Johnson Electric International Ag

Johnson Electric S.a.

Chuanjiang Guo

Chuanhui Fang

Feng Xue

Feng Liu

Liang Guan

Hongguang Li

Serge Pesetsky

Guilin Li

Shaopeng Mo

Chikuen Au

Mingju Chen

An impeller includes a base plate, a hub protruding from the base plate, and a number of blades connected to the base plate and extending from a lateral surface of the hub toward an edge of the base plate. Opposite sides of each of the blades are a working surface and a non-working surface. The base plate is divided into a plurality of sub-plates by the plurality of blades. Each of the sub-plates is located between two adjacent blades and connected to the non-working surface of one of the two adjacent blades and the working surface of the other one of the two adjacent blades. A distance from an edge of each of the sub-plates to a center of rotation of the impeller is varied.

Impeller and water pump having the same

A muffling device applied to a ventilating fan having a scroll casing that has a bottom plate and a top plate includes a first annular muffling panel and a second annular muffling panel. The first muffling panel includes a first wall extending from an edge of the through hole in a direction away from the bottom plate and a second wall extending inward from a top end of the first wall and extending toward the bottom plate. The second muffling panel includes a third wall extending from the top plate in a direction away from the bottom plate and a fourth wall extending from a top end of the third wall. The first muffling panel, the second muffling panel, and the top plate corporately define a first noise reduction chamber. A distance from the second muffling panel to the first muffling panel is gradually increased in a radially outward direction.

Muffling device and ventilating fan having the same

A liquid pump () comprises an impeller () housed in an impeller chamber () having an axial inlet () and a plurality of centrifugal passages () communicating with a plurality of outlets () through a valve (). The rotation of the impeller () pumps the liquid into one of the centrifugal passages () and elastically deforms the valve () that controls through which outlet () the liquid is pumped out of the pump ().

Pump having selectable outlets

Growing community of inventors

Shenzhen, China

Chuanjiang Guo