JP4760282B2 - Water heater - Google Patents

Water heater Download PDF

Info

Publication number
JP4760282B2
JP4760282B2 JP2005296297A JP2005296297A JP4760282B2 JP 4760282 B2 JP4760282 B2 JP 4760282B2 JP 2005296297 A JP2005296297 A JP 2005296297A JP 2005296297 A JP2005296297 A JP 2005296297A JP 4760282 B2 JP4760282 B2 JP 4760282B2
Authority
JP
Japan
Prior art keywords
hot water
water supply
heat exchanger
water
drainage operation
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 - Fee Related
Application number
JP2005296297A
Other languages
Japanese (ja)
Other versions
JP2007107742A (en
Inventor
寿貴 園田
裕之 舩橋
茂岐 宇野
昌純 岩永
幸一 金崎
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.)
Panasonic Corp
Panasonic Holdings Corp
Original Assignee
Panasonic Corp
Matsushita Electric Industrial 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 Panasonic Corp, Matsushita Electric Industrial Co Ltd filed Critical Panasonic Corp
Priority to JP2005296297A priority Critical patent/JP4760282B2/en
Publication of JP2007107742A publication Critical patent/JP2007107742A/en
Application granted granted Critical
Publication of JP4760282B2 publication Critical patent/JP4760282B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • Y—GENERAL 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
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/18—Domestic hot-water supply systems using recuperated or waste heat

Landscapes

  • Instantaneous Water Boilers, Portable Hot-Water Supply Apparatuses, And Control Of Portable Hot-Water Supply Apparatuses (AREA)
  • Details Of Fluid Heaters (AREA)
  • Steam Or Hot-Water Central Heating Systems (AREA)
  • Domestic Hot-Water Supply Systems And Details Of Heating Systems (AREA)

Description

本発明は、バーナの燃焼熱により加熱する給湯用熱交換器と、燃焼排ガスの潜熱を回収する潜熱回収熱交換器を備えた給湯装置に関し、特に、前記給湯用熱交換器と潜熱回収熱交換器で加熱された湯水を循環する給湯循環回路に利用側熱交換器を設けた給湯装置に関するものである。   The present invention relates to a hot water supply heat exchanger that is heated by combustion heat of a burner, and a hot water supply device that includes a latent heat recovery heat exchanger that recovers latent heat of combustion exhaust gas, and in particular, the hot water supply heat exchanger and latent heat recovery heat exchange. The present invention relates to a hot water supply apparatus in which a use side heat exchanger is provided in a hot water supply circulation circuit for circulating hot water heated by a heater.

従来この種の燃焼装置としては、特許文献１のように、給水路を通して供給される水をバーナの燃焼により加熱して給湯路に給湯する給湯用熱交換器と、入路を通して供給される加熱対象流体を前記バーナの燃焼により加熱して出路に流出する流体用熱交換器とが設けられている給湯装置であって、前記給湯用熱交換器が前記バーナの燃焼排ガスの顕熱を回収する給湯用顕熱熱交換部と、その給湯用顕熱熱交換部よりも前記バーナの燃焼排ガスの流動方向の下流側に配置され、前記バーナの燃焼排ガスの潜熱を回収する給湯用潜熱熱交換部とを備えて構成され、前記流体用熱交換器が、前記バーナの燃焼排ガスの顕熱を回収する流体用顕熱熱交換部と、その流体用顕熱熱交換部よりも前記バーナの燃焼排ガスの流動方向の下流側に配置され、前記バーナの燃焼排ガスの潜熱を回収する流体用潜熱熱交換部とを備えて構成され、前記給湯用顕熱熱交換部と流体用顕熱熱交換部とが、互いに熱伝導する状態で一体的に形成され、かつ、前記給湯用潜熱熱交換部と流体用潜熱熱交換部とが、互いに熱伝導する状態で一体的に形成された給湯装置が開示されている（例えば、特許文献１参照）。
特開２００２−２６７２６２号公報 Conventionally, as this type of combustion apparatus, as disclosed in Patent Document 1, a hot water supply heat exchanger that heats water supplied through a water supply path by combustion of a burner to supply hot water to the hot water supply path, and heating supplied through an inlet path A hot water supply apparatus provided with a fluid heat exchanger that heats a target fluid by combustion of the burner and flows out to an outlet, and the hot water heat exchanger recovers sensible heat of combustion exhaust gas of the burner A sensible heat exchange unit for hot water supply, and a latent heat heat exchange unit for hot water supply that is disposed downstream of the sensible heat exchange unit for hot water supply in the flow direction of the combustion exhaust gas of the burner and recovers the latent heat of the combustion exhaust gas of the burner The fluid heat exchanger recovers sensible heat of the combustion exhaust gas of the burner, and the combustion exhaust gas of the burner than the fluid sensible heat exchange unit. Arranged downstream of the flow direction of And a fluid latent heat exchange part for recovering the latent heat of the combustion exhaust gas of the burner, and the sensible heat exchange part for hot water supply and the sensible heat exchange part for fluid are integrated in a state of conducting heat to each other. And a hot water supply device in which the latent heat heat exchange part for hot water supply and the latent heat heat exchange part for fluid are integrally formed in a state of conducting heat to each other are disclosed (for example, see Patent Document 1). .
JP 2002-267262 A

しかしながら、前記従来の給湯装置は、給湯と暖房バーナの燃焼ガスの流出経路中に給湯用熱交換器と流体用熱交換器をそれぞれ配置し、前記給湯用熱交換器に給湯用顕熱熱交換部と給湯用潜熱熱交換部を設け、前記流体用熱交換器に流体用顕熱熱交換部と流体用潜熱熱交換部を設けた構成としているため、顕熱熱交換部と潜熱熱交換部にそれぞれ給湯用熱交換器と流体用熱交換器を一体的に形成する必要があり、給湯用熱交換器及び流体用熱交換器として極めて複雑な構成を強いられるものであった。特に、潜熱熱交換部の構成として、耐食性を高めるためにステンレスパイプと銅管を用いた２重管構造とする場合などはその加工性に課題を有するものであった。   However, in the conventional hot water supply apparatus, a hot water supply heat exchanger and a fluid heat exchanger are arranged in the outflow path of the combustion gas of the hot water supply and the heating burner, respectively, and sensible heat exchange for hot water supply is performed in the hot water supply heat exchanger. And a latent heat exchange unit for hot water supply, and the fluid heat exchanger is provided with a sensible heat exchange unit for fluid and a latent heat exchange unit for fluid. In addition, it is necessary to integrally form a heat exchanger for hot water supply and a heat exchanger for fluid, respectively, and a very complicated configuration is required as a heat exchanger for hot water supply and a heat exchanger for fluid. In particular, when the structure of the latent heat exchange section is a double pipe structure using a stainless steel pipe and a copper pipe in order to improve the corrosion resistance, there is a problem in workability.

また、バーナで加熱される経路として、給湯用と流体用の２つの経路を形成しているため、配管構成が複雑になるとともに、単独運転時に運転停止側の熱交換器内の残水の沸騰が発生するという課題を有するものであった。   In addition, since two paths for hot water supply and fluid are formed as the paths heated by the burner, the piping configuration becomes complicated and the boiling of the residual water in the heat exchanger on the shutdown side during single operation It has a problem of generating.

本発明は前記従来の課題を解決するもので、給湯用熱交換器と潜熱回収用熱交換器で１つの加熱経路を形成し、前記加熱経路の循環水を利用して暖房回路や風呂追い焚き回路に熱量を供給する給湯循環回路を構成とすることで、前記給湯用熱交換器や潜熱回収用熱交換器に関連しない利用側熱交換器の構成を可能とし、配管構成を含む本体構成の簡素化により器具の小型化、軽量化を実現するとともに、前記給湯循環回路を長時間使用しない場合でも、滞留水に銅イオンが析出したり、雑菌が増殖したりすることを防止し、かつ滞留水が給湯側へ出湯することを防止し、衛生的で使い勝手のよい給湯装置を提供する。また、給湯回路を主体とする１つの加熱経路構成とすることで、単独運転時における熱交換器内の残水沸騰問題を解消するとともに、潜熱回収用熱交換器の耐食性向上のための構成を容易にし、高効率でランニングコストの低減を図った給湯装置を提供することを目的とす
る。 The present invention solves the above-described conventional problems, and forms a single heating path with a hot water supply heat exchanger and a latent heat recovery heat exchanger, and uses a circulating water in the heating path to reheat a heating circuit and a bath. By configuring a hot water supply circulation circuit that supplies heat to the circuit, it is possible to configure a use side heat exchanger that is not related to the hot water heat exchanger or latent heat recovery heat exchanger, and a main body configuration including a pipe configuration. Simplification reduces the size and weight of the appliance, prevents copper ions from precipitating in the stagnant water, and the growth of germs, even when the hot water circulation circuit is not used for a long time. To provide a hot water supply device that prevents water from flowing out to the hot water supply side and is hygienic and easy to use. In addition, by adopting a single heating path configuration mainly composed of a hot water supply circuit, the configuration for improving the corrosion resistance of the latent heat recovery heat exchanger is solved while solving the problem of residual water boiling in the heat exchanger during single operation. It is an object of the present invention to provide a hot water supply device that is easy and has high efficiency and reduced running costs.

前記従来の課題を解決するために、本発明の給湯装置は、給水路より供給される水をバーナの燃焼により加熱し出湯路に湯水を供給する給湯用熱交換器と、前記バーナの燃焼排ガス経路中に配置し燃焼排ガスの潜熱を回収する潜熱回収用熱交換器と、前記給湯用熱交換器と潜熱回収用熱交換器を直列に接続して、給水路から潜熱回収用熱交換器を通り給湯用熱交換器を経て出湯路に至る給湯回路と、前記出湯路から分岐し循環ポンプを介して利用側熱交換器に供給した後、前記潜熱回収用熱交換器に戻し、潜熱回収用熱交換器から給湯用熱交換器を通り循環ポンプを介して利用側熱交換器に至る給湯循環回路と、定期的に前期循環ポンプを所定時間運転した後、前記給湯循環回路内の滞留水を排水することにより、前記循環回路に長時間水が滞留しないようにしたものである。   In order to solve the above-mentioned conventional problems, a hot water supply apparatus of the present invention includes a hot water supply heat exchanger that heats water supplied from a water supply channel by combustion of a burner and supplies hot water to a hot water supply channel, and combustion exhaust gas of the burner A latent heat recovery heat exchanger that is disposed in the path to recover the latent heat of the combustion exhaust gas, and the hot water supply heat exchanger and the latent heat recovery heat exchanger are connected in series, and a latent heat recovery heat exchanger is connected from the water supply channel. A hot water supply circuit that passes through a hot water supply heat exchanger to a hot water supply path, and is branched from the hot water supply path and supplied to the use side heat exchanger via a circulation pump, and then returned to the latent heat recovery heat exchanger, for latent heat recovery. After the hot water circulation circuit from the heat exchanger through the hot water supply heat exchanger to the use side heat exchanger via the circulation pump and the previous period circulation pump are operated for a predetermined period of time, the accumulated water in the hot water circulation circuit is removed. By draining, the circulation circuit will have water for a long time. It is that so as not to distillate.

これによって、給湯用熱交換器と潜熱回収用熱交換器で１つの加熱経路を形成し、前記加熱経路の循環水を利用して暖房回路や風呂追い焚き回路に熱量を供給する構成としているため、前記給湯用熱交換器や潜熱回収用熱交換器に関連しない利用側熱交換器の構成を可能とし、配管構成を含む本体構成の簡素化により器具の小型化、軽量化を実現するとともに、前記給湯循環回路を長時間使用しない場合でも、滞留水に銅イオンが析出したり、雑菌が増殖したりすることを防止し、かつ滞留水が給湯側へ出湯することを防止し、衛生的で使い勝手のよい給湯装置を提供することができ、また、給湯回路を主体とする１つの加熱経路構成とすることで、単独運転時における熱交換器内の残水沸騰問題を解消するとともに、潜熱回収用熱交換器の耐食性向上のための構成を容易にし、高効率でランニングコストの低減を図った給湯装置を提供することができる。   As a result, one heating path is formed by the hot water supply heat exchanger and the latent heat recovery heat exchanger, and the amount of heat is supplied to the heating circuit and the bath reheating circuit using the circulating water of the heating path. , Enabling the configuration of the use side heat exchanger not related to the heat exchanger for hot water supply and the heat exchanger for recovering latent heat, realizing the downsizing and weight reduction of the appliance by simplifying the main body configuration including the piping configuration, Even when the hot water circulation circuit is not used for a long time, it prevents the copper ions from depositing in the stagnant water and the growth of various germs, and prevents the stagnant water from flowing out to the hot water supply side. An easy-to-use hot water supply device can be provided, and by using a single heating path configuration mainly consisting of a hot water supply circuit, the problem of residual water boiling in the heat exchanger during single operation can be solved and latent heat recovery can be achieved. For heat exchanger To facilitate construction for food improvement, it is possible to provide a water heater which thereby reducing the running cost with high efficiency.

本発明の給湯装置は、給湯用熱交換器と潜熱回収用熱交換器で１つの加熱経路を形成し、前記加熱経路の循環水を利用して暖房回路や風呂追い焚き回路に熱量を供給する構成とすることで、前記給湯用熱交換器や潜熱回収用熱交換器に関連しない利用側熱交換器の構成を可能とし、配管構成を含む本体構成の簡素化により器具の小型化、軽量化を実現するとともに、定期的に前記循環ポンプを所定時間運転した後、前記給湯循環回路内の滞留水を排水することにより、前記循環回路に長時間水が滞留しないようにしたもので、衛生的で使い勝手のよい給湯装置を提供することができる。   The hot water supply apparatus of the present invention forms one heating path with a hot water supply heat exchanger and a latent heat recovery heat exchanger, and supplies heat to a heating circuit or a bath reheating circuit using the circulating water of the heating path. By adopting a configuration, it is possible to configure a heat exchanger on the use side that is not related to the heat exchanger for hot water supply or the heat exchanger for recovering latent heat. In addition, after the circulating pump is periodically operated for a predetermined time, the accumulated water in the hot water supply circulation circuit is drained to prevent the water from staying in the circulation circuit for a long time. It is possible to provide a hot water supply device that is easy to use.

また、給湯回路を主体とする１つの加熱経路構成とすることで、単独運転時における熱交換器内の残水沸騰問題を解消するとともに、潜熱回収用熱交換器の耐食性向上のための構成を容易にし、高効率でランニングコストの低減を図った給湯装置を提供することができる。   In addition, by adopting a single heating path configuration mainly composed of a hot water supply circuit, the configuration for improving the corrosion resistance of the latent heat recovery heat exchanger is solved while solving the problem of residual water boiling in the heat exchanger during single operation. It is possible to provide a hot water supply device that is easy and highly efficient with reduced running costs.

第１の発明は、給水路より供給される水をバーナの燃焼により加熱し出湯路に湯水を供給する給湯用熱交換器と、前記バーナの燃焼排ガス経路中に配置し燃焼排ガスの潜熱を回収する潜熱回収用熱交換器と、前記給湯用熱交換器と潜熱回収用熱交換器を直列に接続して、給水路から潜熱回収用熱交換器を通り給湯用熱交換器を経て出湯路に至る給湯回路と、前記出湯路から分岐し循環ポンプを介して利用側熱交換器に供給した後、前記潜熱回収用熱交換器に戻し、潜熱回収用熱交換器から給湯用熱交換器を通り循環ポンプを介して利用側熱交換器に至る給湯循環回路と、定期的に前記循環ポンプを所定時間運転した後、前記給湯循環回路内の滞留水を排水することにより、前記循環回路に長時間水が滞留しないようにしたことを特徴としたものである。これにより給湯用熱交換器と潜熱回収用熱交換器で１つの加熱経路を形成し、前記加熱経路の循環水を利用して暖房回路や風呂追い焚き回路に熱量を供給する構成とすることで、前記給湯用熱交換器や潜熱回収用熱交換器に関
連しない利用側熱交換器の構成を可能とし、配管構成を含む本体構成の簡素化により器具の小型化、軽量化を実現するとともに、前記給湯循環回路を長時間使用しない場合でも、滞留水に銅イオンが析出したり、雑菌が増殖したりすることを防止し、かつ滞留水が給湯側へ出湯することを防止し、衛生的で使い勝手のよい給湯装置を提供することができ、また、給湯回路を主体とする１つの加熱経路構成とすることで、単独運転時における熱交換器内の残水沸騰問題を解消するとともに、潜熱回収用熱交換器の耐食性向上のための構成を容易にし、高効率でランニングコストの低減を図った給湯装置を提供することができる。 A first aspect of the invention is a hot water supply heat exchanger that heats water supplied from a water supply channel by combustion of a burner and supplies hot water to a hot water supply channel, and recovers the latent heat of the combustion exhaust gas disposed in the combustion exhaust gas path of the burner. The latent heat recovery heat exchanger, the hot water supply heat exchanger, and the latent heat recovery heat exchanger are connected in series, passing through the latent heat recovery heat exchanger from the water supply path to the hot water supply path through the hot water supply heat exchanger. A hot water supply circuit, a branch from the hot water supply path, and supplied to the use side heat exchanger via a circulation pump, and then returned to the latent heat recovery heat exchanger, from the latent heat recovery heat exchanger through the hot water supply heat exchanger. A hot water supply circulation circuit that reaches the user-side heat exchanger via the circulation pump, and after periodically operating the circulation pump for a predetermined time, draining the accumulated water in the hot water supply circulation circuit, Also featured to prevent water from staying It is. Thereby, one heating path is formed by the heat exchanger for hot water supply and the heat exchanger for latent heat recovery, and the amount of heat is supplied to the heating circuit and the bath reheating circuit using the circulating water of the heating path. , Enabling the configuration of the use side heat exchanger not related to the heat exchanger for hot water supply and the heat exchanger for recovering latent heat, realizing the downsizing and weight reduction of the appliance by simplifying the main body configuration including the piping configuration, Even when the hot water circulation circuit is not used for a long time, it prevents the copper ions from depositing in the stagnant water and the growth of various germs, and prevents the stagnant water from flowing out to the hot water supply side. An easy-to-use hot water supply device can be provided, and by using a single heating path configuration mainly consisting of a hot water supply circuit, the problem of residual water boiling in the heat exchanger during single operation can be solved and latent heat recovery can be achieved. Corrosion resistance of industrial heat exchangers The arrangement facilitates for the above, it is possible to provide a water heater which thereby reducing the running cost with high efficiency.

第２の発明は、定期的に前記循環ポンプを所定時間運転した後におこなう排水運転時に、前記給水路に設けた水量センサーで通水量を検出し、前記出湯路に設けた水量制御弁を制御して、排水運転時の通水量を所定の通水量に制御するようにしたものである。これにより排水運転時に排水口からの排水の水流を制御することができ、排水した水の飛散や排水音を抑制する事が出来る。   According to a second aspect of the present invention, during a drainage operation performed after the circulation pump has been operated periodically for a predetermined time, a water amount sensor provided in the water supply passage detects a water flow amount and controls a water amount control valve provided in the tap water passage. Thus, the water flow amount during the drain operation is controlled to a predetermined water flow amount. Thereby, the water flow of the drainage from the drainage port can be controlled during the drainage operation, and scattering of drained water and drainage noise can be suppressed.

第３の発明は、定期的に前記循環ポンプを所定時間運転した後におこなう排水運転時の排水量を、前記給水路に設けた水量センサーにてカウントして、所定の水量で排水運転を終了することにより、一定の排水量で排水運転をするようにしたものである。これにより、排水運転時に前記給湯循環回路内の水を置換できる必要な水量で排水運転をすることができ、余分な水を排水するのを抑制することができる。   According to a third aspect of the present invention, the amount of drainage at the time of drainage operation that is performed after the circulation pump is periodically operated for a predetermined time is counted by a water amount sensor provided in the water supply channel, and the drainage operation is terminated with a predetermined amount of water. Thus, the drainage operation is performed with a certain amount of drainage. Thereby, the drainage operation can be performed with a necessary amount of water that can replace the water in the hot water supply circulation circuit during the drainage operation, and the drainage of excess water can be suppressed.

第４の発明は、定期的に前記循環ポンプを所定時間運転した後におこなう排水運転時に、排水時間を一定時間に制御して運転するようにしたものである。これにより、排水運転が毎回同じ時間で終了させることができ、給湯装置を使用していない時に突然動作する排水運転が、使用者に不安感を与える恐れがあったが、このことを抑制することができる。第５の発明は、前記循環ポンプが一定時間停止した後に、排水運転を開始するようにしたものである。これにより、給湯循環回路の使用状態に合わせて、必要な時に排水運転を行うことができ、必要以上に水を排水するのを抑制することができる。   According to a fourth aspect of the present invention, during the drainage operation that is performed after the circulating pump is periodically operated for a predetermined time, the drainage time is controlled to be a constant time. As a result, the drainage operation can be finished every time at the same time, and the drainage operation that suddenly operates when the hot water supply device is not used may cause anxiety to the user. Can do. In a fifth aspect of the invention, the drainage operation is started after the circulation pump has been stopped for a certain time. Thereby, according to the use condition of a hot-water supply circulation circuit, drainage operation can be performed when needed, and it can control that water is drained more than necessary.

第６の発明は、前記循環ポンプが一定時間停止した後の所定の時刻に、排水運転を開始するようにしたものである。これにより、給湯循環回路の使用状態に合わせて、必要な時に排水運転を行うことができ、必要以上に水を排水するのを抑制することができるとともに、常に一定の時刻に前記排水運転を行うので機器が勝手に動くといった不安感をユーザーに与える事が少ない。   In a sixth aspect of the invention, the drainage operation is started at a predetermined time after the circulation pump has been stopped for a certain period of time. Thereby, according to the use condition of the hot water supply circulation circuit, the drainage operation can be performed when necessary, the drainage of water can be suppressed more than necessary, and the drainage operation is always performed at a constant time. Therefore, it is less likely to give the user anxiety that the device moves freely.

以下、本発明の実施の形態について、図面を参照しながら説明する。なお、本実施の形態によって本発明が限定されるものではない。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. Note that the present invention is not limited to the present embodiment.

（実施の形態１）
図１は、本発明の第１の実施の形態における給湯装置の構造図を示すものである。
図１において、まず給水路１より供給される水をバーナ２の燃焼により加熱し所定の温度に上昇した後、出湯路３に供給し、前記給水路１と出湯路３を連通して形成したバイパス通路４から給水路１より供給される水の一部をバイパス制御弁５を介して供給することで所望の湯水に調整し、給湯栓６より出湯する給湯回路を構成している。 (Embodiment 1)
FIG. 1 shows a structural diagram of a hot water supply apparatus according to a first embodiment of the present invention.
In FIG. 1, first, water supplied from a water supply path 1 is heated by combustion of a burner 2 to rise to a predetermined temperature, then supplied to a hot water supply path 3, and the water supply path 1 and the hot water supply path 3 are formed in communication with each other. A part of water supplied from the water supply channel 1 from the bypass passage 4 is supplied through the bypass control valve 5 to adjust to a desired hot water, and a hot water supply circuit for discharging hot water from the hot water tap 6 is configured.

ここで、バーナ２はガス元電磁弁７、ガス比例弁８、ガス切替弁９が配設されたガス供給路１０より燃料が供給され、燃焼用ファン１１より燃焼用空気が供給されて、予め定められたシーケンスに従い燃焼動作が行われる。そして、バーナ２の燃焼により発生する燃焼ガスは燃焼室１２を通って排気通路１３を経由し排気口１４から器具外に排出される。   Here, the burner 2 is supplied with fuel from a gas supply passage 10 provided with a gas source solenoid valve 7, a gas proportional valve 8, and a gas switching valve 9, and supplied with combustion air from a combustion fan 11, in advance. A combustion operation is performed according to a predetermined sequence. Then, the combustion gas generated by the combustion of the burner 2 passes through the combustion chamber 12, passes through the exhaust passage 13, and is discharged out of the instrument from the exhaust port 14.

この燃焼ガスの排気経路に燃焼ガスの顕熱を回収する給湯用熱交換器１５と燃焼排ガスの潜熱を回収する潜熱回収用熱交換器１６を配設している。具体的には、バーナ２の下流側燃焼室１２に給湯用熱交換器１５を設け、その下流側排気通路１３に潜熱回収用熱交換器１６を設け、前記給水路１より供給される水を、まず潜熱回収用熱交換器１６に供給し燃焼排ガス中の潜熱を回収したのち、給湯用熱交換器１５に供給しバーナ２の燃焼により所定の高温水に上昇させて出湯路３に供給する。このように従来の給湯用熱交換器１５による熱回収に加え、燃焼排ガスの潜熱を回収する潜熱回収用熱交換器１６を設けることで、総合的な熱効率を高め省エネを図るものである。   A hot water supply heat exchanger 15 that recovers sensible heat of the combustion gas and a latent heat recovery heat exchanger 16 that recovers the latent heat of the combustion exhaust gas are disposed in the exhaust path of the combustion gas. Specifically, a hot water supply heat exchanger 15 is provided in the downstream combustion chamber 12 of the burner 2, a latent heat recovery heat exchanger 16 is provided in the downstream exhaust passage 13, and water supplied from the water supply passage 1 is supplied. First, the heat is supplied to the latent heat recovery heat exchanger 16 to recover the latent heat in the combustion exhaust gas, and then supplied to the hot water supply heat exchanger 15 to be heated to a predetermined high temperature water by combustion of the burner 2 and supplied to the hot water outlet 3. . Thus, in addition to heat recovery by the conventional hot water supply heat exchanger 15, by providing the latent heat recovery heat exchanger 16 for recovering the latent heat of the combustion exhaust gas, the overall thermal efficiency is improved and energy saving is achieved.

次に、出湯路３から分岐し循環ポンプ１７を介して利用側熱交換器である暖房用熱交換器１８に、潜熱回収用熱交換器１６および給湯用熱交換器１５で加熱された高温水を供給した後、前記潜熱回収用熱交換器１６の上流側給水路１に戻し、潜熱回収用熱交換器１６から給湯用熱交換器１５を通り循環ポンプ１７を介して暖房用熱交換器１８に至る給湯循環回路１９を構成している。この給湯循環回路１９は、給湯用熱交換器１５の出口近傍の出湯路３から分岐するようにしているため、バーナ２で加熱された高温の湯水を利用して利用側負荷に熱量を供給することが可能であり、後述する暖房回路などに用いると最適である。また、風呂用熱交換器２７は給湯循環回路１９に暖房用熱交換器１８と並列に接続され、同様に熱量を供給することが可能であり、後述する風呂回路などに用いる。   Next, the hot water branched from the hot water supply passage 3 and heated by the latent heat recovery heat exchanger 16 and the hot water supply heat exchanger 15 to the heating heat exchanger 18 which is the use side heat exchanger via the circulation pump 17. Is then returned to the upstream water supply channel 1 of the latent heat recovery heat exchanger 16, passed from the latent heat recovery heat exchanger 16 through the hot water supply heat exchanger 15, and via the circulation pump 17, the heating heat exchanger 18. The hot water supply circulation circuit 19 leading to is constructed. Since this hot water supply circulation circuit 19 is branched from the hot water supply passage 3 near the outlet of the hot water supply heat exchanger 15, the hot water supplied by the burner 2 is used to supply heat to the use side load. Therefore, it is most suitable when used for a heating circuit described later. The bath heat exchanger 27 is connected to the hot water supply circulation circuit 19 in parallel with the heating heat exchanger 18, and can similarly supply heat, and is used for a bath circuit described later.

暖房回路２０は、暖房用熱交換器１８の２次側に放熱機２１等の負荷を接続して閉回路を形成し、暖房用ポンプ２２で循環させることにより、前記暖房用熱交換器１８で給湯循環回路１９より供給される高温水と熱交換して暖房熱量を確保するようにしている。   The heating circuit 20 forms a closed circuit by connecting a load such as a radiator 21 to the secondary side of the heating heat exchanger 18, and circulates it by the heating pump 22. Heat is exchanged with the high-temperature water supplied from the hot water supply circulation circuit 19 to ensure the amount of heating heat.

風呂回路２８は、風呂用ポンプ２９で浴槽３１内の水を循環させ、前記風呂用熱交換器２７で給湯循環回路１９より供給される高温水と熱交換して、風呂を追いだきすることができるようにしている。また浴槽３１へお湯はりするために出湯路３から風呂回路２８へお湯はり路３４と，お湯はりの開閉を行う注湯弁３５を設けている。   The bath circuit 28 circulates the water in the bathtub 31 with the bath pump 29 and exchanges heat with the high-temperature water supplied from the hot water supply circulation circuit 19 with the bath heat exchanger 27 to drive the bath. I can do it. Further, in order to apply hot water to the bathtub 31, a hot water supply path 34 from the hot water supply path 3 to the bath circuit 28 and a pouring valve 35 for opening and closing the hot water supply are provided.

以上のように構成された燃焼装置について、以下その動作、作用を説明する。   About the combustion apparatus comprised as mentioned above, the operation | movement and an effect | action are demonstrated below.

給湯運転時には、給湯栓６を開くと給水路１に配設した給水側流量センサー２３が通水を検知し、この通水信号で燃焼用ファン１１が動作し同時にガス元電磁弁７、ガス比例弁８が開き、バーナ２に燃料と燃焼用空気が供給されて着火動作により燃焼が開始する。このバーナ２の燃焼開始により発生した燃焼ガスは燃焼室１２から排気通路１３を経由して排気口１４より排出される。この燃焼ガスの排気動作の過程において燃焼室１２に配設した給湯用熱交換器１５と排気通路１３に配設した潜熱回収用熱交換器１６で給水路１より供給される水が加熱される。   During the hot water supply operation, when the hot water tap 6 is opened, the water supply side flow rate sensor 23 disposed in the water supply passage 1 detects water flow, and the combustion fan 11 is operated by this water flow signal and simultaneously the gas source solenoid valve 7 and the gas proportional. The valve 8 is opened, fuel and combustion air are supplied to the burner 2, and combustion is started by an ignition operation. Combustion gas generated by the start of combustion of the burner 2 is discharged from the exhaust port 14 via the exhaust passage 13 from the combustion chamber 12. In the process of exhausting the combustion gas, the water supplied from the water supply passage 1 is heated by the hot water supply heat exchanger 15 disposed in the combustion chamber 12 and the latent heat recovery heat exchanger 16 disposed in the exhaust passage 13. .

給湯用熱交換器１５で加熱された湯水は、前記給湯用熱交換器１５と潜熱回収用熱交換器１６を迂回するように給水路１と出湯路３を連通して設けたバイパス通路４に配設したバイパス制御弁５により入水側の水と混合される。混合された湯は遠隔操作用リモコン２４で設定した給湯設定温度になるよう出湯サーミスター２５の信号によりバイパス制御弁５の開度を調整し、給湯接続口２６を経て給湯栓６より給湯される。   Hot water heated by the hot water supply heat exchanger 15 passes through a bypass passage 4 provided in communication between the water supply passage 1 and the hot water supply passage 3 so as to bypass the hot water supply heat exchanger 15 and the latent heat recovery heat exchanger 16. The bypass control valve 5 is mixed with the water on the incoming side. The opening of the bypass control valve 5 is adjusted by a signal from the hot water thermistor 25 so that the mixed hot water reaches a hot water supply set temperature set by the remote control remote controller 24, and hot water is supplied from the hot water tap 6 through the hot water connection port 26. .

このように、給湯単独運転を選択する場合は、遠隔操作用リモコン２４で所望の温度を設定し給湯栓６を開くことで自動的に設定された湯温の湯水を確保することができる。   Thus, when selecting the hot water supply independent operation, the hot water set automatically can be secured by setting a desired temperature with the remote control remote controller 24 and opening the hot water tap 6.

暖房運転時には、放熱機２１等の暖房端末装置に内蔵した制御器（図示せず）の運転指令で、暖房回路２０に設けた暖房用ポンプ２２が駆動し、この運転指令に連動して給湯循環回路１９の湯水を循環させる循環ポンプ１７が駆動し、同時にバーナ２の着火動作によ
り燃焼が開始する。このバーナ２の燃焼開始により発生した燃焼ガスは燃焼室１２から排気通路１３を経由して排気口１４より排出される。この燃焼ガスの排気動作の過程において燃焼室１２に配設した給湯用熱交換器１５と排気通路１３に配設した潜熱回収用熱交換器１６で給水路１より供給される水が加熱される。 During the heating operation, a heating pump 22 provided in the heating circuit 20 is driven by an operation command of a controller (not shown) built in the heating terminal device such as the radiator 21, and hot water circulation is linked to the operation command. The circulation pump 17 for circulating hot water in the circuit 19 is driven, and at the same time, combustion is started by the ignition operation of the burner 2. Combustion gas generated by the start of combustion of the burner 2 is discharged from the exhaust port 14 via the exhaust passage 13 from the combustion chamber 12. In the process of exhausting the combustion gas, the water supplied from the water supply passage 1 is heated by the hot water supply heat exchanger 15 disposed in the combustion chamber 12 and the latent heat recovery heat exchanger 16 disposed in the exhaust passage 13. .

給湯用熱交換器１５で加熱された湯水は循環ポンプ１７で暖房用熱交換器１８に供給され、水−水熱交換構成により熱交換され暖房回路２０へ伝熱される。暖房用熱交換器２０で受熱した暖房回路２０の熱は、放熱機２１で温風として放熱される。そして、暖房用熱交換器１８で熱交換された高温水は潜熱回収用熱交換器１６の上流側給水路１に戻し、給湯循環回路１９を形成し、放熱機２１からの暖房運転指令が発せられている間、所定の湯温に維持して循環を継続する。   Hot water heated by the hot water supply heat exchanger 15 is supplied to the heating heat exchanger 18 by the circulation pump 17, and heat is exchanged by the water-water heat exchange configuration and is transferred to the heating circuit 20. Heat of the heating circuit 20 received by the heating heat exchanger 20 is radiated as warm air by the radiator 21. And the high temperature water heat-exchanged with the heat exchanger 18 for heating returns to the upstream water supply path 1 of the heat exchanger 16 for latent heat collection | recovery, forms the hot-water supply circulation circuit 19, and issues the heating operation command from the radiator 21 While it is being circulated, it is maintained at a predetermined hot water temperature and continues to circulate.

また、風呂運転時には、遠隔操作用リモコン２４の運転指令で、風呂回路２８にも受けた風呂ポンプ２９が駆動し水流検知部３０にて循環が検知されると、連動して給湯循環回路１９の温水を循環させるポンプ１７が駆動することによりバーナ２に着火し、燃焼された熱を回収する給湯用熱交換器１５で加熱された温水は風呂用熱交換器２７で熱交換され風呂回路２８へ伝熱される。風呂用熱交換器２７で受熱した風呂回路２８の熱は、浴槽３１へ循環し追いだき加熱される。   Further, during bath operation, when the bath pump 29 received by the bath circuit 28 is driven by the operation command of the remote control remote controller 24 and circulation is detected by the water flow detection unit 30, the hot water supply circulation circuit 19 The pump 17 that circulates hot water is ignited to ignite the burner 2, and the hot water heated by the hot water supply heat exchanger 15 that recovers the burned heat is heat-exchanged by the bath heat exchanger 27 and then sent to the bath circuit 28. Heat is transferred. The heat of the bath circuit 28 received by the bath heat exchanger 27 is circulated to the bathtub 31 and heated.

排水運転は、循環ポンプ１７を所定時間運転し、注湯弁３５を開いて給湯循環回路１９内の水を浴槽３１へ排水する。給湯装置が運転していない状態は、遠隔操作リモコンがＯＦＦしている時等あらかじめ設定しておく。この排水運転時に、給水路１の水量センサー２３で検出している流量を、排水運転時の設定流量になるように、出湯路３の水量制御弁３６の開度を調整してで制御する。また排水運転開始からの水量センサー２３の積算流量をカウントして、給湯循環回路１９内の滞留水量が排水できる水量からあらかじめ設定した設定水量をカウントしたら、注湯弁３５を閉にして、排水運転を終了させる。   In the drainage operation, the circulation pump 17 is operated for a predetermined time, the pouring valve 35 is opened, and the water in the hot water supply circulation circuit 19 is drained to the bathtub 31. The state where the hot water supply device is not operating is set in advance when the remote control remote control is turned off. During the drainage operation, the flow rate detected by the water amount sensor 23 in the water supply channel 1 is controlled by adjusting the opening degree of the water amount control valve 36 in the tap water channel 3 so that the flow rate detected during the drainage operation becomes the set flow rate. When the integrated flow rate of the water amount sensor 23 from the start of the drainage operation is counted and the set amount of water set in advance from the amount of water that can be drained from the hot water circulation circuit 19 is counted, the pouring valve 35 is closed and the drainage operation is performed. End.

図２は、本発明の第１の実施の形態における排水運転の運転状態を示すものである。   FIG. 2 shows an operation state of the drainage operation in the first embodiment of the present invention.

図２において、排水運転は、所定時間循環ポンプ１７を運転した後、注湯弁３５を開いて開始する。注湯弁３５を開けるとき水量制御弁３６は閉の状態にしておき、注湯弁３５を開後、水量制御弁３６も開の方向へ駆動させ、水量センサー２３が検知する流量が設定の流量になるまで制御する。水量センサー２３は、排水運転開始からの積算の流量をカウントし、設定の水量をカウントしたら注湯弁３５を閉にして、排水運転を終了させる。   In FIG. 2, the drainage operation is started by opening the pouring valve 35 after operating the circulation pump 17 for a predetermined time. When the pouring valve 35 is opened, the water amount control valve 36 is closed. After the pouring valve 35 is opened, the water amount control valve 36 is also driven in the opening direction, and the flow rate detected by the water amount sensor 23 is the set flow rate. Control until. The water amount sensor 23 counts the integrated flow rate from the start of the drainage operation, and when the set amount of water is counted, closes the pouring valve 35 and ends the drainage operation.

このことで、給湯循環回路１９を長時間使用しない場合でも、排水運転により循環ポンプ１７、暖房用熱交換器１８、風呂用熱交換器２７、給湯循環回路１９に溜まった滞留水を排水することにより、に銅イオンが析出したり、雑菌が増殖したりすることを防止することができる。   Thus, even when the hot water supply circulation circuit 19 is not used for a long time, the accumulated water accumulated in the circulation pump 17, the heating heat exchanger 18, the bath heat exchanger 27, and the hot water supply circulation circuit 19 is drained by the drainage operation. Therefore, it is possible to prevent copper ions from being deposited and bacteria from growing.

（実施の形態２）
図３は、本発明の第２の実施の形態における排水運転の運転状態を示すものである。 (Embodiment 2)
FIG. 3 shows the operating state of the drainage operation in the second embodiment of the present invention.

図３において、循環ポンプ１７が一定時間停止した状態が継続した場合、所定の時刻に所定時間循環ポンプ１７を運転した後、注湯弁３５を開いて開始する。注湯弁３５を開けるとき水量制御弁３６は閉の状態にしておき、注湯弁３５を開後、水量制御弁３６も開の方向へ駆動させ、水量センサー２３が検知する流量が設定の流量になるまで制御する。水量センサー２３は、排水運転開始からの積算の流量をカウントし、設定の水量をカウントしたら注湯弁３５を閉にして、排水運転を終了させる。   In FIG. 3, when the state where the circulation pump 17 is stopped for a certain time continues, the circulation pump 17 is operated for a predetermined time at a predetermined time, and then the pouring valve 35 is opened to start. When the pouring valve 35 is opened, the water amount control valve 36 is closed. After the pouring valve 35 is opened, the water amount control valve 36 is also driven in the opening direction, and the flow rate detected by the water amount sensor 23 is the set flow rate. Control until. The water amount sensor 23 counts the integrated flow rate from the start of the drainage operation, and when the set amount of water is counted, closes the pouring valve 35 and ends the drainage operation.

このことで、給湯循環回路１９を長時間使用しない場合でも、排水運転により循環ポンプ１７、暖房用熱交換器１８、風呂用熱交換器２７、給湯循環回路１９に溜まった滞留水を排水することにより、に銅イオンが析出したり、雑菌が増殖したりすることを防止することができる。特に、取扱説明書等にも記載のある場合が多いが、朝一番の水は長時間機器内に滞留している事が多く、飲用や調理には不適である。その為、朝一番など、機器内に水が滞留している可能性のある時刻に行うと有効である。   Thus, even when the hot water supply circulation circuit 19 is not used for a long time, the accumulated water accumulated in the circulation pump 17, the heating heat exchanger 18, the bath heat exchanger 27, and the hot water supply circulation circuit 19 is drained by the drainage operation. Therefore, it is possible to prevent copper ions from being deposited and bacteria from growing. In particular, there are many cases where it is described in an instruction manual or the like, but the first water in the morning often stays in the device for a long time and is not suitable for drinking or cooking. Therefore, it is effective to do it at the time when there is a possibility that water is stagnating in the device, such as first in the morning.

本発明の実施の形態１における給湯装置の構造図Structure diagram of hot water supply apparatus in Embodiment 1 of the present invention 同実施の形態における排水運転の状態を示すフローチャートFlow chart showing the state of drainage operation in the same embodiment 本発明の第２の実施の形態における排水運転の状態を示すフローチャートThe flowchart which shows the state of the drain operation in the 2nd Embodiment of this invention.

符号の説明Explanation of symbols

１ 給水路
２ バーナ
３ 出湯路
１５ 給湯用熱交換器
１６ 潜熱回収用熱交換器
１７ 循環ポンプ
１８ 暖房用熱交換器（利用側熱交換器）
１９ 給湯循環回路 DESCRIPTION OF SYMBOLS 1 Water supply path 2 Burner 3 Hot water supply path 15 Heat exchanger for hot water supply 16 Heat exchanger for latent heat recovery 17 Circulation pump 18 Heat exchanger for heating (use side heat exchanger)
19 Hot water circulation circuit

Claims (6)

供給される水をバーナの燃焼により加熱し湯水を供給する給湯用熱交換器と、
前記バーナの燃焼排ガス経路中に配置し燃焼排ガスの潜熱を回収する潜熱回収用熱交換器と、
前記潜熱回収用熱交換器に水を供給する給水路と、
前記給湯用熱交換器から湯水を排出する出湯路と、
前記給湯用熱交換器及び前記潜熱回収用熱交換器を直列に接続して、前記潜熱回収用熱交換器及び前記給湯用熱交換器を介して、前記給水路及び前記出湯路を連通する給湯回路と、
利用側負荷に熱を供給する利用側熱交換器と、
前記出湯路から分岐し、循環ポンプ及び前記利用側熱交換器を介して、前記給水路に連通する給湯循環回路と、
を備え、
前記給湯回路の単独利用、前記給湯循環回路の単独利用、並びに、前記給湯回路及び前記給湯循環回路の同時利用のいずれかで通水する経路を選択し、前記循環ポンプを所定時間運転した後、前記給湯循環回路内の水を排水する排水運転を行うように制御する給湯装置。 A hot water supply heat exchanger for supplying hot water and water supplied to the heating by the combustion of the burner,
A latent heat recovery heat exchanger that is disposed in the combustion exhaust gas path of the burner and recovers the latent heat of the combustion exhaust gas;
A water supply channel for supplying water to the latent heat recovery heat exchanger;
A hot water outlet for discharging hot water from the hot water heat exchanger,
Connect a heat exchanger and the latent heat recovery heat exchanger for the hot water supply in series, through the latent heat recovery heat exchanger and the heat exchanger for the hot water, communicating the water supply passage and said hot water passage A hot water supply circuit,
A user-side heat exchanger that supplies heat to the user-side load;
Branched from the hot water passage, through the circulation pump and the use side heat exchanger, a hot water supply circulation circuit communicating with the water supply passage,
With
Alone use of the hot water supply circuit, a single use of the hot water supply circulation circuit, as well as a path for passing water in one of the simultaneous use of the hot water supply circuit and the hot water supply circulation circuit to select, after the circulation pump is operated a predetermined time A hot water supply apparatus that controls to perform a drainage operation of draining water in the hot water supply circulation circuit. 前記排水運転時に、前記給水路に設けた水量センサーで検出した通水量を基に、前記出湯路に設けた水量制御弁を制御して、排水運転時の通水量が所定の通水量となるように制御する請求項１記載の給湯装置。 Before the time of Sharing, ABS water operation, based on the passing water amount detected by the water sensor provided in the water supply passage, and controls the water amount control valve provided in the tapping passage, through water during the drainage operation and predetermined through water water heater 請 Motomeko 1 wherein that controls so. 前記排水運転時の排水量を、前記給水路に設けた水量センサーで検出した通水量を基にカウントして、所定の水量で排水運転を終了することにより、一定の排水量で排水運転をするように制御する請求項１記載の給湯装置。 The drainage operation during the drainage operation is counted based on the amount of water detected by the water amount sensor provided in the water supply channel, and the drainage operation is terminated with a predetermined amount of water, so that the drainage operation is performed with a constant drainage amount. control claims 1 Symbol mounting of the water heater. 前記排水運転時に、排水時間を一定時間で排水運転するように制御する請求項１記載の給湯装置。 The drain during operation, claim 1 Symbol mounting of the water heater is controlled so that drainage operation the drainage time at a predetermined time. 前記循環ポンプが一定時間停止した後に、前記循環ポンプを所定時間運転し、前記排水
運転を開始するように制御する請求項１〜４のいずれかに記載の給湯装置。 The hot water supply device according to any one of claims 1 to 4, wherein the circulation pump is controlled to operate for a predetermined time after the circulation pump has stopped for a predetermined time and to start the drainage operation. 前記循環ポンプが一定時間停止した後に、所定の時刻に前記循環ポンプを所定時間運転し、前記排水運転を開始するように制御する請求項５記載の給湯装置。 The hot water supply apparatus according to claim 5 , wherein the circulating pump is controlled to operate at a predetermined time for a predetermined time and to start the drainage operation after the circulating pump has stopped for a predetermined time.
JP2005296297A 2005-10-11 2005-10-11 Water heater Expired - Fee Related JP4760282B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2005296297A JP4760282B2 (en) 2005-10-11 2005-10-11 Water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2005296297A JP4760282B2 (en) 2005-10-11 2005-10-11 Water heater

Publications (2)

Publication Number Publication Date
JP2007107742A JP2007107742A (en) 2007-04-26
JP4760282B2 true JP4760282B2 (en) 2011-08-31

Family

ID=38033746

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2005296297A Expired - Fee Related JP4760282B2 (en) 2005-10-11 2005-10-11 Water heater

Country Status (1)

Country Link
JP (1) JP4760282B2 (en)

Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017164380A (en) * 2016-03-17 2017-09-21 大阪瓦斯株式会社 Mist device directly connected to hot water supply system
JP2017164381A (en) * 2016-03-17 2017-09-21 大阪瓦斯株式会社 Mist device directly connected to hot water supply system

Family Cites Families (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0714758Y2 (en) * 1988-04-13 1995-04-10 株式会社ガスター 1 can 3 circuit water heater
JPH10314516A (en) * 1997-05-21 1998-12-02 Matsushita Electric Ind Co Ltd Bath water cleaning system
JP3480319B2 (en) * 1998-06-25 2003-12-15 株式会社ノーリツ Instant hot water unit
JP2002039616A (en) * 2000-07-27 2002-02-06 Denso Corp Water heater
JP2002267262A (en) * 2001-03-07 2002-09-18 Osaka Gas Co Ltd Hot-water supply apparatus
JP2002349952A (en) * 2001-05-30 2002-12-04 Gastar Corp Single-boiler double water passage hot water feeder for bath

Also Published As

Publication number Publication date
JP2007107742A (en) 2007-04-26

Similar Documents

Publication Publication Date Title
CN108895672A (en) Burnt gas wall hanging furnace
JP4760282B2 (en) Water heater
JP5814643B2 (en) Hot water storage system
JP4867273B2 (en) Water heater
KR20140060773A (en) Boiler for heating and hot-water supply
JP4715440B2 (en) Water heater
JP4867274B2 (en) Water heater
JP2006207842A (en) Water heater
JP4400407B2 (en) Water heater
JP4779571B2 (en) Water heater
JP2006343059A (en) Hot water supply apparatus
JP4501700B2 (en) Water heater
JP4770381B2 (en) Water heater
JP2008075886A (en) Water heater
JP4770377B2 (en) Water heater
JP4715438B2 (en) Water heater
JP2008185302A (en) Hot water supply device
JP2007101052A (en) Hot water supply apparatus
JP2006057989A (en) Hot-water supply apparatus
JP4784266B2 (en) Water heater
JP2005241024A (en) Hot-water supply device and its operation method
JP2016136071A (en) One-boiler two-channel type hot water supply device
JP4624091B2 (en) Water heater
JP2007107822A (en) Water heater
JP2007078304A (en) Hot water supply device

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20081007

RD01 Notification of change of attorney

Free format text: JAPANESE INTERMEDIATE CODE: A7421

Effective date: 20091126

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20101021

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20101026

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20101213

A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20110510

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20110523

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

Free format text: PAYMENT UNTIL: 20140617

Year of fee payment: 3

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

Free format text: PAYMENT UNTIL: 20140617

Year of fee payment: 3

LAPS Cancellation because of no payment of annual fees