JPH05137612A - Portable hair dryer - Google Patents

Abstract

PURPOSE:To provide the title dryer, in which a detecting part for combustion temperature can be simply composed, the detectable range thereof can be widely formed, and the state of combustion can stably be maintained. CONSTITUTION:A detecting part 11 for combustion temperature at a catalytic combustion part 10 is composed as follows, that is to say, for a pair of platelike heat-sensing members, each of which has a thermal expansion coefficient differing each other, the one end of each of the members is joined each other. The other end of the one of the members is fixed on a dryer main body 2 and the other end of the other of the members is mechanically shifted by heating due to the combustion of the catalytic combustion part 10 above-mentioned. In relation thereto, a control part, which controls the amount of a fuel gas supplied from a gas bottle by controlling a control valve 15 for a nozzle 4 corresponding to the detection by the detecting part 11, is composed of a valve- opening and closing mechanism 14. The mechanism 14 regulates the opening of a throttling port for the control valve 15 by the operation of a lever 32, which is held at a holding piece 4a for the nozzle 4 and transmits a mechanical movement caused to the detecting part 11.

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]

2. Description of the Related Art Portable hair dryers, hair curlers and the like use a gas heating device such as a catalyst as a heat source, and as a means for detecting the combustion temperature of the combustion part, for example, it is disclosed in Japanese Patent Publication No. 3-21167. There was something that was done. FIG. 6 is a diagram showing a configuration of the conventional combustion temperature detecting section. The burner tube 102 arranged in parallel with the catalyst carrier 101 is made of a high expansion material having an excellent heat-sensitive function. A rod 103, which is made of a low expansion material and serves as an adjusting device, is fitted inside the tube. This rod 10
3 is fixedly coupled to the base portion 102F of the burner tube 102, and both are configured as an inner and outer tube type heat detecting member. One end of the rod 103 is attached to the lever 104. The lever 104 opens and closes the valve portion provided in the fuel supply passage of the nozzle 105 that ejects the fuel gas to the catalyst carrier 101. When the rod 103 expands and contracts, the lever 104 operates to open and close the valve portion. Is performed.

In the combustion temperature detector thus constructed, when the catalyst carrier 101 burns and the ambient temperature rises, the inner and outer tube type heat detecting members are activated, the rod 103 extends and the lever 104 moves to the nozzle 105. It swings in the direction of closing the valve to throttle the fuel supply. If the combustion is not sufficient, the rod 103 is shortened and swings in the direction to open the valve portion of the nozzle 105 to increase the fuel supply amount and raise the combustion temperature.

[0004]

As described above, the conventional device can control the gas flow rate in response to the temperature of the gas heating device such as a catalyst, and thus can provide a portable hair dryer having good combustion efficiency. However, since the valve portion is opened and closed by the function of the inner and outer tube type heat detection member, there is a problem that the structure becomes complicated. In addition, since the heat-sensitive portion is rod-shaped, the detection range is narrow, and there is a problem that the temperature is likely to be localized in a part of the catalyst carrier.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide a portable hair dryer in which the combustion temperature detecting section can be easily constructed and the detection range can be widened while maintaining good combustion efficiency.

[0006]

A portable hair dryer according to the present invention has a detection unit for detecting a combustion temperature in a catalytic combustion unit, which is formed by connecting one ends of a pair of plate-shaped alloys having different thermal expansions, One end is fixed to the dryer body, the other end is mechanically displaced by heating by combustion of the catalytic combustion unit, and the opening of the control valve of the nozzle is controlled. The control unit that controls the amount of fuel gas supplied from the gas cylinder is configured by a valve opening / closing mechanism that controls the opening degree of the control valve by the mechanical displacement generated in the detection unit.

[0007]

According to the structure of the present invention, since the temperature is detected by the plate-shaped heat-sensitive member, the structure of the detecting portion is simplified and the area of the plate-shaped portion is widened to detect the detecting portion. The detection range of can be widened. Also,
When the temperature around the catalytic combustion part changes and mechanical displacement occurs in the detection part, the valve opening / closing mechanism controls the opening of the control valve of the nozzle due to this displacement, so it stabilizes according to the temperature detection of the heat-sensitive member. The combustion state is maintained.

[0008]

Embodiments of the present invention will be described below with reference to FIGS. 1 to 5. FIG. 1 is a diagram showing a configuration of a hair dryer 1 according to a first embodiment of the present invention. A housing of a hair dryer main body 2 is made of a heat-resistant molded product, and inside the main body 2, A gas cylinder 3 for containing the fuel gas, a nozzle 4 located at the outlet of the gas supply path from the gas cylinder 3, a blower unit 6 for supplying air from the rear of the nozzle 4 toward the warm air outlet 5, and this blower A premixing section 7 for preliminarily mixing the air blown by the section 6 with the fuel gas to form a mixed gas, a preheating section 8 for heating the mixed gas mixed by the premixing section 7 to a predetermined temperature, and this preheating An ignition unit 9 for igniting the mixed gas in the unit 8, a catalytic combustion unit 10 for catalytically burning the mixed gas heated by the preheating unit 8, a detection unit 11 for detecting a temperature change in the catalytic combustion unit 10, and Detection And a control unit 12 for controlling the amount of fuel gas supplied from the gas cylinder 3 by controlling the opening and closing of the valve portion of the nozzle 4 according to a detection is provided at 11.

The gas cylinder 3 is a container for storing liquefied petroleum gas such as propane and butane, and is fixed to or detachable from the main body 2. As shown in FIG. 3, the nozzle 4 is fitted into a nozzle chamber 13a formed at an end of the relay pipe 13 to which the fuel gas in the gas cylinder 3 is supplied, and a locking piece 4a provided on an outer peripheral portion of the nozzle chamber 13a. A lever 32 constituting the valve opening / closing mechanism 14 described later is locked.
By moving the lever 32 in the direction of the arrow, the nozzle 4 is moved to the nozzle chamber 13 against the elastic force of a spring (not shown).
drawn from a. At this time, the area of the opening of the throttle opening 15a of the control valve 15 formed at the rear end of the nozzle 4 that communicates with the nozzle chamber 13a is reduced, and the supply amount of fuel gas is reduced. Further, the fuel gas ejection small hole 4a provided at the tip of the nozzle 4 pre-mixes the fuel gas, which is gasified by the liquefied gas in the gas cylinder 3 being vaporized in the relay pipe 13.
To spray at an appropriate speed. The flame combustion cylinder 16 is installed in association with the fuel gas ejected from the small holes 4a, and a plurality of small holes 16a are provided on the outer peripheral portion of the flame combustion cylinder 16.

The blower unit 6 comprises a fan 6a and a fan driving motor 6b and sends a required amount of air to the premixing unit 7.
The premixing unit 7 is a unit that mixes gas and air into a mixed gas having a constant ratio. The preheating part 8 is a part that heats the mixed gas to a predetermined temperature in order to promote catalyst combustion, and covers the outer periphery of the catalyst combustion part 10 described later and one end of which is extended to the premixing part 7. It is composed of a preheating fin 18 made of a conductor and a mesh net 19 made of a breathable heat conductor that covers the outlet of the flame combustion cylinder 16.

The ignition section 9 comprises a piezoelectric device 9a and an electrode 9b. The other electrode of the electrode 9b (a partner of spark discharge)
The outer peripheral portion of the flame combustion cylinder 16 corresponds to this. The catalyst combustion unit 10 uses a porous ceramic or metal such as a honeycomb or a foam as a carrier, carries a catalyst unit 20 carrying platinum, palladium, or the like, and holds the catalyst unit 20 inside and at the outer peripheral portion. Radiating fins 21 extending radially
And a cylindrical catalyst holding frame 22 having

The detecting portion 11 has one end fixed to a part of the main body 2 by means such as adhesion or caulking, for example, 3
A plate-like metal piece 24 of a low expansion material such as 6% Ni-Fe and a high expansion such as 100% Cu which is connected to the other end of the metal piece 24 at a bent end 25 by means such as welding or caulking. It is composed of a plate-shaped metal piece 26 of material. Figure 2
FIG. 4 is a perspective view showing an arrangement state of the detection unit 11 and the catalyst unit 20.

The control unit 12 is erected at the end of the plate-shaped metal piece 26 constituting the detection unit 11, and is rotated about a fulcrum 31 in accordance with the expansion and contraction of the plate-shaped metal piece 26 of the detection unit 11.
And the locking piece 4 of the nozzle 4 with which the lever 32 is locked.
and a valve opening / closing mechanism 14 including a. 28 is a storage battery that supplies power to the blower unit 6, and 29 is an electric circuit for controlling rotation of the motor 6b and charging.

Reference numeral 33 is an operation switch of the hair dryer. A shield plate 34 protects the main body 2 from the radiant heat of the catalytic combustion unit 10. Next, the operation of the embodiment configured as described above will be described. First, when the operation switch 33 is started to be pushed, the fuel gas flows from the gas cylinder 3 into the relay pipe 13. The throttle valve 15a of the control valve 15 of the nozzle 4 is in an open state, and the fuel gas is ejected from the small hole 4a of the nozzle 4. At this time, the motor 6b rotates at a very low speed according to a command from the control electric circuit 29 to perform the premixing unit 7 and the contact holding frame 22.
Send a breeze to the outer periphery of. Since the flame combustion cylinder 16 is located behind the wind of the motor 6b, almost no wind is sent into the flame combustion cylinder 16. When the operation switch 33 is further pressed, the piezoelectric device 9a is operated, spark discharge is generated between the electrode 9b and the outer peripheral portion of the flame combustion cylinder 16, and flame combustion starts inside the flame combustion cylinder 16. In the premixing section 7, there is a certain amount of air velocity, so flame combustion does not occur. Reference numeral 35 indicates a flame that becomes a fire source.

The heat energy generated by the flame combustion is transferred to the preheating net 19 and heats the mixed air approaching the premixing section 7. The mixed gas heated to about 200 degrees Celsius or higher starts catalytic combustion in the catalyst section 20. At this time, the motor 6b gradually shifts to full-speed rotation in response to a command from the control electric circuit 29, and starts to send a steady wind to the outer peripheral portions of the premixing unit 7 and the catalyst holding frame 22. The heat energy generated by catalytic combustion is transferred to the catalyst holding frame 22, and a part of the heat radiation fins 18
Is used to heat the mixed gas in the preheating section 8.

The plate-shaped metal piece 26 of the detection portion 11 expands in the direction of arrow Q as shown in FIG. 3 due to the radiation heat from the catalytic combustion portion 10 and the heat transfer from the radiation fin 21.
In the case of this example, when the length in the longitudinal direction is 50 mm, the temperature rises by 170 ° C. and the elongation is about 0.13 mm. For example, in FIG. 4 showing changes in the catalyst portion temperature, the fuel injection amount, and the expansion / contraction amount over time, the temperature of the catalyst portion 20 is
When the temperature rises to 1 ° C. and exceeds a predetermined temperature, the metal piece 26 correspondingly extends from the position shown by the solid line in FIG. 3 to the position shown by the imaginary line. At this time, the lever 32 and the nozzle 4 coupled thereto are also displaced to the position shown by the imaginary line, the opening area of the throttle opening 15a of the control valve 15 is reduced, and the fuel injection amount is reduced. Further, when the temperature of the catalyst portion falls below a predetermined temperature, the metal piece 26 shortens and performs the reverse operation, thereby increasing the fuel injection amount.

As described above, by constructing the detection unit 11 with a plate-shaped heat-sensitive member, the configuration of the detection unit itself is simplified and, in consideration of the arrangement with the catalyst combustion unit 10, it is fixed to the main body 2. Can be done easily. Further, since the heat-sensitive member is formed in a plate shape, the detection area of the detection unit 11 can be widened by increasing the area of the plate-shaped portion, the temperature detection accuracy is improved, and the stability shown in FIG. It is possible to realize the above combustion state.

When the operation is stopped, pushing the operation switch 33 again stops the supply of fuel gas and electric current. In the above-described embodiment, the preheating section 8 is composed of the preheating net 19 and the preheating fins 18, but the preheating effect can be exhibited even if only one of them is used. Also, preheating net 1
When a catalyst such as platinum or palladium is carried on the mesh surface of 9, the catalytic oxidation reaction partially starts in the preheating stage of the mixed gas and the heating of the mixed gas is promoted.
It is possible to make the catalytic combustion in step 1 faster and more efficiently.

Further, in this embodiment, the heat source of the preheating section 8 is the flame burning flame 35, but this flame may be extinguished at the stage of transition to catalytic combustion as in the conventional example. The heating of the mixed gas in that case is performed by the preheating fins 18 or the preheating net 19 carrying the catalyst. FIG. 5 is a perspective view showing the structure of the main part of the second embodiment, which is the detection part 11
Is made of a low expansion material such as 36% Ni—Fe material with respect to the catalyst portion 20, and extends from the cylindrical base portion 40 so as to vertically surround the catalyst portion 20 with the catalyst portion 20 interposed therebetween. , 42 and high expansion material such as 100% Cu,
The heat-sensitive member is composed of arc-shaped metal pieces 43 and 44 that are connected to the base portion 40 by means such as welding or caulking and that extend from the base portion 40 so as to surround the catalyst portion 20 in the left-right direction. Further, the lever 32 for opening and closing the fuel flow rate adjusting valve 30 is connected to a connecting shaft 46 of a rigid arm portion 45 whose both ends are sandwiched by the tip ends of the metal pieces 43, 44. The operation of the detection unit 11 configured as above is the same as that of the first embodiment, but since the temperature detection is performed by the heat-sensitive member that is wrapped around the catalyst unit 20, there is a problem in the inside of the catalyst unit 20. When uniform combustion occurs, partial temperature detection is not performed, and catalytic combustion can be performed under more stable fuel control.

[0020]

According to the portable hair dryer of the present invention, since the temperature is detected by the plate-shaped heat sensitive member, the structure of the detecting portion can be simplified. Further, since the heat-sensitive member is formed in a plate shape, the detection range of the detection unit can be widened, the temperature detection accuracy improves, and a stable combustion state can be maintained.

[Brief description of drawings]

FIG. 1 is a sectional view showing a configuration of a first embodiment of the present invention.

FIG. 2 is a perspective view showing a configuration of a main part of the first embodiment.

FIG. 3 is a sectional view showing a configuration of a main part of the first embodiment.

FIG. 4 is a graph showing changes in the temperature of the catalyst portion with time.

FIG. 5 is a perspective view showing a configuration of a main part of a second embodiment.

FIG. 6 is a partial cross-sectional view showing a configuration of a conventional example.

[Explanation of symbols]

 1 Hair Dryer 2 Main Body 3 Gas Cylinder 4 Nozzle 4 a Locking Piece 6 Blower 7 Premixing 8 Preheating 9 Ignition 1 0 Catalytic Combustion 1 1 Detector 1 2 Control 1 4 Valve Opening Mechanism 1 5 Control Valve 1 5 a Restrictor 3 1 Support 3 2 Lever

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[Procedure amendment]

[Submission date] February 7, 1992

[Procedure Amendment 1]

[Document name to be amended] Statement

[Name of item to be corrected] 0003

[Correction method] Change

[Correction content]

In the combustion temperature detecting portion configured as described above, when the catalyst carrier 101 burns and the ambient temperature rises, the inner and outer tube type heat detecting members operate, the burner tube 102 extends, and the lever 104 and the nozzle 105. Direction of closing valve part of (arrow
The fuel supply amount is reduced by rocking in the direction indicated by the mark X) . When the combustion is not sufficient, the burner tube 102 is shortened to open the valve portion of the nozzle 105 (the direction indicated by the arrow X ′).
Swings direction) to increase the combustion temperature to increase the supply amount of the fuel.

[Procedure Amendment 2]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 6

[Correction method] Change

[Correction content]

[Figure 6]

Claims (1)

[Claims] 1. A gas cylinder containing a fuel gas, a nozzle for ejecting the fuel gas supplied from the gas cylinder while adjusting the flow rate by opening and closing a control valve, a blower section for blowing air from the rear of the nozzle, A premixing unit that mixes the air blown by the blower unit and the fuel gas in advance to form a mixed gas, a preheating unit that heats the mixed gas mixed by the premixing unit to a predetermined temperature, and a heating unit that heats the preheating unit. A catalytic combustion unit that catalytically burns the mixed gas, a detection unit that detects the combustion temperature in the catalytic combustion unit, and a gas cylinder that controls the opening of the control valve of the nozzle according to the detection by the detection unit. A portable hair dryer comprising a control unit for controlling the amount of fuel gas supplied from the pair of plate-shaped heat-sensitive members having different thermal expansion coefficients. The other end is fixed to the dryer body, and the other end is mechanically displaced by heating by combustion of the catalytic combustion unit, and the control unit is connected to the detection unit. A portable hair dryer comprising a valve opening / closing mechanism that controls the opening degree of the control valve by the generated mechanical displacement.