US Patent No: 8,157,184

Number of patents in Portfolio can not be more than 2000

Expansion valve, heat pump type refrigeration cycle apparatus, and air handling unit

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ALSO PUBLISHED AS: 20110120161
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Importance

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Abstract

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A first expansion valve is provided in an outdoor unit, and a second expansion valve is 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 mode, a large amount of refrigerant flows through the pipe line to reduce pressure loss.

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Patent Owner(s)

Patent OwnerAddressTotal Patents
KABUSHIKI KAISHA SAGINOMIYA SEISAKUSHOTOKYO54

International Classification(s)

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  • [Patents Count]

Inventor(s)

Inventor Name Address # of filed Patents Total Citations
Fukuyasu, Tamami - 2 2
Hayashi, Takahito - 6 5
Hirakawa, Takashi Kanagawa, JP 56 70
Kaneko, Yutaka Mitaka, JP 144 1098
Sekiguchi, Hideki Kanagawa, JP 46 166

Cited Art Landscape

Patent Info (Count) # Cites Year
 
Kabushiki Kaisha Saginomiya Seisakusho (3)
4,372,486 Reversible expansion valve 12 1981
7,854,390 Expansion valve, heat pump type refrigeration cycle apparatus, and air handling unit 2 2008
2009/0293,520 EXPANSION VALVE, HEAT PUMP TYPE REFRIGERATION CYCLE APPARATUS, AND AIR HANDLING UNIT 1 2009
 
DANFOSS A/S (1)
6,354,510 Expansion valve housing 7 2001

Patent Citation Ranking

Forward Cite Landscape

Patent Info (Count) # Cites Year
 
DUNAN MICROSTAQ, INC. (1)
8,540,207 Fluid flow control assembly 0 2009

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