公开(公告)号：US20220290692A1

公开(公告)日：2022-09-15

申请号：US17198130

申请日：2021-03-10

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Ryan HUTHMACHER

IPC: F04D29/58 ,  F04D29/44 ,  F04D29/68

Abstract: A centrifugal compressor for a chiller includes an impeller, a motor, a diffuser, and at least one injection port. The impeller is attached to a shaft rotatable about a rotation axis. The motor is arranged and configured to rotate the shaft in order to rotate the impeller. The diffuser is disposed downstream from the impeller. The at least one injection port is located within the diffuser. The at least one injection port is configured and arranged to supply liquid refrigerant into the diffuser from a condenser or an economizer of the chiller.

公开(公告)号：US20250052258A1

公开(公告)日：2025-02-13

申请号：US18928610

申请日：2024-10-28

Applicant: DAIKIN INDUSTRIES, LTD.

Inventor： Ryan HUTHMACHER

IPC: F04D29/58 ,  F04D29/44 ,  F04D29/68 ,  F25B1/053 ,  F25B1/10 ,  F25B31/00

Abstract: A two stage chiller includes first and second stage centrifugal compressors, at least one motor, a return channel flow path, and a plurality of injection ports. The first and second stage centrifugal compressors include first and second impellers, and first and second diffusers downstream from the first and second impellers. The at least one motor rotates the first impeller and the second impeller. The return channel flow path connects the first diffuser to the second impeller. The plurality of injection ports are located circumferentially around the second diffuser and within at least one of the first diffuser, and the return channel flow path. The plurality of injection ports located within the second diffuser are downstream of the second upstream edge of the second diffuser to deliver liquid refrigerant to the second diffuser.