Scroll compressor and refrigeration cycle apparatus

Patent metadata

Field	Value
Publication number	US-2019264687-A1
Application number	US-201616071102-A
Country	US
Kind code	A1
Filing date	Mar 30, 2016
Priority date	Mar 30, 2016
Publication date	Aug 29, 2019
Grant date	—

Abstract

A scroll compressor includes: a compression mechanism unit 3 that includes a fixed scroll 31 and an orbiting scroll 32; a crank shaft 6 that causes the orbiting scroll 32 to orbit about the fixed scroll 31; a slider 71 that is provided between the orbiting scroll 32 and the crank shaft 6 and that includes tubular portions 711 and 712 and a flange portion 713 projecting from the outer circumferential surface between one end and the other end of the tubular portions 711 and 712; and a balance weight 72 that is fitted to the slider 71 and that includes a ring-like portion 721 having a portion of the inner surface facing the flange portion 713, a weight portion 722 having an inner surface facing the tubular portion 711 or 712 closer to the one end side U than the flange portion 713, and a projection 723 projecting from the inner circumferential surface of the ring-like portion 721 and having an inner surface facing the tubular portion 711 or 712 closer to the other end side L than the flange portion 713.

First claim

1 . A scroll compressor comprising:
a compression mechanism unit including a fixed scroll and an orbiting scroll; a crank shaft configured to cause the orbiting scroll to orbit about the fixed scroll; a slider provided between the orbiting scroll and the crank shaft and including a tubular portion and a flange portion projecting from an outer circumferential surface between one end and an other end of the tubular portion; and a balance weight fitted to the slider and including
a ring-like portion having a portion of an inner surface facing the flange portion,
a weight portion having an inner surface facing the tubular portion closer to the one end than the flange portion, and
a projection projecting from an inner circumferential surface of the ring-like portion and having an inner surface facing the tubular portion at a portion closer to the other end than the flange portion is to the other end.

2 . The scroll compressor of claim 1 , wherein a surface of the flange portion at the other end and a surface of the projection at the one end are in contact with each other.

3 . The scroll compressor of claim 1 , wherein an outer surface of the flange portion and a portion of the inner surface of the ring-like portion are fitted together, or the inner surface of the projection and an outer surface of the tubular portion closer to the other end than the flange portion are fitted together.

4 . The scroll compressor of claim 1 , wherein
the outer surface of the tubular portion closer to the other end than the flange portion and the inner surface of the projection are fitted together, and a gap is provided between the outer surface of the flange portion and a portion of the inner surface of the ring-like portion.

5 . The scroll compressor of claim 1 , wherein the slider and the balance weight are shrink-fitted together.

6 . The scroll compressor of claim 1 , wherein
the tubular portion of the slider includes a first tubular portion and a second tubular portion, the second tubular portion being located on a portion closer to the one end, than to the other end, of the first tubular portion, and the flange portion is formed on the second tubular portion, at a portion close to the first tubular portion.

7 . The scroll compressor of claim 6 , wherein a thickness T 2 of the second tubular portion is larger than a thickness T 1 of the first tubular portion.

8 . The scroll compressor of claim 7 , wherein an outside diameter D 2 of the second tubular portion is larger than an outside diameter D 1 of the first tubular portion.

9 . A refrigeration cycle device comprising the scroll compressor of claim 1 , wherein refrigerant including HFO1234yf is used.

Assignees

• Mitsubishi Electric Corp

Inventors

• Okamoto Masaya
• Matsui Tomokazu
• Koyama Syuhei
• Takamura Yuji

Classifications

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C2240/807

  Balance weight, counterweight · CPC title

• F04C2210/22

  gaseous, i.e. compressible · CPC title

• F04C23/008

  Hermetic pumps · CPC title

• F04C2210/263

  HFO1234YF · CPC title