JPH056886Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention relates to a hair dryer that has been improved so that warm air is blown out at a uniform temperature from a hot air outlet.

[Conventional technology]

Conventionally, as a hair dryer, as shown in FIG.
A heat generating section 7 by a heater, a motor 3, and an axial fan 4 are arranged along the longitudinal axis P of the main body case 1 in order from the front. And main case 1
A hot air outlet 1 is located further forward than the heat generating part 7 on the lower surface side.
1, a suction port 6 is provided at the rear end, a fan 4 is rotated by a motor 3, air is sucked in from the suction port 6, the air is heated by a heat generating portion 7, and the heat generating portion 7 is wrapped around the cross shape. There is one in which hot air is blown out in a downward direction substantially perpendicular to the axis P from a hot air outlet 11 guided by insulating substrates 8a and 8b.

[Problem that the invention attempts to solve]

However, in the conventional hair dryer described above, which heats the air generated along the axis P of the main body case 1 and then blows it out in a downward direction substantially perpendicular to the axis P, the hot air is heated. It is difficult to blow out the hot air at a uniform temperature from the hot air outlet 11, and temperature unevenness is likely to occur. In particular, as shown in FIG.
A horizontal board 8a divides the air flow path into upper and lower parts approximately equally, and the front end of the board 8a is connected to a hot air outlet 11.
The substrate 8a extends to approximately the center position in the front-rear direction, covers the bottom side of the air flow path, and covers the bottom side of the air flow path.
When the front end 10e of the bottom wall 10c, which covers the front end of the heater wire 9 wound around the heater wire 9, faces the intermediate position between the front end of the substrate 8a and the rear edge 11a of the hot air outlet 11, the hot air outlet 11, the substrate 8
There is a strong tendency for the hot air flows flowing above and below a to overlap near the center R in the longitudinal direction of the hot air outlet 11 (see FIG. 9), and as a result, a portion of the outlet grille 13 facing the front end 10e of the bottom wall 10c This is because this is the highest temperature air region. In particular, for the purpose of reducing the weight of the hair dryer and improving its portability, the length of the main body case 1 in the front and back direction is shortened, and in order to make the hair dryer more compact, the heat generating part 7 is placed as much as possible inside the hot air outlet 11. When they are placed close to each other, the hot air blows out at high speed while remaining at a high temperature, so the local abnormal high temperature phenomenon described above is likely to occur prominently. There is a risk that such localized abnormal high temperatures may burn the hair or cause burns, and uneven dryness of the hair may occur.

The purpose of this invention is to solve this problem and blow out hot air at a constant temperature as evenly as possible over the entire outlet.

[Means for solving problems]

As shown in the illustrated example, the hair dryer on which this invention is based has an air flow path formed in the main body case 1 along the longitudinal axis P of the hair dryer, through which warm air is blown toward the front of the case. that a hot air outlet 11 through which hot air is blown only in a downward direction substantially perpendicular to the axis P is opened on the lower surface side of the front end of the main body case 1 with substantially the same opening width in the front and rear direction; A horizontal substrate 8a that divides this channel into upper and lower parts approximately equally is disposed within the horizontal substrate 8a.
a has a front end extending to approximately the center position in the front-rear direction of the hot air outlet 11, and a bottom wall 10c that covers the bottom side of the air flow path and covers up to the front end of the heater wire 9 wound around the horizontal substrate 8a. The front end 10e of the horizontal board 8a faces an intermediate position between the front end of the horizontal board 8a and the rear edge 11a of the hot air outlet 11. It is required that it is inserted.

In addition, this invention is based on the air outlet grille 13.
A wind shielding wall portion 1 that does not allow hot air to pass through or is difficult to pass through is located in the hottest air region facing the front end 10e of the bottom wall 10c.
4 was formed.

Here, the wind blocking wall portion 14 may be formed as a blind wall to completely shut out ventilation, or holes 19 smaller than the ventilation holes 12 may be provided to increase flow resistance.

[Effect]

In such a case, the upper and lower hot air flows partitioned by the horizontal board 8a in the hot air outlet 11 overlap near the front end 10e of the bottom wall 10c, resulting in an abnormally high temperature. In the case where the high-temperature air is formed at If the wind shield wall 14 has holes 19 smaller than the ventilation holes 12, the high temperature air will be difficult to pass through and will tend to accumulate on the inner surface of the wind shield wall 14. The air is mixed with warm air of a lower temperature to approximate a uniform temperature distribution before being blown out from the ventilation holes 12, and as a result, the temperature distribution blown out from the outlet grille 13 can be made uniform.

[Effect of idea]

Therefore, according to the present invention, the air generated along the axis P in the air flow path partitioned into upper and lower parts by the horizontal board 8a in the main body case 1 is heated and then blown out in a downward direction substantially perpendicular to the axis P. Even in this type of hair dryer, hot air can be blown out from the outlet grille 13 at a substantially uniform constant temperature by simply providing the wind shielding wall 14 at a predetermined location of the outlet grille 13. There are advantages.

〔Example〕

An embodiment of the hair dryer according to this invention will be described below with reference to FIGS. 1 to 4.

The main body case 1 has a cylindrical shape elongated in the front and back direction, and is formed by integrally joining left and right cases 1a and 1b against each other. Approximately the rear half of the main body case 1 in the front-rear direction is a grip part, and inside this grip part, a motor 3 and an axial fan 4 are arranged in the front and back. It has a suction port 6 at the rear end.

A heat generating part 7 is arranged in front of the motor 3 inside the main body case 1 at approximately the center in the front-rear direction. The fan 4, the motor 3, and the heat generating part 7 are all arranged along the axis P of the main body case 1. The heat generating section 7 is constructed by assembling a horizontal substrate 8a and a vertical substrate 8b having insulating properties in a cross shape orthogonal to each other, wrapping a heater wire 9 around this, and surrounding the outer periphery of the heater wire 9 with a metal heat shield tube 1.
It will be covered with 0.

A hot air outlet 11 is formed on the lower surface side of substantially the front half of the main body case 1 over substantially the entire length in the front and rear direction, and has a substantially uniform opening width in the front and rear direction.

The heat shielding cylinder 10 has a front end 10a of its top wall inclined forwardly downward, and its vertical front wall 10b is located at the front end position within the hot air outlet 11, and a bottom wall 10c is formed at the bottom wall 10c. The opening 10d faces the hot air outlet 11. The length of the bottom opening 10d of the heat shield tube 10 in the front-rear direction is shorter than the length of the hot air outlet 11 in the front-rear direction, and the bottom opening 10d is disposed inside the warm air outlet 11 so as to be biased toward the front. Ru.

The horizontal board 8a, which divides the interior of the heat shield cylinder 10 into upper and lower parts, extends forward until its front end is located approximately in the center of the hot air outlet 11 in the front-rear direction. Also,
The front end 10e of the bottom wall 10c, which covers up to the front end of the heater wire 9 wound around the horizontal substrate 8a, faces an intermediate position between the front end of the horizontal substrate 8a and the rear edge 11a in the hot air outlet 11. Furthermore, the front end of the vertical substrate 8b that partitions the inside of the heat shield cylinder 10 into left and right sides is the bottom wall 1.
It extends forward until it is located a little forward of the front end 10e of 0c.

A metal outlet grill 13 having an arc-shaped cross section and a large number of ventilation holes 12 is fitted into the hot air outlet 11, and a brush 15 is detachably attached to the outside of the grill 13 as an attachment. The brush 15 has a large number of bristles 17 planted in a brush mounting frame 16 with an arcuate cross section that is detachable from the edge of the hot air outlet 11, and a ventilation hole 18 communicating with the ventilation hole 12 is provided between each brittle 17. ing.

The outlet grille 13 has a large number of ventilation holes 12 arranged in rows at a predetermined pitch in the front, back, left and right directions. A portion of the bottom wall 10c of the heat shielding tube 10 corresponding to the lower side of the front end 10e is configured as a wind shielding wall portion 14 which is left as a blind wall without opening the ventilation hole 12.

In such a case, the fan 4 is rotated by the motor 3, and the air sucked in by the fan 4 from the suction port 6 flows into the heat shield cylinder 10, is heated by the heat generating part 7, and then hits the front wall 10b. The air then changes its flow in a downward direction perpendicular to the axis P and is blown out from the ventilation holes 12 of the blow-off grille 13. At this time, heat shield cylinder 10
The hot air blown directly below from the front end 10e of the bottom wall 10c tends to reach the highest temperature, but this hot air does not come out immediately from the ventilation hole 12, but collides with the inner surface of the wind shield wall 14 and spreads. However, the air is mixed with hot air at a lower temperature to approximate a uniform temperature distribution, and then blown out from the ventilation holes 12. In this case, if the inner surface of the wind shielding wall portion 14 is formed into a concave surface, the hot air will be more easily diffused along the concave surface. For example, if the inner surface of the wind shielding wall 14 is flat as shown in FIG. 8a, or if it is formed into a convex surface as shown in FIG. 8b, the above-mentioned hot air diffusion effect Because of this, the hot air immediately blows out at a high temperature from the ventilation hole 12 closest to the wind shield wall 14, which is undesirable.

[Another example]

In the above embodiment, the wind shield wall 1 of the outlet grill 13
4 is constructed as a blind wall, but instead of this, as shown in FIG. 5, holes 19 having a diameter smaller than that of the ventilation holes 12 are provided in the wind shielding wall portion 14 to increase the flow resistance. Good too. Further, as shown in FIG. 6, the wind shielding wall portion 14 may be formed in an elliptical shape in accordance with the temperature isotherm m.

Further, in the above embodiment, the entire air outlet grille 13 is formed to have an arcuate cross section, and the inner surface of the wind shielding wall portion 14 is formed into a concave surface. As shown in FIG. 2, the hot air diffusion effect can be obtained even if only the inner surface of the wind shielding wall 14 is formed into a concave surface shape of a circular arc, a square, or a double circular arc.

[Brief explanation of drawings]

1 to 4 show an embodiment of the hair dryer according to this invention, FIG. 1 is a schematic cross-sectional view of the main part, FIG. 2 is a detailed cross-sectional view of the main part,
FIG. 3 is a longitudinal sectional view of the whole, and FIG. 4 is an internal plan view of the outlet grill. FIG. 5 and FIG. 6 are both internal plan views of an outlet grill showing another embodiment of this invention. 7a, b, and c are all sectional views of an outlet grille showing still another embodiment of this invention. FIGS. 8a and 8b are both sectional views of an outlet grille showing a comparative example with this invention. 9th
The figure is a schematic diagram showing a conventional hair dryer. 1...Main case, 11...Warm air outlet, 12
... Ventilation hole, 13 ... Air outlet grill, 14 ... Wind shield wall, 15 ... Brush.

Claims (1)

[Scope of claims for utility model registration] (1) Inside the main body case 1, there is an axis P in the longitudinal direction of the main body case 1.
A wind flow path is formed through which hot air flows toward the front of the case, and a warm air outlet is provided on the lower surface side of the front end of the main body case 1 from which hot air is blown only in a downward direction substantially perpendicular to the axis P. 11 are opened with approximately the same opening width in the front-rear direction, and a horizontal board 8a is disposed in the air flow path that divides this flow path into upper and lower parts approximately equally, and the front end of the horizontal board 8a is connected to the hot air outlet 11. The horizontal substrate 8a extends to approximately the center position in the front-rear direction, covers the bottom side of the air flow path, and is connected to the horizontal substrate 8a.
The front end 10e of the bottom wall 10c, which covers up to the front end of the heater wire 9 wound around the heater wire 9, faces an intermediate position between the front end of the horizontal board 8a and the rear edge 11a of the hot air outlet 11. In a hair dryer in which an outlet grille 13 having a large number of ventilation holes 12 is fitted into a hair dryer 11, hot air is not allowed to pass through the hottest air region of the outlet grille 13 facing the front end 10e of the bottom wall 10c. A hair dryer characterized by forming a wind shielding wall part 14 that makes it difficult to pass through. (2) The hair dryer according to claim 1, wherein the inner surface of the wind shielding wall portion 14 is formed into a concave surface. (3) The hair dryer according to claim 1, wherein the wind shielding wall portion 14 is a blind wall. (4) A hole 19 smaller in diameter than the ventilation hole 12 in the wind shield wall 14
Claims 1 for utility model registration
Hair dryer as described in section.