JP6138550B2 - Heat source equipment - Google Patents

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JP6138550B2
JP6138550B2 JP2013075121A JP2013075121A JP6138550B2 JP 6138550 B2 JP6138550 B2 JP 6138550B2 JP 2013075121 A JP2013075121 A JP 2013075121A JP 2013075121 A JP2013075121 A JP 2013075121A JP 6138550 B2 JP6138550 B2 JP 6138550B2
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water
flow rate
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mixing ratio
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JP2014199165A (en
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誠 寺内
誠 寺内
翼 内山
翼 内山
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株式会社ガスター
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Description

本発明は、貯湯槽を備えた熱源装置に関するものである。   The present invention relates to a heat source device including a hot water storage tank.

貯湯槽を備えた熱源装置が用いられており(例えば、特許文献1、2、参照)、図3には、開発中の熱源装置が模式的なシステム構成図により示されている。同図において、貯湯槽2と出湯通路9とを備えた主熱源装置としてのタンクユニット4が、熱回収用通路3を介して燃料電池(FC)1と熱的に接続されている。燃料電池1は、例えば固体高分子型燃料電池(PEFC)等により形成されており、水の電気分解の逆反応で、都市ガス等の燃料から取り出された水素と空気中の酸素とを反応させて発電する発電装置である。   A heat source device having a hot water storage tank is used (see, for example, Patent Documents 1 and 2), and FIG. 3 shows a heat source device under development by a schematic system configuration diagram. In the figure, a tank unit 4 as a main heat source device including a hot water tank 2 and a hot water discharge passage 9 is thermally connected to a fuel cell (FC) 1 via a heat recovery passage 3. The fuel cell 1 is formed of, for example, a polymer electrolyte fuel cell (PEFC) or the like, and reacts hydrogen extracted from fuel such as city gas with oxygen in the air by reverse reaction of water electrolysis. It is a power generation device that generates electricity.

熱回収用通路3は、燃料電池1と貯湯槽2との間で液体(ここでは湯水)を図の矢印Aおよび矢印A’に示されるように循環させる通路であり、熱回収用通路3には、熱回収用通路3内に液体を循環させる図示されていないポンプが介設されている。そして、該ポンプの駆動により、貯湯槽2内の水を図の矢印A’に示すように熱回収用通路3を通して燃料電池1に導入して冷却水とし、この水を燃料電池1の発電時に生じる廃熱によって加熱した後、図の矢印Aに示すように熱回収用通路3を通し、例えば60℃といった温度の湯として貯湯槽2に蓄積する。なお、熱回収用通路3には、三方弁6を介してバイパス通路7が設けられ、燃料電池1側から貯湯槽2側へ流れる液体を、必要に応じて貯湯槽2を通さずに燃料電池1に戻すことができるように形成されている。   The heat recovery passage 3 is a passage that circulates liquid (here, hot water) between the fuel cell 1 and the hot water tank 2 as indicated by arrows A and A ′ in the figure. Is provided with a pump (not shown) for circulating the liquid in the heat recovery passage 3. Then, by driving the pump, the water in the hot water tank 2 is introduced into the fuel cell 1 through the heat recovery passage 3 as shown by an arrow A ′ in the figure to be cooling water, and this water is used when the fuel cell 1 generates power. After being heated by the generated waste heat, it passes through the heat recovery passage 3 as indicated by an arrow A in the figure, and accumulates in the hot water tank 2 as hot water having a temperature of 60 ° C., for example. The heat recovery passage 3 is provided with a bypass passage 7 through a three-way valve 6 so that the liquid flowing from the fuel cell 1 side to the hot water tank 2 side can be passed through the fuel cell without passing through the hot water tank 2 as necessary. It is formed so that it can be returned to 1.

貯湯槽2には、貯湯槽2内または貯湯槽2の外側壁に、貯湯槽2内の湯の温度を検出する貯湯槽内湯水温検出手段5が、貯湯槽2の上下方向に互いに間隔を介して複数(図3では5個)設けられている。なお、最上位に設けられている貯湯槽内湯水温検出手段5aは、貯湯槽2の上端よりも予め定められた設定長さだけ下側の位置、つまり、例えば貯湯槽2の上端まで湯が満たされた場合よりも20リットル少ない湯量の湯が貯湯槽2内に導入された場合の湯面の位置に設けられている。   In the hot water tank 2, hot water temperature detecting means 5 in the hot water tank 2 for detecting the temperature of the hot water in the hot water tank 2 is provided in the hot water tank 2 or on the outer wall of the hot water tank 2 with a space therebetween in the vertical direction of the hot water tank 2. A plurality (five in FIG. 3) are provided. The hot water temperature detection means 5a in the hot water tank provided at the top is filled with hot water up to a position lower than the upper end of the hot water tank 2 by a predetermined set length, that is, for example, to the upper end of the hot water tank 2. The amount of hot water 20 liters less than that of the hot water is provided at the position of the hot water surface when the hot water tank 2 is introduced.

貯湯槽2の上部側に接続されている出湯通路9は、貯湯槽2で形成された湯を出湯する(送水する)通路と成しており、出湯通路9には、出湯通路9を通る湯の温度を検出する貯湯槽出湯水温検出手段11と、出湯通路9を通して送水される湯の量を可変する貯湯槽出湯量調節器としてのタンク湯水混合器12と、出湯通路9を通しての湯の送水の有無を弁の開閉により切り替える貯湯槽出側湯水電磁弁としてのパイロット方式のタンク側電磁弁13とが介設されている。なお、同図には図示されていないが、貯湯槽2を備えた熱源装置には、貯湯槽2内の圧力が許容圧力を超えたときに該圧力を外部に逃がすための過圧逃がし弁が適宜の位置(例えば出湯通路9に接続された圧力逃がし用の通路等)に設けられている。   The hot water passage 9 connected to the upper side of the hot water storage tank 2 is a passage for discharging (watering) the hot water formed in the hot water storage tank 2, and the hot water passage 9 includes hot water passing through the hot water passage 9. Hot water supply temperature detecting means 11 for detecting the temperature of the hot water tank, a tank hot water / water mixer 12 as a hot water tank discharge hot water amount regulator for changing the amount of hot water supplied through the hot water passage 9, and hot water supply through the hot water supply passage 9. A pilot-type tank-side electromagnetic valve 13 is interposed as a hot-water tank outlet-side hot water electromagnetic valve that switches the presence or absence of the valve by opening and closing the valve. Although not shown in the figure, the heat source device having the hot water tank 2 has an overpressure relief valve for releasing the pressure to the outside when the pressure in the hot water tank 2 exceeds the allowable pressure. It is provided at an appropriate position (for example, a pressure relief passage connected to the hot water passage 9).

また、この熱源装置への給水通路8は給水通路8aと給水通路8bとに分岐され、一方側の給水通路8(8a)が貯湯槽2の下部側に接続されて、他方側の給水通路8(8b)は、合流部10で出湯通路9に合流するように形成されている。給水通路8bには、給水通路8bから合流部10側へ流れる水の量を可変するための給水量調節器としての水混合器14が介設されている。なお、図3はシステム構成図であるために水混合器14とタンク湯水混合器12とが離れた位置に記されているが、これらは、合流部10の付近に設けられていてもよい。また、給水通路8は上水道に接続される。   Further, the water supply passage 8 to the heat source device is branched into a water supply passage 8a and a water supply passage 8b, one water supply passage 8 (8a) is connected to the lower side of the hot water tank 2, and the other water supply passage 8 is connected. (8b) is formed so as to merge into the hot water passage 9 at the merging portion 10. In the water supply passage 8b, a water mixer 14 is interposed as a water supply amount regulator for changing the amount of water flowing from the water supply passage 8b to the junction 10 side. Since FIG. 3 is a system configuration diagram, the water mixer 14 and the tank hot water / water mixer 12 are illustrated at positions separated from each other, but these may be provided in the vicinity of the junction 10. The water supply passage 8 is connected to the water supply.

合流部10には、補助熱源装置としての給湯器16の湯水導入側が、湯水導入通路15を介して接続されており、湯水導入通路15には混合湯水温検出手段としての混合サーミスタ28(28a,28b)が介設されている。給湯器16は、通水する水を例えばガスバーナ(給湯バーナ)の燃焼熱により加熱する加熱手段としての給湯熱交換器17を備え、図の矢印Bに示されるように貯湯槽2から出湯通路9を通して送水される(タンクユニット4から送水される)湯を、図の矢印B”に示されるように、湯水導入通路15を介して給湯器16に導入して給湯熱交換器17で加熱する追い加熱の機能を有している。   A hot water introduction side of a water heater 16 as an auxiliary heat source device is connected to the junction 10 via a hot water introduction passage 15, and a mixed thermistor 28 (28 a, 28 a, 28) serving as a mixed hot water temperature detection means is connected to the hot water introduction passage 15. 28b) is interposed. The hot water heater 16 includes a hot water supply heat exchanger 17 as a heating means for heating the water to be passed by, for example, the combustion heat of a gas burner (hot water supply burner), and as shown by an arrow B in the figure, from the hot water tank 2 to the hot water passage 9. The hot water fed through the tank unit 4 (water fed from the tank unit 4) is introduced into the hot water heater 16 through the hot water introduction passage 15 and heated by the hot water heat exchanger 17 as indicated by an arrow B ″ in the figure. Has the function of heating.

この追い加熱機能により加熱された湯は、通路18と給湯通路19とを順に通って一つ以上の給湯先に給湯される。なお、同図には図示されていないが、給湯通路19の先端側には給湯栓が設けられており、この給湯栓を開くことにより、貯湯槽2に蓄えられていた湯が、給水圧を受けて出湯通路9を通り、前記の如く、給水通路8bからの水と混合されたり、給湯器16により追い加熱されたり,あるいは水の混合や追い加熱なしにそのまま給湯されたりする。また、周知の如く、給湯器16には、給湯熱交換器17を加熱する給湯バーナや給湯バーナへの空気の給排気を行う燃焼ファン等の適宜の構成要素(図示せず)が設けられ、その構成要素を制御することにより前記追い加熱機能の動作が行われるものである。   Hot water heated by the additional heating function passes through the passage 18 and the hot water supply passage 19 in order, and is supplied to one or more hot water supply destinations. Although not shown in the figure, a hot water tap is provided at the front end side of the hot water passage 19, and the hot water stored in the hot water storage tank 2 reduces the hot water pressure by opening the hot water tap. As described above, it is mixed with the water from the water supply passage 8b, heated by the hot water heater 16, or supplied without any mixing or additional heating. As is well known, the water heater 16 is provided with appropriate components (not shown) such as a hot water supply burner for heating the hot water supply heat exchanger 17 and a combustion fan for supplying and exhausting air to and from the hot water supply burner. The additional heating function is operated by controlling the components.

なお、図3の図中、符号25は入水温度サーミスタ、符号26は燃料電池1から貯湯槽2へ導入される湯水温検出用のFC高温サーミスタ、符号27は貯湯槽2から燃料電池1側へ導出される湯水温検出用のFC低温サーミスタをそれぞれ示し、符号29は給水流量センサ、符号30は給湯器16から浴槽31への注湯通路、符号32は暖房装置と給湯器16とを接続する暖房用通路、符号42は通路18と給湯通路19を通して給湯される給湯流量を検出する流量検出手段、符号50は減圧弁をそれぞれ示している。   In FIG. 3, reference numeral 25 denotes an incoming water temperature thermistor, reference numeral 26 denotes an FC high temperature thermistor for detecting hot water temperature introduced from the fuel cell 1 to the hot water tank 2, and reference numeral 27 denotes the hot water tank 2 to the fuel cell 1 side. Each of the FC low temperature thermistors for detecting the hot water temperature is shown. Reference numeral 29 is a feed water flow sensor, reference numeral 30 is a pouring passage from the hot water heater 16 to the bathtub 31, and reference numeral 32 is a connection between the heating device and the hot water heater 16. A heating passage, reference numeral 42 denotes a flow rate detecting means for detecting the flow rate of hot water supplied through the passage 18 and the hot water supply passage 19, and reference numeral 50 denotes a pressure reducing valve.

図4には、図3に示したシステム構成における配管および構成要素の一部を省略または破線で示したシステム構成図が示されており、図4に示されるように、前記通路18には分岐継手20を介して接続通路21の一端側が接続され、接続通路21の他端側は、熱回収用通路3において湯水を燃料電池1側から貯湯槽2側に通す通路の途中部に接続されている。また、熱回収用通路3において湯水を貯湯槽2側から燃料電池1側に通す通路の途中部と前記出湯通路9の先端側とを接続する接続通路22が設けられ、接続通路22には、湯水を循環させる循環ポンプ23と、水電磁弁24とが介設されている。   FIG. 4 shows a system configuration diagram in which some of the piping and components in the system configuration shown in FIG. 3 are omitted or shown by broken lines, and as shown in FIG. One end side of the connection passage 21 is connected via the joint 20, and the other end side of the connection passage 21 is connected to a middle portion of the passage through which the hot water passes from the fuel cell 1 side to the hot water tank 2 side in the heat recovery passage 3. Yes. In addition, a connection passage 22 is provided in the heat recovery passage 3 to connect a middle portion of the passage for passing hot water from the hot water storage tank 2 side to the fuel cell 1 side and the front end side of the hot water discharge passage 9. A circulation pump 23 for circulating hot water and a water solenoid valve 24 are interposed.

そして、通路18、接続通路21、熱回収用通路3のうちの通路3a、3b(接続通路21との接続部および接続通路22との接続部よりも貯湯槽2側の領域)と、バイパス通路7、接続通路22、湯水導入通路15を有して、同図の矢印Cに示されるように湯水を循環させる湯水循環通路40が形成されている。水電磁弁24は、循環ポンプ23の駆動による湯水循環通路40への水の循環の有無を弁の開閉により切り替える電磁弁であり、水電磁弁24を開いた状態で循環ポンプ23を駆動させて湯水循環通路40を循環する湯水を、給湯器16が給湯熱交換器17により加熱する循環湯水加熱機能を有している。この循環湯水加熱機能の動作も、給湯器16の前記構成要素を制御することにより行われる。   Of the passage 18, the connection passage 21, and the heat recovery passage 3, the passages 3 a and 3 b (regions closer to the hot water tank 2 than the connection portion with the connection passage 21 and the connection portion with the connection passage 22), and the bypass passage 7, a hot water circulation passage 40 is provided which has a connection passage 22 and a hot water introduction passage 15 and circulates hot water as indicated by an arrow C in the figure. The water electromagnetic valve 24 is an electromagnetic valve that switches the presence or absence of water circulation to the hot water circulation passage 40 by driving the circulation pump 23 by opening and closing the valve. The water electromagnetic valve 24 is opened to drive the circulation pump 23. The hot water supply device 16 has a circulating hot water heating function in which the hot water supply device 16 heats the hot water circulating through the hot water circulation passage 40 by the hot water supply heat exchanger 17. The operation of the circulating hot water heating function is also performed by controlling the components of the water heater 16.

なお、図3、図4において、加熱により温められた湯水が主に通る通路部分にはドットを記しており、湯水循環通路40においては温められた湯の温度が湯水循環通路40内を通るときに徐々に冷めていくが、湯水循環通路40のうち給湯器16の湯水導出側の通路18からバイパス通路7の入口までの領域にドットを記している。   In FIGS. 3 and 4, dots are marked in the passage portion through which hot water heated mainly by heating passes, and the temperature of the heated hot water passes through the hot water circulation passage 40 in the hot water circulation passage 40. In the hot water circulation passage 40, dots are marked in the region from the hot water outlet side passage 18 of the hot water heater 16 to the inlet of the bypass passage 7.

また、図3、図4に示す熱源装置には、図示されていない制御装置が設けられており、制御装置には、タンク湯水混合器12を制御して出湯通路9から合流部10側に流れる湯の流量を制御すると共に、水混合器14を制御して給水通路8bから合流部10側に流れる水の流量を制御し、合流部10で適宜の温度の混合湯水が形成されるようにするミキシング流量制御手段が設けられている。   Further, the heat source device shown in FIGS. 3 and 4 is provided with a control device (not shown). The control device controls the tank hot water / water mixer 12 to flow from the hot water passage 9 to the junction 10 side. In addition to controlling the flow rate of hot water, the water mixer 14 is controlled to control the flow rate of water flowing from the water supply passage 8b to the merging section 10 so that mixed hot water having an appropriate temperature is formed in the merging section 10. Mixing flow rate control means is provided.

このミキシング流量制御手段は、給湯停止時にはタンク側電磁弁13を閉じて、貯湯槽2から出湯通路9を通して合流部10側に流れる湯の流量がゼロとなる状態にする。また、給湯通路19の先端側に設けられている給湯栓が開かれて、給水流量センサ29がオン流量を検知すると、ミキシング流量制御手段はタンク電磁弁13を開き、タンク湯水混合器12を制御して図3の矢印Bに示されるように出湯通路9から合流部10側に流れる湯の流量を調節すると共に、水混合器14を制御して図3の矢印B’に示されるように給水通路8bから合流部10側に流れる水の流量を調節し、合流部10で形成される混合湯水の温度が混合設定温度になるようにする(混合設定温度は、例えば給湯設定温度と同じまたは給湯設定温度に近い温度に設定される)。   This mixing flow rate control means closes the tank-side electromagnetic valve 13 when hot water supply is stopped, so that the flow rate of hot water flowing from the hot water storage tank 2 through the hot water passage 9 to the junction 10 side becomes zero. When the hot water tap provided at the front end side of the hot water supply passage 19 is opened and the water supply flow rate sensor 29 detects the ON flow rate, the mixing flow rate control means opens the tank solenoid valve 13 and controls the tank hot water mixer 12. Then, the flow rate of hot water flowing from the tap water passage 9 to the junction 10 side is adjusted as indicated by the arrow B in FIG. 3, and the water mixer 14 is controlled to supply the water as indicated by the arrow B ′ in FIG. The flow rate of the water flowing from the passage 8b to the merging portion 10 side is adjusted so that the temperature of the mixed hot water formed in the merging portion 10 becomes the mixed set temperature (the mixed set temperature is the same as, for example, the hot water set temperature or hot water supply) Set to a temperature close to the set temperature).

また、例えば図5に示されるように、タンク湯水混合器12は、パルスモータであるステッピングモータ51のパルス数(ステップ数に対応)に応じてモータの軸55を図の矢印A方向およびB方向に進退させ、出湯通路9に連通する流路に設けられている弁52の開弁量(弁開度)を可変することにより湯の量を可変し、水混合器14も同様に、パルスモータであるステッピングモータ53のパルス数(ステップ数に対応)に応じてモータの軸56を図の矢印A方向およびB方向に進退させ、給水通路8bに連通する流路に設けられている弁54の開弁量を可変することにより水の量を可変する構成と成している。そこで、ミキシング流量制御手段は、これらのステッピングモータ51,53のステップ数を制御することにより、混合設定温度の混合湯水を形成する。なお、図5の矢印は水や湯の流れを示す。   For example, as shown in FIG. 5, the tank hot water / water mixer 12 moves the motor shaft 55 in the directions indicated by arrows A and B in accordance with the number of pulses (corresponding to the number of steps) of the stepping motor 51 which is a pulse motor. The amount of hot water is varied by varying the valve opening amount (valve opening degree) of the valve 52 provided in the flow path communicating with the hot water outlet passage 9, and the water mixer 14 is similarly a pulse motor. Of the valve 54 provided in the flow path communicating with the water supply passage 8b by advancing and retracting the motor shaft 56 in the directions indicated by arrows A and B in accordance with the number of pulses of the stepping motor 53 (corresponding to the number of steps). The amount of water is varied by varying the valve opening amount. Therefore, the mixing flow rate control means controls the number of steps of these stepping motors 51 and 53 to form mixed hot / cold water having a mixed set temperature. In addition, the arrow of FIG. 5 shows the flow of water or hot water.

なお、貯湯槽2内に貯湯されている湯水には、例えば図6の模式図に示されるような温度の層Wa、Wb、Wcが形成されるものであり、貯湯槽2の上部側の層(高温層)Waには燃料電池1の発電時に生じる廃熱によって加熱された高温Ta(例えば60℃)の湯が貯湯され、貯湯槽2の下部側の層(低温層)Wcには貯湯槽2内に給水される給水温度と同じ温度Tc(例えば15℃)の水が貯水されており、その間に、温度Taから温度Tcまでの急な温度勾配を持つ層(温度中間層)Wbがある。したがって、層Waの湯が無くなると湯の代わりに冷たい水が出湯通路9から送水されることがあるが、説明の都合上、特に断らない限り、出湯通路9からは湯が出湯されて前記合流部10に合流されるという表現を用いる。   Note that the hot water stored in the hot water tank 2 is formed with layers Wa, Wb, and Wc at temperatures as shown in the schematic diagram of FIG. (High temperature layer) Wa stores hot water of high temperature Ta (for example, 60 ° C.) heated by waste heat generated during power generation of the fuel cell 1, and a lower layer (low temperature layer) Wc of the hot water tank 2 stores a hot water tank. Water having the same temperature Tc (for example, 15 ° C.) as the temperature of the water supplied in 2 is stored, and there is a layer (temperature intermediate layer) Wb having a steep temperature gradient from temperature Ta to temperature Tc. . Accordingly, when there is no hot water in the layer Wa, cold water may be sent from the hot water outlet passage 9 instead of hot water, but for convenience of explanation, hot water is discharged from the hot water outlet passage 9 unless otherwise specified. The expression “merge to the part 10” is used.

例えば図6に示されるように、貯湯槽2内の湯水において、例えば層Waと層Wbとの境界が貯湯槽内湯水温検出手段5aの配設領域よりも下にあり、貯湯槽内湯水温検出手段5aの検出温度が給湯設定温度より例えば2℃高く設定される閾値より高い温度のときには、貯湯槽2から出湯される湯の温度は例えば60℃といったほぼ一定の値である。   For example, as shown in FIG. 6, in the hot water in the hot water tank 2, for example, the boundary between the layer Wa and the layer Wb is below the area where the hot water temperature detecting means 5a is provided in the hot water tank, and the hot water temperature detecting means in the hot water tank. When the detected temperature of 5a is higher than a threshold value set by 2 ° C. higher than the hot water supply set temperature, the temperature of the hot water discharged from the hot water storage tank 2 is a substantially constant value such as 60 ° C., for example.

そこで、前記ミキシング流量制御手段は、予め与えられている制御データに基づき、タンク湯水混合器12と水混合器14を制御することによって(タンク湯水混合器12と水混合器14のステッピングモータ51.53のステップ数を制御することによって)、出湯通路9から合流部10側に流れる湯(例えば60℃の湯)の流量と給水通路8bから合流部10側に流れる水の流量とを調節するミキシング流量フィードフォワード制御を行う。   Therefore, the mixing flow rate control means controls the tank hot water mixer 12 and the water mixer 14 based on the control data given in advance (the stepping motor 51. of the tank hot water mixer 12 and the water mixer 14). 53 by controlling the number of steps of 53), and adjusting the flow rate of hot water (for example, 60 ° C. hot water) flowing from the tap water passage 9 to the junction portion 10 and the flow rate of water flowing from the feed water passage 8b to the junction portion 10 side. Perform flow rate feedforward control.

その後、混合サーミスタ28(28a,28b)の検出温度と混合設定温度との差に基づいて、混合サーミスタ28(28a,28b)の検出温度が混合設定温度になるように、タンク湯水混合器12と水混合器14を制御して(タンク湯水混合器12と水混合器14のステッピングモータ51,53のステップ数を変更して)出湯通路9から合流部10側に流れる湯の流量と給水通路8bから合流部10側に流れる水の流量とを調節するミキシング流量フィードバック制御を行うことにより、合流部10で形成される混合湯水の温度調節を行う。なお、ミキシング流量フィードフォワード制御を行わずにミキシング流量フィードバック制御のみを行うようにしてもよい。   Then, based on the difference between the detected temperature of the mixed thermistor 28 (28a, 28b) and the set mixing temperature, the tank hot water / water mixer 12 is set so that the detected temperature of the mixed thermistor 28 (28a, 28b) becomes the mixed set temperature. By controlling the water mixer 14 (by changing the number of steps of the tank hot water mixer 12 and the stepping motors 51 and 53 of the water mixer 14), the flow rate of the hot water flowing from the hot water passage 9 to the junction 10 side and the water supply passage 8b The temperature of the mixed hot water formed at the merging portion 10 is adjusted by performing mixing flow rate feedback control for adjusting the flow rate of the water flowing from the merging portion 10 to the merging portion 10 side. Note that only the mixing flow rate feedback control may be performed without performing the mixing flow rate feedforward control.

そして、このようなキシング流量制御手段による制御によって、合流部10で形成される混合湯水の温度が混合設定温度(例えば給湯設定温度と同じ温度またはその近傍温度)とされると、その混合湯水は、図3の矢印B”に示されるように、合流部10から湯水導入通路15を通して給湯器16に導入されるが、このとき、給湯器16において給湯熱交換器17による加熱は行われずに、通路18と給湯通路19を通して給湯先に給湯される。   When the temperature of the mixed hot water formed in the merging portion 10 is set to the mixed set temperature (for example, the same temperature as the hot water supply set temperature or a temperature close thereto) by the control by the kissing flow rate control means, the mixed hot water is 3, as shown by an arrow B ″ in FIG. 3, the hot water is introduced from the junction 10 through the hot water introduction passage 15 into the hot water heater 16. At this time, the hot water heater 16 is not heated by the hot water heat exchanger 17. Hot water is supplied to the hot water supply destination through the passage 18 and the hot water supply passage 19.

一方、貯湯槽内湯水温検出手段5aの検出温度が前記閾値以下であり、ミキシング流量制御手段による流量制御のみでは、給湯設定温度と同等の温度に設定される混合設定温度の湯を給湯することができない場合には混合設定温度を、給湯設定温度から給湯器16のMIN号数(最小燃焼号数)で給湯流量の水を加熱したときに上昇する温度分を差し引いた値まで下げる。そして、その混合湯水が給湯器16の前記追い加熱機能の動作によって給湯熱交換器17により加熱されて給湯設定温度の湯が作り出され、この湯が通路18と給湯通路19を通して給湯先に給湯される。   On the other hand, the detected temperature of the hot water temperature detecting means 5a in the hot water tank is below the threshold value, and hot water having a mixed set temperature set to a temperature equivalent to the hot water set temperature can be supplied only by the flow rate control by the mixing flow rate control means. If not, the mixing set temperature is lowered to a value obtained by subtracting the temperature that rises when the hot water flow rate is heated at the MIN number (minimum combustion number) of the water heater 16 from the hot water supply set temperature. The mixed hot water is heated by the hot water supply heat exchanger 17 by the operation of the additional heating function of the hot water heater 16 to produce hot water having a hot water supply set temperature, and this hot water is supplied to the hot water supply destination through the passage 18 and the hot water supply passage 19. The

なお、従来は、タンクユニット4と給湯器16とが隣接配置されたタイプ(一体型)の熱源装置が用いられていたが、開発中の熱源装置は、タンクユニット4と給湯器16と燃料電池1とをそれぞれ個別に配置し、互いに配管により接続する個別配置型の熱源装置も可能とするものである。このようにすると、例えば複数種あるタンクユニット4のうち、利用者が必要な容量の貯湯槽2を備えたタンクユニット4を選択し、そのタンクユニット4と、複数種ある給湯器16のうち選択された給湯器16と、複数種ある燃料電池1のうち選択された燃料電池1とを組み合わせるといったことができ、バリエーションを増やすことができる。   Conventionally, a type (integrated type) heat source device in which the tank unit 4 and the water heater 16 are disposed adjacent to each other has been used. However, the heat source device under development includes the tank unit 4, the water heater 16, and the fuel cell. 1 can be individually arranged and connected to each other by pipes. If it does in this way, the tank unit 4 provided with the hot water storage tank 2 of the capacity | capacitance which a user requires among several types of tank units 4 will be selected, for example, and it will select among the tank units 4 and multiple types of water heaters 16 The water heater 16 thus made and the fuel cell 1 selected from the plural types of fuel cells 1 can be combined, and variations can be increased.

また、前記のような個別配置型の熱源装置は、既設の給湯器16にタンクユニット4等を接続して熱源装置を形成することもできるといったメリットもある。この場合、例えば給湯器16は建物の北側に配置されてタンクユニット4は建物の東側や西側に配置されるといったように、タンクユニット4と給湯器16とが離れて配置されることも想定されるが、そのような場合には、冬場等に、湯水導入通路15および接続通路21内の水が、給湯停止中に凍結することを防止するため等に、水電磁弁24を開いて循環ポンプ23を駆動させ、図4の矢印Cに示したように、湯水循環通路40に湯水を循環させながら給湯熱交換器17により加熱する前記循環湯水加熱機能の動作が適宜行われるような構成が必要になると考えられる。   Further, the individual arrangement type heat source device as described above has an advantage that the heat source device can be formed by connecting the tank unit 4 or the like to the existing water heater 16. In this case, it is assumed that the tank unit 4 and the water heater 16 are arranged apart from each other, for example, the water heater 16 is arranged on the north side of the building and the tank unit 4 is arranged on the east side or the west side of the building. However, in such a case, the water solenoid valve 24 is opened to prevent the water in the hot water introduction passage 15 and the connection passage 21 from freezing during the hot water supply stop in winter and the like. As shown by an arrow C in FIG. 4, the circulating hot water heating function for heating the hot water supply heat exchanger 17 while circulating hot water in the hot water circulation passage 40 is appropriately performed. It is thought that it becomes.

特許第3728265号公報Japanese Patent No. 3728265 特許第4095046号公報Japanese Patent No. 4095046

ところで、前記ミキシング流量制御手段によるタンク湯水混合器12と水混合器14の制御に際し、タンク湯水混合器12のステッピングモータ51と水混合器14のステッピングモータ53とを、例えば必要に応じて一方を駆動させて他方は駆動させないようにしたりして、ステッピングモータ51,53による各開弁量の変更タイミングを必要に応じて個別に制御したり、ステッピングモータ51,53を両方同時に駆動させ、その駆動時によって必要に応じステップ数を変更したりするといったように、ステッピングモータ51とステッピングモータ53とを個別に駆動させ、タンク湯水混合器12の開弁量と水混合器の開弁量とを個別に制御すれば(先行文献1等、参照)、混合設定温度の混合湯水を形成するための調整制御を適切に行うことができると考えられる。   By the way, when the tank hot water mixer 12 and the water mixer 14 are controlled by the mixing flow rate control means, the stepping motor 51 of the tank hot water mixer 12 and the stepping motor 53 of the water mixer 14 are set to one, for example, as necessary. The other is controlled by changing the timing of changing the valve opening amounts by the stepping motors 51 and 53, or by driving both of the stepping motors 51 and 53 at the same time. The stepping motor 51 and the stepping motor 53 are individually driven so that the number of steps is changed as needed, and the opening amount of the tank hot water mixer 12 and the opening amount of the water mixer are individually set. If it controls to (refer to prior art literature 1 etc.), adjustment control for forming mixed hot and cold water of mixing preset temperature is appropriate It is believed that it is possible to carry out.

しかし、本願発明者は、より簡単な制御を可能とするために、混合設定温度に対応させて合流部10に導入される湯と水の混合比を設定し、一つの混合比に対しては、タンク湯水混合器12のステッピングモータ51のステップ数と水混合器14のステッピングモータ53のステップ数をそれぞれ固定値として設定して同時に駆動させる制御を考えている。   However, in order to enable simpler control, the inventor of the present application sets the mixing ratio of hot water and water introduced into the merging section 10 corresponding to the mixing set temperature, and for one mixing ratio, A control is considered in which the number of steps of the stepping motor 51 of the tank hot-water mixer 12 and the number of steps of the stepping motor 53 of the water mixer 14 are set as fixed values and driven simultaneously.

以下、この制御構成について詳細に述べる。例えば図5において、タンク湯水混合器12と水混合器14のステッピングモータ51,53のステップ数が多いほど、その軸55,56と共に弁52,54が図の右側(図の矢印A方向)に移動する構成となっていて、タンク湯水混合器12と水混合器14が共にステッピングモータ51,53のステップ数が多いほど開弁量が大きくなるように形成されているとする。   Hereinafter, this control configuration will be described in detail. For example, in FIG. 5, as the number of steps of the stepping motors 51 and 53 of the tank hot water mixer 12 and the water mixer 14 increases, the valves 52 and 54 together with the shafts 55 and 56 are located on the right side of the figure (in the direction of arrow A in the figure). It is assumed that both the tank hot water mixer 12 and the water mixer 14 are formed so that the valve opening amount increases as the number of steps of the stepping motors 51 and 53 increases.

この場合、図15(a)の特性線a、bにそれぞれ示されるように、混合湯水の各設定温度(各混合設定温度)に対する湯と水の弁開度に基づく予定混合比(以下、混合比という)と各ステッピングモータ51,53のステップ数とが比例するような制御データ(例えば表1、参照)を与えることが考えられる。なお、表1の数値は各ステッピングモータ51,53のパルス数を示しており(水側パルス数はステッピングモータ53のパルス数、湯側パルス数はステッピングモータ51のパルス数)、ステップ数1にはパルス数1224が対応し、ステップ数255にはパルス数3672が対応するといったように、ステップ数とパルス数とは対応する。例えば、ステッピングモータ51のステップ数が1ならばステッピングモータ53のステップ数は255、ステッピングモータ51のステップ数が128ならばステッピングモータ53のステップ数は128、ステッピングモータ51のステップ数が255ならばステッピングモータ53のステップ数は1のように、タンク湯水混合器12と水混合器14のステップ特性を制御データとして与えることが考えられる。   In this case, as shown by the characteristic lines a and b in FIG. 15A, a predetermined mixing ratio based on the valve opening degree of hot water and water (hereinafter referred to as mixing) It is conceivable to give control data (see Table 1, for example) such that the ratio) is proportional to the number of steps of each stepping motor 51, 53. The numerical values in Table 1 indicate the number of pulses of each of the stepping motors 51 and 53 (the number of water side pulses is the number of pulses of the stepping motor 53, the number of hot water side pulses is the number of pulses of the stepping motor 51). Corresponds to the number of pulses 1224, the number of steps 255 corresponds to the number of pulses 3672, and so on. For example, if the number of steps of the stepping motor 51 is 1, the number of steps of the stepping motor 53 is 255, if the number of steps of the stepping motor 51 is 128, the number of steps of the stepping motor 53 is 128, and the number of steps of the stepping motor 51 is 255. It is conceivable that the step characteristics of the stepping motor 53 are given as the control data as the step characteristics of the tank hot water / water mixer 12 and the water mixer 14 such as 1.

Figure 0006138550
Figure 0006138550

なお、図15(a)において、その横軸に示されている湯と水の混合比は、混合設定温度が図の右側に向かうにつれて低く設定されることに対応して、図の右側に向かうにつれて水の混合比が大きくなって湯の混合比が小さくなるものである。例えば混合設定温度A、B、C(A<B<C)にそれぞれ対応させた混合比がMA、MB、MCであり、MBにおける湯と水の混合比が1:1であるとすると、MAにおける湯と水の混合比は水の方が湯より大きくなり(湯:水=1:m、m>1となり)、その逆に、MCにおける湯と水の混合比は湯の方が水より大きくなる(湯:水=n:1、n>1となる)。   In FIG. 15A, the mixing ratio of hot water and water shown on the horizontal axis goes to the right side of the figure corresponding to the fact that the mixing set temperature is set lower as it goes to the right side of the figure. As the mixing ratio of water increases, the mixing ratio of hot water decreases. For example, if the mixing ratios corresponding to the mixing set temperatures A, B, and C (A <B <C) are MA, MB, and MC, respectively, and the mixing ratio of hot water and water in MB is 1: 1, MA The mixing ratio of hot water to water in water is larger than that of hot water (hot water: water = 1: m, m> 1), and conversely, the mixing ratio of hot water to water in MC is higher than that of water. Increased (hot water: water = n: 1, n> 1).

そして、特性線aに示されるように、湯と水の混合比のうち湯の混合比が小さくなるにつれて(図の右側に向かうにつれて)湯側であるタンク湯水混合器12のステッピングモータ51のステップ数を混合比に比例させて小さくし、一方、図の右側に向かうにつれて湯と水の混合比のうち水の混合比は大きくなるので、水側である水混合器14のステッピングモータ53のステップ数は混合比に比例させて大きくする。   Then, as indicated by the characteristic line a, the step of the stepping motor 51 of the tank hot water / water mixer 12 on the hot water side becomes smaller as the hot water mixing ratio of the hot water / water mixing ratio becomes smaller (toward the right side in the figure). The number is reduced in proportion to the mixing ratio. On the other hand, the water mixing ratio of the mixing ratio of hot water and water increases toward the right side of the drawing, so the stepping motor 53 of the water mixer 14 on the water side is stepped. The number is increased in proportion to the mixing ratio.

そうすると、タンク湯水混合器12と水混合器14のそれぞれの開弁量(開口面積)は、ステッピングモータ51,53のステップ数に対応してステップ数が大きくなるほど大きくなり、ステップ数が小さくなるほど小さくなるため、水圧が一定であれば、図15(b)の特性線aに示される湯の流量はステッピングモータ51のステップ数に比例し、図の右側に向かうにつれて混合比に比例して小さくなり、特性線bに示される水の流量はステッピングモータ53のステップ数に比例し、図の右側に向かうにつれて混合比に比例して大きくなる。つまり、この場合は、ステッピングモータ51,53のステップ数が湯と水の混合比に比例することから、湯と水の混合比と湯と水の流量比(混合流量比)とが一致するので、混合設定温度設定に対応する混合比となるようにステッピングモータ51,53のステップ数を合わせる制御を行えば、混合設定温度の混合湯水が形成されることになる。   Then, the valve opening amounts (opening areas) of the tank hot water mixer 12 and the water mixer 14 increase as the number of steps increases corresponding to the number of steps of the stepping motors 51 and 53, and decrease as the number of steps decreases. Therefore, if the water pressure is constant, the flow rate of hot water indicated by the characteristic line a in FIG. 15B is proportional to the number of steps of the stepping motor 51 and decreases in proportion to the mixing ratio toward the right side of the figure. The flow rate of water indicated by the characteristic line b is proportional to the number of steps of the stepping motor 53 and increases in proportion to the mixing ratio toward the right side of the figure. That is, in this case, since the number of steps of the stepping motors 51 and 53 is proportional to the mixing ratio of hot water and water, the mixing ratio of hot water and water matches the flow ratio of hot water and water (mixing flow ratio). If the control is performed to adjust the number of steps of the stepping motors 51 and 53 so that the mixing ratio corresponds to the mixing set temperature setting, the mixed hot water of the mixing set temperature is formed.

しかしながら、開発中の熱源装置のように、貯湯槽2と出湯通路9とを通った湯に給水通路8bを通った水を合流部10で混合して混合湯水を形成する場合には、以下に述べるように、流路の水圧変化に起因して、湯と水の混合比と湯と水の流量比とが必ずしも一致しない。   However, when the hot water that has passed through the hot water tank 2 and the hot water outlet passage 9 is mixed with the water that has passed through the water supply passage 8b at the junction 10 to form mixed hot water, as in the heat source device under development, As will be described, the mixing ratio of hot water and water does not necessarily match the flow rate ratio of hot water and water due to the change in water pressure in the flow path.

つまり、図3に示したように、この熱源装置においては、給水通路8が給水通路8a,8bに分岐され、一方の給水通路8aを通った水が貯湯槽2に貯湯されて湯となって出湯通路9とを通って合流部10に導入され、他方の給水通路8bを通った水が合流部10に導入される。このように、給水通路8bに設けられている水混合器14に流れる水とタンク湯水混合器12に流れる水(湯も含む)の水圧源が共通している場合、給水通路8a,8bの分岐点では共通の同一水圧となっているが、水が給水通路8a,8bおよび貯湯槽2や出湯通路9を通る際に水圧抵抗(流路抵抗)を受けて減圧し、水混合器14を通る水の水圧とタンク湯水混合器12を通る水の水圧は共に、前記分岐点での水圧よりも減圧する。   That is, as shown in FIG. 3, in this heat source device, the water supply passage 8 is branched into the water supply passages 8a and 8b, and the water passing through one of the water supply passages 8a is stored in the hot water storage tank 2 as hot water. The water passing through the hot water passage 9 is introduced into the junction 10, and the water passing through the other water supply passage 8 b is introduced into the junction 10. Thus, when the water pressure source of the water (including hot water) flowing in the water mixer 14 provided in the water supply passage 8b and the water (including hot water) flowing in the tank hot water mixer 12 is common, the water supply passages 8a and 8b are branched. However, when water passes through the water supply passages 8a and 8b, the hot water storage tank 2 and the hot water passage 9, the water pressure resistance (flow passage resistance) is received and the water pressure is reduced. Both the water pressure of the water and the water pressure of the water passing through the tank hot water mixer 12 are lower than the water pressure at the branch point.

なお、同一給水温度、同一貯湯槽出湯水温度、混合後の設定温度が同一ならば、タンク湯水混合器12と水混合器14を通る湯水の総量(総水量=湯+水)が大きいときには、タンク湯水混合器12を通る水量も多く、タンク湯水混合器12と水混合器14の流路抵抗に大きな差がないために前記減圧の程度に大きな差がないが、タンク湯水混合器12と水混合器14を通る湯水の総量(総水量=湯+水)が小さいときにはタンク湯水混合器12を通る水量が少なくなり、タンク湯水混合器12の流路抵抗が大きくなって湯量が減る。この結果、同一混合比を維持すると、混合後の温度が変わってしまう。   In addition, if the same feed water temperature, the same hot-water storage hot water temperature, and the set temperature after mixing are the same, when the total amount of hot water passing through the tank hot water mixer 12 and the water mixer 14 (total water amount = hot water + water) is large, The amount of water passing through the tank hot water / water mixer 12 is large, and there is no great difference in the flow path resistance between the tank hot water / water mixer 12 and the water mixer 14, so there is no big difference in the degree of decompression. When the total amount of hot water passing through the mixer 14 (total water amount = hot water + water) is small, the amount of water passing through the tank hot water / mixer 12 decreases, the flow resistance of the tank hot water / mixer 12 increases, and the amount of hot water decreases. As a result, if the same mixing ratio is maintained, the temperature after mixing changes.

換言すれば、貯湯槽2を設けて、その貯湯槽2を介して湯を給湯(出湯)する構成においては、給湯流量(湯と水の総流量)が少ない場合、図16(a)の特性線aに示されるように、湯の混合比が小さい領域において湯の流量が大きく減少してしまい、湯の混合比に対して湯の流量比が非常に小さくなってしまうといった現象が生じる。なお、図16(a)の特性線bに示されるように、給湯流量が少なくても、水混合器14側は貯湯槽2を介さないために、前記のような給湯流量の影響を殆ど受けず、水の混合比と水の流量比とが比例する。   In other words, in the configuration in which the hot water storage tank 2 is provided and hot water is supplied through the hot water storage tank 2 (outflow of hot water), when the hot water supply flow rate (total flow rate of hot water and water) is small, the characteristics shown in FIG. As shown by the line a, the flow rate of hot water is greatly reduced in the region where the mixing ratio of hot water is small, and the phenomenon that the flow rate of hot water becomes very small with respect to the mixing ratio of hot water occurs. As shown by the characteristic line b in FIG. 16 (a), even if the hot water flow rate is small, the water mixer 14 side does not go through the hot water storage tank 2, and thus is hardly affected by the hot water flow rate as described above. The water mixing ratio and the water flow ratio are proportional.

また、貯湯槽2を介して湯を給湯する構成においても、給湯流量が多いときには、湯と水の混合比と湯および水の流量との関係が、図15(b)の特性線a、bに示されるようになり、給湯流量が中程度(図15(b)と図16(a)の中間位)のときには、湯と水の混合比と湯および水の流量との関係が、図15(c)の特性線a、bに示されるようになり、いずれも、特性線aに示される湯の流量と特性線bに示される水の流量が湯と水の混合比に比例して直線的に変化する値となることから、湯と水の混合比と湯と水の流量比とが一致する。   Also, in the configuration in which hot water is supplied via the hot water tank 2, when the flow rate of hot water is large, the relationship between the mixing ratio of hot water and water and the flow rate of hot water and water is shown by the characteristic lines a and b in FIG. When the hot water supply flow rate is moderate (intermediate position in FIG. 15 (b) and FIG. 16 (a)), the relationship between the mixing ratio of hot water and water and the flow rate of hot water and water is shown in FIG. In (c), characteristic lines a and b are shown, and in both cases, the flow rate of hot water indicated by characteristic line a and the flow rate of water indicated by characteristic line b are linear in proportion to the mixing ratio of hot water and water. Therefore, the mixing ratio of hot water and water coincides with the flow rate ratio of hot water and water.

また、開発中の熱源装置において、貯湯槽2の給水側には、給水流量センサ29の下流側で給水流量センサ29の近傍位置に減圧弁50を設けて貯湯槽2に例えば370KPa(3.7Kg/cm )以上の圧力がかからないようにしているため、貯湯槽2の水塊を少ない水量で動かそうとしても動きにくい状況に加え、弱い力(制限された給水圧)で水塊を動かさなければならず、総水量(総水量=湯+水)が中水量域でも動きにくくなる。この結果、貯湯槽2を経由してタンク湯水混合器12に流れる湯は水混合器14を通る水よりも流れにくく(動きにくく)、貯湯槽2を経由して流れる湯の量が極端に少なくなる流量域が広がる。 Further, in the heat source device under development, a pressure reducing valve 50 is provided on the water supply side of the hot water tank 2 on the downstream side of the water supply flow rate sensor 29 and in the vicinity of the water supply flow rate sensor 29, so / Cm 2 ) Since the pressure is not applied, the water mass in the hot water tank 2 should not be moved even if it tries to move with a small amount of water, and the water mass must be moved with a weak force (limited water supply pressure). The total water volume (total water volume = hot water + water) becomes difficult to move even in the middle water volume range. As a result, the hot water flowing through the hot water tank 2 to the tank hot water mixer 12 is less likely to flow (more difficult to move) than the water passing through the water mixer 14, and the amount of hot water flowing through the hot water tank 2 is extremely small. Expands the flow rate range.

つまり、減圧弁50を設けることにより、減圧弁50を設けない構成に比べて給水圧が低くなると、前記のようにタンク湯水混合器12と水混合器14とに通す湯水の総量が小さいときにタンク湯水混合器12の流路抵抗が大きくなって減圧量が大きくなり通過する湯の流量が小さくなるだけでなく、前記総水量が中程度であっても同様に、前記のように湯の流量が小さくなる傾向が現れ、給湯流量が中程度の場合でも、例えば図17(b)の特性線a’に示されるように、給湯流量が小さいときと同様に、湯の混合比に対して湯の流量が小さくなりやすくなる(前記のような湯の流量が減少する現象が生じる給湯流量域が広がる)。   That is, by providing the pressure reducing valve 50, when the feed water pressure is lower than in the configuration without the pressure reducing valve 50, the total amount of hot water passing through the tank hot water mixer 12 and the water mixer 14 is small as described above. Not only does the flow resistance of the tank hot water / mixer 12 increase and the amount of pressure reduction increases, the flow rate of hot water passing through decreases, but also the flow rate of hot water as described above even when the total water volume is medium. Even when the hot water supply flow rate is moderate, as shown by the characteristic line a ′ in FIG. 17B, for example, the hot water flow rate is small with respect to the hot water mixing ratio, as shown by the characteristic line a ′ in FIG. The flow rate of the hot water tends to be small (the hot water supply flow rate region in which the phenomenon that the flow rate of the hot water decreases as described above occurs) is increased.

なお、この場合も、図17(b)の特性線bに示されるように、水混合器14側では給湯流量の影響を殆ど受けず、水の混合比と水の流量比とが比例する。また、このように、貯湯槽2と減圧弁50とを設ける構成においては、給湯流量が多いときの湯と水の流量特性は、図17(a)の特性線a、bにそれぞれ示されるように、ほぼ直線的ではあるが、湯の混合比が100%に近くなり弁開度が最大に近づくと湯の流量が頭打ちになり、同様に、水の混合比が100%に近くなり弁開度が最大に近づくと水の流量が頭打ちになる。   Also in this case, as shown by the characteristic line b in FIG. 17B, the water mixer 14 side is hardly affected by the hot water supply flow rate, and the water mixing ratio and the water flow rate ratio are proportional. Further, in the configuration in which the hot water storage tank 2 and the pressure reducing valve 50 are provided in this way, the flow rate characteristics of hot water and water when the hot water supply flow rate is large are shown by the characteristic lines a and b in FIG. However, when the mixing ratio of hot water is close to 100% and the valve opening is close to the maximum, the flow rate of hot water reaches a peak, and similarly, the mixing ratio of water is close to 100% and the valve is opened. When the degree approaches the maximum, the water flow reaches a peak.

また、減圧弁50を設けると、例えば減圧弁50の配設位置(貯湯槽2の配置位置)と同等あるいは、それより下の高さの場所に浴室がある場合にはシャワーが快適に使用できるが、減圧弁50の配設位置(貯湯槽2の配置位置)よりも高い場所に浴室がある場合(例えば貯湯槽2が1階に対応する高さの屋外に配設されて2階に浴室がある場合等)には差圧が取れずに、混合比と湯の流量との関係が、図16(a)の特性線aに示したような、給湯流量が少ない場合の特性に近くなる。   Further, when the pressure reducing valve 50 is provided, for example, a shower can be used comfortably when there is a bathroom at a location equal to or lower than the position where the pressure reducing valve 50 is disposed (position where the hot water tank 2 is disposed). However, when there is a bathroom in a place higher than the position where the pressure reducing valve 50 is disposed (position where the hot water tank 2 is disposed) (for example, the hot water tank 2 is disposed outdoors at a height corresponding to the first floor and the bathroom is located on the second floor) In other cases, the differential pressure cannot be obtained, and the relationship between the mixing ratio and the flow rate of hot water is close to the characteristic when the flow rate of hot water supply is small as shown by the characteristic line a in FIG. .

さらに、パイロット方式の電磁弁は湯の量が小さくなると弁が十分に開かず、前記のように、貯湯槽2を介して湯を給湯する構成において給湯流量(湯と水の総流量)が少ない場合に生じる、図16(a)の特性線aに示したような湯の流量が極端に少なくなる現象が現れ、出湯通路9側にパイロット方式の電磁弁により形成されたタンク側電磁弁13を設けることにより、より強力に発生する。   Furthermore, the pilot-type solenoid valve does not open sufficiently when the amount of hot water becomes small, and the hot water supply flow rate (total flow rate of hot water and water) is small in the configuration in which hot water is supplied through the hot water storage tank 2 as described above. The phenomenon in which the flow rate of the hot water as shown by the characteristic line a in FIG. 16 (a) is extremely reduced appears in the case, and the tank side electromagnetic valve 13 formed by a pilot type electromagnetic valve is provided on the hot water outlet passage 9 side. By providing, it is generated more powerfully.

そのため、湯の経路に貯湯槽2と減圧弁50とパイロット方式の電磁弁(タンク側電磁弁13)とが設けられている開発中の熱源装置においては、図17(b)の特性線aに示されるように、図16(a)の特性線aと同様に湯の流量が極端に少なくなる現象が給湯流量が中程度のときにも生じることになる(湯の流量比は図17(c)の特性線a、参照)。そして、減圧弁50の配設位置(貯湯槽2の配置位置)と同等あるいは、それより下の高さの場所に浴室がある場合でも、前記のような現象が発生しやすい。   Therefore, in the heat source device under development in which the hot water storage tank 2, the pressure reducing valve 50, and the pilot type electromagnetic valve (tank side electromagnetic valve 13) are provided in the hot water path, the characteristic line a in FIG. As shown in FIG. 16 (a), the phenomenon that the flow rate of hot water becomes extremely small occurs even when the hot water supply flow rate is medium (the flow rate ratio of hot water is shown in FIG. 17 (c). (See characteristic line a). And even if there is a bathroom at a location equal to or lower than the position where the pressure reducing valve 50 is disposed (position where the hot water tank 2 is disposed), such a phenomenon is likely to occur.

つまり、前記のような現象とは、貯湯槽2側を経由する湯と貯湯槽2を経由しないでショートカットする(給水通路8bから直接合流部10に流れる)水が合流することによる、総水量が少ないときに貯湯槽2側を経由する湯が出なくなる点と全く同様の現象のことであり、この現象は、大流量、小流量の如何にかかわらず発生するのではなく、小流量時のみ強く湯の流量が影響を受けて小さくなることから、給湯流量が小さいと、パイロット方式の電磁弁を設けることによって湯の流量がより減少しやすくなり、また、減圧弁50を設けた上にパイロット方式の電磁弁を設けると、給湯流量が中程度であっても影響を受けて、図17(b)特性線aに示されるように、湯の流量が減少する。   That is, the phenomenon as described above is the total amount of water due to the combination of hot water passing through the hot water storage tank 2 and water that does not pass through the hot water storage tank 2 (flowing directly from the water supply passage 8b to the merging section 10). This is exactly the same phenomenon as when hot water passes through the hot water tank 2 when it is low, and this phenomenon does not occur regardless of whether the flow rate is large or small. Since the flow rate of hot water is affected and becomes small, if the hot water supply flow rate is small, the flow rate of hot water is more likely to be reduced by providing a pilot-type electromagnetic valve, and the pilot method is provided after the pressure reducing valve 50 is provided. When the solenoid valve is provided, the hot water flow rate decreases as shown by the characteristic line a in FIG.

なお、図17(b)の特性線a”は、湯の経路に減圧弁50もパイロット方式の電磁弁も設けない場合における給湯流量が中程度のときの湯の流量(貯湯槽2のみ湯の経路に設けられている場合の例)を示し、図17(b)の特性線a’は、減圧弁50を設けてパイロット方式の電磁弁は設けない場合における給湯流量が中程度のときの湯の流量を示す。   Note that the characteristic line a ″ in FIG. 17B shows the hot water flow rate when the hot water supply flow rate is medium in the case where neither the pressure reducing valve 50 nor the pilot type solenoid valve is provided in the hot water path (only the hot water storage tank 2 is heated. The characteristic line a ′ in FIG. 17B shows hot water when the flow rate of hot water is medium when the pressure reducing valve 50 is provided and the pilot type solenoid valve is not provided. Shows the flow rate.

そして、前記のような給湯流量が小さく、かつ、湯の混合比が小さい場合に湯の流量が大きく減少する現象が生じると(図16(a)の特性線a、参照)、例えば図16(c)の特性線Qに示されるように、湯と水を合わせた総流量(混合湯水の流量)が、湯と水の混合によっては極端に小さくなることが生じる。 Then, when the hot water flow rate is small and the hot water mixing ratio is small, a phenomenon in which the hot water flow rate greatly decreases (see characteristic line a in FIG. 16A), for example, FIG. as shown by the characteristic line Q 3 of c), the total flow rate of the combined hot water (mixed hot water flow rate) results can become extremely small by mixing hot water and water.

また、シャワーを使用する混合比は、例えば湯と水の流量が同程度であるため、図16(a)の特性線a’に示されるように、湯の流量が湯の混合比に比例して変化する場合には図のUgの辺りとなるが、湯の実際の流量が特性線aに示されるようになると湯と水の流量が同じ点はUrに移動し、この点Urに対応する混合比における総流量は、図16(c)の特性線Qの矢印で示されるように大きく落ち込み、シャワーで使用したい湯の流量(同図のAの流量)を確保することができず、利用者の使い勝手が悪くなってしまうといった問題があった。 Further, the mixing ratio using the shower is, for example, that the flow rates of hot water and water are approximately the same, so that the flow rate of hot water is proportional to the mixing ratio of hot water, as shown by the characteristic line a ′ in FIG. However, when the actual flow rate of hot water becomes as indicated by the characteristic line a, the point where the flow rates of hot water and water are the same moves to Ur, and corresponds to this point Ur. the total flow rate in the mixing ratio can not drop significantly as indicated by arrows in the characteristic line Q 3 in FIG. 16 (c), the securing of hot water to be used in the shower flow rate (the flow rate of the drawing a), There was a problem that user convenience deteriorated.

なお、図16(b)には、給湯流量が前記のように小さいときの、混合比に対する湯の流量比(特性線a)と水の流量比(特性線b)を示しており、これらの流量比は、流量が最大となる時の流量比(図のR)を基準として求めた湯の流量比と水の流量比であり、湯の流量比が水の流量比と同じになる点Urgの点Urrへの移動が矢印により示されている。また、図16(c)の特性線Qは給湯流量が同図のCに示されるように多いときの湯と水の総流量、特性線Qは給湯流量が同図のBに示されるように中程度のときの湯と水の総流量をそれぞれ示しており、前記のように給湯流量が中程度のときにも湯の減少が生じると、特性線Qに示されるように総流量も落ち込む(特性線Q’は減圧弁50を設けてパイロット方式の電磁弁は設けない場合の湯の流量を示す)。 FIG. 16B shows the flow rate ratio of hot water (characteristic line a) and the flow rate ratio of water (characteristic line b) with respect to the mixing ratio when the hot water supply flow rate is small as described above. The flow rate ratio is the flow rate ratio of hot water and the flow rate of water obtained on the basis of the flow rate ratio (R in the figure) when the flow rate becomes maximum, and the point Urg at which the flow rate ratio of hot water is the same as the flow rate ratio of water. The movement to the point Urr is indicated by an arrow. The total flow rate of the hot water when so large characteristic line to Q 1 FIG. 16 (c) is hot water flow rate is shown in C of the figure, characteristic curve Q 2 is the hot water flow rate is shown in B of FIG. indicates respectively the total flow rate of the hot water and water at a moderate as, the decrease of the hot water even when hot water flow rate is medium, as described above occurs, the total flow rate as shown by the characteristic line Q 2 (Characteristic line Q 2 ′ indicates the flow rate of hot water when the pressure reducing valve 50 is provided and the pilot type solenoid valve is not provided).

本発明は、上記課題を解決するためになされたものであり、その目的は、給水圧が低くても貯湯槽から出湯される湯と給水通路から供給される水を混合して形成される混合湯水の流量をほぼ一定に保ちながらほぼ設定温度の湯を供給できるような使い勝手のよい熱源装置を提供することにある。   The present invention has been made in order to solve the above-mentioned problems, and its purpose is to mix hot water discharged from a hot water tank and water supplied from a water supply passage even when the water supply pressure is low. An object of the present invention is to provide an easy-to-use heat source device capable of supplying hot water at a substantially set temperature while keeping the flow rate of hot water substantially constant.

本発明は上記目的を達成するために、次の構成をもって課題を解決する手段としている。すなわち、第1の発明は、貯湯槽と、該貯湯槽からの湯水を送水する出湯通路と、該出湯通路と給水通路とが合流する合流部とを備え、該合流部に前記出湯通路側から流れる湯の量を可変する貯湯槽出湯量調節手段と、前記給水通路から前記合流部に流れる水の量を可変する給水量調節手段と、該給水量調節手段と前記貯湯槽出湯量調節手段を制御することにより該貯湯槽出湯量調節手段により可変される湯の流量と前記給水量調節手段により可変される水の流量を制御して前記合流部で混合湯水を形成するミキシング流量制御手段とを有し、給水温度と貯湯槽出湯水温度に対応させて前記混合湯水の各設定温度に対する湯と水の混合比と各混合比に対する湯量制御と水量制御の操作量との関係データが制御データとして予め与えられ、該制御データに基づいて前記ミキシング流量制御手段が前記混合湯水の設定温度に対応する混合比から湯量制御と水量制御の操作量をそれぞれ求め、その求めた操作量で前記貯湯槽出湯量調節手段と前記給水量調節手段を制御することにより前記設定温度の混合湯水を作り出す構成と成しており、前記合流部側に流れる湯の流路の開口量比を前記混合比に一致させる操作量の値で前記制御データの各混合比における湯量制御の操作量を与えたときに前記合流部に導入される湯の流量が前記湯の流路の水圧変化に起因して前記混合比に相当する流量よりも小さくなる分を補うように、前記制御データの各混合比における水量制御の操作量が前記合流部側に流れる水の流路の開口量比を前記混合比に一致させる操作量よりも水流量を増加させる方向に補正した値で与えられているか、前記制御データの各混合比における湯量制御の操作量が前記合流部側に流れる湯の流路の開口量比を前記混合比に一致させる操作量よりも湯流量を増加させる方向に補正した値で与えられているかの少なくとも一方であり、前記ミキシング流量制御手段により形成される前記混合湯水の流量の前記設定温度範囲における変動量が許容範囲内の変動量となるように制御される構成と成すと共に、前記制御データの各混合比における湯量制御の操作量は混合比の変化に対して湯の混合比が小さくなるにつれて湯の流量を小さくする方向に変化させる値で与えられ、前記制御データの各混合比における水量制御の操作量は混合比の変化に対して水の混合比が大きくなるにつれて水の流量を大きくする方向に変化値で与えられており、前記水量制御の操作量が水流量を増加させる方向に補正した値で与えられているときには前記湯の流路の水圧変化に起因して前記湯の流量が混合比に相当する流量よりも小さくなる分を補う方向に前記水量制御の操作量の変化割合を曲線的に変化させる値で与えられており、前記湯量制御の操作量が湯流量を増加させる方向に補正した値で与えられているときには湯の流路の水圧変化に起因して湯の流量が混合比に相当する流量よりも小さくなる分を補う方向に前記湯量制御の操作量の変化割合を曲線的に変化させる値で与えられている構成をもって課題を解決する手段としている。 In order to achieve the above object, the present invention has the following configuration as means for solving the problems. That is, the first invention comprises a hot water storage tank, a hot water supply passage for supplying hot water from the hot water storage tank, and a merge portion where the hot water supply passage and the water supply passage join, and the merge portion from the hot water supply passage side is provided. A hot water tank discharge amount adjusting means for changing the amount of flowing hot water, a water supply amount adjusting means for changing the amount of water flowing from the water supply passage to the junction, a water supply amount adjusting means and the hot water tank discharge amount adjusting means. And a mixing flow rate control means for controlling the flow rate of hot water changed by the hot water tank discharge amount adjusting means and the flow rate of water changed by the feed water amount adjusting means to form mixed hot water at the junction. The control data is the relation data between the hot water and water mixing ratio for each set temperature of the mixed hot water corresponding to the feed water temperature and the hot water temperature of the hot water storage tank, and the operation amount of the hot water control and water control for each mixing ratio. Given in advance Based on the data, the mixing flow rate control means obtains an operation amount of hot water amount control and water amount control from the mixing ratio corresponding to the set temperature of the mixed hot water, respectively, and the hot water tank discharge hot water amount adjustment means and the water supply with the obtained operation amounts It is configured to create the mixed hot water at the set temperature by controlling the amount adjusting means, and the operation amount value that matches the opening ratio of the flow path of the hot water flowing to the merging portion side with the mixing ratio. The flow rate of hot water introduced into the junction is less than the flow rate corresponding to the mixing ratio due to a change in the water pressure in the flow path of the hot water when an operation amount for hot water control at each mixing ratio in the control data is given. In order to compensate for this, the water flow control operation amount at each mixing ratio of the control data increases the water flow rate more than the operation amount that matches the opening ratio of the flow path of the water flowing to the merging portion side with the mixing ratio. In the direction The hot water flow rate is greater than the operation amount that is given as a correct value or the operation amount of the hot water amount control at each mixing ratio of the control data matches the opening amount ratio of the flow path of hot water flowing to the merging portion side. The amount of fluctuation in the set temperature range of the flow rate of the mixed hot water formed by the mixing flow rate control means becomes the amount of fluctuation within an allowable range. well as the structure and formed to be controlled so that the operation amount of hot water control in each mixing ratio of the control data is changed in a direction to decrease the flow rate of hot water as the mixing ratio of the hot water is reduced to a change in mixing ratio The operation amount of the water amount control at each mixing ratio in the control data is given as a change value in the direction of increasing the water flow rate as the water mixing ratio increases with respect to the change in the mixing ratio. When the operation amount of the water amount control is given as a value corrected in the direction of increasing the water flow rate, the flow rate of the hot water corresponds to the mixing ratio due to the change in the water pressure in the flow path of the hot water. The change rate of the operation amount of the water amount control is given as a curve in a direction that compensates for the amount smaller than the flow rate, and the operation amount of the hot water amount control is a value corrected in the direction of increasing the hot water flow rate. When it is given, the rate of change of the operation amount of the hot water amount control is changed in a curve in a direction to compensate for the amount of the hot water flow rate smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure of the hot water flow path. It is a means to solve the problem with the configuration given by value .

さらに、第の発明は、前記第1の発明の構成に加え、前記貯湯槽出湯量調節手段はパルスモータのパルス数に応じて弁の開弁量を可変することにより湯の量を可変し、給水量調節手段はパルスモータのパルス数に応じて弁の開弁量を可変することにより水の量を可変する構成と成しており、制御データにおける湯量制御の操作量と水量制御の操作量は共にパルス数で与えられ、かつ、一つの混合比に対しては湯量制御の操作量に対応するパルス数と水量制御の操作量に対応するパルス数がそれぞれ固定値として設定されていることを特徴とする。 Further, in the second invention, in addition to the configuration of the first invention, the hot water storage tank discharge amount adjusting means varies the amount of hot water by varying the valve opening amount in accordance with the number of pulses of the pulse motor. The water supply amount adjusting means is configured to vary the amount of water by varying the valve opening amount in accordance with the number of pulses of the pulse motor, and the operation amount of the hot water amount control and the operation of the water amount control in the control data The amount is given by the number of pulses, and for one mixing ratio, the number of pulses corresponding to the operation amount of the hot water amount control and the number of pulses corresponding to the operation amount of the water amount control are set as fixed values, respectively. It is characterized by.

さらに、第の発明は、前記第1または第2の発明の構成に加え、前記出湯通路には該出湯通路を通しての貯湯槽からの湯を出湯の有無を弁の開閉により切り替える開閉電磁弁が介設され、該開閉電磁弁はパイロット方式の電磁弁により形成されていることを特徴とする。 Furthermore, in the third aspect of the invention, in addition to the configuration of the first or second aspect of the invention, there is an open / close solenoid valve that switches the hot water from the hot water storage tank through the hot water passage to the presence or absence of the hot water by opening and closing the valve. The open / close solenoid valve is formed of a pilot-type solenoid valve.

さらに、第の発明は、前記第1乃至第のいずれか一つの発明の構成に加え、前記合流部には該合流部で形成された混合湯水を導入して給湯熱交換器で加熱する追い加熱機能を有する補助熱源装置の湯水導入側が接続されており、前記合流部で形成される混合湯水の温度が前記混合設定温度より低いときに前記補助熱源装置による追い加熱機能による加熱によって前記混合設定温度の湯水を形成する構成と成していることを特徴とする。 Furthermore, the fourth aspect of the invention adds to the structure of any one of the first to third aspects of the invention, and introduces the mixed hot water formed at the merging portion into the merging portion and heats it with the hot water supply heat exchanger. When the hot water introduction side of the auxiliary heat source device having the additional heating function is connected and the temperature of the mixed hot water formed in the junction is lower than the set mixing temperature, the mixing is performed by heating by the additional heating function by the auxiliary heat source device It is characterized by having a configuration for forming hot water at a set temperature.

本発明によれば、貯湯槽からの湯と給水通路からの水の合流部で形成する混合湯水の湯と水の流量をミキシング流量制御手段により制御するが、その制御のための制御データとして、給水温度と貯湯槽出湯水温度に対応させて前記混合湯水の各設定温度に対する湯と水の混合比と各混合比に対する湯量制御と水量制御の操作量との関係データが予め与えられている。ミキシング流量制御手段は、その制御データに基づき、混合湯水の設定温度に対応する混合比から湯量制御と水量制御の操作量をそれぞれ求め、その求めた操作量で前記貯湯槽出湯量調節手段と前記給水量調節手段を制御するが、制御データを以下に述べるような特徴的な制御データとし、その制御データに基づいて混合湯水の各設定温度に対応する湯量制御と水量制御を行うことにより、前記設定温度の混合湯水を、給湯流量分、作り出すことができる。   According to the present invention, the mixing flow rate control means controls the flow rate of the hot water of the mixed hot water formed at the junction of the hot water from the hot water storage tank and the water from the water supply passage, and as control data for the control, Corresponding to the feed water temperature and the hot water temperature of the hot water storage tank, relational data of the mixing ratio of hot water and water with respect to each set temperature of the mixed hot water, the amount control of hot water with respect to each mixing ratio, and the operation amount of the water amount control are given in advance. Based on the control data, the mixing flow rate control means obtains the operation amount of the hot water amount control and the water amount control from the mixing ratio corresponding to the set temperature of the mixed hot water, respectively, Although the water supply amount adjusting means is controlled, the control data is characteristic control data as described below, and by performing hot water control and water volume control corresponding to each set temperature of the mixed hot water based on the control data, Mixed hot water at a set temperature can be produced for the hot water flow rate.

つまり、本発明のように貯湯槽を設けた熱源装置において、制御データの各混合比における湯量制御の操作量を、前記合流部側に流れる湯の流路の開口量比を前記混合比に一致させる操作量の値で与えたときには、前記の如く、給湯流量(湯と水を合わせた総流量)が小さく、かつ、湯の混合比が小さい場合等に、水圧変化に起因して、合流部に導入される湯の流量が合流部に導入される湯と水の混合比に比べて極端に小さくなってしまうが(図16(a)の特性線a、参照)、制御データの各混合比における湯量制御の操作量と水量制御の操作量を以下のように特徴的な値とすることによって、その分を補う方向に制御できる。   That is, in the heat source apparatus provided with the hot water storage tank as in the present invention, the operation amount of the hot water amount control in each mixing ratio of the control data is matched with the opening ratio of the flow path of the hot water flowing to the merging portion side. When the operation amount is given as a value, when the hot water supply flow rate (total flow rate including hot water and water) is small and the mixing ratio of hot water is small, the junction portion is caused by the change in water pressure. Although the flow rate of hot water introduced into the water becomes extremely smaller than the mixing ratio of hot water and water introduced into the junction (see characteristic line a in FIG. 16A), each mixing ratio of control data By making the operation amount of the hot water amount control and the operation amount of the water amount control as characteristic values as follows, the amount can be controlled in a direction to compensate for that.

つまり、本発明では、合流部側に流れる湯の流路の開口量比を混合比に一致させる操作量の値で前記制御データの各混合比における湯量制御の操作量を与えたときに前記合流部に導入される湯の流量が前記湯の流路の水圧変化に起因して前記混合比に相当する流量よりも小さくなる分を補うように、湯量制御の操作量と水量制御の操作量の少なくとも一方を増加させる方向に補正した値で与えることにより、水圧変化に起因して合流部に導入される湯の流量が合流部に導入される湯と水の混合比に比べて極端に小さくなってしまう分を、湯流量または水流量を増加させて補う方向に制御できるので、利用者が給湯栓を操作して出そうとしている給湯の流量に比べて給湯流量が極端に小さくなるといったことを防ぐことができ、給湯流量を安定化できる。   That is, according to the present invention, when the operation amount of hot water amount control at each mixing ratio of the control data is given by an operation amount value that matches the opening amount ratio of the flow path of hot water flowing to the merging portion side with the mixing ratio, the merging The amount of operation of the hot water amount control and the amount of operation of the water amount control are so compensated that the flow rate of the hot water introduced into the section is smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure in the flow path of the hot water. By giving at least one of the values corrected in the increasing direction, the flow rate of the hot water introduced into the joining portion due to the change in water pressure becomes extremely smaller than the mixing ratio of hot water and water introduced into the joining portion. The amount of hot water flow can be controlled by increasing the hot water flow rate or the water flow rate, so that the hot water flow rate becomes extremely small compared to the flow rate of hot water that the user is trying to operate by operating the hot water tap. Can prevent and stabilize the hot water flow rate It can be.

例えば、本発明において、制御データの各混合比における湯量制御の操作量は混合比の変化に対して湯の混合比が小さくなるにつれて湯の流量を小さくする方向に変化させる値で与えられ、前記制御データの各混合比における水量制御の操作量は混合比の変化に対して水の混合比が大きくなるにつれて水の流量を大きくする方向に変化値で与えられるが、前記水量制御の操作量が水流量を増加させる方向に補正した値で与えられるときには、前記湯の流路の水圧変化に起因して前記湯の流量が混合比に相当する流量よりも小さくなる分を補う方向に前記水量制御の操作量の変化割合を曲線的に変化させる値で与える。   For example, in the present invention, the operation amount of hot water control at each mixing ratio of the control data is given as a value that changes the flow rate of hot water as the mixing ratio of hot water decreases with respect to the change of the mixing ratio, The operation amount of the water amount control at each mixing ratio of the control data is given as a change value in the direction of increasing the flow rate of the water as the water mixing ratio increases with respect to the change of the mixing ratio. When given as a value corrected in the direction of increasing the water flow rate, the water amount control in a direction to compensate for the flow rate of the hot water being smaller than the flow rate corresponding to the mixing ratio due to a change in water pressure in the flow path of the hot water. The change rate of the manipulated variable is given as a value that changes in a curve.

一方、前記湯量制御の操作量が湯流量を増加させる方向に補正した値で与えるときには、湯の流路の水圧変化に起因して湯の流量が混合比に相当する流量よりも小さくなる分を補う方向に前記湯量制御の操作量の変化割合を曲線的に変化させる値で与える。これらのように、制御データの各混合比における湯量制御の操作量と水量制御の操作量の一方を、混合比の変化に対して直線的に変化させずに、前記合流部に導入される湯の流量が前記合流部に導入される湯と水の流量比を前記混合比に一致させたときの湯の流量に対して水圧変化に起因して小さくなる不足分を補う方向に操作量の変化割合を曲線的に変化させる値で与えることにより、前記の如く、水圧変化に起因して小さくなる不足分を補うことができ、湯と水とを合わせた総流量が水圧変化に起因して極端に小さくなる領域を無くし、給湯流量の安定化を図ることができる。   On the other hand, when the operation amount of the hot water amount control is given as a value corrected in the direction of increasing the hot water flow rate, the amount of hot water flow is smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure of the hot water flow path. The change rate of the operation amount of the hot water control is given as a value that changes in a curve in the direction of compensation. As described above, the hot water introduced into the merging section is not linearly changed with respect to the change in the mixing ratio, with one of the operation amount of the hot water control and the operation amount of the water control at each mixing ratio of the control data. Change in manipulated variable in a direction to compensate for a shortage caused by a change in water pressure with respect to the flow rate of hot water when the flow rate of hot water and water introduced into the merging section matches the mixing ratio By giving the ratio with a value that changes in a curve, as described above, it is possible to compensate for the shortage that becomes smaller due to a change in water pressure, and the total flow rate of hot water and water is extremely high due to a change in water pressure. Therefore, it is possible to stabilize the hot water flow rate.

したがって、ミキシング流量制御手段により形成される前記混合湯水の流量の前記設定温度範囲における変動量が許容範囲内の変動量となるように制御され、シャワー使用時等に給湯流量が落ち込んで使い勝手が悪くなることを防ぐことができ、使い勝手の良好な熱源装置を実現できる。   Therefore, the fluctuation amount in the set temperature range of the flow rate of the mixed hot water formed by the mixing flow rate control unit is controlled to be within a permissible range, and the hot water flow rate drops when using a shower or the like, resulting in poor usability. Therefore, it is possible to realize a heat source device that is easy to use.

また、貯湯槽出湯量調節手段はパルスモータのパルス数に応じて弁の開弁量を可変することにより湯の量を可変し、給水量調節手段はパルスモータのパルス数に応じて弁の開弁量を可変することにより水の量を可変する構成と成し、制御データにおける湯量制御の操作量と水量制御の操作量を共にパルス数で与え、一つの混合比に対しては、湯量制御の操作量に対応するパルス数と水量制御の操作量に対応するパルス数をそれぞれ固定値として設定することにより、貯湯槽出湯量調節手段の操作量と給水量調節手段の操作量を混合比に対して個別に操作する場合に比べて制御を簡単にできる。   Further, the hot water tank discharge amount adjusting means varies the amount of hot water by varying the valve opening amount according to the number of pulses of the pulse motor, and the water supply amount adjusting means opens the valve according to the number of pulses of the pulse motor. The amount of water is made variable by changing the valve amount, and the amount of hot water control and the amount of water control in the control data are both given by the number of pulses. By setting the number of pulses corresponding to the operation amount of the water and the number of pulses corresponding to the operation amount of the water amount control as fixed values, respectively, the operation amount of the hot water tank discharge amount adjusting means and the operation amount of the water supply amount adjusting means are adjusted to the mixing ratio. On the other hand, the control can be simplified as compared with the case of operating individually.

さらに、出湯通路に、該出湯通路を通しての貯湯槽からの湯を出湯の有無を弁の開閉により切り替える開閉電磁弁を介設することにより、出湯通路からの出湯の有無の制御を容易に行え、かつ、その開閉電磁弁をパイロット方式の電磁弁により形成することにより、低消費電力で小型で安価なパイロット方式の電磁弁の適用によって熱源装置のコストダウンを図ることができる。なお、前記のような、給湯流量が小さくて湯の混合比が小さい場合に、合流部に導入される湯の流量が水圧変化に起因して合流部に導入される湯と水の混合比に比べて極端に小さくなってしまう現象は、前記開閉電磁弁としてパイロット方式の電磁弁を適用した場合に生じやすいが、前記の如く、本発明は、このような現象による給湯流量の変動を小さくできるので支障なく、使い勝手の良好な熱源装置を実現できる。   Furthermore, the presence or absence of hot water from the hot water passage can be easily controlled by providing an open / close solenoid valve for switching the hot water from the hot water storage tank through the hot water passage to the presence or absence of hot water by opening and closing the valve. In addition, by forming the open / close solenoid valve with a pilot-type solenoid valve, it is possible to reduce the cost of the heat source device by applying a pilot-type solenoid valve with low power consumption, small size, and low cost. In addition, when the flow rate of hot water supply is small and the mixing ratio of hot water is small as described above, the flow rate of hot water introduced into the merging portion is equal to the mixing ratio of hot water and water introduced into the merging portion due to a change in water pressure. The phenomenon of becoming extremely small in comparison is likely to occur when a pilot-type solenoid valve is applied as the open / close solenoid valve. However, as described above, the present invention can reduce fluctuations in the hot water supply flow rate due to such a phenomenon. Therefore, it is possible to realize a heat source device that is easy to use without any trouble.

さらに、合流部には該合流部で形成された混合湯水を導入して給湯熱交換器で加熱する追い加熱機能を有する補助熱源装置の湯水導入側を接続して、合流部で形成される混合湯水の温度が前記混合設定温度より低いときに前記補助熱源装置による追い加熱機能による加熱することによって、たとえ混合設定温度よりも低い温度の湯が形成されても、その湯を追い加熱することにより温度を高めて給湯することができる。つまり、このような補助熱源装置を設けることにより、貯湯槽内の湯温が混合設定温度(例えば給湯設定温度と同じ温度)より低くなった場合にも、また、ミキシング流量制御手段による制御によって水が多めに混合されて混合湯水の温度が混合設定温度より低く形成された場合にも、補助熱源装置による追い加熱で補って給湯できる。   Furthermore, the hot water supply side of the auxiliary heat source device having a supplementary heating function for introducing the mixed hot water formed in the confluence portion and heating it with the hot water supply heat exchanger is connected to the confluence portion, and the mixing formed in the confluence portion By heating with the additional heating function by the auxiliary heat source device when the temperature of the hot water is lower than the mixing set temperature, even if hot water having a temperature lower than the mixing set temperature is formed, the hot water is further heated. Hot water can be supplied at an elevated temperature. That is, by providing such an auxiliary heat source device, even when the hot water temperature in the hot water storage tank becomes lower than the mixed set temperature (for example, the same temperature as the hot water supply set temperature), the water is also controlled by the mixing flow control means. Even when a large amount of water is mixed and the temperature of the mixed hot water is lower than the set mixing temperature, the hot water can be supplemented by additional heating by the auxiliary heat source device.

本発明に係る熱源装置の一実施例の制御構成を示すブロック図である。It is a block diagram which shows the control structure of one Example of the heat-source apparatus which concerns on this invention. 第1実施例の熱源装置に与えられる制御データ例(a)と、その制御データでの制御時の混合比に対する湯と水の各流量特性例(b)、(c)と総流量特性例(d)を模式的に示すグラフである。Example of control data (a) given to the heat source device of the first embodiment, examples of flow characteristics (b) and (c) of hot water and water with respect to the mixing ratio at the time of control with the control data, and examples of total flow characteristics ( It is a graph which shows d) typically. 実施例および開発中の熱源装置のシステム構成例を説明するための説明図である。It is explanatory drawing for demonstrating the system configuration example of the heat source apparatus in an Example and development. 図3に示す熱源装置に設けられている湯水循環通路と貯湯槽の出湯通路とを説明するために、図3の一部構成を簡略化して示すシステム構成図である。FIG. 4 is a system configuration diagram showing a partial configuration of FIG. 3 in a simplified manner in order to explain a hot water circulation passage and a hot water discharge passage of a hot water storage tank provided in the heat source device shown in FIG. 3. タンク湯水混合器と水混合器の構成を模式的に示す断面説明図である。It is sectional explanatory drawing which shows typically the structure of a tank hot-water mixer and a water mixer. 貯湯槽内の温度層の分布例を模式的に示す説明図である。It is explanatory drawing which shows typically the example of distribution of the temperature layer in a hot water storage tank. 第2実施例の熱源装置に与えられる制御データ例(a)と、その制御データでの制御時の混合比に対する湯と水の各流量特性例(b)、(c)と総流量特性例(d)を模式的に示すグラフである。Example (a) of control data given to the heat source device of the second embodiment, examples of flow characteristics (b) and (c) of hot water and water with respect to the mixing ratio at the time of control with the control data, and examples of total flow characteristics ( It is a graph which shows d) typically. 図7(a)に示した制御データでの制御時の湯と水の混合比に対する湯の流量比と水の流量比を模式的に示すグラフである。It is a graph which shows typically the flow rate ratio of the hot water with respect to the mixing ratio of the hot water and water at the time of control by the control data shown to Fig.7 (a), and the flow rate ratio of water. 湯流量増加制御と水量増加制御を共に行う制御例を、これらの増加制御を行わない場合の制御例と共に示すグラフである。It is a graph which shows the control example which performs both hot water flow volume increase control and water volume increase control with the control example when not performing these increase control. 熱源装置の合流部で混合する湯と水の混合比レベルと各混合比レベルに対しての湯の流量割合との関係例を給湯流量毎に示すグラフである。It is a graph which shows the relationship example of the flow rate ratio of the hot water with respect to each mixing ratio level and the mixing ratio level of the hot water and water mixed in the junction part of a heat-source apparatus for every hot water supply flow rate. 第2実施例の熱源装置において合流部で混合する湯と水の混合比レベルと各混合比レベルに対しての湯の流量割合と水の流量割合の関係を給湯流量毎に示すグラフである。It is a graph which shows the relationship between the flow rate ratio of hot water and the flow rate ratio of hot water with respect to each mixing ratio level and the flow rate ratio of water for each hot water supply flow rate in the heat source device of the second embodiment. 第2実施例の熱源装置において合流部で混合する湯と水の混合比レベルと各混合比レベルに対しての湯の流量割合と水の流量割合の関係を給湯流量毎に示すグラフである。It is a graph which shows the relationship between the flow rate ratio of hot water and the flow rate ratio of hot water with respect to each mixing ratio level and the flow rate ratio of water for each hot water supply flow rate in the heat source device of the second embodiment. 第2実施例における湯と水の混合比レベルシフト動作例を説明するためのグラフである。It is a graph for demonstrating the mixing ratio level shift operation example in the 2nd Example. 熱源装置に与えられる他の制御データ例を模式的に示すグラフである。It is a graph which shows typically the example of other control data given to a heat source device. 熱源装置に与えられる制御データ例(a)と、その制御データでの制御時の混合比に対する湯と水の各流量特性例(b)、(c)を模式的に示すグラフである。It is a graph which shows typically control data example (a) given to a heat source device, and each flow rate characteristic example (b) and (c) of hot water and water to the mixture ratio at the time of control by the control data. 図15(a)の制御データでの制御時の、混合比に対する湯と水の各流量特性例(a)と流量比特性例(b)と総流量特性例(d)を模式的に示すグラフである。Graph showing schematically each flow rate characteristic example (a), flow ratio characteristic example (b), and total flow characteristic example (d) with respect to the mixing ratio at the time of control with the control data of FIG. It is. 図15(a)の制御データでの制御時の、混合比に対する湯と水の各流量特性の別の例(a)、(b)と流量比特性の別の例(c)を模式的に示すグラフである。FIG. 15A schematically shows another example (a) and (b) of each flow rate characteristic of hot water and water with respect to the mixing ratio and another example (c) of the flow rate characteristic at the time of control with the control data of FIG. It is a graph to show.

以下、本発明の実施の形態を図面に基づき説明する。なお、本実施例の説明において、これまでの説明の例と同一構成要素には同一符号を付し、その重複説明は省略または簡略化する。   Hereinafter, embodiments of the present invention will be described with reference to the drawings. In the description of the present embodiment, the same reference numerals are given to the same constituent elements as those in the above-described examples, and the duplicate description is omitted or simplified.

図1には、本発明に係る熱源装置の第1実施例のシステム構成が模式的に示されている。本実施例は、図3に示した熱源装置と同様のシステム構成を有し、さらに、図1に示されるように、タンクユニット内の制御装置33に、ミキシング流量制御手段35、混合設定温度設定手段36、メモリ部37を設けている。また、制御装置33には給湯器16の制御装置46とリモコン装置43とが信号接続され、リモコン装置43には給湯設定温度設定操作手段45が設けられ、給湯器16の制御装置46には給湯燃焼制御手段47が設けられている。なお、リモコン装置43は、屋内において、リビングや、浴室、台所、洗面所等の適宜の場所に設置されている。 FIG. 1 schematically shows a system configuration of a first embodiment of the heat source apparatus according to the present invention. This embodiment has the same system configuration as that of the heat source device shown in FIG. 3, and further, as shown in FIG. 1, the controller 33 in the tank unit 4 includes a mixing flow rate control means 35, a mixing set temperature. Setting means 36 and a memory unit 37 are provided. The control device 33 is connected to the control device 46 of the water heater 16 and the remote control device 43 by signal, the remote control device 43 is provided with a hot water supply set temperature setting operation means 45, and the control device 46 of the water heater 16 is supplied with hot water supply. Combustion control means 47 is provided. The remote control device 43 is installed indoors at an appropriate place such as a living room, a bathroom, a kitchen, or a washroom.

給湯設定温度設定操作手段45は、利用者等により給湯設定温度を設定するための操作手段であり、例えばリモコン装置43の表面側に設けられている操作ボタン等により形成されている。この給湯設定温度設定操作手段45により設定された給湯設定温度の値は、制御装置33の混合設定温度設定手段36と給湯器16の燃焼制御手段47とに加えられる。   The hot water supply set temperature setting operation means 45 is an operation means for setting a hot water supply set temperature by a user or the like, and is formed by an operation button or the like provided on the surface side of the remote control device 43, for example. The value of the hot water set temperature set by the hot water set temperature setting operation means 45 is added to the mixture set temperature setting means 36 of the control device 33 and the combustion control means 47 of the hot water heater 16.

混合設定温度設定手段36は、混合湯水の設定温度(混合設定温度)を設定するものであり、例えば貯湯槽内湯水温検出手段5aの検出温度が前記閾値よりも高い温度のときの給湯時の前記混合設定温度を給湯設定温度に対応させて、給湯設定温度の値と同じ値または、それより0.5℃といった温度だけ高めに設定する。なお、混合設定温度設定手段36は、貯湯槽内湯水温検出手段5aの検出温度が前記閾値以下の時には、混合設定温度を給湯設定温度よりも低い適宜の温度に設定する。混合設定温度設定手段36によって設定された混合設定温度は、ミキシング流量制御手段35に加えられる。   The mixed set temperature setting means 36 sets a set temperature (mixed set temperature) of the mixed hot water. For example, the hot water supply temperature when the detected temperature of the hot water temperature detecting means 5a in the hot water tank is higher than the threshold value. The mixed set temperature is set to the same value as the hot water set temperature or higher by 0.5 ° C. than the set hot water set temperature. Note that the mixing set temperature setting means 36 sets the mixing set temperature to an appropriate temperature lower than the hot water supply setting temperature when the temperature detected by the hot water tank temperature detection means 5a is equal to or lower than the threshold value. The mixed set temperature set by the mixed set temperature setting means 36 is applied to the mixing flow rate control means 35.

ミキシング流量制御手段35は、合流部10側に出湯通路9から流れる湯の流量と給水通路8bから合流部10側に流れる水の流量を制御し、混合設定温度設定手段36により設定される設定混合温度の混合湯水が合流部10で形成されるようにするものである。ミキシング流量制御手段35は、前記の如く、タンク側電磁弁13の開閉制御とタンク湯水混合器12および水混合器14の制御による湯の流量と水の流量との制御により、合流部10で形成される混合湯水の温度が混合設定温度となるように制御する。   The mixing flow rate control means 35 controls the flow rate of hot water flowing from the outlet passage 9 to the junction 10 side and the flow rate of water flowing from the water supply passage 8b to the junction 10 side, and is set by the set mixing temperature setting means 36. The mixed hot and cold water is formed at the junction 10. As described above, the mixing flow rate control means 35 is formed in the junction 10 by controlling the opening and closing of the tank side electromagnetic valve 13 and the flow rate of hot water and the flow rate of water by the control of the tank hot water mixer 12 and the water mixer 14. Control is performed so that the temperature of the mixed hot water to be set becomes the mixing set temperature.

このミキシング流量制御手段35の制御に際し、本実施例では、以下に述べるような、給水温度と貯湯槽出湯水温度に対応させた、混合湯水の各設定温度に対する湯と水の混合比と各混合比に対する湯量制御と水量制御の操作量との特徴的な関係データが、ミキシング流量のフィードフォワード的な制御の制御データとして予め与えられ、メモリ部37に格納されている。なお、貯湯槽出湯水温度は例えば60℃であり、この制御データは、図2(a)に示すような、湯と水の混合比と、湯量制御と水量制御の操作量としてのステッピングモータ51,53のステップ数との関係データにより与えられている。本実施例において、タンク湯水混合器12と水混合器14は共に、ステッピングモータ51,53のステップ数が多いほど開弁量が大きくなるように形成されている。   In controlling the mixing flow rate control means 35, in this embodiment, the mixing ratio of hot water and water for each set temperature corresponding to the feed water temperature and the hot water storage hot water temperature as described below, and the respective mixings are described. Characteristic relationship data between the hot water control and the operation amount of the water control with respect to the ratio is given in advance as control data for feed-forward control of the mixing flow rate, and stored in the memory unit 37. Note that the temperature of the hot water storage tank tapping water is, for example, 60 ° C., and the control data includes a mixing ratio of hot water and water, and a stepping motor 51 as an operation amount of hot water control and water control as shown in FIG. , 53 is given by relational data with the number of steps. In this embodiment, both the tank hot water mixer 12 and the water mixer 14 are formed so that the valve opening amount increases as the number of steps of the stepping motors 51 and 53 increases.

図2(a)の特性線aに示されるように、制御データの各混合比における湯量制御の操作量は、合流部10側に流れる湯の流路の開口量比を前記混合比に一致させる操作量の値で与えられており、混合比の変化に対して湯の混合比が小さくなるにつれて湯の流量を小さくする方向に直線的に変化させる操作量で与えられている。つまり、図2(a)の横軸に示されている湯と水の混合比のうち、湯の混合比が小さくなるにつれて(図の右側に向かうにつれて)、湯側であるタンク湯水混合器12のステッピングモータ51のステップ数を混合比に比例させて小さくするような値が与えられている。   As shown by the characteristic line a in FIG. 2A, the operation amount of the hot water amount control at each mixing ratio in the control data matches the opening ratio of the hot water flow path flowing to the merging portion 10 side with the mixing ratio. It is given by the value of the manipulated value, and is given by the manipulated value that linearly changes in the direction of decreasing the flow rate of hot water as the mixing ratio of hot water becomes smaller with respect to the change in the mixing ratio. That is, among the mixing ratios of hot water and water shown on the horizontal axis of FIG. 2A, as the mixing ratio of hot water becomes smaller (toward the right side in the figure), the tank hot water / water mixer 12 on the hot water side. A value is set such that the number of steps of the stepping motor 51 is reduced in proportion to the mixing ratio.

一方、図2(a)の特性線bに示されるように、制御データの各混合比における水量制御の操作量は、合流部10側に流れる水の流路の開口量比を前記混合比に一致させる操作量を、合流部10に導入される湯の流量が湯の流路の水圧変化に起因して前記混合比に相当する流量よりも小さくなる分を補うように水流量を増加させる方向に補正した値で与えられている。   On the other hand, as shown by the characteristic line b in FIG. 2A, the operation amount of the water amount control at each mixing ratio of the control data is the opening ratio of the flow path of the water flowing to the merging portion 10 side to the mixing ratio. The direction in which the water flow rate is increased so as to compensate for the operation amount to be matched to compensate for the flow rate of the hot water introduced into the merging portion 10 being smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure of the hot water flow path. Is given as a corrected value.

具体的には、制御データの各混合比における水量制御の操作量は、混合比の変化に対して水の混合比が大きくなるにつれて水の流量を大きくする方向に変化するが、その変化量が混合比の変化に対して一定でない値により与えられている。   Specifically, the operation amount of the water amount control at each mixing ratio of the control data changes in the direction of increasing the flow rate of the water as the water mixing ratio increases with respect to the change in the mixing ratio. It is given by a non-constant value for the change of the mixing ratio.

つまり、図の右側に向かうにつれて湯と水の混合比のうち水の混合比は大きくなるが、水混合器14のステッピングモータ53のステップ数は混合比に比例させて大きくするのではなく、合流部10に導入される湯の流量が合流部10に導入される湯と水の流量比を前記混合比に一致させたときの湯の流量に対して水圧変化(湯の水圧変化)に起因して小さくなる不足分(図16(a)の特性線a、図17(b)の特性線aに示したように、給湯流量が小または中で、かつ、湯の混合比が小さくてタンク湯水混合器12を通る湯の量が小さいときに湯の流量が小さくなってしまう分)を補う方向に、水量制御の操作量(ステッピングモータ53のステップ数)の変化割合を曲線的に変化させる値で与えられている。   In other words, the water mixing ratio of the mixing ratio of hot water and water increases toward the right side of the figure, but the number of steps of the stepping motor 53 of the water mixer 14 does not increase in proportion to the mixing ratio. The flow rate of hot water introduced into the unit 10 is caused by a change in water pressure (change in the water pressure of hot water) with respect to the flow rate of hot water when the flow rate ratio of hot water and water introduced into the merge unit 10 is matched with the mixing ratio. The amount of shortage that becomes smaller (as indicated by the characteristic line a in FIG. 16A and the characteristic line a in FIG. 17B), the hot water flow rate is small or medium, and the hot water mixing ratio is small, so A value that changes the rate of change of the operation amount of the water amount control (the number of steps of the stepping motor 53) in a curve in a direction that compensates for the amount of hot water that flows when the amount of hot water passing through the mixer 12 is small. Is given in.

言い換えれば、図2(a)の特性線bは、破線で示す特性線b”に示されるような混合比に比例する操作量となる直線の近傍に形成されて、混合設定温度の低い領域においては操作量の変化割合を小さくし、混合設定温度の高い領域においては操作量の変化割合を大きくする曲線であり、かつ、図2(a)の特性線b上の水の流量比が特性線b”上の水の流量比以上となるように、水の混合比に対応する水量制御の操作量を混合比に比例する操作量よりも多めに設定する制御データである。   In other words, the characteristic line b in FIG. 2A is formed in the vicinity of a straight line having an operation amount proportional to the mixing ratio as indicated by the characteristic line b ″ indicated by the broken line, and in a region where the mixing set temperature is low. Is a curve that decreases the change rate of the manipulated variable and increases the change rate of the manipulated variable in the region where the mixing set temperature is high, and the water flow rate ratio on the characteristic line b in FIG. This is control data for setting the operation amount of the water amount control corresponding to the water mixing ratio to be greater than the operation amount proportional to the mixing ratio so as to be equal to or higher than the flow rate ratio of water on b ″.

一般に、合流部10で合流する湯の流量と水の流量は、ミキシング流量制御手段の操作量により定まるタンク湯水混合器12の弁52の開弁量(流路開口量)と水混合器14の弁54の開弁量(流路開口量)とにより定まるが、水圧変化(流路抵抗)によって、同じ流路開口量でも流量が異なるものとなってしまい、本実施例のような熱源装置においては、前記の如く、給湯流量が少なく、かつ、湯の混合比が小さいと、出湯通路9の水圧が小さくなり、流量が小さくなってしまうので、その水圧変化に起因して湯の流量が小さくなる分を修正する方向に、水量操作量を大きめに設定している。   In general, the flow rate of hot water and the flow rate of water to be merged at the merge unit 10 are determined by the valve 52 opening amount (flow channel opening amount) of the tank hot water / water mixer 12 determined by the operation amount of the mixing flow rate control means and the water mixer 14. Although it is determined by the valve opening amount (flow passage opening amount) of the valve 54, the flow rate varies even with the same flow passage opening amount due to a change in water pressure (flow passage resistance). As mentioned above, if the hot water supply flow rate is small and the mixing ratio of hot water is small, the water pressure in the hot water outlet passage 9 becomes small and the flow rate becomes small. The amount of water operation is set to be larger in the direction to correct.

つまり、本実施例では、合流部10側に流れる湯の流路の開口量比を前記混合比に一致させる操作量の値で制御データの各混合比における湯量制御の操作量を与えたときに、合流部10に導入される湯の流量が前記湯の流路の水圧変化に起因して前記混合比に相当する流量よりも小さくなる分を補うように、制御データの各混合比における水量制御の操作量が、合流部10側に流れる水の流路の開口量比を前記混合比に一致させる操作量よりも水流量を増加させる方向に補正した値で与えられている。   That is, in this embodiment, when the operation amount of hot water amount control at each mixing ratio of the control data is given by the value of the operation amount that matches the opening amount ratio of the flow path of the hot water flowing to the merging portion 10 side with the mixing ratio. The water amount control at each mixing ratio of the control data is made up to compensate for the flow rate of the hot water introduced into the merging portion 10 being smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure in the hot water flow path. The operation amount is given as a value corrected in the direction of increasing the water flow rate rather than the operation amount for matching the opening ratio of the flow path of the water flowing to the merging portion 10 side with the mixing ratio.

なお、このような水量制御の操作量の制御データを形成する際、例えば予めタンク湯水混合器12の操作量(ステッピングモータ51のステップ数)と湯の流量との関係データを様々な給湯流量、給水温度、貯湯槽出湯水温度に対して求め、その求めた結果を参考にし、かつ、水量制御を多めにすることによって混合湯水温が低めになっても、その分を、ミキシング流量制御手段35によるミキシング流量フィードバック制御や給湯器16の追い加熱によるフィードバック制御によって補償できるように、前記水量制御の操作量の変化量を定めて水量制御の操作量の制御データを形成している。   In addition, when forming the control data of the operation amount of the water amount control, for example, relation data between the operation amount of the tank hot water / water mixer 12 (the number of steps of the stepping motor 51) and the flow rate of the hot water are set as various hot water supply flow rates, Even if the mixed hot water temperature is lowered by referring to the obtained results and by increasing the water amount control, the amount is mixed with the mixing flow rate control means 35. The amount of change in the operation amount of the water amount control is determined to form control data for the operation amount of the water amount control so that the compensation can be performed by the mixing flow rate feedback control by the above and the feedback control by the additional heating of the water heater 16.

ミキシング流量制御手段35は、図2(a)の特性線a、bに示される制御データに基づいて混合湯水の設定温度に対応する混合比から湯量制御と水量制御の操作量をそれぞれ求める。例えば混合設定温度に対する湯と水の混合比Msに対して湯量制御の操作量であるステッピングモータ51のステップ数の一つの値Saと水量制御の操作量であるステッピングモータ53のステップ数の一つの値Sbとを組み合わせて決定する。そして、その求めた(決定した)操作量でタンク湯水混合器12と水混合器14を制御する(ステッピングモータ51,53のステップ数を制御する)ことにより前記設定温度の混合湯水を作り出す。   The mixing flow rate control means 35 obtains the operation amounts of the hot water amount control and the water amount control from the mixing ratio corresponding to the set temperature of the mixed hot water based on the control data indicated by the characteristic lines a and b in FIG. For example, one value Sa of the step number of the stepping motor 51, which is the operation amount of the hot water amount control, and one of the number of steps of the stepping motor 53, which is the operation amount of the water amount control, with respect to the mixing ratio Ms of hot water and water with respect to the mixing set temperature. It is determined in combination with the value Sb. Then, by controlling the tank hot water mixer 12 and the water mixer 14 with the determined (determined) operation amount (controlling the number of steps of the stepping motors 51 and 53), the mixed hot water of the set temperature is created.

以上のように、本実施例は、制御データの各混合比における湯量制御の操作量(ステッピングモータ51のステップ数)は、特性線aに示されるように、混合比の変化に対して湯の混合比が小さくなるにつれて湯の流量を小さくする方向に直線的に変化させる操作量で与えられているために、給湯流量(湯と水を合わせた総流量)が小さく、かつ、湯の混合比が小さいと、図2(c)に示すように、合流部に導入される湯の流量が水圧変化に起因して合流部に導入される湯と水の混合比に比べて極端に小さくなってしまうことがあるが、その湯流量の不足分を水流量で補う方向に水量制御の操作量が操作されて水の流量が増える分、図2(d)の特性線Qに示されるように、ミキシング流量制御手段35により形成される混合湯水の流量は、混合湯水の設定温度範囲における変動量が許容範囲内の変動量となるように制御される。なお、湯の経路に減圧弁50もパイロット方式の電磁弁も設けない場合の総流量は、図2(d)の特性線Q’に示すようになる。 As described above, in this embodiment, the operation amount of the hot water amount control (the number of steps of the stepping motor 51) at each mixing ratio of the control data is such that the hot water flow rate changes with respect to the change in the mixing ratio as indicated by the characteristic line a. As the mixing ratio decreases, the hot water flow rate (total flow rate of hot water and water) is small and the mixing ratio of hot water because it is given as an operation amount that linearly changes the flow rate of hot water as the mixing ratio decreases. 2 is small, the flow rate of hot water introduced into the merging portion becomes extremely smaller than the mixing ratio of hot water and water introduced into the merging portion due to the change in water pressure, as shown in FIG. Although sometimes put away, the operation amount of the direction water control supplemented with water flow rate for the shortage of water flow is operated amount that the flow rate of water is increased, as shown by the characteristic line Q 3 shown in FIG. 2 (d) The flow rate of the mixed hot water formed by the mixing flow rate control means 35 is The variation amount in the set temperature range of the mixed hot water is controlled to be a variation amount within an allowable range. The total flow rate when the pressure reducing valve 50 and the pilot type solenoid valve are not provided in the hot water path is as shown by the characteristic line Q 3 ′ in FIG.

また、図2(b)に示すように給湯流量が多いときには、湯の流量が湯量制御の操作量に対応した値となることから、混合比に対する湯の流量が図2(b)の特性線a1に示すようになり、混合比に対する水の流量が図2(b)の特性線b1に示すようになる。そのため、図2(d)の特性線Qに示されるように、水量制御の操作量を増やした分だけ給湯流量がやや多めになるが、その給湯流量の変動量は許容範囲内であり、また、もともと利用者が多めの給湯流量で給湯するときに多少多めの湯が給湯されても、小さめの給湯流量で給湯するときに給湯したい流量よりも実際の給湯流量が極端に少ない時のようには不快に感じにくい。 Further, as shown in FIG. 2B, when the hot water supply flow rate is large, the hot water flow rate becomes a value corresponding to the manipulated variable of the hot water amount control, so that the hot water flow rate with respect to the mixing ratio is the characteristic line of FIG. As shown in a1, the flow rate of water with respect to the mixing ratio becomes as shown by the characteristic line b1 in FIG. Therefore, as shown by the characteristic line to Q 1 FIG. 2 (d), the but hot water flow amount that increased the amount of operation of the water control is somewhat larger amount, the variation amount of the hot water flow rate is within the allowable range, Also, even when the user originally supplied hot water at a larger hot water flow rate, even if a little hot water was supplied, the actual hot water flow rate was extremely less than the flow rate at which the user wanted to supply hot water at a smaller hot water flow rate. It is hard to feel uncomfortable.

また、図2(b)に示すように給湯流量が中程度のときには、混合比に対する湯の流量が図2(b)の特性線a2に示すようになり、混合比に対する水の流量が図2(b)の特性線b2に示すようになる。そのため、図2(d)の特性線Qに示されるように、給湯流量はやや少なめになる領域があるなるが、その給湯流量の変動量は許容範囲内であり、給湯流量が小さいときよりも変動量は小さい。なお、湯の経路に減圧弁50もパイロット方式の電磁弁も設けない場合に、給湯流量が中程度であると、湯の流量は、図2(b)の特性線 に示すようになり、総流量は、図2(d)の特性線Q’に示すようになる。 As shown in FIG. 2B, when the hot water supply flow rate is medium, the hot water flow rate with respect to the mixing ratio is as shown by the characteristic line a2 in FIG. 2B, and the water flow rate with respect to the mixing ratio is as shown in FIG. As shown in the characteristic line b2 of (b). Therefore, as shown by the characteristic line Q 2 in FIG. 2 (d), but hot water flow will have a region to be somewhat fewer, the variation amount of the hot water flow rate is within the allowable range, than when the hot water flow rate is small However, the fluctuation amount is small. In the case where neither the pressure reducing valve 50 nor the pilot type solenoid valve is provided in the hot water path, if the hot water supply flow rate is medium, the hot water flow rate is as shown by the characteristic line a 2 in FIG. Thus, the total flow rate is as shown by the characteristic line Q 2 ′ in FIG.

ミキシング流量制御手段35は、以上のような制御データに基づくミキシング流量のフィードフォワード的な制御によって混合湯水を形成し、かつ、形成される混合湯水の温度を混合サーミスタ28によって検出し、その検出温度と混合設定温度とのずれ量を補正する方向に混合比の設定を変更する。例えば混合サーミスタ28の検出温度が混合設定温度よりいときには、図2(a)の矢印に示されるように、混合比を左側に微調整し、その逆に、混合サーミスタ28の検出温度が混合設定温度よりいときには混合比を図2(a)の右側に微調整する。そして、変更した混合比に対応する湯量制御の操作量(ステッピングモータ51のステップ数)と水量制御の操作量(ステッピングモータ53のステップ数)に操作するミキシング流量フィードバック制御を行うことにより、より正確に、混合設定温度の混合湯水を形成できる。 The mixing flow rate control means 35 forms mixed hot water by feedforward control of the mixing flow rate based on the control data as described above, and detects the temperature of the formed mixed hot water with the mixing thermistor 28 and detects the detected temperature. And the mixing ratio setting are changed in a direction to correct the deviation amount between the mixing temperature and the mixing set temperature. For example the detected temperature is lower Itoki a mixed set temperature of the mixed thermistor 28, as indicated by an arrow in FIG. 2 (a), the mixing ratio is finely adjusted to the left, and vice versa, the detected temperature of the mixed thermistor 28 is mixed than the set temperature is high Itoki fine adjustment of the mixing ratio on the right side of FIG. 2 (a). Then, by performing mixing flow rate feedback control that operates on the operation amount of the hot water control (the number of steps of the stepping motor 51) and the operation amount of the water flow control (the number of steps of the stepping motor 53) corresponding to the changed mixing ratio, it becomes more accurate. In addition, it is possible to form a mixed hot and cold water having a set temperature.

また、給湯器16の燃焼制御手段47は、混合サーミスタ28の検出温度を検出し、この検出温度が給湯設定温度よりも低いときには給湯熱交換器17による追い加熱動作を行えるようにする。なお、本実施例において、合流部10と給湯器16の湯水導入部側を接続する湯水導入通路15の長さについて限定されるものではないが、例えば4mといった長い長さの湯水導入通路であることも想定しており、その場合、合流部10で形成された混合湯水が給湯器16に到達するまでに例えば20〜30秒といった時間がかかるので、燃焼制御手段47によって、この時間差を考慮した追い加熱動作が行われる。   Moreover, the combustion control means 47 of the hot water heater 16 detects the temperature detected by the mixed thermistor 28, and enables the follow-up heating operation by the hot water heat exchanger 17 when the detected temperature is lower than the set hot water temperature. In the present embodiment, the length of the hot water introduction passage 15 connecting the joining portion 10 and the hot water introduction portion side of the water heater 16 is not limited, but it is a hot water introduction passage having a long length of 4 m, for example. In that case, since it takes time such as 20 to 30 seconds for the mixed hot water formed in the merging portion 10 to reach the water heater 16, the combustion control means 47 takes this time difference into account. A follow-up heating operation is performed.

次に、第2実施例について説明する。なお、第2実施例の説明において前記第1実施例と同様の構成については省略または簡略化する。第2実施例は前記第1実施例とほぼ同様に構成されており、第2実施例が前記第1実施例とことなる特徴的なことは、図7(a)に示されるような制御データを与えたことである。   Next, a second embodiment will be described. In the description of the second embodiment, the same configuration as that of the first embodiment is omitted or simplified. The second embodiment is configured in substantially the same manner as the first embodiment, and the second embodiment differs from the first embodiment in that the control data as shown in FIG. Is given.

つまり、前記第1実施例では、合流部10側に流れる湯の流路の開口量比を前記混合比に一致させる操作量の値で制御データの各混合比における湯量制御の操作量を与えたときに、合流部10に導入される湯の流量が前記湯の流路の水圧変化に起因して前記混合比に相当する流量よりも小さくなる分を補うように水量制御の操作量を増やすような制御データを与えたが、第2実施例では、制御データの各混合比における湯量制御の操作量を、合流部10側に流れる湯の流路の開口量比を前記混合比に一致させる操作量よりも湯流量を増加させる方向に補正した値で与えている。   That is, in the first embodiment, the operation amount of hot water amount control at each mixing ratio of the control data is given by the value of the operation amount that matches the opening amount ratio of the flow path of the hot water flowing to the merging portion 10 side with the mixing ratio. Sometimes, the operation amount of the water amount control is increased so as to compensate for the flow rate of the hot water introduced into the merging portion 10 being smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure in the flow path of the hot water. However, in the second embodiment, the operation amount of the hot water amount control at each mixing ratio of the control data is set so that the opening ratio of the flow path of the hot water flowing to the merging portion 10 side matches the mixing ratio. It is given as a value corrected in the direction of increasing the hot water flow rate rather than the amount.

つまり、第2実施例は、例えば図7(a)の特性線aに示されるように、前記湯の流路の水圧変化に起因して湯の流量が混合比に相当する流量よりも小さくなる分を補う方向に、湯量制御の操作量の変化割合を曲線的に変化させる値で与えられる。   That is, in the second embodiment, for example, as indicated by the characteristic line a in FIG. 7A, the flow rate of hot water is smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure in the flow path of the hot water. It is given as a value that changes the change rate of the operation amount of the hot water control in a curve in a direction to compensate for the minute.

なお、この例では、図7(a)の横軸に示されている湯と水の混合比のうち、湯の混合比が小さくなるにつれて(図の右側に向かうにつれて)、湯側であるタンク湯水混合器12のステッピングモータ51のステップ数を小さくするような値が与えられており、合流部10側に流れる湯の流路の開口量比を前記混合比に一致させる操作量(ステップ数)で与えたときに合流部10に導入される湯の流量が湯の流路の水圧変化に起因して前記混合比に相当する流量よりも小さくなる分を補う方向に湯流量を増加させる方向に補正した値としている。   In this example, of the mixing ratio of hot water and water shown on the horizontal axis of FIG. 7 (a), as the mixing ratio of hot water becomes smaller (toward the right side in the figure), the tank on the hot water side A value that reduces the number of steps of the stepping motor 51 of the hot water mixer 12 is given, and an operation amount (the number of steps) for matching the opening ratio of the flow path of the hot water flowing to the junction 10 side with the mixing ratio. In the direction of increasing the hot water flow rate in a direction that compensates for the flow rate of hot water introduced into the merging section 10 when it is given by This is a corrected value.

つまり、図の右側に向かうにつれて湯と水の混合比のうち湯の混合比は小さくなるが、タンク湯水混合器12のステッピングモータ51のステップ数は混合比に比例させて小さくするのではなく、合流部10に導入される湯の流量が合流部10に導入される湯と水の流量比を前記混合比に一致させたときの湯の流量に対して水圧変化(湯の水圧変化)に起因して小さくなる不足分(図16(a)の特性線aに示したように、給湯流量が小さく、かつ、湯の混合比が小さくてタンク湯水混合器12を通る湯の量が小さいときに湯の流量が小さくなってしまう分)を補う方向に、湯量制御の操作量(ステッピングモータ51のステップ数)の変化割合を曲線的に変化させる値で与えられている。   That is, the hot water mixing ratio of the mixing ratio of hot water and water decreases toward the right side of the figure, but the number of steps of the stepping motor 51 of the tank hot water mixer 12 is not reduced in proportion to the mixing ratio. Due to the change in the water pressure (the change in the water pressure of the hot water) with respect to the flow rate of the hot water when the flow rate of the hot water introduced into the merge unit 10 matches the flow ratio of the hot water introduced into the merge unit 10 with the mixing ratio. The amount of hot water passing through the tank hot water mixer 12 is small when the hot water flow rate is small and the hot water mixing ratio is small, as shown by the characteristic line a in FIG. The amount of change in the amount of hot water control (the number of steps of the stepping motor 51) is given as a value that changes in a curve in a direction that compensates for the amount of decrease in the flow rate of hot water.

言い換えれば、図7(a)の特性線aは、破線で示す特性線a”に示されるような混合比に比例する操作量となる直線の近傍に形成されて、混合設定温度の低い領域においては操作量の変化割合を大きくし、混合設定温度の高い領域においては操作量の変化割合を小さくする曲線であり、湯の混合比に対応する湯量制御の操作量を混合比に比例する操作量よりも多めに設定する制御データである。 In other words, the characteristic line a in FIG. 7A is formed in the vicinity of a straight line having an operation amount proportional to the mixing ratio as indicated by the characteristic line a ″ indicated by the broken line, and in a region where the mixing set temperature is low. size comb rate of change of the operation amount, the higher the mixing temperature setting area is small Kusuru curve change rate of the operation amount, the operation which is proportional to the amount of operation of the hot water control corresponding to the mixing ratio of hot water to the mixing ratio The control data is set to be larger than the amount.

一方、図7(a)の特性線bに示されるように、制御データの各混合比における水量制御の操作量は、水側である水混合器14のステッピングモータ53のステップ数を混合比に比例させて小さくするような値が与えられる。   On the other hand, as shown by the characteristic line b in FIG. 7A, the operation amount of the water amount control at each mixing ratio of the control data is determined by changing the number of steps of the stepping motor 53 of the water mixer 14 on the water side to the mixing ratio. A value that decreases proportionally is given.

このような制御データを与えた場合、図8に示されるように、給湯流量が小さいときの、混合比に対する湯の流量比(特性線a)が、湯の操作量を図7(a)の特性線aに示したように増やすことにより、混合比と操作量とが比例する制御データにより与えた場合の流量比(図16(b)の特性線a)のような流量比の落ち込みを抑制できる。なお、図8の破線特性線sは図7(a)の特性線aと同じ特性線を示しており、この特性線sは混合比に対する操作量を示している。また、図8の特性線bは水の流量比を示しており、図8の特性線a、bに示されている流量比は、流量が最大となる時の流量比(図のR)を基準として求めている。そして、図7(c)の特性線 に示されるように、湯の混合比が小さい領域においても湯の流量が大きく減少することを防げるため、図7(d)の特性線Qに示されるように、湯と水の総流量である給湯流量を安定化できる。なお、湯の経路に減圧弁50もパイロット方式の電磁弁も設けない場合の総流量は、図7(d)の特性線Q’に示すようになる。 When such control data is given, as shown in FIG. 8, when the hot water supply flow rate is small, the flow rate ratio of hot water to the mixing ratio (characteristic line a) indicates the operation amount of hot water as shown in FIG. By increasing as shown by the characteristic line a, a drop in the flow rate ratio such as the flow rate ratio (characteristic line a in FIG. 16B) given by control data in which the mixing ratio and the operation amount are proportional is suppressed. it can. The broken line characteristic line s in FIG. 8 indicates the same characteristic line as the characteristic line a in FIG. 7A, and this characteristic line s indicates the operation amount with respect to the mixing ratio. Moreover, the characteristic line b in FIG. 8 shows the flow rate ratio of water, and the flow rate ratio shown in the characteristic lines a and b in FIG. 8 is the flow rate ratio (R in the figure) when the flow rate becomes maximum. We are seeking as a standard. Then, as shown by the characteristic line a 3 in FIG. 7C, in order to prevent the hot water flow rate from greatly decreasing even in the region where the mixing ratio of hot water is small, the characteristic line Q 3 in FIG. As shown, the hot water supply flow rate, which is the total flow rate of hot water and water, can be stabilized. The total flow rate in the case where neither the pressure reducing valve 50 nor the pilot type solenoid valve is provided in the hot water path is as shown by the characteristic line Q 3 ′ in FIG.

なお、図7(b)に示すように給湯流量が多いときには、湯の流量が湯量制御の操作量に対応した値となることから、混合比に対する湯の流量が図7(b)の特性線a1に示すようになり、混合比に対する水の流量が図7(b)の特性線b1に示すようになる。そのため、図7(d)の特性線Qに示されるように、水量制御の操作量を増やした分だけ給湯流量がやや多めになるが、その給湯流量の変動量は許容範囲内であり、また、もともと利用者が多めの給湯流量で給湯するときに多少多めの湯が給湯されても、小さめの給湯流量で給湯するときに給湯したい流量よりも実際の給湯流量が極端に少ない時のようには不快に感じにくい。 As shown in FIG. 7B, when the hot water supply flow rate is large, the hot water flow rate becomes a value corresponding to the manipulated variable of the hot water amount control, so that the hot water flow rate with respect to the mixing ratio is the characteristic line of FIG. As shown in a1, the flow rate of water with respect to the mixing ratio becomes as shown by the characteristic line b1 in FIG. Therefore, as shown by the characteristic line to Q 1 FIG. 7 (d), the but hot water flow amount that increased the amount of operation of the water control is somewhat larger amount, the variation amount of the hot water flow rate is within the allowable range, Also, even when the user originally supplied hot water at a larger hot water flow rate, even if a little hot water was supplied, the actual hot water flow rate was extremely less than the flow rate at which the user wanted to supply hot water at a smaller hot water flow rate. It is hard to feel uncomfortable.

また、図7(b)に示すように給湯流量が中程度のときには、混合比に対する湯の流量が図7(b)の特性線a2に示すようになり、混合比に対する水の流量が図7(b)の特性線b2に示すようになる。そのため、図7(d)の特性線Qに示されるように、給湯流量はやや少なめになる領域があるなるが、その給湯流量の変動量は許容範囲内であり、給湯流量が小さいときよりも変動量は小さいなお、湯の経路に減圧弁50もパイロット方式の電磁弁も設けない場合に、給湯流量が中程度であると、湯の流量は、図7(b)の特性線a’に示すようになり、総流量は、図7(d)の特性線Q’に示すようになる。 Further, as shown in FIG. 7B, when the hot water supply flow rate is medium, the flow rate of hot water with respect to the mixing ratio is as shown by the characteristic line a2 in FIG. 7B, and the flow rate of water with respect to the mixing ratio is as shown in FIG. As shown in the characteristic line b2 of (b). Therefore, as shown by the characteristic line Q 2 in FIG. 7 (d), but hot water flow will have a region to be somewhat fewer, the variation amount of the hot water flow rate is within the allowable range, than when the hot water flow rate is small In the case where neither the pressure reducing valve 50 nor the pilot type solenoid valve is provided in the hot water path, if the hot water flow rate is medium, the hot water flow rate is the characteristic line a ′ in FIG. The total flow rate is as shown by the characteristic line Q 2 ′ in FIG.

なお、第2実施例は、説明を簡略化するために湯の流量を増加させることについて述べたが、図9に、制御データの各混合比における湯量制御の操作量を、合流部10側に流れる湯の流路の開口量比を前記混合比に一致させる操作量よりも湯流量を増加させる方向に補正した値で与え(特性線a、参照)、かつ、合流部10側に流れる水の流路の開口量比を前記混合比に一致させる操作量を、合流部10に導入される湯の流量が湯の流路の水圧変化に起因して前記混合比に相当する流量よりも小さくなる分を補うように水流量を増加させる方向に補正した値で与える(特性線b、参照)制御データの例が、補正前の制御データ(特性線a’、b’)と共に示されている。   In addition, although 2nd Example described increasing the flow volume of hot water in order to simplify description, the operation amount of the hot water amount control in each mixing ratio of control data is shown in FIG. The opening ratio of the flow path of flowing hot water is given as a value corrected in the direction of increasing the flow rate of hot water rather than the manipulated variable that matches the mixing ratio (see characteristic line a), and the water flowing to the junction 10 side The operation amount for making the opening ratio of the flow path coincide with the mixing ratio is such that the flow rate of hot water introduced into the merging portion 10 is smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure of the flow path of hot water. An example of control data given by a value corrected in the direction of increasing the water flow rate to compensate for the minute (see characteristic line b) is shown together with control data before correction (characteristic lines a ′ and b ′).

特性線aは、表2に示されている、合流部で混合する湯と水の混合割合である複数の混合比レベル(表の縦軸の数値1〜21)に対するタンク湯水混合器12のステッピングモータ51のパルス数を示したものであり、表2における各混合比レベルの湯側パルス数を示す。また、同様に、特性線bは、各混合比レベルに対する水混合器14のステッピングモータ53のパルス数を示したものであり、表2における各混合比レベルの水側パルス数を示す。一方、特性線a’は、前記した表1の縦軸の数値1〜21に対するタンク湯水混合器12のステッピングモータ51のパルス数(湯側パルス数)を示し、特性線b’は、各混合比レベルに対する水混合器14のステッピングモータ53のパルス数(水側パルス数)を示す。   The characteristic line a indicates the stepping of the tank hot water mixer 12 with respect to a plurality of mixing ratio levels (numerical values 1 to 21 on the vertical axis of the table) shown in Table 2 which are mixing ratios of hot water and water mixed in the junction. The number of pulses of the motor 51 is shown, and the number of hot-water pulses at each mixing ratio level in Table 2 is shown. Similarly, the characteristic line b indicates the number of pulses of the stepping motor 53 of the water mixer 14 for each mixing ratio level, and indicates the number of water-side pulses at each mixing ratio level in Table 2. On the other hand, the characteristic line a ′ shows the number of pulses (number of hot water side pulses) of the stepping motor 51 of the tank hot water mixer 12 with respect to the numerical values 1 to 21 on the vertical axis of Table 1 above, and the characteristic line b ′ shows each mixing. The number of pulses of the stepping motor 53 of the water mixer 14 with respect to the ratio level (number of water side pulses) is shown.

Figure 0006138550
Figure 0006138550

また、表2および図9の特性線a、bに示される制御データに基づいて制御を行ったときの、各混合比レベルに対しての給湯流量毎(給湯流量レベルQdis LLV1〜Qdis LV6)の湯と水の実際の混合流量割合との関係データの例が、表3および図10に示されている。 Moreover, the characteristic line a in Table 2 and FIG. 9, when performing control based on the control data shown in b, each hot water flow rate for each mixing ratio level (hot water flow level Qdis LLV1 ~Qdis LV6) Examples of relational data between the hot water and the actual mixing flow rate are shown in Table 3 and FIG.

Figure 0006138550
Figure 0006138550

なお、表3において、給湯流量レベルQdis LLV1〜Qdis LV6は、表の右側に向かうにつれて給湯流量が大きくなり、1分ごとの流量が、Qdis LLV1=3リットル、Qdis LLV2=5リットル、Qdis LLV3=8リットル、Qdis LLV4=12リットル、Qdis LLV5=20リットル、Qdis LLV6=30リットルの場合をそれぞれ示している。つまり、例えばQdis LLV1の列は、給湯流量(湯と水を合わせた給湯の総流量)が3リットル/分の場合の各混合比レベルに対する実際の湯の流量割合が示されている。また、図10の特性線aは表3における給湯流量がQdis LLV1の特性を示し、特性線bは給湯流量がQdis LLV2の特性を示すといった如く、特性線c、d、e、fは、順に、給湯流量がQdis LLV3、Qdis LLV4、Qdis LLV5、Qdis LLV6の特性を示す。 In Table 3, the hot water flow rate levels Qdis LLV1 ~Qdis LV6 is hot water flow rate is increased toward the right side of the table, the flow rate per minute, Qdis LLV1 = 3 liters, Qdis LLV2 = 5 liters, Qdis LLV3 = 8 liters, Qdis LLV4 = 12 liters, Qdis LLV5 = 20 liters, and Qdis LLV6 = 30 liters are shown. That is, for example, the column of Qdis LLV1 shows the actual hot water flow rate ratio with respect to each mixing ratio level when the hot water flow rate (total flow rate of hot water including hot water and water) is 3 liters / minute. Further, the characteristic lines a in FIG. 10 indicate the characteristics of the hot water flow rate of Qdis LLV1 in Table 3, the characteristic lines b indicate the characteristics of the hot water supply flow rate of Qdis LLV2 , and the characteristic lines c, d, e, and f are in order. The hot water flow rate shows the characteristics of Qdis LLV3 , Qdis LLV4 , Qdis LLV5 , and Qdis LLV6 .

また、Qdis LLV1、Qdis LLV2、Qdis LLV3の実際の湯の流量割合が図11(a)、(b)、(c)の特性線aにそれぞれ示され、Qdis LLV4、Qdis LLV5、Qdis LLV6の実際の湯の流量割合が図12(a)、(b)、(c)の特性線aにそれぞれ示されており、これらの各図の特性線bには、実際の水の流量割合が示されている。 Further, Qdis LLV1, Qdis LLV2, flow rate of the actual hot water Qdis LLV3 is FIG. 11 (a), the respectively indicated by the characteristic line a in (b), (c), the actual Qdis LLV4, Qdis LLV5, Qdis LLV6 12 (a), 12 (b), and 12 (c), the characteristic line a shows the actual water flow rate. ing.

これらの図および表から分かるように、給湯流量に応じて給湯流量が小さいほど水圧変化の影響を受けやすいものであり、表3に示した給湯流量レベルQdis LLV6=30リットル/分、Qdis
LLV5=20リットル/分とでは、その影響を受けないが、Qdis LLV4=12リットル/分、Qdis
LLV3=8リットル/分では影響が出始め、Qdis LLV2=5リットル/分、Qdis LLV1=3リットル/分では影響が顕著になる。
As can be seen from these figures and tables, the smaller the hot water flow rate is, the more susceptible to changes in the water pressure, and the hot water flow rate level shown in Table 3 is Qdis LLV6 = 30 liters / minute, Qdis.
LLV5 = 20 liters / minute is not affected, but Qdis LLV4 = 12 liters / minute, Qdis
The effect starts to appear at LLV3 = 8 liters / minute, and the effect becomes remarkable at Qdis LLV2 = 5 liters / minute and Qdis LLV1 = 3 liters / minute.

ところで、以上の説明のように、貯湯槽2とパイロット方式のタンク側電磁弁13とを備えて、これらを経由して湯が出湯される場合において、前記各実施例のような制御によって、(1)総水量が多いときには貯湯槽2を経由して合流部10に流れる湯と貯湯槽2を経由しないで給水通路8bから合流部10に流れる水との水量差が少ない(または殆ど無い)が、総水量が少ないときには貯湯槽2を経由して合流部10に流れる湯が出なくなる点と、(2)総水量が多いときにはパイロット方式のタンク側電磁弁13を経由して合流部10に流れる湯とパイロット方式の電磁弁を経由しないで給水通路8bから合流部10に流れる水との水量差が少ない(または殆ど無い)が、総水量が少ないとパイロット方式の電磁弁を経由する湯が出なくなる点、の両方を改善することができるが、それでもなお、総水量(給湯流量)が少なくなるにつれ、前記(1)、(2)の影響が残る(図10、図11、図12、参照)。 By the way, as described above, in the case where the hot water storage tank 2 and the pilot-type tank-side electromagnetic valve 13 are provided and hot water is discharged via these, 1) When the total amount of water is large, there is little (or almost no) difference in the amount of water between the hot water flowing through the hot water tank 2 and flowing into the merging section 10 and the water flowing from the water supply passage 8b into the merging section 10 without passing through the hot water tank 2. , the total amount of water less Itoki a point no longer out hot water flowing to the confluence portion 10 by way of the hot water storage tank 2, the joining portion 10 through the tank-side electromagnetic valve 13 of the pilot type when (2) is larger total water There is little (or almost no) difference in the amount of water between the flowing hot water and the water flowing from the water supply passage 8b to the merging section 10 without passing through the pilot-type solenoid valve, but when the total amount of water is small, the hot water passing through the pilot-type solenoid valve No However, as the total water volume (hot water flow rate) decreases, the effects of (1) and (2) remain (see FIGS. 10, 11, and 12). ).

そこで、以下のようにすることにより、給湯流量の変化に応じた適切な対応がとれるようにしている。例えば、入浴中に、蛇口を開けて洗面器に湯を入れながら体を洗い(このときの給湯流量レベルはLLV1(3L/min))、洗面器の湯を使用しながらシャンプーを使用して洗髪し、その後、蛇口からシャワーに切り替えてシャンプーを洗い流す時には、給湯流量を増やすことから、表3に示した給湯流量レベルを参照すると、そのレベルは、例えば給湯流量レベルLLV1(3L/min)から給湯流量レベルLLV4(12L/min)のように変化させて使用する場合がある。 In view of this, the following measures are taken to appropriately respond to changes in the hot water supply flow rate. For example, while taking a bath, wash the body while opening the faucet and pouring hot water into the basin (at this time the hot water supply flow level is L LV1 (3 L / min)), and using shampoo while using the basin hot water When washing the hair and then switching from the faucet to the shower to wash away the shampoo, the hot water supply flow rate is increased. Therefore, referring to the hot water supply flow level shown in Table 3, the level is, for example, the hot water supply flow level L LV1 (3 L / min) The hot water supply flow level L LV4 (12 L / min) may be used.

前記のように貯湯槽2とパイロット方式の電磁弁(タンク側電磁弁13)側を経由する湯は、総水量が少ないと湯が出なくなるので、シャワーに切り替える前の給湯流量レベルLLV1(3L/min)のときには、ミキシング流量制御手段35により制御される混合比レベルQLvを、思いっきり湯が出やすいQLv4として給湯が行われる。このとき、実際の湯の混合割合は54.3%であり(表3、参照)、湯が60℃、水が15℃の時には、給湯温度は40℃程度となる(40[℃]=60[℃]×0.543+15[℃]×(1−0.543))。 As described above, the hot water passing through the hot water storage tank 2 and the pilot-type solenoid valve (tank side solenoid valve 13) side does not come out when the total amount of water is small, so the hot water supply flow level L LV1 (3L before switching to the shower) / min), hot water is supplied with the mixing ratio level QLv controlled by the mixing flow rate control means 35 as QLv4 where hot water is easily produced. At this time, the actual mixing ratio of hot water is 54.3% (see Table 3). When hot water is 60 ° C and water is 15 ° C, the hot water supply temperature is about 40 ° C (40 [° C] = 60 [° C ] × 0.543 + 15 [° C.] × (1-0.543)).

そして、シャワーに切り替えたときに、例えば給湯流量レベルがLLV4(12L/min)となると、混合比レベルQLvが4のままだと、実際の湯の混合割合が82.9%となり(表3、参照)、湯が60℃、水が15℃の時には、給湯温度は52℃程度となる(52[℃]=60[℃]×0.829+15[℃]×(1−0. 829))。 And when switching to the shower, for example, if the hot water supply flow level is L LV4 (12 L / min), if the mixing ratio level QLv remains 4, the actual hot water mixing ratio will be 82.9% (see Table 3) ) When the hot water is 60 ° C. and the water is 15 ° C., the hot water supply temperature is about 52 ° C. (52 [° C.] = 60 [° C.] × 0.829 + 15 [° C.] × (1−0.829)).

そこで、この流量変化を給湯流量微分値として捉え、以下のような制御を行う。つまり、給水流量センサ29により検出される検出流量に基づいて予め定められる単位時間毎の給湯流量微分値を求める給湯微分値算出手段と、この給湯微分値算出手段により求めた給湯流量微分値が予め定められる設定微分値以上となったときには、流量変化量に対応させて混合比レベルを強制的にシフトさせるようにする混合比レベル変更指令手段とを設ける。   Therefore, this flow rate change is regarded as a hot water supply flow rate differential value, and the following control is performed. That is, a hot water supply differential value calculating means for obtaining a hot water supply flow rate differential value determined in advance per unit time based on a detected flow rate detected by the water supply flow rate sensor 29, and a hot water supply flow rate differential value obtained by the hot water supply differential value calculation means are obtained in advance. Mixing ratio level change command means is provided for forcibly shifting the mixing ratio level in accordance with the flow rate change amount when the predetermined differential value is reached.

そして、前記のように給湯中の給湯流量が3リットル/分から急に12リットル/分に変化すると、この急激な給湯流量変化に対応して前記給湯流量微分値が設定微分値以上となるので、混合比レベル4で設定温度の湯が出ていたとすると(図13(a))、混合比レベル変更指令手段が混合比レベル8(53.1%(LLV4(12L/min))へ強制的にシフトさせる(図13(b))。なお、図13では理解を助けるために、QLvの4はLLV1(3L/min)時に50.0%、QLvの8はLLV4(12L/min)時で50.0%として図示されている。 And, as described above, when the hot water supply flow rate during hot water supply suddenly changes from 3 liters / minute to 12 liters / minute, the hot water supply flow rate differential value becomes equal to or greater than the set differential value in response to this rapid hot water supply flow rate change. If hot water of the set temperature has come out at the mixture ratio level 4 (FIG. 13A), the mixture ratio level change command means forcibly shifts to the mixture ratio level 8 (53.1% (L LV4 (12 L / min)). In order to help understanding, in FIG. 13, QLv 4 is 50.0% at L LV1 (3 L / min), and QLv 8 is 50.0% at L LV4 (12 L / min). As shown.

なお、本発明は、前記実施例に限定されるものでなく、適宜設定されるものである。例えば前記各実施例では、タンク湯水混合器12と水混合器14は共に、ステッピングモータ51,53のステップ数が多いほど開弁量が大きくなるように形成されていて、これらを操作する制御データとして図2(a)および図7(a)の特性線a、bにそれぞれ示されるような混合比とステッピングモータ51,53のステップ数の関係データを与えたが、タンク湯水混合器12と水混合器14を共に、ステッピングモータ51,53のステップ数が多いほど開弁量が小さくなるように形成されてもよい。   In addition, this invention is not limited to the said Example, It sets suitably. For example, in each of the above-described embodiments, both the tank hot water mixer 12 and the water mixer 14 are formed such that the valve opening amount increases as the number of steps of the stepping motors 51 and 53 increases. As shown in FIG. 2A and FIG. 7A, the relationship data between the mixing ratio and the number of steps of the stepping motors 51 and 53 as shown in the characteristic lines a and b, respectively, is given. Both the mixers 14 may be formed so that the valve opening amount decreases as the number of steps of the stepping motors 51 and 53 increases.

その場合は、例えば、図2(a)に示した操作量の制御データの代わりに、湯量制御の操作量としてのステッピングモータ51のステップ数を図14(a)の特性線a’に示すようなデータとし、水量制御の操作量としてのステッピングモータ53のステップ数を図14(a)の特性線b’に示すようなデータとしたり、図7(a)に示した操作量の制御データの代わりに、湯量制御の操作量としてのステッピングモータ51のステップ数を図14(b)の特性線a’に示すようなデータとし、水量制御の操作量としてのステッピングモータ53のステップ数を図14(a)の特性線b’に示すようなデータとするとよい。   In this case, for example, the number of steps of the stepping motor 51 as the operation amount of the hot water amount control is represented by the characteristic line a ′ in FIG. 14A instead of the operation amount control data shown in FIG. 14A, the number of steps of the stepping motor 53 as the operation amount of the water amount control is the data as shown by the characteristic line b ′ in FIG. 14A, or the control data of the operation amount shown in FIG. Instead, the number of steps of the stepping motor 51 as the operation amount of the hot water amount control is data as shown by the characteristic line a ′ in FIG. 14B, and the number of steps of the stepping motor 53 as the operation amount of the water amount control is shown in FIG. The data may be as indicated by the characteristic line b ′ in (a).

さらに、タンク湯水混合器12と水混合器14のステッピングモータ51,53のうち、いずれか一方はステップ数が多いほど開弁量が大きくなるように形成されていて、他方はステップ数が多いほど開弁量が小さくなるように形成されていてもよく、その場合には、例えば以下のようにすることができる。   Further, one of the stepping motors 51 and 53 of the tank hot water mixer 12 and the water mixer 14 is formed such that the valve opening amount increases as the number of steps increases, and the other increases as the number of steps increases. It may be formed so that the valve opening amount is small. In that case, for example, the following can be performed.

つまり、タンク湯水混合器12のステッピングモータ51はステップ数が多いほど開弁量が大きくなるように形成されていて、水混合器14のステッピングモータ53はステップ数が多いほど開弁量が小さくなるように形成されている場合には、例えば図2(a)の特性線aと図14(a)の特性線b’の組み合わせとする、あるいは、図7(a)の特性線aと図14(a)の特性線b’の組み合わせとする。   That is, the stepping motor 51 of the tank hot water / water mixer 12 is formed so that the valve opening amount increases as the number of steps increases, and the stepping motor 53 of the water mixer 14 decreases as the number of steps increases. For example, the characteristic line a in FIG. 2A and the characteristic line b ′ in FIG. 14A are combined, or the characteristic line a in FIG. 7A and FIG. A combination of the characteristic line b ′ in (a).

その逆に、タンク湯水混合器12のステッピングモータ51はステップ数が多いほど開弁量が小さくなるように形成されていて、水混合器14のステッピングモータ53はステップ数が多いほど開弁量が大きくなるように形成されている場合には、図14(a)の特性線a’と図2(a)の特性線bの組み合わせとする、あるいは、図14(a)の特性線a’と図7(a)の特性線bの組み合わせとする。   Conversely, the stepping motor 51 of the tank hot water mixer 12 is formed such that the valve opening amount decreases as the number of steps increases, and the stepping motor 53 of the water mixer 14 increases as the number of steps increases. When formed so as to be large, the characteristic line a ′ in FIG. 14A and the characteristic line b in FIG. 2A are combined, or the characteristic line a ′ in FIG. It is assumed that the characteristic line b in FIG.

さらに、制御データは必ずしも図2(a)、図7(a)、図14(a)に示されるような、湯と水の混合比と混合比に対応する湯量制御の操作量と水量制御の操作量とを連続的な値として与えるとは限らず、図14(c)に示されるように、断続的な湯と水の混合比(混合レベル)に対してそれぞれ湯量制御の操作量と水量制御の操作量を定めた関係データとしてもよい(図14(c)の例は、図2(a)の例に対応するデータである)。また、制御データは、グラフデータとは限らず、テーブルデータや演算式等により与えてもよい。   Further, the control data is not necessarily limited to the operation amount of the hot water amount control and the water amount control corresponding to the mixing ratio and the mixing ratio of hot water and water as shown in FIGS. 2 (a), 7 (a), and 14 (a). The operation amount is not always given as a continuous value. As shown in FIG. 14C, the operation amount and the water amount for hot water control with respect to the intermittent hot water and water mixing ratio (mixing level), respectively. It is good also as the relational data which defined the operation amount of control (The example of FIG.14 (c) is data corresponding to the example of Fig.2 (a)). Further, the control data is not limited to graph data, and may be given by table data, arithmetic expressions, or the like.

さらに、タンク湯水混合器12と水混合器14は、必ずしもステッピングモータにより弁の開弁量を調節するタイプの貯湯槽出湯量調節手段と給水量調節手段とするとは限らず、本発明は、例えば図2(a)、図7(a)、図14(a)〜(b)に示したような、水圧変化に伴って湯の混合比に対して湯の流量比が小さくなる分を水流量または湯流量で補う方向に操作するようにした、混合湯水の各設定温度に対する湯と水の混合比と各混合比に対する湯量制御と水量制御の操作量との適宜の関係データを制御データとして予め与え、該制御データに基づいてミキシング流量制御手段35が混合湯水の設定温度に対応する混合比から湯量制御と水量制御の操作量をそれぞれ求めて、その求めた操作量で貯湯槽出湯量調節手段と給水量調節手段を制御することにより設定温度の混合湯水を作り出す構成とすればよい。   Further, the tank hot water / water mixer 12 and the water mixer 14 are not necessarily a type of hot water tank discharge hot water amount adjusting means and water supply amount adjusting means of adjusting the valve opening amount by a stepping motor. As shown in FIGS. 2 (a), 7 (a), and 14 (a) to 14 (b), the flow rate of hot water becomes smaller with respect to the mixing ratio of hot water as the water pressure changes. Alternatively, the control data is preliminarily set as control data, which is operated in the direction supplemented by the hot water flow rate, and appropriate relational data between the mixing ratio of hot water and water with respect to each set temperature of the mixed hot water, and the operation amount of the hot water control and the water flow control with respect to each mixing ratio. Based on the control data, the mixing flow rate control means 35 obtains the operation amount of the hot water amount control and the water amount control from the mixing ratio corresponding to the set temperature of the mixed hot water, respectively, and uses the obtained operation amount to adjust the hot water tank discharge amount adjustment means. And water supply adjustment means Control may be configured to produce mixed hot water of setting temperature by.

さらに、実施例では、タンク側電磁弁13はパイロット方式の電磁弁により形成したが、タンク側電磁弁13の種類は特に限定されるものでなく、適宜設定されるものである。   Furthermore, in the embodiment, the tank side electromagnetic valve 13 is formed by a pilot type electromagnetic valve, but the type of the tank side electromagnetic valve 13 is not particularly limited and may be set as appropriate.

さらに、本発明の熱源装置の詳細なシステム構成は適宜設定されるものであり、貯湯槽2と出湯通路9と、該出湯通路9と給水通路8bとが合流する合流部10とを備え、ミキシング流量制御手段によって出湯通路9と給水通路8bとから合流部10側に流れる湯水や水の流量を制御して設定混合温度の混合湯水が合流部10で形成されるようにする構成を有していればよい。ただし、合流部10を通った混合湯水を必要に応じて給湯器16等の補助熱源装置で追い加熱できるようにすることが望ましい。なお、給湯器16は、給湯熱交換器17を例えば石油燃焼式のバーナ装置により加熱するタイプの給湯器としてもよいし、電気ヒータにより加熱するタイプの給湯器としてもよい。   Furthermore, the detailed system configuration of the heat source device of the present invention is appropriately set, and includes a hot water storage tank 2, a hot water passage 9, and a junction 10 where the hot water passage 9 and the water supply passage 8b merge, and is mixed. The flow rate control means controls the flow rate of hot water or water flowing from the outlet hot water passage 9 and the water supply passage 8b to the merge portion 10 side so that the mixed hot water of the set mixed temperature is formed in the merge portion 10. Just do it. However, it is desirable that the mixed hot water passing through the junction 10 can be additionally heated by an auxiliary heat source device such as the hot water heater 16 as necessary. The hot water heater 16 may be a hot water heater of a type that heats the hot water heat exchanger 17 by, for example, an oil combustion type burner device, or may be a hot water heater of a type that is heated by an electric heater.

さらに、前記実施例では、貯湯槽2は燃料電池1に熱的に接続されていたが、燃料電池1の代わりに、太陽熱の集熱機やヒートポンプ等を接続してもよい。   Furthermore, in the said Example, although the hot water tank 2 was thermally connected to the fuel cell 1, you may connect a solar heat collector, a heat pump, etc. instead of the fuel cell 1. FIG.

本発明の熱源装置は、貯湯槽の湯と給水通路からの水とを簡単な制御で適切に混合し、設定温度の混合湯水を給湯流量分形成できるので、使い勝手が良好であり、例えば家庭用の熱源装置として利用できる。   The heat source device of the present invention can mix hot water of a hot water tank and water from a water supply passage appropriately with simple control, and can form mixed hot water of a set temperature for the amount of hot water supply. It can be used as a heat source device.

1 燃料電池
2 貯湯槽
3 熱回収用通路
4 タンクユニット
5 貯湯槽内湯水温検出手段
6 三方弁
7 バイパス通路
8,8a,8b 給水通路
9 出湯通路
10 合流部
11 貯湯槽出湯水温検出手段
12 タンク湯水混合器
13 タンク電磁弁
14 水混合器
15 湯水導入通路
16 給湯器
17 給湯熱交換器
23 循環ポンプ
24 電磁弁
26 FC高温サーミスタ
27 FC低温サーミスタ
28 混合サーミスタ
33 制御装置
35 ミキシング流量制御手段
36 混合設定温度設定手段
37 メモリ部
42 流量検出手段
45 給湯設定温度設定操作手段
47 燃焼制御手段
50 減圧弁
DESCRIPTION OF SYMBOLS 1 Fuel cell 2 Hot water storage tank 3 Heat recovery passage 4 Tank unit 5 Hot water temperature detection means 6 in a hot water tank 6 Three-way valve 7 Bypass passage 8, 8a, 8b Water supply passage 9 Hot water supply passage 10 Merge part 11 Hot water storage hot water temperature detection means 12 Tank hot water Mixer 13 Tank solenoid valve 14 Water mixer 15 Hot water introduction passage 16 Water heater 17 Hot water heat exchanger 23 Circulating pump 24 Solenoid valve 26 FC high temperature thermistor 27 FC low temperature thermistor 28 Mixed thermistor 33 Controller 35 Mixing flow rate control means 36 Mixing setting Temperature setting means 37 Memory section 42 Flow rate detection means 45 Hot water supply set temperature setting operation means 47 Combustion control means 50 Pressure reducing valve

Claims (4)

貯湯槽と、該貯湯槽からの湯水を送水する出湯通路と、該出湯通路と給水通路とが合流する合流部とを備え、該合流部に前記出湯通路側から流れる湯の量を可変する貯湯槽出湯量調節手段と、前記給水通路から前記合流部に流れる水の量を可変する給水量調節手段と、該給水量調節手段と前記貯湯槽出湯量調節手段を制御することにより該貯湯槽出湯量調節手段により可変される湯の流量と前記給水量調節手段により可変される水の流量を制御して前記合流部で混合湯水を形成するミキシング流量制御手段とを有し、給水温度と貯湯槽出湯水温度に対応させて前記混合湯水の各設定温度に対する湯と水の混合比と各混合比に対する湯量制御と水量制御の操作量との関係データが制御データとして予め与えられ、該制御データに基づいて前記ミキシング流量制御手段が前記混合湯水の設定温度に対応する混合比から湯量制御と水量制御の操作量をそれぞれ求め、その求めた操作量で前記貯湯槽出湯量調節手段と前記給水量調節手段を制御することにより前記設定温度の混合湯水を作り出す構成と成しており、前記合流部側に流れる湯の流路の開口量比を前記混合比に一致させる操作量の値で前記制御データの各混合比における湯量制御の操作量を与えたときに前記合流部に導入される湯の流量が前記湯の流路の水圧変化に起因して前記混合比に相当する流量よりも小さくなる分を補うように、前記制御データの各混合比における水量制御の操作量が前記合流部側に流れる水の流路の開口量比を前記混合比に一致させる操作量よりも水流量を増加させる方向に補正した値で与えられているか、前記制御データの各混合比における湯量制御の操作量が前記合流部側に流れる湯の流路の開口量比を前記混合比に一致させる操作量よりも湯流量を増加させる方向に補正した値で与えられているかの少なくとも一方であり、前記ミキシング流量制御手段により形成される前記混合湯水の流量の前記設定温度範囲における変動量が許容範囲内の変動量となるように制御される構成と成すと共に、前記制御データの各混合比における湯量制御の操作量は混合比の変化に対して湯の混合比が小さくなるにつれて湯の流量を小さくする方向に変化させる値で与えられ、前記制御データの各混合比における水量制御の操作量は混合比の変化に対して水の混合比が大きくなるにつれて水の流量を大きくする方向に変化値で与えられており、前記水量制御の操作量が水流量を増加させる方向に補正した値で与えられているときには前記湯の流路の水圧変化に起因して前記湯の流量が混合比に相当する流量よりも小さくなる分を補う方向に前記水量制御の操作量の変化割合を曲線的に変化させる値で与えられており、前記湯量制御の操作量が湯流量を増加させる方向に補正した値で与えられているときには湯の流路の水圧変化に起因して湯の流量が混合比に相当する流量よりも小さくなる分を補う方向に前記湯量制御の操作量の変化割合を曲線的に変化させる値で与えられていることを特徴とする熱源装置。 A hot water storage tank, a hot water supply passage for supplying hot water from the hot water storage tank, and a junction where the hot water supply passage and the water supply passage merge, and the hot water storage in which the amount of hot water flowing from the hot water passage side is variable at the junction By controlling the bath discharge amount adjusting means, the water supply amount adjusting means for changing the amount of water flowing from the water supply passage to the junction, the water supply amount adjusting means and the hot water storage tank discharge amount adjusting means are controlled to control the discharge from the hot water tank. And a mixing flow rate control means for controlling the flow rate of hot water variable by the hot water amount adjusting means and the flow rate of water variable by the water supply amount adjusting means to form mixed hot water at the merging portion. Corresponding data of the mixing ratio of hot water and water with respect to each set temperature of the mixed hot water and the operation amount of the hot water control with respect to each mixing ratio and the operation amount of the water flow control corresponding to the tap water temperature are given in advance as control data. Based on said Mi The single flow rate control means obtains the hot water volume control amount and the water volume control operation amount from the mixing ratio corresponding to the set temperature of the mixed hot water, respectively, and controls the hot water tank discharge hot water amount adjustment means and the water supply amount adjustment means with the obtained operation amounts. Thus, the mixed hot water of the set temperature is created, and each mixing of the control data is performed with an operation amount value that matches the opening ratio of the flow path of the hot water flowing to the merging portion side with the mixing ratio. So as to compensate for the flow rate of hot water introduced into the merging portion being smaller than the flow rate corresponding to the mixing ratio due to a change in the water pressure of the flow path of the hot water when an operation amount for hot water amount control in the ratio is given. In addition, the operation amount of the water amount control at each mixing ratio of the control data is corrected in the direction of increasing the water flow rate more than the operation amount that matches the opening amount ratio of the flow path of the water flowing to the merging portion side with the mixing ratio. Is given by value Or, the operation amount of the hot water amount control at each mixing ratio of the control data is corrected in the direction to increase the hot water flow rate rather than the operation amount that matches the opening amount ratio of the flow path of the hot water flowing to the merging portion side with the mixing ratio. And a configuration in which the fluctuation amount in the set temperature range of the flow rate of the mixed hot water formed by the mixing flow rate control means is controlled to be a fluctuation amount within an allowable range. together formed to the operation amount of hot water control in each mixing ratio of the control data is given by the value that changes in a direction to decrease the flow rate of hot water as the mixing ratio of the hot water is reduced to a change in mixing ratio, the control The operation amount of the water amount control at each mixing ratio of the data is given as a change value in the direction of increasing the water flow rate as the water mixing ratio increases with respect to the change in the mixing ratio. When the manipulated variable is given as a value corrected in the direction of increasing the water flow rate, the amount of flow of the hot water becomes smaller than the flow rate corresponding to the mixing ratio due to the change in the water pressure in the flow path of the hot water. The change rate of the operation amount of the water amount control is given as a value that changes in a curve in the direction of compensation, and when the operation amount of the hot water amount control is given as a value corrected in the direction of increasing the hot water flow rate, The flow rate of hot water is given by a value that changes the amount of change in the amount of operation of the hot water control in a curve in a direction that compensates for the flow rate of hot water that is smaller than the flow rate corresponding to the mixing ratio due to the change in water pressure in the flow path. A heat source device characterized by. 貯湯槽出湯量調節手段はパルスモータのパルス数に応じて弁の開弁量を可変することにより湯の量を可変し、給水量調節手段はパルスモータのパルス数に応じて弁の開弁量を可変することにより水の量を可変する構成と成しており、制御データにおける湯量制御の操作量と水量制御の操作量は共にパルス数で与えられ、かつ、一つの混合比に対しては湯量制御の操作量に対応するパルス数と水量制御の操作量に対応するパルス数がそれぞれ固定値として設定されていることを特徴とする請求項1記載の熱源装置。 The hot water tank discharge amount adjusting means varies the amount of hot water by varying the valve opening amount according to the number of pulses of the pulse motor, and the water supply amount adjusting means varies the valve opening amount according to the number of pulses of the pulse motor. The amount of water can be varied by varying the amount of water, and the amount of hot water control and the amount of water control in the control data are both given by the number of pulses, and for one mixing ratio claim 1 Symbol placement of the heat source apparatus, characterized in that the number of pulses is set as the fixed value corresponding to the operation amount of the pulse number and quantity control corresponding to the operation amount of the hot water control. 出湯通路には該出湯通路を通しての貯湯槽からの湯を出湯の有無を弁の開閉により切り替える開閉電磁弁が介設され、該電磁弁はパイロット方式の電磁弁により形成されていることを特徴とする請求項1または請求項2記載の熱源装置。 The hot water passage is provided with an open / close electromagnetic valve for switching the presence or absence of hot water from the hot water storage tank through the hot water passage by opening and closing the valve, and the electromagnetic valve is formed by a pilot type electromagnetic valve. claim 1 or claim 2 Symbol placement of the heat source apparatus. 合流部には該合流部で形成された混合湯水を導入して給湯熱交換器で加熱する追い加熱機能を有する補助熱源装置の湯水導入側が接続されており、前記合流部で形成される混合湯水の温度が前記混合設定温度より低いときに前記補助熱源装置による追い加熱機能による加熱によって前記混合設定温度の湯水を形成する構成と成していることを特徴とする請求項1乃至請求項のいずれか一つに記載の熱源装置。 A hot water introduction side of an auxiliary heat source device having a follow-up heating function for introducing the mixed hot water formed in the confluence portion and heating it with the hot water heat exchanger is connected to the confluence portion, and the mixed hot water formed in the confluence portion temperature of claims 1 to 3, characterized in that it forms a structure which forms a hot water of the mixed set temperature by heating by the auxiliary heat source apparatus according to pursue heating function when lower than the mix temperature setting of The heat source device according to any one of the above.
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JPH064145A (en) * 1992-06-23 1994-01-14 Kubota Corp Hot/cold water mixing device
JPH064148A (en) * 1992-06-23 1994-01-14 Kubota Corp Hot/cold water mixing device
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