| abstract |
An insulating casing (21) comprising a wall body and an open-cell foamed resin body (4) made of a thermosetting resin filled by integrated foaming into an insulating space formed by the wall body; the open-cell foamed resin body including a plurality of cells (47), a cell membrane (42), a cell skeletal section (43), a first through-hole (44) formed so as to pass through the cell membrane, and a second through-hole (45) formed so as to pass through the cell skeletal section; and the plurality of cells being communicated by the first through-hole and the second through-hole. |