The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 09, 2013
Filed:
Dec. 03, 2009
Satoshi Tomioka, Kawasaki, JP;
Hideya Tamura, Kawasaki, JP;
Tetsuya Ito, Kawasaki, JP;
Takahiro Matsunaga, Kawasaki, JP;
Takamitsu Kurokawa, Kawasaki, JP;
Shintaro Sanada, Kawasaki, JP;
Satoshi Tomioka, Kawasaki, JP;
Hideya Tamura, Kawasaki, JP;
Tetsuya Ito, Kawasaki, JP;
Takahiro Matsunaga, Kawasaki, JP;
Takamitsu Kurokawa, Kawasaki, JP;
Shintaro Sanada, Kawasaki, JP;
Fujitsu General Limited, Kawasaki-Shi, JP;
Abstract
There is provided a refrigeration apparatus in which a refrigerant accumulating in non-operating outdoor units is supplied to an outdoor unit being operated in which a shortage of refrigerant occurs without starting the compressors of the non-operating outdoor units. In the control method for the refrigeration apparatus in which to refrigerant pipinginstalled between the indoor side and the outdoor side, a plurality of outdoor unitsA,B each including a compressor, a directional control valve, an outdoor heat exchanger, an outdoor expansion valve, and an accumulatorare connected in parallel on the outdoor side, and each of the outdoor units is provided with a hot gas bypass circuitthat includes a solenoid valveand an expansion mechanismarranged in series, and is connected between high-pressure side pipingon the discharge side of the compressor and low-pressure side pipingon the accumulator side, if a shortage of refrigerant occurs when air cooling operation is performed in a state in which only the outdoor unitA is operated and other outdoor unitsB are not operated, the solenoid valvesof the non-operating outdoor unitsB are opened so that the refrigerant accumulating in the non-operating outdoor unitsB is supplied to the outdoor unitA via the hot gas bypass circuitand the low-pressure piping