JPS6352854B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a pest exterminator that uses ceramic supporting an oxidation catalyst as a heat source to gasify a solid insecticide to achieve the purpose of exterminating pests.

Vape (trade name), which is conventionally known as this type of pest control device, uses a household power source as a heat source to gasify the solid insecticide, and lacks mobility. Also, as a heat source, it is known to use ceramics supporting an oxidation catalyst that generates heat through an oxidation reaction with an organic volatile agent, but it cannot be said that sufficient contact with the organic volatile agent and air is achieved, resulting in poor heat generation efficiency. It has problems such as inferiority, insufficient heat capacity, and slow reaction rate.

Therefore, in pest exterminators using this kind of catalyst, it is important to find out how to make the oxidative exothermic reaction between the small oxidation catalyst-supported ceramic, the organic volatile agent, and air active, and how to make the reaction stable and efficient. The challenge in commercialization is how to achieve this goal.

The present invention, when configuring a pest exterminator using the above-mentioned oxidation catalyst-supported ceramic as a heat source, is provided with a reaction cylinder having an intake port and an exhaust port, and the above-mentioned oxidation catalyst-supported ceramic is provided at the upper end opening of the reaction cylinder. A heating plate for heating a solid insecticide that is heated by the heat treatment is placed in the lower end opening of the organic volatile agent, and the oxidation catalyst-supported ceramic is placed in the reaction tube, and the oxidation catalyst-supported ceramic and the By forming an annular space between the reaction cylinder and the reaction cylinder, and further installing the reaction cylinder and the organic volatile agent in a case to form an annular space between the case and the reaction cylinder, The above-mentioned problem was solved by bringing the oxidation catalyst-supported ceramic into contact with the mixed gas (organic volatile agent and air) and actively carrying out the oxidation exothermic reaction, thereby carrying out a stable and efficient reaction.

Embodiments of the present invention will be described in detail below with reference to the drawings.

The oxidation catalyst-supported ceramic 1 has a porous structure with an oxidation catalyst attached or impregnated on its surface, and as shown in Fig. 1, it consists of small columnar blocks and has a large number of vertically long and mutually parallel ventilation holes. One of the openings 1a is the lower part and the other opening 1b is the upper part to form a vertical gas flow path, in which a mixed gas consisting of an organic volatile agent and air flows into the lower part of the oxidation catalyst-supporting ceramic 1. Opening 1a
The mixed gas is caused to flow through the upper opening 1b as a good upward air current, and the mixed gas caused by this flow comes into contact with the oxidation catalyst-supported ceramic 1 to cause an oxidation exothermic reaction, thereby generating heat in the oxidation catalyst-supported ceramic 1. It's getting old.

Reference numeral 2 denotes a reaction tube for subjecting the oxidation catalyst-supported ceramic 1 to an oxidative exothermic reaction. An organic volatile agent 4 is disposed below the lower end opening 2a, and an organic volatile agent 4 is arranged at the upper end opening 2b for heating the solid insecticide heated by the oxidation catalyst-supporting ceramic 1. A hot plate 5 is arranged. Further, the oxidation catalyst supporting ceramic 1 is placed in the reaction tube 2.
, an annular space is formed between the oxidation catalyst-supporting ceramic 1 and the reaction tube 2 as shown in the figure, and the reaction tube 2 is further placed in a case, and a space as shown in the figure is formed between the case and the reaction tube 2. It forms an annular space.

The reaction tube 2 is also provided with an intake port 6 for introducing outside air into the reaction tube 2, and an exhaust port 7 for discharging the gas inside the reaction tube 2 to the outside. The oxidation catalyst-carrying ceramic 1 is brought into contact with a mixed gas consisting of a chemical agent and air introduced from the intake port 6 to cause an oxidation exothermic reaction.

The oxidation catalyst supporting ceramic 1 has a rectangular parallelepiped shape,
One side of the reaction tube 2 is selected from 10 mm to 20 mm, and the inner diameter of the reaction tube 2 is selected from a range of 25 mm to 40 mm. The above-mentioned annular space is formed according to the above-mentioned dimension selection.

As shown in the figure, the case consists of an upper case 30 and a lower case 8, and both have a fitting structure (fitting part) 36 around their circumferences that can be freely fitted and removed, and there is a fitting area between the two. A partition wall 9 and a board 3 placed opposite to the top surface of this partition wall 9 to partition the case.
An assembly of the reaction tube 2, the oxidation catalyst-supporting ceramic 1, and the hot plate 5 is housed in the upper case 30 in the above arrangement with the substrate 3 and the partition wall 9 as the boundary, and The organic volatile agent 4 is housed in the lower case 8 .

The organic volatile agent 4 is contained in a container 10, and the container 10 is detachably fitted and held in a holding part 11 provided on the lower surface of the partition wall 9 of the lower case 8. Examples of the organic volatile agent 4 include methyl alcohol, etc.
Methanol, thinner, etc. can be used.

In addition, when storing the organic volatile agent 4 in the container 10, it may be stored in liquid form, or a capsule 37 impregnated with a porous material such as a nonwoven fabric or a cavernous body may be prepared and replaced. It is best to accommodate the

The storage section for the organic volatile agent 4 and the reaction tube 2 are assembled so as to be able to communicate with each other and to be disconnected via a later-described shutoff mechanism 18.

Further, the hot plate 5 is fixed so as to close the entire upper end opening 2b of the reaction tube 2. This hot plate 5 is made of a metal with good thermal conductivity and is formed into a rectangular shape, and is heated by the heat generated by the oxidation catalyst-supporting ceramic 1, and the pine-like solid insecticide 12 placed on the top surface is heated by this heat. It is used for gasification.

Next, the oxidation catalyst supporting ceramic 1 is opened at one opening 1.
A is placed on the lower side and the other opening 1b is placed on the upper side, and is inserted into the holder 13 provided on the lower surface of the hot plate 5 and held on the circumferential surface, forming a heat pool above the upper opening 1b of the oxidation catalyst-supporting ceramic 1. For this purpose, a space 14 is formed between the upper opening 1b surface of the oxidation catalyst supporting ceramic and the lower surface of the hot plate 5, and a mixed gas (vaporized gas of the organic volatile agent 4 and air) is formed in the lower part.
The lower end of the oxidation catalyst-supporting ceramic is exposed below the lower end of the holder 13 to form an exposed portion 15 in order to enhance the heat generation effect through contact with the holder 13.

Further, a ventilation hole 16 is provided at a position close to the hot plate 5 on the upper part of the holder 13 so as to communicate the space 14 and the reaction tube 2.
The high-temperature heated gas accumulated in the space 14 formed at the upper part of the chamber 3 flows out along the lower surface of the hot plate 5 and is exhausted into the reaction tube 2 while heating the hot plate 5. This is to promote the upward flow of gas within the chamber 1, that is, the inflow of fresh mixed gas.

It should be noted that the same effect can be achieved even if several appropriately shaped notches or gaps are formed as the ventilation holes 16 in the vicinity of the fixed portion between the lower surface of the hot plate 5 and the holder 13.

Reference numeral 17 denotes a pressing member such as a leaf spring for preventing the pine-shaped solid insecticide 12 placed on the upper surface of the hot plate 5 from moving.

On the other hand, the intake port 6 is for introducing into the reaction tube 2 air that mixes with the organic volatile agent 4 that volatilizes and rises inside the reaction tube 2 to produce a mixed gas. This inlet port 6 is connected to the oxidation catalyst-supported ceramic 1 so that the air introduced into the reaction tube 2 mixes with the organic volatile agent 4 and contacts the oxidation catalyst-supported ceramic 1 to efficiently carry out the oxidation exothermic reaction. It is desirable to provide it below the bottom end. The diameter of the inlet 6 determines the amount of outside air introduced into the reaction tube 2 and is therefore involved in setting the temperature necessary for gasifying the solid pesticide 12.

In addition, the reaction tube 2 is connected to the intake port 6 formed in the reaction tube 2.
Providing an intake pipe 29 that protrudes outward from the outer peripheral surface of the reactor with an appropriate length prevents the organic volatile agent 4 rising inside the reaction tube 2 from flowing out of the reaction tube 2 through the intake port 6. This is effective in that it is not directly affected by the flow of outside air outside the reaction tube 2.

The exhaust port 7 is for discharging the hot reaction gas flowing out from the vent hole 16 formed in the holder 13 to the outside of the reaction tube 2. It is arranged at approximately the same height position as, that is, at a position close to the lower surface of the hot plate 5 near the upper end opening 2b of the reaction tube 2.

This exhaust port 7 exhausts the gas inside the reaction tube 2,
Outside air in an amount corresponding to the displacement is introduced into the reaction tube 2 from the intake port 6, and a mixed gas corresponding to the displacement is caused to flow through the oxidation catalyst-supporting ceramic 1, and the openings of the exhaust port 7 and the intake port 6 are By setting the area, the degree of reactivity, that is, the exothermic temperature is set.

Here, the blocking mechanism 18 provided between the lower end opening 2a of the reaction tube 2 and the organic volatile agent 4 disposed below the lower end opening 2a will be explained.

This blocking mechanism 18 includes a disk-shaped shutter 19 rotatably conveyed between the substrate 3 and the partition wall 9. To explain with a specific example, the substrate 3 and the partition wall 9
corresponds to the inner diameter of the reaction tube 2, and the shutter 1
A circular recess 20 having the same diameter as 9 and concentric with the axis of the reaction tube 2 is formed, and this is fitted into the shutter 19, so that the inner peripheral surface of the circular recess 20 and the outer peripheral surface of the shutter 19 are aligned so that they are in sliding contact. do. This circular recess 2
Fan-shaped upper openings 21a and 21b are formed in each of the symmetrical quadrants in the part of the substrate 3 in which 0 is formed, and the reaction tube 2 corresponding to the opening of the container 10 is formed in the partition wall 9 of the lower case 8. An opening 23 coaxial with the axis of
is formed.

On the other hand, the shutter 19 has a circular recess 20 in the substrate 3.
It is symmetrical in a quadrant different from the upper openings 21a and 21b formed in the upper opening 21
A fan-shaped lower opening 2 having approximately the same shape as a and 21b
2a and 22b are bored, and the shutter 19 is rotated concentrically within the circular recess 20 of the substrate 3 to connect or block the upper and lower openings.

Therefore, when the shutter 19 is in the state shown in FIG. 4, the upper openings 21a, 21b and the lower opening 22
Since a and 22b are in different quadrants, the container 10
Although the volatilization of the organic volatile agent 4 in the reaction tube 2 and the flow into the reaction tube 2 are blocked, the shutter 19 is rotated 90 degrees in the direction of arrow A in FIG.
1b and the lower openings 22a and 22b, respectively, the blocking is released and the organic volatile agent 4 in the container 10 is released.
evaporates and flows into the annular space of the reaction tube 2, mixes with air introduced into the annular space, and flows into the oxidation catalyst-supporting ceramic 1. The shutter 19 is rotated by operating an operating rod 24 provided on the shutter 19 in the circumferential direction of the base plate 3.
A cutout part 25 is cut out over 90 degrees in the circumferential direction, and a cutout part 25 is cut out in the upper part of the lower case 8 in a corresponding manner in the circumferential direction.
By forming a groove 26 extending over 90 degrees, an operation groove having an opening angle of approximately 90 degrees is bored between the base plate 3 and the partition wall 9 so as to communicate with the outside, and the rotation angle of the operation rod 24 is set and operated. It is becoming more and more common.

Note that this blocking mechanism 18 may be constructed at the lower end of the reaction tube 2 as long as it is between the oxidation catalyst-supporting ceramic 1 and the organic volatile agent 4, or it may be constructed on the partition wall 9 of the lower case 9. is also good.

FIGS. 5 to 7 show other examples of the above-mentioned shutoff mechanism. The board 3 is provided integrally with the upper case 30,
This substrate 3 is formed with openings 21a and 21b corresponding to the opening of the container 10 similar to the embodiment described above, and the partition wall 9 of the lower case 8 is formed with openings 22a and 22b similar to the shutter 19 of the embodiment described above. are bored, and both 3 and 9 are placed in sliding contact facing each other. A plurality of protrusions 27 are provided on the outer periphery of the substrate 3 in the circumferential area of the fitting portion 36 of the upper and lower cases 30 and 8 at appropriate intervals in the circumferential direction and that protrude appropriately outward from the outer periphery of the substrate 3. A circumferential groove 28 is formed in the upper inner circumferential surface of the lower case 8 so that the protrusion 27 can be freely engaged and disengaged and the protrusion 27 can slide in the circumferential direction. That is, the substrate 3
(That is, the upper case 30) and the lower case 8 are rotatably engaged with each other.

The upper case 30 has an intake opening 31 and an intake opening 32 formed on its side surface, respectively, corresponding to each intake port 6 and each exhaust port 7 formed in the reaction tube 2, and can be opened and closed by a hinge 33 or the like at its upper end. It is equipped with a lid 34 that allows the solid insecticide 12 to be replaced. The lid 34 has a plurality of ventilation holes 35 in its ceiling for diffusing the insecticidal gas of the solid insecticide 12 gasified by the heat of the hot plate 5 heated by the heat generated by the oxidation catalyst-supported ceramic 1 to the outside. There are several.

Since it is formed as described above, the organic volatile agent 4 becomes a reaction gas and flows into the reaction cylinder 2, filling the annular space thereof. On the other hand, air is introduced into the annular space from each intake port 6 of the reaction tube 2, and is sufficiently mixed with the organic volatile agent in the annular space surrounding the oxidation catalyst-supporting ceramic, becoming a uniform gas mixture and leaving the ceramic 1. The mixed gas flows through from the lower opening 1a to the upper opening 1b as a good upward air current, and the oxidation catalyst-supported ceramic 1 generates heat due to contact between the mixed gas and the oxidation catalyst-supported ceramic 1 during this flow-through, and the oxidation catalyst-supported ceramic 1 generates heat. The heating plate 5 is heated by the heat generated by the heating element 1.

When the hot plate 5 is heated, the solid insecticide 4 placed on the upper surface of the hot plate 5 is gasified by the heat of the hot plate 5 to generate insecticidal gas. The generated insecticidal gas then diffuses to the outside through each ventilation hole 35 provided in the ceiling of the lid 34.

The reaction tube 2 is placed in a case so as to have an annular space around its outer periphery, and the oxidation exothermic reaction occurs within the reaction tube, so that the exothermic reaction is not disturbed by outside air. To stably and safely carry out the exothermic reaction.

In the space 14 formed above the upper opening 1b of the oxidation catalyst-supporting ceramic 1 due to the heat generation,
Although the heated gas stays and accelerates the heating of the hot plate 5,
This stagnant heated gas is gradually released from the vent hole 16, and as the gas is released, the mixed gas inside the reaction tube 2 is promoted to rise.

Then, the heated gas exhausted into the reaction tube 2 is discharged to the outside (inside the case) from each exhaust port 7 of the reaction tube 2, and in response to this exhaust, outside air is introduced from the intake port 6, and the oxidation catalyst of the mixed gas is catalyzed. This leads to an influx into the supported ceramic 1.

The above actions continue to exterminate pests (or repel pests).

As mentioned above, in pest exterminators using this type of catalyst, it is important to know how to actively carry out the contact between the oxidation catalyst-supported ceramic of a limited size and the mixed gas (mixed gas of an organic volatile agent and air) or the oxidative exothermic reaction. The challenge in commercialization is how to obtain a stable and efficient reaction.

As explained above, in the present invention, an oxidation catalyst-supporting ceramic is disposed in a reaction cylinder having an inlet and an exhaust port, with an annular space therein, and the reaction cylinder is housed in a case with an annular space. While configuring
The organic volatile agent is placed in the lower opening of the reaction tube, and a hot plate is placed in the upper opening of the reaction tube to obtain the oxidation exothermic reaction, so that air and organic volatile agent are stabilized in the annular space of the reaction tube. The oxidation exothermic reaction can proceed stably and actively without causing any disturbance, resulting in a highly efficient oxidation exothermic reaction. It can promote fever.

Further, the oxidative exothermic reaction described above can be carried out safely within the case. Therefore, the present invention can very effectively solve the above-mentioned problems in this type of pest exterminator using ceramic supporting an oxidation catalyst.

[Brief explanation of the drawing]

The drawings show embodiments of the present invention; FIG. 1 is a perspective view of ceramic supporting an oxidation catalyst, FIG. 2 is a sectional view of a pest exterminator, FIG. 3 is a sectional view taken along the line - The figure is a sectional view taken along the - line in Fig. 2, Fig. 5 is a sectional view taken along the - line in Fig. 5, Fig. 6 is a sectional view taken along the - line in Fig. 5, and Fig. 7 is a sectional view taken along the - line in Fig. 5. It is. DESCRIPTION OF SYMBOLS 1... Ceramic supporting oxidation catalyst, 2... Reaction tube, 2a... Lower end opening of reaction tube, 2b... Upper end opening of reaction tube, 4... Organic volatile agent, 5... Hot plate, 6... Intake port, 7...Exhaust port, 8...Lower case, 30...Upper case.

Claims (1)

[Claims] 1. Equipped with a reaction column having an intake port and an exhaust port, an organic volatile agent is heated at the bottom opening of the reaction column, and an oxidation catalyst-supporting ceramic is heated at the top opening of the reaction column. In addition to arranging hot plates for heating the solid insecticide, the oxidation catalyst-supporting ceramic is arranged in the reaction cylinder, an annular space is formed between the oxidation catalyst-supporting ceramic and the reaction cylinder, and the reaction A pest exterminator characterized in that a cylinder and the organic volatile agent are placed in a case, and an annular space is formed between the case and the reaction cylinder.