JP3801411B2 - Air conditioner for vehicles - Google Patents
Air conditioner for vehicles Download PDFInfo
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- JP3801411B2 JP3801411B2 JP2000080870A JP2000080870A JP3801411B2 JP 3801411 B2 JP3801411 B2 JP 3801411B2 JP 2000080870 A JP2000080870 A JP 2000080870A JP 2000080870 A JP2000080870 A JP 2000080870A JP 3801411 B2 JP3801411 B2 JP 3801411B2
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- temperature
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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
- B60H1/00642—Control systems or circuits; Control members or indication devices for heating, cooling or ventilating devices
- B60H1/00814—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
- B60H1/00821—Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation the components being ventilating, air admitting or air distributing devices
- B60H1/00828—Ventilators, e.g. speed control
Description
【０００１】
【発明の属する技術分野】
この発明は、車両用空気調和装置のブロアファンの制御方式に関する。
【０００２】
【従来の技術】
従来、車両用空気調和装置のブロアファンの回転速度制御は図３に示すような切替によって行われていた。
この図の横軸の温度差は、（車内温度）−（設定温度）であり、温度差がプラスである図の右側の領域は冷房の領域であることを示し、温度差がマイナスである図の左側の領域は暖房の領域であることを示している。また、縦軸はブロアファンの回転速度（通常のＤＣモータの場合、モータに与える電圧）を表している。
【０００３】
図３において、温度差がゼロ、または温度差僅少領域では、ブロアは最低レベルの一定速度で回転し、それ以外の領域では温度差とブロア回転速度とが一次の関係になるように１ステップあたりの回転速度変化（モータに与える電圧の変化）を一定にするような段階制御を行い、図では冷房側、暖房側とも１２段階の切替制御を行っている。このうち常時使用領域では４段階の切り替え制御が行われる。
騒音に関しては当然ながら、ブロアファンの回転速度を上昇させると騒音も増加することになる。
【０００４】
【発明が解決しようとする課題】
上述の制御ではブロア回転速度の高い領域は、温度差が大きい場合であり、空気調和装置の使用開始時の短時間に限られ、通常は回転速度の低い領域での使用が大半である。
ところが、短時間だけ使用されるブロア回転速度の高い領域も、常時使用されるブロア回転速度の低い領域も１段階あたりの回転速度変化を同一としていたので、通常使用領域における微少な温度変化によって騒音レベルが大きく変化してしまうという課題があった。
【０００５】
本発明はこのような背景の下になされたもので、切替制御段数を増加させることなく、通常使用領域でのブロアファンの低騒音化を図ることができる車両用空気調和装置を提供することを目的とする。
【０００６】
【課題を解決するための手段】
請求項１に記載の発明は、車両用空気調和装置のブロアファン制御方式であって、冷房時の冷気または暖房時の暖気を車内に送風するブロアファンと、該ブロアファンの回転速度を所定の段数で切り替えて送風風量を制御する回転速度切替手段と、空調温度を設定する空調温度設定手段と、車内温度を検出する車内温度検出手段と、前記車内温度と前記空調温度設定手段によって設定された前記空調温度との温度差に基づいて、前記ブロアファンの回転速度の切り替えにおける１段階あたりの回転速度の変化率が一定となるように前記回転速度切替手段に切替指令を与える切替指令生成手段と、を具備し、
該切替指令生成手段は、前記車内温度と前記設定された空調温度との温度差が小さい常時使用領域のうち前記温度差がゼロまたはごく僅かな温度差僅少領域の場合には、前記ブロアファンをその能力の最低レベルの一定速度で回転制御を行い、前記温度差僅少領域以外の前記常時使用領域の場合には、前記１段階あたりの回転速度変化を、送風風量を制御する全領域で同一とした場合よりも小さく設定し、前記常時使用領域における切り替え段数を増加させて回転速度変化が線形制御に近い細かい段階制御を行い、前記温度差が前記常時使用領域よりも大きい領域の場合には、前記１段階あたりの回転速度変化を、送風風量を制御する全領域で同一とした場合よりも大きく設定し、前記常時使用領域で切り替え段数が増加した分、切り替えの段数を減少させて粗い段階制御を行うことを特徴とする車両用空気調和装置を提供する。
【０００７】
この発明によれば、短時間だけ使用される車内温度と設定温度との温度差が大きいときは切替幅を大きくして粗い段階制御を行い、車内温度と設定温度との温度差が小さい常用使用領域では切替幅を小さくして細かい段階制御を行う。
【０００８】
請求項２に記載の発明は、請求項１に記載の車両用空気調和装置において、
前記回転速度切替手段が、前記ブロアファンを駆動するＤＣモータに印加する直流電圧を変化させて回転速度の切り替えを行うことを特徴とする。
【０００９】
この発明によれば、回転速度の段階制御をＤＣモータに印加する直流電圧を段階的に変化させて行う。
【００１０】
請求項３に記載の発明は、請求項１に記載の車両用空気調和装置において、
前記回転速度切替手段が、前記ブロアファンを駆動するＤＣモータにパルス幅変調された直流電圧を印加して回転速度の切り替えを行うことを特徴とする。
【００１１】
この発明によれば、回転速度の段階制御をＤＣモータに印加する直流電圧をパルス幅変調された電圧とし、実効的に直流電圧を段階的に変化させて行う。
【００１２】
請求項４に記載の発明は、請求項１に記載の車両用空気調和装置において、
前記回転速度切替手段が、前記ブロアファンを駆動するＤＣブラシレスモータに与える回転指令信号のデューティ比を変化させて回転速度の切り替えを行うことを特徴とする。
【００１３】
この発明によれば、回転速度の段階制御をＤＣブラシレスモータに与える回転指令信号のデューティ比を段階的に変化させて行う。
【００１４】
【発明の実施の形態】
以下、この発明の一実施形態について図を参照しながら説明する。図１はこの発明の一実施形態による車両用空気調和装置のうちブロアファンの速度制御関係の構成を示すブロック図である。
この図において、符号１はブロアファンであり、直結されたモータ２によって駆動される。
このモータ２は、空調温度設定手段３による設定温度と車内温度検出手段４による検出温度との温度差の値によって切替指令生成手段５によって切り替え指令を生成し、この切替指令によって動作する回転速度切替手段６が与える電圧によって駆動される。
【００１５】
このような構成によるブロア回転速度の切替制御について図２を参照して説明する。
この図の横軸の温度差は、（車内温度）−（設定温度）であり、温度差がプラスである図の右側の領域は冷房の領域であることを示し、温度差がマイナスである図の左側の領域は暖房の領域であることを示している。また、縦軸はブロアファンの回転速度（通常のＤＣモータの場合、モータに与える電圧）を表している。
回転速度切替手段６によってモータ２に与えられる電圧は、電圧値の制御された直流電圧であってもＰＷＭ変調された直流電圧であってもよい。
【００１６】
図２において、温度差がゼロ、または温度差僅少領域では、ブロアは最低レベルの一定速度で回転し、それ以外の常時使用領域では温度差とブロア回転速度とが一次の関係になるように１ステップあたりの回転速度変化（モータに与える電圧の変化）を一定にするような段階制御を行い、回転速度切替手段６による切替単位幅を従来技術による切替幅の１／２とすることによって８段階の切替を行う。
【００１７】
常時使用領域以外の領域では、切替単位幅を常時使用領域の４倍として４段階の切替を行う。
このような切替制御を行うことにより、全体の切替段数を増やすことなく、常時使用領域での切替制御をきめ細かく行い、線形制御に近い制御特性を得ることができる。
【００１８】
その代わりに、常時使用領域以外の温度差の大きな領域では、切替制御の段数が４段階に減少し、粗い切替制御を行うことになるが、この領域は空気調和装置の使用開始時の短時間に限られるので、必要な風量が得られるならばディメリットとなることはない。
【００１９】
以上、本発明の一実施形態の動作を図面を参照して詳述してきたが、本発明はこの実施形態に限られるものではなく、本発明の要旨を逸脱しない範囲の設計変更等があっても本発明に含まれる。
【００２０】
例えば、常時使用領域とそれ以外の領域での切替単位幅の比率や切替段数は、上述の実施形態の数値に限られるものではなく、必要に応じて選定される設計事項である。
【００２１】
また、ブロアファンを駆動するモータは、通常のＤＣモータとして印加する直流電圧を変化させる場合について説明したが、ＤＣブラシレスモータを使用し、このＤＣブラシレスモータに与える回転指令信号のデューティ比を変化させて回転速度の切り替えを行うものであってもよい。
【００２２】
【発明の効果】
これまでに説明したように、この発明によれば常時使用領域でのモータ速度の切替幅を小さくし、空気調和装置の使用開始時等の温度差の大きな領域のモータ速度切替幅を大きくするようにしたので、切替段数を増加させることなく常時使用領域のブロアファンの速度と温度差とをリニアな関係に近づけることができ、ブロアファンによる騒音を低減することができるという効果が得られる。
【図面の簡単な説明】
【図１】 本発明の一実施形態による車両用空気調和装置のうちブロアファンの速度制御関係の構成を示すブロック図。
【図２】 本発明の一実施形態によるブロアファンの制御を説明するための特性図。
【図３】 従来の技術によるブロアファンの制御を説明するための特性図。
【符号の説明】
１…ブロアファン
２…モータ
３…空調温度設定手段
４…車内温度検出手段
５…切替指令生成手段
６…回転速度切替手段[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a blower fan control system for a vehicle air conditioner.
[0002]
[Prior art]
Conventionally, the rotational speed control of a blower fan of a vehicle air conditioner has been performed by switching as shown in FIG.
The temperature difference on the horizontal axis in this figure is (in-vehicle temperature) − (set temperature), and the area on the right side of the figure where the temperature difference is positive indicates that it is a cooling area, and the temperature difference is negative. The area on the left side of is a heating area. The vertical axis represents the rotational speed of the blower fan (in the case of a normal DC motor, the voltage applied to the motor).
[0003]
In FIG. 3, when the temperature difference is zero or the temperature difference is small, the blower rotates at a constant speed at the lowest level, and in other regions, the temperature difference and the blower rotation speed are in a linear relationship. In the figure, 12 stages of switching control are performed on both the cooling side and the heating side. Of these, four-step switching control is performed in the always-use area.
As a matter of course, when the rotational speed of the blower fan is increased, the noise also increases.
[0004]
[Problems to be solved by the invention]
In the above-described control, the region where the blower rotational speed is high is a case where the temperature difference is large and is limited to a short time at the start of use of the air conditioner, and is usually mostly used in the region where the rotational speed is low.
However, since the region where the blower rotational speed is used only for a short time and the region where the blower rotational speed is always used are the same, the change in rotational speed per stage is the same. There was a problem that the level would change greatly.
[0005]
The present invention has been made under such a background, and provides a vehicle air conditioner capable of reducing the noise of a blower fan in a normal use region without increasing the number of switching control stages. Objective.
[0006]
[Means for Solving the Problems]
The invention according to claim 1 is a blower fan control system for a vehicle air conditioner, wherein the blower fan blows cool air during cooling or warm air during heating into the vehicle, and the rotational speed of the blower fan is set to a predetermined value. Rotation speed switching means for switching the number of stages to control the air flow rate, air conditioning temperature setting means for setting the air conditioning temperature, vehicle temperature detection means for detecting the vehicle interior temperature, the vehicle interior temperature and the air conditioning temperature setting means A switching command generating means for giving a switching command to the rotational speed switching means based on a temperature difference from the air conditioning temperature so that a rate of change of the rotational speed per stage in switching the rotational speed of the blower fan is constant ; , And
When the temperature difference is zero or a very slight temperature difference region in the constant use region where the temperature difference between the in-vehicle temperature and the set air conditioning temperature is small , the switching command generation unit turns the blower fan on. Rotational control is performed at a constant speed at the lowest level of the capability, and in the case of the constantly used region other than the region where the temperature difference is small , the rotational speed change per step is the same in all regions where the air flow rate is controlled. If it is a region where the temperature difference is larger than the constantly used region, setting the smaller than the case, and increasing the number of switching steps in the constantly used region to perform fine step control where the rotational speed change is close to linear control, The change in rotational speed per stage is set larger than that in the case where the entire area for controlling the air flow rate is the same, and the number of switching steps is increased in the constantly used area. To provide a vehicle air conditioning system which is characterized in that the coarse phase control to reduce the number.
[0007]
According to the present invention, when the temperature difference between the in-vehicle temperature and the set temperature that is used for only a short time is large, the switching range is increased to perform coarse step control, and the temperature difference between the in-vehicle temperature and the set temperature is small. In the region, the switching width is reduced to perform fine step control.
[0008]
The invention according to
The rotation speed switching means switches the rotation speed by changing a DC voltage applied to a DC motor that drives the blower fan.
[0009]
According to the present invention, the rotational speed stepwise control is performed by stepwise changing the DC voltage applied to the DC motor.
[0010]
According to a third aspect of the present invention, in the vehicle air conditioner according to the first aspect,
The rotational speed switching means switches the rotational speed by applying a pulse-width modulated DC voltage to a DC motor that drives the blower fan.
[0011]
According to the present invention, stepwise control of the rotation speed is performed by changing the DC voltage applied stepwise to the DC motor and effectively changing the DC voltage stepwise.
[0012]
According to a fourth aspect of the present invention, in the vehicle air conditioner according to the first aspect,
The rotation speed switching means switches the rotation speed by changing a duty ratio of a rotation command signal given to a DC brushless motor that drives the blower fan.
[0013]
According to the present invention, the rotational speed step control is performed by stepwise changing the duty ratio of the rotation command signal given to the DC brushless motor.
[0014]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of the speed control of a blower fan in a vehicle air conditioner according to an embodiment of the present invention.
In this figure, reference numeral 1 denotes a blower fan, which is driven by a directly connected
The
[0015]
The blower rotation speed switching control with such a configuration will be described with reference to FIG.
The temperature difference on the horizontal axis in this figure is (in-vehicle temperature) − (set temperature), and the area on the right side of the figure where the temperature difference is positive indicates that it is a cooling area, and the temperature difference is negative. The area on the left side of is a heating area. The vertical axis represents the rotational speed of the blower fan (in the case of a normal DC motor, the voltage applied to the motor).
The voltage applied to the
[0016]
In FIG. 2, the blower rotates at a constant speed at the lowest level when the temperature difference is zero or the temperature difference is small, and the temperature difference and the blower rotation speed have a primary relationship in the other constant use areas. Step control is performed so that the change in rotational speed per step (change in voltage applied to the motor) is made constant, and the switching unit width by the rotational speed switching means 6 is set to ½ of the switching width according to the prior art. Is switched.
[0017]
In areas other than the always-used area, the switching unit width is set to four times that of the always-used area, and switching in four stages is performed.
By performing such switching control, it is possible to finely perform switching control in the constantly used region without increasing the total number of switching stages, and obtain control characteristics close to linear control.
[0018]
Instead, in a region where the temperature difference is large other than the normal use region, the number of stages of switching control is reduced to four stages, and rough switching control is performed. This region is a short time at the start of use of the air conditioner. As long as the necessary air volume is obtained, there is no disadvantage.
[0019]
The operation of one embodiment of the present invention has been described in detail with reference to the drawings. However, the present invention is not limited to this embodiment, and there are design changes and the like without departing from the gist of the present invention. Are also included in the present invention.
[0020]
For example, the ratio of the switching unit width and the number of switching stages in the constant use area and the other areas are not limited to the numerical values of the above-described embodiment, but are design items selected as necessary.
[0021]
Further, the motor for driving the blower fan has been described for changing the DC voltage applied as a normal DC motor. However, a DC brushless motor is used, and the duty ratio of the rotation command signal applied to the DC brushless motor is changed. Thus, the rotation speed may be switched.
[0022]
【The invention's effect】
As described above, according to the present invention, the motor speed switching width in the constant use region is reduced, and the motor speed switching width in the region where the temperature difference is large, such as at the start of use of the air conditioner, is increased. As a result, the speed and temperature difference of the blower fan in the constantly used region can be brought closer to a linear relationship without increasing the number of switching stages, and the effect of reducing noise from the blower fan can be obtained.
[Brief description of the drawings]
FIG. 1 is a block diagram showing a configuration related to speed control of a blower fan in a vehicle air conditioner according to an embodiment of the present invention.
FIG. 2 is a characteristic diagram for explaining control of a blower fan according to an embodiment of the present invention.
FIG. 3 is a characteristic diagram for explaining control of a blower fan according to a conventional technique.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ...
Claims (4)
該ブロアファンの回転速度を所定の段数で切り替えて送風風量を制御する回転速度切替手段と、
空調温度を設定する空調温度設定手段と、
車内温度を検出する車内温度検出手段と、
前記車内温度と前記空調温度設定手段によって設定された前記空調温度との温度差に基づいて、前記ブロアファンの回転速度の切り替えにおける１段階あたりの回転速度の変化率が一定となるように前記回転速度切替手段に切替指令を与える切替指令生成手段と、を具備し、
該切替指令生成手段は、
前記車内温度と前記設定された空調温度との温度差が小さい常時使用領域のうち前記温度差がゼロまたはごく僅かな温度差僅少領域の場合には、前記ブロアファンをその能力の最低レベルの一定速度で回転制御を行い、
前記温度差僅少領域以外の前記常時使用領域の場合には、前記１段階あたりの回転速度変化を、送風風量を制御する全領域で同一とした場合よりも小さく設定し、前記常時使用領域における切り替え段数を増加させて回転速度変化が線形制御に近い細かい段階制御を行い、
前記温度差が前記常時使用領域よりも大きい領域の場合には、前記１段階あたりの回転速度変化を、送風風量を制御する全領域で同一とした場合よりも大きく設定し、前記常時使用領域で切り替え段数が増加した分、切り替えの段数を減少させて粗い段階制御を行うことを特徴とする車両用空気調和装置。A blower fan control system for a vehicle air conditioner, which blows cool air during cooling or warm air during heating into the vehicle,
Rotation speed switching means for switching the rotation speed of the blower fan at a predetermined number of stages to control the air flow rate;
Air conditioning temperature setting means for setting the air conditioning temperature;
Vehicle temperature detection means for detecting the vehicle temperature;
Based on the temperature difference between the vehicle interior temperature and the air-conditioning temperature set by the air-conditioning temperature setting means, the rotation speed is changed so that the rate of change of the rotation speed per stage in switching the rotation speed of the blower fan is constant. Switching command generation means for giving a switching command to the speed switching means,
The switching command generation means includes
When the temperature difference is zero or a very slight temperature difference in the constant use range where the temperature difference between the vehicle interior temperature and the set air conditioning temperature is small, the blower fan is kept at a constant minimum level. Rotation control at speed,
In the case of the constantly used region other than the region where the temperature difference is small, the change in the rotational speed per stage is set smaller than that in the case where the entire region for controlling the air flow rate is made the same. Increase the number of steps to perform fine step control where the rotation speed change is close to linear control,
In the case where the temperature difference is larger than the constantly used region, the change in rotational speed per stage is set larger than that in the same region in all regions that control the air flow rate. A vehicular air conditioner that performs rough phase control by decreasing the number of switching steps by an amount corresponding to an increase in the number of switching steps .
前記ブロアファンを駆動するＤＣモータに印加する直流電圧を変化させて回転速度の切り替えを行うことを特徴とする請求項１に記載の車両用空気調和装置。The rotation speed switching means is
2. The vehicle air conditioner according to claim 1, wherein the rotational speed is switched by changing a DC voltage applied to a DC motor that drives the blower fan. 3.
前記ブロアファンを駆動するＤＣモータにパルス幅変調された直流電圧を印加して回転速度の切り替えを行うことを特徴とする請求項１に記載の車両用空気調和装置。The rotation speed switching means is
2. The vehicle air conditioner according to claim 1, wherein a rotation speed is switched by applying a pulse-width modulated direct current voltage to a DC motor that drives the blower fan. 3.
前記ブロアファンを駆動するＤＣブラシレスモータに与える回転指令信号のデューティ比を変化させて回転速度の切り替えを行うことを特徴とする請求項１に記載の車両用空気調和装置。The rotation speed switching means is
The vehicle air conditioner according to claim 1, wherein the rotation speed is switched by changing a duty ratio of a rotation command signal applied to a DC brushless motor that drives the blower fan.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000080870A JP3801411B2 (en) | 2000-03-22 | 2000-03-22 | Air conditioner for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2000080870A JP3801411B2 (en) | 2000-03-22 | 2000-03-22 | Air conditioner for vehicles |
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| JP2001260630A JP2001260630A (en) | 2001-09-26 |
| JP3801411B2 true JP3801411B2 (en) | 2006-07-26 |
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| JP2000080870A Expired - Lifetime JP3801411B2 (en) | 2000-03-22 | 2000-03-22 | Air conditioner for vehicles |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| FR2849626B1 (en) * | 2003-01-06 | 2005-02-25 | Valeo Climatisation | CONTROL OF A HEATING AND / OR AIR CONDITIONING INSTALLATION COMPRISING A PULLER AND A PHOTOCATALYST |
| CN105196833B (en) * | 2015-10-21 | 2018-06-05 | 惠州华阳通用电子有限公司 | A kind of vehicle-mounted energy-saving automatic air condition control method and device |
| CN109656777B (en) * | 2018-11-20 | 2022-12-09 | 超越科技股份有限公司 | Fan noise reduction regulation and control method and device, terminal and storage medium |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| JPS6029540A (en) * | 1983-07-26 | 1985-02-14 | Toshiba Corp | Air quantity controlling method for air conditioner |
| JPS63219412A (en) * | 1987-03-09 | 1988-09-13 | Suzuki Motor Co Ltd | Air conditioning device for vehicle |
| JPH01111156A (en) * | 1987-10-26 | 1989-04-27 | Matsushita Electric Ind Co Ltd | Controller of air conditioner |
| JP2696394B2 (en) * | 1989-05-17 | 1998-01-14 | 株式会社ゼクセル | Blower motor controller for automotive air conditioner |
| JP3968871B2 (en) * | 1998-06-09 | 2007-08-29 | 株式会社デンソー | Air conditioner for vehicles |
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