Rotary compressor having an injection connecting pipe that extends to an upper portion of a compressor housing and that is linked to an injection pipe via an injection pipe taking-out portion

Patent metadata

Field	Value
Publication number	US-10495091-B2
Application number	US-201715479483-A
Country	US
Kind code	B2
Filing date	Apr 5, 2017
Priority date	Apr 12, 2016
Publication date	Dec 3, 2019
Grant date	Dec 3, 2019

Abstract

A compressor includes: an annular cylinder; a rotation shaft which is rotated by the motor; a piston which revolves along an inner circumferential surface of the cylinder, and forms a cylinder chamber on the inside of the cylinder; a vane which protrudes to the inside of the cylinder chamber from a vane groove provided in the cylinder, and divides the cylinder chamber into an inlet chamber and a compression chamber by abutting against the piston; and an injection hole which injects a liquid refrigerant to the inside of the compression chamber. The center of the injection hole is disposed to be within a fan-like range of which a center angle is equal to or less than 40° toward a side opposite to a connection position between the compressor housing and the inlet unit from a center line of the vane groove in the circumferential direction of the rotation shaft.

First claim

What is claimed is:

1. A rotary compressor comprising:
a sealed vertically-placed cylindrical compressor housing in which a discharging unit for a refrigerant is provided in an upper portion, and an inlet unit for the refrigerant is provided in a lower portion;
a compressing unit which is disposed in the lower portion of an inside of the compressor housing, which compresses the refrigerant suctioned from the inlet unit, and which discharges the refrigerant from the discharging unit;
a motor which is disposed in the upper portion of the inside of the compressor housing, and which drives the compressing unit; and
an accumulator which is fixed to an outer circumferential surface of the compressor housing, and which is connected to the inlet unit,
wherein the compressing unit includes
an annular cylinder,
an upper end plate which closes an upper side of the cylinder,
a lower end plate which closes a lower side of the cylinder,
a rotation shaft which has an eccentric portion and which is rotated by the motor,
a piston which is fitted to the eccentric portion, which revolves along an inner circumferential surface of the cylinder, and which forms a cylinder chamber on an inside of the cylinder, and
a vane which protrudes to an inside of the cylinder chamber from a vane groove provided in the cylinder, and which divides the cylinder chamber into an inlet chamber and a compression chamber by abutting against the piston,
the rotary compressor includes
an injection pipe for injecting a liquid refrigerant to an inside of the compression chamber,
an injection pipe taking-out portion which is provided on an outer circumferential surface of the compressor housing, and to which one end portion of the injection pipe is fixed, and
an injection connecting pipe in which one end portion thereof is linked to the injection pipe via the injection pipe taking-out portion,
a center line of the injection pipe taking-out portion is disposed to be within a range of a fan shape along a circumferential direction of the rotation shaft whose center angle around a center of the rotation shaft is equal to or less than 60° toward a vane groove side from a center line of a connection position between the compressor housing and the inlet unit, in a circumferential direction of the outer circumferential surface of the compressor housing, and
the other end portion of the injection connecting pipe which extends in a direction away from the inlet unit in the circumferential direction of the outer circumferential surface of the compressor housing, and which extends to the upper portion of the compressor housing.

2. The rotary compressor according to claim 1 ,
wherein a center line of the other end portion of the injection connecting pipe is separated from a center line of the connection position of the inlet unit by a center angle around the center of the rotation shaft which is equal to or greater than 80° toward the vane groove side, in the circumferential direction of the outer circumferential surface of the compressor housing.

3. The rotary compressor according to claim 1 ,
wherein the other end portion of the injection connecting pipe is disposed at a position which opposes the outer circumferential surface of the compressor housing.

4. The rotary compressor according to claim 1 ,
wherein, in the injection connecting pipe, both end portions extend along a rotation shaft direction to the upper portion of the compressor housing, and an intermediate portion of both end portions extends in the circumferential direction of the outer circumferential surface of the compressor housing.

5. The rotary compressor according to claim 1 ,
wherein, in the injection connecting pipe, one end portion which is linked to the injection pipe taking-out portion extends in a radial direction of the compressor housing.

Assignees

• Fujitsu General Ltd

Inventors

• Ueda Kenshi
• Inoue Akira
• Morozumi Naoya
• Izumi Yasuyuki

Classifications

• F04C2240/60

  Shafts · CPC title

• F04C18/3564

  the surfaces of the inner and outer member, forming the working space, being surfaces of revolution · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F04C2240/804

  Accumulators for refrigerant circuits · CPC title

• F04C2240/806

  Pipes for fluids; Fittings therefor · CPC title