| 摘要 |
A heating assembly for heating a liquid storage tank includes a heat exchanger tank supported in one wall of the storage tank to extend into the storage tank in contact with liquid stored therein. The heat exchanger tank contains a heat exchanger fluid therein which is heated by an electrical resistance-type heating element extending through the heat exchanger tank whereby heat is only transferred to the liquid in the storage tank through the heat exchanger fluid. . A controller actuates the heating element to maintain temperature of the heat exchanger fluid between upper and lower temperature limits. |
