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:
Dec. 06, 2011
Filed:
Mar. 19, 2007
Manabu Yoshimi, Osaka, JP;
Tadafumi Nishimura, Osaka, JP;
Manabu Yoshimi, Osaka, JP;
Tadafumi Nishimura, Osaka, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
An air conditioner performs a refrigerant quantity judging operation to judge the refrigerant quantity in a refrigerant circuit, and includes a heat source unit, utilization units, expansion mechanisms, a first refrigerant gas pipe, a second refrigerant gas pipe, a refrigerant liquid pipe, switching mechanisms, a temperature detector, and a controller. The heat source unit includes a compressor and a heat source side heat exchanger. The first refrigerant gas pipe is connected to the discharge side of the compressor. The switching mechanism can switch between a first state and a second state. The temperature detector is mounted on the first refrigerant gas pipe, and configured to detect a refrigerant temperature on the first refrigerant gas pipe side and output a refrigerant temperature detection value. The controller corrects the refrigerant quantity judged by a refrigerant quantity judging operation based on the refrigerant temperature detection value.