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US 2025/0052250 A1Published application
Portable fan, drive circuit, handheld fan, and neck fan
AssigneeShenzhen Jisu Technology Co., Ltd
InventorsGuanzheng ZHENG, Jiahang XIE, Shuiyong YUAN, Xiangfu LI, Haijun GAO, Cheng YE, Cunfu HUANG, Weijie ZHENG
Life of this patent
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Abstract
A portable fan includes: a fan and a power supply drive assembly electrically connected to the fan. The power supply drive assembly comprises a battery and a fan drive circuit electrically connected to the battery. The fan drive circuit includes a master control circuit; a three-phase drive circuit; and an inverted-phase electric potential detection circuit. The battery is configured to supply power to the fan drive circuit.
Claims20
A portable fan, comprising a fan and a power supply drive assembly electrically connected to the fan;
- wherein the power supply drive assembly comprises a battery and a fan drive circuit electrically connected to the battery;
- the fan drive circuit comprises:
- a master control circuit;
- a three-phase drive circuit, comprising at least three signal input ends and three drive signal output ends;
- wherein each of the at least three signal input ends is electrically connected to the master control circuit to receive control signals;
- each of the three drive signal output ends is electrically connect to a respective one of three signal ends of a direct-current (DC) brushless fan motor to respectively output a three-phase drive signal to drive the DC brushless fan motor to rotate;
- and
- an inverted-phase electric potential detection circuit, comprising three detection branches;
- wherein each of the three detection branches comprises a detection end and a detection output end electrically connected to the detection end;
- three detection ends of the three detection branches are respectively electrically connected to the three drive signal output ends;
- three detection output ends of the three detection branches are electrically connected to the master control circuit to respectively output a first detection signal, a second detection signal, and a third detection signal;
- the master control circuit is informed of a phase of the three-phase drive signal based on the first detection signal, the second detection signal, and the third detection signal to adjust the control signals;
- wherein the battery is configured to supply power to the fan drive circuit.
10 more elements
A fan, comprising:
- a neck housing, defining a neck space, wherein the neck housing is configured to be worn to a neck of a user, and the neck is configured to be received in the neck space;
- an airflow portion, arranged inside the neck housing and configured to blow an airflow towards the neck space;
- wherein the airflow portion comprises rotation air blades and a three-phase motor drive assembly driveably connected to the rotation air blades to drive the rotation air blades to rotate to generate the airflow.
A fan, comprising:
- an air duct portion, comprising a body portion, wherein the body portion defines an air guiding cavity therein;
- the air duct portion defines an air outlet and an air inlet respectively at opposite ends thereof;
- the air outlet and the air inlet are communicated to the air guiding cavity, and a positioning protruding post is arranged inside the body portion;
- an airflow portion, comprising rotation air blades and a drive portion that is driveably connected to the rotation air blades, wherein the rotation air blades are rotatably received in the air guiding cavity and are arranged facing towards the air outlet;
- the drive portion comprises a stator and a rotor sleeving an outside of the stator;
- the rotor is fixedly mounted on the rotation air blades and is coaxially arranged with the rotation air blades;
- the stator fixedly sleeves the positioning protruding post;
- the drive portion is a three-phase motor;
- a handheld portion, connected to the air duct portion, wherein the handheld portion defines a mounting cavity;
- a power supply assembly is received in the mounting cavity;
- and the power supply assembly is electrically connected to the three-phase motor.
8 more elements
Dependencies are inferred from the claim text.