JP2639969B2 - Absorption refrigerator - Google Patents
Absorption refrigeratorInfo
- Publication number
- JP2639969B2 JP2639969B2 JP14853688A JP14853688A JP2639969B2 JP 2639969 B2 JP2639969 B2 JP 2639969B2 JP 14853688 A JP14853688 A JP 14853688A JP 14853688 A JP14853688 A JP 14853688A JP 2639969 B2 JP2639969 B2 JP 2639969B2
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- generator
- heat transfer
- transfer tube
- 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 - Lifetime
Links
Landscapes
- Sorption Type Refrigeration Machines (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は吸収冷凍機に係り、特に発生器の構造部材の
腐食を防止する制御に関するものである。The present invention relates to an absorption refrigerator, and more particularly to a control for preventing corrosion of a structural member of a generator.
（ロ）従来の技術 吸収冷凍機の従来の技術としては、特公昭63−12232
号にみられるように、吸収器内の稀吸収液を発生器へ送
る溶液ポンプと、発生器内の吸収液の温度を検出する温
度検知器と、この温度検知器が所定温度以上を検出する
と前記溶液ポンプの吐出量を増大制御する制御器とを有
しているものがある。(B) Conventional technology The conventional technology of the absorption refrigerator is disclosed in JP-B-63-12232.
As can be seen in the figure, a solution pump that sends the rare absorbing solution in the absorber to the generator, a temperature detector that detects the temperature of the absorbing solution in the generator, and when this temperature detector detects a predetermined temperature or more Some include a controller for increasing and controlling the discharge amount of the solution pump.
（ハ）発明が解決しようとする課題 前述した吸収冷凍機のように制御を行なっているもの
においては、温度検知機は吸収液の温度を検出するもの
であり、発生器内の伝熱管の温度を検知し得ないもので
あった。このため、例えば、吸収冷凍機の運転中に吸収
液の液面が低下することによって熱交換用の伝熱管の上
部が吸収液から露出して伝熱管の上部が極めて高い温度
となっていても、吸収液の温度を検出する温度検知器で
は、前記伝熱管の上部が空焚きに近い状態になっている
ことを検知し得なかった。そして、前記伝熱管自体の温
度を検出する温度検知器を備えていない従来の吸収冷凍
機では、伝熱管の上部が過度に加熱されたまま吸収冷凍
機の運転が継続されるという問題があった。この結果、
従来の吸収冷凍機では前記伝熱管の上部での腐食の進行
を早めていた。特に、吸収液外へ露出した伝熱管の溶接
部分での腐食の進行が早まっていた。(C) Problems to be Solved by the Invention In the above-described absorption chiller that performs control, the temperature detector detects the temperature of the absorbent, and the temperature of the heat transfer tube in the generator is reduced. Could not be detected. For this reason, for example, even when the upper surface of the heat transfer tube for heat exchange is exposed from the absorbent and the upper portion of the heat transfer tube is at an extremely high temperature due to the liquid level of the absorbing solution being lowered during the operation of the absorption refrigerator. However, a temperature detector that detects the temperature of the absorbing liquid could not detect that the upper part of the heat transfer tube was almost in the state of being empty. In a conventional absorption refrigerator having no temperature detector for detecting the temperature of the heat transfer tube itself, there is a problem that the operation of the absorption refrigerator is continued while the upper portion of the heat transfer tube is excessively heated. . As a result,
In a conventional absorption refrigerator, the progress of corrosion at the upper part of the heat transfer tube has been accelerated. In particular, corrosion progressed rapidly at the welded portion of the heat transfer tube exposed to the outside of the absorbing solution.
本発明は前述した従来技術の課題にかんがみてなされ
たものであり、発生器の伝熱管の腐食を軽減できる吸収
冷凍機を提供するものである。The present invention has been made in view of the above-mentioned problems of the related art, and provides an absorption refrigerator capable of reducing corrosion of a heat transfer tube of a generator.
（ニ）課題を解決するための手段 本発明は、前述した課題を解決するために、伝熱管を
介して吸収液を加熱する発生器等を備えた吸収冷凍機に
おいて、前記伝熱管のほぼ最上部の温度を検出する温度
検知器と、この検知器の検出した温度が所定値以上の場
合に前記溶液ポンプの吐出量を増加させる、あるいは発
生器への加熱量を減少させる制御器とを設けたものであ
る。(D) Means for Solving the Problems In order to solve the above-mentioned problems, the present invention relates to an absorption refrigerator including a generator for heating an absorbent through a heat transfer tube, and the like. A temperature detector for detecting the temperature of the upper part, and a controller for increasing the discharge amount of the solution pump when the temperature detected by the detector is equal to or higher than a predetermined value or reducing the amount of heating to the generator is provided. It is a thing.
（ホ）作用 本発明の吸収冷凍機においては、伝熱管のほぼ最上部
の温度を検出する温度検知器と、この温度検知器の検出
した温度が所定値以上の場合に溶液ポンプの吐出量を増
加させる、あるいは発生器への加熱量を減少させる制御
器とを備えた構成であるので、前記温度検知器の検出し
た温度が所定値以上となると前記制御器が溶液ポンプの
吐出量を増加させる、あるいは発生器への加熱量を減少
させる制御を行なう。(E) Function In the absorption refrigerator of the present invention, a temperature detector for detecting the temperature of the almost uppermost part of the heat transfer tube, and the discharge amount of the solution pump when the temperature detected by the temperature detector is a predetermined value or more. And a controller for increasing or decreasing the amount of heating to the generator, so that when the temperature detected by the temperature detector exceeds a predetermined value, the controller increases the discharge amount of the solution pump. Or, control is performed to reduce the amount of heating to the generator.
本発明の吸収冷凍機において前記制御器が溶液ポンプ
の吐出量を増加させた場合、発生器内に流入する吸収液
の量が増加するので発生器内の吸収液の液面が上昇す
る。In the absorption refrigerator of the present invention, when the controller increases the discharge amount of the solution pump, the amount of the absorption liquid flowing into the generator increases, so that the level of the absorption liquid in the generator rises.
また、前記制御器が発生器への加熱量を減少させる制
御を行なった場合、発生器への加熱量が減り、発生器内
の圧力が低下し、この圧力低下によって発生器から吸収
液を送出する力は弱まり、発生器から吸収液を送出する
量は減少する。更に、加熱量の減少により発生器内の吸
収液から冷媒が分離される量が減る。発生器から送出さ
せる吸収液量が減少し、かつ、吸収液から冷媒の分離さ
れる量が減少することにより発生器内の吸収液の液面が
上昇する。Also, when the controller performs control to reduce the amount of heating to the generator, the amount of heating to the generator is reduced, and the pressure in the generator is reduced. The force applied is reduced and the amount of absorbent delivered from the generator is reduced. Further, the amount of refrigerant separated from the absorbing liquid in the generator is reduced due to the decrease in the amount of heating. The amount of the absorbing liquid sent from the generator decreases, and the amount of the refrigerant separated from the absorbing liquid decreases, so that the level of the absorbing liquid in the generator rises.
このように発生器内の液面を上昇させることにより、
発生器の気相部への伝熱管の露出を防いでその過熱を防
止することができ、その結果、伝熱管の腐食を軽減する
ことができる。By raising the liquid level in the generator in this way,
Exposure of the heat transfer tube to the gas phase portion of the generator can be prevented to prevent overheating thereof, and as a result, corrosion of the heat transfer tube can be reduced.
（ヘ）実施例 本発明の一実施例である吸収冷凍機を図に示し、以下
図に沿って説明する。（１）は稀液〔臭化リチウム溶液
の稀液〕を加熱し冷媒〔水〕を蒸気として分離する高温
発生器、（２）はこの高温発生器の加熱電源としてのバ
ーナー、（３）はこのバーナーの燃焼量を制御するため
の加熱量制御弁、（４）は前記高温発生器（１）からの
中間液を更に加熱し冷媒を蒸気として分離する低温発生
器、（５）は凝縮器、（６）はこの凝縮器内の冷媒液を
蒸発器（７）へ送るための冷媒管、（８），（９）は蒸
発器（７）内の未蒸発冷媒を再び冷水器（10）上への散
布するための冷媒循環用管路および冷媒ポンプ、（1
1），（12）は吸収器（13）内の稀液を高温発生器
（１）へ送るための稀液管および溶液ポンプ、（14）は
高温熱交換器（15）を備え、かつ、高温発生器（１）か
らの中間液を低温発生器（４）へ送るための中間液管、
（16）は低温熱交換器（17）を備え、かつ、低温発生器
（４）からの濃液を吸収器（13）へ送るための濃液管、
（18）は前記冷水器（10）を有する冷水管、（19）は冷
却器（20），（21）を有する冷却水管である。(F) Embodiment An absorption refrigerator according to an embodiment of the present invention is shown in the drawings, and will be described below with reference to the drawings. (1) a high-temperature generator for heating a dilute solution [dilute solution of lithium bromide solution] and separating refrigerant [water] as vapor, (2) a burner as a heating power source for the high-temperature generator, and (3) A heating amount control valve for controlling the combustion amount of the burner, (4) a low temperature generator for further heating the intermediate liquid from the high temperature generator (1) and separating the refrigerant as vapor, and (5) a condenser , (6) are refrigerant pipes for sending the refrigerant liquid in the condenser to the evaporator (7), and (8) and (9) are chillers (10) for re-evaporating the unevaporated refrigerant in the evaporator (7). A refrigerant circulation line and a refrigerant pump for spraying on
1) and (12) are equipped with a diluent tube and a solution pump for sending the dilute solution in the absorber (13) to the high-temperature generator (1), (14) is provided with a high-temperature heat exchanger (15), and An intermediate liquid pipe for sending the intermediate liquid from the high temperature generator (1) to the low temperature generator (4);
(16) has a low-temperature heat exchanger (17), and a concentrate pipe for sending the concentrate from the low-temperature generator (4) to the absorber (13);
(18) is a cold water pipe having the water cooler (10), and (19) is a cooling water pipe having coolers (20) and (21).
（22）は高温発生器（１）内の伝熱管（23）のほぼ最
上部に埋め込まれ、伝熱管（23）のほぼ最上部の温度を
検出する温度検知器、（24）は高温発生器（１）内の吸
収液温度を検出する温度検知器、（25）は温度検知器
（22），（24）の検出温度の差が所定値以上、例えば40
℃以上となると溶液ポンプ（12）の吐出量を増加させ、
温度検知器（22），（24）の検出温度の差が所定値以
内、例えば20℃以内になるまで吐出量の増加を継続させ
る制御器である。(22) is a temperature detector which is embedded in almost the uppermost part of the heat transfer tube (23) in the high temperature generator (1) and detects the temperature of the almost uppermost part of the heat transfer tube (23). (1) a temperature detector for detecting the temperature of the absorbing solution; (25) the difference between the detected temperatures of the temperature detectors (22) and (24) is a predetermined value or more, for example, 40
When the temperature exceeds ℃, the discharge rate of the solution pump (12) is increased,
This is a controller that continues increasing the discharge amount until the difference between the detected temperatures of the temperature detectors (22) and (24) falls within a predetermined value, for example, within 20 ° C.
本発明の構成は以上であり、以下動作について説明す
る。The configuration of the present invention is as described above, and the operation will be described below.
今、吸収冷凍機の定常運転状態を考えると、吸収冷凍
機では冷水管（18）出口側の温度を検出する温度検知器
〔図示せず〕等の負荷を検出する検知器からの信号に応
じて溶液ポンプ（12）の吐出量がインバーター制御され
ている。このため、100％の負荷である場合以外は溶液
ポンプ（12）の吐出量が制限された状態、つまり、溶液
ポンプ（12）の吐出量が100％未満の状態である。そし
て、吸収冷凍機の定常状態における高温発生器（１）内
の吸収液の温度は約155℃、伝熱管（23）の上部まで吸
収液中に浸されている場合の伝熱管（23）の温度は約17
5℃である。Now, considering the steady-state operation of the absorption refrigerator, the absorption refrigerator responds to a signal from a load detector such as a temperature detector (not shown) that detects the temperature at the outlet of the chilled water pipe (18). The discharge amount of the solution pump (12) is inverter-controlled. Therefore, unless the load is 100%, the discharge amount of the solution pump (12) is limited, that is, the discharge amount of the solution pump (12) is less than 100%. The temperature of the absorbent in the high-temperature generator (1) in the steady state of the absorption refrigerator is about 155 ° C., and the temperature of the heat transfer tube (23) when immersed in the absorbent up to the upper part of the heat transfer tube (23). The temperature is about 17
5 ° C.
次に、吸収冷凍機において高温発生器（１）内の吸収
液の液面が低下して伝熱管（23）の上部が気相部に露出
した場合を考える。伝熱管（23）は伝熱管の一方にバー
ナー（２）からの高温の燃焼ガスを通しているので、吸
収液の液面から露出した伝熱管（23）の上部では温度が
すぐに上昇する。温度検知器（22）の検出する伝熱管
（23）の温度が温度検知器（24）の検出する吸収液温度
より40℃以上高くなると制御器（22）が溶液ポンプ（1
2）の吐出量を100％まで増加させる。溶液ポンプ（12）
の吐出量が増加すると、高温発生器（１）への吸収液流
量は増加する。高温発生器（１）への吸収液流量が増加
すると高温発生器（１）内の吸収液の液面が上昇する。
伝熱管（23）が再上部まで吸収液に浸るほど高温発生器
（１）内の吸収液の液面が上昇すると、伝熱管（23）の
ほぼ再上部の温度は徐々に低下してくる。そして、温度
検知器（22）の検出する伝熱管（23）上部の温度が約17
5℃にまで低下すると、つまり温度検知器（22）の検出
温度と温度検知器（24）の検出温度との差が20℃以内に
まで低下すると制御器（25）の溶液ポンプ（12）の吐出
量を増加する制御を停止する。Next, let us consider a case where the liquid level of the absorbing liquid in the high-temperature generator (1) in the absorption refrigerator becomes low and the upper part of the heat transfer tube (23) is exposed to the gas phase. Since the heat transfer tube (23) passes the high-temperature combustion gas from the burner (2) to one of the heat transfer tubes, the temperature immediately rises above the heat transfer tube (23) exposed from the liquid surface of the absorbing liquid. When the temperature of the heat transfer tube (23) detected by the temperature detector (22) becomes higher than the absorption liquid temperature detected by the temperature detector (24) by 40 ° C or more, the controller (22) operates the solution pump (1
2) Increase the discharge rate to 100%. Solution pump (12)
When the discharge amount of the liquid increases, the flow rate of the absorbent to the high-temperature generator (1) increases. When the flow rate of the absorbent to the high-temperature generator (1) increases, the level of the absorbent in the high-temperature generator (1) rises.
When the liquid level of the absorbing solution in the high-temperature generator (1) rises so that the heat transfer tube (23) is immersed in the absorbing liquid to the upper portion, the temperature of the almost upper portion of the heat transferring tube (23) gradually decreases. Then, the temperature above the heat transfer tube (23) detected by the temperature detector (22) is about 17
When the temperature drops to 5 ° C, that is, when the difference between the temperature detected by the temperature detector (22) and the temperature detected by the temperature detector (24) falls to within 20 ° C, the solution pump (12) of the controller (25) The control for increasing the discharge amount is stopped.
このように、高温発生器（１）内の液面を上昇させる
ことによって、高温発生器（１）の気相部への伝熱管
（23）の露出を防いで伝熱管（23）の過熱を防止するこ
とができ、その結果、伝熱管（23）の腐食を軽減するこ
とができる。As described above, by raising the liquid level in the high-temperature generator (1), exposure of the heat transfer tube (23) to the gas phase portion of the high-temperature generator (1) is prevented, and overheating of the heat transfer tube (23) is prevented. Thus, corrosion of the heat transfer tube (23) can be reduced.
尚、検知器として温度検知器（23）だけを設け、この
温度検知器（23）が所定温度〔例えば195℃〕以上の温
度を検出すると溶液ポンプ（12）の吐出量を増加させ
る、あるいは高温発生器（１）への加熱量を減少するよ
うに制御する制御器を設けてもよい。In addition, only the temperature detector (23) is provided as a detector, and when the temperature detector (23) detects a temperature equal to or higher than a predetermined temperature (for example, 195 ° C), the discharge amount of the solution pump (12) is increased, or A controller may be provided for controlling the amount of heating to the generator (1) to be reduced.
また、高温発生器（１）内での吸収液の液面を上昇さ
せる方法として中間液管（14）の吸収液流量を減少制御
するようにしても構わない。As a method of raising the level of the absorbing liquid in the high temperature generator (1), the flow rate of the absorbing liquid in the intermediate liquid pipe (14) may be controlled to decrease.
（ト）発明の効果 本発明の吸収冷凍機では、発生器内の吸収液の液面が
低下した際に制御器がこの液面を上昇させる制御を行な
う。このように発生器内の液面を上昇させることによ
り、発生器の気相部への伝熱管の露出を防いで、その過
熱を防止することができ、その結果、伝熱管の腐食を軽
減することができる。(G) Effect of the Invention In the absorption refrigerator of the present invention, when the liquid level of the absorbing liquid in the generator decreases, the controller performs control to increase the liquid level. By raising the liquid level in the generator in this way, it is possible to prevent the heat transfer tube from being exposed to the gas phase portion of the generator and prevent overheating thereof, thereby reducing corrosion of the heat transfer tube. be able to.
図は本発明の吸収冷凍機の概略構成説明図である。 （１）……高温発生器、（３）……加熱量制御弁、（1
1）……稀液管、（12）……溶液ポンプ、（13）……吸
収器、（14）……中間液管、（22）……温度検知器、
（23）……伝熱管、（24）……温度検知器、（25）……
制御器。FIG. 1 is a schematic configuration explanatory view of an absorption refrigerator of the present invention. (1) High-temperature generator, (3) Heating control valve, (1
1) Dilution pipe, (12) Solution pump, (13) Absorber, (14) Intermediate pipe, (22) Temperature detector,
(23) ... heat transfer tube, (24) ... temperature detector, (25) ...
Controller.
Claims (2)
凝縮器、蒸発器、吸収器、溶液ポンプ等を配管接続して
冷凍サイクルを構成した吸収冷凍機において、前記伝熱
管のほぼ最上部の温度を検出する温度検知器と、この検
知器の検出した温度が所定値以上の場合に前記溶液ポン
プの吐出量を増加させる、あるいは発生器への加熱量を
減少させる制御器とを有することを特徴とする吸収冷凍
機。A generator for heating the absorbing liquid via a heat transfer tube;
A condenser, an evaporator, an absorber, a solution pump and the like are connected by piping to form a refrigerating cycle, and in the absorption refrigerator, a temperature detector for detecting a temperature of an almost uppermost portion of the heat transfer tube, and a temperature detector for detecting the temperature. A controller configured to increase the discharge amount of the solution pump when the temperature is equal to or higher than a predetermined value, or to decrease the amount of heat applied to the generator.
凝縮器、蒸発器、吸収器、溶液ポンプ等を配管接続して
冷凍サイクルを構成した吸収冷凍機において、前記伝熱
管のほぼ最上部の温度を検出する温度検知器と、前記発
生器内の吸収液の温度を検出する温度検知器と、前記両
温度検知器の検出した温度の差が所定値以上の場合に前
記溶液ポンプの吐出量を増加させる、あるいは発生器へ
の加熱量を減少させる制御器とを有することを特徴とす
る吸収冷凍機。2. A generator for heating an absorbing liquid through a heat transfer tube,
In an absorption refrigerator in which a condenser, an evaporator, an absorber, a solution pump, and the like are connected by pipes to form a refrigeration cycle, a temperature detector that detects a temperature of an almost uppermost portion of the heat transfer tube, and an absorption in the generator. A temperature detector for detecting the temperature of the liquid, and control for increasing the discharge amount of the solution pump or decreasing the amount of heating to the generator when the difference between the temperatures detected by the two temperature detectors is a predetermined value or more. An absorption refrigerator comprising:
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14853688A JP2639969B2 (en) | 1988-06-16 | 1988-06-16 | Absorption refrigerator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP14853688A JP2639969B2 (en) | 1988-06-16 | 1988-06-16 | Absorption refrigerator |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01314869A JPH01314869A (en) | 1989-12-20 |
| JP2639969B2 true JP2639969B2 (en) | 1997-08-13 |
Family
ID=15454973
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP14853688A Expired - Lifetime JP2639969B2 (en) | 1988-06-16 | 1988-06-16 | Absorption refrigerator |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2639969B2 (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2575970B2 (en) * | 1991-04-10 | 1997-01-29 | 株式会社日立製作所 | Absorption chiller / heater and individual decentralized air conditioning system |
| KR100402086B1 (en) * | 2001-04-02 | 2003-10-17 | 주식회사 센추리 | Automatic Control System and Method for preventing the Crystallization of a Solution in Absorption Refrigerator |
-
1988
- 1988-06-16 JP JP14853688A patent/JP2639969B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01314869A (en) | 1989-12-20 |
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