through rotable antenna stirring microwave and irradiate microwaves in heating chamber.
Figure 30 shows the conventional microwave heating described in Japanese Unexamined Patent Publication 2007-225186 publication (patent documentation 3)
Device.Conventional microwave heating equipment shown in Figure 30 has: heating chamber 21, and it receives heating object；Magnetron 22, it produces
Microwave；Waveguide 23, it transmits microwave；Rotable antenna 24, it is used for irradiating microwaves in heating chamber 21；And hush panel
25, it is arranged between heating chamber 21 and rotable antenna 24.
The microwave produced by magnetron 22 transmits in waveguide 23, transmits the microwave come and couples on rotable antenna 24,
It is radiated in heating chamber 21 by rotable antenna 24.Now, in order to the heating preventing heating object is uneven, rotated by motor etc.
Driving source makes rotable antenna 24 rotate, it is achieved that the homogenization of the microwave distribution in heating chamber 21.
In heating chamber 21, the hush panel 25 being arranged between heating chamber 21 and rotable antenna 24 is present to ensure that heated
The stable mounting of thing, and prevent the gas (steam, oil) produced from heating object to rotable antenna 24 and waveguide 23
Pollute and corrode and arrange.It is radiated in heating chamber 21 from the microwave transparent hush panel 25 of rotable antenna 24.As envelope
Oralia 25, employs the sheet material such as pottery or glass.
In the conventional microwave heating equipment so constituted, in order to be evenly distributed microwave in heating chamber 21,
Stir microwave by rotable antenna 24, radiate in heating chamber 21.It is arranged on heating chamber 21 accordingly, it would be desirable to increase and rotates
Region, microwave transparent portion in hush panel 25 between antenna 24.And the hush panel 25 that microwave is passed through is to absorb microwave energy in a large number
The structure of amount.
Its result, big from the energy loss of the microwave of rotable antenna 24 radiation, the microwave energy being radiated in heating chamber subtracts
Few, the efficiency of heating surface is deteriorated.
It addition, in the structure of conventional microwave heating equipment, in order to realize being uniformly distributed of microwave in heating chamber 21,
Need to use rotable antenna 24 and for the mechanism making this rotable antenna 24 rotate.Accordingly, it would be desirable to the driving of rotable antenna 24 is empty
Between, it is necessary to guarantee the installation space of motor etc. as the mechanism making rotable antenna 24 rotate.So, as shown in figure 30
In conventional microwave heating equipment, include a lot of factor hindering miniaturization.
It addition, in order to make rotable antenna 24 be stably rotated, need to be arranged on rotable antenna 24 top of heating chamber or
Bottom, structure is very restricted.
The embodiment 15 of invention described below and the structure of embodiment 16 provide microwave as described below and add
Thermal: there is multiple microwave radiation portion radiating circularly polarized wave in heating chamber in desired position, because of without rotation
Relay antenna and for making the mechanism that rotable antenna rotates, it is possible to the realization uniform microwave heating to heating object, and utilize
Mouth-sealed portion as sealing unit constitutes mounting portion 3, significantly inhibits the absorption loss water of microwave such that it is able to realize excellence
The efficiency of heating surface.
The microwave heating equipment of embodiments of the present invention 15 and embodiment 16 has structure as described below: by inciting somebody to action
It is defined so as to little as the microwave transparent region in the mouth-sealed portion of mounting portion 3, it is possible to the absorption of the microwave energy in minimizing mouth-sealed portion
Loss.Its result, in the microwave heating equipment of embodiment 15 and embodiment 16, it is possible to increase microwave is to heating object
The efficiency of heating surface, it is possible to energy-efficient performance is greatly improved.
(embodiment 15)
Hereinafter, the microwave heating equipment of embodiments of the present invention 15 is illustrated.The microwave heating of embodiment 15
The device difference from the microwave heating equipment of above-mentioned embodiment 1 to embodiment 14 is, as the mounting portion of heating chamber
Mouth-sealed portion there is special structure, the structure of the microwave heating equipment of other structure application implementation mode 1 to embodiments 14.
Element in the explanation of following embodiment 15, to the microwave heating equipment having with embodiment 1
Identical function, the element of structure mark identical symbol, and it describes the explanation of application implementation mode 1 in detail.
Figure 25 is the integrally-built vertical of the microwave oven of the microwave heating equipment being shown as embodiments of the present invention 15
Body figure.Figure 26 is the front section view of the microwave heating equipment of embodiment 15.Figure 27 is that the microwave illustrating embodiment 15 adds
The section plan that the bottom surface sections of the heating chamber in thermal is graded.
In fig. 25, the microwave oven 1 as microwave heating equipment is configured to have heating chamber 2, and heating chamber 2 is used for picking and placeing
The door (front side wall) 7 of the heating objects such as food and each wall (bottom surface, upper surface, left surface, right flank and the back side) surround.
In the mounting portion 3 of the bottom surface as heating chamber 2, it is provided with for making from microwave radiation portion 6(with reference to Figure 26)
Microwave transparent and be radiated heating chamber 2 as sealing unit mouth-sealed portion 10.Mouth-sealed portion 10 is by the microwave making microwave transparent
Through portion 8 and the microwave reflection portion 9 reflecting microwave are constituted.
As shown in Figure 26 and Figure 27, in the lower section of the mouth-sealed portion 10 being configured at heating chamber 2 bottom surface, it is provided with waveguide 5,
It transmits the microwave of the microwave generator 4 as microwave generating unit that free magnetron is constituted；And microwave radiation portion 6,
It is arranged on the surface relative with mouth-sealed portion 10 of waveguide 5.Microwave radiation portion 6 is above-mentioned embodiment 1 to embodiment party
In formula 14, the peristome of the reservation shape of explanation, is the microwave spoke in order to will transmit via waveguide 5 from microwave generator 4
Arrange in being mapped to heating chamber 2.
Multiple microwave radiation portions 6 are arranged as opposed to the microwave transparent portion 8 in mouth-sealed portion 10.Made micro-by not carrying out absorbing
The microwave transparent portion 8 that the material that ripple passes through is formed is arranged in the surface of the peristome in multiple microwave radiation portion 6, is configured to open
Oral area is included.
Then, action and the work to the microwave oven of the microwave heating equipment 1 as embodiment 15 configured as described above
With illustrating.
In the heating action of microwave heating equipment 1, first, upload at the mouth-sealed portion 10 as the bottom surface in heating chamber 2
Put the heating objects such as gratin, close door 7.By microwave containment in the air-tight state of interior heating chamber 2, by carry out for
Begin to warm up the scheduled operation of action, thus started microwave generator 4 by control portion (not shown), produce microwave.
Produced microwave transmits in waveguide 5, from microwave radiation portion 6 radiation being arranged on waveguide 5 as circle
The microwave of polarized wave.Microwave transparent portion 8 from the microwave transparent mouth-sealed portion 10 of microwave radiation portion 6 radiation, supplies in heating chamber 2
Electricity (radiation).Utilize the microwave of power supply in heating chamber 2 that heating object is carried out microwave heating, perform the desired cooking.
Circularly polarized wave is as explanation in above-mentioned embodiment 1, wide in the field of mobile communication and satellite communication
The technology of general use.Make use-case as familiar, ETC(Electronic Toll Collection System can be enumerated)
" electronic charging system without parking " etc..
Circularly polarized wave is the microwave that the plane of polarization of electric field rotates in time relative to the direct of travel of electric wave, when forming circle partially
Shake ripple time, the direction of electric field the most persistently changes.Therefore, time in by the microwave radiation of circularly polarized wave to heating chamber, have
Following advantage: the angle of radiation of the microwave being radiated in heating chamber persistently changes, and the size of electric field intensity is not real in time
Qualitative change.
But, when being single in the microwave radiation portion radiating microwave in heating chamber, the sensing of the microwave owing to being radiated
Property etc. impact and cause the microwave skewness in heating chamber, and be difficult to obtain uniformly this microwave distributed controll.So,
When being single in microwave radiation portion, microwave radiation is intensively heated near portion, therefore exists in heating object and produces heating not
Equal problem.
As narration in above-mentioned embodiment 1 to embodiment 14, by arranging multiple radiation circularly polarized wave
The microwave radiation portion 6 of microwave, it is possible to the problem solving to occur above-mentioned heating uneven.That is, by arranging multiple microwave radiation portion 6,
Can dispersion microwave radiation in heating chamber 2, therefore compared with single microwave radiation peristome, it is possible to alleviate microwave concentrate,
Equably heating object can be heated.
And, as shown in figure 30, conventional microwave heating equipment by the way of rotable antenna 24 radiates microwave
In, produce standing wave because being radiated the microwave in heating chamber 21 and the interference between the microwave reflected by the inwall of heating chamber 21.
Therefore, principle can produce in heating object heating inequality.
In the microwave heating equipment of the present invention, owing to being the structure utilizing multiple microwave radiation portion 6 to radiate circularly polarized wave,
Therefore, in principle, the structure that will not produce the standing wave caused by the interference effect of microwave is become.Therefore, the microwave of the present invention adds
Thermal is it can be avoided that the power of microwave energy that caused by standing wave in heating chamber, it is possible to more uniformly carry out heating object
The structure of heating.
In the microwave heating equipment of embodiment 15, as the bottom surface of heating chamber 2, it is provided with mouth-sealed portion 10, mouth-sealed portion
Microwave transparent portion 8 in 10 is made up of the material making microwave transparent.But, in microwave transparent portion 8, how many materials self all can
Absorb ripple slightly, be difficult to accomplish to make microwave transparent portion 8 pass through microwave with the ratio of 100%.
Therefore, when forming mouth-sealed portion 10 overall of the bottom surface constituting heating chamber 2 with the material in microwave transparent portion 8,
The microwave absorption amount of material self increases, and hankers the minimizing of effective energy adding heating object, and the efficiency of heating surface is deteriorated.
In the microwave heating equipment of embodiments of the present invention 15, in order to reduce the energy loss of microwave, structure as far as possible
Become the microwave transparent portion 8 as microwave transparent region in mouth-sealed portion 10 that reduces as far as possible.Microwave at embodiment 15 adds
In thermal, mouth-sealed portion 10 is made up of microwave transparent portion 8 and microwave reflection portion 9, and microwave transparent portion 8 is provided only on and microwave radiation
The position that portion 6 is relative.
In the microwave heating equipment of embodiment 15 configured as described above, owing to can be configured to reduce mouth-sealed portion
Make the region of microwave transparent in 10, therefore inhibit the absorption of microwave in mouth-sealed portion 10.Its result, micro-at embodiment 15
In Wave heating device, it is possible to reduce the loss amount of the microwave energy being radiated in heating chamber 2, it is possible to increase microwave is to heating object
The efficiency of heating surface.
It addition, the situation that shape in the microwave transparent portion 8 as microwave transparent region is less than the shape in microwave radiation portion 6
Under, there is the microwave from microwave radiation portion 6 radiation and occur to reflect and close echo conduit 5 the microwave reflection portion 9 of mouth-sealed portion 10
Problem.In the case of microwave in this wise close echo conduit 5, microwave returns to microwave generator 4, energy as echo
Loss becomes big.It is preferred, therefore, that the knot that the peristome that microwave transparent portion 8 has to major general's microwave radiation portion 6 is included
Structure, becomes at least big than the peristome in microwave radiation portion 6 shape.
In the microwave heating equipment of embodiment 15 configured as described above, mouth-sealed portion 10 makes the region of microwave transparent
Reduce, using other regions as reflector space.Therefore, produce because of the microwave absorption in the microwave transparent portion 8 of mouth-sealed portion 10
The loss of microwave energy significantly reduces.Its result, according to the structure of the microwave heating equipment of embodiment 15, it is possible to increase microwave
The efficiency of heating surface to heating object, it is possible to realize excellent energy-efficient performance.
It addition, in the microwave heating equipment of embodiment 15, owing to being to heating chamber by the microwave radiation of circularly polarized wave
Interior mode, therefore need not rotable antenna and for driving the motor of rotable antenna.Its result, at the microwave of embodiment 15
In heater, it is not necessary to arrange rotable antenna drives space and the installation space of rotable antenna and drive mechanism etc. thereof, energy
Enough realize the miniaturization of microwave heating equipment.And, the microwave heating equipment of miniaturization serves and can reduce in kitchen etc.
The excellent effect of installation space.
It addition, the loss as the material in microwave transparent portion 8, preferably microwave absorption less and has mechanical strength and resistance to
The material of property, the most preferably comprises the glass ceramics of silicon oxide, aluminium oxide, zirconium oxide, lithium oxide for a long time.
It addition, do not possess oven function and baking function or by the cook temperature in heating chamber at microwave heating equipment
In the case of being designed as less than 250 DEG C, it is also possible to applying and losing the plastics fewer than above-mentioned glass ceramics with microwave absorption is main one-tenth
The material divided.In this case, the engineering plastics that particularly preferably thermostability is high.
As it has been described above, in the microwave heating equipment of embodiment 15, mouth-sealed portion 10 is by microwave transparent portion 8 and microwave reflection
Portion 9 is constituted.So, owing to being provided with the microwave reflection portion 9 of the function with microwave reflection in mouth-sealed portion 10, therefore, not by
The microwave that heating object in heating chamber absorbs and reflects reflects in microwave reflection portion 9, it is possible to again irradiate heated
Thing.
As it has been described above, in the microwave heating equipment of embodiment 15, owing to being provided with microwave reflection portion 9, therefore, it is possible to
Improve the microwave efficiency of heating surface to heating object further, improve energy-efficient performance further.
It addition, about microwave reflection portion 9, by using metal material, it is possible to improve the reflection characteristic of microwave further, because of
This can improve the microwave efficiency of heating surface to heating object further.
As microwave reflection portion 9, it is also possible to apply that define at metallic surface will not be due to inductive loss, magnetic loss
Deng and absorb the reflecting part of the cover layer of microwave, such as fluorine coating.
It addition, in the microwave heating equipment of the embodiment 15 shown in Figure 27, although illustrate to be provided with 6 microwave spokes
Penetrate the example in portion 6, but in the structure of embodiment 15, the quantity in microwave radiation portion 6 is not limited, can be according to microwave
The size of the heating chamber in heater, microwave power, the kind etc. of cooking object and be suitably set.
It addition, in the microwave heating equipment of the embodiment 15 shown in Figure 27, although by the shape table in microwave radiation portion 6
It is shown as circular, but as the shape in microwave radiation portion 6, as above-mentioned illustrated in fig. 4, various shape can be applied
Shape.The shape in microwave radiation portion 6 can be fitted according to parts interpolation in the size of microwave heating equipment, shape, heating chamber etc.
Locality is set, in order to be added heat distribution uniformly, and can be from the shape such as circle, circle, tetragon, X-shaped, Y shape
Select and apply.
(embodiment 16)
Hereinafter, the microwave heating equipment of embodiments of the present invention 16 is illustrated.The microwave heating of embodiment 16
The device difference from the microwave heating equipment of above-mentioned embodiment 15 is the mouth-sealed portion as the mounting portion in heating chamber
Structure.
Element in the explanation of following embodiment 16, to the microwave heating equipment having with embodiment 1
Identical function, the element of structure mark identical symbol, and it describes the explanation of application implementation mode 1 in detail.
Figure 28 is the front section view of the microwave heating equipment of embodiments of the present invention 16.Figure 29 is to illustrate embodiment
The section plan that the bottom surface sections of the heating chamber in the microwave heating equipment of 16 is graded.
In the microwave heating equipment of embodiment 16, according to microwave radiation portion 6 shape segmentations configure as mounting
Microwave transparent portion 8 in the mouth-sealed portion 10 in portion 3.
As shown in Figure 28 and Figure 29, as the microwave transparent portion 8 in the mouth-sealed portion 10 of mounting portion 3 with multiple microwave radiations
The mode that the quantity in portion 6 is corresponding, is divided into equal number, becomes the shape corresponding with the shape in microwave radiation portion 6.Implementing
In the microwave heating equipment of mode 16, each microwave transparent portion 8 is arranged as opposed to each microwave radiation portion 6, is constructed so that
The microwave as circularly polarized wave radiated passes through from microwave transparent portion 8.
Microwave from the microwave generator 4 as microwave generating unit transmits, from microwave radiation portion 6 in waveguide 5
Radiate with circularly polarized wave.The microwave transparent of the circularly polarized wave radiated has the micro-of the shape corresponding with microwave radiation portion 6
Ripple through portion 8, is radiated in heating chamber 2.
By making microwave transparent portion 8 become the shape corresponding with microwave radiation portion 6, it is possible to make the microwave in mouth-sealed portion 10 saturating
Cross the Min. that the penetrating region in portion 8 necessitates.Its result, in the microwave heating equipment of embodiment 16, due to micro-
The absorption of the microwave in ripple through portion 8 is few, therefore, it is possible to improve the microwave energy power supplying efficiency to heating chamber 2, it is possible to enter one
Step improves the efficiency of heating surface of heating object.
It addition, about the shape in microwave transparent portion 8, although it is preferably corresponding with the peristome shape in microwave radiation portion 6
Shape, but it is not particularly limited.About microwave transparent portion 8, it is possible to use with the shape same shape in microwave radiation portion 6
Microwave transparent portion, at this point it is possible to the shape of the peristome and microwave transparent portion 8 being configured to microwave radiation portion 6 coincides with one another.
It addition, about microwave transparent portion 8, can be unrelated with the shape in the microwave radiation portion 6 of the microwave of radiation circularly polarized wave
Ground, the microwave transparent portion that application is circular.Now, it is preferred that the peristome bag in microwave transparent portion 8 to major general microwave radiation portion 6
In being contained in, and become the circle that diameter is identical or slightly longer with the long edge lengths of the such as slit in microwave radiation portion 6.
In the microwave heating equipment of the present invention, owing to having multiple microwave radiation radiating circularly polarized wave in heating chamber
Portion, it is thus possible to realize the uniform of heating object and high efficiency microwave heating.Its result, the microwave heating in the present invention fills
In putting, it is not necessary to arrange and make mechanism, the mechanism making mounting table rotate and the phase shifter etc. that antenna rotates, can uniformly and efficiently
Heating object is carried out microwave heating, it is possible to the cost realizing device reduces, the carrying of the miniaturization of power supply section and reliability
High.
Industrial applicability
In the microwave heating equipment of the present invention, it is possible to heating object irradiating microwaves equably, therefore, it is possible to carrying out
Add in the device etc. of hot-working or sterilization etc. and effectively utilize, and can be applied to make use of sensing heating heater,
Microwave heating equipment in the various equipment such as garbage disposer, semiconductor-fabricating device.
Label declaration
1 microwave heating equipment
2 heating chambers
3 mounting portions
4 microwave generators
5 waveguides
6 microwave radiation portions
7
8 microwave transparent portions
9 microwave reflection portions
10 mouth-sealed portions
Claims (18)
1. a microwave heating equipment, this microwave heating equipment has:
Heating chamber, it receives heating object；
Mounting portion, it constitutes the bottom surface of described heating chamber, receives mounting heating object in described heating chamber；
Microwave generating unit, it produces described microwave；
Waveguide portion, it transmits the microwave from described microwave generating unit；And
Multiple microwave radiation portions, it is arranged on the surface relative with described heating chamber in described waveguide portion, spoke in heating chamber
Penetrate circularly polarized wave,
The plurality of microwave radiation portion is formed at from the direction of transfer and direction of an electric field with the microwave described waveguide portion vertical
Direction on, the position of the axis of symmetry in waveguide portion deviation, the axis of symmetry in described waveguide portion is the electric field within described waveguide portion
The axis of symmetry of distribution,
The plurality of microwave radiation portion is to make at least two slit intersected with each other and the long limit of each slit is relative to described waveguide
The shape that direction of transfer in portion tilts, the position intersected is positioned at the position of the axis of symmetry deviation from described waveguide portion.
Microwave heating equipment the most according to claim 1, wherein,
The plurality of microwave radiation portion is arranged in the underface of described mounting portion.
Microwave heating equipment the most according to claim 2, wherein,
This microwave heating equipment is configured to, and the plurality of microwave radiation portion radiates the microwave of roughly the same amount of radiation respectively.
Microwave heating equipment the most according to claim 3, wherein,
It is arranged on the plurality of microwave radiation portion at least direction of transfer in described waveguide portion.
Microwave heating equipment the most according to claim 3, wherein,
On at least direction vertical with direction of transfer and direction of an electric field in described waveguide portion, the plurality of microwave radiation portion
It is arranged.
6. according to the microwave heating equipment described in claim 4 or 5, wherein,
The plurality of microwave radiation portion is configured to the long edge lengths of described slit according on the direction of transfer in described waveguide portion
Position and different.
7. according to the microwave heating equipment described in claim 4 or 5, wherein,
The plurality of microwave radiation portion be configured to the long edge lengths of described slit according in described waveguide portion with direction of transfer with
And position on the vertical direction of direction of an electric field and different.
8. according to the microwave heating equipment described in claim 4 or 5, wherein,
The plurality of microwave radiation portion is configured to the width of described slit according to the position on the direction of transfer in described waveguide portion
And it is different.
9. according to the microwave heating equipment described in claim 4 or 5, wherein,
The plurality of microwave radiation portion be configured to the width of described slit according in described waveguide portion with direction of transfer and electricity
The position on direction that field direction is vertical and different.
10. according to the microwave heating equipment described in claim 4 or 5, wherein,
The plurality of microwave radiation portion implements R chamfer machining or C chamfer machining to the cross section of described slit.
11. according to the microwave heating equipment described in claim 4 or 5, wherein,
The plurality of microwave radiation portion implements R chamfer machining or C chamfer machining to the end section of described slit.
12. according to the microwave heating equipment described in claim 4 or 5, wherein,
The plurality of microwave radiation portion, about the position of the cross section of described slit, has following shape: produce from described microwave
The microwave radiation portion that the transmitting range length risen position is set in life portion with from described microwave generating unit position is set transmission
Compare apart from short microwave radiation portion, high to the microwave emissivity of described heating chamber from described waveguide portion.
13. microwave heating equipments according to claim 3, wherein,
In described heating chamber, the mounting portion of storage mounting heating object has the microwave transparent portion making microwave transparent, described microwave
Through portion is arranged as opposed to described microwave radiation portion, described microwave transparent portion be arranged on described microwave radiation portion on Shaozheng
Side.
14. microwave heating equipments according to claim 13, wherein,
Described microwave transparent portion has the shape corresponding with described microwave radiation portion.
15. microwave heating equipments according to claim 14, wherein,
Described mounting portion is configured to the microwave reflection portion with described microwave transparent portion and microwave reflection.
16. microwave heating equipments according to claim 15, wherein,
Described microwave transparent portion is by the knot of at least any one material comprised in silicon oxide, aluminium oxide, zirconium oxide or lithium oxide
Crystal glass is constituted.
17. microwave heating equipments according to claim 15, wherein,
Described microwave transparent portion is made up of the material that main constituent is plastics.
18. microwave heating equipments according to claim 15, wherein,
Described microwave reflection portion is made up of metal material.
Applications Claiming Priority (9)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2010-264551 | 2010-11-29 | ||
| JP2010264551 | 2010-11-29 | ||
| JP2010266150 | 2010-11-30 | ||
| JP2010-266150 | 2010-11-30 | ||
| JP2010285588 | 2010-12-22 | ||
| JP2010-285588 | 2010-12-22 | ||
| JP2011081448 | 2011-04-01 | ||
| JP2011-081448 | 2011-04-01 | ||
| PCT/JP2011/006487 WO2012073451A1 (en) | 2010-11-29 | 2011-11-22 | Microwave heater |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103229593A CN103229593A (en) | 2013-07-31 |
| CN103229593B true CN103229593B (en) | 2016-12-14 |
Family
ID=
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1231397A (en) * | 1998-04-06 | 1999-10-13 | Lg电子株式会社 | Waveguide tube for microwave oven |
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1231397A (en) * | 1998-04-06 | 1999-10-13 | Lg电子株式会社 | Waveguide tube for microwave oven |
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