Electronic expansion valve

Abstract

The invention provides an electronic expansion valve. The electronic expansion valve comprises a valve seat, a core body assembly, a lead screw, a nut, a support frame and a driving mechanism, whereinthe valve seat is provided with a valve seat cavity and a valve port; the core body assembly is at least partially arranged on the valve seat cavity movably; the lead screw and the nut are in coordination through threads, and the nut is fixedly connected with the core body assembly; the support frame and the valve seat are fixedly connected directly or indirectly, a coordination slot is formed inthe support frame, the nut is provided with a protruding part, and the protruding part is in coordination with the coordination slot; and the driving mechanism comprises a rotor and a coil; the rotorand the lead screw are fixedly connected; the lead screw is driven by the rotor through the coil to rotate; under the threaded coordination action of the nut and the lead screw and the coordination action of the nut and the coordination slot, the nut can move in the axial direction and does not rotate in the circumferential direction; and the core body assembly can get close to or keep away fromthe valve port under the drive of the nut. The problem that an electronic expansion valve in the prior is high in production cost can be effectively solved by applying the technical solution of the invention.

Description

technical field [0001] The invention relates to the technical field of refrigeration control, in particular to an electronic expansion valve. Background technique [0002] In the current electronic expansion valve structure, it is composed of a driving part (coil, rotor) and a flow regulating part (nut, screw, shell, valve needle, valve seat, valve seat core, connecting pipe, etc.). Wherein, the rotor is driven and connected with the screw rod, the nut is fixed on the valve seat and screwed with the screw rod, and the valve needle is fixedly connected with the screw rod. In this way, when the rotor rotates under the driving action of the external coil, the rotor can drive the screw to rotate along its axis. At the same time, because the screw is threaded with the nut, the screw can also move along its axis while rotating along its axis. Since the valve needle is fixedly connected with the screw rod, the valve needle can move along the axis of the screw rod driven by the scr...

AI Technical Summary

Problems solved by technology

Although the above-mentioned structure can realize the function of adjusting the flow rate, since the screw rod rotates along its axis and moves axially along its axis, although the above-mentioned structure can realize the function of adjusting the flow rate, since the rotor moves up and down together with the screw rod, the The coil does not move. As th

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