| 摘要 |
<p>A small, inexpensive water heater is disclosed, of the type which uses an atmospheric burner to heat the water, together with a method for making the same from lightweight sheet metal material. According to the method, an elongated heater tube having open and closed ends thereon, is inserted into a liquid container having an opening in the wall thereof. The open end portion of the tube is connected to the wall of the container about the opening so that the opening is closed to the interior of the container while the bore of the tube is placed in communication with the exterior of the container therethrough. The closed end portion of the tube is extended below the operational level of liquid in the container so that the bore of the tube forms an elongated gas flow chamber for heating the liquid therein. Moreover, a baffle is mounted in the bore of the tube so as to separate the upper and lower portions of the chamber for a substantial distance along the length of the tube from the open end thereof. A fuel burner is interconnected with the lower portion of the chamber adjacent the open end portion of the tube so that hot gases can be fed along the bottom of the chamber in the direction of the closed end portion of the tube. A flue is interconnected with the open end portion of the tube adjacent the upper portion of the chamber so that the hot gases are withdrawn along the top of the chamber in the direction of the open end portion of the tube.</p> |
