| 摘要 |
PROBLEM TO BE SOLVED: To simultaneously, efficiently and uniformly heat a plurality of flat heat storage packs by arranging a heat storage pack fixing part so that the heat storage packs may hold a surface exothermic body at the time of heating the heat storage packs. SOLUTION: In a heat storage pack fixing part 2 provided on a main body 1, flat heat storage packs 3 are stored. Next, after the main body 1 is folded into two, a fastener 4 provided on the surrounding part of the main body 1 is closed, further, a cover plate 5 is covered on the main body 1 and a latch tool 6 is latched. Subsequently, a plug 7 for inserting household 100 V power source or a plug for connecting an automobile power source 8 is inserted into a power source, a surface exothermic body 9 arranged so as to hold the heat storage packs 3 is energized, heat is generated in the surface exothermic body 9 and the heat storage packs 3 are heated. At this time, as for a temperature gradient, the surface exothermic body 9, the heat storage packs 3 and the main body 1 are placed in this order, thermal loss is reduced and the heat storage packs 3 are heated.
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