INTRODUCTION

SANHUA Automotive’s EXV (Electronic Expansion Valve) was designed to replace conventional mechanical TXV (Thermal Expansion Valve) devices. The new EXV which can be controlled via a LIN or PWM signal is available for R134a, R1234yf and R744 refrigerant systems.

SAE J2765 MAC testing has proven that a SANHUA Automotive EXV can improve the refrigerant system COP of a typical passenger vehicle by more than 10% when tested at various points along the test matrix. Studies have also indicated that an EXV can be especially effective in maximizing internal heat exchanger system performances. This EXV can precisely control compressor inlet superheat to achieve higher system efficiency by optimizing evaporator and IHX heat transfer more effectively than a conventional TXV. This superior, responsive and stable superheat control reduces a/c compressor loads which results in improved fuel economy, compressor reliability and refrigerant system NVH quality. EXV quality and durability are enhanced by self-lubricate design characteristics and the use of stainless material.