JPH02219964A - Method for controlling absorption refrigerator - Google Patents
Method for controlling absorption refrigeratorInfo
- Publication number
- JPH02219964A JPH02219964A JP4249989A JP4249989A JPH02219964A JP H02219964 A JPH02219964 A JP H02219964A JP 4249989 A JP4249989 A JP 4249989A JP 4249989 A JP4249989 A JP 4249989A JP H02219964 A JPH02219964 A JP H02219964A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- chilled water
- refrigerant
- control
- water temperature
- 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
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 45
- 238000000034 method Methods 0.000 title claims description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims abstract description 125
- 239000000498 cooling water Substances 0.000 claims abstract description 35
- 238000001816 cooling Methods 0.000 claims abstract description 18
- 239000006096 absorbing agent Substances 0.000 claims abstract description 17
- 238000010438 heat treatment Methods 0.000 claims description 13
- 239000003507 refrigerant Substances 0.000 abstract description 50
- 239000007788 liquid Substances 0.000 abstract description 20
- 230000002745 absorbent Effects 0.000 abstract description 8
- 239000002250 absorbent Substances 0.000 abstract description 8
- 238000001704 evaporation Methods 0.000 abstract description 2
- 230000008020 evaporation Effects 0.000 abstract description 2
- 239000002826 coolant Substances 0.000 description 5
- 230000007423 decrease Effects 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 230000005856 abnormality Effects 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- 230000007257 malfunction Effects 0.000 description 2
- 239000007864 aqueous solution Substances 0.000 description 1
- 230000004397 blinking Effects 0.000 description 1
- 230000009977 dual effect Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 238000009834 vaporization Methods 0.000 description 1
- 230000008016 vaporization Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
（イ）産業上の利用分野
本発明は吸収器等を備えた吸収冷凍機の制御方法に関す
る。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to a method of controlling an absorption refrigerator equipped with an absorber and the like.
（ワ）従来の技術
例えば特開昭５９−１０７１５６号公報には、冷却水の
入口温度と冷却水の出口温度もしくは冷水の出口温度の
一定時間の平均値を求め、冷却水の入口温度を冷却水の
出口温度の平均値もしくは冷水の出口温度の平均値によ
って補正し、補正した冷却水の入口温度に基づいて冷水
の温度の設定値を変更する吸収冷凍機の制御装置が開示
されている。(W) Conventional technology For example, in Japanese Patent Application Laid-Open No. 59-107156, the inlet temperature of the cooling water and the outlet temperature of the cooling water or the average value of the outlet temperature of the chilled water for a certain period of time are determined, and the inlet temperature of the cooling water is determined. A control device for an absorption refrigerator is disclosed that corrects the average value of the outlet temperature of water or the average value of the outlet temperature of cold water and changes the set value of the temperature of the cold water based on the corrected inlet temperature of the cooling water.
（ハ）発明が解決しようとする課題
上記従来の技術において、冷却水の入口温度が低くなっ
た場合に冷水温度の設定値を上げることが可能であるが
、冷却水の入口温度が低くなっているときに、冷水温度
の設定値を高くすると、再生器の加熱量が減少し、冷媒
の蒸発量が少なくなり、又、吸収器の冷媒吸収量が増加
するため吸収液が薄くなり、冷媒量の大幅な不足を招き
、冷媒ポンプのキャビテーション、又は頻繁なオンオフ
等が発生し、冷媒ポンプに故障が発生する虞れがあり、
故障が発生した場合には冷媒ポンプの交換作業等を行わ
なければならない。又、交換作業時に吸収冷凍機内に空
気が侵入し、空気により蒸発器内等に錆が発生し、吸収
冷凍機の寿命が短くなるという問題が発生していた。(c) Problems to be Solved by the Invention In the above-mentioned conventional technology, it is possible to raise the set value of the chilled water temperature when the inlet temperature of the cooling water becomes low. When the set value of the chilled water temperature is increased, the amount of heating in the regenerator decreases, and the amount of evaporation of the refrigerant decreases.Also, the amount of refrigerant absorbed by the absorber increases, making the absorption liquid thinner and reducing the amount of refrigerant. This may lead to a significant shortage of refrigerant pumps, leading to cavitation or frequent on/off of the refrigerant pump, which may result in failure of the refrigerant pump.
If a failure occurs, the refrigerant pump must be replaced. Furthermore, during replacement work, air enters the absorption refrigerator, causing rust in the evaporator and the like, resulting in a problem that the life of the absorption refrigerator is shortened.
本発明は、冷水温度を高く設定したときの冷媒不足を防
止し、冷媒ポンプのキャビテーション等を回避し、長期
間にわたり使用可能な吸収冷凍機を提供することを目的
とする。SUMMARY OF THE INVENTION An object of the present invention is to provide an absorption refrigerator that can prevent refrigerant shortage when the chilled water temperature is set high, avoid cavitation of a refrigerant pump, and can be used for a long period of time.
（ニ）課題を解決するための手段
本発明は上記課題を解決するために、吸収器（５）、再
生器（１）、凝縮器（３）、及び蒸発器（４）をそれぞ
れ配管接続し、空気調和機等に供給する冷水の温度がそ
の設定値に一致するように再生器（１）の加熱量を制御
する吸収冷凍機において、冷却水或いは冷却空気の温度
に基づいて冷水温度の制御範囲を制限する吸収冷凍機の
制御方法を提供するものである。(d) Means for Solving the Problems In order to solve the above problems, the present invention connects the absorber (5), the regenerator (1), the condenser (3), and the evaporator (4) with each other through piping. In an absorption chiller that controls the heating amount of the regenerator (1) so that the temperature of the chilled water supplied to an air conditioner, etc. matches the set value, the chilled water temperature is controlled based on the temperature of the chilled water or cooling air. The present invention provides a control method for an absorption refrigerator that limits the range.
又、吸収器（５）、再生器（１）、凝縮器（３）、及び
蒸発器（４）をそれぞれ配管接続し、空気調和機等に供
給する冷水の温度がその設定値に一致するように再生器
（１）の加熱量を制御する吸収冷凍機において、冷却水
或いは冷却空気の温度に基づいて冷水温度の制御範囲を
制限し、冷水温度設定値が上記制御範囲外のときは冷水
温度を制御範囲の上限値に制御し、かつ、冷水温度設定
値が制御範囲内のときは冷水温度を冷水温度設定値に制
御する吸収冷凍機の制御方法を提供するものである。In addition, the absorber (5), regenerator (1), condenser (3), and evaporator (4) are each connected to the pipes so that the temperature of the cold water supplied to the air conditioner, etc. matches the set value. In an absorption chiller that controls the heating amount of the regenerator (1), the control range of the chilled water temperature is limited based on the temperature of the cooling water or cooling air, and when the chilled water temperature set value is outside the above control range, the chilled water temperature is The present invention provides a method for controlling an absorption chiller that controls the temperature to the upper limit of the control range, and controls the chilled water temperature to the chilled water temperature set value when the chilled water temperature set value is within the control range.
更に吸収器（５）、再生器り１）、凝縮器（３）、及び
蒸発器（４）をそれぞれ配管接続し、空気調和機等に供
給する冷水の温度がその設定値に一致するように再生器
（１）の加熱量を制御する吸収冷凍機において、冷却水
或いは冷却空気の温度に基づいて冷水温度の制御範囲を
制限し、冷水温度設定値が制御範囲外のときは冷水温度
を制御範囲の上限値に制御し、かつ、表示器（３３）を
動作させる吸収冷凍機の制御方法を提供するものである
。Furthermore, the absorber (5), regenerator 1), condenser (3), and evaporator (4) are each connected to the pipes so that the temperature of the cold water supplied to the air conditioner etc. matches the set value. In an absorption chiller that controls the heating amount of the regenerator (1), the control range of the chilled water temperature is limited based on the temperature of the cooling water or cooling air, and the chilled water temperature is controlled when the chilled water temperature set value is outside the control range. A method for controlling an absorption refrigerator is provided which controls the upper limit of the range and operates the indicator (33).
（ホ）作用
吸収冷凍機の冷水温度の制御範囲が冷却水、或いは冷却
空気の温度に基づいて制限され、冷却水、或いは冷却空
気の温度が低いときに、冷水温度が高く制御されること
がなく、冷水温度が低く制御され、再生器（１）の加熱
量が増加し、冷媒の発生量が増加し、蒸発器（４）の冷
媒不足が回避され、冷媒ポンプのキャビテーション等を
防止して故障を防止することができ、吸収冷凍機を長期
間にわたり使用することが可能になる。(e) Effect The control range of the chilled water temperature of the absorption chiller is limited based on the temperature of the cooling water or cooling air, and when the temperature of the cooling water or cooling air is low, the chilled water temperature may be controlled to be high. Therefore, the chilled water temperature is controlled to be low, the amount of heating in the regenerator (1) is increased, the amount of refrigerant generated is increased, a shortage of refrigerant in the evaporator (4) is avoided, and cavitation of the refrigerant pump is prevented. Breakdowns can be prevented and the absorption refrigerator can be used for a long period of time.
又、冷水温度の設定値が、冷却水或いは冷却空気の温度
に基づいて決まる制御範囲外のときには、冷水温度が制
御範囲の上限値に制御され、再生器（１）の冷媒発生量
が増加し、蒸発器（４）の冷媒不足が回避され、冷媒ポ
ンプのキャビテーション等を防止して故障を防止するこ
とができ、吸収冷凍機を長期間にわたり使用することが
可能になり、又、冷却水或いは冷却空気の温度が上昇し
、冷水温度の設定値が制御範囲内にあるときには、冷水
温度が冷水温度設定値に制御され、はぼ設定温度の冷水
を得ることが可能になる。Further, when the set value of the chilled water temperature is outside the control range determined based on the temperature of the cooling water or cooling air, the chilled water temperature is controlled to the upper limit of the control range, and the amount of refrigerant generated by the regenerator (1) increases. , refrigerant shortage in the evaporator (4) is avoided, cavitation of the refrigerant pump can be prevented, and breakdowns can be prevented, and the absorption refrigerator can be used for a long period of time. When the temperature of the cooling air increases and the set value of the chilled water temperature is within the control range, the chilled water temperature is controlled to the set chilled water temperature value, making it possible to obtain chilled water at almost the set temperature.
更に、冷水温度の設定値が冷水温度の制御範囲外のとき
には、冷水温度が制御範囲の上限値に制御されると共に
、表示器（３３）に実際の制御温度が表示されると共に
、設定温度と制御温度とが違うことを表わす記号が表示
され、吸収冷凍機の管理者は、冷水温度が制御範囲の上
限値に制御されていることを知ることができ、故障によ
る冷水温度の制御異常等と冷却水温度の低下により設定
温度と制御温度とが違っていることとを区別することが
可能ｔこなる。Furthermore, when the set value of the chilled water temperature is outside the chilled water temperature control range, the chilled water temperature is controlled to the upper limit of the control range, the actual control temperature is displayed on the display (33), and the set temperature and A symbol indicating that the temperature is different from the control temperature is displayed, allowing the absorption chiller administrator to know that the chilled water temperature is being controlled to the upper limit of the control range, and to prevent abnormalities in the chilled water temperature control due to malfunctions. It becomes possible to distinguish between the set temperature and the control temperature due to a decrease in the cooling water temperature.
（へ）実施例
以下、本発明の一実施例を図面ζこ基づいて詳細に説明
する。(F) Example Hereinafter, an example of the present invention will be described in detail with reference to the drawings.
第１図に示したものは二重効用吸収冷凍機であり、冷媒
に水（Ｈ，Ｏ）、吸収剤（吸収液）に臭化リチウム（Ｌ
ｉＢｒ）水溶液を使用したものである。The one shown in Figure 1 is a dual-effect absorption refrigerator, with water (H, O) used as the refrigerant and lithium bromide (L) used as the absorbent (absorbing liquid).
iBr) using an aqueous solution.
第１図において、（１）はガスバーナ（ＩＢ）を備えた
高温再生器、（２）は低温再生器、（３）は凝縮器、（
４）は蒸発器、（５）は吸収器、（６）は低温熱交換器
、（７）は高温熱交換器、（８）ないしく１２）は吸収
液配管、（１５）は吸収液ポンプ、（１６）ないしく１
８）は冷媒配管、（１９）は冷媒ポンプ、（２０）はガ
スバーナくＩＢ）に接続されたガス配管、（２１）は加
熱量制御弁、（２２）は冷水配管であり、それぞれは第
１図に示したように配管接続されている。又、（２２５
）は冷水配管（２２）に設けられ、冷水の蒸発器出口温
度を検出する冷水出口温度検出器である。又、（２５）
は冷却水配管であり、この冷却水配管（２５）の途中に
は吸収器熱交換器（２６）、及び凝縮器熱交換器（２７
）が設けられている。更に、冷却水配管（２５）の途中
には冷却塔＜２８）、及び冷却水ポンプ（Ｐ）が設けら
れ。In Figure 1, (1) is a high temperature regenerator equipped with a gas burner (IB), (2) is a low temperature regenerator, (3) is a condenser, (
4) is the evaporator, (5) is the absorber, (6) is the low temperature heat exchanger, (7) is the high temperature heat exchanger, (8) or 12) is the absorption liquid piping, and (15) is the absorption liquid pump. , (16) or 1
8) is a refrigerant pipe, (19) is a refrigerant pump, (20) is a gas pipe connected to a gas burner (IB), (21) is a heating amount control valve, and (22) is a cold water pipe, each of which is connected to the first The piping is connected as shown in the figure. Also, (225
) is a cold water outlet temperature detector that is installed in the cold water pipe (22) and detects the cold water evaporator outlet temperature. Also, (25)
is a cooling water pipe, and an absorber heat exchanger (26) and a condenser heat exchanger (27) are installed in the middle of this cooling water pipe (25).
) is provided. Furthermore, a cooling tower <28) and a cooling water pump (P) are provided in the middle of the cooling water pipe (25).
ている。そして、冷却水配管（２５）の吸収器入Ｏ側に
は冷却水入口温度検出器（３０）が設けられている。又
、（３１）は吸収冷凍機の制御盤、（３２）は制御盤（
３１）に設けられ、マイコンにより構成された制御装置
であり、この制御装置（３２）に冷水出口温度検出器（
２２５）、冷却水入口温度検出器（３０）、及び加熱量
制御弁（２１）がそれぞれ接続されている。ing. A cooling water inlet temperature detector (30) is provided on the absorber inlet O side of the cooling water pipe (25). Also, (31) is the control panel of the absorption refrigerator, and (32) is the control panel (
31) is a control device configured by a microcomputer, and this control device (32) is equipped with a chilled water outlet temperature detector (
225), a cooling water inlet temperature detector (30), and a heating amount control valve (21).
上記制御装置（３２）には、第２図に示したよ、うに、
冷却水入口温度に対する冷水出口温度の制御範囲（以下
制御温度範囲という）が記載され、この制御温度範囲の
上限値は冷却水入口温度が２２℃以下の場合は７°Ｃで
あり、２２°Ｃより高くなると冷却水入口温度の上昇に
伴い高くなる。ここで制御温度範囲の下限値は例えば５
°Ｃである。又、制御装置（３２）には管理者が操作す
る冷水温度設定器（４０）が接続されている。そして、
制御装置（３２）で、冷却水入口温度に基づいて冷水の
制御温度範囲が決まり、冷水温度設定器（４０）で設定
された冷水温度が制御装置（３２）で決まった制御温度
範囲外、即ち上限値より高いときには、冷水設定温度が
上限値に制限される。The control device (32) includes, as shown in FIG.
The control range of the chilled water outlet temperature with respect to the cooling water inlet temperature (hereinafter referred to as the control temperature range) is described, and the upper limit of this control temperature range is 7°C when the cooling water inlet temperature is 22°C or less, and 22°C If it becomes higher, it will increase as the cooling water inlet temperature increases. Here, the lower limit of the control temperature range is, for example, 5
It is °C. Further, a cold water temperature setting device (40) operated by an administrator is connected to the control device (32). and,
The control device (32) determines the control temperature range of the chilled water based on the coolant inlet temperature, and if the chilled water temperature set by the chilled water temperature setting device (40) is outside the control temperature range determined by the control device (32), that is, When the temperature is higher than the upper limit, the cold water set temperature is limited to the upper limit.
又、（３３〉は制御盤（３１）に設けられた表示器であ
り、この表示器（３３）は第３図に示したように、例え
ば５桁の７セグメントＬＥＤ（３４）〜（３８）により
構成されている。そして、表示器（３３）には例えば吸
収冷凍機の冷水設定温度等が表示される。Further, (33> is a display provided on the control panel (31), and this display (33) is, for example, a 5-digit 7-segment LED (34) to (38) as shown in FIG. The display device (33) displays, for example, the cold water setting temperature of the absorption refrigerator.
上記吸収冷凍機の運転時、高温再生器（１）で蒸発した
冷媒は低温再生器（２）を経て凝縮器（３）へ流れ、凝
縮器熱交換器（２７）内を流れる水と熱交換して凝縮液
化した後冷媒配管（１７）を介して蒸発器（４）へ流れ
る。そして、冷媒液が冷水配管（２２）内の水と熱交換
して蒸発し、気化熱によって冷水配管（２２）内の水が
冷却きれる。そして、冷水が負荷に循環して冷房運転が
行われる。また、蒸発器（４〉で蒸発した冷媒は吸収器
（５）で吸収液に吸収される。そして、冷媒を吸収して
濃度の薄くなった吸収液が吸収液ポンプ（１５）の運転
により低温熱交換器（６）、高温熱交換器（７）を経て
高温再生器り１）へ送られる。高温再生器（１）に入っ
た吸収液はバーナ（ＩＢ）によって加熱され、冷媒が蒸
発し、中濃度の吸収液が高温熱交換器（７）を経て低温
再生器（２）に入る。そして、吸収液は高温再生器（１
）から冷媒配管（１６）を流れて来た冷媒蒸気により加
熱され、さらに冷媒が蒸発分離され濃度が高くなる。高
濃度になった吸収液（以下ａ掖という）は低温熱交換器
（６）を経て温度低下して吸収器（５）に散布される。During operation of the absorption chiller, the refrigerant evaporated in the high temperature regenerator (1) flows through the low temperature regenerator (2) to the condenser (3), where it exchanges heat with the water flowing in the condenser heat exchanger (27). After being condensed and liquefied, it flows to the evaporator (4) via the refrigerant pipe (17). Then, the refrigerant liquid exchanges heat with the water in the cold water pipe (22) and evaporates, and the water in the cold water pipe (22) is completely cooled by the heat of vaporization. Then, the cold water is circulated to the load to perform cooling operation. In addition, the refrigerant evaporated in the evaporator (4>) is absorbed by the absorption liquid in the absorber (5).The absorption liquid, which has absorbed the refrigerant and has become diluted in concentration, is cooled to a low temperature by the operation of the absorption liquid pump (15). It is sent to the high temperature regenerator 1) via the heat exchanger (6) and the high temperature heat exchanger (7). The absorption liquid entering the high temperature regenerator (1) is heated by the burner (IB), the refrigerant is evaporated, and the medium concentration absorption liquid enters the low temperature regenerator (2) via the high temperature heat exchanger (7). Then, the absorption liquid is transferred to a high-temperature regenerator (1
) is heated by the refrigerant vapor flowing through the refrigerant pipe (16), and the refrigerant is further evaporated and separated, increasing its concentration. The highly concentrated absorption liquid (hereinafter referred to as "a") passes through a low-temperature heat exchanger (6) to lower its temperature and is sprayed into an absorber (5).
以上のように、吸収冷凍機が運転されているとき、冷水
温度設定器（４０）にて設定された冷水出口温度が制御
装置（３２）で冷却水温度に基づいて決まる制御温度範
囲内の場合には、冷水出口温度検出器（２２５）が検出
した冷水出口温度と設定された冷水出口温度とに基づい
て、制御装置（３２）が動作する。そして、制御装置り
３２）からの開度信号に基づいて加熱量制御弁り２１）
の開度が調節され、高温再生器（１）の加熱量が制御さ
れ、冷水出口温度がほぼ設定温度に制御きれる。又、例
えば春、又は秋等の冷却水入口温度が低いときに、管理
者が表示器（３３）の表示を設定温度表示にし、表示さ
れている設定温度を確認しつつ冷水温度設定器（４０）
にて冷水出口温度を設定範囲より高い温度、即ち、例え
ば冷却水入口温度が２４°Ｃのとき、１０″Ｃに設定し
た場合には、表示器（３３）に１０℃が表示される。又
、制御装置（３２）が動作し、冷水出口温度は制御温度
範囲の上限値である９、０℃に設定変更される。そして
、上記と同様に検出された冷水出口温度と設定された冷
水出口温度とに基づいて加熱量が制御され、第４図に示
したように、冷水出口温度がほぼ９．０℃に制御される
。このとき、高温再生器（１）での加熱量は冷水出口温
度が１０°Ｃに制御されるときより増加し、冷媒発生量
も増え、蒸発器（４）の冷媒溜り量も増加する。As described above, when the absorption chiller is operating, if the chilled water outlet temperature set by the chilled water temperature setting device (40) is within the control temperature range determined by the control device (32) based on the chilled water temperature. The control device (32) operates based on the cold water outlet temperature detected by the cold water outlet temperature detector (225) and the set cold water outlet temperature. Then, based on the opening signal from the control device 32), the heating amount control valve 21)
The opening degree of the regenerator (1) is adjusted, the heating amount of the high temperature regenerator (1) is controlled, and the cold water outlet temperature can be controlled to approximately the set temperature. Also, when the cooling water inlet temperature is low, such as in spring or autumn, the administrator can change the display (33) to display the set temperature, and while checking the displayed set temperature, set the chilled water temperature setting device (40). )
If the chilled water outlet temperature is set at a temperature higher than the set range, that is, for example, when the chilled water inlet temperature is 24°C and is set to 10''C, 10°C will be displayed on the display (33). , the control device (32) operates, and the chilled water outlet temperature is set to 9.0°C, which is the upper limit of the control temperature range.Then, the chilled water outlet temperature detected in the same manner as above and the set chilled water outlet temperature are changed. The amount of heating is controlled based on the temperature, and the cold water outlet temperature is controlled to approximately 9.0°C as shown in Fig. 4.At this time, the amount of heating in the high temperature regenerator (1) is controlled based on the temperature of the cold water outlet. The temperature increases compared to when it is controlled at 10°C, the amount of refrigerant generated also increases, and the amount of refrigerant stored in the evaporator (4) also increases.
又、上記のように冷水出口温度の設定値が制御温度範囲
の上限値より高いときには、制御装置（３２）から表示
器り３３）へ侶号が出力され、表示器（３３）の表示を
設定温度表示から制御温度表示に切換えた場合に第３図
に示したように表示器（３３）の７セグメントＬＥＤ（
３４）に設定器（４０）にて設定された設定温度と実際
に制御されている温度とが異なることを表わす例えば［
の記号が表示され、又、７セグメントＬ Ｅ Ｄ （３
７） 、 （３８）に実際の制御温度である９、０が表
示される。In addition, as mentioned above, when the set value of the cold water outlet temperature is higher than the upper limit of the control temperature range, the control device (32) outputs a signal to the display (33), and the display on the display (33) is set. When switching from temperature display to control temperature display, the 7-segment LED (
34) indicates that the set temperature set by the setting device (40) and the actually controlled temperature are different.
symbol is displayed, and 7 segment L E D (3
7) 9 and 0, which are the actual control temperatures, are displayed in (38).
その後、例えば外気温の上昇等に伴い冷却水温度が上昇
し、冷却水入口温度が２５℃になり、設定温度が制御温
度範囲の上限値に等しくなると、制御装置（３２〉が動
作し、冷水出口温度がほぼ設定温度の１０℃に制御され
る。又、制御装置（３２〉から表示器（３３）へ出力さ
れる信号が変化し、７セグメントＬ Ｅ Ｄ （３４）
の［の記号と、制御温度の９゜０との表示が消え、表示
器（３３）の表示を設定温度表示にしたときには７セグ
メントＬ Ｅ Ｄ（３７） 、 （３８）に設定温度を
表わす１０が表示される。After that, when the cooling water temperature rises due to, for example, a rise in the outside temperature, the cooling water inlet temperature reaches 25°C, and the set temperature becomes equal to the upper limit of the control temperature range, the control device (32> is activated and the cooling water The outlet temperature is controlled to approximately the set temperature of 10°C. Also, the signal output from the control device (32) to the display (33) changes, and the 7-segment L E D (34)
The [ symbol and the control temperature 9°0 display disappear, and when the display (33) is set to display the set temperature, the 7-segment L E D (37), (38) shows the set temperature 10. is displayed.
以後同様に、設定器（４０）にて設定された設定温度が
そのときの冷却水入口温度により決まる制御温度範囲内
のときには、冷水出口温度が設定温度に制御される。又
、上記設定温度が制御温度範囲外のときには、冷水出口
温度がＩｌｌ ４Ｎ範囲の上限値に制御される。Thereafter, similarly, when the set temperature set by the setting device (40) is within the control temperature range determined by the cooling water inlet temperature at that time, the chilled water outlet temperature is controlled to the set temperature. Further, when the set temperature is outside the control temperature range, the cold water outlet temperature is controlled to the upper limit value of the Ill 4N range.
上記実施例によれば、冷却水入口温度に基づいて冷水の
制御温度範囲が制限され、冷水温度が制御温度範囲内に
制御されるため、冷却水温度が低いときに冷水温度が高
く設定されることを回避でき、高温再生器（１）の冷媒
発生量を増やし、冷媒量を確保し冷媒不足による冷媒ポ
ンプ（１９）のキャビテーション等を回避して故障を防
止することができ、この結果、吸収冷凍機を長期間にわ
たり使用することが可能になる。According to the above embodiment, the control temperature range of the chilled water is limited based on the coolant inlet temperature, and the chilled water temperature is controlled within the control temperature range, so the chilled water temperature is set high when the coolant temperature is low. It is possible to increase the amount of refrigerant generated in the high-temperature regenerator (1), secure the amount of refrigerant, and avoid cavitation of the refrigerant pump (19) due to lack of refrigerant, thereby preventing breakdowns. It becomes possible to use the refrigerator for a long period of time.
又、冷水の温度をその時の冷却水温度に基づく制御温度
範囲内に設定し、その後、冷却水温度が低下し、制御温
度範囲の上限値が変化し、設定値が制御温度範囲から外
れた場合には、冷水温度が制御温度範囲の上限値に制御
されるため、冷却水温度が低下したときに、冷水温度が
高く制置されることを防止でき、冷媒量を確保して冷媒
ポンプ（１９）のキャビテーション等を回避して故障を
防止でき、吸収冷凍機を長期間にわたり使用することが
可能になる。Also, if the temperature of the chilled water is set within the control temperature range based on the cooling water temperature at that time, then the coolant temperature decreases, the upper limit of the control temperature range changes, and the set value deviates from the control temperature range. Since the chilled water temperature is controlled to the upper limit of the control temperature range, it is possible to prevent the chilled water temperature from being set too high when the chilled water temperature drops, and to ensure the amount of refrigerant and prevent the refrigerant pump (19 ) Cavitation etc. can be avoided to prevent breakdowns, making it possible to use the absorption refrigerator for a long period of time.
更に、冷水温度設定器（４０）にて設定された冷水温度
が冷却水温度の変化による制御温度範囲の変化により制
御温度範囲から外れ、冷水温度が制御温度範囲の上限値
に制御される場合には、表示器（３３）に］の記号が表
示されると共に、上記上限値の温度が表示されるため、
管理者は、表示器（３３）の表示により、冷水温度が設
定値ではなく、制御温度範囲の上限値に制御されている
ことを知ることができる。Furthermore, when the chilled water temperature set by the chilled water temperature setting device (40) deviates from the control temperature range due to a change in the control temperature range due to a change in the coolant temperature, and the chilled water temperature is controlled to the upper limit value of the control temperature range. , the symbol] is displayed on the display (33) and the temperature of the above upper limit value is displayed.
The administrator can know from the display on the display (33) that the cold water temperature is being controlled not to the set value but to the upper limit of the control temperature range.
尚、本発明は上記実施に限定されるものではなく、吸収
器を例えば外気にて冷却する空冷式の吸収冷凍機におい
ても冷却空気温度に基づいて冷水の制御温度範囲を制限
することにより同様の作用効果を得ることができる。又
、冷水温度の設定値と実際の制御温度とが異なる場合に
は、例えば専用のＬＥＤ等を点灯、又は点滅させても同
様の作用効果を得ることができる。It should be noted that the present invention is not limited to the above-mentioned implementation, but can also be applied to an air-cooled absorption refrigerator in which the absorber is cooled with outside air, for example, by limiting the control temperature range of the chilled water based on the cooling air temperature. Effects can be obtained. Furthermore, if the set value of the cold water temperature differs from the actual control temperature, the same effect can be obtained by, for example, lighting or blinking a dedicated LED or the like.
〈ト）発明の効果
本発明は以上のように構成された吸収冷凍機の制御方法
であり、冷却水或いは冷却空気の温度に基づいて冷水温
度の制御範囲を制限するため、冷却水或いは冷却空気の
温度が低下したとき、冷水温度が高く設定されることを
防止でき、冷水温度が高く設定されたときに発生する冷
媒不足を回避することができ、冷媒ポンプのキャビテー
ション等を防止して故障を肪止し、吸収冷凍機を長期間
にわたり使用することが可能になる。(G) Effects of the Invention The present invention is a method for controlling an absorption refrigerator configured as described above, in which the control range of the chilled water temperature is limited based on the temperature of the cooling water or cooling air. When the temperature of the refrigerant pump decreases, the chilled water temperature can be prevented from being set too high, and the refrigerant shortage that occurs when the chilled water temperature is set too high can be avoided, and cavitation of the refrigerant pump can be prevented to prevent failure. This makes it possible to retain fat and use the absorption refrigerator for a long period of time.
又、冷却水或いは冷却空気の温度に基づいて冷水温度の
制御範囲を制限し、冷水温度設定値が制御範囲外のとき
は冷水温度を制御範囲の上限値に制御し、かつ、冷水温
度設定値が、制御範囲内のときは冷水温度を冷水温度設
定値に制御することにより、冷却水温度が低下したとき
、冷水温度が高く設定されることを防止でき、冷媒不足
を回避して冷媒ポンプ等の故障を回避することができ、
この結果、吸収冷凍機を長期間にわたり使用することが
でき、又、冷水温度設定値が制御範囲内のときには冷水
温度を冷水温度設定値に制御し、はぼ設定温度の冷水を
得ることができる。In addition, the control range of the chilled water temperature is limited based on the temperature of the cooling water or cooling air, and when the chilled water temperature set value is outside the control range, the chilled water temperature is controlled to the upper limit of the control range, and the chilled water temperature set value is However, by controlling the chilled water temperature to the chilled water temperature set value when it is within the control range, it is possible to prevent the chilled water temperature from being set too high when the chilled water temperature drops, and to avoid refrigerant shortage and reduce the refrigerant pump, etc. failure can be avoided,
As a result, the absorption chiller can be used for a long period of time, and when the chilled water temperature setting value is within the control range, the chilled water temperature can be controlled to the chilled water temperature setting value, and chilled water at almost the set temperature can be obtained. .
更に、冷却水或いは冷却空気の温度に基づいて冷水温度
の制御範囲を制限し、冷水温度設定値が制御範囲外のと
きには、冷水温度を制御範囲の上限値に制御し、かつ、
表示器を動作させることにより、冷媒不足を回避して吸
収冷凍機を長期間にわたり使用することができると共に
、吸収冷凍機の管理者に冷水温度が制御範囲の上限値に
制御されていることを知らせることができ、故障による
冷水温度の制御異常等と区別することができる。Furthermore, the control range of the chilled water temperature is limited based on the temperature of the cooling water or the cooling air, and when the chilled water temperature setting value is outside the control range, the chilled water temperature is controlled to the upper limit value of the control range, and
By operating the display, it is possible to avoid refrigerant shortages and use the absorption chiller for a long period of time, and to notify the absorption chiller administrator that the chilled water temperature is being controlled to the upper limit of the control range. It is possible to notify the user of the problem and distinguish it from abnormalities in the control of chilled water temperature due to malfunctions, etc.
第１図は本発明の一実施例を示す吸収冷凍機の回路構成
図、第２図は本発明の一実施例を示す冷却水の入口温度
と冷水制御温度の上限値との関係図、第３図は本発明の
一実施例を示す表示装置の構成図、第４図は本発明の制
御動作の説明図である。
（１）・・・高温再生器、 （３）・・・凝縮器、 （
４）・・・蒸発器、 （５）・・・吸収器、 （３３）
・・・表示器。Fig. 1 is a circuit configuration diagram of an absorption refrigerator showing an embodiment of the present invention, Fig. 2 is a diagram showing the relationship between the cooling water inlet temperature and the upper limit of the chilled water control temperature, showing an embodiment of the invention. FIG. 3 is a block diagram of a display device showing an embodiment of the present invention, and FIG. 4 is an explanatory diagram of the control operation of the present invention. (1)...High temperature regenerator, (3)...Condenser, (
4)...Evaporator, (5)...Absorber, (33)
···display.
Claims (1)
管接続し、空気調和機等に供給する冷水の温度がその設
定値に一致するように再生器の加熱量を制御する吸収冷
凍機において、冷却水或いは冷却空気の温度に基づいて
冷水温度の制御範囲を制限することを特徴とする吸収冷
凍機の制御方法。 ２、吸収器、再生器、凝縮器、及び蒸発器をそれぞれ配
管接続し、空気調和機等に供給する冷水の温度がその設
定値に一致するように再生器の加熱量を制御する吸収冷
凍機において、冷却水或いは冷却空気の温度に基づいて
冷水温度の制御範囲を制限し、冷水温度設定値が上記制
御範囲外のときは冷水温度を制御範囲の上限値に制御し
、かつ、冷水温度設定値が制御範囲内のときは冷水温度
を冷水温度設定値に制御することを特徴とする吸収冷凍
機の制御方法。 ３、吸収器、再生器、凝縮器、及び蒸発器をそれぞれ配
管接続し、空気調和機等に供給する冷水の温度がその設
定値に一致するように再生器の加熱量を制御する吸収冷
凍機において、冷却水或いは冷却空気の温度に基づいて
冷水温度の制御範囲を制限し、冷水温度設定値が制御範
囲外のときは冷水温度を制御範囲の上限値に制御し、か
つ、表示器を動作させることを特徴とする吸収冷凍機の
制御方法。[Claims] 1. Connect the absorber, regenerator, condenser, and evaporator through piping, and adjust the heating amount of the regenerator so that the temperature of the cold water supplied to the air conditioner, etc. matches the set value. 1. A method for controlling an absorption refrigerating machine, comprising: limiting a control range of chilled water temperature based on the temperature of cooling water or cooling air. 2. An absorption chiller in which the absorber, regenerator, condenser, and evaporator are each connected via piping, and the amount of heating of the regenerator is controlled so that the temperature of the chilled water supplied to an air conditioner, etc. matches the set value. , the control range of the chilled water temperature is limited based on the temperature of the cooling water or the cooling air, and when the chilled water temperature setting value is outside the control range, the chilled water temperature is controlled to the upper limit value of the control range, and the chilled water temperature setting is A control method for an absorption chiller, characterized in that the chilled water temperature is controlled to a chilled water temperature set value when the value is within a control range. 3. An absorption chiller that connects the absorber, regenerator, condenser, and evaporator with piping, and controls the amount of heat from the regenerator so that the temperature of the cold water supplied to an air conditioner, etc. matches the set value. , the control range of the chilled water temperature is limited based on the temperature of the cooling water or cooling air, and when the chilled water temperature set value is outside the control range, the chilled water temperature is controlled to the upper limit of the control range, and the display is operated. A method for controlling an absorption refrigerator, characterized in that:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4249989A JP2719387B2 (en) | 1989-02-22 | 1989-02-22 | Control method of absorption refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP4249989A JP2719387B2 (en) | 1989-02-22 | 1989-02-22 | Control method of absorption refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH02219964A true JPH02219964A (en) | 1990-09-03 |
| JP2719387B2 JP2719387B2 (en) | 1998-02-25 |
Family
ID=12637758
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP4249989A Expired - Lifetime JP2719387B2 (en) | 1989-02-22 | 1989-02-22 | Control method of absorption refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2719387B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024944A (en) * | 2007-07-20 | 2009-02-05 | Yazaki Corp | Absorption type water cooling and heating apparatus |
-
1989
- 1989-02-22 JP JP4249989A patent/JP2719387B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2009024944A (en) * | 2007-07-20 | 2009-02-05 | Yazaki Corp | Absorption type water cooling and heating apparatus |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2719387B2 (en) | 1998-02-25 |
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