JPS60235933A - Controlled method of multiple separate room type air conditioner - Google Patents

Abstract

PURPOSE:To enable to operate a compressor continuously by a constitution wherein the differences between the set values of temperature and room temperatures of respective air-conditioned rooms are compared with each other and the increasing and decreasing percentage of the capacity of the compressor is changed based upon the resultant temperature data, when the increase and decrease of the capacity of the compressor becomes inevitable, in the titled air conditioner, in which a variable capacity type compressor is employed. CONSTITUTION:The differences D14 and D15 between the set temperatures and room temperatures of respective air-conditioned rooms 2 and 3 calculated at indoor control parts 14 and 15 are inputted to an outdoor control part 16. When both D14 and D15 are 2 deg. or more, the control part puts a compressor in full power operation. When D14 and D15 are 2 deg. or less, the difference between D14 and D15 is calculated so as to calculate the value to increase the decrease of the rotational frequency based upon the predetermined characteristic figure in order to set the rotational frequency of the compressor 4. At that time, the value to increase and decrease alpha of the rotational frequency is set so that the decreasing percentage is larger when alpha is negative, while the increasing percentage is smaller when alpha is positive. Due to the constitution as described above, the compressor can be operated continuously at the rotational frequency suitable for air-conditioning load.

Description

【発明の詳細な説明】 （イ）産業上の利用分野 本発明は１台の室外ユニットに複数台の室内ユニットを
分岐接続してなる多室分離型空気調和機の能力制御方法
に係るものである。[Detailed Description of the Invention] (a) Industrial Application Field The present invention relates to a method for controlling the capacity of a multi-room separated air conditioner in which a plurality of indoor units are branch-connected to one outdoor unit. be.

（ロ）従来技術 一般に従来の多室分離型空気調和機としては特開昭５７
−４３１４９号公報に示すようなものがあった。この公
報には「連続可変速駆動可能な圧縮機を塔載した１台の
室外ユニットに複数台の室内ユニットを接続してなる多
室形空気調和装置において、前記圧縮機の駆動用モータ
に給電して可変速駆動するモータ制御回路と、各室の室
温と設定温度との差に対応した温度差信号を発する複数
個の温度差検出回路と、前記複数個の温度差信号を入力
しこれらの温度差信号に係合し、かつ前記圧縮機の最高
回転数の設定値が前記複数台の室内ユニットの運転台数
もしくは室内空気の熱交換作用を行なっている台数に対
応するようＫなした回転数設定信号を前記モータ制御回
路に発する回転数設定回路とを具備した」ものが記載さ
れていた。(b) Prior art In general, the conventional multi-chamber separation type air conditioner is
There was one as shown in Publication No.-43149. This publication states, ``In a multi-room air conditioning system in which multiple indoor units are connected to one outdoor unit equipped with a compressor that can be driven at a continuously variable speed, power is supplied to the drive motor of the compressor. a motor control circuit that drives the motor at variable speed; a plurality of temperature difference detection circuits that emit temperature difference signals corresponding to the difference between the room temperature of each room and a set temperature; A rotational speed that engages with a temperature difference signal and is set such that the set value of the maximum rotational speed of the compressor corresponds to the number of operating indoor units or the number of indoor units performing heat exchange of indoor air. and a rotation speed setting circuit that issues a setting signal to the motor control circuit.''

このような装置を用いた場合、圧縮機の回転数（能力）
は、各室内−３−′−ノドからの温度差信号を入力し、
かつこの信号の総和に基づいて設定していたので、各室
内ユニットから温度差信号を入力している間のみ回転数
（能力）の制御が行えるが、各室内ユニットでの室温と
設定温度との差がｏ”もしくは小さくなった時には、温
度差信号は″ｏ″信号として出力され圧縮機が停止して
しまう問題点があった。このように各室内の温度が設定
値付近にある時には圧縮機の起動もしくは停止が頻繁に
行なわれ、圧縮機の寿命が短くなると同時圧室内の温度
変動幅が大きくなる問題点があった。When using such equipment, the rotation speed (capacity) of the compressor
inputs the temperature difference signal from the -3-'-node in each room,
In addition, since the setting was based on the sum of these signals, the rotation speed (capacity) could be controlled only while the temperature difference signal was being input from each indoor unit, but it was not possible to control the rotation speed (capacity) only while inputting the temperature difference signal from each indoor unit. There was a problem that when the difference became "o" or small, the temperature difference signal was output as "o" signal and the compressor stopped.In this way, when the temperature in each room was around the set value, the compressor stopped. There is a problem in that when the compressor is started or stopped frequently and the life of the compressor is shortened, the range of temperature fluctuation within the simultaneous pressure chamber becomes large.

（ハ）　発明の目的 斯る問題点１１Ｃ＠み、本発明は能力可変型の圧縮機を
用いた多室分離型空気調和機に係り、特に圧縮機の起動
、停止の回数を減らして連続運転が維持できるようにす
る制御方法を提案するものである。(c) Purpose of the Invention In view of the problem 11C@, the present invention relates to a multi-chamber separated air conditioner using a variable capacity compressor, and in particular to a continuous operation by reducing the number of times the compressor is started and stopped. This paper proposes a control method that allows the maintenance of

に）　発明の構成 本発明の制御方法は能力可変型の圧縮機及び室外側熱交
換器を有する１台の室外ユニッ）Ｋ室内側熱交換器を有
する複数台の室内ユニットを冷媒配管で接続した分離型
空気調和機において、夫々の室内ユニットを設置した空
気調和室の設定値と室温との温度差を検出し、この夫々
の温度差な比較して得られる温度データで圧縮機の能力
の増減を行なうとき温度データに基づく圧縮機の能力の
増加割合と減少割合とを異ならせて空気調和機の制御性
を向上させたものである。2) Structure of the Invention The control method of the present invention consists of a single outdoor unit having a variable capacity compressor and an outdoor heat exchanger, and a) a plurality of indoor units each having an indoor heat exchanger connected by refrigerant piping. In a separate air conditioner, the temperature difference between the set value of the air conditioning room where each indoor unit is installed and the room temperature is detected, and the temperature data obtained by comparing these temperature differences can be used to increase or decrease the compressor capacity. The controllability of the air conditioner is improved by changing the rate of increase and rate of decrease in the capacity of the compressor based on temperature data.

（ホ）実施例 以下本発明の実施例を第１図乃至第３図に基づい℃説明
すると、先づ第１図は本発明を１台の室内ユニット（１
）ＶＣ対して２台の室内ユニット（２）、（３）を夫々
の空気調和室に偏えた多室分離型空気調和機に用いた概
略図である。先づこの冷媒回路圧ついて説明すると、室
外ユニノ）　（１）Ｋは回転数を変えることで能力の変
わる能力可変型の圧縮機（４）、室外側熱交換器（５）
、送風機（６）、四方切換弁（７）及び比例制御弁（８
）、（９）が冷媒配管で接続されている。(E) Examples Below, examples of the present invention will be explained based on FIGS. 1 to 3. First, FIG.
) is a schematic diagram used in a multi-room separation type air conditioner in which two indoor units (2) and (3) are separated into respective air conditioning rooms with respect to VC. First, let me explain about the refrigerant circuit pressure. (1) K is a variable capacity compressor (4) whose capacity changes by changing the rotation speed, and an outdoor heat exchanger (5).
, blower (6), four-way switching valve (7) and proportional control valve (8)
) and (9) are connected by refrigerant piping.

この比例制御弁（８）、（９）は印加電圧に比例して弁
の開度な（冷媒の流量を）制御するものであり、印加電
圧がＯｃｖ〕で全開状態となり、印加電圧が定格電圧で
全閉状態となる。室内ユニット（２）には室内側熱交換
器αＱ、送風機αυを備え、室内側熱交換器Ｑ（ｌは室
外ユニッ）　（１）Ｋ冷媒配管で接続されている。室内
ユニット（３）には室内ユニット（２）と同様に室内側
熱交換器α３、送風機０階を有している。These proportional control valves (8) and (9) control the valve opening (refrigerant flow rate) in proportion to the applied voltage, and are fully open when the applied voltage is Ocv, and the applied voltage is equal to the rated voltage. becomes fully closed. The indoor unit (2) is equipped with an indoor heat exchanger αQ and a blower αυ, and is connected to the indoor heat exchanger Q (l is the outdoor unit) by a refrigerant pipe (1)K. Like the indoor unit (2), the indoor unit (3) has an indoor heat exchanger α3 and a blower on the 0th floor.

また、この電気回路は室内ユニット（２）、（３）Ｉｃ
設けられた室内制御部ｊｉ、ａｉと室外ユニット（１）
Ｋ設けられた室外制御部α（へ）とからなっている。室
内制御部０４）、０９は夫々室温設定器ａη、α本室温
検出器ｔｔ！Ｊ、ｃ！ｌを有、し、室外制御部ｔｔｅか
らの所定周期毎の信号に応答して室温設定値と実際の室
温との温度差を室外制御部叫へ出力するものである。室
外制御部ａｅは室内制御部ａ４）、（１つからの出力に
基づいて圧縮機（４）の能力及び比例制御弁（８）、（
９）の開度な制御するものである。Also, this electric circuit is connected to indoor units (2), (3) Ic
Indoor control unit ji, ai and outdoor unit (1) provided
It consists of an outdoor control section α (to) provided at K. The indoor control units 04) and 09 are a room temperature setter aη and an α room temperature detector tt!, respectively. J,c! 1, and outputs the temperature difference between the room temperature set value and the actual room temperature to the outdoor controller in response to a signal from the outdoor controller at predetermined intervals. The outdoor control unit ae controls the capacity of the compressor (4) and the proportional control valve (8) based on the output from the indoor control units a4) and (1).
9) is used to control the opening degree.

この室外制御部（１ｅの動作は第２図のフローチャート
図に従って動作する。先づ電源投入などで運転を開始さ
せると初期設定で比例制御弁（８）、（９）へ与える制
御電圧Ｂｔ８）、　Ｂ１９）を０〔■〕”とする。The operation of this outdoor control unit (1e) operates according to the flowchart shown in Fig. 2. When the operation is started by turning on the power, etc., the control voltage Bt8 applied to the proportional control valves (8) and (9) in the initial setting, B19) is set to 0 [■]".

同時に圧縮機（４）の回転数（能力）設定値Ｖ）を０″
とする。この後、室外二二ッ）　（１１の保護動作、例
えば圧縮機（４）の過電流や圧縮機（４）の吐出圧力な
どを検出して異常時には圧縮機（４）の運転を停止させ
るなどの保護動作を行なうものである。次に室内制御部
α荀の出力Ｄ（１４）（空気調和室内の実際の温度と設
定温度との差）及び室内制御部（１！１９の出力Ｄ０９
を入力する。次にこの値ＤＱ４１、ＤＯＳが”ＤＯ４）
＞２″″ＤＱ！１９＞２’か否かを判定する。ＤＱ４１
．　ＤＯＳのいずれかもしくは両方の値が２より太きけ
れば圧縮機（４）の回転数Ｖ）を最大値にして全能力運
転を行なう。これは空気調和機の運転開始時や空調負荷
の急激な変動に対応するためのものである。”ＤＱ４）
〉２″、”　ＤＱ！Ｊ＞　２　’　テｌｘイナラば、”
Ｄ（ｔ）＝Ｄ０４）　−Ｄ　Ｑ’５”の演算を行ない。At the same time, the rotation speed (capacity) setting value V) of the compressor (4) is set to 0''.
shall be. After this, the outdoor 22) (Protection operation in 11, such as detecting overcurrent of the compressor (4) or discharge pressure of the compressor (4), etc., and stopping the operation of the compressor (4) in the event of an abnormality, etc.) Next, the output D (14) of the indoor control unit α (difference between the actual temperature and the set temperature in the air conditioning room) and the output D09 of the indoor control unit (1!19)
Enter. Next, this value DQ41, DOS is “DO4”
>2″″DQ! It is determined whether 19>2'. DQ41
．． If either or both values of DOS are larger than 2, the rotational speed V) of the compressor (4) is set to the maximum value and full capacity operation is performed. This is to cope with the start of operation of the air conditioner and sudden changes in the air conditioning load. “DQ4)
〉2″,” DQ! J> 2 'Tel x Inaraba,''
D(t)=D04)-DQ'5'' is calculated.

第３図に示す特性図に基づいて回転数の増減値（φをめ
、新らたな圧縮機（４）の回転数ｆをｆ＝ｆ＋α”と演
算して設定するものである。尚、第３図は暖房運転時の
特性図であり、図中の特性（ａ）と特性（ｂ）では傾き
が異っている。これはαが負の時すなわち空調負荷が減
少して圧縮機（４）の回転数Ｖ）を減らす時に回転数（
イ）の減少比率を大きくしている。このようにデータ差
ＤＣ句が正領域及び負領域で夫々設定される圧縮機（４
）の回転数φの増減値（ｃｔＪを定める特性が原点に対
して対称な象現で非対称となり、空調負荷が減少して圧
縮機（４）の能力をあまり必要としない時には速やかに
圧縮機（４）の回転数を減らすことができる。尚、第３
図中の特性（ｂ）は圧縮機（４）の回転数（イ）を変え
ない範囲である。このように圧縮機（４）の回転数（イ
）を設定した後、さらにデータ差Ｄ　（ｔ）の値に基づ
いて、比例制御弁（８）、（９）の開度な定め、夫々の
空調負荷の大きさに見合う比率で冷媒が分配されるよう
Ｋするものである。この後、再び室外ユニットの保護動
作の位置へもどるものである。Based on the characteristic diagram shown in FIG. 3, the increase/decrease value of the rotation speed (by taking φ and calculating the new rotation speed f of the compressor (4) as f=f+α" is set. Figure 3 is a characteristic diagram during heating operation, and the slopes of characteristic (a) and characteristic (b) in the figure are different.This is because when α is negative, that is, when the air conditioning load decreases, the compressor ( When reducing the rotation speed V) in 4), the rotation speed (
The rate of decrease in b) is increasing. In this way, a compressor (4
) The characteristic that determines the increase/decrease value (ctJ) of the rotational speed φ becomes asymmetrical in a symmetrical quadrant with respect to the origin, and when the air conditioning load decreases and the capacity of the compressor (4) is not required as much, the compressor ( 4) The number of revolutions can be reduced.
Characteristic (b) in the figure is a range in which the rotation speed (a) of the compressor (4) is not changed. After setting the rotation speed (a) of the compressor (4) in this way, the opening degrees of the proportional control valves (8) and (9) are determined based on the value of the data difference D (t), and the respective openings are determined based on the value of the data difference D (t). This is to distribute the refrigerant at a ratio commensurate with the size of the air conditioning load. After this, the outdoor unit returns to the protective operation position again.

以上のように構成された多室分離型空気調和機の運転を
開始させると、先づ比例制御弁（８）、（９）が全開で
かつ圧縮機（４）の回転数ｆがｆ＝０”となっている。When the multi-room separated air conditioner configured as described above starts operating, first the proportional control valves (8) and (9) are fully open and the rotation speed f of the compressor (4) is f=0. ”.

この時、室外ユニッｌ）Ｋ異常がなければ、室内ユニッ
ト（２）、（３）の室内制御部Ｉ、α１から夫々の空気
調和室における設定値と実際の室温との温度差ＤＱ机Ｄ
←９を入力する。運転開始時には空気調和室圧おける設
定値と実際の室温との温度差が大きくその値が２以上で
あるため圧縮機（４）の回転数ｆは’ｆ＝ＭＡＸ（最大
能力）”Ｋ設定される。比例制御弁（８）、（９）の開
度は温度差ＤＯ４）、Ｄ（１！９に基づいて冷媒流量が
分配されるように設定される。このように圧縮機（４）
の回転数ｆがｆ＝ＭＡＸ″で運転した後に室温の設定値
と実際の室温との差が小さくなると、この温度差ＤＱ４
）、ＤＱ５に基づいてＤ（ｔ）＝　ＤＱ４）　−ＤＱ！
９”を演算し第３図の特性図を用いて圧縮機（４）の回
転数ｆを変化させる。これは室内ユニット（２）を主側
として回転数ｆの制御をするものであり、これは比例制
御弁（８）、（９）の開度の制御と共に行なわれる。例
えばＤ　（ｔ）　＜０すなわち温度差がＤＯ（イ）＜　
Ｄ　０５１　”の時は室内ユニット（８）の空調負荷が
小さくなったこと、もしくは室温が設定値に近ずいたこ
とであり、この分、圧縮機（４）の回転数ｆをｆ＝ｆ−
α”として下げれば良い。同時に比例制御弁（８）、（
９）の開度もＢ（８）　＜　Ｂ　ｔ９１となり、次の状
態では室内ユニット（３）の側へ流れる冷媒の流量を増
加させて室内ユニット（３）側を主に設定温度に近づけ
るように動作する。At this time, if there is no abnormality in the outdoor unit (l)K, the temperature difference DQ between the set value and the actual room temperature in each air conditioning room is detected from the indoor control parts I and α1 of the indoor units (2) and (3).
←Enter 9. At the start of operation, the temperature difference between the set value of the air conditioning room pressure and the actual room temperature is large and the value is 2 or more, so the rotation speed f of the compressor (4) is set to 'f = MAX (maximum capacity)'K. The opening degrees of the proportional control valves (8) and (9) are set so that the refrigerant flow rate is distributed based on the temperature difference DO4), D(1!9).
When the difference between the room temperature set value and the actual room temperature becomes smaller after operating at the rotation speed f = MAX'', this temperature difference DQ4
), based on DQ5 D(t) = DQ4) −DQ!
9" and change the rotation speed f of the compressor (4) using the characteristic diagram in Figure 3. This is to control the rotation speed f using the indoor unit (2) as the main side. is carried out together with the control of the opening degrees of the proportional control valves (8) and (9).For example, if D (t) <0, that is, if the temperature difference is DO (a) <
D 051'' means that the air conditioning load on the indoor unit (8) has decreased or the room temperature has approached the set value, and the rotation speed f of the compressor (4) is increased by f=f-
α”.At the same time, the proportional control valve (8), (
9) also becomes B(8) < B t91, and in the next state, the flow rate of the refrigerant flowing to the indoor unit (3) side is increased to bring the indoor unit (3) side mainly close to the set temperature. Operate.

またＤ（＄１＞０すなわち温度差が□　ＤＯ４１＞　Ｄ
ｏｓ　□。　；′時には圧縮機（４）の回転数ｆを”ｆ
＝ｆ＋α”とし゛て増加させれば良い。（但し回転数ｆ
はｆ＝ＭＡＸを越えない。）同時に比例制御弁（８）、
（９）の開度もＢ　（８１＞　Ｂ　（９１″となり、次
の状態では室内ユニット（８）の側へ痺れる冷媒の流量
を増加させて室内ユニット（２）の側を主に設定温度に
近づけるように動作する。この後室内ユニット（２）の
側の温度が設定値に近づき温度差Ｄ０４）、Ｄ（ｔ５）
関係力”　ＤＱ４）＜Ｄ（１！１９’となれば前記した
動作へ再び移る。以下、上記の動作を繰り返して空調負
荷の大きさと見合った回転数ｆで圧縮機（４）が回転す
るものである。Also, D ($1>0, that is, the temperature difference is □ DO41> D
os □. ;'Sometimes the rotation speed f of the compressor (4) is set to ``f''
= f + α” (however, the rotation speed f
does not exceed f=MAX. ) At the same time, the proportional control valve (8),
The opening degree of (9) becomes B (81 > B (91''), and in the next state, the flow rate of the refrigerant to the indoor unit (8) is increased, and the indoor unit (2) side is mainly brought to the set temperature. After this, the temperature on the indoor unit (2) side approaches the set value, and the temperature difference D04), D(t5)
If the relational force DQ4)<D(1!19'), the operation returns to the above operation.Hereafter, the above operation is repeated and the compressor (4) rotates at a rotation speed f commensurate with the size of the air conditioning load. It is.

尚、温度差がＤＱ４）＜　ＤＱ５１　”　ノ時Ｋ　ＤＤ
！９１７）値カ大きくなってＤ（Ｉｓ＞２″となれば第
２図の流れヌに示すよ５に圧縮機（４）の回転数ｆは’
ｆ＝ＭＡＸ”Ｋ設定される。Furthermore, when the temperature difference is DQ4)<DQ51'', KDD
! 917) If the value D increases and becomes D(Is>2''), the rotational speed f of the compressor (4) becomes '
f=MAX”K is set.

また、圧縮機（４）の回転数（イ）を変えるαの変化率
は回転数ｆが減少方向の時に増加方向の時より大きくな
るようＫしであるため、特に空調負荷の減少時にはすみ
やかに圧縮機（４）の回転数を下げて省エネルギー化を
図れるものである。In addition, the rate of change of α that changes the rotational speed (a) of the compressor (4) is set so that when the rotational speed f is decreasing, it is larger than when it is increasing, so it can be quickly adjusted, especially when the air conditioning load is decreasing. It is possible to save energy by lowering the rotation speed of the compressor (4).

上記実施例では暖房運転について説明しているが、第３
図の特性図を変更すれば冷房運転にも用いることができ
る。In the above embodiment, heating operation is explained, but in the third embodiment,
By changing the characteristic diagram shown in the figure, it can also be used for cooling operation.

（へ）発明の効果 本発明は能力可変型の圧縮機及び室外側熱交換器を有す
る１台の室外ユニッ）Ｋ室内側熱交換器を有する複数台
の室内ユニットを冷媒配管で接続した分離型空気調和機
において、夫々の室内ユニットを設置した空気調和室の
設定値と室温との温度差を検出し、この夫々の温度差を
比較して得られる温度データで圧縮機の能力の増減を行
つ温度データに基づく圧縮機の能力の増加割合と減少割
合とを異ならせたので、空調負荷の大きさに見合った回
転数で圧縮機を連続的に運転することができる。従って
、圧縮機の発停回数を減らし圧縮機の長寿命化を図ると
同時ＶＣ＠度変比変化さい安定した空気調和が行なえる
。さらに圧縮機の回転数を増加する時と減少させる時と
の増減割合いを減少時に大きくなるように変えたので、
空調負荷の小さい時にはすみやかに圧縮機の回転数を減
らして無駄のない、効率の良い運転が行なえるものであ
る。(F) Effects of the Invention The present invention is a separate type in which a plurality of indoor units each having a variable capacity compressor and an outdoor heat exchanger are connected by refrigerant piping. In an air conditioner, the temperature difference between the set value of the air conditioning room where each indoor unit is installed and the room temperature is detected, and the temperature data obtained by comparing these temperature differences is used to increase or decrease the capacity of the compressor. Since the increase rate and decrease rate of the compressor capacity based on the temperature data are made different, the compressor can be continuously operated at a rotation speed commensurate with the size of the air conditioning load. Therefore, by reducing the number of times the compressor starts and stops and extending the life of the compressor, stable air conditioning can be achieved during simultaneous VC@degree ratio changes. Furthermore, we changed the rate of increase/decrease between increasing and decreasing the compressor rotation speed so that it becomes larger when decreasing.
When the air conditioning load is small, the rotation speed of the compressor can be quickly reduced to achieve efficient operation without waste.

【図面の簡単な説明】[Brief explanation of drawings]

第１図は本発明を用いた空気調和機の実施例を示す装置
の概略図、第２図は第１図に示す室外制御部の動作を示
すフローチャート図、第３図は圧縮機の回転数を設定す
る特性図である。 （１）・・・室外ユニット、　＋２１（３）・・・室内
ユニット、（４）・・・圧縮機、　（５）・・・室外側
熱交換器、　ＣＩＩＱｎ・・・室内側熱交換器。 出願人　三洋電機株式会社　外１名 代理人　弁理士　佐　野　靜　夫 第３図 メFig. 1 is a schematic diagram of a device showing an embodiment of an air conditioner using the present invention, Fig. 2 is a flowchart showing the operation of the outdoor control section shown in Fig. 1, and Fig. 3 is the rotation speed of the compressor. FIG. (1)...Outdoor unit, +21 (3)...Indoor unit, (4)...Compressor, (5)...Outdoor heat exchanger, CIIQn...Indoor heat exchanger. Applicant Sanyo Electric Co., Ltd. and one other agent Patent attorney Mamoru Sano (Figure 3)

Claims (1)

【特許請求の範囲】[Claims] （１１能力可変型の圧縮機及び室外側熱交換器を有する
１台の室外ユニットに室内側熱交換器を有する複数台の
室内ユニットを冷媒配管で接続した分離型空気調和機に
おいて、夫々の室内ユニットを設置した空気調和室の設
定値と室温との温度差を検出し、この夫々の温度差を比
較して得られる温度データで圧縮機の能力の増減を行な
うとき、温度データに基づく圧縮機の能力の増加割合と
減少割合とを異ならせたことを特徴とする多室分離型空
気調和機の制御方法。(In a separate air conditioner in which multiple indoor units each having an indoor heat exchanger are connected via refrigerant piping to one outdoor unit having a variable capacity compressor and an outdoor heat exchanger, each indoor When the compressor capacity is increased or decreased based on the temperature data obtained by detecting the temperature difference between the set value and the room temperature in the air conditioning room where the unit is installed and comparing the respective temperature differences, the compressor capacity is increased or decreased based on the temperature data. A method for controlling a multi-room separated air conditioner, characterized in that the rate of increase and rate of decrease in capacity are different.