Electric valve

Abstract

The invention discloses an electric valve. The electric valve is provided with a shell and a valve seat which are connected to form a valve cavity, the valve seat is provided with an axial through hole, a nut, a lead screw and a valve needle part are arranged in the valve cavity, the nut and the lead screw are in thread fit, the valve needle part rotates along with the lead screw so as to vertically move along the through hole, a sleeve is further arranged in the shell, the top end of the valve seat and the lower end of the sleeve are coaxially connected, and the nut and the sleeve are coaxially positioned. The nut in the valve cavity of the electric valve is indirectly connected with the valve seat through the sleeve, and the sleeve is a thin-walled part, less in required materials, simple in structure and convenient to process. Compared with the prior art, the electric valve has the advantages that after the sleeve is arranged, a through hole for directly accommodating the nut is not needed to be processed on the valve seat when the electric valve of the structure is processed, so that the height of the valve seat can be decreased, turning amount of the valve seat is reduced, and material cost of the valve seat is greatly lowered; and processing difficulty of the valve seat is reduced, and accordingly working efficiency of the valve seat is improved.

Description

technical field [0001] The invention relates to the field of refrigeration cycles, in particular to an electric valve. Background technique [0002] In the refrigeration cycle system, an electric valve is usually set between the outdoor heat exchanger and the indoor heat exchanger. When in the cooling mode, the electric valve will throttle the refrigerant from the outdoor heat exchanger and direct it to the indoor heat exchanger; when in the heating mode, it will direct the refrigerant from the indoor heat exchanger to the outdoor heat exchanger after throttling and reducing the pressure . [0003] Please refer to figure 1 , figure 1 It is a schematic diagram of the structure of a typical electric valve. [0004] The electric valve has a casing 11 and a valve seat 12. A rotor device, a screw rod 14, and a nut 15 are arranged inside the casing 11. The upper end of the screw rod 14 is connected to the magnetic rotor 13 of the rotor device, and the lower end of the screw ro...

AI Technical Summary

Problems solved by technology

[0007] It can be seen from the above that, during the processing of the valve seat 12, in order to process the first through hole for the nut 15 to be pressed in and to form an upward boss structure, the volume of the cut material is relatively large, resulting in waste of material and increased production. cost, and the structure of the valve seat 12 is complicated, the cutting amount is large, and the processing efficiency is low

In order to improve the corrosion resistance of the valve body and improve welding reliability, when the valve seat 12 is made of stainless steel, the processing difficulty and cost of the valve seat 12 are even higher

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