KR20210158643A - Joinning assembly of plate heater - Google Patents

Abstract

The present invention provides a composing assembly of a surface heating element that can increase durability of the surface heating element by stably supporting the surface heating element operating in a high temperature environment. To this end, the present invention comprises: a first coupling member disposed between a support frame and the surface heating element and having a first body part provided to cover the lower portion of a coupling hole formed in the surface heater, and supporting the surface heating element from the support frame, and a first support part formed to protrude in an upper direction from the first body part so as to pass through the coupling hole; a second coupling member disposed on the upper side of the surface heating element and having a second body part provided to cover the upper part of the coupling hole and supported on the upper surface of the first support part having passed through the coupling hole; and a fixating member fixating the first coupling member and the second coupling member to the support frame in a state in which the first coupling member and the second coupling member are in close contact therewith with the surface heating element interposed therebetween, wherein a vertical gap is arranged between the surface heating element and the second coupling member by making the thickness of the first support part greater than that of the surface heating element so as to secure a deformation space of the surface heating element due to heat generated during an operation.

Description

Assembly assembly of a planar heating element {JOINNING ASSEMBLY OF PLATE HEATER}

The present invention relates to a planar heating element assembly assembly, and more particularly, to a planar heating element assembly assembly capable of increasing durability by stably supporting a planar heating element operating in a high-temperature environment.

Plate heaters are used not only in products such as glass surfaces of refrigerated display cabinets, window systems, automobile glass surfaces, bathroom mirrors, etc., but also in the manufacturing process of products such as in a drying process of drying cleaned semiconductor substrates. That is, the planar heating element is used not only for the purpose of removing the inconvenience caused by fogging or dew condensation due to the difference in ambient temperature in the illustrated cases, but also for the purpose of removing moisture during the manufacturing process.

In general, the planar heating element is generally designed to have a structure in which a conductive heating material is coated on a substrate, a first electrode is installed on one side of the conductive heating material, and a second electrode is installed on the other side. When a DC or AC voltage is applied to the first electrode and the second electrode, a current flows through the conductive heating material and heat is generated.

This planar heating element has a conductive wire patterned therein, and since it operates in a high-temperature environment (500 degrees or more), it is assembled at a desired location using a bracket made of a material without heat and electrical conductivity.

However, when the planar heating element is operated for a long time in a high temperature environment due to the inherent structural characteristics of the planar structure, thermal expansion and contraction occurs, and accordingly, the planar heating element is deformed in the vertical and horizontal directions.

The deformation force of the planar heating element is concentrated on the assembly part supporting the planar heating element, and in the fixed assembly part, as a concentrated load opposite to the deformation force of the planar heating element is generated, cracks are generated in the planar heating element. There is a problem that is damaged.

When a crack is generated in the planar heating element in this way, the heat insulating layer of the planar heating element in which the substrate, the insulating layer, the electrode and the resistor are laminated with a thin thickness is broken, and a short circuit between the substrate and the electrode occurs.

Therefore, an assembly structure capable of stably supporting the planar heating element operating in a high temperature environment to further increase the durability of the planar heating element is required.

Republic of Korea Patent Publication No. 10-2111109 (2020.05.14. Announcement)

It is an object of the present invention to solve the problems of the prior art, the present invention is to provide a planar heating element assembly assembly that can increase the durability of the planar heating element by stably supporting the planar heating element operating in a high temperature environment.

In order to achieve the object of the present invention described above, the planar heating element assembly assembly according to an embodiment of the present invention is disposed between the support frame and the planar heating element, and is provided to cover the lower portion of the coupling hole formed in the planar heating element, and a first coupling member having a first body portion supporting the planar heating element from the support frame, and a first support portion protruding upwardly from the first body portion so as to penetrate the coupling hole; a second coupling member disposed on the upper side of the planar heating element, provided to cover the upper portion of the coupling hole, and having a second body portion supported on the upper surface of the first support portion passing through the coupling hole; and a fixing member for fixing the first coupling member and the second coupling member to the support frame in a state in which the first coupling member and the second coupling member are in close contact with the planar heating element interposed therebetween; The thickness of the first support portion is formed to be thicker than the thickness of the planar heating element so that the planar heating element is deformed in the vertical direction by the heat generated during the planar heating element and the vertical space between the second coupling member is characterized in that it is provided .

In the planar heating element assembly assembly according to an embodiment of the present invention, the width of the first support portion is formed smaller than the width of the coupling hole of the planar heating element so that the planar heating element is deformed in the horizontal direction by the heat generated during operation. , It is also possible to provide a lateral spacing between the planar heating element and the first support.

In the planar heating element assembly assembly according to an embodiment of the present invention, the first support portion is formed with a first support block and a step is formed in the first support block to protrude upward and has a first vertical contact surface on the outer surface. and a second support block to, in this case, the second coupling member is formed to protrude downward from the second body portion to be inserted into the coupling hole, and a second vertical contact surface corresponding to the first vertical contact surface. It may further have a second support provided with.

In the planar heating element assembly assembly according to an embodiment of the present invention, the planar heating element, the first coupling member and the second coupling member may have different coefficients of thermal expansion.

In the planar heating element assembly assembly according to an embodiment of the present invention, the fixing member, one end penetrating the through hole of the first coupling member and the second coupling member is screwed to the fastening hole formed in the support frame. Accordingly, the first coupling member and the second coupling member may be in close contact to be fixedly coupled to the support frame.

In the planar heating element assembly assembly according to an embodiment of the present invention, the planar heating element includes a substrate, a first insulating layer provided on the lower surface of the substrate, and a second insulating layer provided on the upper surface of the substrate, and the A conductive wire patterned on an upper surface of the second insulating layer, a resistance wire patterned on an upper surface of the second insulating layer to be connected to the conductive wire, a third insulating layer provided on the conductive wire and the resistance wire, and the third insulation It may include a contact bracket having a bracket coupling part brazed to one end of the conducting wire exposed to the outside of the layer, and a bracket extension part bent at the bracket coupling part and electrically connected to an external power source.

According to the present invention, by securing the deformation space in the vertical and horizontal directions of the planar heating element that thermally expands or thermally contracts during operation in a high-temperature environment, a strong reaction force between the planar heating element and the assembly assembly is not formed, damage to the planar heating element can be reduced and durability can be increased.

1 is a cross-sectional view (a) and a perspective view (b) showing a planar heating element applied to a planar heating element assembly assembly according to an embodiment of the present invention.
Figure 2 is a partial enlarged view showing other examples of the planar heating element of Figure 1.
Figure 3 is an exploded perspective view showing a planar heating element assembly assembly according to an embodiment of the present invention.
4 is an exploded cross-sectional view (a) and a combined cross-sectional view (b) showing the planar heating element assembly of FIG. 3 .
5 is a perspective view (a) and a coupling cross-sectional view (b) showing the first coupling member and the second coupling member of the planar heating element assembly assembly according to another embodiment of the present invention.
Figure 6 is a coupling cross-sectional view showing the first coupling member and the second coupling member of the planar heating element assembly assembly according to another embodiment of the present invention.

Hereinafter, preferred embodiments of the present invention in which the above-described problems to be solved can be specifically realized will be described with reference to the accompanying drawings. In describing the present embodiments, the same names and reference numerals may be used for the same components, and an additional description thereof may be omitted.

1 is a cross-sectional view (a) and a perspective view (b) showing a planar heating element applied to a planar heating element assembly assembly according to an embodiment of the present invention, Figure 2 is a partial enlarged view showing other examples of the planar heating element of FIG. 3 is an exploded perspective view showing the planar heating element assembly assembly according to an embodiment of the present invention, and FIG. 4 is an separated cross-sectional view (a) and a combined cross-sectional view (b) showing the planar heating element assembly assembly of FIG. 3 .

The present invention is an assembly assembly combining the support frame 100 and the planar heating element 200 disposed on the upper side of the support frame 100, and stably supporting the planar heating element that thermally expands or contracts during operation in a high-temperature environment. Provided is a planar heating element assembly assembly that can significantly increase the durability of the heating element.

The planar heating element assembly assembly according to this embodiment may include a first coupling member 300 , a second coupling member 400 and a fixing member 500 .

First, the support frame 100 may be disposed on the lower side of the planar heating element 200, it can support the planar heating element 200 horizontally.

In addition, a fastening hole 110 may be provided on the upper surface of the support frame 100 , and a screw processing portion may be formed on an inner circumferential surface of the fastening hole 110 .

The planar heating element 200 includes a substrate 210 , a first insulating layer 220 provided on a lower surface of the substrate 210 , a second insulating layer 230 provided on an upper surface of the substrate 210 , and a second The conductive wire 240 patterned on the upper surface of the insulating layer 230, the resistance wire 250 patterned on the upper surface of the second insulating layer 230 to be connected to the conductive wire 240, the conductive wire 240 and the resistance wire 250 It may include a third insulating layer 260 provided on the upper portion.

The substrate 210 may be in the form of a flat plate, and a material such as aluminum or metal may be used, or a non-conductive material such as ceramic may be used.

The first insulating layer 220 may be prepared by coating a first insulating material on the lower surface of the substrate 210 and thermally curing the first insulating material. The first insulating material for forming the first insulating layer 220 may be formed to include fine glass and a binding material.

The second insulating layer 230 may be prepared by coating a second insulating material on the upper surface of the substrate 210 and thermally curing the second insulating material. The first insulating material for forming the first insulating layer 220 may also be formed in a form including fine glass and a binding material.

As the first insulating material and the second insulating material, any material may be used as long as it has insulating properties, and is not particularly limited.

The conductive wire 240 may be patterned on the upper surface of the second insulating layer 230 , and may include a first conductive wire 240 and a second conductive wire 240 having different polarities. For example, the first conductor 240 may be connected to a positive power supply, and the second conductor 240 may be grounded. The conductive wire 240 may be formed of gold (Au), silver (Ag), palladium (Pd), or the like.

The resistance wire 250 may be patterned on the upper surface of the second insulating layer 230 to be connected to the conductive wire 240 , and the first conductive wire and the second conductive wire 240 are connected to generate heat when power is applied to the conductive wire 240 . patterned to do so.

As such, the planar heating element 200 in which the first insulating layer 220, the substrate 210, the second insulating layer 230, the conductive wire 240, the resistance wire 250 and the third insulating layer 260 are stacked in the upper direction. may have a first thickness T1.

And, the planar heating element 200 may further include a contact bracket (600).

Referring to FIG. 2 , the contact bracket 600 may connect one end 240a of the conductive wire 240 exposed to the outside of the third insulating layer 260 to an external power source, and the contact bracket 600 according to the embodiment. ) may include a bracket coupling part 610 coupled to one end of the conductive wire 240 , and a bracket extension part 620 that is bent at the bracket coupling part 610 and is electrically connected to an external power source.

The contact bracket 600 may form a bracket coupling part 610 and a bracket extension part 620 by bending a plate member, as shown in FIG. 2 (a). In addition, the bracket extension part 620 may be formed with a coupling hole into which an end of an external power line is inserted and coupled by bending both sides thereof.

In addition, the contact bracket 600 may form the bracket coupling part 610 and the bracket extension part 620 by bending and bending the bar member, as shown in FIG. 2(b), in which case the annular bracket coupling part 610 indicates that it is possible to put the filler metal for brazing bonding into the inner space in a state in close contact with the one end 240a of the conducting wire 240, and the filler metal injected into the inner space in this way is melted in the brazing process while the conducting wire ( 240) and the bracket coupling portion 610 may be guided to the contact surface to facilitate penetration and diffusion, and accordingly, the bonding quality may be improved.

As such, the bracket coupling unit 610 may be directly brazed to one end of the conductive wire 240 , and as the contact bracket 600 is directly brazed to the conductive wire 240 , the bonding process may be simplified, and a planar heating element A separate fastening means for connecting 200 and the power line may be excluded, and the volume and weight of the planar heating element 200 may be reduced. And, the heating space of the planar heating element 200 may be widened.

In addition, it is preferable that a material having a lower melting point than that of the conductive wire 240 is used for the bracket coupling portion 610 that is brazed to the conductive wire 240 . This is because, if the material is made of a material having a melting point equal to or higher than the melting point of the conductive wire 240 , the conductive wire 240 may be damaged during the brazing process. For example, the bracket coupling part 610 may be made of nickel (Ni) material.

In addition, the planar heating element 200 may be provided with a coupling hole (290).

The coupling hole 290 may be formed in a position and quantity corresponding to the coupling hole 110 of the support frame 100 . In addition, the coupling hole 290 may be formed in the form of a long hole in the horizontal direction of the planar heating element 200, it may be formed to have a first width (W1) in the horizontal direction.

The first coupling member 300 may be disposed between the support frame 100 and the planar heating element 200, and is provided to cover the lower portion of the coupling hole 290 of the planar heating element 200, and the support frame in the central part A first through hole 301 corresponding to the fastening hole 110 of 100 may be provided.

The first coupling member 300 may include a first body portion 310 and a first support portion 320 .

The first body portion 310 may be formed to have an area larger than the size of the coupling hole 290 to cover the lower portion of the coupling hole 290 of the planar heating element 200, and from the upper surface of the support frame 100 The lower surface of the edge of the coupling hole 290 of the planar heating element 200 may be supported.

The first support part 320 may be formed to protrude upward from the upper surface of the first body part 310 and be disposed through the coupling hole 290 of the planar heating element 200 . That is, the first support part 320 may protrude to have a second thickness T2 , and in this case, the second thickness T2 may be thicker than the first thickness T1 .

For the first coupling member 300 , a material different from the planar heating element 200 may be used, and at least a material different from the material of the substrate 210 of the planar heating element 200 may be used. And, the first coupling member 300 may be a material having a thermal expansion coefficient of a size smaller than the thermal expansion coefficient of the substrate 210 of the planar heating element 200 may be used. For example, when the substrate 210 made of aluminum or a metal material is used, a ceramic material may be used for the first coupling member 300 .

The second coupling member 400 may include a second body portion 410, the second body portion 410 may be disposed on the upper side of the planar heating element 200, the planar heating element 200 is a coupling hole It is provided to cover the upper portion of the 290 , and a second through hole 401 corresponding to the fastening hole 110 of the support frame 100 may be provided in the central portion. The second body portion 410 may be supported on the upper surface of the first support portion 320 .

For the second coupling member 400, a material different from the planar heating element 200 may be used, and at least a material different from the substrate 210 material of the planar heating element 200 may be used. In addition, the second coupling member 400 may be a material having a thermal expansion coefficient of a size smaller than the thermal expansion coefficient of the substrate 210 of the planar heating element 200 may be used. For example, when the substrate 210 made of aluminum or a metal material is used, a ceramic material may be used for the first coupling member 300 .

The first coupling member 300 and the second coupling member 400 may be made of the same material.

Alternatively, different materials may be used for the first coupling member 300 and the second coupling member 400 , and in this case, the second coupling member 400 disposed at a position relatively close to the planar heating element 200 is the second coupling member 400 . A material having a lower coefficient of thermal expansion than the first coupling member 300 may be used.

The fixing member 500 is to fix the first coupling member 300 and the second coupling member 400 to the support frame 100 in a state in which the first coupling member 300 and the second coupling member 400 are in close contact. can

The fixing member 500 is coupled to the support frame 100 by passing through the locking part 510 that is caught on the upper surface of the second coupling member 400 and the first coupling member 300 and the second coupling member 400 . It may include a fastening part 520 that is

A screw processing part may be formed at one end of the fastening part 520 facing the support frame 100 . Accordingly, the fastening part 520 passes through the second through-hole 401 of the second coupling member 400 and the first through-hole 301 of the first coupling member 300 in turn, and then passes through the support frame 100 . It may be screwed to the fastening hole 110 and fixed.

Referring to FIG. 4 (b), the first coupling member 300 and the second coupling member 400 by the fixing member 500 are in close contact with each other with the planar heating element 200 interposed therebetween, in a state in which they are in close contact. It may be fixedly coupled to the support frame 100 .

And, it is disposed between the first body portion 310 and the planar heating element 200 of the first coupling member 300 to support the lower surface of the planar heating element 200 from the upper surface of the support frame 100 .

In addition, the first support portion 320 of the first coupling member 300 is disposed inside the coupling hole 290 of the planar heating element 200, the lower surface of the second body portion 410 of the second coupling member 400 will support At this time, since the thickness (T2) of the first support part 320 is formed to be thicker than the thickness (T1) of the planar heating element 200, between the planar heating element 200 and the second coupling member 400, the vertical spacing (A1) ) can be provided.

That is, even if the planar heating element 200 is deformed in the vertical direction by heat during operation, since it is deformed within the space formed by the vertical gap A1, the planar heating element 200 and the first coupling member 300 and the second coupling member The reaction force in the up-down direction due to strong contact between the 400 is not formed.

And, the first coupling member 300 and the second coupling member 400 to prevent damage such as cracks or the conductor 240 bursting in the peripheral region of the coupling hole 290 of the planar heating element 200 in contact with the be able to

In addition, since the width (W2) of the first support part 320 is formed smaller than the width (W1) of the coupling hole 290, between the planar heating element 200 and the first support part 320, the lateral spacing (A2) ) can be provided.

That is, since the planar heating element 200 during operation is deformed in the space formed by the lateral spacing (A2) even if it is deformed in the horizontal direction, that is, in the longitudinal direction by heat, the planar heating element 200 and the first support part 320. Strong between There is no reaction force in the horizontal direction due to contact.

And, the first coupling member 300 and the second coupling member 400, and in contact with the planar heating element 200 in the area around the coupling hole 290, cracks or damage such as bursting can be further prevented.

5 is a perspective view (a) and a coupling cross-sectional view (b) showing the first coupling member and the second coupling member of the planar heating element assembly assembly according to another embodiment of the present invention.

5, the planar heating element assembly assembly according to another embodiment has a difference from the above-described embodiment in the configuration of the first coupling member 300 and the second coupling member 400.

That is, the first coupling member 300 according to the present embodiment includes a first body portion 310 and a first support portion 320 , but the first support portion 320 includes a first support block 321 and a second support block 321 . It may include a support block 322 .

The first support block 321 may be formed to protrude upward from the upper surface of the first body portion 310 to be inserted into the coupling hole 290 of the planar heating element 200 .

The second support block 322 forms a step on the upper surface of the first support block 321, is formed to protrude upward, and is disposed through the coupling hole 290 of the planar heating element 200, and is disposed on the outer surface of the first vertical A contact surface 323 may be provided. As shown, a pair of first vertical contact surfaces 323 symmetrical in the horizontal direction of the planar heating element 200 may be provided.

The second coupling member 400 according to the present embodiment may further include a second support part 420 .

The second support portion 420 is formed to protrude downward from the lower surface of the second body portion 410 to be inserted into the coupling hole 290 of the planar heating element 200, the outer surface of the first vertical contact surface 323 and corresponding to A second vertical contact surface 421 may be provided. As shown, a pair of second support parts 420 having respective second vertical contact surfaces 421 to correspond to a pair of first vertical contact surfaces 323 symmetrical in the horizontal direction of the planar heating element 200 . may be provided.

As shown in Fig. 5 (b), the first vertical contact surface 323 and the second support portion 420 of the second support block 322 in a state in which the first coupling member 300 and the second coupling member 400 are coupled. ), since the second vertical contact surface 421 forms a surface contact state, the first coupling member 300 and the second coupling member 400 with the fixing member 500 disposed on the vertical central axis as the center are each other. Relative rotation can be blocked to maintain a more rigid assembly.

And, before fastening the fixing member 500, the first coupling member 300 and the second coupling member 400 are pre-coupled with the first vertical contact surface 323 and the second vertical contact surface 421 being in surface contact with each other. Therefore, the fastening operation using the fixing member 500 can be performed more easily, and even in the process of screwing the fixing member 500 to the support frame 100 , the first coupling member 300 and the second coupling member 400 . ), inaccurate assembly such as misalignment can be prevented in advance.

On the other hand, Figure 6 is a coupling cross-sectional view showing the first coupling member and the second coupling member of the planar heating element assembly assembly according to another embodiment of the present invention.

First, in the planar heating element assembly assembly according to FIG. 4 (b), the center line of the first coupling member 300, the second coupling member 400 and the fixing member 500 is the coupling hole 290 of the planar heating element 200. The lateral spacing A2 of a certain size is provided along the perimeter of the first support part 320 by matching the center line. On the contrary, the planar heating element assembly assembly shown in FIG. 6 is a first coupling member 300, the second The center line c2 of the coupling member 400 and the fixing member 500 maintains a slightly shifted state in the horizontal direction from the center line c1 of the coupling hole 290 of the planar heating element 200 . That is, the first support part 320 is disposed in close contact with one side (left side in the drawing) of the coupling hole 290 so that only the other side area with respect to the horizontal direction of the planar heating element 200 is provided with a lateral spacing (A2).

In other words, the width of the first support 320 (W2: see Fig. 4 (a)) is formed smaller than the width of the coupling hole 290 (W1: see Fig. 4 (a)), the first support 320 The width W2 and the width W1 of the coupling hole 290 may be set so that the lateral spacing A2 has a minimum size in consideration of the thermal expansion rate of the planar heating element 200 .

By minimizing the size of the coupling hole 290 of the planar heating element 200, even if the planar heating element 200 is deformed in the horizontal direction by heat during operation, since it is deformed within the space formed by the lateral spacing A2, the planar heating element 200 ) and the first support part 320, as well as prevent damage at the contact portion, can increase the contact surface of the planar heating element 200 supported in contact with the first body portion 310, the planar heating element ( 200) can be further increased. In addition, the heating space of the planar heating element 200 can also be wider.

Although the preferred embodiment of the present invention has been described with reference to the drawings as described above, those skilled in the art may vary the present invention in various ways without departing from the spirit and scope of the present invention as set forth in the following claims. may be modified or changed.

100: support frame
200: planar heating element
300: first coupling member
400: second coupling member
500: fixing member

Claims (6)

As an assembly assembly for coupling the support frame and the planar heating element disposed on the upper side of the support frame,
A first body portion disposed between the support frame and the planar heating element, provided to cover the lower portion of the coupling hole formed in the planar heating element, and supporting the planar heating element from the support frame, and the coupling hole to pass through the a first coupling member having a first support portion protruding upwardly from the first body portion;
a second coupling member disposed on the upper side of the planar heating element, provided to cover the upper portion of the coupling hole, and having a second body portion supported on the upper surface of the first support portion penetrating the coupling hole; and
A fixing member for fixing the first coupling member and the second coupling member to the support frame in a state in which the first coupling member and the second coupling member are in close contact with the planar heating element interposed therebetween;
The thickness of the first support portion is formed to be thicker than the thickness of the planar heating element so that the planar heating element is deformed in the vertical direction by the heat generated during operation, and a vertical interval is provided between the planar heating element and the second coupling member, characterized in that A planar heating element assembly assembly. According to claim 1,
By the heat generated during operation, so that the planar heating element is deformed in the horizontal direction, the width of the first support is formed smaller than the width of the coupling hole of the planar heating element, between the coupling hole of the planar heating element and the first support. A planar heating element assembly assembly, characterized in that the gap is provided. According to claim 1,
The first support part includes a first support block and a second support block that is formed to protrude upwardly from the first support block and has a first vertical contact surface on its outer surface,
The second coupling member,
A planar heating element assembly assembly, which is formed to protrude downward from the second body portion so as to be inserted into the coupling hole, and further comprises a second support portion having a second vertical contact surface corresponding to the first vertical contact surface. According to claim 1,
The planar heating element and the planar heating element assembly assembly, characterized in that the first coupling member and the second coupling member have different coefficients of thermal expansion. According to claim 1,
The fixing member is
As one end that passes through the through-holes of the first coupling member and the second coupling member is screwed into the coupling hole formed in the support frame, the first coupling member and the second coupling member are brought into close contact with the support frame. A planar heating element assembly assembly, characterized in that it is fixedly coupled. According to claim 1,
The planar heating element,
board and
a first insulating layer provided on a lower surface of the substrate;
a second insulating layer provided on the upper surface of the substrate;
a conductive wire patterned on an upper surface of the second insulating layer;
a resistance wire patterned on an upper surface of the second insulating layer to be connected to the conductive wire;
a third insulating layer provided on the conductive wire and the resistance wire;
A contact bracket comprising: a bracket coupling part brazed to one end of the conducting wire exposed to the outside of the third insulating layer; and a bracket extension part bent at the bracket coupling part and electrically connected to an external power source A planar heating element assembly assembly characterized by.

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