A neck fan includes an arc-shaped shell and a fan assembly. The arc-shaped shell is configured to be worn around a neck of a user. The shell has a first side and a second side opposite to the first side. Each of the first side and the second side defines air inlets. At least one of the first side and the second side defines air outlets. The shell further defines a receiving space, and the receiving space includes an air duct communicating with the air inlets and outlets. The fan assembly is received in the receiving space and configured to drive the air to flow from the air inlets of both sides, through the air duct, reaching the air outlets.
1 . A neck fan, configured to be worn around a neck of a user, comprising:
an outer shell, configured to hang around the neck and defining an accommodating space inside the outer shell;
a centrifugal fan, received in the accommodating space; the centrifugal fan comprising:
a plurality of blades, wherein the plurality of blades are configured to rotate to intake air from an outside of the centrifugal fan to generate wind; and
a vortex tongue structure, arranged in the accommodating space and comprising a pressurizing plate and a wind guiding plate connected to the pressurizing plate, wherein the pressurizing plate is a curved wall arranged around ends of some of the plurality of blades, the wind guiding plate protrudes from and is extending away from an outer surface of the pressurizing plate;
wherein the wind guiding plate defines a wind guiding channel along which the wind is flowing; and a cavity is defined between an outer surface of the vortex tongue structure and an inner wall of the outer shell to isolate noise generated by the centrifugal fan from the user.
2 . The neck fan according to claim 1 , wherein the centrifugal fan further comprises two side walls, wherein,
the two side walls are opposite to each other and are connected to two opposite edges of the curved wall;
the curved wall surrounds and covers ends of the some of the plurality of blades away from a motor;
the curved wall and the two side walls cooperatively define a receiving space, the plurality of blades are received in the receiving space, each of the two side walls defines an air inlet window, the plurality of blades are configured to rotate to intake the air from the air inlet window of each of the two side walls.
3 . The neck fan according to claim 2 , wherein the centrifugal fan further comprises: a first wind guiding sub-plate, a second wind guiding sub-plate opposite to the first wind guiding sub-plate, and a third wind guiding sub-plate connected between the first wind guiding sub-plate and the second wind guiding sub-plate, wherein the third wind guiding sub- plate is opposite to the wind guiding plate;
the first wind guiding sub-plate, the second wind guiding sub-plate, the third wind guiding sub-plate, and the wind guiding plate cooperatively define an air channel communicating with the receiving space; and
the plurality of blades are configured to generate the wind from the air intaken from the air inlet window, the pressurizing plate is configured to guide the wind to flow to the air channel from a rest of the plurality of blades uncovered by the pressurizing plate.
4 . The neck fan according to claim 3 , wherein a direction to which an opening of the air channel faces is perpendicular to a direction along which the air is intaken into the receiving space through the air inlet windows.
5 . The neck fan according to claim 4 , wherein ends of the rest of the plurality of blades away from the motor are exposed from the opening of the air channel.
6 . The neck fan according to claim 3 , wherein,
the wind guiding plate is connected to an end of the curved wall of the pressurizing plate and extending away from the two side walls; the third wind guiding sub-plate is connected to an other end of the curved wall and extending parallel to the wind guiding plate; the first wind guiding sub-plate is connected to one of the two side walls of the pressurizing plate; and the second wind guiding sub-plate is connected to an other one of the two side walls of the pressurizing plate; and
the wind guiding plate is extending inclined relative to an end portion of the curved wall near the wind guiding plate.
7 . The neck fan according to claim 6 , wherein, the curved wall surrounds the ends of the some of the plurality of blades away from the motor, the two side walls cover two sides of each of all of the plurality of blades, and the two sides refer to sides disposed near the air inlet windows.
8 . The neck fan according to claim 6 , wherein, the third wind guiding sub-plate is extending from an other end portion of the curved wall disposed near the second wind guiding sub-plate, the third wind guiding sub-plate and the other end portion are extending on a same plane.
9 . A neck fan, configured to be worn around a neck of a user, the neck fan comprising:
an inner shell, disposed near the neck and defining a plurality of air outlets;
an outer shell, connected to the inner shell and disposed opposite to the inner shell and away from the neck, wherein the outer shell and the inner shell cooperatively define a receiving channel;
two centrifugal fans, wherein one of the two centrifugal fans is disposed at an end of the receiving channel, and an other one of the two centrifugal fans is disposed at an other end of the receiving channel, wherein the receiving channel is communicating with the plurality of air outlets;
a partition, received in the receiving channel and dividing the receiving channel into a first channel and a second channel, wherein the second channel is configured to receive electric components of the neck fan;
wherein each of the two centrifugal fans is configured to generate wind and drive the wind to flow into both the first channel and the second channel, and/or a portion of the inner shell that contacts the neck of the user extending upwardly to form a curved surface, the curved surface may be inclined at a certain angle relative to the portion that contacts the neck of the user, and the plurality of air outlets are defined in the curved surface, such that the plurality of air outlets are oriented towards an inner side of a tubular body portion; and
each of the two centrifugal fans comprises:
a plurality of blades, wherein the plurality of blades are configured to rotate to intake air from an outside of the centrifugal fan to generate the wind; and
a vortex tongue structure, comprising a pressurizing plate and a wind guiding plate connected to the pressurizing plate, wherein the pressurizing plate is a curved wall arranged around ends of some of the plurality of blades, the wind guiding plate protrudes from and is extending away from an outer surface of the pressurizing plate.
10 . The neck fan according to claim 9 , wherein each of the two centrifugal fans further comprises:
a motor, wherein the plurality of blades are configured to be driven by the motor to rotate to generate the wind.
11 . The neck fan according to claim 10 , wherein the wind guiding plate defines an air channel communicating with the first channel and the second channel and is configured to guide the wind to flow from the vortex tongue structure to the first channel and the second channel.
12 . The neck fan according to claim 11 , wherein the wind guiding plate is spaced apart from the partition.
13 . The neck fan according to claim 10 , wherein each of the two centrifugal fans comprises two side walls, the two side walls are opposite to each other and are connected to two opposite edges of the curved wall;
the curved wall surrounds and covers ends of the some of the plurality of blades away from the motor;
the curved wall and the two side walls cooperatively define a receiving space, the plurality of blades are received in the receiving space, each of the two side walls defines an air inlet window, the plurality of blades are configured to rotate to intake air from the air inlet window of each of the two side walls.
14 . The neck fan according to claim 13 , wherein each of the two centrifugal fans comprises a first wind guiding sub-plate, a second wind guiding sub-plate opposite to the first wind guiding sub-plate, a third wind guiding sub-plate connected between the first wind guiding sub-plate and the second wind guiding sub-plate, and a fourth wind guiding sub-plate connected between the first wind guiding sub-plate and the second wind guiding sub-plate and opposite to the third wind guiding sub-plate;
the first wind guiding sub-plate, the second wind guiding sub-plate, the third wind guiding sub-plate, and the fourth wind guiding sub-plate cooperatively define an air channel communicating with the receiving space; and
the plurality of blades are configured to generate the wind from the air intaken from the air inlet window, the pressurizing plate is configured to guide the wind to flow to the air channel from a rest of the plurality of blades uncovered by the pressurizing plate.
15 . The neck fan according to claim 14 , wherein, each of the inner shell and the outer shell defines a plurality of air inlets;
the air inlet window, which is in one of the two side walls disposed near the inner shell, corresponds to and communicate with the plurality of air inlets in the inner shell;
the air inlet window, which is in an other one of the two side walls disposed near the outer shell, corresponds to and communicate with the plurality of air inlets in the outer shell.
16 . The neck fan according to claim 15 , wherein a first direction in which the air is flowing from the outside of the neck fan into the two centrifugal fans through the plurality of air inlets is parallel to a second direction in which the plurality of blades intake the air from the outside of the centrifugal fan through the air inlet windows; and
a third direction to which an opening of the air channel faces is perpendicular to the first direction and the second direction.
17 . The neck fan according to claim 9 , wherein a cross-sectional area of an air duct is decreased along a direction away from a location where each of the two centrifugal fans is disposed.
18 . A neck fan, comprising:
an outer shell, configured to hang around a user neck and defining a receiving space;
a vortex tongue assembly, received in the receiving space and comprising a vortex tongue shell and a centrifugal fan disposed inside the vortex tongue shell;
wherein a cavity is formed between an outer surface of the vortex tongue shell and an inner wall of the outer shell and is configured to absorb noise generated by rotation of the centrifugal fan.
19 . The neck fan according to claim 18 , wherein, the cavity comprises a first sub-cavity and a second sub-cavity; the outer surface of the vortex tongue shell comprises a first sub-surface facing towards a free end of the outer shell and a second sub- surface facing away from the free end of the outer shell;
the first sub-cavity is formed between the first sub-surface and a portion of the inner wall of the outer shell at the free end of the outer shell;
the second sub-cavity is formed between the second sub-surface and a rest portion of the inner wall of the outer shell away from the free end of the outer shell.