Venturi for boiler

The venturi design addresses turndown ratio limitations in combustion devices by adjusting air and gas flow rates in three steps, improving stability and durability through a shaft, cam, and blade mechanism, enhancing combustion efficiency.

US20260185704A1Pending Publication Date: 2026-07-02KYUNGDONG NAVIEN CO LTD
0 Cites 0 Cited by

Patent Information

Application Number
US19/431786
Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
Priority Date
2024-12-31
Filing Date
2025-12-23
Publication Date
2026-07-02

AI Technical Summary

Technical Problem

Combustion devices, such as boilers and water heaters, face limitations in turndown ratio (TDR), leading to frequent on/off operations and reduced durability due to inadequate adjustment of air and gas flow rates, especially at low output levels.

Method used

A venturi design with a housing containing multiple passages and a flow rate adjuster that allows for simultaneous adjustment of air and gas flow rates in three steps, using a shaft, cam, and blade mechanism to control opening and closing of gas passages and adjust air through-holes, enhancing turndown ratio.

Benefits of technology

The venturi design improves turndown ratio by allowing precise control of air and gas flow rates, reducing frequent on/off operations and enhancing combustion stability, thereby increasing the durability and efficiency of combustion devices.

✦ Generated by Eureka AI based on patent content.
Patent Text Reader

Abstract

Provided is a venturi. The venturi includes a housing, a first opening / closing part, a second opening / closing part, and a flow rate adjuster. The flow rate adjuster includes a shaft that is rotatably coupled to the housing and that passes through the air passage in an upward / downward direction that is perpendicular to the reference direction, a cam that is integrally and rotatably coupled to the shaft and that applies or releases an external force to the first opening / closing part and the second opening / closing part, and a blade that is integrally and rotatably coupled to the shaft and provided with a plurality of wings.
Need to check novelty before this filing date? Find Prior Art