JP2752131B2 - Control device for absorption refrigerator - Google Patents
Control device for absorption refrigeratorInfo
- Publication number
- JP2752131B2 JP2752131B2 JP4781389A JP4781389A JP2752131B2 JP 2752131 B2 JP2752131 B2 JP 2752131B2 JP 4781389 A JP4781389 A JP 4781389A JP 4781389 A JP4781389 A JP 4781389A JP 2752131 B2 JP2752131 B2 JP 2752131B2
- Authority
- JP
- Japan
- Prior art keywords
- power failure
- power
- pump
- refrigerant
- absorption
- 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
Links
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Description
【発明の詳細な説明】 (イ)産業上の利用分野 本発明は吸収冷凍機の制御装置に関し、特に停電発生
時の吸収冷凍機の運転を制御する吸収冷凍機の制御装置
に関する。The present invention relates to a control device for an absorption refrigerator, and more particularly to a control device for an absorption refrigerator that controls the operation of the absorption refrigerator when a power failure occurs.
(ロ)従来の技術 吸収冷凍機において、特開昭60−71866号公報、又
は、特開昭60−71867号公報に開示されているように、
停止させる場合には、吸収液ポンプ等を運転し、稀釈運
転を行い、冷水の凍結や、吸収液の結晶防止を図ってい
た。(B) Conventional technology In an absorption refrigerator, as disclosed in JP-A-60-71866 or JP-A-60-71867,
When stopping the operation, the absorption liquid pump or the like was operated to perform a dilution operation to prevent freezing of cold water and to prevent crystallization of the absorption liquid.
(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、吸収冷凍機の運転中に停電
が発生した場合には、稀釈運転が行われないまま吸収冷
凍機が停止してしまい、機器の保護から好ましくない。
又、運転中に停電により吸収冷凍機が停止し、その後、
復電したとき、例えば運転スイッチの構造から、ノッチ
が運転の位置にある場合には、運転が再開されるが二次
側の設備、例えばファンコイル、又はファンコイルへの
冷水循環用のポンプの状態がわからないまま運転が行わ
れるものがあり、二次側が非通電の状態で吸収冷凍機の
運転が開始された場合には、運転が無駄になると共に、
例えば吸収冷凍機側の冷水循環用のポンプ等に故障が発
生す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, if a power failure occurs during the operation of the absorption chiller, the absorption chiller stops without performing the dilution operation, and the equipment is protected. Is not preferred.
In addition, during operation, the absorption refrigerator stops due to a power failure, and then
When the power is restored, for example, due to the structure of the operation switch, if the notch is in the operation position, the operation is restarted, but the secondary side equipment, such as a fan coil, or a pump for circulating cold water to the fan coil, Some operations are performed without knowing the state, and if the operation of the absorption refrigerator is started in a state where the secondary side is not energized, the operation becomes useless,
For example, there has been a problem that a failure occurs in a pump for circulating cold water on the absorption chiller side.
本発明は、停電が発生したときの吸収冷凍機での凍
結、結晶等の発生を防止し、又、復電時の運転再開によ
る運転の無駄、及び機器の故障を回避することを目的と
する。It is an object of the present invention to prevent freezing in an absorption refrigerator, generation of crystals, and the like when a power failure occurs, and to avoid waste of operation due to restarting operation at the time of power recovery and failure of equipment. .
(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)、
熱源を有する再生器(1)、凝縮器(3)、冷媒を循環
させる冷媒ポンプ(15)を有する蒸発器(4)から構成
されると共に、蒸発器(4)で冷却された冷水を負荷へ
循環させる冷水ポンプ(24)、吸収器(5)内で冷媒を
吸収して濃度が薄くなった吸収液を再生器(1)へ送る
吸収液ポンプ(15)を有する吸収冷凍機の制御装置にお
いて、停電中においても電力供給を可能とするバックア
ップ電源(37)と、このバックアップ電源(37)からの
電力で動作し、停電/復電を検知した際に停電/復電信
号を出力する停電検知器(32)と、バックアップ電源
(37)からの電力で動作し、停電信号を入力して停電発
生をバックアップ電源(37)からの電力で動作するメモ
リ(33)に記憶させ、このメモリ(33)に停電発生が記
憶されている間に停電検知器(32)から復電信号が出力
された際には冷媒ポンプ(19)、冷水ポンプ(24)及び
熱源の運転を停止状態に保つと共に吸収液ポンプ(15)
の運転を再開させるCPU(中央演算装置)とを備えた吸
収冷凍機の制御装置を提供するものである。(D) Means for Solving the Problems The present invention provides an absorber (5) for solving the above problems.
A regenerator (1) having a heat source, a condenser (3), an evaporator (4) having a refrigerant pump (15) for circulating a refrigerant, and chilled water cooled by the evaporator (4) is supplied to a load. In a control device of an absorption refrigerator having an absorption liquid pump (15) for circulating a chilled water pump (24) and for absorbing a refrigerant in an absorber (5) to send an absorption liquid having a reduced concentration to a regenerator (1). , A backup power supply (37) that can supply power even during a power failure, and a power failure detection that operates with power from the backup power supply (37) and outputs a power failure / recovery signal when a power failure / recovery is detected Operating with the power from the backup power supply (37), and inputting a power failure signal to store the occurrence of a power failure in a memory (33) operated with the power from the backup power supply (37). ) Power failure detection while power failure occurrence is stored in (32) the coolant pump when the power recovery signal is output from (19), the absorbing solution pump with keeping the operation of the chilled water pump (24) and the heat source in the stopped state (15)
And a control device for the absorption refrigerator including a CPU (Central Processing Unit) for restarting the operation of the absorption refrigerator.
また、吸収器(5)、熱源を有する再生器(1)、凝
縮器(3)、冷媒を循環させる冷媒ポンプ(19)を有す
る蒸発器(4)から構成されると共に、蒸発器(4)で
冷却された冷水を負荷へ循環させる冷水ポンプ(24)、
吸収器(5)内で冷媒を吸収して濃度が薄くなった吸収
液を再生器(1)へ送る吸収液ポンプ(15)を有する吸
収冷凍機の制御装置において、停電中においても電力供
給を可能とするバックアップ電源(37)と、このバック
アップ電源(37)からの電力で動作し、停電/復電を検
知した際に停電/復電信号を出力する停電検知器(32)
と、バックアップ電源(37)からの電力で動作し、停電
信号に応答して計時を開始するタイマと、バックアップ
電源(37)からの電力で動作し、タイマの計時が所定時
間以前に停電検知器(32)から復電信号が出力された際
には記冷媒ポンプ(19)、冷水ポンプ(24)及び熱源の
運転を停止状態に保つと共に吸収液ポンプ(15)の運転
を一定時間再開させた後吸収冷凍機の運転を停止状態に
変えるCPU(中央演算装置)とを備えた吸収冷凍機の制
御装置を提供するものである。The evaporator (5) includes an absorber (5), a regenerator (1) having a heat source, a condenser (3), and an evaporator (4) having a refrigerant pump (19) for circulating a refrigerant. Chilled water pump (24) that circulates chilled water cooled by
In the control device of the absorption refrigerator having the absorption liquid pump (15) for sending the absorption liquid having a reduced concentration by absorbing the refrigerant in the absorber (5) to the regenerator (1), power is supplied even during a power failure. A backup power supply (37) that can be used and a power failure detector (32) that operates with power from the backup power supply (37) and outputs a power failure / recovery signal when power failure / recovery is detected
And a timer that operates with the power from the backup power supply (37) and starts timing in response to a power failure signal, and a timer that operates with the power from the backup power supply (37) and measures the timer before the predetermined time When the power recovery signal was output from (32), the operation of the refrigerant pump (19), the chilled water pump (24) and the heat source was stopped, and the operation of the absorbent pump (15) was restarted for a certain period of time. An object of the present invention is to provide a control device for an absorption refrigerator including a CPU (Central Processing Unit) for changing the operation of the post absorption refrigerator to a stopped state.
(ホ)作用 吸収冷凍機の運転中に停電が発生し、その後、復電し
たときには吸収液の循環系ののみが運転され、吸収液が
高温再生器(1)、及び吸収器(5)等に循環し、稀釈
運転が行われ、結晶の発生等を回避することが可能にな
る。(E) Operation A power failure occurs during the operation of the absorption refrigerator, and thereafter, when the power is restored, only the circulating system of the absorption liquid is operated, and the absorption liquid is heated to a high temperature regenerator (1), an absorber (5), etc. And the dilution operation is performed, thereby making it possible to avoid the generation of crystals and the like.
又、停電が発生した後、比較的短い時間で復電したと
きには、所定時間吸収液ポンプ(15)が運転され、稀釈
運転が行われ、結晶の発生等を回避することができ、
又、停電発生後、所定時間内に復電せず、所定時間経過
して稀釈運転のよる結晶防止等の効果が小さくなった後
に復電した場合には、吸収液ポンプ(15)が運転され
ず、吸収液ポンプ(15)の運転時間が短くなり、運転コ
ストを低減することが可能になり、更に、復電後吸収液
ポンプ(15)が停止してからは、吸収冷凍機が待期状態
になり、総ての機器の運転が停止され、吸収冷凍機の二
次側の設備が停止状態であるにもかかわらず吸収冷凍機
が運転状態に入ることを防止でき、吸収冷凍機側の冷水
ポンプ(24)等の故障を回避することが可能になる。Further, when the power is restored in a relatively short time after the occurrence of the power failure, the absorption liquid pump (15) is operated for a predetermined time, the dilution operation is performed, and generation of crystals and the like can be avoided.
In addition, if the power is not restored within a predetermined time after the occurrence of the power failure, but is restored after the predetermined time has elapsed and the effect of diluting operation such as crystallization prevention is reduced, the absorbent pump (15) is operated. The operation time of the absorption pump (15) is shortened, and the operating cost can be reduced. In addition, after the absorption pump (15) stops after power is restored, the absorption chiller waits State, the operation of all equipment is stopped, and the absorption chiller can be prevented from entering the operation state even when the equipment on the secondary side of the absorption chiller is stopped. Failure of the chilled water pump (24) and the like can be avoided.
(ヘ)実施例 以下、本発明の一実施例を図面に基づいて詳細に説明
す。(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(H2O)、吸収剤(吸収液)に臭化リチウム(LiB
r)水溶液を使用したものである。FIG. 1 shows a double-effect absorption refrigerator having water (H 2 O) as a refrigerant and lithium bromide (LiB) as an absorbent (absorbent).
r) An aqueous solution was used.
第1図において、(1)はガスバーナ(1B)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(12)は吸収
液配管、(15)は吸収液ポンプ、(16)ないし(18)は
冷媒配管、(19)は冷媒ポンプ、(20)はガスバーナ
(1B)に接続されたガス配管、(21)は加熱量制御弁、
(22)は冷水配管、(24)は冷水ポンプであり、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、
(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)、凝縮器熱交換器(27)、
及び冷却水ポンプ(29)が設けられている。In FIG. 1, (1) is a high-temperature regenerator equipped with a gas burner (1B), (2) is a low-temperature regenerator, (3) is a condenser,
(4) is an evaporator, (5) is an absorber, (6) is a low-temperature heat exchanger, (7) is a high-temperature heat exchanger, (8) to (12) are absorbent pipes, and (15) is an absorbent. Pump, (16) to (18) are refrigerant pipes, (19) is a refrigerant pump, (20) is a gas pipe connected to a gas burner (1B), (21) is a heating amount control valve,
(22) is a chilled water pipe, and (24) is a chilled water pump, each of which is connected as shown in FIG. or,
(25) is a cooling water pipe, and in the middle of the cooling water pipe (25), an absorber heat exchanger (26), a condenser heat exchanger (27),
And a cooling water pump (29).
又、(30)は吸収冷凍機の制御盤、(31)は制御盤
(30)に設けられたマイコン演算装置、(S)は運転ス
イッチである。そして、このマイコン演算装置(31)に
は、停電、及び復電を検知して動作する停電検知器(3
2)と、停電発生時に停電発生状態を記憶するメモリ(3
3)と、停電発生時の停電時間、及び停電発生後に復電
したときの吸収液ポンプ(15)の運転時間をカウントす
るタイマ(34)と、停電検知器(32)からの信号に基づ
いて動作し、メモリ(33)、及びタイマ(34)へ信号を
出力する中央演算装置(以下CPUという)(35)と、イ
ンターフェース(36)と、バックアップ電源(37)等が
設けられている。Further, (30) is a control panel of the absorption refrigerator, (31) is a microcomputer arithmetic unit provided in the control panel (30), and (S) is an operation switch. The microcomputer operation device (31) includes a power failure detector (3) that operates by detecting a power failure and a power recovery.
2) and a memory (3
3), a timer (34) that counts the power outage time when a power outage occurs, and the operation time of the absorbent pump (15) when power is restored after the power outage occurs, and a signal from the power outage detector (32). A central processing unit (hereinafter referred to as CPU) (35) that operates and outputs signals to a memory (33) and a timer (34), an interface (36), a backup power supply (37), and the like are provided.
上記、吸収冷凍機の運転時、従来の吸収冷凍機と同様
に高温再生器(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)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)内の水が冷却される。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(1)へ送られる。高温
再生器(1)に入った吸収液はバーナ(1B)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(以下濃液という)
は低温熱交換器(6)を経て温度低下して吸収器(5)
へ送られ、散布される。During the operation of the absorption refrigerator, the refrigerant evaporated in the high-temperature regenerator (1) is cooled in the low-temperature regenerator (2) in the same manner as the conventional absorption refrigerator.
After flowing through the condenser heat exchanger (27) and condensing and liquefying through the water flowing through the condenser heat exchanger (27), the refrigerant flows to the evaporator (4) via the refrigerant pipe (17). Then, the refrigerant liquid exchanges heat with water in the cold water pipe (22) to evaporate, and the water in the cold water pipe (22) is cooled by heat of vaporization. Then, the cooling water is circulated to the load to perform the cooling operation. The refrigerant evaporated in the evaporator (4) is absorbed by the absorbing liquid in the absorber (5). Then, the absorption liquid having a reduced concentration by absorbing the refrigerant is sent to the high-temperature regenerator (1) through the low-temperature heat exchanger (6) and the high-temperature heat exchanger (7) by the operation of the absorption liquid pump (15). . The absorbent entering the high-temperature regenerator (1) is heated by the burner (1B), the refrigerant evaporates, and the medium-concentration absorbent enters the low-temperature regenerator (2) via the high-temperature heat exchanger (7). Then, the absorbing liquid is heated by the refrigerant vapor flowing from the high-temperature regenerator (1) through the refrigerant pipe (16), and the refrigerant is further evaporated and separated to have a high concentration. Absorbed liquid with high concentration (hereinafter referred to as concentrated liquid)
The temperature decreases through the low-temperature heat exchanger (6) and the absorber (5)
Sent to and sprayed.
上記のように吸収冷凍機が運転しているとき、第2図
に示した時刻(T1)にて停電が発生した場合には、吸収
液ポンプ(15)、冷媒ポンプ(19)、冷水ポンプ(2
4)、及び冷却水ポンプ(29)の運転が停止すると共
に、高温再生器(1)のバーナ(1B)の燃焼が停止し、
吸収冷凍機の運転が停止する。又、停電発生を停電検知
器(32)が検知してCPU(31)へ停電信号を出力する。
そして、停電信号を入力したCPU(31)は動作し、メモ
リ(33)、及びタイマ(34)へ信号を出力し、メモリ
(33)に停電が発生したこと、即ち停電発生状態が記憶
され、タイマ(34)は停電時間のカウントを開始する。
その後、メモリ(33)、タイマ(34)、及びCPU(35)
にはバックアップ電源(37)から電力が供給される。While the absorption chiller is operating as described above, if a power failure occurs at the time (T 1 ) shown in FIG. 2, the absorption liquid pump (15), the refrigerant pump (19), and the chilled water pump (2
4) The operation of the cooling water pump (29) stops, and the combustion of the burner (1B) of the high temperature regenerator (1) stops.
The operation of the absorption refrigerator stops. The power failure detector (32) detects the occurrence of a power failure and outputs a power failure signal to the CPU (31).
Then, the CPU (31) that has received the power failure signal operates, outputs signals to the memory (33) and the timer (34), and the fact that a power failure has occurred in the memory (33), that is, the power failure occurrence state is stored, The timer (34) starts counting the power failure time.
After that, memory (33), timer (34), and CPU (35)
Is supplied with power from a backup power supply (37).
停電が発生してから時間が経過し、タイマ(34)に設
定された所定時間(例えば1時間)が経過する前に時刻
(T2)にて復電した場合には、復電を停電検知器(32)
が検知し、復電信号をCPU(31)へ出力する。そして、C
PU(31)が動作してメモリ(33)の情報を確認し、吸収
液ポンプ(15)の運転信号を出力し、運転信号が制御盤
(30)から吸収液ポンプ(15)へ出力され、吸収液ポン
プ(15)の運転が開始される。このとき、吸収液ポンプ
(15)以外のポンプは運転を開始しない。又、CPU(3
1)からタイマ(34)へ信号が出力され、タイマ(34)
の停電時間がリセットされると共に、タイマ(34)が吸
収液ポンプ(15)の運転時間のカウントを開始する。If the power has been restored at time (T 2 ) before the predetermined time (for example, one hour) set in the timer (34) has elapsed since the occurrence of the power failure, the power recovery is detected as a power failure. Tableware (32)
Detects and outputs a power recovery signal to the CPU (31). And C
The PU (31) operates and checks the information in the memory (33), outputs an operation signal of the absorbent pump (15), and the operation signal is output from the control panel (30) to the absorbent pump (15). The operation of the absorbent pump (15) is started. At this time, pumps other than the absorbent pump (15) do not start operation. In addition, CPU (3
1) The signal is output from the timer (34) to the timer (34).
Is reset, and the timer (34) starts counting the operating time of the absorbent pump (15).
吸収液ポンプ(15)が運転を開始すると、稀吸収液が
吸収器(5)から吸収液管(8)を介して高温再生器
(1)へ送られ、更に、吸収液が吸収液配管(9),
(10),(11),(12)、及び高温熱交換器(7)、低
温熱交換器(6)に循環し、稀釈運転が行われる。そし
て、タイマ(34)がカウントを開始してから所定時間
(例えば10分)経過し、時刻(T3)になると、タイマ
(34)が動作しCPU(35)へ信号を出力し、この信号に
基づいてCPU(35)が動作し、吸収液ポンプ(15)の停
止信号を出力し、吸収液ポンプ(15)の運転が停止し、
稀釈運転が終了する。又、CPU(35)からメモリ(33)
へクリア信号が出力され、停電発生状態の記憶がクリア
される。そして、吸収冷凍機は運転スイッチ(S)から
の信号を待期する待期状態になる。When the absorbent pump (15) starts operation, the diluted absorbent is sent from the absorber (5) to the high-temperature regenerator (1) via the absorbent pipe (8), and the absorbent is further supplied to the absorbent pipe ( 9),
(10), (11), (12), and circulation through the high-temperature heat exchanger (7) and the low-temperature heat exchanger (6) to perform a dilution operation. When a predetermined time (for example, 10 minutes) has elapsed since the timer (34) started counting, and at the time (T 3 ), the timer (34) operates and outputs a signal to the CPU (35). The CPU (35) operates on the basis of and outputs a stop signal of the absorbent pump (15), and the operation of the absorbent pump (15) stops,
The dilution operation ends. Also, CPU (35) to memory (33)
, A clear signal is output, and the storage of the power failure occurrence state is cleared. Then, the absorption refrigerator enters a waiting state for waiting for a signal from the operation switch (S).
その後、吸収冷凍機の管理者が制御盤(30)に設けら
れた運転スイッチ(S)を操作すると、運転スイッチ
(S)からの信号に基づいて制御盤(30)から吸収液ポ
ンプ(15)、冷媒ポンプ(19)、冷水ポンプ(24)、及
び冷却水ポンプ(29)へ運転信号が出力されると共に、
加熱量制御弁(21)へ開信号が出力され、各ポンプ(1
5),(19),(24),(29)、及び高温再生器(1)
が運転を開始し、吸収冷凍機が運転を始める。そして、
管理者が運転スイッチ(S)を操作し、吸収冷凍機を停
止させたときには高温再生器(1)の停止後、第3図に
示したように各ポンプ(15),(19),(24),(29)
が所定時間づつ運転され、稀釈運転が行われる。Thereafter, when the manager of the absorption refrigerator operates the operation switch (S) provided on the control panel (30), the absorption liquid pump (15) is controlled from the control panel (30) based on a signal from the operation switch (S). An operation signal is output to the refrigerant pump (19), the chilled water pump (24), and the chilled water pump (29),
An open signal is output to the heating amount control valve (21), and each pump (1
5), (19), (24), (29), and high-temperature regenerator (1)
Starts operating, and the absorption refrigerator starts operating. And
When the administrator operates the operation switch (S) to stop the absorption refrigerator, after the high-temperature regenerator (1) stops, as shown in FIG. 3, each of the pumps (15), (19), (24) ), (29)
Are operated for a predetermined time, and a dilution operation is performed.
又、上記のように停電が発生し、その後、停電状態が
所定時間継続し、タイマ(34)がカウントアップしたと
きに、復電していない場合には、タイマ(34)からCPU
(35)へ信号が出力される。そして、その後、復電し停
電検知回路(32)から復電信号が出力された場合にも、
吸収液ポンプ(15)の運転信号がCPU(35)から出力さ
れない。このため、吸収液ポンプ(15)は運転を開始せ
ず稀釈運転は行われない。If a power failure occurs as described above and the power failure state continues for a predetermined period of time and the timer (34) counts up, if the power has not been restored, the timer (34) returns to the CPU.
A signal is output to (35). Then, when the power is restored and the power restoration signal is output from the power failure detection circuit (32),
The operation signal of the absorbent pump (15) is not output from the CPU (35). For this reason, the absorbent pump (15) does not start operation and the dilution operation is not performed.
上記実施例によれば、吸収冷凍機の運転中に停電が発
生した場合には、メモリ(33)に停電発生状態が記憶さ
れると共に、タイマ(34)が動作を開始し、所定時間内
に復電したときに所定時間吸収液ポンプ(15)が運転さ
れ、吸収液が高温再生器(1)、吸収液配管(8)〜
(12)、及び各熱交換器(6),(7)を循環し、稀釈
運転が行われるため、濃吸収液が流れる吸収液配管(1
1),(12)、及び低温熱交換器(6)で吸収液の結晶
が発生することを防止でき、又、高温再生器(1)の温
度上昇した吸収液を吸収液配管(8)〜(12)、及び各
熱交換器(6),(7)を介して吸収器(5)へ送り、
吸収器(5)、及び蒸発器(4)の温度を上昇させるこ
とができ、冷水の凍結を防止することができる。ここで
復電時に吸収液ポンプ(15)が運転されたとき、吸収液
ポンプ(15)を濃液の濃度が低下した時点で停止しても
同様の作用効果を得ることができる。According to the above embodiment, when a power failure occurs during the operation of the absorption refrigerator, the power failure occurrence state is stored in the memory (33), and the timer (34) starts operating. When the power is restored, the absorption liquid pump (15) is operated for a predetermined time, and the absorption liquid is supplied to the high-temperature regenerator (1), the absorption liquid pipe (8) to
(12) and the heat exchangers (6) and (7) are circulated to perform the dilution operation.
1), (12) and the low-temperature heat exchanger (6) can be prevented from generating crystals of the absorbing solution, and the high-temperature regenerating device (1) can absorb the rising temperature of the absorbing solution through the absorbing solution piping (8) to (12) and sent to the absorber (5) via the heat exchangers (6) and (7),
The temperature of the absorber (5) and the evaporator (4) can be raised, and freezing of cold water can be prevented. Here, even when the absorption pump (15) is operated at the time of power recovery, the same operation and effect can be obtained even if the absorption pump (15) is stopped at the time when the concentration of the concentrated liquid is reduced.
又、停電発生時から所定時間内に復電しないときに
は、タイマ(34)が動作してCPU(35)へ信号を出力
し、その後、復電して停電検出器(32)からCPU(35)
へ信号が出力された場合にも、CPU(35)から吸収液ポ
ンプ(15)の運転信号が出力されず、吸収液ポンプ(1
5)は運転を開始しないため、停電発生時から所定時間
経過し、高温再生器(1)、各吸収液配管(8)〜(1
2)、及び各熱交換器(6),(7)の温度が冷え、稀
釈運転による結晶防止等の効果が小さくなってから吸収
液ポンプ(15)の運転が行われることを防止でき、この
結果、吸収液ポンプ(15)による消費電力を削減するこ
とができる。更に、停電が発生し、復電後の稀釈運転が
終ってからは各ポンプ(15),(19),(24),(29)
等は運転されず、運転スイッチ(S)が操作されるまで
吸収冷凍機が待期状態であるため、稀釈運転終了後、二
次側の設備の状態に関係なく吸収冷凍機が運転を開始す
ることを防止でき、吸収冷凍機側の無駄な運転を回避で
きると共に、冷水ポンプ(24)等の故障を防止すること
ができる。If the power is not restored within a predetermined time after the occurrence of the power failure, the timer (34) operates to output a signal to the CPU (35), and thereafter, the power is restored and the power failure detector (32) switches to the CPU (35).
Even when a signal is output to the absorption pump (1), the operation signal of the absorption pump (15) is not output from the CPU (35).
In 5), since the operation is not started, a predetermined time has elapsed since the occurrence of the power failure, and the high-temperature regenerator (1) and the absorbent pipes (8) to (1)
2) and the operation of the absorbent pump (15) can be prevented after the temperature of the heat exchangers (6) and (7) has cooled and the effect of the dilution operation such as prevention of crystallization has decreased. As a result, power consumption by the absorbing liquid pump (15) can be reduced. Furthermore, after a power failure occurs and the dilution operation after power recovery is completed, each pump (15), (19), (24), (29)
Are not operated and the absorption chiller is in a waiting state until the operation switch (S) is operated. Therefore, after the dilution operation is completed, the absorption chiller starts operating regardless of the state of the secondary-side equipment. This can prevent unnecessary operation on the absorption chiller side and can prevent failure of the chilled water pump (24) and 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装
置であり、停電発生後復電したとき吸収液ポンプを運転
させるため、吸収器、再生器、及び吸収液配管等に吸収
液を循環させ、稀釈運転を行うことができ、冷水の凍
結、及び結晶の発生等を防止することができる。(G) Effects of the Invention The present invention is a control device for an absorption refrigerator configured as described above, and operates an absorber, a regenerator, and an absorber pipe to operate an absorber pump when power is restored after a power failure occurs. The dilution operation can be performed by circulating the absorbing solution, etc., and freezing of cold water and generation of crystals can be prevented.
又、停電発生後短い時間で復電したときには、所定時
間吸収液ポンプのみを運転させ、その後、運転信号に対
して待期するようにしたため、停電発生後の復電時に吸
収液ポンプを所定時間運転し、稀釈運転を行うことがで
き、冷水の凍結、及び結晶の発生を防止することがで
き、又、停電発生後、短い時間で復電しなかった場合に
はその後、復電した場合にも稀釈運転が行われず、無駄
に稀釈運転が行われることを防止でき、更に、復電時、
稀釈運転が行われた場合、稀釈運転終了後は吸収冷凍機
は運転されず、待期状態になり、二次側の設備、即ちフ
ァンコイル、冷水ポンプ等の状態に関係なく吸収冷凍機
が運転を始めることを防止でき、吸収冷凍機の機器の保
護を図ることができる。In addition, when the power is restored in a short time after the occurrence of the power failure, only the absorption pump is operated for a predetermined time, and then the operation pump is made to wait for an operation signal. Driving, dilution operation can be performed, freezing of cold water and generation of crystals can be prevented, and if power is not restored in a short time after a power failure occurs, The dilution operation is not performed, and it can be prevented that the dilution operation is performed unnecessarily.
When the dilution operation is performed, the absorption chiller is not operated after the dilution operation is completed, and enters a waiting state, and the absorption chiller operates regardless of the state of the secondary-side equipment, that is, the fan coil, the chilled water pump, and the like. Can be prevented, and the equipment of the absorption refrigerator can be protected.
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図は停電発生時の制御動作の説明図、第3図は
通常の稀釈運転時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、(15)……吸収液ポンプ、
(30)……制御盤、(32)……停電検知器、(33)……
メモリ、(34)……タイマ。FIG. 1 is a circuit diagram of an absorption refrigerator showing one embodiment of the present invention, FIG. 2 is an explanatory diagram of a control operation when a power failure occurs, and FIG. 3 is an explanatory diagram of a control operation during a normal dilution operation. is there. (1) High temperature regenerator (3) Condenser (4)
Evaporator (5) Absorber (15) Absorbent pump
(30) Control panel (32) Power failure detector (33)
Memory, (34) ... Timer.
Claims (2)
媒を循環させる冷媒ポンプを有する蒸発器から構成され
ると共に、前記蒸発器で冷却された冷水を負荷へ循環さ
せる冷水ポンプ、前記吸収器内で冷媒を吸収して濃度が
薄くなった吸収液を前記再生器へ送る吸収液ポンプを有
する吸収冷凍機の制御装置において、停電中においても
電力供給を可能とするバックアップ電源と、このバック
アップ電源からの電力で動作し、停電/復電を検知した
際に停電/復電信号を出力する停電検知器と、前記バッ
クアップ電源からの電力で動作し、前記停電信号を入力
して停電発生を前記バックアップ電源からの電力で動作
するメモリに記憶させ、このメモリに停電発生が記憶さ
れている間に前記停電検知器から復電信号が出力された
際には前記冷媒ポンプ、前記冷水ポンプ及び前記熱源の
運転を停止状態に保つと共に前記吸収液ポンプの運転を
再開させるCPU(中央演算装置)とを備えたことを特徴
とする吸収冷凍機の制御装置。1. A chilled water pump comprising an absorber, a regenerator having a heat source, a condenser, an evaporator having a refrigerant pump for circulating a refrigerant, and circulating cold water cooled by the evaporator to a load. In a control device of an absorption refrigerator having an absorption liquid pump for sending an absorption liquid having a reduced concentration by absorbing a refrigerant in the absorber to the regenerator, a backup power supply that enables power supply even during a power failure, A power failure detector that operates with power from a backup power supply and outputs a power failure / recovery signal when power failure / recovery is detected, and operates with power from the backup power supply and receives the power failure signal to generate a power failure Is stored in a memory operated by the power from the backup power supply, and when a power recovery signal is output from the power failure detector while the power failure occurrence is stored in this memory, the refrigerant port is output. Flop, the control device of the absorption refrigerating machine, characterized in that a said cold water pump and CPU to resume operation of the absorbing liquid pump with keeping the operation of the heat source in a stopped state (central processing unit).
媒を循環させる冷媒ポンプを有する蒸発器から構成され
ると共に、前記蒸発器で冷却された冷水を負荷へ循環さ
せる冷水ポンプ、前記吸収器内で冷媒を吸収して濃度が
薄くなった吸収液を前記再生器へ送る吸収液ポンプを有
する吸収冷凍機の制御装置において、停電中においても
電力供給を可能とするバックアップ電源と、このバック
アップ電源からの電力で動作し、停電/復電を検知した
際に停電/復電信号を出力する停電検知器と、前記バッ
クアップ電源からの電力で動作し、停電信号に応答して
計時を開始するタイマと、前記バックアップ電源からの
電力で動作し、前記タイマの計時が所定時間以前に前記
停電検知器から復電信号が出力された際には前記冷媒ポ
ンプ、前記冷水ポンプ及び前記熱源の運転を停止状態に
保つと共に前記吸収液ポンプの運転を一定時間再開させ
た後吸収冷凍機の運転を停止状態に変えるCPU(中央演
算装置)とを備えたことを特徴とする吸収冷凍機の制御
装置。2. A chilled water pump, comprising an absorber, a regenerator having a heat source, a condenser, and an evaporator having a refrigerant pump for circulating a refrigerant, and circulating cold water cooled by the evaporator to a load. In a control device of an absorption refrigerator having an absorption liquid pump for sending an absorption liquid having a reduced concentration by absorbing a refrigerant in the absorber to the regenerator, a backup power supply that enables power supply even during a power failure, A power failure detector that operates on the power from the backup power supply and outputs a power failure / recovery signal when a power failure / recovery is detected, and operates with power from the backup power supply and starts timing in response to the power failure signal And a timer that operates with the power from the backup power supply. When the power recovery signal is output from the power failure detector before a predetermined time has elapsed, the refrigerant pump and the chilled water pump are operated. And a CPU (Central Processing Unit) that keeps the operation of the heat source and the heat source in a stopped state and restarts the operation of the absorption liquid pump for a certain period of time, and then changes the operation of the absorption refrigerator to a stopped state. Control device for absorption refrigerator.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4781389A JP2752131B2 (en) | 1989-02-28 | 1989-02-28 | Control device for absorption refrigerator |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP4781389A JP2752131B2 (en) | 1989-02-28 | 1989-02-28 | Control device for absorption refrigerator |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH02230066A JPH02230066A (en) | 1990-09-12 |
JP2752131B2 true JP2752131B2 (en) | 1998-05-18 |
Family
ID=12785805
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP4781389A Expired - Lifetime JP2752131B2 (en) | 1989-02-28 | 1989-02-28 | Control device for absorption refrigerator |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP2752131B2 (en) |
-
1989
- 1989-02-28 JP JP4781389A patent/JP2752131B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JPH02230066A (en) | 1990-09-12 |
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