Electrical generator or motor structure – Dynamoelectric – Rotary
Patent
1987-02-06
1988-04-26
Salce, Patrick R.
Electrical generator or motor structure
Dynamoelectric
Rotary
126344, 431255, 310 75R, H02K 718, F23Q 914
Patent
active
047407255
DESCRIPTION:
BRIEF SUMMARY
The present invention relates to a hydraulic microturboalternator for forming more specially a small independent source of electric power providing the functions of automatic lighting, control and regulation of the intake of gas to the burner of a domestic gas-using appliance of the instantaneous gas water-heater kind, not equipped with a permanent pilot light.
The advantage is well known, from the power saving point of view, of developing instantaneous hot-water production appliances using gas, capable of operating without a permanent pilot light; it is sufficient to recall that the power of the pilot light which normally equips any conventional gas water-heater is of the order of 160 W which represents an annual power consumption of about 1,300 KWH.
Besides the power saving, doing away with the traditional permanent pilot light, presents other very interesting aspects; in particular it reassures and comforts an appreciable fraction of potentional customers who would be favorable to the use of gas appliances if they did not involve the permanent presence of a flame in their dwelling and if they could be as simple to use as an electric appliance.
Up to present, these new appliances have an essential requirement in common, which is that of requiring an external source of electric power, while doing away with the permanent pilot light, for accomplishing the normal functions of lighting the gas, of controlling such lighting and finally of controlling and regulating the gas intake to the burner. Three ways of obtaining this source of power external to the appliance are at present known:
The first one is obviously to draw this power from the electric mains of the dwelling in which the appliance is installed. This is the most widely used solution, particularly when it is a question of using gas boilers without permanent pilot lights in which connection to the mains is in any case necessary for feeding the circulation pump; but in the case of appliances of the instantaneous gas water-heater kind, this solution is considered as causing an excessive additional cost of the appliance and it has also the following drawbacks:
On the one hand, it limits the possibilities of geographic implantation of the appliance while seriously increasing the cost of its installation, particularly with respect to safety surrounding the bath in a bathroom because of the need to use a low voltage transformer complying with special fairly strict safety standards.
On the other hand it offsets the advantage of functional independence of a water-heater which normally continues to operate despite possible reductions in the electric power supply.
The second known solution consists in creating a power source by means of a conventional electric battery such as is done for powering traditional portable radios. This second solution of course avoids the drawbacks formed by the excessive costs and installation restrictions, but it is accompanied by other drawbacks which are the following:
The duration of storage and use of a battery cannot be guaranteed and its operating time under normal service conditions depends on the kind or type of battery provided. This constitutes a limitation for those in the distribution network, particularly for wholesalers or foreign importers.
Also, the user will sooner or later, but without the possibility of foreseeing it, experience the moment when his appliance suddenly stops functioning because the battery is exhausted.
The third solution consists in creating this source of electric power in a totally independent way from the available hydraulic energy which represents the necessary flow of a certain amount of water through the appliance whenever the user draws it. This solution is the incorporation of a microturbogenerator in the water circuit of the appliance as described in FR-A-1 215 731.
This solution, whose principal was set forth in the above-mentioned patent has never found industrial applications, because up to the present, it has not been possible to design or perfect a microturboalternator which deliver
REFERENCES:
patent: 3344513 (1967-10-01), Bemmann
patent: 4086508 (1978-04-01), Matsumoto
patent: 4416586 (1983-11-01), Diederich et al.
patent: 4652215 (1987-03-01), Kuroyanagi et al.
Chaffoteaux et Maury
Rebsch D. L.
Salce Patrick R.
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