CN1740645A - Micro-wave oven - Google Patents
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- CN1740645A CN1740645A CN 200510106933 CN200510106933A CN1740645A CN 1740645 A CN1740645 A CN 1740645A CN 200510106933 CN200510106933 CN 200510106933 CN 200510106933 A CN200510106933 A CN 200510106933A CN 1740645 A CN1740645 A CN 1740645A
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Abstract
A kind of be suitable for radiation mutually anti-phase microwave so that reach minimum micro-wave oven in response to the impedance variations of the waveguide of food load change, no matter thereby what of food load capacity all can keep microwave to export with steady state value, make the distribution of electric field in the chamber keep constant simultaneously.
Description
The application is that denomination of invention is " micro-wave oven ", and application number is 99101257.7, and the applying date is that on January 26th, 1999, application people divide an application for the application for a patent for invention of Samsung Electronics Co., Ltd.
Technical field
The present invention relates to a kind of micro-wave oven, particularly a kind of be suitable for radiation mutually anti-phase microwave so that reach minimum micro-wave oven in response to the impedance variations of the waveguide of food load change, no matter thereby what of food load capacity all can keep microwave to export with steady state value, make the distribution of electric field in the chamber keep constant simultaneously.
Background technology
Usually, micro-wave oven is used for through waveguide to the microwave of intracavitary irradiation by magnetron vibration generation, to be positioned over the food in precalculated position in the chamber by the dielectric cooking.
Fig. 1 is the cross-sectional schematic of the interior waveguide of the micro-wave oven of one embodiment of the invention, Fig. 2 is the analysis chart of the irradiation structure of waveguide among Fig. 1, wherein waveguide 1 is formed with and inserts mouth 9 and rectangular radiation hole 7, the antenna 3a of magnetron 3 is through inserting mouthful 9 insertions, and 7 radiation enter chamber 5 and microwave is through the rectangular radiation hole.
The microwave that is produced by the vibration of magnetron 3 enters chamber 5 through waveguide 1 radiation, with by the food in the dielectric cooking chamber 5.
As shown in Figure 2, if the power of magnetron 3 is P
In, and the power in precalculated position is P in the chamber 5
Out, power output P then
OutCan draw by following formula 1,2 and 3.
[formula 1]
[formula 2]
E
y＝E
ssin(x)
[formula 3]
Wherein, E
sBe the formed electric field energy of microwave (for example importing electric field energy) that produces by the vibration of magnetron 3, and E
yElectric field energy (for example exporting electric field energy) for pre-position formation in the chamber 5.The power of magnetron 3 is the E that formed by the microwave that the vibration of magnetron produces
sSquare.
In addition, the microwave that is produced by magnetron 3 vibrations is the sine wave of certain phase place, thereby determines the electric field energy E of position in the chamber 5
yBe electric field energy E
sMultiply by sin (x), and P
OutBe E
ySquare.
Therefore, power P
OutVariation with load changes.Fig. 3 is a polar diagram, and it shows the impedance operator of waveguide 1 according to the food load change.Fig. 3 is based on the microwave frequency range of 2.44-2.47GHz, and loads the water of 2000cc, 500cc and 100cc respectively.
As shown in Figure 3, under the situation that loads 2000cc water, voltage standing wave ratio (VSWR) increases.In other words, the impedance of waveguide 1 reduces to increase the power of micro-wave oven.Under the situation that loads 100cc water, voltage standing wave ratio (VSWR) reduces.In other words, the impedance of waveguide 1 increases to reduce the power of micro-wave oven.
That is to say that have a problem herein, promptly when the food load ratio was bigger, the power of micro-wave oven was high slightly, but when load hour, the impedance of waveguide increases to reduce the output of micro-wave oven.
Also have a problem in addition, i.e. the impedance of waveguide 1 changes excessive with the variation of food load, thereby makes the electric field can not constant distribution in chamber 5.
Also have a problem in addition, promptly a waveguide 1 can not be applied to different types of chamber 5, thereby independent waveguide 1 all need be adopted in each chamber 5.
For overcoming these problems, the flat 6-111933 of Japanese publication No. (being disclosed on April 22nd, 1994) is disclosed, wherein as shown in Figure 4, the two-way Wave guide system of micro-wave oven comprises upper and lower radiating aperture 11a and 11b, chamber 12, magnetron 14 and waveguide 15, and magnetron 14 is used for producing the microwave with λ g frequency through antenna 13.
At this moment, the electric wave that produces from magnetron 14 is used to form voltage standing wave(VSW), and it enters chamber 12 through radiating aperture 11a and 11b radiation successively, with even heated food.
But so there is a problem in the conventional waveguide guard system of the micro-wave oven of structure, promptly only has the diffuser efficiency of microwave better, thereby can not fully overcome the power variation of micro-wave oven with the food load change.
The Japan flat 4-233188 of publication No. (being disclosed on August 21st, 1992) discloses another kind technology before this, wherein as shown in Figure 5, the micro-wave oven that is used for two-way heating means comprises waveguide 19, upper and lower radiating aperture 21a and 21b, magnetron 23, antenna 25 and protrusion 27, and protrusion 27 is configured to have the length width much at one with antenna 25.
At this moment, radiating aperture 21a and 21b form has ultimate range, and waveguide 19 thereon side be formed with horizontal plane 19a and be formed with inclined-plane 19b in its bottom side.
In the reversible micro-wave oven of like this structure, the microwave that produces from magnetron 23 is through aerial radiation afferent echo conduit 19, and the microwave of radiation afferent echo conduit 19 forms voltage standing wave(VSW)s through protrusion 27, and it enters chamber 17 through the direct radiation of last radiating aperture 21a.The part voltage standing wave(VSW) is through following radiating aperture 21b tilted radiation, thereby evenly heats and cook food on the base plate that is positioned over chamber 17.
At this, the structural principle that is used for the waveguide 19 of anti-phase radiation can be drawn by formula 4.
[formula 4]
A-B＝(k+n·0.5)λg
Wherein, A equals the length overall of the waveguide 19 that records from the upper periphery of last radiating aperture 21a to the following peripheral of radiating aperture 21b down, B equals the length of the waveguide 19 that the upper periphery of the 29 supreme radiating aperture 21a from the axis records, the k value of equaling is the constant in the 0.7-0.9 scope, n=0,1,2,3..., and λ g equals the wavelength under waveguide 19 basic patterns.
By formula 4, length is the function of λ g, and the microwave of inequality anti-phase (+,-) is used for the food on the base plate that evenly heating and the cooking be positioned over chamber 17.
Yet, in the formula micro-wave oven, there is a problem in the traditional double of so constructing, be that the output wave conduit was both long and thick, thereby be difficult to hold electronic component, and the impedance of waveguide 19 often changes according to chamber 17, therefore, in case the change in size in chamber 17, size and the position of upper and lower radiating aperture 21a and 21b all will be adjusted and be redesigned.
In addition, also have a problem, promptly the microwave in the chamber 17 advances in the chamber with different phase radiation, and the Electric Field Distribution pattern in the chamber 17 does not form by upper and lower radiating aperture 21a and 21b integral body, but mainly forms in the upper and lower.
Summary of the invention
Of the present invention openly being addresses the above problem, and the object of the present invention is to provide a kind of structure of improving waveguide and radiating aperture with generation level in waveguide, vertical, the micro-wave oven of anti-phase microwave up and down, thereby in the chamber, form multiple Electric Field Distribution pattern, therefore can improve cooking efficiency, make the impedance variations minimum that causes by load change, and no matter how many total energys of food load keep output constant.
According to one object of the present invention, a kind of micro-wave oven with incoming wave conduit and output wave conduit is provided, this micro-wave oven comprises the magnetron in the output wave conduit, the aerial position of magnetron (A-B) is obtained by formula A-B=k λ g, wherein A equals the length overall of output wave conduit, B equals the distance from a side of output wave conduit to magnetron antenna, 0.5≤k＜0.7, and λ g equals the wavelength in the output wave conduit; D1 is the distance of the center in the hole that forms on the incoming wave conduit to last radiating aperture, and d2 is that the center in the described hole that forms on the incoming wave conduit is to the distance of radiating aperture down; D1 and d2 are obtained by following formula: d1=λ g/4, d2=λ g/2, d2=2 * d1, wherein, λ g equals the wavelength in the waveguide, and when the aerial position in described hole changed in the scope of 0.5≤k＜0.7, d1 was formed between the oblique pinnacle X1 and radiating aperture bottom line X2 of radiating aperture.
A kind of micro-wave oven with incoming wave conduit and output wave conduit is provided, this micro-wave oven comprises the magnetron in the output wave conduit, wherein, the aerial position of magnetron (A-B) is obtained by formula A-B=k λ g, wherein A equals the length overall of output wave conduit, B equals the distance from a side of output wave conduit to magnetron antenna, 0.5≤k＜0.7, and λ g equals the wavelength in the output wave conduit; D1 is the distance of the center in the hole that forms on the incoming wave conduit to last radiating aperture, and d2 is that the center in the described hole that forms on the incoming wave conduit is to the distance of radiating aperture down; D1 and d2 are obtained by following formula: d1=λ g/4, d2=λ g/2, d2=2 * d1, wherein, λ g equals the wavelength in the waveguide, and when the aerial position in described hole changed in the scope of 0.5≤k＜0.7, d2 was between the oblique pinnacle Y1 and radiating aperture bottom line Y2 of radiating aperture down.
According to another object of the present invention, a kind of micro-wave oven with incoming wave conduit and output wave conduit is provided, the output waveguide pipe has width a and the length b that is obtained by formula a=b=λ g, thereby the microwave that is produced by magnetron vibration can be along the wavelength X g distribution with one-period of a left side/right side and last/following direction.
According to another purpose of the present invention, a kind of micro-wave oven with incoming wave conduit and output wave conduit is provided, the output wave conduit comprises radiating aperture and following radiating aperture, upper and lower radiating aperture comprises:
Upright groove;
Left and right skewed slot, each flute profile becomes opposite V-arrangement, thereby around the axis P horizontal symmetrical of upright groove, and cooperate with upright groove in its two bottom, and form 30 °-60 ° of horizontal tilts; And
Translot, each groove all cooperates with a left side and right skewed slot and horizontal symmetrical be formed at at the end of left and right skewed slot.
According to another purpose of the present invention, a kind of micro-wave oven with incoming wave conduit and output wave conduit is provided, wherein the output wave conduit is formed with left radiating aperture and right radiating aperture respectively, and each hole has the groove width of g≤λ g.
Description of drawings
For fully understanding feature of the present invention and purpose, below connection with figures be described in detail, wherein:
Fig. 1 is the cross-sectional schematic of waveguide of the micro-wave oven of prior art one example;
Fig. 2 is the analysis chart of the irradiation structure of waveguide among Fig. 1;
Fig. 3 is the polar diagram that every load impedance operator of waveguide among Fig. 1 is shown;
Fig. 4 is the cross-sectional schematic of waveguide of the micro-wave oven of prior art second example;
Fig. 5 is the schematic diagram of waveguide of the reversible micro-wave oven of prior art the 3rd example;
Fig. 6 is the schematic diagram that the electric field pattern in Fig. 5 lumen is shown;
Fig. 7 to 11 illustrates the view of first embodiment of the invention, wherein
Fig. 7 illustrates the schematic diagram that the present invention is installed in the waveguide of chamber one side;
Fig. 8 illustrates the sectional view that waveguide is assemblied in magnetron;
Fig. 9 (I) and 9 (II) are front view and the side view that the confined state of the waveguide between incoming wave conduit and the output wave conduit is shown;
Figure 10 is the detail drawing of critical piece that the upper and lower radiating aperture of output wave conduit is shown;
Figure 11 A and 11B are the analysis chart that microwave distributes in the chamber;
Figure 12 and 13 is the view of second embodiment of the invention, wherein
Figure 12 (I) and 12 (II) are front view and the side view that the confined state of the waveguide between incoming wave conduit of the present invention and the output wave conduit is shown; And
Figure 13 A and 13B are the detail drawing that the main element of the left side of output wave conduit among Figure 12 and right radiating aperture is shown.
The specific embodiment
Now, describe the first embodiment of the present invention in detail with reference to Fig. 7 to 11.
Shown in Fig. 7 and 8, micro-wave oven of the present invention comprises: chamber 50 is used to hold cooked food; Magnetron 60 is used to produce the microwave with frequency lambda g; And waveguide 70, the microwave that is used for producing from magnetron 60 is through antenna 61 introduction chambers 50.
At this moment, waveguide 70 comprises incoming wave conduit 71 and output wave conduit 72, and wherein incoming wave conduit 71 is connected with magnetron 60, and the microwave that magnetron 60 is produced is delivered into output wave conduit 72.
In other words, as shown in Figure 9, incoming wave conduit 71 is positioned at the Background Region that makes progress slightly of output wave conduit 72, and is the tubaeform output wave conduit 72 that is welded in of predetermined angular, thereby is fixed together with output wave conduit 72.
The position of antenna 61 in output wave conduit 72 of magnetron 60 can be obtained by formula 5.
[formula 5]
A-B＝k·λg
Wherein, A equals the length overall (A=a=b) of output wave conduit 72, and B equals the distance from a side of output wave conduit 72 to antenna 61, and K is the constant of value 0.5≤k＜0.7 scope in, and λ g equals the interior wavelength of output wave conduit 72.
Therefore, output wave conduit 72 is configured at horizontal a and the vertical rectangle of b with equal length, thereby can exist simultaneously to the resonate wavelength of one-period of pattern (Tm type) of left and right, upper and lower transverse-electromagnetic pattern (TE type) and transverse magnetic waveguide 70 in.
In other words, when a=b=λ g, the wavelength in the waveguide 70 can be obtained by formula 6 and 7.
[formula 6]
[formula 7]
Wherein, a and b equal the width and the length of output wave conduit, and λ g equals a wavelength in the waveguide, and under the situation of λ=c/f, and c equals microwave speed and f equals microwave frequency.
According to formula 6 and 7, (λ=c/f=122mm), it also is the width a and the length b of output wave conduit 72 to the wavelength X g=136.4mm in the waveguide 70, and λ g/4=34.1mm.
At this moment, the height of whole wave guide pipe 70 (d) also is λ g/4, and wherein the height c of output wave conduit 72 is less than 10mm.
At this moment, last radiating aperture 72a upwards be arranged at around hole 71b apart from the d1 place, hole 71b is formed at incoming wave conduit 71, and down radiating aperture 72b be formed at downwards around hole 71b apart from the d2 place.
Now, d1 and d2 can be obtained by formula 8,9 and 10.
[formula 8]
d1＝λg/4
[formula 9]
d2＝λg/2
[formula 10]
d2＝2×d1
Wherein, when antenna 61 positions at hole 71b place were positioned at 0.5≤k＜0.7, d1 was formed between the oblique pinnacle X1 and radiating aperture bottom line X2 of radiating aperture 72a around hole 71b, and d2 is between the oblique pinnacle Y1 and radiating aperture bottom line Y2 of hole 71b at radiating aperture 72b down.
In addition, last radiating aperture 72a and following radiating aperture 72b form opposite V-arrangement and are symmetrical arranged around axis P.
In other words, as shown in figure 10, last radiating aperture 72a and following radiating aperture 72b are provided with upright groove 72c, a left side/right skewed slot 72d and translot 72e, a left side/right skewed slot 72d (for example relative horizontal line 30-60 degree) respectively at a predetermined angle forms, the reference line of the axis P at opposed groove 72c place becomes symmetric shape, thereby two bottom sides at upright groove 72c communicate with it, and translot 72e is formed at the outside, the end of a left side/right skewed slot 72d symmetrically, thereby communicates with it.
At this moment, the oblique angle of a left side/right skewed slot 72d is with respect to oblique pinnacle X
1, Y
1Horizontal line, on the left side is-45 °, and be on the right+45 °, and the length e on inclined-plane is λ g/4, its left side or right length f are respectively λ g/4, thereby a left side and right length f are λ g/2 when adding together.
In addition, the width g of a left side/right skewed slot 72d is a key factor of determining impedance, and forms the gap less than λ g/16, has the feature of line of rabbet joint radiation so that go up radiating aperture 72a with following radiating aperture 72b.
In other words, the width g of a left side/right skewed slot 72d should be much smaller than the wavelength X g in the waveguide 70, but should be less than or equal to the width (g) of translot 72e.
To describe so operational effect of the first embodiment of the present invention of structure below in detail.
As shown in Figure 8, when microwave when output wave conduit 72 is advanced in incoming wave conduit 71 radiation of waveguide 70, the part microwave advances the upside in chamber 50 through the last radiating aperture 72a of output wave conduit 72 radiation, and remainder then advances the downside in chamber 50 through the following radiating aperture 72b of output wave conduit 72 radiation.
At this moment, the output of micro-wave oven can be represented by the summation from the microwave energy of the last radiating aperture 72a of output wave conduit 72 and following radiating aperture 72b radiation.
Because the electric field energy through the microwave of radiating aperture 72a and 72b diffusion has symmetrical value and phase place, so the value of microwave energy is the summation through the microwave of radiating aperture 72a and 72b radiation, and its phase place setovers mutually, to produce predetermined output.
As for the distribution of microwave in chamber 50, oblique angle difference phase place because of 90 degree is opposite because microwave is at translot 72c place, and chamber 50 is entered in radiation then, therefore the crosspoint that the left side of 50 horizontal plane and right side produce anti-phase microwave in the chamber, to form various electric field patterns, shown in Figure 11 A.
Simultaneously, because oblique pinnacle X
1And Y
1Between range difference be λ g/4 (for example λ g/4=d2-d1, d1=λ g/4, d2=λ g/2), shown in Figure 11 B, therefore produces anti-phase microwave radiation mutually and enter chamber 50, and a plurality of Electric Field Distribution pattern results from the level and vertical plane in chamber 50.
Therefore, waveguide 70 of the present invention in chamber 50 on/down and the evenly spaced electromagnetic field distribution pattern of the regional generation in a left side/right side, compare with the micro-wave oven of traditional open-type waveguide or two-way type waveguide, the multiple electromagnetic field distribution pattern of generation far more than it.
As mentioned above, first embodiment of the invention has an advantage to be, can form multiple electromagnetic field distribution pattern far more than traditional two-way type micro-wave oven, thereby the impedance variations of the waveguide that will be caused by the food load change is reduced to minimum, therefore the output of micro-wave oven can remain constant level, and no matter the load of food what, the distribution of electromagnetic field in the chamber simultaneously also can keep constant.
Also having an advantage in addition is that same waveguide can be applied to various types of chambeies at an easy rate, and the cooking that the skewed slot width of only adjusting upper and lower radiating aperture place just can change in the chamber easily distributes, thereby can be exploitation waveguide and a large amount of energy and time of chamber saving.
Describe the second embodiment of the present invention in detail now with reference to Figure 12 and 13.
Be used to represent that the label identical with first embodiment of same structure and symbol are used to represent identical or equivalent parts or part, and will save unnecessary label, with simplified schematic and explanation.
According to a second embodiment of the present invention, last radiating aperture 72a and electric upside and the downside that is formed at the transverse center zone in the chamber symmetrically respectively of following radiating aperture 72b, thereby can along last/down and a left side/anti-phase microwave of right radiation, and left and right radiating aperture 73 and 74 electric left side and the right sides that are formed at the transverse center zone in the chamber 50 between upper and lower radiating aperture 72a and the 72b symmetrically respectively.
At this moment, left radiating aperture 73 is provided with: translot 73a, at last left to formation; Skewed slot 73b, from the right-hand member of translot 73a downwards at a predetermined angle (for example horizontal line 30-60 degree) relatively extend to form; And upright groove 73c, vertically extend from skewed slot 73b bottom.
Right radiating aperture 74 is provided with: upright groove 74a, vertical end formed thereon; Skewed slot 74b, (for example horizontal line 30-60 degree) relatively extends to form from the bottom of upright groove 74a at a predetermined angle; And translot 74c, extend to form to the right from the bottom of skewed slot 74b.
As shown in figure 13, skewed slot 73b and 74b respectively with relative horizontal line become+angles of 45 degree form, and the wavelength X g of its width g in the waveguide 70, but are less than or equal to the width (g) of translot 73a and 74c and upright groove 73c and 74a.
In other words, be formed at a left side/right radiating aperture 73 and form with oblique angle identical with skewed slot 72d and width g with 74b with 74 skewed slot 73b, skewed slot 72d is formed at upper and lower radiating aperture 72a and 72b.
In addition, a left side/right radiating aperture 73 and 74 is separately positioned on the left side and the right side of output wave conduit 72, thereby is positioned at by vertical b of output wave conduit 72 and the horizontal net region that forms with even interval λ g/4 of a.
To describe so operational effect of the second embodiment of the present invention of structure below in detail.
When the microwave that produces by the vibration of magnetron 60 when the incoming wave conduit 71 of waveguide 70 sends output wave conduit 72, it is inboard that the part microwave diffuses into going up of chamber 50 through the last radiating aperture 72a of output wave conduit 72, and remainder then enters the following inboard in chamber 50 through the following radiating aperture 72b of output wave conduit 72 radiation.
In addition, the part microwave enters the left inboard of chamber 50 through left radiating aperture 73 radiation of output wave conduit 72, and remainder enters the Right Inboard in chamber 50 through right radiating aperture 74 radiation of output wave conduit 72.
At this moment, the output of micro-wave oven can be represented by the summation from the microwave energy of upper and lower radiating aperture 72a and 72b and a left side and right radiating aperture 73 and 74 radiation.Because the energy of electromagnetic field through the microwave of upper and lower a, left side and right radiating aperture 72a, 72b, 73 and 74 radiation has symmetrical phase place and value, therefore the value of microwave energy is the summation through the microwave of upper and lower radiating aperture 72a and 72b and a left side and right radiating aperture 73 and 74 radiation, and its phase place is setovered mutually, to produce predetermined output.
In other words, as shown in figure 12, the interior wavelength X g of the horizontal a of output wave conduit 72 and vertical b length and waveguide 70 is identical, so the electromagnetic field pattern has 4, and when output wave conduit 72 during vertical and horizontal subdivision, will produce 16 mesh shapes by the interval of λ g/4.
At this moment, last radiating aperture 72a is positioned at two grids of central part, and radiating aperture 72b is positioned at other two grids of central area down down.Left side radiating aperture 73 is positioned at the second left top, and right radiating aperture 74 is positioned at the second right top.
Simultaneously, ask the operation characteristic of upper and lower radiating aperture 72a of concern and 72b and a left side and right radiating aperture 73 and 74 once.Last radiating aperture 72a and following radiating aperture 72b form identical shaped and are symmetrical arranged around axis P, and its flute length L is λ g/2, and highly h is λ g/4, and groove width g is g≤λ g.
In addition, the electromagnetic field distribution 75a in skewed slot 72d, the 73b of upper and lower radiating aperture 72a and 72b and a left side and right radiating aperture 73 and 74 and 74b and the output wave conduit 72,75b, the central point of 75c and 75d is horizontal or vertical relative.
In other words, as the incline direction and the electromagnetic field distribution 75a of the groove of last radiating aperture 72a, magnetic field is exported in output magnetic field when the central point of 75b is vertically opposite, and the incline direction of the groove of radiating aperture 72b and electromagnetic field distribution 75c instantly when the central point level of 75d is relative.
As mentioned above, electromagnetic field and magnetic field differ 90 degree on its phase characteristic, so the impedance operator of groove (phase place) differs 90 degree, thus compensation and be offset the variation of impedance.
In addition, left and right radiating aperture 73 and 74 flute length L and the high h of groove are respectively λ g/4, and groove width is g≤λ g.
At this moment, left side radiating aperture 73 is vertically opposite with the central point of electromagnetic field distribution 75c and 75d on the incline direction of its groove, thereby cause the generation in magnetic field, and right radiating aperture 74 is relative with the central point level of electromagnetic field distribution 75c and 75d on the incline direction of its groove, thereby causes the generation in magnetic field.
Therefore, according to waveguide 70 of the present invention, evenly spaced electromagnetic field distribution pattern produces in chamber 50 with left/right and up/down direction, thereby forms the multiple electromagnetic field distribution pattern far more than traditional open type waveguide or reversible waveguide.
In addition, output wave conduit 72 is provided with/following radiating aperture 72a the bigger gain and the directional characteristic of antenna increase of the comparable single groove radiation of groove arrangement antenna of a 72b and a left side/right radiating aperture 73,74, thereby the output performance and the cooking efficiency of raising micro-wave oven.
From the second embodiment of the present invention as can be known, its advantage is that structural design is to make the microwave that is produced by the magnetron vibration send the into incoming wave conduit of rectangular waveguide, simultaneously through last/down and a left side/right radiating aperture send the into interior zone in chamber, thereby by last/down and more than the microwave of a left side/right radiating aperture radiation/time and a left side/right opposite phases radiation, therefore form far more than the electromagnetic field distribution pattern of traditional double to the formula micro-wave oven, and will reduce to minimum according to the impedance variations of the waveguide of food load change, thereby, simultaneously electromagnetic field distribution in the chamber is remained predeterminated level no matter what can keep the output of microwave constant to load.
Claims (12)
1. micro-wave oven with incoming wave conduit and output wave conduit, output wave conduit comprise radiating aperture and following radiating aperture, it is characterized in that upper and lower radiating aperture comprises:
Upright groove;
Left and right skewed slot, each flute profile becomes opposite V-arrangement, thereby cooperates with upright groove around the axis P horizontal symmetrical of upright groove and in its two bottom, and forms 30 °-60 ° of horizontal tilts; And
Translot, each groove all cooperates with a left side and right skewed slot and horizontal symmetrical be formed at at the end of left and right skewed slot.
2. micro-wave oven as claimed in claim 1 is characterized in that, left and right skewed slot is respectively around oblique pinnacle X
1, Y
1The horizontal line on the left side with-45 ° of formation, and on the right with+45 ° of formation.
3. micro-wave oven as claimed in claim 1 is characterized in that, the chamfer length e at left and right skewed slot place is λ g/4, and λ g equals the wavelength in the waveguide.
4. micro-wave oven as claimed in claim 1 is characterized in that, the left and right directions length f at left and right skewed slot place is λ g/4 based on axis P, and λ g equals the wavelength in the waveguide, and the length overall of a left side and right skewed slot is λ g/2.
5. micro-wave oven as claimed in claim 1 is characterized in that, the width g of left and right skewed slot is less than λ g/16, and λ g equals the wavelength in the waveguide.
6. micro-wave oven as claimed in claim 1 is characterized in that, width g left and right skewed slot is less than or equal to the height h of translot less than the wavelength X g in the waveguide.
7. micro-wave oven as claimed in claim 1, it is characterized in that, the output waveguide pipe has width a and the length b that is obtained by formula a=b=λ g, thereby the microwave that is produced by the magnetron vibration can distribute in the wavelength X g of one-period along left and right directions and above-below direction, and λ g equals the wavelength in the waveguide.
8. micro-wave oven as claimed in claim 1, it is characterized in that the output wave conduit is formed with left radiating aperture and right radiating aperture in the middle left and right directions side of side, chamber respectively, the groove width g in each hole has g≤λ g, thereby anti-phase microwave radiation is advanced in the chamber, and λ g equals the wavelength in the waveguide.
9. micro-wave oven as claimed in claim 8 is characterized in that, left radiating aperture comprises:
Translot, left is to formation thereon;
Skewed slot extends to form with pre-fixed inclination downwards from the right-hand member of translot; And
Upright groove vertically extends from the skewed slot bottom.
10. micro-wave oven as claimed in claim 8 is characterized in that, right radiating aperture comprises:
Upright groove, vertical end formed thereon;
Skewed slot extends to form with pre-fixed inclination from upright bottom land end; And
Translot extends to form to the right from the skewed slot bottom.
11. micro-wave oven as claimed in claim 8, it is characterized in that, left and right radiating aperture is formed at the left side and the right side of output wave conduit respectively, thereby is positioned at by the horizontal a of output wave conduit and the vertical net region that forms with even interval λ g/4 of b, and λ g equals the interior wavelength of waveguide.
12. as claim 9 or 10 described micro-wave ovens, it is characterized in that, the oblique angle of skewed slot based on horizontal line form+45 °.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510106933XA CN100365345C (en) | 1999-01-26 | 1999-01-26 | Microwave oven |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB200510106933XA CN100365345C (en) | 1999-01-26 | 1999-01-26 | Microwave oven |
Related Parent Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 99101257 Division CN1244769C (en) | 1999-01-26 | 1999-01-26 | Microwave oven |
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| Publication Number | Publication Date |
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| CN1740645A true CN1740645A (en) | 2006-03-01 |
| CN100365345C CN100365345C (en) | 2008-01-30 |
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|---|---|---|---|
| CNB200510106933XA Expired - Fee Related CN100365345C (en) | 1999-01-26 | 1999-01-26 | Microwave oven |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106031305A (en) * | 2014-03-25 | 2016-10-12 | 松下知识产权经营株式会社 | Microwave processing apparatus |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6050492U (en) * | 1983-09-13 | 1985-04-09 | 三洋電機株式会社 | microwave oven |
| SE465495B (en) * | 1990-09-21 | 1991-09-16 | Whirlpool Int | MICROWAVE OVEN, METHOD FOR EXCITING THE CAVITY IN A MICROWAVE OVEN, AND GUIDANCE MANUAL FOR THE IMPLEMENTATION OF THE METHOD |
| KR950003782B1 (en) * | 1992-08-25 | 1995-04-18 | 주식회사금성사 | Microwave range with a two-way heating system |
| KR200141222Y1 (en) * | 1993-10-13 | 1999-03-20 | 구자홍 | Control device of microwave for oven |
| JPH08138858A (en) * | 1994-11-08 | 1996-05-31 | Sanyo Electric Co Ltd | Microwave oven |
| CN1204449A (en) * | 1995-11-10 | 1999-01-06 | 大宇电子株式会社 | Waveguide having improved structure used in microwave oven |
| KR19980017873A (en) * | 1996-08-31 | 1998-06-05 | 배순훈 | Microwave Waveguide Structure |
-
1999
- 1999-01-26 CN CNB200510106933XA patent/CN100365345C/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106031305A (en) * | 2014-03-25 | 2016-10-12 | 松下知识产权经营株式会社 | Microwave processing apparatus |
| US10362641B2 (en) | 2014-03-25 | 2019-07-23 | Panasonic Intellectual Property Management Co., Ltd. | Microwave treatment apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100365345C (en) | 2008-01-30 |
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