JPH08342A - Protable hair drier - Google Patents

Abstract

PURPOSE:To provide a safe portable hair drier, which will not generate a flame and is not limited in the operating direction. CONSTITUTION:After flame combustion is started, an air blowing part 16 is operated, and when a catalyst bed 20a reaches the catalyst combustible temperature, the excess air ratio of mixed gas at a mixing part 17 is heightened to shift flame combustion to catalyst combustion only to provide a portable hair drier which is safe and convenient for use.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a compact and easy-to-use cordless hair dryer which uses catalytic combustion of liquefied petroleum gas such as butane gas as a heat source.

[0002]

[Prior art]
Conventionally, in a hot-air fan that burns gas fuel or vaporized liquid fuel and takes out exhaust gas as hot air by exchanging heat with a heat exchanger, regardless of whether it is gas fuel or petroleum fuel, a flame is formed on the flame vent plate. It is in the form of burning.

Therefore, in order to form a flame, a combustion chamber having a space matching the flame is required. In other words, the unreasonable compaction may cause incomplete combustion and may discharge carbon monoxide and unburned hydrocarbons. Therefore, a portable hair dryer having a structure as shown in FIG. 8 has been devised. In FIG. 8, 1 is a blower, 2 is a wind tunnel, 3 is a combustor, and 4 is a piezoelectric igniter.
The combustor 3 is provided with a cover 5. A fuel inlet 6 is provided at the rear end of the combustor 3, a fuel air mixer 7 is provided at the inlet side of the fuel inlet 6, and a catalyst layer 8 is provided at the outlet end of the combustor 3. Fuel-air mixer 7 in combustor 3
The piezoelectric igniter 4 is arranged between the catalyst layer 8 and the catalyst layer 8.
The piezoelectric igniter 4 is connected to the ignition switch 10.

In the combustor 3, a fuel gas such as liquefied petroleum gas injected from the fuel inlet 6 and a part of the blast air blown by the blower 1 are mixed by the mixer 7 to burn the mixed gas. . That is, this mixed gas is used by the piezoelectric igniter 4
It is ignited by and burns. The burning mixed gas is mixed with the air blown by the blower 1 through the catalyst layer 8 and the outside of the combustion chamber in which the combustor 3 is installed,
It is discharged from the discharge port 9 attached to the outlet of the wind tunnel 2. At this time, when the combustion gas passes through the catalyst layer 8, the unburned gas is completely combusted and the amount of carbon monoxide / hydrocarbon becomes extremely small.

[0005]

The hair dryer having the above-mentioned conventional structure has the following problems. First, since flame combustion is adopted, the flame may be emitted from the outlet 9, which is dangerous. Secondly, the combustion direction is limited, and it is not suitable for use in various directions.

SUMMARY OF THE INVENTION The present invention is intended to solve the problems of the conventional structure, and it is a first object of the present invention to provide a safe and portable hair dryer that does not generate a flame and has no limitation in the direction of use. Has an aim.

A second object of the present invention is to provide a portable hair dryer capable of detecting the temperature of the catalyst and automatically operating the blower to safely and surely shift to the catalytic combustion.

A third object of the present invention is to provide a portable hair dryer capable of controlling the air volume of the blower according to the temperature of the catalyst and maintaining stable catalytic combustion.

Further, a part of the wind of the blower is mixed with the mixed gas to be supplied to the catalyst, the excess air ratio of the mixed gas is adjusted to keep the temperature of the catalyst moderate, and the safe and durable portable hair is provided. The fourth purpose is to provide a dryer.

[0010]

A first means for achieving the first object of the present invention is to provide a gas cylinder for containing a fuel gas and a fuel gas supplied from the gas cylinder in an opening area of a control valve. A nozzle that ejects while adjusting the flow rate by adjusting, a blowing unit that blows air from the rear of the nozzle, a mixing unit that mixes air and fuel gas, and a combustion chamber that burns a mixed gas of air and fuel gas. A portable hair dryer having a catalytic combustion unit provided at an outlet of combustion gas.

The second means of the present invention for attaining the second object is, in particular, to provide a bimetal switch in the vicinity of the catalyst combustion section, detect the temperature rise of the catalyst layer due to heating of the combustion gas, and blow section. It is a portable hair dryer that operates.

A third means of the present invention for achieving the third object is to provide a positive temperature coefficient thermistor in the vicinity of the catalytic combustion section, detect the temperature of the catalyst layer due to heating of the combustion gas, and detect the temperature of the blowing section. This is a portable hair dryer that controls the air flow rate.

The fourth means of the present invention for achieving the fourth object is, in particular, that a substantially conical guide cylinder is provided at the outlet of the combustion chamber, and catalytic combustion is provided at the guide cylinder opening opposite to the combustion chamber. And a plurality of air intakes are provided on the side wall of the guide cylinder to provide a portable hair dryer.

[0014]

The first means of the present invention is to operate the blower section after the start of flame combustion to increase the excess air ratio of the mixed gas after the catalyst layer reaches the temperature at which catalyst combustion is possible, so that the combustion from flame combustion to catalyst combustion takes place. It works as a safe and easy-to-use portable hair dryer.

In the second means of the present invention, a bimetal switch provided in the vicinity of the catalytic combustion section detects a temperature rise of the catalytic layer due to heating of the combustion gas, and the temperature of the catalytic layer becomes a temperature suitable for catalytic combustion. After that, it acts so as to operate the air blower, and realizes a portable hair dryer that can safely and surely shift to catalytic combustion.

A third means of the present invention is that a positive temperature coefficient thermistor provided in the vicinity of the catalytic combustion section serves as a resistance value according to the temperature of the catalyst layer due to heating of the combustion gas to control the blowing rate of the blowing section. Thus, the present invention realizes a portable hair dryer in which the temperature of the catalyst is maintained at an appropriate temperature and stable catalyst combustion can be maintained.

In the fourth means of the present invention, an induction cylinder provided at the outlet of the combustion chamber is provided with a plurality of air intakes, and the air ratio of the mixed gas is controlled according to the amount of air blown so that the catalyst layer of the catalyst layer can be controlled. The present invention realizes a safe and portable hair dryer that can maintain the temperature at an appropriate temperature, is excellent in durability, and does not have an abnormally high temperature of hot air.

[0018]

EXAMPLES Examples of the first means of the present invention will be described below. FIG. 1 is a sectional view showing the overall structure of this embodiment. The housing 11 of the portable hair dryer is made of metal having excellent heat resistance and includes the following parts. Reference numeral 12 is a gas cylinder that contains a fuel gas such as propane and butane, which is a liquefied petroleum gas, and is fixedly or detachably provided to the main body 11. A nozzle 13 is arranged at the outlet of the supply path of the gas supplied from the gas cylinder 12. A control valve 14 is provided between the gas cylinder 12 and the nozzle 13. As shown in FIG. 2, the control valve 14 is composed of a control lever 14a, a throttle rod 14b, a seal ring 14c, and a throttle port 14d. When the user turns the control lever 14a, the supply amount of fuel gas is increased. Can be controlled. That is, when the control lever 14a is rotated, the diaphragm rod 14b moves, and the aperture area of the diaphragm aperture 14d changes.

Further, behind the nozzle 13, there is provided an air blowing section 16 for supplying air toward the hot air outlet 15. The blower unit 16 includes a fan 16a and a fan driving motor 16b. The fuel gas jetting small hole 13a provided at the tip of the nozzle 13 injects the fuel gas, which is gasified by the liquefied gas in the gas cylinder 12 in the relay pipe 21, into the mixing section 17 at an appropriate speed. Mixing section 17
Is a portion for mixing gas and air into a mixed gas of a fixed ratio. The combustion chamber 19 is installed in association with the fuel gas ejected from the small holes 13a.
The tip of the nozzle 13 is arranged in a mixing unit 17 that mixes the air blown by the blower unit 16 with the fuel gas to form a mixed gas. The mixing section 17 is connected to a combustion chamber 19 that burns the mixed gas. Combustion chamber 1
An ignition part 18 for igniting the mixed gas is provided in the vicinity of 9. The ignition part 18 is composed of a piezoelectric device 18a and an electrode 18b. The outer peripheral portion of the combustion chamber 19 corresponds to the other electrode with respect to the electrode 18b. The combustion chamber 19 is connected to the catalytic combustion unit 20, and a catalyst layer 20a is provided at the tip of the catalytic combustion unit 20. As shown in FIG. 2, the catalyst combustion unit 20 includes a catalyst layer 20a and a catalyst layer 20a.
The catalyst layer case 20b for housing the catalyst layer 20a and the metal fitting 20c for fixing the catalyst layer 20a. Catalyst layer 20a
Is a carrier in which a porous ceramic or metal such as a honeycomb or a foam is used as a carrier, and platinum, palladium or the like is supported.

Reference numeral 22 denotes a storage battery that supplies power to the blower unit 16 and supplies power to the fan driving motor 16b via the operation switch 23.

The operation of this embodiment will be described below. When the user rotates the control lever 14a, the fuel gas flows out of the gas cylinder 12 and is ejected from the small hole 13a of the nozzle 13 through the relay pipe 21. The jetted fuel gas entrains ambient air and flows into the mixing section 17. The mixed gas mixed with air in the mixing section 17 flows into the combustion chamber 19. When the piezoelectric device 18a is operated here, spark discharge is generated between the electrode 18b and the outer peripheral portion of the combustion chamber 19, and flame combustion is started inside the combustion chamber 19.
By this flame combustion, the catalyst layer 20a of the catalyst combustion unit 20 provided at the outlet of the combustion gas is heated, and the catalyst layer 20a
The temperature rises and instantly reaches over 200 ° C. When the operation switch 23 is turned on in this state, the drive motor 16
b rotates and the fan 16a starts blowing air. Fan 1
The amount of air flowing into the mixing section 17 is increased by the blown air of 6a, and the excess air ratio to the mixed gas is increased. As a result, flame combustion in the combustion chamber 19 cannot be maintained, and the high temperature mixed gas with the flame extinguished becomes the catalyst layer 2
0a. At this time, the temperature of the catalyst layer 20a is 20
Since the temperature is 0 ° C or higher, flame combustion shifts to catalytic combustion. This combustion gas is mixed with the wind from the blower unit 16 and is blown out from the warm air blowing port 15.

When the operation is stopped, the control lever 14a is turned in the opposite direction to close the control valve 14 and the operation switch 23 is turned off.
Then the blast is stopped.

As described above, according to the present embodiment, the blower section is operated after the start of flame combustion, and after the catalyst layer reaches the temperature at which catalyst combustion is possible, the excess air ratio of the mixed gas is made thinner than the range where flame combustion is possible. Since the flame can be extinguished and only catalytic combustion can be performed, the flame does not come out from the hot air outlet 15 and it is safe. Further, since there is no limitation on the burning direction, it can be used in various directions.

Next, an embodiment of the second means of the present invention will be described with reference to FIGS. The overall structure of this embodiment is the same as that described with reference to FIG. 24 shown in FIGS. 3 and 4 is a catalyst layer case 20.
It is a bimetal switch provided in b. Storage battery 2
The second power source is connected to the fan driving motor 16b via the switch 24.

The operation of this embodiment will be described below. By rotating the control lever 14a, flame combustion is started in the combustion chamber 19 as in the first embodiment. The heat energy generated by the flame combustion heats the catalyst layer 20a of the catalyst combustion unit 20 provided at the outlet of the combustion gas.
As a result, due to heat conduction, the temperature of the bimetal attached to the catalyst layer case 20b rises and bends. In this way, when the temperature of the catalyst layer 20a becomes 200 ° C. or higher, the contact of the bimetal switch 24 is closed and the fan 1
Power from the storage battery 22 is supplied to 6a. In this way, the fan 16a starts rotating, and the blower unit 16 starts blowing air. When this blowing is started, the amount of air flowing into the mixing section 17 increases, the excess air ratio increases, and flame combustion cannot be maintained, resulting in a flameless combustion state in which the flame disappears. The mixed gas in the flameless combustion state is the catalyst layer 20.
When it is supplied to a, the temperature of the catalyst layer 20a becomes 200 ° C. or higher, so that it immediately shifts to catalytic combustion. The combustion gas generated by this catalytic combustion is mixed with the wind from the blower unit 16 and blown out from the warm air blowing port 15.

When the operation is stopped, the control lever 14a is rotated in the opposite direction to close the control valve 14 as in the above embodiment. When the control valve 14a is closed, the supply of mixed gas is stopped. As a result, the temperature of the catalyst layer 20a is lowered and the temperature of the bimetal attached to the catalyst layer case 20b is lowered, and the original shape is restored. In this way, the contact of the switch 24 is opened, the power supply to the drive motor 16b is stopped, and the air blowing is automatically stopped.

As described above, according to the present embodiment, the bimetal is provided in the vicinity of the catalytic combustion unit 20, and the temperature rise of the catalyst layer 20a due to the heating of the combustion gas is detected to operate the blower unit. Therefore, it is possible to automatically and safely shift to catalytic combustion.

Next, an embodiment of the third means of the present invention will be described with reference to FIG. 25 is a catalyst layer case 20b
Is a positive temperature coefficient thermistor. The power source of the storage battery 22 is
It is connected to the fan driving motor 16b through the positive temperature coefficient thermistor switch 25. In other words, the current value supplied to the fan driving motor 16b is controlled by the resistance value of the positive temperature coefficient thermistor 25 to change the air flow rate.

The operation of this embodiment will be described below. By rotating the control lever 14a, flame combustion is started in the combustion chamber 19. The heat energy generated by the flame combustion heats the catalyst layer 20a of the catalyst combustion unit 20 provided at the outlet of the combustion gas. By this heat conduction, the catalyst layer case 2
The temperature of the positive temperature coefficient thermistor 25 attached to 0b also rises. As the temperature of the positive temperature coefficient thermistor 25 rises, this resistance value decreases and the current supplied to the fan driving motor 16b increases. For this reason,
The amount of air blown from the air blower 16 also increases. When the temperature of the catalyst layer 20a becomes 200 ° C. or higher, the amount of blown air increases, and as a result, the combustion in the combustion chamber 19 changes to flameless combustion. Thus, catalytic combustion is performed in the catalyst layer 20a in the same manner as in each of the above-described embodiments. The combustion gas generated by this catalytic combustion is mixed with the wind from the blower unit 16 and blown out from the warm air blowing port 15.

When the temperature of the catalyst layer 20a further rises and the temperature of the hot air rises, the PTC thermistor 25 is activated.
It operates so as to lower the temperature of a. That is, the resistance value of the positive temperature coefficient thermistor 25 is further reduced, and the current supplied to the fan driving motor 16b is increased.
The amount of air blown by the air blower 16 is increased, so that the heat of the catalyst layer 20a is taken away, and the catalytic combustion heat energy and the amount of air blow are balanced. In this way, the warm air of an appropriate temperature is stably blown out.

When the operation is stopped, the control lever 14a is rotated in the opposite direction to close the control valve 14 as in the above-described embodiments.
The supply of the mixed gas is stopped. When the supply of the mixed gas is stopped, the temperature of the catalyst layer 20a is lowered, the resistance value of the positive temperature coefficient thermistor 25 is increased, the current supplied to the fan driving motor 16b is decreased, and the blowing is automatically stopped. It is what is done.

As described above, according to this embodiment, the positive temperature coefficient thermistor 25 is provided in the vicinity of the catalytic combustion unit 20, and the temperature of the catalyst layer 20a due to the heating of the combustion gas is detected to detect the temperature of the blower unit 16.
The temperature of the catalyst can be maintained at an appropriate temperature and stable catalyst combustion can be maintained because the amount of airflow is controlled.

Next, an embodiment of the fourth means of the present invention will be described with reference to FIGS. In the present embodiment, a substantially conical guide tube 26 having a plurality of air intakes 26a is provided at the outlet of the combustion chamber 19. Other configurations are similar to those of the third embodiment of the present invention.

The operation of this embodiment will be described below. The process in which the combustion in the combustion chamber 19 shifts from the flame combustion to the flameless combustion and the catalyst combustion is performed in the catalyst layer 20a is the same as in the above-described embodiment. The combustion gas generated by the catalytic combustion is mixed with the air blown from the air blower 16 and blown out from the warm air blowout port 15. At this time, if the temperature of the catalyst layer 20a further rises and the temperature of the warm air rises, the resistance value of the positive temperature coefficient thermistor 25 decreases, and the amount of air blown from the air blower 16 increases. A part of this blast is the guide tube 2
The air is introduced into the guide cylinder 26 from the air intake port 26a provided on the surface of the nozzle 6. Therefore, the combustion chamber 19
The mixed gas sent from the air is mixed with the blast air and further diluted. Therefore, the mixed gas supplied to the catalyst layer 20a has a lower concentration and the catalyst combustion amount is reduced. In this way, the temperature of the catalyst layer 20a also drops. Eventually, the catalytic combustion heat energy and the amount of blown air will be balanced, and hot air of appropriate temperature will be stably blown out.

As described above, according to the present embodiment, the air ratio of the mixed gas can be controlled according to the blowing amount, the temperature of the catalyst layer can be maintained at an appropriate temperature, and the durability is excellent and the warm air It realizes a safe and portable hair dryer that does not have an abnormally high temperature.

[0036]

The first means of the present invention is a gas cylinder containing a fuel gas, and a nozzle for ejecting the fuel gas supplied from the gas cylinder while adjusting the flow rate by adjusting the opening area of the control valve. An air blower that blows air from the rear of the nozzle, a mixer that mixes air and fuel gas, a combustion chamber that burns a mixed gas of air and fuel gas, and a catalyst burner that is provided at the outlet of the combustion gas. As a configuration provided, it realizes a safe and portable hair dryer that does not generate flames and has no restrictions on the direction of use.

The second means of the present invention is to detect the temperature of the catalyst by providing a bimetal switch in the vicinity of the catalyst combustion part and detecting the temperature rise of the catalyst layer due to the heating of the combustion gas to operate the blower part. To automatically operate the blower,
It is intended to realize a portable hair dryer that can safely and surely shift to catalytic combustion.

The third means of the present invention is to provide a positive temperature coefficient thermistor in the vicinity of the catalyst combustion section, detect the temperature of the catalyst layer due to heating of the combustion gas, and control the amount of air blown by the air blower. The present invention realizes a portable hair dryer capable of adjusting the air volume of a blower to stably maintain catalytic combustion.

A fourth means of the present invention is to provide a guide tube having a substantially conical shape at the outlet of the combustion chamber, and to arrange a catalytic combustion part at the opening of the guide tube on the side opposite to the combustion chamber. With a structure with multiple air intakes, part of the air from the blower is mixed with the mixed gas that supplies the catalyst, and the excess air ratio of the mixed gas is adjusted to maintain the catalyst temperature at an appropriate level, which is safe and durable. It realizes an excellent portable hair dryer.

[Brief description of drawings]

FIG. 1 is a sectional view of a portable hair dryer according to an embodiment of the first means of the present invention.

FIG. 2 is a sectional view of the main part of the portable hair dryer.

FIG. 3 is a sectional view of a portable hair dryer according to an embodiment of the second means of the present invention.

FIG. 4 is a sectional view of the main part of the portable hair dryer.

FIG. 5 is a sectional view of a main part of a portable hair dryer according to an embodiment of the third means of the present invention.

FIG. 6 is a sectional view of a portable hair dryer according to an embodiment of the fourth means of the present invention.

FIG. 7 is a sectional view of a main part of the portable hair dryer.

FIG. 8 is a sectional view of a conventional portable hair dryer.

[Explanation of symbols]

 12 Gas cylinder 13 Nozzle 14 Control valve 16 Air blower 17 Mixer 19 Combustion chamber 20 Catalyst burner 20a Catalyst layer 24 Bimetal switch 25 Positive temperature coefficient thermistor 26 Induction cylinder 26a Air intake port

Claims (4)

[Claims] 1. A gas cylinder containing a fuel gas, a nozzle for ejecting the fuel gas supplied from the gas cylinder while adjusting a flow rate by adjusting an opening area of a control valve, and air is blown from the rear of the nozzle. A portable hair dryer including a blower unit, a mixing unit that mixes air and fuel gas, a combustion chamber that burns a mixed gas of air and fuel gas, and a catalytic combustion unit that is provided at the outlet of the combustion gas. 2. The portable hair dryer according to claim 1, wherein a bimetal switch is provided in the vicinity of the catalytic combustion section, and the blower section is operated by detecting an increase in temperature of the catalytic layer due to heating of combustion gas. 3. The portable hair dryer according to claim 1, wherein a positive temperature coefficient thermistor is provided in the vicinity of the catalytic combustion section, and the temperature of the catalytic layer due to the heating of the combustion gas is detected to control the blowing rate of the blowing section. 4. A substantially conical guide cylinder is provided at the outlet of the combustion chamber, a catalytic combustion section is arranged at the guide cylinder opening on the opposite side of the combustion chamber, and a plurality of air intake ports are provided on the side wall of the guide cylinder. The portable hair dryer according to claim 1 or 3.