Reivindicaciones

1. Domestic refrigerator cooled by the Peltier effect, characterized in that the enclosure to be cooled is formed by one or two thermally insulated enclosures, where air circulates by natural convection, in which heat entering the enclosures is removed by evaporation of a liquid, that could be water, which condenses at the top where the cold faces of the Peltier pellets are installed, which pump the heat to the hot faces and is removed through two thermosyphons. 2. Domestic refrigerator cooled by the Peltier effect according to claim 1, characterized in that the heat from the pellets' hot faces is removed by evaporation of a fluid therein, which condenses in an ambient air exchanger arranged in a high position with reqard to them and the condensed fluid returns by gravity. 3. Domestic refrigerator cooled by the Peltier effect according to claim 1, characterized in that the heat from the pellets hot faces is removed by evaporation of a fluid therein, which condenses in exchangers located below the cold source, and the liquid phases move by gravity and the gaseous phases return by natural convention. 4. Domestic refrigerator cooled by the Peltier effect, characterized by being formed by two thermally insulated compartments cooled by the Peltier effect, with four thermosyphons, two as that indicated in claim 2 and two as those indicated in claim 3. 5. Domestic refrigerator cooled by the Peltier effect according to claim 4, characterized by being formed by three phase change accumulators, one, the external one, vapour-liquid, and two liquid-solid, at respective phase change temperatures, higher than the average of the outside environment and lower than the average desired in the unit's two enclosures, i.e., for refrigerated products and frozen products. 6. Domestic refrigerators cooled by the Peltier effect according to claims 1, 2, 3, 4 and 5, characterized in that with the elements indicated in the five which use water as the refrigerating fluid with suitable degrees of vacuum, so evaporation occurs at the temperatures desired in each circuit. 7. Domestic refrigerators with the elements as indicated in the foregoing claims or where one of the thermotyphons is replaced by a pump for driving or by a fan for the exchangers in the air area. 8. Domestic refrigerator cooled by the Peltier effect, with an enclosure to be cooled formed by one or two thermally insulated enclosures (1,9), where air circulates by natural convection, in which heat entering the enclosures is removed by evaporation of a liquid, characterized in that at least one enclosure (9) to be cooled is cooled by two cascade coupled units (3, 4, 5; 6, 7, 8), each unit comprising two thermosyphons (3, 5; 6, 8) separated by Peltier effect pellets (4; 7), one of the thermosyphons (5, 8) of each unit being arranged for condensation of a liquid housed therein at a cold face of the Peltier effect pellets and the other thermosyphon (3, 6) of each unit being arranged for evaporation of a liquid housed therein at a hot face of the Peltier effect pellets, wherein each termosyphon includes a first circuit for flow of evaporated liquid to an area where the liquid is to be condensed, and a second circuit for returning condensed liquid to an area where it is to be evaporated, said second circuit not being the same as the first circuit. 9. Domestic refrigerator cooled by the Peltier effect according to claim 1, characterized in that in one of the cascade coupled units (3, 4, 5), the heat from the pellets' (4) hot faces is arranged to be removed by evaporation of a fluid, which is arranged to condense in an ambient air exchanger arranged in a high position with regard to the pellets, the condensed fluid being arranged to return by gravity. 10. Domestic refrigerator cooled by the Peltier effect according to any of the preceding claims, characterized in that the thermosyphons contain water as the refrigerating fluid with suitable degrees of vacuum, whereby evaporation occurs at the temperatures desired in each termosyphon.