公开(公告)号：JPH10205999A

公开(公告)日：1998-08-04

申请号：JP637497

申请日：1997-01-17

Applicant: MATSUSHITA REFRIGERATION

Inventor： OBATA SHINGO ,  TOKUDA SHIGERU ,  SHIBATOMI MASAHIRO ,  OHIRA SHOJI ,  TANAKA TOSHIO

IPC: F25D23/08

Abstract: PROBLEM TO BE SOLVED: To discharge the air in a space defined by inner and outer boxes stably at the time of filling a foamable thermal insulation material by making a recess in the outer box and air vents for filling the foamable thermal insulation material at the opposite ends of the recess. SOLUTION: A recess 11 is made in an outer box 4 by press and holes 12 are made at the opposite ends thereof so that the air in a space defined by inner and outer boxes 2, 4 is discharged stably at the time of filling a foamable thermal insulation material 3. According to the arrangement, no cavity is generated in the foamed thermal insulation material 3 and the labor conventionally required for bonding a porous soft urethane foams through a paste layer in order to prevent leakage of the foamed thermal insulation material 3 through the air vent along with the air can be saved at the time of filling the foamed thermal insulation material 3. Furthermore, a press pin 13 can be protected against breakage and a steel outer box 4 can be protected against cracking at the time of making the air vent 11 by means of the press pin 13 and a die 14.

公开(公告)号：JPH10339397A

公开(公告)日：1998-12-22

申请号：JP15066897

申请日：1997-06-09

Applicant: MATSUSHITA REFRIGERATION

Inventor： NISHIDA MASAYOSHI ,  OHIRA SHOJI ,  ISODA KEIJI

IPC: F16L35/00 ,  F16L55/00 ,  F25B41/00

Abstract: PROBLEM TO BE SOLVED: To provide an inspection method for metal piping in a structure sealing a pipe end part without using solder of a refrigerator to facilitate regenerative utilization of resources, in the method performing effectively leakage inspection of copper piping for heat radiation mounted in the refrigerator. SOLUTION: A roll-shaped wound copper pie 6 is sizing cut, an end part is diametrically spread, and a slit 7 is provided in both ends of the copper pipe 6. Successively in one end of the copper pipe 6, a labyrinth-shaped bending part 17 is provided, and the end part is sealed. Successively the copper pipe 6 is worked in shape of piping in a front surface part, to be mounted in a steel plate constituting a front surface of a refrigerator. Further, the end part without sealing the copper pipe 6 is welded to an end part of piping in a main body part, inside the piping is pressurized from its opening side, and leakage inspection is performed.