US 9,175,890 B2 · Outdoor unit for air-conditioning apparatus, and air-conditioning apparatus

Abstract

An outdoor unit for an air-conditioning apparatus includes: a compressor; an outdoor fan; a plurality of outdoor heat exchangers coupled to a plurality of indoor units; a switching member configured to switch functions of the outdoor heat exchangers to either condensers or evaporators by switching of coupling states between the compressor and the outdoor heat exchangers; and a control unit configured to calculate a low pressure saturation temperature during a cooling operation or a cooling-main operation, and configured to cause all of the plurality of outdoor heat exchangers to serve as condensers by controlling the switching member when a state in which an open-air temperature is lower than the low pressure saturation temperature continues for a predetermined time.

Claims8

Dependent claims

An outdoor unit for an air-conditioning apparatus, comprising:

a compressor;
an outdoor fan;
a plurality of outdoor heat exchangers coupled to a plurality of indoor units;
a switching member configured to switch functions of the outdoor heat exchangers to either condensers or evaporators by switching of coupling states between the compressor and the outdoor heat exchangers;
and
a control unit configured to calculate a low pressure saturation temperature during a cooling operation or a cooling-main operation, and configured to cause all of the plurality of outdoor heat exchangers to serve as condensers by controlling the switching member when a state in which an open-air temperature is lower than the low pressure saturation temperature continues for a predetermined time.

3 more elements

Dependencies are inferred from the claim text.

Facts

Application

13/933,608Filed 2 Jul 2013

Priority

JP 2012-1537629 Jul 2012

Published

US 2014/0007601 A19 Jan 2014

Granted

3 Nov 2015

Term ends

Not estimatedThe source records don’t support an estimate.

Classification12 codes

F25B 29/003
Combined heating and refrigeration systems, e.g. operating alternately or simultaneously: of the compression type system
F24F 1/20
Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger: electric components for…
F24F 1/46
Separate outdoor units, e.g. outdoor unit to be linked to a separate room comprising a compressor and a heat exchanger: component arrangements in…
F24F 11/30
Control or safety arrangements: for purposes related to the operation of the system, e.g. for safety or monitoring

Outdoor unit for air-conditioning apparatus, and air-conditioning apparatus

Life of this patent

Outdoor unit for air-conditioning apparatus, and air-conditioning apparatus

Life of this patent

Abstract

Claims8