WO2016077962A1 - 电磁式用电器及电磁加热控制电路 - Google Patents

电磁式用电器及电磁加热控制电路 Download PDF

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Publication number
WO2016077962A1
WO2016077962A1 PCT/CN2014/091281 CN2014091281W WO2016077962A1 WO 2016077962 A1 WO2016077962 A1 WO 2016077962A1 CN 2014091281 W CN2014091281 W CN 2014091281W WO 2016077962 A1 WO2016077962 A1 WO 2016077962A1
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Prior art keywords
resistor
electromagnetic heating
electromagnetic
comparator
circuit
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PCT/CN2014/091281
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English (en)
French (fr)
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魏晓敏
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魏晓敏
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Priority to PCT/CN2014/091281 priority Critical patent/WO2016077962A1/zh
Priority to CN201490000356.9U priority patent/CN204717778U/zh
Publication of WO2016077962A1 publication Critical patent/WO2016077962A1/zh

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    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/06—Control, e.g. of temperature, of power
    • H—ELECTRICITY
    • H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
    • H05B—ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL
    • H05B6/00—Heating by electric, magnetic or electromagnetic fields
    • H05B6/02—Induction heating
    • H05B6/10—Induction heating apparatus, other than furnaces, for specific applications
    • H05B6/12—Cooking devices

Definitions

  • the present application relates to the field of home appliances, and in particular to an electromagnetic appliance and an electromagnetic heating control circuit.
  • the electromagnetic heating product is provided with an electromagnetic heating module and a control chip for controlling the operation of the electromagnetic heating module.
  • the power supply of the electromagnetic heating product is usually from the utility power grid, but due to the fluctuation of the utility power grid, the city When the voltage of the electric grid is higher or lower, the components in the electromagnetic heating module are greatly damaged, and even the service life of the electromagnetic heating product is affected.
  • the present application aims to solve at least one of the above technical problems to some extent.
  • the present application provides an electromagnetic heating control circuit for controlling operation of an electromagnetic heating module, the electromagnetic heating control circuit comprising: a rectifying circuit connected to a mains power supply, and connected to the rectifying circuit a reference voltage supply circuit, a first resistor, a second resistor, and a comparator; the first resistor is coupled to the second resistor, the other end of the second resistor is grounded, and the comparator negative input is coupled to the reference
  • the output of the voltage supply circuit is connected, the positive input is connected to a connection point between the first resistor and the second resistor, and the output of the comparator is connected to the control end of the electromagnetic heating module.
  • the rectifier circuit is a rectifier bridge composed of a plurality of diodes.
  • a capacitor is further connected in parallel to the first resistor.
  • the present application provides an electromagnetic appliance, comprising: an electromagnetic heating module, the electromagnetic appliance further comprising: an electromagnetic heating control circuit for controlling the operation of the electromagnetic heating module, the electromagnetic
  • the heating control circuit includes: a rectifier circuit connected to the mains power supply, a reference voltage supply circuit connected to the rectifier circuit, a first resistor, a second resistor, and a comparator; the first resistor is connected to the second resistor, The other end of the second resistor is grounded, the comparator negative input terminal is connected to the output end of the reference voltage supply circuit, and the positive input terminal is connected to the connection point between the first resistor and the second resistor.
  • the comparator output is coupled to the control terminal of the electromagnetic heating module.
  • the rectifier circuit is a rectifier bridge composed of a plurality of diodes.
  • a capacitor is further connected in parallel to the first resistor.
  • the electromagnetic appliance is an electric pressure cooker or an induction cooker.
  • the electromagnetic heating control circuit comprises: connected to a mains power supply a rectifier circuit, a reference voltage supply circuit connected to the rectifier circuit, a first resistor, a second resistor, and a comparator; the first resistor is connected to the second resistor, and the other end of the second resistor is grounded a comparator negative input terminal connected to the output terminal of the reference voltage supply circuit, a positive input terminal connected to a connection point between the first resistor and the second resistor, the comparator output terminal and the electromagnetic The control terminals of the heating module are connected.
  • the comparator obtains the real-time voltage characterization value of the mains power supply, which is higher than the reference voltage provided by the reference voltage supply circuit, and indicates that the higher the mains voltage at this time will generate the electromagnetic heating module.
  • the comparator outputs a control signal to the electromagnetic heating module to disable it, thereby protecting the electromagnetic heating module and the electromagnetic appliance.
  • FIG. 1 is a schematic structural view of an electromagnetic heating control circuit of a first embodiment of the present application.
  • FIG. 2 is a schematic structural view of an electromagnetic heating control circuit according to a second embodiment of the present application.
  • first and second are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” and “second” may include one or more of the features either explicitly or implicitly.
  • the meaning of "a plurality” is two or more unless specifically and specifically defined otherwise.
  • the terms “installation”, “connected”, “connected”, “fixed” and the like shall be understood broadly, and may be either a fixed connection or a detachable connection, unless otherwise explicitly stated and defined. , or connected integrally; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • installation shall be understood broadly, and may be either a fixed connection or a detachable connection, unless otherwise explicitly stated and defined. , or connected integrally; may be mechanical connection or electrical connection; may be directly connected, or may be indirectly connected through an intermediate medium, and may be internal communication between the two elements.
  • the specific meanings of the above terms in the present application can be understood on a case-by-case basis.
  • the first feature "on” or “under” the second feature may include direct contact of the first and second features, and may also include first and second features, unless otherwise specifically defined and defined. Not directly contact but through Additional feature contact between them.
  • the first feature “above”, “above” and “above” the second feature includes the first feature directly above and above the second feature, or merely indicating that the first feature level is higher than the second feature.
  • the first feature “below”, “below” and “below” the second feature includes the first feature directly above and above the second feature, or merely the first feature level being less than the second feature.
  • Embodiment 1 is a diagrammatic representation of Embodiment 1:
  • the application provides an electromagnetic appliance, comprising: an electromagnetic heating module 1 , the electromagnetic appliance further comprises: an electromagnetic heating control circuit for controlling the operation of the electromagnetic heating module 1 , the electromagnetic heating control circuit comprises: A rectifier circuit 2 connected to the commercial power source, a reference voltage supply circuit 3 connected to the rectifier circuit 2, a first resistor R1, a second resistor R2, and a comparator Q.
  • connection relationship of the above device is as follows: the first resistor R1 is connected to the second resistor R2, the other end of the second resistor R2 is grounded, and the negative input terminal (-) of the comparator Q is connected to the output terminal of the reference voltage supply circuit 3, and the positive input terminal ( +) is connected to the connection point between the first resistor R1 and the second resistor R2, and the output of the comparator Q is connected to the control terminal of the electromagnetic heating module 1.
  • the rectifier circuit 2 can be a rectifier bridge composed of several diodes.
  • the above-mentioned electromagnetic type electric appliance is an electric pressure cooker or an induction cooker.
  • the rectifying circuit 2 rectifies the current outputted by the mains power supply, and outputs the voltage dividing circuit formed by the first resistor and the second resistor.
  • the connection point between the first resistor and the second resistor indicates the real-time voltage of the mains power source.
  • the reference voltage supply circuit can be a circuit or a chip that provides a preset reference voltage, and the comparator can output a control signal by comparing the reference voltage with the real-time voltage, when the real-time voltage is higher than the reference voltage, indicating At this time, the high voltage of the mains will adversely affect the electromagnetic heating module, and the comparator outputs a control signal to the electromagnetic heating module to disable it, thereby protecting the electromagnetic heating module and the electromagnetic appliance.
  • the real-time voltage is lower than the reference The voltage indicates that the mains voltage is normal at this time and will not adversely affect the electromagnetic heating module.
  • the comparator outputs a control signal to the electromagnetic heating module to operate.
  • Embodiment 2 is a diagrammatic representation of Embodiment 1:
  • the difference from the above embodiment is mainly that a capacitor C is further connected in parallel to the first resistor R1. This is because the sudden change of the mains power supply will generate interference pulses. Capacitor C can provide a coupling channel to the interference pulse, improve the speed at which the comparator responds to the interference pulse, further shorten the time for the electromagnetic heating module to work under high pressure, and reduce the electromagnetic heating. Damage to each component of the module.

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  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Electric Stoves And Ranges (AREA)
  • Induction Heating Cooking Devices (AREA)

Abstract

一种电磁加热控制电路，包括：与市电电源相连的整流电路（2）、与该整流电路（2）相连的基准电压提供电路（3）、第一电阻（R1）、第二电阻（R2），以及比较器（Q）；所述第一电阻（R1）与所述第二电阻（R2）相连，所述第二电阻（R2）另一端接地，所述比较器（Q）负输入端与所述基准电压提供电路（3）的输出端相连，正输入端连接至所述第一电阻（R1）与所述第二电阻（R2之间的连接点，所述比较器（Q）输出端与所述电磁加热模块（1）的控制端相连。这样，在市电电压较高会对电磁加热模块产生不利影响时，比较器输出控制信号至电磁加热模块使其不工作，从而保护电磁加热模块及电磁式用电器。

Description

电磁式用电器及电磁加热控制电路 技术领域
本申请涉及家电领域，尤其涉及一种电磁式用电器及电磁加热控制电路。
背景技术
众所周知，随着电磁加热技术的发展，电磁加热产品已经得到了广泛的应用。现有技术中，电磁加热产品内设有电磁加热模块和用于控制电磁加热模块工作的控制芯片，该电磁加热产品的电源通常来自于市电电网，但是由于市电电网波动较大，当市电电网的电压较高或较低时，对电磁加热模块内的元器件损害较大，甚至影电磁加热产品的使用寿命。
发明内容
本申请旨在至少在一定程度上解决上述技术问题之一。
根据本申请的第一方面，本申请提供一种电磁加热控制电路，其用于控制电磁加热模块工作，所述电磁加热控制电路包括：与市电电源相连的整流电路、与该整流电路相连的基准电压提供电路、第一电阻、第二电阻，以及比较器；所述第一电阻与所述第二电阻相连，所述第二电阻另一端接地，所述比较器负输入端与所述基准电压提供电路的输出端相连，正输入端连接至所述第一电阻与所述第二电阻之间的连接点，所述比较器输出端与所述电磁加热模块的控制端相连。
进一步地，所述整流电路为由若干二极管组成的整流桥。
进一步地，所述第一电阻上还并联有一电容。
根据本申请的第二方面，本申请提供一种电磁式用电器，包括：电磁加热模块，所述电磁式用电器还包括：用于控制所述电磁加热模块工作的电磁加热控制电路，该电磁加热控制电路包括：与市电电源相连的整流电路、与该整流电路相连的基准电压提供电路、第一电阻、第二电阻，以及比较器；所述第一电阻与所述第二电阻相连，所述第二电阻另一端接地，所述比较器负输入端与所述基准电压提供电路的输出端相连，正输入端连接至所述第一电阻与所述第二电阻之间的连接点，所述比较器输出端与所述电磁加热模块的控制端相连。
进一步地，所述整流电路为由若干二极管组成的整流桥。
进一步地，所述第一电阻上还并联有一电容。
进一步地，所述电磁式用电器为电压力锅或电磁炉。
本申请的有益效果是：
通过提供一种电磁式用电器及电磁加热控制电路，电磁加热控制电路包括：与市电电源相连 的整流电路、与该整流电路相连的基准电压提供电路、第一电阻、第二电阻，以及比较器；所述第一电阻与所述第二电阻相连，所述第二电阻另一端接地，所述比较器负输入端与所述基准电压提供电路的输出端相连，正输入端连接至所述第一电阻与所述第二电阻之间的连接点，所述比较器输出端与所述电磁加热模块的控制端相连。这样，比较器获取的为市电电源的实时电压表征值，其与基准电压提供电路提供的基准电压相比，若高于基准电压，则表明此时市电电压较高会对电磁加热模块产生不利影响，比较器输出控制信号至电磁加热模块使其不工作，从而保护了电磁加热模块及电磁式用电器。
附图说明
图1为本申请第一实施例的电磁加热控制电路的结构示意图。
图2为本申请第二实施例的电磁加热控制电路的结构示意图。
具体实施方式
下面详细描述本申请的实施例，所述实施例的示例在附图中示出，其中自始至终相同或类似的标号表示相同或类似的元件或具有相同或类似功能的元件。下面通过参考附图描述的实施例是示例性的，旨在用于解释本申请，而不能理解为对本申请的限制。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“长度”、“宽度”、“厚度”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“顶”、“底”“内”、“外”、“顺时针”、“逆时针”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请的限制。
此外，术语“第一”、“第二”仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”的特征可以明示或者隐含地包括一个或者更多个该特征。在本申请的描述中，“多个”的含义是两个或两个以上，除非另有明确具体的限定。
在本申请中，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”、“固定”等术语应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以根据具体情况理解上述术语在本申请中的具体含义。
在本申请中，除非另有明确的规定和限定，第一特征在第二特征之“上”或之“下”可以包括第一和第二特征直接接触，也可以包括第一和第二特征不是直接接触而是通 过它们之间的另外的特征接触。而且，第一特征在第二特征“之上”、“上方”和“上面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度高于第二特征。第一特征在第二特征“之下”、“下方”和“下面”包括第一特征在第二特征正上方和斜上方，或仅仅表示第一特征水平高度小于第二特征。
下面通过具体实施方式结合附图对本申请作进一步详细说明。
实施例一：
请参考图1，申请提供一种电磁式用电器，包括：电磁加热模块1，电磁式用电器还包括：用于控制电磁加热模块1工作的电磁加热控制电路，该电磁加热控制电路包括：与市电电源相连的整流电路2、与该整流电路2相连的基准电压提供电路3、第一电阻R1、第二电阻R2，以及比较器Q。
上述器件的连接关系如下：第一电阻R1与第二电阻R2相连，第二电阻R2另一端接地，比较器Q负输入端(-)与基准电压提供电路3的输出端相连，正输入端(+)连接至第一电阻R1与第二电阻R2之间的连接点，比较器Q输出端与电磁加热模块1的控制端相连。
而整流电路2可以为由若干二极管组成的整流桥。
上述电磁式用电器为电压力锅或电磁炉等。
上述电磁加热控制电路的工作原理大致如下：
整流电路2对市电电源输出的电流进行整流后，输出至第一电阻与第二电阻形成的分压电路，第一电阻与第二电阻之间的连接点指示了市电电源的实时电压，基准电压提供电路可以为一种电路或芯片，其提供了预先设定的基准电压，比较器通过将基准电压与实时电压相比，就能输出一控制信号，当实时电压高于基准电压，表明此时市电电压较高会对电磁加热模块产生不利影响，比较器输出控制信号至电磁加热模块使其不工作，从而保护了电磁加热模块及电磁式用电器，相反，若实时电压低于基准电压，表明此时市电电压正常，不会对电磁加热模块产生不利影响，比较器输出控制信号至电磁加热模块使其工作。
实施例二：
请参考图2，与上述实施例区别主要在于：第一电阻R1上还并联有一电容C。这是由于市电电源突变会产生干扰脉冲，电容C可对干扰脉冲提供一耦合通道，提高比较器对干扰脉冲作出响应的速度，进一步缩短电磁加热模块工作在高压下的时间，减少对电磁加热模块各器件的损坏。
在本说明书的描述中，参考术语“一个实施方式”、“一些实施方式”、“一个实施 例”、“一些实施例”、“示例”、“具体示例”、或“一些示例”等的描述意指结合该实施例或示例描述的具体特征、结构、材料或者特点包含于本申请的至少一个实施例或示例中。在本说明书中，对上述术语的示意性表述不一定指的是相同的实施例或示例。而且，描述的具体特征、结构、材料或者特点可以在任何的一个或多个实施例或示例中以合适的方式结合。
以上内容是结合具体的实施方式对本申请所作的进一步详细说明，不能认定本申请的具体实施只局限于这些说明。对于本申请所属技术领域的普通技术人员来说，在不脱离本申请构思的前提下，还可以做出若干简单推演或替换。

Claims (7)

  1. 一种电磁加热控制电路，其用于控制电磁加热模块工作，其特征在于，所述电磁加热控制电路包括：与市电电源相连的整流电路、与该整流电路相连的基准电压提供电路、第一电阻、第二电阻，以及比较器；所述第一电阻与所述第二电阻相连，所述第二电阻另一端接地，所述比较器负输入端与所述基准电压提供电路的输出端相连，正输入端连接至所述第一电阻与所述第二电阻之间的连接点，所述比较器输出端与所述电磁加热模块的控制端相连。
  2. 如权利要求1所述的电磁加热控制电路，其特征在于，所述整流电路为由若干二极管组成的整流桥。
  3. 如权利要求1所述的电磁加热控制电路，其特征在于，所述第一电阻上还并联有一电容。
  4. 一种电磁式用电器，包括：电磁加热模块，其特征在于，所述电磁式用电器还包括：用于控制所述电磁加热模块工作的电磁加热控制电路，该电磁加热控制电路包括：与市电电源相连的整流电路、与该整流电路相连的基准电压提供电路、第一电阻、第二电阻，以及比较器；所述第一电阻与所述第二电阻相连，所述第二电阻另一端接地，所述比较器负输入端与所述基准电压提供电路的输出端相连，正输入端连接至所述第一电阻与所述第二电阻之间的连接点，所述比较器输出端与所述电磁加热模块的控制端相连。
  5. 如权利要求4所述的电磁式用电器，其特征在于，所述整流电路为由若干二极管组成的整流桥。
  6. 如权利要求4所述的电磁式用电器，其特征在于，所述第一电阻上还并联有一电容。
  7. 如权利要求4-6中任一项所述的电磁式用电器，其特征在于，所述电磁式用电器为电压力锅或电磁炉。
PCT/CN2014/091281 2014-11-17 2014-11-17 电磁式用电器及电磁加热控制电路 WO2016077962A1 (zh)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687896A (en) * 1985-03-28 1987-08-18 Gold Star Co., Ltd. 100 Volt/220 volt compatible electromagnetic induction heating cooker
KR20060116927A (ko) * 2005-05-12 2006-11-16 이영수 공진형 유도가열 조리기
CN203504786U (zh) * 2013-09-13 2014-03-26 美的集团股份有限公司 电磁加热控制电路及电压力锅
CN203504787U (zh) * 2013-09-13 2014-03-26 美的集团股份有限公司 电磁加热电路及电压力锅
CN203912238U (zh) * 2014-06-06 2014-10-29 佛山市顺德区美的电热电器制造有限公司 用于电磁炉的线圈盘组件及具有它的电磁炉

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4687896A (en) * 1985-03-28 1987-08-18 Gold Star Co., Ltd. 100 Volt/220 volt compatible electromagnetic induction heating cooker
KR20060116927A (ko) * 2005-05-12 2006-11-16 이영수 공진형 유도가열 조리기
CN203504786U (zh) * 2013-09-13 2014-03-26 美的集团股份有限公司 电磁加热控制电路及电压力锅
CN203504787U (zh) * 2013-09-13 2014-03-26 美的集团股份有限公司 电磁加热电路及电压力锅
CN203912238U (zh) * 2014-06-06 2014-10-29 佛山市顺德区美的电热电器制造有限公司 用于电磁炉的线圈盘组件及具有它的电磁炉

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