Abstract:In order to realize the lightweight design of large capacity fourway valve, combined with its structure characteristics and operation conditions, the finite element analysis model under ultimate pressure resistant working condition was established.Through the pressure blasting strength experiment, the correctness of the finite element model and strength analysis was verified.On this basis, the lightweight design of the fourway valve was carried out based on the theory of dimension optimization, and simulation analysis of compressive strength and experimental verification of the optimized model were carried out until meeting experimental specification for compressive strength of fourway valve.The results show that the strength of the lightweight designed fourway valve structure meets the specification requirements, and the stress distribution is uniform.The valve body quality is reduced by 14.07%,running up to reduce quality and save cost,and provide convenience for the onsite installation of airconditioning units,and improve the space layout of air conditioners.