Refrigerating system with pressure control valve

A refrigerating system comprising:

• a passageway for a refrigerant;
• a compressor for compressing the refrigerant;
• a heat emitter for cooling the refrigerant compressed at the compressor;
• a pressure control valve for reducing the pressure of the refrigerant at an outlet of said heat emitter;
• and
• an evaporator for evaporating the refrigerant of the reduced pressure from the pressure control valve;
• said pressure control valve comprising:
• a partition wall for dividing said passageway into an upstream chamber for receiving the refrigerant from the heat emitter and a downstream chamber for issuing the refrigerant to the evaporator;
• said partition wall defining a valve port located between the upstream and downstream chambers;
• a deflector having a sealingly closed chamber therein and deflecting in response to a pressure difference between said sealingly closed chamber and the upstream chamber;
• and
• a valve member for controlling a communication of the upstream chamber with the downstream chamber via said valve port;
• said deflector commencing said deflection when a pressure at the upstream chamber is higher than a pressure in the sealingly closed chamber by a predetermined value;
• said deflector being connected to said valve member in such a manner that the commencing of the deflection of the deflector causes the valve member to be detached from the valve port;
• wherein said refrigerant is carbon dioxide;
• and
• said refrigerant being filled to a volume of said sealingly closed chamber as obtained when said valve member closes said valve port at a density in a range between 450 kg/m.sup.3 and 950 kg/m.sup.3.