| 摘要 |
PURPOSE:To enhance the heat insulating effect and consequently to enable to suppress the heat energy loss to the minimum by a structure wherein heating fluid is stored within a second leak-tight space and a low pressure near to vacuum is created in a first leak-tight space, which covers the second leak-tight space, in order to accumulate heat. CONSTITUTION:A casing 1 forming the first leak-tight space 4, within which a second casing 6 forming the second leak-tight space 5 is arranged, is provided. A heating fluid supply pipe 8 is connected to the casing 6 and as well as a suction device 13 is connected to the casing 1. Concretely, because that the heating fluid is stored within the space 5 and at the same time a low pressure near to vacuum is created in the space 4, which covers the space 5, in order to accumulate heat within the space 5, the high heat insulating effect between the space 5 and the surroundings is resulted and the heat energy loss can be suppressed to the minimum. Furthermore, when the release of heat is required, air is supplied to the space 4, which has served as heat insulating space during the time of heat accumulation, and the heat of the heating fluid is released outside through said air, resulting in enabling to eliminate the need of provision of a separate heat retaining tank and economize the installation cost of the equipment. |
