Hitachi-johnson Controls Air Conditioning, Inc.

Shoutaro Yamamoto

Hiroaki Kaneko

Koji Naito

Atsuhiko Yokozeki

Kazuhiko Tani

Shuntaro Inoue

Hayato Mori

Kazuhito Sekiba

Katsuaki Nagahashi

An air-conditioning device including multiple outdoor units and an indoor unit through a pipe includes a control section that obtains a degree of subcooling at an outlet of a subcooling circuit of each outdoor unit based on a temperature detected by a temperature sensor that detects the temperature of refrigerant having passed through the subcooling circuit of each outdoor unit, obtain a target value of the degree of subcooling based on the obtained multiple degrees of subcooling, and perform the control of increasing the rotation speed of a compressor of an outdoor unit having a higher degree of subcooling than the target value and decreasing the rotation speed of a compressor of an outdoor unit having a lower degree of subcooling than the target value such that a difference in the degree of subcooling at the outlet of the subcooling circuit of each outdoor unit is decreased.

Air-conditioning device

To achieve higher efficiency at a low-load region and to enable power saving throughout a year. The refrigeration cycle apparatusincludes a compressorthat has a flow in/out portthrough which a refrigerant is capable of flowing out and flowing in, in fluid communication with a compression room; pipesdisposed at a suction side of the compressor; a pipeconnected to the flow in/out portof the compressor; a pipethat has one end connected to the pipeand an opposite end connected to the pipe; and a second solenoid valvefor opening and closing a fluid passage of the pipe

Refrigeration cycle apparatus

A refrigeration and air conditioning device, which is an outdoor unit of a refrigeration and air conditioning device provided with a heat exchanger within a housing () and blowers () arranged on the housing, the housing () being provided with a side cover covering the sides, a base () covering the bottom and a foot portion () arranged below the base (), the foot portion () being provided with a raised portion () upwardly bending an end face () of a lower surface of the foot portion. The refrigeration and air conditioning device increases rigidity without increasing costs.

Refrigeration and air conditioning device

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Tokyo, Japan

Shoutaro Yamamoto