Electromagnetic coil and its skeleton

Abstract

The invention discloses an electromagnetic coil and a framework thereof. The disclosed framework comprises a wound core and two blade edge-shaped parts respectively arranged at both ends of the wound core; reverse end faces of the two blade edge-shaped parts are respectively provided with an annular boss; the outer edge of at least one annular boss is provided with a gap part. The framework is provided with the gap part, and the gap part has an exhaust and / or positioning function, wherein the good combination of an encapsulating material and the framework can be ensured by the exhaust function, and therefore, the reliable insulating property of the electromagnetic coil is ensured; the electromagnetic coil can be prevented from deviating in placement location, and therefore, an encapsulated layer is uniform and consistent in thickness.

Description

technical field [0001] The invention relates to the technical field of valve bodies, in particular to an electromagnetic coil and its skeleton. Background technique [0002] In air conditioners, compressors, refrigerators, water heaters and other products, there are generally valve products such as solenoid valves and four-way reversing valves that control the flow of gas or liquid, and solenoid coils are important components that control the on-off of such valve products. , the safety and reliability of its electrical performance directly affects the performance of the valve product. [0003] Please refer to Figure 1-3 , figure 1 is a cross-sectional view of a typical electromagnetic coil skeleton; figure 2 for figure 1 Schematic diagram of the three-dimensional structure of the middle skeleton; image 3 for figure 1 Schematic diagram of the structure of the skeleton in which the coil is wound and then encapsulated. [0004] The skeleton 1 of the electromagnetic ...

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Problems solved by technology

[0008] First, when encapsulating, a closed cavity is formed inside after the mold and the skeleton are matched. After the melted encapsulating material enters the cavity of the mold from the injection port, the gas inside the cavity of the mold is forced to compress a large amount due to the lack of a discharge path. Heat release, the temperature in the mold cavity rises rapidly, and the outer edge of the skeleton is thin and easy to be burnt, resulting in the inability of the encapsulating material and the edge of the skeleton to fully fuse, so that a dense sealing layer cannot be formed to prevent external moisture from penetrating, and eventually the electromagnetic coil loses reliability. failure of insulation

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