Abstract: A one cycle control method for power factor correction based on a boost circuit and a main control chip of system comprises the steps of: (1) Determining whether soft-start ends or not; if the soft-start ends, processing step (2) directly, if not, increasing reference value Uref of output voltage and then processing step (2); (2) Reading sampling output voltage Uo, and sampling inductive current ig according to A/D sampling triggering instant; (3) Calculating duty ratio of PWM signal for driving the switch transistor; (4) Outputting PWM signal; (5) Calculating the next A/D sampling triggering instant according to the duty ratio of PWM signal; (6) Returning to step (2).

Abstract: An air conditioner with operation according to a user-defined curve and the control method thereof are disclosed. The air conditioner includes a main unit, the main unit includes: a receiving unit of user-defined curve for receiving the user-defined curve set by a user, the user-defined curve is used to define the coincidence relation between the needed air conditioning temperature and the time, and a control unit connected to the receiving unit of user-defined curve for controlling the air conditioning temperature of the air conditioner at different time according to the user-defined curve. The user-defined curve can be set by a keyboard of a remote controller by the user, the data of the user-defined curve can be stored in a memory chip and then can be sent into an infrared signal receiving unit of the main unit, a MCU control chip controls the operation of the air conditioner according to the user-defined curve.

Abstract: A one cycle control method for power factor correction based on a boost circuit and a main control chip of system comprises the steps of: (1) Determining whether soft-start ends or not; if the soft-start ends, processing step (2) directly, if not, increasing reference value Uref of output voltage and then processing step (2); (2) Reading sampling output voltage Uo, and sampling inductive current ig according to A/D sampling triggering instant; (3) Calculating duty ratio of PWM signal for driving the switch transistor; (4) Outputting PWM signal; (5) Calculating the next A/D sampling triggering instant according to the duty ratio of PWM signal; (6) Returning to step (2).

Abstract: An air conditioner with operation according to a user-defined curve and the control method thereof are disclosed. The air conditioner includes a main unit, the main unit includes: a receiving unit of user-defined curve for receiving the user-defined curve set by a user, the user-defined curve is used to define the coincidence relation between the needed air conditioning temperature and the time, and a control unit connected to the receiving unit of user-defined curve for controlling the air conditioning temperature of the air conditioner at different time according to the user-defined curve. The user-defined curve can be set by a keyboard of a remote controller by the user, the data of the user-defined curve can be stored in a memory chip and then can be sent into an infrared signal receiving unit of the main unit, a MCU control chip controls the operation of the air conditioner according to the user-defined curve.