Denso Corporation

Yoshiaki Harakawa

Masami Sanuki

Yuichi Tsumagari

Yoshitaka Akiyama

Kenji Iriyama

A refrigerant passage within a main shaft includes an axial refrigerant passage extending in parallel with the main shaft from the end surface thereof, and a radial refrigerant passage communicating with the axial refrigerant passage and extending radially outwardly. The radial refrigerant passage is located between the end surface of the main shaft and a motor rotor. Thus, when the main shaft rotates, suctioned refrigerant is uniformly sprayed toward an entire coil. Further, the refrigerant flows toward a compression mechanism through the electric motor, thereby cooling the electric motor effectively.

Sealed-type electric compressor having refrigerant passage

Refrigerant passages in a compressor include an upper refrigerant passage and a lower refrigerant passage. The upper refrigerant passage is positioned above a datum line extending through a center of a rotor shaft of a compressor motor and perpendicularly to the rotor shaft, and the lower refrigerant passage is positioned below the datum line. A cross-sectional area of the upper refrigerant passage is larger than that of the lower refrigerant passage. Thus, even when lubricating-oil blocks the lower refrigerant passage, the refrigerant flows through the upper refrigerant passage, thereby reducing the pressure loss of the refrigerant, and preventing the lubricating oil from being caught in the refrigerant and discharged with the refrigerant from the compressor.

Growing community of inventors

Handa, Japan

Yoshiaki Harakawa