Microwave leakage prevention heating tube and micro steaming oven thereof

Abstract

The utility model discloses a microwave leakage prevention heating tube and a micro steaming oven thereof. Wherein the heating tube comprises a heating tube body, a heating element is arranged in the heating tube body, and the heating tube body is made of an insulating material; the wiring ends are formed by extending the two ends of the heating tube body; a shielding layer is arranged outside the heating pipe body, and / or a shielding pipe is arranged outside the heating pipe body, so that microwaves are prevented from penetrating through the heating pipe body and leaking from the two ends of the heating pipe body. The shielding layer is arranged outside the heating tube body, and / or the shielding tube is arranged outside the heating tube body, so that when microwaves are emitted to the heating tube body, the shielding layer and / or the shielding tube outside the heating tube body can shield the microwaves, the microwaves are prevented from leaking along the two ends of the heating tube body, and safety is improved; and the microwave loss is reduced, so that the heating efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of kitchen appliances, in particular to a microwave leakage-proof heating tube and a microwave steam oven thereof. Background Art

[0002] A microwave oven is a household appliance that can heat food with microwaves, steam, and bake.

[0003] For example, in a Chinese patent document with publication number CN112369910A, a microwave oven is disclosed, which includes a cooking cavity, a microwave generator, and a main heater assembly, wherein the main heater assembly includes two main heating tubes, which are arranged longitudinally above the cooking cavity in a transversely spaced manner. When the microwave generator of the microwave oven is turned on, microwaves will leak out of the cooking cavity from both ends of the heating tube, causing a safety hazard, and microwave leakage will cause the heating efficiency of food to become low. Utility Model Content

[0004] The utility model aims to provide a microwave leakage-proof heating tube and a microwave steam oven thereof, aiming to solve the above-mentioned problems of insecurity and low heating efficiency.

[0005] In order to achieve the above-mentioned object, according to the first aspect of the present application, the present application provides a microwave leakage-proof heating tube, comprising:

[0006] A heating tube body, in which a heating element is arranged, and the heating tube body is made of insulating material;

[0007] Wiring terminals, which are formed by extending from both ends of the heating tube body;

[0008] A shielding layer is provided outside the heating tube body, and / or a shielding tube is provided outside the heating tube body to prevent microwaves from passing through the heating tube body and then leaking from both ends of the heating tube body.

[0009] Compared with the prior art, the heating tube body of the embodiment of the present application is provided with a shielding layer and / or a shielding tube is provided outside the heating tube body. When microwaves are emitted to the heating tube body, the shielding layer and / or the shielding tube outside the heating tube body can shield the microwaves to prevent the microwaves from leaking along the two ends of the heating tube body, thereby improving safety and improving heating efficiency by reducing microwave losses.

[0010] In some embodiments, the shielding layer is a metal coating coated on the outer surface of the heating pipe body.

[0011] By providing a metal coating, when microwaves are emitted to the metal coating, they encounter metal reflection, which makes it possible for the shielding layer to shield the microwaves.

[0012] In some embodiments, the metal coating is one of silver, tin oxide, gold, or copper.

[0013] By setting the metal coating to one of silver, tin oxide, gold, or copper, the reflection effect of the metal coating is improved, and microwave leakage is further prevented.

[0014] In some embodiments, the heating pipe body is made of quartz material.

[0015] By selecting a heating tube body made of quartz material, the cost of the heating tube body can be reduced.

[0016] In some embodiments, the heating element is a heating wire disposed in the heating tube body, or a graphene conductive layer coated on the inner surface of the heating tube body; the wiring terminal is connected to the heating wire or the graphene conductive layer.

[0017] By providing a heating wire, or coating a graphene conductive layer on the inner surface of the heating tube body, and connecting it to the terminal, it is possible for the heating element to generate heat.

[0018] In some embodiments, the shielding tube includes a shielding cover having a plurality of through holes spaced apart from each other, and a diameter of the through holes is less than or equal to 5 mm.

[0019] The shielding cover body is provided with a plurality of through holes at intervals, and the diameter of the through holes is less than or equal to 5 mm, so that the shielding cover can assist the heating element in dissipating heat through the through holes without affecting the shielding of microwaves, so that the heat can reach the food and heat the food.

[0020] In some embodiments, the shielding tube is made of metal material.

[0021] By setting the shielding tube to be a metal material, when microwaves are emitted to the shielding tube, the microwaves encounter metal reflection, which makes it possible for the shielding tube to shield the microwaves.

[0022] In some embodiments, the shielding tube has a first distance from the heating tube body.

[0023] By setting a first distance between the shielding tube and the heating tube body, the heat generated by the heating tube body can be transmitted through the air between the shielding tube and the heating tube body, thereby avoiding heat accumulation caused by untimely heat dissipation of the shielding tube and avoiding overheating and damage of the heating tube body 11.

[0024] According to a second aspect of the present application, the present application provides a microwave steam oven, which includes the microwave leakage prevention heating tube described in any of the above embodiments; the microwave steam oven also includes: a cooking cavity, a water tank located on the cooking cavity, a steam generator, a microwave generator, and a fan for providing circulating convection air into the cooking cavity.

[0025] In some embodiments, a mounting hole is provided on the cooking cavity, and the heating tube body is passed through the mounting hole;

[0026] The heating tube body is at least partially contained in the cooking cavity, and the connection terminal is located outside the cooking cavity.

[0027] When a shielding tube is provided outside the heating tube body, the shielding tube is at least partially located outside the cooking cavity, and is connected and fixed by welding at the junction of the shielding tube and the mounting hole;

[0028] When a shielding layer is provided outside the heating tube body, the heating tube body is at least partially located outside the cooking cavity, and the heating tube body is connected to the cooking cavity via a fixing member, and the fixing member is connected and fixed to the cooking cavity by welding.

[0029] By providing a mounting hole on the cooking cavity, it is possible to install the heating tube body in the microwave oven. When a shielding tube is provided outside the heating tube body, microwave leakage at the junction of the shielding tube and the mounting hole is avoided by welding the junction of the shielding tube and the mounting hole. When a shielding layer is provided outside the heating tube body, the heating tube body is connected to the cooking cavity through a fixing piece, and the fixing piece is connected and fixed to the cooking cavity by welding, which makes it possible to fix the heating tube in the cooking cavity.

[0030] In order to better understand and implement the present invention, the present invention is described in detail below with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the microwave leakage process of the heating tube;

[0032] Figure 2 is a schematic diagram of the shielding layer of this embodiment to prevent microwave leakage;

[0033] Figure 3 is a schematic diagram of the shielding sleeve of this embodiment for preventing microwave leakage;

[0034] Figure 4 Schematic diagram of the microwave leakage prevention heating tube and the fixing member in this embodiment;

[0035] Figure 5 Yes Figure 4 sectional view of

[0036] Figure 6 is a three-dimensional schematic diagram of a microwave oven in this embodiment;

[0037] Figure 7 is a cross-sectional view of the microwave oven in this embodiment;

[0038] Figure 8 Yes Figure 7 Enlarged view of part A.

[0039] Description of reference numerals:

[0040] 1 microwave leakage prevention heating tube; 11 heating tube body, 12 connection terminal; 13 shielding layer, 14 shielding tube, 141 shielding cover body, 1411 through hole;

[0041] 2 microwave oven, 21 cooking cavity, 211 mounting hole, 212 protective cover, 22 microwave generator, 23 fixing piece, mounting groove 231. DETAILED DESCRIPTION

[0042] In order to better illustrate the present invention, the present invention is further described in detail below with reference to the accompanying drawings.

[0043] It should be clear that the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the embodiments of the present application.

[0044] The terms used in the embodiments of the present application are only for the purpose of describing specific embodiments, and are not intended to limit the embodiments of the present application. The singular forms of "a", "said" and "the" used in the embodiments of the present application and the appended claims are also intended to include plural forms, unless the context clearly indicates other meanings. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0045] When the following description refers to the drawings, unless otherwise indicated, the same numbers in different drawings represent the same or similar elements. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present application. On the contrary, they are merely examples of devices and methods consistent with some aspects of the present application as detailed in the attached claims. In the description of the present application, it should be understood that the terms "first", "second", "third", etc. are only used to distinguish similar objects, and do not have to be used to describe a specific order or sequence, nor can they be understood as indicating or implying relative importance. For those of ordinary skill in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0046] In addition, in the description of this application, unless otherwise specified, "plurality" means two or more. "And / or" describes the association relationship of associated objects, indicating that three relationships may exist. For example, A and / or B can mean: A exists alone, A and B exist at the same time, and B exists alone. The character " / " generally indicates that the associated objects are in an "or" relationship.

[0047] A microwave oven is a kitchen appliance that combines microwave heating, steam heating, and baking heating. A microwave oven can use the above three heating methods at the same time. However, since there are many heating devices in a microwave oven, the heating devices will affect each other when working. For example, the microwave generating device of the microwave heating device will pass through the heat pipe of the baking heating device and leak from the heating pipe.

[0048] Specifically, refer to Figure 1 The schematic diagram shows that the heating tube in the microwave oven has a heating tube body and a terminal. Taking the quartz heating tube as an example, the heating tube body is composed of a metal wire and a quartz layer surrounding the metal wire. The microwaves generated by the microwave generator can penetrate the quartz layer of the heating tube body and reach the metal wire. Then, the microwaves are transmitted from the metal wire to the terminal and emitted to the outside by the terminal. The structure of the heating tube may cause microwave leakage, causing safety hazards and reducing the efficiency of food heating.

[0049] refer to Figure 2 The present application provides a heat pipe, wherein a shielding layer and / or a shielding pipe (reference Figure 3 The microwaves of the microwave oven can be shielded to prevent the microwaves from leaking out of the microwave oven from the heating tube, thereby improving safety. At the same time, since the microwave leakage is reduced, the efficiency of heating food is further improved. Specific embodiments will be provided below for illustration.

[0050] Specifically, Figure 4 As shown, the microwave leakage prevention heating tube 1 includes a heating tube body 11 and a connection terminal 12 .

[0051] The heating element is disposed in the heating tube body 11, and the heating tube body 11 is made of insulating material, such as a metal wire or graphene, and the insulating material of the heating tube body 11 is graphite, glass, ceramic, quartz, etc.

[0052] Preferably, in order to reduce the cost of the device, the heating tube body 11 is made of quartz material.

[0053] Preferably, the heating element is a heating wire disposed in the heating tube body 11 , or a graphene conductive layer coated on the inner surface of the heating tube body 11 ; the terminal 12 is connected to the heating wire or the graphene conductive layer.

[0054] The connection terminal 12 is formed by extending from both ends of the heating tube body 11. For example, the connection terminal 12 has positive and negative electrodes, the positive electrode is one end and the negative electrode is one end, and they are located at both sides of the heating tube body 11 respectively.

[0055] A shielding layer 13 and / or a shielding tube 14 are provided outside the heating tube body 11 to prevent microwaves from passing through the heating tube body 11 and then leaking from both ends of the heating tube body 11. For example, in some embodiments, the shielding layer 13 can be provided alone; in some embodiments, the shielding tube 14 can be provided alone; in other embodiments, the shielding layer 13 and the shielding tube 14 can be combined and provided. Compared with the prior art, the shielding layer 13 and / or the shielding tube 14 can shield microwaves when microwaves are emitted to the heating tube body 11, thereby preventing microwaves from leaking along both ends of the heating tube body 11, improving safety, and improving heating efficiency by reducing microwave losses.

[0056] Preferably, the shielding layer 13 is a metal coating applied to the outer surface of the heating tube body 11. The metal coating 112 may be, for example but not limited to, silver, tin oxide, gold, copper, or other metals and metal compounds, as well as a combination of metals and metals, a combination of metals and metal compounds, or a combination of metal compounds and metal compounds. The metal coating 112 may also be a transparent metal coating to facilitate the thermal radiation inside the heating tube body 111 to penetrate the metal coating 112. The metal layer 112 may be coated by chemical plating or other methods.

[0057] Preferably, the metal coating is one of silver, tin oxide, gold, or copper.

[0058] Preferably, the shielding tube 14 includes a shielding cover 141, on which a plurality of through holes 1411 are spaced apart, and the diameter of the through holes 1411 is less than or equal to 5 mm. For example, the shielding cover 141 is a cylindrical sleeve, on the surface of which a plurality of circular through holes 1411 are continuously distributed. Of course, sleeves or through holes of other shapes are also permitted. Furthermore, the diameter of the through hole 1411 is less than or equal to 5 mm, for example, the diameter of the through hole 1411 is 4 mm, which can reflect most of the microwaves and also achieve a good heat dissipation effect.

[0059] Preferably, the shielding tube 14 of the present application is made of metal material. The metal material can reflect microwaves and further shield microwaves from entering the heating tube body 11. At the same time, the surface of the shielding cover has a plurality of through holes 1411 distributed at intervals, which can assist the heating tube body 11 to dissipate heat into the cooking cavity.

[0060] Preferably, the shielding tube 14 has a first distance to the heating tube body 11. For example, the inner diameter of the shielding tube 14 is larger than the heating tube body 11, so that the inner cavity of the shielding cover 14 can accommodate the heating tube body 11, and the gap remaining after the inner cavity 132 of the shielding tube 14 accommodates the heating tube body 11, i.e., the first distance, has air as a medium in the gap, which further assists the heat dissipation of the heating tube body 11, so that the heat of the heating element can begin to dissipate through the air, improve the heating efficiency, and prevent the heating tube body 11 from being damaged due to overheating.

[0061] like Figure 6 As shown, finally, the present application also provides a microwave steam oven 2.

[0062] like Figure 7 As shown, the microwave oven 2 further includes: a cooking cavity 21 , a water tank located on the cooking cavity 21 , a steam generator, a microwave generator 22 , and a fan for providing circulating convection air into the cooking cavity 21 .

[0063] The cooking cavity 21 is used to place food and provide a space for heating food. For example, the cooking cavity 21 is a closed square metal box (the door of the cooking cavity is not shown in the figure), and the metal cavity can prevent microwaves from leaking from the cooking cavity 21.

[0064] like Figure 8 As shown, preferably, a mounting hole 211 is provided on the cooking cavity 21, and the heating tube body 11 is inserted into the mounting hole 211. The mounting hole 211 and the heating tube body can be interference fit, and when the heating tube body 11 is inserted into the mounting hole 211, it is fixed by snapping. Of course, a replaceable sleeve or bearing can be matched between the heating tube body 11 and the mounting hole 211 to support the heating tube body 11 and to adjust the matching clearance between the heating tube body 11 and the mounting hole 211.

[0065] The water tank is used to provide water to the steam generator, and the steam generator is used to evaporate the water in the water tank to generate steam, and the steam is used to steam-heat the food in the cooking cavity 21.

[0066] The fan is used to provide circulating convection air into the cooking cavity 21 , so that the heat generated by baking heating, microwave heating, and steam heating is more evenly distributed in the cooking cavity 21 .

[0067] The microwave generator 22 is installed in the cooking cavity 21, and the microwave leakage prevention heating tube 1 can be installed on the same side as the microwave generator 22. For example, the microwave generator 22 is located at the top of the cooking cavity 21, and two microwave leakage prevention heating tubes 1 are symmetrically arranged around the two sides of the microwave generator 22. Because the heating tube 1 and the microwave generator 22 are installed on the same side, the microwaves generated by the microwave generator 22 will be emitted to the bottom of the cooking cavity 21, and most of the microwaves are absorbed by the food located at the bottom of the cooking cavity 21, and the remaining microwaves are reflected to the shielding tube 14 or the shielding layer 13 through the inner surface of the cooking cavity 21.

[0068] The heating tube body 11 is at least partially contained in the cooking cavity 21, and the terminal 12 is located outside the cooking cavity 21. Specifically, the heating element of the heating tube body 11 that can generate heat is located in the cooking cavity 21 to generate heat more efficiently. Specifically, the terminal 12 is placed outside the cooking cavity 21, which can not only prevent the high temperature in the cooking cavity 21 from affecting the terminal 12, but also reduce the coating area of ​​the shielding layer 13 or the shielding tube 14, thereby reducing costs. Of course, the outer surface of the cooking cavity 21 can also have a protective cover 212, which is used to accommodate the terminal 12 in the enclosed space formed by the protective cover 22 and the cooking cavity 21 to protect the terminal 12.

[0069] When the shielding tube 14 is provided outside the heating tube body 11, the shielding tube 14 is at least partially located outside the cooking cavity 21, and is connected and fixed by welding at the junction of the shielding tube 14 and the mounting hole 211. For example, a gap may be generated between the shielding tube 14 and the mounting hole 211, and microwaves may leak from the gap. By welding, the shielding tube 14 can be fixed to the cooking cavity 21, and the gap can be filled with solder to prevent microwaves from leaking from the gap.

[0070] When the shielding layer 13 is provided outside the heating tube body 11, the heating tube body 11 is at least partially located outside the cooking cavity 21, and the heating tube body 11 is connected to the cooking cavity 21 through a fixing member 23, and the fixing member 23 is connected and fixed to the cooking cavity 21 by welding. For example, the fixing member 23 is an L-shaped plate, and one end of the fixing member 23 is fixedly connected to the cooking cavity 21 by welding. Of course, the fixing member 23 can also be connected to the cooking cavity 21 by screws; the other end of the fixing member 23 is provided with a mounting groove 231 for placing the heating tube body 11, and the heating tube body 11 can be inserted into the mounting groove 141 and stuck.

[0071] Specifically, taking the microwave oven 2 as an example, the heating tube body 11 thereof is provided with a shielding layer 13 and a shielding tube 14 at the same time, and the working principle of the microwave oven 2 is described as follows:

[0072] The microwave generator 22 of the microwave oven 2 works to emit microwaves to the cooking cavity 21. The microwaves are reflected to the shielding tube 14 through the cooking cavity 21. The metal surface of the shielding tube 14 reflects the microwaves back to the cooking cavity 21, thereby preventing microwave leakage. Furthermore, if microwaves are emitted to the shielding layer 13, the metal coating of the shielding layer 13 reflects the microwaves back to the cooking cavity 21, thereby preventing microwave leakage.

[0073] The heating element of the heating tube body 11, such as a metal wire, generates heat, and the heat is transferred to the cooking cavity 21 through the air between the heating tube body 11 and the shielding layer tube 14 and through 1411 to heat the food.

[0074] According to the disclosure and teaching of the above description, the technical personnel in the field to which the utility model belongs can also change and modify the above implementation. Therefore, the utility model is not limited to the specific implementation methods disclosed and described above, and some modifications and changes to the utility model should also fall within the scope of protection of the claims of the utility model. In addition, although some specific terms are used in this specification, these terms are only for the convenience of description and do not constitute any limitation to the utility model.

Claims

1. A microwave leakage-proof heating tube, characterized in that: include: A heating tube body, in which a heating element is arranged, and the heating tube body is made of insulating material; Wiring terminals, which are formed by extending from both ends of the heating tube body; A shielding layer is provided outside the heating tube body, and / or a shielding tube is provided outside the heating tube body to prevent microwaves from passing through the heating tube body and then leaking from both ends of the heating tube body.

2. The microwave leakage-proof heating tube according to claim 1, characterized in that: The shielding layer is a metal coating coated on the outer surface of the heating tube body.

3. The microwave leakage-proof heating tube according to claim 2, characterized in that: The metal coating is one of silver, tin oxide, gold, or copper.

4. The microwave leakage-proof heating tube according to claim 1, characterized in that: The heating tube body is made of quartz material.

5. The microwave leakage-proof heating tube according to claim 1, characterized in that: The heating element is a heating wire arranged in the heating tube body, or a graphene conductive layer coated on the inner surface of the heating tube body; the wiring terminal is connected to the heating wire or the graphene conductive layer.

6. The microwave leakage-proof heating tube according to claim 1, characterized in that: The shielding tube comprises a shielding cover body, on which a plurality of through holes are spaced apart and distributed, and the diameter of the through holes is less than or equal to 5 mm.

7. The microwave leakage-proof heating tube according to claim 6, characterized in that: The shielding tube is made of metal material.

8. The microwave leakage-proof heating tube according to claim 6, characterized in that: The shielding tube has a first distance from the heating tube body.

9. A microwave oven, comprising the microwave leakage prevention heating tube according to any one of claims 1 to 8; the microwave oven further comprising: A cooking cavity, a water tank located on the cooking cavity, a steam generator, a microwave generator, and a fan for providing circulating convection wind into the cooking cavity.

10. The microwave oven according to claim 9, characterized in that: The cooking cavity is provided with a mounting hole, and the heating tube body is passed through the mounting hole; The heating tube body is at least partially contained in the cooking cavity, and the connection terminal is located outside the cooking cavity. When a shielding tube is provided outside the heating tube body, the shielding tube is at least partially located outside the cooking cavity, and is connected and fixed by welding at the junction of the shielding tube and the mounting hole; When a shielding layer is provided outside the heating tube body, the heating tube body is at least partially located outside the cooking cavity, and the heating tube body is connected to the cooking cavity via a fixing member, and the fixing member is connected and fixed to the cooking cavity by welding.

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