CN109475022A - TEn0 mould microwave heating equipment - Google Patents
TEn0 mould microwave heating equipment Download PDFInfo
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- CN109475022A CN109475022A CN201811381919.4A CN201811381919A CN109475022A CN 109475022 A CN109475022 A CN 109475022A CN 201811381919 A CN201811381919 A CN 201811381919A CN 109475022 A CN109475022 A CN 109475022A
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- 238000010438 heat treatment Methods 0.000 title claims abstract description 212
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- 208000002925 dental caries Diseases 0.000 claims description 2
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- 238000005259 measurement Methods 0.000 description 2
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- 241000196435 Prunus domestica subsp. insititia Species 0.000 description 1
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- 235000013339 cereals Nutrition 0.000 description 1
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Classifications
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/70—Feed lines
- H05B6/707—Feed lines using waveguides
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
- H05B6/78—Arrangements for continuous movement of material
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- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
Abstract
The major part of 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, 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.The present invention is able to improve microwave heating equipment in the uniformity of the heating of vertical direction by controlling each microwave feed-in waveguide along the size of Z-direction.The present invention can also substantially improve the uniformity of microwave heating equipment heating in the horizontal direction and prevent the operational microwave injected from any one microwave feed-in waveguide in the spilling of other microwave feed-in waveguides and lead to energy loss, while reduce the microwave leakage by inlet port and outlet port.The present invention can be used for the heating to a variety of materials, or the speed for accelerating chemical reaction.
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 microwave heating equipment.
To achieve the goals above, the technical solution adopted by the present invention are as follows:
A kind of TEn0 mould 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 TEn0 mould microwave heating equipment.
This modularized design makes the microwave heating equipment of different purposes be readily achieved modularization assembling.According to different heating power
It needs, we can choose using a heating module, can also be concatenated using two or more heating modules along Z axis.
In order to improve microwave heating equipment heating uniformity in vertical direction, on each heating module, in institute
State the lower section of cavity, and each microwave feed-in waveguide be correspondingly arranged on the shape of the cross section in a horizontal plane with it is corresponding micro-
The short circuited waveguide of the identical lower terminal shortcircuit of the shape of wave feed-in waveguide.Preferably design, size phase of each short circuited waveguide in Y-axis
Together.By adjusting the length of short circuited waveguide and the length along Z axis of each microwave feed-in waveguide, we can make work in each module
It is minimum to make the variation of microwave in the cavities vertically.
Constitute TEn0 mould 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 TEn0 mould 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 TEn0 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 microwave heating equipment, the number of the heating module is at least 2, on each heating module
The number of microwave feed-in waveguide is more than or equal to 2.Multiple microwave feed-in waveguides on each heating module are arranged along X-axis；It is all to add
The shape of the cross section of all microwave feed-in waveguides in the horizontal plane in thermal 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 TEn0 mode upwards.Ideal situation
Under, TEn0 mode is unique operating mode in all microwave feed-in waveguides described in heating module.Or TEn0 mode is main
Operating mode, power are 2 times of the power of any other mode.At this moment, in cavity the electric field of microwave mode in horizontal X-axis
Direction is still uniform, has n electric field magnitude maximum point in Z axis.At this moment, heating module is known as n mould heating module.In fact,
One n mould heating module is equivalent to n relevant basic mode heating modules and concatenates 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 TEn0 single mode transport, the level of microwave feed-in waveguide in the rectangle microwave feed-in waveguide
Cross section in face is less than n times of the wavelength of the free space of operational microwave along the length Lz of Z axis.
Electric field in order to guarantee TEn0 in the rectangle microwave feed-in waveguide is slower along Y-axis variation in vertical direction,
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 axis
Length Lz is set as 3n/5 ~ 9n/10 times of the vacuum medium wavelength of operational microwave.
In order to guarantee to realize TEn0 single mode transport in the rectangle microwave feed-in waveguide, in the horizontal plane of microwave feed-in waveguide
Cross section generally should be smaller than along the length Lx of X-axis operational microwave free space wavelength.
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 microwave heating equipment in the uniform type heated laterally along X-axis, belong on same heating module along X-axis
Microwave in the microwave feed-in waveguide of arrangement is coherent wave, and frequency spectrum is same or similar, the phase in same level
Position 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 to get on very well, the work of the microwave in microwave feed-in waveguide
Mode is TEn0 mode, and n is integer, is more than or equal to 1.The microwave when n is odd number, on the heating module adjacent along Z axis
Opposite in phase of the microwave in same level in feed-in waveguide.When n is even number, on the heating module adjacent along Z axis
Phase of the microwave in same level in the microwave feed-in waveguide 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.
Pass through the radiation leakage of the feed inlet and the discharge port to reduce microwave heating equipment, or reduces its screen
Requirement is covered, the maximum height along Y-axis of the cross section of the feed inlet and the discharge port in X/Y plane is less than operational microwave
Free space wavelength 1/2.
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 TEn0 mould 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
Integral multiple of the microwave along the distance between Z axis adjacent electric field maximum point in TEn0 mould microwave heating equipment.
The operational microwave mode that the present invention passes through in the cavity of control microwave heating equipment improves material-to-be-heated adding
The uniformity of heating in hot chamber in three dimensions prevents the microwave injected from any one microwave feed-in waveguide other micro-
The spilling of wave feed-in waveguide 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 TEn0 mould microwave heating equipment is divided into several heating module edges by us
Z axis concatenation.It preferably designs, TEn0 mode is only propagated in the different microwave feed-in waveguides in each module, direction of an electric field is only
There is X-axis component and does not change with X-axis.In this way, the uniformity of TEn0 mould microwave heating equipment along the x axis is ensured.
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 same by a microwave seed source constant amplitude
Mutually it is divided into multichannel, every road is obtained through solid-state amplifier respectively.Consider simultaneously from reduction system cost, magnetron Phase Lock Technique or master
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 length of the filter for the micro-wave screening being used in conventional microwave heating equipment.
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 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 n/2 times 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 TEn0 mould
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 n/2 times of vacuum medium wavelength of operational microwave, and the metal loss that will lead to microwave device increases, and power holds
Amount 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, Wo Menshe
3n/5 ~ 9n/10 times for setting the vacuum medium wavelength that Lz is operational microwave is proper.This design improves heating chamber and exists
The uniformity of vertical 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 TEn0 mould microwave heating equipment schematic side views.
Fig. 4 is single heating module TEn0 mould 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 TEn0 mould 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 TEn0 mould 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 TEn0 mould 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 TEn0 mould 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 TEn0 mould 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 TEn0 mould 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 TEn0 mould 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 (10)
1. a kind of TEn0 mould 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；The rectangle microwave feed-in waveguide (1) is along Z axis
Length Lz is 3n/5 ~ 9n/10 times of the wavelength of operational microwave free space, and n is integer, is more than or equal to 1；X-axis, Y-axis and Z axis structure
At rectangular coordinate system.
2. TEn0 mould 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. TEn0 mould 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. TEn0 mould microwave heating equipment according to claim 1, which is characterized in that the number of the heating module is at least
It is 1, the number of the microwave feed-in waveguide (1) on each heating module is at least 1；It is all micro- on each heating module
Wave feed-in waveguide (1) is arranged along X-axis；Different heating module is arranged along Z axis；The cavity (3) is sequentially communicated along Z axis；The institute
There is the shape of the cross section of microwave feed-in waveguide (1) in the horizontal plane all identical；All microwave feed-in waveguides (1) are in level
Being uniformly distributed respectively along X-axis and along Z axis in face.
5. TEn0 mould 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.
6. TEn0 mould microwave heating equipment according to claim 1, which is characterized in that any microwave feed-in waveguide
(1) direction of the electric field of the operating mode TEn0 mode at the sized central along Z axis of the microwave feed-in waveguide (1) with
The angle of X-axis is spent between+30 degree -30, or between 150 degree and 210 degree.
7. TEn0 mould 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.
8. TEn0 mould 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.
9. TEn0 mould 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.
10. TEn0 mould 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.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811381919.4A CN109475022A (en) | 2018-11-20 | 2018-11-20 | TEn0 mould microwave heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811381919.4A CN109475022A (en) | 2018-11-20 | 2018-11-20 | TEn0 mould microwave heating equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109475022A true CN109475022A (en) | 2019-03-15 |
Family
ID=65674124
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811381919.4A Withdrawn CN109475022A (en) | 2018-11-20 | 2018-11-20 | TEn0 mould microwave heating equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109475022A (en) |
Citations (5)
| 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 |
| US7368692B1 (en) * | 2007-01-26 | 2008-05-06 | Industrial Microwave Systems, L.L.C. | Ridged serpentine waveguide applicator |
| 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 CN201811381919.4A patent/CN109475022A/en not_active Withdrawn
Patent Citations (5)
| 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 |
| US7368692B1 (en) * | 2007-01-26 | 2008-05-06 | Industrial Microwave Systems, L.L.C. | Ridged serpentine waveguide applicator |
| 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 |
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Application publication date: 20190315 |