Sealed-type electric compressor having refrigerant passage
AssigneeDenso Corporation
InventorsYoshiaki Harakawa, Yoshitaka Akiyama, Masami Sanuki
Life of this patent
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Abstract
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.
Claims2
An electric compressor to compress refrigerant comprising:
- a housing forming an outer casing;
- a compression mechanism provided in said housing for suctioning and compressing the refrigerant;
- an electric motor driving said compression mechanism, said electric motor including a stator, a rotor rotating inside said stator, and a rotor shaft, said rotor shaft defining an end surface thereof;
- a motor chamber provided in said housing, where said electric motor is installed;
- a suction port introducing the refrigerant into said housing, said suction port facing the end surface of said rotor shaft;
- and
- a refrigerant passage provided in said rotor shaft for guiding the refrigerant suctioned through said suction port to said compression mechanism, said refrigerant passage including a first refrigerant passage extending in parallel with said rotor shaft from the end surface of said rotor shaft, and a second refrigerant passage communicating with said first refrigerant passage and extending radially outwardly, wherein
- said second refrigerant passage is located between the end surface of said rotor shaft and said rotor.
Dependencies are inferred from the claim text.