Classifications

• • A—HUMAN NECESSITIES
  • A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
  • A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
  • A61L9/00—Disinfection, sterilisation or deodorisation of air
  • A61L9/14—Disinfection, sterilisation or deodorisation of air using sprayed or atomised substances including air-liquid contact processes
• • A—HUMAN NECESSITIES
  • A01—AGRICULTURE; FORESTRY; ANIMAL HUSBANDRY; HUNTING; TRAPPING; FISHING
  • A01M—CATCHING, TRAPPING OR SCARING OF ANIMALS; APPARATUS FOR THE DESTRUCTION OF NOXIOUS ANIMALS OR NOXIOUS PLANTS
  • A01M13/00—Fumigators; Apparatus for distributing gases
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F3/00—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems
  • F24F3/12—Air-conditioning systems in which conditioned primary air is supplied from one or more central stations to distributing units in the rooms or spaces where it may receive secondary treatment; Apparatus specially designed for such systems characterised by the treatment of the air otherwise than by heating and cooling
• • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
  • F24—HEATING; RANGES; VENTILATING
  • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
  • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
  • F24F8/50—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by odorisation

Definitions

• the present invention relates to a device for fumigating a fluid product such as deodorants, room fragrances, insecticides, etc.
• a fluid product such as deodorants, room fragrances, insecticides, etc.
• This device will find its application in the treatment of premises such as public places, offices or else hotels and others.
• the fluid products of the aforementioned type are usually distributed in the form of fine droplets using a spray pump or an aerosol can.
• the droplets remain temporarily suspended in the air, but tend to fall due to their mass, because these droplets, as their name suggests, constitute a liquid phase of the product and not a gaseous phase.
• This type of fluid product distribution is particularly well suited to spot treatment, since a large amount of product can be concentrated in a small volume.
• 060 discloses a device in which a manual pump is actuated by electromechanical means to spray on a metal surface a finely sprayed jet of fluid substance.
• the metal surface is heated to a temperature higher than the vaporization temperature of the fluid substance, so that said fluid substance is vaporized instantaneously in gaseous form, therefore with a change of state.
• this type of product distribution will be called fumigation. Indeed, as the fluid substance goes into the gas phase, its dispersion in the atmosphere is much better than with aerosols which produce droplets in suspension in the air.
• a pump actuated by electromagnetic means, a retractable heating element, and a microprocessor which controls the pump at a predetermined time interval when the heating element is in look at the pump spray nozzle.
• the heating element comprises a housing open on its upper and lower faces and containing a thermally conductive plate extending perpendicular to the direction of the spray of sprayed product. The plate is in thermal contact with a resistor. The product, once fragmented in the gaseous state, escapes through the upper face of the housing, while air enters the housing through the lower face.
• this fumigation device of the prior art plans to emit one or more consecutive doses of product at fixed predetermined time intervals, which leads, because the air in a volume given is not static but is subjected to currents of variable intensity, to variations in the density of gaseous product distributed as a function of time, and therefore the odor that the product gives off is perceived more or less. less pronounced. These variations can lead to excess product concentration at certain times and vice versa, an almost total disappearance of the odor at other times.
• An object of the present invention is to provide a fumigation device capable of maintaining a constant "level" of odor in the room to be treated, although this room is subject to aerial disturbances.
• the present invention relates to a device for fumigating a sprayable fluid for the treatment of premises, comprising: - at least one reservoir containing the fluid to be sprayed, spraying means provided with a nozzle spraying, a heated wall facing the spray nozzle for receiving said product sprayed by the spraying means, said heated wall having a temperature higher than the vaporization temperature of said fluid product, said heated wall being in communication with the atmosphere by an upper opening for discharging said product in the gaseous state, a microprocessor for controlling the actuation of the spraying means, and controlling the temperature of the heated wall, characterized in that the microprocessor is programmed to control the actuation of the means of spraying automatically at time intervals determined according to a representative value of the air circulation inside the rooms to be treated.
• the quantity of gaseous product distributed is perfectly regulated as a function of the renewal of the air in the room, which has the consequence of expelling a part of the gaseous product outwards, hence a variation in product density. It is thus ensured that for any volume of new air injected into the room, a proportional amount of gaseous product will be added to it. We thus manage to maintain a constant odor in the room.
• said value representative of the air circulation is introduced into the microprocessor program as a set value.
• detection means are provided for measuring said value representative of air circulation at predetermined time intervals, electronic circuitry being provided for successively introducing said values thus measured in the microprocessor program to adapt in continuous the quantity of fluid dispensed.
• the upper opening is connected upstream of a turbine of an air conditioning system for aspirating the product in the gaseous state, an a Vogellic probe being arranged downstream of the turbine to measure said representative value under the form of an air flow at the outlet of the turbine.
• a depression producing an aspiration which is used to extract the gaseous product from the enclosure.
• the invention provides, in a particularly advantageous embodiment, that said spraying means comprise a water pump in fluid communication with the spray nozzle to clean the latter, as well as the wall heated after spraying the fluid product.
• said spraying means comprise a water pump in fluid communication with the spray nozzle to clean the latter, as well as the wall heated after spraying the fluid product.
• this water supply can also be used to humidify the room to be treated.
• cleaning means adapted to spray under pressure a heated cleaning agent in vaporized form against said wall.
• pressure cleaning means can be combined with the nozzle rinsing means.
• the cleaning agent which can be pure water or a solution of water and hydrogen peroxide, makes it possible to carry out a real pickling of the wall. This is made possible because the cleaning agent is dispensed under pressure and at a high temperature (110 to 150 ° C). It is in reality in a vaporized form under pressure that the cleaning agent is projected against the wall. The impact of high temperature steam against the wall allows for quick and efficient pickling.
• the cleaning agent contains a disinfectant or a bacteriostatic substance such as hydrogen peroxide, this also makes it possible to remove any bacterial trace on the wall, thus perfect cleaning is carried out.
• the cleaning means comprise a chamber having an inlet and an outlet and heating means for heating said chamber.
• the inlet of said chamber is provided with non-return valve means and the outlet from said chamber is provided with pressure relief valve means. Overheating the cleaning agent increases its pressure inside the chamber, which will cause it to spray out of the chamber. With a pressure relief valve calibrated at approximately 5 bars, good pressure projection at a temperature of approximately 130 ° is obtained.
• the chamber has a shape substantially horseshoe-shaped, the heating means being an electrical resistance extending along the chamber.
• the spraying means comprise a spraying pump actuated by mechanical means.
• a spraying device as described in the document FR-2 706 330 mentioned above.
• the dose of fluid is put under pressure in a pump chamber before escaping through a conventional nozzle which allows the dispersion of fluid into fine droplets.
• the spraying means comprise an air pump and at least one fluid product pump, said spray nozzle being a mixing nozzle at the level of which the fluid product is brought into the flow of air created by the air pump and thus pulverized. This air flow further improves the evacuation of the gaseous product through the upper opening.
• the configuration of the case of the aforementioned document does not cause rapid escape of the product in the gaseous state.
• the gaseous product naturally tends to rise due to the temperature, but this occurs naturally at normal speed.
• the present invention also seeks to remedy the aforementioned drawbacks of the prior art by defining an improved device, particularly in terms of its fumigation system, that is to say of change of state. Another object of the invention is also to obtain a simple and clean device allowing the rapid escape of the gaseous product.
• said device comprises a closed enclosure with the exception of a lower lateral opening and an upper opening, said spray nozzle being positioned opposite said lower lateral opening, the interior of said enclosure is at least partially heated, at least opposite said lower lateral opening, to a temperature above the vaporization temperature of the fluid product and thus defines said heated wall, an air supply passage being provided at the level of said lower lateral opening to create a current of air inside the enclosure, favoring the escape of said product in the gaseous state through the upper opening .
• Combining the opening for the spray nozzle and the opening for the air inlet has many advantages. First, the enclosure is perfectly airtight at the bottom; no product residue can escape. Secondly, the air flow does not disturb the spray of sprayed product since it comes from the same direction.
• the air stream allows constant cooling of the spray nozzle which is subjected to the heat which reigns in the enclosure.
• the air stream does not cool the heated wall of the enclosure which is opposite. nozzle, since it enters the enclosure diametrically opposite.
• the air flow is better able to enter the enclosure at the level of the spray nozzle, due to the air call created around the spray of sprayed product.
• the air flow entering the enclosure through the side opening allows for even better extraction.
• the lower opening is located laterally. Although this does not offer any particular advantage, it can still be envisaged to locate this lower opening in the bottom of the enclosure.
• the upper opening has a section smaller than that of the air supply passage.
• a draft effect is generated inside the enclosure which increases the speed of escape of the gaseous product at the level of the upper opening. It is a sort of Venturi effect which allows the gaseous product at the outlet of the device to be expelled in an accelerated manner. This allows faster dispersion of gas molecules in the air by vigorous initial mixing.
• the air supply passage is produced by a space defined between the lower lateral opening and the spray nozzle positioned in the latter away from contact.
• the air flow thus enters the enclosure uniformly around the spray nozzle.
• the thermodynamic disturbance generated by the air flow inside the enclosure then influences the internal walls of the enclosure symmetrically with respect to the spray of sprayed product.
• the enclosure is made of a thermally conductive material.
• the enclosure is heated by means of a thermostatic jacket which surrounds the enclosure for the most part to maintain substantially the entire enclosure at a temperature above the temperature of vaporization of the fluid product.
• the enclosure has smooth polished internal walls.
• the enclosure has sandblasted internal walls to increase the contact surface with the pulverized fluid product, thus imparting a catalytic effect. This ensures that the entire enclosure is at the correct temperature and that no residue will form. The enclosure is thus kept perfectly clean.
• the dose of sprayed product, then "fumigated" does not vary, it is only the temporal distribution by modification of the time interval between the actuation periods of the spraying means which makes it possible to regulate the quantity of product dispensed as a function air circulation in the volume to be treated.
• means are provided for increasing the air flow inside the enclosure.
• at least one fan is provided near the upper opening to place the latter in depression and thus facilitate the extraction of the gaseous product from the enclosure. It is a simple and inexpensive method which can be used in isolated fumigation devices.
• said fumigation device is arranged in a cabinet provided with a door and means for detecting the opening of said door.
• detection means are provided in association with the microprocessor to monitor the proper functioning of the fumigation device and put the latter in a safety stop in the event of a malfunction.
• Figure 1 is a schematic representation of a first embodiment of a fumigation device according to the present invention
• Figure 2 is an enlarged plan view of the spray nozzle used in the device of Figure 1
• - Figure 3 is a sectional view of a second embodiment of a fumigation device according to the present invention
• Figure 4 is a plan view of the pressure cleaning means according to the present invention
• FIG. 5 is a schematic representation of the fumigation device of FIG. 1 integrating the cleaning means of FIG. 4.
• the devices of the present invention are intended for the treatment of premises by fumigation of odoriferous or disinfectant products.
• odoriferous products mention may be made of air fresheners and home fragrances.
• Another type of analogous product provides a reverse olfactory result, that is to say the removal of any odor.
• Fragrances, based on any odoriferous product are active organic substances in low concentration in the air.
• the fragrances are not very water-soluble, hence the choice of solubilizer. Polyethoxylated with 20-30% water can be used in the formulation.
• the two embodiments of the devices described below both include spraying means, fumigation means and control means.
• the spraying means comprise a product pump PP and an air pump PA connected by conduits 41 and 40 respectively to a mixing spray nozzle 3, an enlarged representation of which is given with reference to FIG. 2.
• a non-return valve C1 is mounted in series on the duct 41 to ensure that the said duct is always filled with product.
• the product pump PP is on the other hand connected by a conduit 42 to a solenoid valve EV, itself connected by respective conduits 45 and 46 to product reservoirs RP1 and RP2.
• the EV solenoid valve makes it possible to selectively draw from one of the two product reservoirs RP1, RP2 according to their level.
• the air pump PA delivers an air flow at the level of the mixing nozzle 3 with a pressure of approximately 150 mbar.
• a pressure value can be supplied by a linear diaphragm pump available on the market for example by the company WISA which markets a pump under the designation LIMA674.
• Such a pump comprises two pump chambers each provided with a deformable membrane which are actuated in phase opposition to obtain a constant air flow regime. This pump has been shown to be particularly well suited for the present application.
• any other air supply means having similar or closely related qualities can be used in the context of the invention, for example a compressor.
• the air flow must be sufficient to spray the product without creating excessive air agitation (we will see later why such a condition is required).
• the product pump PP As for the product pump PP, it supplies precise doses of product almost drip at the level of the mixing nozzle 3. The drops of product are brought into the air flow created by the air pump PA, which causes them to be sprayed into very fine droplets.
• a LIMA diaphragm pump WISA D100 available from the company WISA provides good results.
• the PP product pump delivers constant doses of product at will. To increase the quantity of sprayed product, one acts on the frequency of emission of the doses and not on the dose itself which is defined by the volume of a pump chamber.
• the fumigation means essentially comprise a closed enclosure 1 with the exception of a lower lateral opening 1 1 and an upper opening 12.
• the enclosure 1 is preferably cylindrical and is in the form of a bottle provided with 'a narrowed neck (upper opening 12) and a lateral hole (lateral opening 1 1).
• the enclosure has a sealed bottom 13, a cylindrical body 15 and a neck 14 terminated by the upper opening 12.
• a thermostatic jacket 2 surrounds the enclosure for the most part, in particular at the level of its cylindrical body 15 to l except for the lateral opening 11.
• the thermostatic jacket 2 is electrically supplied so as to bring the internal walls of the enclosure to a temperature higher than the product vaporization temperature, which is necessary for its fumigation.
• the enclosure is made from a thermally conductive material such as a metal or a conductive ceramic, so that the entire enclosure is at the required temperature.
• a temperature of 300 ° C is sufficient.
• the internal walls of the enclosure are finely sanded to obtain a catalytic effect by increasing the contact surface with the sprayed product.
• the internal walls are, on the contrary, extremely smooth so as to impart a mirror effect. Smooth walls will be preferred for the distribution of particularly volatile products which do not tend to adhere to the walls.
• finely sanded walls are used when the doses of product distributed are large. Sandblasting makes it possible to reduce the size of the enclosure without reducing the contact surface.
• the mixing spray nozzle 3 is positioned opposite the lower lateral opening 1 1 so that the spray of sprayed product is projected inside the enclosure. According to the invention, the nozzle does not close the lateral opening 11 so that an air supply passage 31 is defined by which a stream of air can penetrate inside the enclosure 1. In the embodiment shown in Figure 1, the side opening 1 1 and the nozzle are round. The passage 31 is then delimited by the annular space which exists between the lateral opening 1 1 and the nozzle 3. Referring now to FIG. 2, one sees in an enlarged manner the mixing nozzle used in the device of FIG.
• the nozzle 3 comprises a nozzle body 30 with three inlets to which the non-return valve C1 of the product pump PP, the non-return valve C2 of the water pump PE and the duct 40 of the air pump PPA are respectively connected. via a swivel fitting 430.
• the nozzle body incorporates three internal supply channels (not visible). The two channels corresponding to the PP product and PE water pumps open into the nozzle 330, while the channel corresponding to the PA air pump opens at the air nozzle 320.
• the product or the water is brought in practically without pressure in the air flow which immediately sprays it. Thanks to this nozzle and the associated pumps, it is possible to deliver doses of product with an accuracy of the order of 10 microliters.
• the current of air entering the enclosure has the effect of promoting the escape of the product reduced to the gaseous state by the upper opening 12 which acts as a chimney.
• the gaseous product of course already tends to rise due to its high temperature and the temperature prevailing in the enclosure.
• the exhaust of the gas is improved.
• the latter present in the form of dry smoke which does not tend to fall to the ground, but which on the contrary disperses very easily in the air.
• the upper opening 12 has a smaller section than that of the air supply passage 31. This results in an acceleration of the gaseous product at the outlet of the upper opening by a Venturi effect. .
• a engorgement of the particles of gaseous product is created at the level of the neck 14, but since the flow rate remains almost constant, the particles are accelerated so that the exhaust takes place in the form of an active smoke cloud which is quickly expelled during the enclosure.
• This configuration of the enclosure has many advantages. The enclosure is closed in its lower part 13 so that no flow of product residue can take place. This is all the more impossible since the enclosure is almost entirely heated.
• the lateral opening 1 1 at which the mixing nozzle 3 is placed is positioned with respect to the thermostatic jacket 2 so that the entire jet of sprayed product is projected onto an internal wall of the 'enclosure covered by the jacket 2. This ensures that the sprayed product comes into contact with a surface at an adequate temperature.
• the fact that the air supply passage 31 surrounds the nozzle allows, on the one hand to cool the latter because it is directly subjected to the heat of the enclosure, and on the other hand, to not cool the internal wall of the enclosure located opposite the lateral opening 1 1 and onto which the major part of the sprayed product is sprayed.
• the incoming air stream disturbs the jet of sprayed product uniformly, and not laterally or transversely, as would be the case if the feed passage 31 was located at another location.
• the air flow generated by the air pump PA is added to the air stream to improve the exhaust of the gaseous product. This is why these spraying means are preferred.
• the air flow must not be too great, otherwise it would risk cooling the internal wall of the enclosure opposite the nozzle 3, which would make any fumigation impossible.
• the air pump must be chosen and optimally adjusted to spray the fluid supplied by the PP product pump as finely as possible while avoiding cooling the enclosure.
• one or more fans may be provided disposed near said upper opening and directed away from said opening so as to place the latter in depression and thus facilitate the extraction of the gaseous product out of the enclosure. This has the effect of increasing the exhaust speed of the gaseous product which then disperses faster in the air.
• Such an arrangement will be particularly well suited to the case where the device is isolated, that is to say that the upper opening gives directly into the atmosphere.
• Another more practical but particularly advantageous arrangement provides for connecting the upper opening upstream of a turbine of an air conditioning system. Indeed, at this point in the system, there is a vacuum which has the effect of sucking in the outside air. By thus connecting the device, the interior of the enclosure will be vacuumed. In addition to the already existing air flow which allows accelerated escape of the gaseous product, the depression created by the turbine further promotes the extraction of the gaseous product by suction.
• Air conditioning or air conditioning systems offer the advantage of being able to treat all the parts of a building and they are more and more common in buildings such as offices or hotels.
• the device comprises a PE water pump connected, on the one hand to a water tank RE by a supply conduit 44 and, on the other hand, to the mixing nozzle 3 by a conduit 43.
• a non-return valve C2 is mounted in series on the conduit 43 to prevent the water present in the conduit 43 from returning to the PE pump once the latter is deactivated. This ensures that there is always water in the duct 43 and more particularly at the nozzle 3.
• the non-return valve C2 opens, while the valve Cl of product line closes.
• the water supply to the nozzle is used for rinsing as well as for cleaning the enclosure and incidentally makes it possible to humidify the air in the room to be treated.
• the nozzle is supplied with water in place of the fluid product and the air pump PA is actuated. The water is thus sprayed and released in gaseous form.
• Rinsing the nozzle is essential, otherwise it will clog, but cleaning the enclosure is also important, as this eliminates any residue that may eventually form in the enclosure.
• the enclosure is thus kept perfectly clean. To do this, simply activate the PP water pump after each spraying of product from the PP pump.
• the water which is sprayed is added with a bactericide in order to avoid any circulation of bacteria, microbes or other substances capable of reacting with the human organism.
• the water pump PE can be connected by a conduit to a solenoid valve to which is also connected the conduit 41 of the product pump PP.
• the solenoid valve allows to selectively switch between the product pump PP of the water pump PE and is connected to the mixing nozzle 3 by a single conduit.
• the PE water pump must then run for a certain period of time, since the conduit 41 must be emptied of the fluid which has remained there after spraying. This prevents fouling of the mixing nozzle, which prolongs its service life.
• a microprocessor M is provided. connected to each organ by links 51-56.
• the microprocessor can be programmed to control in the following manner. First, it energizes the thermostatic jacket so that it reaches the required temperature, for example 300 ° C. Once this temperature has been reached, the microprocessor controls the actuation of the air pump PA. Then, it controls the actuation of the PP product pump after having checked the state of the EV solenoid valve. If the product reservoir RP1 has reached its minimum level, it controls the tilting of the solenoid valve EV on the reservoir RP2.
• the actuation of the PP product pump signifies the emission of a specific dose or train of doses.
• the microprocessor controls the actuation of the water pump PE while keeping the air pump PA actuated.
• the PE water pump remains active until the mixing nozzle 3 and the enclosure 1 are perfectly cleaned. If the time interval between each dose or product dose train is small, the actuation of the PE water pump can then simply be ordered after the last spraying of product, for example at the end of the evening, before putting into operation. device standby for the night.
• the microprocessor finally controls the cut-off of the power supply of the jacket 2.
• the frequency of doses or trains of doses issued is dependent on the circulation of air in the rooms to be treated, the renewal of air in the rooms, and the nature of the product to be distributed.
• the frequency setpoint can be calculated, as a function of the parameters involved, empirically, by test, or even determined as a function of a significant quantity, for example the instantaneous flow rate of the turbine, in an air conditioning system. air.
• an a Vogellic probe S communicates the value of the air flow rate at the outlet of the turbine to the microprocessor through the link 50.
• the microprocessor determines the frequency of the PP product pump.
• the quantity of gaseous product distributed by the air conditioning system in the premises to be treated is directly determined as a function of a real representative parameter.
• the fumigation device is thus perfectly autonomous and adapted to the changing conditions present on the site to be treated.
• a remote monitoring system can be provided which indicates by various sensors, such as pressure switches, any malfunction of the device. The only intervention on the installation site of the device would then be reduced to replacing the RP1, RP2 product tanks and the RE water tank.
• the fumigation device can go into safety if the air flow in the system drops below a predetermined threshold value, for example 0.5 ms " 1 .
• a pressure switch on the air duct which connects the air pump PA to the nozzle 3.
• a threshold value by example 80 mbar
• the contact of the pressure switch opens and triggers the safety of the fumigation device. This detection amounts to detecting the presence of a spray, since it is the air emitted by the air pump PA which allows the spraying.
• An overpressure during the rinsing / cleaning cycle indicates the presence of an obstructing plug and causes the contact of a pressure switch to open, which puts the device in safety.
• the fumigation device for safety reasons, can be placed in a cabinet, the door of which is equipped with an opening detection system.
• An optical sensor associated with electronic logic supplied by the accumulator, makes it possible to detect the movement of the strike necessary for opening the door. Immediately, the device goes into safety, stopping the diffusion of the product. The device can only be restarted once an n-digit code (s) has been entered on an internal keyboard, and the door closed.
• the spraying means are more conventional here, since it is a conventional manual spraying pump 38 as can be encountered on dispensers of fluid for domestic use.
• the spray nozzle 3 is integrated in a spray head. distribution 30 in which an outlet channel is formed.
• the nozzle may include a swirl chamber which creates a vortex centered on the spray orifice. The fluid product is thus sprayed.
• the outlet channel is connected to the hollow actuating rod of the pump 38 which is integral with the piston (not shown).
• the pump comprises a dip tube 35 which extends to the bottom of a product reservoir 34
• the dispensing head is on the other hand connected to a plunger 32 slidably mounted in a solenoid 33.
• a microprocessor 36 is provided to control the supply of the solenoid by adjusting the frequency, that is to say the time interval between each supply.
• the microprocessor 36 as in the first embodiment shown in FIG. 1, also controls the prior supply of the thermostatic jacket 2 which surrounds the enclosure 1.
• the microprocessor program incorporates a set value which corresponds to the average value representative of the air circulation in the room to be treated.
• the fumigation device of Figure 3 is of a simpler design and lends itself particularly well to domestic use, while the device of Figure 1 is rather of industrial use.
• a correspondence table may be delivered with the device using which the target value can be determined according to the volume and the nature of the part to be treated.
• An entrance hall should be treated more intensely than a living room.
• the enclosure 1 of FIG. 3 is of a reduced size, but operates in the same manner as that of FIG. 1, except that the spray of sprayed product contains no air flow and that the upper opening 12 gives directly into the atmosphere.
• the exhaust of the gaseous product therefore takes place in a non-forced manner, simply because of the rise of the gases under the action of heat.
• the gaseous product at the outlet of the upper opening 12 nevertheless acquires a certain speed due to the reduced section of the upper opening.
• This fumigation device can be presented in a box 6 provided with an exhaust mouth at the location of the upper opening to allow the exit of the gaseous product.
• An insulating protection 21 can be provided around the enclosure to prevent it from heating up the entire device.
• the enclosure in the two embodiments described plays the role of particle accelerator or cycloton, in the sense that the particles which escape through the upper opening have a certain speed. This phenomenon is obtained by the introduction of a current of air into the enclosure and favored by the judicious section ratio of the openings of the enclosure.
• the enclosures which have just been described have a cylindrical bottle shape. One can of course imagine any kind of enclosure geometry with two openings without departing from the scope of the invention.
• FIG. 4 represents a preferred form of cleaning means, extracted from the fumigation device in which they are integrated.
• the cleaning means designated as a whole by the reference numeral 6 comprise an overpressure chamber 60 which has a general horseshoe shape.
• overpressure chambers having other shapes without departing from the scope of the present invention.
• the shape chosen is however preferable, since it has a small footprint and can also be obtained on the market at low cost.
• the chamber 60 includes an inlet 62 and an outlet 61. Its capacity is of the order of a few cubic centimeters to 20 cubic centimeters.
• the chamber is actually formed by a thermally conductive metal tube with a length of about 30 cm, bent to give it a folded shape, for example a horseshoe shape.
• the tube forming the chamber 60 is bordered by an electrical resistance 65 which extends in the horseshoe over a major part of its length.
• This resistor 65 is connected to a power supply 66 and has the function of heating the overpressure chamber 60 and therefore its contents.
• the chamber 60 and the resistor 65 are mounted on a base 63 which grips the chamber 60 by means of four legs 64.
• the chamber 60 is provided at each of its ends 61, 62 with a valve 7, 8.
• the valve 8 connected to the inlet 62 of the chamber is a non-return valve which prevents the liquid from flowing back.
• the valve 7 connected to the outlet 61 of the chamber is a suitably calibrated overpressure valve which allows the superheated and therefore vaporized liquid to escape from the chamber.
• the non-return valve 8 may comprise a spring which slightly presses the ball 82 on its seat 83, although in the embodiment illustrated in FIG. 4, the valve 8 does not include a spring. Except for the spring, the two valves 7 and 8 may be identical. They each include a sleeve 71, 81 into which is inserted a socket 73, 83 which forms the valve seat. The ball 72, 82 is engaged in the sleeve 73, 83 and a shutter member 74, 84 limits the stroke of the ball in the sleeve. A spring 75 is compressed between the ball 72 and the shutter member 74 to apply the ball 72 to its seat 73, in the case of the pressure relief valve 7.
• FIG. 5 it is a preferred form, particularly from the point of view of the spraying means.
• the device comprises a water pump PE connected, on the one hand to a water tank RE by a supply conduit 44 and, on the other hand, to the valve 8 of the cleaning means by a conduit 43.
• a conduit 47 which enters the enclosure 1 at its bottom 13. The end of the conduit 47 is oriented towards the hot wall of the enclosure opposite the nozzle. Thus, the superheated steam will be projected against this hot wall. Pressure cleaning is thus carried out.
• the water which is vaporized can be added with a bacteriostatic substance in order to avoid any circulation of bacteria, microbes or other substances capable of reacting with the human organism.
• a bacteriostatic substance in order to avoid any circulation of bacteria, microbes or other substances capable of reacting with the human organism.
• H2O2 hydrogen peroxide
• a microprocessor M connected to each member by links 51 -56.
• the microprocessor can be programmed to control as follows. First, it energizes the thermostatic jacket so that it reaches the required temperature, for example 3 () 0 ° C. Once this temperature has been reached, the microprocessor controls the actuation of the air pump PA. Then, it controls the actuation of the product pump PP after having checked the state of the solenoid valve EV.
• the product reservoir RP1 If the product reservoir RP1 has reached its minimum level, it controls the tilting of the solenoid valve EV on the reservoir RP2. Activation of the PP product pump means the emission of a specific dose or dose train.
• the microprocessor controls the actuation of the PE water pump, which has the effect of filling the overpressure chamber 60 with water (possibly with 1% of H2O2). .
• the microprocessor controls the supply of the resistor 65.
• the temperature of the water in the chamber increases, which causes an increase in the pressure, since the non-return valve 8 prevents backflow of the water in the conduit 43 and that the pressure relief valve 7 is adapted to open only at a determined pressure, in this case approximately 5 bars.
• the pressure of 5 bars in the chamber is reached at a temperature of approximately 130 ° C.
• the pressure relief valve then opens to allow a jet of pressurized superheated steam to escape.
• the combined action of temperature and pressure allows rapid and total stripping of the hot wall of the enclosure. It is also preferable to cut off the supply to the thermostatic jacket 2 during the cleaning operation.
• the pressure relief valve 7 closes again and the non-return valve 8 opens to let water enter the chamber under the action of the PE pump. The chamber is thus again filled for the next cleaning operation.
• the actuation of the water pump PE and the cleaning means 6 can then simply be ordered after the last spraying of product, for example at the end of evening, before putting the device on standby for the night.
• the microprocessor finally controls the cut off of the power supply of the jacket 2.
• pressure cleaning means 6 of the hot wall of the enclosure can be implemented together with the cleaning means of the mixing nozzle 3.
• the supply of nozzle water 3 through the conduit 43 (fig. 1) allows rinsing the nozzle and primary cleaning of the hot wall and the pressure cleaning means 6 allow a real pickling of the hot wall.

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• Engineering & Computer Science (AREA)
• Life Sciences & Earth Sciences (AREA)
• Health & Medical Sciences (AREA)
• General Engineering & Computer Science (AREA)
• Mechanical Engineering (AREA)
• General Health & Medical Sciences (AREA)
• Combustion & Propulsion (AREA)
• Pest Control & Pesticides (AREA)
• Chemical & Material Sciences (AREA)
• Public Health (AREA)
• Animal Behavior & Ethology (AREA)
• Wood Science & Technology (AREA)
• Zoology (AREA)
• Environmental Sciences (AREA)
• Toxicology (AREA)
• Veterinary Medicine (AREA)
• Insects & Arthropods (AREA)
• Epidemiology (AREA)
• Apparatus For Disinfection Or Sterilisation (AREA)
• Nozzles (AREA)
• Catching Or Destruction (AREA)
• Heat Treatment Of Water, Waste Water Or Sewage (AREA)
• Agricultural Chemicals And Associated Chemicals (AREA)

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• 1996
  • 1996-01-19 HU HU9801717A patent/HUP9801717A3/hu unknown
  • 1996-01-19 JP JP8523299A patent/JPH11514247A/ja active Pending
  • 1996-01-19 CZ CZ972401A patent/CZ240197A3/cs unknown
  • 1996-01-19 WO PCT/FR1996/000087 patent/WO1996023530A1/fr not_active Application Discontinuation
  • 1996-01-19 EP EP96901416A patent/EP0808178A1/fr not_active Withdrawn
  • 1996-01-19 AU AU45442/96A patent/AU698550B2/en not_active Ceased
  • 1996-01-19 CA CA002211978A patent/CA2211978A1/en not_active Abandoned
  • 1996-03-28 TW TW085103717A patent/TW297772B/zh active

Non-Patent Citations (1)

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