Side-blowing fan

Abstract

A side-blown fan consists of a casing and a blade member inserted in the casing. The casing has a side air outlet and an axial air inlet in the shape of polygon, ellipsoid and the like. There is an air duct between the blade member and the casing.

Description

Technical field [0001] The present invention relates to a side blowing fan, in particular to a side blowing fan that reduces air leakage and increases wind pressure. Background technique [0002] In a system that requires a high back pressure, the prior art uses a blower to provide a higher wind pressure to the system, so that the system can obtain a higher back pressure. figure 1 The system shown is a schematic diagram of the structure of a prior art blower. Please refer to figure 1 The blower 10 is composed of an upper housing 12a, a fan blade member 16, and a lower housing 12b. The upper housing 12a has an axial air inlet 14, and the lower housing 12b has an axial air inlet 11, and is combined with the upper housing A lateral air outlet 13 is formed behind the lower casing 12b and 12a. [0003] In the above-mentioned prior art blower structure, the shape of the axial air inlets 14 and 11 is designed to be circular, and the axial air inlets 14 and 11 are coaxial with the fan ...

AI Technical Summary

Problems solved by technology

However, in this case, since the circular axial air inlet is almost not shielded by the upper and lower casings, when the rotation speed of the fan blade member 16 gradually increases, the airflow flowing therein can easily pass through the air inlet. Overflow to the outside world, resulting in pressure relief (or air leakage), which cannot further increase the wind pressure

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