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31. 发明专利

JP2003028508A Heating apparatus 有权
标题翻译：加热装置
公开(公告)号：JP2003028508A
公开(公告)日：2003-01-29
申请号：JP2001216103
申请日：2001-07-17
申请人： Harman Kikaku:Kk , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , Tokyo Gas Co Ltd , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ハーマン企画 , 西部瓦斯株式会社
发明人： SUZUKI KIWAMU , TANOGASHIRA KENICHI , YAMAGUCHI KAZUYA , KASHIWABARA YOSHITAKA , IWATA SHIN , TAKIMOTO KEIJI , TAKAGI HIROSHI , MATSUMOTO KAZUHIRO , HASHIZUME YASUTO , KAWACHI TOSHIHIRO , FUJIKAWA YASUSHI , FUJIMOTO YOSHIO , SAKIISHI TOMOYA
IPC分类号： F24H1/00 , F24H1/18 , F25B27/02
CPC分类号： Y02A30/274
摘要： PROBLEM TO BE SOLVED: To heat an object fluid to be heated to a target heating temperature, and prevent a returned hot medium from a heat exchange type heating section from being supercooled. SOLUTION: A heating apparatus is adapted such that operation control means G estimates third set temperature capable of heating an object fluid to be heated to a target heating temperature in the state where different heat exchange characteristics are considered in response to a relationship among first set temperature, and second set temperature where the object fluid can be heated to the target heating temperature and is capable of keeping the return hot medium temperature from a heat exchange heating section 19 beyond supercooling set temperature, and preheating temperature of the object temperature, and target heating temperature, and when detected temperature by forward hot medium temperature detection means 22 is beyond the first set temperature, second set temperature, and third set temperature, judges that heating allowable conditions are satisfied, and allows the supply of a hot medium to the heat exchange heating section 19, and further estimates the third set temperature when the detected temperature by the forward hot medium temperature detection means 22 is beyond the first set temperature and the second set temperature.
摘要翻译：要解决的问题：将待加热的物体加热到目标加热温度，并且防止从热交换型加热部返回的热介质过冷。解决方案：加热装置适于使得操作控制装置G估计在能够响应于第一设定温度之间的关系考虑不同热交换特性的状态下能够将要加热的物体流体加热到目标加热温度的第三设定温度以及第二设定温度，其中对象流体可以被加热到目标加热温度，并且能够将来自热交换加热部分19的返回热介质温度保持超过过冷却设定温度，以及目标温度的预热温度温度，当通过正向热介质温度检测装置22的检测温度超过第一设定温度，第二设定温度和第三设定温度时，判断为满足加热容许条件，并且允许向热交换器供应热介质加热部分19，并进一步估计第三设定温度在正向热介质温度检测装置22的检测温度超过第一设定温度和第二设定温度。

32. 发明专利

JP2003028506A Regenerative hot water heating apparatus 有权
标题翻译：再生热水加热装置
公开(公告)号：JP2003028506A
公开(公告)日：2003-01-29
申请号：JP2001216102
申请日：2001-07-17
申请人： Harman Kikaku:Kk , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , Tokyo Gas Co Ltd , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ハーマン企画 , 西部瓦斯株式会社
发明人： SUZUKI KIWAMU , TANOGASHIRA KENICHI , YAMAGUCHI KAZUYA , KASHIWABARA YOSHITAKA , IWATA SHIN , TAKIMOTO KEIJI , TAKAGI HIROSHI , MATSUMOTO KAZUHIRO , HASHIZUME YASUTO , KAWACHI TOSHIHIRO , FUJIKAWA YASUSHI , FUJIMOTO YOSHIO , SAKIISHI TOMOYA
IPC分类号： F24H1/18
摘要： PROBLEM TO BE SOLVED: To improve the efficiency of an apparatus by supplying much hot water stored in a regenerative hot water tank to the utmost while preventing hot water from being exhausted.
SOLUTION: Operation control means G, when supplying hot water in a regenerative hot water tank 1 controls the present amount of hot water stored in the regenerative hot water tank 1 less than the minimum amount of detected stored hot water based upon the amount of hot water stored in the regenerative hot water tank to which a large amount of the minimum detected stored hot water to which the hot water stored in the hot water tank 1 is supplied from a timing of the minimum detection where the amount of stored in the regenerative hot water tank 1 is the minimum amount of the detected hot water larger than the minimum secured amount. The operation control means G, when the present amount of stored hot water reaches less than the minimum secured amount, executes a judgement processing which judges heating conditions being satisfied, and once the heating conditions are satisfied, heats hot water circulated with hot water circulation means E to hot water at hot water storage set temperature in heating means 4, and stores the hot water in the hot water regenerative hot water tank 1 in the state where a temperature forming layer is formed, and further supplies the hot water stored in the regenerative hot water tank 1 through the hot water supply passage.
COPYRIGHT: (C)2003,JPO
摘要翻译：要解决的问题：为了提高设备的效率，通过在防止热水被排出的同时最大限度地供给储存在蓄热式热水箱中的大量热水。解决方案：操作控制装置G在再生热水箱1中供应热水时，基于热水量控制存储在蓄热式热水箱1中的热量低于检测到的最低储存热水量的当前量存储在蓄热式热水箱中，从存储在再生式热水中的最小检测量的时刻到供给存储在热水箱1中的热水的最少检测到的存储热量的大量的蓄热式热水箱罐1是检测到的热水的最小量大于最小固定量。操作控制装置G当存储的热水量达到小于最小固定量时，执行判断加热条件满足的判断处理，一旦满足加热条件，就加热热水循环装置 E以加热装置4的热水储存设定温度为热水，在形成有温度形成层的状态下将热水储存在热水再生热水箱1中，进一步供给再生热水箱1通过热水供应通道。

33. 发明专利

JP2003074969A Hot-water storage type hot-water supplier 有权
标题翻译：热水储存型热水供应商
公开(公告)号：JP2003074969A
公开(公告)日：2003-03-12
申请号：JP2001262856
申请日：2001-08-31
申请人： Harman Kikaku:Kk , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , Tokyo Gas Co Ltd , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ハーマン企画 , 西部瓦斯株式会社
发明人： SUZUKI KIWAMU , TANOGASHIRA KENICHI , YAMAGUCHI KAZUYA , KASHIWABARA YOSHITAKA , IWATA SHIN , TAKIMOTO KEIJI , TAKAGI HIROSHI , MATSUMOTO KAZUHIRO , HASHIZUME YASUTO , KAWACHI TOSHIHIRO , FUJIKAWA YASUSHI , FUJIMOTO YOSHIO , SAKIISHI TOMOYA
IPC分类号： F24H1/00 , F24H1/18
摘要： PROBLEM TO BE SOLVED: To improve the efficiency of a device by a method wherein the storage amount of hot-water in a hot-water storage tank will not become short with respect to an amount required actually and an excessive hot-water storage is prevented. SOLUTION: An operation control means H carries out remaining hot-water judging treatment based on the detecting information of remaining hot-water detecting means 25, 26. When the remaining hot-water does not exist, ordinary hot-water storage treatment for starting the operation of a heating means 3 is carried out at the ordinary operation starting time so that the hot-water storage amount in the tank 1 will become a set hot-water filling amount at the set time of hot-water filling. When the remaining hot-water exists, a necessary hot-water filling amount, smaller than the set hot-water filling amount, is obtained based on the detecting information of the remaining hot-water detecting means 25, 26 and the remaining hot-water storage treatment for starting the operation of the heating means 3 is carried out at the remaining hot-water operation starting time so that the hot-water storage amount in the tank 1 will become the necessary hot-water filling amount at the set time of hot-water filling.
摘要翻译：要解决的问题：通过一种方法来提高装置的效率，其中热水储存箱中的热水的储存量相对于实际需要的量不会变短，并且防止了过多的热水储存。解决方案：操作控制装置H基于剩余热水检测装置25,26的检测信息进行剩余的热水判断处理。当不存在剩余的热水时，通常的热水储存处理在通常的运转开始时刻进行加热装置3的运转，使得罐1中的热水储存量在热水灌装的设定时刻成为设定的热水填充量。当剩余热水存在时，基于剩余的热水检测装置25,26的检测信息和剩余的热水获得比设定的热水填充量小的必要的热水填充量在其余热水运转开始时刻进行开始加热装置3的运转的储存处理，使得罐1中的热水储存量在热定型时刻成为必要的热水填充量 - 灌水。

34. 发明专利

JP2003028505A Hot water storage type water heater 有权
标题翻译：热水储水式加热器
公开(公告)号：JP2003028505A
公开(公告)日：2003-01-29
申请号：JP2001216105
申请日：2001-07-17
申请人： Harman Kikaku:Kk , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , Tokyo Gas Co Ltd , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ハーマン企画 , 西部瓦斯株式会社
发明人： SAKAI HISASHIGE , HASHIZUME YASUTO , KAWACHI TOSHIHIRO , FUJIKAWA YASUSHI , FUJIMOTO YOSHIO , SAKIISHI TOMOYA , YAMAGUCHI KAZUYA , TANOGASHIRA KENICHI , ITO MIKIO , ICHIKAWA IKUHIDE
IPC分类号： F24H1/18
摘要： PROBLEM TO BE SOLVED: To prevent a user from feeling uncomfortable by preventing a hot water supply capability from rapidly changing. SOLUTION: An ordinary hot water supply capability in an ordinary hot water supply state is set larger than an auxiliary hot water supply capability in an auxiliary hot water supply state, and hot water supply control means H is switchable between the ordinary hot water supply state where hot water taken out from a hot water regenerative tank 1 is supplied to a hot water supply passage 5 and the auxiliary hot water supply state where hot water heated in heating means 3 is supplied to the hot water supply passage 5. Further, when the amount of stored hot water in the hot water regenerative tank 1 is more than the minimum kept amount, the operation is switched to the ordinary hot water supply state, while when the amount of hot water is less than the minimum kept amount, the operation is switched to the auxiliary hot water supply state. When the operation is switched from the ordinary hot water supply state to the auxiliary hot water supply state, in the ordinary hot water supply state the hot water supply capability is continuously reduced toward the auxiliary hot water supply capability from the ordinary hot water supply capability, and then the operation is switched to the auxiliary hot water supply state. Hereby, a hot water supply capability adjustment processing is executed for switching the operation to the auxiliary hot water supply state.
摘要翻译：要解决的问题：通过防止热水供应能力快速变化来防止用户感到不适。解决方案：普通热水供应状态下的普通热水供应能力设定为大于辅助热水供应状态下的辅助热水供应能力，热水供应控制装置H可在普通热水供应状态之间切换，将从热水再生罐1取出的热水供给到热水供给路5，在供热装置3中加热的热水供给至热水供给路5的辅助热水供给状态。此外，在热水再生罐1中储存的热水大于最小保持量时，操作切换到普通的热水供给状态，而当热水量小于最小保持量时，切换操作到辅助热水供应状态。当操作从普通热水供应状态切换到辅助热水供应状态时，在通常的热水供应状态下，热水供应能力从普通热水供应能力向辅助热水供应能力持续降低，然后将操作切换到辅助热水供应状态。因此，执行热水供应能力调整处理以将操作切换到辅助热水供应状态。

35. 发明专利

JP2003028504A Hot water storage type water heater 有权
标题翻译：热水储水式加热器
公开(公告)号：JP2003028504A
公开(公告)日：2003-01-29
申请号：JP2001216104
申请日：2001-07-17
申请人： Harman Kikaku:Kk , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , Tokyo Gas Co Ltd , 大阪瓦斯株式会社 , 東京瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ハーマン企画 , 西部瓦斯株式会社
发明人： SUZUKI KIWAMU , TANOGASHIRA KENICHI , YAMAGUCHI KAZUYA , KASHIWABARA YOSHITAKA , IWATA SHIN , TAKIMOTO KEIJI , TAKAGI HIROSHI , MATSUMOTO KAZUHIRO , HASHIZUME YASUTO , KAWACHI TOSHIHIRO , FUJIKAWA YASUSHI , FUJIMOTO YOSHIO , SAKIISHI TOMOYA
IPC分类号： F24H1/18
摘要： PROBLEM TO BE SOLVED: To reduce the cost and improve the efficiency of an apparatus by supplying hot water at hot water heating target temperature while effectively utilizing hot water stored in a hot water storage tank. SOLUTION: Hot water heating means G is provided for supplying hot water at hot water supply target temperature by mixing water with hot water from a hot water storage tank 1 supplied through a hot water supply passage 6. Operation control means C executes an ordinary hot water supply processing for controlling the hot water supply means G such that water is mixed with hot water from the hot water regenerative tank 1 supplied through the hot water supply passage 6 to supply hot water when hot water supplied from the hot water regenerative tank 1 to the hot water supply passage 6 exceeds heating starting temperature defined taking the hot water supply target temperature as a reference. It further executes a mixing hot water supply processing for mixing hot water derived from an upper portion in the hot water regenerative tank 1 with hot water heated in the heating means 4 and supplying it to the hot water supply passage 6 for hot water supply when hot water supplied from the hot water regenerative tank 1 to the hot water supply passage 6 falls within a mixing temperature range between the heating starting temperature and mixing lower limit temperature lower than the former temperature.
摘要翻译：要解决的问题：通过在热水加热目标温度下供应热水来有效利用储存在热水储罐中的热水来降低成本并提高设备的效率。解决方案：提供热水加热装置G，用于通过将水与通过热水供应通道6供应的热水储存箱1的热水混合来供应热水供应目标温度的热水。操作控制装置C执行普通热水用于控制热水供应装置G的供应处理，使得水与来自通过热水供应通道6供应的热水再生罐1的热水混合，以便当从热水再生罐1供应的热水向热水供给通路6超过以热水供给对象温度为基准而定义的加热开始温度。进一步执行混合热水供给处理，用于将来自热水再生罐1中的上部的热水与加热装置4中加热的热水混合，并将其供应到热水供应通道6以供热水供应从热水再生罐1供给到热水供给路6的水落在比上一个温度低的加热开始温度和混合下限温度之间的混合温度范围内。

36. 发明专利

JP2004263905A Heat source control device 有权
公开(公告)号：JP2004263905A
公开(公告)日：2004-09-24
申请号：JP2003053036
申请日：2003-02-28
申请人： Noritz Corp , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , 大阪瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ノーリツ , 西部瓦斯株式会社
发明人： SAKATA TAKESHI , MIYAKE TOMIO , ARAI TATSURO , NAKAJIMA YOSHIHIDE , FUJIMOTO YOSHIO , FUJIKAWA YASUSHI , TANIMURA YOSHITAKA , KAWAMURA KOJI , KAWACHI TOSHIHIRO , SAWADA MUNEHISA , HASHIZUME YASUTO , IWATA SHIN , TAKIMOTO KEIJI , KASHIWABARA YOSHITAKA , KAWAMOTO KAORU , KATAYAMA TOMOHIRO
IPC分类号： F24H1/00 , F24D17/00 , F24F11/02
摘要： PROBLEM TO BE SOLVED: To provide a heat source control device having the high energy efficiency of the whole heat system, and further saving energy by accurately predicting a quantity of heat to be used. SOLUTION: This heat source control device has a heat quantity arithmetic operation means 10 for arithmetically operating a consumption heat quantity Q at a specific interval, a past data arithmetic operation means 11 for calculating past data W by applying a prescribed arithmetic operation on the basis of the consumption heat quantity Q, a past data storage means 12, and a heat quantity predicting means 13 for predicting a required heat quantity on the basis of the past data W, and controls a heat source along a prediction provided by the heat quantity predicting means 13, and also has an arithmetic operation correcting means 11a and a prediction correcting means 13a. The arithmetic operation correcting means 11a and the prediction correcting means 13a correct the arithmetic operation or the prediction on the basis of the comparing result of the consumption heat quantity Q arithmetically operated in the past and the past data previous by a reference period of the consumption heat quantity Q. COPYRIGHT: (C)2004,JPO&NCIPI

37. 发明专利

JP2004125302A Hot water storage type hot water supply and heat source device 有权
标题翻译：热水储存型热水供应和热源设备
公开(公告)号：JP2004125302A
公开(公告)日：2004-04-22
申请号：JP2002291190
申请日：2002-10-03
申请人： Noritz Corp , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , 大阪瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ノーリツ , 西部瓦斯株式会社
发明人： IWATA SHIN , TAKIMOTO KEIJI , YOSHIMURA MASAHIRO , TAKAGI HIROSHI , YOSHIDA SATORU , HASHIZUME YASUTO , FUJIKAWA YASUSHI , KAWAMURA KOJI , KAWACHI TOSHIHIRO , FUJIMOTO YOSHIO , ARAI TATSURO , TANIMURA YOSHITAKA
IPC分类号： F24H1/00 , F24D3/18 , F24H1/18
CPC分类号： Y02B30/12
摘要： PROBLEM TO BE SOLVED: To make hard the lowering of bactericidal effect originally held by hot water. SOLUTION: This hot water storage type hot water supply and heat source device comprises a heating and circulating means A performing a stored hot water circulation operation for returning the hot water to the hot water storage tank 1 after the hot water extracted from the hot water storage tank 1 is heated by a heating means 4 and a heat radiating circulation operation for returning the hot water to the heating means 4 after the hot water heated by the heating means 4 is supplied to a heat radiating heat exchanging part 2 and an operation control means C controlling the operation of the heating and circulating means A so that the hot water storing circulation operation can be performed when the requirements for hot water storing circulation operation are satisfied and the radiating circulation operation can be performed when the requirements for the radiating circulation operation are satisfied. When the requirements for maintenance operation are satisfied, an operation control means C controls the operation of the heating and circulating means A so that a maintenance circulation operation can be performed to circulate hot water through the heat exchanging part 2. COPYRIGHT: (C)2004,JPO
摘要翻译：要解决的问题：努力降低由热水原来保持的杀菌效果。解决方案：该热水储存式热水供应和热源装置包括一个加热循环装置A，该加热循环装置A执行储存的热水循环操作，用于在从热水储存箱1被加热装置4加热，并且在将由加热装置4加热的热水供应到热辐射热交换部件2之后将热水返回到加热装置4的散热循环操作，控制加热循环装置A的运转的运转控制装置C，在满足热水储存循环运转的要求的同时进行热水储存循环运转，并且当辐射要求循环运行得到满足。当满足维护操作的要求时，操作控制装置C控制加热循环装置A的操作，从而可以执行维护循环操作以使热水循环通过热交换部分2。 C）2004，JPO

38. 发明专利

JP2004263898A Heating device and cogeneration system 有权
公开(公告)号：JP2004263898A
公开(公告)日：2004-09-24
申请号：JP2003052903
申请日：2003-02-28
申请人： Noritz Corp , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , 大阪瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ノーリツ , 西部瓦斯株式会社
发明人： MIYAKE TOMIO , SAKATA TAKESHI , KANESHIRO TAKANOBU , OTA HIROSHI , NAKAJIMA YOSHIHIDE , MORIKAWA KENJI , TOUGEDA NAOKI , FUJIMOTO YOSHIO , IWATA SHIN , OCHI MASAHITO
IPC分类号： F24H1/00 , F24D3/00 , F24D3/08 , F24H1/18
摘要： PROBLEM TO BE SOLVED: To provide a heating device capable of stably supplying heat to each heat load even in the simultaneous operation of heat loads different in heat absorption, and to provide a cogeneration system using the heating device. SOLUTION: In this heating device wherein a reheating circulation circuit 36 and a heating circulation circuit 35 are connected to a heat source circulation circuit 32 for circulating hot water heated by a combustor 6 through heat exchangers 42, 43, and the heat exchangers 42, 43 selectively function to supply heat energy to the heat load, a time-sharing operation for alternately performing a reheating single operation and a heating single operation is performed when a temperature of a heat medium flowing in the heating circuit is over a predetermined temperature during the simultaneous operation where both of the heat exchangers 42, 43 function together. COPYRIGHT: (C)2004,JPO&NCIPI

39. 发明专利

JP2004260946A Operation control system 有权
标题翻译：操作控制系统
公开(公告)号：JP2004260946A
公开(公告)日：2004-09-16
申请号：JP2003049850
申请日：2003-02-26
申请人： Noritz Corp , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , 大阪瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ノーリツ , 西部瓦斯株式会社
发明人： MAEDA KAZUSHIGE , YOSHIMURA MASAHIRO , TAKAGI HIROSHI , YOSHIDA SATORU , FUJIMOTO YOSHIO , ARAI TATSURO
IPC分类号： F24F11/02 , F24D3/00 , F24H1/18 , H02J3/00
CPC分类号： Y02E20/14 , Y02P80/15
摘要： PROBLEM TO BE SOLVED: To provide an inexpensive system which can perform proper operation control for the power demand and heat demand of a consumer at the time of power restoration, after power failure. SOLUTION: The operation control system 10 is equipped with an demanded amount of information collecting means 1, which collects data on the amount of power demanded and data on the amount of heat demanded at each specified timing, an operation control means 2 which makes information about operation control to be directed to a cogeneration device 21, referring to the data on the amount of power demand and the data on the amount of heat demand; and a representative data making means 4 which makes the representative data on power demand representing the power demand property and the heat demand property of a consumer, referring to the data on the amount of power demand and the data on the amount of heat demand, and stores them in a nonvolatile memory 5. The operation control means 2 makes information about operation control, referring to the representative data on power demand and the data on heat demand stored in the nonvolatile memory 5, at the point of time of power restoration, after power failure. COPYRIGHT: (C)2004,JPO&NCIPI
摘要翻译：要解决的问题：为了提供廉价的系统，其能够在电力恢复时对停电时的消费者的电力需求和热需求进行适当的操作控制。
解决方案：操作控制系统10配备有需求量的信息收集装置1，其收集关于所需功率的数据和关于每个指定定时所需的热量的数据的数据;操作控制装置2，参考有关电力需求量和热量需求数据的数据，将关于运行控制的信息引导到热电联供装置21; 以及代表数据制作装置4，参照关于电力需求量和热量需求量的数据的数据，作出表示电力需求特性和消费者的热需求特性的电力需求的代表性数据，以及将它们存储在非易失性存储器5中。操作控制装置2在功率恢复的时间点之后，参考电力需求上的代表性数据和存储在非易失性存储器5中的热量需求数据，进行关于操作控制的信息电源（检测）失败。版权所有（C）2004，JPO＆NCIPI

40. 发明专利

JP2004260916A Cogeneration system 有权
公开(公告)号：JP2004260916A
公开(公告)日：2004-09-16
申请号：JP2003048403
申请日：2003-02-26
申请人： Noritz Corp , Osaka Gas Co Ltd , Seibu Gas Co Ltd , Toho Gas Co Ltd , 大阪瓦斯株式会社 , 東邦瓦斯株式会社 , 株式会社ノーリツ , 西部瓦斯株式会社
发明人： FUJIMOTO YOSHIO , TANIMURA YOSHITAKA , KAWAMURA KOJI , KAWACHI TOSHIHIRO , MORIKAWA KENJI , MAEDA KAZUSHIGE , HAYANO AKIHITO , IWATA SHIN , TOMIO TAKESHI , YOSHIMURA MASAHIRO , TAKAGI HIROSHI , YOSHIDA SATORU
IPC分类号： H02J3/38
摘要： PROBLEM TO BE SOLVED: To provide a cogeneration system which can surely block the reverse flow of power and which has excellent stability and general energy efficiency. SOLUTION: A cogeneration system 1 includes a generator 2, a heater 3, and a controller 4 for controlling the power generated by the generator 2 and the power flowing from an external power source 9 into the system in the system. A reverse power relaying unit 11 which can detect the power flowing between the heater 3 or an external load 8 and the external power source 9, is connected to a control means 4. The controller 4 supplies power from the external power source 9 toward the heater 3 if the power W detected by the reverse power relaying unit 11 is a predetermined power X or less, and detects the fault of the reverse power relaying unit 11. COPYRIGHT: (C)2004,JPO&NCIPI

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