JP2547691B2 - Hair dryer - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dryer capable of irradiating far infrared rays.

[0002]

2. Description of the Related Art A hair dryer of this type is proposed in, for example, Japanese Utility Model Laid-Open No. 62-109004. As shown in FIGS. 7 (a) and 7 (b), a hot air outlet 2 of the body case 1 is provided with an air outlet grill 20 having a far-infrared radiation substance attached thereto. By irradiating the hair with far-infrared rays, the hair can be dried quickly, and blood circulation in the scalp can be promoted.

[0003]

However, the blow-out grill 20 having the far-infrared radiation substance attached thereto has a problem when the irradiation amount is increased in order to enhance the effect of far-infrared radiation. That is, the outlet grille 20 is provided to protect the user from danger and prevent damage to the built-in parts. The far-infrared radiation substance is attached to the outlet grille 20 by dipping or thermal spraying. In order to increase the far infrared ray irradiation amount, it is necessary to increase the total area of the outlet grill 20. For that purpose, it is necessary to set the width H dimension of the lattice rib 21 of the outlet grill 20 large. However, if the grid rib width H is increased in this way, the opening size of each ventilation hole 22 surrounded by the grid ribs 21 becomes small and the ventilation resistance becomes large, so that sufficient blowing is not performed and the heat inside the main body case 1 is not generated. There is a problem that a muffled phenomenon occurs. However, in order to reduce the ventilation resistance,
When the lattice rib width H of the outlet grill 20 is reduced, the far infrared ray irradiation amount tends to be insufficient. As described above, it is desirable to reduce the grid rib width H from the perspective of ventilation resistance, and it is necessary to widen the grid rib width H from the perspective of far-infrared irradiation amount, which is a trade-off relationship. Further, when the width H of the lattice rib 21 is formed to be wide and the surface 21a of the rib 21 facing the outside of the air outlet is formed flat, the flat surface 21a is formed as shown in FIG. 7B. At that time, a turbulent flow of warm air is generated, which lowers the irradiation efficiency and may generate wind noise. Further, the lattice rib 21 of the outlet grill 20 is formed in a quadrangular cross section, but the cross sectional area of the lattice rib 21 can be increased to increase its strength or to increase the heat receiving area on the back surface 21b of the lattice rib 21. However, in such a case, the opening size of the ventilation hole 22 is also reduced, the ventilation resistance is increased, and it becomes difficult to sufficiently blow the air. Such a problem is not limited to the grill type in which the far-infrared radiation substance is adhered to the air outlet grill 20 as described above, and the far-infrared radiation substance is formed separately from the air outlet grill and has the same porous shape as the air outlet grill shape. The same applies to the case of forming a far-infrared radiation plate in the shape of a line and arranging the far-infrared radiation plate side by side on the outlet grill.

An object of the present invention is to reduce the ventilation resistance at the hot air outlet by making a careful adjustment to the cross-sectional shape of the grid rib of the far infrared radiation plate in the above far infrared radiation type hair dryer. The point is to increase the far infrared radiation dose. Another object of the present invention is to increase the heat receiving area while ensuring the narrowing of the grid rib width,
The point is to increase the strength of the grid rib of the far-infrared radiation plate.

[0005]

In the hair dryer of the present invention, as in the illustrated example, in the far-infrared radiation plate 6 in the form of a lattice arranged on the air outlet 2 side of the main body case 1, the lattice rib 8 of the far-infrared radiation plate 6 is provided. As a cross-sectional shape, the surface facing the outside of the air outlet is formed as a convex curved surface 11, and the back surface 13 facing inward of the air outlet is formed to have a counter sink 13a.

[0006]

By forming the surface of the grid rib 8 of the far infrared radiation plate 6 on the convex curved surface 11, the width H of the grid rib 8 is not widened, that is, the opening size of each ventilation hole 7 is reduced. Instead, the far infrared irradiation area can be increased and the irradiation amount can be increased. On the surface of the convex curved surface 11 of the lattice rib 8,
The flow of wind is smooth and turbulence is no longer generated. According to the cross-sectional shape of the grid rib 8 such that the surface of the grid rib 8 is formed into the convex curved surface 11 and the back surface 13 is formed to have the counter sink 13a, the strength of the cross-section is increased even if the width H of the grid rib 8 is narrowed. Can be secured. By forming the back surface of the grid rib 8 to have the counter sink 13a, the area of the back surface 13 that receives the heat of the warm air can be increased even if the width H of the grid rib 8 is narrowed.

[0007]

1 to 4, reference numeral 1 is a main body case of a hair dryer, 2 is an air outlet provided at a front end of the main body case 3, 3 is a suction port provided at a rear end of the main body case 1, and 4 is a main body case. A heater 5 accommodated inside 1 is a blower fan disposed behind the heater 4 inside the main body case 1. A far-infrared radiation plate 6 which also serves as an outlet grill is arranged at the outlet 2 of the main body case 1. The far-infrared radiation plate 6 has a far-infrared radiation substance film 10 formed by coating a far-infrared radiation substance on a grid-shaped base material 9.

Specifically, the far infrared radiation plate 6 is manufactured as follows. First, by pressing a metal plate, a base material 9 having a large number of ventilation holes 7 and a large number of grid ribs 8 and having a dome shape as a whole is obtained as shown in FIG. The surface 8a of the lattice rib 8 of the base material 9 is formed into a convex curved surface, and the back surface 8b is formed into a shape having a counter sink. Next, the base material 9 is degreased, then first dipped in a solution or dispersion of a far-infrared radiation substance and naturally dried. After secondary dipping and natural drying, forced drying is performed at a predetermined temperature. In this way, the far-infrared radiation substance film 10 is applied and formed on the base material 9, and the far-infrared radiation substance film 10 formed on the convex curved surface of the surface 8a of the lattice rib 8 of the lattice rib 8 as shown in FIG. Convex curved surface 11 toward the outside
And increase the surface area. Therefore, the warm air from the heater 4 smoothly flows along the convex curved surface 11 of the far-infrared radiation material film 10, and the far infrared rays are radiated toward the outside of the air outlet 2 in a large amount due to the expansion of the surface area by the convex curved surface 11. To do.
The far-infrared radiation substance film 10 is formed in a shape having a counter sink 13a on the back surface 8b of the lattice rib 8 having the counter sink. The side surface 12 of the far-infrared radiation material film 10 on the lattice rib 8 facing the ventilation hole 7 and the back surface 13 having the counter sink 13a facing the inside of the air outlet are:
This is a place where the contribution of improving the irradiation efficiency is low, and the film thickness on each of the surfaces 12 and 13 is formed to be smaller than the film thickness on the convex curved surface 11 to secure the opening size of the ventilation hole 7 as large as possible. Enables economical application. Back surface 13 of far-infrared radiation material film 10 on the grid ribs 8
Is a surface that directly receives the warm air heat from the heater 4, but since this heat receiving surface is formed in a concave shape having the counter sink 13a, the heat receiving area can be increased accordingly, and the far infrared radiation material film 10 It is well heated and emits far infrared rays efficiently.

An example of the components of the solution or dispersion of the far-infrared emitting substance is a mixture of the far-infrared emitting substance powder, an organic binder of 67% and a solvent of 33%. As the powder of the far-infrared radiation substance, for example, a ceramic such as zirconia or alumina silicon carbide is used, and the particle size is 10 to 50 μm. As the organic binder, a urethane binder is preferable.

The base material 9 may be a metal such as iron or aluminum, or a synthetic resin (particularly, a synthetic resin such as polycarbonate having excellent heat resistance), but a material having a large specific heat such as iron is preferable. This is because when the base material 9 is made of a material having a large specific heat, the far-infrared radiation substance film 10 is uniformly heated from the inside of the cross section to the outside, and the irradiation efficiency can be further enhanced. On the other hand, when the base material 9 is made of resin, the far infrared radiation material film 10
Is heated only by the hot air flowing on this surface, and as shown in FIG. 1, the temperature at the center point A on the leeward side tends to be low, resulting in poor irradiation efficiency. Further, the base material 9 made of resin has low heat retention and heat conductivity, is directly affected by the temperature distribution of the hot air, and the irradiation amount at the center of the far-infrared radiation plate 6 and in the vicinity of the outer periphery of the far-infrared radiation plate 6 varies. It is easy to happen. In addition,
When the base material 9 is composed of a metal plate, the metal plate may be plated with neutralized or unneutralized plating or nickel plating.

The far-infrared radiation plate 6 is formed in a dome shape having a convex arc shape toward the outside of the air outlet even in the whole cross-sectional shape, and the film thickness of the far-infrared radiation substance film 10 at the central portion of the plate surface. The film thickness t of the peripheral mounting portion 14 is formed thinner than T. In such a case, the far-infrared radiation plate 6 is bent when the far-infrared radiation plate 6 is press-fitted into the groove 16 on the inner wall of the outlet 2 of the main body case 1 as shown in FIG. When the film thickness t is large, it is difficult to bend and it is difficult to securely fit and fix. Further, when the thickness t of the peripheral edge mounting portion 14 is large, the far-infrared irradiation of the portion in contact with the inner wall of the main body case 1 is performed on the main body case 1, and the temperature of the relevant portion of the main body case 1 is increased more than necessary. Although there is a problem in that it is easily raised to cause thermal deformation, such a problem can be solved by reducing the film thickness t of the peripheral edge mounting portion 14.

The back surface 13 of the grid rib 8 of the far infrared radiation plate 6.
Forming a counter sink 13a on the edge 1
If 5 is provided inward of the blow-out port, it is advantageous that the edge 15 can exert a liquid-cutting action of the solution or dispersion of the far-infrared emitting substance during coating by dipping or the like. The edge 15 is easily obtained by pressing the base material 9 with a metal plate.

FIG. 5 shows a modification of the cross-sectional shape of the lattice rib 8 of the far infrared radiation plate 6, which is the lattice rib 8 of the base material 9.
Is formed in a circular arc shape in cross section with a constant plate thickness, the front surface 8a is formed into a convex curved surface and the back surface 8b is formed into a concave curved surface, and the far-infrared radiation substance film 10 is formed by coating on both front and back surfaces thereof.

FIG. 6 shows another embodiment of the cross-sectional shape of the grating rib 8 of the far infrared radiation plate 6. In this example,
The surface 8a of the lattice rib 8 of the base material 9 is formed to be a rough surface in order to strengthen the adhesive force of the far-infrared radiation substance film 10, and the far-infrared radiation substance film 10 is applied and formed only on this surface. The back surface 8b of the lattice rib 8 of the base material 9 is formed in a shape having the counter sink 13a by exposing the background without coating the far infrared radiation material film 10.

In the present invention, the far infrared radiation plate 6 is
In addition to the one that doubles as the outlet grille as in the above embodiment,
The far-infrared radiation plate may be independently formed as a separate body from the air outlet grill and used in parallel with the air outlet grill. Further, the far-infrared radiation plate 6 may be formed in a quadrangle instead of being formed in a circular shape when viewed from the front as shown in FIG. Further, the far-infrared radiation plate 6 is provided in place of the inside of the air outlet 2 of the main body case 1 as shown in FIG.
When the blowout nozzle N as shown in (1) is attached to the main body case 1, it may be arranged inside the blowout nozzle N. Further, the far-infrared radiation plate 6 may be formed by eliminating the base material 9 and molding the far-infrared radiation substance alone into a lattice shape having the lattice ribs 8 having the above-described cross-sectional shape.

[0016]

According to the present invention, the surface 8a of the grating rib 8 of the far-infrared radiation plate 6 arranged on the side of the air outlet 2 is provided with the convex curved surface 1
Formed to 1. Therefore, the surface area of the grating rib 8 can be increased, and the far infrared ray irradiation amount can be increased. Moreover, the opening size of the ventilation hole 7 is limited to the extent that the ventilation resistance does not increase, and the ventilation resistance can be reduced, sufficient blowing can be ensured, and the occurrence of the heat retention phenomenon in the main body case 1 can be prevented. . In addition, the surface of the lattice rib 8 facing at least to the outside of the air outlet is thus convex curved surface 11
By forming the streamlined shape, the flow of the wind is smooth, turbulence is not generated, and the noise of the wind noise can be suppressed to a low level. In particular, according to the present invention, since the counter sink 13a is formed on the back surface 13 of the lattice rib 8 to increase the heat receiving area, the far-infrared radiation substance is heated well and the irradiation efficiency of far-infrared radiation can be improved. it can. Further, the cross-sectional shape of the lattice rib 8 has a convex curved surface 11 on the front surface and a back surface 1
Since 3 is formed to have the counter sink 13a, it is possible to secure the strength of the ribs 8 while narrowing the width H of the grid ribs 8, to reduce the ventilation resistance and to further enhance the sufficient blowing effect.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a far infrared radiation plate of a hair dryer.

FIG. 2 is a front view of a far infrared radiation plate of a hair dryer.

FIG. 3 is a side view showing a hair dryer with a blowout port portion cut away.

FIG. 4 is a cross-sectional view of a base material of a far infrared radiation plate of a hair dryer.

FIG. 5 is a partial cross-sectional view of a far infrared radiation plate of another embodiment.

FIG. 6 is a partial cross-sectional view of a far infrared radiation plate of another embodiment.

FIG. 7 shows a conventional hair dryer, and FIG.
FIG. 7A is a front view, and FIG. 7B is a sectional view of a part of the outlet grill.

[Explanation of symbols]

 1 Body Case 2 Outlet 6 Far Infrared Radiation Plate 7 Vent Hole 8 Lattice Rib 9 Base Material 10 Far Infrared Radiation Material Film 11 Convex Curved Surface 13 Backside 13a Countersink

 ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP-A-113078 (JP, A) Actually opened 62-143408 (JP, U) Actually opened 63-64304 (JP, U) Actually opened 63- 166104 (JP, U) Actually opened 63-166105 (JP, U) Actually opened 62-69907 (JP, U) Actually opened 62-109004 (JP, U) Actually opened 62-143406 (JP, U) 62-143407 (JP, U) 52-143407 (JP, U)

Claims (1)

(57) [Claims] 1. A hair dryer in which a far-infrared radiation plate 6 having a plurality of ventilation holes 7 and a lattice rib 8 surrounding each ventilation hole 7 is disposed on the outlet 2 side of a main body case 1 in which a lattice rib is provided. A hair dryer characterized in that, in the cross-sectional shape of 8, the surface facing outward of the air outlet is formed into a convex curved surface 11, and the back surface 13 facing inward of the air outlet is formed to have a counter sink 13a.