Indoor unit of air conditioner, outdoor unit of air conditioner and noise reduction device of air conditioner

Abstract

The invention provides a noise reduction device of an air conditioner. The noise reduction device of the air conditioner comprises a front panel, an air outlet and an air guide ring, wherein the air outlet is formed in the front panel; the air guide ring is correspondingly arranged at the air outlet; the periphery of the windward side of the air guide ring is turned outwards to form a turned edge; an annular groove is formed between the turned edge and the front panel; a noise reduction piece is arranged in the groove along the air guide ring; a windward surface of the noise reduction piece is a sound absorption surface; the noise reduction piece is provided with a first side surface attached to the interior of the groove. The pressure of airflow away from the turned edge of the air guide ring is absorbed by the noise reduction piece, the speed of the airflow is decreased, the airflow is weakened, backflow and eddy formed at the air guide ring are effectively reduced, the noise, particularly the noise values of points in all directions, of an inner cavity of the air conditioner is greatly reduced, and the aims of reducing the noise of the air conditioner and improving the sound quality of the air conditioner and the auditory comfort are achieved. The invention further provides an indoor unit and an outdoor unit with the noise reduction device of the air conditioner. In the aspect of the total noise which can be sensed by a user, the noise value of a fan is reduced from 48.5 decibels to 47.3 decibels.

Description

technical field [0001] The invention belongs to the technical field of air conditioner manufacturing, and in particular relates to an air conditioner indoor unit, an air conditioner outdoor unit and an air conditioner noise reduction device. Background technique [0002] At present, most of the air guide rings on the air conditioner adopt the structure of flanging outwards and then expanding into a bell mouth. In this way, a circle of flanges is formed on the windward side of the air guide ring, which leads to the axial flow fan blades working. Part of the air flow breaks away from the air guide ring and blows to the front panel to form a backflow, which generates a large spiral flow at the root of the air guide ring, resulting in a large noise, especially the spiral flow noise formed here will directly pass through the heat exchanger It is transmitted to the back and left side of the air conditioner, so the noise of the air conditioner is finally caused. Contents of the i...

AI Technical Summary

Problems solved by technology

[0003] The object of the present invention is to provide a noise reduction device for an air conditioner, aiming to solve the problem in the prior art that the air conditioner is loud and affects the hearing comfort

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