Patent ID: 11879464
Assignee: MAHLE INTERNATIONAL GMBH
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F | IPC F

Claim 9:
10. A scroll-type electric compressor configured to compress a refrigerant, comprising:
a housing defining an intake volume and a discharge volume;
a refrigerant inlet port coupled to the housing and configured to introduce the refrigerant to the intake volume;
a refrigerant outlet port coupled to the housing and configured to allow compressed refrigerant to exit the scroll-type electric compressor from the discharge volume;
an inverter section including:
an inverter housing,
an inverter back cover connected to the inverter housing and forming an inverter cavity,
an inverter module mounted inside the inverter cavity and adapted to convert direct current electrical power to alternating current electrical power;

a motor section including:
a motor housing forming a motor cavity and being mounted to the inverter housing,
a drive shaft located within the motor housing, having first and second ends and defining a center axis,
a concentric protrusion located at the second end and being centered on the center axis and extending away from the concentric protrusion along the center axis, the second end of the drive shaft including a drive pin aperture having an offset axis, the offset axis being parallel to the center axis,
a motor located within the motor housing to controllably rotating the drive shaft about the center axis, and,
a drive pin located within the drive pin aperture and extending away from the drive shaft, the drive pin being centered on the offset axis;

a compression device including
a fixed scroll located within, and being fixed relative to, the housing, and
an orbiting scroll coupled to the drive shaft, the orbiting scroll and the fixed scroll forming compression chambers for receiving the refrigerant from the intake volume and compressing the refrigerant as the drive shaft is rotated about the center axis, the orbiting scroll having an inner circumferential surface,
a swing-link mechanism coupled to the drive shaft and having first and second apertures for receiving the concentric protrusion and the drive pin and an outer circumferential surface, and,
a ball bearing positioned between, and adjacent to each of, the inner circumferential surface of the orbiting scroll and the outer circumferential surface of the swing-link mechanism, the drive shaft, drive pin, orbiting scroll and swing-link mechanism being arranged to cause the orbiting scroll to orbit the center axis in an eccentric orbit; and

a front cover, wherein the housing is formed by the inverter back cover, the inverter housing, the motor housing, the fixed scroll and the front cover.