FR2836009A1 - Extermination device, especially for termites, uses focused microwave energy to kill insects by thermal shock - Google Patents

Abstract

The device comprises a microwave generator and a reflective cone for focusing the microwave energy. A control system for the power and duration of the microwave energy is also provided. The microwave energy kills the insects by thermal shock.

Description

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 The present invention relates to a means of immediate eradication of harmful insects and wood-boring mainly termites.

These insects dig numerous but discreet galleries and can therefore guarantee an impregnable waterproof habitat.

 Concerning the termite, more than 200 patents with chemical actions have been developed: those with slow diffusion more or less long-lasting, are the most used.

Certain products act by contact and trigger pathogenic attack on the colony. Others by reaction with their own saliva produce toxic gas which will invade the tunnels Unfortunately, these chemical actions, very elaborate quickly felt by these intelligent and gregarious insects, will have only a limited effectiveness, because they are able to recreate a save area, partitioning and saving their eggs; then remain the dormant products, bait strategically placed on their likely routes. But there too the colony being managed intelligently; Abnormal mortality does not escape the "responsible" who hasten to compensate incestuously for the deaths, and will settle in a region virgin of all pollution but often neighboring. It only takes a few individuals saved or survived to re-perpetuate the colony, (according to entomological authors consulted). To remedy this mortality "on credit", it is therefore preferable to apply a more immediate strategy: BURNING in situ.

Electromagnetic burning has nothing to do with a thermal action by conduction, its radiation occupies without exception the entire heterogeneous volume; but only the micro wet masses will be brought to the boil, burned by inter molecular agitation of the "water" molecules, while the surrounding materials will remain lukewarm. This genocidal burning interests individuals and their eggs which, given their very small volume, will burst first, the destruction of the brood must be total. If the horn was kept for several minutes, the surrounding materials bordering on 200 C could not ignite for lack of oxygen
The device essentially comprises a MAGNETRON adjusted on a transmission horn.

This magnetron has a frequency in the range 900 to 2500 mega hz Capable of delivering a power of 1 to 2 Kw The magnetron receives from a suitable control module laTHT (very high voltage) and heating (filt) for the desired times ( defined by experience) for the debugging, the magnetron is shielded in a cube of 8cm side only emerges a small quarter wave antenna which will emit in the pyramid horn The horn in pyramidal trunk is a wave reflector responsible for directing the waves towards the front of the device, the microwaves are confined by reflections on the inclined walls of the sides between 45/550. the larger the opening of the horn, the narrower the lobe, it is necessary for this device to have the most obtuse lobe so that the energy is efficiently distributed at a very short distance. The dimensions of the base around 30x40 cm depend on the wavelength chosen. To avoid leaks after applying the horn to the surface to be treated, it is advisable to fill the lips of the horn with a special silicone rubber seal filled with graphite, which will absorb residual leakage from the side lobes.

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Le schéma fig 1 résume le principe général du dispositif

The diagram fig 1 summarizes the general principle of the device

Claims (1)

Claim 4. Power microwave device for eradication Immediate pest and xylophagous by thermal shock characterized in that it comprises a magnetron adjusted on a reflective horn ensuring the confinement of the wave forward and a power and duration adjustment system