2results about How to "Flow restriction" patented technology

This invention relates to a compound containing a pyranoquinoxaline structure and its applications, belonging to the field of organic electroluminescent materials technology. The compound containing the pyranoquinoxaline structure has the following structural formula: Ar is selected from aromatic hydrocarbon groups with 6-30 carbon atoms (deuterated or undeuterated) and heteroaryl groups with 5-30 carbon atoms (deuterated or undeuterated), wherein the heteroatoms in the heteroaryl group are selected from N, S, and O. The compound containing the pyranoquinoxaline structure is used in organic electroluminescent devices. The compound containing the pyranoquinoxaline structure of this invention, used as a host material and electron transport material in organic electroluminescent devices, can restrict carrier flow within the light-emitting layer, providing better device performance, including lower driving voltage, higher current efficiency, and extended lifespan. It significantly improves device lifespan and has good application effects in OLED light-emitting devices, showing promising industrialization prospects.

The utility model discloses a kind of filtering and impurity removing equipment of printing ink waste liquid, including filter shell, and it is installed three groups of staggered filter assembly and collection assembly by support frame. Filter assembly contains outer filter ring, inner filter ring, inner filter screen etc., and large particle impurities are filtered through inner filter screen, and impurities are cleaned by scraping rod. Collection assembly is formed by outer filter screen etc., and is used to collect impurities. Driving shaft is rotated by connecting ring, main shaft drive driving ring. Guiding ring guides waste liquid flow, and inner filter ring controls liquid flow. Sealing structure is arranged between driving shaft and infusion tube. The equipment solves the problems of low filtering efficiency, impurity blockage, inconvenience of collection and processing, poor liquid flow and poor driving sealing of traditional equipment, realizes efficient filtering and impurity removal of printing ink waste liquid, and meets the needs of environmental protection and resource recovery.