Refrigerant Throttle Valve Rotor Magnet

Refrigerant throttle valves (electronic expansion valves) are primarily used in commercial/residential air conditioning systems, refrigeration equipment, and refrigerant pipelines. They dynamically regulate refrigerant flow by driving an internal rotor. As the core drive component, the rotor magnet's material, shape, and magnetic performance precision directly determine the sensitivity, stability, and energy efficiency of the entire air conditioning system's regulation.

Regarding magnet material, rotor magnets for refrigerant throttle valves are typically manufactured using injection-molded neodymium iron boron (NIB) technology. The advantages of injection-molded magnets include one-step molding for precise dimensions, high dimensional accuracy, and superior, uniform magnetic properties. To enhance mechanical strength and structural integrity, copper inserts can be embedded and molded as a single unit, strengthening the structure and facilitating seamless integration with the valve body's drive mechanism.

In terms of shape, refrigerant throttle valve rotor magnets are typically ring-shaped or hollow cylindrical, featuring 12, 16, or 24 poles.

The primary function of the rotor magnet is to form magnetic coupling with the stator coil, driving the rotor to rotate in microsteps at predetermined angles. This ultimately enables real-time control of refrigerant flow. Since electronic expansion valves require rapid and precise response, the rotor magnet must maintain a stable magnetic field during rotation. Failure to do so compromises valve sensitivity, leading to temperature control fluctuations or reduced system energy efficiency.

Key requirements for these magnets include dimensional accuracy, tolerance precision, concentricity, and magnetization width. This concludes the overview of rotor magnets for refrigerant throttle valves.