Patent ID: 8770225

Claim:
An end cover for fitting with a valve body of a main valve of a four-way reversing valve, the end cover comprising a larger diameter section and a smaller diameter section sequentially provided in an axial direction, wherein an outer periphery of the larger diameter section of the end cover is adapted to be tightly connected with an end portion of the valve body, and an end portion of the smaller diameter section of the end cover is adapted to be fitted with a piston of the main valve so as to define an operating position of the piston, and the larger diameter section of the end cover has a frustum shape with a larger outer end and smaller inner end, wherein the larger outer end of the larger diameter section of the end cover has a radial dimension greater than an inner diameter of the end portion of the valve body, and the smaller inner end of the larger diameter section of the end cover has a radial dimension smaller than the inner diameter of the end portion of the valve body; and the larger diameter section of the end cover is configured to be subjected to a radially inward extrusion force during assembly of the end cover onto the valve body and to be foldingly deformed inwardly as a whole around the smaller diameter end of the end cover under the action of the radially inward extrusion force, so as to abut against an inner wall of the valve body.