- Patent JPH0330079

Document Type and Number:

Japanese Patent JPH0330079

Kind Code:

B2

Abstract:

PURPOSE:To provide a heat accumulator with an excellent thermal efficiency which can be used as either heater or cooler by employing both a latent heat accumulating body which exchanges heat by the latent heat due to a phase transfer between a liquid phase and a solid phase and a granular heat accumulating layer which is formed by piling grains such as gravel or crushed stone. CONSTITUTION:Inside the heat insulating side plates 3, 3 in a housing 1, a granular heat accumulating layer 4 is formed by piling gravel, crushed stone, concrete pieces etc. Between the granular heat accumulating layer 4 and the top wall 1a of the housing 1, a latent heat accumulating body 8 covering the entire underside of the top wall 1a is disposed. The latent heat accumulating body 8 is made up by sealing a thermal medium 10 that exchanges heat by the latent heat due to a phase transfer between a liquid phase and a solid phase in a flat case 9. For the thermal medium, one or two kinds from among grease, wax, hydrocarbon, higher alcohol, polyhydric alcohol or higher fatty acid having the melting point of 10-90 deg.C will be suitable. When a room B is to be heated, a warm air such as outside air heated by the solar heat, air heated by making use of the night time electricity or waste heat from a boiler, etc. may be blown into the housing 1 through a feed air duct 11. If a cool air is fed into the housing 1 through the feed air duct 11, the room B can be cooled.