Method and device for heating control of an electronic cigarette

Patent metadata

Field	Value
Publication number	US-9603386-B2
Application number	US-201313870797-A
Country	US
Kind code	B2
Filing date	Apr 25, 2013
Priority date	Mar 5, 2013
Publication date	Mar 28, 2017
Grant date	Mar 28, 2017

Abstract

A method and device for heating control of an electronic cigarette are provided, wherein, the method includes steps as below: S 1 . sensing whether there is a smoke signal via a sensor or a switch, if yes, executing step S 2 ; S 2 . activating a timer to record time and turn on a semiconductor switch so as to heat the heating element in a full output power mode; S 3 . heating the heating element in a constant power mode when the recording time of the timer arrives at a first preset time T0. When implementing the present invention, the adoption of the two heating methods for heating element makes an optimized atomization effect and an excellent taste of smoking possible, which is not affected by the changeable voltage of the battery.

First claim

The invention claimed is:

1. A method for heating control of an electronic cigarette, used to a device for heating control of an electronic cigarette, the device comprising a heating element, a power battery, a semiconductor switch, a smoke signal detecting module, a setting module, and a microcontroller connected with the setting module, the power battery, the smoke signal detecting module and a control end of the semiconductor switch, wherein the microcontroller comprises a timer, a sampling unit, a calculating unit, a control unit and a resetting unit;
wherein the method comprising steps as follows:
S 0 . setting a first preset time T0 and a preset constant power by the setting module;
S 1 . detecting whether there is a smoke signal from a sensor or a switch, if yes, executing step S 2 ;
S 2 . activating the timer to record time and turning on the semiconductor switch so as to heat the heating element in a full output power mode;
S 3 . heating the heating element in a constant power mode when the recording time of the timer arrives at the first preset time T0, a count value of the timer will be reset when the microcontroller turns on the semiconductor switch to heat the heating element with a constant power;
wherein the step S 3 further comprises:
S 31 . sampling voltage of a power battery by the sampling unit;
S 32 . calculating a duty ratio of a pulse width modulation signal in accordance with the voltage of the power battery and the preset constant power by the calculating unit, the preset constant power P=U 2 /R*K, U is battery voltage, R is resistor of the heating element, K is value of coefficient;
S 33 . controlling breakover of the semiconductor switch based on the calculated pulse width modulation signal, and implementing heating control of the heating element in the constant power mode by the control unit;
wherein it further comprises the following step after the step S 3 :
S 4 . resetting the count value of the timer by the resetting unit;
wherein the semiconductor switch is one of a triode, a field-effect transistor and an insulated gate bipolar transistor, one end of the semiconductor switch is directly connected to the microcontroller, other end of the semiconductor switch is directly connected to the heating element.

2. A device for heating control of an electronic cigarette, comprising
a heating element,
a power battery used for powering the electronic cigarette,
a semiconductor switch used for controlling the power battery to heat the heating element or not,
a smoke signal detecting module used for detecting whether there is a smoke signal,
a setting module used for setting a first preset time T0 and a preset constant power, and
a microcontroller connected with the setting module, the power battery, the smoke signal detecting module and a control end of the semiconductor switch simultaneously;
wherein the microcontroller comprises a timer, the microcontroller will give orders to turn on the semiconductor switch and activate the timer to record time when a smoke signal has been detected by the smoke signal detecting module, the heating element is heated in a full power output mode; the heating element is heated in a constant power control mode when a count value of the timer arrives at the first preset time T0; the count value of the timer will be reset when the microcontroller turns on the semiconductor switch to heat the heating element with a constant power;
wherein the microcontroller further comprises:
a sampling unit, which is used for sampling voltage of the power battery;
a calculating unit, which is connected to the sampling unit and used for calculating a duty ratio of a pulse width modulation signal according to the voltage of the power battery and the preset constant power, the preset constant power P=U 2 /R*K, U is battery voltage, R is resistor of the heating element, K is value of coefficient;
a control unit, which is connected to the calculating unit and used for controlling breakover of the semiconductor switch based on the calculated pulse width modulation signal, and implementing heating control of the heating element;
wherein the microcontroller further comprises:
a resetting unit, which is connected to the timer and used for resetting the count value of the timer; and
wherein the semiconductor switch is one of a triode, a field-effect transistor and an insulated gate bipolar transistor, one end of the semiconductor switch is directly connected to the microcontroller, other end of the semiconductor switch is directly connected to the heating element.

Assignees

• Xiang Zhiyong
• Huizhou Kimree Technology Co Ltd Shenzhen Branch

Inventors

• Xiang Zhiyong

Classifications

• A24F47/008 Primary

  Human Necessities · mapped topic

• A24F40/50 Primary

  Control or monitoring · CPC title

• A24F40/10

  Devices using liquid inhalable precursors · CPC title