Electric cooker

Abstract

The invention provides an electric cooker. The electric cooker comprises a shell provided with a mounting cavity, the mounting cavity comprises a plurality of heating cavities, and openings communicating with the heating cavities in a one-to-one correspondence mode are further formed in the shell; each inner pot is arranged in the corresponding heating cavity through the corresponding opening, and a heating device is arranged in each heating cavity to heat the corresponding inner pot; the at least one fan is arranged in the mounting cavity; the controller is electrically connected with the heating device and the fan, and is configured to determine at least one state adjusting parameter of the fan based on the cooking program and / or the use number of inner pots in the cooking program in a cooking program operation period between a first moment when the cooking program is started and a second moment when the cooking program is finished, and changing the state of the fan based on the determined state adjustment parameter. According to the electric cooker, the fan can be intelligently controlled to operate in combination with the actual use scenes of the multiple inner pots, and the heat dissipation effect of the multi-container electric cooker is guaranteed.

Description

Technical Field

[0001] The present invention relates to the technical field of household appliances, in particular to an electric rice cooker. Background Art

[0002] Existing multi-pot rice cookers have a high overall temperature rise due to the numerous heat sources. When multiple pots are working together, even the outer casing can be hot to the touch. Furthermore, there is significant heat transfer between the inner pots (or inner pots). When one pot is cooking, the adjacent pots will be hotter, even if no cooking is taking place, affecting the user experience. When multiple pots are working together, the cooking process of adjacent pots will also be affected.

[0003] To alleviate this heat transfer problem, a fan can be installed inside a multi-pot rice cooker to draw heat out of the cooker through airflow. However, this type of heat dissipation method typically turns on when the cooking process begins and turns off when the process ends. This makes it difficult to adapt to the varying heating conditions of a multi-pot rice cooker, thus affecting the heat dissipation effect. Summary of the Invention

[0004] Based on this, the present invention aims to provide an improved electric rice cooker to at least solve the problem of temperature crossover between inner pots in a multi-pot electric rice cooker.

[0005] In a first aspect, the present application provides an electric rice cooker, comprising:

[0006] A housing having an installation cavity formed therein, the installation cavity including a plurality of heating cavities, and the housing further having openings communicating with each of the heating cavities in a one-to-one correspondence;

[0007] a plurality of inner pots, each inner pot being placed into a corresponding heating cavity through the opening, and each heating cavity being provided with a heating device for heating the inner pot;

[0008] at least one fan disposed in the installation cavity; and

[0009] A controller is electrically connected to the heating device and the fan, and is configured to determine at least one state adjustment parameter of the fan based on the cooking program and / or the number of inner pots used in the cooking program during the cooking program operation period between a first moment when the cooking program is started and a second moment when the cooking program ends, and to change the state of the fan based on the determined state adjustment parameter.

[0010] The above-mentioned electric rice cooker is provided with a fan in the inner cavity so as to discharge the hot air in the inner cavity of the rice cooker to the outside of the rice cooker after the fan is turned on; and, during the cooking program operation period between a first moment when the cooking program is started and a second moment when the cooking program ends, the fan's state is changed based on the cooking program and / or the number of inner pots used in the cooking program through the automatic control program of the fan, and the fan operation is intelligently controlled to adapt to various heating conditions of multiple inner pots, thereby ensuring effective heat dissipation of the inner cavity of the rice cooker and, to a certain extent, taking into account the cooking effect, heat preservation effect and power saving of the rice cooker.

[0011] In one embodiment, the state adjustment parameters include parameters for controlling the fan to turn on, and the controller is configured to control the fan to remain in an off state at the first moment, and determine the parameters for controlling the fan to turn on based on the cooking program and / or the number of inner pots used in the cooking program during the cooking program operation period, and control the fan to turn on based on the parameters for controlling the fan to turn on.

[0012] In one embodiment, it further includes: at least one temperature measuring unit for detecting the temperature of a target position in the housing and electrically connected to the controller; the parameter for controlling the fan to turn on includes the turning-on temperature of the fan, and the controller is configured to control the fan to turn on when the temperature of the target position reaches the turning-on temperature of the fan.

[0013] In one embodiment, at least one of the multiple inner pots can be quick-cooked; when there is no quick-cooking program in the current cooking program and / or the number of inner pots in use is at least two, the turning-on temperature of the fan is a first turning-on temperature; when there is a quick-cooking program in the current cooking program and the number of inner pots in use is one, the turning-on temperature of the fan is a second turning-on temperature; wherein, the second turning-on temperature is greater than the first turning-on temperature.

[0014] In one embodiment, the second opening temperature is 5° C. to 15° C. higher than the first opening temperature.

[0015] In one embodiment, the target position includes at least one of the following positions: a position located at the bottom of the inner pot; a position located at the lid of the inner pot; a position at a predetermined distance from the center of the fan.

[0016] In one embodiment, the state adjustment parameter further includes the rotation speed of the fan.

[0017] In one embodiment, when the number of inner pots used in the current cooking program is one, the controller controls the fan to operate at a first speed; when the number of inner pots used in the current cooking program is multiple, the controller controls the fan to operate at a second speed; wherein the second speed is greater than the first speed.

[0018] In one embodiment, the speed of the fan is positively correlated with the number of inner pots used in the current cooking program.

[0019] In one embodiment, at least one of the multiple inner pots can be quick-cooked; when there is no quick-cooking program in the current cooking program, the controller controls the fan to operate at a third speed; when there is a quick-cooking program in the current cooking program, the controller controls the fan to operate at a fourth speed; wherein the fourth speed is greater than the third speed.

[0020] In one embodiment, when there are multiple inner pots performing fast cooking in the current cooking program, the controller controls the fan to operate at a fifth speed; wherein the fifth speed is greater than the fourth speed.

[0021] In one embodiment, the state adjustment parameter also includes the speed-up temperature of the fan; the controller is configured to control the fan to operate at a sixth speed when the temperature of the target position does not reach the speed-up temperature of the fan; and to control the fan to operate at a seventh speed when the temperature of the target position reaches the speed-up temperature of the fan; wherein the seventh speed is greater than the sixth speed.

[0022] In one embodiment, the state adjustment parameter also includes the operating stage of the cooking program, and the operating stage includes a first operating stage and a second operating stage located after the first operating stage; the controller is configured to control the fan to operate at an eighth speed when the current cooking program is in the first operating stage; and to control the fan to operate at a ninth speed when the current cooking program is in the second operating stage; wherein the ninth speed is greater than the eighth speed.

[0023] In one embodiment, the water in the inner pot has not yet boiled in the first operation stage, and the water in the inner pot has boiled or dried up in the second operation stage.

[0024] In one embodiment, the controller is configured to control the fan to turn on at an initial speed at the first moment, and determine a tenth speed based on the cooking program and / or the number of inner pots used in the cooking program during the cooking program operation period, and control the fan operation based on the tenth speed.

[0025] In one embodiment, the state adjustment parameters also include parameters for controlling the fan to be turned off, and the controller is further configured to determine the parameters for controlling the fan to be turned off based on the cooking program and / or the number of inner pots used in the cooking program during the cooking program operation period, and control the fan to be turned off based on the parameters for controlling the fan to be turned off.

[0026] In one embodiment, the tenth rotational speed is not equal to the initial rotational speed.

[0027] In one embodiment, it further includes: at least one temperature measuring unit for detecting the temperature of a target position in the housing and electrically connected to the controller; the parameter for controlling the fan to shut down includes the fan's shutdown temperature, and the controller is configured to control the fan to shut down when the temperature of the target position reaches the fan's shutdown temperature.

[0028] In one embodiment, the controller is further configured to determine a shut-off temperature of the fan based on at least a current cooking program, and control the fan to shut off when the temperature at the target location reaches the shut-off temperature of the fan.

[0029] In one embodiment, at least one of the multiple inner pots can be quick-cooked; when there is no quick-cooking program in the current cooking program and / or the number of inner pots in use is at least two, the fan's shut-off temperature is a first shut-off temperature; when there is a quick-cooking program in the current cooking program and the number of inner pots in use is one, the fan's shut-off temperature is a second shut-off temperature; wherein, the second shut-off temperature is greater than the first shut-off temperature.

[0030] In one embodiment, the second shut-off temperature is 5° C. to 15° C. higher than the first shut-off temperature.

[0031] In one embodiment, the controller is further configured to control the fan to be turned off at the second moment or after the second moment.

[0032] In one embodiment, when the number of the fans is at least two, the state adjustment parameter further includes the number of running fans, and the controller is configured to control the state of the fans based on the number of running fans.

[0033] In one embodiment, when the number of the operating fans is at least two, the controller is configured to control the states of the other fans based on the state of one of the fans. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the implementation methods of this specification or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the implementation methods or the description of the prior art. Obviously, the drawings described below are only some implementation methods recorded in this specification. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0035] Figure 1 A side view schematic diagram of an embodiment of the present application;

[0036] Figure 2 for Figure 1 Schematic diagram of the cross section of the AA plane;

[0037] Figure 3 A schematic top view of an embodiment of the present application;

[0038] Figure 4 for Figure 2 Schematic diagram of the cross section of the middle BB surface;

[0039] Figure 5 This is a schematic diagram of module connections in an embodiment of the present application;

[0040] Figure 6 This is a schematic diagram of module connections in an embodiment of the present application;

[0041] Figure 7 Schematic diagram of each stage of the cooking process according to an embodiment of the present application;

[0042] Figure 8 This is a partial schematic diagram of the base cavity according to an embodiment of the present application;

[0043] Figure 9 This is a schematic diagram of the connection structure between the heating device and the inner pot in an embodiment of the present application.

[0044] Component number description:

[0045] 100. Rice cooker;

[0046] 10. Shell, 21-23. Inner pot, 30. Heating device, 40. Fan;

[0047] P1, first target position, P2, second target position, P3, third target position;

[0048] M1, the first operating stage; M2, the second operating stage. DETAILED DESCRIPTION

[0049] To make the above-mentioned objects, features, and advantages of the present invention more readily apparent, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings. The following description sets forth numerous specific details to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways than those described herein, and those skilled in the art may make similar modifications without departing from the scope of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0050] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0051] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "plurality" means at least two, such as two, three, etc., unless otherwise specifically defined.

[0052] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be an intermediate element. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and similar expressions used herein are for illustrative purposes only and do not represent the only implementation methods.

[0053] An embodiment of the present application provides an electric rice cooker, in which a fan is provided inside to discharge hot air from an inner cavity of the electric rice cooker to the outside of the electric rice cooker after the fan is turned on; and, during a cooking program operation period between a first moment when the cooking program starts and a second moment when the cooking program ends, the fan's state is changed based on the cooking program and / or the number of inner pots used in the cooking program through an automatic control program of the fan, and the fan operation is intelligently controlled to adapt to various heating conditions of multiple inner pots, thereby ensuring effective heat dissipation of the inner cavity of the electric rice cooker and, to a certain extent, taking into account the cooking effect, heat preservation effect and power saving of the electric rice cooker.

[0054] like Figures 1 to 5 The embodiment of the present application provides an electric rice cooker 100, comprising a shell 10, wherein the shell 10 has an installation cavity formed therein, the installation cavity including a plurality of heating cavities, and the shell 10 is further formed with openings communicating with each heating cavity in a one-to-one manner; a plurality of inner pots, each of which is placed in a corresponding heating cavity through the opening, each heating cavity being provided with a heating device 30 for heating the inner pot; at least one fan 40 located inside the shell 10; and a controller electrically connected to the heating device 30 and the fan 40, and configured to determine at least one state adjustment parameter of the fan 40 based on the cooking program and / or the number of inner pots used in the cooking program during a cooking program running period between a first moment when the cooking program is started and a second moment when the cooking program ends, and to change the state of the fan 40 based on the determined state adjustment parameter.

[0055] Exemplarily, the cooking program running time period represents a time period that does not include the first moment when the cooking program is started and the second moment when the cooking program ends. During the cooking program running time period, the state of the fan 40 can be changed according to the cooking program and / or the number of inner pots used in the cooking program to adapt to the different heating conditions of multiple inner pots. For example, when it is necessary to maintain a certain amount of heat in the cavity to speed up the cooking of rice, the controller can control the fan 40 not to turn on at the first moment, but to turn it on during the cooking program running time period. The state adjustment parameters may include parameters for controlling the fan 40 to turn on. For another example, to prevent the temperature in the cavity from increasing as the number of inner pots used increases, the fan 40 can be controlled to increase its speed during the cooking program running time period to achieve effective heat dissipation. In this case, the state adjustment parameters may also include the speed of the fan 40. For another example, to maintain a certain insulation effect, the controller can control the fan 40 to turn off during the cooking program running time period. The state adjustment parameters may include parameters for controlling the fan 40 to turn off.

[0056] Optionally, at the first moment when the cooking program starts, the controller can control the fan 40 to turn on or keep the fan 40 off; at the second moment when the cooking program ends, the controller can control the fan 40 to keep on or keep the fan 40 off.

[0057] For example, Figure 2 and Figure 4 As shown, the multiple inner pots include inner pot 21, inner pot 22, and inner pot 23, and the multiple heating chambers include heating chamber 111, heating chamber 112, and heating chamber 113. The inner pot 21 is placed in the heating chamber 111 through the opening, the inner pot 22 is placed in the heating chamber 112 through the opening, and the inner pot 23 is placed in the heating chamber 113 through the opening.

[0058] Optional, such as Figure 8 and Figure 9As shown, after removing the inner pot, it can be seen that the electric rice cooker 100 also includes a heat preservation cover arranged on the outside of the inner pot, a heating plate and a center cover assembly arranged at the bottom of the inner pot, wherein the heating device 30 may include a heating plate and a heating tube inserted in the heating plate. After the heating tube is powered on and generates heat, the heat is transferred to the heating plate to heat the inner pot. The center cover assembly passes through the center hole of the heating plate and can float up and down. Optionally, each inner pot may be respectively provided with a corresponding heating plate for heating. Optionally, the front of the heating plate can be in full contact with the bottom surface of the inner pot. Optionally, studs are evenly provided on the back of the heating plate, which can be connected to the screw holes and studs on the heat preservation cover by screws. Optionally, the heating plate can be assembled into a component with the heat preservation cover, and then assembled to the middle frame. Optionally, the heating plate is an aluminum die-cast structure.

[0059] For example, Figure 2 and Figure 4 As shown, the fan 40 can be in the form of a component, for example, it can include fan blades, a rotating shaft connected to the fan blades, and a motor, and can also include a bracket for mounting itself to the housing 10. When turned on, the fan 40 can draw cool air from the environment into the various cavities of the rice cooker 100 to absorb heat within the cavities. After flowing through each cavity, the fan 40 is discharged from the air outlet, removing the heat within the rice cooker 100. The cavities of the rice cooker 100 are interconnected. Optionally, the fan 40 can be located at the bottom of the housing 10, so that the airflow formed passes through the various components within the cavities of the rice cooker 100 from at least bottom to top, thereby removing heat to the outside of the rice cooker 100.

[0060] In some embodiments of the present application, the state adjustment parameters include parameters for controlling the fan 40 to be turned on. The controller is configured to control the fan 40 to remain off at a first moment, and to determine the parameters for controlling the fan 40 to be turned on based on the cooking program and / or the number of inner pots used in the cooking program during the cooking process, and to control the fan 40 to be turned on based on the parameters for controlling the fan 40 to be turned on. After the fan 40 is turned on, the controller may further determine the operating parameters of the fan 40 (e.g., speed, acceleration temperature, cooking program phase, etc.) based on the cooking program and / or the number of inner pots used in the cooking program, and further control the operation of the fan 40 based on the operating parameters. It is understood that the controller may also control the fan 40 to be turned off based on the parameters for controlling the fan 40 to be turned off. However, the fan 40 may be turned off during the cooking program, at a second moment, or after the second moment, and this is not limited in this embodiment. Optionally, at least one of the multiple inner pots can be fast-cooked, so that a fast-cooking process may be included in the current cooking process.

[0061] For example, the parameters for controlling the fan 40 to be turned on may include a turn-on temperature, a turn-on stage, a turn-on time, and the like.

[0062] Taking the activation temperature as an example, the controller may determine the activation temperature of the fan 40 based on the current cooking program. For example, if the current cooking program is a normal cooking program, the controller may determine the activation temperature to be 100°C. Then, when the temperature of the inner pot reaches 100°C, the controller may control the fan 40 to turn on. For another example, if the current cooking program includes a quick cooking program, the controller may determine the activation temperature to be 110°C. Then, when the temperature of the inner pot reaches 110°C, the controller may control the fan 40 to turn on. The controller may also determine the activation temperature of the fan 40 based on the number of inner pots used in the current cooking program. For example, if multiple inner pots are used in the current cooking program, the controller may determine the activation temperature to be 100°C. Then, when the temperature of the inner pot reaches 100°C, the controller may control the fan 40 to turn on. For another example, if only one inner pot is used in the current cooking program, the controller may determine the activation temperature to be 110°C. Then, when the temperature of the inner pot reaches 110°C, the controller may control the fan 40 to turn on. The controller can also determine the turning-on temperature of the fan 40 based on the current cooking program and the number of inner pots used in the current cooking program. For example, when there is no quick cooking program in the current cooking program and / or the number of inner pots used is not 1, the controller can determine the turning-on temperature to be 100°C, and then when the temperature of the inner pot reaches 100°C, the controller can control the fan 40 to turn on. For another example, when there is a quick cooking program in the current cooking program and the number of inner pots used is 1, the controller can determine the turning-on temperature to be 110°C, and then when the temperature of the inner pot reaches 110°C, the controller can control the fan 40 to turn on.

[0063] The controller can also determine the activation stage of the fan 40 based on the current cooking program and / or the number of inner pots used in the current cooking program. The corresponding activation stage can be different in different situations. For example, if the cooking program has stages such as preheating, heating, boiling, cooking, and stewing, and the current cooking program is a normal cooking program, the controller can determine that the starting stage is the heating stage, and then when the current cooking program is in the heating stage, the controller can control the fan 40 to turn on. For another example, if there is a fast cooking program in the current cooking program, the controller can determine that the starting stage is the boiling stage, and then when the current cooking program is in the boiling stage, the controller can control the fan 40 to turn on. Other confirmation conditions of the activation stage and the corresponding control conditions of the fan 40 can refer to the aforementioned activation temperature and will not be repeated here.

[0064] The controller can also determine the start time of the fan 40 based on the current cooking program and / or the number of inner pots used in the current cooking program. The corresponding start time can be different in different situations. For example, if the current cooking program is a normal cooking program, the controller can determine the start time to be 10 minutes into the current cooking program. That is, after the current cooking program has run for 10 minutes, the controller can control the fan 40 to turn on. For another example, if the current cooking program includes a quick cooking program, the controller can determine the start time to be 15 minutes into the current cooking program. That is, after the current cooking program has run for 15 minutes, the controller can control the fan 40 to turn on. Other confirmation conditions for the start time and the corresponding fan 40 control conditions can also refer to the above-mentioned start temperature and will not be repeated here.

[0065] It is understood that the activation parameters may include one or more of an activation temperature, an activation stage, and an activation time. When there are multiple activation parameters, the fan 40 may be controlled to be activated by setting the priority of the activation parameters, or by setting the activation parameters to satisfy some or all of the predetermined parameters. The specific setting method may be determined based on the actual application requirements of the rice cooker 100, and this application does not impose any restrictions thereon.

[0066] Exemplarily, the operating parameters may include the speed, power, acceleration temperature, and the operating stage of the cooking program when the fan 40 is running. It will be understood that when the fan 40 is turned on, the operating parameters of the fan 40 may be constant or may vary based on the current cooking program and / or the number of inner pots used in the current cooking program. When the operating parameters of the fan 40 are partially or completely constant, the complexity of program design can be reduced, thereby reducing the preparation cost of the rice cooker 100; and when the operating parameters of the fan 40 are variable, it can be ensured that the cooking program will not be affected and that the temperature of the inner cavity of the rice cooker 100 is always within an appropriate temperature range, thereby improving the intelligent heat dissipation characteristics of the rice cooker 100. Optionally, the operating parameters may include one or more of the speed, power, acceleration temperature, and the operating stage of the cooking program when the fan 40 is running.

[0067] Furthermore, taking the speed of fan 40 as an example, the controller may determine the speed of fan 40 based on the current cooking program. For example, if the current cooking program is a normal cooking program, the controller may determine the speed of fan 40 to be 1800 r / min, and then control the fan to operate at 1800 r / min. For another example, if the current cooking program includes a quick cook program, the controller may determine the speed of fan 40 to be 2800 r / min, and then control the fan 40 to operate at 2800 r / min. The controller may also determine the speed of fan 40 based on the number of inner pots used in the current cooking program. For example, if the number of inner pots used in the current cooking program is one, the controller may determine the speed of fan 40 to be 1800 r / min, and then control the fan 40 to operate at 1800 r / min. For another example, if the number of inner pots used in the current cooking program is multiple, the controller may determine the speed of fan 40 to be 2800 r / min, and then control the fan 40 to operate at 2800 r / min. The controller can also determine the speed of the fan 40 based on the current cooking program and the number of inner pots used in the current cooking program. For example, when there is a quick cooking program in the current cooking program and there are multiple inner pots used, the controller can determine the speed of the fan 40 to be 2800r / min, and then control the fan 40 to operate at a speed of 2800r / min. For another example, when there is no quick cooking program in the current cooking program and / or the number of inner pots used is not multiple, the controller can determine the speed of the fan 40 to be 1800r / min, and then control the fan 40 to operate at a speed of 1800r / min.

[0068] For example, the parameters for controlling the fan 40 to be turned off may include a turn-off temperature, a turn-off stage, a turn-off time, etc. It is understood that the parameters for controlling the fan 40 to be turned off may be constant or may vary based on the current cooking program and / or the number of inner pots used in the current cooking program. Alternatively, the turn-off parameters may include one or more of the turn-off temperature, the turn-off stage, and the turn-off time.

[0069] In some embodiments of the present application, Figure 6 As shown, the rice cooker 100 further includes a temperature measuring unit for detecting the temperature of a target location within the housing 10 and electrically connected to the controller. Thus, when the parameter for controlling the fan 40 to turn on includes the turn-on temperature of the fan 40, the controller can be configured to control the fan 40 to turn on when the temperature at the target location reaches the turn-on temperature of the fan 40. On the other hand, when the parameter for controlling the fan 40 to turn off includes the turn-off temperature of the fan 40, the controller can be configured to control the fan 40 to turn off when the temperature at the target location reaches the turn-off temperature of the fan 40.

[0070] In some embodiments of the present application, Figure 1 and Figure 2As shown, the target position includes at least one of the following: a first target position P1 located at the bottom of the inner pot, a second target position P2 located at the lid of the inner pot, and a third target position P3 indicating a position near the fan 40. Exemplarily, the bottom of the inner pot contacts the center cover assembly, so the first target position P1 may correspond to the center cover assembly, allowing the temperature measuring unit to be positioned within the center cover assembly. The second target position P2 may be located anywhere on the lid, allowing the temperature measuring unit to be positioned there. The third target position P3 may be located a predetermined distance from the center of the fan 40, allowing the temperature measuring unit to be positioned near the fan 40. Optionally, the predetermined distance may be greater than or equal to the length or width of the fan 40. Exemplarily, the center cover assembly is movable and passes through the center hole of the heating device 30. Positioning notches are provided on both sides of the center cover assembly. These notches cooperate with posts on either side of the center hole of the heating device 30 for positioning, thereby preventing the center cover assembly from shaking or shifting.

[0071] In some embodiments of the present application, when the current cooking program does not include a quick cook program and / or there are at least two inner pots in use, the fan 40 is activated at a first activation temperature. When the current cooking program includes a quick cook program and there is only one inner pot in use, the fan is activated at a second activation temperature, wherein the second activation temperature is greater than the first activation temperature. This helps ensure that the fan 40 is not activated prematurely when one inner pot is in quick cook mode, thereby prioritizing the temperature rise rate and allowing the rice in the quick cooker to cook as quickly as possible. Furthermore, when the cooking program does not include a quick cook program and / or there are multiple inner pots in use, the activation temperature does not need to be increased, thereby ensuring that the temperature inside the rice cooker cavity is not too high while still meeting cooking requirements.

[0072] Optionally, when the target positions include the first target position P1, the first opening temperature is less than 110°C, for example, it may be one of 95°C, 98°C, 100°C, 102°C, 105°C, or 108°C; the second opening temperature is less than 120°C, for example, it may be one of 105°C, 108°C, 110°C, 112°C, or 115°C. Optionally, the second opening temperature is 5°C to 15°C higher than the first opening temperature. For example, when the first opening temperature is 100°C, the second opening temperature may be one of 105°C, 108°C, 110°C, 112°C, or 115°C. Optionally, when the target positions include the second target position P2, the first opening temperature is less than 90°C, for example, it may be one of 75°C, 78°C, 80°C, 82°C, 85°C, or 88°C; the second opening temperature is less than 100°C, for example, it may be one of 80°C, 85°C, 90°C, 92°C, or 95°C. Optionally, when the target position includes the third target position P3, the first opening temperature is less than 70°C, for example, it can be one of 55°C, 60°C, and 65°C, and the second opening temperature is less than 80°C, for example, it can be one of 65°C, 70°C, and 75°C.

[0073] In some embodiments of the present application, when the current cooking program does not include a quick cook program and / or there are at least two inner pots in use, the fan shut-off temperature is a first shut-off temperature. When the current cooking program includes a quick cook program and there is only one inner pot in use, the fan shut-off temperature is a second shut-off temperature, wherein the second shut-off temperature is greater than the first shut-off temperature. This helps ensure that the fan 40 is not shut off too late when one inner pot is in quick cook mode, prioritizing heat within the quick cook pot. When the cooking program does not include a quick cook program and / or there are multiple inner pots in use, the fan 40 can be operated for a sufficient duration without increasing the shut-off temperature, ensuring that the temperature within the rice cooker cavity remains below zero while still meeting cooking requirements. Optionally, the first shut-off temperature is 10°C to 20°C lower than the first activation temperature, and the second shut-off temperature is 10°C to 20°C lower than the second activation temperature.

[0074] Optionally, when the target position includes the first target position P1, the first shut-off temperature is less than 100°C, for example, 85°C, 88°C, 90°C, 92°C, 95°C, or 98°C; and the second shut-off temperature is less than 110°C, for example, 95°C, 98°C, 102°C, 105°C, or 108°C. Optionally, the second shut-off temperature is 5°C to 15°C higher than the first shut-off temperature. For example, when the first shut-off temperature is 90°C, the second shut-off temperature may be one of 95°C, 98°C, 100°C, 102°C, and 105°C. Optionally, when the target position includes the first target position P2, the first shut-off temperature is less than 80°C, for example, 65°C, 68°C, 70°C, 72°C, 75°C, or 78°C; and the second shut-off temperature is less than 90°C, for example, 75°C, 78°C, 82°C, 85°C, or 88°C. Optionally, when the target position includes the third target position P3, the first shutdown temperature is less than 65°C, for example, it can be one of 50°C, 55°C, 60°C, and 63°C, and the second shutdown temperature is less than 75°C, for example, it can be one of 60°C, 65°C, 70°C, and 73°C.

[0075] Optionally, when there are multiple target locations, the controller can be configured to control the fan 40 to turn off when the temperatures of the multiple target locations all reach their corresponding fan off temperatures. This helps to ensure the working time of the fan 40, thereby further ensuring the heat dissipation effect.

[0076] In some embodiments of the present application, the state adjustment parameters may include, in addition to parameters for controlling the activation of the fan 40, the speed of the fan 40. When one inner pot is used in the current cooking process, the controller controls the fan to operate at a first speed; when multiple inner pots are used in the current cooking process, the controller controls the fan to operate at a second speed, wherein the second speed is greater than the first speed. It will be appreciated that when the temperature of the bottoms and / or lids of multiple inner pots exceeds the fan activation temperature, the fan may also operate at a speed greater than or equal to the second speed. This helps ensure that the temperature inside the rice cooker cavity does not become too high while meeting cooking requirements. Optionally, the first speed is less than 5000r / min, for example, it can be 1000r / min, 2000r / min, 3000r / min, 4000r / min, 4500r / min, and the second speed is less than or equal to 5000r / min, for example, it can be 1500r / min, 2500r / min, 3500r / min, 4500r / min, 5000r / min.

[0077] Furthermore, the speed of fan 40 is positively correlated with the number of inner pots in use during the current cooking process. That is, the more inner pots are used, the faster the fan 40 rotates, thereby improving heat dissipation. It is understood that the speed increase of fan 40 is limited by the performance of the fan motor, and thus has a maximum speed. Once the speed of fan 40 reaches the maximum, the speed of fan 40 will not increase even if the number of inner pots used continues to increase.

[0078] In some embodiments of the present application, when there is no quick cooking program in the current cooking program, the controller controls the fan 40 to operate at a third speed; when there is a quick cooking program in the current cooking program, the controller controls the fan 40 to operate at a fourth speed; wherein the fourth speed is greater than the third speed. This is beneficial for ensuring that the temperature inside the rice cooker cavity is not too high while meeting cooking requirements. Optionally, the third speed is less than 5000 r / min, for example, it can be 1000 r / min, 2000 r / min, 3000 r / min, 4000 r / min, or 4500 r / min, and the fourth speed is less than or equal to 5000 r / min, for example, it can be 1500 r / min, 2500 r / min, 3500 r / min, 4500 r / min, or 5000 r / min.

[0079] Furthermore, when multiple inner pots are being cooked quickly in the current cooking program, the controller controls the fan 40 to operate at a fifth speed, which is greater than the fourth speed. This helps to meet the cooking needs of multiple pots being cooked quickly while ensuring that the temperature inside the rice cooker cavity is not too high.

[0080] In some embodiments of the present application, the state adjustment parameters, in addition to including parameters for controlling the activation of the fan 40, may also include a speed-up temperature for the fan 40. The controller is configured to control the fan to operate at a sixth speed when the temperature at the target location does not reach the fan speed-up temperature; and to control the fan to operate at a seventh speed when the temperature at the target location reaches the fan speed-up temperature. The seventh speed is greater than the sixth speed. This helps further ensure that the temperature inside the rice cooker cavity does not become too high while meeting cooking requirements. Optionally, the sixth speed is less than 5000 r / min, for example, 1000 r / min, 2000 r / min, 3000 r / min, 4000 r / min, or 4500 r / min, and the seventh speed is less than or equal to 5000 r / min, for example, 1500 r / min, 2500 r / min, 3500 r / min, 4500 r / min, or 5000 r / min. The speed-up temperature setting may also change with the target position selection. For example, when the target position includes the first target position P1, the speed-up temperature may be less than 120°C, for example, it may be one of 105°C, 108°C, 110°C, 112°C, or 115°C. When the target position includes the second target position P2, the speed-up temperature may be less than 100°C, for example, it may be one of 80°C, 85°C, 90°C, 92°C, or 95°C. When the target position includes the third target position P3, the speed-up temperature may be less than 80°C, for example, it may be one of 65°C, 70°C, or 75°C. Optionally, when there are multiple target positions, the controller may be configured to control the fan to increase its speed when the temperatures at the multiple target positions all reach their corresponding fan speed-up temperatures. This helps prevent the fan 40 from speeding up too early and affecting the cooking effect.

[0081] In some embodiments of the present application, the cooking process can be as follows: Figure 7The various operating stages shown include a first operating stage M1 and a second operating stage M2 located after the first operating stage M1, so that the state adjustment parameters include not only parameters for controlling the turning on of the fan 40, but also the operating stages of the cooking program. The controller is configured to control the fan to operate at an eighth speed when the current cooking program is in the first operating stage M1; and to control the fan to operate at a ninth speed when the current cooking program is in the second operating stage M2; wherein the ninth speed is greater than the eighth speed. In this way, it is beneficial to ensure that the temperature in the rice cooker cavity is not too high at different stages of the cooking program while meeting cooking needs. Optionally, the eighth speed is less than 5000r / min, for example, it can be 1000r / min, 2000r / min, 3000r / min, 4000r / min, 4500r / min, and the ninth speed is less than or equal to 5000r / min, for example, it can be 1500r / min, 2500r / min, 3500r / min, 4500r / min, and 5000r / min. Optionally, as Figure 7 As shown, the first operating stage M1 includes a preheating stage and a heating stage, and the second operating stage M2 includes a boiling heating maintenance stage, a boiling until the water is boiled dry stage, a stewing stage, and a heat preservation stage. That is, in the first operating stage M1, the water in the inner pot has not yet boiled, and in the second operating stage M2, the water in the inner pot has boiled or has been boiled dry.

[0082] In some embodiments of the present application, the rice cooker 100 also includes a powerful cooling mode. In this powerful cooling mode, the fan 40 runs at the highest speed to achieve rapid cooling. Optionally, this powerful cooling mode can be selected by the user or controlled by the controller when the controller detects that the temperature of any target location exceeds a preset temperature threshold.

[0083] In some embodiments of the present application, the controller is configured to control the fan to start at an initial speed at a first moment, and then, during the cooking process, determine a tenth speed based on the cooking process and / or the number of inner pots used in the cooking process, and control the fan 40 to operate based on the tenth speed. Optionally, the tenth speed is not equal to the initial speed. Optionally, the initial speed is less than the tenth speed, thereby saving power. By determining a tenth speed different from the initial speed of the fan 40 based on the cooking process and / or the number of inner pots used in the cooking process, that is, the tenth speed can adapt to the actual heating conditions of multiple inner pots, thereby ensuring effective heat dissipation.

[0084] Furthermore, the state adjustment parameters include, in addition to the operating parameters of the fan 40, parameters for controlling the fan 40 to be turned off. The controller is configured to control the fan 40 to be turned on at a first moment, and to determine the operating parameters of the fan 40 and the parameters for controlling the fan 40 to be turned off during the cooking process based on the cooking process and / or the number of inner pots used during the cooking process. The controller is then configured to control the fan 40 to be turned on and off based on the operating parameters and the parameters for controlling the fan 40 to be turned off. By controlling the fan 40 to be turned on and off during the cooking process, the appropriate temperature in the rice cooker 100 can be maintained while preventing the fan 40 from operating for too long, which could affect the heat preservation effect.

[0085] In some embodiments of the present application, the state adjustment parameters include parameters for controlling the fan 40 to be turned off. The controller is configured to control the fan 40 to be turned on at a first moment, and to determine the parameters for controlling the fan 40 to be turned off during the cooking process based on the cooking process and / or the number of inner pots used during the cooking process, and to control the fan 40 to be turned off based on the parameters for controlling the fan 40 to be turned off. By controlling the fan 40 to be turned off during the cooking process, a certain temperature can be maintained in the rice cooker 100, preventing the fan 40 from running for too long, which may affect the heat preservation effect.

[0086] In some embodiments of the present application, the parameters used to control the fan 40 to shut down may include the shutdown temperature of the fan 40. For example, when one or more temperature measuring units in the aforementioned target position detect that the temperature of the target position reaches the shutdown temperature of the fan 40, the controller may control the fan 40 to shut down.

[0087] In some embodiments of the present application, the controller is further configured to control the fan 40 to be turned off at or after the second moment. By turning off or delaying the fan 40 at the second moment when the cooking process ends, it is beneficial to further ensure the heat dissipation effect of the rice cooker 100 cavity.

[0088] In some embodiments of the present application, when the number of fans 40 is at least two, the state adjustment parameter also includes the number of fans 40 in operation, and the controller is configured to control the state of the fans 40 based on the number of fans 40 in operation. For example, when the rice cooker 100 is equipped with multiple fans 40, when a cooking program is initiated, one fan 40 is simultaneously turned on. If a quick cook program is included in the cooking program and / or multiple inner pots are in use, the number of fans 40 in operation may be determined to be two or more. Based on this determined number of fans 40 in operation, the state of the fans 40 may be changed, i.e., more fans 40 may be turned on. For example, if a keep warm program is included in the cooking program and / or the number of inner pots in use decreases, the number of fans 40 in operation may be determined to be reduced accordingly. For example, if three fans 40 were originally in operation, the number of fans 40 in operation may be determined to be one or two. Based on this determined number of fans 40 in operation, the controller may change the state of the fans 40, i.e., turn off some of the fans 40. This coordinated control of multiple fans 40 helps to better ensure heat dissipation and cooking performance within the rice cooker 100 cavity.

[0089] Furthermore, when there are at least two fans 40 in operation, the controller is configured to control the states of the other fans 40 based on the state of one of the fans 40. For example, taking the case of two fans 40 in operation, when it is detected that one fan 40 has been running at maximum speed for a long time, the controller may control the other fan 40 to increase its speed to further ensure heat dissipation; when it is detected that one fan 40 suddenly turns off during a cooking program, the controller may control the other fan 40 to increase its speed to ensure heat dissipation; and when it is detected that one fan 40 has reduced its speed, the controller may control the other fan 40 to also reduce its speed or turn off after a predetermined period of time to ensure heat preservation in the rice cooker 100.

[0090] The technical features of the above-mentioned embodiments can be combined arbitrarily. In order to make the description concise, not all possible combinations of the technical features in the above-mentioned embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0091] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the patent for this invention shall be determined by the appended claims.

Claims

1. An electric rice cooker, characterized in that: include: A housing having an installation cavity formed therein, the installation cavity including a plurality of heating cavities, and the housing further having openings communicating with each of the heating cavities in a one-to-one correspondence; a plurality of inner pots, each inner pot being placed into a corresponding heating cavity through the opening, and each heating cavity being provided with a heating device for heating the inner pot; at least one fan, disposed in the installation cavity; as well as, A controller is electrically connected to the heating device and the fan, and is configured to determine at least one state adjustment parameter of the fan based on the cooking program and / or the number of inner pots used in the cooking program during the cooking program operation period between a first moment when the cooking program is started and a second moment when the cooking program ends, and to change the state of the fan based on the determined state adjustment parameter.

2. The electric rice cooker according to claim 1, characterized in that The state adjustment parameters include parameters for controlling the fan to be turned on, the controller being configured to control the fan to remain in an off state at the first moment, and to determine the parameters for controlling the fan to be turned on based on the cooking program and / or the number of inner pots used in the cooking program during a cooking program execution period, and to control the fan to be turned on based on the parameters for controlling the fan to be turned on; Preferably, the electric rice cooker further comprises at least one temperature measuring unit for detecting the temperature of a target position in the housing and electrically connected to the controller; the parameter for controlling the fan to turn on comprises a turning-on temperature of the fan, and the controller is configured to control the fan to turn on when the temperature of the target position reaches the turning-on temperature of the fan; Preferably, at least one of the multiple inner pots can be fast-cooked; when the fast-cooking program does not exist in the current cooking program and / or the number of inner pots in use is at least two, the fan is turned on at a first temperature; when the fast-cooking program exists in the current cooking program and the number of inner pots in use is one, the fan is turned on at a second temperature; wherein the second temperature is greater than the first temperature. Preferably, the second opening temperature is 5°C to 15°C higher than the first opening temperature; Preferably, the target position includes at least one of the following positions: a position located at the bottom of the inner pot; a position located at the lid of the inner pot; and a position at a predetermined distance from the center of the fan.

3. The electric rice cooker according to claim 2, characterized in that The state adjustment parameter also includes the rotation speed of the fan; Preferably, when the number of inner pots used in the current cooking program is one, the controller controls the fan to operate at a first speed; when the number of inner pots used in the current cooking program is multiple, the controller controls the fan to operate at a second speed; wherein the second speed is greater than the first speed; Preferably, the speed of the fan is positively correlated with the number of inner pots used in the current cooking program; Preferably, at least one of the plurality of inner pots can be fast-cooked; when the fast-cooking program does not exist in the current cooking program, the controller controls the fan to operate at a third speed; when the fast-cooking program exists in the current cooking program, the controller controls the fan to operate at a fourth speed; wherein the fourth speed is greater than the third speed; Preferably, when there are multiple inner pots performing fast cooking in the current cooking program, the controller controls the fan to operate at a fifth speed; wherein the fifth speed is greater than the fourth speed.

4. The electric rice cooker according to claim 3, characterized in that The state adjustment parameters also include the speed-up temperature of the fan; the controller is configured to control the fan to operate at a sixth speed when the temperature of the target position does not reach the speed-up temperature of the fan; and to control the fan to operate at a seventh speed when the temperature of the target position reaches the speed-up temperature of the fan; wherein the seventh speed is greater than the sixth speed.

5. The electric rice cooker according to claim 3, characterized in that The state adjustment parameter also includes an operation stage of the cooking program, wherein the operation stage includes a first operation stage and a second operation stage located after the first operation stage; the controller is configured to control the fan to operate at an eighth speed when the current cooking program is in the first operation stage; and to control the fan to operate at a ninth speed when the current cooking program is in the second operation stage; wherein the ninth speed is greater than the eighth speed; Preferably, the water in the inner pot has not yet boiled in the first operation stage, and the water in the inner pot has boiled or dried up in the second operation stage.

6. The electric rice cooker according to claim 3, characterized in that The controller is configured to control the fan to turn on at an initial speed at the first moment, and determine a tenth speed based on the cooking program and / or the number of inner pots used in the cooking program during the cooking program operation period, and control the fan to operate based on the tenth speed; Preferably, the tenth speed is not equal to the initial speed.

7. The electric rice cooker according to claim 2, characterized in that The state adjustment parameters further include parameters for controlling the fan to be turned off, and the controller is further configured to determine the parameters for controlling the fan to be turned off based on the cooking program and / or the number of inner pots used in the cooking program during a cooking program execution period, and control the fan to be turned off based on the parameters for controlling the fan to be turned off; Preferably, the electric rice cooker further comprises: at least one temperature measuring unit for detecting the temperature of a target position in the housing and electrically connected to the controller; the parameter for controlling the fan to be turned off comprises a shut-off temperature of the fan, and the controller is configured to control the fan to be turned off when the temperature of the target position reaches the shut-off temperature of the fan; Preferably, the controller is further configured to determine a shut-off temperature of the fan based at least on a current cooking program, and control the fan to shut off when the temperature at the target location reaches the shut-off temperature of the fan; Preferably, at least one of the multiple inner pots can be fast-cooked; when the current cooking program does not include a fast-cooking program and / or the number of inner pots in use is at least two, the fan is turned off at a first temperature; when the current cooking program includes a fast-cooking program and the number of inner pots in use is one, the fan is turned off at a second temperature; wherein the second temperature is greater than the first temperature. Preferably, the second shut-off temperature is 5° C. to 15° C. higher than the first shut-off temperature.

8. The electric rice cooker according to claim 1, characterized in that The controller is further configured to control the fan to be turned off at or after the second moment.

9. The electric rice cooker according to claim 1, characterized in that When the number of the fans is at least two, the state adjustment parameter further includes the number of the fans in operation, and the controller is configured to control the state of the fans based on the number of the fans in operation.

10. The electric rice cooker according to claim 9, characterized in that When the number of the operating fans is at least two, the controller is configured to control states of the other fans based on a state of one of the fans.

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