JP2001086919A - Liquid sucking wick of chemical fluid volatilizing container - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a liquid sucking wick without leaking out a chemical fluid even when a chemical fluid volatilizing container is laid or turned upside down by mistake. SOLUTION: This liquid sucking wick 4 of the chemical fluid volatilizing container 2 is held with an inner plug 3 fitted to a mouth part 2a of the chemical volatilizing container 2 and provided with ventilating grooves comprising fine unevennesses communicating with the upper and lower parts in at least a part of the outer peripheral surface of the liquid sucking wick 4. The depth of the ventilating grooves is within the range of 3-250 μm. A chemical such as a flavoring agent, an insecticide, a repellent, an acaricide, a fungicide and a deodorant is volatilized into air.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a liquid evaporating container for use in a liquid evaporating apparatus for evaporating chemicals such as fragrance, insecticide, repellent, acaricide, fungicide and deodorant into the air. It relates to the liquid core.

[0002]

2. Description of the Related Art A chemical liquid is supplied to a core by immersing a part of a porous liquid absorbent core in the chemical liquid, and the liquid chemical is evaporated by heating an upper part of the core to evaporate the liquid chemical absorbed. The scheme is known.

[0003] As the porous absorbent core, clay, talc, kaolin, perlite, diatomaceous earth, gypsum, bentonite, glass fiber, asbestos, silica,
An inorganic powder and / or an organic powder, such as alumina, silica alumina, wood flour, activated carbon, cellulose, pulp, and linter, fixed and molded with a paste such as starch or carboxymethyl cellulose are used. Such a liquid-absorbing core is microporous and has a relatively good liquid-absorbing property. However, when the above-described liquid absorbent core is used, the internal pressure in the container is increased due to the expansion of the liquid chemical at the time of a change in temperature or atmospheric pressure, and as a result, the liquid chemical is pushed up in the liquid absorbent core, and liquid leakage is likely to occur. There is a problem that.

[0004] In order to improve such a disadvantage, as shown in Fig. 6, an insecticidal apparatus provided with a notch d for communicating between the inside and outside of a container is provided at an edge c of a hole b opened at the bottom of an inner plug a. It has been proposed (see Japanese Utility Model Publication No. 45-14913).

Further, as shown in FIGS. 7A and 7B, the upper surface of the inner plug e holding the liquid absorbing core communicates with one or more chemical liquid containers having a diameter of 2 mm or less. There is a liquid-absorbing wick holder provided with a vent f (see Japanese Utility Model Publication No. 3-50878).

[0006] Further, there is one in which a vertical groove is engraved on the side surface of the liquid absorbing core (Japanese Patent Application Laid-Open No. 10-245086).

[0007]

However, in the case where a notch d for ventilation is provided at the bottom edge of the inner plug a formed in a concave shape, such as the inner plug a of an insecticide, the liquid absorbing core holding cylinder is used. Since the height of the liquid absorbent core is not sufficient, there are problems such as tilting, wobbling or falling off of the absorbent core (FIG. 6).

Further, in the above-mentioned conventional technique, since the inside of the chemical solution container and the atmosphere are communicated with each other through the notch d or the ventilation hole f, the chemical solution container is accidentally turned down or turned upside down even during use or not in use. Then, there is a problem that the liquid medicine leaks out from the notch d or the vent hole f and contaminates the surroundings, or the liquid medicine is consumed at an early stage.

In the case where a vertical groove is formed on the side surface of the liquid-absorbent core, the porous liquid-absorbent core is liable to lose its groove unless care is taken in its manufacture due to physical properties. There is a problem such as the groove is crushed when inserted into

The present invention has been made in order to improve the disadvantages of the prior art, and even if the pressure in the chemical container increases due to the heating of the absorbent core or a change in air pressure, the chemical container may be accidentally turned down. It is an object of the present invention to provide a liquid absorption core of a chemical vaporization container in which a chemical liquid hardly leaks even if the liquid is evaporated or inverted.

[0011]

According to a first aspect of the present invention, there is provided an absorbent core 4 held by an inner plug 3 fitted to an opening 2a of a chemical vaporization container 2. At least a part of the outer peripheral surface of the liquid absorbent core 4 is provided with a ventilation groove formed of fine irregularities vertically communicating with each other, and the depth of the ventilation groove is 3 μm to 2 μm.
It is a liquid-absorbent core of a chemical liquid evaporation container having a range of 50 μm.

[0012] In order to achieve the above object, the invention according to claim 2 is that the ventilation groove having the fine unevenness is formed by a die subjected to graining or sandblasting.

According to a third aspect of the present invention, there is provided a liquid absorbent core held in an inner stopper of a chemical vaporization container, wherein an upper end of at least a part of an outer peripheral surface of the liquid absorbent core communicates with the atmosphere. An upper ventilation groove, and a lower ventilation groove whose lower end communicates with the chemical vaporization container is provided, and a lower end side of the upper ventilation groove,
A communication groove having a minute cross-sectional area communicating the upper end side of the lower ventilation groove is formed.

In order to achieve the above object, according to the present invention, the cross-sectional area of one of the communication grooves is set to 1 × 10 ^{−6 to} 5 × 1.
0 is ^-2 those in the range of mm ^2.

[0015]

According to the above configuration, when the liquid absorbing core is heated by the heat generating means, even if the inside of the chemical liquid evaporation container is heated and the internal pressure rises, the ventilation groove formed by fine irregularities, the upper and lower ventilation grooves, and the like. Since the liquid is released to the atmosphere by the communication grooves communicating these grooves, the chemical liquid in the chemical liquid evaporation container does not leak due to the internal pressure. Further, even if the chemical liquid evaporation container is accidentally turned down or inverted, the fine ventilation groove and the communication groove prevent passage of the chemical liquid, so that leakage of the chemical liquid can be prevented.

[0016]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described in detail with reference to the drawings shown in FIGS. FIG. 1 is a cross-sectional view of a chemical vaporization device to which a chemical vaporization container is attached, FIG. 2 is a cross-sectional view of a middle plug attached to the chemical vaporization container, and FIG. It is sectional drawing.

In FIG. 1, reference numeral 1 denotes an apparatus main body, which has a container housing portion 1b having an open bottom surface in a cylindrical housing 1a having an upper portion formed in a hemispherical shape, and an upper surface of the container housing portion 1b. In addition, a screw portion 1c to which a screw portion 2b formed on the outer peripheral surface of the mouth portion 2a of the chemical liquid evaporation container 2 is screwed is formed.

In the upper part of the housing 1a, a heat is generated by heating the upper end of a liquid-absorbing wick 4 provided through the inner plug 3 fitted to the mouth 2a of the chemical liquid evaporation container 2 from the peripheral surface. Means 5, a power cord 6 for connecting the heating means 5 to a power source,
A power switch 7 for turning on and off the power supply to the heating means 5;
An LED 8 and the like for indicating the energization state of the heat generating means 5 are provided, and a concave heat receiving portion 1d is formed at the top of the housing 1, and the chemical liquid is evaporated into the air on the bottom surface of the heat receiving portion 1d. The transpiration port 1e is opened, and a plurality of fins 1f protrude around the transpiration port 1e.

On the other hand, as shown in FIG. 2, the inner plug 3 has a lid 3a fitted to the mouth 2a of the chemical vaporization container 2, and a cylindrical member penetrating vertically through the center of the lid 3a. And a porous liquid absorbent core 4 is inserted into the liquid absorbent core holding cylinder 3b.

The inner plug 3 is heat resistant to temperature and chemicals.
There is no particular limitation as long as it has chemical resistance.For example, polymer resins such as polypropylene, polyethylene, polyacetal, acrylic, nylon, polyethylene terephthalate, polycarbonate, polyphenylsulfone, polyallylsulfone, and polysulfone If necessary, a mixture of these resins with glass fiber, an inorganic substance, an antioxidant, an ultraviolet absorber, or the like can be used.

The porous liquid absorbent core 4 is generally made of clay, talc, kaolin, perlite, diatomaceous earth,
Gypsum, bentonite, glass fiber, asbestos, silica, alumina, silica-alumina, wood powder, activated carbon, cellulose, pulp, linters and other inorganic powders and / or organic powders fixedly molded with starch, carboxymethylcellulose, etc. Can be used.

Modifications of the present invention as ventilation grooves formed of fine irregularities are shown in FIGS. 4A to 4N, but are not limited to these shapes. In addition, the ventilation groove formed of fine irregularities may be provided on a part of the liquid absorbent core or may be provided on the entire surface.

A vent groove made of fine irregularities is provided on the outer peripheral surface of the liquid absorbent core. These irregularities are formed by subjecting a mold to surface treatment such as graining or sand blasting. The depth of the ventilation groove formed by the irregularities formed by graining is 3 μm to 250 μm, preferably 20 μm to
70 μm is even better.

Further, the depth of the ventilation groove formed by sandblasting and having irregularities is preferably 3 μm to 200 μm. A liquid reservoir 3d is formed on the upper surface of the lid 3a of the inner plug 3 by recessing the upper surface.
An outer fitting portion 3e fitted on the outer periphery of the mouth 2a of the drug evaporation container 2 and an inner fitting portion 3f fitted on the inner periphery of the mouth 2a are provided on the lower surface of the lid 3a so as to protrude. On the inner peripheral surface of the fitting portion 3e, for example, one annular ridge 3g is provided so as to protrude.

The liquid reservoir 3d is for temporarily storing the chemical liquid in the chemical vaporization container 2 so as not to leak to the surroundings even if the chemical liquid leaks. The liquid wick 4 is brought into contact with the liquid reservoir 3d. In this case, the chemical liquid temporarily stored in the liquid reservoir 3d can be returned to the liquid absorbent core 4 and the chemical vaporization container 2 again by the liquid absorbent core 4.

The shape of the liquid reservoir 3d may be a cylindrical shape or a mortar shape, but the shape is not limited as long as the liquid can be stored.

The annular ridge 3g protruding from the inner peripheral surface of the outer fitting portion 3e has a cross section of, for example, a semicircle, a triangle,
It has a rectangular shape or a shape obtained by chamfering them, and by strongly contacting the outer peripheral surface of the mouth 2a, liquid leakage is prevented from occurring, and the cap of the chemical liquid evaporation container 2 is closed when not in use. It is also a means to prevent liquid leakage in a state where the liquid is leaked.

Next, the operation of the absorbent core of the above-configured chemical vaporization container will be described. The chemical liquid evaporation container 2 is used by being attached to a chemical liquid evaporation device as shown in FIG. 1. When the heating means 5 is energized during use and the upper end of the liquid absorbing core 4 is heated from the peripheral surface by the heating means 5, The chemical in the chemical vaporization container 2 absorbed by the liquid absorbent core 4 is vaporized and released into the air from the vaporization port 1e.

When the liquid absorbing core 4 is heated by the heat generating means 5, the heat also heats the inside of the chemical vaporizing container 2 and the internal pressure rises. The inside of the chemical liquid evaporation container 2 does not increase in pressure because the internal pressure is released to the atmosphere by the ventilation grooves formed of fine irregularities formed on the outer surface. As a result, the chemical solution does not leak with the release of the internal pressure.

On the other hand, when the chemical liquid evaporating apparatus 1 is accidentally turned down or inverted during use or not in use, even if the chemical liquid tries to pass through the fine ventilation groove, the chemical liquid passes due to the surface tension of the chemical liquid. This makes it possible to prevent the chemical solution from leaking out and soiling the surroundings.

As the chemicals used in the present invention, conventionally used volatile insecticides, insect repellents, insect growth inhibitors, deodorants, fragrances, fungicides and the like can be used.

For example, as the insecticide, there are arrestrin, d
l-d-T80 aresulin, dl-dT-aresulin, d-d-T-aresulin, d-d-T80-praletrin, phthalthrine, dl-d-T80-phthalthrin, resmethrin, dl-d-T80-resmethrin ,
Pyrethroid compounds such as framethrin, permethrin, phenothrin, fenvalerate, cypermethrin, cyphenothrin, imiprosulin, etofenbrox, tefluthrin, fenpropatrin, fenfluthrin, empentrin, terarethrin, diazinon, D
DVP, fenitrothion, phenythion, temefos,
Organic phosphorus compounds such as phoxime, acephate, pyridafenthion, etrimphos, malathion, brothiophos, propentanphos, pyraclophos, chlorpyrifos, chlorpyrifosmethyl, penthiocarp, NAC,
And carbamate compounds such as Blopoxur.

As the insect repellent, N, N-diethyl-
m-toluamide, dimethyl phthalate, dibutyl phthalate, 2-ethyl-1,3-hexanediol, di-n
Propyl isosine comelonate, p-dichlorobenzene, di-n-butyl succinate, karan-3,4 diol, 1-methylpropyl 2- (2-hydroxyethyl) -1-piberidine carboxylate, N, N -Diethyl-m-toluamide, di-n-butylsuccinate,
Examples thereof include di-n-propylisosin comeronate, p-menthen-3,8 diol, eucarbitol, and guanidine.

Examples of the pest growth inhibitor include a kitin synthesis inhibitor such as diflubenzuron and bubrofendin, and a juvenile hormone-like substance such as biliproxyfen.

As the fragrance, for example, various natural and artificial flavors can be used, and vegetable and animal natural flavors such as rose, clove, lemon, cardamom, sandalwood, kuromoji, cinnamon, musk, civet, Examples include animal flavors such as castorium and ambergris, isolated flavors such as lemongrass and peppermint, and artificial flavors such as hydrocarbons, alcohols, phenols, aldehydes, ketones, lactones, oxides, and esters.

Examples of the deodorant include aromatic deodorants such as citral, cinnamic aldehyde, camphor and bornyl acetate; neutralizing deodorants of vegetable essential oils such as turpentine oil, eucalyptus oil and sandalwood oil; benzaldehyde ,
Chemical deodorants such as cinnamaldehyde, dimethyl maleate and fumaric acid ester; and extracts of tea leaves, green tea, mate tea, cacao, parsley, Lamiaceae and the like.

Examples of the fungicides include triclosan, parachlorometaxlenol, orthophenylphenol, isopropylmethylphenol, grapefruit seed extract, tea extract, aegin extract, hinokitiol, spinach extract, forsythia extract and the like. .

Next, the liquid absorbent core of the present invention will be specifically described with reference to test examples, but the present invention is not limited to these test examples. The outer peripheral surface of the absorbent core
A test was performed on the liquid-absorbent wick of the present invention, in which irregularities were formed by a mold surface-treated by graining.

Test Example 1 An active ingredient d was placed in a drug solution container having a 7 mm-diameter cylindrical porous absorbent core held by an inner stopper, made by bonding inorganic powder such as gypsum, clay, and diatomaceous earth with carboxymethylcellulose.
-JIS1 for d-T80-Praletrin 2.0 W / V%
45 ml of the drug solution dissolved in No. kerosene was filled and sealed with a lid to obtain a test agent. In the long-term storage test, the test agent was stored in a warehouse. And
The liquid leakage state for one year was examined. In the severe test, the test agent was stored upside down in a warehouse in summer. One month later, the state of liquid leakage was examined. The heat transpiration test was conducted by using the surface temperature of the heating element at about 130 ° C. and the number of effective transpiration days of about 30 days / day for 12 hours. As a result, in the chemical liquid evaporation container using the liquid absorbent core of the present invention, no liquid leakage was observed in any of the tests.

In this test, leakage of a commercially available aqueous chemical was also confirmed. As a result, no liquid leakage was observed, and the same effect as in the case of the oily chemical solution was obtained.

Test Example 2 Liquid leakage due to the difference in the depth of the groove of the liquid absorbent core was confirmed by the same test method as described above. As a result, when the average depth is 1 μm,
Under a long-term temperature / internal pressure change or heating use condition, the drug solution that had oozed to the outer surface of the container did not return to its original state. In the case of an average depth of 300 μm, the unevenness worked as a liquid flow path when the product was left upside down or subjected to a drop impact, and showed dripping. Average depth 3μ
m, 70 μm and 250 μm, Table 1
No leakage was observed as shown in FIG.

[0042]

[Table 1]

Test Example 3 The average depth of the above test sample was 1 μm, 70 μm, 300
The chemical liquid container using the μm absorbent core was subjected to a heat evaporation test, and was continued under the same conditions as described above until the chemical liquid disappeared. Then, the influence on the effective days at that time was examined. as a result,
The effective number of days for transpiration is as short as 20 to 24 days for a liquid absorbent core with a depth of 1 μm.
The effective days were 31 days and 28 to 31 days even for the liquid absorbent core having a depth of 300 μm.

Test Example 4 Liquid leakage due to the difference in the cross-sectional area 4d of the communication groove was confirmed by the same test method as described above. As a result, as shown in Table 2, when the average cross-sectional area was 0.5 × 10 ⁻⁶ mm ² , the drug solution that had oozed out on the outer surface of the container under long-term storage conditions and heating use conditions did not return. In the case of an average cross-sectional area of 6.5 × 10 ⁻² mm ² , it functioned as a liquid flow passage under an upside-down standing condition or a drop impact condition, and showed dripping. However, the average cross-sectional area is 1.0 × 1
0 ⁻⁶ mm ² , 1.0 × 10 ⁻⁵ mm ² , 5.0 × 1
For 0 ^-2 mm ^2, there was no leakage in any of the tests.

[0045]

[Table 2]

Test Example 5 Average cross-sectional area of the above test sample 0.5 × 10 ⁻⁶ mm
² , 1.0 × 10 ⁻⁵ mm ² , 6.5 × 10 ⁻² mm ²
Heat transpiration test with a chemical solution using the liquid absorbent core of
The procedure was continued until the drug solution ran out. Then, the influence on the effective days at that time was examined. As a result, the effective number of days of transpiration was 0.5 × 10 ⁻⁶ mm ^{2 in} cross-sectional area, and 21 to ² when the liquid absorbent core was used.
The drug solution disappeared in a short number of days, such as five days, and a liquid leak was observed.
A cross-sectional area of 1.0 × 10 ⁻⁵ mm ² , 28
Up to 31 days, almost the number of effective days, and the cross-sectional area 6.5 × 1
0 ^-2 mm ^2, exhibited almost effective number of days and between 28-32 days even when the wick used.

FIG. 4 shows a modified example of the irregularities formed on the outer peripheral surface of the liquid-absorbing core by a die surface-treated by graining.
(A) to (nu).

[0048]

According to the present invention, as described in detail above, since the ventilation groove formed on the outer surface of the liquid-absorbent core is communicated by the fine communication groove having minute unevenness and a small cross-sectional area, the liquid-absorbing liquid is generated by the heating means. When the core is heated, even if the inside of the chemical liquid evaporation container is heated and the internal pressure rises, it is released to the atmosphere by fine ventilation grooves formed by irregularities, upper and lower ventilation grooves and communication grooves communicating these grooves. Therefore, the liquid medicine in the liquid medicine evaporation container does not leak due to the internal pressure.

Even if the chemical vaporization container is accidentally turned over or inverted, the fine ventilation grooves and communication grooves prevent the chemical liquid from passing therethrough, thereby preventing the chemical liquid from leaking out. Therefore, problems such as contamination of the surroundings by the leaked chemical solution and early consumption of the chemical solution can be solved.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a chemical liquid evaporation apparatus to which a medicine evaporation container according to an embodiment of the present invention is attached.

FIG. 2 is a cross-sectional view of an inner stopper for holding a liquid-absorbing wick of the drug evaporation container according to the embodiment of the present invention.

FIG. 3 is a cross-sectional view of a drug evaporation container to which a liquid absorbing core according to an embodiment of the present invention is attached.

FIGS. 4A to 4N are enlarged views showing modified examples of irregularities formed on the outer peripheral surface of the liquid absorbing core by graining.

FIGS. 5A to 5C are explanatory views showing modified examples of the ventilation groove formed on the outer and inner peripheral surfaces of the liquid absorbent core.

FIG. 6 is an explanatory view of an inner plug for holding a liquid absorbent core in a conventional chemical vaporization container.

7 (a) and (b) are explanatory views of an inner plug for holding a liquid absorbent core of a conventional chemical vaporization container.

[Explanation of symbols]

2 ... Evaporation container for chemicals, 2a ... Mouth, 3 ... Inner plug, 3a ... Lid, 3b ... Liquid absorbent core holding cylinder, 3d ... Liquid reservoir, 3e ... Outside fitting part, 3g ... Circular ridge, 4 ... Liquid absorption core, 4a ... unevenness, 4b
... upper ventilation groove, 4c ... lower ventilation groove, 4d ... communication groove.

 ──────────────────────────────────────────────────続 き Continued on the front page F term (reference) 2B121 AA11 AA20 CA02 CA44 CA46 EA01 FA02 FA06 3E068 AA35 AA40 AB10 AC09 CC01 CC29 CD02 CE20 DD40 DE15 EE15 4C002 AA01 BB02 DD03 DD05 EE05 EE10

Claims (4)

[Claims] 1. A liquid-absorbing wick held by an inner plug (3) fitted to an opening (2a) of a chemical liquid evaporation container (2), wherein the liquid-absorbing wick has at least a part of an outer peripheral surface thereof. A liquid absorption core for a chemical liquid evaporation container, wherein a ventilation groove having irregularities is provided, and the depth of the ventilation groove is in a range of 3 μm to 250 μm. 2. The liquid absorbent core of the chemical liquid evaporation container according to claim 1, wherein the ventilation groove formed of the fine unevenness is formed by a mold subjected to graining or sandblasting. 3. An absorbent core 4 held by an inner plug 3 fitted to an opening 2a of a chemical vaporization container 2, wherein at least a part of the outer peripheral surface of the absorbent core 4 has an upper end at atmospheric pressure. And a lower ventilation groove 4c having a lower end communicating with the inside of the chemical vaporization container 2, and a minute passage communicating the lower end side of the upper ventilation groove 4b and the upper end side of the lower ventilation groove 4c. A liquid absorption core of a chemical liquid evaporation container, wherein a communication groove 4d having a large cross-sectional area is formed. 4. A sectional area of one of the communication grooves 4d is 1 ×
10^-6~ 5 × 10 ^-2mm²Claims that fall within the scope of
3. An absorbent core of the chemical liquid evaporation container according to 3.