Motor-driven compressor including a shield to block electromagnetic noise

摘要

A motor-driven compressor includes a compression unit, an electric motor, a housing, a cover, wherein the cover includes a main body and a connector coupler, and the cover and the housing define an accommodating chamber, a motor driving circuit that is accommodated in the accommodating chamber and includes a circuit board, and a metal terminal held in the connector coupler, wherein the metal terminal includes first and second end portions. The cover has a shield including a first shield portion, which blocks electromagnetic noise and forms at least part of the connector coupler, and a second shield portion, which blocks electromagnetic noise and forms at least part of the main body. The first and second shield portions are coupled to each other. The second shield portion includes an insertion hole into which one of the first and second end portions of the metal terminal is insertable.

主权项

1. A motor-driven compressor comprising:
a compression unit configured to compress refrigerant; an electric motor configured to drive the compression unit; a rotation shaft configured to transmit a driving force of the electric motor to the compression unit; a housing that accommodates the compression unit, the electric motor and the rotation shaft and includes an outer surface; a cover formed of resin and coupled to the outer surface of the housing, wherein the cover includes a main body and a connector coupler connectable to a connector of an external power supply, and the cover and the outer surface of the housing define an accommodating chamber; a motor driving circuit accommodated in the accommodating chamber, wherein the motor driving circuit is configured to drive the electric motor and includes a circuit board; a metal terminal held in the connector coupler, wherein the metal terminal includes a first end portion, which is electrically connected to the external power supply, and a second end portion, which is electrically connected to the circuit board; and a shield including a first shield portion and a second shield portion, which are formed of metal and integrally formed with the cover formed of resin, wherein the first shield portion is configured to block electromagnetic noise and forms at least part of the connector coupler, and the second shield portion is configured to block electromagnetic noise and forms at least part of the main body, the first and second shield portions are coupled to each other, the second shield portion includes an insertion hole into which one of the first and second end portions of the metal terminal is insertable, the first shield portion includes a first cylinder shaped portion, which extends in a direction of the rotation shaft and is configured to accommodate the first end portion of the metal terminal, and a flange portion, which extends from the first cylinder shaped portion in a radial direction with respect to the rotation shaft, the second shield portion includes a second cylinder shaped portion, which extends in a direction parallel to the axial direction of the rotation shaft, and a planer end portion, which is formed at one end of the second cylinder shaped portion and extends radially inward, with respect to the rotation shaft, from the one end of the second cylinder shaped portion, the insertion hole is formed in the planer end portion, and the flange portion of the first shield portion overlaps with one of an inner surface or an outer surface of the planer end portion of the second shield portion, and the flange portion is in contact with and coupled to the one of the inner surface or the outer s face of the planer end portion.