JP2771626B2 - Absorption refrigerator - Google Patents
Absorption refrigeratorInfo
- Publication number
- JP2771626B2 JP2771626B2 JP23515589A JP23515589A JP2771626B2 JP 2771626 B2 JP2771626 B2 JP 2771626B2 JP 23515589 A JP23515589 A JP 23515589A JP 23515589 A JP23515589 A JP 23515589A JP 2771626 B2 JP2771626 B2 JP 2771626B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- heat exchanger
- absorber
- regenerator
- absorbent
- 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 - Fee Related
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に関し、特に熱交換器を備えた吸
収冷凍機に関する。The present invention relates to an absorption refrigerator, and more particularly to an absorption refrigerator having a heat exchanger.
（ロ）従来の技術 例えば特公昭58−24705号公報には吸収器と発生器と
の間に第1,第２熱交換器を設け、吸収器から流出した稀
吸収液と第２発生器から吸収器へ流れる濃吸収液とを第
１熱交換器（低温熱交換器）にて熱交換し、さらに、第
１熱交換器から第１発生器へ流れる稀吸収液と第１発生
器から第２発生器へ流れる中間吸収液とを第２熱交換器
（高温熱交換器）にて熱交換する吸収冷凍機が開示され
ている。(B) Prior art For example, Japanese Patent Publication No. 58-24705 discloses a method in which first and second heat exchangers are provided between an absorber and a generator, and a rare absorbing solution flowing out of the absorber and a second generator are provided. The concentrated absorbent flowing into the absorber exchanges heat with the first heat exchanger (low-temperature heat exchanger), and the diluted absorbent flowing from the first heat exchanger to the first generator and the second absorbent flows into the first generator. There is disclosed an absorption refrigerator in which heat is exchanged with an intermediate absorption liquid flowing to a second generator in a second heat exchanger (high-temperature heat exchanger).
（ハ）発明が解決しようとする課題 上記従来の技術にて説明した吸収冷凍機において、第
１熱交換器にて濃吸収液が結晶し、この結晶により第１
熱交換器又は第２熱交換器の伝熱管の内径が小さくな
る。そして、濃吸収液又は中間吸収液の流量が減少して
第１熱交換器又は第２熱交換器での濃吸収液又は中間吸
収液と稀吸収液との熱交換量を減少するため、そのまま
で吸収冷凍機を運転した場合には、第１熱交換器、第２
熱交換器を介して第１発生器へ送られる稀吸収液の温度
が低下して第１発生器での加熱量が増加して運転効率が
低下するという問題が発生していた。(C) Problems to be Solved by the Invention In the absorption refrigerator described in the above-described conventional technique, the concentrated absorption liquid crystallizes in the first heat exchanger, and the crystal causes the first absorption liquid to crystallize.
The inside diameter of the heat exchanger tube of the heat exchanger or the second heat exchanger is reduced. Then, the flow rate of the concentrated absorbing solution or the intermediate absorbing solution is reduced and the amount of heat exchange between the concentrated absorbing solution or the intermediate absorbing solution and the diluted absorbing solution in the first heat exchanger or the second heat exchanger is reduced. When the absorption chiller is operated at the first heat exchanger and the second heat exchanger,
There has been a problem that the temperature of the dilute absorption liquid sent to the first generator via the heat exchanger decreases, the amount of heating in the first generator increases, and the operating efficiency decreases.
本発明は熱交換器での熱交換量の低下を管理者などに
報知し、成績係数の大幅な低下を防止することを目的と
する。An object of the present invention is to notify a manager or the like of a decrease in the amount of heat exchange in a heat exchanger and prevent a significant decrease in the coefficient of performance.
（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）の
出口側の吸収液温度と高温再生器（１）の入口側の吸収
液温度との差と蒸発器（４）の冷水負荷に応じて変化す
る冷水出入口の温度差との比率を算出し、この比率と設
定値とを比較して信号を出力する制御装置（35）と、こ
の制御装置（35）からの信号を入力して動作する報知器
（36）とを備えた吸収冷凍機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 provides a method for measuring the difference between the temperature of the absorbent at the outlet of the absorber (5) and the temperature of the absorbent at the inlet of the high temperature regenerator (1). A control device (35) for calculating a ratio between the temperature difference of the chilled water inlet and outlet, which varies according to the chilled water load of the evaporator (4), and comparing the ratio with a set value to output a signal; The present invention provides an absorption refrigerator including an alarm (36) that operates by inputting a signal from (35).
又、低温熱交換器（６）の入口側の吸収液温度と高温
熱交換器（７）の出口側の吸収液温度との差と蒸発器
（４）の冷水出入口の温度差との比率を算出し、この比
率と設定値とを比較して信号を出力する制御装置（35）
と、この制御装置（35）からの信号を入力して動作する
報知器（36）とを備えた吸収冷凍機を提供するものであ
る。The ratio of the difference between the temperature of the absorbent at the inlet of the low-temperature heat exchanger (6) and the temperature of the absorbent at the outlet of the high-temperature heat exchanger (7) and the temperature difference at the cold water inlet and outlet of the evaporator (4) is calculated. A control device that calculates, compares this ratio with a set value, and outputs a signal (35)
And an alarm (36) that operates by inputting a signal from the control device (35).
（ホ）作用 吸収冷凍機の運転時、例えば冷却水温度の低下により
吸収器（５）から流出する稀吸収液の温度が低下し、低
温再生器（２）から流れて来た濃吸収液の温度が低温熱
交換器（６）にて大幅に低下すると、結晶が発生し、低
温熱交換器（５）を流れる濃吸収液の量が減少する。そ
して、吸収器（５）出口側の稀吸収液の温度と高温再生
器（１）の入口側稀吸収液温度との差が減少し、この差
に対する冷却水出入口温度の差の比率が15以下になると
制御装置（35）が報知器（36）に信号を出力する。そし
て、報知器（36）が動作して管理者に低温熱交換器
（６）又は高温熱交換器（７）での熱交換量の減少を知
らせることが可能になる。又、制御装置（35）は冷水出
入口温度度差と稀吸収液温度差との比率と設定値とを比
較して報知器（36）へ信号を出力し、負荷が変化して冷
水出入口温度差、稀吸収液温度差が変化した場合にも、
報知器（36）の誤動作を防止することが可能になる。(E) Action During operation of the absorption refrigerator, for example, the temperature of the diluted absorbent flowing out of the absorber (5) decreases due to a decrease in the temperature of the cooling water, and the concentration of the concentrated absorbent flowing from the low-temperature regenerator (2) decreases. When the temperature is significantly reduced in the low-temperature heat exchanger (6), crystals are generated, and the amount of the concentrated absorbent flowing through the low-temperature heat exchanger (5) decreases. Then, the difference between the temperature of the diluted absorbent at the outlet side of the absorber (5) and the temperature of the diluted absorbent at the inlet side of the high-temperature regenerator (1) decreases, and the ratio of the difference of the cooling water inlet / outlet temperature to this difference is 15 or less. Then, the control device (35) outputs a signal to the alarm (36). Then, the annunciator (36) operates to notify the administrator of a decrease in the amount of heat exchange in the low-temperature heat exchanger (6) or the high-temperature heat exchanger (7). Also, the control device (35) compares the ratio between the chilled water inlet / outlet temperature difference and the diluted absorbent temperature difference and the set value and outputs a signal to the alarm (36). , Even if the temperature of the rare absorbing solution changes,
Malfunction of the alarm (36) can be prevented.
又は、吸収冷凍機の運転時、例えば低温熱交換器
（６）に結晶は発生し、この結晶により低温熱交換器
（６）を流れる濃吸収液の量が減少すると、低温熱交換
器（６）での稀吸収液と濃吸収液との熱交換量が減少す
る。このため、低温熱交換器入口側の稀吸収液温度と高
温熱交換器（７）出口側の稀吸収液温度との差が減少す
る。すると、この稀吸収液温度差に対する冷水出入口温
度差の比率が減少し、この比率が15以下になると、制御
装置（35）が報知信号を出力し、報知器（36）が動作し
て管理者に低温熱交換器（６）、又は高温熱交換器
（７）での熱交換量の減少を知らせることが可能にな
り、又、負荷の変動により稀吸収液温度差が変化した場
合にも報知器（36）の誤動作を防止することが可能にな
る。Alternatively, when the absorption refrigerator is operated, for example, crystals are generated in the low-temperature heat exchanger (6), and when the amount of the concentrated absorbent flowing through the low-temperature heat exchanger (6) decreases due to the crystals, the low-temperature heat exchanger (6) is generated. In (2), the amount of heat exchange between the rare absorbing solution and the concentrated absorbing solution is reduced. Therefore, the difference between the temperature of the diluted absorbent at the inlet of the low-temperature heat exchanger and the temperature of the diluted absorbent at the outlet of the high-temperature heat exchanger (7) is reduced. Then, the ratio of the chilled water inlet / outlet temperature difference to the diluted absorbent temperature difference decreases. When the ratio becomes 15 or less, the control device (35) outputs a notification signal, and the notification device (36) operates to activate the manager. To notify the decrease in the amount of heat exchange in the low-temperature heat exchanger (6) or the high-temperature heat exchanger (7). It is possible to prevent the malfunction of the container (36).
（へ）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、（8A），（8B），（8C）、
及び（９）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）、及び凝縮器熱交換器
（27）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) evaporator, (5) absorber, (6) low temperature heat exchanger, (7) high temperature heat exchanger, (8A), (8B), (8C),
And (9) to (12) are connected to the absorbent pipe, (15) is the absorbent pump, (16) to (18) are the refrigerant pipe, (19) is the refrigerant pump, and (20) is connected to the gas burner (1B). (21) is a heating amount control valve, (22) is a cold water pipe,
Each is connected by piping as shown in FIG.
Also, (25) is a cooling water pipe, and this cooling water pipe (25)
In the middle of the process, an absorber heat exchanger (26) and a condenser heat exchanger (27) are provided.
（31），（32）はそれぞれ冷却水配管（22）の蒸発器
（４）の入口側、及び出口側に取付けられた冷水入口温
度検出器（以下第１温度検出器という）、及び冷水出口
温度検出器（以下第２温度検出器という）である。又、
（33）は吸収液配管（8A）に取付けられ吸収器（５）出
口側の稀吸収液温度を検出する温度検出器（以下、第３
温度検出器という）、（34）は吸収液配管（8C）に取付
けられ、高温再生器（１）入口側の稀吸収液温度を検出
する温度検出器（以下第４温度検出器という）である。
さらに、（35）は各温度検出器（31），（32），（3
3），（34）から信号を入力して動作する制御装置であ
り、（35）は制御装置（35）からの信号を入力して動作
する報知器である。そして、この報知器（36）は複数の
発光素子から構成された表示器（37）と、ブザー（38）
とから構成されている。ここで、報知器（36）は吸収冷
凍機の制御盤（図示せず）、又は吸収冷凍機の管理室な
どに設けられている。(31) and (32) are chilled water inlet temperature detectors (hereinafter referred to as first temperature detectors) and chilled water outlets attached to the inlet side and the outlet side of the evaporator (4) of the cooling water pipe (22), respectively. It is a temperature detector (hereinafter, referred to as a second temperature detector). or,
(33) is a temperature detector attached to the absorbent pipe (8A) and detecting the temperature of the diluted absorbent at the outlet of the absorber (5) (hereinafter referred to as the third detector).
(34) is a temperature detector (hereinafter referred to as a fourth temperature detector) which is attached to the absorbent pipe (8C) and detects the temperature of the diluted absorbent at the inlet side of the high temperature regenerator (1). .
Furthermore, (35) is the temperature detector (31), (32), (3
3) and (34) are control devices that operate by inputting signals, and (35) is an annunciator that operates by inputting signals from the control device (35). The annunciator (36) includes a display (37) composed of a plurality of light emitting elements, and a buzzer (38).
It is composed of Here, the annunciator (36) is provided in a control panel (not shown) of the absorption refrigerator, a control room of the absorption refrigerator, or the like.
以下、上記制御装置（35）について第２図に基づいて
詳細に説明する。ここで、第１図と同じものには同じ図
番を付し、その詳細な説明は省略する。制御装置（35）
はマイクロコンピュータにより構成されており、（40）
は各温度検出器からの信号を変換して出力する入力イン
ターフェイス、（41）は入力インターフェイス（40）か
ら出力された信号を入力して動作する中央処理装置（以
下CPUという）である。又、（42）は記憶素子（以下ROM
という）であり、ROM（42）には冷水入口温度と冷水出
口温度との差、即ち冷水温度差を演算するプログラム、
吸収器（５）出口側の稀吸収液温度と高温再生器（１）
入口側の稀吸収液温度との差、即ち稀吸収液温度差を演
算するプログラム、上記冷水温度差に対する稀吸収液温
度差の比率を演算するプログラム、及び上記比率と設定
値とを比較するプログラムなどが記憶されている。又、
（43）は各温度検出器（31），（32），（33），（34）
により検出された温度データを一時記憶する記憶素子
（以下RAMという）であり、（44）はCPU（41）から出力
された信号を変換して出力する出力インターフェイスで
ある。そして、出力インターフェイス（44）から報知器
（36）へ信号が出力される。又、（45）は所定時間（例
えば１分）ごとに信号を出力するCLOCKである。Hereinafter, the control device (35) will be described in detail with reference to FIG. Here, the same components as those in FIG. 1 are denoted by the same reference numerals, and detailed description thereof is omitted. Control device (35)
Consists of a microcomputer, (40)
Is an input interface for converting and outputting a signal from each temperature detector, and (41) is a central processing unit (hereinafter referred to as a CPU) which operates by receiving a signal output from the input interface (40). (42) is a storage element (hereinafter referred to as ROM
The ROM (42) has a program for calculating a difference between the chilled water inlet temperature and the chilled water outlet temperature, that is, a chilled water temperature difference,
Absorber (5) Rare absorbent temperature at outlet and high temperature regenerator (1)
A program for calculating the difference between the temperature of the diluted absorbent at the inlet side, that is, a temperature difference for the diluted absorbent, a program for calculating the ratio of the temperature difference of the diluted absorbent to the temperature difference of the chilled water, and a program for comparing the ratio with the set value Are stored. or,
(43) is each temperature detector (31), (32), (33), (34)
Is a storage element (hereinafter referred to as RAM) for temporarily storing the temperature data detected by the CPU, and an output interface (44) converts and outputs a signal output from the CPU (41). Then, a signal is output from the output interface (44) to the alarm (36). A clock (45) outputs a signal every predetermined time (for example, one minute).
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、冷媒が冷水配管（2
2）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が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）、及び高温
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）へ入る。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
冷媒蒸気によって加熱され、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（以下濃度とい
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) flows to the condenser (3) via the low-temperature regenerator (2) as in the conventional absorption refrigerator, and then flows into the condenser heat exchanger (27). ) Is condensed and liquefied by exchanging heat with the flowing water, and then flows to the evaporator (4) via the refrigerant pipe (17). And the refrigerant is cold water piping (2
2) The water in the cold water pipe (22) is cooled by heat exchange with the water in the pipe and evaporated 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 absorbing liquid whose concentration has been reduced 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 operating the absorbing liquid pump (15). Can be The absorbing liquid entering the high-temperature regenerator (1) is heated by the burner (1B), the refrigerant evaporates, and the medium-concentration absorbing liquid 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. The absorption liquid having a high concentration (hereinafter referred to as “concentration”) is reduced in temperature through the low-temperature heat exchanger (6), sent to the absorber (5), and dispersed.
以上のように吸収冷凍機が運転されているとき各温度
検出器、（31），（32），（33），（34）が冷水温度、
及び稀吸収液の温度を検出する。以下、制御装置（35）
の動作について第３図のフローチャートに基づいて説明
する。吸収冷凍機の運転時、各温度検出器（31），（3
2），（33），（34）が検出した温度データは入力イン
ターフェイス（40）、CPU（41）を介してRAM（43）に記
憶される。そして、CLOCK（45）がカウントアップして
信号をCPU（41）へ出力すると、この信号に基づいてCPU
（41）が動作してRAM（43）から温度データを読み込
む。又、CPU（41）がROM（42）から上記各プログラムを
読み込み動作し、冷水温度差、稀吸収液温度差、及び冷
水温度差に対する稀吸収液温度差の比率を算出する。こ
こで、負荷が例えば100％であり冷水出入口温度差が５
℃、吸収器（４）出口側の稀吸収液温度が40℃、高温再
生器（１）入口側の稀吸収液温度140℃で稀吸収液温度
差が100℃のときには冷水温度差に対する稀吸収液温度
差の比率は になる。そして、ROM（42）に記憶されていた設定値例
えば15と算出された比率20とがCPU（41）に比較され、
算出された比率が設定値より大きいときにはCPU（41）
は出力インターフェイス（44）へ信号を出力せず、出力
インターフェイス（44）から報知信号が出力されない。
このため、報知器（36）は動作しない。As described above, when the absorption chiller is operating, each temperature sensor, (31), (32), (33), and (34) indicate the cold water temperature,
And the temperature of the diluted absorbing solution is detected. Below, the control device (35)
3 will be described with reference to the flowchart of FIG. During operation of the absorption refrigerator, each temperature detector (31), (3
2) The temperature data detected by (33) and (34) is stored in the RAM (43) via the input interface (40) and the CPU (41). When the CLOCK (45) counts up and outputs a signal to the CPU (41), the CPU
(41) operates to read the temperature data from the RAM (43). Further, the CPU (41) reads and executes the above programs from the ROM (42) to calculate the chilled water temperature difference, the diluted absorbent temperature difference, and the ratio of the diluted water temperature difference to the chilled water temperature difference. Here, for example, when the load is 100% and the temperature difference between the cold water
C, Absorber (4) When the temperature of the diluted absorbent at the outlet side is 40 ° C, and at the high temperature regenerator (1) The temperature of the diluted absorbent at the inlet is 140 ° C and the temperature difference of the diluted absorbent is 100 ° C. The ratio of the liquid temperature difference is become. Then, the CPU (41) compares the set value, for example, 15 stored in the ROM (42) with the calculated ratio 20, and
CPU (41) when the calculated ratio is larger than the set value
Does not output a signal to the output interface (44), and does not output a notification signal from the output interface (44).
Therefore, the alarm (36) does not operate.
その後、負荷がほとんど変化せず冷水出入口温度差が
５℃で変化していないとき、例えば低温熱交換器（６）
を流れる稀吸収液の温度が低下し、濃吸収液の温度が大
幅に低下した場合、低温熱交換器（６）にて濃吸収液が
結晶する。そして、この結晶のために、低温熱交換器
（６）の熱交換パイプ（図示せず）の内径が次第に減少
すると、低温熱交換器（６）を流れる濃吸収液の量が減
少する。又、低温熱交換器（６）内のヘドロによっても
濃吸収液の流量が減少する。そして、濃吸収液と稀吸収
液との熱交換量が減少する。このため。例えば稀吸収液
温度差が減少して例えば上記100℃から75℃になり、冷
水温度差に対する稀吸収液温度差の比率が になるとCPU（41）は出力インターフェイス（44）へ信
号を出力する。そして、出力インターフェイス（44）は
この信号に基づいて報知信号を報知器（36）へ出力す
る。報知器（36）は報知信号を入力すると動作し、表示
器（37）にて例えばALARMの文字が点滅するとともにブ
ザー（38）が発音する。そして、管理者が表示器（37）
の文字の点滅、又はブザー（38）の発音により低温熱交
換器（６）又は高温熱交換器（７）の熱交換量の減少を
知り、例えば吸収冷凍機の運転停止中に各熱交換器の点
滅が行われ、低温熱交換器（６）の交換作業等が行われ
る。又、高温熱交換器（７）に結晶が発生し、熱交換量
が減少して稀吸収液温度差が減少し、冷水温度差に対す
る稀吸収液温度差の比率が15以下になると、制御装置
（35）が報知信号を出力し、報知器（36）が動作する。
そして、上記と同様に点検等が行われる。Thereafter, when the load hardly changes and the cold water inlet / outlet temperature difference does not change at 5 ° C., for example, the low-temperature heat exchanger (6)
When the temperature of the rare absorbing liquid flowing through the chiller drops and the temperature of the concentrated absorbing liquid drops significantly, the concentrated absorbing liquid crystallizes in the low-temperature heat exchanger (6). When the inside diameter of the heat exchange pipe (not shown) of the low-temperature heat exchanger (6) gradually decreases due to the crystals, the amount of the concentrated absorbent flowing through the low-temperature heat exchanger (6) decreases. Further, the sludge in the low-temperature heat exchanger (6) also reduces the flow rate of the concentrated absorbent. Then, the amount of heat exchange between the concentrated absorption liquid and the diluted absorption liquid decreases. For this reason. For example, the temperature difference of the rare absorbing solution decreases from, for example, 100 ° C. to 75 ° C., and the ratio of the temperature difference of the rare absorbing solution to the temperature difference of the cold water becomes Then, the CPU (41) outputs a signal to the output interface (44). Then, the output interface (44) outputs a report signal to the reporter (36) based on this signal. The annunciator (36) operates upon input of the annunciating signal, and, for example, the ALARM blinks on the display (37) and the buzzer (38) sounds. Then, the administrator displays (37)
Flashing or sounding of a buzzer (38) indicates that the amount of heat exchange in the low-temperature heat exchanger (6) or the high-temperature heat exchanger (7) has decreased. Blinks, and the replacement operation of the low-temperature heat exchanger (6) and the like are performed. Further, when crystals are generated in the high-temperature heat exchanger (7), the amount of heat exchange is reduced and the temperature difference of the diluted absorbent is reduced, and the ratio of the temperature difference of the diluted absorbent to the temperature of the cold water becomes 15 or less. (35) outputs a notification signal, and the notification device (36) operates.
Then, inspection and the like are performed in the same manner as described above.
又、負荷と冷水出入口温度差とはほぼ比例し、例えば
負荷が80％のときには冷水出入口温度差は４℃、負荷が
60％のときには冷水出入口温度差は３℃になる。又、負
荷の減少に伴ない高温再生器（１）の加熱量も減少し、
高温再生器（１）から高温熱交換器（７）、及び低温再
生器（２）を経て低温熱交換器（６）へ流れる中間吸収
液、及び濃吸収液の温度が低下する。そして、稀吸収液
温度差も減少し、例えば負荷が80％のとき稀吸収液温度
差が例えば80℃に低下し、冷水温度差に対する稀吸収液
温度差の比率が であり、設定値より大きいときにはCPU（41）は出力イ
ンターフェイス（44）へ信号を出力せず、報知器（36）
は動作しない。又、稀吸収液温度差が例えば64℃であ
り、負荷が100％のときには報知器（36）が動作する温
度になった場合にも、負荷が80％の場合には上記比率が であるため、CPU（41）は信号を出力せず、報知器（3
6）は動作しない。又、低温熱交換器（６）にて結晶が
発生して低温熱交換器（６）での熱交換量が減少して稀
吸収液温度差が減少して60℃以下になり、上記比率が になったときにはCPU（41）は出力インターフェイス（4
4）へ信号を出力する。そして、出力インターフェイス
（44）が報知信号を報知器（36）へ出力し、報知器（3
6）は上記負荷が100％のときと同様に動作する。The load and the chilled water inlet / outlet temperature difference are almost proportional. For example, when the load is 80%, the chilled water inlet / outlet temperature difference is 4 ° C.
At 60%, the temperature difference between the cold water inlet and outlet is 3 ° C. In addition, the heating amount of the high-temperature regenerator (1) also decreases with a decrease in load,
The temperatures of the intermediate absorbent and the concentrated absorbent flowing from the high temperature regenerator (1) to the low temperature heat exchanger (6) via the high temperature heat exchanger (7) and the low temperature regenerator (2) are reduced. The temperature difference of the diluted absorbent also decreases, for example, when the load is 80%, the temperature difference of the diluted absorbent decreases to, for example, 80 ° C., and the ratio of the temperature difference of the diluted absorbent to the temperature difference of the cold water becomes When the value is larger than the set value, the CPU (41) does not output a signal to the output interface (44), and the alarm (36)
Does not work. Further, when the temperature difference of the diluted absorbing liquid is, for example, 64 ° C. and the load is 100%, the temperature becomes the temperature at which the annunciator (36) operates. Therefore, the CPU (41) does not output a signal, and the annunciator (3)
6) does not work. Also, crystals are generated in the low-temperature heat exchanger (6), the amount of heat exchange in the low-temperature heat exchanger (6) is reduced, and the temperature difference of the diluted absorbent is reduced to 60 ° C. or less. Is reached, the CPU (41) switches to the output interface (4
Output signal to 4). Then, the output interface (44) outputs an alarm signal to the alarm (36), and outputs the alarm signal (3
6) works the same as when the load is 100%.
又、負荷が例えば60％の場合（冷水出入口温度差は３
℃）には、稀吸収液温度差が45℃以下になり冷水出入口
温度差に対する稀吸収液温度差が になったときにCPU（41）が出力インターフェイス（4
4）へ信号を出力し、報知器（36）が動作する。If the load is, for example, 60% (the temperature difference between the cold water
° C), the temperature difference between the diluted absorbent and the cold water inlet / outlet temperature difference is 45 ° C or less. When the CPU (41) comes to the output interface (4
A signal is output to 4), and the alarm (36) operates.
以下、同様に負荷が変化した場合にも、冷水出入口温
度差に対する稀吸収液温度差が15以下になったときには
CPU（41）が出力インターフェイス（44）へ信号を出力
し、報知器（36）が動作する。Hereinafter, even when the load changes, when the temperature difference of the diluted absorbent with respect to the temperature difference of the cold water inlet / outlet becomes 15 or less.
The CPU (41) outputs a signal to the output interface (44), and the alarm (36) operates.
上記実施例によれば、吸収冷凍機の運転中に、低温熱
交換器（６）又は高温熱交換器（７）にて結晶が発生
し、低温熱交換器（６）、又は高温熱交換器（７）を流
れる吸収液の量が減少し、濃吸収液又は中間吸収液と稀
吸収液との熱交換量が減少し、冷水出入口温度差に対す
る稀吸収液温度差の比率が設定値以下になった場合に
は、制御装置（35）から報知器（36）へ報知信号が出力
され、この信号を入力した報知器（36）が動作するの
で、低温熱交換器（６）の熱交換量の減少を管理者に知
らせることができ、管理者は低温熱交換器（６）又は高
温熱交換器（７）の熱交換量が大幅に低下して、吸収冷
凍機の成績係数が大幅に低下する前に点検を行い、低温
熱交換器（６）、又は高温熱交換器の交換を行うことが
できる。According to the above embodiment, during operation of the absorption refrigerator, crystals are generated in the low-temperature heat exchanger (6) or the high-temperature heat exchanger (7), and the low-temperature heat exchanger (6) or the high-temperature heat exchanger is formed. (7) The amount of the absorbing liquid flowing through decreases, the amount of heat exchange between the concentrated absorbing liquid or the intermediate absorbing liquid and the dilute absorbing liquid decreases, and the ratio of the temperature difference of the dilute absorbing liquid to the temperature difference of the cold water inlet and outlet falls below the set value. If this happens, a notification signal is output from the control device (35) to the alarm (36), and the alarm (36) that receives this signal operates, so that the heat exchange amount of the low-temperature heat exchanger (6) Can be notified to the administrator, and the administrator can significantly reduce the heat exchange amount of the low-temperature heat exchanger (6) or the high-temperature heat exchanger (7), and the coefficient of performance of the absorption refrigerator significantly decreases. Inspection can be carried out before replacing the low-temperature heat exchanger (6) or the high-temperature heat exchanger.
又、負荷の変化に応じて変化する冷水出入口温度差に
対する稀吸収液温度差との比率と設定値とを比較して報
知器（36）を動作させるため、負荷が減少して稀吸収液
温度差が減少したときの報知器（36）の誤動作を回避す
ることができる。In addition, since the alarm (36) is operated by comparing the ratio of the temperature difference of the rare absorbing liquid to the temperature difference of the inlet and outlet of the cold water which changes according to the load and the set value, the load is reduced and the temperature of the rare absorbing liquid decreases. Malfunction of the alarm (36) when the difference decreases can be avoided.
尚、上記実施例において第3,第４温度検出器（33），
（34）をそれぞれ吸収液配管（8A），（8C）に取付けた
が、第３温度検出器（33）を吸収器（５）の吸収液溜り
（5A）に取付けても、又、第４温度検出器（34）を吸収
液配管（8B）を設けても良い。ここで、第４温度検出器
（34）を吸収液配管（8B）に設けた場合には、報知器
（36）を動作させるときの冷水出入口温度差に対する稀
吸収液温度差の比率を上記実施例の15より小さく設定す
る。又、上記実施例において、報知器（36）を動作させ
るときの冷水出入口温度差に対する稀吸収液温度差の比
率を15と設定したが、この設定値は15に限定されるもの
ではない。In the above embodiment, the third and fourth temperature detectors (33),
(34) was attached to the absorbent pipes (8A) and (8C), respectively. However, if the third temperature detector (33) was attached to the absorbent reservoir (5A) of the absorber (5), The temperature detector (34) may be provided with an absorbent pipe (8B). Here, in the case where the fourth temperature detector (34) is provided in the absorbent pipe (8B), the ratio of the rare absorbent liquid difference to the cold water inlet / outlet port temperature difference when the alarm (36) is operated is determined as described above. Set smaller than 15 in the example. Further, in the above embodiment, the ratio of the temperature difference of the rare absorbing liquid to the temperature difference of the cold water inlet and outlet when operating the alarm (36) is set to 15, but this set value is not limited to 15.
（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であり、
吸収器の出口側の吸収液温度と再生器の入口側の吸収液
温度との差と蒸発器の冷水出入口温度差などの冷水負荷
の変化に応じて変化する物理量との比率を算出し、この
比率と設定値とを比較して制御装置が信号を出力し、こ
の信号により報知器が動作するので、吸収器と再生器と
の間の熱交換器に結晶などが発生して熱交換量が減少し
たときには、管理者などに報知器により知らせることが
でき、吸収冷凍機の成績係数が大幅に低下する前に熱交
換器の点検作業などを行うことができる。又、負荷によ
り変化する冷水出入口温度差と上記吸収液の温度差との
比率を算出して、この比率により制御装置が信号を出力
するため、負荷が変化して冷水出入口温度差が変化した
場合にも報知器の誤動作が防止できる。(G) Effects of the Invention The present invention is an absorption refrigerator configured as described above,
The ratio between the difference between the temperature of the absorbent on the outlet side of the absorber and the temperature of the absorbent on the inlet side of the regenerator and the physical quantity that changes according to changes in the chilled water load, such as the difference between the chilled water inlet and outlet temperatures of the evaporator, is calculated. The control device outputs a signal by comparing the ratio with the set value, and the alarm operates according to the signal, so that crystals and the like are generated in the heat exchanger between the absorber and the regenerator, and the heat exchange amount is reduced. When the number decreases, a manager or the like can be notified by an alarm, and inspection work of the heat exchanger can be performed before the coefficient of performance of the absorption refrigerator significantly decreases. In addition, when the ratio of the chilled water inlet / outlet temperature difference that changes due to the load and the temperature difference of the absorbent is calculated, and the controller outputs a signal based on this ratio, the load changes and the chilled water inlet / outlet temperature difference changes. In addition, malfunction of the alarm can be prevented.
又、吸収器と再生器との間に設けられた熱交換器の入
口側吸収液温度と出口側吸収液温度との差と蒸発器の冷
水出入口温度の差との比率を算出し、この比率と設定値
とを比較して制御装置が信号を出力し、この信号により
報知器が動作するので、熱交換器の熱交換量が減少した
ときには管理者などに報知でき、吸収冷凍機の成績係数
が大幅に低下する前に熱交換器の点検作業等を行うこと
ができ、又、負荷が変化した場合の報知器の誤動作を防
止することができる。In addition, the ratio of the difference between the inlet-side absorbent temperature and the outlet-side absorbent temperature of the heat exchanger provided between the absorber and the regenerator and the difference between the cold water inlet / outlet temperature of the evaporator is calculated. The control device outputs a signal by comparing with the set value, and the alarm is operated by this signal, so that when the heat exchange amount of the heat exchanger decreases, it can be notified to the administrator etc., and the coefficient of performance of the absorption refrigerator Inspection work etc. of the heat exchanger can be performed before the temperature of the alarm greatly decreases, and malfunction of the alarm when the load changes can be prevented.
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図は制御装置のブロック・ダイヤグラム、第３
図は報知器の動作を説明するためのフローチャートであ
る。 （１）…高温再生器、（４）…蒸発器、（５）…吸収
器、（６）…低温熱交換器、（35）…制御装置、（36）
…報知器。FIG. 1 is a circuit diagram of an absorption refrigerator showing one embodiment of the present invention, FIG. 2 is a block diagram of a control device, FIG.
The figure is a flowchart for explaining the operation of the alarm. (1) high-temperature regenerator, (4) evaporator, (5) absorber, (6) low-temperature heat exchanger, (35) controller, (36)
… An alarm.
Claims (3)
間に設けられ吸収器から再生器へ流れる吸収液と再生器
から吸収器へ流れる吸収液とを熱交換する熱交換器、及
び蒸発器をそれぞれ配管接続してなる吸収冷凍機におい
て、吸収器の出口側の吸収液温度と再生器の入口側の吸
収液温度との差と蒸発器の冷水出入口の温度差との比率
を算出し、この比率と設定値とを比較して信号を出力す
る制御装置と、この制御装置からの信号を入力信号とし
て動作する報知器とを備えたことを特徴とする吸収冷凍
機。1. An absorber, a regenerator, and a heat exchanger provided between the regenerator and the absorber for exchanging heat between the absorbent flowing from the absorber to the regenerator and the absorbent flowing from the regenerator to the absorber. And the ratio of the difference between the temperature of the absorbent on the outlet side of the absorber and the temperature of the absorbent on the inlet side of the regenerator and the difference in temperature of the cold water inlet and outlet of the evaporator in an absorption refrigerator in which the evaporator is connected by pipes. And a control device for calculating the ratio, comparing the ratio with a set value and outputting a signal, and an alarm operating as a signal from the control device as an input signal.
設けられ、吸収器から再生器へ流れる吸収液と再生器か
ら吸収器へ流れる吸収液とを熱交換する熱交換器、及び
蒸発器をそれぞれ配管接続した吸収冷凍機において、熱
交換器の吸収液入口側温度と吸収液出口側温度との差と
蒸発器の冷水出入口温度差との比率を算出し、この比率
と設定値とを比較して信号を出力する制御装置と、この
制御装置から信号を入力して動作する報知器とを備えた
ことを特徴とする吸収冷凍機。2. A heat exchanger provided between the absorber and the regenerator and between the absorber and the regenerator for heat exchange between the absorbent flowing from the absorber to the regenerator and the absorbent flowing from the regenerator to the absorber. In an absorption refrigerator in which an evaporator is connected to each pipe, a ratio of a difference between an absorption liquid inlet side temperature and an absorption liquid outlet side temperature of the heat exchanger and a chilled water inlet / outlet temperature difference of the evaporator is calculated. An absorption refrigerator comprising: a control device that compares a set value to output a signal; and an alarm that operates by inputting a signal from the control device.
間に設けられた熱交換器、及び蒸発器などをそれぞれ配
管接続し、吸収器と再生器との間に熱交換器を設けた吸
収冷凍機において、熱交換器の入口側の吸収液温度と出
口側の吸収液温度との差と蒸発器の冷水負荷に応じて変
化する物理量との比率を算出し、この比率と設定値とを
比較して信号を出力する制御装置と、この制御装置から
信号を入力して動作する報知器とを備えたことを特徴と
する吸収冷凍機。3. An absorber, a regenerator, a heat exchanger provided between the regenerator and the absorber, an evaporator, and the like are connected by piping, respectively, and a heat exchanger is provided between the absorber and the regenerator. In the absorption refrigerator provided with, the ratio of the difference between the absorption liquid temperature on the inlet side of the heat exchanger and the absorption liquid temperature on the outlet side and the physical quantity that changes according to the cold water load of the evaporator is calculated. An absorption refrigerator comprising: a control device that compares a set value to output a signal; and an alarm that operates by inputting a signal from the control device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23515589A JP2771626B2 (en) | 1989-09-11 | 1989-09-11 | Absorption refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP23515589A JP2771626B2 (en) | 1989-09-11 | 1989-09-11 | Absorption refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0399168A JPH0399168A (en) | 1991-04-24 |
| JP2771626B2 true JP2771626B2 (en) | 1998-07-02 |
Family
ID=16981865
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP23515589A Expired - Fee Related JP2771626B2 (en) | 1989-09-11 | 1989-09-11 | Absorption refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2771626B2 (en) |
-
1989
- 1989-09-11 JP JP23515589A patent/JP2771626B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0399168A (en) | 1991-04-24 |
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