JPS6231653B2 - - Google Patents
Info
- Publication number
- JPS6231653B2 JPS6231653B2 JP56025088A JP2508881A JPS6231653B2 JP S6231653 B2 JPS6231653 B2 JP S6231653B2 JP 56025088 A JP56025088 A JP 56025088A JP 2508881 A JP2508881 A JP 2508881A JP S6231653 B2 JPS6231653 B2 JP S6231653B2
- Authority
- JP
- Japan
- Prior art keywords
- compressor
- temperature
- resistor
- turned
- level
- 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.)
- Expired
Links
Classifications
-
- 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 devices
- B60H1/32—Cooling devices
- B60H1/3204—Cooling devices using compression
Landscapes
- Physics & Mathematics (AREA)
- Thermal Sciences (AREA)
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
Description
【発明の詳細な説明】
本発明は車輛用空気調和装置、特に車輛の速度
に応じてコンプレツサを最適な状態に制御するよ
うにした車輛用空気調和装置に関するものであ
る。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a vehicle air conditioner, and more particularly to a vehicle air conditioner that controls a compressor to an optimal state depending on the speed of the vehicle.
一般に車輛用空気調和装置は、コンプレツサに
より冷却されるエバポレータと、ヒータコアと、
冷風と暖風との混合割合を調整するエアミツクス
ドアとを有し、さらに上記エバポレータの表面温
度又はその近傍の温度が所定の値まで低下したと
きにコンプレツサをオフとして、エバポレータの
凍結を防止しかつエバポレータを最適な温度に制
御するようにした制御回路を具備している。一
方、上記コンプレツサはエンジンの回転数を伝達
するマグネツトクラツチにより制御され、エンジ
ンの回転数が高くなり車輛が高速運転となると、
コンプレツサの冷媒流量が多くなるためエバポレ
ータの冷却が速くなる。このために、上記エバポ
レータ側の温度を検出してコンプレツサをオン・
オフ駆動する制御回路に基づくコンプレツサのオ
ン・オフ周期が短かくなつてコンプレツサが頻繁
にオン・オフし、これによりマグネツトクラツチ
の耐久性が悪化するとともに、高速運転時におけ
るドライバーの運転感覚に影響を与えてしまう欠
点を有していた。 Generally, a vehicle air conditioner includes an evaporator cooled by a compressor, a heater core,
It has an air mix door that adjusts the mixing ratio of cold air and warm air, and further includes an air mix door that turns off the compressor when the surface temperature of the evaporator or the temperature in the vicinity thereof falls to a predetermined value to prevent the evaporator from freezing and to prevent the evaporator from freezing. It is equipped with a control circuit that controls the temperature to the optimum temperature. On the other hand, the compressor is controlled by a magnetic clutch that transmits the engine speed, and when the engine speed increases and the vehicle is driven at high speed,
Cooling of the evaporator becomes faster because the refrigerant flow rate of the compressor increases. For this purpose, the temperature on the evaporator side is detected and the compressor is turned on.
The on/off cycle of the compressor based on the off-drive control circuit becomes shorter, causing the compressor to turn on and off more frequently, which deteriorates the durability of the magnetic clutch and affects the driver's driving sensation when driving at high speeds. It had the disadvantage of giving
本発明の目的は車速に応じて、コンプレツサを
制御する制御回路の動作レベルを調整することに
より、上記欠点を除去するものであり、以下実施
例を用いて詳細に説明する。 An object of the present invention is to eliminate the above-mentioned drawbacks by adjusting the operating level of a control circuit for controlling a compressor according to the vehicle speed, and will be described in detail below using embodiments.
第１図は本発明による車輛用空気調和装置の一
実施例を示す回路図であり、同図において、１は
演算増幅器であり、この演算増幅器１の正帰還回
路Ｐには抵抗２が接続され、さらにこの抵抗２に
はアナログスイツチ４を介して抵抗３が並列に接
続され、これら抵抗２，３および常閉のアナログ
スイツチ４によりフイードバツク制御回路５が構
成される。上記演算増幅器１の反転入力側には抵
抗６と可変抵抗７との接続点電圧V1が抵抗８を
介して供給され、また、その非反転入力側には抵
抗９と温度センサ１０との接続点電圧V2が抵抗
１１を介して供給され、その出力電圧は抵抗１２
を介してPNP型トランジスタ１３のベース側に供
給され、上記トランジスタ１３はコンプレツサを
駆動するマグネツトクラツチ１４に接続される。
上記フイードバツク制御回路５を構成するアナロ
グスイツチ４は演算増幅器１５の出力により制御
されるもので、この演算増幅器１５の反転入力側
には車速検出回路１６からの出力が抵抗１７を介
して供給され、またその非反転入力側には抵抗１
８と抵抗１９との接続点電圧が抵抗２０を介して
供給される。この演算増幅器１５の出力は車輛の
速度が速くなつて車速検出回路１６からの出力が
上昇して抵抗１８と１９との接続点から得られる
基準電圧よりも大きくなることに基づき、Ｌレベ
ルとなりこれによりアナログスイツチ４は常閉で
あるのでオン状態となるが、車速が遅くなり、車
速検出回路１６からの出力が小さくなつて抵抗１
８と抵抗１９との接続点電圧よりも小さくなる
と、その出力がＨレベルとなるのでアナログスイ
ツチ４はオフとなる。すなわち、車速が一定値以
上の場合は抵抗２に対し抵抗３が接続された状態
となり帰還電圧が大となり、また、車速が一定レ
ベル以下の場合は抵抗３が除去された状態とな
り、その帰還電圧が小となり、このようにして演
算増幅器１に対するデフアレンシヤルが制御され
る。 FIG. 1 is a circuit diagram showing an embodiment of a vehicle air conditioner according to the present invention. In the figure, 1 is an operational amplifier, and a resistor 2 is connected to a positive feedback circuit P of the operational amplifier 1. Further, a resistor 3 is connected in parallel to this resistor 2 via an analog switch 4, and a feedback control circuit 5 is constituted by these resistors 2, 3 and the normally closed analog switch 4. The voltage V 1 at the connection point between the resistor 6 and the variable resistor 7 is supplied to the inverting input side of the operational amplifier 1 via the resistor 8, and the connection point between the resistor 9 and the temperature sensor 10 is supplied to the non-inverting input side. A point voltage V 2 is supplied through a resistor 11, and its output voltage is supplied through a resistor 12.
is supplied to the base side of a PNP type transistor 13, which is connected to a magnetic clutch 14 which drives a compressor.
The analog switch 4 constituting the feedback control circuit 5 is controlled by the output of an operational amplifier 15, and the output from the vehicle speed detection circuit 16 is supplied to the inverting input side of the operational amplifier 15 via a resistor 17. Also, there is a resistor on the non-inverting input side.
A voltage at the connection point between 8 and resistor 19 is supplied via resistor 20 . The output of the operational amplifier 15 becomes L level because the speed of the vehicle increases and the output from the vehicle speed detection circuit 16 increases and becomes larger than the reference voltage obtained from the connection point between the resistors 18 and 19. Since the analog switch 4 is normally closed, it turns on, but as the vehicle speed slows down, the output from the vehicle speed detection circuit 16 decreases, and the resistor 1
When the voltage becomes smaller than the voltage at the connection point between the analog switch 8 and the resistor 19, its output becomes H level, and the analog switch 4 is turned off. In other words, when the vehicle speed is above a certain value, resistor 3 is connected to resistor 2, and the feedback voltage becomes large; when the vehicle speed is below a certain level, resistor 3 is removed, and the feedback voltage increases. becomes small, and in this way the differential for operational amplifier 1 is controlled.
以上の構成の車輛用空気調和装置の動作を以下
説明すると、まずコンプレツサが駆動することに
基づきエバポレータが冷却され、その表面又は近
傍の温度が低下すると温度センサ１０の抵抗値が
次第に大きくなり、電圧V2が次第に大きくなつ
て電圧V1を超えると演算増幅器１の出力はＨレ
ベルとなるのでトランジスタ１３がオフとなりマ
グネツトクラツチ１４が消勢されてコンプレツサ
がオフとなる。コンプレツサがオフされることに
より、エバポレータの表面又はその近傍の温度が
次第に上昇して電圧V2が次第に抵下し、電圧V2
が電圧V1よりも所定レベル低下したときに演算
増幅器１の出力がＬレベルとなつてトランジスタ
１３がオンとなり、これにより、マグネツトクラ
ツチ１４が励磁されてコンプレツサがオンとな
る。この場合第２図に示すようにコンプレツサが
オフとなる温度レベルH0とコンプレツサがオン
となる温度レベルＭとの区間Ｄは演算増幅器１の
帰還電圧の大きさによつて変化するものである。
ここで車輛の速度が低速のときは演算増幅器１５
の出力がＨレベルで、フイードバツク制御回路を
構成するアナログスイツチ４はオフとなつて、演
算増幅器１の帰還回路には抵抗２のみが接続され
ているが、車輛の速度が速くなると演算増幅器１
５の出力がＬレベルとなるのでアナログスイツチ
４がオンとなり抵抗２に対し抵抗３が並列に接続
され、帰還回路の抵抗は全体として小さくなるた
めに、帰還電圧が大きくなり、演算増幅器１の出
力がＨレベルのときその非反転入力側の電圧が引
き上げられる。従つて、演算増幅器１は温度が大
きく上昇し電圧V2が相当小さくならないとＬレ
ベル（コンプレツサオン）に反転しなくなる。こ
のことは、第２図に示すようにコンプレツサのオ
ンとなるレベルＭがM′としてエバポレータ側温
度の上昇方向にシフトされることになる。したが
つてコンプレツサはオフとなつた後、エバポレー
タの表面又はその近傍の温度が低速のときよりも
高い値にまで達しなければオンとならずこれによ
りコンプレツサのオフとなる時間が長くなり、ま
たオンとなる時間も長くなり、全体としてコンプ
レツサのオン・オフ周期が長くなる。このため
に、マグネツトクラツチ耐久性を向上させること
ができ、また、コンプレツサが頻繁にオン・オフ
することに基づき運転感覚に対し悪影響を及ぼす
ことがなくなり、さらにコンプレツサがオン・オ
フすることに基づいて発生するスイツチング音が
ドライバーの耳に入らず、ドライバーのフイーリ
ングを向上することもできる。 The operation of the vehicle air conditioner with the above configuration will be explained below. First, the evaporator is cooled based on the drive of the compressor. When the temperature on or near the surface of the evaporator decreases, the resistance value of the temperature sensor 10 gradually increases, and the voltage When V2 gradually increases and exceeds voltage V1 , the output of operational amplifier 1 becomes H level, transistor 13 is turned off, magnetic clutch 14 is deenergized, and the compressor is turned off. When the compressor is turned off, the temperature at or near the surface of the evaporator gradually increases, and the voltage V 2 gradually decreases, causing the voltage V 2 to decrease.
When the voltage drops to a predetermined level below the voltage V1 , the output of the operational amplifier 1 becomes L level and the transistor 13 is turned on, thereby energizing the magnetic clutch 14 and turning on the compressor. In this case, as shown in FIG. 2, the interval D between the temperature level H 0 at which the compressor is turned off and the temperature level M at which the compressor is turned on varies depending on the magnitude of the feedback voltage of the operational amplifier 1.
Here, when the speed of the vehicle is low, the operational amplifier 15
When the output of
5 becomes L level, analog switch 4 is turned on, resistor 3 is connected in parallel to resistor 2, and the resistance of the feedback circuit becomes smaller as a whole, so the feedback voltage increases and the output of operational amplifier 1 When is at H level, the voltage on its non-inverting input side is pulled up. Therefore, the operational amplifier 1 will not be inverted to the L level (compressor on) unless the temperature rises significantly and the voltage V2 becomes considerably small. This means that the level M at which the compressor is turned on is shifted as M' in the direction of increasing the temperature on the evaporator side, as shown in FIG. Therefore, after the compressor is turned off, the temperature at or near the surface of the evaporator must reach a higher value than at low speeds before it can be turned on again. The time for this becomes longer, and the on/off cycle of the compressor becomes longer as a whole. Therefore, the durability of the magnetic clutch can be improved, and the driving sensation is not adversely affected due to the compressor turning on and off frequently. The switching noise generated by the driver does not reach the driver's ears, and the driver's feeling can be improved.
以上説明したように本発明によれば、エバポレ
ータの表面又はその近傍の温度と基準レベルとを
比較しエバポレータの表面又はその近傍の温度が
第１温度レベルまで低下したときにコンプレツサ
をオフとし、かつエバポレータの表面又はその近
傍の温度が上昇し、上記第１温度レベルよりも所
定値高い第２温度レベルに達したときにコンプレ
ツサをオンとする制御回路を具備する車輛用空気
調和装置において、車輛検出回路を設け、この車
速検出回路の出力により上記制御回路を制御する
ようにして、第１温度レベルと第２温度レベルと
の差が大きくなるようにし、好ましくはコンプレ
ツサをオンとするレベルをエバポレータの表面又
はその近傍の温度における高温方向にシフトする
ようにしたので、コンプレツサがオン・オフとな
る周期を長くすることができ、マグネツトクラツ
チにかかる負担を軽減できる。 As explained above, according to the present invention, the temperature at or near the surface of the evaporator is compared with a reference level, and when the temperature at or near the surface of the evaporator falls to a first temperature level, the compressor is turned off, and In a vehicle air conditioning system that includes a control circuit that turns on a compressor when the temperature on or near the surface of the evaporator increases and reaches a second temperature level that is higher than the first temperature level by a predetermined value, A circuit is provided, and the control circuit is controlled by the output of the vehicle speed detection circuit, so that the difference between the first temperature level and the second temperature level becomes large, and preferably, the level at which the compressor is turned on is set to the level at which the compressor is turned on. Since the temperature at or near the surface is shifted toward higher temperatures, the cycle in which the compressor is turned on and off can be lengthened, and the load on the magnetic clutch can be reduced.
第１図は本発明による車輛用空気調和装置の電
気回路を示す回路図、第２図は本発明による車輛
用空気調和装置の動作を説明するための特性図で
ある。
１……演算増幅器、２，３……抵抗、４……ア
ナログスイツチ、１０……温度センサ、１３……
トランジスタ、１４……マグネツトクラツチ、１
６……車速検出回路。
FIG. 1 is a circuit diagram showing an electric circuit of a vehicle air conditioner according to the present invention, and FIG. 2 is a characteristic diagram for explaining the operation of the vehicle air conditioner according to the present invention. 1... operational amplifier, 2, 3... resistor, 4... analog switch, 10... temperature sensor, 13...
Transistor, 14...Magnetic clutch, 1
6...Vehicle speed detection circuit.
Claims (1)
の表面又はその近傍の温度が第１温度レベルまで
低下したときにコンプレツサをオフとし、上記温
度がこの第１温度レベルよりも所定値高い第２温
度レベルに達したときにコンプレツサをオンとす
る制御回路を具備する車輛用空気調和装置におい
て、車速検出回路を設けこの車速検出回路の出力
により上記制御回路を制御するようにして、車速
が速くなるときにおいて第１温度レベルと第２温
度レベルとの差が大きくなるようにしたことを特
徴とする車輛用空気調和装置。 ２ 制御回路を演算増幅器より構成し、この演算
増幅器の正帰還回路に接続された抵抗に対し並列
に抵抗を接続し、この並列に接続された抵抗の回
路にスイツチを設け車速検出回路の出力によりこ
のスイツチを制御するようにした特許請求の範囲
第１項記載の車輛用空気調和装置。[Claims] 1. When the temperature at or near the surface of the evaporator cooled by the compressor drops to a first temperature level, the compressor is turned off, and at a second temperature level where the temperature is higher than the first temperature level by a predetermined value, the compressor is turned off. In a vehicle air conditioner equipped with a control circuit that turns on a compressor when a temperature level is reached, a vehicle speed detection circuit is provided and the control circuit is controlled by the output of the vehicle speed detection circuit, thereby increasing the vehicle speed. An air conditioner for a vehicle, characterized in that the difference between a first temperature level and a second temperature level becomes large at times. 2 The control circuit is composed of an operational amplifier, a resistor is connected in parallel to the resistor connected to the positive feedback circuit of the operational amplifier, and a switch is provided in the circuit of the resistor connected in parallel to detect the output of the vehicle speed detection circuit. An air conditioner for a vehicle according to claim 1, wherein said switch is controlled.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56025088A JPS57140221A (en) | 1981-02-23 | 1981-02-23 | Air conditioner for vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP56025088A JPS57140221A (en) | 1981-02-23 | 1981-02-23 | Air conditioner for vehicle |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS57140221A JPS57140221A (en) | 1982-08-30 |
| JPS6231653B2 true JPS6231653B2 (en) | 1987-07-09 |
Family
ID=12156160
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP56025088A Granted JPS57140221A (en) | 1981-02-23 | 1981-02-23 | Air conditioner for vehicle |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS57140221A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5553262B2 (en) * | 2010-05-12 | 2014-07-16 | ダイハツ工業株式会社 | Air conditioner control device |
-
1981
- 1981-02-23 JP JP56025088A patent/JPS57140221A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS57140221A (en) | 1982-08-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPS6230686Y2 (en) | ||
| US4416324A (en) | Vehicle temperature control apparatus | |
| JPH0454051B2 (en) | ||
| EP0092195B1 (en) | Temperature control unit for vehicular air conditioning unit | |
| JPS6231653B2 (en) | ||
| JPS6241136B2 (en) | ||
| JPS582850B2 (en) | Shyariyouyoureibo Sochi | |
| JPS6238168B2 (en) | ||
| JPS6241130B2 (en) | ||
| JPH0320658B2 (en) | ||
| JPS5851049Y2 (en) | Temperature control device for vehicle cooling system | |
| JPH0143289Y2 (en) | ||
| JPS57160709A (en) | Air conditioning and refrigerating controller | |
| JPS6231650B2 (en) | ||
| JPS58105821A (en) | Controlling device of air conditioner for vehicle | |
| JPH0213205Y2 (en) | ||
| JPS6146017Y2 (en) | ||
| JPS6240812Y2 (en) | ||
| JP3167396B2 (en) | Intake door drive control device for automotive air conditioner | |
| JPH022663Y2 (en) | ||
| JPS5851383Y2 (en) | Air conditioner temperature control device | |
| JPS6231651B2 (en) | ||
| JPS6214405B2 (en) | ||
| JP2783061B2 (en) | Vehicle fan motor control device | |
| JPS623293Y2 (en) |