US 12,435,910 B2
Cryocooler
Haibing Li, Guangdong (CN); Yibing Zhang, Guangdong (CN); Zhaohui Yang, Guangdong (CN); and Shengli Huang, Guangdong (CN)
Assigned to LIHAN CRYOGENICS CO., LTD., SHENZHEN (CN), Longhua Shenzhen (CN)
Filed by LIHAN CRYOGENICS CO., LTD., SHENZHEN (CN), Guangdong (CN)
Filed on Aug. 17, 2023, as Appl. No. 18/235,270.
Application 18/235,270 is a continuation of application No. PCT/CN2022/097467, filed on Jun. 7, 2022.
Claims priority of application No. 202111148585.8 (CN), filed on Sep. 29, 2021.
Prior Publication US 2023/0400228 A1, Dec. 14, 2023
Int. Cl. F25B 9/14 (2006.01)
CPC F25B 9/14 (2013.01) [F25B 2500/13 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A cryocooler, comprising a shell, a compression unit, an expansion unit and a vibration damping unit, wherein a cavity is provided in the shell, the compression unit and the vibration damping unit are located in the cavity, the compression unit is connected to the shell, and the expansion unit is partially located in the cavity and communicates with the compression unit;
the vibration damping unit is sleeved on the compression unit, is partially located in the compression unit and is configured to reduce vibration of the compression unit;
wherein the vibration damping unit is coaxially arranged with the compression unit, the compression unit comprises a first stator and a first coil located in the first stator, the vibration damping unit comprises a second coil that is located in the first stator and outside the first coil;
wherein the compression unit further comprises a gas isolator, a cylinder and a first mover, the first stator is sleeved on the gas isolator, a first end of the gas isolator in an extension direction of the gas isolator is abutted against an inner wall of a first end of the shell, and a second end of the gas isolator in the extension direction of the gas isolator is abutted against an inner wall of a second end of the shell, so as to separate the cavity into a first cavity chamber and a second cavity chamber, and the first cavity chamber surrounds a peripheral side of the second cavity chamber; and
the first stator, the first coil and the vibration damping unit are located in the first cavity chamber, the cylinder and the first mover are located in the second cavity chamber, and the first mover comprises a piston and a first magnet, the piston comprises a first plugging part and a connecting part connected with the first plugging part, the first plugging part is located in the cylinder and reciprocates along an axial direction of the cylinder, the connecting part is located outside the cylinder, and the first magnet is sleeved on the connecting part and connected with the connecting part.