JP2022093273A - Treatment agent for air conditioners, aerosol for air conditioners, and method for cleaning inside of air conditioner - Google Patents

Abstract

To provide a treatment agent for air conditioners that has an excellent shelf life and excellent nonflammability while maintaining washability, diffusibility of liquid chemical during spraying and antifungal properties.SOLUTION: A treatment agent for air conditioners has a stock solution composition, and a propellant, the stock solution composition containing component (A): water, component (B): a surfactant with an HLB of 6 or more, and component (C): an antifungal agent and the propellant containing component (D): HFO. With the total of the stock solution composition as 100 vol.% (25°C), the propellant is contained 15-75 vol.% (25°C), having no flash point.SELECTED DRAWING: Figure 1

Description

The present invention relates to a treatment agent for an air conditioner, an aerosol for an air conditioner, and a cleaning method in the air conditioner.

Conventionally, it has been known that when an air conditioner is used for a long period of time, dust adheres to an evaporator in the air conditioner, mold, bacteria and the like propagate, and a foul odor is generated. On the other hand, Patent Document 1 discloses a treatment agent for an air conditioner composed of alcohol and a propellant, and discloses that the source of the above-mentioned malodor can be removed.

Japanese Unexamined Patent Publication No. 2009-155438

However, the treatment agent for air conditioners disclosed in Patent Document 1 uses an organic solvent such as alcohol in order to improve the diffusivity of the liquid agent at the time of spraying and the antifungal effect, but there is a risk of ignition due to alcohol. , There was a problem in terms of safety. Furthermore, no consideration was given to storage stability.

The present invention has been made in view of the above circumstances, and provides a treatment agent for an air conditioner having storage stability and non-flammability while maintaining detergency, diffusivity of a liquid agent at the time of spraying, and antifungal property. It is to be.

The gist of the present invention will be described below.

[1] The undiluted solution composition comprises an undiluted solution composition and a propellant, and the undiluted solution composition comprises (A) component: water, (B) component: a surfactant having an HLB of 6 or more, and (C) component: an antifungal agent. The propellant contains (D) component: HFO, and the propellant is 15 to 75% by volume (25 ° C.) when the whole of the undiluted solution composition is 100% by volume (25 ° C.). A treatment agent for air conditioners that is contained in and has no ignition point.

[2] The treatment agent for an air conditioner according to [1], wherein the component (C) is an organic fungicide or an inorganic fungicide.

[3] The treatment agent for an air conditioner according to [1] or [2], which contains substantially no ethanol.

[4] The treatment agent for an air conditioner according to any one of [1] to [3], wherein the component (B) is a nonionic surfactant.

[5] The treatment for an air conditioner according to any one of [1] to [4], wherein the component (B) is contained in an amount of 0.01 to 20 parts by mass with respect to 100 parts by mass of the component (A). Agent.

[6] The treatment for an air conditioner according to any one of [1] to [5], wherein the component (C) is contained in an amount of 0.1 to 30 parts by mass with respect to 100 parts by mass of the component (A). Agent.

[7] An aerosol for an air conditioner in which the treatment agent for an air conditioner according to any one of [1] to [6] is pressure-filled in an aerosol container.

[8] The aerosol for an air conditioner according to [7], wherein the injection pressure (25 ° C.) of the aerosol container is 0.2 to 0.8 MPa.

[9] The air conditioner treatment agent according to any one of [1] to [6] or the air conditioner aerosol according to [7] or [8] is directly sprayed onto an evaporator provided in the air conditioner. How to clean the evaporator in the air conditioner.

[10] For the air conditioner treatment agent according to any one of [1] to [6] or for the air conditioner according to [7] or [8] at the inside air suction port of the blower motor fan while the air conditioner is in operation. The aerosol is sprayed, and the treatment agent for the air conditioner or the mist of the aerosol for the air conditioner sprayed by the air flow due to the inhalation of the inside air of the blower motor fan reaches the evaporator provided in the air conditioner, and the evaporator is washed. How to clean the evaporator in the air conditioner.

[11] Stop the air conditioner and use the air conditioner treatment agent according to any one of [1] to [6] or the air conditioner aerosol according to [7] or [8] from the air conditioner outlet. A method for cleaning an air conditioner pipe, which sprays the inside and causes the sprayed treatment agent for the air conditioner or mist of the aerosol for the air conditioner to reach the pipe in the air conditioner and clean the pipe.

[12] The air conditioner treatment agent according to any one of [1] to [6] or the air conditioner aerosol according to [7] or [8] is sprayed into the inside from the air conditioner outlet and sprayed. The cleaning process of the air conditioner pipe, in which the mist of the treatment agent for the air conditioner or the aerosol for the air conditioner reaches the pipe in the air conditioner and cleans the pipe.
While the air conditioner is in operation, the air conditioner treatment agent according to any one of [1] to [6] or the air conditioner aerosol according to [7] or [8] is sprayed from the inside air suction port of the blower motor fan. Then, the mist of the treatment agent for the air conditioner or the aerosol for the air conditioner sprayed by the flow of air due to the inhalation of the inside air of the blower motor fan reaches the evaporator provided in the air conditioner to clean the air conditioner. Cleaning process of the evaporator in, and cleaning method in the air conditioner including.

The present invention provides a treatment agent for an air conditioner having storage stability and non-flammability while maintaining detergency, diffusibility of the liquid agent at the time of spraying, and antifungal property.

It is a schematic diagram schematically showing an air conditioner for an automobile.

The details of the invention will be described below. The present invention is not limited to the following embodiments. In addition, in this specification, "X to Y" is used in the sense that the numerical values (X and Y) described before and after it are included as the lower limit value and the upper limit value, and means "X or more and Y or less". Further, in the present specification, unless otherwise specified, the operation and the measurement of physical properties are performed under the conditions of room temperature (20 to 25 ° C.) / relative humidity 40 to 50% RH / normal pressure (1 atm).

The treatment agent for an air conditioner of the present invention contains a stock solution composition; a propellant; the stock solution composition comprises (A) component: water, (B) component: HLB6 or higher surfactant, and ( C) component: antifungal agent, the propellant contains (D) component: HFO, and the propellant is 15 to 15 to 100% by volume (25 ° C.) of the whole undiluted composition. It is contained in 75% by volume (25 ° C.) and has no ignition point. Therefore, the treatment agent for an air conditioner in the present invention includes a stock solution composition containing the components (A) to (C) and a propellant (injection gas) containing the component (D). In one embodiment, the treatment agent for an air conditioner in the present invention is composed of a stock solution composition containing the components (A) to (C) and a propellant (injection gas) containing the component (D).

The treatment agent for an air conditioner of the present invention does not have a flash point and is non-flammable. Further, the treatment agent for an air conditioner of the present invention does not substantially contain ethanol. Here, "substantially free of ethanol" means that the content of ethanol with respect to the total mass of the undiluted solution composition is 0.01% by mass or less, preferably 0.005% by mass or less, and more preferably 0.001% by mass. % Or less. In a preferred embodiment, the treatment agent for an air conditioner of the present invention does not contain ethanol.

Here, the treatment agent for an air conditioner of the present invention is intended to be pressure-filled in a container and used as an aerosol for an air conditioner. That is, the aerosol for an air conditioner of the present invention is formed by pressure-filling a container with a treatment agent for an air conditioner.

"Undiluted composition"
The undiluted solution composition contains (A) component: water, (B) component: HLB6 or higher surfactant, and (C) component: antifungal agent. The undiluted solution composition more preferably further contains the component (E) described later.

<Ingredient (A)>
The treatment agent for an air conditioner of the present invention contains water as a component (A). The component (A) is contained in the treatment agent for an air conditioner of the present invention as a component contained in the undiluted solution composition. By combining the water as the component (A) with the other components of the present invention, the risk of ignition can be reduced because it is a treatment agent for a water-based air conditioner. The component (A) is not particularly limited, and examples thereof include distilled water. The treatment agent for an air conditioner of the present invention is non-flammable. From the viewpoint of non-flammability, the stock solution composition of the treatment agent for an air conditioner preferably contains substantially no ethanol, more preferably contains no ethanol, and further preferably contains no organic solvent. It is preferable that it does not contain an organic solvent. Here, "substantially free of organic solvent" means that the content of the organic solvent with respect to the total mass of the undiluted solution composition is 0.01% by mass or less, preferably 0.005% by mass or less, more preferably 0. It means the case where it is 001 mass% or less. In the present specification, the organic solvent means a component that is liquid at 25 ° C. other than the components (A) to (D). The non-flammability is evaluated in accordance with JIS K 2265 (2007 version).

<Ingredient (B)>
The treatment agent for an air conditioner of the present invention contains a surfactant having an HLB of 6 or more as the component (B). The component (B) is contained in the treatment agent for an air conditioner of the present invention as a component contained in the undiluted solution composition. When the HLB is less than 6, the compatibility between the components becomes poor and the storage stability becomes poor. The component (B) is preferably a surfactant having an HLB of 6 to 20, more preferably a surfactant having an HLB of 6 to 17, still more preferably a surfactant having an HLB of 7 to 15, and particularly preferably. It is a surfactant of HLB7-13. By using the component (B) in combination with the other components of the present invention, a treatment agent for an air conditioner having excellent detergency and storage stability can be obtained. Examples of the surfactant of the component (B) include a cationic surfactant, an anionic surfactant, an amphoteric surfactant, a nonionic surfactant and the like. As the surfactant of the component (B), a nonionic surfactant is preferable because the storage stability is further improved. As the component (B), an HLB6 or higher surfactant may be used alone, or two or more HLB6 or higher surfactants may be used in combination. The HLB in the present invention means the hydrophilic-lipophilic balance of the surfactant, and is a value obtained based on the Griffin method.

Examples of the nonionic surfactant include polyoxyethylene alkyl ether, polyoxyethylene polyoxypropylene alkyl ether, polyoxyethylene alkyl phenyl ether, polyoxyethylene higher fatty acid ester, polyoxyethylene sorbitan fatty acid ester, and polyoxyethylene glycerin fatty acid. Examples thereof include esters, and among them, polyoxyethylene alkyl ethers and polyoxyethylene polyoxypropylene alkyl ethers are preferable from the viewpoint of excellent detergency and storage stability. For example, when the component (B) is selected from a polyoxyethylene alkyl ether having an HLB of 6 or more and a polyoxyethylene polyoxypropylene alkyl ether, the alkyl group of the alkyl ether moiety is preferably 10 to 18 carbon atoms, more preferably. Has 12 to 16 carbon atoms. The number of moles of oxyethylene groups added to the polyoxyethylene alkyl ether (B) having an HLB of 6 or more and the polyoxyethylene polyoxypropylene alkyl ether is not particularly limited as long as the HLB is 6 or more. For example, in the case of a polyoxyethylene alkyl ether having an alkyl group having 10 to 18 carbon atoms (preferably 12 to 16 carbon atoms, more preferably 12 to 14 carbon atoms), the number of moles of the oxyethylene group added is 2 to 30. It is preferably 2 to 20, more preferably 2 to 10, and particularly preferably 3 to 8. Further, for example, in the case of a polyoxyethylene polyoxypropylene alkyl ether having an alkyl group having 10 to 18 carbon atoms (preferably 12 to 18 carbon atoms, more preferably 12 to 16 carbon atoms), an oxyethylene group and an oxypropylene group. The ratio of the oxyethylene group to the total of is preferably 50 mol% or more, more preferably 60 mol% or more, still more preferably 65 mol% or more, and particularly preferably 70 mol%. Further, in the case of a polyoxyethylene polyoxypropylene alkyl ether having an alkyl group having 10 to 18 carbon atoms (preferably 12 to 18 carbon atoms, more preferably 12 to 16 carbon atoms), the number of moles of the oxyethylene group added is 2. It is preferably to 40, more preferably 5 to 35, even more preferably 10 to 30, and particularly preferably 15 to 25; the number of moles of the oxypropylene group added is 2 to 20. It is preferably present, more preferably 3 to 15, further preferably 4 to 12, and particularly preferably 5 to 10.

As the surfactant having an HLB of 6 or more as the component (B), it may be synthesized by a known method or a commercially available product. Examples of commercially available products include NIKKOL BT series manufactured by Nikko Chemical Co., Ltd. (NIKKOL BT-3 (HLB = 8.0), NIKKOL BT-5 (HLB = 10.5), NIKKOL BT-7 (HLB = 12.0). ), NIKKOL BT-9 (HLB = 13.5), NIKKOL BT-12 (HLB = 14.5), NIKKOL BT-12 (HLB = 14.5)); NIKKOL BB series (NIKKOL BB-5 (HLB =) 7.0), NIKKOL BB-10 (HLB = 10.0), NIKKOL BB-20 (HLB = 16.5), NIKKOL BB-30 (HLB = 18.0)); NIKKOL BC series (NIKKOL BC-5) .5 (HLB = 10.5), NIKKOL BC-7 (HLB = 11.5), NIKKOL BC-10 (HLB = 11.5), NIKKOL BC-15 (HLB = 15.5),); NIKKOL BL Series (NIKKOL BL-4.2 (HLB = 11.5), NIKKOL BL-9EX (HLB = 14.5), NIKKOL BL-10 (HLB = 11.5); NIKKOL PBC series (NIKKOL PBC-33 (HLB)) = 10.5), NIKKOL PBC-34 (HLB = 16.5), NIKKOL PBC-44 (HLB = 12.5); and the like.

The amount of the component (B) added is not particularly limited, but is, for example, 0.01 to 20 parts by mass, more preferably 0.05 to 10 parts by mass with respect to 100 parts by mass of the component (A). It is more preferably 0.08 to 8 parts by mass, particularly preferably 0.1 to 5 parts by mass, and most preferably 0.15 to 3 parts by mass. By setting the content of the component (B) in the above range, the emulsifying property is excellent, so that a treatment agent for an air conditioner having further excellent detergency and storage stability can be obtained. When two or more kinds of the component (B) are combined, the blending amount of the component (B) is the total amount.

<Ingredient (C)>
The treatment agent for an air conditioner of the present invention contains a fungicide as a component (C). The component (C) is contained in the treatment agent for an air conditioner of the present invention as a component contained in the undiluted solution composition. In the undiluted solution composition of the treatment agent for an air conditioner of the present invention, by adding an antifungal agent as the component (C), it is possible to impart antifungal properties while maintaining detergency and non-flammability. .. Examples of the component (C) include an organic fungicide and an inorganic fungicide. Examples of the organic fungicide include isothiazolin-based compounds, pyrithione-based compounds, mercaptopyridine oxide compounds, and the like, and among them, mercaptopyridine oxide compounds are preferable. Examples of the inorganic fungicide include silver-supported inorganic fungicides. As the component (C), one kind of antifungal agent may be used alone, or two or more kinds of antifungal agents may be used in combination. In the present invention, it is preferable to use an organic antifungal agent and an inorganic antifungal agent in combination because an antifungal effect can be obtained in a wide range of molds. More preferably, a silver-supported inorganic fungicide and a mercaptopyridine oxide compound are used in combination.

The blending amount of the component (C) in the present invention is preferably 0.1 to 30 parts by mass, more preferably 0.3 to 20 parts by mass, and further preferably 0 with respect to 100 parts by mass of the component (A). It is .4 to 10 parts by mass, particularly preferably 0.5 to 8 parts by mass, and most preferably 0.7 to 5 parts by mass. By setting it within the above range in the present invention, it is preferable because the antifungal property and the detergency can be further maintained. When two or more kinds of the component (C) are combined, the blending amount of the component (C) is the total amount.

"Sprayer"
The treatment agent for an air conditioner of the present invention contains a propellant. In the treatment agent for an air conditioner of the present invention, the blending ratio of the propellant is preferably 15 to 75% by volume, more preferably 20 to 70% by volume, when the total volume of the undiluted solution composition is 100% by volume. Yes, more preferably 25-60% by volume, and particularly preferably 30-55% by volume. Within the above range, it is possible to perform fine spraying despite the treatment agent for a water-based air conditioner, and the diffusivity of the liquid agent at the time of spraying is excellent. When two or more kinds of propellants are combined, the blending amount of the propellants is the total amount. Here, the volume of the propellant is the total amount including the gas and the liquefied gas (liquid).

<(D) component>
In the treatment agent for an air conditioner of the present invention, the propellant contains HFO (hydrofluoroolefin) as the component (D). HFO means an unsaturated organic compound composed of hydrogen, fluorine and carbon, and can be used as a propellant. By combining the component (D) with the other components of the present invention, a treatment agent for an air conditioner having storage stability and non-flammability while maintaining detergency, diffusivity of the liquid agent at the time of spraying, and antifungal property is obtained. be able to.

Here, as the HFO, a compound having 3 or more and 8 or less fluorine atoms in the molecule is preferable, a compound having 4 or more and 7 or less fluorine atoms in the molecule is more preferable, and 4 or more in the molecule. A compound having 6 or less fluorine atoms is more preferable, and a compound having 4 fluorine atoms in the molecule is particularly preferable. The presence of a fluorine atom in the HFO molecule within the above range further exerts the desired effect of the present invention.

Examples of the HFO as the component (D) include 2,3,3,3-tetrafluoropropene, (E) -1,3,3,3-tetrafluoropropene, and (E) -1,1,1,1. Examples thereof include 4,4,4-hexafluoro-2-butene and (E) -1,1,1,4,4,4-hexafluoro-2-butene. Of these, as the HFO, (E) -1,3,3,3-tetrafluoropropene is preferable. As the component (D), one kind of HFO may be used alone, or two or more kinds of HFOs may be used in combination. The commercially available product of the component (D) is not particularly limited, and examples thereof include HFO-1234ze manufactured by Central Glass and Honeywell HFO-1234ze. The HFO contained as the component (D) of the present invention is preferably a chlorine-free compound. Further, in the present invention, it is preferable that the propellant does not contain chlorine.

In one embodiment of the present invention, the propellant is composed of the component (D). That is, in one embodiment, the propellant contains substantially no substance other than the component (D). In this case, the blending ratio of the component (D) is preferably 15 to 75% by volume, more preferably 20 to 70% by volume, and even more preferably 20% by volume, when the total volume of the undiluted solution composition is 100% by volume. , 25-60% by volume, particularly preferably 30-55% by volume. Within the above range, it is possible to perform fine spraying despite the treatment agent for a water-based air conditioner, and the diffusivity of the liquid agent at the time of spraying is excellent. When two or more kinds of the component (D) are combined, the blending amount of the component (D) is the total amount. Here, the volume of the component (D) is the total amount including the gas and the liquefied gas (liquid). When the content of the component (D) with respect to the undiluted solution composition is within the above range, the treatment agent for an air conditioner of the present invention has the component (D) compatible with the undiluted solution composition in an appropriate range in an aerosol container. It can be discharged at an appropriate injection pressure at the time of spraying, which leads to preferable diffusivity of the liquid agent at the time of spraying.

That is, the treatment agent for an air conditioner of the present invention contains the undiluted solution composition and the propellant in a volume ratio (25 ° C.) of undiluted solution composition: propellant = 100: 15 to 100: 75. Further, according to one embodiment of the present invention, the undiluted solution composition and the propellant are mixed at a volume ratio (25 ° C.) of undiluted solution composition: propellant = 100: 15 to 100: 75. A method for producing a treatment agent for an air conditioner is also provided.

Further, as the propellant, in addition to the component (D) component: HFO, another propellant may be used in combination. Examples of the propellant used together with HFO include carbon dioxide gas, _N2 gas, rare gas and the like, and one or more of these can be used. When the component (D) contains a propellant other than HFO as the propellant, and the propellant is a mixture, the mixing ratio (volume ratio) of HFO: other propellant is 100: 0 in a gaseous state (25 ° C.). It is preferably from 80:20, more preferably 99.99: 0.01 to 90:10, even more preferably 99.99: 0.01 to 95: 5, 99.99: 0.01 to 90:10. It is particularly preferably 0.01 to 98: 2. In one embodiment, the propellant is substantially free of substances (propellants) other than component (D). This is because the inclusion of the component (D) as the propellant can impart favorable diffusivity of the liquid agent at the time of spraying.

<(E) component>
Further, by adding a rust preventive as the component (E) to the undiluted solution composition of the treatment agent for an air conditioner of the present invention, rust preventive properties can be imparted while maintaining detergency and non-flammability. .. Examples of the rust preventive include a boron-based rust inhibitor, a benzotriazole-based rust inhibitor, an ammonium salt-based rust inhibitor, a benzoic acid-based rust inhibitor, and the like. Among them, a boron-based rust inhibitor and a benzotriazole-based rust inhibitor. Rust agents are preferred. Examples of commercially available products of the component (E) include SYNKAD202 manufactured by ICC CHEMICAL.

The blending amount of the component (E) in the present invention is preferably 0.001 to 10 parts by mass, more preferably 0.005 to 5 parts by mass, and further, with respect to 100 parts by mass of the component (A). It is preferably 0.007 to 3 parts by mass, particularly preferably 0.01 to 1 part by mass, and most preferably 0.01 to 0.5 part by mass. By setting it within the above range in the present invention, it is possible to obtain a treatment agent for an air conditioner which is further excellent in rust prevention while maintaining detergency and non-flammability.

<Arbitrary ingredient>
For the treatment agent for air conditioner of the present invention, a defoaming agent, a deodorant, a storage stabilizer, an antioxidant, a light stabilizer, a plasticizer, a solvent, a pigment, a dye, as long as the object of the present invention is not impaired. Additives such as flame retardants can be used. From the viewpoint of non-flammability, the treatment agent for an air conditioner of the present invention preferably contains substantially no ethanol, more preferably does not contain ethanol, and further preferably contains no organic solvent. It is preferable that it does not contain an organic solvent.

<Aerosol for air conditioner>
The aerosol for an air conditioner of the present invention is produced by filling an aerosol container such as steel or aluminum with a stock solution composition and a propellant by a known method, and is used as an aerosol form. That is, the treatment agent for an air conditioner of the present invention is preferably an aerosol for an air conditioner used by pressurizing and filling an aerosol container. Unless the object of the present invention is impaired, not only the composition of the undiluted solution composition, but also the injection amount of the contents, the spray / injection form, the pressure in the aerosol container, the injection hole diameter in the valve of the aerosol container, the diameter of the stem passage, etc. Can be appropriately selected and used according to the purpose by appropriately setting. The injection form is not particularly limited, and examples thereof include a foam shape and a mist shape, and among them, the mist shape is preferable. The mist-like shape makes it possible to prevent mold inside the outlet as well as the evaporator.

In the aerosol for an air conditioner of the present invention, it is preferable to pressurize and fill the propellant so that the jet pressure (25 ° C.) of the aerosol container is 0.2 to 0.8 MPa. The injection pressure (25 ° C.) of the aerosol container when the propellant is pressure-filled is more preferably 0.3 to 0.6 MPa, still more preferably 0.4 to 0.6 MPa, still more preferably 0.4 to 0.6 MPa. It is 0.45 to 0.55 MPa, and particularly preferably 0.51 to 0.55 MPa. Within the above range, sufficient pressure as an aerosol for an air conditioner can be secured, and the undiluted solution composition can be ejected in the form of a fine mist. The injection pressure of the aerosol container can be set by adjusting the filling amount of the undiluted solution composition and the propellant. As a point to be noted at the time of the adjustment, when the filling amount of the undiluted solution composition with respect to the capacity of the aerosol container is small, a desirable injection pressure can be secured by increasing the filling ratio of the propellant. As the filling method for the aerosol container, a conventionally known method can be adopted. For example, a tin or aluminum pressure-resistant container is filled with the undiluted solution composition in advance, sealed with a lid with a valve (valve), and then the compressed propellant is injected through the valve. The aerosol container can be filled.

In the present invention, the undiluted solution composition and the propellant are filled in the aerosol container at a volume ratio (25 ° C.) of the undiluted solution composition: propellant = 100: 15 to 100: 75 to form an aerosol container. The injection pressure (25 ° C.) is 0.2 to 0.8 MPa. Therefore, according to the present invention, an air conditioner that fills an aerosol container with a stock solution composition and a propellant at a volume ratio (25 ° C.) of a stock solution composition: propellant = 100: 15 to 100: 75. A method for producing an aerosol for use is also provided.

The air conditioner aerosol of the present invention is a form in which the air conditioner treatment agent of the present invention is filled in an aerosol container, and has the same configuration as the air conditioner treatment agent of the present invention. That is, in the aerosol for an air conditioner of the present invention, the undiluted solution composition and the propellant are filled in an aerosol container, and the undiluted solution composition has an interface between (A) component: water and (B) component: HLB 6 or more. The propellant contains an activator and a component (C): an antifungal agent, and the propellant contains a component (D): HFO (hydrofluoroolefin), and the entire undiluted composition is 100% by volume (25 ° C.). , The propellant is contained in an amount of 15 to 75% by volume (25 ° C.) and has no ignition point. With this configuration, the aerosol for an air conditioner of the present invention, like the treatment agent for an air conditioner of the present invention, maintains detergency, diffusivity of the liquid agent at the time of spraying, and antifungal properties, and is storable and non-flammable. Has.

The treatment agent for an air conditioner of the present invention and the aerosol for an air conditioner of the present invention are suitably used for cleaning an air conditioner for an automobile, and are particularly suitable for cleaning an evaporator provided in an air conditioner for an automobile. Used for. Here, a preferred embodiment in which the treatment agent for an air conditioner of the present invention and the aerosol of the present invention are used will be described.

<How to clean the evaporator>
According to the present invention, there is also provided a method for cleaning an evaporator using the treatment agent for an air conditioner of the present invention and the aerosol for an air conditioner of the present invention.

Here, first, an air conditioner for an automobile in which the aerosol for an air conditioner of the present invention is used will be described. FIG. 1 is a schematic diagram schematically showing an air conditioner 10 for an automobile. The air conditioner 10 will be described with reference to FIG.

The automobile air conditioner 10 includes a blower motor fan 11, an evaporator 12, and a heater 13 in a pipe 20.

One end of the pipe 20 is branched into the pipe 21 and the pipe 22, the pipe 21 which is the branched end is provided at the inside air suction port 31 provided inside the vehicle, and the pipe 22 which is the other end of the branch is provided outside the vehicle. It is connected to each of the outside air suction ports 32. A valve 31a is provided at a branch point between the pipe 21 and the pipe 22, and the valve 31a can switch between opening and closing the pipes 21 and 22. In FIG. 1, the valve 31a closes the pipe 22 side, and the outside air suction port 32 is separated from the pipe 20. When the valve 31a closes the pipe 21 side, the pipe 20 is separated from the pipe 21, and the inside air suction port 31 is separated from the pipe 20.

The other end of the pipe 20 is branched into a plurality of pipes 23, and each of the pipes 23 is connected to an outlet 33 provided in the vehicle. Inside the pipe 20, there are an air suction passage 34 from the inside air suction port 31 and the outside air suction port 32 to the evaporator 12, a temperature control passage 35 from the evaporator to the heater, and an air outlet passage 36 from the heater 13 to the outlet 33. It is composed of.

The pipe 20 is provided with a drain 24 at the bottom of the evaporator 12.

The blower motor fan 11 can take in the air inside the vehicle from the inside air suction port 31, and can take in the air outside the vehicle from the outside air suction port 32. When the blower motor fan 11 operates to take in air, air is taken in by the inside air suction port 31 or the outside air suction port 32, and the taken-in air passes through the air suction passage 34 and the temperature control passage 35. ..

The evaporator 12 is cooled by a refrigeration cycle device (not shown). The heater 13 is heated by the operation of an engine (not shown). In the temperature control passage 35, the air that has passed through the evaporator 12 (surface) is cooled, and the air that has passed through the evaporator 12 (surface) is mixed with the air that has passed through the heater 13 (surface) so as to have a predetermined temperature. It is blown out from the air outlet 33 through the air outlet passage 36. In the temperature control passage 35, the moisture generated by cooling the air in the evaporator 12 is discharged from the drain 24 provided in the lower part of the evaporator 12.

The method for cleaning the evaporator of the present invention is not particularly limited, and for example, (1) the air conditioner that directly sprays the treatment agent for the air conditioner or the aerosol for the air conditioner of the present invention onto the evaporator provided in the air conditioner. How to clean the evaporator inside (2) Spray the treatment agent for air conditioner or the aerosol for air conditioner on the inside air suction port of the blower motor fan while the air conditioner is operating, and by the air flow by sucking the inside air of the blower motor fan. Examples thereof include a method of cleaning the evaporator in the air conditioner by causing the sprayed treatment agent for the air conditioner or the mist of the aerosol for the air conditioner to reach the evaporator provided in the air conditioner and cleaning the evaporator. The air flow can be obtained, for example, by rotating the blower motor fan.

In addition, (3) stop the air conditioner, stop the air conditioner, spray the air conditioner treatment agent or the air conditioner aerosol into the inside from the air conditioner outlet, and spray the air conditioner treatment agent or Examples include a method of cleaning the air conditioner pipe by allowing the mist of the air conditioner aerosol to reach the pipe in the air conditioner and cleaning the pipe. Here, the pipe corresponds to the air blowing passage 36 in FIG.

Among them, since the antifungal property is particularly excellent, the treatment agent for an air conditioner or the aerosol for an air conditioner of the present invention is sprayed into the inside from the air outlet of the air conditioner, and the sprayed treatment agent for the air conditioner or the aerosol for the air conditioner is sprayed. The mist of the air conditioner reaches the pipes in the air conditioner and cleans the pipes. The air conditioner aerosol is sprayed, and the air conditioner treatment agent or the air conditioner aerosol mist sprayed by the air flow by inhaling the inside air of the blower motor fan reaches the evaporator provided in the air conditioner to clean the evaporator. A cleaning step of the evaporator in the air conditioner and a cleaning method in the air conditioner including the cleaning method are preferable.

Hereinafter, the present invention will be described in more detail with reference to examples, but the present invention is not limited to these examples. Further, in the following examples, unless otherwise specified, the operation and the measurement of physical properties shall be performed under the conditions of room temperature (20 ° C. or higher and 25 ° C. or lower) / relative humidity of 40% RH or higher and 50% RH or lower.

<Preparation of aerosol for air conditioner>
-Example 1
100 parts by mass of purified water (80B manufactured by Nippon Philite Co., Ltd.) as the component (a1) of the component (A) of the present invention.
0.30 parts by mass of a surfactant (NIKKOL BT-3 manufactured by Nikko Chemicals Co., Ltd.) containing HLB 8.0 containing polyoxyethylene alkyl ether as the component (b1) of the component (B).
As the component (c1) of the component (C), 1.00 parts by mass of a composite antifungal agent of a silver-supported inorganic system and a mercaptopyridine oxide system,
As the component (e1) of the component (E), 0.02 parts by mass of a boron-based rust inhibitor (SYNKAD202 manufactured by ICC CHEMICAL) and
Was added and mixed in a mixer at 25 ° C. for 60 minutes to prepare a liquid stock solution composition at 25 ° C.

Next, with respect to the undiluted solution composition thus prepared, (E) -1,3,3,3-tetrafluoropropene (hydrofluoroolefin-based) (central glass) was used as the (d1) component of the (D) component. 1234ZE) manufactured by Co., Ltd. is filled with a propellant that becomes 30% by volume (injection pressure 0.51 MPa at 25 ° C.) when the total volume of the undiluted solution composition is 100%, and is filled in a 100 cm ³ test aerosol container. did. As a result, Example 1 was obtained, which is an aerosol for an air conditioner in which a container is pressure-filled with a treatment agent for an air conditioner.

Here, in the present invention, the injection pressure of the prepared aerosol is a value measured and calculated according to JIS S 3301 (2018).

-Example 2
In Example 1, the component (d1) was prepared in the same manner as in Example 1 except that the component (d1) was changed from 30% by volume to 40% by volume (injection pressure at 25 ° C. 0.52 MPa), and the treatment agent for the air conditioner was prepared. Example 2 was obtained, which is an aerosol for an air conditioner filled under pressure in a container.

-Example 3
In Example 1, the component (d1) was prepared in the same manner as in Example 1 except that the component (d1) was changed from 30% by volume to 50% by volume (injection pressure at 25 ° C. 0.52 MPa), and the treatment agent for the air conditioner was prepared. Example 3 was obtained, which is an aerosol for an air conditioner filled under pressure in a container.

-Example 4
In Example 1, except that the component (b1) was changed to a surfactant (NIKKOL PBC-44 manufactured by Nikko Chemicals Co., Ltd.) (b2) which is HLB12.5 containing polyoxyethylene polyoxypropylene alkyl ether. , And prepared in the same manner as in Example 1 to obtain Example 4 which is an air conditioner aerosol prepared by pressurizing and filling a container with an air conditioner treatment agent.

-Comparative example 1
In Example 1, the component (d1) was prepared in the same manner as in Example 1 except that the component (d1) was changed from 30% by volume to 12% by volume (injection pressure at 25 ° C. was 0.50 MPa), and the treatment agent for the air conditioner was prepared. Comparative Example 1 which is an aerosol for an air conditioner filled under pressure in a container was obtained.

-Comparative example 2
For an air conditioner prepared in the same manner as in Example 1 except that the component (d1) was changed to the nitrogen gas (d'1) component in Example 1 and the container was pressure-filled with a treatment agent for an air conditioner. Comparative Example 2 which is an aerosol was obtained.

-Comparative example 3
In Example 1, the preparation was carried out in the same manner as in Example 1 except that the component (a1) was changed from 100 parts by mass to 30 parts by mass and ethanol was added as a component (a'1) in an amount of 70 parts by mass. Comparative Example 3 was obtained, which is an aerosol for an air conditioner in which the treatment agent for an air conditioner was pressure-filled in a container.

-Comparative example 4
Same as Example 1 except that the component (b1) was changed to a surfactant (NIKKOL SO-10V manufactured by Nikko Chemicals Co., Ltd.) (b'1) containing sorbitan oleate and HLB4.3. Comparative Example 4 was obtained, which was an aerosol for an air conditioner in which a container was pressure-filled with a treatment agent for an air conditioner.

Table 1 summarizes the results of the test methods of the following tests (1) to (5) in Examples and Comparative Examples. The following test was performed using the automobile air conditioner shown in FIG.

<(1) Detergency>
Without rotating the blower motor fan 11 of the car, the air was sprayed from the air outlet 33 of the air conditioner provided in the car toward the inside using the aerosol for each air conditioner for 10 seconds. Next, while rotating the blower motor fan 11 of the car, each aerosol is sprayed on the inside air suction port 31 of the blower motor fan 11 for 100 seconds, and within 10 minutes after the spraying, it is provided at the lower part of the evaporator 12. The liquid flowing down from the drain 24 was visually evaluated based on the following criteria. The results are shown in Table 1. In the present invention, it is preferable that impurities such as dust and dirt are recognized together with the liquid. In addition, "-" in Table 1 means not evaluated. The car used in this test was a new car that had been ridden for 3 years (mileage 30,000 km) after being purchased.

Evaluation Criteria ○: Impurities such as dust and dirt are recognized along with the liquid.
X: Impurities such as dust and dirt are not observed together with the liquid.

<(2) Antifungal property 1>
Without rotating the blower motor fan 11 of the car, the air was sprayed from the air outlet 33 of the air conditioner provided in the car toward the inside using the aerosol for each air conditioner for 10 seconds. Next, the potato dextrose agar medium was exposed to the outlet 33 for 5 minutes with the air volume of the car air conditioner maximized, and then cultured at 25 ° C. and 55% RH for 3 days and 7 days, and then the mold growth was visually observed. Was evaluated based on the following evaluation criteria. The results are shown in Table 1 (based on JIS Z 2911 (2018 edition)). In the present invention, it is preferable that no mold growth is observed after 3 days of curing, and more preferably, no mold growth is observed even after 7 days of curing. In addition, "-" in Table 1 means not evaluated. The car used in this test was a new car that had been ridden for 3 years (mileage 30,000 km) after being purchased.

Evaluation Criteria ⊚: No mold growth was observed even after 7 days of curing.
◯: No mold growth was observed after 3 days of curing, but mold growth was observed after 7 days of curing.
X: Mold growth is observed after curing for 3 days.

<(3) Diffusivity of liquid agent at the time of spraying>
Using each air conditioner aerosol, the spread of the liquid when sprayed on a 50 cm × 50 cm iron plate to be cleaned at a distance of 15 cm for 1 second was visually evaluated. It was judged whether or not the spread of 30 cm × 30 cm or more was confirmed. The evaluation criteria are as follows. The results are shown in Table 1. In the present invention, it is preferable that it is widened from the viewpoint of workability. In addition, "-" in Table 1 means not evaluated.

Evaluation criteria ○: There is an spread of 30 cm x 30 cm or more.
×: No spread of 30 cm × 30 cm or more.

<(4) Non-flammable>
The presence or absence of a flash point of each air conditioner aerosol (air conditioner treatment agent) was evaluated based on the following evaluation criteria. The results are shown in Table 1 (based on JIS K 2265 (2007 version)). The aerosol for an air conditioner (treatment agent for an air conditioner) of the present invention has no flash point. That is, the aerosol for an air conditioner (treatment agent for an air conditioner) of the present invention is non-flammable.

Evaluation criteria ○: No flash point ×: With flash point.

<(5) Preservability>
Each air conditioner aerosol was left at 25 ° C. for 1 week, and then the state of the sample sprayed from each air conditioner aerosol for 1 second was visually evaluated based on the following criteria. The results are shown in Table 1. In the present invention, it is preferable that no floating or precipitation of the precipitate is observed. In addition, "-" in Table 1 means not evaluated.

Evaluation Criteria ◯: No floating or precipitation of precipitates is observed ×: Floating or precipitation of precipitates is observed.

According to Examples 1 to 4 in Table 1, the present invention is an aerosol for an air conditioner (air conditioner) having storage stability and non-flammability while maintaining detergency, diffusivity of the liquid agent at the time of spraying, and mold resistance. It can be seen that it provides a treatment agent).

Further, Comparative Example 1 in Table 1 is an aerosol in which a predetermined amount of the component (D) of the present invention is not filled, but the result is that the diffusivity of the liquid agent at the time of spraying is inferior. Further, Comparative Example 2 was an aerosol for an air conditioner using the component (d'1) instead of the component (D) of the present invention, but the result was that the diffusivity of the liquid agent at the time of spraying was inferior. Further, Comparative Example 3 was an aerosol containing ethanol, but the result was inferior in terms of non-flammability. Further, Comparative Example 4 was an aerosol for an air conditioner in which the component (b'1) was used instead of the component (B) of the present invention, but the result was inferior in storage stability.

Further, using Example 2 or Example 4, the antifungal property 2 was tested by changing the cleaning method with an aerosol.

<(6) Antifungal property 2>
The blower motor fan 11 of the car was not rotated, and the air outlet 33 of the car was sprayed with the aerosol for the air conditioner of Example 2 or 4 for 10 seconds. Next, while rotating the blower motor fan 11 of the car, the aerosol for the air conditioner of Example 2 or 4 was sprayed on the inside air suction port 31 of the blower motor fan 11 for 100 seconds. Then, with the air volume of the air conditioner of the car maximized, the medium of potato dextrose agar was exposed to the outlet 33 for 5 minutes, and then cultured at 25 ° C. and 55% RH for 3 days and 7 days, and then the mold growth was visually observed. Evaluation was made based on the following evaluation criteria. The results are shown in Table 2 (based on JIS Z 2911 (2018 version)). In the present invention, it is preferable that no mold growth is observed after 3 days of curing, and more preferably, no mold growth is observed even after 7 days of curing.

Evaluation Criteria ⊚: No mold growth was observed even after 7 days of curing.
◯: No mold growth was observed after 3 days of curing, but mold growth was observed after 7 days of curing.
X: Mold growth is observed after curing for 3 days.

From the results of Examples 2 and 4 in Table 2, it was found that the method of cleaning both the air outlet and the inside air inlet of the car with the aerosol of Examples 2 and 4 is particularly excellent in antifungal property.

This application is based on Japanese Patent Application No. 2020-205753 filed on December 11, 2020, the entire disclosure of which is incorporated herein by reference in its entirety.

The present invention is a treatment agent for air conditioners and an aerosol for air conditioners, which have storage stability and non-flammability while maintaining detergency, diffusivity of liquids at the time of spraying, and antifungal properties. It is industrially useful because it can be used in conditioners and commercial air conditioners.

10 Automotive air conditioner 11 Blower motor fan 12 Evaporator 13 Heater 20, 21, 22, 23 Piping 24 Drain 31 Inside air intake port 31a Valve 32 Outside air intake port 33 Air outlet 34 Air intake passage 35 Temperature control passage 36 Air outlet passage

Claims (12)

Containing the undiluted composition and the propellant,
The undiluted solution composition contains (A) component: water, (B) component: a surfactant having an HLB of 6 or more, and (C) component: an antifungal agent.
The propellant contains (D) component: HFO (hydrofluoroolefin).
When the whole of the undiluted solution composition is 100% by volume (25 ° C.), the propellant is contained in 15 to 75% by volume (25 ° C.).
A treatment agent for air conditioners that does not have a flash point. The treatment agent for an air conditioner according to claim 1, wherein the component (C) is an organic antifungal agent or an inorganic antifungal agent. The treatment agent for an air conditioner according to claim 1 or 2, which is substantially free of ethanol. The treatment agent for an air conditioner according to any one of claims 1 to 3, wherein the component (B) is a nonionic surfactant. The treatment agent for an air conditioner according to any one of claims 1 to 4, wherein the component (B) is contained in an amount of 0.01 to 20 parts by mass with respect to 100 parts by mass of the component (A). The treatment agent for an air conditioner according to any one of claims 1 to 5, wherein the component (C) is contained in an amount of 0.1 to 30 parts by mass with respect to 100 parts by mass of the component (A). An aerosol for an air conditioner in which the treatment agent for an air conditioner according to any one of claims 1 to 6 is pressure-filled in an aerosol container. The aerosol for an air conditioner according to claim 7, wherein the injection pressure (25 ° C.) of the aerosol container is 0.2 to 0.8 MPa. The treatment agent for an air conditioner according to any one of claims 1 to 6 or the aerosol for an air conditioner according to claim 7 or 8 is directly sprayed onto an evaporator provided in the air conditioner to clean the evaporator. , How to clean the evaporator in the air conditioner. While the air conditioner is in operation, the air conditioner treatment agent according to any one of claims 1 to 6 or the air conditioner aerosol according to claim 7 or 8 is sprayed onto the inside air suction port of the blower motor fan. In the air conditioner, the mist of the air conditioner treatment agent or the air conditioner aerosol sprayed by the air flow due to the inhalation of the inside air of the blower motor fan reaches the evaporator provided in the air conditioner and cleans the air conditioner. How to clean the air conditioner. The air conditioner is stopped, and the air conditioner treatment agent according to any one of claims 1 to 6 or the air conditioner aerosol according to claim 7 or 8 is sprayed into the inside from the air conditioner outlet. A method for cleaning an air conditioner pipe, wherein the sprayed treatment agent for the air conditioner or mist of the aerosol for the air conditioner reaches the pipe in the air conditioner and cleans the pipe.
The air conditioner treatment agent according to any one of claims 1 to 6 or the air conditioner aerosol according to claim 7 or 8 is sprayed into the inside from the air outlet of the air conditioner, and the sprayed air conditioner is used. The cleaning process of the air conditioner pipe, in which the mist of the treatment agent or the aerosol for the air conditioner reaches the pipe in the air conditioner and cleans the pipe.
While the air conditioner is in operation, the air conditioner treatment agent according to any one of claims 1 to 6 or the air conditioner aerosol according to claim 7 or 8 is sprayed from the inside air suction port of the blower motor fan. In the air conditioner, the mist of the air conditioner treatment agent or the air conditioner aerosol sprayed by the air flow due to the inhalation of the inside air of the blower motor fan reaches the evaporator provided in the air conditioner and cleans the air conditioner. Cleaning process of the evaporator and cleaning method in the air conditioner including.

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