| 摘要 |
PROBLEM TO BE SOLVED: To provide an air supply cylinder for relay capable of maintaining performance even in an installation condition that air supply resistance is large.SOLUTION: An air supply cylinder for a relay in this invention is an air supply cylinder 12 for relay that is connected between a body side air supply cylinder 11 connected to an air blower for combustion included in the body of heating equipment 3, and an air supply cylinder 13 for extension taking in combustion air from outside. The air supply cylinder 12 for relay has: a large diameter part R2 whose inner diameter is larger than that of the air supply cylinder 13 for extension; and a small diameter part R3, whose inner diameter is smaller than the diameter of the air supply cylinder 13 for extension, closer to the side of the air supply cylinder 13 for extension than the large diameter part R2.SELECTED DRAWING: Figure 2 |
