Invention Grant
- Patent Title: Refrigerant control valves
- Patent Title (中): 制冷剂控制阀
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Application No.: US12924702Application Date: 2010-10-01
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Publication No.: US08443838B1Publication Date: 2013-05-21
- Inventor: Carlos Quesada Saborio
- Applicant: Carlos Quesada Saborio
- Agent James Creighton Wray
- Main IPC: F16K47/08
- IPC: F16K47/08

Abstract:
A refrigerant valve has a body with a through bore. Multiple tubes have openings aligned in a ring around a middle of the bore. The tubes lead to larger channels in the body. A needle assembly inserted through an end of the bore reciprocates a needle with a stepper motor and speed reducer to precisely control sizes of the openings. Further advancing the needle shaft after closing the openings to the tubes, engages and slides a bypass sleeve against a return spring force to open a bypass in a side of the valve body. A connector connects the bypass in a first end of the bore to outward opening holes of the channels.
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