Compressor

Patent metadata

Field	Value
Publication number	US-11784525-B2
Application number	US-201916980625-A
Country	US
Kind code	B2
Filing date	Apr 17, 2019
Priority date	Apr 27, 2018
Publication date	Oct 10, 2023
Grant date	Oct 10, 2023

Abstract

A rotor that gives rotational power to a compressor part that compresses refrigerant has a rotor core in which through-holes through which the refrigerant passes are formed, the through-holes having a cross section with a plurality of forks in a direction away from a rotation axis, a first end plate that covers a first end surface where one end of both end portions of the through-holes of the rotor core closer to the compressor part is formed, and an upper rotor end plate that covers a lower rotor end surface where the other end of the plurality of holes of the rotor core is formed. The first end plate has a first opening portion that causes the through-holes to communicate with an internal space. The upper rotor end plate has an upper opening portion that causes the through-holes to communicate with the internal space. The upper rotor end plate has projection portions that cover tip end portions, which are divided to respective forks, of the through-holes.

First claim

The invention claimed is:

1. A compressor comprising:
a rotor;
a stator that rotates the rotor around a rotation axis;
a compressor part that compresses refrigerant by rotation of the rotor; and
a sealed container that forms an internal space in which the rotor, the stator, and the compressor part are housed,
wherein the rotor has
a rotor core in which a plurality of holes through which the refrigerant passes are formed,
a first end plate that covers a first end surface where one end of both end portions of the plurality of holes of the rotor core closer to the compressor part is formed, and
a second end plate that covers a second end surface where the other end of the plurality of holes of the rotor core is formed,
the first end plate has a first opening portion that causes the plurality of holes to communicate with the internal space,
the second end plate has a second opening portion that causes the plurality of holes to communicate with the internal space, and
a plurality of projection portions that cover a region of the other end of the hole distant from the rotation axis are formed.

2. The compressor according to claim 1 ,
wherein the hole has a cross section having a V-shape of which a bent portion projects toward the rotation axis,
the second opening portion exposes a region closer to the rotation axis than the plurality of holes to the internal space, and
the projection portion that covers tip end portions at both ends of the V-shape formed on the other end of the hole is formed.

3. The compressor according to claim 1 , wherein the second opening portion is formed of one hole that causes all of the plurality of holes to communicate with the internal space.

4. The compressor according to claim 1 , wherein the first opening portion is formed of one hole that causes all of the plurality of holes to communicate with the internal space.

5. The compressor according to claim 4 , wherein the first opening portion exposes the hole and a partial region of the rotor core adjacent to the hole in a circumferential direction to the internal space.

Assignees

• Fujitsu General Ltd

Inventors

• Yahaba Shingo
• Ueda Kenshi
• Nishio Tomoki

Classifications

• H02K1/32 Primary

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

• F25B31/006

  Cooling of compressor or motor · CPC title

• H02K1/276

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

• H02K1/28

  Means for mounting or fastening rotating magnetic parts on to, or to, the rotor structures · CPC title

• H02K21/16 Primary

  having annular armature cores with salient poles (with homopolar co-operation H02K21/20) · CPC title