JPH06249010A - Operation control device for exhaust heat recovery device of engine heat pump - Google Patents
Operation control device for exhaust heat recovery device of engine heat pumpInfo
- Publication number
- JPH06249010A JPH06249010A JP5062697A JP6269793A JPH06249010A JP H06249010 A JPH06249010 A JP H06249010A JP 5062697 A JP5062697 A JP 5062697A JP 6269793 A JP6269793 A JP 6269793A JP H06249010 A JPH06249010 A JP H06249010A
- Authority
- JP
- Japan
- Prior art keywords
- engine
- exhaust
- exhaust gas
- temperature
- gas outlet
- 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
Classifications
-
- 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
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A30/00—Adapting or protecting infrastructure or their operation
- Y02A30/27—Relating to heating, ventilation or air conditioning [HVAC] technologies
- Y02A30/274—Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine
-
- 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
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Landscapes
- Control Of Vehicle Engines Or Engines For Specific Uses (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
(57)【要約】
【目的】 エンジンヒートポンプの熱交換エレメントの
目詰りを予知し交換時期を推定、点検期間を延長すると
ともに排気フレキシブルホースの破損を防止する。
【構成】 エンジン１の排気ポート２に排気ガスの排熱
を回収利用する排気熱回収用熱交換器３を介してマフラ
４・フレキシブルホース５・排気管６を順に連通し、エ
ンジン１で冷媒圧縮機７を駆動して冷房装置８を作動さ
せる。マフラ４の出口４ａに排気ガス出口温度検出用温
度センサ９を設け異常警報器１０を備えた運転制御装置
１１に連携する。排気ガス出口温度Ｔ１が強制運転温度
領域Ｔ０以下では通常運転し、強制運転温度領域Ｔ０内
では強制疑似負荷運転して同温度領域Ｔ０以下に下がっ
た時に通常運転に戻る。強制疑似負荷運転を設定繰返し
回数Ｎだけ繰り返しても強制運転温度領域Ｔ０以下にな
らない時には異常警報器１０から異常警報を送出させ
る。強制運転温度領域Ｔ０以上の時には運転停止する。
(57) [Summary] [Purpose] Predict the clogging of the heat exchange element of the engine heat pump, estimate the replacement time, extend the inspection period, and prevent damage to the exhaust flexible hose. [Composition] A muffler 4, a flexible hose 5, and an exhaust pipe 6 are sequentially connected to an exhaust port 2 of an engine 1 through an exhaust heat recovery heat exchanger 3 that recovers and uses exhaust heat of exhaust gas, and a refrigerant compression is performed by the engine 1. The machine 7 is driven to operate the cooling device 8. An exhaust gas outlet temperature detecting temperature sensor 9 is provided at the outlet 4a of the muffler 4 and cooperates with an operation control device 11 having an abnormality alarm device 10. When the exhaust gas outlet temperature T1 is equal to or lower than the forced operation temperature range T0, the normal operation is performed, and when the exhaust gas outlet temperature T1 is equal to or lower than the temperature range T0, the forced pseudo load operation is performed to return to the normal operation. When the forced pseudo load operation is repeated for the set number of times N and the temperature does not fall below the forced operation temperature region T0, the abnormality alarm device 10 issues an abnormality alarm. When the temperature is above the forced operating temperature range T0, the operation is stopped.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、エンジンヒートポンプ
の排気熱回収装置の運転制御装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an operation control device for an exhaust heat recovery device of an engine heat pump.
【０００２】[0002]
【従来の技術】エンジンヒートポンプの排気熱回収装置
は、従来技術では、例えば図３に示すように、次のよう
に構成されたものがある。すなわち、エンジン１の排気
ポート２に、排気熱回収用熱交換噐３を介してマフラ４
・フレキシブルホース５・排気管６を順に連通する。そ
して、上記エンジン１の排気ガスの排熱を上記排気熱回
収用熱交換噐３によりエンジン冷却水に回収利用すると
ともに、そのエンジン１で冷媒圧縮機７を駆動して冷暖
房装置８を作動させるように構成する。上記排気熱回収
用熱交換噐３は、例えば図１（Ｂ）に示すように、内部
に排気ガス通路３０を有する熱交換エレメント３ａとエ
ンジン冷却水通路３１を形成するケーシング３ｂとで構
成されている。この熱交換エレメント３ａは、中空内部
に多数のフィン３ｃを形成した偏平長円形の単位エレメ
ントを上下に適当間隔へだてて複数個積層し、各単位エ
レメントの両端側を連通部３ｄ・３ｅで互いに連通さ
せ、一端側の連通部３ｄを前記エンジン１の排気ポート
２に接続して排気ガス入口とするとともに、他端側の連
通部３ｅをマフラ４に連通する排気ガス出口３２に接続
したものである。2. Description of the Related Art As an exhaust heat recovery system for an engine heat pump, there is a conventional system configured as follows, for example, as shown in FIG. That is, the muffler 4 is connected to the exhaust port 2 of the engine 1 through the exhaust heat recovery heat exchanger 3.
-Connect the flexible hose 5 and the exhaust pipe 6 in order. Then, the exhaust heat of the exhaust gas of the engine 1 is recovered and used as engine cooling water by the exhaust heat recovery heat exchanger 3, and the engine 1 drives the refrigerant compressor 7 to operate the cooling / heating device 8. To configure. For example, as shown in FIG. 1B, the exhaust heat recovery heat exchanger 3 includes a heat exchange element 3a having an exhaust gas passage 30 therein and a casing 3b forming an engine cooling water passage 31. There is. This heat exchange element 3a is formed by stacking a plurality of flat oval unit elements having a large number of fins 3c formed inside the hollow by vertically arranging them at appropriate intervals, and connecting both end sides of each unit element with communicating portions 3d and 3e. The communication portion 3d on one end side is connected to the exhaust port 2 of the engine 1 to serve as an exhaust gas inlet, and the communication portion 3e on the other end side is connected to an exhaust gas outlet 32 communicating with the muffler 4. .
【０００３】[0003]
【発明が解決しようとする課題】上記の従来技術では次
の問題がある。前記排気熱回収用熱交換噐３は、エンジ
ン１の長時間運転の後期には、エンジン１の排気ガス中
の煤やオイルスラッジが熱交換エレメント３ａの内部の
フィン３ｃに堆積して目詰りなどの異常が発生し、図２
（Ｂ）に示すように、排圧が１５０ｍｍＨｇ以上になっ
たり、排気ガス出口温度Ｔ１が１５０℃以上に上昇する
ことがある。この熱交換エレメント３ａの目詰りは、高
速高負荷運転では発生し難いが、低速低負荷運転が多い
エンジンヒートポンプなどの長時間運転で発生し易い。 （イ）従来技術では、定期点検時を利用して単にエンジ
ン１の排気ガス出口温度Ｔ１と排気熱回収用熱交換噐３
の入口側のエンジン背圧とを測定するなどで、上記熱交
換エレメント３ａの目詰り状態を推定するのみであっ
た。しかも、上記定期点検時の排気ガス出口温度Ｔ１と
背圧との測定には非常に手間がかかり、人手不足からそ
の点検間隔が長期化する傾向にある。 （ロ）さらに、熱交換エレメント３ａの目詰りが発生す
ると、排熱回収量が低下するうえ排気ガス出口温度Ｔ１
が上昇して、マフラ４に接続されたゴム製のフレキシブ
ルホース５を破損させる事がある。 本発明は、（イ）熱交換エレメントの目詰り異常を予知
してその交換時期を推定し人手のかかるメンテナンスサ
イクルを延長する事、（ロ）排気ガス出口温度の上昇に
よるフレキシブルゴムホースの破損を防止する事、を課
題とする。The above-mentioned conventional techniques have the following problems. In the exhaust heat recovery heat exchanging device 3, the soot and oil sludge in the exhaust gas of the engine 1 are accumulated on the fins 3c inside the heat exchanging element 3a in the latter part of the long-term operation of the engine 1 to cause clogging. 2 occurred, and
As shown in (B), the exhaust pressure may reach 150 mmHg or higher, or the exhaust gas outlet temperature T1 may rise to 150 ° C. or higher. The clogging of the heat exchange element 3a is unlikely to occur during high-speed and high-load operation, but is likely to occur during long-time operation of an engine heat pump, which often has low-speed and low-load operation. (A) In the prior art, the exhaust gas outlet temperature T1 of the engine 1 and the exhaust heat recovery heat exchanger 3 are simply utilized by utilizing the time of regular inspection.
It was only necessary to estimate the clogging state of the heat exchange element 3a by measuring the engine back pressure on the inlet side of the above. Moreover, the exhaust gas outlet temperature T1 and the back pressure at the time of the above-mentioned regular inspection are very time-consuming to measure, and the inspection interval tends to be long due to lack of manpower. (B) Further, when the heat exchange element 3a is clogged, the exhaust heat recovery amount decreases and the exhaust gas outlet temperature T1
May rise and damage the rubber flexible hose 5 connected to the muffler 4. The present invention (a) predicts a clogging abnormality of a heat exchange element and estimates the replacement time to extend a maintenance cycle that requires labor, and (b) prevents the flexible rubber hose from being damaged due to an increase in exhaust gas outlet temperature. The task is to do.
【０００４】[0004]
【課題を解決するための手段】本発明は、上記従来技術
において、上記課題を達成するために、例えば図１及び
図２に示すように、次の改良構造を追加したものであ
る。マフラ４の出口４ａに、排気ガス出口温度検出用温
度センサ９を設けるとともに、このガス温度センサ９に
異常警報器１０を備えた運転制御装置１１を連携させ
る。上記運転制御装置１１は、上記温度センサ９が検出
した排気ガス出口温度Ｔ１が強制運転温度領域Ｔ０以下
の場合には、前記エンジン１を通常運転する。そして、
上記排気ガス出口温度Ｔ１が強制運転温度領域Ｔ０内に
達した場合には、前記エンジン１を強制的に疑似負荷運
転させる。また、上記強制疑似負荷運転により前記排気
ガス出口温度Ｔ１が強制運転温度領域Ｔ０以下に下がっ
た場合には、前記エンジン１を通常運転する。さらに、
前記強制疑似負荷運転を設定繰返し回数Ｎだけ繰り返し
ても前記排気ガス出口温度Ｔ１が強制運転温度領域Ｔ０
以下に下がらない場合には、前記異常警報器１０から異
常警報を送出させる。そして、上記排気ガス出口温度Ｔ
１が強制運転温度領域Ｔ０以上の場合には、前記エンジ
ン１を運転停止させるように構成する。In order to achieve the above object, the present invention adds the following improved structure to the above prior art as shown in FIGS. 1 and 2, for example. An exhaust gas outlet temperature detection temperature sensor 9 is provided at the outlet 4a of the muffler 4, and an operation control device 11 having an abnormality alarm 10 is linked to the gas temperature sensor 9. The operation control device 11 normally operates the engine 1 when the exhaust gas outlet temperature T1 detected by the temperature sensor 9 is equal to or lower than the forced operation temperature region T0. And
When the exhaust gas outlet temperature T1 reaches the forced operation temperature range T0, the engine 1 is forcibly operated in a pseudo load. Further, when the exhaust gas outlet temperature T1 falls below the forced operation temperature region T0 due to the forced pseudo load operation, the engine 1 is normally operated. further,
Even if the forced pseudo load operation is repeated for the set number of times N, the exhaust gas outlet temperature T1 remains in the forced operation temperature region T0.
If the temperature does not drop below the level, the abnormality alarm device 10 sends an abnormality alarm. Then, the exhaust gas outlet temperature T
When 1 is above the forced operating temperature range T0, the engine 1 is stopped.
【０００５】[0005]
【作用】本発明は次のように作用する。マフラ４の出口
４ａに設けた排気ガス出口温度検出用温度センサ９は、
マフラ４内の排気ガス出口温度Ｔ１を検出し、図２
（Ａ）に示すように、この排気ガス出口温度Ｔ１が強制
運転温度領域Ｔ０（例えば約１５０℃乃至１７０℃）以
下の場合には、その温度センサ９に連携させた運転制御
装置１１によりエンジン１を通常運転する。そして、排
気熱回収用熱交換噐３の熱交換エレメント３ａに目詰り
などの異常が発生して、排熱回収量の低下により上記排
気ガス出口温度Ｔ１が強制運転温度領域Ｔ０内に達した
場合には、前記エンジン１を強制的に疑似負荷運転させ
る。この強制疑似負荷運転により、上記熱交換エレメン
ト３ａの内部のフィン３ｃに堆積した煤やオイルスラッ
ジが吹き飛ばされて清浄化され、排熱回収量が上昇する
ため前記排気ガス出口温度Ｔ１が再び強制運転温度領域
Ｔ０以下に下がる。この場合には、前記運転制御装置１
１によりエンジン１を通常運転する。さらに、前記強制
疑似負荷運転を設定繰返し回数Ｎ（例えば５回）だけ繰
り返しても前記排気ガス出口温度Ｔ１が強制運転温度領
域Ｔ０以下に下がらない場合には、前記運転制御装置１
１内の異常警報器１０から異常警報を送出させる。そし
て、上記排気ガス出口温度Ｔ１が強制運転温度領域Ｔ０
以上の場合には、前記運転制御装置１１によりエンジン
１を運転停止させる。The present invention operates as follows. The exhaust gas outlet temperature detection temperature sensor 9 provided at the outlet 4a of the muffler 4 is
The exhaust gas outlet temperature T1 in the muffler 4 is detected, as shown in FIG.
As shown in (A), when the exhaust gas outlet temperature T1 is equal to or lower than the forced operating temperature region T0 (for example, about 150 ° C. to 170 ° C.), the operation control device 11 linked to the temperature sensor 9 causes the engine 1 to operate. Drive normally. When an abnormality such as clogging occurs in the heat exchange element 3a of the heat exchanger 3 for exhaust heat recovery, and the exhaust gas outlet temperature T1 reaches the forced operation temperature region T0 due to a decrease in the amount of exhaust heat recovery. First, the engine 1 is forcibly operated under a pseudo load. By this forced pseudo load operation, soot and oil sludge accumulated on the fins 3c inside the heat exchange element 3a are blown away and cleaned, and the exhaust heat recovery amount rises, so the exhaust gas outlet temperature T1 is again forcedly operated. It falls below the temperature region T0. In this case, the operation control device 1
1, the engine 1 is normally operated. Further, if the exhaust gas outlet temperature T1 does not fall below the forced operation temperature region T0 even after the forced pseudo load operation is repeated the set number of times N (for example, 5 times), the operation control device 1
An abnormality alarm is sent from the abnormality alarm device 10 in 1. Then, the exhaust gas outlet temperature T1 is in the forced operation temperature region T0.
In the above cases, the operation of the engine 1 is stopped by the operation control device 11.
【０００６】[0006]
【発明の効果】本発明は、上記のように構成され作用す
ることから、次の効果を奏する。マフラ４の出口４ａに
設けた排気ガス出口温度検出用温度センサ９でマフラ４
内の排気ガス出口温度Ｔ１を検出し、この排気ガス出口
温度Ｔ１が強制運転温度領域Ｔ０の範囲内の場合には、
上記温度センサ９に連携させた運転制御装置１１により
エンジン１を強制疑似負荷運転して堆積物を除去すると
ともに、この強制疑似負荷運転が設定繰返し回数Ｎ以上
になった場合には、熱交換エレメント３ａの目詰り異常
として運転制御装置１１内の異常警報器１０から異常警
報を送出させる。さらに、上記排気ガス出口温度Ｔ１が
強制運転温度領域Ｔ０以上の場合には、前記エンジン１
を運転停止させる。これにより、（イ）熱交換エレメン
トの目詰り異常を予知してその交換時期を推定し人手の
かかるメンテナンスサイクルを延長する事、（ロ）排気
ガス出口温度の上昇によるフレキシブルゴムホースの破
損を防止する事、ができる。The present invention has the following effects because it is constructed and operates as described above. The exhaust gas outlet temperature detection temperature sensor 9 provided at the outlet 4a of the muffler 4 causes the muffler 4 to
The exhaust gas outlet temperature T1 in the inside is detected, and when the exhaust gas outlet temperature T1 is within the range of the forced operation temperature region T0,
When the engine 1 is operated by the forced pseudo load operation by the operation control device 11 linked to the temperature sensor 9 to remove the deposits and the forced pseudo load operation reaches the set number of times N or more, the heat exchange element As the clogging abnormality of 3a, an abnormality alarm is sent from the abnormality alarm device 10 in the operation control device 11. Further, when the exhaust gas outlet temperature T1 is equal to or higher than the forced operating temperature region T0, the engine 1
Stop the operation. This allows (a) predicting the clogging abnormality of the heat exchange element and estimating the replacement time to extend the maintenance cycle, and (b) preventing the flexible rubber hose from being damaged due to the rise in the exhaust gas outlet temperature. Things can be done.
【０００７】[0007]
【実施例】以下、本発明の実施例を図面で説明する。図
１（Ａ）はエンジンヒートポンプの排気熱回収装置の概
略構成図、図（Ｂ）は排気熱回収用熱交換噐の要部断面
図、図２（Ａ）は運転制御装置の動作フローチャート、
図２（Ｂ）は運転時間対排気出口温度及び排圧の変化を
示す図である。図において、エンジン１の排気ポート２
に、排気熱回収用熱交換噐３を介してマフラ４・フレキ
シブルホース５・排気管６を順に連通してある。また、
上記エンジン１のウォータジャケット２０に、上記排気
熱回収用熱交換噐３の受熱路２１・温水路２２・温水用
熱交換器２３の授熱路２３ａ・冷水路２４を順に循環状
に接続してある。そして、上記エンジン１の排気ガスの
排熱を上記排気熱回収用熱交換噐３によりエンジン冷却
水に回収利用するとともに、そのエンジン１で冷媒圧縮
機７を駆動して冷暖房装置８を作動させるように構成し
てある。上記排気熱回収用熱交換噐３は、図１（Ｂ）に
示すように、内部に排気ガス通路３０を有する熱交換エ
レメント３ａとエンジン冷却水通路３１を形成するケー
シング３ｂとで構成されている。この熱交換エレメント
３ａは、中空内部に多数のフィン３ｃを形成した偏平長
円形の単位エレメントを上下に適当間隔へだてて複数個
積層し、各単位エレメントの両端側を連通部３ｄ・３ｅ
で互いに連通させ、一端側の連通部３ｄを前記エンジン
１の排気ポート２に接続して排気ガス入口とするととも
に、他端側の連通部３ｅをマフラ４に連通する排気ガス
出口３２に接続したものである。上記エンジン１は燃料
ガス入口２５から燃料ガスを供給して運転され、マフラ
ー４・フレキシブルホース５・排気管６を介して排気ガ
スを排出する。又、エンジン１にはその回転軸にファン
２６が設けられていてエンジン外周を空冷する。前記温
水用熱交換噐２３には給湯用の温水入口２７と温水出口
２８とがあり、冷却水ポンプ２９により圧送され、エン
ジン１のウォータジャケット２０及び排気熱回収用熱交
換噐３の受熱路２１を通るエンジン冷却水が、ウォータ
ジャケット２０の温熱及び排気ガスの排熱を吸収して、
上記温水用熱交換噐２３の授熱路２３ａから上記給湯用
温水へ放出して利用するようになっている。また、前記
冷暖房装置８は複数の室内機８ａ及び室外機８ｂを備
え、冷媒圧縮機７で圧送される冷媒を四方弁７ａで方向
を切り換えて、各室内機８ａにより冷房又は暖房を行
う。Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 (A) is a schematic configuration diagram of an exhaust heat recovery device for an engine heat pump, FIG. 1 (B) is a sectional view of an essential part of an exhaust heat recovery heat exchanger, and FIG. 2 (A) is an operation flowchart of an operation control device.
FIG. 2B is a diagram showing changes in operating time versus exhaust outlet temperature and exhaust pressure. In the figure, the exhaust port 2 of the engine 1
In addition, the muffler 4, the flexible hose 5, and the exhaust pipe 6 are connected in this order through the exhaust heat recovery heat exchanger 3. Also,
To the water jacket 20 of the engine 1, the heat receiving path 21, the hot water path 22, the heat transfer path 23a of the heat exchanger 23 for hot water, and the cold water path 24 of the heat exchanger 3 for recovering exhaust heat are sequentially connected in a circulating manner. is there. Then, the exhaust heat of the exhaust gas of the engine 1 is recovered and used as engine cooling water by the exhaust heat recovery heat exchanger 3, and the engine 1 drives the refrigerant compressor 7 to operate the cooling / heating device 8. Is configured. As shown in FIG. 1 (B), the exhaust heat recovery heat exchanger 3 includes a heat exchange element 3a having an exhaust gas passage 30 therein and a casing 3b forming an engine cooling water passage 31. . This heat exchange element 3a is formed by stacking a plurality of flat oval unit elements having a large number of fins 3c formed in the hollow inside thereof at appropriate intervals, and connecting both end sides of each unit element to the communicating portions 3d and 3e.
And the communication portion 3d on one end side is connected to the exhaust port 2 of the engine 1 to serve as an exhaust gas inlet, and the communication portion 3e on the other end side is connected to an exhaust gas outlet 32 communicating with the muffler 4. It is a thing. The engine 1 is operated by supplying the fuel gas from the fuel gas inlet 25, and exhausts the exhaust gas through the muffler 4, the flexible hose 5, and the exhaust pipe 6. Further, the engine 1 is provided with a fan 26 on its rotating shaft to air-cool the outer periphery of the engine. The hot water heat exchanger 23 has a hot water inlet 27 and a hot water outlet 28 for supplying hot water, and is pumped by a cooling water pump 29 to receive the water jacket 20 of the engine 1 and the heat receiving path 21 of the heat exchanger 3 for exhaust heat recovery. The engine cooling water passing through absorbs the heat of the water jacket 20 and the exhaust heat of the exhaust gas,
The heat exchange passage 23a of the heat exchange cup 23 for hot water is discharged to the hot water for hot water supply for use. Further, the cooling / heating device 8 includes a plurality of indoor units 8a and an outdoor unit 8b, and the direction of the refrigerant compressed by the refrigerant compressor 7 is switched by the four-way valve 7a to perform cooling or heating by each indoor unit 8a.
【０００８】さらに、前記マフラ４の出口４ａに排気ガ
ス出口温度検出用温度センサ９を設けるとともに、この
温度センサ９に異常警報器１０を備えた運転制御装置１
１を連携させてある。そして、上記運転制御装置１１
は、上記温度センサ９が検出した排気ガス出口温度Ｔ１
により、次のように作動するように構成してあ。すなわ
ち、図２に示すように、上記温度センサ９が検出した排
気ガス出口温度Ｔ１が強制運転温度領域Ｔ０（例えば約
１５０℃乃至１７０℃）以下の場合には前記エンジン１
を通常運転する。そして、上記排気ガス出口温度Ｔ１が
上記強制運転温度領域Ｔ０内に達した場合には、例えば
前記冷暖房装置８の複数の室外機８ｂのうちの一台の冷
却ファン８ｃを停止させる事により、前記エンジン１を
強制的に疑似負荷運転させる。また、上記強制疑似負荷
運転により前記排気ガス出口温度Ｔ１が前記強制運転温
度領域Ｔ０以下に下がった場合には、前記エンジン１を
通常運転する。さらに、前記強制疑似負荷運転を設定繰
返し回数Ｎ（例えば５回）だけ繰り返しても前記排気ガ
ス出口温度Ｔ１が強制運転温度領域Ｔ０以下に下がらな
い場合には、前記異常警報器１０から異常警報を送出さ
せる。そして、上記排気ガス出口温度Ｔ１が強制運転温
度領域Ｔ０以上の場合には、前記エンジン１を運転停止
させる。Further, the operation control device 1 is provided with an exhaust gas outlet temperature detecting temperature sensor 9 at the outlet 4a of the muffler 4 and an abnormality alarm 10 provided at the temperature sensor 9.
1 is linked. Then, the operation control device 11
Is the exhaust gas outlet temperature T1 detected by the temperature sensor 9
, So that it is configured to operate as follows. That is, as shown in FIG. 2, when the exhaust gas outlet temperature T1 detected by the temperature sensor 9 is below the forced operating temperature region T0 (for example, about 150 ° C. to 170 ° C.), the engine 1
Drive normally. When the exhaust gas outlet temperature T1 reaches the forced operation temperature region T0, for example, by stopping one cooling fan 8c of the plurality of outdoor units 8b of the cooling and heating device 8, The engine 1 is forcibly operated under a pseudo load. Further, when the exhaust gas outlet temperature T1 falls below the forced operation temperature region T0 due to the forced pseudo load operation, the engine 1 is normally operated. Further, when the exhaust gas outlet temperature T1 does not fall below the forced operation temperature region T0 even after the forced pseudo load operation is repeated the set number of times N (for example, 5 times), the abnormality alarm device 10 gives an abnormality alarm. Send it out. Then, when the exhaust gas outlet temperature T1 is equal to or higher than the forced operating temperature region T0, the engine 1 is stopped.
【０００９】前記異常警報器１０から送出する異常警報
は、例えばブザーなどの音響的警報と同時に強制疑似負
荷運転回数または設定繰返し回数Ｎの残り回数を視覚的
に表示させて、排気熱回収用熱交換噐３の熱交換エレメ
ント３ａの目詰り状態が予知可能なようにする事ができ
る。The abnormality alarm sent from the abnormality alarm device 10 is, for example, an acoustic alarm such as a buzzer, and at the same time, the remaining number of the forced pseudo load operation number or the set number of repetitions N is visually displayed and the heat for exhaust heat recovery is displayed. The clogging state of the heat exchange element 3a of the exchange cup 3 can be predicted.
【図１】本発明実施例を示し、図１（Ａ）はエンジンの
排熱回収装置の概略構成図、図（Ｂ）は排気熱回収用熱
交換噐の要部断面図である。FIG. 1 shows an embodiment of the present invention, FIG. 1 (A) is a schematic configuration diagram of an exhaust heat recovery device of an engine, and FIG. 1 (B) is a sectional view of an essential part of an exhaust heat recovery heat exchanger.
【図２】本発明実施例を示し、図２（Ａ）は運転制御装
置の動作フローチャート、図２（Ｂ）は運転時間対排気
出口温度及び排圧の変化を示す図である。FIG. 2 shows an embodiment of the present invention, FIG. 2 (A) is an operation flowchart of the operation control device, and FIG. 2 (B) is a diagram showing changes in operating time versus exhaust outlet temperature and exhaust pressure.
【図３】従来例を示し、図１（Ａ）に相当する図であ
る。FIG. 3 shows a conventional example and is a diagram corresponding to FIG.
１…エンジン、２…排気ポート、３…排気熱回収用熱交
換噐、４…マフラ、４ａ…出口、５…フレキシブルホー
ス、６…排気管、７…冷媒圧縮機、８…冷暖房装置、９
…温度センサ、１０…異常警報器、１１…運転制御装
置、Ｎ…設定繰返し回数、Ｔ０…強制運転温度領域、Ｔ
１…排気ガス出口温度。DESCRIPTION OF SYMBOLS 1 ... Engine, 2 ... Exhaust port, 3 ... Exhaust heat recovery heat exchanger, 4 ... Muffler, 4a ... Outlet, 5 ... Flexible hose, 6 ... Exhaust pipe, 7 ... Refrigerant compressor, 8 ... Air conditioner, 9
... Temperature sensor, 10 ... Abnormality alarm, 11 ... Operation control device, N ... Set number of repetitions, T0 ... Forced operation temperature range, T
1 ... Exhaust gas outlet temperature.
───────────────────────────────────────────────────── フロントページの続き (51)Int.Cl.5 識別記号 庁内整理番号 ＦＩ 技術表示箇所 Ｆ２８Ｆ 27/00 Ｚ 9141−3Ｌ ─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. 5 Identification code Internal reference number FI technical display location F28F 27/00 Z 9141-3L
Claims (1)
熱回収用熱交換噐(３)を介してマフラ(４)・フレキシブ
ルホース(５)・排気管(６)を順に連通し、 上記エンジン(１)の排気ガスの排熱を上記排気熱回収用
熱交換噐(３)によりエンジン冷却水に回収利用するとと
もに、そのエンジン(１)で冷媒圧縮機(７)を駆動して冷
暖房装置(８)を作動させるように構成したエンジンヒー
トポンプの排気熱回収装置において、 前記マフラ(４)の出口(４ａ)に排気ガス出口温度検出用
温度センサ(９)を設けるとともに、この温度センサ(９)
に異常警報器(１０)を備えた運転制御装置(１１)を連携
させ、 上記運転制御装置(１１)は、上記温度センサ(９)が検出
した排気ガス出口温度(Ｔ１)が強制運転温度領域(Ｔ０)
以下の場合には、前記エンジン(１)を通常運転し、 上記排気ガス出口温度(Ｔ１)が強制運転温度領域(Ｔ０)
内に達した場合には、前記エンジン(１)を強制的に疑似
負荷運転させ、 上記強制疑似負荷運転により前記排気ガス出口温度(Ｔ
１)が強制運転温度領域(Ｔ０)以下に下がった場合に
は、前記エンジン(１)を通常運転し、 前記強制疑似負荷運転を設定繰返し回数(Ｎ)だけ繰り返
しても前記排気ガス出口温度(Ｔ１)が強制運転温度領域
(Ｔ０)以下に下がらない場合には、前記異常警報器(１
０)から異常警報を送出させ、 上記排気ガス出口温度(Ｔ１)が強制運転温度領域(Ｔ０)
以上の場合には、前記エンジン(１)を運転停止させるよ
うに構成したことを特徴とするエンジンの排気熱回収装
置の運転制御装置。1. A muffler (4), a flexible hose (5), and an exhaust pipe (6) are successively connected to an exhaust port (2) of an engine (1) through an exhaust heat recovery heat exchanger (3). The exhaust heat of the exhaust gas of the engine (1) is recovered and used as engine cooling water by the exhaust heat recovery heat exchanger (3), and the engine (1) drives the refrigerant compressor (7). In an exhaust heat recovery device for an engine heat pump configured to operate a cooling / heating device (8), an exhaust gas outlet temperature detecting temperature sensor (9) is provided at the outlet (4a) of the muffler (4), and this temperature sensor (9)
The operation control device (11) equipped with the abnormality alarm device (10) is linked to the operation control device (11), and the exhaust gas outlet temperature (T1) detected by the temperature sensor (9) is in the forced operation temperature range. (T0)
In the following cases, the engine (1) is normally operated, and the exhaust gas outlet temperature (T1) is in the forced operating temperature range (T0).
When the internal temperature is reached, the engine (1) is forcibly operated under a pseudo load, and the exhaust gas outlet temperature (T
When 1) falls below the forced operation temperature range (T0), the engine (1) is normally operated, and the exhaust gas outlet temperature ( T1) is the forced operating temperature range
If it does not drop below (T0), the above-mentioned abnormal alarm (1
0) an abnormal alarm is sent, and the exhaust gas outlet temperature (T1) is in the forced operating temperature range (T0).
In the above case, the operation control device for the exhaust heat recovery device of the engine is configured to stop the operation of the engine (1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5062697A JP2722161B2 (en) | 1993-02-26 | 1993-02-26 | Automatic removal device for adhering soot in the heat exchanger for exhaust heat recovery of the exhaust heat recovery device of the engine heat pump |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5062697A JP2722161B2 (en) | 1993-02-26 | 1993-02-26 | Automatic removal device for adhering soot in the heat exchanger for exhaust heat recovery of the exhaust heat recovery device of the engine heat pump |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06249010A true JPH06249010A (en) | 1994-09-06 |
| JP2722161B2 JP2722161B2 (en) | 1998-03-04 |
Family
ID=13207753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5062697A Expired - Fee Related JP2722161B2 (en) | 1993-02-26 | 1993-02-26 | Automatic removal device for adhering soot in the heat exchanger for exhaust heat recovery of the exhaust heat recovery device of the engine heat pump |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2722161B2 (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070050298A (en) * | 2005-11-10 | 2007-05-15 | 엘지전자 주식회사 | Cogeneration System and Control Method |
| JP2010013970A (en) * | 2008-07-02 | 2010-01-21 | Toyota Motor Corp | Abnormality determination device of exhaust heat recovery equipment |
| JP2010275933A (en) * | 2009-05-28 | 2010-12-09 | Aisin Seiki Co Ltd | Gas heat pump engine controller |
| JP2012184697A (en) * | 2011-03-04 | 2012-09-27 | Toyota Industries Corp | Exhaust heat recovery device for vehicle |
| US9404814B2 (en) | 2011-05-31 | 2016-08-02 | Kubota Corporation | Engine exhaust heat temperature detection device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6297239U (en) * | 1985-12-06 | 1987-06-20 | ||
| JPH01176726U (en) * | 1988-06-03 | 1989-12-18 |
-
1993
- 1993-02-26 JP JP5062697A patent/JP2722161B2/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6297239U (en) * | 1985-12-06 | 1987-06-20 | ||
| JPH01176726U (en) * | 1988-06-03 | 1989-12-18 |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20070050298A (en) * | 2005-11-10 | 2007-05-15 | 엘지전자 주식회사 | Cogeneration System and Control Method |
| JP2010013970A (en) * | 2008-07-02 | 2010-01-21 | Toyota Motor Corp | Abnormality determination device of exhaust heat recovery equipment |
| JP2010275933A (en) * | 2009-05-28 | 2010-12-09 | Aisin Seiki Co Ltd | Gas heat pump engine controller |
| JP2012184697A (en) * | 2011-03-04 | 2012-09-27 | Toyota Industries Corp | Exhaust heat recovery device for vehicle |
| US9404814B2 (en) | 2011-05-31 | 2016-08-02 | Kubota Corporation | Engine exhaust heat temperature detection device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2722161B2 (en) | 1998-03-04 |
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