VACUUM CLEANER (OPTION) Russian patent published in 2008 - IPC A47L9/00 A47L9/22 

FIELD: personal demand and household items.

SUBSTANCE: vacuum cleaner incorporates a body and a centre of air blast fan which produces suction force in the body and accommodates an air blast fan and an electric motor. The air blast fan is surrounded by the inner body of the vacuum cleaner. The inner body produces inside an internal passage of flow and includes the lower body, which supports the bottom of the air blast fan centre and has a semi-cylindrical form, its centre being set on the spinning axis of the air blast fan centre, and the upper body attached to the lower one and thus building the inner body. The upper body includes a cylindrical section, which has the same radius as the lower one, and a dilation, which goes from the cylindrical section and has the radius exceeding that of the cylindrical section. The inner body is surrounded by the outer body. Between the inner and outer body according to an outlet passage flow is arranged to provide communication with the internal flow. According to this version of the vacuum cleaner, the outlet passage flow has a recirculated line of flow going from the internal passage, which courses the circulation. It gets out of the air blast fan shaft in such a way that trajectory of air motion bends several times in the bent flow channel. A dilation of the upper base has a flow connecting passage made on its inner side to connect the flow internal passage with the flow outlet passage. A cylindrical section has the end surface communicating with the first lateral end surface of the lower body. The dilation has the end surface communicating with the first side of the outer body to form a branchy part between the second lateral end surface of the lower body and the end surface of the upper body dilation, which directs air going in the flow connecting passage to a slow recirculated line and a bandy flow channel.

EFFECT: design of vacuum cleaner allows for decreasing noise made by electric motor through the outlet due to widening the outlet.

17 cl, 8 dwg