JPH0771836A - Control device for absorption refrigerating machine - Google Patents

Control device for absorption refrigerating machine

Info

Publication number
JPH0771836A
JPH0771836A JP21835493A JP21835493A JPH0771836A JP H0771836 A JPH0771836 A JP H0771836A JP 21835493 A JP21835493 A JP 21835493A JP 21835493 A JP21835493 A JP 21835493A JP H0771836 A JPH0771836 A JP H0771836A
Authority
JP
Japan
Prior art keywords
cold
indoor load
hot water
temperature
indoor
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.)
Pending
Application number
JP21835493A
Other languages
Japanese (ja)
Inventor
Takashi Yamamoto
高司 山本
Yasuo Uraki
泰男 浦木
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.)
Hitachi Ltd
Original Assignee
Hitachi Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Hitachi Ltd filed Critical Hitachi Ltd
Priority to JP21835493A priority Critical patent/JPH0771836A/en
Publication of JPH0771836A publication Critical patent/JPH0771836A/en
Pending legal-status Critical Current

Links

Abstract

PURPOSE:To reduce consumption of energy by taking an indoor load beforehand to provide rise characteristics of a cold and hot water device and remaining capacity thereof at the time of shutdown. CONSTITUTION:An indoor load rate Q is sensed by an indoor load sensor 1 and temperature sensed by a cold and hot water collection temperature sensor 4 is utilized, and when a change in an indoor load occurs, number of devices is determined based on the indoor load, and after the lapse of a predetermined time period, cold and hot water collection temperature is controlled based on the number of devices.

Description

【発明の詳細な説明】Detailed Description of the Invention

【0001】[0001]

【産業上の利用分野】本発明は、小形吸収式冷温水機の
運転台数の制御方法に関する。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling the number of operating small absorption chiller-heaters.

【0002】[0002]

【従来の技術】従来の小形吸収式冷温水機の運転台数制
御方法は、冷温水集合部の温度を検出し、この検出温度
と設定温度の差により、冷温水機の運転台数を決定して
いた。この種の制御方法は、特開昭60−133277号公報に
記載の技術が知られている。
2. Description of the Related Art In the conventional method for controlling the number of operating small absorption chiller-heaters, the number of chiller-heaters operating is determined by detecting the temperature of the cold-hot water collecting portion and the difference between the detected temperature and the set temperature. It was As a control method of this kind, the technique described in JP-A-60-133277 is known.

【0003】[0003]

【発明が解決しようとする課題】上記従来技術は、冷温
水集合部の温度検出装置により検出した冷温水温度によ
り、その温度の設定値との偏差、または、温度匂配によ
り運動台数を決定していた。しかし、吸収式冷温水機
は、吸収液の濃度差により冷凍能力を発揮するため、起
動に10〜20分の時間を要し、停止するためにも、吸
収液の濃度を均一にするため10〜20分の希釈時間が
必要となり、この希釈時間の期間も冷凍能力は発揮され
る。また冷温水集合部の温度しか検出していないため、
室内負荷の変化を知るには、冷温水温度が負荷により変
化するまで待たねばならず、室内負荷の急変に対しては
検出まで時間遅れが発生していた。そのため、室内負荷
が急増した場合には検出の時間遅れと、冷温水機の立ち
上がりの遅れとにより、室内負荷に追従できず、冷凍効
果を発揮できない、また負荷が激減した時にも同様に二
重の時間遅れのために追従できず、エネルギ消費低減の
面で問題となっていた。
In the above-mentioned prior art, the number of exercises is determined by the difference between the cold and hot water temperature detected by the temperature detecting device of the cold and hot water collecting portion and the set value of the temperature or the temperature gradient. Was there. However, since the absorption chiller-heater exerts a refrigerating capacity due to the difference in the concentration of the absorption liquid, it takes 10 to 20 minutes to start, and even if it is stopped, the concentration of the absorption liquid is made uniform. A dilution time of -20 minutes is required, and the refrigerating capacity is exerted during this dilution time. Also, since only the temperature of the cold / hot water collecting part is detected,
In order to know the change in the indoor load, it was necessary to wait until the cold / hot water temperature changed due to the load, and a sudden delay in the indoor load caused a delay in detection. Therefore, if the indoor load suddenly increases, the detection time delay and the delay in the rise of the chiller / hot water generator prevent it from following the indoor load, and the refrigeration effect cannot be exerted. Due to the time delay, it was not possible to follow up, which was a problem in terms of reducing energy consumption.

【0004】本発明の目的は、時間遅れによる不必要な
エネルギ消費を低減し、消費エネルギの低減を図ること
にある。
An object of the present invention is to reduce unnecessary energy consumption due to time delay and to reduce energy consumption.

【0005】[0005]

【課題を解決するための手段】上記目的を解決するため
に、本発明は台数制御装置には、マイクロコントロール
ユニット(以下MCUと称す)を搭載し、また冷温水集
合部の温度検出手段を有する。また室内のファンコイル
ユニット(以下FCUと称す。)と接続され、FCUの
運転状態をFCUの能力により、室内の負荷率を検出す
る装置をもち、この室内負荷検出装置から台数制御装置
は通信により室内負荷を知る。この室内負荷量により台
数制御装置では、冷温水機の運転台数を決定し、各冷温
水機に起動/停止指令を出す。また室内負荷量だけで台
数を決定していても、冷凍能力が発揮されないおそれも
あるため、冷温水集合部の温度も検出してフィードバッ
ク制御も加えるようにする。すなわち、室内負荷の変化
を先取りして運転台数を決定し、負荷量の変化に対する
時間遅れを最小にする。室内負荷が変化して冷温水機の
台数が変化してから一定時間は、その台数で運転し、一
定時間経過後には冷温水集合温度による台数制御を加味
する。
In order to solve the above-mentioned problems, the present invention is equipped with a micro control unit (hereinafter referred to as MCU) in a unit number control device, and has a temperature detecting means for a cold / hot water collecting portion. . It is also connected to an indoor fan coil unit (hereinafter referred to as FCU), and has a device that detects the indoor load factor by the FCU's ability to determine the operating state of the FCU. From this indoor load detection device, the unit control device communicates. Know the indoor load. Based on this indoor load amount, the number-of-units control device determines the operating number of the chiller / heater and issues a start / stop command to each chiller / heater. Further, even if the number of units is determined only by the indoor load amount, there is a possibility that the refrigerating capacity may not be exerted, so the temperature of the cold / hot water collecting unit is also detected and feedback control is also added. That is, the number of operating vehicles is determined in advance of the change in the indoor load, and the time delay with respect to the change in the load amount is minimized. After the indoor load changes and the number of chiller-heaters changes, the number of chiller-heaters is operated for a certain period of time, and after the lapse of a certain period of time, the number-of-units control based on the cold / hot water aggregate temperature is added.

【0006】この運転制御により、室内負荷の変化に早
急に追従し、室内負荷の検出遅れによる制御の追従遅れ
や、不要なエネルギ消費を削減することができる様にし
たものである。
By this operation control, it is possible to promptly follow the change in the indoor load and reduce the control delay due to the detection delay of the indoor load and unnecessary energy consumption.

【0007】[0007]

【作用】台数制御装置は、室内機の負荷量を検出する室
内負荷検出装置と通信により接続されている。この検出
装置より得た室内負荷により室外機の冷温水機の運転台
数を決定し、各冷温水機に起動及び停止指令を出力す
る。室内負荷が変動し、冷温水機の運転台数に変化があ
った場合、一定時間は、室内負荷の運転台数により、冷
温水機を運転する。これにより室内負荷の変化にすばや
く追従することができる。その後室内負荷に変化がなけ
れば冷温水集合部の温度により運転台数を変化させる。
これにより、冷温水機が余剰であれば削除し、足りなけ
れば追加することになり、不要な冷温水機の運転をさけ
ることができる。したがって、室内負荷だけに頼ってい
るだけでないので、安定した冷温水を供給することがで
きる。
The number-of-units control device is connected by communication with the indoor load detection device for detecting the load amount of the indoor unit. The number of operating cold / hot water generators of the outdoor unit is determined by the indoor load obtained from this detection device, and start / stop commands are output to each cold / hot water generator. When the indoor load fluctuates and the number of operating cold / hot water machines changes, the hot / cold water heaters are operated for a certain period of time depending on the number of operating indoor / hot water machines. This makes it possible to quickly follow changes in the indoor load. After that, if there is no change in the indoor load, the number of operating units is changed according to the temperature of the cold / hot water collecting part.
As a result, if the chiller-heater is an excess, it is deleted, and if it is insufficient, it is added, and unnecessary operation of the chiller-heater can be avoided. Therefore, stable cold / warm water can be supplied because it is not only dependent on the indoor load.

【0008】[0008]

【実施例】以下、本発明の一実施例を図1により説明す
る。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIG.

【0009】室内負荷検出装置1は室内機FCU21〜
24と通信線61〜64により接続され、室内機FCU
の運転状態を把握している。また、室内負荷検出装置1
は室内機FCU21〜24の運転能力も入力されてお
り、この能力と運転状態により室内負荷率Q%を情報と
して持っている。台数制御装置3は通信線5を介し、室
内負荷制御装置1と接続され、室内負荷率Q%を知るこ
とができる。台数制御装置3は冷温水機31〜34と通
信線71〜74により接続されており、冷温水機31〜
34に対し起動及び停止指令を出力する。冷温水機31
〜34により生成された冷温水は配管8により室内機へ
と送られる。室内機21〜はこの冷温水と熱交換するこ
とにより、室内の冷房及び暖房をおこなう。すなわち、
冷房の場合を例にあげると、室内機の稼動状態が多けれ
ば、より多く冷水の供給が必要となり冷温水機31〜3
4の運転台数が多く必要となってくる。また、室内負荷
の状態が集合冷温水温度検出器4に現れてくるのには時
間遅れがあるために、室内負荷と先取りする室内負荷検
出装置1が必要となる。
The indoor load detection device 1 is an indoor unit FCU21-
24 is connected by communication lines 61 to 64 to the indoor unit FCU.
Knowing the driving status of. In addition, the indoor load detection device 1
Also inputs the operating capacity of the indoor units FCU21 to 24, and has the indoor load factor Q% as information based on this capacity and the operating state. The number-of-units control device 3 is connected to the indoor load control device 1 via the communication line 5 and can know the indoor load factor Q%. The number-of-units control device 3 is connected to the hot and cold water machines 31 to 34 by communication lines 71 to 74, and the hot and cold water machines 31 to 31 are connected.
The start and stop commands are output to 34. Hot and cold water machine 31
The cold and warm water generated by the above-mentioned components 34 to 34 is sent to the indoor unit through the pipe 8. The indoor units 21 to 21 heat and cool the hot and cold water to cool and heat the room. That is,
Taking the case of cooling as an example, if the operating state of the indoor unit is large, it is necessary to supply more chilled water, and the chilled / hot water generators 31 to 3 are
A large number of 4 vehicles will be required. In addition, since there is a time delay before the state of the indoor load appears in the collective cold / hot water temperature detector 4, the indoor load detection device 1 that preempts the indoor load is required.

【0010】台数制御装置3は、室内負荷検出装置1か
ら負荷率Q%を受けとると、そのQ%により冷温水機の
運転台数と図2により決定する。例えば、室内負荷率が
4<Q<Q5 であった場合、冷温水機台数は、3台運
転となる。その後、室内負荷率Qに変化がないまま一定
時間経過すると、台数制御装置は、集合冷温水温度検出
装置4による検出温度での台数制御に切り替える。すな
わち、冷水集合温度がt2<t<t3となった場合には運
転台数を2台とする。これにより冷温水機の立ち上がり
の性能発揮までの時間遅れを室内負荷先取りによりカバ
ーし、立ち上がってからの不要な台数を、冷水集合温度
による制御によりカバーすることができる。その後、室
内負荷が激減し、Q1 >Qとなると再び室内負荷による
台数制御を実施し、運転台数を1台とする。これにより
停止時の残留能力による余剰冷力を、負荷の変化を先取
りすることにより低減することができる。
When receiving the load factor Q% from the indoor load detection device 1, the unit number control device 3 determines the operating number of the chiller / hot water generator and the operating number according to FIG. For example, if the indoor load factor was Q 4 <Q <Q 5, chiller number becomes three operation. After that, when a certain period of time elapses without changing the indoor load factor Q, the unit number control device switches to unit number control at the temperature detected by the collective cold / hot water temperature detection device 4. That is, when the cold water collecting temperature is t 2 <t <t 3 , the number of operating units is set to two. As a result, it is possible to cover the time delay until the performance of the chiller / hot water generators starts to be exhibited by pre-loading the indoor load, and to cover the unnecessary number after the chillers are started up by the control by the chilled water collective temperature. After that, when the indoor load is drastically reduced and Q 1 > Q, the unit number is controlled again by the indoor load, and the number of operating units is set to one. As a result, the surplus cooling power due to the residual capacity at the time of stop can be reduced by anticipating the change of the load.

【0011】この様に、本実施例によれば室内負荷率に
変化があったときには室内負荷率による台数制御を先取
りし、冷温水機を運転することにより、冷温水機の立ち
上がり特性の悪さ、または、停止時の残留冷力を、カバ
ーすることができる。また一定時間経過後に、冷温水集
合部の温度による台数制御に切り替えることにより、能
力が発揮された冷温水機に対して、余剰な運転を減少さ
せることができ、消費エネルギの低減がはかれる効果が
ある。
As described above, according to this embodiment, when the indoor load factor changes, the control of the number of units based on the indoor load factor is pre-empted and the chiller-heater is operated, so that the start-up characteristics of the chiller-heater are deteriorated. Alternatively, the residual cold power at the time of stoppage can be covered. Also, after a certain period of time, by switching to the unit number control based on the temperature of the cold / hot water collecting part, it is possible to reduce the surplus operation for the cold / hot water machine that has exhibited its ability, and it is possible to reduce the energy consumption. is there.

【0012】また、室内負荷率だけに頼っていると、負
荷が低い時は立ち上げ時、冷温水温度が目標値から大き
く外れている時は、目標値に近づくまでに多大な時間が
かかることになるため、ある温度に達するまでは、接続
台数全てで運転することにする。これによれば、冷温水
集合温度の立ち上がりを早くすることができ、安定な冷
温水を供給することができる。
Further, depending only on the indoor load factor, it takes a lot of time to start up when the load is low and to approach the target value when the cold / hot water temperature is largely deviated from the target value. Therefore, until reaching a certain temperature, we will operate with all connected units. According to this, the rise of the cold / hot water gathering temperature can be accelerated, and stable cold / hot water can be supplied.

【0013】[0013]

【発明の効果】本発明によれば、室内負荷の変化量を先
取りし、フィードフォワードすることにより冷温水機の
立ち上がり特性の悪さ、及び、停止時の残留能力をカバ
ーすることができ、能力が安定した後は、冷水集合温度
による台数制御に移行することにより、不要な冷温水機
の運転を削減できることにより、安定な冷温水の供給、
及び、消費エネルギの低減の面で効果がある。
According to the present invention, it is possible to cover the poor starting characteristics of the chiller / heater and the residual capacity at the time of stoppage by anticipating the amount of change in the indoor load and feeding it forward. After stabilizing, by switching to the unit number control by the cold water collective temperature, it is possible to reduce the unnecessary operation of the cold / hot water machine, so that the stable cold / hot water supply,
In addition, it is effective in reducing energy consumption.

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

【図1】本発明の一実施例を示すブロック図。FIG. 1 is a block diagram showing an embodiment of the present invention.

【図2】室内負荷率と運転台数の相関図。FIG. 2 is a correlation diagram between the indoor load factor and the number of operating vehicles.

【図3】冷温水集合温度と運転台数の相関図。FIG. 3 is a correlation diagram of cold / hot water collective temperature and the number of operating units.

【符号の説明】[Explanation of symbols]

1…室内負荷検出装置、21〜24…室内機(FC
U)、3…台数制御装置、4…集合温度検出器、5…通
信線、61〜64,71〜74…通信線、8…冷温水配
管。
1 ... Indoor load detection device, 21-24 ... Indoor unit (FC
U), 3 ... Number control device, 4 ... Collective temperature detector, 5 ... Communication line, 61-64, 71-74 ... Communication line, 8 ... Cold / hot water pipe.

Claims (1)

【特許請求の範囲】[Claims] 【請求項1】冷温水の集合部の温度を検出する温度検出
装置と、マイクロコントローラを備え、かつ、室内の複
数台のファンコイルユニットの負荷率を測定する機器と
通信により接続され、室内負荷を知ることができる台数
制御装置において、前記室内負荷の変動によるフィード
フォワード制御と、冷温水集合部の温度によるフィード
バック制御を組み合わせて小形吸収式冷凍機の運転台数
を制御することを特徴とする吸収式冷凍機の制御装置。
1. An indoor load, comprising: a temperature detecting device for detecting the temperature of a gathering portion of cold / hot water; and a microcontroller, which is connected by communication with a device for measuring a load factor of a plurality of fan coil units in a room. In a unit number control device capable of knowing the above, the absorption characterized by controlling the number of operating small absorption refrigerators by combining the feedforward control by the fluctuation of the indoor load and the feedback control by the temperature of the cold / hot water collecting part. Control unit of a refrigerator.
JP21835493A 1993-09-02 1993-09-02 Control device for absorption refrigerating machine Pending JPH0771836A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP21835493A JPH0771836A (en) 1993-09-02 1993-09-02 Control device for absorption refrigerating machine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP21835493A JPH0771836A (en) 1993-09-02 1993-09-02 Control device for absorption refrigerating machine

Publications (1)

Publication Number Publication Date
JPH0771836A true JPH0771836A (en) 1995-03-17

Family

ID=16718572

Family Applications (1)

Application Number Title Priority Date Filing Date
JP21835493A Pending JPH0771836A (en) 1993-09-02 1993-09-02 Control device for absorption refrigerating machine

Country Status (1)

Country Link
JP (1) JPH0771836A (en)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013142476A (en) * 2012-01-06 2013-07-22 Orion Machinery Co Ltd Coupled operation method and system for chiller

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2013142476A (en) * 2012-01-06 2013-07-22 Orion Machinery Co Ltd Coupled operation method and system for chiller

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