Heat exchanger with integrated thermal bypass valve

摘要

A heat exchanger apparatus containing a heat exchanger, a fitting at the fluid inlet and a thermally actuated bypass valve positioned in a fluid inlet manifold of the heat exchanger. The valve contains a sleeve having first and second slots, that permit fluid flow from a fluid inlet to a bypass or fluid inlet manifold. A drum positioned within the sleeve is movable from a first to a second position, and has an aperture that permits fluid flow to the first or second slot. An actuator engages the drum and actuates it to move from the first to the second position. The sleeve further contains a lip positioned between the fitting and a bypass channel cover plate for affixing the sleeve in position.

主权项

1. A heat exchanger apparatus comprising:
a heat exchanger including
a plurality of plates defining a first fluid channel, a second fluid channel and a bypass channel;a first fluid inlet manifold having a first fluid inlet and a first fluid outlet manifold having a first fluid outlet, the first fluid inlet manifold and the first fluid outlet manifold being in fluid communication with the first fluid channel; and, the first fluid inlet manifold also being in fluid communication with the bypass channel; and a thermal bypass valve positioned in the first fluid inlet manifold, the thermal bypass valve including:
a sleeve having a first slot and a second slot, the first slot permitting fluid flow from the first fluid inlet to the bypass channel, and the second slot permitting fluid flow from the first fluid inlet to the first fluid inlet manifold;a drum positioned within the sleeve and slidably movable from a first position to a second position, the drum having a first aperture and one or more additional apertures, the first aperture in fluid communication with the first fluid inlet and the one or more additional apertures directing a first fluid to the first slot in the first position or the second slot in the second position;a thermal actuator engaging the drum and actuating the drum to move from the first position to the second position in response to the temperature of the first fluid, and a fitting at the first fluid inlet,
and wherein the sleeve further comprises a lip positioned between the fitting and a bypass channel cover plate.