JPS5939657B2 - hot air generator - Google Patents

Description

【発明の詳細な説明】 本発明は葉タバコ、イ草などの乾燥機若しくは養蚕、養
豚、養鶏、園芸、育苗などに使用する暖房機・・・・・
・・・・等の熱風発生機に関するものである。[Detailed Description of the Invention] The present invention is a dryer for tobacco leaves, rushes, etc., or a heater for use in sericulture, pig farming, poultry farming, gardening, seedling raising, etc.
This relates to hot air generators such as...

在来型の熱風発生装置は第１図に示す如（、バーナー燃
焼によシ火炉２０で輻射の伝熱を行ない、そして燃焼ガ
スはその後段に設けた煙管群２１で対流の伝熱を行なう
ように燃焼ガス側に往路の回路を設けてあり、伝熱過程
を終えた燃焼ガスは排ガスとなって煙突２２へ導かれ排
出される。A conventional hot air generator, as shown in Fig. 1, uses a burner combustion to transfer heat by radiation in a furnace 20, and the combustion gas transfers heat by convection in a group of smoke pipes 21 provided at the subsequent stage. As such, an outgoing circuit is provided on the combustion gas side, and the combustion gas that has completed the heat transfer process becomes exhaust gas and is led to the chimney 22 and discharged.

一方被加熱の流体（空気）は煙管群２１及び火炉２０の
外周部に送風機２３で送風され、対流、接触しながら熱
交換され所定の温度に制御された熱風が乾燥室などへ乾
燥用熱源として送風される。On the other hand, the fluid to be heated (air) is blown by the blower 23 to the outer periphery of the smoke pipe group 21 and the furnace 20, and heat is exchanged through convection and contact, and the hot air, which is controlled to a predetermined temperature, is sent to a drying room as a heat source for drying. Air is blown.

斯様にこの在来型の熱風発生装置はバーナーで燃焼した
燃焼ガス側を多回路で構成し、被加熱流体側は通シいっ
ぺんのｌｐａ ｓｓ方式である。In this way, this conventional hot air generator is configured with multiple circuits on the side of the combustion gas combusted by the burner, and the side of the fluid to be heated is of the lpass type, which is a one-pass system.

従って熱風発生機の本体構造が複雑で大型となシ製作コ
スト高となシ、しかも構造が複雑であるため被加熱流体
（空気）の抵抗損失が太き（なシ送風機の駆動動力が大
きくなるなどの欠点がある。Therefore, the main body structure of the hot air generator is complicated and large, and the manufacturing cost is high.Furthermore, because the structure is complicated, the resistance loss of the heated fluid (air) is large (and the driving power of the blower becomes large). There are drawbacks such as.

そこで、本発明は斯る従来品の欠陥を除去せんとするも
のである。Therefore, the present invention aims to eliminate such defects of conventional products.

以上の目的を達成するための本発明の基本的構成は、筒
状ケーシング内にその外気吸入口側に凹窪状対流伝熱部
を有する火炉を配設すると共に火炉とケーシング内壁面
との間に突出口に連通ずる輻射加熱用流路を設け、この
火炉の対流伝熱部に整流ノズルで外気を当て、対流伝熱
によりこの外気を加熱し、次にこの加熱した外気を輻射
加熱用流路を流通せしめることにより輻射加熱せしめて
温風にする構造であシ、従来のｉｓ方式にａｓ 比べ加熱効率が極めて良（なるし、また、火炉における
最も過熱しオーバーヒートし易い対流伝熱部に整流ノズ
ルで外気を当て、火炉のオーバーヒートを防止し得るよ
うにしたものである。The basic structure of the present invention to achieve the above object is to arrange a furnace having a recessed convection heat transfer part on the outside air inlet side in a cylindrical casing, and to connect the furnace and the inner wall surface of the casing. A radiant heating flow path communicating with the outlet is provided in the furnace, outside air is applied to the convection heat transfer part of the furnace using a rectifying nozzle, the outside air is heated by convection heat transfer, and then this heated outside air is passed through the radiant heating flow. It has a structure in which radiant heating is performed by circulating the air to generate hot air, and the heating efficiency is extremely high compared to the conventional IS method. The rectifier nozzle directs outside air to prevent the furnace from overheating.

しかも火炉が円筒状で最も加熱温度が高い対流伝熱部に
整流ノズルで外気を集中的に当て、輻射加熱用流路で拡
散する構造であるため、突出口より突出される温風は均
一になシ、従来のごとき外気が火炉における加熱温度が
高い部分と低い部分とに対流。In addition, the furnace is cylindrical and has a structure in which outside air is concentrated on the convection heat transfer part where the heating temperature is highest through the rectifying nozzle and diffused through the radiant heating channel, so the hot air projected from the outlet is uniform. Unlike conventional methods, outside air is convected between areas of the furnace where the heating temperature is high and low.

接触し加熱温度が区区になり、その加熱温度が区区にな
った外気がそのまま乾燥室等に送風されることもない。There is no possibility that the heating temperature will vary due to contact, and the outside air whose heating temperature has varied will not be directly blown into the drying room or the like.

以下、本発明の実施例を図面にもとづいて説明すると、
第２図は第１発明を葉タバコ乾燥に使用した場合を示し
、図中ａは筒状ケーシングで、このケーシングａは葉タ
バコ乾燥室に連設する基礎に設置固定するものであり、
そのケーシングａの頂部にはダンパー１０によって開閉
する外気吸入口１を、また底部には葉タバコ乾燥室に連
通ずる吐出口９を夫々開穿する。Hereinafter, embodiments of the present invention will be described based on the drawings.
FIG. 2 shows the case where the first invention is used for drying leaf tobacco, and in the figure, a is a cylindrical casing, and this casing a is installed and fixed on a foundation connected to a leaf tobacco drying chamber.
The top of the casing a has an outside air inlet 1 opened and closed by a damper 10, and the bottom has an outlet 9 communicating with a leaf tobacco drying chamber.

そしてこのケーシングａ内の下部に円筒状火炉２を起立
する。A cylindrical furnace 2 is then erected in the lower part of the casing a.

火炉２は、その頂部、即ち外気吸入口１側の側端面に、
凹窪状の対流伝熱部２ａを設けると共にこの対流伝熱部
２ａの上部にケーシングａ外に突出せる煙突３を取付け
、且つ火炉２の下部にはバーナー４を装着する。The furnace 2 has a top portion, that is, a side end surface on the outside air intake port 1 side.
A recessed convection heat transfer section 2a is provided, a chimney 3 that can protrude outside the casing a is attached to the top of the convection heat transfer section 2a, and a burner 4 is attached to the bottom of the furnace 2.

そして、この火炉２外周壁と、前記ケーシングａ内面と
の間に防熱製の整流板８を張設して、輻射加熱用流路７
′Ｊｆｒ：形成する。A heat-insulating rectifying plate 8 is stretched between the outer circumferential wall of the furnace 2 and the inner surface of the casing a, and a radiation heating channel 7 is provided.
'Jfr: Form.

図中５は整流ノズル、６は外気吸入用の送風機を示し、
整流ノズル５はそのノズル口を前記火炉２内に向けて配
設する。In the figure, 5 indicates a rectifying nozzle, 6 indicates a blower for sucking outside air,
The rectifying nozzle 5 is arranged with its nozzle opening facing into the furnace 2.

従って送風機ｆｌ駆動させると外気吸入口１よシ外気が
ケーシングａ内に吸入され、整流ノズル５によって火炉
２０対流伝熱部２ａに送風される。Therefore, when the blower fl is driven, outside air is drawn into the casing a through the outside air intake port 1, and is blown to the convection heat transfer section 2a of the furnace 20 by the rectifying nozzle 5.

対流伝熱部２ａ内に送風された外気は矢印の如（対流伝
熱部２ａから輻射加熱用流路７を介して吐出口９に送風
され、葉タバコ乾燥室内に吐出される。The outside air blown into the convection heat transfer section 2a is blown from the convection heat transfer section 2a through the radiant heating channel 7 to the discharge port 9 as shown by the arrow, and is discharged into the leaf tobacco drying chamber.

従って外気は対流伝熱部２ａで加熱され、更に流路口を
通過することによシ火炉２の輻射熱で加温されて温風と
なりｔ燥室内に送風される。Therefore, the outside air is heated in the convection heat transfer section 2a, and further heated by the radiant heat of the furnace 2 as it passes through the flow path opening to become warm air and blown into the drying chamber.

図中１１は乾燥室の循環口で、この循環口１１より乾燥
終了後の空気をケーシングａ内に吸入し加熱して再度加
熱用熱源に供されるものである。In the figure, reference numeral 11 denotes a circulation port of the drying chamber, through which the air after drying is sucked into the casing a, heated, and used again as a heat source for heating.

第３図及至第７図は第２発明に係る熱風発生機を葉タバ
コ乾燥に利用したものを示す。3 to 7 show the hot air generator according to the second invention used for drying leaf tobacco.

即ち前記第１実施例における整流ノズル５の基部に整流
通気口５ａを開口したものであシ。That is, a rectifying air opening 5a is opened at the base of the rectifying nozzle 5 in the first embodiment.

この整流通気口５ａから全送風緻の６０％〜８０チ程度
が通風できるようにし、またこの整流通気口５ａからの
通風が直接輻射加熱用流路７へ送風されるような位置に
開口する。Approximately 60% to 80 of the total air flow can be ventilated through the rectified air vent 5a, and the opening is opened at a position such that the air from the rectified air vent 5a is directly blown to the radiant heating channel 7.

従ってノズル口５ｂから送風された外気は対流伝熱部２
ａに突き当シ加熱された後、整流通気口５ａからの送風
と合流して流路７内忙送風される。Therefore, the outside air blown from the nozzle port 5b is transferred to the convection heat transfer section 2.
After the air is heated when it abuts on air, it merges with the air from the rectified air outlet 5a and is actively blown inside the flow path 7.

そしてこの流路７を通過する際火炉２の輻射熱で加熱さ
れて温風となって吐出口９から葉タバコ乾燥室ＡＰ′３
に送風される。When passing through this flow path 7, it is heated by the radiant heat of the furnace 2 and becomes warm air, which flows from the discharge port 9 to the leaf tobacco drying chamber AP'3.
Air is blown to

一方、バーナー４の燃焼により、火炉２外周壁で輻射伝
熱を行い、対流伝熱部２ａで対流伝熱を行い、この伝熱
過程を終了して燃焼ガスは排ガスとなって煙突３へ導入
されて排出される。On the other hand, due to combustion in the burner 4, radiation heat is transferred on the outer peripheral wall of the furnace 2, and convection heat is transferred in the convection heat transfer section 2a, and after this heat transfer process is completed, the combustion gas becomes exhaust gas and is introduced into the chimney 3. and discharged.

そして第７図は葉タバコ乾燥状態を示すものである。FIG. 7 shows the state of tobacco leaf drying.

また第８図は第２発明に係る熱風発生機をハウス園芸に
使用した場合を示すものである。Moreover, FIG. 8 shows a case where the hot air generator according to the second invention is used for greenhouse horticulture.

即ち機体を横倒して外気吸入口１をケーシングａの一側
面に設け、他側面にバーナー４を装着し、また更に吐出
口９を上方に向けたものである。That is, the machine body is laid down, the outside air intake port 1 is provided on one side of the casing a, the burner 4 is attached to the other side, and the discharge port 9 is directed upward.

斯様にバーナー４の炎を対流伝熱部２ａに向けたものに
おいては該伝熱部２ａのオーバヒートを防止するために
ノズル口５ｂよシの通風量を前記実施例よシ大にせしめ
る。In the case where the flame of the burner 4 is directed toward the convection heat transfer section 2a in this manner, the amount of airflow through the nozzle opening 5b is increased compared to the previous embodiment in order to prevent the heat transfer section 2a from overheating.

第一発明は斜上の如（構成であるから、整流ノズルによ
って外気が火炉の凹窪状対流伝熱部に整然とリバースタ
ーンして加熱され、更に火炉外周壁の輻射熱によって加
熱されるため、従来の１ｐａｓ ｓ方式に較べ熱交換率
が極めて良い。The first invention has a diagonal upward configuration, so the outside air is heated by an orderly reverse turn to the concave convection heat transfer part of the furnace by the rectifying nozzle, and is further heated by the radiant heat of the outer peripheral wall of the furnace. The heat exchange rate is extremely good compared to the 1pass system.

更に凹窪状対流伝熱部に牧人外気は適圧で突き当るため
、騒音が発生する虞れがない。Furthermore, since the open air hits the recessed convection heat transfer section at an appropriate pressure, there is no risk of noise generation.

しかも、高温燃焼ガスが滞留する火炉の対流伝熱部に昇
流が整流ノズルによって、送風されるため、この対流伝
熱部の異常昇温を防止し核部の加熱、焼損を防止し火炉
の耐久性を向上し得ると共に、核部に牧人外気が送風さ
れるため、核部の熱が効率良（且つ均一に熱伝達される
。Moreover, since the rising current is blown by the rectifier nozzle to the convection heat transfer part of the furnace where high-temperature combustion gas remains, it prevents abnormal temperature rise in this convection heat transfer part and prevents heating and burnout of the core part of the furnace. Durability can be improved, and since the outside air is blown into the core, heat from the core is efficiently (and uniformly) transferred.

更に火炉は円筒体でその一側面に凹窪状対流伝熱部を設
けた構造であるから、構造が極めて簡単で低原価で提供
できる。Furthermore, since the furnace is a cylindrical body with a recessed convection heat transfer portion provided on one side thereof, the furnace is extremely simple in structure and can be provided at low cost.

【図面の簡単な説明】 第１図は従来例の熱風発生機を示し、第２図及至第８図
は本発明の実施例を示し、第２図は第１発明の一部を切
欠して示す縦断面図、第３図及至第８図は第２発明を示
し、第３図は一部切欠縦断面図、第４図はｘ−Ｘ線に沿
える断面図、第５図はｙｙ線に沿える断面図、第６図は
葉タバコ乾燥室Ａに設置した場合を一部切欠して示す平
面図、第７図はその一部切欠して示す正面図、第８図は
他の実施例の一部切欠断面図である。 図中、１は外気吸入口、２は火炉、２ａは火炉の対流伝
熱部、３は煙突、４はバーナー、５は整流ノズル、５ａ
は整流通風口、６は送風機を夫々示す。[BRIEF DESCRIPTION OF THE DRAWINGS] Fig. 1 shows a conventional hot air generator, Figs. 2 to 8 show embodiments of the present invention, and Fig. 2 shows a partially cutaway view of the first invention. 3 to 8 show the second invention, FIG. 3 is a partially cutaway longitudinal sectional view, FIG. 4 is a sectional view taken along the x-x line, and FIG. 5 is a yy line. 6 is a partially cutaway plan view showing the case installed in leaf tobacco drying chamber A, FIG. 7 is a partially cutaway front view, and FIG. 8 is another implementation. It is a partially cutaway sectional view of an example. In the figure, 1 is an outside air inlet, 2 is a furnace, 2a is a convection heat transfer part of the furnace, 3 is a chimney, 4 is a burner, 5 is a rectifier nozzle, 5a
6 indicates a rectified air outlet, and 6 indicates a blower.

Claims (1)

【特許請求の範囲】[Claims] １ 長手方向の一側面に外気吸入口を、その外気吸入口
の反対側面に吐出口を有する筒状ケーシングと、このケ
ーシング内に配設した円筒状火炉と、この火炉と外気吸
入口との間に設ける外気吸入用の送風機及び吐出口が断
面円形状の整流ノズルとから構成し、前記火炉にはその
整流ノズル側に凹部状に形成した対流伝熱部を設けると
共に該対流伝熱部側の外周壁にケーシング外より煙突を
連設し、且つその火炉の反対側にバーナを設け、更にこ
の火炉とケーシング内壁面との間に輻射加熱用流路を設
け、前記整流ノズルはその吐出口を対流伝熱部に向けて
配設してなる熱風発生機。1. A cylindrical casing having an outside air inlet on one longitudinal side and a discharge port on the opposite side of the outside air inlet, a cylindrical furnace disposed within this casing, and between this furnace and the outside air inlet. The furnace is provided with a convection heat transfer section formed in a concave shape on the side of the rectification nozzle, and a convection heat transfer section on the side of the convection heat transfer section. A chimney is connected to the outer circumferential wall from the outside of the casing, a burner is provided on the opposite side of the furnace, and a radiation heating passage is provided between the furnace and the inner wall surface of the casing, and the rectifying nozzle has its discharge port. A hot air generator installed facing the convection heat transfer section.