Portable dryer with different circuit designs

Description

[0001] The present invention relates to a portable dryer according to the pre-characterizing clause of claim 1.

[0002] The conventional dryer is operable only after establishing connection with an AC power plug through a power cord. The use of the dryer is then limited by the length of the cord to the area that can be reached by the cord from the AC power receptacle. Therefore, it is very inconvenient for traveling purposes. In particular, when traveling in countries where the AC power specifications, such as voltages, cycles, and receptacles, that varies from one to another, different converters and transformers are needed if the user wants to use a conventional dryer. Furthermore, the conventional AC powered dryers are powered by AC currents with sinusoidal amplitudes, mostly using a diode to control the generation of heat. When the switch is shifted to low heat, the one-way conduction property of the diode filters out a half cycle of the AC current that passes through the heating filament. When the switch is shifted to high heat, the current to the heating filament does not go through the diode so that heat can be generated in full output. At the same time, in order to provide a DC current for the motor, an additional bridge rectifier has to be employed to supply the needed DC power.

[0003] A battery-operated portable dryer having parallel heating units is known from DE 198 31 417 A1. However, this prior art fails to allow multiple, user-selectable power and air flow levels.

[0004] This in mind, the present invention aims at providing a corresponding portable dryer that is operable without the need of connecting to an AC power receptacle, and that can generate heat of different strengths so that the fan blows out different airflow and heat for the convenience of the user.

[0005] This in achieved by a portable dryer according to claim 1. The dependent claims pertain to corresponding further developments and improvements.

[0006] As will be seen more clearly from the detailed description following below, the claimed portable dryer has a battery and can be controlled by a switch to obtain different levels of airflow. Accordingly, the portable dryer is operable without the need of connecting to an AC power receptacle and the portable dryer can blow heat at different levels.

[0007] In the following, the invention is further illustrated by way of example, taking reference to the accompanying drawings. Thereof

Fig. 1 is a schematic view of a portable dryer according to one embodiment of the present invention,

Fig. 2 is a schematic view of a portable dryer according to another embodiment of the present invention,

Figs. 3 to 5 are circuit diagrams of a first circuit according to the present invention,

Fig. 6 shows the calculation of the power generated from the first circuit in Figs. 3-5,

Figs. 7 to 9 are circuit diagrams of a second circuit according to the present invention,

Fig. 10 shows the calculation of the power generated from the second circuit in Figs. 7-9,

Fig. 11 is a circuit diagram of a third circuit according to the present invention,

Fig. 12 is a circuit diagram of a fourth circuit according to the present invention,

Figs. 13-15 are circuit diagrams of a fifth circuit according to the present invention, and

Figs. 16-18 are circuit diagrams of a sixth circuit according to the present invention.

[0008] Refer to Fig.1, which is a schematic view of a portable dryer according to one embodiment of the present invention. The portable dryer has a housing 1 with an opening 11 on one end thereof, a motor 2 installed inside the housing 1, an electric heating element 3 electrically coupled to the motor 2 for generating heat, and an overload protection device electrically coupled to a battery that supplies the electric power, for preventing damages of the portable dryer. In the preferred embodiment, the overload protection device 4 is a fuse. However, this should not be construed to mean that only fuses can be used as overload protection devices. The portable dryer further includes a switch 5 electrically coupled to the motor 2, the battery 6, the switch 5, the motor 2, and the electric heating element 3.

[0009] The battery 6 can be a storage battery, dry-cell battery or a rechargeable battery. It is connected to the switch 5, the motor 2, the electric heating element 3 and the overload protection device 4 via wires 13, forming a closed circuit loop. A fan 21 is coupled to the motor 2 so that the motor 2 can rotate the fan 21 to produce airflow. The electric heating element 3 comprises a first heating filament 31 and a second heating filament 313 (in the current embodiment, the first and second heating filaments 31, 313 each can be formed by more than one heating filament). The first heating filament 31 first connects to the motor 2 in series, which are then connected to the second heating filament 313 in parallel, the circuit thus formed is then connected to the switch 5 and the overload protection device 4. The switch 5 is provided with a movable, rotatable or depressible button 51 with one end protruding out of the housing 1 so that a user can control the switch 5 by using the button 51.

[0010] With the above configuration, the user can push, rotate or depress the button 51 to an on position so that the electric power is supplied from the battery 6 to the motor 2 and the electric heating element 3, causing the electric heating element 3 to generate heat and the motor 2 to drive the fan 21 so that hot air generated by the electric heating element 3 is blown out of the housing 1 from the opening 11. Since the electric power is supplied by the battery 6, the use of the dryer will not be limited by the length of a wire connecting the dryer and a receptacle.

[0011] Referring now to Fig. 2, which is a schematic view of another portable dryer according to another embodiment of the present invention. In this embodiment, the housing I is a hollow box 15. The box 15 having an air outlet 151 on one side, and a handle 153 installed on the top of the box 15. Inside the housing 1 are a motor 2, an electric heating element 3 and an overload protection device 4 installed between the motor 2 and the air outlet 151, and a switch 5 and a battery 6. The battery 6 is connected to the switch 5, the motor 2, the electric heating element 3 and the overload protection device 4 through wires 13, forming a closed circuit loop. A fan 21 is installed on the motor 2. The electric heating element 3 comprises a first heating filament 31 and a second heating filament 313 (in the current embodiment, the first and second heating filaments 31, 313 each can be formed by more than one heating filament). The first heating filament 31 first connects to the motor 2 in series, which are then connected to the second heating filament 313 in parallel, the circuit thus formed is then connected to the switch 5 and the overload protection device 4.

[0012] The user can push, rotate or depress the button 51 to an on position so that the power can be supplied from the battery 6 to the motor 2 and the electric heating element 3, causing the electric heating element 3 to generate heat and the motor 2 to drive the fan 21 so that hot air generated by the electric heating element 3 is blown out of the housing 1 from the air outlet 151.

[0013] Referring now to Figs. 3 to 5, which illustrates circuit diagrams of a first circuit according to the present invention. The switch 5 comprises a fan shaped conductor 53 and a plurality of connecting nodes 55. The conductor 53 is coupled to the battery 6 via a wire 13, the connecting end of the conductor 53 to the battery 6 is pivotally coupled to on the switch 5. The connecting nodes 55 are coupled to an overload protection device 4, the first and second heating filaments 31, 313 and the motor 2, forming a closed circuit loop. When the conductor 53 is not rotated, the battery 6 is not electrically connected with the motor 2 and the electric heating element 3 (as shown in Fig. 3) so that the motor 2 does not run and the electric heating element 3 does not generate heat.

[0014] By rotating the conductor 53, the motor 2 and the first heating filament 31 become electrically connected with the battery 6, forming a closed circuit loop (as shown in Fig. 4) powered by the battery 6. We then have:

the total resistance R=R_DCM+R_1A, where R_DCM is the internal resistance of the motor 2 and R_1A is the resistance of the first heating filament 31;

the total current I=V/(R_DCM+R_1A), where V is the total output voltage of the battery 6;

the voltage difference between both ends of the motor 2 is V_DCM= R_DCM ·V/(R_DCM+R_1A);

the power generated by the motor 2 is W_DCM= R_DCM ·V²/(R_DCM+R_1A)²; and

the total power is W=V²/(R_DCM+R_1A).

[0015] In the case that the conductor 53 is rotated further to electrically couple to the first and second heating filaments 31, 313 with the battery 6 (as shown in Fig. 5). Then,
the total resistance R'=R_DCM+(R_1A·R_1B)/(R_1A+R_1B), where R_1B is the resistance of the second heating filament 313;
the total current is


the power generated by the motor 2 is


the total power is W'=V²/R'.

[0016] With reference to Fig. 6, which shows power generated from the first circuit. One can calculate from the above equations that by adjusting the resistance R_1B of the second heating filament 313, the speed of the motor 2 can be changed. Suppose R_1B =42Ω, the power of the motor 2 can be doubled and the output airflow is thus doubled. If the motor power is increased by a factor of N, the total power is increased by a factor of N^1/2 only.

[0017] Referring to Figs. 7 to 9, which show circuit diagrams of a second circuit according to the present invention. The switch 5 comprises a conductor 53 and a plurality of connecting nodes 55. The conductor 53 is connected to the battery 6 via a wire 13 and can be slid over some of the connecting nodes 55. The connecting nodes 55 are coupled to an overload protection device 4, the first and second heating filaments 31, 313 and the motor 2. The connecting nodes 55 are also coupled to the overload protection device 4 and a third heating filament 33. The third heating filament 33 is connected in a parallel arrangement with the first and second heating filaments 31, 313, but is not directly in series with the motor (2). When the conductor 53 is not engaged, the battery 6 is not electrically connected to the motor 2 and the electric heating element 3 so that the motor 2 does not run and the first, second, and third heating filaments 31, 313, 33 do not generate heat (as shown in Fig. 7).

[0018] When the conductor 53 is shifted to the position as shown in Fig. 8, the motor 2 and the first heating filament 31 are electrically coupled to the battery 6, forming a closed circuit loop powered by the battery 6. We then have:

the power generated by the motor 2 is W_DCM= R_DCM ·V²/(R_DCM+R_1A)², where R_DCM is the internal resistance of the motor 2, R_1A is the resistance of the first heating filament 31 and V is the total output voltage of the battery 6;

the total power is W=V²/(R_DCM+R_1A).

[0019] Referring to Fig. 9, wherein the conductor 53 is further shifted to electrically couple the motor 2 with the first, second, and third heating filaments 31, 313, 33 and the battery 6. Then,
the resistance R₁= R_1A·R_1B/(R_1A+R_1B), where R_1A is the resistance of the first heating filament 31 and R_1B is the resistance of the second heating filament 313;
the power generated by the motor 2 is


the total power is W'=V²·(R_DCM+R₁+R₂)/((R_DCM+R₁)·R₂), where R₂ represents the resistance of the third heating filament 33.

[0020] Please refer to Fig. 10, which shows power generated from the second circuit. As shown in Fig. 10, one can calculate from the above equations that W'_DCM/W_DCM=2. That is, the rotational speed of the motor 2 doubles. But the total power ratio W'/W=2.15, which means that the heat is increased by a factor of 2.15. Therefore, by adjusting the R_1B of the second heating filament 313 and controlling the switch 5, the speed of the motor 2 can be changed. Adjusting the R₂ value can control the total output power, which improves the first circuit of the invention where the total output power is limited by the motor power.

[0021] Referring now to Fig. 11, which shows a circuit diagram of a third circuit according to the present invention. The switch 5 includes an H shaped conductor 53 and a plurality of connecting nodes 55. One of the connecting nodes 55 is coupled to the battery 6 by a wire 13. The conductor 53 is slid over a portion of the connecting nodes 55. The connecting nodes 55 are coupled to an overload protection device 4, the first and second heating filaments 31, 313 and the motor 2 via wires 13. By sliding the conductor 53, the motor 2 and the first heating filament 31 are electrically coupled to the battery 6. Or the motor 2 and the first and second heating filaments 31, 313 are electrically coupled to the battery 6. The electric heating element 3 then generates different amounts of heat and the motor 2 runs at different speeds, causing the fan 21 to blow out hot air with different speeds and temperatures.

[0022] Referring to Fig. 12, which shows a circuit diagram of a fourth circuit according to the present invention. The difference between the third circuit and the fourth circuit is that the switch 5 in Fig. 12 is a tri-state switch. The tri-state switch 5 can be switched into three different states. When an upper end 60 of the tri-state switch 5 is depressed, the first heating filament 31 is electrically coupled to the battery 6. When a lower end 62 of the tri-state switch 5 is depressed, the first and second heating filaments 31, 313 are electrically coupled to the battery 6. When neither the upper end 60 nor the lower end 62 of the tri-state switch 5 is depressed, both heating filaments 31, 313 are electrically disconnected from the battery 6. The electric heating element 3 then generates different amounts of heat and the motor 2 runs at different speeds, causing the fan 21 to blow out hot air with different speeds and temperatures.

[0023] Referring to Figs. 13-15, which show circuit diagrams of a fifth circuit according to the present invention. The difference between the second circuit in Fig.7-9 and the fifth circuit is that one end of the conductor 53 is pivotally coupled to a connecting node 55, and through the connection with the battery 6 via a wire 13 the other end of the conductor is able to get into electrical contact with the plurality of connecting nodes 55 by rotation, so as to electrically disconnect all three heating filaments 33, 31, 313 from the motor 2 as shown in Fig.13, to electrically connect the first heating filament 31 with the motor 2 as shown in Fig. 14, or to electrically connect all three heating filaments 33, 31, 313 as shown in Fig.15. The electric heating element 3 then generates different amounts of heat and the motor 2 runs at different speeds, causing the fan 21 to blow out hot air with different speeds and temperatures.

[0024] Referring to Figs. 16-18, which show circuit diagrams of a sixth circuit according to the present invention. The difference between the second circuit in Fig.7-9 and the sixth circuit is that the switch 5 in Fig. 16-18 is a tri-state switch. The tri-state switch 5 can be switched into three different states. When neither an upper end 60 nor a lower end 62 of the tri-state switch 5 is depressed, none of the heating filaments 33, 31, 313 is electrically connected to the battery 6 as shown in Fig.16. When the upper end 60 of the tri-state switch 5 is depressed, the first heating filament 31 is electrically coupled to the motor 2 as shown in Fig.17. When the lower end 62 of the tri-state switch 5 is depressed, all of the heating filaments 33, 31, 313 are electrically coupled to the motor 2 as shown in Fig.18. The electric heating element 3 then generates different amounts of heat and the motor 2 runs at different speeds, causing the fan 21 to blow out hot air with different speeds and temperatures.

[0025] Comparing to the related art, the portable dryers of the present invention are powered by batteries, not by power cords. Thus their usage is not limited by their distances from receptacles. Moreover, through different arrangements of the electric heating element the motor speed can be changed to obtain different heating output.

Claims

1. A portable dryer comprising:

a housing (1) with an opening (11) at one end thereof;

a motor (2) having a fan (21) installed inside said housing (1);

two heating filaments (31, 313) coupled in parallel;

a switch (5) electrically coupled to the motor (2); and

a battery (6) electrically coupled to the switch (5), the motor (2), and the coupled heating filaments (31,313) in series for supplying electric power;

characterized in that

the switch (5) is capable of being controlled to electrically disconnect both heating filaments (31, 313) and the motor (2) from the battery (6), to electrically connect the battery (6) and the motor (2) with only one of the heating filaments (31, 313), or to electrically connect the battery (6) and the motor (2) with both heating filaments (31, 313).

2. The portable dryer of claim 1 characterized in that the switch (5) comprises a conductor (53) and a plurality of connecting nodes (55), one end of the conductor (53) being pivotally coupled to one of the connecting nodes (55), and through the connection with the battery (6) via a wire (13) the other end of the conductor (53) being able to get into electrical contact with the plurality of connecting nodes (55) by rotation so as to electrically disconnect both heating filaments (31, 313) from the motor (2), to electrically connect the motor (2) with only one of the heating filaments (31, 313), or to electrically connect the motor (2) with both heating filaments (31, 313).

3. The portable dryer of claim 2 characterized in that the conductor (53) is of an approximately fan shape.

4. The portable dryer of claim 1 characterized in that the portable dryer further comprises an overload protection device (4) electrically coupled to the battery (6) for preventing damages to the portable dryer.

5. The portable dryer of claim 4 characterized in that the overload protection device (4) is a fuse.

6. The portable dryer of claim 1 characterized in that the battery (6) is a dry cell battery.

7. The portable dryer of claim 1 characterized in that the battery (6) is a rechargeable battery.

8. The portable dryer of claim 1 characterized in that the portable dryer further comprises a handle (153) installed on the housing (1) for carrying the portable dryer.

9. The portable dryer of claim 1 characterized in that the switch (5) comprises a displaceable conductor (53) capable of being shifted to electrically disconnect both heating filaments (31, 313) from the motor (2), to electrically connect the motor (2) with only one of the heating filaments (31, 313), or to electrically connect the motor (2) with both heating filaments (31, 313).

10. The portable dryer of claim 9 characterized in that the conductor (53) is of an approximately H in shape.

11. The portable dryer of claim 1 characterized in that the switch (5) comprises a tri-state switch capable of being switched to electrically disconnect both heating filaments (31, 313) from the motor (2), to electrically connect the motor (2) with only one of the heating filaments (31, 313), or to electrically connect the motor (2) with both heating filaments (31, 313).

12. The portable dryer of claim 1 further characterized by a third heating filament (33) coupled with the first and second heating filaments (31, 313),
that the switch (5) is capable of controlling to electrically disconnect all three heating filaments (33, 31, 313) and the motor (2) from the battery (6), to electrically connect the first heating filament (31) and the motor (2) with the battery (6), or to provide the battery (6) connected to a first circuit in parallel with a second circuit, the first circuit comprising the motor (2) in series with a parallel arrangement of the first and second heating filaments (31, 313), the second circuit comprising the third heating filament (33).

13. The portable dryer of claim 12 characterized in that the switch (5) comprises a conductor (53) and a plurality of connecting nodes (55), one end of the conductor (53) being pivotally coupled to one of the connecting nodes (55), and through the connection with the battery (6) via a wire (13) the other end of the conductor (53) being able to get into electrical contact with the plurality of connecting nodes (55) by rotation, so as to electrically disconnect all three heating filaments (33, 31, 313) from the motor (2), to electrically connect the first heating filament (31) with the motor (2), or to provide a parallel arrangement of the first circuit and the second circuit.

14. The portable dryer of claim 13 characterized in that the conductor (53) is of an approximately fan shape.

15. The portable dryer of claim 12 characterized in that the switch (5) comprises a displaceable conductor (53) capable of being shifted to electrically disconnect all three heating filaments (33, 31, 313) from the motor (2), to electrically connect the first heating filament (31) with the motor (2), or to provide a parallel arrangement of the first circuit and the second circuit.

16. The portable dryer of claim 15 characterized in that the displaceable conductor (53) has two separate conducting pieces.

17. The portable dryer of claim 12 characterized in that the battery (6) is a rechargeable battery.

18. The portable dryer of claim 12 characterized in that the switch (5) comprises a tri-state switch capable of being switched to electrically disconnect all three heating filaments (33, 31, 313) from the motor (2), to electrically connect the first heating filament (31) with the motor (2), or to provide a parallel arrangement of the first circuit and the second circuit.

Ansprüche

1. Tragbarer Trockner, der umfasst:

ein Gehäuse (1) mit einer Öffnung (11) an einem Ende desselben;

einen Motor (2) mit einem Gebläse (21), der im Inneren des Gehäuses (1) installiert ist;

zwei Heizfäden (31, 313), die parallel gekoppelt sind;

einen Schalter (5), der elektrisch mit dem Motor (2) gekoppelt ist; und

eine Batterie (6), die in Reihe elektrisch mit dem Schalter (5), dem Motor (2) und den verbundenen Heizfäden (31, 313) gekoppelt ist, um elektrische Energie zuzuführen;

dadurch gekennzeichnet, dass:

der Schalter (5) so betätigt werden kann, dass beide Heizfäden (31, 313) und der Motor (2) elektrisch von der Batterie (6) getrennt werden, die Batterie (6) und der Motor (2) elektrisch mit nur einem der Heizfäden (31, 313) verbunden werden oder die Batterie (6) und der Motor (2) elektrisch mit beiden Heizfäden (31, 313) verbunden werden.

2. Tragbarer Trockner nach Anspruch 1, dadurch gekennzeichnet, dass der Schalter (5) einen Leiter (53) und eine Vielzahl von Verbindungsknoten (55) umfasst, wobei ein Ende des Leiters (53) schwenkbar mit einem der Verbindungsknoten (55) gekoppelt ist und durch die Verbindung mit der Batterie (6) über einen Draht (13) das andere Ende des Leiters (53) durch Drehung in elektrischen Kontakt mit der Vielzahl von Verbindungsknoten (55) kommen kann, um beide Heizfäden (31, 313) elektrisch von dem Motor (2) zu trennen, den Motor (2) elektrisch mit nur einem der Heizfäden (31, 313) zu verbinden oder den Motor (2) elektrisch mit beiden Heizfäden (31, 313) zu verbinden.

3. Tragbarer Trockner nach Anspruch 2, dadurch gekennzeichnet, dass der Leiter (53) annähernd fächerförmig ist.

4. Tragbarer Trockner nach Anspruch 1, dadurch gekennzeichnet, dass der tragbare Trockner des Weiteren eine Überlastschutzvorrichtung (4) umfasst, die elektrisch mit der Batterie (6) gekoppelt ist, um Schäden an dem tragbaren Trockner zu verhindern.

5. Tragbarer Trockner nach Anspruch 4, dadurch gekennzeichnet, dass die Überlastschutzvorrichtung (4) eine Sicherung ist.

6. Tragbarer Trockner nach Anspruch 1, dadurch gekennzeichnet, dass die Batterie (6) eine Trockenbatterie ist.

7. Tragbarer Trockner nach Anspruch 1, dadurch gekennzeichnet, dass die Batterie (6) eine wiederaufladbare Batterie ist.

8. Tragbarer Trockner nach Anspruch 1, dadurch gekennzeichnet, dass der tragbare Trockner des Weiteren einen Griff (153) umfasst, der an dem Gehäuse (1) zum Tragen des tragbaren Trockners installiert ist.

9. Tragbarer Trockner nach Anspruch 1, dadurch gekennzeichnet, dass der Schalter (5) einen verschiebbaren Leiter (53) umfasst, der verschoben werden kann, um beide Heizfäden (31, 313) elektrisch von dem Motor (2) zu trennen, den Motor (2) elektrisch mit nur einem der Heizfäden (31, 313) zu verbinden oder den Motor (2) elektrisch mit beiden Heizfäden (31, 313) zu verbinden.

10. Tragbarer Trockner nach Anspruch 9, dadurch gekennzeichnet, dass der Leiter (53) annähernd H-förmig ist.

11. Tragbarer Trockner nach Anspruch 1, dadurch gekennzeichnet, dass der Schalter (5) einen Dreizustands-Schalter umfasst, der so geschaltet werden kann, dass er beide Heizfäden (31, 313) elektrisch von dem Motor (2) trennt, den Motor (2) elektrisch mit nur einem der Heizfäden (31, 313) verbindet oder den Motor (2) elektrisch mit beiden Heizfäden (31, 313) verbindet.

12. Tragbarer Trockner nach Anspruch 1, des Weiteren gekennzeichnet
durch einen dritten Heizfaden (33), der mit dem ersten und dem zweiten Heizfaden (31, 313) gekoppelt ist, dadurch, dass der Schalter (5) so betätigen kann, dass alle drei Heizfäden (33, 31, 313) und der Motor (2) elektrisch von der Batterie (6) getrennt werden, der erste Heizfaden (31) und der Motor (2) elektrisch mit der Batterie (6) verbunden werden, oder der Batterie (6), die mit einem ersten Stromkreis verbunden ist, parallel ein zweiter Stromkreis bereitgestellt wird, wobei der erste Stromkreis den Motor (2) in Reihe mit einer parallelen Anordnung des ersten und des zweiten Heizfadens (31, 313) umfasst, und der zweite Stromkreis den dritten Heizfaden (3) umfasst.

13. Tragbarer Trockner nach Anspruch 12, dadurch gekennzeichnet, dass der Schalter (5) einen Leiter (53) und eine Vielzahl von Verbindungsknoten (55) umfasst, wobei ein Ende des Leiters (53) schwenkbar mit einem Verbindungsknoten (55) gekoppelt ist und durch die Verbindung mit der Batterie (6) über einen Draht (13) das andere Ende des Leiters (53) durch Drehung in elektrischen Kontakt mit der Vielzahl von Verbindungsknoten (55) kommen kann, um alle drei Heizfäden (33, 31, 313) elektrisch von dem Motor (2) zu trennen, den ersten Heizfaden (31) elektrisch mit dem Motor (2) zu verbinden oder eine parallele Anordnung des ersten Stromkreises und des zweiten Stromkreises bereitzustellen.

14. Tragbarer Trockner nach Anspruch 13, dadurch gekennzeichnet, dass der Leiter (53) annähernd fächerförmig ist.

15. Tragbarer Trockner nach Anspruch 12, dadurch gekennzeichnet, dass der Schalter (5) einen verschiebbaren Leiter (53) umfasst, der verschoben werden kann, um alle drei Heizfäden (33, 31, 313) elektrisch von dem Motor (2) zu trennen, den ersten Heizfaden (31) elektrisch mit dem Motor (2) zu verbinden oder eine parallele Anordnung des ersten Stromkreises und des zweiten Stromkreises bereitzustellen.

16. Tragbarer Trockner nach Anspruch 15, dadurch gekennzeichnet, dass der verschiebbare Leiter (53) zwei separate leitende Teile hat.

17. Tragbarer Trockner nach Anspruch 12, dadurch gekennzeichnet, dass die Batterie (6) eine wiederaufladbare Batterie ist.

18. Tragbarer Trockner nach Anspruch 12, dadurch gekennzeichnet, dass der Schalter (5) einen Dreizustands-Schalter umfasst, der so geschaltet werden kann, dass er alle drei Heizfäden (33, 31, 313) elektrisch von dem Motor (2) trennt, den ersten Heizfaden (31) elektrisch mit dem Motor (2) verbindet oder eine parallele Anordnung des ersten Stromkreises und des zweiten Stromkreises bereitstellt.

Revendications

1. Séchoir portatif comprenant :

un boîtier (1) ayant une ouverture (11) à l'une de ses extrémités ;

un moteur électrique (2) comportant un ventilateur (21) installé à l'intérieur dudit boîtier (1) ;

deux filaments chauffants (31, 313) montés en parallèle ;

un commutateur (5) relié électriquement au moteur (2) ; et

une batterie (6) reliée électriquement en série avec le commutateur (5), le moteur (2) et les filaments chauffants (31, 313) pour fournir du courant électrique ;

caractérisé en ce que

le commutateur (5) peut être commandé pour déconnecter électriquement de la batterie (6) les deux filaments chauffants (31, 313) et le moteur (2), ou pour connecter électriquement la batterie (6) et le moteur (2) à un seul des filaments chauffants (31, 313) ou aux deux filaments chauffants (31, 313).

2. Séchoir portatif selon la revendication 1, caractérisé en ce que le commutateur (5) comprend un conducteur (53) et de multiples noeuds de connexion (55), l'une des extrémités du conducteur (53) étant reliée de manière pivotante à l'un des noeuds de connexion (55),tandis que l'autre extrémité du conducteur (53), grâce à la connexion à la batterie (6) par l'intermédiaire d'un fil (13), peut être mise en contact électrique avec les multiples noeuds de connexion (55) par rotation, pour déconnecter électriquement du moteur (2) les deux filaments chauffants (31, 313), ou pour connecter électriquement le moteur (2) à un seul des filaments chauffants (31, 313) ou aux deux filaments chauffants (31, 313).

3. Séchoir portatif selon la revendication 2, caractérisé en ce que le conducteur (53) a approximativement la forme d'un éventail.

4. Séchoir portatif selon la revendication 1, caractérisé en ce qu'il comprend en outre un dispositif (4) de protection contre les surcharges relié électriquement à la batterie (6), pour éviter sa détérioration.

5. Séchoir portatif selon la revendication 4, caractérisé en ce que le dispositif de protection de surcharge (4) est un fusible.

6. Séchoir portatif selon la revendication 1, caractérisé en ce que la batterie (6) est une batterie à pile sèche.

7. Séchoir portatif selon la revendication 1, caractérisé en ce que la batterie (6) est une batterie rechargeable.

8. Séchoir portatif selon la revendication 1, caractérisé en ce qu'il comprend en outre une poignée (153) installée sur le boîtier (1) pour permettre de le porter.

9. Séchoir portatif selon la revendication 1, caractérisé en ce que le commutateur (5) comprend un conducteur déplaçable (53) pouvant être décalé pour déconnecter électriquement du moteur (2) les deux filaments chauffants (31, 313), ou pour connecter électriquement le moteur (2) à un seul des filaments chauffants (31, 313) ou aux deux filaments chauffants (31, 313).

10. Séchoir portatif selon la revendication 9, caractérisé en ce que le conducteur (53) a approximativement la forme d'un H.

11. Séchoir portatif selon la revendication 1, caractérisé en ce que le commutateur (5) comprend un commutateur à trois états pouvant être commuté pour déconnecter électriquement du moteur (2) les deux filaments chauffants (31, 313), ou pour connecter électriquement le moteur (2) à un seul des filaments chauffants (31, 313) ou aux deux filaments chauffants (31, 313).

12. Séchoir portatif selon la revendication 1, caractérisé en outre par un troisième filament chauffant (33) relié aux premier et deuxième filaments chauffants (31, 313), en ce que le commutateur (5) est apte à être commandé pour déconnecter électriquement de la batterie (6) les trois filaments chauffants (33, 31, 313) et le moteur (2), pour connecter électriquement le premier filament chauffant (31) et le moteur (2) à la batterie (6) ou pour permettre la connexion de celle-ci à un premier circuit en parallèle avec un second circuit, le premier circuit comprenant le moteur (2) en série avec un montage en parallèle des premier et deuxième filaments chauffants (31, 313), le second circuit comprenant le troisième filament chauffant (33).

13. Séchoir portatif selon la revendication 12, caractérisé en ce que le commutateur (5) comprend un conducteur (53) et de multiples noeuds de connexion (55), l'une des extrémités du conducteur (53) étant reliée de manière pivotante à l'un des noeuds de connexion (55), tandis que l'autre extrémité du conducteur (53), grâce à la connexion à la batterie (6) par l'intermédiaire d'un fil (13), peut être mise en contact électrique avec les multiples noeuds de connexion (55) par rotation, pour déconnecter électriquement du moteur (2) les trois filaments chauffants (33, 31, 313), pour connecter électriquement le premier filament chauffant (31) au moteur (2) ou pour réaliser un montage en parallèle du premier circuit et du second circuit.

14. Séchoir portatif selon la revendication 13, caractérisé en ce que le conducteur (53) a approximativement la forme d'un éventail.

15. Séchoir portatif selon la revendication 12, caractérisé en ce que le commutateur (5) comprend un conducteur déplaçable (53) pouvant être décalé pour déconnecter électriquement du moteur (2) les trois filaments chauffants (33, 31, 313), pour connecter électriquement le premier filament chauffant (31) au moteur (2) ou pour réaliser un montage en parallèle du premier circuit et du second circuit.

16. Séchoir portatif selon la revendication 15, caractérisé en ce que le conducteur déplaçable (53) comporte deux pièces conductrices séparées.

17. Séchoir portatif selon la revendication 12, caractérisé en ce que la batterie (6) est une batterie rechargeable.

18. Séchoir portatif selon la revendication 12, caractérisé en ce que le commutateur (5) comprend un commutateur à trois états pouvant être commuté pour déconnecter électriquement du moteur (2) les trois filaments chauffants (33, 31, 313), pour connecter électriquement le premier filament chauffant (31) au moteur (2) ou pour réaliser un montage en parallèle du premier circuit et du second circuit.

Drawing