US8276548B2 - Low Cost Tankless Portable Water Heater - Google Patents

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5 to 10 gallons of sizzling water with recovery instances starting from 30 to 60 minutes. Burner apparatus together with a burner, is disposed in an operative relationship with the heat exchanger for heating water flowing through the heat exchanger. An digital direct spark ignition board and a Gas Regulator with an robotically managed Dual Solenoid shut-off valve are provided for operating the burner apparatus based on the necessities of the ANSI Z21.10.3 safety normal. BTU ranges at completely different water circulate charges. This characteristic is achieved using a low cost metal disc thermostat to directly activate the Dual BTU valve without the necessity of an expensive microprocessor management. This is a obligatory safety characteristic often referred to as a Limit Switch. An extra safety feature is achieved by incorporating a Relay and a metallic disc thermostat on the exhaust housing that cause the induced draft blower to remain working after each burn until the exhaust housing reaches a low temperature, thus eliminating thermal stress on the heat exchanger and exhaust components.



FIG. Three is a perspective view of the Alpha Heater blog shown in FIGS. FIG. Four is one other perspective view of the alpha heater price shown in FIGS. FIG. 5 is a functional diagram of the heater shown in FIGS. 10 in accordance with the current invention includes a sealed housing 14 , fabricated from any suitable material such as metallic, which includes an air inlet 18 and a flue outlet 22 . 26 includes a plenum 30 with surround tubing 34 linked to a cold-water inlet 36 and a sizzling water outlet 38 . As shown in FIG. 2 , the cold-water inlet 36 and sizzling water outlet 38 extend outdoors of the sealed housing 14 . Burner apparatus forty two features a burner forty four which is disposed in an operative relationship with the heat exchanger 26 for heating water flowing by means of the tubing 34 . Seventy four additionally screens the flame of the burner 44 verifying the presence of ionization at the location of a spark igniter 76 and promptly shuts off the gasoline circulate by means of the dual solenoid valves 54 .



44 , regulator 48 , and solenoid valves 54 are typical and can be found from several home and international suppliers to be used in traditional fuel appliances. BZB02A0502 with Dual BTU possibility. An exhaust system fifty eight together with a blower 60 with blower motor 62 , blower relay 64 , ignition relay 66 , and time delay change sixty eight (See FIG. 5 ), is provided for inducing draft of air from the air inlet 18 through the heat exchanger 26 and out of the flue outlet 22 . This drastically enhances the efficiency of the burner 44 heat exchanger 26 , and as hereinbefore noted, gives the efficiency advantages relating to condensation supplies stressing and wind resistance. Seventy four with a spark igniter 76 which could also be of any accredited conventional design certified by an applicable company (i.e. CSA, UL or different), is offered for working the burner apparatus forty two and the exhaust system 58 .



80 is offered in the hot water line to offer pressure relief in case of overheating in the new water line 38 in a traditional manner. 84 is disposed within the outlet scorching water line 38 and a solenoid valve 86 , connected to both the anti-freeze thermostat change eighty four and outlet hot water line 38 , gives for drawing water from the recent water outlet line 38 upon receipt of the signal from the anti-freeze thermostatic change which is configured for providing a sign at a preselected temperature. Such anti-freezing thermostatic switches are available from Thermo-Disc, Klixon, Cantherm and other approved suppliers. 86 is disposed outdoors the housing 14 and diverts water through a drain line ninety to the setting or to a recycle tank (not proven). Ninety to the setting or to a recycle tank (not shown). Ninety four interconnected with the ignition board for igniting the burner forty four and heating water to a chosen temperature at which the temperature freeze switch closes the solenoid valve.



98 could also be disposed within the outlet scorching water line 36 and is interconnected with the ignition board and the solenoid valves fifty four to control the burner operation to a lower of the two BTU ranges at a selected water temperature, Alpha Heater blog for instance 45° C. At this temperature, the burner at a decrease BTU provided lowered water heating to maintain a desirable output water temperature in the recent water outlet 38 and faucet 102 . "flow switch" 94 which, in turn, activates the "ignition relay" sixty six that applies energy to the system. After a profitable ignition, the system will instantly begin supplying scorching water. At regular (less than 60 F) the output water temperature starts increasing considerably whenever the circulate is reduced to beneath 1 gal/min. This isn't unusual in an RV the place the water provide could also be small when "dry camping" using a storage tank. If the temperature exceeds 120 F the t-mod switch 98 opens; this causes the dual BTU valve to cut back the gasoline circulate and the water temperature decreases.