Nozzle holder and nozzle of holographic restriction choke

The invention discloses a nozzle holder and nozzle of a holographic restriction choke. The nozzle holder comprises a holder body, and a cavity is formed in the holder body. A gas outlet is formed in one end of the holder body. The gas outlet communicates with the cavity. Steps are arranged on the side wall, close to the gas outlet, of the cavity. The steps are matched with the outer walls of nozzle wicks of the restriction choke. The cavity can contain the multiple nozzle wicks, and the nozzle wicks can be sequentially arranged in a sleeving mode from the position close to the gas outlet to the position far away from the gas outlet. According to the nozzle holder, the nozzle wicks can be replaced conveniently, and working efficiency is improved. 本发明公开了全息式节流器的喷嘴座及喷嘴，所述喷嘴座包括座体，所述座体内设有空腔，所述座体端设有出气口，所述出气口与所述空腔连通，所述空腔靠近所述出气口的侧壁上设有台阶，所述台阶与节流器的喷嘴芯的外壁相匹配，所述空腔内可容纳多个所述喷嘴芯，且多个所述喷嘴芯可从靠近所述出气口向远离所述出气口的方向依次套设。本发明所述的喷嘴座方便更换喷嘴芯，提高工作效率。