CN110160337A - Microwave drier - Google Patents
Microwave drier Download PDFInfo
- Publication number
- CN110160337A CN110160337A CN201810149799.9A CN201810149799A CN110160337A CN 110160337 A CN110160337 A CN 110160337A CN 201810149799 A CN201810149799 A CN 201810149799A CN 110160337 A CN110160337 A CN 110160337A
- Authority
- CN
- China
- Prior art keywords
- microwave
- unit
- waveguide
- tube wall
- drying apparatus
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001035 drying Methods 0.000 claims abstract description 85
- 238000012544 monitoring process Methods 0.000 claims description 14
- 238000002955 isolation Methods 0.000 claims description 9
- 238000009826 distribution Methods 0.000 claims description 7
- 238000010521 absorption reaction Methods 0.000 claims description 5
- 238000011084 recovery Methods 0.000 claims description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 17
- 238000004519 manufacturing process Methods 0.000 description 9
- 239000000758 substrate Substances 0.000 description 8
- 238000000034 method Methods 0.000 description 5
- 239000011521 glass Substances 0.000 description 4
- 238000010438 heat treatment Methods 0.000 description 4
- 238000010924 continuous production Methods 0.000 description 3
- 230000007246 mechanism Effects 0.000 description 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 230000005855 radiation Effects 0.000 description 2
- 239000006096 absorbing agent Substances 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009835 boiling Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005672 electromagnetic field Effects 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005530 etching Methods 0.000 description 1
- 230000001678 irradiating effect Effects 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
- 238000012546 transfer Methods 0.000 description 1
- 230000007723 transport mechanism Effects 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B11/00—Machines or apparatus for drying solid materials or objects with movement which is non-progressive
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B3/00—Drying solid materials or objects by processes involving the application of heat
- F26B3/32—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action
- F26B3/34—Drying solid materials or objects by processes involving the application of heat by development of heat within the materials or objects to be dried, e.g. by fermentation or other microbiological action by using electrical effects
- F26B3/347—Electromagnetic heating, e.g. induction heating or heating using microwave energy
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Microbiology (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Health & Medical Sciences (AREA)
- Biomedical Technology (AREA)
- Biotechnology (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a kind of microwave driers, include: Microwave emission unit；Microwave irradiation unit is connect, comprising: waveguide pipe with the Microwave emission unit, wherein the waveguide pipe is with tube wall and has the irradiation space surrounded by the tube wall, and there are two slits for tool on the tube wall of the waveguide pipe；Isolated location is set between the Microwave emission unit and the microwave irradiation unit；And exhaust unit, it is connect with the waveguide pipe.Microwave drier of the invention can effectively promote the drying efficiency for work package as a result, can be applied to display panel industry, touch panel industry and solar energy module industry.
Description
Technical Field
The present invention relates to a microwave drying apparatus, and more particularly, to a microwave drying apparatus including a waveguide tube.
Background
Currently, in the process of drying glass substrates in the photovoltaic industry, a common drying device includes an air knife and a hot air blower. Wherein, the multiple groups of air knives are respectively arranged facing the upper surface and the lower surface of the glass substrate, and the hot air blower blows heated dry air or nitrogen to the substrate to blow and dry residual moisture of the substrate. The method is easy to generate water marks, time is consumed for adjusting the position of the air knife, and air disturbance is not beneficial to controlling dust falling on the substrate.
Or drying the moisture on the surface of the substrate in an oven heating mode. The method needs a longer production line to install the oven and the cooling mechanism at the rear section, and has higher power consumption.
Microwaves are electromagnetic waves having a frequency of about 300MHz to 300 GHz. The heating selectivity of the microwaves for water molecules heats and dries the moisture on the workpiece. However, most of the conventional microwave heating devices can only dry the work pieces in batch (batch), and cannot realize a continuous production line, resulting in poor working efficiency.
Disclosure of Invention
The invention aims to provide a microwave drying device to solve the problem that the traditional drying device is poor in working efficiency.
To achieve the above and other objects, the present invention provides a microwave drying apparatus, comprising:
a microwave emitting unit;
a microwave irradiation unit connected with the microwave emitting unit, comprising:
a waveguide tube having a plurality of waveguides,
the waveguide tube is provided with a tube wall and an irradiation space surrounded by the tube wall, and the tube wall of the waveguide tube is provided with two slits;
an isolation unit disposed between the microwave emitting unit and the microwave irradiation unit; and
and an exhaust unit connected to the waveguide.
In an embodiment of the invention, the width of the slit is 1-5 mm (maximum not more than 5 mm).
In an embodiment of the invention, the wave tube has a rectangular cross section.
In an embodiment of the present invention, the microwave drying apparatus further includes:
and the microwave monitoring unit is arranged in the irradiation space or between the microwave transmitting unit and the isolating unit.
In an embodiment of the present invention, the microwave drying apparatus further includes:
a microwave absorbing unit connected to the microwave irradiation unit; and
and the heat energy recovery unit is connected with the microwave absorption unit.
In an embodiment of the present invention, the microwave irradiation unit includes:
a plurality of waveguides connected in series to each other by at least one connection member,
wherein the waveguides respectively have a tube wall and an irradiation space surrounded by the tube wall, and
the tube wall of the waveguide tube is respectively provided with two slits.
In an embodiment of the present invention, the plurality of waveguides are integrally formed with the at least one connecting member.
In an embodiment of the present invention, the microwave irradiation unit includes:
a plurality of wave guide tubes connected in parallel with each other by a distribution member having at least one branch portion, a power distribution unit provided in each branch portion,
wherein the waveguides respectively have a tube wall and an irradiation space surrounded by the tube wall, and
the tube wall of the waveguide tube is respectively provided with two slits.
In an embodiment of the present invention, the plurality of waveguides are integrally formed with the distributing member.
Accordingly, the present invention provides a microwave drying apparatus that can heat a microwave absorber (e.g., water on a glass substrate) in a continuous manner using microwaves, thereby drying a workpiece to meet the needs of a manufacturer.
In addition, moisture on the workpiece is evaporated due to rapid microwave heating, heat energy does not need to be conducted through the workpiece, the length of a production line can be shortened as much as possible, and the space occupied by the system and the manufacturing cost are reduced.
In addition, the microwave drying device provided by the invention can recover heat energy generated by the manufacturing process, and effectively improve the utilization of energy.
Drawings
Fig. 1 is a schematic view of a microwave drying apparatus according to embodiment 1 of the present invention.
Fig. 2 is a side view showing an operation state of the microwave drying device according to embodiment 1 of the present invention.
Fig. 3 is a schematic view of a microwave drying apparatus according to embodiment 2 of the present invention.
Fig. 4 is a top view showing an operating state of the microwave drying device according to embodiment 3 of the present invention.
Fig. 5 is a side view showing an operation state of the microwave drying device according to embodiment 3 of the present invention.
Fig. 6 is a top view showing an operating state of the microwave drying device according to embodiment 4 of the present invention.
Fig. 7 is a side view showing an operation state of the microwave drying apparatus according to embodiment 4 of the present invention.
Detailed Description
For a fuller understanding of the objects, features and effects of the present invention, reference should be made to the following detailed description taken in conjunction with the accompanying drawings, in which:
example 1
Fig. 1 is a schematic view of a microwave drying apparatus according to embodiment 1 of the present invention. As shown in fig. 1, a microwave drying apparatus 10 according to embodiment 1 includes: a microwave emitting unit 11 for emitting microwaves; a microwave irradiation unit 12 connected to the microwave emitting unit 11, including: a waveguide 121 for guiding the microwave emitted by the microwave emitting unit 11, wherein the waveguide 121 has a tube wall 122 and an irradiation space 123 surrounded by the tube wall 122, and the tube wall of the waveguide has two slits 124; an isolation unit 13 disposed between the microwave emitting unit 11 and the microwave irradiation unit 12; and an exhaust unit 15 connected to the waveguide 121.
Referring to fig. 2, a side view of the microwave drying device according to embodiment 1 of the present invention is shown in an operating state. As shown in fig. 2, in the working state, the workpiece 50 enters and exits the irradiation space 123 through two slits 124 on the tube wall 122 of the waveguide 121, so that the workpiece 50 is dried by microwave in the irradiation space 123.
Referring to FIG. 2, the workpiece 50 is guided into and out of the irradiation space 123 by a plurality of rollers 51. The invention is not so limited and any existing transport mechanism may be used to guide the workpiece, such as: the workpiece may also be guided into and out of the irradiation space by a conveyor belt that traverses the slit.
In example 1, the waveguide 121 has a rectangular cross section. However, the present invention is not limited thereto, and may be circular, polygonal, or other shapes.
In embodiment 1, the waveguide 121 is open at an end adjacent to the microwave transmitting unit 11 to receive the microwave transmitted by the microwave transmitting unit 11; and the other end away from the microwave radiating unit 11 is closed to prevent the microwave from leaking from the end. The microwave irradiation space is formed with a working state mainly in the form of standing waves.
In the microwave drying device of embodiment 1, the provision of the isolation unit can prevent the microwave radiation unit from being damaged by the reflected microwaves, thereby extending the lifetime of the microwave radiation unit.
In the microwave drying device of embodiment 1, the exhaust unit may be configured to exhaust water vapor inside the waveguide, so as to prevent excessive accumulation of water vapor inside the waveguide during drying of the workpiece, and further improve the drying efficiency of the microwave drying device.
As can be seen from fig. 1 and 2, the microwave drying apparatus 10 of the present invention dries the workpiece 50 directly in the irradiation space 123 of the waveguide 121, which effectively reduces the space occupied by the microwave drying apparatus 10. In addition, the two slits 124 are disposed to allow the workpiece 50 to smoothly enter and exit the irradiation space 123, and to effectively prevent the microwave from leaking out of the waveguide 121. Therefore, the microwave drying device can be applied to a continuous production line (such as Roll-to-Roll) process), and can effectively improve the working efficiency of the production line.
For example, the microwave drying device of the present invention can be applied to a continuous production line in the display panel industry, the touch panel industry and the solar module industry, and the microwave drying device dries a glass substrate to be dried in the production line.
In an embodiment of the present invention, the microwave transmitting unit may include: a power supply; a microwave source; and components required for microwave transmission.
In an embodiment of the present invention, the isolation unit may include: an isolator.
In an embodiment of the present invention, the isolation unit may include: a circulator; and a terminal load.
In the microwave drying device of the present invention, the frequency and wavelength of the microwave emitted by the microwave emitting unit are not particularly limited, and those skilled in the art can appropriately adjust the frequency and wavelength according to the dimensions of the waveguide and the slit.
Preferably, when the cross-section of the waveguide is rectangular, the size of the waveguide and the frequency and wavelength of the microwave emitted from the microwave emitting unit may have the following relationship in consideration of the following factors:
preferably, the waveguide is dimensioned such that it must be larger than a certain minimum cross-section for the wavelength of the corresponding microwave signal to function properly. If the wavelength of the signal is too long (the frequency is too low) compared to the cross-sectional area of the waveguide, the electromagnetic field will not propagate efficiently. Preferably, the lowest frequency range at which the waveguide operates is one whose cross-sectional dimensions are sufficient to accommodate a maximum wavelength of the microwave signal.
When the cross-section of the waveguide is rectangular, and the length, width and height of the waveguide are x, a and b, respectively, the lower cut-off frequency (or the larger cut-off wavelength) of a specific mode can be determined by the following formula (length x has no influence on the cut-off frequency):
wherein,
a is the width of the waveguide (metric rule)
Height of waveguide (metric rule)
m is the number of changes of half wavelength in a direction
n is the number of changes of half wavelength in the direction of b
μ ═ permittivity in vacuum (8.854187817 × 10)-12Farad/metric ruler)
Epsilon-permeability in vacuum (4 pi × 10)-7N·A-2)
The internal cross-section of a commonly used standard type rectangular waveguide tube has 2: 1 (the commercially available waveguide tube WR-90 is not complete, but there are many other exceptions), or very close. The cross section size of the rectangular waveguide determines the frequency of the E-M wave conducted by the waveguide, and the larger the size of the waveguide is, the lower the working frequency is.
The standard rectangular waveguide uses WR as a start code. In the conducting mode TE1,0For example (i.e., m is 1 and n is 0), the size of the cross section of the WR284 waveguide is (7.214cm × 3.404cm), and the lower cutoff frequency is 2.078GHz after calculation. The working range of the general rectangular wave guide tube is between 125 percent and 190 percent of the lower cut-off frequency; for the WR284 example, the working range is between 2.60 and 3.95 GHz.
In principle all frequencies in the microwave range, i.e. 300 megahertz (MHz) to about 100 gigahertz (GHz), can be applied to the microwave drying apparatus of the present invention. The microwave frequencies are selected primarily based on physical size constraints, efficiency of absorption by the medium, and cost of the associated components. Accordingly, two frequencies, 915MHz and 2.45GHz (good evaporation efficiency of water molecules), are frequency bands that do not interfere with communication and are already produced and applied in mass production (e.g., in home appliances). The microwave emitting elements corresponding to the two frequencies have low cost and stable quality, so that the use of microwaves of the two frequencies in the microwave drying device of the invention is a preferred and economical choice.
Example 2
Fig. 3 is a schematic view of a microwave drying apparatus according to embodiment 2 of the present invention. As shown in fig. 3, the microwave drying apparatus 20 of example 2 includes: a microwave emitting unit 21 for emitting microwaves; a microwave irradiation unit 22 connected to the microwave emitting unit 21, including: a waveguide 221 for guiding the microwave emitted by the microwave emitting unit 21, wherein the waveguide 221 has a tube wall 222 and an irradiation space 223 surrounded by the tube wall 222, and the tube wall of the waveguide has two slits 224; an isolation unit 23 disposed between the microwave emitting unit 21 and the microwave irradiation unit 22; and an exhaust unit 25 connected to the waveguide 221.
The above-described elements of the microwave drying device 20 of embodiment 2 are the same as those of embodiment 1, and are not described again. The microwave drying apparatus 20 of example 2 further includes, compared to example 1: and a microwave monitoring unit 24 disposed in the irradiation space 223.
In an embodiment of the present invention, the microwave monitoring unit may be disposed between the microwave emitting unit and the isolating unit and/or disposed at a position in the irradiation space, where one end of the microwave monitoring unit far away from the microwave emitting unit is close to the microwave absorbing unit.
In the microwave drying device of embodiment 2, the microwave monitoring unit can be used to monitor the microwave intensity, and the user can adjust the frequency and power of the microwave emitting unit according to the measurement value of the microwave monitoring unit. Or, the control unit can be electrically connected with the microwave monitoring unit and the microwave transmitting unit, and the control unit can provide a control signal to control the frequency and the power of the microwave transmitting unit according to the monitoring signal provided by the microwave monitoring unit, so that automatic control is realized. Preferably, two microwave monitoring units may be respectively disposed at two ends of the waveguide, and the microwave intensities at the two ends of the waveguide are monitored, so as to provide more detailed monitoring information as a basis for adjusting the frequency and power of the microwave transmitting unit.
In addition, compared to embodiment 1, the microwave drying device 20 of embodiment 2 further includes: a microwave absorbing unit 26 connected to the microwave irradiation unit 22; and a thermal energy recovery unit 27 connected to the microwave absorption unit 26. The microwave irradiation space takes traveling wave as a main working state.
Unlike embodiment 1, in embodiment 2, an end of the waveguide 221 away from the microwave emitting unit 21 is opened to conduct the remaining microwave energy to the microwave absorbing unit 26.
It can be understood from the above embodiments 1 and 2 that, in the microwave drying device of the present invention, if the microwave absorbing unit is not further disposed, the end of the waveguide far from the microwave emitting unit is closed to prevent the microwave from leaking from the end; in contrast, if a microwave absorbing unit is further provided, one end of the waveguide far from the microwave emitting unit is opened to conduct the remaining microwave energy to the microwave absorbing unit. That is, in the microwave drying device of the present invention, the end of the waveguide far from the microwave emitting unit is closed or opened, depending on whether a microwave absorbing unit is further provided.
That is, the end of the waveguide far from the microwave transmitting unit is closed or opened according to design requirements.
In the microwave drying device of embodiment 2, the microwave absorbing unit may be used to absorb the remaining microwave energy, thereby further preventing the leakage of the microwave. The microwave absorbing unit internally contains a medium (e.g., water) having a good microwave absorbing ability.
In the microwave drying device according to embodiment 2, the heat energy recovery unit may be configured to recover and utilize the energy absorbed by the microwave absorption unit in the form of heat energy. For example, when the microwave absorbing unit absorbs the remaining microwave energy from water, the water inside the microwave absorbing unit can be heated by the remaining microwave energy, and the heat energy recovery unit can transfer the heated water to other devices of the production line (e.g., electroplating and etching processes) for application, thereby improving the energy application efficiency of the production line as a whole.
In the microwave drying device of the present invention, the power of the microwave emitted by the microwave emitting unit is not particularly limited, and those skilled in the art can appropriately adjust the power according to the material of the workpiece and the degree of drying the workpiece. The following is exemplified:
the formula for calculating the energy required by the evaporated water is firstly calculated by the specific heat of the water; each liter of water is heated up by one degree celsius, requiring 4.184 kilojoules (kJ) of energy. When the water is heated to boiling to 100c with this energy, about 2600 kilojoules of energy are required to convert one liter of liquid water to steam. Therefore, the energy required can be calculated using a square meter area, 0.5mm thickness moisture for example as follows:
the total volume of water is 100cm × 100cm × 0.05cm and 500cm30.5 liter ═
Assuming an initial water temperature of 20 ℃, the total energy required for evaporation is 4.184(kJ) x 0.5 x (100-20) +2600(kJ) x 0.5 x 1467.36(kJ)
If the drying is finished within 1 minute, the required power is about 1467.36/60-24.456 kJ/sec-24.456 kW; the required microwave emission source power is about 30kW, taking into account other losses of the device.
In the microwave drying device of the present invention, the widths of the two slits are not particularly limited, as long as the workpiece with a specific thickness can smoothly enter and exit the irradiation space, and the microwave with a specific frequency can be effectively prevented from leaking out of the waveguide. Preferably, the width of the slit is 1 to 5mm (not more than 5mm at the maximum).
Example 3
Fig. 4 is a top view showing an operating state of the microwave drying device of embodiment 3 of the present invention; and fig. 5 is a side view showing an operation state of the microwave drying device of embodiment 3 of the present invention. As shown in fig. 4 and 5, a microwave drying device 30 according to embodiment 3 includes: a microwave emitting unit 31 for emitting microwaves; a microwave irradiation unit 32 connected to the microwave emitting unit 31, including: a plurality of waveguides 321 connected in series by at least one connecting member 325 for guiding the microwaves emitted by the microwave emitting unit 31, wherein the waveguides 321 respectively have a tube wall 322 and an irradiation space 323 surrounded by the tube wall 322, and the tube wall 322 of the waveguide 321 respectively has two slits 324 for allowing the workpiece 50 to sequentially enter and exit the irradiation space 323 of the waveguide 322 through the slits 324, so as to dry the workpiece 50 by the microwaves in the irradiation space 323.
The microwave emitting unit 31 of the microwave drying device 30 of embodiment 3 is the same as that of embodiment 1, and is not described herein again. As shown in fig. 4 and 5, compared to embodiment 1, the microwave drying device 30 of embodiment 3 has a plurality of waveguides 321 connected in series, and the waveguides 321 are connected to each other by at least one connecting member 325, so that the microwaves emitted by the microwave emitting unit 31 can be sequentially conducted by the plurality of waveguides 321 connected in series, thereby further improving the drying efficiency of the microwave drying device 30.
In example 3, the number of waveguides connected in series is not particularly limited, and the drying efficiency of the microwave drying apparatus can be further improved by providing two or more waveguides.
In a preferred embodiment of example 3, the plurality of waveguides are formed integrally with at least one connecting member, whereby the mechanism of the microwave drying apparatus can be simplified and leakage of microwaves from the connecting portion can be prevented.
In a preferred embodiment of example 3, the microwave drying apparatus with waveguides connected in series further comprises: the isolation unit, the microwave monitoring unit and the exhaust unit as described in example 2.
In a preferred embodiment of example 3, the microwave drying apparatus with waveguides connected in series further comprises: a microwave absorbing unit and a heat energy recovering unit, wherein the microwave absorbing unit is connected with the waveguide tube at the extreme end (i.e. farthest from the microwave emitting unit) of the microwave irradiating unit.
Example 4
Fig. 6 is a top view showing an operating state of the microwave drying device of embodiment 4 of the present invention; and fig. 7 is a side view showing an operation state of the microwave drying apparatus according to embodiment 4 of the present invention. As shown in fig. 6 and 7, the microwave drying apparatus 40 according to embodiment 4 includes: a microwave emitting unit 41 for emitting microwaves; a microwave irradiation unit 42 connected to the microwave emitting unit 41, including: a plurality of waveguides 421 connected in parallel to each other by a distributing member 425 for guiding the microwaves emitted from the microwave emitting unit 41, wherein the distributing member 425 has at least one branch portion 426, and a power distributing unit 427 is disposed at each branch portion 426, thereby uniformly distributing the microwaves emitted from the microwave emitting unit 41 to the waveguides 421. The wave guide tubes 421 respectively have tube walls 422 and irradiation spaces 423 surrounded by the tube walls 422, and the tube walls 422 of the wave guide tubes 421 respectively have two slits 424 for allowing the workpiece 50 to sequentially enter and exit the irradiation spaces 423 of the wave guide tubes 422 through the slits 424, so that the workpiece 50 is dried by microwaves in the irradiation spaces 423.
The microwave emitting unit 41 of the microwave drying device 40 of embodiment 4 is the same as that of embodiment 1, and is not described herein again. As shown in fig. 6 and 7, compared to embodiment 1, the microwave drying device 40 of embodiment 4 has a plurality of waveguides 421 connected in parallel, and the waveguides 421 are connected to each other by the distribution member 425, so that the microwaves emitted from the microwave emitting unit 41 can be distributed to the plurality of waveguides 421 connected in parallel, thereby further improving the drying efficiency of the microwave drying device 40.
In example 4, the number of waveguides connected in parallel is not particularly limited, and the drying efficiency of the microwave drying apparatus can be further improved by providing two or more waveguides.
In a preferred embodiment of example 4, the plurality of waveguides are formed integrally with the distribution member, whereby the mechanism of the microwave drying apparatus can be simplified and leakage of microwaves from the connection can be avoided.
In a preferred embodiment of example 4, the microwave drying apparatus with parallel waveguides further comprises: the isolation unit, the microwave monitoring unit and the exhaust unit as described in example 2.
In a preferred embodiment of example 4, the microwave drying apparatus with parallel waveguides further comprises: the microwave absorbing unit is respectively connected to one end of each waveguide far away from the microwave transmitting unit.
The present invention has been disclosed in the foregoing as preferred embodiments, however, it will be understood by those skilled in the art that this embodiment is merely illustrative of the present invention and should not be construed as limiting the scope of the invention. It should be noted that equivalent variations and substitutions to those of the embodiments are intended to be included within the scope of the present invention. Therefore, the protection scope of the present invention is subject to the scope defined by the claims.
Claims (9)
1. A microwave drying apparatus, comprising:
a microwave emitting unit;
a microwave irradiation unit connected with the microwave emitting unit, comprising:
a waveguide tube having a plurality of waveguides,
the waveguide tube is provided with a tube wall and an irradiation space surrounded by the tube wall, and the tube wall of the waveguide tube is provided with two slits;
an isolation unit disposed between the microwave emitting unit and the microwave irradiation unit; and
and an exhaust unit connected to the waveguide.
2. A microwave drying apparatus as claimed in claim 1, wherein the width of the slit is 1 to 5 mm.
3. A microwave drying apparatus as in claim 1 wherein the waveguide has a rectangular cross section.
4. A microwave drying apparatus as in claim 1, further comprising:
and the microwave monitoring unit is arranged in the irradiation space or between the microwave transmitting unit and the isolating unit.
5. A microwave drying apparatus as in claim 1, further comprising:
a microwave absorbing unit connected to the microwave irradiation unit; and
and the heat energy recovery unit is connected with the microwave absorption unit.
6. A microwave drying apparatus as claimed in any one of claims 1 to 5, wherein the microwave irradiation unit comprises:
a plurality of waveguides connected in series to each other by at least one connection member,
wherein the waveguides respectively have a tube wall and an irradiation space surrounded by the tube wall, and
the tube wall of the waveguide tube is respectively provided with two slits.
7. A microwave drying apparatus as in claim 6 wherein the plurality of waveguides are integrally formed with the at least one connector.
8. A microwave drying apparatus as claimed in any one of claims 1 to 5, wherein the microwave irradiation unit comprises:
a plurality of wave guide tubes connected in parallel with each other by a distribution member having at least one branch portion, a power distribution unit provided in each branch portion,
wherein the waveguides respectively have a tube wall and an irradiation space surrounded by the tube wall, and
the tube wall of the waveguide tube is respectively provided with two slits.
9. A microwave drying apparatus as in claim 8 wherein the plurality of waveguides are integrally formed with the distribution member.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810149799.9A CN110160337A (en) | 2018-02-13 | 2018-02-13 | Microwave drier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810149799.9A CN110160337A (en) | 2018-02-13 | 2018-02-13 | Microwave drier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN110160337A true CN110160337A (en) | 2019-08-23 |
Family
ID=67635420
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810149799.9A Pending CN110160337A (en) | 2018-02-13 | 2018-02-13 | Microwave drier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110160337A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061294A (en) * | 2020-08-06 | 2022-02-18 | 宏硕系统股份有限公司 | Microwave drying device and treatment box thereof |
| US11619446B2 (en) | 2020-09-08 | 2023-04-04 | Wave Power Technology Inc. | Microwave drying device and processing box thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2539115Y (en) * | 2002-05-15 | 2003-03-05 | 中国石油化工股份有限公司 | Continuous microwave drier |
| GR20020100429A (en) * | 2002-10-01 | 2004-05-31 | Γεωργιος Βεκινης | Thermal conditioning method and apparatus to assist drying of wet ceramic products |
| CN1953624A (en) * | 2005-10-18 | 2007-04-25 | 华楙生化科技股份有限公司 | A micro-wave device structure with constant power output |
| CN101282600A (en) * | 2007-04-06 | 2008-10-08 | 财团法人食品工业发展研究所 | Continuous microwave heating apparatus |
| CN101652232A (en) * | 2007-03-30 | 2010-02-17 | 康宁股份有限公司 | Method and applicator for selective electromagnetic drying of ceramic-forming mixture |
| CN102128541A (en) * | 2010-01-13 | 2011-07-20 | 温国俊 | Printing and dyeing continuous microwave dryer |
| CN102202850A (en) * | 2008-10-31 | 2011-09-28 | 康宁股份有限公司 | Methods and apparatus for drying ceramic green bodies with microwaves |
| US20120160838A1 (en) * | 2010-12-23 | 2012-06-28 | Eastman Chemical Company | Wood heater with enhanced microwave dispersing and tm-mode microwave launchers |
-
2018
- 2018-02-13 CN CN201810149799.9A patent/CN110160337A/en active Pending
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2539115Y (en) * | 2002-05-15 | 2003-03-05 | 中国石油化工股份有限公司 | Continuous microwave drier |
| GR20020100429A (en) * | 2002-10-01 | 2004-05-31 | Γεωργιος Βεκινης | Thermal conditioning method and apparatus to assist drying of wet ceramic products |
| CN1953624A (en) * | 2005-10-18 | 2007-04-25 | 华楙生化科技股份有限公司 | A micro-wave device structure with constant power output |
| CN101652232A (en) * | 2007-03-30 | 2010-02-17 | 康宁股份有限公司 | Method and applicator for selective electromagnetic drying of ceramic-forming mixture |
| CN101282600A (en) * | 2007-04-06 | 2008-10-08 | 财团法人食品工业发展研究所 | Continuous microwave heating apparatus |
| CN102202850A (en) * | 2008-10-31 | 2011-09-28 | 康宁股份有限公司 | Methods and apparatus for drying ceramic green bodies with microwaves |
| CN102128541A (en) * | 2010-01-13 | 2011-07-20 | 温国俊 | Printing and dyeing continuous microwave dryer |
| US20120160838A1 (en) * | 2010-12-23 | 2012-06-28 | Eastman Chemical Company | Wood heater with enhanced microwave dispersing and tm-mode microwave launchers |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114061294A (en) * | 2020-08-06 | 2022-02-18 | 宏硕系统股份有限公司 | Microwave drying device and treatment box thereof |
| US11619446B2 (en) | 2020-09-08 | 2023-04-04 | Wave Power Technology Inc. | Microwave drying device and processing box thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| TWI641791B (en) | Microwave drying device | |
| US9504098B2 (en) | Furnace system having hybrid microwave and radiant heating | |
| US3845270A (en) | Microwave heating and vapor condensing apparatus | |
| CN202918532U (en) | Inclined roof type energy feeding microwave heating and drying device | |
| CN110160337A (en) | Microwave drier | |
| WO1983002996A1 (en) | Drying apparatus | |
| US5930914A (en) | Method and device for drying a moving web material | |
| JP6017031B2 (en) | Biomass hydrothermal liquefaction method and biomass hydrothermal liquefaction system | |
| KR102170082B1 (en) | Open type dryer | |
| CN102419077A (en) | Microwave and steam hybrid heating belt type drying kiln | |
| JP4658995B2 (en) | Microwave continuous heating device | |
| CN202420128U (en) | Belt-type drying kiln using the mixture of microwave and steam for heating | |
| CN112616213B (en) | High-efficiency waveguide slot antenna array for drying base cloth | |
| US20230131336A1 (en) | Material processing apparatus using quasi-traveling microwave to conduct heat treatment | |
| KR101683186B1 (en) | Heat supply device using microwave heat generator | |
| CN205394971U (en) | High -efficient foaming equipment | |
| KR102026562B1 (en) | Medium or Large size microwave heating furnace system applied high powered magnetron | |
| CN212628469U (en) | Microwave generating circuit for treating liquid material | |
| Resch | Drying of incense cedar pencil slats by microwave power | |
| CN210051132U (en) | Drying furnace for high-density fiberboard | |
| RU110891U1 (en) | INSTALLATION FOR MICROWAVE PROCESSING MATERIALS WITH VARIOUS DIELECTRIC PROPERTIES | |
| CN202675809U (en) | Compound drying device for light-emitting diode (LED) phosphor powder | |
| RU2702230C1 (en) | Method of hydromicas bloating and device for its implementation | |
| KR200203414Y1 (en) | The dryer with dryer for sort of textile and sort of sheet using microwave dieletric heating apparatus | |
| KR101480117B1 (en) | A heater of the air |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190823 |