KR102292906B1 - Heater core, heater and heating system including thereof - Google Patents

Abstract

An embodiment includes a plurality of first substrates; first ceramics respectively disposed on the plurality of first substrates; a heating element disposed on the first ceramic; a second ceramic disposed on the heating element; and a connection part disposed at both ends of the heating element, wherein the connection part includes: a first connection member disposed at one end of the heating element; and a second connection member disposed at the other end of the heating element, wherein the first connection member is positioned in a direction opposite to the second connection member with respect to the heating element, and a second connection member disposed on an adjacent first substrate A heater core connected to a member is disclosed.

Description

A heater core, a heater, and a heating system including the same

The embodiment relates to a heater and a heating system including the same.

An automobile includes an air conditioning device for providing thermal comfort in an interior, for example, a heating device that performs heating through a heater, and a cooling device that performs cooling through a refrigerant circulation.

In the case of a general internal combustion engine vehicle, since a large amount of waste heat is generated from the engine, it is easy to secure the heat required for heating therefrom. On the other hand, in the case of an electric vehicle, less heat is generated compared to an internal combustion engine vehicle, and there is a problem that heating for the battery is also required.

Accordingly, the electric vehicle requires a separate heating device, and it is important to increase the energy efficiency of the heating device.

However, the heater core of the heating device is weak against thermal shock, and there is a problem in that it is difficult to connect in series.

The embodiment provides a heater and a heating system including the same.

In addition, a heater having improved heat distribution to prevent thermal shock and cracking is provided.

In addition, there is provided a heater having an improved degree of freedom in design because it is easy to electrically connect in series.

In addition, there is provided a heater in which the manufacturing cost is reduced by reducing the material for the electrical connection.

The problem to be solved in the embodiment is not limited thereto, and it will be said that the purpose or effect that can be grasped from the solving means or embodiment of the problem described below is also included.

A heater core according to an embodiment of the present invention includes a plurality of first substrates; first ceramics respectively disposed on the plurality of first substrates; a heating element disposed on the first ceramic; a second ceramic disposed on the heating element; and a connection part disposed at both ends of the heating element, wherein the connection part includes: a first connection member disposed at one end of the heating element; and a second connection member disposed at the other end of the heating element, wherein the first connection member is positioned in a direction opposite to the second connection member with respect to the heating element.

The first connecting member and the second connecting member may be symmetrical with respect to the heating element.

The first connection member may be connected to a second connection member disposed on an adjacent first substrate.

A second substrate disposed on the second ceramic and surrounding the plurality of first substrates, the first ceramic, the heating element, and the second ceramic may be further included.

The second substrate may include a protrusion extending in a thickness direction of the heater core, and a length of the protrusion in the thickness direction of the heater core may be greater than lengths of the first ceramic, the heating element, and the second ceramic. .

The protrusion may contact at least one side surface of the first substrate.

In a connection direction of the plurality of first substrates, the protrusion may not overlap the connection part.

It may further include a hollow cover, wherein the plurality of first substrates, the first ceramic, the heating element, and the second ceramic may be disposed in the hollow.

In a connection direction of the plurality of first substrates, the cover part may not overlap the connection part.

At least one sensor unit disposed between the heating elements and having a positive temperature coefficient may be further included.

The sensor unit may block an electrical flow of the connection unit at a predetermined temperature.

A heater according to an embodiment of the present invention includes a power module; and a heating module electrically connected to the power module to generate heat, wherein the heating module includes a plurality of heat dissipation fins and a plurality of heater cores that are alternately disposed, and the heater core includes a plurality of first Board; first ceramics respectively disposed on the plurality of first substrates; a heating element disposed on the first ceramic; a second ceramic disposed on the heating element; and a connection part disposed at both ends of the heating element, wherein the connection part includes: a first connection member disposed at one end of the heating element; and a second connection member disposed at the other end of the heating element, wherein the first connection member is positioned in a direction opposite to the second connection member with respect to the heating element.

A heating system according to an embodiment of the present invention includes a flow path through which air moves; an air supply unit for introducing air; an exhaust unit for discharging air into the interior of the moving means; and a heater disposed between the air supply unit and the exhaust unit in the flow path to heat air, the heater comprising: a power module; and a heating module electrically connected to the power module to generate heat, wherein the heating module includes a plurality of heat dissipation fins and a plurality of heater cores that are alternately disposed, and the heater core includes a plurality of first Board; first ceramics respectively disposed on the plurality of first substrates; a heating element disposed on the first ceramic; a second ceramic disposed on the heating element; and a connection part disposed at both ends of the heating element, wherein the connection part includes: a first connection member disposed at one end of the heating element; and a second connection member disposed at the other end of the heating element, wherein the first connection member may be positioned in a direction opposite to the second connection member with respect to the heating element.

According to the embodiment, it is possible to implement a heater applicable to automobiles and the like.

In addition, the heat distribution is improved, so that it is possible to manufacture a heater that prevents thermal shock and cracks.

In addition, it is possible to manufacture a heater with improved design freedom and manufacturing cost because it is easy to electrically connect in series.

Various and advantageous advantages and effects of the present invention are not limited to the above, and will be more easily understood in the course of describing specific embodiments of the present invention.

1 is a perspective view of a heater according to an embodiment;
2 is a plan view of a heat generating module according to the embodiment;
3 is an exploded perspective view of a heater core according to the embodiment;
4 is a perspective view of a heater core according to an embodiment;
5 is a view for explaining heat dissipation by area of the heater core according to the embodiment in FIG. 4;
6 is a perspective view of a heater core according to another embodiment;
7 is a view for explaining heat dissipation by area of a heater core according to another embodiment;
8 is a view showing the connection state of the heater core,
9a to 9c are views showing various connection states of the heater core,
10 is a side view of a heater core according to an embodiment;
11A is a cross-sectional view of a heater core according to an embodiment;
11b to 11c are modified examples of FIG. 11a,
12A to 12B are flowcharts illustrating a method of manufacturing a heater core according to an embodiment;
13A is a perspective view of a heater core including a sensor unit;
Figure 13b is a view showing the effect of Figure 13a,
14 is a conceptual diagram illustrating a heating system according to an embodiment.

Since the present invention can have various changes and can have various embodiments, specific embodiments are illustrated and described in the drawings. However, this is not intended to limit the present invention to specific embodiments, and it should be understood to include all modifications, equivalents and substitutes included in the spirit and scope of the present invention.

Terms including an ordinal number such as second, first, etc. may be used to describe various elements, but the elements are not limited by the terms. The above terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the second component may be referred to as the first component, and similarly, the first component may also be referred to as the second component. and/or includes a combination of a plurality of related listed items or any of a plurality of related listed items.

When a component is referred to as being “connected” or “connected” to another component, it is understood that the other component may be directly connected or connected to the other component, but other components may exist in between. it should be On the other hand, when it is mentioned that a certain element is "directly connected" or "directly connected" to another element, it should be understood that the other element does not exist in the middle.

The terms used in the present application are only used to describe specific embodiments, and are not intended to limit the present invention. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present application, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical and scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. Terms such as those defined in commonly used dictionaries should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

Hereinafter, the embodiment will be described in detail with reference to the accompanying drawings, but regardless of the reference numerals, the same or corresponding components are given the same reference numerals, and the overlapping description thereof will be omitted.

1 is a perspective view of a heater according to an embodiment, FIG. 2 is a plan view of a heating module according to the embodiment, and FIG. 3 is an exploded perspective view of a heater core of the heating module according to the embodiment.

Referring to FIG. 1 , the heater according to the embodiment includes a case, a heating module, and a power module.

The case 100 may be disposed outside the heater 1000 . The case 100 may be an exterior member of the heater 1000 and may have a shape surrounding the heating module 200 accommodated in the case 100 . The power module 300 may be disposed on one side of the case 100 . The case 100 may be coupled to the power module 300 .

A lower portion of the case 100 may include a receiving unit coupled to the power module 300 . For example, the case 100 and the power module 300 may be coupled to each other through a pinch coupling. However, it is not limited to this method, and various coupling methods may be applied.

In addition, the case 100 may have a hollow block-shaped accommodating portion, but is not limited thereto. For example, the case 100 may include a first surface 110 and a second surface 120 . Here, the plurality of inlets may be disposed on the first surface 110 . Accordingly, the fluid may flow into the first surface 110 . Here, the fluid may be a medium for transferring heat, for example, air. However, it is not limited to this type.

In addition, the plurality of inlets may be arranged in a predetermined row on the first surface 110 . Lengths of the plurality of inlets in the first direction (X-axis direction) may vary, but are not limited thereto.

The plurality of outlets may be disposed on the second surface 120 . The fluid introduced through the first surface 110 is heated from the heat generating module inside the case 100 , and may move through the outlet of the second surface 120 . The outlet may also be arranged to match a predetermined row on the second surface. In addition, it may be arranged to correspond to the plurality of inlets. Accordingly, the fluid introduced through the inlet may be smoothly discharged through the outlet.

And the fluid (b ₁ ) flowing into the inlet may have a lower temperature than the fluid (b- _{2) discharged through the outlet.} In addition, the length of the plurality of outlets in the first direction (X-axis direction) may vary, but is not limited thereto.

The heating module 200 may be disposed inside the case 100 . The heating module 200 may be electrically connected to the power module 300 disposed on one side of the case 100 . The heat generating module 200 may provide heat by using the power provided from the power module 300 .

The power module 300 may be disposed on one side of the case 100 . For example, the power module 300 may be disposed under the case 100 to support the case 100 and the heating module 200 . The power module 300 may be coupled to the case 100 . The power module 300 may be electrically connected to the heat generating module 200 to provide power to the heat generating module 200 . One side of the power module 300 may be connected to an external power supply. Also, the mass air flow (MAF) of the heater 1000 according to the embodiment may be 300 kg/h, but may have various values according to the volume of the heater 1000 .

Referring to FIG. 2 , the heat generating module 200 according to the embodiment may include a plurality of heater cores 220 , heat dissipation fins 210 , a first gasket 230 - 1 , and a second gasket 230 - 2 . have.

The heater core 220 may be disposed inside the case 100 . The heater core 220 may receive power from the power module to generate heat. The heater core 220 may include a plurality of first and second heater cores.

_{The heater core 220 may have a length W 3} of 1 mm to 6 mm in the first direction (X-axis direction). However, the length is not limited thereto, and as the size of the heater increases, the length of the heater core 220 in the first direction (X-axis direction) may increase. Here, the first direction (X-axis direction) is a direction in which the heater core 220 and the heat dissipation fins 210 are alternately disposed. The second direction (Z-axis direction) is a direction perpendicular to the first direction (X-axis direction). It will be described below based on this.

The heater according to an embodiment of the present invention is the _{maximum length (W 1} ) in the first direction (X-axis direction) of the heater by reducing the _{length (W 3 ) of the heater core 220 in the first direction (X-axis direction)} can be reduced With this configuration, other heaters may be lighter in weight and include more heater cores 220 per same size to provide improved thermal efficiency.

_{In addition, the length W 3} in the first direction (X-axis direction) of the heater core 220 may be formed to be 1 mm or more and 5 mm or less, and more preferably 1.5 mm or more and 3 mm or less.

The plurality of heater cores 220 may be spaced apart from each other by a predetermined distance. In addition, heat dissipation fins 210 may be disposed between the plurality of heater cores 220 .

In addition, the heater core 220 and the heat dissipation fins 210 may be alternately disposed in the first direction (X-axis direction). That is, the heat generating module 200 may include the heat dissipation fins 210 and the heater core 220 alternately arranged in the first direction (X-axis direction). With this configuration, heat generated in the heater core 220 may be effectively transferred to the heat dissipation fins 210 .

_{The minimum length W 2} of the heat generating module 200 in the second direction (Z-axis direction) may be 160 mm to 200 mm. The heater core 220 and the heat dissipation fin 210 are connected to each other, so that heat generated in the heater core 220 may move to the heat dissipation fin 210 . Accordingly, the fluid passing through the heater core 220 and the heat dissipation fin 210 may receive heat to increase the temperature.

For heat transfer, a thermally conductive member (not shown) may be disposed between the heater core 220 and the heat dissipation fins 210 . The thermally conductive member (not shown) may include, but is not limited to, conductive silicon.

The heat dissipation fins 210 may be disposed inside the case 100 . The heat dissipation fins 210 may be disposed between the heater cores 220 and may be plural. The plurality of heat dissipation fins 210 may be spaced apart from each other in the first direction (X-axis direction).

The heat dissipation fin 210 may extend in the second direction (Z-axis direction) like the heater core 220 . In addition, the heat dissipation fin 210 may be a louver fin, but is not limited thereto. The heat dissipation fin 210 may have a form in which inclined plates are stacked in the second direction (Z-axis direction). Accordingly, the heat dissipation fin 210 may include a plurality of gaps through which the fluid may pass. And the fluid may receive heat while passing through the gap. Due to the heat dissipation fins 210 , the heat transfer area through which the heat generated in the heater core 220 is transferred to the fluid increases, so that heat transfer efficiency can be improved.

The heat dissipation fin 210 may be coupled to the heater core 220 by an adhesive member such as a silver adhesive layer 224 or aluminum (Al) brazing paste. However, it is not limited to this method.

An adhesive member (not shown) may be disposed between the heater core 220 and the heat radiation fin 210 to couple the heater core 220 and the heat radiation fin 210 to each other. The adhesive member (not shown) prevents the heater core 220 and the heating fin 210 from being detached at a high temperature generated when the heater is driven, thereby improving durability and reliability of the heater.

The length L of the heat dissipation fin 210 in the first direction (X-axis direction) may be 8 mm to 32 mm, but may be variously applied according to the size of the heater.

When the length L of the heat dissipation fin 210 in the first direction (X-axis direction) is less than 8 mm, there is a problem of reducing the MAF (mass air flow) of the heater, and the first direction (X) of the heat dissipation fin 210 is If the length (L) of the axial direction) is greater than 32 mm, heat transfer is not performed properly in the passing fluid, so there is a limit to lower the rate of temperature increase of the fluid.

_{In addition, the minimum length W 1} of the heat dissipation fin 210 in the first direction (X-axis direction) may be 180 mm to 220 mm.

A support part (not shown) may be disposed between the heat dissipation fins 210 . The support part (not shown) may be randomly disposed between the plurality of heat dissipation fins 210 , and for example, at least one support part (not shown) may be disposed between adjacent heater cores 220 .

The support part (not shown) supports the heater core 220 and the heat radiation fin 210 to prevent bending of the heater core 220 and the heat radiation fin 210 from an external force. A length of the support part (not shown) in the second direction (Z-axis direction) may be 0.4 mm to 0.6 mm. When the length of the support part (not shown) in the second direction (Z-axis direction) is less than 0.4 mm, there is a limit in that the amount of fluid discharged through the heater decreases. When the length of the support part (not shown) in the second direction (the Z-axis direction) is greater than 0.6 mm, there is a problem in that the void of the heat dissipation fin 210 decreases, so that heat transferred to the fluid decreases.

A support (not shown) may be disposed in the center of the adjacent heater cores 220 between the heater cores 220 . By such a configuration, the damage to the heater can be minimized by distributing the force from the external force in a balanced manner.

In addition, the support (not shown) is generated as the _{length (W 3} ) of the heater core 220 _{is reduced without changing the minimum length (W 2} ) of the heat generating module 200 in the second direction (Z-axis direction) may be equal to the length. That is, the support part (not shown) may be inserted into the heater while maintaining the length L of the heat dissipation fin 210 in the first direction (X-axis direction). With this configuration, when replacing a heater applied to an existing vehicle with a heater according to an embodiment of the present invention, the design (size, etc.) of the heater does not require change, so other components used in the manufacture of the existing heater can be easily manufactured and can be reused. For example, the heat dissipation fins of the conventional heater may be equally applied to the heater according to the embodiment. Accordingly, since the manufacturing process of the existing heater can be used, the heater according to the present embodiment does not change the existing manufacturing process and compatibility can be improved.

The first gasket 230-1 may be located on the left side of the case 100 in the second direction (Z-axis direction). The second gasket 230 - 2 may be located on the right side of the case 100 in the second direction (Z-axis direction). The first gasket 230 - 1 and the second gasket 230 - 2 may be coupled to the case 100 by pinching, bonding, or the like.

A plurality of accommodating portions spaced apart from each other in the second direction (Z-axis direction) may be disposed on the first gasket 230 - 1 and the second gasket 230 - 2 .

The first gasket 230 - 1 and the second gasket 230 - 2 may each include a plurality of protruding accommodating parts, and the plurality of accommodating parts may be electrically connected to the heater core 220 and mechanically coupled to each other. have. For example, the plurality of accommodating units may be coupled to each other in a one-to-one correspondence with the heater core.

The electrode part 225 may be electrically connected to the first gasket 230 - 1 and the second gasket 230 - 2 . The electrode part 225 may be disposed at lower ends of the first gasket 230 - 1 and the second gasket 230 - 2 .

The electrode part 225 may be formed of a plurality of electrode terminals. For example, the electrode unit 225 may be formed of two electrode terminals having different polarities.

Also, it may be electrically connected to the heater core 220 . Also, the electrode unit 225 may be electrically connected to the power module. Accordingly, the power of the power module may be provided to the heat generating module 200 .

Referring to FIG. 3 , the heater core 220 according to the embodiment includes a first substrate 221 , a first ceramic 221a , a second substrate 223 , a second ceramic 223a , a heating element 222 , and a connection part. (224a, 224b) may be included.

The first substrate 221 and the second substrate 223 may accommodate the heating element 222 therein.

In addition, the first substrate 221 may be disposed on one side of the heater core 220 in the first direction (X-axis direction), and the second substrate 223 may be disposed on the other side of the heater core 220 .

The first substrate 221 and the second substrate 223 may include a metal having high thermal conductivity. For example, the first substrate 221 and the second substrate 223 may include Al, Cu, Ag, Au, Mg, SUS, stainless steel, or the like. However, it is not limited to these materials.

The second substrate 223 may be separated into a plurality like the first substrate 221 , and both the first heater core 220 - 1 and the second heater core 220 - 2 connected in series as shown in FIG. 3 . can wrap The second substrate 223 surrounds the first heater core 220-1 and the second heater core 220-2 to increase the bonding force between the first heater core 220-1 and the second heater core 220-2. can be improved Thereby, durability of the heater core according to the embodiment can be improved.

The first ceramic 221a and the second ceramic 223a may be positioned to face each other with respect to the heating element 222 . The first ceramic 221a and the second ceramic 223a may be formed by anodizing, thermal spraying, screen printing, patterning, or the like.

The first ceramic 221a and the second ceramic 223a may include oxygen (O) in at least one of aluminum (Al), copper (Cu), silver (Ag), gold (Au), magnesium (Mg), and silicon (Si). ) and nitrogen (N) may be a ceramic containing at least one.

Also, the first ceramic 221a and the second ceramic 223a may have a length of 50 μm to 500 μm in the first direction (X-axis direction). Due to this configuration, the first and second ceramics 221a and 223a easily dissipate heat generated by the heating element 222 disposed between the first ceramic 221a and the second ceramic 223a, so heat dissipation is insufficient. Thus, it is possible to prevent a phenomenon such as cracks caused in the first ceramic 221a and the second ceramic 223a.

Also, the first ceramic 221a and the second ceramic 223a may be formed on the first substrate 221 by thermal spraying at a high temperature nozzle of about 10,000°C. At this time, since the temperature formed between the first ceramic 221a and the second ceramic 223a and the first substrate 221 is about 200°C, the first substrate 221 and the first ceramic 221a and the second ceramic Since the adhesion between the 223a is improved, it is possible to prevent the first ceramic 221a and the second ceramic 223a from being separated from the first substrate 221 when the heater is operated.

In addition, the same may be applied to the case of forming the second ceramic 223a through thermal spraying on the second substrate 223 as described above.

In addition, the coefficients of thermal expansion of the first and second substrates 221 and 223 may be determined according to preset conditions by reflecting the coefficients of thermal expansion of the first and second ceramics 221a and 223a. That is, the coefficients of thermal expansion of the first and second substrates 221 and 223 may have values similar to those of the first and second ceramics 221a and 223a.

Also, the coefficients of thermal expansion of the first and second substrates 221 and 223 may have the same values as those of the first and second ceramics 221a and 223a. As a result, the first and second ceramics 221a and 223a, which have good thermal conductivity but are brittle and easily damaged by thermal shock, can be reinforced.

The difference between the thermal expansion coefficients of the first substrate 221 and the second substrate 223 and the thermal expansion coefficients of the first and second ceramics 221a and 223a is the same including 0, or the ratio of the thermal expansion coefficients is 1:1 to 6 It may be in the range of :1. Preferably, a ratio of the coefficients of thermal expansion of the first and second substrates 221 and 223 to those of the first and second ceramics 221a and 223a may be in a range of 2:1 to 4:1. When the coefficient ratio of the coefficients of thermal expansion of the first substrate 221 and the second substrate 223 and the first and second ceramics 221a and 223a exceeds 6:1, the first and second ceramics 221a and 223a are formed. can be broken

In addition, the first substrate 221 and the second substrate 223 are formed to surround the heating element 222 , the first ceramic 221a and the second ceramic 223a, and the heating element 222 and the first ceramic 221a are formed to surround them. ) and the second ceramic 223a may be protected. In addition, since the first substrate 221 and the second substrate 223 use a material with high thermal conductivity such as aluminum (Al), heat generated from the heating element 22 can be easily conducted to the outside through the heat dissipation fin 210 . can

The heating element 222 may be disposed between the first substrate 221 and the second substrate 223 . For example, the heating element 222 may be disposed on one surface of the first substrate 221 by a method such as printing, patterning, thermal spraying, or deposition.

The heating element 222 may be disposed inside the heater core 220 . The heating element 222 may be disposed on the first substrate 221 by printing, patterning, deposition, or the like. The heating element 222 may be disposed on a surface of the first substrate 221 where the first substrate 221 and the second substrate 223 contact each other.

The heating element 222 may be a resistor line. The heating element 222 may be a resistor including nickel-chromium (Ni-Cr), molybdenum (Mo), tungsten (W), rubidium (Ru), silver (Ag), copper (Cu), or the like, but is limited thereto. it is not And the heating element 222 may generate heat when electricity flows.

The heating element 222 may be formed on the first ceramic 221a of the first substrate 221 through silk screen printing or thermal spraying.

As mentioned above, the heating element 222 may be formed on the first substrate 221 through thermal spraying at a high temperature nozzle of about 10,000°C. In addition, since the temperature formed between the first substrate 221 and the first ceramic 221a is about 200° C., the adhesion between the first substrate 221 and the first ceramic 221a is improved, so that when the heater is operated, the first substrate Separation of the first ceramic 221a from the 221 may be prevented.

The heating element 222 may extend in various directions on the first substrate 221 and may be turned up (curved or bent) in a portion of the first substrate 221 . For example, the heating element 222 may be repeatedly extended in the second direction (Z-axis direction) of the first substrate 221 . The heating element 222 may be stacked in the third direction (Y-axis direction) through which the fluid passes by repeating this extension. Here, the third direction (Y-axis direction) is a direction perpendicular to the first direction (X-axis direction) and the second direction (Z-axis direction).

With this configuration, the fluid may sequentially pass through a portion in which heat is generated in the heater core 220 while passing through the heat generating module 200 to receive heat. That is, the contact area between the fluid and the heat generated from the heater core 220 may be increased by the arrangement of the heating elements 222 .

In addition, in the case of a heater including a conventional ceramic, the area of the heating element compared to the area of the substrate was formed to be about 10%, so the thermal efficiency was low. Between the first and second substrates 221 and 223 , the area of the heating element 222 may vary. For example, it is possible to improve the thermal efficiency by securing the surface area of the heating element 222 to be 10% or more, 50% or more, or 70% or more compared to the surface area of the first substrate 221, and at the same time control the thermal efficiency of the heating module. there is also

Both ends of the heating element 222 may be electrically connected to any one of the first electrode terminal 225a and the second electrode terminal 225b, respectively.

The heating element 222 may receive power from the power module through the first electrode terminal 225a and the second electrode terminal 225b. The heating element 222 may convert electrical energy of the power module into thermal energy. For example, current may flow through the heating element 222 and generate heat. And the heating element 222 may be controlled to generate heat according to the control of the power provided by the power module.

In addition, heat diffusion plates (not shown) may be disposed on both sides of the heater core 220 . The heat diffusion plate may have a plurality of layer structures to facilitate heat diffusion. However, it is not limited to this structure. Also, a heat spreader (not shown) may be omitted.

The connection part 224 may include a first connection member 224a and a second connection member 224b. The first connection member 224a may be disposed on one end of the heating element 222 , and the second connection member 224b may be disposed on the other end of the heating element 222 .

The first connecting member 224a may be electrically connected to one end of the heating element 222 . Also, the second connecting member 224b may be electrically connected to the other end of the heating element 222 .

The first connecting member 224a may be positioned in a direction opposite to the second connecting member 224b with respect to the heating element 222 .

In addition, the first connecting member 224a and the second connecting member 224b may be symmetrically positioned with respect to the heating element 222 . This configuration will be described in detail below with reference to FIGS. 4 to 7 .

4 is a perspective view of a heater core according to the embodiment, and FIG. 5 is a view for explaining heat dissipation by region of the heater core according to the embodiment in FIG. 4 .

Referring to FIG. 4 , as described above, the heater core 220 may include a first heater core 220 - 1 and a second heater core 220 - 2 . However, the number is not limited thereto, and the heater core 220 may have a form in which n heater cores are connected in series.

The structure of the first heater core 220-1 and the second heater core 220-2 may be the same as described above. Hereinafter, the first heater core 220 - 1 will be mainly described.

In addition, the first connecting member 224a - 1 and the second connecting member 224b - 1 may be disposed in opposite directions with respect to the heating element 222 . The first connecting member 224a - 1 and the second connecting member 224b - 1 include a first substrate 221-1, a first ceramic 221a-1, a second ceramic 223a-1, and a second substrate. It may be disposed in a receiving groove formed at a position symmetrical in the second direction (Z-axis direction) with respect to the heating element at 223-1. The receiving groove may be formed by punching, but is not limited thereto.

In addition, the first connecting member 224a - 1 and the second connecting member 224b - 1 may have a shape protruding in the second direction (Z-axis direction). The first connecting member 224a - 1 and the second connecting member 224b - 1 may be electrically connected to the heating element in the same direction. Accordingly, the first heater core 220-1 and the second heater core 220-2 may be easily connected in series with each other. Accordingly, the first heater core 220-1 and the second heater core 220-2 can be easily electrically connected without wires or other components, so that the heater core according to the embodiment can provide improved design freedom. .

Also, in the first heater core 220-1, the first connection member 224a-1 and the second connection member 224b-1 may be symmetrically positioned with respect to the heating element 222-1.

Also, the heating element 222-1 may have a symmetrical shape in the second direction (Z-axis direction). The heating element 222 includes the first ceramic 221a-1 on the first substrate 221-1 and the second ceramic 223a-1 below the second substrate 223-1 in the first direction (X-axis direction). ) can be placed between

With this configuration, the heating element can provide even heat transfer to the first substrate 221-1 and the second substrate 223-1 through the first ceramic 221a-1 and the second ceramic 223a-1. have.

For example, when the first connecting member 224a - 1 and the second connecting member 224b - 1 are not located in opposite directions with respect to the heating element 222-1, compared to the area of the first ceramic 221a - 1 An area of the heating element 222-1 on the first ceramic 221a-1 may be uneven. For example, when the first connecting member 224a - 1 and the second connecting member 224b - 1 are positioned on one side of the first ceramic 221a - 1 , the first connecting member 224a - 1 and the second connecting member 224a - 1 Due to the area occupied by the member 224b-1, the heating element 222-1 may be concentratedly formed on the other side surface of the first ceramic 221a-1. For this reason, the first ceramic 221a - 1 has a high temperature on the other side and a low temperature on one side, so that heat dissipation may not be easy.

Alternatively, referring to FIG. 5 , the first connecting member 224a and the second connecting member 224b may be disposed on the first substrate 221 in opposite directions with respect to the heating element. With this configuration, the first region S1 may have the same heat distribution as that of the third region S3 from the heating element. Also, in the second area S2 positioned between the first area S1 and the third area S3 , since the connecting member is not disposed, heat concentration may occur.

Due to this configuration, the first region S1 and the second region S2 in which the first connecting member 224a and the second connecting member 224b are disposed have the same heat distribution, so the portion in which the connecting member is not disposed It is possible to prevent the phenomenon of excessive concentration of heat in the Accordingly, the heater core according to the embodiment may provide an even thermal distribution, and the difference between the maximum temperature and the minimum temperature may decrease, so that thermal shock dispersion may be improved. In addition, when the heater core according to the embodiment is attached to the heater to provide heat to the user, heat is evenly transferred to the fluid, thereby improving thermal efficiency.

Here, the first region S1 , the second region S2 , and the third region S3 are in the 2-1 direction (Z1-axis direction) or the 2-2 direction (Z2-axis direction) in the first substrate 221 . ) may be a region partitioned by a first line L1 and a second line L2 divided into thirds. Specifically, the first area S1 is an area disposed at the outermost portion in the 2-1 direction (Z1 direction), and the second area S2 and the third area S3 are formed in the first area S1. The region is sequentially arranged in the 2-2 direction (Z2-axis direction).

6 is a perspective view of a heater core according to another embodiment, and FIG. 7 is a view for explaining heat dissipation by area of the heater core according to another embodiment.

Referring to FIG. 6 , similarly to FIG. 5 , the heating element 222 may be disposed between the first ceramic 221a and the second ceramic 223a.

In the heater core according to another embodiment, the heating element 222 may have a different area ratio according to an area. And, as shown in FIG. 5 , the fourth region S4 , the fifth region S5 , and the sixth region S6 may be regions divided into thirds in the second direction (Z-axis direction) on the first substrate 221 . .

In addition, the heating element 222 may be divided into a first heating element 222a , a second heating element 222b , and a third heating element 222c disposed in the fourth to sixth regions S4 to S6 .

The first heating element 222a and the third heating element 222c may be formed more densely than the second heating element 222b in the second direction (Z-axis direction).

For example, the inner distance G1 of the first heating element 222a in the second direction (Z-axis direction) may be the same as the inner distance G3 of the third heating element 222c. In addition, the inner distance G1 of the first heating element 222a in the second direction (Z-axis direction) may be smaller than the inner distance G2 of the second heating element 222b.

The first heating element 222a, the second heating element 222b, and the third heating element 222c may form the same area on the first substrate 221 as that of the first substrate 221 .

Referring to FIG. 7 , since the configuration of the heating element is applied in FIG. 6 , the fourth region S4 may have the same heat distribution as the fifth region S5 and the sixth region S6 from the heating element 222 .

Accordingly, it is possible to prevent excessive concentration of heat in the fifth region S5, which is a region where the connecting members 224a and 224b are not disposed. Accordingly, the heater core according to another exemplary embodiment may provide an even thermal distribution, so that the difference between the maximum temperature and the minimum temperature may be reduced, and thus thermal shock dispersion may be improved. In addition, when the heater core according to another embodiment is attached to the heater to provide heat to the user, heat is evenly transferred to the fluid, thereby improving thermal efficiency.

8 is a diagram illustrating a connection state of a heater core, and FIGS. 9A to 9C are diagrams illustrating various connection states of the heater core.

Referring to FIG. 8 , the second connection member 224b-1 of the first heater core 220-1 and the first connection member (not shown) of the second heater core 220-2 may be coupled to each other. have. Various fastening methods may be applied to the connection between the first heater core 220-1 and the second heater core 220-2.

Referring to FIG. 9 , connecting members coupled to each other in adjacent heater cores are a first connecting member 224a-1 and a second connecting member 224b-2, respectively.

Referring to FIG. 9A , the first connecting member 224a - 1 may include a protrusion T1. The protrusion T1 may have various shapes, and may be illustratively cylindrical. The protrusion T1 is formed on the first connection member 224a - 1 and may protrude in various directions.

The second connecting member 224b - 2 may include a coupling hole h1 formed at a position corresponding to the protrusion T1 . The coupling hole h1 may be a through hole, but is not limited thereto. In addition, the coupling hole h1 may have various shapes according to the shape of the protrusion T1 .

Referring to FIG. 9B , the first connecting member 224a - 1 may include a protrusion T2. The protrusion T2 may have various shapes, and may be, for example, a rectangular parallelepiped. The protrusion T2 may be formed on the first connecting member 224a - 1 , and the protrusion T2 may be plural.

The second connecting member 224b - 2 may include a plurality of coupling holes h2 coupled to the protrusion T2 . The coupling hole h2 may be a through hole, and there may be a plurality of coupling holes h2. Accordingly, the protrusion T2 and the coupling hole h2 can be coupled at various positions, so that the area of the overlapping portion of the first connection member 224a-1 and the second connection member 224b-2 can be controlled. have. In addition, the distance between the first connecting member 224a-1 and the second connecting member 224b-2 may be adjusted, so that the distance between the first heater core and the second heater core may also be adjusted. Accordingly, the volume of the heater core is controlled, so that it can be manufactured in a small size.

Referring to FIG. 9C , the first connecting member 224a-1 and the second connecting member 224b-2 may have a plate shape. Also, the first connecting member 224a - 1 and the second connecting member 224b - 2 may have different magnetic poles. As a result, the first connecting member 224a-1 and the second connecting member 224b-2 can be easily connected without a manufacturing process for coupling the first connecting member 224a-1 and the second connecting member 224b-2. can be produced.

10 is a side view of a heater core according to an embodiment;

Referring to FIG. 10 , the heater core 220 includes a first substrate 221 , a first ceramic 221a , a heating element 222 , a second ceramic 223a , and a second substrate in a first direction (X-axis direction). 223 may be arranged in this order.

The first substrate 221 may include a first ceramic 221a. _{The first substrate 221 may have a length W 4} of 0.4 mm to 3 mm in the first direction (X-axis direction). Preferably, the length W ₄ of the first substrate 221 may be 1 mm to 3 mm. More preferably, the length W ₄ of the first substrate 221 may be 1.5 mm to 2.2 mm. Accordingly, the first substrate 221 prevents the warpage that occurs while the first ceramic 221a and the heating element 222 are formed on the first substrate 221 through thermal spraying, and the warpage that occurs at a high temperature when the heater is driven. phenomenon can also be prevented.

The first substrate 221 in the first direction (X-axis direction) when the length (W ₄ ) is less than 0.4 mm, the first ceramic 221a and the heating element 222 are formed at a high temperature through thermal spraying, the bending phenomenon occurs Limitations exist.

_{In addition, when the length W 4 of} the first substrate 221 in the first direction (X-axis direction) is greater than 3 mm, there is a limit in that heat transfer to the heat dissipation fin 210 is reduced, and the heat transfer of the heater core 220 is limited. As the thickness increases and the weight of the heater increases, there is a limit to weight reduction. In particular, when the heater is installed in the vehicle, there is a limit in that the weight of the vehicle increases.

_{The first ceramic 221a may have a length W 5} of 50 μm to 500 μm in the first direction (X-axis direction). Preferably, the length W ₅ of the first ceramic 221a may be 100 μm to 400 μm. More preferably, the length W ₅ of the first ceramic 221a may be 150 μm to 300 μm. The first ceramic 221a may be disposed on a side where the first substrate 221 contacts the heating element 222 .

_{When the length W 5 of} the first ceramic 221a in the first direction (X-axis direction) is less than 50 μm, there is a limit in which the withstand voltage characteristic decreases. _{When the length W 5 of} the first ceramic 221a in the first direction (X-axis direction) is greater than 500 μm, when the first ceramic 221a is formed through thermal spraying or when the heater operates at a high temperature 1 There is a limit in which cracks occur in the substrate 221 . In addition, heat from the heating element 222 is not efficiently transferred to the first substrate 221 , and the process time for forming the first ceramic 221a increases, thereby reducing efficiency in manufacturing the heater.

_{The heating element 222 may have a length W 6} of 10 μm to 100 μm in the first direction (X-axis direction). Preferably, the length (W ₆ ) of the heating element 222 may be 38 μm to 80 μm. More preferably, the length W ₆ of the heating element 222 may be 45 μm to 75 μm. For example, when the heating element 222 includes Ni-Cr, the length W ₆ in the first direction (X-axis direction) of the heating element 222 may be 50 μm to 60 μm, but it is limited to this length. no.

When the length (W ₆ ) of the heating element 222 is less than 10 μm, the heating element 222 has a limit in which the heating characteristic decreases. When the length (W ₆ ) of the heating element 222 is greater than 100 μm, the heating element 222 is difficult to be formed in a large area on the first ceramic 221a, and the current density increases, so that the heating characteristic may be deteriorated, and an electric short may occur. There are limitations that arise.

_{The second ceramic 223a may have a length W 8} of 50 μm to 500 μm in the first direction (X-axis direction). Preferably, the length (W ₈ ) of the second ceramic 223a may be 100 μm to 400 μm. More preferably, the length W ₈ of the second ceramic 223a may be 150 μm to 300 μm. The second ceramic 223a may be disposed on a side in contact with the heating element.

Second ceramic in a longitudinal first direction (X axis direction) to the length (W ₈₎ that the first direction (X axis direction) of not more than 50um poor withstand voltage characteristic, the second ceramic (223a) of (223a) (W ₈ ) is 500 μm or more, there is a limit in that cracks occur in the second substrate 223 when the second ceramic 223a is formed through thermal spraying or when the heater operates at a high temperature. In addition, heat from the heating element 222 is not efficiently transferred to the second substrate 223 , and the process time for forming the second ceramic 223a increases, thereby reducing efficiency in manufacturing the heater.

_{The second substrate 223 may have a length W 7} of 0.1 mm to 3 mm in the first direction (X-axis direction). Preferably, the length W ₇ of the second substrate 223 may be 0.2 mm to 2 mm. More preferably, the length W ₇ of the second substrate 223 may be 0.3 mm to 1.5 mm.

The second substrate 223 may have a smaller length or the same length in the first direction (X-axis direction) than the first substrate 221 . (Hereinafter, the thickness means a length in the first direction (X-axis direction)) When the thickness of the first substrate 221 is greater than the thickness of the second substrate 223 , the first ceramic is formed on the first substrate 221 . It is possible to prevent bending of the heater core 220 while forming the 221a , the heating element 222 , and the second ceramic 223a at a high temperature. That is, by making the thickness of the first substrate 221 greater than the thickness of the second substrate 223 , the bending of the heater core 220 can be easily prevented.

For example, a length ratio of the minimum length of the second substrate 223 to the minimum length of the first substrate 221 in the first direction (X-axis direction) may be 1:1.1 to 1:10. Preferably, the length ratio may be 1:1.8 to 1:8, more preferably 1:4 to 1:6. According to this configuration, the thickness of the second substrate 223 may be sufficient to accommodate the supporting force of the heat dissipation fin 210 when the heat dissipation fin 210 and the second substrate 223 are coupled.

When the ratio of the length of the minimum length of the second substrate 223 to the minimum length of the first substrate 221 in the first direction (X-axis direction) is less than 1:1.1, the first substrate ( 221), there is a limit that cannot cover the side. And when the ratio of the minimum length of the second substrate 223 to the minimum length of the first substrate 221 in the first direction (X-axis direction) is greater than 1:10, the volume of the heater core increases and the heating element 222 ) is not sufficiently transferred to the first substrate 221 , and there is a limit in which the first substrate 221 and the second substrate 223 are detached by force.

_{When the length W 7 of} the second substrate 223 in the first direction (X-axis direction) is less than 0.1 mm, when it is connected to the heat dissipation fin 210 , the supporting force for the heat dissipation fin 210 is low and the protection against external force is reduced. there is a limit to _{When the length W 7 of} the second substrate 223 in the first direction (X-axis direction) is greater than 3 mm, there is a limit in that heat transfer to the heat dissipation fins 210 is reduced.

With this configuration, the heating element 222 may be disposed between the first ceramic 221a and the second ceramic 223a and may be disposed to face each other with respect to the heating element 222 .

내지

일 수 있다. And the first ceramic 221a and the second ceramic 223a have a coefficient of thermal expansion.

inside

can be

In addition, as described above, the first ceramic 221a and the second ceramic 223a may be formed to face each other on one surface of the first substrate 221 and the second substrate 223 with the heating element 222 interposed therebetween. have.

The first ceramic 221a and the second ceramic 223a may surround the heating element 222 . Due to this configuration, even when the heating element 222 generates heat, the heating element 222 is separated from the first ceramic 221a and the second ceramic 223a in the first ceramic 221a and the second ceramic 223a disposed on both sides. can be prevented from being

내지

일 수 있다. 이와 달리, 제1 기판(221)과 제2 기판(223)이 알루미늄을 포함하는 경우 제1 기판(221)과 제2 기판(223)의 열팽창계수와 제1 세라믹(221a)과 제2 세라믹(223a)의 열팽창계수의 계수비는 3:1일 수 있다. The first ceramic 221a and the second ceramic 223a _{may be made of aluminum oxide (Al 2} O ₃ ). In this case, the first ceramic 221a and the second ceramic 223a have a coefficient of thermal expansion of 4.5.

inside

can be In contrast, when the first substrate 221 and the second substrate 223 include aluminum, the coefficients of thermal expansion of the first substrate 221 and the second substrate 223 and the first ceramic 221a and the second ceramic ( 223a) may have a coefficient ratio of the coefficient of thermal expansion of 3:1.

In addition, the heating element 222 and the first ceramic 221a may be formed between the first substrate 221 and the second substrate 223 , and the heating element 222 may be formed between the thickness of the first substrate 221 and the second substrate. When the thicknesses of 223 are different from each other, they may be positioned on one surface of the first substrate 221 having the maximum thickness. At this time, since the coefficient of thermal expansion of the one surface on which the heating element 222 is located of the first substrate 221 is different from the coefficient of thermal expansion of the first ceramic 221a, the first substrate 221 has the one surface or the other surface. can be bent towards

In the heater core 220 of the present invention, the heating element 222 may be positioned between the first ceramic 221a and the second ceramic 223a. For example, the first substrate 221 and the second substrate 223 are disposed symmetrically in the second direction (Z-axis direction) with respect to the heating element 222 to prevent bowing caused by a difference in thermal expansion coefficient. can

11A is a cross-sectional view of a heater core according to an embodiment, and FIGS. 11B to 11C are modifications of FIG. 11A .

Referring to FIG. 11A , the first substrate 221 may have a length W ₉ of 10 mm to 20 mm in the third direction (Y-axis direction). In addition, the second substrate 223 may have a length W ₁₀ of 11 mm to 23 mm in the third direction (Y-axis direction).

One of the first substrate 221 and the second substrate 223 may have a longer length in the third direction (Y-axis direction) than the other. For example, the length W ₉ of the first substrate 221 in the third direction (Y-axis direction) may be smaller than the _{length W 10 of the second substrate 223 in the third direction (Y-axis direction).} .

In addition, any one of the first substrate 221 and the second substrate 223 may include a protrusion formed to protrude in a direction facing the other substrate. For example, the protrusion 223b may be formed to protrude in the first direction (X-axis direction) from one surface of the second substrate 223 . The protrusion 223b may cover side surfaces of the first ceramic 221a and the second ceramic 223a. Here, the side surface may be any one of both surfaces that are maximally spaced apart in the third direction (Y-axis direction).

The protrusion 223b may protect the first substrate 221 , the first ceramic 221a , the heating element 222 , and the second ceramic 223b from the outside.

Also, the protrusion 223b may be supported by the frame 223c and protrude from one surface of the frame 223c in the first direction (X-axis direction). Also, the protrusion 223b may extend from the frame portion 223c of the second substrate 223 in the first direction (X-axis direction).

_{The protrusion 223b has a length W 11} in the first direction (X-axis direction) in the first direction (X-axis direction) of the first ceramic 221a, the heating element 222, and the second heating element 223b. W ₁₂ ) may be equal to or greater than that of W 12 ). The protrusion 223b may surround side surfaces of the first ceramic 221a and the second ceramic 223a.

The protrusion 223b may contact one surface of the first substrate 221 , through which the first substrate 221 and the second substrate 223 may be coupled, and physical stability of the heater core may be secured. have.

In addition, the bonding force between the first substrate 221 and the second substrate 223 may be improved, and the separation of the heating element 222 from the first and second substrates 221 and 223 due to heat may be prevented. . In addition, it is possible to protect the ceramic and the heating element 222 from moisture or external force.

In addition, as shown in FIG. 11B , the first ceramic 221a, the second ceramic 223a, and the heating element 222 may be formed on both sides of the first substrate 221 . In this case, the second substrate 223 may be the first It is disposed on both sides of the substrate, and the protrusion 223b of the second substrate 223 may protrude toward the first substrate 22 .

Referring to FIG. 11B , as shown in FIG. 11A , the length W _{9 of} the first substrate 221 in the third direction (Y-axis direction) may be 10 mm to 20 mm. In addition, the second substrate 223 may have a length W ₁₀ of 11 mm to 23 mm in the third direction (Y-axis direction).

As described with reference to FIG. 11A , one of the first substrate 221 and the second substrate 223 may include a protrusion formed to protrude in a direction facing the other substrate. For example, the protrusion 223b may be formed to protrude in the first direction (X-axis direction) from one surface of the second substrate 223 . The protrusion 223b may cover side surfaces of the first ceramic 221a and the second ceramic 223a. Here, the side surface may be any one of both surfaces that are maximally spaced apart in the third direction (Y-axis direction).

The protrusion 223b is formed by manufacturing the frame portion 223c and the protrusion 223b as one substrate when the second substrate 223 is manufactured, and then forming both ends of the second substrate 223 in the 33rd direction (Y-axis direction). It may be formed by bending in one direction (X-axis direction). Accordingly, the second substrate 223 including both the protrusion 223b and the frame 223c may be efficiently manufactured.

Also, the protrusions 223b positioned on both sides of the second substrate 223 may have the same _{length W 15 in the first direction (X-axis direction).} Preferably, the protrusions 223b on both sides may have a length ratio of 1:0.9 to 1:1.1 times each other due to a process error.

In addition, the protrusion 223b may remove a portion in which the first ceramic 221a and the second ceramic 223b of the first substrate 221 are exposed in the third direction (Y-axis direction). With this configuration, the first substrate 221 , the first ceramic 221a , and the second ceramic 223b form flat both sides in the third direction (Y-axis direction), and the first ceramic 221 from external impact. , it is possible to easily protect the second ceramic 223b.

In addition, the protrusion 223b has a length in the first direction (X-axis direction) that is greater than the lengths of the first ceramic 221a , the heating element 222 , and the second ceramic 223b , and includes the first ceramic 221a and the heating element. 222 may be smaller than the length of the second ceramic 223b and the first substrate 221 . With this configuration, the bonding force between the first substrate 221 and the second substrate 223 may be improved.

For example, the second substrate 223 may completely or partially cover the side surface of the first substrate 221 by the protrusion 223b. When the second substrate 223 covers the side surface of the first substrate 221 , the protrusion 223b of the second substrate 223 has an area of 30% to 100% of the area of the side surface of the first substrate 221 . The side surface of the first substrate 221 may be covered. The area ratio of the protrusion 223b covering the side surface of the first substrate 221 may be preferably 50% to 90%, more preferably 60% to 80%. In an embodiment, the length in the first direction (X-axis direction) in the region where the protrusion 223b contacts the first substrate 221 is 30 of the length in the first direction (X-axis direction) of the first substrate 221 . % to 100%. Preferably, it may be 50% to 90%, more preferably 60% to 80%.

When the length of the protrusion 223b in the first direction (X-axis direction) in the area in contact with the first substrate 221 is less than 50% of the length in the first direction (X-axis direction) of the first substrate 221 Since the bonding force between the first substrate 221 and the second substrate 223 is reduced, the first gipin 221 and the second substrate 223 may be physically separated from each other. In the region where the protrusion 223b contacts the first substrate 221 , the length in the first direction (X-axis direction) is 80% to 100% of the length in the first direction (X-axis direction) of the first substrate 221 . %, the length of the protrusion 223b may be controlled within a corresponding range in the manufacturing process in order to control thermal efficiency.

A first ceramic 221a , a heating element 222 , and a second ceramic 223a may be formed on the first substrate 221 . As described above, the heating element 222 may be disposed between the first ceramic 221a and the second ceramic 223a. The second ceramic 223a may be formed on the first ceramic 221a and the heating element 222 by a thermal spraying method.

For example, the second ceramic 223a may be formed on the first ceramic 221a instead of the second substrate 223 even though it is formed by thermal spraying at high temperature and high pressure. Since the second ceramic 223a is not in contact with the second substrate 223 , the influence of high temperature and high pressure applied during the formation of the second ceramic 223a on the second substrate 223 may be reduced. On the other hand, when the first ceramic 221a and the second ceramic 223a are formed on the first substrate 221 , the first substrate 221 is affected by high temperature, and thus, in order to prevent warping, The length can be increased in the (X-axis direction).

_{Accordingly, the minimum length W 14} in the first direction (X-axis direction) of the second substrate 223 according to the embodiment is the minimum length W in the first direction (X-axis direction) of the first substrate 221 . - ₁₃ ) may be smaller.

_{For example, the minimum length W 14} in the first direction (X-axis direction) of the second substrate 223 is It may be 0.1 mm to 3 mm. _{In addition, the minimum length W-13} in the first direction (X-axis direction) of the first substrate 221 may be 1 mm to 3 mm.

Also, a length ratio of the minimum length of the first substrate 221 to the minimum length of the second substrate 223 in the first direction (X-axis direction) may be 1:0.1 to 1:1. Preferably, the length ratio is 1:0.15 to 1:0.5, more preferably the length ratio is 1:0.2 to 1:0.4.

When the length ratio of the length of the first substrate 221 to the length of the second substrate 223 in the first direction (X-axis direction) is less than 1:0.1, the heat dissipation fin 210 attached to the second substrate 223 is supported. However, there is a limit in which the second ceramic 223a is influenced by an external force from the outside.

When the length ratio of the length of the first substrate 221 to the length of the second substrate 223 in the first direction (X-axis direction) is greater than 1:1, the bending of the first substrate 221 causes the heating element 222 to generate. There is a limit in that heat is not easily transferred to the first substrate 221 and the second substrate 223 .

According to this configuration, the second substrate 223 can be prevented from being bent due to expansion due to high temperature, and at the same time, the volume and weight of the heater core 220 can be reduced. In addition, it is possible to provide a reduction in manufacturing cost.

Referring to FIG. 11C , the cover part 226 may be disposed on the outer part of the heater core 220 . The cover part 226 may cover the first heater core and the second heater core connected in series.

The cover part 226 may surround the first substrate 221 and the second substrate 223 . And the cover part 226 may include a receiving hole.

The material of the cover part 226 may include aluminum (Al). The cover part 226 is an exterior member of the heater core 220 and may be in the form of a hollow bar or rod, but is not limited thereto.

The cover part 226 may accommodate the first substrate 221 and the second substrate 223 , the heating element 222 , and a heat diffusion plate (not shown) therein. In this case, the inner surface of the cover part 226 may be in contact with at least one of the first substrate 221 , the second substrate 223 , and a heat diffusion plate (not shown).

Thermally conductive silicon may be disposed between the cover part 226 , the first substrate 221 , the second substrate 223 , and a heat diffusion plate (not shown). The cover part 226 may be bonded to the first substrate 221 , the second substrate 223 , and a thermal diffusion plate (not shown) by thermally conductive silicon. In addition, the cover part 226 may be structurally fastened to the first substrate 221 , the second substrate 223 , and the heat diffusion plate (not shown), but is not limited thereto.

Since the cover 226 surrounds the first substrate 221 , the second substrate 223 , and the heat diffusion plate (not shown), the first substrate 221 , the second substrate 223 , and the heat diffusion plate (not shown) are enclosed. ) can be protected. With this configuration, the cover part may improve the reliability of the heater core 220 .

In addition, the cover part 226 has high thermal conductivity, so that heat generated from the heating element 222 of the first substrate 221 and the second substrate 223 may be conducted to the heat dissipation fin 210 in contact with the heater core 220 . .

Also, the cover part 226 may be electrically connected to the gasket described above. However, the cover part 226 may have various shapes by being changed according to a design request. For example, the second substrate 223 is designed to perform the same shape and function as the cover part 226 , and the cover part 226 may be removed.

12A to 12B are flowcharts illustrating a method of manufacturing a heater core according to an embodiment.

Referring to FIG. 12A , a first substrate 221 may be provided. In addition, a first ceramic 221a may be formed on the first substrate 221 . As described above, the first substrate 221 may include a metal having high conductivity. For example, the first substrate 221 and the second substrate 223 may include Al, Cu, Ag, Au, Mg, stainless steel, or the like. However, it is not limited to these materials.

The first ceramic 221a may be formed by coating an insulating layer such as aluminum oxide or magnesium oxide by anodizing or thermal spraying. The first ceramic 221a includes a material having insulation and thermal conductivity, and the material is not particularly limited.

For example, thermal spraying may be performed through welding in a state in which the first substrate 221 is molten, but is not particularly limited thereto. Also, the first ceramic 221a may be integrally coupled to the first substrate 221 , and a portion of the first substrate 221 may be oxidized.

In addition, as mentioned above, the first ceramic 221a can easily conduct heat and have a lower coefficient of thermal expansion than that of the substrate, so that warpage of the substrate can be prevented.

A heating element 222 may be disposed on the first ceramic 221a. The heating element 222 may be formed on the first ceramic 221a through coating, printing, or thermal spraying. The heating element 222 includes nickel-chromium (Ni-Cr), tungsten (W), molybdenum (Mo), nickel (Ni), chromium (Cr), copper (Cu), rubidium (Ru), silver (Ag), and ITO. (Indium Tin Oxide) and barium titanate (BaTiO), CNT, graphite, may include any one of carbon black.

And as described above, the second ceramic 223b may be formed on the first ceramic 22a and the heating element 222 by thermal spraying.

Referring to FIG. 12B , the first connecting member 224a and the second connecting member 224b may be formed at positions corresponding to the grooves formed in the second substrate 223 . The first connecting member 224a and the second connecting member 224b may be formed in opposite directions with respect to the heating element 222 to each other. In addition, the first connecting member 224a and the second connecting member 224b are electrically connected to the heating element, and the first connecting member 224a and the second connecting member 224b are connected to the heating element by brazing as described above. can be combined.

The first substrate 221 , the first ceramic 221a , the heating element 222 , the second ceramic 223a , and the second substrate 223 may be coupled to each other.

In addition, the second substrate 223 disposed on the heating element 222 , the first ceramic 221a , and the second ceramic 223a may be provided.

As described above, the second substrate 223 may include a protrusion. In addition, an adhesive layer (not shown) may be disposed between the second substrate 223 and the second ceramic 223a to bond the second substrate 223 and the first substrate 221 .

The adhesive layer (not shown) may be made of glass, and may provide a bonding function through heat treatment at 500°C to 600°C. In addition, the adhesive layer (not shown) may improve durability by blocking an insulating function and moisture.

Additionally, the combined first substrate 221 and the second substrate 223 may be covered with a cover part. In addition, the first substrate 221 and the second substrate 223 may be combined with the heat dissipation fins using silver epoxy, silicone resin, or the like. In addition, the first substrate 221 and the second substrate 223 may be coupled to the heat dissipation fins by a brazing method, and the coupling method is not particularly limited.

13A is a perspective view of a heater core including a sensor unit, and FIG. 13B is a view illustrating the effect of FIG. 13A.

Referring to FIG. 13A , the sensor unit 227 may be electrically connected to the heating element in the heater core. For example, in the first heater core 220-1 and the second heater core 220-2, heating elements 222-1 and 222-2 are disposed therein, and between the heating elements 222-1 and 222-2 At least one sensor unit 227 may be disposed.

The sensor unit 227 may be an element having a positive temperature coefficient. For example, the sensor unit 227 may be a PTC device.

For example, the sensor unit 227 may be disposed between the heating elements 222 to electrically connect adjacent heating elements to each other. And the sensor unit 227 may control the on/off of the electrical connection between the heating elements. For example, the sensor unit 227 may have a high resistance due to a sudden increase in resistance at a high temperature. In this case, the connection between the heating elements adjacent to the sensor unit 227 may be electrically cut off. For example, the sensor unit 227 may change to a high-temperature insulator when the Curie temperature is reached. That is, the sensor unit 227 may block the electrical flow of the connection unit at a predetermined temperature.

Referring to FIG. 13B , when the sensor unit 227 is not present (b), the temperature of the heater core continuously increases over time, but when the sensor unit 227 is present (a), the heater core is can be maintained at a constant temperature.

The sensor unit 227 may _{include, but is not limited to, BaTiO 3} and may be made of various materials having a positive temperature coefficient. For example, _{Pb may be added to BaTiO 3} Heat generation may be improved by adding Pb. However, PB may be omitted. The sensor unit 227 may control the Curie temperature in various ways by adjusting the dopant. In addition, since the sensor unit 227 becomes a fixed term at a desired temperature, it may be designed to block a current at a predetermined temperature. Accordingly, the heater core according to the embodiment may act as an intrinsically safe heating element due to the sensor unit 227 . In addition, the sensor unit 227 may act as an active type of switching rather than a passive type connected to a direct circuit element or the like. Accordingly, in the heater core according to the embodiment, the possibility of occurrence of a fire may be reduced, and thus stability may be improved.

In addition, the sensor unit 227 may be disposed in various positions, and a plurality of sensor units 227 may be disposed in the heater core to further improve stability.

14 is a conceptual diagram illustrating a heating system according to an embodiment.

Referring to FIG. 14 , the heating system 2000 of this embodiment may be used in various moving means. Here, the means of transportation is not limited to vehicles running on land, such as automobiles, and may include ships, airplanes, and the like. However, in the following, a case in which the heating system 2000 of the present embodiment is used in a vehicle will be described as an example.

The heating system 2000 may be accommodated in an engine room of a vehicle. The heating system 2000 may include an air supply unit 400 , a flow path 500 , an exhaust unit 600 , and a heater 1000 .

Various air supply devices such as a blower fan and a pump may be used as the air supply unit 400 . The air supply unit 400 moves the fluid from the outside of the heating system 2000 to the inside of the flow path 500 to be described later, and may move along the flow path 500 .

The flow path 500 may be a passage through which a fluid flows. The air supply unit 400 may be disposed on one side of the flow path 500 , and the exhaust unit 600 may be disposed on the other side of the flow path 500 . The flow path 500 may air-conditionally connect the engine room and the interior of the vehicle.

A blade that can be opened and closed may be used as the exhaust unit 600 . The exhaust unit 600 may be disposed on the other side of the flow path 500 . The exhaust unit 600 may communicate with the interior of the vehicle. Accordingly, the fluid moving along the flow path 500 may be introduced into the interior of the vehicle through the exhaust unit 600 .

As the heater 1000 of the heating system 2000, the heater 1000 of the present embodiment described above may be used. Hereinafter, a description of the same technical idea will be omitted. The heater 1000 may be disposed in the form of a partition wall in the middle of the flow path 500 . In this case, the front and rear of the heater 1000 may be in the same or similar direction to the front and rear of the vehicle. The cold fluid in the engine room supplied to the flow path 500 through the air supply unit 400 is heated while passing through the heater 1000 from the front to the rear, and then flows again along the flow path 500 through the exhaust unit 600 . It can be supplied indoors.

Additionally, unlike the conventional PCT thermistor, the heater 1000 of the present embodiment may conduct heat by a heating element disposed between the first ceramic and the second ceramic. In addition, it is possible to increase the thermal efficiency by using the high calorific value of the heating element. In addition, it is possible to achieve thermal stability and improve thermal efficiency and reliability by covering the high calorific value of the heating element with the first and second ceramics having a high heat transfer rate.

Furthermore, the heater 1000 of this embodiment is free from heavy metal materials such as lead (Pb), so it is environmentally friendly and may be lightweight.

Although the embodiment has been described above, it is only an example and does not limit the present invention, and those of ordinary skill in the art to which the present invention pertains are not exemplified above in a range that does not depart from the essential characteristics of the present embodiment. It will be appreciated that various modifications and applications are possible. For example, each component specifically shown in the embodiment can be implemented by modification. And differences related to such modifications and applications should be construed as being included in the scope of the present invention defined in the appended claims.

Claims (11)

a plurality of first substrates;
first ceramics respectively disposed on the plurality of first substrates;
a heating element disposed on the first ceramic;
a second ceramic disposed on the heating element; and
Including connecting portions disposed at both ends of the heating element,
The connection part,
a first connecting member disposed at one end of the heating element; and
a second connecting member disposed at the other end of the heating element;
The first connection member is positioned in a direction opposite to the second connection member with respect to the heating element, and is connected to a second connection member disposed on an adjacent first substrate;
The first substrate includes a first region, a second region, and a third region sequentially partitioned in a direction from the first connecting member toward the second connecting member,
The heating element includes a first heating element disposed on the first region, a second heating element disposed on the second region, and a third heating element disposed on the third region,
The interval between the first heating element and the third heating element is smaller than the interval between the second heating element and the heater core.
According to claim 1,
A heater core disposed on the second ceramic and further comprising a second substrate surrounding the plurality of first substrates, the first ceramic, the heating element, and the second ceramic.
3. The method of claim 2,
The second substrate is
and a protrusion extending in the thickness direction of the heater core,
A length of the protrusion in a thickness direction of the heater core is greater than lengths of the first ceramic, the heating element, and the second ceramic.
4. The method of claim 3,
The protrusion is a heater core in contact with at least one side surface of the first substrate.
4. The method of claim 3,
A heater core in which the protrusions do not overlap the connection parts in a connection direction of the plurality of first substrates.
According to claim 1,
Further comprising a hollow cover,
The plurality of first substrates, the first ceramic, the heating element, and the second ceramic are disposed in the hollow heater core.
7. The method of claim 6,
The heater core does not overlap the cover part with the connection part in a connection direction of the plurality of first substrates.
According to claim 1,
The heater core further comprising at least one sensor unit disposed between the heating elements and having a positive temperature coefficient.
9. The method of claim 8,
The sensor part is a heater core that blocks the electrical flow of the connection part at a predetermined temperature.
power module; and
Including; a heating module that is electrically connected to the power module to generate heat;
The heating module is
A plurality of heat dissipation fins and a plurality of heater cores are alternately arranged,
The heater core is
a plurality of first substrates;
first ceramics respectively disposed on the plurality of first substrates;
a heating element disposed on the first ceramic;
a second ceramic disposed on the heating element; and
Including connecting portions disposed at both ends of the heating element,
The connection part,
a first connecting member disposed at one end of the heating element; and
a second connecting member disposed at the other end of the heating element;
The first connection member is positioned in a direction opposite to the second connection member with respect to the heating element, and is connected to a second connection member disposed on an adjacent first substrate;
The first substrate includes a first region, a second region, and a third region sequentially partitioned in a direction from the first connecting member toward the second connecting member,
The heating element includes a first heating element disposed on the first region, a second heating element disposed on the second region, and a third heating element disposed on the third region,
A distance between the first heating element and the third heating element is smaller than a distance between the second heating element and the heater.
flow path through which air travels;
an air supply unit for introducing air;
an exhaust unit for discharging air into the interior of the moving means; and
and a heater disposed between the air supply part and the exhaust part in the flow path to heat the air,
The heater is
power module; and
Including; a heating module that is electrically connected to the power module to generate heat;
The heating module is
A plurality of heat dissipation fins and a plurality of heater cores are alternately arranged,
The heater core is
a plurality of first substrates;
first ceramics respectively disposed on the plurality of first substrates;
a heating element disposed on the first ceramic;
a second ceramic disposed on the heating element; and
Including connecting portions disposed at both ends of the heating element,
The connection part,
a first connecting member disposed at one end of the heating element; and
a second connecting member disposed at the other end of the heating element;
The first connection member is positioned in a direction opposite to the second connection member with respect to the heating element, and is connected to a second connection member disposed on an adjacent first substrate;
The first substrate includes a first region, a second region, and a third region sequentially partitioned in a direction from the first connecting member toward the second connecting member,
The heating element includes a first heating element disposed on the first region, a second heating element disposed on the second region, and a third heating element disposed on the third region,
The interval between the first heating element and the third heating element is smaller than the interval between the second heating element and the heating system.

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