CN218074520U - Electric kettle control circuit - Google Patents
Electric kettle control circuit Download PDFInfo
- Publication number
- CN218074520U CN218074520U CN202222277562.3U CN202222277562U CN218074520U CN 218074520 U CN218074520 U CN 218074520U CN 202222277562 U CN202222277562 U CN 202222277562U CN 218074520 U CN218074520 U CN 218074520U
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- control circuit
- circuit
- voltage
- resistor
- mcu controller
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
A control circuit of an electric kettle comprises an MCU controller, a heating wire for heating the kettle, a heating wire control circuit for controlling the heating wire, a zero-crossing control circuit, a fan for heat dissipation, a fan control circuit for controlling the fan, a power supply voltage reduction circuit, an MCU power supply circuit, a temperature probe sampling circuit for detecting the temperature of the kettle and a voltage sampling circuit for sampling the input voltage of a power supply; and a voltage signal of the power supply is input to the MCU controller through the heating wire control circuit and the zero-crossing control circuit in sequence, the voltage sampling circuit is connected with the MCU controller, and the temperature probe sampling circuit is connected with the MCU controller. A voltage sampling circuit is added, and the MCU controller controls the power supply to be switched off by acquiring an input voltage value and temperature data of the temperature probe and combining a control program of the MCU controller; a zero-crossing control circuit is added to monitor the voltage value in real time, and when the voltage crosses the zero point, the silicon controlled rectifier is controlled to be turned on, and the voltage is zero at the moment, so that the impact of sudden large voltage of the circuit on the silicon controlled rectifier is prevented.
Description
Technical Field
The utility model relates to a control circuit, especially an electric kettle control circuit.
Background
The electric kettle control circuit often controls the on-off of a power supply by arranging a temperature probe, the temperature probe is generally required to detect the temperature of 100 ℃ and then the temperature probe can trigger the temperature probe, the temperature probe detects the temperature of water in the kettle at the interval, so the detected temperature data can be delayed, namely, when the control circuit turns off the power supply, the temperature of the water does not really reach 100 ℃. Secondly, the controlled silicon of the control circuit is protected, and if the controlled silicon is turned on when the power voltage is at the maximum peak, certain damage can be caused to the controlled silicon.
Disclosure of Invention
The utility model aims to solve the technical problem that an electric kettle control circuit is provided, solve the problem of prior art temperature probe survey data time delay, solve the problem that the silicon controlled rectifier device receives the high voltage impact.
In order to solve the technical problem, the technical scheme of the utility model is that: a control circuit of an electric kettle comprises an MCU controller, a heating wire for heating the kettle, a heating wire control circuit for controlling the heating wire, a zero-crossing control circuit, a fan for heat dissipation, a fan control circuit for controlling the fan, a power supply voltage reduction circuit, an MCU power supply circuit, a temperature probe sampling circuit for detecting the temperature of the kettle and a voltage sampling circuit for sampling the input voltage of a power supply; the power supply supplies power for the heating wire through the heating wire control circuit, and the voltage signal of power loops through heating wire control circuit and zero passage control circuit and inputs to the MCU controller, and the power supplies power for the fan through power step-down circuit and fan control circuit, and the power supplies power for the MCU controller through power step-down circuit and MCU supply circuit, voltage sampling circuit is connected with the MCU controller, temperature probe sampling circuit is connected with the MCU controller. The utility model adds a voltage sampling circuit, the MCU controller controls the power supply to be turned off by acquiring the input voltage value, the temperature data of the temperature probe and combining the control program of the MCU controller, solves the problem of time delay only depending on the data of the temperature probe, and keeps the water in the kettle to reach 100 ℃; a zero-crossing control circuit is added to monitor the voltage value in real time, and when the voltage crosses the zero point, the silicon controlled rectifier is controlled to be turned on, and the voltage is zero at the moment, so that the impact of sudden large voltage of the circuit on the silicon controlled rectifier is prevented.
As an improvement, the model of the MCU controller is PTB0132XXS-SOP16.
As an improvement, the zero-cross control circuit comprises a silicon controlled rectifier TR1 and a zero-cross detection optocoupler U11, a live wire of a power supply is connected with 2 pins of the silicon controlled rectifier TR1, a zero line of the power supply is connected with 1 pin of the silicon controlled rectifier TR1, the live wire of the power supply is connected with 6 pins of the zero-cross detection optocoupler U11 through a resistor R7, the zero line of the power supply is respectively connected with 3 pins of the silicon controlled rectifier TR1 and 4 pins of the zero-cross detection optocoupler U11 through a resistor R10, 1 pin of the zero-cross detection optocoupler U11 is connected with a silicon controlled rectifier control pin of the MCU controller through a resistor R9, and 2 pins of the zero-cross detection optocoupler U11 are grounded.
As an improvement, the voltage sampling circuit comprises a resistor R3, a resistor R4, a resistor R5, a capacitor C2, a capacitor C3 and a capacitor C4, a live wire of the power supply sequentially passes through the diode, the resistor R3 and the resistor R4 to be connected with a voltage sampling pin of the MCU controller, the input end of the resistor R3 is grounded through the capacitor C4, the output end of the resistor R3 is grounded through the resistor R5, the input end of the resistor R4 is grounded through the capacitor C3, and the output end of the resistor R4 is grounded through the capacitor C2.
Compared with the prior art, the utility model the beneficial effect who brings is:
a voltage sampling circuit is added, and the MCU controller controls the power supply to be turned off by acquiring an input voltage value and temperature data of the temperature probe and combining a self control program, so that the problem of time delay depending on the data of the temperature probe is solved, and the water in the kettle is kept at 100 ℃; a zero-crossing control circuit is added to monitor the voltage value in real time, and when the voltage crosses the zero point, the silicon controlled rectifier is controlled to be turned on, and the voltage is zero at the moment, so that the impact of sudden large voltage of the circuit on the silicon controlled rectifier is prevented.
Drawings
Fig. 1 is a circuit block diagram of the present invention.
Fig. 2 is a schematic circuit diagram of the present invention.
Detailed Description
The present invention will be further explained with reference to the drawings.
As shown in fig. 1, a control circuit of an electric kettle comprises an MCU controller, a heating wire for heating the kettle, a heating wire control circuit for controlling the heating wire, a zero-crossing control circuit, a fan for heat dissipation, a fan control circuit for controlling the fan, a power supply voltage reduction circuit, an MCU power supply circuit, a temperature probe sampling circuit for detecting the temperature of the kettle, and a voltage sampling circuit for sampling the input voltage of the power supply. The power supply supplies power for the heating wire through the heating wire control circuit, and the voltage signal of power loops through heating wire control circuit and zero passage control circuit and inputs to the MCU controller, and the power supplies power for the fan through power step-down circuit and fan control circuit, and the power supplies power for the MCU controller through power step-down circuit and MCU supply circuit, voltage sampling circuit is connected with the MCU controller, temperature probe sampling circuit is connected with the MCU controller.
The model of the MCU controller is PTB0132XXS-SOP16.
As shown in fig. 2, zero cross control circuit includes silicon controlled rectifier TR1 and zero cross detection opto-coupler U11, the live wire of power is connected with 2 feet of silicon controlled rectifier TR1, the zero line of power is connected with 1 foot of silicon controlled rectifier TR1, the live wire of power passes through resistance R7 and is connected with 6 feet of zero cross detection opto-coupler U11, the zero line of power passes through resistance R10 and is connected with 3 feet of silicon controlled rectifier TR1 and 4 feet of zero cross detection opto-coupler U11 respectively, 1 foot of zero cross detection opto-coupler U11 passes through resistance R9 and is connected with the silicon controlled rectifier control foot of MCU controller, 2 feet ground connection of zero cross detection opto-coupler U11.
As shown in fig. 2, the voltage sampling circuit includes a resistor R3, a resistor R4, a resistor R5, a capacitor C2, a capacitor C3 and a capacitor C4, a live wire of the power supply sequentially passes through the diode, the resistor R3, the resistor R4 and a voltage sampling pin of the MCU controller, an input end of the resistor R3 is grounded through the capacitor C4, an output end of the resistor R3 is grounded through the resistor R5, an input end of the resistor R4 is grounded through the capacitor C3, and an output end of the resistor R4 is grounded through the capacitor C2.
The utility model adds a voltage sampling circuit, the MCU controller controls the power supply to be turned off by acquiring the input voltage value, the temperature data of the temperature probe and combining the control program of the MCU controller, solves the problem of time delay only depending on the data of the temperature probe, and keeps the water in the kettle to reach 100 ℃; a zero-crossing control circuit is added to monitor the voltage value in real time, and when the voltage crosses the zero point, the silicon controlled rectifier is controlled to be turned on, and the voltage is zero at the moment, so that the impact of sudden large voltage of the circuit on the silicon controlled rectifier is prevented.
Claims (4)
1. A control circuit of an electric kettle is characterized in that: the device comprises an MCU controller, a heating wire for heating the kettle, a heating wire control circuit for controlling the heating wire, a zero-crossing control circuit, a fan for heat dissipation, a fan control circuit for controlling the fan, a power supply voltage reduction circuit, an MCU power supply circuit, a temperature probe sampling circuit for detecting the temperature of the kettle and a voltage sampling circuit for sampling the input voltage of the power supply; the power supply supplies power for the heating wire through the heating wire control circuit, and the voltage signal of power loops through heating wire control circuit and zero passage control circuit and inputs to the MCU controller, and the power supplies power for the fan through power step-down circuit and fan control circuit, and the power supplies power for the MCU controller through power step-down circuit and MCU supply circuit, voltage sampling circuit is connected with the MCU controller, temperature probe sampling circuit is connected with the MCU controller.
2. The electric kettle control circuit of claim 1, wherein: the model of the MCU controller is PTB0132XXS-SOP16.
3. The electric kettle control circuit of claim 1, wherein: zero cross control circuit includes silicon controlled rectifier TR1 and zero cross detection opto-coupler U11, the live wire of power is connected with 2 feet of silicon controlled rectifier TR1, the zero line of power is connected with 1 foot of silicon controlled rectifier TR1, the live wire of power passes through resistance R7 and is connected with 6 feet of zero cross detection opto-coupler U11, the zero line of power passes through resistance R10 and is connected with 3 feet of silicon controlled rectifier TR1 and 4 feet of zero cross detection opto-coupler U11 respectively, 1 foot of zero cross detection opto-coupler U11 passes through resistance R9 and is connected with the silicon controlled rectifier control foot of MCU controller, 2 feet ground connection of zero cross detection opto-coupler U11.
4. The electric kettle control circuit of claim 1, wherein: the voltage sampling circuit comprises a resistor R3, a resistor R4, a resistor R5, a capacitor C2, a capacitor C3 and a capacitor C4, a live wire of the power supply sequentially passes through a diode, the resistor R3 and a voltage sampling pin of the resistor R4 and the MCU controller to be connected, the input end of the resistor R3 is grounded through the capacitor C4, the output end of the resistor R3 is grounded through the resistor R5, the input end of the resistor R4 is grounded through the capacitor C3, and the output end of the resistor R4 is grounded through the capacitor C2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222277562.3U CN218074520U (en) | 2022-08-29 | 2022-08-29 | Electric kettle control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222277562.3U CN218074520U (en) | 2022-08-29 | 2022-08-29 | Electric kettle control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218074520U true CN218074520U (en) | 2022-12-20 |
Family
ID=84449797
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222277562.3U Active CN218074520U (en) | 2022-08-29 | 2022-08-29 | Electric kettle control circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218074520U (en) |
-
2022
- 2022-08-29 CN CN202222277562.3U patent/CN218074520U/en active Active
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