US 12,145,426 B2
Electric valve and thermal management system
Rongrong Zhang, Zhejiang (CN); Yiyuan Pan, Zhejiang (CN); Ke Yuan, Zhejiang (CN); and Tuping Chen, Zhejiang (CN)
Assigned to HANGZHOU SANHUA RESEARCH INSTITUTE CO., LTD., Zhejiang (CN)
Appl. No. 17/911,169
Filed by HANGZHOU SANHUA RESEARCH INSTITUTE CO., LTD., Zhejiang (CN)
PCT Filed Mar. 12, 2021, PCT No. PCT/CN2021/080344
§ 371(c)(1), (2) Date Sep. 13, 2022,
PCT Pub. No. WO2021/180191, PCT Pub. Date Sep. 16, 2021.
Claims priority of application No. 202010175679.3 (CN), filed on Mar. 13, 2020.
Prior Publication US 2023/0147150 A1, May 11, 2023
Int. Cl. B60H 1/32 (2006.01)
CPC B60H 1/3205 (2013.01) [B60H 2001/3254 (2013.01); B60H 2001/3264 (2013.01); B60H 2001/3285 (2013.01)] 14 Claims
OG exemplary drawing
 
1. An electric valve, comprising a valve core, a valve seat, an electric control part and a driving part, wherein a first flow passage and a second flow passage are formed in the valve seat, and the electric valve is formed with a valve port, wherein the valve port is located between the first flow passage and the second flow passage, wherein the valve core is capable of moving relative to the valve port and changing the opening degree of the valve port, the electric control part is configured to control the driving part, and the driving part drives the valve core to move, wherein the electric valve further comprises a pressure sensing unit, the pressure sensing unit is connected with the valve seat, and the pressure sensing unit is capable of sensing a pressure characteristic of the working medium in a detection flow passage and form a piezoelectric signal, wherein the electric control part comprises an electric control board, the piezoelectric signal forms an electrical signal corresponding to the pressure characteristic by a conditioning circuit, and the electrical signal is used as a part of a signal for controlling the driving part,
wherein the valve seat is provided with a first mounting cavity, the pressure sensing unit is located in the first mounting cavity, wherein the valve device further comprises a first position-limiting part and a first connecting piece, wherein the pressure sensing unit is position limited to the valve seat by the first position-limiting part, and the electric control board and the pressure sensing unit are electrically connected by the first connecting piece,
wherein the first position-limiting part comprises a first clamping spring and a first clamping groove that is located in the valve seat, the first clamping spring is capable of being clamped in the first clamping groove, wherein the first clamping spring is blocked on an upper side of the pressure sensing unit, and a first sealing ring is arranged between a lower side of the pressure sensing unit and the valve seat; and/or, the pressure sensing unit is a ceramic capacitive pressure sensor.