JP2752139B2 - Control device for absorption refrigerator - Google Patents

Control device for absorption refrigerator

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Publication number
JP2752139B2
JP2752139B2 JP7140389A JP7140389A JP2752139B2 JP 2752139 B2 JP2752139 B2 JP 2752139B2 JP 7140389 A JP7140389 A JP 7140389A JP 7140389 A JP7140389 A JP 7140389A JP 2752139 B2 JP2752139 B2 JP 2752139B2
Authority
JP
Japan
Prior art keywords
power
power failure
pump
refrigerant
power supply
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP7140389A
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Japanese (ja)
Other versions
JPH02251058A (en
Inventor
哲郎 岸本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Sanyo Denki Co Ltd
Original Assignee
Sanyo Denki Co Ltd
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Filing date
Publication date
Application filed by Sanyo Denki Co Ltd filed Critical Sanyo Denki Co Ltd
Priority to JP7140389A priority Critical patent/JP2752139B2/en
Publication of JPH02251058A publication Critical patent/JPH02251058A/en
Application granted granted Critical
Publication of JP2752139B2 publication Critical patent/JP2752139B2/en
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Expired - Lifetime legal-status Critical Current

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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, There is a case where the operation is performed without knowing the state, and when the operation of the absorption refrigerator is started in a state where the secondary side is not energized, there is a problem that the operation is wasted.

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、復電時の吸収液循環系
の無駄な運転を防止することを目的とする。
SUMMARY OF THE INVENTION It is an object of the present invention to prevent freezing, generation of crystals and the like in an absorption refrigerator when a power failure occurs, and to prevent useless operation of an absorption liquid circulation system at the time of power recovery.

(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(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)
の運転を濃吸収液の濃度が所定の濃度に至るまで再開さ
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.
It comprises a regenerator (1) having a heat source, a condenser (3), and an evaporator (4) having a refrigerant pump (19) for circulating refrigerant, and supplies cold water cooled by the evaporator (4) to a load. In a control device of an absorption refrigerator having an absorption liquid pump (15) that circulates a chilled water pump (24) and absorbs a refrigerant in an absorber (5) and sends 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 CPU (central processing unit) for restarting the operation of the concentrated absorption liquid until the concentration of the concentrated absorption liquid reaches a predetermined concentration.

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(3
2)から復電信号が出力された際には冷媒ポンプ(1
9)、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)の運転を復電時の濃吸収液
の濃度に基づいて算出される時間再開させる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。
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 operates with the power from the backup power supply (37), inputs a power failure signal, stores the occurrence of a power failure in the memory (33) that operates with power from the backup power supply (37), and generates a power failure in this memory (33). While the power failure detector (3
When the power recovery signal is output from 2), the refrigerant pump (1
9) CPU (central processing unit) that keeps the operation of the chilled water pump (24) and the heat source in a stopped state and restarts the operation of the absorbent pump (15) for a time calculated based on the concentration of the concentrated absorbent at the time of power restoration. ) Is provided.

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(3
2)から復電信号が出力された際には冷媒ポンプ(1
9)、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)の運転を復電時の吸収液の
温度に基づいて算出される時間再開させる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。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 operates with the power from the backup power supply (37), inputs a power failure signal, stores the occurrence of a power failure in the memory (33) that operates with power from the backup power supply (37), and generates a power failure in this memory (33). While the power failure detector (3
When the power recovery signal is output from 2), the refrigerant pump (1
9) CPU (central processing unit) that keeps the operation of the chilled water pump (24) and the heat source stopped and restarts the operation of the absorbent pump (15) based on the temperature of the absorbent when power is restored And a control device for the absorption refrigerator having the following. Is provided.

(ホ)作用 停電後復電したとき、濃吸収液の濃度が所定濃度にな
るまで吸収液の循環系が運転され、吸収液の稀釈運転が
行われ、吸収液濃度が低下するため、吸収液の循環系で
の結晶の発生を防止することが可能になる。
(E) Operation When the power is restored after a power failure, the circulating system of the absorbing solution is operated until the concentration of the concentrated absorbing solution reaches a predetermined concentration, the absorbing solution is diluted, and the absorbing solution concentration is reduced. It is possible to prevent the generation of crystals in the circulation system.

又、停電発生後復電したとき、演算して出された濃液
濃度に基づいて吸収液ポンプ(15)の運転時間が決定さ
れ、この運転時間吸収液ポンプ(15)のみが運転され、
吸収液が吸収液の循環系を循環し、吸収液の濃度が低下
し、吸収液の循環系での結晶発生を防止することが可能
になる。
When the power is restored after the occurrence of the power failure, the operation time of the absorbent pump (15) is determined based on the calculated concentration of the concentrated liquid, and only the operation time of the absorbent pump (15) is operated.
The absorbing solution circulates in the absorbing solution circulating system, the concentration of the absorbing solution decreases, and it becomes possible to prevent the generation of crystals in the absorbing solution circulating system.

更に、停電発生後復電したとき、再生器(1)等の吸
収液循環系の温度に基づいて所定時間吸収液の循環系の
みが運転され、稀釈運転が行われ吸収液の循環系での結
晶発生を防止することが可能になり、又、吸収液循環系
の温度が低いときには、循環系の運転時間が短くなり、
循環系の消費電力を低減することが可能になる。
Further, when the power is restored after the occurrence of the power failure, only the circulating system of the absorbent is operated for a predetermined time based on the temperature of the circulating system of the absorbent such as the regenerator (1), and the dilution operation is performed to perform the dilution operation. Crystal formation can be prevented, and when the temperature of the absorbent circulation system is low, the operation time of the circulation system is shortened,
The power consumption of the circulation system can be reduced.

(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(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).

(30)は吸収冷凍機の制御盤であり、(31)は制御盤
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、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(32)、停電発
生時に停電状態を記憶するメモリ(33)と、停電発生時
の停電時間をカウントするタイマ(34)と、停電検出器
(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CP
U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。
(30) is a control panel of the absorption refrigerator, (31) is a microcomputer arithmetic unit provided in the control panel, and (S) is an operation switch. Then, the microcomputer operation unit (31) has a power failure,
And a power failure detector (32) that operates by detecting a power recovery, a memory (33) that stores a power failure state when a power failure occurs, a timer (34) that counts a power failure time when a power failure occurs, and a power failure detector (32). ), Which operates based on signals from the CPU and outputs signals to a memory (33) and a timer (34).
U) (35), an interface (36), a backup power supply (37), and the like.

(40)は低温再生器(2)出口側の吸収液配管(11)
に設けられ、濃吸収液(以下濃液という)の温度を検出
する濃液温度検出器、(41)は凝縮器(3)出口側の冷
媒配管(17)に設けられ、凝縮温度を検出する凝縮温度
検出器である。これら温度検出器(40),(41)は制御
盤(30)に接続されており、各検出温度に基づいて濃液
濃度がマイコン演算装置(31)にて演算される。
(40) is the low-temperature regenerator (2) the absorbent pipe on the outlet side (11)
And a concentrated liquid temperature detector for detecting the temperature of the concentrated absorption liquid (hereinafter referred to as a concentrated liquid). Reference numeral (41) is provided in the refrigerant pipe (17) on the outlet side of the condenser (3) to detect the condensation temperature. It is a condensation temperature detector. These temperature detectors (40) and (41) are connected to the control panel (30), and the concentration of the concentrated liquid is calculated by the microcomputer arithmetic unit (31) based on each detected temperature.

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)
Is cooled down through a low-temperature heat exchanger (6), sent to an absorber (5), and dispersed.

上記のように吸収冷凍機が運転されているとき、停電
が発生した場合には、吸収液ポンプ(15)、冷媒ポンプ
(19)、が非通電になる。又、停電検出装置(32)が停
電を検出し冷水ポンプ(24)、及び冷却水ポンプ(29)
が非通電になり、停止する。又、加熱量制御弁(21)が
閉じ高温再生器(1)のガスバーナ(1B)が燃焼を停止
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(35)へ停電信号出力す
る。そして、停電信号を入力したCPU(35)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(3
5)にはバックアップ電源(37)から電力が供給され
る。
When a power failure occurs during operation of the absorption refrigerator as described above, the absorption liquid pump (15) and the refrigerant pump (19) are de-energized. In addition, the power failure detection device (32) detects the power failure, and the chilled water pump (24) and the chilled water pump (29)
Is de-energized and stops. Further, the heating amount control valve (21) is closed, the gas burner (1B) of the high temperature regenerator (1) stops burning, and 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 (35). Then, the CPU (35) that has received the power failure signal operates,
A signal is output to the memory (33) and the timer (34), and the fact that a power failure has occurred, that is, a power failure occurrence state is stored in the memory (33), and the timer (34) starts counting the power failure time. Then, the memory (33), the timer (34), and the CPU (3
5) is supplied with power from the 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2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(35)へ出力する。そして、C
PU(35)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
5)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。又、各温度検出器(4
1),(40)からの信号に基づいてマイコン演算装置(3
1)が動作し濃液の濃度が演算される。
If the power has been restored at time (T 2 ) before the predetermined time (for example, 2 hours) 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 (35). And C
The PU (35) 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
5) The signal is output from the timer (34) to the timer (34).
Power outage time is reset. In addition, each temperature detector (4
Based on the signals from (1) and (40), the microcomputer arithmetic unit (3
1) operates and the concentration of the concentrated liquid is calculated.

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。この
稀釈運転により吸収液の濃度が低下し、マイコン演算装
置(31)が各温度検出器(40),(41)の検出温度から
演算する濃液濃度が所定濃度になると、マイコン演算装
置(31)が動作し、吸収液ポンプ(15)の停止信号を出
力する。そして、吸収液ポンプ(15)が停止し、復電時
の稀釈運転が終わる。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、吸収冷凍機は制御盤(30)の運転スイ
ッチ(S)の操作による起動信号を待機する待機状態に
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 the concentration of the absorbent decreases due to the dilution operation, and the concentration of the concentrated liquid calculated by the microcomputer arithmetic unit (31) from the detected temperatures of the temperature detectors (40) and (41) becomes a predetermined concentration, the microcomputer arithmetic unit (31) ) Operates, and outputs a stop signal of the absorbent pump (15). Then, the absorption liquid pump (15) stops, and the dilution operation at the time of power recovery 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 standby state in which it waits for a start signal by operating the operation switch (S) of the control panel (30).

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、又加熱量
制御弁(21)へ開信号が出力され、各ポンプ(15),
(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
定時間ず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 cooling water pump (29), and an open signal is output to the heating amount control valve (21).
(19), (24), (29) and the high-temperature regenerator (1) start operating, and the absorption refrigerator starts operating. Then, when the administrator operates the operation switch (S) to stop the absorption refrigerator, after the high-temperature regenerator (1) is stopped, as shown in FIG. 3, each pump (15), (19) , (24), and (29) are operated at predetermined time intervals to perform a dilution operation.

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
電検知器(32)から復電信号が出力された場合には、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, after that, when the power is restored and a power restoration signal is output from the power failure detector (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(T)がカウントを開始し、停電が
発生してタイマ(34)がカウントアップする前、即ち、
停電が発生してから所定時間が経過する前に復電したと
きには、濃液の濃度が低下するまで吸収液ポンプ(15)
のみが運転され、吸収液が高温再生器(1)、高温熱交
換器(7)、低温再生器(2)、及び低温熱交換器
(6)に循環し、稀釈運転が行われるため、濃液が流れ
る吸収液配管(11),(12)、及び低温熱交換器(6)
にて結晶が発生することを防止できる。又、高温再生器
(1)の温度が高い吸収液を高温再生器(1)から高温
熱交換器(7)、低温再生器(2)、低温熱交換器
(6)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。
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 (T) starts counting, and the power failure occurs. Before the timer (34) counts up,
When the power is restored before the predetermined time has elapsed after the power failure, the absorption pump (15) until the concentration of the concentrated liquid decreases.
Is operated, and the absorbent circulates through the high-temperature regenerator (1), the high-temperature heat exchanger (7), the low-temperature regenerator (2), and the low-temperature heat exchanger (6). Absorbent piping (11), (12) through which liquid flows, and low-temperature heat exchanger (6)
The generation of crystals can be prevented. In addition, the absorbent having a high temperature in the high-temperature regenerator (1) is supplied from the high-temperature regenerator (1) through the high-temperature heat exchanger (7), the low-temperature regenerator (2), and the low-temperature heat exchanger (6). 5), the temperature of the absorber (5) and the evaporator (4) can be increased, and freezing of cold water can be prevented.

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は、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。
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).
When a signal is output to the absorption pump (15), 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.

更に、停電が発生し、復電後の稀釈運転が終わってか
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
機が待機状態であるため、稀釈運転終了後、二次側の設
置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、吸収冷凍機側の冷水ポンプ(24)等の支障を
防止することができる。
Further, after a power failure occurs and after the dilution operation after power recovery is completed, the pumps (15), (19), (24), (29), etc. are not operated, and the operation switch (S) is operated. Since the absorption chiller is in the standby state until the end of the dilution operation, it is possible to prevent the absorption chiller from starting operation regardless of the state of the secondary installation, and the chilled water pump (24) on the absorption chiller side, etc. Can be prevented.

又、復電時、マイコン演算装置(31)で演算された濃
液濃度に基づいて復電時の吸収液ポンプ(15)の運転時
間を決定し、例えば濃液濃度に比例して吸収液ポンプ
(15)の運転時間を長くした場合にも同様の作用効果を
得ることが出来る。
Also, at the time of power recovery, the operation time of the absorbent pump (15) at the time of power recovery is determined based on the concentration of the concentrated liquid calculated by the microcomputer operation device (31). The same operation and effect can be obtained even when the operation time of (15) is lengthened.

又、第1図に示したように高温再生器(2)に温度検
出器(43)を設け、この温度検出器(43)を制御盤(3
0)に接続する。そして、停電発生後に復電したとき高
温再生器(2)の温度を温度検出器(43)により検出
し、検出温度が高い場合には上記実施例と同様に、所定
時間(例えば最大で10分)稀釈運転が行われる。このた
め、上記実施例と同様に低温熱交換器(6)等にて結晶
が発生することを防止できる。又、停電発生後時間が経
過して吸収液の循環系の温度が低下してから復電し、復
電したときに温度検出器(43)の検出温度が所定温度以
下の場合には、稀釈運転が短い時間(例えば2分)行わ
れる。このため、吸収液の循環系の温度が低下し、復電
時の稀釈運転による結晶防止効果が低下したときに吸収
液ポンプ(15)の運転が長い時間行われることを防止で
き、この結果、吸収液ポンプ(15)の消費電力を低減す
ることができる。
Also, as shown in FIG. 1, a temperature detector (43) is provided in the high-temperature regenerator (2), and the temperature detector (43) is connected to the control panel (3).
Connect to 0). Then, when the power is restored after the occurrence of the power failure, the temperature of the high-temperature regenerator (2) is detected by the temperature detector (43), and when the detected temperature is high, a predetermined time (for example, 10 minutes at the maximum) as in the above embodiment. ) Dilution operation is performed. Therefore, it is possible to prevent generation of crystals in the low-temperature heat exchanger (6) and the like as in the above-described embodiment. In addition, when the temperature of the circulating system of the absorbent decreases after a lapse of time after the occurrence of the power failure, power is restored, and when the temperature detected by the temperature detector (43) is lower than the predetermined temperature when the power is restored, dilution is performed. The operation is performed for a short time (for example, 2 minutes). For this reason, when the temperature of the circulating system of the absorbent decreases and the crystallization preventing effect by the dilution operation at the time of power restoration decreases, the operation of the absorbent pump (15) can be prevented from being performed for a long time. Power consumption of the absorption liquid pump (15) can be reduced.

尚、第1図に示したように例えば吸収液配管(12)に
温度検出器(44)を設け、復電時の温度検出器(44)の
検出温度に基づいて吸収液ポンプ(15)の運転時間を制
御しても同様の作用効果を得ることができる。
As shown in FIG. 1, for example, a temperature detector (44) is provided in the absorbent pipe (12), and the temperature of the absorbent pump (15) is determined based on the temperature detected by the temperature detector (44) when power is restored. Even when the operation time is controlled, the same operation and effect can be obtained.

(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、停電後復電したとき、吸収液の循環系のみを
濃液の濃度が所定濃度になるまで運転させるようにした
ため、復電時、濃液の濃度が低下して所定濃度になるま
で吸収液を吸収器、再生器、及び吸収液配管に循環さ
せ、稀釈運転を行うことができ、この結果、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) Effect of the Invention The present invention is a control device for an absorption refrigerator configured as described above, and when power is restored after a power failure, only the circulating system of the absorption liquid is operated until the concentration of the concentrated liquid reaches a predetermined concentration. As a result, at the time of power recovery, the absorption liquid is circulated through the absorber, the regenerator, and the absorption liquid pipe until the concentration of the concentrated liquid decreases to a predetermined concentration, and the dilution operation can be performed. Freezing of cold water and generation of crystals can be prevented.

又、停電後、復電したとき、濃液濃度を演算し、濃液
濃度に基づいて吸収液ポンプの運転時間を決定し、吸収
液ポンプのみを運転させることにより、復電時の濃液濃
度に基づいて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でき、又、復電時の濃液濃度が
低い場合には、吸収液ポンプの運転時間が短くなり、無
駄に稀釈運転が行われることを防止できる。
When the power is restored after a power failure, the concentration of the concentrated liquid is calculated, the operating time of the absorbent pump is determined based on the concentration of the concentrated liquid, and only the absorbing pump is operated. Dilution operation can be performed based on freezing of cold water,
In addition, when the concentration of the concentrated liquid at the time of power recovery is low, the operation time of the absorption liquid pump is shortened, and the wasteful dilution operation can be prevented.

更に、停電発生後復電したとき、再生器等の吸収液の
循環系の温度に基づいて吸収液の循環系の運転時間を決
定することにより、復電時循環系の温度が高いときには
循環系を運転させ稀釈運転を行い、冷水の凍結、及び結
晶の発生を防止することができ、又、復電時循環系の温
度が低いときには、無駄な稀釈運転が行われることを防
止でき、運転コストの低減を図ることができる。
Further, when the power is restored after the occurrence of the power failure, the operation time of the circulating system of the absorbent is determined based on the temperature of the circulating system of the absorbent such as the regenerator. To prevent the cold water from freezing and the generation of crystals.Also, when the temperature of the circulating system is low at the time of power recovery, it is possible to prevent the useless dilution operation from being performed. Can be reduced.

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

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。
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.

Claims (3)

(57)【特許請求の範囲】(57) [Claims] 【請求項1】吸収器、熱源を有する再生器、凝縮器、冷
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
濃吸収液の濃度が所定の濃度に至るまで再開させる中央
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. A central processing unit for keeping the operation of the cold water pump and the heat source in a stopped state and restarting the operation of the absorbent pump until the concentration of the concentrated absorbent reaches a predetermined concentration. Refrigerator control device.
【請求項2】吸収器、熱源を有する再生器、凝縮器、冷
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
復電時の濃吸収液の濃度に基づいて算出される時間再開
させる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 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. A central processing unit that keeps the operation of the chilled water pump and the heat source stopped and restarts the operation of the absorbent pump for a time calculated based on the concentration of the concentrated absorbent at the time of power recovery. Control device for absorption refrigerator.
【請求項3】吸収器、熱源を有する再生器、凝縮器、冷
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
復電時の吸収液の温度に基づいて算出される時間再開さ
せる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。
3. 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 chilled 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. A central processing unit that keeps the operation of the chilled water pump and the heat source in a stopped state and restarts the operation of the absorbent pump for a time calculated based on the temperature of the absorbent when power is restored. The control device of the absorption refrigerator.
JP7140389A 1989-03-23 1989-03-23 Control device for absorption refrigerator Expired - Lifetime JP2752139B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP7140389A JP2752139B2 (en) 1989-03-23 1989-03-23 Control device for absorption refrigerator

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP7140389A JP2752139B2 (en) 1989-03-23 1989-03-23 Control device for absorption refrigerator

Publications (2)

Publication Number Publication Date
JPH02251058A JPH02251058A (en) 1990-10-08
JP2752139B2 true JP2752139B2 (en) 1998-05-18

Family

ID=13459515

Family Applications (1)

Application Number Title Priority Date Filing Date
JP7140389A Expired - Lifetime JP2752139B2 (en) 1989-03-23 1989-03-23 Control device for absorption refrigerator

Country Status (1)

Country Link
JP (1) JP2752139B2 (en)

Also Published As

Publication number Publication date
JPH02251058A (en) 1990-10-08

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