公开(公告)号：US5293446A

公开(公告)日：1994-03-08

申请号：US705746

申请日：1991-05-28

申请人： George G. Owens ,  Ernest D. Brinson

发明人： George G. Owens ,  Ernest D. Brinson

IPC分类号： F24H1/20 ,  F24H9/20 ,  F28F1/06 ,  H05B3/82 ,  H05B1/02

CPC分类号： F28F1/06 ,  F24H1/202 ,  F24H9/2021 ,  H05B3/82

摘要： A two-stage electric water heater which utilizes a centrally located, vertically-oriented flue pipe and multiple heating elements extending through selected lengths of copper tubing positioned in the flue pipe to heat the water surrounding the flue pipe. In a preferred embodiment a two-stage thermostat operates to selectively energize less than the total number of heating elements at a high energy level in order to raise the water temperature quickly from room temperature to a desired level. A single-stage thermostat may then be used to maintain the water at this temperature during normal operation. In another preferred embodiment the copper tubes through which the heating elements extend are dimpled or crimped into contact with the heating elements to increase heat transfer.

摘要翻译： 一种两级电热水器，其利用位于中心的垂直取向的烟道管和多个加热元件，其延伸穿过位于烟道中的选定长度的铜管，以加热烟道管周围的水。 在优选实施例中，两级恒温器操作以在高能量水平下选择性地激励小于加热元件的总数量，以便将水温从室温快速升高到期望水平。 然后可以使用单级恒温器在正常操作期间将水保持在该温度。 在另一个优选实施例中，加热元件延伸穿过的铜管与加热元件相互凹凸或卷曲以增加热传递。