JP2008122037A - Hot water supply apparatus - Google Patents

Hot water supply apparatus Download PDF

Info

Publication number
JP2008122037A
JP2008122037A JP2006309359A JP2006309359A JP2008122037A JP 2008122037 A JP2008122037 A JP 2008122037A JP 2006309359 A JP2006309359 A JP 2006309359A JP 2006309359 A JP2006309359 A JP 2006309359A JP 2008122037 A JP2008122037 A JP 2008122037A
Authority
JP
Japan
Prior art keywords
hot water
water supply
combustor
supply path
path
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.)
Granted
Application number
JP2006309359A
Other languages
Japanese (ja)
Other versions
JP5130696B2 (en
Inventor
Hidemine Murahashi
秀峰 村端
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.)
Denso Corp
Original Assignee
Denso Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Denso Corp filed Critical Denso Corp
Priority to JP2006309359A priority Critical patent/JP5130696B2/en
Publication of JP2008122037A publication Critical patent/JP2008122037A/en
Application granted granted Critical
Publication of JP5130696B2 publication Critical patent/JP5130696B2/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

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]
    • Y02B30/12—Hot water central heating systems using heat pumps

Landscapes

  • Steam Or Hot-Water Central Heating Systems (AREA)

Abstract

<P>PROBLEM TO BE SOLVED: To avoid the complication of a hot water supply apparatus when adding a function of heating using hot water to the hot water supply apparatus using a burner and a heat pump jointly. <P>SOLUTION: A hot water circulating pump 80 is disposed in a common circulating line L20 connected to a heating heat exchanger 5 while uniting a burner circulating line L21 and a tank circulating line L22 out of circulating lines L19-L22 circulating hot water between the burner 1, a hot water storage tank 3 and the heating heat exchanger 5. Further, a circulating line selector valve 74 allowing the common circulating line L20 to selectively communicate with the burner circulating line L21 and the tank circulating line L22 is disposed at a connection part of the common circulating line L20, the burner circulating line L21 and the tank circulating line L22. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

本発明は、燃焼機とヒートポンプを併用する給湯装置に関するものである。   The present invention relates to a hot water supply apparatus that uses both a combustor and a heat pump.

ヒートポンプのみを用いた給湯装置において、ヒートポンプにて加熱された温水を利用して暖房を行うことが検討されているが、この場合、ヒートポンプのみでは能力が不足し、暖房負荷が大きい住宅や寒冷地等には適用できない
一方、従来技術として、例えば特許文献１および特許文献２には、ガス燃焼機とヒートポンプを併用する給湯装置が示されている。このようにガス燃焼機とヒートポンプを併用する給湯装置に、温水を利用して暖房を行う機能を付加する場合には、能力不足が解消されて、暖房負荷が大きい住宅や寒冷地等においても温水を利用して暖房を行うことが可能である。
特開２００５−２１４４５２号公報 特開２００５−２０７６２２号公報 In hot water supply systems that use only heat pumps, it has been considered to use hot water heated by heat pumps for heating, but in this case, the capacity is insufficient with only heat pumps, and houses and cold districts with large heating loads. On the other hand, as a prior art, for example, Patent Document 1 and Patent Document 2 show a hot water supply device using a gas combustor and a heat pump in combination. In this way, when adding a function of heating using hot water to a hot water supply device that uses both a gas combustor and a heat pump, the lack of capacity is resolved and hot water is also used in houses and cold districts where the heating load is large. It is possible to perform heating using.
JP-A-2005-214552 JP 2005-207622 A

しかしながら、ガス燃焼機とヒートポンプを併用する給湯装置に、温水を利用して暖房を行う機能を付加した場合、装置が複雑化してしまうという問題がある。   However, when a function of heating using hot water is added to a hot water supply device that uses both a gas combustor and a heat pump, there is a problem that the device becomes complicated.

本発明は上記点に鑑みて、燃焼機とヒートポンプを併用する給湯装置に、温水を利用して暖房を行う機能を付加する場合に、装置の複雑化を回避することを目的とする。   In view of the above points, an object of the present invention is to avoid complication of an apparatus when a function of heating using hot water is added to a hot water supply apparatus that uses both a combustor and a heat pump.

本発明は、熱媒体の放熱により暖房を行う放熱機器（４ａ、４ｂ）と、燃焼機（１）にて加熱された温水およびヒートポンプ（２）にて加熱されて貯湯タンク（３）に蓄えられた温水が選択的に流通して、その温水と熱媒体との間で熱交換を行う加熱用熱交換器（５）と、燃焼機（１）および貯湯タンク（３）と加熱用熱交換器（５）との間で温水を循環させる循環経路（Ｌ１９〜Ｌ２２）とを備え、循環経路（Ｌ１９〜Ｌ２２）は、燃焼機（１）に接続された燃焼機循環経路（Ｌ２１）と、貯湯タンク（３）に接続されたタンク循環経路（Ｌ２２）と、燃焼機循環経路（Ｌ２１）とタンク循環経路（Ｌ２２）とを合流させて加熱用熱交換器（５）に接続された共通循環経路（Ｌ２０）とを備え、さらに、共通循環経路（Ｌ２０）に配置されて温水の流れを発生させる温水循環ポンプ（８０）と、共通循環経路（Ｌ２０）を燃焼機循環経路（Ｌ２１）およびタンク循環経路（Ｌ２２）に選択的に連通させる循環経路切換弁（７４）とを備えることを特徴とする。   The present invention is stored in a hot water storage tank (3) by being heated by a heat radiating device (4a, 4b) for heating by heat radiation of a heat medium, hot water heated by a combustor (1) and a heat pump (2). The heated heat exchanger (5) for selectively circulating the hot water and exchanging heat between the warm water and the heat medium, the combustor (1) and the hot water storage tank (3), and the heating heat exchanger (5) and a circulation path (L19 to L22) for circulating hot water, and the circulation path (L19 to L22) includes a combustor circulation path (L21) connected to the combustor (1), and hot water storage A common circulation path connected to the heating heat exchanger (5) by joining the tank circulation path (L22) connected to the tank (3), the combustor circulation path (L21), and the tank circulation path (L22). (L20) and further arranged in the common circulation path (L20) A hot water circulation pump (80) that generates a flow of hot water, and a circulation path switching valve (74) that selectively connects the common circulation path (L20) to the combustor circulation path (L21) and the tank circulation path (L22). It is characterized by providing.

このようにすれば、加熱用熱交換器（５）に貯湯タンク（３）内の温水を供給する場合および加熱用熱交換器（５）に燃焼機にて加熱された温水を供給する場合のいずれにおいても、１つの温水循環ポンプ（８０）で温水の流れを発生させることができるため、装置の複雑化を回避することができる。   In this case, when supplying hot water in the hot water storage tank (3) to the heating heat exchanger (5) and supplying hot water heated by the combustor to the heating heat exchanger (5). In any case, since the flow of hot water can be generated by one hot water circulation pump (80), complication of the apparatus can be avoided.

この場合、共通循環経路は、加熱用熱交換器（５）の入口側に接続された入口側共通循環経路（Ｌ１９）と、加熱用熱交換器（５）の出口側に接続された出口側共通循環経路（Ｌ２０）とを備え、温水循環ポンプ（８０）を出口側共通循環経路（Ｌ２０）に配置し、循環経路切換弁（７４）を、出口側共通循環経路（Ｌ２０）と燃焼機循環経路（Ｌ２１）とタンク循環経路（Ｌ２２）との接続部に配置することができる。   In this case, the common circulation path includes an inlet-side common circulation path (L19) connected to the inlet side of the heating heat exchanger (5) and an outlet side connected to the outlet side of the heating heat exchanger (5). A common circulation path (L20), a hot water circulation pump (80) is arranged in the outlet-side common circulation path (L20), and a circulation path switching valve (74) is connected to the outlet-side common circulation path (L20) and the combustor circulation. It can arrange | position in the connection part of a path | route (L21) and a tank circulation path | route (L22).

このようにすれば、熱媒体との間で熱交換して温度が低下した温水が温水循環ポンプ（８０）および循環経路切換弁（７４）内を流通するため、温水循環ポンプ（８０）および循環経路切換弁（７４）の使用環境温度が下がり、温水循環ポンプ（８０）および循環経路切換弁（７４）の劣化が抑制される。   If it does in this way, since the hot water which heat-exchanged with the heat medium and the temperature fell distribute | circulates the inside of a warm water circulation pump (80) and a circulation path switching valve (74), a warm water circulation pump (80) and circulation are carried out. The use environment temperature of the path switching valve (74) is lowered, and deterioration of the hot water circulation pump (80) and the circulation path switching valve (74) is suppressed.

また、循環経路切換弁（７４）は、貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、共通循環経路（Ｌ１９、Ｌ２０）を燃焼機循環経路（Ｌ２１）に連通させることができる。   The circulation path switching valve (74) is common when the temperature of the hot water in the upper part of the hot water storage tank (3) is lower than a predetermined temperature and when the total heat quantity of the hot water in the hot water storage tank (3) is lower than the predetermined heat quantity. The circulation path (L19, L20) can be communicated with the combustor circulation path (L21).

このようにすれば、貯湯タンク（３）内の温水で暖房を行うことができない状況下では、燃焼機（１）で加熱した温水により暖房を行うことができる。   If it does in this way, in the situation where heating cannot be performed with the hot water in the hot water storage tank (3), the heating can be performed with the hot water heated by the combustor (1).

また、給水源から燃焼機（１）に水を導く燃焼機給水経路（Ｌ１４）および燃焼機循環経路（Ｌ２１）を、合流して燃焼機（１）の入口側に接続することができる。   Further, the combustor water supply path (L14) and the combustor circulation path (L21) for guiding water from the water supply source to the combustor (1) can be joined and connected to the inlet side of the combustor (1).

このようにすれば、貯湯タンク（３）内が空でも燃焼機（１）にて温水を得ることができ、一つの燃焼機（１）で暖房と給湯が可能である。   If it does in this way, even if the hot water storage tank (3) is empty, warm water can be obtained with the combustor (1), and heating and hot water supply can be performed with one combustor (1).

また、燃焼機（１）にて加熱された温水が流通する燃焼機給湯経路（Ｌ１５）と、貯湯タンク（３）の上部の温水が流通する上部給湯経路（Ｌ１２）と、燃焼機給湯経路（Ｌ１５）および上部給湯経路（Ｌ１２）に接続されて給湯部に温水を導く共通給湯経路（Ｌ１３）と、燃焼機給湯経路（Ｌ１５）および上部給湯経路（Ｌ１２）を共通給湯経路（Ｌ１３）に選択的に連通させる給湯経路切換弁（７１）とを備えることができる。   Further, a combustor hot water supply path (L15) through which hot water heated by the combustor (1) flows, an upper hot water supply path (L12) through which hot water in the upper part of the hot water storage tank (3) flows, and a combustor hot water supply path ( L15) and the upper hot water supply path (L12) are connected to the common hot water supply path (L13), and the combustor hot water supply path (L15) and the upper hot water supply path (L12) are selected as the common hot water supply path (L13). And a hot water supply path switching valve (71) to be communicated with each other.

このようにすれば、貯湯タンク（３）上部の温水と燃焼機（１）で加熱した温水を適宜に給湯に用いることができる。   If it does in this way, the hot water of the hot water storage tank (3) upper part and the hot water heated with the combustor (1) can be used for hot water supply suitably.

また、給湯経路切換弁（７１）は、貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、燃焼機給湯経路（Ｌ１５）を共通給湯経路（Ｌ１３）に連通させることができる。   The hot water supply path switching valve (71) is combusted when the temperature of the hot water in the upper part of the hot water storage tank (3) is lower than a predetermined temperature and when the total heat quantity of the hot water in the hot water storage tank (3) is lower than the predetermined heat quantity. The machine hot water supply path (L15) can be communicated with the common hot water supply path (L13).

このようにすれば、貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、燃焼機（１）で加熱した温水を給湯に用いることができる。   In this way, when the temperature of the hot water in the upper part of the hot water storage tank (3) is below a predetermined temperature and when the total heat quantity of the hot water in the hot water storage tank (3) is below the predetermined heat quantity, the combustor (1) Heated hot water can be used for hot water supply.

また、燃焼機（１）にて加熱された温水が流通する燃焼機給湯経路（Ｌ１５）と、貯湯タンク（３）の上部の温水が流通する上部給湯経路（Ｌ１２）と、燃焼機給湯経路（Ｌ１５）および上部給湯経路（Ｌ１２）に接続されて給湯部に温水を導く共通給湯経路（Ｌ１３）と、上部給湯経路（Ｌ１２）に配置されて、燃焼機給湯経路（Ｌ１５）から貯湯タンク（３）への温水の流れを阻止する給湯経路逆止弁（６４）と、貯湯タンク（３）における上下方向中間部の温水を共通給湯経路（Ｌ１３）に導く中温水給湯経路（Ｌ２８）と、燃焼機給湯経路（Ｌ１５）および上部給湯経路（Ｌ１２）から給湯部に流れる温水と中温水給湯経路（Ｌ２８）から給湯部に流れる温水の流量比を調整する中温水混合弁（７６）とを備えることができる。   Further, a combustor hot water supply path (L15) through which hot water heated by the combustor (1) flows, an upper hot water supply path (L12) through which hot water in the upper part of the hot water storage tank (3) flows, and a combustor hot water supply path ( L15) and an upper hot water supply path (L12) connected to the common hot water supply path (L13) for guiding hot water to the hot water supply section, and an upper hot water supply path (L12), and from the combustor hot water supply path (L15) to the hot water storage tank (3 A hot water supply path check valve (64) for blocking the flow of hot water to the hot water supply), an intermediate hot water hot water supply path (L28) for guiding the hot water in the middle in the vertical direction in the hot water storage tank (3) to the common hot water supply path (L13), and combustion An intermediate hot water mixing valve (76) for adjusting a flow rate ratio of hot water flowing from the machine hot water supply path (L15) and the upper hot water supply path (L12) to the hot water supply section and hot water flowing from the intermediate hot water hot water supply path (L28) to the hot water supply section is provided. Can do.

このようにすれば、給湯経路逆止弁（６４）によって、燃焼機（１）で加熱した温水が貯湯タンク（３）に流入するのを防止できる。また、中温水混合弁（７６）によって、燃焼機（１）で加熱した温水のみを給湯部に流したり、或いは燃焼機（１）で加熱した温水と貯湯タンク（３）内の温水を混合して給湯部に流すことができる。   By doing so, the hot water heated by the combustor (1) can be prevented from flowing into the hot water storage tank (3) by the hot water supply path check valve (64). Moreover, only the warm water heated by the combustor (1) is caused to flow to the hot water supply section by the intermediate warm water mixing valve (76), or the warm water heated by the combustor (1) and the warm water in the hot water storage tank (3) are mixed. Can be poured into the hot water supply section.

また、中温水混合弁（７６）は、貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、燃焼機給湯経路（Ｌ１５）および上部給湯経路（Ｌ１２）から給湯部に温水を流すとともに、中温水給湯経路（Ｌ２８）から給湯部への温水の流れを停止することができる。   The intermediate hot water mixing valve (76) is combusted when the temperature of the hot water in the upper part of the hot water storage tank (3) is lower than a predetermined temperature and when the total heat quantity of the hot water in the hot water storage tank (3) is lower than the predetermined heat quantity. While flowing hot water from the machine hot water supply path (L15) and the upper hot water supply path (L12) to the hot water supply section, the flow of hot water from the intermediate hot water hot water supply path (L28) to the hot water supply section can be stopped.

このようにすれば、貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、燃焼機（１）で加熱した温水を給湯部に流すことができる。   In this way, when the temperature of the hot water in the upper part of the hot water storage tank (3) is below a predetermined temperature and when the total heat quantity of the hot water in the hot water storage tank (3) is below the predetermined heat quantity, the combustor (1) Heated hot water can be poured into the hot water supply section.

また、燃焼機給水経路（Ｌ１４）に配置されて、燃焼機（１）から給水源側への水の流れを阻止する給水経路逆止弁（６５）を備えることができる。   Moreover, it is arrange | positioned at the combustor water supply path | route (L14), and can be provided with the water supply path | route check valve (65) which blocks | prevents the flow of the water from a combustor (1) to a water supply source side.

このようにすれば、燃焼機（１）側から燃焼機給水経路（Ｌ１４）を介して水が貯湯タンク（３）に流入するのを防止できる。   In this way, it is possible to prevent water from flowing into the hot water storage tank (3) from the combustor (1) side through the combustor water supply path (L14).

また、貯湯タンク（３）における上下方向中間部の温水を燃焼機（１）に導く燃焼機給水経路（Ｌ１４）を備えることができる。   Moreover, the combustor water supply path (L14) which guides the warm water of the intermediate part of an up-down direction in a hot water storage tank (3) to a combustor (1) can be provided.

このようにすれば、貯湯タンク（３）における上下方向中間部の温水（中温水）を燃焼機（１）で加熱して給湯に利用し、その後貯湯タンク（３）の下部の低温水をヒートポンプで加熱することにより、ヒートポンプを効率の高い領域で運転させることができる。   If it does in this way, warm water (medium temperature water) of the up-and-down direction intermediate part in hot water storage tank (3) will be heated with a combustor (1), and it will use for hot water supply, and the low temperature water of the lower part of hot water storage tank (3) will be used as a heat pump By heating with, the heat pump can be operated in a highly efficient region.

また、燃焼機給水経路（Ｌ１４）および燃焼機循環経路（Ｌ２１）は、合流して燃焼機（１）の入口側に接続することができる。このようにすれば、一つの燃焼機（１）で暖房と給湯が可能である。   Moreover, the combustor water supply path (L14) and the combustor circulation path (L21) can be joined and connected to the inlet side of the combustor (1). If it does in this way, heating and hot water supply are possible by one combustor (1).

また、燃焼機（１）にて加熱された温水が流通する燃焼機給湯経路（Ｌ１５）と、貯湯タンク（３）の上部の温水が流通する上部給湯経路（Ｌ１２）と、燃焼機給湯経路（Ｌ１５）および上部給湯経路（Ｌ１２）に接続されて給湯部に温水を導く共通給湯経路（Ｌ１３）と、燃焼機給湯経路（Ｌ１５）および上部給湯経路（Ｌ１２）を共通給湯経路（Ｌ１３）に選択的に連通させる給湯経路切換弁（７１）とを備えることができる。   Further, a combustor hot water supply path (L15) through which hot water heated by the combustor (1) flows, an upper hot water supply path (L12) through which hot water in the upper part of the hot water storage tank (3) flows, and a combustor hot water supply path ( L15) and the upper hot water supply path (L12) are connected to the common hot water supply path (L13), and the combustor hot water supply path (L15) and the upper hot water supply path (L12) are selected as the common hot water supply path (L13). And a hot water supply path switching valve (71) to be communicated with each other.

このようにすれば、貯湯タンク（３）上部の温水と燃焼機（１）で加熱した温水を適宜に給湯に用いることができる。   If it does in this way, the hot water of the hot water storage tank (3) upper part and the hot water heated with the combustor (1) can be used for hot water supply suitably.

また、貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、燃焼機（１）を作動させることができる。   Further, the combustor (1) may be operated when the temperature of the hot water in the upper part of the hot water storage tank (3) is equal to or lower than a predetermined temperature and when the total heat quantity of the hot water in the hot water storage tank (3) is lower than the predetermined heat quantity. it can.

このようにすれば、貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、貯湯タンク（３）における上下方向中間部の温水を燃焼機（１）で加熱して給湯に用いることができる。   If it does in this way, when the temperature of the warm water of the upper part of hot water storage tank (3) is below predetermined temperature, and when the total heat quantity of the warm water in hot water storage tank (3) is below predetermined heat quantity, in hot water storage tank (3) The hot water in the middle in the vertical direction can be heated by the combustor (1) and used for hot water supply.

なお、特許請求の範囲およびこの欄で記載した各手段の括弧内の符号は、後述する実施形態に記載の具体的手段との対応関係を示すものである。   In addition, the code | symbol in the bracket | parenthesis of each means described in a claim and this column shows the correspondence with the specific means as described in embodiment mentioned later.

（第１実施形態）
本発明の第１実施形態について説明する。図１は本実施形態に係る給湯装置の構成を示す模式図である。 (First embodiment)
A first embodiment of the present invention will be described. FIG. 1 is a schematic diagram showing a configuration of a hot water supply apparatus according to the present embodiment.

図１に示すように、この給湯装置は、ガスを燃焼させて水を加熱する燃焼機１、水を加熱するヒートポンプ２、ヒートポンプ２にて加熱された温水を蓄える貯湯タンク３、熱媒体の放熱により暖房を行う第１および第２放熱機器４ａ、４ｂ、燃焼機１やヒートポンプ２にて加熱された温水と熱媒体との間で熱交換を行う加熱用熱交換器５、これらの機器の作動を制御する制御装置（図示せず）等を備えている。   As shown in FIG. 1, the hot water supply apparatus includes a combustor 1 that burns gas to heat water, a heat pump 2 that heats water, a hot water storage tank 3 that stores hot water heated by the heat pump 2, and heat dissipation of the heat medium. First and second heat dissipating devices 4a and 4b for heating by heating, heat exchanger 5 for heating for exchanging heat between hot water heated by combustor 1 and heat pump 2 and the heat medium, and operation of these devices A control device (not shown) or the like is provided.

燃焼機１は、ガス供給管１１から供給されるガスと電動送風機１２により送風される空気をバーナ１３にて燃焼させ、熱交換器１４の内部を流通する水と燃焼ガスとを熱交換させて内部の水を加熱するようになっている。ガス供給管１１には、供給されるガス量を連続的に調整可能な比例弁１５と、燃焼機１の作動停止時にガス供給を遮断する遮断弁１６が配置されている。また、燃焼機１は、熱交換器１４の内部を流通する水の量を計測する流量計１７を備えている。   The combustor 1 combusts the gas supplied from the gas supply pipe 11 and the air blown by the electric blower 12 in the burner 13, and exchanges heat between the water flowing through the heat exchanger 14 and the combustion gas. It is designed to heat the water inside. The gas supply pipe 11 is provided with a proportional valve 15 that can continuously adjust the amount of gas supplied and a shutoff valve 16 that shuts off the gas supply when the operation of the combustor 1 is stopped. The combustor 1 also includes a flow meter 17 that measures the amount of water flowing through the heat exchanger 14.

ヒートポンプ２は、図示しない電動圧縮機、高圧側熱交換器、減圧装置、および蒸発器を、順次冷媒配管によって接続して構成されている。そして、電動圧縮機にて圧縮された高圧冷媒を高圧側熱交換器に流入させ、ここで、高圧冷媒と水とを熱交換して水を加熱し、高圧側熱交換器を通過した放熱後の高圧冷媒は、その後、減圧装置で低圧状態に減圧される。この低圧冷媒は蒸発器で大気等から吸熱して蒸発し、その後、電動圧縮機に吸入され、再度圧縮される。ヒートポンプ２は料金の安い夜間電力を利用して主に夜間に稼働される。   The heat pump 2 is configured by sequentially connecting an electric compressor (not shown), a high-pressure side heat exchanger, a pressure reducing device, and an evaporator through a refrigerant pipe. Then, the high-pressure refrigerant compressed by the electric compressor is caused to flow into the high-pressure side heat exchanger, where the high-pressure refrigerant and water are heat-exchanged to heat the water, and after the heat radiation that has passed through the high-pressure side heat exchanger. Thereafter, the high-pressure refrigerant is decompressed to a low-pressure state by a decompression device. The low-pressure refrigerant absorbs heat from the atmosphere or the like with an evaporator and evaporates, and then is sucked into the electric compressor and compressed again. The heat pump 2 is operated mainly at night by using low-cost night electricity.

第１放熱機器４ａは、７０℃程度に制御された熱媒体が流入して、浴室乾燥機として用いられる。第２放熱機器４ｂは、５０〜６０℃に制御された熱媒体が流入して、床暖房器として用いられる。なお、熱媒体は、水道水や、不凍液を混合した水道水等を使用できる。   The first heat radiating device 4a is used as a bathroom dryer when a heat medium controlled to about 70 ° C. flows in. The second heat radiating device 4b is used as a floor heater when a heat medium controlled at 50 to 60 ° C. flows in. As the heat medium, tap water or tap water mixed with antifreeze can be used.

加熱用熱交換器５は、燃焼機１やヒートポンプ２にて加熱された温水が流入する第１通路部５１と、放熱機器４ａ、４ｂで放熱した熱媒体が流入する第２通路部５２と、風呂１００の湯が流入する第３通路部５３とを備えている。そして、第１通路部５１の温水と第２通路部５２の熱媒体とが熱交換して熱媒体が加熱されるともに、第１通路部５１の温水と第３通路部５３の風呂水とが熱交換して風呂水が加熱されるようになっている。   The heating heat exchanger 5 includes a first passage portion 51 into which hot water heated by the combustor 1 and the heat pump 2 flows, a second passage portion 52 into which a heat medium radiated by the heat radiating devices 4a and 4b flows, And a third passage portion 53 into which hot water of the bath 100 flows. And while the hot water of the 1st channel | path part 51 and the heat medium of the 2nd channel | path part 52 heat-exchange and a heat medium is heated, the warm water of the 1st channel | path part 51 and the bath water of the 3rd channel | path part 53 are heated. The bath water is heated by heat exchange.

貯湯タンク３は、耐食性に優れた金属製（例えばステンレス製）であり、外周部に図示しない断熱材が配置されており、高温の給湯用の湯を長時間にわたって保温することができるようになっている。   The hot water storage tank 3 is made of metal (for example, made of stainless steel) having excellent corrosion resistance, and a heat insulating material (not shown) is arranged on the outer peripheral portion, so that hot water for hot water supply can be kept warm for a long time. ing.

貯湯タンク３には、例えばサーミスタを用いた複数（本例では６個）の温度センサ９０ａ〜９０ｆが縦方向に所定の間隔をあけて配置され、貯湯タンク３内の各水位レベルにおける温度を検出するようにしている。   In the hot water storage tank 3, for example, a plurality (six in this example) of temperature sensors 90 a to 90 f using a thermistor are arranged at predetermined intervals in the vertical direction to detect the temperature at each water level in the hot water storage tank 3. Like to do.

貯湯タンク３は縦長形状であり、その底面には給水導入口３１が設けられ、この給水導入口３１には貯湯タンク３内の最下部に水道水を導入するタンク給水経路Ｌ１１が接続されている。タンク給水経路Ｌ１１には、水道水の温度を検出するサーミスタ等の温度センサ９１、貯湯タンク３に導入される水道水の水圧を所定圧に調節する減圧弁６０、および、貯湯タンク３から給水源側への水の流れを阻止する逆止弁６１が配置されている。   The hot water storage tank 3 has a vertically long shape, and a water supply introduction port 31 is provided on the bottom surface thereof, and a tank water supply path L11 for introducing tap water to the lowermost part of the hot water storage tank 3 is connected to the water supply introduction port 31. . In the tank water supply path L11, a temperature sensor 91 such as a thermistor for detecting the temperature of tap water, a pressure reducing valve 60 for adjusting the pressure of tap water introduced into the hot water storage tank 3 to a predetermined pressure, and a water supply source from the hot water storage tank 3 A check valve 61 is arranged to block the flow of water to the side.

貯湯タンク３の上部には導出口３２が設けられ、導出口３２には貯湯タンク３内の上部の湯を導出するための上部給湯経路Ｌ１２が接続されている。上部給湯経路Ｌ１２には、貯湯タンク３内の圧力を設定圧以下に調整する逃がし弁６２が配置されている。上部給湯経路Ｌ１２の出口側は、台所・洗面所・浴室などの給湯部に温水を導く共通給湯経路Ｌ１３に接続されている。   A lead-out port 32 is provided in the upper part of the hot water storage tank 3, and an upper hot water supply path L <b> 12 for leading the hot water in the hot water storage tank 3 is connected to the lead-out port 32. In the upper hot water supply path L12, a relief valve 62 for adjusting the pressure in the hot water storage tank 3 to be equal to or lower than the set pressure is disposed. The outlet side of the upper hot water supply path L12 is connected to a common hot water supply path L13 that guides hot water to a hot water supply section such as a kitchen, a washroom, or a bathroom.

タンク給水経路Ｌ１１における減圧弁６０と逆止弁６１の間から燃焼機給水経路Ｌ１４が分岐されており、燃焼機給水経路Ｌ１４を介して燃焼機１の熱交換器１４に水道水が導かれるようになっている。燃焼機給水経路Ｌ１４には、燃焼機給水経路Ｌ１４を流れる水道水の流量を調整する絞り弁７０が配置されている。   The combustor water supply path L14 is branched from between the pressure reducing valve 60 and the check valve 61 in the tank water supply path L11 so that the tap water is guided to the heat exchanger 14 of the combustor 1 through the combustor water supply path L14. It has become. A throttle valve 70 for adjusting the flow rate of tap water flowing through the combustor water supply path L14 is disposed in the combustor water supply path L14.

燃焼機１の熱交換器１４は、燃焼機１にて加熱された温水が流通する燃焼機給湯経路Ｌ１５が接続されており、この燃焼機給湯経路Ｌ１５は共通給湯経路Ｌ１３に接続されている。燃焼機給湯経路Ｌ１５には、燃焼機１にて加熱された温水の温度を検出するサーミスタ等の温度センサ９２が配置されている。   The heat exchanger 14 of the combustor 1 is connected to a combustor hot water supply path L15 through which hot water heated by the combustor 1 flows, and the combustor hot water supply path L15 is connected to a common hot water supply path L13. A temperature sensor 92 such as a thermistor for detecting the temperature of hot water heated by the combustor 1 is disposed in the combustor hot water supply path L15.

上部給湯経路Ｌ１２と燃焼機給湯経路Ｌ１５と共通給湯経路Ｌ１３の合流部には、上部給湯経路Ｌ１２と燃焼機給湯経路Ｌ１５と共通給湯経路Ｌ１３の連通状態を切り換える給湯経路切換弁７１が配置されている。より詳細には、給湯経路切換弁７１は、上部給湯経路Ｌ１２および燃焼機給湯経路Ｌ１５を共通給湯経路Ｌ１３に選択的に連通させたり、３つの経路Ｌ１２、Ｌ１３、Ｌ１５のうち上部給湯経路Ｌ１２と燃焼機給湯経路Ｌ１５との間のみを連通させたり、さらには、上部給湯経路Ｌ１２から給湯部に流れる温水と燃焼機給湯経路Ｌ１５から給湯部に流れる温水の流量比を調整することができる。   A hot water supply path switching valve 71 that switches the communication state of the upper hot water supply path L12, the combustor hot water supply path L15, and the common hot water supply path L13 is disposed at the junction of the upper hot water supply path L12, the combustor hot water supply path L15, and the common hot water supply path L13. Yes. More specifically, the hot water supply path switching valve 71 selectively connects the upper hot water supply path L12 and the combustor hot water supply path L15 to the common hot water supply path L13, or the upper hot water supply path L12 of the three paths L12, L13, and L15. It is possible to communicate only with the combustor hot water supply path L15, or to adjust the flow rate ratio of the hot water flowing from the upper hot water supply path L12 to the hot water supply section and the hot water flowing from the combustor hot water supply path L15 to the hot water supply section.

燃焼機給水経路Ｌ１４における絞り弁７０の上流側から温調用給水経路Ｌ１６が分岐されており、温調用給水経路Ｌ１６を介して共通給湯経路Ｌ１３に水道水が導かれるようになっている。   The temperature adjustment water supply path L16 is branched from the upstream side of the throttle valve 70 in the combustor water supply path L14, and the tap water is guided to the common hot water supply path L13 through the temperature adjustment water supply path L16.

温調用給水経路Ｌ１６と共通給湯経路Ｌ１３の合流部には、給湯部に供給する温水の温度が所定温度になるように温水と水道水の混合割合を調整する湯水混合弁７２が配置されている。   A hot water mixing valve 72 that adjusts the mixing ratio of hot water and tap water so that the temperature of the hot water supplied to the hot water supply unit becomes a predetermined temperature is arranged at the junction of the temperature adjustment water supply route L16 and the common hot water supply route L13. .

貯湯タンク３の下部には貯湯タンク３内の最下部の水を吸入するための吸入口３３が設けられ、貯湯タンク３の上方には貯湯タンク３内の最上部に湯を吐出する吐出口３４が設けられている。吸入口３３と吐出口３４は、貯湯タンク３の下部の水を貯湯タンク３の上部に送る沸き上げ水循環経路Ｌ１７で接続されており、沸き上げ水循環経路Ｌ１７の一部はヒートポンプ２内に配置されている。   A suction port 33 for sucking water at the bottom of the hot water storage tank 3 is provided below the hot water storage tank 3, and a discharge port 34 for discharging hot water to the top of the hot water storage tank 3 above the hot water storage tank 3. Is provided. The suction port 33 and the discharge port 34 are connected by a boiling water circulation path L17 that sends water below the hot water storage tank 3 to the upper part of the hot water storage tank 3, and a part of the boiling water circulation path L17 is disposed in the heat pump 2. ing.

沸き上げ水循環経路Ｌ１７のうちヒートポンプ２内に配置された部分は、ヒートポンプ２の高圧側熱交換器に接続されており、図示しないポンプによって吸入口３３から吸入される水を高圧冷媒との熱交換により加熱し（例えば９０℃程度）、吐出口３４から貯湯タンク３内に戻すことにより、貯湯タンク３内の水を沸き上げるようにしている。   A portion of the boiling water circulation path L17 arranged in the heat pump 2 is connected to a high-pressure side heat exchanger of the heat pump 2, and heat exchanged between water sucked from a suction port 33 by a pump (not shown) with high-pressure refrigerant. The water in the hot water storage tank 3 is boiled up by heating (for example, about 90 ° C.) and returning to the hot water storage tank 3 from the discharge port 34.

沸き上げ水循環経路Ｌ１７のうち貯湯タンク３の吸入口３３とヒートポンプ２の入口側を接続する入口側沸き上げ水循環経路Ｌ１７１と、沸き上げ水循環経路Ｌ１７のうち貯湯タンク３の吐出口３４とヒートポンプ２の出口側を接続する出口側沸き上げ水循環経路Ｌ１７２は、温水バイパス経路Ｌ１８にて接続されている。   Of the boiling water circulation path L17, the inlet side boiling water circulation path L171 connecting the suction port 33 of the hot water storage tank 3 and the inlet side of the heat pump 2, and the outlet 34 of the hot water storage tank 3 and the heat pump 2 of the boiling water circulation path L17 are connected. The outlet side boiling water circulation path L172 connecting the outlet side is connected by a hot water bypass path L18.

入口側沸き上げ水循環経路Ｌ１７１と温水バイパス経路Ｌ１８との接続部には、貯湯タンク３の吸入口３３とヒートポンプ２の入口側とを連通させた状態と、温水バイパス経路Ｌ１８とヒートポンプ２の入口側とを連通させた状態とに、連通状態を切り換える切換弁７３が配置されている。出口側沸き上げ水循環経路Ｌ１７２のうち温水バイパス経路Ｌ１８の接続部よりもヒートポンプ２側には、吐出口３４からヒートポンプ２の出口側への水の流れを阻止する逆止弁６３が配置されている。   A state where the inlet 33 of the hot water storage tank 3 and the inlet side of the heat pump 2 are communicated with each other at the connection portion between the inlet side boiling water circulation path L171 and the hot water bypass path L18, and the inlet side of the hot water bypass path L18 and the heat pump 2 And a switching valve 73 for switching the communication state to the state in which the communication is established. A check valve 63 that blocks the flow of water from the discharge port 34 to the outlet side of the heat pump 2 is disposed on the outlet side boiling water circulation path L172 on the heat pump 2 side of the connection portion of the hot water bypass path L18. .

そして、沸き上げ運転を行わないときでも、外気温が低いときには、切換弁７３により温水バイパス経路Ｌ１８とヒートポンプ２の入口側とを連通させ、室外に設置されたヒートポンプ２と温水バイパス経路Ｌ１８内で水を循環させて、ヒートポンプ２内の水が凍結するのを防止するようにしている。   Even when the boiling operation is not performed, when the outside air temperature is low, the hot water bypass path L18 and the inlet side of the heat pump 2 are communicated with each other by the switching valve 73, and the heat pump 2 and the hot water bypass path L18 installed outdoors are connected. Water is circulated to prevent the water in the heat pump 2 from freezing.

燃焼機給湯経路Ｌ１５における給湯経路切換弁７１と燃焼機１との間から入口側共通循環経路Ｌ１９が分岐されており、入口側共通循環経路Ｌ１９は加熱用熱交換器５における第１通路部５１の温水入口側に接続されている。そして、燃焼機１にて加熱された温水が、燃焼機給湯経路Ｌ１５および入口側共通循環経路Ｌ１９を介して加熱用熱交換器５に導かれるとともに、貯湯タンク３内の温水が、上部給湯経路Ｌ１２、燃焼機給湯経路Ｌ１５、および入口側共通循環経路Ｌ１９を介して加熱用熱交換器５に導かれるようになっている。入口側共通循環経路Ｌ１９には、加熱用熱交換器５に導かれる温水の温度を検出するサーミスタ等の温度センサ９３が配置されている。   An inlet-side common circulation path L19 is branched from between the hot-water supply path switching valve 71 and the combustor 1 in the combustor hot-water supply path L15, and the inlet-side common circulation path L19 is a first passage portion 51 in the heat exchanger 5 for heating. It is connected to the hot water inlet side. The hot water heated by the combustor 1 is guided to the heating heat exchanger 5 through the combustor hot water supply path L15 and the inlet-side common circulation path L19, and the hot water in the hot water storage tank 3 is converted into the upper hot water supply path. It is led to the heat exchanger 5 for heating via L12, the combustor hot water supply path L15, and the inlet side common circulation path L19. A temperature sensor 93 such as a thermistor for detecting the temperature of hot water led to the heating heat exchanger 5 is disposed in the inlet-side common circulation path L19.

加熱用熱交換器５における第１通路部５１の温水出口側には、出口側共通循環経路Ｌ２０が接続されている。出口側共通循環経路Ｌ２０から、燃焼機循環経路Ｌ２１とタンク循環経路Ｌ２２が分岐されている。燃焼機循環経路Ｌ２１は燃焼機給水経路Ｌ１４における絞り弁７０と燃焼機１との間に接続されており、タンク循環経路Ｌ２２は貯湯タンク３における下部に近い位置に接続されている。   An outlet-side common circulation path L20 is connected to the hot water outlet side of the first passage portion 51 in the heat exchanger 5 for heating. The combustor circulation path L21 and the tank circulation path L22 are branched from the outlet-side common circulation path L20. The combustor circulation path L21 is connected between the throttle valve 70 and the combustor 1 in the combustor water supply path L14, and the tank circulation path L22 is connected to a position near the lower part of the hot water storage tank 3.

出口側共通循環経路Ｌ２０には、加熱用熱交換器５を通過した温水の温度を検出するサーミスタ等の温度センサ９４と、温水の流れを発生させる温水循環ポンプ８０が配置されている。出口側共通循環経路Ｌ２０と燃焼機循環経路Ｌ２１とタンク循環経路Ｌ２２との接続部には、出口側共通循環経路Ｌ２０を燃焼機循環経路Ｌ２１およびタンク循環経路Ｌ２２に選択的に連通させる循環経路切換弁７４が配置されている。   A temperature sensor 94 such as a thermistor that detects the temperature of hot water that has passed through the heat exchanger 5 for heating and a hot water circulation pump 80 that generates a flow of hot water are disposed in the outlet-side common circulation path L20. Circulation path switching that selectively connects the outlet-side common circulation path L20 to the combustor circulation path L21 and the tank circulation path L22 at the connection portion between the outlet-side common circulation path L20, the combustor circulation path L21, and the tank circulation path L22. A valve 74 is arranged.

そして、循環経路切換弁７４により出口側共通循環経路Ｌ２０と燃焼機循環経路Ｌ２１とを連通させると、加熱用熱交換器５を通過した温水は出口側共通循環経路Ｌ２０や燃焼機循環経路Ｌ２１等を介して燃焼機１の熱交換器１４に導かれる。一方、循環経路切換弁７４により出口側共通循環経路Ｌ２０とタンク循環経路Ｌ２２とを連通させると、加熱用熱交換器５を通過した温水は出口側共通循環経路Ｌ２０やタンク循環経路Ｌ２２を介して貯湯タンク３に導かれるようになっている。   When the outlet side common circulation path L20 and the combustor circulation path L21 are communicated with each other by the circulation path switching valve 74, the hot water that has passed through the heating heat exchanger 5 is discharged to the outlet side common circulation path L20, the combustor circulation path L21, and the like. To the heat exchanger 14 of the combustor 1. On the other hand, when the outlet side common circulation path L20 and the tank circulation path L22 are communicated by the circulation path switching valve 74, the hot water that has passed through the heating heat exchanger 5 passes through the outlet side common circulation path L20 and the tank circulation path L22. It is led to the hot water storage tank 3.

加熱用熱交換器５における第２通路部５２と第１放熱機器４ａは、熱媒体経路Ｌ２３にて閉ループに接続されており、加熱用熱交換器５で加熱されて高温になった熱媒体が第１放熱機器４ａに流入するようになっている。   The second passage portion 52 and the first heat radiating device 4a in the heating heat exchanger 5 are connected in a closed loop through the heat medium path L23, and the heat medium heated by the heating heat exchanger 5 is heated to a high temperature. It flows into the first heat radiating device 4a.

熱媒体経路Ｌ２３には、熱媒体の温度上昇に伴う膨張分を吸収可能な容積を持つ膨張タンク１０１、熱媒体の流れを発生させる熱媒体循環ポンプ８１、第２通路部５２に流入する熱媒体の温度を検出するサーミスタ等の温度センサ９５、第２通路部５２から流出する熱媒体の温度を検出するサーミスタ等の温度センサ９６が配置されている。膨張タンク１０１には、熱媒体経路Ｌ２３内の圧力が所定圧以上になると開弁して熱媒体経路Ｌ２３内の熱媒体を外部に逃がすリリーフ弁（図示せず）が内蔵されている。   In the heat medium path L23, the expansion tank 101 having a volume capable of absorbing the expansion due to the temperature rise of the heat medium, the heat medium circulation pump 81 that generates the flow of the heat medium, and the heat medium flowing into the second passage portion 52 A temperature sensor 95 such as a thermistor for detecting the temperature of the heat sensor and a temperature sensor 96 such as a thermistor for detecting the temperature of the heat medium flowing out from the second passage portion 52 are disposed. The expansion tank 101 incorporates a relief valve (not shown) that opens when the pressure in the heat medium path L23 exceeds a predetermined pressure and releases the heat medium in the heat medium path L23 to the outside.

熱媒体経路Ｌ２３における熱媒体循環ポンプ８１の下流側部位から低温熱媒体経路Ｌ２４が分岐されており、第１放熱機器４ａにより放熱して温度が低下した熱媒体が、低温熱媒体経路Ｌ２４を介して第２放熱機器４ｂに流入するようになっている。   The low-temperature heat medium path L24 is branched from the downstream side portion of the heat medium circulation pump 81 in the heat medium path L23, and the heat medium radiated by the first heat radiating device 4a and the temperature is lowered passes through the low-temperature heat medium path L24. And flows into the second heat radiating device 4b.

熱媒体経路Ｌ２３における第２通路部５２の下流側部位から高温熱媒体経路Ｌ２５が分岐され、この高温熱媒体経路Ｌ２５は低温熱媒体経路Ｌ２４に接続されている。そして、加熱用熱交換器５で加熱されて高温になった熱媒体が、高温熱媒体経路Ｌ２５および低温熱媒体経路Ｌ２４を介して第２放熱機器４ｂに流入するようになっている。   The high temperature heat medium path L25 is branched from the downstream side portion of the second passage portion 52 in the heat medium path L23, and the high temperature heat medium path L25 is connected to the low temperature heat medium path L24. Then, the heat medium heated to the high temperature by the heat exchanger 5 for heating flows into the second heat radiating device 4b through the high temperature heat medium path L25 and the low temperature heat medium path L24.

低温熱媒体経路Ｌ２４と高温熱媒体経路Ｌ２５の合流部には、第２放熱機器４ｂに流入する熱媒体の温度が所定温度になるように、低温熱媒体と高温熱媒体の混合割合を調整する熱媒体混合弁７５が配置されている。   The mixing ratio of the low-temperature heat medium and the high-temperature heat medium is adjusted at the junction of the low-temperature heat medium path L24 and the high-temperature heat medium path L25 so that the temperature of the heat medium flowing into the second heat radiating device 4b becomes a predetermined temperature. A heat medium mixing valve 75 is arranged.

第２放熱機器４ｂの熱媒体出口側は、熱媒体排出経路Ｌ２６を介して、熱媒体経路Ｌ２３における第１放熱機器４ａの下流側に接続されている。   The heat medium outlet side of the second heat dissipation device 4b is connected to the downstream side of the first heat dissipation device 4a in the heat medium path L23 via the heat medium discharge path L26.

加熱用熱交換器５における第３通路部５３と風呂１００は、風呂水経路Ｌ２７にて閉ループに接続されており、第１通路部５１の温水と第３通路部５３の風呂水との熱交換により、風呂水の追い焚きが可能になっている。   The third passage portion 53 and the bath 100 in the heat exchanger 5 for heating are connected in a closed loop by a bath water path L27, and heat exchange between the hot water in the first passage portion 51 and the bath water in the third passage portion 53 is performed. This makes it possible to recharge bath water.

図示しない制御装置には、流量計１７、温度センサ９０ａ〜９０ｆ、９１〜９６、および図示しない操作盤に設けられた操作スイッチからの信号が入力される。また、その制御装置は、それらの信号などに基づいて、電動送風機１２、各種弁１５、１６、７０〜７５、およびポンプ８０、８１に制御信号を出力して、それらの各機器を制御するように構成されている。   A control device (not shown) receives signals from the flow meter 17, temperature sensors 90a to 90f, 91 to 96, and operation switches provided on an operation panel (not shown). Further, the control device outputs control signals to the electric blower 12, the various valves 15, 16, 70 to 75, and the pumps 80 and 81 based on those signals and the like so as to control those devices. It is configured.

次に、本実施形態の給湯装置の作動を説明する。   Next, the operation of the hot water supply apparatus of this embodiment will be described.

まず、浴室乾燥を行う場合、床暖房を行う場合、或いは風呂水の追い焚きを行う場合は、加熱用熱交換器５における第１通路部５１に温水を循環させる。   First, when performing bathroom drying, when performing floor heating, or when performing bath water replenishment, warm water is circulated through the first passage portion 51 in the heat exchanger 5 for heating.

このとき、貯湯タンク３の上部の温水の温度が所定温度を超えており、且つ貯湯タンク３内の温水の総熱量が所定熱量を超えている場合は、貯湯タンク３内の温水が以下のようにして供給される。   At this time, when the temperature of the hot water in the upper part of the hot water storage tank 3 exceeds a predetermined temperature and the total heat quantity of the hot water in the hot water storage tank 3 exceeds the predetermined heat quantity, the hot water in the hot water storage tank 3 is as follows. Supplied.

すなわち、温水循環ポンプ８０を作動させ、絞り弁７０にて燃焼機給水経路Ｌ１４を閉じ、給湯経路切換弁７１にて上部給湯経路Ｌ１２と燃焼機給湯経路Ｌ１５とを連通させ、循環経路切換弁７４にて出口側共通循環経路Ｌ２０とタンク循環経路Ｌ２２とを連通させる。これにより、貯湯タンク３内の温水は、上部給湯経路Ｌ１２、燃焼機給湯経路Ｌ１５、および入口側共通循環経路Ｌ１９を介して第１通路部５１に供給され、さらに、出口側共通循環経路Ｌ２０およびタンク循環経路Ｌ２２を介して貯湯タンク３に戻される。   That is, the hot water circulation pump 80 is operated, the combustor water supply path L14 is closed by the throttle valve 70, the upper hot water supply path L12 and the combustor hot water supply path L15 are connected by the hot water supply path switching valve 71, and the circulation path switching valve 74 is connected. The outlet side common circulation path L20 and the tank circulation path L22 are communicated with each other. Thus, the hot water in the hot water storage tank 3 is supplied to the first passage portion 51 via the upper hot water supply path L12, the combustor hot water supply path L15, and the inlet side common circulation path L19, and further, the outlet side common circulation path L20 and It returns to the hot water storage tank 3 through the tank circulation path L22.

一方、貯湯タンク３の上部の温水の温度が所定温度以下の場合、または貯湯タンク３内の温水の総熱量が所定熱量以下の場合は、燃焼機１により加熱された温水が以下のようにして供給される。   On the other hand, when the temperature of the hot water in the upper part of the hot water storage tank 3 is lower than a predetermined temperature, or when the total amount of heat of the hot water in the hot water storage tank 3 is lower than the predetermined heat amount, the hot water heated by the combustor 1 is as follows. Supplied.

すなわち、温水循環ポンプ８０を作動させ、絞り弁７０にて燃焼機給水経路Ｌ１４を閉じ、循環経路切換弁７４にて出口側共通循環経路Ｌ２０と燃焼機循環経路Ｌ２１とを連通させる。これにより、燃焼機１により加熱された温水は、燃焼機給湯経路Ｌ１５および入口側共通循環経路Ｌ１９を介して第１通路部５１に供給され、さらに、出口側共通循環経路Ｌ２０、燃焼機循環経路Ｌ２１および燃焼機給水経路Ｌ１４を介して燃焼機１に戻される。   That is, the hot water circulation pump 80 is operated, the combustor water supply path L14 is closed by the throttle valve 70, and the outlet-side common circulation path L20 and the combustor circulation path L21 are communicated by the circulation path switching valve 74. Thus, the hot water heated by the combustor 1 is supplied to the first passage 51 via the combustor hot water supply path L15 and the inlet-side common circulation path L19, and further, the outlet-side common circulation path L20, the combustor circulation path. It returns to the combustor 1 through L21 and the combustor water supply path L14.

そして、第１通路部５１に温水が供給されている状態で、熱媒体循環ポンプ８１を作動させると、加熱用熱交換器５で加熱されて高温になった熱媒体が第１放熱機器４ａに流入して浴室乾燥が行われ、熱媒体混合弁７５により所定温度に調整された熱媒体が第２放熱機器４ｂに流入して床暖房が行われる。また、第１通路部５１の温水と第３通路部５３の風呂水との熱交換により、風呂水の追い焚きが行われる。   Then, when the heat medium circulation pump 81 is operated in a state where the hot water is supplied to the first passage portion 51, the heat medium heated by the heating heat exchanger 5 and heated to the first heat radiating device 4a. After flowing in, bathroom drying is performed, and the heat medium adjusted to a predetermined temperature by the heat medium mixing valve 75 flows into the second heat radiating device 4b to perform floor heating. Further, the bath water is replenished by heat exchange between the hot water in the first passage portion 51 and the bath water in the third passage portion 53.

次に、台所・洗面所・浴室などの給湯部に温水を供給する場合は、貯湯タンク３内の温水または燃焼機１により加熱された温水が以下のようにして供給される。   Next, when hot water is supplied to hot water supply units such as kitchens, washrooms, and bathrooms, hot water in the hot water storage tank 3 or hot water heated by the combustor 1 is supplied as follows.

すなわち、貯湯タンク３の上部の温水の温度が所定温度を超えており、且つ貯湯タンク３内の温水の総熱量が所定熱量を超えている場合は、絞り弁７０にて燃焼機給水経路Ｌ１４を閉じ、給湯経路切換弁７１にて上部給湯経路Ｌ１２と共通給湯経路Ｌ１３とを連通させる。これにより、貯湯タンク３内の温水は、上部給湯経路Ｌ１２および共通給湯経路Ｌ１３を介して給湯部に供給される。   That is, when the temperature of the hot water in the upper part of the hot water storage tank 3 exceeds a predetermined temperature and the total heat quantity of the hot water in the hot water storage tank 3 exceeds the predetermined heat quantity, the throttle valve 70 causes the combustor water supply path L14 to pass. The upper hot water supply path L12 and the common hot water supply path L13 are communicated with each other by the hot water supply path switching valve 71. Thereby, the hot water in the hot water storage tank 3 is supplied to the hot water supply section through the upper hot water supply path L12 and the common hot water supply path L13.

一方、貯湯タンク３の上部の温水の温度が所定温度以下の場合、または貯湯タンク３内の温水の総熱量が所定熱量以下の場合は、絞り弁７０が燃焼機給水経路Ｌ１４を開き、給湯経路切換弁７１にて燃焼機給湯経路Ｌ１５と共通給湯経路Ｌ１３とを連通させる。これにより、燃焼機給水経路Ｌ１４を介して燃焼機１に水道水が導かれ、その水道水は燃焼機１にて加熱された後に燃焼機給湯経路Ｌ１５および共通給湯経路Ｌ１３を介して給湯部に供給される。   On the other hand, when the temperature of the hot water in the upper part of the hot water storage tank 3 is equal to or lower than the predetermined temperature, or when the total heat quantity of the hot water in the hot water storage tank 3 is equal to or lower than the predetermined heat quantity, the throttle valve 70 opens the combustor water supply path L14. The switching valve 71 causes the combustor hot water supply path L15 and the common hot water supply path L13 to communicate with each other. Thereby, tap water is led to the combustor 1 through the combustor water supply path L14, and the tap water is heated by the combustor 1 and then supplied to the hot water supply unit through the combustor hot water supply path L15 and the common hot water supply path L13. Supplied.

以上述べたように、本実施形態では、加熱用熱交換器５における第１通路部５１に貯湯タンク３内の温水を供給する場合および第１通路部５１に燃焼機１にて加熱された温水を供給する場合のいずれにおいても、１つの温水循環ポンプ８０で温水の流れを発生させることができるため、装置の複雑化を回避することができる。   As described above, in the present embodiment, when the hot water in the hot water storage tank 3 is supplied to the first passage portion 51 in the heating heat exchanger 5, and the hot water heated by the combustor 1 to the first passage portion 51. In any case, the flow of hot water can be generated by one hot water circulation pump 80, so that the apparatus can be prevented from becoming complicated.

また、熱媒体や風呂水と熱交換して温度が低下した温水が温水循環ポンプ８０および循環経路切換弁７４を流通するため、温水循環ポンプ８０および循環経路切換弁７４の使用環境温度が下がり、温水循環ポンプ８０および循環経路切換弁７４の劣化が抑制される。   Further, since the hot water whose temperature has been reduced by exchanging heat with the heat medium or bath water flows through the hot water circulation pump 80 and the circulation path switching valve 74, the use environment temperature of the hot water circulation pump 80 and the circulation path switching valve 74 is reduced. Deterioration of the hot water circulation pump 80 and the circulation path switching valve 74 is suppressed.

また、貯湯タンク３の上部の温水の温度が所定温度以下の場合、または貯湯タンク３内の温水の総熱量が所定熱量以下の場合、換言すると貯湯タンク３内の温水で暖房や給湯を行うことができない状況下でも、燃焼機１で加熱した温水により暖房や給湯を行うことができる。   In addition, when the temperature of the hot water in the upper part of the hot water storage tank 3 is lower than the predetermined temperature, or when the total heat quantity of the hot water in the hot water storage tank 3 is lower than the predetermined heat quantity, in other words, heating or hot water supply is performed with the hot water in the hot water storage tank 3. Even in a situation where it is not possible to perform heating or hot water supply, the hot water heated by the combustor 1 can be used.

また、燃焼機給水経路Ｌ１４と燃焼機循環経路Ｌ２１は、合流して燃焼機１の入口側に接続されているため、貯湯タンク３内が空でも燃焼機１にて温水を得ることができる。   Moreover, since the combustor water supply path L14 and the combustor circulation path L21 merge and are connected to the inlet side of the combustor 1, hot water can be obtained by the combustor 1 even when the hot water storage tank 3 is empty.

（第２実施形態）
本発明の第２実施形態について説明する。図２は本実施形態に係る給湯装置の構成を示す模式図である。第１実施形態と同一もしくは均等部分には同一の符号を付し、その説明を省略する。 (Second Embodiment)
A second embodiment of the present invention will be described. FIG. 2 is a schematic diagram showing the configuration of the hot water supply apparatus according to this embodiment. The same or equivalent parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

本実施形態の給湯装置は、第１実施形態の給湯装置における逆止弁６１、絞り弁７０、および給湯経路切換弁７１が廃止されている。   In the hot water supply apparatus of this embodiment, the check valve 61, the throttle valve 70, and the hot water supply path switching valve 71 in the hot water supply apparatus of the first embodiment are eliminated.

図２に示すように、第１実施形態において上部給湯経路Ｌ１２に配置されていた逃がし弁６２は、本実施形態では燃焼機給湯経路Ｌ１５に配置されている。上部給湯経路Ｌ１２には、燃焼機給湯経路Ｌ１５から貯湯タンク３への温水の流れを阻止する給湯経路逆止弁６４が配置されている。   As shown in FIG. 2, the relief valve 62 arranged in the upper hot water supply path L12 in the first embodiment is arranged in the combustor hot water supply path L15 in the present embodiment. In the upper hot water supply path L12, a hot water supply path check valve 64 that blocks the flow of hot water from the combustor hot water supply path L15 to the hot water storage tank 3 is disposed.

貯湯タンク３における上下方向中間部と共通給湯経路Ｌ１３が中温水給湯経路Ｌ２８にて連通されており、貯湯タンク３における上下方向中間部の温水が中温水給湯経路Ｌ２８を介して共通給湯経路Ｌ１３に導かれるようになっている。   The intermediate portion in the vertical direction in the hot water storage tank 3 and the common hot water supply path L13 are communicated with each other through the intermediate hot water hot water supply route L28, and the hot water in the intermediate portion in the vertical direction in the hot water storage tank 3 passes through the intermediate hot water hot water supply route L28. It has come to be guided.

共通給湯経路Ｌ１３と中温水給湯経路Ｌ２８との合流部には、燃焼機給湯経路Ｌ１５および上部給湯経路Ｌ１２から給湯部に流れる温水と中温水給湯経路Ｌ２８から給湯部に流れる温水の流量比を調整する中温水混合弁７６が配置されている。   The flow rate ratio of the hot water flowing from the combustor hot water supply route L15 and the upper hot water supply route L12 to the hot water supply unit and the hot water flowing from the intermediate hot water supply route L28 to the hot water supply unit is adjusted at the junction of the common hot water supply route L13 and the intermediate hot water hot water supply route L28. An intermediate warm water mixing valve 76 is arranged.

共通給湯経路Ｌ１３のうち中温水混合弁７６よりも下流側には、中温水混合弁７６を通過後の温水の温度を検出するサーミスタ等の温度センサ９７が配置されている。   A temperature sensor 97 such as a thermistor for detecting the temperature of the hot water after passing through the intermediate hot water mixing valve 76 is disposed downstream of the intermediate hot water mixing valve 76 in the common hot water supply path L13.

燃焼機給水経路Ｌ１４には、燃焼機１から給水源側への水の流れを阻止する給水経路逆止弁６５が配置されている。タンク給水経路Ｌ１１には、タンク給水経路Ｌ１１を流れる水道水の流量を調整する絞り弁７７が配置されている。   A water supply path check valve 65 for blocking the flow of water from the combustor 1 to the water supply source side is disposed in the combustor water supply path L14. A throttle valve 77 that adjusts the flow rate of tap water flowing through the tank water supply path L11 is disposed in the tank water supply path L11.

図示しない制御装置には、温度センサ９７の信号も入力される。また、その制御装置は、中温水混合弁７６および絞り弁７７にも制御信号を出力するように構成されている。   A signal from the temperature sensor 97 is also input to a control device (not shown). The control device is also configured to output control signals to the intermediate hot water mixing valve 76 and the throttle valve 77.

次に、本実施形態の給湯装置の作動を説明する。   Next, the operation of the hot water supply apparatus of this embodiment will be described.

まず、浴室乾燥を行う場合、床暖房を行う場合、或いは風呂水の追い焚きを行うために、加熱用熱交換器５における第１通路部５１に温水を循環させる。   First, when performing bathroom drying, when performing floor heating, or reheating bath water, hot water is circulated through the first passage portion 51 in the heat exchanger 5 for heating.

このとき、貯湯タンク３の上部の温水の温度が所定温度を超えており、且つ貯湯タンク３内の温水の総熱量が所定熱量を超えている場合は、貯湯タンク３内の温水が以下のようにして供給される。   At this time, when the temperature of the hot water in the upper part of the hot water storage tank 3 exceeds a predetermined temperature and the total heat quantity of the hot water in the hot water storage tank 3 exceeds the predetermined heat quantity, the hot water in the hot water storage tank 3 is as follows. Supplied.

すなわち、温水循環ポンプ８０を作動させ、絞り弁７７にてタンク給水経路Ｌ１１を閉じ、循環経路切換弁７４にて出口側共通循環経路Ｌ２０とタンク循環経路Ｌ２２とを連通させる。これにより、貯湯タンク３内の温水は、上部給湯経路Ｌ１２、燃焼機給湯経路Ｌ１５、および入口側共通循環経路Ｌ１９を介して第１通路部５１に供給され、さらに、出口側共通循環経路Ｌ２０およびタンク循環経路Ｌ２２を介して貯湯タンク３に戻される。   That is, the hot water circulation pump 80 is operated, the tank water supply path L11 is closed by the throttle valve 77, and the outlet side common circulation path L20 and the tank circulation path L22 are communicated by the circulation path switching valve 74. Thus, the hot water in the hot water storage tank 3 is supplied to the first passage portion 51 via the upper hot water supply path L12, the combustor hot water supply path L15, and the inlet side common circulation path L19, and further, the outlet side common circulation path L20 and It returns to the hot water storage tank 3 through the tank circulation path L22.

一方、貯湯タンク３の上部の温水の温度が所定温度以下の場合、または貯湯タンク３内の温水の総熱量が所定熱量以下の場合は、燃焼機１により加熱された温水が以下のようにして供給される。   On the other hand, when the temperature of the hot water in the upper part of the hot water storage tank 3 is lower than a predetermined temperature, or when the total amount of heat of the hot water in the hot water storage tank 3 is lower than the predetermined heat amount, the hot water heated by the combustor 1 is as follows. Supplied.

すなわち、温水循環ポンプ８０を作動させ、絞り弁７７にてタンク給水経路Ｌ１１を閉じ、循環経路切換弁７４にて出口側共通循環経路Ｌ２０と燃焼機循環経路Ｌ２１とを連通させる。これにより、燃焼機１により加熱された温水は、燃焼機給湯経路Ｌ１５および入口側共通循環経路Ｌ１９を介して第１通路部５１に供給され、さらに、出口側共通循環経路Ｌ２０、燃焼機循環経路Ｌ２１および燃焼機給水経路Ｌ１４を介して燃焼機１に戻される。   That is, the hot water circulation pump 80 is operated, the tank water supply path L11 is closed by the throttle valve 77, and the outlet side common circulation path L20 and the combustor circulation path L21 are communicated by the circulation path switching valve 74. Thus, the hot water heated by the combustor 1 is supplied to the first passage 51 via the combustor hot water supply path L15 and the inlet-side common circulation path L19, and further, the outlet-side common circulation path L20, the combustor circulation path. It returns to the combustor 1 through L21 and the combustor water supply path L14.

このとき、給湯経路逆止弁６４により、燃焼機１で加熱した温水が燃焼機給湯経路Ｌ１５および上部給湯経路Ｌ１２を介して貯湯タンク３に流入するのを防止できる。また、給水経路逆止弁６５により、燃焼機１に戻される低温の温水が燃焼機給水経路Ｌ１４およびタンク給水経路Ｌ１１を介して貯湯タンク３に流入するのを防止できる。   At this time, the hot water supply check valve 64 can prevent the hot water heated by the combustor 1 from flowing into the hot water storage tank 3 through the combustor hot water supply path L15 and the upper hot water supply path L12. Moreover, the low temperature warm water returned to the combustor 1 can be prevented from flowing into the hot water storage tank 3 through the combustor water supply path L14 and the tank water supply path L11 by the water supply path check valve 65.

次に、台所・洗面所・浴室などの給湯部に温水を供給する場合は、貯湯タンク３内の温水または燃焼機１により加熱された温水が以下のようにして供給される。   Next, when hot water is supplied to hot water supply units such as kitchens, washrooms, and bathrooms, hot water in the hot water storage tank 3 or hot water heated by the combustor 1 is supplied as follows.

すなわち、貯湯タンク３の上部の温水の温度が所定温度を超えており、且つ貯湯タンク３内の温水の総熱量が所定熱量を超えている場合は、絞り弁７７がタンク給水経路Ｌ１１を開く。これにより、貯湯タンク３内の上部の温水（高温水）は、上部給湯経路Ｌ１２および共通給湯経路Ｌ１３を介して給湯部に供給され、貯湯タンク３における上下方向中間部の温水（中温水）は、中温水給湯経路Ｌ２８および共通給湯経路Ｌ１３を介して給湯部に供給される。この際、中温水混合弁７６により高温水と中温水の流量比が調整される。   That is, when the temperature of the hot water in the upper part of the hot water storage tank 3 exceeds a predetermined temperature and the total heat quantity of the hot water in the hot water storage tank 3 exceeds the predetermined heat quantity, the throttle valve 77 opens the tank water supply path L11. Thereby, the hot water (hot water) in the upper part in the hot water storage tank 3 is supplied to the hot water supply part via the upper hot water supply path L12 and the common hot water supply path L13, and the warm water (medium hot water) in the middle in the vertical direction in the hot water storage tank 3 is Then, the hot water supply section L28 and the common hot water supply path L13 are supplied to the hot water supply section. At this time, the flow rate ratio between the high temperature water and the medium temperature water is adjusted by the medium temperature water mixing valve 76.

一方、貯湯タンク３の上部の温水の温度が所定温度以下の場合、または貯湯タンク３内の温水の総熱量が所定熱量以下の場合は、絞り弁７７にてタンク給水経路Ｌ１１を閉じる。これにより、燃焼機給水経路Ｌ１４を介して燃焼機１に水道水が導かれ、その水道水は燃焼機１にて加熱された後に燃焼機給湯経路Ｌ１５および共通給湯経路Ｌ１３を介して給湯部に供給される。このとき、給湯経路逆止弁６４により、燃焼機１で加熱した温水が燃焼機給湯経路Ｌ１５および上部給湯経路Ｌ１２を介して貯湯タンク３に流入するのを防止できる。   On the other hand, when the temperature of the hot water in the upper part of the hot water storage tank 3 is lower than the predetermined temperature, or when the total heat quantity of the hot water in the hot water storage tank 3 is lower than the predetermined heat quantity, the tank water supply path L11 is closed by the throttle valve 77. Thereby, tap water is led to the combustor 1 through the combustor water supply path L14, and the tap water is heated by the combustor 1 and then supplied to the hot water supply unit through the combustor hot water supply path L15 and the common hot water supply path L13. Supplied. At this time, the hot water supply check valve 64 can prevent the hot water heated by the combustor 1 from flowing into the hot water storage tank 3 through the combustor hot water supply path L15 and the upper hot water supply path L12.

（第３実施形態）
本発明の第３実施形態について説明する。図３は本実施形態に係る給湯装置の構成を示す模式図である。第１実施形態と同一もしくは均等部分には同一の符号を付し、その説明を省略する。 (Third embodiment)
A third embodiment of the present invention will be described. FIG. 3 is a schematic diagram showing the configuration of the hot water supply apparatus according to this embodiment. The same or equivalent parts as those in the first embodiment are denoted by the same reference numerals, and the description thereof is omitted.

第１実施形態の給湯装置では、燃焼機給水経路Ｌ１４により燃焼機１の熱交換器１４に水道水を導くようにしたが、本実施形態の給湯装置は、図３に示すように、貯湯タンク３における上下方向中間部と燃焼機１の熱交換器１４が燃焼機給水経路Ｌ１４にて連通されており、貯湯タンク３における上下方向中間部の温水が燃焼機給水経路Ｌ１４を介して燃焼機１の熱交換器１４に導かれるようになっている。燃焼機給水経路Ｌ１４には、燃焼機１から貯湯タンク３への温水の流れを阻止する給水経路逆止弁６６が配置されている。   In the hot water supply apparatus of the first embodiment, tap water is guided to the heat exchanger 14 of the combustor 1 by the combustor water supply path L14. However, the hot water supply apparatus of the present embodiment is a hot water storage tank as shown in FIG. 3 and the heat exchanger 14 of the combustor 1 are communicated with each other through a combustor water supply path L14, and the hot water in the vertical middle part of the hot water storage tank 3 is connected to the combustor 1 via the combustor water supply path L14. The heat exchanger 14 is led. A water supply path check valve 66 that blocks the flow of hot water from the combustor 1 to the hot water storage tank 3 is disposed in the combustor water supply path L14.

共通給湯経路Ｌ１３および温調用給水経路Ｌ１６は、ともに分岐されている。そして、第１共通給湯経路Ｌ１３ａと第１温調用給水経路Ｌ１６ａの合流部には、台所・洗面所の給湯部に供給する温水の温度が所定温度になるように温水と水道水の混合割合を調整する第１湯水混合弁７２ａが配置され、第２共通給湯経路Ｌ１３ｂと第２温調用給水経路Ｌ１６ｂの合流部には、浴室の給湯部に供給する温水の温度が所定温度になるように温水と水道水の混合割合を調整する第２湯水混合弁７２ｂが配置されている。   The common hot water supply path L13 and the temperature adjustment water supply path L16 are both branched. The mixing ratio of the first common hot water supply path L13a and the first temperature adjustment water supply path L16a is set to a mixing ratio of hot water and tap water so that the temperature of the hot water supplied to the hot water supply section of the kitchen / toilet becomes a predetermined temperature. The first hot water mixing valve 72a to be adjusted is disposed, and the hot water supplied to the hot water supply section of the bathroom is at a predetermined temperature at the junction of the second common hot water supply path L13b and the second temperature adjustment water supply path L16b. And a second hot water mixing valve 72b for adjusting the mixing ratio of the tap water.

次に、本実施形態の給湯装置の作動を説明する。   Next, the operation of the hot water supply apparatus of this embodiment will be described.

台所・洗面所・浴室などの給湯部に温水を供給する場合は、貯湯タンク３内の温水または燃焼機１により加熱された温水が以下のようにして供給される。   When hot water is supplied to hot water supply units such as kitchens, washrooms, and bathrooms, hot water in the hot water storage tank 3 or hot water heated by the combustor 1 is supplied as follows.

すなわち、貯湯タンク３の上部の温水の温度が所定温度を超えており、且つ貯湯タンク３内の温水の総熱量が所定熱量を超えている場合は、第１実施形態と同様にして給湯部に供給される。   That is, when the temperature of the hot water in the upper part of the hot water storage tank 3 exceeds a predetermined temperature and the total heat quantity of the hot water in the hot water storage tank 3 exceeds the predetermined heat quantity, the hot water supply section is set in the same manner as in the first embodiment. Supplied.

一方、貯湯タンク３の上部の温水の温度が所定温度以下の場合、または貯湯タンク３内の温水の総熱量が所定熱量以下の場合は、絞り弁７０が燃焼機給水経路Ｌ１４を開き、給湯経路切換弁７１にて燃焼機給湯経路Ｌ１５と共通給湯経路Ｌ１３とを連通させる。これにより、貯湯タンク３における上下方向中間部の温水（中温水）が燃焼機給水経路Ｌ１４を介して燃焼機１の熱交換器１４に導かれ、その中温水は燃焼機１にて加熱された後に燃焼機給湯経路Ｌ１５および共通給湯経路Ｌ１３を介して給湯部に供給される。   On the other hand, when the temperature of the hot water in the upper part of the hot water storage tank 3 is equal to or lower than the predetermined temperature, or when the total heat quantity of the hot water in the hot water storage tank 3 is equal to or lower than the predetermined heat quantity, the throttle valve 70 opens the combustor water supply path L14. The switching valve 71 causes the combustor hot water supply path L15 and the common hot water supply path L13 to communicate with each other. Thereby, the warm water (intermediate warm water) in the vertical direction in the hot water storage tank 3 is guided to the heat exchanger 14 of the combustor 1 through the combustor water supply path L14, and the medium warm water is heated by the combustor 1. Later, it is supplied to the hot water supply section via the combustor hot water supply path L15 and the common hot water supply path L13.

ところで、貯湯タンク３における上下方向中間部の温水をヒートポンプ２で加熱する際のヒートポンプ２の効率は、貯湯タンク３の下部の温水（低温水）をヒートポンプ２で加熱する際のヒートポンプ２の効率よりも低い。   By the way, the efficiency of the heat pump 2 when heating the hot water in the middle in the vertical direction in the hot water storage tank 3 with the heat pump 2 is higher than the efficiency of the heat pump 2 when heating the hot water (low temperature water) in the lower part of the hot water storage tank 3 with the heat pump 2. Is also low.

そこで、中温水を燃焼機１で加熱して給湯に利用し、その後貯湯タンク３の下部の低温水をヒートポンプ２で加熱することにより、ヒートポンプ２を効率の高い領域で運転させることができる。   Therefore, the heat pump 2 can be operated in a highly efficient region by heating the medium temperature water with the combustor 1 and using it for hot water supply, and then heating the low temperature water below the hot water storage tank 3 with the heat pump 2.

本発明の第１実施形態に係る給湯装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the hot water supply apparatus which concerns on 1st Embodiment of this invention. 本発明の第２実施形態に係る給湯装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the hot water supply apparatus which concerns on 2nd Embodiment of this invention. 本発明の第３実施形態に係る給湯装置の構成を示す模式図である。It is a schematic diagram which shows the structure of the hot water supply apparatus which concerns on 3rd Embodiment of this invention.

符号の説明Explanation of symbols

１…燃焼機、２…ヒートポンプ、３…貯湯タンク、４ａ、４ｂ…放熱機器、
５…加熱用熱交換器、７４…循環経路切換弁、８０…温水循環ポンプ、Ｌ１９、Ｌ２０…共通循環経路、Ｌ２１…燃焼機循環経路、Ｌ２２…タンク循環経路。 DESCRIPTION OF SYMBOLS 1 ... Combustor, 2 ... Heat pump, 3 ... Hot water storage tank, 4a, 4b ... Radiation equipment,
5 ... Heat exchanger for heating, 74 ... Circulation path switching valve, 80 ... Hot water circulation pump, L19, L20 ... Common circulation path, L21 ... Combustor circulation path, L22 ... Tank circulation path.

Claims (13)

燃料を燃焼させて水を加熱する燃焼機（１）と、水を加熱するヒートポンプ（２）と、前記ヒートポンプ（２）にて加熱された温水を蓄える貯湯タンク（３）とを備える給湯装置において、
熱媒体の放熱により暖房を行う放熱機器（４ａ、４ｂ）と、
前記燃焼機（１）にて加熱された温水および前記貯湯タンク（３）に蓄えられた温水が選択的に流通して、その温水と前記熱媒体との間で熱交換を行う加熱用熱交換器（５）と、
前記燃焼機（１）および前記貯湯タンク（３）と前記加熱用熱交換器（５）との間で温水を循環させる循環経路（Ｌ１９〜Ｌ２２）とを備え、
前記循環経路（Ｌ１９〜Ｌ２２）は、前記燃焼機（１）に接続された燃焼機循環経路（Ｌ２１）と、前記貯湯タンク（３）に接続されたタンク循環経路（Ｌ２２）と、前記燃焼機循環経路（Ｌ２１）と前記タンク循環経路（Ｌ２２）とを合流させて前記加熱用熱交換器（５）に接続された共通循環経路（Ｌ２０）とを備え、
さらに、前記共通循環経路（Ｌ２０）に配置されて温水の流れを発生させる温水循環ポンプ（８０）と、
前記共通循環経路（Ｌ２０）を前記燃焼機循環経路（Ｌ２１）および前記タンク循環経路（Ｌ２２）に選択的に連通させる循環経路切換弁（７４）とを備えることを特徴とする給湯装置。 In a hot water supply apparatus comprising a combustor (1) that burns fuel to heat water, a heat pump (2) that heats water, and a hot water storage tank (3) that stores hot water heated by the heat pump (2) ,
A heat dissipating device (4a, 4b) for heating by heat radiation of the heat medium;
Heat exchange for heating in which hot water heated in the combustor (1) and hot water stored in the hot water storage tank (3) are selectively circulated to exchange heat between the hot water and the heat medium. Vessel (5),
A circulation path (L19 to L22) for circulating hot water between the combustor (1) and the hot water storage tank (3) and the heat exchanger (5) for heating;
The circulation path (L19 to L22) includes a combustion machine circulation path (L21) connected to the combustor (1), a tank circulation path (L22) connected to the hot water storage tank (3), and the combustor. A common circulation path (L20) connected to the heating heat exchanger (5) by joining the circulation path (L21) and the tank circulation path (L22);
And a hot water circulation pump (80) disposed in the common circulation path (L20) to generate a flow of hot water;
A hot water supply apparatus comprising: a circulation path switching valve (74) for selectively communicating the common circulation path (L20) with the combustor circulation path (L21) and the tank circulation path (L22). 前記共通循環経路は、前記加熱用熱交換器（５）の入口側に接続された入口側共通循環経路（Ｌ１９）と、前記加熱用熱交換器（５）の出口側に接続された出口側共通循環経路（Ｌ２０）とを備え、
前記温水循環ポンプ（８０）は、前記出口側共通循環経路（Ｌ２０）に配置され、
前記循環経路切換弁（７４）は、前記出口側共通循環経路（Ｌ２０）と前記燃焼機循環経路（Ｌ２１）と前記タンク循環経路（Ｌ２２）との接続部に配置されていることを特徴とする請求項１に記載の給湯装置。 The common circulation path includes an inlet-side common circulation path (L19) connected to the inlet side of the heating heat exchanger (5) and an outlet side connected to the outlet side of the heating heat exchanger (5). A common circulation path (L20),
The hot water circulation pump (80) is disposed in the outlet-side common circulation path (L20),
The circulation path switching valve (74) is arranged at a connection portion of the outlet side common circulation path (L20), the combustor circulation path (L21), and the tank circulation path (L22). The hot water supply apparatus according to claim 1. 前記循環経路切換弁（７４）は、前記貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および前記貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、前記共通循環経路（Ｌ２０）を前記燃焼機循環経路（Ｌ２１）に連通させることを特徴とする請求項１または２に記載の給湯装置。 When the temperature of the hot water in the upper part of the hot water storage tank (3) is equal to or lower than the predetermined temperature, and the total heat amount of the hot water in the hot water storage tank (3) is equal to or lower than the predetermined heat amount, the circulation path switching valve (74) The hot water supply device according to claim 1 or 2, wherein the common circulation path (L20) communicates with the combustor circulation path (L21). 給水源から前記燃焼機（１）に水を導く燃焼機給水経路（Ｌ１４）を備え、
前記燃焼機給水経路（Ｌ１４）および前記燃焼機循環経路（Ｌ２１）は、合流して前記燃焼機（１）の入口側に接続されていることを特徴とする請求項１ないし３のいずれか１つに記載の給湯装置。 Combustor water supply path (L14) for guiding water from a water supply source to the combustor (1),
The combustor water supply path (L14) and the combustor circulation path (L21) merge and are connected to the inlet side of the combustor (1). Hot water supply device described in one. 前記燃焼機（１）にて加熱された温水が流通する燃焼機給湯経路（Ｌ１５）と、
前記貯湯タンク（３）の上部の温水が流通する上部給湯経路（Ｌ１２）と、
前記燃焼機給湯経路（Ｌ１５）および前記上部給湯経路（Ｌ１２）に接続されて給湯部に温水を導く共通給湯経路（Ｌ１３）と、
前記燃焼機給湯経路（Ｌ１５）および前記上部給湯経路（Ｌ１２）を前記共通給湯経路（Ｌ１３）に選択的に連通させる給湯経路切換弁（７１）とを備えることを特徴とする請求項１ないし４のいずれか１つに記載の給湯装置。 A combustor hot water supply path (L15) through which hot water heated by the combustor (1) flows;
An upper hot water supply path (L12) through which hot water in the upper part of the hot water storage tank (3) flows;
A common hot water supply path (L13) connected to the combustor hot water supply path (L15) and the upper hot water supply path (L12) to guide hot water to the hot water supply section;
A hot water supply path switching valve (71) for selectively communicating the combustor hot water supply path (L15) and the upper hot water supply path (L12) with the common hot water supply path (L13). The hot water supply apparatus as described in any one of these. 前記給湯経路切換弁（７１）は、前記貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および前記貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、前記燃焼機給湯経路（Ｌ１５）を前記共通給湯経路（Ｌ１３）に連通させることを特徴とする請求項５に記載の給湯装置。 When the temperature of the hot water in the upper part of the hot water storage tank (3) is equal to or lower than the predetermined temperature, and the total heat quantity of the hot water in the hot water storage tank (3) is equal to or lower than the predetermined heat quantity, the hot water supply path switching valve (71) The hot water supply apparatus according to claim 5, wherein the combustor hot water supply path (L15) is communicated with the common hot water supply path (L13). 前記燃焼機（１）にて加熱された温水が流通する燃焼機給湯経路（Ｌ１５）と、
前記貯湯タンク（３）の上部の温水が流通する上部給湯経路（Ｌ１２）と、
前記燃焼機給湯経路（Ｌ１５）および前記上部給湯経路（Ｌ１２）に接続されて給湯部に温水を導く共通給湯経路（Ｌ１３）と、
前記上部給湯経路（Ｌ１２）に配置されて、前記燃焼機給湯経路（Ｌ１５）から前記貯湯タンク（３）への温水の流れを阻止する給湯経路逆止弁（６４）と、
前記貯湯タンク（３）における上下方向中間部の温水を前記共通給湯経路（Ｌ１３）に導く中温水給湯経路（Ｌ２８）と、
前記燃焼機給湯経路（Ｌ１５）および前記上部給湯経路（Ｌ１２）から前記給湯部に流れる温水と前記中温水給湯経路（Ｌ２８）から前記給湯部に流れる温水の流量比を調整する中温水混合弁（７６）とを備えることを特徴とする請求項１ないし４のいずれか１つに記載の給湯装置。 A combustor hot water supply path (L15) through which hot water heated by the combustor (1) flows;
An upper hot water supply path (L12) through which hot water in the upper part of the hot water storage tank (3) flows;
A common hot water supply path (L13) connected to the combustor hot water supply path (L15) and the upper hot water supply path (L12) to guide hot water to the hot water supply section;
A hot water supply path check valve (64) disposed in the upper hot water supply path (L12) and blocking the flow of hot water from the combustor hot water supply path (L15) to the hot water storage tank (3);
An intermediate hot water hot water supply path (L28) for guiding the hot water in the vertical intermediate portion of the hot water storage tank (3) to the common hot water supply path (L13);
A medium-temperature water mixing valve for adjusting a flow rate ratio of hot water flowing from the combustor hot water supply path (L15) and the upper hot water supply path (L12) to the hot water supply section and warm water flowing from the intermediate hot water hot water supply path (L28) to the hot water supply section ( 76). The hot water supply device according to any one of claims 1 to 4, wherein 前記中温水混合弁（７６）は、前記貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および前記貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、前記燃焼機給湯経路（Ｌ１５）および前記上部給湯経路（Ｌ１２）から前記給湯部に温水を流すとともに、前記中温水給湯経路（Ｌ２８）から前記給湯部への温水の流れを停止することを特徴とする請求項７に記載の給湯装置。 When the temperature of the hot water at the upper part of the hot water storage tank (3) is equal to or lower than the predetermined temperature and the total heat amount of the hot water in the hot water storage tank (3) is equal to or lower than the predetermined heat amount, the intermediate hot water mixing valve (76) Hot water is allowed to flow from the combustor hot water supply path (L15) and the upper hot water supply path (L12) to the hot water supply section, and the flow of hot water from the intermediate hot water hot water supply path (L28) to the hot water supply section is stopped. The hot water supply device according to claim 7. 給水源から前記燃焼機（１）に水を導く燃焼機給水経路（Ｌ１４）と、
前記燃焼機給水経路（Ｌ１４）に配置されて、前記燃焼機（１）から前記給水源側への水の流れを阻止する給水経路逆止弁（６５）を備えることを特徴とする請求項７または８に記載の給湯装置。 A combustor water supply path (L14) for guiding water from a water supply source to the combustor (1);
The water supply path check valve (65) disposed in the combustor water supply path (L14) to prevent the flow of water from the combustor (1) to the water supply source side is provided. Or the hot water supply apparatus of 8. 前記貯湯タンク（３）における上下方向中間部の温水を前記燃焼機（１）に導く燃焼機給水経路（Ｌ１４）を備えることを特徴とする請求項１ないし３のいずれか１つに記載の給湯装置。 The hot water supply according to any one of claims 1 to 3, further comprising a combustor water supply path (L14) for guiding warm water in an intermediate portion in the vertical direction of the hot water storage tank (3) to the combustor (1). apparatus. 前記燃焼機給水経路（Ｌ１４）および前記燃焼機循環経路（Ｌ２１）は、合流して前記燃焼機（１）の入口側に接続されていることを特徴とする請求項１０に記載の給湯装置。 The hot water supply apparatus according to claim 10, wherein the combustor water supply path (L14) and the combustor circulation path (L21) are joined and connected to an inlet side of the combustor (1). 前記燃焼機（１）にて加熱された温水が流通する燃焼機給湯経路（Ｌ１５）と、
前記貯湯タンク（３）の上部の温水が流通する上部給湯経路（Ｌ１２）と、
前記燃焼機給湯経路（Ｌ１５）および前記上部給湯経路（Ｌ１２）に接続されて給湯部に温水を導く共通給湯経路（Ｌ１３）と、
前記燃焼機給湯経路（Ｌ１５）および前記上部給湯経路（Ｌ１２）を前記共通給湯経路（Ｌ１３）に選択的に連通させる給湯経路切換弁（７１）とを備えることを特徴とする請求項１０または１１に記載の給湯装置 A combustor hot water supply path (L15) through which hot water heated by the combustor (1) flows;
An upper hot water supply path (L12) through which hot water in the upper part of the hot water storage tank (3) flows;
A common hot water supply path (L13) connected to the combustor hot water supply path (L15) and the upper hot water supply path (L12) to guide hot water to the hot water supply section;
A hot water supply path switching valve (71) for selectively communicating the combustor hot water supply path (L15) and the upper hot water supply path (L12) with the common hot water supply path (L13). Hot water supply device described in 前記貯湯タンク（３）の上部の温水の温度が所定温度以下の場合、および前記貯湯タンク（３）内の温水の総熱量が所定熱量以下の場合に、前記燃焼機（１）を作動させることを特徴とする請求項１０ないし１２のいずれか１つに記載の給湯装置。 The combustor (1) is operated when the temperature of the hot water in the upper part of the hot water storage tank (3) is not more than a predetermined temperature and when the total amount of heat of the hot water in the hot water storage tank (3) is not more than a predetermined heat amount. The hot water supply device according to any one of claims 10 to 12.
JP2006309359A 2006-11-15 2006-11-15 Water heater Expired - Fee Related JP5130696B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2006309359A JP5130696B2 (en) 2006-11-15 2006-11-15 Water heater

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP2006309359A JP5130696B2 (en) 2006-11-15 2006-11-15 Water heater

Publications (2)

Publication Number Publication Date
JP2008122037A true JP2008122037A (en) 2008-05-29
JP5130696B2 JP5130696B2 (en) 2013-01-30

Family

ID=39506974

Family Applications (1)

Application Number Title Priority Date Filing Date
JP2006309359A Expired - Fee Related JP5130696B2 (en) 2006-11-15 2006-11-15 Water heater

Country Status (1)

Country Link
JP (1) JP5130696B2 (en)

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009299942A (en) * 2008-06-11 2009-12-24 Rinnai Corp Hot water supply system
JP2009299941A (en) * 2008-06-11 2009-12-24 Rinnai Corp Hot water supply system
JP2011149682A (en) * 2010-07-22 2011-08-04 Panasonic Electric Works Co Ltd Hot water supply system
JP2012092997A (en) * 2010-10-25 2012-05-17 Toho Gas Co Ltd Hot water supply space heating system
KR101460882B1 (en) 2012-04-10 2014-11-13 린나이코리아 주식회사 Heating system

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002295908A (en) * 2001-03-30 2002-10-09 Tokyo Gas Co Ltd Heating medium circulating type heating equipment
JP2003240346A (en) * 2002-02-13 2003-08-27 Tokyo Gas Co Ltd Hot water supply system and its control method
JP2004144381A (en) * 2002-10-23 2004-05-20 Denso Corp Mixing valve for hot water storage type hot water supply device
JP2005214452A (en) * 2004-01-27 2005-08-11 Denso Corp Hot water storage type water heater

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2002295908A (en) * 2001-03-30 2002-10-09 Tokyo Gas Co Ltd Heating medium circulating type heating equipment
JP2003240346A (en) * 2002-02-13 2003-08-27 Tokyo Gas Co Ltd Hot water supply system and its control method
JP2004144381A (en) * 2002-10-23 2004-05-20 Denso Corp Mixing valve for hot water storage type hot water supply device
JP2005214452A (en) * 2004-01-27 2005-08-11 Denso Corp Hot water storage type water heater

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2009299942A (en) * 2008-06-11 2009-12-24 Rinnai Corp Hot water supply system
JP2009299941A (en) * 2008-06-11 2009-12-24 Rinnai Corp Hot water supply system
JP2011149682A (en) * 2010-07-22 2011-08-04 Panasonic Electric Works Co Ltd Hot water supply system
JP2012092997A (en) * 2010-10-25 2012-05-17 Toho Gas Co Ltd Hot water supply space heating system
KR101460882B1 (en) 2012-04-10 2014-11-13 린나이코리아 주식회사 Heating system

Also Published As

Publication number Publication date
JP5130696B2 (en) 2013-01-30

Similar Documents

Publication Publication Date Title
JP5087484B2 (en) Hot water storage hot water heater
JP5130696B2 (en) Water heater
EP1875138A2 (en) Hot water installations
JP5472178B2 (en) Hot water heater
JP2007232345A (en) Storage type hot water supply heating device
JP2018031520A (en) Storage water heater
JP2004218921A (en) Heat pump water heater
NO326440B1 (en) Arrangement and method for controlling fluid temperature change
JP2004101134A (en) Hot water storage type hot-water feeder
JP2007147107A (en) Hot-water storage type hot-water supply device
JP4877580B2 (en) Hot water storage water heater
JP2012093064A (en) Space heating system
JP2020106227A (en) Heat source device
JP2011153772A (en) Storage type hot water supply device
JP2016164472A (en) Heat source device
JP2009097770A (en) Circulation flow volume calculating method for heat pump type hot water heating apparatus
JP2014142112A (en) Hot water storage type water heater
JP4207867B2 (en) Hot water storage water heater
JP2005076975A (en) Hot water supply system
JP5090019B2 (en) Hot water storage water heater
JP2002364912A (en) Multifunctional water-heater
JP2004205141A (en) Heat pump water heater
JP2020106226A (en) Heat source device
JP4155162B2 (en) Hot water storage water heater
JP6729072B2 (en) Hot water supply system

Legal Events

Date Code Title Description
A621 Written request for application examination

Free format text: JAPANESE INTERMEDIATE CODE: A621

Effective date: 20090116

A977 Report on retrieval

Free format text: JAPANESE INTERMEDIATE CODE: A971007

Effective date: 20110714

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20110726

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20110926

A131 Notification of reasons for refusal

Free format text: JAPANESE INTERMEDIATE CODE: A131

Effective date: 20120313

A521 Written amendment

Free format text: JAPANESE INTERMEDIATE CODE: A523

Effective date: 20120426

TRDD Decision of grant or rejection written
A01 Written decision to grant a patent or to grant a registration (utility model)

Free format text: JAPANESE INTERMEDIATE CODE: A01

Effective date: 20121009

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

Free format text: JAPANESE INTERMEDIATE CODE: A01

A61 First payment of annual fees (during grant procedure)

Free format text: JAPANESE INTERMEDIATE CODE: A61

Effective date: 20121022

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

Free format text: PAYMENT UNTIL: 20151116

Year of fee payment: 3

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

Free format text: PAYMENT UNTIL: 20151116

Year of fee payment: 3

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

R250 Receipt of annual fees

Free format text: JAPANESE INTERMEDIATE CODE: R250

LAPS Cancellation because of no payment of annual fees