JPH0638827A - Hair dryer - Google Patents

Abstract

PURPOSE:To provide a hair dryer provided with a temperature measuring means capable of precisely measuring hair temperature without touching the hair. CONSTITUTION:A hair dryer is provided with a temperature measuring means 1 for measuring hair temperature without touching the hair and a control means for controlling the temperature or amount of air blow according to the level of the hair temperature detected by the temperature measuring means. Further, cool air blowing parts 20, 21 for feeding cool air to the temperature measuring means are provided to prevent temperature of the temperature measuring means 1 from rising.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a hair dryer, and more particularly to a hair dryer having a temperature measuring means for measuring the hair temperature in a non-contact manner and controlling the air temperature and the air volume according to the output of the temperature measuring means. It is a thing.

[0002]

2. Description of the Related Art A hair dryer is provided with a monitoring means for monitoring the air temperature so that the air temperature does not become too high. However, if hot air is continuously applied to the same part of the hair, the air temperature will change. At a low temperature, the temperature of the hair rises more than necessary and becomes too dry, so that the hair is damaged. For this purpose, there is provided a temperature measuring means for measuring the temperature of hair in a non-contact manner, and controlling the air temperature or the air volume according to the level of the hair temperature detected by this temperature measuring means.
7-168605.

[0003]

In this case, since the control is performed based on the temperature of the hair, the risk of damaging the hair is reduced, but when the hair dryer is brought close to the hair, The discharged hot air may hit the temperature measuring means for measuring the hair temperature in a non-contact manner, and bounce back or convection from the hair, which may raise the temperature of the temperature measuring means itself. If such a situation occurs, the temperature measurement value of the hair due to non-contact will be inaccurate, and the above control will not be accurate according to the actual temperature of the hair.

The present invention has been made in view of the above circumstances, and an object thereof is to provide a hair dryer equipped with a temperature measuring means capable of accurately measuring the hair temperature in a non-contact manner. is there.

[0005]

SUMMARY OF THE INVENTION The present invention, therefore, provides a temperature measuring means for measuring the temperature of hair in a non-contact manner, and controls the air temperature or the air volume according to the level of the hair temperature detected by the temperature measuring means. The hair dryer having the control means for controlling the temperature has a first feature in that the temperature measuring means is provided with a cold air blowing section for sending cold air, and the temperature is measured according to the difference between the temperature of the temperature measuring means and the outside air temperature. It has a second characteristic in that it has a cooling member for cooling the measuring means, and has a third characteristic in that it has a constant temperature member for keeping the temperature measuring means at a constant temperature. When the radiant energy emitted from the lens is focused on the temperature detecting element by the lens to measure the temperature, the temperature for temperature correction of the output of the temperature detecting element is around the lens and the temperature detecting element in the temperature measuring means. With the detection member Particular has a fourth feature.

According to the first feature of the present invention, the cool air blown by the cool air blowing unit prevents the temperature of the temperature measuring means from rising, and the second feature of the present invention is cooling. According to the third characteristic, the temperature measuring means is cooled to a temperature substantially equal to the outside air temperature by the means, and the temperature measuring means is kept at a constant temperature by the constant temperature member and the fourth characteristic. According to the method, the output of the temperature measuring means is temperature-corrected according to the temperature of the temperature measuring means, and in any case, the hair temperature is accurately measured in a non-contact manner without being affected by the temperature change. can do.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described in detail below with reference to the illustrated embodiment. In this hair dryer, as shown in FIG. 1, a fan 3 driven by a motor 2 and a heater 4 for heating air blown by the fan 3 are provided. In addition to the above, the temperature measuring means 1 for measuring the hair temperature in a non-contact manner by detecting the radiant energy emitted by the hair and converting it into an electric signal is provided. Reference numeral 5 in the drawing denotes a nozzle that is detachably attached to the blower port. In addition to the power switch button 61, a drying / set changeover switch 62, an air temperature / air flow rate changeover switch 63, and a slide plate 64 for selectively operating both the switches 62, 63 are provided on the front surface of the handle portion. It is provided.

The temperature measuring means 1 comprises a heater 4 in a wind tunnel.
It is arranged below the part containing the. As shown in FIG. 2, the temperature measuring means 1 here includes a substrate 10 and
A temperature detecting element 11 composed of a pyroelectric element fixed on the substrate 10, a lens 12 attached to one end of the substrate 10 and focused on the temperature detecting element 11, and a space between the lens 12 and the temperature detecting element 11 is surrounded. Opening cylinder 13, temperature detection element 11
Is formed of a thermistor 14 for measuring the ambient temperature and a chopper mechanism 15 for periodically blocking the radiant energy incident on the temperature detecting element 11.

The chopper mechanism 15 is composed of a thin metal plate and has a vibrating plate 16 whose front end is bent to form a light shielding piece 17, and a vibrating plate 1 whose base end is fixed to the substrate 10.
6 is formed as a unimorph mounted on 6 or a Viborg oscillator (not shown), and the light shielding piece 17 in the diaphragm 16 always receives the radiant energy collected by the lens 12. Although it does not prevent the temperature detecting element 11 from entering the temperature detecting element 11, the light shielding piece 17 covers the front surface of the temperature detecting element 11 when the vibrating plate 16 is bent as shown by the broken line in FIG. Radiation energy is prevented from entering the temperature detection element 11. It should be noted that this light blocking is performed periodically.

The lens 12 that collects the radiant energy emitted from the hair to the temperature detecting element 11 has an angle θ between the optical axis before passing and the optical axis after passing, like the peripheral portion of the convex lens shown in FIG. Therefore, the temperature measuring area A in the temperature measuring means 1 is directed toward the air blowing direction from the air blowing port. In the illustrated example, the intersection of the blower axis and the temperature measurement area A is approximately 10 cm from the tip surface of the blower opening and 3 cm from the tip of the nozzle 5. For this reason, in this hair dryer, when the hair is heated by the hot air discharged from the air outlet, the part of the hair that is heated most by the hot air,
Since the part where the temperature is measured by the temperature measuring means 1 matches, the pain due to overheating of the hair can be reliably prevented by controlling the air temperature or the air volume by the temperature measuring means 1.

Here, the nozzle 5 of the hair dryer
When the tip is brought close to the hair, the warm air discharged from the hair dryer is reflected by the hair to heat the lens 12 in the temperature measuring means 1 and further heat the temperature detecting element 11 in the temperature measuring means 1. However, in the one shown in FIGS. 1 and 2, the ventilation passage 20 is provided between the rear end of the room in which the temperature detecting element 1 is housed and the housing portion of the fan 3 so that the cold air detects the temperature when the air is blown. It is made to flow into the storage portion of the element 1. Further, as shown in FIG. 2, since the outlet 12 for letting out the cold air that has flowed in is formed around the lens 12, not only the temperature detecting element 11 but also the lens 12 is cooled by the cold air. Therefore, the temperature of the temperature measuring means 1 does not rise due to the hot air discharged from the discharge port of the hair dryer. Therefore, the measured value of the hair temperature obtained by the temperature measuring means 1 in a non-contact manner is accurate without being affected by the temperature.

FIG. 4 shows another embodiment. Here, in the temperature measuring means 1, a temperature sensor 22 that measures the ambient temperature of the lens 12 that is first affected by warm air is provided, and a temperature sensor (not shown) that can measure the outside air temperature is used, for example. A cooling member 23, which is provided on the outer wall of the housing portion of the fan 3 and includes a Peltier element for cooling the lens 12 according to the temperature difference measured by both temperature sensors, is arranged near the lens 12. Lens 12
When the hot air hits, the temperature rises, but since the cooling member 23 cools only the amount of the warm air, the temperature is practically kept at the same temperature as the outside air temperature.

Instead of cooling the temperature measuring means 1, the temperature measuring means 1 may be always warmed to a predetermined temperature higher than the temperature heated by the repelled warm air. FIG. 5 shows a constant temperature member 25 for this purpose.
5A shows the case where the heater is arranged in the temperature measuring means 1. FIG. 5A shows the time when the light is not shielded, and FIG. 5B shows the time when the light is shielded. Shows the state of measurement. In the non-contact measurement of the hair temperature, a measurement error occurs when a temperature change occurs. For example, when the temperature is maintained at a constant temperature of 50 ° C. by the constant temperature member 25, the output of the temperature detection element 11 is By setting the control conditions for the heater 4 and the motor 2, it is possible to eliminate measurement errors.

FIG. 6 shows still another embodiment. Here, it is not dealt with by keeping the temperature of the temperature measuring means 1 constant, but the thermistor 14 that measures the temperature in the vicinity of the temperature detecting element 11 and the thermistor 26 that measures the temperature around the lens 12 are provided. By correcting the temperature of the output of the temperature detection element 11 according to the temperature difference between the thermistors 14 and 26, the influence of the temperature change is eliminated.

[0015]

As described above, according to the first aspect of the present invention, the cold air blown by the cold air blowing unit prevents the temperature of the temperature measuring means from rising. According to this, the cooling means cools the temperature measuring means to a temperature substantially equal to the outside air temperature.
The temperature measuring means is kept at a constant temperature by the constant temperature member. Therefore, in any case, the temperature measuring means is kept at a constant temperature without being affected by the discharged hot air. According to the fourth characteristic, the output of the temperature measuring means is temperature-corrected according to the temperature of the temperature measuring means, so that it is not affected by the temperature change. Yes, therefore, non-contact measurement of hair temperature can be accurately performed.

[Brief description of drawings]

FIG. 1 is a vertical sectional view of an embodiment.

FIG. 2 is an enlarged cross-sectional view of the temperature measuring means of the above.

FIG. 3 is an explanatory view of the same lens.

FIG. 4 is an enlarged cross-sectional view of temperature measuring means in another embodiment.

5 (a) and 5 (b) are perspective views of temperature measuring means in another embodiment.

FIG. 6 is an enlarged cross-sectional view of temperature measuring means in another embodiment.

[Explanation of symbols]

 1 temperature measuring means 11 temperature detecting element 12 lens 20 air passage

Claims (4)

[Claims] 1. A hair dryer comprising a temperature measuring means for measuring the temperature of hair in a non-contact manner and a controlling means for controlling the air temperature or the air volume according to the level of the hair temperature detected by the temperature measuring means. A hair dryer characterized by comprising a cold air blowing unit for sending cold air to the temperature measuring means. 2. A hair dryer comprising temperature measuring means for measuring the temperature of hair in a non-contact manner and control means for controlling the air temperature or the air volume according to the height of the hair temperature detected by the temperature measuring means. A hair dryer comprising a cooling member for cooling the temperature measuring means according to the difference between the temperature of the temperature measuring means and the outside air temperature. 3. A hair dryer comprising temperature measuring means for measuring the temperature of hair in a non-contact manner, and control means for controlling the air temperature or the air volume according to the level of the hair temperature detected by the temperature measuring means. A hair dryer comprising a constant temperature member for keeping the temperature measuring means at a constant temperature. 4. A hair dryer comprising temperature measuring means for measuring the temperature of hair in a non-contact manner, and control means for controlling the air temperature or the air volume according to the level of the hair temperature detected by the temperature measuring means. The temperature measuring means measures the temperature by condensing the radiant energy emitted from the hair on the temperature detecting element by the lens, and outputs the temperature detecting element around the lens and around the temperature detecting element in the temperature measuring means. A hair dryer characterized in that a temperature detecting member for temperature correction is provided.