Scroll compressor

Patent metadata

Field	Value
Publication number	US-2020400143-A1
Application number	US-201716619507-A
Country	US
Kind code	A1
Filing date	Aug 4, 2017
Priority date	Aug 4, 2017
Publication date	Dec 24, 2020
Grant date	—

Abstract

A scroll compressor includes a slider. The slider includes a cylindrical portion and a balance weight portion. The balance weight portion includes a counter weight part, a first main weight component, and a second main weight component. The counter weight part has a first outer circumferential surface that is a partial cylindrical surface about the axis of rotation of the slider. The first main weight component has a second outer circumferential surface that is a partial cylindrical surface about the axis of the cylindrical portion. The second main weight component has a third outer circumferential surface that is located radially outward of the second outer circumferential surface and that is a partial cylindrical surface about the axis of rotation of the slider and an inner circumferential surface that is a partial cylindrical surface about the axis of the cylindrical portion.

First claim

1 . A scroll compressor comprising:
a fixed scroll; an orbiting scroll orbiting relative to the fixed scroll; a main shaft transmitting a rotational driving force to the orbiting scroll; an eccentric shaft disposed at a first end of the main shaft, the eccentric shaft being located eccentrically with respect to an axis of the main shaft in an eccentric direction; a slider having a slide hole slidably receiving the eccentric shaft; and an orbiting bearing located at the orbiting scroll, the orbiting bearing rotatably supporting the slider, wherein the slider includes
a cylindrical portion rotatably supported by the orbiting bearing and
a balance weight portion located radially outward of the cylindrical portion,
wherein assuming that a counter-eccentric direction is a direction opposite to the eccentric direction, the balance weight portion includes
a counter weight part located in the eccentric direction of a rotation axis of the slider and joined to the cylindrical portion,
a first main weight component located in the counter-eccentric direction of the rotation axis of the slider and joined to the cylindrical portion, and
a second main weight component located in the counter-eccentric direction of the rotation axis of the slider and protruding from peripheral part of the first main weight component toward the orbiting scroll,
wherein the counter weight part has a first outer circumferential surface that is a partial cylindrical surface about the rotation axis of the slider, wherein the first main weight component has a second outer circumferential surface that is a partial cylindrical surface about an axis of the cylindrical portion, and wherein the second main weight component has a third outer circumferential surface that is located radially outward of the second outer circumferential surface and that is a partial cylindrical surface about the rotation axis of the slider and an inner circumferential surface that is a partial cylindrical surface about the axis of the cylindrical portion.

2 . The scroll compressor of claim 1 , wherein the third outer circumferential surface has a radius identical to that of the first outer circumferential surface.

3 . The scroll compressor of claim 2 , wherein the balance weight portion has a circular shape that is eccentric with respect to the cylindrical portion as viewed in a direction along the axis of the cylindrical portion.

4 . The scroll compressor of claim 1 , wherein the second outer circumferential surface extends across an angle of 180 degrees or more as viewed in a direction along the axis of the cylindrical portion.

5 . The scroll compressor of claim 1 , wherein assuming that a major-axis direction is a direction that is one of a direction parallel to the eccentric direction and a direction perpendicular to the eccentric direction in a plane perpendicular to the axis of the cylindrical portion and in which the slide hole has a relatively large dimension, a minor-axis direction is a direction that is an other one of the directions and in which the slide hole has a relatively small dimension, and a radial thickness is a thickness of the balance weight portion along a radius of the balance weight portion about the axis of the cylindrical portion in a plane that is perpendicular to the axis of the cylindrical portion and that includes a junction where the cylindrical portion and the balance weight portion are joined, the radial thickness of the balance weight portion in the minor-axis direction is smaller than or equal to that of the balance weight portion in the major-axis direction.

6 . The scroll compressor of claim 1 , wherein R410A refrigerant, R32 refrigerant, or HFO-1234yf refrigerant is used as a fluid that is compressed between the fixed scroll and the orbiting scroll.

Assignees

• Mitsubishi Electric Corp

Inventors

• Fukuhara Koichi
• Matsui Tomokazu
• Takamura Yuji

Classifications

• F04C29/0021

  Systems for the equilibration of forces acting on the pump (interstice adjustment other than by fluid pressure F01C21/102) · CPC title

• F04C2210/268

  R32 · CPC title

• F04C18/0215 Primary

  where only one member is moving · CPC title

• F04C2240/807

  Balance weight, counterweight · CPC title

• F04C2240/60

  Shafts · CPC title