CN117425240A - Microwave assembly and cooking utensil - Google Patents

Microwave assembly and cooking utensil Download PDF

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Publication number
CN117425240A
CN117425240A CN202311297601.9A CN202311297601A CN117425240A CN 117425240 A CN117425240 A CN 117425240A CN 202311297601 A CN202311297601 A CN 202311297601A CN 117425240 A CN117425240 A CN 117425240A
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CN
China
Prior art keywords
cavity
region
microwave
magnetron
equal
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN202311297601.9A
Other languages
Chinese (zh)
Inventor
张子文
卢阳佳
李平
侯艺凡
温戴新
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Xidian University
Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Original Assignee
Xidian University
Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Xidian University, Guangdong Midea Kitchen Appliances Manufacturing Co Ltd filed Critical Xidian University
Priority to CN202311297601.9A priority Critical patent/CN117425240A/en
Publication of CN117425240A publication Critical patent/CN117425240A/en
Pending legal-status Critical Current

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/02—Stoves or ranges heated by electric energy using microwaves
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C7/00—Stoves or ranges heated by electric energy
    • F24C7/06—Arrangement or mounting of electric heating elements
    • 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
    • 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
    • H05B6/70—Feed lines
    • H05B6/707—Feed lines using waveguides
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/04—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels
    • A47J2027/043—Cooking-vessels for cooking food in steam; Devices for extracting fruit juice by means of steam ; Vacuum cooking vessels for cooking food in steam

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  • Engineering & Computer Science (AREA)
  • Food Science & Technology (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Manufacturing & Machinery (AREA)
  • Constitution Of High-Frequency Heating (AREA)

Abstract

The invention provides a microwave assembly and a cooking utensil, wherein the microwave assembly comprises: a magnetron for emitting microwaves; a waveguide tube communicated with the magnetron, the waveguide tube comprising a microwave outlet; the coupling structure covers the microwave outlet, a plurality of gaps are formed in the coupling structure, and microwaves emitted by the magnetron can pass through the gaps; the radiation size of the slit is greater than or equal to 0.35λ 1 And less than or equal to 0.65lambda 1 Wherein, on the contour line of the gap, the maximum value of the connecting line between any two points is the spokeJet size lambda 1 The air wavelength of the microwaves emitted by the magnetron.

Description

Microwave assembly and cooking utensil
Technical Field
The invention relates to the technical field of household appliances, in particular to a microwave assembly and a cooking appliance.
Background
At present, a microwave assembly feeds microwaves into a cooking cavity of a cooking appliance to cook food, one of the related technologies is to enable a turntable for placing the food to rotate to uniformly heat the food, the other one is to increase a rotating antenna near a coupling window of the microwave assembly to disturb the microwaves to uniformly heat the food, and the two schemes are required to be provided with a rotating driving structure to drive the turntable to rotate or drive a stirring antenna to rotate, and the driving structure belongs to vulnerable parts, so that the overall reliability of a product is lowered. Meanwhile, the disturbance of the two structures to microwaves is single, so that primary energy entering the cooking cavity is concentrated too much, and the heating uniformity is not improved.
Disclosure of Invention
The present invention aims to solve at least one of the technical problems existing in the prior art or related art.
To this end, a first aspect of the invention provides a microwave assembly.
The second aspect of the invention also provides a cooking appliance.
In view of this, a first aspect of the present invention proposes a microwave assembly comprising: a magnetron for emitting microwaves; a waveguide tube communicated with the magnetron, the waveguide tube comprising a microwave outlet; the coupling structure covers the microwave outlet, a plurality of gaps are formed in the coupling structure, and microwaves emitted by the magnetron can pass through the gaps; the radiation size of the slit is greater than or equal to 0.35λ 1 And less than or equal to 0.65lambda 1 WhereinOn the contour line of the slit, the maximum value of the connecting line between any two points is the radiation size lambda 1 The air wavelength of the microwaves emitted by the magnetron.
The microwave assembly provided by the invention comprises a magnetron, a waveguide tube and a coupling structure. The magnetron is communicated with the waveguide tube, microwaves can be fed into the waveguide tube through the magnetron, the coupling structure covers the microwave outlet of the waveguide tube, a plurality of gaps are formed in the coupling structure, microwaves emitted by the magnetron can pass through the gaps, and the gaps can interfere the microwaves, so that the purpose of uniform heating is achieved. Wherein the radiation size of the slit is greater than or equal to 0.35λ 1 And less than or equal to 0.65lambda 1 The size range enables microwaves radiated by the magnetron to smoothly pass through the coupling structure, energy is radiated into the cooking cavity to be heated in a multipath mode, and the uniform heating effect of the cooking cavity is improved. The utility model provides a microwave subassembly, through set up the coupling structure in microwave exit, a plurality of gaps on the coupling structure interfere the microwave, realized the distribution to microwave energy, the microwave that makes the microwave subassembly send is more even, and then promoted the homogeneity of heating, and, the technical scheme that this application put forward need not set up drive structure and antenna structure and interfere the microwave, and then reduced the occupation to cooking utensil's space, the usage space of cooking chamber has been increased, manufacturing cost has been reduced, simultaneously, the setting reliability in a plurality of gaps is stronger than drive structure, and then promoted the stability of culinary art and the reliability of microwave subassembly even heating.
The microwave assembly provided by the invention can also have the following additional technical characteristics:
in some possible designs, the shape of the plurality of slits may be the same or different.
In the design, the shapes of the plurality of gaps can be the same, so that the manufacturing is convenient, and the processing cost is reduced; the shapes of the plurality of gaps can also be different so as to be matched with the microwave energy at different positions in the second cavity to carry out corresponding setting, so that the shapes of the gaps are matched with the microwave energy, and microwaves can be emitted uniformly.
In some possible designs, the shape of the slit includes at least one of a U-shape, a C-shape, a T-shape, an L-shape, an X-shape, or an I-shape.
In this design, the shape of the slit may include at least one of a U-shape, a C-shape, a T-shape, an L-shape, an X-shape, and an i-shape, and the slit may be cut by a current at the microwave outlet.
In some possible designs, the contour line of the slit includes a plurality of sides, and a rounded corner is provided between two adjacent sides in a case that an included angle between the two adjacent sides is 70 ° or less.
In this design, the contour line of gap includes a plurality of limits, carries out the fillet processing between two adjacent limits under the circumstances that the contained angle between two adjacent limits is less than or equal to 70, avoids the contour line of gap to appear sharp form, and then avoids the emergence of the phenomenon of striking sparks in gap department because of the field intensity near the coupling structure is too high.
In some possible designs, the width of the slit is 6mm or more.
In this design, too small a gap width can cause excessive energy per unit size through the gap, thereby easily causing a fire to occur, severely affecting the useful life and output efficiency of the microwave assembly. Therefore, the width of the gap is set to be more than or equal to 6mm, and the service life and the output efficiency of the microwave assembly are ensured.
In some possible designs, the radiation dimension of the slit is greater than or equal to 0.4λ 1 And less than or equal to 0.6λ 1 . In the design, the radiation size of the gap is too large or too small, more situations can occur that the electromagnetic wave with the target frequency cannot be fed out, the passing effect on the microwaves with the specified frequency range is affected, and therefore, the radiation size of the gap is set to be 0.4lambda 1 Up to 0.6λ 1 Can ensure the feed-out effect of microwaves,
so that the microwave emitted by the magnetron can smoothly pass through the gap and can radiate energy into the cooking cavity in multiple ways. In some possible designs, the waveguide includes: the first cavity is communicated with the magnetron; the second cavity is arranged at one end of the first cavity along the first direction and is communicated with the first cavity; along the second direction, at least one of the two ends of the second cavity protrudes out of the first cavity, the wall surface of the second cavity along the third direction is provided with a microwave outlet, and the first direction, the second direction and the third direction are different.
In this design, the waveguide includes a first cavity and a second cavity. The first cavity is communicated with the magnetron, the second cavity is communicated with the first cavity, a microwave outlet is formed in the wall surface of the second cavity along the third direction, microwaves emitted by the magnetron enter the second cavity from the first cavity, and then enter the cooking cavity from the microwave outlet of the second cavity after passing through the gap, so that a microwave heating function is realized. At least one of the two ends of the second cavity along the second direction protrudes out of the first cavity, so that the second cavity is longer than the first cavity along the second direction, the range of microwave allocation is further increased, and the microwave can be uniformly heated under the action of the gap.
In some possible designs, the length of the first cavity is greater than λ in the first direction 2 And/4, the length of the second cavity is greater than or equal to 0.4 x (nλ 2 ) And less than or equal to 0.6× (nλ) 2 ) The method comprises the steps of carrying out a first treatment on the surface of the Along the second direction, the length of the first cavity is greater than or equal to 0.45lambda 2 And less than or equal to 0.55λ 2 The length of the second cavity is greater than or equal to lambda 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein lambda is 2 The wave guide wavelength of the microwave emitted by the magnetron is n which is a positive integer.
In the design, the length of the first cavity is greater than 1/4 of the waveguide wavelength of the microwave emitted by the magnetron along the first direction, and the length of the first cavity is greater than or equal to 0.45λ along the second direction 2 And less than or equal to 0.55λ 2 Ensuring smooth transmission of electromagnetic wave and reducing loss of electromagnetic wave. The length of the second cavity along the first direction is more than or equal to 0.4× (nλ 2 ) And less than or equal to 0.6× (nλ) 2 ) The length of the second cavity along the second direction is more than or equal to lambda 2 The microwave energy distribution device can ensure that microwaves are smoothly transmitted, reduce energy loss, form a plurality of resonance energy peaks in the second cavity, improve the range of microwave energy distribution, and further improve heating uniformity.
In some possible designs, the magnetron includes an antenna cap and the second cavity includes a first A region and a second region; along a first direction, the first area is arranged close to the first cavity, and the second area is arranged far away from the first cavity; and the first region and the second region are close to the antenna cap along the second direction; wherein the first region and the second region are each 0.4λ or more in side length 1 And less than or equal to 0.6λ 1 The first region corresponds to at least a portion of the at least one slot and the second region corresponds to at least a portion of the at least one slot.
In this design, the magnetron includes an antenna cap, the second cavity includes a first region and a second region, the first region is adjacent to the first cavity in a first direction, the second region is distant from the first cavity in the first direction, and the first region and the second region are both adjacent to the antenna cap in a second direction. The coupling structure parts corresponding to the first area and the second area are at least provided with at least one part of at least one gap, and the first area and the second area are square, and the side lengths of the first area and the second area are more than or equal to 0.4lambda 1 And less than or equal to 06 lambda 1 And then the microwaves near the magnetron are regulated and controlled, and the microwave energy of the cooking cavity far away from the coupling structure is supplemented, so that the microwaves are more uniform in the cooking cavity, and the heating uniformity is improved.
In some possible designs, a side of the first area facing the first cavity is attached to a wall surface of the second cavity, which is close to the first cavity, and a side of the first area facing the second area is overlapped with the center of the antenna cap along the first direction; one side of the second area far away from the first cavity is attached to the wall surface of the second cavity far away from the first cavity, and one side of the second area facing the first area is overlapped with the center of the antenna cap along the first direction.
In this design, the specific distribution of the first region and the second region may be: one side of the first area facing the first cavity is overlapped with the wall surface of the second cavity, which is close to the first cavity, along the first direction, one side of the second area, which is far away from the first cavity, is overlapped with the wall surface of the second cavity, which is far away from the first cavity, along the first direction, and one side of the second area, which is close to the antenna cap, is overlapped with the connecting line of the center of the antenna cap along the first direction. That is, the first area and the second area are respectively attached to the second cavity along the first direction, and one sides of the first area and the second area, which are close to the antenna cap, are respectively overlapped with the connecting line of the center of the antenna cap along the first direction, so that the first area and the second area can regulate and control microwave energy near the antenna cap, and heating uniformity is improved.
In some possible designs, the area of the slit in the first region is 70% or more of the area of the slit in the plane in which the first and second directions lie, and the area of the slit in the second region is 70% or more of the area of the slit.
In the design, the first area and the second area respectively correspond to 70% of at least one slot, and when the radiation size optimization result of the slot exceeds the range, microwaves near the antenna cap can be regulated and controlled.
In some possible designs, the second cavity includes a third region and a fourth region distributed along the first direction, the third region being located on a side of the fourth region adjacent to the first cavity; the third region corresponds to at least a portion of at least two slits.
In the design, the second cavity comprises a third area and a fourth area which are distributed along the first direction, the third area is positioned at one side of the fourth area, which is close to the first cavity, and at least two gaps are arranged at the part, corresponding to the third area, of the coupling structure so as to regulate and control the microwave energy of the part, which is close to the magnetron, and supplement the microwave energy of the whole cooking cavity, which is far away from the coupling structure, and improve the plane heating uniformity.
In some possible designs, the third region and the fourth region each have a volume of half the volume of the second cavity.
In the design, the volumes of the third area and the fourth area are half of that of the second cavity, namely, the second cavity is divided into an upper part and a lower part, and at least two gaps are arranged on the coupling structure corresponding to the upper part of the second cavity so as to realize the purpose of uniform heating.
In some possible designs, the area of the slit in the third region is 70% or more of the slit area.
In this design, at least 70% of the slits corresponding to the third region fall within the third region to ensure the regulatory capability of microwave energy and thus the reliability of uniform heating.
According to a second aspect of the present invention, there is also provided a cooking appliance comprising: a microwave assembly as claimed in any one of the preceding claims.
The cooking appliance provided by the second aspect of the invention comprises the microwave assembly provided by any one of the technical schemes, so that the cooking appliance has all the beneficial effects of the microwave assembly.
In some possible designs, the cooking appliance further comprises: the cooking cavity is provided with an opening, the coupling structure covers the opening, and microwaves emitted by the magnetron enter the cooking cavity through the opening after passing through the gap.
In this design, the cooking appliance includes a cooking cavity, and the coupling structure covers an opening of the cooking cavity to feed microwave energy into the cooking cavity through the opening, thereby realizing a heating function. The microwaves emitted by the magnetron enter the cooking cavity after passing through the gaps, so that the microwave distribution in the cooking cavity is more uniform, the microwave heating uniformity is improved, the driving structure and the antenna structure are not required to be additionally arranged, the occupation of the space of the cooking cavity is saved, and the manufacturing cost is reduced.
In some possible designs, the cooking appliance further comprises: a partition plate; the cooking cavity comprises a first wall surface and a second wall surface which are oppositely arranged, and side walls surrounding the first wall surface and the second wall surface; the partition plate is arranged on a first wall surface of the cooking cavity, and the opening is arranged on the side wall of the cooking cavity or on a second wall surface of the cooking cavity.
In this design, the cooking appliance further comprises a partition, which can be used for placing food. The first wall surface and the second wall surface which are oppositely arranged and the side wall which is arranged between the first wall surface and the second wall surface are surrounded to form a cooking cavity, the partition board is arranged on the first wall surface, the opening is arranged on the side wall of the cooking cavity or the second wall surface, namely, the microwave component is arranged on the side wall of the cooking cavity or the second wall surface, the space below the first wall surface of the cooking cavity is not occupied, the height of the cooking cavity is further reduced, and the manufacturing cost is reduced.
In some possible designs, the cooking appliance includes any one of a microwave oven, a micro-steaming all-in-one machine.
In this design, the cooking appliance may be a microwave oven, a micro-steaming all-in-one machine.
Additional aspects and advantages of the invention will be set forth in part in the description which follows, or may be learned by practice of the invention.
Drawings
The foregoing and/or additional aspects and advantages of the invention will become apparent and may be better understood from the following description of embodiments taken in conjunction with the accompanying drawings in which:
fig. 1 illustrates one of schematic structural views of a cooking appliance according to an embodiment of the present invention;
FIG. 2 shows a second schematic structural view of a cooking appliance according to an embodiment of the present invention;
FIG. 3 shows one of the formant electric field vector simulation graphs of a microwave assembly in accordance with one embodiment of the present invention;
FIG. 4 shows a second simulation of the resonant peak electric field vector of a microwave assembly in accordance with one embodiment of the invention;
FIG. 5 shows a spin-on schematic of the resonant peak magnetic field of a microwave assembly in accordance with one embodiment of the invention;
FIG. 6 shows one of the structural schematic diagrams of the microwave assembly of one embodiment of the invention;
FIG. 7 shows a second schematic structural view of a microwave assembly according to an embodiment of the invention;
FIG. 8 shows a third schematic structural view of a microwave assembly according to an embodiment of the invention;
FIG. 9 shows a fourth schematic structural view of a microwave assembly according to an embodiment of the invention;
FIG. 10 shows a fifth schematic structural view of a microwave assembly according to an embodiment of the invention;
FIG. 11 shows a sixth schematic structural view of a microwave assembly according to an embodiment of the invention;
FIG. 12 shows a seventh schematic structural view of a microwave assembly in accordance with one embodiment of the invention;
FIG. 13 shows a schematic structural view of a microwave assembly according to an embodiment of the invention;
FIG. 14 shows a ninth schematic structural view of a microwave assembly according to an embodiment of the invention;
FIG. 15 shows a schematic view of a microwave assembly according to one embodiment of the invention;
FIG. 16 shows eleven structural schematic diagrams of a microwave assembly according to an embodiment of the invention;
FIG. 17 shows a schematic view of a microwave assembly in accordance with one embodiment of the invention;
FIG. 18 shows a thirteenth schematic view of the structure of a microwave assembly according to an embodiment of the invention;
FIG. 19 shows a fourteen schematic structural views of a microwave assembly according to one embodiment of the invention;
FIG. 20 is a graph showing simulation and measured |S11| parameter results for a microwave assembly in accordance with one embodiment of the present invention;
FIG. 21 shows a temperature simulation effect diagram of a microwave assembly mounted to a side of a cooking cavity in accordance with one embodiment of the present invention;
FIG. 22 shows an infrared imaging diagram of a coupling structure of one embodiment of the present invention in an operating state with a load of 16 Gong Geshui heated;
fig. 23 shows an infrared imaging diagram of a load of heating 16 Gong Geshui in an operating state of a related art cooking appliance.
The correspondence between the reference numerals and the component names in fig. 1 to 19 is:
1 magnetron, 10 antenna cap, 2 waveguide, 20 microwave outlet, 22 first cavity, 24 second cavity, 240 first area, 241 second area, 242 third area, 243 fourth area, 3 coupling structure, 30 slot, 4 cooking cavity, 40 opening, 42 first wall, 44 second wall, 46 side wall, 5 partition.
Detailed Description
In order that the above-recited objects, features and advantages of the present invention will be more clearly understood, a more particular description of the invention will be rendered by reference to the appended drawings and appended detailed description. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments may be combined with each other.
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, however, the present invention may be practiced in other ways than those described herein, and therefore the scope of the present invention is not limited to the specific embodiments disclosed below.
A microwave assembly and a cooking appliance according to some embodiments of the present invention are described below with reference to fig. 1 to 23.
As shown in fig. 1, 2 and 6, according to an embodiment of the present invention, the present invention proposes a microwave assembly comprising: a magnetron 1, a waveguide 2 and a coupling structure 3.
Specifically, the magnetron 1 is used to emit microwaves; a waveguide 2 is communicated with the magnetron 1, and the waveguide 2 comprises a microwave outlet 20; the coupling structure 3 covers the microwave outlet 20, a plurality of gaps 30 are formed in the coupling structure 3, and microwaves emitted by the magnetron 1 can pass through the gaps 30; the radiation dimension L1 of the slit 30 is 0.35λ or more 1 And less than or equal to 0.65lambda 1 。
Wherein the maximum value of the connecting line between any two points on the contour line of the slit 30 is the radiation dimension L1, lambda 1 The air wavelength of the microwaves emitted by the magnetron 1.
The microwave assembly provided by the invention comprises a magnetron 1, a waveguide 2 and a coupling structure 3. The magnetron 1 is communicated with the waveguide tube 2, microwaves can be fed into the waveguide tube 2 by the magnetron 1, the coupling structure 3 covers the microwave outlet 20 of the waveguide tube 2, a plurality of gaps 30 are formed in the coupling structure 3, microwaves emitted by the magnetron 1 can pass through the gaps 30, and the gaps 30 can interfere the microwaves, so that the purpose of uniform heating is achieved. Wherein the radiation dimension L1 of the slit 30 is greater than or equal to 0.35λ 1 And less than or equal to 0.65lambda 1 That is, the radiation dimension L1 of the slit 30 is (0.5λ 1 )±(0.3λ 1 ) The radiation size of the slit 30 is made to be about half wavelength, and the size range enables the microwave radiated from the magnetron 1 to pass through the coupling structure 3 smoothly, so that energy is radiated into the cooking cavity 4 to be heated in multiple ways, and the uniform heating effect of the cooking cavity 4 is improved. The microwave component provided by the application is prepared by microwave The mouth 20 department sets up coupling structure 3, interfere the microwave through a plurality of gaps 30 on the coupling structure 3, realized the distribution to microwave energy, the microwave that makes the microwave subassembly send is more even, and then promoted the homogeneity of heating, and, the embodiment that this application put forward does not need to set up drive structure and antenna structure and interferes the microwave, and then reduced the occupation to cooking utensil's space, increased cooking cavity 4's usage space, reduced manufacturing cost, simultaneously, a plurality of gaps 30 set up the reliability and be stronger than drive structure, and then promoted the stability of culinary art and the reliability of microwave subassembly even heating.
It will be appreciated that the present application provides for a plurality of slits 30 in the coupling structure 3 to provide for a multi-slit quasi-in-phase distribution of the primary energy field entering the cooking cavity 4, thereby allowing for a superposition of the energy distribution caused by the inherent resonant modes within the cooking cavity 4 and the distributed primary energy field for a uniform heating. It should be noted that, the microwave enters the cooking cavity 4 to be reflected multiple times, and finally, an inherent resonant mode is formed.
Specifically, the microwaves emitted by the magnetron 1 are dispersed under the interference of the slits 30 when passing through the coupling structure 3, that is, the plurality of slits disperse one larger electromagnetic wave into a plurality of smaller electromagnetic waves, so that the energy of the microwaves is dispersed along the plurality of slits 30, and a relatively uniform thermal field is formed in the cooking cavity, so that the hot spots in the cooking cavity 4 are distributed more uniformly, and the purpose of uniform heating is achieved.
Lambda is the sum of the values of lambda 1 The air wavelength of the microwaves emitted from the magnetron 1, that is, the wavelength of the microwaves emitted from the magnetron 1 when they propagate in the air.
Alternatively, the radiation dimension L1 of the slit 30 is specifically: 0.4λ 1 、0.45λ 1 、0.5λ 1 、0.55λ 1 、0.6λ 1 、0.65λ 1 Any number of (a) is provided.
As shown in fig. 7, 8, 9, 10, 11, 12, 13, 14, and 15, the shape of the plurality of slits 30 may alternatively be the same or different in accordance with some embodiments of the present invention.
In this embodiment, the shape of the plurality of slits 30 may be the same to facilitate manufacturing and reduce manufacturing costs; the shapes of the plurality of slits 30 may also be different to match the microwave energy at different positions in the second cavity 24 to perform corresponding setting, so that the shape of the slits 30 is adapted to the microwave energy, and thus the microwaves can be emitted uniformly.
As shown in fig. 7, 8, 9, 10, 11, 12, 13, 14, and 15, the shape of the slit 30 may optionally include at least one of a U-shape, a C-shape, a T-shape, an L-shape, an X-shape, or an i-shape, according to some embodiments of the invention.
In this embodiment, the shape of the slit 30 includes at least one of a U-shape, a C-shape, a T-shape, an L-shape, an X-shape, or an i-shape, and the shape of the slit may be any shape that can cut the current at the microwave outlet 20.
Optionally, according to some embodiments of the present invention, the contour line of the slit 30 includes a plurality of edges, and a rounded corner is disposed between two adjacent edges when an included angle between the two adjacent edges is less than or equal to 70 °.
In this embodiment, the contour line of the slit 30 includes a plurality of edges, and when the included angle between two adjacent edges is less than or equal to 70 °, the two adjacent edges are rounded, so as to avoid the sharp contour line of the slit 30, and further avoid the occurrence of the ignition phenomenon at the slit 30 caused by too high field intensity near the coupling structure 3.
As shown in fig. 6, the width L2 of the slit 30 may alternatively be 6mm or more, according to some embodiments of the present invention.
In this embodiment, too small a width L2 of the slit 30 may cause excessive energy per unit size passing through the slit 30, thereby easily causing a fire to occur, severely affecting the service life and output efficiency of the microwave assembly. Therefore, the width L2 of the slit 30 is set to 6mm or more, and the service life and output efficiency of the microwave assembly are ensured.
Optionally, the width L2 of the slit 30 is less than or equal to 0.2λ 1 。
According to some embodiments of the invention, optionally, the radiation dimension of the slit 30 is 0.4 or more λ 1 And less than or equal to 0.6λ 1 。
In this embodiment, the radiation size of the slit 30 is too large or too small, so that more cases will occur in which the electromagnetic wave of the target frequency cannot be fed out, and the passing effect on the microwaves of the specified frequency band is affected, and therefore, the radiation size of the slit 30 is set to 0.4λ 1 Up to 0.6λ 1 The feeding-out effect of microwaves can be ensured, so that microwaves emitted by the magnetron 1 smoothly pass through the slit 30 and energy is radiated into the cooking cavity 4 in multiple paths.
Specifically, for magnetron 1 excitation with a center frequency of 2.458GHz, the air wavelength is 120mm and the radiation size ranges between 48mm and 72 mm.
As shown in fig. 3 and 4, the waveguide 2 optionally includes: a first cavity 22 communicating with the magnetron 1; the second cavity 24 is arranged at one end of the first cavity 22 along the first direction, and the second cavity 24 is communicated with the first cavity 22; at least one of the two ends of the second cavity 24 protrudes from the first cavity 22 along the second direction, and the wall surface of the second cavity 24 along the third direction is provided with a microwave outlet 20, wherein the first direction, the second direction and the third direction are different.
In this embodiment, the waveguide 2 comprises a first cavity 22 and a second cavity 24. The first cavity 22 is communicated with the magnetron 1, the second cavity 24 is communicated with the first cavity 22, a microwave outlet 20 is formed in the wall surface of the second cavity 24 along the third direction, microwaves emitted by the magnetron 1 enter the second cavity 24 from the first cavity 22, and then enter the cooking cavity 4 from the microwave outlet 20 of the second cavity 24 after passing through the gap 30, so that a microwave heating function is realized. At least one of the two ends of the second cavity 24 along the second direction protrudes out of the first cavity 22, so that the second cavity 24 is longer than the first cavity 22 along the second direction, and the range of microwave allocation is further increased, so that the microwave can be uniformly heated under the action of the slit 30.
Optionally, in the second direction, both ends of the second cavity 24 protrude from the first cavity 22.
Alternatively, the waveguide 2 is T-shaped.
Optionally, the first direction, the second direction and the third direction are perpendicular to each other.
As shown in fig. 16, 17, 18 and 19, optionally, in the first direction, the length L of the first cavity 22 is greater than λ according to some embodiments of the invention 2 And/4, the length B of the second cavity 24 is 0.4 x (nλ) 2 ) And less than or equal to 0.6× (nλ) 2 ) The method comprises the steps of carrying out a first treatment on the surface of the In the second direction, the length W of the first cavity 22 is greater than or equal to 0.45λ 2 And less than or equal to 0.55λ 2 The length A of the second cavity 24 is greater than or equal to lambda 2 The method comprises the steps of carrying out a first treatment on the surface of the Wherein lambda is 2 The wave guide wavelength of the microwave emitted by the magnetron 1 is n which is a positive integer.
In this embodiment, the length L of the first cavity 22 is greater than 1/4 of the waveguide wavelength of the microwave emitted from the magnetron 1 in the first direction, and the length W of the first cavity 22 is greater than or equal to 0.45λ in the second direction 2 And less than or equal to 0.55λ 2 Ensuring smooth transmission of electromagnetic wave and reducing loss of electromagnetic wave. The length B of the second cavity 24 along the first direction is greater than or equal to 0.4× (nλ) 2 ) And less than or equal to 0.6× (nλ) 2 ) The length A of the second cavity 24 along the second direction is greater than or equal to lambda 2 The microwave energy distribution range can be improved, and heating uniformity can be further improved.
It will be appreciated that the length B of the second cavity 24 in the first direction is 0.4× (nλ or more 2 ) And less than or equal to 0.6× (nλ) 2 ) I.e. the length B of the second cavity 24 in the first direction is equal to (0.5nλ 2 )±(0.1nλ 2 ) So that the length B of the second cavity 24 in the first direction is n times 0.5λ 2 Nearby.
Optionally, the length W of the first cavity 22 is equal to 0.45λ 2 、0.46λ 2 、0.47λ 2 、0.48λ 2 、0.49λ 2 、0.5λ 2 、0.51λ 2 、0.52λ 2 、0.53λ 2 、0.54λ 2 、0.55λ 2 Any number of (a) is provided.
Optionally, the length B of the second cavity 24 is equal to 0.42× (nλ 2 )，0.44×(nλ 2 )、0.46×(nλ 2 )、0.48×(nλ 2 )、0.5×(nλ 2 )、0.52×(nλ 2 )、0.54×(nλ 2 )、0.56×(nλ 2 )、0.58×(nλ 2 )、0.6×(nλ 2 ) Any number of (a) is provided.
Alternatively, under 2.458GHz magnetron 1 excitation, i.e. L min > 43mm. At 2.458GHz magnetron 1 excitation, namely: b= (n×86 mm) ±0.2× (n×86 mm); at 2.458GHz magnetron 1 excitation, namely: a is that min =172 mm. The maximum of which must not exceed the dimensions of the side wall 46 of the cooking chamber 4.
Alternatively, the coupling structure 3 is mounted at a length dimension a=216 mm, a width dimension b=0.2 times (0.5λ 2 ) The purpose of this is to allow the slot 30 to be tuned up to three resonant energy peaks at the microwave outlet 20 (e.g. the waveguide termination base) of the waveguide 2, the two outermost energy peaks (energy peak numbered 1, energy peak numbered 3) being identical in phase and each being opposite in phase to the energy peak numbered 2, as shown in figures 3, 4 and 5.
The waveguide wavelength refers to the distance between two adjacent peaks or valleys of the composite wave propagating in the waveguide 2.
As shown in fig. 18 and 19, the magnetron 1 optionally includes an antenna cap 10, and the second cavity 24 includes a first region 240 and a second region 241, according to some embodiments of the invention; in the first direction, the first region 240 is disposed proximate to the first cavity 22, and the second region 241 is disposed distal to the first cavity 22; and the first region 240 and the second region 241 are adjacent to the antenna cap 10 in the second direction; wherein the first region 240 and the second region 241 are each 0.4λ or more in side length 1 And less than or equal to 06 lambda 1 The first region 240 corresponds to at least a portion of the at least one slit 30 and the second region 241 corresponds to at least a portion of the at least one slit 30.
In this embodiment, the magnetron 1 includes the antenna cap 10, the second cavity 24 includes a first region 240 and a second region 241, the first region 240 is adjacent to the first cavity 22 in a first direction, the second region 241 is distant from the first cavity 22 in the first direction, and the second region 241 isBoth the one area 240 and the second area 241 are adjacent to the antenna cap 10 in the second direction. The coupling structure 3 parts corresponding to the first region 240 and the second region 241 are respectively provided with at least one part of at least one slit 30, and the first region 240 and the second region 241 are square, and the side lengths of the first region 240 and the second region 241 are respectively greater than or equal to 0.4λ 1 And less than or equal to 0.6λ 1 And then the microwaves near the magnetron 1 are regulated and controlled, and the microwave energy of the cooking cavity 4 away from the coupling structure 3 is supplemented, so that the microwaves are more uniform in the cooking cavity 4, and the heating uniformity is improved.
It will be appreciated that the first region 240 and the second region 241 each correspond to at least one slit 30 along the third direction.
Alternatively, the first region 240 and the second region 241 each have a side length of 0.5λ 1 。
As shown in fig. 18 and 19, according to some embodiments of the present invention, optionally, a side of the first area 240 facing the first cavity 22 is attached to a wall surface of the second cavity 24 adjacent to the first cavity 22, and a side of the first area 240 facing the second area 241 is overlapped with a center of the antenna cap 10 along the first direction; one side of the second region 241 away from the first cavity 22 is attached to a wall surface of the second cavity 24 away from the first cavity 22, and one side of the second region 241 facing the first region 240 coincides with the center of the antenna cap 10 along the first direction.
In this embodiment, the specific distribution of the first region 240 and the second region 241 may be: one side of the first area 240 facing the first cavity 22 is overlapped with a wall surface of the second cavity 24, which is close to the first cavity 22 along the first direction, one side of the second area 241, which is far away from the first cavity 22, is overlapped with a wall surface of the second cavity 24, which is far away from the first cavity 22 along the first direction, and one side of the second area, which is close to the antenna cap 10, is overlapped with a connecting line of the center of the antenna cap 10 along the first direction. That is, the first area 240 and the second area 241 are respectively attached to the second cavity 24 along the first direction, and one sides of the first area 240 and the second area 241, which are close to the antenna cap 10, are respectively overlapped with the connecting line of the center of the antenna cap 10 along the first direction, so that the first area 240 and the second area 241 can regulate and control the microwave energy near the antenna cap 10, and the heating uniformity is improved.
Optionally, in the plane of the first direction and the second direction, the area of the slit 30 in the first region 240 is equal to or greater than 70% of the area of the slit 30, and the area of the slit 30 in the second region 241 is equal to or greater than 70% of the area of the slit 30 according to some embodiments of the present invention.
In this embodiment, the first region 240 and the second region 241 respectively correspond to 70% of the at least one slot 30, and when the radiation size of the slot 30 is out of range, the microwaves near the antenna cap 10 can be regulated.
Specifically, the first region 240 and the second region 241 correspond to 75% of the at least one slit 30, respectively.
As shown in fig. 17, the second cavity 24 optionally includes a third region 242 and a fourth region 243 distributed along the first direction, the third region 242 being located on a side of the fourth region 243 adjacent to the first cavity 22, according to some embodiments of the invention; the third region 242 corresponds to at least a portion of at least two slits 30.
In this embodiment, the second cavity 24 includes a third region 242 and a fourth region 243 distributed along the first direction, the third region 242 is located on one side of the fourth region 243 near the first cavity 22, and at least two slits 30 are provided at a portion of the coupling structure 3 corresponding to the third region 242 to regulate and control microwave energy of a portion near the magnetron 1 and supplement microwave energy of the entire cooking cavity 4 away from the coupling structure 3, thereby improving planar heating uniformity.
As shown in fig. 17, the third region 242 and the fourth region 243 may optionally have a volume of half that of the second cavity 24, respectively, according to some embodiments of the invention.
In this embodiment, the volumes of the third region 242 and the fourth region 243 are half of the second cavity 24, that is, the second cavity 24 is divided into two parts, i.e., an upper part and a lower part, and at least two slits 30 are provided on the coupling structure 3 corresponding to the upper part of the second cavity 24 to achieve the purpose of uniform heating.
Optionally, according to some embodiments of the invention, an area of the slit 30 located in the third region 242 is equal to or greater than 70% of an area of the slit 30.
In this embodiment, at least 70% of the slits 30 corresponding to the third region 242 fall within the third region 242 to ensure the regulatory capability of microwave energy and thus the reliability of uniform heating.
As shown in fig. 1 and 2, according to some embodiments of the present invention, there is also provided a cooking appliance including: a microwave assembly as in any one of the embodiments above.
The cooking utensil provided by the invention comprises the microwave component provided by any embodiment, so that the cooking utensil has all the beneficial effects of the microwave component.
As shown in fig. 1 and 2, according to some embodiments of the invention, optionally, the cooking appliance further comprises: the cooking cavity 4, the cooking cavity 4 is provided with an opening 40, the coupling structure 3 covers the opening 40, and microwaves emitted by the magnetron 1 enter the cooking cavity 4 through the opening 40 after passing through the slit 30.
In this embodiment, the cooking appliance comprises a cooking cavity 4, and the coupling structure 3 covers the opening 40 of the cooking cavity 4 to feed microwave energy into the cooking cavity 4 through the opening 40 for heating. The microwaves emitted by the magnetron 1 enter the cooking cavity 4 after passing through the gap 30, so that the microwave distribution in the cooking cavity 4 is more uniform, the uniformity of microwave heating is improved, a driving structure and an antenna structure are not required to be additionally arranged, the occupation of the space of the cooking cavity 4 is saved, and the manufacturing cost is reduced.
As shown in fig. 1, according to some embodiments of the invention, optionally, the cooking appliance further comprises: a partition plate 5; the cooking cavity 4 comprises a first wall surface 42 and a second wall surface 44 which are oppositely arranged, and a side wall 46 which is arranged around the first wall surface 42 and the second wall surface 44 in a surrounding manner; the partition 5 is provided on a first wall 42 of the cooking chamber 4, and the opening 40 is provided on a side wall 46 of the cooking chamber 4 or on a second wall 44 of the cooking chamber 4.
In this embodiment, the cooking appliance further comprises a partition 5, the partition 5 being able to be used for placing food. The first wall surface 42 and the second wall surface 44 which are oppositely arranged and the side wall 46 which is arranged between the first wall surface 42 and the second wall surface 44 are arranged to surround the cooking cavity 4, the partition board 5 is arranged on the first wall surface 42, the opening 40 is arranged on the side wall 46 or the second wall surface 44 of the cooking cavity 4, namely, the microwave component is arranged on the side wall 46 or the second wall surface 44 of the cooking cavity 4, so that the space below the first wall surface 42 of the cooking cavity 4 is not occupied, the height of the cooking cavity 4 is further reduced, and the manufacturing cost is reduced.
Alternatively, the first wall 42 is a bottom wall of the cooking cavity 4 and the second wall 44 is a top wall of the cooking cavity 4.
According to some embodiments of the invention, optionally, the cooking appliance comprises any one of a microwave oven, a micro-steaming all-in-one machine.
In this embodiment, the cooking appliance may be a microwave oven, a micro-steaming all-in-one machine.
In a specific application, the application provides a coupling structure 3 (specifically a multi-slit energy coupling structure) applied to a transmission waveguide terminal, and aims at the problems of insufficient reliability, heating uniformity and the like caused by excessive components in a microwave link system of a microwave oven, the structure distributes primary energy fields entering a cooking cavity 4 of the microwave oven in a multi-slit quasi-in-phase manner, so that energy distribution caused by an inherent resonance mode in the cooking cavity 4 is overlapped with the distributed primary energy fields, and the purpose of uniform heating is achieved. The application only uses a multi-slit energy coupling structure to replace the structures of an original mode stirrer, a stirring antenna, a stirring motor and the like, and the reliability of the multi-slit energy coupling structure under various working conditions is higher than that of a driving motor.
Further, the multi-slot energy coupling structure is mounted at the transmission waveguide termination region (which may be specifically mounted at the microwave outlet 20 of the second cavity 24): the definition of the termination area of the transmission waveguide and the associated definition are shown in fig. 16.
Wherein: w is the width of the transmission waveguide (e.g., first cavity 22). Which takes a value of about one half of the waveguide wavelength, specifically, the width W of the first cavity 22 is 0.45 lambda or more g And less than or equal to 0.55λ g ，λ g ＝λ 2 . At 2.458GHz magnetron 1 excitation, i.e. w=86 mm±8.6mm; l is the transmission length of the transmission waveguide. In order to convert the electromagnetic wave excited from the antenna cap 10 of the magnetron 1 into the electromagnetic wave of TE10 mode, L should be takenAt least greater than one quarter of the waveguide wavelength, i.e. L min ＞1λ g 4, L under excitation of 2.458GHz magnetron 1 min ＞43mm。
L side is the length of side wall 46 of cooking chamber 4 where waveguide 2 and coupling structure 3 can be mounted; h side is the height of the side wall 46 of the cooking chamber 4 where the waveguide 2 and the coupling structure 3 can be mounted; b is the width of the transmission waveguide termination region (e.g., second cavity 24). The dimensions of which are about an integer multiple of one half of the waveguide wavelength, i.e. B is equal to or greater than 0.4 x (nλ 2 ) And less than or equal to 0.6× (nλ) 2 ) N is 1, 2, 3, etc., under 2.458GHz magnetron 1 excitation, namely: b is more than or equal to 68.8 multiplied by n, and is less than or equal to 103.2 multiplied by n, wherein the maximum value of n is limited by the value of the side wall 46H_side, and B+L < H_side is satisfied; a is the length of the terminal region of the transmission waveguide, the dimension of which should be at least one waveguide wavelength lambda g At 2.458GHz magnetron 1 excitation, namely: a is that min =172 mm. The maximum value of which does not exceed the dimension L_side of the heating chamber sidewall 46, i.e. A max ＜L_side。
For example, this embodiment is installed at a length dimension a=216 mm, and a width dimension b=0.5λ g (B may be at 0.5λ) g On the basis of (1), up-and-down fluctuation is 0.1lambda g ) The purpose of this is to allow the slot 30 to be tuned up to three resonant energy peaks, as shown in figures 3 to 5, with the two outermost energy peaks (1 peak, 3 peak) being identical in phase and each being opposite in phase to the energy peak numbered 2. The electric field phase can also be seen indirectly from the magnetic field rotation direction in fig. 5 in combination with the ampere's law.
The resultant structure, which is mounted in the termination region of the transmission waveguide, has a radiation dimension of the slot 30 in the vicinity of half an air wavelength, i.e. (lambda) 1 /2)±(0.1λ 1 ) For excitation of the magnetron 1 with a center frequency of 2.458GHz, the air wavelength is 120mm and the radiation size ranges between 48mm and 72mm. This size specification allows microwave energy emitted from the magnetron 1 to pass smoothly through the coupling structure 3, multiplexing the energy into the heating chamber.
The radiation size refers to the linear distance between the farthest two points of the coupling slit 30. A labeled illustration of radiation size is shown in fig. 6. The shape of the slit 30 is not limited to rectangle, ring, U-shape, L-shape, X-shape, etc., and any shape that can cut the current on the surface of the waveguide terminal and meet the requirement of the radiation size can be designed as the corresponding slit 30, as shown in fig. 7 to 15, etc.
For the arrangement of the radiation slits 30, the following description is given:
(1) for a side-fed multi-slot energy coupling structure, at least two slots 30 should be disposed on the upper side of the transmission waveguide termination region (e.g., the third region 242) (75% of the area of the slot 30 falls into this region), and the angle of the slot 30 should be optimized. The purpose of this is to allocate the microwave energy closest to the magnetron 1 and to supplement the microwave energy of the entire cooking cavity 4 away from the coupling structure 3. The coupling slit 30 placed at the upper side of the terminal region of the transmission waveguide can improve planar heating uniformity.
(2) At least 1 slit 30 is provided in each of the first region 240 and the second region 241, and the first region 240 and the second region 241 are defined as shown in fig. 18 and 19, and the first region 240 and the second region 241 have a common dimension (λ) 1 /2)×(λ 1 2) for a magnetron 1 excitation with a central frequency of 2.458GHz, the dimensions are 60mm x 60mm. The difference is that the first region 240 is closely attached to the junction between the transmission waveguide and the upper edge of the waveguide terminal region, and the right boundary of the first region 240 coincides with the center of the antenna cap 10 of the magnetron 1 in the vertical direction; the second region 241 is closely attached to the lower edge of the waveguide terminal region, and the left boundary of the second region 241 coincides with the center of the antenna cap 10 of the magnetron 1 in the vertical direction.
(3) Here, a slit 30 is provided in each of the first region 240 and the second region 241, which means that most of the slit 30 (more than 75% of the area of the slit 30 itself) falls in this region, and does not mean that the slit 30 is entirely within this region. Since the design optimization of a specific radiation slit 30 may be slightly out of the region, but the body part for electromagnetic coupling is still in both regions, it is considered to be in this region.
Further, the width of the narrowest part of the slit 30 is larger than 6mm, and sharp forms such as acute angles are avoided, so that the purpose of this is to avoid the phenomenon of ignition at the slit 30 caused by too high field strength near the coupling structure 3.
As shown in fig. 20, it can be seen from the microwave port S parameter in the figure: simulation and actual measurement of the |S11| parameters are smaller than-10 dB in the bandwidth range of 2.3GHz-2.6GHz, and the fact that the microwave assembly provided by the application has good passing effect on electromagnetic waves in the bandwidth range can well feed electromagnetic wave energy into the cooking cavity.
Wherein: the S11 parameter reflects the ratio (typically expressed in dB) between reflected energy and incident energy for a microwave network having only one port, referred to as the return loss of that port. The smaller the ratio, the smaller the energy loss. Typically less than-10 dB is satisfactory in engineering applications. .
As shown in fig. 21, when the coupling structure 3 and the microwave assembly proposed in the present application are mounted on the side wall 46 of the cooking cavity 4, it can be seen that the temperatures of the various parts in the cooking cavity 4 are relatively uniform.
As shown in fig. 22, an infrared imaging diagram of a multi-slit energy coupling structure heating a 16 Gong Geshui load in an operating state is shown, and the temperature standard deviation is 3.0; as shown in fig. 23, for the heating effect of the microwave oven in the related art, the standard deviation of the temperature is 4.1, and the heating time, the water load weight and the initial temperature of the embodiment shown in fig. 22 and the embodiment shown in fig. 23 are consistent, it can be seen that the temperature field of the cooking appliance provided by the application is relatively uniform.
The embodiments presented herein allow the usable area of a user to be increased (as it frees up space for the original stirrer components) under the same physical dimensions. The stirring components in the microwave transmission link system are removed and replaced by a fixed coupling structure 3. The whole link system is reduced from five parts (magnetron 1- & gt waveguide 2- & gt waveguide terminal coupling window- & gt stirring sheet/stirring antenna- & gt cavity) to four parts (magnetron 1- & gt waveguide 2- & gt coupling structure 3- & gt cooking cavity 4), and the overall reliability of the product is improved. The assembly of the components is reduced, 3/2 components (driving motor, swivel, glass plate/driving motor and disturbance antenna) are reduced to 1 component (coupling structure 3), the manufacturing efficiency of the product can be improved, and meanwhile, the reliability of the product is improved.
In the present invention, the term "plurality" means two or more, unless explicitly defined otherwise. The terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; "coupled" may be directly coupled or indirectly coupled through intermediaries. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
In the description of the present specification, the terms "one embodiment," "some embodiments," "particular embodiments," and the like, mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only of the preferred embodiments of the present invention and is not intended to limit the present invention, but various modifications and variations can be made to the present invention by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (17)

1. A microwave assembly, comprising:
a magnetron for emitting microwaves;
a waveguide in communication with the magnetron, the waveguide including a microwave outlet;
the coupling structure covers the microwave outlet, a plurality of gaps are formed in the coupling structure, and microwave emitted by the magnetron can pass through the gaps;
the radiation size of the gap is more than or equal to 0.35 lambda 1 And less than or equal to 0.65lambda 1 ，
Wherein the maximum value of the connecting line between any two points on the contour line of the gap is the radiation size, and lambda is 1 The air wavelength of the microwaves emitted by the magnetron.
2. The microwave assembly of claim 1, wherein the slot has a shape comprising at least one of a U-shape, a C-shape, a T-shape, an L-shape, an X-shape, or an i-shape.
3. The microwave assembly of claim 1, wherein the contour of the slot comprises a plurality of edges, and wherein a rounded corner is provided between two adjacent edges at an included angle of 70 ° or less between the two adjacent edges.
4. The microwave assembly of claim 1, wherein the slot has a width of 6mm or greater.
5. The microwave assembly of claim 1, wherein the slot has a radiation size of 0.4λ or greater 1 And less than or equal to 0.6λ 1 。
6. A microwave assembly according to any one of claims 1 to 5 wherein the waveguide comprises:
a first cavity communicated with the magnetron;
the second cavity is arranged at one end of the first cavity along the first direction and is communicated with the first cavity;
along the second direction, at least one of the two ends of the second cavity protrudes out of the first cavity, the wall surface of the second cavity along the third direction is provided with the microwave outlet, and the first direction, the second direction and the third direction are different.
7. A microwave assembly according to claim 6, wherein,
in the first direction, the firstA cavity length greater than lambda 2 And/4, the length of the second cavity is greater than or equal to 0.4× (nλ) 2 ) And less than or equal to 0.6× (nλ) 2 )；
Along the second direction, the length of the first cavity is greater than or equal to 0.45λ 2 And less than or equal to 0.55λ 2 The length of the second cavity is greater than or equal to lambda 2 ，
Wherein the lambda is 2 The wave guide wavelength of the microwave emitted by the magnetron is the positive integer.
8. The microwave assembly of claim 7, wherein the magnetron comprises an antenna cap and the second cavity comprises a first region and a second region;
Along the first direction, the first region is arranged close to the first cavity, and the second region is arranged far away from the first cavity; and the first region and the second region are adjacent to the antenna cap along the second direction;
wherein the first region and the second region are each 0.4λ or more in side length 1 And less than or equal to 0.6λ 1 The first region corresponds to at least a portion of the at least one slot and the second region corresponds to at least a portion of the at least one slot.
9. The microwave assembly of claim 8, wherein a side of the first region facing the first cavity is in registry with a wall of the second cavity adjacent the first cavity, the side of the first region facing the second region being coincident with a center of the antenna cap in the first direction;
one side of the second area, which is far away from the first cavity, is attached to the wall surface of the second cavity, which is far away from the first cavity, and one side of the second area, which faces the first area, is overlapped with the center of the antenna cap along the first direction.
10. The microwave assembly of claim 8, wherein the area of the slot in the first region is 70% or more of the area of the slot in the plane in which the first direction and the second direction lie, and the area of the slot in the second region is 70% or more of the area of the slot.
11. The microwave assembly of claim 7, wherein the second cavity comprises a third region and a fourth region distributed along the first direction, the third region being located on a side of the fourth region proximate the first cavity;
the third region corresponds to at least a portion of at least two of the slits.
12. The microwave assembly of claim 11, wherein the third region and the fourth region each have a volume that is half of the second cavity.
13. The microwave assembly of claim 11, wherein the area of the slot in the third region is greater than or equal to 70% of the area of the slot.
14. A cooking appliance, comprising:
a microwave assembly as claimed in any one of claims 1 to 13.
15. The cooking appliance of claim 14, further comprising:
the cooking cavity is provided with an opening, the coupling structure covers the opening, and microwaves emitted by the magnetron enter the cooking cavity through the opening after passing through the gap.
16. The cooking appliance of claim 15, further comprising:
A partition plate;
the cooking cavity comprises a first wall surface and a second wall surface which are oppositely arranged, and side walls which are arranged around the first wall surface and the second wall surface in a surrounding manner;
the partition plate is arranged on the first wall surface of the cooking cavity, and the opening is positioned on the side wall of the cooking cavity or on the second wall surface of the cooking cavity.
17. The cooking appliance of any one of claims 14 to 16, wherein the cooking appliance comprises any one of a microwave oven, a micro-steaming all-in-one machine.
CN202311297601.9A 2023-10-09 2023-10-09 Microwave assembly and cooking utensil Pending CN117425240A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202311297601.9A CN117425240A (en) 2023-10-09 2023-10-09 Microwave assembly and cooking utensil

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202311297601.9A CN117425240A (en) 2023-10-09 2023-10-09 Microwave assembly and cooking utensil

Publications (1)

Publication Number Publication Date
CN117425240A true CN117425240A (en) 2024-01-19

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202311297601.9A Pending CN117425240A (en) 2023-10-09 2023-10-09 Microwave assembly and cooking utensil

Country Status (1)

Country Link
CN (1) CN117425240A (en)

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