Electric resistance heating devices – Heating devices – Tank or container type liquid heater
Patent
1995-07-21
1998-03-10
Hoang, Tu B.
Electric resistance heating devices
Heating devices
Tank or container type liquid heater
392451, 392474, 137597, A47J 2700
Patent
active
057271178
DESCRIPTION:
BRIEF SUMMARY
FIELD OF THE INVENTION
The present invention concerns a device for saving water and energy and that may be applied to electric water heaters, for the production of differentiated quantities of constant temperature water, according to the requests.
BACKGROUND OF THE INVENTION
It is already known that the actual electric water heaters have a continuous hydraulic working so that, following the outlet of warm water, new cold water is let in and that lowers the temperature of the water. Of course said already existing water heaters show a considerable energy absorption, which is not corresponding to the saving requests, as they imply the heating of the whole liquid mass contained therein, even if only small quantities of warm water are to be used.
SUMMARY OF THE INVENTION
It is the aim of the present invention to transform a conventional water heater into a water heater also for small daily use, with water quantities all at the same chosen temperature with a consequent saving of water and energy.
The aim set forth is reached by means of the device according to the present invention, that is to be inserted between the connections of warm and cold water, existing on the water heaters, and the ducts toward use, mainly consisting of two electric hydrodeviators for closing and opening the water and air flow, and in an electric hydrovalve for opening and closing the water towards a level measurer provided with two minimum and maximum sensors from a water pump and from a small basin for the recollection of the water, so as to fill up the water heater even partially, according to the requests, and thus transforming an electric water heater also into a water heater for the small daily warm water use, adjusting the requested quantity by means of a level measurer.
The advantages of the device according to the present invention are many and evident: existing water heater, all the warm water inside said water heater may be used without adding new cold water, that would cool down the already heated water, and all the water is at a constant temperature; for all small daily use;
BRIEF DESCRIPTION OF THE DRAWINGS
The present invention will be described more in detail hereinbelow according to the enclosed drawings in which the different elements are shown.
FIG. 1 shows a scheme of a device for saving water and energy according to the present invention, that may be applied to electric water heaters for the production of differentiated quantities of constant temperature water.
FIG. 2 shows the hydraulic scheme of the device according to the present invention, as shown in FIG. 1.
FIGS. 3 and 4 show the hydraulic schemes of the device according to the present invention in its different functioning phases.
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS
FIGS. 2-4 show the invention in three different operating position combinations based on the location of the two electric hydrodeviators 22 and 24 and the electric hydrovalve 26.
The water to be heated in this system enters through a cold water duct 11 passing through a retaining valve 21. Cold water duct 11 is connected to an outlet duct 12 and a warm water tubing 13 through an electric hydrodeviator 22. An electric hydrodeviator 22 controls the flow of water to either run between the cold water duct 11 and the warm water tubing 13 or in a second position provides for a water flow from the warm water tubing 13 to the outlet duct 12.
The warm water tubing 13 has a branch to an electric hydrovalve 26 which provides a connection point to a water level measurer 31 which has two sensors 32 and 33. The first sensor is a maximum sensor 33 to determine when the water level is too high and then restricts the water flow into electric water heater 10 and to also close the electric hydrovalve 25 at this point. A second sensor is a minimum level sensor 32 to interrupt power if the water level becomes too low to prevent the heating element of the electric water heater 10 from burning out.
The outlet duct 12 provides a channel for the water to flow out of the electric water heater 10
REFERENCES:
patent: 5367605 (1994-11-01), Violi
patent: 5383491 (1995-01-01), Heilman
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