Ultrasonic atomizer

Patent metadata

Field	Value
Publication number	US-2025098741-A1
Application number	US-202318832588-A
Country	US
Kind code	A1
Filing date	Jan 10, 2023
Priority date	Jan 26, 2022
Publication date	Mar 27, 2025
Grant date	—

Abstract

An ultrasonic atomizer is provided. The ultrasonic atomizer includes a liquid storage cavity for storing a liquid substrate an ultrasonic atomization sheet for generating oscillation to atomize the liquid substrate. The ultrasonic atomizer further includes a controller, a control circuit, and a power supply. The control circuit includes a power supply branch, a switching branch, a resonance branch, and an impedance branch. The resonance branch is used for resonating in response to on or off of the switching branch, to output a driving voltage based on a pulse voltage. The impedance branch is used for enabling impedance of a combination of the impedance branch and the ultrasonic atomization sheet to match impedance of a combination of the power supply branch, the switching branch, and the resonance branch.

First claim

1 . An ultrasonic atomizer comprising:
a liquid storage cavity for storing a liquid substrate; an ultrasonic atomization sheet for generating oscillation to atomize the liquid substrate; and a controller, a control circuit, and a power supply, wherein the control circuit comprises: a power supply branch, connected to the power supply and configure to generate a direct current power supply based on the power supply; a switching branch, connected to the controller and the power supply branch separately, and configured to be on or off in response to a first pulse signal outputted by the controller, to generate a pulse voltage based on the direct current power supply; a resonance branch, connected to the power supply branch and the switching branch separately, and configured to resonate in response to on or off of the switching branch, to output, based on the pulse voltage, a driving voltage for driving the ultrasonic atomization sheet; and an impedance branch, connected between the resonance branch and the ultrasonic atomization sheet, and configured to enable impedance of a combination of the impedance branch and the ultrasonic atomization sheet to match impedance of a combination of the power supply branch, the switching branch, and the resonance branch.

2 . The ultrasonic atomizer according to claim 1 , wherein:
the power supply branch comprises a first inductor; and a first end of the first inductor is connected to the power supply, and a second end of the first inductor is connected to the switching branch and the resonance branch separately.

3 . The ultrasonic atomizer according to claim 1 , wherein:
the switching branch comprises a switching transistor; and a first end of the switching transistor is connected to the controller, a second end of the switching transistor is connected to the ground, and a third end of the switching transistor is connected to the power supply branch and the resonance branch separately.

4 . The ultrasonic atomizer according to claim 3 , wherein:
the switching branch further comprises a first capacitor, a first end of the first capacitor is connected to the third end of the switching transistor, and a second end of the first capacitor is connected to the ground; the first capacitor is configured to charge when the switching transistor is off and a current flowing through the resonance branch is less than a first current threshold, and the first capacitor is used for resonating with the resonance branch to discharge when the switching transistor is off and the current flowing through the resonance branch is greater than or equal to the first current threshold; and when the first capacitor is discharged to a second current threshold, the switching transistor is on.

5 . The ultrasonic atomizer according to claim 4 , wherein:
when the switching transistor is off, a frequency of a combination of the first capacitor and the resonance branch when resonating is lower than a frequency of the ultrasonic atomization sheet; and when the switching transistor is on, a frequency of the resonance branch when resonating is higher than the frequency of the ultrasonic atomization sheet.

6 . The ultrasonic atomizer according to claim 5 , wherein:
the frequency of the ultrasonic atomization sheet is any frequency between [2.9 MHZ-3.1 MHZ]; when the switching transistor is off, the frequency of the combination of the first capacitor and the resonance branch when resonating is any frequency between [2 MHZ-3 MHZ]; and when the switching transistor is on, the frequency of the resonance branch when resonating is any frequency between [3.2 MHZ-4 MHZ].

7 . The ultrasonic atomizer according to claim 3 , wherein:
the switching branch further comprises a first resistor and a second resistor connected in series; and a first end of a circuit formed by the first resistor and the second resistor connected in series is connected to the controller, a second end of the circuit formed by the first resistor and the second resistor connected in series is connected to the ground, and a connection point between the first resistor and the second resistor is connected to the first end of the switching transistor.

8 . The ultrasonic atomizer according to claim 1 , wherein:
the resonance branch comprises a second capacitor and a second inductor; and a first end of the second capacitor is connected to the power supply branch and the switching branch separately, a second end of the second capacitor is connected to a first end of the second inductor, and a second end of the second inductor is connected to the impedance branch.

9 . The ultrasonic atomizer according to claim 1 , wherein:
the resonance branch comprises a sixth capacitor and a primary-side winding of a transformer; and a first end of the sixth capacitor is connected to the power supply branch and the switching branch separately, a second end of the sixth capacitor is connected to a first end of the primary-side winding, and a second end of the primary-side winding is connected to the ground.

10 . The ultrasonic atomizer according to claim 9 , wherein:
the impedance branch comprises a sixth inductor and a secondary-side winding of the transformer; and a first end of the sixth inductor is connected to a first end of the secondary-side winding of the transformer, a second end of the sixth inductor is connected to the ultrasonic atomization sheet, and a second end of the secondary-side winding of the transformer is connected to the ground.

11 . The ultrasonic atomizer according to claim 1 , wherein:
the impedance branch comprises a third capacitor; and a first end of the third capacitor is connected to the resonance branch and the ultrasonic atomization sheet separately, and a second end of the third capacitor is connected to the ground.

12 . The ultrasonic atomizer according to claim 11 , wherein:
the impedance branch further comprises a third inductor; and a first end of the third inductor is connected to the first end of the third capacitor and the resonance branch separately, and a second end of the third inductor is connected to the ultrasonic atomization sheet, or the first end of the third inductor is connected to the resonance branch, and the second end of the third inductor is connected to the first end of the third capacitor and the ultrasonic atomization sheet separately.

13 . The ultrasonic atomizer according to claim 1 , wherein:
the impedance of the combination of the impedance branch and the ultrasonic atomization sheet comprises an impedance real part and an impedance imaginary part; and when the impedance real part is equal to the impedance of the combination of the power supply branch, the switching branch, and the resonance branch, and the impedance imaginary part is zero, the impedance of the combination of the impedance branch and the ultrasonic atomization sheet matches the impedance of the combination of the power supply branch, the switching branch, and the resonance branch.

14 . The ultrasonic atomizer according to claim 1 , wherein:
the control circuit further comprises a driving branch; the switching branch is connected to the controller through the driving branch, and the driving branch is connected to the power supply; and the driving branch is used for receiving the first pulse signal, and outputting a second pulse signal to the switching branch based on the first pulse signal and the power supply, wherein a driving capability of the second pulse signal is stronger than that of the first pulse signal.

15 . The ultrasonic atomizer according to claim 14 , wherein:
the driving b

Assignees

• Shenzhen First Union Tech Co

Inventors

• Li Xinjun
• Xu Zhongli
• Li Yonghai

Classifications

• H02J7/855

  with circuits adapted for supplying loads from the battery · CPC title

• H03K17/0822

  in field-effect transistor switches · CPC title

• A61M11/005

  using ultrasonics (spraying or atomising liquids using ultrasonic vibrations in general B05B17/06) · CPC title

• A24F40/50

  Control or monitoring · CPC title

• A24F40/42

  Cartridges or containers for inhalable precursors · CPC title