Method and device for liberating a fragrant or disinfectant substance
First Claim
1. A method for dispersing a substance, in particular a fragrant or disinfectant substance, in a volume of air, in which method a volume of air is made to flow inside a conduit (1) and a fragrant or disinfectant substance is liberated inside the conduit by positioning a cylinder (5) containing the substance to be dispersed and a compressed propellant gas outside the conduit (1), and by expanding the propellant gas so as to inject the substance inside the conduit, wherein injection of the substance is controlled as a function of an indicated value of the pressure (P11) of the propellant gas in the cylinder and of an indicated value of the flow rate (Q) of the air passing through the conduit.
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Accused Products
Abstract
A method and apparatus for dispersing a substance, in particular a fragrant or disinfectant substance, into a volume of air comprises a first step of circulating a volume of air inside a conduit and a second step of liberating the substance into the conduit. Circulation of the volume of air ensures ventilation for example of a vehicle, a restaurant, a cinema, or furthermore, a hospital. The substance liberated into the conduit is dispersed in the volume of air by forced convection and leads to a perfumed environment or to air containing an active disinfectant principle. A cylinder is positioned outside the conduit containing the substance to be dispersed and a compressed propellant gas, and the propellant gas is expanded so as to inject the substance into the conduit.
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Citations
21 Claims
- 1. A method for dispersing a substance, in particular a fragrant or disinfectant substance, in a volume of air, in which method a volume of air is made to flow inside a conduit (1) and a fragrant or disinfectant substance is liberated inside the conduit by positioning a cylinder (5) containing the substance to be dispersed and a compressed propellant gas outside the conduit (1), and by expanding the propellant gas so as to inject the substance inside the conduit, wherein injection of the substance is controlled as a function of an indicated value of the pressure (P11) of the propellant gas in the cylinder and of an indicated value of the flow rate (Q) of the air passing through the conduit.
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13. A device for liberating a substance, in particular a fragrant or disinfectant substance, into a volume of air flowing in a conduit (1) comprising an injection pipe (3) mounted inside the conduit, an external cylinder (5) containing the substance to be dispersed together with a propellant gas under pressure, and a valve (7) mounted on a communicating connection (9) between the cylinder and the injection pipe, the propellant gas expanding on opening the valve so as to convey a quantity of the substance to be dispersed from the cylinder into the conduit via the injection pipe, it additionally including a pressure sensor (11) determining the pressure in the cylinder and a flow rate sensor (13) determining the flow rate of the air passing through the conduit.
Specification