JP3620639B2 - Absorption refrigerator / cooling / heating machine with safety device - Google Patents

Absorption refrigerator / cooling / heating machine with safety device Download PDF

Info

Publication number
JP3620639B2
JP3620639B2 JP18111199A JP18111199A JP3620639B2 JP 3620639 B2 JP3620639 B2 JP 3620639B2 JP 18111199 A JP18111199 A JP 18111199A JP 18111199 A JP18111199 A JP 18111199A JP 3620639 B2 JP3620639 B2 JP 3620639B2
Authority
JP
Japan
Prior art keywords
pressure
temperature regenerator
temperature
low
regenerator
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
JP18111199A
Other languages
Japanese (ja)
Other versions
JP2001012831A (en
Inventor
邦彦 中島
健一 斉藤
英治 荒井
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.)
Kawasaki Thermal Engineering Co Ltd
Original Assignee
Kawasaki Thermal Engineering Co Ltd
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 Kawasaki Thermal Engineering Co Ltd filed Critical Kawasaki Thermal Engineering Co Ltd
Priority to JP18111199A priority Critical patent/JP3620639B2/en
Publication of JP2001012831A publication Critical patent/JP2001012831A/en
Application granted granted Critical
Publication of JP3620639B2 publication Critical patent/JP3620639B2/en
Anticipated expiration legal-status Critical
Expired - Lifetime legal-status Critical Current

Links

Images

Classifications

    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A30/00Adapting or protecting infrastructure or their operation
    • Y02A30/27Relating to heating, ventilation or air conditioning [HVAC] technologies
    • YGENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02BCLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/62Absorption based systems

Landscapes

  • Sorption Type Refrigeration Machines (AREA)

Description

【0001】
【発明の属する技術分野】
本発明は、運転中に胴内圧力が上昇し、安全弁、ラプチャーディスクなどが作動した場合に、大気開放になることを防止して減圧を維持し、大気開放による腐食の悪影響をなくし、かつ、安全性を確保するとともに復旧を早くすることができる安全装置を備えた吸収冷凍機・冷温水機に関するものである。
【0002】
【従来の技術】
従来から、吸収剤として、例えば臭化リチウムを用い、冷媒として、例えば水を用い、蒸発器、吸収器、凝縮器、低温再生器、高温再生器、低温熱交換器、高温熱交換器及びこれらの機器を接続する溶液管路、冷媒管路で構成された吸収式冷凍機・冷温水機が知られている(例えば、特開平7−174430号公報参照)。
【0003】
従来の吸収式冷凍機・冷温水機においては、高温再生器内部の圧力が大気圧を越えた場合、又は設定圧力を越えた場合に、圧力の上昇を防止する装置として、安全弁、ラプチャーディスク又は破裂板などの圧力上昇防止手段が高温再生器又は高温再生器からの冷媒蒸気配管に設けられている。
【0004】
【発明が解決しようとする課題】
高温再生器の胴内圧力が上昇して安全弁、ラプチャーディスクなどが作動した場合には、高温再生器内の吸収液及び冷媒が外部(系外)に放出され、すなわち、真空部が大気開放となり、吸収冷凍機・冷温水機にとって最も重要な真空の維持ができなくなるとともに、腐食による悪影響を受ける。また、真空部が大気開放されると、復旧に長時間を要するという問題がある。
【0005】
本発明は上記の点に鑑みなされたもので、本発明の目的は、安全弁、ラプチャーディスクなどの吹出し口を低圧側に接続して大気開放にならないように構成し、減圧が維持されるようにして、安全を確保するとともに、機械に与える悪影響、とくに大気開放による腐食の悪影響をなくし、かつ、安全弁、ラプチャーディスクなどの作動後の復旧を迅速・容易に行うことができる吸収冷凍機・冷温水機を提供することにある。
また、本発明の他の目的は、安全弁、ラプチャーディスクなどが作動して冷媒蒸気・吸収液が流出した際の温度変化又は圧力変化を検知して、高温再生器での燃焼を停止し、又は加熱熱源の供給を停止し停止動作に入るとともに、外部へ異常を知らせる電気的な回路を装備した吸収冷凍機・冷温水機を提供することにある。
【0006】
【課題を解決するための手段】
上記の目的を達成するために、本発明の安全装置を備えた吸収冷凍機・冷温水機は、吸収器、蒸発器、低温熱交換器、低温再生器、高温熱交換器、高温再生器、凝縮器、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管を構成要素とし、高温再生器内部の圧力が大気圧を越えた場合又は設定圧力を越えた場合に、高温再生器内部の圧力の上昇を防止するために、安全弁、ラプチャーディスク及び破裂板のいずれかの圧力上昇防止手段が高温再生器又は高温再生器からの冷媒蒸気配管に設けられ、この圧力上昇防止手段の吹出し口が大気開放となっている二重効用吸収冷凍機・冷温水機において、運転中に高温再生器内部の圧力が上昇して圧力上昇防止手段が作動した場合に、運転中は常に略真空になるように設計されている低圧部へ高圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くするために、圧力上昇防止手段の吹出し口を圧力逃し配管を介して低圧部に接続して構成されている(図1参照)。
【0007】
また、本発明の安全装置を備えた吸収冷凍機・冷温水機は、吸収器、蒸発器、低温熱交換器、低温再生器、高温熱交換器、高温再生器、凝縮器、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管を構成要素とし、高温再生器内部の圧力が大気圧を越えた場合又は設定圧力を越えた場合に、高温再生器内部の圧力の上昇を防止するために、安全弁、ラプチャーディスク及び破裂板のいずれかの圧力上昇防止手段が高温再生器又は高温再生器からの冷媒蒸気配管に設けられ、この圧力上昇防止手段の吹出し口が大気開放となっている二重効用吸収冷凍機・冷温水機において、運転中に高温再生器内部の圧力が上昇して圧力上昇防止手段が作動した場合に、運転中は常に略真空になるように設計されている低圧部へ高圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くするために、圧力上昇防止手段の吹出し口を圧力逃し配管を介して低圧部に接続するとともに、高圧側の圧力上昇防止手段が作動して冷媒蒸気及び吸収液が流出した際の温度変化又は圧力変化を感知できるように、圧力逃し配管に温度測定装置又は圧力測定装置を設け、さらに、感知した温度変化又は圧力変化により高温再生器への加熱熱源の供給を停止して停止動作に入るとともに、外部へ異常を知らせることができるように、温度測定装置又は圧力測定装置と安全制御・監視装置とを電気的に接続したことを特徴としている(図2参照)。
【0008】
また、本発明の安全装置を備えた吸収冷凍機・冷温水機は、吸収器、蒸発器、低温熱交換器、低温再生器、中温熱交換器、中温再生器、高温熱交換器、高温再生器、凝縮器、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管を構成要素とし、高温再生器内部の圧力が大気圧を越えた場合又は設定圧力を越えた場合に、高温再生器内部の圧力の上昇を防止するために、安全弁、ラプチャーディスク及び破裂板のいずれかの圧力上昇防止手段が高温再生器又は高温再生器からの冷媒蒸気配管に設けられ、この圧力上昇防止手段の吹出し口が大気開放となっている多重効用吸収冷凍機・冷温水機において、運転中に高温再生器内部の圧力が上昇して圧力上昇防止手段が作動した場合に、圧力レベルが低位となる中温再生器へ高圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くするために、圧力上昇防止手段の吹出し口を圧力逃し配管を介して中温再生器に接続し、さらに、中温再生器又は中温再生器からの冷媒蒸気配管にラプチャーディスク、破裂板及び安全弁のいずれかの圧力上昇防止手段を設け、運転中に中温再生器内部の圧力が上昇して中温再生器の圧力上昇防止手段が作動した場合に、運転中は常に略真空になるように設計されている低圧部へ中圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くするために、中温再生器の圧力上昇防止手段の吹出し口を圧力逃し配管を介して低圧部に接続したことを特徴としている(図3、図5参照)。
【0009】
また、本発明の安全装置を備えた吸収冷凍機・冷温水機は、吸収器、蒸発器、低温熱交換器、低温再生器、中温熱交換器、中温再生器、高温熱交換器、高温再生器、凝縮器、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管を構成要素とし、高温再生器内部の圧力が大気圧を越えた場合又は設定圧力を越えた場合に、高温再生器内部の圧力の上昇を防止するために、安全弁、ラプチャーディスク及び破裂板のいずれかの圧力上昇防止手段が高温再生器又は高温再生器からの冷媒蒸気配管に設けられ、この圧力上昇防止手段の吹出し口が大気開放となっている多重効用吸収冷凍機・冷温水機において、運転中に高温再生器内部の圧力が上昇して圧力上昇防止手段が作動した場合に、圧力レベルが低位となる中温再生器へ高圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くするために、圧力上昇防止手段の吹出し口を圧力逃し配管を介して中温再生器に接続し、さらに、中温再生器又は中温再生器からの冷媒蒸気配管にラプチャーディスク、破裂板及び安全弁のいずれかの圧力上昇防止手段を設け、運転中に中温再生器内部の圧力が上昇して中温再生器の圧力上昇防止手段が作動した場合に、運転中は常に略真空になるように設計されている低圧部へ中圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くするために、中温再生器の圧力上昇防止手段の吹出し口を圧力逃し配管を介して低圧部に接続するとともに、高圧側の圧力上昇防止手段が作動して冷媒蒸気及び吸収液が流出した際の温度変化又は圧力変化を感知できるように、高圧側からの圧力逃し配管に温度測定装置又は圧力測定装置を設け、さらに、感知した温度変化又は圧力変化により高温再生器への加熱熱源の供給を停止して停止動作に入るとともに、外部へ異常を知らせることができるように、温度測定装置又は圧力測定装置と安全制御・監視装置とを電気的に接続したことを特徴としている(図4、図6参照)。
【0010】
また、本発明の安全装置を備えた吸収冷凍機・冷温水機は、吸収器、蒸発器、低温熱交換器、低温再生器、中温熱交換器、中温再生器、高温熱交換器、高温再生器、凝縮器、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管を構成要素とし、高温再生器内部の圧力が大気圧を越えた場合又は設定圧力を越えた場合に、高温再生器内部の圧力の上昇を防止するために、安全弁、ラプチャーディスク及び破裂板のいずれかの圧力上昇防止手段が高温再生器又は高温再生器からの冷媒蒸気配管に設けられ、この圧力上昇防止手段の吹出し口が大気開放となっている多重効用吸収冷凍機・冷温水機において、運転中に高温再生器内部の圧力が上昇して圧力上昇防止手段が作動した場合に、運転中は常に略真空になるように設計されている低温再生器などの低圧部へ高圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くするために、圧力上昇防止手段の吹出し口を圧力逃し配管を介して低圧部に接続したことを特徴としている(図7、図9参照)。
【0011】
さらに、本発明の安全装置を備えた吸収冷凍機・冷温水機は、吸収器、蒸発器、低温熱交換器、低温再生器、中温熱交換器、中温再生器、高温熱交換器、高温再生器、凝縮器、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管を構成要素とし、高温再生器内部の圧力が大気圧を越えた場合又は設定圧力を越えた場合に、高温再生器内部の圧力の上昇を防止するために、安全弁、ラプチャーディスク及び破裂板のいずれかの圧力上昇防止手段が高温再生器又は高温再生器からの冷媒蒸気配管に設けられ、この圧力上昇防止手段の吹出し口が大気開放となっている多重効用吸収冷凍機・冷温水機において、運転中に高温再生器内部の圧力が上昇して圧力上昇防止手段が作動した場合に、運転中は常に略真空になるように設計されている低温再生器などの低圧部へ高圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くするために、圧力上昇防止手段の吹出し口を圧力逃し配管を介して低圧部に接続するとともに、高圧側の圧力上昇防止手段が作動して冷媒蒸気及び吸収液が流出した際の温度変化又は圧力変化を感知できるように、高圧側からの圧力逃し配管に温度測定装置又は圧力測定装置を設け、さらに、感知した温度変化又は圧力変化により高温再生器への加熱熱源の供給を停止して停止動作に入るとともに、外部へ異常を知らせることができるように、温度測定装置又は圧力測定装置と安全制御・監視装置とを電気的に接続したことを特徴としている(図8、図10参照)。
【0012】
上記の吸収冷凍機・冷温水機において、中温熱交換器及び中温再生器を設ける場合は、高圧側の圧力上昇防止手段として安全弁を用い、中圧側の圧力上昇防止手段としてラプチャーディスク(又は破裂板)を用いることが望ましい(図3〜図6参照)。
また、高温再生器の加熱熱源としては、燃料燃焼装置の燃焼熱、蒸気(スチーム)、ガスエンジン、ガスタービンなどの熱機関から発生する燃焼排ガスなどを用いることができる。
また、高温再生器を設ける代りに、貫流ボイラなどを設けた構成とすることも可能である。
【0013】
【発明の実施の形態】
以下、本発明の実施の形態を吸収冷凍機の場合について説明するが、本発明は吸収冷凍機の場合に限定されるものではなく、吸収冷温水機の場合にも適用できるものである。
図1は、本発明の実施の第1形態による安全装置を備えた二重効用吸収冷凍機を示している。図1に示すように、蒸発器10、吸収器12、凝縮器14、低温再生器16、ガス又は油等の燃料を直接燃焼させて吸収液を加熱・濃縮するための燃焼装置17を有する高温再生器18、低温熱交換器20、高温熱交換器22、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管等を構成要素として二重効用吸収冷凍機が構成されている。
【0014】
高温再生器18からの冷媒蒸気配管24には安全弁、ラプチャーディスク、破裂板などの圧力上昇防止手段26(図1では一例として安全弁を示している。以下、安全弁26と記す場合がある)が接続され、この安全弁26の吹出し口28が圧力逃し配管30を介して低温再生器16に接続されている。
【0015】
上記のように構成された二重効用吸収冷凍機において、吸収器12内の吸収液(稀液、例えば臭化リチウム水溶液)は溶液ポンプ(低温ポンプ)32により低温熱交換器20及び高温熱交換器22を経て高温再生器18に送られ、燃焼装置17で燃料を燃焼させ、発生する燃焼ガスにより、吸収液は加熱されて濃縮される。なお、高温再生器18の加熱熱源として、燃焼装置を設けて燃料の燃焼熱を利用する代りに、蒸気(スチーム)、ガスエンジン、ガスタービンなどの熱機関からの排気ガスを用いることも可能である。
【0016】
高温再生器18からの吸収液は高温熱交換器22を経て低温再生器16へ送られ、ここで高温再生器18からの冷媒蒸気(例えば水蒸気)によって加熱・濃縮される。ついで、低温再生器16からの吸収液は低温熱交換器20に送られた後、吸収器12に導入され、冷却水により間接的に冷却されるとともに、蒸発器10からの冷媒液(例えば水)と混合して稀液となる。
一方、高温再生器18からの冷媒蒸気は低温再生器16に入り、ここで吸収液を加熱することで冷媒蒸気は凝縮・液化して凝縮器14に入る。低温再生器16において吸収液が濃縮されるときに発生した冷媒蒸気が凝縮器14に入って冷却水により間接的に冷却されて凝縮した後、冷媒液(例えば水)は蒸発器10に入り、この凝縮した冷媒水が冷媒ポンプ34により蒸発器10の伝熱管(水が流通している)に散布されて冷水が得られる。
【0017】
運転中に高温再生器18内部の圧力が上昇して安全弁26が作動した場合でも、運転中に常に略真空になるように設計されている低温再生器16へ、高温再生器18からの冷媒蒸気及び吸収液が放出されるので、安全が確保されるとともに、大気開放が防止され、かつ安全確認後の復旧を迅速、容易に行うことができる。
なお、低温再生器16などの低圧部は、冷房運転中の性能を維持するために、真空ポンプ、自動抽気装置などにより常に高真空を保つようになっている。また、停止中は高温再生器18の加熱は行われず、低温側、高温側ともに同圧となり、かつ略真空であるため安全弁26が作動することはない。
本実施形態においては、安全装置は、安全弁26、安全弁の吹出し口28と低温再生器16などの低圧部とを接続する圧力逃し配管30で構成される。
【0018】
以上は、吸収液が吸収器12から高温再生器18へ汲み上げられた後、低温再生器16へ流れるように接続・配置されたシリーズフロータイプの二重効用吸収冷凍機について説明したが、吸収液が吸収器から低温再生器へ汲み上げられ、さらに高温再生器へ汲み上げられるように接続・配置されたリバースフロータイプの二重効用吸収冷凍機や、吸収液が吸収器から高温再生器及び低温再生器へ同時に汲み上げられるように接続・配置されたパラレルフロータイプの二重効用吸収冷凍機に適用することも、勿論可能である。
また、吸収冷凍機の代りに吸収冷温水機に適用することも、勿論可能である。この場合は、低温再生器の冷媒配管と蒸発器との間に冷暖切替弁(図示略)を設け、冷水運転時は冷暖切替弁を閉とし、温水運転時は冷暖切替弁を開とし、吸収器及び凝縮器への冷却水の供給を止めるようにする。なお、高温再生器の代りに貫流ボイラを用いることも可能である。
【0019】
図2は、本発明の実施の第2形態による安全装置を備えた二重効用吸収冷凍機を示している。本実施形態は、高圧側の圧力上昇防止手段、例えば安全弁26の吹出し口28と低圧部とを接続する圧力逃し配管30に温度測定装置、例えば温度センサー、又は圧力測定装置、例えば圧力センサーを設け、この温度センサー又は圧力センサー36と外部(系外)の安全制御・監視装置38とを電気的に接続して、高圧側の安全弁26が作動して冷媒蒸気及び吸収液が流出した際の温度変化又は圧力変化を検知して、検知信号を送ることにより、高温再生器18での燃焼を停止し、又は加熱熱源の供給を停止して、停止動作に入るように電気的な安全回路を組み、外部へ異常を知らせることができるように構成されている。
本実施形態においては、高温再生器18内の圧力が上昇し、安全弁26が作動した場合に、吹出し口28を圧力逃し配管30を介して低圧側に接続し圧力を逃がして安全を確保すると同時に、大気開放を防止し、かつ安全確認後の復旧を迅速、容易にすることができ、同時に安全停止動作に入り、外部へ異常を知らせることができる。
本実施形態においては、安全装置は、安全弁26、安全弁の吹出し口28と低温再生器16などの低圧部とを接続する圧力逃し配管30、温度センサー又は圧力センサー36、この温度センサー又は圧力センサー36に接続された安全制御・監視装置38で構成される。他の構成及び作用は実施の第1形態の場合と同様である。
【0020】
図3は、本発明の実施の第3形態による安全装置を備えた多重効用吸収冷凍機を示している。図3では一例として三重効用吸収冷凍機の場合を示している。図3に示すように、蒸発器10、吸収器12、凝縮器14、低温再生器16、中温再生器40、ガス又は油等の燃料を直接燃焼させて吸収液を加熱・濃縮するための燃焼装置17を有する高温再生器18、低温熱交換器20、中温熱交換器42、高温熱交換器22、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管等を構成要素として三重効用吸収冷凍機が構成されている。
【0021】
高温再生器18からの冷媒蒸気配管24には安全弁、ラプチャーディスク、破裂板などの圧力上昇防止手段26(図3では一例として安全弁を示している。以下、安全弁26と記す場合がある)が接続され、この安全弁26の吹出し口28が圧力逃し配管30を介して中温再生器40に接続されている。
中温再生器40からの冷媒蒸気配管44には、ラプチャーディスク、破裂板、安全弁などの圧力上昇防止手段46(図3では一例としてラプチャーディスクを示している。以下、ラプチャーディスク46と記す場合がある)が接続され、このラプチャーディスク46の吹出し口48が圧力逃し配管50を介して低温再生器16に接続されている。
【0022】
上記のように構成された三重効用吸収冷凍機において、吸収器12内の吸収液(稀液、例えば臭化リチウム水溶液)は溶液ポンプ(低温ポンプ)32により低温熱交換器20、中温熱交換器42及び高温熱交換器22を経て高温再生器18に送られ、燃焼装置17で燃料を燃焼させ、発生する燃焼ガスにより、吸収液は加熱されて濃縮される。なお、高温再生器18の加熱熱源として、燃焼装置を設けて燃料の燃焼熱を利用する代りに、蒸気(スチーム)、ガスエンジン、ガスタービンなどの熱機関からの排気ガスを用いることも可能である。
【0023】
高温再生器18からの吸収液は高温熱交換器22を経て中温再生器40へ送られ、ここで高温再生器18からの冷媒蒸気(例えば水蒸気)によって加熱・濃縮される。ついで、中温再生器40からの吸収液は中温熱交換器42に送られた後、低温再生器16に導入され、ここで中温再生器40からの冷媒蒸気によって加熱・濃縮される。低温再生器16からの吸収液は低温熱交換器20に送られた後、吸収器12に導入され、冷却水により間接的に冷却されるとともに、蒸発器10からの冷媒液(例えば水)と混合して稀液となる。
【0024】
一方、高温再生器18からの冷媒蒸気は中温再生器40に入り、ここで吸収液を加熱することで冷媒蒸気は一部が凝縮・液化して低温再生器16に入る。中温再生器40において吸収液が濃縮されるときに発生した冷媒蒸気は、冷媒蒸気配管44を経て低温再生器16に導入される。
低温再生器16において吸収液が濃縮されるときに発生した冷媒蒸気が凝縮器14に入って冷却水により間接的に冷却されて凝縮した後、冷媒液(例えば水)は蒸発器10に入り、この凝縮した冷媒水が冷媒ポンプ34により蒸発器10の伝熱管(水が流通している)に散布されて冷水が得られる。
【0025】
運転中に高温再生器18内部の圧力が上昇して安全弁26が作動した場合でも、運転中に常に略真空になるように設計されている中温再生器40へ、高温再生器18からの冷媒蒸気及び吸収液が放出されるので、安全が確保されるとともに、大気開放が防止され、かつ安全確認後の復旧を迅速、容易に行うことができる。
また、同様に、運転中に中温再生器40内部の圧力が上昇してラプチャーディスク46が作動した場合でも、運転中に常に略真空になるように設計されている低温再生器16へ、中温再生器40からの冷媒蒸気及び吸収液が放出されるので、安全が確保されるとともに、大気開放が防止され、かつ安全確認後の復旧を迅速、容易に行うことができる。
このように、安全弁26やラプチャーディスク46の吹出し口を、圧力逃し配管を介して順次低圧側に接続して圧力を逃がすことにより、胴内容積を有効に減圧用として利用することができる。また、各圧力レベルに応じて、高圧側は安全弁、低圧側はラプチャーディスクなどのように、それぞれの特徴を生かして使い分けすることが望ましい。
【0026】
なお、低温再生器16などの低圧部は、冷房運転中の性能を維持するために、真空ポンプ、自動抽気装置などにより常に高真空を保つようになっている。また、停止中は高温再生器18の加熱は行われず、低温側、高温側ともに同圧となり、かつ略真空であるため安全弁26が作動することはない。
本実施形態においては、安全装置は、安全弁26、安全弁の吹出し口28と中温再生器40とを接続する圧力逃し配管30、ラプチャーディスク46、ラプチャーディスクの吹出し口48と低温再生器16などの低圧部とを接続する圧力逃し配管50で構成される。
【0027】
以上は、吸収液が吸収器12から高温再生器18へ汲み上げられた後、中温再生器40を経て低温再生器16へ流れるように接続・配置されたシリーズフロータイプの三重効用吸収冷凍機について説明したが、吸収液が吸収器から低温再生器へ汲み上げられ、中温再生器を経てさらに高温再生器へ汲み上げられるように接続・配置されたリバースフロータイプの三重効用吸収冷凍機や、吸収液が吸収器から高温再生器、中温再生器及び低温再生器へ同時に汲み上げられるように接続・配置されたパラレルフロータイプの三重効用吸収冷凍機に適用することも、勿論可能である。なお、四重効用以上の多重効用吸収冷凍機に適用することも可能である。
また、吸収冷凍機の代りに吸収冷温水機に適用することも、勿論可能である。この場合は、低温再生器又は/及び中温再生器の冷媒配管と蒸発器との間に冷暖切替弁(図示略)を設け、冷水運転時は冷暖切替弁を閉とし、温水運転時は冷暖切替弁を開とし、吸収器及び凝縮器への冷却水の供給を止めるようにする。なお、高温再生器の代りに貫流ボイラを用いることも可能である。
【0028】
図4は、本発明の実施の第4形態による安全装置を備えた三重効用吸収冷凍機を示している。本実施形態は、高圧側の圧力上昇防止手段、例えば安全弁26の吹出し口28と低圧部とを接続する圧力逃し配管30に温度測定装置、例えば温度センサー、又は圧力測定装置、例えば圧力センサーを設け、この温度センサー又は圧力センサー36と外部(系外)の安全制御・監視装置38とを電気的に接続して、高圧側の安全弁26が作動して冷媒蒸気及び吸収液が流出した際の温度変化又は圧力変化を検知して、検知信号を送ることにより、高温再生器18での燃焼を停止し、又は加熱熱源の供給を停止して、停止動作に入るように電気的な安全回路を組み、外部へ異常を知らせることができるように構成されている。
本実施形態においては、高温再生器18内の圧力が上昇し、安全弁26が作動した場合に、吹出し口28を圧力逃し配管30を介して低圧側に接続し圧力を逃がして安全を確保すると同時に、大気開放を防止し、かつ安全確認後の復旧を迅速、容易にすることができ、同時に安全停止動作に入り、外部へ異常を知らせることができる。
本実施形態においては、安全装置は、安全弁26、安全弁の吹出し口28と中温再生器40とを接続する圧力逃し配管30、温度センサー又は圧力センサー36、この温度センサー又は圧力センサー36に接続された安全制御・監視装置38、ラプチャーディスク46、ラプチャーディスクの吹出し口48と低温再生器16などの低圧部とを接続する圧力逃し配管50で構成される。他の構成及び作用は実施の第3形態の場合と同様である。
【0029】
図5は、本発明の実施の第5形態による安全装置を備えた三重効用吸収冷凍機を示している。本実施形態は、吸収器12からの吸収液が、低温再生器16へ汲み上げられた後、溶液ポンプ52にて中温再生器40へ供給され、さらに溶液ポンプ54により高温再生器18へ供給されるように各機器及び配管が配置・接続されたリバースフロータイプの吸収冷凍機に適用したものである。他の構成及び作用は実施の第3形態の場合と同様である。
【0030】
図6は、本発明の実施の第6形態による安全装置を備えた三重効用吸収冷凍機を示している。本実施形態は、吸収器12からの吸収液が、低温再生器16へ汲み上げられた後、溶液ポンプ52にて中温再生器40へ供給され、さらに溶液ポンプ54により高温再生器18へ供給されるように各機器及び配管が配置・接続されたリバースフロータイプの吸収冷凍機に適用したものである。他の構成及び作用は実施の第4形態の場合と同様である。
【0031】
図7は、本発明の実施の第7形態による安全装置を備えた三重効用吸収冷凍機を示している。本実施形態は、多重効用、例えば三重効用形吸収冷凍機又は冷温水機の高温再生器18からの圧力逃し配管30aを低温再生器16などの低圧部に直接つなぐようにして、中温再生器40からの圧力逃し配管を省略するように構成したものである。他の構成及び作用は実施の第3形態の場合と同様である。
【0032】
図8は、本発明の実施の第8形態による安全装置を備えた三重効用吸収冷凍機を示している。本実施形態は、多重効用、例えば三重効用形吸収冷凍機又は冷温水機の高温再生器18からの圧力逃し配管30aを低温再生器16などの低圧部に直接つなぐようにして、中温再生器40からの圧力逃し配管を省略するように構成したものである。他の構成及び作用は実施の第4形態の場合と同様である。
【0033】
図9は、本発明の実施の第9形態による安全装置を備えた三重効用吸収冷凍機を示している。本実施形態は、多重効用、例えば三重効用形吸収冷凍機又は冷温水機の高温再生器18からの圧力逃し配管30aを低温再生器16などの低圧部に直接つなぐようにして、中温再生器40からの圧力逃し配管を省略するように構成したものである。他の構成及び作用は実施の第5形態の場合と同様である
【0034】
図10は、本発明の実施の第10形態による安全装置を備えた三重効用吸収冷凍機を示している。本実施形態は、多重効用、例えば三重効用形吸収冷凍機又は冷温水機の高温再生器18からの圧力逃し配管30aを低温再生器16などの低圧部に直接つなぐようにして、中温再生器40からの圧力逃し配管を省略するように構成したものである。他の構成及び作用は実施の第6形態の場合と同様である。
【0035】
【発明の効果】
本発明は上記のように構成されているので、つぎのような効果を奏する。
(1) 高圧側の安全弁、ラプチャーディスク、破裂板などの圧力上昇防止手段の吹出し口を低圧側に接続して大気開放にならないように構成されているので、安全弁等の圧力上昇防止手段が作動した場合でも、減圧が維持され、安全を確保することができるとともに、機械に与える腐食などの悪影響をなくし、かつ、安全弁等の圧力上昇防止手段作動後の復旧を迅速・容易に行うことができる。
(2) 高圧側の安全弁等の圧力上昇防止手段からの圧力逃し配管に温度測定装置又は圧力測定装置を設け、この温度測定装置又は圧力測定装置を安全制御・監視装置に接続するように構成する場合は、上記(1)の効果に加えて、安全弁等の圧力上昇防止手段の作動により流出した冷媒蒸気・吸収液の温度変化又は圧力変化を検知して、検知信号を安全制御・監視装置へ送り、高温再生器での燃焼を停止するか、又は加熱熱源の供給を停止し停止動作に入るとともに、外部へ異常を知らせることができる。
【図面の簡単な説明】
【図1】本発明の実施の第1形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図2】本発明の実施の第2形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図3】本発明の実施の第3形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図4】本発明の実施の第4形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図5】本発明の実施の第5形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図6】本発明の実施の第6形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図7】本発明の実施の第7形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図8】本発明の実施の第8形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図9】本発明の実施の第9形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【図10】本発明の実施の第10形態による安全装置を備えた吸収冷凍機の系統的概略構成図である。
【符号の説明】
10 蒸発器
12 吸収器
14 凝縮器
16 低温再生器
17 燃焼装置
18 高温再生器
20 低温熱交換器
22 高温熱交換器
24、44 冷媒蒸気配管
26 安全弁(圧力上昇防止手段)
28、48 吹出し口
30、30a、50 圧力逃し配管
32、52、54 溶液ポンプ
34 冷媒ポンプ
36 温度センサー又は圧力センサー
38 安全制御・監視装置
40 中温再生器
42 中温熱交換器
46 ラプチャーディスク(圧力上昇防止手段)
[0001]
BACKGROUND OF THE INVENTION
In the present invention, when the in-cylinder pressure rises during operation and a safety valve, a rupture disk, etc. are operated, the release to the atmosphere is prevented to maintain a reduced pressure, the adverse effects of corrosion due to the release to the atmosphere are eliminated, and The present invention relates to an absorption refrigerator / cooling / heating machine equipped with a safety device capable of ensuring safety and speeding recovery.
[0002]
[Prior art]
Conventionally, as an absorbent, for example, lithium bromide is used, and as a refrigerant, for example, water is used. An evaporator, an absorber, a condenser, a low temperature regenerator, a high temperature regenerator, a low temperature heat exchanger, a high temperature heat exchanger, and these There is known an absorption refrigerator / cooling / heating machine composed of a solution line and a refrigerant line for connecting these devices (see, for example, JP-A-7-174430).
[0003]
In a conventional absorption refrigerator / cooling / heating machine, when the pressure inside the high-temperature regenerator exceeds the atmospheric pressure or exceeds the set pressure, a safety valve, rupture disk or Pressure rise prevention means such as a rupture disc is provided in the high temperature regenerator or the refrigerant vapor pipe from the high temperature regenerator.
[0004]
[Problems to be solved by the invention]
When the internal pressure of the high-temperature regenerator rises and the safety valve, rupture disk, etc. are activated, the absorbing liquid and refrigerant in the high-temperature regenerator are released to the outside (outside the system), that is, the vacuum part is opened to the atmosphere. The vacuum, which is the most important for absorption refrigerators and cold / hot water machines, cannot be maintained, and is adversely affected by corrosion. Further, when the vacuum part is opened to the atmosphere, there is a problem that it takes a long time to recover.
[0005]
The present invention has been made in view of the above points, and an object of the present invention is to connect a discharge port such as a safety valve and a rupture disk to the low pressure side so as not to be opened to the atmosphere so that the reduced pressure is maintained. Absorption chiller / cold hot / cold water that ensures safety, eliminates adverse effects on machines, especially corrosion caused by opening to the atmosphere, and enables quick and easy recovery after operation of safety valves, rupture disks, etc. Is to provide a machine.
Another object of the present invention is to detect a temperature change or a pressure change when a safety valve, a rupture disk or the like is activated and refrigerant vapor / absorbed liquid flows out to stop combustion in the high temperature regenerator, or The object is to provide an absorption refrigerator / cooling / heating machine equipped with an electric circuit that stops supplying the heating heat source and enters a stopping operation and notifies the outside of the abnormality.
[0006]
[Means for Solving the Problems]
In order to achieve the above object, the absorption refrigerator / cooling / heating machine equipped with the safety device of the present invention includes an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a high temperature heat exchanger, a high temperature regenerator, Condensers, solution circulation pumps, solution pipes connecting these devices, and refrigerant pipes are the constituent elements. When the pressure inside the high-temperature regenerator exceeds the atmospheric pressure or exceeds the set pressure, the inside of the high-temperature regenerator In order to prevent an increase in the pressure of the refrigerant, a pressure rise prevention means of any one of a safety valve, a rupture disk and a rupture disc is provided in the high temperature regenerator or the refrigerant vapor pipe from the high temperature regenerator, and the outlet of the pressure rise prevention means In dual-effect absorption chillers and hot / cold water heaters that are open to the atmosphere, when the pressure inside the high-temperature regenerator rises during operation and the pressure rise prevention means is activated, the vacuum is always maintained during operation. Is designed to In order to release the high-pressure side refrigerant vapor and absorption liquid to the pressure part to prevent release to the atmosphere and to speed up recovery after safety confirmation, the outlet of the pressure rise prevention means is connected to the low-pressure part via a pressure relief pipe. (See FIG. 1).
[0007]
The absorption refrigerator / cooling / heating machine equipped with the safety device of the present invention includes an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a high temperature heat exchanger, a high temperature regenerator, a condenser, a solution circulation pump, In addition, the solution piping and refrigerant piping that connect these devices are used as components, and when the internal pressure of the high-temperature regenerator exceeds the atmospheric pressure or exceeds the set pressure, the pressure inside the high-temperature regenerator is prevented from rising. Therefore, the pressure rise prevention means of any one of the safety valve, the rupture disc and the rupture disc is provided in the high temperature regenerator or the refrigerant vapor pipe from the high temperature regenerator, and the outlet of the pressure rise prevention means is open to the atmosphere. Low pressure designed to be almost vacuum during operation when the pressure rise prevention means is activated when the pressure inside the high-temperature regenerator rises during operation in a double-effect absorption refrigerator / cooling / heating machine High pressure side refrigerant steam In addition, in order to release the absorption liquid and prevent the air from being released to the atmosphere, and to speed up recovery after confirming safety, the outlet of the pressure rise prevention means is connected to the low pressure part via the pressure relief pipe, A temperature measuring device or a pressure measuring device is provided in the pressure relief pipe so that the pressure rise prevention means can be activated to sense a temperature change or a pressure change when the refrigerant vapor and the absorption liquid flow out. The temperature measurement device or the pressure measurement device and the safety control / monitoring device are electrically connected so that the supply of the heating heat source to the high-temperature regenerator is stopped due to the pressure change and the stop operation is started. (See FIG. 2).
[0008]
Also, the absorption refrigerator / cooling / heating machine equipped with the safety device of the present invention includes an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a medium temperature heat exchanger, a medium temperature regenerator, a high temperature heat exchanger, and a high temperature regeneration. High temperature regeneration when the internal pressure of the high temperature regenerator exceeds the atmospheric pressure or exceeds the set pressure. In order to prevent an increase in pressure inside the regenerator, a pressure rise prevention means of any one of a safety valve, a rupture disk and a rupture disk is provided in the high temperature regenerator or the refrigerant vapor pipe from the high temperature regenerator. In a multi-effect absorption refrigerator / chiller / heater with the air outlet open to the atmosphere, when the pressure inside the high-temperature regenerator rises and the pressure rise prevention means is activated during operation, the medium temperature is low. High pressure side to regenerator In order to release the refrigerant vapor and the absorbing liquid to prevent opening to the atmosphere and to speed up recovery after safety confirmation, the outlet of the pressure rise prevention means is connected to the intermediate temperature regenerator via the pressure relief pipe, The intermediate temperature regenerator or the refrigerant vapor piping from the intermediate temperature regenerator is provided with a pressure rise prevention means of any one of the rupture disk, rupture disk and safety valve, and the pressure inside the intermediate temperature regenerator increases during operation and the pressure of the intermediate temperature regenerator When the rise prevention means is activated, the refrigerant vapor and the absorption liquid on the medium pressure side are released to the low pressure part that is designed to be almost vacuum during operation to prevent release to the atmosphere, and after safety confirmation In order to speed up the recovery, the outlet of the pressure rise prevention means of the intermediate temperature regenerator is connected to the low pressure part through the pressure relief pipe (see FIGS. 3 and 5).
[0009]
Also, the absorption refrigerator / cooling / heating machine equipped with the safety device of the present invention includes an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a medium temperature heat exchanger, a medium temperature regenerator, a high temperature heat exchanger, and a high temperature regeneration. High temperature regeneration when the internal pressure of the high temperature regenerator exceeds the atmospheric pressure or exceeds the set pressure. In order to prevent an increase in pressure inside the regenerator, a pressure rise prevention means of any one of a safety valve, a rupture disk and a rupture disk is provided in the high temperature regenerator or the refrigerant vapor pipe from the high temperature regenerator. In a multi-effect absorption refrigerator / chiller / heater with the air outlet open to the atmosphere, when the pressure inside the high-temperature regenerator rises and the pressure rise prevention means is activated during operation, the medium temperature is low. High pressure side to regenerator In order to release the refrigerant vapor and the absorbing liquid to prevent opening to the atmosphere and to speed up recovery after safety confirmation, the outlet of the pressure rise prevention means is connected to the intermediate temperature regenerator via the pressure relief pipe, The intermediate temperature regenerator or the refrigerant vapor piping from the intermediate temperature regenerator is provided with a pressure rise prevention means of any one of the rupture disk, rupture disk and safety valve, and the pressure inside the intermediate temperature regenerator increases during operation and the pressure of the intermediate temperature regenerator When the rise prevention means is activated, the refrigerant vapor and the absorption liquid on the medium pressure side are released to the low pressure part that is designed to be almost vacuum during operation to prevent release to the atmosphere, and after safety confirmation In order to speed up the recovery, the outlet of the pressure rise prevention means of the intermediate temperature regenerator is connected to the low pressure part via the pressure relief pipe, and the pressure rise prevention means on the high pressure side is activated and the refrigerant vapor and the absorption liquid flow out. Temperature when A temperature measuring device or pressure measuring device is provided in the pressure relief pipe from the high pressure side so that the heat source can be detected, and the supply of the heating heat source to the high temperature regenerator is stopped by the detected temperature change or pressure change. The temperature measuring device or the pressure measuring device and the safety control / monitoring device are electrically connected so that the stop operation can be started and the abnormality can be notified to the outside (see FIGS. 4 and 6). ).
[0010]
Also, the absorption refrigerator / cooling / heating machine equipped with the safety device of the present invention includes an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a medium temperature heat exchanger, a medium temperature regenerator, a high temperature heat exchanger, and a high temperature regeneration. High temperature regeneration when the internal pressure of the high temperature regenerator exceeds the atmospheric pressure or exceeds the set pressure. In order to prevent an increase in pressure inside the regenerator, a pressure rise prevention means of any one of a safety valve, a rupture disk and a rupture disk is provided in the high temperature regenerator or the refrigerant vapor pipe from the high temperature regenerator. In a multi-effect absorption refrigerator / chiller / heater with the air outlet open to the atmosphere, when the pressure inside the high-temperature regenerator rises during operation and the pressure rise prevention means is activated, the vacuum is always maintained during operation. Designed to be In order to release the high-pressure side refrigerant vapor and absorption liquid to the low-pressure part of a low-temperature regenerator, etc. It is characterized in that it is connected to a low-pressure part via a pipe (see FIGS. 7 and 9).
[0011]
Furthermore, the absorption refrigerator / cooling / heating machine equipped with the safety device of the present invention includes an absorber, an evaporator, a low temperature heat exchanger, a low temperature regenerator, a medium temperature heat exchanger, a medium temperature regenerator, a high temperature heat exchanger, and a high temperature regeneration. High temperature regeneration when the internal pressure of the high temperature regenerator exceeds the atmospheric pressure or exceeds the set pressure. In order to prevent an increase in pressure inside the regenerator, a pressure rise prevention means of any one of a safety valve, a rupture disk and a rupture disk is provided in the high temperature regenerator or the refrigerant vapor pipe from the high temperature regenerator. In a multi-effect absorption refrigerator / chiller / heater with the air outlet open to the atmosphere, when the pressure inside the high-temperature regenerator rises during operation and the pressure rise prevention means is activated, the vacuum is always maintained during operation. Designed to be In order to release the high-pressure side refrigerant vapor and absorption liquid to the low-pressure part of a low-temperature regenerator, etc., to prevent the air from being released to the atmosphere and to speed up the recovery after confirming the safety, the outlet of the pressure rise prevention means is relieved of pressure. A pressure relief pipe from the high-pressure side is connected to the low-pressure part via the pipe so that temperature change or pressure change can be sensed when the high-pressure side pressure rise prevention means is activated and refrigerant vapor and absorption liquid flow out. A temperature measuring device or a pressure measuring device is provided in the system, and further, the supply of the heating heat source to the high temperature regenerator is stopped by the detected temperature change or pressure change, and the stop operation is started, and an abnormality can be notified to the outside. The temperature measuring device or pressure measuring device is electrically connected to the safety control / monitoring device (see FIGS. 8 and 10).
[0012]
In the above-described absorption refrigerator / cooling / heating machine, when a medium temperature heat exchanger and a medium temperature regenerator are provided, a safety valve is used as a pressure rise prevention means on the high pressure side, and a rupture disk (or rupture disk) is used as the pressure rise prevention means on the medium pressure side. It is desirable to use (see FIGS. 3 to 6).
As a heating heat source of the high-temperature regenerator, combustion heat of a fuel combustion device, steam (steam), combustion exhaust gas generated from a heat engine such as a gas engine, a gas turbine, or the like can be used.
Further, instead of providing a high-temperature regenerator, a structure in which a once-through boiler or the like is provided may be employed.
[0013]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, the embodiment of the present invention will be described in the case of an absorption refrigerator, but the present invention is not limited to the case of an absorption refrigerator, and can also be applied to an absorption chiller / heater.
FIG. 1 shows a double-effect absorption refrigerator equipped with a safety device according to a first embodiment of the present invention. As shown in FIG. 1, an evaporator 10, an absorber 12, a condenser 14, a low temperature regenerator 16, a high temperature having a combustion device 17 for directly combusting a fuel such as gas or oil to heat and concentrate the absorbing liquid. A double-effect absorption refrigerator is configured with the regenerator 18, the low-temperature heat exchanger 20, the high-temperature heat exchanger 22, the solution circulation pump, and solution piping, refrigerant piping, and the like connecting these devices.
[0014]
Connected to the refrigerant vapor pipe 24 from the high-temperature regenerator 18 is a pressure rise prevention means 26 (a safety valve is shown as an example in FIG. 1), such as a safety valve, a rupture disk, and a rupture disk. The air outlet 28 of the safety valve 26 is connected to the low temperature regenerator 16 via the pressure relief pipe 30.
[0015]
In the double-effect absorption refrigerator configured as described above, the absorption liquid (rare liquid, for example, lithium bromide aqueous solution) in the absorber 12 is transferred to the low temperature heat exchanger 20 and the high temperature heat exchange by a solution pump (low temperature pump) 32. It is sent to the high-temperature regenerator 18 through the vessel 22 to burn the fuel in the combustion device 17, and the absorbing liquid is heated and concentrated by the generated combustion gas. As a heating heat source for the high-temperature regenerator 18, it is also possible to use exhaust gas from a heat engine such as steam, a gas engine, or a gas turbine instead of providing a combustion device and using the combustion heat of the fuel. is there.
[0016]
The absorbing liquid from the high temperature regenerator 18 is sent to the low temperature regenerator 16 through the high temperature heat exchanger 22 where it is heated and concentrated by refrigerant vapor (for example, water vapor) from the high temperature regenerator 18. Next, the absorption liquid from the low-temperature regenerator 16 is sent to the low-temperature heat exchanger 20 and then introduced into the absorber 12, where it is indirectly cooled with cooling water, and the refrigerant liquid (for example, water) from the evaporator 10 is also cooled. ) To form a dilute solution.
On the other hand, the refrigerant vapor from the high-temperature regenerator 18 enters the low-temperature regenerator 16, where the refrigerant vapor is condensed and liquefied by heating the absorption liquid and enters the condenser 14. After the refrigerant vapor generated when the absorbing liquid is concentrated in the low temperature regenerator 16 enters the condenser 14 and is indirectly cooled and condensed by the cooling water, the refrigerant liquid (for example, water) enters the evaporator 10, The condensed refrigerant water is sprayed on the heat transfer pipe (water is circulating) of the evaporator 10 by the refrigerant pump 34 to obtain cold water.
[0017]
Even when the pressure inside the high-temperature regenerator 18 rises during operation and the safety valve 26 is activated, the refrigerant vapor from the high-temperature regenerator 18 is transferred to the low-temperature regenerator 16 that is designed to be substantially vacuum during operation. In addition, since the absorbing liquid is released, safety is ensured, release to the atmosphere is prevented, and recovery after safety confirmation can be performed quickly and easily.
Note that the low pressure section such as the low temperature regenerator 16 is always kept at a high vacuum by a vacuum pump, an automatic bleed device or the like in order to maintain the performance during the cooling operation. Further, during the stop, the high temperature regenerator 18 is not heated, and the safety valve 26 does not operate because the low pressure side and the high temperature side have the same pressure and are substantially vacuum.
In the present embodiment, the safety device includes a safety valve 26, a pressure relief pipe 30 that connects a safety valve outlet 28 and a low pressure part such as the low temperature regenerator 16.
[0018]
The above is a description of a series flow type double-effect absorption refrigerator that is connected and arranged so that the absorbing liquid is pumped from the absorber 12 to the high-temperature regenerator 18 and then flows to the low-temperature regenerator 16. Is a reverse flow type double-effect absorption refrigerator that is pumped from the absorber to the low-temperature regenerator and then pumped to the high-temperature regenerator, and the absorption liquid is absorbed from the absorber to the high-temperature regenerator and low-temperature regenerator It is of course possible to apply to a parallel flow type double-effect absorption refrigerator that is connected and arranged so that it can be pumped simultaneously.
Of course, it is also possible to apply to an absorption cold / hot water machine instead of an absorption refrigerator. In this case, a cooling / heating switching valve (not shown) is provided between the refrigerant pipe of the low-temperature regenerator and the evaporator, the cooling / heating switching valve is closed during cold water operation, and the cooling / heating switching valve is opened during hot water operation. Stop supplying cooling water to the condenser and condenser. It is also possible to use a once-through boiler instead of the high temperature regenerator.
[0019]
FIG. 2 shows a double-effect absorption refrigerator equipped with a safety device according to the second embodiment of the present invention. In the present embodiment, a temperature measuring device, for example, a temperature sensor, or a pressure measuring device, for example, a pressure sensor is provided in a pressure relief pipe 30 that connects a pressure increase prevention means on the high pressure side, for example, the outlet 28 of the safety valve 26 and the low pressure portion. The temperature when the temperature sensor or pressure sensor 36 is electrically connected to an external (external) safety control / monitoring device 38 and the high-pressure side safety valve 26 is activated to discharge the refrigerant vapor and the absorption liquid. By detecting a change or a pressure change and sending a detection signal, an electric safety circuit is assembled so as to stop the combustion in the high temperature regenerator 18 or stop the supply of the heating heat source and enter the stop operation. It is configured to be able to notify the outside of the abnormality.
In this embodiment, when the pressure in the high-temperature regenerator 18 rises and the safety valve 26 is activated, the outlet 28 is connected to the low pressure side via the pressure relief pipe 30 to release the pressure and ensure safety at the same time. It is possible to prevent the air from being released to the atmosphere and to make the recovery after the safety confirmation quick and easy. At the same time, the safety stop operation can be started to notify the outside of the abnormality.
In the present embodiment, the safety device includes a safety valve 26, a pressure relief pipe 30 that connects the outlet 28 of the safety valve and a low pressure part such as the low temperature regenerator 16, a temperature sensor or pressure sensor 36, and the temperature sensor or pressure sensor 36. It is comprised by the safety control and monitoring apparatus 38 connected to. Other configurations and operations are the same as those in the first embodiment.
[0020]
FIG. 3 shows a multi-effect absorption refrigerator equipped with a safety device according to a third embodiment of the present invention. FIG. 3 shows an example of a triple effect absorption refrigerator. As shown in FIG. 3, the evaporator 10, the absorber 12, the condenser 14, the low temperature regenerator 16, the medium temperature regenerator 40, and the combustion for directly burning the fuel such as gas or oil to heat and concentrate the absorption liquid. The triple effect is composed of the high-temperature regenerator 18 having the device 17, the low-temperature heat exchanger 20, the intermediate-temperature heat exchanger 42, the high-temperature heat exchanger 22, the solution circulation pump, and the solution pipe and the refrigerant pipe connecting these devices. An absorption refrigerator is configured.
[0021]
Connected to the refrigerant vapor pipe 24 from the high-temperature regenerator 18 is a pressure rise prevention means 26 such as a safety valve, a rupture disk, a rupture disk, etc. (in FIG. 3, a safety valve is shown as an example. The outlet 28 of the safety valve 26 is connected to the intermediate temperature regenerator 40 via the pressure relief pipe 30.
In the refrigerant vapor pipe 44 from the intermediate temperature regenerator 40, a pressure rise prevention means 46 such as a rupture disk, a rupture disk, a safety valve, etc. (in FIG. 3, a rupture disk is shown as an example. ), And the outlet 48 of the rupture disk 46 is connected to the low temperature regenerator 16 via the pressure relief pipe 50.
[0022]
In the triple effect absorption refrigerator configured as described above, the absorption liquid (dilute liquid, for example, lithium bromide aqueous solution) in the absorber 12 is cooled by the solution pump (low temperature pump) 32 at the low temperature heat exchanger 20 and the intermediate temperature heat exchanger. 42 and the high-temperature heat exchanger 22 are sent to the high-temperature regenerator 18, the fuel is combusted by the combustion device 17, and the absorbed liquid is heated and concentrated by the generated combustion gas. As a heating heat source for the high-temperature regenerator 18, it is also possible to use exhaust gas from a heat engine such as steam, a gas engine, or a gas turbine instead of providing a combustion device and using the combustion heat of the fuel. is there.
[0023]
The absorbing liquid from the high temperature regenerator 18 is sent to the intermediate temperature regenerator 40 through the high temperature heat exchanger 22 where it is heated and concentrated by the refrigerant vapor (for example, water vapor) from the high temperature regenerator 18. Next, the absorption liquid from the intermediate temperature regenerator 40 is sent to the intermediate temperature heat exchanger 42 and then introduced into the low temperature regenerator 16 where it is heated and concentrated by the refrigerant vapor from the intermediate temperature regenerator 40. The absorbent from the low-temperature regenerator 16 is sent to the low-temperature heat exchanger 20 and then introduced into the absorber 12, where it is indirectly cooled by cooling water, and the refrigerant liquid (for example, water) from the evaporator 10 Mix to become a dilute solution.
[0024]
On the other hand, the refrigerant vapor from the high-temperature regenerator 18 enters the intermediate-temperature regenerator 40, and the refrigerant vapor partially condenses and liquefies by heating the absorption liquid here and enters the low-temperature regenerator 16. The refrigerant vapor generated when the absorbing liquid is concentrated in the intermediate temperature regenerator 40 is introduced into the low temperature regenerator 16 through the refrigerant vapor pipe 44.
After the refrigerant vapor generated when the absorbing liquid is concentrated in the low temperature regenerator 16 enters the condenser 14 and is indirectly cooled and condensed by the cooling water, the refrigerant liquid (for example, water) enters the evaporator 10, The condensed refrigerant water is sprayed on the heat transfer pipe (water is circulating) of the evaporator 10 by the refrigerant pump 34 to obtain cold water.
[0025]
Even when the pressure inside the high-temperature regenerator 18 rises during operation and the safety valve 26 operates, the refrigerant vapor from the high-temperature regenerator 18 is transferred to the intermediate-temperature regenerator 40 that is designed to be substantially vacuum during operation. In addition, since the absorbing liquid is released, safety is ensured, release to the atmosphere is prevented, and recovery after safety confirmation can be performed quickly and easily.
Similarly, even when the pressure inside the intermediate temperature regenerator 40 rises during operation and the rupture disk 46 is activated, the medium temperature regeneration is performed to the low temperature regenerator 16 that is designed to be substantially vacuum during operation. Since the refrigerant vapor and the absorbing liquid are discharged from the container 40, safety is ensured, the opening to the atmosphere is prevented, and the recovery after the safety check can be performed quickly and easily.
In this way, by connecting the outlets of the safety valve 26 and the rupture disk 46 sequentially to the low pressure side via the pressure relief pipe and releasing the pressure, the internal volume can be effectively used for decompression. Also, depending on each pressure level, it is desirable to make use of the respective features, such as a safety valve on the high pressure side and a rupture disk on the low pressure side.
[0026]
Note that the low pressure section such as the low temperature regenerator 16 is always kept at a high vacuum by a vacuum pump, an automatic bleed device or the like in order to maintain the performance during the cooling operation. Further, during the stop, the high temperature regenerator 18 is not heated, and the safety valve 26 does not operate because the low pressure side and the high temperature side have the same pressure and are substantially vacuum.
In this embodiment, the safety device includes a safety valve 26, a pressure relief pipe 30 connecting the safety valve outlet 28 and the intermediate temperature regenerator 40, a rupture disk 46, a rupture disk outlet 48 and the low temperature regenerator 16. It is constituted by a pressure relief pipe 50 connecting the parts.
[0027]
The above is a description of a series flow type triple effect absorption refrigerator in which the absorption liquid is pumped from the absorber 12 to the high temperature regenerator 18 and then connected and arranged to flow to the low temperature regenerator 16 via the intermediate temperature regenerator 40. However, the absorption liquid is pumped from the absorber to the low-temperature regenerator, connected and arranged so that it is pumped to the high-temperature regenerator through the medium-temperature regenerator, and the absorption liquid is absorbed by the reverse flow type triple effect absorption refrigerator. Of course, it is also possible to apply to a parallel flow type triple effect absorption refrigerator that is connected and arranged so as to be pumped from the regenerator to the high temperature regenerator, the medium temperature regenerator, and the low temperature regenerator at the same time. It is also possible to apply to a multi-effect absorption refrigerator having a quadruple effect or higher.
Of course, it is also possible to apply to an absorption cold / hot water machine instead of an absorption refrigerator. In this case, a cooling / heating switching valve (not shown) is provided between the refrigerant pipe of the low-temperature regenerator and / or the intermediate-temperature regenerator and the evaporator, the cooling / heating switching valve is closed during cold water operation, and cooling / heating switching is performed during hot water operation. Open the valve and stop the supply of cooling water to the absorber and condenser. It is also possible to use a once-through boiler instead of the high temperature regenerator.
[0028]
FIG. 4 shows a triple effect absorption refrigerator equipped with a safety device according to a fourth embodiment of the present invention. In the present embodiment, a temperature measuring device, for example, a temperature sensor, or a pressure measuring device, for example, a pressure sensor is provided in a pressure relief pipe 30 that connects a pressure increase prevention means on the high pressure side, for example, the outlet 28 of the safety valve 26 and the low pressure portion. The temperature when the temperature sensor or pressure sensor 36 is electrically connected to an external (external) safety control / monitoring device 38 and the high-pressure side safety valve 26 is activated to discharge the refrigerant vapor and the absorption liquid. By detecting a change or a pressure change and sending a detection signal, an electric safety circuit is assembled so as to stop the combustion in the high temperature regenerator 18 or stop the supply of the heating heat source and enter the stop operation. It is configured to be able to notify the outside of the abnormality.
In this embodiment, when the pressure in the high-temperature regenerator 18 rises and the safety valve 26 is activated, the outlet 28 is connected to the low pressure side via the pressure relief pipe 30 to release the pressure and ensure safety at the same time. It is possible to prevent the air from being released to the atmosphere and to make the recovery after the safety confirmation quick and easy. At the same time, the safety stop operation can be started to notify the outside of the abnormality.
In the present embodiment, the safety device is connected to the safety valve 26, the pressure relief pipe 30 that connects the outlet 28 of the safety valve and the intermediate temperature regenerator 40, the temperature sensor or pressure sensor 36, and the temperature sensor or pressure sensor 36. It comprises a safety control / monitoring device 38, a rupture disk 46, and a pressure relief pipe 50 that connects the rupture disk outlet 48 and a low pressure part such as the low temperature regenerator 16. Other configurations and operations are the same as those in the third embodiment.
[0029]
FIG. 5 shows a triple effect absorption refrigerator equipped with a safety device according to a fifth embodiment of the present invention. In the present embodiment, the absorption liquid from the absorber 12 is pumped to the low temperature regenerator 16, then supplied to the intermediate temperature regenerator 40 by the solution pump 52, and further supplied to the high temperature regenerator 18 by the solution pump 54. As described above, the present invention is applied to a reverse flow type absorption refrigerator in which devices and pipes are arranged and connected. Other configurations and operations are the same as those in the third embodiment.
[0030]
FIG. 6 shows a triple effect absorption refrigerator equipped with a safety device according to a sixth embodiment of the present invention. In the present embodiment, the absorption liquid from the absorber 12 is pumped to the low temperature regenerator 16, then supplied to the intermediate temperature regenerator 40 by the solution pump 52, and further supplied to the high temperature regenerator 18 by the solution pump 54. As described above, the present invention is applied to a reverse flow type absorption refrigerator in which devices and pipes are arranged and connected. Other configurations and operations are the same as those in the fourth embodiment.
[0031]
FIG. 7 shows a triple effect absorption refrigerator equipped with a safety device according to a seventh embodiment of the present invention. In the present embodiment, the intermediate temperature regenerator 40 is configured such that the pressure relief pipe 30a from the high temperature regenerator 18 of the multi-effect, for example, triple effect type absorption refrigerator or cold / hot water machine is directly connected to the low pressure part such as the low temperature regenerator 16. The pressure relief pipe from the pipe is configured to be omitted. Other configurations and operations are the same as those in the third embodiment.
[0032]
FIG. 8 shows a triple effect absorption refrigerator equipped with a safety device according to an eighth embodiment of the present invention. In the present embodiment, the intermediate temperature regenerator 40 is configured such that the pressure relief pipe 30a from the high temperature regenerator 18 of the multi-effect, for example, triple effect type absorption refrigerator or cold / hot water machine is directly connected to the low pressure part such as the low temperature regenerator 16. The pressure relief pipe from the pipe is configured to be omitted. Other configurations and operations are the same as those in the fourth embodiment.
[0033]
FIG. 9 shows a triple effect absorption refrigerator equipped with a safety device according to a ninth embodiment of the present invention. In the present embodiment, the intermediate temperature regenerator 40 is configured such that the pressure relief pipe 30a from the high temperature regenerator 18 of the multi-effect, for example, triple effect type absorption refrigerator or cold / hot water machine is directly connected to the low pressure part such as the low temperature regenerator 16. The pressure relief pipe from the pipe is configured to be omitted. Other configurations and operations are the same as those in the fifth embodiment.
[0034]
FIG. 10 shows a triple effect absorption refrigerator equipped with a safety device according to a tenth embodiment of the present invention. In the present embodiment, the intermediate temperature regenerator 40 is configured such that the pressure relief pipe 30a from the high temperature regenerator 18 of the multi-effect, for example, triple effect type absorption refrigerator or cold / hot water machine is directly connected to the low pressure part such as the low temperature regenerator 16. The pressure relief pipe from the pipe is configured to be omitted. Other configurations and operations are the same as those in the sixth embodiment.
[0035]
【The invention's effect】
Since this invention is comprised as mentioned above, there exist the following effects.
(1) Since the outlet of the pressure rise prevention means such as the high pressure side safety valve, rupture disk, rupture disc, etc. is connected to the low pressure side so as not to open to the atmosphere. Safety valve etc. Even when the pressure rise prevention means is activated, reduced pressure is maintained, safety can be ensured, and adverse effects such as corrosion on the machine are eliminated, and Safety valve etc. Recovery after the pressure rise prevention means is activated can be performed quickly and easily.
(2) High pressure side Safety valve etc. When a temperature measuring device or a pressure measuring device is provided in the pressure relief pipe from the pressure rise preventing means, and the temperature measuring device or the pressure measuring device is connected to the safety control / monitoring device, the effect of (1) above is achieved. In addition to, Safety valve etc. Detects temperature change or pressure change of refrigerant vapor / absorbed liquid that has flowed out due to operation of pressure rise prevention means, sends detection signal to safety control / monitoring device, stops combustion in high temperature regenerator, or heat source Is stopped and the operation is stopped, and an abnormality can be notified to the outside.
[Brief description of the drawings]
FIG. 1 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a first embodiment of the present invention.
FIG. 2 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a second embodiment of the present invention.
FIG. 3 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a third embodiment of the present invention.
FIG. 4 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a fourth embodiment of the present invention.
FIG. 5 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a fifth embodiment of the present invention.
FIG. 6 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a sixth embodiment of the present invention.
FIG. 7 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a seventh embodiment of the present invention.
FIG. 8 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to an eighth embodiment of the present invention.
FIG. 9 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a ninth embodiment of the present invention.
FIG. 10 is a systematic schematic configuration diagram of an absorption refrigerator equipped with a safety device according to a tenth embodiment of the present invention.
[Explanation of symbols]
10 Evaporator
12 Absorber
14 Condenser
16 Low temperature regenerator
17 Combustion device
18 High temperature regenerator
20 Low temperature heat exchanger
22 High temperature heat exchanger
24, 44 Refrigerant vapor piping
26 Safety valve (pressure rise prevention means)
28, 48 outlet
30, 30a, 50 Pressure relief piping
32, 52, 54 Solution pump
34 Refrigerant pump
36 Temperature sensor or pressure sensor
38 Safety control and monitoring equipment
40 Medium temperature regenerator
42 Medium temperature heat exchanger
46 Rupture disc (pressure rise prevention means)

Claims (1)

吸収器、蒸発器、低温熱交換器、低温再生器、中温熱交換器、中温再生器、高温熱交換器、高温再生器、凝縮器、溶液循環ポンプ、及びこれらの機器を接続する溶液配管、冷媒配管を構成要素とし、高温再生器内部の圧力が大気圧を越えた場合又は設定圧力を越えた場合に、高温再生器内部の圧力の上昇を防止するために、安全弁が高温再生器又は高温再生器からの冷媒蒸気配管に設けられ、この安全弁の吹出し口が大気開放となっている多重効用吸収冷凍機・冷温水機において、
運転中に高温再生器内部の圧力が上昇して安全弁が作動した場合に、運転中は常に略真空になるように設計されている低温再生器などの低圧部へ高圧側の冷媒蒸気及び吸収液を放出して、大気開放を防止し、かつ安全確認後の復旧を早くし、中温再生器からの圧力逃し配管を省略するために、安全弁の吹出し口を圧力逃し配管を介して中温再生器を介することなく低圧部に直接接続するとともに、高圧側の安全弁が作動して冷媒蒸気及び吸収液が流出した際の温度変化又は圧力変化を感知できるように、高圧側からの圧力逃し配管に温度測定装置又は圧力測定装置を設け、さらに、感知した温度変化又は圧力変化により高温再生器への加熱熱源の供給を停止して停止動作に入るとともに、外部へ異常を知らせることができるように、温度測定装置又は圧力測定装置と安全制御・監視装置とを電気的に接続したことを特徴とする安全装置を備えた吸収冷凍機・冷温水機
Absorber, evaporator, low temperature heat exchanger, low temperature regenerator, medium temperature heat exchanger, medium temperature regenerator, high temperature heat exchanger, high temperature regenerator, condenser, solution circulation pump, and solution piping for connecting these devices, In order to prevent the pressure inside the high-temperature regenerator from rising when the pressure inside the high-temperature regenerator exceeds atmospheric pressure or exceeds the set pressure, the safety valve has a high-temperature regenerator or high-temperature regenerator. In the multi-effect absorption refrigerator / cooling / heating machine, which is installed in the refrigerant vapor pipe from the regenerator and the outlet of this safety valve is open to the atmosphere,
When the pressure inside the high-temperature regenerator rises during operation and the safety valve is activated, the refrigerant vapor and absorption liquid on the high-pressure side go to the low-pressure part such as a low-temperature regenerator that is designed to be almost vacuum during operation. In order to prevent the release of air to the atmosphere , speed up recovery after safety confirmation, and omit the pressure relief piping from the intermediate temperature regenerator, connect the outlet of the safety valve to the intermediate temperature regenerator via the pressure relief piping. Temperature measurement on the pressure relief pipe from the high pressure side so that it can be directly connected to the low pressure part without any intervening and the temperature change or pressure change can be sensed when the safety valve on the high pressure side operates and refrigerant vapor and absorption liquid flow out In addition, a temperature measurement is provided so that the supply of the heating heat source to the high-temperature regenerator is stopped by the sensed temperature change or pressure change, and the stop operation is started and an abnormality is notified to the outside.置又the absorption chiller-chiller having a safety device being characterized in that electrically connects the pressure measuring device and the safety control and monitoring system.
JP18111199A 1999-06-28 1999-06-28 Absorption refrigerator / cooling / heating machine with safety device Expired - Lifetime JP3620639B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP18111199A JP3620639B2 (en) 1999-06-28 1999-06-28 Absorption refrigerator / cooling / heating machine with safety device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP18111199A JP3620639B2 (en) 1999-06-28 1999-06-28 Absorption refrigerator / cooling / heating machine with safety device

Publications (2)

Publication Number Publication Date
JP2001012831A JP2001012831A (en) 2001-01-19
JP3620639B2 true JP3620639B2 (en) 2005-02-16

Family

ID=16095048

Family Applications (1)

Application Number Title Priority Date Filing Date
JP18111199A Expired - Lifetime JP3620639B2 (en) 1999-06-28 1999-06-28 Absorption refrigerator / cooling / heating machine with safety device

Country Status (1)

Country Link
JP (1) JP3620639B2 (en)

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE60030984T2 (en) * 2000-11-08 2007-05-31 Kawasaki Thermal Engineering Co. Ltd., Kusatsushi Safety device for absorption chiller or absorption chiller and heater
JP4596683B2 (en) * 2001-06-05 2010-12-08 三洋電機株式会社 Absorption refrigerator
JP4562321B2 (en) * 2001-06-29 2010-10-13 三洋電機株式会社 Absorption refrigerator
CN108375145A (en) * 2018-01-26 2018-08-07 青岛海尔空调电子有限公司 A kind of heat pump system and its defrosting control method

Also Published As

Publication number Publication date
JP2001012831A (en) 2001-01-19

Similar Documents

Publication Publication Date Title
JP2007518058A (en) Absorption chiller with evaporator protection
US6550272B2 (en) Absorption chiller/absorption chiller-heater having safety device
JP3620639B2 (en) Absorption refrigerator / cooling / heating machine with safety device
JP3585892B2 (en) Triple effect absorption chiller / heater with safety confirmation function
EP1205718B1 (en) Absorption chiller/absorption chiller-heater having safety device
JPS62271922A (en) Exhaust heat recovery device for internal combustion engine
CN101713601B (en) Absorption type heat pump
JP2006162104A (en) Triple effect type absorption cooling and heating machine control method having exhaust heat regenerator and triple effect type absorption cooling and heating machine
JP4090262B2 (en) Absorption refrigerator
JP3731132B2 (en) Absorption refrigerator crystallization prevention method
JP3585890B2 (en) Heating operation control method of triple effect absorption chiller / heater
JP4632633B2 (en) Absorption heat pump device
JP7225182B2 (en) Absorption chiller control system and absorption chiller
JP5967407B2 (en) Absorption type water heater
JP3081472B2 (en) Control method of absorption refrigerator
JP3969527B2 (en) Safety method for flue gas charging type absorption chiller / heater
JP3945955B2 (en) Absorption refrigerator
JP4562323B2 (en) Absorption refrigerator
JP4128068B2 (en) Absorption refrigerator
JP2005300069A (en) Absorption refrigerating machine
JPH03194368A (en) Method and apparatus for controlling operation of absorption type water cooling and heating machine
JP2771597B2 (en) Automatic bleeding device for absorption refrigerator
JP3429904B2 (en) Absorption refrigerator
KR101162877B1 (en) Purge unit of absorption chiller and heater with cooling system
JP2000130893A (en) Operating method for absorption hot and chilled water generator

Legal Events

Date Code Title Description
A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20040929

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20041110

R150 Certificate of patent or registration of utility model

Free format text: JAPANESE INTERMEDIATE CODE: R150

Ref document number: 3620639

Country of ref document: JP

Free format text: JAPANESE INTERMEDIATE CODE: R150

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20071126

Year of fee payment: 3

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081126

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20081126

Year of fee payment: 4

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091126

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20091126

Year of fee payment: 5

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101126

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20101126

Year of fee payment: 6

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111126

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20111126

Year of fee payment: 7

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20121126

Year of fee payment: 8

FPAY Renewal fee payment (event date is renewal date of database)

Free format text: PAYMENT UNTIL: 20131126

Year of fee payment: 9

EXPY Cancellation because of completion of term