Scroll compressor having an orbiting scroll with volute wraps on both sides of a plate

A scroll compressor comprising an orbiting scroll having volute wraps on both sides of a flat plate;

• fixed scrolls arranged on the both sides of said orbiting scroll, each having a wrap paired face to face with a mating wrap of said orbiting scroll;
• and a drive shaft provided through said orbiting scroll and said fixed scrolls for orbiting said orbiting scroll inside said fixed scrolls, in which said orbiting scroll is provided with an orbiting motion while being prevented from turning round said fixed scrolls so that gas is compressed, wherein
• a concave groove is provided in said orbiting scroll extending from an outer circumferential edge surface of said orbiting scroll radially inwardly, and an Oldham's coupling is accommodated in the concave groove and engaged with said orbiting scroll so that said orbiting scroll is provided with an orbiting motion while being prevented from turning on its axis.