公开(公告)号：JPS62198007A

公开(公告)日：1987-09-01

申请号：JP3992886

申请日：1986-02-25

Applicant: MATSUSHITA REFRIGERATION

Inventor： TSUJITA HIROSHI ,  ITO TAKEMICHI ,  HIKASA HAJIME

IPC: H01B7/00

公开(公告)号：JPS633164A

公开(公告)日：1988-01-08

申请号：JP14641486

申请日：1986-06-23

Applicant: MATSUSHITA REFRIGERATION

Inventor： TSUJITA HIROSHI ,  HIKASA HAJIME

IPC: F25D23/00

公开(公告)号：JPH02251378A

公开(公告)日：1990-10-09

申请号：JP6973189

申请日：1989-03-22

Applicant: MATSUSHITA REFRIGERATION

Inventor： DOMOTO HIDEAKI ,  TSUJITA HIROSHI ,  HIKASA HAJIME ,  ITO TAKEMICHI

IPC: F25B39/02 ,  B23K11/00

Abstract: PURPOSE:To secure refrigerant passages having strength at the time of manufacturing the heat exchanger by welding the outermost peripheral end faces of two plates and providing intermittent weld zones on the refrigerant passages and forming the shape of swellings on bends of a straight line part and circular arc parts in opposition to each other. CONSTITUTION:A first weld zone which is TIG-welded is formed on the outermost peripheral end faces of the two plates 2 and 3 mainly composed of iron leaving an outlet and an inlet of the refrigerant passages 4 and the passage waveform bottoms and a flat plate part are formed of second weld zones 8 which are spot-welded. In addition, the second weld zones 8 form the refrigerant passages 4 combining rectilinear arrangement and orthogonal arrangement. By this method, the strength of the refrigerant passages is improved and the initial refrigerant passages are ensured.