Alternating current electromagnetic valve

Abstract

The invention relates to an alternating current electromagnetic valve comprising a movable iron core, a stationary iron core and an electromagnetic coil. The movable iron core is arranged in a magnetic sleeve and slides under the action of magnetic force to open and close a valve pathway; the stationary iron core attracts the movable iron core and blocks the movable iron core to slide; the electromagnetic coil is arranged outside the magnetic sleeve; the end of the stationary iron core facing to the movable iron core is provided with an annular groove; and a shading ring is arranged in the annular groove. The alternating current electromagnetic valve is characterized in that the shading ring is made of soft aluminum material, and the annular groove is in a ladder-shaped structure which is gradually widened from an opening to the inside in the direction of the cross section. The shading ring made of the soft aluminum material is arranged in the groove after being deformed by external force in the installation process, therefore, the structure ensures that the shading ring can not easily fall off, is suitable for normally working in a vibration environment and ensures the reliability of a product.

Description

technical field [0001] The invention relates to an AC solenoid valve, in particular to a sub-magnetic ring in the solenoid valve and its installation structure, which is mainly used for the control of the switch of the refrigerant flow path and the change of the flow direction of the refrigerant in the air-conditioning and refrigeration system. Background technique [0002] AC solenoid valves are commonly used in air-conditioning and refrigeration systems, and their main functions are: ① used as a one-way flow control valve to control the opening and closing of the flow path in the refrigeration system; ② used as a pilot valve and the main valve to form an electromagnetic reversing valve to Change the direction of refrigerant flow. The prior art will be described below by taking an electromagnetic reversing valve as an example. [0003] The structure of the electromagnetic reversing valve in the prior art is as follows: figure 1 As shown, it consists of two parts, the pilo...

AI Technical Summary

Problems solved by technology

However, the working environment of the air conditioner is relatively complicated, and the solenoid valve may work for a long time in a vibrating environment, so the magnetic sub-ring in the groove of the rectangular cross-section of the static iron core is prone to fall off or crack, resulting in loss of efficacy and system noise, and fall off The material of the sub-magnetic ring stays in the pilot valve, so that the electromagnetic control valve cannot be reversed and the system cannot work normally

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