Air inlet silencing structure and gas heating water heater

By using a combination of sound-absorbing pipes and sound-absorbing cotton in the gas-fired heating and hot water boiler, the noise problem during air intake is solved, low-frequency noise is effectively reduced, and the comfort of using the equipment is improved.

CN224162266UActive Publication Date: 2026-04-24GUANGZHOU DEVOTION HOME ENVIRONMENT TECH CO LTD
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Patent Information

Application Number
CN202520967990.X
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2025-05-16
Publication Date
2026-04-24
Estimated Expiration
2035-05-16

AI Technical Summary

Technical Problem

Existing gas-fired heating and hot water boilers produce significant noise when air enters the premixer, especially the problems of ignition explosion and low-frequency noise during low-frequency combustion, which have not been effectively resolved.

Method used

The structure combines a silencing pipe with sound-absorbing cotton. The sound-absorbing cotton is used to absorb the noise generated by the friction between the air and the inner wall of the pipe. The silencing pipe is designed in a smooth inverted L shape to reduce noise diffusion. The sound-absorbing cotton material is selected from glass fiber cotton, polyester fiber cotton or rock wool. The air inlet is designed in a trumpet shape to ensure smooth airflow. The buffer section is designed with a multi-bend structure to slow down the air flow rate.

Benefits of technology

It effectively reduces noise during air intake, reduces the explosion noise during ignition of the hot water heater and the low-frequency noise during low-fire combustion, and improves the user experience.

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Abstract

The utility model discloses an air inlet noise reduction structure and gas heating water heater, the air inlet noise reduction structure comprises a noise reduction pipe and noise reduction cotton, the noise reduction pipe is provided with an air inlet end, an air buffer end and a connecting end, the air inlet end is provided with a trumpet-shaped air inlet, the air buffer end is of a round inverted L-shaped structure, and the connecting end is connected with the noise reduction cotton. The joining end is provided with a joining port for joining a premixer; the silencing cotton sleeve is arranged at one end of the air inlet end close to the air inlet. According to the air inlet noise reduction structure, through the structure that the noise reduction pipe is combined with the noise reduction cotton, the noise reduction cotton is used for absorbing noise generated by friction between air and the inner wall of the pipeline in the air inlet process, the air inlet noise is prevented from being further expanded through the pipeline, and through the action of the long and smooth noise reduction pipe, the air inlet noise is further reduced; the ignition deflagration sound of the subsequent water heater and the low-frequency noise generated during small fire combustion are reduced.
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