Title:
ELECTRONIC EXPANSION VALVE, CONTROL SYSTEM, AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2018/033025
Kind Code:
A1
Abstract:
Provided are an electronic expansion valve (100), a control system, and a control method, comprising: a step motor (10) and a Hall sensor (3); the step motor comprises a rotor (1) and a stator (2); the rotor comprises a permanent magnet; the Hall sensor is provided on the outer periphery of the permanent magnet; the Hall sensor and rotor are arranged in the radial direction, and the stator and Hall sensor are arranged in the axial direction; the main-body part (31) of the Hall sensor is used for sensing the magnetic pole change of said permanent magnet; such a structure reduces the effect that an operating environment has on the Hall sensor when detecting a signal.
Inventors:
ZHANG BIN (CN)
LAN YAOFENG (CN)
JIANG JUNXIAO (CN)
LAN YAOFENG (CN)
JIANG JUNXIAO (CN)
Application Number:
PCT/CN2017/097048
Publication Date:
February 22, 2018
Filing Date:
August 11, 2017
Export Citation:
Assignee:
HANGZHOU SANHUA RES INST CO LTD (CN)
International Classes:
F25B49/00; F16K31/04; H02K37/00
Foreign References:
| CN201830125U | 2011-05-11 | |||
| CN103968621A | 2014-08-06 | |||
| CN204597830U | 2015-08-26 | |||
| CN103944343A | 2014-07-23 | |||
| CN104092344A | 2014-10-08 | |||
| US4794312A | 1988-12-27 | |||
| EP0992397A1 | 2000-04-12 |
Other References:
See also references of EP 3502531A4
Attorney, Agent or Firm:
UNITALEN ATTORNEYS AT LAW (CN)
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