Hidden indoor unit of air conditioner

A hidden indoor unit of an air conditioner comprises a machine shell, volutes, air outlet frames connected with the volutes, heat exchangers and an electric control box. A centrifugal wind wheel and a motor are arranged in each volute, water receiving discs are arranged below the heat exchangers, dust filtration screens are arranged right ahead of the heat exchangers, the air inlets of the volutes and the air outlet of the indoor unit are all formed in the front face of a machine body, and the heat exchangers are arranged right ahead of the air inlets of the volutes. Air supply channels in the machine shell and the volutes are transversely or vertically arranged, the vertical type or horizontal type indoor unit with various different air inlet modes and air outlet modes in the front face is obtained, a double-volute centrifugal wind wheel fan is vertically or horizontally placed, and the high-power air conditioner indoor unit is obtained. The hidden indoor unit of the air conditioner is compact in structural