Electronic expansion valve

Abstract

The invention discloses an electronic expansion valve. The electronic expansion valve is characterized in that a stopping part comprises a core shaft (61), a spring guide rail (62) and a sliding ring (63), wherein the core shaft (61) is fixed relative to a valve seat (1); the spring guide rail (62) is sheathed at the outer part of the core shaft (61); the sliding ring (63) is matched with the spring guide rail (62); one end of the sliding ring (63) extends out to form a stopping rod (64); the top part of a magnet (3) is provided with a stopping hole (31a); the stopping rod (64) penetrates through the stopping hole (31a), and when the sliding ring (63) is positioned at an upper stopping position and a lower stopping position, the stopping rod (64) is respectively retained in the stopping hole (31a). The electronic expansion valve disclosed by the invention has the advantages that due to the structural design, on one hand, the quantity of parts can be reduced, the assembling process of the stopping rod can be simplified, and the working reliability can be improved; on the other hand, the radial size of the magnet can be reduced, so that the cost of materials can be saved and the miniaturization of a product can be realized.

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] In the technical field of refrigeration and heating, the electronic expansion valve is the refrigerant flow control part of the refrigeration and heating equipment. flow. [0003] In the prior art, the Chinese patent application publication number "CN102454819A" discloses an electronic expansion valve, specifically, please refer to figure 1 , figure 1 It is a structural schematic diagram of the electronic expansion valve in the prior art. [0004] Such as figure 1 As shown, the electronic expansion valve includes a valve seat 1' and a casing 2', and the casing 2' is fixedly supported on the valve seat 1', so that the relative position of the casing 2' and the valve seat 1' is fixed; the inside of the casing 2' A rotatable magnet 3' is provided, and the magnet 3' is fixedly connected with a screw 4'...

AI Technical Summary

Problems solved by technology

[0007] First, the stop rod 6'4 is connected to the inner wall of the connecting seat 3'1, and because it is assembled inside the magnet 3', the assembly process is more difficult and the assembly cost is higher; in addition, the stop rod 6'4 The reliability of the connection is also low. After working for a period of time, the stop rod 6'4 is prone to fall off;

[0008] Second, in order to cooperate with the stop rod 6'4, the protruding part 6'3a of the slip ring 6'3 needs to protrude a sufficient length in the radial direction, and at the same time, it must be considered that it cannot be in contact with the inner wall of the magnet 3'. Interference occurs, so the magnet 3' is required to have a larger radial dimension, which increases the material cost on the one hand, and is not conducive to the miniaturization of the product on the other hand

Images