US 12,188,678 B2
Air conditioner and control method
Ken Miura, Fuji (JP); Tetsuma Hamashima, Fuji (JP); and Katsuhiro Shimizu, Fuji (JP)
Assigned to Carrier Japan Corporation, Tokyo (JP)
Filed by Carrier Japan Corporation, Tokyo (JP)
Filed on Mar. 15, 2022, as Appl. No. 17/695,326.
Application 17/695,326 is a continuation of application No. PCT/JP2019/036328, filed on Sep. 17, 2019.
Prior Publication US 2022/0205675 A1, Jun. 30, 2022
Int. Cl. F24F 11/89 (2018.01); F24F 3/06 (2006.01); F24F 11/42 (2018.01); F25B 5/02 (2006.01); F25B 47/02 (2006.01); F24F 140/12 (2018.01)
CPC F24F 11/89 (2018.01) [F24F 3/065 (2013.01); F24F 11/42 (2018.01); F25B 5/02 (2013.01); F25B 47/025 (2013.01); F24F 2140/12 (2018.01); F25B 2313/0233 (2013.01); F25B 2313/0253 (2013.01); F25B 2700/1931 (2013.01); F25B 2700/1933 (2013.01)] 9 Claims
OG exemplary drawing
 
1. An air conditioner comprising:
a plurality of outdoor units each including a compressor, a four-way valve, an outdoor heat exchanger, an outdoor expansion valve, and an outdoor blower, each outdoor unit exchanging heat between outdoor air and a refrigerant;
one or more indoor units each being connected to the plurality of outdoor units by a refrigerant pipe, including an indoor heat exchanger, an indoor expansion valve, and an indoor blower, each indoor unit exchanging heat between indoor air and the refrigerant; and
a control unit that controls the plurality of outdoor units and the one or more indoor units, wherein
the control unit controls condensation pressure of one or more outdoor units that are in a heating operation among the plurality of the outdoor units and suction pressure of one or more outdoor units that are in a defrosting operation among the plurality of the outdoor units such that they are equal to or smaller than an upper limit pressure which is two thirds times the rated maximum pressure.