Heating core and electric heater

Abstract

The invention relates to the technical field of electric heaters, in particular to a heating core and an electric heater. The heating core body comprises a runner assembly and a plurality of heating assemblies; the runner assembly comprises a plurality of heat transfer runners which are arranged in a stacked mode. Each heating assembly is arranged between the adjacent heat transfer runners; the heating assembly comprises a heating unit and at least one connecting mechanism; in the thickness direction of the heating unit, the heating unit covers the heat transfer runner through a connecting mechanism; the connecting mechanism comprises a conductive layer, an insulating layer and two adhesive layers; in the thickness direction of the heating unit, the heating unit, the conductive layer and the insulating layer are sequentially arranged in a stacked mode, one adhesive layer is bonded between the insulating layer and the conductive layer, and the other adhesive layer enables the side, away from the conductive layer, of the insulating layer to be bonded to the heat transfer runner. The adhesive layer is configured to have thermal conductivity. Therefore, the contact thermal resistance between the heating assembly and the heat transfer runner is smaller, and heat transfer is better.

Description

Technical Field

[0001] The present invention relates to the technical field of electric heaters, and in particular to a heating core and an electric heater. Background Art

[0002] As the earth's resources are gradually decreasing, electric vehicles as new energy sources are being vigorously promoted compared to traditional fuel vehicles, so the PTC heaters required by electric vehicles are also progressing faster and faster. Traditional cars use the coolant of the car engine as the heat source for the car air conditioning warm air, while ordinary electric vehicles can only use wind-heated PTC heaters as the heat source for their warm air. However, pure wind-heated PTC heating has certain risks.

[0003] The working principle of the existing water-heated PTC heater is that the heat of the PTC component or PTC heating sheet is transferred to the coolant through the heat transfer channel. The coolant is carried and flowed through the heat exchanger core, and the heat is transferred to the required place through the medium.

[0004] However, as thermal management systems place higher demands on the thermal conductivity of electric heaters, the thermal conductivity of PTC heaters in the prior art cannot meet the requirements. Summary of the invention

[0005] The objects of the present invention include, for example, providing a heating core and an electric heater, wherein the contact thermal resistance between the heating component and the heat transfer channel is smaller and the heat transfer is better.

[0006] The embodiments of the present invention can be implemented as follows:

[0007] In a first aspect, the present invention provides a heating core, comprising:

[0008] a flow channel assembly and a plurality of heating assemblies;

[0009] The flow channel assembly includes a plurality of stacked heat transfer flow channels; each of the heating components is disposed between adjacent heat transfer flow channels;

[0010] The heating assembly includes a heating unit and at least one connecting mechanism; along the thickness direction of the heating unit, the heating unit is covered on the heat transfer channel through the connecting mechanism;

[0011] The connecting mechanism includes a conductive layer and an insulating unit, and the insulating unit includes an insulating layer and two adhesive layers; along the thickness direction of the heating unit, the heating unit, the conductive layer and the insulating layer are stacked in sequence, and one adhesive layer is bonded between the insulating layer and the conductive layer, and the other adhesive layer bonds the side of the insulating layer away from the conductive layer to the heat transfer channel; the adhesive layer is configured to have thermal conductivity.

[0012] In an optional embodiment, the heat transfer channel is a flat tube, adjacent flat tubes are enclosed to form a clamping space, and the heating component is arranged in the clamping space.

[0013] In an optional embodiment, the insulating layer is a thin film.

[0014] In an optional embodiment, the heating unit is a PTC element.

[0015] In an optional embodiment, in the heating assembly, when the number of the connecting mechanisms is two, the two connecting mechanisms are arranged on both sides of the thickness of the heating unit.

[0016] In an optional embodiment, in the heating assembly, the two connecting mechanisms have the same thickness.

[0017] In an optional embodiment, in the insulating unit, the thickness of each adhesive layer is kept consistent along the length direction of the insulating layer.

[0018] In an optional embodiment, along the length direction of the heating assembly, the length of the connecting mechanism is greater than the length of the heating unit.

[0019] In an optional embodiment, the adhesive layer is bonded to the conductive layer or the heat transfer channel by high-temperature curing.

[0020] In a second aspect, the present invention provides an electric heater, comprising the heating core according to any one of the aforementioned embodiments.

[0021] The beneficial effects of the embodiments of the present invention include, for example:

[0022] Such a heating core includes a flow channel component and a plurality of heating components. The heating component is arranged between the stacked heat transfer channels to transport the heat generated by the heating component through the heat transfer channels. In order to ensure a better heat conduction effect between the heating component and the heat transfer channel, the heating component of the present scheme includes a heating unit and at least one connecting mechanism, wherein the heating unit is used to generate heat, and the connecting mechanism can directly transfer the heat generated by the heating unit to the heat transfer channel through an adhesive layer. Specifically, the surface of the heating unit is covered with a conductive layer, and the side of the conductive layer away from the heating unit is bonded to the insulating layer through an adhesive layer, and the side of the insulating layer away from the conductive layer is bonded to the heat transfer channel through another adhesive layer. That is, the heating component and the heat transfer channel are bonded together with the adhesive on the insulating layer. In this way, the conductive layer, the insulating layer, the heating unit, and the heat transfer channel are connected by bonding, and at the same time, this bonding method has a higher heat transfer efficiency. In summary, the components of the heating core of the present solution do not require other parts to fix them, the assembly process is simple, the number of parts is small, the contact thermal resistance between the heating component and the heat transfer channel is smaller, and the heat transfer is better. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments are briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without creative work.

[0024] Figure 1 It is a structural schematic diagram of a heating core according to an embodiment of the present invention;

[0025] Figure 2 A schematic structural diagram of a heating core from another perspective of an embodiment of the present invention;

[0026] Figure 3 is a schematic cross-sectional structural diagram of a heating core according to an embodiment of the present invention;

[0027] Figure 4 It is a schematic diagram of a partially enlarged structure of a heating core according to an embodiment of the present invention.

[0028] Icons: 10 - heating core; 100 - flow channel assembly; 110 - heat transfer flow channel; 111 - clamping space; 200 - heating assembly; 210 - heating unit; 220 - connecting mechanism; 221 - conductive layer; 222 - insulating layer; 223 - adhesive layer. DETAILED DESCRIPTION

[0029] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings here can be arranged and designed in various different configurations.

[0030] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, further definition and explanation thereof is not required in subsequent drawings.

[0032] In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. appear to indicate an orientation or position relationship, they are based on the orientation or position relationship shown in the accompanying drawings, or are the orientation or position relationship in which the product of the invention is usually placed when used. They are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In addition, the terms “first”, “second”, etc., if used, are merely used to distinguish between the descriptions and should not be understood as indicating or implying relative importance.

[0034] It should be noted that, in the absence of conflict, the features in the embodiments of the present invention may be combined with each other.

[0035] Please refer to Figure 1 , this embodiment provides a heating core 10, including a flow channel component 100 and a plurality of heating components 200;

[0036] The flow channel assembly 100 includes a plurality of stacked heat transfer flow channels 110; each heating assembly 200 is disposed between adjacent heat transfer flow channels 110;

[0037] The heating assembly 200 includes a heating unit 210 and at least one connecting mechanism 220; along the thickness direction of the heating unit 210, the heating unit 210 is covered on the heat transfer channel 110 through the connecting mechanism 220;

[0038] The connecting mechanism 220 includes a conductive layer 221 and an insulating unit, and the insulating unit includes an insulating layer 222 and two adhesive layers 223; along the thickness direction of the heating unit 210, the heating unit 210, the conductive layer 221 and the insulating layer 222 are stacked in sequence, and one adhesive layer 223 is bonded between the insulating layer 222 and the conductive layer 221, and the other adhesive layer 223 bonds the side of the insulating layer 222 away from the conductive layer 221 to the heat transfer channel 110; the adhesive layer 223 is configured to have thermal conductivity. That is, the insulating unit is arranged between the conductive layer and the heat transfer channel by bonding.

[0039] The heating component 200 of the present solution is arranged between the stacked heat transfer channels 110 to transport the heat generated by the heating component 200 through the heat transfer channels 110. Specifically, the surface of the heating unit 210 is covered with a conductive layer 221, and the side of the conductive layer 221 away from the heating unit 210 is bonded to the insulating layer 222 through an adhesive layer 223, and the side of the insulating layer 222 away from the conductive layer 221 is bonded to the heat transfer channel 110 through another adhesive layer 223. That is, the heating component 200 and the heat transfer channel 110 are bonded and fixed together by the adhesive on the insulating layer 222. In this way, the conductive layer 221, the insulating layer 222, the heating unit 210, and the heat transfer channel 110 are connected by bonding, and at the same time, this bonding method has a higher heat transfer efficiency. In summary, no other parts are required to fix the components of the heating core 10, the assembly process is simple, the number of parts is small, the contact thermal resistance between the heating component 200 and the heat transfer channel 110 is smaller, and the heat transfer is better.

[0040] Please continue reading Figure 1 , Figure 2 , Figure 3 and Figure 4 , to understand more structural details of the heating core 10. In an optional embodiment, the heat transfer channel 110 is a flat tube, and adjacent flat tubes are enclosed to form a clamping space 111, and the heating component 200 is arranged in the clamping space 111. It is not difficult to understand that in other embodiments, the heat transfer channel 110 is also a heat transfer structure, which is only an example and not limited here.

[0041] Further, in an optional embodiment, the insulating layer 222 is a film. The film has good insulation and good structural strength to ensure the stability of the heating core 10. Optionally, the film can be made of a material such as polyimide.

[0042] In an optional embodiment, the heating unit 210 is a PTC element. The PTC element is a PTC heating element, specifically a ceramic heating element, which has the advantages of low thermal resistance and high heat exchange efficiency, and is an automatic constant temperature and power-saving electric heater.

[0043] from Figure 3 and Figure 4 It can be seen that in an optional embodiment, in the heating assembly 200, when the number of the connecting mechanisms 220 is two, the two connecting mechanisms 220 are arranged on both sides of the thickness of the heating unit 210. That is, both sides of the heating unit 210 are bonded to the outer wall of the heat transfer channel 110 through the adhesive layer 223 on the insulating layer 222.

[0044] In an optional embodiment, in the heating assembly 200, the two connecting mechanisms 220 have the same thickness, so as to ensure that the heat of the heating unit 210 can be evenly transferred to the two adjacent heat transfer channels 110, thereby ensuring the uniformity and stability of the heat of the entire heating core 10.

[0045] In an optional embodiment, in the insulating unit, the thickness of each adhesive layer 223 is kept consistent along the length direction of the insulating layer 222. This can ensure the tightness of the internal connection of the heating component 200 and the tightness of the connection between the heating component 200 and the heat transfer channel 110.

[0046] In an optional embodiment, along the length direction of the heating assembly 200 , the length of the connecting mechanism 220 is greater than the length of the heating unit 210 , thereby ensuring that the heat of the heating unit 210 can be transferred to the heat transfer channel 110 to the greatest extent.

[0047] In an optional embodiment, the adhesive layer 223 is bonded to the conductive layer 221 or the heat transfer channel 110 by high temperature curing. Furthermore, after the heating component 200 is placed between the channels, pre-pressure is applied, and then high temperature curing is performed to tightly bond the PTC heating unit 210 and the channels together.

[0048] Optionally, the adhesive layer 223 is a silicone material. Specifically, before the heating core 10 is manufactured, the adhesive is in a semi-cured state and has a slight viscosity, and can be pre-attached to the conductive layer 221 and the heat transfer channel 110. After pressure is applied, the silicone material deforms and flows, and can fill the air gap at the contact interface to form a good bonding interface, and then achieves a strong bonding effect through high-temperature curing, thereby manufacturing and molding the heating core 10.

[0049] In a second aspect, the present invention provides an electric heater, comprising the heating core 10 according to any one of the aforementioned embodiments.

[0050] In summary, the embodiment of the present invention provides a heating core 10 and an electric heater, which have at least the following advantages:

[0051] The beneficial effects of the embodiments of the present invention include, for example:

[0052] The heating unit 210 and the heat transfer channel 110 are bonded together by the adhesive on the insulating layer 222. That is, the insulating layer 222 has double-sided adhesiveness, and the conductive layer 221 and the heat transfer channel 110 are bonded together, so that the heat of the heating unit 210 can be well conducted to the heat transfer channel 110.

[0053] The heating component 200 does not need to be fixed by other parts, the assembly process is simple, the number of parts is small, the contact thermal resistance between the heating component 200 and the heat transfer channel 110 is smaller, and the heat transfer is better.

[0054] The above are only specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. A heating core, characterized in that: include: A flow channel assembly (100) and a plurality of heating assemblies (200); The flow channel assembly (100) comprises a plurality of heat transfer flow channels (110) arranged in a stacked manner; each heating assembly (200) is arranged between adjacent heat transfer flow channels (110); The heating component (200) comprises a heating unit (210) and at least one connecting mechanism (220); along the thickness direction of the heating unit (210), the heating unit (210) is covered on the heat transfer channel (110) through the connecting mechanism (220); The connecting mechanism (220) comprises a conductive layer (221) and an insulating unit, wherein the insulating unit comprises an insulating layer (222) and two adhesive layers (223); along the thickness direction of the heating unit (210), the heating unit (210), the conductive layer (221) and the insulating layer (222) are sequentially stacked, and one of the adhesive layers (223) is bonded between the insulating layer (222) and the conductive layer (221), and the other adhesive layer (223) bonds a side of the insulating layer (222) away from the conductive layer (221) to the heat transfer channel (110); and the adhesive layer (223) is configured to have thermal conductivity.

2. The heating core according to claim 1, characterized in that: The heat transfer channel (110) is a flat tube, adjacent flat tubes are enclosed to form a clamping space (111), and the heating component (200) is arranged in the clamping space (111).

3. The heating core according to claim 1, characterized in that: The insulating layer (222) is a thin film.

4. The heating core according to claim 1, characterized in that: The heating unit (210) is a PTC element.

5. The heating core according to claim 1, characterized in that: In the heating assembly (200), when the number of the connecting mechanisms (220) is two, the two connecting mechanisms (220) are arranged on both sides of the thickness of the heating unit (210).

6. The heating core according to claim 5, characterized in that: In the heating assembly (200), the two connecting mechanisms (220) have the same thickness.

7. The heating core according to claim 1, characterized in that: In the insulating unit, along the length direction of the insulating layer (222), the thickness of each adhesive layer (223) remains consistent.

8. The heating core according to claim 1, characterized in that: Along the length direction of the heating component (200), the length of the connecting mechanism (220) is greater than the length of the heating unit (210).

9. The heating core according to claim 1, characterized in that: The adhesive layer (223) is bonded to the conductive layer (221) or the heat transfer channel (110) through high-temperature curing.

10. An electric heater, characterized in that: The electric heater comprises the heating core according to any one of claims 1-9.

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