Microwave processing box with inclined feed port
By employing an inclined feed design and grouping the modulators in the microwave processing box, the problems of microwave source mismatch and material inhomogeneity caused by feed coupling were solved, thereby improving energy efficiency and processing uniformity.
Patent Information
- Application Number
- CN202423064125.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-12
- Publication Date
- 2025-12-19
- Estimated Expiration
- 2034-12-12
AI Technical Summary
In existing microwave processing boxes, the mutual coupling between multiple feed ports leads to microwave source mismatch, low energy efficiency, reflected microwaves returning to the source end, reduced service life, and uneven material processing.
The inclined feed port design is adopted, and the electric field direction of the feed port cross section forms an acute or obtuse angle with the horizontal plane. The electric field directions of adjacent feed ports are perpendicular to each other or at 90 degrees. The group operation is achieved by a regulator to adapt to changes in material absorption, thereby improving matching and energy efficiency.
It achieves effective interaction between microwaves and materials, reduces reflection, improves energy utilization, prevents materials from scorching, and ensures uniform processing.
Smart Images
Figure CN223694027U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to the field of microwave, especially a microwave processing box with inclined feed port. BACKGROUND
[0002] The microwave processing box uses microwaves to process materials in the box, including but not limited to heating, thawing, drying, sterilization, sintering, etc. The utility model of household microwave oven and its wide application have promoted the research and production of microwave processing boxes for industrial and agricultural production. The ordinary microwave processing box includes a large size over-molded processing cavity, a plurality of feed ports on one surface or multiple surfaces of the processing cavity, one or more pallets in the processing cavity, and processed materials on or in the pallets. A shelf is provided in the processing cavity, and the pallet is placed on the shelf. In order to ensure uniformity of processing, the shelf can rotate around an axis. One microwave source is connected to each feed port and sends microwaves into the processing cavity through the feed port.
[0003] Since the multiple feed ports are coupled together, one of the main problems with this technical solution is that the microwave source cannot be matched with the processing cavity through the tuner, because any change in one feed port will change the load of the other microwave sources, resulting in mismatch of the other microwave sources. As a result, the microwave source is often in a mismatched state, and the microwaves fed into the processing cavity are reflected, resulting in a decrease in energy efficiency and the return of reflected microwaves to the microwave source, which severely reduces the service life of the microwave source.
[0004] The existing feed port is a rectangular feed port, and the long side of the rectangular feed port is often arranged in the horizontal direction. In general, solid materials on the pallet or liquid materials in the pallet are in a sheet shape, and the normal line of the sheet is in the vertical direction. When the long side of the rectangular feed port is arranged in the horizontal direction, the interaction between the microwaves and the materials is relatively weak, and the microwaves will pass through the materials to reach the other side of the processing cavity, form a standing wave in the processing cavity after reflection, and cause serious unevenness in the processing of the materials.
[0005] The above background technology is for the convenience of understanding the utility model, and is not a known technology publicly disclosed before the application of the utility model. UTILITY MODEL CONTENT
[0006] In view of the above defects, the utility model provides a microwave processing box with inclined feed port, which aims to improve at least one problem mentioned in the background technology.
[0007] The technical scheme is: a microwave processing box with inclined feed ports, comprising a processing cavity, at least one side of the processing cavity is provided with N feed ports, the feed ports are used for connecting microwave sources to feed microwaves into the processing cavity, the included angle between the electric field direction at the geometric center of the cross section of at least one feed port and the horizontal plane is an acute angle or an obtuse angle, and N is a natural number greater than or equal to 2.
[0008] The cross section of the feed port can be of any shape, such as a circular shape, an elliptical shape, a polygonal shape, a ridge waveguide, a double-ridge waveguide, etc. Preferably, the cross section of the feed port is rectangular, and the electric field direction at the geometric center thereof is perpendicular to the long side thereof.
[0009] Further, the processing cavity is in the shape of a cylinder or a cone with the axis along the vertical direction.
[0010] Further, the included angle between the electric field direction at the geometric center of the feed port and the horizontal plane is 30-60 degrees or 120-150 degrees.
[0011] Further, the horizontal cross section of the processing cavity is in the shape of a polygon.
[0012] Further, the processing cavity is in the shape of a cylinder or a cone with the axis along the vertical direction and the cross section in the shape of a quadrilateral, the side provided with the feed ports is one, two or three of the side A, the side B and the side C, and in the working process, the feed ports of the side A, the side B and the side C are divided into at least two groups, and the feed ports in the two groups work alternately.
[0013] Further, the included angle between the electric field direction at the geometric center of each feed port and the horizontal plane is 40-50 degrees or 130-140 degrees.
[0014] Further, in the N feed ports of each side, each feed port has at least one adjacent feed port in the horizontal direction or the vertical direction, and the included angle between the electric field directions at the geometric centers of the adjacent feed ports is 80-100 degrees.
[0015] Further, N is greater than or equal to 3, or N is greater than or equal to 4, or N is greater than or equal to 6.
[0016] Further, the pallet is in the shape of a plate, and the distance between the upper surface of the pallet and the center point of at least one feed port is less than 0.2 times or 0.4 times the minimum long side length of the feed port.
[0017] Further, the pallet is in the shape of a plate, and the upper surface of the pallet is flush with the center point of at least one feed port in the horizontal direction.
[0018] Compared with the prior art, the utility model has the advantages of:
[0019] The electric field directions at the geometric centers of the adjacent or opposite rectangular feed holes form an angle of 90 degrees, on the basis of strengthening the interaction between the microwaves and the materials, good isolation between the adjacent rectangular feed holes is realized. Meanwhile, all the feed holes are arranged on different sides and the feed holes on the different sides work alternately. When the materials absorb microwaves well, for example, the moisture content of the materials is relatively high, the first part of the feed holes arranged on some sides work. Since the matching of the feed holes is good at this time, larger power can be fed in through the feed holes to save processing time without causing larger reflection. When the materials absorb microwaves poorly, for example, the moisture content of the materials is relatively low, the microwave power fed in through the first part of the feed holes can be appropriately reduced. When the materials absorb microwaves more poorly, for example, the moisture content of the materials is lower, the second part of the feed holes arranged on other sides work. At this time, the microwave power through the second part of the feed holes can be appropriately reduced to prevent the materials from being scorched due to uneven heating. Meanwhile, the matching of the power divider arranged between each feed hole in the second part of the feed holes and the microwave source can be improved to improve energy efficiency.
[0020] The utility model discloses all the feed holes can be arranged into any shape, but the rectangle is best, the purpose is to let the electric field direction of the center of adjacent feed hole and opposite feed hole be perpendicular to each other. The feed hole arrangement is arranged on the side of the processing cavity, and the angle between the electric field direction at the geometric center of the rectangular feed hole and the horizontal direction is 45 degrees, which can make the microwave effectively penetrate the material. By letting the angle between the electric field directions at the geometric centers of the adjacent or opposite rectangular feed holes be 90 degrees, the coupling between the feed holes is effectively reduced. By grouping all the feed holes and working them in sequence, and arranging a power divider between a group or several groups of feed holes and the microwave source, the materials can be prevented from being overburned and the energy utilization efficiency can be improved according to the change of microwave absorption of the materials during the processing. The utility model can be used for microwave processing of various substances, including but not limited to drying, puffing, extraction and the like. BRIEF DESCRIPTION OF DRAWINGS
[0021] Figure 1 It is the whole structure schematic diagram of the utility model;
[0022] Figure 2 It is the one side feed hole distribution schematic diagram of the utility model;
[0023] Figure 3 It is the one column feed hole schematic diagram of the utility model;
[0024] Figure 4 It is the another column feed hole schematic diagram of the utility model;
[0025] In the drawing, 1 is processing cavity, 2 is feed hole, 3 is pallet, 4 is material. DETAILED DESCRIPTION
[0026] The utility model will be further described below with reference to the drawings.
[0027] In the description of the utility model, it needs to be explained that, unless there is explicit provision and limitation, the terms "mounting", "connection", "connection" should be understood in a broad sense, for example, it can be fixed connection, it can also be indirectly connected through intermediate medium, it can be the communication inside two elements or the interaction relationship of two elements. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0028] In the description of the utility model, it needs to be understood that the orientation or position relationship indicated by the terms "upper", "lower", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like is based on the orientation or position relationship shown in the drawings, and is only for the convenience of describing the utility model and simplifying the description, and is not indicative or suggestive of the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, therefore, it cannot be understood as a limitation on the utility model. In the description of the utility model, the meaning of "a plurality of" is two or more than two, unless there is another accurate and specific provision.
[0029] The terms "first", "second", "third", "fourth" and the like in the description of the present application and the above drawings (if any) are used to distinguish similar objects, and do not have to be used to describe a particular order or sequence. It should be understood that the data thus used can be interchanged under appropriate circumstances, so that the embodiments of the present application described herein can be implemented in an order other than that illustrated or described herein. In addition, the terms "include" and "have" and any variations thereof are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device including a series of steps or units does not have to be limited to those steps or units clearly listed, but can include other steps or units not clearly listed or inherent to these processes, methods, products or devices.
[0030] The term "feed" in the description of the present application and the above drawings refers to a hole leading to a processing cavity, generally a cylindrical or hollow conical metal body. The cross section of the feed port refers to the plan view obtained by tangentially cutting the feed port with the axis perpendicular to the plane.
[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the present application.
[0032] The technical scheme of the present application will be described in detail below with specific embodiments. The following specific embodiments can be combined with each other, and the same or similar concepts or processes can not be described again in some embodiments.
[0033] In the present application, the pallet can be any container for placing materials. According to the needs, the pallet is preferably in the form of a plate and a barrel with a height less than a diameter, but can also be in other shapes.
[0034] Please refer to Figures 1-2 , Figure 1 The present application is a schematic diagram of the overall structure, Figure 2 is a schematic diagram of the distribution of the side feed ports.
[0035] A microwave treatment box comprises a treatment cavity 1, which is rectangular, and is surrounded by side A, side B, side C and side D. At least one pallet 3 for placing materials 4 is arranged in the treatment cavity 1.
[0036] In one or more specific embodiments of the present application, 6 feed ports 2 are arranged on at least one of side A, side B and side C.
[0037] In another or more specific embodiments of the present application, 6 feed ports 2 are arranged on each of side A, side B and side C. At this time, when the materials are good at absorbing microwaves, such as when the moisture content of the materials is relatively high, the first part of the feed ports arranged on some sides are allowed to work. Since the matching of these feed ports is good at this time, a larger power can be fed through these feed ports to save the processing time without causing large reflection. When the materials are poor at absorbing microwaves, such as when the moisture content of the materials is relatively low, the microwave power fed through the first part of the feed ports can be appropriately reduced. When the materials are even poorer at absorbing microwaves, such as when the moisture content of the materials is even lower, the second part of the feed ports arranged on other sides are allowed to work. At this time, the microwave power through the second part of the feed ports can be appropriately reduced to prevent the materials from being scorched due to uneven heating.
[0038] In the present application, the feed ports 2 are used to connect the microwave source to feed microwaves into the inside of the treatment cavity 1.
[0039] The skilled in the art should understand that the shape of the processing cavity 1 can be a cylinder with the axis along the vertical direction, or a cone with the axis along the vertical direction, which is not particularly limited here, and the skilled in the art can select as needed.
[0040] The skilled in the art should also understand that the shape of the horizontal section of the processing cavity 1 is a polygon, which can be a triangle, a quadrilateral, or a pentagon, which is not particularly limited here, and the skilled in the art can select as needed.
[0041] In another or more specific embodiments of the present application, the angle between the long side of the feed port 2 and the horizontal plane is an acute angle or an obtuse angle, so the feed port 2 is an inclined feed port 2. The electric field direction at the geometric center of the feed port 2 is perpendicular to the long side of the feed port 2, and the angle between the electric field direction and the horizontal plane is an acute angle or an obtuse angle.
[0042] In another or more specific embodiments of the present application, in order to make the microwave more effectively penetrate the material, at this time, the angle between the electric field direction at the geometric center of the feed port 2 and the horizontal plane is 30°-60° or 120-150°.
[0043] In another or more specific embodiments of the present application, in order to make the microwave most effectively penetrate the material, at this time, the angle between the electric field direction at the geometric center of the feed port 2 and the horizontal plane is 45°.
[0044] In another or more specific embodiments of the present application, in the same side feed port 2, each feed port 2 has at least a horizontally or vertically adjacent feed port 2, and the angle between the electric field directions at the geometric centers of the adjacent feed ports 2 is 60-120°, which can effectively reduce the coupling between the adjacent feed ports 2.
[0045] In another or more specific embodiments of the present application, in the same side feed port 2, when the angle between the electric field directions at the geometric centers of the adjacent feed ports 2 is 90°, the coupling between the adjacent feed ports 2 can be most effectively reduced.
[0046] In another or more specific embodiments of the present application, the feed ports 2 on any one of the side A, the side B, or the side C are distributed in rows and columns, the angle between the electric field directions at the geometric centers of the adjacent row feed ports 2 is 90°, and the angle between the electric field directions at the geometric centers of the adjacent column feed ports 2 is 90°, at this time, the best isolation effect can be obtained.
[0047] In another or more embodiments of the utility model, the center point of at least one of the feedthroughs 2 in the side A coincides with the center point of one of the feedthroughs 2 in the side C, and the included angle between the electric field directions at the geometric centers of the two feedthroughs 2 is 60-120°, so that better isolation is achieved.
[0048] In another or more embodiments of the utility model, the included angle between the electric field directions at the geometric centers of the two feedthroughs 2 is 90°, so that better isolation is achieved.
[0049] In another or more embodiments of the utility model, the pallet 3 is of a plate structure, and the spacing between the upper surface of the pallet 3 and the center point of at least one of the feedthroughs 2 is less than 0.1, 0.2 or 0.4 times the minimum long side length of the feedthrough 2.
[0050] In another or more embodiments of the utility model, the pallet 3 is of a plate structure, and the upper surface of the pallet 3 is flush with the center point of at least one of the feedthroughs 2 in the horizontal direction.
[0051] In another or more embodiments of the utility model, the pallet 3 comprises a bottom and a side, which enclose a cylindrical hollow portion or a conical hollow portion, and the spacing between the height center point of the cylindrical hollow portion or the conical hollow portion and the center point of at least one of the feedthroughs 2 in the vertical direction is less than 0.2 or 0.4 times the minimum long side length of the rectangular feedthrough 2, and the height center point of the cylindrical hollow portion or the conical hollow portion is flush with the center point of at least one of the feedthroughs 2 in the vertical direction. In this case, better heating effect can be achieved.
[0052] In another or more embodiments of the utility model, a shelf is further arranged in the processing cavity 1, and the pallet 3 is placed on the shelf in layers, and the material of the shelf is preferably a wave-transparent medium material with weak microwave absorption.
[0053] In another or more embodiments of the utility model, in order to improve uniformity, the shelf can rotate around a vertical axis.
[0054] In another or more embodiments of the utility model, a distributor is arranged between at least one of the feedthroughs on the side B and the microwave source.
[0055] Please refer to Figures 3-4 , Figure 3 A total of three rectangular feedthroughs 2 are shown in a column along the vertical direction, Figure 4 A total of four rectangular feedthroughs 2 are shown in a column along the vertical direction.
[0056] In the utility model, the rectangle in the rectangular feed port 2 can be a geometric rectangle, or a rectangle with an included angle between the long side and the wide side being a chamfer, or a rectangle with the long side being an arc.
[0057] During operation, solid or liquid materials can be spread on the bottom of the pallet 3 or in the pallet 3.
[0058] The utility model also provides a microwave working mode which adopts the microwave processing box.
[0059] A microwave working mode which adopts the microwave processing box, comprising:
[0060] The feed port 2 on the side of the processing cavity 1 is set as a rectangular feed port 2, the microwave polarization direction between any one rectangular feed port 2 on one side and the adjacent rectangular feed port 2 is perpendicular, the microwave polarization direction between the mutually corresponding rectangular feed ports 2 on the opposite sides is perpendicular, good isolation between the feed ports 2 is realized, the electric field direction at the geometric center of each rectangular feed port 2 forms a 45-degree included angle with the horizontal direction, so as to strengthen the interaction between the microwave and the materials 4. Different feed ports 2 on different sides are alternately operated, and a distributor is added between the feed ports 2 operating later and the processing cavity 1 to improve the heating efficiency and protect the microwave source.
[0061] The above only describes the preferred embodiments of the utility model and is not used for limiting the utility model. For those skilled in the art, the utility model can have various changes and variations. Any modification, equivalent replacement, improvement, etc. within the spirit and principle of the utility model should be included in the protection scope of the utility model.
Claims
1. A microwave processing chamber with slanted feed ports, comprising a processing cavity (1), at least one of the sides enclosing the processing cavity (1) is provided with N feed ports (2) for connecting a microwave source to feed microwaves into the interior of the processing cavity (1), characterized in that, The angle between the electric field direction at the geometric center of the cross section of at least one of the feedthroughs (2) and the horizontal plane is an acute angle or an obtuse angle, and N is a natural number greater than or equal to 2.
2. The microwave processing box with a slanted feed port according to claim 1, characterized in that, The processing cavity (1) is in the shape of a cylinder or a cone with the axis in the vertical direction.
3. The microwave processing box with a slanted feed port according to claim 1, wherein, The angle between the electric field direction at the geometric center of the feedthrough (2) and the horizontal plane is 30-60° or 120-150°.
4. The microwave processing box with a slanted feed port according to claim 1, wherein, The horizontal cross section of the processing cavity (1) is in the shape of a polygon.
5. The microwave processing kit with slanted feed of claim 4, wherein, The processing cavity (1) is in the shape of a cylinder or a cone with the axis in the vertical direction and the cross section in the shape of a quadrilateral, and the side face on which the feedthrough (2) is arranged is one, two or three of the side face A, the side face B and the side face C, and in the working process, the feedthroughs (2) on the side face A, the side face B and the side face C are divided into at least two groups, and the feedthroughs (2) on the two groups work alternately.
6. The microwave processing kit with slanted feed of claim 5, wherein, The angle between the electric field direction at the geometric center of each feedthrough (2) and the horizontal plane is 40-50° or 130-140°.
7. The microwave processing kit with slanted feed of claim 6, wherein, In the N feedthroughs (2) on each side face, each feedthrough (2) has at least one adjacent feedthrough (2) in the horizontal direction or the vertical direction, and the angle between the electric field directions at the geometric centers of the adjacent feedthroughs (2) is 80-100°.
8. A microwave processing enclosure with slanted feedhorns according to any one of claims 6 or 7, characterized in that, N is greater than or equal to 3 or N is greater than or equal to 4 or N is greater than or equal to 6.
9. The microwave processing oven with slanted feed of claim 1, wherein, The pallet (3) is further included, and the pallet (3) is in the shape of a plate, and the distance between the upper surface of the pallet (3) and the center point of at least one of the feedthroughs (2) is less than 0.2 times or 0.4 times the minimum length of the long side of the feedthrough (2).
10. The microwave processing oven with slanted feed of claim 1, wherein, The pallet (3) is further included, and the pallet (3) is in the shape of a plate, and the upper surface of the pallet (3) is flush with the center point of at least one of the feedthroughs (2) in the horizontal direction.