Mitsubishi Electric Corporation

Yuki Mochizuki

Takashi Ikeda

Kimitaka Kadowaki

Kazuhiko Kawai

Yusuke Koyama

Akinori Kurachi

Shohei Takenaka

Ippei Shinoda

Satoshi Kusutani

Yuichi Yata

An air-conditioning apparatus prevents a compressor from not starting for a long time when an actual air conditioning load is low or when exhaust heat from heat-generating devices in an air-conditioned indoor space is not returned to an indoor unit, and reduces the number of times the compressor is started and stopped. The air-conditioning apparatus includes a refrigerant circuit sequentially annularly connecting the compressor, a heat source-side heat exchanger, an expansion valve, and a use-side heat exchanger, a blowing temperature sensor detecting a blowing temperature of air brown into the air-conditioned indoor space after passing through the use-side heat exchanger in the indoor unit including the use-side heat exchanger, and a compressor control unit performing thermo-on and thermo-off controls to start and stop the compressor, to approximate the blowing temperature detected by the blowing temperature sensor to a preset temperature. A time for which the next thermo-on control is prohibited is set based on an air-conditioning operation state immediately preceding the thermo-off control or during thermo-off time.

Air-conditioning apparatus

An indoor unit of an air-conditioning apparatus includes a body casing having an air inlet formed in an upper portion of the body casing and an air outlet formed in a lower portion of the body casing; a ventilation passage formed in the body casing; an evaporator provided to a refrigerant circuit, disposed in an inclined manner in the ventilation passage, and covering the ventilation passage such that air freely passes; a main drain pan disposed below the evaporator; and a fan disposed in the ventilation passage. The evaporator is divided into an upper heat exchanger and a lower heat exchanger. A sub-drain pan that receives dew condensation water coming out from a gap of the joint is disposed at a downstream side in a ventilation direction of a joint between the upper heat exchanger and the lower heat exchanger.

Indoor unit of air-conditioning apparatus

Growing community of inventors

Tokyo, Japan

Yuki Mochizuki