JP2011163675A - Air conditioner - Google Patents

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JP2011163675A
JP2011163675A JP2010027763A JP2010027763A JP2011163675A JP 2011163675 A JP2011163675 A JP 2011163675A JP 2010027763 A JP2010027763 A JP 2010027763A JP 2010027763 A JP2010027763 A JP 2010027763A JP 2011163675 A JP2011163675 A JP 2011163675A
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outdoor unit
compressor
indoor unit
temperature
control circuit
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Yoshihito Ono
嘉仁 大野
Takamitsu Aoki
孝充 青木
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Mitsubishi Electric Corp
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Mitsubishi Electric Corp
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Abstract

<P>PROBLEM TO BE SOLVED: To provide an air conditioner capable of eliminating electric power consumption in an outdoor unit and elongating the service life of components in each circuit of the outdoor unit. <P>SOLUTION: A control circuit 23 of the outdoor unit 2 determines whether or not a compressor stop condition is achieved based on an operation mode received from an indoor unit 1 and temperature information. When the compressor stop condition is achieved, the control circuit 23 stops a compressor 25 and transmits compressor stop information from a communication circuit 24 to the indoor unit 1. A control circuit 14 of the indoor unit 1 turns off a relay switch 13 to shut off connection between a commercial power source 5 and the outdoor unit 2 when the compressor stop information is received. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、空気調和機の制御に関するものである。   The present invention relates to control of an air conditioner.

従来、室内機と室外機とが停止状態にある場合、室外機への給電を完全に遮断しているが、室内機と室外機とが共に運転状態で、室外機の圧縮機が停止状態となった場合でも、室外機から室内機に圧縮機復帰信号を送信できるように室外機への給電は行われたままとなっている（例えば、特許文献１参照）。   Conventionally, when the indoor unit and the outdoor unit are in a stopped state, power supply to the outdoor unit is completely cut off, but both the indoor unit and the outdoor unit are in an operating state, and the compressor of the outdoor unit is in a stopped state. Even in such a case, power is still supplied to the outdoor unit so that a compressor return signal can be transmitted from the outdoor unit to the indoor unit (see, for example, Patent Document 1).

特開平１−３０６７５７号公報（第３頁、図１）JP-A-1-306757 (page 3, FIG. 1)

前述した従来の空気調和機では、圧縮機が停止状態であっても室外機への給電は行われたままとなっているため、室外機の電源回路、制御回路、通信回路などにより電力が消費されており、電源印加による各回路の部品が劣化するという課題があった。
本発明は、前記のような課題を解決するためになされたもので、室外機における電力消費を無くし、また、室外機の各回路の部品の長寿命化を図ることのできる空気調和機を得ることを目的とする。 In the conventional air conditioner described above, power is still supplied to the outdoor unit even when the compressor is stopped, so power is consumed by the power supply circuit, control circuit, communication circuit, etc. of the outdoor unit. Therefore, there is a problem that the components of each circuit are deteriorated by the application of power.
The present invention has been made to solve the above-described problems, and obtains an air conditioner that eliminates power consumption in an outdoor unit and can extend the life of components of each circuit of the outdoor unit. For the purpose.

本発明に係る空気調和機は、外部電源と接続され、室内の温度を検出する温度センサーを有し、現在設定されている運転モードと温度センサーにより検出された温度を送信する室内機と、室内機に電源線を介して接続され、圧縮機を有し、室内機からの運転モードと温度に基づいて圧縮機を制御する室外機と、室内機に設けられ、外部電源から電源線を介して室外機に供給される電力を入り切りするための開閉手段とを備え、室外機は、室内機から受信した運転モードと温度を基に圧縮機停止条件であるか否かを判定し、圧縮機停止条件であったときには圧縮機を停止すると共に、室内機へ圧縮機停止情報を送信し、室内機は、圧縮機停止情報が受信されたときに開閉手段を制御して外部電源と室外機との接続を遮断する。   An air conditioner according to the present invention includes a temperature sensor that is connected to an external power source and detects an indoor temperature, transmits an operation mode that is currently set and the temperature detected by the temperature sensor, An outdoor unit that is connected to the machine via a power line, has a compressor, and controls the compressor based on the operation mode and temperature from the indoor unit, and is provided in the indoor unit, from an external power source via the power line Open / close means for turning on and off the electric power supplied to the outdoor unit, and the outdoor unit determines whether or not the compressor is stopped based on the operation mode and temperature received from the indoor unit, and the compressor stops. When the condition is met, the compressor is stopped and the compressor stop information is transmitted to the indoor unit. When the compressor stop information is received, the indoor unit controls the open / close means to switch between the external power source and the outdoor unit. Disconnect the connection.

本発明によれば、室外機は、室内機から受信した運転モードと温度を基に圧縮機停止条件であるか否かを判定し、圧縮機停止条件であったときには圧縮機を停止すると共に、室内機へ圧縮機停止情報を送信する。一方、室内機は、圧縮機停止情報が受信されたときに開閉手段を制御して外部電源と室外機との接続を遮断する。これにより、室外機への電力供給は完全に遮断され、このため、消費電力を抑えることができ、さらに、室外機の通電時間が短くなることによって室外機の部品の長寿命化を図ることができる。   According to the present invention, the outdoor unit determines whether or not the compressor stop condition is based on the operation mode and temperature received from the indoor unit, and stops the compressor when the compressor stop condition, Compressor stop information is transmitted to the indoor unit. On the other hand, when the compressor stop information is received, the indoor unit controls the opening / closing means to disconnect the connection between the external power source and the outdoor unit. As a result, the power supply to the outdoor unit is completely cut off, so that power consumption can be suppressed, and the life of the outdoor unit can be extended by shortening the energization time of the outdoor unit. it can.

実施の形態に係る空気調和機の回路構成を示すブロック図である。It is a block diagram which shows the circuit structure of the air conditioner which concerns on embodiment. 図１に示す室内機の動作を示すフローチャートである。It is a flowchart which shows operation | movement of the indoor unit shown in FIG. 図１に示す室外機の動作を示すフローチャートである。It is a flowchart which shows operation | movement of the outdoor unit shown in FIG. 実施の形態における圧縮機停止条件および圧縮機復帰条件の内容を運転モードに応じて示す図である。It is a figure which shows the content of the compressor stop condition and compressor return condition in embodiment according to an operation mode.

図１は実施の形態に係る空気調和機の回路構成を示すブロック図である。
図１において、空気調和機は、建物の室内に設置される室内機１と、建物の屋外に設置される室外機２とで構成される。室内機１と室外機２は、それぞれに設けられた室内機端子台１１と室外機端子台２１に接続された電源線３および通信線４により電気的に繋がっている。 FIG. 1 is a block diagram showing a circuit configuration of an air conditioner according to an embodiment.
In FIG. 1, the air conditioner includes an indoor unit 1 installed in a building room and an outdoor unit 2 installed outside the building. The indoor unit 1 and the outdoor unit 2 are electrically connected by the power supply line 3 and the communication line 4 connected to the indoor unit terminal block 11 and the outdoor unit terminal block 21 provided respectively.

室内機１は、外部電源である商用電源５と接続される電源回路１２と、室内機端子台１１と電源回路１２との間の電源線３の一方の線に挿入された開閉手段である例えばリレースイッチ１３と、室内機１を制御する制御回路１４と、室内の温度を検出し温度情報として制御回路１４に送る温度センサー１５と、空気調和機の使用者によってリモコンから送られたリモコン信号を受信し制御回路１２に送るリモコン信号受信部１６と、室外機２とで双方向通信を行う通信回路１７とを備えている。なお、開閉手段としてリレースイッチ１３を用いたことを述べたが、これに代えてフォトトライアックカプラを用いても良い。   The indoor unit 1 is a power supply circuit 12 connected to a commercial power supply 5 that is an external power supply, and an opening / closing means inserted into one line of the power supply line 3 between the indoor unit terminal block 11 and the power supply circuit 12. The relay switch 13, the control circuit 14 for controlling the indoor unit 1, the temperature sensor 15 for detecting the temperature in the room and sending it to the control circuit 14 as temperature information, and the remote control signal sent from the remote control by the user of the air conditioner A remote control signal receiving unit 16 that receives and sends to the control circuit 12 and a communication circuit 17 that performs bidirectional communication with the outdoor unit 2 are provided. Although it has been described that the relay switch 13 is used as the opening / closing means, a phototriac coupler may be used instead.

室内機１の制御回路１４は、現在設定されている運転モードと温度センサー１５により検出された室内の温度情報を送信する。運転モードと温度情報は、所定時間毎に送信される。また、前述の制御回路１４は、後述する圧縮機停止情報が受信されたときにはリレースイッチ１３をオフして商用電源５と室外機２との接続を遮断する。また、制御回路１４は、商用電源５と室外機２との接続を遮断したときには、温度センサー１５により検出された温度情報を基に圧縮機復帰条件を満たしたか否かを判定し、温度情報から圧縮機復帰条件を満たしていると判定したときにはリレースイッチ１３をオンして商用電源５の電力が電源線３を介して室外機２に供給されるようにする。   The control circuit 14 of the indoor unit 1 transmits the currently set operation mode and the indoor temperature information detected by the temperature sensor 15. The operation mode and temperature information are transmitted every predetermined time. Further, the control circuit 14 described above turns off the relay switch 13 to disconnect the commercial power supply 5 from the outdoor unit 2 when compressor stop information described later is received. In addition, when the connection between the commercial power source 5 and the outdoor unit 2 is cut off, the control circuit 14 determines whether or not the compressor return condition is satisfied based on the temperature information detected by the temperature sensor 15, and from the temperature information When it is determined that the compressor return condition is satisfied, the relay switch 13 is turned on so that the power of the commercial power supply 5 is supplied to the outdoor unit 2 via the power line 3.

室外機２は、室内機１に接続された商用電源５からリレースイッチ１３、電源線３を経由して電力を受け取る電源回路２２と、室外機２を制御する制御回路２３と、制御回路２３によって制御される圧縮機２５と、室内機１とで双方向通信を行う通信回路２４とを備えている。室外機２の制御回路２３は、室内機１から受信した運転モードと温度情報を基に圧縮機停止条件であるか否かを判定し、圧縮機停止条件であったときには圧縮機２５を停止すると共に、室内機１へ圧縮機停止情報を送信する。   The outdoor unit 2 includes a power circuit 22 that receives power from the commercial power source 5 connected to the indoor unit 1 via the relay switch 13 and the power line 3, a control circuit 23 that controls the outdoor unit 2, and a control circuit 23. A compressor 25 to be controlled and a communication circuit 24 that performs bidirectional communication with the indoor unit 1 are provided. The control circuit 23 of the outdoor unit 2 determines whether or not it is a compressor stop condition based on the operation mode and temperature information received from the indoor unit 1, and stops the compressor 25 when the compressor stop condition is satisfied. At the same time, the compressor stop information is transmitted to the indoor unit 1.

次に、実施の形態に係る空気調和機の動作について図２乃至図４を用いて説明する。図２は図１に示す室内機の動作を示すフローチャート、図３は図１に示す室外機の動作を示すフローチャート、図４は実施の形態における圧縮機停止条件および圧縮機復帰条件の内容を運転モードに応じて示す図である。   Next, the operation of the air conditioner according to the embodiment will be described with reference to FIGS. 2 is a flowchart showing the operation of the indoor unit shown in FIG. 1, FIG. 3 is a flowchart showing the operation of the outdoor unit shown in FIG. 1, and FIG. 4 is operated according to the contents of the compressor stop condition and the compressor return condition in the embodiment. It is a figure shown according to a mode.

室内機１および室外機２が停止状態のときには、商用電源５からの電力が室内機１の電源回路１２に供給されており、電源回路１２によって、制御回路１４、リモコン信号受信部１６および通信回路１７の動作に必要な直流電力に変換され、それぞれに供給されている。一方、室外機２側は、室内機１の制御回路１４の制御によるリレースイッチ１３のオフにより、商用電源５からの電力供給が遮断された状態となっている。   When the indoor unit 1 and the outdoor unit 2 are stopped, power from the commercial power supply 5 is supplied to the power supply circuit 12 of the indoor unit 1, and the power supply circuit 12 controls the control circuit 14, the remote control signal receiving unit 16, and the communication circuit. It is converted into DC power necessary for the operation of 17 and supplied to each. On the other hand, on the outdoor unit 2 side, the power supply from the commercial power source 5 is cut off by the relay switch 13 being turned off under the control of the control circuit 14 of the indoor unit 1.

この状態において、空気調和機の使用者がリモコンで運転信号をリモコン信号受信部１７に入力した場合、室内機１の制御回路１４は、図２に示すように、その信号に基づいて室内機１の運転を開始し（Ｓ１１）、圧縮機２５の保護のために所定時間（例えば３分）経過後にリレースイッチ１１３をオンし、室外機２への電力供給を開始する（Ｓ１２）。リレースイッチ１２のオフにより、商用電源５からリレースイッチ１３、電源線３を介して室外機２の電源回路２２へ交流電力が供給される。室外機２の電源回路２２は、交流電力が供給されると、制御回路２３および通信回路２４の動作に必要な直流電力に変換してそれらに供給し、動作可能な状態にする。この時、通信回路２４は、室内機１の通信回路１７との通信を開始し、制御回路２３は、圧縮機２５の運転を開始する（Ｓ２１）。   In this state, when the user of the air conditioner inputs an operation signal to the remote control signal receiving unit 17 with the remote controller, the control circuit 14 of the indoor unit 1 performs the indoor unit 1 based on the signal as shown in FIG. (S11), the relay switch 113 is turned on after a predetermined time (for example, 3 minutes) has passed to protect the compressor 25, and the supply of power to the outdoor unit 2 is started (S12). When the relay switch 12 is turned off, AC power is supplied from the commercial power supply 5 to the power supply circuit 22 of the outdoor unit 2 via the relay switch 13 and the power supply line 3. When the AC power is supplied, the power supply circuit 22 of the outdoor unit 2 converts the DC power necessary for the operation of the control circuit 23 and the communication circuit 24 and supplies them to the power supply circuit 22 so that it can operate. At this time, the communication circuit 24 starts communication with the communication circuit 17 of the indoor unit 1, and the control circuit 23 starts operation of the compressor 25 (S21).

室内機１と室外機２とがリモコンによって設定された運転モード（冷房運転、暖房運転等）で運転されると、室内機１の制御回路１４は、温度センサー１５を介して室内の温度情報を取得し（Ｓ１３）、リモコンによって設定された運転モードと共に通信回路１７から通信線４を介して室外機２に送信する（Ｓ１４）。その後、制御回路１４は、圧縮機停止情報が受信されたか否かを判定し（Ｓ１５）、圧縮機停止情報の受信を検知したときにはＳ１６に移行するが、その情報が受信されていないと判定したときには、Ｓ１３に戻って前述した動作を繰り返す（Ｓ１３〜Ｓ１５）。   When the indoor unit 1 and the outdoor unit 2 are operated in the operation mode (cooling operation, heating operation, etc.) set by the remote controller, the control circuit 14 of the indoor unit 1 sends the indoor temperature information via the temperature sensor 15. Obtained (S13) and transmitted to the outdoor unit 2 from the communication circuit 17 through the communication line 4 together with the operation mode set by the remote controller (S14). Thereafter, the control circuit 14 determines whether or not the compressor stop information has been received (S15). When the reception of the compressor stop information is detected, the process proceeds to S16, but it is determined that the information has not been received. Sometimes, returning to S13, the above-described operation is repeated (S13 to S15).

一方、室外機２の制御回路２３は、運転モードと温度情報が通信回路２４を介して受信されると（Ｓ２２）、室内機１から得た運転モードおよび温度情報を基に圧縮機停止条件であるか否かを判定する（Ｓ２３）。ここで、圧縮機停止条件とは、図４に示すように、運転モードが冷房運転の場合、温度センサー１６により取得した温度情報がリモコン操作により設定された室内の設定温度よりも極端に低くなったときであり、また、運転モードが暖房運転の場合は、温度センサー１６により取得した温度情報がリモコン操作にて設定された室内の設定温度よりも極端に高くなったときである。   On the other hand, when the operation mode and the temperature information are received via the communication circuit 24 (S22), the control circuit 23 of the outdoor unit 2 performs the compressor stop condition based on the operation mode and the temperature information obtained from the indoor unit 1. It is determined whether or not there is (S23). Here, as shown in FIG. 4, when the operation mode is the cooling operation, the compressor stop condition is that the temperature information acquired by the temperature sensor 16 is extremely lower than the indoor set temperature set by the remote control operation. When the operation mode is the heating operation, the temperature information acquired by the temperature sensor 16 is extremely higher than the indoor set temperature set by the remote control operation.

室外機２の制御回路２３は、Ｓ２３において、運転モードと温度情報とから圧縮機停止条件でないと判定したときには、Ｓ２２に戻って室内機１からの運転モードと温度情報を受信し、圧縮機停止条件を満たしたか否かを判定する（Ｓ２３）。制御回路２３は、そのＳ２２，Ｓ２３の動作を繰り返し行っているうちに圧縮機停止条件であると判定したときには圧縮機２５の運転を停止し（Ｓ２４）、次いで、圧縮機２５の停止を知らせる圧縮機停止情報を通信回路２４から通信線４を介して室内機１へ送信する（Ｓ２５）。   When the control circuit 23 of the outdoor unit 2 determines in S23 that the compressor stop condition is not satisfied from the operation mode and temperature information, the control circuit 23 returns to S22 and receives the operation mode and temperature information from the indoor unit 1, and stops the compressor. It is determined whether or not the condition is satisfied (S23). The control circuit 23 stops the operation of the compressor 25 when it is determined that the compressor stop condition is satisfied while repeating the operations of S22 and S23 (S24), and then the compression for notifying the stop of the compressor 25 is performed. Unit stop information is transmitted from the communication circuit 24 to the indoor unit 1 via the communication line 4 (S25).

室内機１の制御回路１４は、運転モードと温度情報を室外機２に繰り返し送信しているときに、Ｓ１５において圧縮機停止情報の受信を検知すると、リレースイッチ１３をオフし、室外機２への電力供給を停止する（Ｓ１６）。その後、制御回路１４は、温度センサー１５を介して室内の温度情報を取得し（Ｓ１７）、その温度情報を基に圧縮機復帰条件であるか否かを判定する（Ｓ１８）。ここで、圧縮機復帰条件とは、図４に示すように、運転モードが冷房運転であるとき、温度センサー１５により取得した温度情報がリモコン操作にて設定された室内の設定温度よりも高く、かつ圧縮機保護のために圧縮機停止情報を受け取った時点から所定時間（例えば３分）以上経過した場合であり、また、運転モードが暖房運転のときには、温度センサー１５により取得した温度情報がリモコン操作により設定された室内の設定温度よりも低く、かつ圧縮機停止情報から所定時間（例えば３分）以上経過している場合である。   When the control circuit 14 of the indoor unit 1 repeatedly receives the operation mode and temperature information to the outdoor unit 2 and detects reception of the compressor stop information in S15, the control circuit 14 turns off the relay switch 13 to the outdoor unit 2. Is stopped (S16). Thereafter, the control circuit 14 acquires indoor temperature information via the temperature sensor 15 (S17), and determines whether or not the compressor return condition is satisfied based on the temperature information (S18). Here, as shown in FIG. 4, when the operation mode is the cooling operation, the compressor return condition is that the temperature information acquired by the temperature sensor 15 is higher than the indoor set temperature set by the remote control operation, In addition, when the compressor stop information is received for the purpose of protecting the compressor, a predetermined time (for example, 3 minutes) or more has elapsed, and when the operation mode is the heating operation, the temperature information acquired by the temperature sensor 15 is the remote control. This is a case where the temperature is lower than the indoor set temperature set by the operation and a predetermined time (for example, 3 minutes) or more has elapsed since the compressor stop information.

室内機１の制御回路１４は、Ｓ１８において、温度情報から圧縮機復帰条件でないと判定したときには、Ｓ１７に戻って温度センサー１５から室内の温度情報を取得し、圧縮機復帰条件を満たしたか否かを判定する（Ｓ１８）。制御回路１４は、そのＳ１７，Ｓ１８の動作を繰り返し行っているうちに圧縮機復帰条件であると判定したときには、Ｓ１２に戻ってリレースイッチ１３をオンし、室外機２への電力供給を開始する。   When the control circuit 14 of the indoor unit 1 determines in S18 that the condition is not the compressor return condition from the temperature information, the process returns to S17 to acquire the indoor temperature information from the temperature sensor 15, and whether or not the compressor return condition is satisfied. Is determined (S18). When the control circuit 14 determines that it is the compressor return condition while repeatedly performing the operations of S17 and S18, the control circuit 14 returns to S12, turns on the relay switch 13, and starts supplying power to the outdoor unit 2. .

以上のように実施の形態によれば、室内機１の制御回路１２は、室外機２の制御回路２３により圧縮機２５が停止されると、リレースイッチ１３をオフして室外機２への電力供給を停止するようにしているので、室外機２側の電力消費を低減できる。また、その分、室外機２の各回路２２，２３，２４への通電時間が短くなり、電子部品の長寿命化を図ることができる。   As described above, according to the embodiment, when the compressor 25 is stopped by the control circuit 23 of the outdoor unit 2, the control circuit 12 of the indoor unit 1 turns off the relay switch 13 to supply power to the outdoor unit 2. Since the supply is stopped, the power consumption on the outdoor unit 2 side can be reduced. In addition, the energization time to each circuit 22, 23, 24 of the outdoor unit 2 is shortened accordingly, and the life of the electronic component can be extended.

１ 室内機、２ 室外機、３ 電源線、４ 通信線、５ 商用電源、１１ 室内機端子台、１２ 電源回路、１３ リレースイッチ、１４ 制御回路、１５ 温度センサー、
１６ リモコン信号受信部、１７ 通信回路、２１ 室外機端子台、２２ 電源回路、
２３ 制御回路、２４ 通信回路、２５ 圧縮機。 DESCRIPTION OF SYMBOLS 1 Indoor unit, 2 Outdoor unit, 3 Power supply line, 4 Communication line, 5 Commercial power supply, 11 Indoor unit terminal block, 12 Power supply circuit, 13 Relay switch, 14 Control circuit, 15 Temperature sensor,
16 remote control signal receiver, 17 communication circuit, 21 outdoor unit terminal block, 22 power supply circuit,
23 control circuit, 24 communication circuit, 25 compressor.

Claims (2)

外部電源と接続され、室内の温度を検出する温度センサーを有し、現在設定されている運転モードと前記温度センサーにより検出された温度を送信する室内機と、
前記室内機に電源線を介して接続され、圧縮機を有し、前記室内機からの運転モードと温度に基づいて前記圧縮機を制御する室外機と、
前記室内機に設けられ、外部電源から電源線を介して前記室外機に供給される電力を入り切りするための開閉手段とを備え、
前記室外機は、前記室内機から受信した運転モードと温度を基に圧縮機停止条件であるか否かを判定し、圧縮機停止条件であったときには前記圧縮機を停止すると共に、前記室内機へ圧縮機停止情報を送信し、
前記室内機は、圧縮機停止情報が受信されたときに前記開閉手段を制御して外部電源と前記室外機との接続を遮断することを特徴とする空気調和機。 An indoor unit that is connected to an external power source and that has a temperature sensor that detects the temperature of the room, and that transmits the currently detected operation mode and the temperature detected by the temperature sensor;
An outdoor unit connected to the indoor unit via a power line, having a compressor, and controlling the compressor based on an operation mode and temperature from the indoor unit;
An opening / closing means provided in the indoor unit, for turning on and off the electric power supplied to the outdoor unit from an external power source via a power line;
The outdoor unit determines whether or not it is a compressor stop condition based on the operation mode and temperature received from the indoor unit. When the compressor stop condition is met, the outdoor unit is stopped and the indoor unit is stopped. Compressor stop information is sent to
The air conditioner is characterized in that when the compressor stop information is received, the indoor unit controls the opening / closing means to cut off a connection between an external power source and the outdoor unit. 前記室内機は、外部電源と前記室外機との接続を遮断したときに、前記温度センサーにより検出された温度を基に圧縮機復帰条件を満たしたか否かを判定し、温度から圧縮機復帰条件を満たしていると判定したときには前記開閉手段を制御して、外部電源の電力を電源線を介して前記室外機に供給することを特徴とする請求項１記載の空気調和機。   The indoor unit determines whether or not the compressor return condition is satisfied based on the temperature detected by the temperature sensor when the connection between the external power source and the outdoor unit is interrupted, and the compressor return condition is determined from the temperature. 2. The air conditioner according to claim 1, wherein when it is determined that the condition is satisfied, the opening / closing means is controlled to supply power from an external power source to the outdoor unit via a power line.
JP2010027763A 2010-02-10 2010-02-10 Air conditioner Pending JP2011163675A (en)

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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10185283A (en) * 1996-12-18 1998-07-14 Fujitsu General Ltd Control method of air conditioner
JPH11187575A (en) * 1997-12-19 1999-07-09 Toshiba Corp Power unit and air conditioner using it
JP2006084060A (en) * 2004-09-14 2006-03-30 Daikin Ind Ltd Separate type air conditioner

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH10185283A (en) * 1996-12-18 1998-07-14 Fujitsu General Ltd Control method of air conditioner
JPH11187575A (en) * 1997-12-19 1999-07-09 Toshiba Corp Power unit and air conditioner using it
JP2006084060A (en) * 2004-09-14 2006-03-30 Daikin Ind Ltd Separate type air conditioner

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