CN114680654A

CN114680654A - Inner shell assembly of cooking utensil and cooking utensil with same

Info

Publication number: CN114680654A
Application number: CN202011641972.0A
Authority: CN
Inventors: 孙炎军; 陈武忠; 唐相伟; 周福昌
Original assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Current assignee: Midea Group Co Ltd; Guangdong Midea Kitchen Appliances Manufacturing Co Ltd
Priority date: 2020-12-31
Filing date: 2020-12-31
Publication date: 2022-07-01

Abstract

The invention relates to the technical field of household appliances, in particular to an inner shell assembly of a cooking appliance and the cooking appliance with the inner shell assembly. The invention aims to solve the technical problems of large heat loss and slow temperature rise of the existing cooking utensil. To this end, the invention provides an inner shell assembly of a cooking appliance, wherein the inner wall of the inner shell assembly forms a heating cavity for placing food in the cooking appliance, and the inner wall of the inner shell assembly is made of a material with a heat conductivity coefficient of 0 w/m.k-5 w/m.k. According to the invention, the heat conductivity coefficient of the inner wall of the inner shell assembly is set to be 0 w/m.k-5 w/m.k, so that the heat absorption of the inner wall of the inner shell assembly in the heating cavity is reduced, the heat loss of the cooking utensil is reduced, the temperature rise speed of the cooking utensil in the initial working stage is improved, and specifically, compared with the prior art that the heating cavity is insulated through the insulating layer on the outer wall side of the heating cavity, the heat absorption of the cavity wall of the heating cavity in the heating cavity is reduced fundamentally by insulating the heating cavity through the inner wall of the heating cavity.

Description

Inner shell assembly of cooking utensil and cooking utensil with same

Technical Field

The invention relates to the technical field of household appliances, in particular to an inner shell assembly of a cooking appliance and the cooking appliance with the inner shell assembly.

Background

This section provides background information related to the present disclosure only and is not necessarily prior art.

When a user uses a cooking appliance for baking, in order to improve the baking effect of food, the cooking appliance needs to be preheated in advance, the preheating process takes about 5-10 minutes, and the cooking appliance has the defects of time consumption, energy consumption and the like in the preheating process.

In the preheating process, the wall surface of the inner cavity of the cooking utensil can absorb the heat of hot gas in the inner cavity and can bear the heat radiation of the heating tube. The inner wall surface of the traditional cooking utensil is made of metal materials such as stainless steel and galvanized plates, the inner wall surface of the metal materials is high in heat conductivity coefficient and large in heat capacity, and therefore the inner wall surface of the metal materials can absorb a large amount of heat of hot air in the cavity and heat of the heating tube.

The heat loss of inner chamber is slowed down through increasing the thermal resistance layer between inner chamber and dustcoat in order to reduce calorific loss, however, the thermal resistance layer can't prevent the inner chamber to absorb the heat of intracavity steam and the heat of heating tube to lead to intracavity air temperature rise speed slower, that is to say, current cooking utensil is through keeping warm the processing to the inner chamber in the cavity outside, can not solve the problem that the internal face of metal material absorbs the inner chamber heat from the root.

Disclosure of Invention

The invention aims to solve the technical problems of high heat loss and slow temperature rise of cooking appliances at least to a certain extent.

In order to achieve the above object, the present invention provides an inner shell assembly of a cooking appliance, wherein an inner wall of the inner shell assembly defines a heating cavity for placing food in the cooking appliance, and the inner wall of the inner shell assembly is made of a material having a thermal conductivity of 0 w/m.k-5 w/m.k.

The invention reduces the heat absorbed by the inner wall of the inner shell assembly in the heating cavity by setting the heat conductivity coefficient of the inner wall of the inner shell assembly to be 0 w/m.k-5 w/m.k, thereby reducing the heat loss of the cooking utensil and improving the temperature rise speed of the cooking utensil in the initial working period. Specifically, keep warm to the heating chamber through the heat preservation of the outer wall side of heating chamber among the prior art, this application keeps warm to the heating chamber through the inner wall in heating chamber, reduces the heat in the chamber wall absorption heating chamber of heating chamber from the root.

In addition, the inner shell assembly of the cooking appliance according to the present invention may further have the following additional technical features:

according to one embodiment of the present invention, the inner wall of the inner shell assembly comprises a first insulating layer composed of an inorganic material or an organic polymer material, the first insulating layer enclosing a heating cavity within the cooking appliance.

According to one embodiment of the invention, the first insulating layer comprises one of a ceramic insulating layer, a glass insulating layer, a polytetrafluoroethylene insulating layer, a polyimide insulating layer, or a polybenzimidazole insulating layer.

According to one embodiment of the present invention, an inner can assembly includes a heat insulation plate disposed on an inner wall of a metal inner can and a metal inner can, the heat insulation plate enclosing a heating cavity within a cooking appliance.

According to an embodiment of the present invention, a heat insulation plate is embedded to an inner wall of a metal inner case, and the heat insulation plate is installed into a cooking appliance through the metal inner case.

According to one embodiment of the invention, the thickness threshold value of the heat insulation plate is 1mm-10mm, and the metal inner shell is provided with a mounting groove or a hollow frame for mounting the heat insulation plate.

According to one embodiment of the invention, the outer wall of the heat insulation board is provided with a plug, the inner wall of the metal inner shell is provided with a slot matched with the plug, and the heat insulation board is mounted on the metal inner shell through the plug and the slot.

According to one embodiment of the invention, the inner shell assembly includes a secondary insulation layer disposed on an outer wall of the metal inner shell.

According to one embodiment of the present invention, an inner case assembly includes a metallic inner case and a low thermal conductive coating formed of an inorganic material or an organic polymer material applied to an inner wall of the metallic inner case, the low thermal conductive coating surrounding a heating cavity within a cooking appliance.

The second aspect of the invention also provides a cooking appliance comprising an outer shell and an inner shell assembly of the cooking appliance according to the first aspect of the invention, the inner wall of the inner shell assembly enclosing a heating cavity in which food is placed, and a heating element being disposed within the heating cavity.

Drawings

Various other advantages and benefits will become apparent to those of ordinary skill in the art upon reading the following detailed description of the preferred embodiments. The drawings are only for purposes of illustrating the preferred embodiments and are not to be construed as limiting the invention. Also, like reference numerals are used to refer to like parts throughout the drawings. In the drawings:

fig. 1 is a schematic structural view of a cooking appliance according to a first embodiment of the present invention;

fig. 2 is a schematic structural view of a cooking appliance according to a second embodiment of the present invention;

fig. 3 is a schematic structural view of a cooking appliance according to a third embodiment of the present invention.

Wherein the reference numbers are as follows:

100. a cooking appliance;

10. a housing;

20. an inner shell assembly; 21. a first insulating layer; 22. a second insulating layer; 23. a heat insulation plate; 24. a metal inner shell; 25. a low thermal conductivity coating;

30. a heating element;

C. a chamber is heated.

Detailed Description

Exemplary embodiments of the present disclosure will be described in more detail below 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 may be embodied in various forms and should not be limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will 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 be used in an oven, but is also applicable to other cooking appliances such as a steam cooking appliance, and such an adjustment belongs to the protection scope of the inner shell assembly of the cooking appliance of the present invention.

It is to be understood that the terminology used herein is for the purpose of describing particular example embodiments only, and is not intended to be limiting. As used herein, the singular forms "a", "an" and "the" may be intended to include the plural forms as well, unless the context clearly indicates otherwise. The terms "comprising," "including," and "having" are inclusive and therefore specify the presence of stated features, elements, and/or components, but do not preclude the presence or addition of one or more other features, elements, components, and/or groups thereof.

In the description of the present invention, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be construed broadly, e.g., as meaning a fixed connection, a detachable connection, or an integral connection; may be directly connected or indirectly connected through an intermediate. The specific meaning of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first", "second", may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

For convenience of description, spatially relative terms, such as "on," "center," "front," "back," "inner," "side," "outer," and the like, may be used herein to describe one element or feature's relationship to another element or feature as illustrated in the figures. This spatially relative relationship is intended to encompass different orientations of the mechanism in use or operation in addition to the orientation depicted in the figures. For example, if the mechanism in the figures is turned over, elements described as "below" or "beneath" other elements or features would then be oriented "above" or "over" the other elements or features. Thus, the example term "below … …" can include both an orientation of above and below. The mechanism may be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

As shown in fig. 1, 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 the same, the following description is first made in detail by the cooking appliance 100 provided by the present invention, wherein the cooking appliance 100 according to the present invention may be an oven or a steam oven, according to an embodiment of the present invention, the cooking appliance 100 includes an outer shell 10 and the inner shell assembly 20 disposed in the outer shell 10, an inner wall of the inner shell assembly 20 forms a heating cavity C for containing food in the cooking appliance 100, a heating element 30 (for example, a heating tube or a steam injection element communicating with a steam generator) is disposed in the heating cavity C, the heating element 30 exchanges heat with air in the heating cavity C by means of heat radiation, and the heated air heats food in the heating cavity C by means of heat conduction.

As will be understood by those skilled in the art, during the heat exchange between the heating element 30 and the air in the heating cavity C and during the heat exchange between the air in the heating cavity C and the food in the heating cavity C, the inner shell assembly 20 absorbs a part of the heat and emits the absorbed heat to the outside of the cooking appliance 100 through the outer shell 10, which results in energy loss and heating efficiency reduction of the cooking appliance 100, especially in the early stage of baking the food, the heating cavity C of the cooking appliance 100 needs to be preheated in advance, and if the inner shell assembly 20 absorbs the heat in the heating cavity C during the preheating process, the cooking appliance 100 consumes time and energy during the preheating process.

In order to reduce the energy loss of the cooking appliance 100 and improve the heating efficiency of the cooking appliance 100, the embodiment of the present application provides that the inner shell assembly 20 is provided with an inner wall with a low thermal conductivity, for example, the threshold value of the thermal conductivity of the inner wall of the inner shell assembly 20 is 0w/m · k-5w/m · k, and the inner wall of the inner shell assembly 20 also has a high temperature resistance, for example, the threshold value of the high temperature resistance of the inner wall of the inner shell assembly 20 is 200 ℃ -600 ℃, and the inner wall made of a material with a low thermal conductivity can not only reduce the heat absorption of the inner shell assembly 20 into the heating cavity C, but also reflect the light emitted by the heating element 30 such as the heating tube through the inner wall, and achieve the effect of heating the food in the heating cavity C through the reflected light.

It should be noted that, the inner casing assembly 20 described in the above embodiments is provided with an inner wall having a low thermal conductivity, including the inner wall of the inner casing assembly 20 is made of a low thermal conductive material, and further including the inner wall of the inner casing assembly 20 is coated with a low thermal conductive coating 25, both of the above embodiments are for reducing the heat dissipated by the heating element absorbed by the inner casing assembly 20, and both embodiments belong to the protection range of the inner wall of the inner casing assembly 20 in the embodiment of the present application, and the specific embodiment of the inner wall of the inner casing assembly 20 will be described in detail below. In addition, the low thermal conductivity in the above embodiments is relative to the inner wall of the existing cooking utensil 100, and it can be understood by those skilled in the art that the inner wall of the existing cooking utensil 100 is usually a metal inner wall, the thermal conductivity of the metal inner wall is generally 40-80 w/m.k, and the threshold value of the thermal conductivity of the inner wall of the inner shell assembly 20 provided in the embodiments of the present application is 0 w/m.k-5 w/m.k.

According to a first embodiment of the invention: as shown in fig. 1, the inner wall of the inner casing assembly 20 includes a first heat insulating layer 21 made of an inorganic material or an organic polymer material, and the first heat insulating layer 21 forms a heating cavity C in the cooking appliance 100.

In this embodiment, the outline of the first thermal insulation layer 21 corresponds to the outline of the outer shell 10, and for example, the shape of the outer shell 10 is a rectangular box structure, the first thermal insulation layer 21 is also a rectangular box structure, the heating cavity C of the cooking utensil 100 is formed by the inner space surrounded by the first thermal insulation layer 21, further, the first thermal insulation layer 21 has not only low thermal conductivity but also high temperature resistance, the first thermal insulation layer 21 is made of a hard material with low thermal conductivity, low heat capacity and high temperature resistance, for example, the first thermal insulation layer 21 includes one of a ceramic thermal insulation layer, a glass thermal insulation layer, a PTFE (polytetrafluoroethylene) thermal insulation layer, a PI (polyimide) thermal insulation layer or a PBI (polybenzimidazole) thermal insulation layer, so that the thermal conductivity of the first thermal insulation layer 21 reaches 0w/m · k-5w/m · k, and the high temperature resistance threshold is 200 ℃ -600 ℃, thereby reducing energy loss of the cooking appliance 100 and improving heating efficiency of the cooking appliance 100.

Further, in order to improve the heat exchange capacity between inner shell assembly 20 and shell 10, the embodiment of this application still provides and sets up second heat preservation 22 at the outer wall of first heat preservation 21, further reduce the heat in the heating chamber C through second heat preservation 22 and pass through inner shell assembly 20 and transmit to shell 10 on, second heat preservation 22 can set up to the material and the structure the same with first heat preservation 21, after first heat preservation 21 absorbs the heat in the heating chamber C, second heat preservation 22 can reduce heat exchange capacity and heat exchange efficiency between first heat preservation 21 and shell 10, carry out heat retaining effect to this realization heating chamber C.

According to a second embodiment of the invention: as shown in fig. 2, the inner casing assembly 20 includes a heat insulation plate 23 and a metal inner casing 24, the heat insulation plate 23 is disposed on an inner wall of the metal inner casing 24, and the heat insulation plate 23 encloses a heating cavity in the cooking appliance 100.

In the present embodiment, the metal inner shell 24 serves to support and mount the heating element 30, that is, the heating cavity is supported by the metal inner shell 24, and the heat insulation plate 23 serves only to insulate heat, so as to reduce the risk of the heat insulation plate 23 being damaged by an 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 hard material with low thermal conductivity, low thermal capacity and high temperature resistance, the heat insulation plate 23 may be one of a ceramic heat insulation plate, a glass heat insulation plate, a PTFE heat insulation plate, a PI heat insulation plate or a PBI heat insulation plate, the difference between the heat insulation plate 23 and the first heat insulation layer 21 in the first embodiment of the present embodiment is that the metal inner shell 24 is disposed on the outer wall of the heat insulation plate 23, the heat insulation plate 23 may be disposed in close contact with the inner wall of the metal inner shell 24, and may be spaced apart from the metal inner shell 24, and the heat insulation plate 23 may be disposed in close contact with the inner wall of the metal inner shell 24, so as to improve the overall structural strength and the inner shell assembly 20 and improve the overall structural strength of the inner shell assembly 20 Stability, the gap between the heat shield plate 23 and the metal inner skin 24 can further improve the heat insulation performance of the inner skin assembly 20 when the heat shield plate 23 and the metal inner skin 24 are spaced apart, and the specific distribution of the heat shield plate 23 and the metal inner skin 24 will be described in detail below.

In some embodiments of the present invention, the threshold thickness of the heat insulation board 23 is 1mm to 10mm, the metal inner shell 24 is provided with a mounting groove or a hollow frame for mounting the heat insulation board 23, specifically, the thickness of the metal inner shell 24 is greater than 10mm, the inner wall of the metal inner shell 24 is provided with one or more mounting grooves matched with the heat insulation board 23, the heat insulation board 23 is one or more, and one heat insulation board 23 is disposed in each mounting groove, so that the heat insulation board 23 and the metal inner shell 24 distributed in this way not only improves the heat insulation effect of the inner shell assembly 20, but also improves the overall structural strength of the inner shell assembly 20, further, in other embodiments of the present invention, the mounting groove may also penetrate through the metal inner shell 24, so that a hollow frame is formed in the metal inner shell 24, and the heat insulation board 23 is located in the hollow frame and mounted to the frame of the hollow frame.

In some embodiments of the present invention, in order to facilitate detachment and maintenance of the heat insulation board 23, embodiments of the present application disclose that the heat insulation board 23 is detachably mounted on the metal inner shell 24, specifically, a plug (not shown) is disposed on an outer wall of the heat insulation board 23, the plug may be a metal clamping sheet, a slot (not shown) matched with the plug is disposed on an inner wall of the metal inner shell 24, the heat insulation board 23 is mounted on the metal inner shell 24 through the plug and the slot, and further, four heat insulation boards 23 may be disposed on inner walls around the metal inner shell 24, so as to facilitate independent detachment and maintenance of the damaged heat insulation board 23. After the heat insulation plate 23 is mounted on the metal inner shell 24, an insulation gap is formed between the heat insulation plate 23 and the metal inner shell 24, and the insulation gap between the heat insulation plate 23 and the metal inner shell 24 can perform an insulation function, thereby improving the insulation effect of the inner shell assembly 20.

In order to further improve the heat insulation effect of the inner shell assembly 20, the embodiment of the application further provides that a second heat insulation layer 22 is arranged on the outer wall of the metal inner shell 24, the second heat insulation layer 22 can be made of the same material and have the same structure as the first heat insulation layer 21 in the first embodiment, and after 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 amount and the heat exchange efficiency among the heat insulation plate 23, the metal inner shell 24 and the outer shell 10, so that the heat insulation effect of the heating cavity C is realized.

According to a third embodiment of the invention: as shown in fig. 3, the inner case assembly 20 includes a metal inner case 24 and a low thermal conductive coating 25 formed of an inorganic material or an organic polymer material applied to an inner wall of the metal inner case 24, and the low thermal conductive coating 25 surrounds a heating cavity within the cooking appliance 100.

In this embodiment, the low thermal conductive coating 25 may be made of a high temperature resistant thermal conductive coating, such as a ceramic glaze, and the low thermal conductive coating 25 may be directly sprayed on the inner wall of the metal inner shell 24 to form a hard ceramic glaze crust, so as to reduce the heat exchange amount between the metal inner shell 24 and the high temperature hot gas in the heating cavity C, increase the temperature rising speed of the heating cavity C in the cooking appliance 100, and reduce the heat loss of the cooking appliance 100 during the heating process.

Finally, the inner wall of the inner housing assembly 20 provided in the above three embodiments is made of a material with low thermal conductivity, low heat capacity and high reflectivity, which not only can reduce the heat absorption of the inner wall of the inner housing assembly 20 into the heating cavity C, but also can reflect the infrared light emitted by the heating elements such as the heating tube, thereby increasing the central temperature of the inner housing assembly 20. The inner shell assembly 20 may be a rectangular structure or an arc-shaped top structure, and the front end of the inner shell assembly 20 is provided with an opening for taking and placing food, the inner walls with low thermal conductivity in the three embodiments are mainly distributed on the inner walls at the two sides and the inner wall at the top of the inner shell assembly 20, and when a heating element needs to be installed in the inner shell assembly 20, the inner walls at the two sides or the inner wall at the top of the inner shell assembly 20 are also provided with an installation structure for installing the heating element.

It should be noted that the above three embodiments mainly illustrate the structures related to the main invention of the present application, and further, the structures provided by the above three embodiments can all solve the technical problems existing in the prior art, in order to achieve better heat preservation and reduce energy loss, without conflict, the structures disclosed by the above three embodiments can be combined to achieve better heat preservation and reduce energy loss of the inner shell assembly 20, for example, the liner assembly 20 can be configured to include a partition 23, a metal inner shell 24 and a second heat preservation layer 22, which are sequentially distributed from inside to outside, wherein the inner walls at the two sides and the top of the metal inner shell 24 are configured as a hollow frame structure, the partition 23 is embedded into the hollow frame and mounted on the frame of the hollow frame, the frame inner wall of hollow frame has scribbled low heat conduction coating 25, and second heat preservation 22 sets up in the outer wall of metal inner shell 24, and wherein, can be provided with the clearance between baffle 23, metal inner shell 24 and the second heat preservation 22, perhaps packs into compact structure with baffle 23, metal inner shell 24 and second heat preservation 22 compress tightly, and the inner bag subassembly 20 of this structure belongs to the protection scope of this application embodiment.

The second aspect of the present invention also provides a cooking appliance 100, the cooking appliance 100 includes an outer shell 10 and an inner shell assembly 20 of the cooking appliance 100 according to the first aspect of the present invention, an inner wall of the inner shell assembly 20 encloses a heating cavity C for storing food, and a heating element 30 is disposed in the heating cavity C.

In the present embodiment, the cooking appliance 100 may be an oven or a steam oven, and the cooking appliance 100 has all the technical effects of the inner shell assembly 20 of the first aspect of the present invention, which will not be described herein again.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. An inner shell assembly for a cooking appliance, wherein an inner wall of the inner shell assembly defines a heating cavity for receiving food within the cooking appliance, and wherein the inner wall of the inner shell assembly is formed from a material having a thermal conductivity of from 0 w/m-k to 5 w/m-k.

2. An inner housing assembly of a cooking appliance as claimed in claim 1, wherein the inner wall of the inner housing assembly comprises a first insulating layer of inorganic or organic polymeric material, the first insulating layer enclosing the heating cavity within the cooking appliance.

3. An inner shell assembly of a cooking appliance as in claim 2, wherein the first insulating layer comprises one of a ceramic insulating layer, a glass insulating layer, a polytetrafluoroethylene insulating layer, a polyimide insulating layer, or a polybenzimidazole insulating layer.

4. An inner shell assembly of a cooking appliance as in claim 1, wherein the inner shell assembly comprises a metal inner shell and a heat insulation board, wherein the heat insulation board is arranged on the inner wall of the metal inner shell, and the heat insulation board encloses the heating cavity in the cooking appliance.

5. An inner casing assembly of a cooking appliance according to claim 4, wherein the heat insulation board is embedded to an inner wall of the metal inner casing, and the heat insulation board is installed into the cooking appliance through the metal inner casing.

6. An inner shell assembly of a cooking appliance as claimed in claim 4, wherein the heat insulating plate has a thickness threshold of 1mm to 10mm, and the metal inner shell is provided with a mounting groove or a hollow frame for mounting the heat insulating plate.

7. An inner casing assembly of a cooking appliance as set forth in claim 4, wherein the heat insulation board is provided at an outer wall thereof with a plug, and an inner wall thereof with a slot engaged with the plug, the heat insulation board being mounted to the inner metal casing through the plug and the slot.

8. An inner shell assembly of a cooking appliance as claimed in claim 4, wherein the inner shell assembly comprises a second layer of insulation provided to an outer wall of the inner metal shell.

9. An inner shell assembly of a cooking appliance as claimed in claim 1, wherein the inner shell assembly comprises a metallic inner shell and a low thermal conductivity coating of inorganic or organic polymeric material applied to an inner wall of the metallic inner shell, the low thermal conductivity coating surrounding the heating cavity within the cooking appliance.

10. A cooking appliance comprising an outer shell and an inner shell assembly of the cooking appliance of any one of claims 1 to 9, the inner walls of the inner shell assembly enclosing a heating chamber in which food is placed and within which heating elements are disposed.