Volute fan assembly structure and floor-standing air conditioner

A volute fan assembly structure comprises an installation plate (4) and at least two adjacent volute fans installed on the installation plate (4). One of the two adjacent volute fans has a middle air outlet located between the two adjacent volute fans. The volute fan having the middle air outlet is located in a more forward position than the other volute fan in a front-and-rear direction vertical to the installation plate. The volute fan assembly structure can stagger an air outlet of a second volute fan (2) from a first volute fan (1) and a third volute fan (3) to reduce interference. Also provided is a floor-standing air conditioner having the volute fan assembly structure.