COMPOSITE HEAT-INSULATING MATERIAL, HEAT RETENTION TANK, AND HEAT-PUMP-TYPE HOT WATER SUPPLY DEVICE

摘要

The objective of the present invention is to provide a composite heat-insulating material, a heat retention tank, and a heat-pump-type hot water supply device which have high heat-insulating capability even when a packaging material containing aluminum foil or a thick metal evaporation film is used in a vacuum-insulating material. This composite heat-insulating material is equipped with: a vacuum-insulating material (1) having a core material comprising a laminate structure of fiber sheets, and an outer cover material that vacuum-seals and covers the core material; and styrol foam (8a, 8b, 8c) formed integrally with the vacuum-insulating material (1). The styrol foam (8a, 8b, 8c) is arranged on the entire surface of the high-temperature-side surface (7) of the vacuum-insulating material (1), facing the high-temperature side, and on the peripheral portion of the low-temperature-side surface (10) of the vacuum-insulating material (1), facing the low-temperature side.