Expansion valve

Abstract

The invention discloses an expansion valve. The expansion valve comprises a lead screw. The lead screw is assembled onto an internal thread of a threaded sleeve nut. The lower end of the lead screw isconnected with a valve needle. The valve needle is mounted on a valve port. The upper end of the lead screw is connected with a rotor insert sheet. The upper end of the valve port is sleeved with thethreaded sleeve nut. The upper end of the outer wall of the threaded sleeve nut is sleeved with a stop ring. The top of the threaded sleeve nut is provided with a check ring. A rotor and the lead screw are connected through a shaft. The outer wall of the threaded sleeve nut is provided with an external thread for allowing the stop ring to rotate. The upper end of the threaded sleeve nut is provided with a groove matched with the outer ring surface of the check ring. The inner ring surface of the check ring is provided with a protrusion. The outer ring surface of the check ring is provided with a check protruding block. The check protruding block and the protrusion on the inner ring surface are arranged in a back-to-back mode. By means of the technical scheme, the expansion valve is simpleand reliable in structure; the product cost can be lowered; the machining difficulty can be reduced; and the output time can be saved.

Description

technical field [0001] The invention relates to an expansion valve, which is suitable for the fields of refrigeration, air conditioning and heat pumps, and realizes automatic regulation of refrigerant flow. Background technique [0002] The temperature-sensing mechanism of the existing expansion valve used in the refrigeration cycle is built in to reduce noise and achieve rapid cooling or heating. The stop ring on the existing expansion valve is when the motor is working, the rotor rotates with the stop ring, and when it stops , due to inertia, the stop ring cannot stop running immediately, and it is prone to collisions, which will lead to the service life of the stop ring over time. In addition, the stop ring and the wire sleeve nut are made of metal, which is difficult to manufacture and shape, with many processes and large dimensional errors , so the pass rate is low, the noise is large during use, and the cost is high. Contents of the invention [0003] The task of th...

AI Technical Summary

Problems solved by technology

[0002] The temperature-sensing mechanism of the existing expansion valve used in the refrigeration cycle is built in to reduce noise and achieve rapid cooling or heating. The stop ring on the existing expansion valve is when the motor is working, the rotor rotates with the stop ring, and when it stops , due to inertia, the stop ring cannot stop running immediately, and it is prone to collisions, which will lead to the service life of the stop ring over time. In addition, the stop ring and the wire sleeve nut are made of metal, which is difficult to manufacture and shape, with many processes and large dimensional errors , so the pass rate is low, the noise is large during use, and the cost is high

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