Patent ID: 7903958

Claim:
A water heater comprising a machine body having an interior cavity with a top and a bottom, a plurality of quartz heating tubes being installed in said interior cavity, each of said quartz heating tubes having an upper end disposed adjacent to said top of said machine body and a lower end disposed adjacent to said bottom of said machine body, each of said quartz heating tubes having a lower wall portion adjacent said lower end thereof bored with water intakes and an upper wall portion adjacent said upper end thereof bored with vapor vents, each said quartz heating tube including at least a pair of quartz tubes, a first of said pair of quartz tubes having opposing ends of a bore thereof sealed, a second of said pair of quartz tubes being positioned within said bore of said first quartz tube, said second quartz tube a remote-infrared-ray heating member installed therein and connected with an electrode terminal, said machine body being provided with a water intake and a water outlet, said water outlet communicating with a circulating tube in said interior cavity of said machine body, said circulating tube communicating with said vapor vents of said plurality of quartz heating tubes by a plurality of ducts, said circulating tube having a wall thereof bored with a plurality of through holes, said machine body having an exhaust vent formed through a wall thereof, said exhaust vent having a pressure release valve in communication therewith.