Explosion-proof coil, electronic expansion valve and machining method of explosion-proof coil

Abstract

The invention discloses an explosion-proof coil which comprises a winding (1) and a winding shell (2). A cable mounting part (3) and a circuit board (4) are arranged on the winding shell (2). A leading wire (5) is installed on the circuit board (4). A protection sleeve (6) is arranged outside the leading wire (5). A housing (7) is further fixedly connected outside the winding shell (2). The top end of the housing (7) is higher than the bottom end of the protection sleeve (6). The housing (7), the cable mounting part (3), the circuit board (4), the leading wire (5) and part of the protection sleeve (6) are formed into a whole through encapsulation. Compared with the prior art, encapsulation of the bottom end of the protection sleeve (6) is achieved through the explosion-proof coil, the electric insulation performance of the joint of the circuit board (4) is guaranteed, the explosion-proof performance of the explosion-proof coil is improved, the explosion-proof coil is made to meet the national certification requirements for explosion-proof coils, and meanwhile, market requirements for the explosion-proof coil of an electronic expansion valve can also be met. The invention further provides the electronic expansion valve with the explosion-proof coil applied and a machining method of the explosion-proof coil.

Description

technical field [0001] The invention relates to the technical field of refrigeration equipment, in particular to an explosion-proof coil, an electronic expansion valve and a processing method for the explosion-proof coil. Background technique [0002] Please refer to figure 1 and figure 2 , figure 1 It is a structural schematic diagram of a coil of an electronic expansion valve in the prior art, figure 2 for figure 1 Schematic diagram of the structure of the middle casing. [0003] The coil includes a winding 1', a winding housing 2', a cable installation part 3' located outside the winding housing 2', and a circuit board 4'. The cable installation part 3' is connected with a lead wire 5' and the lead wire 5' is externally arranged. There is a sheath 6', and a casing 7' is fixedly connected to the outside of the winding casing 2'. combine figure 1 and figure 2 , the casing 7' is a semi-enclosed shell structure with an upper end and an inner opening, and its height...

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Problems solved by technology

[0005] However, the height of the above-mentioned casing 7' is relatively low, and the sheath 6' of the lead wire 5' is arranged above the casing 7', that is, the casing 7' does not encapsulate the sheath 6' in it, and the electronic The explosion-proof coil of the expansion valve requires the sheath 6' potting distance to be at least 5mm. Therefore, the coil structure cannot meet the certification requirements of the explosion-proof coil, nor can it meet the market requirements for the explosion-proof coil of the electronic expansion valve.

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