Title:
AIR CONDITIONER
Document Type and Number:
Japanese Patent JP2010175189
Kind Code:
A
Abstract:
To more efficiently perform a refrigerating cycle operation while properly returning a refrigerating machine oil to a compressor.
A control section 91 closes a solenoid valve 53 of an oil return circuit 55 (S7), in a case when a driving frequency of the compressor 40 detected by a frequency sensor 78 is smaller than a predetermined rotational frequency, and temperature load calculated by a temperature load calculating section 92 is smaller than a predetermined value (YES in S4). Further the control section 91 opens the solenoid valve 53 of the oil return circuit 55 (S9), when the rotational frequency of the compressor 40 is the predetermined rotational frequency or more, or the temperature load is the predetermined value or more (NO in S4).
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Inventors:
TAKAYAMA TOSHIHIKO
SAITO TADASHI
OKUDA NORIYUKI
SAITO TADASHI
OKUDA NORIYUKI
Application Number:
JP2009020040A
Publication Date:
August 12, 2010
Filing Date:
January 30, 2009
Export Citation:
Assignee:
DAIKIN IND LTD
International Classes:
F25B1/00; F25B41/04
Domestic Patent References:
| JPH03115358U | 1991-11-28 | |||
| JP2003240365A | 2003-08-27 | |||
| JPH0473565A | 1992-03-09 |
Attorney, Agent or Firm:
Etsushi Kotani
Masataka Otani
Tanaka rice
Masataka Otani
Tanaka rice