JP5936076B2 - Motor drive control valve - Google Patents
Motor drive control valve Download PDFInfo
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- JP5936076B2 JP5936076B2 JP2013157984A JP2013157984A JP5936076B2 JP 5936076 B2 JP5936076 B2 JP 5936076B2 JP 2013157984 A JP2013157984 A JP 2013157984A JP 2013157984 A JP2013157984 A JP 2013157984A JP 5936076 B2 JP5936076 B2 JP 5936076B2
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 97
- 230000007423 decrease Effects 0.000 claims description 7
- 239000007789 gas Substances 0.000 description 7
- 238000002485 combustion reaction Methods 0.000 description 3
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 235000001537 Ribes X gardonianum Nutrition 0.000 description 1
- 235000001535 Ribes X utile Nutrition 0.000 description 1
- 235000016919 Ribes petraeum Nutrition 0.000 description 1
- 244000281247 Ribes rubrum Species 0.000 description 1
- 235000002355 Ribes spicatum Nutrition 0.000 description 1
- 239000000567 combustion gas Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
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- Electrically Driven Valve-Operating Means (AREA)
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Description
本発明は、例えば給湯装置に組み込まれ、熱交換器に流れる水量を調節するモータ駆動制御弁に関する。 The present invention relates to a motor drive control valve that is incorporated in, for example, a hot water supply device and adjusts the amount of water flowing in a heat exchanger.
給湯装置は熱交換器を備えており、この熱交換器に流れる水の流量と熱交換器を加熱するガスバーナの火力との双方を調節することにより所望する温度の湯を所望の水量で給湯するように構成されている。ただし、給湯温度が所定の温度以下になると、熱交換器自体の温度が低下し、そのため、ガスバーナの燃焼により生じた水蒸気が熱交換器内で結露してドレンが生じるという不具合が発生する。そのため、熱交換器から流出する湯温を所定温度以下にできない。 The hot water supply apparatus includes a heat exchanger, and hot water at a desired temperature is supplied with a desired amount of water by adjusting both the flow rate of water flowing through the heat exchanger and the heating power of the gas burner that heats the heat exchanger. It is configured as follows. However, when the hot water supply temperature falls below a predetermined temperature, the temperature of the heat exchanger itself decreases, and therefore, a problem occurs that water vapor generated by the combustion of the gas burner is condensed in the heat exchanger and drainage occurs. For this reason, the temperature of the hot water flowing out from the heat exchanger cannot be reduced below a predetermined temperature.
ところが、使用者がその所定温度より低い温度の湯を要求する場合がある。このような場合には、熱交換器に供給する水の一部をバイパスして、熱交換器に通さずに、熱交換器から流出する高温の湯に混合することによって、ドレンの発生を防止しながら給湯温度を下げることが行われている。 However, the user may request hot water having a temperature lower than the predetermined temperature. In such a case, by bypassing a part of the water supplied to the heat exchanger and mixing with the hot water flowing out of the heat exchanger without passing through the heat exchanger, the generation of drainage is prevented. While the hot water supply temperature is lowered.
このような構成を採用する場合には、全体の水量を調節するためのモータ駆動制御弁と、バイパスする水量を調節するためのモータ駆動制御弁との２個のモータ駆動制御弁を必要とすることになる（例えば、特許文献１参照）。 In the case of adopting such a configuration, two motor drive control valves, that is, a motor drive control valve for adjusting the total amount of water and a motor drive control valve for adjusting the amount of water to be bypassed are required. (For example, refer to Patent Document 1).
上記従来のものでは、上述のように２個のモータ駆動制御弁を必要とするため、モータ駆動制御弁が占める容積が大きくなると共にコストが高くなるという不具合が生じる。 In the above-mentioned conventional one, two motor drive control valves are required as described above, so that the volume occupied by the motor drive control valve increases and the cost increases.
そこで本発明は、上記の問題点に鑑み、１個のモータで全水量の他にバイパス流量を必要に応じて変更することのできるモータ駆動制御弁を提供することを課題とする。 Then, this invention makes it a subject to provide the motor drive control valve which can change a bypass flow volume as needed other than the total water quantity with one motor in view of said problem.
上記課題を解決するために本発明によるモータ駆動制御弁は、内部空間に連通する１個の入水口と、この内部空間に連通する２個の出水口とを有するハウジング内に、モータによって進退され入水口から内部空間に流入する流量を増減する主弁を入水口と内部空間との間に備えたモータ駆動制御弁において、上記２個の出水口の一方と上記内部空間との間に、この出水口側から内部空間側に付勢された副弁を設け、上記主弁の閉弁方向の移動に連動して副弁を内部空間側から押して開弁させることを特徴とする。 In order to solve the above problems, a motor drive control valve according to the present invention is advanced and retracted by a motor in a housing having one water inlet communicating with the internal space and two water outlets communicating with the internal space. In a motor drive control valve provided with a main valve between the water inlet and the internal space for increasing or decreasing the flow rate flowing into the internal space from the water inlet , between the one of the two water outlets and the internal space, A sub-valve biased from the water outlet side to the inner space side is provided, and the sub-valve is pushed from the inner space side to open in conjunction with the movement of the main valve in the valve closing direction.
上記構成では、主弁の開度を絞って全体の総流量を減少させるに伴って副弁の開度を上げ、副弁が設けられている方の出水口への流量を増加させる。例えば、この出水口をバイパス路に連結しておけば、全体の総流量が減少して給湯量が少なくなるほど、バイパス路側の流量比率を大きくして給湯温度を更に下げることができる。 In the said structure, the opening degree of a subvalve is raised as the opening degree of a main valve is restrict | squeezed and the whole total flow volume is decreased, and the flow volume to the water outlet provided with the subvalve is increased. For example, if this outlet is connected to the bypass passage, the flow rate ratio on the bypass passage side can be increased and the hot water supply temperature can be further lowered as the total flow rate decreases and the hot water supply amount decreases.
主弁が閉弁すれば副弁は全開状態になるが、上記副弁の全開状態から上記モータにより主弁の開度を増加させる途中で、副弁を閉弁方向に付勢する付勢力に抗して上記内部空間内の水圧により副弁が開弁方向に押されて、開弁状態を維持するように構成すれば、全体の総流量が増加した状態でバイパス路にある程度の水流を確保することができる。 When the main valve is closed, the sub valve is fully opened, but the energizing force that urges the sub valve in the valve closing direction while increasing the opening of the main valve by the motor from the fully opened state of the sub valve. On the other hand, if the sub-valve is pushed in the valve opening direction by the water pressure in the internal space to maintain the valve open state, a certain amount of water flow is secured in the bypass passage with the total total flow rate increased. can do.
以上の説明から明らかなように、本発明は、１個のモータで主弁を駆動すると共に、主弁の開度の変化に伴って副弁の開度を変えることができるようにした。 As is apparent from the above description, the present invention enables the main valve to be driven by a single motor and the opening of the sub-valve to be changed as the opening of the main valve changes.
図１を参照して、１は本発明によるモータ駆動制御弁の一例である。本モータ駆動制御弁１は樹脂製である中空のハウジング２を有している。このハウジング２の内部には空間２１が形成されており、この空間２１には１個の入水口２２と２個の出水口として主出水口２３及び副出水口２４との３系統の通水口が連結されている。なお、１０は入水口２２から流入する水の総流量を検知する流量計部である。 Referring to FIG. 1, 1 is an example of a motor drive control valve according to the present invention. The motor drive control valve 1 has a hollow housing 2 made of resin. A space 21 is formed inside the housing 2. In this space 21, there are three water inlets including a main water inlet 23 and a sub water outlet 24 as one water inlet 22 and two water outlets. It is connected. Reference numeral 10 denotes a flow meter unit that detects the total flow rate of water flowing from the water inlet 22.
入水口２２と空間２１と間には主弁３が設けられている。この主弁３はステッピングモータ４によって進退駆動される。ステッピングモータ４の出力軸４１はステッピングモータ４内で図示しないスプラインによって連結されており、従って、回転すると共に軸線方向（スラスト方向）に自由に移動することができる。そしてこの出力軸４１は固定ブラケット１１に対して台形ネジを介して螺合しており、出力軸４１が１回転する毎に台形ネジのピッチに相当する距離だけ前進または後退することになる。なお、図１に示す状態では主弁３は前進端位置である閉弁位置に有り、従って、入水口２２と空間２１とは、この主弁３によって隔絶されている。従って，外部からの水は空間２１内に流れ込むことはない。 A main valve 3 is provided between the water inlet 22 and the space 21. The main valve 3 is driven forward and backward by a stepping motor 4. The output shaft 41 of the stepping motor 4 is connected within the stepping motor 4 by a spline (not shown). Therefore, the output shaft 41 rotates and can freely move in the axial direction (thrust direction). The output shaft 41 is screwed to the fixed bracket 11 via a trapezoidal screw, and is moved forward or backward by a distance corresponding to the pitch of the trapezoidal screw every time the output shaft 41 rotates. In the state shown in FIG. 1, the main valve 3 is in the closed position which is the forward end position, and therefore the water inlet 22 and the space 21 are isolated by the main valve 3. Therefore, the water from the outside does not flow into the space 21.
主出水口２３は給湯装置の熱交換器６に連結されており、上記主弁３が開弁して入水口２２から空間２１に水が流入すると、その水を主出水口２３から熱交換器６へと流すことになる。熱交換器６の下方には図示しないガスバーナが設けられており、熱交換器６内を流れる水をガスバーナの燃焼ガスで加熱して湯として流出させる。 The main outlet 23 is connected to the heat exchanger 6 of the hot water supply device. When the main valve 3 is opened and water flows into the space 21 from the inlet 22, the water flows from the main outlet 23 to the heat exchanger. Will flow to 6. A gas burner (not shown) is provided below the heat exchanger 6, and water flowing in the heat exchanger 6 is heated by the combustion gas of the gas burner and flows out as hot water.
副出水口２４は熱交換器６の出湯側に連結されている。そして、副出水口２４と空間２１との間には副弁５が配置されている。従って、この副弁５が開弁すると空間２１内の水が熱交換器６をバイパスして、熱交換器６で加熱された湯と副出水口２４からの水とが混合されて、台所のカランなどへ給湯されるように構成されている。 The sub-water outlet 24 is connected to the hot water side of the heat exchanger 6. A sub valve 5 is arranged between the sub water outlet 24 and the space 21. Therefore, when the auxiliary valve 5 is opened, the water in the space 21 bypasses the heat exchanger 6, and the hot water heated by the heat exchanger 6 and the water from the auxiliary outlet 24 are mixed, and the kitchen It is configured to supply hot water to currants.
副弁５は複数本の樹脂製の支持体５１で支持され、かつ支持体５１の弾性力によって弁座５２に近づく方向へ付勢されている。この弾性力は空間２１内の水圧に抗して副弁５を弁座５２方向、すなわち閉弁方向に移動させるだけの大きさの付勢力となるように設定した。 The sub-valve 5 is supported by a plurality of resin supports 51 and is biased in a direction approaching the valve seat 52 by the elastic force of the support 51. This elastic force was set so as to be an urging force large enough to move the auxiliary valve 5 in the valve seat 52 direction, that is, in the valve closing direction against the water pressure in the space 21.
上記主弁３の中央を貫通してロッド３１が設けられている。図１に示す状態では上述のように、主弁３は閉弁しているが、その状態ではロッド３１も前進端位置に有り、ロッド３１の先端で副弁５を開弁方向に押して強制的に開弁させるようにした。従って、図１に示す状態では副弁５は最大開度で開弁しているが、主弁３が閉弁しているため空間２１内の水は主出水口２３及び副出水口２４のいずれからも出水されない状態にある。 A rod 31 is provided through the center of the main valve 3. In the state shown in FIG. 1, as described above, the main valve 3 is closed, but in this state, the rod 31 is also in the forward end position, and the auxiliary valve 5 is pushed in the valve opening direction at the tip of the rod 31 to forcibly. To open the valve. Accordingly, in the state shown in FIG. 1, the auxiliary valve 5 is opened at the maximum opening, but since the main valve 3 is closed, the water in the space 21 is either the main outlet 23 or the auxiliary outlet 24. It is in a state where it is not drained from.
図２を参照して、ステッピングモータ４を駆動して主弁３を開弁させると、入水口２２から空間２１内に水が流入する。主弁３の開度が小さい状態では、副弁５は開度は減少しているが開弁状態であるので、空間２１内の水は主出水口２３及び副出水口２４の双方から流出する。主弁３の開度をさらに大きくして全開状態にすると、ロッド３１が後退して副弁５から離れるので、副弁５は支持体５１の付勢力によって閉弁する。すると、空間２１内に流れ込んだ水は全て主出水口２３から熱交換器６へと流れることになる。 Referring to FIG. 2, when the stepping motor 4 is driven to open the main valve 3, water flows into the space 21 from the water inlet 22. In the state where the opening degree of the main valve 3 is small, the opening degree of the sub valve 5 is reduced but the valve is open, so that the water in the space 21 flows out from both the main outlet 23 and the auxiliary outlet 24. . When the opening degree of the main valve 3 is further increased and fully opened, the rod 31 moves backward from the sub valve 5, so that the sub valve 5 is closed by the urging force of the support 51. Then, all the water that has flowed into the space 21 flows from the main outlet 23 to the heat exchanger 6.
この流量の変化を図３を参照して詳述する。主弁３の開度が図１に示す全閉状態、すなわち開度０の状態では、上述のように主出水口２３および副出水口２４のいずれからも出水されない。図３ではＡ１は主出水口２３からの出水の流量を表し、Ａ２は副出水口２４からの出水の流量を表している。 This change in flow rate will be described in detail with reference to FIG. When the opening degree of the main valve 3 is in the fully closed state shown in FIG. 1, that is, the opening degree is 0, no water is discharged from either the main outlet 23 or the auxiliary outlet 24 as described above. In FIG. 3, A1 represents the flow rate of the water discharged from the main water outlet 23, and A2 represents the flow rate of the water discharged from the auxiliary water outlet 24.
主弁３が開弁し出すと主弁３の開度の増加に伴って主出水口２３および副出水口２４からの出水流量が増加する。副出水口２４からの出水流量は、当所は主弁３の開度の増加に伴って増加するが、副弁５の開度は主弁３の開度の増加に連動して減少するので、副弁５の開度がある程度まで減少すると、それ以降の減少に伴って副出水口２４からの出水流量は減少して、最終的に副弁５が閉弁すると出水流量は０になる。ただし、副弁５を閉弁方向に付勢している付勢力を調節して、空間２１内の水圧が副弁５を押圧する力より小さな付勢力で副弁５を付勢しておけば、破線のＡ２１に示すように副弁５は完全に閉弁せず、途中から空間２１内の水圧によって徐々に開度を広げて副出水口２４からの出水流量が増加に転じることになる。 When the main valve 3 starts to open, the flow rate of water discharged from the main water outlet 23 and the sub water outlet 24 increases as the opening of the main valve 3 increases. The flow rate of water discharged from the sub-water outlet 24 increases as the opening of the main valve 3 increases, but the opening of the sub-valve 5 decreases as the opening of the main valve 3 increases. When the opening degree of the auxiliary valve 5 is reduced to a certain extent, the outlet water flow rate from the auxiliary outlet port 24 is reduced with the subsequent reduction, and when the auxiliary valve 5 is finally closed, the outlet water flow rate becomes zero. However, if the biasing force that biases the sub-valve 5 in the valve closing direction is adjusted, the sub-valve 5 is biased with a biasing force that is smaller than the force with which the water pressure in the space 21 presses the sub-valve 5. As indicated by the broken line A21, the sub-valve 5 is not completely closed, and the opening degree is gradually widened by the water pressure in the space 21 from the middle, and the flow rate of the water discharged from the sub-water outlet 24 starts to increase.
さらに、図４を参照して、本図では主弁３を通過する水量、すなわち全水量をＢで示し、Ｃは主出水口２３および副出水口２４からの各々の出水流量の比を表している。具体的には、（副出水口２４からの出水流量）／（主出水口２３からの出水流量）である。 Further, referring to FIG. 4, in this figure, the amount of water passing through the main valve 3, that is, the total amount of water is indicated by B, and C represents the ratio of the respective outlet flow rates from the main outlet 23 and the auxiliary outlet 24. Yes. Specifically, the flow rate of the water discharged from the auxiliary water outlet 24 / (the flow rate of the water discharged from the main water outlet 23).
主弁３の開度が増加するのに伴って全水量も増加するが、途中で副弁５が閉弁するので全水量の増加速度は鈍る。また、主弁３が開弁を開始した時点では副出水口２４からの出水流量と主出水口２３からの出水流量とはほぼ１：１であるが、その後、副出水口２４からの出水流量は減少し、主出水口２３からの出水流量は増加するので、分配比は主弁３の開度の増加に伴って減少する。なお、上記図３でのＡ２１と同様に副弁５に対する付勢力を調節することにより、分配比は０に収束せず、Ｃ１に示すように増加に転じさせることができる。 Although the total water amount increases as the opening degree of the main valve 3 increases, the increase rate of the total water amount is slowed because the sub-valve 5 is closed on the way. Further, when the main valve 3 starts to open, the flow rate of water discharged from the sub-water outlet 24 and the flow rate of water discharged from the main water-discharge port 23 are approximately 1: 1. Decreases, and the flow rate of water discharged from the main water outlet 23 increases, so that the distribution ratio decreases as the opening of the main valve 3 increases. In addition, by adjusting the urging force with respect to the sub-valve 5 similarly to A21 in FIG. 3, the distribution ratio does not converge to 0, but can be increased as indicated by C1.
上記構成であるので、例えば低温の湯を小流量で給湯する場合、主弁３の開度を小さくしてガスバーナの燃焼量を小さくするが、ガスバーナの燃焼量をあまり小さくすると熱交換器６でドレンが生じる。そのため、熱交換器６から送り出される湯温をある程度以下に下げることができないので、副弁５の開度を大きくして副出水口２４から流出する水量を多くする。また、主弁３の開度を大きくすると熱交換器６に流れる流量が増加して熱交換器６が冷却されるので、やはりガスバーナの火力をある程度以上にしなければならない。その場合には副弁５を完全に閉弁させるのではなく、上記のように副弁５に対する付勢力を弱めておき、主弁３が全開時にも副弁５がある程度の開度を維持することが望ましい。 When the hot water is supplied at a small flow rate, for example, the opening of the main valve 3 is reduced to reduce the combustion amount of the gas burner. However, if the combustion amount of the gas burner is reduced too much, the heat exchanger 6 Drain is generated. For this reason, the temperature of the hot water fed from the heat exchanger 6 cannot be lowered to a certain level, so that the amount of water flowing out from the auxiliary outlet 24 is increased by increasing the opening of the auxiliary valve 5. Moreover, since the flow volume which flows into the heat exchanger 6 will increase when the opening degree of the main valve 3 is enlarged and the heat exchanger 6 is cooled, the thermal power of a gas burner must be more than a certain degree. In that case, the auxiliary valve 5 is not completely closed, but the biasing force to the auxiliary valve 5 is weakened as described above, and the auxiliary valve 5 maintains a certain degree of opening even when the main valve 3 is fully opened. It is desirable.
ただし、副弁５に対する付勢力は上記の支持体５１の本数や形状によって調節することになるが、その構造では付勢力の調節が比較的難しい場合には、図５に示すように、副弁５をバネ３２で付勢するように構成してもよい。 However, the urging force for the auxiliary valve 5 is adjusted according to the number and shape of the above-mentioned support bodies 51. However, when it is relatively difficult to adjust the urging force with the structure, as shown in FIG. 5 may be configured to be biased by a spring 32.
なお、本発明は上記した形態に限定されるものではなく、本発明の要旨を逸脱しない範囲内において種々の変更を加えてもかまわない。 In addition, this invention is not limited to an above-described form, You may add a various change in the range which does not deviate from the summary of this invention.
１ モータ駆動制御弁
２ ハウジング
３ 主弁
４ ステッピングモータ
５ 副弁
６ 熱交換器
２１ 空間
２２ 入水口
２３ 主出水口
２４ 副出水口
３１ ロッド
３２ バネ
５１ 支持体
DESCRIPTION OF SYMBOLS 1 Motor drive control valve 2 Housing 3 Main valve 4 Stepping motor 5 Sub valve 6 Heat exchanger 21 Space 22 Water inlet 23 Main water outlet 24 Sub water outlet 31 Rod 32 Spring 51 Support body
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| JP2013157984A JP5936076B2 (en) | 2013-07-30 | 2013-07-30 | Motor drive control valve |
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| JP2013157984A JP5936076B2 (en) | 2013-07-30 | 2013-07-30 | Motor drive control valve |
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| JP2015028364A JP2015028364A (en) | 2015-02-12 |
| JP5936076B2 true JP5936076B2 (en) | 2016-06-15 |
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| JP2018109481A (en) * | 2017-01-06 | 2018-07-12 | 株式会社ノーリツ | Heating water heater |
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| JP2676954B2 (en) * | 1989-12-11 | 1997-11-17 | 松下電器産業株式会社 | Discharge port switching device |
| JPH03204487A (en) * | 1989-12-29 | 1991-09-06 | Matsushita Electric Ind Co Ltd | Electromagnetic change-over valve |
| JP5144607B2 (en) * | 2009-07-30 | 2013-02-13 | リンナイ株式会社 | Three-way valve |
| JP5726426B2 (en) * | 2010-03-17 | 2015-06-03 | 株式会社不二工機 | Three-way electric valve and heat pump device equipped with the valve |
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