Title:
AIR CONDITIONING DEVICE
Document Type and Number:
WIPO Patent Application WO/2023/223539
Kind Code:
A1
Abstract:
This air conditioning device comprises a heat source machine including a compressor, a flow passage switching valve, and a heat source side heat exchanger, one or more indoor units which include a load side flow rate adjusting valve and a load side heat exchanger, and which carry out a space cooling operation or a space heating operation, and a relay unit which is connected to the heat source machine by means of a gas main pipe through which a gas refrigerant flows when the space cooling operation and the space heating operation are carried out, and a liquid main pipe through which a liquid refrigerant or a gas-liquid two-phase refrigerant flows when the space cooling operation and the space heating operation are carried out, the relay unit being connected to each of the one or more indoor units by means of a gas branch pipe and a liquid branch pipe, and supplying a refrigerant supplied from the heat source machine to the one or more indoor machines, wherein: the relay unit comprises a gas-liquid separator for separating the refrigerant into the gas refrigerant and the liquid refrigerant, and one or more flow passage opening and closing devices for respectively opening and closing a refrigerant flow passage from the heat source machine toward the one or more indoor units and a refrigerant flow passage from the one or more indoor units toward the heat source machine; and the relay unit includes a refrigerant route through which, when the space heating operation is being carried out, the refrigerant flowing from the heat source machine through the gas main pipe into the relay unit flows into the one or more flow passage opening and closing devices without passing through the gas-liquid separator.
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Inventors:
OGATA KEITO (JP)
TAKENAKA NAOFUMI (JP)
HATOMURA TAKESHI (JP)
MIYAWAKI KOSUKE (JP)
NISHIO JUN (JP)
OKANO HIROYUKI (JP)
KOIKE TAKANORI (JP)
TAKENAKA NAOFUMI (JP)
HATOMURA TAKESHI (JP)
MIYAWAKI KOSUKE (JP)
NISHIO JUN (JP)
OKANO HIROYUKI (JP)
KOIKE TAKANORI (JP)
Application Number:
PCT/JP2022/020941
Publication Date:
November 23, 2023
Filing Date:
May 20, 2022
Export Citation:
Assignee:
MITSUBISHI ELECTRIC CORP (JP)
International Classes:
F25B13/00; F25B6/02; F25B43/00
Domestic Patent References:
| WO2015177896A1 | 2015-11-26 | |||
| WO2013111176A1 | 2013-08-01 |
Foreign References:
| JP2014129976A | 2014-07-10 | |||
| JP2011033289A | 2011-02-17 | |||
| JPS56102658A | 1981-08-17 |
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (JP)
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