JPH0827095B2 - Absorption refrigerator dilution operation device - Google Patents
Absorption refrigerator dilution operation deviceInfo
- Publication number
- JPH0827095B2 JPH0827095B2 JP28360987A JP28360987A JPH0827095B2 JP H0827095 B2 JPH0827095 B2 JP H0827095B2 JP 28360987 A JP28360987 A JP 28360987A JP 28360987 A JP28360987 A JP 28360987A JP H0827095 B2 JPH0827095 B2 JP H0827095B2
- Authority
- JP
- Japan
- Prior art keywords
- concentration
- absorbing liquid
- dilution operation
- detector
- absorption refrigerator
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- 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 本発明は臭化リチウム水溶液その他の塩類溶液を吸収
液に用いた吸収ヒートポンプや吸収冷凍機など（以下、
吸収冷凍機という）の吸収液の稀釈運転装置に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an absorption heat pump, an absorption refrigerator, etc. using an aqueous solution of lithium bromide or other salt solution as an absorption liquid (hereinafter,
(Refer to Absorption refrigerator))
（ロ）従来の技術 吸収冷凍機の稀釈運転装置の従来の技術として、例え
ば、特開昭61-70350号公報にみられるように、吸収液の
温度を感知する検出器、吸収液の飽和蒸気圧を感知する
検出器およびこれら検出器の信号を受けて吸収液の濃度
を算出する演算器が備えられ、かつ、この演算器により
算出された濃度が所定濃度に達するまで吸収液の稀釈運
転用のポンプを作動させる制御器が備えられたものがあ
る。(B) Conventional technology As the conventional technology of the dilution operation device of the absorption refrigerator, for example, as shown in JP-A-61-70350, a detector for detecting the temperature of the absorption liquid, a saturated vapor of the absorption liquid. It is equipped with a detector that senses pressure and a calculator that receives the signals from these detectors to calculate the concentration of the absorbing liquid, and for the dilution operation of the absorbing liquid until the concentration calculated by this calculator reaches a predetermined concentration. Some are equipped with a controller that operates the pump.
（ハ）発明が解決しようとする問題点 上記のような従来の技術においては、吸収冷凍機の運
転を休止させる際に外気温度の変化に伴なう吸収液の結
晶濃度の変化とは無関係に吸収液が一定濃度になるまで
稀釈運転を行うため、外気温が高くて吸収液の結晶濃度
が高い場合には吸収液用のポンプの動作時間が長すぎる
こととなってポンプ動力の無駄が大きくなる欠点を有
し、また、外気温が低くて吸収液の結晶濃度が低い場合
には吸収液の稀釈が不十分となって吸収液の結晶化を生
じるおそれもあった。(C) Problems to be Solved by the Invention In the above-described conventional techniques, the operation of the absorption refrigerator is stopped regardless of the change in the crystal concentration of the absorbing liquid accompanying the change in the outside air temperature. Since the dilution operation is performed until the absorbing liquid reaches a certain concentration, the operating time of the pump for absorbing liquid is too long when the outside air temperature is high and the crystal concentration of absorbing liquid is high, and the pump power is wasted a lot. In addition, when the ambient temperature is low and the crystal concentration of the absorbing solution is low, the absorbing solution may be insufficiently diluted to cause crystallization of the absorbing solution.
本発明は、このような従来の手段の問題点に鑑み、ポ
ンプ動力の無駄を省き、かつ、十分に吸収液を稀釈する
ことのできる吸収冷凍機の稀釈運転装置の提供を目的と
したものである。In view of such problems of the conventional means, the present invention aims to provide a dilution operation device for an absorption refrigerator, which can reduce waste of pump power and can sufficiently dilute the absorption liquid. is there.
（ニ）問題点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、吸収液の温度
を感知する検出器、吸収液の飽和蒸気圧を感知する検出
器およびこれら検出器の信号を受けて吸収液の濃度を算
出する演算器が備えられ、かつ、この演算器により算出
された濃度が設定濃度に達するまで吸収液用のポンプを
作動させる制御器が備えられている吸収冷凍機の希釈運
転装置において、その制御器には、外気温度検出器から
信号を入力し外気温度検出器の検出温度での吸収液の結
晶濃度を算出し、かつ、この算出値よりも所定値だけ低
い濃度を上記設定濃度としてセットする設定器が備えら
れている吸収冷凍機の希釈運転装置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 detector for detecting the temperature of an absorbing liquid, a detector for detecting a saturated vapor pressure of the absorbing liquid, and signals of these detectors. Absorption refrigerator having a calculator for receiving the absorption liquid and calculating the concentration of the absorption liquid, and a controller for operating a pump for the absorption liquid until the concentration calculated by the calculation device reaches a set concentration In the dilution operation device, the controller inputs a signal from the outside air temperature detector to calculate the crystal concentration of the absorbing liquid at the temperature detected by the outside air temperature detector, and is lower than this calculated value by a predetermined value. It is intended to provide a dilution operation device for an absorption refrigerator, which is provided with a setting device for setting the concentration as the set concentration.
（ホ）作用 上記本発明のよる吸収冷凍機の希釈運転装置において
は、演算器の作用として希釈運転中の吸収液の濃度をほ
ぼ正確に連続して知ることができ、かつ、設定器の作用
として外気温の変化に伴なって変わる結晶濃度に見合う
希釈の目標濃度をセットでき、吸収液用のポンプの運転
による吸収液の希釈運転の時間をほぼ必要最小限に調整
できるので、吸収液を十分に稀釈し得ると共にポンプ動
力の無駄を省き得る。(E) Action In the dilution operation device for the absorption refrigerator according to the present invention, the concentration of the absorbing liquid during the dilution operation can be continuously and almost accurately known as the action of the calculator, and the action of the setting device As a target concentration for dilution that matches the crystal concentration that changes with changes in the outside temperature can be set, and the time for diluting the absorption liquid by operating the pump for the absorption liquid can be adjusted to the minimum necessary, It can be sufficiently diluted and waste of pump power can be saved.
（ヘ）実施例 第１図は本発明による吸収冷凍機の稀釈運転装置の一
実施例を示した概略構成説明図であり、（１）は高温発
生器、（２）は低温発生器（３）および凝縮器（４）よ
り成る発生凝縮器、（５）は蒸発器（６）および吸収器
（７）より成る蒸発吸収器、（８）は低温溶液熱交換
器、（９）は高温溶液熱交換器、（10）は冷媒用のポン
プ、（11）は吸収液用のポンプで、これら機器は冷媒の
流れる管（12），（13）、冷媒液の流下する管（14）、
冷媒液の還流する管（15），（16）、吸収液の送られる
管（17），（18）、吸収液の流れる管（19），（20）、
吸収液の流下する管（21），（22）により接続されて従
来の吸収冷凍機と同様の冷媒〔水〕および吸収液〔臭化
リチウム水溶液〕の循環路を形成している。(F) Embodiment FIG. 1 is a schematic structural explanatory view showing an embodiment of a dilution operation device for an absorption refrigerator according to the present invention, where (1) is a high temperature generator and (2) is a low temperature generator (3 ) And a condenser (4), a (5) evaporative absorber comprising an evaporator (6) and an absorber (7), (8) a low temperature solution heat exchanger, and (9) a high temperature solution. A heat exchanger, (10) is a pump for refrigerant, (11) is a pump for absorbing liquid, and these devices are pipes (12) and (13) through which the refrigerant flows, and pipes (14) through which the refrigerant liquid flows,
Refrigerant liquid reflux pipes (15), (16), absorption liquid feed pipes (17), (18), absorption liquid flow pipes (19), (20),
The pipes (21) and (22) through which the absorbing liquid flows down are connected to form a circulation path for the refrigerant [water] and the absorbing liquid [lithium bromide aqueous solution] similar to the conventional absorption refrigerator.
（23）は高温発生器（１）の燃焼加熱室、（24），
（24）…は燃焼ガスの流れる管、（25）は低温発生器
（３）の加熱器、（26），（27），（28）はそれぞれ凝
縮器（４）、蒸発器（６）、吸収器（７）の熱交換器、
（29），（30），（31）は熱交換器（28），（26）と直
列に接続した冷却水あるいは温水などの流体が流れる
管、（32），（33）は熱交換器（27）と接続した冷水あ
るいは熱源水などの流体が流れる管、（34），（35）は
それぞれ凝縮器（４）、蒸発器（６）の冷媒液溜め、
（36），（37）はそれぞれ低温発生器（３）、吸収器
（７）の溶液溜め、（38）は冷媒液の散布器、（39）は
吸収液の散布器、（40）は燃焼加熱室（23）への燃料供
給路、（41）は燃料供給路（40）に備えた弁である。(23) is the combustion heating chamber of the high temperature generator (1), (24),
(24) ... are pipes through which combustion gas flows, (25) are heaters of the low temperature generator (3), (26), (27) and (28) are condensers (4), evaporators (6), Heat exchanger of the absorber (7),
(29), (30), (31) are pipes connected to the heat exchangers (28), (26) in series such as cooling water or hot water, and (32), (33) are heat exchangers ( 27) A pipe connected to a fluid such as cold water or heat source water, (34) and (35) are refrigerant reservoirs of a condenser (4) and an evaporator (6),
(36) and (37) are the low temperature generator (3) and the solution reservoir of the absorber (7) respectively, (38) is a sprayer of refrigerant liquid, (39) is a sprayer of absorbent, and (40) is combustion. A fuel supply path to the heating chamber (23) and (41) are valves provided in the fuel supply path (40).
（S1）は散布器（39）内の吸収液の温度を感知する温
度検出器、（S2）は蒸発吸収器（５）内の蒸気圧を感知
する圧力検出器、（C1）はこれら検出器（S1）、（S2）
の信号を受けて散布器（39）内の吸収液の濃度を算出す
る演算器で、この演算器には吸収液の温度、飽和蒸気
圧、濃度の関係を記憶した素子やマイクロプロセッサー
ユニットなどが内蔵されている。（C2）は演算器（C1）
により算出される濃度が稀釈の目標濃度に達するまで吸
収液用のポンプ（11）を作動させて稀釈運転を行うため
の制御器である。(S 1 ) is a temperature detector that senses the temperature of the absorbing liquid in the sprayer (39), (S 2 ) is a pressure detector that senses the vapor pressure in the evaporative absorber (5), and (C 1 ) is These detectors (S 1 ), (S 2 )
Is a computing unit that calculates the concentration of the absorbing liquid in the spreader (39) by receiving the signal of, and the computing unit includes an element or microprocessor unit that stores the relationship between the absorbing liquid temperature, saturated vapor pressure, and concentration. It is built in. (C 2 ) is a computing unit (C 1 )
This is a controller for performing the dilution operation by operating the absorption liquid pump (11) until the concentration calculated by (1) reaches the dilution target concentration.
（C3）は稀釈の目標濃度をセットする設定器で、これ
は、外気温度検出器（S3）の信号によりその検出温度
〔外気温度〕での吸収液の結晶濃度を算出し、かつ、そ
の算出値よりも所定値〔例えば0.5％〕だけ低い濃度を
稀釈の目標濃度としてセットする機能を有しており、制
御器（Ｃ）と接続されている。(C 3 ) is a setter that sets the target concentration for dilution, which calculates the crystal concentration of the absorbing liquid at the detected temperature (outside air temperature) from the signal of the outside air temperature detector (S 3 ), and It has a function of setting a concentration lower than the calculated value by a predetermined value (for example, 0.5%) as a target concentration for dilution, and is connected to the controller (C).
また、負荷側の熱交換ユニット（図示せず）の運転を
止めて冷水や冷却水などの流通を断ち、吸収冷凍機の冷
凍運転（あるいはヒートポンプ運転）を休止させる際に
は、弁（41）を閉じて高温発生器（１）の加熱を停止す
ると共に冷媒液用のポンプ（10）の作動を止める一方、
吸収液用のポンプ（11）を作動させて吸収液の稀釈運転
を開始するようになっている。そして、散布器（39）内
の吸収液の濃度が目標濃度まで稀釈されると、制御器
（C2）により吸収液用のポンプ（11）が停止されて稀釈
運転を終了するようになっている。In addition, when stopping the operation of the heat exchange unit (not shown) on the load side to cut off the flow of cold water or cooling water and suspend the freezing operation (or heat pump operation) of the absorption refrigerator, the valve (41) To stop heating of the high temperature generator (1) and stop the operation of the refrigerant liquid pump (10),
The absorption liquid pump (11) is operated to start the dilution operation of the absorption liquid. Then, when the concentration of the absorbing liquid in the sprayer (39) is diluted to the target concentration, the controller (C 2 ) stops the absorbing liquid pump (11) and terminates the dilution operation. There is.
次に、このように構成された吸収冷凍機の稀釈運転装
置（以下、本装置という）における吸収液の濃度の算出
について第２図を参照しつつ説明する。第２図は水−臭
化リチウム水溶液系のデューリング線図で、縦軸に圧
力、横軸に温度、パラメータに濃度を表わしている。Next, the calculation of the concentration of the absorption liquid in the dilution operation device (hereinafter referred to as the present device) of the absorption refrigerator configured as described above will be described with reference to FIG. FIG. 2 is a Duhring diagram of a water-lithium bromide aqueous solution system, in which the vertical axis represents pressure, the horizontal axis represents temperature, and the parameter represents concentration.
散布器（39）内の吸収液の濃度Ａは、温度検出器
（S1）の感知温度Ｔと圧力検出器（S2）の感知圧力Ｐと
から、臭化リチウム水溶液の濃度曲線に従って算出され
る。また、外気温度検出器（S3）によって温度ｔが検出
され、この温度での吸収液の結晶濃度Ｂが算出される。
そして、稀釈の目標濃度〔Ｂ−0.5〕がセットされる。
なお、濃度Ａを算出する手段として、発生凝縮器（２）
内の蒸気圧と溶液溜め（36）の吸収液の温度を感知して
演算すること（第２図の一点鎖線を参照）も可能であ
る。しかし、稀釈運転を行ったときに散布器（39）内の
吸収液の稀釈が溶液溜め（36）内のそれよりも遅くなる
ので、この手段よりも散布器（39）内の吸収液の濃度を
算出する手段の方が吸収液の結晶化を確実に防止でき
る。なおまた、第２図に示したサイクル〔ａ→ｂ→ｃ→
ｄ→ｅ→ｆ→ａ〕は稀釈運転を開始した時点における吸
収液のサイクルの一例を表わしたものである。The concentration A of the absorbing liquid in the sprayer (39) is calculated from the temperature T sensed by the temperature detector (S 1 ) and the pressure P sensed by the pressure detector (S 2 ) according to the concentration curve of the aqueous lithium bromide solution. It Further, the temperature t is detected by the outside air temperature detector (S 3 ), and the crystal concentration B of the absorbing liquid at this temperature is calculated.
Then, the target concentration for dilution [B-0.5] is set.
As a means for calculating the concentration A, the generation condenser (2)
It is also possible to sense and calculate the vapor pressure inside and the temperature of the absorbing liquid in the solution reservoir (36) (see the alternate long and short dash line in FIG. 2). However, when the dilution operation is performed, the absorption liquid in the sprayer (39) is diluted more slowly than that in the solution reservoir (36). The means for calculating can more reliably prevent crystallization of the absorbing liquid. In addition, the cycle shown in FIG. 2 [a → b → c →
d → e → f → a] represents an example of the absorbing liquid cycle at the time when the dilution operation is started.
このように、本装置においては、吸収液の稀釈の最も
下流側となる散布器（39）内の吸収液の濃度を計測しつ
つこの計測濃度が目標濃度に達するまで吸収液用のポン
プ（11）を作動させるようにしたものであるから、稀釈
運転の開始時に散布器（39）内の吸収液の濃度と稀釈の
目標濃度との差が小さい場合には稀釈運転が短時間で終
了し、従来の装置にくらべポンプ（11）の動力を節約で
きる。逆に、差が大きい場合には十分な時間をかけて稀
釈運転が行われ、従来の装置のように稀釈が不十分とな
るおそれはない。As described above, in this device, while measuring the concentration of the absorbing liquid in the sprayer (39) on the most downstream side of the dilution of the absorbing liquid, the pump (11) for absorbing liquid is used until the measured concentration reaches the target concentration. ) Is activated, the dilution operation ends in a short time if the difference between the concentration of the absorbent in the sprayer (39) and the target concentration of the dilution is small at the start of the dilution operation. The power of the pump (11) can be saved compared with the conventional device. On the contrary, when the difference is large, the dilution operation is performed for a sufficient time, and there is no possibility that the dilution is insufficient unlike the conventional device.
（ト）発明の効果 以上の通り、本発明の稀釈運転装置は、稀釈運転中の
吸収液の濃度を計測すると共に外気温度に応じて稀釈の
目標濃度を定め、この目標濃度に上記計測濃度が達する
まで稀釈運転してポンプの作動時間を調整するようにし
たものであるから、ポンプ動力の無駄を省き得ると共に
吸収液を十分に稀釈し得る。(G) Effect of the Invention As described above, the dilution operation device of the present invention measures the concentration of the absorbent during the dilution operation, determines the target concentration of the dilution according to the outside air temperature, and the measured concentration is the target concentration. Since the dilution operation is performed until the pump reaches the operating time of the pump, waste of pump power can be saved and the absorbing solution can be sufficiently diluted.
第１図は本発明による吸収冷凍機の稀釈運転装置の一実
施例を示した概略構成説明図、第２図はデューリング線
図である。 （１）……高温発生器、（２）……発生凝縮器、（３）
……低温発生器、（４）……凝縮器、（５）……蒸発吸
収器、（６）……蒸発器、（７）……吸収器、（８），
（９）……低温、高温溶液熱交換器、（11）……吸収液
用のポンプ、（36）……溶液溜め、（39）……吸収液の
散布器、（C1）……演算器、（C2）……制御器、（C3）
……設定器、（S1）……温度検出器、（S2）……圧力検
出器、（S3）……外気温度検出器。FIG. 1 is a schematic configuration explanatory view showing an embodiment of a dilution operation device for an absorption refrigerator according to the present invention, and FIG. 2 is a Duhring diagram. (1) …… High temperature generator, (2) …… Generation condenser, (3)
...... Low temperature generator, (4) ...... Condenser, (5) …… Evaporation absorber, (6) …… Evaporator, (7) …… Absorber, (8),
(9) …… Low temperature and high temperature solution heat exchanger, (11) …… Pump for absorbing liquid, (36) …… Solution reservoir, (39) …… Spraying device for absorbing liquid, (C 1 ) …… Calculation Controller, (C 2 ) ... Controller, (C 3 )
…… Setter, (S 1 ) …… Temperature detector, (S 2 ) …… Pressure detector, (S 3 ) …… Outside air temperature detector.
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 特開 昭61−70350（ＪＰ，Ａ) 特開 昭50−160863（ＪＰ，Ａ) 特開 昭59−129358（ＪＰ，Ａ) ─────────────────────────────────────────────────── ─── Continuation of the front page (56) Reference JP 61-70350 (JP, A) JP 50-160863 (JP, A) JP 59-129358 (JP, A)
Claims (1)
飽和蒸気圧を感知する検出器およびこれら検出器の信号
を受けて吸収液の濃度を算出する演算器が備えられ、か
つ、この演算器により算出された濃度が設定濃度に達す
るまで吸収液用のポンプを作動させる制御器が備えられ
ている吸収冷凍機の稀釈運転装置において、その制御器
には、外気温度検出器から信号を入力し外気温度検出器
の検出温度での吸収液の結晶濃度を算出し、かつ、この
算出値よりも所定値だけ低い濃度を上記設定濃度として
セットする設定器が備えられていることを特徴とした吸
収冷凍機の稀釈運転装置。1. A detector for detecting the temperature of the absorbing liquid, a detector for detecting the saturated vapor pressure of the absorbing liquid, and a calculator for receiving the signals from these detectors to calculate the concentration of the absorbing liquid, and In the dilution operation device of the absorption refrigerator, which is equipped with a controller that operates the pump for absorbing liquid until the concentration calculated by this calculator reaches the set concentration, the controller receives a signal from the outside air temperature detector. Is input to calculate the crystal concentration of the absorbing liquid at the temperature detected by the outside air temperature detector, and is provided with a setter that sets a concentration lower than the calculated value by a predetermined value as the set concentration. Absorption refrigerator dilution operation device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28360987A JPH0827095B2 (en) | 1987-11-10 | 1987-11-10 | Absorption refrigerator dilution operation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP28360987A JPH0827095B2 (en) | 1987-11-10 | 1987-11-10 | Absorption refrigerator dilution operation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01123960A JPH01123960A (en) | 1989-05-16 |
| JPH0827095B2 true JPH0827095B2 (en) | 1996-03-21 |
Family
ID=17667718
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP28360987A Expired - Fee Related JPH0827095B2 (en) | 1987-11-10 | 1987-11-10 | Absorption refrigerator dilution operation device |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0827095B2 (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH06323680A (en) * | 1993-05-10 | 1994-11-25 | Tokyo Gas Co Ltd | Absorptive refrigerator |
| JPH07133967A (en) * | 1993-11-09 | 1995-05-23 | Tokyo Gas Co Ltd | Air conditioner using absorption freezer |
| JP3306486B2 (en) * | 1996-02-20 | 2002-07-24 | 矢崎総業株式会社 | Dilution control method for absorption chiller / heater |
| JP3283780B2 (en) * | 1997-03-03 | 2002-05-20 | リンナイ株式会社 | Absorption cooling device |
-
1987
- 1987-11-10 JP JP28360987A patent/JPH0827095B2/en not_active Expired - Fee Related
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01123960A (en) | 1989-05-16 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |