US 12,480,582 B2
Electronic expansion valve
Yuchen He, Zhejiang (CN); Yonghao Chen, Zhejiang (CN); Shaojun Zhan, Zhejiang (CN); Kepeng Zhang, Zhejiang (CN); Jinqiang Lou, Zhejiang (CN); Jun Zhao, Zhejiang (CN); and Leqiang Liu, Zhejiang (CN)
Assigned to ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO., LTD., Zhejiang (CN)
Appl. No. 18/688,768
Filed by ZHEJIANG DUNAN ARTIFICIAL ENVIRONMENT CO., LTD., Zhejiang (CN)
PCT Filed Aug. 30, 2022, PCT No. PCT/CN2022/115942
§ 371(c)(1), (2) Date Mar. 2, 2024,
PCT Pub. No. WO2023/030337, PCT Pub. Date Mar. 9, 2023.
Claims priority of application No. 202122112662.6 (CN), filed on Sep. 2, 2021; application No. 202122113665.1 (CN), filed on Sep. 2, 2021; application No. 202122116122.5 (CN), filed on Sep. 2, 2021; and application No. 202122116505.2 (CN), filed on Sep. 2, 2021.
Prior Publication US 2024/0384799 A1, Nov. 21, 2024
Int. Cl. F16K 1/42 (2006.01); F16K 1/32 (2006.01); F16K 1/38 (2006.01); F16K 1/54 (2006.01); F16K 27/02 (2006.01); F16K 31/02 (2006.01)
CPC F16K 1/42 (2013.01) [F16K 1/32 (2013.01); F16K 1/38 (2013.01); F16K 1/54 (2013.01); F16K 27/029 (2013.01); F16K 31/02 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An electronic expansion valve, comprising:
a valve seat provided with a valve cavity and a valve port, wherein the valve port is provided at an end portion of the valve cavity;
a guide sleeve fixedly arranged on the valve seat, wherein the guide sleeve and the valve port are oppositely arranged, the guide sleeve is provided with a first guide hole, and the first guide hole is in communication with the valve cavity; and
a valve needle movably arranged in the guide sleeve, wherein a first end of the valve needle penetrates out of the first guide hole to be arranged corresponding to the valve port, the valve needle is in clearance fit with the first guide hole, the valve needle is configured to control the valve port to be opened or closed, and a swingable amplitude of the valve needle in the first guide hole ranges from 0.4° to 2.4°;
wherein the guide sleeve is further provided with a second guide hole, the second guide hole is coaxially arranged with the first guide hole, the second guide hole is positioned at an end, away from the valve cavity, of the first guide hole and is in communication with the first guide hole, and an aperture of the second guide hole is greater than an aperture of the first guide hole; and the electronic expansion valve further comprises a spring sleeve and a spring, wherein the spring sleeve is movably arranged in the second guide hole, a second end, away from the valve port, of the valve needle is positioned in the spring sleeve, the spring is positioned in the spring sleeve, and a first end of the spring abuts against the valve needle.