Waterproof electric stewpot

Abstract

The utility model provides a waterproof electric stewpot which comprises a pot body, a water containing cavity and a water containing container forming the water containing cavity are arranged in the pot body, the water containing container is provided with a container bottom wall and a container side wall, and a heating area is arranged on the edge of the container bottom wall; the stewing cup is located in the water containing cavity, the stewing cup is provided with a stewing cup side wall and a stewing cup bottom wall, and the heating area is located on the edge of the stewing cup bottom wall; at least part or all of the heating piece is arranged at the position where the heating area is located, and the heating piece makes contact with the liquid in the water containing cavity through the heating area so as to heat the liquid in the water containing cavity; the sealing ring comprises a first sealing part which is located in the thickness direction of the heating piece and located between the heating piece and the water container. The first sealing part is located in the thickness direction of the heating piece and clamped between the water container and the heating piece, so that the sealing area of the sealing ring is expanded in other directions, enough sealing width is guaranteed, and good sealing can be achieved.

Description

Technical Field

[0001] The present application belongs to the technical field of kitchen appliances, and in particular relates to a water-proof electric stew pot. Background Art

[0002] At present, electric stew pots are mainly used to make soups, porridges, complementary foods, etc., and users mostly use them at night, which can not only meet the needs of long-term stewing but also make full use of leisure time without taking up precious working time, so as to reduce waiting and get delicious and nutritious food the next morning. However, nighttime is people's rest time, and existing electric stew pots make gurgling noises during operation, which affects people's sleep and has a poor user experience.

[0003] For example, Chinese patent CN202060584U discloses a low-noise water-proof electric stew pot. By arranging the heating element at the bottom of the water container, and the heating element is located on the edge and / or outside of the stew pot's positive projection on the bracket, the noise pollution of the water-proof stew pot is reduced, making it suitable for nighttime use. However, the heating element of the above scheme is an annular heating element, such as an annular electric heating coil or an annular electric heating tube. The cost of using the above heating element is relatively high, which is not suitable for the current market pricing of products, and is prone to the risk of dry heating. Because the electric heating coil and the electric heating tube are both ordinary resistive heating elements, there is no temperature limit during their own working process. When the liquid in the water container evaporates, and there is no closed-loop control of the temperature sensor (if the sensor is used to achieve closed-loop control, the cost will be further increased), it is easy to burn the machine. For this reason, it is not suitable for long-term cooking scenarios.

[0004] For example, the heating base and food steamer disclosed in Chinese patent CN211155142U have a sealing member between the heating element and the inner pot, which can ensure a sealing fit between the inner pot and the heating element, thereby enhancing the sealing reliability between the inner pot and the heating element and preventing water leakage from the heating base. However, this sealing method is not suitable for the solution in which the heating element is located at the edge of the orthographic projection, as in the above-mentioned Chinese patent CN202060584U. This is mainly because when the heating element is moved to the edge, the space at the edge is very narrow and there is not much space available. This makes the sealing surface between the sealing member and the inner pot also very narrow, making it easy for the seal to fail and cause water leakage. Summary of the Invention

[0005] The present application provides a water-proof electric stew pot to solve the technical problem that a heating element arranged on one side of an edge is prone to sealing failure and water leakage due to a small edge space and a narrow sealing surface.

[0006] On the one hand, the technical solution adopted in one embodiment of the present application is:

[0007] A waterproof electric stew pot comprises: a pot body, wherein the pot body is provided with a water holding cavity and a water container forming the water holding cavity, the water holding container has a container bottom wall and a container side wall, and the edge of the container bottom wall is provided with a heating zone; a stewing pot, located in the water holding cavity, the stewing pot has a stewing pot side wall and a stewing pot bottom wall, and the heating zone is located at the edge of the stewing pot bottom wall; a heating element, at least part of or all of the heating element is provided at the location of the heating zone, and contacts the liquid in the water holding cavity through the heating zone to heat the liquid in the water holding cavity; a sealing ring, wherein the sealing ring comprises a first sealing portion located in the thickness direction of the heating element and between the heating element and the water holding container.

[0008] As a preferred implementation manner of this embodiment, an extension portion is provided on the outer side of the bottom wall of the water container, the extension portion forms a receiving groove for installing the heating element, and the first sealing portion is provided between the extension portion and the heating element.

[0009] As a preferred implementation manner of this embodiment, the sealing ring further includes a second sealing portion located in the upper end surface direction of the heating element, and the upper end surface direction is the end surface direction of the heating element toward the heating zone.

[0010] As a preferred implementation manner of this embodiment, it also includes a cover plate, and the heating element is fixed on the water container through the cover plate; the sealing ring also includes a third sealing portion located in the lower end face direction of the heating element, and the lower end face direction is the end face direction of the heating element toward the side of the cover plate.

[0011] As a preferred implementation of this embodiment, a heat insulating layer is provided between the heating element and the cover plate, and the heat insulating layer is the third sealing portion so that the heat insulating layer and the sealing ring are integrally formed, and the heat insulating layer fully wraps the lower end surface of the heating element.

[0012] As a preferred implementation manner of this embodiment, the third sealing portion is provided with a heat dissipation opening, and the lower end surface of the heating element is exposed toward one side of the cover plate at the heat dissipation opening.

[0013] As a preferred implementation manner of this embodiment, the cover plate is provided with heat dissipation holes, and the heat dissipation holes communicate with the inner and outer spaces of the cover plate.

[0014] As a preferred implementation of this embodiment, the heating element comprises a heat conducting element and a PTC heating sheet. The heat conducting element is an extruded shell, and the PTC heating sheet is arranged in a fixed cavity inside the heat conducting element.

[0015] As a preferred implementation manner of this embodiment, the heating zone is in the shape of an elongated strip, and the length direction of the heating zone extends toward the circumferential direction of the circumferential spacing space.

[0016] As a preferred implementation of this embodiment, the bottom wall of the container forms a heating trough at the heating zone, and the heating element constitutes the bottom wall of the heating trough.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by this application are as follows:

[0018] In this application, to address the technical problem of a heater positioned at the edge of a container's bottom wall, where the space around the edge is small and the sealing surface is narrow, leading to leaks and seal failure, the present application improves upon conventional sealing methods. Specifically, the sealing ring includes a first sealing portion located in the thickness direction of the heater and between the heater and the water container. Considering that the heater positioned at the edge of the container's bottom wall will maximize the surface space on the bottom wall for heating the water within, the sealing surface on the heater's end face is very narrow, with the sealing width in some embodiments being only a few millimeters. Relying solely on this conventional sealing method, the appliance would fail to seal and leak when dry-boiled without water. Because the first sealing portion is located in the thickness direction of the heater and sandwiched between the water container and the heater (the thickness direction being the vertical direction in the figure), it effectively expands the sealing area of ​​the sealing ring in other directions, thereby ensuring a sufficient sealing width. Thus, the presence of the first sealing portion ensures a good seal between the heater and the water container on the edge.

[0019] In some preferred embodiments, in order to achieve sealing in the thickness direction of the heating element, an extension portion is provided on the outer side of the bottom wall of the water container, and the extension portion forms a receiving groove for installing the heating element. The first sealing portion is arranged between the extension portion and the heating element. For this reason, the arrangement of the extension portion can achieve the first sealing portion in the thickness direction being between the heating element and the water container, thereby forming a good seal.

[0020] In some preferred embodiments, the first sealing portion and the second sealing portion constitute a double sealing structure, so that the heating element located at the edge has sealing measures not only in the end face direction, but also in the thickness direction, thereby improving the sealing effect of the edge heating element.

[0021] In some preferred embodiments, a third sealing portion is provided in the direction of the lower end face, which can also form a double seal with the first sealing portion, thereby improving the sealing effect. If the first, second and third sealing portions are provided at the same time, they can form a triple seal together with the other two sealing portions, thereby forming a ring-shaped seal.

[0022] In some preferred embodiments, the provision of the heat insulating layer can reduce the risk of the cover plate being melted by the heating element if the cover plate is easily deformed.

[0023] In some preferred embodiments, the third sealing portion is provided with a heat dissipation port, so as to facilitate timely dissipation of heat from the lower end surface of the heating element, thereby ensuring that the heating element operates within a normal working range.

[0024] In some preferred embodiments, the provision of heat dissipation holes can facilitate heat dissipation of the heating element and is beneficial to heat convection in the space on both sides of the cover plate.

[0025] In some preferred embodiments, the heating element is a PTC heating element, which has low cost and automatic constant temperature characteristics. Therefore, it is suitable for scenarios that require long cooking times, making the entire cooking process safer and more reliable. Extrusion molding is the most common processing method for PTC heating elements, so it can be mass-produced at low cost.

[0026] In some preferred embodiments, the heating zone is in the shape of an elongated strip, and the length direction of the heating zone extends toward the circumferential direction of the peripheral spacing space, thereby making full use of the limited edge space to install the heating element to achieve higher heating efficiency.

[0027] In some preferred embodiments, the bottom wall of the container forms a heating trough in the heating area, and the heating element constitutes the bottom wall of the heating trough, so that the bottom wall of the heating trough is lower than the upper surface of the bottom wall of the container, making it the lowest point of the water container. Therefore, during normal cooking, no matter how much water is in the container, it can be fully ensured that the water in the water container can flow into the heating trough, so as to ensure that there is water in the heating trough at all times, reducing the risk of dry burning of the heating element. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] The drawings described herein are used to provide a further understanding of the present application and constitute a part of the present application. The illustrative embodiments of the present application and their descriptions are used to explain the present application and do not constitute an improper limitation on the present application. In the drawings:

[0029] Figure 1 A cross-sectional view of a water-proof electric stew pot provided in an embodiment of the present application;

[0030] Figure 2 A top view of the water-proof electric stew pot provided in an embodiment of the present application;

[0031] Figure 3 A cross-sectional view of the stew pot structure provided in an embodiment of the present application;

[0032] Figure 4 A cross-sectional view of a heating element provided in an embodiment of the present application;

[0033] Figure 5 A cross-sectional view of another heating element provided in an embodiment of the present application;

[0034] Figure 6 A partially enlarged schematic diagram provided in an embodiment of the present application;

[0035] Figure 7 A three-dimensional diagram provided for an embodiment of the present application;

[0036] Figure 8 A partially enlarged schematic diagram of a sealing ring provided in an embodiment of the present application;

[0037] Figure 9 This is an exploded schematic diagram of a sealing ring portion provided in an embodiment of the present application;

[0038] Figure 10 A partially enlarged schematic diagram of another sealing ring provided in an embodiment of the present application;

[0039] Figure 11 A schematic diagram of an exploded view of another sealing ring portion provided in an embodiment of the present application.

[0040] in,

[0041] Pot body 100; stew pot 200; pot cover 300;

[0042] Housing 101; water container 102; base 103; water chamber 104; heating element 105; operation panel 106; mounting chamber 107; heating area 108;

[0043] Container side wall 1021; container bottom wall 1022; first area 1023; second area 1024; fourth area 1025; limiting boss 221;

[0044] Heat conducting member 1051; insulating layer 1052; PTC heating element 1053; fixing cavity 1054; heat transfer surface 1055; heating sink 1081; sealing ring 1082; cover plate 1083; heat insulating layer 1084; heat dissipation hole 1085; first fixing position 1086; second fixing position 1031; fixing column 1087; limiting rib 1088; power line slot 1089; first sealing portion 1090; extension portion 1091; accommodating groove 1092; second sealing portion 1093; third sealing portion 1094; heat dissipation vent 1095;

[0045] Core heating area 551; peripheral heat transfer area 552;

[0046] Circumferential edge area 110; Circumferential spacing space 120;

[0047] Stewing pot bottom wall 201; stewing pot side wall 202;

[0048] Support ribs 2011; inner side of the bottom wall 2012; outer side of the bottom wall 2013; arc-shaped transition portion 2014. DETAILED DESCRIPTION

[0049] In order to more clearly illustrate the overall concept of the present application, a detailed description is given below in an illustrative manner in conjunction with the accompanying drawings.

[0050] In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present application is not limited to the specific embodiments disclosed below.

[0051] In addition, in the description of the present application, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings. They are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, they cannot be understood as limitations on the present application.

[0052] In this application, unless otherwise expressly specified or limited, terms such as "installed," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connection, detachable connection, or integration; mechanical connection, electrical connection, or communication; direct connection or indirect connection through an intermediate medium; and internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this application based on specific circumstances.

[0053] In this application, unless otherwise expressly specified and limited, a first feature "above" or "below" a second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present application. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0054] The present application proposes a water-proof electric stew pot, which heats the food in the stew pot through water bath heating, so that the food in the stew pot is heated evenly, so as to cook delicious, soft, nutritious and healthy soups, porridges, stews, beauty-enhancing foods, complementary foods or foods for mothers and babies.

[0055] refer to Figure 1The water-proof electric stew pot comprises a pot body 100, a stewing pot 200 placed in the pot body 100, and a pot lid 300 covering the pot body 100. The pot body 100 includes a water container 102, an outer shell 101 and a base 103. The side of the outer shell 101 is provided with an operation panel 106. A water cavity 104 is formed inside the water container 102. The stewing pot 200 is located in the water cavity 104. When in use, a certain amount of water is added to the water cavity 104 so that the stewing pot is submerged in the water. A heating element 105 is provided on the water container 102. The heat of the heating element 105 is transferred to the water in the water cavity 104. The heat of the water in the water cavity 104 is then transferred to the ingredients in the stewing pot, thereby achieving water-proof stewing.

[0056] The stewing pot is made of ceramic and fired at high temperature. The ceramic stewing container has a small specific heat capacity, so the heat required to increase the temperature by 1°C is small, so a smaller power heating element can be used to heat it. Moreover, due to its poor thermal conductivity, the absorbed heat is easily accumulated in the container body, achieving long-term high temperature, which can provide a long-term high-temperature cooking environment for the food in the container. In summary, the water-proof electric stew pot has the advantages of low requirements for the form of heating elements and simple appliance structure, so it is low in price and can cook some recipes whose taste cannot even be matched by pressure cookers, so it is deeply loved by users. In addition, another feature of the waterproof electric stew pot is that the stew pot is placed in the water container 102, and the heating element 105 heats the water in the water container 102 instead of directly heating the stew pot. The stew pot absorbs the heat from the boiling water and then heats the ingredients in the stew pot. Since the water temperature has an upper limit, when the water in the water chamber 104 boils, the temperature can also be maintained stable, so that the heating temperature of the stew pot is close to the boiling point of water. As long as there is water, the temperature can be close to the boiling point, so that the stew pot is heated very evenly. It is particularly suitable for making porridge and other foods that need to be simmered over low heat, which can fully lock in nutrients and is not easy to stick to the pot.

[0057] One problem brought about by the characteristics of water-bath stewing is that it makes too much noise. Since the stewing time is long and porridge is mostly a breakfast recipe, water-bath electric stew pots are often used in the leisure time at night to cook. During the cooking process, the bubbles generated by the boiling water in the water chamber 104 are likely to generate noise, affecting sleep and giving people a bad experience. The main reason for the noise is that the bubbles gather at the bottom of the stew pot and cannot float to the water surface in time, thus gathering into large bubbles, and then rising to the liquid surface, pushing a large amount of water to surge and make noise.

[0058] To solve this technical problem, the present application further adopts the following technical solutions:

[0059] like Figure 1 、 2As shown in FIG. 3 , the water container 102 has a container side wall 1021 and a container bottom wall 1022. The container bottom wall 1022 has a peripheral edge area 110 close to the container side wall 1021. The heating element 105 is arranged in the peripheral edge area 110. A peripheral spacing space 120 is provided between the stewing pot side wall 202 of the stewing pot 200 and the container side wall 1021. At least a portion of the peripheral edge area 110 forms the bottom wall of the peripheral spacing space 120. Through the above arrangement, the position of the heating element 105 in the water container 102 is roughly the edge of the area projected from the stewing pot bottom wall 201 of the stewing pot 200 onto the container bottom wall 1022, that is, from Figure 2 From the perspective of perspective, the bottom wall 201 of the stewing pot 200 should minimize the obstruction of the heating element 105. In this way, after the heating element 105 heats the water in the water holding chamber 104 and boils it, the bubbles generated will be as far away from the bottom wall 201 of the stewing pot 200 as possible, thereby avoiding the bottom wall 201 of the stewing pot 200 hindering the bubbles from quickly floating up, so that the generated bubbles can quickly float to the water surface and be discharged in time through the air outlet of the pot cover 300, solving the problem of the existing water-proof electric stew pot cooking process, due to the obstruction of the bubbles by the bottom wall 201 of the stewing pot, which causes small bubbles to gather into large bubbles, causing the liquid surface to surge violently and easily emitting loud noises.

[0060] The heating element 105 of the present application uses a PTC heater (positive temperature coefficient thermistor). As the temperature of the PTC heater increases, the material resistance increases. After thermal equilibrium is reached, the temperature is automatically maintained. Therefore, it is more suitable for scenarios that require long cooking times, making the entire cooking process safer and more reliable. The PTC heater is arranged in the peripheral edge area 110 on the bottom wall 1022 of the container. In some existing electric stew pots, the heating element is arranged on the side wall of the container, and the interior is heated through the side wall of the container. Since the water in the water chamber of the waterproof electric stew pot easily evaporates during cooking, the liquid level will gradually drop. If the heating element is arranged on the side wall of the container, it will easily dry burn, causing damage to the appliance and posing a safety risk. Side wall heating is suitable for metal water containers. The water container of the waterproof electric stew pot in this embodiment is made of plastic. In some alternative embodiments, the water container can be made of metal.

[0061] In order to achieve a good heating effect, in this embodiment, Figure 1 、 2As shown in Figures 6 and 7, the heating element 105 is arranged in the installation cavity 107 between the water container 102 and the shell 101 or the base 103. For this purpose, a heating area 108 is provided at the edge of the bottom wall 1022 of the container. The heating area 108 is located in the peripheral edge area 110. The heating area 108 is away from the center of the water cavity 104, so that after the stewing pot 200 is placed in the water container 102, the heating area 108 can be located as much as possible at the edge of the bottom wall 201 of the stewing pot, rather than in the center of the bottom wall 201 of the stewing pot. The heating element 105 is arranged in the heating zone 108, and the PTC heating element contacts the liquid in the water chamber 104 through the heating zone 108, thereby heating the liquid in the water container 102; the heating zone 108 is set on the bottom wall 1022 of the container, so that the actual effective heating area of ​​the heating element 105 is limited to the area where the heating zone is located. For this reason, it is only necessary to design the position and shape of the heating zone to effectively reduce the noise. As for the shape and structure of the heating element itself, it can be selected or designed according to actual conditions. For this reason, the limited space or area of ​​the peripheral edge can be effectively utilized to achieve a better noise reduction effect; in this embodiment, other area parts outside the area where the heating zone is located are areas that cannot be effectively heated.

[0062] In this embodiment, the heating zone 108 is arranged to penetrate along the thickness direction of the container bottom wall 1022, so that the heating element 105 installed on the outer surface side of the container bottom wall 1022 is exposed, so as to facilitate the heating element to directly heat the liquid in the water container 102; the heating element is installed on the outer surface side of the container bottom wall 1022, that is, in the installation cavity 107 between the water container 102 and the outer shell 101 or the base 103, which can ensure electrical safety, ensure the safety of users' electricity use, and facilitate wiring for easy installation.

[0063] In this embodiment, Figure 6 As shown, the bottom wall 1022 of the container forms a heating trough 1081 in the heating area 108, and the heating element constitutes the bottom wall of the heating trough, so that the bottom wall of the heating trough 1081 is lower than the upper surface of the bottom wall 1022 of the container, making it the lowest point of the water container 102. Therefore, during normal cooking, no matter how much water is in the water container 102, it can be fully guaranteed that the water in the water container 102 can flow into the heating trough 1081, so as to ensure that there is water in the heating trough 1081 at all times, reducing the risk of dry burning of the heating element.

[0064] like Figure 4 、 5 As shown, in this embodiment, the PTC heating element adopts a flat-plate heating element, which includes a heat-conducting element 1051, an insulating layer 1052 and a PTC heating plate 1053. The heat-conducting element 1051 has a fixed cavity 1054. The PTC heating plate 1053 is wrapped with the insulating layer 1052 and installed in the fixed cavity 1054 to achieve insulation from the heat-conducting element 1051, and the wire is exposed from one end of the fixed cavity 1054.

[0065] In a specific embodiment, in order to set the PTC heating sheet in the fixed cavity within the heat conducting member, the heat conducting member 1051 is an aluminum profile, and the shell is manufactured by extrusion molding. Due to the limitations of the extrusion molding process, the fixed cavity 1054 cannot be formed into other curved shapes such as arcs. For this reason, the fixed cavity 1054 is an elongated cavity with two ends open. The elongated fixed cavity 1054 makes the core heating area of ​​the entire PTC heating element distributed in an elongated shape, that is, the entire heating element may be in the shape of a long strip. Considering the limited space in the peripheral edge area, in order to improve the heat transfer efficiency, the entire core heating area can be set within the heating area. For this reason, the shape of the heating area 108 can be set to be a long strip.

[0066] Specifically, such as Figure 1 、 2 As shown, the circumferential space 120 has a width direction WD from the center of the container bottom wall 1022 to the container side wall 1021, and a circumferential direction RD extending circumferentially along the container side wall 1021. The shape of the heating zone 108 projected onto the container bottom wall is an elongated strip, and the length direction L of the heating zone 108 extends toward the circumferential direction RD of the circumferential space 120, thereby making full use of the limited edge space to install the elongated PTC heating element, thereby ensuring that the core heating area of ​​the PTC heating element in the heating zone 108 is located in the heating zone 108, achieving higher heating efficiency. It should be understood that not only the circular container side wall contour has a circumferential direction RD, but other contour shapes also have a circumferential direction, that is, the circumferential direction can be a straight line or an arc. Specifically, the shape of the container side wall 1021 of the water container 102 in the top view direction can be various and is not necessarily a strict circle or rectangle. For example, it can be as shown in FIG. Figure 2 The generally square structure shown in FIG is relatively rounded and generally square, but has many arcs in the circumferential direction. It should also be understood that the longitudinal direction L of the heating zone 108 extends toward the circumferential direction RD of the circumferential side spacing space 120, which does not mean that the longitudinal direction L of the heating zone 108 extends parallel to the circumferential direction RD of the circumferential side spacing space 120. Figure 2 As shown, the length direction L of the heating zone 108 extends approximately toward the circumferential direction RD at an angle, that is, the length direction of the heating zone extends toward the outside of the first area or the second area, and further, the length direction of the heating element extends toward the outside of the first area or the second area.

[0067] The width direction W of the heating zone 108 extends along the width direction WD of the peripheral space 120. The length of the heating zone 108 is greater than its width. This prevents the heating zone from being excessively obscured by the bottom wall of the stew pot, which helps reduce noise. In some variations of this embodiment, the heating zone can also be configured in other shapes, such as a sector or a circle.

[0068] like Figure 4 、 5 As shown, the heat transfer member 1051 of the PTC heating element includes a heat transfer surface 1055, which is arranged toward the heating zone 108. The heat transfer surface 1055 includes at least a core heating zone 551, which is arranged corresponding to the fixed cavity 1054. Thus, the heat generated by the heating plate in the fixed cavity 1054 can be quickly transferred to the core heating zone 551 through the heat transfer member 1051. The heat transfer surface 1055 of some heat transfer members 1051 also has a peripheral heat transfer zone 552, which is arranged corresponding to the outside of the core heating zone 551. The heat of the core heating zone 551 needs to be transferred to the peripheral heat transfer zone 552 through the heat transfer member before the peripheral heat transfer zone 552 can be heated. At least part or all of the heating element is arranged at the location of the heating zone. In some embodiments, only the core heating zone 551 is provided. In some embodiments, both the core heating zone 551 and the peripheral heat transfer zone 552 are provided. The heating element located at the heating zone can be any part of the core heating zone and the peripheral heat transfer zone. In this embodiment, the core heating area is located in the heating area.

[0069] In some specific embodiments of the present application, the heat transfer surface 1055 located at the heating zone 108 is the core heating zone 551, thereby improving heating efficiency, quickly boiling the water in the water container 102, and promptly transferring heat to the water in the water container 102 to maintain the boiling of the water in the container. In some alternative embodiments, the heat transfer surface 1055 located toward the heating zone 108 includes both the core heating zone 551 and the peripheral heat transfer zone 552, or only the peripheral heat transfer zone 552.

[0070] In some specific embodiments of the present application, Figure 2As shown, the bottom wall 1022 of the container has a first area 1023 and a second area 1024. The projection area of ​​the stewing pot 200 toward the bottom wall 1022 of the container forms the first area 1023, and the projection area of ​​the bottom wall 201 of the stewing pot toward the bottom wall 1022 of the container forms the second area 1024. The area of ​​the second area 1024 is smaller than the area of ​​the first area 1023. The projection area of ​​the heating zone 108 toward the bottom wall of the container partially overlaps with the first area 1023 or the second area 1024. The overlapping setting means that the heating zone 108 or the heating element arranged in the peripheral edge area 110 is partially located in the first area 1023 or the second area 1024, and there is partial obstruction in the positive projection direction. In this case, it is also one of the noise reduction schemes. Specifically, the overlapping part is roughly the outer side of the bottom wall of the stewing pot and the projection area of ​​the side wall of the stewing pot, that is, the area demarcated by the edge line of the first area 1023 or the second area 1024 to the edge line of the heating zone 108; further, in order to achieve the noise reduction effect, it can be selected The first area 1023 is not overlapped with the second area 1024 because the second area 1024 is roughly the range of the bottom wall 201 of the stewing pot, which has a greater impact on the noise reduction effect. Therefore, it is selected not to overlap with the second area 1024; the first area 1023 is likely to overlap with the heating area 108 because, due to the limitations of the manufacturing process, the side wall 202 of the stewing pot generally has a certain draft angle, so the side wall 202 of the stewing pot is not set straight up and down in the vertical direction. For this reason, the maximum diameter of the stewing pot 200 is often larger than the maximum diameter of the bottom wall. The larger diameter means that the second region 1024 is smaller than the first region 1023. The draft angle of the stewing pot sidewall 202 causes its diameter to gradually increase from the bottom to the top on the stewing pot bottom wall 201 side, and is arranged to be inclined outward. Because the draft angle is not too large, the outward inclination of the stewing pot sidewall 202, which blocks the heating element or heating zone, does not significantly hinder the rapid rise of bubbles. Therefore, the heating zone 108 can overlap with the first region 1023 without significantly affecting the noise reduction effect. In this embodiment, the heating zone 108 partially overlaps with both the second region 1023 and the first region 1024.

[0071] In some specific embodiments of the present application, Figure 3 As shown, a support rib 2011 is provided on the bottom wall 201 of the stewing pot. The bottom wall 201 of the stewing pot is divided into an inner side 2012 of the bottom wall located inside the support rib 2011 and an outer side 2013 of the bottom wall located between the support rib 2011 and the side wall 202 of the stewing pot. The outer side 2013 of the bottom wall includes an arc-shaped transition portion 2014. The projection of the arc-shaped transition portion 2014 and the outer side 2013 of the bottom wall to the side of the bottom wall 1022 of the container is a third area. The third area is Figure 2The annular area between the fourth region 1025 and the second region 1024 is the projection of the support ribs 2011 and the inner side of the bottom wall 2012 onto the container bottom wall 1022. The heating zone 108 partially overlaps the third region, so the heating element located on the heating zone 108 is located below the third region, that is, outside the projection of the support ribs onto the container bottom wall. By locating the heating zone or a portion of the heating element within the third region below the area between the support ribs 2011 and the side wall 202 of the stewing pot, rising bubbles generated by the heating element will only collide with the outer side of the bottom wall 2013 or the curved transition portion 2014. The bubbles are blocked by the support ribs 2011 and prevented from continuing to move toward the inner side of the bottom wall 2012. This prevents small bubbles from merging into larger ones. After a short pause on the outer side of the bottom wall 2013 or the curved transition portion 2014, the bubbles will rise to the liquid surface, thereby reducing noise.

[0072] Of course, in some specific embodiments of the present application, the heating zone below the area between the stewing pot side wall 202 and the support rib 2011 is very small, and most of the heating zone is located outside the projection of the stewing pot bottom wall 201 downwardly toward the container bottom wall 1022. This prevents bubbles generated in the heating zone from colliding with the stewing pot, thereby reducing noise.

[0073] In order to ensure that the heating area is not blocked as much as possible each time the stewing pot is taken out and put in, a limiting structure is also included. The stewing pot is placed on the limiting structure. Through the limiting structure, when the user places the stewing pot into the water container 102, the heating area 108 can be located as much as possible outside the projection of the stewing pot bottom wall 201 to the container bottom wall 1022.

[0074] In this embodiment, the limiting structure is provided on the water container 102. In a specific embodiment, as shown in FIG. Figure 1 、 2As shown, the limiting structure comprises a limiting boss 221 on the bottom wall 201 of the stewing pot. The limiting boss 221 protrudes into the water chamber 104. The inner side 2012 of the bottom wall of the stewing pot 200 engages with the limiting boss 221, while the outer side 2013 of the bottom wall is located outside the limiting boss 221. The supporting ribs 2011 are used to limit the left and right, front and back positions of the stewing pot 200, thereby minimizing the obstruction of the heating zone by the stewing pot 200. When the user removes or places the stewing pot 200, the limiting action of the limiting boss 221 ensures that the stewing pot 200 consistently blocks the heating element or heating zone on the bottom wall 1022 of the container. Furthermore, the lateral spacing 120 between the stewing pot sidewall 202 and the container sidewall 1021 is sufficiently large, thereby reducing noise. In the embodiment of the present application, the limiting structure is integrally formed with the water container 102. The integrally formed limiting structure can reduce accessories and reduce the difficulty of cleaning the inside of the water container 102. It has the advantages of simple structure, easy cleaning and low cost. At the same time, after the bottom of the stewing pot is matched with the limiting boss 221, the gap between the bottom wall 201 of the stewing pot and the water container 102 is further reduced, which can prevent bubbles from entering the bottom of the stewing pot and causing impact noise, thereby facilitating silent cooking.

[0075] Of course, in another embodiment of the present application, a removable support member is provided within the water container. The support member is placed directly within the water container, with the lower side of the support member contacting the bottom wall of the container and the upper side supporting the stewing pot. A limiting structure is provided on the support member, and the limiting structure on the support member limits the stewing pot to a certain range, thereby minimizing the stewing pot from blocking the heating zone. Of course, the projection of the support member onto the side of the container bottom wall is also located outside the heating zone, thereby preventing the bracket from blocking the heating zone. In some embodiments, the support member can partially block the heating zone, or be provided with a drainage surface, an air outlet window, etc., which can also reduce noise.

[0076] In some embodiments of the present application, a scalding ring is provided at the rim of the water container, and the stew pot is mounted on the ring, making it easier for the user to remove and place the stew pot and preventing burns. A retaining structure is provided on the ring to limit the position of the stew pot within the water container, thereby reducing the area of ​​the stew pot obstructing the heating zone. In some embodiments, the bottom wall of the stew pot is spaced apart from the bottom wall 1 of the container, so that the bottom wall of the stew pot can also be immersed in the high-temperature water, thereby heating the stew pot from all directions and improving the cooking effect.

[0077] In some embodiments of the present application, the width of the circumferential space 120 at different positions in the circumferential direction RD is different, that is, the width between the stewing pot side wall 202 and the container side wall 1021 in the width direction WD of the circumferential space 120 is different.

[0078] like Figure 1As shown, the housing 101 is provided with an operation panel 106. In this application, the side provided with the operation panel 106 is defined as the front side, and the side opposite to the side provided with the operation panel 106 is defined as the rear side. The heating area or heating element provided in the peripheral edge area 110 is arranged close to the rear side, so that the noise source is as far away from the front side as possible, thereby improving the user experience.

[0079] There is a first gap and a second gap between the container side wall 1021 and the stewing pot 200. The first gap is the gap on the side where the heating area or heating element is provided, such as the gap or width D1 of the peripheral space 120 on the rear side; the second gap is the gap on the side where no heating area or heating element is provided, such as the gap or width D2 of the peripheral space 120 on the front side; Figure 1 As shown, the width of the first gap D1 is greater than the width of the second gap D2, and the second gap is smaller, so that the thickness of the water around the stewing pot is reduced, which is conducive to the water in the water cavity 104 to quickly heat up and maintain boiling, thereby making the water temperature around the side wall 202 of the stewing pot more uniform. The stewing pot is surrounded by high-temperature water, which can improve the cooking effect.

[0080] In some alternative embodiments of the present application, multiple stewing pots may be provided, with the PTC heating element positioned near the sidewall edge of the water container. Multiple stewing pots are placed in the center of the water chamber, thereby achieving silent heating. In this case, the first area is formed by the projections of the multiple stewing pots toward the bottom wall of the container; the second area is formed by the projections of the multiple stewing pots' bottom walls toward the bottom wall of the container.

[0081] In some alternative embodiments of the present application, the water container can be elliptical, the stewing pot can be circular, and the heating zones can be arranged at both ends of the long axis of the ellipse; the water container can be rectangular, the stewing pot can be circular, and the heating zone can be arranged near one side of the rectangle. Of course, the water container can also be of other shapes.

[0082] In some embodiments of the present application, Figure 6 As shown, the heating element 105 is sealed with the water container 102, and a sealing ring 1082 is provided between the heating element 105 and the water container 102 to prevent water leakage in the heating area. The sealing ring 1082 is made of silicone material and can withstand high temperatures without sealing failure.

[0083] In order to address the technical problem that the heating element is arranged on the edge side of the bottom wall of the container, and the sealing surface is narrow due to the small edge space and narrow sealing surface, it is easy to fail to seal and cause water leakage, some embodiments of the present application improve the traditional sealing method, specifically, Figure 6 、 8As shown in Figure 10, the sealing ring 1082 includes a first sealing portion 1090 located in the thickness direction of the heating element and between the heating element and the water container. Considering that the edge of the heating element provided on the bottom wall of the container will occupy as much surface space on the bottom wall of the container as possible for heating the water in the container, the sealing surface used for sealing in the end face direction of the heating element will be very narrow. The specific value of the sealing width in some embodiments is only a few millimeters. If only relying on this traditional sealing form, when the appliance is dry-boiled without water, it will cause the seal to fail and leak. Since the first sealing portion 1090 is located in the thickness direction of the heating element and is clamped between the water container and the heating element (the so-called thickness direction is the vertical direction in the figure), it is equivalent to expanding the sealing area of ​​the sealing ring in other directions, thereby ensuring sufficient sealing width. In this way, the existence of the first sealing portion 1090 can achieve a good seal between the heating element and the water container on one side of the edge.

[0084] In order to achieve sealing in the thickness direction of the heating element, such as Figure 7 、 9 As shown, an extension portion 1091 is provided on the outer side of the bottom wall of the water container. The extension portion 1091 forms a receiving groove 1092 for mounting a heating element, and a first sealing portion 1090 is provided between the extension portion 1091 and the heating element. The extension portion 1091 can be integrally formed on the bottom wall of the container, thereby facilitating direct processing. The extension portion 1091 protrudes from the outer side of the bottom wall of the container and encloses the receiving groove 1092 for mounting the heating element. Preferably, the heating element is sealed on all sides in the thickness direction to improve the sealing effect. To this end, multiple extension portions 1091 are provided. In summary, the provision of the extension portion 1091 ensures that the first sealing portion 1090 in the thickness direction is located between the heating element and the water container, thereby forming a good seal.

[0085] like Figure 6 、 8 As shown in Figures 10 and 10, sealing ring 1082 further includes a second sealing portion 1093 located in the direction of the upper end face of the heating element. The upper end face direction is the direction of the end face of the heating element facing the heating zone. Although the sealing surface in the upper end face direction is very narrow, the provision of second sealing portion 1093 in the upper end face direction, while providing first sealing portion 1090 in the thickness direction, is beneficial for improving the sealing effect. First sealing portion 1090 and second sealing portion 1093 form a double sealing structure, ensuring that the edge heating element is sealed not only in the end face direction but also in the thickness direction, thereby improving the sealing effect of the edge heating element.

[0086] In order to achieve a good seal between the heating element and the heating area, a cover plate 1083 is further provided. The heating element 105 is fixed to the water container 102 through the cover plate 1083. The water container 102 has screw columns and the cover plate 1083 has screw holes, so that the cover plate 1083 can be screwed. Figure 6 、 8 As shown in Figures 10 and 10, the sealing ring further includes a third sealing portion 1094 located in the lower end face direction of the heating element. The lower end face direction is the end face direction of the heating element facing the cover plate. The lower end face direction is set away from the water storage chamber, so there is relatively more space here to increase the sealing effect. For this reason, a third sealing portion 1094 is provided in the lower end face direction, which can also form a double seal with the first sealing portion 1090, thereby improving the sealing effect. If the first, second, and third sealing portions are provided at the same time, they can form a triple seal together with the other two sealing portions, thereby forming a ring-shaped seal.

[0087] In some embodiments of the present application, Figure 8 、 9 As shown, since the temperature of the heating element is very high when it is working, some plastic parts may be deformed. For this reason, a heat insulation layer 1084 is provided between the heating element 105 and the cover plate 1083. The heat insulation layer is a third sealing portion 1094 so that the heat insulation layer 1084 and the sealing ring 1082 are integrally formed. Both are silicone parts. The heat insulation layer fully wraps the lower end surface of the heating element. The provision of the heat insulation layer 1084 can reduce the risk of the cover plate 1083 being melted by the heating element 105, as the cover plate is more easily deformed. Figure 10 、 11 As shown, of course, if the temperature of the heating element rises too high and needs to be dissipated, providing a heat dissipation port 1095 in the third sealing portion 1094 will be beneficial to cooling the heating element, thereby preventing the heating element from burning due to excessive temperature. For this reason, in some alternative embodiments, the third sealing portion 1094 is provided with a heat dissipation port 1095, and the lower end surface of the heating element is exposed to the side of the cover plate at the heat dissipation port 1095, thereby facilitating the timely dissipation of heat from the lower end surface of the heating element to ensure that the heating element operates within a normal working range.

[0088] In this embodiment, the first, second and third sealing portions are different parts of a component. Of course, in some embodiments, the first, second and third sealing portions may respectively correspond to one of the multiple components.

[0089] Further, such as Figure 7As shown, cover plate 1083 is provided with heat dissipation holes 1085, which connect the inner and outer spaces of the cover plate, thereby facilitating heat dissipation from the heating element and promoting heat convection between the spaces on both sides of the cover plate. The provision of heat dissipation holes 1085 and heat insulation layer 1084 prevents the water container 102 and cover plate 1083 from burning and melting due to excessive temperatures, thereby preventing the resulting seal failure and leakage. In some alternative embodiments of the present application, either heat dissipation holes 1085 or heat insulation layer 1084 may be provided.

[0090] In order to facilitate the fixing of the base 103, as shown in FIG. Figure 6 、 7 As shown, a first fixing position 1086 is further provided on the cover 1083, and a second fixing position 1031 is provided on the base 103. The first fixing position 1086 and the second fixing position 1031 are fixedly connected, and the fixed connection can be fixed by screws, thereby realizing the fixed connection between the base 103 and the water container 102; the first fixing position 1086 has a fixing column 1087 and a limiting rib 1088, and a power cord slot 1089 is provided between the fixing column 1087 and the limiting rib 1088, and the limiting rib 1088 is provided around the fixing column 1087, so that the power cord slot 1089 is surrounded by the fixing column 1087, and the power cord slot 1089 is open on one side of the shell 101; after the power cord is clamped in the power cord slot 1089, it is led out from the shell 101, so that the fixing column 1087 can be used to improve the pulling performance of the power cord and increase the service life of the power cord.

[0091] In this way, the cover 1083 not only achieves the limited fixation of the heating element, but also achieves the sealing of the heating element, and also achieves the fixed connection of the base 103, and improves the pulling performance of the power cord; this greatly improves the utilization efficiency of the structure, making the product structure simple and the installation efficient. It should be understood that the fixing column connecting the base 103 and the water container 102 also includes other fixing columns directly provided on the water container 102. For example, the fixing column on the cover 1083 can be defined as the first fixing column, and the fixing column on the water container 102 can be defined as the second fixing column. There are two second fixing columns and one first fixing column, which are distributed at a 120-degree angle to each other. In this way, by providing multiple fixing columns, the base 103 and the water container 102 can be securely fixed.

[0092] Anything not described in this application can be achieved by adopting or drawing on existing technologies.

[0093] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on the differences from other embodiments.

[0094] The foregoing is merely an embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A water-proof electric stew pot, characterized in that: include: A pot body, wherein the pot body is provided with a water cavity and a water container forming the water cavity, the water container has a container bottom wall and a container side wall, and the edge of the container bottom wall is provided with a heating area; A stewing pot is located in the water holding cavity, the stewing pot has a stewing pot side wall and a stewing pot bottom wall, and the heating area is located at the edge of the stewing pot bottom wall; a heating element, wherein at least a portion or all of the heating element is disposed at the location of the heating zone and contacts the liquid in the water holding chamber through the heating zone to heat the liquid in the water holding chamber; The sealing ring includes a first sealing portion located in the thickness direction of the heating element and between the heating element and the water container.

2. The water-proof electric stew pot according to claim 1, characterized in that: include: An extension portion is provided on the outer side of the bottom wall of the water container, and the extension portion forms a receiving groove for installing the heating element. The first sealing portion is provided between the extension portion and the heating element.

3. The water-proof electric stew pot according to claim 1, characterized in that: The sealing ring further includes a second sealing portion located in the upper end surface direction of the heating element, and the upper end surface direction is the end surface direction of the heating element facing the heating zone.

4. The water-proof electric stew pot according to claim 1, characterized in that: It also includes a cover plate, and the heating element is fixed on the water container through the cover plate; The sealing ring further includes a third sealing portion located in the lower end surface direction of the heating element, and the lower end surface direction is the end surface direction of the heating element toward the cover plate.

5. The water-proof electric stew pot according to claim 4, characterized in that: A heat insulating layer is provided between the heating element and the cover plate. The heat insulating layer is the third sealing portion so that the heat insulating layer and the sealing ring are integrally formed. The heat insulating layer completely wraps the lower end surface of the heating element.

6. The water-proof electric stew pot according to claim 4, characterized in that: The third sealing portion is provided with a heat dissipation opening, and the lower end surface of the heating element is exposed toward one side of the cover plate at the heat dissipation opening.

7. The water-proof electric stew pot according to claim 4, characterized in that: The cover plate is provided with heat dissipation holes, and the heat dissipation holes are connected to the inner and outer spaces of the cover plate.

8. The water-proof electric stew pot according to claim 1, characterized in that: The heating element comprises a heat conducting element and a PTC heating sheet. The heat conducting element is an extruded shell. The PTC heating sheet is arranged in a fixed cavity in the heat conducting element.

9. The water-proof electric stew pot according to claim 1, characterized in that: The heating zone is in an elongated strip shape, and the length direction of the heating zone extends toward the circumferential direction of the peripheral spacing space.

10. The water-proof electric stew pot according to claim 1, characterized in that: The bottom wall of the container forms a heating trough at the heating zone, and the heating element constitutes the bottom wall of the heating trough.

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