JPS6268116A - Fan motor control circuit - Google Patents

Fan motor control circuit

Info

Publication number
JPS6268116A
JPS6268116A JP60207775A JP20777585A JPS6268116A JP S6268116 A JPS6268116 A JP S6268116A JP 60207775 A JP60207775 A JP 60207775A JP 20777585 A JP20777585 A JP 20777585A JP S6268116 A JPS6268116 A JP S6268116A
Authority
JP
Japan
Prior art keywords
fan motor
switch
pressure
turned
refrigerant
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
JP60207775A
Other languages
Japanese (ja)
Inventor
Yuji Kato
裕司 加藤
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Nissan Motor Co Ltd
Original Assignee
Nissan Motor Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Nissan Motor Co Ltd filed Critical Nissan Motor Co Ltd
Priority to JP60207775A priority Critical patent/JPS6268116A/en
Publication of JPS6268116A publication Critical patent/JPS6268116A/en
Pending legal-status Critical Current

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 [HVAC] 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)
  • Air Conditioning Control Device (AREA)

Abstract

PURPOSE:To restrict high revolution of a fan motor and reduce its electric power consumption by providing a switch which is turned on when a blower fan switch is in the high position in series with a pressure switch which responds to pressures of refrigerant. CONSTITUTION:When a switch 5 of an air conditioner is turned on, a fan motor 1, being applied with a voltage through a resistor 2, rotates at a low speed. Here, if the pressure of refrigerant within the cooling cycle is below a specified value, a pressure switch 3 is turned on, a contact point of a relay 4 switches from (a) to (b), and a voltage is directly applied to a fan motor 1 to rotate it at a high speed. In the above circuit, a fan motor switching switch 6 is installed within a passenger compartment and connected between the pressure switch 3 and grounding. With such a constitution, the relay 4 is not actuated by only the pressure switch 3 being turned on due to pressure reduction of refrigerant within the cooling cycle but actuated by turning on the switching switch 6 as well.

Description

【発明の詳細な説明】 （産業上の利用分野） 本発明はエアコンのコンデンサ冷却用ファンモータの消
費電力を低下させたファンモータ制御回路に関する。DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a fan motor control circuit that reduces power consumption of a fan motor for cooling a capacitor of an air conditioner.

（従来技術） 車両のエアコン用コンデンサの後面には、通常冷却用の
ファンが設けられており、その回転はファンモータ制御
回路によって制御されている。(Prior Art) A cooling fan is normally provided at the rear of a vehicle air conditioner condenser, and its rotation is controlled by a fan motor control circuit.

この種の制御回路にあっては従来ターラサイクル内の冷
媒の圧力を検出してその圧力に応じてファンモータの回
転数を二段階に切り換えるようにしている。すなわち冷
媒圧力が低いとコンデンサの放熱源力が低下するためそ
れを補う必要があることからファンモータを高速回転さ
せてコンデンサに多量に送風し、一方冷媒圧力が高いと
きはファンモータを低速で回転させている。第２図はそ
の従来例を示す回路図であり、■はコンデンサ冷却用の
ファンを回転させるファンモータ、２は電圧降ｆ用抵抗
、３はターラサイクル内においてコンデンサの高圧側に
設けられ冷媒の圧力が所定値以下のときオンする圧力ス
イッチ、４は圧力スイッチ３のオンオフによりモータ１
の駆動回路を切り換えるリレー、５はエアコンスイッチ
である。この回路において、エアコンスイッチ５をオン
するとファンモータｌには抵抗２を介して電圧が印加さ
れ低速回転する。このときクーラサイクル内の冷奴圧力
が所定値以下であれば圧力スイッチ３がオンしリレー４
の接点がａからｂに切り換えられ電源電圧が直接印加さ
れてファンモータｌは高速回転する。冷媒の圧力が所定
値以上に上昇すると圧力スイッチ３はオフし、リレー４
の接点はｂからａに切り換えられファンモータｌは再び
低速で回転する。Conventionally, this type of control circuit detects the pressure of the refrigerant in the Taller cycle and switches the rotational speed of the fan motor in two stages according to the detected pressure. In other words, when the refrigerant pressure is low, the heat dissipation power of the condenser decreases, so it is necessary to compensate for this by rotating the fan motor at high speed to blow a large amount of air to the condenser, while when the refrigerant pressure is high, the fan motor rotates at low speed. I'm letting you do it. Fig. 2 is a circuit diagram showing a conventional example, where ■ is a fan motor that rotates a fan for cooling the condenser, 2 is a resistor for voltage drop f, and 3 is a resistor installed on the high-pressure side of the condenser in the Taller cycle to cool the refrigerant. A pressure switch 4 turns on when the pressure is below a predetermined value, and motor 1 is turned on by turning on and off the pressure switch 3.
5 is an air conditioner switch. In this circuit, when the air conditioner switch 5 is turned on, a voltage is applied to the fan motor 1 via the resistor 2, causing it to rotate at a low speed. At this time, if the cold tofu pressure in the cooler cycle is below a predetermined value, the pressure switch 3 is turned on and the relay 4
The contact point of is switched from a to b, the power supply voltage is directly applied, and the fan motor l rotates at high speed. When the refrigerant pressure rises above a predetermined value, the pressure switch 3 is turned off and the relay 4 is turned off.
The contact point of is switched from b to a, and the fan motor l rotates at a low speed again.

このような従来のファンモータ制御回路にあっては圧力
スイッチ３がオフするまでは、すなわちクーラサイクル
内の冷媒の圧力が増加して所定値以］二になるまでは、
ファンモータｌは高速回転して冷却ファンにより多量の
風が送られる。しかしながら、ファンモータを高速回転
させて冷却ファンによりコンデンサに多量に送風するの
は、車室内の温度を急速に下げる目的で冷風を大量に車
室内に送り出す場合、すなわちブロアファンスイッチを
ハイポジション（ＨＩ）にした場合に限れば上方であり
、その他の場合においてもファンモータ１を高速回転さ
せると大量の電力を消費して燃費が悪くなり、また最悪
の場合はバッテリが上ってしまうおそれもある。In such a conventional fan motor control circuit, until the pressure switch 3 is turned off, that is, until the pressure of the refrigerant in the cooler cycle increases to a predetermined value or higher,
The fan motor l rotates at high speed and a large amount of air is sent by the cooling fan. However, rotating the fan motor at high speed and blowing a large amount of air to the condenser with the cooling fan is not recommended when sending a large amount of cold air into the vehicle interior for the purpose of rapidly lowering the temperature inside the vehicle. ), and in other cases too, if the fan motor 1 is rotated at high speed, it will consume a large amount of electricity, resulting in poor fuel efficiency, and in the worst case, there is a risk that the battery will die. .

（発明の目的および構成） 本発明は上記の点にかんがみてなされたもので、冷媒圧
力が所定値以下のときコンデンサ用冷却ファンモータの
回転数を増加させるファンモータ制御回路においてファ
ンモータの消費電力を低下させることを目的とし、この
ため圧力スイッチと直列にブロアファンスイッチがハイ
ポジションのときオンするスイッチを設けるように構成
した。(Objects and Structure of the Invention) The present invention has been made in view of the above points, and includes a fan motor control circuit that increases the rotation speed of a cooling fan motor for a condenser when the refrigerant pressure is below a predetermined value. For this purpose, a switch was provided in series with the pressure switch that turned on when the blower fan switch was in the high position.

（実施例） 以下図面に基づいて本発明を説明する。(Example) The present invention will be explained below based on the drawings.

第１図は本発明によるファンモータ制御回路の一実施例
を示す回路図であり、図中第２図と同じ構成部分につい
ては同じ参照番号を付して示した。FIG. 1 is a circuit diagram showing one embodiment of a fan motor control circuit according to the present invention, in which the same components as in FIG. 2 are denoted by the same reference numerals.

図において、６は車室内に設けたファンモータ切換スイ
ッチであり、圧力スイッチ３とアースとの間に接続され
ている。In the figure, 6 is a fan motor changeover switch provided in the vehicle interior, and is connected between the pressure switch 3 and ground.

以上のように構成すると、クーラサイクル内の冷奴圧力
が低下して圧力スイッチ３がオンしただけではリレー４
は作動せず、したがってファンモータ１も高速回転しな
いが、コンデンサに多量の送風が必要であるとき、たと
えば車室内への冷風の吹出風量を増加するためにブロア
ファンスイッチをハイポジション（ＨＩ）にしたとき、
別個に設けられたファンモータ切換スイッチ６をオンさ
せることによってリレーが作動しその接点がａからｂに
切り換えられてファンモータ１は高速回転する。その後
冷媒の圧力が上昇して所定値以［二となったとき、ある
いはファンモータ切換スインチロをオフしたときリレー
４はオフされその接点はｂからａに切り換えられてファ
ンモータ１は再び低速で回転する。With the above configuration, if the pressure switch 3 is turned on due to a drop in the pressure inside the cooler cycle, the relay 4
does not operate, and therefore the fan motor 1 does not rotate at high speed, but when a large amount of air is required to be blown to the condenser, for example, the blower fan switch may be set to the high position (HI) to increase the amount of cold air blown into the passenger compartment. When I did,
By turning on a separately provided fan motor changeover switch 6, a relay is actuated, its contact point is switched from a to b, and the fan motor 1 rotates at high speed. After that, when the pressure of the refrigerant rises to a predetermined value or more, or when the fan motor switching switch is turned off, the relay 4 is turned off, its contact is switched from b to a, and the fan motor 1 rotates at low speed again. do.

上記実施例においてはファンモータ切換スイッチ６を独
立して設けたが、それに限らず車室内のブロアファンス
イッチのハイポジションと連動させてもよい。In the above embodiment, the fan motor changeover switch 6 is provided independently, but the switch 6 is not limited thereto and may be linked to the high position of the blower fan switch in the vehicle interior.

（発明の効果） 以上説明したように、本発明においては、冷媒の圧力が
所定値以下のときオンする圧力スイッチを有し、その圧
力スイッチがオンしたときコンデンサ冷却用ファンモー
タの回転数を増加するように切り換えるファンモータ制
御回路において、圧力スイッチと直列にブロアファンス
イッチがノ＼イポジションのときオンするスイッチを設
けるように構成したため、ファンモータの消費電力を低
下させることができる。(Effects of the Invention) As explained above, the present invention includes a pressure switch that is turned on when the refrigerant pressure is below a predetermined value, and when the pressure switch is turned on, the rotation speed of the condenser cooling fan motor is increased. In the fan motor control circuit that switches the fan motor so as to switch, the power consumption of the fan motor can be reduced because a switch that is turned on when the blower fan switch is in the no position is provided in series with the pressure switch.

また本発明によればファンモータが高速回転する頻度が
少なくなり、ファンモータの高速回転に伴う騒音や振動
も減少するという効果が得られる。Further, according to the present invention, the frequency at which the fan motor rotates at high speed is reduced, and noise and vibration accompanying high speed rotation of the fan motor are also reduced.

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

第１図は本発明によるファンモータ制御回路の一実施例
の回路図、第２図は従来のファンモータ制御回路の回路
図である。 １・・・ファンモータ、？・・・電圧降下用抵抗、３・
・・圧力スイッチ、４・・・リレー、５・・・エアコン
スイッチ、６・・・ファンモータ切換スイッチ第１図 第２図 １カスイー庁 ファンｅ−９ 時（Φスイ７１FIG. 1 is a circuit diagram of an embodiment of a fan motor control circuit according to the present invention, and FIG. 2 is a circuit diagram of a conventional fan motor control circuit. 1...Fan motor? ...Resistance for voltage drop, 3.
...Pressure switch, 4...Relay, 5...Air conditioner switch, 6...Fan motor changeover switch Figure 1 Figure 2 Figure 1

Claims (1)

【特許請求の範囲】[Claims] 　冷媒の圧力が所定値以下のときオンする圧力スイッチ
を有し、該圧力スイッチがオンしたときコンデンサ冷却
用ファンモータの回転数を増加するように切り換えるフ
ァンモータ制御回路において、前記圧力スイッチと直列
にブロアファンスイッチがハイポジションのときオンす
るスイッチを設けたことを特徴とするファンモータ制御
回路。In a fan motor control circuit that has a pressure switch that is turned on when the pressure of the refrigerant is lower than a predetermined value, and that switches to increase the rotational speed of a condenser cooling fan motor when the pressure switch is turned on, a fan motor control circuit that is connected in series with the pressure switch A fan motor control circuit comprising a switch that is turned on when a blower fan switch is in a high position.
JP60207775A 1985-09-21 1985-09-21 Fan motor control circuit Pending JPS6268116A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP60207775A JPS6268116A (en) 1985-09-21 1985-09-21 Fan motor control circuit

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP60207775A JPS6268116A (en) 1985-09-21 1985-09-21 Fan motor control circuit

Publications (1)

Publication Number Publication Date
JPS6268116A true JPS6268116A (en) 1987-03-28

Family

ID=16545314

Family Applications (1)

Application Number Title Priority Date Filing Date
JP60207775A Pending JPS6268116A (en) 1985-09-21 1985-09-21 Fan motor control circuit

Country Status (1)

Country Link
JP (1) JPS6268116A (en)

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