Inner housing assembly of a cooking appliance and cooking appliance having the same

Abstract

The present application relates to the technical field of household appliances, in particular to an inner shell assembly of a cooking appliance and a cooking appliance with the same. The present application aims to solve the technical problem of slow heating of the existing cooking appliance. To this end, the present application provides an inner shell assembly of a cooking appliance, the inner wall of the inner shell assembly surrounds a heating cavity of the cooking appliance, the inner wall is made of a high reflectivity material and / or the inner wall is coated with a high reflectivity coating, and the inner wall protrudes into the heating cavity with a plurality of heat dissipation protrusions, the inner shell assembly further comprises a heating element for emitting heat waves into the heating cavity, the heat waves emitted by the heating element are uniformly scattered into the heating cavity after being reflected by the plurality of heat dissipation protrusions. The cooking appliance of the present application can improve the reflection effect of heat waves by using high reflectivity material and / or high reflectivity coating, at the same time, the plurality of heat dissipation protrusions can improve the scattering effect of heat waves, so as to improve the heating rate of the cooking appliance.

Description

Technical Field

[0001] This invention relates to the field of home appliance technology, and more specifically to an inner shell assembly of a cooking appliance and a cooking appliance having the same. Background Technology

[0002] This section provides only background information relevant to this disclosure and is not necessarily prior art.

[0003] When using cooking utensils for baking, users need to preheat them in advance for better baking results. This process takes about 5-10 minutes and is time-consuming, energy-intensive, and tedious.

[0004] The inner wall of a cooking appliance absorbs heat from the hot air inside and also receives radiant heat from the heating element. Traditional cooking appliances typically use metal materials for their inner walls, such as stainless steel or galvanized steel, which have high thermal conductivity and large heat capacity. Therefore, the metal inner cavity absorbs a significant amount of heat from both the hot air and the heating element. To reduce heat loss within the appliance cavity, current technologies increase the thermal resistance between the inner cavity and the outer casing, thus slowing heat dissipation. However, this does not prevent the inner cavity from absorbing heat from the hot air and heating element, resulting in a slow rate of temperature rise within the appliance. Summary of the Invention

[0005] The present invention aims to at least partially solve the technical problem of slow heating of existing cooking appliances.

[0006] To achieve the above objectives, the present invention provides an inner shell assembly for a cooking appliance. The inner wall of the inner shell assembly forms a heating cavity of the cooking appliance. The inner wall is made of a high reflectivity material and / or coated with a high reflectivity coating. The inner wall has multiple heat dissipation protrusions protruding into the heating cavity. The inner shell assembly also includes a heating element that emits heat waves into the heating cavity. The heat waves emitted by the heating element are uniformly scattered into the heating cavity after being reflected by the multiple heat dissipation protrusions.

[0007] The cooking appliance of the present invention can improve the heat wave reflection effect through high reflectivity materials and / or high reflectivity coatings. At the same time, multiple heat dissipation protrusions can improve the heat wave scattering effect, thereby increasing the heating rate of the cooking appliance.

[0008] In addition, the inner shell assembly of the cooking appliance described above according to the present invention may also have the following additional technical features:

[0009] According to one embodiment of the present invention, each heat dissipation protrusion has a heat dissipation cavity inside, and a heating element is disposed in each heat dissipation cavity. The heat wave generated by the heating element is uniformly scattered to the heating cavity through multiple heat dissipation protrusions.

[0010] According to one embodiment of the present invention, the plurality of heat dissipation protrusions include annular protrusions, annular heat dissipation cavities are formed within the annular protrusions, and the heating element includes annular heating elements disposed within the annular heat dissipation cavity.

[0011] According to one embodiment of the present invention, the inner wall is integrally formed with a plurality of heat dissipation protrusions, and a plurality of processing ports of the plurality of heat dissipation protrusions and a plurality of heat insulation elements for sealing the plurality of processing ports are formed on the side of the inner wall opposite to the heating cavity.

[0012] According to one embodiment of the present invention, the high reflectivity coating that avoids multiple heat dissipation protrusions includes a transparent coating, a film layer, a PET layer and a weather-resistant layer distributed from the outside to the inside.

[0013] According to one embodiment of the present invention, the inner wall is provided with a first heat insulation layer composed of inorganic material or organic polymer material. The first heat insulation layer is arranged to avoid multiple heat dissipation protrusions, and a high reflectivity coating is applied to the first heat insulation layer.

[0014] According to one embodiment of the present invention, the inner shell assembly includes a metal inner shell and a low thermal conductivity coating formed of an inorganic material or an organic polymer material coated onto the inner wall of the metal inner shell. The low thermal conductivity coating is disposed away from multiple heat dissipation protrusions, and a high reflectivity coating is coated on the low thermal conductivity coating.

[0015] According to one embodiment of the present invention, the inner shell assembly includes a heat insulation plate and a metal inner shell. The heat insulation plate is disposed on the inner wall of the metal inner shell, avoiding multiple heat dissipation protrusions. The heat insulation plate forms a heating cavity inside the cooking appliance. The heat insulation plate is coated with a high reflectivity coating.

[0016] According to one embodiment of the present invention, the heat insulation plate is embedded in the inner wall of the metal inner shell, and the heat insulation plate is installed in the cooking appliance through the metal inner shell.

[0017] According to one embodiment of the present invention, a heating tube is provided at the top and / or bottom of the inner shell assembly, and the top of the inner shell assembly is also provided with a plurality of arc-shaped protrusions that reflect heat waves into the heating cavity, the plurality of arc-shaped protrusions being made of a high reflectivity material and / or the plurality of arc-shaped protrusions being coated with a high reflectivity coating.

[0018] According to one embodiment of the present invention, the high reflectivity material includes at least one of mirror aluminum or mirror stainless steel.

[0019] A second aspect of the invention also provides a cooking appliance comprising a housing and an inner housing assembly according to the first aspect of the invention. Attached Figure Description

[0020] Various other advantages and benefits will become apparent to those skilled in the art upon reading the following detailed description of preferred embodiments. The accompanying drawings are for illustrative purposes only and are not intended to limit the invention. Furthermore, the same reference numerals denote the same parts throughout the drawings. In the drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the cooking utensil according to the first embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the structure of a cooking appliance according to the second embodiment of the present invention;

[0023] Figure 3 This is one embodiment of the present invention. Figure 2 A schematic diagram of the structure of the inner wall of the cooking appliance shown;

[0024] Figure 4 Another embodiment of the present invention Figure 2 A schematic diagram of the structure of the inner wall of the cooking appliance shown;

[0025] Figure 5 This is one embodiment of the present invention. Figure 2 A cross-sectional view of the inner wall of the cooking appliance shown;

[0026] Figure 6 Another embodiment of the present invention Figure 2 A cross-sectional view of the inner wall of the cooking appliance shown;

[0027] Figure 7 This is a schematic diagram of the structure of a cooking appliance according to the third embodiment of the present invention;

[0028] Figure 8 This is a schematic diagram of the structure of a cooking appliance according to the fourth embodiment of the present invention;

[0029] Figure 9 This is a schematic diagram of the structure of a cooking appliance according to the fifth embodiment of the present invention.

[0030] The reference numerals in the attached figures are as follows:

[0031] 100. Cooking utensils;

[0032] 10. Outer casing;

[0033] 20. Inner shell assembly;

[0034] 201. Inner wall; 202. Heat dissipation protrusion; 203. Heating element; 204. High reflectivity coating; 205. Arc-shaped protrusion;

[0035] 21. First insulation layer; 22. Second insulation layer; 23. Heat insulation board; 24. Metal inner shell; 25. Low thermal conductivity coating;

[0036] 30. Heating element;

[0037] C. Heating chamber;

[0038] 40. Control unit. Detailed Implementation

[0039] Exemplary embodiments of the present disclosure will now be described in more detail with reference to the accompanying drawings. While exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the disclosure to those skilled in the art. It should be noted that the inner shell assembly of the cooking appliance of the present invention is not limited to ovens, but is also applicable to other steaming and baking equipment such as steam cooking appliances; such modifications fall within the protection scope of the inner shell assembly of the cooking appliance of the present invention.

[0040] It should be understood that the terminology used herein is for the purpose of describing particular exemplary embodiments only and is not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms “a,” “an,” and “described” as used herein may also mean including the plural forms. The terms “comprising,” “including,” and “having” are inclusive and therefore indicate the presence of the stated features, elements, and / or components, but do not exclude the presence or addition of one or more other features, elements, components, and / or combinations thereof.

[0041] In the description of this invention, unless otherwise explicitly specified and limited, the terms "set" and "connection" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0042] For ease of description, spatial relative terms may be used in the text to describe the relationship of one element or feature relative to another element or feature, as shown in the figure. These relative terms include, for example, "back to back," "outside," "below," "above," "left," "right," "inside," etc. Such spatial relative terms are intended to include different orientations of the mechanism in use or operation, other than those depicted in the figure. For example, if the mechanism in the figure is flipped, then an element described as "below other elements or features" or "below other elements or features" will subsequently be oriented as "above other elements or features" or "above other elements or features." Therefore, the example term "below" can include both above and below orientations. The mechanism may be otherwise oriented (rotated 90 degrees or in other directions), and the spatial relative descriptors used in the text will be interpreted accordingly.

[0043] like Figure 1 and Figure 2 As shown, in order to clearly describe the inner shell assembly 20 of the cooking appliance 100 of the present invention and the cooking appliance 100 having therein, the cooking appliance 100 provided by the present invention will be described in detail below. The cooking appliance 100 of the present invention can be an oven, a steam oven, or a microwave oven, etc. According to the embodiment provided by the present invention, the cooking appliance 100 includes an outer shell 10 and an inner shell assembly 20 disposed within the outer shell 10. The inner wall of the inner shell assembly 20 forms a heating cavity C for holding food within the cooking appliance 100. A heating tube 30 (e.g., a heating element or a steam generator) is disposed within the heating cavity C. The heating tube 30 exchanges heat with the air within the heating cavity C through thermal radiation. The heated air heats the food within the heating cavity C through thermal conduction.

[0044] Those skilled in the art will understand that during the heat exchange between the heating tube 30 and the air in the heating chamber C, and during the heat exchange between the air in the heating chamber C and the food in the heating chamber C, the inner shell assembly 20 absorbs some heat and dissipates the absorbed heat to the outside of the cooking appliance 100 through the outer shell 10, resulting in energy loss and reduced heating efficiency of the cooking appliance 100.

[0045] To reduce energy loss and improve heating efficiency of the cooking appliance 100, embodiments of this application provide that the inner wall 201 is made of a high-reflectivity material and / or coated with a high-reflectivity coating 204, and that the inner wall 201 has multiple heat dissipation protrusions 202 protruding into the heating cavity C. The inner shell assembly 20 also includes a heating element 203 (e.g., emitting heat waves into the heating cavity C). Figure 5 As shown), heating element 203 (as shown) Figure 5 The heat waves emitted (as shown) are uniformly scattered into the heating cavity C after being reflected by multiple heat dissipation protrusions 202.

[0046] Those skilled in the art will understand that the "high reflectivity" described in the embodiments of this application is not a limitation on the range of reflectivity thresholds, but a limitation on specific materials. Those skilled in the art can determine one or more materials based on "high reflectivity". The embodiments of the specific materials limited by "high reflectivity" will be described below.

[0047] Additionally, it should be noted that the high-reflectivity inner wall 201 of the inner shell assembly 20 described in the above embodiments includes making the inner wall 201 of the inner shell assembly 20 from a high-reflectivity material, and also includes applying a high-reflectivity coating 204 to the inner wall 201 of the inner shell assembly 20. Both of these embodiments are intended to improve the reflectivity of the heating element 203 (e.g., ...) in the inner shell assembly 20. Figure 5 The heat waves emitted (as shown) are all within the protection scope of the inner shell assembly 20 in this application embodiment. The specific embodiments of the inner wall of the inner shell assembly 20 are described in detail below through five examples.

[0048] According to a first embodiment of the present invention: Figure 1 As shown, the inner wall 201 of the inner shell assembly 20 forms the heating cavity C of the cooking appliance 100, and the inner wall 201 is coated with a high reflectivity coating 204, such as... Figure 2 As shown, the inner wall 201 is made of a highly reflective material, and multiple heat dissipation protrusions 202 protrude from the inner wall 201 into the heating cavity C. The inner shell assembly 20 also includes a heating component that emits heat waves into the heating cavity C. The heating component includes a heating tube 30 disposed in the heating cavity C and a heating element 203 disposed in the heat dissipation protrusions 202 (e.g., Figure 5 As shown, the heat waves emitted by the heating tube 30 and the heating element 203 are uniformly scattered into the heating cavity C after being reflected by multiple heat dissipation protrusions 202.

[0049] Furthermore, such as Figure 5 As shown, each heat dissipation protrusion 202 has a heat dissipation cavity inside, and a heating element 203 is provided in each heat dissipation cavity. The heat wave generated by the heating element 203 is evenly scattered to the heating cavity C through multiple heat dissipation protrusions 202.

[0050] In this embodiment, the heat dissipation protrusion 202 can be penetrated by microwaves. The heat dissipation protrusion 202 can be made of metal, glass, resin, etc. Multiple heat dissipation protrusions 202 can be independent components mounted on the inner wall 201, or they can be integrally formed with the inner wall 201. When a heat dissipation protrusion 202 is integrally formed with the inner wall 201, multiple processing openings, such as stamping holes, are formed on the side of the inner wall 201 opposite to the heating cavity C. Multiple heat insulation elements are provided on the side of the inner wall 201 opposite to the heating cavity C to block the multiple processing openings, thereby reducing heat loss within the heat dissipation cavity.

[0051] It should be noted that the embodiments of the present invention do not limit the shape and structure of the heat dissipation protrusion 202, because the heat dissipation protrusion 202 can be configured in various shapes and structures. For example, the heat dissipation protrusion 202 can be configured as an annular protrusion, a strip protrusion, a corrugated protrusion, or a combination of annular protrusion, strip protrusion and corrugated protrusion. All of these structures are within the protection scope of the heat dissipation protrusion 202.

[0052] like Figure 3 As shown, according to one embodiment of the present invention, the plurality of heat dissipation protrusions 202 include annular protrusions, and annular heat dissipation cavities are formed within the annular protrusions. The heating element 203 includes annular heating elements disposed within the annular heat dissipation cavities. The annular heating elements include annular heating resistance wires or annular heating tubes, etc. The microwaves generated by the annular heating elements can scatter heat into the heating cavity C through the arc surfaces on the annular protrusions. Furthermore, the plurality of heat dissipation protrusions 202 are evenly distributed on the inner wall 201 of the inner shell assembly 20, thereby achieving the effect of uniform heat distribution within the heating cavity C and reducing the phenomenon of local overheating or local undercooling within the heating cavity C.

[0053] like Figure 4 As shown, according to one embodiment of the present invention, the plurality of heat dissipation protrusions 202 include strip-shaped protrusions, and strip-shaped heat dissipation cavities are formed within the strip-shaped protrusions. The heating element 203 includes a strip-shaped heating element disposed within the strip-shaped heat dissipation cavity. The strip-shaped heating element includes a strip-shaped heating resistance wire or a strip-shaped heating tube, etc. The heat waves generated by the strip-shaped heating element can scatter heat into the heating cavity C through the arc surface on the strip-shaped protrusions, and the plurality of heat dissipation protrusions are evenly distributed to the inner wall 201 of the inner shell assembly 20, thereby achieving the effect of uniform heat distribution within the heating cavity C and reducing the phenomenon of local overheating or local undercooling within the heating cavity C.

[0054] The multiple heat dissipation cavities within the multiple heat dissipation protrusions 202 can be isolated from each other, and the multiple heating elements 203 within the multiple heat dissipation cavities can be independent of each other. Alternatively, the multiple heat dissipation cavities can be interconnected, and the multiple heating elements 203 within the multiple heat dissipation cavities can be connected in series. For example, according to one embodiment of the present invention, the multiple heat dissipation protrusions 202 include wavy protrusions, within which multiple wavy heat dissipation cavities are formed that are interconnected, and the multiple heating elements 203 within the multiple wavy heat dissipation cavities are connected in series.

[0055] When multiple heating elements 203 are independent of each other, a position sensor is provided in the heating cavity C. For example, the position sensor can be an infrared sensor or an ultrasonic sensor. The position sensor detects the position of the food, and then the control unit 40 controls the heating element 203 at the corresponding position to work, thereby achieving the effect of directional heating of the food, improving the heating efficiency of the food, and reducing heat loss.

[0056] In addition, the heating area of ​​each heating element 203 is determined by the position and shape of each heat dissipation protrusion, or the heating area of ​​each heating element 203 is obtained through experiments. The cooking appliance 100 also includes a temperature probe (not shown in the figure) disposed in the heating cavity C. The temperature probe is equipped with multiple temperature sensors. When heating food, the temperature probe is inserted into the food, and the temperature of each part of the food is monitored in real time by the multiple temperature sensors on the temperature probe, so as to achieve the effect of precise heating of each part of the food and reduce the phenomenon of local burning or local undercooking of the food.

[0057] According to an embodiment of the present invention, the portion of the high reflectivity coating 204 that avoids the plurality of heat dissipation protrusions 202 includes a transparent coating, a film layer, a PET layer and a weather-resistant layer distributed from the outside to the inside, wherein the film layer includes at least one of an aluminum oxide layer or a silicon oxide layer.

[0058] When applying a high-reflectivity coating to the inner wall 201, aluminum oxide is first vacuum-deposited onto one side of the PET to create a coating layer, preferably with a thickness of 5–10 μm. A transparent coating is then applied to the surface of this coating layer, preferably with a thickness of 5–20 μm. Simultaneously, a fluorocarbon coating is directly applied to the other side of the PET, preferably with a thickness of 10–30 μm. After drying, the desired high-reflectivity coating 204 is obtained.

[0059] The inner wall 201 of the inner shell assembly 20 and the high reflectivity coating 204 can be directly heat-pressed together and have strong adhesion, good electrical insulation, and water vapor barrier properties. In particular, it has a high reflectivity, which can effectively improve the heat utilization rate of the cooking appliance 100, while improving the UV resistance of the inner wall 201 of the inner shell assembly 20, thereby slowing down the aging rate of the inner wall 201 and extending the service life of the inner shell assembly 20.

[0060] According to an embodiment of the present invention, the high reflectivity material includes at least one of mirror aluminum or mirror stainless steel. The mirror aluminum plate or mirror stainless steel plate is processed into the inner wall 201 of the inner shell assembly 20 by stamping, thereby improving the overall reflectivity of the inner wall 201 of the inner shell assembly 20.

[0061] Furthermore, the arc surface of the heat dissipation protrusion 202 is a parabola or a sphere. By setting the arc surface of the heat dissipation protrusion 202 to a parabola or a sphere, the microwave reflection effect at various positions on the arc surface can be made more uniform.

[0062] Furthermore, the inner wall 201 of the inner shell assembly 20 is also provided with a vent hole, which is located on the arc-shaped surface of a portion of the heat dissipation protrusion 202.

[0063] When vent holes are stamped on the inner wall 201, the vent hole area may be deformed by stress, affecting the appearance. By setting the vent hole on the arc surface of the heat dissipation protrusion, the vent hole is processed at the same time when the heat dissipation protrusion 202 is stamped, and the deformation that may occur when processing the vent hole is transformed into the deformation of the arc surface, thus ensuring the overall aesthetics of the inner wall 201.

[0064] Furthermore, the diameter of the heat dissipation protrusion 202 with the vent is larger than the diameter of the other heat dissipation protrusions 202. Since the surface area of ​​the heat dissipation protrusion 202 with the vent is partially occupied by the vent, in order to ensure the reflection efficiency of the heat dissipation protrusion 202, the diameter of the heat dissipation protrusion 202 with the vent is set to be larger than the diameter of the other heat dissipation protrusions 202.

[0065] According to a second embodiment of the present invention: Figure 6 and Figure 7 As shown, in order to reduce energy loss and improve heating efficiency of cooking appliance 100, embodiments of this application provide that the inner shell assembly 20 is provided with an inner wall having a low thermal conductivity, for example, the threshold of thermal conductivity of the inner wall of the inner shell assembly 20 is 0w / mk-5w / mk. At the same time, the inner wall of the inner shell assembly 20 also has high temperature resistance, for example, the high temperature resistance threshold of the inner wall of the inner shell assembly 20 is 200-600℃.

[0066] It should be noted that the inner shell assembly 20 described in the above embodiments has an inner wall with a low thermal conductivity. This includes making the inner wall of the inner shell assembly 20 made of a low thermal conductivity material, and also includes applying a low thermal conductivity coating 25 to the inner wall of the inner shell assembly 20. The low thermal conductivity coating 25 is positioned to avoid the multiple heat dissipation protrusions 204. Both of these embodiments are intended to reduce the heat absorbed by the inner shell assembly 20 from the heating tube, and both fall within the protection scope of the inner shell assembly 20 in this application. The specific embodiments of the inner wall of the inner shell assembly 20 will be described in detail below.

[0067] The inner wall of the inner shell assembly 20 includes a first insulation layer 21 composed of inorganic or organic polymer materials. The first insulation layer 21 is positioned to avoid multiple heat dissipation protrusions 202, and a high reflectivity coating 204 is applied to the first insulation layer 21.

[0068] In this embodiment, the outline of the first insulation layer 21 corresponds to the outline of the outer shell 10. Taking the shape of the outer shell 10 as a rectangular box structure as an example, the first insulation layer 21 is also a rectangular box structure. The internal space enclosed by the first insulation layer 21 forms the heating cavity of the cooking appliance 100.

[0069] Furthermore, the first insulation layer 21 not only has a low thermal conductivity but also high temperature resistance. The first insulation layer 21 is made of a rigid material with low thermal conductivity, low heat capacity, and high temperature resistance. For example, the first insulation layer 21 includes one of a ceramic layer, a glass layer, a PTFE insulation layer, a PI insulation layer, or a PBI insulation layer, thereby achieving a thermal conductivity of 0 W / mK-5 W / mK and a high temperature resistance threshold of 200℃.

[0070] -600℃, thereby reducing energy loss of cooking appliance 100 and improving heating efficiency of cooking appliance 100.

[0071] According to the third embodiment of the present invention:

[0072] like Figure 8 As shown, the inner shell assembly 20 includes a heat insulation plate 23 and a metal inner shell 24. The heat insulation plate 23 is disposed on the inner wall of the metal inner shell 24, avoiding the position of multiple heat dissipation protrusions 204. A high reflectivity coating 204 is applied to the heat insulation plate 23.

[0073] In this embodiment, the metal inner shell 24 serves to support and install the heating tube. That is, the heating cavity is supported by the metal inner shell 24, while the heat insulation plate 23 only serves to insulate the heat, thereby reducing the risk of the heat insulation plate 23 being damaged under external force. Specifically, the heat insulation plate 23 also has low thermal conductivity and high temperature resistance. The heat insulation plate 23 is made of a rigid material with low thermal conductivity, low heat capacity, and high temperature resistance. The heat insulation plate 23 can be made of one of the following: ceramic layer, glass layer, PTFE, PI, or PBI.

[0074] The difference between the heat insulation plate 23 in this embodiment and the first insulation layer 21 in the second embodiment is that a metal inner shell 24 is provided on the outer wall of the heat insulation plate 23 in this embodiment. The heat insulation plate 23 can be set tightly against the inner wall of the metal inner shell 24, or it can be distributed with a gap between it and the metal inner shell 24. Setting the heat insulation plate 23 tightly against the inner wall of the metal inner shell 24 can improve the overall structural strength of the inner shell assembly 20. The distribution of the heat insulation plate 23 and the metal inner shell 24 with a gap can further improve the heat insulation performance of the inner shell assembly 20. The specific distribution of the heat insulation plate 23 and the metal inner shell 24 will be described in detail below.

[0075] In some embodiments of the present invention, the thickness threshold of the heat insulation plate 23 is 1mm-10mm, and the metal inner shell 24 is provided with mounting grooves or hollow structures for mounting the heat insulation plate 23. Specifically, the thickness of the metal inner shell 24 is greater than 10mm, and the inner walls of the metal inner shell 24 are provided with one or more mounting grooves that cooperate with the heat insulation plate 23. There are one or more heat insulation plates 23, and each mounting groove is provided with one heat insulation plate 23. The heat insulation plates 23 and the metal inner shell 24 distributed in this way not only improve the heat insulation effect of the inner shell assembly 20, but also improve the overall structural strength of the inner shell assembly 20.

[0076] Furthermore, in some other embodiments of the present invention, the mounting groove can penetrate through the metal inner shell 24, thereby forming a hollow structure inside the metal inner shell 24, with the heat insulation plate 23 located inside the hollow structure and installed on the frame of the metal inner shell 24.

[0077] In some embodiments of the present invention, the thickness threshold of the heat insulation plate 23 is 1mm-10mm, and the metal inner shell 24 is provided with mounting grooves or hollow structures for mounting the heat insulation plate 23. Specifically, the thickness of the metal inner shell 24 is greater than 10mm, and the inner walls of the metal inner shell 24 are provided with one or more mounting grooves that cooperate with the heat insulation plate 23. There are one or more heat insulation plates 23, and each mounting groove is provided with one heat insulation plate 23. The heat insulation plates 23 and the metal inner shell 24 distributed in this way not only improve the heat insulation effect of the inner shell assembly 20, but also improve the overall structural strength of the inner shell assembly 20.

[0078] Furthermore, in some other embodiments of the present invention, the mounting groove can penetrate through the metal inner shell 24, thereby forming a hollow structure inside the metal inner shell 24, with the heat insulation plate 23 located inside the hollow structure and installed on the frame of the metal inner shell 24.

[0079] In some embodiments of the present invention, in order to facilitate the disassembly and maintenance of the heat insulation plate 23, the embodiments of this application disclose that the heat insulation plate 23 is detachably installed on the metal inner shell 24. Specifically, a plug is provided on the outer wall of the heat insulation plate 23, and the plug can be a metal snap-fit ​​piece. The inner wall of the metal inner shell 24 is provided with a slot that mates with the plug. The heat insulation plate 23 is installed on the metal inner shell 24 through the plug and the slot.

[0080] Furthermore, four heat insulation plates 23 can be installed inside the metal casing to facilitate the disassembly, assembly, and maintenance of any damaged heat insulation plates 23. After the heat insulation plates 23 are installed on the metal casing, there is a heat insulation gap between the heat insulation plates 23 and the metal casing. This heat insulation gap can provide heat insulation, thereby improving the heat insulation effect of the inner casing assembly 20.

[0081] To further improve the heat insulation effect of the inner shell assembly 20, embodiments of this application also propose to provide a second heat insulation layer 22 on the outer wall of the metal inner shell 24. The second heat insulation layer 22 can be made of the same material and structure as the first heat insulation layer 21 in the first embodiment. When the heat insulation plate 23 and the metal inner shell 24 absorb the heat in the heating cavity C, the second heat insulation layer 22 can reduce the heat exchange and heat exchange efficiency between the heat insulation plate 23, the metal inner shell 24 and the outer shell 10, thereby achieving the effect of heat insulation for the heating cavity C.

[0082] According to the fourth embodiment of the present invention:

[0083] The inner housing assembly 20 includes a metal inner housing 24 and a low thermal conductivity coating 25 applied to the inner wall of the metal inner housing 24. The low thermal conductivity coating 25 is disposed away from multiple heat dissipation protrusions 204, and a high reflectivity coating 205 is applied to the low thermal conductivity coating 25.

[0084] In this embodiment, the low thermal conductivity coating 25 can be a high-temperature resistant thermally conductive coating, such as ceramic glaze, which can be directly sprayed onto the inner wall of the metal inner shell 24 to form a hard ceramic glaze shell. This reduces the amount of heat exchange between the metal inner shell 24 and the high-temperature air in the heating chamber C, thereby increasing the heating rate of the cooking appliance 100 and reducing...

[0085] According to the fifth embodiment of the present invention: the top of the inner shell assembly 20 is provided with an arc-shaped protrusion 205 for reflecting microwaves into the heating cavity C. The heating tube 30 can be disposed at the top or bottom of the heating cavity C. When the heating tube 30 is disposed at the bottom of the heating cavity C, since the microwaves are emitted upward from the area near the center of the bottom of the heating cavity C, the microwaves are mainly concentrated in the middle area of ​​the heating cavity C. By providing the arc-shaped protrusion 205 near the top of the inner shell assembly 20, the microwaves emitted upward from the bottom of the heating cavity C are reflected at more and wider angles on the arc surface of the arc-shaped protrusion 205, thereby dispersing the microwaves to increase the microwave density in the edge area of ​​the heating cavity C and improve the uniformity of microwave distribution in the heating cavity C.

[0086] Furthermore, the diameter of the arc-shaped protrusion 205 increases with the increase of the distance from the center. When the height of the arc-shaped protrusion 205 is constant, the smaller the diameter of the arc-shaped protrusion 205, the greater the curvature of the arc surface of the arc-shaped protrusion 205, which makes the angle between the incident microwave and the reflected microwave larger.

[0087] By making the diameter of the arc-shaped protrusion 205 near the center on the top of the inner wall relatively small, the angle between the incident microwave and the reflected microwave is increased, thereby better increasing the microwave density in the surrounding area. Similarly, the arc-shaped protrusion 205 in the surrounding area allows the reflected microwaves to still be concentrated in this area, further increasing the microwave density in the surrounding area. In this way, the microwaves in the heating cavity C are more uniform, resulting in better cooking effects.

[0088] Furthermore, the diameter-to-height ratio of the arc-shaped protrusion 205 ranges from 1 to 70. If the diameter-to-height ratio of the arc-shaped protrusion 205 is too large, the curvature of the arc surface of the arc-shaped protrusion 205 will be too small, resulting in a small angle between the microwave incident angle and the reflection angle, making it difficult to improve the uniformity of the microwave. If the diameter-to-height ratio of the arc-shaped protrusion 205 is too small, the curvature of the arc surface of the arc-shaped protrusion 205 will be too large, increasing the processing difficulty of the arc-shaped protrusion 205.

[0089] By limiting the diameter-to-height ratio of the arc-shaped protrusion 205 to 1-70, both good manufacturability and the ability to ensure that the microwaves reflected by the arc-shaped protrusion 205 are uniformly distributed within the heating cavity C can be obtained.

[0090] Furthermore, the diameter of the arc-shaped protrusion 205 ranges from 5mm to 35mm. If the diameter of the arc-shaped protrusion 205 is too small, the processing difficulty of the arc-shaped protrusion 205 will be too great; if the diameter of the arc-shaped protrusion 205 is too large, the number of arc-shaped protrusions 205 will be limited, which will have limited effect on improving the uniformity of microwaves. By limiting the diameter range of the arc-shaped protrusion 205 to 5mm to 35mm, both good manufacturability can be obtained, and it can be ensured that the microwaves reflected by the arc-shaped protrusion 205 can be uniformly distributed in the heating cavity C.

[0091] Furthermore, the inner shell assembly 20 is also provided with a vent hole, which is located on the arc surface of a portion of the arc protrusion 205.

[0092] When vent holes are stamped on the inner wall 201, the vent hole area may be deformed by stress, affecting the appearance. By setting the vent hole on the arc surface of the heat dissipation protrusion, the vent hole is processed at the same time as the arc protrusion 205 is stamped, and the deformation that may occur when processing the vent hole is transformed into the deformation of the arc surface, thus ensuring the overall aesthetics of the inner wall 201.

[0093] Furthermore, the diameter of the arc-shaped protrusion 205 with the exhaust port is larger than the diameter of other arc-shaped protrusions 205. Since the surface area of ​​the arc-shaped protrusion 205 with the exhaust port is partially occupied by the exhaust port, in order to ensure the reflection efficiency of the arc-shaped protrusion 205, the diameter of the arc-shaped protrusion 205 with the exhaust port is set to be larger than the diameter of other arc-shaped protrusions 205.

[0094] A second aspect of the present invention also provides a cooking utensil 100, which includes a shell 10 and an inner shell assembly 20 according to the first aspect of the present invention. The inner wall of the inner shell assembly 20 forms a heating cavity for holding food, and a heating tube 30 is disposed in the heating cavity.

[0095] In this embodiment, the cooking appliance 100 has all the technical effects of the inner shell component 20 of the first aspect of the present invention, which will not be described in detail here.

[0096] Furthermore, the cooking appliance 100 also has a lid with heat dissipation protrusions 202, so that heat waves emitted onto the lid can be dissipated to the interior of the heating cavity C through the heat dissipation protrusions 202.

[0097] The above description is merely a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. An inner shell assembly of a cooking utensil, characterized in that, Heating tubes are provided at the top and / or bottom of the inner shell assembly. The inner wall of the inner shell assembly forms the heating cavity of the cooking appliance. The inner wall is made of a high-reflectivity material and / or coated with a high-reflectivity coating. Multiple heat dissipation protrusions extend from the inner wall into the heating cavity. The arc surface of the heat dissipation protrusions is parabolic or spherical. The multiple heat dissipation protrusions are evenly distributed and can be penetrated by microwaves. Each heat dissipation protrusion has a heat dissipation cavity inside. The inner shell assembly also includes a heating element that emits heat waves into the heating cavity. The heating element is provided in each heat dissipation cavity. The heat waves generated by the heating element are evenly scattered into the heating cavity through the multiple heat dissipation protrusions. The heat waves emitted by the heating element are evenly scattered into the heating cavity after being reflected by the multiple heat dissipation protrusions. The heat waves include microwaves.

2. The inner shell assembly of the cooking appliance according to claim 1, characterized in that, The plurality of heat dissipation protrusions include annular protrusions, annular heat dissipation cavities are formed within the annular protrusions, and the heating element includes annular heating elements disposed within the annular heat dissipation cavity.

3. The inner shell assembly of the cooking appliance according to claim 1, characterized in that, The inner wall is integrally formed with the plurality of heat dissipation protrusions, and the side of the inner wall opposite to the heating cavity forms a plurality of processing ports for the plurality of heat dissipation protrusions and a plurality of heat insulation elements that seal the plurality of processing ports.

4. The inner shell assembly of the cooking appliance according to claim 1, characterized in that, The high-reflectivity coating that avoids the multiple heat dissipation protrusions includes a transparent coating, a film layer, a PET layer, and a weather-resistant layer distributed from the outside to the inside.

5. The inner shell assembly of the cooking appliance according to claim 1, characterized in that, The inner wall is provided with a first heat insulation layer composed of inorganic materials or organic polymer materials. The first heat insulation layer is arranged to avoid the plurality of heat dissipation protrusions, and the first heat insulation layer is coated with the high reflectivity coating.

6. The inner shell assembly of the cooking appliance according to claim 1, characterized in that, The inner shell assembly includes a metal inner shell and a low thermal conductivity coating formed of inorganic or organic polymer material applied to the inner wall of the metal inner shell. The low thermal conductivity coating is disposed away from the plurality of heat dissipation protrusions, and the high reflectivity coating is applied to the low thermal conductivity coating.

7. The inner shell assembly of the cooking appliance according to claim 1, characterized in that, The inner shell assembly includes a heat insulation plate and a metal inner shell. The heat insulation plate is disposed on the inner wall of the metal inner shell, avoiding the position of the plurality of heat dissipation protrusions. The heat insulation plate is coated with the high reflectivity coating.

8. The inner shell assembly of the cooking appliance according to claim 7, characterized in that, The heat insulation plate is embedded in the inner wall of the metal inner shell, and the heat insulation plate is installed in the cooking appliance through the metal inner shell.

9. The inner shell assembly of the cooking appliance according to claim 1, characterized in that, Heating tubes are provided at the top and / or bottom of the inner shell assembly. The top of the inner shell assembly is also provided with a plurality of arc-shaped protrusions that reflect heat waves into the heating cavity. The plurality of arc-shaped protrusions are made of a high reflectivity material and / or the plurality of arc-shaped protrusions are coated with the high reflectivity coating.

10. The inner shell assembly of the cooking appliance according to any one of claims 1 to 9, characterized in that, The high reflectivity material includes at least one of mirror aluminum or mirror stainless steel.

11. A cooking utensil, characterized in that, The cooking appliance includes an outer shell and an inner shell assembly of the cooking appliance according to any one of claims 1 to 10.

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