Scroll compression having a discharge muffler chamber

A scroll compressor comprising:

• a fixed scroll disposed in a sealed vessel and provided with a plate-like spiral tooth on a base plate having a discharge port for a high-pressure refrigerant gas at a center;
• an orbiting scroll disposed in said sealed vessel and having a base plate provided with a plate-like spiral tooth engaging said plate-like spiral tooth of said fixed scroll for forming a compression space;
• a discharge valve disposed at a high pressure space entrance of a single and only refrigerant gas flow passage from said discharge port of said fixed scroll to a high pressure space of said sealed vessel and opened/closed depending on a difference between pressure in said refrigerant gas flow passage and pressure in the high pressure space for allowing said refrigerant gas flow passage and the high pressure space to communicate with each other when said valve is opened and shutting off communication with each other when said valve is closed;
• and
• means defining a first muffler chamber communicating with the refrigerant gas flow passage from said discharge port of said fixed scroll to said discharge valve for absorbing pressure ripple when said discharge valve is closed,
• wherein said muffler chamber has a height dimension along a longitudinal axis line of said sealed vessel smaller than the diameter dimension of said discharge port of said fixed scroll.