JPH085128A - Control method for heat storage device - Google Patents
Control method for heat storage deviceInfo
- Publication number
- JPH085128A JPH085128A JP6163256A JP16325694A JPH085128A JP H085128 A JPH085128 A JP H085128A JP 6163256 A JP6163256 A JP 6163256A JP 16325694 A JP16325694 A JP 16325694A JP H085128 A JPH085128 A JP H085128A
- Authority
- JP
- Japan
- Prior art keywords
- heat storage
- storage tank
- antifreeze liquid
- air conditioning
- refrigerator
- 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.)
- Granted
Links
Landscapes
- Other Air-Conditioning Systems (AREA)
- Air Conditioning Control Device (AREA)
Abstract
(57)【要約】
【目的】 簡単・低コストな構成で蓄熱槽内の冷熱を空
調時間終了時に概ね使いきるようにすることのできる蓄
熱装置の制御方法を提供する。
【構成】 内部の蓄熱剤が凝固・融解することで冷熱を
貯蔵・放出する蓄熱槽１と、不凍液を冷却する冷凍機２
と、不凍液と空気とを熱交換して冷風を得る空調負荷４
と、冷凍機、蓄熱槽及び空調負荷間で不凍液を循環させ
るポンプ５と、蓄熱槽に供給される不凍液をバイパス可
能にするバイパス管Ｌ６と、夜間に貯蔵された冷熱を放
出させて冷房を行う昼間運転時に空調負荷に流入する不
凍液の温度を調整するべく蓄熱槽及びバイパス管の各流
量を調整する流量制御手段８とを有する蓄熱装置の制御
方法において、昼間運転時に、記憶手段９に予め設定さ
れた所定の流量パターンにしたがって流量制御手段を作
動させると共に、蓄熱槽に流入する不凍液の温度を所定
値に保持するよう冷凍機を運転するものとする。
(57) [Abstract] [Purpose] To provide a method for controlling a heat storage device, which is capable of making the cold heat in the heat storage tank almost used up at the end of the air conditioning time with a simple and low cost configuration. [Structure] A heat storage tank 1 that stores and releases cold heat by solidifying and melting an internal heat storage agent, and a refrigerator 2 that cools an antifreeze liquid
And an air conditioning load 4 that obtains cold air by exchanging heat between the antifreeze liquid and air
A pump 5 for circulating the antifreeze liquid between the refrigerator, the heat storage tank and the air conditioning load, a bypass pipe L6 for bypassing the antifreeze liquid supplied to the heat storage tank, and cooling by discharging the cold heat stored at night. In a control method of a heat storage device having a flow control means 8 for adjusting respective flow rates of a heat storage tank and a bypass pipe so as to adjust a temperature of an antifreeze liquid flowing into an air conditioning load during a daytime operation, preset in a storage means 9 during a daytime operation. It is assumed that the flow rate control means is operated in accordance with the predetermined flow rate pattern and the refrigerator is operated so as to maintain the temperature of the antifreeze liquid flowing into the heat storage tank at a predetermined value.
Description
【０００１】[0001]
【産業上の利用分野】本発明は、夜間電力を利用して冷
却されて凝固した蓄熱剤の有する冷熱を用いて冷房を行
う蓄熱装置の制御方法に関し、特に電動弁等の流量制御
手段を用いて蓄熱槽による供給冷熱量を調整する蓄熱装
置の制御方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for controlling a heat storage device that cools by using the cold heat of a heat storage agent that has been cooled and solidified by using nighttime electric power, and particularly uses a flow control means such as an electric valve. The present invention relates to a method for controlling a heat storage device that adjusts the amount of cold heat supplied by a heat storage tank.
【０００２】[0002]
【従来の技術】蓄熱装置として、内部に設置された蓄熱
体中の蓄熱剤が凝固・融解することで冷熱を貯蔵・放出
する蓄熱槽を冷凍機と空調負荷との間に設置し、夜間に
冷凍機を稼働させて発生した冷熱を、媒体としての不凍
液を介して蓄熱槽に貯蔵し、翌日昼間の空調時間にこの
蓄熱槽の冷熱を放出して冷房を行うようにしたものが知
られている。2. Description of the Related Art As a heat storage device, a heat storage tank that stores and releases cold heat by solidifying and melting a heat storage agent in a heat storage unit installed inside is installed between a refrigerator and an air conditioning load, and is used at night. It is known that cold heat generated by operating a refrigerator is stored in a heat storage tank via an antifreeze as a medium, and the cold heat of this heat storage tank is released during the daytime air conditioning time on the next day to perform cooling. There is.
【０００３】このような蓄熱装置においては、通常、昼
間運転時においても冷凍機が併用されているが、夜間に
貯蔵された冷熱を翌日昼間の空調時間終了時までに丁度
使いきるように、蓄熱槽及び冷凍機による冷熱の供給割
合を冷房負荷の変動に対応しながら制御するようになっ
ている。これは、空調時間終了時以前に貯蔵された冷熱
がなくなってしまったり、あるいは空調時間終了時にお
いても冷熱が残っていたりすれば、低廉な夜間電力を利
用して低コストに空調を行おうとする蓄熱装置の有効利
用とならないためである。In such a heat storage device, a refrigerator is usually used together during daytime operation, but the heat storage is performed so that the cold heat stored at night is used up by the end of the daytime air conditioning time on the next day. The cooling heat supply ratio by the tank and the refrigerator is controlled in accordance with the fluctuation of the cooling load. This is because if the cold energy stored before the end of the air conditioning time is exhausted, or if the cold energy remains at the end of the air conditioning time, it will attempt to perform air conditioning at low cost by using inexpensive nighttime electricity. This is because the heat storage device is not effectively used.
【０００４】従来、このような蓄熱装置の制御方法とし
ては、例えば、コンピューターで冷凍機の運転を制御す
ると共に、コントローラーで電動弁の開度、つまり流量
を制御して、蓄熱槽及び冷凍機による冷熱の供給割合を
調整するものが知られている。Conventionally, as a control method of such a heat storage device, for example, a computer controls the operation of the refrigerator and a controller controls the opening degree of the motorized valve, that is, the flow rate, and a heat storage tank and a refrigerator are used. It is known to adjust the supply ratio of cold heat.
【０００５】図６・７は、このような従来の制御方法が
適用された蓄熱装置の概略構成を示している。なお、図
６では昼間運転時、図７では夜間運転時の各作動状況を
併せて示しており、破線部分は不凍液が停止している部
分を示している。FIGS. 6 and 7 show a schematic structure of a heat storage device to which such a conventional control method is applied. It should be noted that FIG. 6 also shows the respective operating states during daytime operation and FIG. 7 during nighttime operation, and the broken line portion shows the portion where the antifreeze liquid is stopped.
【０００６】この蓄熱装置には、内部に設置された蓄熱
体中の蓄熱剤としての水が製氷・解氷することで冷熱を
貯蔵・放出する氷蓄熱槽１と、不凍液を所定温度に冷却
する冷凍機２と、夜間製氷時に氷蓄熱槽１及び冷凍機２
間で不凍液を循環させる製氷ポンプ３と、不凍液と空気
とを熱交換して冷風を得るエアハンドリングユニットま
たはファンコイルユニットからなる空調負荷４と、昼間
解氷時に氷蓄熱槽１、冷凍機２及び空調負荷４間で不凍
液を循環させるブラインポンプ５とが設けられている。
さらに、昼間解氷時において氷蓄熱槽１に供給される不
凍液をバイパス可能にしているバイパス管Ｌ６と、昼間
解氷時において空調負荷４に流入する不凍液の温度を調
整すべく氷蓄熱槽１及びバイパス管Ｌ６の各流量を調整
する流量制御手段としての電動三方弁１３とが設けられ
ている。また、製氷ポンプ３並びにブラインポンプ５に
は、それぞれ逆止弁６・７が設けられている。なお、空
調負荷４の部分は、一旦プレート熱交換器で不凍液と水
とを熱交換した上で空調負荷にその水を供給するように
構成してもよい。[0006] In this heat storage device, water as a heat storage agent in a heat storage unit installed inside ice storage tank 1 for storing and releasing cold heat by ice making and defrosting, and an antifreeze liquid are cooled to a predetermined temperature. Refrigerator 2 and ice heat storage tank 1 and refrigerator 2 during ice making at night
An ice making pump 3 for circulating an antifreeze liquid between them, an air conditioning load 4 consisting of an air handling unit or a fan coil unit for exchanging heat between the antifreeze liquid and air to obtain cool air, an ice heat storage tank 1, a refrigerator 2, and A brine pump 5 that circulates the antifreeze liquid between the air conditioning loads 4 is provided.
Further, the bypass pipe L6 that allows the antifreeze liquid supplied to the ice heat storage tank 1 to be bypassed during the daytime ice-freezing, and the ice heat storage tank 1 and the ice heat storage tank 1 to adjust the temperature of the antifreeze liquid flowing into the air conditioning load 4 during the daytime ice-freezing. An electric three-way valve 13 is provided as a flow rate control unit that adjusts each flow rate of the bypass pipe L6. Further, the ice making pump 3 and the brine pump 5 are provided with check valves 6 and 7, respectively. The portion of the air conditioning load 4 may be configured such that the plate heat exchanger temporarily exchanges heat between the antifreeze liquid and water and then supplies the water to the air conditioning load.
【０００７】冷凍機２の流出口は、配管Ｌ１、電動二方
向弁８及び配管Ｌ２を介して氷蓄熱槽１の上部流出入口
１ｂに接続されている。この電動二方弁８は、タイマー
９により夜間製氷時には全閉され、昼間解氷時には全開
されるようになっている。電動二方向弁８及び配管Ｌ２
間の節点Ｎ１は、冷凍機２と空調負荷４とを連絡する配
管Ｌ４及びＬ５間の節点Ｎ２に、製氷ポンプ３を介して
接続されている。配管Ｌ４には不凍液温度を検出する温
度検出器１１が設けられており、その出力線は冷凍機２
に電気的に接続されている。The outlet of the refrigerator 2 is connected to the upper outlet 1b of the ice heat storage tank 1 via a pipe L1, an electric two-way valve 8 and a pipe L2. The electric two-way valve 8 is fully closed by a timer 9 during nighttime ice making and is fully opened during daytime ice thawing. Electric two-way valve 8 and piping L2
The intervening node N1 is connected via the ice making pump 3 to the node N2 between the pipes L4 and L5 that connect the refrigerator 2 and the air conditioning load 4. The pipe L4 is provided with a temperature detector 11 for detecting the antifreeze temperature, and the output line of the temperature detector 11 is the refrigerator 2.
Electrically connected to.
【０００８】氷蓄熱槽１の下部流出入口１ａは、配管Ｌ
３、電動三方弁１２及びブラインポンプ５を介して空調
負荷４の流入口に接続されている。この電動三方弁１２
のもう一方の口は、配管Ｌ６を介して、配管Ｌ１及び電
動二方向弁８間の節点Ｎ３に接続されている。電動三方
弁１２及びブラインポンプ５間には不凍液温度を検出す
る温度検出器１４が設けられており、その出力線は電動
三方弁１２を作動させるコントローラー１３に電気的に
接続されている。また、氷蓄熱槽１内には残存冷熱量、
例えば残氷量を計測するセンサー１６が設けられてお
り、その出力線は冷凍機２の運転を制御するコンピュー
ター１５に電気的に接続されている。The lower outlet / inlet 1a of the ice heat storage tank 1 has a pipe L
3, the electric three-way valve 12 and the brine pump 5 are connected to the inlet of the air conditioning load 4. This electric three-way valve 12
The other port is connected to a node N3 between the pipe L1 and the electric two-way valve 8 via a pipe L6. A temperature detector 14 that detects the antifreeze temperature is provided between the electric three-way valve 12 and the brine pump 5, and its output line is electrically connected to a controller 13 that operates the electric three-way valve 12. In addition, the amount of residual cold heat in the ice heat storage tank 1,
For example, a sensor 16 that measures the amount of remaining ice is provided, and its output line is electrically connected to a computer 15 that controls the operation of the refrigerator 2.
【０００９】このようにしてなる蓄熱装置において、夜
間製氷時には、図７に示されるように、製氷ポンプ３が
稼働して不凍液が矢印に示すように冷凍機２及び氷蓄熱
槽１間で循環する。このとき、ブラインポンプ５は停止
しており、電動二方向弁８は全閉状態である。製氷ポン
プ３が稼働すると、製氷ポンプ３から吐出した不凍液
は、配管Ｌ４を通って冷凍機１に送られる。ここで所定
温度（例えば−５℃）まで冷却された不凍液は、配管Ｌ
１・Ｌ６、電動三方弁１２及び配管Ｌ３を通って下部流
出入口１ａから氷蓄熱槽１内に流入する。氷蓄熱槽１内
に流入した不凍液は、冷熱を放出して温度０℃近くに上
昇し、上部流出入口１ｂから配管Ｌ２を通って製氷ポン
プ３に戻る。In the heat storage device thus constructed, during ice making at night, as shown in FIG. 7, the ice making pump 3 is operated to circulate the antifreeze liquid between the refrigerator 2 and the ice heat storage tank 1 as shown by the arrow. . At this time, the brine pump 5 is stopped and the electric two-way valve 8 is fully closed. When the ice making pump 3 operates, the antifreezing liquid discharged from the ice making pump 3 is sent to the refrigerator 1 through the pipe L4. Here, the antifreeze liquid cooled to a predetermined temperature (for example, −5 ° C.) is pipe L
1 · L6, the electric three-way valve 12 and the pipe L3 to flow into the ice heat storage tank 1 from the lower outlet 1a. The antifreeze liquid that has flowed into the ice heat storage tank 1 releases cold heat and rises to a temperature near 0 ° C., and returns to the ice making pump 3 from the upper outlet 1b through the pipe L2.
【００１０】一方、昼間解氷時においては、図６に示さ
れるように、ブラインポンプ５が稼働して不凍液が空調
負荷４、冷凍機２及び氷蓄熱槽１間で循環する。電動二
方弁８を全開した状態でブラインポンプ５が稼働する
と、ブラインポンプ５から吐出し空調負荷４を通過した
不凍液は、温度１２℃程度で、配管Ｌ５・Ｌ４を通って
冷凍機２に送られ、ここで所定の中間温度（例えば９
℃）まで冷却される。On the other hand, during the daytime ice thawing, as shown in FIG. 6, the brine pump 5 operates and the antifreeze liquid circulates between the air conditioning load 4, the refrigerator 2 and the ice heat storage tank 1. When the brine pump 5 is operated with the electric two-way valve 8 fully opened, the antifreeze discharged from the brine pump 5 and passing through the air conditioning load 4 is sent to the refrigerator 2 through the pipes L5 and L4 at a temperature of about 12 ° C. At a predetermined intermediate temperature (eg 9
℃).
【００１１】冷凍機２から流出した不凍液は、配管Ｌ１
を通って節点Ｎ３に達し、ここで電動二方向弁８及び配
管Ｌ６の各方向に分流する。電動二方向弁８を通過した
不凍液（流量Ｑ1）は、配管Ｌ２を通って上部流出入口
１ｂから氷蓄熱槽１内に流入し、蓄熱体中の氷を解氷し
ながら温度０℃近くまで冷却される。この不凍液は、下
部流出入口１ａから配管Ｌ３を通って、電動三方弁１２
に流入し、配管Ｌ６を通過した温度９℃の不凍液（流量
Ｑ2）と合流した後ブラインポンプ５に戻る。The antifreeze liquid flowing out from the refrigerator 2 is connected to the pipe L1.
To reach the node N3, where the electric two-way valve 8 and the pipe L6 are branched in each direction. The antifreeze liquid (flow rate Q 1 ) that has passed through the electric two-way valve 8 flows into the ice heat storage tank 1 from the upper outlet 1b through the pipe L2, and while melting the ice in the heat storage body to a temperature close to 0 ° C. To be cooled. This antifreeze liquid flows from the lower outflow port 1a through the pipe L3 to the electric three-way valve 12
Flow into the pipe L6 and join the antifreeze liquid (flow rate Q 2 ) having a temperature of 9 ° C. and then return to the brine pump 5.
【００１２】このとき、電動三方弁１２から流出する不
凍液の温度が温度検出器１４で検出され、その流出温度
を一定（例えば７℃）に保持するよう、コントローラー
１３によって電動三方弁１２の開度、つまり流量Ｑ1・
Ｑ2の割合が制御される。At this time, the temperature of the antifreeze liquid flowing out from the electric three-way valve 12 is detected by the temperature detector 14, and the opening of the electric three-way valve 12 is controlled by the controller 13 so as to keep the temperature of the outflow constant (for example, 7 ° C.). , That is, the flow rate Q 1
The rate of Q 2 is controlled.
【００１３】また、冷凍機２の運転は、氷蓄熱槽１内の
冷熱を空調時間終了時に丁度使いきるように、コンピュ
ーター１５で制御される。すなわち、センサー１６で氷
蓄熱槽１内の残存冷熱量を計測すると共に、冷房負荷の
変動状況から空調時間終了時までの冷房負荷を予測し、
これらに基づいて冷凍機２及び氷蓄熱槽１による冷熱の
供給割合を算出して冷凍機１を運転する。Further, the operation of the refrigerator 2 is controlled by the computer 15 so that the cold heat in the ice heat storage tank 1 can be used up exactly at the end of the air conditioning time. That is, the sensor 16 measures the amount of remaining cold heat in the ice heat storage tank 1, and predicts the cooling load from the change condition of the cooling load until the end of the air conditioning time,
Based on these, the supply ratio of cold heat by the refrigerator 2 and the ice heat storage tank 1 is calculated, and the refrigerator 1 is operated.
【００１４】[0014]
【発明が解決しようとする課題】ところが、このような
従来の制御方法では、氷蓄熱槽１内の残存冷熱量を計測
するセンサー１６や冷凍機２の運転を制御するコンピュ
ーター１５が必要であり、装置が複雑化してコストが増
大するにもかかわらず、制御そのものがあくまで予測に
基づいて行われているため、天候が急変した場合等には
的確に対応できないといった不都合があった。その上、
昼間解氷時の電動三方弁１２による流出温度制御におい
ては、上述のように不凍液温度を７℃に調整するように
すると、冷凍機２から直接流入する不凍液温度９℃との
温度差は僅かに２℃であり、このような微妙な温度調整
をしながら、空調時間終了時に確実に冷熱を使いきるよ
うに制御するのは非常に厄介であり、電動弁の制御性等
からして確実に行うのは困難である。However, such a conventional control method requires a sensor 16 for measuring the amount of cold energy remaining in the ice storage tank 1 and a computer 15 for controlling the operation of the refrigerator 2. Although the device is complicated and the cost is increased, the control itself is performed based on the prediction, so that there is an inconvenience that it is not possible to appropriately cope with a sudden change in the weather. Moreover,
In the outflow temperature control by the electric three-way valve 12 at the time of daytime deicing, if the antifreeze temperature is adjusted to 7 ° C. as described above, the temperature difference from the antifreeze temperature 9 ° C. directly flowing from the refrigerator 2 is slightly increased. Since it is 2 ° C, it is very difficult to control so that the cold heat is completely used up at the end of the air conditioning time while performing such delicate temperature adjustment, and it is surely performed in view of the controllability of the electric valve. Is difficult.
【００１５】本発明は、このような従来技術の不都合を
解消するべく案出されたものであり、その主な目的は、
簡単・低コストな構成で蓄熱槽内の冷熱を空調時間終了
時に概ね使いきるようにすることのできる蓄熱装置の制
御方法を提供することにある。The present invention has been devised in order to eliminate such disadvantages of the prior art, and its main purpose is to:
It is an object of the present invention to provide a method for controlling a heat storage device, which is capable of almost completely using the cold heat in the heat storage tank at the end of the air conditioning time with a simple and low-cost configuration.
【００１６】[0016]
【課題を解決するための手段】上述した目的は、本発明
によれば、内部に設置された蓄熱体中の蓄熱剤が凝固・
融解することで冷熱を貯蔵・放出する蓄熱槽と、不凍液
を冷却する冷凍機と、前記不凍液と空気とを熱交換して
冷風を得る空調負荷と、前記冷凍機、前記蓄熱槽及び前
記空調負荷間で前記不凍液を循環させるポンプと、前記
蓄熱槽に供給される不凍液をバイパス可能にするバイパ
ス管と、夜間に貯蔵された前記蓄熱槽内の冷熱を放出さ
せて冷房を行う昼間運転時において前記空調負荷に流入
する前記不凍液の温度を調整するべく前記蓄熱槽及び前
記バイパス管の各流量を調整する流量制御手段とを有す
る蓄熱装置の制御方法であって、昼間運転時において、
記憶手段に予め設定された所定の流量パターンにしたが
って前記流量制御手段を作動させると共に、前記蓄熱槽
に流入する前記不凍液の温度を所定値に保持するよう前
記冷凍機を運転することを特徴とする蓄熱装置の制御方
法を提供することにより達成される。According to the present invention, the heat storage agent in the heat storage body installed inside solidifies and solidifies the heat storage agent.
A heat storage tank that stores and releases cold heat by melting, a refrigerator that cools an antifreeze liquid, an air conditioning load that obtains cold air by exchanging heat between the antifreeze liquid and air, the refrigerator, the heat storage tank, and the air conditioning load A pump that circulates the antifreeze liquid between the two, a bypass pipe that allows the antifreeze liquid supplied to the heat storage tank to be bypassed, and a daytime operation in which the cold heat in the heat storage tank stored at night is released to perform cooling. A method of controlling a heat storage device having flow control means for adjusting the flow rate of each of the heat storage tank and the bypass pipe in order to adjust the temperature of the antifreeze flowing into an air conditioning load, during daytime operation,
It is characterized in that the flow rate control means is operated in accordance with a predetermined flow rate pattern preset in the storage means, and the refrigerator is operated so as to maintain the temperature of the antifreeze liquid flowing into the heat storage tank at a predetermined value. This is achieved by providing a method of controlling a heat storage device.
【００１７】特に、前記流量パターンが、空調時間内に
おける前記空調負荷にかかる冷房負荷の変動状況に基づ
いて設定されていると好ましい。また、前記流量パター
ンを、昼間運転開始後における前記蓄熱槽から流出する
前記不凍液の温度変化に応じて補正すると良い。Particularly, it is preferable that the flow rate pattern is set on the basis of the variation of the cooling load applied to the air conditioning load during the air conditioning time. Further, the flow rate pattern may be corrected according to the temperature change of the antifreeze solution flowing out from the heat storage tank after the start of daytime operation.
【００１８】[0018]
【作用】昼間運転時に蓄熱槽から流出する不凍液の温度
は蓄熱剤の融点（例えば、蓄熱剤を水とすると略０℃）
で一定であり、蓄熱槽に流入する不凍液の温度を一定に
保持すれば、蓄熱槽から供給される冷熱量は蓄熱槽の流
量を増減することで調整し得る。そこで、夜間に蓄熱槽
に貯蔵された冷熱を空調時間終了時に丁度使いきるよう
に空調時間内の流量パターンを予め設定して、電動二方
弁等の流量制御手段を作動させるタイマー等の記憶手段
にこの流量パターンを記憶させ、これに従って流量制御
手段を作動させると共に、蓄熱槽に流入する不凍液の温
度を所定値に保持するよう冷凍機を自動運転させること
で、貯蔵冷熱を流量パターンに応じて消費し、空調時間
終了時に概ね使いきるようにすることができる。なお、
蓄熱槽により供給されない冷房負荷の不足分は、上記の
ような冷凍機の自動運転で随時補充されることになり、
冷房負荷の変動にも対応することができる。したがっ
て、貯蔵冷熱を空調時間終了時に丁度使いきるように制
御するためのコンピューター等の制御手段や残氷量セン
サー等の計測手段が不要になる。[Function] The temperature of the antifreezing liquid flowing out from the heat storage tank during daytime operation is the melting point of the heat storage agent (for example, approximately 0 ° C. when the heat storage agent is water).
If the temperature of the antifreezing liquid flowing into the heat storage tank is kept constant, the amount of cold heat supplied from the heat storage tank can be adjusted by increasing or decreasing the flow rate of the heat storage tank. Therefore, a storage means such as a timer for presetting a flow rate pattern during the air conditioning time so that the cold heat stored in the heat storage tank at night is completely used up at the end of the air conditioning time, and operating the flow rate control means such as the electric two-way valve. This flow pattern is stored in, the flow control means is operated accordingly, and the refrigerator is automatically operated so as to keep the temperature of the antifreeze liquid flowing into the heat storage tank at a predetermined value, so that the stored cold heat is stored according to the flow pattern. It can be consumed and almost consumed at the end of the air conditioning time. In addition,
The shortage of cooling load that is not supplied by the heat storage tank will be supplemented at any time by the automatic operation of the refrigerator as described above,
It is also possible to cope with fluctuations in the cooling load. Therefore, a control means such as a computer or a measuring means such as a residual ice amount sensor for controlling the stored cold heat to be used up just after the air conditioning time is finished is unnecessary.
【００１９】その上、流量パターンを冷房負荷の変動に
応じて設定すれば、冷凍機が負担する最大冷熱量を小さ
くし得る。また、流量パターンを昼間運転時の蓄熱槽流
出温度の変動に応じて補正すれば、貯蔵冷熱をより一層
精度よく使いきることができるようになる。Furthermore, if the flow rate pattern is set according to the fluctuation of the cooling load, the maximum amount of cold heat that the refrigerator bears can be reduced. Further, if the flow rate pattern is corrected according to the fluctuation of the outflow temperature of the heat storage tank during the daytime operation, the stored cold heat can be used up more accurately.
【００２０】[0020]
【実施例】以下、本発明の好適実施例を添付の図面につ
いて詳しく説明する。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will now be described in detail with reference to the accompanying drawings.
【００２１】図１並びに図２は、本発明による制御方法
が適用された蓄熱装置の概略構成を示すブロック図であ
り、図１では昼間運転時、図２では夜間運転時の各作動
状況を併せて示しており、破線部分は稼働していないこ
とを示している。この蓄熱装置は、図６・７で示される
従来形式の蓄熱装置と比較して、電動三方弁１２、コン
トローラー１３、温度検出器１４及びコンピューター１
５が除去され、代わりに配管Ｌ６中に半固定弁１０が設
置されたものである。この半固定弁１０は、所定の開度
に調整固定されており、配管Ｌ６を通る不凍液に所定の
抵抗を与えるものである。後述する電動二方弁の流量制
御時において、この抵抗により流量Ｑ1・Ｑ2が適切に配
分される。なお、図６・７で説明した従来構成と同一部
分には同一の符号を付してその詳細な説明を省略する。1 and 2 are block diagrams showing a schematic structure of a heat storage device to which the control method according to the present invention is applied. In FIG. 1, operation states during daytime operation and in FIG. 2 during nighttime operation are shown together. The broken line part indicates that it is not operating. This heat storage device has an electric three-way valve 12, a controller 13, a temperature detector 14, and a computer 1 as compared with the conventional type heat storage device shown in FIGS.
5 is removed, and the semi-fixed valve 10 is installed in the pipe L6 instead. The semi-fixed valve 10 is adjusted and fixed to a predetermined opening degree, and gives a predetermined resistance to the antifreeze liquid passing through the pipe L6. During the flow rate control of the electric two-way valve described later, the flow rates Q 1 and Q 2 are appropriately distributed by this resistance. The same parts as those in the conventional configuration described in FIGS. 6 and 7 are designated by the same reference numerals, and detailed description thereof will be omitted.
【００２２】このようにしてなる蓄熱装置において、夜
間運転時には、図２に示されるように、図７に示される
従来形式の蓄熱装置と同様に不凍液が冷凍機２及び氷蓄
熱槽１間で循環する。このとき、タイマー９により電動
二方向弁８が全閉され、ブラインポンプ５は停止してい
る。製氷ポンプ３が稼働すると、製氷ポンプ３から吐出
した不凍液は、配管Ｌ４を通って冷凍機２に送られ、こ
こで所定温度（例えば−５℃）まで冷却され、配管Ｌ
１、調節弁１０及び配管Ｌ３を通って下部流出入口１ａ
から氷蓄熱槽１内に流入する。氷蓄熱槽１内で冷熱を放
出した不凍液は温度０℃で、上部流出入口１ｂから配管
Ｌ２を通って製氷ポンプ３に戻る。In the heat storage device thus constructed, during night operation, as shown in FIG. 2, the antifreeze liquid circulates between the refrigerator 2 and the ice heat storage tank 1 as in the conventional type heat storage device shown in FIG. To do. At this time, the electric two-way valve 8 is fully closed by the timer 9, and the brine pump 5 is stopped. When the ice making pump 3 operates, the antifreezing liquid discharged from the ice making pump 3 is sent to the refrigerator 2 through the pipe L4, where it is cooled to a predetermined temperature (for example, −5 ° C.), and the pipe L
1, the lower valve 1a through the control valve 10 and the pipe L3
Flows into the ice heat storage tank 1. The antifreeze liquid that has released cold heat in the ice heat storage tank 1 has a temperature of 0 ° C. and returns to the ice making pump 3 from the upper outlet 1b through the pipe L2.
【００２３】一方、昼間解氷時においては、図１に示さ
れるように、図６に示される従来形式の蓄熱装置と同様
に、ブラインポンプ５を稼働させて空調負荷４、冷凍機
２及び氷蓄熱槽１間で不凍液を循環させる。なお、冷房
負荷の低い春期及び秋期には、冷凍機２は停止され氷蓄
熱槽１により供給される冷熱だけで冷房が行なわれる場
合もあるが、冷房負荷の高い夏期等通常は冷凍機２が併
用される。On the other hand, at the time of defrosting in the daytime, as shown in FIG. 1, the brine pump 5 is operated to operate the air conditioning load 4, the refrigerator 2 and the ice, as in the conventional type heat storage device shown in FIG. The antifreeze liquid is circulated between the heat storage tanks 1. In the spring and autumn when the cooling load is low, the refrigerator 2 may be stopped and the cooling may be performed only by the cold heat supplied from the ice heat storage tank 1. However, in the summer when the cooling load is high, the refrigerator 2 is normally operated. Used together.
【００２４】製氷ポンプ３を停止した状態でブラインポ
ンプ５を稼働させると、ブラインポンプ５から吐出され
た不凍液は、空調負荷４で冷熱を放出して、配管Ｌ５・
Ｌ４を通って冷凍機２に送られる。冷房負荷の高い夏期
等では、ここで所定の中間温度（例えば９℃）まで冷却
される。When the brine pump 5 is operated while the ice making pump 3 is stopped, the antifreeze liquid discharged from the brine pump 5 releases cold heat in the air conditioning load 4 and the pipe L5.
It is sent to the refrigerator 2 through L4. In the summer season when the cooling load is high, the temperature is cooled to a predetermined intermediate temperature (for example, 9 ° C.).
【００２５】冷凍機２から流出した不凍液は、配管Ｌ１
を通って節点Ｎ３に達し、ここで電動二方向弁８及び半
固定弁１０の各方向に分流する。電動二方向弁８を通過
した不凍液（流量Ｑ1）は、配管Ｌ２を通って上部流出
入口１ｂから氷蓄熱槽１内に流入し、蓄熱体から冷熱を
吸収して温度０℃近くまで冷却される。この不凍液は、
下部流出入口１ａから配管Ｌ３を通って節点Ｎ４に達
し、半固定弁１０を通過した温度９℃の不凍液（流量Ｑ
2）と合流した後ブラインポンプ５に戻る。The antifreeze liquid flowing out from the refrigerator 2 is connected to the pipe L1.
To reach the node N3, where the electric two-way valve 8 and the semi-fixed valve 10 are branched in each direction. The antifreeze liquid (flow rate Q 1 ) which has passed through the electric two-way valve 8 flows into the ice heat storage tank 1 through the upper outlet 1b through the pipe L2, absorbs the cold heat from the heat storage body, and is cooled to a temperature close to 0 ° C. It This antifreeze is
The antifreeze liquid at a temperature of 9 ° C. (flow rate Q) that has reached the node N4 from the lower outflow inlet 1a through the pipe L3 and passed through the semi-fixed valve 10.
2 ) It merges with and returns to the brine pump 5.
【００２６】このとき、夜間製氷時に氷蓄熱槽１に貯蔵
された冷熱を空調時間終了時に概ね使いきるように、氷
蓄熱槽１により供給される冷熱量を調整する。空調負荷
４にかかる冷房負荷は、図３の負荷曲線で示されるよう
に、空調時間内で大きく変動するので、冷房負荷の大き
い時間帯には氷蓄熱槽１からの供給冷熱量を大きくす
る。例えば、１日の平均負荷がピーク時の８５％とする
と、冷房負荷がこの平均負荷よりも大きい高負荷時に
は、ピーク負荷から冷凍機２の冷却能力（例えば、ピー
ク負荷の６０％）を差し引いた冷熱量（例えば、ピーク
負荷の４０％）が氷蓄熱槽１から一定して供給される。
また、冷房負荷が平均負荷より小さい低負荷時には、平
均負荷から冷凍機２の冷却能力を差し引いた冷熱量（例
えば、ピーク負荷の２５％）が氷蓄熱槽１から一定して
供給される。At this time, the amount of cold heat supplied by the ice heat storage tank 1 is adjusted so that the cold heat stored in the ice heat storage tank 1 during nighttime ice making is almost used up at the end of the air conditioning time. As shown by the load curve in FIG. 3, the cooling load applied to the air conditioning load 4 varies greatly during the air conditioning time. Therefore, the amount of cold heat supplied from the ice storage tank 1 is increased during the period when the cooling load is large. For example, if the daily average load is 85% of the peak load, the cooling capacity of the refrigerator 2 (for example, 60% of the peak load) is subtracted from the peak load when the cooling load is higher than the average load. The amount of cold heat (for example, 40% of the peak load) is constantly supplied from the ice heat storage tank 1.
When the cooling load is lower than the average load, the amount of cold heat (for example, 25% of the peak load) obtained by subtracting the cooling capacity of the refrigerator 2 from the average load is constantly supplied from the ice heat storage tank 1.
【００２７】氷蓄熱槽１から供給される冷熱量は、電動
二方弁８によって流量Ｑ1・Ｑ2を増減することで調整さ
れる。すなわち、下部流出入口１ａから流出する不凍液
の温度である氷蓄熱槽流出温度は略０℃で一定であるた
め、上部流出入口１ｂから流入する不凍液の温度である
氷蓄熱槽流入温度、つまり冷凍機２からの不凍液の流出
温度を一定に保持すれば、氷蓄熱槽１から取り出される
冷熱量は、氷蓄熱槽１に流入する不凍液の流量Ｑ1を増
減することで調整される。そこで、この低負荷時及び高
負荷時に応じて電動二方弁８の開度が２段階に切り替わ
る開度パターンを記憶手段としてのタイマー９に予め設
定しておき、毎日この一定の開度パターンに従って電動
二方弁８を作動させる。The amount of cold heat supplied from the ice heat storage tank 1 is adjusted by increasing or decreasing the flow rates Q 1 and Q 2 by the electric two-way valve 8. That is, since the ice storage tank outflow temperature, which is the temperature of the antifreeze liquid flowing out from the lower outflow inlet 1a, is constant at approximately 0 ° C., the ice storage tank inflow temperature that is the temperature of the antifreeze liquid flowing in from the upper outflow inlet 1b, that is, the refrigerator. If the outflow temperature of the antifreeze liquid from 2 is kept constant, the amount of cold heat extracted from the ice heat storage tank 1 is adjusted by increasing or decreasing the flow rate Q 1 of the antifreeze liquid flowing into the ice heat storage tank 1. Therefore, an opening pattern in which the opening degree of the electric two-way valve 8 is switched in two stages depending on the low load and the high load is set in advance in the timer 9 as a storage means, and according to the constant opening pattern every day. The electric two-way valve 8 is operated.
【００２８】一方、低負荷時において平均負荷に達しな
いとき、あるいは高負荷時においてピーク負荷に達しな
いときは、冷凍機２が自動的に減量運転される。すなわ
ち、温度検出器１１により冷凍機に流入する不凍液の温
度が検出され、この温度と予め設定された所定の中間温
度との温度差に基づいて冷凍機２が部分運転あるいは停
止される。On the other hand, when the average load is not reached at a low load or the peak load is not reached at a high load, the refrigerator 2 is automatically reduced in quantity. That is, the temperature detector 11 detects the temperature of the antifreeze liquid flowing into the refrigerator, and the refrigerator 2 is partially operated or stopped based on the temperature difference between this temperature and a preset intermediate temperature.
【００２９】ところで、氷蓄熱槽流出温度は、図４に示
すように、解氷開始からの経過時間によって若干変動す
る。この図は、解氷時間を１０時間としたときの氷蓄熱
槽流出温度の変動状況を示しており、最初の１時間は０
℃より低く、その後７時間は概ね０℃であり、最後の２
時間は３℃程度に上昇する。そこで、この氷蓄熱槽流出
温度の変動状況をもとに、空調負荷流入温度が一定に保
持されるよう、上記の電動二方弁８の開度パターンを補
正する。結局、電動二方弁８の開度は、例えば図５に示
されるように、必要に応じて４段階または５段階に設定
される。By the way, as shown in FIG. 4, the ice storage tank outflow temperature slightly changes depending on the elapsed time from the start of the melting. This figure shows the fluctuation of the outflow temperature of the ice storage tank when the defrosting time is set to 10 hours.
Below 0 ° C, then at 0 ° C for the next 7 hours, the last 2
The time rises to around 3 ° C. Therefore, the opening pattern of the electric two-way valve 8 is corrected so that the air-conditioning load inflow temperature is kept constant based on the variation of the ice heat storage tank outflow temperature. After all, the opening degree of the electric two-way valve 8 is set to four stages or five stages as needed, as shown in FIG. 5, for example.
【００３０】なお、本実施例においては、冷房負荷の変
動に対応するものとして、図３に示されるように、冷房
負荷の変動に応じて低負荷時及び高負荷時の２段階に電
動二方弁８の開度を設定するようにしたが、本発明はこ
れに限るものではなく、さらに細分化して開度を設定す
るようにしても良い。It should be noted that, in the present embodiment, in order to deal with the fluctuation of the cooling load, as shown in FIG. 3, the electric two-way operation is performed in two stages depending on the fluctuation of the cooling load, that is, the low load and the high load. Although the opening of the valve 8 is set, the present invention is not limited to this, and the opening may be set by further subdividing.
【００３１】また、本実施例では、氷蓄熱装置、すなわ
ち蓄熱剤として水を用いたものを示したが、本発明はこ
れに限るものではなく、水に各種添加物を混入した混合
液、例えばエチレングリコール等の希薄水溶液は勿論の
こと、融点が空調温度以下になる物質であれば特に限定
されない。Further, in the present embodiment, the ice heat storage device, that is, the one using water as the heat storage agent is shown, but the present invention is not limited to this, and a mixed liquid in which various additives are mixed in water, for example, Not to mention a dilute aqueous solution of ethylene glycol or the like, there is no particular limitation as long as the substance has a melting point not higher than the air conditioning temperature.
【００３２】[0032]
【発明の効果】以上の説明により明らかなように、本発
明による蓄熱装置の制御方法によれば、電動二方弁等の
流量制御手段をタイマー等の記憶手段に記憶された流量
パターンに従って作動させると共に、蓄熱槽に流入する
不凍液の温度を所定値に保持するよう冷凍機を自動運転
させるだけで、空調時間終了時に貯蔵された冷熱を概ね
使いきるようにすることができ、特に空調負荷流入温度
や供給冷熱量の制御のために高価なコンピューター等の
制御手段や計測手段を設ける必要がなく、コストを大幅
に低減し得る。As is apparent from the above description, according to the control method of the heat storage device of the present invention, the flow rate control means such as the electric two-way valve is operated according to the flow rate pattern stored in the storage means such as the timer. At the same time, by simply operating the refrigerator automatically to keep the temperature of the antifreeze flowing into the heat storage tank at a predetermined value, the cold heat stored at the end of the air conditioning time can be used up almost. It is not necessary to provide expensive control means such as a computer or measuring means for controlling the amount of supplied cold heat, and the cost can be significantly reduced.
【００３３】特に、流量パターンを冷房負荷の変動に応
じて設定すれば、冷凍機を小型化し得るため、設置費や
電力料金等のコストを低減し得る。また、流量パターン
を昼間運転時の蓄熱槽流出温度の変化に応じて補正すれ
ば、貯蔵冷熱をより精度よく使いきることができる。In particular, if the flow rate pattern is set according to the fluctuation of the cooling load, the refrigerator can be downsized, and the installation cost and the power charge can be reduced. In addition, if the flow rate pattern is corrected according to the change in the outflow temperature of the heat storage tank during the daytime operation, the stored cold heat can be used up more accurately.
【図１】本発明が適用された蓄熱装置の概略構成及び昼
間解氷時の作動状況を示すブロック図。FIG. 1 is a block diagram showing a schematic configuration of a heat storage device to which the present invention is applied and an operation state during daytime defrosting.
【図２】夜間製氷時の作動状況を示す図１と同様のブロ
ック図。FIG. 2 is a block diagram similar to FIG. 1, showing an operating condition during nighttime ice making.
【図３】冷凍機及び氷蓄熱槽による冷熱量の供給割合を
示すグラフ。FIG. 3 is a graph showing a supply rate of cold heat amount by a refrigerator and an ice heat storage tank.
【図４】昼間解氷時の氷蓄熱槽流出温度の経時変化を示
すグラフ。FIG. 4 is a graph showing changes over time in the temperature of the ice storage tank when the ice is thawed during the day.
【図５】電動二方弁の開度パターンを示すグラフ。FIG. 5 is a graph showing an opening pattern of an electric two-way valve.
【図６】従来の制御方法が適用された蓄熱装置の概略構
成及び昼間解氷時の作動状況を示すブロック図。FIG. 6 is a block diagram showing a schematic configuration of a heat storage device to which a conventional control method is applied and an operation state during daytime deicing.
【図７】夜間解氷時の作動状況を示す図６と同様のブロ
ック図FIG. 7 is a block diagram similar to FIG. 6 showing an operating state during night-time deicing.
１ 氷蓄熱槽 １ａ 下部流出入口 １ｂ 上部流出入口 ２ 冷凍機 ３ 製氷ポンプ ４ 空調負荷 ５ ブラインポンプ ６・７ 逆止弁 ８ 電動二方弁 ９ タイマー １０ 半固定弁 １１ 温度検出器 １２ 電動三方弁 １３ コントローラー １４ 温度検出器 １５ コンピューター １６ センサー 1 Ice heat storage tank 1a Lower outlet / inlet 1b Upper outlet / inlet 2 Refrigerator 3 Ice making pump 4 Air conditioning load 5 Brine pump 6.7 Check valve 8 Electric two-way valve 9 Timer 10 Semi-fixed valve 11 Temperature detector 12 Electric three-way valve 13 Controller 14 Temperature detector 15 Computer 16 Sensor
Claims (3)
凝固・融解することで冷熱を貯蔵・放出する蓄熱槽と、
不凍液を冷却する冷凍機と、前記不凍液と空気とを熱交
換して冷風を得る空調負荷と、前記冷凍機、前記蓄熱槽
及び前記空調負荷間で前記不凍液を循環させるポンプ
と、前記蓄熱槽に供給される不凍液をバイパス可能にす
るバイパス管と、夜間に貯蔵された前記蓄熱槽内の冷熱
を放出させて冷房を行う昼間運転時において前記空調負
荷に流入する前記不凍液の温度を調整するべく前記蓄熱
槽及び前記バイパス管の各流量を調整する流量制御手段
とを有する蓄熱装置の制御方法であって、 昼間運転時において、記憶手段に予め設定された所定の
流量パターンにしたがって前記流量制御手段を作動させ
ると共に、前記蓄熱槽に流入する前記不凍液の温度を所
定値に保持するよう前記冷凍機を運転することを特徴と
する蓄熱装置の制御方法。1. A heat storage tank for storing and releasing cold heat by solidifying and melting a heat storage agent in a heat storage body installed inside,
A refrigerator for cooling the antifreeze liquid, an air conditioning load for exchanging heat between the antifreeze liquid and air to obtain cold air, a pump for circulating the antifreeze liquid between the refrigerator, the heat storage tank and the air conditioning load, and the heat storage tank. Bypass pipe for bypassing the supplied antifreeze liquid, and for adjusting the temperature of the antifreeze liquid flowing into the air conditioning load during the daytime operation of cooling by releasing the cold heat in the heat storage tank stored at night A method for controlling a heat storage device having a heat storage tank and a flow rate control means for adjusting each flow rate of the bypass pipe, wherein during the daytime operation, the flow rate control means is controlled in accordance with a predetermined flow rate pattern preset in the storage means. A method of controlling a heat storage device, comprising operating the refrigerator so as to keep the temperature of the antifreeze liquid flowing into the heat storage tank at a predetermined value.
ける前記空調負荷にかかる冷房負荷の変動状況に基づい
て設定されていることを特徴とする請求項１に記載の蓄
熱装置の制御方法。2. The method for controlling a heat storage device according to claim 1, wherein the flow rate pattern is set based on a variation condition of a cooling load applied to the air conditioning load during an air conditioning time.
における前記蓄熱槽から流出する前記不凍液の温度変化
に応じて補正することを特徴とする請求項１に記載の蓄
熱装置の制御方法。3. The method for controlling a heat storage device according to claim 1, wherein the flow rate pattern is corrected in accordance with a temperature change of the antifreeze liquid flowing out from the heat storage tank after the start of daytime operation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16325694A JP3432004B2 (en) | 1994-06-22 | 1994-06-22 | Control method of heat storage device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP16325694A JP3432004B2 (en) | 1994-06-22 | 1994-06-22 | Control method of heat storage device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH085128A true JPH085128A (en) | 1996-01-12 |
| JP3432004B2 JP3432004B2 (en) | 2003-07-28 |
Family
ID=15770343
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP16325694A Expired - Fee Related JP3432004B2 (en) | 1994-06-22 | 1994-06-22 | Control method of heat storage device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP3432004B2 (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106575A (en) * | 2001-09-28 | 2003-04-09 | Hitachi Ltd | Ice storage air conditioner |
| CN115524358A (en) * | 2022-10-21 | 2022-12-27 | 比艾克莱检测技术(上海)有限公司 | Cooling liquid device for test and control method thereof |
| CN115654616A (en) * | 2022-11-07 | 2023-01-31 | 珠海格力电器股份有限公司 | A photovoltaic water storage air conditioning system and its control method |
| CN119393841A (en) * | 2024-09-19 | 2025-02-07 | 珠海格力电器股份有限公司 | Indoor refrigeration system, control method and device, electronic device and storage medium |
-
1994
- 1994-06-22 JP JP16325694A patent/JP3432004B2/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2003106575A (en) * | 2001-09-28 | 2003-04-09 | Hitachi Ltd | Ice storage air conditioner |
| CN115524358A (en) * | 2022-10-21 | 2022-12-27 | 比艾克莱检测技术(上海)有限公司 | Cooling liquid device for test and control method thereof |
| CN115654616A (en) * | 2022-11-07 | 2023-01-31 | 珠海格力电器股份有限公司 | A photovoltaic water storage air conditioning system and its control method |
| CN119393841A (en) * | 2024-09-19 | 2025-02-07 | 珠海格力电器股份有限公司 | Indoor refrigeration system, control method and device, electronic device and storage medium |
| CN119393841B (en) * | 2024-09-19 | 2026-05-08 | 珠海格力电器股份有限公司 | Indoor cooling systems, control methods and devices, electronic equipment and storage media |
Also Published As
| Publication number | Publication date |
|---|---|
| JP3432004B2 (en) | 2003-07-28 |
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