Patent ID: 8372337

Claim:
A method of disinfecting ground, using a device in the form of a trailed mobile trailer having (a) a generator comprising a compression chamber ( 11 ) in which atmospheric air, having been aspirated and compressed by a piston ( 2 ), is raised to a pressure that will increase the air's temperature; into which chamber ( 11 ) water is then injected when the compressed air temperature is high enough to vaporize the amount of water injected; the compressed and humidified hot air then being partially expanded to drive back a piston ( 7 ) in a cylinder ( 6 ) so as to reach a service pressure and temperature, in order to obtain the compressed and humidified hot air ready to be discharged through an exhaust ( 16 ) and injected into the ground as the piston ( 7 ) rises back up, (b) a chassis configured to be placed on the ground and connected to the generator by pipes, and (c) tines configured to penetrate the ground and diffuse the compressed and humidified hot air, the method using a thermodynamic cycle comprising the sequential steps of: aspiration of the atmospheric air; producing the compressed hot air by compressing the aspired atmospheric air to a higher temperature in a positive-displacement machine defined by the device; humidifying the compressed hot air thus produced by injecting water into the compressed hot air and vaporization of the injected water in the compressed hot air; and injecting the compressed hot air thus humidified into the ground by polytropic partial expansion with work to the service pressure and temperature with exhaustion and injection into the ground.