| 摘要 |
<p>A fluid tempering system for use with a standard storage tank (1) with a water heater (2,3) includes heat exchanger (15) which is interposed between the outlet means (12) for conveying heated fluid from the storage tank (1) to a distribution system (14) and the cold fluid inlet means (10), so that heat energy is transferred between heated fluid exiting and cold water entering the storage tank (1). Preferably, the heat exchange is complete and water exiting the heat exchanger (15) in both the inlet and outlet conduits (11,13) are of about equal temperature. In order to avoid the water exiting from the water heater (2,3) to the distribution system (14) becoming too tepid, a bypass conduit (21,21') located in either the inlet means (10) or in the outlet means (12) is opened by a thermostat (20) located in the outlet conduit (13). As a safety feature, a safety shut-off valve (25) is located in the outlet conduit (13) before the distribution system (14) to automatically shut-off the conduit (13) where water exiting the system is above a desired maximum temperature. In this system, the water in the water storage tank (1) may be kept at scalding temperatures since it will be tempered on leaving the storage tank (1) before entering the water distribution system (14) to avoid scalding the user. <IMAGE> <IMAGE> <IMAGE></p> |
