Patent ID: 9650943
Date: 2017-05-16
CPC Classifications: F01P,F16K,Y10T

Claim:
1. A rotary valve comprising: a rotor that is rotated to open and close a flow passage; and a casing that accommodates the rotor, wherein the casing is provided with a rotor accommodating space that rotatably accommodates the rotor, the casing including at least one inflow side opening through which a fluid flows in from outside to the rotor accommodating space and at least one outflow side opening through which the fluid flows out from the rotor accommodating space to the outside, respectively at positions opposite to an outer circumferential surface of the rotor, wherein the rotor is formed in a cylindrical shape having an internal space, wherein circular end surfaces at opposing ends of the rotor are each provided with an end surface side opening that communicates with the internal space in the rotation axis direction of the rotor, wherein the outer circumferential surface of the rotor is provided with a rotor outer circumferential opening that communicates with one opening of the at least one inflow side opening and the at least one outflow side opening of the casing when arranged opposite to the one opening and a rotor outer circumferential blocking surface that blocks the one opening when arranged opposite to the one opening, wherein a first interval is formed between the outer circumferential surface of the rotor and an inner circumferential surface of the casing that opposes the outer circumferential surface of the rotor, the first interval excluding the one opening that is blocked by the rotor outer circumferential blocking surface of the rotor, such that the fluid can flow through the first interval, wherein a second interval is formed between the circular end surface at one end of the rotor and the casing such that the fluid can flow in from the end surface side opening to the rotor or can flow out from the rotor, and wherein a third interval is formed between the circular end surface at the other end of the rotor and the casing such that the fluid can flow in from the end surface side opening to the rotor or can flow out from the rotor.