200427948 Π) 玖、發明說明 【發明所屬之技術領域】 本發明是特別關於將根據液化石油氣（LPG )之燃，燒 火焰用於熱源’產生完全燃燒之熱風或溫風的氣體燃燒裝 置。 【先前技術】 以往，氣體燃燒裝置是內裝於利用例如LGP之攜帶 用吹風機（hair-dryer)或熱風器等的機器內。 如第1至4圖所示，內裝於例如吹風機〗〇1之氣體燃 燒裝置103是將用來燃燒氣體的燃燒器105設於吹風機 1〇1的筒狀之外殼107內。燃燒器105是用來使由作爲氣 體供給源的氣體槽（未圖示）所供給之燃料氣體燃燒者， 在燃燒器1 0 5所加熱的空氣是藉由以經由托架1 〇 9設於外 殼107的入口側之馬達111及安裝於馬達ηι之風扇n3 所構成的送風機1 1 5，來流出到出口 1 1 7側。 在由氣體槽至燃燒器105的氣體流通路119中，設 有：用來藉由以供給至燃燒器1 05的燃料氣體的流速所造 成的負壓來吸引外部氣體，具備吸引口 121之噴射器 1 2 3。如第3圖所示，在噴射器1 2 3，被供給的例如L P G 由噴射器123內的噴嘴125以高速噴射。藉由因氣體的噴 射速度所引起的噴射效果，產生負壓，燃燒所需的外部氣 體由吸引口 121流入，而生成氣體（LPG)與空氣之混合 氣體。 -5 - (2) (2)200427948 混合氣體是由在燃燒益1 0 5的入口側設置於內部之芯 部127 (金屬線網）噴出’由點火柱129(著火裝置）受 到高壓電器所產生的火花飛射至芯部127，使已被噴出的 混合氣體著火。 燃燒器105是配置於送風機115與外殼107的出口 1 1 7之間，與燃燒器1 05的長方向正交之斷面形狀如第4 圖所示，芯部1 2 7被配置於其中心部，且在芯部1 2 7的周 圍具備有呈8等份之星形突起的形狀地朝放射方向設置的 溝槽狀之8個燃燒室1 3 1的非圓形筒狀體（參照日本特開 2002-233416)。 但，如第1圖所示，使用以往的氣體燃燒裝置1 03之 使燃料氣體著火及燃燒的工序，是包含有··在作成根據送 風機1 15之送風量一定的狀態下，燃料氣體（LPG )供給 至噴射器123的工序；由噴射器123的吸引口 121吸引外 部氣體的工序；生成燃料氣體與空氣之混合氣體，由芯部 127的表面噴出之工序；來自於點火柱129(著火裝置） 的火花使由芯部1 27所噴出的混合氣體著火，然後在燃燒 器1 〇5的內部燃燒之工序；及燃燒空氣作爲溫風，朝出口 1 1 7排出之工序。此燃燒狀態是持續至LPG的供給被遮斷 爲止。 但’上述混合氣體的著火性能、與著火後的燃燒氣體 的燃燒性能爲相反關係。即，爲了使氣體的著火性能提 昇’須要提昇混合氣體之氣體比率，但當在氣體比率高的 狀態下使其燃燒時，則會有大量之不完全燃燒氣體產生， -6- (3) (3)200427948 而燃燒性能惡化之問題點。其結果，c〇濃度增加。 相反地，當爲了作成良好的燃燒性能，而增加混合氣 體之空氣量，降低氣體比率時，雖燃燒性能良好，但由於 空氣的量變多，變得不易著火，形成無法開始燃燒之問題 點產生。 在以往的氣體燃燒裝置，因在藉由一次燃燒室11經 常供給一定的空氣量之狀態下燃燒，所以會有不易作成用 來充分滿足著火性能與燃燒性能雙方之混合氣體的問題 點。 本發明是爲了解決上述課題而開發完成的發明，其目 的在於提供謀求氣體著火性之提昇的同時，可謀求氣體燃 燒性能的提昇，而能削減CO濃度之氣體燃燒控制方法及 氣體燃燒裝置。 【發明內容】 爲了達到上述目的，本發明之氣體燃燒控制方法，是 具備有：燃燒來自氣體供給源所供給的燃料氣體之燃燒 器；調整內裝有前述燃燒器的筒狀外殼內的空氣量之空氣 量調整裝置；將混合有由前述氣體供給源供給至前述燃燒 器的燃料氣體與前述外殼內的空氣之混合氣體噴出至前述 燃燒室內的芯部；將由前述芯部噴出的混合氣體點火之著 火裝置；及控制前述空氣料調整裝置及前述著火裝置的控 制裝置的氣體燃燒裝置之氣體燃燒控制方法，其特徵爲： 包含下述工序： (4) 200427948 在由前述芯部所噴出的混合氣體著火前之狀態，控制 前述空氣量調整裝置，使前述外殼內的空氣量減少之第1 空氣量調整工序；使前述混合氣體著火之著火工序；以及 在前述著火工序後，以較前述第1空氣量調整工序更高的 輸出將前述空氣量調整裝置作動，使前述外殻內的空氣量 增加之第2空氣量調整工序。200427948 Π) 发明. Description of the invention [Technical field to which the invention belongs] The present invention relates particularly to a gas combustion device that uses a liquefied petroleum gas (LPG) to burn and burn a flame as a heat source 'to generate fully-burning hot or warm air. [Prior Art] Conventionally, a gas combustion device has been built into a device using a hair dryer (dryer) or a hot air blower such as an LGP. As shown in Figs. 1 to 4, the gas combustion device 103 built in, for example, a hair dryer [01] is provided with a burner 105 for burning gas in a cylindrical casing 107 of the hair dryer 101. The burner 105 is a burner for burning fuel gas supplied from a gas tank (not shown) as a gas supply source, and the air heated by the burner 105 is installed in a bracket 10 The blower 1 1 5 composed of the motor 111 on the inlet side of the housing 107 and the fan n3 mounted on the motor η flows out to the outlet 1 1 7 side. The gas flow path 119 from the gas tank to the burner 105 is provided to attract external air by a negative pressure caused by the flow rate of the fuel gas supplied to the burner 105, and is provided with an injection of the suction port 121器 1 2 3. As shown in FIG. 3, in the ejector 1 2 3, for example, L P G is supplied from the nozzle 125 in the ejector 123 at high speed. Due to the injection effect caused by the injection speed of the gas, a negative pressure is generated, and external gas required for combustion flows in through the suction port 121 to generate a mixed gas of a gas (LPG) and air. -5-(2) (2) 200427948 The mixed gas is ejected from a core 127 (metal wire mesh) provided inside the combustion inlet 105, which is generated by the ignition column 129 (ignition device) received by a high-voltage electrical appliance. The sparks flew to the core 127, causing the mixed gas that had been ejected to catch fire. The burner 105 is arranged between the blower 115 and the outlet 1 1 7 of the casing 107. The cross-sectional shape orthogonal to the longitudinal direction of the burner 105 is shown in Fig. 4, and the core 1 2 7 is arranged at the center. Non-circular cylindrical body with 8 combustion chambers 1 3 1 in the shape of a groove arranged in the radial direction around the core 1 2 7 in the shape of a star-shaped protrusion 8 (see Japan) JP 2002-233416). However, as shown in FIG. 1, the process of igniting and igniting the fuel gas using the conventional gas combustion device 103 includes the following steps: The fuel gas (LPG ) A process of supplying to the injector 123; a process of attracting external air through the suction port 121 of the injector 123; a process of generating a mixed gas of fuel gas and air and ejecting from the surface of the core 127; from the ignition pillar 129 (ignition device) ) Sparks to ignite the mixed gas ejected from the core portion 27, and then burn the inside of the burner 105; and the step of burning the air as warm air and discharging it to the outlet 11-17. This combustion state is continued until the supply of LPG is interrupted. However, the ignition performance of the above-mentioned mixed gas is inversely related to the combustion performance of the combustion gas after ignition. That is, in order to improve the ignition performance of the gas, it is necessary to increase the gas ratio of the mixed gas, but when it is burned under a high gas ratio, a large amount of incomplete combustion gas will be generated, -6- (3) ( 3) 200427948 The problem of deterioration of combustion performance. As a result, the concentration of co was increased. Conversely, when the amount of air in the mixed gas is increased and the gas ratio is decreased in order to achieve good combustion performance, although the combustion performance is good, the amount of air becomes larger, which makes it difficult to catch fire and causes the problem that combustion cannot be started. In the conventional gas combustion apparatus, since the primary combustion chamber 11 is constantly supplied with a certain amount of air, it has a problem that it is not easy to be used to sufficiently satisfy the mixed gas of both ignition performance and combustion performance. The present invention has been developed in order to solve the above-mentioned problems, and an object thereof is to provide a gas combustion control method and a gas combustion device that can improve gas combustion performance while improving gas combustion performance and can reduce CO concentration. [Summary of the Invention] In order to achieve the above-mentioned object, the gas combustion control method of the present invention includes a burner that burns fuel gas supplied from a gas supply source, and adjusts the amount of air in a cylindrical casing containing the burner An air volume adjusting device; spraying a mixed gas mixed with the fuel gas supplied from the gas supply source to the burner and the air in the casing to a core of the combustion chamber; and igniting the mixed gas sprayed from the core An ignition device; and a gas combustion control method for a gas combustion device that controls the air mass adjustment device and the control device of the ignition device, including the following steps: (4) 200427948 The mixed gas ejected from the core portion The first air volume adjustment process for controlling the air volume adjustment device to reduce the amount of air in the casing; the ignition process for igniting the mixed gas; and after the ignition process, the air volume is adjusted to be lower than the first air volume. The higher output of the volume adjustment process activates the aforementioned air volume adjustment device, Increasing the amount of air within the housing of the second air amount adjustment step.
又，爲了達到上述目的，本發明之氣體燃燒裝置，其 特徵爲，由：用來燃燒由氣體供給源所供給的燃料氣體之 燃燒器、調整內裝有前述燃燒器的筒狀外殼內的空氣量之 空氣量調整裝置、將在由前述氣體供給源供給至前述燃燒 器的燃料氣體混合有前述外殼內的空氣之混合氣體噴出至 前述燃燒室內的芯部、用來將由前述芯部所噴出的混合氣 體點火之著火裝置、檢測前述燃燒器內的混合氣體已經著 火之著火檢測裝置、根據前述著火檢測裝置的信號，至少 控制前述空氣量調整裝置及前述著火裝置之控制裝置所構 成， 前述控制裝置是當在前述著火檢測裝置未檢測到著火 時，控制前述空氣量調整裝置，使前述外殼內的空氣量減 少，且當在前述著火檢測裝置檢測到著火後，控制前述空 氣量調整裝置，增加外殼內的空氣量。 【實施方式】 以下，參照圖面說明關於本發明的一實施形態之氣體 燃燒控制方法及氣體燃燒裝置。 (5) (5)200427948 在以下，舉例顯示本實施形態之氣體燃燒裝置1是內 裝於吹風機3之情況。吹風機3是筒狀外殼5大致呈圓筒 形狀’在對於外殼5的長方向大致呈正交之方向，長手把 部（未圖示）設置於上述外殼5的側壁面，氣體燃燒裝置 1內裝於上述外殼5。 如第6圖所示，氣體燃燒裝置丨是具備：用來混合作 爲燃燒氣體的例如LPG與空氣，生成混合氣體之噴射器 7 ;作爲用來將藉由噴射器7所生成的混合氣體點火的點 火裝置之例如電極9 ;燃燒受到電極9所點火的混合氣體 之燃燒器1 1。 且，在外殼5，用來使在燃燒器1 1加熱過的燃燒空 氣流出至外殻5的出口 1 3側之送風機1 5，內裝於較噴射 器7更後方側（在第6圖爲右側）。再者，送風機1 5是 作爲調整外殼5內部的空氣量之空氣量調整裝置來發揮功 能。 送風機15’由藉由具備空氣流通路的托架19安裝於 外殼5的後方側的內壁面之直流馬達1 7、設在直流馬達 1 7的旋轉軸之送風用軸流風扇2 1所構成。 再者，外殻5的後端（在第6圖爲右端）是爲了安 全’而以例如具備有取入空氣用的多數孔之壁面加以覆 蓋’在外殻5的前方端（在第6圖爲左端），可裝卸地安 裝有熱風出口用噴嘴（未圖示）。 參照第7及第8圖，更詳細敘述關於燃燒器n。燃 燒器1 1的室2 3是由鋁（壓鑄）所構成，在此實施形態， * 9 - (6) (6)200427948 燃燒器1 1的長方向的左右側面是如第7及8圖所示，大 致呈圓形的筒狀體。室23的內部是由位於後方（第6圖 爲右側）之一次燃燒室2 5 ;及位於此一次燃燒室2 5的前 方（在第6圖爲左方）之二次燃燒室2 7所構成。噴射器 7是裝設於一次燃燒室25的後方（在第6圖爲右方）之 氣體導入側。 上述噴射器7是在大致斷面圓筒形狀的噴射器主體 2 9的入口側設有噴嘴3 3，該噴嘴是用來噴射：由儲存作 爲燃燒氣體之例如LPG的氣體槽（未圖示）等之氣體供 給源，經由作爲氣體流通路的例如氣體供給管3 1所供給 之氣體。在噴嘴33的前端，設置口徑爲例如φ 60μπι〜p 200μιη的針孔之噴射孔（未圖示）。此噴射孔是設置於圓 板狀的針孔碟片（未圖示）的大致中央之孔，LPG是由噴 射孔呈細、且接近音速之高速噴出。又，在噴嘴33內， 內裝有用來除去使噴射控封閉之雜質或垃圾的過濾器（未 圖示）。再者，作爲過濾器，能夠使用具有例如1 〇〜 3 Ομπι 口徑的針孔之燒結金屬等。再者，噴射器主體的斷 面形狀亦可適宜變更。 又，在噴嘴33的前方之噴射器主體2 9的內部，設有 用來將LPG與外部空氣（一次空氣）混合後導入至燃燒 器1 1之混合器3 5，在混合器3 5的側壁貫通有用來由外 部吸引一次空氣的一次空氣孔部3 7。因此，受到由噴嘴 3 3以高速噴出的燃燒氣體，使得混合器3 5內形成負壓， 一次空氣由外部被吸引，其一邊與已被噴出的燃燒氣體一 -10- (7) (7)200427948 同混合，一邊被輸送到前方的作爲氣體燃燒部之例如芯部 3 9。此稱爲噴射效果。再者藉由調節一次空氣孔部3 7的 面積，能夠調節一次空氣的比例。又，如後所述，每單位 時間供給至外殼5的一次空氣亦可藉由受到控制裝置55 所控制的直流馬達1 7之輸出來調整。 又，芯部3 9是作爲氣體燃燒部，以例如5 0〜1 5 0網 目的 S U S金屬線網形成圓筒狀，以例如熔接來安裝在噴 射器主體2 9的前端，設在燃燒器1 1的一次燃燒室2 5之 第6圖爲右側的大致中心部。又，在芯部3 9的前方端， 例如以熔接安裝作爲直進抑制部的芯部座4 1。藉由芯部 座4 1，由混合器3 5所噴出的混合氣體，主要朝側方（第 6圖的箭號AR1方向）被導引，由芯部39的網孔排出由 LPG與空氣所構成之混合氣體。再者，著火後的火焰形成 藍色且大致呈圓形。 又，前述電極9是在燃燒器1 1的內部設置於接近芯 部3 9的前方之側面的位置。在電極9，藉由電線4 3輸入 以點火用壓電元件（未圖示）所產生的高壓電，使火花由 電極9的前端飛射到芯部39。火花將由芯部39所噴出的 混合氣體加以引火，而使氣體燃燒。 又，如第7圖所示，在一次燃燒室25的內壁，以芯 部3 9爲中心朝周圍的放射方向設置朝前後方向延伸之複 數個溝槽部45。在第7圖，形成有6處所之溝槽部45。 進一步，在一次燃燒室25的後壁部（在第6圖爲右 側壁），設有用來對一次燃燒室25供給外部氣體（二次 (8) (8)200427948 空氣）之複數個二次空氣孔部46。複數個二次空氣孔部 4 6是配置成：在著火部以外的位置將二次空氣供給至著 火後的混合氣體。再者，上述著火部是指的火花所飛射之 區域，如第7圖的虛線所包圍的範圍所示地，爲芯部39 的周圍，且爲電極9側的區域。再者，在本實施形態，總 計設有5處所的二次空氣孔部46。 又，作爲用來對於二次燃燒室2 7供給外部氣體（三 次空氣）之三次空氣孔部的例如複數個三次空氣管路4 7 是設於各溝槽部4 5間的一次燃燒室2 5之壁內，在本實施 形態，總計設置6處所的三次空氣管路47。 又，二次燃燒室2 7的前方端設置開口部。此開口部 形成用來排出在二次燃燒室27所燃燒的燃燒氣體之燃燒 氣體出口 49。 又，在室23的外周側，設有熱交換用的複數片散熱 片5 1。此散熱片5 1是釋放在室內混合氣體燃燒時所產生 的產生熱，來將室23冷卻。因此，因具有熱交換的效 果，所以釋出室23的熱，被釋放出的熱可有效率地傳達 至由軸流風扇2 1所送風之空氣流。 又，在外殼5(或手把部）的內部，於燃燒器11的 燃燒氣體出口 49之附近設置著火檢測裝置（著火感應 器）53，此檢測裝置是檢測燃燒器1 1內的氣體（LPG ) 是否已經著火。 又，在外殻5的內部，設有控制裝置5 5，此控制裝 置是藉由直流馬達17的ΟΝ/OFF動作、以及以著火感應 -12- (9) (9)200427948 器5 3所檢測到燃燒器1 1的氣體已經著火之檢測信號’控 制直流馬達1 7的旋轉速度，ΟΝ/OFF控制對於作爲者火 裝置的電極9之通電。 詳細而言’控制裝置5 5是在著火時與著火後進行不 同的控制。即，在著火時，爲了作成減少外殼5內的空氣 量，使得容易著火的狀態，而進行降低直流馬達1 7的旋 轉數之低輸出運轉（L 〇 w運轉）。又，控制裝置5 5是在 著火後的狀態下，根據著火感應器5 3所檢測到著火的信 號，爲了降低C Ο濃度，而進行提昇直流馬達1 7的旋轉 數之高輸出運轉（Hi運轉），將外殼5內的空氣量增 加。再者，控制裝置5 5是電連接於電源、直流馬達1 7、 電極9、著火感應器5 3。又，控制裝置5 5也能夠控制用 來供給及停止燃料氣體之開關閥（未圖示）的開關動作。 以下，參照第9圖，說明控制裝置5 5的動作、及本 實施形態之動作至停止爲止的流程。 首先，當打開（ON )運轉用開關（未圖示）時（步 驟1 )，則ON信號被送至控制裝置5 5 ’由控制裝置5 5 賦予送風機1 5之燃燒器1 1通電的指令，開始送風（步驟 2 )。在步驟2的時間點，因燃燒器1 1未供給LPG，著火 感應器53所輸出的著火檢測信號爲OFF，所以由控制裝 置5 5賦予下降直流馬達1 7的旋轉之指令，控制裝置5 5 內的空氣量減少，進行低輸出運轉（步驟3 )。接著，打 開氣體供給管31的開關閥（未圖示），由氣體供給源將 作爲燃料氣體的LPG經過氣體供給管3 1供給至燃燒器i i -13- (10) (10)200427948 的噴射器7之噴嘴33(步驟4)。 當LPG經過氣體供給管3 1被供給至噴射器7的噴嘴 3 3時，則LPG通過噴嘴3 3內部的過濾器，由作爲孔之噴 射孔以接近音速的速度噴出至混合器3 5。因此，在混合 器3 5，受到根據噴射效果所產生的負壓，由一次空氣孔 部3 7吸引燃燒所需的一次空氣（相應於空氣-燃料比） 後，流入至混合器3 5 (步驟5 )。在步驟5所流入的一次 空氣與LPG混合而形成混合氣體，朝前方的芯部39噴出 (步驟6 )。 再者，在步驟6，在混合器35，與LPG的增減成比 例，自動地吸引燃燒所需的一次空氣。但，在外殼5的內 部，由於因藉由控制裝置5 5使以低輸出運轉直流馬達 1 7，所以作爲著火時的燃燒用空氣，空氣量減少，故如第 5圖的小箭號所示，由一次空氣孔部3 7所吸引的一次空 氣量也減少。因此，由於氣體比率高，故著火形良好的混 合氣體被朝前方的芯部39噴射。 在芯部3 9，因於前方端面設有芯部座4〗，所以混合 氣體主要由側面的網眼之SUS金屬線網朝周圍噴出。 其次，由控制裝置55賦予指令，來自於點火用壓電 元件的高壓電經過電線43而通電，由燃燒器1 1內的電極 9產生火花，使得由芯部3 9所噴出的著火性良好之混合 氣體著火（步驟7 )。 再者’著火的時間點，也就是步驟6結束後至執行步 驟7爲止的時間，是因應適應本發明的裝置加以適宜變 -14 - (11) (11)200427948 更。即，考量外殼5的容積等，決定各裝置最適當的著火 時間點。 又，大部分之燃燒火焰由芯部3 9的側面朝外側擴展 成圓形，燃燒火焰的長度達到由芯部2 5算起之十數nim左 右，溫風是沿著一次燃燒室2 5的內部以及內壁的6個溝 槽部45逐漸傳達到前方的二次燃燒室27。 接著，判別著火信號的ΟΝ/OFF (步驟8 )。當燃燒 氣體由二次燃燒室27的前方之燃燒氣體出口 49排出時’ 藉由設在燃燒氣體出口 49的附近之著火感應器5 3，檢測 燃燒器11的氣體著火燃燒（在步驟8爲YES的情況 時）。因藉由將此著火檢測信號送至控制裝置5 5，根據 來自於控制裝置5 5的指令開始高輸出運轉（步驟9 )， 而提昇直流馬達1 7的旋轉數，所以外殼5內部的空氣量 增加。再者，在步驟8，當著火檢測信號並非爲ON狀態 的情況，也就是未開始著火的情況時，回到步驟7。 當開始高輸出運轉時，則如第5圖大箭號所示，作爲 燃燒時的燃燒用空氣，由一次空氣孔部3 7所吸引的一次 空氣之空氣量增加。因此，混合器35的混合空氣的空氣 混合率變高’燃燒性能良好的混合氣體由芯部3 9噴出’ 促進一次燃燒室2 5的氣體之燃燒反應，提昇燃燒性能。 且’在一次燃燒室25，爲了增加外殼5內部的空氣 量來提昇燃燒效率，而二次空氣通過5個二次空氣孔部 46被導入（步驟10)。其結果，促進一次燃燒室25的氣 體之燃燒反應，進一步提昇燃燒性能。 •15- (12) (12)200427948 且，在二次燃燒室27，爲了增加外殼5內部的空氣 量，而通過6個三次空氣管路47 (三次空氣孔部）導入 三次空氣（步驟11)。此三次空氣是有效率地降低一次 燃燒室2 5的壁部之溫度，並且在通過三次空氣管路4 7時 加溫成高溫後導入至二次燃燒室2 7。其結果，促進此二 次燃燒室2 7的氣體之燃燒反應，提昇燃燒性能。即，因 在一次燃燒室25結束燃燒的氣體與受到高溫所增加空氣 量的三次空氣混合，所以會有變得容易進行燃燒反應，容 易達到完全燃燒之效果。藉此，提昇燃燒性能，減少C Ο 濃度。 一方面，當運轉用開關關閉（OFF )時（步驟12 ), 藉由控制裝置5 5停止直流馬達1 7，並且關閉氣體供給管 31的開關閥（未圖示）（步驟13)。其結果，LPG的供 給通路被遮斷，因而停止燃燒氣體裝置的運轉。 再者，本發明不限於前述實施形態者，藉由適宜的變 更可在其他實施形態加以實施者。本實施形態的氣體燃燒 裝置1是能夠作爲吹風機；或使用於熱收縮管之收縮作 業、乾燥、接著、熔解、焊接等之熱風機等的氣體燃燒裝 置’或其他的機器類之氣體燃燒裝置來使用。 〔產業上的利用可能性〕 若根據本發明的話，因藉由減少外殼內的空氣量，使 得由噴射器所吸引的空氣量減少，混合氣體的空氣量減 少，而能提高氣體比率，所以能夠提昇由芯部所噴出的混 -16- (13) (13)200427948 合氣體之著火性。在著火後，能藉由增加外殼內的空氣 量，使燃燒器的燃燒氣體之燃燒效率提昇，可提升燃燒性 能，而能使C 0濃度減少。 又，若根據本發明的話，能夠僅以將送風機的輸出切 換成高輸出或低輸出之簡單方法，來提昇著火時的著火性 能，亦可提昇著火後的燃燒性能。 若根據本發明的話，因藉由減少外殼內的空氣量，使 得由噴射器所吸引的空氣量減少，混合氣體的空氣量減 少，而能提高氣體比率，所以能夠提昇由芯部所噴出的混 合氣體之著火性。在著火後’能藉由增加外殼內的空氣 量，使燃燒器的燃燒氣體之燃燒效率提昇，可提升燃燒性 能，而能使CO濃度減少。 【圖式簡單說明】 第1圖是顯示以往的氣體燃燒裝置的氣體燃燒之槪略 說明圖。 第2圖是內裝有以往的氣體燃燒裝置之吹風機的側斷 面圖。 第3圖是第2圖的噴射氣之部分斷面圖。 第4圖是第2圖的箭號觀看IV-IV線的燃燒器之正面 斷面圖。 第5圖是顯示本發明的實施形態之氣體燃燒裝置的氣 體燃燒之槪略說明圖。 第6圖是本發明的實施形態之氣體燃燒裝置的第7圖 -17- (14) (14)200427948 的箭號觀看VI-VI線的燃燒器之側斷面圖。 第7圖是由第6圖的左側觀看的氣體燃燒裝置之正面 斷面圖。 第8圖是由第6圖的右側觀看的氣體燃燒裝置之背面 斷面圖。 第9圖是顯示本發明的控制方法之流程圖。 〔圖號說明〕 1氣體燃燒裝置 3吹風機 5外殻 7噴射器 9 電極 1 1燃燒器 1 3外殼的出口 15送風機 1 7直流馬達 19托架 2 1軸流風扇 23 室 2 5 —次燃燒室 27二次燃燒室 29噴射器主體 3 1氣體供給管 -18- (15)200427948 3 3 噴嘴 3 5混合器 3 7 —次空氣孔部 3 9 芯部 4 1芯部座 4 3 電線 45溝槽部In order to achieve the above-mentioned object, the gas combustion device of the present invention is characterized by a burner for burning fuel gas supplied from a gas supply source, and adjusting the air in a cylindrical casing containing the burner. The air volume adjusting device ejects a mixed gas in which the fuel gas supplied to the burner from the gas supply source is mixed with the air in the casing to a core portion of the combustion chamber, and is used to eject the core gas from the core portion. The ignition device for ignition of the mixed gas, the ignition detection device for detecting that the mixed gas in the burner has been ignited, and at least the air volume adjustment device and the control device for the ignition device are controlled based on the signal of the ignition detection device. When the fire detection device does not detect a fire, the air volume adjustment device is controlled to reduce the amount of air in the housing, and when the fire detection device detects a fire, the air volume adjustment device is controlled to increase the housing. The amount of air inside. [Embodiment] A gas combustion control method and a gas combustion device according to an embodiment of the present invention will be described below with reference to the drawings. (5) (5) 200427948 In the following, an example is shown in which the gas combustion device 1 of this embodiment is built in the hair dryer 3. The hair dryer 3 has a cylindrical casing 5 having a substantially cylindrical shape. In a direction substantially orthogonal to the longitudinal direction of the casing 5, a long handle (not shown) is provided on the side wall surface of the casing 5, and the gas combustion device 1 is built in.于 mentioned outer shell 5. As shown in FIG. 6, the gas combustion device is provided with an injector 7 for mixing, for example, LPG and air as a combustion gas to generate a mixed gas; and an ignition device for igniting the mixed gas generated by the injector 7 An ignition device such as electrode 9; a burner 11 that burns a mixed gas ignited by electrode 9. Moreover, in the casing 5, a blower 15 for allowing the combustion air heated by the burner 11 to flow out to the outlet 13 side of the casing 5 is installed on the rear side of the injector 7 (in FIG. 6 is shown in FIG. 6) Right). The blower 15 functions as an air amount adjusting device that adjusts the amount of air inside the casing 5. The blower 15 'is composed of a DC motor 17 mounted on an inner wall surface of the rear side of the casing 5 through a bracket 19 having an air flow path, and an axial fan 21 for air blower provided on a rotating shaft of the DC motor 17. The rear end of the casing 5 (the right end in FIG. 6) is for safety reasons, and is covered with, for example, a wall surface provided with a plurality of holes for air intake. At the front end of the casing 5 (in FIG. 6 is (Left end), a hot air outlet nozzle (not shown) is detachably mounted. The burner n will be described in more detail with reference to FIGS. 7 and 8. The chamber 2 3 of the burner 1 1 is composed of aluminum (die-casting). In this embodiment, * 9-(6) (6) 200427948 The left and right sides of the long direction of the burner 1 1 are as shown in FIGS. 7 and 8. As shown, it is a substantially circular cylindrical body. The interior of the chamber 23 is composed of a primary combustion chamber 25 located at the rear (right side in Fig. 6); and a secondary combustion chamber 27 located in front of the primary combustion chamber 25 (left side in Fig. 6). . The injector 7 is provided on the gas introduction side behind the primary combustion chamber 25 (right side in Fig. 6). The above-mentioned injector 7 is provided with a nozzle 3 3 on the inlet side of the injector body 29 having a substantially cross-sectional cylindrical shape, and the nozzle is used to inject: a gas tank (not shown), such as LPG, which stores a combustion gas A gas supply source such as that supplied by a gas supply pipe 31 is a gas flow path. A spray hole (not shown) having a pinhole having a diameter of, for example, φ 60 μm to p 200 μm is provided at the tip of the nozzle 33. This injection hole is a hole located approximately in the center of a disc-shaped pinhole disc (not shown), and LPG is ejected from the injection hole at a high speed, which is thin and close to the speed of sound. A filter (not shown) is provided in the nozzle 33 to remove impurities or garbage which closes the spray control. Further, as the filter, for example, a sintered metal having a pinhole having a diameter of 10 to 30 μm can be used. In addition, the cross-sectional shape of the injector body may be appropriately changed. A mixer 3 5 for mixing LPG with outside air (primary air) and introducing it to the burner 1 1 is provided inside the injector body 29 in front of the nozzle 33, and penetrates through the side wall of the mixer 35 There are primary air holes 37 for sucking primary air from the outside. Therefore, a negative pressure is generated in the mixer 35 by the combustion gas sprayed from the nozzle 33 at high speed, and once the air is attracted from the outside, one side of the gas is -10- (7) (7) 200427948 Same as mixing, while being conveyed to the front as a gas combustion part such as the core part 39. This is called a spray effect. Furthermore, by adjusting the area of the primary air hole portion 37, the ratio of primary air can be adjusted. As described later, the primary air supplied to the housing 5 per unit time can also be adjusted by the output of the DC motor 17 controlled by the control device 55. The core portion 39 is a gas combustion portion, and is formed into a cylindrical shape with, for example, a 50 to 150 mesh SUS wire mesh. The core portion 39 is attached to the tip of the injector body 2 9 by welding, for example, and is provided in the burner 1. The sixth illustration of the primary combustion chamber 25 of 1 is the approximate center portion on the right. Further, at the front end of the core portion 39, for example, a core seat 41 serving as a straight-forward suppression portion is attached by welding. Through the core seat 41, the mixed gas ejected from the mixer 35 is mainly guided to the side (direction AR1 in FIG. 6), and is discharged from the mesh of the core 39 by the LPG and air. Composition of mixed gas. Furthermore, the flame after the fire formed a blue and approximately circular shape. The electrode 9 is provided inside the burner 11 at a position close to the front side surface of the core portion 39. High voltage electricity generated by a piezoelectric element (not shown) for ignition is inputted to the electrode 9 through the electric wire 4 3 to cause a spark to fly from the tip of the electrode 9 to the core 39. The spark ignites the mixed gas sprayed from the core 39, and the gas is burned. Further, as shown in Fig. 7, a plurality of groove portions 45 extending in the front-rear direction are provided on the inner wall of the primary combustion chamber 25 in the radial direction around the core portion 39. In FIG. 7, groove portions 45 are formed in six places. Further, a plurality of secondary air for supplying external air (secondary (8) (8) 200427948 air) to the primary combustion chamber 25 is provided on a rear wall portion (right side wall in FIG. 6) of the primary combustion chamber 25孔 部 46。 The hole portion 46. The plurality of secondary air hole portions 46 are arranged to supply the secondary air to the fired mixed gas at a position other than the fire portion. It should be noted that the above-mentioned igniting portion refers to a region where the sparks fly, as shown in a range surrounded by a broken line in FIG. 7, around the core portion 39 and on the electrode 9 side. In addition, in this embodiment, secondary air hole portions 46 are provided in five places in total. Also, for example, a plurality of tertiary air ducts 4 7 serving as tertiary air holes for supplying external air (tertiary air) to the secondary combustion chamber 2 7 are primary combustion chambers 2 5 provided between the groove portions 4 5. In this wall, a total of six tertiary air ducts 47 are provided in this embodiment. An opening is provided at the front end of the secondary combustion chamber 27. This opening portion forms a combustion gas outlet 49 for exhausting the combustion gas burned in the secondary combustion chamber 27. A plurality of heat sinks 51 for heat exchange are provided on the outer peripheral side of the chamber 23. The heat sink 51 is used to cool the chamber 23 by releasing the heat generated when the indoor mixed gas is burned. Therefore, due to the effect of heat exchange, the heat of the chamber 23 is released, and the released heat can be efficiently transmitted to the air flow sent by the axial fan 21. A fire detection device (fire sensor) 53 is provided inside the casing 5 (or handle portion) near the combustion gas outlet 49 of the burner 11. This detection device detects the gas (LPG) in the burner 11. ) Is it on fire? Also, inside the housing 5, a control device 5 5 is provided. This control device is detected by the ON / OFF operation of the DC motor 17 and a fire detection -12- (9) (9) 200427948 device 5 3 A detection signal 'that the gas of the burner 11 is on fire' controls the rotation speed of the DC motor 17 and ON / OFF controls the energization of the electrode 9 as a fire device. In detail, the 'control device 55' performs different control during the ignition and after the ignition. In other words, in order to reduce the amount of air in the casing 5 and make it easy to catch fire during a fire, a low-output operation (L 0 w operation) that reduces the number of rotations of the DC motor 17 is performed. In addition, the control device 5 5 performs a high-output operation (Hi operation) for increasing the number of rotations of the DC motor 17 in order to reduce the concentration of C 0 in the state after the ignition, in order to reduce the concentration of C 0 based on the ignition signal detected by the ignition sensor 5 3. ) To increase the amount of air in the casing 5. The control device 55 is electrically connected to a power source, a DC motor 17, an electrode 9, and a fire sensor 53. The control device 55 can also control the opening and closing operation of a switching valve (not shown) for supplying and stopping the fuel gas. Hereinafter, the operation of the control device 55 and the flow from the operation of this embodiment to the stop will be described with reference to Fig. 9. First, when the operation switch (not shown) is turned ON (step 1), the ON signal is sent to the control device 5 5 ', and the control device 5 5 gives a command to the burner 11 of the blower 15 to be energized. Supply air is started (step 2). At the time point of step 2, because the LPG is not supplied to the burner 11 and the ignition detection signal output by the ignition sensor 53 is OFF, the control device 5 5 gives a command to lower the rotation of the DC motor 17 and the control device 5 5 The amount of air in the interior is reduced, and low-output operation is performed (step 3). Next, the on-off valve (not shown) of the gas supply pipe 31 is opened, and LPG as a fuel gas is supplied from the gas supply source through the gas supply pipe 31 to the burner ii -13- (10) (10) 200427948 injector 7 nozzle 33 (step 4). When LPG is supplied to the nozzle 3 3 of the ejector 7 through the gas supply pipe 31, the LPG passes through the filter inside the nozzle 3 3 and is ejected from the injection hole as a hole to the mixer 35 at a speed close to the speed of sound. Therefore, the mixer 3 5 receives the negative pressure generated according to the injection effect, and the primary air (corresponding to the air-fuel ratio) required for combustion is sucked by the primary air hole portion 3 7 and flows into the mixer 3 5 (step 5). The primary air flowing in step 5 is mixed with the LPG to form a mixed gas, and is ejected toward the core portion 39 forward (step 6). Furthermore, in step 6, the mixer 35 automatically draws the primary air required for combustion in proportion to the increase or decrease of the LPG. However, since the DC motor 17 is operated at a low output by the control device 55 inside the casing 5, the amount of air is reduced as combustion air at the time of fire, so it is shown by a small arrow in FIG. 5 The amount of primary air sucked by the primary air holes 37 is also reduced. Therefore, since the gas ratio is high, a mixed gas having a good ignition shape is ejected toward the core portion 39 forward. At the core portion 39, the core seat 4 is provided at the front end surface, so the mixed gas is mainly ejected from the side mesh SUS wire mesh toward the surroundings. Next, a command is given by the control device 55, and the high-voltage electricity from the ignition piezoelectric element is energized through the electric wire 43, and a spark is generated by the electrode 9 in the burner 11 so that the ignition characteristics emitted by the core portion 39 are good The mixed gas is on fire (step 7). Furthermore, the time of ignition, that is, the time from the end of step 6 to the execution of step 7, is appropriately changed in accordance with the apparatus adapted to the present invention. -14-(11) (11) 200427948 More. That is, considering the volume of the casing 5 and the like, the most appropriate ignition timing of each device is determined. In addition, most of the combustion flames are extended from the side of the core portion 39 to the outside in a circular shape, and the length of the combustion flame reaches about ten nim from the core portion 25. The warm wind is along the primary combustion chamber 25. The six groove portions 45 on the inner and inner walls are gradually transmitted to the secondary combustion chamber 27 in the front. Next, ON / OFF of the ignition signal is determined (step 8). When the combustion gas is discharged from the combustion gas outlet 49 in front of the secondary combustion chamber 27, the ignition sensor 5 3 located near the combustion gas outlet 49 detects the combustion of the gas in the burner 11 (YES in step 8). Situation). By sending this ignition detection signal to the control device 5 5, a high-output operation is started according to a command from the control device 5 5 (step 9), and the number of rotations of the DC motor 17 is increased, so the amount of air in the housing 5 increase. When the ignition detection signal is not ON in step 8, that is, when the ignition has not started, the process returns to step 7. When the high-output operation is started, as shown by a large arrow in Fig. 5, as the combustion air during combustion, the amount of primary air attracted by the primary air holes 37 increases. Therefore, the air mixing rate of the mixed air of the mixer 35 becomes higher. 'A mixture gas having a good combustion performance is ejected from the core portion 39'. The combustion reaction of the gas in the primary combustion chamber 25 is promoted and the combustion performance is improved. In addition, in the primary combustion chamber 25, in order to increase the amount of air inside the casing 5 to improve combustion efficiency, secondary air is introduced through five secondary air hole portions 46 (step 10). As a result, the combustion reaction of the gas in the primary combustion chamber 25 is promoted, and the combustion performance is further improved. • 15- (12) (12) 200427948 And in the secondary combustion chamber 27, in order to increase the amount of air inside the casing 5, the tertiary air is introduced through six tertiary air pipes 47 (tertiary air holes) (step 11) . The tertiary air efficiently reduces the temperature of the wall portion of the primary combustion chamber 25, and is introduced into the secondary combustion chamber 27 after being heated to a high temperature when passing through the tertiary air line 47. As a result, the combustion reaction of the gas in the secondary combustion chamber 27 is promoted, and the combustion performance is improved. That is, since the gas that has been burned in the primary combustion chamber 25 is mixed with the tertiary air that has been increased by the amount of air that has been subjected to high temperatures, the combustion reaction becomes easier and the effect of complete combustion is easily achieved. Thereby, the combustion performance is improved, and the C Ο concentration is reduced. On the other hand, when the operation switch is turned OFF (step 12), the DC motor 17 is stopped by the control device 55, and the on-off valve (not shown) of the gas supply pipe 31 is closed (step 13). As a result, the supply path of the LPG is blocked, and the operation of the combustion gas device is stopped. The present invention is not limited to those described in the foregoing embodiments, and may be implemented in other embodiments by appropriate changes. The gas combustion device 1 of this embodiment can be used as a blower, or a gas combustion device such as a heat blower used for shrinking, shrinking, drying, fusing, welding, etc. of a heat shrinkable tube, or a gas combustion device of other equipment. use. [Industrial Applicability] According to the present invention, by reducing the amount of air in the casing, the amount of air attracted by the ejector is reduced, the amount of air in the mixed gas is reduced, and the gas ratio can be increased. Improve the ignitability of the mixed -16- (13) (13) 200427948 gas mixture sprayed from the core. After the fire, by increasing the amount of air in the casing, the combustion efficiency of the combustion gas of the burner can be improved, the combustion performance can be improved, and the C 0 concentration can be reduced. In addition, according to the present invention, it is possible to improve the ignition performance at the time of ignition and the combustion performance after the ignition by simply changing the output of the blower to a high output or a low output. According to the present invention, by reducing the amount of air in the casing, the amount of air attracted by the ejector is reduced, the amount of air in the mixed gas is reduced, and the gas ratio can be increased. Therefore, the mixture ejected from the core can be increased Ignition of gas. After a fire ’can increase the amount of air in the casing to increase the combustion efficiency of the combustion gas of the burner, improve the combustion performance, and reduce the CO concentration. [Brief Description of the Drawings] Fig. 1 is a schematic explanatory view showing the gas combustion of a conventional gas combustion device. Fig. 2 is a side sectional view of a hair dryer incorporating a conventional gas combustion device. FIG. 3 is a partial cross-sectional view of the injection gas in FIG. 2. Fig. 4 is a front sectional view of the burner viewed from the line IV-IV by the arrow in Fig. 2. Fig. 5 is a schematic explanatory view showing gas combustion in a gas combustion device according to an embodiment of the present invention. Fig. 6 is a sectional view of the burner taken along line VI-VI of the gas burner according to the seventh embodiment of the present invention. Fig. 7 is a front sectional view of the gas combustion device as viewed from the left side of Fig. 6. Fig. 8 is a rear cross-sectional view of the gas combustion device viewed from the right side of Fig. 6. Fig. 9 is a flowchart showing a control method of the present invention. [Illustration of figure number] 1 gas combustion device 3 blower 5 casing 7 injector 9 electrode 1 1 burner 1 3 outlet of the casing 15 blower 1 7 DC motor 19 bracket 2 1 axial fan 23 chamber 2 5-secondary combustion chamber 27 Secondary combustion chamber 29 Injector body 3 1 Gas supply pipe-18- (15) 200427948 3 3 Nozzle 3 5 Mixer 3 7 Secondary air hole 3 9 Core 4 1 Core seat 4 3 Wire 45 groove unit
4 6二次空氣孔部 4 7三次空氣管路 49燃燒氣體出口 51散熱片 5 3著火感應器 55控制裝置 101吹風機 103氣體燃燒裝置4 6 Secondary air hole 4 7 Three-time air line 49 Combustion gas outlet 51 Radiator 5 3 Ignition sensor 55 Control device 101 Blower 103 Gas combustion device
1 〇 5燃燒器 1 〇 7外殼 109托架 107氣體流通路 109吸引口 1 1 1馬達 1 13風扇 115送風機 1 1 7外殼的出口 -19- (16) (16)200427948 1 1 9氣體流通路 121吸引口 1 2 3 噴射器 1 25 噴嘴 1 2 7芯部 1 2 9 點火柱 1 3 1燃燒室 LPG液化石油氣1 〇5 burner 1 〇7 housing 109 bracket 107 gas flow path 109 suction port 1 1 1 motor 1 13 fan 115 blower 1 1 7 outlet of the housing -19- (16) (16) 200427948 1 1 9 gas flow path 121 Suction port 1 2 3 Injector 1 25 Nozzle 1 2 7 Core 1 2 9 Ignition pillar 1 3 1 Combustion chamber LPG LPG