ADAPTOR FOR INDUCED DRAFT FAN, AND INDUCED DRAFT FAN AND DRAFT FAN SYSTEM USING SAME

摘要

An adaptor for an induced draft fan, and an induced draft fan and a draft fan system using same; the adaptor (4) comprises a fitting section (41), a transition section (42) and an outlet section (43), the fitting section (41) and the outlet section (43) being respectively located at either end of the transition section (42); the fitting section (41) comprises an inner ring (411) and an outer ring (412), the top end of the outer ring (412) is connected to the transition section (42), and the tail ends of the inner ring (411) and the outer ring (412) are connected to a connecting plate (413); the adaptor (4) is mounted at an air outlet (16), and the inner wall surface of the inner ring (411) is tightly fitted with the outer surface of an air discharge pipe (15). The present invention simplifies the mounting structure, reduces the number of parts, and makes the mounting simple and efficient.