AIR CONDITIONER

WIPO Patent Application WO/2015/145714

A1

The objective of the present invention is to properly estimate the frosted state of a heat exchanger even when the rotational frequency of a fan changes when estimating frost during a heating operation, and even when the characteristic is such that the current value does not correspond to the fan rotational frequency, as with constant-torque control of the fan motor. Therefore, this air conditioner is equipped with: an outdoor heat exchanger that exchanges heat between the air and a refrigerant flowing in the interior of this heat exchanger; an outdoor fan that blows air into the outdoor heat exchanger; an outdoor fan motor that rotationally drives the outdoor fan; an outdoor fan inverter that supplies a desired current to the outdoor fan motor; a current detector that detects the current flowing in the outdoor fan motor; and a control unit that controls the outdoor fan inverter such that the rotational frequency of the outdoor fan motor reaches a target rotational frequency. The control unit starts a defrosting operation of the outdoor heat exchanger on the basis of a detection value from the current detector during the heating operation.

JP3969701	AIR CONDITIONING EQUIPMENT MANAGEMENT DEVICE
JPH02118354	AIR HANDLING UNIT OPERATION CONTROL DEVICE
JP2000353555	MOUNTING STRUCTURE FOR TERMINAL BLOCK

NAITO KOJI (JP)
URATA KAZUMOTO (JP)
TANI KAZUHIKO (JP)
KANEKO HIROAKI (JP)
TOKUDI MIKIHITO (JP)
KASAHARA REI (JP)

PCT/JP2014/059074

October 01, 2015

March 28, 2014

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HITACHI APPLIANCES INC (JP)

F24F11/02; F25B47/02

JP2010223494A	2010-10-07
JP2003269772A	2003-09-25
JP2003050066A	2003-02-21
JP2012193915A	2012-10-11
JP2014019179A	2014-02-03
JPS6446530A	1989-02-21
JP2004325017A	2004-11-18

INOUE Manabu et al. (JP)
Manabu Inoue (JP)

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