Volute type centrifugal fan

The utility model provides a volute type centrifugal fan which is characterized in that a base installation groove is formed in one side of a shell, a plurality of polygonal groove blocks are arranged in the base installation groove, the polygonal groove blocks surround the inner wall of the base installation groove, the polygonal groove blocks form a plurality of installation positions in the base installation groove, and an installation angle is formed between every two adjacent polygonal groove blocks; and the fixed base comprises a mounting frame and a mounting clamp arranged on the mounting frame, and the mounting clamp and the mounting position are clamped, so that the volute type centrifugal fan can be more conveniently and quickly mounted at multiple angles. 本实用新型提供一种蜗壳式离心风机，包括：壳体的一侧设有底座安装槽，底座安装槽内设置有若干多边形槽块，多边形槽块沿底座安装槽的内壁环绕，多边形槽块在底座安装槽内形成有若干安装位，相邻的多边形槽块之间形成有安装角；固定底座，包括有安装架，及一设置于安装架上的安装卡，该安装卡与安装位形成卡持，从而可以更方便快捷的以多个角度来安装蜗壳式离心风机。