Rotary compressor with muffler discharging into oil sump

In a refrigeration system containing refrigerant and serially including a high side rotary compressor, a condenser, expansion means and an evaporator, said compressor comprising:

• shell means having a first end and a second end;
• cylinder means containing pump means including a vane and a piston coacting with said cylinder means to define suction and compression chambers;
• said cylinder means being fixedly located in said shell means near said first end;
• first bearing means secured to said cylinder means and extending towards said first end;
• second bearing means secured to said cylinder means and extending towards said second end;
• a discharge port in said second bearing means;
• a normally closed discharge valve controlling flow through said discharge port,
• an oil sump located at the lowest portion of said shell means and containing oil therein;
• and
• muffler means for directing at least a major portion of the discharge flow passing through said discharge port into said oil in said oil sump whereby said oil is heated and foam is generated.