Food heat preservation device
By designing a food insulation device that stacks multiple containers inside an insulation cover, and utilizing vacuum or air layer insulation, the problem of rapid cooling of multiple dishes is solved, achieving stable insulation and energy-saving effects.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- WUHAN SUPOR COOKWARE
- Filing Date
- 2025-05-29
- Publication Date
- 2026-05-01
AI Technical Summary
There is a lack of specialized products on the market for keeping multiple cooked dishes warm, and cooked dishes tend to cool down quickly.
Design a food insulation device, including multiple containers and an insulation cover. The containers are stacked inside the insulation cover, which slows down heat dissipation. The stacked containers are secured by limiting grooves and limiting rings. The insulation layer is a vacuum layer or an air layer to prevent heat transfer.
It enables long-term heat preservation of multiple cooked foods, reduces heat loss, has a stable container that is not easy to slip, is simple and convenient to operate, and is energy-saving and environmentally friendly.
Smart Images
Figure CN224179591U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of kitchen utensils technology, specifically to a food warming device. Background Technology
[0002] Currently, there is a lack of specialized products on the market for keeping cooked food warm when cooking multiple dishes in the kitchen, and there is an urgent need to address the pain point that cooked food cools down quickly after being removed from the pot. Utility Model Content
[0003] Therefore, the purpose of this invention is to provide a food warming device to at least solve the problem of cooked food cooling down quickly in related technologies.
[0004] A first aspect of this utility model provides a food warming device, comprising: a plurality of containers that can be stacked sequentially from bottom to top; and a warming cover that forms a warming space inside the warming cover and can be placed over the plurality of containers so that the plurality of containers are placed inside the warming space.
[0005] The food warming device provided in this embodiment includes containers for holding cooked rice, dishes, soup, and other food items. By stacking multiple containers, lateral space can be saved, and multiple containers can be placed within a single insulated cover. Placing multiple containers within the insulated space created by the cover slows heat dissipation, reducing the cooling rate of the food within the containers and achieving the function of keeping multiple cooked foods warm. This ensures that hot rice and dishes remain warm for an extended period, effectively solving the problem of the first-cooked dishes cooling down when cooking multiple items. Furthermore, the food warming device provided in this embodiment can keep cooked food warm without additional heating, making it convenient to use and energy-efficient.
[0006] Understandably, a thermal insulation cover is designed to slow down the transfer of heat between the inside and outside and to maintain a stable temperature inside the cover as much as possible.
[0007] In some embodiments, a lateral limiting portion is provided on the outer surface of the bottom wall of each container and / or the top of the side wall of the container. The lateral limiting portion can limit the lateral displacement of the upper container relative to the lower container. With this configuration, the lateral limiting portion can limit the lateral displacement of the upper container relative to the lower container, making the stacking of multiple containers more stable and less likely to slide and fall laterally.
[0008] In some embodiments, the lateral limiting portion includes a limiting groove disposed on the outer surface of the bottom wall of the container, the limiting groove being recessed upward and disposed along the outer peripheral edge of the container; the top of the side wall of the lower container can be inserted into the limiting groove of the upper container to support the upper container.
[0009] In these embodiments, by inserting the top of the side wall of the lower container into the limiting groove of the upper container, the side wall of the lower container can stop the upper container in the lateral direction, preventing lateral sliding between the stacked containers and reducing the risk of the upper container falling due to lateral sliding. Furthermore, the limiting groove has a simple structure, which is beneficial for manufacturing.
[0010] In some embodiments, the depth of the limiting groove is greater than or equal to 2 mm. Setting a deeper limiting groove can improve the stability of stacked containers. Therefore, a limiting groove depth of greater than or equal to 2 mm can prevent lateral sliding between stacked containers and reduce the risk of the upper container falling due to lateral sliding.
[0011] In some embodiments, the depth of the limiting groove is less than or equal to 50% of the height of the container. The depth of the limiting groove is related to the capacity of the container below. The greater the depth of the limiting groove, the smaller the remaining capacity of the container below when stacked. Based on this, setting the depth of the limiting groove to less than or equal to 50% of the height of the container can leave as much capacity as possible for the container below, without affecting the holding of food that needs to be kept warm.
[0012] In some embodiments, the insulation cover includes a cover body, with an insulation space disposed inside the cover body. The cover body includes an outer layer, an inner layer, and an insulation layer disposed between the outer and inner layers. This arrangement allows the inner and outer layers to protect the insulation layer, preventing it from being damaged by external forces. The material in the insulation layer is typically a poor conductor of heat, effectively preventing heat from being transferred from the inner layer to the outer layer or from the external environment into the interior of the insulation cover via conduction. This maintains a stable temperature inside the insulation cover, reduces heat loss or absorption, and achieves a good insulation effect.
[0013] In some embodiments, the insulation layer is a vacuum layer. A vacuum layer provides highly efficient thermal insulation because it contains almost no gaseous medium, effectively preventing heat loss from the inside of the insulation cover to the outside, or from the outside to the inside, thus achieving excellent insulation. Furthermore, a vacuum layer also offers advantages such as light weight, good stability, long service life, and high space utilization. It also provides good thermal insulation performance: air is a poor conductor of heat, which can, to some extent, prevent heat transfer.
[0014] In some embodiments, the insulation layer is an air layer. When there is an air layer in the middle of the insulation cover, heat needs to be transferred through the thermal conduction and convection of air molecules. However, the thermal conductivity of air is relatively low, and convection is also restricted by the structure of the air layer, thereby slowing down the loss or transfer of heat and playing a certain role in insulation. In addition, the insulation layer being an air layer also has the advantages of lower cost, higher safety, and ease of maintenance and replacement.
[0015] In some embodiments, the insulation layer is a thermal insulation material layer. The thermal insulation material layer may be made of a material with low thermal conductivity; for example, alternatively, materials with low thermal conductivity such as foam, rock wool, aerogel, etc.
[0016] In some embodiments, the bottom of the cover body is provided with an opening for the container to enter and exit the insulation space. The opening of the insulation cover is placed downwards on the support surface to form an insulation space between the cover body and the support surface. With this configuration, the insulation cover, when fastened to the support surface, secures the container inside, thus achieving the function of keeping the food in the container warm, which is convenient to operate. Removing the insulation cover reveals the container, making it easy for people to access. Compared with placing food in an insulated box or other sealed container, the food insulation device proposed in this embodiment does not require opening complex lids or doors; simply opening the insulation cover is sufficient, making operation simple and convenient.
[0017] In some embodiments, the insulation cover also includes a handle disposed on the outer surface of the cover body. The handle facilitates the handling of the insulation cover, making the placement and removal of the insulation cover simpler and more convenient.
[0018] In some embodiments, a handle is located at the top of the cover body, and a recessed avoidance area, which is a circular recessed area, is provided on the top wall of the cover body below the handle. Positioning the handle at the top of the cover body helps maintain the stability of the insulation cover during removal and placement, allowing it to be lifted with one hand for easier operation. Furthermore, the space between the lower surface of the handle and the top wall of the cover body allows the operator's hand to reach into this space to grip the handle and easily hold the insulation cover. Therefore, the space between the lower surface of the handle and the top wall of the cover body should be large enough to accommodate fingers. By providing a recessed avoidance area on the top wall of the cover body for the operator's fingers to pass through and grip the handle, the upward protrusion of the handle is reduced, thereby reducing the overall height of the insulation cover and facilitating storage. Furthermore, setting the avoidance area as a circular recessed area ensures that the width of the avoidance area is large enough to allow the operator's fingers to pass through and grip the handle.
[0019] In some embodiments, the insulation cover is a metal insulation cover. Metal insulation covers offer advantages such as durability, safety, hygiene, ease of cleaning, aesthetics, and environmental recyclability. Especially when the insulation layer of the cover is a vacuum layer, the high strength and hardness of metal allow it to withstand greater external forces, enabling it to resist atmospheric pressure after vacuuming without deformation. Furthermore, in daily use, whether from accidental impacts or in complex environments, metal insulation covers are less prone to deformation or damage, thus better protecting the internal vacuum layer and extending the lifespan of the insulation cover. Moreover, metal materials offer advantages in processing and sealing, better matching the sealing requirements of the vacuum layer. The connections between metal parts can be highly sealed through welding, riveting, etc., effectively preventing air leakage into the vacuum layer and ensuring the integrity of the vacuum layer and the stability of the insulation effect.
[0020] Other aspects and / or advantages of the present invention will be set forth in part in the description which follows, and others will be clear from the description or may be learned by practice of the present invention. Attached Figure Description
[0021] The above and other objects and features of this utility model will become clearer from the following description of embodiments in conjunction with the accompanying drawings, in which:
[0022] Figure 1 A cross-sectional structural schematic diagram of a food warming device according to an embodiment of this application is shown along the longitudinal direction.
[0023] Figure 2 This invention provides a schematic diagram of the structure of a food warming device in its unassembled state according to an embodiment of the present application.
[0024] Figure 3 A schematic diagram of the structure of a food warming device according to an embodiment of this application, showing the separation of the container and the warming cover, is shown.
[0025] Explanation of icon numbers:
[0026] 10 Container, 110 Limiting groove, 20 Insulation cover, 210 Insulation space, 220 Cover body, 221 Inner layer, 222 Outer layer, 223 Insulation layer, 230 Handle, 240 Avoidance area, 30 Support surface. Detailed Implementation
[0027] The following detailed embodiments are provided to aid the reader in gaining a comprehensive understanding of the methods, apparatus, and / or systems described herein. However, various changes, modifications, and equivalents of the methods, apparatus, and / or systems described herein will become apparent upon understanding this disclosure. For example, the order of operations described herein is merely illustrative and is not limited to those orders set forth herein, but may be changed as will become clear upon understanding this disclosure, except for operations that must occur in a specific order. Furthermore, for clarity and conciseness, descriptions of features known in the art may be omitted.
[0028] The features described herein may be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein are provided only to illustrate some of the many feasible ways of implementing the methods, apparatus, and / or systems described herein, which will become clear upon understanding the disclosure of this application.
[0029] As used herein, the term “and / or” includes any one of the associated listed items and any combination of any two or more.
[0030] Although terms such as “first,” “second,” and “third” may be used herein to describe various components, assemblies, regions, layers, or parts, these components, assemblies, regions, layers, or parts should not be limited by these terms. Rather, these terms are used only to distinguish one component, assembly, region, layer, or part from another. Thus, without departing from the teaching of the examples described herein, the first component, first assembly, first region, first layer, or first part referred to as the first component, first assembly, first region, first layer, or first part may also be referred to as the second component, second assembly, second region, second layer, or second part.
[0031] In the specification, when an element such as a layer, region, or substrate is described as being "on" another element, "connected to," or "bonded to" another element, the element may be directly "on" another element, directly "connected to," or "bonded to" the other element, or one or more other elements may be present in between. Conversely, when an element is described as being "directly on" another element, "directly connected to," or "directly bonded to" another element, no other elements may be present in between.
[0032] The terminology used herein is for the purpose of describing various examples only and is not intended to limit disclosure. Unless the context clearly indicates otherwise, the singular form is intended to include the plural form as well. The terms “comprising,” “including,” and “having” indicate the presence of the described features, quantities, operations, components, elements, and / or combinations thereof, but do not preclude the presence or addition of one or more other features, quantities, operations, components, elements, and / or combinations thereof. The term “a plurality” represents any quantity of two or more.
[0033] The directional terms such as "upper," "lower," "left," "right," "top," and "bottom" used in this application are based on the orientation shown in the accompanying drawings and are used only for the convenience of description. They are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the embodiments of this utility model.
[0034] Unless otherwise defined, all terms used herein, including technical and scientific terms, shall have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains after understanding the invention. Unless expressly defined herein, terms such as those defined in a general dictionary shall be interpreted as having a meaning consistent with their meaning in the context of the relevant field and in this invention, and shall not be interpreted in an idealized or overly formalistic manner.
[0035] The following will combine Figures 1 to 3 This invention introduces a food warming device provided by an embodiment of the present invention.
[0036] like Figure 1 , Figure 2 and Figure 3 As shown, a first aspect of the present invention provides a food warming device, comprising: a plurality of containers 10, which can be stacked sequentially from bottom to top; a warming cover 20, the interior of which forms a warming space 210, which can cover the exterior of the plurality of containers 10 so that the plurality of containers 10 are placed inside the warming space 210.
[0037] The food warming device provided in this embodiment includes a container 10 for holding cooked rice, dishes, soup, etc. By stacking multiple containers 10, lateral space can be saved, and multiple containers 10 can be placed inside a warming cover 20. By placing multiple containers 10 within the warming space 210 formed by the warming cover 20, heat dissipation can be slowed down, reducing the cooling rate of the food in the containers 10, thus achieving the function of keeping multiple cooked foods warm. This ensures that hot rice and dishes remain warm for a long time, effectively solving the problem of the first-cooked dishes cooling down when cooking multiple dishes. In addition, the food warming device provided in this embodiment can keep cooked food warm without additional heating, making it convenient to use and energy-saving.
[0038] Understandably, the heat insulation cover 20 is designed to slow down the transfer of heat between the inside and outside and to maintain a stable temperature inside the heat insulation cover 20 as much as possible.
[0039] It is understandable that when multiple containers are stacked, there is enough space between the bottom wall of the lower container and the bottom wall of the adjacent upper container to hold food. This space can be used to hold cooked food, so that the stacked containers have enough space to hold food.
[0040] Furthermore, to improve the stacking stability of multiple containers 10, in some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, each container 10 has a lateral limiting part on the outer surface of its bottom wall and / or the top of its side wall. The lateral limiting part can restrict the lateral displacement of the upper container 10 relative to the lower container 10. With this configuration, the lateral limiting part can restrict the lateral displacement of the upper container 10 relative to the lower container 10, making the stacking of multiple containers 10 more stable and less likely to slide and fall.
[0041] In some embodiments, such as Figure 1 , Figure 2 and Figure 3 As shown, the lateral limiting part includes a limiting groove 110 provided on the outer surface of the bottom wall of the container 10. The limiting groove 110 is recessed upward and is provided along the outer peripheral edge of the container 10. The top of the side wall of the lower container 10 can be inserted into the limiting groove 110 of the upper container 10 to support the upper container 10.
[0042] In these embodiments, by inserting the top of the side wall of the lower container 10 into the limiting groove 110 of the upper container 10, the side wall of the lower container 10 can stop the upper container 10 in the lateral direction, preventing lateral sliding between the stacked containers 10 and reducing the risk of the upper container 10 falling due to lateral sliding. Furthermore, the limiting groove 110 has a simple structure, which is beneficial for manufacturing.
[0043] In some embodiments, the depth of the limiting groove 110 is greater than or equal to 2 mm. Setting a deeper limiting groove 110 can improve the stability of the stacked containers 10. Based on this, the depth of the limiting groove 110 being greater than or equal to 2 mm can prevent lateral sliding between the stacked containers 10 and reduce the risk of the upper container 10 falling due to lateral sliding.
[0044] In some embodiments, the depth of the limiting groove 110 is less than or equal to 50% of the height of the holding container 10. The depth of the limiting groove 110 is related to the capacity of the holding container 10 located below. The greater the depth of the limiting groove 110, the smaller the remaining capacity of the holding container 10 located below when stacked. Based on this, setting the depth of the limiting groove 110 to be less than or equal to 50% of the height of the holding container 10 can leave as much capacity as possible for the holding container 10 located below, without affecting the holding of food that needs to be kept warm.
[0045] In other embodiments, the lateral limiting portion includes a limiting ring connected to the top of the side wall of the container 10. The inner diameter of the limiting ring is larger than the outer diameter of the bottom end of the container 10. The bottom wall of the upper container 10 is inserted into the limiting ring of the lower container 10 and abuts against the top of the side wall of the lower container 10 to support the upper container 10.
[0046] In these embodiments, by setting a limiting ring and inserting the bottom wall of the upper container 10 into the limiting ring of the lower container 10, the limiting ring of the lower container 10 can stop the upper container 10 in the lateral direction, preventing lateral sliding between the stacked containers 10 and reducing the risk of the upper container 10 falling due to lateral sliding. Furthermore, the limiting ring has a simple structure, which is beneficial for manufacturing.
[0047] It is understandable that when the lateral limiting part includes a limiting ring connected to the top of the side wall of the container 10, the height of the limiting ring is greater than or equal to 2mm, which can prevent lateral sliding between the stacked containers 10 and reduce the risk of the container 10 on the upper layer falling due to lateral sliding.
[0048] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat insulation cover 20 includes a cover body 220, and a heat insulation space 210 is disposed inside the cover body 220. The cover body 220 includes an outer layer 222, an inner layer 221, and a heat insulation layer 223 disposed between the outer layer 222 and the inner layer 221. With this arrangement, the inner layer 221 and the outer layer 222 can protect the heat insulation layer 223 and prevent the heat insulation layer 223 from being damaged by external forces. The material in the heat insulation layer 223 is usually a poor conductor of heat, which can effectively prevent heat from being transferred from the inner layer 221 to the outer layer 222 or from the external environment to the interior of the heat insulation cover 20 by conduction, thereby maintaining a stable temperature inside the heat insulation cover 20, reducing heat loss or absorption, and achieving a good heat insulation effect.
[0049] As an example, the insulation layer 223 may optionally be an air layer, a vacuum layer, or a fiberglass layer, rock wool layer, polyurethane foam layer, etc., filled between the inner layer 221 and the outer layer 222, all of which have good thermal insulation effects.
[0050] In some embodiments, the insulation layer 223 is a vacuum layer. A vacuum layer provides highly efficient thermal insulation because it contains almost no gaseous medium, effectively preventing heat loss from the inside of the insulation cover 20 to the outside, or from the outside to the inside, thus achieving excellent insulation. Furthermore, a vacuum layer also has advantages such as light weight, good stability, long service life, and high space utilization. It also provides good thermal insulation performance: air is a poor conductor of heat and can, to a certain extent, prevent heat transfer.
[0051] In some embodiments, the insulation layer 223 is an air layer. When there is an air layer in the middle of the insulation cover 20, heat needs to be transferred through the thermal conduction and convection of air molecules. However, the thermal conductivity of air is relatively low, and convection is also limited by the structure of the air layer, thereby slowing down the loss or transfer of heat and playing a certain role in heat preservation. In addition, the insulation layer 223 being an air layer also has the advantages of low cost, high safety, and easy maintenance and replacement.
[0052] In some embodiments, the insulation layer 223 is a thermal insulation material layer. The thermal insulation material layer can be made of a material with low thermal conductivity. As an example, alternatively, materials with low thermal conductivity include expanded polystyrene (EPS), foam, rock wool, aerogel, etc.
[0053] In some embodiments, such as Figure 1 and Figure 2As shown, the bottom of the cover body 220 has an opening for the container 10 to enter and exit the insulation space 210. The insulation cover 20 is placed on the support surface 30 with the opening facing downwards, thus forming the insulation space 210 between the cover body 220 and the support surface 30. With this arrangement, the insulation cover 20 is fastened to the support surface 30, securing the container 10 inside, thus achieving the function of keeping the food in the container 10 warm, which is convenient to operate. Removing the insulation cover 20 exposes the container 10, making it convenient for people to access. Compared with placing food in an insulated box or other sealed container, the food insulation device proposed in this embodiment does not require opening complex lids or doors; simply opening the insulation cover 20 is sufficient, making operation simple and convenient.
[0054] As an example, the support surface 30 may optionally include a dining table surface, tabletop, or tray, and the heat preservation cover 20 may be attached to the dining table surface, tabletop, or a suitable tray.
[0055] In some embodiments, such as Figure 1 and Figure 2 As shown, the heat insulation cover 20 also includes a handle 230 connected to the cover body 220. The handle 230 is provided on the outer surface of the cover body 220, for example, on the side surface or top of the cover body. Thus, the handle 230 facilitates the handling of the heat insulation cover 20, making the operation of placing and removing the heat insulation cover 20 simpler and more convenient.
[0056] In the example shown in the attached figure, the handle 230 is located on the top of the cover body 220. Positioning the handle 230 on the top of the cover body 220 helps to keep the insulation cover 20 stable during removal and placement, allowing it to be lifted with one hand for easier operation.
[0057] In some embodiments, such as Figure 1 Figure 2 and Figure 3 As shown, a recessed clearance area 240 is provided on the top wall of the cover body 220. The clearance area 240 is a circular recessed area located below the handle 230. The space between the lower surface of the handle 230 and the top wall of the cover body 220 is designed to allow the operator's hand to reach into this space and grip the handle 230 for easy handling of the insulation cover 20. Therefore, the space between the lower surface of the handle 230 and the top wall of the cover body 220 should be large enough to accommodate fingers. By providing a recessed clearance area 240 on the top wall of the cover body 220 for the operator's fingers to pass through and grip the handle 230, the upward protrusion of the handle 230 is reduced, thereby reducing the overall height of the insulation cover 20 and facilitating storage of the cover body 220. Furthermore, designing the clearance area 240 as a circular recessed area ensures that the width of the clearance area 240 is large enough to allow the operator's fingers to pass through and grip the handle 230.
[0058] In some embodiments, the insulation cover 20 is a metal insulation cover 20. The metal insulation cover 20 has advantages such as durability, safety, hygiene, easy cleaning, aesthetics, and environmental recyclability. Especially when the insulation layer 223 of the insulation cover 20 is a vacuum layer, the high strength and hardness of metal allow it to withstand greater external forces, thus resisting atmospheric pressure after vacuuming without deformation. Furthermore, in daily use, whether due to accidental impacts or use in complex environments, the metal insulation cover 20 is less prone to deformation or damage, thus better protecting the internal vacuum layer and extending its service life. Moreover, metal materials offer advantages in processing and sealing, better matching the sealing requirements of the vacuum layer. The connections between metal parts can be highly sealed through welding, riveting, etc., effectively preventing air leakage into the vacuum layer and ensuring the integrity of the vacuum layer and the stability of the insulation effect.
[0059] As an example, the insulation cover 20 may optionally be a stainless steel insulation cover 20, an aluminum insulation cover 20, a copper insulation cover 20, a titanium insulation cover 20, etc.
[0060] While the embodiments of the present invention have been described in detail above, those skilled in the art can make various modifications and variations to the embodiments of the present invention without departing from the spirit and scope thereof. It should be understood that, to those skilled in the art, these modifications and variations will still fall within the spirit and scope of the embodiments of the present invention as defined in the claims.
Claims
1. A food warming device, characterized by, include: Multiple containers (10) are stacked sequentially from bottom to top; A heat insulation cover (20) is provided, the interior of which forms a heat insulation space (210). The heat insulation cover (20) can cover the exterior of a plurality of containers (10) so that the plurality of containers (10) are placed inside the heat insulation space (210).
2. The food warming device according to claim 1, characterized in that, A lateral limiting part is provided on the outer surface of the bottom wall of each of the containers (10) and / or on the top of the side wall of the container (10), the lateral limiting part being able to limit the lateral displacement of the container (10) located on the upper layer relative to the container (10) located on the lower layer.
3. The food warming device according to claim 2, characterized in that, The lateral limiting part includes a limiting groove (110) provided on the outer surface of the bottom wall of the container (10), the limiting groove (110) is recessed upward and the limiting groove (110) is provided along the outer peripheral edge of the container (10). The top of the side wall of the lower container (10) can be inserted into the limiting groove (110) of the upper container (10) to support the upper container (10).
4. The food warming device according to claim 3, characterized in that, The depth of the limiting groove (110) is greater than or equal to 2 mm; and / or The depth of the limiting groove (110) is less than or equal to 50% of the height of the holding container (10).
5. The food warming device according to any one of claims 1 to 4, characterized in that, The heat insulation cover (20) includes a cover body (220), the heat insulation space (210) is disposed inside the cover body (220), the cover body (220) includes an outer layer (222) and an inner layer (221) and a heat insulation layer (223) disposed between the outer layer (222) and the inner layer (221).
6. The food warming device according to claim 5, characterized in that, The insulation layer (223) is a vacuum layer, an air layer, or a heat insulation material layer.
7. The food warming device of claim 5, wherein The bottom of the cover body (220) is provided with an opening for the container (10) to enter and exit the heat-insulating space (210). The opening of the heat-insulating cover (20) is placed on the support surface (30) with the opening facing downward, so as to form a heat-insulating space (210) between the cover body (220) and the support surface (30).
8. The food warming device according to claim 5, characterized in that, The heat insulation cover (20) also includes a handle (230) disposed on the outer surface of the cover body (220).
9. The food warming device according to claim 8, characterized in that, The handle (230) is located on the top of the cover body (220). The top wall of the cover body (220) is provided with a downwardly recessed avoidance area (240). The avoidance area (240) is a circular recessed area and is located below the handle (230).
10. The food warming device according to any one of claims 1 to 4, characterized in that, The heat insulation cover (20) is a metal heat insulation cover (20).