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Patent Searching and Data

Document Type and Number:
WIPO Patent Application WO/2017/221300
Kind Code:
This air conditioner is provided with: a compressor which compresses a refrigerant including freezer oil; a condenser which condenses the compressed refrigerant; an expansion valve which reduces the pressure of the condensed refrigerant to cause expansion thereof; an evaporator which evaporates the expanded refrigerant; an accumulator which is disposed on an intake side of the compressor so as to store an excess portion of the evaporated refrigerant; a return oil circuit which has a discharge pipe, one end of which is connected to a lateral surface of the accumulator, while the other end is connected to the intake side of the compressor, which also has a flow rate regulating valve disposed in the discharge pipe so as to regulate the flow rate of the freezer oil to be discharged from the accumulator, and which returns freezer oil included in the excess refrigerant being stored in the accumulator; and a control device which controls the flow rate regulating valve in the return oil circuit so as to cause the freezer oil to be returned from the accumulator to the compressor when start-up takes place in heater operation mode, and which controls the compression frequency for the compressor in accordance with the oil quantity of the freezer oil within the compressor and the oil quantity of the freezer oil being returned from the accumulator.

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WADA, Makoto (7-3 Marunouchi 2-chome, Chiyoda-k, Tokyo 10, 〒1008310, JP)
Application Number:
Publication Date:
December 28, 2017
Filing Date:
June 20, 2016
Export Citation:
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MITSUBISHI ELECTRIC CORPORATION (7-3 Marunouchi 2-chome, Chiyoda-ku Tokyo, 10, 〒1008310, JP)
International Classes:
F25B1/00; F24F11/02
Foreign References:
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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