Silencing cover, compressor and refrigeration equipment

The utility model provides a noise reduction cover, a compressor and refrigeration equipment, the noise reduction cover comprises a cover body, the cover body is provided with a noise reduction cavity and a rotational flow channel; the air outlet is formed in the cover body, and the silencing cavity communicates with the air outlet through the rotational flow channel; at least one part of the rotational flow channel extends in the clockwise direction or the anticlockwise direction. 本实用新型提供了一种消音罩、压缩机和制冷设备，消音罩包括：罩体，罩体设有消音腔和旋流通道；出气口，设于罩体，消音腔通过旋流通道与出气口连通；其中，旋流通道的至少一部分沿顺时针方向或逆时针方向延伸。