JPS642843B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Field of Industrial Application The present invention relates to a catalytic heater in which an oxidation catalyst carrier is brought into contact with an organic volatile material which is a combustible gas to obtain a combustion exothermic reaction.

The catalytic heat generator constitutes, for example, a heat source for various fume generators that heat and evaporate insecticidal materials or aromatic materials, or a heat source for water heaters, hot water heaters, and the like.

Technical Background of the Invention In general, the above-mentioned catalytic heating device is arranged in an envelope so that the above-mentioned catalyst carrier is on the upper side and the organic volatile material is on the lower side, and the outside air and the organic volatile material are introduced into the envelope through the intake port. The structure is such that a combustible gas that is more volatile is mixed, and the mixed gas is brought into contact with a catalyst carrier to cause a combustion reaction and generate heat.

For example, in a hume generator, a heating plate is heated with the above reaction heat, and insecticidal pine or aromatic pine (pine impregnated with each hume component) placed on the heating plate is heated to evaporate the hume components. take.

Therefore, the above-mentioned fume generator and the like are required to generate an exothermic reaction as quickly as possible due to their commercial purpose, and to be able to quickly and reliably obtain the necessary high temperature.

These performances are related to whether the introduction of outside air is stable and sufficient, mixing with combustible gas is promoted, and in addition, whether the mixed gas is brought into active contact with the catalyst carrier.

Generally, the outside air mentioned above is not introduced from the side of the envelope.
An exhaust section is provided at the top, and in the process, the above gases are mixed and brought into contact for reaction to obtain the desired heat generation.

However, this type of intake structure lacks the effect of attracting outside air into the envelope, and tends to be insufficiently mixed with the flammable gas that volatilizes and rises within the envelope. This results in a slow rise in the exothermic reaction and a slow time to reach a high temperature.

Furthermore, for example, for pyrethroid drugs intended to kill insects such as mosquitoes, a heat generation of up to 200°C is sufficient, but if the hume component requires heat generation at a higher temperature, conventional hume generators have a limit to the heat generation temperature. Therefore, it is difficult to meet the demand.

Purpose of the invention The present invention allows sufficient outside air to be introduced, and
By promoting the generation of mixed gas and making the contact between the catalyst carrier and the mixed gas more effective, it is possible to generate heat at the above-mentioned temperature in the catalyst carrier, increasing the scope of application of the catalyst heater to, for example, 300°C heat generation. To provide a heat generator that can be used for heating and evaporating agricultural chemicals, cockroach extermination drugs, etc. that require

The present invention also provides a catalyst heat generator that makes the reaction between the catalyst carrier and the combustible gas more sensitive, allows the predetermined exothermic temperature to be reached more quickly, and makes the combustion exothermic reaction in the catalyst carrier more stable.

Structure of the Invention In order to achieve the above-mentioned object, the present invention provides a catalytic heating device in which an oxidation catalyst carrier is arranged above the organic volatile material, and the organic volatile material is arranged at the inner bottom of an envelope constituting the heating device. At the same time, an inlet is provided in the bottom wall of the envelope to pass through the organic volatile material, preferably the inlet is provided in the center of the organic volatile material, and the lower end of the inlet is provided at the bottom of the envelope in contact with outside air. Open it,
The upper end of the intake port is opened near the volatilization surface of the organic volatile material, and an upward airflow that can pass through the organic volatile material is generated through the intake port, and while promoting the volatilization of the organic volatile material around the upward airflow, the organic volatile material is evaporated. In addition to obtaining the mixture with the combustible gas, the upper opening of the intake port is arranged directly below the oxidation catalyst carrier, and the mixed gas comes into contact with the catalyst carrier in the ascending air flow path to cause a combustion exothermic reaction. , characterized in that the exothermic action further promotes the inflow of the outside air and the generation of the mixed gas, thereby promoting the reaction.

Embodiments of the Invention The present invention will be further described in detail below based on the embodiments shown in FIGS. 1 to 5.

The drawing illustrates a fume generator. In the figure, 1 indicates the envelope of the fume generator. 2 shows a catalyst carrier on which an oxidation catalyst is supported by coating, impregnation, or other methods; a typical example is honeycomb ceramic.
Further, 3 indicates a liquefied or solidified organic volatile material such as butane or methanol, which is a combustible gas.

The organic volatile material 3 and the oxidation catalyst carrier 2 are housed in the envelope 1 such that the former is on the lower side and the latter is on the upper side. Reference numeral 4 denotes a heating plate for heating the mat supporting the hume component, and is installed parallel to the upper surface of the oxidation catalyst carrier 2.

The honeycomb ceramic serving as the oxidation catalyst carrier 2 has a rectangular parallelepiped shape, and its ventilation holes 2a are arranged vertically, with the lower opening facing the organic volatile material 3 and the upper opening facing the heating plate 4, respectively.

FIGS. 4 and 5 show an assembly of the oxidation catalyst carrier 2 and the heating plate 4 that hold them in the above positions. In the same figure, reference numeral 5 denotes a support seat plate for the honeycomb ceramic, and the seat plate 5 is raised from a frame plate 5a and a pair of frame pieces of the frame plate 5a along the side surface of the honeycomb ceramic and then bent laterally. Inverted L-shaped mounting arm plate 5
It consists of b.

Then, the honeycomb ceramic is placed on the frame plate 5a and its lower edge is supported by each frame piece, and the heating plate 4 is placed on the upper surface of the honeycomb ceramic with a gap 6 therebetween. The mounting plate 4a provided on both ears and the mounting arm plate 5b are stacked with a spacer 7 interposed therebetween, and are tightened with screws 8 to assemble them together.

The spacer 7 forms a gap 6 between the upper surface of the honeycomb ceramic serving as the catalyst carrier 2 and the heating plate 4. Depending on the implementation, a heat insulating spacer 9, for example a ceramic piece, is interposed in the gap 6 to hold down the honeycomb ceramic and firmly hold the ceramic between the support seat plate 5 and the heating plate 4. The side surface of the honeycomb ceramic may be held between the upright plate portions 5c of the mounting arm plate 5b.

Further, the assembly as described above is fixed to the upper wall of the envelope 1 with screws 10 using the mounting arm plate 5b, and is integrated with the envelope 1. A spacer 11 is also interposed between the mounting arm plate 5b and the upper wall of the envelope to float the entire assembly as shown.

Although not shown, the envelope 1 is provided with a lid with exhaust holes so as to cover the heating plate 4 and its assembly.

Thus, the organic volatile material 3 is held directly below the oxidation catalyst carrier assembly arranged as described above, that is, at the inner bottom of the envelope 1.

The organic volatile material is used in a solid state or in a liquefied state, and in the case of liquefaction, the material impregnated with this is retained. In order to make the organic volatile material exchangeable, for example, as shown in the figure, a container part (envelope leg part) 1b that accommodates the organic volatile material and an envelope head part 1a that holds the catalyst carrier assembly are combined. It can be fitted and removed using the coupling part 12. Although not shown, the organic volatile material 3 may be held in a capsule, and the capsule may be detachably attached to the bottom of the envelope.

Further, one or more air intake ports 14 are bored in the bottom wall 13 of the envelope forming a storage chamber for the organic volatile material, and the organic volatile material 3 is passed through the intake ports 14 . That is, the intake port 14
The organic volatile material 3 is arranged so as to surround the periphery. 17 is a nozzle forming the intake port 14.
Preferably, the air inlet 14 is provided through the center of the organic volatile material 3 as shown in FIG.

Thus, the lower end of the intake port 14 is opened at the bottom surface of the envelope in contact with the outside air, and the upper end of the intake port 14 is opened near the volatilization surface of the organic volatile material. Envelope 1
A leg piece 15 is provided to form an air sampling space 18 directly below the lower end opening of the air intake port 14, and the air sampling space 18 is formed under the bottom surface of the envelope through the ventilation part 16 between the leg pieces 15.
The outside air is introduced into the envelope 1 through the intake port 14 without being affected by disturbance factors.

As a result of the above, the outside air flows into the envelope through the intake port 14 as an upward current that can flow through the organic volatile material. On the other hand, the organic volatile material 3 is promoted to volatilize around the rising air current, and the exchange and mixing with the combustible gas volatilized and rising from the organic volatile material 3 is facilitated, and the generation of mixed gas is promoted.

The oxidation catalyst carrier 2 is arranged on the rising air flow path from the intake port 14. That is, the upper opening of the intake port 14 is arranged directly below the oxidation catalyst carrier 2, so that the rising airflow of the mixed gas directly flows into the oxidation catalyst carrier 2.
The heating plate 4
The configuration is such that it collides with the

As a result of the above, an active combustion exothermic reaction is obtained in the oxidation catalyst carrier 2, and the carrier 2 rapidly becomes red-hot to a predetermined high temperature. The convection heat hits the heating plate 4, heats it with good thermal efficiency, and heats the hume component-supporting mat placed on it. As a result, the gasified hume component is diffused into the atmosphere and exerts a predetermined effect.

As the combustion exothermic reaction occurs in the oxidation catalyst carrier 2 and the surrounding atmosphere becomes high temperature, this further generates an attractive force of upward airflow from the intake port 14,
Promote the introduction of outside air. This further enhances the combustion exothermic reaction, creating a virtuous cycle.

As a mode of the intake port 14, as shown in FIG. 2A, the nozzle 17 forming the intake port 14
4, and the organic volatile material 3 is provided only in a part of the intake port 1.
It is also possible to expose within 4. Further, as shown in FIG. 2B, it is possible to provide a conical nozzle 17 so that the intake port 14 becomes narrow at the top, or to use this together with a conical nozzle 17 to provide a through hole 17a in the inner wall of the nozzle 17. be.

Effects of the Invention As explained above, according to the present invention, outside air can be rapidly introduced into the envelope from the bottom wall of the envelope as an upward airflow. Then, the combustible gas is evaporated around the rising air current, allowing for good exchange and mixing between the two, thereby promoting the generation of mixed gas.

Further, the mixed gas rides on the upward airflow and directly collides with the lower surface of the oxidation catalyst carrier, causing an extremely active combustion exothermic reaction. Furthermore, the rise in the heated atmosphere accompanying this combustion exothermic reaction more strongly induces an upward flow of outside air from the intake port directly below, further promoting the generation of mixed gas. As a result, a favorable result is produced in which the combustion exothermic reaction in the oxidation catalyst carrier is further promoted.

As a result of the above, the present invention has been able to provide a catalytic heat generator in which the combustion exothermic reaction is sharp, the rise to a predetermined high temperature is good, and the oxidation reaction is stable. In addition, until now, it has been considered difficult to generate stable heat when applied to this type of catalytic heat generator, especially a hume generator200
High-temperature heat generation of 300°C or more can be easily obtained,
For example, the scope of its use can be further expanded, such as exterminating cockroaches and heating and gasifying agricultural chemicals.

[Brief explanation of drawings]

FIG. 1 is a cross-sectional view of a catalytic heater showing an embodiment of the present invention, FIGS. 2 A and B are enlarged sectional views showing embodiments of the inlet, respectively, and FIG. 3 is a bottom view of the catalytic heater of FIG. 1. , FIG. 4 is an exploded perspective view of the oxidation catalyst carrier and heating plate assembly, and FIG. 5 is an assembled perspective view of the same. DESCRIPTION OF SYMBOLS 1... Envelope, 2... Oxidation catalyst carrier, 3... Organic volatile material, 4... Heating plate, 14... Inlet port, 15
... Leg piece, 17 ... Nozzle, 18 ... Air intake space.

Claims (1)

[Scope of Claims] 1. An organic volatile material is disposed in a lower part and an oxidation catalyst carrier is placed in an upper part in an envelope, and a flammable gas volatilized from the organic volatile material is brought into contact with the oxidation catalyst carrier. In a catalytic heat generator that generates heat through a combustion reaction, the organic volatile material is arranged at the inner bottom of the envelope, and an intake port is provided in the bottom wall of the envelope to penetrate the organic volatile material, and the lower end of the intake port is connected to outside air. The upper end of the inlet port is opened near the volatilization surface of the organic volatile material, and an upward air current that flows through the organic volatile material is generated through the inlet port to volatilize it from the organic volatile material. The configuration is such that the mixture with the combustible gas is obtained, and the upper opening of the intake port is arranged directly below the oxidation catalyst carrier so that the mixed gas comes into contact with the catalyst carrier in the ascending air flow path. Features a catalytic heat generator. 2 In the invention described in claim 1,
A catalytic heat generator characterized in that the above-mentioned intake port is provided through the center of the organic volatile material. 3 In the invention described in claim 1,
A catalytic heat generator characterized in that a space is formed below the lower opening of the intake port.