Fluid handling – Systems – Multi-way valve unit
Patent
1995-06-06
1998-08-04
Fox, John
Fluid handling
Systems
Multi-way valve unit
13762521, F25B 1300
Patent
active
057879290
ABSTRACT:
A four-way change-over valve for an air conditioner has first to fourth piping holes sequentially arranged on a concentric circle at a predetermined pitch in a planar portion of a valve seat formed in a thick disk shape as one portion of a valve case. The change-over valve also has a rotary valve rotatably arranged on an upper face of this valve seat and having at least one communicating groove for independently connecting two adjacent piping holes of the four piping holes to each other. Cooling and heating operations of the air conditioner are switched by rotating the rotary valve. A service valve with a four-way change-over valve for an air conditioner is characterized in that both service valves on liquid and gas sides of a refrigerant circuit are integrated with each other and are further integrated with the four-way change-over valve as one valve unit with one valve seat as a common valve seat. In accordance with such valve structures, the four-way change-over valve has a simplified structure and is made compact. Further, the service valve is also made compact and operability of the service valve is improved.
REFERENCES:
patent: 4139355 (1979-02-01), Turner et al.
Conlin David G.
Daley, Jr. William J.
Fox John
Pacific Engineering Co., Ltd.
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