Impedance identification method for ultrasonic atomizer, and ultrasonic atomizer
AssigneeShenzhen First Union Technology Co., Ltd.
InventorsXinjun LI, Zhongli XU, Yonghai LI
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Abstract
An impedance identification method for an ultrasonic atomizer (100), and an ultrasonic atomizer (100). The impedance identification method is used for identifying the impedance of an ultrasonic atomization sheet (12) in an ultrasonic atomizer (100). The method comprises: acquiring a first current, wherein the first current is a current which is output from a power source (14) in an ultrasonic atomizer (100) when an ultrasonic atomization sheet (12) operates at a resonant frequency; and according to preset correspondences between currents and impedance intervals, determining an impedance interval corresponding to the first current.
Claims21
An impedance identification method for an ultrasonic atomizer, wherein the impedance identification method is used for identifying an impedance of an ultrasonic atomization sheet in the ultrasonic atomizer and comprises:
- acquiring a first current, wherein the first current is a current output from a power supply in the ultrasonic atomizer when the ultrasonic atomization sheet operates at a resonance frequency;
- and
- determining, according to the first current and a correspondence between a preset current and a preset impedance interval, an impedance interval corresponding to the first current.
An ultrasonic atomizer, comprising:
- a liquid storage cavity for storing a liquid substrate;
- an ultrasonic atomization sheet in communication with the liquid storage cavity, the ultrasonic atomization sheet being configured to generate oscillation to atomize the liquid substrate;
- a control circuit and a power supply,
- wherein the control circuit comprises:
- a controller and a driving branch, wherein the driving branch is connected to the power supply and the controller, respectively, the driving branch is configured to generate a driving voltage in response to a first pulse signal, and the driving voltage is configured to drive the ultrasonic atomization sheet;
- N first switch branches and N impedance branches, wherein the driving branch passes through one of the first switch branches and one of the impedance branches in sequence and is then connected to the ultrasonic atomization sheet, the first switch branches are further connected to the controller, and N is an integer ≥2;
- and
- the controller is configured to output the first pulse signal, control a target first switch branch in the N first switch branches to be turned on, and control the other first switch branches to be turned off, so that a combined impedance of a first impedance branch and the ultrasonic atomization sheet matches an impedance of the driving branch, wherein the first impedance branch is connected to the first switch branch that is turned on.
(canceled)
Dependencies are inferred from the claim text.