JPH07313237A - Dryer - Google Patents

Abstract

PURPOSE:To automatically control a heating part with precision while keeping a simple structure, and perform an air blowing excellent in stimulating effect to hair and head skin without loosing the hair drying or styling function. CONSTITUTION:A switching element 44 is interposed in series to a heater 34, and a temperature detecting element 51 consisting of a positive characteristic thermistor is connected to its control end 46. The temperature detecting element 51 is arranged close to the heater 34. When the air blowing temperature is lower than a preset lower limit temperature, a control signal is outputted to the switching element 44 to make the current-carrying to the heater 34 ON, and when the temperature exceeds an upper limit temperature, the control signal is stopped to make the current-carrying OFF.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a drier, and more particularly to a drier that blows air while intermittently repeating hot air and cold air.

[0002]

2. Description of the Related Art Heretofore, as a dryer of this type, there has been proposed a dryer provided with a timer for forcibly turning on / off a switch provided in a heater circuit at predetermined time intervals to intermittently energize a heater (for example, 62-2
70104).

[0003]

By the way, the applicant of the present invention has previously used a general air temperature of about 12 in a conventional dryer.
When the hair is continuously dried with warm air of 0 ° C., as shown by the alternate long and short dash line in FIG. 6, the amount of water in the hair, which was about 35% before drying, is about 7% after about 15 minutes. On the other hand, when the hair is continuously dried with a warm air of about 70 ° C., which is sufficiently lower than that, the water content is reduced as shown by the chain double-dashed line without significantly reducing the drying effect as a dryer. 1
It was found that it can be maintained at about 2%, and damage due to hair drying can be reduced as much as possible.

As a result of further research based on this finding, the present inventor has shown that the temperature change shown in FIG. 5 (b) is not the continuous hot air drying at a constant temperature as in the above drying. , 100 above 70 ° C
By using warm air with a large temperature change that repeatedly rises and falls in the temperature range of up to 50 ° C., FIG.
As shown by the solid line, the amount of water that can be retained in the hair can be further increased, and moderate stimulus is given by repeating hot and cold stimuli on the hair and scalp, and it is also effective for holding and growing hair. I found out.

The present invention has been made on the basis of the above-mentioned findings, and the driving timing of the heat generating portion is performed in conjunction with the detection of the upper and lower limit temperatures, so that the hair is not dried or the hair styling function is not impaired. It is intended to provide a dryer having an excellent effect of stimulating hair and scalp.

Further, according to the present invention, the heat generating portion is controlled by a temperature detecting member such as a thermistor whose resistance value changes in response to a temperature change and a switching element, thereby effectively maintaining a simple structure. It is an object of the present invention to provide a dryer capable of automatically controlling a heat generating part.

[0007]

In order to achieve the above object, a dryer according to the present invention has a heat generating portion 10 and a blower air blown toward the heat generating portion 10, as schematically shown in FIG. And a control unit 12 capable of intermittently switching between hot air and cold air by performing a predetermined control such as turning on and off an energization path for the heat generating unit 10, and the control unit 12 described above. It is characterized in that the timing of energization to the heat generating portion 10 is regulated in association with the detection of the upper limit temperature and the lower limit temperature in the vicinity of the heat generating portion 10.

The control unit 12 is provided in the vicinity of the heat generating unit 10 with a detection means 13 for generating a detection signal S1 corresponding to the blowing temperature, and the detection signal S1 from the detection means 13 is set as inputs. The control means 14 that outputs a predetermined control signal S2 when the upper limit temperature and the lower limit temperature are exceeded, and the energization timing for the heat generating part 10 that is interposed in the energizing circuit of the heat generating part 10 and is linked to the input of the control signal S2. It may be provided with a switching means 15 for on / off regulation.

As shown in FIG. 4, the control section 12 uses a switching element 44 for power control connected in series with the heat generating section 10 as a switching means 15, and is connected to a control end 46 of the switching element 44. Heating part 10
A temperature detecting element 51 whose resistance value changes in response to a temperature change, such as a positive temperature coefficient thermistor, disposed close to
It may be provided as the above-mentioned detection means 13 and control means 14.

Further, the control unit 12 uses the mode switch 1
It is possible to maintain a steady energization state of the heat generating portion 10 in conjunction with the operation of the heat generating portion 6. As shown in FIG. 8, the mode switch 16 may be switched in conjunction with the attachment operation of the attachment 53 that is detachably attached to the blower outlet 22.

The power supplied to the heat generating section 10 can be changed in a plurality of steps in conjunction with the switching operation of the main switch 17, or a display corresponding to the cold air / hot air switching operation by the control section 12 can be performed. It is possible to provide a display means 18 which is audible or visual. In that case,
The display means 18 includes a part of the heat generating part 10 in the energizing circuit for the air blowing part 11, and reduces the air blowing amount by reducing the voltage applied to the air blowing part 11 by about 10% while the heat generating part 10 is energized. Then, it is possible to make an acoustic change such that the reduction of the blown air amount can be identified by an audible sound.

[0012]

With the configuration described above, when the main switch 17 of the operation unit 23 is turned on, the commercial AC power supply 29 is applied to the blower unit 11, and the blower unit 11 starts blowing air to the heat generating unit 10. Here, when the mode switch 16 is in the continuous mode, the control unit 14 of the control unit 12 forcibly turns on the switching unit 15 and continuously supplies the commercial AC power supply 29 to the heat generating unit 10. As shown in FIG. 5A, after the temperature of the air blown at a position away from the air outlet 22 by a predetermined distance reaches the set temperature, the temperature is maintained and a constant warm air is sent.

Here, when the mode switch 16 is switched to the intermittent mode, the temperature of the warm air is detected by the detecting means 13, and when it is detected that the preset upper limit temperature is reached, it is sent from the control means 14 to the switching means 15. It is turned off by the control signal S2, and the blast temperature sharply drops. This decrease in temperature is detected by the detection means 13, and when it is detected that the lower limit temperature has been reached, the switching means 15 is turned on again, thereby switching the switching means 15 between the upper and lower limit temperatures as shown in FIG. 5B. The on / off operation is repeated, and the warm air and the cold air are intermittently repeated.

[0014]

As described above, according to the present invention, by controlling the driving timing of the heat generating portion 10 in conjunction with the detection of the upper and lower limit values of the blowing temperature, the hair and the scalp can be treated without impairing the hair drying or hair styling function. Can give effective stimulation to.

Further, the heating unit 10 is controlled by a temperature detecting member such as a thermistor provided as the temperature detecting element 51, the resistance value of which changes with temperature change, and the switching element 44, thereby maintaining a simple structure. However, the automatic control of the heat generating unit 10 can be effectively performed.

[0016]

EXAMPLE An example of carrying out the present invention on a portable hair dryer that exclusively blows air will be described below. A salon type dryer that completely surrounds the head, and a hair curling portion or a comb body at the blower outlet is provided. Needless to say, the present invention can be applied to various types of dryers regardless of whether they are portable or fixed, such as a roll brush type blower that is detachably attached.

As shown in FIGS. 2 and 3, the dryer according to the present invention has a handle 20 rotatably provided on the base end side of a substantially cylindrical main body case 19, and the main body case 1
Insulating substrate 21 is arranged inside 9 and outlet 22 on the front side is provided.
A heat generating unit 10 is provided in the vicinity, a blower unit 11 for blowing air toward the heat generating unit 10 and a control unit 12 for restricting the on / off timing of the heat generating unit 10 are arranged at the rear position, and various types of handles are provided in the handle 20. The operation unit 23 for performing the switching operation is provided.

As shown in FIG. 4, the operating section 23 is composed of a main switch 17 for switching the power source and a mode switch 16 for switching the operation mode. While the blowing state can be changed to three levels, cold air, weak warm air, and strong warm air, in conjunction with the operation of the mode switch 16, as will be described later in detail, the "continuous mode" when blowing warm air and The "intermittent mode" can be switched selectively.

The main switch 17 is a switch knob 24.
It is provided with first and second switches 25 and 26 which are simultaneously switched in conjunction with a three-step sliding operation in the vertical direction. Here, the first switch 25 includes the first to fourth contacts 2
7 is a switch that can selectively switch 7 by a movable contact 28, which is interposed in a common circuit of the heat generating portion 10 and the blower portion 11, and the movable contact 28 is commercialized via a power plug (not shown). While connected to the AC power supply 29, the diode 30 is connected in parallel to the second and third contacts 27b and 27c.

Therefore, at the lowermost position of the switch knob 24, the first contact 27a is kept in the off state, and every time the switch knob 24 is moved upward by one step, the contact position is sequentially turned on from the first contact 27a. Transition, second and third
At the switching position to the contacts 27b and 27c, the commercial AC power supply 2
9 is half-wave rectified by the diode 30 to reduce the supplied power to half, and the fourth contact 27d at the third slide position
The commercial alternating-current power supply 29 can be directly supplied to drive the circuit in the full power state.

On the other hand, the second switch 26 is interposed in the energizing circuit of the heat generating portion 10 and maintains the off state when the first switch 25 is switched to the first or second contact 27a / 27b, and the third and third switches 27a and 27b. In response to the switching to the four contact points 27c and 27d, the switch is turned on so that the heat generating portion 10 can be energized.

Insulating substrate 21 provided in main body case 19
Is provided with a cylindrical substrate 31 having a closed end extending in the longitudinal direction at the center thereof, and a substrate 32 having a cross-shaped cross section from the periphery of the cylindrical substrate 31 in the vertical and horizontal directions.
Is extended to reach the inner surface of the main body case 19, and four separate ventilation passages 33a, 33b, 33c, 33d are formed inside the main body case 19 by such a configuration.

The heat generating portion 10 is formed by spirally winding a heater 34 around the front half of the cross-shaped substrate 32. As the heater 34, a ribbon-shaped resistance wire bent in a waveform is used, and the main heater 34a having a length corresponding to the amount of heat to be generated is turned on and off by the second switch 26. 10 main circuits, main heater 3
A relatively short auxiliary heater 34b having a length of, for example, about 1/20 of that of 4a is interposed in each of the common circuits of the heat generating portion 10 and the blower portion 11 whose operating state is switched by the first switch 25.

Therefore, the voltage drop in the sub-heater 34b is small because the energization current is small while only the blower section 11 is energized, but the main heater 34a and the sub-heater 34b blow air while the energization section 10 is energized. The voltage applied to the portion 11 is divided to reduce it by about 3 to 15%. Then, while the heat generating unit 10 is being driven, the rotation speed of the motor 38 is lower than that when the heating unit 10 is stopped, and the amount of blown air is reduced. It is displayed sensuously to the operator.

Further, at both ends of the main heater 34a, the heat generating portion 1 is provided.
While connecting the first and second thermostats 35 and 36 for maintaining the heating of the blast by 0 below the set temperature, the first thermostat 35 is provided on the downstream side of the heat generating portion 10,
The second thermostats 36 are respectively provided on the upstream side to forcibly turn off the energization of the main heater 34a when the blowing temperature exceeds a preset temperature to prevent an abnormally high temperature.

Furthermore, in the vicinity of the second thermostat 36, it is connected between the sub heater 34b and the first switch 25, and when the temperature control by the thermostats 35 and 36 is not sufficient, the blowout occurs, and the blower section 11 and the heating section. By providing the thermal fuse 37 for forcibly stopping the energization of 10, the final safety is achieved.

The blower unit 11 is composed of a DC motor 38, a fan 40 fixed to a rotating shaft 39 of the motor 38, and a rectifying circuit 41 for applying a DC voltage to the motor 38. The DC motor 38 has the above-mentioned cylindrical substrate 31.
The rotary shaft 39 is stored in the rear end portion of the heat generating portion 10 so as to be thermally separated from the heat generating portion 10.
The fan 40 located at the upstream position constantly sends cool air to prevent overheating.

The rectifier circuit 41 is composed of a diode bridge 42 for full-wave rectifying the input voltage and a motor resistor 43, and can apply a predetermined DC voltage to the motor 38. Here, as the motor resistance 43, a resistance wire wound in a coil shape is used. By arranging the resistance wire in a spiral shape continuously with the heater 34 wound around the cross-shaped substrate 32, heat generated by the motor resistance 43 is generated. Is also used effectively for heating the blast.

The control unit 12 is connected in series with the main heater 34a in the heat generating unit 10 described above, and a switching element 44 for controlling on / off of energization of the heater 34.
And a control circuit 45 for controlling the on / off timing of the switching element 44.

As the switching element 44, a bidirectional semiconductor rectifying element such as a triac is used, and its energization path is interposed between the first thermostat 35 and the second switch 26 in the main switch 17 for power supply switching. On the other hand, the energization path is turned on in response to the time when the control signal is input from the control circuit 45 to the control end 46.

The control circuit 45 uses the above-mentioned second switch 2
During the period when 6 is turned on and the heat generating unit 10 can be driven,
Further, the continuous mode in which the hot air state is continued and the intermittent mode in which hot air and cold air are intermittently repeated can be selectively switched by the mode switch 16 provided on the back surface of the handle 20.

The mode switch 16 is composed of a push switch 47 fixed in the handle 20 and a switch knob 48 whose tip is exposed from the opening of the handle 20, and the switch contact is interlocked with the pushing operation of the switch knob 48. Switch direction and switch knob 4
By pushing 8 upward, the pushed state can be maintained.

The control circuit for the continuous mode has a resistor 49 and a diode 50 connected in series, one end of which is connected in series between the main heater 34a and the first thermostat 35, and the other end of which is the mode switch 16 Connected to.
Therefore, the control signal is applied to the control end 46 of the switching element 44 only in the half-wave period of the commercial AC power supply 29, and during the ON period of the heat generating portion 10, regardless of the switching position of the main switch 17. The heater 34 is designed to generate heat with half the electric power of full power.

On the other hand, the control circuit for the intermittent mode is provided with a thermistor having a positive characteristic as the temperature detecting element 51, and the heater 34 is provided in the main body case 19 in the vicinity of the air outlet 22 so as to be orthogonal to the blowing direction. Are arranged as close to each other as possible, one end is connected between the main heater 34a and the first thermostat 35, and the other end is connected to the mode switch 16.

Therefore, when the second switch 26 of the main switch 17 is turned on while the mode switch 16 is switched to the intermittent mode side, the temperature of the temperature detecting element 51 is low immediately after the second switch 26 is turned on and the resistance thereof is low. Since the value is also sufficiently low, a sufficiently large control signal is applied to the control end 46 of the switching element 44,
Is turned on for the entire period or a half cycle to continuously energize the heater 34. When the heater 34 is energized, the temperature of the temperature detecting element 51 is raised by its radiant heat, and when the temperature reaches a preset temperature, the resistance value of the temperature detecting element 51 rapidly increases. The applied control signal is reduced, the switching element 44 is turned off, and the power supply to the heater 34 is stopped.

By the way, the temperature of the air blown from the air outlet 22 of the main body case 19 when the heat generating portion 10 is continuously driven is as shown in FIG.
Immediately after the energization, the temperature rises abruptly but is gradually saturated, and when it reaches a temperature where the amount of air blown from the air blower unit 11 per unit time and the amount of heat generated in the heat generator 10 reach a balance, the temperature is maintained substantially. On the contrary, when the energization to the heater 34 is stopped in a state where the air blowing temperature reaches a predetermined value, the air blowing temperature rapidly decreases and reaches room temperature.

For example, in the continuous mode in this embodiment, the temperature when full power is supplied to the heater 34 of the heat generating portion 10 is about 130 degrees as indicated by the thin line.
The temperature is set so that the temperature when the half-wave rectified power is supplied is maintained at a constant temperature of about 70 degrees as indicated by the broken line.

On the other hand, in the intermittent mode, FIG.
As indicated by a thin line in FIG. 5, when the temperature of the wind is about 100 degrees which is increasing at full power in FIG. 5 (a), the heater 34 is stopped from being energized, and when it reaches about 50 degrees, the heater 34 is not energized. By setting the temperature so that it restarts, a time interval of about 4 seconds τ1 ・ τ2
The heater 34 is set to be repeatedly turned on and off.

Incidentally, the control operation in the intermittent mode described above is basically such that, as shown in FIG. 1, the temperature detecting means 13 is used to take out the signal S1 corresponding to the blast temperature and preset the detected temperature. The control signal S2 is sent to the switching means 15 in response to detecting that the temperature exceeds the lower limit temperature and the set temperature is exceeded, so that hot air and cold air can be automatically switched.

However, in the present embodiment, the hysteresis operation at the time of temperature detection using the thermistor as the temperature detecting means 13 is also used as the control means 14, so that the on / off control operation of the switching element 44 can be performed only by the thermistor. I am doing it.

That is, in the present embodiment, the temperature of the blown air is detected by the temperature detecting element 51 using a positive temperature coefficient thermistor, and the resistance value of the temperature detecting element 51 is a physical characteristic of this element. As a result of the sudden increase at the predetermined temperature, the control signal for the switching element 44 is stopped, the switching element 44 is turned off, and the power supply to the heater 34 is stopped.

At this time, since the temperature detecting element 51 has a predetermined heat capacity, there is a delay time from when the heater 34 is turned on or off until the temperature change of the thermistor actually occurs. Further, even if the heater 34 is turned off when the temperature rises, the temperature keeps rising for a while, and even if the heater 34 turns on when the temperature falls, the temperature keeps dropping. Therefore, the output of the control signal is controlled between the upper and lower two blowing temperatures by using this hysteresis operation, even though the temperature sensing element 51 turns on and off the output of the control signal by one. Of.

In order to provide a sufficiently large difference between the upper limit temperature and the lower limit temperature, it is necessary to set the mass of the temperature detecting element 51 to a certain degree. Therefore, in the present embodiment, two thermistors are connected in series to increase the heat capacity, and the variations in the temperature detecting element 51 itself can be averaged by both.

However, the rate of increase in the blast temperature immediately after the heater 34 is turned on is relatively large, whereas the rate of temperature increase of the thermistor provided as the temperature detecting element 51 decreases as the mass increases, and the temperature detection sensitivity decreases. If so, there is a possibility that the temperature may rise beyond the preset upper limit temperature.

Therefore, in the present embodiment, further, the heater 3
As shown in FIG. 3, the formation density of No. 4 is partially increased to set the detection position 52 in which the calorific value per unit area is partially increased, and the temperature detection is performed by sufficiently approaching the detection position 52. The element 51 is provided. With such a configuration, the detection sensitivity of the upper limit temperature as the temperature detecting element 51 is increased as much as possible while keeping the controllable upper and lower limit temperatures sufficiently large, and relatively accurate upper limit temperature control is performed. There is.

[0046]

[Other Embodiments] FIG. 7 is an electric circuit diagram similar to FIG. 4 showing another embodiment of the present invention. In any of the embodiments, by directly connecting the thermistor provided as the temperature detecting element 51 to the control end 46 of the switching element 44,
In the normal state, the heating unit 10 is intermittently driven, while the control terminal 46 is connected to the commercial AC power source 29 in parallel via the mode switch 16 and the resistor 49, and the temperature detecting element is used when switching to the continuous mode. The switching element 44 is continuously turned on regardless of the detection state of 51.

Further, in the above embodiment, even when the main switch 17 is switched to the third slide position in the continuous mode, it is the diode 30 that supplies the heat to the heating unit 10 to the commercial AC power supply 29. The air temperature rises only to about 70 ° C, which is limited to half a cycle. However, in FIG. 7, as a result of power being supplied to the heat generating portion 10 over the entire period, the air temperature rises up to around 120 ° C.
Further, in the embodiment of FIG. 7B, the air blower 11 is connected to the heat generator 10
Is electrically separated from the heat generating section 10, the air is always blown at full power during energization, and the first switch 25 side regulates the energization timing and supply power to the heat generating portion 10, while the second switch 26 side. The air blower 11 and the heat generator 10 are simultaneously turned on / off.

The air blower 11 and the heat generator 1 described above are used.
It is needless to say that the electric power supplied to 0, that is, the combination of the blown air amount and the heat generation amount is not limited to the above combination and can be arbitrarily changed and implemented. Also, the number of stages that can be switched can be increased or decreased. The supplied power may be phase-controlled so that it can be changed steplessly. Furthermore,
It is not limited to the type capable of switching between the continuous mode and the intermittent mode during warm air blowing, but may be the type having only the cold air mode and the intermittent mode, or the dryer having only the intermittent mode.

Further, a plurality of the above temperature detecting elements 51 are provided, which are connected in series or in parallel, and each element is separated from different positions, for example, a plurality of air passages 33 partitioned by the insulating substrate 21. By arranging them, it is possible to reduce variations in detection for each element 51. Further, the disposition direction of the temperature detecting element 51 can be changed not only orthogonal to the air blowing direction but also parallel or obliquely directed. In addition, the temperature detecting element 51 itself can use various temperature sensors such as a negative characteristic thermistor and a thermocouple instead of using the positive characteristic thermistor, and depending on the characteristics of each temperature detecting element 51,
A detection method such as separating from the heater 34 to detect radiant heat or contacting the heater 34 to detect conductive heat is appropriately selected.

Further, the switching between the continuous mode and the intermittent mode is not performed by switching the mode switch 16 provided separately on the handle 20, but the 1 in the main switch 17 is used.
The configuration of the switching means or switch, such as setting at one switching position, can be appropriately changed and implemented. For example, in FIG.
As illustrated in FIG. 3, a mode switch 16 in the form of an on / off switch is provided at the air outlet 22 of the air blower, and the mode switch 16 is forcibly turned on in conjunction with the attachment of a detachably attachable hood or attachment 53 such as a comb. It is also possible to do so.

Furthermore, the upper and lower limit temperatures for switching between hot air and cold air in the intermittent mode are set arbitrarily, and the values do not need to be fixed to a constant value, and one or both temperatures are manually set. You may be able to change with.

The means 18 for displaying the switching state between the hot air and the cold air in the intermittent mode is also the air blower 11 as described above.
In place of changing the rotation speed of the motor 38 in
Alternatively, in addition to the above, a device that generates sound such as a buzzer or voice synthesis to appeal to the hearing, or a unit that generates light such as LED or LCD to appeal to the eyes can be provided.

Further, the detection position 52 provided for increasing the detection sensitivity of the temperature detection element 51 is also the heater 3 as described above.
Instead of partially increasing the arrangement density of 4, the following method can be used in substantially the same manner.

For example, by arranging various control elements and components in a specific blower duct among the plurality of divided blower ducts 33 in a concentrated manner, the flow path resistance in the blower duct is reduced. By arranging the temperature detecting element 51 across the air passage while raising the temperature sufficiently, the amount of heat per unit area supplied to the temperature detecting element 51 is set in another air passage. It can be set larger than the case.

In addition, a ribbon-shaped or coil-shaped heater 34
Is provided in a plurality of rows along the air passage, and the periphery thereof is surrounded by the heaters 34. Detection positions 52 for disposing the temperature detection elements 51 are provided between the heaters, or the heaters 34 are formed into a honeycomb shape. It is also possible to configure the detection position 52 by using a ceramic heater and setting the size of the flow path smaller than other locations.

Further, as shown in FIG. 9, when the temperature detecting means 13 is used in a normal environment, the timer means 54 whose timer time is set to be slightly longer than the estimated time τ1 · τ2 required for the temperature detecting means 13 to detect the upper and lower limit temperatures is detected by the temperature detecting means 54. It can be arranged so that the count time is reset in association with the detection operation by the means 13. Here, if there is a malfunction in the detection of the upper and lower limit temperatures by the temperature detection means 13, the timer means 54 is turned off by the control output S3 which is issued from the timer means 54 after the temperature detection means 13. Can act as a protective function.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a basic configuration of the present invention.

FIG. 2 is a central vertical cross-sectional view showing the overall structure of a dryer.

FIG. 3 is an enlarged end view taken along line 3-3 in FIG.

FIG. 4 is an electric circuit of a dryer.

5 (a) and 5 (b) are explanatory views showing changes in the air temperature when driving the heat generating portion, in which (a) shows continuous operation and (b) shows intermittent operation.

FIG. 6 is an explanatory diagram showing the relationship between each operation mode of the dryer and the amount of water in the hair.

FIG. 7 is an electric circuit diagram showing another embodiment.

FIG. 8 is an explanatory diagram showing another embodiment of the mode switch.

FIG. 9 is a schematic view showing another embodiment of the control unit.

[Explanation of symbols]

 10 Heat generating part 11 Blower part 12 Control part 13 Detecting means 14 Control means 15 Switching means 16 Mode switch 17 Main switch 18 Display means 22 Air outlet 23 Operating part 25 First switch 26 Second switch 29 Commercial AC power supply 30 Diode 31 Cylindrical Substrate 32 Cross-shaped substrate 33 Ventilation path 34 Heater 38 Motor 40 Fan 43 Motor resistance 44 Switching element 45 Control circuit 46 Control end 47 Push switch 48 Switch knob 49 Resistance 50 Diode 51 Temperature detection element 52 Detection position 53 Attachment 54 Timer means

Claims (8)

[Claims] 1. A heat generating part (10), a blower part (11) for sending air toward the heat generating part (10), and an energization path for the heat generating part (10) are controlled to intermittently provide warm air and cold air. And a control unit (12) that can be switched, and the control unit (12) operates in conjunction with the detection of the upper limit temperature and the lower limit temperature in the vicinity of the heat generation unit (10).
A dryer characterized in that the power supply timing for 0) is regulated. 2. The control unit (12) is provided in the vicinity of the heat generating unit (10), and a detection unit (13) for generating a detection signal S1 corresponding to the blowing temperature, and the detection unit (13). The control means (14) which receives the detection signal S1 from the input terminal and outputs a predetermined control signal S2 when the preset upper limit temperature and the lower limit temperature are exceeded; Signal S2
2. The dryer according to claim 1, further comprising a switching means (15) for controlling ON / OFF of a timing of energizing the heat generating portion (10) in cooperation with the input of. 3. The control section (12) is connected to a switching element (44) for power control, which is connected in series with the heat generating section (10), and a control end (46) of the switching element (44). The dryer according to claim 1, further comprising: a temperature detecting element (51) which is disposed close to the heat generating portion (10) and whose resistance value changes in response to a temperature change. 4. The control unit (12) according to any one of claims 1 to 3, wherein the control unit (12) can maintain a steady energization state of the heat generating unit (10) in conjunction with a switching operation of a mode switch (16). Dryer described in. 5. The dryer according to claim 4, wherein the mode switch (16) is switched in conjunction with an attachment operation of an attachment detachably attached to the air outlet (22). 6. The dryer according to any one of claims 1 to 3, wherein the electric power supplied to the heat generating portion (10) can be changed in a plurality of steps in conjunction with the switching operation of the main switch (17). 7. A display means (18) which enables a display corresponding to a switching operation between cold air and warm air by the control section (12).
The dryer according to any one of claims 1 to 3, further comprising: 8. The display means (18) comprises a part of the heat generating part (10) in an energizing circuit for the air blowing part (11), and the air flow rate can be reduced while the heat generating part (10) is energized. The dryer according to claim 7, wherein the voltage applied to the blower unit (11) is reduced to such an extent that it can be discriminated as a change in the sound of hearing.