Compressor for compressing refrigerant and having a motor with insulator tooth portions

Patent metadata

Field	Value
Publication number	US-10630130-B2
Application number	US-201715718908-A
Country	US
Kind code	B2
Filing date	Sep 28, 2017
Priority date	Sep 30, 2016
Publication date	Apr 21, 2020
Grant date	Apr 21, 2020

Abstract

A compressor includes a shaft, a motor portion, and a compressor portion. The motor portion rotates the shaft. The compressor portion compresses refrigerant by rotation of the shaft. The motor portion has an upper insulator, a stator core, and a winding wire. The upper insulator has a plurality of insulator tooth portions. The stator core has a plurality of stator core tooth portions corresponding to the plurality of insulator tooth portions of the upper insulator. The plurality of stator core tooth portions of the stator core are respectively covered with a plurality of teeth of the upper insulator and are respectively wound around thereof by the winding wire. The insulator tooth portion of the upper insulator has a groove through which lubricant oil poured into the compressor portion passes on a stator core contacting surface which is in contact with the stator core tooth portion of the stator core.

First claim

What is claimed is:

1. A compressor comprising:
a shaft;
a motor portion that has a rotor fixed to the shaft and a stator surrounding the rotor;
a compressor portion that compresses refrigerant by rotation of the shaft; and
a container that stores the shaft, the motor portion, and the compressor portion therein,
wherein the stator includes
an insulator in which a plurality of insulator tooth portions are formed,
a stator core in which a plurality of stator core tooth portions corresponding to the plurality of insulator tooth portions are formed, and
a plurality of winding wires that are wound around the plurality of stator core tooth portions and the plurality of insulator tooth portions,
wherein in at least one of the plurality of insulator tooth portions, a groove through which lubricant oil for lubricating the compressor portion passes is formed on a surface which is in contact with one of the plurality of stator core tooth portions.

2. The compressor according to claim 1 ,
wherein a partition that divides the groove into a plurality of sub-grooves is formed in the insulator.

3. The compressor according to claim 2 ,
wherein the partition is continuously formed from an inner circumferential portion to an outer circumferential portion of the stator core.

4. The compressor according to claim 1 ,
wherein in the shaft, a supply portion that supplies lubricant oil from an oil reservoir which is formed inside the container to an end surface of the rotor is formed, and
wherein the rotor is disposed so that an imaginary plane along the end surface overlaps the groove.

5. The compressor according to claim 1 ,
wherein the insulator is formed so that a sectional area of a cross section of the groove in a circumferential direction of the stator becomes gradually larger as the groove approaches the rotor.

6. The compressor according to claim 1 ,
wherein in the stator core, a cutout portion is formed on an outer circumference of the stator core corresponding to at least one of the plurality of insulator tooth portions, on which the groove is formed, of a surface facing the container, and
the cutout portion is formed so as to supply lubricant oil passed through the groove to the compressor portion.

7. The compressor according to claim 6 ,
wherein a first imaginary line obtained by virtually extending a flow channel formed by the cutout portion and an inner circumferential surface of the container in an axial direction of an inner space of the container, and a second imaginary line obtained by virtually extending the groove toward the inner circumferential surface of the container, are formed to intersect each other.

Assignees

• Fujitsu General Ltd

Inventors

• Suzuki Takashi
• Nishio Tomoki

Classifications

• H02K3/38

  around winding heads, equalising connectors, or connections thereto · CPC title

• H02K3/44 Primary

  Protection against moisture or chemical attack; Windings specially adapted for operation in liquid or gas · CPC title

• F25B2500/16

  Lubrication · CPC title

• F04C29/028

  Means for improving or restricting lubricant flow · CPC title

• F04C23/02 Primary

  Pumps characterised by combination with, or adaptation to, specific driving engines or motors · CPC title