Electronic expansion valve

Abstract

The invention discloses an electronic expansion valve, which comprises a casing (1), a magnet (2) and a screw rod (3); the electronic expansion valve also comprises a spindle (4) arranged in the casing, the outside of the spindle (4) is provided with a guide way (5), and a slide ring (6) is fitted on the guide way; one of the guide way (5) and the spindle (4) is connected with the screw rod (3) and rotates along with the screw rod (3), the other one is connected with the casing (1), and moreover, the guide way (5) is connected with the screw rod (3) or the casing (1) through a positioning part; and the slide ring (6) is connected with the spindle (4), can move along the axial direction of the spindle (4), and is fixed along the circumference of the spindle (4) in order to limit the rotation turns of the guide way (5) or the spindle (4). On the basis of guaranteeing the reliability of operation, the height of the valve body of the electronic expansion valve can be effectively reduced, and thereby the electronic expansion valve is miniaturized.

Description

technical field [0001] The invention relates to the technical field of fluid control components, in particular to an electronic expansion valve. Background technique [0002] The electronic expansion valve for air conditioner is composed of four main parts: stepping motor, screw mechanism, stopper part, valve needle and valve port flow regulating mechanism. The stopper part is composed of a fixed part and a movable part. The movable part is fixed on the magnet, and can rotate in the circumferential direction and move up and down axially with the magnet. The fixed part cooperates with the movable part, and its function is to limit the axial lifting stroke of the threaded mechanism and the valve needle, and prevent the threaded mechanism and the valve needle from excessively rising or falling, resulting in loss of flow regulation function. Electronic expansion valves for air conditioners are generally used on outdoor units of inverter air conditioners. In recent years, some h...

AI Technical Summary

Problems solved by technology

[0006] The stop rod 9'2 must be fixed on the magnet 2' and the screw rod 3', so as to drive the slip ring 6' to rotate around the guide rail 5'; since the stop rod 9'2 has a large axial dimension and there is no guide above it, therefore The rocking of magnet 2' will drive the stop bar 9'2 to shake. In order to prevent the stop bar 9'2 from interfering with the guide rail 5', a larger gap needs to be set between the stop bar 9'2 and the guide rail 5'. The radial size of the stopper component composed of the stopper rod 9'2, the guide rail 5', the slip ring 6' and the mandrel 4' is relatively large, so that it cannot be completely or mostly installed in the magnet cavity 2'1 of the magnet 2' In this way, the height of the entire valve body is relatively large, which is not conducive to the miniaturization of the electronic expansion valve.

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