JPH0223146B2 - - Google Patents

Description

[Detailed description of the invention]

The present invention relates to an apparatus for evaporating chemicals such as insecticides, disinfectants, indoor air fresheners, and deodorizers by heating, and more specifically, as a heating source, an alcoholic volatile fuel and a catalyst are brought into contact with each other in the air. This invention relates to a drug heating evaporation device that utilizes the heat of reaction that occurs. 2. Description of the Related Art Conventionally, devices such as electric mosquito traps have been known that heat a pine impregnated with a chemical such as an insecticide to evaporate the chemical in the pine. however,
These devices use electricity as a heat source for the heat sink that heats the pine, making the structure of the device complicated, and when using electricity, a power cord is required, which limits the places where they can be used. was. Mosquito coils, for example, have also been used to repel and kill insects during outdoor leisure activities, but they involve the problem of not being necessarily safe as they use continuous flame. Furthermore, although there are conventional platinum warmer-type liquefied gas fumigators, this fumigator uses platinum cotton, which is asbestos impregnated with platinum and palladium, and a palladium cotton catalyst, and uses a so-called platinum warmer that uses a vaporized fuel such as benzene. A heating pad was directly applied to the evaporation of insecticides, and although it was sufficient for the purpose of heat retention, it was unsuitable for use as an insecticide evaporation device that required precise temperature control. In other words, with this known method, a uniform catalyst cannot be obtained using platinum cotton, and a uniform mixture of fuel and oxygen cannot be obtained due to the uneven supply of oxygen, so a constant temperature cannot be maintained. It was hot. The present inventors first solved the above-mentioned drawbacks of these conventional heating evaporation devices and eliminated the danger of using fire by using a volatile fuel such as alcohol and platinum or palladium as a heating source. We have developed a catalyst-heating type chemical heating evaporation device that utilizes the reaction heat generated when the chemical is brought into contact with a catalyst in the air.It has a simple structure and does not require a power cord, so it can be used anywhere. That is, this device includes a fuel storage section for alcoholic vaporized fuel, etc. in the device case, a metal catalyst disposed with a certain space above the storage section, and a certain space above the metal catalyst. It houses a heat dissipation plate for heating and evaporating the drug, and
It is characterized by being equipped with a vent for supplying air and/or discharging combustion gas, and that a certain space is provided between the fuel container and the metal catalyst part to allow the mixing of fuel gas and oxygen. The effective temperature, which was previously thought to be difficult to achieve, was achieved by creating a mechanism with sufficient heat resistance and by providing a certain space between the metal catalyst part and the heat sink for chemical heating and evaporation to allow thermal convection of the combustion gas to proceed efficiently. This made it possible to maintain uniformity. Furthermore, there are two types of metal catalysts used in catalyst heating type evaporation devices: one for high temperatures and one for low temperatures.In the conventional platinum warmer type, only high temperature catalysts were used, which always required preheating with a high amount of heat. In this device, the use of alcoholic volatile fuel made it possible to use a low-temperature catalyst. However, this device is based on the premise that the exothermic reaction is started at room temperature, and has the disadvantage that it often causes heat generation failure due to inactivation of the metal catalyst. For example, the cause of this is that once the drug has evaporated, it is taken into the device together with the air and comes into contact with the catalyst member.
It is conceivable that this may become a poisonous substance upon cooling after use and adhere to the surface of the catalyst member. This poisonous substance evaporates again by heating, but this is considered to be a very troublesome problem in a transpiration device that does not have a heating means other than oxidative combustion using a catalyst. The inventors of the present invention have conducted extensive research to overcome this drawback, and have discovered that even if the low-temperature metal catalyst used in the present invention is deactivated, it can be recovered by preheating with a low amount of heat under certain conditions. Ta. Then, we developed a heating evaporation device in which a heat generating member such as a filament heater or a ceramic heater is arranged near the metal catalyst, and normal heat generation can be obtained by simply energizing the battery for a few seconds at the beginning of using the device of the present invention. Completed the invention. That is, the chemical heating evaporation device of the present invention is provided with an alcoholic volatile fuel storage section at the bottom of the case constituting the device, a certain space above the storage section, and a metal catalyst held by a catalyst holding member. A heat-generating member such as a filament heater or a ceramic heater for preheating the metal catalyst is arranged, a certain space is provided above the metal catalyst, and a heat sink for heating and evaporating the chemical is arranged, and the space above the fuel storage section is The space above the metal catalyst is partitioned by a heat insulating plate, the catalyst holding member and the heat sink are connected by a metal member, and the metal member, the upper surface of the metal catalyst held by the catalyst holding member, and the lower surface of the heat sink are connected. An enclosed space is formed in between, and the metal member is provided with a vent that communicates the enclosed space with the outside, and the spatial distance C between the upper surface of the metal catalyst and the lower surface of the heat sink is The space distance d between the lower surface of the catalyst and the upper surface of the fuel stored in the fuel storage section is 0.2 to 3.0 cm, the preheating heat generating member is relayed to the battery, and the case is connected to the case. It is characterized by being provided with a vent for air supply and/or combustion gas exhaust. The idea of using a filament energized in a battery for preheating is known, for example, in Japanese Utility Model Publication No. 49-31669, but in this case, liquefied gas such as butane gas is ignited and the combustion heat is used to activate the platinum cotton catalyst. It was used for this purpose, and required a considerable amount of heat to ignite. However, in the device of the present invention, it is surprisingly possible to promote catalyst activation with a relatively low amount of heat by covering the metal catalyst with volatile fuel gas in advance and setting the heat-generating member at a distance of 5 mm or less from the catalyst surface. However, it has become clear that the catalyst activation mechanism is completely different from the former. Examples of the heat generating member used in the present invention include platinum filament heaters and ceramic heaters, but since the purpose can be achieved with a low resistance value, it can be used in a chemical heating evaporation device without incurring cost risks. Can be loaded. Hereinafter, the present invention will be explained in more detail based on the drawings. FIG. 1 is a plan view showing an example of the drug heating evaporation device of the present invention, FIG. 2 is a sectional view taken along the line - in FIG. 1, and FIGS. FIG. 2 is a perspective view showing an example of a heat dissipation member made of a heat dissipation plate for chemical heating and evaporation, a catalyst holding member, and a metal member connecting the two. Moreover, FIG. 4 shows a rear view of the main body of the heater installed near the metal catalyst. In FIGS. 1 and 2, 1 is a bottomed rectangular case body, and 2 is a case lid, both of which constitute the case of the drug heating evaporation device.
Fuel storage section at the bottom of the case body 1 The inside of the case 1a is defined by a cylindrical inner wall 1b formed on the inside into a fuel storage section 1c and a water puddle section 1d, and 1e.
are stepped portions formed at four corners for fitting. The case lid body 2 includes a circular top plate 21 and a cylindrical side wall 27.
and the main body fitting part 28, and the space 2 inside the case.
9 is connected to the outside space of the case through a gap formed around the lower side wall 27a. A rectangular opening 22 is arranged approximately in the center of the top plate 21, and the opening end 22a on the front side has a rectangular shape similar to and slightly larger than the insecticidal mat 3 set in the chemical heating evaporation device. There is. Immediately below the chemical heating and transpiration heat dissipation plate (hereinafter simply referred to as a heat dissipation plate) 4 on which the insecticidal mat 3 is placed, an insulating rubber packing 23 is placed along the inner periphery of the opening to weaken the heat conduction to the case and to prevent the insecticidal mat from spreading. This prevents components from entering the catalyst through the gaps in the openings 22. Also, a part 21a of the top plate placed below the opening
supports a metal member connected to the heat dissipation plate 4 and a catalyst holding section to be described later. Reference numerals 24 and 24 denote recesses that are provided adjacent to a pair of long sides of the opening 22 on the surface of the top plate 21 and are smoothly inclined from the peripheral end toward the center. The recesses 24, 24 are formed for ease of attaching and removing the insecticidal mat when the insecticidal mat is inserted into the opening 22, placed on the heat sink 4, or taken out. 26, 26, 26, 26 are screws for fixing the case lid body 2 to the case body, and also an insulating partition plate that partitions the space above the fuel storage section and the heat sink storage space above the metal catalyst. It also plays the role of supporting 7. 3 is an insecticidal mat, which is a rectangular fiberboard impregnated with an insecticidal active ingredient chemical solution. However, the shape is not particularly limited as long as it can be inserted into the opening 22 of the case 2. FIG. 3 is an enlarged perspective view of a heat dissipation member made of a heat dissipation plate, a catalyst holding member, and a metal member connecting the two. The heat dissipation member in Figure A is of the type incorporated in Figures 1 and 2, and includes an upper plate (heat dissipation plate) 41 on which the insecticidal pine is placed and heats it, and a lower part extending downward from the top plate (heat dissipation plate) 41 on which the insecticidal pine is placed and heated. It is composed of a cylindrical metal member 42 having a metal catalyst holding member 43 at the top. The metal member 42 is threaded and fixed to the heat sink mounting case via a washer and a nut 44, and a catalyst 5, which will be described later, is fitted into the catalyst holding member 43 and held by a ring 45. It's learned not to fall. Ventilation holes 46, 46, . If the top plate 41 is also made porous and a part of the combustion gas generated from the monolith catalyst 5 is allowed to escape through the holes in the top plate 41, the oxidation reaction of the fuel in the monolith catalyst 5 is promoted, and the heat of the combustion gas is This is preferable since convection is not inhibited, but it is not necessarily necessary to use a perforated plate. Another modification of the heat dissipation member is shown in FIG. 3B. The heat dissipation member includes a top plate (heat dissipation plate) 41 on which the insecticidal pine is placed and heated, and side plates 52, 52 extending downward from both ends of the top plate 41 while being slightly inclined toward the center. , lower plates 53, 53 that are parallel to the upper plate 41 and extend toward the center from the lower ends of the side plates 52, 52; Legs 542, 542, 542,
542. One leg 542 has an elongated L-shaped cross section side wall 5.
42a and a horizontal bottom portion 542b for supporting the catalyst that protrudes inward at the lower end of the side wall 542a. The legs 542, 542, 542, 542 form a catalyst holding member 54. The heat dissipation member of this modification is integrally formed using a metal plate with excellent thermal conductivity, and the catalyst holding member 5
4 is four elongated legs 542, 542, 542,
542, from the catalyst 5 to the top plate 41.
This has the advantage that the weight of the heat dissipation member itself can be reduced without hindering heat conduction to the heat dissipation member. The side plates 52, 52 each have a ventilation hole 52.
a, 52a... are bored, and these ventilation holes 52a,
52a, the combustion gas mainly from the catalyst 5 can be discharged to the outside. A space C having a certain height is formed between the upper surface plate 41 and the upper surface of the metal catalyst 5, so that the catalyst 5 and the upper surface plate 41 do not come into direct contact with each other. The distance of the space C, that is, the interval between the upper surface of the catalyst and the lower surface of the upper plate (lower surface of the heat sink for chemical heating and evaporation) (shown as Ccm in FIG. 2) is 0.2 to 3.0 cm. The catalyst and the top plate are in contact (C = 0cm) or are too close even if they are separated (C < 0.2cm)
During this time, thermal convection and oxidation reaction of the combustion gas are hindered, resulting in insufficient heating of the top plate. By keeping the catalyst and top plate at least 0.2 cm apart,
The top plate is most efficiently heated to a high temperature by thermal convection of the combustion gas emitted from the catalyst. The monolithic catalyst 5 has a prismatic or cylindrical shape that can be housed in a catalyst holding member, and is made by supporting a catalytically active metal such as platinum or palladium on a honeycomb structure ceramic carrier. The catalyst 5 used in the present invention is of course not limited to this, and may be bead-shaped or wool-shaped, for example. Reference numeral 7 denotes a partition plate that partitions the space above the fuel storage section and the heat sink storage space above the metal catalyst, and has a circular shape with a diameter that allows it to be placed on the upper surface 1f of the hollow main body case. The insulating support plate 7 is non-breathable or slightly breathable as the case may be, and is preferably made of a heat-resistant material, such as glass fiber.
For example, after placing a metal plate 8 having an appropriate hollow portion thereon, it can be fixed with screws 26, 26, 26, 26. Also, 1g is a cylindrical inner wall provided around the metal catalyst, which is effective in efficiently passing the mixed gas of fuel and air over the catalyst. 1h is a vent hole through which air necessary for the catalytic oxidation reaction of fuel is supplied. Although the purpose can be achieved by placing the vent hole either on the side or the top of the case, it is preferable to place it as low as possible or on the bottom of the fuel storage case. It is also possible to use one vent for both air supply and combustion gas exhaust; in this case, for example, the gap between the insecticidal pine and the opening is used as the vent, and no other vent is required. FIG. 4 shows a rear view of the main body of the apparatus of the present invention in which a preheating heater is loaded. Heater 9 held by heater holding member 10
is installed within 5 mm from the bottom surface of the metal catalyst, and is connected to the push button switch 13 and the battery box 12.
Power is relayed to the dry battery 11 inside. Reference numeral 15 denotes a fuel filling container placed in the fuel storage part 1b, which has an open top surface, is filled with volatile fuel, and is stored in the fuel storage part 1b of the fuel storage case 1a. A space D having a certain height is secured between the fuel filling container 15 and the catalyst 5. The fuel used in the chemical heating evaporation apparatus shown in FIGS. 1 to 4 is a volatile fuel that causes an exothermic reaction with the catalyst, specifically alcohol, preferably methanol or ethanol. be. Alcohols can be in liquid form, or in gel form using carboxyvinyl polymers, copolymers of maleic anhydride and isobutylene, copolymers of vinyl alcohol and acrylic acid, starch derivatives, or alcohols. Any solid fuel containing as a main component can be used. Also, when using gel fuel or solid fuel,
Spray the fuel with gauze, coarse cloth such as non-woven fabric, foam, etc.
Covering the container with a porous material such as ceramics or plastic that does not hinder the evaporation of the fuel is useful for preventing the fuel from flowing out of the container or for adjusting the amount of vaporized fuel gas. In the chemical heating evaporation device having the above configuration, the insecticidal mat 3 is put into the opening 22 of the case 2 and placed on the heat sink 4. After installing the fuel, press the push button switch for a few seconds to preheat the catalyst. After the alcohol fuel volatilized from the fuel filling container 15 fills the space D, the alcohol fuel volatilized from the fuel filling container 15 fills the space D.
It passes through a catalyst 5 disposed above. In the catalyst 5, the fuel alcohol is oxidized by reacting with platinum, palladium, etc., and then is discharged from the catalyst 5 as a combustion gas. After this combustion gas further rises and fills the space C, it passes through ventilation holes 46, 46, . . . formed in the side surface of the metal member 42, and is exhausted to the outside. The reaction heat generated by the oxidation of the alcohol fuel in the catalyst 5 is convectively transferred to the heat sink 4 located above the catalyst 5, increasing the temperature of the heating plate 4. Further, the reaction heat in the catalyst 5 is conducted to the heat sink 4 through the metal member, thereby uniformly increasing the temperature of the heat sink 4. The insecticidal mat 3 placed on the heat radiating plate 4 whose temperature has increased is thereby uniformly heated, and the insecticidal active ingredient in the insecticidal mat 3 evaporates outward from the opening 22 of the case lid 2. During this time, the air necessary for the alcohol fuel oxidation reaction in the catalyst 5 is supplied to the main body case vent 1.
h and is supplied to the catalyst 5. A part of the air necessary for the oxidation reaction in the catalyst 5 is transferred to the gap 4.
6, 46... and is supplied to the catalyst 5. Moisture generated by the oxidation reaction of the fuel is stored in a puddle portion 1d of the case body 1. Insecticides that can be used in the device of the present invention include:
All insecticides that have been conventionally used as insecticides for electric mosquito traps can be used, specifically the following: As an insecticidal ingredient, 3-allyl-2-
Methylcyclopent-2-en-4-one-1-
yl dl-cis/trans-chrysanthemate (allethrin), 3-allyl-2-methylcyclopent-2-en-4-one-1-yl d-cis/
trans-chrysanthemate, d-3-allyl-
2-Methylcyclopent-2-en-4-one-
1-yl d-trans-chrysanthemate, 5
-propargyl-2-furylmethyl d-cis/
trans-chrysanthemate, 1-ethynyl-2
-Methylpent-2-en-1-yl d-cis/trans-chrysanthemate, 1-ethynyl-2-methylpent-2-en-1-yl 2,
Pyrethroid insecticides such as 2,3,3-tetramethylcyclopropanecarboxylate can be used, as well as piperonyl butoxide, N-(2-
ethylhexyl)-1-isopropyl-4-methylbicyclo[2,2,2]-oct-5-ene-
Pyrethroid synergists such as 2,3-dicarboximide and octachlorodipropyl ether can be blended. These insecticidal ingredients are used by impregnating a mat made of fiberboard. In addition to the above ingredients, BHT, BHA′,
It can also be prepared by blending antioxidants such as DBH, dyes whose color fades with use to tell whether or not they have been used, and even fragrances. In addition to the drug-impregnated mat, the device of the present invention can also be used, for example, in an aluminum container filled with a heat-evaporable solid drug. Furthermore, in addition to insecticides, disinfectants, indoor air fresheners, deodorizers, and the like can be used in the same manner. As examples of disinfectants that can be used, any disinfectant that has volatile properties such as alcohols or dioxins can be used. The drug heating evaporation device of the present invention is shown in FIGS. 1 to 4.
It is not limited to the structure shown in the figure. At the open end 22a of the top plate, the heat sink 4 is in close contact with the case via the insulating rubber packing 23, but a ventilation gap is provided that communicates from the open end 22a to the case internal space 29 to prevent volatilization of chemicals or combustion gas. It is also possible to have a structure that promotes heat convection more efficiently. The distance of space C, that is, the distance between the top surface of the catalyst and the bottom surface of the heat sink (shown as ccm in Figure 2), is 0.2
~3.0cm. If the catalyst and heat sink are in contact (c = 0 cm) or are separated but are too close together (c < 0.2 cm), thermal convection and oxidation reaction of the combustion gas between them will be hindered, causing the heat sink to Heating becomes insufficient. The distance between the top surface of the catalyst and the bottom surface of the heat sink
By setting the thickness to 0.2 to 3.0 cm, the heat sink can be heated to a high temperature most efficiently by thermal convection of combustion gas coming out of the catalyst. The fuel filling container may be of any type as long as it has an open top and allows the fuel to evaporate efficiently from the filled container. The distance of the space D between the upper surface of the fuel and the lower surface of the catalyst, that is, the distance d is 0.3 to 10.0 cm. Whether the fuel and catalyst are in contact (d=0cm) or
If it is less than 0.3 cm, the volatilized fuel will not efficiently flow into the catalyst, resulting in fuel loss, which is undesirable. By setting the distance between the two members to 0.3 to 10.0 cm, volatile fuel can smoothly pass through the catalyst and cause an oxidation reaction. In addition, Figures 1 to 4
Although the battery box is loaded outside the case, it can of course also be installed inside the case. Next, the apparatus of the present invention will be explained using examples. Example 1 5-propargyl-2-furylmethyl d-cis/trans-chrysanthemate 5g, N-(2-
ethylhexyl)-1-isopropyl-4-methylbicyclo[2,2,2]oct-5-ene-
15 g of 2,3-dicarboximide, 1.5 g of DBH and 1,4-diisopropylaminoanthraquinone
0.2 g was dissolved in acetone to make 100 ml, and 1 ml of this solution was impregnated into a 35 x 22 x 2.8 mm fiberboard and air-dried to remove the acetone to obtain insecticidal pine. This is used by placing it on the heat radiating plate of the chemical heating and evaporation device shown in FIGS. 1 and 2. Example 2 3-allyl-2-methylcyclopent-2-en-4-one-1-yl d-cis/trans-
Chrysanthemate 6g, piperonyl butoxide
Add acetone to 4g of BHT, 2g of BHT, and 0.3g of 1,4-dimethylaminoanthraquinone and dissolve to make 100ml. The same fiberboard as in Example 1 was impregnated with 1 ml of this solution to obtain insecticidal pine. This is used by placing it on the heat radiating plate of the chemical heating and evaporation device shown in FIGS. 1 and 2. Example 3 1-ethynyl-2-methylpent-2-ene-
1-yl d-cis/trans-chrysanthemate 10 g, N-(2-ethylhexyl)-1-isopropyl-4-methylbicyclo[2,2,2]oct-5-ene-2,3-dicarboximide 8g,
1 g of DBH, 0.8 g of perfume, 0.2 g of 1,4-diisopropylaminoanthraquinone, and 10 g of odorless kerosene were mixed, heated and dissolved, and 0.3 g of the solution was impregnated into the same fiberboard as in Example 1 to obtain insecticidal pine. This mat was placed on the heat sink of the chemical heating evaporation device shown in Figures 1 and 2, and a test using Culex pipiens showed that it was as effective as a commercially available mosquito coil for up to 10 hours. Example 4 2 ml of an ethanol solution of 1 g of dioxin was mixed with 30×
A 20 x 3 mm ceramic plate was impregnated, and this was
It is placed on the heat radiating plate of the chemical heating evaporation device shown in Fig. 2 and Fig. 2, and used for indoor sterilization. A comparison of the number of sterilizations in the room before and after use was carried out using the Shearle method using an agar medium, and the number of sterilizations after use was less than 1% compared to before use. Example 5 Carboxyvinyl polymer (trade name Hibis Wacol 104) was added to 47 g of ethanol solution containing 5 g of fragrance.
After adding and dissolving 1 g, 2 g of 2% triethanolamine aqueous solution was added to prepare a gel. 20 g of this gel was placed in an aluminum container, placed on the heat sink of the chemical heating evaporation device shown in FIGS. 1 and 2, and used as an indoor fragrance deodorizer. Example 6 The fiberboard of Example 1 was impregnated with 1 ml of an alcohol solution containing 0.5 g of an alcoholic extract of the deodorizing component in fresh leaves of Camelliaaceae plants (trade name Deodora-S), and this was shown in Figures 1 and 2. A deodorization test was carried out in a toilet by placing it on the heat sink of the chemical heating evaporation device shown. As a result, it was possible to completely eliminate the bad odor. Next, the present invention will be explained using test examples. Test Example 1 The insecticidal pine obtained in Examples 1 and 2 was placed on the heat sink shown in Figures 1 and 2, and the fuel container was filled with 90 parts of methanol, 8 parts of ethanol, and benzylidene of D-sorbitol. 25 g of a gel prepared from 2 parts of a derivative (trade name: GELOL D) was added, and a test was conducted on Culex pipiens over time. The results are shown in Figure 5. "Relative potency" in the figure assumes that the potency after 1 hour has passed is 1.0, and thereafter the potency at each time was tested as a relative ratio. As is clear from FIG. 5, the insecticidal pine of Examples 1 and 2 both exhibit good effects. Test Example 2 In the chemical heating evaporation device shown in FIGS. 1 and 2, the distance (ccm) between the catalyst 5 and the heat sink 4 and the distance between the catalyst 5 and the fuel filling container 15 filled to the top of the opening. The temperature of the heat sink 4 was measured while varying the distance (dcm) between the two, including the presence or absence of a vent. The results are shown in Table 1. In this test example, 6 parts of stearic acid was heated and dissolved in 86 parts of methanol as a fuel, and 8 parts of 12.5% sodium hydroxide solution (water: methanol = 1:8) was added to this.
The measurement chamber was kept at a room temperature of 25°C ± 1°C.

[Table] Average value of temperature at each time The following is clear from the results in Table 1 above. Comparing No. 1 and No. 2 to 10, it is necessary to keep a distance between the fuel filling container (fuel) 15 and the catalyst 5, and the temperature of the heat sink 4 can be controlled by this distance. . In addition, the distance between the catalyst 5 and the heat sink 4 is also considered to be necessary from the comparison between No. 5 and No. 11, and the magnitude of that distance (ccm) is
and No. 11 to No. 17 affect only the temperature of the heat sink 4. Therefore, by appropriately combining the distances ccm and dcm, the temperature of the heat sink 4 can be selected depending on the type of medicine and purpose. Next, the vent is No.
From the results of No. 4 and No. 18, it can be seen that it is essential. In addition to this, the size of the ventilation hole,
According to tests regarding the number of vent holes, the temperature of the heat sink does not rise at all if there is a vent, and if the size of the vent is constant, a constant temperature can be obtained on the heat sink. Further, although the vent hole is preferably located below the side surface of the main body case or at the bottom of the fuel storage case, similar results were obtained even when the vent hole is provided above the side surface of the main body case. The size of the opening on the top surface of the fuel filling container varies depending on the type of fuel used and the distance between the fuel filling container and the catalyst, but under constant conditions, a stable temperature was obtained on the heat sink. From the above test examples, in order to efficiently heat the heat sink using a constant heat source in the chemical heating transpiration device of the present invention, it is necessary to maintain a certain space between the fuel filling container and the catalyst and between the catalyst and the heat sink. It is necessary to provide a
It is clear that it can be changed as appropriate depending on the purpose of use, medicine, type of fuel, etc. Test Example 3 The temperature of various volatile fuels was measured using the chemical heating evaporation device of the present invention shown in FIGS. 1 and 2. The temperature of the measurement room was 25℃±1℃.

[Table] Average temperature for each hour
From the above Test Example 3, the desired temperature was obtained for any volatile fuel used in the chemical heating evaporation device of the present invention as long as it was an alcoholic fuel that was volatile at room temperature, and no major difference was observed. Test Example 4 The following tests were conducted on the drug heating evaporation device of the present invention shown in FIGS. 1 and 2, which used a 1.3Ω platinum filament and 1.5×2 dry batteries as a preheating heater. That is, without preheating, when a heater was loaded into a device that failed to generate heat, the type of fuel and the distance between the metal catalyst and the filament heater were changed, and the temperature was measured after the elapse of time, the following results were obtained. The temperature of the measurement chamber was 25°C±1°C, and electricity was applied for 5 seconds.

[Table] Temperature average value over time
From the above tests, it was found that the chemical heating evaporation device of the present invention was effective against volatile alcohol fuels, but was not applicable to liquefied gas used as fuel in platinum cotton type devices. This indicates that the catalyst activation mechanism is different for both gases. In addition, the distance between the catalyst and the filament must be 5 mm or less; if it is too large, the recovery of heat generation will be delayed.

[Brief explanation of drawings]

Fig. 1 is a plan view showing an example of the drug heating evaporation device of the present invention, Fig. 2 is a sectional view taken along the line - - of Fig. 1, and Fig. 3 A and B are perspective views showing an example of the heat dissipation member of the present invention. 4 is a back view of FIG. 1, and FIG. 5 is a diagram showing the results of Test Example 1. 1...Case body, 1c...Fuel storage section, 2...
... Case body, 3 ... Insecticidal mat, 4 ... Heat sink for chemical heating and evaporation, 42 ... Metal member, 5 ... Metal catalyst, 43 ... Catalyst holding part, 9 ... Heater.

Claims (1)

[Claims] 1. An alcoholic volatile fuel storage section is provided at the bottom of the case constituting the chemical heating evaporation device, and a certain space is provided above the storage section to preheat the metal catalyst held by the catalyst holding member and the metal catalyst. A heat-generating member such as a filament heater or a ceramic heater is placed, and a heat sink for heating and evaporating the chemical is placed with a certain space above the metal catalyst to separate the space above the fuel storage section from the space above the metal catalyst. partitioned by a heat insulating plate, connecting the catalyst holding member and the heat sink with a metal member, and defining a space surrounded between the metal member, the upper surface of the metal catalyst held by the catalyst holding member, and the lower surface of the heat sink. The metal member is provided with a ventilation hole that communicates the enclosed space with the outside, and the spatial distance C between the upper surface of the metal catalyst and the lower surface of the heat sink is
0.2 to 3.0 cm, and the spatial distance d between the lower surface of the catalyst and the upper surface of the fuel stored in the fuel storage section is 0.3 to 10 cm.
A chemical heating and evaporating device characterized in that the heat generating member for preheating is electrically relayed to a battery, and the case is provided with a vent for supplying air and/or discharging combustion gas.