JPH01314869A - Absorption freezer - Google Patents
Absorption freezerInfo
- Publication number
- JPH01314869A JPH01314869A JP14853688A JP14853688A JPH01314869A JP H01314869 A JPH01314869 A JP H01314869A JP 14853688 A JP14853688 A JP 14853688A JP 14853688 A JP14853688 A JP 14853688A JP H01314869 A JPH01314869 A JP H01314869A
- Authority
- JP
- Japan
- Prior art keywords
- temperature
- generator
- heat transfer
- absorption liquid
- absorption
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 238000010521 absorption reaction Methods 0.000 title claims abstract description 60
- 239000007788 liquid Substances 0.000 claims abstract description 62
- 238000010438 heat treatment Methods 0.000 claims abstract description 14
- 230000007423 decrease Effects 0.000 claims description 8
- 239000006096 absorbing agent Substances 0.000 claims description 6
- 238000005057 refrigeration Methods 0.000 claims 2
- 238000005260 corrosion Methods 0.000 abstract description 8
- 230000007797 corrosion Effects 0.000 abstract description 8
- 238000013021 overheating Methods 0.000 abstract description 4
- 230000003247 decreasing effect Effects 0.000 abstract 1
- 239000003507 refrigerant Substances 0.000 description 10
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 239000007789 gas Substances 0.000 description 4
- 230000002745 absorbent Effects 0.000 description 2
- 239000002250 absorbent Substances 0.000 description 2
- AMXOYNBUYSYVKV-UHFFFAOYSA-M lithium bromide Chemical compound [Li+].[Br-] AMXOYNBUYSYVKV-UHFFFAOYSA-M 0.000 description 2
- 239000000567 combustion gas Substances 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Abstract
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。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention relates to an absorption refrigerator, and particularly to control for preventing corrosion of structural members 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６３−１２２
３２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 for absorption refrigerators is
As seen in No. 32, there is a solution pump that sends the diluted absorption liquid in the absorber to the generator, a temperature detector that detects the temperature of the absorption liquid in the generator, and this temperature sensor detects a temperature above a predetermined temperature. Then, some devices have a controller that increases and controls 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、温度検知器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 a controlled absorption refrigerator such as the one described above, the temperature detector detects the temperature of the absorption liquid, and the temperature of the heat transfer tube in the generator is detected by the temperature detector. could not be detected. Therefore, for example, even if the upper part of the heat exchanger tube for heat exchange is exposed from the absorbent liquid due to the lowering of the liquid level of the absorption liquid during operation of the absorption refrigerator, the upper part of the heat exchanger tube becomes extremely high in temperature. However, the temperature detector that detects the temperature of the absorption liquid could not detect that the upper part of the heat transfer tube was in a nearly dry state. In conventional absorption refrigerators that are not equipped with a temperature detector to detect the temperature of the heat exchanger tubes themselves, there is a problem in that the absorption refrigerator continues to operate while the upper part of the heat exchanger tubes is excessively heated. . As a result, in conventional absorption refrigerators, corrosion progresses faster in the upper portions of the heat transfer tubes. In particular, corrosion progressed rapidly in the welded portions of the heat transfer tubes exposed to the outside of the absorption liquid.
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 problems of the prior art described above, and provides an absorption refrigerator that can reduce corrosion of heat transfer tubes 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 provides an absorption refrigerator equipped with a generator etc. that heats an absorption liquid through a heat transfer tube, in which almost all of the heat transfer tubes are heated. A temperature detector that detects the temperature of the upper part, and a controller that increases the discharge amount of the solution pump or decreases the amount of heating to the generator when the temperature detected by the detector is equal to or higher than a predetermined value. It is something that
（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 The absorption refrigerator of the present invention includes a temperature detector that detects the temperature at almost the top of the heat transfer tube, and a discharge amount of the solution pump that is adjusted when the temperature detected by the temperature detector is equal to or higher than a predetermined value. Since the configuration includes a controller that increases or decreases the amount of heating to the generator, when the temperature detected by the temperature sensor exceeds a predetermined value, the controller increases the discharge amount of the solution pump. , or perform control 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 absorption liquid flowing into the generator increases, so that the liquid 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許せる制御
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。In addition, when the controller performs control that allows the amount of heating to be reduced to the generator, the amount of heating to the generator is reduced, the pressure inside the generator is reduced, and this pressure drop causes the absorption liquid to be sent out from the generator. The force exerted on the generator is reduced, and the amount of absorption liquid delivered from the generator is reduced. Additionally, the reduced amount of heating reduces the amount of refrigerant that is separated from the absorbent liquid within the generator. As the amount of absorption liquid sent out from the generator decreases and the amount of refrigerant separated from the absorption liquid decreases, the liquid level of the absorption liquid in the generator rises.
このように発生器内の液面を上昇きせることにより、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, it is possible to prevent the heat exchanger tubes from being exposed to the gas phase of the generator and prevent them from overheating, and as a result, corrosion of the heat exchanger tubes can be reduced. I can do it.
（へ）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
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）へ送るための極液管および溶液ポンプ、（１
４）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) Example An absorption refrigerating machine which is an example of the present invention is shown in the drawings, and will be described below with reference to the drawings. (1) is a high-temperature generator that heats a dilute liquid [dilute lithium bromide solution] and separates the refrigerant [water] as vapor; (2) is a burner as a heating power source for this high-temperature generator; and (3) is a A heating amount control valve for controlling the combustion amount of this burner, (4) a low temperature generator that further heats the intermediate liquid from the high temperature generator (1) and separates 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 the refrigerant pipes for sending the unevaporated refrigerant in the evaporator (7) back to the water cooler (10). Refrigerant circulation pipe and refrigerant pump for upward dispersion, (1
1) and (12) are an polar liquid pipe and a solution pump for sending the diluted liquid in the absorber (13) to the high temperature generator (1);
4) is equipped with a high temperature heat exchanger (15) and is an intermediate liquid pipe for sending intermediate liquid from the high temperature generator (1) to the low temperature generator (4); (16) is a low temperature heat exchanger (17); ) and for sending concentrated liquid from the low temperature generator (4) to the absorber (13); (18) is a cold water pipe having the water cooler (10); (19) is a cooling pipe; This is a cooling water pipe having vessels (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″Ｃ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 sensor embedded almost at the top of the heat exchanger tube (23) in the high temperature generator (1) and detects the temperature at almost the top of the heat exchanger tube (23); (24) is the high temperature generator (1)
A temperature sensor (25) detects the temperature of the absorption liquid in the solution pump (12) when the difference in temperature detected by the temperature sensor (22) and (24) exceeds a predetermined value, for example, 40°C or more. temperature sensor (22), (24)
This is a controller that continues to increase the discharge amount until the difference between the detected temperatures 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 has been 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°Ｃ１伝熱管（２
３）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１７５℃である。Now, considering the steady operating state of an absorption chiller, the absorption chiller responds to signals from a detector that detects the load, such as a temperature detector [not shown] that detects the temperature on the outlet side of the cold water pipe (18). The discharge amount of the solution pump (12) is controlled by an inverter. 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 absorption liquid in the high temperature generator (1) in the steady state of the absorption refrigerator is approximately 155°C1.
3) When the heat exchanger tube is immersed up to the top in the absorption liquid (
The temperature of 23) is about 175°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（１２）の吐出量を１００％まで増加させる。Next, consider a case in which the liquid level of the absorption liquid in the high temperature generator (1) in an absorption refrigerator falls and the upper part of the heat exchanger tube (23) is exposed to the gas phase. The high temperature combustion gas from the burner (2) is passed through one side of the
The temperature immediately rises in the upper part of the heat transfer tube (23) exposed from the surface of the absorption liquid. When the temperature of the heat transfer tube (23) detected by the temperature sensor (22) is 40°C or more higher than the absorption liquid temperature detected by the temperature sensor (24), the controller (22) changes the discharge amount of the solution pump (12). Increase to 100%.
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１７５℃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（２
４）の検出温度との差が２０°Ｃ以内にまで低下すると
制御器（２５）は溶液ポンプ（１２）の吐出量を増加す
る制御を停止する。When the discharge rate of the solution pump (12) increases, the flow rate of the absorption liquid to the high temperature generator (1) increases. When the flow rate of the absorption liquid to the high temperature generator (1) increases, the liquid level of the absorption liquid in the high temperature generator (1) rises. When the liquid level of the absorption liquid in the high temperature generator (1) rises to the extent that the heat exchanger tube (23) is immersed in the absorption liquid up to the upper part, the temperature almost at the upper part of the heat exchanger tube (23) gradually decreases. Then, when the temperature at the upper part of the heat exchanger tube (23) detected by the temperature detector (22) drops to about 175°C,
In other words, the detected temperature of the temperature sensor (22) and the temperature detected by the temperature sensor (22)
When the difference from the detected temperature in step 4) falls to within 20°C, the controller (25) stops controlling the increase in the discharge amount of the solution pump (12).
このように、高温発生器（１）内の液面を上昇きせるこ
とによって、高温発生器（１）の気相部への伝熱管（２
３）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。In this way, by raising the liquid level in the high temperature generator (1), the heat transfer tube (2) to the gas phase part of the high temperature generator (1) is
3) can be prevented from being exposed and overheating of the heat exchanger tube (23) can be prevented, and as a result, corrosion of the heat exchanger 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’Ｃ）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 a temperature detector (23) is provided as a detector, and when this temperature detector (23) detects a temperature 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 to reduce the amount of heating to the high temperature generator (1).
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。Further, as a method of raising the liquid level of the absorption liquid in the high temperature generator (1), the flow rate of the absorption 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) Effects of the Invention In the absorption refrigerator of the present invention, when the liquid level of the absorption liquid in the generator drops, the controller performs control to raise the liquid level. By raising the liquid level in the generator in this way,
By preventing the heat exchanger tubes from being exposed to the gas phase of the generator, overheating thereof can be prevented, and as a result, corrosion of the heat exchanger tubes can be reduced.
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
、 （１１）・・・稀液管、 （１ｚ）・・・溶液ポン
プ、 （１３）−０，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。The figure is a schematic structural explanatory diagram of an absorption refrigerator of the present invention. (1)...High temperature generator, (3)...Heating amount control valve, (11)...Dilute liquid pipe, (1z)...Solution pump, (13)-0, Absorber, ( 14)...Intermediate liquid pipe, (22)...Temperature detector, (23)...Heat transfer tube, (24)...Temperature detector, (25)...Controller.
Claims (2)
、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。(1) In an absorption refrigerator in which a refrigeration cycle is configured by connecting a generator, a condenser, an evaporator, an absorber, a solution pump, etc. that heat an absorption liquid through heat transfer tubes, the uppermost portion of the heat transfer tube and a controller that increases the discharge amount of the solution pump or decreases the amount of heating to the generator when the temperature detected by the detector is equal to or higher than a predetermined value. An absorption refrigerator featuring:
、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) In an absorption refrigerator in which a refrigeration cycle is configured by connecting a generator, a condenser, an evaporator, an absorber, a solution pump, etc. that heat an absorption liquid via heat transfer tubes, the uppermost portion of the heat transfer tube a temperature sensor that detects the temperature of the absorption liquid in the generator, and a temperature sensor that detects the temperature of the absorption liquid in the generator, and when the difference between the temperatures detected by both temperature sensors is equal to or greater than a predetermined value, the solution pump discharges. An absorption refrigerating machine characterized by having a controller that increases the amount of heating or decreases the amount of heating to the generator.
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 true JPH01314869A (en) | 1989-12-20 |
| JP2639969B2 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) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5289868A (en) * | 1991-04-10 | 1994-03-01 | Hitachi, Ltd. | Absorption chiller heater and unit-type 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
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5289868A (en) * | 1991-04-10 | 1994-03-01 | Hitachi, Ltd. | Absorption chiller heater and unit-type 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2639969B2 (en) | 1997-08-13 |
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