Automatic temperature and humidity regulation – Thermostatic – With pressure control
Reexamination Certificate
2008-05-29
2010-12-21
Norman, Marc E (Department: 3744)
Automatic temperature and humidity regulation
Thermostatic
With pressure control
C062S160000, C062S222000
Reexamination Certificate
active
07854390
ABSTRACT:
A first expansion valve may be provided in an outdoor unit, and a second expansion valve may be provided in an indoor unit. A pipe line connects a first joint pipe of the first expansion valve and a second joint pipe of the second expansion valve. When a refrigerant flows in from the second joint pipe and flows out from the first joint pipe, the first and second expansion valves are in a full open state due to pressure of the refrigerant. When the refrigerant flows in from the first joint pipe and flows out from the second joint pipe, the first and second expansion valves are in semi-closed state (flow rate controlling state). In a cooling mode, the second expansion valve expands the refrigerant just before an indoor heat exchanger, and in a heating mode, the first expansion valve expands the refrigerant just before an outdoor heat exchanger. In both heating and cooling modes, a large amount of refrigerant may flow through the pipe line to reduce pressure loss.
REFERENCES:
patent: 4372486 (1983-02-01), Tomioka et al.
patent: 6354510 (2002-03-01), Petersen
patent: H665915 (1994-08-01), None
patent: 2000266194 (2000-09-01), None
Kabushiki Kaisha Saginomiya Seisakusho
Norman Marc E
Reising Ethington P.C.
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