US 2019/0316587 A1 · MOTOR-OPERATED COMPRESSOR

Abstract

A motor-operated compressor includes a casing having an inner space including a suction space and a discharge space. A first scroll is disposed in the inner space of the casing. A second scroll is configured to orbit in engagement with the first scroll to form a pair of two compression chambers between the first scroll and the second scroll. A rotary shaft is coupled to the second scroll and configured to transfer a rotational force of a driving motor to the second scroll. An intermediate pressure space is formed on one side of the second scroll and in fluid communication with the discharge space. Oil entering the intermediate pressure space from the discharge space forms back pressure supporting the second scroll toward the first scroll, and a portion of the oil flows into the suction space.

Claims15

Dependent claims

A motor-operated compressor comprising:

a casing having an inner space composed of a suction space and a discharge space;
a first scroll disposed in the inner space of the casing;
a second scroll configured to orbit in engagement with the first scroll to form a pair of two compression chambers between the first scroll and the second scroll;
a rotary shaft coupled to the second scroll and configured to transfer a rotational force of a driving motor to the second scroll;
and
an intermediate pressure space formed on one side of the second scroll in fluid communication with the discharge space, the intermediate pressure space being configured to accommodate oil flowing in from the discharge space to form back pressure supporting the second scroll toward the first scroll, and the intermediate pressure space also being formed in fluid communication with the suction space so that a portion of the accommodated oil flows out into the suction space.

3 more elements

A motor-operated compressor comprising:

a casing having an inner space comprising a suction space and a discharge space;
a first scroll disposed in the inner space of the casing;
a second scroll configured to orbit in engagement with the first scroll to form a pair of two compression chambers between the first scroll and the second scroll;
a frame positioned opposite to the first scroll with the second scroll being interposed between the frame and the first scroll;
a rotary shaft having a first bearing part radially supported by the frame, a second bearing part radially supported by the first scroll, and an eccentric part positioned between the first bearing part and the second bearing part and eccentrically coupled to the second scroll;
and
an oil flow path having one end in fluid communication with the discharge space formed in the rotary shaft;
at least one oil supply hole formed through the rotary shaft from the oil flow path to an outer peripheral surface of the rotary shaft, the at least one oil supply hole being configured to guide oil from the discharge space to a respective one of the first bearing part, the second bearing part, or the eccentric part,
the at least one oil supply hole comprising:
a first oil supply hole formed within an axial range of the second bearing part;
and
a second oil supply hole formed within an axial range of the eccentric part.

9 more elements

Dependencies are inferred from the claim text.

Motor-operated compressor

Life of this patent

Motor-operated compressor

Life of this patent

Abstract

Claims15