Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Osamu Kanaya

Yasuhiro Suzuki

Hiroshi Nakashima

Mizuo Sakai

Ryo Oya

Masanori Aoki

Taro Hattori

Atsushi Edayoshi

Eiji Fukushima

A control unit is configured to set a rotation speed of a compressor to be lower than that in a defrosting operation and set an opening degree of a pressure reducing device to be equal to or greater than that in the defrosting operation during a first control time after completion of the defrosting operation, stop the compressor and set the opening degree of the pressure reducing device to be less than that in the first control time during a second control time after lapse of the first control time, and control a refrigerant circuit switching device to resume a heating operation after lapse of the second control time.

Air-conditioning apparatus

An air-conditioning apparatus includes a temperature sensor for detecting a heat exchanger temperature or an inlet air temperature, a controller that performs variable control of the direction of the indoor unit air blow vane or the air flow speed or rate of the blower fan, and a remote controller that remote-controls indoor unit operation, wherein temperatures set via the remote controller are divided into two set temperature ranges and during heating operation the controller sets at least the air blow vane to a horizontal or downward direction on the basis of the two set temperature ranges and the heat exchanger temperature or the inlet air temperature.

Air conditioning apparatus with a controller that utilizes two set temperature ranges

To provide an air conditioner capable of operating devices in an outdoor unit by connecting an indoor unit, which is capable of transmitting operational commands and operational modes using simple ON/OFF signals to the outdoor unit, even if the indoor unit does not have transmission means for transmitting and receiving information between the outdoor unit, or the indoor unit has transmission means with a different data transmission protocol from the outdoor unit. When it is determined that only ON/OFF signals of operational commands and operation modes have been transmitted, the devices disposed inside the outdoor unit are independently controlled based on the ON/OFF signals.

Outdoor unit of air conditioner and controlling method for the same

The present invention aims at obtaining a ceiling built-in type air conditioner in which noise attributable to the breakaway flow of air at the front ends of the fins is decreased. For this purpose, the ceiling built-in type air conditioner has a heat exchanger 4 installed within a main body cabinet 1 having an air suction inlet 2 and an air blowing outlet 3 and has a centrifugal blower 7 installed in the air suction inlet 2. In this ceiling built-in type air conditioner, a flat-plate-shaped rectifying member 9 is placed near the middle point between the center of the air suction inlet 2 and the center of the heat exchanger 4 and is placed substantially at a right angle to the direction of the flow of air from the air suction inlet 2.

Growing community of inventors

Tokyo, Japan

Osamu Kanaya