A suction muffler for an encapsulated refrigerant compressor , comprising - a suction muffler housing defining a suction muffler volume , wherein the suction muffler housing is made of plastic material, wherein the suction muffler housing has a lower housing part and an upper housing part ; wherein the upper housing part includes - an inlet section to allow refrigerant to enter the suction muffler volume , the inlet section comprising an inlet opening and an inlet tube for directing refrigerant to a first suction muffler chamber , the inlet opening being connected to the inlet tube and - an outlet section to allow refrigerant to escape from the suction muffler volume of the suction muffler towards the cylinder of the refrigerant compressor ; wherein the lower housing part includes an oil drain opening ; the suction muffler further comprises an inner housing element , which is inserted into the suction muffler housing , which inner housing element separates the suction muffler volume into the first suction muffler chamber and a second suction muffler chamber , characterized in that the inner housing element comprises a top wall and a side wall , wherein the first suction muffler chamber is bounded by the lower housing part , the top wall of the inner housing element and the side wall of the inner housing element , and wherein the top wall has a protruding tubular section , wherein at least a section of the inlet tube is received by the protruding tubular section of the inner housing element . - a suction muffler housing defining a suction muffler volume , wherein the suction muffler housing is made of plastic material, wherein the suction muffler housing has a lower housing part and an upper housing part ; wherein the upper housing part includes - an inlet section to allow refrigerant to enter the suction muffler volume , the inlet section comprising an inlet opening and an inlet tube for directing refrigerant to a first suction muffler chamber , the inlet opening being connected to the inlet tube and - an outlet section to allow refrigerant to escape from the suction muffler volume of the suction muffler towards the cylinder of the refrigerant compressor ; - an inlet section to allow refrigerant to enter the suction muffler volume , the inlet section comprising an inlet opening and an inlet tube for directing refrigerant to a first suction muffler chamber , the inlet opening being connected to the inlet tube and - an outlet section to allow refrigerant to escape from the suction muffler volume of the suction muffler towards the cylinder of the refrigerant compressor ; wherein the lower housing part includes an oil drain opening ; the suction muffler further comprises an inner housing element , which is inserted into the suction muffler housing , which inner housing element separates the suction muffler volume into the first suction muffler chamber and a second suction muffler chamber , characterized in that the inner housing element comprises a top wall and a side wall , wherein the first suction muffler chamber is bounded by the lower housing part , the top wall of the inner housing element and the side wall of the inner housing element , and wherein the top wall has a protruding tubular section , wherein at least a section of the inlet tube is received by the protruding tubular section of the inner housing element . <EOS>