CN106329054B - Coupling device and microwave heating equipment - Google Patents
Coupling device and microwave heating equipment Download PDFInfo
- Publication number
- CN106329054B CN106329054B CN201610750045.XA CN201610750045A CN106329054B CN 106329054 B CN106329054 B CN 106329054B CN 201610750045 A CN201610750045 A CN 201610750045A CN 106329054 B CN106329054 B CN 106329054B
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- Prior art keywords
- feed
- coupling device
- antenna bar
- helical antenna
- microwave
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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
Abstract
The present invention relates to microwave heating technique field, a kind of coupling device and microwave heating equipment are disclosed.Wherein, coupling device includes: feed-in section and helical antenna bar, wherein the helical antenna bar includes spire and bar portion；Feed-in section one end connects the inner conductor of microwave source coaxial output line, and the other end is connect with the spire of the helical antenna bar；The bar portion of the helical antenna bar connects the outer conductor of the microwave source coaxial output line and ground connection；And the outer conductor insulation of the feed-in section and the microwave source coaxial output line.Through the above technical solutions, the coupling device provided passes through the mating connection of feed-in section and helical antenna bar, the microwave that microwave source can be made to generate, which is efficiently transmitted to, to be heated on food.
Description
Technical field
The present invention relates to microwave heating technique fields, and in particular, to a kind of coupling device and microwave heating equipment.
Background technique
Micro-wave oven is to issue microwave heating food, microwave frequency using magnetron mostly so far from the invention forties in last century
Based on 2450 ± 50MHz.It is worked by the offers such as high-tension transformer, capacitor, diode about 4000V high pressure for magnetron.Magnetic
Keyholed back plate, transformer expend a large amount of copper, silicon steel etc., and volume is big, weight is high.Magnetron working life is short, microwave frequency is non-adjustable
Whole, material standard requires that high, manufacture difficulty is big, limits microwave current furnace efficiency and further promotes and cost reduction.
In order to solve the problems, such as that microwave magnetron furnace exists, those skilled in the art begin one's study semiconductor microactuator wave technology
Applied to micro-wave oven.Semiconductor microactuator wave technology is mainly used in communication at present, is frequency range with the microwave heating application main distinction
Difference.Semiconductor microwave is applied to heating and always exists very high technical difficulty, mainly include power is small, low efficiency, it is at high cost,
The problems such as feed-in cavity is difficult.But make rapid progress as semiconductor microactuator wave technology develops, semiconductor microactuator weave efficiency is higher and higher, at
This lower and lower, weight is increasingly lighter, specific volume power density is increasing, and the application on micro-wave oven is semiconductor microactuator
The inexorable trend of wave technology development.
Summary of the invention
The object of the present invention is to provide a kind of equipment, the equipment can make microwave source generate microwave be efficiently transmitted to by
It heats on food.
To achieve the goals above, the present invention provides a kind of coupling device, which includes: feed-in section and spiral day
Line bar, wherein the helical antenna bar includes spire and bar portion；Feed-in section one end connects microwave source coaxial output line
Inner conductor, the other end are connect with the spire of the helical antenna bar；The bar portion of the helical antenna bar connects the microwave source
The outer conductor of coaxial output line and ground connection；And the outer conductor insulation of the feed-in section and the microwave source coaxial output line.
Further, the feed-in section includes feed antenna bar and parallel mast, wherein feed antenna bar one end
The inner conductor of the microwave source coaxial output line is connected, the other end is vertical with one end of the parallel antenna bar to be connect；And institute
The other end for stating parallel antenna bar is connect with the spire of the helical antenna bar；
Further, between the feed antenna bar and the parallel antenna bar and/or the parallel antenna bar with it is described
By being welded to connect or passing through bayonet connection between helical antenna bar.
Further, one end that the feed-in section connects the inner conductor is pierced by from the opening of the outer conductor, Yi Jisuo
The distance range of the link position and the outer conductor of stating feed-in section and the spire is 9-15mm.
Further, the spiral spacing of the spire of the helical antenna bar is 5-10mm, helical length 4-10mm.
Further, the spiral number of turns of the spire of the helical antenna bar are 2-5.5.
Further, the impedance of the coupling device is 50 Ω or 75 Ω.
Further, the material of the feed-in section and the helical antenna bar is copper.
Another aspect of the present invention provides a kind of microwave heating equipment, which includes heating room, micro-
Wave source and above-mentioned coupling device, wherein the coupling device described in the microwave feed-in from the microwave source for that will heat
Room.
Further, the microwave source coaxial output line is the output of the output end or radio frequency connector of semiconductor microactuator wave source
End, wherein the output end of the input terminal connection semiconductor microactuator wave source of the radio frequency connector.
Through the above technical solutions, the coupling device provided passes through the mating connection of feed-in section and helical antenna bar, it can
The microwave for generating microwave source, which is efficiently transmitted to, to be heated on food.
Other features and advantages of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
The drawings are intended to provide a further understanding of the invention, and constitutes part of specification, with following tool
Body embodiment is used to explain the present invention together, but is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the coupling device composed structure schematic diagram that embodiment of the present invention provides；
Fig. 2 is the coupling device composed structure schematic diagram that another embodiment of the present invention provides；
Fig. 3 is an example standing wave curve graph of the coupling device that embodiment of the present invention provides, and wherein abscissa is h,
Ordinate is standing wave value；
Fig. 4 is another example standing wave curve graph for the coupling device that embodiment of the present invention provides, and wherein abscissa is
Spiral number of turns, ordinate are standing wave value；And
Fig. 5 is the full frequency band standing wave curve graph for the coupling device that embodiment of the present invention provides.
Description of symbols
1 feed-in section, 2 helical antenna bar
11 feed antenna bar, 12 parallel antenna bar
3 inner conductor, 4 outer conductor
5 earth plates.
Specific embodiment
Below in conjunction with attached drawing, detailed description of the preferred embodiments.It should be understood that this place is retouched
The specific embodiment stated is merely to illustrate and explain the present invention, and is not intended to restrict the invention.
Fig. 1 is the coupling device composed structure schematic diagram that embodiment of the present invention provides.As shown in Figure 1, the present invention is implemented
Mode provides a kind of coupling device, which includes: feed-in section 1 and helical antenna bar 2, wherein the helical antenna bar 2
Including spire (helical antenna bar top in figure) and bar portion (helical antenna bar lower part in figure)；1 one end of feed-in section connection
The inner conductor 3 of microwave source coaxial output line, the other end are connect with the spire of the helical antenna bar 2；The helical antenna bar 2
Bar portion connect the outer conductor 4 of the microwave source coaxial output line and be grounded；And the feed-in section 1 and the microwave source it is coaxial
The outer conductor 4 of output end insulate.
In embodiments, ground connection can be realized by connection earth plate 5.For example, can be by outer conductor 4 and earth plate 5
The bar portion of helical antenna bar 2, then connect by connection with outer conductor 4；For another example, outer conductor 4 can be connect with earth plate 5, and
And the bar portion of helical antenna bar 2 is connect with earth plate 5.Preferably, it is used when by the coupling device provided in above embodiment
When microwave heating, earth plate 5 wants good earth, preferably directly connects with microwave source and heating room.Alternatively, cannot such as protect
When card and microwave source and heating room are all directly connected to, at least keep directly contacting with one of microwave source and heating room.
In embodiments, insulation can be realized by setting insulating materials.For example, can be in feed-in section 1 and outer conductor 4
Between ceramic material is set, to realize that feed-in section 1 and outer conductor 4 insulate；For another example, it can be set between feed-in section 1 and outer conductor 4
The macromolecule polymeric material of such as polytetrafluoroethylene (PTFE) (Teflon) is set, to realize that feed-in section 1 and outer conductor 4 insulate.
In embodiments, one end that feed-in section 1 connects inner conductor 3 can be pierced by from the opening of the outer conductor 4.Its
In, outer conductor 4 can be the barrel shaped structure coaxial with inner conductor 3, and the opening of outer conductor 4 square with the axis can extend outwardly,
The bar portion of helical antenna bar 2 can connect (for example, vertical connection) on the extension of outer conductor 4.In embodiments, it is
Convenient for connection, L shape shape can be set by feed-in section 1, in order to be pierced by from the opening of outer conductor 4 and and helical antenna
Bar 2 connects.
Through the above technical solutions, the coupling device provided passes through the mating connection of feed-in section 1 and helical antenna bar 2, energy
The microwave for enough generating microwave source, which is efficiently transmitted to, to be heated on food.
It in embodiments, can be 50 Ω or 75 Ω by the impedance configuration of coupling device, in order to impedance matching.In reality
It applies in mode, the mast of feed-in section can select metal and low-loss material, and earth plate 5 can select metal and electric conductivity
Good material.Preferably, the material of feed-in section 1 and helical antenna bar 2 is silver, copper or its alloy, the material of earth plate 5 be silver,
Copper or its alloy.
Fig. 2 is the coupling device composed structure schematic diagram that another embodiment of the present invention provides.As shown in Fig. 2, in reality
It applies in mode, feed-in section 1 shown in Fig. 1 may include feed antenna bar 11 and parallel mast 12, wherein the feed-in day
11 one end of line bar connects the inner conductor 3 of the microwave source coaxial output line, and one end of the other end and the parallel antenna bar 12 is hung down
It is direct-connected to connect；And the other end of the parallel antenna bar 12 is connect with the spire of the helical antenna bar 2.
In embodiments, between feed antenna bar 11 and parallel antenna bar 12 and/or parallel antenna bar 12 and spiral day
It can be by being welded to connect or passing through bayonet connection between line bar 3.Wherein, it can guarantee good connection by being welded to connect
Quality can have preferable shock resistance using the coupling device of this connection type；By bayonet connection, then may be implemented
Modularized production is assembled and is replaced convenient for components, improves production efficiency.
In embodiments, coupling device can also include shell or outer cover (not shown), and the upper of coupling device is arranged in
Component external is stated to protect component.The material of the shell or outer cover can be the glass, ceramics and modeling for not influencing microwave transmission
Material.
Another aspect of the present invention provides a kind of microwave heating equipment, which includes heating room, micro-
Wave source and above-mentioned coupling device, wherein the coupling device will be for that will heat room from the microwave feed-in of the microwave source.
In embodiments, the connection type of the inner conductor 3 of coupling device and coaxial line can be to be indirectly connected with or be directly connected to.Straight
In the mode connect in succession, the microwave source coaxial output line that inner conductor 3 connects is the output end of semiconductor microactuator wave source.It is being indirectly connected with
Mode in, inner conductor 3 connect microwave source coaxial output line be radio frequency connector output end, wherein the radio frequency connector
Input terminal can connect the output end of semiconductor microactuator wave source.
Fig. 3 is an example standing wave curve graph of the coupling device that embodiment of the present invention provides, and wherein abscissa is h,
Ordinate is standing wave value.In the embodiment shown in fig. 3, the connection of feed-in section 1 (or parallel antenna 12) and helical antenna bar 3
Position is variable with 4 distance h of outer conductor, and when the circle number of helical antenna bar is 5 circles, spiral spacing is 5mm, and the height of spiral is
8mm, when the length of horizontal antenna bar is 10mm, available h- standing wave value relational graph as shown in Figure 3.Wherein, variable h can also
To be depicted as parallel antenna 12 at a distance from outer conductor 4.
Efficiency of transmission is measured with standing wave, standing wave is 1 to 1.04, and efficiency of transmission 100% is theoretical value, is extremely difficult to.It stays
Wave is 1.3, indicates that microwave transmission efficiency at this time is 98.3%；Microwave transmission efficiency when standing wave is 1.6 is 94.7%；Standing wave
When being 2, efficiency of transmission 88.9%.In general, in order to guarantee the high efficiency of entire microwave heating system, the effect of coupling device
Rate is needed 90% or more, in such a case, it is possible to select h for 9mm to 15mm.
Fig. 4 is another example standing wave curve graph for the coupling device that embodiment of the present invention provides, and wherein abscissa is
Spiral number of turns, ordinate are standing wave value.In the embodiment shown in fig. 3, the circle number of helical antenna bar is variable, as fixed h
For 15mm, spiral spacing is 5mm, and the height of spiral is 8mm, available such as Fig. 4 institute when the length of horizontal antenna bar is 10mm
The spiral number of turns shown-standing wave value relational graph.It can be seen that standing wave value can be met the requirements in the range of 2 circles to 5.5 circle,
In, 3 circle and 5.5 circle when, standing wave value is best.
It is surveyed by inventor, the link position of feed-in section and spire in the coupling device that embodiment of the present invention provides
Distance range with outer conductor can be 9-15mm, and the spiral spacing of the spire of helical antenna bar can be 5-10mm, spiral
Height can be 4-10mm, and the spiral number of turns of the spire of helical antenna bar can be 2-5.5.
Fig. 5 is the full frequency band standing wave curve graph for the coupling device that embodiment of the present invention provides.As shown in figure 5, of the invention
Embodiment provide coupling device standing wave value in full frequency band all close to 1.3, it is functional.
The coupling device that embodiment of the present invention provides has structure simple, high-efficient, in full frequency band internal impedance characteristics one
The advantages of cause.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 has the advantages that similar.
It is described the prefered embodiments of the present invention in detail above in conjunction with attached drawing, still, the present invention is not limited to above-mentioned realities
The detail in mode is applied, within the scope of the technical concept of the present invention, a variety of letters can be carried out to technical solution of the present invention
Monotropic type, these simple variants all belong to the scope of protection of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, the present invention to it is various can
No further explanation will be given for the combination of energy.
In addition, various embodiments of the present invention can be combined randomly, as long as it is without prejudice to originally
The thought of invention, it should also be regarded as the disclosure of the present invention.
Claims (9)
1. a kind of coupling device, which is characterized in that the coupling device includes:
Feed-in section and helical antenna bar, wherein
The helical antenna bar includes spire and bar portion；
Feed-in section one end connects the inner conductor of microwave source coaxial output line, the spire of the other end and the helical antenna bar
Connection；
The bar portion of the helical antenna bar connects the outer conductor of the microwave source coaxial output line and ground connection；And
The outer conductor of the feed-in section and the microwave source coaxial output line insulate,
The feed-in section includes feed antenna bar and parallel mast, wherein
Feed antenna bar one end connects the inner conductor of the microwave source coaxial output line, the other end and the parallel antenna bar
One end vertically connect；And
The other end of the parallel antenna bar is connect with the spire of the helical antenna bar.
2. coupling device according to claim 1, which is characterized in that the feed antenna bar and the parallel antenna bar it
Between and/or the parallel antenna bar and the helical antenna bar between by being welded to connect or passing through bayonet connection.
3. coupling device according to claim 1, which is characterized in that the feed-in section connect one end of the inner conductor from
The opening of the outer conductor is pierced by and feed-in section model at a distance from the link position and the outer conductor of the spire
It encloses for 9-15mm.
4. coupling device according to claim 1, which is characterized in that the spiral spacing of the spire of the helical antenna bar
For 5-10mm, helical length 4-10mm.
5. coupling device according to claim 4, which is characterized in that the spiral number of turns of the spire of the helical antenna bar
For 2-5.5.
6. coupling device according to claim 1, which is characterized in that the impedance of the coupling device is 50 Ω or 75 Ω.
7. coupling device according to claim 1, which is characterized in that the material of the feed-in section and the helical antenna bar
For copper.
8. a kind of microwave heating equipment, which is characterized in that the microwave heating equipment includes heating room, microwave source and according to right
It is required that coupling device described in any one of 1-7, wherein the coupling device is for will be from the microwave feed-in of the microwave source
The heating room.
9. microwave heating equipment according to claim 8, which is characterized in that the microwave source coaxial output line is semiconductor
The output end of microwave source or the output end of radio frequency connector, wherein the input terminal of the radio frequency connector connects semiconductor microactuator wave source
Output end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610750045.XA CN106329054B (en) | 2016-08-29 | 2016-08-29 | Coupling device and microwave heating equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610750045.XA CN106329054B (en) | 2016-08-29 | 2016-08-29 | Coupling device and microwave heating equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106329054A CN106329054A (en) | 2017-01-11 |
| CN106329054B true CN106329054B (en) | 2019-01-22 |
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ID=57788600
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610750045.XA Active CN106329054B (en) | 2016-08-29 | 2016-08-29 | Coupling device and microwave heating equipment |
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| Country | Link |
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| CN (1) | CN106329054B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112165745B (en) * | 2020-09-30 | 2023-01-31 | 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 |
|---|---|---|---|---|
| CN1528107A (en) * | 2000-10-18 | 2004-09-08 | Seb公司 | Device for heating a material by microwave application |
| CN104685715A (en) * | 2012-09-13 | 2015-06-03 | 高知有限公司 | RF oven with inverted F antenna |
| CN105509109A (en) * | 2016-02-01 | 2016-04-20 | 广东美的厨房电器制造有限公司 | Microwave oven |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR100346158B1 (en) * | 1998-09-14 | 2002-11-07 | 삼성전자 주식회사 | Microwave Radiation Structure for Microwave Oven |
-
2016
- 2016-08-29 CN CN201610750045.XA patent/CN106329054B/en active Active
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1528107A (en) * | 2000-10-18 | 2004-09-08 | Seb公司 | Device for heating a material by microwave application |
| CN104685715A (en) * | 2012-09-13 | 2015-06-03 | 高知有限公司 | RF oven with inverted F antenna |
| CN105509109A (en) * | 2016-02-01 | 2016-04-20 | 广东美的厨房电器制造有限公司 | Microwave oven |
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| Publication number | Publication date |
|---|---|
| CN106329054A (en) | 2017-01-11 |
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