Hair dryers and motors

Abstract

To provide a hair drier and an electric motor which can efficiently radiate heat generated by a motor.SOLUTION: According to one embodiment, a hair drier is provided. The hair drier comprises a main body part, blowing means, and driving means. The main body part has a suction port provided on one end, and an exhaust port provided on the other end. The blowing means is provided in the main body part and can generate an air flow flowing from the suction port to the exhaust port in the main body part. The driving means has a motor and a frame, and by rotation of the motor, can drive the blowing means. The frame comprises a radiator. The radiator uses the air flow for radiating the heat generated on a coil of the motor.SELECTED DRAWING: Figure 4

Description

[Technical Field]

[0001] The present invention relates to a hair dryer and an electric motor. [Background technology]

[0002] A hair dryer with a large air volume generates a large amount of heat from its motor and its control circuit. For this reason, a technique has been proposed that allows the control circuit to efficiently dissipate heat (see, for example, Patent Document 1). [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Publication No. 2020-199019 Summary of the Invention [Problem to be solved by the invention]

[0004] However, there is also a demand for multi-functional hair dryers. If a hair dryer has multiple functions, it is likely that the user will move the hair dryer at various angles relative to their head. Therefore, in consideration of user convenience, it is desirable to make the hair dryer smaller.

[0005] On the other hand, when the hair dryer is made smaller, it becomes difficult to efficiently dissipate heat from the motor, etc., which is a problem.

[0006] SUMMARY OF THE INVENTION In view of the above circumstances, the present invention provides a hair dryer and an electric motor that can efficiently dissipate heat generated by the motor. [Means for solving the problem]

[0007] According to one aspect of the present invention, there is provided a hair dryer. The hair dryer comprises a main body, a blowing means, and a driving means. The main body has an air intake at one end and an exhaust at the other end. The blowing means is disposed within the main body and is configured to generate an air flow within the main body that flows from the air intake to the exhaust. The driving means comprises a motor and a frame and is configured to drive the blowing means by rotation of the motor. The frame comprises a heat sink. The heat sink is configured to use the air flow to dissipate heat generated in the motor windings.

[0008] According to one aspect of the present invention, heat generated by a motor can be efficiently dissipated, and the hair dryer can be easily made smaller. [Brief explanation of the drawings]

[0009] [Figure 1] FIG. 1 is a perspective view showing the appearance of a hair dryer 1. [Figure 2] FIG. 1 is a perspective view showing the appearance of a hair dryer 1. [Figure 3] FIG. 1 is a cross-sectional view of a hair dryer 1. [Figure 4] 3 is a perspective cross-sectional view of the blowing means 30 and the driving means 40. FIG. [Figure 5] FIG. 2 is a cross-sectional view of the intake port 11. [Figure 6] FIG. 2 is a perspective cross-sectional view of an exhaust port 12. [Figure 7] FIG. 2 is a diagram showing the cross-sectional shape of a flow path surface. [Figure 8] FIG. 2 is a diagram showing the cross-sectional shape of a flow path surface. [Figure 9] 10 is a diagram showing the direction of airflow curved toward the outer periphery of the exhaust port 12. FIG. [Figure 10] FIG. 2 is a cross-sectional view showing the vicinity of an exhaust port 12. [Figure 11] FIG. 2 is a perspective cross-sectional view showing the vicinity of an exhaust port 12. [Figure 12] FIG. 10 illustrates an example of an expansion unit. [Figure 13] FIG. 10 illustrates an example of an expansion unit. [Figure 14]FIG. 2 is a front view of the scalp moisture head 8. [Figure 15] FIG. 2 is a cross-sectional side view of the scalp moisture head 8. [Figure 16] FIG. 10 is a diagram showing the shape of a contact 812. [Figure 17] 10 is a diagram showing an example of control by an output control unit 61. FIG. [Figure 18] 10 is a diagram showing a method for starting the driving means 40 and the heating means 50 when the temperature inside the main body 10 is high. [Figure 19] 10 is a diagram showing a method for starting the driving means 40 and the heating means 50 when the temperature inside the main body 10 is medium. [Figure 20] 10 is a diagram showing a method for starting the driving means 40 and the heating means 50 when the temperature inside the main body 10 is low. [Figure 21] FIG. 1 is a diagram illustrating an example of a circuit configuration. [Figure 22] This is a diagram to explain the operation of the circuit shown in Figure 21. [Figure 23] FIG. 10 is a block diagram showing an example of the configuration of a function for discharging and collecting electric charges. DETAILED DESCRIPTION OF THE INVENTION

[0010] DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the accompanying drawings. Various features shown in the following embodiments can be combined with each other.

[0011] In this embodiment, the term "unit" may include, for example, a combination of hardware resources implemented by a circuit in the broad sense and software information processing that can be specifically realized by these hardware resources. Furthermore, various types of information are handled in this embodiment, and this information may be represented by, for example, physical values ​​of signal values ​​representing voltages and currents, high and low signal values ​​as a binary bit set consisting of 0 or 1, or quantum superposition (so-called quantum bits), and communication and calculations may be performed on the circuit in the broad sense.

[0012] In addition, a circuit in the broad sense is a circuit realized by at least appropriately combining a circuit, circuitry, a processor, a memory, etc. That is, it includes an application specific integrated circuit (ASIC), a programmable logic device (e.g., a simple programmable logic device (SPLD), a complex programmable logic device (CPLD), and a field programmable gate array (FPGA)), etc.

[0013] 1. Overall structure 1 and 2 are perspective views showing the appearance of the hair dryer 1, and Fig. 3 is a cross-sectional view of the hair dryer 1. The hair dryer 1 comprises a main body 10 and a grip 20. The main body 10 is cylindrical, with an air inlet 11 at one end and an air outlet 12 at the other end. In addition, an expansion means 13 and a light-emitting unit 14 are provided near the air outlet 12. The grip 20 is the part that is held by the user of the hair dryer 1, and is provided with a switch 21 and a hand electrode 22 that is part of the charge recovery means.

[0014] The hair dryer 1 is equipped inside with a blowing means 30, a driving means 40, a heating means 50, and a substrate 60. The substrate 60 is equipped with an output control section 61 which is an output control section, an ionizer 62 which is a charge discharging section, a charge state detection section 63 which is a charge state detection section, and a charge discharging control section 64 which is a charge discharging control section.

[0015] 2. Air blowing means and driving means Next, the blowing means 30 and the driving means 40 will be described. FIG. 4 is a perspective cross-sectional view of the blowing means 30 and the driving means 40. The blowing means 30 is disposed within the main body 10 and is configured to generate an airflow that flows from the air intake 11 to the air outlet 12 within the main body 10. The blowing means 30 is, for example, an impeller 31. The impeller 31 is made of, for example, magnesium or a magnesium alloy, which allows the impeller 31 to be relatively lightweight (the specific gravity of magnesium is 1.7 compared to the specific gravity of aluminum, 2.7), thereby reducing the weight of the hair dryer 1 and reducing abnormal vibration even if the balance is lost due to processing variations. In addition, the impeller is highly resistant to heat and time, and its rigidity and shape do not change, ensuring stable performance over the long term. This makes it easy to design a compact, high-speed impeller.

[0016] The driving means 40 includes a motor 41 and a frame 42, and is configured to be able to drive the blowing means 30 by the rotation of the motor 41. The motor 41 includes a stator 411, a rotor 412, a shaft 413, and a bearing 414. The stator 411 is a so-called stator and is configured to include, for example, a winding. A rotating magnetic field is generated around the rotor 412 by passing a current through the winding. The rotor 412 is a so-called rotor and is configured to include, for example, a permanent magnet. Because the rotor 412 includes a permanent magnet, it rotates around the shaft 413 in response to the rotating magnetic field. The shaft 413 is a rotating axis, and the bearing 414 supports the shaft 413 and reduces friction when the shaft 413 rotates.

[0017] The frame 42 includes an inner wall 421 , an outer wall 422 , and a heat sink 423 . Inner wall 421 contains motor 41 including windings (stator 411). Also, part of the airflow generated by blower means 30 may flow inside inner wall 421. Outer wall 422 is located outside inner wall 421, and the airflow generated by blower means 30 flows between inner wall 421 and outer wall 422. When the airflow flows inside inner wall 421, the airflow flowing between inner wall 421 and outer wall 422 is also part of the airflow generated by blower means 30.

[0018] Heat sink 423 is disposed between inner wall 421 and outer wall 422, connects inner wall 421 and outer wall 422 to support outer wall 422, and is configured to be able to dissipate heat generated in the motor windings using airflow. For this reason, heat sink 423 is desirably made of aluminum or an aluminum alloy, and may be molded integrally with inner wall 421 and outer wall 422. Heat sink 423 may be in the shape of a plate whose surface is parallel to the direction of airflow, or may have a shape that acts as a diffuser vane that adjusts the flow of airflow.

[0019] The heat generated in the motor 41 is dissipated by the heat sink 423, and the airflow is preheated. This facilitates a design that is small, lightweight, and consumes little power.

[0020] 3.Air intake Next, the air intake 11 will be described. FIG. 5 is a cross-sectional view of the air intake 11. As shown in the figure, the air intake 11 has a shape in which the cross section of the air flow path 111 changes continuously. This shape is similar to that of a funnel or a squib, and adjusts the flow of air flowing from the outside to the inside of the main body 10. Specifically, the air flow path 111 is formed so that the diameter is larger on the outside side of the main body 10 and smaller on the blower means 30 side.

[0021] 4. Exhaust port Next, the exhaust port 12 will be described. Fig. 6 is a perspective cross-sectional view of the exhaust port 12. As shown in the figure, the exhaust port 12 has a plurality of air outlets 121. The air outlets 121 have a shape in which the flow path of the airflow is continuously narrowed and then continuously widened.

[0022] Here, the airflow path in the air outlet 121 will be described. FIGS. 7 and 8 are diagrams showing the cross-sectional shape of the path surface. As shown in FIG. 7, the air outlet 121 has path surface 122a and path surface 122b. Further, path surface 122a includes inclined surfaces 123a and 124a, and path surface 122b includes inclined surfaces 123b and 124b. Arrow A in the figure indicates the direction of the airflow. Sloped surfaces 123a and 123b gradually narrow the airflow path, while inclined surfaces 124a and 124b gradually widen the airflow path. Furthermore, as shown in FIG. 8, the air outlet 121 may be configured to have path surface 122c and path surface 122d, and path surface 122c includes inclined surfaces 123c and 124c. Therefore, the flow path surface 122c is longer than the flow path surface 122d and is configured at a gentler angle.

[0023] Configuring air outlet 121 in this way, that is, gradually narrowing the airflow path, increases the wind speed of the airflow, and then widening the path makes it possible to spread the air blown out from air outlet 121. Increasing the wind speed of the air blown out from air outlet 121 makes it possible to make the air reach the roots of the hair for drying, and spreading the air makes it possible to blow the air softly onto the hair, preventing tangling of the hair.

[0024] Furthermore, in order to spread the air blown out from air outlet 121, air outlet 121 may have a shape that curves the direction of the air flow toward the outer periphery of exhaust port 12. In this case, the direction of the air flow is the direction indicated by arrow B in Fig. 9. Fig. 9 is a diagram showing the direction of the air flow curved toward the outer periphery of exhaust port 12.

[0025] 5. Light-emitting part Next, the light-emitting unit 14 will be described. FIG. 10 is a cross-sectional view showing the vicinity of the exhaust port 12, and FIG. 11 is a perspective cross-sectional view showing the vicinity of the exhaust port 12. As shown in FIGS. 10 and 11, the light-emitting unit 14 includes a plurality of light sources 141. The light sources 141 are, for example, LEDs (light emitting diodes). In other words, the hair dryer 1 includes a plurality of light sources 141. The light sources 141 are disposed on the outer periphery of the exhaust port 12 at positions that do not interfere with the airflow path. The light sources 141 are disposed at positions that do not interfere with the airflow path in order to prevent the light sources 141 from being heated by the airflow and to prevent turbulence in the airflow. Furthermore, since the light sources 141 can be brought closer to the scalp and hair, it is expected that the cosmetic effect of light can be enhanced.

[0026] A cover 142 is provided on the side where light is emitted from light source 141. This cover 142 can also be made to have a function similar to that of a collimator that diffuses the light emitted from light source 141 or converts the light into parallel light. Light source 141 includes a first light source that emits red light and a second light source that emits infrared light.

[0027] 6. Expansion means and expansion units Next, the expansion means 13 will be described. The expansion means 13 is configured so that an expansion unit can be attached. Examples of expansion units that can be attached to the expansion means 13 include the hair setting nozzle 7 shown in Fig. 12 and the scalp moisture head 8 shown in Fig. 13. Figs. 12 and 13 are diagrams showing examples of expansion units.

[0028] The hair styling nozzle 7 is an expansion unit useful for styling hair and has the function of concentrating the air blown out from the exhaust port 12. The scalp moisture head 8 is an expansion unit that applies vibration and electrical stimulation to the scalp. This scalp moisture head 8 applies at least one of voltage, heat, vibration, visible light, and infrared light to the scalp or facial skin based on the power supplied via the expansion means 13. The scalp moisture head 8 can be used not only on the scalp but also on facial skin, etc., and is capable of applying vibration, electrical stimulation, and light stimulation to facial skin, etc.

[0029] Here, the scalp moisture head 8 will be described. FIG. 14 is a front view of the scalp moisture head 8, and FIG. 15 is a cross-sectional view of the side of the scalp moisture head 8. Note that, here, the scalp moisture head 8 has a surface that contacts the skin of the scalp, face, etc., as the front. As shown in FIGS. 14 and 15, the scalp moisture head 8 has a strong vibration region 81, a weak vibration region 82, and ventilation holes 83. The scalp moisture head 8 also has a light guide unit 85. The light guide unit 85 has a light entrance surface 851 and a light exit surface 852, and guides visible light or infrared light that is incident from the light entrance surface 851 and irradiated from the light source 141, and emits the light from the light exit surface 852 to irradiate the scalp or facial skin.

[0030] The strong vibration area 81 is the surface that faces the skin of the scalp, face, etc., and is the part that applies vibrations to the scalp. The strong vibration area 81 is provided with a protrusion 811. The protrusion 811 has a contact 812 made of a conductive material such as silicon or metal at its tip, and vibrates in response to the operation of the vibration unit 813. When the human body touches the contact 812 and the hand electrode 22, a closed circuit including the human body is formed, and the current supplied from the hair dryer 1 can be applied to the human body. The vibration unit 813 includes a motor, etc., and vibrates when power is supplied from the hair dryer 1. Note that the contact 812 may be divided into a positive electrode and a negative electrode, and current may be applied to the human body without using the hand electrode 22.

[0031] The weak vibration region 82 is the surface that faces the skin of the scalp, face, etc., and is provided with a protrusion 821. This protrusion 821 protrudes further toward the scalp than the protrusion 811. Furthermore, the weak vibration region 82 vibrates in response to the operation of the vibration unit 813, but the vibration is weaker than the vibration of the strong vibration region 81.

[0032] The ventilation hole 83 is a portion through which the airflow exhausted from the exhaust port 12 passes. This ventilation hole 83 may have a plurality of holes in the center or around it, so as to ensure the same area as the air outlet 121.

[0033] Moreover, the strong vibration region 81 and the weak vibration region 82 are connected by a connection portion 84. This connection portion 84 transmits the vibration of the strong vibration region 81 to the weak vibration region 82 and holds the strong vibration region 81 so that it can vibrate freely, and the number of connection portions 84 is preferably three.

[0034] Furthermore, the protrusions 811 in the strong vibration region 81 and the protrusions 821 in the weak vibration region 82 have different heights, as shown by arrows D and D' in FIG. 15. This height difference is, for example, 1 mm. Of course, the height difference may be 0.8 mm, 0.9 mm, 1.1 mm, or 1.2 mm, or may be within a range between any two of the values ​​exemplified here (including 1.0 mm). In this way, the protrusions 821 in the weak vibration region 82 are longer than the protrusions 811 in the strong vibration region 81. Therefore, when the scalp moisture head 8 is placed against the scalp or face, the protrusions 821 face the skin surface like a pillar, and the strong vibration region 81 vibrates, causing the protrusions 811 to provide a moderate stimulation to the skin.

[0035] Furthermore, by configuring the connection parts 84 with an elastic material, the strong vibration region 81 taps the skin with an appropriate amplitude. For this reason, if the number of connection parts 84 is four or more, the amplitude of vibration of the strong vibration region 81 will be small, and if the number of connection parts 84 is two or less, the left and right shaking will be severe, so it is desirable that the number of connection parts 84 is three, and the skin will be tapped with an appropriate amplitude of vibration.

[0036] Next, the contact 812 provided on the protrusion 811 will be described. FIG. 16 is a diagram showing the shape of the contact 812. As shown in the figure, the contact 812 has a hemispherical shape. If the radius is small, the contact can easily separate hairs and contact the scalp. If the radius is large, the contact area with the scalp is large, and the application area when an electrical stimulus is applied is also large, allowing for a softer stimulus to be applied. The size of this hemisphere is, for example, a radius of 1.10 mm. The radius of the hemisphere may also be 1.00 mm, 1.05 mm, 1.15 mm, 1.20 mm, etc., or may be within a range between any two of the values ​​exemplified here (including 1.10 mm). Note that when the scalp moisture head 8 is used exclusively for skin such as the face, the contact 812 can also be a hemisphere with a radius of approximately 1.5 mm. This is because the preferred size differs depending on whether or not there is hair.

[0037] 7. Output control section Next, the output control unit 61 will be described. The output control unit 61, which is an output control means, is configured to control the driving means 40 and the heating means 50 and change the flow rate and temperature of the air flow. The heating means 50 is configured to be able to heat the air flow. Furthermore, the output control unit 61 makes at least one of the flow rate and temperature of the air flow different between a state in which an expansion unit is not attached to the expansion means 13 and a state in which an expansion unit is attached to the expansion means 13. For example, when a scalp moisture head 8 is attached as the expansion unit, the output control unit 61 controls the flow rate and temperature of the air flow as shown in FIG. 17.

[0038] 17 is a diagram showing an example of control by the output control unit 61. In the example shown in the figure, when the scalp moisture head 8 is not attached, the output control unit 61 sets the temperature to 60°C when the air volume (represented by the rotation speed of the air blowing unit 30) is 103,000 rpm, 80°C when the air volume is 70,000 rpm, and 50°C when the air volume is 55,000 rpm, or keeps the temperature at room temperature, i.e., changes only the air volume without heating by the heating unit 50. The output control unit 61 may also change the flow rate and temperature of the air flow depending on whether the scalp moisture head 8, which is an extension unit, is used on the scalp or on facial skin. Specifically, when the scalp moisture head 8 is attached and operated in a head mode targeting the scalp, heating is performed at an air volume of 28,000 rpm to a temperature of 50°C, and when the scalp moisture head 8 is attached and operated in a face mode targeting the skin of the face or the like, heating is performed at an air volume of 14,000 rpm to a temperature of 39°C, and an air volume of 14,000 rpm is an air volume that results in an air velocity of 17 m / s. Note that the temperatures and air volumes shown here are merely examples, and for example, when the scalp moisture head 8 is attached and operated in a face mode, the temperature may be any temperature between about 35°C and 50°C.

[0039] The output control unit 61 is also configured to control the activation order of the driving means 40 and the heating means 50 according to the temperature inside the main body 10. In this case, the output control unit 61 may operate the heating means 50 intermittently. Specifically, a first threshold and a second threshold are set for the temperature inside the main body 10, and the temperature inside the main body 10 is determined to be high if it is equal to or higher than the first threshold, medium if it is equal to or higher than the second threshold but lower than the first threshold, and low if it is lower than the second threshold, and the driving means 40 and the heating means 50 are activated in different ways for each. For example, the first threshold is 65°C, and the second threshold is 30°C. The temperature inside the main body 10 is measured, for example, by a thermistor (not shown) disposed in the output control unit 61.

[0040] Figure 18 is a diagram showing a method for starting the driving means 40 and the heating means 50 when the temperature inside the main body 10 is high, Figure 19 is a diagram showing a method for starting the driving means 40 and the heating means 50 when the temperature inside the main body 10 is medium, and Figure 20 is a diagram showing a method for starting the driving means 40 and the heating means 50 when the temperature inside the main body 10 is low.

[0041] If the temperature inside the main body 10 is high, when the switch 21 is operated at time t0, the output control unit 61 first operates the drive means 40 to start blowing air. At this time, the heating means 50 is not operated. By only blowing air, the inside of the main body 10 is cooled. Then, after a certain time, at time t1, the heating means 50 is operated to exhaust hot air. Note that time t1 may be a different value depending on the temperature inside the main body 10, or the time when the temperature inside the main body 10 is measured and has dropped to a predetermined temperature may be set to time t1.

[0042] When the temperature inside the main body 10 is medium, and the switch 21 is operated at time t0, the output control unit 61 operates the drive unit 40 to start blowing air and operates the heating unit 50 intermittently. Heating by the heating unit 50 is performed at approximately 90% of the rated power, for example, by adjusting the duty ratio. Then, after a certain time, at time t2, the heating unit 50 operates normally. Note that time t2 may be a different value depending on the temperature inside the main body 10, and time t1 may be set to a time corresponding to the temperature inside the main body 10. This makes it possible to prevent excessive heating at startup.

[0043] If the temperature inside the main body 10 is low, when the switch 21 is operated at time t0, the output control unit 61 first activates the heating means 50. At this time, the driving means 40 is not activated. Then, after a certain time, at time t3, the driving means 40 is activated to exhaust hot air. This prevents the user of the hair dryer 1 from feeling uncomfortable due to the exhaustion of cold air at startup.

[0044] Hair dryers are often designed to dry hair as quickly as possible. For this reason, the motor speed and heater output are often set to a medium-temperature, high-speed mode to maximize heat output (e.g., 1000 W) at maximum airflow, and then a high-temperature, medium-speed mode is set by lowering the motor speed and increasing the air temperature while maintaining the same heater output. In recent years, there has been a demand for low-temperature, high-speed air dryers that do not damage hair or the scalp. Therefore, some dryers have been designed with a lower heater output (e.g., 900 W) and a low-temperature, high-speed mode (e.g., 60°C), and then with the same heater output, the motor speed is lowered to set the medium-temperature, medium-speed mode.

[0045] However, the medium temperature / medium air speed mode does not provide the high temperature (e.g., 80°C) required to smooth out hair frizz, so hair dryers have been developed that further increase the rated heater output (e.g., 1200W) and allow for flexible combinations of heater output (e.g., three levels) and motor rotation speed (e.g., three levels).In this case, operating at maximum heater output (1200W) and maximum motor rotation can cause excessive drying of the hair and scalp, leading to scalp problems.

[0046] For this reason, the blowing means 30 of the hair dryer 1 is configured to be able to adjust the airflow rate in multiple stages, and the heating means 50 is configured to be able to heat the airflow temperature in multiple stages, so that when the airflow rate is maximum, the airflow temperature cannot be heated to the maximum. For simplicity's sake, let's assume that the blowing means 30 can adjust the airflow rate in two stages, high and low, and the heating means 50 can heat the airflow temperature in two stages, high and low. When the airflow rate is high, the heating means 50 only heats the airflow to a low temperature. The heating means 50 adjusts the temperature by adjusting the duty ratio, for example, from time t0 to time t2 as shown in Figure 19.

[0047] The hair dryer 1 may be provided with the following switch to adjust the heating temperature of the airflow generated by the heating means 50. This switch is configured to be able to indicate the amount of airflow and the temperature of the airflow, and when the amount of airflow is instructed to be large, the temperature of the airflow can only be instructed to be low.

[0048] Here, an example of a circuit that uses a switch to adjust the temperature of a heater corresponding to heating means 50 will be described. Fig. 21 is a diagram showing an example of the circuit configuration, and Fig. 22 is a diagram for explaining the operation of the circuit shown in Fig. 21.

[0049] The circuit shown in Figure 21 includes a power supply P, a motor M, heaters R1, R2, and R3, diodes D1 and D2, and switches SW1 and SW2. Power supply P corresponds to a commercial power supply. Motor M includes a brushless motor and its controller. The controller converts the voltage applied between terminals L and N into DC or three-phase AC to drive the brushless motor. It controls the rotation speed of the brushless motor according to the voltage input to terminals S1 and S2. Heaters R1, R2, and R3 heat the airflow and are equivalent to resistors in an electrical circuit. Diodes D1 and D2 limit the flow of current. Switch SW1 can be represented as having three internal switches—SW11, SW12, and SW13—to control the volume and temperature of the airflow. Switch SW2 controls whether or not the airflow is heated.

[0050] When switch SW11 is closed, a half-wave current flows through the heaters R1 and R2 via the diode D1, and a full-wave voltage is applied to the terminal S2 of the motor M. However, when switch SW2 is open, no current flows through the heaters R1 and R2.

[0051] When switch SW12 is closed, a full-wave current flows through heaters R1 and R2, and a half-wave voltage is applied to terminal S2 of motor M. However, when switch SW2 is open, no current flows through heaters R1 and R2.

[0052] When switch SW13 is closed, a full-wave current flows through heater R3 and a half-wave voltage is applied to terminal S1 of motor M. However, when switch SW2 is open, no current flows through heater R3.

[0053] Switch SW1 can be switched to Off, Set, Dry, or Turbo. When switch SW1 is Off, switches SW11, SW12, and SW13 are all open (Off), and motor M, heaters R1, R2, and R3 are all stopped. When switch SW1 is Set, switches SW11 and SW12 are open, and switch SW13 is closed. This applies a half-wave voltage to terminal S1 of motor M, and a full-wave current flows through heater R3.

[0054] When switch SW1 is in Dry mode, switch SW11 is open, and switches SW12 and SW13 are closed. This applies a half-wave voltage to terminals S1 and S2 of motor M, and a full-wave current flows through heaters R1, R2, and R3. When switch SW1 is in Turbo mode, switch SW11 is closed, switch SW12 is open, and switch SW13 is closed. This applies a half-wave voltage to terminal S1 of motor M, and a full-wave voltage to terminal S2. Also, a half-wave current flows through heaters R1 and R2, and a full-wave current flows through heater R3.

[0055] As a result, when switch SW1 is set to Set, the temperature is 50°C, the airflow is 55,000 rpm, and the power is 400W; when switch SW1 is set to Dry, the temperature is 80°C, the airflow is 70,000 rpm, and the power is 1100W; and when switch SW1 is set to Turbo, the temperature is 60°C, the airflow is 103,000 rpm, and the power is 770W.

[0056] 8. Charge release and recovery Next, a description will be given of the discharge of electric charge by the ionizer 62 and the collection of electric charge by the hand electrode 22. Fig. 23 is a block diagram showing an example of the configuration of the function for discharging and collecting electric charge.

[0057] As shown in the figure, the ionizer 62, which serves as a charge release means, includes a positive ion generator 621 that generates positive ions and a negative ion generator 622 that generates negative ions, and is configured to generate positive and negative ions simultaneously or alternately. The charge recovery means includes a hand electrode 22 that comes into contact with the user. The hand electrode 22 is connected to a potential control unit 65, which controls the potential of the hand electrode 22. The potential control unit 65 can control the potential of the hand electrode 22, for example, by applying a ground potential to the hand electrode 22. This allows the hand electrode 22 to recover negative charges when a large number of negative ions are accumulated in the hair, and recover positive charges when a large number of positive ions are accumulated. This allows for quick static removal from the hair, and also provides secondary benefits, such as increased moisture, from the negative ions. It is desirable for the potential control unit 65 to be insulated from the commercial power source.

[0058] It is also possible to provide a charge state detection unit 63, which is charge state detection means, and a charge release control unit 64, which is charge release control means. The charge state detection unit 63 is configured to be able to detect the charge state of the user. The charge release control unit 64 controls the amount of at least one of the positive ions and negative ions released by the ionizer 62 so that the charge state of the user becomes a predetermined state.

[0059] 9.Other The present invention may be provided in the following aspects. In the hair dryer, the heat sink is made of aluminum or an aluminum alloy. In the hair dryer, the frame has an inner wall and an outer wall, and the heat sink is disposed between the inner wall and the outer wall. In the hair dryer, the heat dissipating body is a diffuser vane that adjusts the flow of the air. In the hair dryer, the inner wall contains the winding, and a part of the air flows inside the inner wall. In the hair dryer, the air blowing means is an impeller made of magnesium or a magnesium alloy. In the hair dryer, the exhaust port has a plurality of air outlets, and the air outlets have a shape that continuously narrows and then continuously widens the flow path of the air flow. In the hair dryer, the air outlet has a shape that curves the direction of the air flow toward the outer periphery of the exhaust port. The hair dryer is provided with an expansion means, the expansion means being configured to be able to attach an expansion unit, and the expansion unit applying at least one of voltage, heat, vibration, visible light, and infrared light to the scalp or facial skin based on power supplied via the expansion means. The hair dryer is equipped with a heating means and an output control means, wherein the heating means is configured to heat the air flow, the output control means is configured to control the driving means and the heating means and to change the flow rate and temperature of the air flow, and the output control means makes at least one of the flow rate and temperature of the air flow different between a state in which the expansion unit is not attached to the expansion means and a state in which the expansion unit is attached to the expansion means. In the hair dryer, the output control means is configured to be able to change the flow rate and temperature of the air flow depending on whether the expansion unit is used on the scalp or on facial skin. The hair dryer is provided with a heating means and an output control means, wherein the heating means is configured to be able to heat the air flow, and the output control means is configured to be able to control the activation order of the driving means and the heating means according to the temperature inside the main body. In the hair dryer, the output control means operates the heating means intermittently. The hair dryer is provided with a heating means, the blowing means being configured to be able to adjust the flow rate of the air flow in multiple stages, and the heating means being configured to be able to heat the temperature of the air flow in multiple stages, so that when the flow rate of the air flow is at its maximum, the temperature of the air flow cannot be heated to its maximum. In the hair dryer, the blowing means is configured to be able to adjust the flow rate of the air flow in two stages, large and small, and the heating means is configured to be able to heat the temperature of the air flow in two stages, high and low, so that when the flow rate of the air flow is large, the hair dryer only heats the temperature of the air flow to low. The hair dryer is provided with a switch, which is configured to be able to indicate the amount of air flow and the temperature of the air, and when the amount of air flow is instructed to be large, the hair dryer can only instruct the temperature of the air to be low. The hair dryer is provided with a charge discharging means and a charge recovering means, the charge discharging means being configured to generate positive ions and negative ions simultaneously or alternately, and the charge recovering means including an electrode that comes into contact with a user and a potential control means that controls the potential of the electrode. The hair dryer is provided with a charge state detection means and a charge release control means, wherein the charge state detection means is configured to be able to detect the charge state of the user, and the charge release control means controls the amount of at least one of positive ions and negative ions released by the charge release means so that the charge state of the user is kept at a predetermined state. The hair dryer includes a plurality of light sources, the light sources being disposed on the outer periphery of the exhaust port at positions that do not interfere with the flow path of the airflow. In the hair dryer, the light source includes a first light source that emits red light and a second light source that emits infrared light. In the hair dryer, the air intake has a shape in which the cross section of the air flow path changes continuously. An electric motor comprising a winding and a frame, the frame comprising an inner wall, an outer wall, and a heat sink, the heat sink being disposed between the inner wall and the outer wall and configured to dissipate heat generated in the winding. In the electric motor, the heat sink is made of aluminum or an aluminum alloy. Of course, this is not the case. [Explanation of symbols]

[0060] 1: Hair dryer 7: Hair setting nozzle 8: Scalp Moisture Head 10: Main body 11: Air intake 12: Exhaust port 13: Expansion methods 14: Light-emitting part 20: Grip part 21: Switch 22: Hand electrode 30: Air blowing means 31: Impeller 40: Driving means 41: Motor 42: Frame 50: Heating means 55: Air volume 60: Substrate 61: Output control section 62: Ionizer 63: Charged state detection unit 64: Charge emission control section 65: Potential control section 81: Strong vibration region 82: Weak vibration region 83: Ventilation hole 84: Connection 85: Light guide section 95: Air volume 111: Flow path 121: Air outlet 122a: Channel surface 122b: Channel surface 122c: Channel surface 122d: Channel surface 123a: Slope 123b: Slope 123c: Slope 124a: Slope 124b: Slope 124c: Slope 141 :Light source 142: Cover 411: Stator 412: Rotor 413: Shaft 414: Bearing 421 :Inner wall 422: Exterior wall 423: Heat sink 621: Positive ion generating unit 622: Negative ion generator 811 : Protrusion 812: Contact 813: Vibration part 821 : Protrusion 851: Light entrance surface 852 :Idemitsu surface D1: Diode D2: Diode L:Terminal M: Motor N:Terminal P:Power supply R1: Heater R2: Heater R3: Heater S1: Terminal S2:Terminal SW1: Switch SW11: Switch SW12: Switch SW13: Switch SW2: Switch

Claims

1. A hair dryer, comprising: The device comprises a main body, a blowing means, and an expansion means, The main body has an intake port and an exhaust port, the air blowing means is disposed within the main body portion and is configured to be capable of generating an air flow that flows from the air intake port to the air exhaust port within the main body portion; The expansion unit is configured to be able to mount an expansion unit, The hair dryer comprises: Power is supplied to the expansion unit via the expansion means to stimulate the skin, The same expansion unit attached to the expansion means is configured to be switchable between a first mode and a second mode, In the first mode, the stimulation and the airflow are applied to the scalp, In the second mode, the stimulation and the airflow set to have a lower flow rate and temperature than in the first mode are applied to the facial skin. Hair dryer.

2. 2. The hair dryer according to claim 1, The hair dryer supplies power to the expansion unit through the expansion means, causing the expansion unit to apply at least one of voltage, heat, vibration, visible light, and infrared light to the skin as the stimulus. Hair dryer.

3. 3. The hair dryer according to claim 2, The hair dryer supplies power to a motor of the expansion unit through the expansion means, causing the expansion unit to apply at least vibration to the skin as the stimulus. Hair dryer.

4. A hair dryer set, comprising: A hair dryer comprising the hair dryer according to any one of claims 1 to 3 and the expansion unit. Hair dryer set.

5. 5. The hair dryer set according to claim 4, The hair dryer is configured to vibrate at least a portion of the hair dryer by power supplied from the hair dryer, thereby applying the stimulation to the skin. Hair dryer set.

6. 6. The hair dryer set according to claim 5, The expansion unit is a strong vibration region, a weak vibration region, and a connecting portion that connects the strong vibration region and the weak vibration region and is made of an elastic member; The strong vibration area is vibrated by the power supplied from the hair dryer. Hair dryer set.

7. 7. The hair dryer set according to claim 6, The expansion unit is configured to transmit vibrations of the strong vibration region, which is vibrated by the power supplied from the hair dryer, to the weak vibration region via the connection portion, thereby vibrating the weak vibration region as well. Hair dryer set.

8. The hair dryer set according to claim 6 or 7, the weak vibration region is disposed outside the strong vibration region via the connection portion, A gap is provided between the weak vibration region and the strong vibration region, and the airflow flowing out from the exhaust port is configured to pass through the gap. Hair dryer set.

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