Control system for gas fireplace

The control system for gas fireplaces addresses wear and motion transfer issues by using a slider-crank mechanism and buffer devices, ensuring smooth operation and extended push rod life while enabling adjustable flow rates and easy state transitions.

EP4675172A1Pending Publication Date: 2026-01-07NINGBO RICHEN ELECTRIC APPLIANCE CO LTD
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Patent Information

Application Number
EP2025185835
Authority / Receiving Office
EP · EP
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-07-05
Filing Date
2025-06-27
Publication Date
2026-01-07

AI Technical Summary

Technical Problem

Existing control systems for gas fireplaces with direct push valves face issues of wear on the push rod due to relative sliding, leading to potential jamming and reduced service life, and require complex motion transfer for long-distance control.

Method used

A control system incorporating a slider-crank mechanism that converts linear motion of the operating rod into linear motion of the jacking rod, reducing displacement and ensuring consistent motion direction with the push rod, along with buffer positioning devices for smooth operation and adjustable flow rates.

Benefits of technology

The system provides smooth operation, reduces wear on the push rod, prolongs its service life, and allows convenient adjustment between high-level and low-level gas supply states with automatic return to desired positions, enhancing user convenience and safety.

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Abstract

Disclosed is a control system for a gas fireplace, including a housing, a direct push valve and a driving mechanism, where the direct push valve is disposed on the housing, and includes a valve body, and a push rod disposed along an axis of the valve body, the driving mechanism is disposed on the housing, and is capable of driving the push rod to do linear motion along the axis of the valve body, and the driving mechanism includes an operating rod doing linear motion along the housing, a first connecting rod hinged to a bottom end of the operating rod, a rotating rod hinged to the other end of the first connecting rod, a second connecting rod hinged to the other end of the rotating rod, and a jacking rod hinged to the other end of the second connecting rod. A rotating shaft is disposed on the housing, the rotating rod is capable of rotating around the rotating shaft, and the jacking rod is capable of doing linear motion along the axis of the valve body. When the operating rod does linear motion in a vertical direction of the housing, the jacking rod is pushed to do linear motion along the axis of the valve body. When the jacking rod does linear motion along the axis of the valve body, the push rod is pushed to do linear motion along the axis of the valve body.
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