Title:
SCREW COMPRESSOR AND CONTROL METHOD THEREFOR
Document Type and Number:
WIPO Patent Application WO/2020/143229
Kind Code:
A1
Abstract:
A screw compressor (100), comprising a screw rotor (110) and a spool valve (120). The screw rotor (110) comprises a suction head end (111) and an exhaust tail end (112). Gas is sucked in from the suction head end (111) and compressed gas is discharged from the exhaust tail end (112). The spool valve (120) comprises a working side (125) for sealing a compression chamber of the screw rotor (110). The working side (125) comprises a spool valve head end (121) and a spool valve tail end (122) and can do a reciprocating motion along the axis direction of the screw rotor (110). When the spool valve (120) moves to a suction capacity adjusting position (240), the spool valve head end (121) is located at the inner side of the suction head end (111) of the screw rotor (110), and a suction capacity adjusting distance (D2) is formed between the spool valve head end (121) and the suction head end (111) so that the suction capacity of the screw compressor is adjusted. The suction capacity of the screw compressor (100) can be adjusted by means of the spool valve (120), so that the problem of motor temperature and exhaust gas temperature limits of conventional variable frequency screw sets is effectively solved and the operational range and the load regulation ability of the screw compressor are expanded.
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Inventors:
ZHU YU (CN)
YU ZHENGXIANG (CN)
ZENG FANFEI (CN)
ZHANG FENGZHI (CN)
YU ZHENGXIANG (CN)
ZENG FANFEI (CN)
ZHANG FENGZHI (CN)
Application Number:
PCT/CN2019/101576
Publication Date:
July 16, 2020
Filing Date:
August 20, 2019
Export Citation:
Assignee:
YORK WUXI AIR CONDITIONING AND REFRIGERATION CO LTD (CN)
JOHNSON CONTROLS TECH CO (US)
JOHNSON CONTROLS TECH CO (US)
International Classes:
F04C18/16; F04C28/20
Foreign References:
| CN204099200U | 2015-01-14 | |||
| JP2000199491A | 2000-07-18 | |||
| CN103486037A | 2014-01-01 | |||
| US4457681A | 1984-07-03 | |||
| CN108035877A | 2018-05-15 | |||
| CN201420548889U | 2014-09-23 | |||
| CN2017095491W | 2017-08-01 |
Other References:
See also references of EP 3910197A4
Attorney, Agent or Firm:
TUO YING LAW OFFICES (SHANGHAI) (CN)
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