an electric valve

Abstract

The invention discloses an electric valve. The electric valve comprises a valve base, a valve base core and a valve core, wherein the valve base core is fixed in an inner cavity of the valve base, and is provided with a flow adjusting groove in the peripheral wall; the valve core is arranged in a core cavity of the valve base core; the lower end of the valve core has a guide section greater than a valve core body in diameter; the guide section is in clearance fit with the valve base core; and the ratio of the area of a throttle channel between the guide section and the valve base core to the circulating area of a valve port of the valve base is 1.5-9%. When the valve core is slightly deviated from the valve port, the balance of upper and lower pressure of the guide section of the valve core is helpful to be accelerated, so that the difference of upper and lower pressure of the guide section of the valve core is reduced, the pressure different force suffered by the guide section of the valve core is reduced, the axial resistance of the valve core is reduced, the valve core is convenient to be lifted, the increment of the motor size caused by overcoming greater axial resistance on the valve core can be prevented, and the miniaturization of the valve body is facilitated.

Description

technical field [0001] The invention relates to the technical field of fluid control components, in particular to an electric valve. Background technique [0002] In air conditioners, refrigerators, heat pump water heaters and various refrigeration and heating equipment, or other occasions that need to regulate fluid flow, flow regulating valves are usually used, and electric valves are one of the flow regulating valves. [0003] The electric valve usually includes a valve seat, which is provided with a valve port, a first port and a second port, and the opening and closing of the valve port controls the connection or disconnection of the first port and the second port; the valve seat is provided with a valve seat The core, the peripheral wall of the valve seat core is provided with a flow regulating groove, and the flow rate of the fluid circulating between the first interface and the second interface can be adjusted through the opening of the flow regulating groove. [00...

AI Technical Summary

Problems solved by technology

[0007] Due to the large diameter of the valve port of the electric valve, when the valve core is slightly lifted away from the valve port, the pressure at the lower end of the valve core guide section drops rapidly. Since the valve core guide section cooperates with the valve seat core in a small gap, there is throttling at this time, which cannot Timely balance will lead to the formation of pressure difference between the upper and lower sides of the guide section of the spool, which is the main cause of the axial resistance of the spool. In order to overcome the axial resistance of the spool and lift the spool to open the valve port smoothly, it is necessary to increase the size of the motor. Conducive to the miniaturization of the valve body

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