KR101776982B1 - Method for Preventing Electromagnetic Wave From Generating In Heat Generation Member Using Direct Power And Heat Generating Products Using The Same - Google Patents

Abstract

A method of preventing generation of electromagnetic waves in a heating element using a DC power source including a heating element, a temperature sensor, a temperature control device (artificial intelligence IC), an ON / OFF switch function (FET IC), and a battery, When the temperature of the heating element reaches the preset off temperature, the power supply is turned off. When the temperature of the heating element is lowered and the temperature of the heating element is lowered to the predetermined temperature, the battery (including the DC power regulator) is turned on In order to generate electromagnetic waves near to zero level, it is attached to a heating element, and a predetermined resistance value is set to a temperature sensor corresponding to the on / off setting temperature on a one to one basis, and the heating element and power on / Generating electromagnetic waves generated at a substantially zero level so that they can be maintained for at least 30 seconds for a predetermined time even when the voltage is changed .

Description

TECHNICAL FIELD [0001] The present invention relates to a method for preventing generation of electromagnetic waves in a heating element using a DC power supply, and a heat generating product using the same. BACKGROUND ART [0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a method for preventing generation of electromagnetic waves in heat generating elements using a DC power source (battery) and a heat generating product using the same,

Since the temperature is controlled by the ratio of the on and off times of the power source, there is a disadvantage in that the generation of electromagnetic waves is very frequent since the power on / off period is very short, so that the DC power on-

For this purpose, the on / off temperature of the temperature control device is set differently for each temperature setting step, and on / off of the upper limit temperature (off temperature, see below) and the lower limit temperature (on temperature, And more particularly, to a method for preventing generation of electromagnetic waves in a heating element using a DC power source (battery) that generates electromagnetic waves below a reference level by making the period longer than before, and a heating product using the same.

Currently, heat generators (for example, heating vests, heat-generating mats, etc.) which generate heat by using direct current (especially battery power) are being put on the market. This allows users to wear the existing outerwear to maintain a temperature of about 34 degrees Celsius or more at a temperature of about 3 to 4 hours depending on the capacity of the battery (about 3 V to 24 V) so that they can withstand cold weather, It is used as a product.

Such conventional heat-generating products usually include a built-in heating pad member (for example, a structure in which carbon fibers or electric wires are connected to generate a direct current or an AC power through a battery to generate heat) Battery power is used as a power source, and a large-area heating element such as a mat uses a direct current switching device (adapter) and a temperature control device.

On the other hand, a direct current (battery) power source usually does not generate electromagnetic waves, but it is a heating pad made up of a heating wire (or a wire that supplies a power source) (In the case of a wire having a certain diameter in the form of a wire other than carbon fiber yarn, it is not cut off but it causes an overheating phenomenon). In addition, it can damage the body (particularly, low temperature image) The need to regulate the temperature of the heating product (or heating element) by adjusting the output of the battery has been raised. Therefore, as a typical conventional method, a PWM (Pulse Width Modulation) control method in which the temperature ratio is adjusted by adjusting the duty ratio of the power on / off time is commonly used.

However, when the PWM method is used, the on / off cycle of generating the electromagnetic wave is very short in characteristics, and therefore, there are disadvantages that many electromagnetic waves are generated per unit time, so that the electromagnetic wave per unit time of measurement occurs more frequently than the EMF certification reference value.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a DC power source for reducing the generation of electromagnetic waves by increasing the on-off period of the battery compared to the conventional PWM method. A method of minimizing the generation of electromagnetic waves in a heating element used, and a heat generating product using the method.

It is still another object of the present invention to provide a method for preventing generation of electromagnetic waves in a heat generating product using a battery that prevents the generation of electromagnetic waves by setting the on-off temperature of the temperature controlling device to different levels, and a heat generating product using the same.

According to a preferred embodiment of the present invention,
A method of preventing generation of electromagnetic waves in a heating element using a DC power source including a heating element, a temperature sensor, a temperature control device (artificial intelligent IC), an ON / OFF switching function (FET IC), and a battery, When the temperature reaches a predetermined off temperature, the power supply is turned off. When the temperature of the heating element is lowered to a predetermined temperature, the battery (including the DC power regulator) is controlled to turn on the power by transmitting a battery- Wherein a resistance value is set for a temperature sensor corresponding to an on / off set temperature of the FET IC sensed by a temperature sensor attached to a heating element to prevent generation of electromagnetic waves. In the method,
The heating element and the power on / off period can be maintained for at least 30 seconds even in the change of the heating area and the using voltage, thereby preventing generation of electromagnetic waves,

It is operated at the off and on temperature of each step set in the battery or controller (for DC power supply), and it is turned on or off at the upper limit temperature and the lower limit temperature by the predetermined step after at least 30 seconds in order to prevent the low temperature burn. The method for preventing generation of electromagnetic waves in a heating element using a DC power supply is provided.

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As described above, according to the method for preventing generation of electromagnetic waves in a heating element using a DC power source (battery) according to the present invention and a heat generating product using the same, the on- There is an effect of minimizing the generation of electromagnetic waves per hour.

Further, according to the present invention, the on-off temperature of the temperature control device is set differently for each step, thereby minimizing the generation of electromagnetic waves.

FIGS. 1 to 4 are exemplary views illustrating a wire connection state of a heating product according to an exemplary embodiment of the present invention. Referring to FIG.
Figs. 5-11 are illustrative drawings of an actual applied heat product (also referred to as a heating element, not shown) according to the example of Fig.
12 to 21 are views showing a state (battery not shown) in which a power supply line (power supply line) is connected in parallel and woven with a carbon map yarn as another embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a method for minimizing the generation of electromagnetic waves in heat generating elements using a DC power source (battery) according to a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

Referring to FIGS. 1 to 4, a method of preventing (or minimizing) generation of electromagnetic waves in heat generating products will be described. Reference numerals 2-1, 2-2, 2-3, and 2-4 denote conductors for power supply (hereinafter, actual pad (waterproof pad or pad with a nonwoven fabric or silicon pad 10- 1 to 10-7) are adhered are the same as the conductors 12-1 to 12-7).

A method of controlling a temperature using a temperature sensor, the method comprising: setting an on / off temperature of each step of a heating element so that an on / off period is at least 30 seconds; inputting a resistance value of the temperature sensor corresponding to the temperature to the IC; When the resistance of the heating element reaches the resistance value corresponding to the upper limit temperature by turning off the upper limit temperature (OFF) and the lower limit temperature (ON) by the step, it is turned off. When the resistance value corresponding to the lower limit temperature is turned on, And a temperature sensor.

Since the electromagnetic wave is generated in one cycle of the on-off-on period,

The longer the time, the smaller the amount of generated electromagnetic waves. In order to be suitable for EMF authentication, at least this period should be 30 seconds or longer, and the longer the period is, the smaller the amount of generated electromagnetic waves per unit time.

For example, Table 1 describes this.

Temperature state Battery voltage Upper limit (OFF) (℃) Lower limit (ON) (℃) ON-OFF-ON cycle High temperature 12V 44 42 30 seconds or more Used on 12V 41 39 30 seconds or more medium 12V 38 36 30 seconds or more Low temperature 12V 35 33 30 seconds or more

In order to apply the above method, the temperature controller (inputting the ON / OFF temperature of each step and the resistance value of the temperature sensor corresponding to each set temperature set in the program of the CPU incorporated in the temperature regulator for battery or DC power source) It is important to weave or manufacture an optimized heating element so that the temperature reaching on-off-on period is at least 30 seconds or longer.

The EMF certification test was conducted by KTC (Korea Electrotechnology & Testing Institute) with two batteries (heating vest and knee blanket) that meets the above conditions. As a result, 4 levels or less, and proved that the above temperature control method is useful.

EMF certification is a test to investigate whether the amount of electromagnetic waves generated when an object is powered on can reach a level (0.2 mG) that does not affect the human body directly.

For example, when the heating area is 15 cm 2, the heating can be performed at a temperature of 34 ° C. to 70 ° C. at a voltage of 3.7 V, and the heating temperature is 34 ° C. to 50 ° C. at which the heating can be applied to a heating product The amount of electric power required to emit much less electromagnetic wave than the EMF certification standard is 0.43W to 0.53W. The resistance value of the heating element should be 26? To 32 ?. There are two methods of weaving or manufacturing the heating element while maintaining the resistance of the heating area. The heating method is a series method in which the heating line is arranged at a constant interval in the heating area (the resistance value varies depending on the length) And the like.

In order to generate the same temperature under the same conditions, the resistance value decreases at the same rate according to the exothermic area increasing ratio.

The area of the heating element can be combined as a result of the width x length. However, considering the current technology level and considering the heating temperature of the heating element, it is reasonable to set the heating wire interval from 0.3 cm to 3 cm max. 0.3 cm and 3 cm were satisfied.) The height of the heating area was fixed to 3 cm in length and the transverse value was increased only by arbitrarily setting the length to 3 cm. However, when operating with a 24V power source, the heat gap is 0.3cm, high heat is generated, and the heat is required and the work is complicated.

The length of the heating line refers to the length between the shortest (3 cm in length) and the longest (0.3 cm in length) that can fit into the area of the heating element (3 cm in length x Ncm in width) and will be described with reference to Fig.

In FIG. 1, the heating area is 15 cm 2 (3 cm x 5 cm) and the heating wire length is the shortest (heating wire gap: 3 cm) 2 + 3 + (2 x 5) = 15.

On the other hand, according to FIG. 2, the heating area is 30 cm 2 (3 cm x 10 cm) and the heating wire length is the shortest (heating wire gap: 3 cm) 2 + 3 + (2 x 10) = 25.

3, the heating area is 15 cm 2 (3 cm x 5 cm) and the heating wire length is the longest (heating wire gap: 0.3 cm) (0.3 x 8) +3 + (5 + 4 + 1) + (4 x 8) = 47.4 .

4, the heating area is 30 cm 2 (3 cm x 10 cm) and the heating wire length is the longest (heating wire gap: 0.3 cm) (0.3 x 8) +3 + (10 x 2) + (9 x 8) = 97.4.

Based on the results shown above,

Shortest length: (length -1 cm) + length + (width x 2)

Maximum length: (0.3 x 8) + length + (width x 2) + (width -1 cm) x 8

to be.

The ratio of the heating area resistance that can satisfy the heating area and the heating temperature and the heating wire standard (Ω / 1m) that can meet the length of the heating line to the heating area will be examined.

Heating area Resistance value: Heating line length = 100cm Heat resistance value: 100cm

Therefore, 100 cm hot wire resistance value = heat generating area resistance value * 100 / heating wire length

to be.

The standard of the heating line to be used is based on that it can be produced or purchased based on Ω / 1m.

A heating element designed to operate with a 3.7V supply can also be operated with a 5V or 7.4V supply, where the reference is based on power consumption (W).

Referring to FIGS. 5-11, different types and shapes of heating elements are shown. All the wires are installed at regular intervals, and a temperature sensor and a battery connection jack are provided. The battery connection jack is connected to a battery control device for applying DC power.

Tables 2 to 9 show examples in which electric wires of constant diameter, which are series connection, are used as heating elements.

Table 2 shows the maximum heat of 3.7V. Table items include temperature, voltage, current, heating area, heating area increase, heating element length (arbitrary criterion), heating area resistance, heating wire spacing, heating wire length, and heating wire specification. In the following table, the same items are displayed differently.

In Table 3, the minimum heat generation is 3.7V.

In Table 4, it shows 7.4V.

Table 5 also shows 7.4 V.

Table 6 shows 11.1V.

Table 7 also shows 11.1V.

In Table 8, 22.2 V is shown.

Table 9 also shows 22.2V.

On the other hand, the length of the heating element varies depending on the length and the length. However, when the heating wire (wire) is the same in the same area, the length of the heating wire inserted is the same.

A heat plate (heating element) designed to operate with a 3.7V power supply can be operated at 5V or 7.4V, but the criterion can be used within a range not exceeding twice the maximum value of the appropriate power consumption (W) range If it exceeds this range, the heat of heating (heating element) may be heated due to the difficulty of temperature control, and heat and hot plate may be ignited. Also, the temperature ON / OFF period is shortened and the amount of generated electromagnetic waves also increases.

Conversely, a heating element designed for a 7.4V power supply can be used as a 5V power supply in some cases. In this case, it should not fall below 0.5 times the minimum value of the optimum power consumption (W). If it exceeds this range, .

Figs. 12 to 21 show examples in which carbon fibers connected in parallel as heating elements are used. 21 denotes a general room, 22 denotes carbon yarns arranged alternately in parallel with the general room (generating heat through electricity to generate heating elements), 32 denotes an electric generator Respectively.

The contents of interlocking with the temperature control device on / off cycle will be described with reference to Tables 12 to 19.

At the carbon gap

Carbon fiber 50kΩ / 1m

Carbon heating area 15cm ²

When the heating area resistance is 28 Ω,

The width of 1.5 cm is 750? (100: 50000 = 1.5: x)

The number of carbons is 750 Ω / 28 Ω = 26.7 (27)

Carbon fiber spacing is 10cm / 27 = 0.37cm

In the case of minimum heat generation,

The width of 2 cm is 1000? (100: 50000 = 2: x)

The number of carbons is 1000Ω / 28Ω = 35.7 (36)

Carbon fiber spacing is 7.5cm / 36 pieces = 0.21cm

At the carbon yarn spacing,

Carbon fiber 40kΩ / 1m

Carbon heating area 15cm ²

When the heating area resistance is 28 Ω,

The width of 1.5 cm is 600? (100: 40000 = 1.5: x)

The number of carbons is 600Ω / 28Ω = 21.4 pieces (21 pieces)

Carbon fiber spacing is 10cm / 21 pieces = 0.48cm

In the case of minimum heat generation,

The width of 2cm is 800? (100: 40000 = 2: x)

The number of carbons is 800 Ω / 28 Ω = 28.6 (29)

Carbon fiber gap is 7.5cm / 29 pieces = 0.26cm

At the carbon gap

Carbon fiber 50kΩ / 1m

Carbon heating area 30cm ²

When the heating area resistance is 28 Ω,

The width of 3 cm is 1500? (100: 50000 = 3: x)

The number of carbons is 1500Ω / 55.9Ω = 26.8 (27)

Carbon fiber spacing is 10cm / 27 = 0.37cm

In the case of minimum heat generation,

200cm (400: 40000 = 4: x)

The number of carbon atoms is 2000Ω / 55.9Ω = 35.7 (36)

Carbon fiber spacing is 7.5cm / 36 pieces = 0.21cm

At the carbon yarn spacing,

Carbon fiber 40kΩ / 1m

Carbon heating area 30cm ²

When the heating area resistance is 28 Ω,

A width of 3 cm is 1200? (100: 40000 = 3: x)

The number of carbons is 1200 Ω / 55.9 Ω = 21.4 (with 21)

Carbon fiber spacing is 10cm / 21 pieces = 0.48cm

In the case of minimum heat generation,

The width of 4cm is 1600? (100: 40000 = 4: x)

The number of carbons is 1600? / 55.9? = 28.6 (29)

Carbon fiber gap is 7.5cm / 29 pieces = 0.26cm

The operation of the heat generating product used in the present invention will be described.

The heating product used in the present invention is a heating product for a DC power supply including a heating element, a temperature sensor, a temperature control device (artificial intelligence IC), an ON / OFF switch function (FET IC) The temperature of the heating element is raised. At this time, when the predetermined off temperature (AI IC input) is reached, the AI turns off the power supply by sending an OFF signal from the AI to the FET IC. As a result, (Including DC power regulator) designed to turn the power supply on by sending a signal to the FET IC when the temperature of the IC is lowered to a predetermined on-state temperature (artificial intelligence IC), the electromagnetic wave is brought close to zero In order to generate heat, the temperature sensor attached to the heating element senses the temperature, and the resistance value of the temperature sensor corresponding to the on / off setting temperature (artificial intelligence IC) is determined one by one. the ff period can be maintained for at least a predetermined time (at least 30 seconds) even when the heating area and the working voltage are changed, and the weaving or manufacturing method of the heating body (in the above Tables 1 to 20, The numerical value is exemplarily set through the connection wire) is a temperature control method that generates electromagnetic waves at almost zero level when the heating element generates heat.

In the present invention, the on / off setting temperature of the DC power source driven by the temperature sensor attached to the heating element is changed according to the temperature adjusting step set for the battery or the regulator (DC power source) And a lower limit temperature (a temperature at which the power supply is turned on) are set.

This makes it possible to prevent or minimize the generation of electromagnetic waves (almost zero level) in a heating product using a regulator (DC power supply).

Based on the on / off setting temperature and the resistance value corresponding to each step inputted to the temperature control device (artificial intelligent IC), the power on / off cycle of each step exceeds the predetermined time (at least 30 seconds) And is set to a zero level.

It is operated at the off temperature and the on temperature for each stage set in the battery or the regulator (for DC power source), and after a certain time (depending on the site of use and skin close contact) It is repeatedly turned on / off at an upper limit temperature and a lower limit temperature.

Further, it is characterized in that the heating area of the heating element and the corresponding heating line length are determined differently according to the operating voltage.

In this case, the on / off cycle of the heating element is not changed, so that the generation of electromagnetic waves occurs at almost zero level. do.

Ex.) When using 3.7v for 7.4v, connect the wire with 1.5cm x 2 (1.5cm x 2).

In case of using 3.7v for 11.1v, increase the wire spacing (1.5cm x 3) to 1.5cm x 3.

The present invention has been described on the assumption that battery capacities of 3.7V, 7.4V, 11.1V, and 22.4V are used.

2-1, 2-2, 2-3, 2-4: conductors
10-1, 10-2, 10-3, 10-4, 10-5, 10-6, 10-7: pad
12-1, 12-2, 12-3, 12-4, 12-5, 12-6, 12-7:
21: General room
22: carbon fiber
32: Electric supply line

Claims (10)

A method for preventing generation of electromagnetic waves in a heating element using a DC power source including a heating element, a temperature sensor, a temperature control device (artificial intelligent IC), an ON / OFF switch function (FET IC), and a battery, The control unit controls the battery (including the direct current power supply) to turn on the power supply by sending a battery on signal when the temperature of the heating element is lowered to a predetermined temperature, And a resistance value is set to a temperature sensor corresponding to an on / off set temperature of the FET IC sensed by a temperature sensor attached to a heating element to prevent the occurrence of electromagnetic waves in the heating element. In this case,
The heating element and the power on / off period can be maintained for at least 30 seconds even in the change of the heating area and the using voltage, thereby preventing generation of electromagnetic waves,
It is operated at the off and on temperature of each step set in the battery or controller (for DC power supply), and it is turned on or off at the upper limit temperature and the lower limit temperature by the predetermined step after at least 30 seconds in order to prevent the low temperature burn. And repeating the step of repeating the step of repeating the step of repeating the step of repeating the step of repeating the step of repeating. The method according to claim 1,
The on / off setting temperature of the DC power source driven using the temperature sensor attached to the heating element varies depending on the temperature adjusting step set in the battery or the controller. In each step, the upper limit temperature (the power is turned off) and the lower limit temperature a temperature at which the electromagnetic wave is turned on is set.
The method according to claim 1,
A temperature sensor having a resistance value corresponding to each temperature, an artificial intelligence IC recognizing the resistance values, and a FET IC functioning as a switch for turning on / off the power based on the resistance value. Prevention method.
The DC power supply according to claim 1, wherein the power on / off period of each step is at least 30 seconds or more based on the on / off set temperature of each step input to the temperature control device and the corresponding resistance value A method for preventing generation of electromagnetic waves in a heating element used.
delete The method according to claim 1,
Wherein a difference between a heat generating area of the heat generating element and a corresponding heat line length is different according to a use voltage of the heat generating element.
The method according to claim 1,
The heating element can be used as another voltage (upper voltage). In this case, since the on / off period of the heating element is not changed, the heating element can be used as an electromagnetic wave Wherein the electromagnetic wave generated by the heating element is prevented from being generated.
8. The method of claim 7, wherein the parallel connection conductors are spaced apart from each other.
The method according to claim 7, wherein the distance between the carbon fibers is different.
A heat generating article to which a method of preventing generation of electromagnetic waves in a heating element using a DC power source including a heating element, a temperature sensor, a temperature control device (artificial intelligence IC), an ON / OFF switch function (FET IC) The power supply is turned off when the temperature of the heating element reaches the preset off temperature and the battery is turned on when the temperature of the heating element is lowered to the predetermined temperature, A temperature sensor corresponding to the on / off set temperature of the FET IC sensed by a temperature sensor attached to the heating element to control generation of electromagnetic waves, / off cycle can be maintained for at least 30 seconds even in the change of the heating area and the operating voltage to prevent the generation of electromagnetic waves, and the battery or the regulator Off temperature and a lower temperature for each step set for each of the stages, and then the on / off operation is repeated at an upper limit temperature and a lower limit temperature by a predetermined step after at least 30 seconds in order to prevent a low temperature image. Fever products.

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