Edge packaging structure of thick film heater

Abstract

An edge packaging structure of a thick film heater comprises two metal substrates which are parallel and opposite to each other, the edges of the two metal substrates are fixedly packaged, a thick film heating circuit is printed on the inner surface of each metal substrate, and a long filler strip is clamped on the whole edge between the two metal substrates. And the surface of the long filler strip and the edge contact surfaces of the two metal substrates are welded, fixed and packaged. According to the utility model, the design is reasonable, the long filler strips are clamped on the whole edge of the metal substrate, and the edge can be attached or keep a proper small gap during welding, so that the automatic welding of a machine can be completely carried out, the production efficiency is greatly improved, the welding flux consumption is reduced, and the welding and packaging quality is high.

Description

Technical Field

[0001] The utility model relates to a thick film heating device, in particular to an edge packaging structure of a thick film heater. Background Art

[0002] Thick film heating devices have obvious advantages in electric heating applications due to their fast heating speed, uniform temperature distribution, and high thermal efficiency. At present, many thick film heaters use two metal substrates with thick film heating circuits printed on them, which are parallel and welded at the edges to form a package. This can protect the thick film heating circuit and prevent the two metal substrates from thermal deformation due to temperature asymmetry. However, since the metal substrates are generally flat and there is a parallel gap between the two sheets, the gap between the edges of the two metal substrates during welding is too large, and machine automated welding is almost impossible. Manual welding correction is usually required, the amount of solder used is large, the production efficiency is not ideal, and the welding quality is not stable enough. Summary of the invention

[0003] In view of the deficiencies of the prior art, the utility model provides an edge packaging structure of a thick film heater which has a reasonable design and is convenient for automatic welding.

[0004] The utility model comprises two parallel metal substrates which are facing each other and fixedly packaged at their edges. A thick film heating circuit is printed on the inner surface of each metal substrate. A long pad is sandwiched along the entire edge between the two metal substrates. The surface of the long pad is welded and fixedly packaged with the edge contact surfaces of the two metal substrates.

[0005] The utility model has a reasonable design, and a long pad is clamped on the entire edge of the metal substrate. The edge can be fitted or maintain a suitable small gap during welding, and machine automated welding can be fully performed, which greatly improves production efficiency, saves solder consumption, and has high welding packaging quality.

[0006] The present invention is further described below in conjunction with the accompanying drawings and specific embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is the main schematic diagram of the embodiment.

[0008] Figure 2 It is the main schematic diagram of the long pad.

[0009] Figure 3 yes Figure 1 Enlarged schematic diagram of the AA section. DETAILED DESCRIPTION

[0010] like Figures 1 to 3As shown, two metal substrates 1 are parallel and facing each other, and a thick film heating circuit 2 is printed on the inner surface of each metal substrate 1. A long pad 3 is sandwiched between the entire edge of the two metal substrates 1, and the surface of the long pad 3 and the edge contact surface of the two metal substrates 1 are welded and fixed to the package.

[0011] The long pad strip 3 can be a continuous strip along the entire edge of the metal substrate 1, which can achieve a better welding packaging effect.

[0012] In this embodiment, a mica sheet 4 is arranged between the inner surfaces of the two metal substrates 1 for insulation and isolation to prevent the two thick film heating circuits 2 from conducting in contact with each other.

Claims

1. An edge packaging structure of a thick film heater, comprising two parallel metal substrates facing each other and fixedly packaged at the edges, each metal substrate having a thick film heating circuit printed on its inner surface, characterized by: A long pad (3) is sandwiched along the entire edge between the two metal substrates (1), and the surface of the long pad (3) and the edge contact surfaces of the two metal substrates (1) are welded and fixedly packaged.

2. The edge packaging structure of the thick film heater according to claim 1, characterized in that: The long pad strip (3) is a strip that is continuous along the entire edge of the metal base plate (1).

3. The edge packaging structure of the thick film heater according to claim 1 or 2, characterized in that: A mica sheet (4) is arranged between the inner surfaces of the two metal substrates (1) for insulation and isolation.

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