WO2020062650A1 - 烹饪器具及其保温控制方法、确定方法 - Google Patents

烹饪器具及其保温控制方法、确定方法 Download PDF

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WO2020062650A1
WO2020062650A1 PCT/CN2018/122915 CN2018122915W WO2020062650A1 WO 2020062650 A1 WO2020062650 A1 WO 2020062650A1 CN 2018122915 W CN2018122915 W CN 2018122915W WO 2020062650 A1 WO2020062650 A1 WO 2020062650A1
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Prior art keywords
temperature
cooking appliance
predetermined
temperature change
heating device
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PCT/CN2018/122915
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English (en)
French (fr)
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张力文
孔进喜
王江南
陈海鹏
张伶俐
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珠海格力电器股份有限公司
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Priority to JP2020570413A priority Critical patent/JP7152526B2/ja
Publication of WO2020062650A1 publication Critical patent/WO2020062650A1/zh

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    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/08Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/0802Control mechanisms for pressure-cookers
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00Cooking-vessels
    • A47J27/08Pressure-cookers; Lids or locking devices specially adapted therefor
    • A47J27/086Pressure-cookers; Lids or locking devices specially adapted therefor with built-in heating means
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • A47J36/24Warming devices
    • A47J36/2483Warming devices with electrical heating means
    • AHUMAN NECESSITIES
    • A47FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47JKITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00Parts, details or accessories of cooking-vessels
    • A47J36/32Time-controlled igniting mechanisms or alarm devices

Definitions

  • the invention relates to the technical field of kitchen appliances, in particular to a cooking appliance and a method for controlling and determining a heat preservation thereof.
  • one of the objectives of the present invention is to provide a cooking appliance, a method for controlling heat preservation, and a method for determining the same, in order to solve the problem that the heat preservation in different situations is not adaptively adjusted during a long time heat preservation process.
  • the present invention adopts the following technical solutions:
  • a heat preservation control method for a cooking appliance includes a controller and an upper heating device.
  • the heat preservation control method includes:
  • the controller obtains the internal temperature T of the cooking appliance and determines whether the internal temperature T is less than or equal to a first predetermined temperature T1, and if so, controls the cooking appliance to enter Heating stage, otherwise controlling the upper heating device to be turned off until the internal temperature T is less than or equal to the first predetermined temperature T1, controlling the cooking appliance to enter the heating stage,
  • the controller controls the upper heating device to perform heating in a predetermined manner.
  • the predetermined manner includes:
  • the controller controls the upper heating device to intermittently heat.
  • the method for controlling the intermittent heating of the upper heating device includes:
  • the upper heating device When the internal temperature T is greater than a third predetermined temperature T3, the upper heating device is controlled to be turned off until the internal temperature T is less than or equal to the second predetermined temperature T2, and the upper heating device is controlled to be turned on.
  • a power supply voltage of the cooking appliance or an actual voltage of an electric device of the cooking appliance is detected, and the heating power of the upper heating device is adjusted according to the actual voltage.
  • a determining method for determining a first predetermined temperature T1 in the thermal insulation control method as described above the range of the first predetermined temperature T1 is [T4, T5], T4 is a fourth predetermined temperature, and T5 is a fifth Predetermined temperature,
  • the determining method includes:
  • the fifth predetermined temperature T5 is determined based on at least a temperature change condition of the internal temperature T and a temperature change condition of the controller in a natural cooling state.
  • the method for determining the fourth predetermined temperature T4 at least according to a temperature change of the internal temperature T in a natural cooling state and a temperature change of a condensed water attachment place on an appliance cover of the cooking appliance includes:
  • the thermal insulation control method is the thermal insulation control method according to claim 4, and the method for determining the first temperature correction coefficient ⁇ T1 includes:
  • a temperature change amount from a time point t1- ⁇ t1 to a time point t1 in the second temperature change curve is obtained, and the temperature change amount is used as the first temperature correction coefficient ⁇ T1.
  • the method for determining the first time correction coefficient ⁇ t1 includes:
  • the difference between the time when the upper heating device starts heating and the time when the temperature at which the condensed water adheres to changes from falling to rising after the heating device starts heating is the first time correction coefficient ⁇ t1.
  • the method for determining the fifth predetermined temperature T5 according to at least the temperature change of the internal temperature T and the temperature change of the controller in the natural cooling state includes:
  • the thermal insulation control method is the thermal insulation control method according to claim 4, and the method for determining the second temperature correction coefficient ⁇ T2 includes:
  • a temperature change amount from a time point t2- ⁇ t2 to a time point t2 in the fourth temperature change curve is obtained, and the temperature change amount is used as the second temperature correction coefficient ⁇ T2.
  • the method for determining the second time correction coefficient ⁇ t2 includes:
  • the difference between the time when the upper heating device starts heating and the time when the controller temperature changes from falling to rising after the heating device starts heating is the second time correction coefficient ⁇ t2.
  • the present invention adopts the following technical solutions:
  • a cooking appliance is controlled using the control method described above.
  • the cooking appliance includes a rice cooker or an electric pressure cooker.
  • the cooking appliance and the heat preservation control method and determination method provided by the present application by controlling the heating method of the upper heating device, can prevent the condensed water from accumulating and flowing into the stream during the heat preservation process. Reduced the maximum temperature and equilibrium temperature of the controller. The maximum temperature decreased by 11.3 ° C, and the equilibrium temperature decreased by 12.7 ° C. The surface morphology of the rice was improved, and the surface was prevented from dripping and drying. At the same time, the insulation used in different situations Different control methods make the cooking effect better, meet the different needs of users, and improve the user experience.
  • FIG. 1 is a schematic diagram showing a working mode of a thermal insulation control method provided by the present invention
  • FIG. 2 illustrates a method for determining a fourth predetermined temperature T4 in the present invention
  • FIG. 3 is a schematic diagram of a method for determining a fifth predetermined temperature T5 in the present invention.
  • FIG. 4 is a schematic diagram of a method for determining a first time correction coefficient ⁇ t1 and a second time correction coefficient ⁇ t2 in the present invention
  • FIG. 5 illustrates a method for determining a first temperature correction coefficient ⁇ T1 in the present invention.
  • FIG. 6 illustrates a method for determining a second temperature correction coefficient ⁇ T2 in the present invention.
  • the present application provides a method for controlling the insulation of a cooking appliance, which includes a controller and
  • the upper heating device which may include a side heating device provided on a side of the cooking appliance body and / or a top heating device located on the top of the cooking appliance body (for example, provided on the appliance cover of the body), preferably,
  • the upper heating device mainly refers to the top heating device located on the top of the body.
  • the thermal insulation control method includes: when the cooking appliance enters a thermal insulation mode, the controller obtains an internal temperature T of the cooking appliance and determines whether the internal temperature T is less than or equal to a first predetermined temperature T1, and if so, Then controlling the cooking appliance to enter the heating phase, otherwise controlling the upper heating device to be turned off until the internal temperature T is less than or equal to a first predetermined temperature T1, controlling the cooking appliance to enter the heating phase, preferably , 85 °C ⁇ T1 ⁇ 110 °C.
  • the internal temperature T of the cooking appliance is detected by a temperature measuring element provided on the cooking appliance.
  • the internal temperature T of the cooking appliance is obtained.
  • T> the first predetermined temperature T1 the current state of the cooking appliance is a hot pot state. No heating for the time being. The higher the internal temperature T and the greater the amount of rice water, the longer the heating period will be stopped. After a period of time, the temperature will gradually decrease until T ⁇ the first predetermined temperature T1. Heating phase. If after the cooking appliance enters the heat preservation mode, T ⁇ the first predetermined temperature T1, which indicates the cold state of the current state of the cooking appliance, the cooking appliance is controlled to directly enter the heating stage.
  • the controller controls the upper heating device to perform heating in a predetermined manner.
  • the predetermined manner includes: the controller controls the upper heating device to perform intermittent heating, for example, the upper heating device is controlled to perform heating at a predetermined duty ratio to control the internal temperature T within a certain temperature range. Specifically, as shown in FIG. 1, when the internal temperature T is greater than a third predetermined temperature T3, the upper heating device is controlled to be turned off until the internal temperature T is less than or equal to a second predetermined temperature T2. The upper heating device is turned on. Among them, 80 ° C ⁇ T2 ⁇ 110 ° C, 80 ° C ⁇ T3 ⁇ 110 ° C.
  • the condensed water on the appliance cover can be dried and evaporated during the operation of the upper heating device to prevent the condensation water from dripping onto the food and causing the phenomenon of "white dripping" (partially rotten rice), and the upper heating device Intermittent heating is used to keep the internal temperature within a certain temperature range, to prevent food from drying out, and to reduce the maximum temperature and equilibrium temperature of the controller.
  • a power supply voltage of the cooking appliance or an actual voltage of an electric device of the cooking appliance is detected (because the power supply voltage has a linear relationship with the actual voltage of the electric device).
  • the electric device may be, for example, an upper part.
  • the heating device adjusts the heating power of the upper heating device according to the power supply voltage or the actual voltage.
  • the heating duty of the upper heating device can be adjusted according to the actual voltage to adjust the heating power to achieve a power similar to the design power. Effect, the heating duty cycle is the ratio of the heating duration of the upper heating device to the duration of heating stop during a heating cycle. The larger the actual voltage, the smaller the heating duty ratio.
  • the upper heating device when When the power supply voltage is less than or equal to the first predetermined voltage value, the upper heating device is controlled to perform heating with the first predetermined heating duty ratio.
  • the power supply voltage is greater than the first predetermined voltage value and less than or equal to the second predetermined voltage value, the upper heating device is controlled.
  • the device is heated at a second predetermined heating duty cycle.
  • the upper heating device is controlled to perform heating with a third predetermined heating duty ratio, wherein the first predetermined voltage value is smaller than the second predetermined voltage value, and the ratio of the first predetermined heating duty ratio> the second predetermined heating duty ratio The ratio of is> the ratio of the third predetermined heating duty cycle.
  • the first predetermined voltage value is preferably 200 to 220V, further preferably 209V
  • the second predetermined voltage value is preferably 220 to 240V, further preferably 231V
  • the first predetermined heating duty ratio is preferably (8-10s): (22- 24s), further preferably 9s: 23s
  • the second predetermined heating duty cycle is preferably (6-8s): (24-26s), further preferably 7s: 25s
  • the third predetermined heating duty cycle is preferably (4- 6s): (26-28s), more preferably 5s: 27s.
  • the above-mentioned first predetermined temperature T1 may be set according to empirical values.
  • the present application also provides a determination method for determining the first predetermined temperature T1 in the thermal insulation control method described above.
  • the range of the first predetermined temperature T1 is [T4, T5], T5 is the fifth predetermined temperature, which is the upper limit of the optional range of the first predetermined temperature T1, and is mainly affected by the preheating of the upper heating device in the rice / congee stage.
  • T4 is the fourth predetermined temperature and is the lower limit of the optional range of the first predetermined temperature T1, which is mainly affected by the degree of condensation of condensed water during natural cooling.
  • the determination method includes: at least according to the internal conditions in the natural cooling state
  • the fourth predetermined temperature T4 is determined by the temperature change of the temperature T and the temperature change of the condensate attachment place on the appliance cover of the cooking appliance; at least according to the temperature change of the internal temperature T in the natural cooling state and The temperature change of the controller determines the fifth predetermined temperature T5.
  • the method for determining the fourth predetermined temperature T4 includes:
  • the first point whose temperature is lower than the predetermined condensation temperature is obtained as the condensation characteristic point, and at this condensation characteristic point, the condensed water is obviously condensed and can be gathered into a stream when the cover is opened.
  • the temperature value T4 ′ corresponding to the time point t1 corresponding to the condensation characteristic point in the first temperature change curve may be obtained, and the temperature value T4 ′ may be used as the fourth predetermined temperature T4.
  • the fourth predetermined temperature T4 T4 '+ ⁇ T1
  • ⁇ T1 is the first temperature correction coefficient.
  • the method for determining the first temperature correction coefficient ⁇ T1 includes:
  • a temperature change amount from a time point t1- ⁇ t1 to a time point t1 in the second temperature change curve is obtained, and the temperature change amount is used as the first temperature correction coefficient ⁇ T1.
  • the first time correction coefficient ⁇ t1 may be an empirical value.
  • the upper heating device starts heating time and the condensed water adheres to the heating device after the heating device starts heating
  • the difference between the time points when the temperature changes from falling to rising is the first time correction coefficient ⁇ t1.
  • the heating device is controlled to be turned on at a specific time point. Obtaining a third temperature change curve of the condensed water attachment on the appliance cover of the cooking appliance during the process;
  • the time point corresponding to the turning point where the temperature changes from falling to rising for the first time is obtained as the first time point; the time point when the upper heating device starts heating is obtained as the second time point; After heating, there is a delay in the temperature rise of the condensed water, so the first time point is different from the second time point, and the difference between the first time point and the second time point is used as the first time correction coefficient ⁇ t1.
  • the method for determining the fifth predetermined temperature T5 includes:
  • the slope of each point in the fourth temperature change curve as k2, and in the temperature drop section of the fourth temperature change curve, take the first point
  • the temperature of the controller starts to drop obviously, and the temperature value T5 'corresponding to the time point t2 corresponding to the temperature drop characteristic point in the first temperature change curve can be obtained, and the temperature value T5' can be used as the
  • the method for determining the second temperature correction coefficient ⁇ T2 includes:
  • a temperature change amount from a time point t2- ⁇ t2 to a time point t2 in the fourth temperature change curve is obtained, and the temperature change amount is used as the second temperature correction coefficient ⁇ T2.
  • the first time correction coefficient ⁇ t1 may be an empirical value.
  • the time when the upper heating device starts heating and the temperature of the controller after the heating device starts heating are determined by The difference between the time points when falling and rising becomes the second time correction coefficient ⁇ t2.
  • the heating device is controlled to be turned on at a specific time point, and a fifth temperature change curve of the controller is acquired in the process;
  • the time point corresponding to the turning point where the temperature changes from falling to rising for the first time is obtained as the third time point; the time point when the upper heating device starts heating is obtained as Second time point; after the upper heating device starts heating, there is a delay in the temperature increase of the controller, so the third time point is different from the second time point, and the difference between the third time point and the second time point As the second time correction coefficient ⁇ t2.
  • Determining the first predetermined temperature T1 by this determination method can not only ensure that the condensed water does not collect, but white dripping does not occur, and at the same time, ensure that the temperature of the controller is not too high, and the service life is extended.
  • the application also provides a cooking appliance, which is controlled by using the control method described above.
  • the cooking appliance includes a rice cooker or an electric pressure cooker.

Abstract

一种烹饪器具及其保温控制方法、确定方法,保温控制方法包括:在烹饪器具进入保温模式时,控制器获取烹饪器具的内部温度T,并判断内部温度T是否小于或等于第一预定温度T1,若是,则控制烹饪器具进入加热阶段,否则控制上部加热装置处于关闭状态,直至内部温度T小于或等于第一预定温度T1时,控制烹饪器具进入加热阶段,在加热阶段,控制器控制上部加热装置按预定方式进行加热。本保温控制方法,通过控制上部加热装置的加热方式,使保温过程中不会出现冷凝水明显聚集、成股流下的情况,并且与现行方式相比,显著降低了控制器的最高温度与平衡温度,改善了米饭表面形态,避免了表面出现滴白、干硬的情况。

Description

烹饪器具及其保温控制方法、确定方法
本申请要求于2018年9月30日提交中国专利局、申请号为201811160653.0、发明名称为“烹饪器具及其保温控制方法、确定方法”的中国专利申请的优先权,其全部内容通过引用结合在本申请中。
技术领域
本发明涉及厨房电器技术领域,特别是一种烹饪器具及其保温控制方法、确定方法。
背景技术
用户在使用电饭煲时,有时会需要进行长时间保温,一种是在用户使用电饭煲煮饭/煮粥后直接进行保温,另一种为非热锅状态下进行保温,进行长时间保温的过程中,饭煲上盖会形成大量冷凝水,一方面冷凝水滴在米饭上会导致出现“滴白”(局部烂饭)的情况;另一方面冷凝水在开盖时会汇聚成股流至支撑环上,降低用户体验。
因此,市售电饭煲普遍采用顶部发热丝加热,烘干盖板上的冷凝水。但在此过程中产生了一个矛盾,冷凝水的烘干效果越好,控制器的温度越高,寿命越短。此外,现有电饭煲在保温阶段均进行同样的控制,未对不同情况下的保温进行适应性调整。
发明内容
有鉴于此,本发明的目的之一在于提供一种烹饪器具及其保温控制方法、确定方法,以解决长时间保温过程中未对不同情况下的保温进行适应性调整的问题。
为达到上述目的,一方面,本发明采用如下技术方案:
一种烹饪器具的保温控制方法,所述烹饪器具包括控制器和上部加热装置,所述保温控制方法包括:
在所述烹饪器具进入保温模式时,所述控制器获取所述烹饪器具的内部温度T,并判断所述内部温度T是否小于或等于第一预定温度T1,若是,则控制所述烹饪器具进入加热阶段,否则控制所述上部加热装置处于关闭状态,直至所述内部温度T小于或等于第一预定温度T1时,控制所述烹饪器具进入所述加热阶段,
其中,在所述加热阶段,所述控制器控制所述上部加热装置按预定方式进行加热。
优选地,85℃≤T1≤110℃。
优选地,所述预定方式包括:
所述控制器控制所述上部加热装置间歇加热。
优选地,控制所述上部加热装置间歇加热的方法包括:
当所述内部温度T大于第三预定温度T3时,控制所述上部加热装置处于关闭状态,直至所述内部温度T小于或等于第二预定温度T2时,控制所述上部加热装置开启。
优选地,80℃≤T2≤110℃;和/或,
80℃≤T3≤110℃。
优选地,在所述加热阶段,检测所述烹饪器具的电源电压或者所述烹饪器具的用电器件的实际电压,根据所述实际电压调整所述上部加热装置的加热功率。
另一方面,本发明采用如下技术方案:
一种确定方法,用于确定如上所述的保温控制方法中的第一预定温度T1,所述第一预定温度T1的范围为[T4,T5],T4为第四预定温度,T5为第五预定温度,
所述确定方法包括:
至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述烹饪器具的器具盖上的冷凝水附着处的温度变化情况确定所述第四预定温度T4;和/或,
至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述控制器的温度变化情况确定所述第五预定温度T5。
优选地,至少根据在自然冷却状态下所述内部温度T的温度变化情 况和所述烹饪器具的器具盖上的冷凝水附着处的温度变化情况确定所述第四预定温度T4的方法包括:
获取在自然冷却状态下所述内部温度T的第一温度变化曲线;
获取在自然冷却状态下所述烹饪器具的器具盖上的冷凝水附着处的第二温度变化曲线;
在所述第二温度变化曲线的温度下降段中,获取首个温度低于预定冷凝温度的点作为凝聚特征点,获取该凝聚特征点对应的时间点t1在所述第一温度变化曲线中所对应的温度值T4’,
将温度值T4’作为所述第四预定温度T4,或者,第四预定温度T4=T4’+ΔT1,ΔT1为第一温度修正系数。
优选地,所述保温控制方法为如权利要求4所述的保温控制方法,所述第一温度修正系数ΔT1的确定方法包括:
确定第一时间修正系数Δt1;
获取在第二温度变化曲线中,由时间点t1-Δt1至时间点t1的温度变化量,将该温度变化量作为所述第一温度修正系数ΔT1。
优选地,确定第一时间修正系数Δt1的方法包括:
烹饪器具在进入保温模式后,上部加热装置开始加热时间点与所述加热装置开始加热后冷凝水附着处温度由下降变为上升的时间点之差即为所述第一时间修正系数Δt1。
优选地,至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述控制器的温度变化情况确定所述第五预定温度T5的方法包括:
获取在自然冷却状态下所述内部温度T的第一温度变化曲线;
获取在自然冷却状态下所述控制器的第四温度变化曲线;
将第四温度变化曲线中各点的斜率定义为k2,在所述第四温度变化曲线的温度下降段中,取首个|k2|≥第一预定斜率k2’的点作为温度下降特征点,获取该温度下降特征点对应的时间点t2在所述第一温度变化曲线中所对应的温度值T5’,
将温度值T5’作为所述第五预定温度T5,或者,第五预定温度T5=T5’+ΔT2,ΔT2为第二温度修正系数。
优选地,所述保温控制方法为如权利要求4所述的保温控制方法, 所述第二温度修正系数ΔT2的确定方法包括:
确定第二时间修正系数Δt2;
获取在第四温度变化曲线中,由时间点t2-Δt2至时间点t2的温度变化量,将该温度变化量作为所述第二温度修正系数ΔT2。
优选地,确定第二时间修正系数Δt2的方法包括:
烹饪器具在进入保温模式后,上部加热装置开始加热时间点与所述加热装置开始加热后控制器温度由下降变为上升的时间点之差即为所述第二时间修正系数Δt2。
再一方面,本发明采用如下技术方案:
一种烹饪器具,采用如上所述的控制方法进行控制。
优选地,所述烹饪器具包括电饭煲或电压力锅。
本申请提供的烹饪器具及其保温控制方法、确定方法,通过控制上部加热装置的加热方式,使保温过程中不会出现冷凝水明显聚集、成股流下的情况,并且与现行方式相比,显著降低了控制器的最高温度与平衡温度,最高温度下降了11.3℃,平衡温度下降了12.7℃,改善了米饭表面形态,避免了表面出现滴白、干硬的情况,同时不同情况下的保温采用不同的控制方法,使得烹饪效果更好,满足用户的不同使用需求,提升用户体验。
附图说明
通过以下参照附图对本发明实施例的描述,本发明的上述以及其它目的、特征和优点将更为清楚,在附图中:
图1示出本发明提供的保温控制方法的工作方式示意图;
图2示出本发明中确定第四预定温度T4的方法示意图;
图3示出本发明中确定第五预定温度T5的方法示意图;
图4示出本发明中确定第一时间修正系数Δt1和第二时间修正系数Δt2的方法示意图;
图5示出本发明中确定第一温度修正系数ΔT1的方法示意图。
图6示出本发明中确定第二温度修正系数ΔT2的方法示意图。
具体实施方式
以下基于实施例对本发明进行描述,但是本发明并不仅仅限于这些实施例。为了避免混淆本发明的实质,公知的方法、过程、流程、元件并没有详细叙述。
此外,本领域普通技术人员应当理解,在此提供的附图都是为了说明的目的,并且附图不一定是按比例绘制的。
除非上下文明确要求,否则整个说明书和权利要求书中的“包括”、“包含”等类似词语应当解释为包含的含义而不是排他或穷举的含义;也就是说,是“包括但不限于”的含义。
在本发明的描述中,需要理解的是,术语“第一”、“第二”等仅用于描述目的,而不能理解为指示或暗示相对重要性。
现有的烹饪器具例如电饭煲、电压力锅等在长时间保温过程中,器具盖上往往会形成大量冷凝水,一方面冷凝水滴在食物上会导致出现“滴白”(局部烂饭)的情况,另一方面冷凝水在开盖时会汇聚成股流至支撑环上,降低用户体验,为了解决这一问题,本申请提供了一种烹饪器具的保温控制方法,所述烹饪器具包括控制器和上部加热装置,此处的上部加热装置可以包括设置在烹饪器具本体侧部的侧部加热装置和/或位于烹饪器具本体顶部(例如设置在本体的器具盖上)的顶部加热装置,优选地,上部加热装置主要指位于本体顶部的顶部加热装置。所述保温控制方法包括:在所述烹饪器具进入保温模式时,所述控制器获取所述烹饪器具的内部温度T,并判断所述内部温度T是否小于或等于第一预定温度T1,若是,则控制所述烹饪器具进入加热阶段,否则控制所述上部加热装置处于关闭状态,直至所述内部温度T小于或等于第一预定温度T1时,控制所述烹饪器具进入所述加热阶段,优选地,85℃≤T1≤110℃。
其中,烹饪器具的内部温度T由设置在所述烹饪器具上的测温元件检测得到。
具体地,所述烹饪器具在进入保温模式时,参照图1,获取烹饪器具的内部温度T,此时,若T>第一预定温度T1,则说明当前烹饪器具的状态为热锅状态,此时暂不加热,内部温度T越高、米水量越大,则 停止加热阶段的时间越长,过一段时间后,温度逐渐降低,直到T≤第一预定温度T1时,控制所述烹饪器具进入加热阶段。若烹饪器具在进入保温模式后,T≤第一预定温度T1,说明烹饪器具当前的状态的冷锅状态,则控制所述烹饪器具直接进入加热阶段。
进一步地,在所述加热阶段,所述控制器控制所述上部加热装置按预定方式进行加热。其中,所述预定方式包括:所述控制器控制所述上部加热装置进行间歇加热,例如控制上部加热装置以预定占空比进行加热,以将所述内部温度T控制在一定温度范围内。具体地,如图1所示,当所述内部温度T大于第三预定温度T3时,控制所述上部加热装置处于关闭状态,直至所述内部温度T小于或等于第二预定温度T2时,控制所述上部加热装置开启。其中,80℃≤T2≤110℃,80℃≤T3≤110℃。可以理解的是,由于所述上部加热装置在开始加热或停止加热时,对内部温度T的影响存在延迟,所以当T≤T2,上部加热装置开始加热后,内部温度T仍会有小幅下降,当T≥T3,上部加热装置停止加热后,内部温度T仍会有小幅上升。
通过设置上部加热装置,使得上部加热装置工作时可以将器具盖上的冷凝水烘干蒸发,避免冷凝水聚集滴到食物上,出现“滴白”(局部烂饭)的现象,并且上部加热装置采用间歇加热的方式,使得内部温度保持在一定温度范围内,避免食物干硬,同时显著降低了控制器的最高温度与平衡温度。
进一步地,在所述加热阶段,检测所述烹饪器具的电源电压或者烹饪器具的用电器件的实际电压(因为电源电压与用电器件的实际电压呈线性关系),用电器件例如可以是上部加热装置,根据所述电源电压或者实际电压调整所述上部加热装置的加热功率,例如,可以根据实际电压调整上部加热装置的加热占空比,以调整加热功率,从而达到与设计的功率相近的效果,加热占空比为在一个加热循环中上部加热装置加热持续时长与停止加热持续时长之比,实际电压越大,则加热占空比的比值越小,在一个具体的实施例中,当电源电压小于或等于第一预定电压值时,控制上部加热装置以第一预定加热占空比进行加热,当电源电压大于第一预定电压值且小于或等于第二预定电压值时,控制上部加热装置 以第二预定加热占空比进行加热,当电源电压大于第二预定电压值时,控制上部加热装置以第三预定加热占空比进行加热,其中,第一预定电压值小于第二预定电压值,第一预定加热占空比的比值>第二预定加热占空比的比值>第三预定加热占空比的比值。第一预定电压值优选为200至220V,进一步优选为209V,第二预定电压值优选为220至240V,进一步优选为231V,第一预定加热占空比优选地(8-10s):(22-24s),进一步优选为9s:23s,第二预定加热占空比优选为(6-8s):(24-26s),进一步优选为7s:25s,第三预定加热占空比优选为(4-6s):(26-28s),进一步优选为5s:27s。
上述的第一预定温度T1可以是根据经验值进行设定,优选地,为实现精确控制,本申请还提供一种确定方法,用于确定如上所述的保温控制方法中的第一预定温度T1,所述第一预定温度T1的范围为[T4,T5],T5为第五预定温度,为第一预定温度T1可选范围上限,主要受煮饭/煮粥阶段上部加热装置的预热影响,T4为第四预定温度,为第一预定温度T1可选范围下限,主要受自然冷却时冷凝水凝聚程度的影响,基于此,所述确定方法包括:至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述烹饪器具的器具盖上的冷凝水附着处的温度变化情况确定所述第四预定温度T4;至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述控制器的温度变化情况确定所述第五预定温度T5。
具体地,参考图2,确定所述第四预定温度T4的方法包括:
获取在自然冷却状态(即不开启上部加热装置,让烹饪器具内部自然冷却)下所述内部温度T的第一温度变化曲线,其中内部温度T是一直下降的;
获取在自然冷却状态下所述烹饪器具的器具盖上的冷凝水附着处的第二温度变化曲线,由于上部加热装置停止加热后还具有余热,所以冷凝水在自然冷却状态下温度还会有小幅升高,之后开始下降;
在所述第二温度变化曲线的温度下降段中,获取首个温度低于预定冷凝温度的点作为凝聚特征点,在该凝聚特征点,冷凝水明显凝聚,开盖时可汇聚成股流下,获取该凝聚特征点对应的时间点t1在所述第一温度变化曲线中所对应的温度值T4’,可以将温度值T4’作为所述第四预定 温度T4,由于上部加热装置工作后对冷凝水的影响存在延迟,因此,优选地,第四预定温度T4=T4’+ΔT1,ΔT1为第一温度修正系数。
如图5所示,所述第一温度修正系数ΔT1的确定方法包括:
确定第一时间修正系数Δt1;
获取在第二温度变化曲线中,由时间点t1-Δt1至时间点t1的温度变化量,将该温度变化量作为所述第一温度修正系数ΔT1。
其中,第一时间修正系数Δt1可以为一经验值,为了提高控制精确性,优选地,烹饪器具在进入保温模式后,上部加热装置开始加热时间点与所述加热装置开始加热后冷凝水附着处温度由下降变为上升的时间点之差即为所述第一时间修正系数Δt1,具体地,如图4所示,在烹饪器具进入保温模式后,在一特定的时间点控制加热装置开启,获取该过程中,烹饪器具的器具盖上的冷凝水附着处的第三温度变化曲线;
在第三温度变化曲线中,获取温度首次由下降变为上升的转折点对应的时间点作为第一时间点;获取所述上部加热装置开始加热的时间点作为第二时间点;在上部加热装置开始加热后,对冷凝水的温度提升存在延迟,所以第一时间点与第二时间点不同,将所述第一时间点与所述第二时间点之差作为所述第一时间修正系数Δt1。
另一方面,如图3所示,确定所述第五预定温度T5的方法包括:
获取在自然冷却状态下所述内部温度T的第一温度变化曲线,其中内部温度T是一直下降的;
获取在自然冷却状态下所述控制器的第四温度变化曲线,由于上部加热装置停止加热后还具有余热,所以控制器在自然冷却状态下温度还会有小幅升高,之后开始下降;
将第四温度变化曲线中各点的斜率定义为k2,在所述第四温度变化曲线的温度下降段中,取首个|k2|≥第一预定斜率k2’的点作为温度下降特征点,在该温度下降特征点,控制器温度开始明显下降,获取该温度下降特征点对应的时间点t2在所述第一温度变化曲线中所对应的温度值T5’,可以将温度值T5’作为所述第五预定温度T5,由于上部加热装置工作后对控制器的影响存在延迟,因此,优选地,第五预定温度T5=T5’+ΔT2,ΔT2为第二温度修正系数。
如图6所示,所述第二温度修正系数ΔT2的确定方法包括:
确定第二时间修正系数Δt2;
获取在第四温度变化曲线中,由时间点t2-Δt2至时间点t2的温度变化量,将该温度变化量作为所述第二温度修正系数ΔT2。
其中,第一时间修正系数Δt1可以为一经验值,为了提高控制精确性,优选地,烹饪器具在进入保温模式后,上部加热装置开始加热时间点与所述加热装置开始加热后控制器温度由下降变为上升的时间点之差即为所述第二时间修正系数Δt2。具体地,如图4所示,在烹饪器具进入保温模式后,在一特定的时间点控制加热装置开启,获取该过程中,控制器的第五温度变化曲线;
根据所述第五温度变化曲线在所述第五温度变化曲线中,获取温度首次由下降变为上升的转折点对应的时间点作为第三时间点;获取所述上部加热装置开始加热的时间点作为第二时间点;在上部加热装置开始加热后,对控制器的温度提升存在延迟,所以第三时间点与第二时间点不同,将所述第三时间点与所述第二时间点之差作为所述第二时间修正系数Δt2。
通过该确定方法确定第一预定温度T1,不仅能够保证冷凝水不聚集,不会发生滴白现象,同时保证控制器的温度不会过高,延长使用寿命。
本申请还提供一种烹饪器具,采用如上所述的控制方法进行控制。具体地,所述烹饪器具包括电饭煲或电压力锅。
本领域的技术人员容易理解的是,在不冲突的前提下,上述各优选方案可以自由地组合、叠加。
应当理解,上述的实施方式仅是示例性的,而非限制性的,在不偏离本发明的基本原理的情况下,本领域的技术人员可以针对上述细节做出的各种明显的或等同的修改或替换,都将包含于本发明的权利要求范围内。

Claims (15)

  1. 一种烹饪器具的保温控制方法,其特征在于,所述烹饪器具包括控制器和上部加热装置,所述保温控制方法包括:
    在所述烹饪器具进入保温模式时,所述控制器获取所述烹饪器具的内部温度T,并判断所述内部温度T是否小于或等于第一预定温度T1,若是,则控制所述烹饪器具进入加热阶段,否则控制所述上部加热装置处于关闭状态,直至所述内部温度T小于或等于第一预定温度T1时,控制所述烹饪器具进入所述加热阶段,
    其中,在所述加热阶段,所述控制器控制所述上部加热装置按预定方式进行加热。
  2. 根据权利要求1所述的保温控制方法,其特征在于,85℃≤T1≤110℃。
  3. 根据权利要求1所述的保温控制方法,其特征在于,所述预定方式包括:
    所述控制器控制所述上部加热装置进行间歇加热。
  4. 根据权利要求3所述的保温控制方法,其特征在于,控制所述上部加热装置进行间歇加热的方法包括:
    当所述内部温度T大于第三预定温度T3时,控制所述上部加热装置处于关闭状态,直至所述内部温度T小于或等于第二预定温度T2时,控制所述上部加热装置开启,第二预定温度T2<第三预定温度T3。
  5. 根据权利要求3所述的保温控制方法,其特征在于,80℃≤T2≤110℃;和/或,
    80℃≤T3≤110℃。
  6. 根据权利要求1至5之一所述的保温控制方法,其特征在于,在 所述加热阶段,检测所述烹饪器具的电源电压或者所述烹饪器具的用电器件的实际电压,根据所述实际电压调整所述上部加热装置的加热功率。
  7. 一种确定方法,用于确定如权利要求1至6之一所述的保温控制方法中的第一预定温度T1,其特征在于,
    所述第一预定温度T1的范围为[T4,T5],T4为第四预定温度,T5为第五预定温度,
    所述确定方法包括:
    至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述烹饪器具的器具盖上的冷凝水附着处的温度变化情况确定所述第四预定温度T4;和/或,
    至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述控制器的温度变化情况确定所述第五预定温度T5。
  8. 根据权利要求7所述的确定方法,其特征在于,至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述烹饪器具的器具盖上的冷凝水附着处的温度变化情况确定所述第四预定温度T4的方法包括:
    获取在自然冷却状态下所述内部温度T的第一温度变化曲线;
    获取在自然冷却状态下所述烹饪器具的器具盖上的冷凝水附着处的第二温度变化曲线;
    在所述第二温度变化曲线的温度下降段中,获取首个温度低于预定冷凝温度的点作为凝聚特征点,获取该凝聚特征点对应的时间点t1在所述第一温度变化曲线中所对应的温度值T4’,
    将温度值T4’作为所述第四预定温度T4,或者,第四预定温度T4=T4’+ΔT1,ΔT1为第一温度修正系数。
  9. 根据权利要求8所述的确定方法,其特征在于,所述第一温度修正系数ΔT1的确定方法包括:
    确定第一时间修正系数Δt1;
    获取在第二温度变化曲线中,由时间点t1-Δt1至时间点t1的温 度变化量,将该温度变化量作为所述第一温度修正系数ΔT1。
  10. 根据权利要求9所述的确定方法,其特征在于,确定第一时间修正系数Δt1的方法包括:
    烹饪器具在进入保温模式后,上部加热装置开始加热时间点与所述加热装置开始加热后冷凝水附着处温度由下降变为上升的时间点之差即为所述第一时间修正系数Δt1。
  11. 根据权利要求7所述的确定方法,其特征在于,至少根据在自然冷却状态下所述内部温度T的温度变化情况和所述控制器的温度变化情况确定所述第五预定温度T5的方法包括:
    获取在自然冷却状态下所述内部温度T的第一温度变化曲线;
    获取在自然冷却状态下所述控制器的第四温度变化曲线;
    将第四温度变化曲线中各点的斜率定义为k2,在所述第四温度变化曲线的温度下降段中,取首个|k2|≥第一预定斜率k2’的点作为温度下降特征点,获取该温度下降特征点对应的时间点t2在所述第一温度变化曲线中所对应的温度值T5’,
    将温度值T5’作为所述第五预定温度T5,或者,第五预定温度T5=T5’+ΔT2,ΔT2为第二温度修正系数。
  12. 根据权利要求11所述的确定方法,其特征在于,所述保温控制方法为如权利要求4所述的保温控制方法,所述第二温度修正系数ΔT2的确定方法包括:
    确定第二时间修正系数Δt2;
    获取在第四温度变化曲线中,由时间点t2-Δt2至时间点t2的温度变化量,将该温度变化量作为所述第二温度修正系数ΔT2。
  13. 根据权利要求12所述的确定方法,其特征在于,确定第二时间修正系数Δt2的方法包括:
    烹饪器具在进入保温模式后,上部加热装置开始加热时间点与所述 加热装置开始加热后控制器温度由下降变为上升的时间点之差即为所述第二时间修正系数Δt2。
  14. 一种烹饪器具,其特征在于,采用如权利要求1至6之一所述的控制方法进行控制。
  15. 根据权利要求14所述的烹饪器具,其特征在于,所述烹饪器具包括电饭煲或电压力锅。
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