Cooking equipment
By designing the electrode wire and electrode sheet in the graphene heating tube, the cylindrical section is formed to connect to the end surface of the inner tube, which solves the problem of microwave leakage, realizes effective shielding of microwaves, and improves the safety of the equipment.
Patent Information
- Application Number
- CN202420533813.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-03-19
- Publication Date
- 2024-12-17
- Estimated Expiration
- 2034-03-19
AI Technical Summary
When existing graphene heating pipes run in micro-ovens and other products, the microwave will leak, which poses safety risks.
Design a graphene heating tube structure, in which the electrode wire is spirally wound along the outer surface of the inner tube to form a cylindrical section and is connected to the end surface of the inner tube. The electrode sheet is fixed with the cylindrical section to avoid microwave leakage along the inner tube space. The end face of the electrode wire is located outside the inner liner to prevent microwaves from penetrating through the outer tube.
It effectively blocks microwave leakage and improves the operating safety of the equipment. The microwave leakage volume has been reduced from 6.77 mw/cm2 to 1.81 mw/cm2, meeting safety standards.
Smart Images
Figure CN222192580U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of household appliances, in particular to a cooking device. Background Art
[0002] At present, graphene heating tubes are mainly installed in the upper part of the oven cavity. Graphene heating tubes have higher surface temperature and penetration ability, and their heating speed is faster than other heating tubes, such as metal heating tubes, carbon fiber heating tubes, etc., so they have broad application prospects in oven products.
[0003] At present, the functions of oven products are no longer limited to baking, but are developing towards multi-functions. As a result, microwave ovens, microwave steam-bake-and-fry machines, microwave steam-bake-and-fry machines, etc. have been produced one after another.
[0004] There are three main types of graphene heating tubes on the market. The first type of graphene heating tube is composed of a quartz glass tube and graphene sheets. The graphene sheets pressed into thin sheets are placed in the internal space of the quartz tube; the second type of graphene heating tube is to spray graphene slurry on the inner surface of the quartz glass tube; the third type of graphene heating tube includes a quartz outer tube, a quartz inner tube and an electrode wire. The graphene material is screen-printed on the outer surface of the quartz inner tube and then placed in the quartz outer tube. The electrode wire is wound on both sides of the quartz inner tube to conduct electricity and fix the quartz inner tube.
[0005] In the third type of graphene heating tube, the traditional electrode wire structure is a spring-shaped winding around the inner tube surface, and then a straight line is drawn to connect to the wire. If this type of graphene heating tube is used in products such as micro ovens, when the microwave function is running, microwaves will leak out along the wire from the end face between the outer tube and the inner tube, and at the same time, microwaves will leak out along the outer tube along the installation position of the outer tube and the inner tank, causing safety hazards of microwave leakage. Utility Model Content
[0006] Based on the problem of microwave leakage of graphene heating tubes in cooking devices with microwave function in the prior art, the utility model provides a cooking device, wherein electrode wires and electrode sheets at both ends of the graphene heating tube form a structure that can shield microwaves at the end surface of the inner tube, thereby preventing microwaves from leaking along the internal space of the inner tube, and at the same time, the end surface section is located on the outside of the inner pot, thereby preventing microwaves from penetrating out of the outer tube; it utilizes the structure of the graphene heating tube itself to achieve microwave shielding, thereby improving the operating safety of the equipment.
[0007] The utility model provides a cooking device, comprising:
[0008] An inner pot has a cooking cavity and a mounting hole is provided on the inner pot;
[0009] A microwave generating device, disposed on the inner pot, for emitting microwaves into the cooking cavity;
[0010] A graphene heating tube is located in the cooking cavity, and two ends of the graphene heating tube pass through the mounting holes and are mounted on the inner pot;
[0011] The graphene heating tube comprises an outer tube, an inner tube sleeved in the outer tube, and electrodes located at both ends of the inner tube; a graphene layer is provided on the outer surface of the inner tube; the electrodes comprise an electrode wire and an electrode sheet; the electrode wire is spirally wound along the outer surface of the inner tube to form a cylindrical section, a lead-out section is led outward at the end of the cylindrical section, and the lead-out section extends out of the outer tube; the electrode sheet is directly opposite to the end surface of the inner tube and is fixedly connected to the cylindrical section;
[0012] The cylindrical section of the graphene heating tube is entirely or partially located inside the inner container.
[0013] In some embodiments, the cylindrical section includes an inner spiral section wound around the outer surface of the inner tube and an outer spiral section located outside the end surface of the inner tube; the electrode sheet is fixedly connected to the outer spiral section.
[0014] In some embodiments, the electrode sheet is disposed at an end position of the outer spiral section away from the inner tube.
[0015] In some embodiments, the electrode sheet is embedded between two adjacent turns of electrode wire and is fixed to the electrode wire by welding.
[0016] In some embodiments, the electrode sheet has a plurality of positioning portions at its periphery, the positioning portions abut against the outer surface or the inner surface of the cylindrical section and are fixed by welding to the electrode wire of the cylindrical section.
[0017] In some embodiments, the positioning portion is an L-shaped claw.
[0018] In some embodiments, the inner spiral segment is entirely located inside the inner container; and the outer spiral segment is entirely or partially located outside the inner container.
[0019] In some embodiments, the distance between two adjacent turns of the electrode wire is less than or equal to 5 mm; and the distance between the outer diameter of the electrode wire and the mounting hole is less than or equal to 5 mm.
[0020] In some embodiments, the electrode wire of the outer spiral section is spirally wound to form a cylindrical structure, a truncated cone-shaped cylinder, or a cylindrical structure that is a combination of a cylinder and a truncated cone.
[0021] In some embodiments, the length of the inner spiral segment along the axial direction of the inner tube is in the range of 5-25 mm; the length of the outer spiral segment along the axial direction of the inner tube is in the range of 2-25 mm.
[0022] Compared with the prior art, the advantages and positive effects of the utility model are:
[0023] In the above cooking device, the electrode wires at both ends of the graphene heating tube and the electrode sheets form a structure that can shield microwaves at the end surface of the inner tube, which can prevent the microwaves in the inner pot from leaking to the external environment along the internal space of the inner tube of the graphene heating tube. At the same time, the end surface section of the electrode wire is arranged on the outside of the inner pot, which can prevent the microwaves from penetrating from the outer tube of the graphene heating tube. The graphene heating tube itself structure is used to achieve microwave shielding, thereby improving the operating safety of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS
[0024] 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 paying creative work.
[0025] Figure 1 This is a schematic diagram of the structure of the inner pot and the graphene heating tube in the cooking device of the utility model;
[0026] Figure 2 It is a partial cross-sectional view of the installation position of the inner pot and the graphene heating tube in the cooking device of the utility model;
[0027] Figure 3 This is a schematic diagram of the structure of the graphene heating tube in the cooking device of the utility model;
[0028] Figure 4 This is an exploded view of the graphene heating tube in the cooking device of the utility model;
[0029] Figure 5 This is a cross-sectional view of the end of the graphene heating tube in the cooking device of the utility model;
[0030] Figure 6 It is a schematic diagram of the structure of the electrode sheet in the cooking device of the utility model;
[0031] Description of reference numerals:
[0032] Graphene heating tube 100;
[0033] Outer tube 110;
[0034] Inner tube 120;
[0035] Electrode wire 130; inner spiral section 131; outer spiral section 132; lead-out section 133;
[0036] Electrode sheet 140; Positioning portion 141;
[0037] Inner liner 200; mounting hole 210; flange 220. DETAILED DESCRIPTION
[0038] 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.
[0039] 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.
[0040] 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.
[0041] 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. Example
[0042] Reference Figure 1-Figure 6 , is an embodiment of the cooking device of the utility model. The cooking device can be a microwave oven, ...
[0043] The cooking device includes an inner pot 200 , a microwave generating device arranged on the inner pot 200 , and a graphene heating tube 100 .
[0044] The inner pot 200 has a cooking cavity.
[0045] A microwave generating device (not shown) may be disposed on the top of the inner pot 200 to emit microwaves into the cooking cavity.
[0046] The graphene heating tube 100 is located in the cooking cavity, and can be located above or to the side of the cooking cavity, and is used to emit radiant heat into the cooking cavity. One or more graphene heating tubes 100 can be configured.
[0047] Two mounting holes 210 arranged opposite to each other are provided on the inner liner 200 , and two ends of the graphene heating tube 100 pass through the mounting holes 210 and are fixed on the inner liner 200 .
[0048] See also Figure 2-Figure 6 , which is the specific structure of the graphene heating tube 100 in this embodiment.
[0049] The graphene heating tube 100 includes an outer tube 110 and an inner tube 120 which are sleeved with each other, and electrodes located at both ends of the inner tube.
[0050] The outer tube 110 and the inner tube 120 are both quartz tubes. The inner tube 120 is disposed inside the outer tube 110, and a graphene layer is disposed on the outer surface of the inner tube 120. The graphene material can be screen-printed on the wall of the outer tube 110 of the inner tube 120 to form a graphene layer.
[0051] The electrodes are located inside the outer tube 110 and are respectively arranged on the two ends of the inner tube 120. One end of the electrode is wound around the outer surface of the inner tube 120 and connected to the graphene layer, and the other end is led out of the outer tube 110 to be connected to the wire. The electrode plays a conductive role, transferring current to the graphene material, and also plays a role in fixing the inner tube 120.
[0052] Specifically, the electrode includes an electrode wire 130 and an electrode sheet 140 .
[0053] The electrode wire 130 is spirally wound axially outward along the outer surface of the inner tube 120 to form a cylindrical section, and the end of the cylindrical section is led outward to form a lead section 133, which extends out of the outer tube 110 for wire connection. The electrode sheet 140 is directly opposite to the end surface of the inner tube 120 and is fixedly connected to the cylindrical section. That is, the end of the inner tube 120 is surrounded by the cylindrical section formed by the winding of the electrode wire 130 and the electrode sheet 140.
[0054] In the above-mentioned electrode, the cylindrical section formed by spirally winding the electrode wire 130 can be a cylindrical or truncated cone-shaped cylinder or a cylindrical structure composed of a cylindrical and a truncated cone. The electrode sheet 140 is a flat disc-shaped, or a disc-shaped with a slight convex or concave portion in the middle. The electrode wire of the lead-out section 133 is led outward from the cylindrical section and is generally in a straight line shape.
[0055] Since the electrode wire 130 and the electrode sheet 140 are both made of metal materials, the electrode sheet can shield the end surface of the inner tube 120 from microwaves, thereby preventing microwaves from leaking outward along the inner space of the inner tube 120 .
[0056] At the same time, if Figure 2 As shown, when the graphene heating tube 100 is installed on the inner pot 200, the cylindrical section formed by the electrode wire is completely or partially located inside the inner pot 200. When the cylindrical section is completely located inside the inner pot 200, the distance between the electrode sheet 140 and the inner wall of the inner pot is set within 5 mm. When the cylindrical section is partially located inside the inner pot 200, the electrode sheet 140 is completely located outside the inner pot 200. Since the electrode wire 130, the electrode sheet 140 and the inner pot 200 are all made of metal materials, the installation position of this graphene heating tube 100 can prevent microwaves from penetrating from the outer tube 110 and leaking into the external environment.
[0057] After testing, the original graphene heating tube installed on the micro oven had a microwave leakage of 6.77 mw / cm2 (the test standard requires that the microwave leakage should not exceed 5 mw / cm2). When the graphene heating tube 100 of the present invention was used, the microwave leakage was 1.81 mw / cm2, which was greatly reduced and met the standard requirements.
[0058] In the above-mentioned cooking device, the electrode wires 130 at both ends of the graphene heating tube 100 and the electrode sheet 140 form a structure that can shield microwaves at the end surface of the inner tube 120, which can prevent the microwaves in the inner pot from leaking to the external environment along the internal space of the inner tube 120 of the graphene heating tube 100. At the same time, the electrode sheet 140 is arranged on the outside of the inner pot 200, which can prevent the microwaves from penetrating from the outer tube 110 of the graphene heating tube; it uses the structure of the graphene heating tube 100 itself to achieve microwave shielding, thereby improving the operating safety of the equipment.
[0059] In this embodiment, if Figure 5 As shown, the cylindrical section includes an inner spiral section 131 wound around the outer surface of the inner tube 120 and an outer spiral section 132 located outside the end surface of the inner tube 120. The electrode sheet 140 is fixedly connected to the outer spiral section 132. The inner spiral section 131 is entirely located inside the inner liner 200. The outer spiral section 132 is entirely or partially located outside the inner liner 200.
[0060] The electrode sheet 140 can be disposed at any position of the outer spiral section 132. Preferably, the electrode sheet 140 is disposed at an end position away from the inner tube 120 for easy installation and fixation.
[0061] In this embodiment, the electrode sheet 140 is embedded between two adjacent circles of electrode wires and fixed to the electrode wires by welding. That is, the diameter of the electrode sheet 140 is slightly larger than the outer diameter of the cylindrical section, and the electrode sheet 140 can be inserted between the electrode wires at the two adjacent ends for preliminary fixation, so that the electrode sheet 140 and the electrode wire 130 can be welded and fixed.
[0062] In order to prevent the electrode sheet 140 from being separated from the cylindrical section, as Figure 6 As shown, the electrode sheet 140 has a plurality of positioning portions 141 around it, and the positioning portion 141 is preferably an L-shaped claw, which can abut against the outer surface or inner surface of the cylindrical section to achieve positioning and prevent the electrode sheet 140 from falling off the electrode wire. Finally, the positioning portion 141 can be welded and fixed to the electrode wire of the cylindrical section.
[0063] The electrode wire 130 and the electrode sheet 140 are both made of metal materials, such as tungsten, molybdenum and alloys thereof; platinum, gold, silver palladium, iridium and alloys thereof; copper, etc. The electrode wire 130 and the electrode sheet 140 are preferably made of the same metal material.
[0064] In this embodiment, if Figure 5 As shown, the length L1 of the inner spiral section 131 along the axial direction of the inner tube 120 ranges from 5 to 25 mm, preferably from 5 to 15 mm. If the length is too small, the number of turns of the electrode wire wound on the inner tube 120 will be reduced, and the inner tube 120 will not be effectively fixed; if the length is too large, the electrode wire material will be wasted, increasing the cost.
[0065] The length L2 of the outer spiral section 132 along the axial direction of the inner tube 120 ranges from 2 to 25 mm, preferably from 2 to 15 mm. If the length is too short, the length of the electrode wire outside the inner tube 120 will be short, and when installed on the inner tank 200 of the device, it cannot extend out of the shell of the inner tank 200, causing microwaves to leak from the end of the outer tube 110; if the length is too long, not only will it cause waste of electrode wire materials and increase costs, but it will also increase the length of the outer tube 110 and relatively reduce the length of the inner tube 120, thereby reducing the heating efficiency.
[0066] In other embodiments, the cylindrical sections may be entirely wrapped around the outer surface of the inner tube 120 .
[0067] In this embodiment, the mounting hole 210 of the inner liner 200 has a flange 220 folded outward, which facilitates the installation of the graphene heating tube 100 and avoids damage to the graphene heating tube 100 due to the sharp edge of the hole. It should be pointed out that the portion corresponding to the flange 220 does not belong to the internal space of the inner liner 200, and the electrode sheet 140 can be located in whole or in part in the flange 220.
[0068] In this embodiment, the inner tube 120 and the outer tube 110 are both round tubes. The cylindrical shape formed by winding the electrode wire of the outer spiral section 132 is equal to the diameter of the cylindrical structure formed by winding the inner tube 120 of the inner spiral section 131. The electrode wires of the outer spiral section 132 and the inner spiral section 131 are wound into the same size for easy processing and manufacturing.
[0069] In order to prevent microwaves from leaking out from the inner space of the inner tube 120 along the gaps between each circle of electrode wires, the distance between two adjacent circles of electrode wires should be less than or equal to 5 mm.
[0070] The distance between the outer diameter of the electrode wire 130 and the mounting hole 210 is less than or equal to 5 mm, that is, the distance between the outer surface of the cylindrical section and the mounting hole 210 is less than or equal to 5 mm. The electrode wire 130 and the inner liner 200 are both made of metal materials, and the gap between the two is less than or equal to 5 mm to prevent microwaves from penetrating from the outer tube 110 and leaking into the external environment.
[0071] 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 cooking device, characterized in that: include: An inner pot has a cooking cavity and a mounting hole is provided on the inner pot; A microwave generating device, disposed on the inner pot, for emitting microwaves into the cooking cavity; A graphene heating tube is located in the cooking cavity, and two ends of the graphene heating tube pass through the mounting holes and are mounted on the inner pot; The graphene heating tube comprises an outer tube, an inner tube sleeved in the outer tube, and electrodes located at both ends of the inner tube; a graphene layer is provided on the outer surface of the inner tube; the electrodes comprise an electrode wire and an electrode sheet; the electrode wire is spirally wound along the outer surface of the inner tube to form a cylindrical section, a lead-out section is led outward at the end of the cylindrical section, and the lead-out section extends out of the outer tube; the electrode sheet is directly opposite to the end surface of the inner tube and is fixedly connected to the cylindrical section; The cylindrical section of the graphene heating tube is entirely or partially located inside the inner container.
2. The cooking device according to claim 1, characterized in that: The cylindrical section includes an inner spiral section wound around the outer surface of the inner tube and an outer spiral section located outside the end surface of the inner tube; the electrode sheet is fixedly connected to the outer spiral section.
3. The cooking device according to claim 2, characterized in that: The electrode sheet is arranged at the end position of the outer spiral section away from the inner tube.
4. The cooking device according to claim 2, characterized in that: The electrode sheet is embedded between two adjacent circles of electrode wire and is fixed by welding with the electrode wire.
5. The cooking device according to claim 4, characterized in that: The electrode sheet has a plurality of positioning parts around its periphery, and the positioning parts abut against the outer surface or the inner surface of the cylindrical section and are fixed by welding to the electrode wire of the cylindrical section.
6. The cooking device according to claim 5, characterized in that The positioning portion is an L-shaped claw.
7. The cooking device according to claim 2, characterized in that: The inner spiral section is entirely located inside the inner container; the outer spiral section is entirely or partially located outside the inner container.
8. The cooking device according to claim 1, characterized in that The distance between two adjacent turns of the electrode wire is less than or equal to 5 mm; the distance between the outer diameter of the electrode wire and the mounting hole is less than or equal to 5 mm.
9. The cooking device according to claim 2, characterized in that: The electrode wire of the outer spiral section is spirally wound to form a cylindrical structure, a truncated cone-shaped cylinder, or a cylindrical structure combining a cylinder and a truncated cone.
10. The cooking device according to claim 2, characterized in that The length of the inner spiral section along the axial direction of the inner tube is in the range of 5-25 mm; the length of the outer spiral section along the axial direction of the inner tube is in the range of 2-25 mm.