Electronic cigarette capable of temperature control and temperature control method therefor

A method for controlling the temperature of an electronic cigarette, comprising the following steps:

• S1:
• turning a smoking switch SW off and disconnecting a circuit control board from a power supply when the electronic cigarette is not in service;
• S2:
• turning on the smoking switch SW when the user begins to smoke, sending a control signal via the end HOT according to a signal at an end KEY1 by a chip U1, connecting a heating coil R to the power supply via a metal oxide semi-conductor field effect transistor M1, starting to read electronic signals about temperature at an end FB by the chip U1;
• S3:
• atomizing the e-liquid by the heating coil R when there is e-liquid in an atomizing assembly, during the process, the temperature of the heating coil R is stable and its resistance generally remains constant, the electronic signal about temperature at the end FB detected by the chip U1 stays constant, and the control signal sent via the end HOT by the chip U1 stays constant, and keeping providing vapor to the user;
• S4:
• controlling the metal oxide semi-conductor field effect transistor M1 by the chip U1 via the end HOT to disconnect the heating coil R from the power supply and stopping providing vapor to the user when the e-liquid in the atomizing assembly is used up or in shortage, the surface of the heating coil R dry burns, the temperature thereof goes up fiercely, the resistance of the heating coil R rises rapidly because the heating coil R is made from thermo-sensitive material with a positive temperature coefficient and a change of the electronic signal about temperature at the end FB is detected by the chip U1, and then temperature of the heating coil R starts to go down;
• S5:
• cutting off the power supply immediately even if the smoking switch SW is turned on again by the user and the power supply is restored provisionally before the temperature of the heating coil R goes down to a preset threshold temperature 210° C. and e-liquid is supplemented to the atomizing assembly, as the electronic signal about temperature at the end FB detected by the chip U1 still is abnormal;
• S6:
• supplying power to the heating coil R to atomizes the e-liquid normally till the temperature of the heating coil R goes down below the preset threshold temperature 210° C., the e-liquid is supplemented to the atomizing assembly, the heating coil R returns its normal resistance and the user proceeds to smoke, and continuing supplying power to the heating coil R if the chip U1 detects the electronic signal about temperature at the end FB is normal.

A method for controlling the temperature of an electronic cigarette, characterized in that comprising the following steps:

• S1:
• turning a smoking switch SW off and disconnecting a circuit control board from a power supply when the electronic cigarette is not in service;
• S2:
• turning on the smoking switch SW when the user begins to smoke, sending a control signal via the end HOT according to a signal at an end KEY1 by a chip U1, connecting a heating coil R to the power supply via a metal oxide semi-conductor field effect transistor M1, starting to read electronic signals about temperature at an end FB by the chip U1;
• S3:
• atomizing the e-liquid by the heating coil R when there is e-liquid in an atomizing assembly, during the process, the temperature of the heating coil R is stable and its resistance generally remains constant, a rate of temperature change at the end FB detected by the chip U1 is lower than a preset rate of temperature change, and the control signal sent via the end HOT by the chip U1 stays constant, and keeping providing vapor to the user;
• S4:
• controlling the metal oxide semi-conductor field effect transistor M1 by the chip U1 via the end HOT to disconnect the heating coil R from the power supply and stopping providing vapor to the user when the e-liquid in the atomizing assembly is used up or in shortage, the surface of the heating coil R dry burns, the temperature thereof goes up fiercely, the resistance of the heating coil R rises rapidly because the heating coil R is made from thermo-sensitive material with a positive temperature coefficient and the rate of temperature change at the end FB detected by the chip U1 exceeds the preset rate of temperature change, and then temperature of the heating coil R starts to go down;
• S5:
• cutting off the power supply immediately even if the smoking switch SW is turned on again by the user and the power supply is restored provisionally before the rate of temperature change of the heating coil R goes down to the preset rate of temperature change and e-liquid is supplemented to the atomizing assembly, as the rate of temperature change at the end FB detected by the chip U1 still exceeds the preset rate of temperature change;
• S6:
• supplying power to the heating coil R to atomizes the e-liquid normally till the rate of temperature change of the heating coil R goes down below the preset rate of temperature change, the e-liquid is supplemented to the atomizing assembly, the heating coil R returns its normal resistance and the user proceeds to smoke, and continuing supplying power to the heating coil R if the chip U1 detects the rate of temperature change at the end FB is normal.