CN109302764A - Waveguide feed-in microwave heating equipment - Google Patents

Abstract

The major part of microwave heating equipment is divided into several heating modules and concatenated along Z axis by the present invention.Basic mode TE10 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.We 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, n is more than or equal to 2.The present invention can be used for the heating to a variety of materials, or the speed for accelerating chemical reaction.

Description

Waveguide feed-in microwave heating equipment

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 waveguide feed-in microwave heating equipment.

To achieve the goals above, the technical solution adopted by the present invention are as follows:

A kind of waveguide feed-in 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 of waveguide feed-in microwave heating equipment Chamber.This modularized design makes the waveguide feed-in microwave heating equipment of different purposes be readily achieved modularization assembling.According to difference The needs of heating power, we can choose using a heating module, can also be using two or more heating modules along Z axis Concatenation.

In order to improve waveguide feed-in 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 cross section of each microwave feed-in waveguide along the size of Z axis, we can be with Keep the variation of operational microwave in the cavities vertically in each module minimum.

Waveguide feed-in microwave heating equipment is constituted, further includes one and is located at the left side of leftmost heating module and adds with this Thermal modules the cavity connection feed inlet and one be located at rightmost heating module the right and with the heating module The discharge port of cavity connection and one run through the feed inlet, the cavity of all heating modules and it is described go out Material 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 waveguide feed-in microwave heating equipment.The door-plate can be to Outer opening, it is material-to-be-heated convenient for being sent into or taking out.

For Large Waveguide feed-in microwave heating equipment, the number of the heating module is at least 2, each heating The number of microwave feed-in waveguide in module is more than or equal to 2.Multiple microwave feed-in waveguides on each heating module are arranged along X-axis Column.

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 cross section in the horizontal plane of waveguide be greater than along the length Lz of Z axis operational microwave free space wavelength 1/2.

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 TE10 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 3/5 ~ 9/10 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 waveguide feed-in microwave heating equipment in the uniform type heated laterally along X-axis, belongs to same heating module On along X-axis arrangement the microwave feed-in waveguide in microwave be coherent wave, frequency spectrum is same or similar, in same level Phase in face 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 opposite in phase in same level, or difference is between 150 degree and 210 degree.

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 waveguide feed-in microwave heating equipment by the radiation leakage of the feed inlet and the discharge port, or Its shielding requirements is reduced, 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 The 1/2 of the wavelength of the free space of operational 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 waveguide feed-in microwave heating equipment Heating object can be located at cavity bottom conveyer belt drive under be parallel to Z axis or so periodic oscillations.

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 wave Microwave is led in feed-in microwave heating equipment along the integral multiple of the distance between Z axis adjacent electric field maximum point.

Operational microwave mode in cavity of the present invention by controlling waveguide feed-in microwave heating equipment is heated to improve The uniformity of heating of the material in heating chamber in three dimensions prevents the microwave injected from any one microwave feed-in waveguide Other microwave feed-in waveguides spilling and lead to energy loss, while reducing through the microwave leakages of inlet port and outlet port.

In order to reach the goals above, the major part of waveguide feed-in microwave heating equipment is divided into several heating modules by us It is concatenated along Z axis.It preferably designs, basic mode TE10 mode, electric field is only propagated in the different microwave feed-in waveguides in each module There was only X-axis component and do not change with X-axis in direction.In this way, the uniformity of waveguide feed-in microwave heating equipment along the x axis obtains It ensures.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 a microwave seed With multichannel is mutually divided into, every road is obtained through solid-state amplifier source constant amplitude respectively.Consider simultaneously from reduction system cost, magnetron locking phase Technology or main vibration magnifier technology have 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 common waveguide feed-in microwave heating equipment 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 waveguide feed-in 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 and presents in waveguide Enter the 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. Certainly, 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, 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 3/5 ~ 9/10 times for setting the vacuum medium wavelength that Lz is operational microwave is proper.This design improves heating chamber and is hanging down Uniformity of the histogram to 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 waveguide feed-in microwave heating equipment schematic side views.

Fig. 4 is single heating module waveguide feed-in 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 waveguide feed-in 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 waveguide feed-in 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 waveguide feed-in microwave heating equipment, including 5 heating modules.Any heating module includes a sky Chamber 3,4 along X-axis arrangement above the cavity 3 are connected to and to the microwave of its feed-in microwave energy with the cavity 3 Feed-in waveguide.Microwave energy is supplied to each microwave feed-in waveguide by each microwave load point first from extraneous operational microwave. Different heating module is arranged along Z axis, and 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.

Waveguide feed-in microwave heating equipment is constituted, further includes one and is located at the left side of leftmost heating module and adds with this Feed inlet 4 that the cavitys 3 of thermal modules is connected to and one be located at the right of the heating module of rightmost and with the heating module The cavity 3 be connected to discharge port 5 and one run through the feed inlet 4,3 He of the cavity of all heating modules The discharge port 5 is used to transport 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.

It is material-to-be-heated with the microwave interactive time in order to increase, in the waveguide feed-in 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 waveguide feed-in 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 waveguide feed-in 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 waveguide feed-in microwave heating equipment, which is characterized in that including at least one heating module, the heating module packet A cavity (3) is included, is located above the cavity (3), at least one of axis along the y axis is connected to simultaneously with the cavity (3) Microwave feed-in waveguide (1) to the cavity (3) feed-in microwave energy；Each heating module passes through the respective cavity (3) it is sequentially communicated along Z-direction；All microwave feed-in waveguides (1) on each heating module arrange along X-axis；All heating modules On the shape of all microwave feed-in waveguides (1) cross section in the horizontal plane be rectangle；X-axis, Y-axis and Z axis form right angle are sat Mark system.

2. waveguide feed-in microwave heating equipment according to claim 1, which is characterized in that in each heating module On, in the underface of the cavity (3), in the horizontal plane transversal is correspondingly arranged on each microwave feed-in waveguide (1) The short circuited waveguide (10) of the shape in face and the identical lower terminal shortcircuit of shape of corresponding microwave feed-in waveguide (1)；All short circuits Waveguide (10) is identical in the size of Y direction.

3. waveguide feed-in microwave heating equipment according to claim 1, which is characterized in that further include one and be located at Far Left Heating module the left side and the feed inlet (4) being connected to the cavity (3) of the heating module and one be located at rightmost The right of heating module 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. waveguide feed-in 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. waveguide feed-in 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. waveguide feed-in 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. waveguide feed-in microwave heating equipment described in any one according to claim 1, which is characterized in that the rectangle microwave Feed-in waveguide (1) is along 3/5 ~ 9/10 times of wavelength that the length Lz of Z axis is operational microwave free space.

8. waveguide feed-in 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. waveguide feed-in microwave heating equipment according to claim 1, which is characterized in that belong on same heating module The operational microwave that transmits downwards is coherent wave along 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. waveguide feed-in microwave heating equipment according to claim 1, which is characterized in that the heating module adjacent along Z axis On 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 one horizontal plane.