Pilot valve for flow path switching valve

Abstract

The invention discloses a pilot valve of a flow path switching valve. The pilot valve comprises a valve body, a valve base is arranged on the front side of an inner cavity of the valve body, a core iron is arranged on the rear side of the inner cavity of the valve body, a connector is formed in the valve base, a sliding block is arranged on the valve base in a sliding manner, the sliding block is connected with the core iron through a drag frame, and when the core iron moves front and back, the sliding block is driven to slide on the valve base to open or close the connector; a vertical through hole is formed in the front side of the drag frame, the sliding block is positioned in the through hole, and runner grooves are symmetrically formed in the sealing face side of the sliding seal of the sliding block and the valve base and the opposite side of the sealing face. According to the pilot valve, mounting of the sliding block is facilitated, meanwhile, the whole performance of a control valve can be improved, implementation is easy, operation is convenient, the production technology of the sliding block is not required to be changed, material investment is reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to a flow path switching valve used in the air-conditioning and refrigeration industry. Background technique [0002] The flow switching valve is an important part of the heat pump air conditioner, and is suitable for central and split air conditioners, etc. The action of the existing flow path switching valve is to use the high and low pressure difference in the system to switch the on-off state of the electromagnetic coil of the pilot valve to realize the conversion of the flow path of the main valve, and then realize the conversion of the refrigerant flow in the system. [0003] Such as figure 1 with figure 2 As shown, the pilot valve includes a valve body 2, a valve seat 21 is provided on the front side of the inner cavity of the valve body 2, and at least two ports are arranged side by side on the valve seat 21, and a slider 1 is slidably arranged on the valve seat 21, and the slider The block 1 is connected with the core...

AI Technical Summary

Problems solved by technology

It can be seen that the communication of the runner groove of the slider has a great influence on the reversing movement in the control valve, and directly affects the operation of the air conditioning adjustment system

[0004] However, the slider with the existing structure is difficult to ensure the stability of the commutation Unicom, and there are problems such as defective products due to the wrong installation direction of the slider.

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