| 摘要 |
PROBLEM TO BE SOLVED: To simplify the work for forming a drain passage of defrost water. SOLUTION: Front and rear flanges 54, 55 of hard resin are formed on one of connection ports 52 of an elbow 50, and a contact part 57 of soft resin, having a projection 58 is formed on the rear flange 55. An opening 41 of an inner box 11 is nipped from its front and rear sides by the flanges 54, 55, and the soft contact part 57 is closely kept into contact with an opening edge part 42 on a rear side, and sealed. The other connection port 53 has a double cylindrical structure composed of an inner cylinder 60 and an outer cylinder 61 of hard resin, and a fitting part 62 of soft resin, having a projection 64 is formed on a tip side of the outer cylinder 61. An end part of a drain pipe 35 is fitted between the inner and outer cylinders 60, 61, and the fitting part 62 is closely kept into contact with an outer peripheral face of the drain pipe 35 and sealed. The soft resin part and the hard resin part are integrally formed by two-color molding. The intrusion of resin foam in manufacturing and the leakage of defrost water in use can be prevented without performing extra seal-up. COPYRIGHT: (C)2005,JPO&NCIPI
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