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Patent Searching and Data


Title:
AIR CONDITIONER
Document Type and Number:
WIPO Patent Application WO/2017/168681
Kind Code:
A1
Abstract:
Provided is an air-conditioner provided with a heat source unit, a plurality of indoor units, a relay unit, a state detector, and a control unit. The relay unit has: a plurality of cooling electromagnetic valves connected in parallel to each other, the cooler electromagnetic valves having one end connected to a gas branch pipe and the other end connected to a first connection pipe, and being opened during a cooling operation and closed during a heating operation; and a heating electromagnetic valve having one end connected to a gas branch pipe and the other end connected to a second connection pipe, and being opened during a heating operation and closed during a cooling operation. The control unit has: a valve control means for controlling the opening/closing of the plurality of cooling electromagnetic valves; a determining means for determining whether or not a flow sound will be generated on the basis of the state of a refrigerant detected by the state detector when the refrigerant is channeled through the cooling electromagnetic valves; and a timing control means for controlling the valve control means so as to open one of the plurality of cooling electromagnetic valves when the indoor unit is switched from a heating operation to a cooling operation, and controlling the valve control means so as to open one of the closed cooling electromagnetic valves when the determining means determines that a refrigerant flow sound will be generated.

Inventors:
AZUMA, Koji (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
MORIMOTO, Osamu (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
TAKAHASHI, Hiroki (1-13-5 Kudankita, Chiyoda-k, Tokyo 73, 〒1020073, JP)
Application Number:
JP2016/060673
Publication Date:
October 05, 2017
Filing Date:
March 31, 2016
Export Citation:
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Assignee:
MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
F25B1/00; F24F11/02; F25B13/00
Attorney, Agent or Firm:
KISA PATENT & TRADEMARK FIRM (East 8F, TORANOMON TWIN BLDG. 10-1 Toranomon 2-chome, Minato-k, Tokyo 01, 〒1050001, JP)
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