Electric stewpot

Abstract

The utility model relates to an electric stewpot to solve the technical problem that when an existing electric stewpot is used for cooking, the cooking efficiency is greatly sacrificed due to the fact that overflowing is prevented by reducing firepower. Comprising a pot body which is provided with a heating device and a containing cavity. The ceramic inner container is provided with a cooking cavity and arranged in the containing cavity, and the heating device can heat the ceramic inner container; the cover body covers the ceramic inner container, and a sealing device is arranged between the edge of the cover body and the opening edge of the ceramic inner container; the cover body is provided with a jet flow valve body, the jet flow valve body comprises a steam exhaust channel, the steam exhaust channel is provided with a front channel communicated with the cooking cavity and a rear channel communicated with the front channel, and a contraction channel with a contracted section is arranged between the front channel and the rear channel. According to the electric stewpot, overflow prevention can be achieved without sacrificing the cooking efficiency, and cooking can be completed quickly and well.

Description

Technical Field

[0001] This application belongs to the field of kitchen appliance technology, and in particular relates to an electric slow cooker. Background Technology

[0002] Currently, in the field of cooking appliances, especially in heating and cooking equipment such as rice cookers and slow cookers, the steam generated during cooking is often accompanied by a large number of bubbles. If these bubbles do not burst in time, they may cause the cooked food to overflow, affecting the user experience and even posing safety hazards.

[0003] The inner pot of an electric slow cooker is made of ceramic, which has greater thermal inertia and better heat retention compared to the metal inner pot of a rice cooker. This is one of the key factors that allows it to make food softer, more fragrant, and more delicious. However, the disadvantages are also obvious. Electric slow cookers require low heat and slow simmering to produce delicious soups, which makes the cooking efficiency too low, especially when cooking ingredients that are prone to overflowing, such as congee, where the cooking efficiency may decrease further.

[0004] Existing solutions for preventing overflow in electric slow cookers involve further reducing the heat to avoid overflow. However, electric slow cookers already have the disadvantage of long cooking times, and reducing the heat further amplifies the cooking time, requiring a lot of time to complete the cooking process, resulting in a poor user experience. Summary of the Invention

[0005] This application provides an electric slow cooker to solve the technical problem that existing electric slow cookers greatly sacrifice cooking efficiency by reducing the heat to prevent overflow.

[0006] One embodiment of this application employs the following technical solution:

[0007] An electric slow cooker includes a pot body with a heating device and a receiving cavity; a ceramic inner pot with a cooking cavity disposed within the receiving cavity, the heating device capable of heating the ceramic inner pot; a lid covering the ceramic inner pot, the lid having a sealing device between its edge and the rim of the ceramic inner pot; and a jet valve body on the lid body, the jet valve body including a steam exhaust channel having a front channel communicating with the cooking cavity and a rear channel communicating with the front channel, the front channel and the rear channel having a contraction channel with a narrowing cross section.

[0008] In a preferred embodiment of this invention, the jet valve body further includes a mixing chamber, which has an exhaust port communicating with the outside. The exhaust channel is located inside the mixing chamber, and the exhaust end of the rear channel is located inside the mixing chamber.

[0009] In a preferred embodiment of this invention, the mixing chamber has a drain hole and a drain valve for opening or closing the drain hole, wherein the drain hole connects the mixing chamber and the cooking chamber when open.

[0010] In a preferred embodiment of this invention, the drain valve is integrally formed with the exhaust pipe that forms the exhaust channel. The exhaust pipe is floatingly disposed on the jet valve body and has a first position of floating up to close the drain hole and a second position of falling back to open the drain hole.

[0011] In a preferred embodiment of this example, the jet valve body has an inlet pipe, the inlet end of which is connected to the atmosphere and the outlet end of which is connected to the exhaust channel. The position of the outlet end of the inlet pipe in the exhaust channel corresponds to the position of the contraction channel in the exhaust channel.

[0012] In a preferred embodiment of this invention, the jet valve body is disposed on the top handle of the cover, and the top handle has a grip portion extending to one side.

[0013] In a preferred embodiment of this invention, the sealing device is a water-sealed structure, and the cover and the ceramic inner liner are sealed together by a water seal.

[0014] In a preferred embodiment of this invention, the sealing device is a silicone component, and the cover and the ceramic inner liner are sealed together by the silicone component.

[0015] In a preferred embodiment of this invention, the ceramic inner liner or pot body is provided with a fastening device, which cooperates with the lid to tightly cover the ceramic inner liner.

[0016] In a preferred embodiment of this example, the cover has a conical surface, and the air outlet of the rear channel is oriented towards the downward side of the inclined direction of the conical surface.

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

[0018] In this application, after the jet valve body is installed, the steam in the cooking chamber will be discharged through the exhaust channel. The steam first passes through the front channel connected to the cooking chamber, and then through the contraction channel with a narrow cross-section. Due to the narrowing cross-section of the contraction channel, under a certain pressure, the steam flow in the exhaust channel can be accelerated by the contraction channel, forming a high-speed jet flow in the rear channel. At the same time, the pressure will decrease, making the steam easier to condense. More importantly, the high-speed jet flow in the rear channel changes the relative motion state between the bubbles and the steam. Due to the increase in steam velocity, the bubbles will be subjected to a greater drag force. This drag force will cause some bubbles to break into liquid, thus achieving the anti-overflow effect. The lid of the electric slow cooker is sealed to the ceramic inner pot by its own weight. In order for the contraction channel to form an effective jet flow, a certain pressure needs to be formed in the cooking chamber. For this reason, a sealing device is provided between the lid and the edge of the ceramic inner pot to prevent air leakage between the lid and the ceramic inner pot. Therefore, the electric slow cooker of this application can achieve anti-overflow without sacrificing cooking efficiency, and can complete cooking quickly and well.

[0019] In some preferred embodiments, after the jet stream in the rear channel enters the mixing chamber, the steam velocity gradually decreases and the pressure gradually increases. This is beneficial to the stabilization and redistribution of bubbles, so that the bubbles are effectively dispersed and broken in the mixing chamber, thereby avoiding the accumulation and overflow of bubbles at the exhaust port.

[0020] In some preferred embodiments, the connection between the mixing chamber and the cooking chamber can be controlled by opening and closing the drain hole of the drain valve. When the drain hole is open, the mixing chamber and the cooking chamber are connected, and the liquid in the mixing chamber can flow back into the cooking chamber, thereby releasing the space in the mixing chamber. When the drain hole is closed, the mixing chamber and the cooking chamber are isolated, and the cooking chamber can be kept under a certain pressure, thereby forming a high-speed jet flow in the steam exhaust channel, thus ensuring the overflow prevention effect.

[0021] In some preferred embodiments, when the steam generated in the cooking chamber reaches a certain amount, the pressure inside the cooking chamber pushes the vent pipe to the first position, thereby closing the drain hole and preventing the steam in the cooking chamber from being discharged through the drain hole and the mixing chamber, as well as preventing the liquid in the mixing chamber from flowing back. When the pressure inside the cooking chamber drops to a certain value, the vent pipe will descend to the second position under its own gravity, thereby opening the drain hole, and the liquid accumulated in the mixing chamber will flow back into the cooking chamber through the drain hole.

[0022] In some preferred embodiments, during operation, the jet stream at the contraction channel generates negative pressure, thereby drawing in external atmosphere through the inlet pipe into the exhaust channel, where it mixes and then enters the mixing chamber from the rear channel. Unlike Embodiment 1, this embodiment draws in external atmosphere, which has a larger temperature difference with the steam, resulting in a certain condensation effect on the steam. This dilutes the viscous liquid, reduces the surface tension of the formed bubbles, and makes the bubbles easier to break.

[0023] In some preferred embodiments, by integrating the jet valve body into the top handle of the lid, it is possible to avoid making too many holes in the lid of the electric slow cooker, thus not reducing the structural strength of the lid. This is especially true for lids made of ceramic material, where fewer holes facilitate manufacturing and processing while also ensuring structural strength. After integrating the jet valve body into the top handle, a grip can be provided for easy holding by the user. The grip extends to one side of the top handle, which can reduce the temperature of the grip and prevent the user from being burned.

[0024] In some preferred embodiments, since ceramic materials are not convenient for processing fastening structures such as clips and screws, water seals are particularly suitable for sealing between the inner liner and the lid made of ceramic materials.

[0025] In some preferred embodiments, the silicone part has excellent elastic deformation ability and good high temperature resistance. It can be directly clamped onto the cover by utilizing its elastic deformation ability, without the need to process fastening structures such as buckles or screws on the cover or ceramic liner. It is easy to install and suitable for sealing ceramic liner or ceramic cover.

[0026] In some preferred embodiments, the clamping device can be pressed against the lid during cooking to prevent the lid from being lifted up under high pressure. After cooking is finished, the clamping device can be removed from the lid to facilitate opening the lid.

[0027] In some preferred embodiments, after the high-speed jet stream exits from the rear channel, the broken bubbles turn into liquid and are ejected from the rear channel into the mixing chamber along with the jet stream. Since the outlet end of the rear channel is oriented with the inclined direction of the conical surface facing downwards, the liquid carried in the jet stream is more easily separated from the gas, thereby improving the bubble breaking efficiency. Attached Figure Description

[0028] The accompanying drawings, which are included to provide a further understanding of this application and form part of this application, illustrate exemplary embodiments and are used to explain this application, but do not constitute an undue limitation of this application. In the drawings:

[0029] Figure 1 This is a cross-sectional view of the electric slow cooker provided in Embodiment 2 of this application;

[0030] Figure 2 This is a top view of the electric slow cooker provided in Embodiment 1 of this application;

[0031] Figure 3 This is a cross-sectional view of the jet valve body provided in Embodiment 1 of this application;

[0032] Figure 4 This is a cross-sectional view of the exhaust passage provided in Embodiment 1 of this application;

[0033] Figure 5 This is a cross-sectional view of the exhaust passage provided in Embodiment 1 of this application, in the direction of the inlet.

[0034] Figure 6 This is a cross-sectional view of the jet valve body provided in Embodiment 2 of this application;

[0035] Figure 7 This is a cross-sectional view of the exhaust passage provided in Embodiment 2 of this application.

[0036] in,

[0037] Jet valve body 10; valve cover 11; mixing chamber 12; exhaust port 13; exhaust channel 14; lower sealing ring 15; inlet pipe 16; drain valve 17; drain hole 18; front channel 141; contraction channel 142; rear channel 143; inlet 144; contraction section 145; upstream side 146; downstream side 147; first exhaust section 1411; second exhaust section 1412;

[0038] 1. Pot body; 2. Ceramic inner liner; 3. Lid; 5. Heating device; 21. Water tank; 33. Top handle; Detailed Implementation

[0039] To more clearly illustrate the overall concept of this application, a detailed explanation is provided below with reference to the accompanying drawings.

[0040] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0041] Furthermore, it should be understood in the description of this application that the terms "top", "bottom", "inner", "outer", "axial", "radial", "circumferential", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a communication connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] In this application, unless otherwise expressly specified and limited, the "above" or "below" of the second feature can mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. In the description of this specification, references to terms such as "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described can be combined in any suitable manner in one or more embodiments or examples.

[0044] This application proposes an electric slow cooker, such as Figure 1-7 As shown, the electric slow cooker includes a pot body 1, which is equipped with a heating device 5 and a receiving cavity; a ceramic inner pot 2, which has a cooking cavity and is located within the receiving cavity, and the heating device 5 can heat the ceramic inner pot 2; a lid 3 covering the ceramic inner pot 2, and a sealing device is provided between the edge of the lid 3 and the rim of the ceramic inner pot 2; a jet valve body 10 is provided on the lid 3, which includes a steam exhaust channel 14, which has a front channel 141 communicating with the cooking cavity and a rear channel 143 communicating with the front channel 141, and a contraction channel 142 with a narrowed cross section between the front channel 141 and the rear channel 143.

[0045] The inner pot of the electric slow cooker is made of ceramic, which has a higher thermal inertia and better heat retention compared to the metal inner pot of the rice cooker. The heating element can have a lower power and can maintain the ceramic inner pot at a high temperature for a long time, making the food cooked in the slow cooker softer, more fragrant, and more delicious. It is suitable for making various soups. When cooking porridge, existing electric slow cookers tend to produce a lot of bubbles in the cooking chamber, which can easily cause overflow. Current solutions are to further reduce the heat to prevent overflow. However, electric slow cookers already have the disadvantage of long cooking time, and reducing the heat further amplifies the cooking time, requiring a lot of time to complete the cooking, resulting in a poor user experience.

[0046] After the jet valve body is installed, the steam in the cooking chamber will be discharged through the exhaust channel. The steam first passes through the front channel 141 connected to the cooking chamber, and then through the contraction channel 142 with a narrow cross-section. Due to the narrow cross-section of the contraction channel 142, under a certain pressure, the steam flow in the exhaust channel can be accelerated by the contraction channel, forming a high-speed jet flow in the rear channel. At the same time, the pressure will decrease, making the steam easier to condense. More importantly, the high-speed jet flow in the rear channel changes the relative motion state between the bubbles and the steam. Due to the increase in steam velocity, the bubbles will be subjected to a greater drag force. This drag force will cause some bubbles to break into liquid, thus achieving the anti-overflow effect. The lid of the electric slow cooker is sealed to the ceramic inner pot by its own weight. In order for the contraction channel to form an effective jet flow, a certain pressure needs to be formed in the cooking chamber. For this reason, a sealing device is provided between the lid 3 and the edge of the ceramic inner pot 2 to prevent air leakage between the lid 3 and the ceramic inner pot. Therefore, the electric slow cooker of this application can achieve anti-overflow without sacrificing cooking efficiency, and can complete cooking quickly and well.

[0047] The jet valve body of this application can have various specific embodiments, which will now be described in detail with reference to the accompanying drawings.

[0048] In a preferred embodiment of this application, such as Figure 3 , 6 As shown, the jet valve body 10 also includes a mixing chamber 12, which has a steam vent 13 communicating with the outside. A steam venting channel 14 is located within the mixing chamber 12, with the outlet end of the rear channel situated within the mixing chamber 12. During cooking, the steam generated in the cooking chamber passes through the steam venting channel, the mixing chamber 12, and the steam vent 13 sequentially, thereby discharging the steam from the cooking chamber to the outside. It should be understood that in another embodiment of this application, a mixing chamber may not be provided, in which case steam is directly discharged to the outside through the steam venting channel.

[0049] In the aforementioned technique of using jet streams for bubble breaking, the jet stream has a very high velocity and is directly injected into the exhaust port. Combined with the limited length of the steam outlet channel, this results in liquid being easily carried away and ejected directly from the steam outlet channel during the outward injection process, limiting the overflow prevention effect. Therefore, after the jet stream enters the mixing chamber in the rear channel, the steam velocity gradually decreases while the pressure gradually increases. This promotes bubble stabilization and redistribution, allowing the bubbles to be effectively dispersed and broken up within the mixing chamber, thus preventing bubble accumulation and overflow at the exhaust port.

[0050] like Figure 2-5In the first embodiment shown, the jet valve body 10 includes a valve cover 11 and a valve seat. The valve cover 11 is provided with a steam vent 13. A mixing chamber 12 is formed between the valve seat and the valve cover 11. A steam vent pipe is provided in the mixing chamber 12. During operation, one end of the steam vent pipe is connected to the cooking chamber and the other end is connected to the mixing chamber 12. Steam can enter from the steam vent pipe, be mixed in the mixing chamber 12, and finally be discharged from the steam vent 13 at the valve cover 11.

[0051] like Figure 6-7 In the second embodiment shown, the jet valve body 10 is provided with a steam vent 13, and a lower sealing ring 15 is provided on the lower side of the jet valve body 10. The lower sealing ring 15 is used to abut against the cover 3 of the cooking appliance to achieve a seal between the jet valve body 10 and the cover 3. The space between the jet valve body 10 and the cover 3 is a mixing chamber 12. A steam vent pipe is provided inside the jet valve body 10, and a steam vent channel 14 is provided inside the steam vent pipe. One end of the steam vent channel 14 is connected to the cooking chamber of the cooking appliance, and the other end is connected to the mixing chamber 12. An inlet pipe 16 is also provided. One end of the inlet pipe 16 is located in the outside atmosphere, and the other end is connected to the steam vent channel 14. During operation, steam can enter from the steam vent pipe, pass through the mixing chamber 12, and be discharged from the steam vent 13.

[0052] In Example 1, the steam inlet and outlet directions of the front passage 141, the contraction passage 142, and the rear passage 143 of the exhaust pipe are the same, while in Example 2, the steam inlet and outlet directions of the front passage 141, the contraction passage 142, and the rear passage 143 of the exhaust pipe are not the same.

[0053] In some embodiments of this application, a negative pressure generated by the constriction channel 142, located at the inlet 144, allows gas outside the exhaust channel 14 to be introduced into the exhaust channel 14 through the inlet 144. It should be understood that in another embodiment of this application, the inlet may not be provided, in which case external gas will not be drawn into the exhaust channel.

[0054] As attached Figure 5 In the first embodiment shown, an exhaust pipe is included to form an exhaust passage 14. An inlet 144 is opened on the side wall of the exhaust pipe, with one end of the inlet 144 connected to the mixing chamber 12 and the other end connected to the exhaust passage 14. During operation, the inlet 144 draws in gas from the mixing chamber 12 into the exhaust passage 14 under the negative pressure generated by the contraction passage 142.

[0055] There are two inlets 144, which are respectively installed through the side wall of the exhaust pipe. In some other alternative embodiments, the number of inlets is not limited.

[0056] After the jet stream enters the rear channel, the gas drawn in through the inlet alters the flow state and velocity distribution of the fluid in the exhaust channel. When external air mixes with the bubble-containing steam, the difference in velocity and direction generates shear forces and turbulence, which act on the bubble surface, making it easier to break up. Furthermore, the introduction of external air may increase the intensity of turbulence in the fluid, further improving the efficiency of bubble breakup.

[0057] The introduction of external air helps disperse air bubbles in the fluid entering the mixing chamber into a wider fluid region. As the bubbles mix with the external air, they are subjected to fluid forces from different directions, which helps break up any aggregation between the bubbles and make them more evenly distributed in the fluid. This dispersion helps reduce the risk of bubbles agglomerating and overflowing in subsequent processes.

[0058] As attached Figure 6-7 In the second embodiment shown, the jet valve body 10 includes an inlet pipe 16. The inlet end of the inlet pipe 16 is connected to the atmosphere, and its outlet end is connected to the exhaust channel 14. That is, one end of the inlet pipe 16 is connected to the inlet port 144, and the other end is located in the external atmosphere. The position of the inlet port 144 in the exhaust channel 14 corresponds to the position of the contraction channel 142 in the exhaust channel 14. During operation, the jet flow at the contraction channel will generate negative pressure, thereby drawing in the external atmosphere through the inlet pipe into the exhaust channel, mixing it, and then entering the mixing chamber from the rear channel. Unlike the first embodiment, this embodiment draws in the external atmosphere. The temperature difference between the external atmosphere and the steam is large, which has a certain condensation effect on the steam, thereby diluting the viscous liquid and reducing the surface tension of the formed bubbles, making the bubbles easier to break.

[0059] In Embodiments 1 and 2, a contraction section 145 forming a contraction channel 142 is included. The steam outlet of the contraction section 145 extends into the rear channel 143, and the inlet 144 communicates with the rear channel 143. The rear channel 143 has an upstream side 146 and a downstream side 147 bounded by the location of the steam outlet of the contraction section 145. In Embodiment 1 of this application, as shown... Figure 5 As shown, the inlet 144 is located on the upstream side 146 of the rear channel 143, and the cross-sectional area of ​​the upstream side 146 is greater than or equal to the cross-sectional area of ​​the inlet 144. By extending the steam outlet of the contraction section into the rear channel, the rear channel can be divided into an upstream side and a downstream side. The upstream side is connected to the inlet, and the introduced air enters the upstream side and then enters the downstream side. Since the inlet is located on the upstream side of the rear channel, and the cross-sectional area of ​​the upstream side is greater than or equal to the cross-sectional area of ​​the inlet, this helps the external air to be more evenly dispersed into the fluid when entering the rear channel. The thorough mixing of external air and fluid not only promotes bubble dispersion but also increases the contact area between the bubbles and the fluid, thereby improving the efficiency of bubble breakage.

[0060] In Embodiment 2 of this application, as Figure 7 As shown, the system includes a front exhaust pipe forming a front channel 141, which has a first exhaust section 1411 and a second exhaust section 1412. The airflow directions of the first exhaust section 1411 and the second exhaust section 1412 are different. Specifically, the first exhaust section 1411 and the second exhaust section 1412 are set at a 90-degree angle, thereby changing the direction of the jet stream ejected from the constriction channel and the rear channel connected to the front channel, thus altering the mixing effect in the mixing chamber. The exhaust end of the rear channel is horizontally positioned in the mixing chamber, which facilitates the sinking of the juice ejected from the rear channel under gravity, while the gas floats upward, further enhancing the turbulence of the airflow and accelerating the dispersion and breakup of bubbles in the mixing chamber.

[0061] It should be understood that the so-called horizontal arrangement of the rear channel's air outlet in the mixing chamber does not mean that the valve body must be installed vertically on the lid of the cooking appliance to ensure that the rear channel's air outlet is horizontally arranged. Alternatively, the valve body can be installed at an angle so that the rear channel's air outlet is inclined relative to the cooking appliance. Here, horizontal arrangement does not necessarily mean horizontal direction, but rather relative to the valve body's mixing chamber.

[0062] Specifically, in embodiment two, the axis of the air outlet of the rear channel 143 is arranged at an angle to the axis of the exhaust port 13. Moreover, the angle setting makes the air outlet of the rear channel at least partially misaligned with the exhaust port, preventing fluid from being directly ejected from the exhaust port.

[0063] like Figure 6-7 As shown in Embodiment 2, the projection of the outlet end of the rear channel 143 in the mixing chamber 12 is offset from the projection of the exhaust port 13 in the mixing chamber 12. Furthermore, the axis of the outlet end of the rear channel 143 is perpendicular to the axis of the exhaust port 13. This perpendicularity ensures that the fluid, as it flows out of the exhaust channel and towards the exhaust port, experiences at least one bend. The bend forces the fluid to change its flow direction, increasing turbulence within the fluid, which helps to disrupt the stability of the foam and promotes its breakage. Moreover, at the bend, due to centrifugal force, steam and liquid are more easily separated, thereby promoting gas-liquid separation and improving exhaust efficiency.

[0064] Some preferred embodiments of this application, such as Figure 1-3As shown, the mixing chamber 12 has a drain hole 18 and a drain valve 17 for opening or closing the drain hole 18. When the drain hole 18 is open, it connects the mixing chamber 12 and the cooking chamber. The connection between the mixing chamber and the cooking chamber can be controlled by opening and closing the drain hole through the drain valve. When the drain valve opens the drain hole, the mixing chamber and the cooking chamber are connected, and the liquid in the mixing chamber can flow back into the cooking chamber, thereby releasing the space in the mixing chamber. When the drain valve closes the drain hole, the mixing chamber and the cooking chamber are isolated, and the cooking chamber can be kept under a certain pressure, thereby forming a high-speed jet flow in the steam exhaust channel, thus ensuring the overflow prevention effect.

[0065] This application proposes the following two specific implementation methods for the drain valve, such as... Figure 1 , 6 The first type of drain valve shown has a drain hole 18 on the valve seat and a drain valve 17 that is floating on the valve seat to open or close the drain hole 18. When the pressure in the cooking chamber rises to a certain threshold, the drain valve can be pushed upward to close the drain hole, preventing steam backflow in the mixing chamber. When the pressure in the cooking chamber drops to a certain threshold, the drain valve descends under its own weight and the weight of the liquid in the mixing chamber to open the drain hole, allowing the liquid accumulated in the mixing chamber to fall back into the cooking chamber through the drain hole. Furthermore, a portion of the valve seat is sunken to form a collection tank communicating with the mixing chamber, so that the mixing chamber can collect condensate and liquid that falls back after bubbles break. The drain hole 18 is located on the bottom wall of the collection tank to facilitate liquid backflow.

[0066] like Figure 2 , 3 The second type of drain valve shown is integrally formed with the drain pipe forming the steam exhaust channel 14. The drain pipe is floatingly mounted on the jet valve body 10, having a first position where it floats up to close the drain hole 18 and a second position where it falls back to open the drain hole 18. When the steam in the cooking chamber reaches a certain amount, the pressure inside the cooking chamber pushes the drain pipe to the first position, thereby closing the drain hole and preventing the steam in the cooking chamber from being discharged through the drain hole and the mixing chamber, and also preventing the liquid in the mixing chamber from flowing back. When the pressure inside the cooking chamber drops to a certain value, the drain pipe will fall to the second position under its own gravity, thereby opening the drain hole, and the liquid accumulated in the mixing chamber flows back into the cooking chamber through the drain hole. To achieve integral forming of the drain valve and the drain pipe, the drain pipe can be entirely made of silicone, and a sealing lip can be provided on the side of the drain pipe located in the cooking chamber, thereby opening and closing the drain hole through the sealing lip.

[0067] In some preferred embodiments of this application, such as Figure 2As shown, the jet valve body is mounted on the top handle 33 of the lid 3, and the top handle 33 has a grip portion (not shown) extending to one side. By integrating the jet valve body into the top handle 33 of the lid 3, it is possible to avoid opening too many holes in the lid 3 of the electric slow cooker, thus not reducing the structural strength of the lid. This is especially true for lids made of ceramic material, where fewer holes facilitate manufacturing and processing while ensuring structural strength. After integrating the jet valve body into the top handle 33, a grip portion can be provided for easy gripping by the user. The grip portion extends to one side of the top handle 33, which can reduce the temperature of the grip portion and prevent burns to the user.

[0068] In some preferred embodiments of this application, the sealing device between the ceramic inner liner 2 and the cover can be implemented using the following technical solutions.

[0069] Specifically, in a preferred embodiment, such as Figure 2 As shown, the sealing device described above is a water-sealed structure. The lid 3 and the ceramic inner liner 2 are sealed together by a water seal. Since it is inconvenient to process fastening structures such as buckles and screws into ceramic materials, the water seal is particularly suitable for sealing between the ceramic inner liner and the lid. It is only necessary to open a water-collecting groove 21 at the rim of the ceramic inner liner 2, and the lid fits into the water-collecting groove 21. Water can be added to the water-collecting groove 21 to achieve a water seal. Of course, the condensate formed on the inner wall of the lid during cooking can also be collected into the water-collecting groove 21 to achieve a water seal.

[0070] In another embodiment, the sealing device is a silicone component, and the cap and the ceramic inner liner are sealed together by the silicone component. The silicone component has good elastic deformation ability and good high temperature resistance. It can be directly clamped onto the cap by utilizing its elastic deformation ability, without the need to process fastening structures such as buckles or screws on the cap or ceramic inner liner. It is easy to install and suitable for sealing ceramic inner liner or ceramic cap.

[0071] As mentioned above, forming a jet stream requires a certain pressure inside the cooking cavity. If the pressure is insufficient, the bubble-breaking effect of the jet valve will be poor. At the same time, since the lid of the existing electric slow cooker only relies on its own weight to press against the ceramic inner pot, if the pressure inside the cooking cavity is too high and exceeds the weight of the lid, it is easy to push the lid off, causing the bubbles in the cooking cavity to overflow from the gap between the lid and the ceramic inner pot.

[0072] To prevent the lid from being lifted and to maintain a certain pressure within the cooking cavity, in some preferred embodiments of this application, a clamping device is provided on the ceramic inner pot or the pot body. The clamping device cooperates with the lid to ensure that the lid tightly covers the ceramic inner pot. The clamping device can press against the lid during cooking, thereby preventing the lid from being lifted under high pressure. After cooking, the clamping device can be removed from the lid, thus facilitating the opening of the lid.

[0073] Some preferred embodiments of this application, such as Figure 1 As shown, the cover 3 has a conical surface, and the outlet end of the rear channel 143 faces downwards along the inclined direction of the conical surface. After the high-speed jet is ejected from the rear channel, the broken bubbles become liquid and are ejected into the mixing chamber along with the jet. Since the outlet end of the rear channel faces downwards along the inclined direction of the conical surface, the liquid carried in the jet is more easily separated from the gas, thereby improving the bubble breaking efficiency.

[0074] In some preferred embodiments of this application, the cover has a mounting hole, and the jet valve body can be detachably installed in the mounting hole; the detachable installation facilitates the cleaning of the valve body, thereby keeping the jet valve body in a clean and healthy environment.

[0075] For any parts not mentioned in this application, existing technologies may be used or referenced.

[0076] The various embodiments in this specification are described in a progressive manner. The same or similar parts between the various embodiments can be referred to each other. Each embodiment focuses on describing the differences from other embodiments.

[0077] The above description is merely an embodiment of this application and is not intended to limit the scope of this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of the claims of this application.

Claims

1. An electric slow cooker, characterized in that: The pot body is equipped with a heating device and a receiving cavity; A ceramic inner pot, wherein the ceramic inner pot has a cooking cavity and is disposed within the receiving cavity, and the heating device is capable of heating the ceramic inner pot; A cover body, which fits over the ceramic inner liner, and a sealing device is provided between the edge of the cover body and the rim of the ceramic inner liner; The cover is provided with a jet valve body, which includes a steam exhaust channel. The steam exhaust channel has a front channel communicating with the cooking cavity and a rear channel communicating with the front channel. There is a contraction channel with a narrowing cross section between the front channel and the rear channel.

2. An electric slow cooker as described in claim 1, characterized in that, The jet valve body also includes a mixing chamber, which has an exhaust port communicating with the outside. The exhaust channel is located inside the mixing chamber, and the exhaust end of the rear channel is located inside the mixing chamber.

3. An electric slow cooker as described in claim 2, characterized in that, The mixing chamber has a drain hole and a drain valve for opening or closing the drain hole, the drain hole connecting the mixing chamber and the cooking chamber when open.

4. An electric slow cooker as described in claim 3, characterized in that, The drain valve is integrally formed with the exhaust pipe that forms the exhaust channel. The exhaust pipe is floatingly disposed on the jet valve body and has a first position of floating up to close the drain hole and a second position of falling back to open the drain hole.

5. An electric slow cooker as described in claim 1, characterized in that, The jet valve body has an inlet pipe, the inlet end of which is connected to the atmosphere, and the outlet end of which is connected to the exhaust channel. The position of the outlet end of the inlet pipe in the exhaust channel corresponds to the position of the contraction channel in the exhaust channel.

6. An electric slow cooker as described in claim 1, characterized in that, The jet valve body is mounted on the top handle of the cover, and the top handle has a grip portion extending to one side.

7. An electric slow cooker as described in claim 1, characterized in that, The sealing device is a water-sealed structure, and the cover and the ceramic inner liner are sealed together by a water seal.

8. An electric slow cooker as described in claim 1, characterized in that, The sealing device is a silicone component, and the cover and the ceramic inner liner are sealed together by the silicone component.

9. An electric slow cooker as described in claim 1, characterized in that, The ceramic inner liner or pot body is provided with a fastening device, which cooperates with the lid to make the lid tightly cover the ceramic inner liner.

10. An electric slow cooker as described in claim 2, characterized in that, The cover has a conical surface, and the air outlet of the rear channel is oriented towards the downward side of the inclined direction of the conical surface.

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