초록 ▼

A by-pass valve and a heat exchanger employing same is disclosed where the by-pass valve makes a short circuit from the heat exchanger inlet to the heat exchanger outlet to disable the heat exchanger under certain temperature conditions. The by-pass valve includes a housing defining a chamber. Three

A by-pass valve and a heat exchanger employing same is disclosed where the by-pass valve makes a short circuit from the heat exchanger inlet to the heat exchanger outlet to disable the heat exchanger under certain temperature conditions. The by-pass valve includes a housing defining a chamber. Three main ports communicate with the chamber, one being a valve port. A temperature responsive actuator located in the chamber operates a spring loaded valve to open and close the valve port. The valve port can be connected to one of the heat exchanger inlet or outlet, the other main ports are then connected in series with the other of the heat exchanger inlet or outlet.

대표청구항 ▼

[ What is claimed is:] [10.]10. A heat exchanger comprising: an inlet manifold having an inlet opening and an outlet manifold having an outlet opening; a plurality of spaced-apart heat exchange conduits connected between the inlet and outlet manifolds; a by-pass valve including a housing defining a

[ What is claimed is:] [10.]10. A heat exchanger comprising: an inlet manifold having an inlet opening and an outlet manifold having an outlet opening; a plurality of spaced-apart heat exchange conduits connected between the inlet and outlet manifolds; a by-pass valve including a housing defining a chamber therein and first, second and third main ports communicating with the chamber, the first main port being a by-pass valve port, the valve port having a central axis and a peripheral valve seat; means for connecting the valve port to one of the inlet and outlet openings; a temperature responsive actuator located in the chamber and having a reciprocating central shaft disposed along said central axis, the central shaft having a closed end portion for partially closing the valve port; an annular ring slidably mounted on the closed end portion and extending transversely from the central shaft to engage the valve seat and completely close the valve port; bias means for urging the annular ring toward the valve seat; a return spring mounted in the housing below the annular ring and being connected to the central shaft to urge the central shaft end portion to retract and open the valve port; andmeans connecting the second main port, the chamber and the third main port in series with the other of the inlet and outlet openings.