Sanden Corporation

Shinichi Otake

Hirofumi Wada

Takayuki Kudo

Junichi Yabushita

Yuji Yoshii

Yuii Yoshii

An improved electrical insulation structure is provided for a motor driven fluid apparatus having the compression and drive mechanisms within a hermetically sealed housing. The drive mechanism comprises a drive shaft operatively connected to the compression mechanism and a motor for rotating the drive shaft. The motor comprises a rotor fixedly surrounding the drive shaft and a stator assembly surrounding the rotor with a small radial air gap therebetween. The stator assembly comprises an annular magnetic core fixedly secured to the housing. The core has a plurality of axially extending slots and a plurality of windings, each having a plurality of coils formed by multiple turns of an enamel-coated conductor. The multiple turns of the conductor have side turn portions which are disposed within the axially extending slots and end turn portions which axially project from the slots and are generally disposed about the axial end surfaces of the core. The connection points between the windings themselves, and between the windings and conductor leads, are fixedly covered with a film of insulating material, such as epoxy resin. Alternatively, a portion of the surface of the housing is fixedly covered with a film of insulating material, such as aluminum oxide formed by anodization.

Hermetic motor driven fluid apparatus having improved insulating

Refrigerant compressor

A lubricating mechanism for a motor driven scroll apparatus has the compression and drive mechanisms within a hermetically sealed housing. The drive mechanism comprises a drive shaft having a pin member extending from an inner end thereof and a motor for rotating the drive shaft. The pin member is operatively connected to an orbiting scroll of the compression mechanism through a bushing. The drive shaft includes a first axial bore extending from an open end adjacent a fluid inlet port and terminating adjacent the inner end of the drive shaft. Radial bores are provided at the terminal end of the first axial bore. A second axial bore extends from the terminal end of the drive shaft. The longitudinal axis of the first axial bore is substantially aligned with the second axial bore. The bushing includes a passage extending substantially straight therethrough and substantially aligned with the open end of the second axial bore. In another embodiment, the bushing further includes a radial straight portion radially extending from a terminal end of the axial straight portion and is open at an outer peripheral surface of the bushing.

Hermetic motor driven scroll apparatus having improved lubricating

Growing community of inventors

Isesaki, Japan

Shinichi Otake