CN109526084A - Uniform field microwave heating equipment - Google Patents
Uniform field microwave heating equipment Download PDFInfo
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- CN109526084A CN109526084A CN201811381735.8A CN201811381735A CN109526084A CN 109526084 A CN109526084 A CN 109526084A CN 201811381735 A CN201811381735 A CN 201811381735A CN 109526084 A CN109526084 A CN 109526084A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 209
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Classifications
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
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Abstract
The major part of uniform field microwave heating equipment is divided into several heating modules and concatenated along Z axis by the present invention.TEn0 mode is only propagated in different microwave feed-in waveguides in each module, is inside more than or equal to 1, direction of an electric field only has X-axis component.The operational microwave in different microwave feed-in waveguides in each heating module is relevant same-phase, and the isolation between the operational microwave feed-in waveguide of different heating module is very high.We can use noncoherent microwave source in different heating module, it can also be in the different heating module arranged along Z axis using relevant microwave source, it allows along Z axis alignment and the operational microwave constant amplitude reverse phase in the adjacent microwave feed-in waveguide belonged in different heating module of Z axis, to motivate the TEn0 wave propagated along -Y direction and propagated from top to bottom along Y-axis from top to bottom in the heating chamber being made of the cavity for belonging to different heating module.
Description
Technical field
The present invention relates to microwave heating equipments.Material is evenly heated using higher mode high efficiency in particular it relates to a kind of
Compact microwave heating equipment.
Background technique
Microwave energy is substituted for various traditional heating modes.Microwave heating equipment utilizes the various materials of Microwave Heating
Material, including but not limited to timber, grain, condiment, dairy products.In microwave chemical field, microwave energy be used to accelerate variousization
Learn reaction.Microwave energy is also used for the production of a variety of materials such as nano material, diamond.
During traditional heating, heat by conducting inside it, belonging to surface heating outside heating object, cause by
It is uneven to heat object internal and external temperature.In Microwave Heating, microwave is material-to-be-heated by electric field action, leads to wherein polar molecule
Damping vibration generate heat, belong to body heating.Therefore it is heated simultaneously inside and outside heating object.
But there are three main problems for traditional microwave heating equipment.
First, the whole homogeneity question of heating.
In any confined space of heating chamber etc, electromagnetic wave by because covibration with the various intrinsic of the cavity
The form of mode of resonance exists.In wherein any one mode of resonance, electromagnetic wave all exists with standing wave form, leads to space
The amplitude of the electric field of a little fixed positions is maximum, and in addition the amplitude of certain fixed positions is zero.It is micro- in the typical case of 2450MHz
Wave energy applying frequency, these electric fields concentrate between distance be operational microwave used wavelength half or slightly larger, substantially exist
Between 61 ~ 100 millimeters, cause material-to-be-heated uneven on corresponding scale.
The size of common household microwave oven is 5 ~ 10 times bigger than above-mentioned scale.Large-scale heating in industrial microwave heating equipment
The size of furnace is 30 ~ 300 times bigger than above-mentioned scale.The mode of resonance that can be motivated near the working frequency in these cavitys
Number is several to several hundred.There's a widespread conviction that by people, is conducive to the uniformity of microwave heating using the heating chamber that height spends mould.But
It is that any superposition of plurality of mode of resonance may generate the electric field much larger than other positions in certain positions of heating chamber
It concentrates, causes the extreme of microwave heating uneven.
In order to solve the homogeneity question of Microwave Heating, international and domestic technical staff has carried out unremitting effort.People
Attempt by increase operational microwave feedback mouth number, change feedback mouth-shaped, change the feedback mouth of operational microwave in heating chamber appearance
The position in face perhaps changes the polarization direction of the feedback mouth of operational microwave or changes above-mentioned several variables at random simultaneously, passes through meter
It calculates or the method for improving heating uniformity is found in actual measurement.But up to the present, micro-wave oven, especially large-scale microwave heating are set
The homogeneity question of standby middle heating is not well solved.
Let us understands we face in large-scale microwave heating equipment heating uniformity technical problem.It is working
The frequency of microwave presents mouth for a certain microwave, after selecting its position, shape, polarization direction, in heating chamber mode up to a hundred respectively by
The determination of the intensity of excitation be all computationally it is very difficult, it is in actual measurement and extremely complex.And large-scale microwave
It is needed in heating equipment using a magnetrons up to a hundred as microwave source, therefore the number of corresponding microwave feedback mouth can be up to up to a hundred
It is a！The complexity of the above problem exceeds the imagination of people.
Second, heating efficiency problem.
Due to the whole efficiency of solid-state amplifier, especially its expensive cost, microwave heating equipment generally use magnetic control
Pipe provides microwave energy.With regard to current technology state of development, the efficiency of the power supply of magnetron is 90% or so, magnetron itself from
The transfer efficiency of high voltage power supply to microwave is 70% or so.So transfer efficiency of the magnetron from the alternating current of 220V to microwave is
63% or so.The actual efficiency of microwave heating equipment is then much lower.Household microwave oven etc. uses small-sized heating chamber and single magnetic control
Pipe.Since the variation of material-to-be-heated volume, shape and density etc. leads to the input impedance variation at microwave feedback mouth very greatly, lead
Cause magnetron often in impedance mismatching state, the microwave significant portion being input in heating chamber from magnetron is reflected back.
These reflected energy will have a direct impact on the work of magnetron.In order to protect magnetron, sometimes in magnetron and heating chamber
Between be mounted with waveguide junction circulator.At this moment, reflected microwave is directed into matched load by waveguide junction circulator and is inhaled
It receives.Therefore, the mismatch of microwave feedback mouth can all cause further decreasing for the general heating efficiency of microwave heating equipment.
Multiple magnetrons are generallyd use in large-scale microwave heating equipment as microwave source.These magnetrons pass through large size
Multiple microwaves feedback mouth on heating chamber surface injects microwave energy into heating chamber.It is micro- in these large-scale microwave heating equipments
Wave presents number up to up to a hundred of mouth.Since the different magnetrons used in heating chamber are independent from each other, they are generated micro-
It is irrelevant between wave, it is mutually indepedent between mutual frequency spectrum, for the microwave that any one magnetron generates, due in heating chamber
The amplitude and phase of a modes up to a hundred be difficult to control, may be from other multiple feedback mouths spillings.Although large-scale microwave heating equipment
The mismatch that microwave feedback mouth can be reduced by selecting material-to-be-heated volume, shape and density etc. reflects, but multiple microwaves
Microwave between feedback mouth overflows loss and is difficult to avoid that.
Third, large-scale microwave heating equipment energy leakage problem.
The material-to-be-heated of large-scale microwave heating equipment inputs microwave heating chamber by feed inlet with conveyer belt, after being heated
Pass through discharge port output.Under normal circumstances, the width of inlet port and outlet port be all 10 times of operational microwave wavelength even with
On.As microwave channel, inlet port and outlet port are all the high waveguides for spending mould.Mouth heating chamber is presented corresponding to any one microwave
In have a cavity modes up to a hundred.A microwaves up to a hundred present mouth, shape, position and polarization direction difference, in addition presenting from each feedback mouth
The microwave signal entered is mutually incoherent, so that microwave energy is passed through the serious Energy Leaking of inlet port and outlet port, causes micro-
The forfeiture of wave energy particularly results in large-scale microwave heating equipment to the electromagnetic interference of environment, or even to personal safety and causes prestige
The side of body.In order to reduce energy leakage, generally requires that very long filter structure is installed in inlet port and outlet port, lead to device length
It greatly increases.
Summary of the invention
The present invention, which passes through, controlled operating mode in mould heating chamber, provided that a kind of homogeneous heating, overall efficiency be high, microwave
Leak small or volume compact uniform field microwave heating equipment.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of uniform field microwave heating equipment, including at least one heating module.Any heating module includes a sky
Chamber, at least one above the cavity is connected to the cavity and the microwave feed-in to the cavity feed-in microwave energy
Waveguide.Microwave energy is supplied to each microwave feed-in waveguide by each microwave load point first from extraneous operational microwave.It is different
Heating module is arranged along Z axis, their cavity is sequentially communicated along Z axis, constitutes the heating chamber of uniform field microwave heating equipment.
This modularized design makes the uniform field microwave heating equipment of different purposes be readily achieved modularization assembling.According to different heating
The needs of power, we can choose using a heating module, can also be using two or more heating modules along Z axis string
It connects.
In order to improve uniform field microwave heating equipment heating uniformity in vertical direction, in each heating module
On, in the lower section of the cavity, be correspondingly arranged on each microwave feed-in waveguide the shape of the cross section in a horizontal plane with
The short circuited waveguide of the identical lower terminal shortcircuit of the shape of corresponding microwave feed-in waveguide.Preferably design, each short circuited waveguide is in Y-axis
Size it is identical.By adjusting the length of short circuited waveguide and the length along Z axis of each microwave feed-in waveguide, we can make each
The variation of operational microwave in the cavities vertically is minimum in module.
Constitute uniform field microwave heating equipment, further include one be located at leftmost heating module the left side and with the heating
The feed inlet of cavity connection of module and the right of a heating module positioned at rightmost and the institute with the heating module
State cavity connection discharge port and one through the feed inlet, the cavity of all heating modules and the discharging
Mouth is used to transport material-to-be-heated conveyer belt along Z axis.
We can also be not provided with any inlet port and outlet port.It at this moment can be by all heating modules along Z axis concatenation
It manufactures as a whole.The left side of a most left heating module and the right side of most right heating module are closed with metal plate, simultaneously will
The front panel of all heating modules is combined into one, and becomes the door-plate of uniform field microwave heating equipment.The door-plate can be outside
It opens, it is material-to-be-heated convenient for being sent into or taking out.
Better simply design, the number of the heating module are 1, the number of the microwave feed-in waveguide on the heating module
It is 1, the shape of the cross section of the microwave feed-in waveguide in the horizontal plane is rectangle.At this moment, the work in microwave feed-in waveguide
Mode is TE10 mode.
If we need bigger microwave energy, the number of the heating module can be 2 or more, but each described
The number of microwave feed-in waveguide on heating module is all 1；All microwave feed-in waveguides on all heating modules are in horizontal plane
The shape of interior cross section is rectangle.
For large-scale uniform field microwave heating equipment, the number of the heating module is at least 2, each heated mould
The number of microwave feed-in waveguide on block is more than or equal to 2.Multiple microwave feed-in waveguides on each heating module are arranged along X-axis；
The shape of the cross section of all microwave feed-in waveguides in the horizontal plane on all heating modules is rectangle.
For the ease of design and installation, shape all phases of the cross section of all microwave feed-in waveguides in the horizontal plane
Together；All microwave feed-in waveguides being uniformly distributed respectively along X-axis and along Z axis in the horizontal plane.
Main feature of the invention first is that control cavity in operational microwave mode.Precisely, it allows in cavity
Impinging microwave down along the transmission of-Y-axis and mode along the microwave reflection of Y-axis transmission is all TE10 mode upwards.At this moment, we
Heating module is known as basic mode heating module.Ideally, base in all microwave feed-in waveguides described in basic mode heating module
Mould TE10 mode is unique operating mode.Or basic mode TE10 mode is main operation modes, power is any other mode
Power 2 times or more.
In above several situations, the operating mode in all microwave feed-in waveguides may be TEn0 mode, and n is whole
Number is more than or equal to 2.At this moment, the electric field of microwave mode is still uniform in horizontal X-direction in cavity, has n electric field in Z axis
Amplitude maximum point.At this moment, heating module is known as n mould heating module.In fact, a n mould heating module is equivalent to n phase
Dry basic mode heating module is concatenated along Z axis.
In the present invention, the electric field of the TEn0 mode in all microwave feed-in waveguides is in the microwave feed-in waveguide
Operational microwave direction of an electric field along X-axis or edge-X-axis, or with the angle of X-axis between -30 degree and+30 degree, Huo Zhe
Between 150 degree and 210 degree.
For basic mode heating module, in order to guarantee the propagation of operational microwave in the rectangle microwave feed-in waveguide, microwave feedback
Enter n/2 times of wavelength that cross section in the horizontal plane of waveguide is greater than the free space of operational microwave along the length Lz of Z axis.
In order to guarantee to realize basic mode TE10 single mode transport, the level of microwave feed-in waveguide in the rectangle microwave feed-in waveguide
Cross section in face is less than the wavelength of the free space of operational microwave along the length Lz of Z axis.
Electric field in order to guarantee basic mode TEn0 in the rectangle microwave feed-in waveguide is relatively more slow along Y-axis variation in vertical direction
Slowly, so as to improve microwave heating in cross section of the vertical direction in the uniformity of Y-axis, the horizontal plane of microwave feed-in waveguide along Z
The length Lz of axis is set as 3n/5 ~ 9n/10 times of the vacuum medium wavelength of operational microwave.
In order to guarantee to realize basic mode TE10 single mode transport, the level of microwave feed-in waveguide in the rectangle microwave feed-in waveguide
Cross section in face generally should be smaller than the wavelength of the free space of operational microwave along the length Lx of X-axis.
It preferably designs, the cross section in the horizontal plane of microwave feed-in waveguide is less than operational microwave along the length Lx of X-axis
The 1/2 of the wavelength of free space.
In order to guarantee that uniform field microwave heating equipment in the uniform type heated laterally along X-axis, belongs on same heating module
Along X-axis arrangement the microwave feed-in waveguide in microwave be coherent wave, frequency spectrum is same or similar, in same level
Interior phase is identical or difference is less than 30 degree.
Meanwhile the microwave in the microwave feed-in waveguide on the adjacent heating module of Z axis is coherent wave, frequency spectrum phase
Same or close, the phase in same level is identical or opposite.It is accurate in fact, when n is odd number, along Z axis it is adjacent plus
Opposite in phase of the microwave in the microwave feed-in waveguide in same level in thermal modules.When n is even number, along Z axis
Phase of the microwave in the microwave feed-in waveguide in same level on adjacent heating module is identical.
Sometimes for reducing design requirement, the work in the microwave feed-in waveguide on the heating module adjacent along Z axis
Microwave may be irrelevant wave, be respectively derived from different microwave sources.
Under normal circumstances, the shape of cross section of the feed inlet with the discharge port in X/Y plane is identical, Er Qiewei
Rectangle.
In order to reduce the radiation leakage that uniform field microwave heating equipment passes through the feed inlet and the discharge port, or drop
The maximum height along Y-axis of its low shielding requirements, the cross section of the feed inlet and the discharge port in X/Y plane is less than work
Make the 1/2 of the wavelength of the free space of microwave.
In view of the flexibility of modularized design, in order to adapt to different heating requirement, the different heating module be can be
Separation unit, concatenates along Z axis, and number increases or decreases in which can be convenient.
Certainly, for specific heating requirements, all heating modules also complete the process as a whole, to save manufacturing cost.
Meanwhile for having design, we can be according to material-to-be-heated concrete condition, and neatly selection is closed part and added
The microwave source of thermal modules, to save the energy.
In order to increase the time of the material-to-be-heated interaction with operational microwave, in the uniform field microwave heating equipment
Heating object can be parallel to Z axis or so periodic oscillations in the case where being located at the drive of conveyer belt of cavity bottom.
In order to guarantee that the uniformity for being heated process along Z axis, the amplitude of oscillation for being parallel to Z axis or so periodic oscillations are equal to equal
Integral multiple of the microwave along the distance between Z axis adjacent electric field maximum point in shimming microwave heating equipment.
Operational microwave mode in cavity of the present invention by controlling uniform field microwave heating equipment is heated material to improve
The uniformity for expecting the heating in heating chamber in three dimensions prevents the microwave injected from any one microwave feed-in waveguide from existing
The spilling of other microwave feed-in waveguides simultaneously leads to energy loss, while reducing the microwave leakage by inlet port and outlet port.
In order to reach the goals above, the major part of uniform field microwave heating equipment is divided into several heating module edges by us
Z axis concatenation.It preferably designs, basic mode TE10 mode, electric field side is only propagated in the different microwave feed-in waveguides in each module
Do not change to only X-axis component and with X-axis.In this way, the uniformity of uniform field microwave heating equipment along the x axis is protected
Barrier.In order to reach this purpose, the operational microwave in the different microwave feed-in waveguides in each heating module is relevant same-phase
, it can be obtained through constant amplitude with phase power division network by the same microwave seed source, it can also be by microwave seed source etc.
With multichannel is mutually divided into, every road is obtained through solid-state amplifier width respectively.Consider simultaneously from reduction system cost, magnetron Phase Lock Technique
Or main vibration magnifier technology has good application prospect in terms of Pulse width.
Although being interconnected between the microwave between different heating module by respective cavity, due to of the invention
Special structure arrangement, the isolation between the microwave of different heating module is very high.Herein, each microwave heating module
Cavity in the incidence wave predominantly propagated downwards of microwave and the back wave that upwardly propagates, their mode is all TEn0 mould
Formula.The channel being interconnected between each heating module is effectively equivalent to be the gap being opened in the narrow side of rectangular waveguide.The seam
The long side of gap is parallel with the surface current of operating mode TEn0 mode on the rectangular waveguide.According to microwave theory, from the gap spoke
The microwave energy very little shot out.We set the cross-sectional shape in the channel between different heating module as square under normal circumstances
Shape.If the long side of the rectangle in the horizontal plane and is parallel to X-axis, the height along Y-axis is less than along the vacuum of operational microwave
The half of wavelength, it is material-to-be-heated to be mirrored into symmetrical, TEn0 mode and company in each heating module along X-axis in heating chamber
Be between the waveguide mode led in the channel of each heating module it is orthogonal, do not intercouple therebetween.Therefore, of the invention
In, there is good isolation between the microwave between different heating module.Similarly, heating module is leaked by inlet port and outlet port
The also very little of microwave out, can greatly shorten the filter for the micro-wave screening being used in the microwave heating equipment of generic homogeneous field
Length.
Therefore, this design of the invention has greatly reinforced the isolation between the microwave feed-in waveguide of different heating module
Degree, reduces microwave leakage of the equipment by inlet port and outlet port, or reduces the isolation of adjacent microwave heating module and want
It asks.Meanwhile we can also use noncoherent microwave source, such as magnetron in different heating module.It can also be according to quilt
The changes in demand of heating power neatly selects to close the microwave source of certain heating modules.
We can also be in the different heating module arranged along Z axis using relevant microwave source, for example derives from same
The solid-state amplifier array of microwave source.At this moment, it is a kind of it is preferable design be allow along Z axis be aligned and along Z axis it is adjacent belong to difference
The operational microwave constant amplitude reverse phase in microwave feed-in waveguide in heating module, thus in the cavity by belonging to different heating module
The TEn0 wave propagated along -Y direction and propagated from top to bottom along Y-axis from top to bottom has been motivated in the heating chamber of composition, n is integer,
More than or equal to 2.It is that we can monitor material-to-be-heated quilt in each heating module using another advantage of solid-state amplifier
The case where microwave heating, uses real-time, tunable match circuit to match by realization between solid-state amplifier and heating module to reduce and lose
With loss, the output power of amplifier is adjusted in real time, can also work in continuous impulse state and adjust its signal dutyfactor, reach
To more ideal heated condition, or further increase the whole efficiency of uniform field microwave heating equipment.
In the present invention, we can make microwave in heating chamber by setting microwave feed-in waveguide in the size Lz of Z axis
It is very uniform along Y-axis.It is greater than but the half of the vacuum medium wavelength close to operational microwave for this purpose, Lz is arranged in we, so that work is micro-
Waveguide wavelength of the wave in microwave feed-in waveguide, cavity and short circuited waveguide along Y-axis is long, reduces microwave electric field in uniform field
Variation in the vertical height of the heating chamber of microwave heating equipment, so as to improve the uniformity of microwave heating along the y axis.When
So, Lz is too close to the half of the vacuum medium wavelength of operational microwave, and the metal loss that will lead to microwave device increases, power capacity
Decline, the size in Y-axis for also resulting in short circuited waveguide is too big, is unfavorable for the miniaturization of equipment.Under normal circumstances, we are arranged
Lz is that 3/5 ~ 9/10 times of the vacuum medium wavelength of operational microwave is proper.This design improves heating chamber vertical
The uniformity of direction heating.
Microwave heating along the uniformity of Z-direction be then allowed by conveyer belt it is material-to-be-heated from left to right move or left and right
What back and forth movement was realized.
Detailed description of the invention
Attached drawing described herein is used to provide to further understand the embodiment of the present invention, constitutes one of the application
Point, do not constitute the restriction to the embodiment of the present invention.
Fig. 1 is heating module schematic side view.
Fig. 2 is the AA direction schematic diagram of Fig. 1.
Fig. 3 is 5 heating module uniform field microwave heating equipment schematic side views.
Fig. 4 is single heating module uniform field microwave heating equipment schematic side view.
The AA direction schematic diagram of Fig. 4 when Fig. 5 is single microwave feed-in waveguide.
The AA direction schematic diagram of Fig. 4 when Fig. 6 is 4 microwave feed-in waveguide.
Fig. 7 is 4 relevant heating module uniform field microwave heating equipment schematic side views.
Fig. 8 is the AA direction schematic diagram of Fig. 7.
Fig. 9 is the 4 relevant heating module uniform field microwave heating equipment schematic side views for being not provided with short circuited waveguide.
Label and corresponding parts title in attached drawing: 1- microwave feed-in waveguide, 3- cavity, 4- feed inlet, 5- discharge port,
8- conveyer belt, 10- short circuited waveguide.
The all directions used in figure provide as follows: top, i.e. Y direction.Lower section, the i.e. direction opposite with Y-axis.Right,
That is Z-direction.Left, the i.e. direction opposite with Z axis.
Specific embodiment
To make the objectives, technical solutions, and advantages of the present invention clearer, below with reference to embodiment and attached drawing, to this
Invention is described in further detail.Exemplary embodiment and its explanation of the invention for explaining only the invention, is not made
For limitation of the invention.
Embodiment 1
As shown in Figs. 1-3.
A kind of uniform field microwave heating equipment, including 5 heating modules.Any heating module includes a cavity
3,4 along X-axis arrangement above the cavity 3 are connected to the cavity 3 and present to the microwave of its feed-in microwave energy
Enter waveguide.Microwave energy is supplied to each microwave feed-in waveguide by each microwave load point first from extraneous operational microwave.No
It is arranged with heating module along Z axis, the cavity 3 is sequentially communicated along Z axis.
On each heating module, in the lower section of the cavity 3, one is correspondingly arranged on each microwave feed-in waveguide
The short circuited waveguide of the shape of a cross section in the horizontal plane lower terminal shortcircuit identical with the shape of corresponding microwave feed-in waveguide.
All short circuited waveguides all are the same size Y direction.
Constitute uniform field microwave heating equipment, further include one be located at leftmost heating module the left side and with the heating
Feed inlet 4 that the cavity 3 of module is connected to and one be located at the right of the heating module of rightmost and with the heating module
Discharge port 5 that the cavity 3 is connected to and one run through the feed inlet 4, the cavity 3 of all heating modules and institute
State discharge port 5 for transporting material-to-be-heated conveyer belt 8 along Z axis.
The shape of the cross section of all microwave feed-in waveguides in the horizontal plane on all heating modules is rectangle.
The shape of the cross section of all microwave feed-in waveguides in the horizontal plane is all identical；All microwave feed-in waves
Lead being uniformly distributed respectively along X-axis and along Z axis in the horizontal plane.
Cross section in the horizontal plane of microwave feed-in waveguide is less than the wave of the free space of operational microwave along the length Lx of X-axis
Long 1/2.
The operational microwave in the microwave feed-in waveguide of X-axis arrangement belonged on same heating module is coherent wave,
Its frequency spectrum is identical, and the phase in same level is identical.
The operational microwave in the microwave feed-in waveguide on the heating module adjacent along Z axis is irrelevant wave, is come respectively
Derived from different microwave sources.
The shape of cross section of the feed inlet 4 with the discharge port 5 in X/Y plane is identical, and is rectangle.
The height along Y-axis of the cross section of the feed inlet 4 and the discharge port 5 in X/Y plane is less than operational microwave
The 1/2 of the wavelength of free space.
The different heating module is separation unit, is concatenated along Z axis.
We can be according to material-to-be-heated concrete condition, and neatly the microwave source of part heating module is closed in selection, with
Save the energy.
Quilt in order to increase the material-to-be-heated and microwave interactive time, in the uniform field microwave heating equipment
Heating object can be parallel to Z axis or so periodic oscillations in the case where being located at the drive of conveyer belt of cavity bottom.
The amplitude of oscillation for being parallel to Z axis or so periodic oscillations is equal to operational microwave between Z axis adjacent electric field maximum point
3 times of distance.
Embodiment 2
As shown in Figure 4 and Figure 5.
Compared with embodiment 1, the difference is that only, only with a heating module, the heating module only with
One microwave feed-in waveguide 1 and short circuited waveguide 10.
The embodiment may be constructed a micro-wave oven.At this moment, any feed inlet 4 and discharge port 5 can be not provided with.It is micro-
Wave door-plate be located at cavity-side of X-axis.With general micro-wave oven from the work in side feed-in operational microwave and micro-wave oven
The multi-mode working of microwave is compared, and this embodiment is from top feed-in operational microwave.Meanwhile by control operational microwave in cavity
In waveguide mode be basic mode TE10 wave, ensure that microwave in the uniformity of X-direction.
Embodiment 3
As shown in Figure 4 and Figure 6.
It compared with embodiment 2, the difference is that only, arrange 4 microwave feed-ins on a heating module in X direction
Waveguide 1.Operational microwave in all microwave feed-in waveguides is coherent wave, and frequency spectrum is identical, and amplitude is identical, and phase is identical.It can be with
As uniform field microwave heating equipment, X-direction is used in than the broader occasion of embodiment 2.
Embodiment 4
As shown in Figure 7 and Figure 8.
It compared with embodiment 3, the difference is that only, use 4 heating modules along Z-direction, and all micro-
Operational microwave in wave feed-in waveguide 1 is coherent wave, and frequency spectrum is identical, and amplitude is identical.All microwave feed-in waves arranged in X direction
The operational microwave phase led in 1 is identical.The phase of operational microwave in any two microwave feed-in waveguide 1 adjacent along Z-direction
On the contrary.It can be used as uniform field microwave heating equipment, used in the occasion for requiring bigger heating power than embodiment 3.
Embodiment 5
As shown in Figure 9.
It compared with embodiment 4, the difference is that only, be not provided with any short circuited waveguide 10.Advantage be structure more
It is simple.The disadvantage is that in the heating uniformity difference of Y direction material.
Claims (9)
1. a kind of uniform field microwave heating equipment, which is characterized in that including at least one heating module, the heating module includes
One cavity (3), be located at the cavity (3) above, at least one of axis along the y axis be connected to the cavity (3) and to
The microwave feed-in waveguide (1) of cavity (3) the feed-in microwave energy；Each heating module passes through the respective cavity (3)
It is sequentially communicated along Z-direction；The microwave feed-in waveguide (1) is rectangular waveguide；Work in any microwave feed-in waveguide (1)
The angle in direction and X-axis of the electric field of mode TEn0 mode at the sized central along Z axis of the microwave feed-in waveguide (1)
Between -30 degree and+30 degree, or between 150 degree and 210 degree, n is integer, is more than or equal to 1；X-axis, Y-axis and Z axis are constituted
Rectangular coordinate system.
2. uniform field microwave heating equipment according to claim 1, which is characterized in that on each heating module,
In the underface of the cavity (3), a cross section in the horizontal plane is correspondingly arranged on each microwave feed-in waveguide (1)
The short circuited waveguide (10) of shape and the identical lower terminal shortcircuit of shape of corresponding microwave feed-in waveguide (1)；All short circuited waveguides
(10) identical in the size of Y direction.
3. uniform field microwave heating equipment according to claim 1, which is characterized in that further include one positioned at leftmost
The left side of heating module and the feed inlet (4) being connected to the cavity (3) of the heating module and adding positioned at rightmost
The right of thermal modules and the discharge port (5) being connected to the cavity (3) of the heating module and one run through the feed inlet
(4), all cavitys (3) and the discharge port (5) for transporting material-to-be-heated conveyer belt (8) along Z axis.
4. uniform field microwave heating equipment according to claim 1, which is characterized in that all microwave feed-in waveguides
(1) shape of cross section in the horizontal plane is all identical；All microwave feed-in waveguides (1) in the horizontal plane respectively along X
It axis and is uniformly distributed along Z axis.
5. uniform field microwave heating equipment according to claim 1, which is characterized in that all microwave feed-in waveguides
(1) power of TEn0 mode is the 2 times or more of the wherein power of any other mode in, and n is integer, is more than or equal to 1.
6. uniform field microwave heating equipment according to claim 1, which is characterized in that the rectangle microwave feed-in waveguide
(1) along 3n/5 ~ 9n/10 times of the wavelength that the length Lz of Z axis is operational microwave free space.
7. uniform field microwave heating equipment according to claim 1, which is characterized in that the rectangle microwave feed-in waveguide
(1) it is less than the 1/2 of the wavelength of the free space of operational microwave along the length Lx of X-axis.
8. uniform field microwave heating equipment according to claim 1, which is characterized in that belong to the edge on same heating module
The operational microwave that transmits downwards is coherent wave in all microwave feed-in waveguides (1) of X-axis arrangement, and frequency spectrum is identical or phase
Closely, the phase in same level is identical or difference is less than 30 degree.
9. uniform field microwave heating equipment according to claim 1, which is characterized in that on the heating module adjacent along Z axis
The microwave feed-in waveguide (1) in the operational microwave that transmits downwards be coherent wave, frequency spectrum is same or similar, same
Opposite in phase in horizontal plane.
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| CN201811381735.8A CN109526084A (en) | 2018-11-20 | 2018-11-20 | Uniform field microwave heating equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201811381735.8A CN109526084A (en) | 2018-11-20 | 2018-11-20 | Uniform field microwave heating equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709586A (en) * | 2022-04-07 | 2022-07-05 | 湖南大学 | Microwave resonant cavity capable of continuously translating electromagnetic field in microwave cavity and implementation method |
Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020158066A1 (en) * | 1998-02-19 | 2002-10-31 | Siemens Aktiengesellschaft | Furnace for microwave sintering of nuclear fuel |
| CN1613279A (en) * | 2001-11-08 | 2005-05-04 | 夏普株式会社 | Plasma process apparatus and its processor |
| US7368692B1 (en) * | 2007-01-26 | 2008-05-06 | Industrial Microwave Systems, L.L.C. | Ridged serpentine waveguide applicator |
| CN101282600A (en) * | 2007-04-06 | 2008-10-08 | 财团法人食品工业发展研究所 | Continuous microwave heating device |
| CN101828427A (en) * | 2007-10-18 | 2010-09-08 | 松下电器产业株式会社 | Microwave heating device |
| CN201637235U (en) * | 2010-01-29 | 2010-11-17 | 潜江市绿海宝生物技术有限公司 | A solid-state drying and sterilization microwave equipment |
| CN203888099U (en) * | 2013-12-05 | 2014-10-22 | 青岛科技大学 | Box type microwave continuous vulcanization device for rubber tires |
| CN106237957A (en) * | 2016-08-31 | 2016-12-21 | 电子科技大学 | A kind of conveying type quasi-salt free ligands ripple microwave reactor continuously |
| CN107787604A (en) * | 2015-02-17 | 2018-03-09 | 伊利诺斯工具制品有限公司 | For defrosting and/or the apparatus and method of cook food |
-
2018
- 2018-11-20 CN CN201811381735.8A patent/CN109526084A/en active Pending
Patent Citations (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20020158066A1 (en) * | 1998-02-19 | 2002-10-31 | Siemens Aktiengesellschaft | Furnace for microwave sintering of nuclear fuel |
| CN1613279A (en) * | 2001-11-08 | 2005-05-04 | 夏普株式会社 | Plasma process apparatus and its processor |
| US7368692B1 (en) * | 2007-01-26 | 2008-05-06 | Industrial Microwave Systems, L.L.C. | Ridged serpentine waveguide applicator |
| CN101282600A (en) * | 2007-04-06 | 2008-10-08 | 财团法人食品工业发展研究所 | Continuous microwave heating device |
| CN101828427A (en) * | 2007-10-18 | 2010-09-08 | 松下电器产业株式会社 | Microwave heating device |
| CN201637235U (en) * | 2010-01-29 | 2010-11-17 | 潜江市绿海宝生物技术有限公司 | A solid-state drying and sterilization microwave equipment |
| CN203888099U (en) * | 2013-12-05 | 2014-10-22 | 青岛科技大学 | Box type microwave continuous vulcanization device for rubber tires |
| CN107787604A (en) * | 2015-02-17 | 2018-03-09 | 伊利诺斯工具制品有限公司 | For defrosting and/or the apparatus and method of cook food |
| CN106237957A (en) * | 2016-08-31 | 2016-12-21 | 电子科技大学 | A kind of conveying type quasi-salt free ligands ripple microwave reactor continuously |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114709586A (en) * | 2022-04-07 | 2022-07-05 | 湖南大学 | Microwave resonant cavity capable of continuously translating electromagnetic field in microwave cavity and implementation method |
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