Kitchen appliance for heating

Abstract

The utility model relates to a kitchen appliance for heating, which comprises a shell, an upper cover, an inner container and a heating component, and the inner container is arranged in the shell and is made of a metal material. The heating assembly is arranged on the inner container and comprises a first insulating layer, a second insulating layer and a heating body, the heating body is arranged between the first insulating layer and the second insulating layer, and the heating body is connected with a power supply. Wherein the first insulating layer is arranged between the inner container and the heating body. When the upper cover is opened, the inner container made of metal materials is exposed. The first insulating layer and the second insulating layer wrap the heating body and serve as insulating layers of the heating body, current leakage on the heating body is effectively prevented, and a second-class electric appliance structure is achieved. Therefore, grounding limitation of the heating kitchen appliance with the exposed metal inner container is avoided, the structure and installation conditions of the appliance are simplified, and the practicability of the appliance is improved.

Description

Technical Field

[0001] The utility model relates to the field of household electrical appliances, in particular to a kitchen appliance for heating. Background Art

[0002] Heating kitchen appliances are popular in many households because of their ease of operation and high efficiency.

[0003] Some kitchen appliances have exposed metal inner shells, making them easier to clean and providing better heat transfer. Existing inner shell heating methods utilize a heating element brazed to the bottom of the inner shell. This method does not meet the requirements for reinforced insulation and cannot be used as a Class II appliance. Kitchen appliances with exposed inner shells require a grounding structure, which complicates the design and restricts installation.

[0004] It should be noted that the information disclosed in the above background technology section is only used to enhance the understanding of the background of the present disclosure, and therefore may include information that does not constitute prior art known to ordinary technicians in the field. Utility Model Content

[0005] In view of the above shortcomings of the prior art, the purpose of the present invention is to provide a heating kitchen appliance, which converts the heating kitchen appliance with exposed metal liner into a second-class appliance.

[0006] The technical solution of the utility model is as follows:

[0007] A heating kitchen appliance comprises an outer shell and an upper cover, wherein the upper cover is arranged on the outer shell, and further comprises: an inner liner arranged in the outer shell, wherein the inner liner is made of metal material; a heating component arranged on the inner liner, wherein the heating component comprises a first insulating layer, a second insulating layer and a heating element, wherein the heating element is arranged between the first insulating layer and the second insulating layer, and the heating element is connected to a power supply; wherein the first insulating layer is arranged between the inner liner and the heating element; when the upper cover is opened, the inner liner made of metal material is exposed.

[0008] A further technical solution is that the heating element is a heating wire, and the heating element is bent multiple times in a horizontal plane.

[0009] A further technical solution is that, after the heating element is bent, the distance between different bending sections is 2-4 mm.

[0010] A further technical solution is that the first insulating layer and the second insulating layer are made of insulating glue.

[0011] A further technical solution is that the first insulating layer and the second insulating layer are radially bonded by hot iron bonding.

[0012] A further technical solution is that the first insulating layer contacts the surface of the heating element and is provided with a thermal conductive coating.

[0013] A further technical solution is that the second insulating layer contacts the surface of the heating element and is provided with a heat-insulating coating.

[0014] A further technical solution is that the first insulating layer is bonded to the inner tank; and the heating element is bonded between the first insulating layer and the second insulating layer.

[0015] A further technical solution is that a flange is provided on the outer circumference of the inner container, and the lower surface of the flange contacts the outer shell.

[0016] A further technical solution is that a handle portion is bent on the flange, and a groove is provided on the shell for the handle portion to be inserted into.

[0017] The beneficial technical effects of the utility model are as follows:

[0018] (1) The heating kitchen appliance of the present invention has a heating component comprising a first insulating layer, a second insulating layer and a heating element. The heating element is disposed between the first insulating layer and the second insulating layer, and the first insulating layer contacts the inner container. The first insulating layer and the second insulating layer wrap around the heating element, acting as insulating layers for the heating element, effectively preventing current leakage from the heating element, thereby realizing a Class II electrical appliance structure. This eliminates the grounding restrictions of heating kitchen appliances with exposed metal inner containers, simplifies the electrical appliance structure and installation conditions, and increases the practicality of the appliance.

[0019] (2) Furthermore, the heating element is a heating wire that is bent multiple times, and the bending increases the length of the heating element in a limited space to adjust the resistance value and surface area of ​​the heating element, thereby improving the heating efficiency of the heating element.

[0020] (3) Furthermore, the first insulating layer and the second insulating layer are radially bonded by hot-ironing with a soldering iron. The hot-ironing with a soldering iron has a stronger heat resistance, which prevents the bond between the first insulating layer and the second insulating layer from being damaged when the heating element is heated, thereby improving the structural stability of the heating component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 The exploded structure diagram of the heating kitchen appliance of the present invention is shown.

[0022] Figure 2 The diagram shows the exploded structure of the heating component in the heating kitchen appliance of the present invention.

[0023] In the accompanying drawings:

[0024] 1. Upper cover; 2. Inner liner; 21. Flange; 22. Handle; 3. Outer shell; 31. Groove; 4. Heating element; 5. First insulating layer; 6. Second insulating layer. DETAILED DESCRIPTION

[0025] To make the purposes, features, and advantages of this utility model more clearly understood, please refer to the accompanying drawings. It should be noted that the structures, proportions, sizes, etc. illustrated in the drawings in this specification are only used to match the contents disclosed in this specification for the understanding and reading of those familiar with this technology. They are not intended to limit the conditions for the implementation of this utility model and therefore have no substantive technical significance. Any structural modifications, changes in proportions, or adjustments in size, as long as they do not affect the efficacy and objectives of this utility model, should still fall within the scope of the technical content disclosed in this utility model.

[0026] In the description of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "top", "bottom", "inside", "outside", "axial", "radial", "circumferential" and the like are defined as indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings. They are only used to facilitate the description of the present invention and simplify the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they should not be understood as limitations on the present invention.

[0027] Figure 1 The exploded structure diagram of the heating kitchen appliance of the present invention is shown. Figure 2 The exploded structure diagram of the heating component in the heating kitchen appliance of the present invention is shown. Figure 1 and Figure 2 A heating kitchen appliance includes an outer shell 3 and an upper cover 1. The upper cover 1 is arranged on the outer shell 3, and also includes an inner liner 2 and a heating component. The inner liner 2 is arranged in the outer shell 3, and the inner liner 2 is made of metal material. The heating component is arranged on the inner liner 2, and the heating component includes a first insulating layer 5, a second insulating layer 6 and a heating element 4. The heating element 4 is arranged between the first insulating layer 5 and the second insulating layer 6, and the heating element 4 is connected to a power supply. Among them, the first insulating layer 5 is arranged between the inner liner 2 and the heating element 4. When the upper cover 1 is opened, the inner liner 2 made of metal material is exposed. The first insulating layer 5 and the second insulating layer 6 wrap the heating element 4, acting as an insulating layer of the heating element 4, effectively preventing current leakage on the heating element 4, so as to realize a Class II electrical appliance structure. In this way, the grounding restriction of the heating kitchen appliance with an exposed metal inner liner 2 is eliminated, the electrical structure and installation conditions are simplified, and the practicality of the appliance is increased.

[0028] The specific structures of the heating element 4, the inner tank 2 and the outer shell 3 are described below:

[0029] Please refer to Figure 1 and Figure 2 The heating element 4 is a heating wire, which is easy to bend to adapt to heating spaces of various sizes and is more flexible in application. The heating element 4 using a heating wire is bent multiple times in the horizontal plane. The bending increases the length of the heating element 4 in a limited space to adjust the resistance value and surface area of ​​the heating element 4 and improve the heating efficiency of the heating element 4. The distance between different bending sections of the heating element 4 after bending is 2-4mm. If the heating elements 4 are too close to each other after bending, when they are less than 2mm, it may cause the heating element 4 to short-circuit, thereby generating excessive heat and even causing combustion, posing a safety hazard. At the same time, if the heating elements 4 are too far apart after bending, when they are greater than 4mm, the space utilization rate of the heating element 4 is too small, the total heat output is reduced, and the heating efficiency of the electrical appliance is affected. In addition, the heating element 4 can also adopt a heating plate, which has a shorter preheating time and high heating efficiency.

[0030] In this embodiment, the inner liner 2 is provided with a flange 21 extending outwardly from the circumference, with the lower surface of the flange 21 contacting the outer shell 3. When the upper cover 1 is placed on the outer shell 3, the flange 21 is clamped between the upper cover 1 and the outer shell 3, thereby enhancing the stability of the inner liner 2. A handle 22 is also bent on the flange 21, and a groove 31 is provided on the outer shell 3 for the handle 22 to engage. The handle 22 and groove 31 cooperate to restrict the rotation of the inner liner 2, further enhancing the stability of the inner liner 2.

[0031] The specific structures of the first insulating layer 5 and the second insulating layer 6 are described below:

[0032] Please refer to Figure 1 and Figure 2 , the first insulating layer 5 and the second insulating layer 6 are insulating glue. The insulating glue has good electrical insulation performance, heat resistance, and good thermal conductivity. The first insulating layer 5 and the second insulating layer 6 made of insulating glue can prevent the heating element 4 from leaking electricity, while being able to withstand and transfer the heat generated by the heating element 4 to the inner tank 2 for heating. The high temperature generated by the heating element 4 will affect the adhesion of ordinary glue. If the first insulating layer 5 and the second insulating layer 6 are connected by ordinary glue, the stability of the connection cannot be guaranteed. The first insulating layer 5 and the second insulating layer 6 are radially bonded by hot iron bonding. The electric soldering iron heats and softens the first insulating layer 5 and the second insulating layer 6. At this time, the first insulating layer 5 and the second insulating layer 6 are attached. After cooling, the first insulating layer 5 and the second insulating layer 6 are bonded together. Hot iron bonding has a certain high temperature resistance, which avoids the viscosity of the first insulating layer 5 and the second insulating layer 6 being reduced after being exposed to high temperature, so as to ensure the stable connection between the first insulating layer 5 and the second insulating layer 6.

[0033] In this embodiment, the first insulating layer is bonded to the inner liner, and the heating element is bonded between the first and second insulating layers. Specifically, this bonding can be achieved using glue made of polyimide. Polyimide has H-class electrical insulation performance, which can ensure insulation. Polyimide also has good heat resistance, which can prevent the high temperature of the heating element from causing the viscosity to decrease, thereby preventing the heating element from becoming unstable with the inner liner 2.

[0034] Furthermore, the first insulating layer 5 contacts the surface of the heating element 4 and is provided with a thermal conductive coating to enhance the thermal conductivity of the first insulating layer 5 and improve the efficiency of heat transfer between the heating element 4 and the inner tank 2. The thermal conductive coating can be a silica coating. The silica coating is thermally conductive while having good electrical insulation and heat resistance, and is suitable for contacting the heating element 4. The second insulating layer 6 contacts the surface of the heating element 4 and is provided with a thermal insulation coating. The end of the second insulating layer 6 away from the heating element 4 is bonded to the inner bottom surface of the outer shell 3. The thermal insulation coating reduces the heat loss of the heating element 4 while reducing the temperature of the second insulating layer 6 and the heat transferred to the outer shell 3 by the second insulating layer 6, thereby reducing the temperature of the outer shell 3 and protecting the components inside the outer shell 3.

[0035] The specific workflow of this utility model is as follows:

[0036] During heating, the heating element 4 generates heat when powered. The first insulating layer 5 and the second insulating layer 6 surrounding the heating element 4 prevent electrical leakage. Simultaneously, the first insulating layer 5 and the thermally conductive coating transfer heat from the heating element 4 to the inner container 2 for heating. The second insulating layer 6 and the thermal barrier coating limit the transfer of heat from the heating element 4, lowering the temperature of the outer shell 3.

[0037] It can be seen that the above-mentioned heating kitchen appliance realizes the second-class electrical appliance structure of the heating kitchen appliance with the metal inner liner 2 exposed, thereby eliminating the grounding restriction of the appliance, simplifying its structure and installation conditions, and increasing practicality.

[0038] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0039] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that a person of ordinary skill in the art would be able to make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements fall within the scope of protection of the present invention. Therefore, the scope of protection of the present utility model patent shall be determined by the appended claims.

Claims

1. A heating kitchen appliance, comprising a housing and an upper cover, wherein the upper cover is arranged on the housing, characterized in that: Also includes: An inner liner is arranged in the outer shell, and the inner liner is made of metal material; A heating component is provided on the inner tank, the heating component includes a first insulating layer, a second insulating layer and a heating element, the heating element is provided between the first insulating layer and the second insulating layer, and the heating element is connected to a power supply; Wherein, the first insulating layer is arranged between the inner container and the heating element; when the upper cover is opened, the inner container made of metal is exposed.

2. The heating kitchen appliance according to claim 1, wherein: The heating element is a heating wire, and the heating element is bent multiple times in a horizontal plane.

3. The heating kitchen appliance according to claim 2, wherein: After the heating element is bent, the distance between different bending sections is 2-4 mm.

4. The heating kitchen appliance according to claim 1, wherein: The first insulating layer and the second insulating layer are made of insulating glue.

5. The heating kitchen appliance according to claim 1, wherein: The first insulating layer and the second insulating layer are radially bonded by hot iron bonding.

6. The heating kitchen appliance according to claim 1, wherein: The first insulating layer contacts the surface of the heating element and is provided with a thermal conductive coating.

7. The heating kitchen appliance according to claim 1, wherein: The second insulating layer contacts the surface of the heating element and is provided with a heat insulation coating.

8. The heating kitchen appliance according to claim 1, wherein: The first insulating layer is bonded to the inner container; the heating element is bonded between the first insulating layer and the second insulating layer.

9. The heating kitchen appliance according to claim 1, wherein: The inner container is provided with a flange in the circumferential direction outward, and the lower surface of the flange contacts the outer shell.

10. The heating kitchen appliance according to claim 9, wherein: A handle portion is bent on the flange, and a groove is provided on the shell for the handle portion to be inserted into.

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