The University of Tokyo

Waki Factory Inc.

Seiko Epson Corporation

Futaba Industrial Co., Ltd.

M-k Sale Co., Ltd.

Kandori Industry Ltd.

Tsunehito Wake

Shiro Ikuta

Naoki Shikazono

Isamu Kandori

Jiro Nakajima

Koji Matsuoka

Hitoshi Onishi

A heat receiver is configured to cool down a liquid crystal panel in a rectangular shape used for a liquid crystal projector that causes light to be transmitted through the liquid crystal panel and thereby displays a projected image. The heat receiver includes a window portion in a rectangular shape formed to come into contact with an outer periphery of the liquid crystal panel; a flat annular flow path formed on an outer circumferential side of the window portion to surround the window portion and configured to have a narrowed portion in a region along one side of the window portion; and two supply discharge flow paths formed in a neighborhood of two corners of the window portion arranged across the narrowed portion to supply and discharge a heat exchange medium.

Heat receiver having an annular flow path and manufacturing method of the same

A heat exchanger assembled from multiple heat exchanging tubes. Each of the multiple heat exchanging tubes is formed as a flattened tube of 0.5 mm in thickness by press work or bending work of a stainless steel plate member having a thickness of 0.1 mm. Each of the multiple heat exchanging tubes is structured to have multiple lines of sequential wave crests and multiple lines of sequential wave troughs formed on each of flattened faces of the heat exchanging tube. The multiple lines of the sequential wave crests and the multiple lines of the sequential wave troughs are arranged to have a preset angle &#x3b3; relative to a main stream of an air flow. The lines of the sequential wave crests and the lines of the sequential wave troughs are symmetrically folded back about folding lines arranged at a preset interval W along the main stream of the air flow.

Heat exchanger

A plurality of flat tubes formed as a tube having notches by linearly cutting upper and lower parts from a hollow flat circular doughnut shape are stacked to structure a tube laminate. It is attached to a case so that a notch aligns with the notch and faces upward by an exhaust inflow end plate and that a notch aligns with the notch and faces downward by an exhaust outflow end plate. A cutoff valve is provided at an exhaust outflow end of an exhaust communication tube passing through the center of the tube laminate by heat insulation. While an internal combustion engine is warming up, the cutoff valve is closed to cause the exhaust to flow in gaps of the respective flat tubes from upward to downward as a whole and also a heat exchange medium is caused to flow in the respective flat tubes from downward to upward as a whole to have heat exchanged between the exhaust and the heat exchange medium to recover the exhaust heat.

Heat recovery system

Growing community of inventors

Tokyo, Japan

Tsunehito Wake