Electric compressor with the stator coils coated with resin, the resin having openings exposing the coils to the interior of the housing

摘要

An electric compressor includes a housing, an electric motor, a compression mechanism, and a resin molding. The electric motor includes a coil having coil ends projecting from each of two end surfaces of the stator. Refrigerant flows through the housing that accommodates the electric motor. The resin molding covers each coil end and includes an opening that exposes part of the coil end to the interior of the housing.

主权项

1. An electric compressor comprising:
a housing; an electric motor accommodated in an interior of the housing, wherein the electric motor includes rotary shaft, a rotor fixed to the rotary shaft, a stator fixed to the housing, and a coil wound around the stator, the coil includes a plurality of coil ends respectively projecting from each of two end surfaces of a stator core of the stator, and refrigerant flows through the interior of the housing that accommodates the electric motor; a compression mechanism accommodated in the housing, coupled to the rotary shaft, and driven by the electric motor; and a resin molding that covers and seals at least one of the coil ends in a lower side of the stator as viewed in a gravitational state in which the compressor is set, resin molding formed in contact with and extending from the end surfaces of the stator core, wherein the resin molding includes an opening in an upper side of the resin molding as viewed in the gravitational state so that the opening exposes others of the plurality of coil ends to the interior of the housing, wherein the compressor is configured such that when the compressor stops operating, the resin molded at least one coil ends located at the lower side of the stator becomes immersed in refrigerant and the at least one of the coil ends remains out of contract with the refrigerant, and when the electric compressor commences operation, the others of the plurality of coil ends located at the upper side of the stator that are exposed through the opening are cooled by circulating refrigerant.