Search International and National Patent Collections

1. (WO2018025345) AIR CONDITIONING DEVICE

Pub. No.:    WO/2018/025345    International Application No.:    PCT/JP2016/072768
Publication Date: Fri Feb 09 00:59:59 CET 2018 International Filing Date: Thu Aug 04 01:59:59 CEST 2016
IPC: F24F 11/02
F25B 1/00
Applicants: MITSUBISHI ELECTRIC CORPORATION
三菱電機株式会社
Inventors: TOYODOME, Shinya
豊留 慎也
ARISAWA, Koichi
有澤 浩一
UMEHARA, Shigeo
梅原 成雄
Title: AIR CONDITIONING DEVICE
Abstract:
This air conditioning device circulates refrigerant through, in order, a compressor, a first heat exchanger, an expansion valve, and a second heat exchanger. The compressor has a motor that includes a first stator coil and a second stator coil. The air conditioning device comprises a first inverter, a second inverter, and a control unit. In a situation in which the first inverter has failed, the control unit is configured to stop the first inverter. When the motor speed is higher than a reference speed in a situation in which the first inverter has failed, the control unit is configured so as to control the second inverter so that the motor speed is reduced to the reference speed or lower. When the motor speed is lower than the reference speed in a situation in which the first inverter has failed, the control unit is configured so as to control the second inverter so that the motor speed is maintained.