Electric food warmer

Abstract

The utility model provides an electric food warmer which comprises an inner pot, a heating assembly and a shell, the inner pot is arranged in the shell, a sealed installation cavity is formed between the inner pot and the shell, the heating assembly is arranged in the installation cavity, a gas containing piece is arranged on the shell, the gas containing piece is provided with a cavity with a variable volume, and the cavity is provided with an opening. And the mounting cavity is communicated with the cavity through the opening. In the heating process, the volume of air in the mounting cavity is enlarged, part of air in the mounting cavity can flow into the cavity through the opening, and the volume of the cavity is enlarged; after the cooking is completed, the temperature of the electric food warmer is gradually reduced, the volume of air in the mounting cavity is reduced, the air in the cavity can return to the mounting cavity through the opening, and the volume of the cavity is reduced; when the air in the mounting cavity expands with heat and contracts with cold, the large air pressure difference between the mounting cavity and the outside can be avoided through the volume change of the cavity, so that the deformation of the inner pot and the shell is avoided, and the service life of the electric food warmer is prolonged.

Description

Technical Field

[0001] The utility model relates to the field of small household appliances, in particular to an electric hot pot. Background Art

[0002] An electric hot pot is a kitchen cooking appliance that can be used for stir-frying, frying, boiling and other cooking operations to meet different cooking needs, which makes the electric hot pot one of the indispensable equipment in the kitchen.

[0003] The existing electric hot pot mainly includes a shell and a pot body, and a heating element and related electronic devices are arranged between the shell and the pot body. Since various electronic devices are arranged between the shell and the pot body, in order to avoid water or oil stains entering during cleaning or use, the shell and the pot body need to be sealed.

[0004] However, since there is air in the cavity between the outer shell and the pot body, when the temperature changes, the air in the cavity will expand and contract, which may easily cause the pot body or the outer shell to deform. Utility Model Content

[0005] In view of this, it is necessary to provide an electric heating pot to address the above problems so as to prevent the pot body or the shell from being deformed.

[0006] The utility model provides an electric hot pot, comprising: an inner pot; a heating component; and an outer shell, wherein the inner pot is arranged in the outer shell, and a sealed installation cavity is formed between the inner pot and the outer shell, the heating component is arranged in the installation cavity, and a gas containing part is arranged on the outer shell, the gas containing part has a cavity with a variable volume, the cavity has an opening, and the installation cavity is connected with the cavity through the opening.

[0007] In the above-mentioned electric hot pot, the heating component is used to heat the food in the inner pot. During the heating process, the volume of the air in the installation cavity expands, and part of the air in the installation cavity can flow into the cavity through the opening, causing the gas containing part to expand and the volume of the cavity to expand; after cooking is completed, the temperature of the electric hot pot gradually decreases, the volume of the air in the installation cavity decreases, and the air in the cavity can return to the installation cavity through the opening, the gas containing part contracts and resets, and the volume of the cavity decreases; when the air in the installation cavity expands and contracts due to heat and cold, the volume change of the cavity can be used to avoid a large pressure difference between the installation cavity and the outside world, thereby avoiding deformation of the inner pot and the outer shell and extending the service life of the electric hot pot.

[0008] In one embodiment, the gas containing member is disposed on a side wall of the housing; and / or the gas containing member is disposed on a bottom wall of the housing.

[0009] With such an arrangement, when the gas container is arranged on the side wall of the shell, it is ensured that the gas container has sufficient deformation space and the cavity can accommodate enough gas; when the gas container is arranged on the bottom wall of the shell, the gas container is not easily seen, thereby ensuring that the appearance of the electric hot pot is regular.

[0010] In one embodiment, the gas container is detachably mounted on the bottom wall of the housing.

[0011] This arrangement makes it easy for users to disassemble or replace the gas containing component.

[0012] In one embodiment, there are a plurality of gas containers, the plurality of gas containers are arranged at intervals and the bottom surfaces of the plurality of gas containers are in the same horizontal plane.

[0013] With such arrangement, the electric hot pot can be stably and reliably supported on an external plane such as a table top or countertop through the bottom surfaces of the multiple gas containing parts, eliminating the original support leg structure, reducing the number of parts, and improving the aesthetics of the electric hot pot.

[0014] In one embodiment, a mounting hole is provided on the wall of the housing, the gas containing member has a slot, the gas containing member is mounted in the mounting hole, and the slot is mounted on the edge of the mounting hole.

[0015] With such arrangement, the installation method is simple and convenient, and is easy for users to operate. In addition, the gas containing member can seal the assembly hole to prevent water from entering the installation cavity through the assembly hole.

[0016] In one embodiment, the gas containing member includes a deformation portion and a fixed portion arranged on the deformation portion, the slot is formed between the fixed portion and the deformation portion, the fixed portion is hollow and the opening is opened in the fixed portion, the deformation portion is hollow and forms the cavity having the opening with the hollow fixed portion.

[0017] With such arrangement, the slot enables the fixing part to be clamped in the installation cavity to ensure the stability and reliability of the connection between the gas container and the shell; the deformation part is exposed from the side wall or bottom wall of the shell, so that the deformation part has a larger deformation space and will not interfere with the shell during the deformation process.

[0018] In one embodiment, the side wall of the deformation portion and / or the bottom wall of the deformation portion are concave toward the cavity.

[0019] Such an arrangement can increase the deformation space of the cavity and improve the deformation capacity of the deformation portion; and when the deformation portion expands, the side wall and the bottom wall of the deformation portion will not bulge out excessively.

[0020] In one embodiment, the side wall of the deformation portion and / or the bottom wall of the deformation portion has a corrugated structure.

[0021] With such a configuration, the corrugated structure reduces the volume of the cavity before deformation, thereby increasing the maximum volume difference between the cavity before and after deformation, increasing the deformation space of the cavity, and improving the deformation capacity of the deformation part; the corrugated structure can also prevent the cavity from being easily damaged after being deformed for a long time, thereby extending the service life of the gas container.

[0022] In one embodiment, the fixing portion includes a chamfered section and a reinforcement section, and two ends of the reinforcement section are respectively connected to the chamfered section and the deformation portion.

[0023] With such a configuration, the chamfered section plays a guiding role, so that the fixing part can be squeezed inward by the edge of the assembly hole and deformed, and the fixing part can be more easily inserted into the assembly hole; the reinforcement section is used to ensure the strength of the fixing part, prevent the fixing part from being deformed in the assembled state, and avoid the fixing part from accidentally falling out of the assembly hole.

[0024] In one embodiment, the deformation portion and the fixing portion are integrally formed.

[0025] Such an arrangement facilitates the production and processing of the gas containment component, while also ensuring the reliability and sealing of the connection between the two and ensuring the supporting strength of the gas containment component.

[0026] In one embodiment, the wall thickness of the deformation portion is between 1 mm and 5 mm.

[0027] Such an arrangement ensures the deformation capacity of the deformation part; at the same time, it ensures the strength of the deformation part, ensures the stability and reliability of the gas container when supporting the electric hot pot on the external plane, and avoids the deformation part from expanding too much or being easily damaged after being deformed for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 This is an explosion diagram of the electric hot pot provided in the utility model;

[0029] Figure 2 for Figure 1 Schematic diagram of the explosion of the electric hot pot from another perspective;

[0030] Figure 3 for Figure 1 A schematic cross-sectional view of a medium electric hot pot;

[0031] Figure 4 for Figure 3 The enlarged schematic diagram of point A in the middle;

[0032] Figure 5 for Figure 4A cross-sectional view of another embodiment of a gas container Figure 1 ;

[0033] Figure 6 for Figure 4 A cross-sectional view of another embodiment of a gas container Figure 2 ;

[0034] Figure 7 for Figure 1 Schematic diagram of the structure of the middle shell;

[0035] Figure 8 for Figure 3 The enlarged schematic diagram of point B in the middle;

[0036] Fig. 9 for Figure 8 Dimensional diagram of the middle seal;

[0037] Fig.10 for Figure 3 The enlarged schematic diagram of the center C;

[0038] Fig.11 for Figure 1 Schematic diagram of the three-dimensional structure of the middle envelope;

[0039] Fig.12 for Figure 1 Installation diagram of the inner pot and heating device.

[0040] Figure numerals: 10, inner pot; 11, first upper edge; 20, outer shell; 21, second upper edge; 22, gas container; 221, slot; 222, deformation portion; 2221, cavity; 2222, pleated structure; 223, fixing portion; 2231, opening; 2232, chamfered section; 2233, reinforcement section; 23, assembly hole; 30, heating component; 31, PTC heating component; 311, PTC Heater; 312, envelope; 3121, heat conducting plate; 3122, accommodating cavity; 32, graphite heat conducting sheet; 33, fixing assembly; 331, bolt; 332, nut; 40, sealing assembly; 41, sealing member; 411, first sealing portion; 412, second sealing portion; 42, fixing ring; 421, connecting edge; 422, extending edge; 4221, curling; 423, clamping cavity; 50, mounting cavity. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0042] It should be noted that when a component is referred to as being "mounted on" another component, it may be directly on the other component or there may be a central component. When a component is considered to be "set on" another component, it may be directly set on the other component or there may be a central component at the same time. When a component is considered to be "fixed to" another component, it may be directly fixed on the other component or there may be a central component at the same time.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art in the technical field of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "or / and" used herein includes any and all combinations of one or more related listed items.

[0044] An electric hot pot is a kitchen cooking utensil that can be used for cooking operations such as stir-frying, frying, and boiling to meet different cooking needs, which makes the electric hot pot one of the indispensable equipment in the kitchen. The existing electric hot pot mainly includes an outer shell and a pot body, and a heating element and related electronic devices are arranged between the outer shell and the pot body. Since various electronic devices are arranged between the outer shell and the pot body, in order to avoid water or oil stains entering during cleaning or use, the outer shell and the pot body need to be sealed. However, since there is air in the cavity between the outer shell and the pot body, when the temperature changes, for example, when the food is cooked and immediately cleaned, the air in the cavity will shrink, which can easily cause the pot body or the outer shell to deform.

[0045] In order to solve the above problems, Figures 1 to 12 As shown, the present application provides an electric heating pot to prevent the pot body or the shell from being deformed.

[0046] like Figure 3 to Figure 4 As shown, specifically, the electric hot pot includes an inner pot 10, a heating component 30 and an outer shell 20, wherein: the inner pot 10 is arranged in the outer shell 20, and a sealed installation cavity 50 is formed between the inner pot 10 and the outer shell 20, the heating component 30 is arranged in the installation cavity 50, and a gas containing part 22 is provided on the outer shell 20, the gas containing part 22 has a cavity 2221 with a variable volume, the cavity 2221 has an opening 2231, and the installation cavity 50 is connected with the cavity 2221 through the opening 2231.

[0047] The sealed installation cavity 50 may be a substantially sealed installation cavity 50, where the gas expansion rate in the installation cavity 50 is much greater than the gas leakage rate in the installation cavity 50. In other words, when there is a gap in the installation cavity 50 due to production and assembly errors or the lead-out of the power line, the installation cavity 50 is also a sealed installation cavity 50.

[0048] In the electric hot pot provided by the embodiment of the utility model, the inner pot 10 is used to hold food, and the heating component 30 is used to heat the food in the inner pot 10. During the heating process, the movement speed of the air molecules in the mounting cavity 50 is accelerated, the distance between the molecules becomes larger, and the air volume is expanded. At this time, part of the air in the mounting cavity 50 can flow into the cavity 2221 through the opening 2231, so that the gas containing part 22 expands and the volume of the cavity 2221 is expanded; after cooking is completed, the temperature of the electric hot pot gradually decreases, the movement speed of the air molecules in the mounting cavity 50 slows down, the distance between the molecules becomes smaller, and the air volume is reduced. At this time, the air in the cavity 2221 can return to the mounting cavity 50 through the opening 2231, the gas containing part 22 shrinks and resets, and the volume of the cavity 2221 is reduced; when the air in the mounting cavity 50 expands and contracts due to heat, the volume change of the cavity 2221 can avoid a large pressure difference between the mounting cavity 50 and the outside, thereby avoiding deformation of the inner pot 10 and the outer shell 20, thereby extending the service life of the electric hot pot.

[0049] In addition, the sealed installation cavity 50 can facilitate the user to clean the electric hot pot, so that the grease inside and outside the electric hot pot can be cleaned by washing with water, and water is prevented from entering the installation cavity 50, causing the heating component 30 and other electronic devices in the installation cavity 50 to come into contact with water and cause a short circuit.

[0050] Among them, the electric hot pot can be an electric frying pan, an electric boiling pot, an electric hot pot, etc., in which the inner pot 10 and the outer shell 20 are connected, and the food in the inner pot 10 is heated by the heating component 30 between the inner pot 10 and the outer shell 20. The embodiment of the utility model is not specifically limited here.

[0051] In one embodiment, the gas container 22 is disposed on the side wall of the housing 20. When the gas container 22 expands, it will not interfere with the external plane such as the desktop or countertop, thereby ensuring that the gas container 22 has sufficient deformation space and the cavity 2221 can accommodate enough gas. In another embodiment, the gas container 22 is disposed on the bottom wall of the housing 20. When the electric hot pot is placed on an external plane such as a desktop or countertop, the gas container 22 is not easily visible, thereby ensuring that the electric hot pot has a regular appearance. Of course, the gas container 22 can also be disposed on both the side wall and the bottom wall of the housing 20.

[0052] like Figure 3 As shown, in the illustrated embodiment, the gas container 22 is detachably mounted on the bottom wall of the housing 20. Since the cavity 2221 of the gas container 22 may be deformed each time it is used, it is easy to be damaged. The gas container 22 is detachably mounted on the housing 20 to facilitate the user to disassemble or replace the gas container 22.

[0053] Furthermore, there are multiple gas containers 22, which are arranged at intervals and whose bottom surfaces are on the same horizontal plane. In this case, the gas containers 22 can be used as legs, so that the electric hot pot can be stably and reliably supported on an external plane such as a table or countertop through the bottom surfaces of the multiple gas containers 22, thus eliminating the need for the original leg structure, reducing the number of parts, and improving the appearance of the electric hot pot.

[0054] Among them, only a plurality of gas containing members 22 may be used to support the electric heating pot. Under the condition that the gas containing members 22 can stably and reliably support the electric heating pot on the external plane, the number of the gas containing members 22 may be two, three or more, and the plurality of gas containing members 22 are evenly spaced and arranged along the circumference of the bottom wall of the shell 20. Alternatively, the gas containing members 22 may be used in conjunction with other solid legs to support the electric heating pot. In this case, the number of the gas containing members 22 may be one, two, three or more, as long as the installation cavity 50 and all deformed cavities 2221 can accommodate the expanded air in the installation cavity 50.

[0055] like Figure 3 to Figure 4 As shown, the wall of the housing 20 is provided with an assembly hole 23, that is, the side wall or the bottom wall of the housing 20 is provided with an assembly hole 23, and the gas container 22 has a clamping groove 221, and the gas container 22 is installed in the assembly hole 23, and the clamping groove 221 is clamped at the edge of the assembly hole 23. The gas container 22 is inserted into the assembly hole 23, and when the clamping groove 221 is clamped at the edge of the assembly hole 23, the assembly is completed, and the installation method is simple and convenient, which is convenient for users to operate, and the gas container 22 can seal the assembly hole 23 to prevent water from entering the installation cavity 50 through the assembly hole 23, causing the heating component 30 and other electronic devices to contact with water and cause short circuits.

[0056] like Figure 3As shown, the gas container 22 includes a deformation portion 222 and a fixed portion 223 disposed on the deformation portion 222, a slot 221 is formed between the fixed portion 223 and the deformation portion 222, the fixed portion 223 is hollow and an opening 2231 is opened in the fixed portion 223, and the deformation portion 222 is hollow and forms a cavity 2221 having an opening 2231 with the hollow fixed portion 223. When the air expands, part of the gas in the installation cavity 50 can enter the cavity 2221 through the opening 2231, so that the fixed portion 223 and the deformation portion 222 expand, and the internal space of the cavity 2221 expands; when the air contracts, the gas in the cavity 2221 can return to the installation cavity 50 through the opening 2231, and the fixed portion 223 and the deformation portion 222 contract and return to their original position. A slot 221 is formed between the fixing portion 223 and the deforming portion 222, so that the fixing portion 223 can be clamped in the installation cavity 50 to ensure the stability and reliability of the connection between the gas container 22 and the shell 20. The deforming portion 222 is exposed from the side wall or bottom wall of the shell 20, so that the deforming portion 222 has a large deformation space and will not interfere with the shell 20 or other structures inside the electric hot pot during the deformation process.

[0057] like Figure 4 As shown, the fixing portion 223 includes a chamfered section 2232 and a reinforcement section 2233, and the two ends of the reinforcement section 2233 are respectively connected to the chamfered section 2232 and the deformable portion 222. When the gas container 22 is installed, the chamfered section 2232 can abut against the edge of the assembly hole 23 and play a guiding role, so that the fixing portion 223 can be pressed inward by the edge of the assembly hole 23 and deformed, so that the fixing portion 223 is easier to be inserted into the assembly hole 23, which is convenient for the user to install the gas container 22. The reinforcement section 2233 is used to ensure the strength of the fixing portion 223, prevent the fixing portion 223 from being deformed in the assembled state, and prevent the fixing portion 223 from accidentally falling out of the assembly hole 23, thereby improving the stability and reliability of the connection between the gas container 22 and the side wall or bottom wall of the housing 20.

[0058] Since the deformable part 222 and the fixing part 223 both need to have a certain degree of deformation, the deformable part 222 and the fixing part 223 can be configured as elastic elements such as silicone parts, rubber parts or composites. In addition, the deformable part 222 and the fixing part 223 are integrally formed to facilitate the production and processing of the gas container 22, and at the same time, the reliability and sealing of the connection between the two can be ensured, and the supporting strength of the gas container 22 can be ensured.

[0059] Of course, in other embodiments, the fixing portion 223 of the gas container 22 can also be detachably connected to the side wall or bottom wall of the housing 20 by other means such as screw connection or plug connection, as long as it is ensured that the gas container 22 can be reliably connected to the side wall or bottom wall of the housing 20 in the assembled state to ensure the stability of the gas container 22 supporting the electric hot pot. In this case, the fixing portion 223 and the deformable portion 222 can be made of different materials and fixedly connected by other means such as snap connection or plug connection.

[0060] like Figure 4 As shown, in one embodiment, at least when the gas in the installation cavity 50 is not expanded, the bottom wall of the deformation part 222 is concave toward the cavity 2221; or, the side wall of the deformation part 222 is concave toward the cavity 2221. Of course, the side wall of the deformation part 222 and the bottom wall of the deformation part 222 can also be concave toward the cavity 2221. The concave structure on the side wall and the bottom wall of the deformation part 222 can increase the deformation space of the cavity 2221, improve the deformation ability of the deformation part 222, so that the cavity 2221 can accommodate more air after deformation. In addition, since the side wall and the bottom wall of the deformation part 222 are concave toward the cavity 2221, when the deformation part 222 expands, the side wall and the bottom wall of the deformation part 222 will not be too convex. When the gas containing member 22 is used as a support, the deformation part 222 can also support the electric hot pot stably on the external plane after expansion.

[0061] In another embodiment, if Figure 5 As shown, the bottom wall of the deformation portion 222 has a fold structure 2222; or, as shown Figure 6 As shown, the side wall of the deformation part 222 has a pleated structure 2222. Of course, the side wall of the deformation part 222 and the bottom wall of the deformation part 222 may also have a pleated structure 2222. Among them, the pleated structure 2222 may be a plurality of structures concave toward the cavity 2221. The pleated structure 2222 on the side wall and the bottom wall of the deformation part 222 reduces the volume of the cavity 2221 before deformation, thereby increasing the maximum volume difference between the cavity 2221 after deformation and before deformation, further increasing the deformation space of the cavity 2221, and improving the deformation capacity of the deformation part 222. At the same time, the pleated structure 2222 can also prevent the deformation part 222 from being easily damaged after being deformed for a long time, thereby extending the service life of the gas container 22.

[0062] like Figure 4As shown, the wall thickness of the deformation part 222 is between 1 mm and 5 mm. Among them, the wall thickness of the side wall of the deformation part 222 and the bottom wall of the deformation part 222 can be any value within the range of 1 mm to 5 mm, such as 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, etc. It can be understood that the thicker the wall thickness of the deformation part 222, the greater the pressure required to enable the deformation part 222 to deform. Therefore, the wall thickness of the deformation part 222 is less than or equal to 5 mm to ensure the deformation ability of the deformation part 222 and avoid the situation where the air in the installation cavity 50 expands due to heat and the deformation part 222 cannot be deformed. At the same time, the wall thickness of the deformation part 222 is greater than or equal to 1 mm to ensure the strength of the deformation part 222, to ensure the stability and reliability of the gas container 22 when supporting the electric hot pot on the external plane, and to avoid the deformation part 222 from being easily damaged after excessive expansion or deformation for a long time, thereby extending the service life of the gas container 22.

[0063] like Figure 3 and Figure 8 As shown, the electric hot pot also includes a sealing assembly 40, which includes a sealing member 41 and a fixing ring 42. The inner pot 10 has a first upper edge 11, and the outer shell 20 has a second upper edge 21. The sealing member 41 is clamped between the first upper edge 11 and the second upper edge 21. The fixing ring 42 includes a connecting edge 421 and extended edges 422 located at both ends of the connecting edge 421, and the connecting edge 421 and the two extended edges 422 form a clamping cavity 423. The first upper edge 11, the sealing member 41 and the second upper edge 21 are at least partially located in the clamping cavity 423, and the two extended edges 422 are respectively abutted against the first upper edge 11 and the second upper edge 21. The seal 41 is clamped between the first upper edge 11 and the second upper edge 21 to play a sealing role, thereby preventing water from entering between the inner pot 10 and the outer shell 20 through the gap between the first upper edge 11 and the second upper edge 21; the fixing ring 42 is used to fix the first upper edge 11, the seal 41 and the second upper edge 21 to prevent the seal 41 from falling off, and the first upper edge 11, the seal 41 and the second upper edge 21 are partially located in the clamping cavity 423, and the fixing ring 42 wraps the edges of the first upper edge 11, the seal 41 and the second upper edge 21, so that the edges of the first upper edge 11, the seal 41 and the second upper edge 21 are not exposed, and water will not contact the edges, thereby improving the waterproof effect and protecting the heating component 30 and other electronic devices between the inner pot 10 and the outer shell 20. At the same time, the fixing ring 42 can also play a decorative role to improve the aesthetics of the electric hot pot.

[0064] like Figure 8As shown, the shell 20 is made of metal material, and the thickness H3 of the shell 20 satisfies: 0.4mm≤H3≤0.6mm. The thickness H3 of the shell 20 can be any value within the range of 0.4mm≤H3≤0.6mm, such as 0.4mm, 0.41mm, 0.42mm...0.5mm, 0.6mm, etc. Compared with the plastic shell, the shell 20 made of metal material can ensure the strength and high temperature resistance of the electric hot pot while making the thickness of the shell 20 thinner and lighter, thereby reducing the overall volume and weight of the electric hot pot, making it easier for users to use and store.

[0065] like Figure 8 As shown, in one embodiment, the two extended edges 422 respectively press against the first upper edge 11 and the second upper edge 21. The two extended edges 422 respectively apply relative pressure to the first upper edge 11 and the second upper edge 21, so that the two extended edges 422 can clamp and fix the first upper edge 11, the sealing member 41 and the second upper edge 21, and the first upper edge 11 and the second upper edge 21 can also clamp and fix the sealing member 41, thereby improving the sealing effect and the connection strength between the inner pot 10, the outer shell 20 and the sealing assembly 40, and ensuring the reliability of the electric hot pot.

[0066] like Figure 8 As shown, at least one of the extension edges 422 is provided with a curl 4221 at one end away from the connection edge 421. When both extension edges 422 are provided with curls 4221, the two curls 4221 bend and extend from the end of the extension edge 422 away from the connection edge 421 toward the first upper edge 11 and the second upper edge 21, and respectively press the first upper edge 11 and the second upper edge 21. The two curls 4221 are respectively used to apply relative pressure to the first upper edge 11 and the second upper edge 21 to clamp and fix the first upper edge 11, the sealing member 41 and the second upper edge 21, further improving the connection strength between the inner pot 10, the outer shell 20 and the sealing assembly 40; at the same time, the curl 4221 can also improve the strength of the extension edge 422 itself, improve the reliability of the fixing ring 42, and prevent the fixing ring 42 from falling off.

[0067] When only the extended edge 422 in contact with the first upper edge 11 is provided with the curl 4221, the curl 4221 presses against the first upper edge 11 and can apply pressure to the first upper edge 11 toward the second upper edge 21, thereby also being able to clamp and fix the first upper edge 11, the seal 41 and the second upper edge 21; similarly, when only the extended edge 422 in contact with the second upper edge 21 is provided with the curl 4221, the curl 4221 presses against the second upper edge 21 and can apply pressure to the second upper edge 21 toward the first upper edge 11, thereby also being able to clamp and fix the first upper edge 11, the seal 41 and the second upper edge 21.

[0068] Furthermore, the fixing ring 42 and the curled circle 4221 of the fixing ring 42 can also prevent the sharp corners and burrs on the edges of the first upper edge 11, the second upper edge 21 and the extended edge 422 from scratching the user's hands, thereby ensuring the safety of the user when using and cleaning the electric hot pot.

[0069] In another embodiment, the two extended edges 422 contact the first upper edge 11 and the second upper edge 21 respectively, but do not apply pressure to the first upper edge 11 and the second upper edge 21 , as long as the sealing member 41 does not fall off the first upper edge 11 and the second upper edge 21 .

[0070] like Figure 8 As shown, the connecting edge 421 and the extending edge 422 are integrally formed to ensure the reliability of the connection between the connecting edge 421 and the extending edge 422, simplify the processing steps, and facilitate the production and assembly of the fixing ring 42. In addition, the integrally formed setting also makes the outer surface at the connection between the connecting edge 421 and the extending edge 422 a smooth surface, without sharp corners and burrs, and the user will not be scratched during use. Of course, the connecting edge 421 and the extending edge 422 can also be fixedly connected by other means such as welding, as long as the reliable connection between the two can be ensured, and the embodiment of the utility model is not specifically limited here.

[0071] Furthermore, the fixing ring 42 is preferably made of aluminum or stainless steel. Aluminum is light in weight, so that the overall weight of the electric hot pot can be reduced, making it easier for users to use. Stainless steel has the characteristics of corrosion resistance, high temperature resistance and high strength, which can ensure that the fixing ring 42 is not easily deformed during long-term use, thereby extending the service life. In addition, aluminum and stainless steel also have good plasticity and weldability, and are easy to be processed into various shapes, so that it is easy to process the connecting edge 421, the extended edge 422 and the curling 4221 on the extended edge 422.

[0072] Furthermore, the outer side surface of the fixing ring 42 may be a sanded surface or a mirrored surface to further enhance the aesthetics of the electric hot pot.

[0073] like Figures 8 to 9As shown, the sealing member 41 includes a first sealing portion 411 and a second sealing portion 412, the first sealing portion 411 is connected to the middle of the second sealing portion 412, the first sealing portion 411 is located between the bottom surface of the first upper edge 11 and the top surface of the second upper edge 21, and the second sealing portion 412 is located between the end surface of the first upper edge 11, the end surface of the second upper edge 21 and the connecting edge 421. The first sealing portion 411 is used to seal the gap between the first upper edge 11 and the second upper edge 21, and the second sealing portion 412 is used to seal the end surface of the first upper edge 11 and the end surface of the second upper edge 21, thereby achieving sealing of the first upper edge 11 and the second upper edge 21 in multiple directions, further improving the sealing effect, and preventing water from entering between the inner pot 10 and the outer shell 20 through the gap between the first upper edge 11, the sealing member 41 and the second upper edge 21.

[0074] At the same time, the second sealing portion 412 can also play a positioning role. The first sealing portion 411 is inserted between the first upper edge 11 and the second upper edge 21. When the second sealing portion 412 abuts against the end faces of the first upper edge 11 and the second upper edge 21, the seal 41 is installed in place, thereby facilitating the user to install the seal 41.

[0075] The first sealing portion 411 may be connected to the middle position of the second sealing portion 412 to form a T-shaped structure, in which case the length of the portion where the second sealing portion 412 fits with the end surface of the first upper edge 11 is equal to the length of the portion where the second sealing portion 412 fits with the end surface of the second upper edge 21. Alternatively, the first sealing portion 411 may also be connected to the middle of the second sealing portion 412 and the two sides, in which case the length of the portion where the second sealing portion 412 fits with the end surface of the first upper edge 11 is longer than the length of the portion where the second sealing portion 412 fits with the end surface of the second upper edge 21, or the length of the portion where the second sealing portion 412 fits with the end surface of the first upper edge 11 is shorter than the length of the portion where the second sealing portion 412 fits with the end surface of the second upper edge 21, as long as the second sealing portion 412 can fit with both the end surface of the first upper edge 11 and the end surface of the second upper edge 21.

[0076] like Fig. 9 As shown, the first sealing portion 411 and the second sealing portion 412 are integrally formed to ensure the reliability of the connection between the first sealing portion 411 and the second sealing portion 412, simplify the processing steps, and facilitate the production and assembly of the sealing member 41. Of course, the first sealing portion 411 and the second sealing portion 412 can also be fixedly connected by welding, gluing, or other methods, as long as a reliable connection between the two can be ensured, and the embodiment of the utility model is not specifically limited here.

[0077] like Fig. 9As shown, the thickness H1 of the first sealing portion 411 and the thickness H2 of the second sealing portion 412 satisfy: H1 / H2≥1. That is, the thickness H1 of the first sealing portion 411 is equal to the thickness H2 of the second sealing portion 412, or the thickness H1 of the first sealing portion 411 is thicker than the thickness H2 of the second sealing portion 412. The thickness H1 of the first sealing portion 411 refers to the dimension of the first sealing portion 411 along the height direction of the electric hot pot, and the thickness H2 of the second sealing portion 412 refers to the dimension of the second sealing portion 412 along the radial direction of the electric hot pot. The thickness H1 of the first sealing part 411 is relatively thick and has a strong deformation ability. When the first upper edge 11 and the second upper edge 21 squeeze the first sealing part 411, the first sealing part 411 can be greatly deformed, so that the first sealing part 411 has a better sealing effect between the first upper edge 11 and the second upper edge 21; and increasing the thickness H1 of the first sealing part 411 can also increase the overall thickness of the upper edge of the electric hot pot without increasing the weight of the electric hot pot, thereby improving the user experience. The thickness H2 of the second sealing part 412 is relatively thin, so as to avoid increasing the circumference of the upper edge of the electric hot pot and facilitate storage.

[0078] Specifically, the thickness H1 of the first sealing portion 411 satisfies: 3mm≤H1≤6mm, wherein the thickness H1 of the first sealing portion 411 can be any value within the range of 3mm≤H1≤6mm, such as 3mm, 4mm, 5mm, 6mm, etc. The thickness H2 of the second sealing portion 412 satisfies: 1mm≤H2≤3mm, wherein the thickness H2 of the second sealing portion 412 can be any value within the range of 1mm≤H2≤3mm, such as 1mm, 2mm, 3mm, etc. When the thickness H1 of the first sealing portion 411 and the thickness H2 of the second sealing portion 412 meet the above dimensions, the sealing effect of the sealing member 41 on the first upper edge 11 and the second upper edge 21 and the size of the electric hot pot are more suitable, and the production and manufacturing costs are relatively low.

[0079] Furthermore, the sealing member 41 can be configured as a silicone member or a rubber member, which ensures a sealing effect while having a low cost and is easy to produce and process.

[0080] like Figure 1 , Figure 3 and Fig.10As shown, the heating component 30 includes a PTC heating component 31, a graphite heat conductive sheet 32 ​​and a fixing component 33. One side of the graphite heat conductive sheet 32 ​​is in contact with the bottom of the inner pot 10, and the other side is in contact with the PTC heating component 31. The fixing component 33 fixes the heating component 30 to the bottom of the inner pot 10. The PTC heating component 31 includes a positive temperature coefficient thermistor material. Based on the characteristics of the positive temperature coefficient thermistor material, when current passes through the PTC heating component 31, the PTC heating component 31 will heat up, thereby heating the inner pot 10 and the food placed in the inner pot 10; when the temperature of the food in the inner pot 10 is low, the PTC heating component 31 will automatically adjust to the maximum power, quickly convert electrical energy into thermal energy, and heat up quickly, thereby ensuring cooking efficiency; when the temperature of the PTC heating component 31 rises to a certain level, the resistance value of the positive temperature coefficient thermistor material will increase sharply, thereby limiting the flow of current, automatically reducing the power, and achieving the effect of automatic temperature control, and the temperature amplitude of the PTC heating component 31 fluctuates less, usually around 3°C, thereby achieving precise temperature control; the heating component 30 does not need to add an additional thermostat, which can reduce the number of parts. Since the thickness of the PTC heating component 31 is relatively thin, it can avoid occupying too much space between the bottom of the inner pot 10 and the outer shell 20, thereby reducing the overall size of the electric hot pot.

[0081] In addition, the heat generated by the PTC heating component 31 is transferred to the graphite heat conductive sheet 32, and then the bottom of the inner pot 10 is heated by the graphite heat conductive sheet 32. Since the thermal resistance of graphite is low, the use of the graphite heat conductive sheet 32 ​​as a heat conductive medium can ensure the heat conduction effect; since the graphite heat conductive sheet 32 ​​is soft, elastic and easy to cut, when the PTC heating component 31 and the graphite heat conductive sheet 32 ​​are fixed to the bottom of the inner pot 10 through the fixing component 33, the graphite heat conductive sheet 32 ​​has an elastic extrusion margin, so that the two side surfaces of the graphite heat conductive sheet 32 ​​can be completely fitted with the PTC heating component 31 and the bottom of the inner pot 10 respectively, thereby ensuring the heating effect of the heating component 30 on the bottom of the inner pot 10, and the graphite heat conductive sheet 32 ​​can be cut according to the shape of the bottom of the inner pot 10, which is convenient for production and processing, and ensures that the bottom of the inner pot 10 is heated evenly.

[0082] like Figure 1 to Figure 2 As shown, the bottom of the inner pot 10 can be set to a regular or irregular shape such as a circle or a rectangle, and the shape of the graphite heat conductive sheet 32 ​​is the same as the shape of the bottom of the inner pot 10 to ensure that the heating component 30 can heat the bottom of the inner pot 10 evenly to prevent the inner pot 10 from being locally overheated and affecting the cooking effect or causing safety hazards.

[0083] Preferably, the thermal conductivity of the graphite heat conductive sheet 32 ​​is 700w / (mk) to 1300w / (mk). For example, 700w / (mk), 800w / (mk), 900w / (mk) ... 1200w / (mk), 1300w / (mk) and any other value within the range of 700w / (mk) to 1300w / (mk). Compared with heat conductive sheets made of copper, aluminum and other materials, the thermal conductivity of the graphite heat conductive sheet 32 ​​is higher, thereby ensuring the heat conductive effect of the graphite heat conductive sheet 32 ​​and improving the heating effect of the heating component 30 on the bottom of the inner pot 10.

[0084] In addition, the specific gravity of the graphite heat conductive sheet 32 ​​is 0.85 g / cm 3 Up to 1.9g / cm 3 For example, 0.85g / cm 3 , 0.86g / cm 3 ……0.9g / cm 3 , 1g / cm 3 ……1.9g / cm 3 Equal to 0.85g / cm 3 Up to 1.9g / cm 3 Compared with heat conducting sheets made of copper, aluminum and other materials, the graphite heat conducting sheet 32 ​​has a smaller specific gravity. In the case of the same volume, the graphite heat conducting sheet 32 ​​is lighter, thereby reducing the overall weight of the heating component 30 and the electric hot pot, making it more convenient for users to use.

[0085] like Figure 1 and Fig.10 As shown, the PTC heating component 31 includes a PTC heating element 311 and a sleeve 312. The PTC heating element 311 is installed in the sleeve 312, and the outer surface of the sleeve 312 is in contact with the graphite heat conductive sheet 32. The heat generated by the PTC heating element 311 is transferred to the sleeve 312, and is transferred to the graphite heat conductive sheet 32 ​​through the sleeve 312. The PTC heating element 311 is installed in the sleeve 312, and can be in contact with the inner surface of the sleeve 312 to ensure the heat conduction efficiency between the PTC heating element 311 and the sleeve 312. The outer surface of the sleeve 312 is in contact with the graphite heat conductive sheet 32 ​​to ensure the heat conduction efficiency between the sleeve 312 and the graphite heat conductive sheet 32. The sleeve 312 is used to support and protect the PTC heating element 311, and can also transfer the heat generated by the PTC heating element 311 to the graphite heat conductive sheet 32 ​​more evenly.

[0086] The envelope 312 may be made of a metal material with good thermal conductivity, such as aluminum, and the PTC heating element 311 may be encapsulated in the envelope 312 by a high-temperature resistant polyimide film.

[0087] like Figure 1 , Fig.10 and Fig.11 As shown, there are multiple PTC heating elements 311, and the envelope 312 includes a heat conducting plate 3121 and multiple accommodating cavities 3122 arranged side by side on the heat conducting plate 3121, and each PTC heating element 311 is installed in a accommodating cavity 3122. Each PTC heating element 311 is installed in a accommodating cavity 3122 separately, without affecting each other, so as to improve the safety of the use of the heating component 30 and avoid the safety hazard caused by the excessive temperature of the PTC heating element 311. Among them, the shape of the heat conducting plate 3121 is the same as the shape of the graphite heat conducting sheet 32, so as to ensure that the PTC heating component 31 can heat the graphite heat conducting sheet 32 ​​evenly, and prevent the graphite heat conducting sheet 32 ​​and the inner pot 10 from being locally overheated, which affects the cooking effect or brings safety hazards.

[0088] like Fig.11 As shown, the spacing between two adjacent accommodating cavities 3122 can prevent the distance between two adjacent PTC heating elements 311 from being too close, which may cause the temperature of the envelope 312 or a part of the graphite heat conductive sheet 32 ​​to be too high, causing the bottom of the inner pot 10 to be partially overheated, thereby affecting the cooking effect or causing safety hazards. In addition, the spacing between two adjacent PTC heating elements 311 can improve the utilization rate of the heat generated by each PTC heating element 311, improve the safety of the use of the heating assembly 30, and reduce the number of PTC heating elements 311, thereby reducing the production and use costs.

[0089] Furthermore, the plurality of PTC heating elements 311 are divided into a plurality of groups of heating circuits with different resistance values. By setting a plurality of PTC heating elements 311, a plurality of constant temperatures at different levels can be provided, so that the plurality of heating circuits with different resistance values ​​can be configured to provide different predetermined temperatures when turned on, and the user can select a suitable cooking temperature level as required.

[0090] In the illustrated embodiment, there are four PTC heaters 311, the middle two PTC heaters 311 form a group, the two PTC heaters 311 on both sides form another group, and the resistance value of the heating circuit composed of the middle two PTC heaters 311 is greater than the resistance value of the two PTC heaters 311 on both sides. The predetermined temperature provided by the heating circuit where the middle two PTC heaters 311 are located when turned on is greater than the predetermined temperature provided by the heating circuit where the two PTC heaters 311 on both sides are located when turned on. The user can choose to work only the middle two PTC heaters 311, only the two PTC heaters 311 on both sides, or all four PTC heaters 311 according to the required temperature, so as to meet the cooking needs of different temperatures and expand the scope of application of the electric hot pot. The middle two PTC heaters 311 are set as a group, and the two PTC heaters 311 on both sides are set as a group to ensure the uniformity of the heating assembly 30 heating the bottom of the inner pot 10, and avoid the temperature of the bottom of the inner pot 10 being too high on one side, which affects the cooking effect or brings safety hazards.

[0091] Of course, in other embodiments, the number of the PTC heater 311 may be one, two, three, five, six or more. When there are three PTC heaters 311, the middle PTC heater 311 may be a group, the two PTC heaters 311 on both sides may be another group, and the resistance value of the heating circuit of the middle PTC heater 311 may be greater than the resistance value of the two PTC heaters 311 on both sides. When there are six PTC heaters 311, the middle two PTC heaters 311 may be a first group, the two PTC heaters 311 adjacent to the middle two PTC heaters 311 may be a second group, the two PTC heaters 311 on both sides may be a third group, and the resistance values ​​of the three groups of heating circuits may be different.

[0092] like Figure 1 and Fig.12 As shown, there are multiple fixing components 33, one of which is located at the center of the bottom of the inner pot 10, and the other fixing components 33 are evenly spaced along the circumference of the bottom of the inner pot 10. Multiple fixing components 33 can improve the stability and reliability of the connection between the PTC heating component 31, the graphite heat conductive sheet 32 ​​and the bottom of the inner pot 10, wherein the fixing component 33 located at the center of the bottom of the inner pot 10 can ensure that the centers of the PTC heating component 31, the graphite heat conductive sheet 32 ​​and the bottom of the inner pot 10 can fit tightly, and the fixing components 33 arranged along the circumference of the bottom of the inner pot 10 can ensure that the peripheries of the PTC heating component 31, the graphite heat conductive sheet 32 ​​and the bottom of the inner pot 10 can also fit tightly, so as to ensure that each part between the PTC heating component 31, the graphite heat conductive sheet 32 ​​and the bottom of the inner pot 10 can fit tightly, with basically no gap, thereby improving the heat conduction efficiency between the three.

[0093] The number of the fixing components 33 is preferably four or five, so as to ensure the stability and reliability of the connection between the PTC heating component 31, the graphite heat conductive sheet 32 ​​and the bottom of the inner pot 10, and avoid assembly difficulties caused by too many fixing components 33. Of course, the number of the fixing components 33 can also be one, two, three or more, while ensuring the stable and reliable connection between the PTC heating component 31, the graphite heat conductive sheet 32 ​​and the bottom of the inner pot 10, and the utility model does not make specific restrictions here.

[0094] In the illustrated embodiment, the fixing assembly 33 includes a bolt 331 and a nut 332. One end of the bolt 331 is welded to the bottom of the inner pot 10, and passes through the graphite heat conducting sheet 32 ​​and the PTC heating assembly 31 in sequence, and is fixed by the nut 332. When the nut 332 is threadedly connected to the bolt 331, the PTC heating assembly 31 and the graphite heat conducting sheet 32 ​​can be pressed and fixed toward the bottom of the inner pot 10. The bolt 331 and the nut 332 have a simple structure, a simple and convenient production and assembly process, a low cost, and can ensure the stability and reliability of the connection between the three.

[0095] Of course, in other embodiments, while ensuring that the PTC heating component 31, the graphite heat conductive sheet 32 ​​and the bottom of the inner pot 10 are stably and reliably connected, the fixing component 33 can also be fixedly connected by other means such as snap-in, plug-in, welding, etc.

[0096] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0097] The above-mentioned embodiments only express several implementation methods of the utility model, and the description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An electric hot pot, characterized in that: include: Inner pot (10); A heating assembly (30); and The invention relates to a shell (20), wherein the inner pot (10) is arranged in the shell (20), and a sealed installation cavity (50) is formed between the inner pot (10) and the shell (20), and the heating component (30) is arranged in the installation cavity (50). The shell (20) is provided with a gas containing part (22), and the gas containing part (22) has a cavity (2221) with a variable volume, and the cavity (2221) has an opening (2231), and the installation cavity (50) is connected with the cavity (2221) through the opening (2231).

2. The electric hot pot according to claim 1, characterized in that: The gas containing member (22) is arranged on a side wall of the outer shell (20); and / or the gas containing member (22) is arranged on a bottom wall of the outer shell (20).

3. The electric hot pot according to claim 1, characterized in that: The gas containing member (22) is detachably mounted on the bottom wall of the housing (20).

4. The electric hot pot according to claim 3, characterized in that: There are a plurality of gas containing members (22), the plurality of gas containing members (22) are arranged at intervals, and the bottom surfaces of the plurality of gas containing members (22) are on the same horizontal plane.

5. The electric hot pot according to any one of claims 1 to 4, characterized in that: An assembly hole (23) is provided on the wall of the housing (20), the gas container (22) has a clamping groove (221), the gas container (22) is mounted in the assembly hole (23), and the clamping groove (221) is clamped on the edge of the assembly hole (23).

6. The electric hot pot according to claim 5, characterized in that: The gas container (22) comprises a deformation portion (222) and a fixing portion (223) arranged on the deformation portion (222); the slot (221) is formed between the fixing portion (223) and the deformation portion (222); the fixing portion (223) is hollow and the opening (2231) is opened in the fixing portion (223); the deformation portion (222) is hollow and forms the cavity (2221) having the opening (2231) with the hollow fixing portion (223).

7. The electric hot pot according to claim 6, characterized in that: The side wall of the deformation portion (222) and / or the bottom wall of the deformation portion (222) are concave toward the cavity (2221).

8. The electric hot pot according to claim 6, characterized in that: The side wall of the deformation portion (222) and / or the bottom wall of the deformation portion (222) has a pleated structure (2222).

9. The electric hot pot according to claim 6, characterized in that: The fixing portion (223) comprises a chamfered section (2232) and a reinforcement section (2233), and two ends of the reinforcement section (2233) are respectively connected to the chamfered section (2232) and the deformation portion (222).

10. The electric hot pot according to claim 6, characterized in that: The deformation portion (222) and the fixing portion (223) are integrally formed.

11. The electric hot pot according to claim 6, characterized in that: The wall thickness of the deformation portion (222) is between 1 mm and 5 mm.

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