A neck fan includes an arc-shaped shell configured to hang around user's neck and at least four fan assemblies arranged in the shell. The shell includes a first part and a second part. Each of the first part and the second part defines an accommodating space, air inlets and air outlets communicated with the accommodating space, at least one partition is arranged in the accommodating space and configured to divide the accommodating space into at least two accommodating parts arranged along an extension direction of the shell. Each of the fan assemblies is arranged in one of the at least two accommodating parts and is configured to direct air into the one of the at least two accommodating parts through corresponding air inlets and to direct air out of the one of the at least two accommodating parts through corresponding air outlets.

A portable blowing device configured for being worn around a neck of a human body, includes two arms each defining an airflow channel therein; and fans received in the arms respectively. The arm includes an inner side wall close to the neck and an outer side wall connected to the inner side wall. The arm includes an air inlet and an air outlet in communication with the airflow channel respectively. The air inlet is arranged at the inner side wall and/or the outer side wall. The fan is configured to generate an airflow passing through the air inlet, the airflow channel and the air outlet in sequence.

A fan unit for an air-conditioned garment, wherein the fan unit takes external air into an interspace between the garment and a wearer's body, the fan unit including: a fan that blows external air into the interior of the garment; a motor that rotates the fan; a battery that supplies power to the motor; a charging terminal for charging the battery; and a power switch to start and stop the fan unit, wherein the fan, the motor and the battery are housed in a casing, the casing has an air intake port that takes in external air, and an air blowing port that blows the taken-in external air into the interior of the garment, the charging terminal and the power switch are provided on the exterior of the casing, and the casing has a thickness of 5 to 30 mm in an axial direction of the fan.

A thermoelectric fan including: a heat collector; a thermoelectric generator (TEG) thermally coupled to the heat collector; a heat sink thermally coupled to the TEG and positioned to provide a temperature differential across the TEG; a motor in electrical communication with the TEG; a fan blade coupled to the motor and configured to generate a first airflow through the heat sink; and a heat sink shield configured to shield the heat sink from a second airflow, the second airflow having a higher temperature than the first airflow. The second airflow may be generated by the fan blade interacting with the first airflow. A heat sink shield for a thermoelectric fan wherein the heat sink shield is configured to attach to the thermoelectric fan and configured to at least partially shield the heat sink from a vorticity vector field and related air flows generated by the fan blade.

To stably provide power to a motor that drives a fan. This blower for an air-conditioned garment is provided with a blower unit having a fan driven by a motor/and a power supply unit for supplying power to the blower unit, and is characterized in that: the blower unit is provided with a first housing that houses the fan; the power supply unit is provided with a second housing that houses a battery; the first housing is provided with a first contact part through which the power supplied by the power supply unit can be supplied; the second housing is provided with a second contact part which is arranged in a position corresponding to the first contact part and abuts the first contact part; and the first housing and the second housing each have a shape detachably engageable with each other.

The present invention is directed to a portable fan for the use in firefighting and other ventilation use-cases. The portable fan provides firefighters the ability to provide positive pressure ventilation in use for fighting fires which does not require power cables or combustible fuel powered motors, and provides increased portability, reduced risk, and reduced deployment time associated with managing and fighting a fire.

In accordance with the inventive concepts, provided is a wearable device for personal thermal comfort. The device can take the form of a wearable fan comprising a U-shaped housing including a first arm having a central first axis and a second arm having a central second axis connected by an intermediate curved member. The device includes a first fan assembly disposed at a distal end of the first arm, comprising a fan, at least one air inlet, and least one air outlet directed off-axis from the first axis. The device can further include a second fan assembly disposed at a distal end of the second arm, comprising a fan, at least one air inlet, and least one air outlet directed off-axis from the second axis. The device can include a rear plate for cooling and/or heating. The device, in some embodiments, can be structured to be worn around a neck.

A backpack blower working machine includes: a back frame worn to be carried on a back of a worker; a volute case mounted on the back frame; a centrifugal fan equipped in the volute case; an electric motor assembled to the volute case and configured to rotate the centrifugal fan; and a battery attached to the back frame and configured to supply the electric motor with electricity. The back frame includes an upper section and a lower section. Shoulder belts for carrying and the volute case are provided on the upper section. A battery arrangement space for the battery is provided in the lower section, and has a length in an up-and-down direction and a length in a right and left direction each of which is longer than a length in a front-to-back direction.

A handheld blower including a housing, an air duct defining a duct axis, the air duct including an air inlet and an air outlet opposite the air inlet, and a handle. The handle at least partially defining a battery receiving cavity configured to receive at least a portion of a battery pack therein, where the handle defines a grip axis, and where the grip axis is parallel to the duct axis.

Provided are a mask device and a method for controlling the same. The mask device includes a mask body configured to cover a nose and mouth of a user, a first air cleaner connected to one side of the mask body, and a second air cleaner connected to the other side of the mask body. Also, the mask device includes a first suction fan module installed in the first air cleaner, a second suction fan module installed in the second air cleaner, and an exhaust fan module disposed in the mask body.