JP2010111168A - Exhaust heat collecting system for vehicle - Google Patents

Exhaust heat collecting system for vehicle Download PDF

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JP2010111168A
JP2010111168A JP2008283346A JP2008283346A JP2010111168A JP 2010111168 A JP2010111168 A JP 2010111168A JP 2008283346 A JP2008283346 A JP 2008283346A JP 2008283346 A JP2008283346 A JP 2008283346A JP 2010111168 A JP2010111168 A JP 2010111168A
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air
battery
heat
vehicle
exhaust
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JP5210803B2 (en
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Hiroki Yoshioka
宏起 吉岡
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Marelli Corp
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Calsonic Kansei Corp
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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60H—ARRANGEMENTS OF HEATING, COOLING, VENTILATING OR OTHER AIR-TREATING DEVICES SPECIALLY ADAPTED FOR PASSENGER OR GOODS SPACES OF VEHICLES
    • B60H1/00—Heating, cooling or ventilating [HVAC] devices
    • B60H1/02—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant
    • B60H1/03—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant
    • B60H1/039—Heating, cooling or ventilating [HVAC] devices the heat being derived from the propulsion plant and from a source other than the propulsion plant from air leaving the interior of the vehicle, i.e. heat recovery

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • Air-Conditioning For Vehicles (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To provide an exhaust heat collecting system for a vehicle capable of using effectively the heat of a battery exhaust wind. <P>SOLUTION: The exhaust heat collecting system for a vehicle is equipped with an exhaust heat collecting cycle 13 having a heat exchanger for heat recovery 32 to absorb the heat of the battery exhaust wind having passed a bettery 10 and a heat exchanger for reduction 33 to radiate the heat collected by the recovery heat exchanger 32 and with a first 11 and a second switching door 12 to lead to outside the cabin either of the two selectively, i.e. the internal air of the cabin and the battery exhaust wind having passed the battery 10, whereby the heat of the internal air or the battery exhaust wind selected by the switching doors 11 and 12 is absorbed by the heat exchanger 32. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

本発明は、車外に排気する送風からの熱を回収する車両用排気熱回収システムに関する。   The present invention relates to a vehicle exhaust heat recovery system that recovers heat from air blown out of a vehicle.

例えば電気自動車やハイブリッド車には、走行駆動用のバッテリが搭載される。このバッテリは、走行時の充放電によって発熱し、この充放電を繰り返すことにより高温になる。バッテリ（リチウムイオンバッテリなど）は、一般的に所定以上の高温になると劣化や極間を形成する部材の剥離、不純物の析出などが生じ、結果的にバッテリ容量が減り、寿命低下の原因となる。   For example, a battery for driving is mounted on an electric vehicle or a hybrid vehicle. This battery generates heat due to charging and discharging during traveling, and becomes high temperature by repeating this charging and discharging. A battery (such as a lithium ion battery) generally deteriorates when the temperature rises above a predetermined level, peeling of members that form the gap, and precipitation of impurities, resulting in a decrease in battery capacity and a decrease in life. .

そこで、本出願人は、次のような技術を提案した。つまり、バッテリを冷却風によって冷却する。そして、冷房時においては、バッテリ排気風の温度が車室内温度より低い場合には、バッテリ排気風を車室内に戻し、車室内温度よりも高い場合には、バッテリ排気風を車室外に排出する。又、暖房時においては、バッテリ排気風の温度が車室内温度より高い場合には、バッテリ排気風を車室内に戻し、車室内温度よりも低い場合には、バッテリ排気風を車室外に排出する（特許文献１参照）。これにより、バッテリ排気風の熱の利用を図らんとするものである。
特開２００８−５５９９０号公報 Therefore, the present applicant has proposed the following technique. That is, the battery is cooled by the cooling air. During cooling, when the temperature of the battery exhaust air is lower than the vehicle interior temperature, the battery exhaust air is returned to the vehicle interior, and when it is higher than the vehicle interior temperature, the battery exhaust air is discharged outside the vehicle interior. . During heating, when the temperature of the battery exhaust air is higher than the temperature inside the vehicle interior, the battery exhaust air is returned to the vehicle interior, and when the temperature is lower than the vehicle interior temperature, the battery exhaust air is discharged outside the vehicle interior. (See Patent Document 1). As a result, the heat of the battery exhaust air is intended to be used.
JP 2008-55990 A

しかしながら、前記従来例では、バッテリ排気風を単に車室内に戻しているに過ぎないため、バッテリ排気風の熱を有効に利用できない。つまり、バッテリ排気風の熱利用が空調風そのものとしての利用に限られ、しかも、バッテリ排気風は温度調整された空調風ではないため、空調風としては質が悪く、かえって車室内の空調空間を劣化させる恐れもある。以上より、バッテリ排気風の熱が有効に利用されていない。   However, in the conventional example, since the battery exhaust air is merely returned to the vehicle interior, the heat of the battery exhaust air cannot be used effectively. In other words, the heat of the battery exhaust air is limited to the use as the air conditioning air itself, and the battery exhaust air is not the temperature adjusted air conditioning air. There is also a risk of deterioration. As described above, the heat of the battery exhaust air is not effectively used.

そこで、本発明は、バッテリ排気風の熱を有効に利用できる車両用排気熱回収システムを提供することを目的とする。   Then, an object of this invention is to provide the exhaust heat recovery system for vehicles which can utilize the heat | fever of battery exhaust wind effectively.

上記目的を達成する請求項１の発明は、バッテリを通過したバッテリ排気風の熱を吸熱する回収用熱交換器と、前記回収用熱交換器で回収した熱を放熱する還元用熱交換器とを有する排気熱回収サイクルを備えたことを特徴とする。   The invention according to claim 1 that achieves the above object includes a recovery heat exchanger that absorbs heat of the battery exhaust air that has passed through the battery, and a reduction heat exchanger that dissipates the heat recovered by the recovery heat exchanger. An exhaust heat recovery cycle having the following is provided.

請求項２の発明は、請求項１記載の車両用排気熱回収システムであって、前記回収用熱交換器は、車両用空気調和装置が外気を導入する外気導入モード時に、バッテリ排気風の熱を回収することを特徴とする。   The invention according to claim 2 is the vehicle exhaust heat recovery system according to claim 1, wherein the recovery heat exchanger is configured such that the heat of the battery exhaust wind is generated in the outside air introduction mode in which the vehicle air conditioner introduces outside air. It is characterized by collect | recovering.

請求項３の発明は、請求項１又は請求項２記載の車両用排気熱回収システムであって、車室内の空気である内気とバッテリを通過したバッテリ排気風とのいずれか一方を選択的に車室外に導く切替手段を備え、前記回収用熱交換器は、前記切替手段で選択された送風の熱を吸熱するよう構成されたことを特徴とする。   The invention of claim 3 is the vehicle exhaust heat recovery system according to claim 1 or 2, wherein either one of inside air as air in the passenger compartment and battery exhaust air passing through the battery is selectively used. A switching means for guiding the outside of the passenger compartment is provided, and the recovery heat exchanger is configured to absorb the heat of the air selected by the switching means.

請求項４の発明は、請求項３に記載の車両用排気熱回収システムであって、前記切替手段は、車両用空気調和装置が車室内の温度を暖める暖房時では、内気の温度がバッテリ排気風より高いときには、内気を前記回収用熱交換器側に導き、バッテリ排気風の温度が内気より高いときには、バッテリ排気風を前記回収用熱交換器側に導くよう切り替えたことを特徴とする。   According to a fourth aspect of the present invention, there is provided the exhaust heat recovery system for a vehicle according to the third aspect, wherein the switching means is configured such that the temperature of the inside air is discharged from the battery during heating when the vehicle air conditioner warms the temperature in the passenger compartment. When the temperature is higher than the wind, the inside air is guided to the recovery heat exchanger side, and when the temperature of the battery exhaust air is higher than the inside air, the battery exhaust air is switched to the recovery heat exchanger side.

請求項５の発明は、請求項４又は請求項４に記載の車両用排気熱回収システムであって、前記切替手段は、車両用空気調和装置が車室内の温度を冷却する冷房時では、内気の温度がバッテリ排気風より低いときには、内気を前記回収用熱交換器側に導き、バッテリ排気風の温度が内気より低いときには、バッテリ排気風を前記回収用熱交換器側に導くよう切り替えたことを特徴とする。   A fifth aspect of the present invention is the vehicle exhaust heat recovery system according to the fourth or fourth aspect, in which the switching unit is configured to operate the internal air during cooling when the vehicle air conditioner cools the temperature in the vehicle interior. When the temperature of the battery exhaust air is lower than the battery exhaust air, the inside air is led to the recovery heat exchanger side, and when the temperature of the battery exhaust air is lower than the internal air, the battery exhaust air is switched to the recovery heat exchanger side. It is characterized by.

請求項１の発明によれば、バッテリ排気風の熱を回収用熱交換器で一旦吸熱し、還元用熱交換器でバッテリ排気風の熱を放熱するため、バッテリ排気風の熱の放熱先を自由に選択することができる。従って、バッテリ排気風の熱を有効に利用できる。   According to the first aspect of the present invention, the heat of the battery exhaust air is once absorbed by the recovery heat exchanger, and the heat of the battery exhaust air is radiated by the reduction heat exchanger. You can choose freely. Therefore, the heat of the battery exhaust air can be used effectively.

請求項２の発明によれば、請求項１の発明の効果に加え、バッテリへの冷却風としては内気を使用することから、外気導入モードでは、バッテリを通過したバッテリ排気風によって熱回収をしつつ車室内の換気を行うことができる。   According to the invention of claim 2, in addition to the effect of the invention of claim 1, since the inside air is used as the cooling air to the battery, in the outside air introduction mode, heat is recovered by the battery exhaust air that has passed through the battery. In addition, it is possible to ventilate the passenger compartment.

請求項３の発明によれば、請求項１又は請求項２の発明の効果に加え、内気とバッテリ排気風のいずれかの熱を選択的に回収できるため、バッテリ排気風と内気の内で吸熱率の高い熱を回収することができる。   According to the invention of claim 3, in addition to the effect of the invention of claim 1 or 2, the heat of either the inside air or the battery exhaust air can be selectively recovered. High rate heat can be recovered.

請求項４の発明によれば、請求項３の発明の効果に加え、暖房時にあって、バッテリ排気風と内気の内で高温の方の温熱を回収するため、熱回収効率を向上させることができる。   According to the invention of claim 4, in addition to the effect of the invention of claim 3, the heat recovery efficiency is improved because the higher temperature of the battery exhaust air and the inside air is recovered during heating. it can.

請求項５の発明によれば、請求項３の発明の効果に加え、冷房時にあって、バッテリ排気風と内気の内で低温の方の冷熱を回収するため、熱回収効率を向上させることができる。   According to the invention of claim 5, in addition to the effect of the invention of claim 3, the heat recovery efficiency can be improved because the cooler heat is recovered in the battery exhaust air and the inside air during cooling. it can.

以下、本発明の実施形態を図面に基づいて説明する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings.

図１〜図７は本発明の一実施形態を示し、図１は車両用排気熱回収システムと車両用空気調和装置の概略構成図、図２は車両用排気熱回収システムの制御系の概略回路ブロック図、図３は暖房時における車両用排気熱回収システムの動作フローチャート、図４は冷房時における車両用排気熱回収システムの動作フローチャート、図５は内気の熱を回収する場合の第１及び第２切替ドアの位置を示す要部構成図、図６はバッテリ排気風の熱を回収する場合の第１及び第２切替ドアの位置を示す要部構成図、図７は各空調モードの各部の状態と熱回収の状態を示す図である。   1 to 7 show an embodiment of the present invention, FIG. 1 is a schematic configuration diagram of a vehicle exhaust heat recovery system and a vehicle air conditioner, and FIG. 2 is a schematic circuit of a control system of the vehicle exhaust heat recovery system. FIG. 3 is an operation flowchart of the vehicle exhaust heat recovery system at the time of heating, FIG. 4 is an operation flowchart of the vehicle exhaust heat recovery system at the time of cooling, and FIG. Fig. 6 is a main part configuration diagram showing the positions of the first and second switching doors when recovering the heat of the battery exhaust air, and Fig. 7 is a main part configuration diagram showing the positions of the two switching doors. It is a figure which shows a state and the state of heat recovery.

図１に示すように、自動車は、車両走行用のバッテリ１０を搭載した電気自動車又はハイブリッド車であり、車両用排気熱回収システム１と車両用空気調和装置２０を備えている。   As shown in FIG. 1, the automobile is an electric vehicle or a hybrid vehicle equipped with a battery 10 for running the vehicle, and includes a vehicle exhaust heat recovery system 1 and a vehicle air conditioner 20.

車両用排気熱回収システム１は、排気熱回収用ダクト２を有する。排気熱回収用ダクト２は、換気用通路３とバッテリ冷却用通路４とこれらを途中で連通させる連通路５とを有する。   The vehicle exhaust heat recovery system 1 includes an exhaust heat recovery duct 2. The exhaust heat recovery duct 2 includes a ventilation passage 3, a battery cooling passage 4, and a communication passage 5 that communicates them in the middle.

換気用通路３の最上流位置には、内気導入口６が形成されている。内気導入口６は、車室内に開口されている。換気用通路３の最下流は車外に開口されている。換気用通路３内で、且つ、連通路５の開口位置より下流には、回収用熱交換器３２が配置されている。回収用熱交換器３２は排気熱回収サイクル１３の構成要素であり、排気熱回収サイクル１３については、下記に説明する。   An inside air introduction port 6 is formed at the most upstream position of the ventilation passage 3. The inside air inlet 6 is opened in the vehicle interior. The most downstream side of the ventilation passage 3 is opened outside the vehicle. A recovery heat exchanger 32 is disposed in the ventilation passage 3 and downstream of the opening position of the communication passage 5. The recovery heat exchanger 32 is a constituent element of the exhaust heat recovery cycle 13, and the exhaust heat recovery cycle 13 will be described below.

バッテリ冷却用通路４の最上流には、内気導入口７が形成されている。内気導入口７は、車室内に開口されている。バッテリ冷却用通路４の最下流は、車室外であるトランクルーム（図示せず）に開口されている。バッテリ冷却用通路４には、バッテリ用送風機８とバッテリ冷却用熱交換器９とバッテリ１０がこの順に配置されている。バッテリ用送風機８の吸引力によって車室内の空気である内気を内気導入口７よりバッテリ冷却用通路４内に吸引する。バッテリ冷却用熱交換器９は、送風（内気）と冷媒との間で熱交換することによって送風を冷却する。バッテリ１０は、例えば、リチウムイオンを極間で交換して充電や放電を行うリチウムイオンバッテリである。バッテリ用送風機８とバッテリ冷却用熱交換器９とバッテリ１０は、制御部４０（図２に示す）によって駆動等が制御される。   An inside air introduction port 7 is formed in the uppermost stream of the battery cooling passage 4. The inside air introduction port 7 is opened in the vehicle interior. The most downstream side of the battery cooling passage 4 is opened to a trunk room (not shown) outside the vehicle compartment. In the battery cooling passage 4, a battery blower 8, a battery cooling heat exchanger 9, and a battery 10 are arranged in this order. Inside air, which is air in the vehicle compartment, is sucked into the battery cooling passage 4 from the inside air introduction port 7 by the suction force of the battery blower 8. The battery cooling heat exchanger 9 cools the blown air by exchanging heat between the blown air (inside air) and the refrigerant. The battery 10 is, for example, a lithium ion battery that performs charging and discharging by exchanging lithium ions between electrodes. The drive of the battery blower 8, the battery cooling heat exchanger 9 and the battery 10 is controlled by the control unit 40 (shown in FIG. 2).

又、換気用通路３とバッテリ冷却用通路４には、切替手段である第１切替ドア１１及び第２切替ドア１２がそれぞれ設けられている。第１切替ドア１１は、図１のａ位置とｂ位置の間を移動し、換気用通路３の開閉を行う。第２切替ドア１２は、図１のｃ位置とｄ位置の間を移動し、バッテリ排気風の送風方向をバッテリ冷却用通路４側と換気用通路３（連通路５）側に切り替える。第１切替ドア１１と第２切替ドア１２は、制御部４０によって切替位置が制御される。つまり、第１切替ドア１１と第２切替ドア１２は、車室内の空気である内気とバッテリ１０を通過したバッテリ排気風とのいずれか一方を選択的に回収用熱交換器３２側に導き、その後、車室外に導くことができる。   The ventilation passage 3 and the battery cooling passage 4 are respectively provided with a first switching door 11 and a second switching door 12 which are switching means. The first switching door 11 moves between the positions a and b in FIG. 1 and opens and closes the ventilation passage 3. The second switching door 12 moves between the c position and the d position in FIG. 1 and switches the blowing direction of the battery exhaust air to the battery cooling passage 4 side and the ventilation passage 3 (communication passage 5) side. The switching positions of the first switching door 11 and the second switching door 12 are controlled by the control unit 40. That is, the first switching door 11 and the second switching door 12 selectively guide either one of the inside air that is the air in the vehicle interior and the battery exhaust air that has passed through the battery 10 to the recovery heat exchanger 32 side, After that, it can be led out of the passenger compartment.

また、換気用通路３の連通路５よりも上流位置には、内気温度センサＳ１が設けられている。内気温度センサＳ１は、車室内の空気温度を検知する。バッテリ冷却用通路４のバッテリ１０より下流位置には、バッテリ排気風温度センサＳ２が設けられている。バッテリ排気風温度センサＳ２は、バッテリ１０を通過したバッテリ排気風の温度を検知する。又、車外には、車外の外気温度を検知する外気温度センサＳ３が設けられている。   Further, an inside air temperature sensor S1 is provided at a position upstream of the communication passage 5 of the ventilation passage 3. The inside air temperature sensor S1 detects the air temperature in the passenger compartment. A battery exhaust air temperature sensor S <b> 2 is provided at a position downstream of the battery 10 in the battery cooling passage 4. The battery exhaust air temperature sensor S <b> 2 detects the temperature of the battery exhaust air that has passed through the battery 10. Outside the vehicle, an outside air temperature sensor S3 for detecting outside air temperature outside the vehicle is provided.

車両用空気調和装置２０は、車両の車室の前部に配置された空調ケース２１を有する。この空調ケース２１内には送風路２２が設けられている。この送風路２２の最上流部には、車室外の空気である外気を導入する外気導入口２３と、車室内の空気である内気を導入する内気導入口２４が設けられている。外気導入口２３と内気導入口２４は、インテークドア２５によって開閉される。インテークドア２５は、図１にて実線で示す外気導入位置と図１にて破線で示す内気導入位置との間を移動する。   The vehicle air conditioner 20 has an air conditioning case 21 disposed in the front part of the vehicle compartment. An air passage 22 is provided in the air conditioning case 21. At the most upstream part of the air passage 22, an outside air introduction port 23 for introducing outside air that is air outside the passenger compartment and an inside air introduction port 24 for introducing inside air that is air inside the passenger compartment are provided. The outside air introduction port 23 and the inside air introduction port 24 are opened and closed by an intake door 25. The intake door 25 moves between an outside air introduction position indicated by a solid line in FIG. 1 and an inside air introduction position indicated by a broken line in FIG.

送風路２２内には、送風機２６とエバポレータ（図示せず）とヒータコア（図示せず）がこの順に配置されいている。送風機２６の吸引力によって送風路２２に内気や外気が吸引される。送風路２２に吸引された送風は、エバポレータとヒータコアによって所望温度の空調風とされて車室内に吹き出される。   A blower 26, an evaporator (not shown), and a heater core (not shown) are arranged in this order in the air passage 22. Inside air and outside air are sucked into the air passage 22 by the suction force of the blower 26. The air sucked into the air passage 22 is conditioned air at a desired temperature by the evaporator and the heater core and blown out into the passenger compartment.

排気熱回収サイクル１３は、顕熱での熱交換を行う循環水を圧送するウォータポンプ３１と、前記した回収用熱交換器３２と、還元用熱交換器３３と、これらを接続する複数の配管３４とを備え、サイクル内を循環水が循環する。回収用熱交換器３２は、前記したように車両用排気熱回収システム１の換気用通路３に配置され、車外に排出される内気又はバッテリ排気風との間で熱交換することによって内気又はバッテリ排気風より吸熱する。還元用熱交換器３３は、車両用空気調和装置２０の外気導入口２３付近の送風路２２に配置され、導入外気との間で熱交換することによって導入外気に放熱する。   The exhaust heat recovery cycle 13 includes a water pump 31 that pumps circulating water that performs heat exchange with sensible heat, the above-described recovery heat exchanger 32, a reduction heat exchanger 33, and a plurality of pipes that connect them. 34, and circulating water circulates in the cycle. The recovery heat exchanger 32 is disposed in the ventilation passage 3 of the vehicle exhaust heat recovery system 1 as described above, and exchanges heat with the inside air discharged from the vehicle or the battery exhaust air, thereby allowing the inside air or the battery to exchange heat. It absorbs heat from the exhaust air. The reduction heat exchanger 33 is disposed in the air passage 22 in the vicinity of the outside air inlet 23 of the vehicle air conditioner 20, and radiates heat to the introduced outside air by exchanging heat with the introduced outside air.

図２に示すように、制御部４０には、内気温度センサＳ１、バッテリ排気風温度センサＳ２、外気温度センサＳ３等の検知温度が入力されている。制御部４０は、これら検知温度情報等に基づいてインテークドア２５のインテークドア駆動部４１、第１切替ドア１１の第１切替ドア駆動部４２、第２切替ドア１２の第２切替ドア駆動部４３、バッテリ用送風機８、バッテリ冷却用熱交換器９、ウォータポンプ３１等の駆動を制御する。制御部４０は、車両用空気調和装置２０の暖房時及び冷房時には、車両用排気熱回収システム１に対し図４及び図５に示すフローを実行する。この制御内容については、下記に詳述する。   As shown in FIG. 2, detected temperatures of the inside air temperature sensor S1, the battery exhaust air temperature sensor S2, the outside air temperature sensor S3, and the like are input to the control unit 40. Based on the detected temperature information and the like, the control unit 40 includes an intake door drive unit 41 of the intake door 25, a first switching door drive unit 42 of the first switching door 11, and a second switching door drive unit 43 of the second switching door 12. The driving of the battery blower 8, the battery cooling heat exchanger 9, the water pump 31 and the like is controlled. The control part 40 performs the flow shown in FIG.4 and FIG.5 with respect to the exhaust heat recovery system 1 for vehicles at the time of heating and air_conditioning | cooling of the air conditioning apparatus 20 for vehicles. This control content will be described in detail below.

次に、上記構成における動作を、車両用排気熱回収システム１の動作を中心に説明する。図３及び図４に示すように、イグニッションキーのオン時で、且つ、車両用空気調和装置２０が駆動されている場合にあって（ステップＳＯ）、空調モードが暖房と冷房のいずれかを確認する（ステップＳ１）。   Next, the operation in the above configuration will be described focusing on the operation of the vehicle exhaust heat recovery system 1. As shown in FIGS. 3 and 4, when the ignition key is turned on and the vehicle air conditioner 20 is being driven (step SO), it is confirmed whether the air conditioning mode is heating or cooling. (Step S1).

図３に示すように、暖房時には、先ず、外気導入モードか否かを確認する（ステップＳ２）。内気導入モードであれば、例えば第１切替ドア１１をａ位置、第２切替ドア１２をｄ位置とし、ウォータポンプ３１を駆動せず、熱回収は行わない（ステップＳ３）。   As shown in FIG. 3, at the time of heating, it is first confirmed whether or not the outside air introduction mode is set (step S2). In the inside air introduction mode, for example, the first switching door 11 is set to the a position, the second switching door 12 is set to the d position, the water pump 31 is not driven, and heat recovery is not performed (step S3).

外気導入モードであれば、バッテリ用送風機８の駆動の有無を確認する（ステップＳ４）。バッテリ用送風機８が停止状態であれば、第１切替ドア１１をｂ位置、第２切替ドア１２をｃ位置とする（図５参照）。これにより、内気が回収用熱交換器３２側に供給され、内気からの熱回収が行われる（ステップＳ５）。   If it is outside air introduction mode, the presence or absence of the drive of the battery air blower 8 is confirmed (step S4). If the battery blower 8 is in a stopped state, the first switching door 11 is set to the b position and the second switching door 12 is set to the c position (see FIG. 5). As a result, the inside air is supplied to the recovery heat exchanger 32 side, and heat is recovered from the inside air (step S5).

バッテリ用送風機８が駆動状態であれば、次に、バッテリ冷却用熱交換器９の駆動の有無を確認する（ステップＳ６）。バッテリ冷却用熱交換器９が停止状態であれば、第１切替ドア１１をｂ位置、第２切替ドア１２をｃ位置とする（図５参照）。これにより、内気が回収用熱交換器３２側に供給され、内気からの熱回収が行われる（ステップＳ７）。   If the battery blower 8 is in a driving state, next, it is confirmed whether or not the battery cooling heat exchanger 9 is driven (step S6). If the battery cooling heat exchanger 9 is stopped, the first switching door 11 is set to the b position and the second switching door 12 is set to the c position (see FIG. 5). Thereby, the inside air is supplied to the recovery heat exchanger 32 side, and heat is recovered from the inside air (step S7).

バッテリ冷却用熱交換器９が駆動状態であれば、次に、空気温度（バッテリ排気風、内気等の温度）を確認する（ステップＳ８）。そして、バッテリ排気風の温度が内気より高ければ、第１切替ドア１１をａ位置、第２切替ドア１２をｄ位置とする（図６参照）。これにより、バッテリ排気風が回収用熱交換器３２側に供給され、バッテリ排気風からの熱回収が行われる（ステップＳ９）。バッテリ排気風の温度が内気の温度以下であれば、第１切替ドア１１をｂ位置、第２切替ドア１２をｃ位置とする（図５参照）。これにより、内気が回収用熱交換器３２側に供給され、内気からの熱回収が行われる（ステップＳ１０）。   If the battery cooling heat exchanger 9 is in a driving state, the air temperature (battery exhaust air temperature, internal air temperature, etc.) is then checked (step S8). If the temperature of the battery exhaust air is higher than the inside air, the first switching door 11 is set to the a position and the second switching door 12 is set to the d position (see FIG. 6). Thereby, the battery exhaust air is supplied to the recovery heat exchanger 32 side, and heat recovery from the battery exhaust air is performed (step S9). If the temperature of the battery exhaust air is equal to or lower than the temperature of the inside air, the first switching door 11 is set to the b position and the second switching door 12 is set to the c position (see FIG. 5). As a result, the inside air is supplied to the recovery heat exchanger 32 side, and heat is recovered from the inside air (step S10).

図４に示すように、冷房時でも、先ず、外気導入モードか否かを確認する（ステップＳ１１）。内気導入モードであれば、例えば第１切替ドア１１をａ位置、第２切替ドア１２をｄ位置とし、ウォータポンプ３１を駆動せず、熱回収は行わない（ステップＳ１２）。   As shown in FIG. 4, it is first confirmed whether or not the outside air introduction mode is set even during cooling (step S11). In the inside air introduction mode, for example, the first switching door 11 is set to the a position, the second switching door 12 is set to the d position, the water pump 31 is not driven, and heat recovery is not performed (step S12).

外気導入モードであれば、バッテリ用送風機８の駆動の有無を確認する（ステップＳ１３）。バッテリ用送風機８が停止状態であれば、第１切替ドア１１をｂ位置、第２切替ドア１２をｃ位置とする（図５参照）。これにより、内気が回収用熱交換器３２側に供給され、内気からの熱回収が行われる（ステップＳ１４）。   If it is outside air introduction mode, the presence or absence of the drive of the battery air blower 8 is confirmed (step S13). If the battery blower 8 is in a stopped state, the first switching door 11 is set to the b position and the second switching door 12 is set to the c position (see FIG. 5). As a result, the inside air is supplied to the recovery heat exchanger 32 side, and heat is recovered from the inside air (step S14).

バッテリ用送風機８が駆動状態であれば、次に、バッテリ冷却用熱交換器９の駆動の有無を確認する（ステップＳ１５）。バッテリ冷却用熱交換器９が停止状態であれば、第１切替ドア１１をｂ位置、第２切替ドア１２をｃ位置とする（図５参照）。これにより、内気が回収用熱交換器３２側に供給され、内気からの熱回収が行われる（ステップＳ１６）。   If the battery blower 8 is in a driving state, next, it is confirmed whether or not the battery cooling heat exchanger 9 is driven (step S15). If the battery cooling heat exchanger 9 is stopped, the first switching door 11 is set to the b position and the second switching door 12 is set to the c position (see FIG. 5). Thereby, the inside air is supplied to the recovery heat exchanger 32 side, and heat is recovered from the inside air (step S16).

バッテリ冷却用熱交換器９が駆動状態であれば、次に、空気温度（バッテリ排気風、内気等の温度）を確認する（ステップＳ１７）。そして、バッテリ排気風の温度が内気より高ければ、第１切替ドア１１をｂ位置、第２切替ドア１２をｃ位置とする（図５参照）。これにより、内気からの熱回収が行われる（ステップＳ１８）。バッテリ排気風の温度が内気の温度以下であれば、第１切替ドア１１をａ位置、第２切替ドア１２をｄ位置とする（図６参照）。これにより、バッテリ排気風が回収用熱交換器３２側に供給され、バッテリ排気風からの熱回収が行われる（ステップＳ１９）。尚、外気温度が内気とバッテリ排気風のいずれより低い場合には、熱回収を行わないようにする。   If the battery cooling heat exchanger 9 is in a driving state, next, the air temperature (temperature of battery exhaust air, inside air, etc.) is confirmed (step S17). If the temperature of the battery exhaust air is higher than the inside air, the first switching door 11 is set to the b position and the second switching door 12 is set to the c position (see FIG. 5). Thereby, heat recovery from the inside air is performed (step S18). If the temperature of the battery exhaust air is equal to or lower than the temperature of the inside air, the first switching door 11 is set to the a position and the second switching door 12 is set to the d position (see FIG. 6). Thereby, the battery exhaust air is supplied to the recovery heat exchanger 32 side, and heat recovery from the battery exhaust air is performed (step S19). Note that heat recovery is not performed when the outside air temperature is lower than either the inside air or the battery exhaust air.

図７には、上記説明した熱回収の状態をも含め、各空調モードの各部の状態と熱回収の状態が示されている。   FIG. 7 shows the state of each part and the state of heat recovery in each air conditioning mode, including the state of heat recovery described above.

上記したように車両用排気熱回収システム１によって、暖房時には、内気又はバッテリ排気風の温熱を回収用熱交換器３２で回収し、この回収した温熱が還元用熱交換器３３で導入外気に放熱され、これにより温度上昇された外気が車両用空気調和装置２０に導入される。又、冷房時には、内気又はバッテリ排気風の冷熱を回収用熱交換器３２で回収し、この回収した冷熱が還元用熱交換器３３で導入外気に放熱され、これにより温度降下された外気が車両用空気調和装置２０に導入される。従って、車両用空気調和装置２０の空調効率が向上する。   As described above, during heating, the vehicle exhaust heat recovery system 1 recovers the temperature of the internal air or the battery exhaust air by the recovery heat exchanger 32, and the recovered heat is radiated to the introduced outside air by the reduction heat exchanger 33. Thus, the outside air whose temperature has been increased by this is introduced into the vehicle air conditioner 20. Further, during cooling, the cold heat of the internal air or the battery exhaust air is recovered by the recovery heat exchanger 32, and the recovered cold heat is radiated to the introduced external air by the reduction heat exchanger 33, and the external air whose temperature has been reduced thereby is It is introduced into the air conditioner 20 for use. Therefore, the air conditioning efficiency of the vehicle air conditioner 20 is improved.

以上説明したように、バッテリ１０を通過したバッテリ排気風の熱を吸熱する回収用熱交換器３２と、この回収用熱交換器３２で回収した熱を放熱する還元用熱交換器３３とを備えている。従って、バッテリ排気風の熱を回収用熱交換器３２で一旦吸熱し、還元用熱交換器３３でバッテリ排気風の熱を放熱するため、バッテリ排気風の熱の放熱先（この実施形態では、車両用空気調和装置２０の導入外気を放熱先としている。）を自由に選択することができる。従って、バッテリ排気風の熱を有効に利用できる。   As described above, the recovery heat exchanger 32 that absorbs the heat of the battery exhaust air that has passed through the battery 10 and the reduction heat exchanger 33 that dissipates the heat recovered by the recovery heat exchanger 32 are provided. ing. Therefore, since the heat of the battery exhaust air is once absorbed by the recovery heat exchanger 32 and the heat of the battery exhaust air is radiated by the reduction heat exchanger 33, the heat of the battery exhaust air is radiated (in this embodiment, The outside air introduced into the vehicle air conditioner 20 is used as a heat release destination.) Can be freely selected. Therefore, the heat of the battery exhaust air can be used effectively.

回収用熱交換器３２は、車両用空気調和装置２０が外気を導入する外気導入モード時に、バッテリ排気風の熱を回収している。バッテリ１０への冷却風としては内気を使用することから、外気導入モードでは、バッテリ１０を通過したバッテリ排気風によって熱回収をしつつ車室内の換気を行うことができる。   The recovery heat exchanger 32 recovers the heat of the battery exhaust air during the outside air introduction mode in which the vehicle air conditioner 20 introduces outside air. Since the inside air is used as the cooling air to the battery 10, in the outside air introduction mode, the vehicle interior can be ventilated while heat is recovered by the battery exhaust air that has passed through the battery 10.

車室内の空気である内気とバッテリ１０を通過したバッテリ排気風とのいずれか一方を選択的に車室外に導く第１及び第２切替ドア１１，１２を備え、回収用熱交換器３２は、第１及び第２切替ドア１１，１２で選択された送風の熱を吸熱するよう構成されている。従って、内気とバッテリ排気風のいずれかの熱を選択的に回収できるため、バッテリ排気風と内気の内で吸熱率の高い熱を回収可能である。   The recovery heat exchanger 32 includes first and second switching doors 11 and 12 that selectively guide either one of the inside air that is the air in the vehicle interior and the battery exhaust air that has passed through the battery 10 to the outside of the vehicle interior. It is comprised so that the heat | fever of the ventilation selected by the 1st and 2nd switching doors 11 and 12 may be absorbed. Therefore, heat of either the internal air or the battery exhaust air can be selectively recovered, so that heat having a high heat absorption rate can be recovered in the battery exhaust air and the internal air.

具体的には、第１及び第２切替ドア１１，１２は、車両用空気調和装置２０の暖房時では、内気の温度がバッテリ排気風より高いときには、内気を回収用熱交換器３２側に導き、バッテリ排気風の温度が内気より高いときには、バッテリ排気風を回収用熱交換器３２側に導くよう切り替えるので、暖房時にあって、バッテリ排気風と内気の内で高温の方の温熱を回収するため、熱回収効率を向上させることができる。   Specifically, the first and second switching doors 11 and 12 guide the inside air to the recovery heat exchanger 32 side when the temperature of the inside air is higher than the battery exhaust air during heating of the vehicle air conditioner 20. When the temperature of the battery exhaust air is higher than the inside air, the battery exhaust air is switched so as to be guided to the recovery heat exchanger 32 side, so that the higher temperature of the battery exhaust air and the inside air is recovered during heating. Therefore, heat recovery efficiency can be improved.

第１及び第２切替ドア１１，１２は、車両用空気調和装置２０の冷房時では、内気の温度がバッテリ排気風より低いときには、内気を回収用熱交換器３２側に導き、バッテリ排気風の温度が内気より低いときには、バッテリ排気風を回収用熱交換器３２側に導くよう切り替えたので、冷房時にあって、バッテリ排気風と内気の内で低温の方の冷熱を回収するため、熱回収効率を向上させることができる。   The first and second switching doors 11 and 12 guide the inside air to the recovery heat exchanger 32 side when the temperature of the inside air is lower than the battery exhaust air when the vehicle air conditioner 20 is being cooled. When the temperature is lower than the inside air, the battery exhaust air is switched so as to be guided to the recovery heat exchanger 32 side. Therefore, during the cooling, the lower temperature of the battery exhaust air and the inside air is recovered. Efficiency can be improved.

（変形例）
前記実施形態では回収用熱交換器３２で回収した熱を車両用空気調和装置２０の導入外気に放熱しているが、放熱先を自由に選択でき、座席シート、車両天井等の冷却、加熱に利用しても良い。又、回収した熱を快適な空調空間の形成ではなく、クーラボックスの補助冷房などに利用しても良い。 (Modification)
In the above-described embodiment, the heat recovered by the recovery heat exchanger 32 is radiated to the outside air introduced into the vehicle air conditioner 20, but the heat radiating destination can be freely selected to cool and heat the seat, the vehicle ceiling, and the like. May be used. Further, the recovered heat may be used not for the formation of a comfortable air-conditioned space but for auxiliary cooling of the cooler box.

本発明の一実施形態を示し、車両用排気熱回収システムと車両用空気調和装置の概略構成図である。1 is a schematic configuration diagram of a vehicle exhaust heat recovery system and a vehicle air conditioner according to an embodiment of the present invention. 本発明の一実施形態を示し、車両用排気熱回収システムの制御系の概略回路ブロック図である。1 is a schematic circuit block diagram of a control system of a vehicle exhaust heat recovery system according to an embodiment of the present invention. 本発明の一実施形態を示し、暖房時における車両用排気熱回収システムの動作フローチャートである。It is an operation | movement flowchart of the exhaust heat recovery system for vehicles at the time of heating which shows one Embodiment of this invention. 本発明の一実施形態を示し、冷房時における車両用排気熱回収システムの動作フローチャートである。1 is an operation flowchart of an exhaust heat recovery system for a vehicle during cooling according to an embodiment of the present invention. 本発明の一実施形態を示し、内気の熱を回収する場合の第１及び第２切替ドアの位置を示す要部構成図である。It is a principal part block diagram which shows one Embodiment of this invention, and shows the position of the 1st and 2nd switching door in the case of collect | recovering the heat | fever of internal air. 本発明の一実施形態を示し、バッテリ排気風の熱を回収する場合の第１及び第２切替ドアの位置を示す要部構成図である。FIG. 3 is a main part configuration diagram illustrating the position of the first and second switching doors when the heat of the battery exhaust air is recovered according to the embodiment of the present invention. 本発明の一実施形態を示し、各空調モードの各部の状態と熱回収の状態を示す図である。It is a figure which shows one Embodiment of this invention and shows the state of each part of each air-conditioning mode, and the state of heat recovery.

符号の説明Explanation of symbols

１ 車両用排気熱回収システム
１０ バッテリ
１１ 第１切替ドア（切替手段）
１２ 第２切替ドア（切替手段）
１３ 排気熱回収サイクル
２０ 車両用空気調和装置
３２ 回収用熱交換器
３３ 還元用熱交換器 DESCRIPTION OF SYMBOLS 1 Vehicle exhaust heat recovery system 10 Battery 11 1st switching door (switching means)
12 Second switching door (switching means)
13 Exhaust Heat Recovery Cycle 20 Vehicle Air Conditioner 32 Recovery Heat Exchanger 33 Reduction Heat Exchanger

Claims (5)

バッテリ（１０）を通過したバッテリ排気風の熱を吸熱する回収用熱交換器（３２）と、前記回収用熱交換器（３２）で回収した熱を放熱する還元用熱交換器（３３）とを有する排気熱回収サイクル（１３）を備えたことを特徴とする車両用排気熱回収システム（１）。   A recovery heat exchanger (32) that absorbs the heat of the battery exhaust air that has passed through the battery (10), and a reduction heat exchanger (33) that dissipates the heat recovered by the recovery heat exchanger (32). An exhaust heat recovery system (1) for a vehicle comprising an exhaust heat recovery cycle (13) having 請求項１記載の車両用排気熱回収システム（１）であって、
前記回収用熱交換器（３２）は、車両用空気調和装置（２０）が外気を導入する外気導入モード時に、バッテリ排気風の熱を回収することを特徴とする車両用排気熱回収システム（１）。 An exhaust heat recovery system (1) for a vehicle according to claim 1,
The recovery heat exchanger (32) recovers the heat of the battery exhaust air in the outside air introduction mode in which the vehicle air conditioner (20) introduces outside air. ). 請求項１又は請求項２記載の車両用排気熱回収システム（１）であって、
車室内の空気である内気とバッテリ（１０）を通過したバッテリ排気風とのいずれか一方を選択的に車室外に導く切替手段（１１），（１２）を備え、
前記回収用熱交換器（３２）は、前記切替手段（１１），（１２）で選択された送風の熱を吸熱するよう構成されたことを特徴とする車両用排気熱回収システム（１）。 The vehicle exhaust heat recovery system (1) according to claim 1 or 2,
Switching means (11), (12) for selectively guiding either the inside air, which is the air in the passenger compartment, or the battery exhaust air that has passed through the battery (10), to the outside of the passenger compartment,
The vehicle exhaust heat recovery system (1), wherein the recovery heat exchanger (32) is configured to absorb the heat of the air selected by the switching means (11), (12). 請求項３に記載の車両用排気熱回収システム（１）であって、
前記切替手段（１１），（１２）は、車両用空気調和装置（２０）が車室内の温度を暖める暖房時では、内気の温度がバッテリ排気風より高いときには、内気を前記回収用熱交換器（３２）側に導き、バッテリ排気風の温度が内気より高いときには、バッテリ排気風を前記回収用熱交換器（３２）側に導くよう切り替えたことを特徴とする車両用排気熱回収システム（１）。 The vehicle exhaust heat recovery system (1) according to claim 3,
The switching means (11), (12) is configured so that when the vehicle air conditioner (20) heats the temperature in the passenger compartment and the temperature of the inside air is higher than the battery exhaust air, the inside air is recovered from the recovery heat exchanger. The vehicle exhaust heat recovery system (1) is switched to guide the battery exhaust air to the recovery heat exchanger (32) when the temperature of the battery exhaust air is higher than the inside air. ). 請求項４又は請求項４に記載の車両用排気熱回収システム（１）であって、
前記切替手段（１１），（１２）は、車両用空気調和装置（２０）が車室内の温度を冷却する冷房時では、内気の温度がバッテリ排気風より低いときには、内気を前記回収用熱交換器（３２）側に導き、バッテリ排気風の温度が内気より低いときには、バッテリ排気風を前記回収用熱交換器（３２）側に導くよう切り替えたことを特徴とする車両用排気熱回収システム（１）。 The vehicle exhaust heat recovery system (1) according to claim 4 or 4,
When the vehicle air conditioner (20) cools down the temperature in the passenger compartment and the temperature of the inside air is lower than the battery exhaust air, the switching means (11) and (12) When the temperature of the battery exhaust air is lower than the inside air, the vehicle exhaust heat recovery system is switched to guide the battery exhaust air to the recovery heat exchanger (32). 1).
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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012158261A (en) * 2011-02-01 2012-08-23 Mitsubishi Motors Corp Exhaust structure of electric vehicle
CN112550076A (en) * 2020-12-03 2021-03-26 上汽大众汽车有限公司 Thermal runaway prevention and control equipment for battery pack air duct

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JPS59149819A (en) * 1983-02-15 1984-08-27 Shiraki Kinzoku Kogyo Kk Air cleaner
JPH08253019A (en) * 1995-03-16 1996-10-01 Nissan Motor Co Ltd Air conditioner for vehicle
JPH08276716A (en) * 1995-04-06 1996-10-22 Sanden Corp Air conditioner for vehicle
JP2008141945A (en) * 2006-11-08 2008-06-19 Toyota Motor Corp Cooling device for electricity storage mechanism

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JPS5711108A (en) * 1980-06-26 1982-01-20 Nippon Denso Co Ltd Air conditioner for vehicle
JPS59149819A (en) * 1983-02-15 1984-08-27 Shiraki Kinzoku Kogyo Kk Air cleaner
JPH08253019A (en) * 1995-03-16 1996-10-01 Nissan Motor Co Ltd Air conditioner for vehicle
JPH08276716A (en) * 1995-04-06 1996-10-22 Sanden Corp Air conditioner for vehicle
JP2008141945A (en) * 2006-11-08 2008-06-19 Toyota Motor Corp Cooling device for electricity storage mechanism

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2012158261A (en) * 2011-02-01 2012-08-23 Mitsubishi Motors Corp Exhaust structure of electric vehicle
CN112550076A (en) * 2020-12-03 2021-03-26 上汽大众汽车有限公司 Thermal runaway prevention and control equipment for battery pack air duct

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