JP2016017725A - Air conditioner - Google Patents

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JP2016017725A
JP2016017725A JP2014143020A JP2014143020A JP2016017725A JP 2016017725 A JP2016017725 A JP 2016017725A JP 2014143020 A JP2014143020 A JP 2014143020A JP 2014143020 A JP2014143020 A JP 2014143020A JP 2016017725 A JP2016017725 A JP 2016017725A
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defrosting
heat exchanger
outdoor
temperature
defrosting operation
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JP6266456B2 (en
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豪 宮尾
Takeshi Miyao
豪 宮尾
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Corona Corp
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Abstract

PROBLEM TO BE SOLVED: To eliminate some defects found in the prior art that although a pre-defrosting operation is forcedly carried out before performing a defrosting operation until a room temperature becomes a higher value than a set temperature, if the room temperature does not drop well during defrosting operation, electrical power is consumed in a useless manner.SOLUTION: In the case where a defrosting operation in a previous time is operated within a prescribed operating time, frost generated at an outdoor heat exchanger is hardly removed and it is expected that an indoor air temperature is also decreased, so that a pre-defrosting operation is carried out before a defrosting operation of this time is performed and the room temperature is increased in advance to enable a loss of heating feeling to be prevented and at the same time in the case where the defrosting operation of the previous time is less than the prescribed time, the pre-defrosting operation is not carried out to enable a useless consumption of electrical power to be reduced.SELECTED DRAWING: Figure 2

Description

この発明は、除霜運転を行う空気調和機に関するものである。   The present invention relates to an air conditioner that performs a defrosting operation.

従来より、この種の空気調和機において、冷凍サイクル中の圧縮機で高温にされた冷媒を室内熱交換器に流入し、室内ファンで室内空気を室内熱交換器に供給して暖房運転を行う空気調和機があり、暖房運転中に外気温が低い状態で冷凍サイクルに低温の冷媒が流動していると室外熱交換器に着霜が発生し、室外熱交センサでの検出温度が除霜開始温度以下になると、室内ファンと室外ファンを停止させ、冷媒を逆方向に流動させることで室外熱交換器の除霜を実施する除霜運転を行うことが知られている。 Conventionally, in this type of air conditioner, a refrigerant that has been heated to high temperature by a compressor in a refrigeration cycle flows into an indoor heat exchanger, and indoor air is supplied to the indoor heat exchanger by an indoor fan to perform heating operation. If there is an air conditioner and low temperature refrigerant flows in the refrigeration cycle while the outside air temperature is low during heating operation, frost formation occurs in the outdoor heat exchanger, and the temperature detected by the outdoor heat exchange sensor is defrosted. It is known to perform a defrosting operation for defrosting the outdoor heat exchanger by stopping the indoor fan and the outdoor fan and causing the refrigerant to flow in the reverse direction when the temperature is lower than the start temperature.

しかし、この除霜運転を開始すると暖房運転は一時停止状態となるため、冬場では室温が徐々に低下していき、設定温度を下回ってしまうとユーザーに不快感をあたえてしまう。   However, since the heating operation is temporarily stopped when the defrosting operation is started, the room temperature gradually decreases in winter, and the user feels uncomfortable if the temperature falls below the set temperature.

そこで、除霜運転にはいる前に強制的に設定温度よりも高い室温になるように強制暖房運転を行い、予め部屋の室温を設定温度よりも高い室温とする除霜前運転を行うことで、除霜運転中に暖房運転が一時停止してしまっても、設定温度よりも室温が下回り、ユーザーに不快感を与えないようにするものが知られている（特許文献１）。   Therefore, before entering the defrosting operation, the forced heating operation is forcibly performed so that the room temperature is higher than the set temperature, and the room temperature in the room is set to a room temperature higher than the set temperature in advance. In addition, even if the heating operation is temporarily stopped during the defrosting operation, there is known one that prevents the user from feeling uncomfortable because the room temperature falls below the set temperature (Patent Document 1).

特開２０１０―９６４７４号公報JP 2010-96474 A

しかし、特許文献１のような除霜運転前の暖房運転は強制的に設定温度よりも高い室温になるまで行われるものであり、除霜運転がすぐに終了して通常の暖房運転に切り替わり、除霜運転中に室温がそれほど下がらなかった場合などでは消費電力の無駄になってしまう。   However, the heating operation before the defrosting operation as in Patent Document 1 is forcibly performed until the room temperature is higher than the set temperature, and the defrosting operation ends immediately and switches to the normal heating operation. When the room temperature does not drop so much during the defrosting operation, the power consumption is wasted.

本発明は上記課題を解決するため、冷媒を圧縮する圧縮機と、室内に配される室内熱交換器と、冷媒を減圧する膨張弁と、室外に配される室外熱交換器とを環状に接続した冷凍サイクルと、該冷凍サイクル途中に設置され冷媒の流動方向を変更する流路切替手段と、室内の空気を前記室内熱交換器に供給する室内ファンと、室外の空気を前記室外熱交換器に供給する室外ファンと、前記室外熱交換器の温度を検出する室外熱交センサと、室温がユーザーの所望した設定温度になるように機器の運転を制御する制御装置とを備え、前記制御装置は前記圧縮機を駆動させて前記室内熱交換器へ冷媒を流動させる暖房運転を行うと共に、前記室外熱交センサで除霜開始温度以下の温度を検出したら、前記室内ファン及び前記室外ファンを停止させ、前記流路切替手段により前記暖房運転時と逆方向に冷媒を流動させる除霜運転と、前記除霜運転の直前に前記設定温度よりも所定値高い室温になるように暖房を行う除霜前運転とを制御する事ができる空気調和機において、前記空気調和機に前回の除霜運転の運転時間を記憶する記憶手段を設け、前記制御装置は前記記憶手段に記憶された前記除霜運転時間が所定運転時間以上だった場合は前記除霜前運転を行い、所定運転時間未満の場合は前記除霜前運転を行わないようにした。 In order to solve the above-described problems, the present invention provides a compressor that compresses refrigerant, an indoor heat exchanger that is disposed indoors, an expansion valve that decompresses the refrigerant, and an outdoor heat exchanger that is disposed outdoors. A connected refrigeration cycle, flow path switching means installed in the middle of the refrigeration cycle to change the flow direction of the refrigerant, an indoor fan for supplying indoor air to the indoor heat exchanger, and outdoor air for the outdoor heat exchange An outdoor fan to be supplied to the outdoor unit, an outdoor heat exchange sensor for detecting the temperature of the outdoor heat exchanger, and a control device for controlling the operation of the device so that the room temperature becomes a set temperature desired by the user. The apparatus drives the compressor to perform a heating operation in which the refrigerant flows to the indoor heat exchanger, and when the outdoor heat exchange sensor detects a temperature not higher than the defrosting start temperature, the indoor fan and the outdoor fan are turned on. Stop, A defrosting operation in which the refrigerant is caused to flow in a direction opposite to that during the heating operation by the flow path switching unit, and a prefrosting operation in which heating is performed so that the room temperature is higher by a predetermined value than the set temperature immediately before the defrosting operation. The air conditioner is provided with storage means for storing the operation time of the previous defrosting operation in the air conditioner, and the control device stores the defrosting operation time stored in the storage means. The operation before the defrosting is performed when the operation time is longer than the predetermined operation time, and the operation before the defrosting is not performed when the operation time is less than the predetermined operation time.

また、冷媒を圧縮する圧縮機と、室内に配される室内熱交換器と、冷媒を減圧する膨張弁と、室外に配される室外熱交換器とを環状に接続した冷凍サイクルと、該冷凍サイクル途中に設置され冷媒の流動方向を変更する流路切替手段と、室内の空気を前記室内熱交換器に供給する室内ファンと、室外の空気を前記室外熱交換器に供給する室外ファンと、前記室外熱交換器の温度を検出する室外熱交センサと、室温がユーザーの所望した設定温度になるように機器の運転を制御する制御装置とを備え、前記制御装置は前記圧縮機を駆動させて前記室内熱交換器へ冷媒を流動させる暖房運転を行うと共に、前記室外熱交センサで除霜開始温度以下の温度を検出したら、前記室内ファン及び前記室外ファンを停止させ、前記流路切替手段により前記暖房運転時と逆方向に冷媒を流動させる除霜運転と、前記除霜運転の直前に前記設定温度よりも所定値高い室温になるように暖房を行う除霜前運転とを制御する事ができる空気調和機において、前記空気調和機に前回の除霜運転終了時間を記憶する記憶手段を設け、前記記憶手段に記憶された除霜運転終了時間から次の除霜運転が行われるまでの経過時間が所定経過時間以下である場合は前記除霜前運転を行い、所定経過時間を超えていた場合は前記除霜前運転を行わないようにした。 A compressor that compresses the refrigerant; an indoor heat exchanger that is disposed indoors; an expansion valve that decompresses the refrigerant; and an outdoor heat exchanger that is disposed outdoors. A flow path switching means installed in the middle of the cycle to change the flow direction of the refrigerant, an indoor fan for supplying indoor air to the indoor heat exchanger, an outdoor fan for supplying outdoor air to the outdoor heat exchanger, An outdoor heat exchanger sensor that detects the temperature of the outdoor heat exchanger; and a control device that controls the operation of the device so that the room temperature becomes a set temperature desired by the user, and the control device drives the compressor. When the heating operation for causing the refrigerant to flow to the indoor heat exchanger is performed and a temperature equal to or lower than the defrosting start temperature is detected by the outdoor heat exchange sensor, the indoor fan and the outdoor fan are stopped, and the flow path switching unit By the above It is possible to control a defrosting operation in which the refrigerant flows in a direction opposite to that during the cell operation and a pre-defrosting operation in which heating is performed so that the room temperature is higher by a predetermined value than the set temperature immediately before the defrosting operation. In the air conditioner, a storage unit that stores a previous defrosting operation end time is provided in the air conditioner, and an elapsed time from the defrosting operation end time stored in the storage unit until the next defrosting operation is performed. Is less than a predetermined elapsed time, the operation before the defrosting is performed, and when the predetermined elapsed time is exceeded, the operation before the defrosting is not performed.

この発明の請求項１によれば、室内の温度が下がらないと予想される短時間での除霜運転でも一律に除霜前運転を行うのでは電力消費の無駄になる。前回の除霜運転時間が長時間だった場合は室外熱交換器についた霜が取れにくい状況であり、室内温度も下がると予想されるので、今回の除霜運転の前には除霜前運転を行い、予め室温を上げておくことで暖房感の喪失が防止できると共に、除霜前運転が必要なときのみに除霜前運転を行う事で、無駄な電力消費を削減することができる。 According to the first aspect of the present invention, power consumption is wasted if the pre-defrosting operation is performed uniformly even in the defrosting operation in a short time when the indoor temperature is expected not to drop. If the last defrosting operation time is long, it is difficult to remove the frost on the outdoor heat exchanger and the indoor temperature is expected to decrease. In addition to preventing the loss of heating feeling by raising the room temperature in advance, wasteful power consumption can be reduced by performing the pre-defrost operation only when the pre-defrost operation is required.

また、この発明の請求項２によれば、室内の温度が下がらないと予想される短時間での除霜運転でも一律に除霜前運転を行うのでは電力消費の無駄になる。前回の除霜運転終了から今回除霜運転要求された時の経過時間が短かった場合は室外熱交換器に霜がつきやすい状況であり、室内温度も下がると予想されるので、今回の除霜運転の前には除霜前運転を行い、予め室温を上げておくことで暖房感の喪失が防止できると共に、除霜前運転が必要なときのみに除霜前運転を行う事で、無駄な電力消費を削減することができる。 According to the second aspect of the present invention, even if the defrosting operation is performed in a short time when the indoor temperature is expected not to drop, the power consumption is wasted if the operation before the defrosting is performed uniformly. If the elapsed time from the end of the previous defrost operation to the time when this defrost operation is requested is short, the outdoor heat exchanger is prone to frost and the indoor temperature is expected to decrease. Before operation, perform the pre-defrost operation and raise the room temperature in advance to prevent the loss of heating feeling, and perform the pre-defrost operation only when the pre-defrost operation is necessary. Power consumption can be reduced.

この発明の１実施形態を示す概略構成図Schematic configuration diagram showing one embodiment of the present invention 同発明の第１実施形態の動作を説明するフローチャートFlowchart for explaining the operation of the first embodiment of the invention 同発明の第２実施形態の動作を説明するフローチャートFlow chart for explaining the operation of the second embodiment of the invention

次にこの発明を適用した空気調和機の１実施形態を図に基づいて説明する。
１は室内に設置された室内機、２は室外に設置された室外機であり、室内機１と室外機２とを配管で接続した冷凍サイクル３内を冷媒が流動することで、冷房運転や暖房運転を行うことが可能な空気調和機を構成している。 Next, one embodiment of an air conditioner to which the present invention is applied will be described with reference to the drawings.
1 is an indoor unit installed indoors, 2 is an outdoor unit installed outdoor, and the refrigerant flows in the refrigeration cycle 3 in which the indoor unit 1 and the outdoor unit 2 are connected by piping, An air conditioner capable of performing heating operation is configured.

４は複数のパイプ内を冷媒が流動する室内熱交換器、５は前記室内熱交換器４に室内の空気を供給する室内ファンとしてのクロスフローファン、６は室内の温度を検出するための室温センサで、それぞれ前記室内機１内に備えられており、高温や低温の冷媒を室内熱交換器４に流通させ、室内空気をクロスフローファン５の駆動によって室内熱交換器４に供給することで、室内機１が備えられた部屋の空調を行う。   4 is an indoor heat exchanger in which refrigerant flows in a plurality of pipes, 5 is a cross-flow fan as an indoor fan that supplies indoor air to the indoor heat exchanger 4, and 6 is a room temperature for detecting the indoor temperature. Each of the sensors is provided in the indoor unit 1, and a high-temperature or low-temperature refrigerant is circulated through the indoor heat exchanger 4, and indoor air is supplied to the indoor heat exchanger 4 by driving the cross flow fan 5. The room in which the indoor unit 1 is provided is air-conditioned.

７は冷媒を圧縮させて高温高圧にする圧縮機、８は冷媒の流動方向を変化させる流路切替手段としての四方弁、９は冷媒を膨張させて低温低圧にする膨張弁、１０は内部に備えられた複数のパイプ内を冷媒が流動する室外熱交換器、１１は前記室外熱交換器１０に向けて外気を供給する室外ファンとしての送風ファン、１２は前記室外熱交換器１０の温度を検出する室外熱交センサで、それぞれ前記室外機２内に備えられている。   7 is a compressor that compresses the refrigerant to high temperature and high pressure, 8 is a four-way valve as flow path switching means that changes the flow direction of the refrigerant, 9 is an expansion valve that expands the refrigerant to low temperature and low pressure, 10 is inside An outdoor heat exchanger in which a refrigerant flows through a plurality of pipes provided, 11 is a blower fan as an outdoor fan that supplies outside air toward the outdoor heat exchanger 10, and 12 is a temperature of the outdoor heat exchanger 10. The outdoor heat exchange sensors to be detected are provided in the outdoor unit 2, respectively.

１３は各温度センサの出力に基づいて所定の演算を行い機器の運転を制御する制御装置、１４は制御装置１３内に設けられた過去の除霜運転の情報を記憶する記憶手段である。   Reference numeral 13 denotes a control device that performs a predetermined calculation based on the output of each temperature sensor to control the operation of the device, and reference numeral 14 denotes a storage unit that stores information on past defrosting operations provided in the control device 13.

次に冷房運転について説明する。
四方弁８が図１の破線で示した方に切り替わって圧縮機７が駆動し、圧縮機７で圧縮された高温高圧となった冷媒が破線の矢印方向に流動して室外熱交換器１０内に流入し、凝縮器として働く室外熱交換器１０に流入した冷媒は送風ファン１１で供給された室外空気によって凝縮する。 Next, the cooling operation will be described.
The four-way valve 8 is switched to the direction indicated by the broken line in FIG. 1 and the compressor 7 is driven, and the high-temperature and high-pressure refrigerant compressed by the compressor 7 flows in the direction of the arrow in the broken line to enter the outdoor heat exchanger 10. The refrigerant flowing into the outdoor heat exchanger 10 acting as a condenser is condensed by the outdoor air supplied by the blower fan 11.

室外熱交換器１０から膨張弁９に流入した冷媒は膨張され低温低圧となり、蒸発器として働く室内熱交換器４に冷媒が流入してクロスフローファン５で供給された室内空気の熱を吸熱してガス冷媒に状態変化し圧縮機７に流入する。このように冷凍サイクル３内を冷媒が流動することで冷房運転が可能となる。 The refrigerant flowing into the expansion valve 9 from the outdoor heat exchanger 10 is expanded and becomes low-temperature and low-pressure, and the refrigerant flows into the indoor heat exchanger 4 that functions as an evaporator and absorbs the heat of the indoor air supplied by the crossflow fan 5. The state changes to a gas refrigerant and flows into the compressor 7. In this way, the refrigerant flows in the refrigeration cycle 3 so that the cooling operation can be performed.

また、暖房運転について説明する。
四方弁８が図１の実線で示した方に切り替わって圧縮機７が駆動し、圧縮機７で圧縮され高温高圧となった冷媒が図１中の実線の矢印方向に流動して、室内熱交換器３が凝縮器として働くことで、クロスフローファン５で供給された室内空気が加熱され、室内に温風が送風される。 Moreover, heating operation is demonstrated.
The four-way valve 8 is switched to the direction indicated by the solid line in FIG. 1 and the compressor 7 is driven, and the refrigerant compressed to high temperature and high pressure by the compressor 7 flows in the direction indicated by the solid line in FIG. When the exchanger 3 functions as a condenser, the room air supplied by the cross flow fan 5 is heated, and warm air is blown into the room.

室内熱交換器３から流出した冷媒は膨張弁９で膨張され低温低圧となって室外熱交換器１０に流入し、蒸発器として働く室外熱交換器１０に流入した冷媒は送風ファン１１で供給された室外空気によって蒸発し、ガス冷媒に状態変化し圧縮機７に流入する。このように冷凍サイクル３内を冷媒が流動することで暖房運転が可能になる。 The refrigerant that has flowed out of the indoor heat exchanger 3 is expanded by the expansion valve 9, becomes low temperature and low pressure, flows into the outdoor heat exchanger 10, and the refrigerant that flows into the outdoor heat exchanger 10 that functions as an evaporator is supplied by the blower fan 11. It evaporates by the outdoor air, changes its state to a gas refrigerant, and flows into the compressor 7. As described above, the refrigerant flows in the refrigeration cycle 3 so that the heating operation can be performed.

次に除霜運転について説明する。
暖房運転中において、室外熱交センサ１２で検出された温度が除霜運転開始温度以下（ここでは−１５℃以下）である場合、室外熱交換器１０の温度が低く着霜量が増加しており、このまま暖房運転を継続すると更に着霜量が増加して暖房効率が低下するため、制御装置１３は、四方弁８の弁方向を切り替えて冷房運転時と同じ方向に冷媒を流動させることで、圧縮機７で高温高圧に加熱された冷媒を室外熱交換器１０に流入して着霜を溶かす除霜運転を行う。 Next, the defrosting operation will be described.
During the heating operation, when the temperature detected by the outdoor heat exchange sensor 12 is equal to or lower than the defrosting operation start temperature (here, −15 ° C. or lower), the temperature of the outdoor heat exchanger 10 is low and the amount of frost formation increases. If the heating operation is continued as it is, the amount of frost formation further increases and the heating efficiency decreases. Therefore, the control device 13 switches the valve direction of the four-way valve 8 to flow the refrigerant in the same direction as in the cooling operation. The defrosting operation is performed in which the refrigerant heated to high temperature and high pressure by the compressor 7 flows into the outdoor heat exchanger 10 to melt frost.

そして、除霜運転を開始してから最大除霜運転時間（ここでは１２分）を経過、または、熱交温度センサ１２が除霜運転終了温度以上（ここでは８℃以上）を検出した場合は除霜運転を終了し、暖房運転を再開する。 When the maximum defrosting operation time (12 minutes here) has elapsed since the start of the defrosting operation, or when the heat exchange temperature sensor 12 detects the defrosting operation end temperature or higher (here, 8 ° C or higher). The defrosting operation is terminated and the heating operation is resumed.

また、暖房運転が再開されたあとに、再び室外熱交センサ１２で検出された温度が除霜運転開始温度に達したとしても前回の除霜運転終了から除霜運転禁止時間（ここでは４０分）経過しないと次の除霜運転が行われないようになっている。 Further, even after the heating operation is resumed, even if the temperature detected by the outdoor heat exchange sensor 12 reaches the defrosting operation start temperature again, the defrosting operation prohibition time (in this case, 40 minutes) from the end of the previous defrosting operation is reached. ) The next defrosting operation is not performed unless it elapses.

次に除霜前運転について説明する。
通常、除霜運転中は室温が徐々に下がっていくため、除霜運転を行う直前に予め強制暖房による除霜前運転を行い、ユーザーが設定した設定温度より所定値（ここでは２℃）高い室温まで温度を上げるようにしているものである Next, the operation before defrosting will be described.
Usually, since the room temperature gradually decreases during the defrosting operation, the operation before the defrosting by forced heating is performed in advance immediately before the defrosting operation, and is higher by a predetermined value (here, 2 ° C.) than the set temperature set by the user. It is intended to raise the temperature to room temperature

そして、本発明の除霜前運転の第１実施形態について図２のフローチャートに基づいて説明する。ただし、第１実施形態で説明する所定運転時間は１２分とする。
暖房運転中であり（Ｓ１）、室外熱交センサ１２で検出された温度が除霜運転開始温度である−１５℃以下になったら（Ｓ２）、制御装置１３内の記憶手段１４は前回の除霜運転時間が１２分以上だったかを確認し（Ｓ３）、前回の除霜運転時間が１２分未満だった場合は除霜前運転を行わず、除霜運転を開始する（Ｓ４）。 And 1st Embodiment of the operation before defrosting of this invention is described based on the flowchart of FIG. However, the predetermined operation time described in the first embodiment is 12 minutes.
When the heating operation is being performed (S1) and the temperature detected by the outdoor heat exchange sensor 12 is equal to or lower than −15 ° C. which is the defrosting operation start temperature (S2), the storage unit 14 in the control device 13 stores the previous removal. It is confirmed whether the frost operation time is 12 minutes or more (S3). If the previous defrost operation time is less than 12 minutes, the pre-defrost operation is not performed and the defrost operation is started (S4).

また、前回の除霜運転の時間が１２分以上だった場合は除霜前運転を開始する（Ｓ５）。その後、ユーザーが設定した室温の設定温度よりも２℃高くなったら（Ｓ６）、除霜前運転を終了し（Ｓ７）、除霜運転を開始する（Ｓ４）。 Moreover, when the time of the last defrost operation is 12 minutes or more, the operation before defrost is started (S5). Then, if it becomes 2 degreeC higher than the set temperature of the room temperature set by the user (S6), the operation before defrosting is terminated (S7), and the defrosting operation is started (S4).

そして、除霜運転を開始してから最大除霜運転時間の１２分経過、または、室外熱交センサ１２が除霜運転終了温度の８℃以上に達した場合は（Ｓ８）、除霜運転を終了し（Ｓ９）、暖房運転を再開する。 Then, when 12 minutes of the maximum defrosting operation time has elapsed from the start of the defrosting operation, or when the outdoor heat exchange sensor 12 has reached the defrosting operation end temperature of 8 ° C. or higher (S8), the defrosting operation is performed. End (S9) and resume the heating operation.

このように、前回の除霜運転が所定運転時間以上の長時間で除霜していた時は、外気温が低く室外熱交換器１０の霜が除去しづらい状況であるため、今回の除霜運転も長時間の可能性があり、暖房運転が長時間行われないことで暖房感が喪失してしまうことが考えられるので、今回は除霜前運転を行い、予め室温を上げておくことで暖房感を喪失させないと共に、前回の除霜運転が所定時間未満の時は除霜前運転を行わないことで、除霜前運転による無駄な電力消費を削減することが出来る。 Thus, when the previous defrosting operation has been defrosting for a long period of time longer than the predetermined operation time, since the outside air temperature is low and frost in the outdoor heat exchanger 10 is difficult to remove, the current defrosting is performed. Since there is a possibility that the operation may take a long time and the heating feeling may be lost if the heating operation is not performed for a long time, this time by performing the operation before defrosting and raising the room temperature in advance A feeling of heating is not lost, and when the previous defrosting operation is less than a predetermined time, the pre-defrosting operation is not performed, so that useless power consumption due to the pre-defrosting operation can be reduced.

次に、図３に示すフローチャートに基づいて第２実施形態の作動を詳しく説明する。ここで、第１の実施形態と同一のものは同一の符号を付してその説明を省略する。また、第２実施形態で説明する所定経過時間は４０分とする。
暖房運転中であり（Ｓ１０）、室外熱交センサ１２で検出された温度が除霜運転開始温度である−１５℃以下になったら（Ｓ１１）、制御装置１３内の記憶手段１４は前回の除霜運転終了からの経過時間が所定経過時間である４０分以下であるか確認し（Ｓ１２）、前回の除霜運転終了から経過時間が所定経過時間を超えている場合は除霜前運転を行わず、除霜運転を開始する（Ｓ１３）。 Next, the operation of the second embodiment will be described in detail based on the flowchart shown in FIG. Here, the same components as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted. The predetermined elapsed time described in the second embodiment is 40 minutes.
When the heating operation is being performed (S10) and the temperature detected by the outdoor heat exchange sensor 12 is equal to or lower than −15 ° C., which is the defrosting operation start temperature (S11), the storage unit 14 in the control device 13 stores the previous removal. It is confirmed whether the elapsed time from the end of the frost operation is a predetermined elapsed time of 40 minutes or less (S12), and if the elapsed time from the end of the previous defrost operation exceeds the predetermined elapsed time, the operation before defrosting is performed. First, the defrosting operation is started (S13).

また、前回の除霜運転終了からの時間が所定経過時間４０分以下だった場合は除霜前運転を開始する（Ｓ１４）。その後、ユーザーが設定した室温の設定温度よりも２℃高くなったら（Ｓ１５）、除霜前運転を終了し（Ｓ１６）、除霜運転を開始する（Ｓ１３）。 In addition, when the time from the end of the previous defrosting operation is a predetermined elapsed time of 40 minutes or less, the operation before defrosting is started (S14). Then, if it becomes 2 degreeC higher than the set temperature of the room temperature set by the user (S15), the operation before defrosting is terminated (S16), and the defrosting operation is started (S13).

そして、除霜運転を開始してから最大除霜運転時間の１２分経過、または、室外熱交センサ１２が８℃以上に達した場合は（Ｓ１７）、除霜運転を終了し（Ｓ１８）、暖房運転を再開する。 And when 12 minutes of maximum defrost operation time passes after starting a defrost operation, or when the outdoor heat exchange sensor 12 reached 8 degreeC or more (S17), a defrost operation is complete | finished (S18), Resume heating operation.

このように、前回の除霜運転終了から次の除霜運転開始までの時間が所定経過時間以下である場合、外気温が低く室外熱交換器１０に着霜がしやすい状況である可能性があり、暖房運転が再開してもユーザー所望の設定温度まで室温が上がらないことが考えられるので、今回は除霜前運転を行い、予め室温を上げておくことで暖房感を喪失させないと共に、前回の除霜運転終了からの経過時間が所定経過時間を超えている時は除霜前運転を行わないことで、除霜前運転による無駄な電力消費を削減することが出来る。 Thus, when the time from the end of the previous defrosting operation to the start of the next defrosting operation is equal to or shorter than the predetermined elapsed time, the outdoor temperature may be low and the outdoor heat exchanger 10 may be easily frosted. Yes, even if heating operation resumes, the room temperature may not rise to the user's desired set temperature, so this time the operation before defrosting is performed and the feeling of heating is not lost by raising the room temperature in advance. When the elapsed time from the end of the defrosting operation exceeds the predetermined elapsed time, the operation before the defrosting is not performed, so that useless power consumption due to the operation before the defrosting can be reduced.

なお、本発明は第１及び第２実施形態に限定されるものではなく、要旨を変更しない範囲で改変する事を妨げるものではなく、例えば、第１実施形態で説明した所定運転時間を１２分としたが、１２分に限定されるものではなく、暖房感の喪失によりユーザーが不快と感じる室温まで温度が下がる長時間の所定運転時間であればよいものである。また第２実施形態で説明した所定経過時間を４０分としたが、４０分に限定されるものではなく、暖房運転が再開してもユーザーが所望した設定温度まで上がらないような短い所定経過時間ならよいものである。 In addition, this invention is not limited to 1st and 2nd embodiment, It does not prevent changing in the range which does not change a summary, For example, the predetermined operation time demonstrated in 1st Embodiment is 12 minutes. However, it is not limited to 12 minutes, and may be a long predetermined operation time in which the temperature is lowered to room temperature at which the user feels uncomfortable due to the loss of heating feeling. Moreover, although the predetermined elapsed time explained in the second embodiment is 40 minutes, it is not limited to 40 minutes, and a short predetermined elapsed time that does not increase to the set temperature desired by the user even when the heating operation is resumed. If it is good.

３ 冷凍サイクル
４ 室内熱交換器
５ クロスフローファン
７ 圧縮機
８ 流路切替手段
１０ 室外熱交換器
１１ 送風ファン
１２ 室外熱交センサ
１３ 制御装置
１４ 記憶手段 DESCRIPTION OF SYMBOLS 3 Refrigerating cycle 4 Indoor heat exchanger 5 Cross flow fan 7 Compressor 8 Flow path switching means 10 Outdoor heat exchanger 11 Blower fan 12 Outdoor heat exchange sensor 13 Controller 14 Storage means

Claims (2)

冷媒を圧縮する圧縮機と、室内に配される室内熱交換器と、冷媒を減圧する膨張弁と、室外に配される室外熱交換器とを環状に接続した冷凍サイクルと、該冷凍サイクル途中に設置され冷媒の流動方向を変更する流路切替手段と、室内の空気を前記室内熱交換器に供給する室内ファンと、室外の空気を前記室外熱交換器に供給する室外ファンと、前記室外熱交換器の温度を検出する室外熱交センサと、室温がユーザーの所望した設定温度になるように機器の運転を制御する制御装置とを備え、前記制御装置は前記圧縮機を駆動させて前記室内熱交換器へ冷媒を流動させる暖房運転を行うと共に、前記室外熱交センサで除霜開始温度以下の温度を検出したら、前記室内ファン及び前記室外ファンを停止させ、前記流路切替手段により前記暖房運転時と逆方向に冷媒を流動させる除霜運転と、前記除霜運転の直前に前記設定温度よりも所定値高い室温になるように暖房を行う除霜前運転とを制御する事ができる空気調和機において、前記空気調和機に前回の除霜運転の運転時間を記憶する記憶手段を設け、前記制御装置は前記記憶手段に記憶された前記除霜運転時間が所定運転時間以上だった場合は前記除霜前運転を行い、所定運転時間未満の場合は前記除霜前運転を行わないようにしたことを特徴とする空気調和機。   A refrigeration cycle in which a compressor that compresses the refrigerant, an indoor heat exchanger that is disposed indoors, an expansion valve that decompresses the refrigerant, and an outdoor heat exchanger that is disposed outdoors are annularly connected; A flow path switching means that changes the flow direction of refrigerant, an indoor fan that supplies indoor air to the indoor heat exchanger, an outdoor fan that supplies outdoor air to the outdoor heat exchanger, and the outdoor An outdoor heat exchange sensor that detects the temperature of the heat exchanger, and a control device that controls the operation of the device so that the room temperature becomes a set temperature desired by the user, and the control device drives the compressor to drive the compressor. While performing a heating operation to flow the refrigerant to the indoor heat exchanger and detecting a temperature not higher than the defrosting start temperature by the outdoor heat exchange sensor, the indoor fan and the outdoor fan are stopped, and the flow path switching means Heating luck Air conditioning capable of controlling a defrosting operation in which the refrigerant flows in the opposite direction to the time and a predefrosting operation in which heating is performed so that the room temperature is higher than the set temperature by a predetermined value immediately before the defrosting operation. In the machine, the air conditioner is provided with storage means for storing the operation time of the previous defrosting operation, and when the defrosting operation time stored in the storage means is equal to or longer than a predetermined operation time, the control device An air conditioner characterized in that the operation before defrosting is performed and the operation before defrosting is not performed when the operation time is less than a predetermined operation time. 冷媒を圧縮する圧縮機と、室内に配される室内熱交換器と、冷媒を減圧する膨張弁と、室外に配される室外熱交換器とを環状に接続した冷凍サイクルと、該冷凍サイクル途中に設置され冷媒の流動方向を変更する流路切替手段と、室内の空気を前記室内熱交換器に供給する室内ファンと、室外の空気を前記室外熱交換器に供給する室外ファンと、前記室外熱交換器の温度を検出する室外熱交センサと、室温がユーザーの所望した設定温度になるように機器の運転を制御する制御装置とを備え、前記制御装置は前記圧縮機を駆動させて前記室内熱交換器へ冷媒を流動させる暖房運転を行うと共に、前記室外熱交センサで除霜開始温度以下の温度を検出したら、前記室内ファン及び前記室外ファンを停止させ、前記流路切替手段により前記暖房運転時と逆方向に冷媒を流動させる除霜運転と、前記除霜運転の直前に前記設定温度よりも所定値高い室温になるように暖房を行う除霜前運転とを制御する事ができる空気調和機において、前記空気調和機に前回の除霜運転終了時間を記憶する記憶手段を設け、前記記憶手段に記憶された除霜運転終了時間から次の除霜運転が行われるまでの経過時間が所定経過時間以下である場合は前記除霜前運転を行い、所定経過時間を超えていた場合は前記除霜前運転を行わないようにしたことを特徴とする空気調和機。   A refrigeration cycle in which a compressor that compresses the refrigerant, an indoor heat exchanger that is disposed indoors, an expansion valve that decompresses the refrigerant, and an outdoor heat exchanger that is disposed outdoors are annularly connected; A flow path switching means that changes the flow direction of refrigerant, an indoor fan that supplies indoor air to the indoor heat exchanger, an outdoor fan that supplies outdoor air to the outdoor heat exchanger, and the outdoor An outdoor heat exchange sensor that detects the temperature of the heat exchanger, and a control device that controls the operation of the device so that the room temperature becomes a set temperature desired by the user, and the control device drives the compressor to drive the compressor. While performing a heating operation to flow the refrigerant to the indoor heat exchanger and detecting a temperature not higher than the defrosting start temperature by the outdoor heat exchange sensor, the indoor fan and the outdoor fan are stopped, and the flow path switching means Heating luck Air conditioning capable of controlling a defrosting operation in which the refrigerant flows in the opposite direction to the time and a predefrosting operation in which heating is performed so that the room temperature is higher than the set temperature by a predetermined value immediately before the defrosting operation. A storage means for storing a previous defrosting operation end time in the air conditioner, and an elapsed time from the defrosting operation end time stored in the storage means until the next defrosting operation is performed is predetermined. The air conditioner characterized in that the operation before the defrosting is performed when the elapsed time is less than or equal to the elapsed time, and the operation before the defrosting is not performed when the predetermined elapsed time is exceeded.
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CN107246701A (en) * 2016-09-13 2017-10-13 奥克斯空调股份有限公司 A kind of air conditioner chamber's external heat exchanger defrosting or snow removing control method
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CN109751713A (en) * 2018-12-28 2019-05-14 广东美的暖通设备有限公司 The defrosting control method and storage medium of a kind of air conditioner, air conditioner
CN110285527A (en) * 2019-05-28 2019-09-27 珠海格力电器股份有限公司 Show the method, apparatus and air-conditioning of indoor environment temperature
CN111649452A (en) * 2020-05-20 2020-09-11 宁波奥克斯电气股份有限公司 Air conditioner auxiliary defrosting method, control device, storage medium and air conditioner
JP7443887B2 (en) 2020-03-30 2024-03-06 株式会社富士通ゼネラル air conditioner

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Cited By (11)

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Publication number Priority date Publication date Assignee Title
CN107246701A (en) * 2016-09-13 2017-10-13 奥克斯空调股份有限公司 A kind of air conditioner chamber's external heat exchanger defrosting or snow removing control method
CN107228451A (en) * 2017-05-17 2017-10-03 青岛海尔空调器有限总公司 Air conditioner defrosting control method
CN107270420A (en) * 2017-07-24 2017-10-20 美的集团武汉制冷设备有限公司 The control method of air conditioner, the control device of air conditioner and air conditioner
CN108151231A (en) * 2017-12-25 2018-06-12 广东美的制冷设备有限公司 Defrosting control method, defrosting control device and air conditioner
CN109654678A (en) * 2018-11-13 2019-04-19 青岛海尔空调器有限总公司 Air conditioner defrosting control method
CN109654678B (en) * 2018-11-13 2021-05-25 青岛海尔空调器有限总公司 Defrosting control method for air conditioner
CN109751713A (en) * 2018-12-28 2019-05-14 广东美的暖通设备有限公司 The defrosting control method and storage medium of a kind of air conditioner, air conditioner
CN110285527A (en) * 2019-05-28 2019-09-27 珠海格力电器股份有限公司 Show the method, apparatus and air-conditioning of indoor environment temperature
CN110285527B (en) * 2019-05-28 2020-07-28 珠海格力电器股份有限公司 Method and device for displaying indoor environment temperature and air conditioner
JP7443887B2 (en) 2020-03-30 2024-03-06 株式会社富士通ゼネラル air conditioner
CN111649452A (en) * 2020-05-20 2020-09-11 宁波奥克斯电气股份有限公司 Air conditioner auxiliary defrosting method, control device, storage medium and air conditioner

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