CN115413087A - Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle - Google Patents

Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle Download PDF

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Publication number
CN115413087A
CN115413087A CN202211065423.2A CN202211065423A CN115413087A CN 115413087 A CN115413087 A CN 115413087A CN 202211065423 A CN202211065423 A CN 202211065423A CN 115413087 A CN115413087 A CN 115413087A
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CN
China
Prior art keywords
led lamp
resistor
triode
switching circuit
circuit
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Granted
Application number
CN202211065423.2A
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Chinese (zh)
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CN115413087B (en
Inventor
吴伟
余瑞兴
陈合金
何先成
朱冠达
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Guangdong Cawolo Hydrogen Technology Co Ltd
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Guangdong Cawolo Hydrogen Technology Co Ltd
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Priority to CN202211065423.2A priority Critical patent/CN115413087B/en
Publication of CN115413087A publication Critical patent/CN115413087A/en
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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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/34—Voltage stabilisation; Maintaining constant voltage
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01K—MEASURING TEMPERATURE; MEASURING QUANTITY OF HEAT; THERMALLY-SENSITIVE ELEMENTS NOT OTHERWISE PROVIDED FOR
    • G01K7/00—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements
    • G01K7/16—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements
    • G01K7/22—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor
    • G01K7/24—Measuring temperature based on the use of electric or magnetic elements directly sensitive to heat ; Power supply therefor, e.g. using thermoelectric elements using resistive elements the element being a non-linear resistance, e.g. thermistor in a specially-adapted circuit, e.g. bridge circuit
    • 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
    • H05B45/00—Circuit arrangements for operating light-emitting diodes [LED]
    • H05B45/30—Driver circuits
    • H05B45/37—Converter circuits
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/105—Controlling the light source in response to determined parameters
    • H05B47/14—Controlling the light source in response to determined parameters by determining electrical parameters of the light source
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/165—Controlling the light source following a pre-assigned programmed sequence; Logic control [LC]
    • 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
    • H05B47/00—Circuit arrangements for operating light sources in general, i.e. where the type of light source is not relevant
    • H05B47/10—Controlling the light source
    • H05B47/17—Operational modes, e.g. switching from manual to automatic mode or prohibiting specific operations

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  • Physics & Mathematics (AREA)
  • Nonlinear Science (AREA)
  • General Physics & Mathematics (AREA)
  • Measurement Of Levels Of Liquids Or Fluent Solid Materials (AREA)

Abstract

The invention provides a temperature detection and LED lamp switching circuit, which comprises: the two ends of the NTC terminal are respectively connected with the temperature probe and the two ends of the LED lamp strip; the microcontroller MCU is used for outputting a level signal; a base electrode of the triode Q4 is connected with the signal output end of the microcontroller MCU, and an emitting electrode of the triode Q4 is connected with a common end; and the gate pole of the MOS tube Q5 is connected with the signal output end of the microcontroller MCU, the drain electrode of the MOS tube Q5 and the collector electrode of the triode Q4 are connected with the anode of the LED lamp strip and the cathode of the diode D3, and the anode of the diode D3 is connected with one end of the NTC terminal. When the water temperature is detected, the circuit is prevented from having voltage drop, so that the detection result of the temperature probe on the NCT terminal is more accurate.

Description

Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle
Technical Field
The invention relates to a temperature detection and LED lamp switching circuit, in particular to a temperature detection and LED lamp switching circuit and a hydrogen-rich kettle.
Background
The hydrogen-rich kettle is a relatively common device for producing hydrogen and heating in the field of small household appliances. Among the prior art, temperature detect with heating plate LED lamp is connected, can influence each other when realizing different functions (for example temperature detect and heating plate LED lamp), promptly when carrying out temperature detection, the LED lamp also works simultaneously, leads to the circuit to have the pressure drop problem, leads to the temperature that temperature probe acquireed to have the error.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a temperature detection and LED lamp switching circuit and a hydrogen-rich kettle, which can ensure that the water temperature detection and the working state of an LED circuit are opposite, and when a temperature probe works, the LED lamp control circuit is cut off; when the LED lamp control circuit works, the temperature probe stops working.
The technical scheme of the invention is realized as follows:
a temperature detection and LED lamp switching circuit, comprising: two ends of the NTC terminal are respectively connected with the temperature probe and two ends of the LED lamp strip; a microcontroller MCU for outputting a level signal; a base electrode of the triode Q4 is connected with the signal output end of the microcontroller MCU, and an emitting electrode of the triode Q4 is connected with a common end; the gate pole of the MOS tube Q5 is connected with the signal output end of the microcontroller MCU, the drain pole of the MOS tube Q5 and the collector pole of the triode Q4 are connected with the anode of the LED lamp strip and the cathode of the diode D3, and the anode of the diode D3 is connected with one end of the NTC terminal; when the microcontroller MCU outputs a high level signal, the triode Q4 is controlled to be switched on, the MOS tube Q5 is switched off, the temperature probe detects water Wen Canshu, and the LED lamp strip is switched off; when the microcontroller MCU outputs a low level signal, the MOS tube Q5 is controlled to be switched on, the triode Q4 is cut off, the temperature probe stops detecting, and the LED lamp band works.
In a further embodiment, the transistor further includes a first resistor R17, one end of the first resistor R17 is connected to the signal output terminal of the microcontroller MCU, and the other end of the first resistor R17 is coupled to the gate of the MOS transistor Q5.
Further, the source electrode of the MOS transistor Q5 is connected to a 5V power supply.
Furthermore, the micro-controller further comprises a second resistor R18, one end of the second resistor R18 is connected with the signal output end of the micro-controller MCU, and the other end of the second resistor R18 is connected with the base electrode of the triode Q4.
Further, the MOS transistor Q5 is configured as an N-channel MOS transistor or a P-channel MOS transistor.
Preferably, the LED lamp further comprises a reset circuit, and a reset end of the reset circuit is respectively connected with the NTC terminal and a cathode of the LED lamp strip; the reset circuit comprises a resistor R32 and a capacitor C13, two ends of the resistor R32 are respectively connected with the 5V power supply and the capacitor C13, and the other end of the capacitor C13 is connected with a common end.
Preferably, the microcontroller further comprises a resistor R31, and two ends of the resistor R31 are electrically connected with the microcontroller MCU and the NTC terminal respectively.
Preferably, the device further comprises a resistor R33, wherein one end of the resistor R33 is coupled to the drain of the MOS transistor Q5, and the other end is connected to the NTC terminal.
The invention also provides a hydrogen-rich water kettle which comprises any one of the temperature detection and LED lamp switching circuits.
Compared with the prior art, the invention has the following advantages.
When the temperature probe feeds back a water temperature signal, the microcontroller MCU applies a high level signal to the signal output end, the high level signal is input into the base electrode of the triode Q4 and the gate electrode of the MOS tube Q5 through the resistor R18, the triode Q4 is conducted, the MOS tube Q5 is cut off, at the moment, the anode of the LED lamp strip is grounded, and the LED lamp strip does not work; the NTC terminal is grounded through an emitting electrode of the triode Q4, a temperature probe connected with the NTC terminal works, and a temperature signal is fed back to the MCU through the resistor R31.
When the LED lamp strip control circuit works, the microcontroller MCU applies a low level signal to the signal output end, the low level signal is input into the base electrode of the triode Q4 and the gate pole of the MOS tube through the resistor R18, the MOS tube is conducted, the triode Q4 is cut off, at the moment, the anode of the LED lamp strip is at a high level, the LED lamp strip is conducted, and the temperature probe on the NTC terminal does not work.
The LED lamp strip control circuit has the advantages that the LED lamp strip control circuit is cut off when the temperature probe works; when the LED lamp belt control circuit works, the temperature probe stops working, and the circuit is prevented from having a voltage drop when water temperature detection is carried out, so that the detection result of the temperature probe on the NCT terminal is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a circuit diagram of a temperature detection and LED lamp switching circuit according to the present invention;
FIG. 2 is a circuit diagram of the MCU of the microprocessor of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is apparent that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," "fourth," and the like are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Referring to fig. 1 to 2, an embodiment of the present invention discloses a temperature detection and LED lamp switching circuit, including: two ends of the NTC terminal are respectively connected with the temperature probe and two ends of the LED lamp strip; a microcontroller MCU for outputting a level signal; a base electrode of the triode Q4 is connected with the signal output end of the microcontroller MCU, and an emitting electrode of the triode Q4 is connected with a common end; a gate pole of the MOS transistor Q5 is connected with a signal output end of the microcontroller MCU, a drain pole of the MOS transistor Q5 and a collector pole of the triode Q4 are connected with an anode of the LED lamp strip and a cathode of the diode D3, and an anode of the diode D3 is connected with one end of the NTC terminal; when the microcontroller MCU outputs a high level signal, the triode Q4 is controlled to be switched on, the MOS tube Q5 is switched off, the temperature probe detects water Wen Canshu, and the LED lamp strip is switched off; when the microcontroller MCU outputs a low level signal, the MOS tube Q5 is controlled to be switched on, the triode Q4 is cut off, the temperature probe stops detecting, and the LED lamp band works.
Specifically, when the water temperature detection work is required, a high level signal is applied to the signal output end, the high level signal is input into the base electrode of the triode Q4 and the gate pole of the MOS tube through the resistor R18, the triode Q4 is conducted, the MOS tube is cut off, at the moment, the anode of the LED lamp strip is grounded, and the LED lamp strip does not work.
The temperature probe on the NTC terminal forms a loop, namely the emitter of the triode Q4 is grounded, and the temperature signal is fed back to the MCU through the resistor R31.
When the LED lamp strip control circuit works, a low level signal is applied to the signal output end, the low level signal is input into the base electrode of the triode Q4 and the gate pole of the MOS tube through the resistor R18, the MOS tube is conducted, the triode Q4 is cut off, at the moment, the anode of the LED lamp strip is at a high level, the LED lamp strip is conducted, and the temperature probe on the NTC terminal does not work.
In a further embodiment, the transistor further includes a first resistor R17, one end of the first resistor R17 is connected to the signal output terminal of the microcontroller MCU, and the other end of the first resistor R17 is coupled to the gate of the MOS transistor Q5.
In a further embodiment, the source of the MOS transistor Q5 is connected to a 5V power supply.
In a further implementation manner, the micro-controller further comprises a second resistor R18, one end of the second resistor R18 is connected with the signal output end of the microcontroller MCU, and the other end of the second resistor R18 is connected with the base of the triode Q4.
In a further embodiment, the MOS transistor Q5 is configured as an N-channel MOS transistor or a P-channel MOS transistor.
In a preferred embodiment, the LED lamp further comprises a reset circuit, wherein a reset end of the reset circuit is connected to the NTC terminal and a cathode of the LED lamp strip respectively; the reset circuit comprises a resistor R32 and a capacitor C13, two ends of the resistor R32 are respectively connected with the 5V power supply and the capacitor C13, and the other end of the capacitor C13 is connected with a common end.
In a preferred embodiment, the microcontroller further comprises a resistor R31, and two ends of the resistor R31 are electrically connected with the microcontroller MCU and the NTC terminal respectively.
In a preferred embodiment, the apparatus further includes a resistor R33, one end of the resistor R33 is coupled to the drain of the MOS transistor Q5, and the other end is connected to the NTC terminal.
In a preferred embodiment, a diode D3 is further disposed between the NTC terminal and the collector of the transistor Q4, so as to prevent reverse current from breaking down the temperature probe.
In fig. 1 of this embodiment, the transistor Q4 is configured as an NPN transistor, but a PNP transistor may also be used when applied; the MOS tube Q5 is configured as a P-channel MOS tube, and an N-channel MOS tube can also be adopted during application.
The invention further provides a hydrogen-rich water kettle which comprises any one of the temperature detection and LED lamp switching circuits, can achieve all the beneficial effects brought by the implementation mode, and is not repeated herein.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.

Claims (9)

1. A temperature detection and LED lamp switching circuit, characterized by comprising:
two ends of the NTC terminal are respectively connected with the temperature probe and two ends of the LED lamp strip;
a microcontroller MCU for outputting a level signal;
a base electrode of the triode Q4 is connected with the signal output end of the microcontroller MCU, and an emitting electrode of the triode Q4 is connected with a common end;
the gate pole of the MOS tube Q5 is connected with the signal output end of the microcontroller MCU, the drain pole of the MOS tube Q5 and the collector pole of the triode Q4 are connected with the anode of the LED lamp strip and the cathode of the diode D3, and the anode of the diode D3 is connected with one end of the NTC terminal;
when the microcontroller MCU outputs a high level signal, the triode Q4 is controlled to be switched on, the MOS tube Q5 is switched off, the temperature probe detects water Wen Canshu, and the LED lamp strip is switched off;
when the microcontroller MCU outputs a low level signal, the MOS tube Q5 is controlled to be switched on, the triode Q4 is cut off, the temperature probe stops detecting, and the LED lamp band works.
2. The temperature sensing and LED lamp switching circuit of claim 1, wherein: the micro-controller MCU is characterized by further comprising a first resistor R17, one end of the first resistor R17 is connected with the signal output end of the micro-controller MCU, and the other end of the first resistor R17 is coupled to the gate pole of the MOS transistor Q5.
3. The temperature sensing and LED lamp switching circuit of claim 2, wherein: the circuit also comprises a second resistor R18, one end of the second resistor R18 is connected with the signal output end of the microcontroller MCU, and the other end of the second resistor R18 is connected with the base electrode of the triode Q4.
4. The temperature detecting and LED lamp switching circuit according to claim 3, wherein the MOS transistor Q5 is configured as an N-channel MOS transistor or a P-channel MOS transistor.
5. The circuit of claim 4, wherein the source of the MOS transistor Q5 is connected to a 5V power supply.
6. The temperature detection and LED lamp switching circuit of claim 1, wherein: the reset circuit is characterized by further comprising a reset circuit, wherein the reset end of the reset circuit is respectively connected with the NTC terminal and the cathode of the LED lamp strip;
the reset circuit comprises a resistor R32 and a capacitor C13, two ends of the resistor R32 are respectively connected with a 5V power supply and the capacitor C13, and the other end of the capacitor C13 is connected with a common end.
7. The temperature sensing and LED lamp switching circuit of claim 1, wherein: the MCU detection circuit also comprises a resistor R31, wherein two ends of the resistor R31 are respectively and electrically connected with the MCU and the NTC terminal.
8. The temperature detection and LED lamp switching circuit of claim 1, wherein: the MOS transistor further comprises a resistor R33, wherein one end of the resistor R33 is coupled to the drain electrode of the MOS transistor Q5, and the other end of the resistor R33 is connected with the NTC terminal.
9. A hydrogen-rich water kettle comprising the temperature detection and LED lamp switching circuit as claimed in any one of claims 1 to 8.
CN202211065423.2A 2022-09-01 2022-09-01 Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle Active CN115413087B (en)

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CN202211065423.2A CN115413087B (en) 2022-09-01 2022-09-01 Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle

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CN202211065423.2A CN115413087B (en) 2022-09-01 2022-09-01 Temperature detection and LED lamp switching circuit and hydrogen-rich water kettle

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CN115413087B CN115413087B (en) 2023-04-07

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11127065A (en) * 1997-08-19 1999-05-11 Harness Syst Tech Res Ltd Short-circuit fault detection circuit
CN107692817A (en) * 2016-08-08 2018-02-16 洪志标 A kind of Intelligent electric kettle with high-low water level detection
CN209694880U (en) * 2018-09-08 2019-11-29 葛佳 A kind of safety heat-preserving device of electric kettle
CN113286403A (en) * 2020-12-31 2021-08-20 深圳市晶扬科技有限公司 Switch switching control circuit of small night lamp and main lamp
CN114801976A (en) * 2022-05-12 2022-07-29 东风柳州汽车有限公司 Far and near light lamp control circuit

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH11127065A (en) * 1997-08-19 1999-05-11 Harness Syst Tech Res Ltd Short-circuit fault detection circuit
CN107692817A (en) * 2016-08-08 2018-02-16 洪志标 A kind of Intelligent electric kettle with high-low water level detection
CN209694880U (en) * 2018-09-08 2019-11-29 葛佳 A kind of safety heat-preserving device of electric kettle
CN113286403A (en) * 2020-12-31 2021-08-20 深圳市晶扬科技有限公司 Switch switching control circuit of small night lamp and main lamp
CN114801976A (en) * 2022-05-12 2022-07-29 东风柳州汽车有限公司 Far and near light lamp control circuit

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