an insulating lid having a double walled structure made. wherein an insulating lid can be freely opened and closed
1. A cold-hot storage box comprising:
an insulating container formed into a box having an opening, said container having a double walled structure made from an inner container and an outer container which are unitarily joined so as to maintain a space therebetween as an insulation layer;
an insulating lid having a double walled structure made from an outer panel and an inner panel which are unitarily joined so as to maintain a space therebetween as an insulation layer;
and a heat exchange means which controls the temperature in said insulating container;
wherein an insulating lid can be freely opened and closed and is attached to edge portions of said opening of said insulating container;
wherein at least one gas having low thermal conductivity selected from the group consisting of xenon, krypton, and argon is enclosed in the space provided in said insulating container and lid respectively; and
wherein a gas injection pipe is sealed at its tip and connected to said insulation layer and a knob which covers said gas injection pipe is provided on said lid.
solar cold-hot box
