压缩机
By installing a diffuser in the secondary volute of the compressor and adjusting the refrigerant flow path width to match load changes, the surge problem of centrifugal compressors when the user load decreases is solved, thus improving the safety and lifespan of the equipment.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
- Filing Date
- 2025-07-31
- Publication Date
- 2026-07-17
AI Technical Summary
Existing centrifugal compressors cannot reduce refrigerant flow when user load decreases, leading to severe surge and affecting compressor safety and lifespan.
A diffuser is installed in the secondary volute of the compressor, including a drive component, a transmission component, and a movable adjustment component. The drive component drives the movable adjustment component to move within the flow chamber, adjusting the width of the refrigerant flow channel to match load changes and reduce refrigerant flow.
It effectively reduces compressor surge, expands the compressor's operating range, and improves equipment safety and lifespan.
Smart Images
Figure CN224515421U_ABST
Abstract
Claims
1. A compressor characterized by, include: The compressor housing includes a secondary volute; a mounting portion is formed within the secondary volute, a mounting chamber is formed on one side of the mounting portion, and a flow chamber and a pressurization chamber are provided on the other side of the mounting portion. An impeller assembly includes a secondary impeller rotatably connected to the mounting portion; the output end of the secondary impeller communicates with the flow chamber; wherein a diffuser is further provided within the secondary volute, the diffuser comprising: The driving component is mounted on the secondary volute. A transmission component is disposed within the mounting cavity and connected to the output end of the drive component; A movable adjusting member, which is connected to the transmission member, is configured to be movably connected to the flow chamber along the axial direction of the secondary impeller under the action of the drive member.
2. The compressor according to claim 1, characterized in that, The movable adjusting component is annular and is movably connected to the flow chamber along the axial direction of the secondary impeller. A mounting hole is formed on the mounting part, and the secondary impeller is rotatably connected to the mounting hole.
3. The compressor according to claim 2, characterized in that, The movable adjusting member has multiple connecting parts arranged circumferentially along the side of the movable adjusting part near the transmission member. The mounting part has a connecting hole extending axially along the secondary impeller at the corresponding position. The connecting part passes through the corresponding connecting hole and connects to the transmission member.
4. The compressor according to claim 1, characterized in that, An annular receiving recess is formed on the side wall of the mounting part that contacts the flow chamber, and the movable adjusting member is at least partially located within the receiving recess.
5. The compressor according to claim 1, characterized in that, The secondary volute is provided with an input channel and an output channel. The input channel is connected to the input end of the secondary impeller, and the output channel is connected to the output end of the secondary impeller through the pressurization chamber and the flow chamber.
6. The compressor according to claim 5, characterized in that, The transmission component is annular and is located radially along the secondary volute, on the outside of the input channel.
7. The compressor according to claim 1, characterized in that, The drive component is fixed to the secondary volute by a support base. The output end of the drive component is provided with a drive shaft extending into the mounting cavity. A swing link is provided between the drive shaft and the transmission component. The first end of the swing link is fixedly connected to the drive shaft, and the second end of the swing link is rotatably connected to the outer wall of the transmission component.
8. The compressor according to claim 7, characterized in that, The outer wall of the transmission component has a radially extending positioning hole, the second end of the swing linkage is provided with a positioning shaft, the bottom of the positioning shaft is provided with a spherical positioning part, and the spherical positioning part is rotatably connected in the positioning hole.
9. The compressor according to claim 7, characterized in that, The outer wall of the transmission component is provided with a plurality of movable grooves spaced apart along the circumference of the transmission component. The connecting part is movably connected to the movable grooves through a limiting part, and the limiting part is provided with a rolling bearing part.
10. A compressor characterized by, include: The compressor housing includes a motor secondary volute; a mounting portion is formed within the secondary volute, a mounting chamber is formed on one side of the mounting portion, and a flow chamber and a pressurization chamber are provided on the other side of the mounting portion. An impeller assembly includes a secondary impeller rotatably connected to the mounting portion; the output end of the secondary impeller communicates with the flow chamber; wherein a diffuser is further provided inside the secondary volute, the diffuser being configured to adjust the width of the refrigerant flow channel within the flow chamber to regulate the refrigerant flow.