JPH0681281U - Disinfectant spraying device - Google Patents

Abstract

(57) [Summary] [Purpose] A mixture of a disinfectant and a foaming agent in a prescribed ratio was mixed with compressed air and foamed in the form of foam to spray onto the surface to be disinfected. Perform safe and efficient sterilization. A main pipe 32 having a disinfecting liquid supply orifice 34 and a compressed air supply orifice 34 at both ends, and a central axis of the main pipe 34 at a side portion of the main pipe 32 at a substantially central position of both supply orifices 34, 34. A foam gun 14 having a spray outlet 48 constituted by a branch pipe connected so as to intersect with each other at right angles is provided so that the disinfectant liquid and the compressed air supplied from both orifices 34, 34 face each other in the main pipe 32. The particles flow and collide with each other, whereby bubbles are generated and ejected from the spray outlet 48. As a result, the disinfecting liquid adheres to the surface to be disinfected in a foamed form without being scattered in a spray form, so that safe and efficient disinfection becomes possible.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention provides a germicidal disinfectant for bacteria, viruses, yeasts, molds, etc. in operating rooms of hospitals, aseptic rooms, pharmaceutical factories, food factories, bio-related, clean rooms requiring aseptic dust related ICs, aseptic working rooms, etc. It is to provide an effective device for spraying.

[0002]

[Prior art and its problems]

 Conventionally used sterilizing agents are cresol soap solution, carboxylic acid, chlorine agent, hypozinc salt, iodine, formalin, etc., but these agents have strong irritation, toxicity and odor to human body, and Since it is corrosive to rubber, plastic, etc., its usage is complicated.

On the other hand, a long-chain alkyl quaternary ammonium salt (inverse soap) has bactericidal properties and antiseptic properties, is colorless and odorless, has a broad bactericidal spectrum, and is currently widely used in various fields. On the other hand, glutaraldehyde is highly irritating and toxic, but its bactericidal power is higher than that of reverse soap, and it has been used for sanitation in hospitals for a long time in Japan. In hospital sanitation, a sterilization method such as a mist method of ejecting mist from a fogger (sprayer) or a wiping method with a waste cloth (wiping cloth) is implemented to prevent contamination of fungi in the operating room and clean room of the hospital. Has been done. It is difficult to prevent exposure to workers by either method, and the former should be kept out for a few days after the spraying work is completed, and use equipment such as an operating room until the airborne fugs fall until they fall. I can't. The latter requires a long working time and is likely to expose the worker to all pathogens at the same time as being exposed to the disinfectant.

Particularly in recent years, a new kind of virus such as AIDS virus has appeared, and it is an important subject to shorten the working time and reduce the amount of exposure. Although benzalkonium chloride has low toxicity to the human body, when it is continuously used, resistant bacteria appear and its efficacy declines, so that it is unavoidable to use a drug having stronger bactericidal activity, for example, glutaraldehyde. Glutaraldehyde has a great bactericidal activity, but also has a great impact on the human body. The LD50 (mg / kg) of both are as follows. Mouse Rat Benzalkonium chloride 340-2000 410-10600 Glutaraldehyde 1560 (25% solution)

[0005]

[Means for solving problems]

 An object of the present invention is to provide a device for quickly and safely spraying a dangerous sterilizing agent to a human body, and by achieving this object, the problems of the prior art described above can be solved. To this end, the present invention mixes a germicidal disinfectant and a foaming base (or a foaming agent) to form a mixed diluting solution, and the mixed diluting solution is mixed with pressurized air to obtain about 1 to 100 liters. Disclosed is a disinfectant spraying device suitable for spraying while foaming at a rate of / kg.

[0006]

[Action and effect]

 According to the present invention, since the diluted solution prepared by mixing the germicidal disinfectant and the foaming base is sprayed on the floor surface in the form of foam, the spraying work can be done only once and compared with the existing Fogger method. Exposure to fine chemical particles such as mist is reduced. The application of the germicidal disinfectant according to the present invention is different from the Hogger method, in that it is easy to apply the drug to the target area and, in addition, the application liquid is a foam and the exposure to the operator It has the advantage of extremely low concentration.

[0007]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the accompanying drawings. First, referring to FIG. 1, there is shown an example of a sterilizing / disinfecting agent spraying device of the present invention used for carrying out a sterilizing / disinfecting agent spraying method. The spraying device includes a chemical liquid tank 10 containing a diluting liquid composed of a germicidal disinfectant and a foaming base, and the chemical liquid tank 10 is provided with a foaming means through a pipe line 12, preferably one inlet end of a foam gun 14 described later. Connected to. A pump 16 is connected to the pipe line 12, a valve 18 is installed between the suction side of the pump and the chemical liquid tank 10, and another valve 20 is provided in the bypass pipe line 12A of the pump 16 and They are connected in parallel. By operating these valves 18 and 20, the flow rate of the diluted solution from the chemical liquid tank 10 can be adjusted. This pressure can be confirmed by a pressure gauge 22 provided on the discharge side of the pump 16.

A compressor 24 is connected to the other inlet end of the foam gun 14 to supply compressed air to the foam gun 14. Two valves 26 and 28 are provided in a pipe line connecting the compressor 24 and the foam gun 14 so as to adjust the flow rate of the pressurized air, and this pressure can be confirmed by a pressure gauge 30. The liquid pipeline from the pressure gauge 22 to the foam gun 14 and the air pipeline from the pressure gauge 30 to the foam gun 14 should be extended to about 10 to 50 m depending on the capacity of the pump 16 and the compressor 24. You can

In the above arrangement, if the valves 18, 20, 26, 28 are adjusted at the time of the first operation, the spraying work can be immediately performed only by energizing the pump 16 and the compressor 24 from the second time. be able to. The foam gun 14, as shown in FIG. 3, consists of a T-shaped pipe section 32 and two orifices 34 attached to the two opposite ends of the pipe section 32. The air or the diluted solution of the sterilizing disinfectant and the foaming base sent through the pipe joint 38 further flows into the pipe portion 32 through the orifice 34, and the sterilizing disinfectant and the foaming agent which similarly flowed in from the opposite end. It mixes with the base diluent or air, foams into a foam and then flows out of the outlet 48 of the pipe section 32. The air or diluted liquid sent through the pipe joint 38 passes through the orifice 34, flows into the pipe portion 32, and is mixed with the diluted liquid or air similarly flowing in from the opposite end thereof, and foams into a foam. From the outlet portion 48 of the pipe portion 32. The shape from the foam gun 14 to the nozzle 52 may be a compact size such as a pistol type if necessary.

Returning to FIG. 1, a 0.1 to 40 meter hose 50 is connected to the outlet 48 of the pipe section 32 and a nozzle 52 is attached to the opposite end of the hose. A stop valve 54 is provided between the nozzle 52 and the hose 50. In this way, the foamed diluted solution is discharged from the foam gun 14 through the hose 50 and the nozzle 52. As an example of the state of the foam to be sprayed, it is good that the discharged foaming chemical liquid does not become a mist but becomes a lump of foam and flies up to about 5 meters ahead. The ejection angle is about 15 ° when the object 1 meter ahead from the tip of the nozzle 52 is targeted. By changing the shape of the injection port of the nozzle 52, the spraying shape can be circular, elliptical, or rectangular depending on the purpose of spraying. The foam state changes variously depending on the relationship between the orifice diameter of the foam gun 14 and the air pressure and the liquid pressure.

Next, referring to FIG. 2, there is shown another example of the spraying device of the present invention capable of carrying out the disinfectant disinfectant spraying method. This spraying device includes a pressure cylinder 60 filled with a diluting solution of a sterilizing agent and a foaming base to be sprayed, and a compressor 64 connected to the inside of the pressure cylinder 60 through a pipe line 62 above the liquid level. To do. The line 62 is provided with a valve 66 for adjusting the amount of air from the compressor 64, and this pressure can be confirmed by a pressure gauge 68. A space 60A above the liquid surface inside the pressure cylinder 60 is connected to one inlet end 74 of a foam gun 72 through a pipe 70. Even if the foam gun 72 has the structure described above. Any other suitable structure may be used. An inlet end 76 on the opposite side of the foam gun 72 is connected to a pipe 78 whose lower end is immersed in the chemical liquid in the pressure cylinder 60. The outlet 80 of the foam gun 72 is connected to the nozzle 84 by a hose 82. The sterilizing / disinfecting agent spraying work can be arbitrarily started and stopped simply by opening and closing the valve 85.

In this structure, the pressurized air sent from the compressor 64 is sent to the space 60 A above the pressure cylinder 60, applies pressure to the chemical liquid, and the chemical liquid rises in the pipe 78 and goes to the form gun 72. At the same time, pressurized air is sent from the upper space 60A through the conduit 70 to the form gun 72, where it mixes with the chemical solution sent as described above, foams it, and discharges it from the nozzle 84 through the hose 82. become. According to the present invention, the foaming ratio (ratio of foam volume to weight) is an important condition for foaming and spraying the germicidal disinfectant using the above device. The foaming conditions need to be such that a volume of foam of about 1 to 80 liters, preferably 20 to 40 liters, can be formed per kg of diluted solution. If the expansion ratio is less than this, the sprayed liquid is less likely to stay on the vertical surface, and if the expansion ratio exceeds this expansion ratio, the volume of the foam increases and the flight distance of the foam decreases.

In order to obtain such a foaming ratio, a foaming base is added to a drug solution obtained by diluting an active ingredient drug to a practical concentration so as to be 0.1 to 10% by weight. Such a diluted solution is sprayed by using the spraying device described above. At this time, it is possible to mix it in the foam gun and obtain an appropriate expansion ratio according to the ratio of the liquid flow rate and the air flow rate. . Regarding the relationship between the orifice diameter of the foam gun and the air flow rate and liquid flow rate, the liquid volume increases as the orifice diameter of the foam gun increases. Good foaming occurs when the air pressure and the liquid pressure are almost equal. For example, although the air pressure when the hydraulic 1 kg / cm ² is readily released mist exceeds 1 kg / cm ^2, becomes lighter foam, hard to fall in a vertical plane. On the other hand, when the air pressure is 1 kg / cm ^{2 and} the liquid pressure exceeds 1 kg / cm ² , bubbles containing a lot of water are formed. That is, it tends to fall quickly on a vertical surface. The foaming agent can be appropriately selected and used from the substances that the diluting solution of the germicidal disinfectant gives the expansion ratio. Although a foamy surfactant is the basis of the formulation, the method of spraying the sterilizing and disinfecting agent using the device of the present invention will be described below with reference to examples.

Example 1 The sterilizing and disinfecting agent used consisted of 50% benzalkonium chloride (alkyldimethylbenzylammonium chloride) and 50% water, which was diluted 10 times or 100 times to give benzal chloride. The ruconium drug substance was made to be a 0.5% liquid or a 5% liquid. For example, it can be obtained by dissolving 1 kg of disinfectant in 9 liters or 99 liters of water. Separately, 10% polyoxyethylene alkyl ether, 10% 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, 5% isopropyl alcohol and 75% water were uniformly mixed. A prepared foaming agent was prepared and added to the above diluted solution in an amount of 1 to 5%. The diluted solution thus prepared was sprayed by the forming method using the apparatus shown in FIG. The foaming test was carried out by changing the test sterilizing disinfectant, the foaming agent and the spraying conditions as shown in Table 1.

[0015]

[Table 1] Construction number 50% benzalkonium chloride solution (kg) 1.0 0.2 1.0 1.0 0.2 Foaming agent (kg) 1.0 0.2 0.2 0.3 1.0 Water (kg) 18.0 19.6 18.7 18.8 Expansion ratio (liter / kg) 40 10 13 40 Foam condition Excellent Good Excellent Air pressure (kg / cm ² ) 1.5 1.2 1.5 1.5 1.7

Example 2 The drug used consisted of 50% glutaraldehyde and 50% water, which was diluted 10 times or 100 times to give a 0.5% or 5% solution of glutaraldehyde drug substance. So that For example, it can be obtained by dissolving 1 kg of disinfectant in 9 or 99 liters of water. Separately, 10% polyoxyethylene alkyl ether, 10% sodium lauryl sulfate, 5% 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine and 75% water were uniformly mixed. A foaming agent prepared by mixing was prepared, and 1% to 5% was added to the above diluted solution. The diluted solution thus prepared was sprayed using the apparatus shown in FIG. The foaming test was carried out by changing the test sterilizing disinfectant, the foaming agent and the spraying conditions as shown in Table 1.

[0017]

[Table 2] Construction number 50% glutaraldehyde liquid (kg) 0.2 1.0 1.0 0.2 1.0 Foaming agent (kg) 1.0 1.0 0.2 0.2 0.2 Water (kg) 18 8.8 18.0 19.6 18.8 Foaming ratio (liter / kg) 50 50 20 20 Foam condition Excellent Excellent Good Air pressure (kg / cm ² ) 1.7 1.7 1.5 1.5

Example 3 The germicidal disinfectant used consisted of 9% of dimethylbenzylammonium chloride and 9% of dimethylethylbenzylammonium chloride in total and 91% of water, and was diluted 66 times to obtain the quaternary ammonium salt drug substance. Was set to 1360 ppm. This can be obtained, for example, by dissolving in 1 kg of germicidal disinfectant and 65 liters of water. Separately, it was prepared by uniformly mixing 10% polyoxyethylene alkyl ether, 10% 2-alkyl-N-carboxymethyl-N-hydroxyethylimidazolinium betaine, 5% isopropyl alcohol and 75% water. A foaming agent was made and added to the above diluent at 1.5%.

The diluted solution thus prepared was sprayed on the operating room in the hospital using the apparatus shown in FIG. After spraying, the mixture was allowed to stand for 30 minutes, the bubbles after sterilization disappeared to become a liquid, and this liquid was removed with a vacuum cleaner having a HEPA filter built therein. As a result, the dirt on the floor surface of the dead body of organisms was removed, and since the air discharged from the HEPA filter was class 100, bacteria in the air were completely removed. Spraying conditions 9% Quaternary ammonium salt 0.3 kg (1.5%) Foaming agent 0.3 kg (1.5%) Water 19.4 kg Air pressure 1.5 kg / cm ² Spraying result Foam condition Good Spraying liquid amount 2 L / min Spraying time 10 minutes Spraying area 45 square meters As a result of foaming under the above conditions, the number of bacteria in the operating room is shown in the table below. Bacterial name No. 1 Bacillus subtilis No. 1 2 G. Micrococcus No. 3 Staphlococcus epidermidis (S. epidermidis) No. 3 4 Pseudomonas paucimobilis (Pseudomonas sp.)

[0020]

[Table 3]

[Bactericidal Efficacy Test] (1) Method 1 ml of the bacterial solution was added to 20 ml of the test solution, and 1 platinum loop was sampled in a growth medium of 9 ml at regular intervals. Next, it was cultured at 37 ° C. for 1 to 2 days to confirm the presence or absence of bacterial growth. Preparation of test solution Test solution No. Disinfectant No.1 No.2 No.3 No.4 No.5 Glutaraldehyde 2 2 2 0 0 Buffering agent 0 0.6 0.6 0 0 4 Quaternary ammonium salt 0 0 0 4 4 Foaming agent 0 0 4 0 4

[0022]

[Table 4]

[0023]

[Table 5]

From the above test results, glutaraldehyde test solution No. 1 is acidic PH3. 4, it was found that the antibacterial activity does not appear unless the pH is adjusted to 7 or more and 8.5 or less by adding a buffering agent. It was also found that the antibacterial activity did not decrease at all even when the foaming base was added.

(3) Consideration From the above test results, according to the device of the present invention, since the foaming base is added to the disinfectant and sprayed, the active agent dissolves viral epoprotein, phospholipid, etc. It can be seen that the stains are also removed, and the disinfectant disinfectant works more effectively.

[Brief description of drawings]

FIG. 1 is a schematic view showing an example of a disinfectant disinfectant spraying device of the present invention.

FIG. 2 is a schematic view showing another example of the disinfectant spraying device of the present invention.

FIG. 3 is a vertical cross-sectional view of a foam gun used in the disinfectant spraying device according to the present invention.

[Explanation of symbols]

 10 Chemical Liquid Tank 14 Foam Gun 16 Pump 24 Compressor 50 Hose 52 Nozzle 60 Pressure Cylinder 64 Compressor 72 Foam Gun 82 Hose 84 Nozzle

Claims (1)

[Scope of utility model registration request] 1. A foam gun for ejecting a sterilizing / disinfecting agent at a predetermined expansion ratio, a disinfecting solution supply means for supplying the sterilizing / disinfecting agent to the disinfecting solution supply port of the foam gun at a predetermined pressure, and the foam gun. In the sterilizing / disinfecting agent supply device having a gas supply means for supplying a gas of a predetermined pressure to the gas supply port, the foam gun has orifices (3) facing each other at both ends to which the both supply ports (38) are connected.
4) provided with a main pipe (32) and a branch pipe (48) having a disinfectant discharge port provided on a side surface of the main pipe (32) at a central position between the orifices. Disinfectant supply device.