JPH04367609A - Hair drier - Google Patents

Abstract

PURPOSE:To prevent a pain of the hair of the head caused by overdrying by utilizing an extreme infrared radiation heat effect to the maximum, and also, to obtain the hair drier having high heat exchange efficiency. CONSTITUTION:The hair drier is constituted so that the outside diameter of a fan 4 is larger than the outside diameter of an extreme infrared radiation heater 5, and a flow of air is generated in both a passage (f) and a passage (g) of the outside and the inside of its extreme infrared radiation heater 5.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dryer that sends air in the axial direction of the fan and generates far-infrared rays to be used, for example, to dry hair.

0002

BACKGROUND OF THE INVENTION Hair dryers that utilize radiant heat from far infrared rays have been developed in recent years in order to prevent damage to hair caused by heat when drying hair. Conventional drying with hot air has the disadvantage that it is too dry, and also has the disadvantage that the hair is blown and spread out by the wind. To overcome this drawback, a hair dryer was developed that uses radiant heat from far infrared rays.

[0003] In such a hair dryer that uses far-infrared radiant heat, when a cylindrical far-infrared heater b is used and the light generated from the heater b is reflected by the reflector D, the heater b has a high temperature. Therefore, the upper part of the reflection plate D becomes high temperature due to heat due to convection, and it is necessary to cool it. Therefore, the conventional hair dryer that uses far-infrared radiant heat as shown in Fig. 2 has a cylindrical shape with an inclined surface, with one end serving as a blowout port C and the other end serving as a suction port d. A cylindrical case B is installed inside the case A, and a fan C is further installed inside the case B. The wind flowing into case B by fan C is the wind W1 from outside and case A.
There is a wind W2 flowing from the gap e between the case B and the case B, and the reflection plate D is cooled by taking this wind W2 into the case B.

0004

[Problem to be Solved by the Invention] Conventional hair dryers that utilize far-infrared radiant heat use a cooling means using a reflector as described above, but with such means, it is difficult to obtain high-velocity wind. Although this can shorten the time it takes to dry your hair, it tends to cause damage to your hair due to over-drying, and it also has the disadvantage that the wind speed blows your hair and spreads it out. There is also the problem that the heat exchange rate deteriorates due to the presence of areas with no flow.

[0005] In view of the above-mentioned problems, the present invention is to cool a far-infrared reflector to obtain a wide and gentle flow of wind, and to make maximum use of the radiant heat effect of far-infrared rays. To provide a hair dryer that prevents damage to the hair due to excessive drying and has a high heat exchange rate.

[0006]

[Means for Solving the Problems] In order to achieve the above-mentioned objects, the hair dryer according to the present invention includes a motor for sending air in an axial direction, and a motor that is coaxially mounted on the rotating shaft of the motor. A fan to be worn, a heater located downstream of the fan that generates far-infrared rays at high temperatures to add heat to the wind, and a funnel that reflects the far-infrared rays to the outside of the heater. In a hair dryer, a hair dryer is installed in a case with a sloped surface where the diameter of the outlet is the largest and the diameter around the fan is the smallest. The outer diameter of the far-infrared heater is increased to generate airflow both outside and inside the far-infrared heater.

[0007]

[Operation] The present invention is constructed as described above, and by making the outer diameter of the fan larger than the outer diameter of the far-infrared heater, a wide air flow is generated and the reflecting plate is cooled. In addition, by forming the far-infrared heater in a shape where the inner diameter decreases in the direction of the wind outlet, a decrease in the flow velocity at the center of the wind outlet can be prevented. It works to reduce variations in wind speed distribution as much as possible.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 shows a cross-sectional side view of a hair dryer according to the present invention, cut along the central axis. A case 1 made of synthetic resin and having an inclined surface X on its inner surface is provided with an air outlet 1b at one end and an inlet 1a at the other end. Inside the case 1, a motor 2, a rectifying blade 3 located around the motor 2, and a fan 4 mounted on the rotating shaft of the motor 2 for sending out air in the axial direction.

Between the fan 4 and the outlet 1b, a heater 5 having a cylindrical shape whose diameter gradually becomes smaller on the side of the outlet 1b that generates far infrared rays due to high temperature is installed coaxially with the motor 2. Installing. On the outside of the heater 5, in order to reflect the far infrared rays generated from the heater 5, a metal reflecting plate 6 having a cylindrical shape whose diameter gradually increases on the side of the air outlet 1b is attached to the case 1. It is installed by fixing it on the side of the air outlet 1b.

Outer diameter D1 of heater 5 on fan 4 side
is smaller than the outer diameter D2 of the fan 4, which is 0.6
It is desirable that D2≦D1≦0.8D2. In this way, the air flow path is changed to the flow path f on the outside of the heater 5.
and an inner flow path g. The wind flowing through the inner flow path g has a low velocity because it exits from the base of the fan 4, but the flow velocity increases because it is contracted along the cylindrical inner surface of the heater 5. On the other hand, since the wind flowing through the outer flow path f has a high velocity, it is expanded in the outer flow path f and the flow velocity decreases. When such a flow of wind occurs, the wind flowing through the flow path f on the outer side is heated by the heat generated from the heater 5 and cools the reflective plate 6 which is in a high temperature state.

FIG. 3 is a graph comparing the wind speed distribution of the hair dryer according to the present invention and a conventional hair dryer that utilizes far-infrared radiant heat, and the solid line indicates the wind speed distribution of the hair dryer according to the present invention. , and the dotted line indicates the wind speed distribution of a conventional hair dryer that uses far-infrared radiant heat.

0012

[Effects of the Invention] The hair dryer according to the present invention is constructed as described above and has the following effects. That is, when using a hair dryer,
This means that the wind speed or wind force is not too strong and has a suitable strength, making it gentle and comfortable to use on the hair, and not only can the temperature rise be moderately suppressed, but also the It has features such as significantly increasing the heat exchange rate.

[Brief explanation of the drawing]

FIG. 1 is a cross-sectional side view of a hair dryer according to the present invention, cut along the central axis.

FIG. 2 is a cross-sectional side view of a conventional hair dryer that uses far-infrared radiant heat, cut along the center axis.

FIG. 3 is a graph showing a comparison of wind speed distribution between the hair dryer according to the present invention and a conventional hair dryer that utilizes far-infrared radiant heat.

[Explanation of symbols]

1 Case 1a Suction port 1b Air outlet 2 Motor 3 Rectifier blade 4 Fan 5 Far-infrared heater 6 Reflection plate Air flow path g Air flow path inside the heater

Claims (2)

[Claims] [Claim 1] A motor for sending air in an axial direction, a fan coaxially attached to the rotating shaft of the motor,
A heater that generates far infrared rays at a high temperature to add heat to the wind is installed at a location downstream of the fan, and a funnel-shaped reflector plate that reflects the far infrared rays to the outside of the heater. In a hair dryer installed in a case equipped with an inclined surface where the diameter of the air outlet is the largest and the diameter around the fan is the smallest, the outer diameter of the fan is larger than the outer diameter of the far-infrared heater. A hair dryer that generates airflow both outside and inside the far-infrared heater. 2. The hair dryer according to claim 1, further comprising a far-infrared heater having a cylindrical shape with an inner diameter decreasing in an inclined direction toward the wind outlet.