Birotor impeller structure for improving whole-pressure efficiency of cross-flow fan

Abstract

The invention provides a birotor impeller structure for improving whole-pressure efficiency of a cross-flow fan. According to the birotor impeller structure for improving the whole-pressure efficiency of the cross-flow fan, on the basis of an existing single-rotor scheme of the cross-flow fan, a one-level rotor is added therein so as to constitute the birotor impeller structure. The birotor impeller structure for improving the whole-pressure efficiency of the cross-flow fan comprises a shell and a birotor impeller, wherein the shell comprises a volute, a worm tongue and a side plate; the birotor impeller is mounted inside the volute on the shell; the birotor impeller comprises an outer ring rotor impeller and an inner ring rotor impeller; the outer ring rotor impeller is composed of outer ring rotor blades; and the inner ring rotor impeller is composed of inner ring rotor blades. The birotor impeller structure has the benefits as follows: on the premise of guaranteeing that the flow is unchanged, the birotor impeller structure has the characteristics of improving the whole-pressure efficiency of the cross-flow fan, further achieving an energy-saving effect, and meanwhile not changing the whole compactness of the cross-flow fan.

Description

technical field [0001] The invention belongs to the field of heat insulation and air conditioning machinery, in particular to a double-rotor impeller structure for improving the total pressure efficiency of a cross-flow fan. Background technique [0002] At the entrance of large shopping malls or indoor public places, air curtain or hot air curtain machinery is often installed on the top of the gate. This kind of machine can play the functions of heat insulation, insect prevention, heating, dust prevention, fresh keeping and so on. In the air curtain and the hot air curtain, the part that does work on the airflow is the impeller structure of the cross-flow fan. The unique structure of the cross-flow fan will cause an eccentric vortex to control the entire flow field inside it. Due to the existence of the eccentric vortex, a backflow phenomenon will occur at the outlet of the impeller, so that the flow and efficiency of the air curtain and hot air curtain will be seriously a...

AI Technical Summary

Problems solved by technology

When the fan is running, the air flow is added twice by the impeller, but due to the existence of the eccentric vortex and the boundary layer separation vortex, the number of blades that can be added to the impeller part is limited.

Therefore, the flow and head required by the fan cannot meet the ideal requirements

Images