JP2990991B2 - Heat pump type air conditioner for vehicles - Google Patents
Heat pump type air conditioner for vehiclesInfo
- Publication number
- JP2990991B2 JP2990991B2 JP5053435A JP5343593A JP2990991B2 JP 2990991 B2 JP2990991 B2 JP 2990991B2 JP 5053435 A JP5053435 A JP 5053435A JP 5343593 A JP5343593 A JP 5343593A JP 2990991 B2 JP2990991 B2 JP 2990991B2
- Authority
- JP
- Japan
- Prior art keywords
- pressure
- air
- compressor
- temperature
- indoor
- 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 - Fee Related
Links
Landscapes
- Air-Conditioning For Vehicles (AREA)
- Air Conditioning Control Device (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明は、車両の少なくとも暖房
をヒートポンプで行う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 an air conditioner for a vehicle which heats at least a vehicle by a heat pump.
【０００２】[0002]
【従来の技術】従来の燃料駆動自動車用空調装置は、例
えば、図７にその具体的構成を示すように、冷房運転
は、冷媒を圧縮する圧縮機１をエンジン２１にて駆動
し、室外熱交換器２と室外熱交換器用送風装置３で車室
外空気に放熱して冷媒を凝縮液化させた後、その冷媒を
冷媒絞り装置４を介して、室内熱交換器５に導き、室内
用送風装置６により送風された空気を冷却しながら蒸発
し冷房作用を行うものであった。2. Description of the Related Art A conventional air conditioner for a fuel-powered vehicle, for example, as shown in FIG. 7, shows a cooling operation in which a compressor 1 for compressing a refrigerant is driven by an engine 21 and an outdoor heat source. The refrigerant is condensed and liquefied by radiating heat to the vehicle outside air by the exchanger 2 and the outdoor heat exchanger blower 3, and the refrigerant is guided to the indoor heat exchanger 5 through the refrigerant expansion device 4, and the indoor blower The air blown by step 6 evaporates while cooling, thereby performing a cooling action.
【０００３】また暖房運転は、前記圧縮機１を停止しヒ
ータコア１５にエンジン２１の冷却水（温水）を流し、
室内用送風装置６により送風された空気を加熱するもの
である。車室内空気吹出口１０、１１、１２より吹き出
される空気温度の調節は、通風ダクト２０内に配された
ミックスダンパ１６の開度調節にてヒータコア１５を流
れる温風と、ヒータコア１５をバイパスする冷風の量を
調節して行うものである。さらに、圧縮機１をエンジン
２１にて駆動させて、室内熱交換器５にて冷却された空
気をヒータコア１５にて再加熱することにより除湿暖房
ができる。また、ミックスダンパ１６を用いることによ
り吹出温度を冷風から温風へまたその逆に温風から冷風
へ連続して変化させることが可能である。In the heating operation, the compressor 1 is stopped, and cooling water (warm water) of the engine 21 is supplied to the heater core 15.
The air blown by the indoor blower 6 is heated. The temperature of the air blown from the vehicle interior air outlets 10, 11, and 12 is adjusted by adjusting the opening degree of the mix damper 16 disposed in the ventilation duct 20 so that the hot air flowing through the heater core 15 and the heater core 15 are bypassed. This is performed by adjusting the amount of cold air. Further, the compressor 1 is driven by the engine 21, and the air cooled by the indoor heat exchanger 5 is reheated by the heater core 15 to perform dehumidifying heating. Further, by using the mix damper 16, it is possible to continuously change the blowing temperature from cold air to warm air and vice versa.
【０００４】一方、圧縮機１を電動機で駆動するヒート
ポンプ式空調装置を図８に示す。冷房運転は上記と同様
であるが、暖房運転については上記エンジン２１の冷却
水（温水）は無いため、圧縮機１の下流に四方切替え弁
７を用いて冷媒流路を逆にし、室内熱交換器５で室内用
送風装置６により送風された空気を加熱して冷媒を凝縮
液化させた後、その冷媒を冷媒絞り装置４を介して室外
熱交換器２に導き、ここで車室外の空気を冷却しながら
冷媒が吸熱、蒸発するヒートポンプ暖房を行うようにな
っている。従って、吹出温度調節は、暖冷房運転能力調
節装置２２により電動機８を駆動する電動機駆動装置９
を制御して、圧縮機１の回転数を調節し、また風量調節
装置２３により送風機駆動装置２４を制御して、室内用
送風装置６の送風量を調節して行うこととなる。FIG. 8 shows a heat pump type air conditioner in which the compressor 1 is driven by an electric motor. The cooling operation is the same as described above, but for the heating operation, since there is no cooling water (hot water) for the engine 21, the refrigerant flow path is reversed using the four-way switching valve 7 downstream of the compressor 1, and indoor heat exchange is performed. After the air blown by the indoor blower 6 is heated by the air blower 5 to condense and liquefy the refrigerant, the refrigerant is guided to the outdoor heat exchanger 2 via the refrigerant expansion device 4, where the air outside the vehicle compartment is discharged. Heat pump heating is performed, in which the refrigerant absorbs heat and evaporates while cooling. Therefore, the blowout temperature is controlled by the motor drive device 9 that drives the motor 8 by the heating / cooling operation capability control device 22.
Is controlled to adjust the number of rotations of the compressor 1, and the air volume adjusting device 23 controls the air blower driving device 24 to adjust the air blowing amount of the indoor air blowing device 6.
【０００５】また、暖冷房の切り替えは、暖冷房運転切
替装置２５により四方切替え弁７を作動させ冷媒流路を
切り替えて行う。Switching between heating and cooling is performed by operating the four-way switching valve 7 by the heating / cooling operation switching device 25 to switch the refrigerant flow path.
【０００６】また、空調装置の部品保護のために、圧縮
機１からの吐出冷媒の圧力を検出する高圧検出装置２７
・吐出冷媒の温度を検出する吐出温検出装置２８を備え
て、各検出値が各所定値を超えた場合、クラッチ３０を
ＯＦＦするか、または電動機駆動装置９を制御して圧縮
機１を停止させる保護装置２９が備えられている。In order to protect the components of the air conditioner, a high pressure detecting device 27 for detecting the pressure of the refrigerant discharged from the compressor 1 is provided.
The compressor 1 is stopped by turning off the clutch 30 or controlling the electric motor driving device 9 when each detected value exceeds each predetermined value, provided with the discharge temperature detecting device 28 for detecting the temperature of the discharged refrigerant. A protection device 29 is provided.
【０００７】[0007]
【発明が解決しようとする課題】従来の燃料駆動自動車
用空調装置においては、冷凍サイクルは冷房運転される
のみであるので、室外熱交換器用送風装置３を常に高速
で作動させておくことが可能であり、且つ車速風が加わ
るので吐出冷媒は迅速に凝縮液化されるため、圧縮機１
からの吐出冷媒の圧力・温度は上昇しにくく、上記保護
装置２９が作動することは少ない。In the conventional air conditioner for a fuel-driven vehicle, the refrigeration cycle is only operated for cooling, so that the blower 3 for the outdoor heat exchanger can always be operated at a high speed. In addition, since the discharged refrigerant is rapidly condensed and liquefied due to the addition of vehicle speed wind, the compressor 1
The pressure and temperature of the refrigerant discharged from the pump hardly rise, and the protection device 29 is rarely activated.
【０００８】ヒートポンプ式空調装置の暖房運転におい
ては、室内熱交換器５で室内用送風装置６により送風さ
れた空気に放熱して冷媒は凝縮液化する。一方、室内用
送風装置６による送風量は、乗員の希望により、また自
動空調装置においては自動的に決められる。よって、送
風量が減少することは頻繁に有りうる。このため、吐出
冷媒は迅速に凝縮液化されず、圧縮機１からの吐出冷媒
の圧力・温度は上昇し保護装置２９が作動して圧縮機１
を停止させ暖房運転が止まることが多く発生してしまう
ため、乗員にとって大変使い勝手の良くない空調装置と
なってしまう。[0008] In the heating operation of the heat pump type air conditioner, the indoor heat exchanger 5 radiates heat to the air blown by the indoor blower 6 to condense and liquefy the refrigerant. On the other hand, the amount of air blown by the indoor blower 6 is determined automatically by an occupant's request and automatically by an automatic air conditioner. Therefore, it is frequently possible that the amount of air blow is reduced. For this reason, the discharged refrigerant is not quickly condensed and liquefied, and the pressure and temperature of the discharged refrigerant from the compressor 1 increase, and the protection device 29 is activated to activate the compressor 1
Often, the heating operation is stopped and the heating operation is stopped, so that the air conditioner is not very convenient for the occupants.
【０００９】よって、保護装置２９の作動を減らすため
に、通常吐出冷媒の圧力の方が吐出冷媒の温度よりも速
く変化するので、常に圧力を連続的に検出してその変化
傾向により、圧縮機１の回転数を調節して検出値が所定
値を超えないように制御する方法が考えられる。しかし
ながら、また圧力を連続的に検出するセンサは実験設備
等には使用されているものの、車両の空調装置に使用す
ることはコストが高く実用的ではない。また、その制御
も複雑になる。Therefore, in order to reduce the operation of the protection device 29, the pressure of the normally discharged refrigerant changes faster than the temperature of the discharged refrigerant. A method of controlling the rotation speed of 1 so that the detected value does not exceed a predetermined value can be considered. However, although a sensor for continuously detecting pressure is used for experimental facilities and the like, it is expensive and impractical to use it for an air conditioner of a vehicle. Also, the control becomes complicated.
【００１０】さらに、室内熱交換器５の吸込空気温度が
上昇した場合、例えば吸込空気が手動・自動に係わら
ず、導入空気切替装置２６にて、車室外空気から車室内
空気に変更された場合においても、低温の車室外空気に
放熱する場合には冷媒は迅速に凝縮液化するが、比較的
暖かい車室内空気に放熱する場合には冷媒は迅速には凝
縮液化できず圧縮機１からの吐出冷媒の圧力・温度は上
昇する。よって、保護装置２９が作動して圧縮機１を停
止させる場合が多く発生する。Further, when the temperature of the suction air of the indoor heat exchanger 5 rises, for example, when the suction air is changed from outside air to inside air by the introduction air switching device 26 regardless of whether it is manual or automatic. In this case, the refrigerant is quickly condensed and liquefied when the heat is radiated to the low temperature outside air, but the refrigerant cannot be rapidly condensed and liquefied when the heat is radiated to the relatively warm air inside the vehicle. The pressure and temperature of the refrigerant increase. Therefore, the protection device 29 operates to stop the compressor 1 in many cases.
【００１１】従って、本発明は冷媒圧力・温度の上昇に
て空調保護装置が作動し空調装置が停止することを簡単
な方法で防止する車両用ヒートポンプ式空調装置を提供
することを目的とする。Accordingly, it is an object of the present invention to provide a heat pump type air conditioner for a vehicle, which prevents an air conditioner protection device from being activated by a rise in refrigerant pressure and temperature and stopping the air conditioner by a simple method.
【００１２】[0012]
【課題を解決するための手段】本発明は、第１の手段と
して上記課題を解決するために、空調装置の部品保護の
ために、冷媒の比較的高い第１の圧力を検出する第１の
圧力検出装置を備え、第１の圧力検出装置が第１の圧力
を検出した場合、少なくとも圧縮機を停止させて空調装
置の部品を保護し、第１の圧力よりも低い第２の圧力を
検出する第２の圧力検出装置及び室内用熱交換器で加熱
される空気温度を直接にもしくは間接的に検出する吸込
空気温度検出装置を備え、第２の圧力検出装置が第２の
圧力を検出した場合、少なくとも室内用送風装置による
室内送風量に比例し、吸込空気温度に反比例させて圧縮
機の回転数を低減する。According to the present invention, there is provided a first means for detecting a relatively high first pressure of a refrigerant for protecting components of an air conditioner in order to solve the above-mentioned problems. A pressure detecting device, wherein when the first pressure detecting device detects the first pressure, at least the compressor is stopped to protect components of the air conditioner, and a second pressure lower than the first pressure is detected. And a suction air temperature detection device for directly or indirectly detecting the temperature of the air heated by the indoor heat exchanger, wherein the second pressure detection device detects the second pressure. In this case, the rotational speed of the compressor is reduced at least in proportion to the amount of indoor air blown by the indoor air blower and inversely proportional to the temperature of the intake air.
【００１３】本発明は、第２の手段として上記課題を解
決するために、第２の圧力検出装置は第２の圧力で開成
もしくは閉成し、第２の圧力より所定値低い第３の圧力
で閉成もしくは開成する圧力スイッチであり、冷媒の比
較的高い温度を直接にもしくは間接的に検出する冷媒温
度検出器を備え、第２の圧力検出装置が第２の圧力を検
出して圧縮機の回転数を低減した後、冷媒温度検出器の
検出値が所定の冷媒温度となるべく圧縮機の回転数を徐
々に増減させる。According to the present invention, as a second means, in order to solve the above-mentioned problem, the second pressure detecting device is opened or closed at the second pressure, and the third pressure is lower by a predetermined value than the second pressure. A pressure switch that closes or opens in the compressor, and includes a refrigerant temperature detector that directly or indirectly detects a relatively high temperature of the refrigerant. After the rotation speed of the compressor is reduced, the rotation speed of the compressor is gradually increased or decreased so that the detected value of the refrigerant temperature detector reaches a predetermined refrigerant temperature.
【００１４】本発明は、第３の手段として上記課題を解
決するために、第２の圧力検出装置は第２の圧力で開成
もしくは閉成し、第２の圧力より所定値低い第３の圧力
で閉成もしくは開成する圧力スイッチであり、第２の圧
力検出装置が第２の圧力を検出して圧縮機の回転数を低
減した後、冷媒圧力は第２の圧力よりも低いが第３の圧
力より高い場合、第２の圧力検出装置が第３の圧力で閉
成もしくは開成するように圧縮機の回転数を徐々に減少
させる。According to the present invention, as a third means, in order to solve the above-mentioned problem, the second pressure detecting device is opened or closed at the second pressure, and the third pressure is lower by a predetermined value than the second pressure. The second pressure detector detects the second pressure and reduces the number of rotations of the compressor, and then the refrigerant pressure is lower than the second pressure but is lower or higher than the third pressure. When the pressure is higher than the pressure, the rotation speed of the compressor is gradually reduced so that the second pressure detection device closes or opens at the third pressure.
【００１５】本発明は、第４の手段として上記課題を解
決するために、第１・２・３の手段において、圧縮機の
回転数が増加することにより冷媒の圧力が上昇して、第
２の圧力検出装置が第２の圧力を検出して圧縮機の回転
数を低減した場合、低減された後の圧縮機の回転数を第
１の回転数とし、第２の圧力検出装置が第２の圧力を検
出した際の室内送風量・吸込空気温度を第１の室内送風
量・第１の吸込空気温度として、室内送風量もしくは吸
込空気温度が、第１の室内送風量より大きくもしくは第
１の吸込空気温度より低くならない限り、圧縮機の回転
数は第１の回転数を最大回転数とする。According to the present invention, as a fourth means, in order to solve the above-mentioned problems, in the first, second and third means, the pressure of the refrigerant increases due to an increase in the number of revolutions of the compressor and the second means. If the pressure detection device detects the second pressure and reduces the rotation speed of the compressor, the reduced rotation speed of the compressor is set to the first rotation speed, and the second pressure detection device The indoor air flow rate or the suction air temperature is detected as the first indoor air flow rate or the first suction air temperature, and the indoor air flow rate or the suction air temperature is greater than the first indoor air flow rate or the first indoor air flow rate. As long as the suction air temperature does not become lower than the first rotation speed, the maximum rotation speed of the compressor is the first rotation speed.
【００１６】本発明は、第５の手段として上記課題を解
決するために、第１・２・３の手段において、室内送風
量が減少もしくは吸込空気温度が上昇することにより冷
媒の圧力が上昇して、第２の圧力検出装置が第２の圧力
を検出して圧縮機の回転数を低減した場合、低減された
後の圧縮機の回転数を第１の回転数とし、低減される前
の圧縮機の回転数を第２の回転数とし、第２の圧力検出
装置が第２の圧力を検出した際の室内送風量・吸込空気
温度を第１の室内送風量・第１の吸込空気温度とし、室
内送風量が減少もしくは吸込空気温度が上昇する前の室
内送風量・吸込空気温度を第２の室内送風量・第２の吸
込空気温度として、室内送風量もしくは吸込空気温度
が、第２の室内送風量もしくは第２の吸込空気温度に復
帰しても、圧縮機の回転数は第２の回転数に復帰させな
い。According to a fifth aspect of the present invention, in order to solve the above-mentioned problems, in the first, second, and third means, the pressure of the refrigerant increases due to a decrease in the amount of air blown into the room or an increase in the temperature of the suction air. When the second pressure detecting device detects the second pressure and reduces the rotational speed of the compressor, the reduced rotational speed of the compressor is set as the first rotational speed, The number of revolutions of the compressor is defined as a second number of revolutions, and the amount of indoor air and the temperature of intake air when the second pressure detecting device detects the second pressure are the first amount of indoor air and the first intake air temperature. The indoor air flow rate or the suction air temperature before the indoor air flow rate decreases or the suction air temperature rises is defined as the second indoor air flow rate and the second suction air temperature, and the indoor air flow rate or the suction air temperature becomes the second air flow rate. Even if the air returns to the indoor air flow rate or the second suction air temperature, Rolling the number does not return to the second speed.
【００１７】[0017]
【作用】本発明の第１の手段によれば、空調装置の部品
保護のために、冷媒の比較的高い第１の圧力を検出する
第１の圧力検出装置を備え、第１の圧力検出装置が第１
の圧力を検出した場合、少なくとも圧縮機を停止させて
空調装置の部品を保護する。よって、万が一、空調装置
の部品保護の必要のある第１の圧力に達した場合、第１
の圧力検出装置にて検出され、少なくとも圧縮機を停止
させるので、空調装置の部品を破壊するに至る圧力には
達せず、空調装置の部品を保護される。According to the first aspect of the present invention, a first pressure detecting device for detecting a relatively high first pressure of refrigerant is provided for protecting components of an air conditioner, and the first pressure detecting device is provided. Is the first
When the pressure is detected, at least the compressor is stopped to protect the components of the air conditioner. Therefore, in the event that the pressure reaches the first pressure which needs to protect the components of the air conditioner, the first pressure
Is detected by the pressure detecting device, and at least the compressor is stopped, so that the pressure does not reach the pressure at which the components of the air conditioner are destroyed, and the components of the air conditioner are protected.
【００１８】また、第１の圧力よりも低い第２の圧力を
検出する第２の圧力検出装置及び室内用熱交換器で加熱
される空気温度を直接にもしくは間接的に検出する吸込
空気温度検出装置を備え、第２の圧力検出装置が第２の
圧力を検出した場合、少なくとも室内用送風装置による
室内送風量に比例し、吸込空気温度に反比例させて圧縮
機の回転数を低減する。よって、圧縮機を停止させる第
１の圧力よりも低い第２の圧力を検出し、その時点で圧
縮機の回転数を低減するので、第１の圧力に至るのを防
止できる。もって、保護装置２９が作動して圧縮機１を
停止させることはない。図２の車両用ヒートポンプ式空
調装置の特性図に示すごとく、冷媒圧力は圧縮機の回転
数の上昇に対して、室内送風量が多ければゆるやかであ
り、室内送風量が少なければ急である。よって、圧力を
同じように下げるには、室内送風量が多ければ圧縮機の
回転数低減量は多く必要であり、室内送風量が少なけれ
ば圧縮機の回転数低減量は少なくて良い。また、冷媒圧
力は圧縮機の回転数の上昇に対して、吸込空気温度が低
ければゆるやかであり、吸込空気温度が高ければ急であ
る。よって、圧力を同じように下げるには、吸込空気温
度が低ければ圧縮機の回転数低減量は多く必要であり、
吸込空気温度が高ければ圧縮機の回転数低減量は少なく
て良い。Further, a second pressure detecting device for detecting a second pressure lower than the first pressure, and a suction air temperature detecting device for directly or indirectly detecting the temperature of the air heated by the indoor heat exchanger. When the second pressure detection device detects the second pressure, the rotation speed of the compressor is reduced in proportion to at least the amount of indoor air blown by the indoor air blower and inversely proportional to the temperature of the suction air. Therefore, the second pressure lower than the first pressure for stopping the compressor is detected, and the rotation speed of the compressor is reduced at that time, so that the first pressure can be prevented. Therefore, the protection device 29 does not operate to stop the compressor 1. As shown in the characteristic diagram of the heat pump air conditioner for a vehicle shown in FIG. 2, the refrigerant pressure is moderate when the indoor air flow rate is large and is sharp when the indoor air flow rate is small with respect to the increase in the rotation speed of the compressor. Therefore, in order to reduce the pressure in the same manner, the amount of reduction in the number of revolutions of the compressor is required if the amount of indoor air is large, and the amount of reduction in the number of rotations of the compressor is small if the amount of indoor air is small. In addition, the refrigerant pressure is low when the suction air temperature is low and high when the suction air temperature is high with respect to the increase in the rotation speed of the compressor. Therefore, to reduce the pressure in the same way, if the suction air temperature is low, the amount of reduction in the number of rotations of the compressor is necessary,
If the intake air temperature is high, the reduction in the number of revolutions of the compressor may be small.
【００１９】従って、圧縮機の回転数低減量は室内送風
量に比例し、吸込空気温度に反比例させれば、各種条件
で同一の圧力低減を図ることができる。Therefore, if the amount of reduction in the number of revolutions of the compressor is proportional to the amount of air blown into the room and is inversely proportional to the temperature of the suction air, the same pressure reduction can be achieved under various conditions.
【００２０】尚、圧縮機の回転数を低減する代わりに、
室内熱交換器５の吸込空気が比較的低温の車室外空気で
ある場合、室内用送風装置６による送風量を増加させた
り、室内熱交換器５の吸込空気が比較的高温の車室内空
気である場合、導入空気切替装置２６にて比較的低温の
車室外空気に切り換えても良いが、この場合乗員にとっ
ては意図しない作動をすることになり、乗員を驚かすこ
とになるので好ましくない。Incidentally, instead of reducing the rotation speed of the compressor,
When the suction air of the indoor heat exchanger 5 is relatively low temperature outside air, the amount of air blown by the indoor blower 6 is increased, or the suction air of the indoor heat exchanger 5 is relatively high temperature of the vehicle interior air. In some cases, the air may be switched to relatively low-temperature outside air by the introduction air switching device 26. However, in this case, an unintended operation is performed for the occupant, which is not preferable because the occupant is surprised.
【００２１】本発明の第２の手段によれば、第２の圧力
検出装置が第２の圧力を検出して圧縮機の回転数を低減
した後、冷媒温度検出器の検出値が所定の冷媒温度とな
るべく圧縮機の回転数を徐々に増減させる。According to the second aspect of the present invention, after the second pressure detecting device detects the second pressure and reduces the rotational speed of the compressor, the detected value of the refrigerant temperature detector is changed to a predetermined refrigerant. The compressor speed is gradually increased or decreased to reach the temperature.
【００２２】よって、冷媒の温度と圧力の上昇下降は相
関があるので、何かの要因もしくは、予め制御装置に記
憶されている回転数の低減量が適切でなく低減後の回転
数が適切でない場合、また冷媒温度そのものの調節、ま
た冷媒温度を基準として吹出空気温度を調節する場合な
どにおいて、冷媒温度検出器の検出値が所定の冷媒温度
となるべく圧縮機の回転数を徐々に増減させることによ
り、回転数を適切に補正することができる。Therefore, since there is a correlation between the temperature of the refrigerant and the rise and fall of the pressure, some factor or the amount of reduction in the number of revolutions stored in the control device in advance is not appropriate, and the number of revolutions after the reduction is not appropriate. In such cases, when adjusting the refrigerant temperature itself, or when adjusting the blow-out air temperature based on the refrigerant temperature, gradually increase or decrease the rotational speed of the compressor so that the detected value of the refrigerant temperature detector becomes a predetermined refrigerant temperature. Thus, the rotation speed can be appropriately corrected.
【００２３】第２の圧力検出装置は第２の圧力で開成も
しくは閉成し、第２の圧力より所定値低い第３の圧力で
閉成もしくは開成する圧力スイッチである。よって、第
２の圧力検出装置は従来の空調装置の部品保護のための
第１の圧力検出装置と同様に、圧力検出は連続でなくて
よく、検出値を変更したもので使用可能であり、特殊な
圧力検出装置を用いる必要はない。The second pressure detecting device is a pressure switch that opens or closes at a second pressure and closes or opens at a third pressure lower than the second pressure by a predetermined value. Therefore, like the first pressure detection device for protecting the components of the conventional air conditioner, the second pressure detection device does not need to perform continuous pressure detection, and can be used with a changed detection value. It is not necessary to use a special pressure detecting device.
【００２４】また、冷媒の比較的高い温度を直接にもし
くは間接的に検出する冷媒温度検出器を備えている。冷
媒温度検出器は通常の温度センサとして使用されるサー
ミスタで良く、一般的な部品で良い。Further, a refrigerant temperature detector for directly or indirectly detecting a relatively high temperature of the refrigerant is provided. The refrigerant temperature detector may be a thermistor used as a normal temperature sensor, and may be a general component.
【００２５】本発明の第３の手段によれば、第２の圧力
検出装置は第２の圧力で開成もしくは閉成し、第２の圧
力より所定値低い第３の圧力で閉成もしくは開成する圧
力スイッチである。これは、上記第２の手段と同様であ
る。According to the third aspect of the present invention, the second pressure detecting device opens or closes at the second pressure, and closes or opens at a third pressure lower than the second pressure by a predetermined value. It is a pressure switch. This is similar to the second means.
【００２６】ここで、第２の圧力検出装置が第２の圧力
を検出して圧縮機の回転数を低減した後、冷媒圧力は第
２の圧力よりも低いが第３の圧力より高い場合、第２の
圧力検出装置が第３の圧力で閉成もしくは開成するよう
に圧縮機の回転数を徐々に減少させる。よって、上記第
２の手段と同様何かの要因もしくは、予め制御装置に記
憶されている回転数の低減量が適切でなく、充分に圧力
が低下していない場合は、第２の圧力検出装置が第３の
圧力で閉成もしくは開成するように圧縮機の回転数を徐
々に減少させることにより、適切な圧力まで低下させる
ことができる。Here, after the second pressure detecting device detects the second pressure and reduces the rotational speed of the compressor, if the refrigerant pressure is lower than the second pressure but higher than the third pressure, The rotation speed of the compressor is gradually reduced so that the second pressure detecting device closes or opens at the third pressure. Therefore, if there is any factor similar to the above-mentioned second means or the amount of reduction in the number of revolutions previously stored in the control device is not appropriate and the pressure is not sufficiently reduced, the second pressure detecting device The pressure can be reduced to an appropriate pressure by gradually reducing the rotation speed of the compressor so that the compressor is closed or opened at the third pressure.
【００２７】本発明の第４の手段によれば、第１・２・
３の手段において、圧縮機の回転数が増加することによ
り冷媒の圧力が上昇して、第２の圧力検出装置が第２の
圧力を検出して圧縮機の回転数を低減した場合、低減さ
れた後の圧縮機の回転数を第１の回転数とし、第２の圧
力検出装置が第２の圧力を検出した際の室内送風量・吸
込空気温度を第１の室内送風量・第１の吸込空気温度と
して、室内送風量もしくは吸込空気温度が、第１の室内
送風量より大きくもしくは第１の吸込空気温度より低く
ならない限り、圧縮機の回転数は第１の回転数を最大回
転数とする。According to the fourth aspect of the present invention, the first, second, and second steps are performed.
In the third means, when the rotation speed of the compressor increases and the pressure of the refrigerant increases, and the second pressure detection device detects the second pressure and reduces the rotation speed of the compressor, the pressure is reduced. The rotation speed of the compressor after the first pressure is set to a first rotation speed, and the indoor air flow rate / intake air temperature when the second pressure detecting device detects the second pressure is determined by the first indoor air flow rate / first air flow rate. As the suction air temperature, unless the indoor air flow rate or the suction air temperature is higher than the first indoor air flow rate or lower than the first suction air temperature, the rotation speed of the compressor is determined by setting the first rotation speed to the maximum rotation speed. I do.
【００２８】このため、以降圧縮機の回転数が変更され
ても、その最大回転数は第１の回転数であるので、室内
送風量・吸込空気温度が変わらなければ、冷媒の圧力が
上昇して、第２の圧力検出装置が第２の圧力を検出して
圧縮機の回転数を低減することは無い。よって、再三第
２の圧力検出装置が作動して、圧縮機の回転数が変動
し、吹出空気温度が変動して、もって乗員に違和感を与
えることを防止できる。For this reason, even if the rotational speed of the compressor is changed thereafter, the maximum rotational speed is the first rotational speed. Therefore, if the indoor air flow rate and the suction air temperature do not change, the pressure of the refrigerant increases. Therefore, the second pressure detecting device does not detect the second pressure and reduce the rotational speed of the compressor. Therefore, it is possible to prevent the second and second pressure detecting devices from being operated, the rotational speed of the compressor fluctuating, and the temperature of the blown air fluctuating, thereby giving the occupant an uncomfortable feeling.
【００２９】本発明の第５の手段によれば、第１・２・
３の手段において、室内送風量が減少もしくは吸込空気
温度が上昇することにより冷媒の圧力が上昇して、第２
の圧力検出装置が第２の圧力を検出して圧縮機の回転数
を低減した場合、低減された後の圧縮機の回転数を第１
の回転数とし、低減される前の圧縮機の回転数を第２の
回転数とし、第２の圧力検出装置が第２の圧力を検出し
た際の室内送風量・吸込空気温度を第１の室内送風量・
第１の吸込空気温度とし、室内送風量が減少もしくは吸
込空気温度が上昇する前の室内送風量・吸込空気温度を
第２の室内送風量・第２の吸込空気温度として、室内送
風量もしくは吸込空気温度が、第２の室内送風量もしく
は第２の吸込空気温度に復帰しても、圧縮機の回転数は
第２の回転数に復帰させない。According to the fifth means of the present invention, the first, second, and second steps are performed.
In the means of (3), the pressure of the refrigerant increases due to a decrease in the amount of air blown into the room or an increase in the temperature of the suction air.
When the pressure detection device detects the second pressure and reduces the rotation speed of the compressor, the reduced rotation speed of the compressor is set to the first rotation speed.
, The rotational speed of the compressor before being reduced is defined as a second rotational speed, and the amount of indoor air blown / intake air temperature when the second pressure detecting device detects the second pressure is defined as the first rotational speed. Indoor air volume
The indoor air flow rate or the suction air temperature before the indoor air flow rate decreases or the suction air temperature rises as the second indoor air flow rate and the second suction air temperature as the first intake air temperature. Even if the air temperature returns to the second indoor air supply amount or the second suction air temperature, the rotation speed of the compressor does not return to the second rotation speed.
【００３０】これにより、室内送風量が減少もしくは導
入空気が車室内空気となって吸込空気温度が上昇したこ
とにより、一旦圧縮機の回転数を低減した場合、室内送
風量もしくは導入空気を元に戻しても、圧縮機の回転数
は元に戻らない。Thus, when the rotational speed of the compressor is once reduced due to a decrease in the amount of indoor air blown or an increase in the intake air temperature due to the intake air becoming the vehicle interior air, the indoor air flow or the amount of introduced air is reduced. When it is returned, the rotation speed of the compressor is not restored.
【００３１】よって、比較的乗員が操作することの多い
室内用送風装置６、導入空気切替装置２６を操作されて
も、一旦圧縮機の回転数を低減した以降は、再三第２の
圧力検出装置が作動することは無い。もって、圧縮機の
回転数が変動し、吹出空気温度が変動して、乗員に違和
感を与えることを防止できる。Therefore, even if the indoor air blower 6 and the introduced air switching device 26, which are often operated by the occupant, are operated, once the rotational speed of the compressor is once reduced, the second pressure detecting device is repeated. Does not work. Accordingly, it is possible to prevent the rotational speed of the compressor from fluctuating and the temperature of the blown air from fluctuating, thereby giving the occupant a sense of discomfort.
【００３２】但し、例えば暖冷房運転能力調節装置２５
にて圧縮機の回転数を変更する場合には、変更可能であ
る。また、暖冷房運転能力調節装置２５における調節能
力の最大を示す位置においては、能力が固定され調節不
可となることを防止するために、室内送風量もしくは導
入空気を元に戻せば、圧縮機の回転数は元に戻す必要が
ある。However, for example, the heating / cooling operation capacity adjusting device 25
When changing the number of revolutions of the compressor at, the change can be made. In addition, at the position where the heating / cooling operation capacity adjusting device 25 shows the maximum adjustment capacity, in order to prevent the capacity from being fixed and uncontrollable, if the indoor air flow or the introduced air is returned to the original level, the compressor The number of revolutions needs to be restored.
【００３３】[0033]
【実施例】本発明の実施例を図面により説明する。図１
に本発明の実施例に係る車両用ヒートポンプ式空調装置
の構成図を示す。ここで前出の図８従来の車両用ヒート
ポンプ式空調装置の構成図と比較すると、本発明の実施
例には、図８従来例に比べ車室内温度検出器３１、車室
外温度検出器３２、吸込空気温度検出器３３、制御装置
３４及び第２の圧力検出装置３５が追加されている。BRIEF DESCRIPTION OF THE DRAWINGS FIG. FIG.
1 shows a configuration diagram of a vehicle heat pump air conditioner according to an embodiment of the present invention. Here, as compared with the configuration diagram of the conventional vehicle heat pump air conditioner shown in FIG. 8, the embodiment of the present invention has a vehicle interior temperature detector 31, a vehicle exterior temperature detector 32, A suction air temperature detector 33, a control device 34, and a second pressure detection device 35 are added.
【００３４】また、制御装置３４が、冷房・暖房の判定
のために暖冷房運転切替装置２５へ、冷媒圧力検出のた
めに第２の圧力検出装置３５へ、冷媒温度検出のために
吐出温検出装置（冷媒温度検出器）２８へ、室内送風量
検出のために風量調節装置２３へ、吸込空気温度検出の
ために吸込空気温度検出器３３へ、さらに吸込空気温度
を間接的に検出するために車室内温度検出器３１・車室
外温度検出器３２・導入空気切替装置２６へ、圧縮機の
回転数を制御するために電動機駆動装置９へ接続されて
いる。Further, the control unit 34 controls the heating / cooling operation switching unit 25 for cooling / heating determination, the second pressure detection unit 35 for refrigerant pressure detection, and the discharge temperature detection for refrigerant temperature detection. To the device (refrigerant temperature detector) 28, to the air volume adjusting device 23 for indoor air flow detection, to the suction air temperature detector 33 for suction air temperature detection, and to indirectly detect the suction air temperature The vehicle interior temperature detector 31, the exterior temperature detector 32, and the introduced air switching device 26 are connected to the motor drive device 9 for controlling the rotation speed of the compressor.
【００３５】ここで吸込空気温度の間接的検出について
は、車室内温度を車室内温度検出器３１で検出し、車室
外温度を車室外温度検出器３２で検出し、導入空気を導
入空気切替装置２６で検出して、吸込空気が車室内空気
であれば車室内温度を、車室外空気であれば車室外温度
を、両者を混合した空気であればその混合比率で車室内
温度・車室外温度から算出した温度をそれぞれ若干の補
正を施して吸込空気温度とすれば良い。Here, regarding the indirect detection of the intake air temperature, the vehicle interior temperature is detected by the vehicle interior temperature detector 31, the vehicle exterior temperature is detected by the vehicle exterior temperature detector 32, and the introduced air is supplied to the introduced air switching device. 26, the temperature inside the vehicle if the intake air is the air inside the vehicle, the temperature outside the vehicle if the air outside the vehicle is mixed, and the mixture ratio of the air if the air is a mixture of the two. The temperature calculated from the above may be slightly corrected to obtain the suction air temperature.
【００３６】車室内を暖房する場合、暖冷房運転切替装
置２５にて四方切替え弁７を図１の実線のように設定す
る。吐出冷媒は圧縮機１にて室内熱交換器５に導かれ
る。次に、室内用送風装置６により送風された空気を加
熱して冷媒は凝縮液化し、冷媒絞り装置４を介して室外
熱交換器２に運ばれ、室外熱交換器用送風装置３により
送風された空気を冷却して蒸発する。また、暖房運転で
あることの情報が、暖冷房運転切替装置２５より制御装
置３４に送られ、制御装置３４は暖房運転であると判断
し、以下の必要な制御を行う。When heating the vehicle interior, the heating / cooling operation switching device 25 sets the four-way switching valve 7 as shown by the solid line in FIG. The discharged refrigerant is guided to the indoor heat exchanger 5 by the compressor 1. Next, the air blown by the indoor blower 6 is heated, the refrigerant is condensed and liquefied, carried to the outdoor heat exchanger 2 via the refrigerant expansion device 4, and blown by the outdoor heat exchanger blower 3. The air cools and evaporates. Further, information indicating that the heating operation is being performed is sent from the heating / cooling operation switching device 25 to the control device 34, and the control device 34 determines that the heating operation is being performed, and performs the following necessary control.
【００３７】図３に本発明の請求項１に係る車両用ヒー
トポンプ式空調装置の作動図を示す。図３左に、圧縮機
の制限回転数の例を示す。FIG. 3 shows an operation diagram of the vehicle heat pump air conditioner according to claim 1 of the present invention. FIG. 3 left shows an example of the limit rotational speed of the compressor.
【００３８】図２の車両用ヒートポンプ式空調装置の特
性図データから、室内送風量を横軸にし、吸込空気温度
をパラメーターとして、冷媒圧力を２４５×１０4Ｐａ
以下とするための圧縮機の制限回転数を縦軸に示してい
る。この冷媒圧力２４５×１０4Ｐａは、少なくとも圧
縮機を停止させて空調装置の部品を保護する第１の圧力
は２６５×１０4Ｐａとして、それより２０×１０4Ｐａ
小さい値（第２の圧力）として設定している。但し、こ
の値は、おおよそであり、空調装置の各種部品、冷媒
量、車両等のばらつきにより変動する。空調装置を作動
させる際、圧縮機の回転数は上記制限回転数の値に、室
内送風量、吸込空気温度を基にして、制限される。From the characteristic diagram data of the heat pump air conditioner for a vehicle shown in FIG. 2, the refrigerant pressure is set to 245 × 10 4 Pa, with the horizontal air flow as the horizontal axis and the suction air temperature as a parameter.
The vertical axis indicates the limit rotational speed of the compressor for the following. This refrigerant pressure of 245 × 10 4 Pa is at least 265 × 10 4 Pa, the first pressure for stopping the compressor and protecting the components of the air conditioner, and 20 × 10 4 Pa
It is set as a small value (second pressure). However, this value is approximate and fluctuates due to variations in various components of the air conditioner, the amount of refrigerant, vehicles, and the like. When operating the air conditioner, the number of revolutions of the compressor is limited to the value of the above-mentioned limited number of revolutions based on the amount of air blown into the room and the temperature of the intake air.
【００３９】図３右に圧縮機の回転数低減量の例を示
す。図２の車両用ヒートポンプ式空調装置の特性図デー
タから、室内送風量を横軸にし、吸込空気温度をパラメ
ーターとして、冷媒圧力を４９×１０4Ｐａ低減する圧
縮機の回転数低減量を縦軸に示している。但し、この値
も上記圧縮機の制限回転数の例と同様に、おおよそであ
り、空調装置の各種部品、冷媒量、車両等のばらつきに
より変動する。FIG. 3 shows an example of the amount of reduction in the number of revolutions of the compressor. From the characteristic diagram data of the vehicle heat pump air conditioner of FIG. 2, the horizontal axis indicates the amount of air blown into the room, and the vertical axis indicates the amount of reduction in the number of revolutions of the compressor that reduces the refrigerant pressure by 49 × 10 4 Pa, using the suction air temperature as a parameter. Is shown in However, this value is also approximate, as in the case of the above-mentioned limit speed of the compressor, and fluctuates due to variations in various components of the air conditioner, the amount of refrigerant, vehicles, and the like.
【００４０】上記圧縮機の制限回転数で暖房運転して
も、この値は、おおよそであるので、冷媒圧力は２４５
×１０4Ｐａを超えて、第２の圧力検出装置３５が作動
する場合がある。この時、室内送風量、吸込空気温度を
基にして圧縮機の回転数低減量が決められ、回転数が低
減される。Even if the compressor is operated at the limited rotation speed for heating, this value is approximate, and the refrigerant pressure is 245.
When the pressure exceeds × 10 4 Pa, the second pressure detecting device 35 may operate. At this time, the rotational speed reduction amount of the compressor is determined based on the indoor air flow and the suction air temperature, and the rotational speed is reduced.
【００４１】例えば、室内送風量１２５ｍ3／ｈ、吸込
空気温度１０℃の場合、制限回転数は６９S -1であり、
回転数低減量は１４S -1であるので、低減後の回転数は
５５S - 1となる。上記データはさらに多くのデータを追
加し、テーブルデータもしくは関係式に表現して、制御
装置３４のマイコンメモリーに格納され、室内送風量、
吸込空気温度を基にして演算される。For example, when the indoor air flow rate is 125 m 3 / h and the intake air temperature is 10 ° C., the rotational speed limit is 69 S -1 .
The engine speed reduction amount is the 14 S -1, speed after reduction is 55 S - is one. The above data is obtained by adding more data, expressing the data in table data or a relational expression, and storing the data in the microcomputer memory of the control device 34, the indoor air flow rate,
It is calculated based on the intake air temperature.
【００４２】よって、第１の圧力よりも低い第２の圧力
を検出し、その時点で圧縮機の回転数を低減するので、
第１の圧力に至るのを防止でき、保護装置２９が作動し
て圧縮機１を停止させることを防止できる。また、圧縮
機の回転数低減量は室内送風量に比例し、吸込空気温度
に反比例させるので、各種条件で同一の圧力低減を図る
ことができる。Accordingly, the second pressure lower than the first pressure is detected, and the rotation speed of the compressor is reduced at that time.
It is possible to prevent the first pressure from being reached, and prevent the protection device 29 from operating and stopping the compressor 1. Further, since the amount of reduction in the number of revolutions of the compressor is proportional to the amount of air blown into the room and inversely proportional to the temperature of the intake air, the same pressure reduction can be achieved under various conditions.
【００４３】図４に、本発明の請求項２に係る車両用ヒ
ートポンプ式空調装置の作動図を示す。作動は以下の通
りである。FIG. 4 shows an operation diagram of a vehicle heat pump type air conditioner according to a second aspect of the present invention. The operation is as follows.
【００４４】時間ｔ１まで圧縮機１の回転数は４
０S -1、導入空気は車室外空気１０℃で吸込空気温度も
１０℃とする、室内送風量は１２５ｍ3／ｈ、冷媒温度
は５８℃、冷媒圧力は１３７×１０4Ｐａである。時間
ｔ１にて、圧縮機１の回転数が６９S -1に上げられる。
これは、暖冷房運転能力調節装置２２によって手動によ
っても、自動による場合も同じである。冷媒温度、冷媒
圧力は上昇し、冷媒圧力２４５×１０4Ｐａを第２の圧
力検出装置３５が時間ｔ２にて検出する。ここで、制御
装置３４が、室内送風量１２５ｍ3／ｈ、吸込空気温度
１０℃の場合の回転数低減量１４S -1から低減後の回転
数５５S -1を演算し電動機駆動装置９に出力する。もっ
て、時間ｔ３にて圧縮機１の回転数は５５S -1、冷媒温
度は７０℃、冷媒圧力は１６７×１０4Ｐａとなる。こ
こで、冷媒温度を７５℃とすべく、圧縮機１の回転数を
図４のごとく徐々に上げて、時間ｔ４にて圧縮機１の回
転数は５７S - 1、冷媒温度は７５℃、冷媒圧力は１９６
×１０4Ｐａとなる。よって、何かの要因もしくは、予
め制御装置に記憶されている回転数の低減量が適切でな
く、低減後の回転数が適切でない場合、冷媒温度検出器
の検出値が所定の冷媒温度となるべく圧縮機の回転数を
徐々に増減させることにより、回転数を適切に補正する
ことができる。The rotation speed of the compressor 1 is 4 until time t1.
0S -1, Introducing air is 10 ° C outside the vehicle and the suction air temperature is also
10 ° C, indoor air flow is 125mThree/ H, refrigerant temperature
Is 58 ° C, refrigerant pressure is 137 × 10FourPa. time
At t1, the rotation speed of the compressor 1 is 69.S -1Can be raised.
This is manually performed by the heating / cooling operation capacity adjusting device 22.
However, the same applies to the case of automatic operation. Refrigerant temperature, refrigerant
The pressure rises and the refrigerant pressure is 245 × 10FourPa is the second pressure
Force detection device 35 detects at time t2. Where control
The device 34 has an indoor air flow rate of 125 m.Three/ H, suction air temperature
Rotational speed reduction amount at 10 ° C 14S -1Rotation after reduction from
Number 55S -1Is calculated and output to the motor driving device 9. Mo
Thus, at time t3, the rotation speed of the compressor 1 is 55S -1, Refrigerant temperature
The temperature is 70 ° C and the refrigerant pressure is 167 × 10FourPa. This
Here, in order to keep the refrigerant temperature at 75 ° C., the rotation speed of the compressor 1 is increased.
As shown in FIG. 4, gradually raise the compressor 1 at time t4.
Number of turns is 57S - 1, Refrigerant temperature is 75 ° C, refrigerant pressure is 196
× 10FourPa. Therefore, some factor or
The amount of reduction in the number of revolutions stored in the
If the reduced rotation speed is not appropriate,
The rotational speed of the compressor should be adjusted so that the detected value of
Correct rotation speed appropriately by gradually increasing or decreasing
be able to.
【００４５】図５に本発明の請求項３・４に係る車両用
ヒートポンプ式空調装置の作動図を示す。FIG. 5 shows an operation diagram of a vehicle heat pump air conditioner according to claims 3 and 4 of the present invention.
【００４６】請求項３に係る作動図は時間ｔ２までは、
上記図４と同じである。この後、制御装置３４が、室内
送風量１２５ｍ3／ｈ、吸込空気温度１０℃の場合の回
転数低減量１４S -1から低減後の回転数５５S -1を演算し
電動機駆動装置９に出力する。ここで、時間ｔ３にて圧
縮機１の回転数は５５S -1となるが、上記図４とは異な
り冷媒温度は８０℃、冷媒圧力は２１０×１０4Ｐａと
なる。ここで、冷媒圧力を１９６×１０4Ｐａとすべ
く、第２の圧力検出装置３５が閉成もしくは開成するよ
うに、圧縮機１の回転数を図５のごとく徐々に上げる。
もって、時間ｔ４にて圧縮機１の回転数は５３S -1、冷
媒温度は７５℃、冷媒圧力は１９６×１０4Ｐａとな
る。よって、何かの要因もしくは、予め制御装置に記憶
されている回転数の低減量が適切でなく、充分に圧力が
低下していない場合は、第２の圧力検出装置が第３の圧
力で閉成もしくは開成するように圧縮機の回転数を徐々
に減少させることにより、適切な圧力まで低下させるこ
とができる。In the operation diagram according to the third aspect, until time t2,
This is the same as FIG. Thereafter, the control device 34 calculates the reduced rotation speed 55 S −1 from the reduced rotation speed 14 S −1 when the indoor air flow rate is 125 m 3 / h and the intake air temperature is 10 ° C. Output. Here, at time t3, the rotation speed of the compressor 1 is 55 S -1 , but unlike FIG. 4 described above, the refrigerant temperature is 80 ° C. and the refrigerant pressure is 210 × 10 4 Pa. Here, in order to set the refrigerant pressure to 196 × 10 4 Pa, the rotation speed of the compressor 1 is gradually increased as shown in FIG. 5 so that the second pressure detection device 35 is closed or opened.
Accordingly, at time t4, the rotation speed of the compressor 1 becomes 53 S -1 , the refrigerant temperature becomes 75 ° C., and the refrigerant pressure becomes 196 × 10 4 Pa. Therefore, if for some reason or the amount of reduction in the number of revolutions previously stored in the control device is not appropriate and the pressure is not sufficiently reduced, the second pressure detection device closes at the third pressure. By gradually reducing the number of revolutions of the compressor so as to form or open, the pressure can be reduced to an appropriate pressure.
【００４７】請求項４によれば、この状態で、圧縮機１
の回転数は最大５３S -1となる。よって、再度冷媒温
度、冷媒圧力が上昇することは無い、よって、再三第２
の圧力検出装置が作動して、圧縮機の回転数が変動し、
吹出空気温度が変動して、もって乗員に違和感を与える
ことを防止できる。また、圧縮機を含めて空調装置の作
動を安定させ、もって信頼性を向上できる。但し、図５
の右方に示すように、例えば室内送風量を増加させるこ
とにより、圧縮機１の回転数を増加させることが可能と
なる。According to claim 4, in this state, the compressor 1
Is 53 S -1 at the maximum. Therefore, the refrigerant temperature and the refrigerant pressure do not increase again.
The pressure detector operates, and the rotation speed of the compressor fluctuates.
It can be prevented that the blown air temperature fluctuates and gives an occupant an uncomfortable feeling. Further, the operation of the air conditioner including the compressor can be stabilized, thereby improving the reliability. However, FIG.
As shown on the right side, for example, it is possible to increase the number of revolutions of the compressor 1 by increasing the amount of air blown into the room.
【００４８】図６に本発明の請求項５に係る車両用ヒー
トポンプ式空調装置の作動図を示す。時間ｔ１まで圧縮
機１の回転数は７２S -1、導入空気は車室外空気１０℃
で吸込空気温度も１０℃とする、室内送風量は２００ｍ
3／ｈ、冷媒温度は７５℃、冷媒圧力は１９６×１０4Ｐ
ａである。時間ｔ１にて、室内送風量が１２５ｍ3／ｈ
に下げられる。これは、風量調節装置２３によって手動
によっても、自動による場合も同じである。ここで、室
内送風量１２５ｍ3／ｈ、吸込空気温度１０℃を基にし
て、圧縮機１の回転数は制限回転数の値６９S -1とな
る。室内送風量が減少するので、冷媒温度、冷媒圧力は
上昇し、冷媒圧力２４５×１０4Ｐａを第２の圧力検出
装置３５が時間ｔ２にて検出する。ここで、制御装置３
４が、室内送風量１２５ｍ3／ｈ、吸込空気温度１０℃
の場合の回転数低減量１４S -1から低減後の回転数５５S
-1を演算し電動機駆動装置９に出力する。もって、時間
ｔ３にて圧縮機１の回転数は５５S -1、冷媒温度は７５
℃、冷媒圧力は１９６×１０4Ｐａとなる。FIG. 6 shows an operation diagram of a vehicle heat pump air conditioner according to claim 5 of the present invention. Until time t1, the rotation speed of the compressor 1 is 72 S -1 , and the introduced air is 10 ° C. outside the vehicle compartment.
And the temperature of the intake air is 10 ° C.
3 / h, refrigerant temperature 75 ° C, refrigerant pressure 196 × 10 4 P
a. At time t1, the indoor air flow rate is 125 m 3 / h
Can be lowered. This is the same whether the operation is performed manually or automatically by the air volume adjusting device 23. Here, the rotational speed of the compressor 1 becomes the value of the limit rotational speed 69 S −1 based on the indoor air flow rate of 125 m 3 / h and the suction air temperature of 10 ° C. Since the indoor air flow decreases, the refrigerant temperature and the refrigerant pressure increase, and the second pressure detection device 35 detects the refrigerant pressure of 245 × 10 4 Pa at time t2. Here, the control device 3
4, indoor air flow rate 125m 3 / h, suction air temperature 10 ° C
Rotates from the rotational speed reduction amount 14 S -1 after reduction when the number 55 S
-1 is calculated and output to the motor driving device 9. Therefore, at time t3, the rotation speed of the compressor 1 is 55 S -1 and the refrigerant temperature is 75 S -1 .
C. and the refrigerant pressure is 196 × 10 4 Pa.
【００４９】ここで、時間ｔ４にて室内送風量を元の値
２００ｍ3／ｈに戻しても、圧縮機１の回転数は元の値
には戻らない。Here, even if the indoor air flow rate is returned to the original value of 200 m 3 / h at time t4, the rotation speed of the compressor 1 does not return to the original value.
【００５０】よって、比較的乗員が操作することの多い
室内用送風装置６を操作されても、一旦圧縮機の回転数
を低減した以降は、再三第２の圧力検出装置が作動する
ことは無い。もって、圧縮機の回転数が変動し、吹出空
気温度が変動して、乗員に違和感を与えることを防止で
きる。また、圧縮機を含めて空調装置の作動を安定さ
せ、もって信頼性を向上できる。導入空気切替装置２６
を操作される場合も同様である。Therefore, even if the indoor blower 6 which is often operated by the occupant is operated, once the rotational speed of the compressor is once reduced, the second pressure detecting device does not operate again. . Accordingly, it is possible to prevent the rotational speed of the compressor from fluctuating and the temperature of the blown air from fluctuating, thereby giving the occupant a sense of discomfort. Further, the operation of the air conditioner including the compressor can be stabilized, thereby improving the reliability. Introductory air switching device 26
The same applies to the case where is operated.
【００５１】尚、本実施例に限らず本発明の主旨を満た
す範囲で種々の方法が可能である。熱交換器の配置、台
数、構成などにおいても、本発明の主旨を満たす範囲で
種々の応用が可能である。The present invention is not limited to this embodiment, and various methods are possible within a range that satisfies the gist of the present invention. Various applications are also possible in the arrangement, number, configuration, and the like of the heat exchangers as long as the gist of the present invention is satisfied.
【００５２】[0052]
【発明の効果】請求項１の手段によれば、少なくとも圧
縮機を停止させて空調装置の部品を保護する第１の圧力
よりも低い第２の圧力を検出する第２の圧力検出装置及
び室内用熱交換器で加熱される空気温度を直接にもしく
は間接的に検出する吸込空気温度検出装置を備え、第２
の圧力検出装置が第２の圧力を検出した場合、少なくと
も室内用送風装置による室内送風量に比例し、吸込空気
温度に反比例させて圧縮機の回転数を低減する。よっ
て、第１の圧力よりも低い第２の圧力を検出し、その時
点で圧縮機の回転数を低減するので、第１の圧力に至る
のを防止できる。もって、保護装置２９が作動して圧縮
機１を停止させることを防止できる。According to the first aspect of the present invention, at least the compressor is stopped to detect the second pressure lower than the first pressure for protecting the components of the air conditioner, and the room. A suction air temperature detecting device for directly or indirectly detecting the temperature of the air heated by the
When the pressure detecting device detects the second pressure, the rotational speed of the compressor is reduced in proportion to at least the amount of indoor air blown by the indoor air blower and inversely proportional to the suction air temperature. Therefore, the second pressure lower than the first pressure is detected, and the rotation speed of the compressor is reduced at that time, so that the first pressure can be prevented. Thus, it is possible to prevent the protection device 29 from operating and stopping the compressor 1.
【００５３】冷媒圧力は圧縮機の回転数の上昇に対し
て、室内送風量が多ければゆるやかであり、室内送風量
が少なければ急である。よって、圧力を同じように下げ
るには、室内送風量が多ければ圧縮機の回転数低減量は
多く必要であり、室内送風量が少なければ圧縮機の回転
数低減量は少なくて良い。また、冷媒圧力は圧縮機の回
転数の上昇に対して、吸込空気温度が低ければゆるやか
であり、吸込空気温度が高ければ急である。よって、圧
力を同じように下げるには、吸込空気温度が低ければ圧
縮機の回転数低減量は多く必要であり、吸込空気温度が
高ければ圧縮機の回転数低減量は少なくて良い。Refrigerant pressure is moderate when the indoor air flow rate is large, and is sharp when the indoor air flow rate is small, with respect to an increase in the rotational speed of the compressor. Therefore, in order to reduce the pressure in the same manner, the amount of reduction in the number of revolutions of the compressor is required if the amount of indoor air is large, and the amount of reduction in the number of rotations of the compressor is small if the amount of indoor air is small. In addition, the refrigerant pressure is low when the suction air temperature is low and high when the suction air temperature is high with respect to the increase in the rotation speed of the compressor. Therefore, in order to decrease the pressure in the same manner, the amount of reduction in the number of rotations of the compressor is necessary if the suction air temperature is low, and the amount of reduction in the number of rotations of the compressor is small if the suction air temperature is high.
【００５４】従って、圧縮機の回転数低減量は室内送風
量に比例し、吸込空気温度に反比例させるので、各種条
件で同一の圧力低減を図ることができる。Therefore, the amount of reduction in the number of revolutions of the compressor is proportional to the amount of air blown into the room, and is inversely proportional to the temperature of the intake air, so that the same pressure can be reduced under various conditions.
【００５５】また、室内熱交換器５の吸込空気が比較的
低温の車室外空気である場合、室内用送風装置６による
送風量を増加させたり、室内熱交換器５の吸込空気が比
較的高温の車室内空気である場合、導入空気切替装置２
６にて比較的低温の車室外空気に切り換えても圧力を下
げられるが、この方法は乗員にとっては意図しない作動
をすることになり、乗員を驚かすことになるので好まし
くない。よって、圧縮機の回転数を低減することで乗員
を驚かすことはない。When the intake air of the indoor heat exchanger 5 is the outside air of the vehicle at a relatively low temperature, the amount of air blown by the indoor blower 6 is increased, or the intake air of the indoor heat exchanger 5 is at a relatively high temperature. If it is the vehicle interior air, the introduced air switching device 2
Although the pressure can be reduced by switching to the relatively low temperature outside air at 6, this method is not preferable because the occupant operates unintentionally and surprises the occupant. Therefore, the occupant is not surprised by reducing the rotation speed of the compressor.
【００５６】請求項２の手段によれば、第２の圧力検出
装置は第２の圧力で開成もしくは閉成し、第２の圧力よ
り所定値低い第３の圧力で閉成もしくは開成する圧力ス
イッチである。よって、第２の圧力検出装置は従来の空
調装置の部品保護のための第１の圧力検出装置と同様
に、圧力検出は連続でなくてよく、検出値を変更したも
ので使用可能であり、特殊な圧力検出装置を用いる必要
はない。According to the second aspect of the present invention, the second pressure detecting device is opened or closed at the second pressure and is closed or opened at the third pressure lower than the second pressure by a predetermined value. It is. Therefore, like the first pressure detection device for protecting the components of the conventional air conditioner, the second pressure detection device does not need to perform continuous pressure detection, and can be used with a changed detection value. It is not necessary to use a special pressure detecting device.
【００５７】また、冷媒の比較的高い温度を直接にもし
くは間接的に検出する冷媒温度検出器を備えている。冷
媒温度検出器は通常の温度センサとして使用されるサー
ミスタで一般的な部品で実現できる。Further, a refrigerant temperature detector for directly or indirectly detecting a relatively high temperature of the refrigerant is provided. The refrigerant temperature detector is a thermistor used as a normal temperature sensor and can be realized by general components.
【００５８】ここで、第２の圧力検出装置が第２の圧力
を検出して圧縮機の回転数を低減した後、冷媒温度検出
器の検出値が所定の冷媒温度となるべく圧縮機の回転数
を徐々に増減させる。Here, after the second pressure detecting device detects the second pressure and reduces the rotational speed of the compressor, the detected value of the refrigerant temperature detector is adjusted so that the detected value of the refrigerant temperature reaches a predetermined refrigerant temperature. Is gradually increased or decreased.
【００５９】よって、何かの要因もしくは、予め制御装
置に記憶されている回転数の低減量が適切でなく、低減
後の回転数が適切でない場合、冷媒温度検出器の検出値
が所定の冷媒温度となるべく圧縮機の回転数を徐々に増
減させることにより、回転数を適切に補正することがで
きる。Therefore, if for some reason or the amount of reduction in the number of revolutions stored in the control device in advance is not appropriate and the number of revolutions after the reduction is not appropriate, the value detected by the refrigerant temperature detector will be a predetermined value. By gradually increasing or decreasing the rotation speed of the compressor as much as possible to the temperature, the rotation speed can be appropriately corrected.
【００６０】請求項３の手段によれば、第２の圧力検出
装置は第２の圧力で開成もしくは閉成し、第２の圧力よ
り所定値低い第３の圧力で閉成もしくは開成する圧力ス
イッチである。これは、上記第２の手段と同様である。According to the third aspect of the present invention, the second pressure detecting device is opened or closed at the second pressure and is closed or opened at the third pressure lower than the second pressure by a predetermined value. It is. This is similar to the second means.
【００６１】ここで、第２の圧力検出装置が第２の圧力
を検出して圧縮機の回転数を低減した後、冷媒圧力は第
２の圧力よりも低いが第３の圧力より高い場合、第２の
圧力検出装置が第３の圧力で閉成もしくは開成するよう
に圧縮機の回転数を徐々に減少させる。よって、上記第
２の手段と同様何かの要因もしくは、予め制御装置に記
憶されている回転数の低減量が適切でなく、充分に圧力
が低下していない場合は、第２の圧力検出装置が第３の
圧力で閉成もしくは開成するように圧縮機の回転数を徐
々に減少させることにより、適切な圧力まで低下させる
ことができる。Here, after the second pressure detecting device detects the second pressure and reduces the rotational speed of the compressor, if the refrigerant pressure is lower than the second pressure but higher than the third pressure, The rotation speed of the compressor is gradually reduced so that the second pressure detecting device closes or opens at the third pressure. Therefore, if there is any factor similar to the above-mentioned second means or the amount of reduction in the number of revolutions previously stored in the control device is not appropriate and the pressure is not sufficiently reduced, the second pressure detecting device The pressure can be reduced to an appropriate pressure by gradually reducing the rotation speed of the compressor so that the compressor is closed or opened at the third pressure.
【００６２】請求項４の手段によれば、第１・２・３の
手段において、圧縮機の回転数が増加することにより冷
媒の圧力が上昇して、第２の圧力検出装置が第２の圧力
を検出して圧縮機の回転数を低減した場合、低減された
後の圧縮機の回転数を第１の回転数とし、第２の圧力検
出装置が第２の圧力を検出した際の室内送風量・吸込空
気温度を第１の室内送風量・第１の吸込空気温度とし
て、室内送風量もしくは吸込空気温度が、第１の室内送
風量より大きくもしくは第１の吸込空気温度より低くな
らない限り、圧縮機の回転数は第１の回転数を最大回転
数とする。According to the means of claim 4, in the first, second and third means, the pressure of the refrigerant increases due to the increase in the number of revolutions of the compressor, and the second pressure detecting device is connected to the second pressure detecting device. When the pressure is detected to reduce the number of rotations of the compressor, the reduced number of rotations of the compressor is set as the first number of rotations, and the room when the second pressure detection device detects the second pressure is used. Assuming that the blown air amount and the suction air temperature are the first indoor blow air amount and the first suction air temperature, unless the indoor blow air amount or the suction air temperature becomes larger than the first indoor blow air amount or lower than the first suction air temperature. The maximum number of rotations of the compressor is the first number of rotations.
【００６３】このため、以降圧縮機の回転数が変更され
ても、その最大回転数は第１の回転数であるので、室内
送風量・吸込空気温度が変わらなければ、冷媒の圧力が
上昇して、第２の圧力検出装置が第２の圧力を検出して
圧縮機の回転数を低減することは無い。よって、再三第
２の圧力検出装置が作動して、圧縮機の回転数が変動
し、吹出空気温度が変動して、もって乗員に違和感を与
えることを防止できる。また、圧縮機を含めて空調装置
の作動を安定させ、もって信頼性を向上できる。For this reason, even if the rotation speed of the compressor is changed thereafter, the maximum rotation speed is the first rotation speed. Therefore, if the amount of air blown into the room and the temperature of the intake air do not change, the pressure of the refrigerant increases. Therefore, the second pressure detecting device does not detect the second pressure and reduce the rotational speed of the compressor. Therefore, it is possible to prevent the second and second pressure detecting devices from being operated, the rotational speed of the compressor fluctuating, and the temperature of the blown air fluctuating, thereby giving the occupant an uncomfortable feeling. Further, the operation of the air conditioner including the compressor can be stabilized, thereby improving the reliability.
【００６４】請求項５の手段によれば、第１・２・３の
手段において、室内送風量が減少もしくは吸込空気温度
が上昇することにより冷媒の圧力が上昇して、第２の圧
力検出装置が第２の圧力を検出して圧縮機の回転数を低
減した場合、低減された後の圧縮機の回転数を第１の回
転数とし、低減される前の圧縮機の回転数を第２の回転
数とし、第２の圧力検出装置が第２の圧力を検出した際
の室内送風量・吸込空気温度を第１の室内送風量・第１
の吸込空気温度とし、室内送風量が減少もしくは吸込空
気温度が上昇する前の室内送風量・吸込空気温度を第２
の室内送風量・第２の吸込空気温度として、室内送風量
もしくは吸込空気温度が、第２の室内送風量もしくは第
２の吸込空気温度に復帰しても、圧縮機の回転数は第２
の回転数に復帰させない。According to the fifth aspect of the present invention, in the first, second and third aspects, the pressure of the refrigerant increases due to a decrease in the amount of air blown into the room or an increase in the temperature of the suction air, and the second pressure detecting device Detects the second pressure and reduces the rotational speed of the compressor, the reduced rotational speed of the compressor is defined as the first rotational speed, and the rotational speed of the compressor before the reduction is reduced to the second rotational speed. , And the indoor air flow rate / intake air temperature when the second pressure detecting device detects the second pressure is the first indoor air flow rate / first air flow rate.
The indoor air flow rate and the intake air temperature before the indoor air flow rate decreases or the suction air temperature rises
Even if the indoor air flow rate or the suction air temperature returns to the second indoor air flow rate or the second suction air temperature as the indoor air flow rate and the second suction air temperature, the rotational speed of the compressor remains at the second.
Do not return to the rotation speed of.
【００６５】これにより、室内送風量が減少もしくは導
入空気が車室内空気となって吸込空気温度が上昇したこ
とにより、一旦圧縮機の回転数を低減した場合、室内送
風量もしくは導入空気を元に戻しても、圧縮機の回転数
は元に戻らない。As a result, when the rotational speed of the compressor is once reduced due to a decrease in the amount of air blown into the room or an increase in the temperature of the intake air due to the intake air becoming the air in the vehicle, the amount of air blown into the room or the amount of the introduced air is reduced. When it is returned, the rotation speed of the compressor is not restored.
【００６６】よって、比較的乗員が操作することの多い
室内用送風装置６、導入空気切替装置２６を操作されて
も、一旦圧縮機の回転数を低減した以降は、再三第２の
圧力検出装置が作動することは無い。もって、圧縮機の
回転数が変動し、吹出空気温度が変動して、乗員に違和
感を与えることを防止できる。また、圧縮機を含めて空
調装置の作動を安定させ、もって信頼性を向上できる。Therefore, even if the indoor air blower 6 and the introduced air switching device 26 which are relatively frequently operated by the occupant are operated, once the rotational speed of the compressor is once reduced, the second pressure detecting device is repeated. Does not work. Accordingly, it is possible to prevent the rotational speed of the compressor from fluctuating and the temperature of the blown air from fluctuating, thereby giving the occupant a sense of discomfort. Further, the operation of the air conditioner including the compressor can be stabilized, thereby improving the reliability.
【図１】本発明の実施例に係る車両用ヒートポンプ式空
調装置の構成図FIG. 1 is a configuration diagram of a heat pump air conditioner for a vehicle according to an embodiment of the present invention.
【図２】（ａ）は車両用ヒートポンプ式空調装置の特性
図 （ｂ）は同特性図FIG. 2A is a characteristic diagram of a vehicle heat pump air conditioner, and FIG.
【図３】（ａ）は本発明の請求項１に係る車両用ヒート
ポンプ式空調装置の作動説明図 （ｂ）は同作動説明図FIG. 3 (a) is an operation explanatory view of the vehicle heat pump air conditioner according to claim 1 of the present invention, and FIG.
【図４】本発明の請求項２に係る車両用ヒートポンプ式
空調装置の作動説明図FIG. 4 is an explanatory view of the operation of the vehicle heat pump air conditioner according to claim 2 of the present invention.
【図５】本発明の請求項３・４に係る車両用ヒートポン
プ式空調装置の作動説明図FIG. 5 is an explanatory view of the operation of the vehicle heat pump air conditioner according to claims 3 and 4 of the present invention.
【図６】本発明の請求項５に係る車両用ヒートポンプ式
空調装置の作動説明図FIG. 6 is an explanatory view of the operation of the vehicle heat pump air conditioner according to claim 5 of the present invention.
【図７】従来の燃料エンジン駆動自動車用空調装置の構
成図FIG. 7 is a configuration diagram of a conventional fuel-engine-driven automotive air conditioner.
【図８】従来の車両用ヒートポンプ式空調装置の構成図FIG. 8 is a configuration diagram of a conventional heat pump air conditioner for a vehicle.
１ 圧縮機 ２ 室外熱交換器 ３ 室外熱交換器用送風装置 ４ 冷媒絞り装置 ５ 室内熱交換器 ６ 室内用送風装置 ７ 四方切替え弁 ８ 電動機 ９ 電動機駆動装置 １０ ベント吹出口 １１ ヒート吹出口 １２ デフロスト吹出口 １３ ベント・ヒート吹出口切替ダンパ １４ デフロスト吹出口ダンパ １５ ヒータコア １６ ミックスダンパ １７ 車室外空気導入口 １８ 車室内空気導入口 １９ 導入空気切替ダンパ ２０ 通風ダクト ２１ エンジン ２２ 暖冷房運転能力調節装置 ２３ 風量調節装置 ２４ 送風機駆動装置 ２５ 暖冷房運転切替装置 ２６ 導入空気切替装置 ２７ 高圧検出装置（第１の圧力検出装置） ２８ 吐出温検出装置（冷媒温度検出器） ２９ 保護装置 ３０ クラッチ ３１ 車室内温度検出器 ３２ 車室外温度検出器 ３３ 吸込空気温度検出器 ３４ 制御装置 ３５ 第２の圧力検出装置 DESCRIPTION OF SYMBOLS 1 Compressor 2 Outdoor heat exchanger 3 Blower for outdoor heat exchanger 4 Refrigerant throttling device 5 Indoor heat exchanger 6 Indoor blower 7 Four-way switching valve 8 Motor 9 Motor drive 10 Vent outlet 11 Heat outlet 12 Defrost blowing Outlet 13 Vent / heat outlet switching damper 14 Defrost outlet damper 15 Heater core 16 Mix damper 17 Outside air inlet 18 Inside air inlet 19 Inlet air switching damper 20 Ventilation duct 21 Engine 22 Heating / cooling operation capacity adjusting device 23 Air volume Control device 24 Blower drive device 25 Heating / cooling operation switching device 26 Introductory air switching device 27 High pressure detection device (first pressure detection device) 28 Discharge temperature detection device (refrigerant temperature detector) 29 Protection device 30 Clutch 31 Vehicle interior temperature detection Detector 32 Outside temperature detector 33 Suction air temperature detector 4 the control device 35 the second pressure detecting device
フロントページの続き (58)調査した分野(Int.Cl.6，ＤＢ名) F25B 1/00 B60H 1/32 F24F 11/02 102 Continuation of the front page (58) Field surveyed (Int.Cl. 6 , DB name) F25B 1/00 B60H 1/32 F24F 11/02 102
Claims (7)
検出装置を備え、前記第１の圧力検出装置が第１の圧力
を検出した場合、少なくとも圧縮機を停止させる構成と
した車両用ヒートポンプ式空調装置であって、 車室内に送風を行う室内用送風装置と、 第１の圧力よりも低い第２の圧力を検出する第２の圧力
検出装置と、 室内用熱交換器で加熱される空気温度を検出する吸込空
気温度検出装置と、 少なくとも前記圧縮機の回転数を制御する制御手段を備
え、 前記制御手段は第２の圧力検出装置が第２の圧力を検出
した場合、少なくとも前記室内用送風装置による室内送
風量、吸込空気温度に応じて前記圧縮機の回転数を低減
することを特徴とする車両用ヒートポンプ式空調装置。 1. A first pressure for detecting a first pressure of a refrigerant.
A first pressure detecting device, wherein the first pressure detecting device has a first pressure.
If at least, the compressor is stopped
Was a heat pump type air conditioner for a vehicle, a second pressure detecting the indoor blower for blowing air into the passenger compartment, a second pressure lower than the first pressure
Detector and suction air for detecting the temperature of the air heated by the indoor heat exchanger
An air temperature detection device, and control means for controlling at least the rotation speed of the compressor.
The control means detects that the second pressure detector detects the second pressure.
In this case, at least the indoor blower
Reduces the number of rotations of the compressor according to air volume and suction air temperature
A heat pump air conditioner for a vehicle.
検出装置を備え、前記第１の圧力検出装置が第１の圧力
を検出した場合、少なくとも圧縮機を停止させる構成と
した車両用ヒートポンプ式空調装置であって、 車室内に送風を行う室内用送風装置と、 第１の圧力よりも低い第２の圧力を検出する第２の圧力
検出装置と、 室内用熱交換器で加熱される空気温度を検出する吸込空
気温度検出装置と、 前記圧縮機の吐出側の冷媒の温度を検出する冷媒温度検
出器と、 少なくとも前記圧縮機の回転数を制御する制御手段を備
え、 前記制御手段は第２の圧力検出装置が第２の圧力を検出
した場合、少なくとも前記室内用送風装置による室内送
風量、吸込空気温度に応じて前記圧縮機の回転数を低減
し、 その後、前記冷媒温度検出器の検出値が所定の冷媒温度
となるよう前記圧縮機の回転数を制御することを特徴と
した車両用ヒートポンプ式空調装置。 2. A first pressure for detecting a first pressure of a refrigerant.
A first pressure detecting device, wherein the first pressure detecting device has a first pressure.
If at least, the compressor is stopped
Was a heat pump type air conditioner for a vehicle, a second pressure detecting the indoor blower for blowing air into the passenger compartment, a second pressure lower than the first pressure
Detector and suction air for detecting the temperature of the air heated by the indoor heat exchanger
An air temperature detection device, and a refrigerant temperature detector for detecting a temperature of a refrigerant on a discharge side of the compressor.
And a control means for controlling at least the rotation speed of the compressor.
The control means detects that the second pressure detector detects the second pressure.
In this case, at least the indoor blower
Reduces the number of rotations of the compressor according to air volume and suction air temperature
And, thereafter, the refrigerant temperature detection value is given of the refrigerant temperature detector
Controlling the number of revolutions of the compressor so that
Heat pump type air conditioner for vehicles.
検出装置を備え、前記第１の圧力検出装置が第１の圧力
を検出した場合、少なくとも圧縮機を停止させる構成と
した車両用ヒートポンプ式空調装置であって、 車室内に送風を行う室内用送風装置と、 第１の圧力よりも低い第２の圧力を検出する第２の圧力
検出装置と、 室内用熱交換器で加熱される空気温度を検出する吸込空
気温度検出装置と、 少なくとも前記圧縮機の回転数を制御する制御手段を備
え、 前記制御手段は第２の圧力検出装置が第２の圧力を検出
した場合、少なくとも前記室内用送風装置による室内送
風量、吸込空気温度に応じて前記圧縮機の回転数を低減
し、 その後、冷媒圧力が前記第２の圧力より低い第３の圧力
よりも高い場合、第３の圧力を基準に前記圧縮機の回転
数を制御することを特徴とした車両用ヒートポンプ式空
調装置。 3. A first pressure for detecting a first pressure of the refrigerant.
A first pressure detecting device, wherein the first pressure detecting device has a first pressure.
If at least, the compressor is stopped
Was a heat pump type air conditioner for a vehicle, a second pressure detecting the indoor blower for blowing air into the passenger compartment, a second pressure lower than the first pressure
Detector and suction air for detecting the temperature of the air heated by the indoor heat exchanger
An air temperature detection device, and control means for controlling at least the rotation speed of the compressor.
The control means detects that the second pressure detector detects the second pressure.
In this case, at least the indoor blower
Reduces the number of rotations of the compressor according to air volume and suction air temperature
And then a third pressure at which the refrigerant pressure is lower than the second pressure
Higher than the rotation of the compressor with respect to the third pressure.
Heat pump air for vehicles characterized by controlling the number
Control device.
量に比例し、吸込空気温度に反比例して前記圧縮機の回
転数を低減することを特徴とする請求項１乃至３のいず
れかに記載のヒートポンプ式空調装置。 4. The controller according to claim 1, wherein said control means is adapted to supply air to the room during a heating operation.
The amount of rotation of the compressor is proportional to the
4. The method according to claim 1, wherein the number of turns is reduced.
A heat pump air conditioner according to any of the claims.
若しくは車室外温度若しくは両者を混合した空気から吸
入空気温度を検出することを特徴とする請求項１乃至４
のいずれかに記載の車両用ヒートポンプ式空調装置。 5. The system according to claim 1, wherein said intake air temperature detecting device is a vehicle cabin temperature.
Or air from the outside air temperature or a mixture of both.
5. The method according to claim 1, wherein an input air temperature is detected.
The heat pump air conditioner for a vehicle according to any one of the above.
が第２の圧力を検出して圧縮機の回転数を低減した場
合、低減された後の圧縮機の回転数を第１の回転数と
し、第２の圧力検出装置が第２の圧力を検出した際の室
内送風量・吸込空気温度を第１の室内送風量・第１の吸
込空気温度として、室内送風量もしくは吸込空気温度
が、第１の室内送風量より大きくもしくは第１の吸込空
気温度より低くならない限り、圧縮機の回転数は第１の
回転数を最大回転数とすることを特徴とする請求項１乃
至５のいずれかに記載の車両用ヒートポンプ式空調装
置。 6. The pressure control device according to claim 6, wherein the control device is a second pressure detection device.
Detects the second pressure and reduces the number of rotations of the compressor.
In this case, the reduced rotation speed of the compressor is referred to as a first rotation speed.
And the chamber when the second pressure detecting device detects the second pressure.
The internal air flow and the intake air temperature are changed to the first indoor air flow and the first air intake.
As the intake air temperature, the indoor air flow or the intake air temperature
Is larger than the first indoor air flow or the first suction air
As long as the temperature is not lower than the air temperature, the rotation speed of the compressor
The rotation speed is set to a maximum rotation speed.
6. The heat pump air conditioner for a vehicle according to any one of 5 to 5.
Place.
２の圧力を検出して前記圧縮機の回転数を低減した場
合、低減された後の前記圧縮機の回転数を第１の回転数
とし、低減される前の前記圧縮機の回転数を第２の回転
数とし、第２の圧力検出装置が第２の圧力を検出した際
の室内送風量・吸込空気温度を第１の室内送風量・第１
の吸込空気温度とし、室内送風量が減少もしくは吸込空
気温度が上昇する前の室内送風量・吸込空気温度を第２
の室内送風量・第２の吸込空気温度として、室内送風量
もしくは吸込空気温度が、第２の室内送風量もしくは第
２の吸込空気温度に復帰しても、前記圧縮機の回転数は
第２の回転数に復帰しないこ とを特徴とする請求項１乃
至５のいずれかに記載の車両用ヒートポンプ式空調装
置。 7. The control device according to claim 1, wherein the second pressure detecting device is a second pressure detecting device.
2. If the pressure of (2) is detected and the rotational speed of the compressor is reduced,
If the number of rotations of the compressor after the reduction is
And the number of rotations of the compressor before being reduced to the second rotation
When the second pressure detection device detects the second pressure
Of the indoor air flow rate and the suction air temperature of the first indoor air flow rate
And the indoor air volume is reduced or the suction air
The indoor air flow and suction air temperature before the air temperature rises to the second
Indoor air flow rate and indoor air flow rate as the second suction air temperature
Or, if the intake air temperature is lower than the second indoor
Even when the suction air temperature returns to 2, the rotation speed of the compressor remains
Claim 1乃characterized that it will not return to the second rotational speed
6. The heat pump air conditioner for a vehicle according to any one of 5 to 5.
Place.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5053435A JP2990991B2 (en) | 1993-03-15 | 1993-03-15 | Heat pump type air conditioner for vehicles |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5053435A JP2990991B2 (en) | 1993-03-15 | 1993-03-15 | Heat pump type air conditioner for vehicles |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH06265225A JPH06265225A (en) | 1994-09-20 |
| JP2990991B2 true JP2990991B2 (en) | 1999-12-13 |
Family
ID=12942773
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5053435A Expired - Fee Related JP2990991B2 (en) | 1993-03-15 | 1993-03-15 | Heat pump type air conditioner for vehicles |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2990991B2 (en) |
-
1993
- 1993-03-15 JP JP5053435A patent/JP2990991B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH06265225A (en) | 1994-09-20 |
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