Mitsubishi Denki Kabushiki Kaisha

Tatsuo Ono

Tomohiko Kasai

Kenji Kawaguchi

Takashi Nakamura

Masaharu Moriyasu

Michio Fujiwara

Youichi Hisamori

Mitsunori Kurachi

Hirofumi Kouge

Masahiko Sugino

An air conditioning system of the present invention has a refrigerant circuit including a compressor, an oil separator, a condenser, a expansion device, an evaporator, a first accumulator, and a second accumulator which are connected in order by piping, said evaporator, said first accumulator, said second accumulator, and said compressor being connected in series; a first oil return bypass for connecting said oil separator and a connection pipe between said first and second accumulators; and a second oil return bypass for connecting said first accumulator and a connection pipe between said second accumulator and said compressor.

Air conditioning system, and accumulator therefor and manufacturing

An air conditioner in which, when a first compressor is being operated and a second compressor is being stopped, liquid refrigerant does not flow into the second compressor even in a state of wet vapor suction, a decrease in lubricating oil in the second compressor or a decline in its concentration are not experienced, and breakage of the second compressor does not occur owing to faulty lubrication when the second compressor is started. In addition, to obtain an air conditioner which does not lapse into a wasteful shortage of cooling and heating capabilities when the air conditioner is not in the state of wet vapor suction, by reliably detecting the presence or absence of the state of wet vapor suction. In the air conditioner, the first compressor and the second compressor are connected together by an equalizing pipe. A bypass passage which connects together a discharge pipe and a suction pipe of the second compressor is provided.

Air conditioner

Growing community of inventors

Wakayama, Japan

Tatsuo Ono