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:
Aug. 07, 2018
Filed:
Jan. 22, 2014
Fujitsu General Limited, Kanagawa, JP;
Takashi Kimura, Kanagawa, JP;
Kuniko Hayashi, Wakayama, JP;
FUJITSU GENERAL LIMITED, Tokyo, JP;
Abstract
A rotational speed Cr of a compressorduring a defrosting operation is controlled within a control range that corresponds to a capacity ratio P, a total sum Pi of rated capacity of an indoor unit, or a refrigerant pipe length Lr. Accordingly, even in the case where a refrigerant circulation amount during the defrosting operation is reduced due to an installation state of an air conditioner, it is possible to prevent suction pressure from being significantly reduced and falling below a performance lower limit value of the compressor. Thus, damage to the compressorcan be prevented. In addition, it is possible to prevent a case where the suction pressure falls below the performance lower limit value of the compressorand thus low-pressure protection control is executed. Therefore, a case where the restoration of the heating operation is delayed does not occur.