JPH0448507B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION BACKGROUND OF THE INVENTION The present invention relates to fumigation disinfection or deodorization treatment of the interior of a building using permanent equipment installed in the building. Typically, this type of equipment consists of a large container for storing propellants and treatment agents, a system of pipes running from the container throughout the building, and sprayers installed at required locations along the pipe system. The injection port and
It consists of a control valve, usually operated by a timer, for controlling the flow of the propellant and treatment agent mixture from the container to the jet orifice.

The present invention is directed to applications where, for example, fluorocarbons, hydrocarbons or liquefied carbon dioxide are used as propellant. The treatment agent is mixed or dissolved in a propellant that serves to pressurize the storage container to force the fluid out of the container and to form droplets of the fluid when ejected from the spray nozzle. It also has the function of crushing.

The treatment agents will, of course, vary depending on the requirements, for example pest control agents such as mixtures of pyrethrin and piperonyl, insecticides such as 2,2-diclobinyl dimethyl phosphate or lauryl methacrylate. deodorizers, etc.

Existing installations are satisfactory in the absence of equipment failure, but occasionally electrical system failures cause valves to become inoperable, or timer control failures cause valves to remain open for excessively long periods of time. It may be left alone. In that case, all or an excess of the fluid in the storage container will be released into the building. Such excessive release of treatment agents is harmful due to the nature of the treatment agents, and can even be life-threatening, especially if there are people in the building at the time of their failure.

SUMMARY OF THE INVENTION It is an object of the present invention to remove excess quantities from a storage container by providing a metered and discharged storage container and a three-way valve that ensures that the storage container is never in direct communication with the piping system. This is to prevent the possibility of fluid leakage.

Briefly, the present invention provides an aerosol treatment device for treating the interior space of a building by spray or aerosol, in which a large amount of treatment fluid consisting of a treatment agent dissolved or mixed in a high vapor pressure liquid propellant is provided. a storage container for accommodating a unit charge of said process fluid; a metering vessel for accommodating a unit charge of said process fluid; at least one injection port for injecting said process fluid into an interior space of said building; A pipe system having pipes connecting the metering container and the storage container, and arranged within the pipe system for controlling the flow of fluid from the storage container to the metering container and from the metering container to the injection port. a first position in which the metering container is isolated from piping leading to the injection port and communicated with the storage container; and a first position in which the storage container is isolated from the metering container and piping leading to the injection port and the metering container is communicated with the injection port. Provided is a device comprising a switching valve that is movable between a second position and a second position communicating with piping.

The present invention also provides an aerosol treatment method for treating the interior space of a building by spraying or aerosol with a large amount of treatment fluid consisting of a treatment agent dissolved or mixed in a high vapor pressure liquid propellant, comprising: Communication is established between the storage container and the metering container for the treatment fluid, with the pipe system having at least one injection port for injecting the treatment fluid into the internal space to be treated being isolated from the storage container and the metering container for the treatment fluid. introducing a unit charge of process fluid from the storage container into a metering container; then cutting off communication between the storage container and the metering container; and then inserting the storage container into the metering container. and a step of establishing communication between the metering container and the piping system and injecting the processing fluid from the metering container through the piping system and into the interior space of the building through the injection port while the metering container is disconnected from the piping system. , and then interrupting communication between the metering vessel and the piping system for the next processing operation.

DESCRIPTION OF THE EMBODIMENTS The accompanying drawings illustrate one embodiment of the invention. In the illustrated embodiment, the propellant and treatment agent reservoirs include:
Each includes a discharge control valve 2 and a discharge pipe 3 whose lower end is open.
It consists of a plurality of cylinders 1 equipped with.

The valve 2 is connected to a header or manifold 5 by a pipe 4. Header 5 has a single outlet communicating with inlet 6 of three-way valve 7.
A first communication port of the three-way valve 7 is connected to a branch pipe 8, and a second communication port is connected to a fluid supply pipe 9.

Valve 7 is of known construction and communicates inlet 6 with tube 8 when tube 9 is closed, and communicates tube 8 with tube 9 when inlet 6 is closed.

The tube 9 leads to the point of end use, in the example shown a spray nozzle 10. On the other hand, the dividing pipe 8 is connected to a unit charge measuring container 11. In a normal state, the inlet/outlet 12 of the container 11 is connected to the pipe 8 from the container 11.
It is open in the direction of outflow to the vessel, but closed in the direction of inflow from the tube 8 into the container.

Metering of the unit charge of fluid into the container 11 can be carried out in various ways. For example, the capacity of metering vessel 11 is such that it accepts fluid from cylinder 1 until the pressure therein reaches a pressure equal to the pressure in cylinder 1, and at that point it accepts a unit charge of fluid. It can be set to be filled. This method is satisfactory if the cylinder 1 is such that it is maintained at constant pressure at all times, or alternatively, if the cylinder 1
If it is not required that the amount charged each time into the cylinder 1 is constant, the above method may be applied even if the pressure inside the cylinder 1 decreases depending on the amount of fluid used in the cylinder 1. can be taken.

Alternatively, the weight of the weighing container 11 and its contents (the fluid charged in the container) is constantly measured,
When the total weight reaches a predetermined value, the valve 7 may be activated in response to stop the flow of fluid from the cylinder 1. One arrangement for achieving this is to suspend the container 11 by means of a spring 13, which operates in a spring balance-like manner, as shown in the accompanying figures. Container 11
A striking tool 15 is attached to a suspension rod 14 connected between the rod and the spring 13, and when the rod 14 is lowered as fluid is charged into the container 11 and the weight of the entire container increases, the striking tool 15 is activated by a micro switch. 16 can be actuated, thereby causing valve 7 to operate properly.

In use, valve 7 is first actuated to charge fluid from cylinder 1 through pipe 8 into metering container 11, closes the second communication port to pipe 9, and closes the second communication port to inlet 6 and pipe 8. Open one communication port. Once the container 11 has been filled with a unit charge of fluid, the valve 7 is actuated again, closing the inlet 6 and opening the first communication port with the tube 8 and the second communication port with the tube 9.

Thereby, the charged fluid in the container 11 is injected from the nozzle 10 through the pipe 8, the first communication port, the valve 7, the second communication port and the pipe 9 due to the pressure in the container.

In the configuration of the present invention described above, even if the valve 7 becomes inoperable for some reason, the worst case scenario is that the nozzle 10 becomes incapable of ejecting fluid. If the valve malfunctions, fluid will flow out of the nozzle without causing any harm to the surrounding area. Nozzle 10
The inability to eject fluid from the pump can be detected by observation or by using a suitable monitoring device.

If desired, the number of times the microswitch 16 is closed (i.e. the number of times fluid is charged into the metering container 11 and therefore
Based on the number of times the fluid is injected from the nozzle 10, it may be possible to notify that the stored fluid in the cylinder or storage container 1 is nearing depletion. Furthermore, the operation of the microswitch can also be used as a means to indicate the above-mentioned failure of the nozzle to eject or a malfunction of the valve 7. Alternatively, the microswitch 16 can be used as a trigger for sequential operation of the valves 7, rather than as a timer means as is conventional.

In the figure, dotted lines 17 indicate the loading of fluid into the container 11, and solid lines 18 indicate the discharge of fluid from the container 18.

In a conventional device that uses multiple cylinders 1,
The amount discharged from each cylinder became uneven, and cylinders had to be replaced frequently.
This can be avoided by arranging the feed tubes 4 of each cylinder such that their entry points 19 into the manifold 5 are equidistant from a single exit point of the manifold. .

According to the equipment of the present invention, when liquid carbon dioxide is used as a propellant, even if some of the propellant is gasified when charged into the measuring container 11, the processing agent remains dissolved in the liquid propellant. This was recognized. According to experiments, this ranges from 30g for small to 30g for large.
Measuring container 1 with various fluid charging capacities up to 30Kg
It was found that this also applies when using 1.

The fluid is aerosolized (droplets with a diameter of 2 to 20 microns) from the container 11 through the tubing system 8, 9 and the nozzle 10.
The time required to inject all of it into the atmosphere in the form of
For example, 15 minutes. During this injection, the pressure in the system is
The liquid propellant remains substantially constant until depleted. When the liquid propellant is depleted, the pressure drops to that of gaseous CO ₂ and it takes another 30 minutes or so for gaseous CO ₂ to be evacuated from the metering vessel 11, thereby reducing the pressure in the pipework 8, 9 and the nozzle. From 10 onwards, the processing agent normally held in the liquid phase of the propellant is completely discharged.

The above-mentioned required time is given merely as an example, and the actual required time may vary depending on the capacity of the measuring container 11, the number, length, diameter, and number of nozzles of the pipe system. Needless to say.

[Brief explanation of drawings]

The attached figure is a schematic diagram of an aerosol treatment device according to the invention. 1: Cylinder (storage container), 5: Manifold,
6: Inlet, 7: Three-way valve, 8: Branch pipe, 9: Fluid feed pipe, 10: Spray nozzle, 11: Measuring container, 1
2: Doorway, 13: Spring, 14: Hanging rod, 1
5: Hitting tool, 16: Micro switch.

Claims (1)

[Scope of Claims] 1. An aerosol treatment device for treating the interior space of a building by spray or aerosol, containing a large amount of treatment fluid consisting of a treatment agent dissolved or mixed in a high vapor pressure liquid propellant. a metering vessel for accommodating a unit charge of the process fluid; at least one injection port for injecting the process fluid into the interior space of the building; the injection port and the metering vessel; a pipe system having pipes connecting the storage container to the pipe system; and a pipe system disposed within the pipe system for controlling the flow of fluid from the storage container to the metering container and from the metering container to the injection port. And,
a first position where the metering container is isolated from piping leading to the injection port and communicated with the storage container; and a second position where the storage container is isolated from the metering container and the piping leading to the injection port and the metering container is communicated with the piping leading to the injection port. A device consisting of a switching valve that is movable between positions. 2. The device according to claim 1, wherein the switching valve has a third position that isolates the storage container, metering container, and injection port from each other. 3. The metering container is attached via an elastic member, and the movement of the metering container caused by the weight of the fluid inside is used to control the operation of the switching valve. Claim 1
The device according to paragraph or paragraph 2. 4. In an aerosol treatment method for treating the interior space of a building by spraying or aerosol with a large amount of treatment fluid consisting of a treatment agent dissolved or mixed in a high vapor pressure liquid propellant, the interior space of the building to be treated. With a piping system having at least one injection port for injecting the treatment fluid to the storage container and the metering container for the treatment fluid being isolated from the storage container and the metering container, communication is established between the storage container and the metering container to store the treatment fluid. introducing a unit charge of process fluid from a container into a metering container; then cutting off communication between the storage container and the metering container; and then cutting off the storage container from the metering container and the piping system. in this state, establishing communication between the metering container and the piping system, and injecting the processing fluid from the metering container through the piping system and into the interior space of the building through the injection port; shutting off communication between the metering vessel and the piping system for processing operations. 5. A method according to claim 4, in which the establishment and disconnection of communication between the storage container, the metering container and the piping system is effected by a single valve. 6.Claim 4, wherein the communication between the storage container and the metering container is cut off in response to the weight of the fluid introduced from the storage container into the metering container reaching a predetermined value. or the method described in Section 5.