Scroll fluid machine
View Patent ↗A scroll compressor as a fluid machine includes a housing containing a scroll unit and an armature of an electric motor, and a connection device ( 66 ) for electrically connecting each stator coil ( 62 ) of the armature to a circuit board external to the housing. The connection device ( 66 ) includes a tubular lead holder ( 70 ) extending from inside the housing and gastightly passed through a through hole ( 68 ) to outside of a housing wall ( 16 ), the lead holder ( 70 ) having a head ( 72 ) and snap anchors ( 74 ) holding the housing wall ( 16 ) therebetween, and a wire-shaped lead ( 76 ) extending from the stator coil ( 62 ) and gastightly passed through the lead holder ( 70 ) to outside of the housing wall ( 16 ).
1. A scroll fluid machine comprising:
a housing including refrigerant for an air-conditioner;
a scroll unit contained in said housing and having a fixed scroll and a movable scroll;
an armature contained in said housing adjacently to the movable scroll of said scroll unit and configured to revolve the movable scroll to compress the refrigerant, said armature including a plurality of stator coils; and
a connection device for electrically connecting each of the plurality of stator coils of said armature to a feeder circuit external to said housing, said connection device including:
a housing wall forming part of said housing and having a through hole,
a tubular lead holder extending from inside said housing through the through hole to outside of said housing, the tubular lead holder having a center hole extending through the tubular lead holder in an axial direction thereof, a head located inside said housing, an outer end portion located outside of said housing, and snap anchors protruding integrally from the outer end portion in a radially outward direction of the tubular lead holder and engaging with an outer surface of the housing wall, the snap anchors being elastically deformable in the radially outward direction of the tubular lead holder, and having a distal end directed toward the housing wall, and a gap between each of the snap anchors and an outer peripheral surface of the tubular lead holder such that the each of the snap anchors can elastically deform about a base thereof in directions toward and away from the outer peripheral surface of the tubular lead holder, the tubular lead holder including the head, the outer end portion, and the snap anchors being a one-piece member of molded synthetic resin that is impermeable to the refrigerant,
a lead electrically connected to a stator coil of the plurality of stator coils, the lead extending from the stator coil to outside of said housing through the center hole of the tubular lead holder and connected to the feeder circuit, and
a seal structure configured to keep the tubular lead holder gastightly sealed with respect to the housing wall and further configured to keep the lead gastightly sealed with respect to the tubular lead holder, the seal structure preventing leakage of the refrigerant, the seal structure including a first seal member configured to gastightly seal a space between an inner peripheral surface of the through hole in the housing wall and the outer peripheral surface of the tubular lead holder and a second seal member configured to gastightly seal a space between an inner peripheral surface of the center hole and the outer peripheral surface of the lead, the first and second seal members being separate from the tubular lead holder,
wherein, when the tubular lead holder is fitted to the housing, the each of the snap anchors cooperate with the head to hold the housing wall between each distal end of the each of the snap anchors and the head.
2. The fluid machine according to claim 1 , wherein the snap anchors of the tubular lead holder each comprise a fin extending in the axial direction of the tubular lead holder.
3. The fluid machine according to claim 1 , wherein the first and second seal members are attached to the tubular lead holder.
4. The fluid machine according to claim 2 , wherein the seal structure further includes:
a third seal member configured to gastightly seal a gap between the head and the housing wall.
5. The fluid machine according to claim 4 , wherein the first, second and third seal members are attached to the tubular lead holder.
6. The fluid machine according to claim 1 , wherein the tubular lead holder comprises an electrical insulating material.
7. The fluid machine according to claim 1 , wherein said connection device further includes a screw thread formed on an outer end portion of the lead.
8. The fluid machine according to claim 7 , wherein the lead is an extended portion of a winding constituting said stator coil of the plurality of stator coils.
9. The fluid machine according to claim 7 , wherein said connection device further includes a connector for connecting a winding constituting said stator coil of the plurality of stator coils and an inner end of the lead.