JPS62268913A - Portable hot air blower - Google Patents

Abstract

PURPOSE:To obtain enough blow of hot air by a small and portable hot air blower, by compositing a combustion means by carrying a catalyst to a ceramic body having a number of air holes, and by providing a mixing chamber to mix fuel gas with air. CONSTITUTION:A ceramic catalyst 7 is provided to a combustion means 2. The ceramic catalyst 7 is composed of a honeycomb ceramic body having a number of air holes 6, by which a catalyst such as platinum is carried. When a switch 14 is slid one step, gas is fed to a gas nozzle 17 from a tank 5 through a gas feed pipe 36, and is injected. While an ignition means 3 is red-heated on a battery 4 through a closed switch contacting point 15. This state is continued for about 10sec. After that when the switch 14 is slid another step, the gas is injected from the gas nozzle 17 in succession, while a motor 18 is energized on the battery 4 through the switch contacting point 15, and a fan 19 is rotated. The gas and part of blast air fed by the fan 19 are mixed in a mixing chamber 8, and a mixed gas causes catalytic combustion while it is passes through the air holes 6 of a ceramic catalyst 7. The blast air is heated by the combustion means 2, turned into hot air, and is discharged from a discharge nozzle 29.

Description

[Detailed Description of the Invention] [Technical Field] The present invention provides a portable air heater that uses a gas heat source and is suitable for drying hair, drying clothes, or drying the body hair of pets such as dogs and cats. Regarding.

[Background technology]

Portable hot air heaters have a variety of uses, such as drying hair and clothing at beaches, camping sites, etc., and drying body hair in vents. When a battery is used as a heat source for a portable air heater, the amount of heat that can be extracted from the battery is very small if the battery is of a portable weight and size. Therefore, it is inappropriate to use batteries as a heat source for portable air heaters. Therefore, liquefied petroleum gas was discovered as a material that is portable and has enough heat to produce warm air with a portable device.In fact, it is now possible to obtain warm air by blowing liquefied petroleum gas while burning it with flame. portable hair dryer (Jikko Sho 45-283)
No. 31) has been devised. This portable dryer is shown in FIG. As you can see in the picture, this portable dryer is
A wind tunnel 51 is formed in front of the air blowing means 50 in the air blowing direction, and a combustion chamber 52 is provided on the lower surface side of the wind tunnel 51. A gas burner 53 is arranged within the combustion chamber 52 . The gas burner 53 flame-combusts the fuel gas in the fuel gas tank 54, and the flame heats the upper surface of the combustion chamber 52 or the lower surface of the wind tunnel 51. The air sent by the blower device 50 is heated from the lower surface of the wind tunnel 51 and forced to blow out from the tip of the wind tunnel 51. Air is supplied to the gas burner 51 through an intake hole 55 on the lower surface of the combustion chamber 52. In the figure, 56 is a gas burner 53
57 is a battery that serves as a power source for the blowing means 50 and the ignition heater 56; 58 is a blowing means 50;
and a switch section that turns on and off the ignition heater 56, and the switch section 58 includes a gas supply control valve.

However, since this portable hair dryer burns with flame, it is easily extinguished by the wind sent from the blower, and toxic exhaust gas is likely to be emitted due to incomplete combustion.Furthermore, it is difficult to control the temperature, so it is harmful to hair, etc. There are drawbacks such as being dangerous.

In order to overcome the drawbacks of this portable dryer, the inventor
I did a lot of research. As a result, we have developed a portable air warmer equipped with a catalytic combustion method that is difficult to dissipate in the wind, generates little toxic exhaust gas, and is relatively easy to control temperature. However, when using alumina or other fibers impregnated with catalysts such as platinum, if the air is blown too strongly, the fibers will be blown away and fine fiber powder will be emitted along with the exhaust gas, causing harm to the human body. I found out that it will happen.

[Purpose of the invention]

This invention was developed in light of these circumstances. It is small and portable, can obtain sufficient hot air, generates little toxic exhaust gas, and prevents combustion from being hindered by the wind. The aim is to provide a safe portable air heater that is less likely to be exposed to heat.

[Disclosure of the invention]

In order to achieve the above-mentioned objects, the present invention provides an air blowing means, a catalytic combustion type combustion means for heating the air sent by the air blowing means, an ignition means for igniting the combustion means, and a blowing means for heating the air sent by the air blowing means. A portable hot air heater is provided with a power supply for supplying power to the combustion means and the ignition means, and a fuel gas tank for supplying fuel gas to the combustion means, wherein the combustion means has a catalyst supported on a ceramic having a large number of ventilation holes. The gist of the portable air warmer is that it is equipped with a fuel gas and air mixing chamber at its inlet.

The present invention will be explained in detail below.

1 to 3 show a portable air heater according to the present invention. As shown in the figure, the main body 9 of this portable air warmer includes a wind tunnel section 10 and a handle section 11. The main body 9 is made of a highly heat-resistant molded product. Handle part 11
A fuel gas tank 5 and a battery storage chamber 12 are provided inside, and a swiftlet 14 is provided on the wall. The fuel gas tank 5 has a main charge port 20<3,
A replenishment gas cylinder 21 is connected here to supply fuel gas such as liquefied petroleum gas.

The storage chamber 12 includes a child terminal 22 and a terminal 23, and is configured to house a battery 4 as a power source.

A battery 1i13 that can be opened and closed is provided, and the battery 4 can be replaced from here. The switch 14 has a switch contact 1 that operates in conjunction with the switch 14.
5 and a gas on-off valve 16 are connected. Inside the wind tunnel section 10, a blower means (blower mechanism) 1. Combustion means (combustion part)
2 and an ignition means (ignition device) 3 are provided.

The air blowing means (air blowing unit) 1 includes a motor 18 provided with a fan 19, and a rectifying blade 24 provided around the motor 18. Air is sucked in and blown through a suction port 25 provided at the rear end of the wind tunnel section 10. The motor 18 is electrically connected directly to the child terminal 22 and electrically connected to one terminal 23 via the switch contact 15, so that the battery 4 supplies power to the motor 18. It has become. The combustion means 2 includes a ceramic catalyst 7 and a cover 26, and is fixed to the wind tunnel section 10 by a net 28. The ceramic catalyst 7 is a honeycomb-shaped ceramic body having a large number of ventilation holes 6 and supporting a catalyst such as platinum thereon. The cover 26 is
It is cylindrical and has a diameter that becomes smaller towards the rear, and a narrow inlet 27 is provided at the rear end. It is fixed to the rear end of the catalyst 7 and forms a mixing chamber 8 at its inlet. By forming the inlet 27 narrowly, only a part of the blown air generated by the blowing means 1 can be taken into the mixing chamber 8.
The amount of air flowing into the mixing chamber 8 is determined by the opening area of the mixing chamber 8. A gas nozzle 17 at the tip of a gas conduit 36 introduced from the fuel gas tank 5 via the gas on-off valve 16 opens into the inlet 27 . An ignition means (ignition heater) 3 is disposed within the mixing chamber 8 , and this ignition means 3 is directly electrically connected to the child terminal 22 and is electrically connected to one terminal 23 via the switch contact 15 . The battery 4 is designed to supply power to the ignition means 3. The combustion means 2 mixes a fuel gas such as liquefied petroleum gas injected from the gas nozzle 17 and a part of the blown air generated by the blowing means 1 in a mixing chamber 8, and this mixed gas is passed through the catalyst 7. A catalytic combustion reaction occurs while passing through the pores 6. The switch 14 is designed to slide in two steps. When the switch 14 is slid one step in the direction of the arrow at the position shown in the figure, the gas on-off valve 16 becomes open and the contact of the switch contact 15 on the ignition heater 3 side opens. ON
It is supposed to be in a state. If it is slid one more step in the direction of the arrow, the gas on-off valve 16 remains open, the contact on the ignition means 3 side of the switch contact 15 is turned off, and the contact on the motor 18 side is turned on. There is. When switch 14 is returned to its original position, gas release valve 1
6 is closed, the contacts of the switch contact 15 on the ignition means 3 side and on the motor 18 side are turned off. A discharge nozzle 2 is installed at the distal end of the wind tunnel section 10.
9 is attached. A discharge port grid 30 is provided inside the discharge nozzle 29 to prevent fingers or the like from being inserted thereinto.

This portable air warmer operates as follows.

That is, first, the switch 14 is slid one step in the direction of the arrow. Gas is then sent from the fuel gas tank 5 through the gas conduit 36 to the gas nozzle 17, from which it is injected. On the other hand, the battery 4 supplies power to the ignition means 3 through the switch contact 15, causing the ignition means 3 to become red hot.

At the start of this combustion, only gas is supplied, and the ignition means 3 starts combustion with a fast rise. This state is about 1
After holding the switch for 0 seconds, slide the switch 14 one more step in the direction of the arrow. Then, gas will continue to be injected from the gas nozzle 17, and the battery 4 will
Power is supplied to the motor 18 through the switch contact 15, and the fan 19 rotates. Then, the gas and a portion of the air blown by the fan 19 are mixed in the mixing chamber 8, and while this mixed gas passes through the vent hole 6 of the catalyst 7, a catalytic combustion reaction occurs. The size of the inlet 27 may be determined so that the gas is mixed with the blown air at an appropriate concentration (approximately 1%) when combustion is stable. The blown air is heated by the combustion means 2 to become hot air, which is discharged from the discharge nozzle 29.

2. The portable hot air heater according to the present invention is equipped with a combustion means in which a catalyst is supported on ceramic, and does not use fibers such as alumina. There is no risk of fine fiber powder being included in the exhaust gas. In addition, since it is configured as described above and uses a catalytic combustion type, it is small and portable, and it can also obtain sufficient warm air, making it difficult to dissipate in the wind and reducing the amount of poisonous exhaust gas. It's getting less.

FIG. 4(a), FIG. 5, FIG. 9(a), FIG. 10, and FIG. 11 each show another embodiment of the portable air warmer according to the present invention.

The portable hot air heater shown in FIG. The flow rate of the gas ejected from this pipe 31 is increased to generate a negative pressure, and this negative pressure is used to draw air into the mixing chamber 8. When this is done, air enters the mixing chamber 8 due to both the blowing pressure by the blowing means 1 and the Venturi effect, and the gas and air are mixed at a stable mixing ratio. There is an advantage that a constant amount of air is secured due to the Venturi effect even if the amount of calm air supplied by 1 changes.The other structure of this portable hot air heater is the same as that of the above embodiment, Common numbers indicate the same thing.

The portable hot air heater shown in FIG. 5 is provided with an air louver (Imm) 32 in close contact with the outer circumferential surface of the cover 26, and a mixture ratio adjustment lever 33 that pushes this adjustment means 32 (b) in FIG.
As shown in FIG. 1, it is provided on the wall of the wind tunnel section 10. As shown in FIG. 7, the adjusting means 32 has the shape of a plate rolled into a megaphone shape. It is made of elastic metal and always shrinks inward.
It has spring properties. Therefore, when the cover 26 is in close contact with the cover 26, as shown in FIG. 6(b), a force is applied to the cover 26 in a downward direction.

A protruding plate 32a having a groove 32b is provided at the end of the adjusting means 32 on the narrow diameter side. As shown in FIG. 8(C), the lever 33 has a piece-shaped rod 33b protruding from the lower surface of a plate 33a having a knurled upper surface.
A flange portion 33c is provided at the top of this rod 33b. As shown in FIG. 8 (al), an opening 10a having an E-shaped plane is provided at the position where the lever 33 is installed on the wall of the wind tunnel section 10. The bar 33b is disposed in the opening 10a such that the portion between the plate 33a and the flange 33c is inserted into the opening 10a.The tip of the rod 33b is inserted into the groove 32b of the adjusting means 32a. The rest of the structure of this portable air warmer is similar to that of the previous embodiment, and common numbers indicate the same items.

The adjusting means 32 and the lever 33 operate as follows. Normally, a force is applied to the lever 33 in the right direction in FIG. 8(a) due to the springiness of the adjusting means 32a in the contracting direction. When the lever 33 is located at the rightmost position X of the opening 10a, the adjusting means 32a is in the most contracted state, as shown in (bl) of FIG. The amount of air entering is the minimum.Then, the position of y,
2 and the lever 33 is pushed to the left against the springiness of the adjusting means 32, the area of the rear end opening of the adjusting means 32 becomes larger and the amount of air entering the mixing chamber 8 increases.

At position 2, it is in the maximum expanded state as shown in FIG. 6(a), and the amount of air entering the mixing chamber 8 is maximum. At each position of x, y, and z, move the lever 33 laterally to open the notch 10b that serves as a stop mechanism.
, 10c, and 10d, the lever 32 can be fixed by inserting the rod 33b.

This portable air heater can adjust the mixing ratio of gas and air by adjusting the amount of air entering the mixing chamber, making it easy to change the temperature of the hot air. This is very convenient because it allows you to Although this portable hot air heater is designed to allow the mixing ratio to be adjusted in three stages, it is possible to adjust the mixing ratio in more stages by increasing the number of notches in the stop mechanism. good.

The portable air heater shown in FIG. 9 (al) is placed in the mixing chamber 8 near the catalyst 7,
Diffusion Fi 34 is arranged. This diffusion plate 34 is made of foamed metal or the like and is porous. When such a diffusion plate 34 is provided, the gas injected from the gas nozzle 17 hits the diffusion plate 34 and is uniformly diffused.

Therefore, the effect that the heat distribution of the hot air becomes uniform can be obtained. The rest of the structure of this portable air warmer is similar to that of the previous embodiment, and common numbers indicate the same items.

Note that the diffusion plate may be a thin metal plate with a large number of fine holes formed on the entire surface thereof. In this case, since the gas tends to concentrate at the center of the diffusion plate, it is more effective to provide holes in a larger proportion at the periphery than at the center.

In the portable hot air heater shown in FIG. 10, the ignition means 3 of the mixing chamber 8 is provided close to the gas nozzle 17. In this way, the entire gas emitted from the gas nozzle 17 is transferred to the ignition means 3.
Therefore, less power is required to be input to the ignition means 3 to start combustion, and combustion starts quickly.

Furthermore, during normal combustion, the gas ejected from the gas nozzle 17 hits the ignition means 3 and is diffused, resulting in the effect of uniform combustion. The rest of the structure of this portable air warmer is similar to that of the previous embodiment, and common numbers indicate the same items.

In the portable air warmer shown in FIG. 11, a cushioning material 35 made of metal fiber is filled between the combustion means 2 and the wind tunnel section 10, so that the combustion means 2 is fixed. Therefore, the force applied to the combustion means 2 due to vibrations and impacts is alleviated. In addition, the buffer material 35 absorbs the heat of the combustion means 2 during combustion, and the combustion means 2 of the blown air generated by the blowing means 1
It also has the effect that the hot air coming out of the discharge nozzle 29 is prevented from having a biased wind temperature distribution with high temperature in the center and low temperature in the surrounding area.

In addition, in all of the above examples, the ceramic catalyst is equipped with a honeycomb-shaped ceramic, but it seems that other types of porous ceramics may be used as long as ceramics with vents are used. Good too.

〔Effect of the invention〕

A portable air heater according to the present invention includes: a blowing means; a catalytic combustion type combustion means for heating the air sent by the blowing means; an ignition means for igniting the combustion means; A portable hot air heater equipped with a power supply for supplying power to the means and a fuel gas tank for supplying fuel gas to the combustion means, wherein the combustion means is a ceramic having a large number of ventilation holes and carrying a catalyst thereon. In addition, the inlet is equipped with a mixing chamber for fuel gas and air, making it small and portable, as well as producing sufficient hot air.Moreover, it produces less toxic exhaust gas (and is less likely to be affected by wind). Combustion is not hindered (and is safe).

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of an embodiment of a portable air heater according to the present invention, FIG. 2 is a vertical cross-sectional view of a ceramic catalyst of the same embodiment, FIG. 3 is a perspective view of the same embodiment, and FIG. (a) of the figure is a longitudinal cross-sectional view of another embodiment of the portable hot air heater, ('b) of the same figure is a longitudinal cross-sectional view of the tube that causes the Venturi effect of the same embodiment, and (C1 of the figure is FIG. 5 is a longitudinal cross-sectional view of another embodiment of the portable air heater, FIGS. 6 (a) and (b) are operation explanatory diagrams of the same embodiment, and FIG. 7 is the same A perspective view of the adjustment means of the embodiment; FIG. 8 (al is a thousand-faced lever near the lever installation position in the wind tunnel section of the embodiment; FIG. 8) is a perspective view of the front part of the wind tunnel section of the embodiment; (C) of the same figure is a perspective view of the lever of the same embodiment,
FIG. 9(a) is a longitudinal sectional view of another embodiment of the portable air heater, FIG. 9(b) is a perspective view of the diffuser plate, and FIG. 10 is another embodiment of the portable air heater. FIG. 11 is a longitudinal sectional view of another embodiment of a portable hot air heater, and FIG. 12 is a longitudinal sectional view of a conventional portable dryer. 1...Blower means 2...Combustion means 3...Ignition means 4...Battery 5...Fuel gas tank 6...Vent hole 7...Ceramic catalyst 8...Mixing chamber agent Patent attorney Takehiko MatsukiFigure 1Figure 16Figure 7Figure 11Figure 12

Claims (1)

[Claims] (1) A blowing means, a catalytic combustion type combustion means for heating the air sent by the blowing means, an ignition means for igniting the combustion means, a power supply for supplying power to the blowing means and the ignition means, and a combustion means for igniting the combustion means; A portable hot air heater is equipped with a fuel gas tank for supplying fuel gas to the combustion means, and the combustion means is equipped with a catalyst supported on ceramic having a large number of ventilation holes, and the inlet of the combustion means includes: A portable air heater characterized by being provided with a mixing chamber for fuel gas and air.