Abstract: An exterior heat insulation panel is disclosed which uses vaporization heat of water. The exterior heat insulation panel is installed on the surface of a roof or walls of a structure and is used for cooling and air-conditioning of structures, particularly, to an exterior heat insulation panel which can achieve high efficiency and energy-saving. The exterior heat insulation panel includes a surface layer having a continuous capillary tube structure and a non-capillary tube void structure made of porous aggregate combined by a hydrophilic binding component, and a foamed organic resin type of heat-retaining board having closed pores. The heat-retaining board and the surface layer are integrated by compression molding.

Abstract: An exterior heat insulation panel is disclosed which uses vaporization heat of water. The exterior heat insulation panel is installed on the surface of a roof or walls of a structure and is used for cooling and air-conditioning of structures, particularly, to an exterior heat insulation panel which can achieve high efficiency and energy-saving. The exterior heat insulation panel includes a surface layer having a continuous capillary tube structure and a non-capillary tube void structure made of porous aggregate combined by a hydrophilic binding component, and a foamed organic resin type of heat-retaining board having closed pores. The heat-retaining board and the surface layer are integrated by compression molding.

Abstract: The present invention provides a high-efficient method for cooling a structure by spraying water. An air/water mixture (31) including microbubbles each having a diameter of 75 ?m or less is generated by an air/water mixture generating unit (29) mounted in a part extending from a water supply source (2a) to a water spray port (7, 30, 49), the water spray port (7, 30, 49), or in a water tank (14). By spraying the generated air/water mixture (31) from the water spray port (7, 30, 49), a target surface such as a roof (24a) of a structure (24) is covered with the air/water mixture (31), and the target surface is cooled by heat of evaporation of water.