KR100348874B1 - A electric heat device with an ability for electromagnetic wave diminish - Google Patents

Abstract

The present invention relates to a heating device having a portion in direct contact with the human body, such as an electric mat, an electric sheet, an electric blanket having a heat generating portion that generates heat by the supply of power.

In the existing ones, a lot of electromagnetic waves are generated, in particular, in the case of using a heating device that is in direct contact with the human body, the user may be seriously injured by electromagnetic waves, whereas the electromagnetic wave reducing heating device according to the present invention is a power source and an electromagnetic wave. Charge amount for comparing the charge amount of the electromagnetic wave absorbing unit according to the operation of the second switching unit, the second switching unit for selectively connecting the electromagnetic wave absorbing unit to any one line or both of the two wires of the power supply unit provided between the absorption unit And a control unit for controlling the operation of the first switching unit according to the temperature information of the comparing unit and the temperature sensing unit, and controlling the operation of the second switching unit according to the comparison result in the charge amount comparing unit. By automatically controlling the operation of the switching unit to discharge the charge of the electromagnetic wave absorption unit most efficiently It provides the effect of minimizing the electromagnetic damage of electric heater users.

Description

A electric heat device with an ability for electromagnetic wave diminish}

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to an electromagnetic wave reducing electric heating device, and more particularly, to an electric heating device having a portion in direct contact with a human body, such as an electric mat, an electric sheet, and an electric blanket having a heat generating unit that generates heat by supply of power.

In general, electric heaters such as electric blankets, mats, and blankets are used to supply heat to the user's body in cold weather such as winter, so that the user can stay warm. Heating unit that generates heat, an operation unit that allows the user to turn the power on or off manually, and a temperature setting unit, a temperature sensing unit for sensing the temperature of the heating unit, and a heating line according to temperature information applied from the temperature sensing unit. It consists of a control unit for opening and closing the power supplied to. Electromagnetic waves are generated in the heating wire of such a heating device, which can be seen from Table 1.

Table 1 shows the measurement of electromagnetic wave emissions of electronic products.Thesis published in the Korean Journal of Medical Engineering (Vol. 16, No. 2, 1995) entitled `` Electromagnetic Measurements for Human Exposure and Epidemiological Investigation by Various Electromagnetic Waves ''. The following is an excerpt. As can be seen from Table 1, electromagnetic waves are generated in all electronic products, and in particular, the electric field emits an average of 5.238 μT (52.38 mG), which is relatively higher than that of other products except the massager. .

In particular, the electric heating device such as an electric blanket is a problem that not only emits a lot more electromagnetic waves than other electric heating devices, but also the electric blanket and the like in direct contact with the human body in use. In other words, electromagnetic waves are seriously damaged in electric heating devices such as electric field plates. Of course, the electromagnetic waves are generated in other electronic products, which may damage the user's health when used for a long time. Electromagnetic waves generated from such heating equipment should be suppressed as much as possible.

As a related technology, there is an invention disclosed in Patent No. 120022 (published on October 23, 1997) (hereinafter, referred to as “sailor invention”). Said invention has a ground line detecting means for detecting the presence or absence of a grounded power line and a grounded power line among the power lines supplied to the customer, and for connecting the ground lines inside the electric and electronic devices to the detected ground power lines. A control means for determining a ground power supply line by receiving the switching means and the detection signal of the ground line detection means, and in response to the determination result, the switching means for connecting the grounding line inside the apparatus to the detected ground power supply line, the ground line detection means As a result of the detection of grounding power line by the controller, it consists of a zero-voltage detecting means for making a zero voltage of the input power supply line to ground the grounding line inside the equipment by the switching operation of the switching means when there is no grounded power supply line. This can be seen in detail in the patent publication of the seaman invention. It is recognized that the source invention absorbed electromagnetic waves generated from the heat generation part to lower the amount of electromagnetic waves generated to a certain extent compared to the previous heating equipment, but the degree of harmful wave blocking was insufficient, and to find a target for connecting to the harmful wave blocking network. The ground line detecting means using a neon lamp and the zero point voltage detecting part using a resistor and a condenser are separately required, and electromagnetic waves caused by the fundamental electric and magnetic fields generated by the heating wire itself cannot be reduced.

It is an object of the present invention to automatically absorb electromagnetic waves generated in a heating device having a heat generating unit that generates heat when power is supplied, and then automatically discharge the electromagnetic waves through a selected power line to generate electromagnetic waves by electric and magnetic fields of the heating wire. It is to provide an electromagnetic wave reduction heating device that can reduce the electromagnetic damage to the user by heating.

1 is a block diagram showing an electromagnetic wave reduction heating apparatus according to the present invention,

2 is a circuit diagram of an electromagnetic wave reducing heating apparatus according to the present invention;

3 is a cross-sectional view illustrating an arrangement state of an electromagnetic wave absorbing unit in the electromagnetic wave reducing heating apparatus according to the present invention;

4 is a cross-sectional view illustrating a structure of a heating line of FIG. 3.

5 is a perspective view showing the internal structure of the heating wire of Figure 4,

6 is a view for explaining the operation of the charge comparison unit of the heat transfer apparatus according to the present invention.

Explanation of symbols on the main parts of the drawings

100: electromagnetic wave reduction heating device 110: power supply

120: heating portion 122: heating line

130: temperature sensing unit 140: first switching unit

150: operation unit 160: electromagnetic wave absorption unit

170: second switching unit 180: charge amount comparison unit

190: control unit 200: minimum electromagnetic wave detection display unit

210: temperature display portion PT1 to PT6: photo coupler

b1-b3: button

An object of the present invention is a power supply unit for power supply and a heat generating unit that generates heat when the power is supplied from the power supply unit, a temperature sensing unit for detecting the temperature of the heat generating unit, the first switching unit for opening and closing the power supplied to the heating unit and the user operation In the electric heating device having an operation unit for the power supply, the second switching unit, the second switching unit is installed between the power supply unit and the electromagnetic wave absorption unit for selectively connecting the electromagnetic wave absorption unit to any one line or both of the two wires of the power supply unit And a control unit for controlling the operation of the first switching unit according to the charge amount comparing unit and the temperature sensing unit temperature information for comparing the charge amount of the electromagnetic wave absorbing unit according to the operation of the operation, and the operation of the second switching unit according to the comparison result from the charge comparison unit. It is possible to achieve the electromagnetic wave reduction heating device characterized in that.

The second switching unit is composed of a solid state switching unit having three photo couplers to connect the electromagnetic wave absorption unit by selecting any one of the "+" line, "-" line, "+ line and-line mixed" of the power supply unit It is desirable to.

The heating wires of the heating part may include a first heating layer wound around the first insulating layer, a first insulating layer wrapped around the first insulating layer, a second insulating layer surrounding the first heating wire, and a second heating wire wound around the second insulating layer and the second heating wire. It is preferable to comprise the 3rd insulating layer which encloses.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram showing an electromagnetic wave reducing heating apparatus according to the present invention, Figure 2 is a circuit diagram of the electromagnetic wave reducing heating apparatus according to the present invention.

As shown in FIG. 1 and FIG. 2, the electric heating device 100 according to the present invention includes a power supply unit 110 for supplying power and a heat generation unit 120 that generates heat when power is supplied from the power supply unit 110. . The heat generating unit 120 is configured by arranging a heating line along a predetermined path, and the heating line 122 used here will be described in more detail later with reference to FIG. 5.

In addition, the electromagnetic wave reduction heating device 100 according to the present invention is a temperature sensing unit 130 for sensing the temperature of the heat generating unit 120 and the first switching unit for opening and closing the power supplied to the heat generating unit 120. 140 and the operation unit 150 to enable the user to set the temperature and to turn on or off the power switch manually. In the above description, the temperature sensing unit 130, the operation unit 150, the first switching unit 140, the power supply unit 110, etc. except for the heating unit 120 may be used as it is.

In addition, the electromagnetic wave reduction heating apparatus 100 according to the present invention includes an electromagnetic wave absorbing unit 160. The electromagnetic wave absorbing unit 160 is installed above the heat generating unit 120 to absorb and store electromagnetic waves generated from the heat generating unit 120. The electromagnetic wave absorbing unit 160 is preferably formed of an aluminum thin plate. Of course, the electromagnetic wave absorbing unit 160 may be made of other conductors such as copper as well as aluminum.

In addition, the electromagnetic wave reduction heating apparatus 100 according to the present invention is installed between the power supply unit 110 and the electromagnetic wave absorbing unit 160 and the electromagnetic wave absorbing unit 160 and any one of two lines of the power supply unit 110 and A second switching unit 170 is provided to selectively connect or connect both wires, and to switch off the electric power normally applied to the heat generating unit 120 to reduce the generation of electromagnetic waves. The switching unit 170 is for discharging the charges collected in the electromagnetic wave absorbing unit 160 to a selected line. The second switching unit 170 transmits the electromagnetic wave absorbing unit 160 to a "+" line of the power supply unit, It consists of a solid-state switching unit using three photocouplers (PT1, PT2, PT3) that allow you to select any of the “-” wires, “++ and –wire mixed”. The electromagnetic wave absorbing unit 160 is a part of the present invention, which will be described later.

In addition, the electromagnetic wave reduction heating apparatus 100 according to the present invention includes a charge comparison unit 180. The charge comparison unit 180 is the electromagnetic wave absorbing unit 160 in each case by the switching operation of the second switching unit 170, that is, "+" line, "-" line, "+ line and-line mixed" This is to compare the amount of charge that enters the) side and is stored. This is also a part of the present invention, which will be described in detail with reference to FIG. 6.

In addition, the electromagnetic wave reduction heating apparatus 100 according to the present invention includes a control unit 190. The controller 190 not only controls the operation of other basic components, but also controls the operation of the first switching unit 140 according to the temperature information of the temperature sensing unit 130 and at the same time the charge amount comparing unit 180. In accordance with the comparison result serves to control the operation of the second switching unit 170. In addition, the control unit 190 is connected to the lowest electromagnetic wave detection display unit 200 and the temperature display unit 210, respectively. The lowest electromagnetic wave detection display unit 200 is used to indicate which line is generated in the electromagnetic wave absorbing unit 160 when the line is connected to the second switching unit 170 by an LED or the like. It just displays the status so that the user knows. The temperature display unit 210 is a part for displaying the current temperature and the set temperature so that the user can know.

The present invention of the above configuration, first, turn on the power button (b1) in the operation unit 150, and then set the temperature using the up button (up button, b2), down button (Down button, b3). According to the temperature setting, the controller 190 operates the first switching unit 140 to supply power to the heat generating unit 120 including the heating line 122 (see FIG. 5) from the power supply unit 110. Heat is generated in the heat generating unit 120 to which power is supplied to increase the temperature of the heat generating unit 120. In this way, when the temperature of the heat generating unit 120 rises to the set temperature, the temperature detecting unit 130 detects this and applies temperature information to the control unit 190, and the control unit 190 again switches the first switching unit 140. By operating the power supply to the heat generating unit 120 is cut off. Of course, when the temperature of the heat generating unit 120 is lowered below the set temperature, the controller 190 operates the first switching unit 140 again so that power is supplied to the heat generating unit 120. That is, while repeating this process, the temperature of the heat generating unit 120 maintains a temperature within a predetermined range. Since such a configuration is a general technology, a detailed description thereof will be omitted.

On the other hand, when power is supplied to the heat generating unit 120, an electric field and a magnetic field are formed around the heat generating unit 120, and electromagnetic waves are generated in proportion thereto. Electromagnetic wave induced by the magnetic field before the heating unit 120 is absorbed by the electromagnetic wave absorbing unit 160, so that a large amount of charges are collected in the electromagnetic wave absorbing unit 160, and the amount of charge in the electromagnetic wave absorbing unit 160 Since the gathered in a large amount is that a lot of harmful electromagnetic waves are applied to the user as well, it is necessary to forcibly discharge the charge collected in the electromagnetic wave absorbing unit 160. Forced discharge of the charge collected in the electromagnetic wave absorbing unit 160 is a "+" line, "-" line, "+ line and-line mixed" connected to the second switching unit 170 controlled by the controller 190 It flows through either one and disappears.

In more detail, the controller 190 determines that the amount of charges generated from the harmful electromagnetic waves collected in the electromagnetic wave absorbing unit 160 exceeds the reference value as a result of comparing with the reference value preset by the charge amount comparing unit 180. In this case, the controller 190 sequentially operates the three photocouplers PT1, PT2, PT3 of the second switching unit 170 to “+” line, “−” line, “+ line” of the power supply unit 110. And the electromagnetic wave absorbing portion 160 is connected to any one of which the amount of charge is the smallest in the " -line mixing " to forcibly discharge the electric charge collected in the electromagnetic wave absorbing portion 160. The reason why the electric charge is selected by the power line with small charge is that it can be discharged quickly because there is no resistance element. In addition, the line connected to the electromagnetic wave absorbing unit 160 by the controller 190, that is, one of the "+" line and the "-" line is the ground line, and thus the harmful electromagnetic waves collected in the electromagnetic wave absorbing unit 160 It flows through the ground wire which is connected automatically and it is extinguished. If there is no ground wire, that is, the amount of measured charge detected from the "+" line and the "-" line is the same, it flows through both sides of the "+ line and the-line" to cancel the charges and disappear. Therefore, the electric field absorbed by the electromagnetic wave absorbing unit 160 and the charge due to the electromagnetic field and the electromagnetic wave are most efficiently discharged to the selected line of the power supply unit 110, thereby reducing the damage of the electromagnetic wave to the user of the heating apparatus.

3 is a cross-sectional view for explaining an arrangement state of the electromagnetic wave absorbing unit in the electromagnetic wave reduction heating apparatus according to the present invention, FIG. 4 is a cross-sectional view showing the structure of the heating line of Figure 3, Figure 5 is a perspective view showing the internal structure of the heating line of Figure 4 to be.

As shown in FIG. 3, in the electromagnetic wave reduction heating apparatus 100 according to the present invention, a heat insulating material 129 is disposed below the heat generating part 120 formed of the heating line 122, and aluminum is disposed above the heat generating part 120. The electromagnetic wave absorbing unit 160 made of a thin plate or the like is provided with an outer surface 162 thereon. In the heating device 100, the heating wire 122, which forms a feature of the present invention, has a first wire 124 wound around the first insulation layer 123 and the first insulation layer 123 having a long line shape therein. The second insulating layer 125 surrounding the first heating wire 124, the second heating wire 126 wound along the circumference of the second insulating layer 125, and the third insulating layer surrounding the second heating wire 126. It consists of 127. Here, as shown in FIG. 5, the first and second heating wires 124 and 126 are wound like coil springs around the first insulating layer 123 and the second insulating layer 125, which is a large amount of heat per unit length. In order to be generated and wound in the same direction, so that the direction of the current flowing along the first and second heating wires 124 and 126 is the same, so that the electric field and the magnetic field generated here are canceled out. This is to suppress the generation of electromagnetic waves to the maximum possible extent.

6 is a view for explaining the operation of the charge amount comparison unit in the electromagnetic wave reducing electrothermal apparatus according to the present invention.

The operation of the charge comparison unit 180 is to obtain charge amount data on which power line to connect the electromagnetic wave absorbing unit 160 (see FIGS. 1 and 2) in which harmful electromagnetic waves are stored, to effectively discharge harmful electromagnetic waves. It is effective to emit harmful electromagnetic waves toward the side with the lowest possible charge. The reason is that there is no resistance element so it can be discharged quickly. Meanwhile, the data obtained from the charge comparison unit 180 controls the second switching unit 170 to connect the electromagnetic wave absorbing unit 160 with a line satisfying the data.

Referring to the operation of the charge comparison unit 180 as described above in more detail, first, the charge amount comparison data to connect the electromagnetic wave absorbing unit 160 to the R (+) line or T (-) line This is obtained by comparing the charge amount of the current applied to the unit 180. For example, when the charge amount on the R line is small, the amount of charge on the R line and the R line T line is compared again. It is connected to the R line side to emit harmful electromagnetic waves, and if the charge amount of both the R and T line is less, the electromagnetic wave absorbing unit 160 is connected to both lines to emit harmful electromagnetic waves.

In addition, when the amount of charge when connecting to the T line is smaller than the amount of charge connected to the R line or the T line, the amount of charge is compared with the amount of charge when connecting to both the R line and the T line. If the amount of charge on the T line side is smaller, the electromagnetic wave absorbing unit 160 is connected to the T line, otherwise the electromagnetic wave absorbing unit 160 is connected to both the R line and the T line. When the amount of charge on the side is the same, the amount of charge is connected to the one with less charge compared to both the R line, the R line, and the T line, and when the charge amount is the same on both sides, again, the charge amount of both the R line and the T line and the T line side The electromagnetic wave absorbing unit 160 is connected to the side of the electric charge absorbing unit 160 by comparing the amount of electric charges. In the above embodiment, the process of connecting the electromagnetic wave absorbing unit 160 to the R line or the T line, and the R line and the T line is understood. Although described step by step in order to help, in practice it is automatically executed quickly by the second switching unit 170 controlled by the controller 190.

As can be seen from the above description, in the case of using the electromagnetic wave reduction heating apparatus according to the present invention, the electromagnetic wave generated by the heat generating unit absorbs the electromagnetic wave absorbing unit to automatically connect the second switching unit to the line having the best charge emission efficiency. By being emitted, there is an effect that can further reduce the generation of harmful electromagnetic waves compared to the conventional, and also has the effect that the user can reduce the damage caused by electromagnetic waves by taking a structure that generates less electromagnetic waves as possible.

Claims (3)

Power supply for power supply and a heat generating unit for generating heat when the power is supplied from the power supply unit, a temperature sensing unit for sensing the temperature of the heat generating unit, a first switching unit for opening and closing the power supplied to the heat generating unit, the heating unit upward In the heat-transfer device which is disposed and provided with an electromagnetic wave absorbing portion made of a conductor for absorbing the electromagnetic wave generated in the heat generating portion and the operation portion for the user operation, A second switching unit disposed between the power supply unit and the electromagnetic wave absorbing unit to selectively connect the electromagnetic wave absorbing unit to any one line or both of the two wires of the power supply unit; A charge amount comparing unit for comparing charge amounts of the electromagnetic wave absorbing unit according to each operation of the second switching unit; And And a control unit for controlling the operation of the first switching unit according to the temperature information of the temperature sensing unit and controlling the operation of the second switching unit according to the comparison result of the charge amount comparing unit. The method of claim 1, wherein the second switching unit is connected to the three photo coupler to enable the electromagnetic wave absorbing unit to select any one of the "+" line, "-" line, "+ line and-line mixed" of the power unit; Electromagnetic wave reduction heating device characterized in that the contactless switching unit provided. The heating line of claim 1, wherein the heating line of the heat generating unit includes an internal first insulating layer, a first heating wire wound along a circumference of the first insulating layer, a second insulating layer surrounding the first heating wire, and the second heating wire. And a third insulating layer wound around the insulating layer, and a third insulating layer surrounding the second heating wire.