WO2019054746A1 - Heating element and heater unit comprising same - Google Patents

Abstract

A heating element and a heater unit comprising same are provided. The heating element according to an exemplary embodiment of the present invention comprises: a platelike exterior material; a heat generating source which is disposed inside the exterior material and generates heat when power is applied thereto; and a plurality of vortex flow generating patterns which are repeatedly formed along the lengthwise direction in order to generate a vortex flow in a fluid passing through the surface of the exterior material and thereby decrease the passing speed of the fluid.

Description

A heating element and a heater unit

The present invention relates to a heating element and a heater unit including the same.

A heater unit using a general nichrome wire may cause ignition upon overheating. Accordingly, a heater unit used in an electric vehicle uses a PTC element as a heating element.

However, since a heater using a PTC element as a heating element is limited in increasing the size of the PTC element, a large amount of heat can not be obtained, and since the conductive carbon mixture as a conductor is bonded only to a part of the heating surface of the PTC element, And the temperature transmitted to the radiating fin is different.

Therefore, development of a heating element and a heater unit capable of ensuring a uniform heating temperature and ensuring a large heating value is desired.

As a part of this, a heater unit is developed which realizes a uniform temperature distribution while ensuring a large amount of heat by realizing a heating element in a form in which a plate-shaped heat source is embedded in a casing.

However, in the heater unit in which the heating element is formed in the plate shape, since the fluid to be heated passes through one surface of the heating element and heat exchange occurs, there is a problem that the heat exchange efficiency drops when the fluid passes quickly through one surface of the heating element.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a heating element capable of increasing heat exchange efficiency by delaying a passage time of a fluid even if the heat source is provided in a plate shape, and a heater unit including the heating element.

In order to achieve the above-mentioned object, a plate- A heat generating unit disposed inside the casing and generating heat when power is applied; And a plurality of vortex generation patterns repeatedly formed along the longitudinal direction so as to generate a vortex in the fluid passing through the surface of the casing so as to reduce the passage speed of the fluid.

Also, the vortex generation pattern may be a linear pattern formed along the width direction of the casing, and the linear pattern may be formed such that at least a part of the entire length is not parallel to the width direction of the casing.

For example, the linear pattern may be a slanting pattern formed at an angle with respect to a straight line parallel to the width direction of the casing.

Alternatively, the linear pattern may be formed along the width direction of the casing, and the linear pattern may be a curved pattern formed in a wavy shape including at least one inflection point.

Alternatively, the linear pattern may include a linear pattern portion formed in parallel with a straight line parallel to the width direction of the casing, in a region corresponding to the heat source.

In this case, the linear pattern may further include two curved pattern portions or two oblique pattern portions each extending from both ends of the linear pattern portion, wherein the two curved pattern portions are convexly formed in the same direction, As shown in Fig. In addition, the two oblique line pattern portions may extend from opposite ends of the linear pattern portion so as to extend in the same direction or opposite to each other.

Also, the vortex generation pattern may be formed in the casing and the heat source, and the vortex generation pattern formed on the casing and the vortex generation pattern formed on the heat source may be formed to coincide with each other.

The outer casing may be a thermally conductive outer tube having a hollow plate inside, and the heating body further includes a pair of terminal tubes connected to both ends of the heat source, at least a part of which protrudes outside the thermally conductive outer tube can do.

In this case, the thermally conductive outer tube may be a metal tube having open ends, and the pair of terminal tubes may be connected to the heat source so as to surround the end side of the heat source for a predetermined length. An insulating layer may be interposed between the inner surface of the outer tube and the one surface of the heat source facing each other, the inner surface of the facing material facing each other, and one surface of the terminal tube.

In addition, the heat source may be a plate-shaped conductive member including at least one of a cantalum and a pecaloy alloy.

According to another aspect of the present invention, there is provided a semiconductor device comprising: a plurality of heaters arranged at intervals spaced apart from each other; And a frame for fixing both ends of the plurality of heating elements.

The plurality of heating elements may include a first heating element and a second heating element disposed on a lower side of the first heating element. The vortex generating pattern formed on the first heating element and the vortex generating pattern formed on the second heating element They may be formed in the same pattern.

Alternatively, the plurality of heating elements may include a first heating element and a second heating element disposed on a lower side of the first heating element, and the vortex generating pattern formed on the first heating element and the vortex generating pattern formed on the second heating element And the first heating element and the second heating element may be disposed such that the slanting pattern formed on the first heating element faces different directions from the slanting pattern formed on the second heating element.

According to the present invention, the heat generating element can generate the eddy current including the vortex generating pattern, thereby increasing the heat exchange efficiency by increasing the residence time of the fluid.

1 is a view illustrating a heating element according to an embodiment of the present invention,

2 (a) to 2 (g) are views showing various forms of a vortex generating pattern that can be applied to a heating element according to an embodiment of the present invention,

FIGS. 3 and 4 are views illustrating a process of inserting both ends of a heat source in a heating tube in a terminal tube according to an embodiment of the present invention;

FIG. 5 is a view showing a state in which the insulating layer is disposed in FIG. 4,

FIG. 6 and FIG. 7 are views showing a state in which the external tube is coupled in FIG. 5,

FIGS. 8A to 8D are cross-sectional views illustrating various shapes that can be implemented as a heating element in a heating element according to an embodiment of the present invention,

9 and 10 are views showing another form of a casing according to an embodiment of the present invention,

11 is a view showing another embodiment of the casing in the heating body according to the embodiment of the present invention,

12 is a schematic view showing a case where a heating element according to an embodiment of the present invention includes an insulating member,

13 is a sectional view taken along the line B-B in Fig. 12,

Fig. 14 is a view showing another type of heating element using the heating element of Fig. 1,

15 is a view illustrating a heater unit according to an embodiment of the present invention;

16 is a view illustrating a heater unit according to another embodiment of the present invention,

17 is a view showing another type of heater unit using the heating element shown in Fig.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings, which will be readily apparent to those skilled in the art to which the present invention pertains. The present invention may be embodied in many different forms and is not limited to the embodiments described herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and the same or similar components are denoted by the same reference numerals throughout the specification.

The heating element according to an embodiment of the present invention may include a covering material 140, a heat generating source 110, and a vortex generating pattern 180, as shown in FIG.

The heat-radiating member 110 may be disposed inside the casing 140 and generate heat when the power is applied. Details of the outer casing 140 and the heat generating unit 110 will be described later.

In this case, the vortex generating pattern 180 may be formed along the longitudinal direction of the heating element 100 according to an embodiment of the present invention. Such a vortex generation pattern 180 can change the traveling path of the fluid passing over the surface of the heating element to generate a vortex. Accordingly, the heating rate of the fluid passing through the surface of the heating element 100 can be reduced by the vortex so that the residence time of the fluid in contact with the surface of the heating element 100 is increased . Thus, the heat emitting body 100 according to the embodiment of the present invention can increase the heat exchange efficiency with the fluid passing through the heat emitting body 100.

The vortex generation pattern 180 may be formed such that the hill 181 and the valley 182 are repeatedly formed along the longitudinal direction of the heating body 100. The hill 181 and the valley 182 may be formed of a fluid May be formed along the traveling direction. The crests 181 and the valleys 182 may include at least a portion that is not parallel to the traveling direction of the fluid.

For example, the vortex generation pattern 180 may be a linear pattern formed along the width direction of the casing member 140. At least a part of the length of the linear pattern may be a width direction of the casing member 140 As shown in FIG.

At this time, the vortex generation pattern 180 may be formed only on the side of the casing member 140, or may be formed on the side of the heat source 110 together with the casing member 140. In this case, the vortex generation pattern formed on the outer casing 140 and the vortex generation pattern formed on the heat generating source 110 may be formed to coincide with each other.

Accordingly, the outer casing 140 and the heat generating source 110, which are formed so that the vortex generating patterns 180 coincide with each other, can always have the same behavior through the vortex generating pattern. Therefore, the outer casing 140 and the heat generating unit 110 can always generate the same movement, so that the heat source 110, which may occur in different behaviors, can be prevented from being damaged.

The vortex generation pattern 180 may be formed in a shape of a slanting line pattern formed at an angle with respect to a straight line parallel to the width direction of the casing member 140 as shown in FIGS. 2A and 2B, Lt; / RTI > 2 (c), the vortex generating pattern 180 is formed along the width direction of the casing member 140 and has a curved pattern formed in a wavy shape having at least one inflection point 185 .

The vortex generation pattern 180 may include a linear pattern portion 186 formed parallel to a straight line parallel to the width direction of the casing member 140. The linear pattern portion 186 may be formed in the heat generating source 110). ≪ / RTI >

The vortex generating pattern 180 may be formed in the case where the plate heat source 110 disposed inside the casing member 140 includes the same vortex generation pattern as the vortex generation pattern 180 formed on the casing. So that the user can be protected through the Internet.

That is, the linear pattern portion 186 formed on the heat source 110 can cancel shrinkage and relaxation in the longitudinal direction of the heat generating source 110 together with the linear pattern portion 186 formed on the exterior material, 110). In addition, even though the heat source 110 and the casing 140 are made of different materials and have different shrinkage and expansion ratios depending on material differences, the heat sources 110 and the casing material 140 are formed to be coincident with each other, The linear contour portion 186 and the linear pattern portion 186 of the covering material can compensate for different contraction expansion rates according to the material difference.

2 (d) to 2 (g), the vortex generating pattern 180 may be formed in a region corresponding to the width of the heat generating source 110 of the entire width of the casing member 140, And a straight line pattern portion 186 formed parallel to a straight line parallel to the width direction of the casing member 140.

In this case, the vortex generation pattern 180 includes two curved pattern portions 184a and 184b extending from both ends of the linear pattern portion 186 along the width direction of the covering material 140 And two oblique line pattern portions 183a and 183b extending linearly along the width direction of the exterior material 140 from both ends of the linear pattern portion 186. [

When the vortex generating pattern 180 includes two curved pattern units 184a and 184b, the two curved pattern units 184a and 184b are arranged in the same direction as shown in FIG. 2 (e) Or may be formed convexly in opposite directions as shown in FIG. 2 (d). 2 (f), when the vortex generation pattern 180 includes two oblique line pattern portions 183a and 183b, the two oblique line pattern portions 183a and 183b are arranged in a line May extend in the opposite directions to each other with the pattern portion 186 as a boundary, or may extend in the same or similar direction as the boundary of the linear pattern portion 186 as shown in Fig. 2 (g) have.

As described above, the heating element 100 according to the embodiment of the present invention can generate a vortex by changing the traveling path of the fluid passing through the surface of the heating element 100 through the vortex generating pattern 180. As a result, the traveling velocity of the fluid passing through the surface of the heating body 100 may be lowered by the vortex formed through the vortex generating pattern 180. Therefore, the time required for the fluid passing through the surface of the heating body 100 to stay on the surface of the heating body 100 can be increased, and the heat exchange efficiency generated between the heating body 100 and the fluid can be increased.

The outer casing 140 protects the heat source 110 received therein and can dissipate the heat generated from the heat source 110.

To this end, the outer sheath 140 may be made of a metal material, and may be formed in a hollow shape having both ends open.

For example, the outer sheath 140 may be a thermally conductive metal tube having a hollow plate shape inside, and the thermally conductive metal tube may be a hollow metal tube including copper or aluminum material having excellent thermal conductivity.

The thermally conductive metal tube may be changed into a plate shape by being pressurized through an external force in a state where the heat source 110 is inserted.

For example, the outer casing 140 can be changed to an elliptical shape through the primary pressurization of the outer casing 140, and the elliptical shape of the outer casing 140 can be changed in a state where the heat generating source 110 is inserted into the outer casing 140 The oval outer cover 140 can be changed to a plate shape by pressing the outer cover 140 of the oval shape.

However, the present invention is not limited to the above-described method in which the outer casing 140 is formed in a plate-like shape. The outer casing 140 may be formed in a plate-like shape by a single pressing process in a state where the heat generating source 110 is inserted into the casing. .

As another example, the casing member 140 may be a plate-shaped metal sheet having a predetermined area as shown in FIGS. 9 and 10, and the plate-shaped metal sheet may have a heat source 110 disposed on one surface thereof A part of the metal sheet may be folded so as to cover the heat source 110. In such a case, the plate-like metal sheet may be sealed at portions where the metal sheets are in contact with each other.

As another example, the outer casing 140 may be composed of two metal sheets 141 and 142 having a predetermined area as shown in FIG. 11, and the two metal sheets 141 and 142 may face each other And then the two edges that come into contact with each other may be sealed. In such a case, the rim side 170 of the two metal sheets 141, 142 that are in contact with each other may be sealed through a variety of known methods such as ultrasonic welding, adhesives, and the like.

The heat source 110 may be disposed inside the casing 140 to generate heat when power is applied. At this time, the heat source 110 may be a plate-like conductive member having a predetermined width and length.

For example, the heat source 110 may be a plate-shaped metal sheet having a predetermined area, and the metal sheet may be formed of aluminum, copper, amorphous ribbon sheet, or the like.

Preferably, the heat source 110 may be a plate-shaped conductive member including at least one of a cantalum and a pecaloy alloy so as to prevent crystallization even when thermal fatigue occurs due to repeated heating and cooling.

At this time, an insulating layer 120 for electrical insulation may be disposed between the inner surface of the casing member 140 and one surface of the heat generating member 110.

Accordingly, even though the casing member 140 is made of a conductive metal and a heat source 110 made of a conductive member is disposed in the casing member 140, the heat source 110 and the casing member 140 can be made of a conductive material, Electrical shorts can be prevented through the first electrode 120.

The insulating layer 120 may be insulative for electrical insulation and may have insulation and heat resistance so as to prevent damage due to heat generated in the heat generating source 110.

For example, the insulating layer 120 may be a coating layer 121 coated with a coating liquid having insulation and heat resistance, and may be a film member 122 made of a resin material having insulation and heat resistance. And the film member 122 may be combined with each other. Here, when the insulating layer 120 is a film member 122, the film member 122 may be attached to one surface of the heat generating source 110 through the adhesive layer 130.

As a specific example, the insulating layer 120 may be a coating layer 121 formed on both surfaces of the heat generating source 110, as shown in FIG. 8 (a).

The insulating layer 120 may be a film member 122 attached to both surfaces of the heat generating source 110 via an adhesive layer 130 as shown in FIG. 8 (b).

8 (c), the insulating layer 120 may be a coating layer 121 and a film member 122 formed on both surfaces of the heat generating source 110, May be attached to one surface of the heat source 110 via an adhesive layer 130.

In the present invention, the coating liquid may be a liquid polyimide (PI) coating liquid, and the film member 122 may be a polyimide (PI) film, but the present invention is not limited thereto. All known materials can be used. In addition, the thicknesses of the coating layer 121 and the film member 122 may be appropriately changed according to design conditions. In addition, when the coating liquid has adhesiveness with heat resistance and insulation, the above-described adhesive layer 130 can be omitted.

As another example, when the exterior member 140 is made of aluminum, the exterior member 140 may be an anodized surface as shown in FIG. 8 (d) May be an anodized surface. Accordingly, the inner surface of the outer casing 140 and the one surface of the heat generating source 110, which are in contact with each other, can be insulated from each other through the anodized surface. In this case, since the anodized film is formed on the anodized surface of the casing member 140, the insulating layer 120 can be omitted because of the insulating property.

Meanwhile, the heating element 100 according to an embodiment of the present invention may further include a terminal tube 160 for electrically connecting to the outside, and the terminal tube 160 may be made of a conductive material.

The terminal tube 160 may be connected to the heat sources 110 at both ends of the heat source 110 to apply power to the heat source 110 from the outside.

At this time, the terminal tube 160 may be a hollow metal tube made of a metal material, and the metal tube may surround at least a part of the end of the heat generating source 110, As shown in FIG.

That is, the terminal tube 160 may be disposed such that at least a portion of the terminal tube 160 is located inside the casing 140 in a state where the terminal tube 160 is fastened to both ends of the heat source 110 as shown in FIG. The terminal tube 160 may be formed in a plate shape by being pressed together with the casing member 140 when the casing member 140 is formed in a plate shape in a hollow metal tube through the pressurization.

However, the connection method of the terminal tube 160 and the heat generating source 110 is not limited thereto, and any known bonding method can be applied as long as the heat can be electrically connected to the heat generating source 110.

At this time, the heat source 110 and the pair of terminal tubes 160 may be electrically connected to each other through a simple contact, but various methods may be applied to improve electrical reliability.

For example, the heat generating source 110 and the terminal tube 160 may be provided with a conductive adhesive at portions overlapping each other. Alternatively, the heat source 110 and the terminal tube 160 may be partially caulked at portions overlapping each other. In addition, the heat source 110 and the terminal tube 160 may be fixed to each other through spot welding.

Here, the above-described insulating layer 120 may be interposed between the inner surface of the facing member 140 and the one surface of the terminal tube 160 facing each other. The terminal tube 160 may be electrically insulated from the exterior material 140 through the insulating layer 120 even if the terminal tube 160 partially or wholly overlaps the exterior material 140.

Meanwhile, the heating element 100 according to an embodiment of the present invention can prevent the insulation layer 120 from being damaged by minimizing the shrinkage expansion rate of the substrate itself along the longitudinal direction through the vortex generating pattern 180 described above .

That is, as described above, the vortex generating pattern 180 is repeatedly formed on the heat source 110 and the casing 140 along the longitudinal direction of the heating body 100, such that the crest 181 and the valley 182 are repeatedly formed And the vortex generation pattern formed on the heat source 110 and the vortex generation pattern formed on the exterior material 140 may be formed to coincide with each other. The vortex generating pattern 180 may be formed on the terminal tube 160 and the vortex generating pattern formed on the terminal tube 160 may be formed on the vortex generating pattern formed on the heat generating source 110 and the outer casing 140 The vortex generation patterns can be formed to coincide with each other.

Accordingly, the heating element 100 according to an embodiment of the present invention is interposed between the casing member 140 and the heat source 110, the terminal tube 160, and the casing member 140 through the vortex generating pattern 180 It is possible to prevent the insulating layer 120 from being broken.

The heating element 100 according to an embodiment of the present invention is configured such that the insulating layer 120 is always connected to the exterior material 140 and the heat generating source 110 or the terminal tube 160 through the vortex generating pattern 180 formed to coincide with each other. And the exterior material 140 can be maintained in close contact with each other, thereby minimizing or preventing the possibility of occurrence of an air gap.

As a result, the heat generated by the heat source 110 can be smoothly transmitted to the exterior material 140 because heat insulation due to the air gap can be prevented.

When the vortex generating pattern 180 is formed on the terminal tube 160, the vortex generating pattern 180 formed on the terminal tube 160 may be formed in such a manner that the terminal tube 160 and the casing 140 overlap each other Region. ≪ / RTI >

Accordingly, the terminal tube 160 and the casing 140 can be fixed to each other through the vortex generating pattern 180 formed in the overlapping area. Accordingly, a separate adhesive member for fixing the terminal tube 160 and the casing member 140 to each other may be omitted.

Meanwhile, the heating element 100 according to an embodiment of the present invention may further include insulating members 190 and 190 '. At this time, the insulating members 190 and 190 'may be arranged to enclose a part of the terminal tube 160 and a part of the casing member 140, as shown in FIGS. 1 and 12.

Such insulation members 190 and 190 'can prevent a short circuit between the terminal tube 160 and the casing member 140 due to factors such as sparks when power is supplied from the outside.

Here, the insulating member 190, 190 'may be made of a nonconductive material, and any known nonconductive material such as rubber or silicone resin may be used.

1, the insulating member 190 may be formed in a tube shape to surround a part of the terminal tube 160. In addition to the terminal tube 160, the insulating member 190 And the like.

As another example, the insulating member 190 'may be a molding body that simultaneously encloses a portion of the casing member 140 and a portion of the terminal tube 160, as shown in FIGS. 12 and 13. In such a case, the surface member 140 may be surface-treated to improve the bonding strength with the insulating member 190 '. That is, a known primer layer may be formed at a portion of the outer casing 140 that is in contact with the insulating member 190 '.

Meanwhile, the insulating member 190, 190 'may have a length of at least 10 mm to 15 mm. As a result, a part of the terminal tube 160 exposed to the outside can maintain a gap of at least 10 mm to 15 mm with the exterior material 140 exposed to the outside. Therefore, the heating element 100 according to the embodiment of the present invention can prevent the terminal tube 160 from being short-circuited with the casing member 140 due to factors such as sparks, thereby improving the electrical reliability have.

However, the overall length of the insulating member 190, 190 'is not limited thereto, and may be changed to an appropriate length according to design conditions if electrical reliability can be enhanced.

Although the heating element 100 has been illustrated and described as being implemented through a thermally conductive external tube having a heat source 110 disposed therein and a terminal tube connected to the heat source 110, the present invention is not limited thereto, The detailed configuration can be changed variously if it is implemented in a plate form. However, it is sufficient that the vortex generating pattern 180 described above is formed along the longitudinal direction of the heating element implemented in a plate shape.

Meanwhile, the heating element 100 according to the embodiment of the present invention may be formed by stacking the heating elements 100 such that the middle portions of the heating elements 100 are folded at least one time and then one side is in contact with the other.

For example, as shown in FIG. 14, the heating element 100 may have a shape in which a part of the entire length is folded at least once and then a folded part is laminated on the remaining part, A passage 183 may be formed.

Specifically, the heating element 100 may be configured such that the terminal tubes 160 on both sides face the same direction after the middle of the heating element 100 is folded at least once so that the opposite surfaces thereof contact each other. In this case, the valley portion 182 of the heating element 100 disposed on the upper side can be brought into contact with the peak portion 181 of the heating element 100 disposed on the lower side, A passage 183 through which the fluid passes may be formed through the crest 181 of the heat source 100 and the valley 182 of the heat emitting body 100 disposed on the lower side.

Accordingly, when the heater unit 200 " is implemented using the heating element 100 of the embodiment shown in FIG. 14, the number of the heating elements 100 can be reduced, thereby simplifying the assembly process.

For example, in the case where the heater unit 200 " includes heating elements stacked in 12 layers as shown in Fig. 17, even if only three heating elements 100 shown in Fig. 14 are used, A laminated form can be realized.

Meanwhile, the heating element 100 described above may be embodied as a heater unit 200, 200 ', 200 "for heating fluid.

For example, the heater units 200, 200 ', 200 "may include a frame 220 for fixing the plurality of heating elements 100 as shown in FIGS. 15 to 17. In this case, The heating elements 100 may be spaced apart from each other along the height direction of the frame 220, and both ends may be fixed to the frame 220.

The plurality of heating elements 100 disposed along the height direction of the frame 220 may be formed as shown in FIGS. 2 (a) to 2 (g) The heat generating element 100 may have any one of the illustrated vortex generating patterns 180.

In such a case, the heater units 200, 200 ', 200 "may have the vortex generating patterns 180 having the same shape as the plurality of heating elements 100 fixed to the frame 220, And the vortex generating patterns 180 formed in the respective heating elements 100 may be arranged to face in different directions when the plurality of heating elements 100 have the same vortex generating pattern 180 .

For example, as shown in FIG. 15, the heater units 200 and 200 'may have a vortex generating pattern 180 having the same shape as the plurality of heating elements 100, The vortex generation patterns 180 may be arranged to face in different directions.

In this case, the heater unit 200, 200 ', 200 "may include a passage 183 through which a fluid can pass between the plurality of heating elements 100, A vortex may be generated in the process of passing through the passage 183 through the vortex generation pattern 180 formed in the heating body 100.

Accordingly, the passage time of the fluid passing through the passage 183 can be delayed by the vortex formed through the vortex generating pattern 180 formed in each of the heating elements 100, 200 ', 200' The heater unit 200, 200 ', 200' 'can increase the residence time of the fluid passing through the passage 183 and thus can be heated in a short time through sufficient heat exchange with the heating element 100, The heating can be performed by using the heat that has been heated by the heating means.

The heater unit 200, 200 ', 200' 'according to an embodiment of the present invention is configured to heat the heating element 100 in the process of passing the heated fluid through the passage 183 through heat exchange with the heating element 100 The heating time can be shortened.

In addition, the heater unit 200, 200 ', 200' 'according to the embodiment of the present invention includes the vortex generating pattern 180 formed in a plate shape and repeatedly formed along the longitudinal direction of each of the heating elements 100, 100 can have a wide heat generating area, so that the contact area and heating area between the fluid passing through the passage 183 and the heating body 100 can be increased, and a large amount of heat can be secured.

The heater unit 200 'according to an exemplary embodiment of the present invention may include a plurality of heating elements disposed along the height direction of the frame 220, The diagonal patterns formed on the respective heating elements may have different angles.

For example, as shown in FIG. 16, the heater unit 200 'may include a first heating element 100a and a second heating element 100b disposed below the first heating element 100a, The slope of the vortex generation pattern 180 formed in the first heating element 100a and the slope of the vortex generation pattern 180 formed in the second heating element 100b may have different angles.

For example, the first heating element 100a may be a slanting pattern shown in FIG. 2 (a) where the slope of the vortex generating pattern 180 is? 1, and the second heating element 100b may be a vortex generating pattern 180 of the first heating element 100a and the second heating element 100b may be a diagonal pattern shown in FIG. 2B with a slope of? 2, and the vortex generation pattern 180 of the first heating element 100a and the vortex generation pattern 180 of the second heating element 100b May be arranged to face in different directions.

In this case, the sizes of? 1 and? 2 may be the same, but the sizes of? 1 and? 2 may be different from each other.

Accordingly, in the heater unit 200 'according to the embodiment of the present invention, the heating elements 100a and 100b formed with different slopes or directions of the vortex generation pattern 180 may be arranged vertically. Accordingly, the heater unit 200 'according to the present embodiment maximizes the generation of vortices in the process of passing the fluid through the passage 183 formed between the first heating element 100a and the second heating element 100b . Accordingly, the heater unit 200 'according to the present embodiment can further increase the residence time of the fluid in contact with the heating elements 100a and 100b, thereby further enhancing the heat exchange efficiency between the fluid and the heating element.

The heater unit 200 " shown in Fig. 17 may be a configuration in which the three heating elements 100 shown in Fig. 13 are mounted on the frame 220. In this case, The valleys 182 of the heating elements 100 can be brought into contact with the peaks 181 of the heating elements 100 arranged on the lower side and the peaks 181 of the heating elements 100 disposed on the upper side, And a passage 183 through which the fluid passes through the valley portion 182 of the heating element 100 disposed on the lower side.

The heater unit 200, 200 ', 200 "may further include a current cutoff unit 230 electrically connected to the heating element 100. The current cutoff unit 230 may include a series element 231, And may be electrically connected to the heating element 100 through the through holes.

The current cut-off unit 230 may cut off the power applied to the heating element 100 when the heating element 100 is heated to a predetermined temperature or higher. Thus, the safety of the heating element 100 can be enhanced.

For example, the current cut-off unit 230 may be a known PTC device, but not limited thereto, and various known devices can be used as long as they can turn on / off the power.

Although the current interruption unit 230 is illustrated as being disposed outside the frame 220, the current interruption unit 230 is not limited thereto, Or may be disposed inside the frame 220. In this case, the total size of the heater units 200, 200 ', 200 "can be reduced, thereby reducing the space for installing the heater units 200, 200', 200".

The heating element and the heater unit described above may be applied to a vehicle air conditioner heater installed on the air conditioner side of the vehicle and heating the air sucked into the air conditioner side. However, the use of the heating element and the heater unit is not limited thereto, and it can be applied to any product in which the temperature of the fluid is raised through heat exchange.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.

Claims (16)

Sheathing; A heat generating unit disposed inside the casing and generating heat when power is applied; And And a plurality of vortex generation patterns repeatedly formed along the longitudinal direction so as to generate a vortex in the fluid passing through the surface of the casing so as to reduce the passage speed of the fluid. The method according to claim 1, Wherein the vortex generation pattern is a linear pattern formed along the width direction of the casing, and the linear pattern is formed such that at least a part of the entire length is not parallel to the width direction of the casing. 3. The method of claim 2, Wherein the linear pattern is formed in a slanting pattern inclined at a predetermined angle with respect to a straight line parallel to the width direction of the casing. 3. The method of claim 2, Wherein the linear pattern is formed along a width direction of the casing, and is formed in a wavy shape including at least one inflection point. 3. The method of claim 2, Wherein the linear pattern includes a linear pattern portion formed in a region corresponding to the heat source in parallel with a straight line parallel to a width direction of the casing. 6. The method of claim 5, Wherein the linear pattern further includes two curved pattern portions or two oblique pattern portions each extending from both ends of the linear pattern portion. The method according to claim 6, Wherein the two curved pattern portions are convexly formed in the same direction or convexly formed in the opposite direction. The method according to claim 6, Wherein the two oblique line pattern portions extend from opposite end portions of the linear pattern portion so as to extend in the same direction or in opposite directions to each other. The method according to claim 1, Wherein the vortex generating pattern is formed in the casing and the heat source respectively, Wherein the vortex generation pattern formed on the casing is formed to coincide with the vortex generation pattern formed on the heat source. The method according to claim 1, The outer casing is a thermally conductive outer tube having a hollow plate shape inside, Wherein the heating element further includes a pair of terminal tubes connected to both ends of the heat source and at least a part of which protrudes to the outside of the thermally conductive outer tube. 11. The method of claim 10, Wherein the thermally conductive outer tube is a metal tube having open ends at both ends and the pair of terminal tubes are connected to the heat source so as to surround the end side of the heat source at a predetermined length. 11. The method of claim 10, Wherein an insulating layer is interposed between an inner surface of the outer tube and a surface of the heat source facing each other and an inner surface of the outer casing facing one another and one surface of the terminal tube facing each other. The method according to claim 1, Wherein the heat source is a plate-like conductive member including at least one of a cantalum and a pecaloy alloy. 14. A heat generating element according to any one of claims 1 to 13, wherein the plurality of heat generating elements are spaced apart from each other with a gap therebetween; And And a frame for fixing both ends of the plurality of heating elements. 15. The method of claim 14, Wherein the plurality of heating elements include a first heating element and a second heating element disposed on a lower side of the first heating element, Wherein the vortex generation pattern formed on the first heating element and the vortex generation pattern formed on the second heating element are formed in the same pattern. 15. The method of claim 14, Wherein the plurality of heating elements include a first heating element and a second heating element disposed on a lower side of the first heating element, The vortex generation pattern formed on the first heating element and the vortex generation pattern formed on the second heating element are an oblique pattern, Wherein the first heating element and the second heating element are disposed such that the slanting line pattern formed on the first heating element faces different directions from the slanting pattern formed on the second heating element.

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