FR2608349A1 - Chauff' 2000. Apparatus for microwave heating without fluid circulation - Google Patents

Abstract

The invention relates to a microwave boiler device supplied with electrical current, characterised in that a microwave enclosure is converted into a central heating boiler. The heater body is a sealed metal case which allows no microwave leakages and contains no circulating fluid. The walls of the heater body are lined with a hydrating adhesive mastic which advantageously replaces the fluids and their circulation system which are thus eliminated.

Description

 The invention presented here relates to an individual application for heating, either residential premises or larger volumes, such as swimming pool heating, conventional central heating installation, etc.

 The system used is a microwave energy source, ie a device emitting high frequency electromagnetic waves, in the authorized band (2450 MHZ). The model used here is a magnetron powered by household electricity.

 These microwaves are waves close to those emitted by radars. They propagate in the same way, can pass through the air, and are only stopped by the metal that reflects them. It will therefore be understood that this kind of bombardment occurring inside a sealed metal container is reflected on the surfaces to infinity as long as the emission takes place.

 During this bombardment, these very rapid changes of direction, cause friction and are the cause of overheating, the cycle being for each molecule emitted 2450 million movements per second.

 The use of microwave emitters, magnetron type is currently applied in the culinary field, for cooking, thawing or heating; but requires the presence of water to accumulate @alories released by the magnetron.

 This water is found latent in foodstuffs, or had previously been used with a fairly complicated circulatory system. (It can also be replaced by any fluid.

 The advantage of microwaves is that they heat liquids very quickly, but it seems obvious that the smaller the amount of water, the faster the heating.

 In the system recommended here, we eliminate any circulation or any fluid, the whole being replaced by a solution based on a semi-flexible sealant, impregnated with a moisturizing material, and coated along the walls of the exchanger .

 The microwaves emitted by the magnetron having caused a circulation (The bombardment explained above) of the molecules in suspension, continue after the power cut for a time of the order of a minute, which allows a very reduction significant power consumption.

 The first experimented device, which we are talking about here, was equipped with a magnetron whose consumption is 500 Watts, the operation being divided into three, we have a third of a minute of operation, and two thirds of a minute of stop . This brings consumption down to 500 Watts: 3, or around 170 Watts an hour.

 The equipment of the transmitter assembly is composed of an input transformer n 1 supplied by the ordinary 220 sector (50 Hz), transforming it into high voltage current (2450 Volts approximately) necessary for the functioning of the magnetron, a capacitor n 2, a diode bridge n @ making the voltage negative, and a fan n 3 in order to avoid abnormal heating of the magnetron n 4 itself and of the transformer n 1.

 Of course, in addition to the arrival of the sector includes a switch, a fuse. and an anti-parasite filter.

 It is necessary to incorporate an electronic timer, it can be cam, in order to cut the power supply of the magnetron, as mentioned above (one third, two thirds).

This timer can be programmable in time, which would allow start-up in the event of absence. It is possible to add a thermostat.

All of these elements are fixed on a plate n 8 in a base n 9, the head of the magnetron n 4 penetrating directly into the exchanger box n 6, which eliminates any possibility of leakage of waves.
The plate n 8 is integral with the exchanger n 6.

 The first device tested was intended for a heater, and therefore has a certain resemblance to a central heating radiator.

 The carcasses, tanks and all the elements constituting the exterior of the appliance must be made of metal. Metals are impermeable to microwaves. There are currently plastics which are also impermeable to microwaves, but in the current state of the art, the cost price would be too high.

 The application for a central heating boiler is simplified. It is enough to coat the interior of the boiler with the amalgam mentioned above, and to seal the exterior doors to avoid microwave leaks. A plate of the same type heats the pipes through our coating.

 The circulation of water in the pipes is ensured by the circulator existing in the device itself.

 For the heating of a swimming pool, it is recommended to use a metal cylinder in which one makes a coil of pipes, which can be of copper, also coated and which will transmit the heating by the same process.

Claims (8)

 1) Microwave boiler device powered by electric current, characterized by the fact of transforming a microwave enclosure into a central heating boiler.  2) Device according to claim 1, characterized in that the heating body is a sealed metal box which does not allow microwave leaks.  3) Device according to claim 1 and 2, characterized in that the device does not contain circulating fluid.  4) Device according to claim 1 and 2, characterized in that the walls of the heating body are coated with a hydrating adhesive sealant, which advantageously replaces the fluids and their circulation system which are thus eliminated.  5) Device according to claim 1 and 2, characterized in that the heating body is bolted to a base containing the operating elements of a conventional microwave appliance.  6) Device according to claim 4, characterized in that the transmitter itself being introduced into the heating body, cancels any possibility of microwave leaks.  7) Device according to claim 1 making the boiler economical by the use of a time delay cutting the emission of microwaves to 1/3 of the real operating time.  8) Device according to claim 1, which gives ease of connection and use reduced to a minimum since it requires only a single 220 V light line.