C-type current detection alloy resistor

Abstract

The utility model is suitable for the technical field of resistors, and provides a C-type current detection alloy resistor, which comprises a resistor alloy part, two ends of the resistor alloy part are respectively connected with an electrode, two ends of the resistor alloy part are respectively provided with a bending part, and the bending parts are gradually bent towards the central position of the resistor alloy part from top to bottom. Each electrode is connected to the bending part of the resistor alloy part, extends from the bending part to the central position of the resistor alloy part, and is positioned below the resistor alloy part, and a heat dissipation gap is formed between the two electrodes and the resistor alloy part; according to the utility model, tin can be prevented from climbing to the resistance alloy part during welding of the electrode, the resistance value of the resistance alloy part is prevented from changing, the air convection space is increased, and a good heat dissipation effect is achieved.

Description

Technical Field

[0001] The utility model belongs to the technical field of resistors, and particularly relates to a C-shaped current detecting alloy resistor. Background Art

[0002] A current detecting resistor, that is, a current detection resistor, also known as a current sensing resistor, is mainly connected in series with a device to be detected to sample the current flowing through the device. Generally, the current detecting resistor on the market is prone to the phenomenon of solder creeping during welding, that is, the solder in the soldering will flow onto the alloy material of the current detecting resistor, which will cause the resistance value of the entire current detecting resistor to change, affecting the product accuracy and resulting in inaccurate sampling.

[0003] Therefore, there are defects in the prior art. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the deficiency of the easy occurrence of solder creeping phenomenon in the above-mentioned prior art, and provide a C-shaped current detecting alloy resistor.

[0005] The utility model is realized as follows: a C-shaped current detecting alloy resistor includes a resistor alloy part, and an electrode is connected to each end of the resistor alloy part. Bendings are provided at both ends of the resistor alloy part, and the bendings gradually bend towards the center position of the resistor alloy part from top to bottom. Each electrode is connected to the bending of the resistor alloy part, and each electrode extends from the bending towards the center position of the resistor alloy part. Each electrode is located below the resistor alloy part, and a heat dissipation gap is formed between the two electrodes and the resistor alloy part.

[0006] Further, the height of the heat dissipation gap is 3.2 mm.

[0007] Further, the junction where each electrode is connected to the bending is a bending part that gradually bends upwards.

[0008] Further, the material of the resistor alloy part is at least one of manganin, copper-manganese-tin, copper-manganese-nickel, Karma or iron-chromium-aluminum alloy.

[0009] Further, the material of each electrode is oxygen-free copper TU1 material.

[0010] For the C-shaped current detecting alloy resistor provided by the utility model, bendings are provided at both ends of the resistor alloy part, which can raise the height of the resistor alloy part to a certain extent, so that there is a certain distance between the resistor alloy part and the electrode, which can prevent the solder from climbing onto the resistor alloy part during welding and avoid the change of the resistance value of the resistor alloy part. At the same time, the height of the formed heat dissipation gap is high enough, and when the current passes through the electrode, the resistor alloy part and the other electrode in sequence, the space for air convection is increased, achieving a good heat dissipation effect. Description of the Drawings

[0011] In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] The following drawings are only intended to illustrate and explain the present invention schematically and do not limit the scope of the present invention.

[0013] Figure 1 It is a schematic structural diagram of a C-type current-detecting alloy resistor provided by the present invention.

[0014] Figure 2 It is a schematic diagram of the heat dissipation gap in the present invention.

[0015] Explanation of the reference numerals in the drawings: 1. Resistance alloy part; 11. Bend; 2. Electrode; 21. Bend part; 3. Heat dissipation gap. Detailed implementation manners

[0016] In order to make the objectives, technical solutions and advantages of the present invention clearer, the following further details the present invention in conjunction with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0017] Please refer to Figure 1 - Figure 2 , which is a C-type current-detecting alloy resistor disclosed in the present invention, including a resistance alloy part 1, and an electrode 2 is connected to each end of the resistance alloy part 1. Specifically, the material of the resistance alloy part 1 is at least one of manganese copper, copper manganese tin, copper manganese nickel, Karma or iron chromium aluminum alloy. The above materials all have good resistance characteristics and thermal stability and are suitable for current detection. And the material of each electrode 2 is oxygen-free copper TU1 material, and oxygen-free copper TU1 has high conductivity and good welding performance and is suitable as the material of the electrode 2.

[0018] Both ends of the resistance alloy part 1 are provided with bending parts 11. The bending parts 11 bend gradually from top to bottom towards the central position of the resistance alloy part 1. Each electrode 2 is connected to the bending part 11 of the resistance alloy part 1, and each electrode 2 extends from the bending part 11 towards the central position of the resistance alloy part 1. Each electrode 2 is located below the resistance alloy part 1. The resistance alloy part 1 and the motors at both ends are combined into a "C"-shaped structure. Due to the provision of the bending parts 11, a height difference is formed between the resistance alloy part 1 and the electrode 2, that is, the resistance alloy part 1 is elevated, and the resistance alloy part 1 serves as the resistance area of the entire current detection resistor. Since the resistance alloy part 1 is elevated, all or most of the outer surfaces of the resistance alloy part 1 and the electrodes 2 at both ends are exposed, and the welding part of the electrode 2 can be clearly seen. When welding with the device to be detected through the electrode 2, it is possible to prevent the tin from climbing onto the resistance alloy part 1 to ensure the resistance value of the resistance alloy part 1. Preferably, in order to prevent the resistance alloy part 1 from contacting the device to be detected below, that is, to increase the distance between the resistance alloy part 1 and the welding part of the electrode 2, the junction where each electrode 2 is connected to the bending part 11 is a bending part 21 that bends gradually upward.

[0019] Both the bending part 11 and the bending part 21 are of arc design, making the appearance of the entire current detection resistor tend to be a smooth shape. While being beautiful, it improves the appearance quality of the entire current detection resistor and also helps to reduce stress concentration during the welding process.

[0020] In addition, the "C"-shaped structure formed by the combination of the resistance alloy part 1 and the motors at both ends can effectively reduce the floor area of the entire current detection resistor in the horizontal direction and can better achieve welding with the device to be detected.

[0021] The height difference formed between the resistance alloy part 1 and the electrode 2 under the action of the bending part 11 and the bending part 21 can serve as the heat dissipation gap 3. When the current flows in through the oxygen-free copper electrode 2 at one end, flows through the resistance alloy part 1, and then flows out from the oxygen-free copper electrode 2 at the other end, during this process, the resistance alloy part 1 will generate heat, and the heat will also be conducted to the electrodes 2 at both ends through the resistance alloy part 1. Under the action of the heat dissipation gap 3, the heat dissipation force can well convect with the air in the heat dissipation gap 3, so that the surfaces of the resistance alloy part 1 and the electrode 2 can contact the surrounding ambient air to reduce the temperature of the entire current detection resistor and avoid overheating and affecting the performance.

[0022] In this embodiment, the height of the heat dissipation gap 3 is 3.2 mm. This height increases the space for air convection to ensure the heat dissipation effect while not affecting the function of the entire current detection resistor to prevent tin climbing.

[0023] The above are only two preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any modification, equivalent replacement or improvement made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.

Claims

1. A C-type current detecting alloy resistor, characterized in that: It includes a resistance alloy part (1), with an electrode (2) connected to each end of the resistance alloy part (1). There are bending parts (11) provided at both ends of the resistance alloy part (1). The bending parts (11) bend gradually from top to bottom towards the central position of the resistance alloy part (1). Each electrode (2) is connected to the bending part (11) of the resistance alloy part (1), and each electrode (2) extends from the bending part (11) towards the central position of the resistance alloy part (1). Each electrode (2) is located below the resistance alloy part (1), and a heat dissipation gap (3) is formed between the two electrodes (2) and the resistance alloy part (1).

2. The C-type galvanometer alloy resistor according to claim 1, wherein: The height of the heat dissipation gap (3) is 3.2 mm.

3. A C-type galvanometer alloy resistor according to claim 1, characterized in that: The junction where each electrode (2) is connected to the bending part (11) is a bending portion (21) that bends gradually upwards.

4. A C-type galvanometer alloy resistor according to claim 1, characterized in that: The material of the resistance alloy part (1) is one of manganese copper, copper manganese tin, copper manganese nickel, Kanthal, or iron chromium aluminum alloy.

5. A C-type galvanometer alloy resistor according to claim 1, characterized in that: The material of each electrode (2) is oxygen-free copper TU1 material.

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