WO2020078010A1 - 一种水位控制智能电饭锅 - Google Patents

一种水位控制智能电饭锅 Download PDF

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Publication number
WO2020078010A1
WO2020078010A1 PCT/CN2019/089865 CN2019089865W WO2020078010A1 WO 2020078010 A1 WO2020078010 A1 WO 2020078010A1 CN 2019089865 W CN2019089865 W CN 2019089865W WO 2020078010 A1 WO2020078010 A1 WO 2020078010A1
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Prior art keywords
pot body
inner pot
rice cooker
rice
heating
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PCT/CN2019/089865
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English (en)
French (fr)
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吴先锋
李桂玉
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李桂玉
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Publication of WO2020078010A1 publication Critical patent/WO2020078010A1/zh

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    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/32—Time-controlled igniting mechanisms or alarm devices
    • A47J36/321—Time-controlled igniting mechanisms or alarm devices the electronic control being performed over a network, e.g. by means of a handheld device
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels
    • A47J36/32—Time-controlled igniting mechanisms or alarm devices
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/002—Construction of cooking-vessels; Methods or processes of manufacturing specially adapted for cooking-vessels
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J27/00—Cooking-vessels
    • A47J27/004—Cooking-vessels with integral electrical heating means
    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47J—KITCHEN EQUIPMENT; COFFEE MILLS; SPICE MILLS; APPARATUS FOR MAKING BEVERAGES
    • A47J36/00—Parts, details or accessories of cooking-vessels

Definitions

  • This application relates to the field of smart home technology, in particular to a water level control smart rice cooker.
  • the rice cooker can automatically end the rice cooking process after adding rice and water. Its implementation includes two types, one is a temperature-sensitive switch, and the other is a timer. Among them, the temperature-sensitive switch is made of soft magnetic materials such as ferrite. If the temperature in the rice cooker exceeds 100 ° C (generally 103 ° C), the temperature-sensitive soft magnetic material loses its magnetism and the temperature-sensitive switch is automatically turned off , Stop heating. It can be seen that when the temperature sensing switch is automatically turned off depends on the amount of rice and water added in the pot. If the amount of rice and water added in the pot is large, the cooking time of the rice cooker will be extended. Moreover, the existing rice cooker cannot determine how long it takes to complete the rice cooking process, that is, when the cooked rice is cooked. Therefore, rice cookers using temperature-sensitive switches generally do not have a reservation function.
  • the existing rice cooker uses a timer to determine the cooking time of the rice. That is to say, in practical applications, different types of rice are set with different cooking time, for example, the time of ordinary firewood rice is 60 minutes, and the time of fast cooking rice is 40 minutes. After the user selects the type of rice, the rice cooker starts to heat. After the preset time, the heating is stopped and the cooking process is ended. Therefore, the cooking time of the rice can be determined, which is convenient for the appointment function.
  • the cooking time of each rice type is fixed.
  • the rice cooker still consumes the same cooking time.
  • the amount of rice added by the user is 200 g
  • the cooking time of the rice cooker is 60 min
  • the cooking time of the rice cooker is also 60 min. This makes the cooking time too long when the amount of rice added is small, and conversely when the amount of rice added is large, the cooking time is too short.
  • the cooking time of the rice cooker should be set as long as possible, generally greater than the cooking time of the maximum amount of rice. Therefore, the rice cooker using a timer not only wastes energy, but also affects the taste of rice.
  • This application provides a water level control intelligent rice cooker to solve the problems that traditional rice cookers cannot accurately determine the cooking time and waste energy.
  • This application is a water level control intelligent electric rice cooker, which includes a pot body, a pot cover and an inner pot body, the pot body includes a U-shaped heating cavity, the inner pot body is detachably disposed in the heating cavity, and the pot cover Hinged on one side of the pot body, covering the top of the pot body; wherein, the top of the pot body is provided with a stepped portion carrying the inner pot body, and a load cell is provided on the stepped portion to Detecting the weight of the inner pot body and the ingredients in the inner pot body;
  • a water level detection device is provided on the bottom surface of the pot lid, and the water level detection device includes a floating block and a distance detection mechanism connected to the floating block; the material density of the floating block is less than the density of water to float within the Detecting the volume of ingredients in the inner pot body on the water surface contained in the pot body;
  • the smart rice cooker further includes a controller, which is connected to the weighing sensor, the distance detection mechanism and the heating chamber respectively; the controller receives the weight sensor and the distance detection mechanism by receiving Detecting data, calculating the amount of rice and water in the inner pot body, and controlling the running time of the heating chamber according to the calculated amount of rice and water.
  • the weight of the ingredients in the inner pot body is detected by the weighing sensor, and the volume of the ingredients in the inner pot body is detected by the water level detection device, and the amount of water and rice in the inner pot body is calculated by the controller. Then, according to the calculated water amount and rice amount, the time required for cooking the ingredients in the inner pot body is determined, so that the heating cavity is controlled to be heated according to the determined time.
  • the intelligent rice cooker provided by the present application can determine the heating time according to the amount of ingredients in the inner pot body, which can save energy to the greatest extent, and can accurately calculate the cooking time and the mature time of the rice, which is convenient for realizing the appointment function.
  • FIG. 1 is a schematic structural diagram of an intelligent rice cooker with water level control according to the present application
  • FIG. 3 is a schematic structural diagram of the open state of the lid of the smart rice cooker described in this application.
  • FIG. 4 is a cross-sectional view of an example of the intelligent rice cooker described in this application.
  • FIG. 5 is a schematic diagram of the connection between the smart rice cooker and the smart terminal described in this application.
  • the food ingredients refer to water and rice used for making rice.
  • This application uses rice and water as food materials as an example to explain related solutions.
  • the food materials may include other types of food materials according to different types of rice and dietary habits.
  • FIG. 1 is a schematic structural diagram of an intelligent rice cooker with water level control according to the present application.
  • FIG. 2 which is a cross-sectional view of an intelligent rice cooker of the present application.
  • the water level control intelligent rice cooker provided by the present application includes a pot body 1, a pot cover 2 and an inner pot body 3.
  • the pot body 1 may be a shell structure made of a heat-resistant non-metallic material (such as plastic), which has a cavity containing heating components and other electronic components inside.
  • the pot body 1 includes a U-shaped heating cavity 4, the heating cavity 4 may be provided with a U-shaped groove on the pot body 1, and the heating component of the heating cavity 4 may be an electric heating method or an eddy current magnetic field induction method.
  • the heating cavity 4 can be made of a metal material with good thermal conductivity.
  • the resistance wire can be arranged at the bottom of the heating cavity 4 to save the internal space of the pot body 1; it can also be arranged in the heating cavity 4 Bottom and sides for more efficient heating.
  • the inner pot body 3 is detachably disposed in the heating cavity 4, and the inner pot body 3 can be taken out of the heating cavity 4.
  • the inner pot body 3 can be a pot-shaped structure made of metal material, including A cavity containing food ingredients and a pot edge arranged on the top edge of the cavity.
  • the shape of the inner pot body 3 and the heating cavity 4 are adapted, that is, the gap between the inner pot body 3 and the heating cavity 4 is reduced as much as possible.
  • the pot lid 2 is hinged to one side of the pot body 1, covering the top of the pot body 1, and the pot lid 2 is used to provide a sealing effect, by covering the top of the pot body 1, the evaporation of water in the inner pot body 3 is reduced, and the inner pot is maintained The temperature inside the body 3 to cook the rice.
  • the pot cover 2 is used to provide a sealing effect, and may be hinged on the top of the pot body 1 or may be an independent cover body separated from the pot body 1.
  • the form in which the pot cover 2 is hinged to the pot body 1 is preferred.
  • the user first adds water and rice to the inner pot body 3, then places the inner pot body 3 in the heating cavity 4, and finally covers the pot cover 2 on the top of the pot body.
  • the smart rice cooker in order to complete the cooking process of the rice, the smart rice cooker also needs to be controlled by human operation, that is, the smart rice cooker further includes a control panel, and the control panel may be provided on the top surface of the lid 2 , Can also be set on the pot body 1.
  • the control panel can be used to select the working mode, such as cooking rice, porridge, etc., and can also be used to set the appointment time. Therefore, multiple buttons with different functions can be integrated on the control panel for the user to select the mode.
  • a step portion 11 carrying an inner pot body 3 is provided on the top of the pot body 1, and a weighing sensor 12 is provided on the step portion 11 to detect the weight of the inner pot body 3 and the ingredients in the inner pot body 3 .
  • the stepped portion 11 is used to carry the inner pot body 3, and may be an annular stepped structure, which is provided at the opening of the heating chamber 4.
  • the stepped portion 11 includes an annular side surface and a bottom surface, wherein the bottom surface of the stepped portion 11 contacts the inner pot body 3, and the side surface is used to restrict the position of the inner pot body 3.
  • the load cell 12 is provided on the bottom surface of the stepped portion 11.
  • the load cell 12 may be a varistor or a sensor chip made of strain gauges. Obviously, since the temperature of the inner pot body 3 is higher during the heating process, the load cell 12 should have a certain high temperature resistance, that is, it will not cause damage under the condition of 100 ° C.
  • the heating method of the heating cavity 4 is magnetic field induction eddy current heating.
  • a ring-shaped electromagnetic eddy current coil is provided at the bottom of the heating cavity 4, thereby generating a high-frequency variable magnetic field to make the metallic inner pot body 3 Heat and heat the food in the inner pot 3.
  • the pot edge of the inner pot body 3 is disposed on the stepped portion 11 so that there is a gap between the inner pot body 3 and the heating cavity 4.
  • the pot of the inner pot body 3 is placed on the bottom surface of the step portion 11 along the bottom contacting the load cell 12, so that the inner pot body 3 is supported by the ring-shaped step portion 11, carrying the entire weight of the inner pot body 3, and the weight sensor 12 Detect the weight of the inner pot body 3.
  • the step portion 11 supports the pot edge portion of the inner pot body 3, so that the gravity of the inner pot body 3 can be fully applied to the load cell 12, even if there is a gap between the inner pot body 3 and the heating cavity 4, The weight detected by the load cell 12 is not affected by the heating chamber 4 and a more accurate detection value is obtained.
  • a water level detection device 5 is provided on the bottom surface of the pot cover 2.
  • the water level detection device 5 can output a corresponding signal according to the position of the liquid level in the inner pot body 3 in order to determine the amount of food ingredients in the inner pot body 3.
  • the water level detection device 5 includes a floating block 51 and a distance detection mechanism 52 connected to the floating block 51.
  • the material density of the floating block 51 is less than the density of water, so as to float on the surface of the water contained in the inner pot body 3, and the volume of the food material in the inner pot body 3 is detected.
  • the floating block 51 may also be a hollow structure so as to float on the water surface.
  • the distance detection mechanism 52 may determine the height of the floating block 51 (or the distance between the floating block 51 and the bottom surface of the pot cover 2), thereby determining the current liquid level height.
  • the rice will sink due to the density being greater than water.
  • the bottom of the water that is, the water will not cross the meter.
  • the volumes corresponding to different heights can be measured and calibrated in advance. Therefore, by detecting the height of the water level in the inner pot body 3, the current rice and water added to the inner pot body 3 can be determined The total volume. Combined with the weight value detected by the weighing sensor 12, after removing the weight of the inner pot body 3, the total mass of the food materials currently contained in the inner pot body 3 can be determined.
  • the ingredients in the inner pot body 3 are generally a mixture of rice and water, the total mass of the ingredients alone cannot determine the quality of the rice and water contained therein, but the density of pure water and the average density of pure rice are known of. Therefore, in the technical solution provided by the present application, by comparing the quality of pure water in the current volume with the total mass of the detected ingredients, the quality and water of the rice contained in the inner pot body 3 can be determined by the quality of. Therefore, the time used to cook these ingredients is determined according to the amount of rice and water.
  • the smart rice cooker further includes a controller 6, and the controller 6 may be a data processing chip that can meet the above calculation requirements, such as a single chip computer, a PLC, and the like.
  • the controller 6 is connected to the load cell 12, the distance detection mechanism 52, and the heating chamber 4, respectively.
  • the controller 6 calculates the amount of rice and water in the inner pot body 3 by receiving the detection data of the weighing sensor 12 and the distance detection mechanism 52, and controls the running time of the heating chamber 4 according to the calculated amount of rice and water.
  • the controller 6 can dynamically generate a control strategy in combination with the mode set by the user on the control panel, and send the control strategy to the heating chamber 4 Drive circuit.
  • the control strategy may include information such as total heating time, heating start time, heating end time, heating power, and power change.
  • a heating method such as a heating part
  • a heating frequency etc. may also be included.
  • the distance detection mechanism 52 includes a connecting rod 521 hinged on the pot cover 2, and an angle sensor provided at the hinge position of the connecting rod 521 522, wherein the angle sensor 522 is connected to the controller 6, so that the controller 6 determines the height of the floating block 51 by detecting the falling angle of the connecting rod 521.
  • the hinge position of the connecting rod 521 on the bottom surface of the pot cover 2 is fixed, the floating block 51 always floats at the water surface position. Therefore, when the height of the floating block 51 is different, the angle between the connecting rod 521 and the bottom surface of the pot cover 2 is also different, that is, the liquid level height can be detected by the angle sensor 522.
  • the angle sensor 522 is used to indirectly detect the liquid level of the inner pot body 3, which can avoid occupying the inner space of the inner pot body 3 when using other types of distance sensors. And, by connecting the rod 521 to the bottom surface of the pot cover 2, when the pot cover 2 is opened, that is, when the pot cover 2 is placed vertically, it can be automatically folded and attached to the bottom surface of the pot cover 2, as shown in FIG. 3; When the pot cover 2 covers the pot body 1, it automatically falls to the water surface position by its own gravity, as shown in FIG. 2. It can be seen that the water level detection device will not affect the user's operation during the entire process.
  • the floating block 51 is a spherical structure fixed on the end of the connecting rod 521.
  • the floating block 51 of the spherical structure can keep the volume of the floating block 51 immersed in the water when the connecting rod 521 is at any angle, that is, when the buoyancy force received is the same, the height is the same, thereby reducing the shape of the floating block 51 Has an impact on the water surface height.
  • the weight of the connecting rod 521 will also indirectly affect the position of the floating block 51. Therefore, in practical applications, the weight of the connecting rod 521 should be as light as possible, for example, lightweight materials such as plastic can be used
  • the connecting rod 521 can be provided as a hollow structure to reduce the weight of the floating block 51 bearing the connecting rod 521.
  • the length of the connecting rod 521 in this embodiment is less than or equal to the depth of the inner pot body 3. At the same time, in order to be able to detect the height of the water surface in more cases.
  • the length of the connecting rod 521 is greater than or equal to 1/2 of the depth of the inner pot body 3.
  • the specific length of the connecting rod 521 can be adjusted according to the design specifications of the inner pot body 3, and details are not described in this application.
  • the distance detection mechanism 52 includes a connecting wire 523, a wire retractor 524, and a pulley 525.
  • one end of the connecting wire 523 is connected to the floating block 51, and the other end is connected to the retractor 524 via the pulley 525.
  • a reel of the connecting wire 523 can be provided inside the retractor 524, and a spring mechanism to maintain the straight state of the connecting wire
  • the elastic mechanism is provided on the reel, and the elastic force provided is smaller than the gravity of the floating block 51, so as to maintain the connecting wire 523 in a straight state.
  • a distance sensor is provided in the retractor 524 to detect the length value of the connecting wire 523 of the retractor 524, and the retractor 524 is connected to the controller 6.
  • the wire retractor 524 starts to work, and the floating block 51 drives the connecting wire 523 to move downward through the pulley 525 to the liquid level position, and stops the downward movement.
  • the distance sensor in the retractor 524 detects the length value of the connecting wire 523 of the retractor 524, and then combines the distance between the lid 2 and the inner pot body 3 to calculate the current liquid level.
  • a corresponding locking component or a driving component such as a motor may be provided in the wire retractor 524, so that when the lid 2 is opened Or before, the connecting wire 523 is retracted into the wire retractor 524.
  • the smart rice cooker further includes a temperature sensor 7, which is disposed at the bottom of the heating cavity 4 and contacts the inner pot body 3 to detect the inner pot The temperature in the body 3; the temperature sensor 7 is connected to the controller 6 to change the heating mode of the heating chamber 4 when the temperature in the inner pot body 3 reaches a preset value.
  • the temperature sensor 7 can detect the temperature in the inner pot body 3 in real time.
  • the temperature sensor 7 can be a temperature sensor made of a thermocouple, a thermistor, a ferrite and other temperature-sensitive soft magnetic materials.
  • the heating method can be adjusted in real time according to the temperature in the inner pot body 3, such as changing the heating power and location, changing the heating frequency, etc., to increase the taste of the rice.
  • the heating temperature of the inner pot body 3 For example, when it is detected that the temperature in the inner pot body 3 exceeds 100 ° C, the heating is automatically stopped or the heating power is reduced to avoid overheating to cause the paste pot.
  • the smart rice cooker further includes a wireless communication module 8 connected to the controller 6 so that the controller 6 establishes a wireless connection with the smart terminal 9.
  • the connection between the smart terminal 9 and the smart rice cooker can be achieved through the wireless communication module 8, so as to control the working process of the smart rice cooker through the smart terminal 9, wherein the smart terminal 9 can be a mobile phone , Tablet and other terminal devices.
  • the smart rice cooker provided by the present application detects the weight of the ingredients in the inner pot body 3 through the weighing sensor 12, and detects the food contained in the inner pot body 3 through the water level detection device 5
  • the volume of food ingredients, and the controller 6 calculates the amount of water and the amount of rice in the inner pot body 3.
  • the time required for cooking the ingredients in the inner pot body 4 is determined according to the calculated water amount and rice amount, thereby controlling the heating chamber 4 to heat according to the determined time.
  • the intelligent rice cooker provided by the present application can determine the heating time according to the amount of ingredients in the inner pot body 3, which can save energy to the greatest extent, and can accurately calculate the cooking time and the maturity time of the rice, which is convenient for realizing the appointment function.

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  • Food Science & Technology (AREA)
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Abstract

一种水位控制智能电饭锅，包括锅身（1）、锅盖（2）、内锅体（3）、加热腔（4）、水位检测装置（5）以及控制器（6）。在实际应用中，通过称重传感器（12）检测内锅体（3）中的食材重量，以及通过水位检测装置（5）检测内锅体（3）中盛装食材的体积，并由控制器（6）计算出内锅体（3）中的水量和米量。再根据计算的水量和米量确定煮熟内锅体（3）中食材所需要的时间，从而控制加热腔（4）按所确定的时间进行加热。该智能电饭锅，可以根据内锅体（3）中的食材量确定加热时间，可最大程度的节约能源，并且能够准确地计算煮饭时长，以及米饭的成熟时间，便于实现预约功能。

Description

一种水位控制智能电饭锅
本申请要求在2018年10月18日提交中国专利局、申请号为201811217222.3、发明名称为“一种水位控制智能电饭锅”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
本申请涉及智能家居技术领域，尤其涉及一种水位控制智能电饭锅。
背景技术
电饭锅能够在加入米和水后，自动结束煮饭过程，其实现方式包括两种，一种是感温开关，另一种是定时器。其中，感温开关是利用铁氧体等感温软磁材料制成，如果电饭锅内的温度超过100℃(一般为103℃)，感温软磁材料失去磁性，感温开关自动断开，停止加热。可见，感温开关何时自动断开取决于锅内加入的米和水的量，如果锅内加入的米和水的量较大，电饭锅的煮饭时间将延长。并且，现有的电饭锅并不能判断需要多久才能结束煮饭过程，即无法判断所煮的米饭何时煮熟。因此，利用感温开关的电饭锅一般不具备预约功能。
为了实现预约功能，现有的电饭锅通过定时器确定米饭的煮熟时间。即在实际应用中，不同类型的米饭设置不同的煮饭时间，例如普通柴火饭的时间为60min，快煮饭的时间为40min等。使用者选择了米饭类型后，电饭锅开始加热，在到达预设的时间后，停止加热，结束煮饭过程，因此米饭的煮熟时间就可以确定，方便实现预约功能。
但通过定时器确定米饭的煮熟时间的过程中，每种米饭类型的煮饭时间固定，当使用者每次添加的米和水量不同时，电饭锅依然消耗相同的煮饭时间。例如，使用者加入的米量是200g时，电饭锅的煮饭时间是60min，使用者加入的米量是500g时，电饭锅的煮饭时间也是60min。这使得加入米量少时，煮饭时间过长，相反加入米量大时，煮饭时间又过短。并且，为了避免米饭夹生，电饭锅的煮饭时间要设置的尽量的长，一般大于最大米量的煮饭时间，因此，采用定时器的电饭锅不仅浪费能源，而且影响米饭的口感。
发明内容
本申请提供了一种水位控制智能电饭锅，以解决传统电饭锅无法精确确定煮饭时间，以及浪费能源的问题。
本申请一种水位控制智能电饭锅，包括锅身、锅盖以及内锅体，所述锅身包括U形加热腔，所述内锅体可拆卸地设置在加热腔内，所述锅盖铰接在所述锅身的一侧，盖覆所述锅身的顶部；其中，所述锅身顶部设有承载所述内锅体的阶梯部，所述阶梯部上设有称重传感器，以检测所述内锅体及内锅体中食材的重量；
所述锅盖的底面上设有水位检测装置，所述水位检测装置包括漂浮块以及连接所述漂浮块的距离检测机构；所述漂浮块的材料密度小于水的密度，以漂浮在所述内锅体中盛装的水面上，检测所述内锅体中的食材体积；
所述智能电饭锅还包括控制器，所述控制器分别连接所述称重传感器、距离检测机构以及所述加热腔；所述控制器通过接收所述称重传感器和所述距离检测机构的检测数据，计算所述内锅体中的米量和水量，以及根据所计算的米量和水量，控制所述加热腔的运行时间。
在实际应用中，通过称重传感器检测内锅体中的食材重量，以及通过水位检测装置检测内锅体中盛装食材的体积，并由控制器计算出内锅体中的水量和米量。再根据计算的水量和米量确定煮熟内锅体中食材所需要的时间，从而控制加热腔按所确定的时间进行加热。本申请提供的智能电饭锅，可以根据内锅体中的食材量确定加热时间，可最大程度的节约能源，并且能够准确地计算煮饭时长，以及米饭的成熟时间，便于实现预约功能。
附图说明
为了更清楚地说明本申请的技术方案，下面将对实施例中所需要使用的附图作简单地介绍，显而易见地，对于本领域普通技术人员而言，在不付出创造性劳动性的前提下，还可以根据这些附图获得其他的附图。
图1为本申请一种水位控制智能电饭锅的结构示意图；
图2为本申请所述智能电饭锅的剖面图；
图3为本申请所述智能电饭锅锅盖开启状态的结构示意图；
图4为本申请所述智能电饭锅一种示例的剖面图；
图5为本申请所述智能电饭锅与智能终端的连接示意图。
具体实施方式
本申请提供的技术方案中，为了便于描述，除另有说明外，所述食材均是指制作米饭所用到的水和米。本申请以米和水组成食材为例阐述相关方案，实际应用中，根据不同类型的米以及饮食习惯，所述食材还可以包括其他类型的食用材料。
参见图1，为本申请一种水位控制智能电饭锅的结构示意图。参见图2，为本申请智能电饭锅的剖面图。由图1和图2可知，本申请提供的水位控制智能电饭锅，包括锅身1、锅盖2以及内锅体3。其中，锅身1可以为耐热非金属材料(如塑料)制成的壳体结构，其内部具有容纳加热部件和其他电子元件的腔体。锅身1包括U形加热腔4，所述加热腔4可以是锅身1上可以设置U形凹槽，加热腔4的加热部件可以是电热加热的方式，也可以是涡流磁场感应的方式。当采用电阻丝加热时，加热腔4可以是导热性较好的金属材料制成，电阻丝可以设置在加热腔4的底部，以节省锅身1的内部空间；也可以设置在加热腔4的底部和侧部，以获得更高效率的加热效果。
内锅体3可拆卸地设置在加热腔4内，内锅体3可以从加热腔4中取出，为了便于拿取，内锅体3可以是由金属材料制成的盆状结构，包括用于盛装食材的腔体以及设置在腔体顶部边缘位置上的锅沿。为了获得更好的加热效果，内锅体3与加热腔4的形状相适应，即尽量减小内锅体3与加热腔4之间的缝隙。锅盖2铰接在锅身1的一侧，盖覆锅身1的顶部，锅盖2用于提供密封效果，通过覆盖锅身1的顶部，减少内锅体3内的水分蒸发，维持内锅体3内的温度，以煮熟米饭。
显然，锅盖2用于提供密封效果，可以是铰接在锅身1的顶部，也可以是与锅身1进行分离的独立盖体。但由于本申请在后续煮饭过程中需要通过锅盖2上设置的传感器检测参数，因此，本申请提供的方案中优选锅盖2铰接在锅身1上的形式。在实际应用中，使用者先将水和米加入到内锅体3中，再将内锅体3放置在加热腔4内，最后将锅盖2盖覆在锅身的顶部。
需要说明的是，为了完成米饭的煮制过程，所述智能电饭锅还需要进行人为操作控制，即所述智能电饭锅还包括操控面板，操控面板可以设置在锅盖2的顶面上，也可以设置锅身1上。操控面板可用于选择工作模式，如煮饭、煮粥等，也可以用于设置预约时间，因此操控面板上可以集成多个不同功能的按键，以供使用者进行模式选 择。
本申请提供的技术方案中，锅身1顶部设有承载内锅体3的阶梯部11，阶梯部11上设有称重传感器12，以检测内锅体3及内锅体3中食材的重量。所述阶梯部11用于承载内锅体3，可以是环形阶梯结构，设置在加热腔4开口部分。阶梯部11包括环形侧面和底面，其中阶梯部11的底面接触内锅体3，侧面用于限制内锅体3的位置。称重传感器12设置在阶梯部11的底面，称重传感器12可以是压敏电阻也可以是应变片制成的传感器芯片。显然，由于内锅体3在加热过程中的温度较高，称重传感器12应具有一定的耐高温性能，即在100℃的条件下不会造成损坏。
进一步地，加热腔4的加热方式为磁场感应涡流加热，如图2所示，加热腔4的底部设置有环形的电磁涡流线圈，从而产生高频可变磁场，使金属质地的内锅体3发热，加热内锅体3内的食材。内锅体3的锅沿设置在阶梯部11上，以使内锅体3与加热腔4之间存在间隙。内锅体3的锅沿底部接触称重传感器12放置在阶梯部11的底面上，从而通过环形的阶梯部11支撑内锅体3，承载内锅体3的全部重量，以及，使称重传感器12检测内锅体3的重量。本实施例中，阶梯部11支撑起内锅体3的锅沿部分，可以使内锅体3的重力全部施加在称重传感器12上，即使内锅体3与加热腔4之间存在间隙，使称重传感器12检测的重量不受加热腔4的影响，获得更加精确的检测数值。
锅盖2的底面上设有水位检测装置5，水位检测装置5能够根据内锅体3内的液面位置，输出相应的信号，以便确定内锅体3内的食材量。水位检测装置5包括漂浮块51以及连接漂浮块51的距离检测机构52。其中，漂浮块51的材料密度小于水的密度，以漂浮在内锅体3中盛装的水面上，检测内锅体3中的食材体积。显然，漂浮块51也可以是空心结构，以便漂浮在水面上。距离检测机构52可确定漂浮块51的高度(或漂浮块51与锅盖2底面之间的距离)，从而确定当前的液面高度。
本申请提供的技术方案中，由于在实际煮饭过程中，需要加入足够多的水以煮熟米饭，在装有米的内锅体3中加入水后，米由于密度大于水，会沉在水底，即水会没过米。而在内锅体3中，不同高度所对应的容积是可以预先测量和标定的，因此，通过检测内锅体3中的水位高度，即可确定当前内锅体3中所加入的米与水的总体积。再结合称重传感器12检测的重量值，去除内锅体3的重量后，即可确定当前内锅体3中所盛装食材的总质量。
显然，由于内锅体3中的食材一般为米和水的混合物，单通过食材的总质量还不 能确定其中包含的米和水的质量，但纯水的密度和纯米的平均密度是已知的。因此，在本申请提供的技术方案中，还可以通过将当前体积下的纯水的质量与检测到的食材总质量进行对比，通过确定出当前内锅体3中所包含的米的质量和水的质量。从而根据米量和水量确定出煮熟这些食材所使用的时间。
为了实现上述计算过程，本申请中，所述智能电饭锅还包括控制器6，所述控制器6可以是能够满足上述计算要求的数据处理芯片，如单片机、PLC等。控制器6分别连接称重传感器12、距离检测机构52以及加热腔4。控制器6通过接收称重传感器12和距离检测机构52的检测数据，计算内锅体3中的米量和水量，以及根据所计算的米量和水量，控制加热腔4的运行时间。
本申请提供的技术方案中，控制器6在确定当前食材量的运行时间后，可以结合使用者在操控面板上设定的模式，动态生成一个控制策略，并将控制策略发送至加热腔4的驱动电路中。所述控制策略中可以包括总加热时长，加热开始时间，加热的结束时间，加热的功率以及功率变化等信息。为了获得更好的煮制效果，还可以包括加热方式(如加热部位)，加热频率等。
在本申请的一个示意的实施例中，如图2、图3所示，所述距离检测机构52包括铰接在锅盖2上的连杆521，以及设置在连杆521铰接位置上的角度传感器522，其中，角度传感器522连接控制器6，以使控制器6通过检测连杆521的下落角度，确定漂浮块51的高度。本实施例中，由于连杆521在锅盖2底面上的铰接位置是固定的，而漂浮块51始终漂浮在水面位置。因此，当漂浮块51的高度不同时，连杆521与锅盖2底面之间的夹角也不同，即通过角度传感器522即可检测出液面高度。
本实施例中，通过角度传感器522间接检测内锅体3的液面高度，可以避免使用其他类型的距离传感器时，占用内锅体3的内部空间。并且，通过连杆521铰接在锅盖2的底面，可以在开启锅盖2时，即锅盖2竖直放置时，自动折叠贴合在锅盖2的底面上，如图3所示；而在锅盖2覆盖在锅身1上时，通过自身的重力自动下落到水面位置，如图2所示。可见，在整个过程中水位检测装置都不会影响使用者的操作。
进一步地，所述漂浮块51为固定在连杆521端部上的球形结构。球形结构的漂浮块51可以在连杆521处于任何角度时，漂浮块51浸入水里的体积保持一致，即在受到的浮力大小相同时，所处的高度也相同，从而减轻漂浮块51的形状对水面高度产生影响。需要说明的是，本实施例中，连杆521的重量也会间接影响到漂浮块51的位置，因此，实际应用中，连杆521的重量应尽量轻，例如可使用轻质材料，如塑 料，并且可以将连杆521设置为空心结构，以减少漂浮块51承受连杆521的重量。
为了使连杆521能够自由偏转，本实施例中连杆521的长度小于或等于内锅体3的深度。同时，为了能够检测出更多情况下的水面高度。连杆521的长度大于或等于内锅体3的深度的1/2。具体的连杆521的长度可以根据内锅体3的设计规格进行调整，本申请不再赘述。
在本申请的另一个示意的实施例中，如图4所示，距离检测机构52包括连接线523、收线器524以及滑轮525。其中，连接线523的一端连接漂浮块51，另一端经过滑轮525连接收线器524，收线器524内部可以设置连接线523的绕线轮，以及维持连接线保持直的状态的弹力机构，如弹片等，弹力机构设置在绕线轮上，所提供的弹力小于漂浮块51的重力，以便使连接线523维持在直的状态。并且收线器524中设有距离传感器，以检测放出收线器524的连接线523的长度值，收线器524连接控制器6。
实际应用中，锅盖2覆盖在锅身1的顶部上以后，收线器524启动工作，漂浮块51带动连接线523经过滑轮525向下方运动至液面位置，停止向下运动，此时通过收线器524中的距离传感器，检测放出收线器524的连接线523的长度值，再结合锅盖2与内锅体3之间的距离，就可以计算出当前的液面高度。另外，为了使距离检测机构52不影响到锅盖2的开启和关闭，本实施例中还可以在收线器524中设置相应的锁定部件，或电机等驱动部件，以便在开启锅盖2时或之前，将连接线523收回至收线器524中。
在本申请的部分实施例中，如图2所示，所述智能电饭锅还包括感温传感器7，感温传感器7设置在加热腔4的底部，接触内锅体3，以检测内锅体3中的温度；感温传感器7连接控制器6，以在内锅体3中的温度到达预设值时，改变加热腔4的加热方式。本实施例中，感温传感器7可以实时检测内锅体3内的温度，感温传感器7可以是热电偶、热敏电阻以及铁氧体等感温软磁材料制成的温度传感器。
本实施例通过设置感温传感器7一方面，可以根据内锅体3中的温度实时调整加热方式，如改变加热功率、部位，改变加热频率等，以增加米饭的口感。另一方面，还可以在通过检测内锅体3的加热温度，确定是否出现米饭提前成熟的情况。例如，当检测到内锅体3内的温度超过100℃，则自动停止加热或者减小加热功率，以避免过度加热造成糊锅。
在本申请的部分实施例中，如图5所示。所述智能电饭锅还包括无线通信模块8， 无线通信模块8连接控制器6，以使控制器6与智能终端9建立无线连接。本实施例中，可以通过无线通信模块8实现智能终端9与所述智能电饭锅之间连接，从而通过智能终端9控制所述智能电饭锅的工作过程，其中，智能终端9可以是手机、平板电脑等终端设备。
由以上技术方案可知，本申请提供的所述智能电饭锅在实际应用中，通过称重传感器12检测内锅体3中的食材重量，以及通过水位检测装置5检测内锅体3中盛装的食材体积，并由控制器6计算出内锅体3中的水量和米量。再根据计算的水量和米量确定煮熟内锅体4中的食材所需要的时间，从而控制加热腔4按所确定的时间进行加热。本申请提供的智能电饭锅，可以根据内锅体3中的食材量确定加热时间，可最大程度的节约能源，并且能够准确地计算煮饭时长，以及米饭的成熟时间，便于实现预约功能。

Claims (7)

  1. 一种水位控制智能电饭锅，包括锅身、锅盖以及内锅体，所述锅身包括U形加热腔，所述内锅体可拆卸地设置在加热腔内，所述锅盖铰接在所述锅身的一侧，盖覆所述锅身的顶部；其特征在于，所述锅身顶部设有承载所述内锅体的阶梯部，所述阶梯部上设有称重传感器，以检测所述内锅体及内锅体中食材的重量；
    所述锅盖的底面上设有水位检测装置，所述水位检测装置包括漂浮块以及连接所述漂浮块的距离检测机构；所述漂浮块的材料密度小于水的密度，以漂浮在所述内锅体中盛装的水面上，检测所述内锅体中的食材体积；
    所述智能电饭锅还包括控制器，所述控制器分别连接所述称重传感器、距离检测机构以及所述加热腔；所述控制器通过接收所述称重传感器和所述距离检测机构的检测数据，计算所述内锅体中的米量和水量，以及根据所计算的米量和水量，控制所述加热腔的运行时间。
  2. 根据权利要求1所述的智能电饭锅，其特征在于，所述距离检测机构包括铰接在所述锅盖上的连杆，以及设置在所述连杆铰接位置上的角度传感器，所述角度传感器连接所述控制器，以使所述控制器通过检测所述连杆的下落角度，确定所述漂浮块的高度。
  3. 根据权利要求2所述的智能电饭锅，其特征在于，所述漂浮块为固定在所述连杆端部上的球形结构；所述连杆的长度小于或等于所述内锅体的深度；所述连杆的长度大于或等于所述内锅体的深度的1/2。
  4. 根据权利要求1所述的智能电饭锅，其特征在于，所述距离检测机构包括连接线、收线器以及滑轮，所述连接线的一端连接所述漂浮块，另一端经过所述滑轮连接所述收线器，所述收线器中设有距离传感器，以检测放出所述收线器的所述连接线的长度值；所述收线器连接所述控制器。
  5. 根据权利要求1所述的智能电饭锅，其特征在于，所述智能电饭锅还包括感温传感器，所述感温传感器设置在所述加热腔的底部，接触所述内锅体，以检测所述内锅体中的温度；所述感温传感器连接所述控制器，以在所述内锅体中 的温度到达预设值时，改变所述加热腔的加热方式。
  6. 根据权利要求1所述的智能电饭锅，其特征在于，所述加热腔的加热方式为磁场感应涡流加热，所述内锅体的锅沿设置在所述阶梯部上，使所述内锅体与所述加热腔之间存在间隙。
  7. 根据权利要求1所述的智能电饭锅，其特征在于，所述智能电饭锅还包括无线通信模块，所述无线通信模块连接所述控制器，以使所述控制器与智能终端建立无线连接。
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