JPH06183249A - Air conditioner for vehicle - Google Patents
Air conditioner for vehicleInfo
- Publication number
- JPH06183249A JPH06183249A JP34202792A JP34202792A JPH06183249A JP H06183249 A JPH06183249 A JP H06183249A JP 34202792 A JP34202792 A JP 34202792A JP 34202792 A JP34202792 A JP 34202792A JP H06183249 A JPH06183249 A JP H06183249A
- Authority
- JP
- Japan
- Prior art keywords
- cooling water
- temperature
- vehicle
- heating
- heat exchanger
- 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
- 239000000498 cooling water Substances 0.000 claims abstract description 112
- 238000010438 heat treatment Methods 0.000 claims abstract description 50
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 21
- 239000003507 refrigerant Substances 0.000 claims description 21
- 238000001514 detection method Methods 0.000 claims description 8
- 238000004378 air conditioning Methods 0.000 claims description 6
- 238000001816 cooling Methods 0.000 claims description 4
- 239000008236 heating water Substances 0.000 claims 1
- 238000010257 thawing Methods 0.000 abstract description 4
- 239000002826 coolant Substances 0.000 abstract description 2
- 230000000630 rising effect Effects 0.000 description 6
- 239000011521 glass Substances 0.000 description 3
- 230000017525 heat dissipation Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000007664 blowing Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 230000007704 transition Effects 0.000 description 1
- 239000002918 waste heat Substances 0.000 description 1
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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
Landscapes
- Compression-Type Refrigeration Machines With Reversible Cycles (AREA)
- Air-Conditioning For Vehicles (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、車両駆動用エンジンの
冷却水の放熱とヒートポンプとを用いて車室内の暖房を
行うようにした車両用空調装置に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle air conditioner which uses a heat pump to dissipate cooling water for a vehicle drive engine and heat a vehicle interior.
【０００２】[0002]
【従来の技術】従来、例えばバスのような大型車両にお
いては、車室内の暖房を行う装置として、車両駆動用の
エンジンの冷却水の熱を利用して暖房を行う構成とする
ために、ヒータコア，デフロスタなどを設けた冷却水循
環路中に予熱機を設けておき、暖房運転の立ち上がり時
に冷却水を予熱機により加熱することにより、冷却水の
温度上昇を早め、車室内の暖房およびデフロスト機能を
迅速に行えるようにしたものがある。2. Description of the Related Art Conventionally, in a large vehicle such as a bus, as a device for heating the interior of a vehicle, a heater core is used in order to use the heat of cooling water of an engine for driving the vehicle to perform heating. , A preheater is installed in the cooling water circuit provided with a defroster, etc., and the cooling water is heated by the preheater at the start of heating operation to accelerate the temperature rise of the cooling water and to provide heating and defrosting functions for the passenger compartment. There are things that can be done quickly.
【０００３】[0003]
【発明が解決しようとする課題】しかしながら、上述の
ような予熱機を用いる従来構成のものでは、外気温度が
低いと冷却水の温度が上昇するまでに時間がかかり、ヒ
ータコアおよびデフロスタからの吹出温度が最初のうち
は低くなるため、暖房の立ち上がり特性が悪くなる不具
合がある。However, in the conventional structure using the preheater as described above, it takes time until the temperature of the cooling water rises when the outside air temperature is low, and the temperature blown out from the heater core and the defroster is high. Is low at the beginning, there is a problem that the heating rising characteristics deteriorate.
【０００４】一方、車室内の暖房を迅速に行うべく、ヒ
ートポンプを別途に設けて構成し、冷却水の温度が低い
ときにヒートポンプを駆動して暖房立ち上がり特性の向
上を図ったものが特開平２−１８５８２１号公報に示さ
れている。ところが、このものにおいては、車室内の暖
房はヒートポンプにより迅速に立ち上がるようになる
が、デフロスタは冷却水循環路に設けられているため、
依然として冷却水の温度が上昇するまでその機能が十分
に果たせなくなる不具合がある。On the other hand, in order to quickly heat the passenger compartment, a heat pump is separately provided, and when the temperature of the cooling water is low, the heat pump is driven to improve the heating rising characteristic. No. 185,821. However, in this case, the heating of the passenger compartment can be quickly started by the heat pump, but since the defroster is provided in the cooling water circulation path,
Still, there is a problem that the function cannot be fully performed until the temperature of the cooling water rises.
【０００５】本発明は、上記事情に鑑みてなされたもの
で、その目的は、ヒートポンプを用いる構成として暖房
運転の立ち上がり性能を確保しつつ、且つ、デフロスタ
によるガラスの曇り取りの機能の立ち上がり性能をも確
保することができる車両用空調装置を提供することにあ
る。The present invention has been made in view of the above circumstances, and an object thereof is to secure the rising performance of heating operation as a structure using a heat pump and to improve the rising performance of the defrosting function of defrosting glass. It is to provide an air conditioning system for a vehicle that can ensure the above.
【０００６】[0006]
【課題を解決するための手段】本発明の車両用空調装置
は、車両駆動用エンジンを冷却する冷却水の一部が流通
する冷却水循環路と、この冷却水循環路に設けられその
冷却水の放熱により車室内を暖房するための温水ヒータ
と、前記冷却水循環路に設けられ前記冷却水の放熱によ
り車室の窓の曇りを取るためのデフロスタと、コンプレ
ッサにより冷媒を循環させることによりその冷媒循環路
中の車室内側熱交換器から放熱させて前記車室内を暖房
するヒートポンプと、弁装置の開状態で前記冷却水循環
路を流通する冷却水を前記車両駆動用エンジンをバイパ
スさせるバイパス通路と、前記ヒートポンプの冷媒の放
熱により前記冷却水循環路中の冷却水を加熱する冷却水
加熱用熱交換器と、前記車両駆動用エンジンの冷却水の
温度を検出する温度検出手段と、暖房運転開始時に前記
温度検出手段により検出された前記冷却水の温度が所定
温度以下のときに、前記弁装置を開状態に駆動制御する
制御手段とを設けて構成したところに特徴を有する。A vehicle air conditioner according to the present invention includes a cooling water circulation passage through which a part of cooling water for cooling a vehicle driving engine flows, and heat dissipation of the cooling water provided in the cooling water circulation passage. With a hot water heater for heating the interior of the vehicle, a defroster provided in the cooling water circulation passage for clearing the windows of the vehicle interior by radiating the cooling water, and a refrigerant circulation passage for circulating a refrigerant by a compressor. A heat pump that radiates heat from a heat exchanger inside the vehicle interior to heat the vehicle interior; a bypass passage that bypasses the vehicle drive engine with cooling water that flows through the cooling water circulation passage when the valve device is open; A heat exchanger for heating the cooling water for heating the cooling water in the cooling water circulation path by radiating heat of the refrigerant of the heat pump, and a temperature for detecting the temperature of the cooling water for the vehicle driving engine. It is characterized in that it is provided with a detection means and a control means for driving and controlling the valve device to an open state when the temperature of the cooling water detected by the temperature detection means at the start of heating operation is equal to or lower than a predetermined temperature. Have.
【０００７】[0007]
【作用】本発明の車両用空調装置によれば、例えば車両
駆動用エンジンを駆動した直後においては、その冷却水
の温度がまだ低い状態にあり、この状態で暖房運転を開
始した場合には、制御手段は、温度検出手段からの冷却
水の温度の検出信号が所定温度以下であることにより、
バイパス通路の弁装置を開状態に駆動制御する。これに
より、冷却水循環路を流通する冷却水は車両駆動用エン
ジンを回避してバイパス通路を介して循環するようにな
る。このとき、ヒートポンプのコンプレッサが運転され
ることにより、車室側熱交換器を流通する冷媒の熱によ
り車室内は迅速に暖房が行われ、また、そのヒートポン
プの冷媒が冷却水加熱用熱交換器を流通する際に冷却水
循環路を流通する冷却水を加熱するようになる。これに
より、デフロスタを流通する冷却水の温度は迅速に上昇
されるようになり、もってデフロスタの機能も迅速に立
ち上げることができるようになる。According to the vehicle air conditioner of the present invention, for example, the temperature of the cooling water is still low immediately after the vehicle driving engine is driven, and when the heating operation is started in this state, The control means, the detection signal of the temperature of the cooling water from the temperature detection means is below a predetermined temperature,
The valve device in the bypass passage is drive-controlled to an open state. As a result, the cooling water flowing through the cooling water circulation passage avoids the vehicle driving engine and circulates through the bypass passage. At this time, by operating the compressor of the heat pump, the heat of the refrigerant flowing through the heat exchanger on the passenger compartment side quickly heats the passenger compartment, and the refrigerant of the heat pump heats the coolant for heating the cooling water. The cooling water flowing through the cooling water circulation path is heated when the cooling water is distributed. As a result, the temperature of the cooling water flowing through the defroster can be quickly raised, and thus the function of the defroster can be quickly raised.
【０００８】[0008]
【実施例】以下、本発明をバス車両の空調装置に適用し
た場合の一実施例について、図面を参照しながら説明す
る。すなわち、全体構成の概略を示す図１において、バ
ス車両１（図２参照）を駆動する車両駆動用エンジン２
には、内部で冷却に供されて加熱された冷却水を冷却す
るための冷却水循環路３ａ，３ｂが配設されている。冷
却水循環路３ａは、放熱用のラジエータ４を介して冷却
水が循環する経路であり、冷却水循環路３ｂは、ウォー
ターポンプ５，デフロスタ６，電磁弁７および温水ヒー
タ８を介して冷却水が循環する経路である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment in which the present invention is applied to an air conditioner for a bus vehicle will be described below with reference to the drawings. That is, in FIG. 1 showing an outline of the entire configuration, a vehicle drive engine 2 for driving a bus vehicle 1 (see FIG. 2).
Is provided with cooling water circulation paths 3a and 3b for cooling the cooling water that is internally cooled and heated. The cooling water circulation path 3a is a path through which cooling water circulates via the radiator 4 for heat dissipation, and the cooling water circulation path 3b circulates cooling water through the water pump 5, the defroster 6, the solenoid valve 7 and the hot water heater 8. It is a route to do.
【０００９】そして、冷却水循環路３ｂには車両駆動用
エンジン２をバイパスして流通するためのバイパス通路
９が設けられており、そのバイパス通路９には弁装置と
しての電磁弁１０が設けられている。また、冷却水循環
路３ｂには、デフロスタ６の出口側に電磁弁１１を介し
て冷却水加熱用熱交換器１２が接続されており、こちら
にも冷却水が循環可能に経路が設けられている。また、
車両駆動用エンジン２への冷却水循環路３ａ，３ｂの出
入口近傍には冷却水の温度を検出する温度検出手段とし
ての水温センサ１３，１３が配設されている。A bypass passage 9 for bypassing and circulating the vehicle driving engine 2 is provided in the cooling water circulation passage 3b, and an electromagnetic valve 10 as a valve device is provided in the bypass passage 9. There is. Further, a cooling water heating heat exchanger 12 is connected to the cooling water circulation path 3b on the outlet side of the defroster 6 via an electromagnetic valve 11, and a path is also provided here so that the cooling water can circulate. . Also,
Water temperature sensors 13, 13 as temperature detecting means for detecting the temperature of the cooling water are arranged near the entrances and exits of the cooling water circulation paths 3a, 3b to the vehicle driving engine 2.
【００１０】一方、ヒートポンプ１４は、冷媒循環路１
５中に、コンプレッサ１６，四方弁１７，車室内側熱交
換器１８，冷却水加熱用熱交換器１２，膨張弁１９，車
室外側熱交換器２０，冷媒加熱器２１およびアキュムレ
ータ２２を順に設けてなるものである。そしてヒートポ
ンプ１４は、四方弁１７が図示の流路に切り替えられて
いる状態で、冷媒循環路１５中を循環する冷媒により、
車室内側熱交換器１８により車室１ａ内の暖房を行うと
共に、冷却水加熱用熱交換器１２により熱交換を行って
冷却水を加熱するようになっている。On the other hand, the heat pump 14 includes the refrigerant circulation path 1
5, a compressor 16, a four-way valve 17, a vehicle interior side heat exchanger 18, a cooling water heating heat exchanger 12, an expansion valve 19, a vehicle exterior heat exchanger 20, a refrigerant heater 21 and an accumulator 22 are provided in order. It will be. Then, the heat pump 14 uses the refrigerant circulating in the refrigerant circulation path 15 while the four-way valve 17 is switched to the illustrated flow path,
The vehicle interior side heat exchanger 18 heats the interior of the vehicle interior 1a, and the cooling water heating heat exchanger 12 performs heat exchange to heat the cooling water.
【００１１】空調用エンジン２３は、ヒートポンプ１４
のコンプレッサ１６を図示しない電磁クラッチを介して
駆動すると共に、室外ファン２４および伝達機構２５を
介して連結された室内ファン２６を回転駆動するように
なっている。空調用エンジン２３に設けられた冷却水循
環路２７には、ラジエータ２８および冷媒加熱器２１が
順に設けられており、図示しない弁装置により流路を切
換え可能な構成となっている。また、室外ファン２４
は、ラジエータ２８および車室外側熱交換器２０に送風
するようになっており、室内ファン２６は、送風ダクト
２９に設けられた温水ヒータ８および車室内側熱交換器
１８を介して車室１ａ内部に送風するようになってい
る。The air conditioning engine 23 includes a heat pump 14
The compressor 16 is driven via an electromagnetic clutch (not shown), and the indoor fan 26 connected via the outdoor fan 24 and the transmission mechanism 25 is rotationally driven. A radiator 28 and a refrigerant heater 21 are sequentially provided in a cooling water circulation path 27 provided in the air conditioning engine 23, and the flow path can be switched by a valve device (not shown). In addition, the outdoor fan 24
Is blown to the radiator 28 and the heat exchanger 20 outside the passenger compartment, and the indoor fan 26 is connected to the passenger compartment 1a via the hot water heater 8 and the heat exchanger 18 on the passenger compartment side provided in the air duct 29. It is designed to blow air inside.
【００１２】さて、制御手段としての制御回路３０は、
後述する制御プログラムがあらかじめ記憶されたもの
で、前述の温度センサ１３，１３から検出温度信号が与
えられるようになっており、その検出温度信号に基いて
ヒートポンプ１４の運転制御および前述の電磁弁７，１
０，１１に開閉の駆動制御を行うようになっている。Now, the control circuit 30 as the control means is
A control program, which will be described later, is stored in advance, and a detected temperature signal is given from the temperature sensors 13 and 13 described above. Based on the detected temperature signal, operation control of the heat pump 14 and the solenoid valve 7 are performed. , 1
Opening and closing drive control is performed at 0 and 11.
【００１３】次に、バス車両１の全体の外観を示す図２
において、前述の温水ヒータ８および車室内側熱交換器
１８を介して加熱された空気は、車室１ａ内に配設され
た配風ダクト３１に送られ、配風ダクト３１に設けられ
た多数の吹出口３１ａから各座席の上部および下部から
送風されるようになっている。また、デフロスタ６は、
図示しないファンにより温風を吹き出して車室１ａ内側
のガラスの曇りを晴らすもので、車室１ａのフロントガ
ラス１ｂに向けて温風を吹き出すフロントデフロスタ６
ａおよびサイドガラス１ｃに向けて温風を吹き出すサイ
ドデフロスタ６ｂなどから構成されている（図３参
照）。Next, FIG. 2 showing the overall appearance of the bus vehicle 1
In the above, the air heated via the above-mentioned hot water heater 8 and the vehicle interior side heat exchanger 18 is sent to the air distribution duct 31 arranged in the vehicle interior 1 a, and a large number of air distribution ducts 31 are provided in the air distribution duct 31. The air is blown from the upper and lower parts of each seat from the air outlet 31a. Also, the defroster 6 is
The front defroster 6 blows out warm air by a fan (not shown) to clear the glass inside the cabin 1a and blows out warm air toward the windshield 1b of the cabin 1a.
a and a side defroster 6b that blows out warm air toward the side glass 1c (see FIG. 3).
【００１４】次に本実施例の作用について、図４ないし
図６をも参照して説明する。まず、暖房運転のスイッチ
が操作されると、制御回路３０は図４に示す空調制御プ
ログラムのフローチャートに従って制御を開始（スター
ト）する。制御回路３０は、まず、ステップＳ１におい
て、温度センサ１３，１３から温度検出信号を入力し、
車両駆動用エンジン２を循環する冷却水の検出温度Ｔの
値を演算する。Next, the operation of this embodiment will be described with reference to FIGS. 4 to 6. First, when the heating operation switch is operated, the control circuit 30 starts control according to the flowchart of the air conditioning control program shown in FIG. The control circuit 30 first inputs the temperature detection signals from the temperature sensors 13 and 13 in step S1,
The value of the detected temperature T of the cooling water circulating through the vehicle driving engine 2 is calculated.
【００１５】続いて、制御回路３０は、ステップＳ２に
進んで、検出温度Ｔの値が所定の水温Ｔｗ以上か否かを
判断する。この水温Ｔｗの値は、外気温度が低く車両駆
動用エンジン２の始動直後などで、冷却水の温度が低過
ぎて冷却水の熱のみでは暖房運転が十分に行えなくなる
温度として設定されている。そして、検出温度Ｔの値が
低い場合には、制御回路３０は、ステップＳ２で「Ｎ
Ｏ」と判断してステップＳ３に移行する。Subsequently, the control circuit 30 proceeds to step S2 to judge whether or not the value of the detected temperature T is equal to or higher than a predetermined water temperature Tw. The value of the water temperature Tw is set as a temperature at which the temperature of the cooling water is too low and the heating operation cannot be sufficiently performed only by the heat of the cooling water immediately after the vehicle driving engine 2 is started, when the outside air temperature is low. Then, when the value of the detected temperature T is low, the control circuit 30 sets "N" in step S2.
When it is determined to be "O", the process proceeds to step S3.
【００１６】制御回路３０は、ステップＳ３で、ヒート
ポンプ１４のコンプレッサ１６を駆動し、同時に、電磁
弁１０および１１を開状態に、電磁弁７を閉状態に駆動
制御する。この場合、ヒートポンプ１４が運転される
と、冷媒循環路１５中の冷媒は、コンプレッサ１６によ
り圧縮されて高温高圧状態で四方弁１７を介した後、車
室内側熱交換器１８および冷却水加熱用熱交換器１２に
て熱交換を行い、この後、膨張弁１９，車室外側熱交換
器２０，冷媒加熱器２１，アキュムレータ２２を介して
再びコンプレッサ１６に戻る経路で循環する。At step S3, the control circuit 30 drives the compressor 16 of the heat pump 14 and simultaneously controls the solenoid valves 10 and 11 to be in the open state and the solenoid valve 7 to be in the closed state. In this case, when the heat pump 14 is operated, the refrigerant in the refrigerant circulation path 15 is compressed by the compressor 16 and passes through the four-way valve 17 in a high-temperature and high-pressure state, and then, the heat exchanger 18 and the cooling water for heating the passenger compartment side The heat is exchanged in the heat exchanger 12, and thereafter, the heat is circulated through a path returning to the compressor 16 again via the expansion valve 19, the vehicle exterior heat exchanger 20, the refrigerant heater 21, and the accumulator 22.
【００１７】一方、冷却水循環路３ａ中の冷却水は、図
５に実線の矢印で示すように、車両駆動用エンジン２を
通らず、バイパス通路９，ウォーターポンプ５，デフロ
スタ６，電磁弁１１，冷却水加熱用熱交換器１２を順に
介して再びバイパス通路９に至る経路で循環するように
なる。On the other hand, the cooling water in the cooling water circulation path 3a does not pass through the vehicle driving engine 2 as shown by the solid arrow in FIG. 5, but bypass passage 9, water pump 5, defroster 6, solenoid valve 11, The cooling water is circulated through the heat exchanger 12 for heating the cooling water in order to reach the bypass passage 9 again.
【００１８】これにより、ヒートポンプ１４の車室内側
熱交換器１８に循環する高温高圧の冷媒は室内ファン２
６により送風された空気と熱交換を行うようになり、も
って車室１ａ内に温風を供給して暖房を行うようにな
る。また、冷却水加熱用熱交換器１２に循環する冷媒は
冷却水循環路３ｂの冷却水と熱交換を行い、デフロスタ
６に循環する冷却水を加熱昇温するようになるので、デ
フロスタ６から温風を吹き出すことができる。この結
果、車室１ａ内の暖房を迅速に立上げることができると
共に、デフロスタ６によるデフロスト機能も迅速に立上
げることができるようになる。As a result, the high-temperature and high-pressure refrigerant circulated in the heat exchanger 18 on the passenger compartment side of the heat pump 14 is cooled by the indoor fan 2.
Heat is exchanged with the air blown by 6, and thus warm air is supplied into the vehicle interior 1a for heating. Further, the refrigerant circulating in the heat exchanger 12 for heating the cooling water exchanges heat with the cooling water in the cooling water circulation passage 3b to heat up the temperature of the cooling water circulating in the defroster 6, so that the hot air from the defroster 6 is heated. Can be blown out. As a result, the heating of the vehicle interior 1a can be quickly started up, and the defrost function of the defroster 6 can be quickly started up.
【００１９】この後、制御回路３０は、ステップＳ１に
戻り、温度センサ１３，１３からの温度検出信号を入力
して、以下、ステップＳ２およびＳ３を繰り返すことに
より、ヒートポンプ１４の運転を継続する。そして、こ
の後、冷却水の温度が上昇してきて温度センサ１３，１
３の検出温度Ｔが設定温度Ｔｗ以上になると、制御回路
３０は、ステップＳ２で「ＹＥＳ」と判断してステップ
Ｓ４に移行するようになる。After that, the control circuit 30 returns to step S1, inputs the temperature detection signals from the temperature sensors 13 and 13, and then repeats steps S2 and S3 to continue the operation of the heat pump 14. After this, the temperature of the cooling water rises and the temperature sensors 13, 1
When the detected temperature T of 3 becomes equal to or higher than the set temperature Tw, the control circuit 30 determines “YES” in step S2 and shifts to step S4.
【００２０】制御回路３０は、ステップＳ４で、コンプ
レッサ１６の運転を停止すると共に、電磁弁１０および
１１を閉状態，電磁弁７を開状態に駆動制御し、続いて
ステップＳ５に進んで通常の暖房運転を実施するように
なる。この場合、温度センサ１３，１３の検出温度Ｔが
設定温度Ｔｗ以上に達しているということは、車両駆動
用エンジン２の冷却水の温度が十分に上昇しており、ヒ
ートポンプ１４を停止しても冷却水の廃熱で暖房運転が
十分に行えることを示している状態である。In step S4, the control circuit 30 stops the operation of the compressor 16 and controls the solenoid valves 10 and 11 to be in the closed state and the solenoid valve 7 to be in the open state, and then proceeds to step S5 to perform a normal operation. Start heating operation. In this case, the fact that the temperature T detected by the temperature sensors 13, 13 has reached the set temperature Tw or higher means that the temperature of the cooling water for the vehicle driving engine 2 has risen sufficiently and the heat pump 14 is stopped. This is a state showing that the heating operation can be sufficiently performed by the waste heat of the cooling water.
【００２１】電磁弁１０，１１が閉状態とされ、電磁弁
７が開状態とされることにより、冷却水循環路３ｂの冷
却水は、車両駆動用エンジン２からウォーターポンプ
５，デフロスタ６，電磁弁７，温水ヒータ８を介して車
両駆動用エンジン２に戻る経路で循環するようになる
（図５中破線の矢印で示す）。このとき、デフロスタ６
および温水ヒータ８に循環する冷却水の温度は十分高く
なっているので、デフロスト機能および車室１ａ内の暖
房機能は十分達成できるようになる。When the solenoid valves 10 and 11 are closed and the solenoid valve 7 is opened, the cooling water in the cooling water circulation passage 3b is supplied from the vehicle driving engine 2 to the water pump 5, the defroster 6 and the electromagnetic valve. 7. The water is circulated on the route returning to the vehicle driving engine 2 via the hot water heater 8 (indicated by a dashed arrow in FIG. 5). At this time, defroster 6
Since the temperature of the cooling water circulated in the hot water heater 8 is sufficiently high, the defrost function and the heating function in the vehicle interior 1a can be sufficiently achieved.
【００２２】なお、制御回路３０は、ステップＳ５で
は、通常暖房運転として冷却水循環路３ｂを循環する冷
却水の熱を利用してデフロスト機能および暖房運転を行
う制御を図示しない設定温度に応じて実施し、以下、ス
テップＳ１，Ｓ２，Ｓ４およびＳ５を繰り返すことによ
り、冷却水の温度を検出しながら通常暖房運転を行うよ
うになる。In step S5, the control circuit 30 performs control for performing the defrost function and the heating operation by utilizing the heat of the cooling water circulating in the cooling water circulation path 3b as the normal heating operation according to a set temperature (not shown). Then, by repeating steps S1, S2, S4, and S5, the normal heating operation is performed while detecting the temperature of the cooling water.
【００２３】そして、このような通常暖房運転中に、外
気温度が急激に低下するなどで冷却水の温度が所定温度
Ｔｗよりも低くなったときには、制御回路３０は、ステ
ップＳ２で「ＮＯ」と判断して再びステップＳ３を実行
し、デフロスト機能および暖房運転の性能が低下するの
を防止するようになる。When the temperature of the cooling water becomes lower than the predetermined temperature Tw due to a sudden decrease in the outside air temperature during the normal heating operation, the control circuit 30 returns "NO" in step S2. The determination is made and step S3 is executed again to prevent the performance of the defrost function and the heating operation from decreasing.
【００２４】図６は、このようにヒートポンプ１４を用
いて暖房運転の立ち上がり時の性能を向上させた場合の
冷却水の温度の推移を曲線Ａ（図中太実線）で示したも
ので、これは、予熱機を用いた場合と略同等の特性とな
っている。また、通常昇温の場合の曲線Ｂ（図中細実
線）に比べて改善されており、さらに、冷却水加熱用熱
交換器１２を用いない場合の曲線Ｃ（図中破線）で示す
立ち上がり特性に比べると大きく改善されていることが
わかる。FIG. 6 is a curve A (thick solid line in the figure) showing the transition of the temperature of the cooling water when the performance at the start of the heating operation is improved by using the heat pump 14 as described above. Has substantially the same characteristics as when a preheater is used. Further, it is improved compared to the curve B (thin solid line in the figure) in the case of normal temperature rise, and further, the rising characteristic shown by the curve C (broken line in the figure) when the heat exchanger 12 for cooling water heating is not used. It can be seen that it is greatly improved compared to.
【００２５】このような本実施例によれば、冷却水加熱
用熱交換器１２，バイパス通路９および電磁弁７，１
０，１１を設けて、制御回路３０により、車両駆動用エ
ンジン２を循環する冷却水の温度が所定温度Ｔｗよりも
低いときには、ヒートポンプ１４を用いて迅速に暖房運
転を行うと共に、デフロスタ６に循環する冷却水循環路
３ｂの冷却水を車両駆動用エンジン２をバイパスした経
路で流通させ、且つ冷却水加熱用熱交換器１２で加熱す
るようにしたので、デフロスト機能も迅速に立ち上げる
ことができる。According to the present embodiment as described above, the heat exchanger 12 for heating the cooling water, the bypass passage 9 and the solenoid valves 7, 1 are provided.
When the temperature of the cooling water circulating through the vehicle drive engine 2 is lower than the predetermined temperature Tw, the control circuit 30 is provided with 0 and 11 to quickly perform the heating operation using the heat pump 14 and circulate it to the defroster 6. Since the cooling water in the cooling water circulation path 3b is circulated in the path bypassing the vehicle drive engine 2 and is heated by the cooling water heating heat exchanger 12, the defrost function can be quickly started.
【００２６】なお、上記実施例においては、冷却水加熱
用熱交換器１２を用いて冷却水循環路３ｂの冷却水を加
熱するようにしたが、これに限らず、冷却水加熱用熱交
換器１２を用いずにその機能を温水ヒータ８により兼ね
備える構成とすることもできる。すなわち、ヒートポン
プ１４の運転時に、冷却水を温水ヒータ８に導き、ヒー
トポンプ１４の車室内側熱交換器１８との間で熱交換を
行うことにより、温水ヒータ８を流通する冷却水を加熱
することもできる。In the above embodiment, the cooling water heating heat exchanger 12 is used to heat the cooling water in the cooling water circulation passage 3b. However, the present invention is not limited to this, and the cooling water heating heat exchanger 12 is not limited thereto. Alternatively, the hot water heater 8 may have the same function without using. That is, when the heat pump 14 is in operation, the cooling water is guided to the hot water heater 8 and heat is exchanged with the heat exchanger 18 on the passenger compartment side of the heat pump 14 to heat the cooling water flowing through the hot water heater 8. You can also
【００２７】[0027]
【発明の効果】以上説明したように、本発明の車両用空
調装置によれば、弁装置を有するバイパス通路を設け、
車両駆動用エンジンの冷却水の温度が所定温度以下であ
るときに、制御手段により冷却水循環路の冷却水をバイ
パス通路を介して循環すると共に冷却水加熱用熱交換器
にてヒートポンプの冷媒と熱交換を行って加熱するよう
にしたので、暖房の立ち上がり特性を向上させると共
に、冷却水の熱で温風を吹き出すデフロスト機能も迅速
に立ち上げることができるという優れた効果を奏する。As described above, according to the vehicle air conditioner of the present invention, the bypass passage having the valve device is provided,
When the temperature of the cooling water for the vehicle driving engine is below a predetermined temperature, the control means circulates the cooling water in the cooling water circulation path through the bypass passage and heats the refrigerant of the heat pump with the heat pump refrigerant in the cooling water heating heat exchanger. Since the heating is performed by exchanging the heat exchanger, it has an excellent effect that the rising characteristic of the heating is improved and the defrost function of blowing out warm air by the heat of the cooling water can be quickly started.
【図１】本発明の一実施例を示す全体構成の概略図FIG. 1 is a schematic diagram of an overall configuration showing an embodiment of the present invention.
【図２】要部を透視して示すバス車両の外観斜視図FIG. 2 is an external perspective view of a bus vehicle showing a main part in a see-through manner.
【図３】デフロスタの外観図[Fig. 3] External view of the defroster
【図４】制御プログラムのフローチャートFIG. 4 is a flowchart of a control program
【図５】冷却水の循環状態を示す作用説明図FIG. 5 is an operation explanatory view showing a circulating state of cooling water.
【図６】特性比較図FIG. 6 Comparison of characteristics
１ａは車室、２は車両駆動用エンジン、３ａ，３ｂは冷
却水循環路、５はウォーターポンプ、６はデフロスタ、
７は電磁弁、８は温水ヒータ、９はバイパス通路、１０
は電磁弁（弁装置）、１１は電磁弁、１２は冷却水加熱
用熱交換器、１３は水温センサ（温度検出手段）、１４
はヒートポンプ、１５は冷媒循環路、１６はコンプレッ
サ、１７は四方弁、１８は車室内側熱交換器、２３は空
調用エンジン、２６は室内ファン、３０は制御回路（制
御手段）である。1a is a passenger compartment, 2 is a vehicle driving engine, 3a and 3b are cooling water circulation paths, 5 is a water pump, 6 is a defroster,
7 is a solenoid valve, 8 is a hot water heater, 9 is a bypass passage, 10
Is a solenoid valve (valve device), 11 is a solenoid valve, 12 is a heat exchanger for heating cooling water, 13 is a water temperature sensor (temperature detection means), 14
Is a heat pump, 15 is a refrigerant circulation path, 16 is a compressor, 17 is a four-way valve, 18 is a heat exchanger on the vehicle interior side, 23 is an air conditioning engine, 26 is an indoor fan, and 30 is a control circuit (control means).
Claims (1)
一部が流通する冷却水循環路と、 この冷却水循環路に設けられその冷却水の放熱により車
室内を暖房するための温水ヒータと、 前記冷却水循環路に設けられ前記冷却水の放熱により車
室の窓の曇りを取るためのデフロスタと、 コンプレッサにより冷媒を循環させることによりその冷
媒循環路中の車室内側熱交換器から放熱させて前記車室
内を暖房するヒートポンプと、 弁装置の開状態で前記冷却水循環路を流通する冷却水を
前記車両駆動用エンジンをバイパスさせるバイパス通路
と、 前記ヒートポンプの冷媒の放熱により前記冷却水循環路
中の冷却水を加熱する冷却水加熱用熱交換器と、 前記車両駆動用エンジンの冷却水の温度を検出する温度
検出手段と、 暖房運転開始時に前記温度検出手段により検出された前
記冷却水の温度が所定温度以下のときに、前記弁装置を
開状態に駆動制御する制御手段とを具備したことを特徴
とする車両用空調装置。1. A cooling water circulation passage through which a part of cooling water for cooling a vehicle driving engine flows, a hot water heater provided in the cooling water circulation passage for heating the passenger compartment by radiating the cooling water, A defroster is provided in the cooling water circulation path for removing the fog on the windows of the vehicle compartment by radiating the cooling water, and a refrigerant is circulated by a compressor to radiate heat from the vehicle interior side heat exchanger in the refrigerant circulation path. A heat pump for heating the interior of the vehicle, a bypass passage for bypassing the cooling water circulating in the cooling water circulation passage to the vehicle driving engine when the valve device is open, and a cooling in the cooling water circulation passage by radiating heat from the heat pump refrigerant. A heat exchanger for heating the cooling water for heating water; a temperature detecting means for detecting the temperature of the cooling water for the engine for driving the vehicle; When the temperature of the cooling water detected by the detection means is below a predetermined temperature, air conditioning system, characterized by comprising a control means for driving and controlling the valve device in the open state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34202792A JP3116614B2 (en) | 1992-12-22 | 1992-12-22 | Vehicle air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP34202792A JP3116614B2 (en) | 1992-12-22 | 1992-12-22 | Vehicle air conditioner |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06183249A true JPH06183249A (en) | 1994-07-05 |
| JP3116614B2 JP3116614B2 (en) | 2000-12-11 |
Family
ID=18350615
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP34202792A Expired - Fee Related JP3116614B2 (en) | 1992-12-22 | 1992-12-22 | Vehicle air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3116614B2 (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08310227A (en) * | 1995-05-23 | 1996-11-26 | Nippondenso Co Ltd | Air conditioner for vehicle |
| JPH11170848A (en) * | 1997-12-16 | 1999-06-29 | Nissan Motor Co Ltd | Hybrid vehicle air conditioner |
| US7069983B2 (en) | 2002-12-06 | 2006-07-04 | Matsushita Electric Industrial Co., Ltd. | Air conditioner |
| JP2011117716A (en) * | 2009-11-04 | 2011-06-16 | Valeo Systemes Thermiques | Heat exchanger including at least three heat exchange section, and heat energy management system including the same |
| KR101328770B1 (en) * | 2007-03-28 | 2013-11-13 | 엘지전자 주식회사 | A reheating dehumidification system for refrigerator |
| CN104228523A (en) * | 2014-09-15 | 2014-12-24 | 昆山格天美治农机设备有限公司 | Agricultural vehicle warming device |
| JP2015001339A (en) * | 2013-06-17 | 2015-01-05 | カルソニックカンセイ株式会社 | Cooling device |
| DE112015003371B4 (en) | 2014-07-23 | 2022-03-24 | Denso Corporation | Vehicle Air Conditioning Device |
-
1992
- 1992-12-22 JP JP34202792A patent/JP3116614B2/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08310227A (en) * | 1995-05-23 | 1996-11-26 | Nippondenso Co Ltd | Air conditioner for vehicle |
| JPH11170848A (en) * | 1997-12-16 | 1999-06-29 | Nissan Motor Co Ltd | Hybrid vehicle air conditioner |
| US7069983B2 (en) | 2002-12-06 | 2006-07-04 | Matsushita Electric Industrial Co., Ltd. | Air conditioner |
| KR101328770B1 (en) * | 2007-03-28 | 2013-11-13 | 엘지전자 주식회사 | A reheating dehumidification system for refrigerator |
| JP2011117716A (en) * | 2009-11-04 | 2011-06-16 | Valeo Systemes Thermiques | Heat exchanger including at least three heat exchange section, and heat energy management system including the same |
| JP2015001339A (en) * | 2013-06-17 | 2015-01-05 | カルソニックカンセイ株式会社 | Cooling device |
| DE112015003371B4 (en) | 2014-07-23 | 2022-03-24 | Denso Corporation | Vehicle Air Conditioning Device |
| CN104228523A (en) * | 2014-09-15 | 2014-12-24 | 昆山格天美治农机设备有限公司 | Agricultural vehicle warming device |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3116614B2 (en) | 2000-12-11 |
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|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |