JPH10131745A - Exhaust pipe structure for combustion heater - Google Patents
Exhaust pipe structure for combustion heaterInfo
- Publication number
- JPH10131745A JPH10131745A JP8284190A JP28419096A JPH10131745A JP H10131745 A JPH10131745 A JP H10131745A JP 8284190 A JP8284190 A JP 8284190A JP 28419096 A JP28419096 A JP 28419096A JP H10131745 A JPH10131745 A JP H10131745A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust pipe
- heater
- water
- pipe
- combustion
- 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.)
- Pending
Links
Landscapes
- Exhaust Silencers (AREA)
- Cooling, Air Intake And Gas Exhaust, And Fuel Tank Arrangements In Propulsion Units (AREA)
Abstract
Description
【０００１】[0001]
【発明の属する技術分野】本発明は、灯油等の燃料を燃
焼させて車両を暖房する燃焼式ヒータの排気管構造に関
する。The present invention relates to an exhaust pipe structure of a combustion type heater for heating a vehicle by burning fuel such as kerosene.
【０００２】[0002]
【従来の技術】エンジンを動力源として走行する自動車
は、エンジンを冷却して温度上昇した冷却水を熱源とす
るヒータで車室の暖房を行っている。しかしながら、電
気モータを動力源とするいわゆる電気自動車では、電気
モータの発生する熱がエンジンのそれと比べて小さいた
め、灯油等の燃料を燃焼させる燃焼式ヒータにより車室
の暖房を行っている。また北欧等の寒冷地向き仕様の自
動車には、エンジンの運転停止時にも暖房が行えるよう
に燃焼式ヒータを搭載したものがある。2. Description of the Related Art In an automobile that runs using an engine as a power source, the interior of the vehicle is heated by a heater that uses a cooling water whose temperature is raised by cooling the engine as a heat source. However, in a so-called electric vehicle that uses an electric motor as a power source, the heat generated by the electric motor is smaller than that of the engine, so that the cabin is heated by a combustion heater that burns fuel such as kerosene. Some automobiles designed for cold regions such as in Northern Europe are equipped with a combustion heater so that heating can be performed even when the operation of the engine is stopped.
【０００３】上記従来のエンジン搭載車両の燃焼式ヒー
タの排気管は、エンジンルームに搭載したヒータ本体か
ら略鉛直下方に延び、その下端はエンジンルーム内に開
口している。[0003] The exhaust pipe of the combustion type heater of the above-mentioned conventional engine-equipped vehicle extends substantially vertically downward from a heater body mounted in an engine room, and its lower end is opened into the engine room.
【０００４】[0004]
【発明が解決しようとする課題】ところで、エンジン搭
載車両の燃焼式ヒータを電気自動車に搭載した場合、車
両の走行中に燃焼式ヒータから排出される白煙がドライ
バーの視野に入って視認性を低下させたり故障と誤認さ
れたりする可能性があるばかりか、排気ガスのスメルが
車室内に侵入して快適性を損なう可能性がある。When an electric vehicle is equipped with a combustion-type heater of a vehicle equipped with an engine, white smoke discharged from the combustion-type heater while the vehicle is running enters the driver's field of view to improve visibility. Not only may it be reduced or misidentified as a malfunction, but also the smell of the exhaust gas may enter the passenger compartment and impair comfort.
【０００５】そこで、車体前部に搭載した燃焼式ヒータ
から排気管を車体後部まで延長し、排気ガスが車体後方
に排出されるようにすれば、上記各問題点が解消され
る。しかしながら、車体前部から車体後部まで延びる排
気管を設けると、排気ガス中に含まれる水蒸気が凝縮し
た水が排気管の底部に溜まり、燃焼式ヒータの運転を停
止した後に気温が低下すると前記水が凍結してしまい、
排気管の通路断面積が減少する問題がある。The above problems can be solved by extending the exhaust pipe from the combustion heater mounted on the front part of the vehicle body to the rear part of the vehicle body so that exhaust gas is discharged to the rear part of the vehicle body. However, if an exhaust pipe extending from the front of the vehicle to the rear of the vehicle is provided, water condensed with water vapor contained in the exhaust gas accumulates at the bottom of the exhaust pipe. Has frozen,
There is a problem that the cross-sectional area of the passage of the exhaust pipe is reduced.
【０００６】本発明は前述の事情に鑑みてなされたもの
で、燃焼式ヒータの排気管が水の凍結により閉塞される
のを防止することを目的とする。The present invention has been made in view of the above circumstances, and has as its object to prevent an exhaust pipe of a combustion heater from being blocked by freezing of water.
【０００７】[0007]
【課題を解決するための手段】請求項１に記載された発
明では、燃焼式ヒータから排出された排気ガスは排気管
内で温度低下し、含まれた水蒸気が凝縮して水が生成す
る。燃焼式ヒータの排気ガスの圧力は比較的に低いた
め、排気管の外部に排出されなかった水の一部が排気管
の最下点に滞留して気温の低下に伴って凍結する。しか
しながら、前記最下点は排気管の前部に位置して燃焼式
ヒータの運転時に効果的に加熱されるため、排気管の最
下点において凍結した氷は速やかに融けて排気管を閉塞
することがない。According to the first aspect of the present invention, the temperature of the exhaust gas discharged from the combustion heater drops in the exhaust pipe, and the contained steam condenses to produce water. Since the pressure of the exhaust gas from the combustion heater is relatively low, a part of the water that has not been discharged to the outside of the exhaust pipe stays at the lowest point of the exhaust pipe and freezes as the temperature decreases. However, since the lowest point is located at the front of the exhaust pipe and is effectively heated during operation of the combustion type heater, ice frozen at the lowest point of the exhaust pipe melts quickly and blocks the exhaust pipe. Nothing.
【０００８】請求項２に記載された発明では、排気ガス
に含まれた水蒸気が凝縮して生成した水が排気管の最下
点に設けた排水孔から排出されるため、排気管内に滞留
する水を減少させることができる。According to the second aspect of the present invention, water generated by condensing water vapor contained in the exhaust gas is discharged from the drain hole provided at the lowest point of the exhaust pipe, and stays in the exhaust pipe. Water can be reduced.
【０００９】請求項３に記載された発明では、排水孔カ
バーで排水孔を覆うことにより、泥水等が排水孔を詰ま
らせることが防止される。According to the third aspect of the present invention, the drain hole is covered with the drain hole cover, thereby preventing muddy water or the like from clogging the drain hole.
【００１０】[0010]
【発明の実施の形態】以下、本発明の実施の形態を、添
付図面に示した本発明の実施例に基づいて説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described based on embodiments of the present invention shown in the accompanying drawings.
【００１１】図１〜図５は本発明の一実施例を示すもの
で、図１は電気自動車の全体側面図、図２は図１の２部
拡大図、図３は図２の要部拡大断面図、図４は図３の４
−４線断面図、図５は図１の５部拡大図である。1 to 5 show one embodiment of the present invention. FIG. 1 is an overall side view of an electric vehicle, FIG. 2 is an enlarged view of a part of FIG. 1, and FIG. 3 is an enlarged view of a main part of FIG. FIG. 4 is a sectional view of FIG.
FIG. 5 is an enlarged view of a part of FIG.
【００１２】図１に示すように、電気自動車Ｖの車体前
部に走行用の電気モータ１を収納する電気モータ室２が
設けられており、この電気モータ室２に燃焼式ヒータ３
が配置される。燃焼式ヒータ３は、灯油を燃焼させて加
熱した温水を熱交換機を通して循環させ、熱交換機を通
過する温水で加熱した空気を車室に供給して暖房を行う
ようになっている。燃焼式ヒータ３のヒータ本体４から
下方に延びる排気マニホールド５に、前部排気管６、中
央排気管７及び後部排気管８に３分割された排気管９が
接続される。中央排気管７は車体の下部に設けたバッテ
リボックス１０の左側面に沿って車体前後方向に延び、
その後端に接続された後部排気管８はリヤアクスル１１
の上部を迂回するように屈曲し、その後端はリヤバンパ
ー１２の下部に開口している。排気管９の高さが最も低
くなる最下点は、排気管９の前後方向中間部よりも燃焼
ヒータ３に近い位置である中央排気管７の前端部近傍に
設定されている。As shown in FIG. 1, an electric motor room 2 for housing an electric motor 1 for traveling is provided at a front portion of a body of an electric vehicle V, and a combustion type heater 3 is provided in the electric motor room 2.
Is arranged. The combustion heater 3 circulates hot water heated by burning kerosene through a heat exchanger, and supplies air heated by the hot water passing through the heat exchanger to a vehicle compartment to perform heating. An exhaust manifold 5 extending downward from a heater body 4 of the combustion type heater 3 is connected to an exhaust pipe 9 divided into a front exhaust pipe 6, a central exhaust pipe 7, and a rear exhaust pipe 8. The central exhaust pipe 7 extends in the vehicle front-rear direction along the left side surface of the battery box 10 provided at the lower part of the vehicle body,
The rear exhaust pipe 8 connected to the rear end is a rear axle 11
Is bent so as to bypass the upper part of the rear bumper 12, and its rear end is opened to the lower part of the rear bumper 12. The lowest point where the height of the exhaust pipe 9 is the lowest is set near the front end of the central exhaust pipe 7 which is closer to the combustion heater 3 than the middle part in the front-rear direction of the exhaust pipe 9.
【００１３】図２〜図４を併せて参照すると明らかなよ
うに、中央排気管７の略中央部に溶接したフック１３
が、車体に溶接したフック１４にラバー製の吊り下げ部
材１５を介して係止される。中央排気管７の最下点の下
壁には小径（例えば、直径３ｍｍ）の前部排水孔７1 が
形成される。前部排水孔７1 の下方及び前方を覆うよう
に、中央排気管７の下面に排水孔カバー１６が溶接され
る。Referring to FIGS. 2 to 4 together, it is apparent that a hook 13 welded to a substantially central portion of the central exhaust pipe 7 is provided.
Is hooked to a hook 14 welded to the vehicle body via a suspension member 15 made of rubber. The lower wall of the lowest point of the central exhaust pipe 7 small (e.g., diameter 3mm) front drain hole 71 is formed. So as to cover the lower and front of the front drain hole 71, drain hole cover 16 on the lower surface of the central exhaust pipe 7 is welded.
【００１４】図１及び図５から明らかなように、後部排
気管８の上方屈曲部８2 の後側に溶接したフック１７
が、車体に溶接したフック１８にラバー製の吊り下げ部
材１９を介して係止される。前記上方屈曲部８2 の前方
の下壁には前記第１排水孔７1と同径の後部排水孔８1
が形成される。後部排水孔８1 の下方及び前方を覆うよ
うに、後部排気管８の下面に排水孔カバー２０が溶接さ
れる。[0014] Figure 1 and is apparent from FIG. 5, the hook is welded to the rear side of the upper bent portion 82 of the rear exhaust pipe 8 17
Is hooked to a hook 18 welded to the vehicle body via a hanging member 19 made of rubber. Rear part of the same diameter as 1 the first drain hole 7 in the lower wall of the front of the upper bent portion 82 drain holes 8 1
Is formed. So as to cover the lower and front of the rear drain hole 81, drain hole cover 20 is welded to the lower surface of the rear exhaust pipe 8.
【００１５】次に、前述の構成を備えた本発明の実施例
の作用を説明する。Next, the operation of the embodiment of the present invention having the above configuration will be described.
【００１６】車室を暖房すべく燃焼式ヒータ３を運転す
ると、その排気ガスは車体後部まで延びる排気管９の後
端から排出されるので、排気ガスの白煙やスメルがドラ
イバーの運転操作や快適性に影響を及ぼすことがないだ
けでなく、電気自動車Ｖの停止時に排気ガスの白煙が発
生しても、それが車体前部から発生するものでないため
に故障と誤認されることがない。また排気管９の全長が
長くなるため、排気吐出音が低減して排気サイレンサー
を廃止することができる。When the combustion type heater 3 is operated to heat the passenger compartment, the exhaust gas is exhausted from the rear end of the exhaust pipe 9 extending to the rear part of the vehicle body. Not only does it not affect comfort, but even if white smoke of exhaust gas is generated when the electric vehicle V is stopped, it is not mistaken as a failure because it does not originate from the front of the vehicle body. . Further, since the entire length of the exhaust pipe 9 is increased, the exhaust discharge noise is reduced, and the exhaust silencer can be eliminated.
【００１７】さて、燃焼式ヒータ３の運転により排気ガ
スが発生すると、排気ガス中に含まれる水蒸気が凝縮し
て排気管９内に水が生成する。燃焼ヒータ３の排気ガス
の圧力は低く、しかも排気管９の後部には上向きの屈曲
部８2 が存在するため、排気管９内の水は重力で最下点
に集まり、前部排水孔７1 から排出される。燃焼ヒータ
３の運転停止後に排気管９の温度が低下し、更に気温が
氷点下になると、排出されずに前部排水孔７1 の近傍に
滞留した水が凍結する場合がある。しかしながら、排気
管９の最下点が燃焼ヒータ３に近い位置に配置されてい
ることから、次に燃焼ヒータ３の運転を再開したときに
高温の排気ガスを排気管９の凍結部に効果的に作用さ
せ、凍結部の氷を速やかに融かして排気管９の閉塞を防
止することができる。また、電気自動車Ｖの走行時に泥
水等が排気管９に掛かったとき、その泥水等を排水孔カ
バー１６，２０で遮ることにより、前部排水孔７1 及び
後部排水孔８1 の詰まりを防止することができる。When exhaust gas is generated by the operation of the combustion heater 3, water vapor contained in the exhaust gas is condensed and water is generated in the exhaust pipe 9. The pressure of the exhaust gas in the combustion heater 3 is low, and since the rear portion of the exhaust pipe 9 there are upward bent portion 82, the water in the exhaust pipe 9 collects at the lowest point by gravity, the front drainage hole 7 Emitted from one . Temperature of the exhaust pipe 9 is lowered after stop of the operation of the combustion heater 3, further temperature drops below freezing, the water staying in the vicinity of the front drain hole 71 without being discharged in some cases frozen. However, since the lowest point of the exhaust pipe 9 is located near the combustion heater 3, high-temperature exhaust gas is effectively supplied to the freezing portion of the exhaust pipe 9 when the operation of the combustion heater 3 is restarted next time. To quickly melt the ice in the freezing portion to prevent the exhaust pipe 9 from being blocked. Further, when the muddy water or the like during traveling of the electric vehicle V is applied to the exhaust pipe 9, by interrupting the dirty water in the drain hole cover 16 and 20, the clogging of the front drain hole 71 and the rear drain hole 81 to prevent can do.
【００１８】また、電気自動車Ｖが前上がりに傾斜して
停車したとき、排気管９内の水は屈曲部８2 の直前の後
部排水孔８1 の部分に集まり、この後部排水孔８1 から
排出されるため、凍結による排気管９の閉塞が防止され
る。Further, when the electric vehicle V is stopped inclined forwardly upward, the water in the exhaust pipe 9 collects in the rear drain hole 81 of the part immediately before the bent portion 82, from the rear drain hole 8 1 Since the gas is discharged, blockage of the exhaust pipe 9 due to freezing is prevented.
【００１９】以上、本発明の実施例を詳述したが、本発
明は前記実施例に限定されるものでなく、種々の設計変
更を行うことが可能である。Although the embodiments of the present invention have been described in detail, the present invention is not limited to the above-described embodiments, and various design changes can be made.
【００２０】例えば、実施例では電気自動車Ｖの燃焼式
ヒータ３を例示したが、本発明はエンジンを動力源とす
る自動車の燃焼式ヒータに対しても適用することができ
る。また請求項１に記載された発明では、前部排水孔７
1 及び後部排出孔８1 は必ずしも必要ではなく、省略す
ることも可能である。更に請求項２に記載された発明で
は、後部排水孔８1 は必ずしも必要ではなく、省略する
ことも可能である。For example, in the embodiment, the combustion type heater 3 of the electric vehicle V is illustrated. However, the present invention can be applied to a combustion type heater of an automobile using an engine as a power source. According to the first aspect of the present invention, the front drain hole 7 is provided.
1 and the rear discharge hole 81 is not necessarily required, can be omitted. Further in the invention described in claim 2, the rear drain hole 81 is not necessarily required, it can be omitted.
【００２１】[0021]
【発明の効果】以上のように、請求項１に記載された発
明によれば、車体前部に搭載した燃焼式ヒータから出る
排気ガスを車体後部に排出する排気管を車体前後方向に
配置し、その排気管の最下点を該排気管の前後方向中央
よりも前方に位置させたので、排気管から出る白煙やス
メルがドライバーに与える影響を軽減することができ、
しかも排気管の最下点に水が滞留して凍結しても、その
氷を排気ガスの熱で速やかに融かして排気管の閉塞を回
避することができる。As described above, according to the first aspect of the present invention, the exhaust pipe for discharging the exhaust gas from the combustion type heater mounted on the front of the vehicle body to the rear of the vehicle body is disposed in the front-rear direction of the vehicle body. Since the lowermost point of the exhaust pipe is located forward of the center in the front-rear direction of the exhaust pipe, it is possible to reduce the influence of white smoke and smell from the exhaust pipe on the driver,
In addition, even if water stays at the lowest point of the exhaust pipe and freezes, the ice can be quickly melted by the heat of the exhaust gas to avoid blockage of the exhaust pipe.
【００２２】また、請求項２に記載された発明によれ
ば、排気管の最下点に排水孔を形成したので、排気管内
で凝縮した水を排水孔から排出し、排気管内に滞留する
水を減少させることができる。According to the second aspect of the present invention, since the drain hole is formed at the lowest point of the exhaust pipe, water condensed in the exhaust pipe is discharged from the drain hole, and water remaining in the exhaust pipe is retained. Can be reduced.
【００２３】また、請求項３に記載された発明によれ
ば、排水孔の外側を排水孔カバーで覆ったので、泥水等
によって排水孔が詰まることがない。According to the third aspect of the present invention, since the outside of the drain hole is covered with the drain hole cover, the drain hole is not clogged by muddy water or the like.
【図１】電気自動車の全体側面図FIG. 1 is an overall side view of an electric vehicle.
【図２】図１の２部拡大図FIG. 2 is an enlarged view of a part of FIG. 1;
【図３】図２の要部拡大断面図FIG. 3 is an enlarged sectional view of a main part of FIG. 2;
【図４】図３の４−４線断面図FIG. 4 is a sectional view taken along line 4-4 in FIG. 3;
【図５】図１の５部拡大図FIG. 5 is an enlarged view of part 5 of FIG.
３ 燃焼式ヒータ ７1 前部排水孔（排水孔） ９ 排気管 １６ 排水孔カバー3 Combustion heater 7 1 Front drain hole (drain hole) 9 Exhaust pipe 16 Drain hole cover
Claims (3)
から出る排気ガスを車体後部に排出する排気管（９）を
車体前後方向に配置し、その排気管（９）の最下点を該
排気管（９）の前後方向中央よりも前方に位置させたこ
とを特徴とする、燃焼式ヒータの排気管構造。A combustion heater mounted on a front part of a vehicle body (3).
An exhaust pipe (9) for discharging exhaust gas emitted from the rear of the vehicle body is arranged in the front-rear direction of the vehicle body, and the lowest point of the exhaust pipe (9) is located forward of the center in the front-rear direction of the exhaust pipe (9). An exhaust pipe structure for a combustion-type heater.
を形成したことを特徴とする、請求項１記載の燃焼式ヒ
ータの排気管構造。2. A drain hole (7 1 ) at the lowest point of the exhaust pipe (9).
The exhaust pipe structure of a combustion-type heater according to claim 1, wherein:
（１６）で覆ったことを特徴とする、請求項２記載の燃
焼式ヒータの排気管構造。3., characterized in that the outer drain holes (71) covered with drainage holes cover (16), an exhaust pipe structure of the combustion heater according to claim 2, wherein.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8284190A JPH10131745A (en) | 1996-10-25 | 1996-10-25 | Exhaust pipe structure for combustion heater |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP8284190A JPH10131745A (en) | 1996-10-25 | 1996-10-25 | Exhaust pipe structure for combustion heater |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH10131745A true JPH10131745A (en) | 1998-05-19 |
Family
ID=17675347
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP8284190A Pending JPH10131745A (en) | 1996-10-25 | 1996-10-25 | Exhaust pipe structure for combustion heater |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH10131745A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210352A (en) * | 2013-06-03 | 2014-12-17 | 赵莹莹 | Car water-contact anti-flameout exhaust pipe |
| JP2017101613A (en) * | 2015-12-02 | 2017-06-08 | トヨタ自動車株式会社 | Engine exhaust pipe |
-
1996
- 1996-10-25 JP JP8284190A patent/JPH10131745A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104210352A (en) * | 2013-06-03 | 2014-12-17 | 赵莹莹 | Car water-contact anti-flameout exhaust pipe |
| JP2017101613A (en) * | 2015-12-02 | 2017-06-08 | トヨタ自動車株式会社 | Engine exhaust pipe |
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