WO2017084436A1 - 电量检测电路及燃气灶 - Google Patents

电量检测电路及燃气灶 Download PDF

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Publication number
WO2017084436A1
WO2017084436A1 PCT/CN2016/100371 CN2016100371W WO2017084436A1 WO 2017084436 A1 WO2017084436 A1 WO 2017084436A1 CN 2016100371 W CN2016100371 W CN 2016100371W WO 2017084436 A1 WO2017084436 A1 WO 2017084436A1
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Prior art keywords
circuit
resistor
battery
comparator
voltage
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PCT/CN2016/100371
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English (en)
French (fr)
Inventor
曾宪光
张炳卫
赖育文
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广东美的厨房电器制造有限公司
美的集团股份有限公司
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Priority claimed from CN201510791332.0A external-priority patent/CN105277900A/zh
Priority claimed from CN201520921869.XU external-priority patent/CN205139336U/zh
Application filed by 广东美的厨房电器制造有限公司, 美的集团股份有限公司 filed Critical 广东美的厨房电器制造有限公司
Publication of WO2017084436A1 publication Critical patent/WO2017084436A1/zh

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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24C—DOMESTIC STOVES OR RANGES ; DETAILS OF DOMESTIC STOVES OR RANGES, OF GENERAL APPLICATION
    • F24C3/00—Stoves or ranges for gaseous fuels
    • F24C3/12—Arrangement or mounting of control or safety devices
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
    • G01R31/36—Arrangements for testing, measuring or monitoring the electrical condition of accumulators or electric batteries, e.g. capacity or state of charge [SoC]

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  • the invention relates to the technical field of gas stoves, in particular to a power detecting circuit and a gas stove.
  • the existing gas stove usually has a power detecting circuit to detect the battery power, and outputs a corresponding prompt message when the battery is low to remind the user to replace the battery to ensure the normal operation of the gas stove.
  • the electric quantity detecting circuit is in the detecting state in real time, so that the power consumption is large, which affects the service life of the battery.
  • the main object of the present invention is to provide a power detecting circuit and a gas stove, which aim to reduce the power consumption of the power detecting and extend the service life of the battery.
  • the present invention provides a power quantity detecting circuit including a voltage sampling circuit, a comparator, a current limiting resistor, a boosting circuit, and a delay circuit, wherein the voltage sampling circuit is used for a collecting station a voltage at an output end of the booster circuit; one of an inverting input terminal and a non-inverting input terminal of the comparator is connected to an output end of the voltage sampling circuit, and the other is connected to a positive electrode of the battery to be tested through a current limiting resistor, To detect whether the voltage of the battery to be tested is lower than a preset value, a power terminal of the comparator is connected to an output end of the booster circuit; an input end of the booster circuit and a positive electrode of the battery to be tested The delay circuit is connected to the preset button switch, and is configured to control the boosting circuit to generate an output voltage within a preset time period after the button is pressed.
  • the voltage sampling circuit includes a first resistor and a second resistor, one end of the first resistor is connected to an output end of the booster circuit, and the other end is connected to an inverting input end of the comparator; One end of the second resistor is connected to the inverting input of the comparator, and the other end is grounded.
  • the electric quantity detecting circuit further comprises a third resistor and a light emitting diode, wherein an anode of the light emitting diode is connected to an output end of the boosting circuit, and a cathode passes through the third resistor and an output end of the comparator connection.
  • the boosting circuit includes a boosting chip and a first inductor, and an input end of the boosting chip is connected to a positive electrode of the battery to be tested through the first inductor, and a power terminal and the battery to be tested Positive connection, enable end and said extension The circuit is connected and the output is the output of the booster circuit.
  • the boosting circuit further includes a first capacitor, one end of the first capacitor is connected to the output end of the boosting chip, and the other end is connected to the ground.
  • the boosting circuit further includes a second capacitor, one end of the second capacitor is connected to the power end of the boosting chip, and the other end is connected to the ground.
  • the delay circuit includes a fourth resistor, a fifth resistor and a third capacitor, the first end of the fourth resistor is connected to the enable end of the boosting chip, and the second end is grounded through the fifth resistor. Connecting; the third capacitor is connected in parallel to both ends of the fifth resistor.
  • the delay circuit further includes a first diode and a second diode
  • the preset button includes a first knob button and a second knob button
  • the anode and the cathode of the first diode The first knob is connected, the cathode is connected to the first end of the fourth resistor, and when the first knob button is pressed, the first diode is turned on; the second diode
  • the anode of the tube is connected to the second knob button, the cathode is connected to the first end of the fourth resistor, and when the second knob button is pressed, the second diode is turned on.
  • the present invention further provides a gas stove, the gas stove electric quantity detecting circuit, the electric quantity detecting circuit comprises a voltage sampling circuit, a comparator, a current limiting resistor, a boosting circuit and a delay circuit, wherein
  • the voltage sampling circuit is configured to collect a voltage at an output end of the boosting circuit; one of an inverting input end and a non-inverting input end of the comparator is connected to an output end of the voltage sampling circuit, and the other is limited
  • the current resistance is connected to the positive electrode of the battery to be tested to detect whether the voltage of the battery to be tested is lower than a preset value, and the power terminal of the comparator is connected to the output end of the booster circuit;
  • the input end is connected to the positive pole of the battery to be tested;
  • the delay circuit is connected to the preset button switch, and is configured to control the booster circuit to generate an output voltage within a preset time period after the button is pressed .
  • the power detecting circuit includes a voltage sampling circuit, a comparator, a current limiting resistor, a boosting circuit, and a delay circuit, wherein the voltage sampling circuit is configured to collect the output end of the boosting circuit.
  • the power terminal of the comparator is connected to the output end of the booster circuit; the input end of the booster circuit is connected to the positive pole of the battery to be tested;
  • the circuit is coupled to the preset button switch for controlling the boost circuit to generate an output voltage for a preset period of time after the button is pressed. Therefore, the power detection can be performed at the moment when the gas stove is ignited. When the power detection is not performed, the power consumption of the power detection circuit is zero. Therefore, the present invention reduces the power consumption of the power detection and prolongs the service life of the battery.
  • FIG. 1 is a circuit configuration diagram of a power detecting circuit according to an exemplary embodiment of the present invention.
  • Label name Label name 10 Voltage sampling circuit R5 Fifth resistor 20 Comparators 41 Boost chip 30 Current limiting resistor L First inductance 40 Boost circuit C1 First capacitor 50 Delay circuit C2 Second capacitor R1 First resistance C3 Third capacitor R2 Second resistance D1 First diode R3 Third resistance D2 Second diode R4 Fourth resistor
  • first, second, and the like in the present invention are used for the purpose of description only, and are not to be construed as indicating or implying their relative importance or implicitly indicating the number of technical features indicated.
  • features defining “first” or “second” may include at least one of the features, either explicitly or implicitly.
  • the technical solutions between the various embodiments may be combined with each other, but must be based on the realization of those skilled in the art, and when the combination of the technical solutions is contradictory or impossible to implement, it should be considered that the combination of the technical solutions does not exist. It is also within the scope of protection required by the present invention.
  • FIG. 1 is a schematic diagram of a circuit structure of a power detecting circuit according to an exemplary embodiment of the present invention.
  • the power detecting circuit includes a voltage sampling circuit 10 , a comparator 20 , a current limiting resistor 30 , and a boosting device .
  • the circuit 40 and the delay circuit 50 wherein the voltage sampling circuit 10 is configured to collect the voltage of the output terminal 40 o of the boosting circuit 40; one of the inverting input terminal and the non-inverting input terminal of the comparator 20
  • the output of the voltage sampling circuit 10 is connected, and the other is connected to the positive electrode of the battery to be tested through the current limiting resistor 30 to detect whether the voltage of the battery to be tested is lower than a preset value, and the power of the comparator 20
  • the terminal is connected to the output terminal 40 o of the boosting circuit 40; the input end of the boosting circuit 40 is connected to the positive terminal (VBAT) of the battery to be tested; and the delay circuit 50 is connected to the preset button switch. And for controlling the boosting circuit 40 to generate an output voltage within a preset time period when the button is pressed.
  • the circuit detection circuit provided in this embodiment is mainly used in a gas stove for detecting the battery power in the gas stove.
  • the above button may be a knob button for a gas stove for firing.
  • the output of the voltage sampling circuit 10 and the anode of the battery to be tested and the inverting input of the comparator 20 and the non-inverting input can be set according to actual needs.
  • the output of the voltage sampling circuit 10 It can be connected to the inverting input of the comparator 20, and the positive terminal of the battery to be tested is connected to the non-inverting input of the comparator 20; in another embodiment, the output of the voltage sampling circuit 10 can be connected to the non-inverting input of the comparator 20. Connected, the positive pole of the battery to be tested is connected to the inverting input of the comparator 20.
  • the preset value is a voltage comparison value sampled by the voltage sampling circuit 10, that is, the comparator 20 is configured to compare the magnitude relationship between the battery voltage to be tested and the voltage comparison value sampled by the voltage sampling circuit 10, and then from the comparator.
  • the output of 20 outputs corresponding level information, and the power information can be obtained according to the level information.
  • the delay circuit 50 is configured to receive a voltage signal transmitted by the button.
  • the boost circuit 40 starts to operate, and the voltage of the battery to be tested is boosted, and the voltage is boosted and output to the power supply of the comparator 20. End, to control the comparator 20 to start working.
  • the voltage information of the battery to be tested is determined by comparing the voltages of the non-inverting input terminal and the inverting input terminal of the comparator 20.
  • the button is released, the button stops inputting a high level voltage, and the delay circuit discharges.
  • the boost circuit 40 stops working. At this time, the boost circuit 40 has no output voltage, and the comparison is performed. The device 20 stops working, thereby stopping the power detection of the battery to be tested.
  • the power detecting circuit includes a voltage sampling circuit 10, a comparator 20, a current limiting resistor 30, a boosting circuit 40, and a delay circuit 50, wherein the voltage sampling circuit 10 is used for an acquisition center.
  • the voltage at the output of the booster circuit 40; one of the inverting input and the non-inverting input of the comparator 20 is connected to the output of the voltage sampling circuit 10, and the other through the current limiting resistor 30 and the battery to be tested
  • the positive pole is connected to detect whether the voltage of the battery to be tested is lower than a preset value, and the power terminal of the comparator 20 is connected to the output end of the booster circuit 40; the input end of the booster circuit 40 is The positive electrode (VBAT) of the battery to be tested is connected; the delay circuit 50 is connected to a preset button switch, and is configured to control the boosting circuit 40 to generate within a preset time period after the button is pressed.
  • the power detection can be performed at the moment when the gas stove is ignited.
  • the power consumption of the power detection circuit is zero. Therefore, the present invention reduces the power consumption of the power detection and prolongs the service life of the battery.
  • the structure of the voltage sampling circuit may be set according to actual needs.
  • the voltage sampling circuit includes a first resistor R1 and a second resistor R2, and one end of the first resistor R1 and the boosting circuit The output of 40 is connected, the other end is connected to the inverting input of the comparator 20; one end of the second resistor R2 is connected to the inverting input of the comparator 20, and the other end is grounded.
  • the resistance values of the first resistor R1 and the second resistor R2 may be set according to actual needs.
  • the voltage comparison value is a voltage value across the second resistor R2.
  • the comparator 20 When the comparator 20 is in an operating state, when the voltage value of the battery to be tested is lower than the voltage value across the second resistor R2, the output of the comparator 20 outputs a low level signal; when the battery to be tested When the voltage value is higher than the voltage value across the second resistor R2, the output of the comparator 20 will output a high level signal.
  • the structure of the reminder circuit after the power quantity detection can be set according to actual needs.
  • the power detecting circuit further includes a third resistor R3 and a light emitting diode LED, wherein an anode of the light emitting diode LED is connected to an output end of the boosting circuit 40, and a cathode passes through the third resistor R3 The output of the comparator 20 is connected.
  • the output of the comparator 20 when the comparator 20 is in an operating state, when the voltage value of the battery to be tested is lower than the voltage value across the second resistor R2, the output of the comparator 20 outputs a low level signal. At this time, the LED of the LED is in a lighting state (ie, indicating that the battery is insufficient); when the voltage of the battery to be tested is higher than the voltage across the second resistor R2, the output of the comparator 20 outputs a high level signal. At this time, the LED of the LED is in the off state (ie, the battery is fully charged).
  • the boosting circuit 40 includes a boosting chip 41 and a first inductor L, and the input terminal SW of the boosting chip 41 passes the first inductor L and the standby The positive terminal of the battery is connected, the power terminal VCC is connected to the positive pole of the battery to be tested, the enable terminal EN is connected to the delay circuit 50, and the output terminal VOUT is the output end of the booster circuit 40.
  • the booster circuit 40 further includes a first capacitor C1, one end of the first capacitor C1 is connected to the output end of the boosting chip 41, and the other end is connected. Ground connection.
  • the boosting circuit 40 further includes a second capacitor C2.
  • One end of the second capacitor C2 is connected to the power terminal of the boosting chip 41, and the other end is connected to the ground.
  • the boosting chip 41 when the voltage of the enable terminal EN of the boosting chip 41 is at a high level, the boosting chip 41 is in an operating state, and an output voltage can be generated; when the voltage of the enabling terminal EN of the boosting chip 41 is At the low level, the booster chip 41 is in a stopped state, and no output voltage is generated.
  • the signal of the boosting chip 41 can be set according to actual needs, for example, the boosting chip.
  • 41 can be a boost chip of the SGM6603-5V, that is, a booster chip that boosts the battery voltage of 3V to 5V.
  • the first leg of the boosting chip 41 is an input terminal
  • the second leg is a ground terminal
  • the third leg is an enable terminal
  • the fourth leg is a feedback terminal
  • the fifth leg is an output terminal
  • the sixth leg is a power terminal.
  • energy is stored by the inductor L, and after being boosted by the boosting chip 41, the output of the boosting chip 41 can be outputted with a voltage of 5V.
  • the delay circuit includes a fourth resistor R4, a fifth resistor R5, and a third capacitor C3, and the first end of the fourth resistor R4 and the boosting chip 41
  • the enable terminal is connected, the second end is connected to the ground through the fifth resistor R5; the third capacitor C3 is connected in parallel to the two ends of the fifth resistor R5.
  • the third capacitor C3 is connected in parallel to the two ends of the fifth resistor R5 to form an RC delay circuit structure, and the fourth resistor R4 is used for current limiting.
  • the fourth resistor R4 is used for current limiting.
  • the delay circuit further includes a first diode D1 and a second diode D2, the button includes a first knob button and a second knob button, the first pole
  • the anode of the tube D1 is connected to the first knob button, the cathode is connected to the first end of the fourth resistor R4, and when the first knob button is pressed, the first diode D1 is guided.
  • the anode of the second diode D2 is connected to the second knob button, the cathode is connected to the first end of the fourth resistor R4, and when the second knob button is pressed, the The second diode D2 is turned on.
  • the first knob button includes at least two connecting ends, wherein one of the connecting ends is provided with a high level voltage (for example, connected to the positive pole of the battery), and the other connecting end is connected to the first diode D1.
  • the anode is connected; when the first knob button is not pressed, the anode of the first diode D1 is equivalent to a floating state, and when the first knob button is pressed, the anode of the first diode D1 is connected to the high level. .
  • the second knob button comprises at least two connecting ends, wherein one of the connecting ends is provided with a high level voltage (for example, connected to the positive pole of the battery), and the other connecting end is connected with the anode of the second diode D2;
  • a high level voltage for example, connected to the positive pole of the battery
  • the other connecting end is connected with the anode of the second diode D2;
  • the present invention also provides a gas stove, which includes a power detecting circuit.
  • the structure of the power detecting circuit can be referred to the above embodiment, and details are not described herein again.
  • the gas cooker of the embodiment adopts the technical solution of the above-described electric quantity detecting circuit, the gas cooker has all the beneficial effects of the above electric quantity detecting circuit.

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Abstract

一种电量检测电路及燃气灶，该电量检测电路包括电压采样电路（10）、比较器（20）、限流电阻（30）、升压电路（40）和延时电路（50），其中，电压采样电路（10）用于采集升压电路（40）输出端（40。）的电压；比较器（20）的反相输入端和同相输入端中一者与电压采样电路（10）的输出端连接，另一者通过限流电阻（30）与待测电池的正极连接，以检测待测电池的电压是否低于预设值，比较器（20）的电源端与升压电路（40）的输出端（40。）连接；升压电路（40）的输入端与待测电池的正极连接；延时电路（50）与预置的按键开关连接，用于当按键按下后，控制升压电路（40）在预置时间段内产生输出电压。该电路降低了电量检测的功耗，延长了电池的使用寿命。

Description

电量检测电路及燃气灶
相关申请的交叉引用
本申请要求中国专利申请号201520921869.X、申请日为2015年11月17日以及中国专利申请号201510791332.0、申请日为2015年11月17日的优先权，该中国专利申请的全部内容在此引入本申请作为参考。
技术领域
本发明涉及燃气灶技术领域，尤其涉及电量检测电路及燃气灶。
背景技术
众所周知，现有燃气灶中通常设有电量检测电路以对电池的电量进行检测，在电量较低时输出相应的提示信息以提醒用户更换电池，保证燃气灶的正常工作。但是，在传统的电量检测电路中，电量检测电路实时处于检测状态，因此使得功耗较大，影响电池的使用寿命。
申请内容
本发明的主要目的在于提供一种电量检测电路及燃气灶，旨在降低电量检测的功耗，延长电池的使用寿命。
为了实现上述目的，本发明提供一种电量检测电路，所述电量检测电路包括电压采样电路、比较器、限流电阻、升压电路和延时电路，其中，所述电压采样电路用于采集所述升压电路输出端的电压；所述比较器的反相输入端和同相输入端中一者与所述电压采样电路的输出端连接，另一者通过限流电阻与待测电池的正极连接，以检测所述待测电池的电压是否低于预设值，所述比较器的电源端与所述升压电路的输出端连接；所述升压电路的输入端与所述待测电池的正极连接；所述延时电路与预置的按键开关连接，用于当所述按键按下后，控制所述升压电路在预置时间段内产生输出电压。
优选地，所述电压采样电路包括第一电阻和第二电阻，所述第一电阻的一端与所述升压电路的输出端连接，另一端与所述比较器的反相输入端连接；所述第二电阻的一端与所述比较器的反相输入端连接，另一端接地。
优选地，所述电量检测电路还包括第三电阻和发光二极管，其中所述发光二极管的阳极与所述升压电路的输出端连接，阴极通过所述第三电阻与所述比较器的输出端连接。
优选地，所述升压电路包括升压芯片和第一电感，所述升压芯片的输入端通过所述第一电感与所述待测电池的正极连接，电源端与所述待测电池的正极连接，使能端与所述延 时电路连接，输出端为所述升压电路的输出端。
优选地，所述升压电路还包括第一电容，所述第一电容的一端与所述升压芯片的输出端连接，另一端接地连接。
优选地，所述升压电路还包括第二电容，所述第二电容的一端与所述升压芯片的电源端连接，另一端接地连接。
优选地，所述延时电路包括第四电阻、第五电阻和第三电容，所述第四电阻的第一端与所述升压芯片的使能端连接，第二端通过第五电阻接地连接；所述第三电容并联于所述第五电阻的两端。
优选地，所述延时电路还包括第一二极管和第二二极管，所述预置的按键包括第一旋钮按键和第二旋钮按键，所述第一二极管的阳极与所述第一旋钮按键连接，阴极与所述第四电阻的第一端连接，并当所述第一旋钮按键按下接通时，所述第一二极管导通；所述第二二极管的阳极与所述第二旋钮按键连接，阴极与所述第四电阻的第一端连接，并当所述第二旋钮按键按下接通时，所述第二二极管导通。
此外，为实现上述目的，本发明还提供一种燃气灶，所述燃气灶电量检测电路，所述电量检测电路包括电压采样电路、比较器、限流电阻、升压电路和延时电路，其中，所述电压采样电路用于采集所述升压电路输出端的电压；所述比较器的反相输入端和同相输入端中一者与所述电压采样电路的输出端连接，另一者通过限流电阻与待测电池的正极连接，以检测所述待测电池的电压是否低于预设值，所述比较器的电源端与所述升压电路的输出端连接；所述升压电路的输入端与所述待测电池的正极连接；所述延时电路与预置的按键开关连接，用于当所述按键按下后，控制所述升压电路在预置时间段内产生输出电压。
本发明实施例通过采用以下电路结构，电量检测电路包括电压采样电路、比较器、限流电阻、升压电路和延时电路，其中，所述电压采样电路用于采集所述升压电路输出端的电压；所述比较器的反相输入端和同相输入端中一者与所述电压采样电路的输出端连接，另一者通过限流电阻与待测电池的正极连接，以检测所述待测电池的电压是否低于预设值，所述比较器的电源端与所述升压电路的输出端连接；所述升压电路的输入端与所述待测电池的正极连接；所述延时电路与预置的按键开关连接，用于当所述按键按下后，控制所述升压电路在预置时间段内产生输出电压。从而可以在燃气灶点火的瞬间进行电量检测，在未进行电量检测时，电量检测电路的功耗为零，因此本发明降低电量检测的功耗，延长了电池的使用寿命。
附图说明
为了更清楚地说明本发明实施例或现有技术中的技术方案，下面将对实施例或现有技 术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本发明的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图示出的结构获得其他的附图。
图1为根据本发明示例性实施例的电量检测电路的电路结构示意图。
本发明目的的实现、功能特点及优点将结合实施例，参照附图做进一步说明。
附图标号说明：
标号 名称 标号 名称
10 电压采样电路 R5 第五电阻
20 比较器 41 升压芯片
30 限流电阻 L 第一电感
40 升压电路 C1 第一电容
50 延时电路 C2 第二电容
R1 第一电阻 C3 第三电容
R2 第二电阻 D1 第一二极管
R3 第三电阻 D2 第二二极管
R4 第四电阻    
具体实施方式
应当理解，此处所描述的具体实施例仅仅用以解释本发明，并不用于限定本发明。
下面将结合本发明实施例中的附图，对本发明实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本发明的一部分实施例，而不是全部的实施例。基于本发明中的实施例，本领域普通技术人员在没有作出创造性劳动前提下所获得的所有其他实施例，都属于本发明保护的范围。
需要说明，本发明实施例中所有方向性指示(诸如上、下、左、右、前、后……)仅用于解释在某一特定姿态(如附图所示)下各部件之间的相对位置关系、运动情况等，如果该特定姿态发生改变时，则该方向性指示也相应地随之改变。
另外，在本发明中涉及“第一”、“第二”等的描述仅用于描述目的，而不能理解为指示或暗示其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至少一个该特征。另外，各个实施例之间的技术方案可以相互结合，但是必须是以本领域普通技术人员能够实现为基础，当技术方案的结合出现相互矛盾或无法实现时应当认为这种技术方案的结合不存在，也不在本发明要求的保护范围之内。
图1为根据本发明示例性实施例的电量检测电路的电路结构示意图，参照图1，在一实施例中，该电量检测电路包括电压采样电路10、比较器20、限流电阻30、升压电路40和延时电路50，其中，所述电压采样电路10用于采集所述升压电路40输出端40o的电压；所述比较器20的反相输入端和同相输入端中一者与所述电压采样电路10的输出端连接，另一者通过限流电阻30与待测电池的正极连接，以检测所述待测电池的电压是否低于预设值，所述比较器20的电源端与所述升压电路40的输出端40o连接；所述升压电路40的输入端与所述待测电池的正极(VBAT)连接；所述延时电路50与预置的按键开关连接，用于当所述按键按下后，控制所述升压电路40在预置时间段内产生输出电压。
本实施例提供的电路检测电路主要应用于燃气灶中，用于对燃气灶中的电池电量进行检测。具体地，上述按键可以为燃气灶用于打火用的旋钮按键。
上述电压采样电路10的输出端及待测电池的正极与比较器20的反相输入端和同相输入端的连接方式可以根据实际需要进行设置，例如在一实施例中，电压采样电路10的输出端可以与比较器20的反相输入端连接，待测电池的正极与比较器20的同相输入端连接；在另一实施例中，电压采样电路10的输出端可以与比较器20的同相输入端连接，待测电池的正极与比较器20的反相输入端连接。具体地，上述预设值为电压采样电路10采样后的电压比较值，即上述比较器20用于比较待测电池电压和电压采样电路10采样后的电压比较值的大小关系，然后从比较器20的输出端输出相应的电平信息，根据该电平信息即可获得电量信息。
上述延时电路50用于接收按键传输过来的电压信号，当接收到高电平信号时，升压电路40开始工作，对待测电池的电压进行升压，升压后输出到比较器20的电源端，以控制比较器20开始工作。此时，通过比较器20的同相输入端和反相输入端的电压比较，从而确定待测电池的电量信息。当按键被释放后，按键停止输入高电平电压，此时延时电路进行放电，当放电到一定程度后，升压电路40将停止工作，此时，则升压电路40无输出电压，比较器20停止工作，从而停止对待测电池的电量检测。
本发明实施例通过采用以下电路结构，电量检测电路包括电压采样电路10、比较器20、限流电阻30、升压电路40和延时电路50，其中，所述电压采样电路10用于采集所述升压电路40输出端的电压；所述比较器20的反相输入端和同相输入端中一者与所述电压采样电路10的输出端连接，另一者通过限流电阻30与待测电池的正极连接，以检测所述待测电池的电压是否低于预设值，所述比较器20的电源端与所述升压电路40的输出端连接；所述升压电路40的输入端与所述待测电池的正极(VBAT)连接；所述延时电路50与预置的按键开关连接，用于当所述按键按下后，控制所述升压电路40在预置时间段内产生输出电压。从而可以在燃气灶点火的瞬间进行电量检测，在未进行电量检测时，电量检测电路的功耗为零，因此本发明降低电量检测的功耗，延长了电池的使用寿命。
具体地，上述电压采样电路的结构可以根据实际需要进行设置，本实施例中，上述电压采样电路包括第一电阻R1和第二电阻R2，所述第一电阻R1的一端与所述升压电路40的输出端连接，另一端与所述比较器20的反相输入端连接；所述第二电阻R2的一端与所述比较器20的反相输入端连接，另一端接地。
本实施例中，上述第一电阻R1和第二电阻R2的阻值大小可以根据实际需要进行设置。具体地，上述电压比较值为第二电阻R2两端的电压值。在所述比较器20处于工作状态下，当待测电池的电压值低于第二电阻R2两端的电压值时，所述比较器20的输出端将输出低电平信号；当待测电池的电压值高于第二电阻R2两端的电压值时，所述比较器20的输出端将输出高电平信号。
可以理解的是，基于上述实施例，本实施例中，对于电量检测后的提醒电路结构可以根据实际需要进行设置。本实施例优选地，上述电量检测电路还包括第三电阻R3和发光二极管LED，其中所述发光二极管LED的阳极与所述升压电路40的输出端连接，阴极通过所述第三电阻R3与所述比较器20的输出端连接。
在本实施例中在所述比较器20处于工作状态下，当待测电池的电压值低于第二电阻R2两端的电压值时，所述比较器20的输出端将输出低电平信号，此时发光二极管LED处于亮灯状态(即表示电池电量不足)；当待测电池的电压值高于第二电阻R2两端的电压值时，所述比较器20的输出端将输出高电平信号，此时发光二极管LED处于灭灯状态(即表示电池电量充足)。
可以理解的是，在其他实施例中，当上述比较器20的同相输入端和反相输入端的连接状态交换时，则发光二极管LED的亮灯状态也随之改变。
进一步地，基于上述实施例，本实施例中，上述升压电路40包括升压芯片41和第一电感L，所述升压芯片41的输入端SW通过所述第一电感L与所述待测电池的正极连接，电源端VCC与所述待测电池的正极连接，使能端EN与所述延时电路50连接，输出端VOUT为所述升压电路40的输出端。
本实施例中，为了提高输入电压的稳定性，优选地，上述升压电路40还包括第一电容C1，所述第一电容C1的一端与所述升压芯片41的输出端连接，另一端接地连接。
此外，为了提高输出电压的稳定性，优选地，上述升压电路40还包括第二电容C2，所述第二电容C2的一端与所述升压芯片41的电源端连接，另一端接地连接。
本实施例中，当上述升压芯片41的使能端EN的电压为高电平时，上述升压芯片41处于工作状态，可以产生输出电压；当升压芯片41的使能端EN的电压为低电平时，上述升压芯片41处于停止工作的状态，没有产生输出电压。
本实施例中，上述升压芯片41的信号可以根据实际需要进行设置，例如，该升压芯片 41可以为SGM6603-5V的升压芯片，即将3V的电池电压提升至5V电压的升压芯片。该升压芯片41中第一脚为输入端、第二脚为接地端、第三脚为使能端、第四脚为反馈端、第五脚为输出端、第六脚为电源端。工作时，通过电感L进行储能，在经过升压芯片41升压后，可以使得升压芯片41的输出端输出5V的电压。
进一步地，基于上述实施例，本实施例中，上述延时电路包括第四电阻R4、第五电阻R5和第三电容C3，所述第四电阻R4的第一端与所述升压芯片41的使能端连接，第二端通过第五电阻R5接地连接；所述第三电容C3并联于所述第五电阻R5的两端。
本实施例中，上述第三电容C3并联于所述第五电阻R5的两端形成RC延时电路结构，上述第四电阻R4用于限流。当上述按键接通时，在第四电阻R4和第五电阻R5的公共端形成高电平，此时升压芯片41开始工作；当按键断开后，第三电容C3开始放电，放电一段时间后，使得第四电阻R4和第五电阻R5的公共端由高电平变为低电平，从而使得升压芯片41停止工作，即升压芯片41无输出电压。
进一步地，在燃气灶中通常设有两个按钮，为满足任何一个按钮按下时，都可以进行电池电量的检测。基于上述实施例，本实施例中，上述延时电路还包括第一二极管D1和第二二极管D2，所述按键包括第一旋钮按键和第二旋钮按键，所述第一二极管D1的阳极与所述第一旋钮按键连接，阴极与所述第四电阻R4的第一端连接，并当所述第一旋钮按键按下接通时，所述第一二极管D1导通；所述第二二极管D2的阳极与所述第二旋钮按键连接，阴极与所述第四电阻R4的第一端连接，并当所述第二旋钮按键按下接通时，所述第二二极管D2导通。
本实施例中，上述第一旋钮按键至少包括两连接端，其中一连接端上设有高电平电压(例如与电池的正极连接)，另一连接端与所述第一二极管D1的阳极连接；在第一旋钮按键未被按下时，第一二极管D1的阳极相当于悬空状态，在第一旋钮按键被按下时，第一二极管D1的阳极接入高电平。上述第二旋钮按键至少包括两连接端，其中一连接端上设有高电平电压(例如与电池的正极连接)，另一连接端与所述第二二极管D2的阳极连接；在第二旋钮按键未被按下时，第二二极管D2的阳极相当于悬空状态，在第二旋钮按键被按下时，第二二极管D2的阳极接入高电平。
本发明还提供一种燃气灶，该燃气灶包括电量检测电路，该电量检测电路的结构可参照上述实施例，在此不再赘述。理所应当地，由于本实施例的燃气灶采用了上述电量检测电路的技术方案，因此该燃气灶具有上述电量检测电路所有的有益效果。
以上仅为本发明的优选实施例，并非因此限制本发明的专利范围，凡是利用本发明说 明书及附图内容所作的等效结构或等效流程变换，或直接或间接运用在其他相关的技术领域，均同理包括在本发明的专利保护范围内。

Claims (9)

  1. 一种电量检测电路，其特征在于，所述电量检测电路包括电压采样电路、比较器、限流电阻、升压电路和延时电路，其中，所述电压采样电路用于采集所述升压电路输出端的电压；所述比较器的反相输入端和同相输入端中一者与所述电压采样电路的输出端连接，另一者通过限流电阻与待测电池的正极连接，以检测所述待测电池的电压是否低于预设值，所述比较器的电源端与所述升压电路的输出端连接；所述升压电路的输入端与所述待测电池的正极连接；所述延时电路与预置的按键开关连接，用于当所述按键按下后，控制所述升压电路在预置时间段内产生输出电压。
  2. 如权利要求1所述的电量检测电路，其特征在于，所述电压采样电路包括第一电阻和第二电阻，所述第一电阻的一端与所述升压电路的输出端连接，另一端与所述比较器的反相输入端连接；所述第二电阻的一端与所述比较器的反相输入端连接，另一端接地。
  3. 如权利要求2所述的电量检测电路，其特征在于，所述电量检测电路还包括第三电阻和发光二极管，其中所述发光二极管的阳极与所述升压电路的输出端连接，阴极通过所述第三电阻与所述比较器的输出端连接。
  4. 如权利要求1-3中任一项所述的电量检测电路，其特征在于，所述升压电路包括升压芯片和第一电感，所述升压芯片的输入端通过所述第一电感与所述待测电池的正极连接，电源端与所述待测电池的正极连接，使能端与所述延时电路连接，输出端为所述升压电路的输出端。
  5. 如权利要求4所述的电量检测电路，其特征在于，所述升压电路还包括第一电容，所述第一电容的一端与所述升压芯片的输出端连接，另一端接地连接。
  6. 如权利要求4或5所述的电量检测电路，其特征在于，所述升压电路还包括第二电容，所述第二电容的一端与所述升压芯片的电源端连接，另一端接地连接。
  7. 如权利要求4-6中任一项所述的电量检测电路，其特征在于，所述延时电路包括第 四电阻、第五电阻和第三电容，所述第四电阻的第一端与所述升压芯片的使能端连接，第二端通过第五电阻接地连接；所述第三电容并联于所述第五电阻的两端。
  8. 如权利要求7所述的电量检测电路，其特征在于，所述延时电路还包括第一二极管和第二二极管，所述预置的按键包括第一旋钮按键和第二旋钮按键，所述第一二极管的阳极与所述第一旋钮按键连接，阴极与所述第四电阻的第一端连接，并当所述第一旋钮按键按下接通时，所述第一二极管导通；所述第二二极管的阳极与所述第二旋钮按键连接，阴极与所述第四电阻的第一端连接，并当所述第二旋钮按键按下接通时，所述第二二极管导通。
  9. 一种燃气灶，其特征在于，包括如权利要求1至8中任一项所述的电量检测电路。
PCT/CN2016/100371 2015-11-17 2016-09-27 电量检测电路及燃气灶 WO2017084436A1 (zh)

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