Electronic expansion valve

Abstract

An electronic expansion valve comprises a housing (1), a magnet (2) and a lead screw (3). The electronic expansion valve further includes a mandrel (4) provided in the housing, a guide rail (5) provided on the outer side of the mandrel (4), and a slip-ring (6) matched up with the guide rail (5). One of the guide rail (5) and the mandrel (4) is connected with the lead screw (3) and rotates with the lead screw (3), and the other is connected with the housing (1). The guide rail (5) is connected with the lead screw (3) or the housing (1) by a positioning component. The slip-ring (6) is movably connected with the mandrel (4) along the axial direction of the mandrel (4) and is fixed to the circumference of the mandrel (4) to restrict the number of turns of the guide rail (5) or the mandrel (4). The electronic expansion valve enables effective reduction of the height of the valve body on the basis of the operational reliability.

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 component, 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 circumferentially and lift 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 high-end air conditione...

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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