CN105491702A - Antenna for microwave heating equipment and microwave oven - Google Patents
Antenna for microwave heating equipment and microwave oven Download PDFInfo
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- CN105491702A CN105491702A CN201610070493.5A CN201610070493A CN105491702A CN 105491702 A CN105491702 A CN 105491702A CN 201610070493 A CN201610070493 A CN 201610070493A CN 105491702 A CN105491702 A CN 105491702A
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- microwave
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- 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
- H05B6/72—Radiators or antennas
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Abstract
The invention relates to the field of household electric appliances, and discloses an antenna for microwave heating equipment and a microwave oven. The antenna comprises an antenna mast (1), the antenna mast (1) is provided with a feed-in terminal (11) for being connected with a microwave source of the microwave heating equipment and an emission terminal (12) for emitting microwaves to a heating chamber of the microwave heating equipment, and the antenna mast (1) extends in an outward manner along the direction from the feed-in terminal (11) to the emission terminal (12) so that the area of an end surface of the emission terminal (12) is larger than the area of an end surface of the feed-in terminal (11). The microwaves are fed in to the antenna from the feed-in terminal (11) of the antenna mast (1) and transmitted to the emission terminal (12) via a structure of diffusion and extension so that outputted microwaves can be uniformly emitted to the inner side of the heating chamber with high efficiency. According to the antenna, the directivity is good, the transmission efficiency is high, the antenna can be used in semiconductor microwave ovens, the energy consumption is reduced, the structure can be simplified, and the security is improved.
Description
Technical field
The present invention relates to household appliance technical field, particularly, relate to a kind of antenna for microwave heating equipment.On this basis, the invention still further relates to the microwave oven with described antenna.
Background technology
Microwave oven is one of cooking kitchen range common in modern society, its general principle be utilize antenna to be produced by microwave source (also known as " microwave generator ") microwave transmission in heating chamber (i.e. cooking cavity), and microwave field is set up in this heating chamber, to make the orientation of the polar molecule (as water, fat, protein etc.) in food with microwave field quick shift, this variation makes adjacent molecule interphase interaction, produce the effect of similar friction, thus heat food.By this principle of heating, microwave oven can evenly, cooking food rapidly, be thus used widely.
According to the difference of microwave source, microwave oven can be divided into microwave magnetron stove and semiconductor microwave oven again.Wherein, microwave magnetron stove easily can obtain HIGH-POWERED MICROWAVES with it and obtain tremendous development in the conventional technology.And semiconductor microwave oven utilizes semiconductor microwave generator to produce microwave, power is lower.Record according to pertinent literature, semiconductor device at least differs three orders of magnitude in acquisition microwave high power compared with magnetron.Although thus semiconductor microwave oven has that structure is simple, fail safe is high, low cost and other advantages, microwave uses at heating art and is still predicted to be mainly microwave magnetron stove.In addition, due to microwave source working mechanism with produce the greatest differences of microwave power aspect, make to be difficult in the technical development of semiconductor microwave oven directly to convert parts in microwave magnetron stove and technology, and need carry out specific aim, adaptive minute design.This is because magnetron is as self-oscillation vacuum device, and peripheral matching structure and need for environment and magnetron are configured to global design, namely the minor variations in structure and size can affect the power stage of magnetron; And semiconductor microactuator wave source is the device for being amplified by small-signal microwave, all completely different in each side such as structure, principle, performance and effects from magnetron, the design criterion of the two is different, causes technology therebetween to be converted and has feasibility hardly.
In microwave oven disclosed in Chinese invention patent CN102767854B, in order to overcome the low technical problem of microwave power, be provided with two or more semiconductor microwave generator, and by each self-corresponding antenna transmission microwave.Although its by improve wave guide box structure suitably simplify above-mentioned technological improvement bring complex structure, problem that volume is larger, but the structure of this microwave oven is comparatively complicated (comprising two power supplys, two semiconductor microwave generator etc.) still, and inevitably there is the interactional problem of microwave.In addition, this set is in fact that magnet controlled microwave source higher for capacity efficiency is become the lower semiconductor-type microwave source of multiple capacity efficiency, compare conventional magnetron type micro-wave stove and only can improve fail safe, for energy savings, reduce costs and do not play remarkable result, even may cause the consequence that cost goes up not down.
In view of this, be necessary to improve above-mentioned prior art, to solve wherein Problems existing.
Summary of the invention
The actual technical problem that will solve of the present invention be how to reduce microwave heating equipment (as microwave oven) energy consumption and make its designs simplification.
In order to solve the problems of the technologies described above, one aspect of the present invention provides a kind of antenna for microwave heating equipment, this antenna comprises mast, this mast has the feed side of the microwave source for connecting described microwave heating equipment and the transmitting terminal for the heating chamber launched microwave to described microwave heating equipment, and this mast is along extending out extension from described feed side to the direction of described transmitting terminal, with the face area making the face area of described transmitting terminal be greater than described feed side.
Preferably, described mast has at the feed-in section near side, described feed side, the transmitter section near described transmitting terminal side and changeover portion between described feed-in section and this transmitter section, wherein, the cross-sectional area size of described feed-in section and described transmitter section is constant separately.
Preferably, described feed-in section and described transmitter section have cylindrical structural respectively, and described changeover portion has truncated cone structure.
Preferably, described mast meets following at least one: the diameter of described feed-in section is 2mm ~ 4mm, and length is 8mm ~ 14mm; The diameter of described transmitter section is 4mm ~ 7mm, and length is 5mm ~ 9mm; The tapering of described changeover portion is 1:7 ~ 1:3.
Preferably, described antenna also comprises the ground plate with the setting insulated from each other of described mast, this ground plate be formed with the endoporus that passes for microwave transmission path and with described heating chamber altogether.
Another aspect of the present invention also provides a kind of microwave oven, this microwave oven has above-mentioned antenna provided by the invention, the semiconductor microwave generator as described microwave source and the cooking chamber as described heating chamber, the described feed side of described mast is connected to the power take-off of described semiconductor microwave generator, with can from described transmitting terminal to described cooking cavity indoor transmissions microwave.
Preferably, described antenna also comprises the ground plate with the setting insulated from each other of described mast, this ground plate be formed with the endoporus that passes for microwave transmission path and with described cooking chamber altogether.
Preferably, described ground plate is connected to shell or the pedestal of described semiconductor microwave generator.
Preferably, described ground plate is connected to shell or the pedestal of described semiconductor microwave generator by the outer conductor of the radio frequency connector arranged in pairs, and the described feed side of described mast is connected to the power take-off of described semiconductor microwave generator by the inner wire of described radio frequency connector.
Preferably, described antenna is connected to described semiconductor microwave generator by the radio frequency connector arranged in pairs, wherein, is connected with radio frequency cable between the described radio frequency connector arranged in pairs.
Preferably, described microwave oven also comprises wave guide box, this wave guide box is connected in the outside wall surface of described cooking chamber, and described ground plate is fitted in the side away from described cooking chamber of this wave guide box, and the described transmitting terminal of described mast is stretched in this wave guide box.
Preferably, described ground plate has the kink of the outside wall surface for engaging described cooking chamber.
Preferably, the described transmitting terminal of described mast stretches to described cooking cavity indoor, and the internal face of this cooking chamber is provided with the block piece for the protection of described mast.
By technique scheme, after microwave is fed into antenna from mast feed side, the structure extended through diffusion is transmitted to transmitting terminal, makes the microwave exported to be emitted in heating chamber evenly, efficiently.Antenna directivity provided by the invention is good, and efficiency of transmission is high, be convenient to in such as semiconductor microwave oven to reduce energy ezpenditure, and be convenient to simplified structure, improve fail safe.
Other features and advantages of the present invention are described in detail in embodiment part subsequently.
Accompanying drawing explanation
Accompanying drawing is used to provide a further understanding of the present invention, and forms a part for specification, is used from explanation the present invention, but is not construed as limiting the invention with embodiment one below.In the accompanying drawings:
Fig. 1 is the structural representation of the antenna according to a kind of preferred implementation of the present invention;
Fig. 2 a and Fig. 2 b is stereogram and the front view of the mast of antenna in Fig. 1 respectively;
Fig. 3 a and Fig. 3 b is the connection diagram of antenna in Fig. 1 and semiconductor microwave generator respectively;
Fig. 4 is the syndeton schematic diagram of the microwave oven according to the first execution mode of the present invention;
Fig. 5 is the syndeton schematic diagram of the microwave oven according to the second execution mode of the present invention;
Fig. 6 is the syndeton schematic diagram of the microwave oven according to the third execution mode of the present invention;
Fig. 7 is the syndeton schematic diagram of the microwave oven according to the present invention's the 4th kind of execution mode;
Fig. 8 is the stationary wave characteristic figure of the antenna of microwave oven according to a kind of preferred implementation of the present invention.
Description of reference numerals
1 mast 11 feed side
12 transmitting terminal 13 feed-in sections
14 transmitter section 15 changeover portions
2 ground plate 21 kinks
3 semiconductor microwave generator 4 cook chamber
5 radio frequency connector 6 radio frequency cables
7 wave guide box 8 block pieces
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.Should be understood that, embodiment described herein, only for instruction and explanation of the present invention, is not limited to the present invention.
Shown in Fig. 2 b, one aspect of the present invention provides a kind of antenna for microwave heating equipment, this antenna comprises mast 1, and this mast 1 has the feed side 11 of the microwave source for connecting microwave heating equipment and the transmitting terminal 12 for the heating chamber launched microwave to described microwave heating equipment.Thus upon connection, the microwave signal that microwave source produces from feed side 11 feed antenna, and can be launched, with the food etc. in heating chamber to heating chamber by transmitting terminal 12 after guided wave being converted to free space wave.
In antenna provided by the invention, mast 1 extends out extension along from feed side 11 to the direction of transmitting terminal 12, with the face area making the face area of described transmitting terminal 12 be greater than described feed side 11.By this structure, after microwave is fed into antenna from the feed side 11 of mast 1, the structure extended through diffusion is transmitted to transmitting terminal 12, makes the microwave exported to be emitted in heating chamber evenly, efficiently.Antenna directivity provided by the invention is good, and efficiency of transmission is high, be convenient to in such as semiconductor microwave oven to reduce energy ezpenditure, and be convenient to simplified structure, improve fail safe.
Antenna of the present invention can be formed as various structures form.Such as, evenly can extend out on the whole development length of mast 1, to have frustum or truncated cone-shaped structure, or on the part development length of mast 1, (as mid portion) extends out, to have flared structure etc.The cross section that " extending out extension " described herein is often referred to mast 1 increases gradually along center of extension line, and described center of extension line is a continuous print straight line or curve.
In illustrated preferred embodiment, mast 1 has at the feed-in section 13 near side, feed side 11, the transmitter section 14 near transmitting terminal 12 side and changeover portion 15 between feed-in section 13 and transmitter section 14, wherein, the cross-sectional area size of described feed-in section 13 and described transmitter section 14 is constant separately, namely this feed-in section 13 and transmitter section 14 have the constant cross section perpendicular to its bearing of trend respectively, as feed-in section 13 and transmitter section 14 can be set to cylindrical structural as described below respectively.By this set, the microwave that microwave source produces can concentrate feed antenna by thinner feed-in section 13, and at changeover portion 15 diffusive transport gradually, and then stablize at thicker transmitter section 14, launch to heating chamber equably, be convenient to improve microwave heating effects.
Further, feed-in section 13 and described transmitter section 14 have cylindrical structural respectively, and described changeover portion 15 has truncated cone structure, thus adapt to the transmission of microwave, to reduce power loss.Alternatively, feed-in section 13 and transmitter section 14 can have prism structure respectively, and/or changeover portion 15 can have frustum of a pyramid shape structure.
Preferably, in order to reduce the power match between microwave leaky wave on the transmit path and each several part, antenna can also comprise ground plate 2, this ground plate 2 and mast 1 setting insulated from each other, such as, with insulating material, ground plate 2 and mast 1 can be separated, and ground plate 2 be formed with the endoporus that passes for microwave transmission path and with heating chamber altogether.Herein microwave transmission path mainly refer to from the power take-off of microwave source to mast 1 as the part between changeover portion 15, namely may be feed-in section 13 or the inner wire etc. of radio frequency connector 5 in further preferred implementation subsequently of mast 1 through the structure of described endoporus.
Namely the minor variations of antenna may cause the larger change of microwave heating performance, for this reason, needs to carry out minute design.In addition, the performance of microwave heating is also subject to the impact of the factors such as the size of heat space (cooking chamber as microwave oven).In designing antenna dimensional parameters process, need to consider above-mentioned many factors, obtain suitable antenna structure parameter through the calculating of complexity and long-term debugging.In the present invention, the impedance of antenna is by normal impedance (50 Ω ~ 75 Ω) design.And one of the present invention comparatively preferred embodiment in, mast 1 meets following at least one: the diameter of feed-in section 13 is 2mm ~ 4mm, and length is 8mm ~ 14mm; The diameter of transmitter section 14 is 4mm ~ 7mm, and length is 5mm ~ 9mm; The tapering of changeover portion 15 is 1:7 ~ 1:3.The antenna 3 with above-mentioned key parameter can play the efficiency of transmission significantly improved in semiconductor microwave oven, to reduce power loss, cost-saving.In addition, as can be seen from embodiment subsequently, antenna provided by the invention, owing to having above-mentioned dimensional parameters, can obtain the power stage of stability and high efficiency in semiconductor microwave oven, thus significantly can improve the overall performance of microwave oven.
For understanding the advantage of the preferred embodiment for the present invention intuitively, analyze the stationary wave characteristic of a kind of preferred structure of the present invention referring now to accompanying drawing 8.
As shown in Figure 8, the working frequency range of antenna of the present invention is 2.4GHz ~ 2.5GHz, and weighs efficiency of transmission by standing-wave ratio.Wherein, when standing-wave ratio is 1 ~ 1.04, microwave transmission efficiency can be regarded as 100%, and this is difficult to reach.Mast 1 meets: the diameter of feed-in section 13 is 3mm, and length is 11.4mm; The diameter of transmitter section 14 is 5.4mm, and length is 7mm; The tapering of changeover portion 15 is 1:5.As can be seen from the figure, in above-mentioned working frequency range, the standing-wave ratio of antenna of the present invention is between 1.4 ~ 1.51, and efficiency of transmission is about 96% ~ 97%, thus can heat food etc. efficiently.
Shown in Fig. 3 a to Fig. 7, another aspect of the present invention provides a kind of microwave oven with above-mentioned antenna, this microwave oven is semiconductor microwave oven and comprises the semiconductor microwave generator 3 as microwave source and the cooking chamber 4 as heating chamber further, the feed side 11 of mast 1 is connected to the power take-off of semiconductor microwave generator 3, can transmit microwave from transmitting terminal 12 in cooking chamber 4.For those skilled in the art well known, the microwave that microwave source (as magnetron, semiconductor microwave generator 3 etc.) produces needs to be converted to free space wave through guided wave and can be used to heating operation.Such as, output aerial head in conventional art on magnetron (it should be noted that, this output aerial head can connect antenna usually, but its effect is only change polarization mode and microwave directivity) and the present invention in antenna 3 be parts for above-mentioned translation function.
Thus, antenna of the present invention can the microwave that produces of conversion semiconductor microwave generator 3 transmitting it in cooking chamber 4 with heat food etc.Can find out, in the present invention, microwave oven utilizes semiconductor microwave generator 3 to produce microwave as microwave source, has higher fail safe; And transmit microwave by the mast 1 extending out extension to cooking chamber 4, thus microwave transmission efficiency can be improved, to reduce the energy needed for heat food.In the present invention, the antenna of use even without the need to or reduce the setting of relevant matches structure, can only be exported by single power supply, microwave source or antenna and conversion microwave, structure is simple.Can find out in optimal way subsequently, although in order to ensure that sufficient energy or other causes can provide some dependency structures further, microwave oven of the present invention on the whole comparatively simple in the structure of microwave source part, feed-in part, cost is lower.
In the present invention, mast 1 can by metal and low-loss material make, as gold-plated in copper matrix etc.; Ground plate 2 can by metal and the good material of electric conductivity make, as zinc-plated in copper or aluminium matter matrix etc.
In heating process, need microwave to constrain in cooking chamber 4, the wall of cooking chamber 4 is made up of metal material usually, therefore, although set up other materials as required sometimes, usually make ground plate 2 and the wall compact siro spinning technology cooking chamber 4, thus make the two keep altogether.
In order to understand above-mentioned and other feature better in detail, the multiple concrete structure of microwave oven of the present invention is described in detail below with reference to multiple preferred implementation of the present invention.Wherein, for consideration that is succinct and length, for the part of same structure, its repeat specification will be omitted.
With reference to shown in Fig. 4, according to the microwave oven of the first preferred implementation of the present invention, there is semiconductor microwave generator 3, cooking chamber 4 and comprise the antenna of mast 1 and ground plate 2.The side of ground plate 2 directly contacts with the outside wall surface of cooking chamber 4, although not shown, also ground plate 2 can be arranged in cooking chamber 4 to make its side directly contact with the internal face of cooking chamber 4.Mast 1 main part stretches in cooking chamber 4, and the internal face of this cooking chamber 4 is provided with the block piece 8 for the protection of mast 1.Typically, this block piece 8 can be penetrated by microwave and the material not absorbing microwave is made, and as mica sheet, plastics, glass etc., to avoid the contaminants adhere caused due to food splashing etc. in the first-class problem of mast 1, affects microwave transmission efficiency.
Wherein, ground plate 2 directly or indirectly can be connected to shell or the pedestal (specific constructive form according to semiconductor microwave generator 3) of semiconductor microwave generator 3.Such as, shown in composition graphs 3a, paired radio frequency connector 5 is provided with between ground plate 2 and semiconductor microwave generator 3, and ground plate 2 is connected to shell or the pedestal of semiconductor microwave generator 3 by the outer conductor of this radio frequency connector 5, the feed side 11 of mast 1 is connected to the power take-off of semiconductor microwave generator 3 by the inner wire of this radio frequency connector 5.Be understandable that, herein and the radio frequency connector 5 of the following stated, what comprise that pairing uses connects a pair of semiconductor microwave generator 3 and antenna respectively, and when wherein one is male, another one is female.The flexibility can improve design by radio frequency connector 5, manufacturing and debug, is convenient to field-strip in case of need.
As another kind of Alternate embodiments, antenna also directly can be connected with semiconductor microwave generator 3, as shown in Figure 3 b.In this case, housing or the pedestal of ground plate 2 and semiconductor microwave generator 3 can directly contact, thus simultaneously with semiconductor microwave generator 3 with cook chamber 4 altogether simultaneously.Correspondingly, now the feed side 11 of mast 1 is directly connected with the power take-off of semiconductor microwave generator 3.By this connected mode, the feed-in part of microwave oven can be made to have succinct structure, reduce costs and power loss.But the indirect type of attachment compared above by radio frequency connector 5, its flexibility is relatively poor.
With reference to shown in Fig. 5, according to the microwave oven of the second preferred implementation of the present invention, there is the structure substantially identical with the first preferred implementation above-mentioned.Its difference is, has additional radio frequency cable 6.The advantage of this setup is, is convenient to the structural configuration when semiconductor microwave generator 3 can not closely directly be connected with antenna, has better flexibility to make the overall construction design of microwave oven.
Above-mentioned two kinds of preferred implementations mainly illustrate the type of attachment between antenna and semiconductor microwave generator 3, and describe ground plate 2 and the direct type of attachment of cooking chamber 4.Below with reference to other two kinds of preferred implementations, the indirect type of attachment between this antenna and cooking chamber 4 is described.On this basis, can optionally the feature of different execution mode be combined mutually, to form more embodiment.Such as, it is medium that the radio frequency cable 6 in above-mentioned the second preferred implementation also may be used for other preferred implementations following.
With reference to shown in Fig. 6, according to the microwave oven of the third preferred implementation of the present invention, there is the structure substantially identical with the first preferred implementation above-mentioned.Its difference is, has additional wave guide box 7, and mast 1 main part stretches in this wave guide box 7.Normally, waveguide mouth can be set on the wall of cooking chamber 4, wave guide box 7 be fastened on from outside waveguide mouth and be connected with the outer wall of cooking chamber 4, simultaneously, ground plate 2 fits in the side away from cooking chamber 4 of wave guide box 7, thus passes through this wave guide box 7 and cook chamber 4 altogether.
With reference to shown in Fig. 7, according to the microwave oven of the present invention's the 4th kind of preferred implementation, there is the structure substantially identical with the third preferred implementation above-mentioned.Its difference is, ground plate 2 has the kink 21 of outer wall for engaging cooking chamber 4, thus ground plate 2 directly contacts with the outer wall cooking chamber 4 and altogether.
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 execution mode; 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 the concrete technical characteristic described in above-mentioned embodiment, 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 compound mode.
In addition, also can carry out combination in any between various different execution mode 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 (13)
1. the antenna for microwave heating equipment, it is characterized in that, described antenna comprises mast (1), this mast (1) has the feed side (11) of the microwave source for connecting described microwave heating equipment and the transmitting terminal (12) for the heating chamber launched microwave to described microwave heating equipment, and this mast (1) is along extending out extension from described feed side (11) to the direction of described transmitting terminal (12), with the face area making the face area of described transmitting terminal (12) be greater than described feed side (11).
2. antenna according to claim 1, it is characterized in that, described mast (1) have be positioned near described feed side (11) side feed-in section (13), near described transmitting terminal (12) side transmitter section (14) and be positioned at changeover portion (15) between described feed-in section (13) and this transmitter section (14), wherein, the cross-sectional area size of described feed-in section (13) and described transmitter section (14) is constant separately.
3. antenna according to claim 2, is characterized in that, described feed-in section (13) and described transmitter section (14) have cylindrical structural respectively, and described changeover portion (15) has truncated cone structure.
4. antenna according to claim 3, is characterized in that, described mast (1) meets following at least one:
The diameter of described feed-in section (13) is 2mm ~ 4mm, and length is 8mm ~ 14mm;
The diameter of described transmitter section (14) is 4mm ~ 7mm, and length is 5mm ~ 9mm;
The tapering of described changeover portion (15) is 1:7 ~ 1:3.
5. antenna as claimed in any of claims 1 to 4, it is characterized in that, described antenna also comprises the ground plate (2) with described mast (1) setting insulated from each other, this ground plate (2) be formed with the endoporus that passes for microwave transmission path and with described heating chamber altogether.
6. a microwave oven, it is characterized in that, antenna in the with good grounds Claims 1-4 of this microwave stove described in any one, the semiconductor microwave generator (3) as described microwave source and the cooking chamber (4) as described heating chamber, the described feed side (11) of described mast (1) is connected to the power take-off of described semiconductor microwave generator (3), interiorly from described transmitting terminal (12) to described cooking chamber (4) can transmit microwave.
7. microwave oven according to claim 6, it is characterized in that, described antenna also comprises the ground plate (2) with described mast (1) setting insulated from each other, this ground plate (2) be formed with the endoporus that passes for microwave transmission path and with described cooking chamber (4) altogether.
8. microwave oven according to claim 7, is characterized in that, described ground plate (2) is connected to shell or the pedestal of described semiconductor microwave generator (3).
9. microwave oven according to claim 8, it is characterized in that, described ground plate (2) is connected to shell or the pedestal of described semiconductor microwave generator (3) by the outer conductor of the radio frequency connector (5) arranged in pairs, and the described feed side (11) of described mast (1) is connected to the power take-off of described semiconductor microwave generator (3) by the inner wire of described radio frequency connector (5).
10. microwave oven according to claim 7, it is characterized in that, described antenna is connected to described semiconductor microwave generator (3) by the radio frequency connector (5) arranged in pairs, wherein, radio frequency cable (6) is connected with between the described radio frequency connector (5) arranged in pairs.
11. microwave ovens according to claim 7, it is characterized in that, described microwave oven also comprises wave guide box (7), this wave guide box (7) is connected in the outside wall surface of described cooking chamber (4), described ground plate (2) is fitted in the side away from described cooking chamber (4) of this wave guide box (7), and the described transmitting terminal (12) of described mast (1) is stretched in this wave guide box (7).
12. microwave ovens according to claim 11, is characterized in that, described ground plate (2) has the kink (21) of the outside wall surface for engaging described cooking chamber (4).
13. microwave ovens according to claim 6; it is characterized in that; the described transmitting terminal (12) of described mast (1) stretches in described cooking chamber (4), and the internal face of this cooking chamber (4) is provided with the block piece (8) for the protection of described mast (1).
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| CN201610070493.5A CN105491702B (en) | 2016-02-01 | 2016-02-01 | Antenna and micro-wave oven for microwave heating equipment |
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| CN201610070493.5A CN105491702B (en) | 2016-02-01 | 2016-02-01 | Antenna and micro-wave oven for microwave heating equipment |
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| CN106231712A (en) * | 2016-09-19 | 2016-12-14 | 广东美的厨房电器制造有限公司 | The antenna module of microwave oven and microwave oven |
| CN107917614A (en) * | 2017-12-25 | 2018-04-17 | 湖南长仪微波科技有限公司 | A kind of microwave pressure sintering furnace |
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| CN105491702B (en) | 2019-07-02 |
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