JPH02149753A - Exhaust heat recovering device for horizontal water-cooled engine - Google Patents
Exhaust heat recovering device for horizontal water-cooled engineInfo
- Publication number
- JPH02149753A JPH02149753A JP30459288A JP30459288A JPH02149753A JP H02149753 A JPH02149753 A JP H02149753A JP 30459288 A JP30459288 A JP 30459288A JP 30459288 A JP30459288 A JP 30459288A JP H02149753 A JPH02149753 A JP H02149753A
- Authority
- JP
- Japan
- Prior art keywords
- exhaust
- exhaust heat
- temperature
- exhaust gas
- engine
- 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
- 239000006096 absorbing agent Substances 0.000 claims abstract description 57
- 239000007788 liquid Substances 0.000 claims abstract description 52
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 14
- 238000011084 recovery Methods 0.000 claims description 32
- 238000002485 combustion reaction Methods 0.000 claims description 5
- 238000009835 boiling Methods 0.000 abstract description 8
- 239000000110 cooling liquid Substances 0.000 abstract description 3
- 239000008399 tap water Substances 0.000 abstract description 2
- 235000020679 tap water Nutrition 0.000 abstract description 2
- 238000010438 heat treatment Methods 0.000 abstract 3
- 239000007789 gas Substances 0.000 description 43
- 239000000498 cooling water Substances 0.000 description 10
- 239000002826 coolant Substances 0.000 description 6
- 239000012530 fluid Substances 0.000 description 4
- 238000010521 absorption reaction Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 239000002918 waste heat Substances 0.000 description 2
- 230000032683 aging Effects 0.000 description 1
- 238000005219 brazing Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000002828 fuel tank Substances 0.000 description 1
- 239000013529 heat transfer fluid Substances 0.000 description 1
- 229910052742 iron Inorganic materials 0.000 description 1
- 238000011176 pooling Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
- F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
- F28D21/0001—Recuperative heat exchangers
- F28D21/0003—Recuperative heat exchangers the heat being recuperated from exhaust gases
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2265/00—Safety or protection arrangements; Arrangements for preventing malfunction
- F28F2265/10—Safety or protection arrangements; Arrangements for preventing malfunction for preventing overheating, e.g. heat shields
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E20/00—Combustion technologies with mitigation potential
- Y02E20/14—Combined heat and power generation [CHP]
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Exhaust Gas After Treatment (AREA)
Abstract
Description
【発明の詳細な説明】
（産業上の利用分野）
本発明は、横型水冷エンジンに備えた排熱回収装置に関
する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to an exhaust heat recovery device provided in a horizontal water-cooled engine.
（従来技術）
従来、エンジンの排熱回収装置としては、例えば実開昭
６２−３９１６９号公報に示されるように、エンジンの
ウォータジャケットから出た比較的低温の冷却水を熱源
流体とする低温の排熱回収器と、エンジンの排気ガスを
熱源流体とする高温の排熱回収器を別々に設け、排熱回
収流体を各排熱回収器に分岐供給して熱回収したのち再
び合流させるように構成したものが知られている。(Prior art) Conventionally, engine exhaust heat recovery devices have been developed using low-temperature cooling water that uses relatively low-temperature cooling water discharged from the engine's water jacket as a heat source fluid, as shown in, for example, Japanese Utility Model Application Publication No. 62-39169. An exhaust heat recovery device and a high-temperature exhaust heat recovery device that uses engine exhaust gas as a heat source fluid are installed separately, and the exhaust heat recovery fluid is branched and supplied to each exhaust heat recovery device to recover the heat and then join again. The composition is known.
ところがこのものでは、低温側排熱回収器では温度差が
少なく、高温側排熱回収器ではｖト熱回収用流体の流量
が全量に比較して少ないことから、熱回収効率が低い。However, in this case, the temperature difference is small in the low-temperature side waste heat recovery device, and the flow rate of the heat recovery fluid in the high-temperature side waste heat recovery device is small compared to the total amount, so the heat recovery efficiency is low.
また、配管が複雑になるという問題点が残っていた。In addition, there remained the problem that the piping was complicated.
そこで本出願人は、本発明に先立ち、ウォータジャケッ
トから出て来たエンジン冷却水と排気ガスを排気熱吸収
器で熱交換させることにより、エンジン冷却水で排気ガ
スの保有熱エネルギーを吸収し、この排気ガス保有熱エ
ネルギーを吸収したエンジン冷却水を熱回収器に流入さ
せるようにした排熱回収装置（特願昭６３−２４８２５
号）を提案した。Therefore, prior to the present invention, the present applicant has proposed that by exchanging heat between the engine cooling water and exhaust gas coming out of the water jacket in an exhaust heat absorber, the engine cooling water absorbs the thermal energy possessed by the exhaust gas, An exhaust heat recovery device (patent application No. 63-24825
No.) was proposed.
（解決しようとする課題）
前記光に提案したエンジンの排熱回収装置では、ウォー
タジャケット出口を覆っている蓋板部分にサーモスイッ
チを取り付け、サーモスイッチの設定温度を越えると、
エンジンを停止するように構成していた。ところがウォ
ータジャケット出口部分で温度検出すると、排気熱吸収
器内で熱媒液が沸騰していてもそれを検知することがで
きない。(Problem to be solved) In the engine exhaust heat recovery device proposed by Hikari, a thermoswitch is attached to the cover plate that covers the water jacket outlet, and when the temperature exceeds the set temperature of the thermoswitch,
It was configured to shut down the engine. However, if the temperature is detected at the outlet of the water jacket, it cannot be detected even if the heat transfer liquid is boiling inside the exhaust heat absorber.
熱媒液が沸騰すると排気熱吸収器の熱交換エレメントが
損傷し易く排気熱吸収器の寿命が著しく損なわれるとい
う問題があった。There is a problem in that when the heat transfer liquid boils, the heat exchange element of the exhaust heat absorber is easily damaged and the life of the exhaust heat absorber is significantly shortened.
本発明はこのような点に着目してなされたもので、排気
熱吸収器内で熱媒液が沸騰することを防止して排気熱吸
収器の寿命を延長できる排熱回収装置を提供することを
目的とする。The present invention has been made with attention to such points, and an object of the present invention is to provide an exhaust heat recovery device that can prevent the heat medium liquid from boiling within the exhaust heat absorber and extend the life of the exhaust heat absorber. With the goal.
（課題を解決するための手段）
上記目的を達成するために、本第１発明では、排気熱吸
収器（１３）における熱媒液出口の近傍部に液温検出器
を配置し、この液温検出器が設定温度以上の温度を検出
することに基づき排気ガス温度降下手段を作動させるよ
うに構成したことを特徴とし、また、本第２発明では、
エンジンの排気出口と排気熱吸収器の排気ガス流入口と
を連通ずる排気導出管と、排気熱吸収器の熱媒液室との
少なくとも一方に温度検出器を配置するとともに、排気
導出管と排気熱吸収器からの排気管とをバイパス路で連
通し、このバイパス路に流路開閉弁で連通遮断切換可能
に構成し、温度検出器が設定温度以上の温度を検出する
ことに基づき前記バイパス路を開通させるように構成し
たことを特徴としている。(Means for Solving the Problems) In order to achieve the above object, in the first invention, a liquid temperature detector is disposed in the vicinity of the heat medium liquid outlet in the exhaust heat absorber (13), and the liquid temperature The second invention is characterized in that it is configured to operate the exhaust gas temperature lowering means based on the detector detecting a temperature equal to or higher than the set temperature.
A temperature sensor is disposed in at least one of the exhaust outlet pipe that communicates the exhaust outlet of the engine with the exhaust gas inlet of the exhaust heat absorber and the heat medium liquid chamber of the exhaust heat absorber, and the exhaust outlet pipe and the exhaust The exhaust pipe from the heat absorber is connected to the exhaust pipe through a bypass path, and the bypass path is configured to be able to be switched between communication and cutoff with a flow path opening/closing valve. It is characterized by being configured to open.
（作 用）
本発明では、第１発明では、排気熱吸収器における熱媒
液出口の近傍部に液温検出器を配置しであるので、排気
熱吸収器内における最高温度部分で温度を検出すること
になる。そして、液温検出器が設定温度以上の温度を検
出することに基づきエンジン停止あるいはスローダウン
等の排気ガス温度降下手段を作動させるように構成して
いるので、排気熱吸収器内で熱媒液が沸騰することがな
くなる。(Function) In the present invention, in the first invention, the liquid temperature detector is arranged in the vicinity of the heat medium liquid outlet in the exhaust heat absorber, so the temperature is detected at the highest temperature part in the exhaust heat absorber. I will do it. The system is configured so that when the liquid temperature detector detects a temperature higher than the set temperature, the exhaust gas temperature lowering means such as engine stop or slowdown is activated. will no longer boil.
また、本第２発明では、エンジンの排気出口と排気熱吸
収器の排気ガス流入口とを連通ずる排気導出管と、排気
熱吸収器の熱媒液室との少なくとも一方に温度検出器を
配置するとともに、排気導出管と排気熱吸収器からの排
気管とをバイパス路で連通し、このバイパス路に流路開
閉弁で連通遮断切換可能に構成し、温度検出器が設定温
度以上の温度を検出することに基づき前記バイパス路を
開通させるように構成しているので、排気ガス泥あるい
は排気熱吸収器内での熱媒液の液温か所定湯度に達する
と、排気熱吸収器内に流れる排気ガス量が減少すること
になり、排気熱吸収器内での熱交換が少なくなって、熱
媒液が沸騰することを防止する。Further, in the second invention, a temperature sensor is disposed in at least one of the exhaust outlet pipe that communicates the exhaust outlet of the engine with the exhaust gas inlet of the exhaust heat absorber, and the heat medium liquid chamber of the exhaust heat absorber. At the same time, the exhaust outlet pipe and the exhaust pipe from the exhaust heat absorber are connected through a bypass path, and a flow path opening/closing valve is configured in this bypass path so that the communication can be switched off and on, and the temperature detector detects a temperature higher than the set temperature. Since the bypass passage is opened based on the detection, when the liquid temperature of the exhaust gas mud or the heat transfer liquid in the exhaust heat absorber reaches a predetermined temperature, the heat transfer fluid flows into the exhaust heat absorber. The amount of exhaust gas is reduced, and heat exchange within the exhaust heat absorber is reduced, thereby preventing the heat transfer liquid from boiling.
（実施例）
図面は本発明の実施例を示し、第１図は要部の縦断面図
、第２図は横型水冷エンジン分解斜視図、第３図は要部
の平面図、第４図は本発明に係る横型水冷エンジンの排
熱回収装置を備えたエンジン発電機の正面図である。(Embodiment) The drawings show an embodiment of the present invention, in which Fig. 1 is a longitudinal sectional view of the main parts, Fig. 2 is an exploded perspective view of a horizontal water-cooled engine, Fig. 3 is a plan view of the main parts, and Fig. 4 is a longitudinal sectional view of the main parts. FIG. 1 is a front view of an engine generator equipped with an exhaust heat recovery device for a horizontal water-cooled engine according to the present invention.
このエンジン発電機は、防音ケース（１）内に横型水冷
エンジン（２）と、エンジン（２）で駆動される発電機
（３）とを並設し、エンジン（２）と発電機（３）をヘ
ルド伝動機構（４）で連動連結するとともに、防音ケー
ス（１）の天井壁に燃料タンクを設置し、かつ、防音ケ
ース（１）の−側端に電動モータ（５）で駆動される冷
却ファン（６）を備えたラジェータ（７）を配備して構
成されたものである。This engine generator has a horizontal water-cooled engine (2) and a generator (3) driven by the engine (2) installed side by side in a soundproof case (1). A fuel tank is installed on the ceiling wall of the soundproof case (1), and a cooling system driven by an electric motor (5) is installed at the negative end of the soundproof case (1). It is constructed by installing a radiator (7) equipped with a fan (6).
上記エンジン（２）の上側に本発明に係る排熱回収装置
が配設されており、この排熱回収装置は次のように構成
されている。An exhaust heat recovery device according to the present invention is disposed above the engine (2), and this exhaust heat recovery device is configured as follows.
エンジン（２）のシリング（８）に対応する位置でクラ
ンクケース（９）の上面にウォータジャケット（１０）
を開口させ、この開口部を覆う蓋板（１１）はエンジン
（２）のヘッドブロック（１２）の上側部分まで延長し
てあり、その延長部に排気熱吸収１（１３）の取り付は
部（Ｉ４）が形成してあり、蓋板（１１）に冷却水連通
路（１５）が形成しである。A water jacket (10) is placed on the top of the crankcase (9) at a position corresponding to the shilling (8) of the engine (2).
The cover plate (11) covering this opening extends to the upper part of the head block (12) of the engine (2), and the exhaust heat absorption 1 (13) is attached to the extension part. (I4) is formed, and a cooling water communication passage (15) is formed in the cover plate (11).
排気熱吸収！（１３）は内部に水平方向に走る排気ガス
通路（１６）を多段に形成するとともに、上下に位置す
る各排気ガス通路（１６）の両端部を垂直に配置した排
気ガス給排管（１７）で連通して、内部に液溜まりが生
じない形状に形成した熱交換ニレメン） （１ｇ）と、
熱交換エレメント（１８）の外側を取り囲んでい、るケ
ーシング（１９）とで構成しである。排気ガス給排管（
１７）は蓋板（１１）の排気熱吸収器取り付は部（１４
）の下面に形成した排気ガス流入口（２０）と排気ガス
流出口（２１）とに連通連結されている。排気ガス流入
口（２０）はエンジン（２）のヘッドブロック（１２）
に開口している排気口（２２）の上側に位置しており、
排気口（２２）と排気ガス流入口（２０）とをＬ字形の
排気導出管（２３）で連通して、エンジン（２）の燃焼
室（２４）から排出される燃焼排ガスを排気熱吸収器（
１３）の熱交換エレメント（１ｇ）内に導入するように
しである。一方、排気ガス流出口（２１）には排気管（
２５）を介してマフラ（図示略）が接続しである。Absorb exhaust heat! (13) is an exhaust gas supply/discharge pipe (17) in which exhaust gas passages (16) running horizontally are formed in multiple stages, and both ends of each exhaust gas passage (16) located above and below are arranged vertically. A heat exchanger (1g) formed in a shape that communicates with the inside and prevents liquid pooling inside.
It consists of a casing (19) surrounding the outside of the heat exchange element (18). Exhaust gas supply and exhaust pipe (
17) is the exhaust heat absorber mounting part (14) of the cover plate (11).
) is connected to an exhaust gas inlet (20) and an exhaust gas outlet (21) formed on the lower surface of the exhaust gas outlet. The exhaust gas inlet (20) is connected to the head block (12) of the engine (2).
It is located above the exhaust port (22) that opens to the
The exhaust port (22) and the exhaust gas inlet (20) are connected through an L-shaped exhaust outlet pipe (23), and the combustion exhaust gas discharged from the combustion chamber (24) of the engine (2) is transferred to an exhaust heat absorber. (
13) into the heat exchange element (1 g). On the other hand, the exhaust gas outlet (21) has an exhaust pipe (
25), a muffler (not shown) is connected thereto.
排気熱吸収器（１３）内で熱交換ニレメン） （１８）
の外側に位置する空洞部分は、前述の冷却水連通路（１
５）を介してエンジン（２）のウォータジャケット（１
０）に連通ずるとともに、排気熱吸収器（１３）のケー
シング（１９）の上部に形成した冷却液出口（２６）で
排熱回収２Ｎ（２７）に連通しており、この空洞部分が
ｌ′１１気熱吸収器（１３）の冷却液室（２８）となる
。Heat exchange in exhaust heat absorber (13) (18)
The hollow portion located outside the cooling water communication passage (1
5) to the water jacket (1) of the engine (2).
0), and also communicates with the exhaust heat recovery 2N (27) through a coolant outlet (26) formed at the top of the casing (19) of the exhaust heat absorber (13), and this hollow portion is connected to l' This becomes the cooling liquid chamber (28) of the 11 air heat absorber (13).
この冷却液室（１２）内の冷却液出口（２６）部分に突
入する状態でサーモスイッチ（２９）で構成した液温検
出器が配置してあり、この液温検出！ （２９）が設定
温度以上の温度を検知することにより、制御ユニット（
Ｕ）を介してスローダウン機構あるいはエンジン停止機
構等の排気ガス温度降下手段（３０）を作動させて、エ
ンジン（２）の燃焼室（２４）から排出される排気ガス
のガス温度を低温化させるように構成しである。A liquid temperature detector composed of a thermoswitch (29) is arranged so as to protrude into the coolant outlet (26) in the coolant chamber (12), and this liquid temperature is detected! (29) detects a temperature higher than the set temperature, the control unit (
The exhaust gas temperature lowering means (30), such as a slowdown mechanism or an engine stop mechanism, is operated via the engine (2) to lower the gas temperature of the exhaust gas discharged from the combustion chamber (24) of the engine (2). It is configured as follows.
排熱回収器（２７）はウォータジャケット（１０）の上
面開口部を閉塞している蓋板（１１）に固定されている
、ブレージングタイプの熱交換器で形成してあり、この
排熱回収器（２７）はエンジン冷却水を一次液、熱回収
液（例えば水道水）を二次液として、排熱回収器（２７
）内で一次液と二次液を対向流として接触させることに
より、−次液の保有する熱エネルギーを二次液が受けと
るようにしである。二次液と熱交換した後のエンジン冷
却水はラジェータ（７）で余分な熱を放出した後、エン
ジン（２）のウォータジャケット（１０）に戻るように
なっている。The exhaust heat recovery device (27) is formed of a brazing type heat exchanger fixed to a lid plate (11) that closes the upper opening of the water jacket (10). (27) uses engine cooling water as the primary liquid and heat recovery liquid (e.g. tap water) as the secondary liquid, and uses the exhaust heat recovery device (27) as the primary liquid.
), the primary liquid and the secondary liquid are brought into contact with each other in countercurrent flow, so that the secondary liquid receives the thermal energy held by the secondary liquid. After exchanging heat with the secondary liquid, the engine cooling water releases excess heat in the radiator (7) and then returns to the water jacket (10) of the engine (2).
符号（３１）は排熱回収器（２７）でのエンジン冷却水
流入口、（３２）はエンジン冷却水の流出口、（３３）
は熱回収液（二次液）の流入口、（３４）は熱回収液の
流出口で、（３５）は熱使用部である。Symbol (31) is the engine cooling water inlet of the exhaust heat recovery device (27), (32) is the engine cooling water outlet, and (33)
is an inlet for heat recovery liquid (secondary liquid), (34) is an outlet for heat recovery liquid, and (35) is a heat usage section.
第５図は本発明の別の実施例を示し、これは排気熱吸収
器（１３）の排気ガス流入口（２０）に連通している排
気ガス導出管（２３）と、排気ガス流出口（２１）に連
通している排気管（２５）とをバイパス路（３６）テ接
続し、このバイパス路（３６）に流路開閉弁（３７）を
配置するとともに、排気ガス導出管（２３）に排気ガス
温度検出Ｗ （３８）を突入させて配置し、また、排気
熱吸収器（１３）の冷却液室（２８）の上部に液温検出
器（２９）を配置したものである。そして、液温検出器
（２９）あるいは排気ガス温度検出器（３８）が設定温
度以上の温度を検出すると、その検出信号に基づいてア
クチュエータ（３９）を作動させて流路開閉弁（３７）
を開弁操作し、排気ガスをバイパス路（３６）を介して
排気ガス導出管（２３）から排気管（２５）に短絡させ
、排気熱吸収１１（１３）内を通る排気ガス量を減少さ
せて、排気熱吸収Ｂ（１３）内での冷却液の沸騰を抑制
するように形成しである。FIG. 5 shows another embodiment of the present invention, which includes an exhaust gas outlet pipe (23) communicating with the exhaust gas inlet (20) of the exhaust heat absorber (13), and an exhaust gas outlet (20) communicating with the exhaust gas inlet (20) of the exhaust heat absorber (13). The exhaust pipe (25) communicating with the exhaust pipe (21) is connected to a bypass passage (36), and a passage opening/closing valve (37) is disposed in the bypass passage (36), and an exhaust gas outlet pipe (23) is connected to the exhaust pipe (25) communicating with the exhaust pipe (21). An exhaust gas temperature detector W (38) is arranged in a protruding manner, and a liquid temperature detector (29) is arranged above the coolant chamber (28) of the exhaust heat absorber (13). When the liquid temperature detector (29) or the exhaust gas temperature detector (38) detects a temperature higher than the set temperature, the actuator (39) is actuated based on the detection signal, and the flow path opening/closing valve (37) is activated.
The valve is opened to short-circuit the exhaust gas from the exhaust gas outlet pipe (23) to the exhaust pipe (25) via the bypass path (36), thereby reducing the amount of exhaust gas passing through the exhaust heat absorption 11 (13). It is formed so as to suppress boiling of the coolant within the exhaust heat absorption B (13).
この流路開閉弁（３７）の配設位置としては、第６図（
ａ）に示すバイパス路（３６）の途中（第５図に示した
実施例のもの）のほか、第６図（ｂ）に示すように排気
ガス導出管（２３）とバイパス路（３６）の分岐部に三
方弁を配置して、排気ガスをバイパス路（３Ｂ）と排気
熱吸収器（１３）とに択一的に流すようにしてもよく、
また、第６図（Ｃ）に示すように、排気ガス導出管（２
３）とバイパス路（３６）とにそれぞれ流路開閉弁を配
置し、両弁を同期して開閉作動させることにより、排気
熱吸収器（１３）とバイパス路（３６）とに流れるガス
量を制御するようにしてもよい。The location of this flow path on-off valve (37) is shown in Figure 6 (
In addition to the middle of the bypass passage (36) shown in a) (in the embodiment shown in Fig. 5), as shown in Fig. 6(b), there is a section between the exhaust gas outlet pipe (23) and the bypass passage (36). A three-way valve may be arranged at the branch part to allow the exhaust gas to flow alternatively to the bypass path (3B) and the exhaust heat absorber (13),
In addition, as shown in FIG. 6(C), an exhaust gas outlet pipe (2
3) and the bypass path (36), and by opening and closing both valves synchronously, the amount of gas flowing into the exhaust heat absorber (13) and the bypass path (36) can be reduced. It may also be controlled.
排気導出管（２３）と排気管（２５）とをバイパス路（
３６）で連通し、バイパス路（３６）を流路開閉弁（３
７）で開閉制御するようにすると、エンジンを停止させ
たり、スローダウンさせたりすることなく、排気熱吸収
器（１３）での冷却液の沸騰を抑止することができる。The exhaust outlet pipe (23) and the exhaust pipe (25) are connected by a bypass path (
36), and the bypass passage (36) is connected to the passage opening/closing valve (36).
By controlling the opening and closing in step 7), boiling of the coolant in the exhaust heat absorber (13) can be suppressed without stopping or slowing down the engine.
（効 果）
本第１発明では、排気熱吸収器における熱媒液出口の近
傍部に液温検出器を配置しであるので、排気熱吸収器内
における最高温度部分で温度を検出することができる。(Effects) In the first invention, since the liquid temperature detector is arranged near the heat medium liquid outlet in the exhaust heat absorber, it is possible to detect the temperature at the highest temperature part in the exhaust heat absorber. can.
そして、排気熱吸収器内の熱媒液の液温が設定温度以上
になったことを液温検出器が検出することに基づきエン
ジン停止操作あるいはスローダウン操作等の排気ガス温
度降下手段を作動させるように構成しているので、υＦ
気熟熱吸収器内熱媒液が沸騰することがな（なる。Then, when the liquid temperature detector detects that the temperature of the heat medium liquid in the exhaust heat absorber has exceeded the set temperature, exhaust gas temperature reduction means such as engine stop operation or slowdown operation are activated. Since it is configured as follows, υF
The heat medium liquid in the aging heat absorber will not boil.
これにより、排気熱吸収器の熱交換エレメントの損傷が
小さくなり、排気熱吸収器の寿命を延長させることがで
きる。This reduces damage to the heat exchange element of the exhaust heat absorber and extends the life of the exhaust heat absorber.
また、本第２発明では、エンジンの排気出口と排気熱吸
収器の排気ガス流入口とを連通ずる排気導出管と、排気
熱吸収器の熱媒液室との少なくとも一方に温度検出器を
配置するとともに、排気導出管と排気熱吸収器からの排
気管とをバイア Ｘ＋ス路で連通し、このバイパス路に
流路開閉弁で連通遮断切換可能に構成し、温度検出器が
設定温度以上の温度を検出することに基づき前記バイパ
ス路を開通させるように構成しているので、排気ガス温
あるいは排気熱吸収器内での熱媒液の液温が所定温度に
達すると、排気熱吸収器内に流れる排気ガス量が減少す
ることになり、排気熱吸収器内での熱交換が少なくなっ
て、熱媒液が沸騰することがなくなる。従って、排気熱
吸収器の熱交換エレメントの損傷を抑制することができ
るから、排気熱吸収器の耐久性を向上させることができ
るうえ、エンジンを停止させたり、スローダウンさせた
りしなくてもよいことから、継続して作業を行うことが
できる。Further, in the second invention, a temperature sensor is disposed in at least one of the exhaust outlet pipe that communicates the exhaust outlet of the engine with the exhaust gas inlet of the exhaust heat absorber, and the heat medium liquid chamber of the exhaust heat absorber. At the same time, the exhaust outlet pipe and the exhaust pipe from the exhaust heat absorber are connected through a via X+S path, and this bypass path is configured so that the communication can be switched off using a flow path on/off valve. Since the bypass passage is opened based on temperature detection, when the temperature of the exhaust gas or the temperature of the heat transfer liquid in the exhaust heat absorber reaches a predetermined temperature, the bypass passage in the exhaust heat absorber is opened. This reduces the amount of exhaust gas flowing through the exhaust heat absorber, reducing heat exchange within the exhaust heat absorber and preventing the heat transfer liquid from boiling. Therefore, damage to the heat exchange element of the exhaust heat absorber can be suppressed, so the durability of the exhaust heat absorber can be improved, and there is no need to stop or slow down the engine. Therefore, you can continue working.
図面は本発明の実施例を示し、第１図は要部の縦断面図
、第２図は横型水冷エンジン分解斜視図、第３図は要部
の平面図、第４図は本発明に係る横型水冷エンジンの排
熱回収装置を備えたエンジン発電機の正面図、第５図は
別実施例の一部破断側面図、第６図は流路開閉弁の配設
位置を示す回路図である。
２・・・エンジン、ｌＯ・ ウォータジャケット、１３
・・排気熱吸収器、２０・・（１３）の排気ガス流入口
、２２・・（２）の排気出口、２３・・・排気導出管、
２４・・・燃焼室、２５・・排気管、２６・・・熱媒液
出口、２７・・・排熱回収器、２８・・・（１３）の熱
媒液室、２９・・・液温検出器、３０・・・排気ガス温
度降下手段、３６・・・バイパス路、３７・流路開閉弁
、３８・・・温度検出器。
特許出願人 久保田鉄工株式会社
・、・１ノ
第４図
第２図
第５図The drawings show an embodiment of the present invention; FIG. 1 is a vertical sectional view of the main parts, FIG. 2 is an exploded perspective view of a horizontal water-cooled engine, FIG. 3 is a plan view of the main parts, and FIG. 4 is a diagram according to the present invention. FIG. 5 is a front view of an engine generator equipped with an exhaust heat recovery device for a horizontal water-cooled engine, FIG. 5 is a partially cutaway side view of another embodiment, and FIG. 6 is a circuit diagram showing the arrangement position of a flow path opening/closing valve. . 2...Engine, lO/water jacket, 13
...exhaust heat absorber, 20...(13) exhaust gas inlet, 22...(2) exhaust outlet, 23...exhaust outlet pipe,
24... Combustion chamber, 25... Exhaust pipe, 26... Heat medium liquid outlet, 27... Exhaust heat recovery device, 28... (13) heat medium liquid chamber, 29... Liquid temperature Detector, 30... Exhaust gas temperature lowering means, 36... Bypass path, 37. Flow path opening/closing valve, 38... Temperature detector. Patent applicant: Kubota Iron Works Co., Ltd....1, Figure 4, Figure 2, Figure 5
Claims (1)
排熱回収器（２７）とを付設し、排気熱吸収器（１３）
をエンジン（２）の燃焼室（２４）からマフラに至るま
での間に配置し、この排気熱吸収器（１３）にエンジン
（２）のウォータジャケット（１０）を連通させるとと
もに、排気熱吸収器（１３）を排熱回収器（２７）に連
通させ、エンジン（２）のウォータジャケット（１０）
内の熱媒液が排気熱吸収器（１３）、排熱回収器（２７
）を順に通過して循環するように構成した横型水冷エン
ジンの排熱回収装置において、 排気熱吸収器（１３）における熱媒液出口（２６）の近
傍部に液温検出器（２９）を配置し、この液温検出器（
２９）が設定温度以上の温度を検出することに基づき排
気ガス温度降下手段（３０）を作動させるように構成し
たことを特徴とする横型水冷エンジンの排熱回収装置 ２、エンジン（２）の排気出口（２２）と排気熱吸収器
（１３）の排気ガス流入口（２０）とを連通する排気導
出管（２３）と、排気熱吸収器（１３）の熱媒液室（２
８）との少なくとも一方に温度検出器（３８）（２９）
を配置するとともに、排気導出管（２３）と排気熱吸収
器（１３）からの排気管（２５）とをバイパス路（３６
）で連通し、このバイパス路（３６）に流路開閉弁（３
７）で連通遮断切換可能に構成し、温度検出器（３８）
（２９）が設定温度以上の温度を検出することに基づき
前記バイパス路（３６）を開通させるように構成したこ
とを特徴とする横型水冷エンジンの排熱回収装置[Claims] 1. An exhaust heat absorber (13) and an exhaust heat recovery device (27) are attached to the horizontal water-cooled engine (2), and the exhaust heat absorber (13)
is placed between the combustion chamber (24) of the engine (2) and the muffler, and the water jacket (10) of the engine (2) is communicated with the exhaust heat absorber (13). (13) is connected to the exhaust heat recovery device (27), and the water jacket (10) of the engine (2) is connected to the exhaust heat recovery device (27).
The heat transfer liquid inside the exhaust heat absorber (13) and the exhaust heat recovery device (27)
) In the exhaust heat recovery device for a horizontal water-cooled engine configured to circulate through the heat transfer medium in sequence, a liquid temperature detector (29) is arranged near the heat transfer liquid outlet (26) in the exhaust heat absorber (13). And this liquid temperature detector (
29) is configured to operate an exhaust gas temperature lowering means (30) based on detecting a temperature equal to or higher than a set temperature, an exhaust heat recovery device 2 for a horizontal water-cooled engine; The exhaust outlet pipe (23) communicates the outlet (22) with the exhaust gas inlet (20) of the exhaust heat absorber (13), and the heat medium liquid chamber (2) of the exhaust heat absorber (13).
8) at least one of the temperature detectors (38) (29)
At the same time, the exhaust outlet pipe (23) and the exhaust pipe (25) from the exhaust heat absorber (13) are connected to the bypass path (36).
), and a flow path opening/closing valve (3) is connected to this bypass path (36).
7) so that communication can be switched off, and the temperature sensor (38)
An exhaust heat recovery device for a horizontal water-cooled engine, characterized in that (29) is configured to open the bypass passage (36) based on detecting a temperature equal to or higher than a set temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30459288A JPH02149753A (en) | 1988-11-30 | 1988-11-30 | Exhaust heat recovering device for horizontal water-cooled engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP30459288A JPH02149753A (en) | 1988-11-30 | 1988-11-30 | Exhaust heat recovering device for horizontal water-cooled engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH02149753A true JPH02149753A (en) | 1990-06-08 |
Family
ID=17934857
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP30459288A Pending JPH02149753A (en) | 1988-11-30 | 1988-11-30 | Exhaust heat recovering device for horizontal water-cooled engine |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH02149753A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645262A (en) * | 2018-05-28 | 2018-10-12 | 张化机（苏州）重装有限公司 | A kind of jacketed type exchanger |
-
1988
- 1988-11-30 JP JP30459288A patent/JPH02149753A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108645262A (en) * | 2018-05-28 | 2018-10-12 | 张化机（苏州）重装有限公司 | A kind of jacketed type exchanger |
| CN108645262B (en) * | 2018-05-28 | 2023-11-21 | 张化机（苏州）重装有限公司 | Jacket type heat exchanger |
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