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Title:
AIR CONDITIONER
Document Type and Number:
Japanese Patent JP2015129600
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To obtain an air conditioner capable of identifying a cause of stop of a compressor.SOLUTION: The air conditioner includes an inverter circuit 10, a control unit 2 for controlling the inverter circuit 10, a compressor 11 having a protection unit (pressure switch 9), and a phase voltage detection circuit (U phase detection circuit 6) for detecting a voltage of one of the three-phase windings (compressor windings 8U to 8W) of the compressor 11. The control unit 2 includes a cause of stop identifying unit 2a which, after the compressor 11 has stopped, turns on one of switching elements 1Up to 1Wn constituting the inverter circuit 10, determines presence or absence of operation of the protection unit on the basis of a phase voltage detected by the phase voltage detection circuit, and identifies the cause of stop of the compressor 11.

Inventors:
SUGISAKI NORIHIKO
ITO NORIKAZU
Application Number:
JP2014001026A
Publication Date:
July 16, 2015
Filing Date:
January 07, 2014
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORP
International Classes:
F25B49/02; F04B49/10; H02P25/04; H02P27/06
Domestic Patent References:
JP2001140766A2001-05-22
JP2007318824A2007-12-06
JP2006169962A2006-06-29
Attorney, Agent or Firm:
Hiroaki Sakai