| 摘要 |
<p>An improvement to patent no. PCT/FR 95/01157 relating to a trolley for serving hot and cold meal trays, which trolley provides reheating and refrigeration, has a self-contained store of negative kilocalories and enables negative kilocalorie regeneration, is disclosed. The trolley comprises an insulated housing (2) containing the meal trays (3) and consisting of a permanent refrigeration area (4) and a mixed area (5) for reheating. Refrigeration is provided by two cold-transfer fluid stores (7, 7'), one for the permanent refrigeration area and one for the mixed area, in which the condensers (11) of two heat pipes are immersed, while their respective evaporators (12) enable the two areas to be cooled separately by means of turbines (13, 14) ventilating the negative kilocalories on the meal trays. An electric valve (15) is used to retain the fluid inside the condenser during reheating in the mixed (cold then hot) area. Said trolley is useful for serving meal trays that include one part with hot food and another with cold food and must be kept at a low temperature while the appropriate part of the tray is reheated prior to serving the hot food.</p> |
