원래 이름 기록: Nanjing Chervon Industry Co., Ltd.

A blower includes: a blower tube for an airflow to pass through; a fan assembly including fan blades, where the fan blades are rotatable about the fan axis of the fan assembly; a motor configured to drive the fan assembly to rotate; and a battery pack capable of powering the blower. The blower further includes an illumination device, the illumination device includes light-emitting portions, and the total lumen of all the light-emitting portions of the illumination device is greater than or equal to 280 lm.

A power tool system includes a first device and a second device, where the first device is different from the second device, and the first device is configured to download, from a remote device through a first communication module, an upgrade package applicable to the second device, store the upgrade package into a memory, and transmit the upgrade package to the second device through a second communication module.

A power tool system includes a power tool having a motor, a battery pack, and an adapter. The battery pack is capable of outputting a voltage different from the rated voltage of the power tool to start the power tool. The adapter includes a first port connected to the battery pack and used for accessing a first voltage outputted by the battery pack; a second port connected to the power tool and used for outputting a second voltage; and a voltage conversion unit for converting the first voltage into the second voltage. The voltage conversion unit includes a switch unit connected between the first port and the second port; a capacitor connected in parallel to the second port; and a control unit configured to set the switching frequency or the switching duty cycle of the switch unit based on the parameter related to the current of the motor.