Daikin Industries, Ltd.

Masakazu Hirai

Haruo Nakata

Tsunehisa Sanagi

Kazushige Maeda

Hironori Iwanaga

Osamu Tanaka

Toru Iwata

Ryuusuke Fujiyoshi

A drain pump is provided that reduces the operating noise when the head is low. The drain pump has a pump casing, and an impeller. The pump casing has a drain inlet for sucking in drain water at a lower end part and a drain outlet for discharging drain water at a side part. The impeller has a shaft part disposed extending in a vertical direction inside the pump casing, a main blade disposed on the outer circumferential side of the shaft part, an auxiliary blade disposed on the lower side of the main blade, and a disc shaped dish part disposed between the main blade and the auxiliary blade. The dish part has an annular partition part extending upward from the outer circumferential edge part of the main blade, which is disposed at a position lower than the upper end part of the partition part.

Drain pump, and air conditioner provided therewith

The present invention provides an air conditioning system that can appropriately adjust humidity. The air conditioning system is an air conditioning system that comprises a plurality of indoor units that jointly air conditions a same space, comprising a first indoor unit and a second indoor unit. The first indoor unit comprises a first indoor heat exchanger that adjusts the temperature in the space. The second indoor unit comprises a second indoor heat exchanger and a humidifying element. The second indoor heat exchanger adjusts the temperature in the space. The humidifying element adjusts the humidity in the space. Further, the air conditioning system, during humidity adjustment, adjusts the humidity in the space by the humidifying element with greater priority than adjusting the temperature in the space by the second indoor heat exchanger.

Air conditioning system

A drain pump is provided that reduces the operating noise when the head is low. The drain pump has a pump casing, and an impeller. The pump casing has a drain inlet for sucking in drain water at a lower end part and a drain outlet for discharging drain water at a side part. The impeller has a shaft part extending in a vertical direction inside the pump casing, a main blade disposed on the outer circumferential side of the shaft part, an auxiliary blade disposed on the lower side of the main blade, and a disc shaped dish part disposed between the main blade and the auxiliary blade. The dish part has an annular partition part extending upward from the outer circumferential edge part of the main blade, which is disposed at a position lower than the upper end part of the partition part.

An air discharge outlet comprises line air discharge outlets () and corner air discharge outlets (). The line air discharge outlets () are so formed as to extend, respectively, along four sides of a casing bottom part having four side parts and four corner parts wherein the side and corner parts are formed in contiguous relationship to one another. The corner air discharge outlets () are formed, respectively, in the four casing corner parts so that each corner air discharge outlet () establishes connection between adjacent ones of the line air discharge outlets (). And, each line air discharge outlet () is provided with a swing vane () swingable about a longitudinal shaft () of each line air discharge outlet (). Each corner air discharge outlet () is provided with a fixed stationary vane ().

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Osaka, Japan

Masakazu Hirai