US 11,971,108 B2
Rotary valve of cryocooler and cryocooler
Mingyao Xu, Nishitokyo (JP); and Qian Bao, Nishitokyo (JP)
Assigned to SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed by SUMITOMO HEAVY INDUSTRIES, LTD., Tokyo (JP)
Filed on Nov. 9, 2020, as Appl. No. 17/092,322.
Application 17/092,322 is a continuation of application No. PCT/JP2019/019488, filed on May 16, 2019.
Claims priority of application No. 2018-098966 (JP), filed on May 23, 2018.
Prior Publication US 2021/0071767 A1, Mar. 11, 2021
Int. Cl. F16K 11/074 (2006.01); F16K 31/04 (2006.01); F25B 41/20 (2021.01)
CPC F16K 11/074 (2013.01) [F16K 31/041 (2013.01); F25B 41/20 (2021.01); F25B 2309/14181 (2013.01)] 13 Claims
OG exemplary drawing
 
1. A rotary valve of a cryocooler, comprising:
a valve stator;
a valve rotor;
a rotation member that rotates the valve rotor around an axis with respect to the valve stator;
a rotor holder connected to the valve rotor so as to rotate around the axis together with the valve rotor, and forming a low pressure section having a pressure lower than an ambient pressure between the valve rotor and the rotor holder so as to reduce an axial force of pressing the valve rotor against the valve stator; and
a valve bearing that supports the rotor holder to be rotatable around the axis,
wherein the rotation member is connected to the rotor holder so as to rotate the valve rotor around the axis via the rotor holder, and
the rotor holder is disposed between the rotation member and the valve rotor in an axial direction, and is movable in the axial direction with respect to the rotation member,
wherein an outer periphery of the rotor holder comprises an engagement portion adjacent to an axially upper side of the valve bearing.