CN113015282A

CN113015282A - Microwave device

Info

Publication number: CN113015282A
Application number: CN201911314309.7A
Authority: CN
Inventors: 魏浩胤; 徐小亮; 汪磊; 汤志高
Original assignee: Jiangsu Mcvey Microwave Technology Co ltd
Current assignee: Jiangsu Mcvey Microwave Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2021-06-22

Abstract

The invention discloses a microwave device which comprises a box body, a crack antenna, a tuner, a waveguide tube and a microwave generator, wherein a plurality of waveguide holes are formed in the crack antenna, the plurality of waveguide holes are arranged along the extending direction of the crack antenna, the crack antenna is arranged on the side wall of the box body, the waveguide holes in the crack antenna are communicated with an accommodating cavity of the box body, the crack antenna, the tuner, the waveguide tube and the microwave generator are sequentially connected, a storage rack for placing objects is arranged in the box body, the box body is a prism, and the cross section of the box body is polygonal and at least has five edges. The microwave emitted by the microwave generator is fed into the containing cavity of the box body through the waveguide tube, the tuner and the slot antenna, and the microwave is repeatedly reflected on the inner side wall of the box body, so that the intensity of the microwave field in the box body is more uniform, and more microwave field modes are provided, and the object is heated more uniformly.

Description

Microwave device

Technical Field

The invention relates to the technical field of microwave heating, in particular to a microwave device.

Background

Microwaves have excellent properties such as heating and sterilization, and as the microwave technology is mature, the microwave technology is applied to various fields. The microwave heating is generated by utilizing elastic collision and friction between polar molecule vibration and surrounding molecules, the heating mode is generated from the interior of a product material, the food is heated by utilizing the method after being heated again, the method has the advantages of low production cost, high efficiency, no bacteria growth of the product and small occupied area, and is incomparable with other technological methods, and industrial microwave equipment serving as a flow production line is generally longer and larger, and the safety is also important.

Microwave thawing is realized by heating an object through microwaves, and microwave thawing is used as a novel thawing mode and has the characteristics of high thawing speed, no pollution, energy conservation, high product quality and the like. Once launched, the international market is rapidly occupied. However, the existing microwave device is a cube with a single microwave mode, which inevitably generates areas with stronger and weaker microwave fields, and the heating position is fixed, so that the phenomenon of uneven heating exists in the heating process, which is also an obstacle to further development of the microwave technology.

Disclosure of Invention

In order to overcome the defects and shortcomings in the prior art, the invention aims to provide a microwave device to solve the problem that the object is not uniformly heated due to nonuniform intensity of a microwave field of the microwave device in the prior art.

The purpose of the invention is realized by the following technical scheme:

the invention provides a microwave device, which comprises a box body, a slot antenna, a tuner, a waveguide tube and a microwave generator, wherein the slot antenna is provided with a plurality of waveguide holes, the plurality of waveguide holes are arranged along the extending direction of the slot antenna, the slot antenna is arranged on the side wall of the box body, the waveguide holes in the slot antenna are communicated with an accommodating cavity of the box body, the slot antenna, the tuner, the waveguide tube and the microwave generator are sequentially connected, a storage rack for placing objects is arranged in the box body, the box body is a prism, and the cross section of the box body is polygonal and at least has five edges.

Further, the cross section of the box body is in a hexagon shape.

Furthermore, the microwave device further comprises a power divider, the slot antenna comprises a first slot antenna and a second slot antenna, and the first slot antenna and the second slot antenna are respectively arranged on two different side walls of the box body and are connected with the tuner through the power divider.

Further, the orientation of the waveguide hole on the first slot antenna and the orientation of the waveguide hole on the second slot antenna form an included angle of 10-30 degrees.

Further, the waveguide hole on the first slot antenna and the waveguide hole on the second slot antenna are vertically offset from each other.

Further, the length of the waveguide holes on each split antenna is greater than or equal to the distance between the waveguide holes, the midpoint of the waveguide hole on the first split antenna is vertically aligned with the midpoint of the distance between two adjacent waveguide holes on the second split antenna, and the midpoint of the waveguide hole on the second split antenna is vertically aligned with the midpoint of the distance between two adjacent waveguide holes on the first split antenna.

Further, two adjacent waveguide holes on the slot antenna are mutually staggered in the horizontal direction.

Furthermore, the waveguide hole is long-strip-shaped, and the extending direction of the waveguide hole is the same as the extending direction of the slot antenna.

Further, this supporter adopts the metal material to make, and this supporter rotates with this box to be connected, is equipped with on this box to be used for driving this supporter pivoted motor.

Further, be equipped with a plurality of feeder forks and a plurality of thing tray of putting on this supporter, a plurality of these feeder forks are located the different layers respectively, have placed one on every feeder fork and should have put the thing tray.

The invention has the beneficial effects that: the microwave device comprises a box body, a crack antenna, a tuner, a waveguide tube and a microwave generator, wherein a plurality of waveguide holes are formed in the crack antenna and are arranged along the extending direction of the crack antenna, the crack antenna is arranged on the side wall of the box body, the waveguide holes in the crack antenna are communicated with an accommodating cavity of the box body, the crack antenna, the tuner, the waveguide tube and the microwave generator are sequentially connected, a storage rack for placing objects is arranged in the box body, the box body is a prism, and the cross section of the box body is polygonal and at least has five edges. The microwave emitted by the microwave generator is fed into the containing cavity of the box body through the waveguide tube, the tuner and the slot antenna, and the microwave is repeatedly reflected on the inner side wall of the box body, so that the intensity of the microwave field in the box body is more uniform, and more microwave field modes are provided, and the object is heated more uniformly.

Drawings

FIG. 1 is a schematic perspective view of a microwave device according to the present invention;

FIG. 2 is a schematic diagram of a front plan view of a microwave device according to the present invention;

FIG. 3 is a schematic side view of a microwave device according to the present invention;

FIG. 4 is a schematic cross-sectional view of the case of the present invention;

fig. 5 is a schematic front plan view of the slot antenna of the present invention.

In the figure: the microwave oven comprises a box body 10, an accommodating cavity 101, a shelf 11, a branch shelf 111, a storage tray 112, a motor 12, a box door 13, a control box 14, a slot antenna 20, a waveguide hole 201, a first slot antenna 21, a second slot antenna 22, a power divider 30, a tuner 40, a waveguide 50 and a microwave generator 60.

Detailed Description

To further illustrate the technical means and effects of the present invention adopted to achieve the predetermined objects, the following detailed description of the embodiments, structures, features and effects of the microwave device according to the present invention will be made with reference to the accompanying drawings and preferred embodiments as follows:

fig. 1 is a front perspective view of a microwave device according to the present invention, fig. 2 is a front plan view of a microwave device according to the present invention, fig. 3 is a side perspective view of a microwave device according to the present invention, fig. 4 is a sectional view of a case according to the present invention, and fig. 5 is a front plan view of a slot antenna according to the present invention.

As shown in fig. 1 to 5, the microwave device according to the present invention includes a case 10, a slot antenna 20, a tuner 40, a waveguide 50, and a microwave generator 60. The slot antenna 20 is disposed on a side wall of the case 10, and the slot antenna 20, the tuner 40, the waveguide 50, and the microwave generator 60 are connected in sequence. The microwave generator 60 is used for emitting microwaves, the waveguide 50 is used for guiding the microwaves to the tuner 40, the tuner 40 is a three-pin tuner, the tuner 40 is used for reducing the reflection coefficient of the microwave device, the energy utilization rate of the microwave device is maximized, and the microwaves generated by the microwave generator 60 feed the energy into the box body 10 through the waveguide 50 and the crack antenna 20. For a more detailed description of the dispenser 40, the waveguide 50 and the microwave generator 60, reference is made to the prior art and no further description is given here.

Wherein, the box 10 is hollow structure, has the chamber 101 that holds the object, is equipped with the supporter 11 that is used for placing the object in the chamber 101 that holds of box 10. Box 10 and supporter 11 adopt the metal material to make, and supporter 11 rotates with box 10 to be connected, is equipped with on the box 10 to be used for driving 11 pivoted motors 12 of supporter, and both ends are equipped with the pivot about 11 of supporter, and supporter 11 rotates through the upper and lower bottom surface of pivot with box 10 to be connected, and motor 12 sets up at the top of box 10 and is connected with the pivot on the supporter 11. When the shelf 11 rotates, the microwave will be reflected differently at different positions on the shelf 11, so that the microwave mode in the box 10 is changed continuously, further the microwave field in the box 10 is disturbed, and the purpose of uniform thawing is achieved. The shelf 11 is provided with a plurality of shelves 111 and a plurality of shelves 112, the shelves 111 are respectively located at different layers (different heights), and the shelves 112 are made of materials with weak microwave absorbing ability, such as tetrafluoro shelves, glass shelves, ceramic shelves or PP shelves (glass fiber reinforced polypropylene shelves). In this embodiment, the shelf 11 has four sub-shelves 111 and is located in four layers. An article tray 112 is placed on each branch shelf 111, the branch shelves 111 and the article shelf 11 are integrally formed, and the article tray 112 and the branch shelves 111 are detachable.

The case 10 is a prism, and the cross section of the case 10 (a section perpendicular to the extending direction of the case 10) is a polygon and has at least five sides, that is, the case 10 is at least a pentagonal prism, for example, the case 10 may also be an octagonal prism, a dodecagonal prism, or the like. Preferably, the housing 10 is not a regular prism, i.e., the cross-section of the housing 10 is not a regular polygon, to disrupt the direction of reflection of the microwaves from the side walls of the housing 10, resulting in more microwave field patterns within the housing 10. As shown in fig. 4, in the present embodiment, the cross section of the box 10 is a hexadecagon shape, that is, the box 10 is a hexadecagonal prism, the box 10 has sixteen side surfaces, and the cross section of the box 10 has a left-right symmetric structure.

Of course, the box 10 is provided with a box door 13 for placing the object to be heated on the storage tray 112. The box door 13 has a double-door structure, the two box doors 13 are respectively located on two different side surfaces of the box body 10, the microwave suppression structure is arranged on the box door 13, or the box door 13 is made of a material capable of suppressing microwave, so that the microwave leakage can be well prevented. The side wall of the box body 10 is further provided with a control box 14, and the control box 14 is used for controlling the normal operation and the operation mode of the microwave device. A water outlet is arranged at the bottom of the box body 10, because water is generated during the unfreezing process of the object, the water generated by unfreezing can conveniently flow out through the water outlet, and the object placing frame 11 can be conveniently cleaned by water after unfreezing.

The slot antenna 20 is a hollow structure, a plurality of waveguide holes 201 are formed in the slot antenna 20, the plurality of waveguide holes 201 are arranged along the extending direction (vertical direction) of the slot antenna 20, the slot antenna 20 is disposed on the side wall of the box body 10, and the waveguide holes 201 in the slot antenna 20 are communicated with the accommodating cavity 101 of the box body 10. As shown in fig. 5, in the present embodiment, the waveguide hole 201 is elongated, two ends of the waveguide hole 201 are semicircular, and the extending direction of the waveguide hole 201 is the same as the extending direction of the slot antenna 20, that is, both the extending directions are along the vertical direction. Two adjacent waveguide holes 201 on the slot antenna 20 are staggered from each other in the horizontal direction, and the waveguide holes 201 on the slot antenna 20 are not arranged along a vertical straight line, but two adjacent waveguide holes 201 are respectively located on two different vertical lines. So that microwaves are fed into the enclosure 10 at different locations from different waveguide holes 201, resulting in more microwave field modes within the enclosure 10.

In this embodiment, the microwave apparatus further includes a power divider 30, the number of the slot antennas 20 is at least two, the slot antennas 20 include a first slot antenna 21 and a second slot antenna 22, the first slot antenna 21 and the second slot antenna 22 are respectively disposed on two different sidewalls of the box 10 and are connected to the tuner 40 through the power divider 30, and the tuner 40 evenly distributes energy to the first slot antenna 21 and the second slot antenna 22 through the power divider 30. As shown in fig. 4, the slot antenna 20 has a rectangular cross section, and the first slot antenna 21 and the second slot antenna 22 are symmetrically disposed on the side wall of the housing 10. The included angle alpha formed by the orientation of the waveguide hole 201 on the first slot antenna 21 and the orientation of the waveguide hole 201 on the second slot antenna 22 is 10-30 degrees, even if the direction of the microwave fed into the waveguide hole 201 on the first slot antenna 21 and the direction of the microwave fed into the waveguide hole 201 on the second slot antenna 22 are 10-30 degrees, the back surface of the first slot antenna 21 is flush with one side wall of the box 10, the back surface of the second slot antenna 22 is flush with the other side wall of the box 10, the included angle beta formed by the back surface of the first slot antenna 21 and the back surface of the second slot antenna 22 is 150-170 degrees, preferably, beta is 160 degrees and alpha is 20 degrees, so that the direction of the microwave fed into the box 10 from the first slot antenna 21 and the second slot antenna 22 forms a 20 degree included angle, and further more microwave field modes are provided in the box 10. Of course, in other embodiments, the number of the slot antennas 20 may also be three and located on different side walls of the box 10, that is, the slot antennas 20 include the first slot antenna 21, the second slot antenna 22, and the third slot antenna, which is not limited thereto.

As shown in fig. 5, in the present embodiment, the waveguide hole 201 on the first slot antenna 21 and the waveguide hole 201 on the second slot antenna 22 are vertically displaced from each other. The length of the waveguide holes 201 on each slot antenna 20 is greater than or equal to the distance between the waveguide holes 201, the midpoint of the waveguide hole 201 on the first slot antenna 21 is aligned with the midpoint of the distance between two adjacent waveguide holes 201 on the second slot antenna 22 in the vertical direction, the midpoint of the waveguide hole 201 on the second slot antenna 22 is aligned with the midpoint of the distance between two adjacent waveguide holes 201 on the first slot antenna 21 in the vertical direction, that is, the length of the waveguide hole 201 on the first slot antenna 21 completely covers the distance between two adjacent waveguide holes 201 on the second slot antenna 22 in the vertical direction, so that the slot antennas 20 have microwaves fed into the box 10 at different heights, and the uniformity of the microwave field distribution in the vertical direction can be well guaranteed. The number of waveguide holes 201 on the first split antenna 21 is different from the number of waveguide holes 201 on the second split antenna 22, six waveguide holes 201 being provided on the first split antenna 21, and seven waveguide holes 201 being provided on the second split antenna 22.

In summary, the box 10 is configured as a sixteen-prism shape, the shelf 11 in the box 10 is made of metal and is rotatably connected with the box 10, the waveguide holes 201 on the first slot antenna 21 and the waveguide holes 201 on the second slot antenna 22 are vertically staggered, and after the microwaves emitted by the microwave generator 60 are fed into the accommodating cavity 101 of the box 10 through the waveguide 50, the tuner 40 and the slot antenna 20, the microwaves are repeatedly reflected on the inner side wall of the box 10 and the rotating shelf 11, so that the intensity of the microwave field in the box 10 is more uniform, and more microwave field patterns are provided, so that objects are heated more uniformly.

In this document, the terms upper, lower, left, right, front, rear and the like are used for defining the positions of the structures in the drawings and the positions of the structures relative to each other, and are only used for the clarity and convenience of the technical solution. It is to be understood that the use of the directional terms should not be taken to limit the scope of the claims. It is also to be understood that the terms "first" and "second," etc., are used herein for descriptive purposes only and are not to be construed as limiting in number or order.

Although the present invention has been described with reference to the preferred embodiments, it should be understood that various changes, substitutions and alterations can be made herein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims

1. The microwave device is characterized by comprising a box body (10), a crack antenna (20), a tuner (40), a waveguide tube (50) and a microwave generator (60), wherein a plurality of waveguide holes (201) are formed in the crack antenna (20), the plurality of waveguide holes (201) are arranged along the extending direction of the crack antenna (20), the crack antenna (20) is arranged on the side wall of the box body (10), the waveguide holes (201) in the crack antenna (20) are communicated with an accommodating cavity (101) of the box body (10), the crack antenna (20), the tuner (40), the waveguide tube (50) and the microwave generator (60) are sequentially connected, a storage rack (11) for placing objects is arranged in the box body (10), the box body (10) is a prism body, and the cross section of the box body (10) is polygonal and at least has five edges.

2. Microwave device according to claim 1, characterized in that the cross-section of the tank (10) is hexadecagonal.

3. The microwave device according to claim 1, further comprising a power divider (30), wherein the slot antenna (20) comprises a first slot antenna (21) and a second slot antenna (22), and the first slot antenna (21) and the second slot antenna (22) are respectively disposed on two different sidewalls of the box (10) and connected to the power divider (40) through the power divider (30).

4. A microwave device according to claim 3, characterized in that the orientation of the waveguide hole (201) in the first slot antenna (21) and the orientation of the waveguide hole (201) in the second slot antenna (22) are at an angle of 10 ° -30 °.

5. A microwave device according to claim 3, characterized in that the waveguide holes (201) of the first slot antenna (21) and the waveguide holes (201) of the second slot antenna (22) are vertically displaced from each other.

6. The microwave device according to claim 5, wherein the length of the waveguide holes (201) on each slot antenna (20) is greater than or equal to the distance between the waveguide holes (201), the midpoint of the waveguide hole (201) on the first slot antenna (21) is vertically aligned with the midpoint of the distance between two adjacent waveguide holes (201) on the second slot antenna (22), and the midpoint of the waveguide hole (201) on the second slot antenna (22) is vertically aligned with the midpoint of the distance between two adjacent waveguide holes (201) on the first slot antenna (21).

7. The microwave arrangement according to claim 1, characterized in that two adjacent waveguide holes (201) of the slot antenna (20) are horizontally displaced from each other.

8. The microwave device according to claim 1, wherein the waveguide hole (201) is elongated, and the waveguide hole (201) extends in the same direction as the slot antenna (20).

9. The microwave device according to claim 1, wherein the rack (11) is made of metal, the rack (11) is rotatably connected to the box (10), and the box (10) is provided with a motor (12) for driving the rack (11) to rotate.

10. The microwave device according to claim 1, wherein the rack (11) is provided with a plurality of shelves (111) and a plurality of trays (112), the shelves (111) are respectively located at different levels, and each shelf (111) is provided with one tray (112).