JPS64775Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a heat-generating plate made of a composite plate of an oxidation catalyst-supported ceramic plate and a metal plate. It was invented for the purpose of preventing and killing insects.

A solid insecticide made from a pyrethroid insecticide is formed into a rectangular pine shape by impregnating and solidifying an oxidation catalyst in a suitable medium, and the solid insecticide is placed on a hot plate that is heated by electricity. The system has a mechanism for placing the mats in close contact with each other for gasification, and the need arises because, outdoors, where it is difficult to secure a power supply, there is no suitable heating source for gasification other than the power supply. Despite being
It has not yet reached the point of generalization.

As stated at the beginning, the present invention relates to a heat generating plate that uses a flat ceramic plate that generates heat through oxidation reaction as a heat source, and that has a composite plate structure of the ceramic plate and a metal plate and is made into a single component. In addition, the flat heat-generating plate is expected to be in very high demand as a power-free heat source for heating and gasifying solid insecticides such as those mentioned above, and it enables outdoor application and portable use of this type of solid insecticide. Its practical value is extremely great.

The above-mentioned oxidation catalyst-supported ceramic is one in which an oxidation catalyst such as platinum (hereinafter simply referred to as an oxidation catalyst) is supported on the surface of the ceramic by a method such as coating or impregnation. When it comes into contact with an organic volatile agent, it undergoes a violent oxidation reaction and becomes red hot in a short time, making it possible to easily obtain a heating temperature of about 100 to 200°C, which is the gasification temperature of the pyrethroid insecticide. The present invention aims to provide a heat generating plate having a composite plate structure in which the ceramic plate and the metal plate are closely opposed to each other by using the ceramic plate supporting the oxidation catalyst. The composite plate structure with voids can be easily formed with a simple structure without using harmful adhesives, and the ceramic plate and the metal plate can be efficiently heated in the composite plate state. The gap between the ceramic plate and the metal plate is such that the metal plate functions well as a support plate and heating plate for the solid insecticide, and in addition, the ceramic plate generates heat and the metal plate is heated. To provide a heat generating plate which can be properly and easily formed while making the composite plate strong.

Embodiments of the present invention will be described in detail below with reference to FIGS. 1 to 4.

As shown in FIGS. 1 to 4, an oxidation catalyst-supported ceramic plate 1 is constructed by coating or impregnating an oxidation catalyst on the upper and lower surfaces.
A metal plate 2, which functions as a support plate and a heating plate for solid insecticide pine 3, is placed on top of the bottom surface of the metal plate 2, and the metal plate 2 and the oxidation catalyst-supporting ceramic plate 1 are stacked on top of each other.
are integrated into a composite plate structure.

As shown in FIG. 1, two or four sides of the metal plate 2 extend around the ceramic plate 1, and the projecting plate portions serve as hot gas receiving plates 2a.

In order to more efficiently capture the hot air around the ceramic plate heated by the self-heating of the ceramic plate 1, FIG. It surrounds the plate and forms a hot air reservoir inside the hot air receiving plate 2b.

An air escape hole 2c is formed in the protruding portion of the hot air receiving plate 2b surrounding the ceramic plate to induce an air flow and appropriately introduce new air into the enclosure and bring it into contact with the ceramic plate 1.

A solid insecticide mat 3 is placed on the upper surface of the metal plate 2, fixed on the metal plate by suitable holding means, and is directly heated by the metal plate 2 to be gasified.

FIG. 3 shows an example in which the metal plate 2 is provided with means for holding down the mat 3, and FIG. Figure B shows a case where a pair or more of holding pieces 4b are formed to push the mat 3 onto the upper surface of the metal plate 2 using a cut-and-raised piece or the like and removably hold the edges of the mat 3. shows.

The ceramic plate 1 and the metal plate 2 are as shown in FIGS. 4A to 4C.
A gripping piece 5a or 5b is provided to securely hold the edge of the composite plate.

4A and 4C show that a part of the metal plate 2 is cut and bent, and in FIG. is held between the metal plate main body and has a composite plate structure. In addition, in making the composite plate, as shown in FIG. A void 7 is formed to allow gas to flow. Similarly, grooves may be formed on the lower surface of the metal plate 2 to promote gas flow.

The oxidation catalyst is applied to the entire surface of the ceramic plate 1, and a composite plate is formed such that the lower surface of the metal plate 1 and the oxidation catalyst layer face each other with the gap 7 interposed therebetween.
The exothermic reaction and heating are promoted.

The heating plate is placed above a container containing an organic volatile agent (either solid or liquid), and the organic volatile agent is volatilized from below and supplied together with air to the lower surface of the ceramic plate.

The organic volatile agent and the heat generating plate are assembled in a suitable envelope, and the generation and stopping of the heat generation are controlled by opening/closing means for cutting off and supplying the volatile agent.

The present invention also includes a perforated plate structure in which a plurality of holes 8 are drilled through the ceramic plate 1 from its lower surface to its upper surface facing the metal plate 7 as shown in FIG. 4C in the above embodiment.

As explained above, the upper surface of the ceramic plate is held on the metal plate while holding the edge of the ceramic plate supporting the oxidation catalyst with a gripping piece formed by cutting and bending a part of the metal plate. By providing small supporting protrusions, the metal plate and the oxidation catalyst can be made into a composite plate that is strong against heat and impact, and a gap to promote heat generation can be properly and reliably formed between the metal plate and the oxidation catalyst in the composite plate structure. The structure of the heat-generating plate in which the oxidation catalyst-supported ceramic plate and the oxidation catalyst-supported ceramic plate are formed into a composite plate in close proximity to each other through a gap can be easily formed with a simple structure without using adhesive bonding that would cause thermal deterioration or inhibit heat generation efficiency. It is possible to provide a heating unit suitable for being incorporated into an insecticide as a heat source without a power source when it is made into flat strips.

Furthermore, by making the above-mentioned composite plate, the flat metal plate and the oxidation catalyst-supporting ceramic plate can be handled as a single component, and not only can they be incorporated into the insecticide in an appropriate relative arrangement, but also the above-mentioned ceramic plate, which is fragile and easily damaged, can be handled as a single component. By making the plate a composite plate with a metal plate or by making it into a single component, it can be reliably protected and damage can be effectively prevented.

In addition, by forming a composite plate into a single component as described above, the gap between the metal plate and the oxidation catalyst-supporting ceramic plate can be maintained properly at all times, and active and stable heat generation and By promoting heating, it is possible to efficiently generate heat and heat the metal plate using a flat ceramic plate.

[Brief explanation of the drawing]

Fig. 1 is a sectional view showing a case where a hot gas receiving plate is formed on the metal plate constituting the heat generating plate of the present invention, and Fig. 2 shows a case where the receiving plate is bent into a shape to surround a ceramic plate. Figure A is a cross-sectional view of a heat-generating plate illustrating a means for fixing solid insecticide pine on a metal plate, and Figure B is a cross-sectional view of a heat-generating plate showing another example. A and C are cross-sectional views of a heating plate showing a specific example of a composite plate structure made of a ceramic plate and a metal plate; A sectional view of a heat generating plate showing a specific example of forming a composite plate structure of a plate and a metal plate, and Figure B is a sectional view of a heat generating plate showing another example.
Figure C is a sectional view of the heat generating plate, also showing means for forming a gap between the two. 1... Ceramic plate supporting oxidation catalyst, 2... Metal plate, 3... Solid insecticide pine, 5a, 5b...
Grip piece, 6... small projection, 7... void.

Claims (1)

[Scope of utility model registration request] The upper surface of the oxidation catalyst-supporting ceramic plate is superimposed on the lower surface of the metal plate whose upper surface serves as a support surface for the solid insecticide, and the edge of the oxidation catalyst-supporting ceramic plate is held by a gripping piece formed from a part of the metal plate. A heat generating plate, characterized in that the metal plate is provided with small protrusions that support the upper surface of the oxidation catalyst-supported ceramic plate to form a gap between the metal plate and the oxidation catalyst-supported ceramic plate.