Heating disc structure, outer pot assembly and electric cooker

Abstract

The utility model discloses a heating disc structure, an outer pot assembly and an electric cooker, and relates to the technical field of life electric appliances, and the heating disc structure comprises a heating disc, an electric heating pipe and a water guide pipe; the heating disc is provided with a virtual plane which passes through the center of the heating disc and is perpendicular to the disc surface, and the virtual plane divides the heating disc into a first area and a second area; the electric heating tube is embedded in the heating disc, and a power-on terminal of the electric heating tube is located in the first area; the inlet section and the outlet section of the water guide pipe are located in the second area; heat generated by the electric heating pipe can be transmitted to the water guide pipe so that water flowing through the water guide pipe can be heated to generate steam. According to the technical scheme, water and electricity separation design can be achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of household appliances, in particular to a heating plate structure, an outer pot assembly and an electric rice cooker. Background Art

[0002] Conventional electric rice cookers usually generate steam by a steam generator device and then introduce the steam into the inner pot cavity. It is necessary to design a separate steam generator device, so that additional space needs to be set in the electric rice cooker to accommodate the steam generator device, resulting in a large volume of the electric rice cooker.

[0003] In view of the above problems, related technologies add a water guide pipe in the heating plate. When the electric heating pipe operates, the water flowing through the water guide pipe is heated, so that the water therein forms steam and is introduced into the inner pot cavity. However, there are electrical safety problems when the electric heating pipe and the water guide pipe are simultaneously arranged on the heating plate. Summary of the Utility Model

[0004] The main object of the utility model is to provide a heating plate structure, an outer pot assembly and an electric rice cooker, aiming to achieve the design of separation of water and electricity.

[0005] To achieve the above object, a heating plate structure proposed by the utility model includes:

[0006] A heating plate having a virtual plane passing through its center and perpendicular to the plate surface, and the virtual plane divides the heating plate into a first region and a second region;

[0007] An electric heating pipe embedded in the heating plate, and the energized terminals of the electric heating pipe are located in the first region;

[0008] A water guide pipe embedded in the heating plate, and the inlet section and the outlet section of the water guide pipe are located in the second region; the heat generated by the electric heating pipe can be transferred to the water guide pipe, so that the water flowing through the water guide pipe is heated to generate steam.

[0009] In an embodiment, the first region has a first end that is the farthest from the second region, and the second region has a second end that is the farthest from the first region;

[0010] The energized terminals of the electric heating pipe are arranged at the first end, and the inlet section and the outlet section of the water guide pipe are arranged at the second end;

[0011] Alternatively, the shortest distance from the energized terminal to the virtual plane is not less than 1 / 2 of the radius of the heating plate, and the shortest distances from the inlet section and the outlet section to the virtual plane are both not less than 1 / 2 of the radius of the heating plate.

[0012] In an embodiment, the inlet section and the outlet section of the water guide pipe are both provided with adapter pipes, and the openings of the adapter pipes do not point to the first region.

[0013] In one embodiment, the opening direction of the adapter pipe provided in the inlet section is different from that of the adapter pipe provided in the outlet section.

[0014] In one embodiment, the opening direction of the adapter pipe provided in the inlet section faces away from the first region.

[0015] In one embodiment, the opening of the adapter pipe is horizontally arranged or inclined downward.

[0016] In one embodiment, the water guide pipe includes an inlet section, an outlet section, and a steam generation section. Both the inlet section and the outlet section are connected to both ends of the steam generation section through bent sections;

[0017] And / or, the power of the electric heating tube is 800W - 2500W;

[0018] And / or, the distance L between the water guide pipe and the electric heating tube is L ≤ 20mm.

[0019] In one embodiment, the water guide pipe includes an inlet section, an outlet section, and a steam generation section. The inlet section and the outlet section are respectively communicated with both ends of the steam generation section. The pipe sections of the electric heating tube near the two energized terminals overlap in the circumferential direction to form a strong heating area, and in the radial direction of the heating plate, the steam generation section overlaps with the strong heating area.

[0020] To achieve the above object, the present invention also provides an outer pot assembly, including:

[0021] An outer pot;

[0022] The heating plate structure as described above, provided in the outer pot.

[0023] In one embodiment, the outer pot is provided with a first through hole, and both the inlet section and the outlet section of the water guide pipe extend out of the outer pot through the first through hole;

[0024] And / or, the outer pot is provided with a second through hole, and the energized terminals of the electric heating tube extend out of the outer pot through the second through hole.

[0025] To achieve the above object, the present invention also provides a rice cooker, including:

[0026] A base;

[0027] The outer pot assembly as described above, provided on the base;

[0028] An inner pot, provided in the outer pot of the outer pot assembly.

[0029] In one embodiment, a water baffle is provided on the base, and the water baffle is disposed between the energized terminals of the electric heating tube and the inlet section and the outlet section of the water guide tube.

[0030] The technical solution of the present utility model heats the water flowing through the water guide tube by directly using the heat generated by the electric heating tube in the heating plate through adding a water guide tube in the heating plate, so that the water flowing through the water guide tube is heated to generate steam, and the steam can be introduced into the inner pot cavity through the outlet of the water guide tube. There is no need to design a separate steam generating device, so there is no need to set extra space in the rice cooker to accommodate the steam generator device, which can effectively reduce the volume of the rice cooker and reduce the cost.

[0031] In addition, by making the energized terminals of the electric heating tube located in the first area of the heating plate and making the inlet section and the outlet section of the water guide tube located in the second area of the heating plate, the energized terminals of the electric heating tube are designed to be far away from the inlet section and the outlet section of the water guide tube to achieve the separation design of water and electricity, thereby improving the effect of safety protection. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can be obtained based on the structures shown in these drawings without creative efforts.

[0033] Figure 1 FIG. is a schematic structural diagram of an embodiment of the heating plate structure provided by the present utility model;

[0034] Figure 2 FIG. is a schematic structural diagram of the electric heating tube and the water guide tube in an embodiment of the heating plate structure provided by the present utility model;

[0035] Figure 3 FIG. is a schematic structural diagram of an embodiment of the outer pot assembly provided by the present utility model;

[0036] Figure 4 FIG. is a bottom view of an embodiment of the outer pot assembly provided by the present utility model;

[0037] Figure 5 FIG. is a partial structural cross-sectional view of an embodiment of the rice cooker provided by the present utility model;

[0038] Figure 6 For Figure 5 the partial enlarged view at A in

[0039] Explanation of the reference numerals in the drawings:

[0040]

[0041]

[0042] The realization of the purpose, functional characteristics and advantages of the present utility model will be further described in conjunction with embodiments with reference to the accompanying drawings. Specific embodiments

[0043] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0044] It should be noted that if there are directional indications (such as up, down, left, right, front, back...) involved in the embodiments of the present utility model, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture. If the specific posture changes, the directional indications will also change accordingly.

[0045] In addition, if there are descriptions such as "first", "second", etc. involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature. In addition, if "and / or" or "and / or" appears throughout the text, its meaning includes three parallel solutions. Taking "A and / or B" as an example, it includes solution A, solution B, or a solution where A and B are satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the fact that those of ordinary skill in the art can implement them. When the combination of technical solutions results in contradictions or cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0046] Traditional rice cookers usually use a steam generator device to generate steam and then introduce it into the inner pot cavity. It is necessary to design a separate steam generator device, so it is necessary to set additional space in the rice cooker to accommodate the steam generator device, resulting in a large volume of the rice cooker.

[0047] In response to the above problems, related technologies add a water guide pipe in the heating plate. When the electric heating tube operates, it will heat the water flowing through the water guide pipe, so that the water in it forms steam and is introduced into the inner pot cavity. However, there are electrical safety problems when the electric heating tube and the water guide pipe are simultaneously arranged on the heating plate.

[0048] Based on the above problems, the present utility model proposes a heating plate structure 10, aiming to achieve the design of water and electricity separation. It can be understood that the heating plate structure 10 can be applied to devices such as rice cookers, air fryers, and electric pressure cookers. In some cases, the heating plate structure 10 is applied to a rice cooker 1000, which includes a base 200, an outer pot assembly 100, and an inner pot. The outer pot assembly 100 includes an outer pot 20 and the heating plate structure 10. The outer pot 20 is disposed on the base 200, the heating plate structure 10 is provided on the outer pot 20, the inner pot is disposed inside the outer pot 20, and the heating plate structure 10 is located below the inner pot. When the electric heating tube 12 of the heating plate structure 10 works, the generated heat can, on the one hand, heat and cook the food in the inner pot cavity through the heating plate 11, and on the other hand, it can also be transferred to the water guide pipe 13, so that the water flowing through the water guide pipe 13 is heated to generate steam, and the steam can be introduced into the inner pot cavity through the outlet of the water guide pipe 13; and, by designing the energized terminal 122 of the electric heating tube 12 to be far away from the inlet section 131 and the outlet section 132 of the water guide pipe 13, the design of water and electricity separation is achieved, thereby enhancing the safety protection effect. The structure of the present heating plate structure 10 will be described below by way of examples.

[0049] Please refer to Figure 1 、 Figure 2 In an embodiment of the present utility model, the heating plate structure 10 includes a heating plate 11, an electric heating tube 12, and a water guide pipe 13; the heating plate 11 has a virtual plane 11a passing through its center and perpendicular to the plate surface, and the virtual plane 11a divides the heating plate 11 into a first region S1 and a second region S2; the electric heating tube 12 is embedded in the heating plate 11, and the energized terminal 122 of the electric heating tube 12 is located in the first region S1; the water guide pipe 13 is embedded in the heating plate 11, and the inlet section 131 and the outlet section 132 of the water guide pipe 13 are located in the second region S2; the heat generated by the electric heating tube 12 can be transferred to the water guide pipe 13, so that the water flowing through the water guide pipe 13 is heated to generate steam.

[0050] In some cases, such as when the heating plate structure 10 is applied to a rice cooker, the outlet of the water guide pipe 13 can be communicated with the inner pot cavity of the rice cooker 1000, so that the steam can be delivered into the inner pot cavity.

[0051] It can be understood that the heating plate 11 can be in a disc-shaped structure, with a cavity formed inside for installing other structures such as the electric heating tube 12 and the water guide pipe 13. To ensure the structural strength, high-temperature resistance, and heat conduction performance of the heating plate 11, the heating plate 11 can be made of sheet metal parts. In actual application, the heating plate 11 can be an integrally formed structure or a split structure divided into two, three, or more structural components. When the heating plate 11 is an integrally formed structure, the electric heating tube 12 and the water guide pipe 13 can be formed in the heating plate 11 in an integrally formed manner. For example, the molten material used to form the heating plate 11 flows around the electric heating tube 12 and the water guide pipe 13, and after cooling, the electric heating tube 12 and the water guide pipe 13 can be embedded in the heating plate 11. Of course, to facilitate the installation of other structures such as the electric heating tube 12 and the water guide pipe 13, the heating plate 11 is preferably a split structure divided into two upper and lower covers.

[0052] In actual application, the electric heating tube 12 can be entirely embedded inside the heating plate 11, or the heating part of the electric heating tube 12 can be embedded inside the heating plate 11, while the power connection terminal 122 of the electric heating tube 12 extends outside the heating plate 11 to facilitate the connection between the power connection terminal 122 and the power supply structure. Also, the water guide pipe 13 can be entirely embedded inside the heating plate 11, or the steam generation part of the water guide pipe 13 can be embedded inside the heating plate 11, while the inlet and outlet ends of the water guide pipe 13 extend outside the heating plate 11 to facilitate the connection between the inlet and outlet ends and the adapter pipe 13a. Here, the steam generation part of the water guide pipe 13 refers to the pipe section of the water guide pipe 13 that can receive the heat transferred from the heating plate 11 when the electric heating tube 12 is working, and the water flowing through this part can be heated to form steam.

[0053] In actual application, the shape of the electric heating tube 12 can be annular, spiral tubular, straight tubular, wavy tubular, arc tubular, etc.; also, the shape of the water guide pipe 13 can be annular, spiral tubular, straight tubular, wavy tubular, arc tubular, etc., as long as the heat generated by the electric heating tube 12 can be transferred to the water guide pipe 13 to heat the water flowing through the water guide pipe 13 to generate steam.

[0054] It should be noted that in some embodiments, the first region S1 of the heating plate 11 is a charged region, and the second region S2 of the heating plate 11 is a non-charged region.

[0055] In summary, the technical solution of the present utility model generates heat through the electric heating tube 12 in the heating plate 11 to directly heat the water flowing through the water guide pipe 13, so that the water flowing through the water guide pipe 13 is heated to generate steam. The steam can be introduced into the inner pot cavity through the outlet of the water guide pipe 13, eliminating the need to design a separate steam generating device. Therefore, there is no need to set additional space in the rice cooker 1000 to accommodate the steam generator device, which can effectively reduce the volume of the rice cooker 1000 and lower the cost.

[0056] In addition, by making the energized terminal 122 of the electric heating tube 12 located in the first region S1 of the heating plate 11 and making the inlet section 131 and the outlet section 132 of the water guide pipe 13 located in the second region S2 of the heating plate 11, the energized terminal 122 of the electric heating tube 12 is designed to be far away from the inlet section 131 and the outlet section 132 of the water guide pipe 13, so as to achieve the design of water and electricity separation, thereby enhancing the safety protection effect.

[0057] Please refer to Figure 1 、 Figure 2 In an embodiment of the present utility model, the first region S1 has a first end that is the farthest from the second region S2, and the second region S2 has a second end that is the farthest from the first region S1; the energized terminal 122 of the electric heating tube 12 is arranged at the first end, and the inlet section 131 and the outlet section 132 of the water guide pipe 13 are arranged at the second end.

[0058] With this setting, by arranging the energized terminal 122 of the electric heating tube 12 at the first end of the first region S1 that is the farthest from the second region S2 and arranging the inlet section 131 and the outlet section 132 of the water guide pipe 13 at the second end of the second region S2 that is the farthest from the first region S1, the energized terminal 122 of the electric heating tube 12 and the inlet section 131 and the outlet section 132 of the water guide pipe 13 can be distributed at the farthest distance on the heating plate 11 to fully ensure the water and electricity separation effect.

[0059] In another embodiment of the present utility model, the shortest distance from the energized terminal 122 to the virtual plane 11a is not less than 1 / 2 of the radius of the heating plate 11, and the shortest distances from the inlet section 131 and the outlet section 132 to the virtual plane 11a are both not less than 1 / 2 of the radius of the heating plate 11. It can be understood that the shortest distance from the energized terminal 122 to the inlet section 131 and the outlet section 132 is not less than the radius of the heating plate 11.

[0060] With this setting, the energized terminal 122 of the electric heating tube 12 and the inlet section 131 and the outlet section 132 of the water guide pipe 13 can be distributed at the farthest possible distance on the heating plate 11 to fully ensure the water and electricity separation effect.

[0061] Please refer to Figure 3 、 Figure 4, in an embodiment of the present utility model, both the inlet section 131 and the outlet section 132 of the water conduit 13 are provided with adapter pipes 13a, and the openings of the adapter pipes 13a do not point to the first region S1.

[0062] It can be understood that during use, adapter pipes 13a can be installed at both the inlet section 131 and the outlet section 132 of the water conduit 13 to be connected to an external hose through the adapter pipes 13a. Among them, the hose connected to the inlet section 131 can be connected to the water tank inside the rice cooker 1000 to supply water into the water conduit 13 through this hose; while the hose connected to the outlet section 132 can be connected to the inner pot cavity of the rice cooker 1000 to supply steam into the inner pot cavity through this hose.

[0063] With such a setting, by providing adapter pipes 13a at both the inlet section 131 and the outlet section 132 of the water conduit 13, it is convenient to connect the inlet section 131 and the outlet section 132 to an external hose. And by making the openings of the adapter pipes 13a not point to the first region S1, in this way, it can be avoided that after the hose connected to the adapter pipe 13a is disconnected, water and steam are sprayed onto the first region S1, resulting in a short circuit.

[0064] It can be understood that in this application, the statement that the opening does not point to the first region S1 means that the orientation F1 of the opening and the direction F2 starting from this opening towards the direction close to the first region S1 are different.

[0065] In actual application, the adapter pipe 13a can be a straight tubular structure, with one end connected to the inlet section 131 or the outlet section 132 and the other end connected to an external hose; or, the adapter pipe 13a can also include a first pipe section and a second pipe section arranged at an angle, with the first pipe section connected to the inlet section 131 or the outlet section 132 and the second pipe section connected to an external hose.

[0066] Please refer to Figure 3 、 Figure 4 , in an embodiment of the present utility model, the opening orientations of the adapter pipes 13a provided at the inlet section 131 are different from the opening orientations of the adapter pipes 13a provided at the outlet section 132.

[0067] With such a setting, it can be avoided that there is a misinstallation between the adapter pipe 13a connected to the inlet section 131 and the adapter pipe 13a connected to the outlet section 132.

[0068] Please refer to Figure 3 、 Figure 4 , in an embodiment of the present utility model, the opening orientation of the adapter pipe 13a provided at the inlet section 131 faces away from the direction of the first region S1.

[0069] With such a setting, since the external hose connected to the adapter pipe 13a provided at the inlet section 131 supplies water to the guide water pipe 13, by setting the opening of the adapter pipe 13a provided at the inlet section 131 to face away from the first area S1, after the hose connected to the adapter pipe 13a is detached, it is possible to avoid water spraying towards the first area S1, so it will not spray towards the first area S1, and the risk of short circuit can be reduced.

[0070] Please refer to Figure 3 、 Figure 4 , in an embodiment of the present utility model, the opening of the adapter pipe 13a is horizontally arranged or inclined downward.

[0071] It should be noted that the opening of the adapter pipe 13a being inclined downward means that the opening of the adapter pipe 13a is inclined towards the base 200.

[0072] With such a setting, it can be ensured that after the hose connected to the adapter pipe 13a is detached, the water directly sprays towards the base 200 of the rice cooker 1000, rather than spraying towards the outer pot 20, and the risk of short circuit can be reduced.

[0073] Please refer to Figure 2 , in an embodiment of the present utility model, the guide water pipe 13 includes an inlet section 131, an outlet section 132, and a steam generation section 133. Both the inlet section 131 and the outlet section 132 are connected to both ends of the steam generation section 133 through bending sections 134.

[0074] With such a setting, since the chamber space inside the heating plate 11 is limited, by using the bending sections 134 to connect the inlet section 131 and the outlet section 132 to the steam generation section 133, the guide water pipe 13 can be better matched with the chamber inside the heating plate 11. At the same time, the design of the bending sections 134 can smoothly lead out the inlet section 131 and the outlet section 132 from the heating plate 11.

[0075] In this embodiment, the inlet section 131, the bending section 134, the steam generation section 133, the bending section 134, and the outlet section 132 are sequentially connected to form the guide water pipe 13.

[0076] In actual application, the adjacent two sections among the inlet section 131, the bending section 134, the steam generation section 133, the bending section 134, and the outlet section 132 can be of an integrally formed structure or a split structure connected later by means such as bonding.

[0077] Among them, in order to ensure that the water flowing through the guide water pipe 13 can form steam in the steam generation section 133, the shape of the steam generation section 133 can be appropriately adjusted to extend the length of the steam generation section 133 so that the water can fully absorb heat. The steam generation section 133 can specifically be annular, wavy, spiral, etc.

[0078] It should be noted that when the diameter of the water guide pipe 13 is too small, the water flowing through the water guide pipe 13 does not have enough space to form steam after being heated, which will affect the effect of generating steam in the water guide pipe 13.

[0079] Based on this, in an embodiment of the present utility model, by making the diameter of the water guide pipe 13 not less than 6 mm, in this way, it can be ensured that the water flowing through the water guide pipe 13 has enough space to form steam after being heated, which is more conducive to generating steam.

[0080] As some examples, the diameter of the water guide pipe 13 can specifically be 6 mm, 6.5 mm, 7 mm, 7.5 mm, 8 mm, 8.5 mm, 9 mm, 9.5 mm, 10 mm, and so on.

[0081] It should be noted that when the ratio of the diameter of the circle formed by the bent section 134 to the diameter of the water guide pipe 13 is too small, it will cause a large loss of steam when flowing through the bent section 134, and affect the amount of steam.

[0082] Based on this, in an embodiment of the present utility model, by making the ratio of the diameter of the circle formed by the bent section 134 to the diameter of the water guide pipe 13 not less than 1, in this way, it can be avoided that a large loss of steam occurs when flowing through the bent section 134, so as to ensure that enough steam is introduced into the inner pot cavity of the rice cooker 1000.

[0083] As some examples, the ratio of the diameter of the circle formed by the bent section 134 to the diameter of the water guide pipe 13 can specifically be 1, 1.1, 1.2, 1.3, 1.4, 1.5, 1.6, 1.7, 1.8, 1.9, 2, 3, and so on.

[0084] Optionally, in an embodiment of the present utility model, the steam generating section 133 is annular.

[0085] With such a setting, the annular steam generating section 133 can better extend the length of the steam generating section 133, so that the water flowing through the water guide pipe 13 can fully absorb heat, which is more conducive to forming steam in the steam generating section 133.

[0086] In actual application, the steam generating section 133 can be a closed annular structure, that is, the two ends of the steam generating section 133 are in contact; or, the steam generating section 133 can also be an open annular structure, that is, the two ends of the steam generating section 133 are spaced apart.

[0087] In actual application, the water guide pipe 13 can be located outside the electric heating pipe 12, or inside the electric heating pipe 12, or above or below the electric heating pipe 12, as long as the heat generated by the electric heating pipe 12 can be transferred to the water guide pipe 13.

[0088] Moreover, the inlet section 131 and the outlet section 132 can extend along the axial direction of the circle formed by the steam generation section 133, can also extend along the radial direction of the circle formed by the steam generation section 133, or can extend in other directions, which are not specifically limited herein.

[0089] Optionally, in an embodiment of the present utility model, the electric heating tube 12 includes a heating section 121 and power-on terminals 122 connected to both ends of the heating section 121. At least part of the heating section 121 is in a ring shape, and the steam generation section 133 is arranged on the periphery of the heating section 121.

[0090] With such a setting, by making the heating section 121 of the electric heating tube 12 also in a ring shape and arranging the steam generation section 133 on the periphery of the heating section 121, the length of the steam generation section 133 can be made longer, so that the water flowing through the water guide pipe 13 can absorb more heat, which is more beneficial to forming steam in the steam generation section 133.

[0091] In actual application, the heating section 121 can be in a closed ring structure, that is, the two ends of the heating section 121 are in contact; or, the heating section 121 can also be in an open ring structure, that is, the two ends of the heating section 121 are spaced apart; or, the heating section 121 overlaps in the circumferential direction to form a heating strong area (equivalent to the two ends of the heating section 121 overlapping), and in the radial direction of the heating plate 11, the steam generation section 133 overlaps with the heating strong area.

[0092] As an example, the water guide pipe 13 includes an inlet section 131, an outlet section 132 and a steam generation section 133. The inlet section 131 and the outlet section 132 are respectively communicated with both ends of the steam generation section 133. The pipe sections of the electric heating tube 12 near the two power-on terminals 122 overlap in the circumferential direction to form a heating strong area, and in the radial direction of the heating plate 11, the steam generation section 133 overlaps with the heating strong area. Such a design can enable the heat in the heating strong area to be better received by the liquid in the water guide pipe 13, improving the heat utilization rate. It should be noted that when the heating plate 11 is not a standard circle, the above-mentioned radial direction refers to the direction from the center of the heating plate 11 to the outer edge.

[0093] Furthermore, in some embodiments, the surface of the heating plate 11 facing the food is a concave surface, or it can be said that the surface of the heating plate 11 facing the inner container is a concave surface. For such a heating plate 11, when there is less food in the inner container, the thickness of the food near the center position of the heating plate 11 is generally relatively large and requires more heat absorption. Arranging the steam generation section 133 on the outer periphery of the heating section 121 can, to a certain extent, ensure that the heating plate 11 can transfer enough heat to the food near the center position and also ensure that steam can be formed in the steam generation section 133.

[0094] Optionally, the surface of the heating plate 11 facing the foodstuff is a concave surface, and the center lines of the steam generating section 133 and the heating section 121 are located on a reference arc surface, and the bending direction of the reference arc surface is the same as the bending direction of the concave surface of the heating plate 11. By doing so, the distance between the steam generating section 133 and the concave surface can be made as close as possible to the distance between the heating section 121 and the concave surface.

[0095] Optionally, in an embodiment of the present invention, both the inlet section 131 and the outlet section 132 extend along the axial direction of the circle formed by the steam generating section 133.

[0096] With such a setting, both the inlet section 131 and the outlet section 132 can extend along the axial direction of the circle formed by the steam generating section 133, which is more convenient for connecting the inlet section 131 and the outlet section 132 to the external adapter pipe 13a.

[0097] It should be noted that when the power of the electric heating tube 12 is too small, insufficient heat can be generated. On the one hand, the temperature of the heating plate 11 is too low to achieve the cooking effect. On the other hand, the heat transferred to the water guide pipe 13 is too low, and it takes a long time to generate steam or even cannot generate steam, affecting the working efficiency and the use effect. When the power of the electric heating tube 12 is too large, the temperature of the entire heating plate 11 will be too high. When the temperature is too high, it is easy to reach the dry burning protection and stop heating continuously. Even worse, the plate will melt.

[0098] Based on this, please refer to Figure 1 、 Figure 2 In an embodiment of the present invention, by making the power of the electric heating tube 12 be 800W - 2500W, in this way, it can be ensured that while the electric heating tube 12 can generate sufficient heat, the problem of stopping heating continuously or even melting the plate due to too high temperature can be avoided. When the power of the electric heating tube 12 is within this range, it can not only generate sufficient heat, a part of the heat is directly conducted to the food through the heating plate 11, and another part of the heat acts on the food through the steam in the water guide pipe 13, and more heat can be provided to the food per unit time, but also the situation of stopping heating continuously or even melting the plate due to too high temperature can be avoided.

[0099] As some examples, the power of the electric heating tube 12 can specifically be 800W, 900W, 1000W, 1100W, 1200W, 1300W, 1400W, 1500W, 1600W, 1700W, 1800W, 1900W, 2000W, 2100W, 2200W, 2300W, 2400W, 2500W, etc.

[0100] It should be noted that when the distance between the water guide pipe 13 and the electric heating pipe 12 is too large, the heat transfer efficiency from the electric heating pipe 12 to the water guide pipe 13 is relatively low, and it takes a long time for the water guide pipe 13 to generate steam or it may not be able to generate steam at all. To improve the heat transfer efficiency, the power of the electric heating pipe 12 needs to be increased. However, if the power of the electric heating pipe 12 is too large, the temperature of the entire heating plate 11 will be too high. A too high temperature easily reaches the dry-burning protection and stops further heating. Even worse, it may melt the plate. In order to avoid the temperature of the heating plate 11 being too high, the thickness of the heating plate 11 needs to be increased to avoid overheating, which will cause the entire heating plate structure 10 to become larger and heavier, increasing the cost. In short, the distance between this water guide pipe 13 and the electric heating pipe 12 will seriously affect the size, weight, power of the heating plate 11, and the quality of the generated steam.

[0101] Based on this, please refer to Figure 3 , in an embodiment of the present utility model, by making the distance L between the water guide pipe 13 and the electric heating pipe 12 satisfy L ≤ 20 mm, in this way, the size, weight, power of the heating plate 11, and the quality of the generated steam can be guaranteed. As Figure 3 shown, the distance L here refers to the spacing between the outer peripheral surface of the water guide pipe 13 and the outer peripheral surface of the electric heating pipe 12.

[0102] As some examples, the distance L between the water guide pipe 13 and the electric heating pipe 12 can specifically be 1 mm, 2 mm, 3 mm, 4 mm, 5 mm, 6 mm, 7 mm, 8 mm, 9 mm, 10 mm, 11 mm, 12 mm, 13 mm, 14 mm, 15 mm, 16 mm, 17 mm, 18 mm, 19 mm, 20 mm, etc.

[0103] Please refer to Figure 3 , Figure 4 , the present utility model also proposes an outer pot assembly 100, which includes an outer pot 20 and a heating plate structure 10. The specific structure of the heating plate structure 10 refers to the above-mentioned embodiment. Since this outer pot assembly 100 adopts all the technical solutions of the above-mentioned all embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be elaborated here one by one. Among them, the heating plate structure 10 is arranged in the outer pot 20.

[0104] It can be understood that by arranging the heating plate structure 10 outside the outer pot 20, reliable installation of the heating plate structure 10 can be achieved. Since the heating plate structure 10 is provided with a water guide pipe 13 inside the heating plate 11, the heat generated directly by the electric heating pipe 12 in the heating plate 11 heats the water flowing through the water guide pipe 13, so that the water flowing through the water guide pipe 13 is heated to generate steam. The steam can be introduced into the inner pot cavity through the outlet of the water guide pipe 13, without the need to design a separate steam generating device. Thus, there is no need to set extra space in the rice cooker 1000 to accommodate the steam generator device, which can effectively reduce the volume of the rice cooker 1000 and reduce the cost.

[0105] In addition, by making the energized terminal 122 of the electric heating pipe 12 located in the first region S1 of the heating plate 11, and making the inlet section 131 and the outlet section 132 of the water guide pipe 13 located in the second region S2 of the heating plate 11, so that the energized terminal 122 of the electric heating pipe 12 is designed to be far away from the inlet section 131 and the outlet section 132 of the water guide pipe 13, to achieve the design of separation of water and electricity, thereby enhancing the effect of safety protection.

[0106] Please refer to Figure 3 , in an embodiment of the present invention, the outer pot 20 is provided with a first through hole 21, and both the inlet section 131 and the outlet section 132 of the water guide pipe 13 extend out of the outer pot 20 through the first through hole 21; and / or, the outer pot 20 is provided with a second through hole 22, and the energized terminal 122 of the electric heating pipe 12 extends out of the outer pot 20 through the second through hole 22.

[0107] With such an arrangement, by making the energized terminal 122 of the electric heating pipe 12 extend out of the outer pot 20 through the first through hole 21, it is convenient to connect the energized terminal 122 with the energizing structure; and by making the inlet section 131 and the outlet section 132 of the water guide pipe 13 extend out of the outer pot 20 through the second through hole 22, in this way, not only is it convenient to connect the inlet and outlet ends with the adapter pipe 13a, but also it can be avoided that after the adapter pipe 13a connected to the inlet and outlet ends is disengaged and fails, the water in the water guide pipe 13 sprays in the gap between the heating plate 11 and the outer pot 20, resulting in a short circuit, and at the same time, it can be avoided that the adapter pipe 13a is too close to the outer pot 20, causing high-temperature deformation.

[0108] In actual application, the first through hole 21 can be a long strip hole, a round hole, or other shaped holes, and no specific limitation is made here. Similarly, the second through hole 22 can also be a long strip hole, a round hole, or other shaped holes, and no specific limitation is made here.

[0109] Please refer to Figure 5 、 Figure 6, the present utility model also provides a rice cooker 1000, which includes a base 200, an outer pot assembly 100, and an inner pot. The specific structure of the outer pot assembly 100 refers to the above embodiments. Since this rice cooker 1000 adopts all the technical solutions of the above embodiments, it at least has all the beneficial effects brought by the technical solutions of the above embodiments, and will not be elaborated one by one here. Among them, the outer pot assembly 100 is provided on the base 200; the inner pot is provided inside the outer pot 20 of the outer pot assembly 100.

[0110] In this embodiment, a pot lid is fitted and installed on the top of the outer pot 20, and the pot lid is used to open or close the inner pot cavity.

[0111] Please refer to Figure 6 , in an embodiment of the present utility model, the base 200 is provided with a water baffle 210, and the water baffle 210 is arranged between the energized terminal 122 of the electric heating tube 12 and the inlet section 131 and the outlet section 132 of the water guide tube 13. That is, the energized terminal 122 is located on one side of the water baffle 210, and the inlet section 131 and the outlet section 132 are located on the other side of the water baffle 210.

[0112] With such a setting, the design of the water baffle 210 can effectively isolate the inlet section 131 and the outlet section 132 of the water guide tube 13 from the charged area (the first area S1) where the energized terminal 122 is provided, and further effectively isolate the adapter pipe 13a and the hose from the charged area (the first area S1), which can improve the effect of water and electricity separation.

[0113] In actual application, the water baffle 210 can be correspondingly arranged with the second area S2, or can be correspondingly arranged at the connection of the first area S1 and the second area S2, as long as it can effectively isolate the inlet section 131 and the outlet section 132 of the water guide tube 13 from the charged area (the first area S1), and no specific limitation is made here.

[0114] The above is only an exemplary embodiment of the present utility model, and does not limit the patent scope of the present utility model. Any equivalent structural transformation made under the technical concept of the present utility model by using the content of the specification and drawings of the present utility model, or directly / indirectly applied to other related technical fields, is included in the patent protection scope of the present utility model.

Claims

1. A heating plate structure, characterized in that, Comprising: A heating plate having a virtual plane passing through its center and perpendicular to the plate surface, and the virtual plane divides the heating plate into a first region and a second region; An electric heating tube embedded in the heating plate, and the energized terminals of the electric heating tube are located in the first region; A water guide pipe embedded in the heating plate, and the inlet section and the outlet section of the water guide pipe are located in the second region; the heat generated by the electric heating tube can be transferred to the water guide pipe so that the water flowing through the water guide pipe is heated to generate steam.

2. The heating plate structure according to claim 1, wherein, The first region has a first end that is the farthest from the second region, and the second region has a second end that is the farthest from the first region; The energized terminals of the electric heating tube are arranged at the first end, and the inlet section and the outlet section of the water guide pipe are arranged at the second end; Alternatively, the shortest distance from the energized terminal to the virtual plane is not less than 1 / 2 of the radius of the heating plate, and the shortest distances from the inlet section and the outlet section to the virtual plane are both not less than 1 / 2 of the radius of the heating plate.

3. The heating plate structure according to claim 1, wherein Both the inlet section and the outlet section of the water guide pipe are provided with adapter pipes, and the openings of the adapter pipes do not point to the first region.

4. The heating plate structure according to claim 3, characterized in that The opening direction of the adapter pipe provided at the inlet section is different from the opening direction of the adapter pipe provided at the outlet section.

5. The heating plate structure according to claim 4, wherein The opening of the adapter pipe provided at the inlet section faces away from the direction of the first region.

6. The heating plate structure according to claim 3, wherein, The opening of the adapter pipe is horizontally arranged or inclined downward.

7. The heating plate structure according to any one of claims 1 to 6, characterized in that, The water guide pipe includes an inlet section, an outlet section and a steam generating section, and both the inlet section and the outlet section are connected to both ends of the steam generating section through bent sections; And / or, the power of the electric heating tube is 800W - 2500W; And / or, the distance L between the water guide pipe and the electric heating tube is L≤20mm.

8. The heating plate structure according to any one of claims 1 to 6, characterized in that, The water guide pipe includes an inlet section, an outlet section and a steam generating section, the inlet section and the outlet section are respectively communicated with both ends of the steam generating section, and the pipe sections of the electric heating tube near the two energized terminals overlap in the circumferential direction to form a strong heating area, and in the radial direction of the heating plate, the steam generating section overlaps with the strong heating area.

9. An outer pot assembly, characterized in that, Comprising: An outer pot; The heating plate structure according to any one of claims 1 to 8, provided in the outer pot.

10. The outer pot assembly according to claim 9, characterized in that, The outer pot is provided with a first through hole, and both the inlet section and the outlet section of the water guide pipe extend out of the outer pot through the first through hole; And / or, the outer pot is provided with a second through hole, and the energized terminals of the electric heating tube extend out of the outer pot through the second through hole.

11. An electric rice cooker, characterized in that, Comprising: A base; The outer pot assembly according to claim 9 or 10, provided on the base; An inner pot, provided in the outer pot of the outer pot assembly.

12. The rice cooker according to claim 11, wherein, The base is provided with a water baffle, and the water baffle is arranged between the energized terminals of the electric heating tube and the inlet section and the outlet section of the water guide pipe.

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