Y0i series electronic expansion valve is mainly used in household frequency conversion system (refrigeration, air conditioning and heat pump system) to realize the automatic regulation of refrigeration flow, so that the system can operate under the best working condition, achieve the purpose of rapid refrigeration, accurate temperature control, energy saving, etc., and also used in other control (such as pipeline pressure control, etc.). The valve is reversible and can realize automatic flow control in the state of refrigeration and heating