Microwave oven
By installing a metal shield outside the graphene heating tube in the microwave oven, the problem of microwave leakage is solved, the safety of the equipment is improved and the heating tube is protected.
Patent Information
- Application Number
- CN202420451515.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-08
- Publication Date
- 2025-02-11
- Estimated Expiration
- 2034-03-08
AI Technical Summary
Graphene heating tube causes microwave leakage in microwave ovens, posing safety risks.
A metal shield is provided outside the graphene heating tube, so that microwaves cannot be leaked to the outside of the cavity by blocking.
It effectively improves the safety of equipment use, prevents microwave leakage, and protects the graphene heating tube from collision damage.
Smart Images
Figure CN222464865U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of household appliances, in particular to a microwave oven. Background Art
[0002] Currently, graphene heating tubes are mainly used inside ovens. Because graphene heating tubes have high surface temperature and penetration ability, they are applied to oven products in most scenarios.
[0003] Graphene heating tubes are rarely used in microwave ovens because microwaves can pass through the graphene heating tubes and leak from the ceramic head of the graphene heating tubes to the outside of the cavity, causing the external microwave leakage value to exceed the standard and cause safety accidents. Therefore, it is currently impossible to solve the microwave leakage problem caused by the application of graphene heating tubes in microwave oven environments. Utility Model Content
[0004] Based on the technical problem of microwave leakage caused by the application of graphene heating tubes in microwave ovens in the prior art, the utility model provides a microwave oven, in which a metal shielding member is arranged outside the graphene heating tube for shielding, so that the microwave cannot leak from the inside of the graphene heating tube to the outside of the cavity, thereby improving the safety of equipment use.
[0005] The utility model provides a microwave oven, comprising:
[0006] An inner pot having a cooking cavity;
[0007] A microwave generating device, disposed on the inner pot, for emitting microwaves into the cooking cavity;
[0008] A graphene heating tube, located in the cooking cavity, with two ends thereof fixed to the inner pot;
[0009] The metal shielding member is a tubular structure, surrounding the outside of the graphene heating tube, and the two ends of the metal shielding member are fixedly connected to the inner tank;
[0010] The ratio of the outer diameter of the graphene heating tube to the inner diameter of the metal shielding component is in the range of 0.5-0.8.
[0011] In some embodiments, the outer diameter of the graphene heating tube is 10-15 mm.
[0012] In some embodiments, the inner diameter of the metal shield is in the range of 15-20 mm.
[0013] In some embodiments, the graphene heating tube includes an outer tube, an inner tube and connectors at both ends that are mutually nested; the inner tube is coated with graphene material.
[0014] In some embodiments, the metal shielding member includes a tube body having a plurality of through holes formed therein.
[0015] In some embodiments, the diameter of the through hole d≤5 mm.
[0016] In some embodiments, the distance D between two adjacent through holes is ≥ d+2 mm.
[0017] In some embodiments, the metal shield is fixed to the inner shell by welding.
[0018] In some embodiments, a first mounting hole is opened on the inner tank, and the two ends of the graphene heating tube pass through the first mounting hole. The first mounting hole has a flange, and the two ends of the metal shielding part are welded and fixed to the flange; a fixing part is fixed on the outer side of the inner tank for fixedly connecting with the two ends of the graphene heating tube.
[0019] In some embodiments, a second mounting hole is provided on the fixing member, the second mounting hole is an arcuate hole, and both ends of the graphene heating tube pass through the second mounting hole to be fixedly connected to the fixing member.
[0020] Compared with the prior art, the advantages and positive effects of the utility model are:
[0021] The above-mentioned microwave oven, by arranging a metal shielding part outside the graphene heating tube to shield it, prevents microwaves from leaking from the inside of the graphene heating tube to the outside of the cavity, thereby improving the safety of equipment use; at the same time, the metal shielding part is arranged on the outside of the graphene heating tube to play a protective role and prevent the graphene heating tube from being damaged by collision; by setting a reasonable diameter ratio between the graphene heating tube and the metal shielding part, it can be ensured that the graphene heating tube and the metal shielding part have a stable structure and excellent performance on the basis of taking into account the feasibility of the production process and the optimization of thermal efficiency, and can operate reliably for a long time. BRIEF DESCRIPTION OF THE DRAWINGS
[0022] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.
[0023] Figure 1 This is a schematic diagram of the internal structure of the microwave oven of the utility model;
[0024] Figure 2 for Figure 1 Exploded diagram of
[0025] Figure 3It is a partial structural diagram of a metal shielding member in a microwave oven of the utility model;
[0026] Figure 4 It is a cross-sectional view of a metal shielding member and a graphene heating tube in a microwave oven of the utility model;
[0027] Figure 5 It is a partial exploded diagram of the microwave oven of the utility model;
[0028] Figure 6 for Figure 5 A local enlarged view of location I in FIG.
[0029] Figure 7 This is a schematic diagram of the structure of the fixing parts in the microwave oven of the utility model;
[0030] Description of reference numerals:
[0031] Inner liner 100; mounting position 110; first mounting hole 120; flange 121;
[0032] Graphene heating tube 200; outer tube 210; inner tube 220;
[0033] Metal shield 300; tube body 310; through hole 320;
[0034] Fixing member 400; second mounting hole 410. DETAILED DESCRIPTION
[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0036] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.
[0037] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances. In the description of the above embodiments, specific features, structures, materials or characteristics can be combined in any one or more embodiments or examples in a suitable manner.
[0038] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. In the description of the present utility model, unless otherwise specified, "plurality" means two or more.
[0039] Reference Figure 1-Figure 7 , is an embodiment of the microwave oven of the utility model.
[0040] The microwave oven includes an inner pot 100 , a microwave generating device arranged on the inner pot 100 , a graphene heating tube 200 and a metal shielding member 300 .
[0041] The inner pot 100 has a cooking cavity.
[0042] The microwave generator is disposed on the top of the inner pot 100 for emitting microwaves into the cooking cavity. A mounting position 110 is disposed on the top of the inner pot 100 , and the microwave generator is mounted on the mounting position 110 .
[0043] The graphene heating tube 200 is located in the cooking cavity, and can be located above or to the side of the cooking cavity, for emitting radiant heat into the cooking cavity. Both ends of the graphene heating tube 200 are fixed to the inner pot 100. One or more graphene heating tubes 200 can be configured.
[0044] The metal shielding member 300 is a tubular structure, surrounding the outside of the graphene heating tube 200, and being spaced apart from the graphene heating tube 200. The metal shielding member 300 is used to block microwaves, preventing microwaves from entering the graphene heating tube 200 and leaking out of the cavity through the graphene heating tube 200.
[0045] The two ends of the metal shielding member 300 are fixedly connected to the inner container 100. That is, the metal shielding member 300 completely surrounds the portion of the graphene heating tube 200 located in the inner container 100, ensuring that the graphene heating tube 200 will not be interfered by microwaves.
[0046] In this embodiment, Figure 4The graphene heating tube 200 includes an outer tube 210 and an inner tube 220 which are mutually sleeved, and connectors at both ends. The outer tube 210 and the inner tube 220 are both quartz tubes, and the inner tube 220 is coated with graphene material. The connector is a ceramic head, and a connecting terminal is arranged inside the ceramic head.
[0047] The ratio of the outer diameter of the graphene heating tube 200 to the inner diameter of the metal shielding member 300 is in the range of 0.5-0.8, preferably, the ratio is in the range of 0.7-0.8.
[0048] If the ratio is less than 0.5, the outer diameter of the graphene heating tube 200 will be reduced or the inner diameter of the metal shield 300 will be increased; when the outer diameter of the graphene heating tube 200 is reduced, the inner tube diameter will also be reduced, so it is difficult to ensure the accuracy when the graphene material is coated on the inner tube surface; in addition, the smaller the inner tube diameter, the smaller the graphene surface area, and the reduced light-emitting area in the future, which cannot meet the high temperature requirements (such as 650°C) required under high power conditions (such as 700W). When the inner diameter of the metal shield 300 is too large, it will occupy too much internal volume, so the ratio is not less than 0.5.
[0049] If the ratio is greater than 0.8, the outer diameter of the graphene heating tube 200 will increase or the inner diameter of the metal shielding 300 will decrease; when the outer diameter of the graphene heating tube 200 increases, the gap between the outer diameter and the inner diameter of the graphene heating tube 200 will be too large, and the straightness of the two tube packaging will be difficult to control, while increasing the cost of the outer tube material. In addition, since the gap between the inner tube and the outer tube of the graphene heating tube 200 increases, the heat radiation rate will also be reduced; in addition, the larger the ratio, the smaller the gap between the graphene heating tube 200 and the metal shielding 300, which is not only easy to cause collisions between the metal shielding 300 and the graphene heating tube 200 during transportation, but also the heat generated by the graphene heating tube 200 during operation is transferred to the metal shielding 300 too quickly, which may cause local overheating, blackening and deformation of the metal material, shortening the service life, so the ratio is not greater than 0.8.
[0050] The above-mentioned microwave oven, by arranging a metal shielding part outside the graphene heating tube for shielding, prevents microwaves from leaking from the inside of the graphene heating tube to the outside of the cavity, thereby improving the safety of equipment use; at the same time, the metal shielding part is arranged on the outside of the graphene heating tube to play a protective role and prevent the graphene heating tube from being damaged by bumps; by setting a reasonable diameter ratio between the graphene heating tube and the metal shielding part, it can be ensured that the graphene heating tube and the metal shielding part have a stable structure and excellent performance on the basis of taking into account the feasibility of the production process and the optimization of thermal efficiency, and can operate reliably for a long time.
[0051] In this embodiment, the outer diameter of the graphene heating tube 200 is 10-15 mm, preferably 13 mm. The appropriate outer diameter of the graphene heating tube 200 can ensure that the inner and outer tube structures of the graphene heating tube 200 are easy to manufacture and assemble. The moderate outer diameter allows the tooling equipment to operate accurately when the graphene material is coated on the surface of the inner tube, ensuring that the coating is uniform and the thickness is controllable; at the same time, it can avoid the reduction of the graphene surface area caused by too small an inner diameter, so as to meet the high temperature requirements (such as 650°C) required under high power conditions (such as 700W).
[0052] The inner diameter of the metal shielding member 300 is in the range of 15-20 mm, preferably 18 mm. The appropriate inner diameter of the metal shielding member 300 allows a suitable spacing between the metal shielding member 300 and the graphene heating tube 200, which can reduce the risk of collision during transportation, and prevent the heat generated by the graphene heating tube 200 from being transferred to the metal shielding member 300 too quickly during operation, thereby avoiding local overheating, blackening, and deformation of the metal material.
[0053] In this embodiment, see Figure 3 The metal shielding member 300 includes a tube body 310, and a plurality of through holes 320 are formed on the tube body 310. By forming the through holes 320, it is possible to ensure that the heat generated by the graphene heating tube 200 is emitted from the metal shielding member 300 to the maximum extent, and is baked on the food, thereby giving full play to the baking effect of the graphene heating tube 200.
[0054] The through holes 320 are preferably circular holes, and the diameters of the through holes 320 are equal. The diameter d of the through holes 320 is ≤ 5 mm, so as to block microwaves. Preferably, the diameter d of the through holes 320 is 5 mm, which can ensure that microwaves do not pass through, and at the same time, can ensure that heat is dissipated from the metal shielding member 300 to the maximum extent.
[0055] In addition, the distance D between adjacent through holes 320 is ≥ d + 2 mm, that is, the minimum width of the metal shielding member between adjacent through holes is not less than 2 mm to avoid microwave leakage. Preferably, it is 2 mm to ensure the maximum number of through holes and improve the heat dissipation effect.
[0056] The metal shielding member 300 may be made of a metal material such as stainless steel.
[0057] In another embodiment, the metal shielding member 300 may also be a mesh structure. The metal shielding member 300 may be formed by fiber weaving.
[0058] In this embodiment, two ends of the metal shielding member 300 are fixed to the inner shell 100 by welding.
[0059] A first mounting hole 120 is formed on the inner container 100 , and two ends of the graphene heating tube 200 pass through the first mounting hole 120 .
[0060] A fixing member 400 is fixed to the outer side of the inner liner 100, and both ends of the graphene heating tube 200 are fixedly connected to the inner liner 100 through the fixing member 400. Specifically, a second mounting hole 410 is provided on the fixing member 400, and the second mounting hole 410 is arranged opposite to the first mounting hole 120, and the aperture of the second mounting hole 410 is smaller than the first mounting hole 120. Both ends of the graphene heating tube 200 pass through the first mounting hole 120 and the second mounting hole 410, and are limited and fixed by the second mounting hole 410.
[0061] The second mounting hole 410 is a non-circular hole, which can limit the circumferential rotation of the graphene heating tube 200 along its axis. Figure 7 As shown, the second mounting hole 410 is an arcuate hole. Correspondingly, the cross-sections of both ends of the graphene heating tube 200 are arcuate, which match the arcuate hole, so that the graphene heating tube 200 is firmly fixed on the inner tank 100.
[0062] like Figure 5 and Figure 6 As shown, the first mounting hole 120 of the liner 100 has a flange 121 turned outward, and both ends of the metal shielding member 300 pass through the first mounting hole 120 and are fixed to the flange 121 by welding.
[0063] The metal shield 300 and the flange 121 can be welded continuously or in sections. When welding in sections, the length of the weld between the metal shield 300 and the flange 121 can be 5 mm, and the interval between the welds can be 2-3 mm to avoid the microwaves leaking out through the gaps due to the long interval.
[0064] In other embodiments, necked portions may be provided at both ends of the metal shield 300 , and the necked portions and the second mounting holes 410 are fixed by interference fit.
[0065] In this embodiment, the fixing member 400 is a sheet structure, and the graphene heating tube 200 is arranged above the cooking cavity, and is arranged on both sides of the microwave generating device one after the other. The fixing member 400 is an L-shaped sheet, and the upper part of the fixing member 400 can be welded and fixed to the top surface of the inner pot 100 or fixedly connected to the inner pot 100 by screws or the like.
[0066] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the above embodiments, it is still possible for a person skilled in the art to modify the technical solutions described in the above embodiments, or to replace some of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions claimed to be protected by the present invention.
Claims
1. A microwave oven, characterized in that: include: An inner pot having a cooking cavity; A microwave generating device, disposed on the inner pot, for emitting microwaves into the cooking cavity; A graphene heating tube, located in the cooking cavity, with two ends thereof fixed to the inner pot; The metal shielding member is a tubular structure, surrounding the outside of the graphene heating tube, and the two ends of the metal shielding member are fixedly connected to the inner tank; The ratio of the outer diameter of the graphene heating tube to the inner diameter of the metal shielding component is in the range of 0.5-0.
8.
2. The microwave oven according to claim 1, characterized in that: The outer diameter of the graphene heating tube is 10-15 mm.
3. The microwave oven according to claim 1, characterized in that: The inner diameter of the metal shielding member is in the range of 15-20 mm.
4. The microwave oven according to claim 1, characterized in that: The graphene heating tube comprises an outer tube and an inner tube which are sleeved on each other and connectors at both ends; the inner tube is coated with graphene material.
5. The microwave oven according to claim 1, characterized in that: The metal shielding member comprises a tube body, and a plurality of through holes are formed in the tube body.
6. The microwave oven according to claim 5, characterized in that: The diameter of the through hole is d≤5mm.
7. The microwave oven according to claim 6, characterized in that: The distance between two adjacent through holes is D≥d+2mm.
8. The microwave oven according to claim 1, characterized in that: The metal shielding member is fixed to the inner container by welding.
9. The microwave oven according to claim 8, characterized in that: A first mounting hole is provided on the inner liner, and two ends of the graphene heating tube pass through the first mounting hole. The first mounting hole has a flange, and the two ends of the metal shielding member are welded and fixed to the flange; a fixing member is fixed to the outer side surface of the inner liner for fixedly connecting with the two ends of the graphene heating tube.
10. The microwave oven according to claim 9, characterized in that: The fixing member is provided with a second mounting hole, the second mounting hole is an arcuate hole, and two ends of the graphene heating tube pass through the second mounting hole to be fixedly connected to the fixing member.