Scroll compressor and control method thereof

Abstract

The invention relates to a scroll compressor and a control method thereof. The scroll compressor provided by the invention comprises: a scroll assembly, a motor, a bypass device, and a control device,wherein the scroll assembly comprises a fixed scroll and a movable scroll cooperating with each other to compress working fluid; the fixed scroll comprises a first fixed scroll blade, the movable scroll comprises a first movable scroll blade, and the first fixed scroll blade and the first movable scroll blade cooperate to define a first compression chamber group; the motor drives the scroll assembly to operate by a rotating shaft; the bypass device is configured to selectively communicate one or more compression chambers of the first compression chamber group with a suction pressure region ofthe scroll compressor; the control device is configured to control the motor and the bypass device, so that the bypass device is turned on before or when starting the motor. The invention further provides a corresponding control method of the scroll compressor.

Description

technical field [0001] The present invention relates to compressors, in particular to scroll compressors and related control methods. Background technique [0002] The statements in this section merely provide background information related to the present disclosure and may not constitute prior art. [0003] A scroll compressor is a commonly used compressor. After the compressor is powered on, the motor of the compressor starts to rotate, and pressure begins to build up in the compression chamber of the scroll assembly. Generally, within a short time after the compressor is started, a high pressure is rapidly generated in the compression chamber. During operation of the compressor, there is friction between various components within the compressor, for example, friction between bearings and constituent parts of the scroll assembly. This friction is usually mitigated by delivering lubricating oil from the bottom sump. However, within a short period of time after the start ...

AI Technical Summary

Problems solved by technology

In this case, the acceleration impact of the motor will also be large, resulting in a large starting current, and the resulting local high temperature will hinder the establishment of effective lubrication at the friction pair

As a result, excessive starting pressure load and lubrication failure will cause the motor to fail to rotate and cannot start normally, which is the so-called "stall".

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