US 2012/0024398 A1Published application

Multi-way reversing valve

AssigneeFujikoki Corporation

InventorTakeshi Kannoo

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Abstract

A multi-way reversing valve where a high-pressure passage part into which a high-pressure fluid is introduced is formed in a valve member. A valve seat part and valve chamber are in a valve body. First and second inlet/outlets (in communication with an outlet of the high-pressure passage part) are formed in the valve seat part. A low-pressure fluid is introduced into the valve chamber via the first or second inlet/outlet. An outlet-side end part of the high-pressure passage part is adapted to slide while pressed against a part of the valve seat part between the first and second inlet/outlet during a transitional stage of flow path reversal. The positions/dimensions/shapes of the outlet of the high-pressure passage part (and the first, second inlet/outlets) are designed so the high-pressure passage part outlet is in communication with at least one of the first/second inlet/outlet even during the transitional stage of flow path reversal.

Claims7

Dependent claims

A multi-way reversing valve comprising:

a valve member adapted to be rotated by an actuator or motor, in order to reverse flow paths;
and
a valve body adapted to rotatably hold the valve member;
wherein a high-pressure passage part adapted to have a high-pressure fluid introduced thereinto is formed within the valve member;
wherein a valve seat part is provided in the valve body, the valve seat part having a plurality of flow-out ports formed therein, the plurality of flow-out ports being adapted to be selectively placed in communication with an outlet of the high-pressure passage part;
wherein an outlet-side end part of the high-pressure passage part of the valve member is adapted to slide while being pressed against the valve seat part during a transitional stage of flow path reversal;
and
wherein positions, dimensions and shapes of the outlet of the high-pressure passage part and of the plurality of flow-out ports are designed in such a manner that, even during the transitional stage of flow path reversal, the outlet of the high-pressure passage part would be in communication with at least one of the plurality of flow-out ports.

5 more elements

Dependencies are inferred from the claim text.