Ventilation system

The ventilation device addresses noise, oil accumulation, and vibration issues by using sound-absorbing members on three sides and a projection-supported bottom member, improving noise reduction and maintenance accessibility.

JP2026110043APending Publication Date: 2026-07-02EBARA CORP
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Patent Information

Authority / Receiving Office
JP · JP
Patent Type
Applications
Current Assignee / Owner
EBARA CORP
Filing Date
2024-12-20
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Existing ventilation devices with centrifugal blowers face issues with noise reduction, oil accumulation, vibration amplification, and maintenance interference due to insufficient sound-absorbing materials and design limitations.

Method used

The ventilation device incorporates sound-absorbing members on three sides and the bottom surface of the airflow path, with a second sound-absorbing member fixed to a projection on the bottom surface to create a space for airflow, preventing oil accumulation and enhancing noise reduction, while using projections to increase rigidity and facilitate maintenance.

Benefits of technology

The solution effectively reduces noise, prevents oil accumulation, reduces vibration, and simplifies maintenance by providing an inspection door, enhancing overall performance and usability.

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Abstract

To provide a ventilation system that can sufficiently reduce noise. [Solution] A ventilation device comprising an external housing having an intake opening for drawing in air and an exhaust opening for discharging air, and a centrifugal blower housed in the external housing, wherein the centrifugal blower comprises a scroll casing formed with an intake port for drawing in air from the intake opening and an exhaust port connected to the exhaust opening, the external housing has a side portion and a bottom portion located in the left-right direction of the airflow entering from the intake opening when the ventilation device is installed, and the ventilation device further comprises a first sound-absorbing member fixed to the side portion and a second sound-absorbing member fixed to the bottom portion, the second sound-absorbing member being fixed to the upper part of a projection provided on the bottom portion, thereby forming a space between the second sound-absorbing member and the bottom portion.
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