CN210928043U - Microwave heating device and system - Google Patents
Microwave heating device and system Download PDFInfo
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- CN210928043U CN210928043U CN201921442268.5U CN201921442268U CN210928043U CN 210928043 U CN210928043 U CN 210928043U CN 201921442268 U CN201921442268 U CN 201921442268U CN 210928043 U CN210928043 U CN 210928043U
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Abstract
The embodiment of the application discloses a microwave heating device and a microwave heating system. The microwave heating device comprises a microwave transmission line and a microwave feed-in port, wherein the microwave transmission line comprises a transmission conductor, an auxiliary medium and a transmission ground, the transmission ground is arranged around the transmission conductor to form a shielding shell, and the auxiliary medium and the transmission conductor are arranged in the shielding shell; the transmission conductor comprises a first end, and the first end of the transmission conductor penetrates through the shielding shell; the microwave feed-in port is connected with the first end; the microwave feed-in port is used for accessing a microwave signal; the shielding shell is used for placing an object to be heated; the microwave heating device is used for heating an object to be heated. The embodiment of the application realizes the miniaturization of the device and meets the requirements of diversified application scenes.
Description
Technical Field
The embodiment of the application relates to the technical field of microwave application, in particular to a microwave heating device and system.
Background
Compared with the traditional heating mode, the microwave heating mode greatly improves the utilization rate of energy sources, reduces energy loss, and has the advantages of high efficiency, environmental protection and the like. Microwave heating is therefore widely used.
Prior art microwave heating techniques are mostly based on coupling an antenna to a resonant cavity. Microwave signals are fed into the resonant cavity through the antenna, resonance is realized in the resonant cavity, and an object to be heated in the resonant cavity moves back and forth at high frequency under the action of an electromagnetic field, so that heating is realized. Because the resonant frequency is closely related to the size of the cavity, resonance is difficult to realize in a small volume, and the conventional microwave heating device is difficult to meet the requirements of diversified application scenes on the volume.
SUMMERY OF THE UTILITY MODEL
Embodiments of the present application provide a microwave heating apparatus to solve or alleviate one or more technical problems in the prior art.
As an aspect of the embodiments of the present application, a microwave heating apparatus is provided, including a microwave transmission line and a microwave feed port, where the microwave transmission line includes a transmission conductor, an auxiliary medium, and a transmission ground, the transmission ground is disposed around the transmission conductor to form a shielding shell, and the auxiliary medium and the transmission conductor are disposed in the shielding shell; the transmission conductor comprises a first end, and the first end of the transmission conductor penetrates through the shielding shell; the microwave feed-in port is connected with the first end;
the microwave feed-in port is used for accessing a microwave signal;
the shielding shell is used for placing an object to be heated;
the microwave heating device is used for heating the object to be heated.
As an aspect of embodiments of the present application, embodiments of the present application provide a microwave heating apparatus for heating an object to be heated; the microwave heating device comprises a transmission conductor, a transmission ground and a microwave feed-in port; the transmission conductor, the transmission ground and the object to be heated form a microwave transmission line; said transmission ground being disposed about said transmission conductor to form a shielded enclosure, said transmission conductor being disposed within said shielded enclosure; the shielding shell is used for placing an object to be heated;
the transmission conductor comprises a first end, and the first end of the transmission conductor penetrates through the shielding shell; the microwave feed-in port is connected with the first end; the microwave feed-in port is used for accessing microwave signals.
As an aspect of an embodiment of the present application, an embodiment of the present application provides a microwave heating system, including a microwave generator and a microwave heating apparatus provided in any embodiment of the present application; the microwave output end of the microwave generator is connected with the microwave feed-in port of the microwave heating device.
By adopting the technical scheme, the shielding shell is formed in the transmission ground in the microwave transmission line, and microwave signal energy transmitted by the microwave transmission line is absorbed and lost by an object to be heated in the process of being transmitted along the transmission conductor in the shielding shell, so that the object to be heated is heated. The transmission ground in the microwave transmission line is used as a shielding shell, and the size and the shape of the shielding shell are not limited, so that the device can be miniaturized, and the requirements of diversified application scenes are met.
The foregoing summary is provided for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of the present application will be readily apparent by reference to the drawings and following detailed description.
Drawings
In the drawings, like reference numerals refer to the same or similar parts or elements throughout the several views unless otherwise specified. The figures are not necessarily to scale. It is appreciated that these drawings depict only some embodiments in accordance with the disclosure and are therefore not to be considered limiting of its scope.
Fig. 1 shows a schematic structural diagram of a microwave heating device according to an embodiment of the present application.
Fig. 2 shows a schematic diagram of a microwave transmission section according to an embodiment of the present application.
Fig. 3 shows a schematic diagram of a microwave transmission section according to an embodiment of the present application.
Fig. 4 shows a schematic diagram of a microwave transmission end according to an embodiment of the present application.
Fig. 5 shows a schematic structural diagram of a microwave heating device according to an embodiment of the present application.
Fig. 6 shows a schematic structural diagram of a microwave heating system according to an embodiment of the present application.
Fig. 7 shows a microwave waveform diagram according to an embodiment of the present application.
Detailed Description
In the following, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present application. Accordingly, the drawings and description are to be regarded as illustrative in nature, and not as restrictive.
As an exemplary embodiment, fig. 1 shows a schematic structural diagram of a microwave heating device according to an embodiment of the present application. As shown in fig. 1, the microwave heating apparatus includes a microwave transmission line 100 and a microwave feeding port (not shown). The microwave transmission line 100 includes a transmission conductor 10, an auxiliary medium 20, and a transmission ground disposed around the transmission conductor 10 to form a shield case 40, and the auxiliary medium 20 and the transmission conductor 10 are disposed in the shield case 40. The transmission conductor 10 comprises a first end 11, the first end 11 of the transmission conductor 10 penetrates the shielding shell 40; the microwave feed port is connected with the first end 11.
The microwave feed-in port is used for accessing a microwave signal; the shield case 40 is used for placing the object 30 to be heated; the microwave heating device is used to heat the object 30 to be heated.
The microwave transmission line 100 forms a shielding shell 40 in a transmission manner, and a microwave signal accessed from the microwave feed port enters the shielding shell 40 and then is transmitted along the transmission conductor 10, so that the shielding shell can reduce the outward leakage of the microwave signal. In some embodiments, the shield shell 40 may be a fully enclosed shell or a semi-open shell. In some embodiments, the first end 11 of the transmission conductor 10 penetrates the shielding shell 40, and the first end 11 may be exposed to the outer surface of the shielding shell 40, so that the first end 11 may be coupled with a microwave signal source. For example, the first end 11 may protrude from an outer surface of the shielding shell 40, or the first end 11 may be flush with the shielding shell 40. The auxiliary medium 20 is used to fill the shield case 40 to form a microwave transmission line. The microwave signal is transmitted in the microwave transmission line 100, the object 30 to be heated is placed in the shielding shell 40, the object 30 to be heated can be regarded as a medium in the microwave transmission line, and the microwave energy is converted into heat energy to be consumed by the object 30 to be heated and the auxiliary medium 20 in the transmission process, so that the microwave heating is realized.
Wherein the auxiliary medium 20 may comprise a dielectric and/or magnetic medium and the transmission conductor 10 may comprise an electrical conductor, such as a metal. The auxiliary medium 20 may also serve to isolate the transfer conductor 10 from the object 30 to be heated, to prevent the transfer conductor 10 and the object 30 to be heated from directly contacting, causing damage to the transfer conductor 10, such as rusting, corrosion of the transfer conductor 10, or leaving harmful substances on the transfer conductor 10. In some embodiments, the secondary media 20 may comprise one or more of air, plastic, PCB board, or ceramic.
As an exemplary embodiment, the loss tangent of the object 30 to be heated is larger than that of the auxiliary medium 20, i.e., the microwave heating device is used to heat the object 30 to be heated having a loss tangent larger than that of the auxiliary medium 20. Since the loss tangent of the object 30 to be heated is larger than that of the auxiliary medium 20, energy is more lost to the object 30 to be heated, which is highly lossy, and heating of the object 30 to be heated is achieved.
Illustratively, the loss tangent of the auxiliary medium 20 is less than 0.02. The loss tangent of the auxiliary medium 20 is less than 0.02, so that the loss tangent of the auxiliary medium 20 can be ensured to be less than the loss tangent of most objects with heating requirements, and the heating requirements in most application scenes at present can be met. Further, by using the critical value of 0.02 rather than an excessively small loss tangent as the critical value, the degree of influence of the auxiliary medium 20 on the heating effect can be increased, and the adjustability of the heating effect can be improved.
The auxiliary medium 20 is illustratively air or ceramic. The loss tangent of air was 0.0009, and the loss tangent of ceramic was 0.001. Air or ceramic is a common object with a small loss tangent, so that the heating effect is ensured, and meanwhile, the cost and the realization difficulty of the microwave heating device are reduced.
As an exemplary embodiment, the present embodiment also provides a microwave heating apparatus for heating an object to be heated. The microwave heating device comprises a transmission conductor, a transmission ground and a microwave feed-in port. The transmission conductor, the transmission ground and the object to be heated form a microwave transmission line. The transmission ground is disposed around the transmission conductor to form a shield case in which the transmission conductor is disposed. The shield case is used for placing an object to be heated. The transmission conductor includes a first end, and the first end of the transmission conductor penetrates through the shielding shell. The microwave feed-in port is connected with the first end. The microwave feed-in port is used for accessing microwave signals. According to the embodiment of the application, the object to be heated can be used as a medium of a microwave transmission line, and microwave energy is lost on the object to be heated, so that heating is realized.
On the basis of any of the above embodiments, as an exemplary embodiment, the transmission conductor 10 further includes a second end, the second end is disposed in the shielding shell 40, and an open circuit or a short circuit is disposed between the second end and the shielding shell 40. The open circuit may be such that the second end is not in direct contact with the shielding shell 40 and the short circuit may be such that the second end is in direct contact with the shielding shell 40.
Illustratively, as shown in FIG. 1, the transmission conductor 10 further includes a microwave transmission section 12. The microwave transmission section 12 is disposed in the shielding shell, and the microwave transmission end 12 may be in a shape of a coil spring.
As shown in fig. 2 to 4, the microwave transmission section may also be in a meander line shape. Or a plurality of parts can be bent to form a fishfork shape or a hollow column shape. For example, as shown in fig. 4, the microwave transmitting section of the transmitting conductor is surrounded to form a columnar structure having an internal cavity. The microwave transmission section may form the columnar structure around a central axis, and the inner cavity may contain an object to be heated or an auxiliary medium. Illustratively, the microwave transmission section may be formed by bending at a plurality of locations to form the sides of the columnar structure.
The transmission conductor comprises one or more bent or spiral shapes in the shielding shell, so that a transmission path can be increased in a limited space, and the heating speed and the heating effect are improved.
As an exemplary implementation manner, the shielding shell of the embodiment of the present application includes a cover body and a container cooperating with the cover body, and the first end penetrates through the cover body or the container. As shown in fig. 5, the transmission conductor 10 may be linear. The transmission conductor 10 may be fixed above, below or at another position of the object 30 to be heated. The shield case 40 formed in a transmission manner may be formed in a square shape as a whole, and opened above the square shape, and divided into a lid 41 and a container 42, thereby facilitating taking and putting of the object 30 to be heated. A hole may be provided in the cover 41 or the container 42 to allow for a coaxial feed structure of the transmission conductor 10. The first end of the transmission conductor 10 penetrates through the cover or the container and is connected with the microwave feed-in port. It should be understood that the shield housing 40 may take other shapes as well, such as a cylinder, a table, or a cone.
For example, the auxiliary medium may be a solid medium, and the auxiliary medium is provided with a placing portion for placing an object to be heated. For example, the auxiliary medium may be ceramic, the shield case includes a lid body and a container, a transmission conductor is provided at a bottom of the container, the auxiliary medium is provided above the transmission conductor, and a placement portion of the auxiliary medium is used for placing an object to be heated. The ceramic dielectric plays a role in isolation. The shape of the placing part can be unlimited, various structures which are favorable for placing objects can be designed, and the practicability is improved.
The shielding shell can be provided with a hole, and the caliber of the hole is smaller than the wavelength of the microwave signal accessed by the microwave feed-in port. This application embodiment adopts the loss of microwave transmission line to heat, can set up the hole on the shielding shell, consequently, the microwave heating device of this application embodiment can heat the volatility object, keeps inside and outside atmospheric pressure balanced.
As an exemplary embodiment, as shown in fig. 6, a schematic structural diagram of a microwave heating system, an embodiment of the present application further provides a microwave heating system, which includes a microwave generator 50 and a microwave heating device 60 provided in any embodiment of the present application. The microwave output end of the microwave generator 50 is connected to the microwave feed-in port of the microwave heating device 60. Here, the number of the microwave generator 50 and the microwave heating device 60 may be one or more, respectively. The microwave generator 50 may include a semiconductor microwave generator or an electric vacuum microwave generator.
Illustratively, the microwave signal output by the microwave generator 50 is a continuous wave or a pulsed microwave. The pulse microwave is discontinuous wave, which can save the power consumption of the heating process while keeping the temperature stable.
Illustratively, the microwave generator 50 may include a controller 51. The controller 51 may set one or more of the waveform, frequency, operating phase, power and duty cycle of the microwave signal output by the microwave generator. For example, the controller 51 may set the microwave signal output by the microwave generator 50 to be a square wave, a sine wave, a triangular wave, or the like. The controller 51 may also set the microwave generator 50 to output a phase modulated or frequency modulated microwave signal. The free combination of various waveforms, frequencies, working phases, powers and duty ratios can correspond to various working modes. The embodiment of the present application provides the microwave generator 50 with adjustable waveform, frequency, working phase, power and duty ratio, which can flexibly adjust the heating effect of the microwave transmission line.
Illustratively, the microwave heating system may further include a power supply 70, the power supply 70 being connected to a power supply port of the microwave generator 50 for supplying power to the microwave generator 50. The power supply 70 may be a direct current power supply and may include a battery, a DC-DC power supply, an AC-DC power supply, or the like.
Illustratively, the microwave heating system may further include a human-machine interaction unit 80, and the human-machine interaction unit 80 is connected to the microwave generator 50. The human-computer interaction unit 80 may include a mouse, a keyboard, a touch screen, or a key system provided on the microwave generator, etc. The human-computer interaction unit 80 is configured to receive a control instruction of a user and output a control signal according to the control instruction of the user. The controller 51 of the microwave generator 50 sets the microwave signal output from the microwave generator 50 according to the control signal.
Illustratively, the microwave heating system may further include a network module 90, and the network module 90 is configured to record status information and usage information of the microwave heating system, and transmit the status information and the usage information to the server through the network. The status information may for example comprise the temperature of the microwave heating means or the output power of the microwave generator. The usage information may be, for example, a heating target temperature, a heating time period, a heating pattern, or the like. The network module 90 may be located inside the microwave generator 50 or outside the microwave generator 50.
Illustratively, the microwave heating system may also include a sensor 200. For example, the microwave heating system includes a temperature sensor, which may be disposed in a shielding shell of the microwave heating device, and is configured to monitor a temperature in the microwave heating device in real time, and feed the temperature back to the controller, so that the controller adjusts various working attributes of the microwave heating device according to the real-time temperature. For example, the microwave heating system includes a power sensor for detecting the transmitting power of the microwave generator and feeding back to the controller, so that the controller adjusts various operating attributes of the microwave heating device according to the transmitting power.
Illustratively, the microwave heating system may further include a microwave signal amplifier (not shown). The microwave signal amplifier may be disposed between the microwave generator and a microwave feed-in port of the microwave heating device. The microwave signal amplifier is used for amplifying the microwave signal.
Referring to fig. 7, the waveform of the microwaves transmitted by the transmission conductor is shown. The microwave energy forms a traveling wave state when traveling at the first end of the transmission conductor. The travelling wave is absorbed by the medium (including the auxiliary medium and/or the object to be heated) and converted into thermal energy while being transported. If the transmission to the second end is an open circuit state, the traveling wave may reflect back to form a standing wave or a traveling standing wave.
In the description of the present specification, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the present application and to simplify the description, and are not intended to indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and are therefore not to be considered limiting of the present application.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present application, "a plurality" means two or more unless specifically limited otherwise.
In this application, unless expressly stated or limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can include, for example, fixed connections, removable connections, or integral parts; the connection can be mechanical connection, electrical connection or communication; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
In this application, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact of the first and second features, or may comprise contact of the first and second features not directly but through another feature in between. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly above and obliquely above the second feature, or simply meaning that the first feature is at a lesser level than the second feature.
The above disclosure provides many different embodiments or examples for implementing different structures of the application. The components and arrangements of specific examples are described above to simplify the present disclosure. Of course, they are merely examples and are not intended to limit the present application. Moreover, the present application may repeat reference numerals and/or letters in the various examples, such repetition is for the purpose of simplicity and clarity and does not in itself dictate a relationship between the various embodiments and/or configurations discussed.
The above description is only for the specific embodiments of the present application, but the scope of the present application is not limited thereto, and any person skilled in the art can easily conceive various changes or substitutions within the technical scope of the present application, and these should be covered by the scope of the present application. Therefore, the protection scope of the present application shall be subject to the protection scope of the claims.
Claims (14)
1. A microwave heating device is characterized by comprising a microwave transmission line and a microwave feed-in port, wherein the microwave transmission line comprises a transmission conductor, an auxiliary medium and a transmission ground, the transmission ground is arranged around the transmission conductor to form a shielding shell, and the auxiliary medium and the transmission conductor are arranged in the shielding shell; the transmission conductor comprises a first end, and the first end of the transmission conductor penetrates through the shielding shell; the microwave feed-in port is connected with the first end;
the microwave feed-in port is used for accessing a microwave signal;
the shielding shell is used for placing an object to be heated;
the microwave heating device is used for heating the object to be heated.
2. A microwave heating apparatus according to claim 1, characterized in that the loss tangent of the object to be heated is larger than the loss tangent of the auxiliary medium.
3. A microwave heating apparatus as in claim 1 wherein the loss tangent of the auxiliary medium is less than 0.02.
4. A microwave heating apparatus as in claim 1 wherein the auxiliary medium is air or ceramic.
5. A microwave heating apparatus as in any of claims 1 to 4 wherein the transmission conductor further comprises a second end, the second end being disposed within the shielded enclosure, the second end being disposed in an open or short circuit arrangement with the shielded enclosure.
6. A microwave heating apparatus as in any of claims 1 to 4, wherein the transmission conductor further comprises a microwave transmission section disposed within the shielding shell, the microwave transmission section being in a meander line shape, a coil spring shape, a fishfork shape, or a hollow column shape.
7. A microwave heating apparatus as in any of claims 1 to 4 wherein the shielded enclosure comprises a cover and a container interfitting with the cover, the first end extending through either the cover or the container.
8. A microwave heating apparatus according to any one of claims 1 to 3, characterized in that the auxiliary medium is a solid medium, and the auxiliary medium is provided with a placing portion for placing an object to be heated.
9. A microwave heating apparatus as in any one of claims 1 to 3, characterized in that the auxiliary medium is used for isolating the transmission conductor from an object to be heated.
10. A microwave heating apparatus as in any of claims 1 to 4 wherein the shielding shell has an aperture with a diameter smaller than a wavelength of a microwave signal received at the microwave feed port.
11. A microwave heating apparatus, characterized in that the microwave heating apparatus is used for heating an object to be heated; the microwave heating device comprises a transmission conductor, a transmission ground and a microwave feed-in port; the transmission conductor, the transmission ground and the object to be heated form a microwave transmission line; said transmission ground being disposed about said transmission conductor to form a shielded enclosure, said transmission conductor being disposed within said shielded enclosure; the shielding shell is used for placing an object to be heated;
the transmission conductor comprises a first end, and the first end of the transmission conductor penetrates through the shielding shell; the microwave feed-in port is connected with the first end; the microwave feed-in port is used for accessing microwave signals.
12. A microwave heating system comprising a microwave generator and a microwave heating device according to any one of claims 1 to 11; the microwave output end of the microwave generator is connected with the microwave feed-in port of the microwave heating device.
13. A microwave heating system in accordance with claim 12 wherein the microwave signal output by the microwave generator is pulsed microwaves.
14. A microwave heating system in accordance with claim 13 wherein the microwave generator comprises a controller; the controller is used for setting one or more of waveform, frequency, working phase, power and duty ratio of the microwave signal output by the microwave generator.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201921442268.5U CN210928043U (en) | 2019-09-02 | 2019-09-02 | Microwave heating device and system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921442268.5U CN210928043U (en) | 2019-09-02 | 2019-09-02 | Microwave heating device and system |
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| CN210928043U true CN210928043U (en) | 2020-07-03 |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110621096A (en) * | 2019-09-02 | 2019-12-27 | 成都亚彦科技有限公司 | Microwave heating device and system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110621096A (en) * | 2019-09-02 | 2019-12-27 | 成都亚彦科技有限公司 | Microwave heating device and system |
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