JP4710571B2 - Air conditioning apparatus - Google Patents

Air conditioning apparatus Download PDF

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JP4710571B2
JP4710571B2 JP2005345668A JP2005345668A JP4710571B2 JP 4710571 B2 JP4710571 B2 JP 4710571B2 JP 2005345668 A JP2005345668 A JP 2005345668A JP 2005345668 A JP2005345668 A JP 2005345668A JP 4710571 B2 JP4710571 B2 JP 4710571B2
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heat exchanger
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JP2007147220A (en
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貴之 井関
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パナソニック株式会社
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本発明は、空気調和装置の制御に関するものである。 The present invention relates to control of an air conditioner.

従来の空気調和機では、電源回路に瞬時停電を検知する検知回路を設け、瞬時停電が発生した場合空気調和装置の運転を停止し、一定時間停止後圧縮機を再起動するように制御されている(例えば、特許文献1参照)。 In the conventional air conditioner, a detection circuit for detecting an instantaneous power failure in the power supply circuit is provided to stop the operation when the air conditioning apparatus instantaneous power failure occurs, is controlled so as to restart the predetermined time after stopping the compressor are (e.g., see Patent Document 1).
特開平7−120045号公報 JP-7-120045 discloses

しかしながら、従来の空気調和装置では、10msec以上で電圧0%(100%電圧がドロップ)のような瞬時停電は検知できるが、10msec以下の短い瞬時停電や、電圧が100%ドロップせず50%程度のドロップの場合検知できず、このような瞬時停電が発生した場合、進相コンデンサを用いて駆動する単相一定速タイプ(誘導電動機モデル)の圧縮機を使用している場合、圧縮機のロータが逆回転して冷媒が循環しなくなることがある。 However, in the conventional air conditioner, the voltage from 0% in 10msec or more but (100% voltage drop) can detect the instantaneous power failure such as, 10msec or less short instantaneous power failure, about 50% without dropping the voltage to 100% not be detected when the drop, when such instantaneous power failure occurs, when using the compressor of the single-phase constant-speed type (induction motor model) for driving with a phase advancing capacitor, the compressor rotor there may be refrigerant reversely rotated is not circulated. ただし逆回転した場合でも圧縮機にはある程度の電流が流れるので、電子制御装置は通常運転か逆回転運転かを判別できない。 However, since the compressor even if the reverse rotation flows certain current, the electronic control device can not determine whether the normal operation or reverse rotation operation. よって、冷媒が循環しないので空気調和が行われない問題が発生する。 Therefore, the problem of air-conditioning is not performed because the refrigerant does not circulate occurs. かつ、逆回転時には圧縮機が異常振動するのでこの振動による配管折れが発生したり、圧縮機メカ部へのオイル供給がなくなることによる圧縮機の破壊や冷媒循環による圧縮機モータ部の冷却がなくなることによるモータ焼損が発生する。 And, since the time of the reverse rotation the compressor is abnormal vibration broken pipe may occur due to the vibration, the cooling of the compressor motor by disruption or refrigerant circulation compressor due to the oil supply to the compressor mechanism section is eliminated eliminated motor burnout occurs due to the fact.

本発明は、前記従来の課題を解決するもので、圧縮機が運転中にもかかわらず冷媒が循環していないことを速やかに判断して正常運転に戻すことにより、快適性が損なわれることを抑制することができるとともに、圧縮機の逆回転運転による圧縮機や配管の損傷を防止することができる空気調和機を提供することを目的とする。 The present invention is intended to solve the conventional problems, by returning to normal operation and rapidly determine that the refrigerant compressor despite during operation does not circulate, that comfort is impaired it is possible to suppress an object to provide an air conditioner capable of preventing damage to the compressor and pipes according to the reverse rotation operation of the compressor.

前記従来の課題を解決するために、本発明の空気調和装置は、 一定速の圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置を有する室外機と、室内熱交換器、室内送風機を有する室内機と、室外機に室外空気温度検出装置と室外熱交換器温度検出装置と、圧縮機の運転電流値を検知する圧縮機運転電流検知装置と、圧縮機の運転時の最低運転電流値および最高運転電流値を記憶する圧縮機運転電流設定記憶装置と 、室内機に室内吸込み空気温度検出装置と室内熱交換器温度検出装置とを設け、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、 圧縮機運転電流検知装置で検知する値が圧縮機運転電流設定記憶装置に記憶されている最低運転電流値と最高運転電流値の範囲内で圧縮機が運転中である場合に In order to solve the above conventional problems, the air conditioning apparatus of the present invention, a constant-speed compressor, an outdoor heat exchanger, an outdoor fan, 4-way valve, an outdoor unit having a throttle device, the indoor heat exchanger, an indoor and an indoor unit having an air blower, an outdoor air temperature detecting device to the outdoor unit and the outdoor heat exchanger temperature detector, and the compressor operation current detection device for detecting the operating current of the compressor, the minimum operation time of the operation of the compressor a current value and the maximum operating current for storing compressor operating current setting storage device, and an indoor suction air temperature detector and the indoor heat exchanger temperature detection device provided in the indoor unit, at least cooling operation or dehumidifying operation or heating operation in the air conditioning apparatus performs, when the compressor within the range of minimum operating current and maximum operating current value the value detected by the compressor operation current detection apparatus is being stored in the compressor operation current setting storage device is in operation to, 房もしくは除湿運転中であれば、室外空気温度と室外熱交換器温度との差が所定温度以下の状態を所定時間継続した場合に、または、暖房運転中であれば、室内吸込み空気温度と室内熱交換器温度との差が所定温度以下の状態を所定時間継続した場合に、圧縮機の運転を停止し、所定時間停止後再起動する制御装置を設けたもので、圧縮機の運転中に、室内側の吸込み空気温度や室内熱交換器温度、室外側の空気温度や室外熱交換器温度から冷媒の循環の有無を判断するとともに、圧縮機を一旦停止し、再起動することにより、圧縮機が逆回転し続けることを防止する。 If tuft or during dehumidification operation, if the difference between the outdoor air temperature and outdoor heat exchanger temperature continues for a predetermined time the following state for a predetermined temperature, or, if during the heating operation, the indoor suction air temperature and the indoor If the difference between the heat exchanger temperature continues for a predetermined time the following state for a predetermined temperature, stopping the operation of the compressor, which was provided with a control device to restart after a predetermined time is stopped, during operation of the compressor , indoor suction air temperature and the indoor heat exchanger temperature, as well as determining the presence or absence of the outdoor side of the circulation from the air temperature and the outdoor heat exchanger temperature of the refrigerant, the compressor is temporarily stopped, by restarting the compression to prevent the machine continues to reverse rotation.

本発明の空気調和装置は、圧縮機が運転中にもかかわらず冷媒が循環していないことを速やかに判断して正常運転に戻すことにより、快適性が損なわれることを抑制することができるとともに、圧縮機の逆回転運転による圧縮機や配管の損傷を防止して信頼性を向上することができる。 The air conditioner of the present invention, by returning to normal operation and rapidly determine that the refrigerant compressor despite during operation is not circulated, it is possible to prevent the comfort is impaired , damage to the compressor and pipes according to the reverse rotation operation of the compressor to prevent it is possible to improve the reliability.

第1の発明は、一定速の圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置を有する室外機と、室内熱交換器、室内送風機を有する室内機と、室外機に室外空気温度検出装置と室外熱交換器温度検出装置と、圧縮機の運転電流値を検知する圧縮機運転電流検知装置と、圧縮機の運転時の最低運転電流値および最高運転電流値を記憶する圧縮機運転電流 A first aspect of the present invention is a constant-speed compressor, an outdoor heat exchanger, an outdoor fan, 4-way valve, an outdoor unit having a throttle device, the indoor heat exchanger, and an indoor unit having an indoor fan, the outdoor air to the outdoor unit compressor for storing a temperature detecting device and the outdoor heat exchanger temperature detector, and the compressor operation current detection device for detecting the operating current of the compressor, the compressor minimum operating current value and the maximum operating current during operation operating current
設定記憶装置と、室内機に室内吸込み空気温度検出装置と室内熱交換器温度検出装置とを設け、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、圧縮機運転電流検知装置で検知する値が圧縮機運転電流設定記憶装置に記憶されている最低運転電流値と最高運転電流値の範囲内で圧縮機が運転中である場合に、冷房もしくは除湿運転中であれば、室外空気温度と室外熱交換器温度との差が所定温度以下の状態を所定時間継続した場合に、または、暖房運転中であれば、室内吸込み空気温度と室内熱交換器温度との差が所定温度以下の状態を所定時間継続した場合に、圧縮機の運転を停止し、所定時間停止後再起動する制御装置を設けたもので、圧縮機の運転中に、冷房あるいは除湿運転中は室外側の空気温度と A setting storage unit, and an indoor suction air temperature detector and the indoor heat exchanger temperature detector provided in the indoor unit, the air conditioning apparatus performing at least cooling operation or dehumidifying operation or heating operation, detected by the compressor operation current detection device when the value of is in the compressor operating within the minimum operating current and maximum operating current value stored in the compressor operation current setting storage device, if during the cooling or dehumidifying operation, the outdoor air temperature and when the difference between the outdoor heat exchanger temperature continues for a predetermined time the following state for a predetermined temperature, or, if during the heating operation, the difference between the indoor intake air temperature and the indoor heat exchanger temperature is less than a predetermined temperature when continuing the state for a predetermined time, stops the operation of the compressor, which was provided with a control device to restart after a predetermined time is stopped, during operation of the compressor, cooling or during dehumidifying operation, the outdoor side air temperature When 外熱交換器温度との差から、暖房運転中は室内側の吸込み空気温度と室内熱交換器温度との差から、冷媒の循環の有無を判断して、電気回路が検知できない瞬時停電による圧縮機逆回転により冷媒非循環状態になることによる空気調和装置の快適性の低下(冷えないや温まらないといった不具合)が回避できるとともに、圧縮機逆回転による圧縮機や配管の破損を防止でき、空気調和装置の快適性と信頼性が向上する。 From the difference between the external heat exchanger temperature, during the heating operation from the difference between the indoor side of the suction air temperature and the indoor heat exchanger temperature, and determines the presence or absence of circulation of the refrigerant, compressed by a momentary power failure of the electrical circuit can not be detected reduction in comfort of the air conditioner of becoming a refrigerant acyclic state by machine reverse rotates with (cold not Ya inconvenience not warm) can be avoided, it is possible to prevent damage to the compressor and pipes according to the compressor reverse rotation, air comfort and reliability of the conditioning apparatus is improved.

第2の発明は、 第1の発明において、圧縮機の起動から所定時間だけ各温度検出装置の非検知時間を設けたものである。 The second invention is the first invention, a predetermined time from the start of the compressor is provided with a non-detection time of each temperature sensing device. 圧縮機起動から冷媒が循環し熱交換器温度が上昇したり下降したりするのに時間がかかる。 Time to the refrigerant from the compressor start circulating heat exchanger temperature or lowered or raised consuming. 特に長時間停止時は冷媒が圧縮機内部に寝込み状態にあるので冷媒が循環するに要する時間がかかる。 Take time required for the refrigerant circulates especially since long quiescent period is in the state stagnation inside the refrigerant compressor. この間を非検知にしないと、圧縮機逆転による冷媒非循環と判別できずに誤って起動後即停止する可能性が有り、上記構成により、この誤動作を防止できる。 Otherwise between this non-detection, the possibility of sudden stop after starting accidentally not possible to determine the refrigerant non-circulation by the compressor reversed there, the above-described configuration can prevent this erroneous operation.

以下、本発明の実施の形態について、図面を参照しながら説明する。 Hereinafter, embodiments of the present invention will be described with reference to the drawings. なお、本実施の形態によって本発明が限定されるものではない。 It should be understood that the present invention is not limited by this embodiment.

(実施の形態1) (Embodiment 1)
図1は、本発明の実施の形態1における空気調和装置の冷凍サイクル図であり、図2は制御ブロック図、図3はフローチャート図である。 Figure 1 is a refrigeration cycle diagram of the air conditioning unit of the first exemplary embodiment of the present invention, FIG 2 is a control block diagram, FIG. 3 is a flow chart. 図1において、室外機1には圧縮機2と、室外熱交換器3と、室外送風機4と、冷媒液管5aと、冷媒ガス管6aと、冷暖房切換用の四方弁7と、絞り装置8が設けられている。 In Figure 1, a compressor 2 to the outdoor unit 1, an outdoor heat exchanger 3, an outdoor blower 4, and the refrigerant liquid pipe 5a, and the refrigerant gas pipe 6a, the four-way valve 7 for heating and cooling switching, the iris 8 It is provided. また、室外機1には室外熱交換器3の温度を検出する室外熱交換器温度検知装置9と室外気温度を検出する室外空気温度検知装置10が設けられている。 The outdoor air temperature detecting device 10 for detecting the outdoor heat exchanger temperature detector 9 and the outdoor air temperature detected temperature of the outdoor heat exchanger 3 is provided in the outdoor unit 1. 一方、室内機11には室内送風機12と、室内熱交換器13と、室内熱交換器13の温度を検出する室内熱交換器温度検知装置14と、部屋の室温を検出する室内吸込み温度検知装置15と、居住者が希望する運転モード(冷房、除湿または暖房)、室温、運転あるいは停止、風量及び風向などを設定できる運転設定装置16が設けられている。 On the other hand, the indoor unit 11 and the indoor blower 12, an indoor heat exchanger 13, an indoor heat exchanger temperature detector 14 for detecting the temperature of the indoor heat exchanger 13, the indoor suction temperature detecting device for detecting the room temperature of the room 15, operation mode resident desires (cooling, dehumidifying or heating), room temperature, operation or stop, the operation setting device 16 can be set such air volume and wind direction are provided. そして、室外機1と室内機11とは接続配管5b,6bで接続されて、冷凍サイクルが構成されている。 And, the outdoor unit 1 and the indoor units 11 are connected by a connecting pipe 5b, 6b, the refrigeration cycle is constituted.

上記冷凍サイクルにおいて、冷房あるいは除湿運転時、圧縮機2から吐出された冷媒は四方弁7を介して室外熱交換器3へと流れ、室外送風機4により室外熱交換器3で室外空気と熱交換して凝縮液化し、次に冷媒液管5aを通って絞り装置8を通過することにより減圧された冷媒は室内熱交換器13で蒸発した後に、冷媒ガス管6aを通り四方弁7を介して再び圧縮機2に吸入される。 In the refrigeration cycle, cooling or dehumidification operation, refrigerant discharged from the compressor 2 flows into the outdoor heat exchanger 3 through the four-way valve 7, the outdoor air heat exchange in the outdoor heat exchanger 3 by the outdoor blower 4 condensed and liquefied by, the refrigerant decompressed by passing through the throttle device 8 then passes through the refrigerant liquid pipe 5a after having evaporated in the indoor heat exchanger 13, via the street four-way valve 7 and the refrigerant gas pipe 6a It sucked into the compressor 2 again. 暖房運転時は圧縮機2から吐出された冷媒は四方弁7を介して室内熱交換器13へと流れ、室内送風機12により室内熱交換器13で室内空気と熱交換して凝縮液化し、次に絞り装置8を通過することにより減圧された冷媒は室外熱交換器3で蒸発した後に、四方弁7を介して再び圧縮機2に吸入される。 Refrigerant during the heating operation is discharged from the compressor 2 flows into the indoor heat exchanger 13 via the four-way valve 7, by the indoor heat exchanger 13 and indoor air heat exchanger and condensed by the indoor fan 12, the following refrigerant decompressed by passing through the throttle device 8 to the after having evaporated in the outdoor heat exchanger 3 and is sucked into the compressor 2 again through the four-way valve 7.

次に、本発明の制御について図2,3を用いて説明する。 Next, the control of the present invention will be described with reference to FIGS. 図2において、本発明の空気調和装置の制御装置17には、居住者が希望する運転モード切替スイッチ18(冷房、除湿または暖房)と室内温度設定スイッチ19と運転停止スイッチ20と風量設定スイッチ21と風向設定スイッチ22で構成されている運転設定装置16の信号を記憶する運転モード記憶装置23と、室内熱交換器温度検知装置14と室内吸込み温度検知装置15と、室外熱交換器検知装置9と、室外気温度検知装置10と、圧縮機2の運転電流を検知する圧縮機運転電流検知装置24と、圧縮機2の運転電流設定値を記憶する圧縮機運転電流設定記憶装置25(ここには低外気温度時の最低電流設定値と過負荷運転時の最高電流設定値が記憶されている)と、室内熱交換器温度検知装置14と室内吸込み温度検知装置15 In Figure 2, the control unit 17 of the air conditioning apparatus of the present invention, the operation mode changeover switch 18 (cooling, dehumidifying or heating) the resident desires and room temperature setting switch 19 and the operation stop switch 20 air volume setting switch 21 and the operation mode storage unit 23 for storing a signal of operation setting unit 16 is configured with air direction setting switch 22, an indoor heat exchanger temperature detector 14 and indoor suction temperature detecting device 15, an outdoor heat exchanger detecting device 9 When, an outdoor air temperature detecting device 10, the compressor operation current detection device 24 for detecting the operating current of the compressor 2, the compressor 2 operating current setting compressor operation current setting storage unit stores the value 25 (here the low outside air minimum current set value of the time temperature and maximum current setting value at the time of overload operation is stored), the indoor heat exchanger temperature detector 14 and indoor suction temperature detecting device 15 ら検出される温度との差温設定値を記憶する室内差温設定記憶装置26と、室外熱交換器温度検知装置9と室外気温度検知装置10から検出される温度との差温設定値を記憶する室外差温設定記憶装置27と、以上の信号を定期的に検出するためのサンプリング時間を設定する運転時間設定記憶装置28aと差温設定の継続時間を記憶する運転時間設定記憶装置28bと、以上の信号をサンプリング時間毎に受けて圧縮機2、室内送風機12、室外送風機4等の運転を決定する判定装置29と、判定装置29の信号により、圧縮機2や室内送風機12、室外送風機4等を駆動する出力リレー回路30を有している。 An indoor difference temperature setting storage unit 26 for storing the differential temperature set value of the temperature to be al detected, the differential temperature set value of the temperature detected from the outdoor heat exchanger temperature detector 9 and the outdoor air temperature detecting device 10 an outdoor difference temperature setting memory unit 27 for storing the operation time setting storage unit 28b for storing the duration of periodically set the sampling time for detecting operation time setting storage unit 28a and the differential temperature set a more signals 2, the compressor receives the above signal for each sampling time, the indoor blower 12, a determination unit 29 for determining the operation of such outdoor blower 4, the signal determination unit 29, the compressor 2 and the indoor fan 12, outdoor blower 4 or the like has an output relay circuit 30 for driving.

居住者が運転モード切替スイッチ18で冷房、除湿または暖房を選択し運転を開始すると、運転モード記憶装置23、室内吸い込み温度検知装置15、室内温度設定装置19の信号により出力リレー回路30が圧縮機2を駆動するが、図3において、居住者が運転モード切替スイッチ18で冷房、除湿を選択した場合には(S2のY)、圧縮機2がサーモON判定で連続運転中に(S4のY)、圧縮機運転電流検知装置24の検出値Icp(S5)が圧縮機運転電流設定記憶装置25に設定されている値の範囲内(例えば1.5A≦Icp≦30A)にあると(S6のY)、室外熱交換器温度検知装置9(Tc)と室外空気温度検知装置10(Tgs)との検出値からそれらの温度差△Tを算出し(S7)、温度差△Tが室外差温設定記憶装 Cooling resident in the operating mode selector switch 18, when starting the selected operating dehumidification or heating, the operation mode storage unit 23, the indoor suction temperature detecting device 15, the output relay circuit 30 a signal of the room temperature setting device 19 is compressor driving the 2, but in FIG. 3, the cooling resident in the operating mode selector switch 18, if you select the dehumidification (the S2 Y), the compressor 2 during continuous operation thermo oN determination (S4 of Y ), when the detection value Icp of compressor operation current detection device 24 (S5) is within the range of values ​​set for the compressor operation current setting storage device 25 (e.g., 1.5A ≦ Icp ≦ 30A) (S6 of Y), the calculated their temperature difference △ T from the detection value of the outdoor heat exchanger temperature detector 9 and (Tc) and the outdoor air temperature detecting device 10 (Tgs) (S7), the temperature difference △ T is the outdoor difference temperature setting storage instrumentation 27の設定値(例えば3℃)以下かどうか判定し(S8)、その状態が運転時間設定記憶装置28bの設定値(例えば3分)以上継続すると(S9のY)、圧縮機2を所定時間(例えば3分)停止し(S10)、時間経過後再起動する(S11)。 27 settings (for example, 3 ° C.) if it is determined whether the following (S8), is continued its state set value of the operation time setting storage device 28b (e.g. three minutes) or more (S9 of Y), the compressor 2 predetermined time (e.g., 3 minutes) stop (S10), restarts after the time (S11).

居住者が運転モード切替スイッチ18で暖房を選択した場合には(S2のN)、圧縮機2がサーモON判定で連続運転中に(S13のY)に、圧縮機運転電流検知装置24の検出値Icp(S14)が圧縮機運転電流設定記憶装置25に設定されている値の範囲内(例えば1.5A≦Icp≦30A)にあると(S15のY)、室内熱交換器温度検知装置14(Te)と室内吸込み空気温度検知装置15(Tns)との検出値からそれらの温度差△Tを算出し(S16)、温度差△Tが室内差温設定記憶装置26の設定値(例えば3℃)以下かどうか判定し(S17)、その状態が運転時間設定記憶装置28bの設定値(例えば3分)以上継続すると(S18のY)、圧縮機2を所定時間(例えば3分)停止し(S19)、時間経過後再起動 If the resident has selected the heating in operation mode changeover switch 18 (S2 of N), while the compressor 2 is operated continuously in the thermo ON determination (S13 of Y), the detection of compressor operation current detection device 24 to be in the value Icp (S14) is within the range of values ​​set in the compressor operation current setting storage device 25 (e.g., 1.5A ≦ Icp ≦ 30A) (S15 of Y), the indoor heat exchanger temperature detector 14 (Te) and calculates their temperature difference △ T from the detected value of the indoor suction air temperature detector 15 (Tns) (S16), the temperature difference △ T is set value of the room differential temperature setting storage device 26 (e.g., 3 ° C.) if it is determined whether the following (S17), is continued its state set value of the operation time setting storage device 28b (e.g. three minutes) or more (S18 of Y), the compressor 2 a predetermined time (e.g., 3 min) stop (S19), restart after a lapse of time る(S20)。 That (S20).

冷房運転時は室外側は凝縮側(放熱側)であるので室外気温度(例えば35℃)に対し、室外熱交換器の温度は通常運転中は高い(例えば50℃)はずであるが、冷房運転中(サーモON中)で圧縮機に通常の運転電流が流れているのにもかかわらず、室外空気温と室外熱交換器温度との温度差がほとんどない(例えば3℃)状態がしばらく継続(例えば3分)するのは冷媒が循環していないと判断し(冷媒が循環せずに、ただの送風状態なので室内吸い込み温度と室内熱交換器温度が数分で同一温度になる)、特にそのような状態で他の保護装置が作動しない場合は、圧縮機が瞬時停電等により逆転運転している可能性が高いと考えられるので、圧縮機を停止し、3分後再起動するように制御している。 Cooling operation whereas since the outdoor side is the condensation side (radiator side) outdoor air temperature (e.g. 35 ° C.), although the temperature of the outdoor heat exchanger should high (e.g. 50 ° C.) during normal operation, cooling Despite the normal operating current to the compressor in operation (in thermo oN) is flowing, there is little temperature difference between the outdoor air temperature and outdoor heat exchanger temperature (e.g. 3 ° C.) state continues for some time (e.g., 3 minutes) it is given is determined that refrigerant has not circulated (without refrigerant circulates, so just a blowing state becomes the same temperature indoors suction temperature and the indoor heat exchanger temperature a few minutes), in particular If other protective device does not work in such a state, since the compressor is considered likely to be reverse rotation by a momentary power failure or the like, a compressor is stopped, to restart after 3 minutes and it is controlled.

同様に暖房運転時は、室内側が凝縮側(放熱側)であるので室内吸込み温度(例えば20℃)に対し、室内熱交換器の温度は通常運転中は高い(例えば40℃)はずであるが、暖房運転中(サーモON中)で圧縮機に通常の運転電流が流れているのにもかかわらず、室内吸い込み空気温度と室内熱交換器温度の温度差がほとんどない(例えば3℃)状態がしばらく継続(例えば3分)するのは冷媒が循環していないと判断し(冷媒が循環せずに、ただの送風状態なので室外気温度と室外熱交換器温度が数分で同一温度になる)、同様に圧縮機が瞬時停電等により逆転運転している可能性が高いので、圧縮機を停止し、3分後再起動するように制御している。 Similarly the heating operation, compared since the indoor side is the condensation side (radiator side) indoor suction temperature (e.g. 20 ° C.), the temperature of the indoor heat exchanger should during normal operation is higher (for example, 40 ° C.) , despite the normal operating current to the compressor in heating operation (during the thermo oN) is flowing, the temperature difference between the indoor intake air temperature and the indoor heat exchanger temperature has little (e.g. 3 ° C.) state determined not to be the refrigerant circulates to continues for some time (e.g. 3 minutes) (without refrigerant circulating the outdoor air temperature and outdoor heat exchanger temperature is the same temperature in a few minutes so just blowing state) since Similarly compressor are likely to be reverse rotation by a momentary power failure or the like, a compressor is stopped, and controls to restart after 3 minutes.

冷房時の室内側、暖房時の室外側は共に蒸発側で、蒸発側でも判断できるが(例えば冷房時、室内吸込み温度に対し、熱交換器の温度は10℃〜15℃程低いのでこの温度差を検知し、温度差がなくなれば停止する制御も有効)、蒸発側は熱交換器に水滴が付着し、冷媒の循環がなくなって送風状態になっても水滴が蒸発するまでに時間がかかり、例えば冷房時の室内吸込み空気温度と室内熱交換器温度が同一温度になかなかならない(凝縮側は1分ほどでほぼ同一になるが、蒸発側は10分ほどかかる場合がある)。 Interior side of the cooling, the outdoor side both the evaporation side of the heating, can be determined at the evaporation side (e.g. during the cooling, to room suction temperature, this temperature the temperature of the heat exchanger is low enough 10 ° C. to 15 ° C. detecting the difference, control also effective to stop if there is no temperature difference), the evaporation side water droplets adhere to the heat exchanger, it takes time until water droplets become blowing state gone circulation of refrigerant evaporates , for example room return air temperature and the indoor heat exchanger temperature is not quite the same temperature during cooling (condensation side is made substantially the same in about 1 minute, the evaporation side it may take up to 10 minutes). 検知温度差を大きくとると誤作動の可能性が高くなるし(正常運転との差が判断しづらくなる)、温度差が小さいままの場合は検知まで時間がかかり(10分ほど)、この間一時的に冷えなくなるので快適性が著しく低下すると共に、圧縮機逆転による圧縮機異常振動による配管折れや、圧縮機メカ部へのオイル供給がなくなることによる圧縮機の破壊や冷媒循環による圧縮機モータ部の冷却なくなることによるモータ焼損が発生する可能性が高くなる。 Sensing to the possibility of malfunction and the temperature difference increases take increases (becomes difficult to determine the difference between normal operation), in the case of still temperature difference is small it takes time until the detection (about 10 minutes), during which one o'clock manner with comfort because not cool significantly decreases, broken or pipe by the compressor abnormal vibration due to compressor reverses, the compressor motor by disruption or refrigerant circulation compressor due to the oil supply to the compressor mechanism section is eliminated motor burnout becomes likely to occur due to cooling eliminates the. よって、凝縮側で判断するのが最も適している。 Therefore, the most suitable is to determine in the condenser side.

そしてこの構成によれば、電気回路が検知できない瞬時停電による圧縮機逆転により冷媒非循環状態になることによる空気調和装置の快適性の低下(冷えないや温まらないといった不具合)が回避できるとともに、圧縮機逆転による圧縮機や配管の破損を防止することができ、空気調和装置の快適性と信頼性が向上する。 And according to this configuration, the decrease in the comfort of the air conditioner of becoming a refrigerant acyclic state by the compressor reverses by a momentary power failure of the electrical circuit can not be detected (cold not Ya inconvenience not warm) can be avoided, compression it is possible to prevent damage of the compressor and piping by the machine reverses, thus improving comfort and reliability of the air conditioner.

参考例1 (Reference Example 1)
参考例1にかかる空気調和装置の冷凍サイクル図は実施の形態1に対し、室外空気温検出装置10がないだけなので説明は省略する。 A refrigeration cycle diagram of an air conditioner according to the present embodiment 1 with respect to the first embodiment, description since only there is no outdoor air temperature detecting device 10 is omitted. 図4は制御ブロック図、図5はフローチャートである。 Figure 4 is a control block diagram, FIG. 5 is a flow chart. 実施の形態1で説明した様に冷房運転時の室内側(蒸発側)での冷媒不循環の判断が難しいが、本発明のように、室外空気温検出装置10がない場合、冷房運転時の室外側(凝縮側)で判断が不可能になる。 It is difficult determination of the refrigerant non circulation of the indoor side of the cooling operation as described in the first embodiment (evaporation side), as in the present invention, if there is no outdoor air temperature detecting device 10, during the cooling operation judgment in the outdoor side (condensation side) becomes impossible. これを解決するのが本発明である。 It is the present invention to solve this.

本発明の制御について図4,5を用いて説明する。 The control of the present invention will be described with reference to FIGS. 図4において、本発明の空気調和装置の制御装置17には、居住者が希望する運転モード切替スイッチ18(冷房、除湿または暖房)と室内温度設定スイッチ19と運転停止スイッチ20と風量設定スイッチ21と風向設定スイッチ22で構成されている運転設定装置16の信号を記憶する運転モード記憶装置23と、室内熱交換器温度検知装置14と室内吸込み温度検知装置15と、室外熱交換器検知装置9と、圧縮機2の運転電流を検知する圧縮機運転電流検知装置24と、圧縮機2の運転電流設定値を記憶する圧縮機運転電流設定記憶装置25(ここには低外気温度時の最低電流設定値と過負荷運転時の最高電流設定値が記憶されている)と、室内熱交換器温度検知装置14と室外熱交換器温度検知装置9から検出される温度との差温 4, the control unit 17 of the air conditioning apparatus of the present invention, the operation mode changeover switch 18 (cooling, dehumidifying or heating) the resident and desired room temperature setting switch 19 and the operation stop switch 20 and the air volume setting switch 21 and the operation mode storage unit 23 for storing a signal of operation setting unit 16 is configured with air direction setting switch 22, an indoor heat exchanger temperature detector 14 and indoor suction temperature detecting device 15, an outdoor heat exchanger detecting device 9 When a compressor operation current detection device 24 for detecting the operating current of the compressor 2, the compressor 2 operating current setpoint compressor operation current setting storage unit stores the 25 (here minimum current at low outside air temperature differential temperature set value and an overload maximum current setting value at the time of operation is stored), and the temperature detected by the indoor heat exchanger temperature detector 14 and the outdoor heat exchanger temperature detector 9 定値を記憶する差温設定記憶装置31と、以上の信号を定期的に検出するためのサンプリング時間を設定する運転時間設定記憶装置28aと差温設定の継続時間を記憶する運転時間設定記憶装置28bと、以上の信号をサンプリング時間毎に受けて圧縮機2、室内送風機12、室外送風機4等の運転を決定する判定装置29と、判定装置29の信号により、圧縮機2や室内送風機12、室外送風機4等を駆動する出力リレー回路30を有している。 Operation time setting storage unit 28b for storing a differential temperature setting storage unit 31 for storing a value, the duration of the above signals periodically set the sampling time for detecting operation time setting storage unit 28a and the differential temperature set When the compressor 2 receives the above signal for each sampling time, the indoor blower 12, a determination unit 29 for determining the operation of such outdoor blower 4, the signal determination unit 29, the compressor 2 and the indoor fan 12, the outdoor and an output relay circuit 30 for driving the blower 4 and the like.

居住者が運転モード切替スイッチ18で冷房、除湿または暖房を選択し運転を開始すると、運転モード記憶装置23、室内吸い込み温度検知装置15、室内温度設定装置19の信号により出力リレー回路30が圧縮機2を駆動するが、図5において、居住者が運転モード切替スイッチ18で冷房、除湿を選択した場合には(S22のY)、圧縮機2がサーモON判定で連続運転中に(S24のY)に、圧縮機運転電流検知装置24の検出値Ic Cooling resident in the operating mode selector switch 18, when starting the selected operating dehumidification or heating, the operation mode storage unit 23, the indoor suction temperature detecting device 15, the output relay circuit 30 a signal of the room temperature setting device 19 is compressor driving the 2, but in FIG. 5, the cooling resident in the operating mode selector switch 18, if you select the dehumidification (the S22 Y), the compressor 2 during continuous operation thermo oN determination (S24 Y a), the detection value Ic of compressor operation current detection device 24
p(S25)が圧縮機運転電流設定記憶装置25に設定されている値の範囲内(例えば1.5A≦Icp≦30A)にあると(S26のY)、室内熱交換器温度検知装置14(Tc)と室外熱交換器温度検知装置9(Te)との検出値からそれらの温度差△Tを算出し(S27)、温度差△Tが差温設定記憶装置31の設定値(例えば7℃)以下かどうかを判定し(S28)、その状態が運転時間設定記憶装置28bの設定値(例えば3分)以上継続すると(S29のY)、圧縮機2を所定時間(例えば3分)停止し(S30)、時間経過後再起動する(S31)。 p (S25) When in the range of values ​​set for the compressor operation current setting storage device 25 (e.g., 1.5A ≦ Icp ≦ 30A) (S26 of Y), the indoor heat exchanger temperature detector 14 ( from the detected value of tc) and the outdoor heat exchanger temperature detector 9 and (Te) calculated and their temperature difference △ T (S27), the temperature difference △ T is the differential temperature setting storage device 31 of the set value (e.g., 7 ° C. ) hereinafter whether judged (S28), it is continued its state operation time setting memory 28b of the setting value (e.g., 3 minutes) or more (S29 of Y), the compressor 2 a predetermined time (e.g., 3 min) stop (S30), restarts after the time (S31).

そしてこの構成によれば、室外空気温検知装置がなくても冷房時の冷媒非循環が検知可能になるので、室外空気温度センサーが不要になり、コストダウンが図れる。 And according to this configuration, since the refrigerant non-circulation of the cooling without the outdoor air temperature detecting device is detectable, the outdoor air temperature sensor is not required, cost can be reduced. よって、シンプルでかつ低コストな空気調和装置が提供でき、電気回路が検知できない瞬時停電による圧縮機逆転により冷媒非循環状態になることによる空気調和装置の快適性の低下(冷えないや温まらないといった不具合)が回避できるとともに、圧縮機逆転による圧縮機や配管の破損を防止することができ、空気調和装置の快適性と信頼性が向上する。 Therefore, it provides simple and low-cost air conditioner is an electric circuit is said that lowering of comfort (no cold Ya warm without the air conditioning apparatus according to become refrigerant acyclic state by the compressor reverses by momentary power failure can not be detected with defect) can be avoided, it is possible to prevent damage to the compressor and pipes according to the compressor reverses, thereby improving the comfort and reliability of the air conditioner.

参考例2 (Reference Example 2)
参考例2にかかる空気調和機の冷凍サイクル図は実施の形態1に対し、室外気温検出装置10がないだけなので説明は省略する。 A refrigeration cycle diagram of an air conditioner according to the reference example 2 to Embodiment 1, therefore description only no outdoor air temperature detecting device 10 is omitted. 図6は制御ブロック図、図7はフローチャートである。 Figure 6 is a control block diagram, FIG. 7 is a flow chart. 実施の形態1で説明した様に冷房運転時の室内側(蒸発側)での冷媒不循環の判断が難しいが、本発明のように、室外空気温検出装置10がない場合、これを解決するのが本発明である。 It is difficult determination of the refrigerant non circulation of the indoor side of the cooling operation as described in the first embodiment (evaporation side), as in the present invention, if there is no outdoor air temperature detecting device 10, the solution to this the is the present invention.

本参考例の制御について図6,7を用いて説明する。 The control of the reference example will be described with reference to FIGS. 図6において、 本参考例の空気調和装置の制御装置17には、居住者が希望する運転モード切替スイッチ18(冷房、除湿または暖房)と室内温度設定スイッチ19と運転停止スイッチ20と風量設定スイッチ21と風向設定スイッチ22で構成されている運転設定装置16の信号を記憶する運転モード記憶装置23と、室内熱交換器温度検知装置14と室内吸込み温度検知装置15と、室外熱交換器検知装置9と、圧縮機2の運転電流を検知する圧縮機運転電流検知装置24と、圧縮機2の運転電流設定値を記憶する圧縮機運転電流設定記憶装置25(ここには低外気温度時の最低電流設定値と過負荷運転時の最高電流設定値が記憶されている)と、室内熱交換器温度検知装置14と室外熱交換器温度検知装置9から検出される温度との差 6, the control unit 17 of the air conditioning apparatus of the present embodiment, the operation mode changeover switch 18 (cooling, dehumidifying or heating) the resident and desired room temperature setting switch 19 and the operation stop switch 20 and the air volume setting switch 21 and the operation mode storage unit 23 for storing a signal of operation setting unit 16 is configured with air direction setting switch 22, an indoor heat exchanger temperature detector 14 and indoor suction temperature detecting device 15, an outdoor heat exchanger detecting device 9 and, the compressor operation current detection device 24 for detecting the operating current of the compressor 2, the compressor 2 operating current setting compressor operation current setting storage unit stores the value 25 (here the lowest in the low outside air temperature the difference between the current setpoint and an overload maximum current setting value at the time of operation is stored), and the temperature detected by the indoor heat exchanger temperature detector 14 and the outdoor heat exchanger temperature detector 9 設定値を記憶する差温設定記憶装置32と、以上の信号を定期的に検出するためのサンプリング時間を設定する運転時間設定記憶装置28aと差温設定の継続時間を記憶する運転時間設定記憶装置28bと、以上の信号をサンプリング時間毎に受けて圧縮機2、室内送風機12、室外送風機4等の運転を決定する判定装置29と、判定装置29の信号により、圧縮機2や室内送風機12、室外送風機4等を駆動する出力リレー回路30を有している。 A differential temperature setting storage unit 32 for storing the set value, or more signals periodically set the sampling time for detecting operation time setting storage unit 28a and the differential temperature set operation time setting memory for storing the duration of compressor 2 and 28b, the more signals received in each sampling time, the indoor blower 12, a determination unit 29 for determining the operation of such outdoor blower 4, the signal determination unit 29, the compressor 2 and the indoor blower 12, and an output relay circuit 30 for driving the outdoor blower 4 and the like.

冷房運転時、室外送風機4は室外熱交換器温度検知装置9から検出される温度を一定の温度(例えば45℃)に保つように、温度が低下すると回転数を下げ、凝縮温度を上げるように制御するように構成されている。 During the cooling operation, as the outdoor blower 4 keeps the temperature detected from the outdoor heat exchanger temperature detector 9 at a constant temperature (e.g. 45 ° C.), reduce the rotational speed and the temperature drops, so as to increase the condensing temperature It is configured to control. 居住者が運転モード切替スイッチ18で冷房、除湿または暖房を選択し運転を開始すると、運転モード記憶装置23、室内吸い込み温度検知装置15、室内温度設定装置19の信号により出力リレー回路30が圧縮機2を駆動するが、図7において、居住者が運転モード切替スイッチ18で冷房、除湿を選択した場合には(S33のY)、圧縮機2がサーモON判定で連続運転中に(S35のY)に、圧縮機運転電流検知装置24の検出値Icp(S36)が圧縮機運転電流設定記憶装置25に設定されている値の範囲内(例えば1.5A≦Icp≦30A)にあると(S37のY)、室外熱交換器温度検知装置9(Te)で検出された温度が凝縮温度設定記憶装置32の値(例えば30℃)以下かどうかを判定し(S39)、その状態が運 Cooling resident in the operating mode selector switch 18, when starting the selected operating dehumidification or heating, the operation mode storage unit 23, the indoor suction temperature detecting device 15, the output relay circuit 30 a signal of the room temperature setting device 19 is compressor driving the 2, but in FIG. 7, the cooling resident in the operating mode selector switch 18, if you select the dehumidification (the S33 Y), the compressor 2 during continuous operation thermo oN determination (S35 Y a), to be within the range of values ​​that the detection value Icp of compressor operation current detection device 24 (S36) is set to compressor operation current setting storage device 25 (e.g., 1.5A ≦ Icp ≦ 30A) (S37 of Y), the temperature detected by the outdoor heat exchanger temperature detector 9 (Te), it is determined whether the value of the condensation temperature setting storage device 32 (e.g., 30 ° C.) or less (S39), the state is luck 時間設定記憶装置28bの設定値(例えば3分)以上継続すると(S40のY)、圧縮機2を所定時間(例えば3分)停止し(S41)、時間経過後再起動する(S42)。 The set value of the time setting memory 28b (for example, 3 minutes) for longer than the (S40 of Y), the compressor 2 a predetermined time (e.g., 3 minutes) stop (S41), restarts after the time (S42).

前にも述べたように、冷房運転時および除湿運転時は、室外送風機4は凝縮温度を一定(例えば45℃)に保つように制御しているが、室外送風機4の回転数を制御しているのにもかかわらず、凝縮温度が一向に上昇しない場合は、冷媒が循環していないと判断し、停止するのが本参考例である。 As mentioned previously, cooling and during dehumidifying operation operation is outdoor blower 4 is controlled to keep the condensation temperature constant (e.g., 45 ° C.), by controlling the rotational speed of the outdoor blower 4 Despite are you, if the condensation temperature is not at all increased, it is determined that refrigerant has not circulated, to stop a present embodiment. 本参考例は、凝縮温度をある一定温度以下(例えば30℃以下)で判断するため、室外空気温度が30℃以上の高い温度で冷房運転している場合は判定ができなが、室外空気温度が高い状態で運転している場合、圧縮機2が瞬時停電で逆転すると逆転時に発生する過電流により圧縮機運転電流検知装置24の検出値Icp(S36)が圧縮機運転電流設定記憶装置25に設定されている値の範囲外になり(S37、43)(例えばIcp≧30A)過電流異常で停止(S44)するように制御が構成されている。 This reference example, the condensation to determine at a temperature below a certain temperature in a (e.g. 30 ° C. or less), if the outdoor air temperature is cooling operation at 30 ° C. higher than the temperature but such can determine, outdoor air temperature If is operating at a high state, the overcurrent compressor 2 is generated during reverse rotation to reverse instantaneous power failure detection value Icp (S36) is compressor operation current setting storage device 25 of the compressor operation current detection device 24 controlled to become the outside of that have been set value (S37,43) (e.g. Icp ≧ 30A) overcurrent abnormality in the stop (S44) is configured. よって、 本参考例は低外気温度冷房運転時に有効な制御である。 Thus, the present reference example is an effective control at low ambient temperature cooling operation.

そしてこの構成によれば、室外空気温検知装置がなくても冷房時の冷媒非循環が検知可能になるので、室外空気温度センサーが不要になり、コストダウンが図れる。 And according to this configuration, since the refrigerant non-circulation of the cooling without the outdoor air temperature detecting device is detectable, the outdoor air temperature sensor is not required, cost can be reduced. よって、シンプルでかつ低コストな空気調和装置が提供でき、電気回路が検知できない瞬時停電による圧縮機逆転により冷媒非循環状態になることによる空気調和装置の快適性の低下(冷えないや温まらないといった不具合)が回避できるとともに、圧縮機逆転による圧縮機や配管の破損を防止することができ、空気調和装置の快適性と信頼性が向上する。 Therefore, it provides simple and low-cost air conditioner is an electric circuit is said that lowering of comfort (no cold Ya warm without the air conditioning apparatus according to become refrigerant acyclic state by the compressor reverses by momentary power failure can not be detected with defect) can be avoided, it is possible to prevent damage to the compressor and pipes according to the compressor reverses, thereby improving the comfort and reliability of the air conditioner.

実施の形態2 (Embodiment 2)
本発明にかかる空気調和機の冷凍サイクル図は実施の形態1と同様なので説明は省略する。 A refrigeration cycle diagram of an air conditioner according to the present invention will be omitted the description is similar as in the first embodiment. 図8は制御ブロック図、図9はフローチャートである。 Figure 8 is a control block diagram, FIG. 9 is a flow chart. 本発明は、実施の形態1〜3に対し、圧縮機起動後から所定時間だけ各温度検出装置の非検知時間を設けたものであり、実施の形態1〜3全てに有効であるが、代表で実施の形態1に追加した構成として説明を行う。 The present invention is, with respect to the first to third embodiments, after the compressor starts having thereon a non-detection time for a predetermined time only the temperature sensing device is effective to form 1-3 all embodiments, a representative in a description as configuration obtained by adding to the first embodiment.

図8において、本発明の空気調和装置の制御装置17には、居住者が希望する運転モード切替スイッチ18(冷房、除湿または暖房)と室内温度設定スイッチ19と運転停止スイッチ20と風量設定スイッチ21と風向設定スイッチ22で構成されている運転設定装置16の信号を記憶する運転モード記憶装置23と、室内熱交換器温度検知装置14と室内吸込み温度検知装置15と、室外熱交換器検知装置9と、室外気温度検知装置10と、圧縮機2の運転電流を検知する圧縮機運転電流検知装置24と、圧縮機2の運転電流設定値を記憶する圧縮機運転電流設定記憶装置25(ここには低外気温度時の最低電流設定値と過負荷運転時の最高電流設定値が記憶されている)と、室内熱交換器温度検知装置14と室内吸込み温度検知装置15 8, the control unit 17 of the air conditioning apparatus of the present invention, the operation mode changeover switch 18 (cooling, dehumidifying or heating) the resident desires and room temperature setting switch 19 and the operation stop switch 20 air volume setting switch 21 and the operation mode storage unit 23 for storing a signal of operation setting unit 16 is configured with air direction setting switch 22, an indoor heat exchanger temperature detector 14 and indoor suction temperature detecting device 15, an outdoor heat exchanger detecting device 9 When, an outdoor air temperature detecting device 10, the compressor operation current detection device 24 for detecting the operating current of the compressor 2, the compressor 2 operating current setting compressor operation current setting storage unit stores the value 25 (here the low outside air minimum current set value of the time temperature and maximum current setting value at the time of overload operation is stored), the indoor heat exchanger temperature detector 14 and indoor suction temperature detecting device 15 ら検出される温度との差温設定値を記憶する室内差温設定記憶装置26と、室外熱交換器温度検知装置9と室外気温度検知装置10から検出される温度との差温設定値を記憶する室外差温設定記憶装置27と、以上の信号を定期的に検出するためのサンプリング時間を設定する運転時間設定記憶装置28aと差温設定の継続時間を記憶する運転時間設定記憶装置28bとサーモON(圧縮機運転開始)からの非検知時間を設定した運転時間設定記憶装置28cと、以上の信号をサンプリング時間毎に受けて圧縮機2、室内送風機12、室外送風機4等の運転を決定する判定装置29と、判定装置29の信号により、圧縮機2や室内送風機12、室外送風機4等を駆動する出力リレー回路30を有している。 An indoor difference temperature setting storage unit 26 for storing the differential temperature set value of the temperature to be al detected, the differential temperature set value of the temperature detected from the outdoor heat exchanger temperature detector 9 and the outdoor air temperature detecting device 10 an outdoor difference temperature setting memory unit 27 for storing the operation time setting storage unit 28b for storing the duration of periodically set the sampling time for detecting operation time setting storage unit 28a and the differential temperature set a more signals and operation time setting storage unit 28c which sets the non-detection time, or more signals sampled hourly to receiving the compressor 2, the indoor blower 12, the operation of such outdoor blower 4 determined from the thermo oN (compressor operation start) a determination device 29 which, by a signal determination unit 29, the compressor 2 and the indoor blower 12, and an output relay circuit 30 for driving the outdoor blower 4 and the like.

居住者が運転モード切替スイッチ18で冷房、除湿または暖房を選択し運転を開始すると、運転モード記憶装置23、室内吸い込み温度検知装置15、室内温度設定装置19の信号により出力リレー回路30が圧縮機2を駆動するが、居住者が運転モード切替スイッチ18で冷房、除湿または暖房を選択し運転を開始すると、運転モード記憶装置23、室内吸い込み温度検知装置15、室内温度設定装置19の信号により出力リレー回路30が圧縮機2を駆動するが、図9において、居住者が運転モード切替スイッチ18で冷房、除湿を選択した場合には(S2のY)、圧縮機2が運転を開始(サーモON)(S4)するが、運転開始から運転時間設定記憶装置28cに設定されている時間(例えば3分間)検知を行わず(S45のN)、3 Cooling resident in the operating mode selector switch 18, when starting the selected operating dehumidification or heating, the operation mode storage unit 23, the indoor suction temperature detecting device 15, the output relay circuit 30 a signal of the room temperature setting device 19 is compressor driving the 2, but cooling resident in the operating mode selector switch 18, when starting the selected operating dehumidification or heating, the operation mode storage unit 23, the indoor suction temperature detecting device 15, output from the signal of the room temperature setting device 19 Although the relay circuit 30 drives the compressor 2, 9, cooling resident in the operating mode switch 18, (Y in S2) if you choose the dehumidifier, compressor 2 starts the operation (thermo oN ) (S4) Suruga, the time set in the operation time setting storage device 28c from operation start (e.g. 3 minutes) without detecting (S45 of N), 3 経過後(S45のY)、圧縮機運転電流検知装置24の検出値Icp(S5)が圧縮機運転電流設定記憶装置25に設定されている値の範囲内(例えば1.5A≦Icp≦30A)にあると(S6のY)、室外熱交換器温度検知装置9(Tc)と室外気温度検知装置(Tgs)との検出値からそれらの温度差△Tを算出し(S7)、温度差△Tが室外差温設定記憶装置27の設定値(例えば3℃)以下かどうか判定し(S8)、その状態が運転時間設定記憶装置28bの設定値(例えば3分)以上継続すると(S9のY)、圧縮機2を所定時間(例えば3分)停止し(S10)、時間経過後再起動する(S11)。 After (S45 of Y), the range of values ​​that the detection value Icp of compressor operation current detection device 24 (S5) is set to compressor operation current setting storage device 25 (e.g., 1.5A ≦ Icp ≦ 30A) to be in (S6 of Y), the calculated their temperature difference △ T from the detection value of the outdoor heat exchanger temperature detector 9 and (Tc) outdoor air temperature detecting device and (Tgs) (S7), the temperature difference △ T the outdoor difference temperature setting memory unit 27 of the setting value (e.g., 3 ° C.) if it is determined whether the following (S8), is continued its state set value of the operation time setting storage device 28b (e.g. three minutes) or more (S9 of Y ), the compressor 2 a predetermined time (e.g. 3 minutes) stops (S10), it restarts after the time (S11).

居住者が運転モード切替スイッチ18で暖房を選択した場合には(S2のN)、圧縮機2が運転を開始(サーモON)(S13のY)するが、運転開始から運転時間設定記憶装置28cに設定されている時間(例えば3分間)検知を行わず(S46のN)、3分経過後(S46のY)、圧縮機運転電流検知装置24の検出値Icp(S14)が圧縮機運転電流設定記憶装置25に設定されている値の範囲内(例えば1.5A≦Icp≦30A)にあると(S15のY)、室内熱交換器温度検知装置14(Te)と室内吸込み空気温度検知装置15(Tns)との検出値からそれらの温度差△Tを算出し(S16)、温度差△Tが室内差温設定記憶装置26の設定値(例えば3℃)以下かどうか判定し(S17)、その状態が運転時間設定記憶 If the resident has selected the heating in operation mode changeover switch 18 (S2 in N), the compressor 2 is started (thermo ON) the operation (S13: Y) Suruga, the operation from the operation start time setting memory 28c without detection have been set time (e.g., 3 minutes) to (S46 of N), after 3 minutes (in S46 Y), the detection value Icp of compressor operation current detection device 24 (S14) is compressor operation current within the values ​​set in the setting storage unit 25 (e.g., 1.5A ≦ Icp ≦ 30A) to be in (S15 of Y), the indoor heat exchanger temperature detector 14 (Te) and the indoor suction air temperature detecting device 15 calculates their temperature difference △ T from the detected value of (Tns) (S16), the temperature difference △ T is set value of the room differential temperature setting storage device 26 (e.g., 3 ° C.) if it is determined whether the following (S17) , the state is operating time setting storage 置28bの設定値(例えば3分)以上継続すると(S18のY)、圧縮機2を所定時間(例えば3分)停止し(S19)、時間経過後再起動する(S20)。 Continuing the set value of the location 28b (e.g. three minutes) or more (S18 of Y), the compressor 2 a predetermined time (e.g., 3 minutes) stop (S19), restarts after the time (S20).

この非検知時間を設ける理由は、圧縮機起動から冷媒が循環し熱交換器温度が上昇したり下降するのに時間がかかる。 The reason for providing the non-detection time, take time to refrigerant from the compressor start circulating heat exchanger temperature is lowered or raised. 特に長時間停止時は冷媒が圧縮機内部に寝込み状態にあるので冷媒が循環するに要する時間がかかる。 Take time required for the refrigerant circulates especially since long quiescent period is in the state stagnation inside the refrigerant compressor. この間を非検知にしないと、圧縮機逆転による冷媒非循環と圧縮機起動直後による冷媒循環不足(時間的な遅れ)とを判別できず誤動作で起動後即停止してしまうからである。 Otherwise between this non-detection, because thus stops immediately after startup in malfunction can not determine a coolant circulation insufficiency (time delay) by just the compressor starts and the refrigerant non-circulation by the compressor reverse.

そしてこの構成によれば、電気回路が検知できない瞬時停電による圧縮機逆転により冷媒非循環状態になることによる空気調和装置の快適性の低下(冷えないや温まらないといった不具合)が回避できるとともに、圧縮機逆転による圧縮機や配管の破損を防止することができ、空気調和装置の快適性と信頼性が向上する。 And according to this configuration, the decrease in the comfort of the air conditioner of becoming a refrigerant acyclic state by the compressor reverses by a momentary power failure of the electrical circuit can not be detected (cold not Ya inconvenience not warm) can be avoided, compression it is possible to prevent damage of the compressor and piping by the machine reverses, thus improving comfort and reliability of the air conditioner. 特に、圧縮機起動後非検知時間を設けることにより、誤動作の心配がなくなり、空気調和装置の快適性と信頼性がなお一層向上する。 In particular, by providing the non-detection time after the compressor starts, there is no fear of erroneous operation, comfort and reliability of the air conditioner is still further improved.

以上のように、本発明にかかる空気調和装置は、単相一定速度圧縮機の逆転による冷媒不循環の不具合を解決するものであるが、他の理由による(バルブ閉塞等)の冷媒不循環に対しても応用できる。 As described above, the air conditioner according to the present invention is intended to solve the problem of the refrigerant non circulation by reversal of the single-phase constant speed compressor, the refrigerant non circulation for other reasons (valve clogging) also for it can be applied.

本発明の空気調和装置の実施の形態1 または2、参考例1または2における冷凍サイクル図 The first or second embodiment of the air conditioner of the present invention, the refrigeration cycle diagram in Reference Example 1 or 2 実施の形態1における制御ブロック図 Control block diagram of the first embodiment 実施の形態1におけるフローチャート Flowchart in the first embodiment 参考例1における制御ブロック図 Control block diagram of the Reference Example 1 参考例1におけるフローチャート Flowchart of Reference Example 1 参考例2における制御ブロック図 Control block diagram in Reference Example 2 参考例2におけるフローチャート Flowchart in Reference Example 2 実施の形態2における制御ブロック図 Control block diagram in the second embodiment 実施の形態2におけるフローチャート Flowchart in the second embodiment

1 室外機 2 圧縮機 3 室外熱交換器 4 室外送風機 5 冷媒液管 6 冷媒ガス管 7 四方弁 8 絞り装置 9 室外熱交換器温度検知装置 10 室外空気温度検知装置 11 室内機 12 室内送風機 13 室内熱交換器 14 室内熱交換器温度検知装置 15 室内吸込み空気温度検知装置 16 室内風向変更装置 1 outdoor unit 2 compressor 3 outdoor heat exchanger 4 outdoor blower 5 refrigerant liquid pipe 6 refrigerant gas pipe 7 four-way valve 8 throttling device 9 outdoor heat exchanger temperature detector 10 outdoor air temperature detecting device 11 indoor unit 12 indoor blower 13 chamber heat exchanger 14 indoor heat exchanger temperature detector 15 indoor return air temperature detector 16 indoor air direction changing device

Claims (2)

  1. 一定速の圧縮機、室外熱交換器、室外送風機、4方弁、絞り装置を有する室外機と、室内熱交換器、室内送風機を有する室内機と、前記室外機に室外空気温度検出装置と室外熱交換器温度検出装置と、前記圧縮機の運転電流値を検知する圧縮機運転電流検知装置と、前記圧縮機の運転時の最低運転電流値および最高運転電流値を記憶する圧縮機運転電流設定記憶装置と 、前記室内機に室内吸込み空気温度検出装置と室内熱交換器温度検出装置とを設け、少なくとも冷房運転または除湿運転または暖房運転を行う空気調和装置において、 前記圧縮機運転電流検知装置で検知する値が前記圧縮機運転電流設定記憶装置に記憶されている最低運転電流値と最高運転電流値の範囲内で前記圧縮機が運転中である場合に 、冷房もしくは除湿運転中であれ Constant speed compressor, an outdoor heat exchanger, an outdoor fan, 4-way valve, an outdoor unit having a throttle device, the indoor heat exchanger, and an indoor unit having an indoor fan, the outdoor air temperature detecting device and the outdoor to the outdoor unit and the heat exchanger temperature detector, the compressor operation current detection device for detecting the operating current of the compressor, compressor operation current setting for storing the minimum operating current value and the maximum operating current during operation of the compressor a storage device, and an indoor suction air temperature detector and the indoor heat exchanger temperature detector provided in the indoor unit, the air conditioning apparatus performing at least cooling operation or dehumidifying operation or heating operation, in the compressor operation current detection device when the compressor value detected within the minimum operating current and maximum operating current value stored in the compressor operation current setting storage device is in operation, it is in the cooling or dehumidifying operation 、室外空気温度と室外熱交換器温度との差が所定温度以下の状態を所定時間継続した場合に、または、暖房運転中であれば、室内吸込み空気温度と室内熱交換器温度との差が所定温度以下の状態を所定時間継続した場合に、前記圧縮機の運転を停止し、所定時間停止後再起動する制御装置を設けたことを特徴とする空気調和装置。 , When the difference between the outdoor air temperature and outdoor heat exchanger temperature continues for a predetermined time the following state for a predetermined temperature, or, if during the heating operation, the difference between the indoor intake air temperature and the indoor heat exchanger temperature when the predetermined temperature following state continues for a predetermined time, stops the operation of the compressor, an air conditioning apparatus is characterized by providing a control device to restart after a predetermined time is stopped.
  2. 圧縮機の起動から所定時間だけ各温度検出装置の非検知時間を設けた請求項1に記載の空気調和装置。 Air conditioning apparatus according to claim 1, wherein the provided non-detection time from start of the compressor predetermined time only the temperature sensing device.
JP2005345668A 2005-11-30 2005-11-30 Air conditioning apparatus Expired - Fee Related JP4710571B2 (en)

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Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055564A (en) * 1991-06-28 1993-01-14 Toshiba Corp Air conditioner
JPH07174386A (en) * 1993-12-17 1995-07-14 Mitsubishi Heavy Ind Ltd Separate type air-conditioning machine
JPH07218059A (en) * 1994-02-02 1995-08-18 Hitachi Ltd Air conditioner provided with reverse rotation-preventing function
JP2003090582A (en) * 2001-09-20 2003-03-28 Fujitsu General Ltd Control method for air conditioner
JP2003139418A (en) * 2001-10-31 2003-05-14 Daikin Ind Ltd Air conditioner
JP2003152250A (en) * 2001-11-14 2003-05-23 Matsushita Electric Ind Co Ltd Cooling device for laser oscillator
JP2003279110A (en) * 2002-03-25 2003-10-02 Hitachi Ltd Air conditioner

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH055564A (en) * 1991-06-28 1993-01-14 Toshiba Corp Air conditioner
JPH07174386A (en) * 1993-12-17 1995-07-14 Mitsubishi Heavy Ind Ltd Separate type air-conditioning machine
JPH07218059A (en) * 1994-02-02 1995-08-18 Hitachi Ltd Air conditioner provided with reverse rotation-preventing function
JP2003090582A (en) * 2001-09-20 2003-03-28 Fujitsu General Ltd Control method for air conditioner
JP2003139418A (en) * 2001-10-31 2003-05-14 Daikin Ind Ltd Air conditioner
JP2003152250A (en) * 2001-11-14 2003-05-23 Matsushita Electric Ind Co Ltd Cooling device for laser oscillator
JP2003279110A (en) * 2002-03-25 2003-10-02 Hitachi Ltd Air conditioner

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