JPWO2023276157A5

JPWO2023276157A5 -

Info

Publication number: JPWO2023276157A5
Application number: JP2023531332A
Authority: JP
Filing date: 2021-07-02
Publication date: 2024-02-01
Anticipated expiration: 2041-07-02

Description

前記した課題を解決するために、本発明に係るスクロール圧縮機は、密閉容器と、固定子及び回転子を有し、前記密閉容器に収容される電動機と、前記回転子と一体で回転するシャフトと、渦巻状の固定ラップを有する固定スクロールと、鏡板に設けられる渦巻状の旋回ラップを有し、前記固定ラップと前記旋回ラップとの間に圧縮室を形成する旋回スクロールと、前記シャフトを前記旋回スクロールに対して回転自在に軸支する旋回軸受と、前記シャフトの挿通孔を有し、前記固定スクロールを支持するフレームと、を備えるとともに、前記フレームと前記鏡板との間に設けられ、前記シャフトとともに回転する旋回バランスウェイトを備え、前記シャフトと前記旋回バランスウェイトとが嵌合しており、前記シャフト側の第１嵌合部と、前記旋回バランスウェイト側の第２嵌合部と、の間に隙間が設けられ、前記シャフトの端部には、前記シャフトの中心軸線に対して偏心している偏心穴が設けられ、前記電動機の駆動に伴って、前記旋回軸受が前記偏心穴の内周面に接触することとした。
In order to solve the above-described problems, a scroll compressor according to the present invention includes a closed container, a stator, and a rotor, an electric motor housed in the closed container, and a shaft that rotates integrally with the rotor. a fixed scroll having a spiral fixed wrap; an orbiting scroll having a spiral orbiting wrap provided on an end plate and forming a compression chamber between the fixed wrap and the orbiting wrap; A rotating bearing that rotatably supports the rotating scroll; and a frame having an insertion hole for the shaft and supporting the fixed scroll; A swing balance weight that rotates together with a shaft is provided, the shaft and the swing balance weight are fitted, and a first fitting part on the shaft side and a second fitting part on the swing balance weight side are provided. A gap is provided between the ends of the shaft, and an eccentric hole is provided at the end of the shaft, and as the electric motor is driven, the slewing bearing moves to the inner periphery of the eccentric hole. It was decided to make contact with the surface .

Claims

an airtight container;
an electric motor having a stator and a rotor and housed in the sealed container;
a shaft that rotates integrally with the rotor;
a fixed scroll having a spiral fixed wrap;
an orbiting scroll having a spiral orbiting wrap provided on an end plate and forming a compression chamber between the fixed wrap and the orbiting wrap;
an orbiting bearing that rotatably supports the shaft with respect to the orbiting scroll;
a frame having an insertion hole for the shaft and supporting the fixed scroll;
A rotating balance weight provided between the frame and the end plate and rotating together with the shaft,
The shaft and the rotating balance weight are fitted together,
A gap is provided between the first fitting part on the shaft side and the second fitting part on the rotating balance weight side ,
An eccentric hole eccentric to the central axis of the shaft is provided at the end of the shaft,
A scroll compressor in which the swing bearing contacts an inner circumferential surface of the eccentric hole as the electric motor is driven .

In the orbiting scroll, the orbiting wrap is provided on one side of the end plate, and the orbiting shaft is provided on the other side of the end plate,
The pivot shaft with the pivot bearing installed is fitted into the eccentric hole,
The scroll compressor according to claim 1, wherein the swing balance weight is provided radially outside a portion where the swing bearing is exposed from the eccentric hole.

A protrusion protruding toward the orbiting scroll is provided at the end of the shaft as the first fitting part,
The scroll compressor according to claim 2, wherein the swing balance weight is provided with a hole or a groove that fits into the protrusion as the second fitting part.

The radial length of the gap between the inner wall surface of the second fitting portion and the protrusion is longer than the radial length of the gap between the swing bearing and the swing balance weight. The scroll compressor according to claim 3, characterized in that:

A space between the orbiting scroll and the frame includes a first region including the insertion hole of the shaft when viewed from the direction of the central axis of the shaft, and a second region radially outside the first region; The scroll compressor according to claim 1, further comprising a partition wall member that partitions the scroll compressor into two.

The partition member is
an annular portion that has an annular shape when viewed from the direction of the central axis of the shaft and surrounds the swing bearing;
a peripheral wall extending from the outer peripheral edge of the annular portion toward the frame,
The scroll compressor according to claim 5, wherein an edge of the peripheral wall is in contact with the frame.

A groove for guiding lubricating oil from the first region to the second region is provided on a surface of the partition member on the orbiting scroll side and/or a surface of the end plate on the partition wall member side. The scroll compressor according to claim 6.

A first annular seal member provided in a gap between the rotating balance weight and the end plate;
The scroll compressor according to claim 1, further comprising a second annular seal member provided in a gap between the rotating balance weight and the frame.

A refrigeration cycle device comprising the scroll compressor according to any one of claims 1 to 8, an outdoor heat exchanger, an expansion valve, and an indoor heat exchanger.