Abstract: An air blower includes a base having a raised column, an arcuate recess between an inner face of the base and an outer periphery of the column and a bottom nozzle, a fan assembly mounted on top of the raised column to generate air flow and having a conical top face, and a cap securely combined with the base and having a top nozzle combined with the bottom nozzle to form an outlet so that the air flow generated by the fan assembly is first directed to the inner face of the cap and then spiraled downward along the raised column to escape the outlet via the arcuate recess.

Abstract: A heating assembly for a respiratory treatment machine includes a base and a water tank. The base has a receiving space communicating with a recessed platform at a via an opening, and a heating plate securely placed on a bottom face of the receiving space. The water tank has a main receptacle, a secondary receptacle integrally formed and communicating with the main receptacle and movably received inside the receiving space, a conducting plate securely provided at a bottom face of the main receptacle and an extension integrally formed with the conducting plate and provided at a bottom face of the secondary receptacle. The extension has a dimension corresponding to that of the heating plate such that after the secondary receptacle is received inside the receiving space, the extension is placed on top of the heating plate and engaged with the heating plate.