JP2002349843A - Reverse flow prevention mechanism for exhaust flue - Google Patents
Reverse flow prevention mechanism for exhaust flueInfo
- Publication number
- JP2002349843A JP2002349843A JP2001155669A JP2001155669A JP2002349843A JP 2002349843 A JP2002349843 A JP 2002349843A JP 2001155669 A JP2001155669 A JP 2001155669A JP 2001155669 A JP2001155669 A JP 2001155669A JP 2002349843 A JP2002349843 A JP 2002349843A
- Authority
- JP
- Japan
- Prior art keywords
- prevention mechanism
- exhaust
- stopper
- backflow prevention
- mounting member
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Air Supply (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、 屋内設置式の給湯
器等の排気筒内に取付けられ前記排気筒内の空気が逆流
することを防止する逆流防止機構に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a backflow prevention mechanism which is mounted in an exhaust pipe of an indoor water heater or the like and prevents the air in the exhaust pipe from flowing back.
【０００２】[0002]
【従来の技術】屋内設置式の給湯器や暖房装置等には発
生する燃焼排気を屋外へ排出するための排気筒が設けら
れているが、前記排気筒は屋外と通じているため排出口
から屋外の冷たい空気が逆流して前記給湯器や暖房装置
の燃焼状態を悪化させたり、これらの装置を通じて冷た
い空気が屋内へ流入して室温を低下させてしまうことが
ある。2. Description of the Related Art An exhaust pipe for discharging generated combustion exhaust to the outside is provided in an indoor-installed water heater or a heating device, and the exhaust pipe communicates with the outside. The cold outdoor air may flow backward to deteriorate the combustion state of the water heater or the heating device, or the cold air may flow indoors through these devices to lower the room temperature.
【０００３】このような問題を解決するために、前記給
湯器や暖房装置等からの燃焼排気は屋外へ排出できるが
屋外の空気が前記排気筒を逆流することを防ぐ逆流防止
機構が排気筒内に取付けられている。このような逆流防
止機構の一例として、屋内設置式の給湯器９の頂面部に
連設された排気筒１に取付けられたものを図８に示して
いる。[0003] In order to solve such a problem, combustion exhaust gas from the water heater or the heating device can be discharged to the outside, but a backflow prevention mechanism for preventing outdoor air from flowing back through the exhaust tube is provided in the exhaust tube. Mounted on FIG. 8 shows an example of such a backflow prevention mechanism that is attached to the exhaust pipe 1 connected to the top surface of an indoor water heater 9.
【０００４】このものは、前記排気筒１の流路に直交し
て配設される回動軸３と、排気筒１の流路を閉塞可能で
あると共に前記回動軸３に回動自在に挿通保持される羽
根板４と、前記排気筒１の内壁に固定され前記回動軸３
の両端部を保持する一対の保持具５１，５１と、燃焼排
気の風圧によって排出方向へ回動される前記羽根板４を
所定角度で停止させる順風ストッパ５２と、前記流路を
閉塞する前記排気筒１の断面に水平な状態から前記羽根
板４が逆流方向へ回動することを阻止する逆風ストッパ
５３とから構成されている。[0004] The rotary shaft 3 is disposed orthogonal to the flow path of the exhaust pipe 1, and the flow path of the exhaust pipe 1 can be closed and rotatable about the rotary shaft 3. A blade plate 4 inserted and held; and a rotating shaft 3 fixed to an inner wall of the exhaust pipe 1.
A pair of holders 51, 51 for holding both ends of the blade, a forward wind stopper 52 for stopping the blade plate 4 rotated at a predetermined angle by the wind pressure of the combustion exhaust at a predetermined angle, and the exhaust for closing the flow path. A reverse wind stopper 53 for preventing the blade plate 4 from rotating in the reverse flow direction from a state horizontal to the cross section of the cylinder 1.
【０００５】このような構成であるため、前記給湯器９
から燃焼排気が排出される際には、燃焼排気の風圧によ
って前記羽根板４は、図８の中の破線で示されるよう
に、上方へ回動されて流路が開放される。このとき、押
上げられた前記羽根板４は前記排気筒１に固定された前
記順風ストッパ５２に当接して回動を停止される。次
に、屋外の排出口から空気が前記排気筒１内に逆流する
際には、前記逆風ストッパ５３により前記羽根板４の下
方への回動は阻止されるため、前記流路は閉塞状態に維
持される。また、燃焼排気の排出及び空気の逆流のない
自然状態においては、前記羽根板４は自重によって下方
へ回動され、前述の空気が逆流する場合と同様に、前記
逆風ストッパ５３により当接支持されるため前記流路は
閉塞される。これにより、前記給湯器９の燃焼排気はス
ムーズに屋外へと排出できると共に、屋外の排出口から
逆流する空気が前記給湯器９及び屋内へ流入することを
阻止できる。[0005] With such a configuration, the water heater 9
When the combustion exhaust gas is exhausted from the blade, the blade plate 4 is rotated upward by the wind pressure of the combustion exhaust gas to open the flow path as shown by the broken line in FIG. At this time, the pushed-up blade plate 4 comes into contact with the forward wind stopper 52 fixed to the exhaust pipe 1 and stops rotating. Next, when air flows backward into the exhaust pipe 1 from the outdoor exhaust port, the backward wind stopper 53 prevents the downward rotation of the blade plate 4, so that the flow path is closed. Will be maintained. Further, in a natural state where there is no discharge of combustion exhaust and no backflow of air, the blade plate 4 is rotated downward by its own weight, and is abutted and supported by the backwind stopper 53 in the same manner as in the case where the above-mentioned air flows backward. Therefore, the flow path is closed. Thus, the combustion exhaust gas of the water heater 9 can be smoothly discharged to the outside, and the air flowing backward from the outdoor outlet can be prevented from flowing into the water heater 9 and the room.
【０００６】しかし、この逆流防止機構は、排気筒１の
内壁にそれぞれ固定される一対の保持具５１，順風スト
ッパ５２，逆風ストッパ５３と、前記保持具５１に配設
される回動軸３と羽根板４とから構成されているため、
これを前記排気筒１内に取付けるためには、先ず、前記
排気筒１の所定位置に前記各部材５１，５２，５３を溶
接によりそれぞれ固定させた後、前記羽根板４を挿通保
持した回動軸３を前記保持具５１，５１に配設しなけれ
ばならないため手間がかかる。However, the backflow prevention mechanism includes a pair of holding members 51, a forward wind stopper 52, and a backward wind stopper 53, which are fixed to the inner wall of the exhaust pipe 1, and the rotating shaft 3 disposed on the holding member 51, respectively. Because it is composed of the blade 4
In order to mount this inside the exhaust pipe 1, first, the members 51, 52, 53 are fixed to predetermined positions of the exhaust pipe 1 by welding, respectively, and then the wing plate 4 is inserted and held. Since the shaft 3 must be disposed on the holders 51, 51, it is troublesome.
【０００７】また、前記各部材５１，５２，５３を前記
排気筒１の所定位置にそれぞれ正確に固定させるのは煩
雑であると共に、前記各部材５１，５２，５３の配設位
置がズレることも多いため、各部材相互間の位置関係に
ズレが生じ前記羽根板４の回動や流路の閉塞等に支障を
きたすことがある。Further, it is troublesome to accurately fix the members 51, 52, 53 at predetermined positions of the exhaust pipe 1, respectively, and the arrangement positions of the members 51, 52, 53 may be shifted. Because of the large number, the positional relationship between the members may be displaced, which may hinder the rotation of the blade plate 4 or blockage of the flow path.
【０００８】[0008]
【発明が解決しようとする課題】本発明は、『排気筒内
の空気の逆流を防止するために前記排気筒内に取付けら
れる逆流防止機構』において、排気筒内への逆流防止機
構の取付けが容易であることを課題とする。SUMMARY OF THE INVENTION The present invention relates to a "backflow prevention mechanism mounted in the exhaust cylinder for preventing the backflow of air in the exhaust cylinder", wherein the backflow prevention mechanism is mounted in the exhaust cylinder. The task is to be easy.
【０００９】[0009]
【課題を解決するための手段】＊１項 上記課題を解決するための本発明の技術的手段は、『前
記排気筒に内接する取付け部材と、前記排気筒の流路に
直交するように前記取付け部材に配設される回動軸と、
前記流路を閉塞可能であると共に前記回動軸に保持され
る羽根板とから構成され、前記羽根板は、重心から外れ
た位置において前記回動軸に保持されており、前記取付
け部材には、燃焼排気により前記羽根板が排出方向へ回
動する際に前記羽根板の回動を所定角度で停止させる順
風ストッパと、前記流路を閉塞する状態から前記羽根板
が逆流方向へ回動することを阻止する逆風ストッパとが
設けられている』ことである。Means for Solving the Problems * 1 The technical means of the present invention for solving the above-mentioned problem is that the technical means of the present invention is as follows: "the mounting member inscribed in the exhaust pipe and the A rotating shaft provided on the mounting member;
A vane plate capable of closing the flow path and held by the rotating shaft, the blade plate being held by the rotating shaft at a position deviated from the center of gravity, and A forward wind stopper for stopping rotation of the blade at a predetermined angle when the blade rotates in the discharge direction due to combustion exhaust, and the blade rotates in a backward flow direction from a state in which the flow path is closed And a reverse wind stopper is provided to prevent this. "
【００１０】上記技術的手段は次のように作用する。上
記手段によれば、この排気筒を通じて燃焼排気が排出さ
れるときには、前記燃焼排気の風圧により羽根板が排出
方向へ回動されて流路が開放され、前記排気筒内を空気
が逆流するときには、逆風ストッパにより逆流方向への
前記羽根板の回動が阻止され前記流路が閉塞されるた
め、従来例と同様に、排出方向へは燃焼排気をスムーズ
に排出させ、前記排気筒内での空気の逆流を阻止するこ
とができる。The above technical means works as follows. According to the above-described means, when the combustion exhaust is discharged through the exhaust stack, the blade plate is rotated in the discharge direction by the wind pressure of the combustion exhaust to open the flow path, and when air flows backward in the exhaust stack, Since the rotation of the blade plate in the backward flow direction is blocked by the backward wind stopper and the flow passage is closed, the combustion exhaust gas is smoothly discharged in the discharge direction, as in the conventional example, and The backflow of air can be prevented.
【００１１】本発明において、前記羽根板と回動軸とが
前記取付け部材に配設されると共に、前記羽根板の各方
向への回動範囲を調節する順風ストッパと逆風ストッパ
とが前記取付け部材に配設される構成であるため、前記
排気筒の外側において前記取付け部材に前記回動軸と羽
根板を配設させて逆流防止機構を完成させた後、これを
前記排気筒内に挿入させて所定位置に固定させることで
取付けることができる。In the present invention, the blade plate and the rotation shaft are provided on the mounting member, and the forward wind stopper and the reverse wind stopper for adjusting the rotation range of the blade plate in each direction are provided on the mounting member. After the rotation shaft and the wing plate are disposed on the attachment member outside the exhaust cylinder to complete the backflow prevention mechanism, this is inserted into the exhaust cylinder. It can be attached by fixing it at a predetermined position.
【００１２】＊２項 １項において、『前記順風ストッパと逆風ストッパ及び
前記取付け部材は、共通の一枚の金属板によって一体形
成されている』ものでは、逆流防止機構を構成する部材
数が少ないため作業工程が少ないと共に製造コストが低
い。* 2. In item 1, in the item "the forward wind stopper, the backward wind stopper and the mounting member are integrally formed by a common single metal plate", the number of members constituting the backflow prevention mechanism is small. Therefore, the number of working steps is small and the manufacturing cost is low.
【００１３】＊３項 １項又は２項において、『前記逆風ストッパは前記羽根
板との当接部が先細に成形されている』ものでは、前記
逆風ストッパと羽根板との接触面積が小さいから、前記
排気筒内に生じたドレンが前記逆風ストッパと羽根板と
の当接部分に付着し凍結されるときにも燃焼排気の風圧
によって解離され易いため、逆流防止機構の動作不良等
が起こりにくい。* 3. In the item 1 or 2, in which the contact portion between the reverse wind stopper and the blade plate is tapered, the contact area between the reverse wind stopper and the blade plate is small. Also, even when the drain generated in the exhaust cylinder adheres to the contact portion between the reverse wind stopper and the blade plate and is frozen, it is easily dissociated by the wind pressure of the combustion exhaust gas. .
【００１４】＊４項 １項，２項又は３項において、『前記羽根板には前記逆
風ストッパとの当接部に突出部が形成されている』もの
では、３項と同様に前記羽根板と逆風ストッパとの接触
面積が小さいと共に、前記突出部に付着したドレンは前
記羽根板の平面部へ流れるため前記突出部にドレンが溜
まることがないからドレンの凍結による前記逆風ストッ
パと羽根板との固着が起こりにくい。そのため、逆流防
止機構の動作不良等が起こりにくい。* 4. In the item (1), item (2) or item (3), in the case where the blade has a protruding portion at a contact portion with the reverse wind stopper, as in item 3, The contact area between the back wind stopper and the back wind stopper is small, and the drain attached to the protruding portion flows to the flat portion of the blade plate, so that the drain does not accumulate in the protruding portion. Is less likely to stick. Therefore, malfunction of the backflow prevention mechanism is unlikely to occur.
【００１５】[0015]
【発明の効果】本発明は、上記構成であるから次の特有
の効果を有する。本発明の排気筒の逆流防止機構におい
ては、排気筒の外側において取付け部材に回動軸及び羽
根板を配設させて逆流防止機構を完成させた後、これを
前記排気筒内に挿入させて所定の位置に固定することが
できるため、前記排気筒への逆流防止機構の取付けが容
易である。According to the present invention having the above configuration, the following specific effects are obtained. In the exhaust gas backflow prevention mechanism of the present invention, a rotation shaft and a blade plate are arranged on a mounting member on the outside of the exhaust cylinder to complete the backflow prevention mechanism, and then inserted into the exhaust cylinder. Since it can be fixed at a predetermined position, it is easy to attach the backflow prevention mechanism to the exhaust stack.
【００１６】さらに、前記羽根板を保持する前記取付け
部材に前記順風ストッパと逆風ストッパとが設けられて
いるため、従来例のように、前記排気筒内へ固定する際
に各部材相互間の位置関係にズレが生じることがない。Further, since the forward wind stopper and the backward wind stopper are provided on the mounting member for holding the blade plate, the position between the members when fixing in the exhaust cylinder as in the conventional example is increased. There is no deviation in the relationship.
【００１７】また、前記取付け部材に前記回動軸及び羽
根板を取付けて逆流防止機構を完成させた段階で、前記
羽根板の回動や前記順風ストッパ及び逆風ストッパによ
る前記羽根板の回動停止等を予めテストできるため、逆
流防止機構の動作不良の修理や調整が容易である。At the stage when the rotation shaft and the blade are attached to the mounting member to complete the backflow prevention mechanism, the rotation of the blade and the rotation stop of the blade by the forward wind stopper and the reverse wind stopper are stopped. And the like can be tested in advance, so that it is easy to repair or adjust the malfunction of the backflow prevention mechanism.
【００１８】さらに上記の効果に加えて、２項において
は、作業工程が少ないと共に製造コストが低い。また、
前記排気筒への挿入及び取付けが容易である。３項又は
４項においては、逆流防止機構の動作不良等が起こりに
くい。Further, in addition to the above-described effects, in item 2, the number of working steps is small and the manufacturing cost is low. Also,
It is easy to insert and attach to the exhaust stack. In item 3 or 4, operation failure of the backflow prevention mechanism is unlikely to occur.
【００１９】[0019]
【発明の実施の形態】次に、上記した本発明の実施の形
態を図面に従って詳述する。本発明実施の形態の一例で
ある排気筒の逆流防止機構を備えた屋内設置式の給湯器
を図１に示している。この例の逆流防止機構は、図１に
示されるように、前記給湯器９の頂面部に縦向きに連設
される短い排気筒１内に取付けられており、前記排気筒
１の燃焼排気の排出口側の端部には屋外へ通じるダクト
８が接続されている。Next, embodiments of the present invention will be described in detail with reference to the drawings. FIG. 1 shows an indoor-installed water heater provided with an exhaust stack backflow prevention mechanism as an example of an embodiment of the present invention. As shown in FIG. 1, the backflow prevention mechanism of this example is mounted in a short exhaust pipe 1 vertically connected to the top surface of the water heater 9, and the exhaust gas of the exhaust pipe 1 is discharged. A duct 8 that leads to the outside is connected to the end on the discharge port side.
【００２０】このものは、図２及び図３に示されるよう
に、前記排気筒１に略半周にわたって内接する取付け部
材２と、前記排気筒１の流路に直交するように前記取付
け部材２に配設される回動軸３と、前記流路を閉塞可能
であると共に前記回動軸３に回動自在に挿通保持される
羽根板４とから構成されており、前記取付け部材２に
は、前記給湯器９からの燃焼排気によって排出方向へ回
動される前記羽根板４を所定角度で停止させる順風スト
ッパ２０と、前記羽根板４を流路を閉塞する状態から逆
流方向へ回動することを阻止する逆風ストッパ２１とが
一体形成されている。As shown in FIGS. 2 and 3, the mounting member 2 is inscribed in the exhaust cylinder 1 over substantially half a circumference, and the mounting member 2 is orthogonal to the flow path of the exhaust cylinder 1. A rotating shaft 3 disposed therein, and a blade plate 4 capable of closing the flow passage and being rotatably inserted into and held by the rotating shaft 3. The mounting member 2 includes: A forward wind stopper 20 for stopping the blade plate 4 which is rotated in the discharge direction by the combustion exhaust gas from the water heater 9 at a predetermined angle, and rotating the blade plate 4 in a backward flow direction from a state in which a flow path is closed; Is formed integrally with the reverse wind stopper 21 for preventing the air flow.
【００２１】前記取付け部材２は、図３及び図４に示さ
れるように、前記排気筒１の略半周に内接される半円形
の帯状部材であり、その両端部には前記回動軸３を水平
に貫通保持させるための一対の保持板２３，２３と、前
記保持板２３の端縁側において前記排気筒１に内接して
前記取付け部材２を前記排気筒１に内接状態となるよう
に支持する支持片２４，２４が形成されている。As shown in FIGS. 3 and 4, the mounting member 2 is a semicircular band-shaped member inscribed in substantially half the circumference of the exhaust pipe 1, and the rotating shaft 3 is provided at both ends thereof. And a pair of holding plates 23, 23 for horizontally penetrating and holding the mounting member 2 at the edge side of the holding plate 23 so that the mounting member 2 is in contact with the exhaust tube 1. Support pieces 24, 24 for supporting are formed.
【００２２】前記取付け部材２の中央には、図３及び図
４に示されるように、これに保持される羽根板４の板面
に前記排気筒１の排出口側から垂直に当接するように前
記取付け部材２の周壁を内側に切り起こして形成される
逆風ストッパ２１が設けられており、前記逆風ストッパ
２１は、前記羽根板４に当接して前記羽根板４が前記排
気筒１の断面に対して水平に支持するように設定されて
いる。前記逆風ストッパ２１の下端部には、図２に示さ
れるように、前記羽根板４の周縁部に点接触する先細の
小突片２１０が成形されている。At the center of the mounting member 2, as shown in FIGS. 3 and 4, the mounting member 2 is vertically contacted with the plate surface of the blade plate 4 held by the blade from the discharge port side of the exhaust pipe 1. A reverse wind stopper 21 formed by cutting and raising the peripheral wall of the mounting member 2 inward is provided. The reverse wind stopper 21 comes into contact with the blade plate 4 so that the blade plate 4 crosses the cross section of the exhaust pipe 1. It is set so as to support horizontally. As shown in FIG. 2, a tapered small protruding piece 210 that makes point contact with the peripheral edge of the blade plate 4 is formed at the lower end of the head stopper 21.
【００２３】また、前記保持板２３は、図４に示される
ように、前記排気筒１の排出口側の下端部が切り欠かれ
た構成となっており、その下端縁は前記羽根板４が排出
方向へ回動される際にその周縁部に当接して前記羽根板
４の回動を停止させる順風ストッパ２０，２０となって
いる。As shown in FIG. 4, the holding plate 23 has a structure in which the lower end of the exhaust pipe 1 on the discharge port side is cut off, and the lower end edge of the holding plate 23 is The forward wind stoppers 20 stop rotation of the blade plate 4 by abutting on the peripheral portion when the blade is rotated in the discharge direction.
【００２４】前記羽根板４は、図３に示されるように、
前記排気筒１の断面積よりも一回り小さい径の円形であ
り、前記取付け部材２の形状に合わせて周縁部分を成形
されている。また、前記羽根板４には前記回動軸３を挿
通するためのシャフトガイド４０，４０が形成されてい
る。The blade 4 is, as shown in FIG.
It is a circle having a diameter slightly smaller than the cross-sectional area of the exhaust pipe 1, and a peripheral portion is formed in accordance with the shape of the mounting member 2. Shaft guides 40, 40 through which the rotating shaft 3 is inserted are formed in the blade plate 4.
【００２５】＊逆流防止機構の取付け 次に、排気筒１への逆流防止機構の取付けについて説明
する。先ず、前記回動軸３を前記羽根板４のシャフトガ
イド４０，４０に挿通しこれを保持させ、前記取付け部
材２の保持板２３，２３に形成された孔２６，２６に貫
通させて前記保持板２３，２３相互間に架橋状に保持さ
せた後、前記保持板２３，２３の外側に突出された前記
回動軸３の両端部３０，３０を押し潰して前記孔２６，
２６を挿通不能とし前記保持板２３，２３に抜け止め状
態に保持させる。これにより逆流防止機構が完成され
る。Next, the mounting of the backflow prevention mechanism on the exhaust pipe 1 will be described. First, the rotation shaft 3 is inserted into the shaft guides 40, 40 of the blade plate 4 to be held therein, and is passed through the holes 26, 26 formed in the holding plates 23, 23 of the mounting member 2 to thereby hold the shaft. After being held in a bridge between the plates 23, 23, both ends 30, 30 of the rotating shaft 3 protruding outside the holding plates 23, 23 are crushed to crush the holes 26, 23.
26 is made impossible to insert, and the holding plates 23, 23 are held in a retaining state. This completes the backflow prevention mechanism.
【００２６】次に、この逆流防止機構を流入口側から前
記排気筒１に挿入させて所定位置に配置させる。このと
き、前記排気筒１には、前記取付け部材２の位置決めす
るためのテーパ状の段差部Ｓが周回形成されているた
め、前記逆流防止機構を前記段差部Ｓの奥側へ一旦押し
込ませた後、前記取付け部材２を排気筒１に内接させた
状態で前記流入口側へ引き戻すと、図２に示されるよう
に、前記取付け部材２の端縁が前記段差部Ｓに係合され
る。そのため、前記逆流防止機構の所定位置への配置が
容易である。最後に、前記排気筒１と前記取付け部材２
との内接部分を数箇所スポット溶接させて前記排気筒１
の内壁に固定することにより前記排気筒１への前記逆流
防止機構の取付けは完了する。Next, the backflow prevention mechanism is inserted into the exhaust pipe 1 from the inflow side and arranged at a predetermined position. At this time, the tapered step S for positioning the mounting member 2 is formed in the exhaust pipe 1 so that the backflow prevention mechanism is once pushed into the depth side of the step S. Thereafter, when the attachment member 2 is pulled back to the inflow side with the attachment member 2 being in contact with the exhaust pipe 1, the edge of the attachment member 2 is engaged with the step portion S as shown in FIG. . Therefore, it is easy to arrange the backflow prevention mechanism at a predetermined position. Finally, the exhaust stack 1 and the mounting member 2
Spot welding the inscribed part with the exhaust pipe 1
The attachment of the backflow prevention mechanism to the exhaust pipe 1 is completed by fixing the backflow prevention mechanism to the exhaust pipe 1.
【００２７】このようにして前記排気筒１に取付けられ
た逆流防止機構は、自然状態においては、自重によって
下方へ回動しようとする前記羽根板４を前記逆風ストッ
パ２１の小突片２１０が上方から当接し水平状態に支持
するため、図２に示されるように、前記流路は閉塞され
た状態となる。In the natural state, the backflow prevention mechanism attached to the exhaust pipe 1 causes the small protruding piece 210 of the backwind stopper 21 to move the blade plate 4, which tends to rotate downward by its own weight, upward. As shown in FIG. 2, the flow path is in a closed state because the flow path is in contact with and supported in a horizontal state.
【００２８】＊逆流防止機構の実際の動作 次に、この逆流防止機構が前記排気筒１内において実際
に動作する場合について説明する。前記給湯器９から燃
焼排気が排出される場合には、下方からの前記燃焼排気
の風圧によって前記羽根板４は上方へ押上げられ、図５
に示されるように、前記排気筒１の流路が開放される。
このとき、押上げられた前記羽根板４は、前記取付け部
材２の保持板２３の順風ストッパ２０に当接され回動が
停止される。また、前記給湯器９からの燃焼排気の排出
が止ると前記羽根板４は自重によって下方へ回動され元
の前記流路を閉塞する状態に戻る。Actual Operation of Backflow Prevention Mechanism Next, a case where the backflow prevention mechanism actually operates in the exhaust pipe 1 will be described. When the combustion exhaust gas is discharged from the water heater 9, the blade plate 4 is pushed upward by the wind pressure of the combustion exhaust gas from below, and FIG.
As shown in (2), the flow path of the exhaust pipe 1 is opened.
At this time, the pushed-up blade plate 4 comes into contact with the forward wind stopper 20 of the holding plate 23 of the mounting member 2 and stops rotating. Further, when the discharge of the combustion exhaust gas from the water heater 9 stops, the blade plate 4 rotates downward by its own weight and returns to the state in which the original flow path is closed.
【００２９】次に、排気筒１の屋外の排出口から屋外の
空気が逆流する場合には、自然状態にある場合と同様
に、前記羽根板４は前記逆風ストッパ２１に当接支持さ
れ前記排気筒１の流路は閉塞状態に維持されるため、前
記給湯器９への外気の侵入は阻止される。これより、前
記給湯器９からの燃焼排気はスムーズに屋外へと排出で
きると共に、屋外の空気が排出口から逆流して前記給湯
器９及び屋内に流入することを阻止できる。Next, when outdoor air flows backward from the outdoor discharge port of the exhaust stack 1, the blade plate 4 is supported against the reverse wind stopper 21 and supported in the same manner as in a natural state. Since the flow path of the cylinder 1 is maintained in a closed state, intrusion of outside air into the water heater 9 is prevented. Thus, the combustion exhaust gas from the water heater 9 can be smoothly discharged to the outside, and the outdoor air can be prevented from flowing backward from the discharge port and flowing into the water heater 9 and the room.
【００３０】この例の逆流防止機構においては、前記逆
風ストッパ２１の前記羽根板４との当接部を先細の小突
片２１０としているため、前記逆風ストッパ２１と羽根
板４との接触面積が小さく、前記排気筒１内に生じたド
レンが前記突片２１０と羽根板４との当接部分に付着し
凍結するときにも、前記給湯器９から排出される燃焼排
気の風圧により前記逆風ストッパ２１と羽根板４とが解
離され易いため、前記燃焼排気の排出時に前記羽根板４
が前記逆風ストッパ２１に固着されて前記排気筒１の流
路が開放されずに、前記燃焼排気を屋外へ排出できない
という不都合が起こりにくい。In the backflow prevention mechanism of this embodiment, the contact portion of the reverse wind stopper 21 with the blade plate 4 is formed as a small tapered projection 210, so that the contact area between the reverse wind stopper 21 and the blade plate 4 is reduced. Even when the drain generated in the exhaust pipe 1 adheres to the contact portion between the protruding piece 210 and the blade plate 4 and freezes, the wind pressure of the combustion exhaust discharged from the water heater 9 causes the reverse wind stopper 21 and the blade plate 4 are easily dissociated from each other.
However, the inconvenience that the combustion exhaust gas cannot be discharged to the outside without being fixed to the reverse wind stopper 21 so that the flow path of the exhaust pipe 1 is not opened hardly occurs.
【００３１】この例においては、前記順風ストッパ２０
及び逆風ストッパ２１とが前記取付け部材２と一体的に
形成されているため、構成部材数が少なく作業工程が簡
単であると共に製造コストも低い。また、前記順風スト
ッパ２０を取付け部材２の側板２３に設けると共に前記
逆風ストッパ２１を前記排気筒１の排出口側から前記羽
根板４に当接するように設けたことにより、前記順風ス
トッパ２０と逆風ストッパ２１とが同じ半円内に形成さ
れるため、前記取付け部材２が半円形にコンパクト化さ
れている。In this example, the forward wind stopper 20
In addition, since the backwind stopper 21 is formed integrally with the mounting member 2, the number of constituent members is small, the working process is simple, and the manufacturing cost is low. In addition, the forward wind stopper 20 is provided on the side plate 23 of the mounting member 2 and the backward wind stopper 21 is provided so as to contact the blade plate 4 from the discharge port side of the exhaust pipe 1. Since the stopper 21 and the stopper 21 are formed in the same semicircle, the mounting member 2 is made compact in a semicircle.
【００３２】＊その他 前述の例において、前記回動軸３はその両端部３０，３
０を押し潰すことにより前記保持板２３，２３に抜止め
状態に保持されているが、図６に示されるように、前記
回動軸３の両端部３０，３０を外側から挟持させて前記
保持板２３，２３に抜止め状態とするものであってもよ
い。* Others In the above-described example, the rotating shaft 3 has both ends 30,3.
0 is crushed and held in the holding plates 23, 23 in a retaining state. As shown in FIG. 6, both ends 30, 30 of the rotating shaft 3 are clamped from the outside, and the holding is performed. The plate 23 may be in a retaining state.
【００３３】この例のものは、図４に示されるように、
前記取付け部材２の両端の支持片２４，２４の一部分を
上方に曲折させて前記回動軸３の両端部３０を外側から
挟持する一対の挟持片２５を形成させたものであり、図
６に示されるように、前記挟持片２５によって前記回動
軸３は貫通方向への移動範囲を制限されるため前記保持
板２３，２３に対して抜止め状態に保持される。このよ
うな構成としたものでは、前記回動軸３を取付け部材２
に配設させた後にその両端部３０，３０を押し潰すもの
よりも前記回動軸３の配設が簡単である。In this example, as shown in FIG.
A pair of holding pieces 25 for holding both ends 30 of the rotating shaft 3 from outside are formed by bending a part of the support pieces 24 at both ends of the mounting member 2 upward, and FIG. As shown, the range of movement of the rotating shaft 3 in the penetrating direction is restricted by the holding piece 25, so that the rotating shaft 3 is held in the retaining state with respect to the holding plates 23, 23. In such a configuration, the rotating shaft 3 is attached to the mounting member 2.
The arrangement of the rotating shaft 3 is simpler than that of crushing the both ends 30, 30 after the arrangement.
【００３４】前述の例において、前記羽根板４は、その
接触面積が小さくなるように前記逆風ストッパ２１の小
突片２１０により当接支持されているが、図７に示され
るように、前記羽根板面４の板面に突出部４２を形成さ
せて、これと逆風ストッパ２１とが当接される構成とし
てもよい。In the above-described example, the blade plate 4 is abutted and supported by the small protruding piece 210 of the reverse wind stopper 21 so that the contact area thereof is reduced. However, as shown in FIG. The projecting portion 42 may be formed on the plate surface of the plate surface 4, and the protruding portion 42 may be configured to be brought into contact with the reverse wind stopper 21.
【００３５】このものでは、図７に示されるように、前
記逆風ストッパ２１は矩形状に成形されており、この逆
風ストッパ２１によって当接支持される羽根板４には、
前記逆風ストッパ２１の下端縁と交差する所定の長さの
突出部４２が形成された構成となっている。そのため、
前記羽根板４は、図７に示されるように、前記逆風スト
ッパ２１の下端縁と前記突出部４２の頂部との点接触に
よって当接支持されている。In this embodiment, as shown in FIG. 7, the reverse wind stopper 21 is formed in a rectangular shape.
A protruding portion 42 having a predetermined length that intersects the lower edge of the reverse wind stopper 21 is formed. for that reason,
As shown in FIG. 7, the blade plate 4 is abutted and supported by point contact between the lower edge of the reverse wind stopper 21 and the top of the protrusion 42.
【００３６】このような構成としたものでは、前記突出
部４１に付着されたドレンは前記突出部４２に沿って前
記羽根板４の平面部へと流れるため、前記逆風ストッパ
２１との当接部にドレンが溜ることがなく前記逆風スト
ッパ２１と羽根板４とがドレンの凍結によって固着され
にくい。また、前述の例と同様に前記逆風ストッパ２１
と羽根板４との接触面積が小さいため、ドレンの凍結に
より固着されても前記燃焼排気の排出時の風圧によって
解離され易い。In such a configuration, the drain attached to the protruding portion 41 flows to the flat portion of the blade plate 4 along the protruding portion 42, so that the contact portion with the reverse wind stopper 21 is formed. Drain does not accumulate on the head, and the back wind stopper 21 and the blade plate 4 are not easily fixed by freezing of the drain. Further, similarly to the above-described example, the reverse wind stopper 21 is used.
Since the contact area between the air and the blades 4 is small, even if the drain is fixed by freezing, it is easily dissociated by the wind pressure at the time of discharging the combustion exhaust gas.
【図１】本発明実施の形態の排気筒の逆流防止機構を備
えた給湯器の説明図FIG. 1 is an explanatory view of a water heater provided with a backflow prevention mechanism for an exhaust stack according to an embodiment of the present invention.
【図２】図１の要部の拡大断面図FIG. 2 is an enlarged sectional view of a main part of FIG. 1;
【図３】図２のＩＩＩ−ＩＩＩ断面図FIG. 3 is a sectional view taken along the line III-III in FIG. 2;
【図４】排気筒の逆流防止機構に用いられる取付け部材
の側面図FIG. 4 is a side view of a mounting member used for a backflow prevention mechanism of an exhaust stack.
【図５】図２の排気筒の逆流防止機構の開状態を示す説
明図FIG. 5 is an explanatory view showing an open state of a backflow prevention mechanism of the exhaust cylinder of FIG.
【図６】その他の排気筒の逆流防止機構の断面図FIG. 6 is a sectional view of another exhaust gas backflow prevention mechanism.
【図７】その他の排気筒の逆流防止機構の断面図FIG. 7 is a cross-sectional view of another exhaust gas backflow prevention mechanism.
【図８】従来の排気筒の逆流防止機構の断面図FIG. 8 is a cross-sectional view of a conventional exhaust gas backflow prevention mechanism.
(1)・・・排気筒 (2)・・・取付け部材 (20)・・・順風ストッパ (21)・・・逆風ストッパ (210)・・・小突片 (3)・・・回動軸 (4)・・・羽根板 (42)・・・突出部 (S)・・・段差部 (1) ・ ・ ・ Exhaust cylinder (2) ・ ・ ・ Mounting member (20) ・ ・ ・ Forward wind stopper (21) ・ ・ ・ Backward wind stopper (210) ・ ・ ・ Small protruding piece (3) ・ ・ ・ Rotating shaft (4) ・ ・ ・ Blade plate (42) ・ ・ ・ Protrusion (S) ・ ・ ・ Step
Claims (4)
前記排気筒内に取付けられる逆流防止機構において、前
記排気筒に内接する取付け部材と、前記排気筒の流路に
直交するように前記取付け部材に配設される回動軸と、
前記流路を閉塞可能であると共に前記回動軸に保持され
る羽根板とから構成され、前記羽根板は、重心から外れ
た位置において前記回動軸に保持されており、前記取付
け部材には、燃焼排気により前記羽根板が排出方向へ回
動する際に前記羽根板の回動を所定角度で停止させる順
風ストッパと、前記流路を閉塞する状態から前記羽根板
が逆流方向へ回動することを阻止する逆風ストッパとが
設けられている、排気筒の逆流防止機構。1. A backflow prevention mechanism mounted in the exhaust cylinder for preventing a backflow of air in the exhaust cylinder, wherein a mounting member inscribed in the exhaust cylinder is perpendicular to a flow path of the exhaust cylinder. A rotating shaft disposed on the mounting member;
A blade plate capable of closing the flow path and held by the rotation shaft, wherein the blade plate is held by the rotation shaft at a position deviated from the center of gravity, and the mounting member includes A forward wind stopper for stopping rotation of the blade at a predetermined angle when the blade rotates in the discharge direction due to combustion exhaust, and the blade rotates in a backward flow direction from a state in which the flow path is closed A backflow prevention mechanism for the exhaust stack, which is provided with a backwind stopper for preventing the backflow.
において、前記順風ストッパと逆風ストッパ及び前記取
付け部材は、共通の一枚の金属板によって一体形成され
ている、排気筒の逆流防止機構。2. The exhaust cylinder backflow prevention mechanism according to claim 1, wherein the forward wind stopper, the backward wind stopper, and the mounting member are integrally formed by a single metal plate. mechanism.
止機構において、前記逆風ストッパは前記羽根板との当
接部が先細に成形されている、排気筒の逆流防止機構。3. The exhaust gas backflow prevention mechanism according to claim 1, wherein the contact portion between the backwind stopper and the blade plate is tapered.
流防止機構において、前記羽根板には前記逆風ストッパ
との当接部に突出部が形成されている、排気筒の逆流防
止機構。4. The exhaust gas backflow prevention mechanism according to claim 1, wherein the blade plate has a protruding portion at a contact portion with the reverse wind stopper. mechanism.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001155669A JP3905328B2 (en) | 2001-05-24 | 2001-05-24 | Exhaust tube backflow prevention mechanism |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2001155669A JP3905328B2 (en) | 2001-05-24 | 2001-05-24 | Exhaust tube backflow prevention mechanism |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JP2002349843A true JP2002349843A (en) | 2002-12-04 |
| JP3905328B2 JP3905328B2 (en) | 2007-04-18 |
Family
ID=18999808
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2001155669A Expired - Fee Related JP3905328B2 (en) | 2001-05-24 | 2001-05-24 | Exhaust tube backflow prevention mechanism |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3905328B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015011754A1 (en) * | 2013-07-22 | 2015-01-29 | リンナイ株式会社 | Composite combustion device |
| JP2020003148A (en) * | 2018-06-28 | 2020-01-09 | 株式会社パロマ | Water heater |
| KR102156708B1 (en) * | 2020-02-26 | 2020-09-16 | (주) 일렉트로스미스 | Projector housing |
-
2001
- 2001-05-24 JP JP2001155669A patent/JP3905328B2/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2015011754A1 (en) * | 2013-07-22 | 2015-01-29 | リンナイ株式会社 | Composite combustion device |
| AU2013395120B2 (en) * | 2013-07-22 | 2016-02-25 | Rinnai Corporation | Combined combustion device |
| US10024536B2 (en) | 2013-07-22 | 2018-07-17 | Rinnai Corporation | Combined combustion device |
| JP2020003148A (en) * | 2018-06-28 | 2020-01-09 | 株式会社パロマ | Water heater |
| JP7061366B2 (en) | 2018-06-28 | 2022-04-28 | 株式会社パロマ | Water heater |
| KR102156708B1 (en) * | 2020-02-26 | 2020-09-16 | (주) 일렉트로스미스 | Projector housing |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3905328B2 (en) | 2007-04-18 |
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