Title:
AIR CONDITIONER AND CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2022/059053
Kind Code:
A1
Abstract:
The air conditioner according to an embodiment of the present invention has a plurality of outdoor units, at least one indoor unit, and a control unit. The plurality of outdoor units are connected in parallel to the same refrigerant piping system, and each have an outdoor expansion valve, an outdoor heat exchanger, a four-way valve, a compressor, a discharge pressure sensor that detects the pressure of the refrigerant discharged from the compressor, and a suction pressure sensor that detects the pressure of the refrigerant sucked into the compressor. The at least one indoor unit is connected to the refrigerant piping system and has an indoor heat exchanger, an indoor expansion valve that adjusts the amount of refrigerant flowing into the indoor heat exchanger, and an indoor blower. In a case where at least one of the plurality of outdoor units performs heating operation and at least one of the plurality of outdoor units performs defrosting operation for removing frost adhering to the outdoor heat exchanger, the control unit changes the rotational speed of the compressor according to at least one of the suction pressure of the refrigerant sucked into the compressor of the outdoor unit that performs defrosting operation and the discharge pressure of the refrigerant discharged from the compressor.
Inventors:
IUCHI AKIRA (JP)
MIURA KEN (JP)
MIURA KEN (JP)
Application Number:
PCT/JP2020/034830
Publication Date:
March 24, 2022
Filing Date:
September 15, 2020
Export Citation:
Assignee:
TOSHIBA CARRIER CORP (JP)
International Classes:
F24F11/41; F24F11/42; F24F140/20
Domestic Patent References:
| WO2018016000A1 | 2018-01-25 |
Foreign References:
| JP2015034657A | 2015-02-19 | |||
| JP2014040953A | 2014-03-06 | |||
| JP2003254589A | 2003-09-10 | |||
| JP2014145505A | 2014-08-14 | |||
| JP2008157558A | 2008-07-10 | |||
| JP4440883B2 | 2010-03-24 | |||
| JP2013087973A | 2013-05-13 |
Attorney, Agent or Firm:
SHIGA INTERNATIONAL PATENT OFFICE (JP)
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