| 摘要 |
<p>A centrifugal blower (10) and volute (20) in which the radial extent of the volute is controlled to keep it substantially (e.g., ±20 %) constant up to the connection to the diffuser (22). The cross-sectional area of the volute increases linearly in the direction of impeller (10) rotation to accommodate increasing airflow volume. Airflow exits the volute and enters a diffuser which rapidly opens (increases in cross-sectional area) by increasing its radial extent. The diffuser may be attached to a source of air resistance such as a heat exchanger (26).</p> |
