Aluminum tube and PTC heater

Abstract

The utility model provides an aluminum tube, including an aluminum tube body for encapsulating a PTC heating core, the aluminum tube body including two first side walls for installing a heat sink, the two first side walls are arranged opposite to each other, the aluminum tube body also includes two second side walls opposite to each other, the first side wall and the second side wall both extend along the length direction of the aluminum tube body, along the length direction of the aluminum tube body, both ends of the aluminum tube body are provided with openings for the PTC heating core to extend into, the second side wall is recessed toward the inner side of the aluminum tube body, a pressing handle is provided on the outer surface of the second side wall, the pressing handle is connected to the outer surface of the second side wall through a first arc surface, the outer surface of the second side wall is provided with a second arc surface at the end close to the first side wall, the second arc surface is recessed toward the inner side of the aluminum tube body, the pressing handle, the first arc surface, and the second arc surface all extend along the length direction of the aluminum tube body. The utility model also provides a PTC heater.

Description

Technical Field

[0001] The utility model relates to the field of PTC heater manufacturing, in particular to an aluminum tube and a PTC heater. Background Art

[0002] The aluminum tube structure used in the existing PTC heater requires external force to be applied to the aluminum tube heat dissipation surface, and the PTC heating core is fixed inside the aluminum tube through the shrinkage of the heat dissipation surface, and then the heat sink is assembled on the aluminum tube heat dissipation surface. The heat sink cannot be assembled to the aluminum tube heat dissipation surface in advance, because if the heat sink is assembled on the aluminum tube heat dissipation surface in advance, the heat sink has poor compressive strength, and external force cannot be applied in the direction of the aluminum tube heat dissipation surface; however, this method of first installing the PTC heating core into the aluminum tube and then assembling the heat sink to the aluminum tube heat dissipation surface, because the PTC heating core cannot withstand high temperatures, the assembly of the aluminum tube and the heat sink can only be achieved by gluing, which will cause the assembly process of the PTC heater to take longer. At the same time, due to the use of glue, the PTC heater will have an odor. In addition, because the reliability of the glue is not enough, during long-term use, there will be a certain degree of looseness between the heat sink and the aluminum tube, and the deterioration of the heat dissipation effect will cause the power of the PTC heating core to decrease. Therefore, it is necessary to design a new aluminum tube structure to overcome the above problems. Utility Model Content

[0003] The purpose of the utility model is to overcome the defects of the prior art and provide an aluminum tube and a PTC heater. The utility model at least solves some of the problems in the prior art.

[0004] The utility model is achieved in this way:

[0005] The utility model provides an aluminum tube, comprising an aluminum tube body for encapsulating a PTC heating core, the aluminum tube body being a rectangular tube, the aluminum tube body comprising two first side walls for arranging a heat sink, the two first side walls being arranged opposite to each other, the aluminum tube body further comprising two second side walls opposite to each other, the first side wall and the second side wall both extending along the length direction of the aluminum tube body, openings for the PTC heating core to extend into are arranged at both ends of the aluminum tube body along the length direction of the aluminum tube body, the second side wall is recessed toward the inner side of the aluminum tube body, a pressing handle is arranged on the outer surface of the second side wall, the pressing handle is connected to the outer surface of the second side wall through a first arc surface, a second arc surface is arranged at an end of the outer surface of the second side wall close to the first side wall, the second arc surface is recessed toward the inner side of the aluminum tube body, the pressing handle, the first arc surface and the second arc surface all extend along the length direction of the aluminum tube body.

[0006] Further, the width of the first side wall is greater than the width of the second side wall.

[0007] Furthermore, the inner surface of the second side wall is a curved surface.

[0008] Furthermore, along the width direction of the second side wall, the pressing handle is arranged at a middle position of the second side wall.

[0009] Furthermore, the pressing handle includes a first part close to the aluminum tube body and a second part away from the aluminum tube body, the first part is connected to the outer surface of the second side wall through a first arc surface, perpendicular to the length direction of the aluminum tube body, the cross-section of the second part is rectangular, and the cross-section of the first part is trapezoidal, and the short side of the trapezoid is set close to the aluminum tube body.

[0010] The utility model also provides a PTC heater, comprising a plurality of heat sinks, a plurality of PTC heating cores, and the plurality of aluminum tubes mentioned above, wherein an aluminum tube body is provided between two adjacent heat sinks, the PTC heating cores are encapsulated in the aluminum tube body, and the PTC heating cores correspond to the aluminum tube bodies one by one.

[0011] Furthermore, the heat sink is connected to the first side wall of the aluminum tube body by welding.

[0012] The utility model has the following beneficial effects:

[0013] In the utility model, the heat dissipation surface (first side wall) of the aluminum tube and the heat sink can be assembled together in advance, and then the PTC heating core can be inserted into the aluminum tube. The external force is applied to the second side wall of the aluminum tube body by pressing the handle, so that the second side wall moves toward the inner side of the aluminum tube body, thereby driving the first side wall of the aluminum tube body to press the PTC heating core. In the utility model, the first side wall and the heat sink can be connected by brazing, which has good connection firmness and good heat transfer effect, avoiding the problem of power reduction of the PTC heating core due to poor heat dissipation effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 A cross-sectional view of an aluminum tube perpendicular to the length direction provided in an embodiment of the utility model;

[0016] Figure 2 A cross-sectional view perpendicular to the length direction of the PTC heater provided in an embodiment of the utility model (before the second side wall is pressed);

[0017] Figure 3 A schematic diagram of a PTC heater provided in an embodiment of the utility model;

[0018] Figure 4 The embodiment of the utility model provides Figure 3 AA cross-sectional view (after the second side wall is compressed).

[0019] In the figure: aluminum tube body 1, heat sink 2, first side wall 3, second side wall 4, PTC heating core 5, pressing handle 6, second side wall outer surface 7, first arc surface 8, second arc surface 9, first part 10, second part 11, second side wall inner surface 12. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] In the description of the present invention, it should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0022] The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include one or more of the features; in the description of the present utility model, unless otherwise specified, "several" means two or more.

[0023] like Figure 1-Figure 4The utility model provides an aluminum tube in the first embodiment, including an aluminum tube body 1 for encapsulating a PTC heating core 5, wherein the aluminum tube body 1 is a rectangular tube, and the aluminum tube body 1 includes two first side walls 3 for arranging a heat sink 2, wherein the first side walls 3 are heat dissipation surfaces of the aluminum tube, and the two first side walls 3 are arranged opposite to each other, and the aluminum tube body 1 also includes two second side walls 4 opposite to each other, wherein the first side walls 3 and the second side walls 4 both extend along the length direction of the aluminum tube body, and along the length direction of the aluminum tube body, both ends of the aluminum tube body 1 are An opening is provided for the PTC heating core 5 to extend into, and the second side wall 4 is recessed toward the inner side of the aluminum tube body 1. A pressing handle 6 is provided on the outer surface 7 of the second side wall to facilitate the application of external force to the second side wall 4. The pressing handle 6 is connected to the outer surface 7 of the second side wall through a first arc surface 8. The end of the outer surface 7 of the second side wall close to the first side wall 3 is provided with a second arc surface 9, and the second arc surface 9 is recessed toward the inner side of the aluminum tube body 1. The pressing handle 6, the first arc surface 8, and the second arc surface 9 all extend along the length direction of the aluminum tube body 1. In this embodiment, the PTC heating core 5 extends into the aluminum tube body 1 along the length direction of the aluminum tube body (the length direction of the aluminum tube body is the direction perpendicular to the computer screen), and pressure is applied to the pressing handles 6 on both sides of the same aluminum tube at the same time, and the second side wall 4 deforms inward, driving the two first side walls 3 to compress inward, pressing the PTC heating core 5 (such as Figure 4 ).

[0024] The pressing handle 6 includes a first part 10 close to the aluminum tube body 1 and a second part 11 away from the aluminum tube body 1. The first part 10 is connected to the outer surface 7 of the second side wall through a first arc surface 8, which is perpendicular to the length direction of the aluminum tube body 1. The cross section of the second part 11 is rectangular, and the cross section of the first part 10 is trapezoidal, and the short side of the trapezoid is arranged close to the aluminum tube body 1. In this embodiment, the first part 10 is a trapezoidal bar extending along the length direction of the aluminum tube body, and the second part 11 is a rectangular bar extending along the length direction of the aluminum tube body. In order to facilitate finding the force point, the utility model is designed with a pressing handle 6. When the pressing handle 6 is subjected to inward force, the second side wall 4 will appear inward displacement. Since the lower half of the pressing handle 6 adopts a conical design (trapezoidal design), the force point is more concentrated on the second side wall 4, which makes it easier to drive the first side wall 3 to be concave.

[0025] In this embodiment, the pressing handle 6 is connected to the outer surface 7 of the second side wall through the first arc surface 8, which reduces the pressure required for deformation and the interference phenomenon that is easy to produce, and facilitates the deformation of the second side wall 4 under force.

[0026] In this embodiment, a second arc surface 9 is provided on the end of the second side wall outer surface 7 close to the first side wall 3, so that when the second side wall 4 is deformed, the first side wall 3 will not bend or deform, thereby avoiding deformation of the heat sink 2 connected to the first side wall 3 due to stress.

[0027] In this embodiment, the width of the first side wall 3 is greater than the width of the second side wall 4 (the width direction of the first side wall 3 is Figure 1 The vertical direction of the second side wall 4 is Figure 1 in the horizontal direction).

[0028] In this embodiment, the inner surface 12 of the second side wall is an arc surface. In this embodiment, along the width direction of the second side wall 4, the pressing handle 6 is arranged at the middle position of the second side wall 4 to better bear the force.

[0029] The second embodiment of the utility model provides a PTC heater, including a plurality of heat sinks 2, a plurality of PTC heating cores 5, and the aforementioned plurality of aluminum tubes, an aluminum tube body 1 is provided between two adjacent heat sinks 2, the PTC heating cores 5 are encapsulated in the aluminum tube body 1, and the PTC heating cores 5 correspond one to one with the aluminum tube body 1. In this embodiment, the heat sink 2 is welded to the first side wall 3 of the aluminum tube body.

[0030] The PTC heater provided by the utility model can be used for heating new energy vehicles, or other fields using PTC heating.

[0031] Embodiment 3 of the present invention provides a method for manufacturing a PTC heater: S1, installing the heat sink 2 on the first side wall 3 of the aluminum tube body; S2, installing the PTC heating core 5 into the aluminum tube body 1; S3, applying an external force to the second side wall 4 of the aluminum tube body through the pressing handle 6, so that the second side wall 4 moves toward the inner side of the aluminum tube body, thereby driving the first side wall 3 of the aluminum tube body to press the PTC heating core 5.

[0032] The PTC heater provided by the utility model has low cost, light weight, simple assembly process, and is easy to realize automated production. The heat sink 2 and the aluminum tube can be welded together, and the heat transfer effect is good, avoiding the problem of power reduction of the PTC heating core due to poor heat dissipation effect.

[0033] In the present invention, the heat dissipation surface of the aluminum tube (the first side wall 3) and the heat sink 2 can be assembled together in advance, and the first side wall 3 and the heat sink 2 can be connected by brazing, gluing or any other connection method, and then the PTC heating core 5 is inserted into the aluminum tube body 1 (such as Figure 2 ), by pressing the handle 6 to apply pressure to the second side wall 4 of the aluminum tube body, so that the second side wall 4 shrinks inward, driving the first side wall 3 to shrink inward to fix the PTC heating core 5 (such as Figure 4 ).

[0034] In this embodiment, the second side wall 4 and the pressing handle 6 form an acute angle and are designed with a void-avoiding feature, so that the second side wall 4 is concave under force and avoids interference with the pressing handle 6 .

[0035] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An aluminum tube, characterized in that: The invention comprises an aluminum tube body for encapsulating a PTC heating core, wherein the aluminum tube body is a rectangular tube, and the aluminum tube body comprises two first side walls for arranging a heat sink, and the two first side walls are arranged opposite to each other, and the aluminum tube body also comprises two second side walls opposite to each other, and the first side wall and the second side wall both extend along the length direction of the aluminum tube body, and openings for the PTC heating core to extend into are arranged at both ends of the aluminum tube body along the length direction of the aluminum tube body, and the second side wall is recessed toward the inner side of the aluminum tube body, and a pressing handle is arranged on the outer surface of the second side wall, and the pressing handle is connected to the outer surface of the second side wall through a first arc surface, and a second arc surface is arranged at an end of the outer surface of the second side wall close to the first side wall, and the second arc surface is recessed toward the inner side of the aluminum tube body, and the pressing handle, the first arc surface and the second arc surface all extend along the length direction of the aluminum tube body.

2. The aluminum tube according to claim 1, characterized in that: The width of the first side wall is greater than the width of the second side wall.

3. The aluminum tube according to claim 1, characterized in that: The inner surface of the second side wall is a curved surface.

4. The aluminum tube according to claim 1, characterized in that: Along the width direction of the second side wall, the pressing handle is arranged at a middle position of the second side wall.

5. The aluminum tube according to claim 1, characterized in that: The pressing handle includes a first part close to the aluminum tube body and a second part away from the aluminum tube body. The first part is connected to the outer surface of the second side wall through a first arc surface, which is perpendicular to the length direction of the aluminum tube body. The cross-section of the second part is rectangular, and the cross-section of the first part is trapezoidal, and the short side of the trapezoid is set close to the aluminum tube body.

6. A PTC heater, characterized in that: It comprises a plurality of heat sinks, a plurality of PTC heating cores, and also comprises a plurality of aluminum tubes as described in any one of claims 1 to 5, an aluminum tube body is provided between two adjacent heat sinks, the PTC heating core is encapsulated in the aluminum tube body, and the PTC heating core corresponds to the aluminum tube body one by one.

7. The PTC heater according to claim 6, characterized in that: The heat sink is connected to the first side wall of the aluminum tube body by welding.

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