JPH074777A - Engine waste heat recovery device - Google Patents

Engine waste heat recovery device

Info

Publication number
JPH074777A
JPH074777A JP5140870A JP14087093A JPH074777A JP H074777 A JPH074777 A JP H074777A JP 5140870 A JP5140870 A JP 5140870A JP 14087093 A JP14087093 A JP 14087093A JP H074777 A JPH074777 A JP H074777A
Authority
JP
Japan
Prior art keywords
cooling water
heat
engine
circuit
heat exchange
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
Application number
JP5140870A
Other languages
Japanese (ja)
Inventor
Takenori Sakamoto
武則 坂本
Original Assignee
Sanden Corp
サンデン株式会社
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Sanden Corp, サンデン株式会社 filed Critical Sanden Corp
Priority to JP5140870A priority Critical patent/JPH074777A/en
Publication of JPH074777A publication Critical patent/JPH074777A/en
Pending legal-status Critical Current

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • Y02A30/274Relating to heating, ventilation or air conditioning [HVAC] technologies using waste energy, e.g. from internal combustion engine

Abstract

PURPOSE:To simplify the system by a method wherein arm exhaust gas heat exchanger where heat exchange between engine exhaust gas and cooling water takes place is installed in a cooling water storage tank, and a cooling water heat exchanger is provided to perform heat exchange between cooling water and refrigerant or heating medium in a heat exchange circuit that is independent from a cooling water circuit. CONSTITUTION:A cooling water storage tank 2 is provided on the midway of a cooling water circuit through which cooling water circulates. An exhaust gas heat exchanger 10 is installed in the cooling water storage tank 2, where heat exchange between exhaust gas of an engine 1 and cooling water takes place. In addition, a cooling water heat exchanger 14 is installed in the cooling water storage tank 2, where heat exchange between cooling water and refrigerant or heating medium in a heat exchange circuit that is independent from a cooling water circuit takes place. Thereby, the system is remarkably simplified as a whole, resulting in a reduction in costs.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、家庭用及び業務用の冷
暖房システムに関し、更に詳しくは、エンジンや発電機
の排熱を回収して冷暖房システム等の熱源に利用するエ
ンジン排熱回収装置に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to domestic and commercial air-conditioning systems, and more particularly to an engine exhaust heat recovery device for recovering exhaust heat of an engine or a generator and using it as a heat source for an air-conditioning system or the like. .

【0002】[0002]

【従来の技術】近年、エンジンヒートポンプ式の冷暖房
システムの普及をみており、エンジンを駆動源として冷
媒回路の圧縮機に機械的仕事を行わせている。エンジン
には発生熱を冷却するための例えば冷却水による冷却回
路が備わっていて、エンジンの冷却仕事を終えて昇温し
た冷却水の熱は、ラジエータ等でもって放熱冷却して再
びエンジンに供給し、これを繰り返して循環させるよう
になっている。
2. Description of the Related Art In recent years, an engine heat pump type cooling and heating system has become widespread, and a compressor in a refrigerant circuit is caused to perform mechanical work by using an engine as a drive source. The engine is equipped with a cooling circuit for cooling the heat generated, for example, by cooling water, and the heat of the cooling water that has risen after the cooling work of the engine is radiated and cooled by a radiator etc. and supplied to the engine again. , This is repeated to circulate.

【0003】以前は昇温したエンジン冷却水の熱と共
に、排気ガスの熱も排熱されてなんら利用されることは
なかったが、最近ではこうした排熱を再利用することが
見直されてきている。つまり熱を回収して冷暖房や給湯
システムに有効利用することである。例えば、この種エ
ンジン熱回収利用システムとしては、本出願人によって
先に提案された特願平4−305374号公報のヒート
ポンプ空調システムがある。
In the past, the heat of the engine cooling water, which had risen in temperature, was exhausted with the heat of the exhaust gas and was not used at all, but recently, the exhaust heat has been reconsidered. . In other words, it is to recover the heat and use it effectively for air conditioning and hot water supply systems. For example, as this type of engine heat recovery utilization system, there is a heat pump air conditioning system of Japanese Patent Application No. 4-305374 previously proposed by the present applicant.

【0004】この公報に開示されたシステムの場合、ま
た一般的なエンジン駆動式ヒートポンプによる冷暖房給
湯システムにおいても同じく、その具体的なエンジン熱
回収構造は、冷暖房システムにおける暖房時を助成する
ために、1つは昇温した冷却水の熱を冷媒(熱媒)回路
に供給するための冷却水熱交換器と、2つは排気ガスの
熱を冷媒回路に供給するための排気ガス熱交換器と、こ
れら両熱交換器を冷媒回路に組み込んでいる。これによ
って冬季暖房時は、冷却水や排気ガスの熱を熱源として
回収し、この回収熱を冷媒回路における暖房の強化に利
用する。夏季シーズンは冷却水及び排気ガスの熱は共に
排熱される。
In the case of the system disclosed in this publication, as well as in a general engine-driven heat pump cooling / heating hot water supply system, the specific engine heat recovery structure is used to assist heating in the cooling / heating system. One is a cooling water heat exchanger for supplying the heat of the heated cooling water to the refrigerant (heating medium) circuit, and two is an exhaust gas heat exchanger for supplying the heat of the exhaust gas to the refrigerant circuit. Both of these heat exchangers are incorporated in the refrigerant circuit. As a result, during winter heating, heat of cooling water or exhaust gas is recovered as a heat source, and the recovered heat is used to enhance heating in the refrigerant circuit. During the summer season, the heat of the cooling water and the heat of the exhaust gas are both exhausted.

【0005】[0005]

【発明が解決しようとする課題】ところで、以上から明
らかなように、従来からのエンジン熱利用による空調シ
ステムにあっては、冷却水熱交換器と排気ガス熱交換器
の2つの熱交換器を冷媒回路に組み込むことから、シス
テム全体が非常に複雑となり、製造コストや組立工数等
が高騰してコスト高の原因となる他、維持経費などにも
問題点を残している。
By the way, as is apparent from the above, in the conventional air conditioning system utilizing the engine heat, two heat exchangers, a cooling water heat exchanger and an exhaust gas heat exchanger, are used. Since it is incorporated in the refrigerant circuit, the entire system becomes very complicated, and manufacturing costs and assembly man-hours increase, which causes high costs, and there are problems in maintenance costs.

【0006】したがって、本発明の目的は、システムを
簡素化する共に、コストや経費の低減を可能にしたエン
ジン排熱回収装置を提供することにある。
Therefore, an object of the present invention is to provide an engine exhaust heat recovery device which simplifies the system and enables cost and cost reduction.

【0007】[0007]

【課題を解決するための手段】この目的を達成するため
に、本発明によるエンジン排熱回収装置は、請求項1で
は、エンジン冷却水が循環する冷却水回路の途中に、冷
却水を貯留する水槽を設け、水槽内に、エンジン排気ガ
スの排熱と冷却水との間で熱交換を行う排気ガス熱交換
部を設け、さらに水槽内に冷却水及び冷却水回路から独
立した熱交換回路中の冷媒または熱媒との間で熱交換を
行う冷却水熱交換部を設けている。
In order to achieve this object, an engine exhaust heat recovery apparatus according to the present invention, in claim 1, stores cooling water in the middle of a cooling water circuit in which engine cooling water circulates. A water tank is provided, and an exhaust gas heat exchange section that exchanges heat between the exhaust heat of the engine exhaust gas and cooling water is provided in the water tank, and a heat exchange circuit independent of the cooling water and cooling water circuits is provided in the water tank. There is provided a cooling water heat exchange section for exchanging heat with the refrigerant or the heat medium.

【0008】請求項2では、冷却水熱交換部を熱交換回
路に接続し、冷却水熱交換部の入口側に開閉弁を設け、
熱交換回路中の冷媒または熱媒との間で熱交換が必要な
ときに開閉弁を開けるようになっている。
In the second aspect, the cooling water heat exchange section is connected to the heat exchange circuit, and an opening / closing valve is provided on the inlet side of the cooling water heat exchange section.
The on-off valve is opened when heat exchange with the refrigerant or heat medium in the heat exchange circuit is required.

【0009】また、請求項3では、冷却水回路中の水槽
の出口側とエンジン入口側との間に放熱器を設け、放熱
器を迂回するバイパス管を冷却水回路中に設けると共
に、バイパス管の入口部及び出口部にそれぞれ切換弁を
設けることができる。
Further, according to the present invention, a radiator is provided between the outlet side of the water tank and the engine inlet side in the cooling water circuit, a bypass pipe bypassing the radiator is provided in the cooling water circuit, and the bypass pipe is provided. A switching valve can be provided at each of the inlet portion and the outlet portion of the.

【0010】[0010]

【作用】請求項1にあっては、エンジン冷却水回路に設
けられた水槽の内部に、冷却水熱交換部と排気ガス熱交
換部を配置した構成であるから、水槽では従前からの冷
却水熱交換器及び排気ガス熱交換器の両機能を備えるこ
とになり、装置全体が簡略化される。水槽では、エンジ
ンを通ってきた冷却水の熱に、排気ガス熱交換部におけ
る排気ガスの熱が加わり、冷却水熱交換部を通る冷媒が
加温され、暖房が助成される。
According to the first aspect of the present invention, the cooling water heat exchange section and the exhaust gas heat exchange section are arranged inside the water tank provided in the engine cooling water circuit. Since both functions of the heat exchanger and the exhaust gas heat exchanger are provided, the entire apparatus is simplified. In the water tank, the heat of the exhaust gas in the exhaust gas heat exchange section is added to the heat of the cooling water that has passed through the engine, the refrigerant passing through the heat exchange section for the cooling water is heated, and heating is assisted.

【0011】請求項2及び3にあっては、開閉弁は、例
えば冷媒回路のごとき熱交換回路にあっては、暖房する
時期は開いて冷媒回路の冷媒を冷却水熱交換部に導入す
る。この暖房時期はバイパス管が開放されているので、
水槽からの冷却水は放熱器を迂回してエンジンに向か
う。
In the second and third aspects, the opening / closing valve is opened in a heat exchange circuit such as a refrigerant circuit during heating to introduce the refrigerant in the refrigerant circuit into the cooling water heat exchange section. Since the bypass pipe is open during this heating period,
The cooling water from the water tank bypasses the radiator and goes to the engine.

【0012】暖房時期以外の夏期にあっては、開閉弁は
閉じ、冷媒回路の冷媒は冷却水熱交換部に導入されな
い。また、バイパス管は閉塞されているから、水槽から
の冷却水は通常どおり放熱器を通って放熱され、冷却さ
れた冷却水はエンジンに送られる。
In the summer other than the heating period, the on-off valve is closed and the refrigerant in the refrigerant circuit is not introduced into the cooling water heat exchange section. Further, since the bypass pipe is closed, the cooling water from the water tank is radiated as usual through the radiator, and the cooled cooling water is sent to the engine.

【0013】即ち、夏期シーズンにあっては、冷媒回路
の冷媒は水槽に向かって導入されないから、排気ガスの
熱は冷媒の加温に活かす必要がなく、水槽内の排気ガス
熱交換部を通って大気放出により排熱される。また、水
槽内の冷却水熱交換部を通る冷却水の熱も冷媒の加温に
活かす必要がなく、放熱器で放熱により排熱されること
になる。
That is, in the summer season, since the refrigerant in the refrigerant circuit is not introduced into the water tank, it is not necessary to utilize the heat of the exhaust gas to heat the refrigerant, and the heat of the exhaust gas passes through the exhaust gas heat exchange section in the water tank. It is then exhausted to the atmosphere and exhausted. Further, it is not necessary to utilize the heat of the cooling water passing through the cooling water heat exchange section in the water tank for heating the refrigerant, and the heat is exhausted by the radiator to radiate heat.

【0014】[0014]

【実施例】以下、本発明によるエンジン排熱回収装置の
実施例を図面に基づいて説明する。
Embodiments of an engine exhaust heat recovery system according to the present invention will be described below with reference to the drawings.

【0015】図1は、改良された実施例のエンジン冷却
水系の回路と、このエンジン冷却水回路に接続された適
用例としての受熱側ヒートポンプ冷暖房システムを示
す。受熱側システムに適用されたヒートポンプ冷暖房シ
ステムとしては公知技術のものと考えてよく、したがっ
てこれに限定されることなく、回収されたエンジン熱を
利用できるシステムであれば例えば給湯装置などへの採
用も可能である。
FIG. 1 shows an engine cooling water system circuit of an improved embodiment, and a heat receiving side heat pump cooling / heating system as an application example connected to the engine cooling water circuit. It may be considered that the heat pump cooling and heating system applied to the heat receiving side system is a known technique, and therefore, the present invention is not limited to this, and if it is a system that can utilize the recovered engine heat, it may be adopted in, for example, a water heater. It is possible.

【0016】エンジン駆動ヒートポンプ式冷暖房システ
ムは、本発明でいう熱交換回路である冷媒回路の圧縮機
の機械的仕事をエンジン1で行うもので、このエンジン
1とエンジン冷却水系を含む室外ユニットと、冷気暖気
を室内に吹き出す冷暖房機器の室内ユニットとの間で冷
暖房回路を形成している。
The engine-driven heat pump type cooling and heating system performs the mechanical work of the compressor of the refrigerant circuit which is the heat exchange circuit in the present invention by the engine 1. The engine 1 and the outdoor unit including the engine cooling water system, An air conditioning circuit is formed with an indoor unit of the air conditioning equipment that blows cold air into the room.

【0017】屋外設置の室外ユニットは、実施例のエン
ジン冷却水回路Aと、ヒートポンプ式冷暖房システムB
における冷媒回路の一部機器から構成されている。エン
ジン冷却水回路Aには、本発明の骨子ともいうべきエン
ジン冷却水を貯留する水槽2が設けられ、ここからの冷
却水を循環させてエンジン1を冷却するようになってい
る。エンジン1と水槽2との間は、往き管3及び戻し管
4による冷却水管で接続されて冷却水の循環閉塞回路を
形成している。水槽2とエンジン1を接続する往き管3
には、冷却水と空気との間で熱交換を行う、つまり放熱
器として冷却水の熱を大気放出して冷却するラジエータ
5が設けられている。ラジエータ5にはモータファン6
が備わっている。エンジン1で冷却仕事を終え、エンジ
ン発生熱で昇温した冷却水は戻し管4から水槽2に戻さ
れるようになっている。
The outdoor unit installed outdoors is an engine cooling water circuit A of the embodiment and a heat pump type cooling and heating system B.
It is composed of a part of the device of the refrigerant circuit. The engine cooling water circuit A is provided with a water tank 2 for storing the engine cooling water, which is also the gist of the present invention, and circulates the cooling water from this tank to cool the engine 1. The engine 1 and the water tank 2 are connected to each other by a cooling water pipe including a forward pipe 3 and a return pipe 4 to form a circulation water blocking circuit. Forward pipe 3 that connects the water tank 2 and the engine 1
Is provided with a radiator 5 for exchanging heat between the cooling water and the air, that is, as a radiator for discharging the heat of the cooling water to the atmosphere to cool it. Motor fan 6 for radiator 5
Is equipped with. Cooling water that has finished the cooling work in the engine 1 and has been heated by the heat generated by the engine is returned from the return pipe 4 to the water tank 2.

【0018】また、冷却水の往き管3には、ラジエータ
5を迂回し往き管3から分岐したバイパス管7が設けら
れている。バイパス管7の分岐する入口側と出口側に
は、それぞれ電磁式切換弁の第1三方弁8と第2三方弁
9が配置され、冷却水の流れを弁作動によって本来の往
き管3かまたはバイパス管7のいずれかに切り換えるこ
とが可能である。
A bypass pipe 7 that bypasses the radiator 5 and branches from the forward pipe 3 is provided in the forward pipe 3 of the cooling water. A first three-way valve 8 and a second three-way valve 9 of an electromagnetic switching valve are respectively arranged on the inlet side and the outlet side where the bypass pipe 7 branches, and the flow of the cooling water is supplied to the original forward pipe 3 or It is possible to switch to any of the bypass pipes 7.

【0019】また、水槽2の内部には、本発明の要旨で
ある排気ガスと冷却水との間で熱交換を行う熱交換器
(以下、これを排気ガス熱交換部と呼ぶ)10が設けら
れている。平易に言い換えれば、排気ガス熱交換部10
は排気ガスの熱を水槽2内に導入し、内部の冷却水をガ
ス熱で加温して温度上昇させるための機器である。冷却
水を加温するということは一見逆説的であるが、それは
昇温した冷却水の熱によって次に述べるヒートポンプ式
冷暖房システムBにおける暖房助成という意味から明ら
かになろう。
Inside the water tank 2, a heat exchanger (hereinafter referred to as an exhaust gas heat exchange section) 10 for exchanging heat between the exhaust gas and the cooling water, which is the gist of the present invention, is provided. Has been. In other words, in other words, the exhaust gas heat exchange section 10
Is a device for introducing the heat of the exhaust gas into the water tank 2 and heating the internal cooling water with the gas heat to raise the temperature. Although heating the cooling water is paradoxical at first glance, it will be apparent from the meaning of heating assistance in the heat pump type cooling / heating system B described below by the heat of the heated cooling water.

【0020】排気ガス熱交換部10は、スパイラル形状
に成形されたコイル部11を有し、このコイル部11を
水槽2内で冷却水中に浸漬させて配置している。コイル
部11の入口側延長基端はエンジン1の排気ガス出口1
2に接続され、出口側から延長した先端は大気開放口1
3となっている。
The exhaust gas heat exchange portion 10 has a coil portion 11 formed in a spiral shape, and the coil portion 11 is arranged in the water tank 2 by being immersed in cooling water. The extension base end on the inlet side of the coil portion 11 is the exhaust gas outlet 1 of the engine 1.
2 is connected to 2 and the tip extended from the outlet side is the atmospheric opening 1
It is 3.

【0021】以上のエンジン冷却水回路Aの他に、室外
ユニットを構成するヒートポンプ式冷暖房システムB側
の冷媒回路は、エンジン1からの回転出力で作動する冷
媒圧縮機20、室外熱交換器21を主にして構成されて
いる。冷媒としてはフロン等が用いられ、ブライン、水
等の熱媒用として作用させることが可能である。
In addition to the engine cooling water circuit A described above, the refrigerant circuit on the heat pump type cooling and heating system B side constituting the outdoor unit includes a refrigerant compressor 20 and an outdoor heat exchanger 21 which are operated by the rotational output from the engine 1. It is mainly composed. Freon or the like is used as the refrigerant, and it can be used as a heat medium for brine, water, or the like.

【0022】これら各機器と共に冷媒回路を構成し、本
発明の要旨である冷媒と冷却水との間で熱交換を行う熱
交換器(以下、これを冷却水熱交換部と呼ぶ)14が、
前述の水槽2内で冷却水中に浸漬し排気ガス熱交換部1
0と対向位置に設けられている。この冷却水熱交換部1
4もまたスパイラル形状に成形されたコイル部15を有
し、コイル部15中を通る冷媒が水槽2内で昇温冷却水
の熱を受けることが可能となっている。コイル部15は
冷媒回路に接続され、冷媒回路からコイル部15に入る
入口側には電磁弁式の開閉弁16が設けられている。こ
の開閉弁16は夏季シーズンは回路をオフ(閉)に、冬
季シーズンは回路をオン(開)にするよう設定され、コ
イル部15に冷媒回路からの冷媒の導入を規制できるよ
うになっている。コイル部15から冷媒回路に向かう出
口側には逆止弁17を設けている。
A heat exchanger (hereinafter referred to as "cooling water heat exchange section") 14 which constitutes a refrigerant circuit together with each of these devices and performs heat exchange between the refrigerant and cooling water, which is the gist of the present invention,
Exhaust gas heat exchange section 1 immersed in cooling water in the aforementioned water tank 2
It is provided at a position facing 0. This cooling water heat exchange section 1
4 also has a coil portion 15 formed in a spiral shape, and the refrigerant passing through the coil portion 15 can receive the heat of the temperature-raising cooling water in the water tank 2. The coil portion 15 is connected to the refrigerant circuit, and a solenoid valve-type on-off valve 16 is provided on the inlet side of the coil portion 15 that enters the refrigerant circuit. The on-off valve 16 is set to turn off (close) the circuit in the summer season and turn on (open) the circuit in the winter season, so that the introduction of the refrigerant from the refrigerant circuit into the coil portion 15 can be regulated. . A check valve 17 is provided on the outlet side from the coil portion 15 toward the refrigerant circuit.

【0023】また一方、ヒートポンプ式冷暖房システム
B側の冷媒回路を構成する室内ユニットは、膨張弁2
2、冷房時は蒸発器に暖房時は凝縮器となる室内熱交換
器23、及び逆止弁24等からなっている。即ち、室内
ユニットにおいては、室内熱交換器23を通して室内フ
ァンモータ24から冷気または暖気を放出して、室内を
冷暖房するようになっていて、室内熱交換器23は冷房
運転時は蒸発器として、暖房運転時は凝縮器として作動
することになる。
On the other hand, the indoor unit forming the refrigerant circuit on the heat pump type cooling and heating system B side is the expansion valve 2
2. An indoor heat exchanger 23, which serves as an evaporator during cooling and a condenser during heating, and a check valve 24 and the like. That is, in the indoor unit, cold air or warm air is discharged from the indoor fan motor 24 through the indoor heat exchanger 23 to cool and heat the room, and the indoor heat exchanger 23 serves as an evaporator during cooling operation. It will operate as a condenser during heating operation.

【0024】このように、水槽2内に設けられた冷却水
熱交換部14は、冷媒回路の各機器に接続され、室外ユ
ニット側の室外熱交換器21と室内ユニット側の室内熱
交換器23との間でヒートポンプ方式による冷暖房シス
テムが形成される。また、冷媒回路においては、冷媒の
流れを室外熱交換器21及び室内熱交換器23間で切り
換え、かつ水槽2側の冷却水熱交換部14に冷媒の供給
を可能に切り換える第3三方弁25が設けてある。
As described above, the cooling water heat exchange section 14 provided in the water tank 2 is connected to each device of the refrigerant circuit, and the outdoor unit side outdoor heat exchanger 21 and the indoor unit side indoor heat exchanger 23 are connected. A cooling / heating system by a heat pump system is formed between and. Further, in the refrigerant circuit, the third three-way valve 25 that switches the flow of the refrigerant between the outdoor heat exchanger 21 and the indoor heat exchanger 23 and switches the supply of the refrigerant to the cooling water heat exchange section 14 on the water tank 2 side. Is provided.

【0025】次に、以上の構成による実施例のエンジン
排熱回収装置の作用を説明する。
Next, the operation of the engine exhaust heat recovery system of the embodiment having the above construction will be described.

【0026】夏期シーズン中の冷房時の場合、開閉弁1
6は閉状態にセットされ、水槽2内の冷却水熱交換部1
4では冷媒の流通はない。
On-off valve 1 for cooling during the summer season
6 is set to a closed state, and the cooling water heat exchange section 1 in the water tank 2
In No. 4, there is no circulation of the refrigerant.

【0027】また、この冷房時のエンジン冷却水回路A
では、第1三方弁8及び第2三方弁9の切り換えによっ
てバイパス回路7は閉じられており、冷却水管の往き管
3と戻し管4による通常の冷却水循環回路が成立してい
る。即ち、水槽2から往き管3を通して流出した冷却水
(図中太矢印)はラジエータ5を通過中に放熱作用によ
り冷却され、それからエンジン1に導入されてエンジン
発生熱を冷却する。エンジン1を通過中に冷却水は発生
熱でもって温度上昇し、この加温された冷却水は戻し管
4から水槽2に戻される。そしてまた往き管3からラジ
エータ5に入って冷却され、エンジン1へとこの循環を
繰り返す。
Further, the engine cooling water circuit A during this cooling
Then, the bypass circuit 7 is closed by switching the first three-way valve 8 and the second three-way valve 9, and a normal cooling water circulation circuit by the forward pipe 3 and the return pipe 4 of the cooling water pipe is established. That is, the cooling water (thick arrow in the figure) flowing out from the water tank 2 through the outflow pipe 3 is cooled by the heat radiation effect while passing through the radiator 5, and then introduced into the engine 1 to cool the heat generated by the engine. While passing through the engine 1, the temperature of the cooling water rises due to the generated heat, and the heated cooling water is returned from the return pipe 4 to the water tank 2. Then, the radiator 5 again enters the radiator 5 to be cooled, and this circulation is repeated to the engine 1.

【0028】この間、エンジン1からの排気ガス(図中
破線矢印)は水槽2内の排気ガス熱交換部10に導入さ
れ、排気ガスの熱で水槽2内の冷却水を加温する。その
後は大気開放口13から排出される。
During this time, the exhaust gas from the engine 1 (indicated by the broken line arrow in the figure) is introduced into the exhaust gas heat exchange section 10 in the water tank 2, and the heat of the exhaust gas heats the cooling water in the water tank 2. After that, the gas is discharged from the atmosphere opening port 13.

【0029】夏期シーズンとか冷房中は、排気ガスの熱
で冷却水を加温してはいるが、このこと自体冷媒回路に
利用する意味ではなく、また利用する必要がないという
ことである。その意味では冷却水の熱の場合も同様であ
る。
Although the cooling water is heated by the heat of the exhaust gas during the summer season or during cooling, this does not mean that the cooling water is used for the refrigerant circuit itself, and it is not necessary to use it. In that sense, the same applies to the case of heat of cooling water.

【0030】ちなみに、冷房運転時は、エンジン1の回
転出力は冷媒圧縮機20に伝達され、冷媒圧縮機20の
仕事により冷媒が圧縮されて図中の太い破線矢印の方向
に吐出される。圧縮により高温、高圧となった冷媒は四
方弁25を通り、室外熱交換器21が「凝縮器」として
作動することにより、外気との接触で冷却され液化す
る。液化した冷媒液は膨張弁22によって減圧される。
By the way, during the cooling operation, the rotational output of the engine 1 is transmitted to the refrigerant compressor 20, the work of the refrigerant compressor 20 compresses the refrigerant, and the refrigerant is discharged in the direction of the thick broken arrow in the figure. The high-temperature and high-pressure refrigerant due to compression passes through the four-way valve 25, and the outdoor heat exchanger 21 operates as a "condenser" to be cooled and liquefied by contact with the outside air. The liquefied refrigerant liquid is decompressed by the expansion valve 22.

【0031】この低圧の冷媒液は次いで室内ユニットに
導入され、室内ユニットの室内熱交換器23が「蒸発
器」として作動して、室内空気から熱を奪って蒸発す
る。このときの蒸発熱により冷房効果を生じる。蒸発し
た冷媒ガスは再び冷媒圧縮機20に戻り、同様な冷凍サ
イクルを繰り返す。
This low-pressure refrigerant liquid is then introduced into the indoor unit, and the indoor heat exchanger 23 of the indoor unit operates as an "evaporator" to remove heat from the indoor air and evaporate it. The heat of evaporation at this time produces a cooling effect. The evaporated refrigerant gas returns to the refrigerant compressor 20 again, and the same refrigeration cycle is repeated.

【0032】一方、冬期シーズン中の暖房時は、開閉弁
16はオン信号で開かれ、これに同期して第1三方弁8
及び第2三方弁9にも切換信号が送られてバイパス回路
7を開放する。即ち、水槽2から出た冷却水はラジエー
タ5を通らないで迂回し、バイパス回路7から直接エン
ジン1に導入される。エンジン1を通過中に冷却水はエ
ンジン発生熱により温度上昇し、加温された状態で戻し
管4から水槽2内に戻される。また同時に、エンジン1
からの排気ガスも水槽2内の排気ガス熱交換部10に導
入される。したがって、水槽2では、エンジン1から温
度上昇して戻った冷却水が導入され、この温かい冷却水
を更に排気ガスの熱で加温することになる。
On the other hand, during heating during the winter season, the on-off valve 16 is opened by an ON signal, and in synchronization with this, the first three-way valve 8
A switching signal is also sent to the second three-way valve 9 to open the bypass circuit 7. That is, the cooling water discharged from the water tank 2 is bypassed without passing through the radiator 5 and directly introduced into the engine 1 from the bypass circuit 7. While passing through the engine 1, the temperature of the cooling water rises due to the heat generated by the engine and is returned to the water tank 2 from the return pipe 4 in a heated state. At the same time, engine 1
The exhaust gas from is also introduced into the exhaust gas heat exchange section 10 in the water tank 2. Therefore, in the water tank 2, the cooling water whose temperature has risen and returned from the engine 1 is introduced, and this warm cooling water is further heated by the heat of the exhaust gas.

【0033】また、水槽2内では、前述のように加温さ
れた冷却水に、冷却水熱交換部14を介して冷媒回路の
冷媒(図中実線矢印)が接触することになる。即ち、ヒ
ートポンプ式冷暖房システムBの冷媒回路から冷媒が冷
却水回路Aに送られ、水槽2内で加温されている冷却水
と冷媒との間で熱交換が行われ、冷媒は冷却水熱交換部
14のコイル部15を通過中に加温される。
Further, in the water tank 2, the cooling water heated as described above comes into contact with the refrigerant (solid line arrow in the figure) in the refrigerant circuit via the cooling water heat exchange section 14. That is, the refrigerant is sent from the refrigerant circuit of the heat pump type cooling and heating system B to the cooling water circuit A, and heat is exchanged between the cooling water heated in the water tank 2 and the refrigerant. It is heated while passing through the coil portion 15 of the portion 14.

【0034】このようにエンジン冷却水によって加温さ
れた冷媒は、エンジン冷却水から熱を奪って吸熱する熱
源となる。
The refrigerant heated by the engine cooling water in this way becomes a heat source that absorbs heat by absorbing heat from the engine cooling water.

【0035】暖房運転時の作用は次の通りである。冷媒
圧縮機20の運転により冷媒が圧縮される。圧縮により
高温、高圧となった冷媒は室内ユニット側の室内熱交換
器23に導入され、室内熱交換器23が「凝縮器」とし
て作動し、冷媒は室内空気によって冷却されて液化す
る。このとき室内空気は凝縮熱によって暖められ、暖房
効果を生じる。液化した冷媒は膨張弁22で減圧され
る。この減圧された冷媒液は室外ユニットの室外熱交換
器21でここを「蒸発器」として外気の熱を奪って蒸発
する。さらに、水槽2内の冷却水熱交換部14により冷
却水の熱を奪って吸熱する。
The operation during the heating operation is as follows. The refrigerant is compressed by the operation of the refrigerant compressor 20. The high temperature and high pressure refrigerant due to compression is introduced into the indoor heat exchanger 23 on the indoor unit side, the indoor heat exchanger 23 operates as a "condenser", and the refrigerant is liquefied by being cooled by the indoor air. At this time, the indoor air is warmed by the heat of condensation to produce a heating effect. The liquefied refrigerant is decompressed by the expansion valve 22. The depressurized refrigerant liquid is taken as the "evaporator" by the outdoor heat exchanger 21 of the outdoor unit to remove the heat of the outside air and evaporate. Further, the heat of the cooling water is absorbed by the cooling water heat exchange section 14 in the water tank 2.

【0036】なお、図2は、本発明の他の実施例とし
て、エンジン排熱回収装置を給湯装置に利用した一例を
示している。
FIG. 2 shows, as another embodiment of the present invention, an example in which the engine exhaust heat recovery device is used as a hot water supply device.

【0037】[0037]

【発明の効果】以上説明したように、本発明によるエン
ジン排熱回収装置は、エンジン冷却水回路に冷却水の槽
を設け、この水槽内を冷却水熱交換器及び排気ガス熱交
換器の2つの熱交換器の機能を果たすよう構成したこと
で、システム全体の構造が非常に簡素になり、従来のよ
うにエンジン冷却水の熱と排気ガスの熱を回収して、例
えばエンジンヒートポンプ式冷暖房システム等の熱交換
回路に供給して暖房を助成する際、冷却水熱交換器と排
気ガス熱交換器を独自に冷房回路に組み込むことでシス
テム全体が非常に複雑になり、製造コストや組立工数等
の高騰や維持経費などの問題点を解決できる利点があ
る。
As described above, the engine exhaust heat recovery apparatus according to the present invention is provided with the cooling water tank in the engine cooling water circuit, and the inside of this water tank is the cooling water heat exchanger and the exhaust gas heat exchanger. Since it is configured to perform the functions of two heat exchangers, the structure of the entire system is greatly simplified, and the heat of the engine cooling water and the heat of the exhaust gas can be recovered as in the past, and, for example, an engine heat pump cooling and heating system. , Etc., to subsidize the heating by supplying it to the heat exchange circuit, etc., the cooling water heat exchanger and the exhaust gas heat exchanger are independently incorporated into the cooling circuit, which makes the entire system very complicated, and the manufacturing cost and assembly man-hours, etc. There is an advantage that problems such as soaring prices and maintenance costs can be solved.

【図面の簡単な説明】[Brief description of drawings]

【図1】本発明による実施例のエンジン排熱回収装置を
ヒートポンプ式冷暖房システムに利用した例の構成図
FIG. 1 is a configuration diagram of an example in which an engine exhaust heat recovery device according to an embodiment of the present invention is used in a heat pump type cooling and heating system.

【図2】本発明による実施例のエンジン排熱回収装置を
給湯装置に利用した例の構成図
FIG. 2 is a configuration diagram of an example in which the engine exhaust heat recovery device according to the embodiment of the present invention is used for a hot water supply device.

【符号の説明】[Explanation of symbols]

1…エンジン、2…水槽、3…冷却水管の往き管、4…
冷却水管の戻し管、5…ラジエータ、7…バイパス管、
8、9…三方弁、10…排気ガス熱交換部、14…冷却
水熱交換部、16…開閉弁、20…冷媒圧縮機、21…
室外熱交換器、22…膨張弁、23…室内熱交換器
1 ... Engine, 2 ... Water tank, 3 ...
Return pipe for cooling water pipe, 5 ... Radiator, 7 ... Bypass pipe,
8, 9 ... Three-way valve, 10 ... Exhaust gas heat exchange section, 14 ... Cooling water heat exchange section, 16 ... Open / close valve, 20 ... Refrigerant compressor, 21 ...
Outdoor heat exchanger, 22 ... Expansion valve, 23 ... Indoor heat exchanger

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 エンジン冷却水が循環する冷却水回路の
途中に、冷却水を貯留する水槽を設け、 水槽内に、エンジン排気ガスの排熱と冷却水との間で熱
交換を行う排気ガス熱交換部を設け、 さらに水槽内に、冷却水及び冷却水回路から独立した熱
交換回路中の冷媒または熱媒との間で熱交換を行う冷却
水熱交換部を設け、 たことを特徴とするエンジン排熱回収装置。
1. A water tank for storing cooling water is provided in the middle of a cooling water circuit in which engine cooling water circulates, and exhaust gas for exchanging heat between engine exhaust gas exhaust heat and cooling water is provided in the water tank. A heat exchange section is further provided, and a cooling water heat exchange section for exchanging heat with the refrigerant or the heat medium in the heat exchange circuit independent of the cooling water and the cooling water circuit is further provided in the water tank. Engine exhaust heat recovery device.
【請求項2】 冷却水熱交換部を熱交換回路に接続し、
冷却水熱交換部の入口側に開閉弁を設け、熱交換回路中
の冷媒または熱媒との間で熱交換が必要なときに開閉弁
を開ける請求項1記載のエンジン排熱回収装置。
2. The cooling water heat exchange section is connected to a heat exchange circuit,
The engine exhaust heat recovery device according to claim 1, wherein an opening / closing valve is provided on the inlet side of the cooling water heat exchange section, and the opening / closing valve is opened when heat exchange with the refrigerant or heat medium in the heat exchange circuit is required.
【請求項3】 冷却水回路中の水槽の出口側とエンジン
入口側との間に放熱器を設け、放熱器を迂回するバイパ
ス管を冷却水回路中に設けると共に、バイパス管の入口
部及び出口部にそれぞれ切換弁を設けた請求項1または
2記載のエンジン排熱回収装置。
3. A radiator is provided between the outlet side of the water tank in the cooling water circuit and the engine inlet side, a bypass pipe bypassing the radiator is provided in the cooling water circuit, and an inlet portion and an outlet of the bypass pipe are provided. The engine exhaust heat recovery device according to claim 1 or 2, wherein each part is provided with a switching valve.
JP5140870A 1993-06-11 1993-06-11 Engine waste heat recovery device Pending JPH074777A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP5140870A JPH074777A (en) 1993-06-11 1993-06-11 Engine waste heat recovery device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP5140870A JPH074777A (en) 1993-06-11 1993-06-11 Engine waste heat recovery device

Publications (1)

Publication Number Publication Date
JPH074777A true JPH074777A (en) 1995-01-10

Family

ID=15278673

Family Applications (1)

Application Number Title Priority Date Filing Date
JP5140870A Pending JPH074777A (en) 1993-06-11 1993-06-11 Engine waste heat recovery device

Country Status (1)

Country Link
JP (1) JPH074777A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002228294A (en) * 2001-01-30 2002-08-14 Sanyo Electric Co Ltd Method and device for cooling engine and refrigerating device
US6543531B1 (en) 1998-03-27 2003-04-08 Daimlerchrysler Ag Device and method for heating and cooling a compartment of a motor vehicle
JP2010007957A (en) * 2008-06-26 2010-01-14 Orion Mach Co Ltd Temperature controller
WO2010044516A1 (en) * 2008-10-13 2010-04-22 한국공조기술개발(주) Dehumidification system for a vehicle
JP2011106798A (en) * 2009-11-13 2011-06-02 Isao Yamashita Exhaust cooling generator
CN103587379A (en) * 2012-08-13 2014-02-19 江苏卡威专用汽车制造有限公司 Connection part for tail gas bottom plate heating device of mining dumper
CN104175838A (en) * 2013-05-27 2014-12-03 余向东 Engine exhaust heat recovery and supply interior heating system and heat recovery method thereof

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US6543531B1 (en) 1998-03-27 2003-04-08 Daimlerchrysler Ag Device and method for heating and cooling a compartment of a motor vehicle
JP2002228294A (en) * 2001-01-30 2002-08-14 Sanyo Electric Co Ltd Method and device for cooling engine and refrigerating device
JP2010007957A (en) * 2008-06-26 2010-01-14 Orion Mach Co Ltd Temperature controller
WO2010044516A1 (en) * 2008-10-13 2010-04-22 한국공조기술개발(주) Dehumidification system for a vehicle
JP2011106798A (en) * 2009-11-13 2011-06-02 Isao Yamashita Exhaust cooling generator
CN103587379A (en) * 2012-08-13 2014-02-19 江苏卡威专用汽车制造有限公司 Connection part for tail gas bottom plate heating device of mining dumper
CN104175838A (en) * 2013-05-27 2014-12-03 余向东 Engine exhaust heat recovery and supply interior heating system and heat recovery method thereof

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