Terminal integrated heat sink strip, PTC heating core body and PTC heater

Abstract

The utility model provides a terminal integrated heat sink strip, which comprises a heat sink strip body electrically connected with a negative electrode of a heating aluminum tube, the heat sink strip body comprises a heat dissipation fin and a plurality of frames, the heat dissipation fin is arranged in an accommodating space enclosed by the plurality of frames, a conversion terminal is integrally formed on one frame, and the conversion terminal is connected with the heat dissipation fin. The conversion terminal is used for being electrically connected with the negative electrode output end of the PTC heater. The utility model further provides a PTC heating core which comprises a plurality of heating aluminum pipes and a plurality of heat dissipation strips, one heating aluminum pipe is clamped between every two adjacent heat dissipation strips, at least one heat dissipation strip adopts the terminal integrated heat dissipation strip, a heating chip, a positive electrode plate and a negative electrode plate are wrapped in the heating aluminum pipes, and the positive electrode plate and the negative electrode plate are arranged in the heating aluminum pipes. An insulating film is pasted on the surface of the positive electrode slice, and the negative electrode slice is electrically connected with the conversion terminal on the terminal integrated heat dissipation strip through the heating aluminum pipe. The utility model also provides a PTC heater.

Description

Technical Field

[0001] The utility model relates to the field of PTC heaters, in particular to a terminal-integrated heat dissipation strip, a PTC heating core and a PTC heater. Background Art

[0002] The existing methods for connecting the negative electrode of the low-voltage PTC heater core to the negative electrode of the product assembly are mainly: 1. Welding a certain adapter terminal to the head of the heat sink, the adapter terminal is assembled with the mounting hole of the heat sink aluminum block on the control box and fixed with screws, and the negative electrode of the core is connected to the negative electrode of the product assembly through the heat sink aluminum block; 2. Welding a certain adapter terminal to the head of the heat sink, insert-molding several matching metal inserts in the PTC heater control box, one end of the metal insert is plugged into the adapter terminal on the head of the heat sink, and the other end of the metal insert serves as the negative terminal of the product. Both of the above methods require other connecting metal parts to connect the negative electrode of the PTC heater core to the negative electrode of the product, resulting in low connection reliability and high process costs.

[0003] Therefore, it is necessary to design a terminal-integrated heat dissipation strip to overcome the above problems. Utility Model Content

[0004] The purpose of the present invention is to overcome the defects of the prior art and provide a terminal-integrated heat dissipation strip, a PTC heating core and a PTC heater. The present invention at least solves some of the problems in the prior art.

[0005] The utility model is achieved in this way:

[0006] The utility model provides a terminal-integrated heat sink, comprising a heat sink body electrically connected to the negative electrode of a heating aluminum tube, the heat sink body comprising heat sink fins and a plurality of frames, the heat sink fins being arranged in a receiving space enclosed by the plurality of frames, one of the frames being integrally formed with a transfer terminal, the transfer terminal being used to be electrically connected to the negative electrode output end of a PTC heater.

[0007] Furthermore, the adapter terminal is provided at the head of the heat dissipation strip body.

[0008] Furthermore, the thickness of the frame of the heat dissipation strip body where the adapter terminal is provided is greater than the thickness of the frame at other positions on the heat dissipation strip body.

[0009] Furthermore, the adapter terminal is fixedly connected to the heat dissipation aluminum block in the PTC heater control box by screws. The adapter terminal includes a mounting portion and a connecting portion connected to the frame. The mounting portion is arranged perpendicular to the connecting portion, and an opening is provided on the mounting portion to cooperate with the screw.

[0010] Furthermore, the transfer terminal is obtained by bending one side of an L-shaped aluminum alloy sheet.

[0011] The utility model also provides a PTC heating core, including several heating aluminum tubes and several heat dissipation strips, a heating aluminum tube is sandwiched between two adjacent heat dissipation strips, at least one heat dissipation strip adopts the above-mentioned terminal integrated heat dissipation strip, the heating aluminum tube wraps the heating chip, the positive electrode sheet, and the negative electrode sheet, the surface of the positive electrode sheet is adhered with an insulating film, and the negative electrode sheet is electrically connected to the adapter terminal on the terminal integrated heat dissipation strip through the heating aluminum tube.

[0012] The utility model also provides a PTC heater, including a negative wire of a PTC heater power harness, a positive wire of a PTC heater power harness, and a control box, and also includes the above-mentioned PTC heating core, wherein a PCBA board and a heat dissipation aluminum block are provided in the control box, the positive electrode sheet in the heating aluminum tube is electrically connected to the positive wire of the PTC heater power harness through the PCBA board, and the adapter terminal on the terminal-integrated heat dissipation strip is electrically connected to the negative wire of the PTC heater power harness through the heat dissipation aluminum block.

[0013] Furthermore, the heat dissipation aluminum block is provided with a plurality of mounting bosses, the adapter terminal is fixedly connected to one of the mounting bosses by a screw, and the negative electrode line of the PTC heater power harness is fixed to the other mounting boss by a flange bolt connection.

[0014] Furthermore, the mounting boss is in the shape of a rectangular block.

[0015] Furthermore, a positive busbar is welded on the PCBA board, and the positive line of the PTC heater power harness is electrically connected to the PCBA board through the positive busbar.

[0016] The utility model has the following beneficial effects:

[0017] 1. The utility model provides a terminal integrated heat dissipation strip. The transfer terminal and the heat dissipation strip are formed in one piece. Compared with the traditional method, the welding process is reduced, the connection reliability is improved, and the process cost is reduced.

[0018] 2. The utility model realizes the connection and conduction between the negative electrode of the PTC heating core and the negative electrode of the PTC heater through the transfer terminal integrally formed on the heat dissipation strip.

[0019] 3. The transfer terminal provided by the utility model has a simple structure and is easy to manufacture. It is fixedly connected to the heat dissipation aluminum block in the control box by screws, and the connection reliability is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 An overall diagram of the terminal-integrated heat dissipation strip provided in an embodiment of the present utility model;

[0022] Figure 2 The embodiment of the present invention provides Figure 1 Enlarged view of the upper part;

[0023] Figure 3 This is an assembly diagram of the terminal-integrated heat dissipation strip and the control box provided in an embodiment of the present utility model.

[0024] In the figure: heat dissipation strip 1, frame 2, heat dissipation fin 3, adapter terminal 4, opening 5, mounting boss 6, negative wire of PTC heater power harness 7, control box 8, positive wire of PTC heater power harness 9, heating aluminum tube 10, mounting part 11, connecting part 12. DETAILED DESCRIPTION

[0025] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0026] In the description of this utility model, it should be understood that the terms "center," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, indicating positions or relationships, are based on the positions or relationships shown in the accompanying drawings and are intended solely to facilitate the description of this utility model and simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In the description of this utility model, unless otherwise specified, "several" means two or more.

[0027] like Figure 1-Figure 3, the first embodiment of the present invention provides a terminal-integrated heat sink 1, including a heat sink body electrically connected to the negative pole of the heating aluminum tube 10, the heat sink body including heat sink fins 3 and a plurality of frames 2, the heat sink fins 3 are arranged in a receiving space enclosed by the plurality of frames 2, one of which has an adapter terminal 4 integrally formed thereon, the adapter terminal 4 being used to electrically connect to the negative output end of the PTC heater (in this embodiment, the adapter terminal 4 is electrically connected to the negative pole line 7 of the PTC heater power harness). The adapter terminal 4 is provided at the head of the heat sink body (i.e., the top of the heat sink 1 in the figure). The thickness of the frame 2 affects the cost of the parts. The thickness of the frame where the adapter terminal 4 is provided on the heat sink 1 is consistent with the thickness of the adapter terminal 4, and the frames at other positions are relatively thinner to reduce costs.

[0028] In this embodiment, the adapter terminal 4 is fixedly connected (electrically connected) to the heat sink aluminum block within the PTC heater control box 8 via screws. The heat sink aluminum block serves as a heat dissipation and negative electrical connection. The adapter terminal 4 includes a mounting portion 11 and a connecting portion 12 connected to the frame 2. The mounting portion 11 is arranged perpendicular to the connecting portion 12 and is provided with an opening 5 for receiving the screws. The mounting portion 11 is fixed to the mounting boss 6 of the heat sink aluminum block via screws. In this embodiment, the adapter terminal 4 is formed by bending one side of an L-shaped aluminum alloy sheet.

[0029] Embodiment 2 of the present invention provides a PTC heating core, including several heating aluminum tubes 10 and several heat dissipation strips, a heating aluminum tube 10 is sandwiched between two adjacent heat dissipation strips, at least one heat dissipation strip adopts the above-mentioned terminal integrated heat dissipation strip 1, the heating aluminum tube 10 wraps the heating chip, the positive electrode sheet, and the negative electrode sheet, the surface of the positive electrode sheet is adhered with an insulating film, and the negative electrode sheet is electrically connected to the adapter terminal 4 on the terminal integrated heat dissipation strip 1 through the heating aluminum tube 10.

[0030] Embodiment 3 of the present invention provides a PTC heater, including a negative wire 7 of a PTC heater power harness, a positive wire 9 of a PTC heater power harness, and a control box 8, and also includes the above-mentioned PTC heating core. The control box 8 is provided with a PCBA board and a heat dissipation aluminum block. The positive electrode sheet in the heating aluminum tube 10 is electrically connected to the positive wire 9 of the PTC heater power harness through the PCBA board, and the adapter terminal 4 on the terminal-integrated heat dissipation strip 1 is electrically connected to the negative wire 7 of the PTC heater power harness through the heat dissipation aluminum block.

[0031] In this embodiment, the heat dissipation aluminum block is provided with several mounting bosses 6. The adapter terminal 4 is fixedly connected to one of the mounting bosses 6 by screws, and the negative electrode line 7 of the PTC heater power harness is fixed to another mounting boss 6 by flange bolts. In this embodiment, the mounting bosses 6 are rectangular blocks.

[0032] In this embodiment, a positive busbar is welded on the PCBA board, and the positive line 9 of the PTC heater power harness is electrically connected to the PCBA board through the positive busbar.

[0033] In the present utility model, the head of the heat dissipation strip 1 is integrally formed with an adapter terminal 4, which is an L-shaped aluminum alloy sheet. One side of the L-shaped aluminum alloy sheet is bent 90°, and an opening 5 for matching with a screw is provided on the side. The adapter terminal 4 is fixedly connected to a mounting boss 6 on the heat dissipation aluminum block in the control box by a screw, which is used to realize electrical connection between the adapter terminal 4 and the heat dissipation aluminum block, and has high reliability.

[0034] The L-shaped aluminum alloy sheet is bent and punched by a tool to obtain the final mounting and fixing structure of the transfer terminal 4 .

[0035] The negative electrode line 7 of the PTC heater power harness is fixed to another mounting boss 6 of the heat dissipation aluminum block in the control box 8 through a flange bolt connection, so as to realize the electrical connection between the negative electrode line 7 of the PTC heater power harness and the heat dissipation aluminum block, thereby realizing the connection and conduction between the negative electrode of the PTC heating core and the negative electrode of the PTC heater.

[0036] Figure 3 The positive wire 9 of the PTC heater power harness is electrically connected to the positive busbar in the control box 8. The positive busbar connects the positive wire 9 of the PTC heater power harness to the positive electrode of the PTC heating core through the PCBA board in the control box 8. The positive busbar is welded to the PCBA board.

[0037] The PTC heater includes a negative wire 7 of the PTC heater power harness, a positive wire 9 of the PTC heater power harness, a control box 8 and a PTC heating core. The PTC heating core is composed of a heating aluminum tube 10 and a heat dissipation strip 1. Figure 3 The PTC heating core consists of four heat dissipation bars. A heating aluminum tube 10 is sandwiched between two adjacent heat dissipation bars. Only the two middle heat dissipation bars 1 have integrated adapter terminals 4. The heating aluminum tube 10 encloses the heating chip, positive electrode sheet, and negative electrode sheet. The heating chip is sandwiched between the positive and negative electrode sheets. However, an insulating film is attached to the surface of the positive electrode sheet, so the positive electrode sheet is not connected to the heat dissipation bars 1. Only the negative electrode sheet is electrically connected to the heat dissipation bars 1 through the heating aluminum tube 10. The positive electrode sheet is electrically connected to the PCBA board in the control box 8. The head of the positive electrode sheet is welded to the PCBA board in the control box 8.

[0038] The current is input from the positive wire 9 of the PTC heater power harness, and is introduced into the PCBA board through the positive busbar fixed to the positive wire 9 of the PTC heater power harness, and then is diverted to the three heating aluminum tubes 10 through the three positive electrode sheets electrically connected to the PCBA board, activating the heating chip to start working, and then output to the heat sink 1 through the heating aluminum tube 10. After passing through the adapter terminal 4 at the head of the heat sink 1, the current is introduced into the negative wire 7 of the PTC heater power harness through the heat dissipation aluminum block.

[0039] The utility model relates to a terminal-integrated heat dissipation strip, which is suitable for the air-conditioning heating system of new energy vehicles and is mainly used for connecting the negative electrode of the PTC heating core and the control box. The utility model designs the negative electrode pin at the head of the heat dissipation strip as a transfer terminal structure.

[0040] The contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0041] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A terminal integrated heat dissipation strip, characterized by: It includes a heat dissipation strip body electrically connected to the negative electrode of the heating aluminum tube, the heat dissipation strip body includes heat dissipation fins and several frames, the heat dissipation fins are arranged in a receiving space surrounded by several frames, one of the frames is integrally formed with a transfer terminal, and the transfer terminal is used to electrically connect to the negative output end of the PTC heater.

2. The terminal-integrated heat dissipation strip according to claim 1, characterized in that: The transfer terminal is arranged at the head of the heat dissipation strip body.

3. The terminal-integrated heat dissipation strip according to claim 1, wherein: The thickness of the frame of the heat dissipation strip body where the adapter terminal is provided is greater than the thickness of the frame at other positions on the heat dissipation strip body.

4. The terminal-integrated heat dissipation strip according to claim 1, wherein: The adapter terminal is fixedly connected to the heat dissipation aluminum block in the PTC heater control box by screws. The adapter terminal includes a mounting portion and a connecting portion connected to the frame. The mounting portion is arranged perpendicular to the connecting portion, and an opening is provided on the mounting portion to cooperate with the screw.

5. The terminal-integrated heat dissipation strip according to claim 4, characterized in that: The transfer terminal is obtained by bending one side of an L-shaped aluminum alloy sheet.

6. A PTC heating core, characterized in that: It includes several heating aluminum tubes and several heat dissipation strips, a heating aluminum tube is sandwiched between two adjacent heat dissipation strips, at least one heat dissipation strip adopts the terminal integrated heat dissipation strip as described in any one of claims 1 to 5, the heating aluminum tube is wrapped with a heating chip, a positive electrode sheet, and a negative electrode sheet, an insulating film is adhered to the surface of the positive electrode sheet, and the negative electrode sheet is electrically connected to the adapter terminal on the terminal integrated heat dissipation strip through the heating aluminum tube.

7. A PTC heater, characterized in that: It includes a negative wire of a PTC heater power harness, a positive wire of a PTC heater power harness, and a control box, and also includes the PTC heating core as described in claim 6, wherein a PCBA board and a heat dissipation aluminum block are provided in the control box, the positive electrode sheet in the heating aluminum tube is electrically connected to the positive wire of the PTC heater power harness through the PCBA board, and the adapter terminal on the terminal integrated heat dissipation strip is electrically connected to the negative wire of the PTC heater power harness through the heat dissipation aluminum block.

8. The PTC heater according to claim 7, wherein: The heat dissipation aluminum block is provided with a plurality of mounting bosses, the adapter terminal is fixedly connected to one of the mounting bosses by a screw, and the negative electrode line of the PTC heater power harness is fixed to the other mounting boss by a flange bolt connection.

9. The PTC heater according to claim 8, wherein: The mounting boss is in the shape of a rectangular block.

10. The PTC heater according to claim 7, wherein: A positive busbar is welded on the PCBA board, and the positive line of the PTC heater power harness is electrically connected to the PCBA board through the positive busbar.

Images