Composite hot plate, outer pot assembly and electric cooker

Abstract

The utility model discloses a composite hot plate, an outer pot assembly and an electric cooker, and belongs to the field of household appliances, the composite hot plate comprises a heating pipe, a water pipe, a heat-conducting medium and a temperature measuring structure, the water pipe is provided with a water inlet and a steam outlet, and the water inlet and the steam outlet are respectively arranged at two ends of the water pipe; the heat-conducting medium is coated on the heating pipe and the water pipe; the distance between the temperature measuring structure and the steam outlet is smaller than or equal to 1 / 2 of the length of the water pipe in the flow guide direction of the water pipe. According to the utility model, the temperature measuring structure is arranged in the steam area at the middle and lower stream of the water pipe, so that the temperature of the composite hot plate can meet the cooking requirement, and the composite hot plate can quickly respond (power failure or power reduction) when the temperature is higher than the preset value of the temperature measuring structure, thereby avoiding the risk of plate melting.

Description

Technical Field

[0001] This utility model relates to the field of household appliance technology, and in particular to a composite heating plate, an outer pot assembly, and a rice cooker. Background Technology

[0002] A composite heating plate refers to a heating plate structure that includes both electric heating and steam heating. Steam is generated by heating water. In this way, part of the energy of the composite heating plate is output through electric heating and the other part is output through steam heating, which can improve the heating efficiency of the heating plate.

[0003] Composite heating plates have higher power than conventional electric heating plates. Therefore, in scenarios where no water is added, electric heating plates are at risk of melting. Utility Model Content

[0004] The main purpose of this utility model is to propose a composite heating plate, an outer pot assembly, and a rice cooker, aiming to solve the problem of the risk of the composite heating plate melting.

[0005] To achieve the above objectives, this utility model proposes a composite heating plate, including a heating element, a water pipe, a heat-conducting medium, and a temperature measuring structure. The water pipe has a water inlet and a steam outlet, which are located at opposite ends of the water pipe. The heat-conducting medium covers the heating element and the water pipe. Along the flow direction of the water pipe, the distance between the temperature measuring structure and the steam outlet is less than or equal to 1 / 2 of the length of the water pipe.

[0006] In one embodiment, the distance between the temperature measuring structure and the heating element is less than the distance between the temperature measuring structure and the water pipe.

[0007] In one embodiment, the distance between the temperature measuring structure and the outer wall of the heating tube is less than or equal to 5 times the diameter of the heating tube.

[0008] In one embodiment, the temperature measuring structure is disposed on the side of the heat-conducting medium facing away from the cooking cavity, and the temperature measuring surface of the temperature measuring structure faces the heating tube and / or water pipe. The projection of the heating tube and / or water pipe along the thickness direction of the composite heating plate falls on the temperature measuring surface of the temperature measuring structure.

[0009] In one embodiment, both the heating element and the water pipe are arranged circumferentially along the composite heat plate. The heating element is sleeved around the water pipe, or the water pipe is sleeved around the heating element. The portion of the heat-conducting medium covering the heating element and the water pipe is the outer ring portion. The thickness of the outer ring portion is greater than the thickness of the inner ring portion of the heat-conducting medium. The temperature measuring structure is set on the outer ring portion.

[0010] In one embodiment, the composite heat plate satisfies at least one of the following conditions:

[0011] The heat-conducting medium is integrally formed with the heating element and water pipe; the heat-conducting medium is aluminum; the heating element and water pipe are circular tubes.

[0012] Secondly, this utility model proposes an outer pot assembly, including an outer pot and any of the aforementioned composite heating plates. The outer pot has a receiving cavity for placing an inner pot. The composite heating plate is connected to the outer pot, and the heat-conducting medium of the composite heating plate can contact the bottom wall of the inner pot placed in the receiving cavity.

[0013] In one embodiment, the heat-conducting medium is located inside the containment cavity, and the temperature measuring structure is installed on the outer pot.

[0014] In one embodiment, a boss extends from the heat-conducting medium, and the temperature-sensing structure is attached to the boss.

[0015] In one embodiment, the heat-conducting medium is located inside the containment cavity, the temperature measuring structure is attached to the outer wall of the outer pot, and the position on the heat-conducting medium corresponding to the temperature measuring structure is attached to the inner wall of the outer pot.

[0016] In one embodiment, a boss extends from the heat-conducting medium, and the temperature-measuring structure and the boss are respectively attached to opposite sides of the outer pot wall; or, a heat-conducting bracket is provided on the heat-conducting medium, and the temperature-measuring structure and the heat-conducting bracket are respectively attached to opposite sides of the outer pot wall.

[0017] Thirdly, this utility model provides a rice cooker, including an inner pot and any of the above-mentioned outer pot components, wherein the inner pot is housed in the receiving cavity of the outer pot.

[0018] In one embodiment, the steam outlet of the water pipe is connected to the inner pot to deliver steam into the inner pot.

[0019] The composite heating plate of this invention includes a heating element, a water pipe, a heat-conducting medium, and a temperature measuring structure. The temperature measuring structure is set to monitor the temperature, and along the flow direction of the water pipe, the distance between the temperature measuring structure and the steam outlet is less than or equal to 1 / 2 of the length of the water pipe. That is, the temperature measuring structure is located in the steam area of ​​the middle and lower reaches of the water pipe. This ensures that the temperature of the composite heating plate meets the cooking requirements and can quickly react (power off or power reduced) when the temperature exceeds the preset value of the temperature measuring structure, thereby avoiding the risk of the plate melting. Attached Figure Description

[0020] To more clearly illustrate the embodiments of this utility model, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the composite heat plate in one embodiment of the present invention;

[0022] Figure 2 This is a schematic diagram of the heating element and water pipe in one embodiment of the present invention;

[0023] Figure 3 This is a schematic diagram of the composite heating plate being installed on a steam cooking device according to one embodiment of the present invention;

[0024] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0025] Figure 5 This is a schematic diagram showing the arrangement of the composite heating plate on a steam cooking device in another embodiment of the present invention;

[0026] Figure 6 for Figure 5 Enlarged view of point B in the middle;

[0027] Figure 7 This is a schematic diagram showing the arrangement of the composite heating plate on a steam cooking device in another embodiment of the present invention;

[0028] Figure 8 for Figure 7 A magnified view of point C in the middle.

[0029] Explanation of icon numbers

[0030] 100. Composite heating plate; 11. Heating element; 12. Water pipe; 121. Water inlet; 122. Steam outlet; 13. Temperature measuring structure; 14. Heat transfer medium; 141. Heat transfer surface; 142. Boss; 15. Heat transfer bracket; 200. Outer pot; 21. Through hole. Detailed Implementation

[0031] It should be noted that if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Furthermore, the use of "and / or" or "and / or" throughout the text includes three parallel solutions; for example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. In the embodiments of this utility model, "at least one" refers to one or more, and "more" refers to two or more.

[0032] In the description of the embodiments of this utility model, if technical terms such as "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," and "circumferential" appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the embodiments of this application and simplifying the description, and does 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, it should not be construed as a limitation on the embodiments of this application.

[0033] In the description of the embodiments of this utility model, unless otherwise explicitly specified and limited, the technical terms "installation," "connection," "joining," "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 or an electrical 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. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.

[0034] Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] Currently, rice cookers on the market use conventional electric heating plates with relatively low power, so there is no risk of melting even after prolonged heating. However, composite heating plates integrate the electric heating plate and water pipes, and generally have higher power than ordinary electric heating plates because some of the energy is used to heat the water in the pipes. Therefore, in scenarios where no water is added, all the power is used to heat the electric heating plate, leading to a risk of melting.

[0036] Based on this, the present invention proposes to set a temperature measuring structure to monitor the temperature, which can cut off the power or reduce the power when the temperature of the composite heating plate is higher than the set temperature, thereby avoiding the risk of the plate melting.

[0037] According to some embodiments of this utility model, reference Figure 1As shown, this utility model proposes a composite heating plate 100, including a heating element 11, a water pipe 12, a temperature measuring structure 13, and a heat-conducting medium 14. The water pipe 12 has a water inlet 121 and a steam outlet 122, which are respectively located at both ends of the water pipe 12; the heat-conducting medium 14 covers the heating element 11 and the water pipe 12; along the flow direction of the water pipe 12, the distance between the temperature measuring structure 13 and the steam outlet 122 is less than or equal to 1 / 2 of the length of the water pipe 12.

[0038] Heating element 11 refers to an electric heating device capable of resistance heating or electromagnetic heating. Besides bringing the food to cooking temperature, heating element 11 also needs to heat the water in water pipe 12 to its phase change temperature. Water pipe 12 is a pipe that supplies water and outputs steam after the phase change. To improve the heating efficiency of the water in water pipe 12, it should be installed close to heating element 11. Water pipe 12 can be made of food-grade stainless steel or plastic.

[0039] Water pipe 12 has an inlet 121 for liquid water to enter and an outlet 122 for steam to exit. Figure 2 For example, the water inlet 121 and the steam outlet 122 are both set perpendicular to the plane where the water pipe 12 is located. Of course, the water inlet 121 and the steam outlet 122 can also be set in the plane where the water pipe 12 is located. This utility model does not impose any specific restrictions.

[0040] The heat transfer medium 14 can transfer heat between the heating element 11 and the water pipe 12, improving heating efficiency, and can also conduct heat to the temperature measuring structure 13 so that the temperature measuring structure 13 can respond. In addition, the water inlet 121 and the steam outlet 122 of the water pipe 12 should extend beyond the heat transfer medium 14.

[0041] The temperature sensing structure 13 can be a temperature sensor, a temperature controller, or both. The temperature sensor can be an NTC temperature sensor or a thermocouple sensor. The temperature controller can be a snap-action temperature controller, which automatically cuts off or connects the circuit when the set temperature is reached. The temperature controller can also be a proportional temperature controller or a power-adjustable temperature controller, which can adjust the heating power according to the set temperature.

[0042] The flow direction of water pipe 12 refers to the direction in which liquid water and high-temperature steam are transported within water pipe 12, and also to the direction of extension of water pipe 12. When water pipe 12 is a circular pipe, the flow direction of water pipe 12 is the circumferential direction of water pipe 12. When water pipe 12 is a straight pipe, the flow direction of water pipe 12 is the direction from water inlet 121 to air outlet 122, and also refers to the length direction of water pipe 132.

[0043] The distance between the temperature measuring structure 13 and the steam outlet 122 refers to the distance along the flow direction of the water pipe 12. When the water pipe 12 is a horizontal straight pipe, the distance between the temperature measuring structure 13 and the steam outlet 122 is a straight line distance. When the water pipe 12 is a circular pipe, the distance between the temperature measuring structure 13 and the steam outlet 122 is an arc distance.

[0044] The distance between the temperature measuring structure 13 and the steam outlet 122 is less than or equal to half the length of the water pipe 12, meaning that the temperature measuring structure 13 is located in or closer to the steam region of the water pipe 12. When water is injected into the water pipe 12, part of the water pipe 12 is a low-temperature liquid water region, and the other part is a high-temperature steam region. That is, the water pipe 12 has a phase change point. The area between the phase change point and the steam outlet 122 is the steam region. Before the phase change point, the water pipe 12 contains liquid water, and after the phase change point, the water pipe 12 contains steam. After the liquid water enters the water pipe 12, it is heated into steam at the midpoint of the length of the water pipe 12 or closer to the steam outlet 122 (downstream of the water pipe 12). Therefore, the temperature of the entire composite heating plate 100 is not uniform; when no water is injected into the water pipe 12, the temperature of the entire water pipe 12 is relatively uniform. By placing the temperature measuring structure 13 in the steam area of ​​the water pipe 12, the temperature of the higher temperature area on the composite heating plate can be detected more accurately, thereby ensuring that the temperature of the entire composite heating plate 100 meets the cooking requirements.

[0045] In the technical solution of this utility model, a temperature measuring structure 13 is set to monitor the temperature. In some embodiments, the temperature measuring structure 13 is located in the steam area of ​​the water pipe 12. This allows the temperature of the composite hot plate 100 to meet the cooking requirements and enables it to react quickly (power off or power down) when the temperature is higher than the preset value of the temperature measuring structure 13, thereby avoiding the risk of the plate melting.

[0046] According to some embodiments of the present invention, the distance between the temperature measuring structure 13 and the heating tube 11 is less than the distance between the temperature measuring structure 13 and the water pipe 12.

[0047] The distance between the temperature measuring structure 13 and the heating element 11 is less than the distance between the temperature measuring structure 13 and the water pipe 12. This means that the temperature measuring structure 13 is set closer to the heating element 11 than the water pipe 12, which allows the temperature measuring structure 13 to respond to the temperature in a timely manner.

[0048] According to some embodiments of this utility model, the distance between the temperature measuring structure 13 and the outer wall of the heating tube 11 is less than or equal to 5 times the diameter of the heating tube 11. That is, the temperature measuring structure 13 is set as close as possible to the heating tube 11 to improve temperature control accuracy.

[0049] According to some embodiments of this utility model, reference Figure 1 , 3As shown in Figure 8, the temperature measuring structure 13 is disposed on the side of the heat-conducting medium 14 facing away from the cooking cavity. The temperature measuring surface of the temperature measuring structure 13 faces the heating tube 11 and / or water pipe 12. The projection of the heating tube 11 and / or water pipe 12 along the thickness direction of the composite heating plate 100 falls on the temperature measuring surface of the temperature measuring structure 13.

[0050] by Figure 1 Taking the aforementioned angle as an example, the temperature measuring structure 13 is positioned above the heat-conducting medium 14, meaning the temperature measuring structure 13 and the heat-conducting medium 14 are distributed vertically. In this case, the temperature measuring structure 13 can be correspondingly positioned with the heating element 11. Figure 1 , 3 As shown in Figure 8, in other embodiments, the temperature measuring structure 13 can also be arranged vertically corresponding to the water pipe 12, or partially corresponding to the heating element 11 and partially corresponding to the water pipe 12. The temperature measuring surface of the temperature measuring structure 13 is directly in contact with the heat-conducting medium 14, which can improve the accuracy of temperature measurement.

[0051] According to some embodiments of this utility model, both the heating element 11 and the water pipe 12 are arranged circumferentially along the composite heating plate 100, with the heating element 11 sleeved around the outer periphery of the water pipe 12, or, referring to... Figure 1-8 As shown, the water pipe 12 is sleeved around the heating tube 11; the part of the heat-conducting medium 14 that covers the heating tube 11 and the water pipe 12 is the outer ring part, and the thickness of the outer ring part is greater than the thickness of the inner ring part of the heat-conducting medium 14. The temperature measuring structure 13 is set on the outer ring part.

[0052] by Figure 3-8 For example, to improve the heating efficiency of the composite heating plate 100, the heat-conducting medium 14 is not only disposed on the heating tube 11 and the water pipe 12, but also extends towards the center of the composite heating plate 100. This extended portion is the inner ring of the heat-conducting medium 14, while the portion covering the heating tube 11 and the water pipe 12 is the outer ring of the heat-conducting medium. Since the outer ring needs to cover the heating tube 11 and the water pipe 12, while the inner ring only needs to contact the cooking cavity, the thickness of the outer ring is greater than the thickness of the inner ring.

[0053] The temperature measuring structure 13 is located on the outer ring, corresponding to the heating element 11 and / or the water pipe 12, to ensure the accuracy of temperature measurement. The heat-conducting medium 14 is located on the inner ring, which can increase the contact area between the heat-conducting medium 14 and the cooking cavity, thereby improving heating efficiency.

[0054] According to some embodiments of the present invention, the composite heat plate 100 satisfies at least one of the following conditions: the heat-conducting medium 14 is integrally formed with the heating tube 11 and the water pipe 12; the heat-conducting medium 14 is aluminum; and the heating tube 11 and the water pipe 12 are circular tubes.

[0055] The heat transfer medium 14 is integrally formed with the heating element 11 and water pipe 12, facilitating processing. Aluminum has excellent thermal conductivity, which can improve the heat transfer efficiency of the heat transfer medium 14; specifically, die-cast aluminum ADC12 can be selected. (Reference) Figure 2 As shown, both the heating element 11 and the water pipe 12 are circular tubes, which allows the water pipe 12 to receive more heat, thereby improving the steam production efficiency. Figure 2 For example, the water pipe 12 is located on the outside of the heating element 11, which facilitates the connection of the water pipe 12 with other components.

[0056] According to some embodiments of this utility model, this utility model provides an outer pot assembly, see reference. Figure 3-8 As shown, the assembly includes an outer pot 200 and any of the aforementioned composite heating plates 100. The outer pot 200 has a cavity for holding the inner pot. The composite heating plate 100 is connected to the outer pot 200, and the heat-conducting medium 14 of the composite heating plate 100 can contact the bottom wall of the inner pot placed in the cavity. The specific structure of the composite heating plate 100 is as described in the above embodiments. Since the outer pot assembly adopts all the technical solutions of all the above embodiments, it has at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be described in detail here.

[0057] According to some embodiments of the present invention, the heat-conducting medium 14 is located inside the receiving cavity, and the temperature measuring structure 13 is installed on the outer pot 200.

[0058] refer to Figure 3 and 4 As shown, in use, the composite heating plate 100 is located at the bottom of the receiving cavity of the outer pot 200, so that the heat-conducting medium 14 can contact the bottom wall of the inner pot.

[0059] The temperature measuring structure 13 is installed on the outer pot 200. This means that a through hole 21 is opened on the bottom wall of the outer pot 200, and the temperature measuring structure 13 is installed at the through hole 21. At this time, the temperature measuring structure 13 passes through the through hole 21 and is in contact with the heat-conducting medium 14. Specifically, the temperature measuring structure 13 and the heat-conducting medium 14 can be tightly fixed with bolts. The through hole 21 on the bottom wall of the outer pot 200 can meet the needs of subsequent installation of the temperature measuring structure 13.

[0060] According to some embodiments of the present invention, further reference is made to Figure 4 As shown, a boss 141 extends from the heat-conducting medium 14, and the temperature measuring structure 13 is attached to the boss 141.

[0061] by Figure 4 For example, the lower surface of the heat-conducting medium 14 is provided with a downwardly extending boss 141. In order to achieve heat transfer, the lower surface of the boss 141 is set to be a plane in this embodiment, so that the temperature measuring structure 13 can be tightly fitted with the boss 141.

[0062] According to some embodiments of this utility model, reference Figure 5-8 As shown, the heat-conducting medium 14 is located inside the receiving cavity, and the temperature-sensing structure 13 is attached to the outer wall of the outer pot 200. The position on the heat-conducting medium 14 corresponding to the temperature-sensing structure 13 is attached to the inner wall of the outer pot 200. This embodiment can eliminate the need to make holes in the outer pot 200, avoiding the risk of water splashing onto the temperature-sensing structure 13 when the user adds water.

[0063] According to some embodiments of the present invention, a boss 141 extends on the heat-conducting medium 14, and the temperature measuring structure 13 and the boss 141 are respectively attached to the opposite sides of the outer pot 200.

[0064] The temperature measuring structure 13 and the boss 141 are respectively attached to opposite sides of the outer pot 200 wall. This means that the outer pot 200 wall is sandwiched between the temperature measuring structure 13 and the boss 141. In this embodiment, the boss 141 transfers heat to the temperature measuring structure 13 through the outer pot 200. Figure 6 For example, the boss 141 is attached to the inner bottom wall of the outer pot 200, and the temperature measuring structure 13 is correspondingly attached to the outer bottom wall of the outer pot 200. Specifically, the temperature measuring structure 13, the outer pot 200, and the boss 142 can be tightly fixed with bolts. In this way, heat is conducted to the boss 141, and then to the temperature measuring structure 13 through the outer pot 200.

[0065] In some embodiments, a heat-conducting bracket 15 may also be provided on the heat-conducting medium 14, and the temperature measuring structure 13 and the heat-conducting bracket 15 may be respectively attached to the opposite sides of the outer pot 200.

[0066] by Figure 8 For example, the lower surface of the heat-conducting medium 14 does not extend to form a protrusion 141. In this case, the upper surface of the heat-conducting bracket 15 is fitted to the lower surface of the heat-conducting medium 14, and the lower surface of the heat-conducting bracket 15 is fitted to the inner bottom wall of the outer pot 200. The temperature-measuring structure 13 is fitted to the outer bottom wall of the outer pot 200. Specifically, the temperature-measuring structure 13, the outer pot 200, the heat-conducting bracket 15, and the heat-conducting medium 14 can be tightly fixed with bolts. In this way, heat is conducted through the heat-conducting medium 14 to the heat-conducting bracket 15, and then through the outer pot 200 to the temperature-measuring structure 13.

[0067] It should be noted that the arrangement of the temperature measuring structure 13 is not limited to the specific example above. In some other embodiments, when the temperature measuring structure 13 is installed on the outer pot 200, a heat-conducting bracket 15 can also be provided between the temperature measuring structure 13 and the heat-conducting medium 14. In this case, a boss 141 can be extended on the heat-conducting medium 14, or the boss 141 can be omitted.

[0068] According to some embodiments of this utility model, this utility model also provides a rice cooker, including an inner pot and any of the aforementioned outer pot components, wherein the inner pot is housed within the receiving cavity of the outer pot 200. The specific structure of the outer pot component is as described in the above embodiments. Since the rice cooker adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, and will not be elaborated further here.

[0069] According to some embodiments of the present invention, the steam outlet 122 of the water pipe 12 is connected to the inner pot to deliver steam into the inner pot. In some embodiments, the lid of the rice cooker is provided with a nozzle, which is connected to the steam outlet 122 through a pipe. When the lid is closed, the nozzle is located inside the inner pot, thereby delivering steam into the inner pot.

[0070] According to some embodiments of this utility model, reference Figure 1-4 As shown, this utility model provides an outer pot assembly, including a composite heating plate 100 and an outer pot 200. The composite heating plate 100 includes a heating element 11, a water pipe 12, a temperature measuring structure 13, and a heat-conducting medium 14. The heating element 11 is a resistance heating device, and the heating element 11 is wound into a circle. The water pipe 12 is used to supply liquid water input and steam output. The water pipe 12 is also wound into a circle and is located outside the heating element 11. The water pipe 12 has a water inlet 121 and a steam outlet 122, which are located at both ends of the water pipe 12 and are both perpendicular to the plane where the water pipe 12 is located. Liquid water enters the water pipe 12 from the inlet 121. Under the heating action of the heating tube 11, the liquid water phase changes into high-temperature steam and is output from the steam outlet 122. The phase change point of the liquid water is located downstream of the water pipe 12, that is, in the direction from the inlet 121 to the steam outlet 122. The phase change point is located after 1 / 2 of the length of the water pipe 12.

[0071] A heat-conducting medium 14, made of aluminum, covers the heating element 11 and the water pipe 12. A boss 141 extends from the lower surface of the heat-conducting medium 14, located below the heating element 11, and a boss 142 is positioned downstream of the water pipe 12. A temperature-sensing structure 13 is installed on the bottom wall of the outer pot 200 and is fixed to the boss 141 by bolts. The temperature-sensing structure 13 is a snap-action thermostat.

[0072] According to some embodiments of this utility model, reference Figure 5 and 6As shown, this utility model provides an outer pot assembly, including a composite heating plate 100 and an outer pot 200. The composite heating plate 100 includes a heating element 11, a water pipe 12, a temperature measuring structure 13, and a heat-conducting medium 14. The heating element 11 is a resistance heating device, and the heating element 11 is wound into a circle. The water pipe 12 is used to supply liquid water input and steam output. The water pipe 12 is also wound into a circle and is located outside the heating element 11. The water pipe 12 has a water inlet 121 and a steam outlet 122, which are located at both ends of the water pipe 12 and are both perpendicular to the plane where the water pipe 12 is located. Liquid water enters the water pipe 12 through the inlet 121. Under the heating action of the heating tube 11, the liquid water phase changes into high-temperature steam and is output from the steam outlet. The phase change point of the liquid water is located downstream of the water pipe 12, that is, in the direction from the inlet 121 to the steam outlet 122. The phase change point is located after 1 / 2 of the length of the water pipe 12.

[0073] A heat-conducting medium 14, made of aluminum, covers the heating element 11 and the water pipe 12. A boss 141 extends from the lower surface of the heat-conducting medium 14 downwards to the inner bottom wall of the outer pot 200. The boss 141 is located below the heating element 11, and a boss 142 is positioned downstream of the water pipe 12. A temperature-sensing structure 13 is attached and fixed to the outer bottom wall of the outer pot 200, and is bolted to the outer pot 200 and the boss 141. The temperature-sensing structure 13 is a snap-action thermostat.

[0074] According to some embodiments of this utility model, reference Figure 7 and 8 As shown, this utility model provides an outer pot assembly, including a composite heating plate 100 and an outer pot 200. The composite heating plate 100 includes a heating element 11, a water pipe 12, a temperature measuring structure 13, a heat-conducting medium 14, and a heat-conducting support 15. The heating element 11 is a resistance heating device, and the heating element 11 is wound into a circle. The water pipe 12 is used to supply liquid water input and steam output. The water pipe 12 is also wound into a circle and is located outside the heating element 11. The water pipe 12 has a water inlet 121 and a steam outlet 122, which are located at both ends of the water pipe 12 and are both perpendicular to the plane where the water pipe 12 is located. Liquid water enters the water pipe 12 through the inlet 121. Under the heating action of the heating tube 11, the liquid water phase changes into high-temperature steam and is output from the steam outlet. The phase change point of the liquid water is located downstream of the water pipe 12, that is, in the direction from the inlet 121 to the steam outlet 122. The phase change point is located after 1 / 2 of the length of the water pipe 12.

[0075] A heat-conducting medium 14, made of aluminum, covers the heating element 11 and the water pipe 12. A heat-conducting bracket 15 is attached to the lower surface of the heat-conducting medium 14 and is fitted to the inner bottom wall of the outer pot 200. A temperature-sensing structure 13 is attached to the outer bottom wall of the outer pot 200 and is bolted to the outer pot 200, the heat-conducting bracket 15, and the heat-conducting medium 14. The temperature-sensing structure 13 is a snap-action thermostat.

[0076] The above description is merely an exemplary embodiment of the present utility model and does not limit the patent scope of the present utility model. Any equivalent structural transformations made based on the technical concept of the present utility model and the contents of the present utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of the present utility model.

Claims

1. A composite heating plate, characterized in that, include: Heating element; A water pipe having a water inlet and a steam outlet, the water inlet and the steam outlet being located at opposite ends of the water pipe; A heat-conducting medium, which is wrapped around the heating element and the water pipe; The temperature measuring structure is located along the flow direction of the water pipe, and the distance between the temperature measuring structure and the steam outlet is less than or equal to 1 / 2 of the length of the water pipe.

2. The composite heating plate as described in claim 1, characterized in that, The distance between the temperature measuring structure and the heating element is less than the distance between the temperature measuring structure and the water pipe.

3. The composite heating plate as described in claim 2, characterized in that, The distance between the temperature measuring structure and the outer wall of the heating tube is less than or equal to 5 times the diameter of the heating tube.

4. The composite heating plate as described in any one of claims 1 to 3, characterized in that, The temperature measuring structure is disposed on the side of the heat-conducting medium facing away from the cooking cavity. The temperature measuring surface of the temperature measuring structure faces the heating element and / or the water pipe. The projection of the heating element and / or the water pipe along the thickness direction of the composite heating plate falls on the temperature measuring surface of the temperature measuring structure.

5. The composite heating plate as described in claim 4, characterized in that, Both the heating element and the water pipe are arranged circumferentially along the composite heat plate. The heating element is sleeved around the water pipe, or the water pipe is sleeved around the heating element. The portion of the heat-conducting medium covering the heating element and the water pipe is the outer ring portion. The thickness of the outer ring portion is greater than the thickness of the inner ring portion of the heat-conducting medium. The temperature measuring structure is disposed on the outer ring portion.

6. The composite heating plate according to any one of claims 1 to 3, characterized in that, The composite heat plate satisfies at least one of the following conditions: The heat-conducting medium is integrally formed with the heating element and the water pipe; The thermally conductive medium is aluminum; The heating element and water pipe are circular.

7. An outer pot assembly, characterized in that, The invention includes an outer pot and a composite heating plate as described in any one of claims 1 to 6, wherein the outer pot has a cavity for placing an inner pot, the composite heating plate is connected to the outer pot, and the heat-conducting medium of the composite heating plate is able to contact the bottom wall of the inner pot placed in the cavity.

8. The outer pot assembly as described in claim 7, characterized in that, The heat-conducting medium is located inside the containment cavity, and the temperature measuring structure passes through the outer pot.

9. The outer pot assembly as described in claim 7, characterized in that, The heat-conducting medium has protrusions extending from it, and the temperature-sensing structure is fitted to the protrusions.

10. The outer pot assembly as claimed in claim 7, characterized in that, The heat-conducting medium is located inside the receiving cavity, the temperature measuring structure is attached to the outer wall of the outer pot, and the position on the heat-conducting medium corresponding to the temperature measuring structure is attached to the inner wall of the outer pot.

11. The outer pot assembly as claimed in claim 10, characterized in that, The heat-conducting medium has protrusions extending from it, and the temperature-measuring structure is respectively attached to the opposite sides of the outer pot wall, corresponding to the protrusions; or... A heat-conducting bracket is provided on the heat-conducting medium, and the temperature measuring structure and the heat-conducting bracket are respectively attached to the opposite sides of the outer pot wall.

12. An electric rice cooker, characterized in that, It includes an inner pot and an outer pot assembly as described in any one of claims 7 to 11, wherein the inner pot is housed within the receiving cavity of the outer pot.

13. The rice cooker as described in claim 12, characterized in that, The steam outlet of the water pipe is connected to the inner pot to supply steam into the inner pot.

Images