JP4519698B2 - Air conditioning apparatus and air conditioning method - Google Patents

Air conditioning apparatus and air conditioning method Download PDF

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JP4519698B2
JP4519698B2 JP2005097923A JP2005097923A JP4519698B2 JP 4519698 B2 JP4519698 B2 JP 4519698B2 JP 2005097923 A JP2005097923 A JP 2005097923A JP 2005097923 A JP2005097923 A JP 2005097923A JP 4519698 B2 JP4519698 B2 JP 4519698B2
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drain
predetermined time
compressor
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water
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啓司 野浪
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Mitsubishi Electric Corp
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本発明は、空気調和装置のドレン配管のドレントラップに関するものである。   The present invention relates to a drain trap of a drain pipe of an air conditioner.

図９は、従来の空気調和装置の構造を示す図である（例えば、特許文献１参照。）。図９においては、凝縮側熱交換器の下部に備えられ、凝縮側熱交換器で発生した凝縮水を受け止めるドレンパン１３、ドレンパン１３で捕水して集めたドレン水をユニット外部に導水するドレン配管ａ及びドレントラップＡが示されている。通常、ドレントラップＡ内にはドレン水がためられており、空気調和装置の外部と内部の差圧による気流の逆流を防止している。 FIG. 9 is a diagram showing a structure of a conventional air conditioner (see, for example, Patent Document 1). In FIG. 9, a drain pan 13 provided at the lower part of the condensation side heat exchanger and receiving the condensed water generated by the condensation side heat exchanger, and a drain pipe for collecting the drain water collected and collected by the drain pan 13 to the outside of the unit. a and drain trap A are shown. Usually, drain water is stored in the drain trap A, and the backflow of the airflow by the pressure difference between the outside and the inside of the air conditioner is prevented.

特開平０７−０７１７８３号公報（第２図）Japanese Patent Laid-Open No. 07-071783 (FIG. 2)

上記のように構成された従来の空気調和装置では、中間期などの長期停止や、暖房期間及び機械室用途の空調における高顕熱運転時などの、室内機で凝縮水が発生しない状況が長期間続いた場合、ドレントラップ内のドレン水が自然蒸発し枯渇してしまうことがある。この状態で冷房運転を開始すると、室内送風機に起因する吸込み負圧により、室内機外の空気がドレン配管を逆流し、室内機内部に風が吸込まれる。このため、ドレン水がドレン配管に沿って流れず室内機内部に吹出され、室内機内部の構造によっては室内機外への漏水が懸念され、飛散防止板等の構造上の対策が必要となる。   In the conventional air conditioner configured as described above, there is a long-term situation in which condensed water is not generated in the indoor unit such as a long-term stop such as an intermediate period or a high sensible heat operation in a heating period or air conditioning for machine room applications. If it continues, the drain water in the drain trap may spontaneously evaporate and be depleted. When the cooling operation is started in this state, the air outside the indoor unit flows backward through the drain pipe due to the suction negative pressure caused by the indoor blower, and the wind is sucked into the indoor unit. For this reason, drain water does not flow along the drain pipe but is blown out into the indoor unit. Depending on the structure inside the indoor unit, there is a concern of leakage to the outside of the indoor unit, and structural measures such as a splash prevention plate are required. .

本発明は、上記の課題を解決するためになされたものであり、運転中のドレン配管におけるドレントラップ内のドレン水の枯渇を防止し、室内送風機の吸込み負圧によるドレン水の室内機への逆流をなくして室内へ漏水することを防止する空気調和装置及び空気調和方法の提供を目的とする。 The present invention has been made to solve the above-described problems, and prevents drain water in the drain trap in the drain pipe during operation from being discharged, and drain water to the indoor unit due to suction negative pressure of the indoor blower. An object of the present invention is to provide an air conditioning apparatus and an air conditioning method that prevent backflow and prevents leakage into the room.

上記目的を達成するため、本発明に係る空気調和装置は、圧縮機と、室内送風機と、室内熱交換器と、室内熱交換器で発生したドレン水を受けるドレンパンと、ドレントラップを有しドレンパンに集められたドレン水を室内機外へ排出するドレン配管と、ドレントラップ内にドレン水を保持するために前記室内熱交換器で凝縮水が発生しやすいように前記室内送風機の風量及び運転時間を制御する制御部とを備えることを特徴とする。さらに、室内送風機は容量制御可能であり、制御部は、圧縮機の運転中の所定時間間隔毎に、室内送風機を所定容量以下で所定時間運転後、所定時間停止させることを特徴とする。また、圧縮機は容量制御可能であり、制御部は、圧縮機の運転中の所定時間間隔毎に、圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させることを特徴とする。 In order to achieve the above object, an air conditioner according to the present invention includes a compressor, an indoor fan, an indoor heat exchanger, a drain pan that receives drain water generated by the indoor heat exchanger, and a drain pan that includes a drain trap. A drain pipe for draining the collected drain water to the outside of the indoor unit, and an air flow rate and operating time of the indoor fan so that condensate is easily generated in the indoor heat exchanger in order to hold the drain water in the drain trap. And a control unit for controlling. Further, the capacity of the indoor blower can be controlled, and the control unit is characterized in that the indoor blower is operated for a predetermined time at a predetermined capacity or less for a predetermined time and stopped for a predetermined time at every predetermined time interval during operation of the compressor. Further, the capacity of the compressor can be controlled, and the control unit stops the indoor blower for a predetermined time after operating the compressor at a predetermined frequency or more for a predetermined time at every predetermined time interval during operation of the compressor. To do.

さらに、本発明に係る空気調和装置は、ドレントラップ内にドレンセンサを備えることを特徴とする。さらに、室内送風機は容量制御可能であり、制御部は、ドレンセンサによりドレントラップ内が所定水量以下であることを検出した場合、圧縮機の運転中に、室内送風機を所定容量以下で所定時間運転後、所定時間停止させることを特徴とする。また、圧縮機は容量制御可能であり、制御部は、ドレンセンサによりドレントラップ内が所定水量以下であることを検出した場合、圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させることを特徴とする。   Furthermore, the air conditioner according to the present invention includes a drain sensor in the drain trap. Furthermore, the capacity of the indoor fan can be controlled, and when the control unit detects that the drain trap is below a predetermined amount of water by the drain sensor, the indoor fan is operated at a predetermined capacity or less for a predetermined time during operation of the compressor. Then, it is stopped for a predetermined time. In addition, the capacity of the compressor can be controlled, and when the control unit detects that the inside of the drain trap is less than or equal to a predetermined amount of water by the drain sensor, the compressor is operated at a predetermined frequency or more for a predetermined time and then the indoor blower is operated for a predetermined time. It is characterized by stopping.

上記目的を達成するため、本発明に係る空気調和方法は、圧縮機と、室内送風機と、室内熱交換器と、室内熱交換器で発生したドレン水を受けるドレンパンと、ドレントラップを有しドレンパンに集められたドレン水を室内機外へ排出するドレン配管を備える空気調和装置において、ドレントラップ内にドレン水を保持するために前記室内熱交換器で凝縮水が発生しやすいように前記室内送風機の風量及び運転時間を制御する第１制御ステップを含むことを特徴とする。さらに、室内送風機は容量制御可能であり、第１制御ステップは、圧縮機の運転中の所定時間間隔毎に、室内送風機を所定容量以下で所定時間運転後、所定時間停止させるステップを含むことを特徴とする。また、圧縮機は容量制御可能であり、第１制御ステップは、所定時間間隔毎に、圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させるステップを含むことを特徴とする。 In order to achieve the above object, an air conditioning method according to the present invention includes a compressor, an indoor fan, an indoor heat exchanger, a drain pan that receives drain water generated by the indoor heat exchanger, and a drain pan having a drain trap. In the air conditioner having a drain pipe for discharging the drain water collected in the indoor unit to the outside of the indoor unit, the indoor blower so that condensed water is easily generated in the indoor heat exchanger in order to hold the drain water in the drain trap. Including a first control step for controlling the air volume and the operation time . Further, the capacity of the indoor blower can be controlled, and the first control step includes a step of stopping the indoor blower for a predetermined time after being operated at a predetermined capacity or less for a predetermined time at predetermined time intervals during operation of the compressor. Features. Further, the capacity of the compressor can be controlled, and the first control step includes a step of stopping the indoor blower for a predetermined time after the compressor is operated at a predetermined frequency or more for a predetermined time at predetermined time intervals. .

空気調和装置は、ドレントラップ内にドレンセンサを備え、第１制御ステップは、ドレンセンサによるドレントラップ内の水量の検出結果に基づいて運転する第２制御ステップを含むことを特徴とする。さらに、室内送風機は容量制御可能であり、第２制御ステップは、ドレンセンサでドレントラップ内が所定水量以下であることを検出した場合、圧縮機の運転中に、室内送風機を所定容量以下で所定時間運転後、所定時間停止させるステップを含むことを特徴とする。また、圧縮機は容量制御可能であり、第２制御ステップは、ドレンセンサでドレントラップ内が所定水量以下であることを検出した場合、圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させるステップを含むことを特徴とする。   The air conditioner includes a drain sensor in the drain trap, and the first control step includes a second control step of operating based on a detection result of the amount of water in the drain trap by the drain sensor. Further, the capacity of the indoor blower can be controlled, and the second control step determines that the indoor blower is kept below a predetermined capacity during operation of the compressor when the drain sensor detects that the inside of the drain trap is below a predetermined amount of water. The method includes a step of stopping for a predetermined time after the time operation. Further, the capacity of the compressor can be controlled, and in the second control step, when the drain sensor detects that the inside of the drain trap is below a predetermined amount of water, the compressor is operated at a predetermined frequency or more for a predetermined time, and then the indoor blower is turned on. The method includes a step of stopping for a predetermined time.

本発明により、特に電算機室や機械室等を対象とし、対物空調を行いながら連続運転を行う高顕熱運転型の空気調和装置において、運転中のドレン配管におけるドレントラップ内のドレン水の枯渇を防止でき、運転中は常にドレントラップ内にドレン水を保持することができるので、室内送風機の吸込み負圧によるドレン水の室内機への逆流がなくなり、室内へ漏水することを防止できる。さらに、従来技術では必要であったドレントラップ内のドレン水の枯渇時の飛散防止板等の構造部材が不要になる。また、長期の運転停止後の運転起動時等に、ドレントラップの点検等の保守作業を省略することができる。 According to the present invention, in a high sensible heat operation type air conditioner that performs continuous operation while performing objective air conditioning, particularly for computer rooms and machine rooms, etc., drain water in the drain trap in the drain pipe during operation is depleted. Since the drain water can always be held in the drain trap during operation, the backflow of the drain water to the indoor unit due to the suction negative pressure of the indoor blower is eliminated, and leakage into the room can be prevented. Furthermore, a structural member such as a splash prevention plate when drain water in the drain trap is exhausted, which is necessary in the prior art, is not necessary. In addition, maintenance work such as inspection of the drain trap can be omitted at the start of operation after a long-term shutdown.

圧縮機の運転中の所定時間間隔毎に、室内送風機を所定容量以下で所定時間運転後、所定時間停止させる、又は、圧縮機の運転中の所定時間間隔毎に、圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させることにより、定期的に室内熱交換器の蒸発温度が低い状態で運転を行うこととなり、凝縮したドレン水を確実に発生させることができる。 After every predetermined time interval during operation of the compressor, the indoor blower is operated for a predetermined time at a predetermined capacity or less and then stopped for a predetermined time, or at every predetermined time interval during operation of the compressor, the compressor is operated at a predetermined frequency or more. By stopping the indoor blower for a predetermined time after the operation for a predetermined time, the operation is periodically performed in a state where the evaporation temperature of the indoor heat exchanger is low, and condensed drain water can be reliably generated.

また、ドレン配管におけるドレントラップ内のドレン水量を検出するドレンセンサを備えることにより、ドレン水量の検出結果から、ドレン水が所定量よりも少なくなった状況を的確に検出することができる。 Further, by providing a drain sensor that detects the amount of drain water in the drain trap in the drain pipe, it is possible to accurately detect a situation in which the drain water is less than the predetermined amount from the detection result of the drain water amount.

ドレンセンサによりドレントラップ内が所定水量以下であることを検出した場合、圧縮機の運転中に、室内送風機を所定容量以下で所定時間運転後、所定時間停止させる、又は、圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させることにより、ドレン水が所定水量よりも少ないときにのみ圧縮機や室内送風機等による冷媒回路の運転を強制的に変化させる運転を行って、ドレン水を発生させ、ドレン水をドレントラップ内に保持できるので、より安定した運転を連続することが可能となる。 When it is detected by the drain sensor that the inside of the drain trap is below a predetermined amount of water, during operation of the compressor, the indoor blower is operated for a predetermined time at a predetermined capacity or less and then stopped for a predetermined time, or the compressor is operated at a predetermined frequency or more. After the operation for a predetermined time, the indoor blower is stopped for a predetermined time, so that the operation of forcibly changing the operation of the refrigerant circuit by the compressor or the indoor blower is performed only when the drain water is less than the predetermined amount of water. Since water is generated and drain water can be retained in the drain trap, more stable operation can be continued.

以下、本発明の実施の形態に係る空気調和装置及びその方法について図面を参照しながら説明を行う。
実施の形態１．
図１は、本発明の実施の形態１に係る空気調和装置の構造を示す図である。図１に示すように、空気調和装置１０は、蒸発側熱交換器１、蒸発側熱交換器の風路二次側に配置された室内送風機２、蒸発側熱交換器１の下部に備えられたドレンパン３、ドレンパン３で捕水したドレン水をユニット外部に導水するドレン配管４（ドレントラップ５を有している。）、インバータ圧縮機６及び室内送風機２とインバータ圧縮機６とを制御する制御部７及び外郭８を備えている。 Hereinafter, an air-conditioning apparatus and method according to an embodiment of the present invention will be described with reference to the drawings.
Embodiment 1 FIG.
1 is a diagram showing a structure of an air-conditioning apparatus according to Embodiment 1 of the present invention. As shown in FIG. 1, the air conditioner 10 is provided at the lower part of the evaporation side heat exchanger 1, the indoor blower 2 disposed on the air path secondary side of the evaporation side heat exchanger, and the evaporation side heat exchanger 1. The drain pan 3, the drain pipe 4 (having a drain trap 5) that guides drain water captured by the drain pan 3 to the outside of the unit, the inverter compressor 6, the indoor blower 2, and the inverter compressor 6 are controlled. A control unit 7 and an outer shell 8 are provided.

図２は、本発明の実施の形態１に係る空気調和装置の制御ブロック図を示す図である。空気調和装置１０において、制御部７はインバータ圧縮機６の周波数及び室内送風機２の風量の制御等を行っている。 FIG. 2 is a control block diagram of the air-conditioning apparatus according to Embodiment 1 of the present invention. In the air conditioner 10, the control unit 7 controls the frequency of the inverter compressor 6 and the air volume of the indoor fan 2.

次に、上記のように構成された空気調和装置１０の動作について説明する。
図３は、本発明の実施の形態１に係る空気調和装置の運転タイムチャートの一例を示す図である。制御部７は、空気調和装置１０の運転時間が一定時間Ｔ１（例えば１週間）をカウントした場合、室内送風機２を最低風量ＬＬで運転をする。この運転により冷媒回路に関して蒸発側熱交換器１の蒸発温度が低い状態で運転が行われることとなり、凝縮水が発生し易い状態となる。これにより、蒸発側熱交換器１で発生した凝縮水はドレンパン３に流れ落ちる。 Next, operation | movement of the air conditioning apparatus 10 comprised as mentioned above is demonstrated.
FIG. 3 is a diagram illustrating an example of an operation time chart of the air-conditioning apparatus according to Embodiment 1 of the present invention. When the operation time of the air conditioner 10 counts a certain time T1 (for example, one week), the control unit 7 operates the indoor blower 2 with the minimum air volume LL. By this operation, the operation is performed in a state where the evaporation temperature of the evaporation side heat exchanger 1 is low with respect to the refrigerant circuit, and the condensed water is easily generated. Thereby, the condensed water generated in the evaporation side heat exchanger 1 flows down to the drain pan 3.

次に、制御部７は、一定時間Ｔ２（例えば５分間）上記の室内送風機２が最低風量ＬＬの運転を行った後、室内送風機２の運転を数秒間Ｔ３（例えば１０秒）停止する。これにより、ドレンパン３にたまっていた凝縮水はドレンパン３の排水口からドレン配管４に流れ込み、ドレントラップ５を封止する。その後、制御部７は、室内送風機２及びインバータ圧縮機６について通常の運転制御に戻り、再び空気調和装置１０の運転時間が一定時間Ｔ１（例えば１週間）をカウントした場合、上記制御動作を繰り返す。 Next, the control unit 7 stops the operation of the indoor blower 2 for several seconds T3 (for example, 10 seconds) after the indoor blower 2 performs the operation of the minimum air volume LL for a certain time T2 (for example, 5 minutes). Thereby, the condensed water accumulated in the drain pan 3 flows from the drain port of the drain pan 3 into the drain pipe 4 and seals the drain trap 5. Thereafter, the control unit 7 returns to normal operation control for the indoor blower 2 and the inverter compressor 6, and repeats the control operation when the operation time of the air conditioner 10 again counts a certain time T1 (for example, one week). .

図４は、本発明の実施の形態１に係る空気調和装置の運転タイムチャートの他の一例を示す図である。制御部７は、空気調和装置１０の運転時間が一定時間Ｔ４（例えば１週間）をカウントした場合、インバータ圧縮機６を最大周波数で運転を行う。これにより冷媒回路に関して、蒸発側熱交換器１の蒸発温度が低い状態で運転が行われることとなり、凝縮水が発生し易い状態となる。発生した凝縮水はドレンパン３に流れ落ちる。 FIG. 4 is a diagram showing another example of an operation time chart of the air-conditioning apparatus according to Embodiment 1 of the present invention. The control unit 7 operates the inverter compressor 6 at the maximum frequency when the operation time of the air conditioner 10 counts a certain time T4 (for example, one week). As a result, the refrigerant circuit is operated in a state where the evaporation temperature of the evaporation side heat exchanger 1 is low, and the condensed water is easily generated. The generated condensed water flows down to the drain pan 3.

次に、制御部７は、一定時間Ｔ５（例えば５分間）上記のインバータ圧縮機６の最大周波数での運転を行った後、室内送風機２の運転を数秒間Ｔ６（例えば１０秒）停止する。これにより、ドレンパン３にたまっていた凝縮水はドレンパン３の排水口からドレン配管４に流れ込み、ドレントラップ５を封止する。その後、制御部７は室内送風機２及びインバータ圧縮機６について通常の運転制御に戻り、再び空気調和装置１０の運転時間が一定時間Ｔ４（例えば１週間）をカウントした場合、上記制御動作を繰り返す。 Next, the control unit 7 performs the operation at the maximum frequency of the inverter compressor 6 for a certain time T5 (for example, 5 minutes), and then stops the operation of the indoor blower 2 for several seconds T6 (for example, 10 seconds). Thereby, the condensed water accumulated in the drain pan 3 flows from the drain port of the drain pan 3 into the drain pipe 4 and seals the drain trap 5. Thereafter, the control unit 7 returns to normal operation control for the indoor blower 2 and the inverter compressor 6, and repeats the above control operation when the operation time of the air conditioner 10 again counts a certain time T4 (for example, one week).

以上説明を行ったように、制御部７による運転制御により、連続運転を行う電算機室などの機械室用途の空気調和装置について、従来では高顕熱運転によりドレン水が発生しない状態が続いてドレントラップ５の水が枯渇する可能性がある場合であっても、確実にドレントラップ５にドレン水をためることが可能となる。これにより、室内送風機２の吸込み負圧によるドレン水の室内機への逆流がなくなり、室内へ漏水することを防止できる。従って、ドレン水枯渇時の飛散防止板等の構造部材が不要になり、ドレントラップ５のドレン水枯渇によるドレン水の逆流を防止し、室内への漏水に対しての安全性を確保でき、ドレントラップ５の点検等の保守作業を省略できる。   As described above, in the air conditioner for machine room such as a computer room that performs continuous operation by the operation control by the control unit 7, conventionally, the state in which no drain water is generated by the high sensible heat operation continues. Even when there is a possibility that the water in the trap 5 may be depleted, the drain water can be reliably accumulated in the drain trap 5. Thereby, the backflow to the indoor unit of drain water by the suction negative pressure of the indoor blower 2 is eliminated, and it is possible to prevent water from leaking into the room. Accordingly, there is no need for a structural member such as a splash prevention plate when drain water is exhausted, it is possible to prevent drain water from flowing backward due to drain water exhaustion of the drain trap 5, and to ensure safety against leakage in the room. Maintenance work such as inspection of the trap 5 can be omitted.

実施の形態２．
以下、本発明の実施の形態２に係る空気調和装置及びその方法について説明する。
図５は、 本発明の実施の形態２に係る空気調和装置におけるドレントラップ内のドレンセンサの取り付けの一例を示す図である。図５においては、空気調和装置１１は、ドレンパン３、ドレンパン３で捕水したドレン水をユニット外部に導水するドレン配管４（ドレントラップ５を有している。）及びドレントラップ５内に配置され、ドレントラップ５内の水量を検出するためのドレンセンサ９が示されている。他の構成は、実施の形態１と同様である。 Embodiment 2. FIG.
Hereinafter, the air conditioning apparatus and method according to Embodiment 2 of the present invention will be described.
FIG. 5 is a diagram illustrating an example of attachment of the drain sensor in the drain trap in the air-conditioning apparatus according to Embodiment 2 of the present invention. In FIG. 5, the air conditioner 11 is disposed in the drain pan 3, a drain pipe 4 (having a drain trap 5) that guides drain water captured by the drain pan 3 to the outside of the unit, and the drain trap 5. A drain sensor 9 for detecting the amount of water in the drain trap 5 is shown. Other configurations are the same as those in the first embodiment.

図６は、本発明の実施の形態２に係る空気調和装置の制御ブロック図を示す図である。空気調和装置１１において、制御部１７は、ドレンセンサ９によるドレントラップ５内の水量の検出結果に基づいてインバータ圧縮機６の周波数及び室内送風機２の風量の制御等を行っている。 FIG. 6 is a control block diagram of the air-conditioning apparatus according to Embodiment 2 of the present invention. In the air conditioner 11, the control unit 17 controls the frequency of the inverter compressor 6 and the air volume of the indoor blower 2 based on the detection result of the amount of water in the drain trap 5 by the drain sensor 9.

上記のように構成された空気調和装置１１の動作について説明する。図７は、本発明の実施の形態２に係る空気調和装置の運転タイムチャートの一例を示す図である。 Operation | movement of the air conditioning apparatus 11 comprised as mentioned above is demonstrated. FIG. 7 is a diagram illustrating an example of an operation time chart of the air-conditioning apparatus according to Embodiment 2 of the present invention.

制御部１７は、空気調和装置１１の冷房運転中にドレンセンサ９がドレントラップ５内に水が無いことを検出した場合、室内送風機２を最低風量ＬＬで運転をする。これにより冷媒回路において、蒸発側熱交換器１の蒸発温度が低い状態で運転が行われることとなり、凝縮水が発生し易い状態となり、発生した凝縮水はドレンパン３上に流れ落ちる。 When the drain sensor 9 detects that there is no water in the drain trap 5 during the cooling operation of the air conditioner 11, the controller 17 operates the indoor blower 2 with the minimum air volume LL. Thereby, in the refrigerant circuit, the operation is performed in a state where the evaporation temperature of the evaporation side heat exchanger 1 is low, and the condensed water is easily generated, and the generated condensed water flows down on the drain pan 3.

一定時間Ｔ７（例えば５分間）上記の室内送風機２の最低風量ＬＬでの運転を行った後、制御部１７は室内送風機２の運転を数秒間Ｔ８（例えば１０秒）停止する。これにより、ドレンパン３にたまっていたドレン水はドレンパン３の排水口からドレン配管４に流れ込み、ドレントラップ５を封止する。その後、制御部１７は室内送風機２およびインバータ圧縮機６について通常の運転制御に戻り、再びドレンセンサ９がドレントラップ５内に水が無いことを検出した場合、上記制御動作を繰り返す。 After the operation at the minimum air volume LL of the indoor blower 2 described above is performed for a certain time T7 (for example, 5 minutes), the control unit 17 stops the operation of the indoor blower 2 for several seconds T8 (for example, 10 seconds). As a result, the drain water accumulated in the drain pan 3 flows into the drain pipe 4 from the drain port of the drain pan 3 and seals the drain trap 5. Thereafter, the control unit 17 returns to normal operation control for the indoor blower 2 and the inverter compressor 6, and repeats the above control operation when the drain sensor 9 detects again that there is no water in the drain trap 5.

図８は、本発明の実施の形態２に係る空気調和装置の運転タイムチャートの他の一例を示す図である。制御部１７は、空気調和装置１１の冷房運転中にドレンセンサ９がドレントラップ５内に水が無いことを検出した場合、インバータ圧縮機６を最大周波数で運転をする。これにより冷媒回路において、蒸発側熱交換器１の蒸発温度が低い状態で運転が行われることとなり、凝縮水が発生し易い状態となり、発生した凝縮水はドレンパン３上に流れ落ちる。 FIG. 8 is a diagram illustrating another example of an operation time chart of the air-conditioning apparatus according to Embodiment 2 of the present invention. When the drain sensor 9 detects that there is no water in the drain trap 5 during the cooling operation of the air conditioner 11, the control unit 17 operates the inverter compressor 6 at the maximum frequency. Thereby, in the refrigerant circuit, the operation is performed in a state where the evaporation temperature of the evaporation side heat exchanger 1 is low, and the condensed water is easily generated, and the generated condensed water flows down on the drain pan 3.

制御部１７は、一定時間Ｔ９（例えば５分間）上記のインバータ圧縮機６の最大周波数での運転を行った後、室内送風機２の運転を数秒間Ｔ１０（例えば１０秒）停止する。これにより、ドレンパン３にたまっていたドレン水はドレンパン３の排水口からドレン配管４に流れ込み、ドレントラップ５を封止する。その後、制御部１７は室内送風機２およびインバータ圧縮機６について通常の運転制御に戻り、再びドレンセンサ９がドレントラップ５内に水が無いことを検出した場合、上記制御動作を繰り返す。 The controller 17 stops the operation of the indoor blower 2 for several seconds T10 (for example, 10 seconds) after performing the operation at the maximum frequency of the inverter compressor 6 for a certain time T9 (for example, 5 minutes). As a result, the drain water accumulated in the drain pan 3 flows into the drain pipe 4 from the drain port of the drain pan 3 and seals the drain trap 5. Thereafter, the control unit 17 returns to normal operation control for the indoor blower 2 and the inverter compressor 6, and repeats the above control operation when the drain sensor 9 detects again that there is no water in the drain trap 5.

以上の説明からわかるように、本実施の形態２に係る空気調和装置１１では、ドレントラップ５内のドレンセンサ９の水量の検出結果に基づいて、ドレントラップ５内にドレン水が無い場合のみ、インバータ圧縮機６の周波数又は室内送風機２の風量による冷媒回路の運転制御を強制的に変化させるので、より安定した運転を連続することが可能である。 As can be seen from the above description, in the air conditioner 11 according to the second embodiment, based on the detection result of the water amount of the drain sensor 9 in the drain trap 5, only when there is no drain water in the drain trap 5, Since the operation control of the refrigerant circuit according to the frequency of the inverter compressor 6 or the air volume of the indoor blower 2 is forcibly changed, more stable operation can be continued.

本発明に係る空気調和装置及び空気調和方法は、例えば主に機械室用途などに使用される高顕熱運転型の空気調和装置に適用できる。 The air conditioning apparatus and the air conditioning method according to the present invention can be applied to, for example, a high sensible heat operation type air conditioning apparatus mainly used for machine room applications.

本発明の実施の形態１に係る空気調和装置の構造を示す図である。It is a figure which shows the structure of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置の制御ブロック図を示す図である。It is a figure which shows the control block diagram of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置の運転タイムチャートの一例を示す図である。It is a figure which shows an example of the operation | movement time chart of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態１に係る空気調和装置の運転タイムチャートの一例を示す図である。It is a figure which shows an example of the operation | movement time chart of the air conditioning apparatus which concerns on Embodiment 1 of this invention. 本発明の実施の形態２に係る空気調和装置におけるドレントラップ内のドレンセンサの取り付けの一例を示す図である。It is a figure which shows an example of attachment of the drain sensor in the drain trap in the air conditioning apparatus which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る空気調和装置の制御ブロック図を示す図である。It is a figure which shows the control block diagram of the air conditioning apparatus which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る空気調和装置の運転タイムチャートの一例を示す図である。It is a figure which shows an example of the operation time chart of the air conditioning apparatus which concerns on Embodiment 2 of this invention. 本発明の実施の形態２に係る空気調和装置の運転タイムチャートの一例を示す図である。It is a figure which shows an example of the operation time chart of the air conditioning apparatus which concerns on Embodiment 2 of this invention. 従来の空気調和装置の構造を示す図である。It is a figure which shows the structure of the conventional air conditioning apparatus.

符号の説明Explanation of symbols

１ 蒸発側熱交換器（室内熱交換器）、２ 容量制御可能な室内送風機、３ ドレンパン、４ ドレン配管、５ ドレントラップ、６ インバータ圧縮機、７ 制御部、８ 外郭、９ ドレンセンサ、１０ 空気調和装置、１１ 空気調和装置、１７ 制御部。 1 Evaporation side heat exchanger (indoor heat exchanger), 2 capacity controllable indoor blower, 3 drain pan, 4 drain piping, 5 drain trap, 6 inverter compressor, 7 control unit, 8 outer shell, 9 drain sensor, 10 air Harmonic device, 11 Air conditioning device, 17 Control unit.

Claims (12)

圧縮機と、室内送風機と、室内熱交換器と、
前記室内熱交換器で発生したドレン水を受けるドレンパンと、
ドレントラップを有し前記ドレンパンに集められた前記ドレン水を室内機外へ排出するドレン配管と、
前記ドレントラップ内に前記ドレン水を保持するために前記室内熱交換器で凝縮水が発生しやすいように前記室内送風機の風量及び運転時間を制御する制御部とを備えることを特徴とする空気調和装置。 A compressor, an indoor fan, an indoor heat exchanger,
A drain pan for receiving drain water generated in the indoor heat exchanger;
A drain pipe that has a drain trap and discharges the drain water collected in the drain pan to the outside of the indoor unit;
An air conditioner comprising: a controller that controls an air volume and an operation time of the indoor fan so that condensed water is easily generated in the indoor heat exchanger in order to hold the drain water in the drain trap. apparatus. 室内送風機は容量制御可能であり、
制御部は、圧縮機の運転中の所定時間間隔毎に、前記室内送風機を所定容量以下で所定時間運転後、所定時間停止させることを特徴とする請求項１記載の空気調和装置。 The capacity of the indoor fan can be controlled,
2. The air conditioner according to claim 1, wherein the control unit stops the indoor blower for a predetermined time after operating the indoor blower at a predetermined capacity or less for a predetermined time at predetermined time intervals during operation of the compressor. 圧縮機は容量制御可能であり、
制御部は、前記圧縮機の運転中の所定時間間隔毎に、前記圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させることを特徴とする請求項１記載の空気調和装置。 The capacity of the compressor can be controlled,
2. The air conditioner according to claim 1, wherein the control unit stops the indoor blower for a predetermined time after the compressor is operated at a predetermined frequency or more for a predetermined time at predetermined time intervals during operation of the compressor. . ドレントラップ内にドレンセンサを備えることを特徴とする請求項１記載の空気調和装置。   The air conditioner according to claim 1, further comprising a drain sensor in the drain trap. 室内送風機は容量制御可能であり、
制御部は、ドレンセンサによりドレントラップ内が所定水量以下であることを検出した場合、圧縮機の運転中に、前記室内送風機を所定容量以下で所定時間運転後、所定時間停止させることを特徴とする請求項４記載の空気調和装置。 The capacity of the indoor fan can be controlled,
When the control unit detects that the inside of the drain trap is equal to or less than a predetermined amount of water by the drain sensor, the controller is configured to stop the indoor blower for a predetermined time after being operated for a predetermined time at a predetermined capacity or less during operation of the compressor. The air conditioning apparatus according to claim 4. 圧縮機は容量制御可能であり、
制御部は、ドレンセンサによりドレントラップ内が所定水量以下であることを検出した場合、前記圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させることを特徴とする請求項４記載の空気調和装置。 The capacity of the compressor can be controlled,
The control unit, when detecting that the inside of the drain trap is less than or equal to a predetermined amount of water by the drain sensor, operates the compressor at a predetermined frequency or more for a predetermined time and then stops the indoor blower for a predetermined time. The air conditioning apparatus described. 圧縮機と、室内送風機と、室内熱交換器と、前記室内熱交換器で発生したドレン水を受けるドレンパンと、ドレントラップを有し前記ドレンパンに集められた前記ドレン水を室内機外へ排出するドレン配管を備える空気調和装置において、
前記ドレントラップ内に前記ドレン水を保持するために前記室内熱交換器で凝縮水が発生しやすいように前記室内送風機の風量及び運転時間を制御する第１制御ステップを含むことを特徴とする空気調和方法。 A compressor, an indoor fan, an indoor heat exchanger, a drain pan that receives drain water generated in the indoor heat exchanger, and a drain trap that collects the drain water collected in the drain pan to the outside of the indoor unit. In an air conditioner equipped with a drain pipe,
An air comprising a first control step of controlling an air volume and an operation time of the indoor blower so that condensed water is easily generated in the indoor heat exchanger in order to hold the drain water in the drain trap. Harmony method. 室内送風機は容量制御可能であり、
第１制御ステップは、圧縮機の運転中の所定時間間隔毎に、前記室内送風機を所定容量以下で所定時間運転後、所定時間停止させるステップを含むことを特徴とする請求項７記載の空気調和方法。 The capacity of the indoor fan can be controlled,
The air conditioning according to claim 7, wherein the first control step includes a step of stopping the indoor blower for a predetermined time after being operated at a predetermined capacity or less for a predetermined time at predetermined time intervals during operation of the compressor. Method. 圧縮機は容量制御可能であり、
第１制御ステップは、所定時間間隔毎に、前記圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させるステップを含むことを特徴とする請求項７記載の空気調和方法。 The capacity of the compressor can be controlled,
8. The air conditioning method according to claim 7, wherein the first control step includes a step of stopping the indoor blower for a predetermined time after the compressor is operated at a predetermined frequency or more for a predetermined time at predetermined time intervals. 空気調和装置は、ドレントラップ内にドレンセンサを備え、
第１制御ステップは、前記ドレンセンサによる前記ドレントラップ内の水量の検出結果に基づいて運転する第２制御ステップを含むことを特徴とする請求項７記載の空気調和方法。 The air conditioner includes a drain sensor in the drain trap,
The air conditioning method according to claim 7, wherein the first control step includes a second control step of operating based on a detection result of the amount of water in the drain trap by the drain sensor. 室内送風機は容量制御可能であり、
第２制御ステップは、ドレンセンサでドレントラップ内が所定水量以下であることを検出した場合、圧縮機の運転中に、前記室内送風機を所定容量以下で所定時間運転後、所定時間停止させるステップを含むことを特徴とする請求項１０記載の空気調和方法。 The capacity of the indoor fan can be controlled,
In the second control step, when the drain sensor detects that the inside of the drain trap is equal to or less than a predetermined amount of water, a step of stopping the indoor blower for a predetermined time after being operated for a predetermined time at a predetermined capacity or less during operation of the compressor. The air conditioning method according to claim 10, further comprising: 圧縮機は容量制御可能であり、
第２制御ステップは、ドレンセンサでドレントラップ内が所定水量以下であることを検出した場合、前記圧縮機を所定周波数以上で所定時間運転後、室内送風機を所定時間停止させるステップを含むことを特徴とする請求項１０記載の空気調和方法。 The capacity of the compressor can be controlled,
The second control step includes a step of stopping the indoor blower for a predetermined time after operating the compressor at a predetermined frequency or higher for a predetermined time when the drain sensor detects that the inside of the drain trap is equal to or lower than the predetermined water amount. The air conditioning method according to claim 10.
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JP2002370518A (en) * 2001-06-13 2002-12-24 Sanyo Electric Co Ltd Air-conditioning unit for trunk room, and conveying truck
JP2004360442A (en) * 2003-05-13 2004-12-24 Noriatsu Kojima Sealing water supplying method for drain trap, flow passage opening/closing device and sealing water supplying device for drain trap used for the method

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