Steam rice cooker

Abstract

The utility model discloses a steam rice cooker, and relates to the technical field of cooking utensils, the steam rice cooker comprises a cooker body assembly, a cover body assembly, a steam generation assembly and a water supply assembly, the cooker body assembly is internally provided with a cooking cavity; the cover body assembly covers the cooker body assembly in an openable and closable manner; the steam generation assembly comprises a composite hot plate and a steam output pipeline, the composite hot plate comprises a heating plate, an electric heating pipe and a water guide pipe, the electric heating pipe and the water guide pipe are embedded in the heating plate, the heating plate is located below the cooking cavity, and heat generated by the electric heating pipe can be transmitted to the bottom wall of the cooking cavity and the water guide pipe through the heating plate. The steam output pipeline is communicated between the air outlet of the water guide pipe and the cooking cavity; the water supply assembly comprises a water tank and a water supply pipeline, two ends of the water supply pipeline are respectively communicated with a water outlet of the water tank and a water inlet of the aqueduct, at least part of the water tank is higher than the water supply pipeline and the water inlet, and the water supply pipeline is provided with a non-return structure. According to the technical scheme, the performance reliability of the steam rice cooker can be improved.

Description

Technical Field

[0001] This utility model relates to the field of cooking appliances, and in particular to a steam rice cooker. Background Technology

[0002] A steam rice cooker is a cooking appliance that uses high-temperature steam to heat or assist in cooking food by introducing it into the cooking cavity. In related technologies, steam rice cookers typically use a water pump to introduce water into the heating element, heating the water to generate steam, which is then introduced into the cooking cavity. However, water pumps are not very reliable, have a relatively short lifespan, and cannot sustain the long-term use of a steam rice cooker. Furthermore, they generate significant noise during water pumping, affecting the user experience. Utility Model Content

[0003] The main purpose of this invention is to provide a steam rice cooker that improves the performance and reliability of steam rice cookers.

[0004] To achieve the above objectives, the present invention provides a steam rice cooker comprising:

[0005] A pot body assembly, wherein the pot body assembly is provided with a cooking cavity;

[0006] A lid assembly, which can be opened and closed, is provided on the pot body assembly;

[0007] A steam generating assembly includes a composite heating plate and a steam output pipe. The composite heating plate includes a heating element, an electric heating tube, and a water pipe. The electric heating tube and the water pipe are embedded in the heating plate, which is located below the cooking cavity. The heat generated by the electric heating tube can be transferred to the bottom wall of the cooking cavity through the heating plate, and the heat generated by the electric heating tube can be transferred to the water pipe through the heating plate to heat the water flowing through the water pipe and form steam. The steam output pipe connects the steam outlet of the water pipe to the cooking cavity.

[0008] A water supply assembly includes a water tank and a water supply pipeline. The two ends of the water supply pipeline are connected to the outlet of the water tank and the inlet of the water guide pipe, respectively. At least part of the water tank is higher than the water supply pipeline and the water guide pipe. The water supply pipeline is equipped with a check valve structure.

[0009] In one embodiment, the check valve is configured as a one-way valve.

[0010] In one embodiment, the opening pressure Pc of the one-way valve satisfies the condition that Pc ≤ 5 kPa;

[0011] And / or, along the length of the water supply pipeline, the distance L between the one-way valve and the inlet of the water guide pipe satisfies L≤500mm.

[0012] In one embodiment, the water supply assembly further includes an on / off valve, which is disposed in the water supply pipeline and located between the one-way valve and the outlet of the water tank.

[0013] In one embodiment, the water tank is disposed on the cover assembly, and the water supply pipeline is equipped with an on / off valve;

[0014] Alternatively, the water tank may be located within the cooker assembly.

[0015] In one embodiment, the pot body assembly has an installation space, and the steam output pipeline includes a first pipeline and a second pipeline. The first pipeline is located in the pot body assembly and is connected to the water guide pipe. The second pipeline is located in the lid assembly, and the steam outlet of the second pipeline is exposed on the upper surface of the lid assembly facing the cooking cavity for communication with the cooking cavity.

[0016] The first pipe and the second pipe are connected at least when the steam rice cooker is in the closed position.

[0017] In one embodiment, the surface of the pot body assembly facing the lid assembly is provided with a first docking structure communicating with the first pipeline, and the surface of the lid assembly facing the pot body assembly is provided with a second docking structure communicating with the second pipeline;

[0018] When the steam rice cooker is in the closed position, the first docking structure and the second docking structure are connected.

[0019] In one embodiment, the steam output pipe is arranged from the hinge position between the lid assembly and the pot body assembly, and at least a portion of the steam output pipe is located on the lid assembly. The steam outlet of the steam output pipe is exposed on the upper surface of the lid assembly facing the cooking cavity for communication with the cooking cavity.

[0020] In one embodiment, the pot body assembly includes a pot body and a pan body, the pan body being removably disposed within the pot body, and the pan body having the cooking cavity;

[0021] The composite heating plate is located below the pot body and is in contact with the pot body.

[0022] In one embodiment, the steam rice cooker is further provided with a first temperature sensor, which is located below the cooking cavity;

[0023] And / or, the steam rice cooker is further provided with a second temperature sensor, which is located on the lid assembly.

[0024] The technical solution of this utility model involves a water tank in the steam rice cooker for supplying water to the steam generating component. At least part of the water tank is positioned above the water supply pipe and the water guide pipe of the steam generating component, allowing water in the tank to flow into the water supply pipe and water guide pipe by gravity. This eliminates the need for a water pump or other power source in the water supply component, preventing the steam rice cooker from becoming unusable due to power source failure, improving the performance and reliability of the steam rice cooker, and also reducing noise generated by the water supply component when supplying water to the composite heating plate. Simultaneously, a check valve structure is installed in the water supply pipe to prevent steam from flowing from the composite heating plate back into the water tank, allowing more steam to be introduced into the cooking cavity along the steam output pipe, improving steam utilization efficiency. Furthermore, the heat generated by the composite heating plate can also be transferred to the bottom wall of the cooking cavity for heating, eliminating the need for an additional heating structure for heating the cooking cavity separately, thus simplifying the structure of the steam rice cooker. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art 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.

[0026] Figure 1 A structural diagram of an embodiment of the steam rice cooker provided by this utility model;

[0027] Figure 2 for Figure 1 A picture of a steam rice cooker with the lid open;

[0028] Figure 3 This is a connection diagram of an embodiment of the steam rice cooker provided by this utility model;

[0029] Figure 4 This is a partial structural cross-sectional view of an embodiment of the steam rice cooker of this utility model;

[0030] Figure 5 This is a connection diagram of another embodiment of the steam rice cooker provided by this utility model;

[0031] Figure 6 A partial structural cross-sectional view of yet another embodiment of the steam rice cooker provided by this utility model;

[0032] Figure 7 A partial structural cross-sectional view of another embodiment of the steam rice cooker provided by this utility model;

[0033] Figure 8A structural diagram of an embodiment of the composite heating plate in a steam rice cooker provided by this utility model;

[0034] Figure 9 This is a structural diagram showing the removal of the heating plate in an embodiment of the composite heating plate in the steam rice cooker provided by this utility model.

[0035] Explanation of icon numbers:

[0036] 100. Steam Rice Cooker; 1. Cooker Body Assembly; 11. Cooker Body; 12. Pot Body; 121. Cooking Chamber; 13. First Connecting Structure; 2. Lid Assembly; 21. Second Connecting Structure; 22. Sealing Ring; 3. Steam Generating Assembly; 31. Composite Heating Plate; 311. Water Guide Pipe; 312. Electric Heating Element; 313. Heating Plate; 32. Steam Output Pipeline; 321. Steam Outlet; 322. Nozzle; 4. Water Supply Assembly; 41. Water Tank; 411. Water Outlet; 42. Water Supply Pipeline; 43. Check Structure; 44. On / Off Valve; 5. First Temperature Sensor; 6. Second Temperature Sensor.

[0037] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, 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. Additionally, 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 simultaneously. 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 impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0041] A steam rice cooker is a cooking appliance that uses high-temperature steam to heat or assist in cooking food by introducing it into the cooking cavity. In related technologies, steam rice cookers typically use a water pump to introduce water into the heating element, heating the water to generate steam, which is then introduced into the cooking cavity. However, water pumps are not very reliable, have a relatively short lifespan, and cannot sustain the long-term use of a steam rice cooker. Furthermore, they generate significant noise during water pumping, affecting the user experience.

[0042] To address the aforementioned issues, this utility model proposes a steam rice cooker 100, which can improve the performance and reliability of the steam rice cooker 100.

[0043] Please see Figures 1 to 3 In one embodiment of this utility model, the steam rice cooker 100 includes a cooker body assembly 1, a lid assembly 2, a steam generating assembly 3, and a water supply assembly 4. The cooker body assembly 1 has a cooking cavity 121 inside; the lid assembly 2 is closable and covers the cooker body assembly 1. The steam generating assembly 3 includes a composite heating plate 31 and a steam output pipe 32. The composite heating plate 31 includes a heating plate 313, an electric heating element 312, and a water pipe 311. The electric heating element 312 and the water pipe 311 are embedded in the heating plate 313, which is located below the cooking cavity. The heat generated by the electric heating element 312 can be transferred to the bottom wall of the cooking cavity 121 through the heating plate 313, and the heat generated by the electric heating element 312 can be transferred to the water pipe 311 through the heating plate 313, so that the water flowing through the water pipe 311 is heated to form steam. The steam output pipe 32 connects the steam outlet of the water pipe 311 to the cooking cavity 121. The water supply assembly includes a water tank 41 and a water supply pipe 42. The two ends of the water supply pipe 42 are connected to the water outlet 411 of the water tank 41 and the water inlet of the water guide pipe 311, respectively. At least part of the water tank 41 is higher than the water supply pipe 42 and the water guide pipe 311. The water supply pipe 42 is provided with a check valve structure 43.

[0044] Specifically, the pot body assembly 1 has a cooking cavity 121 with an opening at the top; the lid assembly 2 is closable relative to the pot body assembly 1 to open or close the cooking cavity 121. Optionally, the lid assembly 2 can be rotatably connected to the pot body assembly 1 to open or close the cooking cavity 121 by flipping it relative to the pot body assembly 1; the lid assembly 2 can also be detachably connected to the pot body assembly 1 so that the lid assembly 2 can be separated from the pot body assembly 1 to open the cooking cavity 121.

[0045] The steam generating component 3 can be installed on the pot body component 1, on the lid component 2, or independently of the pot body component 1 and the lid component 2. The steam generating component 3 includes a connected composite heating plate 31 and a steam output pipe 32.

[0046] Combined with reference Figure 8 and Figure 9 The composite heating plate 31 includes a heating plate 313, a water pipe 311 disposed on the heating plate 313, and an electric heating element 312. The heating plate 313 can be a circular disc, a square disc, or other shapes, with an internal cavity for mounting the electric heating element 312, the water pipe 311, and other structures. To ensure the structural strength, high-temperature resistance, and thermal conductivity of the heating plate 313, it can be made of sheet metal. In practical applications, the heating plate 313 can be a one-piece structure or a split structure consisting of two, three, or other structural components. Of course, to facilitate the installation of the electric heating element 312, the water pipe 311, and other structures, the heating plate 313 is preferably a split structure consisting of two upper and lower covers.

[0047] The inlet of the water pipe 311 is connected to the water supply assembly 4, and the outlet of the water pipe 311 is connected to the steam output pipe 32. The electric heating element 312 is used to heat the water pipe 311, so that the water in the water pipe 311 is heated to form hot water, thereby generating steam. The heat generated by the electric heating element 312 can be transferred to the bottom wall of the cooking cavity 121 through the heating plate 313, thereby heating the cooking cavity 121; alternatively, the electric heating element 312 can be made to contact the bottom wall of the cooking cavity 121 to directly transfer heat to the cooking cavity 121.

[0048] The steam output pipe 32 is used to communicate with the cooking cavity 121 so that the steam generated in the composite heating plate 31 can be discharged through the steam output pipe 32 and flow into the cooking cavity 121. Optionally, the outlet of the steam output pipe 32 can be located on the pot body assembly 1. Alternatively, at least a portion of the structure of the steam output pipe 32 can be located on the lid assembly 2. When the lid assembly 2 is closed to the pot body assembly 1 to seal the cooking cavity 121, the steam output pipe 32 communicates with the cooking cavity 121, eliminating the need for an additional opening on the pot body assembly 1 for the steam output pipe 32 to communicate, thus simplifying the structural design. Optionally, a nozzle 322 can be provided at the steam outlet end of the steam output pipe 32, and the steam outlet 321 can be located on the nozzle 322. In addition, two, three, or more steam outlets 321 can be provided on the nozzle 322, which is not limited here.

[0049] It should be noted that when the steam rice cooker 100 is used, high-temperature steam can be introduced into the cooking cavity 121 through the steam generating component 3 to heat the food in the cooking cavity 121; in some embodiments, the steam generating component 3 can also be used as an auxiliary cooking device, for example, it can be used as a bubble breaking device to break the bubbles generated in the cooking cavity 121 with steam.

[0050] In this embodiment, the steam rice cooker 100 further includes a water supply component for supplying water to the steam generating component 3; the water supply component is provided with a water tank 41 for storing water and a water supply pipe 42 for connecting the water tank 41 and the steam generating component 3; the water tank 41 allows the steam rice cooker 100 to operate without relying on an external water source, improving ease of use. The water outlet 411 of the water tank 41 can be located on the side wall or the bottom wall of the water tank 41, typically positioned near the bottom wall of the water tank 41, so that all water in the water tank 41 can be discharged, preventing water below the outlet 411 from remaining in the water tank 41. In this design, at least a portion of the structure of the water tank 41 is positioned above the water supply pipe 42 and the water guide pipe 311, and the outlet of the water tank 41 is located on the side or bottom of the water tank 41. The water level in the water tank 41 is higher than the outlet of the water tank 41 and the water supply pipe 42 and the water guide pipe 311, so that the water in the water tank 41 can flow into the water supply pipe 42 and into the water guide pipe 311 by its own gravity. Optionally, the water tank 41 can be positioned higher than the water supply pipe 42 and the water guide pipe 311 as a whole, or the water supply pipe 42 and the water guide pipe 311 can be positioned higher than the bottom of the water tank 41 and lower than the outlet of the water tank 41, or the water supply pipe 42 and the water guide pipe 311 can be positioned higher than the outlet of the water tank 41 and lower than the highest water level in the water tank 41. This setup eliminates the need for a power source such as a water pump in the water supply component, thus preventing the steam rice cooker 100 from malfunctioning due to power source damage or failure. This improves the performance and reliability of the steam rice cooker 100 and also avoids excessive noise generated by the water supply component when supplying water to the composite heating plate 31.

[0051] In addition, a check structure 43 is provided in the water supply assembly. The check structure 43 is located on the water supply pipeline 42 to prevent steam in the steam generating assembly 3 from flowing from the water supply pipeline 42 to the water tank 41, thus avoiding affecting the steam utilization rate. Optionally, the check structure 43 can be a one-way valve. The one-way valve has a certain opening pressure. When the difference between the inlet pressure and the outlet pressure exceeds the opening pressure, the one-way valve is open, and the water in the water tank 41 can flow through the one-way valve to the guide pipe 311. If the pressure of the steam flowing from the guide pipe 311 to the one-way valve is higher than the pressure of the water flow at the inlet of the one-way valve, the valve core of the one-way valve will close under the action of the steam pressure, and the steam will not be able to flow through the one-way valve into the water tank 41. After the check valve is shut off, steam can only flow to the steam output pipe 32. As steam is discharged from the steam output pipe 32, the steam pressure on the water pipe 311 and the outlet side of the check valve gradually decreases. When the steam pressure is less than the water pressure at the inlet of the check valve, and the pressure difference between the inlet and outlet of the check valve reaches the opening pressure, the check valve will reopen, allowing water to enter the water pipe 311 and be heated to form steam. This process repeats, and the water supply component can intermittently supply water to the steam generating component 3. The steam generating component 3 also intermittently introduces steam into the cooking chamber 121, thereby heating the food in the cooking chamber 121.

[0052] Alternatively, a solenoid valve or other on / off valve 44 can be set as a check valve 43, and the conduction state of the on / off valve 44 can be controlled electronically. When the on / off valve 44 is closed, neither the water in the water tank 41 nor the steam in the water pipe 311 can pass through the on / off valve 44. This setting can meet the usage requirements of the steam rice cooker 100 by controlling the on / off frequency of the on / off valve 44, and avoid steam backflow. Specifically, the on / off valve 44 is first controlled to be in the open state, so that the water in the water tank 41 flows into the water pipe 311 of the steam generating component 3 and is heated to generate steam. When the steam in the water pipe 311 reaches a certain level, the on / off valve 44 is closed, for example, when the steam pressure reaches the water pressure of the water supply pipe 42, to prevent the steam from returning the water in the water supply pipe 42 to the water tank 41 and causing steam to also flow into the water tank 41.

[0053] In this configuration, when using steam to break bubbles, the frequency of steam discharge can be controlled by selecting a one-way valve with an appropriate opening pressure or by controlling the opening and closing frequency of the on / off valve 44, thus achieving the effect of intermittent steam discharge. Steam can be discharged to break bubbles when bubbles are generated in the cooking cavity 121, and steam discharge can be stopped after the bubbles are destroyed, thereby avoiding the waste of a large amount of steam.

[0054] In some implementations, both the on / off valve 44 and the check valve may be provided simultaneously. For specific implementations, please refer to the embodiments below, which will not be repeated here.

[0055] In other words, the technical solution of this utility model includes a water tank 41 for storing water in the steam generating assembly 3, which is connected to a water pipe 311 for heating water to generate steam via a water supply pipe 42. At least part of the water tank 41 is positioned above the water supply pipe 42 and the water pipe 311, allowing water in the water tank 41 to flow into the water supply pipe 42 and the water pipe 311 by its own gravity. This eliminates the need for a power source such as a water pump in the water supply assembly, thus avoiding the problem of the steam rice cooker 100 becoming unusable due to power source failure, improving the performance reliability of the steam rice cooker 100, and also preventing excessive noise from the water supply assembly when supplying water to the composite heating plate 31. Simultaneously, a check valve structure 43 is provided on the water supply pipe 42 to prevent steam in the composite heating plate 31 from flowing into the water tank 41, allowing more steam to be introduced into the cooking cavity 121 along the steam output pipe 32, improving steam utilization efficiency. In addition, the heat generated by the composite heating plate 31 can also be transferred to the bottom wall of the cooking cavity 121 to heat the cooking cavity 121, so that there is no need to set up an additional heating structure to heat the cooking cavity 121 separately, which can simplify the structure of the steam rice cooker 100. When cooking by injecting steam into the cooking cavity 121, the top of the cooking cavity 121 is heated by steam and the bottom is heated by the electric heating tube 312, so that the food in the cooking cavity 121 is heated evenly.

[0056] Please see Figure 3 and Figure 4 In one embodiment, the check structure 43 is configured as a one-way valve.

[0057] In this embodiment, a check valve is installed on the water supply pipeline 42 as a check structure 43. The check valve can be, but is not limited to, a spring check valve or a diaphragm check valve. In a spring check valve, a spring supports the valve core. In a diaphragm check valve, a diaphragm is used as the valve core, and the check valve is opened by deforming the diaphragm. Due to the force of the spring on the valve core or the elastic force of the diaphragm itself, as well as the outlet air pressure of the check valve, the check valve has a certain opening pressure. When the difference between the inlet pressure and the outlet pressure of the check valve exceeds the opening pressure, the check valve is open. At this time, the water in the water tank 41 can flow through the check valve to the guide pipe 311. If the pressure of the steam flowing from the guide pipe 311 to the check valve is higher than the pressure of the water flow at the inlet of the check valve, the valve core of the check valve will close the internal passage of the check valve under the action of the steam pressure. The steam cannot flow through the check valve into the water tank 41, thus timely cutting off the steam and preventing the steam from flowing through the check valve into the water tank 41. After the check valve closes, steam can only flow to the steam output pipe 32. As steam is discharged from the steam output pipe 32, the steam pressure on the water pipe 311 and the check valve outlet side gradually decreases. When the steam pressure is less than the water pressure at the check valve inlet, and the pressure difference between the check valve inlet and outlet reaches the opening pressure, the check valve will reopen, allowing water to enter the water pipe 311 and be heated to form steam. This process repeats, allowing the water supply assembly to intermittently supply water to the steam generating assembly 3, and the steam generating assembly 3 to intermittently introduce steam into the cooking chamber 121, thereby heating the food in the cooking chamber 121. Using a check valve as the check structure 43 reduces the control difficulty and improves ease of use compared to using a solenoid valve to control the on / off state.

[0058] In one embodiment, the opening pressure Pc of the check valve satisfies the condition that Pc ≤ 5 kPa.

[0059] In this embodiment, a check valve with an opening pressure Pc ≤ 5 kPa is selected as the check structure 43. The check valve can be any check valve with an opening pressure of 5 kPa, 4 kPa, 3 kPa, 2 kPa, 1 kPa, or an opening pressure not exceeding 5 kPa. This setting can avoid the check valve opening pressure being too high, which would require a large water flow to open the check valve. This avoids the problem that the water pressure cannot reach the opening pressure and thus cannot open the check valve when relying on the gravity of water for water supply, or the problem that the water pressure is too low and the amount of water passing through the check valve is insufficient to meet the required amount of steam.

[0060] In one embodiment, along the length of the water supply pipeline 42, the distance L between the one-way valve and the inlet of the water guide pipe 311 satisfies the condition that L≤500mm.

[0061] In this embodiment, the distance L between the check valve and the water inlet does not exceed 500mm. The check valve can be positioned at the water inlet, i.e., the outlet of the water supply pipe 42, or at any location within 500mm, 400mm, 300mm, 200mm, 100mm, 50mm, or 30mm of the water inlet, or within 500mm of the water inlet of the guide pipe 311. This arrangement avoids the check valve being too far from the water inlet of the guide pipe 311, thus preventing steam backflow and a longer time interval for the check valve to close, reducing the time interval for steam reciprocating, and increasing the frequency of steam ejection.

[0062] Please see Figures 5 to 7 In one embodiment, the water supply assembly further includes an on / off valve 44, which is located in the water supply pipeline 42 and between the check valve and the outlet 411 of the water tank 41.

[0063] In this embodiment, the on / off valve 44 can be configured as a solenoid valve. By controlling the opening and closing of the water supply pipe 42, the valve can actively control whether water flows through the water supply pipe 42 to the steam generating component 3. Thus, the frequency of steam generation and emission can be controlled by the opening and closing frequency of the on / off valve 44. Alternatively, it can actively prevent water from flowing to the steam generating component 3 when steam generation is not required. In some embodiments, when the outlet 411 of the water tank 41 is higher than the steam outlet 321 of the steam output pipe 32, for example, when the water tank 41 is located in the cover assembly 2, the water supply pipe 42 can be shut off by the on / off valve 44, which can also prevent water in the water tank 41 from flowing directly into the cooking cavity 121. Optionally, the amount of water flowing into the water guide pipe 311 can also be controlled by controlling the opening degree of the on / off valve 44.

[0064] In one embodiment, a water tank 41 is provided on the cover assembly 2, and a water supply pipeline 42 is provided with an on / off valve 44.

[0065] In this embodiment, the water tank 41 of the water supply component is disposed on the cover assembly 2. It can be disposed inside the cover assembly 2, or disposed outside the cover assembly 2 and connected to it. Alternatively, part of the structure of the water tank 41 can be embedded in the cover assembly 2, while another part of the structure is exposed outside the cover assembly 2. The steam generating component 3 can be disposed on the cover assembly 2, on the pot assembly 1, or independently on the outside of both the cover assembly 2 and the pot assembly 1. It is only necessary that the water outlet 411 of the water tank 41 is higher than the water supply pipe 42 and the water guide pipe 311 of the composite heating plate 31. At the same time, since the water tank 41 is higher than the cooking cavity 121, an on / off valve 44 is provided on the water supply pipe 42 to prevent water in the water tank 41 from flowing directly into the cooking cavity 121 when no steam is generated. Optionally, the water tank 41 is detachably connected to the cover assembly 2, which facilitates the removal of the water tank 41 for adding water or emptying the remaining water in the water tank 41, for cleaning or replacing the water tank 41.

[0066] When the composite heating plate 31 is located inside the cooker body assembly 1, the water supply pipe 42 can extend to the inside of the cooker body assembly 1 and connect to the composite heating plate 31. Alternatively, the inlet of the water guide pipe 311 can be exposed on the surface of the cooker body assembly 1 to connect to the water supply pipe 42. In addition, the water supply pipe 42 can include a first guide section located on the lid assembly 2 and a second guide section located on the cooker body assembly 1. The first guide section and the second guide section are connected to each other when the steam rice cooker 100 is closed and disconnected when the steam rice cooker 100 is opened. The on / off valve 44 is located in the first guide section and the one-way valve is located in the second guide section to prevent water in the water tank 41 from flowing out of the outlet of the first guide section when the lid is opened, and to prevent steam in the water guide pipe 311 from spraying out of the inlet of the second guide section.

[0067] Please see Figure 1 and Figure 2 In one embodiment, a water tank 41 is provided on the pot body assembly 1.

[0068] In this embodiment, the water tank 41 can be located inside the cooker body assembly 1, connected to the side of the cooker body assembly 1, or integrally formed into the cooker body assembly 1. This arrangement allows the water supply assembly 4 to be connected to the cooker body assembly 1 to form an integrated structure, which is more convenient for transporting and handling the steam rice cooker 100 as a whole compared to separating the water tank 41 from the cooker body assembly 1. Optionally, the water tank 41 can be detachably connected to the cooker body assembly 1, making it easy to remove the water tank 41 to add water or pour out the remaining water in the water tank 41, and to clean or replace the water tank 41.

[0069] In one embodiment, the water tank 41 is set independently of the pot body assembly 1 and the lid assembly 2. This arrangement allows for flexible placement of the water tank 41 and facilitates the removal of the water tank 41 for adding or emptying water, cleaning, or replacing the water tank 41.

[0070] In one embodiment, at least a portion of the steam output pipe 32 is provided on the cover assembly 2, and the steam outlet 321 of the steam output pipe 32 is exposed on the surface of the cover assembly 2 facing the cooking cavity 121 for communication with the cooking cavity 121.

[0071] In this configuration, when the lid assembly 2 is closed onto the pot body assembly 1 to seal the cooking cavity 121, the steam outlet 321 of the steam output pipe 32 faces the cooking cavity 121. This eliminates the need for an additional opening on the pot body assembly 1 for the steam output pipe 32 to connect to, simplifying the structural design. Optionally, a nozzle 322 can be provided at the steam outlet end of the steam output pipe 32, with the steam outlet 321 positioned on the nozzle 322. Furthermore, the nozzle 322 can have two, three, or more steam outlets 321; this is not limited here.

[0072] Optionally, the steam output pipe 32 can be located on the lid assembly 2 by entirely mounting the steam generating assembly 3 on the lid assembly 2. Alternatively, a first pipe and a second pipe can be provided that are interconnected. The first pipe is connected to the water pipe 311, and the second pipe is located on the lid assembly 2, with the steam outlet 321 of the second pipe exposed on the surface of the lid assembly 2 facing the cooking cavity 121. The first pipe can be located inside the pot body assembly 1 or on the outside of both the pot body assembly 1 and the lid assembly 2.

[0073] In one embodiment, the steam output pipe 32 includes a first pipe and a second pipe. The first pipe is located on the cooker body assembly 1 and is connected to the water pipe 311. The second pipe is located on the lid assembly 2. The steam outlet 321 of the second pipe is exposed on the surface of the lid assembly 2 facing the cooking cavity 121. The first pipe and the second pipe are connected at least when the steam rice cooker 100 is in the closed state, and the steam outlet 321 is arranged opposite to the cooking cavity 121.

[0074] In this embodiment, the pot body assembly 1 has an installation space, allowing it to include a pot body 11 and a pot body 12. The pot body 11 contains the installation space, and the pot body 12 is located within it, including a cooking cavity 121. The steam output pipe 32 includes a first pipe and a second pipe that are interconnected. At least a portion of the first pipe is located within the installation space, where the composite heating plate 31 can be located either within or outside the installation space. The second pipe is located on the lid assembly 2, with its outlet 321 exposed on the surface of the lid assembly 2 facing the cooking cavity 121. When the lid assembly 2 is closed onto the pot body assembly 1 to seal the cooking cavity 121, the outlet 321 faces the cooking cavity 121, allowing steam generated by the composite heating plate 31 to be injected into the cooking cavity 121 through the outlet 321.

[0075] Optionally, the first and second pipes can always be connected, or the first and second pipes can be detachably connected. For example, in the embodiments below, the conduction state of the first and second pipes can be controlled simultaneously by the opening and closing cover assembly 2, which is not limited here.

[0076] Please see Figure 2 In one embodiment, the surface of the cooker body assembly 1 facing the lid assembly 2 is provided with a first docking structure 13 that communicates with the first pipeline, and the surface of the lid assembly 2 facing the cooker body assembly 1 is provided with a second docking structure 21 that communicates with the air inlet of the second pipeline; when the steam rice cooker 100 is in the closed state, the first docking structure 13 and the second docking structure 21 are connected.

[0077] In this embodiment, the first pipe of the steam output pipe 32 is disposed inside the pot body 11, and one end of the first pipe is connected to the first docking structure 13, with at least a portion of the first docking structure 13 exposed on the surface of the pot body assembly 1 facing the lid assembly 2. The first docking structure 13 can be a communication port formed on the surface of the pot body assembly 1, or it can be a connecting structure such as a connector, or a valve body structure such as a one-way valve. Furthermore, a second docking structure 21 connected to the second pipe is disposed in the lid assembly 2, and at least a portion of the second docking structure 21 is exposed on the surface of the lid assembly 2 facing the pot body assembly 1. When the lid assembly 2 is closed onto the pot body assembly 1, the first docking structure 13 and the second docking structure 21 are interconnected. The second docking structure 21 can be a through port on the surface of the lid assembly 2, or it can be a plug-in connector that can be inserted into the first docking structure 13.

[0078] In one embodiment, the first docking structure 13 includes a valve seat and a valve core. The valve seat has a valve cavity communicating with the first pipeline. The valve seat has a docking interface communicating with the valve cavity and exposed on the surface of the pot body assembly 1 facing the lid assembly 2. The valve core is movably disposed in the valve cavity to close or open the docking interface.

[0079] In this embodiment, the first docking structure 13 can be a solenoid valve, which drives the valve core to move through an electronic control, thereby closing or opening the docking interface of the valve seat. Alternatively, the first docking structure 13 can be equipped with an elastic element as in the following embodiment, which drives the valve core to move through the elastic element and the second docking structure 21, thereby closing or opening the docking interface of the valve seat. With this arrangement, when the steam rice cooker 100 is in the open state, the valve core can be driven to close the docking interface, preventing foreign objects from entering the valve cavity and the first pipeline through the docking interface. It can also prevent steam, cold water or hot water from spraying out from the first docking structure 13 when the lid is open, thus improving the safety of use.

[0080] In one embodiment, the first docking structure 13 further includes an elastic element disposed in the valve cavity and abutting against the side of the valve core away from the docking interface; the second docking structure 21 is provided with a plug-in component. When the steam rice cooker 100 is in the open state, the elastic element increases the elastic force on the valve core to close the docking interface. When the steam rice cooker 100 is in the closed state, the plug-in component holds the valve core to overcome the elastic force of the elastic element, so that the docking interface is opened and communicates with the valve cavity.

[0081] In this embodiment, the first docking structure 13 is a purely mechanical structure. The valve cavity of the valve seat has a top wall and a bottom wall that are opposite to each other in the direction of valve core movement. The top wall has a docking interface, and the bottom wall has a through hole for connection with the first pipeline. The elastic element can be a spring, which is located between the valve core and the bottom wall of the valve cavity. When the steam rice cooker 100 is in the open state, the elastic element pushes the valve core so that the valve core holds the top wall of the valve cavity to close the docking interface. The second docking structure 21 provided on the cover assembly 2 is provided with a plug-in component. The second docking structure 21 is provided with a flow channel communicating with the guide channel. The side wall of the plug-in component is provided with a guide port communicating with the flow channel. When the steam rice cooker 100 is in the open state, the plug-in component of the second docking structure 21 pushes the valve core so that the valve core moves away from the docking interface, and part of the plug-in component is inserted into the valve cavity. At this time, the valve cavity and the flow channel of the second docking structure 21 are connected through the guide port.

[0082] In one embodiment, the lid assembly 2 further includes a sealing ring 22, which surrounds the second mating structure 21. When the steam rice cooker 100 is in the closed state, the sealing ring 22 abuts against the surface of the cooker body 11. This arrangement can improve the sealing performance at the connection between the first mating structure 13 and the second mating structure 21, avoiding problems such as steam leakage or water leakage.

[0083] In one embodiment, a steam output pipe 32 is arranged from the hinge position between the lid assembly 2 and the pot assembly 1. At least a portion of the steam output pipe 32 is provided on the lid assembly 2. The steam outlet 321 of the steam output pipe 32 is exposed on the surface of the lid assembly 2 facing the pot assembly 1 and is used to communicate with the cooking cavity 121.

[0084] In this embodiment, at least a portion of the steam output pipe 32 is disposed on the lid assembly 2, and the steam outlet 321 of the steam output pipe 32 is exposed on the surface of the lid assembly 2 facing the pot body assembly 1, for communication with the cooking cavity 121. With this arrangement, when the lid assembly 2 is closed onto the pot body assembly 1 to seal the cooking cavity 121, the steam outlet 321 of the steam output pipe 32 faces the cooking cavity 121, eliminating the need for an additional opening on the pot body assembly 1 for the steam output pipe 32 to communicate with, thus simplifying the structural design. Optionally, a nozzle 322 can be disposed at the steam outlet end of the steam output pipe 32, and the steam outlet 321 can be disposed on the nozzle 322. Furthermore, two, three, or more steam outlets 321 can be disposed on the nozzle 322; this is not limited here.

[0085] The steam output pipe 32 is arranged to pass through the hinge position between the cover assembly 2 and the pot body assembly 1, and the steam output pipe 32 can be bent and deformed as the cover assembly 2 is opened and closed to ensure that the steam output pipe 32 is always in a conductive state.

[0086] Please see Figure 2 In one embodiment, the pot body assembly 1 includes a pot body 11 and a pot body 12. The pot body 12 is detachably disposed inside the pot body 11 and has a cooking cavity 121.

[0087] In this embodiment, the pot body assembly 1 includes a pot body 11 and a pot body 12, with the pot body 12 disposed in the installation space provided in the pot body 11. Optionally, the pot body 12 is detachably connected to the pot body 11 so that the pot body 12 can be removed for cleaning. The installation space of the pot body 11 can also be used to install a heating structure for heating the pot body 12, as well as control devices such as a control module.

[0088] Please see Figure 3 and Figure 5 In one embodiment, the composite heating plate 31 is located below the pot body 12. This arrangement ensures that the water guide pipe 311 of the composite heating plate 31 is at a relatively low height, guaranteeing that the water outlet 411 of the water tank 41 is higher than the water guide pipe 311, allowing water in the water tank 41 to flow into the water guide pipe 311 by its own gravity. Furthermore, by placing the composite heating plate 31 below the pot body 12 and ensuring it is in contact with the pot body 12, the heat generated by the composite heating plate 31 can be transferred to the pot body for heating, improving the utilization rate of the heat generated by the heating element 312. Additionally, the food in the cooking cavity 121 can be simultaneously heated by the steam injected from the opening of the cooking cavity 121 and by the heating element 312 below, improving heating efficiency and ensuring even heating of the food.

[0089] Please see Figure 3 and Figure 5 In one embodiment, the composite heating plate 31 contacts the pot body 12 and is used to heat the pot body 12.

[0090] This configuration improves the utilization rate of heat generated by the heating element 312 in the composite heating plate 31. Optionally, it eliminates the need for other heating structures in the cooker body assembly 1 to heat the cooking cavity 121, simplifying the structure of the steam rice cooker 100. Furthermore, the composite heating plate 31 can contact the side wall of the pot body 12 for heat conduction, or it can be positioned below the pot body 12, allowing the food in the cooking cavity 121 to be simultaneously heated by steam injected from the opening of the cooking cavity 121 and by the heating element 312 below, improving heating efficiency and ensuring even heating of the food. Optionally, the heating element 312 can be used to heat the cooking cavity 121 while the steam generating assembly 3 generates steam; alternatively, when steam is not required, water can be supplied through the water pipe 311 without activating the heating element 312 to heat the food in the cooking cavity 121.

[0091] Please see Figure 3 and Figure 5 In one embodiment, the cooker body assembly 1 further includes a first temperature sensor 5, which is located below the cooking cavity 121.

[0092] In this embodiment, the steam rice cooker 100 is equipped with a first temperature sensor 5, which is located below the pot body 12 forming the cooking cavity 121. The first temperature sensor 5 can be used to detect the temperature of the cooking cavity 121, thereby determining the cooking state and stage of the steam rice cooker 100. For example, the temperature of the cooking cavity 121 can be used to determine whether the liquid in the cooking cavity 121 is boiling, thereby controlling the operating state of each component in the steam rice cooker 100 according to the cooking stage. Optionally, the composite heating plate 31 is located below the pot body 12 of the cooker body assembly 1. A clearance opening can be provided on the heating plate 313 of the composite heating plate 31, so that the first temperature sensor 5 is located at the clearance opening to accurately detect the temperature of the pot body 12.

[0093] Please see Figure 2 In one embodiment, the steam rice cooker 100 includes a second temperature sensor 6, which is disposed on the lid assembly 2.

[0094] The second temperature sensor 6 can also be used to detect the temperature in the cooking cavity 121, thereby determining the cooking state and stage of the steam rice cooker 100 and improving the control accuracy of the steam rice cooker 100. For example, the temperature of the cooking cavity 121 can be used to determine whether the liquid in the cooking cavity 121 is boiling, and the operating state of each component in the steam rice cooker 100 can be controlled according to the cooking stage. In some embodiments, a first temperature sensor 5 and a second temperature sensor 6 can be set in the steam rice cooker 100, which will not be elaborated here.

[0095] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A steam rice cooker, characterized in that, include: A pot body assembly, wherein the pot body assembly is provided with a cooking cavity; A lid assembly, which can be opened and closed, is provided on the pot body assembly; A steam generating assembly includes a composite heating plate and a steam output pipe. The composite heating plate includes a heating element, an electric heating tube, and a water pipe. The electric heating tube and the water pipe are embedded in the heating plate, which is located below the cooking cavity. The heat generated by the electric heating tube can be transferred to the bottom wall of the cooking cavity through the heating plate, and the heat generated by the electric heating tube can be transferred to the water pipe through the heating plate to heat the water flowing through the water pipe and form steam. The steam output pipe connects the steam outlet of the water pipe to the cooking cavity. A water supply assembly includes a water tank and a water supply pipeline. The two ends of the water supply pipeline are connected to the outlet of the water tank and the inlet of the water guide pipe, respectively. At least part of the water tank is higher than the water supply pipeline and the water guide pipe. The water supply pipeline is equipped with a check valve structure.

2. The steam rice cooker as described in claim 1, characterized in that, The check valve is configured as a one-way valve.

3. The steam rice cooker as described in claim 2, characterized in that, The opening pressure Pc of the one-way valve satisfies the condition that Pc≤5kpa; And / or, along the length of the water supply pipeline, the distance L between the one-way valve and the inlet of the water guide pipe satisfies L≤500mm.

4. The steam rice cooker as described in claim 2, characterized in that, The water supply assembly also includes an on / off valve, which is located in the water supply pipeline and between the one-way valve and the outlet of the water tank.

5. The steam rice cooker as described in claim 1, characterized in that, The water tank is located on the cover assembly, and the water supply pipeline is equipped with an on / off valve; Alternatively, the water tank may be located within the cooker assembly.

6. The steam rice cooker as described in claim 1, characterized in that, The pot body assembly has an installation space inside. The steam output pipeline includes a first pipeline and a second pipeline. The first pipeline is located in the pot body assembly and is connected to the water guide pipe. The second pipeline is located in the lid assembly. The steam outlet of the second pipeline is exposed on the upper surface of the lid assembly facing the cooking cavity for communication with the cooking cavity. The first pipe and the second pipe are connected at least when the steam rice cooker is in the closed position.

7. The steam rice cooker as described in claim 6, characterized in that, The surface of the pot body assembly facing the lid assembly is provided with a first docking structure communicating with the first pipeline, and the surface of the lid assembly facing the pot body assembly is provided with a second docking structure communicating with the second pipeline; When the steam rice cooker is in the closed position, the first docking structure and the second docking structure are connected.

8. The steam rice cooker as described in claim 1, characterized in that, The steam output pipe is laid through the hinge position between the lid assembly and the pot body assembly, and at least part of the steam output pipe is located on the lid assembly. The steam outlet of the steam output pipe is exposed on the upper surface of the lid assembly facing the cooking cavity for communication with the cooking cavity.

9. The steam rice cooker as described in claim 1, characterized in that, The pot body assembly includes a pot body and a cooking pot body, wherein the cooking pot body is detachably disposed within the pot body, and the cooking pot body is provided with the cooking cavity; The composite heating plate is located below the pot body and is in contact with the pot body.

10. The steam rice cooker as described in any one of claims 1 to 9, characterized in that, The steam rice cooker is also equipped with a first temperature sensor, which is located below the cooking cavity; And / or, the steam rice cooker is further provided with a second temperature sensor, which is located on the lid assembly.

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