Electric water heater
AssigneeGlobal Heating Solutions, Inc.
InventorCarlisle Thweatt, Jr.
Life of this patent
Estimating the term…
Abstract
An electrical heater for fluid including a generally tubular housing have a wall portion made of a titanium material, and an elongated electrical heating element having electrical connectors on opposite ends thereof extending through the wall portion. The electrical heating element has an outer sheath made of a titanium material, and an inner sheath made of a stainless steel material. The electrical heating element has an electrical resistance line disposed within the inner sheath and connected to the electrical connectors at opposite ends thereof. The electrical heating element includes a dielectric material disposed within the inner sheath around the electrical resistance line to facilitate heat transfer from the electrical resistance line to the inner sheath.
Claims20
A method of fabricating an electrical heating element, comprising:
- providing an electrical resistance heating line;
- placing the electrical resistance heating line in a stainless steel sheath;
- positioning dielectric powder around the electrical resistance heating line;
- placing a titanium sheath around the stainless steel sheath;
- fixing the titanium sheath relative to the stainless steel sheath;
- compacting the titanium and stainless steel sheaths to compress the dielectric powder around the heating line to tightly fit the outer titanium sheath around the stainless steel inner sheath.
An electrical heater for fluid, comprising:
- a housing having a wall portion defining a cavity and having a fluid inlet and a fluid outlet in fluid communication with the cavity to provide fluid flow through the cavity;
- and
- an elongated electrical heating element having opposite end portions extending through the wall portion and including electrical connectors outside of the housing, the electrical heating element having an outer sheath made of a titanium material, and an inner sheath made of a stainless steel material, the titanium outer sheath being tightly fitted around the stainless steel inner sheath, the electrical heating element further including an elongated electrical resistance line disposed within the inner sheath and connected to the electrical connectors at opposite ends of the elongated electrical resistance line, the electrical heating element including a substantially non-electrically conductive material disposed within the inner sheath around the electrical resistance line to facilitate heat transfer from the electrical resistance line to the inner sheath, the elongated electrical heating element including at least one U-shaped bend.
Dependencies are inferred from the claim text.