TW202220579A - Hair dryer - Google Patents

Abstract

The object of the present invention is to provide a hair dryer capable of efficiently generating far infrared rays and excellently drying hair. The hair dryer includes a blowing mechanism, which is provided in the vicinity of an air intake part in the main body having the air intake part and an air exhaust part; an airflow heating mechanism provided on a downstream side of the blowing mechanism; and a far-infrared radiator, which is fixed to the air exhaust part and allows the airflow to pass through. In the hair dryer, the far-infrared radiator is in a short cylindrical shape with a central axis. The central axis is parallel to the airflow passing through the far-infrared radiator. The far-infrared radiator has a annular main body part and a vent hole part provided on the inner side of the main body part. An end part of the heater on the air exhaust part side faces a rear surface, so that an end face on the upstream side of the annular main body part, that is, the rear surface is heated by the radiant heat from the heater constituting the airflow heating mechanism. Thereby, the far-infrared radiator can be efficiently heated to emit far-infrared rays, and the hair can be dried well.

Description

hair dryer

The present invention relates to a hair dryer that dries wet hair with heat from a heater and far infrared rays from a far infrared ray radiator.

Conventionally, as such a hair dryer, a hair dryer has been known (for example, refer to Patent Document 1), and the hair dryer includes a main body portion, an air outlet (corresponding to the exhaust portion of the present invention) at the front end, and an air blower at the opposite side. The air intake part; the blower fan (equivalent to the air blower mechanism of the present invention) is built in the vicinity of the air intake part of the body part; A passage; and a grid-shaped far-infrared generating member (corresponding to the far-infrared radiator of the present invention) is disposed on the air outlet side with respect to the heat generating portion, and has a plurality of ventilation holes. In addition, in such a hair dryer, the width of the lattice is thin, and the opening area of the ventilation port is large, so as not to obstruct the flow of the airflow. prior art literature Patent Literature

Patent Document 1: Japanese Patent Laid-Open No. 6053906

The problem to be solved by the invention

However, in such a hair dryer, since the far-infrared radiator is constituted by a narrow lattice, the heating efficiency of the airflow heating mechanism is low, and the radiation efficiency of far-infrared rays is low. This is because in order to prevent the far-infrared radiator from obstructing the flow of the air flow, the width of the lattice is thin, and the opening area of the ventilation port is large, so that the end surface area thereof becomes relatively small. In addition, since most of the heat radiated from the airflow heating means is directly released to the outside through the vent, the heating efficiency of the far-infrared radiator of the airflow heating means is also poor.

An object of the present invention is to solve the above problems, and to provide a hair dryer that can efficiently generate far infrared rays and satisfactorily dry wet hair. means of solving problems

The hair dryer described in claim 1 of the present invention includes: a main body having an air intake part and an air exhaust part; an air blowing mechanism provided in the main body near the air intake part; and an airflow heating mechanism in the main body and provided on the The downstream side of the air supply mechanism; and the far-infrared radiator, which is installed in the exhaust part of the main body and can be used for air flow. In the hair dryer, the far-infrared radiator has a shape with a central axis, and the central axis is Substantially parallel to the airflow passing through the far-infrared radiator, it has an annular body portion and a ventilation hole portion provided inside the annular body portion, and the end portion on the exhaust portion side of the airflow heating mechanism is aligned with the annular body portion. The upstream end faces of the annular body portion face each other, so that the upstream end face of the annular body portion is heated by the radiant heat from the airflow heating mechanism.

In addition, the hair dryer according to claim 2 of the present invention is in claim 1, wherein the airflow heating mechanism includes a heater, and the heater is an electric heating wire having a double-coil structure, and a primary coil is wound as a secondary coil. structure, and the thickness in the direction orthogonal to the central axis of the annular body portion is larger than the outer diameter of the primary coil.

In addition, in the hair dryer according to claim 3 of the present invention, in claim 2, one winding amount of the secondary coil in the end portion on the exhaust portion side of the heater is equal to the amount of winding of the secondary coil in the view from the central axis direction. The aforementioned annular body portions overlap.

In addition, in the hair dryer according to claim 4 of the present invention, in claim 3, one winding amount of the secondary coil in the end portion on the side of the exhaust portion of the heater is equal to the amount of winding of the secondary coil in the view from the center axis direction. The aforementioned annular body portions are completely overlapped. Invention effect

The hair dryer described in claim 1 of the present invention is configured as described above, and the heat radiated from the airflow heating mechanism is received by the end face on the upstream side of the annular body portion of the far-infrared radiator, thereby enabling The far-infrared radiator is efficiently heated to emit far-infrared rays.

In addition, the airflow heating mechanism includes a heater which is an electric heating wire having a double coil structure, a structure in which a primary coil is wound to form a secondary coil, and the heater is perpendicular to the center axis of the annular body portion. The thickness in the direction is larger than the outer diameter of the primary coil, whereby the annular body portion can efficiently receive the heat radiated from the heater.

In addition, one winding amount of the secondary coil at the end of the heater on the side of the exhaust portion is overlapped with the annular body portion when viewed from the center axis direction, whereby the annular body portion can be more The heat radiated from the aforementioned heater is efficiently received.

In addition, one winding amount of the secondary coil in the end portion on the side of the exhaust portion of the heater is completely overlapped with the annular body portion when viewed from the center axis direction, whereby the annular body portion can be The heat radiated from the aforementioned heater is received more efficiently.

Form for carrying out the invention

Hereinafter, embodiments of the present invention will be described with reference to FIGS. 1 to 7 . In addition, in the following description, the upper and lower sides and the front and rear are defined with reference to FIGS. 1 and 2 . That is, the top and bottom of FIG. 1 and FIG. 2 are set as top and bottom, and the left of FIG. 1 is the front, and the right is the back. In addition, the front surface of FIG. 2 is the front. 1 is the hair dryer of the present invention. This hair dryer 1 has a main body portion 2 and a far-infrared radiation portion 3 fixed to the front of the main body portion 2 . Further, the main body portion 2 includes a main body 4 made of synthetic resin, an air blowing mechanism 5 , and an airflow heating mechanism 6 . Moreover, the said main body 4 integrally has the airflow generation part 7, the airflow heating part 8, and the grip part 9.

Air intake units 10 are formed on the left and right sides of the airflow generation unit 7 , and the blower mechanism 5 is provided in the vicinity of the air intake units 10 and inside the airflow generation unit 7 . The air blowing mechanism 5 includes a motor 11 , a fan 12 rotated by the motor 11 , and an air guide frame 13 provided to surround the fan 12 . In addition, in this embodiment, although the said fan 12 is a sirocco fan, it may be an axial flow fan.

The airflow heating portion 8 is located in front of the airflow generating portion 7, and is integrally formed with the airflow generating portion 7, and has a tubular shape having an exhaust portion 14 on the front. In addition, the airflow heating part 8 communicates with the airflow generating part 7 . That is, the airflow that has flowed in from the air intake part 10 can be discharged from the air discharge part 14 . Moreover, the air guide duct 15 whose front and rear ends are opened is provided in the inside of the said airflow heating part 8. As shown in FIG. In addition, in this air guide duct 15, the aforementioned airflow heating mechanism 6 is provided. The airflow heating mechanism 6 includes a support frame 16 made of a material having heat resistance and insulating properties, and a heater 17 wound around the support frame 16 . In addition, this heater 17 has a so-called double-coil structure, and is a primary coil 17b in which a heating wire 17a is wound in a coil shape, and is further wound around the support frame 16 as a secondary coil 17c. In addition, the outer diameter of the primary coil 17b of the heater 17 is D. The center axis of the air guide 15 (ie, the direction of the airflow) and the winding center of the secondary coil 17c are coaxial with the center axis X of the far-infrared radiator 22 described later, and extend back and forth.

The grip portion 9 is configured so as to be integrated with the airflow generating portion 7 below the airflow generating portion 7 and have a rod shape. In addition, the aforementioned grip portion 9 includes a main switch operation portion 18 and a changeover switch operation portion 19 on the front side thereof. The main switch operation unit 18 is an operation unit that switches between "strong wind", "weak wind", and "stop". In addition, the switch operation part 19 mentioned above is an operation part which switches "warm air" and "cold air". And the power cord 20 is pulled out from the lower end part of the said holding part 9. As shown in FIG.

The far-infrared radiation part 3 is fixed in front of the exhaust part 14 of the airflow heating part 8 constituting the main body 4 . The far-infrared radiation portion 3 has a short cylindrical tubular frame 21 whose front and rear ends are open, and a plurality of (three in this embodiment) far-infrared radiators 22 fixed to the inner side of the tubular frame 21 . . These far-infrared radiators 22 are made of ceramics or the like that emit far-infrared rays by heating. In addition, all of these far-infrared radiators 22 have the same shape, and have a short cylindrical shape having a virtual central axis X. In addition, in the state where the said far-infrared radiation part 3 is fixed to the said main body part 2, the said center axis line X becomes a front-back direction. In addition, each of the above-mentioned far-infrared radiators 22 is integrally formed with the following members: a short cylindrical annular main body 23, and a plurality of pieces extending from the inner surface of the annular main body 23 toward the center (in this embodiment In the form, there are four rib portions 24 , and an inner cylindrical portion 25 provided at the inner end of these rib portions 24 . Further, the far-infrared radiator 22 is provided with a plurality of (four positions in the present embodiment) vent hole portions 26 and vent hole portions 27, and the vent hole portions 26 are formed by the annular body portion. 23. Defined by the rib portion 24 and the inner cylinder portion 25, the ventilation hole portion 27 is formed in the center of the inner cylinder portion 25. These vent hole portions 26 and 27 extend in parallel with the aforementioned central axis X. That is, the airflow generated by the air blowing mechanism 5 can pass through each of the ventilation holes 26 and 27 . Further, the respective far-infrared radiators 22 (22a, 22b, 22c from the front) are stacked so as to be in contact with each other in the direction of the center axis X in a heat-conducting manner, and the positions of the respective ribs 24 are aligned with each other. In addition, in a state where the far-infrared radiating portion 3 is fixed to the main body portion 2, as shown in FIGS. 6 and 7 , each rib 24 of the far-infrared radiating body 22 is viewed in the direction of the central axis X with respect to each other. The aforementioned support frames 16 are overlapped. Conversely, in the portion where the aforementioned support frame 16 is not provided, the aforementioned rib portion 24 is not provided. In other words, the aforementioned support frame 16 is arranged behind all the ribs 24 . In addition, in the present embodiment, although the support frame 16 and the rib 24 are both cross-shaped when viewed in the direction of the central axis X, it is important that the support frame 16 and the rib 24 are completely overlapped with each other. Therefore, for example, the aforementioned support frame 16 and the rib 24 may be formed into a "*" shape. In addition, since the inner cylinder portion 25 (and the vent hole portion 27 ) are provided so as not to allow fingers to enter through the vent hole portion 26 , as long as the vent hole portion 26 is sufficiently narrowed to prevent the entry of fingers, the The aforementioned inner cylindrical portion 25 is not necessarily required.

The annular body portion 23 is formed thick in the direction perpendicular to the central axis X, and its thickness T is larger than the outer diameter D of the primary coil 17b of the heater 17 (T>D), and the whole is The radius R is about 1/3 (3T≒R). In addition, a hole for ventilation is not formed in the aforementioned annular main body portion 23 itself. In the case of this example, the solid portion (the total of the annular body portion 23 , the rib portion 24 , and the inner cylindrical portion 25 ) and the hollow portion (the total of the vent holes 26 and 27 ) in the far-infrared radiator 22 The ratio is about 7:3. In addition, among the solid portion of the far-infrared radiator 22, the ratio of the annular main body portion 23 is about 80%.

In addition, in the state where the far-infrared radiating part 3 is fixed in front of the exhaust part 14, the rear surface 23a, which is the end face on the upstream side of the annular main body part 23 of the far-infrared radiating body 22c at the rear, is The end portion 17d of the heater 17 is close to and faces the end portion 17d. In addition, the end portion 17d of the heater 17 here refers to one winding of the end portion (ie, the front end portion) on the side of the exhaust portion 14 in the secondary coil 17c of the heater 17 . As shown in FIG. 6 , although the secondary coil 17c is preferably wound in a smooth spiral, the end portion 17d of the heater 17 is completely aligned with the annular body portion 23 in the front view. However, as shown in FIG. 7, the secondary coil 17c is often wound so as to draw an angular spiral, and the end 17d of the heater 17 is seen from the loop in a front view. The body portion 23 is exposed. Even in this case, as long as the end portion 17d of the heater 17 overlaps with the annular body portion 23 in the front view. In addition, the rear surface 23a of the annular main body portion 23 may receive heat (infrared rays) radiated from the portion other than the end portion 17d of the heater 17 .

Next, the operation of this embodiment will be described. In addition, the description of blowing the hair with cold air is omitted. First, the user connects a plug (not shown) provided at the front end of the power cord 20 to an AC power source (not shown). Then, the holding portion 9 is held, and the main switch operating portion 18 is operated in a state where “warm wind” is selected by the switch operating portion 19 to select “strong wind” or “weak wind”. By operating in this way, the motor 11 is actuated to rotate the fan 12, and the air flow sucked from the air intake parts 10 on the left and right is guided by the air guide frame 13 and sent to the front air guide duct 15. Inside. At the same time, the heater 17 of the aforementioned airflow heating unit 8 is energized and generates heat. When the aforementioned airflow passes through the aforementioned air guide tube 15, it will receive the heat from the aforementioned heater 17, so that the airflow becomes warm air. Then, the warm air passes through the ventilation holes 26 and 27 of the far-infrared radiator 22 from the exhaust portion 14 and is released to the front of the blower 1 . At this time, since all the ribs 24 of the far-infrared radiator 22 overlap the support frame 16 when viewed in the direction of the central axis X, the air guide tube 15 can be prevented from being released through the ventilation holes 26 and 27. The loss and turbulence of the airflow to the outside of the blower 1 can be efficiently sent out. Dry the hair by blowing this warm air onto the wet hair.

In addition, as described above, since the rear surface 23a of the annular main body portion 23 of the far-infrared radiator 22c is close to and faces the end portion 17d of the heater 17, the rear surface 23a of the annular body portion 23 of the far-infrared radiator 22c is opposite to the end portion 17d of the heater 17. The heat (infrared rays) radiated from 17d is used to heat the far-infrared radiator 22. Specifically, the heat (infrared rays) radiated from the heater 17 , particularly the end portion 17d , is mainly received by the rear surface 23a of the annular body portion 23 of the far-infrared radiator 22 . In addition, as described above, since the annular body portion 23 itself is not formed with a hole for ventilation, all the heat (infrared rays) radiated from the heater 17 toward the rear surface 23a is received by the rear surface 23a, without passing through the aforementioned annular body portion 23 . Also, as described above, since the thickness T of the annular body portion 23 is larger than the diameter D of the primary coil 17b of the heater 17, it is possible to efficiently cover a wide range of the rear surface 23a. The heat (infrared rays) radiated from the end portion 17d of the heater 17 is received in the ground. And the heat received by the said far-infrared radiator 22c at the rear is conducted to the said far-infrared radiator 22a through the said far-infrared radiator 22b in front of it. In addition, the entire far-infrared radiator 22 is not only directly heated by the heat (infrared) radiated from the heater 17, but also by the warm air heated by the heater 17 passing through the ventilation holes 26 and 27. to be heated indirectly. Thereby, the said far-infrared radiator 22 whole can be heated. In addition, the warm air gives heat to the far-infrared radiator 22 through the ventilation holes 26 and 27, whereby the temperature of the warm air decreases.

In this way, when the far-infrared radiator 22 is heated, the far-infrared radiator 22 can emit far-infrared rays. Then, the wet hair is dried by blowing the above-mentioned warm air to the hair and irradiating the hair with far infrared rays. In addition, by irradiating the hair with far infrared rays, the drying efficiency of the wet hair is improved. Therefore, even if the temperature of the warm air is lowered, or the amount of the warm air is reduced, the head hair can be sufficiently dried. That is, even if the heater 17 or the motor 11 is set to have lower power consumption than those of a general hair dryer, the hair can be sufficiently dried.

[Table 1] Embodiments of the present invention Past products of the applicant in this case Total power consumption (W) 600 1200 The temperature of the warm air immediately after blowing out (°C) 75 90 Air volume of warm air (m ³ /min) 0.60 0.88 Hair temperature (℃) 54 73 Drying time (min) 7 12 Table 1 is a comparison between the products of the present invention and the products sold in the past by the applicant of the present application. The temperature and drying time for the head hair were carried out under the following conditions. The dry object is the same weight of human hairdo bundles. These human hair strands were immersed in warm water adjusted to a temperature of 40° C. for 3 minutes, and then adjusted so that the weights in a state containing water were the same, and the measurement was performed. The temperature of the head hair was measured by adding 4 g of water to a 10 g human hair bundle, blowing warm air (and far infrared rays) from a distance of 5 cm, and measuring the temperature after 6 minutes. The drying time was measured as follows: 30 g of human hair strands were made to contain 10 g of water, and warm air (and far infrared rays) was blown from a distance of 10 cm to measure the time until the total weight of the human hair strands and water became 30 g. , that is, the time until all the water evaporates. In addition, the denaturation temperature of the protein constituting the head hair was 60°C. From the results, it was found that even if the temperature of the head hair was kept below 60° C., which is the denaturation temperature of proteins, the drying time was increased.

In this way, since the temperature of the warm air can be lowered, the denaturation of the proteins constituting the head hair can be suppressed, and the moisture content of the head hair itself can be maintained. In addition, since the air volume of the warm air can be reduced, it is possible to suppress the damage to the surface of the head hair and the generation of static electricity caused by the friction of the head hair with each other. In addition, by suppressing the power consumption of the heater 17 or the electric motor 11, energy saving can also be achieved. In addition, even if the heater 17 is configured as a heater with low power consumption, the far-infrared radiator 22 can efficiently receive the heat (infrared rays) radiated from the heater 17 as described above, so that it is possible to The far-infrared radiator 22 is sufficiently heated to sufficiently generate far-infrared rays. In addition, since the air volume of the warm air may be small, the opening area of the ventilation hole portions 26 and 27 can be reduced (that is, the volume of the solid portion in the far-infrared radiator 22 can be increased), so that more Efficiently emits far infrared rays. In particular, in the case of this example, the solid portion occupies about 70% of the space occupied by the far-infrared radiator 22 , and further, about 80% is mainly used to receive the heat radiated from the heater 17 ( The annular body portion 23 of the infrared ray) can radiate far infrared rays more efficiently.

As described above, the hair dryer of the present invention has: a main body 4, which has an air suction part 10 and an air discharge part 14; an air blowing mechanism 5, which is arranged near the air suction part 10 in the air flow generating part 7 of the main body 4; an air heating mechanism 6, Inside the airflow heating part 8 of the main body 4, and arranged on the downstream side of the air blowing mechanism 5; and the far-infrared radiator 22, which is fixed to the exhaust part 14 of the airflow heating part 8 of the main body 4, and can allow airflow to pass through In the hair dryer 1, the far-infrared radiator 22 has a short cylindrical shape with a central axis X that is substantially parallel to the airflow passing through the far-infrared radiator 22, and has an annular body portion 23 and The vent holes 26 and 27 provided on the inner side of the annular body portion 23, and the end portion 17d on the exhaust portion 14 side of the heater 17 constituting the aforementioned airflow heating mechanism 6 is opposite to the rear surface 23a, so that the air flow from The radiant heat of the airflow heating mechanism 6 heats the rear surface 23a, which is the upstream end face of the annular body portion 23, thereby efficiently heating the far-infrared radiator 22 and emitting far-infrared rays.

In the present invention, the airflow heating mechanism 6 includes the heater 17, the heater 17 is a heating wire 17a having a double coil structure, and the primary coil 17b is wound around the center axis X to form the secondary coil 17c. , and the thickness T in the direction orthogonal to the central axis X of the annular body portion 23 is larger than the outer diameter D of the primary coil 17b, whereby the annular body portion 23 can efficiently receive heat from the the heat radiated from the device 17.

In the present invention, one winding amount of the secondary coil 17c in the end portion on the side of the exhaust portion 14 of the heater 17 (that is, the end portion 17d ) is the same as that of the loop when viewed in the direction of the central axis X. The annular body portion 23 is overlapped, whereby the annular body portion 23 can more efficiently receive the heat radiated from the heater 17 .

In addition, the end portion 17d of the heater 17 completely overlaps with the annular body portion 23 when viewed from the direction of the central axis X, whereby the annular body portion 23 can receive radiation from the heater 17 more efficiently. hot.

In addition, this invention is not limited to the invention of the above-mentioned embodiment, Various deformation|transformation implementation is possible within the range of the summary of invention. For example, in the above-described embodiment, a heater having a double-coil structure is used as the heater, but other heaters may be used. Moreover, in the said embodiment, although ceramic was used as a material of a far-infrared-ray radiator, if it is a material which can radiate far-infrared rays by heating, it may be other than ceramics. In addition, in the above-mentioned embodiment, although a plurality of far-infrared radiators are arranged in the axial direction, a single far-infrared radiator may be used. In addition, in the above-described embodiment, the far-infrared radiator is formed in a short cylindrical shape, but it may be formed in an elliptical cylindrical shape, a polygonal cylindrical shape, a truncated cylindrical shape, as long as it can substantially define the central axis. Nose-shaped, or a three-dimensional shape that differs from one end to the other. In addition, in the above-mentioned embodiment, although the ventilation hole portion is provided in parallel with the central axis, the ventilation hole portion may be provided in a spiral shape with respect to the central axis. In this case, although the blown airflow becomes a vortex, its center is parallel to the aforementioned central axis.

1: Hair dryer 2: Main body 3: Far-infrared radiation part 4: Ontology 5: Air supply mechanism 6: Airflow heating mechanism 7: Airflow generation part 8: Airflow heating part 9: Grip 10: Intake part 11: Motor 12: Fan 13: Air guide frame 14: Exhaust part 15: Air deflector 16: Support frame 17: Heater 17a: Electric heating wire 17b: Primary coil 17c: Secondary coil 17d: end portion (one winding amount of the secondary coil 17c on the exhaust portion 14 side of the heater 17) 18: Main switch operation part 19: Toggle switch operation part 20: Power cord 21: Tubular frame 22, 22a, 22b, 22c: Far-infrared radiators 23: Ring body part 23a: Rear surface (end surface on upstream side) 24: Ribs 25: Inner cylinder 26, 27: Ventilation hole D: The outer diameter of the primary coil 17b R: radius T: Thickness X: center axis

FIG. 1 is a right side view showing a hair dryer according to an embodiment of the present invention. Fig. 2 is a front view of the aforementioned hair dryer. FIG. 3 is a schematic explanatory diagram of the inside of the aforementioned blower. Fig. 4 is a perspective view of a far-infrared radiator of the aforementioned hair dryer. 5 is an external view of the heater 17 constituting the airflow heating mechanism of the aforementioned hair dryer, (a) is the heating wire 17a before being wound into a coil, (b) is the state of the primary coil 17b, (c) is the secondary coil 17c state. Fig. 6 is an explanatory diagram showing the superposition of an ideal far-infrared radiator and an air flow heating mechanism of the above-mentioned blower, (a) is a diagram viewed from the side of the blower mechanism, (b) is a diagram viewed from the side of the exhaust portion . Fig. 7 is an explanatory diagram showing the actual superposition of the far-infrared radiator and the airflow heating mechanism of the blower, (a) is a diagram viewed from the side of the blower mechanism, (b) is a diagram viewed from the side of the exhaust portion .

16: Support frame

17: Heater

17c: Secondary coil

17d: end portion (one winding amount of the secondary coil 17c on the exhaust portion 14 side of the heater 17)

22: Far Infrared Radiator

23: Ring body part

23a: Rear surface (end surface on upstream side)

24: Ribs

25: Inner cylinder

26: Ventilation hole part

27: Ventilation hole part

Claims (4)

A hair dryer, characterized in that: the hair dryer has: a main body with a suction part and an exhaust part; an air supply mechanism, which is arranged near the suction part in the main body; and an airflow heating mechanism in the main body and arranged in the air supply part. The downstream side of the mechanism; and the far-infrared radiator, which is installed in the exhaust part of the aforementioned main body, and can allow airflow to pass through, In the aforementioned hair dryer, the far-infrared radiator has a shape having a central axis substantially parallel to the airflow passing through the far-infrared radiator, and has an annular body portion and a The vent hole portion, and the end portion on the exhaust side of the airflow heating mechanism is opposite to the upstream side end surface of the annular body portion, so that the annular body portion is heated by the radiant heat from the airflow heating mechanism. end face on the upstream side. The hair dryer of claim 1, wherein the airflow heating mechanism has a heater, and the heater is an electric heating wire with a double coil structure, a structure in which a primary coil is wound as a secondary coil, and the heater is connected to the aforementioned annular body portion. The thickness in the direction orthogonal to the central axis is larger than the outer diameter of the aforementioned primary coil. The hair dryer of claim 2, wherein one winding amount of the secondary coil in the end of the heater on the side of the exhaust portion overlaps with the annular body portion when viewed in the direction of the central axis. The hair dryer according to claim 3, wherein one winding amount of the secondary coil in the end of the heater on the side of the exhaust portion completely overlaps with the annular body portion when viewed in the direction of the central axis.

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