Mahle Filter Systems Japan Corporation

Shozo Wakamatsu

Masahiro Ariyama

Kenji Wada

Tadashi Nishikoba

Kakuei Kunii

What is disclosed is a heat exchanger including: a core including a plurality of core plates, first and second passages, and a vertical passage; a base plate including a passage port; and a distance plate; wherein the first vertical passage and the passage port are arranged apart from each other in a direction orthogonal to a stacking direction of the core plates, and wherein the distance plate includes a bottom wall part and a swelling part, the bottom wall part being a thin plate-shaped and being joined to an upper surface of the base plate, the swelling part swelling up in the stacking direction from the bottom wall part so as to surround a circumference of a communication passage which communicates the first vertical passage with the passage port and being joined to a lowermost surface of the core in a flange part of a tip of the swelling part.

Heat exchanger

An oil cooler has a core portion () formed of stacked core plates (), a bottom plate (), a second bottom plate () and a top plate (), and these are brazed in a furnace. The core plate () has oil communication ports (), cooling water communication ports () and an oil outlet port (). The lower end core plate () has a boss portion () surrounding the cooling water communication port () and a boss portion () surrounding the oil outlet port (). Opening portions () opposite to the boss portions () are formed through the bottom plate (). Therefore, at the time of the brazing, a melted brazing material is not excessively gathered in the boss portion () because the melted brazing material is absorbed in the opening portions ().

By stacking a plurality of core plates () each of which has, around a peripheral edge of a base portion (), an outer peripheral tapered portion () that expands outward, and joining the outer peripheral tapered portions () of adjacent core plates by brazing, a heat exchanging fluid passage () is defined between the base portions () of the adjacent core plates. Outer and inner peripheral surfaces of the outer peripheral tapered portion are shaped to extend straightly in cross section. A leading end part of the outer peripheral tapered portion () is formed at the inner peripheral surface thereof with a recess () that is depressed toward the outer peripheral surface.

Growing community of inventors

Fujimino, Japan

Shozo Wakamatsu