JPS59193166A - Method and apparatus for cyclically injecting fluid from high pressure supply source - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION BACKGROUND OF THE INVENTION The present invention relates to smoking disinfection or deodorization treatment for the interior of a building using permanent equipment installed in the building.

Typically, this type of equipment consists of a large container containing propellants and treatment agents, a pipe system running from the container throughout the building, and a sprayer installed at required locations along the pipe system. It consists of a nozzle and a control valve, usually operated by a timer, for controlling the flow of the propellant and treatment agent mixture from the container to the nozzle.

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 colloquially mixed into the propellant;
The propellant serves to pressurize the storage container to cause the fluid to flow out of the container, and also serves to break up the fluid into droplets when ejected from the spray nozzle.

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 equipment is satisfactory in the absence of equipment failure, but occasionally electrical failures may cause valves to become inoperable, or timer control failures may cause valves to remain open for an excessively long period of time. may be left alone. In that case,
All or an excess of the fluid in the storage container will be released into the building.

Excessive release of such treatment agents is harmful due to the nature of the treatment agent, especially if there are people in the building at the time of the failure.
Even life-threatening.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a metered and discharged storage container and to ensure that the storage container is never in direct communication with the piping system.
The purpose of the present invention is to prevent the possibility of excessive amounts of fluid escaping from the storage vessel by providing three-way valves.

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 used. a storage vessel for accommodating, 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; and said injection port. a pipe system having pipes connecting the measuring container and the storage container; and a pipe system arranged within the pipe system,
A first device for controlling the flow of fluid from the storage container to the metering container and from the metering container to the injection port, which disconnects the metering container from piping leading to the injection port and communicates with the storage container. and a second position which isolates the storage container from the metering container and piping leading to the jetting port and communicates the metering container with the piping leading to the jetting port.

The present invention also provides an aerosol treatment method for treating an interior space of a building by spraying or aerosol with a treatment fluid consisting of a treatment agent dissolved or mixed in a high vapor pressure liquid propellant, comprising: - storage of the treatment fluid; introducing a unit charge of process fluid from a container into a metering vessel; closing the storage vessel; and directing the process fluid from the metering vessel through a control system and through at least one injection port into the building. A method is provided comprising the steps of: injecting into a space; and re-closing the metering vessel for the next processing operation.

The attached figure shows one embodiment of the present invention. In the illustrated embodiment, the propellant and treatment agent storage containers include a plurality of cylinders 1, each equipped with a discharge control valve 2 and a discharge pipe 6 open at the lower end.
It consists of

The valve 2 is connected by a pipe 4 to a header or manifold 5. 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 branch tube 8 is connected to the unit loading device needle cap container 1.
Connected to 1. In a normal state, the inlet/outlet 12 of the container 11 is open in the direction of outflow from the container 11 to the tube 8, but is 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. In Example 1, the capacity of the metering container 11 is such that it receives fluid from the cylinder 1 until the pressure inside it reaches a pressure equal to the pressure inside the cylinder 1, and when it reaches a pressure equal to the pressure in the cylinder, the unit load is determined. It can be set to be filled with an amount of fluid. This method is satisfactory if the cylinder 1 is such that it is maintained at a constant pressure at all times, or alternatively, it is not required that the amount charged each time into the container 11 is constant. In this case, the above method can be used even if the pressure inside the cylinder 1 decreases depending on the amount of fluid used therein.

Alternatively, the weight of the weighing container 11 and its contents (the fluid charged in the container) is constantly measured, and when the total weight reaches a predetermined value, the valve 7 is actuated in response. It can be configured 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
The striking tool 1 is connected to the suspension rod 14 connected between the spring 13 and the spring 13.
5 is attached so that when the rod 14 is lowered due to the fluid being charged into the container 11 and the weight of the entire container increasing, the batter 15 operates the microswitch 16, thereby properly operating the valve 7. It can be done.

In use, first the valve 7 is operated to charge fluid from the cylinder 1 through the pipe 8 into the metering container 11, and then the pipe 9
The second communication port to the inlet 6 and the first communication port to the tube 8 are opened. 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 is that the nozzle 10 becomes incapable of ejecting fluid, and unlike the conventional two-equipment system, In addition, a malfunction of the valve will not cause fluid to flow out of the nozzle and cause harm to the surrounding area. The inability to eject fluid from the nozzle 10 can be detected by observation or by means of a suitable monitoring device.

If desired, the stored fluid in the cylinder or storage container 1 can be depleted based on 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 the number of times fluid is injected from the nozzle 10). It is also possible to notify when the state is approaching. Furthermore, the actuation of the microswitch can also be used as a means for indicating the failure of the nozzle to eject or a malfunction of the valve 7 as described above. Alternatively, the microswitch 16 can be used not as a timer means as in the conventional case, but as a trigger (starter) for sequentially operating the valves 7.

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 a plurality of cylinders 1, the discharge amount of each cylinder becomes uneven, and it is necessary to replace the cylinders 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. Experiments have shown that this is true even when using metering containers 11 of various fluid charge capacities, from small sag to large 30 to 2.

The time required to inject the entire fluid from the container 11 through the tubing 8.9 and the nozzle 10 into the atmosphere in the form of an aerosol (droplets with a diameter of 2 to 20 μm) is 15 minutes in Example 1. During this injection, the pressure within the system remains substantially constant until the liquid propellant is depleted. When the liquid propellant is depleted, the pressure drops to that of gaseous CO2;
It takes about 30 minutes for the liquid to be discharged from the metering container 11, so that the treatment agent normally held in the liquid phase of the propellant is completely discharged from the pipe system 8.9 and the nozzle 10. Ru.

The time required above is given as an example only.
It goes without saying that the actual time required will vary depending on the trough of the measuring container 11, the number, length, diameter, and number of nozzles in the pipe system.

[Brief explanation of drawings]

The accompanying figure is a schematic diagram of an aerosol treatment 84 device according to the present invention. 1: Cylinder (storage container) 5-frame hold 6: Inlet a: Three-way valve 8: Branch pipe 9 Two-fluid feed pipe 10: Spray nozzle 11: Measuring container 12: Inlet/outlet 16: Splash 14: Hanging rod 15 : Hitting tool 16: Micro switch

Claims (1)

[Claims] 1) An aerosol treatment device for treating the interior space of a building with 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 storage container for accommodating a unit charge of said process fluid; a metering vessel for containing a unit charge of said process fluid; at least one 1* injection port for injecting said process fluid into the interior space of said building; said injection port; and a pipe system having pipes connecting the metering container and the storage container, and arranged within the pipe system to control 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 disconnected from the piping leading to the injection port and communicates with the storage container; and a first position in which the storage container is disconnected from the metering container and the piping leading to the injection port and the metering container is connected to the injection port. A device comprising a switching valve that is movable between a second position and a second position communicating with a pipe. 2) The device M according to claim 1, wherein the switching valve has a sixth position that isolates the storage container, the metering container, and the injection port from each other. 3) The metering container is attached via an elastic member, and the operation of the switching valve is controlled by utilizing movement of the metering container caused by overlapping of internal fluids. A device according to claim 1 or 2. 4) In an aerosol treatment method in which the interior space of a building is treated by spray or aerosol with a treatment fluid consisting of a treatment agent dissolved or mixed in a high vapor pressure liquid propellant, unit charging from a treatment fluid storage container tll amount of processing fluid
closing the storage container; injecting the process fluid from the metering container through a piping system and into a space within the building through at least one injection port; method consisting of the step of re-closing the container for the next processing operation. 5) A method according to claim 4, wherein the closing and opening of each container is performed by: a single valve. 6) A method according to claim 4 or 5, wherein the closing of the storage container takes place in response to the weight of the fluid introduced into the metering container reaching a predetermined value.