AIR CONDITIONING DEVICE - MITSUBISHI ELECTRIC CORP

Title:

AIR CONDITIONING DEVICE

Document Type and Number:

WIPO Patent Application WO/2013/179334

Kind Code:

A1

Abstract:

An air conditioning device can simultaneously perform both cooling and heating operation in which a heat source-side unit and load-side units are connected, the load-side units being connected to the heat source-side unit so as to be parallel to each other. An opening/closing valve (7) and a heat source-side flow restriction device (6), which is provided parallel to the opening/closing valve, are provided in flow passages through which a refrigerant passing from the load-side units to the outdoor heat exchanger of the heat source-side unit flows. In an operation mode in which a heating load is dominant, under the condition in which the liquid pipe temperature of a load-side unit which is performing a cooling operation is in a temperature range in which freezing prevention control is performed, the opening/closing valve (7) is closed and the degree of opening of the heat source-side flow restriction device (6) is controlled, and as a result, the freezing of the load-side unit is prevented.

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Inventors:

OKANO HIROYUKI (JP)
KOGE HIROFUMI (JP)

Application Number:

PCT/JP2012/003515

Publication Date:

December 05, 2013

Filing Date:

May 30, 2012

Export Citation:

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Assignee:

MITSUBISHI ELECTRIC CORP (JP)
OKANO HIROYUKI (JP)
KOGE HIROFUMI (JP)

International Classes:

F25B29/00; F24F11/02

Domestic Patent References:

WO2010128557A1	2010-11-11
WO2011074028A1	2011-06-23

Foreign References:

JPH05215437A	1993-08-24
JPH02223757A	1990-09-06
JPH0473559A	1992-03-09
JP2005344995A	2005-12-15

Other References: