JPS5575596A - Fan - Google Patents

Abstract

PURPOSE:To make room air circulation and compulsory ventilation simultaneously wherein the atmospheric air sucked through the supply passages of a ventilation tube is mixed with suction room air, and mixture air is fed to a room while a portion thereof is discharged through the discharge passages of the tube. CONSTITUTION:A room air (a) suction port 8, a room discharge port 10, and a supply and discharge ventilation tube 19 are provided in a box 1. A number of supply and discharge passages 11 and 16 are arranged adjacent to each other at a fixed space of intervals in the tube 19 so that the former's atmosphere suction ports may face axially and the latter's outdoor discharge ports may be open at the outer- circumferential face of the box 1. Heat is exchangeable between the passages 11 on one hand and the passages 16 on the other via a duct-shaped partition plate. The air (a) and air (b) are sucked by an impeller 3 through a suction port 8 and the passages 11 respectively, and mixed with each other. Mixture air (c) is fed to a room through a discharge port 10 while a portion thereof is discharged outside the room through the passages 16. Therein, the air (b) in the passages 11 exchanges heat with the air (a) in the passages 16.