Usui Kokusai Sangyo Kaisha Limited

Nagahisa Amano

Masayoshi Usui

Koichi Hayashi

Tetsuo Ogata

Yasuaki Hashimoto

Shu Yotsumoto

Shigeyuki Ishida

Kazuo Iwasaki

Takamitsu Kobayashi

Yusushi Tsuchiya

Koji Kurita

Yoshinori Ishii

Kazuya Suzuki

A heat exchanger having excellent heat exchanging performance is obtainable by a simple production technique and at a low cost. This is achieved by providing a fin member and by increasing heat conductivity between the fin member and a meandering pipe body. Further, the heat exchanger is made compact for high degrees of layout freedom, enabling the heat exchanger to be installed in a tight space. Engagement grooves () are provided in both end surfaces (), which are opposite to each other, of a fin member () in which fins () are parallel arranged. Straight pipe sections () are parallelly arranged, with gaps ()in between, in the engagement grooves () of the fin member (). The straight pipe sections ()are connected at bent sections (). A pair of meandering sections () is arranged opposite to each other with an insertion gap () of the fin member () in between. On () of the meandering sections and the other meandering section () are connected by a connection pipe () to form a meandering pipe main body (). The straight pipe sections () of the one meandering section () are arranged in the engagement grooves () in the one end surface () of the fin member () inserted and arranged in the insertion gap () between the one meandering section () and the other meandering section () of the meandering pipe body (), and the straight pipe sections () of the other meandering section () are arranged and fixed in the engagement grooves () in the other end surface ().

Heat exchanger

A joint for piping includes a pipe with an annular swelling wall and a connector body with a socket that includes locking pieces. The locking pieces hold the annular swelling wall when the pipe is inserted through the connector body to connector the pipe to the connector body. A projected member on the pipe fits in a recess on the connector body to prevent rotation between the pipe and the connector body.

Joint for piping

Growing community of inventors

Mishima, Japan

Nagahisa Amano