Method for getting the inside of a thermally insulated space up to temperature and maintaining it at temperature without the provision on continuous energy, and associated device

A method of bringing to temperature and holding at temperature the internal volume of a thermally insulated enclosure, wherein:

• a device is provided comprising:
• at least a first and a second system chosen independently of each other from among absorption systems, adsorption systems and thermochemical systems, said first and second systems each comprising:
• at least one reservoir containing a fluid, connected to a reactor which contains a reagent capable of reacting exothermically and reversibly with said fluid, said reagent being consumed during said exothermic reaction and being able to be regenerated during the reverse reaction, which can be induced by heating said reactor,
• valve means to regulate the flow of said fluid between said reservoir and said reactor and
• means of heating said reactor capable of regenerating said reactor by inducing said reverse reaction;
• said heating means being capable of being connected to an energy source external to said device and able to be disconnected from said external energy source;
• said device further comprising,
• means of determining the quantity of fluid present in each of said systems that has not reacted;
• means of controlling said valve means that are coupled to said means of determining the quantity of fluid and coupled to the means of heating each of said systems;
• and
• at least one thermally insulated enclosure disposed in such a way that its internal volume can be heated and/or cooled by said systems;
• it is arranged that all of the fluid of each of said systems is contained in said reservoir of said system;
• at least one of said systems is used to bring the temperature of the internal volume of said enclosure to a given preset temperature;
• if this has not already been done, said heating means are connected to said external energy source;
• a) the reactor of one of said systems is heated until complete regeneration, while the other system maintains the temperature of the internal volume of said enclosure at said setpoint temperature;
• b) when the reactor is completely regenerated, said system having the reactor that has just been regenerated is used to maintain the temperature of the internal volume of said enclosure at said setpoint temperature before all the reagent and/or all the fluid of the other system is consumed in said exothermic reaction, and the reactor of the other system, which still contains reagent and said fluid capable of reacting, is heated until its complete regeneration;
• while said connection means are connected to said external source of energy, the aforementioned steps a) and b) are repeated;
• when said heating means are disconnected from said external source of energy, each of said systems is used successively to maintain the temperature of the internal volume of said enclosure at said setpoint temperature.