JP2580304Y2 - Dryer - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a dryer, and particularly to a portable dryer which can be used in areas having different power supply voltages. 2. Description of the Related Art Conventionally, in a dryer of this kind, which further has a cold air position in a mode changeover switch, a linear heater having a relatively high resistance value per unit length and a low band shape as a heater for hot air are used. In an area where 240 V is used as a commercial voltage, the above-mentioned two heaters are connected in series in a region where commercial voltage is used, and in a region where 120 V is used, a linear heater portion is short-circuited to energize only the band heater. In addition, there has been proposed a device capable of performing blast heating with substantially the same power regardless of a difference in drive voltage. [0003] However, in the above-described configuration, when the 240 V is used, only the linear heater generates heat, and when the 120 V is used, only the strip heater generates heat. In addition to requiring more storage space for the heater, and the amount of heat generated per unit length during heating differs between the two drive voltages, the temperature distribution around the heater becomes non-uniform between the two drive voltages, resulting in a thermostat or thermal fuse. It is difficult to set the installation position and the temperature of the safety device such as the safety device, and the operation becomes unstable. [0004] The present invention has been made in view of the above-mentioned problem, and the non-uniformity of the air temperature at the time of blowing hot air is eliminated as much as possible, so that the safety device can be operated stably. And provide a dryer with a cool air position
Together, the different switches of current capacity and contacts format, and to provide a dryer having a structure that enables switching in conjunction. [0005] A dryer according to the present invention.
As shown in FIGS. 1 and 2, (10) is a heating unit (16), a blowing unit (18) for blowing air toward the heating unit (16), and a blowing unit (18).
And a switching unit (20) that can manually change the energization state of the heating unit (16). Heating part (1
6) includes two resistance wires (56a and 56b) having substantially the same characteristics at substantially the same length, while the switching unit (20) includes a mode changeover switch (22) and a drive voltage changeover switch (24). Have. Further, the drive voltage changeover switch (24) has a heating section (16).
A contact that allows the connection of the two resistance wires (56a and 56b) to be selectively changed to a series or parallel state, and a contact that allows the resistance of the motor resistance (52) of the blower (18) to be changed. Is provided. The mode changeover switch (22) is provided with a contact capable of changing an energized state to energize only the air blower (18) or simultaneously energize the air blower (18) and the heat generator (16). The contacts in the drive voltage changeover switch (24) of the switching section (20) are independent switches such as a rotary switch (30) and a push switch (32). An operation knob (34) that switches in conjunction with each other for the contacts of
It has. By operating the drive voltage changeover switch (24) in accordance with the value of the commercial AC voltage to be used, for example, when the voltage value is 240 V, two resistance wires are used.
(56) are connected in series, and in the case of 120 V, they are connected in parallel to reduce the resistance value to 1/4. Here, when the mode change switch (22) is operated, only the air blower or the air blower corresponding to the switch position is operated.
The air sent from (18) is heated by the heating section (16), but the power per unit length consumed by the two resistance wires (56) is almost the same regardless of the voltage value. The air sent from the section (18) is heated under substantially the same conditions. Further, by forming the contacts of the drive voltage changeover switch (24) as switches independent of each other, a switch optimal for the required number of contacts or current capacity is selected for each contact, and a stable energizing operation is performed. At the same time, reliable contact switching is performed in conjunction with the operation of the operation knob (34). DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An example in which the present invention is applied to a hair dryer that only blows air will be described below. However, the present invention can be applied to dryers of various types, such as those equipped with a curling brush or a heating iron, in a similar manner. Of course. As shown in FIGS. 1 and 2, the dryer (10) according to the present invention comprises a handle (14) rotatably provided at the base end of a substantially cylindrical body case (12). In (12), a heating section (16) is provided in the vicinity of the opening (64), and a blowing section (18) for blowing air toward the heating section (16) is provided at a rear position,
Further, a switching section (20) for performing various switching operations is provided in the handle (14). The switching section (20) is composed of a mode changeover switch (22) and a drive voltage changeover switch (24). The air blowing state can be changed in three stages between hot air and strong hot air. On the other hand, in conjunction with the operation of the drive voltage changeover switch (24), the air can be blown under substantially the same condition regardless of the difference between the commercial AC voltage of 120V and 240V. The mode change switch (22) is a switch knob.
It has first to third contacts (28a, 28b, 28c) that turn on and off in conjunction with the vertical sliding operation of (26), and all contacts (28) are opened at the lowest position of the switch knob (26). ,
Each time the switch knob (26) is moved upward by one step, the number of contacts to be turned on is increased in order from the first contact (28a), and
All the contacts (28a, 28b, 28c) are turned on at the slide position of the step. On the other hand, the drive voltage changeover switch (24) is provided with a rotary switch (30) in the heating section (16) for handling a large current and a press switch (32) in the blower section (18) for handling a small current. And one set. Further, as shown in FIG. 3, in conjunction with the rotation of the operation knob (34) attached to the rotary switch (30), the ON / OFF operation of the push switch (32) can be simultaneously performed in addition to the switching of the rotary switch (30). I have to. That is, the rotary switch (30) is a changeover switch provided with two movable contacts (36a and 36b), and the operation knob (34) whose tip is exposed on the wall surface of the handle (14) is indicated by a chain line. The two contacts (36a and 36b) are simultaneously switched from the solid line side to the broken line side in FIG. On the other hand, the pressing switch (32) is a normally open limit switch, extending the pressing piece (38) outward from the periphery of the operation knob (34), and turning the pressing piece (38). By disposing the push switch (32) corresponding to the moving position, the switching operation of the rotary switch (30) by the operation knob (34) and the contact of the push switch (32) on the lower surface of the push piece (38) are performed simultaneously. (32a) is turned on. The number of the pressing switches (32) is not limited to one, but can be increased to two or more, and the switching position of the rotary switch (30) is increased to three or more steps, It is also possible to provide one push switch (32) for each. Also, the number of contacts of each switch (30, 32) may be increased or decreased as appropriate, and the type of switch used in the heating section (16) and the blower section (18) may be changed. The blower (18) includes a motor (40) and the motor (40).
And a fan (42) driven to rotate in the main body case (12). The first switch of the mode switch (22) is connected to the motor (40).
The commercial AC voltage input via the contact (28a) is
The full-wave rectified voltage is applied in 4), but the motor (40) is rotated at a low speed by applying a half-wave rectified voltage by the diode (46) in cold air and low-temperature air. Short-circuit both ends of (46) at the third contact (28c),
The motor (40) is configured to rotate at high speed. Note that a shock absorbing capacitor (48) is connected in parallel with the diode (46). The present invention further comprises a motor resistor (52) composed of two resistors (50a and 50b) in series with the rectifier (44), one of which is provided by a pressing switch (32) of a drive voltage changeover switch (24). Irrespective of the difference between the commercial AC voltage of 120 V and 240 V, a voltage having substantially the same peak value is applied to the rectifier (44), and the motor (40b) is driven under the same conditions. ) Is driven to rotate. As the motor resistance (52), a resistance wire wound in a coil shape is used, and a spiral is wound around the outer periphery of the motor (40) on a substrate (54) assembled in a cross shape in the main body case (12). It is arranged in a shape. The heating section (16) includes a heater (58) in which two resistance wires (56a and 56b) are wound in a coil shape, and a thermostat (60) for maintaining heat generated by the heater (58) at a set temperature or less. And a temperature fuse (62) that blows out when the temperature adjustment by the thermostat (60) is poor and forcibly stops energization to the blower section (18) and the heating section (16). The heater (58) connects two resistance wires (56a and 56b) having the same characteristics and the same length in series, and has a motor resistor (52) and a main body case opening on the substrate (54). (64)
In between, it is wound spirally in a series. Further, both ends of the first and second resistance wires (56a and 56b) are connected to a rotary switch (30), and two resistance wires (56a and 56b) are connected in series in conjunction with the switching operation of the switch (30). By making the connection changeable from the state to the parallel state, the resistance value is reduced to one-fourth of that in series, so that the blower is heated with substantially the same wattage when the power supply voltage is 120V or 240V. I have to. The above-described thermostat (60) includes two thermostats (60a and 60b) and a heater (5).
As shown in FIG. 2 or FIG. 4, they are connected in series in an energizing circuit for 8), and are separately arranged on both sides with a heater (58) interposed therebetween. There are also first and second temperature fuses (62). The first fuse (62a) is connected between the rectifier (44) and the mode switch (22), and the second fuse (62b) is connected to the rectifier. (Four
4) and the motor resistance (52)
Are arranged separately on both sides. With this configuration, if the temperature of the heater (58) becomes abnormally high when energized, the first thermal fuse (62a) is blown to stop the heating section (16) and the blowing section (18) at the same time. (40) If the motor (40) is overheated due to locked rotation, etc.
The thermal fuse (62b) is blown, and the power supply to the motor (40) is stopped. According to the present invention, as described above, the heater (58) is changed by changing the connection of two resistance wires (56a and 56b) having the same configuration in series or parallel in accordance with the difference in drive voltage. ) Can be maintained substantially the same regardless of the use conditions, and the non-uniformity of the air temperature when the hot air is blown can be eliminated as much as possible, and the safety device can operate stably. Current capacity and connection
Switches (30, 32) with different point types are linked and turned off
It is possible to replace multiple
If you need to switch the circuits at the same time,
A switch that can operate stably can be constructed at low cost.
It has many advantages. [0027]

BRIEF DESCRIPTION OF THE DRAWINGS FIG. 1 is an electric circuit diagram of a dryer. FIG. 2 is a central vertical sectional view showing the overall configuration of the dryer. FIG. 3 is a side view as viewed from the left in FIG. 2; FIG. 4 is an explanatory diagram showing an arrangement state of each component according to the present invention; [Description of Signs] (16) Heating part (18) Blower part (20) Switching part (22) Mode switch (24) Drive voltage switch (30) Rotary switch (32) Push switch (34) Operation knob (52 ) Motor resistance (56) Resistance wire (58) Heater

Claims (1)

(57) [Claims for Registering Utility Model] Heating section (16), blower section (18) for blowing air toward heating section (16), and energizing state for blower section (18) and heating section (16) And a switching unit (20) that can be manually changed. The heating unit (16) includes two resistance wires (56a and 56b) having substantially the same characteristics, each having substantially the same length. The switching section (20) includes a mode changeover switch (22) and a drive voltage changeover switch (24).
6), a contact for selectively connecting the two resistance wires (56a and 56b) in series or in parallel, and a blower (1).
8) a contact that enables the resistance value of the motor resistance (52) to be changed;
8) Energize or blow air only to (18) and heat generator (1)
The simultaneous energization and having a selectable contact to 6), the contact of the driving voltage selector switch (24) described above, another
Is composed of two independent switches (30 and 32),
The switches (30 and 32) further have both switches (30 and 32).
The operation knob (3) in which the contacts of 32) are switched in conjunction with each other
(4) A dryer characterized by being provided .