US8276548B2 - Low Cost Tankless Portable Water Heater - Google Patents
5 to 10 gallons of sizzling water with recovery occasions ranging from 30 to 60 minutes. Burner apparatus including a burner, is disposed in an operative relationship with the heat exchanger for heating water flowing by the heat exchanger. An digital direct spark ignition board and a Gas Regulator with an mechanically managed Dual Solenoid shut-off valve are provided for operating the burner apparatus in response to the requirements of the ANSI Z21.10.3 safety standard. BTU levels at totally different water move rates. This function is achieved using a low value steel disc thermostat to directly activate the Dual BTU valve without the need of an costly microprocessor control. It is a necessary safety feature often referred to as a Limit Switch. An extra security characteristic is achieved by incorporating a Relay and a metal disc thermostat on the exhaust housing that cause the induced draft blower to remain operating after each burn until the exhaust housing reaches a low temperature, thus eliminating thermal stress on the heat exchanger and exhaust components.
FIG. 3 is a perspective view of the heater shown in FIGS. FIG. Four is one other perspective view of the official Alpha Heater site proven in FIGS. FIG. 5 is a practical diagram of the alpha heater price proven in FIGS. 10 in accordance with the present invention includes a sealed housing 14 , fabricated from any appropriate material akin to steel, which includes an air inlet 18 and a flue outlet 22 . 26 features a plenum 30 with encompass tubing 34 linked to a cold-water inlet 36 and a hot water outlet 38 . As shown in FIG. 2 , the cold-water inlet 36 and scorching water outlet 38 prolong exterior of the sealed housing 14 . Burner apparatus forty two features a burner 44 which is disposed in an operative relationship with the heat exchanger 26 for heating water flowing via the tubing 34 . Seventy four additionally displays the flame of the burner forty four verifying the presence of ionization at the placement of a spark igniter 76 and promptly shuts off the gasoline move by the use of the twin solenoid valves 54 .
Forty four , regulator forty eight , and solenoid valves fifty four are typical and are available from several domestic and international suppliers to be used in conventional gasoline appliances. BZB02A0502 with Dual BTU possibility. An exhaust system fifty eight together with a blower 60 with blower motor sixty two , blower relay 64 , ignition relay 66 , and time delay change 68 (See FIG. 5 ), is supplied for inducing draft of air from the air inlet 18 by the heat exchanger 26 and out of the flue outlet 22 . This greatly enhances the effectivity of the burner forty four heat exchanger 26 , and as hereinbefore famous, gives the performance advantages regarding condensation supplies stressing and wind resistance. Seventy four with a spark igniter 76 which could also be of any authorized conventional design certified by an applicable company (i.e. CSA, UL or different), is provided for operating the burner apparatus forty two and the exhaust system 58 .
80 is supplied in the recent water line to offer strain relief in case of overheating in the recent water line 38 in a conventional method. Eighty four is disposed within the outlet sizzling water line 38 and a solenoid valve 86 , linked to each the anti-freeze thermostat change 84 and outlet scorching water line 38 , official Alpha Heater site gives for drawing water from the recent water outlet line 38 upon receipt of the signal from the anti-freeze thermostatic switch which is configured for providing a signal at a preselected temperature. Such anti-freezing thermostatic switches are available from Thermo-Disc, Klixon, Cantherm and different authorised suppliers. 86 is disposed outside the housing 14 and diverts water through a drain line 90 to the atmosphere or to a recycle tank (not shown). 90 to the atmosphere or to a recycle tank (not shown). 94 interconnected with the ignition board for igniting the burner forty four and heating water to a selected temperature at which the temperature freeze change closes the solenoid valve.
98 could also be disposed in the outlet sizzling water line 36 and is interconnected with the ignition board and the solenoid valves 54 to manage the burner operation to a lower of the 2 BTU ranges at a selected water temperature, for instance 45° C. At this temperature, the burner at a lower BTU supplied lowered water heating to maintain a fascinating output water temperature in the new water outlet 38 and alpha heater price heater discount faucet 102 . "flow switch" 94 which, in turn, activates the "ignition relay" sixty six that applies power to the system. After a successful ignition, the system will immediately start supplying sizzling water. At regular (lower than 60 F) the output water temperature begins growing significantly each time the movement is lowered to under 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 a hundred and twenty F the t-mod switch 98 opens; this causes the twin BTU valve to cut back the gas circulate and the water temperature decreases.