KR830001752B1 - Infrared heating hair dryer - Google Patents

Abstract

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Description

Infrared heating hair dryer

1 is a cross-sectional view of the dryer of the present invention.

2 is a schematic diagram of a silicon carbide igniter useful for the dryer of FIG.

FIG. 3 is an exploded perspective view showing various components of the FIG. 1 dryer.

FIELD OF THE INVENTION The present invention relates to hair dryers, and more particularly to hair dryers using a low speed air stream that removes an infrared wavelength in the selected range and a hydrophobic layer on the hair to dry the hair.

Conventional hair dryers using infrared heaters have the disadvantage of using large infrared lamps. Such hair dryers also dissipate excessive heat to the hair in normal hair drying conditions. For example, when the hair dryer is 2.54 cm away from the hair, the hair dryer emits heat at a temperature of 230 ° C there. The hair dryer does not use the infrared wavelength in the selected range to dry the hair.

It has been found desirable to avoid frequent exposure of hair to high temperatures. The use of hair dryers has become frequent due to variations in hairstyles and habits. The hair dryer of the present invention releases heat at a temperature of about 90 ° C. at such distances from the hair and this heat is very sufficient for hair drying because of the properties of the dryer described below.

According to the present invention there is provided a hair dryer comprising means for sending air out of the dryer and a hair dryer having an infrared radiation source, the means for limiting the energy emitted from the dryer to a wavelength of 0.8 μ or more. . Dryers of the preferred form of the present invention are anodized to modulate the radiated energy by reflecting only selected wavelengths, a fan for sending air out of the dryer at a relatively low rate, an infrared energy source for emitting infrared light from the dryer, ) A filter that further narrows the reflector and the radiation infrared to the required wavelength range. A suitable source of infrared energy is the silicon carbine igniter sold under the trademark "Grovar" under the "Carborundum Company", with an anodized black parabolic reflector as the reflector.

In accordance with the present invention, the inventors have found that in order to dry the wet hair most effectively with an infrared hair dryer, the infrared wavelength emitted from the dryer must be within a wavelength range close to the maximum absorption value of the infrared hair. They also found that the heat felt on the skin of the hair at this wavelength was significantly less than at shorter wavelengths of infrared energy. This wavelength range includes the most intense infrared absorption range of molar molecules and hair.

Suitable infrared wavelengths for this criterion are usually about 0.8μ or more. Wavelengths of about 10μ to 25μ are absorbed by wet hair and dry hair, but as the wavelength increases, drying becomes more ineffective. The present inventors therefore prefer infrared rays to wavelengths from about 0.8 microns to about 10 microns for the purposes of the present invention. The maximum infrared absorption of wet hair is in the wavelength bands of about 2-3μ and 6-8μ, and the most effective drying occurs when infrared rays in this wavelength range are emitted from the dryer at the same time.

Dry hair absorbs very little infrared light and absorbs visible light very well. Thus, another advantage of the present invention is that when hair is dried, especially from the outer layer to the inner layer, radiant energy is transferred from the outer layer to the inner layer to aid in the drying process. Part of the heat of vaporization is provided by the body temperature of the hair skin, resulting in cooling protection for the hair skin. When the hair dries (besides scattering and reflection) a lot of energy reaches the hair skin and the cooling effect of vaporization is over. Thus, an increase in the detectable temperature of the hair skin indicates that the hair is currently dry.

Thus, the infrared energy reflected at the aforementioned wavelengths will be satisfactory for use in the present invention and will dry the hair at a temperature of about 90 ° C., which is significantly lower than at conventional customary temperatures. Common infrared energy sources emit visible light. Various devices can be used to limit these rays to the maximum absorption wavelength of wet hair. Suitable anodized aluminum parabolic reflectors in combination with infrared filters that pass the required wavelengths can be used. The reflector absorbs some of the visible and infrared light, and the filter can be chosen to primarily transmit only the required infrared wavelengths.

It is advisable to introduce a slower airflow and shake the hair for better penetration than light to help dislodge water vapor from the surface of the hair and break up water molecules without cooling and condensation to ensure complete drying at the shortest possible time at low temperatures. Do.

In FIG. 1, the dryer indicated by 10 comprises a housing 11, an outlet grill 12, a handle 13, and a switch 14 in the handle 13. A fan motor 15 is provided inside the dryer 10, and the motor operates a fan to blow low-speed air from the dryer to the outer rim runner of the grill 12. Between the pan and the grill is an infrared energy source that emits radiant heat to dry the hair. The air stream also takes heat by cooling the infrared energy source and maintaining it at operating temperature. This air flow assists in the effect of the hair drying operation because he prevents the formation of a vapor layer on the hair that encapsulates the water vapor from the surface of the hair and surrounds the hair from radiant heat. The low rate of airflow prevents the air from cooling and condensing water vapor.

The energy source is a silicon carbide igniter 17 sold by the Carborundum Company under the trademark "Grova". As shown in detail in FIG. 2, the igniter 17 includes an alumina fin 18, which is connected to one end of the alumina body member 19, shown in dashed lines, The body member is covered with a reconstituted silicon carbide film 20. Heaters in the form of electrical resistors have the ability to impinge up to about 982 ° C. (about 1800 ° F.) within 80 seconds. One commercial type of Grobar member is sold under the designation of type CD1, model 0206 D, which has a voltage of 80 ± VAC, current: 2.0-3.6 amps, heating capacity of up to 982 ° C within 60 seconds. Has performance.

Each end of the fin 18 is supported in a slot of the block 21 to prevent movement of the igniter. A member 22 in contact with the two electrical contact members 23a and 23b on the inner surface surrounds and covers the coated body member of the igniter. The contact members were connected to a garden for powering the switch 14 and the igniter.

A motor for operating in the dryer 10 of the present invention around the support, in which a heater board support 24 surrounds it in front of the coated body member of the igniter 17 as shown in detail in FIG. An open coil resistor 25 is arranged which is used to reduce the voltage of 15).

This support 24 also holds the parabolic reflector 26 anodized in the dryer 10 in place. This parabolic reflector 26 is made of aluminum and has a black tinted and anodized coating layer on its reflective surface to maximize the required wavelength of the infrared ray going forward and minimize the visible spectral rays pointing forward.

The reflector support 27 holds the reflector 26 in place in the dryer, and the infrared filter 28 is in contact with one surface of the support.

The filter 28 filters out most of the infrared radiation emitted from the dryer, except for infrared wavelengths greater than about 0.8μ, and is colored borosilicates sold by the Corning Glass Factory, New York, under the codename "7407." Made of observation glass.

The composition of the filter may be selected to emit infrared radiation of about 0.8 μ-10 μ or about 2-3 μ and 6-8 μ wavelengths. The grille 12 holds the lens 38 in place.

In operation of the dryer, air enters the housing by means of a fan 16 through a suitable inlet at the rear of the housing 11. The air passes over the back of the reflector 26 and enters at a low speed past the opening indicated by 29. The opening 29 is formed between the reflector 26 and the above-described support and housing structure.

Heat is applied to the igniter 17, which emits infrared light. As the air flows through the dryer 10, the air takes heat from the vaporizer 17 and the resistor 25. Infrared light from the igniter 17 reflected by the parabolic reflector 26 has a wavelength of about 0.8 mu mainly, and almost all remaining visible and infrared light is absorbed. Thus the airflow also takes heat from the reflector 26.

When the reflected infrared light is emitted from the dryer 10, its wavelength is further narrowed by the filter lens 28 to remove less desirable light rays. Thus, depending on the filter used for the characteristics used, infrared rays in the spectrum of wavelengths of about 0.8 μm or more, or about 0.8-10 μm, or about 2-3 μm and about 6-8 μm are obtained. Depending on the absorption characteristics of the filter, the reflector may be omitted completely. Alternatively, the need for a filter may be eliminated depending on the appropriate selective reflection characteristics of the reflector.

Infrared radiation, which has the maximum absorption of less hair, heats only the hair and the water on the hair to vaporize the water. Warm, low-speed air flows repel water vapor, preventing it from forming a layer on the hair, and protecting the hair from continuous radiation. Because the air is warm and moving at low speeds, it does not cool the hair and does not condense water vapor. The air protects the hair's skin from infrared and heat until the hair is completely dry.

Thus, in the dryer 10 of the present invention, infrared rays and air flows of selected wavelengths cooperate with each other to dry hair efficiently and relatively quickly at low temperatures. If only infrared drying is required, the opening 29 can be reconfigured to exhaust all air from the dryer 10 without going through the grill 12. In addition, the infrared energy source may be any other than the above-described igniter 17 as long as it can emit infrared rays of a suitable wavelength and can be applied to the hair dryer of the present invention.

Claims (1)

In the infrared heating hair dryer including a fan having a relatively low velocity of air from the housing and the dryer having an air inlet and an outlet and an infrared radiation source, the wavelength of the radiant energy emitted from the dryer is limited to a wavelength of 0.8 μ or more. Means comprising: a reflector 26 for reflecting infrared light of wavelengths greater than about 0.8 microns out of the dryer, and an infrared filter 28 for passing infrared light having a wavelength of greater than about 0.8 microns. Infrared heating hair dryer.

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