JP5577135B2 - Water heater - Google Patents

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JP5577135B2
JP5577135B2 JP2010084990A JP2010084990A JP5577135B2 JP 5577135 B2 JP5577135 B2 JP 5577135B2 JP 2010084990 A JP2010084990 A JP 2010084990A JP 2010084990 A JP2010084990 A JP 2010084990A JP 5577135 B2 JP5577135 B2 JP 5577135B2
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hot water
water supply
heat exchange
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JP2011214793A (en
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敏也 辰己
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Purpose Co Ltd
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本発明は、給湯熱源に蓄熱された熱媒を用いて給湯する給湯装置に関する。
The present invention relates to a hot water supply apparatus that supplies hot water using a heat medium stored in a hot water supply heat source.

従来、ヒートポンプ等で加熱された熱媒を熱源に用いて上水に熱交換する給湯装置が知られている。   2. Description of the Related Art Conventionally, a hot water supply apparatus that uses a heat medium heated by a heat pump or the like as a heat source to exchange heat with clean water is known.

例えば、熱媒を熱源に用いる間接式給湯装置に補助熱源とを組み合わせて給湯制御を行うことにより、熱交換効率の低下やランニングコストの増加を抑制した給湯装置が知られている(特許文献1)。この給湯装置では、出湯の際、貯湯タンク内から給湯用熱交換器に流す蓄熱用流体が所定温度以下である場合には、その流量を抑制し、補助熱源を用いて給湯水を加熱している。   For example, a hot water supply apparatus is known in which a reduction in heat exchange efficiency and an increase in running cost are suppressed by performing hot water supply control by combining an indirect hot water supply apparatus that uses a heat medium as a heat source with an auxiliary heat source (Patent Document 1). ). In this hot water supply device, when the heat storage fluid flowing from the hot water storage tank to the hot water supply heat exchanger is below a predetermined temperature at the time of hot water discharge, the flow rate is suppressed and the hot water is heated using an auxiliary heat source. Yes.

また、蓄熱用流体を熱源に用いた給湯装置に関し、蓄熱用流体の熱を給湯用水に熱交換して目標温度に昇温させ、目標温度に到達させた給湯用水に非加熱の給湯用水を混合することにより、その混合水を適温まで低下させて出湯することが知られている(特許文献2)。
In addition, regarding a hot water supply device using a heat storage fluid as a heat source, heat of the heat storage fluid is exchanged with hot water for heating to a target temperature, and unheated hot water is mixed with hot water that has reached the target temperature. By doing this, it is known that the mixed water is lowered to an appropriate temperature and discharged (Patent Document 2).

特開2009−150635号公報JP 2009-150635 A 特開2001−153458号公報JP 2001-153458 A

ところで、このような給湯装置では、給湯用水の熱源に温水等の熱媒を利用しており、この熱媒はエンジンの放熱や燃焼熱等によって加熱され、蓄熱タンク等に溜めらる。このように蓄熱タンクに溜めた熱媒によって蓄熱し、この蓄熱を利用する場合、補助熱源を併用して熱を効率的に利用することが熱効率を高める上で不可欠である。   By the way, in such a hot water supply apparatus, a heat medium such as hot water is used as a heat source for hot water supply water, and this heat medium is heated by heat radiation of the engine, combustion heat, or the like, and is stored in a heat storage tank or the like. When heat is stored by the heat medium stored in the heat storage tank as described above and this heat storage is used, it is indispensable to increase the heat efficiency by using the auxiliary heat source in combination with the heat efficiently.

また、このような給湯装置では、給湯に上水圧を利用し、適当な給湯水圧や給湯量を得ているが、給湯用水を流す管路が複雑化すると、管路で圧力損失を生じ、高所への給湯が困難になったり、シャワー等の水勢が低下するおそれがある。斯かる圧力損失は、給湯装置における補助熱源側の管路においても生じ、その圧力損失は補助熱源側の管路形態や水量に応じて大きくなる。   Also, in such a hot water supply device, the hot water pressure is used for hot water supply to obtain an appropriate hot water supply water pressure and amount, but if the pipe for flowing hot water is complicated, a pressure loss occurs in the pipe. There is a risk that it will be difficult to supply hot water to the place, and the water flow such as a shower will decrease. Such pressure loss also occurs in the pipe line on the auxiliary heat source side in the hot water supply apparatus, and the pressure loss increases according to the pipe form on the auxiliary heat source side and the amount of water.

そこで、本発明の第1の目的は、蓄熱した熱媒の熱を有効利用するとともに、補助熱源側の効率的な利用を図ることにある。   Therefore, a first object of the present invention is to effectively use the heat of the stored heat medium and to efficiently use the auxiliary heat source side.

また、本発明の第2の目的は、蓄熱した熱媒の熱を有効利用するとともに、補助熱源を利用する場合に圧力損失の増加を抑制することにある。
The second object of the present invention is to effectively use the heat of the stored heat medium and to suppress an increase in pressure loss when an auxiliary heat source is used.

上記目的を達成した本発明の給湯装置は以下の通りである。   The hot water supply apparatus of the present invention that achieves the above object is as follows.

上記第1の目的及び上記第2の目的を達成するため、本発明の給湯装置は、熱媒の熱を給水に熱交換する第1の熱交換手段と、この第1の熱交換手段に直列に接続され、又は前記第1の熱交換手段が接続された管路に並列に接続され、補助熱源の熱を前記給水に熱交換する第2の熱交換手段と、前記第2の熱交換手段の出側に設置され、熱交換で得られた温水に前記給水を混合させる混合手段と、前記熱媒を熱媒管路内に循環させる循環ポンプと、前記第1の熱交換手段の熱交換で給湯目標温度が得られる場合には前記第1の熱交換手段のみで熱交換を行わせ、又はこの熱交換で前記給湯目標温度が得られない場合には前記第1の熱交換手段及び前記第2の熱交換手段の双方又は前記第2の熱交換手段のみで熱交換を行わせ、前記第2の熱交換手段で熱交換を行わせる場合には、前記第2の熱交換手段の熱交換温度を高く設定し、前記混合手段で混合される前記給水に対する前記第2の熱交換手段の温水比率を低減させる制御手段とを備えている。
In order to achieve the first object and the second object , the hot water supply apparatus of the present invention includes a first heat exchanging means for exchanging heat of the heat medium to the feed water, and the first heat exchanging means in series. Or a second heat exchanging means for exchanging heat of the auxiliary heat source to the feed water, and a second heat exchanging means connected in parallel to the pipe line to which the first heat exchanging means is connected. The mixing means for mixing the feed water with the hot water obtained by heat exchange, the circulation pump for circulating the heat medium in the heat medium pipe line, and the heat exchange of the first heat exchange means When the hot water supply target temperature is obtained, heat exchange is performed only by the first heat exchange means, or when the hot water supply target temperature is not obtained by this heat exchange, the first heat exchange means and the to perform the heat exchange only or both the second heat exchange means of the second heat exchange means, said second heat exchange When to perform the heat exchange means, a heat exchanger temperature is set high in the second heat exchange means, to reduce the hot water ratio of said second heat exchange means to said water supply to be mixed in the mixing means Control means.

上記第1の目的を達成するため、本発明の給湯装置は、熱媒の熱を給水に熱交換する第1の熱交換手段と、この第1の熱交換手段に直列に接続され、又は前記第1の熱交換手段が接続された管路に並列に接続され、補助熱源の熱を前記給水に熱交換する第2の熱交換手段と、前記第2の熱交換手段の出側に設置され、熱交換で得られた温水に前記給水を混合させる混合手段と、前記熱媒を熱媒管路内に循環させる循環ポンプと、熱媒温度を検出する第1の温度検出手段と、前記第1の熱交換手段の通過水温度を検出する第2の温度検出手段と、前記混合手段の入側の温水温度を検出する第3の温度検出手段と、前記熱媒温度に第1の基準温度、前記第2の温度検出手段の通過水温度に第2の基準温度を設定し、前記第1の温度検出手段の検出温度が前記第1の基準温度より高ければ前記第1の熱交換手段を選択して前記給水に熱交換させ、前記第1の基準温度より低ければ前記第2の熱交換手段のみを選択して前記給水に熱交換させ、また、前記第1の熱交換手段を選択した場合であって、前記第2の基準温度が得られるように制御した前記熱媒の循環流量が所定量に達した場合は、前記第1の熱交換手段及び前記第2の熱交換手段を選択して前記給水に熱交換させる制御手段とを備えている。 In order to achieve the first object, the hot water supply apparatus of the present invention is connected in series to the first heat exchanging means for exchanging heat of the heat medium to the feed water, and to the first heat exchanging means, or A second heat exchanging means connected in parallel to the pipe line to which the first heat exchanging means is connected and exchanging heat of the auxiliary heat source to the feed water, and installed on the outlet side of the second heat exchanging means. Mixing means for mixing the feed water with hot water obtained by heat exchange, a circulation pump for circulating the heat medium in the heat medium pipe line, first temperature detection means for detecting the heat medium temperature, and the first a second temperature detecting means for detecting passage water temperature of the first heat exchange means, a third temperature detecting means for detecting a hot water temperature of the inlet side of the mixing means, the first criteria before Symbol heat medium temperature The second reference temperature is set to the temperature and the passing water temperature of the second temperature detection means, and the detection of the first temperature detection means Degrees so that heat exchange to the water supply by selecting the first heat exchange means is higher than said first reference temperature, only the selected first lower if the second heat exchange means than the reference temperature When heat is exchanged with the water supply and the first heat exchanging means is selected, and the circulating flow rate of the heat medium controlled to obtain the second reference temperature reaches a predetermined amount Comprises control means for selecting the first heat exchange means and the second heat exchange means to exchange heat with the water supply .

上記第1の目的を達成するには、この給湯装置において、更に、前記第1の熱交換手段及び前記第2の熱交換手段の管路をバイパスして前記混合手段に前記給水を流す第1のバイパス路と、前記第2の熱交換手段の管路をバイパスし、前記第1の熱交換手段を通過した前記温水又は前記給水を前記混合手段に流す第2のバイパス路と、前記第2の熱交換手段が設置された前記管路に設置され、該管路を開閉する第1の開閉手段と、前記第2のバイパス路に設置され、該バイパス路を開閉する第2の開閉手段とを備えてもよい。
In order to achieve the first object, in the hot water supply apparatus, further, the first heat exchange means and the second heat exchange means bypass the conduits of the first heat flow to the mixing means. And a second bypass passage that bypasses the conduit of the second heat exchange means and flows the hot water or the feed water that has passed through the first heat exchange means to the mixing means, and the second A first opening / closing means that opens and closes the pipe, and a second opening / closing means that opens and closes the bypass. May be provided.

本発明の給湯装置によれば、次の効果が得られる。   According to the hot water supply apparatus of the present invention, the following effects can be obtained.

(1) 熱媒の熱量を優先的に熱源に用いて給湯加熱を行うことができ、熱効率を高めることができる。   (1) Hot water heating can be performed using the heat quantity of the heat medium preferentially as a heat source, and the thermal efficiency can be improved.

(2) 第2の熱交換手段で熱交換を行わせる場合には、第2の熱交換手段の熱交換温度を高く設定し、混合手段で混合される前記給水に対する第2の熱交換手段の温水比率を低減させるので、第2の熱交換手段側での圧力損失を低下させることができ、給湯の水勢を低下させることがなく、上水圧等を利用した豊かな給湯を行うことができる。   (2) When heat exchange is performed by the second heat exchange means, the heat exchange temperature of the second heat exchange means is set high, and the second heat exchange means for the feed water mixed by the mixing means Since the hot water ratio is reduced, the pressure loss on the second heat exchange means side can be reduced, and rich hot water supply utilizing the hot water pressure or the like can be performed without reducing the water flow of the hot water supply.

(3) 蓄熱量が十分な場合、その熱媒のみで供給された上水を所望の温度に加熱給湯をすることができる。   (3) When the amount of stored heat is sufficient, the hot water supplied only with the heat medium can be heated to a desired temperature.

(4) 熱媒のみでは所望温度に加熱できない場合、補助熱源を使用し所望温度での給湯ができる。   (4) If the heating medium alone cannot be used to heat to the desired temperature, hot water can be supplied at the desired temperature using an auxiliary heat source.

(5) 補助熱源を使用した場合でも給湯の圧力損失の増加を抑えることができる。
(5) Even when an auxiliary heat source is used, an increase in hot water pressure loss can be suppressed.

第1の実施の形態に係る給湯装置の一例を示す図である。It is a figure which shows an example of the hot water supply apparatus which concerns on 1st Embodiment. 制御部の一例を示す図である。It is a figure which shows an example of a control part. 給湯制御の一例を示すフローチャートである。It is a flowchart which shows an example of hot water supply control. 第2の実施の形態に係る給湯制御の一例を示すフローチャートである。It is a flowchart which shows an example of the hot water supply control which concerns on 2nd Embodiment. 熱媒のみによる給湯加熱を行う場合の閾値を示す図である。It is a figure which shows the threshold value in the case of performing hot water supply heating only with a heat medium.

〔第1の実施の形態〕 [First Embodiment]

第1の実施形態について、図1を参照する。図1は給湯装置の一例を示す図である。なお、図1に示す構成は一例であって、これに限定されない。   For the first embodiment, reference is made to FIG. FIG. 1 is a diagram illustrating an example of a hot water supply apparatus. The configuration illustrated in FIG. 1 is an example, and the present invention is not limited to this.

この給湯装置2は、本発明の給湯装置の一例であって、第1熱交換器4と、第2熱交換器6と、制御部8とを備えている。   The hot water supply device 2 is an example of the hot water supply device of the present invention, and includes a first heat exchanger 4, a second heat exchanger 6, and a control unit 8.

第1熱交換器4は、第1の熱交換手段の一例であって、管路10、12との間に設置され、管路10に流す熱媒14の熱を管路12側に流れる給水Wに熱交換する。管路10には熱媒源として蓄熱タンク16が接続され、蓄熱タンク16は熱媒14の貯留手段の一例である。管路10は、始端側を蓄熱タンク16の上部に接続され、終端側を蓄熱タンク16の底部に接続されている。この管路10には与熱ポンプ18が設置され、熱媒14で給水Wを加熱する場合、蓄熱タンク16にある上層部の熱媒14が第1熱交換器4に供給され、熱交換後の熱媒14が蓄熱タンク16にある熱媒14の下層部側に戻される。   The 1st heat exchanger 4 is an example of the 1st heat exchange means, Comprising: It is installed between the pipe lines 10 and 12, and the water supply which flows the heat | fever of the heat medium 14 which flows into the pipe line 10 to the pipe line 12 side Heat exchange with W. A heat storage tank 16 is connected to the pipe line 10 as a heat medium source, and the heat storage tank 16 is an example of a storage unit for the heat medium 14. The pipe 10 has a start end connected to the top of the heat storage tank 16 and a terminal end connected to the bottom of the heat storage tank 16. In this pipe line 10, a heat pump 18 is installed, and when the feed water W is heated by the heat medium 14, the upper layer heat medium 14 in the heat storage tank 16 is supplied to the first heat exchanger 4, and after heat exchange The heat medium 14 is returned to the lower layer side of the heat medium 14 in the heat storage tank 16.

蓄熱タンク16には、熱媒14の上層部から低層部までの温度を複数箇所で検出する温度検出手段としてタンク温度センサ20、22、24、26が設置され、第1熱交換器4に供給する熱媒14の温度は上層部にある温度センサ20の検出温度が参照される。このタンク温度センサ20は、第1の温度検出手段の一例であって、検出した温度は、例えば、蓄熱タンク16に溜められた熱媒14を利用して給水Wの加熱を行えるか否かの判断に利用する。   In the heat storage tank 16, tank temperature sensors 20, 22, 24, and 26 are installed as temperature detection means for detecting temperatures from the upper layer portion to the lower layer portion of the heat medium 14 at a plurality of locations, and supplied to the first heat exchanger 4. The temperature of the heating medium 14 to be referred is referred to the temperature detected by the temperature sensor 20 in the upper layer. The tank temperature sensor 20 is an example of first temperature detection means, and the detected temperature is, for example, whether or not the water supply W can be heated using the heat medium 14 stored in the heat storage tank 16. Use for judgment.

また、管路12には、温度センサ28、30や給湯流量センサ32が設置されているとともに第1熱交換器4の入側を分岐した第1のバイパス管路34が形成されている。このバイパス管路34を通過した非加熱の給水Wは、混合弁36に供給される。温度センサ28は、給湯装置2に取込まれた給水Wの温度を検出する手段の一例である。また温度センサ30は、第1の温度検出手段の一例であって、第1熱交換器4を通過した通過水の温度を検出する手段である。この通過水は、例えば、第1熱交換器4で加熱された温水又は非加熱の給水Wを示す。   Further, the pipe 12 is provided with temperature sensors 28 and 30 and a hot water supply flow rate sensor 32 and is formed with a first bypass pipe 34 that branches the inlet side of the first heat exchanger 4. The unheated water supply W that has passed through the bypass pipe 34 is supplied to the mixing valve 36. The temperature sensor 28 is an example of means for detecting the temperature of the water supply W taken into the hot water supply device 2. The temperature sensor 30 is an example of first temperature detection means, and is means for detecting the temperature of water passing through the first heat exchanger 4. The passing water indicates, for example, warm water heated by the first heat exchanger 4 or non-heated water supply W.

次に、第2熱交換器6は、第2の熱交換手段の一例であって、補助熱源装置38に設置されている。この実施の形態では、第2熱交換器6は第1熱交換器4に管路40によって直列に接続されている。管路40には第1の開閉弁42が設置されている。管路40には管路12から分岐した第2のバイパス管路44が形成され、バイパス管路44と第2熱交換器6とは並列に接続されている。バイパス管路44には第2の開閉弁46が設置され、この開閉弁46と既述の開閉弁42とで切替弁が構成されている。即ち、この切替弁は、管路40と管路44とを選択的に切り替える切替え手段を構成している。第2熱交換器6には、第1熱交換器4の通過水が管路40を通して供給される。   Next, the second heat exchanger 6 is an example of a second heat exchange means, and is installed in the auxiliary heat source device 38. In this embodiment, the second heat exchanger 6 is connected to the first heat exchanger 4 in series by a pipe line 40. A first opening / closing valve 42 is installed in the pipeline 40. A second bypass conduit 44 branched from the conduit 12 is formed in the conduit 40, and the bypass conduit 44 and the second heat exchanger 6 are connected in parallel. The bypass pipe 44 is provided with a second on-off valve 46, and the on-off valve 46 and the above-described on-off valve 42 constitute a switching valve. That is, the switching valve constitutes a switching unit that selectively switches between the pipeline 40 and the pipeline 44. The passing water of the first heat exchanger 4 is supplied to the second heat exchanger 6 through the pipe line 40.

補助熱源装置38にはガスバーナ48が設置され、このガスバーナ48が補助熱源の一例である。そして、第2熱交換器6は、ガスバーナ48が燃料ガスを燃焼して発生する燃焼排気の持つ熱と管路40を通して供給される温水HW又は給水Wとを熱交換させる。なお、補助熱源装置38の熱源は、このガスバーナ48に限られず、例えば電気ヒータを利用してもよい。   A gas burner 48 is installed in the auxiliary heat source device 38, and this gas burner 48 is an example of the auxiliary heat source. Then, the second heat exchanger 6 exchanges heat between the heat of the combustion exhaust generated when the gas burner 48 burns the fuel gas and the hot water HW or the feed water W supplied through the conduit 40. The heat source of the auxiliary heat source device 38 is not limited to the gas burner 48, and an electric heater, for example, may be used.

第1熱交換器4又は第2熱交換器6で熱交換された温水HWは管路50を通り混合弁36に流れ、バイパス管路34から流れる非加熱の給水Wと混合されて出湯される。管路50には、混合弁36の入側に温度センサ52、出側に温度センサ54が設置されている。温度センサ52は、第3の温度検出手段の一例であって、第1熱交換器4や第2の熱交換器6によって加熱された湯水HWの温度を検出する手段である。この温度センサ52の検出温度は、熱交換処理の基準温度が設定されおり、給湯装置2の熱交換制御処理に利用される。また、温度センサ54は、給湯装置2の出湯温度検出手段の一例であって、混合弁36で給水Wと混合した温水HWの出湯温度を検出する。   Hot water HW heat-exchanged by the 1st heat exchanger 4 or the 2nd heat exchanger 6 flows into the mixing valve 36 through the pipe line 50, is mixed with the unheated feed water W which flows from the bypass pipe line 34, and is discharged. . In the pipe 50, a temperature sensor 52 is installed on the entry side of the mixing valve 36, and a temperature sensor 54 is installed on the exit side. The temperature sensor 52 is an example of third temperature detection means, and is means for detecting the temperature of the hot water HW heated by the first heat exchanger 4 or the second heat exchanger 6. The reference temperature of the heat exchange process is set as the detected temperature of the temperature sensor 52 and is used for the heat exchange control process of the hot water supply device 2. Moreover, the temperature sensor 54 is an example of the hot water temperature detection means of the hot water supply device 2 and detects the hot water temperature of the hot water HW mixed with the water supply W by the mixing valve 36.

混合弁36は、既述のように、加熱後の温水HWと非加熱の給水Wとを所定の割合で混合させる手段の一例であって、管路50とバイパス管路34とに接続されており、給湯要求温度で出湯するように管路50側及びバイパス管路34側の開度を調整する。そして、この混合弁36は、開度制御を行うことによって給湯装置2に供給された給水Wに対し、加熱を行う管路12側と加熱を行わないバイパス管路34側とに流す流量制御手段を構成している。   As described above, the mixing valve 36 is an example of means for mixing the heated hot water HW and the non-heated water supply W at a predetermined ratio, and is connected to the pipe 50 and the bypass pipe 34. The opening degree on the pipe line 50 side and the bypass line 34 side is adjusted so that the hot water is discharged at the required hot water supply temperature. The mixing valve 36 controls the flow rate of the feed water W supplied to the hot water supply device 2 by performing the opening degree control to the heating pipe 12 side and the non-heating bypass pipe 34 side. Is configured.

なお、上記のタンク温度センサ20、22、24、26、温度センサ28、30、52、54は、給水W、温水HW、熱媒14の温度を検出できるものであればどのような構成でもよく、例えば、サーミスタ温度計等を利用してもよい。   The tank temperature sensors 20, 22, 24, 26 and the temperature sensors 28, 30, 52, 54 may have any configuration as long as they can detect the temperature of the feed water W, the hot water HW, and the heating medium 14. For example, a thermistor thermometer or the like may be used.

制御部8は、給湯要求に応じて熱媒14側の循環制御や補助熱源装置38の運転制御、及び混合弁36や開閉弁42、46等の開閉制御を行う手段の一例であって、給湯装置2の任意の位置に設置されている。そして、この制御部8では、例えば、温度センサ30等が検出した第1熱交換器4の出側温度情報を受け取って監視する。また、第1熱交換器4の熱交換で目標温度が得られるか否かの判断を行う。そして、第1熱交換器4のみで熱交換を行わせ、又はこの熱交換で目標温度が得られない場合には第1熱交換器4及び第2熱交換器6の双方又は第2熱交換器6のみで熱交換を行わせるように制御する。   The control unit 8 is an example of means for performing circulation control on the heat medium 14 side, operation control of the auxiliary heat source device 38, and open / close control of the mixing valve 36, the open / close valves 42 and 46, etc. in response to a hot water supply request. It is installed at an arbitrary position of the device 2. And in this control part 8, for example, the outgoing side temperature information of the 1st heat exchanger 4 which temperature sensor 30 grade | etc., Detected is received and monitored. Further, it is determined whether or not the target temperature can be obtained by heat exchange of the first heat exchanger 4. And heat exchange is performed only by the 1st heat exchanger 4, or when the target temperature is not obtained by this heat exchange, both the 1st heat exchanger 4 and the 2nd heat exchanger 6, or 2nd heat exchange Control is performed so that heat exchange is performed only by the vessel 6.

次に、この給湯装置2は、熱媒14を加熱する構成として、発熱装置56を備えている。この発熱装置56は、例えば、発電用のエンジン等で構成した加熱手段58、排熱熱交換器60を備えている。排熱熱交換器60は、加熱手段58で発生した熱を熱媒14に熱交換する手段の一例であって、管路62、64との間に設置される。管路62は、熱媒14を排熱熱交換器60側との間で循環させる手段の一例であって、始端側を蓄熱タンク16の底部側に接続し、排熱熱交換器60を通過して終端側を蓄熱タンク14の上部側に設置している。管路64は、加熱手段58で発生した熱を排熱熱交換器60側に供給し、熱媒14と熱交換させる手段の一例であって、例えば、熱媒としてエンジン等の冷却水等を循環させる手段である。また、管路62には、例えば、貯湯ポンプ66、熱媒温度センサ68、また、蓄熱タンク16の入側で分岐し、蓄熱タンク16をバイパスするバイパス管路70、切替弁72を備えている。   Next, the hot water supply device 2 includes a heat generating device 56 as a configuration for heating the heat medium 14. The heat generating device 56 includes, for example, a heating unit 58 and an exhaust heat exchanger 60 that are configured by a power generation engine or the like. The exhaust heat exchanger 60 is an example of means for exchanging heat generated by the heating means 58 to the heat medium 14, and is installed between the pipe lines 62 and 64. The pipe line 62 is an example of means for circulating the heat medium 14 to and from the exhaust heat exchanger 60 side, and connects the start end side to the bottom side of the heat storage tank 16 and passes through the exhaust heat exchanger 60. Thus, the terminal side is installed on the upper side of the heat storage tank 14. The pipe 64 is an example of a means for supplying heat generated by the heating means 58 to the exhaust heat exchanger 60 side and exchanging heat with the heat medium 14. For example, cooling water for an engine or the like is used as the heat medium. It is a means to circulate. Further, the pipe line 62 includes, for example, a hot water storage pump 66, a heat medium temperature sensor 68, a bypass pipe 70 that branches off on the inlet side of the heat storage tank 16 and bypasses the heat storage tank 16, and a switching valve 72. .

貯湯ポンプ66は、管路62内に熱媒14を循環させる手段であって、蓄熱タンク16の下層部側より低温の熱媒14を取り出し、排熱熱交換器60で熱交換することにより排熱を吸収し、蓄熱タンク16の上部へ高温の熱媒14を戻すことにより蓄熱する。熱媒温度センサ68は排熱熱交換後の熱媒14の温度を検出する手段の一例である。切替弁72は、熱媒14を蓄熱タンク16側とバイパス管路70側とに切替える手段の一例である。所定温度に達しない熱媒14が蓄熱タンク16に戻るのを防止する。例えば、温度センサ68で検出した熱媒14の温度に基づき、蓄熱タンク16へ戻す管路62とバイパス管路70とを切替え、再度排熱熱交換器60側へと流す。これにより、蓄熱タンク16内の熱媒14は上層部側が高温で下層部側が低温の階層を成すようになる。   The hot water storage pump 66 is a means for circulating the heat medium 14 in the pipe 62. The low temperature heat medium 14 is taken out from the lower layer side of the heat storage tank 16 and is discharged by exchanging heat with the exhaust heat exchanger 60. Heat is stored by absorbing heat and returning the high-temperature heat medium 14 to the upper part of the heat storage tank 16. The heat medium temperature sensor 68 is an example of means for detecting the temperature of the heat medium 14 after the exhaust heat exchange. The switching valve 72 is an example of means for switching the heat medium 14 between the heat storage tank 16 side and the bypass pipe line 70 side. The heat medium 14 that does not reach the predetermined temperature is prevented from returning to the heat storage tank 16. For example, on the basis of the temperature of the heat medium 14 detected by the temperature sensor 68, the pipe 62 and the bypass pipe 70 that are returned to the heat storage tank 16 are switched and flowed again to the exhaust heat exchanger 60 side. As a result, the heat medium 14 in the heat storage tank 16 forms a hierarchy in which the upper layer side is high temperature and the lower layer side is low temperature.

また、蓄熱タンク16には、例えば、蓄熱タンク16内に給水Wを補水する補水弁74を備えた補水管路76が設置されている。この補水管路76は、例えば、一端側を管路12の給水側に接続し、他端側を貯水タンク16の底部側に接続している。この補水弁74は、蓄熱タンク内の熱媒として上水を補給するために設けられており、例えば、蓄熱タンク16内の熱媒14が蒸発等により減少したことを蓄熱タンク16内の水位センサ等で検知した場合に開放し、所定の水位に満たされると閉止する。   The heat storage tank 16 is provided with, for example, a water replenishment conduit 76 having a water replenishment valve 74 for replenishing the water supply W in the heat storage tank 16. For example, one end side of the supplemental water conduit 76 is connected to the water supply side of the conduit 12, and the other end side is connected to the bottom side of the water storage tank 16. The refill water valve 74 is provided to replenish clean water as a heat medium in the heat storage tank. For example, a water level sensor in the heat storage tank 16 indicates that the heat medium 14 in the heat storage tank 16 has decreased due to evaporation or the like. It opens when it is detected by, etc., and closes when it reaches a predetermined water level.

次に、給湯装置の制御部の構成について、図2を参照する。図2は、制御部の構成例を示す図である。なお、図2に示す構成は一例であって、これに限定されない。また、図2において、図1と同一の構成には同一の符号を付し、その説明を省略する。   Next, FIG. 2 is referred about the structure of the control part of a hot-water supply apparatus. FIG. 2 is a diagram illustrating a configuration example of the control unit. The configuration illustrated in FIG. 2 is an example, and the present invention is not limited to this. In FIG. 2, the same components as those in FIG. 1 are denoted by the same reference numerals, and the description thereof is omitted.

制御部8は、マイクロコンピュータによって構成されており、例えば、検出情報を取り込む入力手段、各種演算を実行する演算手段、制御プログラム等を記憶する記憶手段、制御信号を出力する出力手段等を備えている。また、制御部8は、給湯装置2のリモコン装置80と接続している。この制御部8には、例えば、CPU(Central Processing Unit )82、記憶手段の一例であるROM(Read-Only Memory) 84、RAM(Random-Access Memory)86等を備える。CPU82は演算手段の一例であって、ROM84にある制御プログラムを実行し、検出温度等を制御情報に用いてその演算等の処理を行い、制御出力を発生する。RAM86はプログラムの実行エリアを構成する。   The control unit 8 is configured by a microcomputer, and includes, for example, an input unit that captures detection information, a calculation unit that executes various calculations, a storage unit that stores a control program, and an output unit that outputs a control signal. Yes. Further, the control unit 8 is connected to a remote control device 80 of the hot water supply device 2. The control unit 8 includes, for example, a CPU (Central Processing Unit) 82, a ROM (Read-Only Memory) 84 which is an example of a storage unit, a RAM (Random-Access Memory) 86, and the like. The CPU 82 is an example of computing means, executes a control program in the ROM 84, performs processing such as computation using the detected temperature or the like as control information, and generates a control output. The RAM 86 constitutes a program execution area.

この制御部8は、検出情報として、例えば、給湯流量センサ32、タンク温度センサ20、22、24、26、温度センサ28、30、52、54、熱媒温度センサ68、その他入力88等からの検出信号を受け取っている。また、例えば、与熱ポンプ18の回転数情報や管路10内を循環する熱媒14の流量情報等を取り込んでいる。尚、管路10内に流量センサを設置して流量情報を取得してもよい。この検出信号を利用し、例えば、リモコン装置80に設けられた各種スイッチの入力等により設定された各種データや、制御プログラムにより給湯制御処理の演算を行う。そして、制御部8は、開閉弁42、46、切替弁72、混合弁36、貯湯ポンプ66、与熱ポンプ18、補助熱源装置38に設置されたガスバーナ48等、補水弁74、その他出力90等に対して給湯制御指示を出力する。また、その給湯制御情報や検出温度情報等をリモコン装置80側に伝送し、リモコン装置80に備えた表示手段に表示をしてもよく、またブザー等による報知を行ってもよい。   The control unit 8 detects, for example, the hot water flow rate sensor 32, the tank temperature sensors 20, 22, 24, 26, the temperature sensors 28, 30, 52, 54, the heat medium temperature sensor 68, and other inputs 88. A detection signal is received. Further, for example, the rotational speed information of the heat pump 18 and the flow rate information of the heat medium 14 circulating in the pipe 10 are taken in. In addition, a flow rate sensor may be installed in the pipe line 10 to acquire flow rate information. By using this detection signal, for example, calculation of hot water supply control processing is performed by various data set by input of various switches provided in the remote control device 80 and the control program. Then, the control unit 8 includes an on-off valve 42, 46, a switching valve 72, a mixing valve 36, a hot water storage pump 66, a heat pump 18, a gas burner 48 installed in the auxiliary heat source device 38, a supplementary water valve 74, other output 90, etc. A hot water supply control instruction is output to. Further, the hot water supply control information, the detected temperature information, etc. may be transmitted to the remote control device 80 side and displayed on the display means provided in the remote control device 80, or a notification by a buzzer or the like may be given.

この制御部8による給湯制御は、例えば、給水流量や給水温度に基づいて必要熱量を算出してもよく、又は検出情報に基づいて所定の制御テーブルを参照してポンプの回転数制御や燃焼制御を行ってもよい。また、バイパス管路34と管路12側とに流す給水Wの流量制御について、例えば、温度センサ28、30、52、54からの検出温度に基づいてフィードバック制御を行ってもよい。   In the hot water supply control by the control unit 8, for example, the necessary heat quantity may be calculated based on the feed water flow rate or the feed water temperature, or the pump rotation speed control or the combustion control with reference to a predetermined control table based on the detection information. May be performed. In addition, regarding the flow rate control of the feed water W that flows to the bypass pipeline 34 and the pipeline 12 side, feedback control may be performed based on the detected temperatures from the temperature sensors 28, 30, 52, 54, for example.

このような構成において、給湯装置2の制御部8では、第1熱交換器4の熱交換で給湯目標温度が得られる場合には第1熱交換器4のみで熱交換を行わせる。また、この熱交換で給湯目標温度が得られない場合には、第1熱交換器4及び第2熱交換器6の双方又は第2熱交換器6側のみで熱交換を行わせる。この場合、熱媒14の温度に第1の基準温度を設定し、タンク温度センサ20の検出温度が第1の基準温度より高いか否かを判断してもよい。そして、第1の基準温度より高ければ第1熱交換器4を利用して熱交換することを選択する。第1の基準温度より低い場合には、補助熱源装置38の第2熱交換器6のみで給水Wを加熱することを選択する。   In such a configuration, the control unit 8 of the hot water supply device 2 causes only the first heat exchanger 4 to perform heat exchange when the hot water supply target temperature is obtained by heat exchange of the first heat exchanger 4. When the hot water supply target temperature cannot be obtained by this heat exchange, heat exchange is performed only on both the first heat exchanger 4 and the second heat exchanger 6 or only on the second heat exchanger 6 side. In this case, a first reference temperature may be set as the temperature of the heat medium 14 and it may be determined whether or not the detected temperature of the tank temperature sensor 20 is higher than the first reference temperature. If the temperature is higher than the first reference temperature, the heat exchange using the first heat exchanger 4 is selected. When the temperature is lower than the first reference temperature, it is selected that the feed water W is heated only by the second heat exchanger 6 of the auxiliary heat source device 38.

また、給湯装置2の制御部8は温度センサ30で検出される第1熱交換器4を通過した給水W又は温水HWに第2の基準温度を設定する。そして、タンク温度センサ20の検出温度が第1の基準温度より高い場合であって、第2の基準温度が得られるように制御した熱媒14の循環流量が所定量以上となった場合は、第1熱交換器4及び第2熱交換器6を併用して熱交換を行う。   Moreover, the control part 8 of the hot water supply apparatus 2 sets a 2nd reference temperature to the feed water W or the warm water HW which passed the 1st heat exchanger 4 detected by the temperature sensor 30. FIG. When the temperature detected by the tank temperature sensor 20 is higher than the first reference temperature and the circulating flow rate of the heating medium 14 controlled to obtain the second reference temperature is equal to or greater than a predetermined amount, Heat exchange is performed using the first heat exchanger 4 and the second heat exchanger 6 together.

そして、この給湯装置2では、第2熱交換器6で熱交換を行う場合は、第2熱交換器6での熱交換温度を高く設定する。これにより、混合弁36で混合される給水Wに対する第2熱交換器6側から流す温水HWの比率を低減させる。即ち、給湯装置2に供給された一定量の給水Wに対し、補助熱源装置38側に流す給水W又は温水HWの流量を低減させ、第2熱交換器6側での熱交換温度を高く設定することで、圧力損失の増加を抑制できるとともに、給湯設定温度での出湯が可能になる。   And in this hot water supply apparatus 2, when heat exchange is performed in the second heat exchanger 6, the heat exchange temperature in the second heat exchanger 6 is set high. Thereby, the ratio of the hot water HW flowing from the second heat exchanger 6 side to the feed water W mixed by the mixing valve 36 is reduced. That is, with respect to a certain amount of water supply W supplied to the hot water supply device 2, the flow rate of the water supply W or hot water HW flowing to the auxiliary heat source device 38 side is reduced, and the heat exchange temperature on the second heat exchanger 6 side is set higher. By doing so, an increase in pressure loss can be suppressed, and hot water can be discharged at the hot water supply set temperature.

次に、給湯装置2の給湯制御について、図3を参照する。図3は、給湯制御の一例を示すフローチャートである。なお、図3に示す処理内容、処理手順等は一例であって、これに限定されない。   Next, FIG. 3 will be referred to regarding hot water control of the hot water supply device 2. FIG. 3 is a flowchart illustrating an example of hot water supply control. Note that the processing contents, processing procedures, and the like shown in FIG. 3 are examples, and the present invention is not limited to these.

この給湯装置2の給湯制御では、蓄熱された熱媒14のみで給湯加熱を行う処理(F1)と、蓄熱した熱媒14による加熱と補助熱源装置38による加熱とを併用する処理(F2)と、補助熱源装置38のみで給湯加熱を行う処理(F3)とを含む。この給湯制御において、熱媒14を利用した加熱を行う場合には、例えば、熱媒14のみを利用した加熱処理(F1)を行った後に熱媒14による加熱処理と補助熱源装置38による加熱との併用処理(F2)、補助熱源装置38のみによる加熱処理(F3)の順に行えばよい。   In the hot water supply control of the hot water supply device 2, a process of performing hot water supply heating using only the stored heat medium 14 (F 1), and a process of combining heating with the stored heat medium 14 and heating with the auxiliary heat source device 38 (F 2) And the process (F3) of performing hot water heating only with the auxiliary heat source device 38. In the hot water supply control, when heating using the heating medium 14 is performed, for example, after performing the heating process (F1) using only the heating medium 14, the heating process using the heating medium 14 and the heating by the auxiliary heat source device 38 are performed. The combined treatment (F2) of the above and the heat treatment (F3) using only the auxiliary heat source device 38 may be performed in this order.

給湯装置2の電源が入れられると、初期設定処理として、例えば、制御部8のI/O(入出力部:Input/Output)の初期化や各種設定に対する初期値をセットし、与熱ポンプ18や補助熱源装置38を停止状態にして待機させる(ステップS11)。そして、タンク温度センサ20の検出温度を参照し、蓄熱タンク16の上部側から供給される熱媒14の温度が規定温度T1 として、例えば、入水温度+5〔℃〕以上か否かを判断を行う(ステップS12)。この規定温度T1 は、熱媒14を利用して給湯加熱が行えるか否かを判断する第1の基準温度である。従って、検出した温度が規定温度T1 以上である場合(ステップS12のYES)、蓄熱された熱媒14を使用可能と判定し、給湯開始を待つ。また、規定温度T1 に満たない場合(ステップS12のNO)には、与熱ポンプ18を停止状態に維持し、熱媒循環を行わない。そして、この場合には、補助熱源装置38のみでの給湯加熱(F3)を行うため、開閉弁42を開状態にするとともに、開閉弁46を閉状態にし、補助熱源装置38に通過水を通す回路を構成して給湯開始に備える(ステップS13)。 When the hot water supply device 2 is turned on, as the initial setting process, for example, initialization of I / O (input / output unit: Input / Output) of the control unit 8 and initial values for various settings are set, and the heat pump 18 Alternatively, the auxiliary heat source device 38 is stopped and waited (step S11). Then, referring to the temperature detected by the tank temperature sensor 20, it is determined whether or not the temperature of the heat medium 14 supplied from the upper side of the heat storage tank 16 is equal to or higher than the incoming water temperature +5 [° C.], for example, as the specified temperature T 1. It performs (step S12). The specified temperature T 1 is a first reference temperature for determining whether or not hot water heating can be performed using the heating medium 14. Accordingly, when the detected temperature is equal to or higher than the specified temperature T 1 (YES in step S12), it is determined that the stored heat medium 14 can be used, and the start of hot water supply is awaited. Further, when the temperature does not reach the specified temperature T 1 (NO in step S12), the heat pump 18 is maintained in a stopped state and the heat medium is not circulated. In this case, since the hot water supply heating (F3) is performed only by the auxiliary heat source device 38, the open / close valve 42 is opened, the open / close valve 46 is closed, and the passing water is passed through the auxiliary heat source device 38. A circuit is configured to prepare for the start of hot water supply (step S13).

給湯栓やシャワー等の蛇口を開放することにより、所定の水圧で給水Wが供給され、この給水Wの供給を給湯流量センサ32がONすることで検出すると(ステップS14のYES)、熱媒14のみによる加熱処理(F1)を開始する。開閉弁42を閉状態及び開閉弁46を開状態にして、通過水を補助熱源装置38側に流さない回路を構成する(ステップS15)。そして、第1熱交換器4で熱媒14と熱交換した湯水HWに対して、温度センサ30での検出温度が第1の所定温度Tw1 になるように与熱ポンプ18の回転数制御を行う(ステップS16)。この所定温度Tw1 は、給湯装置2の第2の基準温度の一例であって、例えば、温水HWが給湯設定温度+5〔℃〕となるように回転数を制御する。この温度センサ30の検出温度が所定温度Tw1 よりも低い場合は、与熱ポンプ18の回転数を増加させ、逆に高い場合には、回転数を減少させて熱媒14の循環量を減らす。 By opening a faucet such as a hot water tap or shower, the water supply W is supplied at a predetermined water pressure. When the supply of the water supply W is detected by turning on the hot water supply flow rate sensor 32 (YES in step S14), the heating medium 14 Heat treatment (F1) by only is started. The on-off valve 42 is closed and the on-off valve 46 is opened to configure a circuit that does not allow the passing water to flow to the auxiliary heat source device 38 side (step S15). And with respect to the hot water HW heat-exchanged with the heat medium 14 in the 1st heat exchanger 4, rotation speed control of the heat pump 18 is performed so that the detection temperature in the temperature sensor 30 may become 1st predetermined temperature Tw1. This is performed (step S16). This predetermined temperature Tw 1 is an example of the second reference temperature of the hot water supply device 2, and for example, the rotational speed is controlled so that the hot water HW becomes the hot water supply set temperature +5 [° C.]. When the temperature detected by the temperature sensor 30 is lower than the predetermined temperature Tw 1 , the rotational speed of the heat pump 18 is increased, and when it is higher, the rotational speed is decreased to reduce the circulation amount of the heat medium 14. .

混合弁36は第1熱交換器4で所定温度Tw1 まで加熱された温水HWと、バイパス管路34から供給される非加熱の給水Wとを混合させる(ステップS17)。ここでは、温度センサ54の検出温度が給湯設定温度になるように混合弁36の開度制御を行う。 The mixing valve 36 mixes the hot water HW heated to the predetermined temperature Tw 1 by the first heat exchanger 4 and the non-heated water supply W supplied from the bypass line 34 (step S17). Here, the opening degree of the mixing valve 36 is controlled so that the temperature detected by the temperature sensor 54 becomes the hot water supply set temperature.

そして、上記の制御処理ととともに、与熱ポンプ18の回転数の監視を行い(ステップS18)、与熱ポンプ制御(ステップS16)を行った結果、与熱ポンプ18の回転数が所定回転数に満たない場合(ステップS18のNO)には、蓄熱した熱媒14での加熱処理のみ(F1)による給湯が可能であると判断する。与熱ポンプ18の回転数が所定回転数以上となっている場合(ステップS18のYES)、即ち、熱媒14によって所定温度Tw1 に加熱するために熱媒14の循環流量が所定量以上となる場合には、補助熱源装置38を併用する処理(F2)に移行する。この与熱ポンプ18に設定した所定回転数は、熱媒14の循環量が大きくなることで、第1熱交換器4を通過して蓄熱タンク16に戻す熱媒14の温度が所定の温度以上にならないように決定する基準回転数である。また、熱媒14による熱交換を継続することによって、例えば、蓄熱した熱が減少することによって、回転数を増加させても熱交換した湯水HWの温度上昇が見込めなくなる。従って、補助熱源装置38を併用することで、効率よく熱交換を行う。 Then, together with the above control process, the rotation speed of the heat pump 18 is monitored (step S18), and the heat pump control (step S16) is performed. As a result, the rotation speed of the heat pump 18 is set to a predetermined rotation speed. If not (NO in step S18), it is determined that hot water can be supplied only by the heat treatment with the heat storage medium 14 stored (F1). When the rotation speed of the heat pump 18 is equal to or higher than the predetermined rotation speed (YES in Step S18), that is, the heating medium 14 is heated to the predetermined temperature Tw 1 so that the circulating flow rate of the heat medium 14 is equal to or higher than the predetermined amount. In this case, the process proceeds to processing (F2) in which the auxiliary heat source device 38 is used together. The predetermined number of rotations set in the heat pump 18 is such that the temperature of the heat medium 14 passing through the first heat exchanger 4 and returning to the heat storage tank 16 is equal to or higher than the predetermined temperature because the circulation amount of the heat medium 14 increases. This is the reference rotation speed determined so as not to become. Further, by continuing the heat exchange by the heat medium 14, for example, the stored heat is reduced, so that the temperature rise of the hot water HW after the heat exchange cannot be expected even if the rotation speed is increased. Therefore, heat exchange is efficiently performed by using the auxiliary heat source device 38 in combination.

給湯処理F2では、給湯流量センサ32がONか否かを監視し(ステップS19)、給湯中である場合(ステップS19のYES)には、開閉弁42を開状態、開閉弁46を閉状態にし(ステップS20)、温水HWが補助熱源装置38に流入可能な流路を構成する。そして、与熱ポンプ制御として、温度センサ30の検出温度が第2の所定温度Tw2 になるように与熱ポンプ18の回転数を制御する(ステップS21)。この所定温度Tw2 は、例えば、タンク温度センサ20の検出温度−5〔℃〕となる基準温度である。与熱ポンプ制御は、温度センサ30の検出温度が所定温度Tw2 より低ければ与熱ポンプ18の回転数を増加させ、所定温度Tw2 よりも高ければ回転数を減少させる。 In the hot water supply process F2, it is monitored whether or not the hot water supply flow rate sensor 32 is ON (step S19). If hot water is being supplied (YES in step S19), the open / close valve 42 is opened and the open / close valve 46 is closed. (Step S20), a flow path through which the hot water HW can flow into the auxiliary heat source device 38 is formed. Then, as the heat pump control, the rotational speed of the heat pump 18 is controlled so that the temperature detected by the temperature sensor 30 becomes the second predetermined temperature Tw 2 (step S21). The predetermined temperature Tw 2 is a reference temperature that is, for example, a detection temperature −5 [° C.] of the tank temperature sensor 20. Azukanetsu pump control, the temperature detected by the temperature sensor 30 increases the rotational speed of the Azukanetsu pump 18 if lower than the predetermined temperature Tw 2, to reduce the rotational speed is higher than the predetermined temperature Tw 2.

また、補助熱源装置制御として、温度センサ52の検出温度が第3の所定温度Tw3 として、例えば、80〔℃〕になるように加熱制御を行う(ステップS22)。この加熱制御では、例えば、第2熱交換器6に流入する温水HWの流量や温度センサ30に設定された所定温度Tw2 との温度差等からガスバーナ48の燃焼制御を行えばよい。そして、混合弁制御として、温度センサ54での検出温度が給湯設定温度になるように混合弁36の開度制御を行って、バイパス管路34から流入する給水Wの割合を制御する(ステップS23)。 Further, as auxiliary heat source device control, heating control is performed so that the temperature detected by the temperature sensor 52 is, for example, 80 [° C.] as the third predetermined temperature Tw 3 (step S22). In this heating control, for example, the combustion control of the gas burner 48 may be performed from the flow rate of the hot water HW flowing into the second heat exchanger 6, the temperature difference from the predetermined temperature Tw 2 set in the temperature sensor 30, or the like. Then, as the mixing valve control, the opening degree of the mixing valve 36 is controlled so that the temperature detected by the temperature sensor 54 becomes the hot water supply set temperature, thereby controlling the ratio of the feed water W flowing from the bypass pipe 34 (step S23). ).

なお、上記の与熱ポンプ制御や補助熱源制御、混合弁制御は、各処理毎に独立して制御する場合に限られず、各処理が関連して制御される。例えば、混合弁制御によって熱交換を行う管路12側とバイパス管路34側との流入比率が変動した場合には、それに関連して与熱ポンプ制御や補助熱源制御を行う。   In addition, said heat pump control, auxiliary heat source control, and mixing valve control are not restricted to controlling independently for every process, but each process is controlled in relation to it. For example, when the inflow ratio between the pipe line 12 side that performs heat exchange by the mixing valve control and the bypass pipe line side fluctuates, the heat pump control and the auxiliary heat source control are performed in association therewith.

そして、この給湯制御(F2)では、タンク温度センサ20による熱媒温度の監視を行い、熱媒14の温度が既述の規定温度T1 以上か否かの判断を繰り返し行う(ステップS24)。即ち、熱媒14を利用して給湯加熱を継続した結果、例えば、蓄熱温度が低下することで熱媒14が給湯加熱に利用できなくなっているか否かを監視している。温度監視の結果、規定温度T1 以上であれば(ステップS24のYES)、蓄熱された熱媒14による加熱が有効であると判断し、給湯制御(F2)を継続する。また、規定温度T1 に達しない場合には(ステップS24のNO)、補助熱源装置38のみで給湯加熱を行う給湯制御(F3)に移行する。 Then, in the hot water supply control (F2), monitors the heat medium temperature according to the tank temperature sensor 20, the temperature of the heating medium 14 is performed repeatedly determines whether aforementioned specified temperature above T 1 (step S24). That is, as a result of continuing the hot water supply heating using the heat medium 14, for example, it is monitored whether or not the heat medium 14 can no longer be used for hot water supply heating due to a decrease in the heat storage temperature. Results of temperature monitoring, if the specified temperature above T 1 (YES in step S24), and heated by the heat storage has been heat medium 14 is determined to be valid and continues the hot water supply control (F2). When it is not reached the prescribed temperature T 1 of shifts to (NO in step S24), and the auxiliary heat source unit 38 only hot water control for the hot water supply heated (F3).

熱媒14の温度が規定温度T1 に達しない場合(ステップS12のNO、ステップS24のNO)給湯制御(F3)に移行する。この制御では、給湯流量センサ32がONか否かを監視し(ステップS25)、給湯中である場合(ステップS25のYES)には、与熱ポンプ18を停止させる(ステップS26)。そして、温度センサ52の検出温度が第3の所定温度Tw3 になるように加熱制御を行う(ステップS27)。そして、混合弁制御として、温度センサ54での検出温度が給湯設定温度になるように混合弁36の開度制御を行って、バイパス管路34から流入する給水Wの割合を制御する(ステップS28)。 When the temperature of the heating medium 14 does not reach the specified temperature T 1 (NO in step S12, NO in step S24), the process proceeds to hot water supply control (F3). In this control, it is monitored whether or not the hot water supply flow rate sensor 32 is ON (step S25). If hot water supply is being performed (YES in step S25), the heat pump 18 is stopped (step S26). Then, heating control is performed so that the temperature detected by the temperature sensor 52 becomes the third predetermined temperature Tw 3 (step S27). Then, as the mixing valve control, the degree of opening of the mixing valve 36 is controlled so that the temperature detected by the temperature sensor 54 becomes the hot water supply set temperature, thereby controlling the ratio of the feed water W flowing from the bypass pipeline 34 (step S28). ).

上記のように、熱媒14のみで給湯加熱を行う場合には、混合弁制御(ステップS17)において第1の所定温度Tw1 まで加熱した湯水HWと非加熱の給水Wとを混合させて給湯設定温度での出湯が可能なように流量比率を制御する。これに対し、補助熱源装置38を利用した給湯加熱では、混合弁制御(ステップS23、ステップS28)において、第3の所定温度Tw3 まで加熱した湯水HWと非加熱の給水Wとを混合させている。そして、所定温度Tw3 は所定温度Tw1 よりも高温に設定されており、給湯装置2内に同一の流量で給水Wが供給されるので、補助熱源装置38を利用する場合には、バイパス管路34に流す流量が多く設定される。即ち、補助熱源装置38側を通過する温水HWの流量が少ないので、管路内における圧力損失を減らすことができる。 As described above, when hot water heating is performed using only the heat medium 14, the hot water HW heated to the first predetermined temperature Tw1 and the non-heated water W are mixed in the mixing valve control (step S17) to supply hot water. The flow rate ratio is controlled so that the hot water can be discharged at the set temperature. On the other hand, in the hot water supply heating using the auxiliary heat source device 38, the hot water HW heated to the third predetermined temperature Tw3 and the non-heated water supply W are mixed in the mixing valve control (step S23, step S28). Yes. The predetermined temperature Tw 3 is set higher than the predetermined temperature Tw 1 , and the feed water W is supplied into the hot water supply device 2 at the same flow rate. Therefore, when the auxiliary heat source device 38 is used, the bypass pipe A large flow rate is set to flow through the path 34. That is, since the flow rate of the hot water HW passing through the auxiliary heat source device 38 is small, the pressure loss in the pipe line can be reduced.

斯かる構成によれば、熱媒の熱量を優先的に熱源に用いて給湯加熱を行うことができ、熱効率を高めることができる。また、第2の熱交換手段で熱交換を行わせる場合には、第2の熱交換手段の熱交換温度を高く設定し、混合手段で混合される前記給水に対する第2の熱交換手段の温水比率を低減させるので、第2の熱交換手段側での圧力損失を低下させることができ、給湯の水勢を低下させることがなく、上水圧等を利用した豊かな給湯を行うことができる。蓄熱量が十分な場合、その熱媒のみで供給された上水を所望の温度に加熱給湯が可能となる。熱媒のみでは所望の温度に加熱できない場合、補助熱源を使用し所望の温度での給湯が可能となる。補助熱源を使用した場合でも給湯の圧力損失を抑えることができる。   According to such a configuration, it is possible to perform hot water supply heating by using the heat quantity of the heat medium preferentially as a heat source, and it is possible to increase the thermal efficiency. When heat exchange is performed by the second heat exchange means, the heat exchange temperature of the second heat exchange means is set high, and the warm water of the second heat exchange means for the water supply mixed by the mixing means Since the ratio is reduced, the pressure loss on the second heat exchanging means side can be reduced, and rich hot water supply utilizing the hot water pressure or the like can be performed without reducing the water flow of the hot water supply. When the amount of heat storage is sufficient, hot water supplied to the desired temperature can be supplied to the water supplied only by the heat medium. If the heating medium alone cannot be used to heat to a desired temperature, hot water can be supplied at the desired temperature using an auxiliary heat source. Even when an auxiliary heat source is used, the pressure loss of the hot water supply can be suppressed.

〔第2の実施の形態〕 [Second Embodiment]

次に、第2の実施の形態として、給湯装置2に対する他の給湯制御例について、図4を参照する。図4は、第2の実施の形態に係る給湯制御の一例を示すフローチャートである。なお、図4に示す処理手順等は一例であって、これに限定されない。また、図4において、図3と同一処理内容については、その説明を省略する。   Next, as a second embodiment, FIG. 4 will be referred to for another hot water supply control example for the hot water supply apparatus 2. FIG. 4 is a flowchart showing an example of hot water supply control according to the second embodiment. The processing procedure shown in FIG. 4 is an example, and the present invention is not limited to this. In FIG. 4, the description of the same processing contents as those in FIG. 3 is omitted.

この給湯制御においても、既述のように、第1の基準温度として熱媒14の温度を監視して、熱媒14を利用した給湯加熱を行うか否かを判断し、利用できない場合には、補助熱源装置38を利用して給湯加熱を行う。また、熱媒14を利用可能な場合には、熱媒14のみでの加熱処理又は補助熱源装置38を併用して給湯加熱を行う。   Also in this hot water supply control, as described above, the temperature of the heat medium 14 is monitored as the first reference temperature, and it is determined whether or not the hot water heating using the heat medium 14 is performed. Then, hot water heating is performed using the auxiliary heat source device 38. Further, when the heat medium 14 can be used, hot water heating is performed by using only the heat medium 14 or using the auxiliary heat source device 38 together.

電源を入れると初期設定によりI/Oの初期化や各種設定の初期値のセット等を行い、与熱ポンプ18、補助熱源装置38を停止状態とする(ステップS31)。給湯栓の開放やシャワーの使用開始に伴う給湯開始で給湯流量センサ32がONすると(ステップS32のYES)、熱媒14の温度をタンク温度センサ20により検出する。その検出温度が規定温度T1 として、入水温度+5〔℃〕以上であれば(ステップS33のYES)、蓄熱された熱媒を使用可能と判定し、入水温度+5〔℃〕に満たない場合は(ステップS33のNO)与熱ポンプ18を停止状態とし(ステップS41)熱媒循環を行わない。 When the power is turned on, initialization of I / O, setting of initial values of various settings, etc. are performed by initial setting, and the heat pump 18 and the auxiliary heat source device 38 are stopped (step S31). When the hot water supply flow rate sensor 32 is turned ON at the start of hot water supply associated with the opening of the hot water tap or the start of use of the shower (YES in step S32), the temperature of the heating medium 14 is detected by the tank temperature sensor 20. If the detected temperature is equal to or higher than the incoming water temperature +5 [° C.] as the specified temperature T 1 (YES in step S33), it is determined that the stored heat transfer medium can be used, and the incoming water temperature +5 [° C.] is not reached. (NO in step S33) The heat pump 18 is stopped (step S41) and the heat medium is not circulated.

熱媒14が使用可能と判定した場合(ステップS33のYES)、タンク温度センサ20の検出温度が規定温度T2 以上か否かを監視する(ステップS34)。この規定温度T2 は、給湯装置2の最大給湯能力(号数)であっても熱媒14による加熱のみで給湯設定温度での給湯が可能となる温度であって、例えば、温度センサ28によって検出される入水温度、給湯設定温度等により決定する。熱媒14の温度が規定温度T2 以上の場合は(ステップS34のYES)、熱媒14による加熱のみで給湯設定温度での給湯が可能と判定する。そして、温度センサ30が第1の所定温度Tw1 として、例えば、給湯設定温度+5〔℃〕となるように与熱ポンプ18を制御する(ステップS35)。温度センサ30の検出温度が所定温度Tw1 より低ければ、与熱ポンプ18の回転数を増加させて熱媒流量を増やす。また所定温度Tw1 より高ければ回転数を下げて流量を減らす。また、補助熱源装置38を使用しないため、開閉弁46を開状態とし(ステップS36)、開閉弁42を閉状態として(ステップS37)、補助熱源装置38を停止状態とする(ステップS38)。 If the heating medium 14 is determined to be used (YES in step S33), the detected temperature of the tank temperature sensor 20 monitors whether prescribed temperature T 2 or more (step S34). This specified temperature T 2 is a temperature at which hot water supply at the hot water supply set temperature is possible only by heating with the heat medium 14 even if it is the maximum hot water supply capacity (number) of the hot water supply device 2. It is determined by the detected incoming water temperature, hot water set temperature, etc. When the temperature of the heat medium 14 is equal to or higher than the specified temperature T 2 (YES in step S34), it is determined that hot water supply at the hot water supply set temperature is possible only by heating with the heat medium 14. And the temperature sensor 30 controls the heat pump 18 as 1st predetermined temperature Tw1, for example so that it may become hot water supply preset temperature +5 [degreeC] (step S35). If the temperature detected by the temperature sensor 30 is lower than the predetermined temperature Tw 1, increasing the heating-medium flow rate by increasing the rotational speed of the Azukanetsu pump 18. Also reduces the flow rate by decreasing the rotational speed is higher than the predetermined temperature Tw 1. Since the auxiliary heat source device 38 is not used, the on-off valve 46 is opened (step S36), the on-off valve 42 is closed (step S37), and the auxiliary heat source device 38 is stopped (step S38).

第1熱交換器4で所定温度Tw1 まで加熱された湯水HWは混合弁36により温度センサ54が給湯設定温度になるように未加熱の給水Wと混合させる(ステップS39)。 The hot water HW heated to the predetermined temperature Tw 1 in the first heat exchanger 4 is mixed with the unheated water W so that the temperature sensor 54 becomes the hot water supply set temperature by the mixing valve 36 (step S39).

タンク温度センサ20の検出温度が規定温度T2 に満たない場合は(ステップS34のNO)、熱媒14による加熱のみでは給湯設定温度での給湯ができないので、補助熱源装置38による加熱が必要となる。この場合、熱媒14の蓄熱を有効利用するため、温度センサ30が第2の所定温度Tw2 として、タンク温度センサの検出温度−5〔℃〕になるように与熱ポンプ18を制御(ステップS40)する。そして、第1熱交換器4において給水Wを加熱したのち、補助熱源装置38による加熱を行う。与熱ポンプ18の制御は、温度センサ30の検出温度が所定温度Tw2 より低ければ与熱ポンプ18の回転数を上げて熱媒流量を増やし、高ければ回転数を下げ流量を減らす。 If the detected temperature of the tank temperature sensor 20 is lower than the specified temperature T 2 (NO in step S34), since the only heating by the heating medium 14 can not be hot water in the hot water set temperature and requires heating by the auxiliary heat source unit 38 Become. In this case, in order to effectively utilize the thermal storage of the heat medium 14, the temperature sensor 30 is a second predetermined temperature Tw 2, controls the Azukanetsu pump 18 so that the detected temperature -5 [℃] of the tank temperature sensor (step S40). Then, after heating the feed water W in the first heat exchanger 4, the auxiliary heat source device 38 performs heating. Control of Azukanetsu pump 18 is to increase the heating-medium flow rate detection temperature of the temperature sensor 30 by increasing the rotational speed of the Azukanetsu pump 18 if lower than the predetermined temperature Tw 2, reducing the flow rate to lower the rotation speed is higher.

補助熱源装置38での加熱処理は、開閉弁42を開状態とし(ステップS42)、開閉弁46を閉状態として(ステップS43)、補助熱源装置38を通る流路を構成する。そして、補助熱源装置38は加熱後の湯水HWに対し温度センサ52の検出温度が第3の所定温度Tw3 として、例えば、80〔℃〕になるように加熱制御を行う(ステップS44)。 In the heat treatment in the auxiliary heat source device 38, the on-off valve 42 is opened (step S42), the on-off valve 46 is closed (step S43), and a flow path passing through the auxiliary heat source device 38 is formed. Then, the auxiliary heat source device 38 performs heating control on the heated hot water HW so that the temperature detected by the temperature sensor 52 becomes, for example, 80 [° C.] as the third predetermined temperature Tw 3 (step S44).

補助熱源装置38で所定温度Tw3 まで加熱された温水HWが温度センサ54の検出温度が給湯設定温度になるように、混合弁36の開度制御を行い、非加熱の給水Wと混合させて出湯する(ステップS39)。 The opening degree of the mixing valve 36 is controlled so that the hot water HW heated to the predetermined temperature Tw 3 by the auxiliary heat source device 38 becomes the hot water supply set temperature, and mixed with the non-heated water W. The hot water is discharged (step S39).

斯かる給湯制御によっても、熱媒の熱量を優先的に熱源に用いて給湯加熱を行うことができ、熱効率を高めることができる。また、第2の熱交換手段で熱交換を行わせる場合には、第2の熱交換手段の熱交換温度を高く設定し、混合手段で混合される前記給水に対する第2の熱交換手段の温水比率を低減させるので、第2の熱交換手段側での圧力損失を低下させることができ、給湯の水勢を低下させることがなく、上水圧等を利用した豊かな給湯を行うことができる。蓄熱量が十分な場合、その熱媒のみで供給された上水を所望の温度に加熱給湯が可能となる。熱媒のみでは所望の温度に加熱できない場合、補助熱源を使用し所望の温度での給湯が可能となる。補助熱源を使用した場合でも給湯の圧力損失を抑えることができる。   Also with such hot water supply control, hot water heating can be performed using the heat quantity of the heat medium preferentially as a heat source, and the thermal efficiency can be increased. When heat exchange is performed by the second heat exchange means, the heat exchange temperature of the second heat exchange means is set high, and the warm water of the second heat exchange means for the water supply mixed by the mixing means Since the ratio is reduced, the pressure loss on the second heat exchanging means side can be reduced, and rich hot water supply utilizing the hot water pressure or the like can be performed without reducing the water flow of the hot water supply. When the amount of heat storage is sufficient, hot water supplied to the desired temperature can be supplied to the water supplied only by the heat medium. If the heating medium alone cannot be used to heat to a desired temperature, hot water can be supplied at the desired temperature using an auxiliary heat source. Even when an auxiliary heat source is used, the pressure loss of the hot water supply can be suppressed.

〔実施例〕 〔Example〕

次に、蓄熱タンク16に蓄熱された熱媒14のみで給湯加熱が可能な場合について、給湯設定温度及び入水温に対する最低熱媒温度の閾値に関する実施例を図5を参照して説明する。   Next, with respect to the case where hot water supply heating is possible only with the heat medium 14 stored in the heat storage tank 16, an embodiment relating to the threshold value of the minimum heat medium temperature with respect to the hot water set temperature and the incoming water temperature will be described with reference to FIG.

給湯装置2毎に、給湯能力が設定されているとともに、熱媒を循環させる管路10に循環する熱媒14の最大流量や第1熱交換器4の熱交換能力も給湯装置により変わってくる。この実施例では、下記のような給湯能力条件の給湯装置2について説明する。
(1) 給湯能力24号(規制号数24号)
(2) 規制流量(最大給湯流量)24〔L/min〕
(3) 与熱回路の循環最大流量 20〔L/min〕
(4) 第一熱交換器の熱交換能力は所定値
The hot water supply capacity is set for each hot water supply apparatus 2, and the maximum flow rate of the heat medium 14 circulating in the pipe line 10 for circulating the heat medium and the heat exchange capacity of the first heat exchanger 4 also vary depending on the hot water supply apparatus. . In this embodiment, a hot water supply device 2 having the following hot water supply capacity conditions will be described.
(1) Hot water supply capacity 24 (regulation number 24)
(2) Regulated flow rate (maximum hot water flow rate) 24 [L / min]
(3) Heating circuit circulation maximum flow rate 20 [L / min]
(4) The heat exchange capacity of the first heat exchanger is a predetermined value

上記の給湯能力条件において、給湯設定温度に対し、第1熱交換器4を通過後の温水HWの温度について、一例として、給湯設定温度+5〔℃〕となる場合の熱媒14の温度を示す。ここで、最大給湯能力及び設定温度+5〔℃〕としたのは、給湯流量変動時や再出湯時の湯温の安定性を確保するためである。   In the above hot water supply capacity condition, the temperature of the hot water 14 after passing through the first heat exchanger 4 with respect to the hot water supply set temperature, as an example, shows the temperature of the heating medium 14 when the hot water supply set temperature +5 [° C.]. . Here, the reason for setting the maximum hot water supply capacity and the set temperature +5 [° C.] is to ensure the stability of the hot water temperature when the hot water flow rate fluctuates or when the hot water is discharged again.

図5に示すように、給湯設定温度毎に、各入水温度に対して熱交換後の上水温度が給湯設定温度+5〔℃〕となる熱媒の最低温度を計測している。ここでは、熱媒14の温度がこのグラフの線以上であれば、熱媒14による熱交換のみで給湯設定温度での給湯が可能となる。従って、この給湯設定温度と入水温度にて決まる熱媒温度を必要な範囲で予め制御部内に記憶しておき、規定温度T2 のテーブル情報として利用することができる。 As shown in FIG. 5, for each hot water supply set temperature, the minimum temperature of the heat medium at which the hot water temperature after heat exchange becomes the hot water supply set temperature + 5 [° C.] is measured for each incoming water temperature. Here, if the temperature of the heat medium 14 is equal to or higher than the line in this graph, hot water supply at the hot water supply set temperature can be performed only by heat exchange with the heat medium 14. Therefore, is stored in advance in the control portion to the extent necessary heat medium temperature determined by the hot water set temperature and the incoming water temperature, it can be utilized as table information for the specified temperature T 2.

これにより、同じ給湯設定温度であっても入水温により熱媒14の利用可能範囲が変化するため、熱媒14の有効利用が可能となる。   Thereby, even if it is the same hot-water supply preset temperature, since the available range of the heat medium 14 changes with incoming water temperature, the heat medium 14 can be used effectively.

なお、図5に示す結果は一例であって、他の給湯能力を持つ給湯装置2を用いた場合や、給湯装置2の設置条件、入水圧力等の条件によっても変動するものであって、本発明の制御処理について限定するものではない。

〔他の実施の形態〕
Note that the result shown in FIG. 5 is an example, and may vary depending on the case of using a hot water supply device 2 having other hot water supply capacity, the installation conditions of the hot water supply device 2, the incoming water pressure, and the like. The control process of the invention is not limited.

[Other Embodiments]

上記実施の形態では、バイパス管路34と管路12側とに流れる給水Wの流量制御は混合弁36の開度によって制御していたがこれに限られず、例えば、開閉弁42又は開閉弁46の開度を制御してもよい。即ち、第2の熱交換器6側に通過水を流す場合、開閉弁46を閉状態にするとともに、開閉弁42の開度を調整し、その流量を制御してもよい。また、バイパス管路44側に通過水を流す場合、開閉弁42を閉状態にするとともに、開閉弁46の開度を調整して流量を制御してもよい。   In the above embodiment, the flow rate control of the feed water W flowing through the bypass pipeline 34 and the pipeline 12 is controlled by the opening of the mixing valve 36, but is not limited to this. For example, the on-off valve 42 or the on-off valve 46 The degree of opening may be controlled. That is, when passing water to the second heat exchanger 6 side, the on-off valve 46 may be closed and the opening of the on-off valve 42 may be adjusted to control the flow rate. In addition, when passing water to the bypass conduit 44 side, the on-off valve 42 may be closed and the opening degree of the on-off valve 46 may be adjusted to control the flow rate.

上記実施の形態では、補助熱源装置38の加熱装置として、ガスバーナ48を利用した場合を示したが、これに限られない。例えば、補助熱源装置38として、暖房装置を併用し、第2熱交換器6に暖房用熱媒管路を設置して熱交換させて給湯加熱を行ってもよい。斯かる構成によっても上記の目的を達成することができる。   In the said embodiment, although the case where the gas burner 48 was utilized as a heating apparatus of the auxiliary heat source apparatus 38 was shown, it is not restricted to this. For example, a heating device may be used in combination as the auxiliary heat source device 38, and a heating medium conduit for heating may be installed in the second heat exchanger 6 for heat exchange to perform hot water supply heating. Such a configuration can also achieve the above object.

以上説明したように、本発明の好ましい実施の形態等について説明したが、本発明は、上記記載に限定されるものではなく、特許請求の範囲に記載され、又は明細書に開示された発明の要旨に基づき、当業者において様々な変形や変更が可能であることは勿論であり、斯かる変形や変更が、本発明の範囲に含まれることは言うまでもない。
As described above, the preferred embodiments of the present invention have been described. However, the present invention is not limited to the above description, and is described in the claims or disclosed in the specification. It goes without saying that various modifications and changes can be made by those skilled in the art based on the gist, and such modifications and changes are included in the scope of the present invention.

2 給湯装置
4 第1熱交換器
6 第2熱交換器
8 制御部
10、12 管路
14 熱媒
16 蓄熱タンク
18 与熱ポンプ
20、22、24、26、28、30、52、54 温度センサ
32 給湯流量センサ
34 第1のバイパス管路
36 混合弁
38 補助熱源装置
40、50、62、64 管路
42、46 開閉弁
44 第2のバイパス管路
48 ガスバーナ
56 発熱装置
58 加熱手段
60 排熱熱交換器
66 貯湯ポンプ
68 熱媒温度センサ
70 バイパス管路
72 切替弁
74 補水弁
76 補水管路
80 リモコン装置
DESCRIPTION OF SYMBOLS 2 Hot-water supply apparatus 4 1st heat exchanger 6 2nd heat exchanger 8 Control part 10, 12 Pipe line 14 Heat medium 16 Heat storage tank 18 Heat pump 20, 22, 24, 26, 28, 30, 52, 54 Temperature sensor 32 Hot water supply flow sensor 34 First bypass pipe 36 Mixing valve 38 Auxiliary heat source device 40, 50, 62, 64 Pipe 42, 46 On-off valve 44 Second bypass pipe 48 Gas burner 56 Heating device 58 Heating means 60 Waste heat Heat exchanger 66 Hot water storage pump 68 Heat medium temperature sensor 70 Bypass line 72 Switching valve 74 Refill valve 76 Refill line 80 Remote control device

Claims (3)

熱媒の熱を給水に熱交換する第1の熱交換手段と、
この第1の熱交換手段に直列に接続され、又は前記第1の熱交換手段が接続された管路に並列に接続され、補助熱源の熱を前記給水に熱交換する第2の熱交換手段と、
前記第2の熱交換手段の出側に設置され、熱交換で得られた温水に前記給水を混合させる混合手段と、
前記熱媒を熱媒管路内に循環させる循環ポンプと、
前記第1の熱交換手段の熱交換で給湯目標温度が得られる場合には前記第1の熱交換手段のみで熱交換を行わせ、又はこの熱交換で前記給湯目標温度が得られない場合には前記第1の熱交換手段及び前記第2の熱交換手段の双方又は前記第2の熱交換手段のみで熱交換を行わせ、前記第2の熱交換手段で熱交換を行わせる場合には、前記第2の熱交換手段の熱交換温度を高く設定し、前記混合手段で混合される前記給水に対する前記第2の熱交換手段の温水比率を低減させる制御手段と、
を備えることを特徴とする給湯装置。
First heat exchanging means for exchanging heat of the heat medium to feed water;
The second heat exchanging means connected in series to the first heat exchanging means or connected in parallel to the pipe line to which the first heat exchanging means is connected, and exchanging heat of the auxiliary heat source to the water supply. When,
A mixing means installed on the outlet side of the second heat exchanging means and mixing the feed water with the hot water obtained by heat exchange;
A circulation pump for circulating the heat medium in the heat medium pipe line;
When the hot water supply target temperature is obtained by heat exchange of the first heat exchange means, heat exchange is performed only by the first heat exchange means, or when the hot water supply target temperature is not obtained by this heat exchange. When heat is exchanged by both the first heat exchange means and the second heat exchange means or only by the second heat exchange means, and heat exchange is performed by the second heat exchange means, , said heat exchange temperature of the second heat exchange means is set high, the control means Ru reduce the hot water ratio of said second heat exchange means to said water supply to be mixed in the mixing means,
A hot water supply apparatus comprising:
熱媒の熱を給水に熱交換する第1の熱交換手段と、
この第1の熱交換手段に直列に接続され、又は前記第1の熱交換手段が接続された管路に並列に接続され、補助熱源の熱を前記給水に熱交換する第2の熱交換手段と、
前記第2の熱交換手段の出側に設置され、熱交換で得られた温水に前記給水を混合させる混合手段と、
前記熱媒を熱媒管路内に循環させる循環ポンプと、
媒温度を検出する第1の温度検出手段と、
前記第1の熱交換手段の通過水温度を検出する第2の温度検出手段と、
前記混合手段の入側の温水温度を検出する第3の温度検出手段と
記熱媒温度に第1の基準温度、前記第2の温度検出手段の通過水温度に第2の基準温度を設定し、前記第1の温度検出手段の検出温度が前記第1の基準温度より高ければ前記第1の熱交換手段を選択して前記給水に熱交換させ、前記第1の基準温度より低ければ前記第2の熱交換手段のみを選択して前記給水に熱交換させ、また、前記第1の熱交換手段を選択した場合であって、前記第2の基準温度が得られるように制御した前記熱媒の循環流量が所定量に達した場合は、前記第1の熱交換手段及び前記第2の熱交換手段を選択して前記給水に熱交換させる制御手段と、
を特徴とする給湯装置。
First heat exchanging means for exchanging heat of the heat medium to feed water;
The second heat exchanging means connected in series to the first heat exchanging means or connected in parallel to the pipe line to which the first heat exchanging means is connected, and exchanging heat of the auxiliary heat source to the water supply. When,
A mixing means installed on the outlet side of the second heat exchanging means and mixing the feed water with the hot water obtained by heat exchange;
A circulation pump for circulating the heat medium in the heat medium pipe line;
A first temperature detecting means for detecting the heat medium temperature,
Second temperature detection means for detecting the temperature of water passing through the first heat exchange means;
Third temperature detecting means for detecting the temperature of hot water on the entry side of the mixing means ;
The first reference temperature before Symbol heat medium temperature, the the passage water temperature of the second temperature detecting means sets the second reference temperature, the detected temperature is the first reference temperature of the first temperature sensing means If it is higher, the first heat exchanging means is selected to exchange heat with the water supply, and if it is lower than the first reference temperature, only the second heat exchanging means is selected to exchange heat with the water supply, and When the first heat exchanging means is selected and the circulating flow rate of the heating medium controlled to obtain the second reference temperature reaches a predetermined amount, the first heat exchanging means is selected. Control means for selecting the means and the second heat exchange means to exchange heat with the feed water ;
Hot water supply apparatus said.
更に、前記第1の熱交換手段及び前記第2の熱交換手段の管路をバイパスして前記混合手段に前記給水を流す第1のバイパス路と、
前記第2の熱交換手段の管路をバイパスし、前記第1の熱交換手段を通過した前記温水又は前記給水を前記混合手段に流す第2のバイパス路と、
前記第2の熱交換手段が設置された前記管路に設置され、該管路を開閉する第1の開閉手段と、
前記第2のバイパス路に設置され、該バイパス路を開閉する第2の開閉手段と、
を備えることを特徴とする請求項1又は2に記載の給湯装置。
Furthermore, a first bypass passage that bypasses the conduits of the first heat exchange means and the second heat exchange means and flows the water supply to the mixing means,
A second bypass passage for bypassing the pipe line of the second heat exchange means and flowing the hot water or the feed water that has passed through the first heat exchange means to the mixing means;
A first opening / closing means that is installed in the pipeline where the second heat exchange means is installed and opens and closes the pipeline;
A second opening / closing means installed in the second bypass path for opening and closing the bypass path;
The hot water supply apparatus according to claim 1 or 2 , further comprising:
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