Refrigeration apparatus

A temperature-opening type expansion valve comprising;

• a body case;
• a liquid-phase refrigerant influx passage provided on said body case into which flows liquid-phase refrigerant condensed by a condenser;
• a restricting passage provided on a downstream side of said liquid-phase refrigerant influx passage within said body case to reduce pressure of liquid-phase refrigerant;
• a valve provided within said body case to regulate a degree of opening of said restricting passage;
• a gas-liquid separation means provided within said body case to separate gas-liquid two-phase refrigerant pressure-reduced by said restricting passage into liquid-phase refrigerant and gas-phase refrigerant;
• a liquid-phase discharge passage provided in said body case so as to be communicated with an inlet side of an evaporator, to discharge liquid-phase refrigerant separated by the said gas-liquid separation means to an inlet side of the evaporator;
• a gas-phase discharge passage provided in said body case to discharge gas-phase refrigerant separated by the said gas-liquid separation means to an evaporator outlet side;
• a gas-phase refrigerant passage provided in said body case so as to cause gas-phase refrigerant evaporated by said evaporator to flow in and be united with gas-phase refrigerant from said gas-phase refrigerant discharge passage during a process thereof, and to cause gas-phase refrigerant after said union to flow into an intake side of said compressor;
• a temperature-sensing means disposed in a location in said gas-phase refrigerant passage which is upstream of a union location of gas-phase refrigerant evaporated by said evaporator and gas-phase refrigerant from said gas-phase refrigerant discharge passage, to sense temperature of gas-phase refrigerant evaporated by said evaporator;
• and
• a valve operating means to regulate a degree of opening of said valve in correspondence to said gas-phase refrigerant temperature sensed by means of said temperature-sensing means.