New energy automobile heater brazing structure

Abstract

The utility model discloses a new energy automobile heater brazing structure, and relates to the technical field of automobile heater brazing, the new energy automobile heater brazing structure comprises a silk-screen printing heating plate and an aluminum extrusion cooling fin, the top of the silk-screen printing heating plate is provided with an aluminum foil and brazing filler metal, and the top of the silk-screen printing heating plate is welded with the aluminum extrusion cooling fin through the aluminum foil and the brazing filler metal; the silk-screen printing heating plate comprises a heating substrate, a silk-screen printing layer is printed at the bottom of the heating substrate, the aluminum extrusion cooling fin comprises a cooling substrate, an aluminum extrusion heat-conducting fin is arranged at the top of the cooling substrate, and the heating substrate is welded with the cooling substrate. The heating substrate is welded with the heat dissipation substrate and the aluminum extrusion heat-conducting fin, resistance heating of the silk-screen printing layer and heat exchange with cooling liquid can be achieved, so that the temperature adjusting effect is achieved, the aluminum extrusion heat-conducting fin can better conduct heat dissipation work due to the fact that the heat conductivity of aluminum is good, and the heat dissipation efficiency of the equipment is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile heater brazing, in particular to a new energy automobile heater brazing structure. Background Art

[0002] Stainless steel thick film heating technology is a heating method widely used in industrial production. Its characteristic is that the heater can be closely combined with the heated object, so that the heating energy can be fully transferred to the heated object, thereby improving the heating efficiency. However, the existing stainless steel thick film heating technology has some shortcomings, such as:

[0003] At present, stainless steel thick film heaters are limited by screen printing technology, and the heating plate substrate is guaranteed to be flat and has no heat dissipation structure. Therefore, the surface temperature of the substrate is high, and its heat cannot be fully and effectively utilized, resulting in a waste of some waste heat, which leads to reduced thermal efficiency. In order to improve thermal efficiency, the screen-printed heating plate needs to be brazed with a heat dissipation structure. According to the application scenario and welding process, the most ideal material is aluminum alloy. However, during the welding process, due to the influence of heat, deformation problems are likely to occur, affecting the overall appearance and use of the heating plate.

[0004] Therefore, we propose a new energy vehicle heater brazing structure to solve the problem that most existing stainless steel thick film heaters are prone to deformation, which affects the overall appearance and use of the heating plate; adding a groove to the heating plate can reduce the deformation caused by brazing. Utility Model Content

[0005] The purpose of the utility model is to provide a new energy vehicle heater brazing structure to solve the problem that most stainless steel thick film heaters on the market are prone to deformation, which affects the overall appearance and use of the heating plate.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a new energy vehicle heater brazing structure, comprising a screen-printed heating plate and an aluminum extruded heat sink, wherein aluminum foil and brazing material are provided on the top of the screen-printed heating plate, and the top of the screen-printed heating plate is welded to the aluminum extruded heat sink through the aluminum foil and the brazing material;

[0007] The screen-printed heating plate comprises a heating substrate, and a screen-printed layer is printed on the bottom of the heating substrate, and the aluminum extruded heat sink comprises a heat sink substrate, an aluminum extruded heat conductive sheet is arranged on the top of the heat sink substrate, and the heating substrate is welded to the heat sink substrate.

[0008] By welding the heating substrate to the heat dissipation substrate and the aluminum extruded heat conductive sheet, the resistance heat of the screen-printed layer can be used to exchange heat with the coolant, thereby regulating the temperature. Since the thermal conductivity of aluminum is about 237W / (m·K), the aluminum extruded heat sink can better dissipate heat, thereby increasing the heat dissipation efficiency of the equipment.

[0009] As the preferred technical solution of the utility model, the surface of the heating substrate is a flat structure, and the screen printing layer is printed on the bottom surface of the heating substrate. The roughness Ra2.0 needs to be ensured during production to prevent problems such as pores and slag inclusions at the brazing position.

[0010] As a preferred technical solution of the utility model, an exhaust hole is provided at the inner bottom of the heat dissipation substrate, and the exhaust hole is fitted to the top of the screen-printed heating plate.

[0011] Preferably, exhaust holes are provided at the bottom of the heat dissipation substrate to ensure that excess flux and air can be discharged through the holes during welding, so that problems such as pores and slag inclusions will not occur during welding of the screen-printed heating plate and the aluminum extruded heat sink.

[0012] As a preferred technical solution of the utility model, the aluminum extruded heat conductive sheet is an aluminum extruded integrated structure, and the aluminum extruded heat conductive sheet has a corrosion-resistant coating structure.

[0013] As a preferred technical solution of the utility model, the screen-printed heating plate is welded to the aluminum extruded heat sink, and the exhaust hole is fitted to the heating substrate.

[0014] As a preferred technical solution of the utility model, the screen printed heating plate and the aluminum extruded heat sink are integrated after welding, and the aluminum extruded heat sink has a toothed structure, and there is no gap at the connection between the screen printed heating plate and the aluminum extruded heat sink.

[0015] Preferably, the screen-printed heating plate and the aluminum extruded heat sink can be more tightly welded, thereby increasing the firmness of the device and the stability during use.

[0016] As a preferred technical solution of the utility model, a groove is provided at each heat sink connection of the aluminum extruded heat sink, and the groove is located at the bottom of the aluminum extruded heat sink.

[0017] Preferably, the spacing between each heat sink can be spaced apart, so that the aluminum extruded heat sink can be more stable when dissipating heat.

[0018] As a preferred technical solution of the utility model, screw holes are arranged around the inner side of the screen-printed heating plate, and the screw holes are located on the outer side of the heat dissipation substrate.

[0019] Preferably, the adoption of this solution can make other devices more stable when connected to the mechanism, thereby increasing the firmness of the device during installation.

[0020] As a preferred technical solution of the utility model, when the heating substrate and the heat dissipation substrate are welded, the exhaust holes are also aligned and welded with the heating substrate to form an integral body.

[0021] Compared with the prior art, the utility model has the following beneficial effects: by welding the heating substrate with the heat dissipation substrate and the aluminum extruded heat conductive sheet, the resistance of the screen printing layer can be used to generate heat, and heat exchange can be performed with the coolant, thereby playing a role in regulating the temperature. Moreover, since the thermal conductivity of aluminum is about 237W / (m·K), the aluminum extruded heat sink can be better used for heat dissipation, thereby increasing the heat dissipation efficiency of the device.

[0022] By setting exhaust holes at the bottom of the heat dissipation substrate, it is ensured that excess flux and air can be discharged through the pores during the welding process, so that there will be no problems such as pores and slag inclusions during the welding process of the screen printed heating plate and the aluminum extruded heat sink. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 This is a schematic diagram of the layered structure of the facade of the utility model;

[0024] Figure 2 It is a schematic diagram of the vertical layered structure of the screen printing heating plate of the utility model;

[0025] Figure 3 It is a schematic diagram of the structure of the aluminum extruded heat sink of the utility model;

[0026] Figure 4 This is a schematic diagram of the front elevation structure of the utility model;

[0027] Figure 5 It is a schematic diagram of the top view structure of the utility model;

[0028] Figure 6 It is a schematic diagram of the structure of the utility model when viewed from above.

[0029] In the figure: 100, screen-printed heating plate; 101, heating substrate; 102, aluminum foil; 103, screen-printed layer; 200, aluminum extruded heat sink; 201, heat sink substrate; 202, aluminum extruded thermal conductive sheet; 203, exhaust hole. DETAILED DESCRIPTION

[0030] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0031] In order to solve the problem that most stainless steel thick film heaters in the prior art are prone to deformation, which affects the overall appearance and use of the heating plate, the following solution is disclosed. Please refer to Figure 1-6 The utility model provides a technical solution: a new energy vehicle heater brazing structure, comprising a screen-printed heating plate 100 and an aluminum extruded heat sink 200, wherein an aluminum foil 102 and a brazing material are arranged on the top of the screen-printed heating plate 100, and the top of the screen-printed heating plate 100 is welded to the aluminum extruded heat sink 200 through the aluminum foil 102 and the brazing material;

[0032] The screen-printed heating plate 100 includes a heating substrate 101, and an aluminum foil 102 is printed on the top of the heating substrate 101, and the aluminum extruded heat sink 200 includes a heat sink 201, and an aluminum extruded heat conductive sheet 202 is arranged on the top of the heat sink 201, and the heating substrate 101 is welded to the heat sink 201;

[0033] The surface of the heating substrate 101 is a flat structure, and the screen printing layer 103 is printed on the bottom surface of the heating substrate 101; the inner bottom of the heat dissipation substrate 201 is provided with an exhaust hole 203, and the exhaust hole 203 and the screen printing heating plate 100 are bonded; the aluminum extruded heat conductive sheet 202 is an aluminum extrusion integrated structure, and the aluminum extruded heat conductive sheet 202 has a corrosion-resistant coating structure;

[0034] The screen printed heating plate 100 is welded with the aluminum extruded heat sink 200, and the exhaust hole 203 is fitted with the heating substrate 101; the screen printed heating plate 100 and the aluminum extruded heat sink 200 are integrated after welding, and the aluminum extruded heat sink 200 has a toothed structure, and there is no gap at the connection between the screen printed heating plate 100 and the aluminum extruded heat sink 200; each heat sink connection of the aluminum extruded heat sink 200 is provided with a groove, and the groove is located at the bottom of the aluminum extruded heat sink 200.

[0035] The outer side of the heating substrate 101 is connected to the screen printing layer 103, and the screen printing layer 103 is provided with an insulating medium layer, a resistance layer, an electrode layer and an isolation layer in sequence from bottom to top; screw holes are provided around the inner side of the screen printing heating plate 100, and the screw holes are located on the outer side of the heat dissipation substrate 201; when the heating substrate 101 and the heat dissipation substrate 201 are welded, the exhaust hole 203 will also be aligned with the heating substrate 101 for welding to form a whole;

[0036] During the welding process, due to thermal expansion and contraction, the screen-printed heating plate 100 and the aluminum extruded heat sink 200 will be thermally deformed. The thermal expansion coefficient of steel is about 1.2×10^-5 / ℃, and the thermal expansion coefficient of aluminum alloy is 2.4×10^-5 / ℃.

[0037] Therefore, in the welding process, the welding material and flux need to be melted at high temperature, and the temperature is raised to about 570-700 / ℃. After cooling, the flux solidifies to achieve the purpose of welding. Since the thermal expansion coefficients of stainless steel and aluminum alloy are different, according to the linear expansion coefficient α=ΔL / (L0×ΔT), where ΔL is the change in length of the object, L0 is the initial length, and ΔT is the temperature change; it can be seen that there will be differences in the length change after the temperature is cooled;

[0038] After welding, the screen-printed heating plate 100 and the aluminum extruded heat sink 200 are considered as a whole; the difference in ΔL after cooling will cause stress at the edge of the welding position; the teeth in the aluminum extruded heat conductive sheet 202 are to reduce the generation of internal stress and prevent the occurrence of welds.

[0039] Thereby completing a series of tasks, the contents not described in detail in this specification belong to the prior art known to professional and technical personnel in this field.

[0040] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

Claims

1. A new energy vehicle heater brazing structure, comprising a screen printed heating plate (100) and an aluminum extruded heat sink (200), characterized in that: Aluminum foil (102) and solder are provided on the top of the screen-printed heating plate (100), and the top of the screen-printed heating plate (100) is welded to the aluminum extruded heat sink (200) via the aluminum foil (102) and the solder; The screen-printed heating plate (100) comprises a heating substrate (101), and a screen-printed layer (103) is printed on the bottom of the heating substrate (101); the aluminum extruded heat sink (200) comprises a heat sink substrate (201), an aluminum extruded heat conductive sheet (202) is arranged on the top of the heat sink substrate (201), and the heating substrate (101) and the heat sink substrate (201) are welded.

2. The new energy vehicle heater brazing structure according to claim 1 is characterized in that: The surface of the heating substrate (101) is a flat structure, and the screen printing layer (103) is printed on the bottom surface of the heating substrate (101).

3. The new energy vehicle heater brazing structure according to claim 1 is characterized in that: An exhaust hole (203) is provided at the inner bottom of the heat dissipation substrate (201), and the exhaust hole (203) is in contact with the top of the screen-printed heating plate (100).

4. The new energy vehicle heater brazing structure according to claim 1, characterized in that: The aluminum extruded heat conductive sheet (202) is an aluminum extruded integrated structure, and the aluminum extruded heat conductive sheet (202) has a corrosion-resistant coating structure.

5. The new energy vehicle heater brazing structure according to claim 1, characterized in that: The screen-printed heating plate (100) is welded to the aluminum extruded heat sink (200), and the exhaust hole (203) and the heating substrate (101) are attached.

6. The new energy vehicle heater brazing structure according to claim 1, characterized in that: The screen-printed heating plate (100) and the aluminum extruded heat sink (200) are integrated after welding, and the aluminum extruded heat sink (200) has a tooth-shaped structure, and there is no gap at the connection between the screen-printed heating plate (100) and the aluminum extruded heat sink (200).

7. The new energy vehicle heater brazing structure according to claim 1, characterized in that: Each heat sink connection of the aluminum extruded heat sink (200) is provided with a groove, and the groove is located at the bottom of the aluminum extruded heat sink (200).

8. The new energy vehicle heater brazing structure according to claim 6, characterized in that: The outside of the heating substrate (101) is connected to the screen printing layer (103), and the inside of the screen printing layer (103) is provided with an insulating medium layer, a resistance layer, an electrode layer and an isolation layer in sequence from bottom to top.

9. The new energy vehicle heater brazing structure according to claim 1, characterized in that: The screen-printed heating plate (100) is provided with screw holes around its inner side, and the screw holes are located on the outer side of the heat dissipation substrate (201).

10. The new energy vehicle heater brazing structure according to claim 3, characterized in that: When the heating substrate (101) and the heat dissipation substrate (201) are welded, the exhaust hole (203) is also aligned and welded with the heating substrate (101) to form an integral body.

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