| 摘要 |
PURPOSE:To positively perform defrosting of the entire part of the outer periphery of a heat transfer tube by forming a negative pressure zone between heat transfer tubes at a part opposing an airstream in each of heat transfer tubes, generating a vortex flow in the negative pressure zone, and extending an inductor guiding solid particles to the side of the opposing part. CONSTITUTION:At a part 2a opposing an airstream (a) in each of heat transfer tubes, a T-shaped inductor 6 consisting of a perpendicular wall 6a and a horizontal wall 6b is mounted. When it is assumed that the length of the perpendicular wall is L and the broadth of the horizontal wall 2H, the inductor 6a is formed to have the relationship of L<=10H. When it is assumed that L=2H, the airstream (a) blasted to the heat transfer tube 2 makes detour at both ends of the horizontal wall 6b and a vortex flows (c) are actively generated between the horizontal wall 6b and the opposing part. As a result, solid particles 4 are brought into fluidized contact with the side of the opposing part 2a. By these procedures, the solid particles 4 can be uniformly brought into fluidized contact with the entire part of the outer peripheral wall of the heat transfer tube 2 to positively conduct the defrosting of the entire part of the outer periphery and to improve the heat transfer efficiency of the heat transfer tube.
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