Hair dryer

Abstract

To provide a hair dryer capable of shortening a drying time by increasing a contact area of air to hair.SOLUTION: The air dryer 1 includes a body housing 2 having an air inlet 21 and an air outlet 22 at both ends facing each other, a fan 4 for blowing air arranged in the body housing 2, a motor 5 for driving the fan 4, and an air collecting hood 6 arranged at the air outlet 22. The air collecting hood 6 includes an outer annular cylinder 13 having a bell-mouth-shaped inner peripheral surface, a guide cylinder 15 supported inside the outer annular cylinder 13 via a support plate 17, an inner blowout passage 14 provided in the guide cylinder 15 and located at the center of the outer annular cylinder 13, and an outer blowout passage 16 defined between the outer annular cylinder 13 and the guide cylinder 15.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present invention relates to a hair dryer. [Background technology]

[0002] Conventionally, there has been known a hair dryer that has a nozzle attached to the outlet of the main housing that has a built-in fan for blowing air, the nozzle communicating with the downstream end of the air passage, and the central part of the nozzle being a weak wind area from which air is not emitted, and multiple divided parts surrounding the weak wind area being strong wind areas from which air is directly emitted (see, for example, Patent Document 1).

[0003] Furthermore, the hair dryer described in Patent Document 1 generates a so-called "point strong wind" with a clear difference in wind speed and pressure between the weak wind area in the center of the nozzle and the strong wind area on either side of it, making it possible to easily and effectively shorten drying time. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] Patent No. 4420059 Summary of the Invention [Problem to be solved by the invention]

[0005] However, in the hair dryer described in Patent Document 1, although a "point strong wind" with a difference in wind speed between the weak wind area and the strong wind area is generated, such a "point strong wind" is simply ejected in front of the strong wind area, so there is room for improvement from the perspective of shortening the drying time.

[0006] The present invention has been made in consideration of the above-mentioned circumstances, and its object is to provide a hair dryer that can increase the contact area of ​​the airflow with the hair and shorten the drying time. [Means for solving the problem]

[0007] In order to achieve the above object, one aspect of the present invention is a hair dryer comprising: a main housing having an air intake and an air outlet at opposite ends; a blower fan disposed within the main housing; a motor for driving the fan; and an air collection hood disposed at the air outlet, wherein the air collection hood comprises an outer ring tube portion having a bell-mouth-shaped inner surface; an induction tube portion supported inside the outer ring tube portion via a support plate; an inner air outlet passage provided in the induction tube portion and located at the center of the outer ring tube portion; and an outer air outlet passage defined between the outer ring tube portion and the induction tube portion, and wherein an exchange space is provided upstream of the air flow path within the air collection hood where central air and peripheral air of the air blown out from the main housing are mixed. [Effects of the Invention]

[0008] According to the present invention, it is possible to provide a hair dryer that can increase the contact area of ​​airflow with hair and shorten the drying time. [Brief explanation of the drawings]

[0009] [Figure 1] 1 is a perspective view of a hair dryer according to an embodiment of the present invention. [Figure 2] FIG. 2 is a perspective view showing the hair dryer with the air collecting hood separated from it. [Figure 3] FIG. 2 is a cross-sectional view of the hair dryer. [Figure 4] FIG. [Figure 5] FIG. DETAILED DESCRIPTION OF THE INVENTION

[0010] Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

[0011] FIG. 1 is a perspective view of a hair dryer according to an embodiment, FIG. 2 is a perspective view showing the hair dryer with the air collecting hood separated from it, FIG. 3 is a cross-sectional view of the hair dryer 1, FIG. 4 is a perspective view of the air collecting hood, and FIG. 5 is a front view of the air collecting hood.

[0012] As shown in Figures 1 to 3, the hair dryer 1 according to this embodiment mainly comprises a cylindrical main body housing 2, a handle portion 3 connected to the main body housing 2, a blower fan 4 arranged within the main body housing 2, a motor 5 that drives the fan 4, and an air collection hood 6 that collects the air blown out from the main body housing 2.

[0013] The main housing 2 has an air intake 21 and an air outlet 22 at opposite ends. The air intake 21 is provided on the rear end side of the main housing 2, and air is drawn into the main housing 2 through the air intake 21. The air intake 21 is covered with a mesh filter, and a partition plate 23 with spider web-shaped air holes is provided on the inside. This makes it difficult for foreign matter such as dirt, dust, and hair to enter the main housing 2 through the air intake 21. In addition, a partition plate 24 with spider web-shaped air holes is attached to the air outlet 22.

[0014] The fan 4 and motor 5 constitute a blower 7 that outputs air drawn in through the air intake 21 as an air current toward the air outlet 22. The blower 7 is disposed on the central axis O (see FIG. 3) of the main body housing 2 with the fan 4 facing the air intake 21. A heater 8 is disposed inside the main body housing 2 to heat the air current generated by the blower 7 and turn it into warm air. A heater cover 25 is disposed on the outside of the heater 8, and the heater cover 25 is inclined so as to taper toward the air outlet 22.

[0015] The handle 3 is provided with a push switch 9 for turning the power on and off, and a slide switch 10 for switching between hot and cold air modes. A circuit board (not shown) for a control circuit that controls the fan 4 and motor 5 is housed inside the handle 3, and electronic components such as switches and sensors are also mounted on this circuit board. A power cord 12 is connected to the circuit board, and this power cord 12 is led out from the bottom end of the handle 3 to the outside.

[0016] The handle 3 is foldable around a rotation shaft 11 provided inside the upper portion. As a result, when the hair dryer 1 is in use, the handle 3 can be opened and extended in a direction substantially perpendicular to the main body housing 2, as shown in Figs. 1 to 3. When the hair dryer 1 is not in use, the handle 3 can be rotated around the rotation shaft 11 to be folded in a state substantially parallel to the main body housing 2.

[0017] The wind collecting hood 6 is a molded product made of synthetic resin material. As shown in Figures 4 and 5, the wind collecting hood 6 is configured to have an outer ring cylinder portion 13, an induction cylinder portion 15 provided inside the outer ring cylinder portion 13, a support plate 17 that supports the induction cylinder portion 15 on the inner peripheral surface of the outer ring cylinder portion 13, an inner blow-out passage 14 provided in the induction cylinder portion 15, and an outer blow-out passage 16 defined between the outer ring cylinder portion 13 and the induction cylinder portion 15.

[0018] The wind collecting hood 6 is detachably attached to the front end of the main housing 2, and is connected to the air outlet 22 by snapping it onto the front end of the main housing 2. This allows air generated by the blower 7 to be discharged forward from the air outlet 22 through the wind collecting hood 6.

[0019] The outer annular tube portion 13 is a cylindrical portion with a circular opening at its front end. The outer annular tube portion 13 is composed of two members, an inner part 13a and an outer part 13b, and the inner part 13a has a bell-mouth-shaped inner peripheral surface. That is, the inner peripheral surface of the outer annular tube portion 13 is curved so as to gently widen toward the front. The wind collecting hood 6 is attached to the front end of the main body housing 2 by fitting the outer part 13b of the outer annular tube portion 13 into the front end of the main body housing 2. In this case, the inner surface of the inner part 13a provided on the wind collecting hood 6 and the heater cover 25 arranged inside the main body housing 2 are set at the same inclination angle so that they are continuous without any steps between them (see FIG. 3).

[0020] The guide tube portion 15 is a cylindrical portion provided inside the outer ring tube portion 13 and is supported on the inner circumferential surface of the outer ring tube portion 13 by a pair of support plates 17. The outer ring tube portion 13 and the guide tube portion 15 are arranged concentrically, and an annular outer blow-out passage 16 is defined between the outer ring tube portion 13 and the guide tube portion 15. The axial length of the guide tube portion 15 is shorter than the overall length of the outer ring tube portion 13, and the guide tube portion 15 is arranged in a range extending from the tip of the outer ring tube portion 13 to a midpoint inside. In other words, the guide tube portion 15 is not arranged inside the rear end portion of the outer ring tube portion 13, and the upstream side of the air flow path within the air collecting hood 6 is surrounded only by the guide tube portion 15, forming an exchange space 18 into which the guide tube portion 15 does not extend (see FIG. 3). The length of the exchange space 18 in the axial direction along the central axis O is set to be in the range of 1 / 5 to 1 / 2 (preferably about 1 / 3) of the total length of the wind collecting hood 6.

[0021] If the front end surface of the outer ring tube portion 13 is defined as a first surface and the front end surface of the guide tube portion 15 is defined as a second surface, the first surface and the second surface are planes parallel to each other, and the second surface is disposed slightly inward of the wind collecting hood 6 relative to the first surface. However, the first surface of the outer ring tube portion 13 and the second surface of the guide tube portion 15 may be on the same plane. Furthermore, as shown in FIG. 3 , the first surface of the outer ring tube portion 13 (the front end surface of the wind collecting hood 6) and the central axis O of the main body housing 2 are perpendicular to each other.

[0022] The inner outlet passage 14 is a through-hole provided in the guide tube portion 15, and the center of the inner outlet passage 14 coincides with the central axis O of the main body housing 2. As described above, the guide tube portion 15 is not provided at the rear end side of the outer annular tube portion 13, and therefore the rear end of the inner outlet passage 14 communicates with the exchange space 18. Here, the guide tube portion 15 has a truncated conical shape with a larger diameter at the front end side, which is the air outlet, than at the rear end side. As a result, the opening area of ​​the inner outlet passage 14 increases from the upstream side to the downstream side of the air flow path. Note that if the area of ​​the entire air flow path passing through the inner outlet passage 14 and the outer outlet passage 16 is S, and the area of ​​the air flow path passing only through the outer outlet passage 16 is S1, the area S1 of the outer outlet passage 16 is set to be in the range of 1 / 3 to 1 / 2 (preferably 1 / 2) of the entire area S.

[0023] In the hair dryer 1 configured in this manner, more air is output near the center of the air outlet 22 than at outer positions away from the center. Also, the temperature of the peripheral air passing through the outer periphery near the heater 8 is high, and the temperature of the central air passing through the center far from the heater 8 is lower than that of the peripheral air.

[0024] 3, of the air generated by blower 7 and heading toward outlet 22, the high-temperature peripheral wind passing through the outer periphery and the low-temperature central wind passing through the center are mixed in exchange space 18 within wind collecting hood 6 that is continuous with outlet 22, and become a uniform temperature. Then, of the air whose temperature has been uniformized in exchange space 18, the air near the center passes through inner outlet passage 14 and spreads in the diffusion direction (see arrow W1), and the air at the outer periphery passes through outer outlet passage 16 and spreads in the diffusion direction (see arrow W2), so that wind of a uniform temperature is blown out from inner outlet passage 14 and outer outlet passage 16 of wind collecting hood 6.

[0025] In this case, the inner surface of the outer annular tubular portion 13 is formed in a bell-mouth shape, and the opening area of ​​the inner blowing passage is formed so as to expand from the upstream side to the downstream side of the air flow path, so that the range of the air blown out from the inner blowing passage 14 and the outer blowing passage 16 is expanded uniformly, making it possible to disperse the air pressure without reducing the air speed, and by eliminating localized air pressure differences, the contact area of ​​the air with the user's hair is increased, which is gentle on the hair and effectively reduces drying time.

[0026] As described above, the hair dryer 1 according to this embodiment can achieve the following effects.

[0027] The air collecting hood 6 attached to the air outlet 22 of the main body housing 2 includes an outer annular tube portion 13 having a bell-mouth-shaped inner peripheral surface, an induction tube portion 15 supported inside the outer annular tube portion 13 via a support plate 17, an inner air outlet passage 14 provided in the induction tube portion 15 and located at the center of the outer annular tube portion 13, and an outer air outlet passage 16 defined between the outer annular tube portion 13 and the induction tube portion 15, and an exchange space 18 is provided upstream of the air flow path within the air collecting hood 6. As a result, the high-temperature outer peripheral air and the low-temperature central air blown out from the main body housing 2 are mixed to a uniform temperature in the exchange space 18, and then discharged while spreading in the diffusion direction through the inner air outlet passage 14 and the outer air outlet passage 16 of the air collecting hood 6. As a result, air with a uniform temperature is blown out from the air collecting hood 6, and the air temperature on the user's hair can be made uniform, effectively shortening the drying time and resulting in a beautifully finished hair style.

[0028] Furthermore, the inner peripheral surface of the outer annular tubular portion 13 is formed in a bell-mouth shape, and the opening area of ​​the inner blowing passage is formed so as to expand from the upstream side to the downstream side of the air flow path, so that the range of the air blown out from the inner blowing passage 14 and the outer blowing passage 16 is expanded uniformly, allowing for drying over a wider area.

[0029] Furthermore, since the outer ring tube portion 13 having a circular opening and the cylindrical guide tube portion 15 are arranged concentrically, the outer blowing passage 16 defined between the outer ring tube portion 13 and the guide tube portion 15 has a circular ring shape of the same width along the circumferential direction, and the range of air blown out from the outer blowing passage 16 can be stabilized.

[0030] Furthermore, in this embodiment, the support plate 17 that supports the guide tube portion 15 is disposed perpendicular to the opening surface of the outer annular tube portion 13, but the support plate 17 may be inclined with respect to the opening surface of the outer annular tube portion 13. In this way, the wind passing through the outer outlet passage 16 becomes a swirling wind by the support plate 17, and it is possible to create a difference between the wind passing through the inner outlet passage 14 and the wind passing through the outer outlet passage 16.

[0031] The present invention is not limited to the above-described embodiments, and various modifications are possible within the scope of the gist of the present invention. The present invention covers all technical matters included in the technical ideas described in the claims. The above-described embodiments are preferred examples, but a person skilled in the art can realize various alternatives, modifications, variations, or improvements from the contents disclosed in this specification, and these are included in the technical scope described in the appended claims.

[0032] For example, in the above embodiment, the guide tube portion 15 is supported on the inner surface of the outer ring tube portion 13 by a pair of support plates 17, but the number of support plates 17 is not limited to two, and the guide tube portion 15 may be supported by one or three or more support plates 17.

[0033] In the above embodiment, the inner blow-out passage 14 having a circular opening is provided in the cylindrical outer annular tube portion 13, but the shape of the guide tube portion 15 is not limited to a cylindrical shape and may be a polygonal shape such as a square or a triangle, or an elliptical shape. Similarly, the shape of the inner blow-out passage 14 is not limited to a circular shape and may be a polygonal shape such as a square or a triangle, or an elliptical shape.

[0034] Furthermore, in the above embodiment, the wind collecting hood 6 is a separate member that can be attached to and detached from the main body housing 2, but the wind collecting hood 6 may be provided integrally with the main body housing. [Explanation of symbols]

[0035] 1 hair dryer 2 Main body housing 3 Handle 4 Fans 5 motors 6. Wind-collecting hood 7. Blower 13 Outer ring cylinder part 14 Inner air outlet passage 15 Guide cylinder part 16 Outside air outlet passage 17 Support plate 18 Exchange space 21 Air intake 22 Air outlet

Claims

1. a main body housing having an intake port and an outlet port at opposite ends; a blower fan disposed within the main body housing; a motor that drives the fan; A wind collecting hood is provided at the air outlet, The wind collecting hood includes an outer ring cylinder portion having a bell-mouth shaped inner peripheral surface, an induction cylinder portion supported on the inside of the outer ring cylinder portion via a support plate, an inner blow-out passage provided in the induction cylinder portion and positioned at the center of the outer ring cylinder portion, and an outer blow-out passage defined between the outer ring cylinder portion and the induction cylinder portion, An exchange space is provided on the upstream side of the air flow path in the air collecting hood, in which central air and peripheral air of the air blown out from the main body housing are mixed. A hair dryer characterized by:

2. The hair dryer according to claim 1, The inner outlet passage is formed so that the opening area increases from the upstream side to the downstream side of the air flow path. A hair dryer characterized by:

3. The hair dryer according to claim 1, The outer ring cylinder portion and the guide cylinder portion are concentrically arranged. A hair dryer characterized by:

Images