JPH04203860A - Absorption type water cooling and/or heating device and operating method thereof - Google Patents
Absorption type water cooling and/or heating device and operating method thereofInfo
- Publication number
- JPH04203860A JPH04203860A JP33023690A JP33023690A JPH04203860A JP H04203860 A JPH04203860 A JP H04203860A JP 33023690 A JP33023690 A JP 33023690A JP 33023690 A JP33023690 A JP 33023690A JP H04203860 A JPH04203860 A JP H04203860A
- Authority
- JP
- Japan
- Prior art keywords
- heat source
- refrigerant
- refrigerant vapor
- solution
- evaporator
- 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.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 53
- 238000010438 heat treatment Methods 0.000 title claims abstract description 27
- 238000010521 absorption reaction Methods 0.000 title claims description 26
- 238000001816 cooling Methods 0.000 title description 15
- 238000011017 operating method Methods 0.000 title description 2
- 239000003507 refrigerant Substances 0.000 claims abstract description 66
- 239000006096 absorbing agent Substances 0.000 claims abstract description 22
- 239000012530 fluid Substances 0.000 claims abstract description 13
- 238000000034 method Methods 0.000 claims abstract description 8
- 239000000498 cooling water Substances 0.000 claims description 14
- 238000004378 air conditioning Methods 0.000 abstract description 5
- 238000004519 manufacturing process Methods 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 239000007788 liquid Substances 0.000 description 7
- 230000000694 effects Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005057 refrigeration Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000007423 decrease Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000000284 extract Substances 0.000 description 1
- 238000007710 freezing Methods 0.000 description 1
- 230000008014 freezing Effects 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、吸収冷温水装置に係り、特に排熱などを熱源
として運転する吸収冷温水装置とその運転方法に関する
。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to an absorption chiller/hot water apparatus, and more particularly to an absorption chiller/heater which operates using exhaust heat or the like as a heat source, and an operating method thereof.
通常、吸収冷凍機では、冷房運転時は、吸収器、凝縮器
に冷却水を通水し、発生器に熱源となる温水（エンジン
の排出熱など）を通し、蒸発器から、冷房用の冷水を取
り昌す。冷房サイクルは通常の吸収冷凍サイクルで運転
される。Normally, in an absorption chiller, during cooling operation, cooling water is passed through the absorber and condenser, hot water that becomes a heat source (e.g. engine exhaust heat) is passed through the generator, and then cold water for cooling is passed from the evaporator to the generator. I will take over. The cooling cycle is operated as a normal absorption refrigeration cycle.
一方、暖房の場合は、熱源となる温水と、暖房用温水と
を直接、熱交換させてもよいのであるが、空調用流体（
冷水、温水）の経路が、冷房と暖房とで異なり、切替弁
が必要になる。すなわち、冷水は蒸発器から、温水は熱
源温水と暖房温水との熱交換器から得ることになる。On the other hand, in the case of heating, it is possible to directly exchange heat between the hot water that serves as the heat source and the hot water for heating, but the air conditioning fluid (
The routes for cold water and hot water are different for cooling and heating, and a switching valve is required. That is, cold water is obtained from the evaporator, and hot water is obtained from the heat exchanger between the heat source hot water and the heating hot water.
ところで、通常、空調器は一つのコイルを持ち冷房時に
冷水を、暖房時に温水を通す。従って、冷温水機側では
同一の機器（ここでは蒸発器）から冷水、温水を取り出
すのが好ましい。By the way, an air conditioner usually has one coil that passes cold water during cooling and hot water during heating. Therefore, it is preferable to take out cold water and hot water from the same device (here, the evaporator) on the water cooler/heater side.
そこで、本発明は、同一の機器すなわち蒸発器から、冷
水と温水を取り出すことのできる吸収冷温水装置とその
運転方法を提供することを目的とする。SUMMARY OF THE INVENTION Therefore, an object of the present invention is to provide an absorption cold/hot water device that can take out cold water and hot water from the same device, that is, an evaporator, and a method of operating the same.
上記目的を達成するために、本発明では、発生器、凝縮
器、吸収器、蒸発器、溶液熱交換器を主要構成機器とし
、これらを溶液配管、冷媒配管で結んでサイクルを構成
する吸収冷温水装置において、発生器又は凝縮器の冷媒
蒸気を、吸収器又は蒸発器に導く冷媒蒸気配管を設け、
該冷媒蒸気配管には冷媒蒸気流量調節弁を設けたことを
特徴とする吸収冷温水装置としたものであり、また、上
記の吸収冷温水装置において、発生器への熱源供給通路
に熱源冷却器、該熱源冷却器への冷却水流量調節装置及
び熱源過剰度検出器を設けたことを特徴とする吸収冷温
水装置としたものである。In order to achieve the above object, the present invention uses a generator, a condenser, an absorber, an evaporator, and a solution heat exchanger as main components, and connects these with solution piping and refrigerant piping to form a cycle. In the water device, refrigerant vapor piping is provided to guide refrigerant vapor from the generator or condenser to the absorber or evaporator,
The absorption chilled/hot water apparatus is characterized in that the refrigerant vapor piping is provided with a refrigerant vapor flow rate control valve, and the above absorption chilled/hot water apparatus also includes a heat source cooler in the heat source supply passage to the generator. This is an absorption chilled/hot water device characterized by being provided with a cooling water flow rate adjustment device for the heat source cooler and a heat source excess degree detector.
また、上記の他の目的を達成するために、本発明では、
上記の吸収冷温水装置の暖房運転において、蒸発器を通
る外部流体の負荷又は温度を検出して、これに応じて冷
媒蒸気流量調節弁を制御することにより、冷媒蒸気流量
を制御して暖房能力を制御することを特徴とする吸収冷
温水装置の運転方法としたものであり、さらに、発生器
の熱源供給通路に熱源冷却器を設けた場合の運転におい
て、熱源過剰度検出器で熱源の過剰度を熱源温度又は熱
源蒸気圧で検出し、該熱源の過剰度に応じて熱源冷却器
への冷却水流量を調節することを特徴とする吸収冷温水
装置の運転方法としたものである。In addition, in order to achieve the above-mentioned other objects, in the present invention,
In the heating operation of the above-mentioned absorption chiller/heater, the load or temperature of the external fluid passing through the evaporator is detected and the refrigerant vapor flow rate control valve is controlled accordingly, thereby controlling the refrigerant vapor flow rate and increasing the heating capacity. This is a method of operating an absorption chiller/heating device characterized by controlling The present invention is a method for operating an absorption chiller/hot water device, which is characterized in that the temperature is detected by the heat source temperature or the heat source vapor pressure, and the flow rate of cooling water to the heat source cooler is adjusted according to the excess degree of the heat source.
すなわち、本発明は、同一の機器（蒸発器）から、冷水
と温水を取り出すため、高圧側（発生器または凝縮器）
と低圧側（吸収器または蒸発器）とを、弁を有する配管
で結んでいる。That is, the present invention extracts cold water and hot water from the same equipment (evaporator), so the high pressure side (generator or condenser)
and the low pressure side (absorber or evaporator) are connected by piping with valves.
暖房運転時は、吸収器、凝縮器への冷却水は通水せず、
発生器に温水（エンジンの排出熱など）を通し、蒸発器
から、暖房用の温水を取り出す。暖房サイクルは、ただ
単に、熱源の熱を溶液、冷媒を経由して、蒸発器の温水
に伝えているだけである。During heating operation, cooling water does not flow to the absorber and condenser.
Hot water (engine exhaust heat, etc.) is passed through the generator, and hot water for heating is extracted from the evaporator. The heating cycle simply transfers heat from a heat source to hot water in an evaporator via a solution and a refrigerant.
本発明の特徴は、暖房時の制御にある。 A feature of the present invention is control during heating.
すなわち、暖房用温水の温度（または、暖房負荷）を検
出し、高圧側から低圧側に流れる冷媒蒸気量を調整して
いる。すなわち、温水温度が高ければ（負荷が少なけれ
ば）、冷媒蒸気弁開度を絞り、温水温度が低ければ（負
荷が多ければ）、冷媒蒸気弁開度を開くようにする。That is, the temperature of hot water for heating (or heating load) is detected, and the amount of refrigerant vapor flowing from the high pressure side to the low pressure side is adjusted. That is, if the hot water temperature is high (if the load is small), the refrigerant vapor valve opening is reduced, and if the hot water temperature is low (if the load is large), the refrigerant vapor valve is opened.
また、エンジンの排出熱などを熱源とするばあいは、吸
収冷凍装置の役目として冷温水を製造する以外に、熱源
を冷却する役目もある。そこで、暖房時の温度制御をし
て、前記冷媒蒸気弁を絞ると、熱源が冷却できなくなる
ことがある。このため、バックアップとして、冷却器を
設け、冷却水で熱源を冷却してもよい。すなわち、熱源
の過剰度を検出し、熱源過剰度に応じて、熱源冷却器へ
の冷却水流量を調節することによって、熱源の冷却を制
御してもよい。熱源過剰度としては、たとえば、熱源が
温水であれば、熱源温度が適当で、熱源が蒸気の形であ
れば、熱源温度または熱源蒸気圧が適当である。In addition, when exhaust heat from an engine is used as a heat source, the absorption refrigeration system has the role of cooling the heat source in addition to producing cold/hot water. Therefore, if the temperature is controlled during heating and the refrigerant vapor valve is throttled, the heat source may not be able to be cooled down. Therefore, as a backup, a cooler may be provided to cool the heat source with cooling water. That is, cooling of the heat source may be controlled by detecting the degree of excess of the heat source and adjusting the flow rate of cooling water to the heat source cooler according to the degree of excess of the heat source. As the heat source excess degree, for example, if the heat source is hot water, the heat source temperature is appropriate, and if the heat source is in the form of steam, the heat source temperature or heat source vapor pressure is appropriate.
その他、熱量算出法などでもよい。Other methods such as a calorific value calculation method may also be used.
冷房時の制御としては、冷水温度（空調用流体温度）を
検出し、温度が低すぎる場合、冷媒蒸気弁を調節して、
高圧側から低圧側に冷媒を流して、冷温水機の冷凍能力
を小さくする方法などがある。For cooling control, the chilled water temperature (air conditioning fluid temperature) is detected, and if the temperature is too low, the refrigerant vapor valve is adjusted.
There is a method to reduce the refrigerating capacity of the water cooler/heater by flowing refrigerant from the high pressure side to the low pressure side.
また冷媒蒸気弁の代わりに、冷媒液弁を通して、冷媒液
を溶液に混入しても能力調整ができる。Also, the capacity can be adjusted by mixing refrigerant liquid into the solution through a refrigerant liquid valve instead of a refrigerant vapor valve.
以下、本発明を実施例により具体的に説明するが、本発
明はこれに限定されるものではない。EXAMPLES Hereinafter, the present invention will be specifically explained with reference to Examples, but the present invention is not limited thereto.
実施例１
第１図に本発明の吸収冷温水装置のフロー構成図を示す
。第１図において、Ｇは発生器、Ａは吸収器、Ｅは蒸発
器、Ｃは凝縮器、Ｈは溶液熱交換器、９は冷媒蒸気弁、
１５は熱源冷却器、１６は熱源温度検出器、１９は外部
流体温度検出器、１１．１２はポンプを示し、管１〜４
は溶液通路、管５〜８は冷媒通路、２１〜２５は冷却水
通路を示している。Embodiment 1 FIG. 1 shows a flow diagram of the absorption chiller/heater apparatus of the present invention. In FIG. 1, G is a generator, A is an absorber, E is an evaporator, C is a condenser, H is a solution heat exchanger, 9 is a refrigerant vapor valve,
15 is a heat source cooler, 16 is a heat source temperature detector, 19 is an external fluid temperature detector, 11.12 is a pump, and tubes 1 to 4
denotes a solution passage, tubes 5 to 8 are refrigerant passages, and 21 to 25 are cooling water passages.
そして、冷房運転では、冷媒を吸収した希溶液は吸収器
Ａから管１を通り、ポンプ１１により熱交換器の被加熱
側に送られ、熱交換により加温された希溶液は管２を通
り発生器Ｇに導入される。発生器Ｇでは、管１４からの
エンジンのジャケット温水等の熱源により加熱されて、
吸収した冷媒蒸気を蒸発して濃縮される。濃縮された濃
溶液は管３から熱交換器Ｈの加熱を通って、管４から吸
収器Ａに導入され再び冷媒を吸収して希溶液となって管
１から循環される。During cooling operation, the dilute solution that has absorbed the refrigerant passes through pipe 1 from absorber A and is sent to the heated side of the heat exchanger by pump 11, and the dilute solution heated by heat exchange passes through pipe 2. is introduced into generator G. In the generator G, it is heated by a heat source such as engine jacket hot water from the pipe 14,
The absorbed refrigerant vapor is evaporated and concentrated. The concentrated solution passes through the heat exchanger H through the tube 3, is introduced into the absorber A through the tube 4, absorbs the refrigerant again, becomes a dilute solution, and is circulated through the tube 1.
一方、発生器Ｇで発生した冷媒蒸気はｉ！ｉｌ縮器Ｃに
至り、凝縮器Ｃ中の冷却水によって冷却されて凝縮し、
管５から蒸発器Ｅに導入される。On the other hand, the refrigerant vapor generated in generator G is i! il condenser C, where it is cooled and condensed by the cooling water in condenser C,
It is introduced into the evaporator E through the pipe 5.
蒸発器Ｅでは、冷媒は冷水から熱を奪い、冷凍効果を発
揮して蒸発する。蒸発した冷媒蒸気は吸収器Ａで溶液に
吸収される。吸収の際の吸収熱は吸収器を流れる管２４
からの冷却水により冷却される。In the evaporator E, the refrigerant removes heat from the cold water, exhibits a freezing effect, and evaporates. The evaporated refrigerant vapor is absorbed into a solution in absorber A. During absorption, the absorbed heat flows through the absorber through the pipe 24.
It is cooled by cooling water from
上記のように冷房運転では、吸収冷凍機の通常の冷房サ
イクルの運転である。As mentioned above, the cooling operation is a normal cooling cycle operation of an absorption refrigerator.
一方暖房運転では、吸収器Ａからの溶液を管１から溶液
熱交換器Ｈの被加熱側に導入し、加熱側の濃溶液と熱交
換して温度を高給、溶液熱交換器Ｈを出た後、管２から
発生器Ｇに導入される。ここで溶液は、外部熱源１４に
より加熱され濃縮される。濃縮された濃溶液は、発生器
Ｇから管３により溶液熱交換器Ｈの加熱側に入り、被加
熱側の希溶液を加熱して管４から吸収器Ａに入る。On the other hand, in heating operation, the solution from absorber A is introduced through tube 1 to the heated side of solution heat exchanger H, exchanges heat with the concentrated solution on the heating side to raise the temperature, and exits solution heat exchanger H. After that, it is introduced into the generator G through the tube 2. Here, the solution is heated and concentrated by an external heat source 14. The concentrated solution enters the heating side of the solution heat exchanger H from the generator G through a pipe 3, heats the dilute solution on the side to be heated, and enters the absorber A through a pipe 4.
発生器Ｇで溶液の濃縮が行われる際発生する冷媒蒸気は
、高圧側と低圧側とを結ぶ冷媒蒸気配管７の冷媒蒸気弁
９を開とすることにより、管７から蒸発器已に導かれ、
蒸発器Ｅを通る管１８からの温水（空調用流体）に熱を
与えて凝縮する。凝縮した冷媒液は、吸収器Ａに流入す
る。ここでは、冷媒液は、管６、冷媒ポンプ１２、管８
及び冷媒液弁１０を通して流れる。The refrigerant vapor generated when the solution is concentrated in the generator G is guided from the pipe 7 to the evaporator by opening the refrigerant vapor valve 9 of the refrigerant vapor pipe 7 connecting the high pressure side and the low pressure side. ,
The hot water (air conditioning fluid) from the pipe 18 passing through the evaporator E is given heat and condensed. The condensed refrigerant liquid flows into absorber A. Here, the refrigerant liquid flows through the pipe 6, the refrigerant pump 12, and the pipe 8.
and flows through the refrigerant liquid valve 10.
冷媒ポンプ１２は停止していても差支えない。There is no problem even if the refrigerant pump 12 is stopped.
また、冷媒蒸気弁９は、外部流体温度検出器１９による
流体温度の検出により、開閉でき冷媒蒸気流量を調節し
外部流体の温度制御ができる。Further, the refrigerant vapor valve 9 can be opened and closed by detecting the fluid temperature by the external fluid temperature detector 19, and the refrigerant vapor flow rate can be adjusted to control the temperature of the external fluid.
吸収器に入った溶液は、吸収塔が低圧のため冷媒の蒸気
圧が高く、冷媒蒸気を放出して温度が低下する。放出さ
れた冷媒蒸気は、蒸発器Ｅで高圧側の冷媒蒸気と共に凝
縮する。溶液は、そのまま吸収器Ａを出て、蒸発器Ｅか
らの冷媒液と混合されて希溶液となって、管１から溶液
熱交換器Ｈに入り、循環して暖房サイクルを形成する。The solution entering the absorber has a high vapor pressure of the refrigerant because the absorption tower has a low pressure, and the temperature of the solution decreases by releasing the refrigerant vapor. The released refrigerant vapor is condensed in the evaporator E together with the refrigerant vapor on the high pressure side. The solution leaves the absorber A intact, mixes with the refrigerant liquid from the evaporator E to form a dilute solution, enters the solution heat exchanger H through the tube 1, and is circulated to form the heating cycle.
また、熱源としてエンジンの排出熱などを用いる場合、
冷温水を製造する以外に熱源を冷却する役目もあるため
、熱源冷却器１５を設けて、冷却水２１で冷却してもよ
い。この場合、熱源の過剰度を熱源温度検出器１６によ
り検出し、それによって熱源冷却器１５への冷却水流量
を自動制御弁２０により調節することによって制御する
。また冷却水は冷却塔１７を設けることによって冷却し
、循環使用できる。In addition, when using engine exhaust heat as a heat source,
Since the function is to cool the heat source in addition to producing hot and cold water, a heat source cooler 15 may be provided to cool the heat source with cooling water 21. In this case, the degree of excess of the heat source is detected by the heat source temperature detector 16, and the flow rate of cooling water to the heat source cooler 15 is controlled by the automatic control valve 20 accordingly. Furthermore, the cooling water can be cooled and circulated by providing a cooling tower 17.
本発明によれば、上記のような構成としたことにより、
暖房時においても、玲房時において冷水を取り出す機器
、すなわち蒸発器で暖房用の温水を取り出すことができ
、同一の空調用流体の経路が冷房と暖房に使用でき、ま
た、暖房能力、冷房能力の調整も簡便にでき、操作上も
簡単で経済的にも有利な装置である。According to the present invention, by having the above configuration,
Even during heating, hot water for heating can be taken out using a device that takes out cold water during heating, that is, an evaporator, and the same air conditioning fluid path can be used for cooling and heating. This device is easy to adjust, easy to operate, and economically advantageous.
第１図は、本発閂の吸収冷温水装置のフロー構成図であ
る。
Ｇ・・・発生器、Ａ・・・吸収器、Ｅ・・・蒸発器、Ｃ
・・・凝縮器、Ｈ・・・溶液熱交換器、１〜４・・・溶
液通路、５〜８・・・冷媒通路、９・・・冷媒蒸気弁、
１０・・・冷媒液弁、１１．１２・・・ポンプ、１３．
１４・・・熱源通路、１５・・・熱源冷却器、１６・・
・熱源温度検出器、１７・・・冷却塔、１８・・・冷温
水通路、１９・・・外部流体温度検出器、２０・・・自
動調節弁、２１〜２５・・・冷却水通路。
特許出願人 株式会社荏原製作所FIG. 1 is a flow diagram of the absorption chiller/heater of the present invention. G... Generator, A... Absorber, E... Evaporator, C
...Condenser, H...Solution heat exchanger, 1-4...Solution passage, 5-8...Refrigerant passage, 9...Refrigerant vapor valve,
10... Refrigerant liquid valve, 11.12... Pump, 13.
14...Heat source passage, 15...Heat source cooler, 16...
- Heat source temperature detector, 17...Cooling tower, 18...Cold/hot water passage, 19...External fluid temperature detector, 20...Automatic control valve, 21-25...Cooling water passage. Patent applicant: Ebara Corporation
Claims (1)
主要構成機器とし、これらを溶液配管、冷媒配管で結ん
でサイクルを構成する吸収冷温水装置において、発生器
又は凝縮器の冷媒蒸気を、吸収器又は蒸発器に導く冷媒
蒸気配管を設け、該冷媒蒸気配管には冷媒蒸気流量調節
弁を設けたことを特徴とする吸収冷温水装置。 ２、請求項１記載の吸収冷温水装置において、発生器へ
の熱源供給通路に熱源冷却器、該熱源冷却器への冷却水
流量調節装置及び熱源過剰度検出器を設けたことを特徴
とする吸収冷温水装置。 ３、請求項１記載の吸収冷温水装置の暖房運転において
、蒸発器を通る外部流体の負荷又は温度を検出して、こ
れに応じて冷媒蒸気流量調節弁を調節することにより、
冷媒蒸気流量を制御して、暖房能力を制御することを特
徴とする吸収冷温水装置の運転方法。 ４、請求項２記載の吸収冷温水装置の運転において、熱
源過剰度検出器で熱源の過剰度を熱源温度又は熱源蒸気
圧で検出し、該熱源の過剰度に応じて熱源冷却器への冷
却水流量を調節することを特徴とする吸収冷温水装置の
運転方法。[Scope of Claims] 1. In an absorption cold/hot water system whose main components are a generator, a condenser, an absorber, an evaporator, and a solution heat exchanger, and which are connected by solution piping and refrigerant piping to form a cycle, 1. An absorption chiller/hot water device, characterized in that a refrigerant vapor piping is provided for guiding refrigerant vapor from a generator or a condenser to an absorber or an evaporator, and the refrigerant vapor piping is provided with a refrigerant vapor flow rate control valve. 2. The absorption cold/hot water system according to claim 1, characterized in that the heat source supply path to the generator is provided with a heat source cooler, a cooling water flow rate adjustment device to the heat source cooler, and a heat source excess degree detector. Absorption chiller/heater. 3. In the heating operation of the absorption cold/hot water apparatus according to claim 1, by detecting the load or temperature of the external fluid passing through the evaporator and adjusting the refrigerant vapor flow rate control valve accordingly,
A method of operating an absorption chiller/heater, characterized in that heating capacity is controlled by controlling a refrigerant vapor flow rate. 4. In the operation of the absorption chilled/heated water apparatus according to claim 2, the excess degree of the heat source is detected by the heat source excess degree detector by the heat source temperature or the heat source vapor pressure, and the excessive degree of the heat source is cooled to the heat source cooler according to the excess degree of the heat source. A method of operating an absorption chiller/heater, characterized by adjusting water flow rate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33023690A JPH04203860A (en) | 1990-11-30 | 1990-11-30 | Absorption type water cooling and/or heating device and operating method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP33023690A JPH04203860A (en) | 1990-11-30 | 1990-11-30 | Absorption type water cooling and/or heating device and operating method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH04203860A true JPH04203860A (en) | 1992-07-24 |
Family
ID=18230387
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP33023690A Pending JPH04203860A (en) | 1990-11-30 | 1990-11-30 | Absorption type water cooling and/or heating device and operating method thereof |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH04203860A (en) |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6269075A (en) * | 1985-09-20 | 1987-03-30 | 川重冷熱工業株式会社 | Method of controlling absorption water heater and chiller |
-
1990
- 1990-11-30 JP JP33023690A patent/JPH04203860A/en active Pending
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6269075A (en) * | 1985-09-20 | 1987-03-30 | 川重冷熱工業株式会社 | Method of controlling absorption water heater and chiller |
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