Air conditioner indoor unit
By setting a flow channel on the volute tongue to guide the return airflow to the air inlet duct, the problems of pressure resistance and air intake efficiency of cross-flow fans under high back pressure conditions are solved, achieving noise reduction and performance improvement.
CN224534365UActive Publication Date: 2026-07-21QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
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Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- QINGDAO HISENSE HITACHI AIR CONDITIONING SYST
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-21
AI Technical Summary
Technical Problem
Cross-flow fans have poor pressure resistance under high back pressure conditions, low air intake efficiency and high noise. Existing technology has limited improvement, and the direct supply of air to the impeller can cause impact noise and reduce sound quality.
Method used
A flow channel is set on the volute tongue to guide part of the return airflow to the air intake duct, reducing the return flow of the eccentric vortex, increasing the effective working area of the impeller, and reducing airflow impact through the design of the gradually expanding flow channel, thereby improving intake efficiency.
Benefits of technology
Improve the pressure resistance and air intake efficiency of cross-flow fans, reduce noise, maintain stable air volume, and enhance overall performance.
✦ Generated by Eureka AI based on patent content.
Smart Images
Figure CN224534365U_ABST
Abstract
The application discloses an air conditioner indoor unit, and belongs to the technical field of air conditioners. The air conditioner indoor unit comprises a shell, an impeller, a heat exchanger, a volute and a volute tongue. The volute tongue is arranged in the shell and forms an air inlet air duct between the volute tongue and the shell. The volute tongue is connected with the volute to form an impeller mounting cavity and an air outlet air duct. The impeller is arranged at the impeller mounting cavity. Under the drive of the impeller, air sequentially passes through the air inlet air duct and the impeller mounting cavity to form an outlet airflow. The outlet airflow comprises a backflow airflow guided by the volute tongue to flow to the impeller and an air outlet airflow flowing to the air outlet air duct. The air outlet airflow exchanges heat with the heat exchanger. A flow guiding channel is arranged at the volute tongue, and the flow guiding channel is used for guiding part of the backflow airflow to the air inlet air duct. The air conditioner indoor unit can improve the pressure resistance of the cross-flow fan and improve the air inlet efficiency.
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