JP2600743Y2 - Heat evaporation unit - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a heat evaporation device for heating and evaporating chemicals such as insecticides and repellents.

[0002]

2. Description of the Related Art Conventionally, as a method of heating and evaporating a medicine for the purpose of insecticide or the like, there are two methods: (1) so-called mosquito coil and (2).
Electric mosquito collection mats have been favored. In recent years, the method of immersing a porous absorbent core in a drug solution and heating the core to heat and evaporate the drug has been paid attention again because it is not necessary to change each time and the effect is stable for a long time. It has been.
This method has been known for a long time, and for example, Japanese Utility Model Publication No. 43-25081 describes a method using direct heating. Method tends to be adopted. As a method by indirect heating, a method of heating with a felt or the like interposed between a liquid absorbent core and a heating element is described in Japanese Utility Model Publication No. Sho 36-12459 and Japanese Utility Model Publication No. Sho 46-22585. The method of heating the heating element while keeping it apart from the heating element at regular intervals is described in Japanese Utility Model Publication No. 43-26274, Japanese Utility Model Publication No. 44-8361, Japanese Utility Model No. 45-14913, and Japanese Utility Model Publication No. 45-29244. I have.

[0003] Recently, improvement of the material and composition of the liquid absorbent core has been described in, for example, Japanese Patent Publication No. 59-40409 and Japanese Patent Publication No.
Various proposals have been made, such as JP-A-23163. on the other hand,
The evaporation efficiency of the chemical is closely related to the structure of the heating evaporation apparatus.
No. 8 discloses a heating and evaporating apparatus in which a vent is provided in a body trunk, and has not been sufficiently studied at present.

[0004]

[Problems to be Solved by the Invention] The present invention improves the functionality of a conventional heating and evaporating apparatus, enables efficient evaporation using little loss of calorific value and chemical solution, has excellent diffusing power, and is safe to use. The purpose of the present invention is to provide a device of this type.

[0005]

Means for Solving the Problems In order to achieve the above object, the present inventor has studied the usability, volatilization efficiency, drug volatilization pattern, etc. of this type of heating and evaporation apparatus from all angles, and as a result, the liquid absorbing core By providing a cylindrical ring having a diameter of 10 to 30 m / m serving as a chimney-shaped evaporating cylinder above the heating element of the heating and evaporating apparatus provided with a heating element with a gap provided around the heat receiving portion, thereby dissipating heat radiation energy. Efficiently without loss, that is, it is possible to save power consumption, and it is possible to efficiently volatilize through the cylindrical ring without losing the chemical solution, and to insert foreign matter such as wire from the outside from the diffusion port. When they did, they found that they were extremely effective in preventing electric shock by preventing their arrival at the electrical wiring with a cylindrical ring.

Therefore, the heating and evaporating apparatus of the present invention is a vessel having a liquid medicine container provided with a liquid absorbing core, at least a heat receiving portion of the liquid absorbing core, and a heating element provided with a gap around the heat receiving portion. In a heating and evaporating apparatus comprising a body and a protective cap having a diffusion port in a central portion provided on an upper part of the vessel, a uniform inner diameter in a range of 10 to 30 mm and 0.5 to 3 mm A cylindrical ring having a thickness of is provided, a circumferential portion of an upper end opening of the cylindrical ring is integrally formed with an inner surface of the protective cap, and an upper end opening of the ring opens at the diffusion port. And the lower end opening of the ring is open facing the gap. Furthermore, in the present invention,
If a vent is provided at the bottom or side surface of the container, and the outside air communicates with the gap around the heat receiving portion of the liquid absorbent core through the vent, the device itself has the function and effect of a chimney. It became clear that the volatilization efficiency at the time of use can be further increased.

That is, according to the present invention, in a heating and evaporating apparatus in which a liquid medicine container having a liquid absorbing core is housed, and a gap is provided around a heat receiving portion of the liquid absorbing core and a heating element is provided, a specific evaporating cylinder is provided. The present invention relates to a heating and evaporating apparatus capable of saving power consumption and efficiently evaporating a chemical solution by providing a cylindrical ring having a size of. More preferably, the present invention provides a heating and evaporating apparatus capable of further increasing the volatilization efficiency by providing a vent at the bottom or side surface of the heating and evaporating apparatus.

[0008]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
FIG. 2 is a cross-sectional view of the heating and evaporating apparatus according to one embodiment of the present invention, FIG.
Is a sectional view of another embodiment, and FIG. 3 is a sectional view of still another embodiment.

The heating and evaporating apparatus according to the present invention comprises a main body 1 and a chemical liquid container 2 as main parts. The main body 1 has a heating element 3, a power cord 4 connected to the heating element 3, a protective cap 5, an on / off operation switch. A chemical solution container 2 containing a chemical solution 7 is provided with a liquid absorbing core 8. The body 1 is molded using a semi-rigid or rigid flame-retardant plastic, but may be divided into appropriate parts and assembled to form a required one. In addition, a liquid amount confirmation window may be provided by partially using a transparent resin or by perforating so that the liquid amount in the chemical liquid container 2 can be confirmed from outside the apparatus. Chemical solution container 2 is polypropylene,
It is made of plastic having excellent chemical resistance, such as PET or ABS. A chemical solution 7 is injected, and the liquid absorbent core 8 is held in a tightly closed state via an appropriate holding member.

As a storage method, as shown in FIGS. 1 and 2, there is a method of screwing into a holding body 10 provided on the chemical solution container 2, and the chemical solution container 2 is firmly fixed to the container 1. Further, since the gap 11 between the heat receiving portion of the liquid absorbing core 8 and the heating element 3 can be kept uniform around the periphery, the liquid absorbing core 8
However, there is no fear that the drug may be decomposed by touching the heating element 3. On the other hand, as shown in FIG. 3, a screw-type bottom cover 9 may be provided on the bottom surface, and the drug solution container 2 may be placed thereon. However, the former is preferable in terms of the storage state or the stability of the drug evaporation function. .

The former method without the bottom lid 9 has the advantage that the number of parts is smaller and the cost is lower. In addition, for example, in the apparatus shown in FIG. There is also the advantage that the amount of residual liquid can be determined at a glance by making the structure exposed. In FIG. 1 as well, the amount of liquid in the chemical solution container 2 can be checked simply by lifting the apparatus, and the apparatus in FIG. 3 can also easily check the amount of liquid by making the bottom cover 9 transparent.

The heating element 3 is provided at the center of the top surface of the container 1 so as to surround the upper end of the liquid absorption core 8 with a gap 11 therebetween. It is fixed in place by applying means such as mooring.

Reference numeral 4 denotes a power cord connected to the heating element 3. The power cord may be an extension cord mounting type, a so-called cordless type in which a plug terminal is fixed to the housing 1, or a power cord may be accommodated. It is possible to provide a separate storage room in the container 1. Reference numeral 5 denotes a protective cap mounted on the upper portion of the heating element 3, which must be provided for safety. A diffusion port 12 is formed at the center thereof, and its size and shape are arbitrary as long as the evaporated chemical liquid does not excessively condense and adhere to the protective cap 5 or the container 1. Reference numeral 6 denotes a switch for turning the heating element 3 on and off, and the switch may include a light source that emits light during the on operation.

As the chemical solution 7 used in the present invention, a pesticide, a repellent and the like are used. A solvent having a high flash point, no odor, and toxicologically safe, for example, a normal paraffin, an isoparaffin or a naphthene having 12 or more carbon atoms. Those dissolved in hydrocarbons are preferred. In addition, as insecticides,
Various volatile volatile insecticides conventionally used can be used, and examples thereof include pyrethroid insecticides, carbamate insecticides, and organic phosphorus insecticides. In general, pyrethroid insecticides are preferably used because of their high safety, and examples thereof include the following insecticides, but are not limited thereto. a) 3-allyl-2-methylcyclopenta-2-en-4-one-1-yl d-cis / trans-chrysanthemate (trade name; pinamine forte: manufactured by Sumitomo Chemical Co., Ltd.) b) ( S) -2-Methyl-4-oxo-3- (2-propynyl) cyclopenta-2-enyl d-cis / trans-chrysanthemate (generic name: praletrin) c) 5-propargyl-2-furylmethyl d- Cis / trans-chrysanthemate (trade name: Pinamine D Forte: manufactured by Sumitomo Chemical Co., Ltd.) d) 1-ethynyl-2-methyl-2-pentenyl d
-Cis / trans-chrysanthemate (generic name; empentrin)

The liquid absorbent core 8 is made of an inorganic substance such as calcium carbonate, magnesia, clay, talc, kaolin, diatomaceous earth, masonry, porcelain, heat-resistant polymer substance, wood powder, pulp, charcoal powder, Organic powders such as activated carbon can be used for starch, dextrin, methylcellulose, CMC, PVA
It can be obtained by hardening with a glue such as, for example, and is held tightly in the chemical solution container 2 via an appropriate holding member.

In this embodiment, in addition to the above configuration, a diameter of 10 to 3 is provided between the heating element 3 and the diffusion port 12 of the heating and evaporating apparatus.
0 m / m, cylindrical ring 16 having a thickness of 0.5 to 3 m / m
And the circumference of the upper end opening of the cylindrical ring
The top and is bound by integral molding, the upper end opening of the ring is opened at the upper surface of the instrument, and by the lower end opening of the ring is opened by facing the gap, without loss of heat radiation energy and chemical It is characterized in that the gas is efficiently vaporized through the cylindrical ring 16. The gap between the heating element and the cylindrical ring 16 is
It is necessary to provide a gap that has no problem with heat resistance,
The shape of the cylindrical ring 16 is arbitrary as long as it conforms to the gist of the present invention.

In order to further increase the volatilization efficiency, a vent 14 is provided at the bottom or side of the heating and evaporating apparatus, and the outside air flows from the vent 14 through the gap between the heat receiving portion of the liquid absorbing core 8 and the heating element 3 to the inside. You may make it communicate. The bottom vent 14 can be replaced by a gap 14 formed by providing the leg 15 on the body 1 as shown in FIG. 1, or the vent 14 can be provided on the side surface as shown in FIG. Alternatively, it may be formed on the bottom cover 9 as shown in FIG.

When the thus obtained heating and evaporating apparatus of the present invention is used with electricity, the chemical which has permeated the heat receiving portion of the liquid absorbing core 8 is indirectly heated by the heating element 3 and volatilized. Further, the air in contact with the heating element 3 in the apparatus flows upward as a result of an increase in temperature. Furthermore, when the vent 14 is provided at the bottom or side of the device, cool air flows in and the device exhibits a chimney-type operation effect. Test examples are shown below to clarify the effects of the present invention.

Test Example 1 Calcium carbonate, wood flour, and starch are kneaded in a plastic bottle containing 1.8 g of Pinamine D forte (trade name; manufactured by Sumitomo Chemical Co., Ltd.) and 35 g of BHT dissolved in normal paraffin as an insecticide. The obtained liquid absorption wick with a diameter of about 7 mm and a length of about 70 mm is held in a sealed stopper shape,
After being housed in various heating and evaporating devices, it was used with electricity. The following items were tested and compared, as shown in the table. (I) Evaporation efficiency: The volatilized drug solution was trapped by a column packed with silica gel and analyzed by gas chromatography to determine the amount of volatilized pinamine D-forte, and the effective volatilization rate with respect to the amount of chemical solution weight loss was calculated. (II) Diffusivity: A test device was installed in the center of a room of 6 mats (2.5 m height) that released 100 adults of Culex pipiens,
The knockdown insect rate after exposure for 20 minutes after the start of energization was observed. (III) Prevention of contamination of the equipment ...
Alternatively, dirt attached to the protective cap 5 was observed. The evaluation criteria are as follows. I; ：: Effective volatilization rate is 97% or more △: 〃 90 to 97% ×: 〃 90% or less II; ：: Knockdown rate is 60% or more ：: ３０ 30 to 60% ×: ３０ 30% or less III; ：: Almost no dirt. Δ: 〃 Slightly recognized. ×: 〃 Appreciable.

When a wire having a diameter of 0.5 m / m was inserted from the diffusion ports of the various heating and evaporating apparatuses used in Test Example 1, a test was performed to determine whether or not the tip of the wire reached the internal wiring. Although this test was performed without applying a voltage, it is considered that when a voltage is applied, an electric shock is naturally caused by the arrival of the wire. ○: Wire does not reach electrical wiring ×: Wire reaches electrical wiring

<Test Results> In the device of the present invention in which the cylindrical ring 16 is provided and the vent hole 14 is provided on the bottom or the side surface, stable vaporization performance and high drug diffusing power are exhibited, and satisfactory insecticide is obtained even in a large room. Although the efficiency was obtained, the types shown in FIGS. 1 and 2 in which the gap 11 between the liquid absorbing core 8 and the heating element 3 can be uniformly fixed around the periphery were more preferable. Further, the device according to the present invention is excellent in terms of prevention of contamination and safety of the device. On the other hand, with the conventional commercially available devices, satisfactory results were not obtained in terms of transpiration performance, drug diffusing power, safety and the like.

[0022]

According to the present invention, compared with the conventional heating and evaporating apparatus, the heat dissipation and the loss of the chemical solution can be reduced, the evaporating can be used efficiently, the diffusing power is excellent, and the use is safe.

[Brief description of the drawings]

FIG. 1 is a sectional view of a heating and evaporating apparatus according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view of a heating and evaporating apparatus according to another embodiment of the present invention.

FIG. 3 is a sectional view of a heating and evaporating apparatus according to another embodiment of the present invention;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Container body 2 ... Chemical liquid container 3 ... Heating element 4 ... Power cord 5 ... Protective cap 6 ... Switch 7 ... Chemical liquid 8 ... Liquid absorption core 9 ... Bottom lid 10 ... Holder 11 ... Gap 12 ... Diffusion port 13 ... Strut 14 ... Vent (gap) 15 ... Leg 16 ... Cylindrical ring

Claims (2)

(57) [Scope of request for utility model registration] 1. A chemical container having a liquid absorbing core, a container housing at least a heat receiving portion of the liquid absorbing core, and having a heating element provided with a gap around the heat receiving portion, and an upper portion of the container. In a heating and evaporating apparatus comprising a protective cap having a diffusion port in a central portion provided, a cylindrical ring having a uniform inner diameter in a range of 10 to 30 mm and a thickness of 0.5 to 3 mm is provided on an upper portion of the heating element. A circumferential portion of an upper end opening of the cylindrical ring is formed integrally with the inner surface of the protective cap, an upper end opening of the ring is opened at the diffusion port, and a lower end opening of the ring is provided. Is a heating and evaporating apparatus characterized by having an opening facing the gap. 2. A vent is provided on the bottom or side of the vessel,
2. The heat evaporation device according to claim 1, wherein the outside air is communicated with the gap around the heat receiving portion of the liquid absorbent core through the vent.