Microwave oven
By installing a conductive patch microwave absorber with a resonant frequency matching on the microwave oven platform, the problem of uneven heating in microwave ovens is solved, achieving more uniform heating and improved energy efficiency.
Patent Information
- Application Number
- CN202422117641.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-08-29
- Publication Date
- 2025-12-23
- Estimated Expiration
- 2034-08-29
AI Technical Summary
Microwave ovens heat unevenly, resulting in areas that are too cold or too hot, and the heating is not uniform.
A microwave absorber is installed on the microwave oven's platform. The microwave absorber consists of conductive patches, and its resonant frequency matches the frequency of the microwave generator. It absorbs and converts microwaves into heat energy, reduces reflection and standing wave fields, and improves energy transfer efficiency.
It improves the heating uniformity and energy efficiency of microwave ovens, reduces energy reflection, and enhances safety.
Smart Images
Figure CN223709716U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the cooking technical field, in particular to a microwave oven. BACKGROUND
[0002] In the related art, the microwave oven is not uniform in heating food, which is prone to cause local overcooling or overheating, and the uniformity of heating is poor. CONTENT
[0003] Therefore, the embodiments of the present application aim to provide a microwave oven to improve the uniformity of heating.
[0004] To achieve the above-mentioned purpose, an embodiment of the present application provides a microwave oven, comprising:
[0005] A main oven having a cooking cavity and a microwave receiving hole in communication with the cooking cavity;
[0006] A microwave generator installed in the main oven, wherein the microwave generated by the microwave generator enters the cooking cavity through the microwave receiving hole;
[0007] A carrier table located in the cooking cavity;
[0008] A microwave absorber installed on the carrier table, wherein the microwave absorber is used to absorb microwaves in the cooking cavity and convert them into heat energy.
[0009] In an embodiment, the material of the carrier table is an insulating material, the material of the microwave absorber can conduct electricity, the microwave absorber includes at least two patch groups, each patch group includes at least two conductive patches, the at least two conductive patches are arranged at intervals, and the resonant frequency of the microwave absorber is within the frequency range of the microwaves generated by the microwave generator.
[0010] In an embodiment, the at least two conductive patches in each patch group are arranged along a first direction, and the at least two patch groups are arranged along a second direction, wherein the first direction and the second direction are arranged in a cross manner.
[0011] In an embodiment, the gap between the adjacent two conductive patches ranges from 3mm to 5mm.
[0012] In an embodiment, the shape of the conductive patch is a square, and the length of the side of the conductive patch ranges from 10mm to 12mm.
[0013] In an embodiment, the corresponding resonant frequency of the microwave absorber ranges from 2.26Hz to 2.79Hz.
[0014] In an embodiment, the microwave receiving hole is located below the object table, the object table has a carrying area for carrying food, the conductive patch is located outside the carrying area, the carrying area is provided with the conductive patch on opposite sides along the first direction, and the carrying area is provided with the conductive patch on opposite sides along the second direction.
[0015] In an embodiment, the area of the carrying area is greater than the area of the conductive patch.
[0016] In an embodiment, the frequency of the microwave generated by the microwave generator is the same as the resonant frequency of the microwave absorber.
[0017] In an embodiment, the material of the conductive patch is graphene or artificial magnetic conductor.
[0018] In an embodiment, the main oven comprises:
[0019] an oven body;
[0020] a metal container installed in the oven body, the microwave generator is located between the metal container and the oven body, and the cooking cavity and the receiving hole are formed in the metal container.
[0021] In the embodiments of the present application, the microwave absorber is installed on the object table, used to absorb the microwaves in the cooking cavity and convert them into heat energy, so as to reduce the reflection of microwaves in the microwave oven, weaken the standing wave field of microwaves, improve the energy near the food on the object table, and thus make the heating of the microwave oven more uniform. The microwave absorber can also reduce the reflection of energy back to the microwave generator, so as to not only improve the energy efficiency of the microwave oven, but also improve the safety of the microwave oven. BRIEF DESCRIPTION OF DRAWINGS
[0022] Figure 1 FIG. 1 is a structural schematic diagram of a microwave oven according to an embodiment of the present application, wherein the thickness of the conductive patch is exaggerated, and the number of conductive patches in the figure does not represent the specific number of conductive patches on the object table;
[0023] Figure 2 FIG. 2 is a distribution schematic diagram of the conductive patches on the object table of the microwave oven;
[0024] Figure 3 FIG. 3 is a diagram of microwave frequency and reflection phase.
[0025] BRIEF DESCRIPTION OF DRAWINGS
[0026] 1, main oven; 11, oven body; 12, metal container; 121, cooking cavity; 122, receiving hole; 2, microwave generator; 3, object table; 31, carrying area; 4, microwave absorber; 41, conductive patch. DETAILED DESCRIPTION
[0027] It should be noted that the embodiments and technical features in the present application can be combined with each other without conflict, and the detailed description in the specific implementation should be understood as an explanation and illustration of the purpose of the present application, and should not be regarded as an improper limitation on the present application.
[0028] In the description of the embodiments of the present application, the "upper", "lower", "top", "bottom", orientation or positional relationship is based on the orientation or positional relationship shown in the drawings. It should be understood that these orientation terms are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application.
[0029] In the related art, during the heating process of the microwave oven, the propagation of microwaves in the microwave oven causes the standing wave field to be generated in the microwave oven, and the standing wave field has cold spots and hot spots, which causes uneven heating of food.
[0030] An embodiment of the present application provides a microwave oven, please refer to Figures 1 to 2 , which comprises a main oven 1, a microwave generator 2, a carrier table 3 and a microwave absorber 4. The main oven 1 has a cooking cavity 121 and a microwave receiving hole 122 communicating with the cooking cavity 121. The microwave generator 2 is installed on the main oven 1, and the microwaves generated by the microwave generator 2 enter the cooking cavity 121 through the microwave receiving hole 122. The carrier table 3 is located in the cooking cavity 121. The microwave absorber 4 is installed on the carrier table 3, and the microwave absorber 4 is used to absorb microwaves in the cooking cavity 121 and convert them into heat energy.
[0031] In the embodiment of the present application, the microwave absorber 4 is installed on the carrier table 3, which is used to absorb microwaves in the cooking cavity 121 and convert them into heat energy, which can reduce the reflection of microwaves in the microwave oven, improve the energy near the food on the carrier table 3, weaken the standing wave field of microwaves, and thus make the heating of the microwave oven more uniform. The microwave absorber 4 can also reduce the reflection of energy back to the microwave generator 2, which not only improves the energy efficiency of the microwave oven, but also improves the safety of the microwave oven.
[0032] In an embodiment, please refer to Figures 1 to 2 , the material of the carrier table 3 is an insulating material, and the material of the microwave absorber 4 can conduct electricity. The microwave absorber 4 comprises at least two patch groups, each patch group comprises at least two conductive patches 41, the at least two conductive patches 41 are arranged at intervals, and the resonant frequency of the microwave absorber 4 is within the frequency range of the microwaves generated by the microwave generator 2.
[0033] It should be explained that the microwave absorber 4 is composed of a plurality of conductive patches 41, and the conductive patches 41 and the insulating carrier table 3 jointly form a patch type frequency selective surface. The patch type frequency selective surface has high impedance, and functions as a spatial band-stop filter. When the microwave is conducted to the high impedance surface, the high impedance surface forms a strong current for heating, reduces the reflection of the microwave, weakens the standing wave field of the microwave, forms a surface wave near the frequency selective surface, and improves the electromagnetic field energy.
[0034] In the embodiment, the conductive patches 41 are arranged on the carrier table 3, and the resonant frequency of the conductive patches 41 is in the microwave frequency range of the microwave generator 2. In this way, more energy can be consumed as much as possible, the reflection of the microwave is reduced, the energy transmission efficiency is improved, and the uniformity of the microwave oven heating is improved.
[0035] It can be understood that the specific structure of the microwave absorber 4 is not limited. For example, the material of the microwave absorber 4 can also be an artificial magnetic conductor material with a microwave absorption function. The microwave absorber 4 does not necessarily form a patch type frequency selective surface.
[0036] In an embodiment, as shown in Figure 2 , at least two conductive patches 41 in each patch group are arranged along a first direction, and at least two patch groups are arranged along a second direction. The first direction and the second direction are arranged in a cross manner.
[0037] It should be explained that the first direction is the direction indicated by the arrow R1 in Figure 2 , and the second direction is the direction indicated by the arrow R2 in Figure 2 .
[0038] In the embodiment, the conductive patches 41 are arranged along the first direction and the second direction, and the first direction and the second direction are arranged in a cross manner. In this way, the conductive patches 41 can be orderly arranged on the carrier table 3, the arrangement manner is relatively simple, and the conductive patches 41 can be arranged on the carrier table 3 relatively conveniently.
[0039] For example, the conductive patches 41 can also be arranged in a plurality of annular shapes from inside to outside.
[0040] For example, the conductive patches 41 can also be arranged in a special shape.
[0041] In an embodiment, as shown in Figure 2 , the gap between the adjacent two conductive patches 41 ranges from 3 mm to 5 mm.
[0042] For example, as shown in Figure 2 , the gap between the adjacent two conductive patches 41 is D1, and 3 mm≤D1≤5 mm.
[0043] Exemplarily, the gap between two adjacent conductive patches 41 can be 3mm, 3.5mm, 4.5mm or 5mm.
[0044] Exemplarily, referring to Figure 2 , the gap includes the gap between two adjacent conductive patches 41 in the first direction and the gap between two adjacent conductive patches 41 in the second direction.
[0045] In the embodiment of the present application, there is a gap between two adjacent conductive patches 41, and the resonant frequency of the frequency selective surface corresponding to the gap with different distances is different. Such a setting can make the resonant frequency of the conductive patch 41 correspond to the microwave frequency generated by the microwave oven, and generate as much energy consumption as possible.
[0046] It can be understood that the gap between two adjacent conductive patches 41 is not limited to the above range. Exemplarily, the gap between two adjacent conductive patches 41 can also be 2mm.
[0047] In an embodiment, referring to Figure 2 , the shape of the conductive patch 41 is a square, and the length of the side of the conductive patch 41 ranges from 10mm to 12mm.
[0048] Exemplarily, referring to Figure 2 , the length of the side of the conductive patch 41 is D2, and 10mm≤D2≤12mm.
[0049] Exemplarily, the length of the side of the conductive patch 41 can be 10mm, 10.5mm, 11.5mm or 12mm.
[0050] In the embodiment of the present application, the conductive patch 41 adopts a square shape with a small side length. Such a setting can make the resonant frequency corresponding to the microwave absorber 4 be within the microwave frequency range of most microwave ovens, which is conducive to the microwave absorber 4 to better absorb microwaves.
[0051] It can be understood that the shape of the conductive patch 41 is not limited. Exemplarily, the shape of the conductive patch 41 can also be a rhombus.
[0052] In an embodiment, referring to Figure 2 , the resonant frequency corresponding to the microwave absorber 4 ranges from 2.26Hz to 2.79Hz.
[0053] Exemplarily, the resonant frequency corresponding to the microwave absorber 4 can be 2.26Hz, 2.40Hz, 2.50Hz or 2.79Hz.
[0054] In the embodiment of the present application, the frequency of the microwaves generated by the microwave generator 2 in the microwave oven is approximately in the range of 2.26Hz-2.79Hz, and the resonant frequency of the microwave absorber 4 is set in the range of 2.26Hz-2.79Hz, so that the resonant frequency of the microwave absorber 4 is substantially in the range of the microwave frequency of the microwave generator 2, which can consume more energy as much as possible, reduce the reflection of microwaves, improve the energy transmission efficiency, and improve the uniformity of the heating of the microwave oven.
[0055] It can be understood that the resonant frequency of the microwave absorber 4 is not limited to the above range, and for example, the resonant frequency of the microwave absorber 4 can also be 2.10Hz.
[0056] In an embodiment, referring to Figure 3 , the carrying area 31 for carrying food is arranged on the carrier table 3, and the conductive patch 41 is arranged outside the carrying area 31. The carrying area 31 is provided with the conductive patch 41 on the opposite sides along the first direction, and the carrying area 31 is provided with the conductive patch 41 on the opposite sides along the second direction.
[0057] In the embodiment of the present application, the conductive patch 41 is arranged outside the carrying area 31, so that the microwaves can be smoothly transmitted from the microwave generator 2 to the carrying area 31 and the cooking cavity 121 for heating the food.
[0058] It can be understood that the positional relationship between the carrying area 31 and the conductive patch 41 is not limited to the above case, and for example, the conductive patch 41 can be arranged only on the opposite sides of the carrying area 31 along the first direction.
[0059] In an embodiment, referring to Figure 2 , the area of the carrying area 31 is greater than the area of the conductive patch 41.
[0060] In the embodiment of the present application, the area of the carrying area 31 is greater than the area of the conductive patch 41, so that the carrying area 31 has sufficient space for the propagation of microwaves, and the conductive patch 41 reduces the obstruction of the microwave receiving hole 122 to the received microwaves.
[0061] It can be understood that the areas of the carrying area 31 and the conductive patch 41 are not limited to the above case, and the area of the carrying area 31 can be equal to the area of the conductive patch.
[0062] In an embodiment, the frequency of the microwaves generated by the microwave generator 2 is the same as the resonant frequency of the microwave absorber 4.
[0063] It should be explained that, referring to Figure 2 , the horizontal coordinate represents the microwave frequency, and the unit is Hz (Hertz), and the vertical coordinate represents the reflection phase, and the unit is ° (degree).
[0064] Exemplarily, please refer to Figure 3 When the conductive patch 41 is square, the side length is 10 mm, the interval between every two conductive patches 41 is 5 mm, and the conductive patches 41 are arranged in a matrix perpendicular to the first direction and the second direction, the resonant frequency of the microwave absorber 4 is 2.5292 Hz.
[0065] In the embodiment, the microwave frequency generated by the microwave generator 2 is the same as the resonant frequency of the microwave absorber 4, so that the current generated in the conductive patch 41 can reach the maximum value, the microwave energy can be converted into heat energy as much as possible, the energy loss can be reduced, and the energy efficiency of the microwave oven can be improved, so that the heating rate and the heating efficiency of the microwave oven can be greatly improved.
[0066] In an embodiment, the material of the conductive patch 41 is graphene or artificial magnetic conductor.
[0067] In the embodiment, the material of the conductive patch 41 is graphene or artificial magnetic conductor, so that the phase of the reflected wave and the microwave can be the same, thereby reducing the standing wave, reducing the reflection loss, and improving the efficiency of the microwave oven.
[0068] It can be understood that the material of the conductive patch 41 is not limited. Exemplarily, the material of the conductive patch 41 can be metal.
[0069] In an embodiment, please refer to Figures 2 to 3 Figures 1 to 2 The main oven 1 includes an oven body 11 and a metal container 12. The metal container 12 is installed in the oven body 11, the microwave generator 2 is located between the metal container 12 and the oven body 11, and the cooking cavity 121 and the receiving hole 122 are formed in the metal container 12.
[0070] In the embodiment, the metal container 12 is installed in the oven body 11, so that the microwave leakage to the outside of the microwave oven can be reduced, the microwave can only be reflected in the metal container 12, and the microwave can be uniformly distributed in the cooking cavity as much as possible. This arrangement can effectively utilize the microwave energy, reduce the energy waste, and improve the heating efficiency of the microwave oven.
[0071] It can be understood that the main oven 1 is not limited to the above-mentioned structure, and exemplarily, the main oven 1 can only include the oven body 11 or only include the metal container 12.
[0072] In the description of the application, the description of the terms "in an embodiment", "in some embodiments", "in other embodiments", "in yet other embodiments", or "exemplary" etc. means that the particular feature, structure, material or characteristic being described is included in at least one embodiment or example of the application. The illustrative appearances of the above-mentioned terms in various places in the specification are not necessarily referring to the same embodiment or example. Moreover, the particular features, structures, materials, or characteristics can be combined in any suitable manner in one or more embodiments or examples. Furthermore, the application can be implemented in any suitable combination of hardware and / or software for any real or theoretical computer system dependent on the particular needs and requirements of the application being implemented. Moreover, the different embodiments or examples of the application can be combined with each other and / or combined with the features of the different embodiments or examples without departing from the scope of the application.
[0073] The above description is merely illustrative of the application, and is not intended to limit the application. The application can be modified and varied in various ways without departing from the spirit and scope of the application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the application shall be included in the scope of the application.
Claims
1. A microwave oven, characterized in that, include: The main oven has a cooking cavity and a microwave receiving port communicating with the cooking cavity; A microwave generator is installed in the main oven, and the microwaves generated by the microwave generator enter the cooking cavity through the microwave receiving port. The platform is located inside the cooking cavity; A microwave absorber is installed on the stage and is used to absorb microwaves in the cooking cavity and convert them into heat energy.
2. The microwave oven according to claim 1, characterized in that, The stage is made of insulating material, the microwave absorber is made of conductive material, the microwave absorber includes at least two patch groups, each patch group includes at least two conductive patches, the at least two conductive patches are arranged at intervals, and the resonant frequency of the microwave absorber is within the frequency range of the microwaves generated by the microwave generator.
3. The microwave oven according to claim 2, characterized in that, At least two of the conductive patches in each patch group are arranged along a first direction, and at least two patch groups are arranged along a second direction, with the first direction and the second direction being arranged alternately.
4. The microwave oven according to claim 3, characterized in that, The gap between two adjacent conductive patches is in the range of 3mm to 5mm.
5. The microwave oven according to claim 4, characterized in that, The conductive patch is square in shape, and the side length of the conductive patch ranges from 10mm to 12mm.
6. The microwave oven according to claim 5, characterized in that, The resonant frequency range of the microwave absorber is 2.26Hz to 2.79Hz.
7. The microwave oven according to claim 3, characterized in that, The microwave receiving port is located below the stage, the stage has a carrying area for carrying food, the conductive patch is located outside the carrying area, the conductive patch is provided on both sides of the carrying area along the first direction, and the conductive patch is provided on both sides of the carrying area along the second direction.
8. The microwave oven according to claim 7, characterized in that, The area of the bearing area is larger than the area of the conductive patch.
9. The microwave oven according to claim 2, characterized in that, The frequency of the microwaves generated by the microwave generator is the same as the resonant frequency of the microwave absorber.
10. The microwave oven according to claim 2, characterized in that, The conductive patch is made of graphene or an artificial magnetic conductor.
11. The microwave oven according to any one of claims 1 to 10, characterized in that, The main furnace includes: Furnace body; A metal container is installed inside the oven body, the microwave generator is located between the metal container and the oven body, and the cooking cavity and the receiving hole are formed in the metal container.