KR200346553Y1 - Surface type heater with low magnetic field - Google Patents

Abstract

First and second conductive terminals are formed at both ends, and the plurality of planar heating blocks in which the conductive terminals are electrically connected by carbon fibers are independently partitioned, and the first conductive terminals of the planar heating blocks adjacent to each other among the planar heating blocks are independently partitioned. The low magnetic field heating element in which powers of different polarities are alternately applied to the and second conductive terminals are disclosed.

Description

Hypo-type planar heating element {Surface type heater with low magnetic field}

The present invention relates to a hypothermic planar heating element, and more specifically, the planar heating element is divided into a plurality of planar heating blocks, and the conductive wires are alternately applied to the conductive terminals located on the same side of each heating block by alternately applying power of different polarities. And it relates to a low-profile plane heating element that canceled the magnetic field generated from each conductive terminal.

In general, a heating element is widely used for the purpose of requiring heat. In particular, a lot of planar heating elements using carbon fibers are widely used.

However, in such a planar heating element, a magnetic field inevitably generated by applying power is a big problem.

Various methods have been proposed in an attempt to reduce the magnetic field generated in the planar heating element. Essentially, two planar heating elements of the same size and capacity must be superimposed to offset the magnetic fields from each other at the same power inlet.

That is, in the planar heating element, carbon fibers are connected in parallel, so the magnetic field difference between the power supply inlet and the terminal increases in multiples at the end. Therefore, in order to cancel the magnetic field, the overlapping planar heating elements are generally applied so that opposite polarities of the same size are applied. Was used. As an example, a similar structure is shown in Korean Utility Model Registration No. 285,958.

However, in the case of applying a structure that simply overlaps the planar heating element in this way, heat is generated from the heating wires arranged up and down, and the insulating layer surrounding the heating wire and the heating wire is not completely in contact with each other. There is a danger of fire due to temperature rise.

In addition, there is a problem that the use of two surface heating elements are inefficient and increase the manufacturing cost.

Accordingly, an object of the present invention is to solve the problems of the related art, and it is possible to reduce the magnetic field by using a single sheet heating element, and to remove the risk of fire that may occur by overlapping heating lines. To provide.

Other objects and features of the present invention will be clearly understood through the preferred embodiments described below.

1 is a block diagram of a planar heating element according to an embodiment of the present invention.

2 is a graph illustrating a principle of canceling a magnetic field according to the present invention.

3 is a block diagram of a planar heating element according to another embodiment of the present invention.

4 is a block diagram of a planar heating element according to another embodiment of the present invention.

According to an aspect of the present invention, a plurality of planar heating blocks in which the first and second conductive terminals are formed at both ends and the conductive terminals are electrically connected by carbon fibers are independently partitioned, and the planar heating blocks are adjacent to each other. A low-profile plane heater is disclosed in which powers of different polarities are alternately applied to the first conductive terminals and the second conductive terminals of the heating block.

According to another aspect of the present invention, a plurality of first planar heating blocks having first and second conductive terminals connected to both ends integrally, respectively, and the first and second conductive terminals are electrically connected by carbon fibers; Located between the first planar heating blocks, and comprises a plurality of second planar heating blocks are formed at both ends of the third and fourth conductive terminals and the third and fourth conductive terminals are electrically connected by carbon fiber, The first and third conductive terminals and the second and fourth conductive terminals are adjacent to each other and electrically insulated from each other, and a low-profile plane heating element to which power of different polarities is applied is disclosed.

Preferably, the conductive line for applying power to the first to fourth conductive terminals is connected to the intermediate position of the conductive terminal, and the third and fourth conductive terminals are formed separately from the first and second conductive terminals, respectively.

According to another aspect of the present invention, the first and second conductive terminals which are integrally connected to both ends are formed, and the plurality of planar heating blocks in which the conductive terminals are electrically connected by carbon fiber are formed spaced apart at regular intervals. One-sided heating element; Third and fourth conductive terminals are integrally connected to both ends, respectively, and a plurality of planar heating blocks in which the conductive terminals are electrically connected by carbon fibers include a second planar heating element spaced apart from each other at the same interval as the interval. The first planar heating element and the second planar heating element are overlapped such that each planar heating block is spaced apart from each other, and the first and second conductive terminals are spaced apart from the third and fourth conductive terminals, respectively. The third conductive terminal, the second conductive terminal, and the fourth conductive terminal are disclosed.

Hereinafter, with reference to the accompanying drawings will be described an embodiment of the present invention. The following embodiments will be omitted mainly for the convenience of description, the detailed structure of the planar heating element is mainly described with respect to the conductive terminal and the carbon fiber.

1 is a block diagram of a planar heating element according to an embodiment of the present invention.

As shown, the planar heating blocks 110, 120, 130, and 140 on the planar heating element 100 are independently partitioned at a rate of allocating 10 carbon fibers to, for example, one conductive terminal. First conductive terminals 112 and 122 and second conductive terminals 114 and 124 are formed at both ends of the planar heating blocks, and the first and second conductive terminals are electrically connected by the carbon fibers 115 and 125.

According to this embodiment, among the planar heating blocks 110, 120, 130, 140, the first conductive terminals 112, 122 and the first conductive terminals 112 of the planar heating blocks adjacent to each other, for example, the heating blocks 110, 120, are formed. Power supplies of different polarities are applied to the two conductive terminals 114 and 124.

More specifically, + power is applied to the first conductive terminal 112 of the planar heating block 110, and-power is applied to the first conductive terminal 122 of the planar heating block 120. In this way, + power supply and-power supply are alternately applied to the first conductive terminal of each of the adjacent planar heating blocks.

Similarly, − power is applied to the second conductive terminal 114 of the planar heating block 110, and + power is applied to the second conductive terminal 124 of the planar heating block 120, so that each of the planar heating elements adjacent to each other is generally provided. The + power supply and the-power supply are alternately applied to the second conductive terminal of the block.

2 is a graph illustrating a principle of canceling a magnetic field according to the present invention.

As shown in FIG. 2A, four heating blocks ①, ②, ③, and ④ are divided into 10 carbon fibers to each of the conductive terminals of each heating block, and a magnetic field of 0.1 mG is generated to each carbon fiber. It is assumed that the conductors A and B are connected to the intermediate positions of the respective conductive terminals so that the maximum magnetic field applied to them does not exceed 0.5 mG.

2b and 2c show the strengths of the magnetic fields of the conductive lines A and B, respectively. That is, + power is applied to the conductive wire A, and a magnetic field of 1 mG is applied from the middle of the conductive terminal of the heating block ③, and a magnetic field of 1 mG is added from the middle of the conductive terminal of the heating block ①, and a magnetic field of 2 mG is applied. Similarly,-power is applied to the conductive line B, and a magnetic field of 1 mG is applied from the middle of the conductive terminal of the heating block ④, and a magnetic field of 2 mG is added by adding a magnetic field of 1 mG from the middle of the conductive terminal of the heating block ②.

FIG. 2D shows a magnetic field in which the magnetic fields applied to the conductive lines A and B are offset, and a discrete magnetic field having a maximum value of 1 mG appears.

Figure 2e shows the distribution of the magnetic field applied to the conductive terminal of each heating block, the magnetic field is reduced toward both ends around the intermediate position where the conductive line is connected. The maximum value of the magnetic field at the intermediate position of the conductive terminal is 0.5mG.

In this way, the magnetic field generated at the conductive terminal and the magnetic fields applied to the conductive lines A and B cancel each other, and finally, only the magnetic field corresponding to the −power source remains in the form shown in FIG. 2F, and the maximum value is 1 mG.

Therefore, when the magnetic field generated in each carbon fiber is designed to be 0.1 mG, the maximum value of the magnetic field generated from the heating element according to the first design is 1 mG.

As a result, due to the high resistance of the carbon fiber, the magnetic field per one is low and the magnetic field applied to the conductive line is canceled, and the magnetic field applied to the conductive terminal is also superimposed or canceled again with the magnetic field of the canceled conductive line.

3 is a block diagram of a planar heating element according to another embodiment of the present invention.

According to this embodiment, the planar heating element 200 is composed of the first planar heating block 210 and the second planar heating block 220 which is electrically insulated therebetween, the first and second planar heating block 210 and 220 have conductive terminals 212, 214, 222 and 224 at both ends.

Unlike the embodiment of FIG. 1, the first and second conductive terminals 212 and 214 are integrally connected to both ends of the planar heating element 200, respectively, and the conductive terminals are partitioned by partitioning the heating blocks 210 and 220. Separate. That is, the first and second conductive terminals 222 and 224 of the second planar heating block 220 are separated from the first and second conductive terminals 212 and 214 of the first planar heating block 210, respectively.

Also in this embodiment, + power is applied to the first conductive terminal 212 of the first planar heating block 210, and the first conductive terminal () of the adjacent second planar heating block 220 is applied to the first conductive terminal 212. 222 is supplied with a -power source. In addition, -power is applied to the second conductive terminal 214 of the first planar heating block 210, and + power is applied to the second conductive terminal 224 of the second planar heating block 220, thereby providing power from the terminal. The magnetic fields generated from each conductive terminal and drawn out through the conductive lines cancel each other while proceeding toward the lead portion.

According to this embodiment, the number of conductive wires drawn out from the conductive terminal can be reduced, so that the connection portion is reduced, thereby improving workability and having a neat finish.

In this embodiment as well, the maximum value of the magnetic field applied to the conductive terminal can be reduced by connecting the conductive line to the intermediate position of the conductive terminal as in the above-described embodiment.

4 is a block diagram of a planar heating element according to another embodiment according to the present invention.

As illustrated, the first planar heating element 300 and the second planar heating element 300 ′ have a structure in which they overlap each other.

The first planar heating element 300 includes a plurality of planar heating blocks in which first and second conductive terminals 312 and 322 are integrally connected to both ends, respectively, and the conductive terminals are electrically connected by carbon fibers 315. 310 is formed spaced apart at regular intervals.

The second planar heating element 300 ′ includes a plurality of planar heating blocks in which third and fourth conductive terminals 314 and 324 are integrally connected to both ends, respectively, and the conductive terminals are electrically connected by carbon fibers 325. The fields 320 are spaced apart from each other at the same interval as that formed on the first surface heating element 300.

The first planar heating element 300 and the second planar heating element 300 ′ having such a structure are each planar heating block 310 and 320 disposed at a spaced distance from each other, and the first and second conductive terminals 312 and 322. ) Are spaced apart from the third and fourth conductive terminals 314 and 324, respectively.

At the same time, a -power source and a + power source are applied to the first conductive terminal 312 and a third conductive terminal 314, respectively, and a + power source and a -power source are respectively applied to the second conductive terminal 322 and the fourth conductive terminal 324. Power of different polarity is applied.

Therefore, the magnetic fields generated from each of the planar heating blocks 310 and 320 are canceled with each other because they have the same size with the same capacity.

In addition, according to this embodiment, there is no conductive line drawn out from the conductive terminal to the outside, there is an advantage that the workability is excellent because there is no connection portion.

On the other hand, in such a configuration, by winding a coil of the same capacity around each conductive line on the power inlet side, the current can be sensed, and if a difference occurs over a predetermined value, the power supply can be stopped or a warning can be made. Therefore, even if any one of each conductive line is short-circuited, the user can easily know it.

In the above described with reference to a preferred embodiment of the present invention, various changes or modifications can be made within the scope without departing from the spirit of the present invention. Therefore, the scope of the present invention should not be limited to the above embodiment, but should be determined by the utility model registration claims described below.

As described above, according to the present invention, the generation of the magnetic field can be reduced by using only one surface heating element, thereby reducing the manufacturing cost. In particular, by connecting a conductive line to an intermediate position of the conductive terminal, there is an advantage that the maximum value of the magnetic field applied to each conductive terminal can be reduced.

In addition, there is an advantage that it is possible to prevent the risk of fire due to partial overheating that may occur by overlapping the heating line double.

In addition, there is an advantage that the productivity is increased due to excellent workability by reducing or completely removing the connection portion with the conductive terminal.

Claims (5)

First and second conductive terminals are formed at both ends, and the plurality of planar heating blocks in which the conductive terminals are electrically connected by carbon fibers are independently partitioned, and among the planar heating blocks, the first conduction of the planar heating blocks adjacent to each other. A low-profile plane heating element, characterized in that power is applied alternately to the terminals and the second conductive terminals, respectively. The low-profile plane heater of claim 1, wherein a conductive line for supplying power to the first to fourth conductive terminals is connected to an intermediate position of the conductive terminal. A plurality of first planar heating blocks having first and second conductive terminals respectively connected to both ends and integrally connected to each other by carbon fibers; Located between the first planar heating blocks, a third and fourth conductive terminals are formed at both ends, and the third and fourth conductive terminals include a plurality of second planar heating blocks electrically connected by carbon fiber. , The first and third conductive terminals and the second and fourth conductive terminals are adjacent to each other and are electrically insulated from each other, and a low power plane heater of claim 9, wherein power of different polarities is applied. The low-profile plane heating element of claim 3, wherein the third and fourth conductive terminals are formed separately from the first and second conductive terminals, respectively. First and second planar heating elements each having first and second conductive terminals integrally connected to both ends, and having a plurality of planar heating blocks in which the conductive terminals are electrically connected by carbon fibers, spaced at regular intervals; Third and fourth conductive terminals each integrally connected to both ends are formed, and the plurality of planar heating blocks, in which the conductive terminals are electrically connected by carbon fiber, includes a second planar heating element spaced apart from each other at the same interval. , The first planar heating element and the second planar heating element are overlapped so that each planar heating block is spaced apart from each other, and the first and second conductive terminals are spaced apart from the third and fourth conductive terminals, respectively. The first conductive terminal, the third conductive terminal, and the second conductive terminal and the fourth conductive terminal, each of the low-level plane heating element, characterized in that the power of different polarity is applied.