JPH05306842A - Method for operating air conditioner - Google Patents
Method for operating air conditionerInfo
- Publication number
- JPH05306842A JPH05306842A JP4111400A JP11140092A JPH05306842A JP H05306842 A JPH05306842 A JP H05306842A JP 4111400 A JP4111400 A JP 4111400A JP 11140092 A JP11140092 A JP 11140092A JP H05306842 A JPH05306842 A JP H05306842A
- Authority
- JP
- Japan
- Prior art keywords
- inverter
- compressor
- frequency
- indoor
- driven
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Withdrawn
Links
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2400/00—General features or devices for refrigeration machines, plants or systems, combined heating and refrigeration systems or heat-pump systems, i.e. not limited to a particular subgroup of F25B
- F25B2400/07—Details of compressors or related parts
- F25B2400/075—Details of compressors or related parts with parallel compressors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F25—REFRIGERATION OR COOLING; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS; MANUFACTURE OR STORAGE OF ICE; LIQUEFACTION SOLIDIFICATION OF GASES
- F25B—REFRIGERATION MACHINES, PLANTS OR SYSTEMS; COMBINED HEATING AND REFRIGERATION SYSTEMS; HEAT PUMP SYSTEMS
- F25B2600/00—Control issues
- F25B2600/02—Compressor control
- F25B2600/021—Inverters therefor
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
- Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating
Abstract
Description
【０００１】[0001]
【産業上の利用分野】本発明は、インバータ駆動圧縮機
と非インバータ圧縮機が併設された空気調和機に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an air conditioner provided with an inverter-driven compressor and a non-inverter compressor.
【０００２】[0002]
【従来の技術】インバータ駆動圧縮機と非インバータ圧
縮機が併設されて構成される空気調和機の冷媒回路図を
図４に示す。図４において、１はインバータ駆動圧縮
機、２は非インバータ圧縮機、３は四方弁、４は室外熱
交換器、５は室外ファン、６は暖房用絞り、７は逆止
弁、８Ａ〜８Ｄは冷房用絞り、９Ａ〜９Ｄは室内熱交換
器、１０Ａ〜１０Ｄは室内ファン、１１Ａ〜１１Ｄは吸
込温度センサである。2. Description of the Related Art FIG. 4 shows a refrigerant circuit diagram of an air conditioner constructed by combining an inverter-driven compressor and a non-inverter compressor. In FIG. 4, 1 is an inverter driven compressor, 2 is a non-inverter compressor, 3 is a four-way valve, 4 is an outdoor heat exchanger, 5 is an outdoor fan, 6 is a heating throttle, 7 is a check valve, and 8A to 8D. Is a throttle for cooling, 9A to 9D are indoor heat exchangers, 10A to 10D are indoor fans, and 11A to 11D are suction temperature sensors.
【０００３】上記空気調和機の冷房時の運転において
は、圧縮機１（あるいは、インバータ駆動圧縮機１と非
インバータ圧縮機２）で圧縮された高温高圧のガス冷媒
は四方弁３を通り、室外熱交換器４に入り、ここで室外
ファン５により送られる空気によって冷却されて高圧の
液冷媒となり、逆止弁７を経て冷房用絞り８Ａ〜８Ｄで
減圧されて室内熱交換器９Ａ〜９Ｄに入り、室内ファン
１０Ａ〜１０Ｄによって送られる空気に加熱されて低圧
のガス冷媒となり、四方弁３から圧縮機１，２へ戻る。
上記室内ファン１０Ａ〜１０Ｄにより室内熱交換器９Ａ
〜９Ｄに送られた空気は、冷却されて冷房に供される。During the cooling operation of the air conditioner, the high-temperature and high-pressure gas refrigerant compressed by the compressor 1 (or the inverter-driven compressor 1 and the non-inverter compressor 2) passes through the four-way valve 3 and is exposed outdoors. It enters the heat exchanger 4, where it is cooled by the air sent by the outdoor fan 5 to become a high-pressure liquid refrigerant, and is decompressed by the cooling throttles 8A to 8D via the check valve 7 to the indoor heat exchangers 9A to 9D. It enters and is heated by the air sent by the indoor fans 10A to 10D to become a low-pressure gas refrigerant, and returns from the four-way valve 3 to the compressors 1 and 2.
Indoor heat exchanger 9A by the indoor fans 10A to 10D
The air sent to 9D is cooled and is used for cooling.
【０００４】圧縮機の出力を決定する各室内機の要求周
波数（以後室内要求Ｈｚという）は、吸込温度センサ１
１Ａ〜１１Ｄが検知する温度と設定値との差によって求
められ、各室内の要求Ｈｚの和が圧縮機１，２の周波数
となる。圧縮機２は非インバータであるため、ある周波
数で一定しているものと見なされる。The required frequency of each indoor unit that determines the output of the compressor (hereinafter referred to as indoor required Hz) is the suction temperature sensor 1
The sum of the required Hz in each room is the frequency of the compressors 1 and 2, which is obtained by the difference between the temperature detected by 1A to 11D and the set value. Since the compressor 2 is a non-inverter, it is considered to be constant at a certain frequency.
【０００５】従来の圧縮機の作動について、室内要求Ｈ
ｚの変化に対する非インバータ圧縮機２の発停とインバ
ータ駆動圧縮機１の周波数変化を示す図５を用いて以下
に説明する。Regarding the operation of the conventional compressor, the indoor demand H
It will be described below with reference to FIG.
【０００６】図５において、先ず、室内要求Ｈｚが小さ
いときはインバータ駆動圧縮機１だけが駆動（ＯＮ）さ
れ、室内要求Ｈｚが上昇するに従いインバータ駆動圧縮
機１の周波数が上昇する。In FIG. 5, first, when the indoor demand Hz is small, only the inverter drive compressor 1 is driven (ON), and the frequency of the inverter drive compressor 1 increases as the indoor demand Hz increases.
【０００７】室内要求Ｈｚがインバータ駆動圧縮機１の
最大周波数（これをＥＨｚとする）まで増加すると、次
に、非インバータ圧縮機２が駆動（ＯＮ）され、インバ
ータ駆動圧縮機１は最低周波数まで下げ、室内要求Ｈｚ
が更に増すと、インバータ駆動圧縮機１の周波数を再び
上げる。室内要求Ｈｚが低下しＥＨｚまで下ると、非イ
ンバータ圧縮機２を停止（ＯＦＦ）し、インバータ駆動
圧縮機１はその周波数を最低から最高の周波数まで上昇
させる。When the indoor demand Hz increases to the maximum frequency of the inverter-driven compressor 1 (this is referred to as EHz), the non-inverter compressor 2 is then driven (ON) and the inverter-driven compressor 1 reaches the lowest frequency. Lower, indoor demand Hz
Is further increased, the frequency of the inverter-driven compressor 1 is increased again. When the indoor demand Hz decreases to EHz, the non-inverter compressor 2 is stopped (OFF), and the inverter drive compressor 1 increases its frequency from the lowest frequency to the highest frequency.
【０００８】上記に説明した圧縮機の運転方法が、従来
の制御パターンであった。The method of operating the compressor described above is the conventional control pattern.
【０００９】[0009]
【発明が解決しようとする課題】従来の方法において、
室内要求ＨｚがＥＨｚ近辺となっており、この状態で室
内要求Ｈｚが変化すると、非インバータ圧縮機は発停
を、また、インバータ駆動圧縮機は、最大、最小周波数
の間でのインチング運転となるため、圧縮機を損傷させ
ることがあった。DISCLOSURE OF THE INVENTION In the conventional method,
The indoor required Hz is in the vicinity of EHz, and when the indoor required Hz changes in this state, the non-inverter compressor starts and stops, and the inverter-driven compressor operates inching between the maximum and minimum frequencies. Therefore, the compressor may be damaged.
【００１０】本発明は上記の課題を解決しようとするも
のである。The present invention is intended to solve the above problems.
【００１１】[0011]
【課題を解決するための手段】本発明の空気調和機の運
転方法は、少なくとも１台のインバータ駆動圧縮機と少
なくとも１台の非インバータ圧縮機とからなる複数台の
圧縮機を備え、負荷に応じた室内要求Ｈｚに基づいて前
記複数台の圧縮機の運転を行う空気調和機において、前
記インバータ駆動圧縮機が最大周波数に達したのち非イ
ンバータ圧縮機を駆動する室内要求Ｈｚと、前記インバ
ータ駆動圧縮機が最小周波数に達したのち前記非インバ
ータ圧縮機を停止する室内要求Ｈｚとの間にディファレ
ンシャルを設定してなることを特徴としている。A method of operating an air conditioner according to the present invention comprises a plurality of compressors each including at least one inverter-driven compressor and at least one non-inverter compressor, and a load. In the air conditioner that operates the plurality of compressors based on the requested indoor frequency Hz, the requested indoor frequency to drive the non-inverter compressor after the inverter-driven compressor reaches the maximum frequency, and the inverter drive It is characterized in that a differential is set with respect to the indoor required Hz for stopping the non-inverter compressor after the compressor reaches the minimum frequency.
【００１２】[0012]
【作用】上記において、室内要求Ｈｚが小さい場合はイ
ンバータ駆動圧縮機のみを駆動して、該圧縮機の周波数
を室内要求Ｈｚに追従させる。In the above, when the indoor required Hz is small, only the inverter drive compressor is driven so that the frequency of the compressor follows the indoor required Hz.
【００１３】前記室内要求Ｈｚが増加して前記圧縮機の
最大周波数を越えた場合、室内要求Ｈｚが該圧縮機の最
小周波数と非インバータ圧縮機の周波数の合計周波数以
内であれば、前記インバータ駆動圧縮機のみを最大周波
数で運転を継続し、室内要求Ｈｚが更に増加して前記合
計周波数を越えた時点には、前記インバータ駆動圧縮機
を最小周波数として非インバータ圧縮機を起動し、イン
バータ駆動圧縮機の周波数を室内要求Ｈｚの変化に追従
させる。When the indoor required Hz increases and exceeds the maximum frequency of the compressor, if the indoor required Hz is within the total frequency of the minimum frequency of the compressor and the frequency of the non-inverter compressor, the inverter drive is performed. Only the compressor continues to operate at the maximum frequency, and when the indoor required Hz further increases and exceeds the total frequency, the inverter-driven compressor is started as the minimum frequency to start the inverter-driven compression. The machine frequency is made to follow the change in the indoor required Hz.
【００１４】また、室内要求Ｈｚが大きく前記インバー
タ駆動圧縮機と非インバータ圧縮機が同時運転している
状態で室内要求Ｈｚが低下した場合、室内要求Ｈｚが前
記合計周波数と最大周波数の範囲内であれば、前記イン
バータ駆動圧縮機を最小周波数として非インバータ圧縮
機との同時運転を継続し、室内要求Ｈｚが更に減少して
前記最大周波数以下となった時点には、前記非インバー
タ圧縮機を停止してインバータ駆動圧縮機を最大周波数
とし、以後その周波数を室内要求Ｈｚに追従させる。Further, when the indoor required Hz is large and the indoor required Hz is lowered in a state where the inverter driven compressor and the non-inverter compressor are simultaneously operating, the indoor required Hz falls within the range of the total frequency and the maximum frequency. If so, the inverter-driven compressor is used as the minimum frequency to continue the simultaneous operation with the non-inverter compressor, and the non-inverter compressor is stopped at the time when the indoor required Hz is further reduced and becomes equal to or less than the maximum frequency. Then, the inverter-driven compressor is set to the maximum frequency, and thereafter, the frequency is made to follow the indoor required Hz.
【００１５】上記により、室内要求周波数が増減しても
非インバータ圧縮機が発停せず、インバータ駆動圧縮機
の周波数が変化しない領域を設けたため、圧縮機の発停
及び周波数変化のインチングの防止が可能となる。As described above, since the non-inverter compressor does not start and stop even when the indoor required frequency increases and decreases, and the frequency of the inverter-driven compressor does not change, the starting and stopping of the compressor and the inching of the frequency change are prevented. Is possible.
【００１６】[0016]
【実施例】本発明の一実施例を図１乃至図４により説明
する。なお、本実施例については、その装置構成は図４
に示す従来のものと同様であり、また圧縮機の出力を決
定する室内要求Ｈｚの決め方も従来と同様であるため、
それらの説明は省略する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. In addition, in the present embodiment, the device configuration is shown in FIG.
Since it is the same as the conventional one shown in Fig. 1, and the method of determining the indoor required Hz for determining the output of the compressor is also the same as the conventional one,
Descriptions thereof are omitted.
【００１７】図１に示す本実施例の運転方法は、次の通
りである。即ち室内要求ＨｚがＥ1以下の状態から増加
する場合、室内要求Ｈｚがインバータ駆動圧縮機１の最
高周波数Ｅ1 に達した時点では、非インバータ圧縮機２
は起動せず、インバータ駆動圧縮機１の周波数も最高周
波数Ｅ1 のままとする。更に、室内要求Ｈｚが増してＥ
2 に達すると、インバータ駆動圧縮機１の周波数を下
げ、非インバータ圧縮機２の運転を開始する。The operation method of this embodiment shown in FIG. 1 is as follows. That is, when the indoor demand Hz increases from a state of E 1 or less, when the indoor demand Hz reaches the maximum frequency E 1 of the inverter-driven compressor 1, the non-inverter compressor 2
Does not start, and the frequency of the inverter-driven compressor 1 remains at the maximum frequency E 1 . In addition, the indoor demand Hz increases and E
When it reaches 2 , the frequency of the inverter-driven compressor 1 is lowered and the operation of the non-inverter compressor 2 is started.
【００１８】上記非インバータ圧縮機２の起動後のイン
バータ駆動圧縮機１との並列運転時に、室内要求Ｈｚが
減少する場合は、室内要求ＨｚがＥ2 以下となった時点
では非インバータ圧縮機２は停止しない。更に、室内要
求Ｈｚが低下し、室内要求ＨｚがＥ1 以下になると、非
インバータ圧縮機２を停止させ、インバータ駆動圧縮機
１の周波数を上昇させる。During the parallel operation with the inverter-driven compressor 1 after the non-inverter compressor 2 is started, if the indoor required Hz decreases, the non-inverter compressor 2 is reduced when the indoor required Hz becomes E 2 or less. Does not stop. Further, when the indoor demand Hz decreases and the indoor demand Hz becomes E 1 or less, the non-inverter compressor 2 is stopped and the frequency of the inverter drive compressor 1 is increased.
【００１９】上記については、図２の機能ブロック図に
示す機能を有する装置を図４に示すコントローラ２０内
に設けたことによるものであり、以下にその内容を説明
する。The above is due to the fact that the device having the functions shown in the functional block diagram of FIG. 2 is provided in the controller 20 shown in FIG. 4, and the contents will be described below.
【００２０】上記において、１０１は図４に示す室内機
に配設された吸込温度センサ１１Ａ〜１１Ｄにより検知
された室内の吸込空気温度を入力して室内要求Ｈｚを求
める室内要求周波数検知手段であり、１０７は予じめ決
められた設定周波数Ｅ1 ，Ｅ 2 が設定された周波数設定
手段である。In the above, 101 is the indoor unit shown in FIG.
Detected by suction temperature sensors 11A to 11D
Input the temperature of the intake air in the room that has been
The indoor required frequency detecting means 107,
Set frequency E1, E 2Set frequency
It is a means.
【００２１】１０２は前記室内要求周波数検知手段１０
１と周波数設定手段より室内要求Ｈｚと設定周波数
Ｅ1 ，Ｅ2 を入力して比較する比較手段であり、１０３
は該比較手段１０２より比較結果を入力して非インバー
タ圧縮機２の発停を決定する非インバータ圧縮機発停決
定手段であり、１０４は該発停決定手段１０３により決
定された発停信号を入力して非インバータ圧縮機２の発
停を制御する非インバータ圧縮機発停出力手段である。Reference numeral 102 denotes the indoor required frequency detecting means 10
1 is a comparing means for inputting and comparing the requested indoor frequency Hz and the set frequencies E 1 and E 2 from the frequency setting means.
Is a non-inverter compressor start / stop determining means for inputting the comparison result from the comparing means 102 to determine the start / stop of the non-inverter compressor 2, and 104 denotes the start / stop signal determined by the start / stop determining means 103. It is a non-inverter compressor start / stop output means for inputting and controlling start / stop of the non-inverter compressor 2.
【００２２】また、１０５は前記比較手段１０２より室
内要求Ｈｚと設定周波数Ｅ1 ，Ｅ2の比較結果を入力し
てインバータ圧縮機１の周波数を決定するインバータ圧
縮機周波数決定手段であり、１０６は該周波数決定手段
１０５により決定された周波数を入力してインバータ駆
動圧縮機１を周波数制御するインバータ圧縮機周波数出
力手段である。Reference numeral 105 is an inverter compressor frequency determining means for determining the frequency of the inverter compressor 1 by inputting the comparison result of the indoor required Hz and the set frequencies E 1 and E 2 from the comparing means 102, and 106 is It is an inverter compressor frequency output means for inputting the frequency determined by the frequency determining means 105 and controlling the frequency of the inverter drive compressor 1.
【００２３】図２に示す装置によるインバータ駆動圧縮
機１と非インバータ圧縮機２の制御は、前記非インバー
タ圧縮機発停決定手段１０３とインバータ圧縮機周波数
決定手段１０５に設けられ、図３にそのフローチャート
を示すロジックに基づいて行われる。Control of the inverter-driven compressor 1 and the non-inverter compressor 2 by the apparatus shown in FIG. 2 is provided in the non-inverter compressor start / stop determining means 103 and the inverter compressor frequency determining means 105, and FIG. This is performed based on the logic showing the flowchart.
【００２４】即ち、インバータ駆動圧縮機１の周波数が
設定周波数Ｅ1 に達しており、非インバータ圧縮機２が
駆動されていない状態で、室内要求Ｈｚが設定周波数Ｅ
2 以上となれば、インバータ駆動圧縮機１の周波数は最
小周波数として非インバータ圧縮機２を駆動する。ま
た、インバータ駆動圧縮機１の周波数が設定周波数Ｅ1
でなく、最小周波数に達していない状態で、室内要求Ｈ
ｚが設定周波数Ｅ1 以下となれば、非インバータ圧縮機
２は停止させてインバータ圧縮機１の周波数を室内要求
Ｈｚとする。That is, when the frequency of the inverter-driven compressor 1 has reached the set frequency E 1 and the non-inverter compressor 2 is not driven, the indoor required Hz is the set frequency E 1.
When it is 2 or more, the frequency of the inverter-driven compressor 1 is set to the minimum frequency to drive the non-inverter compressor 2. In addition, the frequency of the inverter-driven compressor 1 is the set frequency E 1
, And the indoor demand H when the minimum frequency is not reached.
When z becomes equal to or lower than the set frequency E 1 , the non-inverter compressor 2 is stopped and the frequency of the inverter compressor 1 is set to the indoor required Hz.
【００２５】上記により、室内要求周波数が増減しても
非インバータ圧縮機が発停せず、インバータ駆動圧縮機
の周波数が変化しない領域が設けられたため、圧縮機の
発停及び周波数変化のインチング防止が可能となった。As described above, since the non-inverter compressor does not start and stop even if the indoor required frequency increases or decreases, and the frequency of the inverter-driven compressor does not change, the inching of the start and stop of the compressor and the frequency change is prevented. Became possible.
【００２６】[0026]
【発明の効果】本発明の空気調和機の運転方法は、イン
バータ駆動圧縮機が最大周波数に達したのち非インバー
タ圧縮機を駆動する室内要求周波数と、インバータ駆動
圧縮機の最小周波数に達したのち非インバータ圧縮機を
停止する室内要求周波数との間にディファレンシャルを
設定したことによって、室内要求周波数が増減しても非
インバータ圧縮機が発停せず、インバータ駆動圧縮機の
周波数が変化しない領域が設けられたため、圧縮機の発
停及び周波数変化のインチングの防止が可能となる。According to the method of operating an air conditioner of the present invention, after the inverter driven compressor reaches the maximum frequency, the indoor required frequency for driving the non-inverter compressor and the minimum frequency of the inverter driven compressor are reached. By setting the differential with the indoor required frequency to stop the non-inverter compressor, the non-inverter compressor does not start and stop even if the indoor required frequency increases or decreases, and there is a region where the frequency of the inverter-driven compressor does not change. Since it is provided, it is possible to prevent the start and stop of the compressor and the inching of the frequency change.
【図１】本発明の一実施例に係る室内要求Ｈｚに対す圧
縮機の発停と周波数変化の説明図である。FIG. 1 is an explanatory diagram of start / stop of a compressor and a frequency change with respect to an indoor required Hz according to an embodiment of the present invention.
【図２】上記一実施例に係る機能ブロック図である。FIG. 2 is a functional block diagram according to the above embodiment.
【図３】上記一実施例に係る制御のフローチャートであ
る。FIG. 3 is a flowchart of control according to the above embodiment.
【図４】インバータ駆動圧縮機と非インバータ圧縮機が
併設された冷媒回路の説明図である。FIG. 4 is an explanatory diagram of a refrigerant circuit provided with an inverter-driven compressor and a non-inverter compressor.
【図５】従来の方法に係る室内要求Ｈｚに対する圧縮機
の発停と周波数変化の説明図である。FIG. 5 is an explanatory diagram of starting / stopping of a compressor and frequency change with respect to indoor demand Hz according to a conventional method.
１ インバータ駆動圧縮機 ２ 非インバータ圧縮機 １１Ａ〜１１Ｄ 吸込温度センサ ２０ コントローラ 1 Inverter drive compressor 2 Non-inverter compressor 11A-11D Suction temperature sensor 20 Controller
Claims (1)
と少なくとも１台の非インバータ圧縮機とからなる複数
台の圧縮機を備え、負荷に応じた室内要求周波数に基づ
いて前記複数台の圧縮機の運転を行う空気調和機におい
て、前記インバータ駆動圧縮機が最大周波数に達したの
ち非インバータ圧縮機を駆動する室内要求周波数と、前
記インバータ駆動圧縮機が最小周波数に達したのち前記
非インバータ圧縮機を停止する室内要求周波数との間に
ディファレンシャルを設定してなることを特徴とする空
気調和機の運転方法。1. A plurality of compressors comprising at least one inverter-driven compressor and at least one non-inverter compressor, the plurality of compressors being based on a required indoor frequency corresponding to a load. In an air conditioner that operates, the indoor drive frequency that drives the non-inverter compressor after the inverter drive compressor reaches the maximum frequency, and the non-inverter compressor after the inverter drive compressor reaches the minimum frequency. A method of operating an air conditioner, characterized in that a differential is set with respect to a required indoor frequency to be stopped.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4111400A JPH05306842A (en) | 1992-04-30 | 1992-04-30 | Method for operating air conditioner |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4111400A JPH05306842A (en) | 1992-04-30 | 1992-04-30 | Method for operating air conditioner |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH05306842A true JPH05306842A (en) | 1993-11-19 |
Family
ID=14560196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4111400A Withdrawn JPH05306842A (en) | 1992-04-30 | 1992-04-30 | Method for operating air conditioner |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH05306842A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08271066A (en) * | 1995-03-31 | 1996-10-18 | Takasago Thermal Eng Co Ltd | Number-of-refrigerators controller for refrigerator |
-
1992
- 1992-04-30 JP JP4111400A patent/JPH05306842A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH08271066A (en) * | 1995-03-31 | 1996-10-18 | Takasago Thermal Eng Co Ltd | Number-of-refrigerators controller for refrigerator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| A300 | Withdrawal of application because of no request for examination |
Free format text: JAPANESE INTERMEDIATE CODE: A300 Effective date: 19990706 |