JPS60188025A - Catalytic heater - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] Industrial Field of Application The present invention relates to a catalytic heater that utilizes heat generated by a catalytic reaction of gas, and is used in mosquito repellents and the like as a cover for insecticidal agents. Ah A.

Conventional configurations and their problems In recent years, applied products using catalysts are being developed in various fields due to their major feature of energy and no power source.

Hereinafter, a conventional catalytic heater (previously proposed by the present inventors) will be described with reference to the drawings.

FIG. 1 shows a conventional catalytic heater.

In Fig. 1, 1 is a gas tank, 2 is a gas nozzle for ejecting gas provided at the top of the gas tank 1, 3 is a nozzle spring that tries to push the gas nozzle 2 up to the normally open state, and 4 is a nozzle spring placed directly on the gas nozzle 2. A gas burner having a plurality of gas ejection holes on the outer periphery of the upper part, 5 a catalyst such as platinum arranged on the outer periphery of the gas ejection holes of the gas burner 4, 6 a combustion pipe for guiding the gas burner 4, 7 a combustion vibro with both ends and a central part Bimetals for temperature control are respectively engaged and supported by the gas burners 4; 8 is a gas lever for main operation that is linked with the operation switch 12 and opens and closes the gas nozzle 2; 9 is a heat sink; 10 is a protective top cover; 11 is a gas lever for opening and closing the gas nozzle 2; The case body arranged at the bottom is shown.

The operation of the conventional catalytic heater configured as described above will be described below.

When the operation switch 12 is operated in the ON direction without being turned off, the gas nozzle 2 and the main operating gas lever 8 are pushed up by the nozzle spring 3, and gas starts to be ejected. Immediately after this, when the gas is ignited by an appropriate means, the ejected gas passes through the gas burner 4 and passes through the catalyst 5 from the gas ejection hole of the gas burner 4 provided on the upper outer periphery, where heat is generated by a catalytic reaction. . At the same time as the heat is generated, the bimetal 7 is also heated and curved in the direction of arrow B, the gas nozzle 2 is pushed down by the gas burner 4, the amount of gas ejected is suppressed, the heat generation by the catalytic reaction is reduced, and the temperature rise of the heat sink 9 is suppressed. It is something that Conversely, when the temperature decreases due to a decrease in the amount of gas ejected, the bimetal 7 is returned in the direction of arrow A, the gas nozzle 2 is pushed up by the nozzle spring 3, and the amount of gas ejected increases, and as a result, the heat sink 9 The structure is such that the heat sink is further heated and the temperature rises, and as a result of repeating the above process, the heat sink 9 is always kept at a constant temperature range by the temperature control of the bimetal 7.

However, in the above configuration, the gas burner 4 is placed directly on the gas nozzle 2, and the gas burner 4, which is heated to several hundred degrees due to the heat generated by the catalyst 6, heats the gas nozzle 2 to a high temperature by its heat conduction. This impairs the performance of the gas nozzle 2, causes variations in the amount of gas ejected, and in the worst case, there is a danger that the gas tank 1 may explode, so it is not practical.

Purpose of the Invention In view of the above-mentioned drawbacks, the present invention aims to provide a high-performance and safe catalytic heater that makes it difficult for heat to be transferred from the gas burner to the gas nozzle, suppresses variations in the amount of gas ejected from the gas nozzle, and prevents heating of the gas tank. It is something.

Structure of the Invention In order to achieve this object, the catalytic heater of the present invention is provided with a nozzle guard made of a heat-resistant material with low thermal conductivity at the joint between the gas burner and the gas nozzle. Since there is no heat conduction to the gas nozzle, heating of the gas nozzle is consequently drastically reduced.

DESCRIPTION OF EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 shows a catalytic heater in one embodiment of the present invention. In FIG. 2, a nozzle guard 13 connects the gas nozzle 2 and the gas burner 14, and is made of a resin material or a ceramic material that has relatively low thermal conductivity and heat resistance. The other configurations are the same as those of the conventional example, so explanations will be omitted.

As described above, according to this embodiment, by providing a nozzle guard made of a material with relatively low thermal conductivity and heat resistance at the connection part between the gas burner and the gas nozzle, heat conduction to the gas nozzle and the gas tank part is improved. This prevents abnormal heating.

Effects of the Invention As described above, the present invention provides a nozzle made of a resin material or ceramic material having relatively low thermal conductivity and heat resistance at the connection part between the gas burner that performs catalytic combustion in the upper part and the gas nozzle. By providing the guard, the heat of the catalytic reaction is not directly conducted to the gas nozzle, and as a result, abnormal heating of the gas nozzle and the gas tank can be prevented. This suppresses the rise in temperature of the gas nozzle, reduces variations in the amount of gas ejected due to heat, and reduces variations in temperature control. In addition, by preventing heating of the gas tank containing flammable gas, it is possible to realize a highly reliable and high-performance catalytic heater in terms of safety, and its practical value is significant.

[Brief explanation of the drawings] Fig. 1 is a partially sectional front view showing a conventional catalytic heater;
The figure is a partially sectional front view showing a catalytic heater in one embodiment of the present invention. 1... Gas tank, 2... Gas nozzle 5... Catalyst, 6... Combustion pipe for guide, 7... Bimetal for temperature control, 12 ...
...Case body, 13...Nozzle guard, 1
4... Gas burner. Name of agent: Patent attorney Toshio Nakao and 1 other person No. 1
figure

Claims (1)

[Claims] A gas tank with a gas nozzle on the top is provided at the bottom of the case body, a gas burner having a plurality of gas ejection holes on the outer periphery of the upper part is provided on the gas nozzle, and a catalyst is disposed on the outer periphery of the gas ejection hole of the gas burner. A bimetal for temperature control is provided at both ends of the guide combustion pipe and the central portion thereof is secured and supported by the gas burner, and a nozzle made of a heat-resistant material with low thermal conductivity is provided at the connection portion between the gas burner and the gas nozzle. Catalytic heater becomes through the guard.