A cooking appliance with automatic water discharge

Abstract

The utility model discloses a kind of cooking utensils of automatic drainage, including pot body and pot cover, the bottom of the pot body is equipped with heating device, the inner pot is equipped in the pot body, the middle area of inner pot bottom wall is equipped with drainage valve assembly;The heating device is equipped with containing passage corresponding drainage valve assembly, the outer periphery of the containing passage is equipped with multiple temperature sensing elements, multiple temperature sensing elements resist the inner pot bottom wall of the outer periphery of drainage valve assembly, the heating zone of the heating device is outwardly extended to be arranged from the outer edge of multiple temperature sensing elements, to solve the problem that the bottom of existing cooking utensil with drainage structure cannot be accurately temperature measured.

Description

Technical Field

[0001] This utility model belongs to the field of kitchen appliance technology, specifically relating to a cooking appliance with automatic drainage. Background Technology

[0002] There are two main existing technologies for achieving low-sugar rice cooking: one type does not have a drainage structure in the inner pot. Instead, a steamer is placed inside the inner pot, and the rice is placed in the steamer. During cooking, boiling water enters the steamer to rinse the rice grains, or a lifting device allows the rice grains to come into contact with the water and soak, thereby draining the sugar and starch from the rice into the water. The rice is then separated from the water and cooked by steaming to achieve the low-sugar rice cooking function; examples include patents: 202020959811.5 and 201410261845.6. In this structure, the rice is placed in the steamer, and due to the limited water volume, the amount of rice cooked is very small, and the amount of sugar and starch removed by rinsing or soaking is very limited, resulting in a poor low-sugar effect. Furthermore, since the rice is steamed through the rice water at the bottom of the inner pot after separation, meaning the bottom of the inner pot is used for boiling water, the temperature requirement is not high. Therefore, it usually does not have a temperature measuring structure or uses the temperature measuring structure of a conventional rice cooker.

[0003] Another type is the automatic drainage cooking appliance, which usually has a draining component at the bottom of the inner pot. The draining valve removes the starchy rice water, thereby reducing the sugar content of the rice and achieving a better low-sugar effect. It has two forms. One is to add a filter chamber to the inner pot, with a space between the filter chamber and the inner pot. The rice grains in the filter chamber are rinsed multiple times or soaked in a large amount of water, and then the rice water in the filter chamber is drained. The rice water in the space is then steamed at high temperature to achieve low-sugar rice cooking, such as patent numbers 201720571097.0 and 201911194711.6. This structure is more complex and changes the user's operating habits, requiring the cleaning of an additional inner pot. Since it still separates rice and water and steams rice through the rice water at the bottom of the inner pot, the bottom of the inner pot is used for boiling water cooking, so the temperature requirement is not high. Because a draining component is added to the bottom, a bottom temperature measuring structure is usually not installed. Another method involves cooking directly in the inner pot. Water is first injected into the inner pot through a water inlet structure for soaking or heated soaking, after which the rice water is drained to remove starch and sugar from the rice. Then, water is injected a second time, and the rice is cooked a second time through temperature and water volume control, achieving low-sugar rice cooking. This structure does not require a steamer or filter, making it simple for users and achieving good low-sugar results, as shown in the published patent 201810234008.2. However, as its specification discloses, because a mesh surface (filter) is placed at the bottom of the inner container, the rice does not directly contact the bottom surface of the inner container. Although it requires precise temperature detection of the ingredients to achieve low-sugar rice cooking, if the temperature is measured at the bottom, the mesh surface (filter) will affect the accuracy of the temperature measurement.

[0004] Furthermore, Chinese patent 201720702378.5 discloses a temperature measurement method that places the temperature sensor within the heating zone. While this method can release the central area of ​​the bottom of the inner pot, placing the temperature sensor within the heating zone not only complicates installation and fixation, but also makes the sensor prone to aging and failure. Additionally, the sensor is subject to heating from the heating zone and excessive heat radiation and conduction, resulting in large temperature corrections and inaccurate temperature measurement. Moreover, placing the temperature sensor within the heating zone, such as the winding area of ​​an electromagnetic coil, affects the winding uniformity and area, increases winding complexity, and severely impacts the heating effect and efficiency at the bottom, affecting the taste of the cooked food. Furthermore, placing the temperature sensor near the side wall of the inner pot is problematic because the area near the side wall is a curved transition zone, preventing the sensing surface of the sensor from fully adhering to the bottom wall of the inner pot. This results in slow and uneven heat transfer, hindering rapid and accurate temperature detection. Utility Model Content

[0005] This invention provides an automatic drainage cooking appliance to solve the problem that existing cooking appliances with drainage structures cannot accurately measure temperature at the bottom.

[0006] The technical solution adopted in this utility model is as follows:

[0007] An automatic drainage cooking appliance includes a pot body and a pot lid. The bottom of the pot body is provided with a heating device, and the pot body is provided with an inner pot. A drain valve assembly is provided in the middle area of ​​the bottom wall of the inner pot. The heating device is provided with a receiving channel corresponding to the drain valve assembly. Multiple temperature sensing elements are provided on the outer periphery of the receiving channel. The multiple temperature sensing elements abut against the bottom wall of the inner pot on the outer periphery of the drain valve assembly. The heating area of ​​the heating device extends outward from the outer edge of the multiple temperature sensing elements.

[0008] In this design, a drain valve assembly is provided in the middle area of ​​the bottom wall of the inner pot, so as to drain the water in the inner pot through the drain valve assembly, thereby enabling the cooking of low-sugar rice or low-purine food, or the automatic cleaning and cooking of food.

[0009] By setting multiple temperature sensing elements against the bottom wall of the inner liner around the drain valve assembly, the heating zone of the heating device extends outward from the outer edge of the multiple temperature sensing elements. That is, the temperature sensing elements are located in the area between the heating zone of the heating device and the drain valve assembly. This places the temperature sensing elements at the bottom of the inner liner while avoiding the heating zone of the heating device. This solves the problems of limited space for temperature sensing elements in the heating zone, complex installation and fixing, and high-temperature aging of the temperature sensing elements. It also prevents the temperature sensing position from being located in the heating zone of the heating device, i.e., the local overheating point of the heating device, and the strong heat radiation and thermal conduction interference from the heating zone, which would cause the measured temperature value to be different from the actual temperature of the inner liner, resulting in large temperature correction, inaccurate temperature measurement, and misjudgment.

[0010] Meanwhile, regardless of whether the inner liner is straight or spherical, due to the manufacturing process of the inner liner and to ensure better contact with the temperature sensor, the middle part of the bottom wall of the inner liner is a flat structure, thus presenting a certain curvature to achieve a smooth transition with the side wall of the inner liner. The temperature sensor is pressed against the middle area of ​​the bottom wall of the inner liner. This not only achieves the versatility of the inner liner manufacturing process and shape, but also ensures that the temperature sensor is pressed against the middle part of the bottom wall of the inner liner, that is, the flat position of the bottom wall of the inner liner. This ensures that the temperature sensor is completely in contact with the bottom wall of the inner liner, ensuring rapid heat conduction and achieving fast and accurate temperature measurement. It also prevents the problem of inaccurate temperature measurement caused by the temperature sensor not being in contact with the bottom wall of the inner liner or not being in complete contact.

[0011] Furthermore, the receiving channel not only allows water discharged from the inner pot through the drain valve assembly to flow out, preventing splashing during drainage, but also isolates electrical components such as temperature sensors, ensuring their safety and waterproofing. In this design, multiple temperature sensors enable multi-point temperature measurement on the bottom wall of the inner pot around the drain valve assembly, further ensuring accurate temperature measurement. These technical solutions not only ensure the rational placement of the bottom temperature sensors in cooking appliances with drain valve assemblies, resulting in a simple and reliable structure, but also improve the accuracy of temperature measurement.

[0012] Furthermore, the heating zone of the heating device extends outward from the outer edge of multiple temperature sensing elements, thereby bringing the heating zone closer to the side wall of the inner pot. This allows the heat obtained by the inner pot to be quickly transferred to the side wall, increasing the heat transfer speed from the bottom to the side wall, improving the uniformity of heat conduction between the bottom and the side wall, and also preventing excessive heat accumulation at the bottom of the inner pot, which could cause problems such as scorching.

[0013] The plurality of temperature sensing elements include at least one temperature sensor and / or one temperature controller.

[0014] In this solution, the temperature sensor is mainly used to detect the temperature of the inner liner in real time and provide feedback to the control device and the heating device; the thermostat is used to provide feedback that the bottom temperature has reached the preset value when the temperature exceeds the preset value. The multiple temperature sensing elements located at the bottom include at least one of the temperature sensor or the thermostat, or both; or multiple temperature sensors to achieve accurate temperature measurement and sensing at multiple points.

[0015] At least one of the multiple temperature sensing elements is in the shape of a flat strip, a flat C-shape, or a flat racetrack shape to fit the shape of the receiving channel.

[0016] In this design, the flat-shaped temperature sensor ensures that it can be installed flush against the wall of the receiving channel, saving installation space at the bottom of the pot and allowing for precise temperature control while freeing up space in the heating zone. Simultaneously, the flat structure provides a larger surface area for the sensor to fully conform to the bottom wall of the inner pot. This larger contact area significantly improves the heat transfer rate, further ensuring rapid and accurate temperature measurement. Flat, elongated, C-shaped, or racetrack-shaped sensors better adapt to the shape of the receiving channel. The corresponding arrangement of the receiving channel and drain valve assembly ensures that multiple temperature sensors are flush against the bottom wall of the inner pot, surrounding the drain valve assembly and further guaranteeing the accuracy of temperature measurement.

[0017] By using a flat temperature sensing element and sensing at multiple points, not only can the failure of a single temperature measuring position and inaccurate temperature measurement be prevented, but also the multiple temperature measuring positions can complement and correct each other, improving the accuracy of bottom temperature measurement. At the same time, it can also solve the problem that the existing temperature sensing elements are large and cannot achieve temperature measurement in a flat, small-volume temperature sensing structure.

[0018] Multiple through holes are provided around the accommodating channel, and the multiple temperature sensing elements are separately arranged and elastically telescopically disposed within the multiple through holes.

[0019] In this design, multiple temperature sensors are separately installed within multiple through-holes surrounding the receiving channel. This allows for accurate temperature measurement at multiple points. Simultaneously, the multiple elastic temperature sensors supporting the bottom of the inner liner are positioned around the drain valve assembly at the bottom of the inner liner, correcting the centered placement of the inner liner. This ensures that the drain channel of the drain valve assembly is directly aligned with the receiving channel, preventing the inner liner from tilting and ensuring proper contact between the temperature sensors and the bottom wall of the inner liner, thus affecting temperature measurement accuracy. It also prevents drainage deviation, which could lead to inaccurate drainage, inaccurate prediction of drainage volume, or drainage safety hazards.

[0020] The plurality of temperature sensing elements are integrally arranged to at least partially surround the outer periphery of the receiving channel.

[0021] In this solution, multiple temperature sensing elements are integrated into one unit to achieve multi-point temperature measurement. A fixing element is used to limit the movement around the outer periphery of the receiving channel, thereby simplifying assembly and improving stability.

[0022] The heating device is an electromagnetic coil, which includes a coil frame and a coil; the coil frame is provided with a docking hole for connecting to a drain valve assembly, and a first enclosure integrally formed with the coil frame is provided on the outer periphery below the docking hole; the docking hole and the first enclosure form the receiving channel.

[0023] This solution achieves heating through an electromagnetic coil located below the inner liner. The coil frame has a docking hole for connecting to the drain valve assembly and an integrally formed first enclosure. The docking hole and the first enclosure form a receiving channel, which on the one hand enables rapid injection molding, which is low-cost and reliable, and on the other hand, the first enclosure isolates components such as coils and temperature sensors, ensuring electrical safety. At the same time, the structure of the first enclosure further enhances the strength of the coil frame and the structural strength near the docking hole.

[0024] The outer perimeter of the first enclosure is also provided with a second enclosure integrally formed with the wire reel frame; an installation area is formed between the first enclosure and the second enclosure; the temperature sensing element is disposed in the installation area and can float up and down.

[0025] In this design, the area where the coil of the coil frame is located—that is, the heating zone, the installation area of ​​the temperature sensing element fixed to the coil frame, and the accommodating channel of the coil frame—is separated by a second enclosure and a first enclosure. On the one hand, the accommodating channel and the installation area are effectively isolated by the first enclosure, preventing water from the accommodating channel from splashing into the installation area and the heating zone, causing water contact with electrical components such as the temperature sensing element or coil, resulting in safety hazards such as short circuits and arcing. On the other hand, the area between the first and second enclosures is set up as the installation area for the temperature sensing element, so that the temperature sensing element is located in an independent installation space. This not only effectively waterproofs the temperature sensing element but also ensures that the temperature measured by the temperature sensing element is the actual temperature of the inner wall, avoiding the influence of high-temperature radiation and heat conduction from the coil heating zone, as well as the influence of air or water in the accommodating channel, which could cause temperature deviations and inaccurate temperature measurements.

[0026] In addition, the accommodating channel and the installation area are both located in the middle area of ​​the bottom wall of the inner liner. The coil frame extends outward along the installation area to wind the coil, so that the coil of the coil frame is evenly distributed and will not be separated by other components, thereby improving heating efficiency. Also, the coil is closer to the side wall of the inner liner, so that the heat obtained by the inner liner can be quickly transferred to the side wall, increasing the heat transfer speed from the bottom to the side wall and improving the uniformity of heat conduction between the bottom and the side wall.

[0027] Furthermore, the wire reel frame is integrally molded into the first and second enclosures, enabling rapid injection molding, low cost, and high reliability. At the same time, the structure of the first and second enclosures further enhances the strength of the wire reel frame and the structural strength near the docking holes.

[0028] The first fence extends downward by a length of h1; the second fence extends downward by a length of h2; h1 ≥ h2.

[0029] In this design, the downward extension length of the first enclosure is greater than that of the second enclosure, meaning the downward extension length of the accommodating channel is greater than that of the outer wall of the installation area. This serves two purposes: firstly, it guides and blocks water during drainage, preventing water splashing and water from entering the area where the temperature sensing element and coil are located, thus avoiding inaccurate temperature measurement or safety hazards to components; secondly, the lower downward extension height of the second enclosure not only improves the ease of assembly of the temperature sensing element but also allows it to float up and down so that the bottom wall of the inner liner can fully fit, preventing the second enclosure from being too long, which could cause excessive travel of the temperature sensing element, resulting in unstable guidance or interference with the second enclosure.

[0030] The installation area is also provided with a mounting hole for limiting the temperature sensing element, and the mounting hole extends downward to form a guide channel; an isolation cavity is provided between the guide channel and the second enclosure; the temperature sensing element is disposed in the guide channel, which can float up and down, and passes through the mounting hole to abut against the bottom wall of the inner liner.

[0031] In this design, the guide channel provides the temperature sensing element with a vertically floating installation limit space. On the one hand, this prevents the temperature sensing element from tilting, which would prevent it from fully fitting the bottom wall of the inner liner and affecting the accuracy of temperature measurement. On the other hand, the guide channel provides the temperature sensing element with an independent limit space, achieving waterproofing while preventing the coil from heating it and conducting heat, thus achieving safety protection and accurate temperature measurement.

[0032] In addition, the presence of the isolation cavity creates an air cavity between the temperature sensing element and the coil, which can effectively avoid the influence of the magnetic field on the temperature sensing element and prevent the coil from heating the temperature sensing element at the same time, thus affecting the temperature measurement accuracy of the temperature sensing element.

[0033] Furthermore, the mounting hole is located on the inner surface of the coil frame and is provided with a blocking rib.

[0034] In this design, the blocking ribs prevent water from entering the pot body and flowing out through the connection hole, thus achieving effective waterproofing of the temperature sensing element.

[0035] The drain valve assembly includes a metal channel and a seal for sealing or opening the metal channel; the metal channel is formed by a downward protrusion in the middle region of the bottom wall of the inner liner, and the receiving channel at least partially covers the metal channel.

[0036] In this design, a metal channel protrudes downwards in the middle of the bottom wall of the inner liner to form the drain valve assembly. This allows the metal channel to be integrally formed or welded to the bottom wall of the inner liner. This not only solves the problems of fixing and sealing the inner liner and the metal channel, but also prevents dirt from easily remaining in various parts of the drain valve assembly after one or multiple uses, thus avoiding cleaning difficulties or causing odors or hygiene problems. The sealing element is used to block or open the metal channel to open or close the drainage of the inner liner. The receiving channel is at least partially fitted with the metal channel, so that the perimeter of the entire drainage pipe is a closed pipe during drainage, preventing overflow or splashing to other locations.

[0037] In addition, the metal channel forming the drain valve assembly is convex downwards on the bottom wall of the inner pot. On the one hand, this achieves a smooth and integrated internal area of ​​the inner pot, making it easier to scoop rice and clean the inner pot, thus improving the user experience. On the other hand, the downward-convex metal channel, compared to the upward-convex metal channel of the inner pot, can ensure that the water in the inner pot is fully drained when draining. This not only achieves good low-sugar, low-purine or cleaning effects, but also makes it easy to control the amount of water in the inner pot, preventing excessive water in the inner pot, especially when cooking small amounts of food, from affecting the taste of the cooked food. Attached Figure Description

[0038] The accompanying drawings, which are provided to further illustrate the present invention and constitute a part of the present invention, illustrate exemplary embodiments of the present invention and are used to explain the present invention, but do not constitute an undue limitation of the present invention.

[0039] In the attached image:

[0040] Figure 1 This is a cross-sectional structural schematic diagram of an automatic drainage cooking appliance according to one embodiment of the present invention.

[0041] Figure 2 This is a cross-sectional view of the pot body without an inner liner according to one embodiment of the present invention.

[0042] Figure 3 This is a cross-sectional structural diagram of the pot body with the inner liner placed according to one embodiment of the present invention.

[0043] Figure 4 for Figure 3 An enlarged structural diagram of region A;

[0044] Figure 5 This is a schematic diagram of the temperature sensing element according to one embodiment of the present invention;

[0045] Figure 6 This is a schematic diagram of the lower part of the pot body according to one embodiment of the present invention;

[0046] Figure 7 This is a schematic diagram of the structure of an electromagnetic coil according to one embodiment of the present invention.

[0047] in:

[0048] 100 Pot body; 200 Pot lid; 300 Heating device; 310 Heating zone; 311 Through hole;

[0049] 110 Inner liner; 111 Drain valve assembly; 112 Metal channel; 113 Seal;

[0050] 120 Electromagnetic coil; 121 Coil holder; 1211 Docking hole; 1212 First enclosure; 1213 Reception channel;

[0051] 1214 Second enclosure; 1215 Installation area; 1216 Mounting hole; 1217 Guide channel; 1218 Isolation cavity; 1219 Barrier rib; 122 Coil; 1221 Winding area; 123 Flow guide groove;

[0052] h1 is the length of the first fence extending downwards; h2 is the length of the second fence extending downwards;

[0053] 130 Temperature sensing element; 131 Housing; 132 Fixing position; 133 Spring; 134 Wire; 135 First temperature sensing element; 136 Second temperature sensing element;

[0054] 140 Water collection tank; 141 Receiving channel. Detailed Implementation

[0055] To more clearly illustrate the overall concept of this utility model, a detailed description will be provided below with reference to the accompanying drawings.

[0056] Many specific details are set forth in the following description in order to provide a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the scope of protection of the present invention is not limited to the specific embodiments disclosed below.

[0057] Furthermore, it should be understood in the description of this utility model 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. They are only for the convenience of describing this utility model 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. Therefore, they should not be construed as limitations on this utility model.

[0058] In this utility model, unless otherwise explicitly 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 utility model according to the specific circumstances.

[0059] In this invention, unless otherwise expressly specified and limited, the first feature "on" or "below" the second feature may be in direct contact with the first and second features, or indirect contact through an intermediate medium. In the description of this specification, references to terms such as "implementation," "example," "aspect," or "specific example" 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 invention. 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 may be combined in any suitable manner in one or more embodiments or examples.

[0060] like Figure 1 , Figure 2 As shown, an automatic drainage cooking appliance includes a pot body 100 and a pot lid 200. A heating device 300 is provided at the bottom of the pot body 100. An inner pot 110 is provided inside the pot body 100. A drain valve assembly 111 is provided in the middle area of ​​the bottom wall of the inner pot 100. The heating device 300 is provided with a receiving channel 1213 corresponding to the drain valve assembly 111. Multiple temperature sensing elements 130 are provided on the outer periphery of the receiving channel 1213. The multiple temperature sensing elements 130 abut against the bottom wall of the inner pot 110 on the outer periphery of the drain valve assembly 111. The heating area 310 of the heating device 300 extends outward from the outer edge of the multiple temperature sensing elements 130.

[0061] In this embodiment, a drain valve assembly 111 is provided in the middle area of ​​the bottom wall of the inner pot 110, so that water in the inner pot can be discharged through the drain valve assembly 111 to realize the cooking of low-sugar rice or low-purine food, or to realize the automatic cleaning and cooking of food.

[0062] By setting multiple temperature sensing elements 130 against the bottom wall of the inner liner 110 around the drain valve assembly 111, the heating area of ​​the heating device extends outward from the outer edge of the multiple temperature sensing elements 130; that is, the temperature sensing elements 130 are located in the area between the heating area 310 of the heating device 300 and the drain valve assembly 111. Thus, while setting the temperature sensing elements 130 at the bottom of the inner liner 110, the heating area 310 of the heating device 300 is avoided. This firstly solves the problems of limited space for setting the temperature sensing elements in the heating area 310, complex installation and fixing, and high-temperature aging of the temperature sensing elements 130. It also prevents the temperature sensing position from being located in the heating area 310 of the heating device 300, i.e., the local overheating point of the heating device 300, and the problem of the measured temperature value not being the actual temperature value of the inner liner due to the strong heat radiation and thermal conduction interference brought by the heating area 310, which would cause large temperature correction, inaccurate temperature measurement, and misjudgment.

[0063] Meanwhile, regardless of whether the inner liner is straight or spherical, due to the manufacturing process of the inner liner and to ensure better contact and temperature measurement with the temperature sensing element 130, the central area of ​​the bottom wall of the inner liner 110 is a planar structure, thus presenting a certain curvature to achieve a smooth transition with the side wall of the inner liner. The temperature sensing element 130 is placed against the central area of ​​the bottom wall of the inner liner 110. This not only achieves the versatility of the inner liner shape, but also ensures that the position of the temperature sensing element 130 against the central position of the bottom wall of the inner liner 110, that is, the planar position of the bottom wall of the inner liner, can ensure that the temperature sensing element 130 is completely in contact with the bottom wall of the inner liner 110, ensuring rapid heat conduction and achieving rapid and accurate temperature measurement. This prevents the problem of inaccurate temperature measurement caused by the temperature sensing element 130 not being in contact with or not being completely in contact with the bottom wall of the inner liner 110.

[0064] Furthermore, the receiving channel 1213 not only allows water discharged from the inner pot through the drain valve assembly 111 to flow out through the receiving channel 1213, preventing water splashing during drainage, but also isolates electrical components such as the temperature sensing element 130, ensuring the safety and waterproofing of these components. In this solution, by setting multiple temperature sensing elements 130, multi-point temperature sensing and measurement can be achieved on the bottom wall of the inner pot around the drain valve assembly 111, further ensuring the accuracy of temperature measurement. Through the above technical solutions, not only is the placement of the temperature sensing elements at the bottom of the cooking appliance with the drain valve assembly reasonable and the structure simple and reliable, but the accuracy of temperature sensing and measurement is also improved. In this embodiment, preferably, two temperature sensing elements 130 are set, evenly distributed around the outer periphery of the receiving channel 1213.

[0065] Furthermore, the heating zone 310 of the heating device 300 extends outward from the outer edge of the multiple temperature sensing elements 130, thereby making the heating zone 310 of the heating device 300 closer to the side wall of the inner pot 110. This allows the heat obtained by the inner pot 110 to be quickly transferred to the side wall, increasing the heat transfer speed from the bottom to the side wall, improving the uniformity of heat conduction between the bottom and the side wall, and also preventing excessive heat accumulation at the bottom of the inner pot, which could cause problems such as burning.

[0066] In this embodiment, the heating device can be a heating plate or an electromagnetic coil; the heating area of ​​the heating plate is the area where the heating tube is located, and the heating area of ​​the electromagnetic coil is the area where the coil wound on the coil frame is located.

[0067] In one embodiment, the temperature sensing element 130 includes at least one temperature sensor and / or one thermostat. The temperature sensor is mainly used to detect the temperature of the inner liner in real time and provide feedback to the control device and the heating device; the thermostat is used to provide feedback that the bottom temperature has reached the preset value when the temperature exceeds the preset value. Multiple temperature sensing elements located at the bottom include at least one of a temperature sensor or a thermostat, or both; or multiple temperature sensors to achieve accurate multi-point temperature measurement and sensing. Figure 7 As shown, this embodiment includes two temperature sensing elements 130, namely a first temperature sensing element 135 and a second temperature sensing element 136. The first temperature sensing element 135 contains a temperature sensor, and the second temperature sensing element 136 contains a temperature controller, which are attached to the outer periphery of the accommodating channel 1213.

[0068] In one embodiment, such as Figure 5 , Figure 6 , Figure 7As shown, the temperature sensing element 130 is attached to the outer periphery of the docking hole 1211 and is in the shape of a flat elongated strip, a flat C-shape, or a flat racetrack shape to adapt to the shape of the receiving channel 1213. The figure shows the temperature sensing element 130 in the shape of a flat racetrack; other shapes are not shown. The flat structure of the temperature sensing element not only ensures that it can be installed against the wall on the outer periphery of the docking hole 1211 or the receiving channel 1213, that is, ensures that the temperature sensing element 130 can be closely attached to the outer periphery of the receiving channel 1213, thereby saving installation space at the bottom of the pot body and increasing the area of ​​the winding area 1221 of the coil holder 121. At the same time, the flat structure allows the temperature sensing element 130 to have a larger surface area to fully fit against the bottom wall of the inner liner 110. The larger contact area also significantly improves the heat transfer rate, further ensuring the rapid and accurate temperature measurement. A flat, elongated shape, a flat C-shape, or a flat racetrack shape can better fit the shape of the accommodating channel 1213, reducing installation space while increasing the contact area with the bottom wall of the inner liner 110.

[0069] In one embodiment, such as Figures 2-4 , Figure 6 , Figure 7 As shown, the temperature sensing element 130 includes at least two elements, symmetrically distributed on the outer periphery of the receiving channel 1213. Multi-point temperature sensing not only prevents the failure of a single temperature measurement position and inaccurate temperature measurement, but also allows multiple temperature measurement positions to complement and correct each other, improving the accuracy of bottom temperature measurement. It also solves the problem in existing technologies where the temperature sensing element is large and cannot achieve a flat, small-volume temperature sensing structure. For example, multiple temperature sensing elements can be configured with different temperature sensing components, such as temperature sensors and temperature controllers, in different temperature sensing elements to save the surface area of ​​a single temperature sensing element. Furthermore, by symmetrically distributing them on the outer periphery of the receiving channel 1213, the required circumferential area of ​​the temperature sensing element 130 is ensured to be smaller, thus allowing for a larger heating area 310 of the heating device 300. Therefore, precise temperature control is achieved while increasing the heating area. Specifically, this embodiment allows for the separate placement of the temperature sensor and the temperature controller, each serving as a temperature sensing point. That is, only one temperature sensing element is housed within the temperature sensing component 130, reducing its surface area by at least half compared to the prior art where the temperature sensor and temperature controller are integrated into a single temperature sensing component 130. In this embodiment, the temperature sensing component 130 comprises two elements: a first temperature sensing component 135 and a second temperature sensing component 136, which are arranged in a flat, racetrack-like shape around the outer periphery of the mating hole 1211.

[0070] In addition, multiple vertically floating temperature sensing elements 130 are arranged around the outer periphery of the drain valve assembly 111 on the bottom wall of the inner liner 110. This can correct the placement of the inner liner 110 in a centered position, thereby ensuring that the drain valve assembly 111 of the inner liner is placed directly opposite the receiving channel 1213. This prevents the inner liner 110 from being tilted, which would cause the temperature sensing elements 130 to not fully fit against the bottom wall of the inner liner 110, affecting the accuracy of temperature measurement. It also prevents drainage from being tilted, which could lead to inaccurate drainage, inaccurate prediction of drainage volume, or drainage safety hazards.

[0071] In one embodiment, such as Figure 2 As shown, multiple through holes 311 are provided around the receiving channel 1213, and multiple temperature sensing elements 130 are separately arranged and elastically extended within the multiple through holes 311. In this embodiment, there are two temperature sensing elements 130, distributed on the outer periphery of the receiving channel 1213. By separately arranging multiple temperature sensing elements 130 within the multiple through holes 311 surrounding the receiving channel 1213, on the one hand, it enables accurate multi-point temperature measurement, and on the other hand, the multiple elastically supporting temperature sensing elements 130 at the bottom of the inner liner are arranged around the outer periphery of the drain valve assembly 111 at the bottom of the inner liner, which can correct the placement of the inner liner in a centered position. This ensures that the drain channel of the drain valve assembly 111 of the inner liner is placed directly opposite the receiving channel 1213, preventing the inner liner 110 from being tilted, which would cause the temperature sensing elements 130 to not fully fit the bottom wall of the inner liner 110, affecting the accuracy of temperature measurement, and preventing drainage deviation, inaccurate drainage or inaccurate prediction of drainage volume, or drainage safety hazards.

[0072] In one embodiment, multiple temperature sensing elements 130 can be integrally arranged, at least partially surrounding the outer periphery of the receiving channel, to achieve multi-point temperature measurement. At the same time, they are limited by a fixing element around the outer periphery of the receiving channel 1213 to simplify assembly and improve stability. For example, it can be a C-shaped or racetrack-shaped shell, which contains multiple temperature sensing elements arranged side by side or staggered. While achieving multi-point and multi-faceted temperature measurement, its fixed assembly only requires the assembly of a single shell.

[0073] In one embodiment, such as Figure 3 , Figure 4 , Figure 7As shown, the heating device 300 is an electromagnetic coil 120, which includes a coil frame 121 and a coil 122. The coil frame 121 is provided with a docking hole 1211 for docking with the drain valve assembly 111. A first enclosure 1212 integrally formed with the coil frame 121 is provided on the outer periphery below the docking hole 1211. The docking hole 1211 and the first enclosure 1212 form a receiving channel 1213. Heating is achieved through an electromagnetic coil 120 located below the inner liner 110. The coil frame 121 is provided with a docking hole 1211 for docking with the drain valve assembly 111 and an integrally formed first enclosure 1212. The docking hole 1211 and the first enclosure 1212 form a receiving channel 1213, which enables rapid injection molding, low cost and reliability. On the other hand, the first enclosure 1212 isolates components such as the coil 122 and the temperature sensing element 130, ensuring electrical safety. At the same time, the structure of the first enclosure 1212 further enhances the strength of the coil frame 121 and the structural strength near the docking hole 1211.

[0074] In one embodiment, such as Figures 3-7 As shown, a second enclosure 1214 integrally formed with the coil frame 121 is also provided on the outer periphery of the first enclosure 1212; an installation area 1215 is formed between the first enclosure 1212 and the second enclosure 1214; the temperature sensing element 130 is disposed in the installation area 1215, which can float up and down. In this scheme, the heating area of ​​the coil frame 121, i.e., the winding area 1221 where the coil 122 is wound, is separated from the installation area 1215 of the coil frame 121 where the temperature sensing element 130 is fixed, and the receiving channel 1213 of the coil frame 121 by the enclosure. On the one hand, the receiving channel 1213 and the installation area 1215 are effectively isolated by the first enclosure 1212, preventing water in the receiving channel 1213 from splashing into the installation area 1215 and the winding area 1221, causing the temperature sensing element 130 or the coil 122 and other electrical components to come into contact with water, resulting in short circuits, sparks, etc. Safety hazards; on the other hand, the installation area of ​​the temperature sensing element 130 is set in the area between the first enclosure 1212 and the second enclosure 1214, so that the temperature sensing element 130 is located in an independent installation space. This not only achieves effective waterproofing of the temperature sensing element 130, but also ensures that the temperature measured by the temperature sensing element 130 is the actual temperature of the inner wall. It avoids the influence of the heating of the coil 122 in the winding area 1221 and its high-temperature radiation and heat conduction, as well as the influence of the air layer or water in the accommodating channel 1213, which would cause temperature deviation and inaccurate temperature measurement.

[0075] Furthermore, the accommodating channel 1213 and the mounting area 1215 are both located in the middle region of the drain valve assembly 111 on the bottom wall of the inner liner 110. The coil frame 121 extends outward along the mounting area 1215 and has a winding area 1221 for winding the coil 122. This makes the coil 122 in the winding area 1221 of the coil frame 121 evenly distributed and not separated by other components, thus improving heating efficiency. Also, the coil 122 is closer to the side wall of the inner liner 110, so that the heat obtained by the inner liner can be quickly transferred to the side wall, increasing the heat transfer speed from the bottom wall to the side wall of the inner liner 110 and improving the uniformity of heat conduction between the bottom and side wall of the inner liner 110.

[0076] Furthermore, the wire reel frame 121 is integrally molded into the first enclosure 1212 and the second enclosure 1214, enabling rapid injection molding, low cost and reliability. At the same time, the structure of the first enclosure 1212 and the second enclosure 1214 further enhances the strength of the wire reel frame 121 and the structural strength near the docking hole 1211.

[0077] In one embodiment, such as Figure 2 , Figure 5 As shown, the temperature sensing element 130 includes a housing 131 that houses a temperature sensing component, which can be a temperature sensing element or a temperature control element; a wire 134 of the temperature sensing component extends out of the housing 131 to connect to the power board; and a spring 133 supported at the lower part of the housing 131, allowing the temperature sensing element 130 to float up and down; the temperature sensing element 130 also includes a fixing position 132 provided in the housing 133 to limit the housing 131 to the outer periphery of the receiving channel 1213. The temperature sensing element 130 is limited between the first enclosure 1212 and the second enclosure 1214 of the wire tray frame 121 and is disposed within the mounting area 1215, allowing it to float up and down.

[0078] In one embodiment, such as Figure 3 , Figure 4As shown, the downward extension length h1 of the first enclosure is greater than the downward extension length h2 of the second enclosure. That is, the downward extension length h1 of the receiving channel 1213 is greater than the downward extension length h2 of the installation area 1215. On the one hand, this serves to guide and block water during drainage, preventing water splashing and preventing water from entering the temperature sensing element 130 and the winding area 1221 of the coil frame 121 in the installation area 1215, which could cause inaccurate temperature measurement or safety hazards to components. On the other hand, the downward extension height of the second enclosure 1214 is smaller, which not only improves the ease of assembly of the temperature sensing element 130, but also facilitates the vertical movement of the temperature sensing element 130 so that the bottom wall of the inner liner can be fully fitted. This prevents the second enclosure 1214 from being too long, which could cause the temperature sensing element to have an excessively long stroke, resulting in unstable guidance or interference with the second enclosure 1214. In addition, the lower height of the second enclosure 1214 extends downwards, which facilitates heat dissipation near the temperature sensing element 130 and prevents heat accumulation and conduction to the temperature sensing element 130, thus affecting the accuracy of temperature measurement.

[0079] In one embodiment, such as Figures 2-4 As shown, the installation area 1215 is provided with a mounting hole 1216 for the limiting temperature sensing element 130. The mounting hole 1216 extends downward to form a guide channel 1217. The temperature sensing element 130 is provided in the guide channel 1217 and can float up and down, passing through the mounting hole 1216 and abutting against the bottom wall of the inner liner 110.

[0080] By setting the guide channel 1217, the temperature sensing element 130 is given a vertically floating installation limit space. On the one hand, this prevents the temperature sensing element 130 from tilting, which would prevent it from fully fitting the bottom wall of the inner liner 110 and affecting the accuracy of temperature measurement. On the other hand, the guide channel 1217 provides the temperature sensing element 130 with an independent limit space, which not only makes it waterproof but also prevents the coil 122 from heating it and conducting heat, thus achieving safety protection and accurate temperature measurement.

[0081] It should be noted that the guide channel 1217 can be integrally injection molded with the coil frame 121. In addition, the guide channel 1217 is formed by extending downward from the mounting hole 1216. However, as a preferred embodiment, the outer wall surface of the first enclosure 1212 can also form part of the side wall surface of the guide channel, thereby further simplifying the injection molding and saving space.

[0082] As a preferred embodiment, such as Figure 2 , Figure 3 , Figure 4 , Figure 6As shown, an isolation cavity 1218 is also provided between the guide channel 1217 and the second enclosure 1214. Due to the presence of the isolation cavity 1218, an air cavity exists between the temperature sensing element 130 and the coil 122 of the winding area 1221, effectively preventing the influence of the magnetic field on the temperature sensing element and preventing the coil 122 from heating the temperature sensing element 130, thus affecting the temperature measurement accuracy of the temperature sensing element 130. Furthermore, the isolation cavity 1218 also helps dissipate heat near the temperature sensing element 130, preventing heat accumulation.

[0083] As a preferred embodiment, such as Figure 2 , Figure 4 , Figure 7 As shown, the middle area of ​​the online tray 121 is provided with a docking hole 1211. The docking hole 1211 can quickly drain water that overflows onto the inner surface of the pot or water that enters the inner surface of the pot during cleaning, preventing accumulation. At the same time, the docking hole 1211 also allows foreign objects that enter the inner surface of the pot 100 to be quickly discharged, preventing blockage of the docking hole 1211.

[0084] In a preferred embodiment, the mounting hole 1216 is provided with a blocking rib 1219 on the inner surface of the coil frame 121. The blocking rib 1219 prevents water from entering the pot body 100 and thus prevents it from entering the mounting hole 1216. The water flows out through the docking hole 1211, thereby achieving effective waterproofing of the temperature sensing element 130.

[0085] Of course, the blocking rib 1219 referred to here can be formed by protruding relative to the coil frame 121, so that the height of the blocking rib is higher than the height of the docking hole, so that the water flows to the docking hole 1211 first and is discharged; such as Figure 7 As shown, a flow guide groove 123 can also be provided in the area connected to the docking hole 1211. Water entering the pot flows to the flow guide groove 123 and then flows out through the docking hole 1211. As a more preferred embodiment, the blocking rib 1219 and the flow guide groove 123 can also be provided simultaneously to further ensure that water does not flow into the mounting hole 1216.

[0086] In one embodiment, such as Figure 1As shown, the drain valve assembly 111 includes a metal channel 112 and a seal 113 for sealing or opening the metal channel 112; the middle region of the bottom wall of the inner liner 110 is provided to form the metal channel 112, and the receiving channel 1213 is at least partially fitted with the metal channel 112. A metal channel 112 protrudes downwards from the middle region of the bottom wall of the inner liner 110 to form the drain valve assembly 111. This allows the metal channel 112 to be integrally formed or welded to the bottom wall of the inner liner 110. This not only solves the problems of fixing and sealing the inner liner 110 and the metal channel 112, but also prevents dirt residue from easily accumulating in various parts of the drain valve assembly 111 after one or more uses, thus avoiding cleaning difficulties, odors, or hygiene problems. The sealing element 113 is used to block or open the metal channel 112 to open or close the drain from the inner liner. The receiving channel 1213 at least partially covers the metal channel 112, ensuring that the entire drainage pipe is a closed pipe during drainage, preventing overflow or splashing to other locations. In this embodiment, the sealing element 113 is an iron ball, which moves up and down by a drive to open or close the metal channel 112 of the drain valve assembly.

[0087] In addition, the metal channel 112 of the drain valve assembly 111 is formed by the downward protrusion of the bottom wall of the inner pot. On the one hand, it realizes the smoothness and integrity of the inner pot's internal area, making it easier to scoop rice and clean the inner pot, thus improving the user experience. On the other hand, the downward protruding metal channel 112, relative to the upward protruding metal channel of the inner pot, can fully drain the water in the inner pot when draining. This not only achieves good low-sugar, low-purine or cleaning effects, but also makes it easy to control the amount of water in the inner pot, preventing excessive water in the inner pot during cooking, especially when cooking small amounts of food, which would affect the taste of the cooked food.

[0088] In one embodiment, such as Figure 1 As shown, this application discloses an automatic drainage cooking appliance, which also includes a water collection tank 140. The water collection tank 140 includes a receiving channel 141, and a receiving channel 1213 communicates with the receiving channel 141. By setting up the water collection tank 140, water discharged from the inner pot 110 or water from the pot body 100 is drained into the water collection tank 140, facilitating reuse or quick cleaning. The receiving channel 141 and the receiving channel 1213 of the water collection tank 140 communicate to prevent splashing or leakage during the drainage process.

[0089] For any parts not mentioned in this utility model, existing technologies can be used or referenced.

[0090] 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.

[0091] The above description is merely an embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principle of this utility model should be included within the scope of the claims of this utility model.

Claims

1. A cooking appliance with automatic drainage, comprising a pot body and a pot lid, wherein a heating device is provided at the bottom of the pot body, an inner pot is provided inside the pot body, and a drain valve assembly is provided in the middle region of the bottom wall of the inner pot; characterized in that, The heating device has a receiving channel corresponding to the drain valve assembly. Multiple temperature sensing elements are provided on the outer periphery of the receiving channel. The multiple temperature sensing elements abut against the bottom wall of the inner liner on the outer periphery of the drain valve assembly. The heating area of ​​the heating device extends outward from the outer edge of the multiple temperature sensing elements.

2. The cooking appliance with automatic drainage as described in claim 1, characterized in that, The plurality of temperature sensing elements include at least one temperature sensor and / or one temperature controller.

3. The cooking appliance with automatic drainage as described in claim 1, characterized in that, At least one of the multiple temperature sensing elements is in the shape of a flat strip, a flat C-shape, or a flat racetrack shape to fit the shape of the receiving channel.

4. The cooking appliance with automatic drainage as described in claim 1, characterized in that, Multiple through holes are provided around the receiving channel, and the multiple temperature sensing elements are separately arranged and elastically telescopically disposed within the multiple through holes; or, the multiple temperature sensing elements are integrally arranged to at least partially surround the outer periphery of the receiving channel.

5. A cooking appliance with automatic drainage as described in claim 1, characterized in that, The heating device is an electromagnetic coil, which includes a coil frame and a coil; the coil frame is provided with a docking hole for connecting to the drain valve assembly, and a first enclosure integrally formed with the coil frame is provided on the outer periphery below the docking hole; The docking hole and the first enclosure form the receiving channel.

6. A cooking appliance with automatic drainage as described in claim 5, characterized in that, The outer perimeter of the first enclosure is also provided with a second enclosure integrally formed with the wire reel frame; an installation area is formed between the first enclosure and the second enclosure; the temperature sensing element is disposed in the installation area and can float up and down.

7. A cooking appliance with automatic drainage as described in claim 6, characterized in that, The first fence extends downward by a length of h1; the second fence extends downward by a length of h2; h1 ≥ h2.

8. A cooking appliance with automatic drainage as described in claim 6, characterized in that, The installation area is also provided with a mounting hole for limiting the temperature sensing element, and the mounting hole extends downward to form a guide channel; an isolation cavity is provided between the guide channel and the second enclosure; the temperature sensing element is disposed in the guide channel, which can float up and down, and passes through the mounting hole to abut against the bottom wall of the inner liner.

9. A cooking appliance with automatic drainage as described in claim 8, characterized in that, The mounting hole is located on the inner surface of the coil frame and is provided with a blocking rib.

10. A cooking appliance with automatic drainage as described in claim 1, characterized in that, The drain valve assembly includes a metal channel and a seal for sealing or opening the metal channel; the metal channel is formed by a downward protrusion in the middle region of the bottom wall of the inner liner, and the receiving channel at least partially covers the metal channel.

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