US8276548B2 - Low Cost Tankless Portable Water Heater - Google Patents

From Pyra Wiki
Jump to navigation Jump to search


5 to 10 gallons of hot water with restoration occasions 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 via the heat exchanger. An electronic direct spark ignition board and a Gas Regulator Alpha Heater product page with an mechanically controlled Dual Solenoid shut-off valve are provided for operating the burner apparatus according to the necessities of the ANSI Z21.10.Three security customary. BTU levels at completely different water flow rates. This feature is achieved utilizing a low cost steel disc thermostat to straight activate the Dual BTU valve with out the need of an expensive microprocessor management. This is a obligatory security feature also known as a Limit Switch. An additional safety feature is achieved by incorporating a Relay and a steel disc thermostat on the exhaust housing that cause the induced draft blower to remain operating after each burn till the exhaust housing reaches a low temperature, thus eliminating thermal stress on the heat exchanger and exhaust elements.



FIG. 3 is a perspective view of the Alpha Heater product page proven in FIGS. FIG. 4 is one other perspective view of the alpha heater discount shown in FIGS. FIG. 5 is a practical diagram of the alpha heater discount shown in FIGS. 10 in accordance with the current invention includes a sealed housing 14 , fabricated from any suitable materials such as metallic, which incorporates an air inlet 18 and a flue outlet 22 . 26 features a plenum 30 with encompass tubing 34 connected to a cold-water inlet 36 and a hot water outlet 38 . As proven in FIG. 2 , the chilly-water inlet 36 and sizzling water outlet 38 extend exterior 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 way of the tubing 34 . 74 additionally screens the flame of the burner 44 verifying the presence of ionization at the placement of a spark igniter 76 and promptly shuts off the gasoline stream via the twin solenoid valves fifty four .



44 , regulator 48 , and solenoid valves fifty four are standard and are available from a number of domestic and overseas suppliers to be used in conventional fuel appliances. BZB02A0502 with Dual BTU option. An exhaust system fifty eight together with a blower 60 with blower motor 62 , blower relay sixty four , ignition relay sixty six , and time delay swap 68 (See FIG. 5 ), is offered for inducing draft of air from the air inlet 18 through the heat exchanger 26 and out of the flue outlet 22 . This tremendously enhances the efficiency of the burner forty four heat exchanger 26 , and as hereinbefore noted, offers the efficiency benefits referring to condensation materials stressing and wind resistance. Seventy four with a spark igniter 76 which may be of any accepted conventional design certified by an acceptable company (i.e. CSA, UL or different), is offered for working the burner apparatus forty two and the exhaust system 58 .



Eighty is supplied in the hot water line to offer stress relief in case of overheating in the recent water line 38 in a traditional method. Eighty four is disposed in the outlet hot water line 38 and a solenoid valve 86 , connected to both the anti-freeze thermostat change 84 and outlet hot water line 38 , offers for drawing water from the hot 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 by a drain line ninety to the surroundings or to a recycle tank (not proven). 90 to the setting or to a recycle tank (not shown). 94 interconnected with the ignition board for igniting the burner forty four and heating water to a chosen temperature at which the temperature freeze swap closes the solenoid valve.



98 could also be disposed within the outlet hot water line 36 and is interconnected with the ignition board and the solenoid valves fifty four to manage the burner operation to a lower of the 2 BTU ranges at a selected water temperature, for example 45° C. At this temperature, the burner at a decrease BTU offered diminished water heating to maintain a fascinating output water temperature in the new water outlet 38 and faucet 102 . "flow switch" ninety four which, in turn, activates the "ignition relay" sixty six that applies energy to the system. After a successful ignition, the system will instantly begin supplying sizzling water. At normal (lower than 60 F) the output water temperature starts growing considerably whenever the move is decreased to beneath 1 gal/min. This is not unusual in an RV where the water supply may be small when "dry camping" using a storage tank. If the temperature exceeds a hundred and twenty F the t-mod change 98 opens; this causes the twin BTU valve to cut back the fuel movement and the water temperature decreases.