JPS6017614A - Catalytic combustion device - Google Patents

Abstract

PURPOSE:To enable to obtain the stable supply of mixed gas by a structure wherein air intake ports are arranged in a gas supplying tube joined to a nozzle at the position near the tip part of the nozzle. CONSTITUTION:A gas supplying tube 21, on the side part near the tip of a nozzle 16 of which air intake ports 22 are formed, is joined to the tip of the nozzle 16 by fitting with each other. Said gas supplying tube 21 is joined at its tip to an outer tube 24, which is made of material with large thermal expansion coefficient and the end on the nozzle 16 side of which is fixed to a fixed member. In the structure as mentioned above, a certain fixed positional relationship is kept between the air intake ports 22 and the nozzle 16. Accordingly, no change of the rate of air intake, which has conventionally generated due to the shifting of the nozzle 16, occurs, resulting in enabling to realize the stable catalytic combustion.

Description

[Detailed description of the invention] Industrial applications The present invention is a hair curler that curls the hair.

The present invention relates to a catalytic combustion device that is used as a heating element for barbers such as roll brushes, soldering irons, stoves, etc.

Structure of conventional examples and their problems In general, this type of catalytic combustion device supplies a mixed gas consisting of a mixture of vaporized gas of liquefied butane or liquefied propane or a mixture thereof and air to a precious metal catalyst such as PT or Pd. It is oxidized and combusted using a noble metal catalyst, and the heat of combustion is used as a heating source.

Therefore, this type of device necessarily requires an air suction section. For example, in the case of butane gas, the theoretical air amount with the highest combustion efficiency is 30.9 times the gas amount, and this large amount of air An air suction unit that can suck the air is required.

By the way, the air suction section of a conventional device of this type is constructed as shown in FIG. That is, a nozzle 1 that spouts vaporized gas, an air suction section 2 corresponding to this nozzle 1,
The injector 6, which has a throat part 3, a diffuser part 4, and a gas feeder 6, when gas is ejected from the nozzle 1 in the direction of the arrow, sucks air in the direction of arrow B, and the throat part 3. When passing through the fuel gas and air section 4, it becomes a mixed gas of fuel gas and air.
'1 is supplied to the catalytic combustion section through a gas feeder 6 and 2.

This type of device automatically adjusts the supply of fuel gas according to the combustion state, and as shown in the figure, it is equipped with a member 7 that expands and contracts depending on the combustion state of the catalytic combustion section, that is, temperature changes. When the temperature rises, the expanded member 7 pushes down the nozzle 1 and operates to squeeze a valve portion (not shown).

However, such a structure for adjusting the amount of supplied gas has the disadvantage that the distance between the nozzle 1 and the injector 5 changes.
However, since the amount of suction air for the same amount of gas constantly changes, there is a drawback that stable combustion cannot be obtained. Further, the nozzle 1 requires a collar part 7 and a collar part 9 against which the spring 8 is applied, and there is a problem in that the space needs to be expanded in terms of construction.

OBJECTS OF THE INVENTION The present invention takes into account the problems of the prior art and provides a catalytic combustion device which provides a stable 128-gas-air mixture supply and has a more space-saving configuration. be.

Structure of the Invention In order to achieve the above-mentioned object, the present invention C1: A catalytic combustion device that detects the combustion heat of a catalyst part and slides a nozzle to adjust the gas flow.Y-1 Gas is supplied to the tip of the nozzle. The pipes are connected so that the nozzle and the gas supply pipe slide together, and a member for heat-sensitive sliding is connected to the gas supply pipe so that it is close to the nozzle tip of the gas supply pipe k(vj With the configuration in which the air intake L is formed at the position, the position of the nozzle and the air intake L does not change when adjusting the gas flow rate by moving the nozzle, making it stable.
Air can be taken in and good catalytic combustion can be achieved.

DESCRIPTION OF EMBODIMENTS Part of the present invention JM
This will be explained based on Figure 3.

In the figure, numeral 10 indicates a hair curler, which has a fuel tank (not shown), and a vaporizing chamber 11 connected to the fuel tank. A sealing cylinder 12 is slidably fitted into the vaporization chamber 11, and a valve seat 13 is provided at the end of the sealing cylinder 12 on the side of the vaporization chamber 11, and the other end is sealed. Operation lever 14 in the mid-abdomen
A protrusion 15 is provided with which the two engage. Reference numeral 16 denotes a nozzle, which is provided to penetrate the sealing cylinder 12 and the valve seat 13 and to be slidable in the axial direction. This nozzle 16 has a gas passage 18 having a gas inflow port 17 located in the sealed cylinder 12, and passes through the valve seat 13 and connects the sealed cylinder 12 with the 7 end.
The inner part has a seal part number 19.20.

A gas supply pipe 21 is fitted and connected to the tip of the nozzle 16, and an air intake port 22 is formed in the side of the gas supply pipe 21 close to the tip of the nozzle 16. The air intake port 22 is connected to the nozzle 1 as shown in FIG.
The tip of the nozzle 16 has a tapered shape, and the inner surface 23 on the side opposite to the nozzle 16 is tapered so that the inner side of the tube is further away from the nozzle 16 in order to improve air suction efficiency. It has −G.

The gas supply pipe 21C; ↓ is connected to the outer pipe 24 at the tip. This outer tube 24 is made of a material having a large coefficient of thermal expansion, and its end on the nozzle 16 side is fixed to a fixed part. The gas supply pipe 21 and the outer pipe 24 have a portion corresponding to the catalyst 25 and a gas supply hole ('j' not shown), and the outer periphery of the catalyst 25 has a heat transfer pipe 26, a hair wrap 411 member 27 (
i? It is a provision.

In the above configuration, the fuel gas (
The gas is ejected from the main nozzle 16 and mixed with the air sucked in from the gas supply pipe 21 through the air intake l] 22, which is then supplied to the catalyst 25 through the gas supply pipe 21. 7L is ignited by the ignition heater to increase catalyst combustion. starts, and the hair wrapping section 27 is heated to a predetermined temperature.

If catalytic combustion becomes excessive here, the outer tube 2
4 extends to the left, and the gas supply pipe 21 connected to this ft moves to the right in the drawing.

(, 7) Therefore, the nozzle 16 connected to this waste supply pipe 21 also slides to the right, narrowing the gas flow section of the valve seat 13 and automatically restricting the waste supply.

In the above operation, the air intake port 22 has a fixed positional relationship with the nozzle 16, so the amount of air intake does not change due to movement of the nozzle 16, unlike in the conventional case.
Stable catalytic combustion can be performed.

Note that the air intake port 22 is connected to the ejection port 16' of the nozzle 16 in order to effectively mix air and fuel gas for catalytic combustion.
There is a close relationship between the jet nozzle 16' and
The diameter of the gas supply pipe 21 is 4oμ to 70μ, and the inner diameter of the gas supply pipe 21 is 2m.
In this case, the length β of the air intake port 22 is 1.0 to 4.0 cm, the width is 1.2 to 15 cm, and the fuel gas amount is 16 to 50 cm.
The mixing ratio (excess air ratio) of fuel gas and air in the jetting of c/min is set to a state that allows catalytic combustion to start quickly (startup is fast) and to perform combustion efficiently.

For example, in the case of butane gas, the fuel gas concentration is 3.13
It is said that a mixing ratio of 30.9 times the amount of air (%) is good for efficiency, but in order to start catalytic combustion quickly, the gas concentration should be between 346% and 3.96%. can.

If the length of the air intake port 22 is too long, too much air will be sucked in and the gas concentration will be too thin, making it difficult for combustion to start.
Furthermore, since the gas emitted from the ejection port 16' of the nozzle 16 immediately spreads in all directions, there is a possibility that the gas exits from the air intake port 22 in the opposite direction. 2
If the length is set to 2, this problem will not occur.

Furthermore, since the inner surface 23 of the air intake port 22 on the side opposite to the nozzle 16 is tapered, there is no turbulence in the air flow, good suction efficiency, and good air mixing.

Effects of the Invention As is clear from the description of the above embodiments, according to the present invention, the gas supply pipe is provided with an air intake port, and the gas supply pipe and the nozzle move together to control the gas flow rate. Therefore, the positional relationship between the nozzle and the air intake port is constant, the intake air amount does not change during the above control, and there is no need to provide a shroud, nozzle heating spring, or other flanges, so the configuration space is saved. This has the advantage that it can be made small.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of a main part of a conventional catalytic combustion device, FIG. 2 is a sectional view of a catalytic combustion device of the present invention, and FIG. 3 is a sectional view of the main part. 11... Vaporization chamber, 12... Sealed cylinder, 13...
Valve seat, 16...nozzle, 21...-gas supply pipe, 2
2... Air intake port, 23... Inner surface, 24... Outer pipe, 25... Catalyst, 27. Hair wrapper member.

Claims (1)

[Scope of Claims] 0) A nozzle, a gas supply pipe connected to the tip of the nozzle, a member connected to the gas supply pipe that expands and contracts with temperature changes, and a catalyst to which gas is supplied through the gas supply pipe. A catalytic combustion device comprising: a gas flow rate control mechanism that controls a gas flow rate by a nozzle that slides together with the gas supply pipe; and an air intake port provided in a position close to a nozzle tip of the gas supply pipe. (2) The catalytic combustion device according to claim 1, wherein the air intake port has a tapered surface on the opposite side from the nozzle so that the distance gradually increases inwardly from the nozzle tip.