Microwave oven

Abstract

The utility model belongs to the technical field of cooking equipment, and particularly relates to a microwave oven. The utility model provides a microwave oven, and aims to solve the problems of easy microwave leakage and large heat loss of a microwave oven in the prior art. A microwave oven comprises a shell, a cooking cavity is formed in the shell, a shielding plate for shielding microwaves is arranged above the cooking cavity, the shielding plate for shielding the microwaves is arranged above the cooking cavity and detachably connected and fixed in the shell, the shielding plate effectively shields the microwaves, and the risk of microwave leakage is reduced. The heat insulation cover is arranged above the heating assembly, so that heat emitted by the heating assembly is effectively prevented from being conducted upwards, and heat loss is reduced. The through holes with the hexagonal cross sections are formed in the shielding plate, heat emitted by the heating assembly is allowed to enter the cooking cavity through the through holes, meanwhile, the eddy current effect during heat transfer is reduced, the heat can enter the cooking cavity more evenly, and the heating efficiency is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of cooking equipment, and in particular relates to a microwave oven. Background Art

[0002] A microwave oven is a cooking device that can heat food with microwaves and is widely used in the prior art.

[0003] A microwave oven typically consists of an outer shell and a heating element disposed within the outer shell. The outer shell also houses a cooking cavity, where heat from the heating element heats the food within the cooking cavity. However, existing microwave ovens suffer from structural deficiencies, making microwaves that enter the cooking cavity susceptible to leakage. Furthermore, heat within the cooking cavity is easily conducted upward, resulting in significant heat loss within the cooking cavity. Utility Model Content

[0004] The utility model provides a microwave oven, aiming to solve the problems of easy microwave leakage and large heat loss in the microwave oven in the prior art.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is:

[0006] A microwave oven comprises a housing, a cooking cavity is provided in the housing, a shielding plate for shielding microwaves is provided above the cooking cavity, and the shielding plate is fixed to the housing via a detachable connection;

[0007] A heating component is provided above the shielding plate, and a heat insulation cover is provided above the heating component to prevent the heat emitted by the heating component from being conducted upward;

[0008] The shielding plate is provided with a through hole for allowing the heat emitted by the heating component to enter the cooking cavity, and the cross-section of the through hole is hexagonal.

[0009] A further improved solution: the heating component and the heat insulation cover are both arranged in the outer shell.

[0010] Based on the above technical solution, the heating element and heat shield are also located inside the outer shell, which helps reduce direct heat transfer from the outer shell to the outside. The heat shield effectively isolates the heat generated by the heating element, preventing it from being transferred upward to the outer shell, thereby reducing heat loss. At the same time, the heat inside the cooking cavity can be more concentrated on the food, improving heating efficiency and energy utilization. By integrating key components inside the outer shell and optimizing their layout and design, the overall performance of the microwave oven can be significantly improved. Heating is more uniform, food is cooked better, and energy consumption and heat loss are reduced.

[0011] A further improved solution: the shielding plate is fixed in the housing by screws.

[0012] Based on the above technical solution, screw connection is a commonly used fastening method, characterized by stable process and low cost. Securing the shielding plate to the housing with screws ensures that it will not loosen or shift due to vibration or external forces during oven operation. Screw connections are generally strong and durable, capable of withstanding the various stresses and impacts encountered during use, thereby extending the lifespan of the microwave oven. The tightness and sealing of the screw connection have a significant impact on shielding effectiveness. By properly designing the screw specifications, quantity, and layout, the shielding effectiveness of the shielding plate can be further optimized, ensuring that microwave energy is primarily concentrated within the cooking cavity.

[0013] A further improved solution: the shielding plate includes a heat transfer area and a fixing area arranged around the heat transfer area, the through holes are evenly distributed in the heat transfer area, and holes for setting screws are provided in the fixing area.

[0014] Based on this technical solution, the design of the heat transfer zone allows heat to be transferred more directly and evenly into the cooking cavity through the through-holes, reducing heat accumulation and loss on the shielding plate. The even distribution of through-holes ensures uniform heat transfer throughout the heat transfer zone, avoiding localized overheating or uneven cooling. This more even heat transfer results in more consistent heating of food, improving cooking quality.

[0015] A further improved solution: a step structure is provided in the heat transfer zone to improve the strength of the heat transfer zone.

[0016] Based on the above technical solution, the stepped structure increases the shielding plate's strength and rigidity by altering the shape of the heat transfer zone. This design allows the heat transfer zone to better maintain its shape and structural stability despite the heat from the heating element and the pressure of the food in the cooking chamber. The added stepped structure also reduces deformation and warping of the shielding plate during prolonged operation in high-temperature and high-pressure environments. This helps maintain the uniform distribution and dimensional stability of the through-holes, ensuring consistent and even heat transfer to the cooking chamber.

[0017] A further improved solution: a mounting plate is further provided on the shielding plate, and there are two mounting plates, which are respectively provided on opposite sides of the shielding plate, and assembly holes are provided on the mounting plates.

[0018] Based on the above technical solution, dual fixation is achieved by providing mounting plates on both sides of the shielding plate and securing the shielding plate to the housing using screws or other fasteners inserted through the mounting holes. This design significantly enhances the stability and securement of the shielding plate's installation, ensuring it remains in place even under prolonged use or high pressure. This dual fixation design distributes stress more evenly between the shielding plate and the housing, preventing deformation or damage caused by stress concentration, and helping to extend the overall service life of the shielding plate and microwave oven. The mounting holes on the mounting plates provide a clear positioning reference during the installation process, allowing the shielding plate to be installed on the housing more quickly and accurately, reducing installation difficulty and cost, and improving production efficiency.

[0019] A further improved solution: the mounting plate extends in a direction close to the heating component.

[0020] Based on the above technical solution, the mounting plate extends toward the heating element, further reducing the possibility of microwave leakage through gaps or joints. This helps improve the safety of the microwave oven and reduces potential harm to users. By enhancing the microwave shielding effect, it ensures that microwave energy is primarily concentrated within the cooking cavity. This helps improve microwave utilization, reducing energy consumption and cooking time. Extending the mounting plate toward the heating element provides more effective support for the shielding plate, which helps enhance the overall structural stability of the microwave oven and reduces loosening or damage caused by vibration or external forces. By improving structural stability and durability, the microwave oven's service life can be extended.

[0021] A further improved solution: the heat insulation cover includes a cover body and a mounting ring provided on the cover body, and a heating cavity for accommodating the heating component is formed between the cover body and the shielding plate.

[0022] Based on this technical solution, the heat shield's design effectively blocks heat generated by the heating element from dissipating into the external environment. By forming a heating cavity, heat is more concentrated on the food within the cooking chamber, improving heating efficiency. The shield's design also prevents the heating element from overheating due to prolonged operation, reducing safety risks such as fire.

[0023] Further improved solution: a mounting hole is provided on the mounting ring.

[0024] Based on this technical solution, the mounting holes provide positioning points for the heat shield, making installation more intuitive and simple. Users or maintenance personnel can securely attach the heat shield to the housing or other supporting structure by inserting fasteners through the mounting holes. The mounting holes help ensure the heat shield's position during installation. Precisely aligning the mounting holes and tightening them prevents the heat shield from shifting or loosening during installation.

[0025] Further improved solution: the cover body and the mounting ring are an integrated structure.

[0026] Based on this technical solution, the integrated structure reduces the number of connection points between the cover and the mounting ring, thereby reducing the risk of structural instability caused by loose or damaged connections. This design makes the entire heat shield a more solid unit, capable of withstanding greater external forces and pressures.

[0027] The beneficial effects of the utility model are:

[0028] The utility model provides a shielding plate for shielding microwaves above the cooking cavity and fixes it to the housing via a detachable connection. This design is not only easy to install and disassemble, but also convenient for users to clean and maintain. More importantly, the shielding plate effectively shields microwaves, reduces the risk of microwave leakage, and improves safety of use. A heat shield is provided above the heating component to effectively prevent the heat emitted by the heating component from being conducted upward, reducing heat loss. This not only improves energy efficiency, but also avoids safety hazards caused by overheating on the outside of the oven. Through holes with hexagonal cross-sections are provided on the shielding plate. These through holes allow the heat emitted by the heating component to enter the cooking cavity, while reducing the eddy current effect during heat transfer, so that the heat enters the cooking cavity more evenly, improving heating efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For users of ordinary skill in the art, other relevant drawings can be obtained based on these drawings without any creative work.

[0030] Figure 1 The utility model is a schematic diagram of the internal structure of a microwave oven.

[0031] Figure 2 The utility model is a schematic diagram of a shielding plate in a microwave oven.

[0032] Figure 3 The utility model is a schematic diagram of a heat insulation cover in a microwave oven.

[0033] Figure 4 The utility model is a schematic diagram of a microwave oven.

[0034] Description of the numbers in the figure:

[0035] 1-housing; 2-cooking cavity; 3-shielding plate; 31-through hole; 32-heat transfer area; 33-fixing area; 34-step structure; 35-mounting plate; 36-assembly hole; 4-heating component; 5-heating shield; 51-hood; 52-mounting ring; 53-heating cavity; 54-mounting hole. DETAILED DESCRIPTION

[0036] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. Based on the embodiments of the present invention, all other embodiments obtained by users of the present invention without creative work are within the scope of protection of the present invention.

[0037] refer to Figures 1 to 4 A microwave oven comprises a housing 1, a cooking cavity 2 is provided in the housing 1, a shielding plate 3 for shielding microwaves is provided above the cooking cavity 2, and the shielding plate 3 is fixed in the housing 1 by a detachable connection;

[0038] A heating component 4 is provided above the shielding plate 3 , and a heat shield 5 is provided above the heating component 4 to prevent the heat emitted by the heating component 4 from being conducted upwards;

[0039] The shielding plate 3 is provided with a through hole 31 for allowing the heat emitted by the heating component 4 to enter the cooking cavity 2 , and the cross-section of the through hole 31 is hexagonal.

[0040] Specifically, a heating chamber 53 can be formed between the heat shield 5 and the shielding plate 3 to accommodate the heating element 4. The heating element 4 can be an electric heating tube or an electric heating element. A fan is also provided in the heating chamber 53 to transfer heat from the heating chamber 53 to the cooking chamber 2 through the through hole 31.

[0041] Specifically, the cooking cavity 2, the heating component 4, the shielding plate 3, and the heat shield 5 are all disposed within the housing 1. The housing 1 is provided with the cooking cavity 2, the shielding plate 3, the heating component 4, and the heat shield 5 in this order from bottom to top. The heating component 4 can be secured to the housing 1 via screws. The heating component 4 can also be secured to the housing 1 via the heat shield 5 or the shielding plate 3. For example, the heating component 4 can be secured to the shielding cover, which in turn is secured to the housing 1.

[0042] refer to Figures 1 to 4Specifically, the shielding plate 3 is fixed to the housing 1 by screws. A mounting beam or mounting block for mounting the screws may be provided within the housing 1, and the mounting beam or mounting block may be provided with screw holes that mate with the screws. The shielding plate 3 may be provided with through holes 31 for the screws to pass through. The screws pass through through holes 31 and mate with the screw holes, securing the shielding plate 3 to the mounting beam or mounting block.

[0043] Specifically, the shielding plate 3 includes a heat transfer area 32 and a fixing area 33 disposed around the heat transfer area 32. The through holes 31 are evenly distributed within the heat transfer area 32, and the fixing area 33 is provided with holes for mounting screws. The cross-sectional shape of the through holes may also be other shapes, such as circular, pentagonal, heptagonal, or octagonal.

[0044] Specifically, the heat transfer zone 32 is provided with a stepped structure 34 to enhance the strength of the heat transfer zone 32. The stepped structure 34 is formed by a portion of the shielding plate 3 located in the heat transfer zone 32 that is convex or concave to one side. There can be one or more stepped structures 34. The stepped structure 34 effectively enhances the strength of the shielding plate 3 and prevents deformation. For example, there may be two, three, or four stepped structures 34, and so on.

[0045] Specifically, the shielding plate 3 is also provided with two mounting plates 35, one on each opposite side of the shielding plate 3. Each mounting plate 35 is provided with mounting holes 36. The mounting plates 35 extend toward the heating assembly 4. The mounting plates 35 and the shielding plate 3 are integrally formed. The extension of the mounting plates 35 toward the heating assembly 4 prevents interference between the mounting plates 35 and the cooking chamber 2, thereby making the cooking chamber 2 easier to remove and clean. Four mounting plates 35 may also be provided. When the shielding plate 3 is rectangular and there are four mounting plates 35, each side of the shielding plate 3 corresponds to a mounting plate 35.

[0046] The heat shield 5 includes a housing 51 and a mounting ring 52 disposed on the housing 51. A heating chamber 53 for accommodating the heating assembly 4 is formed between the housing 51 and the shielding plate 3. The mounting ring 52 is provided with mounting holes 54. The fan blades are located within the heating chamber 53 and above the heating assembly 4, directing heat generated by the heating assembly 4 toward the cooking chamber 2. The mounting holes 54 are used to secure the heat shield 5 to the mounting plate 35 or mounting beam. For example, screws can be inserted through the mounting holes 54 and the holes in the shielding plate 3 and then engage with screw holes in the mounting block or mounting beam. The housing 51 and mounting ring 52 are integrally formed. The housing 51 can be truncated conical, smaller at the top and larger at the bottom. Alternatively, the housing 51 can be cylindrical. The top wall of the housing 51 is provided with an axial hole for the motor output shaft.

[0047] The working principle of this embodiment is as follows:

[0048] When the microwave oven is turned on, heating assembly 4 begins operating and generates heat. Simultaneously, the fan installed within heating cavity 53 also begins operating, blowing the heat generated by heating assembly 4 into cooking cavity 2 through through-hole 31. This heat then enters cooking cavity 2 through through-hole 31 in shielding plate 3, heating and cooking the food placed within. Shielding plate 3 effectively prevents microwave leakage, ensuring safe use.

[0049] The heat shield 5 prevents the heat emitted by the heating element 4 from being conducted upward to the external environment, thereby improving energy efficiency and protecting the external environment from high temperatures. In other words, the heat shield 5 allows more heat emitted by the heating element 4 to be blown toward the cooking cavity 2, thereby improving cooking efficiency.

[0050] The present invention is not limited to the above optional implementation methods. Under the premise of not conflicting with each other, the various solutions can be combined arbitrarily. Anyone can derive other forms of products under the inspiration of the present invention. However, no matter what changes are made in their shape or structure, all technical solutions that fall within the scope defined by the claims of the present invention fall within the scope of protection of the present invention.

Claims

1. A microwave oven, characterized in that: The cooking chamber comprises a housing, wherein the housing has a cooking cavity, a shielding plate for shielding microwaves is provided above the cooking cavity, and the shielding plate is fixed to the housing via a detachable connection; A heating component is provided above the shielding plate, and a heat insulation cover is provided above the heating component to prevent the heat emitted by the heating component from being conducted upward; The shielding plate is provided with a through hole for allowing the heat emitted by the heating component to enter the cooking cavity, and the cross-section of the through hole is hexagonal.

2. A microwave oven according to claim 1, characterized in that: The heating component and the heat insulation cover are both arranged in the shell.

3. The microwave oven according to claim 1, wherein: The shielding plate is fixed in the shell by screws.

4. The microwave oven according to claim 1, wherein: The shielding plate comprises a heat transfer area and a fixing area arranged around the heat transfer area. The through holes are evenly distributed in the heat transfer area. Holes for setting screws are arranged in the fixing area.

5. A microwave oven according to claim 4, characterized in that: A step structure is provided in the heat transfer zone to improve the strength of the heat transfer zone.

6. The microwave oven according to claim 4, characterized in that: The shielding plate is further provided with a mounting plate. There are two mounting plates, which are respectively provided on opposite sides of the shielding plate. The mounting plates are provided with assembly holes.

7. The microwave oven according to claim 6, characterized in that: The mounting plate extends in a direction close to the heating component.

8. The microwave oven according to claim 1, characterized in that: The heat insulation cover comprises a cover body and a mounting ring arranged on the cover body, and a heating cavity for accommodating the heating component is formed between the cover body and the shielding plate.

9. The microwave oven according to claim 8, characterized in that: The mounting ring is provided with a mounting hole.

10. The microwave oven according to claim 9, characterized in that: The cover body and the mounting ring are an integrated structure.

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