JP3805554B2

JP3805554B2 - Heating device with hot water heat exchanger

Info

Publication number: JP3805554B2
Application number: JP07048799A
Authority: JP
Inventors: 幸司入谷; 信治牛崎; 栄二本田
Original assignee: サンポット株式会社
Priority date: 1999-03-16
Filing date: 1999-03-16
Publication date: 2006-08-02
Anticipated expiration: 2019-03-16
Also published as: JP2000266349A

Description

【０００１】
【発明の属する技術分野】
本発明は、暖房器に温水暖房器を併設し、両者の熱源を共通にする温水熱交換器付き暖房装置に関する。
【０００２】
【従来の技術】
燃焼器の燃焼室からの排気を第１熱交換器内に導いて、該第１熱交換器の周囲から放出される熱を、該第１熱交換器の周囲の空気と熱交換させる暖房装置にあって、該暖房装置の第１熱交換器内に、温水放熱器との間に熱媒液を循環させる第２交換器を介在させた温水熱交換器付き暖房装置は知られている（特開平９−１９６３９０号公報）。
【０００３】
また、温水放熱器との間に熱媒液を循環させる熱交換器を排気通路に設け、該熱交換器側に流れる排気ガス量を可変するダンパを設け、該ダンパの開閉をモーターで行わせるものも知られている（実開昭６２−８８２１０号公報）。
【０００４】
【発明が解決しようとする課題】
しかし、これら公報に開示されているものは、燃焼室で燃焼が行われている間、常に第１熱交換器が燃焼室並びに第１熱交換器からの輻射熱や伝導熱を受けて加温される関係上、温水放熱器を使用しないときに第２熱交換器内で熱媒液が沸騰するといった不具合を生じる。
【０００５】
そこで、上記暖房装置では、温水放熱器と第２熱交換器とを接続する熱媒液の循環路に補助放熱器を設け、第２熱交換器を使用しないとき該補助放熱器から放熱させると共に、第１熱交換器内に、第２熱交換器を介して排気が流れる通路と、該第２熱交換器をバイパスして排気が流れる通路とを設け、温水放熱器を使用しないときダンパで第２熱交換器をバイパスする通路を選択して、第２熱交換器での熱媒液の沸騰を抑えるようにしている。
【０００６】
しかし、燃焼室並びに第１熱交換器での暖房のみを行っているとき、温水放熱器を使用し始めると、該第２熱交換器は燃焼器から熱気を完全に防ぐことはできず高温状態に保たれるため、温水放熱器から温度の低い熱媒液が第２熱交換器に流れ込んで、該第２熱交換器内で沸騰音を生じ、更に熱媒液の急激な体積の膨脹で第２熱交換器側に無理な力をかけ、これが第２熱交換器側の破損の原因となる等の不具合がある。
【０００７】
そこで、第１熱交換器による暖房のみを継続使用しているとき、温水放熱器を使い始めるときは、燃焼器での燃焼を一旦停止し第２熱交換器の温度を下げた後、温水放熱器を使い始めるようにしている。
【０００８】
このため、第２熱交換器を使用するに当たって、第１熱交換器での暖房も中断しなければならないと言う不具合がある。
【０００９】
本発明はかかる不具合を解消した温水熱交換器付き暖房装置を提供することを課題とする。
【００１０】
【課題を解決するための手段】
本願の請求項１に記載の発明は、周囲から輻射熱を放出する燃焼室の上部に、燃焼室から排出される排気を通過させて該排気が保有する排気熱を周囲の空気と熱交換させる第１熱交換器と、温水放熱器との間を循環する熱媒液と前記排気を通過させて当該排気が保有する排気熱との間で熱交換させる第２熱交換器と、第１熱交換器から該第２熱交換器を介して前記排気を流がす第１通路と該第２熱交換器を介さず直接排気を流がす第２通路とを選択して排気トップに切替接続するダンパと、前記燃焼室と第２熱交換器との間に介在させた断熱壁とを備え、断熱壁の背面側に設けられた第１通路及び第２通路により、第２熱交換器は第１熱交換器と距離を存した下方位置に設けられており、ダンパを、ダンパボックスとダンパボックス内の一の駆動軸に設けた２枚のダンパ羽根とで構成し、ダンパボックスは、その一側に第１通路と連なる開口を、他側に第２通路と連なる開口を備え、２枚のダンパ羽根の一の駆動軸をステッピングモータに連動させて、一方のダンパ羽根が第１通路と連なる開口を、他方のダンパ羽根が第２通路と連なる開口を、選択的に閉じる動作を行わせるようにしたことで、第２熱交換器は、これを流れる排気熱以外の熱によって加熱されることが殆どなく、これによって温水放熱器による暖房を行わないとき、第２熱交換器の温度が不必要に昇がることを防げる。
【００１１】
本願の請求項２に記載の発明は、請求項１の発明において、前記断熱壁を燃焼室の背面に設けた反射板で構成したことで、輻射熱を前方に反射する反射板を利用して第２熱交換器の温度が不必要に昇がることを防げる。
【００１２】
本願の請求項３に記載の発明は、請求項１または２記載の発明において、ダンパが外側面に圧力空気室を有して、圧力空気室に空気圧をかけることにより排気がダンパの駆動軸の隙間から洩れないようにしている。
【００１３】
本願の請求項４に記載の発明は、２枚のダンパ羽根を間隔保持具で接続し、間隔保持具の中間部をばね板からなる支持板を介して駆動軸に支持させたことで、該ステッピングモータでダンパを開口周面に当接したとき該支持板が撓んで確実にダンパ羽根を各開口周面に密着させることができる。
【００１４】
【発明の実施の形態】
本発明実施の形態を図１乃至図７に付き説明する。
１は暖房装置の筐体、２はポット式燃焼器その他の灯油を燃焼させる燃焼器、３はその上部に連なる燃焼室を示し、燃焼室３は耐熱ガラス筒等の熱線透過体で構成した。
なお、実施の形態では灯油を燃焼させる燃焼器２を示すが、該燃焼器は、都市ガスその他の燃料を燃焼させる燃焼器であっても良いこと申すまでもない。
【００１５】
４は該燃焼室３の上部に設けた燃焼室３から排出される排気を通過させて該排気が保有する排気熱を周囲の空気と熱交換させる第１熱交換器を示し、該第１熱交換器４は上下に偏平な中空体で構成した。
５は温水放熱器６との間に循環させる熱媒液を前記排気熱と熱交換させる第２熱交換器、７は燃焼室３の背面に設けた燃焼室３からの熱線を前方に反射する反射板を示し、前記第２熱交換器５は、この反射板７の背面で且つ第１熱交換器４から可及的に離れた筐体１の下部に設けた。
かくすることで、反射板７が断熱壁として機能するため、第２熱交換器５は燃焼室３からの熱線を殆ど受けず、しかも第１熱交換器４から離れるため第１熱交換器４の熱も殆ど受けない。
【００１６】
なお、該第２熱交換器５は、図５に示すごとく、第１熱交換器４を介して前記燃焼室３に連なる筒体５ａと、該筒体５ａ内に設けたフィン付き熱媒液の循環パイプ５ｂとからなり、該循環パイプ５ｂに設けたフィン５ｃは、排気の流れに対し交差する交差板の両端に互いに反対方向に折曲げた折曲片を備えて、排気の流れの抵抗をなるべく少なくすると共にフィン５ｃと排気との接触面積を大きく取り得る形状とした。
【００１７】
第１熱交換器４から排出される排気は、ダンパ１１の切り替えで、該第２熱交換器５を介して排気トップ８に連なる第１通路９と第２熱交換器５をバイパスして排気トップ８に連なる第２通路１０とを介して排気トップ８から屋外に排出されるようにした。
該ダンパ１１は、直角に交わる壁面に前記第１通路９の出口開口９ａと第２通路１０の出口開口１０ａとを開口させたダンパボックス１２と該ダンパボックス１２内に設けたダンパ羽根１３からなる。
これを説明すると、ダンパボックス１２の直角に交わる壁面に第１通路９の出口開口９ａと第２通路１０の出口開口１０ａとを開口させ、該出口開口９ａと出口開口１０ａとを、該ダンパボックス１２に設けたダンパ羽根１３で選択的に開閉することで、排気が第２熱交換器５を流れて熱交換する状態と、排気が第２熱交換器５を流れず熱交換しない状態を選択できるようにした。
なお、ダンパ羽根１３は、ダンパボックス１２のコーナ部１２ａに設けた駆動軸１４ａに軸支して設け、該駆動軸１４ａを、きわめて細かな歩進、例えばワンパルスで０．５度歩進するようなステッピングモータ１５に連動させて出口開口９ａと出口開口１０ａとを選択的に開閉する。
【００１８】
次ぎにダンパ羽根１３の動作を説明すると、ダンパ羽根１３で一方の出口開口９ａを塞ぐ状態から他方の出口開口１０ａを塞ぐ状態に切替えるとき、該ステッピングモータ１５の歩進距離を出口開口９ａと出口開口１０ａとがなす角度、図示のものでは９０度より大く歩進させた後、該ステッピングモータ１５への通電を解くことで、ダンパ羽根１３を出口開口１０ａの周面に圧接させるようにした。
【００１９】
このとき、ステッピングモータ１５は出口開口１０ａの周面に圧接した後も多少歩進するが、このとき一般のモータのように脱調に伴う不具合を発生することはない。しかもステッピングモータ１５は保持トルクを備えるため圧接後はその状態を保持できる。したがって、一般のモータのようにダンパ羽根１３を所定位置に停止させるための特別の制御回路等を必要としない利点がある。
【００２０】
なお、図に示す実施の態様では、図４、図６、図７から明らかなように、ダンパ羽根１３は、前記第１通路の出口９ａを閉じるダンパ羽根１３ａと、第２通路の出口１０ａを閉じるダンパ羽根１３ｂの２枚で構成し、各ダンパ羽根１３ａ、１３ｂは、その周囲をそれぞれ出口開口９ａ、１０ａ側に縁曲加工して補強した。更に両ダンパ羽根１３ａ、１３ｂを間隔保持具１４ｂで接続し、該間隔保持具１４ｂの中間部と駆動軸１４ａとをばね板からなる支持板１４で接続した。
これによって、ダンパ羽根１３を出口開口９ａ又は１０ａに密接させるための耐熱性のパッキンを省略でき、耐熱性のパッキンを用いることによる不具合、即ち、耐熱性のパッキンの劣化によりパッキンが剥れ落ちること等による不具合を解消できる。
【００２１】
なお、平板状のばね板からなる支持板１４を使用する場合該駆動軸１４ａは、両出口開口９ａ、１０ａにダンパ羽根１３ａ，１３ｂが当った状態にあるときの交点より、ダンパボックス１２の内側に僅かに片寄った位置に設けることで、ダンパ羽根１３の全面をより確実に出口開口９ａ又は１０ａに密接させることができる。
また、出口開口９ａ、１０ａにダンパ羽根１３ａ，ダンパ羽根１３ｂが当接する面が直角より多少ズレていても、支持板１４が撓んで確実に開口周面にダンパ羽根１３を密着させることができる。
なお、ダンパボックス１２を駆動軸１４ａが貫通する部分には隙間が生じ、該隙間から排気が室内に漏れ出る恐れがある。そこで、図６に示すごとく、該駆動軸１４ａが貫通するダンパボックス１２の外側面に圧力空気室１６を設け、該圧力空気室１６に燃焼用送風機１７からの空気圧をかけ、該空気圧によって排気洩れを防ぐようにした。
なお、１８は、前記温水放熱器６の熱媒循環路に介入させた水タンク、１９は循環ポンプ、２０は筐体１の背面に設けた第１熱交換器４に向けて送風する対流用送風機、２１は温風吹き出し口を示す。
【００２２】
なお、上述するものは、燃焼室３の周面を耐熱ガラス等の熱線透過体で構成し、該燃焼室３の背面に反射板７を臨ませた形式の暖房装置を示し、該反射板７を、燃焼室３からの熱線が第２熱交換器５に可及的に及ばないように働く断熱壁として機能させるようにしたが、これは反射板７に限ることなく、燃焼室３の周面と第２熱交換器５との間に介在する耐熱性の断熱壁であっても良いこと申すまでもない。
【００２３】
【発明の効果】
請求項１に記載の発明によるときは、第２熱交換器は、該これを流れる排気以外によって加温されることが殆どなく、これによって温水放熱器による暖房を行わないとき、第２熱交換器の温度が不必要に昇がらず、従来例のような不具合を解消できる。
【００２４】
請求項２に記載の発明によるときは、請求項１に記載の効果を、輻射熱を前方に反射する反射板を利用して達成でき、特別に断熱壁を設ける必要が無く安価に得られる。
【００２６】
請求項４に記載の発明によるときは、ステッピングモータでダンパ羽根を開口周面に当接させるとき、支持板が撓んで確実に開口周面にダンパ羽根を密着させることができ、第２熱交換器での熱交換を必要としないとき第２熱交換器に排気が流れ込むことを確実に防ぐことができて、第２熱交換器の温度上昇をより確実に防げる。
【図面の簡単な説明】
【図１】本発明実施の形態の一例を示す燃焼器部分で縦断した正面図
【図２】図１の截断側面図
【図３】第１熱交換器より上の部分で横断した平面図
【図４】図３のIV-IV 線截断面図
【図５】第２熱交換器の拡大截断平面図
【図６】ダンパ部の拡大截断側面図
【図７】ダンパの側面図
【符号の説明】
２燃焼器３燃焼室４第１熱交換器
５第２熱交換器６温水放熱器７反射板
９第１通路１０第２通路１１ダンパ
１２ダンパボックス１３ダンパ羽根１４支持板[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a heating device with a hot water heat exchanger that is provided with a hot water heater in addition to the heater and uses a common heat source.
[0002]
[Prior art]
A heating device that guides exhaust from the combustion chamber of the combustor into the first heat exchanger, and exchanges heat released from the surroundings of the first heat exchanger with the air around the first heat exchanger. Then, a heating device with a hot water heat exchanger in which a second exchanger that circulates a heat transfer fluid between the first heat exchanger of the heating device and a hot water radiator is known ( JP-A-9-196390).
[0003]
In addition, a heat exchanger that circulates the heat transfer fluid between the hot water radiator and the heat exchanger is provided in the exhaust passage, a damper that varies the amount of exhaust gas flowing to the heat exchanger is provided, and the damper is opened and closed by a motor. Some are also known (Japanese Utility Model Publication No. 62-88210).
[0004]
[Problems to be solved by the invention]
However, in these publications, the first heat exchanger is always heated by receiving radiant heat and conduction heat from the combustion chamber and the first heat exchanger while combustion is performed in the combustion chamber. For this reason, when the hot water radiator is not used, there is a problem that the heat transfer fluid boils in the second heat exchanger.
[0005]
Therefore, in the above heating device, an auxiliary radiator is provided in the circulation path of the heat transfer fluid connecting the hot water radiator and the second heat exchanger, and when the second heat exchanger is not used, heat is radiated from the auxiliary radiator. In the first heat exchanger, a passage through which the exhaust flows through the second heat exchanger and a passage through which the exhaust flows by bypassing the second heat exchanger are provided, and a damper is used when the hot water radiator is not used. A passage that bypasses the second heat exchanger is selected to suppress boiling of the heat transfer fluid in the second heat exchanger.
[0006]
However, when only the heating in the combustion chamber and the first heat exchanger is performed, if the hot water radiator starts to be used, the second heat exchanger cannot completely prevent hot air from the combustor and is in a high temperature state. Therefore, a low-temperature heat transfer fluid flows from the hot water radiator into the second heat exchanger, produces a boiling sound in the second heat exchanger, and further, due to the rapid expansion of the heat transfer fluid volume. There is a problem that an excessive force is applied to the second heat exchanger side, which causes damage on the second heat exchanger side.
[0007]
Therefore, when using only the heating by the first heat exchanger and starting to use the hot water radiator, the combustion in the combustor is temporarily stopped and the temperature of the second heat exchanger is lowered, and then the hot water radiator is released. I'm starting to use the vessel.
[0008]
For this reason, when using a 2nd heat exchanger, there exists a malfunction said that the heating in a 1st heat exchanger must also be interrupted.
[0009]
This invention makes it a subject to provide the heating apparatus with a hot water heat exchanger which eliminated this malfunction.
[0010]
[Means for Solving the Problems]
According to the first aspect of the present invention, the exhaust gas discharged from the combustion chamber is passed through the upper portion of the combustion chamber that emits radiant heat from the surroundings, and the exhaust heat held by the exhaust gas is exchanged with the surrounding air. A second heat exchanger that exchanges heat between the heat transfer medium circulating between the heat exchanger and the hot water radiator and the exhaust heat that is passed through the exhaust and the first heat exchange; A first passage through which the exhaust flows through the second heat exchanger and a second passage through which the exhaust flows directly without passing through the second heat exchanger are selected and connected to the exhaust top. The second heat exchanger includes a damper and a heat insulating wall interposed between the combustion chamber and the second heat exchanger. The first heat passage and the second passage provided on the back side of the heat insulating wall allow the second heat exchanger to It is provided to exist the lower position of the first heat exchanger and the distance, damper, one in the damper box and the damper box The damper box is composed of two damper blades provided on the moving shaft, and the damper box has an opening connected to the first passage on one side and an opening connected to the second passage on the other side. The drive shaft is linked to the stepping motor to selectively close the opening where one damper blade is connected to the first passage and the opening where the other damper blade is connected to the second passage. , the second heat exchanger, which it is hardly heated by the heat of the non-exhaust heat flowing, when this does not perform heating by hot water radiator, the temperature of the second heat exchanger rises unnecessarily Can be prevented.
[0011]
The invention according to claim 2 of the present application is the invention according to claim 1, wherein the heat insulating wall is configured by a reflecting plate provided on the back surface of the combustion chamber, so that a reflecting plate that reflects radiant heat forward is used. (2) The temperature of the heat exchanger can be prevented from rising unnecessarily.
[0012]
The invention according to claim 3 of the present application is the invention according to claim 1 or 2, wherein the damper has a pressure air chamber on the outer surface, and the exhaust air is applied to the pressure shaft by applying air pressure to the pressure air chamber. I try not to leak from the gap.
[0013]
In the invention according to claim 4 of the present application, two damper blades are connected by a spacing holder, and an intermediate portion of the spacing holder is supported on the drive shaft via a support plate made of a spring plate. When the damper is brought into contact with the peripheral surface of the opening by the stepping motor, the support plate is bent, and the damper blade can be securely brought into close contact with the peripheral surface of the opening.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS.
1 is a casing of a heating device, 2 is a pot-type combustor or other combustor for burning kerosene, 3 is a combustion chamber connected to the upper portion thereof, and the combustion chamber 3 is constituted by a heat ray transmitting body such as a heat-resistant glass cylinder.
In addition, although the combustor 2 which burns kerosene is shown in embodiment, it cannot be overemphasized that this combustor may be a combustor which burns city gas and other fuels.
[0015]
Reference numeral 4 denotes a first heat exchanger that allows the exhaust discharged from the combustion chamber 3 provided in the upper part of the combustion chamber 3 to pass through and exchanges the heat of the exhaust gas held by the exhaust with the surrounding air. The exchanger 4 is composed of a hollow body that is flat vertically.
5 the second heat exchanger to the exhaust heat and the heat exchange heat transfer fluid to circulate between the hot water radiator 6, 7 reflects heat rays from the combustion chamber 3 provided on the back of the combustion chamber 3 in front The reflection plate is shown, and the second heat exchanger 5 is provided on the back surface of the reflection plate 7 and in the lower part of the casing 1 as far as possible from the first heat exchanger 4.
Thus, since the reflector 7 functions as a heat insulation wall, the second heat exchanger 5 receives almost no heat rays from the combustion chamber 3 and is separated from the first heat exchanger 4, and thus the first heat exchanger 4. I hardly receive the heat.
[0016]
As shown in FIG. 5, the second heat exchanger 5 includes a cylindrical body 5a connected to the combustion chamber 3 via the first heat exchanger 4, and a finned heat transfer fluid provided in the cylindrical body 5a. The circulation pipe 5b is provided with fins 5c provided on the circulation pipe 5b. The fins 5c are provided with bent pieces bent in opposite directions at both ends of the crossing plate intersecting the exhaust flow. The shape is such that the contact area between the fin 5c and the exhaust can be increased.
[0017]
Exhaust gas discharged from the first heat exchanger 4 is exhausted by bypassing the first passage 9 and the second heat exchanger 5 connected to the exhaust top 8 via the second heat exchanger 5 by switching the damper 11. It was made to discharge | emit to the outdoors from the exhaust top 8 via the 2nd channel | path 10 continuing to the top 8. FIG.
The damper 11 includes a damper box 12 in which an outlet opening 9a of the first passage 9 and an outlet opening 10a of the second passage 10 are opened on walls intersecting at right angles, and damper blades 13 provided in the damper box 12. .
Explaining this, the outlet opening 9a of the first passage 9 and the outlet opening 10a of the second passage 10 are opened on the wall surface of the damper box 12 that intersects at right angles, and the outlet opening 9a and the outlet opening 10a are connected to the damper box. By selectively opening and closing with the damper blades 13 provided in 12, the state where the exhaust flows through the second heat exchanger 5 and heat exchange is selected, and the state where the exhaust does not flow through the second heat exchanger 5 and does not exchange heat I was able to do it.
The damper blade 13 is provided so as to be supported by a drive shaft 14a provided at the corner portion 12a of the damper box 12, and the drive shaft 14a is advanced by 0.5 degrees with a very fine step, for example, one pulse. The outlet opening 9a and the outlet opening 10a are selectively opened and closed in conjunction with a stepping motor 15.
[0018]
Next, the operation of the damper blade 13 will be described. When the damper blade 13 is switched from the state in which the one outlet opening 9a is closed to the state in which the other outlet opening 10a is closed, the stepping distance of the stepping motor 15 is set to the outlet opening 9a and the outlet. After making the angle formed by the opening 10a larger than 90 degrees in the illustrated case, the stepping motor 15 is de-energized so that the damper blade 13 is pressed against the peripheral surface of the outlet opening 10a. .
[0019]
At this time, the stepping motor 15 advances slightly after being brought into pressure contact with the peripheral surface of the outlet opening 10a, but at this time, there is no problem with the step-out unlike a general motor. Moreover, since the stepping motor 15 has a holding torque, the stepping motor 15 can hold the state after the press contact. Therefore, there is an advantage that a special control circuit or the like for stopping the damper blade 13 at a predetermined position is not required unlike a general motor.
[0020]
In the embodiment shown in the figure, as is apparent from FIGS. 4, 6, and 7, the damper blade 13 includes a damper blade 13a that closes the outlet 9a of the first passage and an outlet 10a of the second passage. Each of the damper blades 13a and 13b was reinforced by edge bending to the side of the outlet openings 9a and 10a. Further, both damper blades 13a and 13b are connected by a spacing holder 14b, and an intermediate portion of the spacing holder 14b and the drive shaft 14a are connected by a support plate 14 made of a spring plate.
As a result, the heat-resistant packing for bringing the damper blade 13 into close contact with the outlet opening 9a or 10a can be omitted, and the problem of using the heat-resistant packing, that is, the packing peels off due to deterioration of the heat-resistant packing. The trouble by etc. can be eliminated.
[0021]
When the support plate 14 made of a flat spring plate is used, the drive shaft 14a is located inside the damper box 12 from the intersection when the damper blades 13a and 13b are in contact with the outlet openings 9a and 10a. By providing at a slightly offset position, the entire surface of the damper blade 13 can be brought into close contact with the outlet opening 9a or 10a more reliably.
In addition, even if the surfaces of the damper blades 13a and 13b that are in contact with the outlet openings 9a and 10a are slightly shifted from the right angle, the support plate 14 is bent and the damper blades 13 can be securely adhered to the peripheral surface of the opening.
Note that a gap is formed in a portion where the drive shaft 14a passes through the damper box 12, and the exhaust gas may leak into the room from the gap. Therefore, as shown in FIG. 6, a pressure air chamber 16 is provided on the outer surface of the damper box 12 through which the drive shaft 14a penetrates, and air pressure from the combustion blower 17 is applied to the pressure air chamber 16, and exhaust leakage is caused by the air pressure. To prevent.
Reference numeral 18 denotes a water tank intervened in the heat medium circulation path of the hot water radiator 6, 19 a circulation pump, and 20 a convection for blowing air toward the first heat exchanger 4 provided on the back surface of the housing 1. A blower 21 indicates a hot air outlet.
[0022]
In addition, what was mentioned above shows the heating apparatus of the type which comprised the surrounding surface of the combustion chamber 3 with heat ray transmitting bodies, such as heat-resistant glass, and faced the reflecting plate 7 in the back surface of this combustion chamber 3, This reflecting plate 7 Is made to function as a heat insulating wall that works so as to prevent the heat rays from the combustion chamber 3 from reaching the second heat exchanger 5 as much as possible. Needless to say, it may be a heat-resistant insulating wall interposed between the surface and the second heat exchanger 5.
[0023]
【The invention's effect】
According to the first aspect of the present invention, the second heat exchanger is hardly heated except by the exhaust gas flowing through the second heat exchanger, so that the second heat exchanger is not heated by the hot water radiator. The temperature of the vessel does not rise unnecessarily, and the problems as in the conventional example can be solved.
[0024]
According to the invention described in claim 2, the effect described in claim 1 can be achieved by using a reflecting plate that reflects radiant heat forward, and it is not necessary to provide a special heat insulating wall and can be obtained at low cost.
[0026]
When the damper blade is brought into contact with the opening peripheral surface by the stepping motor, the support plate bends and the damper blade can be securely brought into close contact with the opening peripheral surface. When the heat exchange in the heat exchanger is not required, it is possible to reliably prevent the exhaust gas from flowing into the second heat exchanger, and it is possible to more reliably prevent the temperature rise of the second heat exchanger.
[Brief description of the drawings]
FIG. 1 is a front view of a longitudinal section of a combustor portion showing an example of an embodiment of the present invention. FIG. 2 is a cutaway side view of FIG. 1. FIG. 3 is a plan view crossed by a portion above a first heat exchanger. Fig. 4 IV-IV cross-sectional view of Fig. 3 [Fig. 5] Expanded cut plan view of the second heat exchanger [Fig. 6] Expanded cut side view of the damper part [Fig. ]
DESCRIPTION OF SYMBOLS 2 Combustor 3 Combustion chamber 4 1st heat exchanger 5 2nd heat exchanger 6 Hot water radiator 7 Reflector 9 First passage 10 Second passage 11 Damper 12 Damper box 13 Damper blade 14 Support plate

Claims

周囲から輻射熱を放出する燃焼室の上部に、燃焼室から排出される排気を通過させて該排気が保有する排気熱を周囲の空気と熱交換させる第１熱交換器と、温水放熱器との間を循環する熱媒液と前記排気を通過させて当該排気が保有する排気熱との間で熱交換させる第２熱交換器と、第１熱交換器から該第２熱交換器を介して前記排気を流がす第１通路と該第２熱交換器を介さず直接排気を流がす第２通路とを選択して排気トップに切替接続するダンパと、前記燃焼室と第２熱交換器との間に介在させた断熱壁とを備え、
前記断熱壁の背面側に設けられた前記第１通路及び前記第２通路により、第２熱交換器は第１熱交換器と距離を存した下方位置に設けられており、
前記ダンパを、ダンパボックスと該ダンパボックス内の一の駆動軸に設けた２枚のダンパ羽根とで構成し、ダンパボックスは、その一側に第１通路と連なる開口を、他側に第２通路と連なる開口を備え、前記２枚のダンパ羽根の一の駆動軸をステッピングモータに連動させて、一方のダンパ羽根が第１通路と連なる開口を、他方のダンパ羽根が第２通路と連なる開口を、選択的に閉じる動作を行わせるようにしたことを特徴とする温水熱交換器付き暖房装置。A first heat exchanger that allows the exhaust discharged from the combustion chamber to pass through the upper part of the combustion chamber that emits radiant heat from the surroundings, and exchanges heat with the surrounding air, and a hot water radiator A second heat exchanger for exchanging heat between the heat transfer fluid circulating between the exhaust gas and the exhaust heat held by the exhaust, and the first heat exchanger through the second heat exchanger A damper for selecting and switching a first passage through which the exhaust flows and a second passage through which the exhaust flows directly without going through the second heat exchanger to the exhaust top; and a second heat exchange with the combustion chamber With a heat insulating wall interposed between
With the first passage and the second passage provided on the back side of the heat insulating wall, the second heat exchanger is provided at a lower position with a distance from the first heat exchanger ,
The damper is composed of a damper box and two damper blades provided on one drive shaft in the damper box. The damper box has an opening connected to the first passage on one side and a second on the other side. An opening connected to the passage is provided, and one of the two damper blades is linked to the stepping motor so that one damper blade is connected to the first passage, and the other damper blade is connected to the second passage. A heating device with a hot water heat exchanger characterized in that an operation of selectively closing is performed .

前記断熱壁を燃焼室の背面に設けた反射板で構成したことを特徴とする請求項１記載の温水熱交換器付き暖房装置。 The heating apparatus with a hot water heat exchanger according to claim 1, wherein the heat insulating wall is configured by a reflector provided on a back surface of the combustion chamber.

前記ダンパが外側面に圧力空気室を有して、当該圧力空気室に空気圧をかけることにより前記排気が当該ダンパの駆動軸の隙間から洩れないようにしていることを特徴とする請求項１または２記載の温水熱交換器付き暖房装置。 2. The damper according to claim 1, wherein the damper has a pressure air chamber on an outer surface, and the exhaust air is prevented from leaking through a gap of a drive shaft of the damper by applying air pressure to the pressure air chamber. The heating apparatus with a hot water heat exchanger according to 2.

前記２枚のダンパ羽根を間隔保持具で接続し、当該間隔保持具の中間部をばね板からなる支持板を介して駆動軸に支持させたことを特徴とする請求項１〜３のいずれかに記載の温水熱交換器付き暖房装置。 The two damper blades connected at intervals retainer claim 1-3 via a supporting plate made of an intermediate portion of the distance holder of a spring plate, characterized in that is supported by the drive shaft hot water heat exchanger with heating system according to.