CN106450637A - Coupling apparatus and microwave heating apparatus - Google Patents
Coupling apparatus and microwave heating apparatus Download PDFInfo
- Publication number
- CN106450637A CN106450637A CN201610890751.4A CN201610890751A CN106450637A CN 106450637 A CN106450637 A CN 106450637A CN 201610890751 A CN201610890751 A CN 201610890751A CN 106450637 A CN106450637 A CN 106450637A
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- China
- Prior art keywords
- coupling device
- antenna bar
- microwave
- polygonal
- feed
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Classifications
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01P—WAVEGUIDES; RESONATORS, LINES, OR OTHER DEVICES OF THE WAVEGUIDE TYPE
- H01P5/00—Coupling devices of the waveguide type
- H01P5/12—Coupling devices having more than two ports
- H01P5/16—Conjugate devices, i.e. devices having at least one port decoupled from one other port
-
- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
- H05B6/00—Heating by electric, magnetic or electromagnetic fields
- H05B6/64—Heating using microwaves
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- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- Constitution Of High-Frequency Heating (AREA)
Abstract
The invention relates to the technical field of microwave heating, and discloses a coupling apparatus and a microwave heating apparatus. The coupling apparatus comprises a feed-in antenna rod and a polygonal antenna rod, wherein one end of the feed-in antenna rod is connected with an inner conductor at the coaxial output end of a microwave source while the other end of the feed-in antenna rod is connected with the polygonal antenna rod; the feed-in antenna rod and an outer conductor at the coaxial output end of the microwave source are insulated; and the outer conductor is grounded. By adoption of the technical scheme, the coupling apparatus provided by the invention, through matching connection between the feed-in antenna rod and the polygonal antenna rod, can transfer microwave generated by the microwave source to to-be-heated food efficiently.
Description
Technical field
The present invention relates to microwave heating technique field, in particular it relates to a kind of coupling device and microwave heating equipment.
Background technology
From the forties in last century, invention is to send heating using microwave food, microwave frequency using magnetron to micro-wave oven so far mostly
Based on 2450 ± 50MHz.About 4000V high pressure is provided to supply magnetron to work by high-tension transformer, electric capacity, diode etc..Magnetic
Keyholed back plate, transformer expend that a large amount of copper, silicon steel etc., and volume be big, weight is high.Magnetron working life is short, microwave frequency is non-adjustable
Whole, material standard has high demands, manufacture difficulty big, limits microwave current stove efficiency and is lifted further and cost reduction.
In order to solve the problems, such as microwave magnetron stove, those skilled in the art begin one's study semiconductor microactuator wave technology
It is applied to micro-wave oven.Semiconductor microactuator wave technology is mainly used in communication at present, is frequency range with the heating using microwave application main distinction
Difference.Semiconductor microwave is applied to heat has very high technical difficulty always, main include that power is little, efficiency is low, high cost,
The problems such as feed-in cavity is difficult.But make rapid progress with the development of semiconductor microactuator wave technology, semiconductor microactuator weave efficiency more and more higher, one-tenth
This is more and more lower, weight is increasingly lighter, specific volume power density is increasing, and its application on micro-wave oven is semiconductor microactuator
The inexorable trend of wave technology development.
Content of the invention
It is an object of the invention to provide a kind of equipment, this equipment can make the microwave that microwave source produces efficiently be delivered to by
On heating food.
To achieve these goals, the present invention provides a kind of coupling device, and this coupling device includes：Feed antenna bar and many
Side shape mast, wherein said feed antenna bar one end connects the inner wire of microwave source coaxial output line, the other end with described many
Side shape mast connects；And the outer conductor insulation of described feed antenna bar and described microwave source coaxial output line, described outer lead
Body is grounded.
Further, pass through between described feed antenna bar and described polygonal antenna bar to be welded to connect or pass through bayonet socket
Connect.
Further, one end of the described feed antenna bar described inner wire of connection passes from the opening of described outer conductor, with
And the link position of described feed antenna bar and described polygonal antenna bar is 5-29mm with the distance range of described outer conductor.
Further, described polygonal antenna bar be shaped as one of following：Triangle, quadrangle, pentagon, six
Side shape.
Further, described polygonal antenna bar be shaped as rectangle.
Further, the length range of described rectangle is 30-100mm, and the scope of length-width ratio is 1:1–3:1.
Further, the impedance of this coupling device is 50 Ω or 75 Ω.
Further, the material of described feed antenna bar and described polygonal antenna bar is copper.
A kind of another aspect of the present invention, there is provided microwave heating equipment, this microwave heating equipment includes heating chamber, micro-
Wave source and above-mentioned coupling device, wherein said coupling device is used for heat described in the microwave feed-in from described microwave source
Room.
Further, described microwave source coaxial output line is the output end of semiconductor microactuator wave source or the output of radio frequency connector
End, the input of wherein said radio frequency connector connects the output end of semiconductor microactuator wave source.
By technique scheme, the coupling device providing is passed through feed antenna bar and is connected with the cooperation of polygonal antenna bar
Connect, the microwave that microwave source produces can be made efficiently to be delivered on heated food.
Other features and advantages of the present invention will be described in detail in subsequent specific embodiment part.
Brief description
Accompanying drawing is used to provide a further understanding of the present invention, and constitutes the part of specification, with following tool
Body embodiment is used for explaining the present invention together, but is not construed as limiting the invention.In the accompanying drawings：
Fig. 1 is the coupling device composition structural representation that embodiment of the present invention provides；
Fig. 2 is the coupling device composition structural representation that another embodiment of the present invention provides；And
Fig. 3 is an example standing wave curve map of the coupling device that embodiment of the present invention provides, and wherein abscissa is frequency
Rate, ordinate is standing wave value.
Description of reference numerals
1 feed antenna bar 2 polygonal antenna bar
3 inner wire 4 outer conductor
5 earth plates.
Specific embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.It should be appreciated that this place is retouched
The specific embodiment stated is merely to illustrate and explains the present invention, is not limited to the present invention.
Fig. 1 is the coupling device composition structural representation that embodiment of the present invention provides.As shown in figure 1, the present invention is implemented
Mode provides a kind of coupling device, and this coupling device includes：Feed antenna bar 1 and polygonal antenna bar 2, wherein said feed-in sky
Line bar 1 one end connects the inner wire 3 of microwave source coaxial output line, and the other end is connected with described polygonal antenna bar 2, for example, even
It is connected on the centre position of the longest edge of polygonal antenna bar 2；And described feed antenna bar 1 and described microwave source coaxial output line
Outer conductor 4 insulate, outer conductor 4 is grounded.
In embodiments, ground connection can be realized by connecting earth plate 5.For example, it is possible to by outer conductor 4 and earth plate 5
Connect；For another example, outer conductor 4 and earth plate 5 can be the different pieces of same conductor.Preferably, when by above-mentioned embodiment
When the coupling device providing is used for heating using microwave, good earth wanted by earth plate 5, preferably connects with microwave source and heating chamber directly contact
Connect.Or, such as it cannot be guaranteed that when being all directly connected to microwave source and heating chamber, at least protecting with one of microwave source and heating chamber
Hold directly contact.
In embodiments, insulation can be realized by arranging insulating materials.For example, it is possible in feed antenna bar 1 with outward
Between conductor 4, ceramic material is set, is insulated with outer conductor 4 with realizing feed antenna bar 1；For another example, can feed antenna bar 1 with
The macromolecule polymeric material of such as polytetrafluoroethylene (PTFE) (Teflon) is set between outer conductor 4, to realize feed antenna bar 1 and to lead outward
Body 4 insulate.
In embodiments, one end of feed antenna bar 1 connection inner wire 3 can pass from the opening of described outer conductor 4.
Wherein, outer conductor 4 can be the barrel shaped structure coaxial with inner wire 3, at the opening of outer conductor 4 can square with the axis to extension
Stretch.
By technique scheme, the coupling device providing is passed through feed antenna bar 1 and is connected with the cooperation of polygonal antenna bar 2
Connect, the microwave that microwave source produces can be made efficiently to be delivered on heated food.
In embodiments, the impedance configuration of coupling device can be 50 Ω or 75 Ω, in order to impedance matching.In reality
Apply in mode, the mast of feed antenna bar can select metal and low-loss material, and earth plate 5 can select metal and conduction
The good material of performance.Preferably, the material of feed antenna bar 1 and polygonal antenna bar 2 is silver, copper or its alloy, earth plate 5
Material is silver, copper or its alloy.
Fig. 2 is the coupling device composition structural representation that another embodiment of the present invention provides.As shown in Fig. 2 in reality
Apply in mode, between feed antenna bar 1 and polygonal antenna bar 2, by being welded to connect or bayonet connection can be passed through.Wherein,
Can ensure that good quality of connection by being welded to connect, can be had using the coupling device of this connected mode preferably anti-
Shake ability；By bayonet connection, then can realize modularized production, be easy to parts assembling and replace, improve production efficiency.?
In preferred embodiment, the plane that polygonal antenna bar 2 is located is parallel to outer conductor 4.
Although the polygonal antenna bar 2 of the citing illustrating in the embodiment shown in figure 2 be shaped as rectangle, this area
Technical staff could be aware that various polygons can apply to the present invention thus realizing similar coupling effect.The polygon of citing
Including but not limited to triangle, quadrangle, pentagon, hexagon etc..Preferably, polygonal shape can be following shape it
One：Equilateral triangle, square, regular hexagon etc..As an example, when polygon selects rectangle as shown in Figure 2, rectangle
Length l may range from 30-100mm, and length-width ratio l/w may range from 1:1–3:1.
In embodiments, coupling device can also include shell or outer cover (not shown), is arranged on the upper of coupling device
State component external to protect assembly.The material of this shell or outer cover can be do not affect microwave transmission glass, pottery and mould
Material.
In the embodiment shown in figure 2, impact coupling device performance mainly has three parameters：The length of squaerial bar
L, wide w and its to earth plate apart from h.Weigh efficiency of transmission with standing wave, standing wave is 1 to 1.04, and efficiency of transmission is 100%, is
Theoretical value, is extremely difficult to.Standing wave is 1.3, represents that microwave transmission efficiency now is 98.3%, and standing wave is transmission effect when 1.6
Rate is 94.7%, and when standing wave is 2, efficiency of transmission is 88.9%.In general, in order to ensure the efficient of whole microwave heating system
Rate, the efficiency of coupling device needs more than 90%.
The long l of squaerial bar be 30-100mm, in embodiments the ratio of l/w be 1 to 3, h value for 5-29mm when,
Standing wave value as table 1 below is obtained by simulation calculation：
Table 1
In table 1, the ratio of the first behavior l/w, first is classified as h value, and unit is millimeter (mm).As described above, needing to find
The parameter that standing wave value is less than 2, simultaneously takes account of error during processing, selects to be preferably selected during one group of parameter and closes on wide parameter
Also numerical value up to standard.Therefore, in upper table, when the ratio of l/w is 2, h value is for meeting design requirement during 9-23mm.Work as h=
When 14mm, w=30mm, l=60mm, with vector network analyzer actual measurement, obtain result as shown in Figure 3.
Fig. 3 is an example standing wave curve map of the coupling device that embodiment of the present invention provides, and wherein abscissa is frequency
Rate 2.4GHz-2.5GHz, ordinate is standing wave value.As shown in Figure 3 it can be seen that working as h=14mm, when w=30mm, l=60mm,
The full frequency band of the coupling device that embodiment of the present invention provides is both less than 1.4.Wherein, standing wave maximum is 1.3, and minimum of a value is
1.078, meet design requirement, it has good flatness in full frequency band simultaneously, also can guarantee that excellent property during frequency modulation work
Energy.
A kind of another aspect of the present invention, there is provided microwave heating equipment, this microwave heating equipment includes heating chamber, micro-
Wave source and above-mentioned coupling device, wherein said coupling device is used for the microwave feed-in heating chamber from described microwave source.
In embodiments, coupling device and the connected mode of the inner wire 3 of coaxial line for being indirectly connected with or can be directly connected to.Straight
In the mode connecing in succession, the microwave source coaxial output line that inner wire 3 connects is the output end of semiconductor microactuator wave source.It is being indirectly connected with
Mode in, inner wire 3 connect microwave source coaxial output line be radio frequency connector output end, wherein said radio frequency connector
Input can connect the output end of semiconductor microactuator wave source.
The coupling device that embodiment of the present invention provides has structure simply, and efficiency high, in full frequency band internal impedance characteristics one
The advantage causing.Meanwhile, tuning degree is strong in different applications.The microwave heating equipment that embodiment of the present invention provides is because of equipment
There is above-mentioned coupling device, thus have the advantages that similar.
Describe the preferred embodiment of the present invention above in association with accompanying drawing in detail, but, the present invention is not limited to above-mentioned reality
Apply the detail in mode, in the range of the technology design of the present invention, multiple letters can be carried out to technical scheme
Monotropic type, these simple variant belong to protection scope of the present invention.
It is further to note that each particular technique feature described in above-mentioned specific embodiment, in not lance
In the case of shield, can be combined by any suitable means.In order to avoid unnecessary repetition, the present invention to various can
The combination of energy no longer separately illustrates.
Additionally, can also be combined between the various different embodiment of the present invention, as long as it is without prejudice to this
The thought of invention, it equally should be considered as content disclosed in this invention.
Claims (10)
1. a kind of coupling device is it is characterised in that this coupling device includes：
Feed antenna bar and polygonal antenna bar, wherein
Described feed antenna bar one end connects the inner wire of microwave source coaxial output line, and the other end is with described polygonal antenna bar even
Connect；And
Described feed antenna bar is insulated with the outer conductor of described microwave source coaxial output line, described outer conductor ground connection.
2. coupling device according to claim 1 is it is characterised in that described feed antenna bar and described polygonal antenna bar
Between by be welded to connect or pass through bayonet connection.
3. coupling device according to claim 1 is it is characterised in that described feed antenna bar connects the one of described inner wire
End passes from the opening of described outer conductor, and the link position of described feed antenna bar and described polygonal antenna bar with described
The distance range of outer conductor is 5-29mm.
4. coupling device according to claim 1 it is characterised in that described polygonal antenna bar be shaped as following in
One：Triangle, quadrangle, pentagon, hexagon.
5. coupling device according to claim 4 it is characterised in that described polygonal antenna bar be shaped as rectangle.
6. coupling device according to claim 5 it is characterised in that described rectangle length range be 30-100mm, and
And the scope of length-width ratio is 1:1–3:1.
7. coupling device according to claim 1 is it is characterised in that the impedance of this coupling device is 50 Ω or 75 Ω.
8. coupling device according to claim 1 is it is characterised in that described feed antenna bar and described polygonal antenna bar
Material be copper.
9. a kind of microwave heating equipment is it is characterised in that this microwave heating equipment includes heating chamber, microwave source and according to right
Require the coupling device any one of 1-8, wherein said coupling device is used for the microwave feed-in from described microwave source
Described heating chamber.
10. microwave heating equipment according to claim 9 is it is characterised in that described microwave source coaxial output line is partly to lead
The output end of body microwave source or the output end of radio frequency connector, the input of wherein said radio frequency connector connects semiconductor microwave
The output end in source.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610890751.4A CN106450637A (en) | 2016-10-12 | 2016-10-12 | Coupling apparatus and microwave heating apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610890751.4A CN106450637A (en) | 2016-10-12 | 2016-10-12 | Coupling apparatus and microwave heating apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106450637A true CN106450637A (en) | 2017-02-22 |
Family
ID=58173698
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610890751.4A Pending CN106450637A (en) | 2016-10-12 | 2016-10-12 | Coupling apparatus and microwave heating apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106450637A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110141002A (en) * | 2019-06-19 | 2019-08-20 | 云南巴菰生物科技有限公司 | A kind of coaxial heating chamber and the electronic cigarette device with coaxial heating chamber |
| CN112165745A (en) * | 2020-09-30 | 2021-01-01 | 广东美的厨房电器制造有限公司 | Microwave emitting assembly, microwave heating appliance, method, device and storage medium |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645529A (en) * | 2008-08-06 | 2010-02-10 | 和硕联合科技股份有限公司 | Handheld electronic device and antenna thereof |
| CN104676675A (en) * | 2014-08-12 | 2015-06-03 | 广东美的厨房电器制造有限公司 | Microwave oven and exciter for microwave oven |
| CN205320321U (en) * | 2015-12-22 | 2016-06-15 | 广东美的厨房电器制造有限公司 | Microwave heating equipment |
-
2016
- 2016-10-12 CN CN201610890751.4A patent/CN106450637A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101645529A (en) * | 2008-08-06 | 2010-02-10 | 和硕联合科技股份有限公司 | Handheld electronic device and antenna thereof |
| CN104676675A (en) * | 2014-08-12 | 2015-06-03 | 广东美的厨房电器制造有限公司 | Microwave oven and exciter for microwave oven |
| CN205320321U (en) * | 2015-12-22 | 2016-06-15 | 广东美的厨房电器制造有限公司 | Microwave heating equipment |
Non-Patent Citations (1)
| Title |
|---|
| HUNG T. LUYEN等: "Recent Advances in Designing Balun-Free Interstitial Antennas for Minimally-Invasive Microwave Ablation", 《2015 INTERNATIONAL SYMPOSIUM ON ANTENNAS AND PROPAGATION (ISAP) <HTTPS://IEEEXPLORE.IEEE.ORG/XPL/MOSTRECENTISSUE.JSP?PUNUMBER=7442673>》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110141002A (en) * | 2019-06-19 | 2019-08-20 | 云南巴菰生物科技有限公司 | A kind of coaxial heating chamber and the electronic cigarette device with coaxial heating chamber |
| CN112165745A (en) * | 2020-09-30 | 2021-01-01 | 广东美的厨房电器制造有限公司 | Microwave emitting assembly, microwave heating appliance, method, device and storage medium |
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Application publication date: 20170222 |
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