Air duct and fresh air fan

Abstract

The application provides an air duct and a fresh air fan. The air duct comprises an outer pipe and an inner pipe. The outer pipe is through and fixedly arranged on an opening hole of a wall, and the inner pipe is installed inside the outer pipe. The outer wall of the inner pipe is provided with a first clamping part, and the inner wall of the outer pipe is provided with a second clamping part. Theinner pipe is connected with the outer pipe through the coordination of the first clamping part and the second clamping part. By application of the technical scheme, after the inner pipe is insertedinto the outer pipe, the inner pipe can be installed into the outer pipe through the first clamping part and the second clamping part. By adoption of the structure, the air duct can be easily and conveniently assembled and disassembled. Moreover, the length of the air duct can be adjusted according to the thickness of the wall, the structure is compact and the connection is stable. Drilling screwholes in the outer pipe and the inner pipe to connect by screws is avoided, then the smoothness of the outer wall of the outer pipe and the inner wall of the inner pipe is ensured, the outer wall of the outer pipe has no bump and can seamlessly fit with the wall, and the inner wall of the inner pipe also has no bump, so that the flow of air in the air duct is not affected.

Description

technical field [0001] The invention relates to the technical field of fresh air blowers, in particular to an air duct and a fresh air blower. Background technique [0002] As air pollution becomes more and more serious, the public pays more attention to indoor air quality. Fresh air fans are welcomed by more people and gradually enter households. The development of products is becoming more and more diversified. [0003] The installation of the fresh air fan needs to introduce the outdoor fresh air through the wall through the air duct, and then send it to the room after the air is purified. The air duct of the fresh air fan includes an outer tube and an inner tube. When installing, the outer tube should be threaded on the wall first, and then holes need to be drilled in the outer tube, and then the inner and outer tubes should be fixed with screws. [0004] The above-mentioned connection method between the outer pipe and the inner pipe requires drilling tools during insta...

AI Technical Summary

Problems solved by technology

[0005] The embodiment of the present invention provides an air duct and a new fan to solve the technical problems of inconvenient installation and poor installation effect existing in the installation of the air duct of the fresh fan in the prior art

Images