阅读说明：本技术 一种加热芯体及电加热器 (Heating core and electric heater ) 是由 赵寒 李炜 张雨晴 李映月 于 2019-10-28 设计创作，主要内容包括：本发明涉及加热器技术领域,具体而言,涉及一种加热芯体及电加热器。一种加热芯体,加热芯体包括芯体、第一集流管、压板以及管体。第一集流管与芯体连接,第一集流管包括内腔以及与内腔连通的安装孔。压板包括贯穿压板的通孔,沿通孔的轴线方向,通孔的两端分别设置有第一连接部及第二连接部。第一连接部与安装孔配合,第二连接部与管体配合,以使得内腔、通孔及管体依次导通形成流道。其能够优化加热芯体的组装工艺性,并提高加热芯体的密封性。(The invention relates to the technical field of heaters, in particular to a heating core and an electric heater. A heating core comprises a core body, a first collecting pipe, a pressing plate and a pipe body. The first collecting pipe is connected with the core body and comprises an inner cavity and a mounting hole communicated with the inner cavity. The clamp plate includes the through-hole that runs through the clamp plate, along the axis direction of through-hole, and the both ends of through-hole are provided with first connecting portion and second connecting portion respectively. The first connecting portion is matched with the mounting hole, and the second connecting portion is matched with the tube body, so that the inner cavity, the through hole and the tube body are sequentially communicated to form a flow channel. The assembly manufacturability of the heating core can be optimized, and the sealing performance of the heating core is improved.)

1. A heating core, comprising:

the heating core body comprises a core body, a first collecting pipe, a pressing plate and a pipe body;

the first collecting pipe is connected with the core body and comprises an inner cavity and a mounting hole communicated with the inner cavity;

the pressing plate comprises a through hole penetrating through the pressing plate, and a first connecting part and a second connecting part are respectively arranged at two ends of the through hole along the axis direction of the through hole;

the first connecting portion is matched with the mounting hole, and the second connecting portion is matched with the tube body, so that the inner cavity, the through hole and the tube body are sequentially communicated to form a flow channel.

2. A heated core as claimed in claim 1 wherein:

the first connecting part comprises a boss protruding outwards from the pressing plate along the axial direction of the through hole, the boss extends into the through hole, and the outer wall of the boss is matched with the inner wall of the mounting hole;

the second connecting portion include around first ring channel and the second ring channel that the axis of through-hole set up, the internal diameter of first ring channel is less than the internal diameter of second ring channel, and first ring channel reaches the second ring channel forms the ladder groove jointly.

3. A heated core as claimed in claim 2, wherein:

one end of the pipe body, which is matched with the second connecting part, is provided with a first subsection and a second subsection;

the first subsection extends into the through hole and is attached to the inner wall of the through hole, and the second subsection is abutted against the second annular groove so as to jointly limit an accommodating cavity through the first annular groove, the first subsection and the second subsection.

4. A heated core as claimed in claim 3 wherein:

the mounting hole is connected with the first connecting part in a welding mode;

the second connecting portion is connected with the pipe body in a welding mode, and the accommodating cavity is used for accommodating a welding ring.

5. A heating core as claimed in any one of claims 1 to 4, wherein:

the heating core body comprises two pressing plates and two pipe bodies, the first collecting pipe is provided with two mounting holes, the two mounting holes are respectively connected with the two pressing plates in a one-to-one correspondence manner, and the pressing plates are connected with the pipe bodies in a one-to-one correspondence manner to form two flow passages;

the heating core body further comprises an isolation structure, and the isolation structure is used for separating the inner cavity into two sub-cavities, so that the two flow channels respectively correspond to one sub-cavity.

6. A heated core as claimed in claim 5 wherein:

the isolation structure comprises a partition plate and a connecting hole arranged on the first collecting pipe, wherein the connecting hole is positioned on one side of the first collecting pipe, provided with the mounting holes, and is oppositely positioned between the two mounting holes;

the partition plate extends into the first collecting pipe from the connecting hole and is matched with the connecting hole so as to divide the inner cavity into two sub cavities.

7. A heated core as claimed in claim 6 wherein:

the core body comprises a plurality of flat pipes which are sequentially arranged at intervals, and one ends of the flat pipes extend into the first collecting pipe and are communicated with the inner cavity;

one side of the partition board close to the flat tubes is provided with a plurality of grooves, and the grooves are matched with the flat tubes in the first collecting tubes in a one-to-one correspondence mode.

8. A heated core as claimed in claim 7 wherein:

the core further comprises a plurality of PTC heating elements and a positioning assembly;

at least one PTC heating element is arranged between two adjacent flat tubes;

the positioning assembly comprises a first fixing clip, and the first fixing clip is used for limiting the interval between the PTC heating element and the first collecting pipe, which are positioned between two adjacent flat pipes.

9. A heated core as claimed in claim 8 wherein:

the core body also comprises a second collecting pipe arranged at one end of the core body far away from the first collecting pipe; the second collecting pipe comprises an inner cavity and flat pipe grooves connected with the flat pipes, and the other ends of the flat pipes extend into the flat pipe grooves of the second collecting pipe and are communicated with the inner cavity;

the positioning assembly further comprises a second fixing clip, and the second fixing clip is used for limiting the interval between the PTC heating element and the second collecting pipe, which are located between two adjacent flat pipes.

10. An electric heater, characterized by:

the electric heater comprising a heating core according to any one of claims 1 to 9.

Technical Field

The invention relates to the technical field of heaters, in particular to a heating core and an electric heater.

Background

In the prior art, the core pipeline of the electric heater has the problems of complex assembly process and poor sealing property.

Disclosure of Invention

The invention aims to provide a heating core body and an electric heater, which optimize the assembly manufacturability of the heating core body and improve the sealing property of the heating core body.

Embodiments of the invention may be implemented as follows:

the embodiment of the invention provides a heating core body, which comprises a core body, a first collecting pipe, a pressing plate and a pipe body;

the first collecting pipe is connected with the core body and comprises an inner cavity and a mounting hole communicated with the inner cavity;

the pressing plate comprises a through hole penetrating through the pressing plate, and a first connecting part and a second connecting part are respectively arranged at two ends of the through hole along the axis direction of the through hole;

the first connecting portion is matched with the mounting hole, and the second connecting portion is matched with the tube body, so that the inner cavity, the through hole and the tube body are sequentially communicated to form a flow channel.

In an alternative embodiment, the first connecting part comprises a boss protruding outwards from the pressure plate along the axial direction of the through hole, the boss extends into the through hole, and the outer wall of the boss is matched with the inner wall of the mounting hole;

the second connecting portion includes first ring channel and the second ring channel that sets up around the axis of through-hole, and the internal diameter of first ring channel is less than the internal diameter of second ring channel to first ring channel and second ring channel form the ladder groove jointly.

In an alternative embodiment, the end of the pipe body matched with the second connecting part is provided with a first subsection and a second subsection;

the first subsection stretches into the through hole and is attached to the inner wall of the through hole, and the second subsection abuts against the second annular groove to jointly limit the accommodating cavity through the first annular groove, the first subsection and the second subsection.

In an alternative embodiment, the mounting hole is connected with the first connecting part in a welding mode;

welded connection between second connecting portion and the body to it is used for holding the welding ring to hold the chamber.

In an alternative embodiment, the heating core comprises two pressing plates and two pipe bodies, the first collecting pipe is provided with two mounting holes, the two mounting holes are respectively connected with the two pressing plates in a one-to-one correspondence manner, and the pressing plates are connected with the pipe bodies in a one-to-one correspondence manner to form two flow passages;

the heating core body further comprises an isolation structure, and the isolation structure is used for dividing the inner cavity into two sub cavities, so that the two flow channels respectively correspond to one sub cavity.

In an optional embodiment, the isolation structure includes a partition plate and a connection hole disposed on the first header, the connection hole is located on one side of the first header where the mounting hole is disposed, and is located between two mounting holes relatively;

the baffle plate extends into the first collecting pipe through the connecting hole and is matched with the connecting hole to divide the inner cavity into two sub-cavities.

In an optional embodiment, the core body comprises a plurality of flat pipes which are sequentially arranged at intervals, and one ends of the flat pipes extend into the first collecting pipe and are communicated with the inner cavity;

one side of the partition board close to the flat pipes is provided with a plurality of grooves, and the grooves are matched with the flat pipes in the first collecting pipes in a one-to-one correspondence mode.

In an alternative embodiment, the core further comprises a plurality of PTC heating elements and a positioning assembly;

at least one PTC heating element is arranged between two adjacent flat tubes;

the positioning assembly comprises a first fixing clamp which is used for limiting the interval between the PTC heating element and the first collecting pipe, wherein the PTC heating element is positioned between two adjacent flat pipes.

In an alternative embodiment, the core further includes a second header disposed at an end of the core remote from the first header; the second collecting pipe comprises an inner cavity and flat pipe grooves connected with the flat pipes, and the other ends of the flat pipes extend into the flat pipe grooves of the second collecting pipe and are communicated with the inner cavity;

the positioning assembly further includes a second retaining clip for defining a space between the PTC heating elements and the second manifold between two adjacent flat tubes.

The embodiment of the invention provides an electric heater, which comprises the heating core body.

The embodiment of the invention has the beneficial effects that:

the heating core comprises a core body, a first collecting pipe, a pressing plate and a pipe body; the pressing plate comprises a through hole penetrating through the pressing plate, and a first connecting part and a second connecting part are respectively arranged at two ends of the through hole along the axial direction of the through hole; from this, through cooperating first connecting portion with the mounting hole that sets up on first pressure manifold to and cooperate second connecting portion and body, alright fix a position the installation between body, clamp plate and the first pressure manifold, such connected mode can effectively improve the efficiency of installation simultaneously, and can improve between the junction of body and clamp plate, and the leakproofness between the junction of clamp plate and first pressure manifold.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments will be briefly described below, it should be understood that the following drawings only illustrate some embodiments of the present invention and therefore should not be considered as limiting the scope, and for those skilled in the art, other related drawings can be obtained from the drawings without inventive effort.

FIG. 1 is an exploded view of a heating core according to an embodiment of the present invention;

FIG. 2 is a cross-sectional view of a heating core in an embodiment of the present invention;

fig. 3 is a schematic structural diagram of a first header according to an embodiment of the present invention;

FIG. 4 is a schematic structural view of a tube according to an embodiment of the present invention;

FIG. 5 is a schematic structural diagram of a platen according to an embodiment of the present invention;

FIG. 6 is a schematic view of a portion of FIG. 1 at VI;

FIG. 7 is a schematic view of a portion of FIG. 2 at VII;

FIG. 8 is a schematic view of a portion of FIG. 2 at VIII;

FIG. 9 is a schematic view of the installation of a partition in an embodiment of the present invention;

FIG. 10 is a schematic view of a portion of FIG. 3 at X;

fig. 11 is a schematic structural view of a flat tube in the embodiment of the present invention;

FIG. 12 is a partial schematic view at XII in FIG. 11;

FIG. 13 is a schematic structural view of a core in an embodiment of the invention;

FIG. 14 is a schematic view of the first mounting clip of the embodiment of the present invention;

FIG. 15 is a schematic view of the second mounting clip of the present invention;

FIG. 16 is a schematic structural diagram of a first fixing clip according to an embodiment of the present invention;

fig. 17 is a schematic structural diagram of a second fixing clip in the embodiment of the present invention.

Icon: 100-heating the core; 110-a core; 120-a first header; 130-a platen; 140-a tube body; 150-an isolation structure; 111-flat tubes; 112-a PTC heating element; 113-a positioning assembly; 114-a first fixed card; 115-second header; 116-a second fixed card; 117-microchannels; 118-a boss; 1191-a positioning section; 1192-a clamping portion; 121-lumen; 122-mounting holes; 131-a through hole; 132-a first connection; 133-a second connecting portion; 134-boss; 135-a first annular groove; 136-a second annular groove; 141-first division; 142-a second subsection; 143-a containment chamber; 144-a weld ring; 151-a separator; 152-connection hole; 153-groove.

Detailed Description

In order to make the objects, 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 with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all embodiments of the present invention. The components of embodiments of the present invention generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the figures, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. All other embodiments, which can be obtained by a person skilled in the art without inventive step based on the embodiments of the present invention, are within the scope of protection of the present invention.

It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined and explained in subsequent figures.

In the description of the present invention, it should be noted that if the terms "upper", "lower", "inside", "outside", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings or orientations or positional relationships conventionally placed when the products of the present invention are used, the orientations or positional relationships are only used for convenience in describing the present invention and simplifying the description, but the terms do not indicate or imply that the devices or elements referred to must have specific orientations, be constructed in specific orientations, and be operated, and thus, the present invention should not be construed as being limited.

Furthermore, the appearances of the terms "first," "second," and the like, if any, are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance.

It should be noted that the features of the embodiments of the present invention may be combined with each other without conflict.

Referring to fig. 1 to 6, fig. 1 to 2 show the structure of a heating core in an embodiment of the present invention, fig. 3 shows the structure of a first header in an embodiment of the present invention, fig. 4 shows the structure of a tube body in an embodiment of the present invention, and fig. 5 and 6 show the structure of a pressure plate in an embodiment of the present invention.

The present embodiment provides a heating core 100 comprising a core 110, a first manifold 120, a platen 130, and a tube 140.

Referring to fig. 3, the first header 120 is connected to the core 110, and the first header 120 includes an inner cavity 121 and a mounting hole 122 communicated with the inner cavity 121.

Referring to fig. 5, the pressing plate 130 has a through hole 131 penetrating the pressing plate 130, and a first connecting portion 132 and a second connecting portion 133 are respectively disposed at two ends of the through hole 131 along a penetrating direction of the through hole 131.

The first connecting portion 132 is matched with the mounting hole 122, and the second connecting portion 133 is matched with the tube 140, so that the inner cavity 121, the through hole 131 and the tube 140 are sequentially communicated to form a flow channel.

The working principle of the heating core 100 is as follows:

the heating core 100 includes a core 110, a first manifold 120, a platen 130, and a tube 140. The first header 120 is connected to the core 110, and the first header 120 includes an inner cavity 121 and a mounting hole 122 communicating with the inner cavity 121; the pressing plate 130 includes a through hole 131 penetrating the pressing plate 130, and a first connecting portion 132 and a second connecting portion 133 are respectively disposed at two ends of the through hole 131 along an axial direction of the through hole 131.

Through matching the first connecting portion 132 with the mounting hole 122 formed in the first header 120 and matching the second connecting portion 133 with the pipe body 140, the pressing plate 130 and the first header 120 can be positioned and mounted, and meanwhile, the connecting manner can effectively improve the mounting efficiency and improve the sealing performance between the connecting portions of the pipe body 140 and the pressing plate 130 and between the connecting portions of the pressing plate 130 and the first header 120.

Referring to fig. 7 and 8, fig. 7 and 8 show a connection manner of the tube and the pressing plate according to an embodiment of the present invention.

Further, in the present embodiment, when the first connection portion 132 is provided, the first connection portion 132 may include a boss 134 protruding outward of the pressure plate 130 in the axial direction of the through hole 131, and the boss 134 is an annular protrusion provided around the axial direction of the through hole 131. The boss 134 extends into the through hole 131, and the outer wall of the boss 134 is in clearance fit with the inner wall of the mounting hole 122, when the boss 134 is matched with the mounting hole 122, the boss 134 is firstly made to protrude out of the wall surface of the inner cavity 121, then the boss 134 is reamed and fixed on the first collecting pipe 120 by using a reamer, and then the connection sealing is realized through brazing (wherein the first collecting pipe 120 is a high-frequency welded pipe, and the outer wall of the first collecting pipe has a composite layer).

In addition, when the second connection part 133 is provided, the second connection part 133 may include a first annular groove 135 and a second annular groove 136 provided around an axis of the through hole 131, an inner diameter of the first annular groove 135 is smaller than an inner diameter of the second annular groove 136, and the first annular groove 135 and the second annular groove 136 together form a stepped groove.

Meanwhile, in order to be easily engaged with the second connecting portion 133, a first sub-portion 141 and a second sub-portion 142 are provided at an end of the tube 140 engaged with the second connecting portion 133; wherein the first subsection 141 extends into the through hole 131, the first subsection 141 is in clearance fit with the inner wall of the through hole 131, and the first subsection 141 protrudes out of the through hole 131. In addition, the tubular body 140 is fixed by reaming with a cylindrical reaming device. The second portion 142 abuts the second annular groove 136 to define a receiving cavity 143 by the first annular groove 135, the first portion 141 and the second portion 142.

When the first and second portions 141 and 142 are provided, in order to allow the first portion 141 to be attached to the inner wall of the through hole 131 and the second portion 142 to be abutted and attached to the second annular groove 136, it is necessary to make the outer diameter of the first portion 141 smaller than the outer diameter of the second portion 142, and therefore, when the first and second portions 141 and 142 are formed, a closing structure may be provided at the end of the tube 140 so that the diameter of the first portion 141 is smaller than the second portion 142.

Furthermore, in order to ensure the stability of the installation, after the positioning and matching of the above structures are completed, the connection can be performed by welding such as brazing, so as to improve the stability and the sealing performance of the connection, and the installation hole 122 and the first connection portion 132 are connected, and the second connection portion 133 and the tube body 140 are connected. And to facilitate welding the tube 140 to the pressure plate 130 and improve the sealing performance at the connection between the tube 140 and the pressure plate 130, the receiving cavity 143 can be used to receive the welding ring 144.

Further, in the present embodiment, the heating core 100 includes two pressing plates 130 and two tube bodies 140, the first collecting pipe 120 is provided with two mounting holes 122, the two mounting holes 122 are respectively connected to the two pressing plates 130 in a one-to-one correspondence, and the pressing plates 130 are connected to the tube bodies 140 in a one-to-one correspondence, so as to form two flow passages; therefore, with such an embodiment, two flow channels are located on the same side of the core 110, and two pipes are communicated with the same first collecting pipe 120, so that the structure of the heating core 100 can be optimized, and the area of the core 110 between the two flow channels exposed to the outside is reduced.

Referring to fig. 9 and 10, fig. 9 and 10 show an arrangement manner of an isolation structure in an embodiment of the invention.

Based on the heating core 100, in the present embodiment, the heating core 100 may further include an isolation structure 150, where the isolation structure 150 is configured to divide the inner cavity 121 into two sub-cavities, so that each of the two flow channels corresponds to one sub-cavity; therefore, the inner cavity 121 of the first collecting pipe 120 is divided into two sub-cavities by the isolation structure 150, and the two flow passages respectively correspond to one sub-cavity, so that the two flow passages can operate independently while sharing one first collecting pipe 120, thereby reducing the structural quantity of the heating core body 100 and facilitating assembly.

When the isolation structure 150 is provided, in this embodiment, the isolation structure 150 may include a partition 151 and a connection hole 152 provided on the first header 120; the connecting hole 152 is located at one side of the first header 120 where the mounting holes 122 are located, and is located between two mounting holes 122, so as to ensure that the pressing plate 130 connected to the two mounting holes 122 is located at the same side of the core 110; the partition 151 extends into the first header 120 through the connection hole 152, and cooperates with the connection hole 152 to divide the inner cavity 121 into two sub-cavities. It should be noted that, in order to separate the inner cavity 121 into two sub-cavities after the partition plate 151 extends into the inner cavity 121 through the connecting hole 152, when the partition plate 151 is disposed, the partition plate 151 needs to be adapted to the cross-sectional profile of the inner cavity 121, that is, the outer profile of the partition plate 151 is adapted to the cross-sectional profile of the inner cavity 121, so that the partition plate 151 can be attached to the inner wall of the inner cavity 121 after extending into the inner cavity 121, and the inner cavity 121 can be separated into two sub-cavities; in addition, in order to facilitate the installation of the partition 151, when the partition 151 is installed, the fitting portion between the partition 151 and the coupling hole 152 has a positioning, engaging, and sealing structure, so that the installation stability of the partition 151 and the sealing property of the coupling portion are improved. Meanwhile, the portion where the partition 151 is engaged with the connection hole 152 has a shape corresponding to the outer peripheral contour of the first header 120, so that the entire appearance can be improved after the partition 151 is engaged with the connection hole 152.

Further, in this embodiment, the core body 110 includes a plurality of flat tubes 111 arranged at intervals in sequence, and a plurality of flat tube grooves are arranged on corresponding side surfaces of the first collecting pipe 120, and the flat tube grooves and the flat tubes 111 are arranged in a one-to-one correspondence manner, so that one ends of the flat tubes 111 extend into the first collecting pipe 120 from the flat tube grooves and are communicated with the inner cavity 121; therefore, after the flat tubes 111 extend into the inner cavity 121, the inner cavity 121 is divided by the partition 151, so that when the partition 151 is disposed, a plurality of grooves 153 are formed in one side of the partition 151 close to the flat tubes 111, and the grooves 153 are matched with the flat tubes 111 in the first header 120 in a one-to-one correspondence manner. Therefore, the groove 153 is matched with the flat pipe 111 extending into the inner cavity 121, so that the partition plate 151 can be continuously attached to the wall of the inner cavity 121, and the inner cavity 121 is divided into two sub-cavities.

Referring to fig. 11 and 12, fig. 11 and 12 show the structure of the flat tube in the embodiment of the present invention.

In order to improve the heat exchange performance of flat tube 111 when flat tube 111 is disposed, a plurality of protrusions 118 are disposed in microchannel 117 of flat tube 111 to increase the heat exchange area.

Referring to fig. 13-17, fig. 12-17 show the structure of a positioning assembly in an embodiment of the invention.

The core 110 further includes a plurality of PTC heating elements 112 and a positioning assembly 113; a plurality of PTC heating elements 112 are arranged between flat tubes 111 arranged at intervals, and at least one PTC heating element 112 is arranged between two adjacent flat tubes 111; in the present embodiment, the number of PTC heating elements 112 between two adjacent flat tubes 111 is the same.

Thus, to reduce the overall mass of the positioning assembly 113, the positioning assembly 113 may be made of plastic, while the remaining structures, such as the first manifold 120, the platen 130, and the tube 140, may be made of aluminum. Positioning assembly 113 may include a first fixing clip 114, and first fixing clip 114 may be used to define a space between PTC heating element 112 and first collecting pipe 120, which are located between two adjacent flat tubes 111.

In addition, the core body 110 further comprises a second collecting pipe 115 arranged at one end, far away from the first collecting pipe 120, of the core body 110, the connection mode of the second collecting pipe 115 and the flat pipe 111 is the same as that of the first collecting pipe 120 and the flat pipe 111, so that the second collecting pipe 115 also comprises an inner cavity 121 and a plurality of flat pipe grooves for enabling the flat pipes to extend into the inner cavity 121, one end of each flat pipe 111 extends into the second collecting pipe 115 through the flat pipe grooves, and is communicated with the inner cavity 121.

Positioning assembly 113 further includes a second retaining clip 116, and second retaining clip 116 is used to define the spacing between PTC heating elements 112 and second header 115 between two adjacent flattened tubes 111.

Therefore, when the positioning unit 113 is disposed, in order to position the relative position of the PTC heating elements 112 provided between the two adjacent flat tubes 111, it is necessary to position the relative position of the PTC heating elements 112 between the second header 115 and the first header 120. Therefore, when the first fixing clip 114 and the second fixing clip 116 are configured, the first fixing clip 114 and the second fixing clip 116 can be configured with corresponding structures according to actual requirements.

When the first fixing clip 114 and the second fixing clip 116 are provided, the first fixing clip 114 includes at least one clip portion 1192 extending between two adjacent flat tubes 111 and located between the PTC heating element 112 and the first header 120, so as to define the interval between the PTC heating element 112 and the first header 120 on the side close to the first header 120; similarly, to position the rest of the PTC heating elements 112, when the second fixing clip 116 is configured, the second fixing clip 116 includes a plurality of clip portions 1192 for extending between two adjacent flat tubes 111 and located between the PTC heating elements 112 and the second header 115.

In the present embodiment, when the first fixing clip 114 and the second fixing clip 116 are disposed, in order to define the position of the PTC heating element 112, especially the relative position of the PTC heating element 112 between the first collecting pipe 120 and the second collecting pipe 115, the first fixing clip 114 includes a positioning portion 1191 and two clipping portions 1192 oppositely disposed at two ends of the positioning portion 1191; and a plurality of clamping portions 1192 are sequentially arranged on the positioning portion 1191 of the second fixing clip 116 at intervals, so that any two adjacent flat tubes 111 correspond to one clamping portion 1192 of the second fixing clip 116.

In other embodiments of the present invention, when the first fixing clip 114 and the second fixing clip 116 are disposed, in order to define the position of the PTC heating element 112, especially the relative position of the PTC heating element 112 between any two adjacent flat tubes 111 between the first header 120 and the second header 115, the first fixing clip 114 and the second fixing clip 116 each include a plurality of clamping portions 1192 connected to the positioning portions 1191, so that the clamping portions 1192 are disposed at two sides of the PTC heating element 112 between any two adjacent flat tubes 111, that is, at two sides close to the first header 120 and the second header 115.

In summary, when the core 110 is disposed, the core 110 includes a plurality of flat tubes 111 sequentially arranged at intervals, and a plurality of PTC heating elements 112 disposed between two adjacent flat tubes 111, and in order to ensure the contact between the PTC heating elements 112 and the flat tubes 111 and the heat conduction efficiency of the core 110, heat conductive silicone is disposed between the surfaces of the PTC heating elements 112 contacting the flat tubes 111.

Based on the above-mentioned heating core 100, the embodiment of the invention provides an electric heater, which includes the above-mentioned heating core 100.

The above description is only an embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.