Cooling system

A cooling system for cooling a finite space defined by a building structure for accommodating a heat-generating body, said building structure being adapted to be located in a geographical region where a large difference is observed between maximum daytime and minimum nighttime temperatures, said cooling system comprising;

• a first heat exchanger disposed outside said space;
• a second heat exchanger disposed inside said space at a level lower than said first heat exchanger;
• a heat storage means disposed inside said space at a level intermediate between said first and second heat exchangers;
• a conduit means for constituting a closed fluid path linking and extending into said first and second heat exchangers and said heat storage means;
• a condensable refrigerant filling and flowing through said fluid path depending on the temperature difference between said space and outside thereof, said refrigerant being capable of evaporating through heat absorption at a temperature higher than a value preset for said space, and of being liquefied through heat discharge at a temperature lower than said maximum daytime temperature;
• and
• a heat storing agent charged in said heat storage means in contact with said fluid path, said heat storing agent being capable of being solidified through heat discharge when cooled during nighttime by said refrigerant flowing thereinto after being cooled at said first heat exchanger, and of being liquefied through heat absorption when heated during daytime by said refrigerant heated due to said heat generating body.