Optimized Low Frost And Vacuum Lock Free System For Sealed Refrigerated Spaces

Abstract: This invention can be easily incorporated into all domestic, commercial and industrial refrigerated spaces including refrigerators, freezers (top-door or front-door types) and cold rooms and those which are stationary or in moving or transport vehicles. It will alleviate the twin problems of vacuum-lock of the door(s) as well as frost build-up in the sealed refrigerated space. Fig. 1 shows a schematic of an exemplary application of the new system to a horizontal top-door freezer. Ambient air (100) flows through a desiccant chamber (101), wherein the desiccant is regenerated using heat transferred to it from the compressor discharge tube (102). Desiccant chamber outlet air flows through non-return valve (105) through one or more tubes (105) into one or more qualified locations (107, 108) of the refrigerated space (109). A heat rejection section (106) in the path of the air after the desiccant chamber optimizes the temperature of dry air entering the cool zone.

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