公开(公告)号：US20220397353A1

公开(公告)日：2022-12-15

申请号：US17664664

申请日：2022-05-24

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： SHOZO OCHI ,  MASATO MAEDE ,  TOMONARI NEBASHI ,  RYO ISHIKAWA

IPC: F28F21/08 ,  B23K20/12 ,  H05K7/20

Abstract: A cooling unit includes a unit main body including a bottom portion, a peripheral wall portion rising from the peripheral edge of the bottom portion, and a sealing body for sealing an opening of the unit main body. The unit main body is joined to the sealing body through a plasticized region, and a void is formed at a position close to the unit main body with respect to a center of the plasticized region.