JP2689599B2 - Operation control device for air conditioner - Google Patents

Operation control device for air conditioner

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Publication number
JP2689599B2
JP2689599B2 JP1111280A JP11128089A JP2689599B2 JP 2689599 B2 JP2689599 B2 JP 2689599B2 JP 1111280 A JP1111280 A JP 1111280A JP 11128089 A JP11128089 A JP 11128089A JP 2689599 B2 JP2689599 B2 JP 2689599B2
Authority
JP
Japan
Prior art keywords
opening
electric expansion
indoor
stable
initial value
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.)
Expired - Lifetime
Application number
JP1111280A
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Japanese (ja)
Other versions
JPH02287047A (en
Inventor
元 飯田
世紀 井上
寿一 池田
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Daikin Industries Ltd
Original Assignee
Daikin Industries Ltd
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Filing date
Publication date
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Priority to JP1111280A priority Critical patent/JP2689599B2/en
Publication of JPH02287047A publication Critical patent/JPH02287047A/en
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Publication of JP2689599B2 publication Critical patent/JP2689599B2/en
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Expired - Lifetime legal-status Critical Current

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  • Air Conditioning Control Device (AREA)

Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、複数の室内ユニットを備え、各室内電動膨
張弁の初期開度を運転状態に応じて設定するようにした
空気調和装置の運転制御装置に係り、特に運転開始時に
おける開度の安定状態への収束時間の短縮対策に関す
る。
Description: TECHNICAL FIELD The present invention relates to an operation of an air conditioner including a plurality of indoor units, in which an initial opening degree of each indoor electric expansion valve is set according to an operating state. The present invention relates to a control device, and particularly to a measure for shortening the convergence time of the opening degree to a stable state at the start of operation.

(従来の技術) 従来より、例えば特開昭60−178271号公報に開示され
る如く、複数の利用側熱交換器を接続した冷凍装置にお
いて、サーモオンした初回の運転時に、各利用側熱交換
器用の電動膨張弁の開度を所定の初期開度値に設定する
ことにより、初回運転時に各電動膨張弁開度の安定状態
への収束を速くして、制御の安定性の向上を図るものは
公知の技術である。
(Prior Art) Conventionally, in a refrigeration system in which a plurality of heat exchangers on the use side are connected, as disclosed in, for example, Japanese Patent Application Laid-Open No. 60-178271, for each heat exchanger on the use side at the time of first operation with thermo-on. By setting the opening degree of each electric expansion valve to a predetermined initial opening value, it is possible to speed up the convergence of each electric expansion valve opening to a stable state at the time of the first operation and improve the control stability. This is a known technique.

(発明が解決しようとする課題) ところで、複数の室内ユニットを室外ユニットに接続
した場合、例えば室外側に室内熱交換器用の電動膨張弁
を予め設けて、室内ユニットを現地の状況に応じて取付
けるようにユニット化したものでは、取付ける室内ユニ
ットの種類、大きさ等により制御すべき電動膨張弁の開
度が異なる。したがって、例えば、第7図に示すよう
に、予め設定された初期値poとその状況で定まる安定値
p1との間に差があると、サーモオンtoから安定値に収束
するまで相当の時間が掛ることとなって、空調の快適性
を損ずることになる。
(Problems to be Solved by the Invention) By the way, when a plurality of indoor units are connected to an outdoor unit, for example, an electric expansion valve for an indoor heat exchanger is provided in advance on the outdoor side, and the indoor unit is attached according to the local situation. In such a unit, the opening degree of the electric expansion valve to be controlled differs depending on the type and size of the indoor unit to be attached. Therefore, for example, as shown in FIG. 7, a preset initial value po and a stable value determined by the situation
If there is a difference from p1, it will take a considerable amount of time from the thermo-on to converge to a stable value, and the comfort of air conditioning will be impaired.

本発明は斯かる点に鑑みてなされたものであり、その
目的は、初回の運転時における開度の安定値を学習して
初期値を補正する機能を付与することにより、安定した
制御状態への収束時間の短縮を図ることにある。
The present invention has been made in view of such a point, and an object thereof is to provide a function of learning a stable value of the opening degree at the time of the first operation and correcting the initial value, so that a stable control state is achieved. The goal is to reduce the convergence time of.

(課題を解決するための手段) 上記目的を達成するため第1の解決手段は、第1図に
示すように、圧縮機(1)及び室外熱交換器(3)を有
する室外ユニット(X)に対して、室内熱交換器(7)
を有する複数の室内ユニット(A)〜(C)を互いに並
列に接続するとともに、上記各室内熱交換器(7a)〜
(7c)用の電動膨張弁(6a)〜(6c)を設けてなる冷媒
回路(12)を備えた空気調和装置を前提とする。
(Means for Solving the Problem) A first means for achieving the above object is, as shown in FIG. 1, an outdoor unit (X) having a compressor (1) and an outdoor heat exchanger (3). Against the indoor heat exchanger (7)
A plurality of indoor units (A) to (C) are connected in parallel with each other, and each indoor heat exchanger (7a) to
It is premised on an air conditioner provided with a refrigerant circuit (12) provided with electric expansion valves (6a) to (6c) for (7c).

そして、空気調和装置の運転制御装置として、上記各
室内熱交換器(7a)〜(7c)の負荷状態を検出する負荷
検出手段(Th5a)〜(Th5c)と、該負荷検出手段(Th5
a)〜(Th5c)の出力を受け、各室内熱交換器(7a)〜
(7c)の負荷状態に基づき上記各電動膨張弁(6a)〜
(6c)の目標開度を演算する目標開度演算手段(51)
と、該目標開度演算手段(51)の出力を受け、各電動膨
張弁(6a)〜(6c)の開度が目標開度になるように各電
動膨張弁(6a)〜(6c)の開度を制御する開度制御手段
(52)とを設けるものとする。
Then, as the operation control device of the air conditioner, load detecting means (Th5a) to (Th5c) for detecting the load states of the indoor heat exchangers (7a) to (7c), and the load detecting means (Th5).
a) ~ (Th5c) output, each indoor heat exchanger (7a) ~
Each electric expansion valve (6a) ~
Target opening calculation means (51) for calculating the target opening of (6c)
And receiving the output of the target opening calculation means (51), the electric expansion valves (6a) to (6c) are controlled so that the openings of the electric expansion valves (6a) to (6c) become the target openings. An opening control means (52) for controlling the opening is provided.

また、各室内ユニット(A)が初めてサーモオン状態
になる初回運転開始時を検出する初回運転開始検出手段
(53)と、該初回運転開始検出手段(53)の出力を受
け、各室内ユニット(A)の初回運転開始時、上記各負
荷検出手段(Th5a)〜(Th5c)で検出される各室内内熱
交換器(7a)〜(7c)の負荷状態に基づいて、対応する
各電動膨張弁(6a)〜(6c)の開度を所定の初期値に設
定する初期値設定手段(54)とを設け、さらに、上記初
回運転開始後に初めて上記開度制御手段(52)で制御さ
れる電動膨張弁(Th5)〜(Th5c)の開度が安定したこ
とを検出する開度安定状態検出手段(55)と、該開度安
定状態検出手段(55)の出力を受け、各電動膨張弁(6
a)〜(6c)の開度が安定したときの安定開度値を記憶
する記憶手段(56)と、該記憶手段(56)に記憶される
安定開度値に基づき上記初期値設定手段(54)で設定さ
れる初期値を補正する初期値補正手段(57)とを設ける
構成としたものである。
In addition, the first operation start detection means (53) for detecting the start time of the first operation when each indoor unit (A) is in the thermo-on state for the first time, and the output of the first operation start detection means (53) are received, and each indoor unit (A ), At the start of the first operation, the corresponding electric expansion valves (corresponding to the respective electric expansion valves (based on the load states of the indoor heat exchangers (7a) to (7c) detected by the load detecting means (Th5a) to (Th5c)). An electric expansion controlled by the opening control means (52) for the first time after the start of the initial operation is provided with an initial value setting means (54) for setting the opening degree of 6a) to (6c) to a predetermined initial value. The opening stable state detecting means (55) for detecting that the openings of the valves (Th5) to (Th5c) are stable and the outputs of the stable opening state detecting means (55) are received, and each electric expansion valve (6)
a) to (6c) storing means (56) for storing a stable opening value when the opening is stable; and the initial value setting means (56) based on the stable opening value stored in the storing means (56). An initial value correction means (57) for correcting the initial value set in 54) is provided.

第2の解決手段は、上記第1の解決手段における記憶
手段(56)を各初回運転開始後の安定開度を記憶するも
のとするとともに、初期値補正手段(57)を、各初回運
転開始後の開度の安定状態が所定回数以上検出されたと
きに初期値を補正するものとしたものである。
A second solution means is that the storage means (56) in the first solution means stores the stable opening degree after the start of each initial operation, and the initial value correction means (57) starts each initial operation. The initial value is corrected when the subsequent stable state of the opening degree is detected a predetermined number of times or more.

(作用) 以上の構成により、請求項(1)の発明では、例えば
室内ユニット(A)が初めてサーモオン状態となる初回
運転開始時には、初回運転開始検出手段(53)によりそ
れが検出され、初期値設定手段(54)により、予め設定
された要求負荷と初期値との関係に基づき室内電動膨張
弁(6a)の運転開始時に制御目標とすべき初期値が設定
される。そして、目標開度演算手段(51)により、負荷
検出手段(Th5a)で検出される各室内熱交換器(7a)の
負荷に基づき室内電動膨張弁(6a)の目標開度が演算さ
れ、開度制御手段(52)により、室内電動膨張弁(6a)
の開度がその目標開度になるよう制御され、各室内熱交
換器(7a)において空調負荷に応じた熱交換量が確保さ
れる。
(Operation) According to the invention of claim (1), the initial operation start detecting means (53) detects the initial value when the indoor unit (A) first enters the thermo-ON state, and the initial value is detected. The setting means (54) sets an initial value to be a control target when the operation of the indoor electric expansion valve (6a) is started based on the preset relationship between the required load and the initial value. Then, the target opening degree calculation means (51) calculates the target opening degree of the indoor electric expansion valve (6a) based on the load of each indoor heat exchanger (7a) detected by the load detection means (Th5a), and opens. Indoor expansion valve (6a) by temperature control means (52)
Is controlled to reach the target opening, and the heat exchange amount according to the air conditioning load is secured in each indoor heat exchanger (7a).

その場合、開度安定状態検出手段(55)により、初回
運転開始後に室内電動膨張弁(6a)の開度が初めて安定
したときが検出され、記憶手段(56)により、そのとき
の安定開度値が記憶される。そして、初期値補正手段
(57)により、その記憶された安定開度値に基づき上記
初期値設定手段(54)で設定された初期値が補正される
ので、初回運転開始時の電動膨張弁(6a)開度の初期値
が取付場所や室内熱交換器(7a)の大きさ等の相違に応
じて変化する安定値付近の値に設定されることになり、
室内電動膨張弁(6a)の開度が安定状態に収束する時間
が短縮されることになる。
In that case, the opening degree stable state detecting means (55) detects when the opening degree of the indoor electric expansion valve (6a) stabilizes for the first time after the start of the first operation, and the storing means (56) detects the stable opening degree at that time. The value is stored. Then, the initial value correcting means (57) corrects the initial value set by the initial value setting means (54) based on the stored stable opening value, so that the electric expansion valve ( 6a) The initial value of the opening will be set to a value near a stable value that changes depending on the installation location and the size of the indoor heat exchanger (7a).
This shortens the time required for the opening degree of the indoor electric expansion valve (6a) to converge to a stable state.

請求項(2)の発明では、上記請求項(1)の発明の
作用において、記憶手段(56)により、各初回運転開始
後の安定開度が記憶され、初期値補正手段(57)によ
り、各初回運転開始後に開度の安定状態が所定回数以上
検出されたときに初期値が補正されるので、より安定値
に近い初期値が設定されることになる。
In the invention of claim (2), in the operation of the invention of claim (1), the storage means (56) stores the stable opening degree after the start of each initial operation, and the initial value correction means (57) Since the initial value is corrected when the stable state of the opening degree is detected a predetermined number of times or more after the start of each initial operation, the initial value closer to the stable value is set.

(実施例) 以下、本発明の実施例について、第2図以下の図面に
基づき説明する。
(Example) Hereinafter, an example of the present invention will be described with reference to FIG. 2 and subsequent drawings.

第2図は本発明の実施例に係る空気調和装置の冷媒配
管系統を示し、一台の室外ユニット(X)に三台の室内
ユニット(A)〜(C)が並列に接続されたマルチ形の
構成をしている。
FIG. 2 shows a refrigerant piping system of an air conditioner according to an embodiment of the present invention, which is a multi-type in which one outdoor unit (X) and three indoor units (A) to (C) are connected in parallel. It has a configuration of.

上記室外ユニット(X)において、(1)はインバー
タ(18)により運転周波数が可変に駆動される圧縮機、
(2)は冷房運転時には図中実線のごとく、暖房運転時
には図中破線のごとく切換わって、冷媒の循環方向を正
逆切換える四路切換弁、(3)は室外ファン(3a)を付
設し、冷房運転時には凝縮器として、暖房運転時には蒸
発器として機能する室外熱交換器、(4)は冷房運転時
には冷媒流量を調節し、暖房運転時には冷媒を減圧する
室外電動膨張弁、(4a)は該室外電動膨張弁(4)に並
列に接続された逆止弁、(5)は液冷媒を貯溜するため
のレシーバ、(8)は吸入冷媒中の液冷媒を除去するた
めのアキュムレータであって、上記各機器は主冷媒配管
(9)により、冷媒の流通可能に接続されている。
In the outdoor unit (X), (1) is a compressor whose operating frequency is variably driven by an inverter (18),
(2) is a four-way switching valve for switching the refrigerant circulation direction between forward and reverse by switching as shown by the solid line in the figure during cooling operation and as shown by the broken line in the figure during heating operation, and (3) with an outdoor fan (3a) attached. , An outdoor heat exchanger that functions as a condenser during cooling operation and as an evaporator during heating operation, (4) an outdoor electric expansion valve that adjusts the refrigerant flow rate during cooling operation and depressurizes the refrigerant during heating operation, (4a) A check valve connected in parallel to the outdoor electric expansion valve (4), (5) a receiver for storing liquid refrigerant, and (8) an accumulator for removing liquid refrigerant in suction refrigerant. The above-mentioned devices are connected by a main refrigerant pipe (9) so that the refrigerant can flow.

また、各室内ユニット(A)には、それぞれ室内ファ
ン(13a)を付設してなる一台の室内熱交換器(7a)が
配置されており、該各室内熱交換器(7a)〜(7c)は上
記主冷媒配管(9)の液分岐管(10a)〜(10c)及びガ
ス分岐管(11a)〜(11c)により、互いに並列に接続さ
れている。
Further, each indoor unit (A) is provided with one indoor heat exchanger (7a) provided with an indoor fan (13a), and each indoor heat exchanger (7a) to (7c). ) Are connected in parallel with each other by the liquid branch pipes (10a) to (10c) and the gas branch pipes (11a) to (11c) of the main refrigerant pipe (9).

そして、上記室外ユニット(X)において、上記各液
分岐管(10a)〜(10c)には、それぞれ冷房運転時には
冷媒を減圧し、暖房運転時には上記各室内熱交換器(7
a)〜(7c)への冷媒流量を調節する流量制御弁として
の室内電動膨張弁(6a)〜(6c)が介設されている。
In the outdoor unit (X), the liquid branch pipes (10a) to (10c) depressurize the refrigerant during the cooling operation and the indoor heat exchangers (7) during the heating operation, respectively.
The indoor electric expansion valves (6a) to (6c) are interposed as flow rate control valves for adjusting the refrigerant flow rates to a) to (7c).

以上のように、主冷媒配管(9)と液分岐管(10a)
〜(10c)及びガス分岐管(11a)〜(11c)により、各
機器(1)〜(8)を冷媒の流通可能に接続し、室外ユ
ニット(X)で室外空気との熱交換により得た熱を各室
内ユニット(A)〜(C)の室内空気に放出するように
した主冷媒回路(12)が構成されている。
As described above, the main refrigerant pipe (9) and the liquid branch pipe (10a)
To (10c) and gas branch pipes (11a) to (11c), the respective devices (1) to (8) are connected so that the refrigerant can flow, and the heat is exchanged with the outdoor air in the outdoor unit (X). A main refrigerant circuit (12) is configured to release heat to the indoor air of each indoor unit (A) to (C).

また、(9a)は上記圧縮機(1)の吐出管と吸入管と
を冷媒のバイパス可能に接続する均圧バイパス路であっ
て、該均圧バイパス路(9a)には、キャピラリ(16)と
電磁開閉弁(17)とがそれぞれ直列に介設されている。
すなわち、全室内ユニット(A)〜(C)のサーモオフ
による圧縮機(1)の停止時、電磁開閉弁(17)を開い
て、高圧と低圧とをほぼ均圧にすることにより、圧縮機
(1)の再起動不良を防止するようにしている。なお、
(14),(14)はそれぞれ主冷媒配管(9)の液管及び
ガス管の端部に設けられた手動閉鎖弁である。
Further, (9a) is a pressure equalizing bypass passage that connects the discharge pipe and the suction pipe of the compressor (1) so that the refrigerant can be bypassed, and the capillary (16) is provided in the pressure equalizing bypass passage (9a). And an electromagnetic on-off valve (17) are respectively provided in series.
That is, when the compressor (1) is stopped by thermo-off of all the indoor units (A) to (C), the electromagnetic opening / closing valve (17) is opened to make the high pressure and the low pressure almost equal, thereby making the compressor ( The restart failure of 1) is prevented. In addition,
(14) and (14) are manual shut-off valves provided at the ends of the liquid pipe and the gas pipe of the main refrigerant pipe (9), respectively.

さらに、装置には多くのセンサ類が配置されていて、
(Th1)は吐出管に配置され、吐出管温度を検出するた
めの吐出管センサ、(Th2)は吸入管に配置され、吸入
管温度を検出するための吸入管センサ、(Th3)は室外
熱交換器(3)の温度を検出する室外熱交センサ、(Th
4)は室外ユニット(X)の吸込空気温度から外気温度
を検出する外気温センサ、(Th5a)〜(Th5c)はそれぞ
れ各室内ユニット(A)〜(C)の吸込空気温度から各
室内熱交換器(7a)〜(7c)の負荷状態を検出する負荷
検出手段としての室温センサ、(Th6a)〜(Th6c)はそ
れぞれ室外ユニット(X)の液分岐管(10a)〜(10c)
に配置され、液管温度を検出するための液管センサ、
(Th7a)〜(Th7c)はそれぞれ室外ユニット(X)のガ
ス分岐管(11a)〜(11c)に配置され、ガス管温度を検
出するためのガス管センサ、(Th8a)〜(Th8c)はそれ
ぞれ各室内熱交換器(7a)〜(7c)の温度を検出する室
内熱交温度センサ、(P1)は吐出圧力を検出するための
圧力センサ、(HPS)は高圧が所定の上限値に達すると
作動して圧縮機(1)を異常停止させる保護用の高圧圧
力スイッチである。
In addition, the device has many sensors,
(Th1) is located in the discharge pipe, discharge pipe sensor for detecting discharge pipe temperature, (Th2) is located in suction pipe, suction pipe sensor for detecting suction pipe temperature, (Th3) is outdoor heat An outdoor heat exchange sensor for detecting the temperature of the exchanger (3), (Th
4) is an outside air temperature sensor that detects the outside air temperature from the intake air temperature of the outdoor unit (X), and (Th5a) to (Th5c) are the indoor air exchanges from the intake air temperatures of the indoor units (A) to (C), respectively. Room temperature sensors as load detecting means for detecting the load states of the containers (7a) to (7c), (Th6a) to (Th6c) are liquid branch pipes (10a) to (10c) of the outdoor unit (X), respectively.
A liquid pipe sensor for detecting the temperature of the liquid pipe,
(Th7a) to (Th7c) are respectively arranged in the gas branch pipes (11a) to (11c) of the outdoor unit (X), and the gas pipe sensors for detecting the gas pipe temperature, (Th8a) to (Th8c), respectively. An indoor heat exchanger temperature sensor that detects the temperature of each indoor heat exchanger (7a) to (7c), (P 1 ) is a pressure sensor for detecting the discharge pressure, and (HPS) is a high pressure that reaches a predetermined upper limit value. This is a high pressure pressure switch for protection that operates to abnormally stop the compressor (1).

次に、第3図は室外ユニット(X)の運転を制御する
室外制御装置(20)の内部構成及び室外制御装置(20)
に接続される外部機器を示し、(MC)は上記圧縮機
(1)のモータであって、該モータ(MC)は、リレー
接点(52C−)、ノイズフィルタ(22)、整流回路(2
3)、チョークコイル(24)及び上記インバータ(18)
を順次介して交流三相電源(21)に接続されている。ま
た、(MF1)は室ファン(3a)のモータ、(52C),
(20R2),(20R4)及び(20R5)は、それぞれ上記イン
バータ(18)、電磁開閉弁(17)、四路切換弁(2)等
を作動させる電磁リレーであって、上記各機器はそれぞ
れ上記三相交流電源(21)のうちの単相成分と接続され
るとともに、室外制御装置(20)とも信号の授受可能に
接続されている。ここで、上記室外ファン(3a)のモー
タ(MF1)は、その交流電源との間の接続を二方に切
換え可能になされていて、室外制御装置(20)に内蔵さ
れる電磁リレー(図示せず)の常閉接点(52FH)が接続
されている場合には標準の高風量で、電磁リレーの常開
接点(52FL)が接続された場合には低風量側で、室外フ
ァン(3a)を運転するようになされている。さらに、
(EV0),(EV1)〜(EV3)は、それぞれ上記室外電動
膨張弁(4)及び室内電動膨張弁(6),…の開度調節
機構(図示せず)を駆動するステッピングモータであ
る。上記各外部機器は、室外制御装置(20)に信号の授
受可能に接続されていて、室外制御装置(20)により、
その作動状態を制御するようになされている。
Next, FIG. 3 shows the internal configuration of the outdoor control device (20) for controlling the operation of the outdoor unit (X) and the outdoor control device (20).
Is a motor of the compressor (1), and the motor (MC) is a relay contact (52C- 1 ), a noise filter (22), a rectifier circuit (2).
3), choke coil (24) and above inverter (18)
Are sequentially connected to the AC three-phase power source (21). In addition, (MF1) is the motor of the room fan (3a), (52C),
(20R2), (20R4) and (20R5) are electromagnetic relays for operating the inverter (18), the electromagnetic opening / closing valve (17), the four-way switching valve (2), etc. It is connected to a single-phase component of the three-phase AC power source (21) and is also connected to the outdoor control device (20) so that signals can be exchanged. Here, the motor (MF1) of the outdoor fan (3a) is configured so that the connection with the AC power supply can be switched between two directions, and an electromagnetic relay (not shown) built in the outdoor control device (20). No.) with a normally closed contact (52F H ) connected, the standard high air flow rate, and with the normally open contact (52F L ) of the electromagnetic relay connected, a low air flow side, the outdoor fan (3a ) Is designed to drive. further,
(EV 0 ), (EV 1 ) to (EV 3 ) are stepping motors that drive the opening degree adjusting mechanism (not shown) of the outdoor electric expansion valve (4) and the indoor electric expansion valve (6), respectively. Is. Each of the above external devices is connected to the outdoor control device (20) so that signals can be exchanged, and the outdoor control device (20)
It is designed to control its operating state.

さらに、(63H2)は暖房運転時における高圧制御用の
圧力スイッチであって、該スイッチ(63H2)は接続端子
(CN3)により室外制御装置(20)に信号接続されてい
る。
Further, (63H 2 ) is a pressure switch for high pressure control during heating operation, and the switch (63H 2 ) is signal-connected to the outdoor control device (20) through a connection terminal (CN3).

また、室外制御装置(20)内部において、電磁リレー
の常開接点(RY1)〜(RY4)が単相交流電源に対して並
列に接続されている。これらは順に、電磁リレー(52
C),(20R2),(20R4),及び(20R5)のコイルにそ
れぞれ直列に接続されており、室外制御装置(20)の信
号に応じて開閉されて、上記各電磁リレーをオン・オフ
させるものである。
Further, inside the outdoor control device (20), the normally-open contacts (RY 1 ) to (RY 4 ) of the electromagnetic relay are connected in parallel to the single-phase AC power supply. These are, in turn, electromagnetic relays (52
C), (20R2), (20R4), and (20R5) are respectively connected in series, and they are opened / closed according to the signal of the outdoor control device (20) to turn on / off the above electromagnetic relays. It is a thing.

そして、室外制御装置(20)には、上記室外側の各セ
ンサ(Th1)〜(Th4),(Th6a)〜(Th6c),(Th7a)
〜(Th7c)の信号が入力可能に接続されているととも
に、室内側とのシリアル伝送回路(25)を介して、室内
側の各センサ(Th5a)〜(Th5c),(Th8a)〜(Th8c)
の信号が入力可能になされている。
The outdoor control device (20) includes the outdoor sensors (Th1) to (Th4), (Th6a) to (Th6c), (Th7a).
~ (Th7c) signals are connected so that they can be input, and each indoor sensor (Th5a) ~ (Th5c), (Th8a) ~ (Th8c) is connected via the serial transmission circuit (25) with the indoor side.
The signal of is ready for input.

なお、図中、(26)は、のこぎり波平滑化回路、(2
7)は伝送用同期回路、(28)は装置の保護回路、(63H
1)は装置保護用の高圧圧力スイッチ、(49F)は室外フ
ァン(3a)のモータ(MF1)の保護用サーモスタット、
(CN51)はインバータ(18)の駆動回路(図示せず)に
信号を出力するための出力端子である。
In the figure, (26) is a sawtooth wave smoothing circuit, and (2)
7) is a synchronous circuit for transmission, (28) is a device protection circuit, (63H
1 ) is a high pressure switch for device protection, (49F) is a thermostat for protecting the motor (MF1) of the outdoor fan (3a),
(CN51) is an output terminal for outputting a signal to a drive circuit (not shown) of the inverter (18).

次に、第4図は各室内ユニット(A)〜(C)に配置
される室内制御装置(30)の外部機器との電気接続及び
内部構成を示す。図中、(MF)は室内ファン(13a)の
モータで、単相交流電源を受けて各リレー端子(RYa)
〜(RYc)によって風量の大きい順に弱風「L」と強風
「H」に切換え、暖房運転時のサーモオフ信号が入力さ
れた時等の送風モード時のみ微風「LL」にするようにな
されている。
Next, FIG. 4 shows the electrical connection and the internal configuration of the indoor control device (30) arranged in each indoor unit (A) to (C) with an external device. In the figure, (MF) is the motor of the indoor fan (13a), which receives the single-phase AC power supply and each relay terminal (RYa).
~ (RYc) is used to switch between weak wind "L" and strong wind "H" in descending order of air volume, and to set the light wind "LL" only in the ventilation mode, such as when the thermo-off signal is input during heating operation. .

また、上記室内制御装置(30)には、室温センサ(Th
5)及び室内熱交センサ(Th8)の信号が入力されている
とともに、上記室外制御装置(20)及びリモートコント
ロール装置(RCS)と信号の授受可能に接続されてい
る。
Further, the room control device (30) includes a room temperature sensor (Th
The signals of 5) and the indoor heat exchange sensor (Th8) are input, and the signals are exchanged with the outdoor control device (20) and the remote control device (RCS).

装置の冷房運転時、四路切換弁(2)が第2図中破線
側に切換わり、室外電動膨張弁(4)が開いた状態で、
室内電動膨張弁(6a)〜(6c)の開度を過熱度に応じて
調節しながら運転が行われ、吐出冷媒が室外熱交換器
(3)で凝縮され、各室内電動膨張力(6a)〜(6c)で
減圧されて各室内熱交換器(7a)〜(7c)で蒸発するよ
うに循環する一方、暖房運転時には、四路切換弁(2)
が図中実線側に切換わり、各室内電動膨張弁(6a)〜
(6c)の開度が開き気味の状態で、室外電動膨張弁
(4)の開度を適度に調節しながら運転が行われ、吐出
冷媒が各室内熱交換器(7a)〜(7c)で凝縮され、室外
電動膨張弁(4)で減圧されて室外熱交換器(3)で蒸
発するように循環する。
During the cooling operation of the device, the four-way switching valve (2) is switched to the broken line side in FIG. 2 and the outdoor electric expansion valve (4) is opened,
The operation is performed while adjusting the openings of the indoor electric expansion valves (6a) to (6c) according to the degree of superheat, the discharged refrigerant is condensed in the outdoor heat exchanger (3), and each indoor electric expansion force (6a) ~ (6c) decompress and circulate so as to evaporate in each indoor heat exchanger (7a) ~ (7c), while at the time of heating operation, four-way switching valve (2)
Switches to the solid line side in the figure, and each indoor electric expansion valve (6a)
With the opening of (6c) slightly open, the operation is performed while appropriately adjusting the opening of the outdoor electric expansion valve (4), and the discharged refrigerant is discharged from each indoor heat exchanger (7a) to (7c). It is circulated so that it is condensed, decompressed by the outdoor electric expansion valve (4) and evaporated in the outdoor heat exchanger (3).

ここで、上記室外制御装置(20)により行われる各室
内電動膨張弁(6i)(ただし、i=a〜c)の開度制御
について、第5図のフローチャートに基づき説明する
に、ステップS1で上記室温センサ(Th5i)で検出した室
温Taと設定温度Tsとの偏差(Ta−Ts)として表わされる
負荷ΔTiを入力し、ステップS2でサーモオン状態か否か
を判別して、サーモオンになるまではステップS3で冷房
運転時には室内電動膨張弁(6i)を全閉とし、暖房運転
時には室内電動膨張弁(6i)を小開度に設定するサーモ
オフ制御を行った後、サーモオン状態になるとステップ
S4以下の制御を行う。
Here, the outdoor control unit each indoor electric expansion valves to be performed by (20) (6i) (however, i = a to c) for the opening control of the will be described with reference to the flowchart of FIG. 5, step S 1 in type the load ΔTi expressed as the deviation (Ta-Ts) between the room temperature Ta detected by the temperature sensor (Th5i) and the set temperature Ts, it is determined whether or not thermo state in step S 2, it becomes thermo until the indoor motor-operated expansion valve (6i) and fully closed during the cooling operation in step S 3, the heating operation after the thermo-off control to set the indoor motor-operated expansion valve (6i) in a small opening, at a thermo condition step
Controls S 4 and below.

すなわち、ステップS4で負荷ΔTiを空調負荷係数αi
に換算し、ステップS5で、空調負荷係数αiに室内熱交
換器(7i)の容量で定まる重みCiを乗じることにより、
室内熱交換器(7i)の要求負荷Diを算出する。そして、
ステップS6で初回のサーモオンか否かを判別し、初回の
サーモオンでなければステップS10で、室内負荷に応じ
て室内電動膨張弁(6i)の目標開度Psを演算し、ステッ
プS11で、室内電動膨張弁(6i)の開度がその目標開度P
sになるようPI制御を行う。
That is, in step S 4 , the load ΔTi is changed to the air conditioning load coefficient αi.
In terms of, in step S 5, by multiplying the weights Ci determined in air conditioning load factor αi in a volume of the indoor heat exchanger (7i),
Calculate the required load Di of the indoor heat exchanger (7i). And
It is determined whether or not initial thermo in step S 6, in step S 10 if the thermo-on for the first time, calculates a target opening Ps of the indoor electric expansion valve (6i) according to indoor load, at Step S 11 , The opening of the indoor electric expansion valve (6i) is the target opening P
PI control is performed so that it becomes s.

一方、初回のサーモオン時には、ステップS7で下記表
に基づき初期開度値Poを設定する。
On the other hand, when the thermostat is turned on for the first time, the initial opening value Po is set in step S 7 based on the following table.

(ただし、上記表において、開度Poの値は室内電動膨張
弁(6i)を駆動するパルスモータ(EV)のパルス数を示
す。) 次に、ステップS8で、後述のステップS15で演算した
初期開度値Poの補正値ΔPを減ずることにより初期開度
値Poの補正を行った後、ステップS9で一定時間が経過す
るのを待って、ステップS10,S11で室内電動膨張弁(6
i)の開度の目標開度Psの演算とその目標開度Psに基づ
くPI制御とを行う。
(However, in the above table, the value of opening Po indicates the number of pulses of the pulse motor for driving the indoor electric expansion valve (6i) (EV).) Next, in step S 8, calculated in step S 15 described later after correcting the initial opening value Po by subtracting the correction value ΔP for the initial opening value Po, waiting a predetermined time to elapse in step S 9, the indoor electric expansion in step S 10, S 11 Valve (6
The calculation of the target opening Ps of the opening of i) and the PI control based on the target opening Ps are performed.

そして、ステップS12で、サーモオン後初めて室内電
動膨張弁(6i)の開度が安定したか否かを判別して、初
めて安定したときには、ステップS13でその開度Pnを安
定開度値として記憶しておく。次に、ステップS14で3
回続けて開度が安定しているか否か、つまり上記ステッ
プS13で記憶した前々回、前回及び今回の安定開度値Pn
−2,Pn−1,Pnがいずれも所定のバラツキ範囲に収まって
いるか否かを判別して、3回続けて安定すれば、ステッ
プS15で、予め設定された初期開度値Poからその安定値P
iを減ずることにより、初期開度値Poの補正値ΔPを演
算する。
Then, in step S 12, the first indoor electrical expansion valve after thermo opening of (6i) is determined whether or not stabilized, when the first time stable, the opening Pn as a stable opening value in step S 13 Remember. Next, in step S 14 , 3
Whether the opening degree continues times are stable, i.e. before last stored in step S 13, the previous and current stabilizing opening value Pn
If −2, Pn−1, and Pn are all within the predetermined variation range, and if they are stable for three consecutive times, then in step S 15 , the preset initial opening value Po Stable value P
By reducing i, the correction value ΔP of the initial opening value Po is calculated.

以上のフローにおいて、ステップS10により、室温セ
ンサ(負荷検出手段)(Th5i)の出力を受け、各室内熱
交換器(7i)の負荷状態に基づき上記各案内電動膨張弁
(6i)の目標開度Piを演算する目標開度演算手段(51)
が構成され、ステップS11により、上記目標開度演算手
段(51)の出力を受け、各室内電動膨張弁(6i)の開度
が目標開度Psになるように各室内電動膨張弁(6i)の開
度を制御する開度制御手段(52)が構成されている。ま
た、ステップS6の判別により、各室内ユニット(A)が
初めてサーモオン状態になる初回運転開始時を検出する
初回運転開始検出手段(53)が構成され、ステップS7
より、上記初回運転開始検出手段(53)の出力を受け、
各室内ユニット(A)の初回運転開始時、上記各室温セ
ンサ(Th5i)で検出される各室内熱交換器(7i)の負荷
状態に基づいて、対応する各室内電動膨張弁(6i)の開
度を所定の初期値Poに設定する初期値設定手段(54)が
構成されている。
In the above flow, the step S 10, room temperature sensor (load detecting means) receives the output (Th5i), the target opening of the indoor heat exchangers above each guide electric expansion valve based on the load state of (7i) (6i) Target opening calculation means (51) for calculating degree Pi
In step S 11 , the output of the target opening calculation means (51) is received and each indoor electric expansion valve (6i) is adjusted so that the opening of each indoor electric expansion valve (6i) becomes the target opening Ps. ), The opening control means (52) for controlling the opening is configured. Further, the determination in step S 6, the first operation starting detection means each indoor unit (A) is detected for the first time the first start of operation to be thermo state (53) is constituted by step S 7, the first operation start detection Receiving the output of the means (53),
At the start of the first operation of each indoor unit (A), based on the load state of each indoor heat exchanger (7i) detected by each room temperature sensor (Th5i), the corresponding indoor electric expansion valve (6i) is opened. An initial value setting means (54) for setting the degree to a predetermined initial value Po is configured.

さらに、ステップS12により、初回運転開始後に初め
て上記開度制御手段(51)で制御される室内電動膨張弁
(6i)の開度が安定したことを検出する開度安定状態検
出手段(55)が構成され、ステップS13により、該開度
安定状態検出手段(55)の出力を受け、各室内電動膨張
弁(6i)の開度が安定したときの安定開度値Piを記憶す
る記憶手段(56)が構成され、ステップS8により、該記
憶手段(56)に記憶される安定開度値Piに基づき上記初
期値設定手段(54)で設定される初期値Poを補正する初
期値補正手段(57)が構成されている。
Further, in step S 12, the indoor electric expansion valve which is controlled by the first said opening control means (51) after the first operation start opening stable state detecting means for opening the (6i) is detected to be stable (55) There is constituted by step S 13, receiving the output of the open degree stable state detecting means (55), storage means for opening stores a stable opening value Pi when the stability of the indoor electric expansion valve (6i) (56) is constituted by step S 8, the initial value correction for correcting the initial value Po is set at the initial value setting means (54) based on the stable opening value Pi is stored in the storage means (56) Means (57) are configured.

したがって、請求項(1)の発明では、各室内ユニッ
ト(A)が初めてサーモオン状態となる初回運転開始時
には、初回運転開始検出手段(53)によりそれが検出さ
れ、初期値設定手段(54)により、予め上記表のごとく
設定された要求負荷Diと初期値Poとの関係に基づき室内
電動膨張弁(6i)の運転開始時に制御目標とすべき初期
値Poが設定される。そして、目標開度演算手段(51)に
より、室温センサ(負荷検出手段)(Th5i)で検出され
る各室内熱交換器(7i)の負荷ΔTiに基づき各室内電動
膨張弁(6i)の目標開度Psが演算され、開度制御手段
(52)により、各室内電動膨張弁(6i)の開度が上記目
標開度値Psになるよう例えばPI制御される。しかる後、
開度が安定状態となって、各室内熱交換器(7i)におい
て空調負荷に応じた熱交換量が確保される。
Therefore, according to the invention of claim (1), when the indoor unit (A) first enters the thermo-on state for the first time, the initial operation start detecting means (53) detects it, and the initial value setting means (54). Based on the relationship between the required load Di and the initial value Po set in advance in the above table, the initial value Po that should be the control target when the operation of the indoor electric expansion valve (6i) is started is set. Then, the target opening calculation means (51) opens the target of each indoor electric expansion valve (6i) based on the load ΔTi of each indoor heat exchanger (7i) detected by the room temperature sensor (load detection means) (Th5i). The degree Ps is calculated, and the degree of opening control means (52), for example, performs PI control so that the degree of opening of each indoor electric expansion valve (6i) becomes the target opening value Ps. After a while
The opening degree becomes stable, and the heat exchange amount according to the air conditioning load is secured in each indoor heat exchanger (7i).

その場合、空気調和装置を取付ける場所が各室内熱交
換器(7i)の大きさ,種類等により、本来の初回運転時
における安定開度が上記表のような予め設定された初期
値Poに一致しない場合もありうる。したがって、第7図
に示すように、初回運転開始時刻toから室内電動膨張弁
(6i)の開度が安定するまで相当の時間を要し、空調の
快適性を損ねる虞れが生じうる。
In that case, depending on the size and type of the indoor heat exchanger (7i) where the air conditioner is installed, the original stable opening during the initial operation matches the preset initial value Po as shown in the table above. It may not be possible. Therefore, as shown in FIG. 7, it takes a considerable time from the initial operation start time to until the opening degree of the indoor electric expansion valve (6i) is stabilized, and the comfort of air conditioning may be impaired.

それに対し、本発明では、開度安定状態検出手段(5
5)により、初回運転開始後に室内電動膨張弁(6i)の
開度が初めて安定したときが検出され、記憶手段(56)
により、そのときの安定開度値Piが記憶される。そし
て、初期値補正手段(57)により、その記憶された安定
開度値Piに基づき上記初期値設定手段(54)で設定され
た初期値Poが補正される。すなわち、このような学習機
能により、第6図に示すように、初期開度値Poが装置の
取付け状態等の相違に応じて変化する安定値付近の値に
設定されることになり、運転開始時刻toから室内電動膨
張弁(6i)の開度が安定状態に収束するまでの時間が短
縮されることになる。
On the other hand, in the present invention, the opening stable state detecting means (5
According to 5), it is detected that the opening degree of the indoor electric expansion valve (6i) has stabilized for the first time after the start of the first operation, and the storage means (56)
Thus, the stable opening value Pi at that time is stored. Then, the initial value correction means (57) corrects the initial value Po set by the initial value setting means (54) based on the stored stable opening value Pi. That is, with such a learning function, as shown in FIG. 6, the initial opening value Po is set to a value near a stable value that changes depending on the mounting state of the device, etc. The time from the time to until the opening degree of the indoor electric expansion valve (6i) converges to a stable state is shortened.

請求項(2)の発明では、上記請求項(1)の発明に
おいて、記憶手段(56)により、各初回運転開始後の安
定開度が記憶され、初期値補正手段(57)により、各初
回運転開始後に開度の安定状態が所定回数(例えば上記
実施例では3回)以上検出されたときに、初期値Poが補
正されるので、より安定状態に近い初期値Poが設定され
ることになり、上記請求項(1)の発明の効果をより顕
著に得ることができる。
According to the invention of claim (2), in the invention of claim (1), the stable opening degree after the start of each initial operation is stored by the storage means (56), and each initial opening is corrected by the initial value correction means (57). Since the initial value Po is corrected when the stable state of the opening degree is detected a predetermined number of times (for example, three times in the above embodiment) after the start of operation, the initial value Po closer to the stable state is set. Therefore, the effect of the invention of the above-mentioned claim (1) can be obtained more remarkably.

なお、上記実施例では、室内電動膨張弁(6a)〜(6
c)を室外ユニット(X)に設けて室外ユニット(X)
をユニット化した空気調和装置を例にとったが、本発明
は、そのようなものに限定されるものではなく、各室内
ユニットに室内電動膨張弁を配置したような空気調和装
置についても、同様に適用しうる。ただし、上記実施例
のように、室外ユニット(X)に室内電動膨張弁(6a)
〜(6c)を配置したものでは、室内電動膨張弁(6a)〜
(6c)の大きさが予め設定されているのに対して、室内
ユニット(A)〜(C)の大きさが室内の状態に応じて
変化するので、特に各室内熱交換器(7a)〜(7c)によ
り対応する室内電動膨張弁(6a)〜(5c)の初回運転開
始時における最適な初期開度の差が大きく、よって本発
明はこのような場合に著効を発揮するものである。
In the above embodiment, the indoor electric expansion valves (6a) to (6a).
c) is provided in the outdoor unit (X) to provide the outdoor unit (X)
However, the present invention is not limited to such, and the same applies to an air conditioner in which an indoor electric expansion valve is arranged in each indoor unit. Can be applied to. However, as in the above embodiment, the indoor electric expansion valve (6a) is attached to the outdoor unit (X).
~ (6c) is arranged, indoor electric expansion valve (6a) ~
While the size of (6c) is set in advance, the sizes of the indoor units (A) to (C) change according to the indoor condition, so in particular, each indoor heat exchanger (7a) to (7c) has a large difference in the optimal initial opening degree of the corresponding indoor electric expansion valves (6a) to (5c) at the start of the initial operation, and thus the present invention exerts a remarkable effect in such a case. .

また、室内電動膨張弁(6a)〜(6c)の開度をPI制御
により制御するようにしているが、本発明は、PI制御に
限定されるものではなく、単なる比例制御、PID制御等
にも適用しうることはいうまでもない。
Further, although the opening degree of the indoor electric expansion valves (6a) to (6c) is controlled by PI control, the present invention is not limited to PI control, and can be applied to simple proportional control, PID control, etc. Needless to say, it is also applicable.

(発明の効果) 以上説明したように、請求項(1)の発明によれば、
複数の室内熱交換器を配置した空気調和装置において、
初めてサーモオン状態となる初回運転開始時における電
動膨張弁開度の初期値を予め運転条件に対応して定めら
れた値に設定するとともに、初回運転開始後に初めて電
動膨張弁開度が安定するときを検出してその安定値を記
憶しておき、その安定値に基づき初期値を補正するよう
にしたので、装置の取付け場所や室内熱交換器の大きさ
等の取付け条件に応じて、初期値を適切な値に設定する
ことができ、よって、サーモオン時等の運転開始時にお
ける制御安定状態への収束時間の短縮を図ることができ
る。
(Effect of the Invention) As described above, according to the invention of claim (1),
In an air conditioner in which a plurality of indoor heat exchangers are arranged,
When the initial value of the electric expansion valve opening at the start of the first operation that enters the thermo-on state for the first time is set to a value that has been determined in advance corresponding to the operating conditions, and when the electric expansion valve opening becomes stable for the first time after the start of the first operation. Since the stable value is detected and stored, and the initial value is corrected based on the stable value, the initial value can be changed according to the installation conditions such as the installation location of the device and the size of the indoor heat exchanger. The value can be set to an appropriate value, and therefore, it is possible to shorten the convergence time to the stable control state at the start of operation such as when the thermostat is turned on.

請求項(2)の発明によれば、上記請求項(1)の発
明において、各初回運転開始時の安定開度を記憶して、
その値が所定回数以上安定したときに初期値を補正する
ようにしたので、より確実な安定開度値に基づき初期値
を補正することができ、よって、請求項(1)の発明の
効果をより顕著に得ることができる。
According to the invention of claim (2), in the invention of claim (1), the stable opening degree at the start of each initial operation is stored,
Since the initial value is corrected when the value stabilizes for a predetermined number of times or more, the initial value can be corrected based on a more reliable stable opening value. Therefore, the effect of the invention of claim (1) can be obtained. It can be obtained more significantly.

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

第1図は本発明の構成を示すブロック図である。第2図
〜第6図は本発明の実施例を示し、第2図は空気調和装
置の冷媒配管系統図、第3図は室外制御装置の電気回路
図、第4図は室内制御装置の電気回路図、第5図は室内
制御装置による室内電動膨張弁開度の制御内容を示すフ
ローチャート図、第6図は本発明による開度の収束状態
を示す特性図である。第7図は従来の装置による開度の
収束状態を示す特性図である。 1……圧縮機 3……室外熱交換器 6……室内電動膨張弁 7……室内熱交換器 12……冷媒回路 Th5……室温センサ(負荷検出手段) 51……目標開度演算手段 52……開度制御手段 53……初回運転開始検出手段 54……初期値設定手段 55……開度安定状態検出手段 56……記憶手段 57……初期値補正手段 A〜C……室内ユニット X……室外ユニット
FIG. 1 is a block diagram showing the configuration of the present invention. 2 to 6 show an embodiment of the present invention, FIG. 2 is a refrigerant piping system diagram of an air conditioner, FIG. 3 is an electric circuit diagram of an outdoor control device, and FIG. 4 is an electrical diagram of an indoor control device. FIG. 5 is a circuit diagram, FIG. 5 is a flow chart showing the control contents of the indoor electric expansion valve opening degree by the indoor control device, and FIG. 6 is a characteristic diagram showing the opening convergence state according to the present invention. FIG. 7 is a characteristic diagram showing a convergence state of the opening degree by the conventional device. 1 ... Compressor 3 ... Outdoor heat exchanger 6 ... Indoor electric expansion valve 7 ... Indoor heat exchanger 12 ... Refrigerant circuit Th5 ... Room temperature sensor (load detection means) 51 ... Target opening degree calculation means 52 …… Opening control means 53 …… First operation start detection means 54 …… Initial value setting means 55 …… Opening stable state detection means 56 …… Memory means 57 …… Initial value correction means A to C …… Indoor unit X ...... Outdoor unit

───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭60−185076(JP,A) 特開 昭60−178271(JP,A) ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-60-185076 (JP, A) JP-A-60-178271 (JP, A)

Claims (2)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】圧縮機(1)及び室外熱交換器(3)を有
する室外ユニット(X)に対して、室内熱交換器(7)
を有する複数の室内ユニット(A)〜(C)を互いに並
列に接続するとともに、上記各室内燃交換器(7a)〜
(7c)用の電動膨張弁(6a)〜(6c)を設けてなる冷媒
回路(12)を備えた空気調和装置において、 上記各室内熱交換器(7a)〜(7c)の負荷状態を検出す
る負荷検出手段(Th5a)〜(Th5c)と、該負荷検出手段
(Th5a)〜(Th5c)の出力を受け、各室内熱交換器(7
a)〜(7c)の負荷状態に基づき上記各電動膨張弁(6
a)〜(6c)の目標開度を演算する目標開度演算手段(5
1)と、該目標開度演算手段(51)の出力を受け、各電
動膨張弁 (6a)〜(6c)の開度が目標開度になるように各電動膨
張弁(6a)〜(6c)の開度を制御する開度制御手段(5
2)とを備える一方、 各室内ユニット(A)が初めてサーモオン状態になる初
回運転開始時を検出する初回運転開始検出手段(53)
と、該初回運転開始検出手段(53)の出力を受け、各室
内ユニット(A)の初回運転開始時、上記各負荷検出手
段(Th5a)〜(Th5c)で検出される各室内熱交換器(7
a)〜(7c)の負荷状態に基づいて、対応する各電動膨
張弁(6a)〜(6c)の開度を所定の初期値に設定する初
期値設定手段(54)とを備えるとともに、 上記初回運転開始後に初めて上記開度制御手段(52)で
制御される電動膨張弁(Th5)〜(Th5c)の開度が安定
したことを検出する開度安定状態検出手段(55)と、該
開度安定状態検出手段(55)の出力を受け、各電動膨張
弁(6a)〜(6c)の開度が安定したときの安定開度値を
記憶する記憶手段(56)と、該記憶手段(56)に記憶さ
れる安定開度値に基づき上記初期設定手段(54)で設定
される初期値を補正する初期値補正手段(57)とを備え
たことを特徴とする空気調和装置の運転制御装置。
1. An indoor heat exchanger (7) for an outdoor unit (X) having a compressor (1) and an outdoor heat exchanger (3).
A plurality of indoor units (A) to (C) having a plurality of units are connected in parallel to each other,
In an air conditioner equipped with a refrigerant circuit (12) provided with electric expansion valves (6a) to (6c) for (7c), the load states of the indoor heat exchangers (7a) to (7c) are detected. Load detection means (Th5a) to (Th5c) and the outputs of the load detection means (Th5a) to (Th5c), and each indoor heat exchanger (7
Based on the load states of a) to (7c), the above-mentioned electric expansion valves (6
a) to (6c) target opening calculation means (5
1) and the output of the target opening degree calculation means (51), the electric expansion valves (6a) to (6c) are controlled so that the openings of the electric expansion valves (6a) to (6c) become the target openings. ) Opening control means (5
2) and the first operation start detection means (53) for detecting the first operation start time when each indoor unit (A) is in the thermo-on state for the first time.
And the indoor heat exchangers (Th5a) to (Th5c) detected by the load detection means (Th5a) to (Th5c) at the start of the first operation of each indoor unit (A), receiving the output of the first operation start detection means (53). 7
a) to (7c), an initial value setting means (54) for setting the opening degree of each of the corresponding electric expansion valves (6a) to (6c) to a predetermined initial value on the basis of the load state, and An opening stable state detecting means (55) for detecting that the opening of the electric expansion valves (Th5) to (Th5c) controlled by the opening control means (52) is stable after the first operation is started, and the opening stable state detecting means (55). Means (56) for storing a stable opening value when the opening of each of the electric expansion valves (6a) to (6c) is stabilized by receiving the output of the degree stable state detecting means (55), and the storing means (56). Operation control of an air conditioner, comprising: an initial value correction means (57) for correcting the initial value set by the initial setting means (54) based on the stable opening value stored in 56). apparatus.
【請求項2】記憶手段(56)は各初回運転開始後の安定
開度を記憶するものであり、初期値補正手段(57)は、
各初回運転開始後の開度の安定状態が所定回数以上検出
されたときに初期値を補正するものであることを特徴と
する請求項(1)記載の空気調和装置の運転制御装置。
2. A storage means (56) stores a stable opening degree after each initial operation is started, and an initial value correction means (57) is
The operation control device for an air conditioner according to claim 1, wherein the initial value is corrected when the stable state of the opening degree after the start of each initial operation is detected a predetermined number of times or more.
JP1111280A 1989-04-27 1989-04-27 Operation control device for air conditioner Expired - Lifetime JP2689599B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1111280A JP2689599B2 (en) 1989-04-27 1989-04-27 Operation control device for air conditioner

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1111280A JP2689599B2 (en) 1989-04-27 1989-04-27 Operation control device for air conditioner

Publications (2)

Publication Number Publication Date
JPH02287047A JPH02287047A (en) 1990-11-27
JP2689599B2 true JP2689599B2 (en) 1997-12-10

Family

ID=14557226

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1111280A Expired - Lifetime JP2689599B2 (en) 1989-04-27 1989-04-27 Operation control device for air conditioner

Country Status (1)

Country Link
JP (1) JP2689599B2 (en)

Families Citing this family (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2003254635A (en) * 2002-02-28 2003-09-10 Matsushita Electric Ind Co Ltd Multi-chamber type air conditioner
JP4819385B2 (en) * 2004-08-03 2011-11-24 株式会社鷺宮製作所 Control device for cooling system
JP4898610B2 (en) * 2007-09-12 2012-03-21 三菱重工業株式会社 Valve opening pulse setting method for electric expansion valve and multi-type air conditioner
JP5797022B2 (en) * 2011-06-09 2015-10-21 三菱重工業株式会社 Multi-type air conditioner and control method thereof
JP6072565B2 (en) * 2013-02-21 2017-02-01 三菱電機株式会社 Air conditioner
CN105783350B (en) * 2014-12-16 2018-12-18 青岛海尔空调器有限总公司 A kind of control method for electronic expansion valve of air conditioner and device
CN108224856B (en) * 2017-12-30 2020-07-28 广东芬尼克兹节能设备有限公司 Control method and control device for initial opening degree of electronic expansion valve
CN112902401B (en) * 2021-01-28 2023-08-04 青岛海信日立空调系统有限公司 Air conditioner and electronic expansion valve control method

Also Published As

Publication number Publication date
JPH02287047A (en) 1990-11-27

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