Patent ID: 7806649
Filing Date: 2010-10-05
Classification: F04D

Abstract:
1. A blower to be driven by a motor to feed a gas, comprising: a vane wheel including a pair of grooves extending circularly to surround a rotational axis of the vane wheel and opening in respective axial directions opposite to each other, and blades extending in a radial direction of the vane wheel in each of the grooves to partition the each of the grooves in a circumferential direction of the vane wheel, and a casing on which the vane wheel is supported in a rotatable manner and which includes a pair of stationary flow paths opening in the axial directions respectively and extending in the circumferential direction to face to the grooves respectively so that the gas urged in the grooves is capable of flowing in the circumferential direction in the stationary flow paths, a guide flow path extending in the axial directions to fluidly communicate with both of the stationary flow paths to enable the gas to flow from one of the stationary flow paths to the other one of the stationary flow paths so that the gas urged by one of the grooves is enabled to be further urged by the other one of the grooves, an inlet port for introducing the gas into the one of the stationary flow paths facing to the one of the grooves and an outlet port for discharging the gas out of the other one of the stationary flow paths facing to the other one of the grooves, wherein the blower comprises another vane wheel juxtaposed to the vane wheel in the axial directions, the another vane wheel includes a pair of grooves extending circularly to surround a rotational axis of the another vane wheel coaxial with the rotational axis of the vane wheel and opening in respective axial directions opposite to each other, and blades extending in a radial direction of the another vane wheel in each of the grooves to partition the each of the grooves in a circumferential direction of the another vane wheel, the casing has another pair of stationary flow paths opening in the axial directions respectively and extending in the circumferential direction to face to the grooves of the another vane wheel respectively so that the gas urged in the grooves of the another vane wheel is capable of flowing in the circumferential direction in the stationary flow paths of the another pair, and another guide flow path fluidly communicating with both of the stationary flow paths of the another pair to enable the gas to flow from one of the stationary flow paths of the another pair facing to one of the grooves of the another vane wheel to the other one of the stationary flow paths of the another pair facing to the other one of the grooves of the another vane wheel so that the gas urged in the one of the grooves of the another vane wheel is enabled to be further urged in the other one of the grooves of the another vane wheel, the inlet port allows the gas to be introduced into the one of the stationary flow paths for the vane wheel, the other one of the stationary flow paths for the vane wheel is fluidly connected to the one of the stationary flow paths of the another pair so that the gas urged in the vane wheel is enabled to be further urged in the another vane wheel, and the outlet port allows the gas to be discharged out of the other one of the stationary flow paths of the another pair through the other one of the stationary flow paths for the vane wheel.