Back-cavity-seam-free gas compressor treatment casing and gas compressor

The invention belongs to the technical field of mechanical gas compressors, and particularly relates to a back-cavity-seam-free gas compressor treatment casing and an gas compressor, the back-cavity-seam-free gas compressor treatment casing comprises a treatment ring and an air chamber arranged in the treatment ring, treatment seams are evenly formed in the treatment ring in the circumferential direction of the treatment ring at intervals, and the meridian projection of each treatment seam comprises a front edge face, an upper edge face and a tail edge face which are sequentially arranged, the upper edge face is a quadratic curve, the depth of the end, close to the tail edge face, of the upper edge face is larger than that of the end, close to the front edge face, of the upper edge face. The back-cavity-seam-free gas compressor treatment casing and gas compressor has the technical effects of reducing the weight of the compressor and ensuring good working performance of the compressor. 本申请属于机械压气机技术领域，具体包括一种无背腔