Electromagnetic wave multi-reduction hair dryer

Abstract

Disclosed is an electromagnetic wave multi-reduction hair dryer. The hair dryer of the present invention comprises a heater unit in which two or more heating wires are wound in a bundle at the front end of an inner space of a body part connected to a nozzle part. The heater unit comprises: a cylindrical housing case; a cylindrical first insulator inserted into the case and made of mica; a cylindrical permalloy layer inserted into the first insulator to shield an electric field; a hollow cylindrical second insulator inserted into the permalloy layer and made of mica; and two or more heating wires inserted into the hollow of the second insulator to heat a bobbin. By configuring the heater unit in this manner, electromagnetic waves are blocked by means of multiple layers, thereby minimizing damage to the human body caused by the emission of electromagnetic waves.

Description

Electromagnetic wave multi-reduction hair dryer

[0001] The present invention relates to a hair dryer, and more particularly, to an electromagnetic wave reduction hair dryer capable of blocking electromagnetic waves in multiple ways using a reverse current pattern configuration, a parallel circuit pattern, and finally, permalloy to reduce electromagnetic waves of the hair dryer.

[0002] In general, a hair dryer is an electronic device that blows hot air to dry or style wet hair. Because it produces strong wind and heat, it can quickly dry or style hair. Nowadays, various types of hair dryers are widely used.

[0003] However, the heating device of the conventional hair dryer uses a coiled nichrome wire to spray high-temperature hot air, which not only generates a significantly high level of harmful electromagnetic waves and has a negative impact on the user's health, but also causes problems such as a significant increase in harmful electromagnetic waves as it uses a current of approximately 1,800 W or more.

[0004] These hair dryers are equipped with a blower fan and a motor, and can be classified into rotary and propeller hair dryers depending on the shape of the blower fan.

[0005] Fig. 1 is an exploded perspective view showing an example of a conventional pistol-type, propeller-type hair dryer. The pistol-type body is largely divided into a handle (1) and a barrel, and the barrel is divided into a front part (3) and a rear part (2) based on the position where the handle (1) is coupled. A heater (8) such as an electric heating wire is coupled to the front part (3), a blower (7) is coupled to the rear part, and a control switch (5) for the blower (7) and the heater (8) is installed in the handle part (1). The switch (5) and the heater (8), and the switch (5) and the blower (7) are connected by wires within the body, and a circuit board forming a control circuit can be installed along the path thereof. The illustrated drawing reference numeral 4 denotes a blower nozzle (4) connected to an air vent, and the illustrated drawing reference numeral 9 denotes an air intake cover (9) installed in the rear intake of the rear part.

[0006] In another example, the front part of the grip and the front part of the barrel may be formed as one piece in a pistol-shaped body, and the rear part of the grip and the rear part of the barrel may be formed as one piece to combine these two parts, and the installation of the parts may be similar to the example of Fig. 1.

[0007] However, conventional hair dryers, such as the above, are not designed to shield electromagnetic waves generated when they operate. Electromagnetic waves generated by hair dryers are divided into electric and magnetic fields. Electric fields, as the human body is composed of 70% water, allow electric currents to pass through the skin, and interfere with the weak current flow in the body. This interferes with the ion flow of cell membranes in tissues such as blood cells, reproductive organs, and lymph nodes where cell proliferation is rapid, causing various diseases. Magnetic fields, on the other hand, have the property of penetrating all substances, and suppress the production of melatonin, an immune substance secreted by the pineal gland in the brain and liver, weakening the immune system and causing various diseases. Furthermore, all conventional hair dryers do not have a grounding structure to prevent electric shock accidents, and they are not designed to dissipate electric fields and shield magnetic fields.

[0008] A hair dryer having a structure capable of reducing some electromagnetic waves is disclosed in Fig. 2. In a hair dryer (10) in which a cylindrical housing (11) is equipped with a heating wire heater (20) and a blower fan (30) driven by a motor (31), and when a switch (12a) mounted on a handle (12) is turned on, the heating wire heater (20) generates heat and the blower fan (30) rotates to inject hot air through the outlet (11a) of the housing (11), a ceramic heating element (40) having ventilation holes (40a) is mounted in front of the heating wire heater (20), and "ring"-shaped electrodes (41) are mounted on the front and rear surfaces of the ceramic heating element (40) to generate heat when power is applied, and a "╋"-shaped blower guide (50) is mounted in front of the ceramic heating element (40) to guide hot air toward the outlet (11a), and a bimetal sensor (51) is mounted on the blower guide (50). It is configured to turn the power of the heater on and off by connecting to the terminal (41a) of the electrode (41).

[0009] In addition, the ceramic heating element (40) containing a metal component in the mineral component is quickly heated when power is applied, consuming about 1,100 W of current, and the power consumption is minimized due to the effect of accumulating heat, so that a significant energy saving effect can be obtained, and at the same time, the generation of electromagnetic waves is minimized in the electric heating element (20) that uses the heat generated when supplying driving current to the motor (31) for ventilation by lowering the voltage, so that the harmfulness of electromagnetic waves can be minimized, and since the heat generated in the electric heating element (20) is used for ventilation, the energy grade efficiency can be increased. However, since the head dryer of Fig. 2 uses a ceramic heating element and a voltage-dropping electric wire heater together, it is configured to obtain high thermal efficiency even at low power consumption, and to obtain effects such as reduction of electromagnetic waves and generation of negative ions, but in reality, since it uses relatively little current, the voltage is dropped, and the heat generated when supplying driving current to the motor is utilized for blowing, so there is a problem in that the actual electromagnetic wave attenuation effect cannot be expected because it is configured to minimize the generation of electromagnetic waves from the electric wire heater.

[0010] Looking at the graph of electromagnetic wave exposure from conventional electrical products in Fig. 3 (surveyed by Seoul Metropolitan Government and Dankook University Electromagnetic Research Institute), among the 11 products surveyed, the products that emitted electromagnetic waves exceeding the human body protection standard were microwave ovens, hair dryers, and hot water mats, while the products that did not exceed the standard but emitted the next strongest electromagnetic waves were hand dryers, IH electric pressure rice cookers, vacuum cleaners, and air purifiers, in that order. Referring to the diagram, it can be seen that among the products that emitted electromagnetic waves exceeding the human body protection standard, the hair dryer was the one that exposed the most electromagnetic waves.

[0011] The electromagnetic wave human protection standards for domestic electrical appliances are 4,166 V / m (volts per meter) for an electric field and 83.3 μT (microtesla) for a magnetic field at 60 Hz (Hertz). However, the results of this measurement show that the maximum electric field intensity of the hair dryer was 616.06 V / m and the maximum magnetic field intensity was 98.82 μT, indicating that there is a problem in that the magnetic field intensity exceeds the human protection standards by about 20%. Therefore, there is an urgent need to develop a hair dryer with an electromagnetic wave shielding structure that can dissipate the electric field and shield the magnetic field so that users can use it safely.

[0012] The present invention aims to provide an electromagnetic wave multi-reduction hair dryer capable of repeatedly blocking multiple electromagnetic waves.

[0013] In addition, another object of the present invention is to provide an electromagnetic wave multi-reduction hair dryer capable of blocking electromagnetic waves in multiple ways by using two or more electromagnetic wave blocking technologies, such as a pattern configuration of a reverse current method, a circuit pattern of a parallel configuration, and a permalloy shield.

[0014] In addition, another object of the present invention is to provide an electromagnetic wave multi-reduction hair dryer capable of blocking electromagnetic waves by winding two heating wires at a certain interval around a bobbin.

[0015] In addition, another object of the present invention is to provide an electromagnetic wave multi-reduction hair dryer capable of blocking electromagnetic waves by configuring a coaxial cable with permalloy as an electromagnetic wave shielding material.

[0016] Another object of the present invention is to provide an electromagnetic wave multi-reduction hair dryer that can inform whether electromagnetic waves are generated using a display.

[0017] The electromagnetic wave multi-reduction hair dryer according to the present invention comprises a nozzle part that serves as a passage through which blown air and hot air are emitted to dry hair, a heater part in which two or more heating wires are wound in a bundle at a front end of an internal space of a body part connected to the nozzle part, a blower fan and a motor that forcibly suck in outside air through an intake hole and blow it inwardly forward, a handle part that allows the hair dryer to be held by hand, a power cord that is connected to the lower end of the handle part of the body part and is connected to a general power socket to receive power, and a switch part that is formed in the handle part and allows the air flowing out through the nozzle part to be selected as blown air, hot air, or strong air, and the heater part comprises a cylindrical housing case, a first insulator that is cylindrically inserted into the case and is made of mica, a permalloy layer that is cylindrically inserted into the first insulator and shields an electric field, a second insulator that is hollow and cylindrical and is made of mica and is inserted into the cylindrical permalloy, and the second It is characterized by including two or more heating wires inserted into the hollow space of the insulator to heat the bobbin.

[0018] The electromagnetic wave multi-reduction hair dryer of the present invention has the effect of minimizing damage to the human body caused by electromagnetic wave emission because it blocks electromagnetic waves in multiple ways. In addition, the electromagnetic wave multi-reduction hair dryer of the present invention has the effect of effectively blocking electromagnetic waves because it dually uses two or more electromagnetic wave blocking technologies, such as a reverse current method pattern configuration and permalloy shielding or a parallel configuration circuit pattern and permalloy shielding. In addition, the electromagnetic wave multi-reduction hair dryer of the present invention has the effect of efficiently blocking electromagnetic waves because two strands of heating wire are wound around a bobbin at a certain interval to block electromagnetic waves. In addition, the electromagnetic wave multi-reduction hair dryer of the present invention has the effect of effectively blocking residual electromagnetic waves because the permalloy is configured as a coaxial cable to block electromagnetic waves. In addition, the electromagnetic wave multi-reduction hair dryer of the present invention has the effect of safely using the hair dryer because the status of electromagnetic wave generation can be checked using a display.

[0019] Figure 1 is a drawing illustrating a conventional hair dryer.

[0020] Figure 2 is a drawing illustrating a hair dryer according to another conventional embodiment;

[0021] Figure 3 is a graph that investigates the electromagnetic wave exposure of electrical products.

[0022] Figure 4 is a partial perspective view of an electromagnetic wave multi-reduction hair dryer according to one embodiment of the present invention.

[0023] Figure 5 is an enlarged cross-sectional view of the heater part of the present invention.

[0024] Figure 6 is a graph of magnetic wave generation according to heater wiring.

[0025] Figure 7 is a drawing for explaining whether electromagnetic waves are generated according to the first circuit connection.

[0026] Figure 8 is a drawing for explaining whether electromagnetic waves are generated according to the second circuit connection.

[0027] Figure 9 is a drawing for explaining whether electromagnetic waves are generated according to the third circuit connection.

[0028] Figure 10 is a main configuration diagram of an electromagnetic wave multi-reduction hair dryer according to an embodiment of the present invention, and

[0029] Fig. 11 is a flow chart for explaining the operation of an electromagnetic wave multi-reduction hair dryer according to one embodiment of the present invention.

[0030] The advantages and features of the present invention and the methods for achieving them will become clear with reference to the embodiments described in detail below together with the accompanying drawings.

[0031] Hereinafter, the present invention will be described in detail with reference to the attached drawings.

[0032] The present invention is characterized in that it effectively blocks electromagnetic waves by dually using two or more electromagnetic wave blocking technologies, such as a reverse current method pattern configuration and permalloy shielding or a parallel configuration circuit pattern and permalloy shielding.

[0033] In addition, the present invention has another feature in that it effectively blocks electromagnetic waves between two heating wires by configuring them to be wound around a bobbin with two heating wires having currents flowing in opposite directions spaced apart at a certain interval.

[0034] In addition, the present invention has another feature in that it can effectively block residual electromagnetic waves that have been initially attenuated by configuring permalloy as a coaxial cable and insulating the front and back surfaces of the permalloy with mica through a pattern configuration.

[0035] Another feature of the present invention is that it displays electromagnetic waves generated from a hair dryer, thereby enabling the hair dryer to be used safely.

[0036] Referring to a partial perspective view of an electromagnetic wave multi-reduction hair dryer according to an embodiment of the present invention in FIG. 4, the electromagnetic wave multi-reduction hair dryer of the present invention includes a nozzle part (90) that serves as a passage through which blown air and hot air are emitted to dry hair, a heater part (100) in which two or more heating wires are wound in a bundle and mounted on the front end of the internal space of a body part (20) connected to the nozzle part (90), a blower fan (40) that forcibly sucks in external air through an intake hole and blows it inwardly forward, and a motor (30).

[0037] In addition, it can be configured to include a handle part (22) that allows the hair dryer to be held by hand, a power cord (24) that is connected to the lower end of the handle part (22) of the body part (20) and is connected to a general power socket to receive power, and a switch part (250) that is formed in the handle part (22) and allows the air flowing out through the nozzle part (90) to be selected as one of blowing air, hot air, or strong air.

[0038] The hair dryer (10) of the above-described configuration is configured such that a handle (22) with a switch (200) attached thereto is formed at the lower part of a tube-shaped body (20), while a blower fan (40) is installed at the rear to suck in external cold air by the rotational force of a motor (30), and a heating unit (100) installed in front of the blower fan (40) converts cold air into hot air through the heat generation of the heating unit (100) and dries hair through a nozzle unit (90) via an exhaust passage (80).

[0039] At this time, the present invention uses a multi-electromagnetic wave attenuation configuration to generate a minimum of electromagnetic waves when the heating part is heated, so that the user of the hair dryer can use the hair dryer safely and securely without worrying about electromagnetic waves.

[0040] To this end, the heat unit (100) is configured to effectively block electromagnetic waves by dually using two or more electromagnetic wave blocking technologies, such as a reverse current method pattern configuration and permalloy shielding or a parallel configuration circuit pattern and permalloy shielding.

[0041] Referring to the enlarged cross-sectional view of the heater part of the present invention in FIG. 5, the heater part (100) of the present invention is configured to include a cylindrical housing case (160), a first insulator (150) made of mica and inserted in a cylindrical shape inside the housing case (160), a permalloy layer (140) cylindrically inserted inside the first insulator (150) to shield an electric field, a hollow cylindrical second insulator (130) made of mica and inserted inside the cylindrical permalloy layer (140), and two or more heating wires (120) inserted into the hollow portion of the second insulator (130) to heat a bobbin (110).

[0042] Referring to the drawing, a first heating wire (122) through which current flows in a first direction and a second heating wire (124) through which current flows in a second direction opposite to the first direction and configured to be spaced apart from the first heating wire (122) are wound in a bundle around the outer periphery of a bobbin (110).

[0043] At this time, the directions of the current flowing between the two heating wires are made to flow in opposite directions so that the electrostatic capacitance value is canceled out and the magnetic field is eliminated, and the resistors of the two heating wires are arranged to face each other in parallel but spaced apart by a certain distance.

[0044] In general, electromagnetic shielding efficiency (SE) is defined by the following formula.

[0045] SE = 10 log(Pi / Pt)

[0046] Here, Pi and Pt represent the power of the incident electromagnetic wave and the power of the transmitted electromagnetic wave, respectively. The electromagnetic shielding efficiency is described by the sum of the following three terms.

[0047] SE = SEA + SER + SEM

[0048] Here, SEA is a term due to absorption within the material, SER is a term due to reflection at the boundary of the shielding material, and SEM is a term due to multiple reflections of electromagnetic waves within the material.

[0049] Electromagnetic shielding in the far-field region occurs when the distance between the electromagnetic source and the shielding material is relatively long compared to the wavelength of the source. The shielding effectiveness in this region is calculated and measured using plane wave theory in electromagnetics. The specific expressions for the three terms in the above equation can be expressed as follows.

[0050] SEA = 8686 At

[0051] SER = 20 log|1+n|⌒2 / 4|n|

[0052] SEM = 20 log|1-exp(-2γt)(1-n)⌒2 / (1+n)⌒2|

[0053] Here, A is the absorption coefficient of the material, n is the complex refractive index, t is the thickness of the shielding material, and γ is the complex absorption coefficient. The above A, n, γ, etc. are physical quantities determined by the electrical conductivity, dielectric constant, and magnetic permeability of the sample. In general, materials with high electrical conductivity and dielectric constant exhibit high electromagnetic wave shielding efficiency.

[0054] Therefore, in order to increase the electromagnetic wave shielding efficiency, the hair dryer must be manufactured with a structure that can dissipate the electric field and shield the magnetic field.

[0055] Accordingly, the present invention is configured to shield electromagnetic waves in multiple ways by arranging the resistances of the two heating wires to face each other in parallel and spaced apart by a certain distance so that the current flowing between the two heating wires (122, 124) flows in opposite directions, thereby eliminating the magnetic field, and grounding the permalloy layer (140) to shield the electric field.

[0056] That is, the present invention effectively blocks electromagnetic waves between two heating wires by winding them on a bobbin with two heating wires having current flowing in opposite directions spaced apart at a certain interval.

[0057] The first insulator (150) and the second insulator (130) composed of mica operate to insulate the permalloy layer (140) that acts as a conductor, and the permalloy layer (140) is configured to absorb the electric field generated from the two heating wires (122, 124) and discharge it to the ground of the power supply terminal.

[0058] Permalloy is a nickel-iron alloy containing 35–80% nickel (Ni). Its properties are largely determined by the nickel content, so its selection depends on the intended use. Alloys containing approximately 50–80% nickel exhibit the highest magnetic permeability and form ordered lattice NiFe when cooled slowly. Rapid cooling above the order-irregular transformation temperature (approximately 500°C) suppresses the formation of ordered lattices, increasing magnetic permeability. Furthermore, magnetic properties are generally sensitive to mechanical deformation, requiring heat treatment after processing such as shearing. Permalloy D, which contains 35–40% nickel, boasts particularly excellent AC magnetic properties. Permalloy D, which contains 40–50% nickel, is suitable for use in relatively high magnetic fields. At 50% nickel, the hysteresis loop becomes square. Permalloy A, which contains 70–80% nickel, is a representative composition of 78.5% nickel. Rapid cooling yields very high magnetic permeability. Permalloy C is a alloy that achieves high permeability without rapid cooling by adding additional elements. Practical alloys with added Mo, Cr, and Mr for the purpose of improving performance as industrial materials are sold under names such as Superpermalloy. Those with high nickel content are used as core materials in weak magnetic fields, while those with low nickel content are used in strong magnetic fields.

[0059] In the present invention, 0.5t of permalloy containing 80% or more of Ni is used to configure the structure so that even a weak magnetic field can be absorbed.

[0060] This configuration of permalloy layer allows for secondarily blocking of residual electromagnetic waves that have been initially attenuated.

[0061] Below, the circuit wiring method of the two heating wires is explained with reference to the drawings.

[0062] Fig. 7 is a drawing for explaining whether electromagnetic waves are generated according to the first circuit connection, Fig. 8 is a drawing for explaining whether electromagnetic waves are generated according to the second circuit connection, and Fig. 9 is a drawing for explaining whether electromagnetic waves are generated according to the third circuit connection.

[0063] Referring to the reference drawing of Fig. 7, this is a drawing showing a reference circuit to explain the intensity of electromagnetic waves generated depending on the circuit wiring method. When 120 V / 12.5 A is applied to both ends of one heater (H1) connected in series to a power source so that 1500 W is consumed from the heater H1, an electromagnetic wave of approximately 280 to 300 mG is generated from the heater H1.

[0064] Based on this, by changing the circuit wiring method, the intensity of electromagnetic waves generated from the heater can be reduced.

[0065] For example, if you look at the drawing for explaining whether electromagnetic waves are generated according to the second circuit connection of Fig. 8, in the case where the circuit is configured in four stages in parallel, each heater can reduce the intensity of electromagnetic waves generated from one heating wire to 1 / 4 with 375W, 3.1A, and 75mG.

[0066] The first heating wire (122) and the second heating wire (124) are each connected in parallel with two heating coils, and the end of the heating coil into which the current of the first heating wire (122) is input and the end of the heating coil into which the current of the second heating wire (124) is input are configured to be electrically connected to each other, and the end of the heating coil into which the current of the first heating wire (122) is output and the end of the heating coil into which the current of the second heating wire (124) is output are configured to be electrically connected to each other, and one end of the permalloy is configured to be electrically connected to a ground wire, so that the respective heating coils are connected in parallel and at the same time the first heating wire (122) and the second heating wire (124) are also connected in parallel.

[0067] Specifically, heaters H1 and H2 are connected in parallel to form a first heating wire (122), and heaters H3 and H4 are connected in parallel to a second heating wire (124) so ​​that each heater consumes 375 W. When 120 V and 12.5 A are supplied to both ends of the heaters, each of the four heaters generates heat while consuming 3.11 A and generates electromagnetic waves of 75 mG.

[0068] In the end, since each of the four heaters consumes 375W, it is the same as the heat generation of 1500W, and since the electromagnetic waves generated from each heater are 75mG, which is less than the electromagnetic waves (300mG) generated from a single heater consuming 1500W, there is an effect of reducing the electromagnetic waves.

[0069] In addition, Fig. 9 is a drawing for explaining whether electromagnetic waves are generated according to the third circuit connection. The first heating wire (122) indicated as H1 and the second heating wire (124) indicated as H2 are connected in parallel, and the electromagnetic waves generated from the entire heating wire were measured to be 17 mG with each heater at 750 W.

[0070] Specifically, the first heating wire (122) and the second heating wire (124) are each formed by folding a heating coil connected in series in half and placing it so that it faces each other in parallel, and the end of the heating coil where the current of the first heating wire (122) is output and the end of the heating coil where the current of the second heating wire (124) is input are electrically connected to each other, and the end of the heating coil where the current of the first heating wire (122) is input and the end of the heating coil where the current of the second heating wire (124) is output are electrically connected to each other.

[0071] Specifically, heater H1 is configured as a first heating wire (122) by folding one heating coil in half so that the directions of current are opposite to each other, and heater H2 is also configured as a second heating wire (124) by folding one heating coil in half so that the directions of current are opposite to each other.

[0072] In addition, as described above, since the first heating wire (122) and the second heating wire (124) are configured so that the directions of the current are opposite, the heating coil (H1) in the first heating wire (122) is also folded in half and configured so that the directions of the current are opposite to each other, so that the directions of the current flow in opposite directions, the electrostatic capacitance values ​​are canceled, and the magnetic field is first canceled, and the heating coil (H2) in the second heating wire (124) is also folded in half and configured so that the directions of the current flow in opposite directions, so that the electrostatic capacitance values ​​are canceled, and the magnetic field is first canceled.

[0073] And since the first heating wire (122) and the second heating wire (124) are configured so that the current direction is opposite, and the resistors of the two heating wires are arranged to face each other in parallel, the current direction flows in opposite directions, so that the electrostatic capacitance value is canceled out, and the magnetic field is secondarily extinguished.

[0074] As described above, the present invention cancels out primary electromagnetic waves by using a combination of heating coils and cancels out secondary electromagnetic waves by using a permalloy layer.

[0075] Meanwhile, according to the present invention and the electromagnetic wave multi-reduction hair dryer of the present invention, the hair dryer can be configured to be used safely by informing the status of electromagnetic wave generation using a display.

[0076] Referring to the main configuration diagram of the electromagnetic wave multi-reduction hair dryer according to an embodiment of the present invention of FIG. 10 and a partial perspective view of the electromagnetic wave multi-reduction hair dryer according to an embodiment of the present invention of FIG. 4, the electromagnetic wave multi-reduction hair dryer according to the present invention comprises a display unit (240) that displays the operating status of the electromagnetic wave multi-reduction hair dryer of the present invention and simultaneously displays whether there is an abnormality in the detected magnetic wave, an alarm sound generating unit (230) that generates an alarm sound when an abnormal magnetic wave is detected, an electromagnetic wave detecting unit (220) that detects the intensity of the magnetic wave of the hair dryer, and a control unit (210) that compares the magnetic wave detected by the electromagnetic wave detecting unit (220) with a reference value stored in the storage unit (160) and displays the normal or abnormal or the intensity of the detected magnetic wave on the display unit (240) or, if abnormal, controls the alarm sound generating unit (230) to emit an alarm sound.

[0077] In addition, a switch unit (250) including a power on / off button, a heat cutoff button, a wind volume control button, a temperature control button, etc. is configured, and the control unit (210) can control the system by operating the switch unit (250).

[0078] The operation of the electromagnetic wave multi-reduction hair dryer of the present invention is described using the above-described configuration.

[0079] FIG. 11 is a flow chart for explaining the operation of an electromagnetic wave multi-reduction hair dryer according to one embodiment of the present invention. As shown, when the power switch is turned on in the switch unit (250), the control unit (210) supplies power to the system and moves to a standby state (S210).

[0080] In the standby state of step S210, it is determined whether there is a key input through the switch unit (250) (S220), and if a key is input, the corresponding key data is processed (S230).

[0081] When it is determined that there is no key input in step S220 or when processing key data entered in step S230, the control unit (210) receives the intensity of the electromagnetic wave detected by the electromagnetic wave detection unit (220) and determines whether there is an abnormality in the electromagnetic wave (S240).

[0082] The presence or absence of an abnormality in the electromagnetic wave is determined as normal or abnormal by comparing the intensity of the detected electromagnetic wave with the reference value stored in the storage unit (160).

[0083] When an electromagnetic wave abnormality is detected in step S240, the control unit (210) controls the display unit (240) to display that an abnormality has occurred or to emit a warning sound through the warning sound generating unit (230) (S250).

[0084] The presence or absence of an abnormality and a warning sound can be displayed in various forms on the display unit (240) so that the user can recognize that an abnormality has occurred.

[0085] In addition, even though the user's attention is alerted to the presence of an abnormality and a warning sound is generated in step S250, if the hair dryer continues to operate for a certain period of time (30 seconds) (S260), a warning sound indicating "power will be cut off" is displayed on the display unit (240) or a warning sound generating unit (230) is guided, and the power can be cut off to terminate the operation (S270).

[0086] As described above, according to the electromagnetic wave multi-reduction hair dryer of the present invention, since it blocks electromagnetic waves in multiple ways, it can minimize damage to the human body caused by electromagnetic wave emission, and since it uses two or more electromagnetic wave blocking technologies such as a reverse current method pattern configuration and permalloy shielding in duplicate, it can effectively block electromagnetic waves, and since the status of electromagnetic wave generation can be known using a display, there is an effect that allows the hair dryer to be used safely.

[0087] The electromagnetic wave multi-reduction hair dryer according to the present invention can be applied to hair drying.

Claims

1. Nozzle section that acts as a passage through which blown air and hot air are emitted to dry the hair; A heater unit in which two or more heating wires are wound in a bundle and mounted on the front end of the internal space of the body unit connected to the nozzle unit; A blower fan and motor that forcibly sucks in outside air through the intake port and blows it toward the front inside; A handle part that allows the hair dryer to be held by hand, a power cord that is connected to the lower end of the handle part of the body part and is connected to a general power socket to supply power, and a switch part that is formed on the handle part and allows the air flowing out through the nozzle part to be selected as one of blowing air, hot air, or strong air; Including, The above heater part Cylindrical housing case; A first insulator made of mica and inserted cylindrically inside the case; A permalloy layer inserted in a cylindrical shape inside the first insulator to shield the electric field; A second insulator made of mica and having a hollow cylindrical shape inserted inside the cylindrical permalloy; and An electromagnetic wave multi-reduction hair dryer comprising two or more heating wires inserted into the hollow of the second insulator to heat the bobbin.

2. In claim 1, An electromagnetic wave multi-reduction hair dryer characterized in that the two heating wires are wound in a bundle around the outer periphery of a bobbin, the first heating wire having a current flowing in a first direction and the second heating wire having a current flowing in a second direction opposite to the first direction and configured to be spaced apart from the first heating wire.

3. In claim 3, An electromagnetic wave multi-reduction hair dryer in which the first and second heating wires are each formed by folding a heating coil connected in series in half and arranging it so that it faces each other in parallel, and an end of the heating coil from which the current of the first heating wire is output and an end of the heating coil from which the current of the second heating wire is input are electrically connected to each other, and an end of the heating coil from which the current of the first heating wire is input and an end of the heating coil from which the current of the second heating wire is output are electrically connected to each other, and one end of the permalloy layer is electrically connected to a ground wire.

4. In claim 3, An electromagnetic wave multi-reduction hair dryer in which the first heating wire and the second heating wire are each configured to have two heating coils connected in parallel, an end of the heating coil into which the current of the first heating wire is input, and an end of the heating coil into which the current of the second heating wire is input are electrically connected to each other, an end of the heating coil into which the current of the first heating wire is output, and an end of the heating coil into which the current of the second heating wire is output are electrically connected to each other, and one end of the permalloy is configured to be electrically connected to a ground wire.

5. In claim 3 or 4, Display section; Beep sound generator; magnetic wave detection unit; and An electromagnetic wave multi-reduction hair dryer that draws the user's attention, including a control unit that compares the magnetic wave detected by the magnetic wave detection unit with the reference value stored in the storage unit and displays normal or abnormal values ​​on the display unit or, if abnormal, emits a warning sound through the warning sound generating unit.

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