CN105222180A - A kind of micro-wave oven, rectangular waveguide and defining method thereof - Google Patents
A kind of micro-wave oven, rectangular waveguide and defining method thereof Download PDFInfo
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- CN105222180A CN105222180A CN201510716812.0A CN201510716812A CN105222180A CN 105222180 A CN105222180 A CN 105222180A CN 201510716812 A CN201510716812 A CN 201510716812A CN 105222180 A CN105222180 A CN 105222180A
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Abstract
The present invention relates to field of household appliances, disclose a kind of micro-wave oven, rectangular waveguide and defining method thereof, the length range of the long limit Wlength of described rectangular waveguide is 65mm to 90mm, the length range of the broadside a of described rectangular waveguide is 70mm to 90mm, the length range of the narrow limit b of described rectangular waveguide is 30mm to 44mm, and the scope of distance Slength between the center of microwave feed-in mouth and a short circuit face of described rectangular waveguide is 25mm to 40mm, to reduce the loss of microwave in transmittance process that microwave source produces, thus both saved the efficiency that the energy turn improves micro-wave oven.
Description
Technical field
The present invention relates to field of household appliances, particularly, relate to a kind of micro-wave oven, rectangular waveguide and defining method thereof.
Background technology
Micro-wave oven is the kitchen appliance generally used in Modern Family, be used for heat or culinary art food.Micro-wave oven generally includes the parts such as power supply, microwave source, cavity, fire door.Wherein, microwave source is the core component producing microwave, and the microwave that microwave source produces needs the cavity being passed to micro-wave oven by waveguide, mostly to realize heat foods.The size of waveguide can have an impact to the loss of the microwave that microwave source produces, if size Selection is improper, the loss of microwave can be very serious, from wasting the energy and reducing use of microwave ovens efficiency.
Summary of the invention
The object of this invention is to provide a kind of micro-wave oven, rectangular waveguide and defining method thereof, this rectangular waveguide can reduce the loss of microwave in transmittance process that microwave source produces, thus has both saved the efficiency that the energy turn improves micro-wave oven.
To achieve these goals, the invention provides a kind of rectangular waveguide, the length range of the long limit Wlength of described rectangular waveguide is 65mm to 90mm, the length range of the broadside a of described rectangular waveguide is 70mm to 90mm, the length range of the narrow limit b of described rectangular waveguide is 30mm to 44mm, and the scope of distance Slength between the center of microwave feed-in mouth and a short circuit face of described rectangular waveguide is 25mm to 40mm.
Correspondingly, the present invention also provides a kind of micro-wave oven, and described micro-wave oven comprises above-mentioned rectangular waveguide.
On the other hand, the present invention also provides a kind of rectangular waveguide defining method, and described defining method comprises: three X1, X2 and X3 in the distance Slength between the center of long limit Wlength, the broadside a of described rectangular waveguide, narrow limit b and microwave feed-in mouth and a short circuit face of described rectangular waveguide are set as the value in respective preset range; Residue one X4 is changed in its preset range, and the standing wave value in the described rectangular waveguide of each change of record; Described X1, X2 and X3 are changed into other value in respective preset range, described X4 is changed in its preset range, and the standing wave value in the described rectangular waveguide of each change of record; And will the determined value of value as X4 of the X4 of minimum standing wave value be corresponded to.
Pass through technique scheme, distance between the center of the long limit of described rectangular waveguide, broadside, narrow limit and microwave feed-in mouth and a short circuit face of described rectangular waveguide is set as the value in certain limit, to reduce the loss of microwave in transmittance process that microwave source produces, thus both saved the efficiency that the energy turn improves micro-wave oven.
Other features and advantages of the present invention are described in detail in detailed description of the invention part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for description, is used from explanation the present invention, but is not construed as limiting the invention with detailed description of the invention one below.In the accompanying drawings:
Fig. 1 is the structural representation of the rectangular waveguide according to one embodiment of the present invention;
Fig. 2 is the flow chart of the determined value according to one embodiment of the present invention determination rectangular waveguide broadside a;
Fig. 3 is the curve map that waveguide standing wave changes with broadside a;
Fig. 4 is the curve map that waveguide standing wave changes with narrow limit b;
Fig. 5 is the curve map that waveguide standing wave changes with distance Slength;
Fig. 6 is the curve map that waveguide standing wave changes with long limit Wlength;
Fig. 7 is the parameter of rectangular waveguide standing wave test diagram when getting optimal value;
Fig. 8 is the position view of microwave feed-in mouth; And
The structural representation of micro-wave oven of Fig. 9 for providing according to one embodiment of the present invention.
Description of reference numerals
1 microwave feed-in mouth 2 microwave feeds out mouth
3 short circuit face 4 rectangular waveguides
The narrow limit of a broadside b
The long limit of Wlength
Distance between the center of Slength microwave feed-in mouth and short circuit face
Detailed description of the invention
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, detailed description of the invention described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
In order to provide a kind of waveguide to reduce the loss of microwave transmittance process in the waveguide, the invention provides a kind of rectangular waveguide defining method.Fig. 1 is the structural representation of the rectangular waveguide according to one embodiment of the present invention.As shown in Figure 1, in this embodiment, rectangular waveguide 4 can comprise the distance Slength between long limit Wlength, broadside a, the center of narrow limit b and microwave feed-in mouth 1 and a short circuit face 3 of described rectangular waveguide 4; The face that wherein said short circuit face can be formed for adjacent broadside and narrow limit, and can to feed out mouth 2 relative with microwave.As shown in Figure 1, microwave feed-in mouth 1 is positioned on the face that described long limit Wlength and broadside a formed.Certainly, Fig. 1 simply show schematic example, and those skilled in the art can carry out other suitable layouts to the relative position that microwave feed-in mouth 1 on rectangular waveguide 4, microwave feed out mouth 2 and short circuit face 3.
Wherein, rectangular waveguide defining method provided by the invention can comprise: three X1, X2 and X3 in the distance Slength between the center of long limit Wlength, the broadside a of described rectangular waveguide 4, narrow limit b and microwave feed-in mouth 1 and a short circuit face 3 of described rectangular waveguide 4 are set as the value in respective preset range, the face that wherein said short circuit face is formed for adjacent broadside and narrow limit; Residue one X4 is changed in its preset range, and the standing wave value in the described rectangular waveguide 4 of each change of record; Described X1, X2 and X3 are changed into other value in respective preset range, described X4 is changed in its preset range, and the standing wave value in the described rectangular waveguide 4 of each change of record; And will the determined value of value as X4 of the X4 of minimum standing wave value be corresponded to.
For X1, X2 and/or X3, adopt the above-mentioned step determining the determined value of X4, determine the determined value of described X1, X2 and/or X3, so determine the determined value of the above-mentioned parameter of rectangular waveguide 4, thus the rectangular waveguide reducing the microwave loss of transmittance process is in the waveguide provided.
Such as, Fig. 2 is the flow chart of the determined value according to one embodiment of the present invention determination rectangular waveguide broadside a.As shown in Figure 2, in step 20 place, distance Slength between the center of narrow limit b, long limit Wlength and microwave feed-in mouth 1 and the short circuit face 3 of described rectangular waveguide 4 is set in respective preset range, such as, the preset range of narrow limit b can be 30mm to 50mm, the preset range of long limit Wlength can be the preset range of 40mm to 110mm, distance Slength can be 25mm to 40mm; In step 21 place, broadside a is changed in its preset range (such as 60mm to 100mm), and the standing wave value in the described rectangular waveguide 4 of each change of record; In step 22 place, narrow limit b, long limit Wlength and distance Slength are changed into other value in respective preset range, broadside a is changed in its preset range, and the standing wave value in record each change rectangular waveguide 4; In step 23 place, the determined value of value as broadside a of the broadside a of minimum standing wave value will be corresponded to.Then, can adopt above-mentioned steps respectively for narrow limit b, long limit Wlength and distance Slength to determine its respective determined value.Can realize by emulation for above-mentioned deterministic process.
Can determine that rectangular waveguide 4 meets at least one in following item by rectangular waveguide defining method provided by the invention: the determined value (length) of described Wlength is 90mm; The determined value (length) of described a is 80mm; The determined value (length) of described b is 40mm; And the determined value of described Slength (length) is 30mm.The determined value of above-mentioned each parameter is preferred value, and the determination scope of each parameter value that the present invention also determines based on these preferred values, below will be described in detail.
Defining method provided by the invention also comprises following at least one: described X1, X2 and X3 are set as respective determined value, described X4 is changed in its preset range, and using the determination scope of the scope of the X4 corresponding to the standing wave in standing wave preset range as X4; And for X1, X2 and/or X3, adopt the above-mentioned step determining the determination scope of X4, determine the determination scope of described X1, X2 and/or X3.
The length of described Wlength is set to 90mm, and the length of described b is set to 40mm, and described Slength is set to 30mm, such as, when being changed in 60mm to 100mm by the simulation calculation broadside a change of waveguide standing wave.Fig. 3 is the curve map that waveguide standing wave changes with broadside a, (wherein abscissa is the value of broadside a, and unit is mm, and ordinate is standing wave value as shown in Figure 3, without unit), when using standing wave to weigh efficiency of transmission, standing wave is 1 to 1.04, represents that efficiency of transmission is 100%, this is theoretical value, in fact be difficult to reach, therefore, just think that when standing wave is in standing wave preset range determined value can meet the requirement of efficiency of transmission.In Fig. 3, during a=80mm, standing wave is 1.3, and represent that microwave transmission efficiency is now 98.3%, efficiency of transmission when standing wave is 1.6 is 94.7%, and when standing wave is 2, efficiency of transmission is 88.9%.So a=80mm is preferred value, and width a value can ensure efficiency of transmission (wherein, 1.9 corresponding efficiency are 90.4%) more than 90% between 70mm to 90mm, therefore, can determine that the determination scope of width a is 70mm to 90mm.
The length of described Wlength is set to 90mm, and the length of described a is set to 80mm, and described Slength is set to 30mm, such as, when being changed in 30mm to 50mm by the narrow limit b of the simulation calculation change of waveguide standing wave.Fig. 4 is the curve map that waveguide standing wave changes with narrow limit b, (wherein abscissa is the value of narrow limit b as shown in Figure 4, unit is mm, and ordinate is standing wave value, without unit), in Fig. 4, during b=40mm, standing wave is 1.2, representing that microwave transmission efficiency is now 99.2%, be preferred value, and b value can ensure that between 30mm to 44mm efficiency of transmission is more than 90%, therefore, can determine that the determination scope of narrow limit b is 30mm to 44mm.
The length of described Wlength is set to 90mm, and the length of described a is set to 80mm, and the length of described b is set to 40mm, such as, when being changed in 25mm to 40mm by the simulation calculation distance Slength change of waveguide standing wave.Fig. 5 is the curve map that waveguide standing wave changes with distance Slength, (wherein abscissa is the value of distance Slength as shown in Figure 5, unit is mm, ordinate is standing wave value, without unit), in Fig. 5, during slength=30mm, standing wave is 1.2, it is preferred value, and distance Slength value can ensure that between 25mm to 40mm efficiency of transmission is more than 90%, therefore, can determine that the determination scope of distance Slength is 25mm to 40mm.
The length of described a is set to 80mm, and the length of described b is set to 40mm, and described Slength is set to 30mm, such as, when being changed in 40mm to 110mm by the long limit Wlength of the simulation calculation change of waveguide standing wave.Fig. 6 is the curve map that waveguide standing wave changes with long limit Wlength, (wherein abscissa is the value of narrow limit b as shown in Figure 6, unit is mm, ordinate is standing wave value, without unit), in Fig. 6, during Wlength=90mm, standing wave is 1.5, for preferred value, and long limit Wlength value can ensure that between 65mm to 90mm efficiency of transmission is more than 90%, therefore, can determine that the determination scope of long limit Wlength is 65mm to 90mm.
In addition, based on the preferred value (determined value) of above-mentioned parameter, i.e. a=80mm, b=40mm, slength=30mm, Wlength=90mm, carries out the standing wave test of full frequency band in 2.4GHz-2.5GHz frequency range to it.Test result as shown in Figure 7, it illustrates the test data adopting vector network analyzer to obtain, the frequency range wherein selected is 200MHz (2.35GHz-2.55GHz, see the lower right corner in Fig. 7), in fact, in the working frequency range 2.4GHz-2.5GHz of microwave heating equipment, its standing wave value 90% controls in 1.5 (efficiencies of transmission of 96%) below.
By above-mentioned deterministic process, present invention also offers a kind of rectangular waveguide, wherein, the length range of the long limit Wlength of described rectangular waveguide is 65mm to 90mm, the length range of the broadside a of described rectangular waveguide is 70mm to 90mm, the length range of the narrow limit b of described rectangular waveguide is 30mm to 44mm, and the scope of distance Slength between the center of microwave feed-in mouth and a short circuit face of described rectangular waveguide is 25mm to 40mm, to reduce the loss of microwave in transmittance process that microwave source produces, thus both saved the efficiency that the energy turn improves micro-wave oven.。
Wherein, described Slength is the integral multiple of 1/4th of waveguide wavelength, preferably can be set to 1/4th waveguide wavelengths, as shown in Figure 8.
About the detail of rectangular waveguide and benefit identical with the above-mentioned details for rectangular waveguide defining method and benefit, repeat no more in this.
Correspondingly, the present invention also provides a kind of micro-wave oven, and wherein, described micro-wave oven comprises above-mentioned rectangular waveguide 4.Its structural representation as shown in Figure 9.
Below the preferred embodiment of the present invention is described in detail by reference to the accompanying drawings; but; the present invention is not limited to the detail in above-mentioned embodiment; within the scope of technical conceive of the present invention; can carry out multiple simple variant to technical scheme of the present invention, these simple variant all belong to protection scope of the present invention.
It should be noted that in addition, each concrete technical characteristic described in above-mentioned detailed description of the invention, in reconcilable situation, can be combined by any suitable mode, in order to avoid unnecessary repetition, the present invention illustrates no longer separately to various possible combination.
In addition, also can be combined between various different embodiment of the present invention, as long as it is without prejudice to thought of the present invention, it should be considered as content disclosed in this invention equally.
Claims (11)
1. a rectangular waveguide, it is characterized in that, the length range of the long limit Wlength of described rectangular waveguide is 65mm to 90mm, the length range of the broadside a of described rectangular waveguide is 70mm to 90mm, the length range of the narrow limit b of described rectangular waveguide is 30mm to 44mm, and the scope of distance Slength between the center of microwave feed-in mouth and a short circuit face of described rectangular waveguide is 25mm to 40mm.
2. rectangular waveguide according to claim 1, is characterized in that, described Slength is the integral multiple of 1/4th of waveguide wavelength.
3. rectangular waveguide according to claim 1, is characterized in that, described rectangular waveguide meets at least one in following item:
The length of described Wlength is 90mm;
The length of described a is 80mm;
The length of described b is 40mm; And
Described Slength is 30mm.
4. the rectangular waveguide according to any one of claim 1-3, is characterized in that, the face that described short circuit face is formed for adjacent broadside and narrow limit, and relative with described short circuit face is that microwave feeds out mouth.
5. a micro-wave oven, is characterized in that, described micro-wave oven comprises the rectangular waveguide according to any one of the claims 1 to 4.
6. micro-wave oven according to claim 5, is characterized in that, the microwave for described micro-wave oven is in the frequency range of 2.4GHz to 2.5GHz.
7. a rectangular waveguide defining method, is characterized in that, described defining method comprises:
Three X1, X2 and X3 in distance Slength between the center of long limit Wlength, the broadside a of described rectangular waveguide, narrow limit b and microwave feed-in mouth and a short circuit face of described rectangular waveguide are set as the value in respective preset range;
Residue one X4 is changed in its preset range, and the standing wave value in the described rectangular waveguide of each change of record;
Described X1, X2 and X3 are changed into other value in respective preset range, described X4 is changed in its preset range, and the standing wave value in the described rectangular waveguide of each change of record; And
The determined value of value as X4 of the X4 of minimum standing wave value will be corresponded to.
8. defining method according to claim 7, is characterized in that, described defining method also comprises:
For X1, X2 and/or X3, adopt the above-mentioned step determining the determined value of X4, determine the determined value of described X1, X2 and/or X3.
9. the defining method according to claim 7 or 8, is characterized in that, described defining method also comprises following at least one:
Described X1, X2 and X3 are set as respective determined value, described X4 is changed in its preset range, and using the determination scope of the scope of the X4 corresponding to the standing wave in standing wave preset range as X4; And
For X1, X2 and/or X3, adopt the above-mentioned step determining the determination scope of X4, determine the determination scope of described X1, X2 and/or X3.
10. defining method according to claim 9, is characterized in that, described rectangular waveguide meets at least one in following item:
The determined value of described Wlength is 90mm;
The determined value of described a is 80mm;
The determined value of described b is 40mm; And
The determined value of described Slength is 30mm.
11. defining method according to claim 10, it is characterized in that, the determination scope of described Wlength is 65mm to 90mm, and the determination scope of described a is 70mm to 90mm, the determination scope of described b is 30mm to 44mm, and the determination scope of described Slength is 25mm to 40mm.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510716812.0A CN105222180B (en) | 2015-10-28 | 2015-10-28 | A kind of micro-wave oven, rectangular waveguide and its determination method |
| PCT/CN2016/079762 WO2017071166A1 (en) | 2015-10-28 | 2016-04-20 | Microwave oven, rectangular waveguide and determination method thereof |
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| CN201510716812.0A CN105222180B (en) | 2015-10-28 | 2015-10-28 | A kind of micro-wave oven, rectangular waveguide and its determination method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2017071166A1 (en) * | 2015-10-28 | 2017-05-04 | 广东美的厨房电器制造有限公司 | Microwave oven, rectangular waveguide and determination method thereof |
| CN108767392A (en) * | 2018-05-15 | 2018-11-06 | 北京航空航天大学 | A kind of standard waveguide and microwave plasma device |
| CN109526086A (en) * | 2018-11-20 | 2019-03-26 | 成都赛纳微波科技有限公司 | Short circuited waveguide microwave heating equipment |
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| CN1731023A (en) * | 2004-08-06 | 2006-02-08 | 上海松下微波炉有限公司 | Microwave oven |
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| WO2017071166A1 (en) * | 2015-10-28 | 2017-05-04 | 广东美的厨房电器制造有限公司 | Microwave oven, rectangular waveguide and determination method thereof |
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| CN109526086A (en) * | 2018-11-20 | 2019-03-26 | 成都赛纳微波科技有限公司 | Short circuited waveguide microwave heating equipment |
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