JPH0674932B2 - Control method of direct fire absorption chiller / heater - Google Patents

Control method of direct fire absorption chiller / heater

Info

Publication number
JPH0674932B2
JPH0674932B2 JP16889287A JP16889287A JPH0674932B2 JP H0674932 B2 JPH0674932 B2 JP H0674932B2 JP 16889287 A JP16889287 A JP 16889287A JP 16889287 A JP16889287 A JP 16889287A JP H0674932 B2 JPH0674932 B2 JP H0674932B2
Authority
JP
Japan
Prior art keywords
solution
temperature
direct
evaporator
heating
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
JP16889287A
Other languages
Japanese (ja)
Other versions
JPS6414562A (en
Inventor
修行 井上
元 八橋
正和 藤本
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Ebara Corp
Original Assignee
Ebara Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Ebara Corp filed Critical Ebara Corp
Priority to JP16889287A priority Critical patent/JPH0674932B2/en
Publication of JPS6414562A publication Critical patent/JPS6414562A/en
Publication of JPH0674932B2 publication Critical patent/JPH0674932B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

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Description

【発明の詳細な説明】 (産業上の利用分野) 本発明は、直火式吸収冷温水機における暖房サイクル時
の制御方法に関するものである。
Description: TECHNICAL FIELD The present invention relates to a control method during a heating cycle in a direct-fired absorption chiller-heater.

(従来の技術) 従来、この種の吸収冷温水機においては、通常、冷房又
は暖房負荷(一般には冷水又は温水温度)を信号として
バーナ燃焼量を調節しており、比例制御、ステップ制御
(高燃焼、低燃焼、停止)、オン・オフ制御(燃焼・停
止)などが行なわれる。燃焼量は比例で100〜30%、ス
テップで100%、40%の程度の範囲で制御される。
(Prior Art) Conventionally, in this type of absorption chiller-heater, the burner combustion amount is usually adjusted by using a cooling or heating load (generally, cold water or hot water temperature) as a signal, and proportional control, step control (high Combustion, low combustion, stop), on / off control (combustion / stop), etc. are performed. The amount of combustion is proportionally controlled in the range of 100 to 30%, and in steps of 100% and 40%.

(発明が解決しようとする問題点) この制御において、バーナにおける最低燃焼量をその最
大燃焼量の30%以下迄もって行くことは、空気比調整が
むずかしく、高価なものとなる点、火炎がバーナに近づ
いてきて、焼損するというバーナの損傷がある点などか
ら、あまり行なわれない。
(Problems to be solved by the invention) In this control, it is difficult to adjust the air ratio to bring the minimum combustion amount in the burner to 30% or less of the maximum combustion amount. It is not done so often because of the damage to the burner that is approaching to and burning.

暖房負荷が20〜40%程度の低負荷になっている場合、バ
ーナの燃焼・停止が頻繁になり、バーナ廻りの寿命に問
題ができると共に、温水温度の急変も生ずる。
When the heating load is as low as 20 to 40%, the burner often burns and stops, which may cause a problem in the life around the burner and also cause a sudden change in the hot water temperature.

冷房サイクルにおいては、燃焼停止後も、溶液の塩濃度
が高められたことに基づく(ひいては蒸発器等に液状冷
媒が蓄積されること等による)溶液の濃度エネルギが残
り、冷水温度の急変はないが、暖房サイクルにおいては
そのサイクルに濃度が関係せず、温度エネルギあるいは
濃度エネルギとして貯えられている量が少ないため、燃
焼停止後、かなり速く暖房のための出力がなくなり、温
水温度が急変し、またバーナの燃焼・停止が頻繁にな
る。
In the cooling cycle, even after the combustion is stopped, the concentration energy of the solution remains due to the increase in the salt concentration of the solution (and by the accumulation of liquid refrigerant in the evaporator, etc.), and there is no sudden change in the cold water temperature. However, in the heating cycle, the concentration is not related to the cycle, and since the amount stored as temperature energy or concentration energy is small, the output for heating disappears quite quickly after the combustion stop, and the hot water temperature changes suddenly, Also, the burner burns and stops frequently.

(問題点を解決するための手段) 本発明は、前記直火式吸収冷温水機における暖房サイク
ルにおいて、暖房負荷が低下したとき、溶液の温度を所
定温度よりも高い温度になるようにし、溶液に熱エネル
ギとして貯えられる量を多くしようとするものである。
つまり、本発明は負荷が低下した時、溶液温度を所定温
度以上に達せしめた後バーナの加熱を停止するようにし
たことにより、従来のものの上記の欠点を除き、バーナ
停止前に、溶液の温度をある程度高めておき、バーナ停
止後は、発生器から蒸発器、吸収器に導く蒸気ライン中
の蒸気弁の調節などで低負荷時の容量を調節し、バーナ
の燃焼・停止の回数を減らす事により、バーナ廻りの寿
命を延ばすと共に、温水温度の急変を減少させることが
できる、直火式吸収冷温水機の制御方法を提供すること
を目的とするものである。
(Means for Solving Problems) In the heating cycle of the direct-fired absorption chiller-heater, the present invention makes the temperature of the solution higher than a predetermined temperature when the heating load decreases, It is intended to increase the amount of heat energy that can be stored in.
That is, according to the present invention, when the load is lowered, the heating of the burner is stopped after the temperature of the solution reaches a predetermined temperature or higher, thereby eliminating the above-mentioned drawbacks of the conventional one, and before the burner is stopped, After raising the temperature to some extent, after the burner is stopped, adjust the capacity at low load by adjusting the steam valve in the steam line leading from the generator to the evaporator and absorber, and reduce the number of burner combustion / stops. Accordingly, it is an object of the present invention to provide a control method for a direct-fired absorption chiller-heater, which can extend the life around the burner and reduce the sudden change in the hot water temperature.

また、本発明は、暖房負荷が低下したとき、蒸発器への
溶液導入量を減らして溶液濃度を低下させ、吸収器と蒸
発器間の沸点上昇差を広げて、吸収器と発生器側の温度
を沸点上昇差分高くし、熱エネルギとしての蓄積エネル
ギを多くしようとすることができる。また、蒸発器下部
タンクにおける溶液濃度を低下させる場合には、さらに
分離熱(混合熱)としての蓄積された熱エネルギを多く
することができる。蒸発器における溶液スプレー量を減
少させる方法は、沸点上昇を多くするだけであるが、蒸
発器への溶液導入量を減少させる方法は、沸点上昇と、
分離熱の利点が可能となる。
Further, the present invention, when the heating load is reduced, the amount of the solution introduced into the evaporator is reduced to reduce the solution concentration, and the boiling point increase difference between the absorber and the evaporator is widened, and the absorber and the generator side It is possible to increase the temperature by increasing the boiling point difference and increase the stored energy as heat energy. Further, when the solution concentration in the lower tank of the evaporator is lowered, the accumulated heat energy as the heat of separation (heat of mixing) can be further increased. The method of reducing the amount of solution sprayed in the evaporator is only to increase the boiling point, but the method of reducing the amount of solution introduced into the evaporator is to increase the boiling point,
The benefits of heat of separation are possible.

つまり、本発明は、バーナ停止前に、蓄積された熱エネ
ルギを多くしておき、バーナ停止後は、蒸発器のスプレ
ー量調節あるいは蒸発器への溶液導入量の調節などで低
負荷時の容量を調節し、バーナの燃焼・停止の回数を減
らすことにより、バーナ廻りの寿命を延ばすと共に、温
水温度の急変を減少させることができる、直火式吸収冷
温水機の制御方法を提供することを目的とするものであ
る。
That is, in the present invention, the accumulated heat energy is increased before the burner is stopped, and after the burner is stopped, the capacity at low load is adjusted by adjusting the spray amount of the evaporator or adjusting the amount of solution introduced into the evaporator. By providing a control method for a direct-fired absorption chiller-heater, the life of the burner can be extended and sudden changes in the hot water temperature can be reduced by adjusting the number of burners and reducing the number of burner burnouts. It is intended.

すなわち、本発明は、吸収器、バーナ燃焼による直火式
発生器、凝縮器、蒸発器、冷暖切換機構、及びこれらの
機器を接続する溶液経路、冷媒経路を備えた直火式吸収
冷温水機の制御方法において、暖房負荷と温水又は溶液
温度とをそれぞれ直接又は間接的に検知し、前記暖房負
荷が設定負荷量以下になった場合、前記温水又は溶液温
度が設定値以上に達するように上昇させた後、前記バー
ナ燃焼を停止せしめ、その後前記溶液に蓄積された熱エ
ネルギーによる運転を行うことを特徴とする直火式吸収
冷温水機の制御方法である。
That is, the present invention is directed to a direct-fired absorption chiller-heater equipped with an absorber, a direct-fired generator by burner combustion, a condenser, an evaporator, a cooling / heating switching mechanism, and a solution path and a refrigerant path connecting these devices. In the control method, the heating load and the hot water or solution temperature are detected directly or indirectly, and when the heating load becomes equal to or less than a set load amount, the hot water or solution temperature rises to reach a set value or more. After that, the burner combustion is stopped, and then the operation by the thermal energy accumulated in the solution is performed, which is a control method for a direct-fired absorption chiller-heater.

また、本発明は、吸収器、バーナ燃焼による直火式発生
器、凝縮器、蒸発器、冷暖切換機構、及びこれらの機器
を接続する溶液経路、冷媒経路を備えた直火式吸収冷温
水機の制御方法において、暖房サイクル時には溶液を蒸
発器に導入すると共に、溶液をスプレーできるように
し、暖房負荷と温水又は溶液温度とを直接又は間接的に
検知し、前記暖房負荷が設定負荷量以下になった場合、
蒸発器に散布する溶液量を調節するか、または蒸発器に
導入する溶液量を調節し、前記温水又は溶液温度が設定
温度以上に達するように高めた後、前記バーナ燃焼を停
止せしめ、その後前記溶液に蓄積された熱エネルギーに
よる運転を行うことを特徴とする直火式吸収冷温水機の
制御方法である。
Further, the present invention is directed to a direct-fired absorption chiller-heater equipped with an absorber, a direct-fired generator by burner combustion, a condenser, an evaporator, a cooling / heating switching mechanism, and a solution path and a refrigerant path connecting these devices. In the control method, the solution is introduced into the evaporator during the heating cycle, and the solution can be sprayed, and the heating load and the hot water or the solution temperature are detected directly or indirectly, and the heating load becomes equal to or less than the set load amount. If
After adjusting the amount of solution to be sprayed to the evaporator or adjusting the amount of solution to be introduced into the evaporator, the hot water or the solution temperature is increased to reach the set temperature or higher, and then the burner combustion is stopped, and then the burner combustion is stopped. It is a control method for a direct-fired absorption chiller-heater, which is characterized in that operation is performed by thermal energy accumulated in a solution.

(作用) 本発明は、暖房負荷が低下した時、温水又は溶液温度を
通常設定されるバーナの停止温度よりも高く設定された
温度以上に上げるようにバーナの加熱を継続し、その設
定温度以上になったときにバーナの加熱を停止するよう
にして、熱エネルギを蓄積させておき、バーナ停止後は
蒸気弁を開く調節をするなどの便宜の手段で低負荷時の
容量を出力するように調節すると、その間バーナの加熱
を行なうことをしないですむため、バーナの燃焼・停止
の回数を減らす事ができる。この場合、例えば蒸気弁を
開くことにより、溶液温度が高いことに基づいて温度が
高い蒸気が蒸発器に供給され、温水管18に熱を供給する
ことができる。
(Operation) When the heating load is reduced, the present invention continues the heating of the burner so as to raise the temperature of the hot water or the solution to a temperature higher than the set stop temperature of the burner that is normally set, or higher than the set temperature. When the temperature becomes low, the heating of the burner is stopped, thermal energy is accumulated, and after the burner is stopped, the capacity at low load is output by a convenient means such as adjusting the opening of the steam valve. If it is adjusted, it is not necessary to heat the burner during that time, so the number of burner combustion / stops can be reduced. In this case, for example, by opening the steam valve, steam having a high temperature is supplied to the evaporator based on the high solution temperature, and heat can be supplied to the hot water pipe 18.

また、本発明はこれと併せて、暖房負荷が低下したとき
に溶液を蒸発器に導入するとともに溶液をスプレーでき
るようにし、蒸発器への溶液導入量を減らして溶液濃度
を低下させ、吸収器と蒸発器間の沸点上昇差を広げて、
吸収器と発生器側の温度を沸点上昇差分高くし、熱エネ
ルギとしての蓄積エネルギを多くすることができる。
In addition, the present invention, together with this, allows the solution to be introduced into the evaporator and spray the solution when the heating load decreases, thereby reducing the amount of the solution introduced to the evaporator to reduce the solution concentration, And increase the difference in boiling point between the evaporator and
The temperature difference between the absorber and the generator can be increased by increasing the boiling point difference, and the stored energy as heat energy can be increased.

(実施例) 本発明の実施例を図により説明すれば、第1図におい
て、Aは吸収器、GHはバーナにより加熱される直火式の
高温発生器、GLは低温発生器、Cは凝縮器、Eは蒸発
器、XHは高温溶液熱交換器、XLは低温溶液熱交換器、SP
は溶液ポンプ、RPは冷媒ポンプである。これらの機器を
接続して、管路2、3、4、5、6、7、8、散布管9
が溶液経路を形成し、管路11、12、13、14、散布管15が
冷媒経路を形成する。16は加熱管である。17はバーナの
排ガスを導く加熱管、19、20は冷却水管である。また、
18は冷房サイクル時に冷水管、暖房時には温水管とな
る。
(Embodiment) Referring to the drawings, an embodiment of the present invention will be described. In FIG. 1, A is an absorber, GH is a direct-fire high temperature generator heated by a burner, GL is a low temperature generator, and C is a condenser. Vessel, E is an evaporator, XH is a high temperature solution heat exchanger, XL is a low temperature solution heat exchanger, SP
Is a solution pump and RP is a refrigerant pump. By connecting these devices, the pipe lines 2, 3, 4, 5, 6, 7, 8 and the spray pipe 9
Forms a solution path, and the pipelines 11, 12, 13, 14 and the spray pipe 15 form a refrigerant path. 16 is a heating tube. Reference numeral 17 is a heating pipe for guiding the burner exhaust gas, and 19 and 20 are cooling water pipes. Also,
18 is a cold water pipe during the cooling cycle and a hot water pipe during heating.

26はバーナ1の燃料、例えばガス又は灯油などの流量制
御弁、27はブロア28により送られる燃焼用空気の流量制
御弁で、両弁は連動し、バーナ1の加熱量を調節するよ
うになっている。
Reference numeral 26 is a flow control valve for fuel of the burner 1, such as gas or kerosene, and 27 is a flow control valve for combustion air sent by the blower 28. Both valves work together to adjust the heating amount of the burner 1. ing.

冷房サイクル時には、29は、冷凍負荷量の検知機構とし
ての冷水出口温度検出器であり、温度制御器30を介して
流量制御弁26及び流量制御弁27を制御する。また、暖房
サイクル時には、29は、暖房負荷量の検知機構としての
温水出口温度の温度検出器であり、温度制御器30を介し
て流量制御弁26、流量制御弁27及び、蒸気弁25を制御す
る。
During the cooling cycle, 29 is a cold water outlet temperature detector as a mechanism for detecting the refrigeration load amount, and controls the flow rate control valve 26 and the flow rate control valve 27 via the temperature controller 30. Further, during the heating cycle, 29 is a temperature detector for the hot water outlet temperature as a heating load detection mechanism, and controls the flow rate control valve 26, the flow rate control valve 27, and the steam valve 25 via the temperature controller 30. To do.

冷房サイクル時、冷却水を19、20に供給すると共に、蒸
気弁25を全閉としているのに対し、暖房サイクル時には
19、20への冷却水の供給はしない。また冷媒蒸気を蒸気
弁25を通して蒸発器Eに供給する。蒸気弁25は全開から
全閉まで調節する。冷媒ポンプは通常停止する。
During the cooling cycle, cooling water is supplied to 19 and 20, and the steam valve 25 is fully closed.
Cooling water is not supplied to 19 and 20. Further, the refrigerant vapor is supplied to the evaporator E through the vapor valve 25. The steam valve 25 is adjusted from fully open to fully closed. The refrigerant pump is normally stopped.

上記の如き機器部材によりバーナ1の燃焼熱を熱源と
し、冷水管18により冷水を製造する冷凍機、又は温水管
18により温水を製造する温水機として作動するサイクル
が形成される。
A refrigerator or hot water pipe that uses the heat of combustion of the burner 1 as a heat source with the above-mentioned equipment members to produce cold water with the cold water pipe 18.
18 forms a cycle that operates as a water heater for producing hot water.

第2図は、バーナ1の燃焼量を負荷に対して比例的に制
御した場合の運転状態を示すグラフである。負荷検知と
して、温水出口又は入口の温水温度検出を行なうように
したもので、負荷が小さくなり、温水温度が上昇して来
ると、燃焼量も制御されて減少する。さらに温度が上が
ると、にて燃焼量の減少をやめて一定量の保持が行な
われる。〜間は、蒸気弁による蒸気量の調節を行な
う。即ち燃焼量が一定であっても、蒸気弁を絞ると、直
火式発生器の溶液温度が上昇して所定の設定温度に達す
ると、バーナの燃焼が停止される。その後、温水温度が
低下すると、蒸気弁を開くように制御し〜の状態に
なる。
FIG. 2 is a graph showing an operating state when the combustion amount of the burner 1 is proportionally controlled with respect to the load. As the load detection, the hot water temperature at the hot water outlet or inlet is detected. When the load becomes smaller and the hot water temperature rises, the combustion amount is also controlled and decreases. When the temperature further rises, the reduction of the combustion amount is stopped and the constant amount is maintained. Between ~, the amount of steam is adjusted by the steam valve. That is, even if the amount of combustion is constant, when the steam valve is throttled, the temperature of the solution in the direct-fired generator rises and reaches a predetermined set temperature, the combustion of the burner is stopped. After that, when the temperature of the hot water decreases, the steam valve is controlled to open and the state of ~ is reached.

設定溶液温度は、高温発生器の温度を使用してもよい
し、熱交換器などの所の温度を利用してもよく高温発生
器GHの圧力が所定の圧力(LiBr−H2Oを吸収剤−冷媒と
する系では通常700mmHgA程度)となる温度にするのが好
ましい。温度の代わりに直接圧力を用いてもさしつかえ
ない。
As for the set solution temperature, the temperature of the high temperature generator may be used, or the temperature of a place such as a heat exchanger may be used, and the pressure of the high temperature generator GH absorbs a predetermined pressure (LiBr-H 2 O It is preferable to set the temperature to about 700 mmHgA in the system of agent-refrigerant. Direct pressure may be used instead of temperature.

また、蒸気弁による調節開始点は、点と一致させる必
要はなく、図中であってもさしつかえない。また、
〜間にとることもできる。ととの間ではバーナ1
による加熱なしに温度エネルギによる運転が行われる。
Further, the adjustment start point by the steam valve does not have to coincide with the point, and it does not matter even in the figure. Also,
It can be set between. Burner 1 between and
Operation with temperature energy is performed without heating by.

負荷が増大し、温水温度がの状態に下がるとバーナ1
による燃焼が再開されの状態となり、なお負荷が増大
すれば通常の運転が続けられる。
When the load increases and the hot water temperature drops to, the burner 1
Combustion due to is restarted, and if the load still increases, normal operation continues.

第3図は燃焼量を段階的制御した場合の運転状態を示
す。
FIG. 3 shows the operating state when the combustion amount is controlled stepwise.

また、第4図は、前記の直火式吸収冷温水機の制御方法
において、直火式吸収冷温水機を暖房サイクル時には溶
液を蒸発器に導入すると共に溶液をスプレーできるよう
にし、かつ蒸発器に散布する溶液量を調節し、また蒸発
器に導入する溶液量を調節するように制御する方法にお
ける実施例を示したものである。
In addition, FIG. 4 shows the method for controlling a direct-fired absorption chiller-heater in which the solution is introduced into the evaporator and the solution can be sprayed during the heating cycle in the direct-fired absorption chiller-heater. 2 shows an example of a method for controlling so as to adjust the amount of solution to be sprayed on and to control the amount of solution to be introduced into the evaporator.

第4図の構成の主要部分は第1図の構成と同じであり、
相違する個所のみを説明すると、管路22は溶液を蒸発器
へ導入するために管路2から溶液を管路13へ導くための
ものであり、途中に制御弁23が設けられ、また管路13に
も制御弁31が設けられている。そして、制御弁23及び31
はそれぞれ温度制御器30に接続されている。
The main part of the configuration of FIG. 4 is the same as the configuration of FIG.
Explaining only the different points, the pipe line 22 is for guiding the solution from the pipe line 2 to the pipe line 13 for introducing the solution into the evaporator, a control valve 23 is provided in the middle, and the pipe line is also provided. A control valve 31 is also provided at 13. And control valves 23 and 31
Are respectively connected to the temperature controller 30.

第4図の構成の直火式吸収冷温水器においては、暖房サ
イクル時には、29は、暖房負荷量の検知機構としての温
水出口温度の温度検出器である。温度制御器30を介して
流量制御弁26、流量制御弁27及び蒸発器スプレー量の制
御弁31(又は1及び蒸発器への溶液導入量の制御弁23)
を制御する。
In the direct-fired absorption chiller-heater configured as shown in FIG. 4, 29 is a temperature detector of the hot water outlet temperature as a heating load detection mechanism during the heating cycle. Flow rate control valve 26, flow rate control valve 27, and evaporator spray amount control valve 31 (or 1 and solution introduction amount control valve 23) via the temperature controller 30.
To control.

冷房サイクル時、冷却水を冷却水管19、20に供給すると
共に、制御弁23、25を全閉としているのに対し、暖房サ
イクル時には冷却水管19、20には冷却水を供給せず、制
御弁23、25の開度調節をしている。蒸発器スプレー量を
調節する方式では制御弁31を入れて制御する。蒸発器へ
の溶液導入量を調節する方式では制御弁23を流量制御弁
として利用する。
While the cooling water is supplied to the cooling water pipes 19 and 20 during the cooling cycle and the control valves 23 and 25 are fully closed, the cooling water is not supplied to the cooling water pipes 19 and 20 during the heating cycle and the control valve is The opening of 23 and 25 is adjusted. In the method of adjusting the spray amount of the evaporator, the control valve 31 is inserted for control. In the method of adjusting the amount of solution introduced into the evaporator, the control valve 23 is used as a flow rate control valve.

第4図の構成の直火式吸収冷温水機について運転状態を
示すグラフも第2図と同様になるが、〜間は、制御
弁31による蒸発器スプレー量の制御又は1及び制御弁23
による蒸発器への溶液導入量制御を行なう。
The graph showing the operating state of the direct-fired absorption chiller-heater configured as shown in FIG. 4 is also the same as that shown in FIG.
The amount of solution introduced into the evaporator is controlled by.

またこの方式において蒸発器の溶液スプレー量を減少さ
せると、同一の濃度の溶液を多量にスプレーしたときよ
りも、冷媒吸収量が減少し、温水への熱量は減少する。
この場合、伝熱管上の吸収溶液濃度はスプレー量が少な
いときの方が低下する。
Further, when the amount of solution sprayed in the evaporator is reduced in this system, the amount of refrigerant absorbed and the amount of heat to the hot water are reduced as compared with the case where a large amount of a solution having the same concentration is sprayed.
In this case, the concentration of the absorbing solution on the heat transfer tube is lower when the spray amount is small.

一方、蒸発器への溶液導入量を減少させると、蒸発器内
の溶液の濃度が低下していき、吸収量が減少し、温水へ
の熱量が減少する。
On the other hand, when the amount of solution introduced into the evaporator is reduced, the concentration of the solution in the evaporator is reduced, the amount of absorption is reduced, and the amount of heat to hot water is reduced.

さらに、蒸発器の溶液が温度一定のまま前記により濃度
が低下すると、蒸発器と同一圧力の吸収器の溶液の温度
は、蒸発器よりも濃度差に関係する沸点上昇分だけ上昇
する。また、直火式発生器の温度も濃度差に関係して沸
点上昇がある。溶液温度は直火式発生器部あるいは吸収
器部などで検出し、バーナーの燃焼停止を行なう。
Further, if the concentration of the solution in the evaporator is reduced due to the above while keeping the temperature constant, the temperature of the solution in the absorber having the same pressure as that of the evaporator is increased by an amount corresponding to the boiling point increase related to the difference in concentration, as compared with the evaporator. Further, the temperature of the direct-fired generator also rises in boiling point in relation to the concentration difference. The solution temperature is detected by the direct-fire generator or absorber, and the burner combustion is stopped.

上記の蒸発器への溶液の導入にさいしては、濃度の異な
る溶液を混合することにより混合熱が発生する。蒸発器
と吸収器とで溶液の濃度差をつけておくことは、この混
合熱を貯えていることになる。
When introducing the solution into the evaporator, heat of mixing is generated by mixing solutions having different concentrations. Keeping a difference in solution concentration between the evaporator and the absorber means that this heat of mixing is stored.

また、上記弁を制御することにより、直火式発生器の温
度を、濃度制御だけのときよりも上昇させ、蓄積熱エネ
ルギをさらに多くすることもできる。
Further, by controlling the valve, the temperature of the direct-fired generator can be increased more than that in the case of only the concentration control, and the accumulated heat energy can be further increased.

(発明の効果) 本発明は、バーナ燃焼を停止させた後蓄積熱エネルギに
よる運転を行なうことにより、バーナ停止前に吸収溶液
の蓄積熱エネルギを高めておき、軽負荷時は溶液の蓄積
熱エネルギを用いながら暖房サイクルを作動して、バー
ナの発停回数を減少せしめて、温水温度の急変を減少さ
せると共に、バーナの寿命を長くすることができる。
(Effect of the Invention) The present invention increases the accumulated heat energy of the absorbing solution before stopping the burner by performing the operation with the accumulated heat energy after stopping the burner combustion, and the accumulated heat energy of the solution at the time of light load. While operating the heating cycle, the number of start and stop of the burner can be reduced, the sudden change of the hot water temperature can be reduced, and the life of the burner can be extended.

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

第1図は本発明のフロー図、第2図及び第3図は制御状
態を示すものであり、第4図は本発明の暖房サイクル時
には溶液を蒸発器に導入すると共に、溶液をスプレーで
きるようにした方法におけるフロー図を示す。 A……吸収器、GH……高温発生器 GL……低温発生器、C……凝縮器、E……蒸発器 XH……高温溶液熱交換器 XL……低温溶液熱交換器、SP……溶液ポンプ RP……冷媒ポンプ、1……バーナ、9……散布管 15……散布管、16……加熱管、17……加熱管 18……冷水(温水)管、19……冷却水管 20……冷却水管 22……溶液を導入するための管路 23……制御弁 24……暖房時に上記を通すための管路 25……蒸気弁、26……流量制御弁 27……流量制御弁、28……ブロア 29……温度検出器、30……温度制御器
FIG. 1 is a flow chart of the present invention, FIGS. 2 and 3 show control states, and FIG. 4 shows that the solution can be introduced into the evaporator and sprayed during the heating cycle of the present invention. The flow chart in the method which was set is shown. A ... Absorber, GH ... High temperature generator GL ... Low temperature generator, C ... Condenser, E ... Evaporator XH ... High temperature solution heat exchanger XL ... Low temperature solution heat exchanger, SP ... Solution pump RP …… Refrigerant pump, 1 …… Burner, 9 …… Spray pipe 15 …… Spray pipe, 16 …… Heating pipe, 17 …… Heating pipe 18 …… Cold water (hot water) pipe, 19 …… Cooling water pipe 20 …… Cooling water pipe 22 …… Pipeline for introducing solution 23 …… Control valve 24 …… Pipeline for passing the above during heating 25 …… Steam valve, 26 …… Flow control valve 27 …… Flow control valve , 28 ...... Blower 29 ...... Temperature detector, 30 ...... Temperature controller

Claims (4)

【特許請求の範囲】[Claims] 【請求項1】吸収器、バーナ燃焼による直火式発生器、
凝縮器、蒸発器、冷暖切換機構、及びこれらの機器を接
続する溶液経路、冷媒経路を備えた直火式吸収冷温水機
の制御方法において、暖房負荷と温水又は溶液温度とを
それぞれ直接又は間接的に検知し、前記暖房負荷が設定
負荷量以下になった場合、前記温水又は溶液温度が設定
値以上に達するように上昇させた後、前記バーナ燃焼を
停止せしめ、その後前記溶液に蓄積された熱エネルギー
による運転を行うことを特徴とする直火式吸収冷温水機
の制御方法。
1. An absorber, a direct fire type generator by burner combustion,
In a control method of a direct-fired absorption chiller-heater equipped with a condenser, an evaporator, a cooling / heating switching mechanism, and a solution path and a refrigerant path connecting these devices, a heating load and hot water or solution temperature are directly or indirectly When the heating load becomes equal to or lower than the set load amount, the temperature of the hot water or the solution is increased to reach the set value or more, then the burner combustion is stopped, and then the solution is accumulated in the solution. A method for controlling a direct-fired absorption chiller-heater characterized by operating with thermal energy.
【請求項2】冷暖切換機構の少なくとも一つが、直火式
発生器またはこれに継がる機器、配管の高圧冷媒蒸気側
と、蒸発器の低圧側とを結ぶ配管に設けた蒸気弁であ
り、低負荷時に、該蒸気弁を絞ることにより、溶液温度
を高めることを特徴とする特許請求の範囲第(1)項記
載の直火式吸収冷温水機の制御方法。
2. At least one of the cooling / heating switching mechanism is a direct-fired generator or a device connected thereto, and a steam valve provided in a pipe connecting a high-pressure refrigerant vapor side of the pipe and a low-pressure side of the evaporator, The method for controlling a direct-fire absorption chiller-heater according to claim (1), characterized in that the solution temperature is raised by throttling the steam valve when the load is low.
【請求項3】吸収器、バーナ燃焼による直火式発生器、
凝縮器、蒸発器、冷暖切換機構、及びこれらの機器を接
続する溶液経路、冷媒経路を備えた直火式吸収冷温水機
の制御方法において、暖房サイクル時には溶液を蒸発器
に導入すると共に、溶液をスプレーできるようにし、暖
房負荷と温水又は溶液温度とを直接又は間接的に検知
し、前記暖房負荷が設定負荷量以下になった場合、蒸発
器に散布する溶液量を調節するか、または蒸発器に導入
する溶液量を調節し、前記温水又は溶液温度が設定温度
以上に達するように高めた後、前記バーナ燃焼を停止せ
しめ、その後前記溶液に蓄積された熱エネルギーによる
運転を行うことを特徴とする直火式吸収冷温水機の制御
方法。
3. An absorber, a direct fire type generator by burner combustion,
Condenser, evaporator, cooling / heating switching mechanism, and solution path connecting these devices, a method of controlling a direct-fired absorption chiller-heater equipped with a refrigerant path, the solution is introduced into the evaporator during the heating cycle, and the solution It is possible to spray, and directly or indirectly detect the heating load and the temperature of hot water or solution, and when the heating load is below the set load amount, adjust the amount of solution sprayed to the evaporator or evaporate. The amount of the solution introduced into the vessel is adjusted, the hot water or the solution temperature is raised to reach the set temperature or higher, the burner combustion is stopped, and then the operation by the thermal energy accumulated in the solution is performed. A method for controlling an open-air absorption chiller-heater.
【請求項4】冷暖切換機構の少なくとも一つが、直火式
発生器またはこれに継がる機器、配管の高圧冷媒蒸気側
と、蒸発器の低圧側とを結ぶ配管に設けた蒸気弁であ
り、低負荷時に、該蒸気弁を絞ることにより、溶液温度
を高めることを特徴とする特許請求の範囲第(3)項記
載の直火式吸収冷温水機の制御方法。
4. At least one of the cooling / heating switching mechanism is a direct-fired generator or a device connected to it, and a steam valve provided in a pipe connecting a high-pressure refrigerant vapor side of the pipe and a low-pressure side of the evaporator, The method for controlling a direct-fired absorption chiller-heater according to claim (3), wherein the solution temperature is raised by throttling the steam valve when the load is low.
JP16889287A 1987-07-08 1987-07-08 Control method of direct fire absorption chiller / heater Expired - Lifetime JPH0674932B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP16889287A JPH0674932B2 (en) 1987-07-08 1987-07-08 Control method of direct fire absorption chiller / heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP16889287A JPH0674932B2 (en) 1987-07-08 1987-07-08 Control method of direct fire absorption chiller / heater

Publications (2)

Publication Number Publication Date
JPS6414562A JPS6414562A (en) 1989-01-18
JPH0674932B2 true JPH0674932B2 (en) 1994-09-21

Family

ID=15876503

Family Applications (1)

Application Number Title Priority Date Filing Date
JP16889287A Expired - Lifetime JPH0674932B2 (en) 1987-07-08 1987-07-08 Control method of direct fire absorption chiller / heater

Country Status (1)

Country Link
JP (1) JPH0674932B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2747348B2 (en) * 1989-12-21 1998-05-06 株式会社日立製作所 Absorption chiller / heater controller
JP3241550B2 (en) * 1994-10-18 2001-12-25 株式会社荏原製作所 Double effect absorption chiller / heater

Also Published As

Publication number Publication date
JPS6414562A (en) 1989-01-18

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