Aromatherapy machine timing control circuit and method based on USB power supply state judgment

Abstract

The application discloses a kind of based on USB power supply state judgment's aromatherapy machine timing control circuit and method, including shell 1, atomization component 2, power management module 3, lithium battery 4, USB charging management chip 5, single-chip microcomputer (MCU) 6 and user input device 7.USB charging management chip is used to detect USB power supply state and charge lithium battery, and USB power supply signal is output to single-chip microcomputer. Single-chip microcomputer judges whether current is USB power supply and charges lithium battery according to the signal, and automatically switches timing-off function accordingly, realizes that aromatherapy machine is under the condition of USB power supply / charging Continuously work, under the condition that only by lithium battery power supply, it is automatically closed according to the timing time set by user.The application improves the intelligent level and user experience of aromatherapy machine.

Description

Technical Field

[0001] This invention relates to the field of aroma diffuser control technology, specifically to an aroma diffuser timing control circuit and control method based on USB power supply status determination. Background Technology

[0002] Existing aroma diffusers typically include a timer function to save energy and extend device lifespan. However, when continuously powered via USB and charging the internal lithium battery, users prefer the diffuser to operate continuously without being affected by the timer function. Currently, there is no aroma diffuser control circuit or method that can automatically identify the USB power supply status and intelligently switch the timer control strategy based on the lithium battery power supply and charging status. Summary of the Invention

[0003] Purpose of the invention: The purpose of this invention is to provide a control circuit and method for an aroma diffuser that can automatically identify the USB power supply status and combine it with a timing control strategy that intelligently switches between lithium battery power supply and charging status. This enables the aroma diffuser to work continuously when powered by USB (charging the lithium battery) and automatically shut down according to a preset timing strategy when powered only by the lithium battery, thereby improving the intelligence level of the aroma diffuser and the user experience.

[0004] Technical solution: To achieve the above objectives, the present invention adopts the following technical solution: An aroma diffuser control circuit includes: ● The outer casing, used to house the various functional modules; ● Atomizing component, used to atomize aromatherapy liquid into gas to achieve aromatherapy function; ● Power management module, used to switch between USB power supply and lithium battery power supply, and to charge the lithium battery and power the atomization components and control circuit; ● Lithium battery provides power for the aroma diffuser when it is not connected to USB; ● USB charging management chip, used to detect whether the aroma diffuser is currently powered by USB interface and charging lithium battery, and output USB power supply status signal; ● The microcontroller (MCU) is used to receive the power supply status signal from the USB charging management chip, determine the current power supply mode based on the signal, and automatically switch the timer shutdown function to be enabled or disabled, while controlling the start and stop of the atomizing component. ● User input devices (such as buttons) are used by users to set the on / off switch and timer for the timed shutdown function.

[0005] Its working methods include: ● S1: The MCU monitors the USB power supply status signal of the USB charging management chip in real time; ● S2: If a USB connection is detected and the lithium battery is being charged, the MCU will automatically cancel the timed shutdown function and control the atomizing component to continue working; ● S3: If the USB is not connected and only the lithium battery is powered, the MCU will resume the timed shutdown function and shut down the atomizing component according to the time set by the user. ● S4: The user can set the timer off function and the timer duration by pressing a button or using an external signal.

[0006] Beneficial effects: This invention, through the cooperation of a USB charging management chip, a power management module, and an MCU, realizes intelligent timer control of the aroma diffuser in both USB power supply / charging and independent lithium battery power supply modes, improving user experience and device adaptability, and has good practical value and promotion prospects. Attached Figure Description

[0007] Figure 1: Schematic diagram of the structure and control circuit of the aroma diffuser of the present invention; Figure 2: Schematic diagram of USB power supply, lithium battery charging, power supply status detection and MCU connection; Figure 3: Flowchart of the timer control method of the aroma diffuser. Specific implementation methods

[0008] like Figure 1 As shown, the aroma diffuser of the present invention includes a housing 1, an atomizing component 2, a power management module 3, a lithium battery 4, a USB charging management chip 5, a microcontroller (MCU) 6, and a user input device 7. The USB charging management chip 5 can detect whether power is being supplied through a USB interface and whether the lithium battery is being charged, and outputs a detection signal to the input pin of the MCU 6. The power management module 3 implements the switching between USB and lithium battery power supply. The MCU 6 determines the current power supply status based on this signal and automatically switches the enabled or disabled timed shutdown function accordingly. When USB power supply is detected and the lithium battery is being charged, the MCU 6 controls the atomizing component 2 to continue working and disables the timed shutdown function; when USB is not connected and only the lithium battery is powered, the MCU 6 controls the operation and shutdown of the atomizing component 2 according to the user-set timer.

[0009] like Figure 2 As shown, the USB interface is connected to the USB charging management chip 5, which is connected to the power management module 3 and the lithium battery 4 to realize charging management and power supply switching. The status output terminal of the USB charging management chip 5 is connected to the GPIO input terminal of the MCU6. The MCU6 periodically reads this signal as the basis for switching timing control.

[0010] like Figure 3As shown, the control method includes: after startup, MCU6 detects the USB power supply status. If it is powered by USB and the lithium battery is charging, the timed shutdown function is canceled and the atomizing component 2 is continuously driven; if it is powered only by the lithium battery, the timed shutdown function is restored, and the atomizing component 2 is turned off after the timer expires. The user can set the on / off state of the timed shutdown function and the timer duration through the user input device 7.

Claims

1. A control circuit for an aroma diffuser, characterized in that, include: ● Outer casing; ● Atomizing components; ● Power management module, used to switch between USB power supply and lithium battery power supply, and to charge the lithium battery and power the atomization components and control circuit; ● Lithium battery for powering the aroma diffuser when the USB port is not connected; ● USB charging management chip, which is used to detect the USB power supply status and charge the lithium battery, and output a USB power supply status signal; ● Microcontroller (MCU): The MCU is used to receive the USB power supply status signal from the USB charging management chip, determine the current power supply mode based on the signal, and control the activation or deactivation of the timed shutdown function accordingly, while controlling the start and stop of the atomizing component. ● User input device, used by the user to set the on / off switch and timer for the timed shutdown function.

2. The aroma diffuser control circuit according to claim 1, characterized in that, The user input device is a button or an external signal input device.

3. A method for controlling the timing of an aroma diffuser, characterized in that, Includes the following steps: ● S1: The MCU monitors the USB power supply status signal of the USB charging management chip in real time; ● S2: If a USB connection is detected and the lithium battery is being charged, the MCU will automatically cancel the timed shutdown function and control the atomizing component to continue working; ● S3: If the USB is not connected and only the lithium battery is powered, the MCU will resume the timed shutdown function and shut down the atomizing component according to the time set by the user. ● S4: The user can set the timer off function and the timer duration by pressing a button or using an external signal.

4. The method according to claim 3, characterized in that, The timed shutdown function includes a switch for the timed shutdown function and the setting of the timer duration.

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