Compressor

Patent metadata

Field	Value
Publication number	US-12149124-B2
Application number	US-201916979027-A
Country	US
Kind code	B2
Filing date	Mar 14, 2019
Priority date	Mar 22, 2018
Publication date	Nov 19, 2024
Grant date	Nov 19, 2024

Abstract

A compressor includes a rotor that is fixed to a shaft, a stator that rotates the rotor about an axis of rotation, and a compressor part that compresses a refrigerant by the shaft rotating, wherein the rotor has a rotor core in which a refrigerant hole is formed, a first magnet that is embedded in the rotor core, and a second magnet that is embedded in the rotor core, an interior wall surface of the refrigerant hole includes a first portion that is formed on a side close to the first magnet, a second portion that is formed on a side close to the second magnet, and a magnet-side intermediate interior wall surface portion that is formed between the first portion and the second portion, and the magnet-side intermediate interior wall surface portion is closer to the axis of rotation than the first portion and the second portion.

First claim

The invention claimed is:

1. A compressor comprising:
a rotor that is fixed to a shaft;
a first core end plate;
a second core end plate;
a stator that causes the rotor to rotate about an axis of rotation;
a compressor part that compresses a refrigerant by the shaft rotating; and
a container that forms an interior space in which the rotor, the stator, and the compressor part are stored, wherein
the rotor has
a rotor core having formed therein an underside rotor end face facing the compressor part, an upper side rotor end face on a side opposite to the side on which the underside rotor end face is formed, an outer circumferential surface facing the stator, a rotor shaft hole through which the shaft passes, a refrigerant hole formed in an axial direction parallel to the axis of rotation allowing the refrigerant to flow therethrough, and a rivet hole,
a first magnet that is embedded in the rotor core, and
a second magnet that is embedded in the rotor core,

the rotor core is formed such that: both ends of the refrigerant hole are respectively formed in the underside rotor end face and the upper side rotor end face; the refrigerant hole does not pass through the rotor shaft hole; and the refrigerant hole does not pass through the outer circumferential surface,
the first magnet is provided in such a manner that one end on a side close to the second magnet is closer to the axis of rotation than another end is,
the second magnet is provided in such a manner that one end on a side close to the first magnet is closer to the axis of rotation than another end is,
the refrigerant hole is disposed between the one end of the first magnet and the axis of rotation, and is disposed between the one end of the second magnet and the axis of rotation,
a magnet-side interior wall surface of an interior wall surface of the refrigerant hole that is formed on a side far from the axis of rotation includes
a first magnet-side interior wall surface portion that is formed on a side close to the first magnet,
a second magnet-side interior wall surface portion that is formed on a side close to the second magnet, and
a magnet-side intermediate interior wall surface portion that is formed between the first magnet-side interior wall surface portion and the second magnet-side interior wall surface portion,

the magnet-side intermediate interior wall surface portion is formed on a side closer to the axis of rotation than the first magnet-side interior wall surface portion and the second magnet-side interior wall surface portion are,
the rivet hole is formed on a side farther from the axis of rotation than the refrigerant hole so that a position of the rivet hole in a circumferential direction does not overlap a position of the refrigerant hole in the circumferential direction,
the first core end plate is disposed in direct contact with the underside rotor end face,
the second core end plate is disposed in direct contact with the upper side rotor end face, and
the magnet-side interior wall surface of the refrigerant hole passes through from the underside rotor end face to the upper side rotor end face in the axial direction.

2. The compressor according to claim 1 , wherein
the rotor core has formed therein a magnet hole in which the first magnet and the second magnet are embedded,
the magnet hole is formed in a V shape, and is formed to follow a curved surface so as to be convex toward an inside diameter side,
the magnet hole includes a first magnet hole portion, a second magnet hole portion, and an intermediate hole portion,
the first magnet is embedded in the first magnet hole portion,
the second magnet is embedded in the second magnet hole portion, and
the first magnet hole portion and the second magnet hole portion are connected to each other through the intermediate hole portion.

3. The compressor according to claim 1 , wherein
the first magnet-side interior wall surface portion follows the first magnet, and
the second magnet-side interior wall surface portion follows the second magnet.

4. The compressor according to claim 1 , wherein
a rotor-shaft-hole-side interior wall surface of an interior wall surface of the refrigerant hole that is formed on a side close to the axis of rotation includes
a first rotor-shaft-hole-side interior wall surface portion that is adjacent to the first magnet-side interior wall surface portion,
a second rotor-shaft-hole-side interior wall surface portion that is adjacent to the second magnet-side interior wall surface portion, and
a rotor-shaft-hole-side intermediate interior wall surface portion that is formed between the first rotor-shaft-hole-side interior wall surface portion and the second rotor-shaft-hole-side interior wall surface portion, and

the rotor-shaft-hole-side intermediate interior wall surface portion is formed on a side closer to the rotor shaft hole than the first rotor-shaft-hole-side interior wall surface portion and the second rotor-shaft-hole-side interior wall surface portion are.

5. A compressor comprising:
a rotor that is fixed to a shaft;
a first core end plate;
a second core end plate;
a stator that causes the rotor to rotate about an axis of rotation;
a compressor part that compresses a refrigerant by the shaft rotating; and
a container that forms an interior space in which the rotor, the stator, and the compressor part are stored, wherein
the rotor has
a rotor core having formed therein an underside rotor end face facing the compressor part, an upper side rotor end face on a side opposite to the side on which the underside rotor end face is formed, an outer circumferential surface facing the stator, a rotor shaft hole through which the shaft passes, a refrigerant hole formed in an axial direction parallel to the axis of rotation allowing the refrigerant to flow therethrough, and a rivet hole,
a first magnet that is embedded in the rotor core, and
a second magnet that is embedded in the rotor core,

the rotor core is formed such that: both ends of the refrigerant hole are respectively formed in the underside rotor end face and the upper side rotor end face; the refrigerant hole does not pass through the rotor shaft hole; and the refrigerant hole does not pass through the outer circumferential surface,
the first magnet is provided in such a manner that one end on a side close to the second magnet is closer to the axis of rotation than another end is,
the second magnet is provided in such a manner that one end on a side close to the first magnet is closer to the axis of rotation than another end is,
the refrigerant hole is disposed between the one end of the first magnet and the axis of rotation, and is disposed between the one end of the second magnet and the axis of rotation,
a rotor-shaft-hole-side interior wall surface of an interior wall surface of the refrigerant hole that is formed on a side close to the rotor shaft hole includes
a first rotor-shaft-hole-side interior wall surface portion,
a second rotor-shaft-hole-side interior wall surface portion, and
a rotor-shaft-hole-side intermediate interior wall surface portion that is formed between the first rotor-shaft-hole-side interior wall surface portion and the second rotor-shaft-hole-side interior wall surface portion,

the rotor-shaft-hole-side intermediate interior wall surface portion is formed on a side closer to the rotor shaft hole than the first rotor-shaft-hole-side interior wall surface portion and the second rotor-shaft-hole-side interior wall surface portion are,
the rivet hole is formed on a side farther from the axis of rotation than the refrigerant hole so that a position of the rivet hole in a circumferential direction does not overlap a position of the refrigerant hole in the circumferential direction,
the first core end plate is disposed i

Assignees

• Fujitsu General Ltd

Inventors

• Nishio Tomoki

Classifications

• H02K7/14 Primary

  Structural association with mechanical loads, e.g. with hand-held machine tools or fans (with fan or impeller for cooling the machine H02K9/06) · CPC title

• H02K1/32

  with channels or ducts for flow of cooling medium · CPC title

• H02K1/2766

  having a flux concentration effect · CPC title

• H02K1/276 Primary

  Magnets embedded in the magnetic core, e.g. interior permanent magnets [IPM] · CPC title