JP2015183896A5

JP2015183896A5 -

Info

Publication number: JP2015183896A5
Application number: JP2014059400A
Authority: JP
Filing date: 2014-03-24
Publication date: 2017-03-30
Anticipated expiration: 2034-03-24

Description

上記目的を達成するために、本発明の請求項１の発明は、流体加熱機本体に設けたメインバーナ及び先混合方式のパイロットバーナと、メインバーナ及びパイロットバーナに燃焼用空気を供給する送風機と、流体加熱機本体と送風機を接続し、燃焼用空気の空気通路を形成する空気ダクトと、空気ダクトに設けられ、燃焼用空気の量を制御する風量制御用ダンパーと備え、パイロットバーナへ単独の燃焼用空気を供給しない先混合式のパイロットバーナの運転に連続パイロット制御又は交替パイロット制御を採用した流体加熱機の燃焼制御装置において、前記風量制御用ダンパーの一次側の空気通路に空気通路から分岐する空気分岐通路を設け、当該空気分岐通路に自動弁を設けると共に、空気分岐通路の下流側端部を流体加熱機の排ガスダクトに接続若しくは大気に開放し、前記パイロットバーナの単独燃焼時のみ自動弁を開状態に制御し、空気通路を流れる燃焼用空気の一部を空気分岐通路側に流してパイロットバーナに供給する燃焼用空気の量を低減することに特徴がある。 In order to achieve the above object, a first aspect of the present invention includes a main burner and a premixed pilot burner provided in a fluid heater body, and a blower for supplying combustion air to the main burner and the pilot burner. The air duct that connects the fluid heater body and the blower and forms the air passage for the combustion air, and the air volume control damper that is provided in the air duct and controls the amount of the combustion air are provided to the pilot burner. In a combustion control apparatus for a fluid heater employing continuous pilot control or alternate pilot control for operation of a premixed pilot burner that does not supply combustion air, the air flow control damper branches from the air passage to the primary air passage An air branch passage is provided, an automatic valve is provided in the air branch passage, and the downstream end of the air branch passage is connected to the exhaust gas exhaust of the fluid heater. Open connection or to the atmosphere bets, the controls alone combustion only when the automatic valve of the pilot burner in the open state, the combustion is supplied to the pilot burner part of the combustion air flowing through the air passage to flow to the air branch passage side It is characterized by reducing the amount of working air .

本発明の請求項３の発明は、請求項１又は請求項２に記載の発明において、自動弁をクイックシャット型の自動弁又はクイックオープン型の自動弁としたことに特徴がある。 The invention of claim 3 of the present invention is characterized in that, in the invention of claim 1 or 2 , the automatic valve is a quick shut type automatic valve or a quick open type automatic valve.

Claims

A main burner and a premixed pilot burner provided in the fluid heater main body, a blower for supplying combustion air to the main burner and the pilot burner, a fluid heater main body and the blower are connected, and an air passage for the combustion air is provided. The air duct to be formed and the air volume control damper that is provided in the air duct and controls the amount of combustion air, and continuous pilot control for the operation of a premixed pilot burner that does not supply a single combustion air to the pilot burner Alternatively, in the combustion control device for a fluid heater employing alternating pilot control, an air branch passage for branching the air passage is provided in the air passage on the primary side of the air volume control damper, and an automatic valve is provided in the air branch passage. the downstream end of the air branch passage open to the connection or the atmosphere exhaust gas duct of the fluid heater, the pilot burner Controls opened automatic valve only when Germany combustion fluid a part of the combustion air flowing through the air passage, characterized in that to reduce the amount of combustion air supplied to flow to the air branch passage side to the pilot burner Combustion control device for heating machine.

The combustion control device for a fluid heater according to claim 1, wherein a plurality of air branch passages are provided, and an automatic valve is provided in each air branch passage.

The combustion control device for a fluid heater according to claim 1 or 2 , wherein the automatic valve is a quick shut type automatic valve or a quick open type automatic valve .