公开(公告)号：US20230138965A1

公开(公告)日：2023-05-04

申请号：US17917535

申请日：2021-04-06

申请人： Johnson Controls Air Conditioning and Refrigeration (Wuxi) Co., Ltd. ,  Johnson Controls Tyco IP Holdings LLP

发明人： Shengmei Yang ,  Li Wang ,  Kun Lin ,  Zhengxiang Yu

IPC分类号： F04C29/06 ,  F04C18/16 ,  F04C29/12 ,  F04C28/28 ,  F04C29/02 ,  F25B1/047 ,  F25B31/00 ,  F25B49/02

摘要： Disclosed is a screw compressor (100), comprising a screw compressor housing (101), a discharge cavity (113), at least one silencing channel, and at least one adjustment piston, wherein the discharge cavity (113) is defined by at least one part of the screw compressor housing (101); the at least one part of the screw compressor housing (101) defining the discharge cavity (113) forms a wall of the discharge cavity (113); at least one hole is provided in the wall of the discharge cavity (113); the at least one adjustment piston can be inserted into the at least one hole and move therein; the at least one silencing channel is formed by the at least one hole and the at least one adjustment piston, and the at least one silencing channel is in fluid communication with the discharge cavity (113); and the position of the at least one adjustment piston in the at least one hole determines the silencing length of the at least one silencing channel.

公开(公告)号：US20220268294A1

公开(公告)日：2022-08-25

申请号：US17674678

申请日：2022-02-17

申请人： York Guangzhou Air Conditioning and Refrigeration Co., Ltd. ,  Johnson Controls Tyco IP Holdings LLP

发明人： Shifeng Feng ,  Xiaokui Ma ,  Li Wang

IPC分类号： F04D29/28 ,  F04D17/08

摘要： The present application discloses an impeller for a centrifugal fan and a centrifugal fan. The impeller comprises a support member and several vanes. The support member has an inner wall that defines a hollow portion. The several vanes are arranged inside the hollow portion, each of the several vanes is connected with the inner wall and extends along the axial direction of the support member, and the several vanes are arranged along the circumferential direction of the support member. Each of the several vanes is bent and comprises a front edge, a tail edge, a convex suction surface, and a concave pressure surface, the suction surface and the pressure surface are arranged to oppose each other, and the front edge and the tail edge are arranged to oppose each other, wherein the tail edge is connected with the inner wall of the support member, and wherein several protrusions are provided on the suction surface, and the several protrusions are arranged to be close to the front edge. The protrusions can regulate the flow of a fluid immediately when the fluid contacts the vanes. During the flow regulation process, a large vortex in the fluid can be divided into several small vortices. Such small vortices have smaller friction resistance, and the kinetic energy dissipated from the motion of the small vortices themselves can be partially cancelled out, thereby reducing the noise of the impeller and improving the performance of the centrifugal fan.