JP7002876B2 - Check valve control system and fuel cell system - Google Patents

Check valve control system and fuel cell system Download PDF

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JP7002876B2
JP7002876B2 JP2017145552A JP2017145552A JP7002876B2 JP 7002876 B2 JP7002876 B2 JP 7002876B2 JP 2017145552 A JP2017145552 A JP 2017145552A JP 2017145552 A JP2017145552 A JP 2017145552A JP 7002876 B2 JP7002876 B2 JP 7002876B2
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sealing
valve body
fully closed
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衛 吉岡
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Aisan Industry Co Ltd
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    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
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    • Y02E60/30—Hydrogen technology
    • Y02E60/50—Fuel cells

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Description

本開示は、流路を開閉する封止弁の開閉動作を制御する封止弁制御システム、および、この封止弁制御システムを有する燃料電池システムに関するものである。 The present disclosure relates to a sealing valve control system that controls an opening / closing operation of a sealing valve that opens / closes a flow path, and a fuel cell system having the sealing valve control system.

従来技術として、特許文献１に開示されるような燃料電池システムが存在する。この燃料電池システムは、水素ガスの配管系より供給される水素ガスおよび酸素ガスの配管系より供給される酸素ガスの供給を受けて、電力を発生する燃料電池を備えている。そして、酸素ガスの配管系は、酸素オフガス排気流路と、酸素オフガス排気流路を開閉する電磁バルブを備えている。 As a prior art, there is a fuel cell system as disclosed in Patent Document 1. This fuel cell system includes a fuel cell that generates electric power by being supplied with hydrogen gas supplied from a hydrogen gas piping system and oxygen gas supplied from an oxygen gas piping system. The oxygen gas piping system includes an oxygen off-gas exhaust flow path and an electromagnetic valve that opens and closes the oxygen off-gas exhaust flow path.

特開２００５－２８５６８６号公報Japanese Unexamined Patent Publication No. 2005-285686

上記した電磁バルブのようにガス流路を開閉する封止弁について、弁座と弁体との間の封止性（シール性）を向上させるため弁座における弁体との接触部分にゴムシール部を備える場合がある。この場合、開弁状態の封止弁が閉弁するときに、弁座に備わるゴムシール部が弁体との間に生じる摺動抵抗により捩れて、ゴムシール部における弁体と接触するシート面にて凹凸が生じて、全閉状態の封止弁においてガス洩れが発生するおそれがある。 For a sealing valve that opens and closes the gas flow path like the above-mentioned solenoid valve, a rubber seal is provided at the contact portion of the valve seat with the valve body in order to improve the sealing property (sealing property) between the valve seat and the valve body. May be provided. In this case, when the sealing valve in the valve open state is closed, the rubber seal portion provided on the valve seat is twisted by the sliding resistance generated between the valve seat and the valve body, and the seat surface in the rubber seal portion is in contact with the valve body. There is a risk that unevenness will occur and gas leakage will occur in the fully closed sealing valve.

そこで、本開示は上記した問題点を解決するためになされたものであり、全閉状態の封止弁においてガス洩れを防ぐことができる封止弁制御システムおよび燃料電池システムを提供することを目的とする。 Therefore, the present disclosure has been made in order to solve the above-mentioned problems, and an object of the present invention is to provide a sealing valve control system and a fuel cell system capable of preventing gas leakage in a fully closed sealing valve. And.

上記課題を解決するためになされた本開示の一形態は、ガスが流れるガス流路と、前記ガス流路を開閉する封止弁と、前記封止弁の開閉動作を制御する制御部とを備える封止弁制御システムにおいて、前記封止弁は、弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、前記制御部は、前記封止弁による封止要求があるときに、前記弁座又は前記弁体と前記シール部材とを摺動させた状態で前記弁体の開弁方向の移動量よりも前記弁体の閉弁方向の移動量を大きくしながら前記弁体を開弁方向と閉弁方向へ移動させる開閉制御を行い、前記弁体を閉弁方向へ移動させる制御を行った際に、前記封止弁が全閉状態における所定の開度未満となったときに、前記開閉制御を完了すること、を特徴とする。 One embodiment of the present disclosure made to solve the above problems includes a gas flow path through which gas flows, a sealing valve for opening and closing the gas flow path, and a control unit for controlling the opening and closing operation of the sealing valve. In the sealing valve control system provided, the sealing valve is provided with a sealing member for sealing between the valve body and the valve seat on either the valve seat or the valve body, and the control unit is provided. Is the amount of movement of the valve body in the valve opening direction in a state where the valve seat or the valve body and the seal member are slid when there is a sealing request by the sealing valve. When the opening / closing control is performed to move the valve body in the valve opening direction and the valve closing direction while increasing the movement amount in the valve closing direction, and the control is performed to move the valve body in the valve closing direction, the sealing is performed. The opening / closing control is completed when the valve becomes less than a predetermined opening degree in the fully closed state .

この態様によれば、開弁状態の封止弁を閉弁させて全閉状態にするまでに、弁体または弁座とシール部材とを摺動させながら、弁体を開弁方向と閉弁方向へ移動させるように制御する。これにより、シール部材の捩れを解消（抑制）させながら、シール部材における弁体または弁座との接触面を平面にして、封止弁を全閉状態にすることができる。そして、これにより、封止弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。そのため、弁体または弁座とシール部材の間において、シール幅の確保と接地状態の安定化の両立を図ることができる。したがって、封止弁を全閉状態にしたときに、弁体または弁座とシール部材との間において、封止性が向上し、ガス洩れを防ぐことができる。 According to this aspect, the valve body is opened in the valve opening direction and the valve is closed while sliding the valve body or the valve seat and the seal member until the sealing valve in the valve open state is closed to the fully closed state. Control to move in the direction. As a result, the sealing valve can be fully closed by making the contact surface of the sealing member with the valve body or the valve seat flat while eliminating (suppressing) the twist of the sealing member. As a result, the ground contact state between the valve body or the valve seat and the seal member in the fully closed state of the sealing valve is stabilized. Therefore, it is possible to secure the seal width and stabilize the ground contact state between the valve body or the valve seat and the seal member. Therefore, when the sealing valve is fully closed, the sealing property is improved between the valve body or the valve seat and the sealing member, and gas leakage can be prevented.

上記の態様においては、前記開閉制御では、前記弁体を開弁方向と閉弁方向へ繰り返し移動させること、が好ましい。 In the above aspect, in the opening / closing control, it is preferable to repeatedly move the valve body in the valve opening direction and the valve closing direction.

この態様によれば、開弁状態の封止弁を閉弁させて全閉状態にするまでに、弁体または弁座とシール部材とを摺動させながら、弁体を開弁方向と閉弁方向へ繰り返し移動させて、徐々に開度が小さくなるように制御する。これにより、より効果的に、シール部材の捩れを解消させながら、シール部材における弁体または弁座との接触面を平面にして、封止弁を全閉状態にすることができる。そして、これにより、より効果的に、封止弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。 According to this aspect, the valve body is opened in the valve opening direction and the valve is closed while sliding the valve body or the valve seat and the seal member until the sealing valve in the valve open state is closed to the fully closed state. It is repeatedly moved in the direction and controlled so that the opening gradually decreases. As a result, the sealing valve can be fully closed by making the contact surface of the sealing member with the valve body or the valve seat flat while eliminating the twist of the sealing member more effectively. As a result, more effectively, the ground contact state between the valve body or the valve seat and the seal member in the fully closed state of the sealing valve is stabilized.

上記の態様においては、前記制御部は、前記封止弁を全閉状態にした後に、前記弁体を前記弁座に押し付ける方向に作用させる全閉保持制御と、前記弁体を前記弁座から離す方向に作用させる全閉保持解除制御と、を行うこと、が好ましい。 In the above aspect, the control unit performs a fully closed holding control that causes the valve body to act in a direction of pressing the valve body against the valve seat after the sealing valve is fully closed, and the valve body is moved from the valve seat. It is preferable to perform fully closed holding release control that acts in the direction of separation.

この態様によれば、封止弁を全閉状態にした後に、全閉保持制御と全閉保持解除制御とを行うことで、シール部材の捩れを解消させることができる。これにより、封止弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。 According to this aspect, the twist of the seal member can be eliminated by performing the fully closed holding control and the fully closed holding release control after the sealing valve is fully closed. As a result, the ground contact state between the valve body or the valve seat and the seal member in the fully closed state of the sealing valve is stabilized.

上記の態様においては、前記制御部は、前記全閉保持制御と前記全閉保持解除制御とを繰り返し行うこと、が好ましい。 In the above aspect, it is preferable that the control unit repeatedly performs the fully closed holding control and the fully closed holding release control.

この態様によれば、全閉保持制御と全閉保持解除制御とを繰り返し行うことで、より効果的に、シール部材の捩れを解消させることができる。これにより、より効果的に、封止弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。 According to this aspect, the twisting of the seal member can be more effectively eliminated by repeatedly performing the fully closed holding control and the fully closed holding release control. This more effectively stabilizes the ground contact state between the valve body or the valve seat and the seal member in the fully closed state of the sealing valve.

上記課題を解決するためになされた本開示の他の形態は、ガスが流れるガス流路と、前記ガス流路を開閉する封止弁と、前記封止弁の開閉動作を制御する制御部とを備える封止弁制御システムにおいて、前記封止弁は、弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、前記制御部は、前記封止弁を全閉状態にした後に、前記弁体を前記弁座に押し付ける方向に作用させる全閉保持制御と、前記弁体を前記弁座から離す方向に作用させる全閉保持解除制御と、を行い、前記全閉保持制御を行って、前記全閉保持制御と前記全閉保持解除制御とからなる制御を完了すること、を特徴とする。 Other embodiments of the present disclosure made to solve the above problems include a gas flow path through which gas flows, a sealing valve for opening and closing the gas flow path, and a control unit for controlling the opening and closing operation of the sealing valve. In the sealing valve control system comprising, the sealing valve is provided with a sealing member for sealing between the valve body and the valve seat on either the valve seat or the valve body, and the control thereof is provided. The unit is a fully closed holding control that acts in the direction of pressing the valve body against the valve seat after the sealing valve is fully closed, and a fully closed holding that acts in the direction of separating the valve body from the valve seat. It is characterized in that the release control is performed, the fully closed holding control is performed, and the control including the fully closed holding control and the fully closed holding release control is completed .

この態様によれば、封止弁を全閉状態にした後に、全閉保持制御と全閉保持解除制御とを行うことで、シール部材の捩れを解消（抑制）させることができる。これにより、封止弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。そのため、弁体または弁座とシール部材の間において、シール幅の確保と接地状態の安定化の両立を図ることができる。したがって、封止弁を全閉状態にしたときに、弁体または弁座とシール部材の間において、封止性が向上し、ガス洩れを防ぐことができる。 According to this aspect, the twist of the seal member can be eliminated (suppressed) by performing the fully closed holding control and the fully closed holding release control after the sealing valve is fully closed. As a result, the ground contact state between the valve body or the valve seat and the seal member in the fully closed state of the sealing valve is stabilized. Therefore, it is possible to secure the seal width and stabilize the ground contact state between the valve body or the valve seat and the seal member. Therefore, when the sealing valve is fully closed, the sealing property is improved between the valve body or the valve seat and the sealing member, and gas leakage can be prevented.

上記の態様においては、前記制御部は、前記全閉保持制御と前記全閉保持解除制御とを繰り返し行うこと、が好ましい。 In the above aspect, it is preferable that the control unit repeatedly performs the fully closed holding control and the fully closed holding release control.

この態様によれば、全閉保持制御と全閉保持解除制御とを繰り返し行うことで、より効果的に、シール部材の捩れを解消させることができる。これにより、より効果的に、封止弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。 According to this aspect, the twisting of the seal member can be more effectively eliminated by repeatedly performing the fully closed holding control and the fully closed holding release control. This more effectively stabilizes the ground contact state between the valve body or the valve seat and the seal member in the fully closed state of the sealing valve.

上記課題を解決するためになされた本開示の他の形態は、燃料電池と、前記燃料電池に酸化剤ガスを供給するための酸化剤ガス供給通路と、前記酸化剤ガス供給通路に設けられた上流側弁と、前記燃料電池に供給された酸化剤ガスを排出するための酸化剤ガス排出通路と、前記酸化剤ガス排出通路に設けられた下流側弁と、各種制御を行う制御部と、を有する燃料電池システムにおいて、前記上流側弁と前記下流側弁は、弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、前記制御部は、前記上流側弁または前記下流側弁による封止要求があるときに、前記弁座又は前記弁体と前記シール部材とを摺動させた状態で前記弁体の開弁方向の移動量よりも前記弁体の閉弁方向の移動量を大きくしながら前記弁体を開弁方向と閉弁方向へ移動させる開閉制御を行った後に、前記上流側弁または前記下流側弁を全閉状態にし、前記上流側弁における前記弁体の開弁方向または閉弁方向の移動量を、前記下流側弁における前記弁体の開弁方向または閉弁方向の移動量よりも小さくすること、を特徴とする。 Other embodiments of the present disclosure made to solve the above problems are provided in the fuel cell, the oxidant gas supply passage for supplying the oxidant gas to the fuel cell, and the oxidant gas supply passage. An upstream valve, an oxidant gas discharge passage for discharging the oxidant gas supplied to the fuel cell, a downstream valve provided in the oxidant gas discharge passage, and a control unit for performing various controls. In the fuel cell system having the above, the upstream side valve and the downstream side valve are provided with a sealing member for sealing between the valve body and the valve seat on either the valve seat or the valve body. When there is a sealing request from the upstream valve or the downstream valve, the control unit slides the valve seat or the valve body and the seal member in the valve opening direction of the valve body. After performing open / close control to move the valve body in the valve opening direction and the valve closing direction while making the movement amount of the valve body in the valve closing direction larger than the moving amount of the valve body, the upstream side valve or the downstream side valve is operated. In the fully closed state, the amount of movement of the valve body in the valve opening direction or the valve closing direction in the upstream side valve is smaller than the amount of movement of the valve body in the valve opening direction or the valve closing direction in the downstream side valve. , Is characterized.

この態様によれば、例えば乾燥状態になり易い上流側弁について、下流側弁よりも小刻みに開閉させながら徐々に閉弁させて全閉状態にすることができるので、シール部材の捩れを解消（抑制）させることができる。そのため、下流側弁と同様に上流側弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。したがって、上流側弁と下流側弁について、弁体または弁座とシール部材の間において、シール幅の確保と接地状態の安定化の両立を図ることができる。ゆえに、上流側弁と下流側弁を全閉状態にしたときに、弁体または弁座とシール部材の間において、封止性が向上し、ガス洩れを防ぐことができる。 According to this aspect, for example, the upstream side valve, which tends to be in a dry state, can be gradually closed while opening and closing in smaller steps than the downstream side valve, so that the sealing member can be completely closed (twisting of the seal member). Can be suppressed). Therefore, as with the downstream valve, the ground contact state between the valve body or the valve seat and the seal member in the fully closed state of the upstream valve is stable. Therefore, for the upstream valve and the downstream valve, it is possible to secure the seal width and stabilize the ground contact state between the valve body or the valve seat and the seal member. Therefore, when the upstream valve and the downstream valve are fully closed, the sealing property is improved between the valve body or the valve seat and the seal member, and gas leakage can be prevented.

上記の態様においては、前記制御部は、前記上流側弁にて前記弁体を開弁方向と閉弁方向へ移動させる開閉回数を、前記下流側弁にて前記弁体を開弁方向と閉弁方向へ移動させる開閉回数よりも多くすること、が好ましい。 In the above aspect, the control unit sets the number of times of opening and closing to move the valve body in the valve opening direction and the valve closing direction by the upstream side valve, and closes the valve body in the valve opening direction and the valve closing direction by the downstream side valve. It is preferable to increase the number of times of opening and closing to move in the valve direction.

この態様によれば、上流側弁について、下流側弁よりも多くの回数について弁体または弁座とシール部材を摺動させて全閉状態にすることができるので、より効果的に、下流側弁と同様に上流側弁についてもシール部材の捩れを解消させることができる。そのため、より効果的に、上流側弁と下流側弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。 According to this aspect, the upstream side valve can be fully closed by sliding the valve body or the valve seat and the seal member more times than the downstream side valve, so that the downstream side can be more effectively closed. As with the valve, the twist of the seal member can be eliminated for the upstream valve. Therefore, more effectively, the ground contact state of the valve body or the valve seat and the seal member in the fully closed state of the upstream side valve and the downstream side valve is stabilized.

上記課題を解決するためになされた本開示の他の形態は、燃料電池と、前記燃料電池に酸化剤ガスを供給するための酸化剤ガス供給通路と、前記酸化剤ガス供給通路に設けられた上流側弁と、前記燃料電池に供給された酸化剤ガスを排出するための酸化剤ガス排出通路と、前記酸化剤ガス排出通路に設けられた下流側弁と、各種制御を行う制御部と、を有する燃料電池システムにおいて、前記上流側弁と前記下流側弁は、弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、前記制御部は、前記上流側弁または前記下流側弁による封止要求があるときに、前記弁座又は前記弁体と前記シール部材とを摺動させた状態で前記弁体の開弁方向の移動量よりも前記弁体の閉弁方向の移動量を大きくしながら前記弁体を開弁方向と閉弁方向へ移動させる開閉制御を行った後に、前記上流側弁または前記下流側弁を全閉状態にし、前記上流側弁にて前記弁体を開弁方向と閉弁方向へ移動させる開閉回数を、前記下流側弁にて前記弁体を開弁方向と閉弁方向へ移動させる開閉回数よりも多くすること、を特徴とする。 Other embodiments of the present disclosure made to solve the above problems are provided in the fuel cell, the oxidant gas supply passage for supplying the oxidant gas to the fuel cell, and the oxidant gas supply passage. An upstream valve, an oxidant gas discharge passage for discharging the oxidant gas supplied to the fuel cell, a downstream valve provided in the oxidant gas discharge passage, and a control unit for performing various controls. In the fuel cell system having the above, the upstream side valve and the downstream side valve are provided with a sealing member for sealing between the valve body and the valve seat on either the valve seat or the valve body. When there is a sealing request from the upstream valve or the downstream valve, the control unit slides the valve seat or the valve body and the seal member in the valve opening direction of the valve body. After performing open / close control to move the valve body in the valve opening direction and the valve closing direction while making the movement amount of the valve body in the valve closing direction larger than the moving amount of the valve body, the upstream side valve or the downstream side valve is operated. The number of times the valve body is opened and closed by the upstream valve in the fully closed state and the valve body is moved in the valve opening direction and the valve closing direction, and the opening and closing times in which the valve body is moved in the valve opening direction and the valve closing direction by the downstream side valve. It is characterized by having more than the number of times.

この態様によれば、上流側弁について、下流側弁よりも多くの回数について弁体または弁座とシール部材を摺動させて全閉状態にすることができるので、下流側弁と同様に上流側弁についてもシール部材の捩れを解消させることができる。そのため、上流側弁と下流側弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。したがって、上流側弁と下流側弁について、弁体または弁座とシール部材の間において、シール幅の確保と接地状態の安定化の両立を図ることができる。ゆえに、上流側弁と下流側弁を全閉状態にしたときに、弁体または弁座とシール部材の間において、封止性が向上し、ガス洩れを防ぐことができる。 According to this aspect, the upstream valve can be fully closed by sliding the valve body or the valve seat and the seal member more times than the downstream valve, so that the upstream valve can be fully closed. The twist of the seal member can be eliminated for the side valve as well. Therefore, the ground contact state of the valve body or the valve seat and the seal member in the fully closed state of the upstream side valve and the downstream side valve is stable. Therefore, for the upstream valve and the downstream valve, it is possible to secure the seal width and stabilize the ground contact state between the valve body or the valve seat and the seal member. Therefore, when the upstream valve and the downstream valve are fully closed, the sealing property is improved between the valve body or the valve seat and the seal member, and gas leakage can be prevented.

上記課題を解決するためになされた本開示の他の形態は、燃料電池と、前記燃料電池に酸化剤ガスを供給するための酸化剤ガス供給通路と、前記酸化剤ガス供給通路に設けられた上流側弁と、前記燃料電池に供給された酸化剤ガスを排出するための酸化剤ガス排出通路と、前記酸化剤ガス排出通路に設けられた下流側弁と、各種制御を行う制御部と、を有する燃料電池システムにおいて、前記上流側弁と前記下流側弁は、弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、前記制御部は、前記上流側弁または前記下流側弁を全閉状態にした後に、前記弁体を前記弁座に押し付ける方向に作用させる全閉保持制御と、前記弁体を前記弁座から離す方向に作用させる全閉保持解除制御と、を行い、前記上流側弁にて前記全閉保持制御と前記全閉保持解除制御を行う回数を、前記下流側弁にて前記全閉保持制御と前記全閉保持解除制御を行う回数よりも多くすること、を特徴とする。 Other embodiments of the present disclosure made to solve the above problems are provided in the fuel cell, the oxidant gas supply passage for supplying the oxidant gas to the fuel cell, and the oxidant gas supply passage. An upstream valve, an oxidant gas discharge passage for discharging the oxidant gas supplied to the fuel cell, a downstream valve provided in the oxidant gas discharge passage, and a control unit for performing various controls. In the fuel cell system having the above, the upstream side valve and the downstream side valve are provided with a sealing member for sealing between the valve body and the valve seat on either the valve seat or the valve body. The control unit controls the fully closed holding control in which the upstream valve or the downstream valve is fully closed and then the valve body is pressed against the valve seat, and the valve body is moved from the valve seat to the valve seat. The fully closed holding / releasing control that acts in the direction of separation is performed, and the number of times that the fully closed holding control and the fully closed holding / releasing control are performed by the upstream side valve is referred to as the fully closed holding / releasing control by the downstream side valve. It is characterized in that the number of times the fully closed holding release control is performed is larger than the number of times.

この態様によれば、上流側弁について、下流側弁よりも多くの回数について弁体を弁座に押し付けたり弁体を弁座から離したりするので、下流側弁と同様に上流側弁についてもシール部材の捩れを解消させることができる。そのため、上流側弁と下流側弁の全閉状態における弁体または弁座とシール部材の接地状態が安定する。したがって、上流側弁と下流側弁について、弁体または弁座とシール部材の間において、シール幅の確保と接地状態の安定化の両立を図ることができる。ゆえに、上流側弁と下流側弁を全閉状態にしたときに、弁体または弁座とシール部材の間において、封止性が向上し、ガス洩れを防ぐことができる。 According to this aspect, since the valve body is pressed against the valve seat and the valve body is separated from the valve seat more times than the downstream side valve for the upstream side valve, the upstream side valve is also used as well as the downstream side valve. The twist of the seal member can be eliminated. Therefore, the ground contact state of the valve body or the valve seat and the seal member in the fully closed state of the upstream side valve and the downstream side valve is stable. Therefore, for the upstream valve and the downstream valve, it is possible to secure the seal width and stabilize the ground contact state between the valve body or the valve seat and the seal member. Therefore, when the upstream valve and the downstream valve are fully closed, the sealing property is improved between the valve body or the valve seat and the seal member, and gas leakage can be prevented.

本開示の封止弁制御システムおよび燃料電池システムによれば、全閉状態の封止弁においてガス洩れを防ぐことができる。 According to the sealing valve control system and the fuel cell system of the present disclosure, gas leakage can be prevented in the sealing valve in the fully closed state.

実施形態に係る燃料電池システムの概略構成図である。It is a schematic block diagram of the fuel cell system which concerns on embodiment. 二重偏心弁を備えた電動式の流量制御弁の斜視図である。It is a perspective view of the electric flow rate control valve provided with a double eccentric valve. 全閉状態における弁部を一部破断して示す斜視図である。It is a perspective view which shows the valve part partially broken in the fully closed state. 全開状態における弁部を一部破断して示す斜視図である。It is a perspective view which shows that the valve part in a fully opened state is partially broken. 全閉状態の弁座、弁体及び回転軸を示す側面図である。It is a side view which shows the valve seat, the valve body and the axis of rotation in a fully closed state. 図５のＡ－Ａ線断面図である。FIG. 5 is a cross-sectional view taken along the line AA of FIG. 第１実施形態における入口封止弁の制御フローチャートを示す図である。It is a figure which shows the control flowchart of the inlet sealing valve in 1st Embodiment. 第１実施形態における出口統合弁の制御フローチャートを示す図である。It is a figure which shows the control flowchart of the outlet integrated valve in 1st Embodiment. 第１実施形態における制御タイムチャートの一例を示す図である。It is a figure which shows an example of the control time chart in 1st Embodiment. 第１実施形態において、全閉状態における弁体と弁座のゴムシール部との接地状態が安定することを示す図である。In the first embodiment, it is a figure which shows that the ground contact state of a valve body and a rubber seal part of a valve seat in a fully closed state is stable. 第２実施形態における入口封止弁の制御フローチャートを示す図である。It is a figure which shows the control flowchart of the inlet sealing valve in 2nd Embodiment. 第２実施形態における入口封止弁の制御タイムチャートの一例を示す図である。It is a figure which shows an example of the control time chart of the inlet sealing valve in 2nd Embodiment. 第２実施形態において、全閉状態における弁体と弁座のゴムシール部との接地状態が安定することを示す図である。In the second embodiment, it is a figure which shows that the ground contact state of a valve body and a rubber seal part of a valve seat in a fully closed state is stable. 第２実施形態における出口統合弁の制御フローチャートを示す図である。It is a figure which shows the control flowchart of the outlet integrated valve in 2nd Embodiment. 第２実施形態における出口統合弁の制御タイムチャートの一例を示す図である。It is a figure which shows an example of the control time chart of the outlet integrated valve in 2nd Embodiment. 第３実施形態における入口封止弁の制御フローチャートを示す図である。It is a figure which shows the control flowchart of the inlet sealing valve in 3rd Embodiment. 第３実施形態における入口封止弁の制御タイムチャートの一例を示す図である。It is a figure which shows an example of the control time chart of the inlet sealing valve in 3rd Embodiment. 第３実施形態における出口統合弁の制御フローチャートを示す図である。It is a figure which shows the control flowchart of the outlet integrated valve in 3rd Embodiment. 第３実施形態における出口統合弁の制御タイムチャートの一例を示す図である。It is a figure which shows an example of the control time chart of the outlet integrated valve in 3rd Embodiment. 全閉状態における弁体と弁座のゴムシール部との接地状態が不安定になる課題を示す図である。It is a figure which shows the problem that the ground contact state between a valve body and a rubber seal part of a valve seat becomes unstable in a fully closed state.

本開示の封止弁制御システムおよび燃料電池システムの実施形態について、図面を参照しながら詳細に説明する。 The embodiments of the sealing valve control system and the fuel cell system of the present disclosure will be described in detail with reference to the drawings.

＜第１実施形態＞
本開示に係る実施形態である燃料電池システムについて、図１を参照しながら詳細に説明する。本実施形態では、燃料電池車に搭載され、その駆動用モータ（図示略）に電力を供給する燃料電池システムに、本開示を適用した場合について説明する。 <First Embodiment>
The fuel cell system according to the embodiment of the present disclosure will be described in detail with reference to FIG. In the present embodiment, a case where the present disclosure is applied to a fuel cell system mounted on a fuel cell vehicle and supplying electric power to a drive motor (not shown) thereof will be described.

本実施形態の燃料電池システム１０１は、図１に示すように、燃料電池スタック（燃料電池）１１１と、水素系１１２と、エア系１１３を有する。 As shown in FIG. 1, the fuel cell system 101 of the present embodiment has a fuel cell stack (fuel cell) 111, a hydrogen system 112, and an air system 113.

燃料電池スタック１１１は、燃料ガスの供給と酸化剤ガスの供給を受けて発電を行う。本実施形態では、燃料ガスは水素ガスであり、酸化剤ガスはエアである。すなわち、燃料電池スタック１１１は、水素系１１２からの水素ガスの供給と、エア系１１３からのエアの供給を受けて発電を行う。そして、燃料電池スタック１１１で発電された電力は、インバータ（図示略）を介して駆動用モータ（図示略）に供給される。 The fuel cell stack 111 generates electricity by receiving the supply of the fuel gas and the supply of the oxidant gas. In this embodiment, the fuel gas is hydrogen gas and the oxidant gas is air. That is, the fuel cell stack 111 generates electricity by receiving the supply of hydrogen gas from the hydrogen system 112 and the supply of air from the air system 113. Then, the electric power generated by the fuel cell stack 111 is supplied to the drive motor (not shown) via the inverter (not shown).

水素系１１２は、燃料電池スタック１１１のアノード側に設けられている。この水素系１１２は、水素供給通路１２１、水素排出通路１２２、充填通路１２３を備えている。水素供給通路１２１は、水素タンク１３１から燃料電池スタック１１１へ水素ガスを供給するための通路である。水素排出通路１２２は、燃料電池スタック１１１から排出される水素ガス（以下、適宜、「水素オフガス」という。）を排出するための通路である。充填通路１２３は、充填口１５１から水素タンク１３１に水素ガスを充填するための通路である。 The hydrogen system 112 is provided on the anode side of the fuel cell stack 111. The hydrogen system 112 includes a hydrogen supply passage 121, a hydrogen discharge passage 122, and a filling passage 123. The hydrogen supply passage 121 is a passage for supplying hydrogen gas from the hydrogen tank 131 to the fuel cell stack 111. The hydrogen discharge passage 122 is a passage for discharging hydrogen gas (hereinafter, appropriately referred to as “hydrogen off gas”) discharged from the fuel cell stack 111. The filling passage 123 is a passage for filling the hydrogen tank 131 with hydrogen gas from the filling port 151.

水素系１１２は、水素供給通路１２１において、水素タンク１３１側から順に、主止弁１３２、高圧レギュレータ１３３、中圧リリーフ弁１３４、圧力センサ１３５、インジェクタ部（燃料ガス供給部）１３６、低圧リリーフ弁１３７、圧力センサ１３８を備えている。主止弁１３２は、水素タンク１３１から水素供給通路１２１への水素ガスの供給と遮
断を切り換える弁である。高圧レギュレータ１３３は、水素ガスを減圧するための圧力調整弁である。中圧リリーフ弁１３４は、水素供給通路１２１における高圧レギュレータ１３３とインジェクタ部１３６の間の圧力が所定圧力以上になると開弁して圧力を所定圧力未満に調整する弁である。圧力センサ１３５は、水素供給通路１２１における高圧レギュレータ１３３とインジェクタ部１３６の間の圧力を検出するセンサである。インジェクタ部１３６は、水素ガスの流量を調節する機構である。低圧リリーフ弁１３７は、水素供給通路１２１におけるインジェクタ部１３６と燃料電池スタック１１１の間の圧力が所定圧力以上になると開弁して圧力を所定圧力未満に調整する弁である。圧力センサ１３８は、水素供給通路１２１におけるインジェクタ部１３６と燃料電池スタック１１１の間の圧力を検出するセンサである。 In the hydrogen supply passage 121, the hydrogen system 112 includes a main stop valve 132, a high pressure regulator 133, a medium pressure relief valve 134, a pressure sensor 135, an injector section (fuel gas supply section) 136, and a low pressure relief valve in this order from the hydrogen tank 131 side. It is equipped with 137 and a pressure sensor 138. The main check valve 132 is a valve that switches between supplying and shutting off hydrogen gas from the hydrogen tank 131 to the hydrogen supply passage 121. The high pressure regulator 133 is a pressure regulating valve for reducing the pressure of hydrogen gas. The medium pressure relief valve 134 is a valve that opens when the pressure between the high pressure regulator 133 and the injector portion 136 in the hydrogen supply passage 121 becomes equal to or higher than a predetermined pressure to adjust the pressure to less than a predetermined pressure. The pressure sensor 135 is a sensor that detects the pressure between the high pressure regulator 133 and the injector unit 136 in the hydrogen supply passage 121. The injector unit 136 is a mechanism for adjusting the flow rate of hydrogen gas. The low pressure relief valve 137 is a valve that opens when the pressure between the injector portion 136 and the fuel cell stack 111 in the hydrogen supply passage 121 becomes equal to or higher than a predetermined pressure to adjust the pressure to less than a predetermined pressure. The pressure sensor 138 is a sensor that detects the pressure between the injector unit 136 and the fuel cell stack 111 in the hydrogen supply passage 121.

また、水素系１１２は、水素排出通路１２２において、燃料電池スタック１１１側から順に、気液分離器１４１、排気排水弁１４２が配置されている。気液分離器１４１は、水素オフガス内の水分を分離する機器である。排気排水弁１４２は、気液分離器１４１からエア系１１３の希釈器１８２への水素オフガスや水分の排出と遮断を切り換える弁である。 Further, in the hydrogen system 112, the gas-liquid separator 141 and the exhaust drain valve 142 are arranged in order from the fuel cell stack 111 side in the hydrogen discharge passage 122. The gas-liquid separator 141 is a device that separates the water content in the hydrogen off-gas. The exhaust drain valve 142 is a valve that switches between discharging and shutting off hydrogen off gas and water from the gas-liquid separator 141 to the diluter 182 of the air system 113.

エア系１１３は、燃料電池スタック１１１のカソード側に設けられている。このエア系１１３は、エア供給通路１６１、エア排出通路１６２、バイパス通路１６３を備えている。エア供給通路１６１は、エアが流れる流路であり、燃料電池システム１０１の外部から燃料電池スタック１１１へ、エアを供給するための通路である。エア排出通路１６２は、エアが流れる流路であり、燃料電池スタック１１１から排出されるエア（以下、適宜、「エアオフガス」という。）を排出するための通路である。バイパス通路１６３は、エア供給通路１６１から燃料電池スタック１１１を介さずにエア排出通路１６２へ、エアを流すための通路である。 The air system 113 is provided on the cathode side of the fuel cell stack 111. The air system 113 includes an air supply passage 161, an air discharge passage 162, and a bypass passage 163. The air supply passage 161 is a flow path through which air flows, and is a passage for supplying air from the outside of the fuel cell system 101 to the fuel cell stack 111. The air discharge passage 162 is a passage through which air flows, and is a passage for discharging the air discharged from the fuel cell stack 111 (hereinafter, appropriately referred to as “air-off gas”). The bypass passage 163 is a passage for flowing air from the air supply passage 161 to the air discharge passage 162 without passing through the fuel cell stack 111.

エア系１１３は、エア供給通路１６１において、エアクリーナ１７１側から順に、コンプレッサ１７２、インタークーラ１７３、入口封止弁（上流側弁）１７４を備えている。エアクリーナ１７１は、燃料電池システム１０１の外部から取り込んだエアを清浄化する機器である。コンプレッサ１７２は、エアを燃料電池スタック１１１に供給する機器である。インタークーラ１７３は、エアを冷却する機器である。入口封止弁１７４は、エア供給通路１６１を開閉する封止弁であり、燃料電池スタック１１１へのエアの供給と遮断を切り換える弁である。 The air system 113 includes a compressor 172, an intercooler 173, and an inlet sealing valve (upstream side valve) 174 in order from the air cleaner 171 side in the air supply passage 161. The air cleaner 171 is a device that purifies the air taken in from the outside of the fuel cell system 101. The compressor 172 is a device that supplies air to the fuel cell stack 111. The intercooler 173 is a device for cooling air. The inlet sealing valve 174 is a sealing valve that opens and closes the air supply passage 161 and switches between supplying and shutting off air to the fuel cell stack 111.

また、エア系１１３は、エア排出通路１６２において、燃料電池スタック１１１側から順に、出口統合弁（下流側弁）１８１、希釈器１８２が配置されている。 Further, in the air system 113, an outlet integrated valve (downstream side valve) 181 and a diluter 182 are arranged in order from the fuel cell stack 111 side in the air discharge passage 162.

出口統合弁１８１は、エア排出通路１６２を開閉する封止弁であり、燃料電池スタック１１１からのエアオフガスの排出と遮断を切り換える弁（封止機能を有する弁）である。また、出口統合弁１８１は、燃料電池スタック１１１の背圧を調整して燃料電池スタック１１１からのエアオフガスの排出量を制御する弁（調圧（流量制御）機能を有する弁）である。 The outlet integrated valve 181 is a sealing valve that opens and closes the air discharge passage 162, and is a valve (a valve having a sealing function) that switches between discharging and shutting off the air-off gas from the fuel cell stack 111. Further, the outlet integrated valve 181 is a valve (a valve having a pressure regulation (flow control) function) that adjusts the back pressure of the fuel cell stack 111 to control the amount of air-off gas discharged from the fuel cell stack 111.

希釈器１８２は、エアオフガス及びバイパス通路１６３を流れるエアにより、水素排出通路１２２から排出される水素オフガスを希釈する機器である。 The diluter 182 is a device that dilutes the hydrogen off gas discharged from the hydrogen discharge passage 122 by the air off gas and the air flowing through the bypass passage 163.

また、エア系１１３は、バイパス通路１６３において、バイパス弁１９１を備えている。バイパス弁１９１は、バイパス通路１６３におけるエアの流量を制御する弁である。 Further, the air system 113 includes a bypass valve 191 in the bypass passage 163. The bypass valve 191 is a valve that controls the flow rate of air in the bypass passage 163.

また、燃料電池システム１０１は、システムの制御を司るコントローラ（制御部）２０１を備えている。コントローラ２０１は、燃料電池システム１０１に備わる各機器を制御するとともに各種判定を行う。本実施形態では、コントローラ２０１は、入口封止弁１７４および出口統合弁１８１の開閉動作も制御する。なお、燃料電池システム１０１は、その他、燃料電池スタック１１１の冷却を行う冷却系（不図示）も有する。なお、本実施形態では、コントローラ２０１は、例えばＥＣＵである。 Further, the fuel cell system 101 includes a controller (control unit) 201 that controls the system. The controller 201 controls each device provided in the fuel cell system 101 and makes various determinations. In this embodiment, the controller 201 also controls the opening / closing operation of the inlet sealing valve 174 and the outlet integrated valve 181. The fuel cell system 101 also has a cooling system (not shown) for cooling the fuel cell stack 111. In this embodiment, the controller 201 is, for example, an ECU.

以上のような構成の燃料電池システム１０１において、水素供給通路１２１から燃料電池スタック１１１に供給された水素ガスは、燃料電池スタック１１１にて発電に使用される。その後、水素ガスは、燃料電池スタック１１１から水素オフガスとして水素排出通路１２２と希釈器１８２を介して、燃料電池システム１０１の外部に排出される。また、エア供給通路１６１から燃料電池スタック１１１に供給されたエアは、燃料電池スタック１１１にて発電に使用された後、燃料電池スタック１１１からエアオフガスとしてエア排出通路１６２と希釈器１８２を介して、燃料電池システム１０１の外部に排出される。 In the fuel cell system 101 having the above configuration, the hydrogen gas supplied to the fuel cell stack 111 from the hydrogen supply passage 121 is used for power generation in the fuel cell stack 111. After that, the hydrogen gas is discharged from the fuel cell stack 111 as hydrogen off gas to the outside of the fuel cell system 101 via the hydrogen discharge passage 122 and the diluter 182. Further, the air supplied from the air supply passage 161 to the fuel cell stack 111 is used for power generation in the fuel cell stack 111, and then is used as air-off gas from the fuel cell stack 111 via the air discharge passage 162 and the diluter 182. It is discharged to the outside of the fuel cell system 101.

なお、本実施形態では、エア供給通路１６１およびエア排出通路１６２と、入口封止弁１７４および出口統合弁１８１と、コントローラ２０１とによって封止弁制御システムが構成されている。 In the present embodiment, the sealing valve control system is configured by the air supply passage 161 and the air discharge passage 162, the inlet sealing valve 174, the outlet integrated valve 181 and the controller 201.

図２に、二重偏心弁を備えた電動式の流量制御弁１（「封止弁」の一例）を斜視図により示す。本実施形態では、前記の入口封止弁１７４および出口統合弁１８１として、この流量制御弁１を採用している。なお、前記のバイパス弁１９１についても、流量制御弁１を採用してもよい。 FIG. 2 is a perspective view showing an electric flow rate control valve 1 (an example of a “sealing valve”) provided with a double eccentric valve. In the present embodiment, the flow rate control valve 1 is adopted as the inlet sealing valve 174 and the outlet integrated valve 181. The flow rate control valve 1 may also be used for the bypass valve 191.

流量制御弁１は、二重偏心弁より構成される弁部２と、モータを内蔵したモータ部３と、複数のギヤを内蔵した減速機構部４とを備える。弁部２は、内部に流体が流れる流路１１を有する金属製の管部１２を含み、流路１１の中には弁座１３、弁体１４及び回転軸１５が配置される。流路１１の内形、弁座１３の外形、弁体１４の外形は、それぞれ平面視で円形又はほぼ円形をなしている。回転軸１５には、モータの回転力が複数のギヤを介して伝えられるようになっている。この実施形態で、流路１１を有する管部１２は、ハウジング６の一部に相当し、モータ部３のモータや減速機構部４の複数のギヤは、このハウジング６により覆われる。ハウジング６は、アルミ等の金属により形成される。 The flow rate control valve 1 includes a valve portion 2 composed of a double eccentric valve, a motor portion 3 having a built-in motor, and a reduction mechanism portion 4 having a plurality of gears built-in. The valve portion 2 includes a metal pipe portion 12 having a flow path 11 through which a fluid flows, and a valve seat 13, a valve body 14, and a rotating shaft 15 are arranged in the flow path 11. The inner shape of the flow path 11, the outer shape of the valve seat 13, and the outer shape of the valve body 14 are circular or substantially circular in a plan view, respectively. The rotational force of the motor is transmitted to the rotating shaft 15 via a plurality of gears. In this embodiment, the pipe portion 12 having the flow path 11 corresponds to a part of the housing 6, and the motor of the motor portion 3 and the plurality of gears of the reduction mechanism portion 4 are covered by the housing 6. The housing 6 is made of a metal such as aluminum.

図３と図４に示すように、流路１１には段部１０が形成され、その段部１０に弁座１３が組み込まれる。弁座１３は、円環状をなし、中央に円形又はほぼ円形の弁孔１６を有する。弁孔１６の縁部には環状のシート面１７が形成される。本実施形態では、弁座１３に、弁座１３と弁体１４との間を封止するためのゴムシール部１３ａ（「シール部材」の一例）が設けられており、このゴムシール部１３ａにシート面１７が形成されている。弁体１４は、円板状をなし、その外周には、シート面１７に対応する環状のシール面１８が形成される。弁体１４は回転軸１５に固定され、回転軸１５と一体的に回動するようになっている。 As shown in FIGS. 3 and 4, a step portion 10 is formed in the flow path 11, and a valve seat 13 is incorporated in the step portion 10. The valve seat 13 has an annular shape and has a circular or substantially circular valve hole 16 in the center. An annular seat surface 17 is formed at the edge of the valve hole 16. In the present embodiment, the valve seat 13 is provided with a rubber seal portion 13a (an example of a “seal member”) for sealing between the valve seat 13 and the valve body 14, and the rubber seal portion 13a has a seat surface. 17 is formed. The valve body 14 has a disk shape, and an annular sealing surface 18 corresponding to the seat surface 17 is formed on the outer periphery thereof. The valve body 14 is fixed to the rotating shaft 15 and rotates integrally with the rotating shaft 15.

図３～図６に示すように、回転軸１５の軸線Ｌ１は、弁体１４及び弁孔１６の径方向と平行に伸び、弁孔１６の中心Ｐ１から弁孔１６の径方向へ偏心して配置されると共に、弁体１４のシール面１８が回転軸１５の軸線Ｌ１から弁体１４の軸線Ｌ２が伸びる方向へ偏心して配置される。また、弁体１４を回転軸１５の軸線Ｌ１を中心に回動させることにより、弁体１４のシール面１８が、弁座１３のシート面１７に面接触する全閉位置（図３参照）とシート面１７から最も離れる全開位置（図４参照）との間で移動可能に構成される。 As shown in FIGS. 3 to 6, the axis L1 of the rotating shaft 15 extends in parallel with the radial direction of the valve body 14 and the valve hole 16, and is arranged eccentrically from the center P1 of the valve hole 16 in the radial direction of the valve hole 16. At the same time, the sealing surface 18 of the valve body 14 is arranged eccentrically in the direction in which the axis L2 of the valve body 14 extends from the axis L1 of the rotating shaft 15. Further, by rotating the valve body 14 around the axis L1 of the rotating shaft 15, the sealing surface 18 of the valve body 14 comes into surface contact with the seat surface 17 of the valve seat 13 (see FIG. 3). It is configured to be movable from the fully open position (see FIG. 4) farthest from the seat surface 17.

この実施形態では、図６において、全閉位置から弁体１４が開弁方向（図６に示す矢印Ｆ１の方向、すなわち図６において時計方向）へ回動し始めると同時に、弁体１４のシール面１８が弁座１３のシート面１７から離れ始めると共に回転軸１５の軸線Ｌ１を中心とする回動軌跡Ｔ１，Ｔ２に沿って移動し始めるようになっている。 In this embodiment, in FIG. 6, the valve body 14 starts to rotate in the valve opening direction (direction of arrow F1 shown in FIG. 6, that is, clockwise in FIG. 6) from the fully closed position, and at the same time, the valve body 14 is sealed. The surface 18 starts to move away from the seat surface 17 of the valve seat 13 and starts to move along the rotation loci T1 and T2 about the axis L1 of the rotation shaft 15.

図５と図６に示すように、弁体１４は、その上側の板面１４ａから突出し回転軸１５に固定される山形状の固定部１４ｂを含む。この固定部１４ｂは回転軸１５の軸線Ｌ１から回転軸１５の径方向へずれた位置にて、回転軸１５の先端から突出するピン１５ａを介して回転軸１５に固定される。また、図６に示すように、固定部１４ｂは、弁体１４の軸線Ｌ２上に配置され、固定部１４ｂを含む弁体１４が、弁体１４の軸線Ｌ２を中心に左右対称形状をなすように形成される。 As shown in FIGS. 5 and 6, the valve body 14 includes a mountain-shaped fixing portion 14b that protrudes from the upper plate surface 14a and is fixed to the rotation shaft 15. The fixing portion 14b is fixed to the rotating shaft 15 via a pin 15a protruding from the tip of the rotating shaft 15 at a position deviated from the axis L1 of the rotating shaft 15 in the radial direction of the rotating shaft 15. Further, as shown in FIG. 6, the fixing portion 14b is arranged on the axis L2 of the valve body 14, so that the valve body 14 including the fixing portion 14b has a symmetrical shape about the axis L2 of the valve body 14. Is formed in.

図１に示すエア系１１３において、燃料電池スタック１１１の上流には、コンプレッサ１７２等、洗浄しても完全に異物を除去出来ない部品が存在する。そのため、微少な異物（数百μｍの大きさの異物）が、入口封止弁１７４や出口統合弁１８１における弁座１３と弁体１４の間に噛み込む可能性がある。したがって、入口封止弁１７４や出口統合弁１８１に異物が噛み込まれても弁体１４が全閉位置にある全閉状態においてエアの洩れをゼロに維持するためには、弁座１３のゴムシール部１３ａと弁体１４が接触する部分の幅であるシール幅を異物の大きさ（数百μｍ）以上確保する必要がある。すると、必然的に、ゴムシール部１３ａと弁体１４の摺動範囲（摺動抵抗）が大きくなって、図２０に示すように、ゴムシール部１３ａが捩れて、これに伴い、全閉状態におけるゴムシール部１３ａの変位量は大きくなる。そのため、全閉状態におけるゴムシール部１３ａと弁体１４の接地状態が不安定になる。したがって、全閉状態において、ゴムシール部１３ａと弁体１４の接地不良により、エア洩れ（ガス洩れ）が発生し易くなる。 In the air system 113 shown in FIG. 1, upstream of the fuel cell stack 111, there is a component such as a compressor 172 that cannot completely remove foreign matter even if it is washed. Therefore, a minute foreign substance (foreign substance having a size of several hundred μm) may get caught between the valve seat 13 and the valve body 14 in the inlet sealing valve 174 and the outlet integrated valve 181. Therefore, in order to maintain zero air leakage in the fully closed state where the valve body 14 is in the fully closed position even if a foreign substance is caught in the inlet sealing valve 174 or the outlet integrated valve 181, the rubber seal of the valve seat 13 is used. It is necessary to secure the seal width, which is the width of the portion where the portion 13a and the valve body 14 are in contact with each other, at least the size of the foreign matter (several hundred μm). Then, inevitably, the sliding range (sliding resistance) between the rubber seal portion 13a and the valve body 14 becomes large, and as shown in FIG. 20, the rubber seal portion 13a is twisted, and the rubber seal in the fully closed state is accompanied by this. The amount of displacement of the portion 13a becomes large. Therefore, the ground contact state between the rubber seal portion 13a and the valve body 14 in the fully closed state becomes unstable. Therefore, in the fully closed state, air leakage (gas leakage) is likely to occur due to poor grounding between the rubber seal portion 13a and the valve body 14.

そこで、本実施形態では、このような全閉状態におけるエア洩れを防ぐために、開弁状態の入口封止弁１７４が閉弁する時に、コントローラ２０１は、図７に示す制御フローチャートに基づく制御を実行する。 Therefore, in the present embodiment, in order to prevent air leakage in such a fully closed state, the controller 201 executes control based on the control flowchart shown in FIG. 7 when the inlet sealing valve 174 in the valve open state is closed. do.

まず、図７に示すように、入口封止弁１７４による封止要求の有無を判断する（ステップＳ１）。そして、入口封止弁１７４による封止要求が有る場合（ステップＳ１：ＹＥＳ）には、入口封止弁１７４の開度ｔａ＿ｉｎを取り込む（ステップＳ２）。開度ｔａ＿ｉｎは、入口封止弁１７４の実開度（現在の開度）であり、例えば、入口封止弁１７４に設けられた開度センサ（不図示）により検出される。 First, as shown in FIG. 7, it is determined whether or not there is a sealing request by the inlet sealing valve 174 (step S1). Then, when there is a sealing request by the inlet sealing valve 174 (step S1: YES), the opening degree ta_in of the inlet sealing valve 174 is taken in (step S2). The opening degree ta_in is an actual opening degree (current opening degree) of the inlet sealing valve 174, and is detected by, for example, an opening degree sensor (not shown) provided in the inlet sealing valve 174.

次に、開度ｔａ＿ｉｎが所定開度αよりも小さいか否かを判断する（ステップＳ３）。ここで、所定開度αは、弁体１４と弁座１３のゴムシール部１３ａとが接触する（摺動する）開度であり、例えば、８°である。 Next, it is determined whether or not the opening degree ta_in is smaller than the predetermined opening degree α (step S3). Here, the predetermined opening degree α is an opening degree at which the valve body 14 and the rubber seal portion 13a of the valve seat 13 come into contact with (slide), and is, for example, 8 °.

そして、開度ｔａ＿ｉｎが所定開度αよりも小さい場合（ステップＳ３：ＹＥＳ）には、後述する開閉繰り返し制御を行うため、開閉繰り返し制御の開始時の入口封止弁１７４の開度として、現在の開度ｔａ＿ｉｎを開度ＴＡ＿ＩＮ（ｉ）として記憶する（ステップＳ５）。 When the opening ta_in is smaller than the predetermined opening α (step S3: YES), the opening / closing repeat control described later is performed, so that the opening of the inlet sealing valve 174 at the start of the opening / closing repetition control is currently set. The opening degree ta_in of is stored as the opening degree TA_IN (i) (step S5).

一方、開度ｔａ＿ｉｎが所定開度α以上である場合（ステップＳ３：ＮＯ）には、開度ｔａ＿ｉｎが所定開度αよりも小さくなるまで、入口封止弁１７４を閉弁する制御を実施した（ステップＳ４）後、開度ＴＡ＿ＩＮ（ｉ）を記憶する（ステップＳ５）。 On the other hand, when the opening ta_in is equal to or greater than the predetermined opening α (step S3: NO), control is performed to close the inlet sealing valve 174 until the opening ta_in becomes smaller than the predetermined opening α. After (step S4), the opening degree TA_IN (i) is stored (step S5).

次に、開閉繰り返し制御として、まず、入口封止弁１７４の開弁制御を実施する（ステップＳ６）ことにより、弁体１４とゴムシール部１３ａとを摺動させながら弁体１４を開弁方向へ移動させる。そして、開度ｔａ＿ｉｎを取り込み（ステップＳ７）、開度ｔａ＿ｉｎが開度（ＴＡ＿ＩＮ（ｉ）＋Ａ）よりも大きいか否かを判断する（ステップＳ８）。そして、開度ｔａ＿ｉｎが開度（ＴＡ＿ＩＮ（ｉ）＋Ａ）よりも大きくなる（ステップＳ８：ＹＥＳ）まで、入口封止弁１７４の開弁制御を実施して（ステップＳ６）、開度ｔａ＿ｉｎを取り込む（ステップＳ７）。ここで、開度変化量Ａは、入口封止弁１７４における弁体１４の開弁方向の移動量であり、すなわち、入口封止弁１７４の開弁制御を実施して弁体１４を開弁方向へ移動させるときの開度変化量（上流側弁の開弁時の開度変化量）である。そして、開度（ＴＡ＿ＩＮ（ｉ）＋Ａ）は、入口封止弁１７４の開弁制御を実施して弁体１４を開弁方向へ移動させるときの目標開度である。なお、開度変化量Ａは、例えば、２°である。 Next, as the opening / closing repetition control, first, the valve opening control of the inlet sealing valve 174 is performed (step S6), so that the valve body 14 is opened in the valve opening direction while sliding the valve body 14 and the rubber seal portion 13a. Move. Then, the opening ta_in is taken in (step S7), and it is determined whether or not the opening ta_in is larger than the opening (TA_IN (i) + A) (step S8). Then, valve opening control of the inlet sealing valve 174 is performed (step S6) until the opening ta_in becomes larger than the opening (TA_IN (i) + A) (step S8: YES), and the opening ta_in is taken in. (Step S7). Here, the opening change amount A is the amount of movement of the valve body 14 in the inlet sealing valve 174 in the valve opening direction, that is, the valve opening control of the inlet sealing valve 174 is performed to open the valve body 14. The amount of change in opening when moving in the direction (the amount of change in opening when the upstream valve is opened). The opening degree (TA_IN (i) + A) is a target opening degree when the valve opening control of the inlet sealing valve 174 is performed to move the valve body 14 in the valve opening direction. The opening degree change amount A is, for example, 2 °.

そして、開度ｔａ＿ｉｎが開度（ＴＡ＿ＩＮ（ｉ）＋Ａ）よりも大きくなったら（ステップＳ８：ＹＥＳ）、入口封止弁１７４の閉弁制御を実施する（ステップＳ９）ことにより、弁体１４とゴムシール部１３ａとを摺動させながら弁体１４を閉弁方向へ移動させる。このようにして、弁体１４を開度変化量Ａ分の開度幅について開弁方向へ移動させたら、弁体１４を閉弁方向へ移動させる。 Then, when the opening degree ta_in becomes larger than the opening degree (TA_IN (i) + A) (step S8: YES), the valve closing control of the inlet sealing valve 174 is performed (step S9) to obtain the valve body 14. The valve body 14 is moved in the valve closing direction while sliding with the rubber seal portion 13a. In this way, when the valve body 14 is moved in the valve opening direction with respect to the opening width corresponding to the opening change amount A, the valve body 14 is moved in the valve closing direction.

また、このとき、以下の数式に示すように、開度ＴＡ＿ＩＮ（ｉ）を更新する（ステップＳ１０）。ここで、開度変化量Ｂは、入口封止弁１７４における弁体１４の閉弁方向の移動量であり、すなわち、入口封止弁１７４の閉弁制御を実施して弁体１４を閉弁方向へ移動させるときの開度変化量（上流側弁の閉弁時の開度変化量）である。そして、開度（ＴＡ＿ＩＮ（ｉ－１）－Ｂ）は、入口封止弁１７４の閉弁制御を実施して弁体１４を閉弁方向へ移動させるときの目標開度である。なお、開度変化量Ｂは、開度変化量Ａよりも大きく、例えば、３°である。
［数１］
ＴＡ＿ＩＮ（ｉ）←ＴＡ＿ＩＮ（ｉ－１）－Ｂ Further, at this time, the opening degree TA_IN (i) is updated as shown in the following mathematical formula (step S10). Here, the opening change amount B is the amount of movement of the valve body 14 in the inlet sealing valve 174 in the valve closing direction, that is, the valve closing control of the inlet sealing valve 174 is performed to close the valve body 14. The amount of change in opening when moving in the direction (the amount of change in opening when the upstream valve is closed). The opening degree (TA_IN (i-1) -B) is a target opening degree when the valve closing control of the inlet sealing valve 174 is performed to move the valve body 14 in the valve closing direction. The opening change amount B is larger than the opening change amount A, for example, 3 °.
[Number 1]
TA_IN (i) ← TA_IN (i-1) -B

次に、開度ＴＡ＿ＩＮ（ｉ）が０°以上であるか否かを判断する（ステップＳ１１）。すなわち、開度ＴＡ＿ＩＮ（ｉ）が、入口封止弁１７４の全閉状態における開度よりも大きい否かを判断する。さらに言い換えると、入口封止弁１７４が全閉状態になったか否かを判断する。 Next, it is determined whether or not the opening degree TA_IN (i) is 0 ° or more (step S11). That is, it is determined whether or not the opening degree TA_IN (i) is larger than the opening degree of the inlet sealing valve 174 in the fully closed state. In other words, it is determined whether or not the inlet sealing valve 174 is fully closed.

そして、開度ＴＡ＿ＩＮ（ｉ）が０°以上である場合（ステップＳ１１：ＹＥＳ）には、開閉繰り返し制御を継続させる。そこで、開度ｔａ＿ｉｎを取り込み（ステップＳ１２）、開度ｔａ＿ｉｎが開度ＴＡ＿ＩＮ（ｉ）よりも小さくなったら（ステップＳ１３：ＹＥＳ）、ステップＳ６の処理に戻って、入口封止弁１７４を開弁する。このようにして、弁体１４を開度変化量Ｂ分の開度幅について閉弁方向へ移動させたら、弁体１４を開弁方向へ移動させる。 Then, when the opening degree TA_IN (i) is 0 ° or more (step S11: YES), the opening / closing repetition control is continued. Therefore, when the opening ta_in is taken in (step S12) and the opening ta_in becomes smaller than the opening TA_IN (i) (step S13: YES), the process returns to step S6 and the inlet sealing valve 174 is opened. do. In this way, when the valve body 14 is moved in the valve closing direction with respect to the opening width corresponding to the opening change amount B, the valve body 14 is moved in the valve opening direction.

このようにして、本実施形態では、入口封止弁１７４による封止要求があり入口封止弁１７４を閉弁するときに、入口封止弁１７４を全閉状態にする手前で、開閉繰り返し制御（「開閉制御」の一例）を行う。ここで、開閉繰り返し制御は、弁体１４とゴムシール部１３ａとを摺動させた状態で、弁体１４を開弁方向と閉弁方向へ繰り返し移動させる制御である。そして、このとき詳しくは、弁体１４の開弁方向の移動量（開度変化量Ａ）よりも弁体１４の閉弁方向の移動量（開度変化量Ｂ）を大きくして、弁体１４を閉弁方向に徐々に推移させながら、弁体１４を開弁方向と閉弁方向へ繰り返し移動させる。 In this way, in the present embodiment, when there is a sealing request by the inlet sealing valve 174 and the inlet sealing valve 174 is closed, the opening / closing repetition control is performed before the inlet sealing valve 174 is fully closed. (An example of "open / close control") is performed. Here, the opening / closing repeated control is a control in which the valve body 14 is repeatedly moved in the valve opening direction and the valve closing direction while the valve body 14 and the rubber seal portion 13a are slid. Then, in detail at this time, the amount of movement of the valve body 14 in the valve closing direction (opening change amount B) is made larger than the amount of movement of the valve body 14 in the valve opening direction (opening change amount A). The valve body 14 is repeatedly moved in the valve opening direction and the valve closing direction while gradually moving the valve body 14 in the valve closing direction.

一方、ステップＳ１１において、開度ＴＡ＿ＩＮ（ｉ）が０°未満である場合（ステップＳ１１：ＮＯ）には、開閉繰り返し制御を完了させるため、開度ｔａ＿ｉｎが０以下になったら（ステップＳ１４，ステップＳ１５：ＹＥＳ）、入口封止弁１７４の封止閉弁制御（開閉繰り返し制御）を完了させる（ステップＳ１６）。このようにして、コントローラ２０１は、開閉繰り返し制御を行った後に、入口封止弁１７４を全閉状態にする。 On the other hand, in step S11, when the opening TA_IN (i) is less than 0 ° (step S11: NO), when the opening ta_in becomes 0 or less in order to complete the open / close repetition control (step S14, step). S15: YES), the sealing / closing control (repeated opening / closing control) of the inlet sealing valve 174 is completed (step S16). In this way, the controller 201 closes the inlet sealing valve 174 in a fully closed state after repeatedly controlling the opening and closing.

また、このような入口封止弁１７４に関する制御は、図８に示すように、出口統合弁１８１に関する制御においても、適用できる。 Further, as shown in FIG. 8, such a control regarding the inlet sealing valve 174 can also be applied to the control regarding the outlet integrated valve 181.

図８に示す制御は、図７に示す制御と異なる点として、開度ｔａ＿ｉｎが開度ｔａ＿ｏｕｔとなり、開度ＴＡ＿ＩＮ（ｉ）が開度ＴＡ＿ＯＵＴ（ｉ）となり、所定開度αが所定開度β（例えば、６°）となる。また、開度変化量Ａが開度変化量Ｃ（下流側弁の開弁時の開度変化量）（例えば、３°）となり、開度変化量Ｂが開度変化量Ｄ（下流側弁の閉弁時の開度変化量）（例えば、５°）となる。なお、α＞βであり、Ａ＜Ｃであり、Ｂ＜Ｄであり、Ｃ＜Ｄである。それ以外については、共通するので、説明を省略する。 The control shown in FIG. 8 differs from the control shown in FIG. 7 in that the opening ta_in is the opening ta_out, the opening TA_IN (i) is the opening TA_OUT (i), and the predetermined opening α is the predetermined opening β. (For example, 6 °). Further, the opening change amount A is the opening change amount C (opening change amount when the downstream side valve is opened) (for example, 3 °), and the opening change amount B is the opening change amount D (downstream side valve). The amount of change in opening when the valve is closed) (for example, 5 °). It should be noted that α> β, A <C, B <D, and C <D. Others are common, so explanations will be omitted.

上記の制御フローチャートに基づく制御が実行されることにより、例えば、図９に示すような制御タイムチャートで表される制御が実行される。図９に示すように、入口封止弁１７４（図中、一部、点線で示す）について、開度ｔａ＿ｉｎが所定開度α未満になり、その後、開閉繰り返し制御が行われた後、全閉状態になる。また、出口統合弁１８１について、開度ｔａ＿ｉｎが所定開度β未満になり、その後、開閉繰り返し制御が行われた後、全閉状態になる。 By executing the control based on the above control flowchart, for example, the control represented by the control time chart as shown in FIG. 9 is executed. As shown in FIG. 9, for the inlet sealing valve 174 (partially shown by a dotted line in the figure), the opening ta_in becomes less than the predetermined opening α, and then the opening / closing is repeatedly controlled and then fully closed. Become a state. Further, with respect to the outlet integrated valve 181, the opening ta_in becomes less than the predetermined opening β, and after that, the opening / closing repetition control is performed, and then the valve is fully closed.

以上のように本実施形態によれば、コントローラ２０１は、入口封止弁１７４（出口統合弁１８１）による封止要求があるときに、開閉繰り返し制御を行った後に、入口封止弁１７４（出口統合弁１８１）を全閉状態にする。 As described above, according to the present embodiment, when there is a sealing request by the inlet sealing valve 174 (outlet integrated valve 181), the controller 201 repeatedly controls opening and closing, and then the inlet sealing valve 174 (outlet). The integrated valve 181) is fully closed.

このようにして、開弁状態の入口封止弁１７４（出口統合弁１８１）を閉弁させて全閉状態にするまでに、弁体１４と弁座１３のゴムシール部１３ａとを摺動させながら、弁体１４を開弁方向と閉弁方向へ繰り返し移動させて、徐々に開度が小さくなるように制御する。これにより、ゴムシール部１３ａの捩れを解消（抑制）させて、ゴムシール部１３ａの変位量を緩和しながら、図１０に示すように、シート面１７を平面にして、入口封止弁１７４（出口統合弁１８１）を全閉状態にすることができる。そして、これにより、入口封止弁１７４（出口統合弁１８１）の全閉状態における弁体１４とゴムシール部１３ａの接地状態が安定する。そのため、弁体１４とゴムシール部１３ａの間において、シール幅の確保と接地状態の安定化の両立を図ることができる。したがって、入口封止弁１７４（出口統合弁１８１）を全閉状態にしたときに、弁体１４とゴムシール部１３ａとの間において、封止性が向上し、エア洩れを防ぐことができる。 In this way, while sliding the valve body 14 and the rubber seal portion 13a of the valve seat 13 until the inlet sealing valve 174 (outlet integrated valve 181) in the valve open state is closed to the fully closed state. , The valve body 14 is repeatedly moved in the valve opening direction and the valve closing direction, and controlled so that the opening degree gradually decreases. As a result, the twist of the rubber seal portion 13a is eliminated (suppressed), the displacement amount of the rubber seal portion 13a is alleviated, and as shown in FIG. 10, the seat surface 17 is made flat and the inlet sealing valve 174 (outlet integration). The valve 181) can be fully closed. As a result, the ground contact state between the valve body 14 and the rubber seal portion 13a in the fully closed state of the inlet sealing valve 174 (outlet integrated valve 181) is stabilized. Therefore, it is possible to secure the seal width and stabilize the ground contact state between the valve body 14 and the rubber seal portion 13a. Therefore, when the inlet sealing valve 174 (outlet integrated valve 181) is fully closed, the sealing performance is improved between the valve body 14 and the rubber seal portion 13a, and air leakage can be prevented.

ここで、入口封止弁１７４は燃料電池システム１０１の外部から取り込まれるエアが流れるエア供給通路１６１に設けられており、エア排出通路１６２に設けられ燃料電池スタック１１１で生成された水（生成水）が付着しうる出口統合弁１８１よりも乾燥状態になり易い。そのため、入口封止弁１７４において、弁体１４とゴムシール部１３ａとの間の摩擦抵抗（摺動抵抗）は、出口統合弁１８１に比べて大きくなり易い。 Here, the inlet sealing valve 174 is provided in the air supply passage 161 through which air taken in from the outside of the fuel cell system 101 flows, and is provided in the air discharge passage 162 to generate water (generated water) in the fuel cell stack 111. ) Is more likely to become dry than the outlet integrated valve 181 to which it can adhere. Therefore, in the inlet sealing valve 174, the frictional resistance (sliding resistance) between the valve body 14 and the rubber seal portion 13a tends to be larger than that of the outlet integrated valve 181.

そこで、本実施形態では、コントローラ２０１は、入口封止弁１７４にて弁体１４を開弁方向へ移動させるときの開度変化量Ａを、出口統合弁１８１にて弁体１４を開弁方向へ移動させるときの開度変化量Ｃよりも小さくする。また、コントローラ２０１は、入口封止弁１７４にて弁体１４を閉弁方向へ移動させるときの開度変化量Ｂを、出口統合弁１８１にて弁体１４を閉弁方向へ移動させるときの開度変化量Ｄよりも小さくする。そして、図９に示すように、コントローラ２０１は、入口封止弁１７４にて弁体１４を開弁方向と閉弁方向へ移動させる開閉回数（上流側弁開閉回数）を、出口統合弁１８１にて弁体１４を開弁方向と閉弁方向へ移動させる開閉回数（下流側弁開閉回数）よりも多くする。 Therefore, in the present embodiment, the controller 201 sets the opening change amount A when the valve body 14 is moved in the valve opening direction by the inlet sealing valve 174, and the valve body 14 in the valve opening direction by the outlet integrated valve 181. It is made smaller than the opening change amount C when moving to. Further, the controller 201 changes the opening degree change B when the valve body 14 is moved in the valve closing direction by the inlet sealing valve 174, and the opening degree change amount B when the valve body 14 is moved in the valve closing direction by the outlet integrated valve 181. Make it smaller than the opening change amount D. Then, as shown in FIG. 9, the controller 201 sets the number of times of opening / closing (number of times of opening / closing of the upstream valve) for moving the valve body 14 in the valve opening direction and the valve closing direction by the inlet sealing valve 174 to the outlet integrated valve 181. It is made larger than the number of times of opening and closing (the number of times of opening and closing the downstream valve) for moving the valve body 14 in the valve opening direction and the valve closing direction.

これにより、乾燥状態になり易い入口封止弁１７４について、出口統合弁１８１よりも小刻みに開閉させながら徐々に閉弁させて全閉状態にすることができるので、シール部材の捩れを解消（抑制）させることができる。そのため、出口統合弁１８１と同様に入口封止弁１７４の全閉状態における弁体１４とゴムシール部１３ａの接地状態が安定する。 As a result, the inlet sealing valve 174, which tends to be in a dry state, can be gradually closed while opening and closing in smaller steps than the outlet integrated valve 181 to completely close the valve, thereby eliminating (suppressing) the twist of the seal member. ) Can be made. Therefore, similarly to the outlet integrated valve 181 the contact state between the valve body 14 and the rubber seal portion 13a in the fully closed state of the inlet sealing valve 174 is stable.

＜第２実施形態＞
次に、第２実施形態について説明するが、第１実施形態と同等の構成要素については、同一の符号を付して説明を省略し、異なった点を中心に述べる。 <Second Embodiment>
Next, the second embodiment will be described, but the components equivalent to those of the first embodiment are designated by the same reference numerals, the description thereof will be omitted, and the differences will be mainly described.

本実施形態では、前記の第１実施形態の制御とともに、後述する全閉保持Ｄｕｔｙ制御（「全閉保持制御」の一例）と全閉Ｄｕｔｙ０％（カット）制御（「全閉保持解除制御」の一例）とを繰り返し行う制御が行われる。具体的には、コントローラ２０１は、図１１に示す制御フローチャートに基づく制御を実行する。 In the present embodiment, in addition to the control of the first embodiment, the fully closed duty control (an example of “fully closed hold control”) and the fully closed duty 0% (cut) control (“fully closed hold release control”) described later Control is performed by repeating (1 example) and. Specifically, the controller 201 executes control based on the control flowchart shown in FIG.

図１１に示すように、入口封止弁１７４による封止要求の有無を判断する（ステップＳ２０１）。そして、入口封止弁１７４による封止要求が有る場合（ステップＳ２０１：ＹＥＳ）には、入口封止弁１７４について開閉繰り返し制御（前記の図７に示す制御）が完了したか否かを判断する（ステップＳ２０２）。 As shown in FIG. 11, it is determined whether or not there is a sealing request by the inlet sealing valve 174 (step S201). Then, when there is a sealing request by the inlet sealing valve 174 (step S201: YES), it is determined whether or not the opening / closing repeated control (control shown in FIG. 7 above) of the inlet sealing valve 174 is completed. (Step S202).

そして、入口封止弁１７４について開閉繰り返し制御が完了した場合（ステップＳ２０２：ＹＥＳ）、すなわち、開閉繰り返し制御が完了して入口封止弁１７４が全閉状態になった場合には、印加オンオフ回数ｎ（ｉ）が所定回数Ｅ以上であるか否かを判断する（ステップＳ２０３）。ここで、印加オンオフ回数ｎ（ｉ）とは、入口封止弁１７４における弁体１４の駆動部に対する電圧の印加のオンとオフの回数である。 When the open / close repeat control of the inlet sealing valve 174 is completed (step S202: YES), that is, when the open / close repeat control is completed and the inlet sealing valve 174 is fully closed, the number of times of application on / off is completed. It is determined whether or not n (i) is equal to or greater than the predetermined number of times E (step S203). Here, the number of times of application on / off n (i) is the number of times of on / off of application of voltage to the drive unit of the valve body 14 in the inlet sealing valve 174.

そして、印加オンオフ回数ｎ（ｉ）が所定回数Ｅ未満である場合（ステップＳ２０３：ＮＯ）には、全閉保持Ｄｕｔｙ制御を実行した（ステップＳ２０４）後に、全閉Ｄｕｔｙ０％制御を１００ｍｓ実行する（ステップＳ２０５）。ここで、全閉保持Ｄｕｔｙ制御は、弁体１４をゴムシール部１３ａに押し付ける方向に作用させる制御であり、例えば、弁体１４の駆動部（例えば、モータ）に対して電圧がデューティ比（Ｄｕｔｙ比）１００％で１００ｍｓ（０．１秒）印加される制御である。また、全閉Ｄｕｔｙ０％制御は、弁体１４をゴムシール部１３ａから離す方向に作用させる制御であり、例えば、弁体１４の駆動部に対して電圧が１００ｍｓ印加されない制御である。 When the number of times of application on / off n (i) is less than the predetermined number of times E (step S203: NO), the fully closed duty cycle control is executed (step S204), and then the fully closed duty 0% control is executed for 100 ms (step S203: NO). Step S205). Here, the fully closed holding duty control is a control in which the valve body 14 acts in a direction of pressing against the rubber seal portion 13a. For example, the voltage is a duty ratio (duty ratio) with respect to the drive unit (for example, the motor) of the valve body 14. ) It is a control applied at 100% for 100 ms (0.1 seconds). Further, the fully closed Duty 0% control is a control in which the valve body 14 acts in a direction away from the rubber seal portion 13a, for example, a control in which a voltage of 100 ms is not applied to the drive portion of the valve body 14.

次に、印加オンオフ回数ｎ（ｉ）を以下の数式に示すようにして１回分増加させて（ステップＳ２０６）、ステップＳ２０３の処理に戻る。
［数２］
ｎ（ｉ）←ｎ（ｉ－１）＋１ Next, the number of times of application on / off n (i) is increased by one time as shown in the following formula (step S206), and the process returns to step S203.
[Number 2]
n (i) ← n (i-1) +1

そして、印加オンオフ回数ｎ（ｉ）が所定回数Ｅ以上になったら（ステップＳ２０３：ＹＥＳ）、入口封止弁１７４の封止閉弁制御を完了する（ステップＳ２０７）。 Then, when the number of times of application on / off n (i) becomes equal to or greater than the predetermined number of times E (step S203: YES), the sealing valve closing control of the inlet sealing valve 174 is completed (step S207).

なお、ステップＳ２０１において入口封止弁１７４による封止要求が無い場合（ステップＳ２０１：ＮＯ）には、通常の入口封止弁１７４の制御ルーチンの処理へ移行する。また、ステップＳ２０２において入口封止弁１７４の開閉繰り返し制御が未完了である場合（ステップＳ２０２：ＮＯ）には、印加オンオフ回数ｎ（ｉ）を「０」として（ステップＳ２０８）、入口封止弁１７４の開閉繰り返し制御ルーチンの処理へ移行する。 If there is no sealing request by the inlet sealing valve 174 in step S201 (step S201: NO), the process proceeds to the normal control routine of the inlet sealing valve 174. When the repeated opening / closing control of the inlet sealing valve 174 is not completed in step S202 (step S202: NO), the number of applied on / off times n (i) is set to “0” (step S208), and the inlet sealing valve is used. The process shifts to the processing of the open / close repeat control routine of 174.

上記の制御フローチャートに基づく制御が実行されることにより、例えば、図１２に示すような制御タイムチャートで表される制御が実行される。図１２に示すように、時刻ｔ１で、開閉繰り返し制御が完了して、その後、時刻ｔ２まで、全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御が所定回数Ｅ（図１２では一例として、４回）分繰り返し行われる。 By executing the control based on the above control flowchart, for example, the control represented by the control time chart as shown in FIG. 12 is executed. As shown in FIG. 12, the opening / closing repetition control is completed at time t1, and then until time t2, the fully closed holding duty control and the fully closed duty 0% control are performed a predetermined number of times E (4 times as an example in FIG. 12). It is repeated for a minute.

また、このような入口封止弁１７４に関する制御は、図１４に示すように、出口統合弁１８１に関する制御においても、適用できる。 Further, such control regarding the inlet sealing valve 174 can also be applied to control regarding the outlet integrated valve 181 as shown in FIG.

図１４に示す制御は、図１１に示す制御と異なる点として、所定回数Ｅが所定回数Ｆとなる。なお、Ｅ＞Ｆである。それ以外については、共通するので、説明を省略する。 The control shown in FIG. 14 differs from the control shown in FIG. 11 in that the predetermined number of times E is the predetermined number of times F. In addition, E> F. Others are common, so explanations will be omitted.

上記の制御フローチャートに基づく制御が実行されることにより、例えば、図１５に示すような制御タイムチャートで表される制御が実行される。図１５に示すように、時刻ｔ１で開閉繰り返し制御が完了して、その後、時刻ｔ２まで、全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御が所定回数Ｆ（図１５では一例として、３回）分繰り返し行われる。 By executing the control based on the above control flowchart, for example, the control represented by the control time chart as shown in FIG. 15 is executed. As shown in FIG. 15, the opening / closing repetition control is completed at time t1, and then until time t2, the fully closed holding duty control and the fully closed duty 0% control are performed for a predetermined number of times F (three times as an example in FIG. 15). It is repeated.

以上のように本実施形態によれば、コントローラ２０１は、入口封止弁１７４（出口統合弁１８１）を全閉状態にした後に、全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御とを繰り返し行う。 As described above, according to the present embodiment, the controller 201 repeatedly performs the fully closed holding duty control and the fully closed duty 0% control after the inlet sealing valve 174 (outlet integrated valve 181) is fully closed.

このようにして、入口封止弁１７４（出口統合弁１８１）を全閉状態にした後に、全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御とを繰り返し行うことで、ゴムシール部１３ａの捩れを解消（抑制）させることができる。これにより、入口封止弁１７４（出口統合弁１８１）の全閉状態における弁体１４とゴムシール部１３ａの接地状態が安定する。そのため、弁体１４とゴムシール部１３ａの間において、シール幅の確保と接地状態の安定化の両立を図ることができる。したがって、入口封止弁１７４（出口統合弁１８１）を全閉状態にしたときに、弁体１４とゴムシール部１３ａとの間において、封止性が向上し、エア洩れを防ぐことができる。 In this way, after the inlet sealing valve 174 (outlet integrated valve 181) is fully closed, the fully closed holding duty control and the fully closed duty 0% control are repeatedly performed to eliminate the twist of the rubber seal portion 13a (the twist of the rubber seal portion 13a is eliminated. Can be suppressed). As a result, the ground contact state between the valve body 14 and the rubber seal portion 13a in the fully closed state of the inlet sealing valve 174 (outlet integrated valve 181) is stabilized. Therefore, it is possible to secure the seal width and stabilize the ground contact state between the valve body 14 and the rubber seal portion 13a. Therefore, when the inlet sealing valve 174 (outlet integrated valve 181) is fully closed, the sealing performance is improved between the valve body 14 and the rubber seal portion 13a, and air leakage can be prevented.

すなわち、図１３に示すように、入口封止弁１７４や出口統合弁１８１について、全閉状態における弁体１４とゴムシール部１３ａの接地状態が安定し、弁体１４とゴムシール部１３ａの間におけるエア洩れが発生しない。 That is, as shown in FIG. 13, with respect to the inlet sealing valve 174 and the outlet integrated valve 181, the ground contact state between the valve body 14 and the rubber seal portion 13a is stable in the fully closed state, and the air between the valve body 14 and the rubber seal portion 13a is stable. No leaks occur.

ここで、入口封止弁１７４は、前記のように、出口統合弁１８１よりも乾燥状態になり易い。そのため、入口封止弁１７４において、弁体１４とゴムシール部１３ａとの間の摩擦抵抗（摺動抵抗）は、出口統合弁１８１に比べて大きくなり易い。そこで、本実施形態では、所定回数Ｅを所定回数Ｆよりも多くする。すなわち、入口封止弁１７４にて全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御を行う回数（上流側弁の全閉保持解除回数）を、出口統合弁１８１にて全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御を行う回数（下流側弁の全閉保持解除回数）よりも多くする。 Here, the inlet sealing valve 174 is more likely to be in a dry state than the outlet integrated valve 181 as described above. Therefore, in the inlet sealing valve 174, the frictional resistance (sliding resistance) between the valve body 14 and the rubber seal portion 13a tends to be larger than that of the outlet integrated valve 181. Therefore, in the present embodiment, the predetermined number of times E is made larger than the predetermined number of times F. That is, the number of times the fully closed holding duty control and the fully closed duty 0% control are performed by the inlet sealing valve 174 (the number of times the fully closed holding release of the upstream side valve) is performed, and the fully closed holding duty control and the fully closed are performed by the outlet integrated valve 181. It should be larger than the number of times the duty 0% control is performed (the number of times the downstream valve is fully closed and released).

これにより、入口封止弁１７４について、出口統合弁１８１よりも多くの回数について弁体１４とゴムシール部１３ａを摺動させて全閉状態にすることができるので、出口統合弁１８１と同様に入口封止弁１７４についてもゴムシール部１３ａの捩れを解消させることができる。そのため、入口封止弁１７４と出口統合弁１８１の全閉状態における弁体１４とゴムシール部１３ａの接地状態が安定する。 As a result, the inlet sealing valve 174 can be fully closed by sliding the valve body 14 and the rubber seal portion 13a more times than the outlet integrated valve 181. Therefore, the inlet is similarly closed as the outlet integrated valve 181. The twist of the rubber seal portion 13a can be eliminated for the sealing valve 174 as well. Therefore, the ground contact state of the valve body 14 and the rubber seal portion 13a in the fully closed state of the inlet sealing valve 174 and the outlet integrated valve 181 is stable.

＜第３実施形態＞
次に、第３実施形態について説明するが、第１，２実施形態と同等の構成要素については、同一の符号を付して説明を省略し、異なった点を中心に述べる。 <Third Embodiment>
Next, the third embodiment will be described, but the components equivalent to those of the first and second embodiments are designated by the same reference numerals, the description thereof will be omitted, and the differences will be mainly described.

本実施形態では、前記の第２実施形態で行う制御のうち、全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御を繰り返し行う制御が単独で行われる。具体的には、コントローラ２０１は、図１６に示す制御フローチャートに基づく制御を実行する。 In the present embodiment, among the controls performed in the second embodiment, the control for repeatedly performing the fully closed duty cycle control and the fully closed duty 0% control is performed independently. Specifically, the controller 201 executes control based on the control flowchart shown in FIG.

まず、図１６に示すように、入口封止弁１７４による封止要求の有無を判断する（ステップＳ４０１）。そして、入口封止弁１７４による封止要求が有る場合（ステップＳ４０１：ＹＥＳ）には、開弁状態の入口封止弁１７４を閉弁する制御を行う（ステップＳ４０２）。そして、入口封止弁１７４が全閉状態になった（ステップＳ４０３：ＹＥＳ）後に、全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御とを所定回数Ｅ分繰り返し行ったら（ステップＳ４０４～Ｓ４０７）、入口封止弁１７４の封止閉弁制御を完了する（ステップＳ４０８）。 First, as shown in FIG. 16, it is determined whether or not there is a sealing request by the inlet sealing valve 174 (step S401). Then, when there is a sealing request by the inlet sealing valve 174 (step S401: YES), control is performed to close the inlet sealing valve 174 in the opened state (step S402). Then, after the inlet sealing valve 174 is fully closed (step S403: YES), the fully closed holding duty control and the fully closed duty 0% control are repeated a predetermined number of times for E minutes (steps S404 to S407), and then the inlet. The sealing valve closing control of the sealing valve 174 is completed (step S408).

上記の制御フローチャートに基づく制御が実行されることにより、例えば、図１７に示すような制御タイムチャートで表される制御が実行される。図１７に示すように、時刻ｔ１で入口封止弁１７４が全閉状態になると、時刻ｔ２から時刻ｔ３まで全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙカット制御が繰り返し行われる。 By executing the control based on the above control flowchart, for example, the control represented by the control time chart as shown in FIG. 17 is executed. As shown in FIG. 17, when the inlet sealing valve 174 is fully closed at time t1, the fully closed holding duty control and the fully closed duty cut control are repeatedly performed from time t2 to time t3.

また、このような入口封止弁１７４に関する制御は、図１８に示すように、出口統合弁１８１に関する制御においても、適用できる。 Further, as shown in FIG. 18, such control regarding the inlet sealing valve 174 can also be applied to control regarding the outlet integrated valve 181.

図１８に示す制御は、図１６に示す制御と異なる点として、所定回数Ｅが所定回数Ｆとなる。それ以外については、共通するので、説明を省略する。 The control shown in FIG. 18 differs from the control shown in FIG. 16 in that the predetermined number of times E is the predetermined number of times F. Others are common, so explanations will be omitted.

上記の制御フローチャートに基づく制御が実行されることにより、例えば、図１９に示すような制御タイムチャートで表される制御が実行される。図１９に示すように、時刻ｔ１で出口統合弁１８１が全閉状態になると、時刻ｔ２から時刻ｔ３まで全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙカット制御が繰り返し行われる。 By executing the control based on the above control flowchart, for example, the control represented by the control time chart as shown in FIG. 19 is executed. As shown in FIG. 19, when the outlet integrated valve 181 is fully closed at time t1, the fully closed holding duty control and the fully closed duty cut control are repeatedly performed from time t2 to time t3.

なお、上記した実施の形態は単なる例示にすぎず、本開示を何ら限定するものではなく、その要旨を逸脱しない範囲内で種々の改良、変形が可能であることはもちろんである。 It should be noted that the above-described embodiment is merely an example and does not limit the present disclosure in any way, and it goes without saying that various improvements and modifications can be made without departing from the gist thereof.

例えば、前記のように弁座１３にゴムシール部１３ａが設けられている代わりに、弁体１４にゴムシール部が設けられていてもよい。また、前記の制御フローチャートに基づく制御は、バイパス弁１９１に適用してもよい。また、弁体１４と弁座１３の位置を入れ替えて、全閉保持Ｄｕｔｙ制御について弁体１４を弁座１３のゴムシール部１３ａから離す方向に作用させる制御とし、全閉Ｄｕｔｙ０％制御について弁体１４を弁座１３のゴムシール部１３ａに押し付ける方向に作用させる制御としてもよい。また、弁体１４を開弁方向と閉弁方向へ１回のみ移動させる制御（「開閉制御」の一例）を行うとしてもよい。また、全閉保持Ｄｕｔｙ制御と全閉Ｄｕｔｙ０％制御を１回のみ行うとしてもよい。 For example, instead of the valve seat 13 being provided with the rubber seal portion 13a as described above, the valve body 14 may be provided with the rubber seal portion 13. Further, the control based on the control flowchart may be applied to the bypass valve 191. Further, the positions of the valve body 14 and the valve seat 13 are exchanged so that the valve body 14 acts in the direction away from the rubber seal portion 13a of the valve seat 13 for the fully closed duty control, and the valve body 14 for the fully closed duty 0% control. May be controlled to act in the direction of pressing against the rubber seal portion 13a of the valve seat 13. Further, control for moving the valve body 14 only once in the valve opening direction and the valve closing direction (an example of "open / close control") may be performed. Further, the fully closed duty cycle control and the fully closed duty 0% control may be performed only once.

１ 流量制御弁
２ 弁部
１３ 弁座
１３ａ ゴムシール部
１４ 弁体
１６ 弁孔
１７ シート面
１８ シール面
１０１ 燃料電池システム
１１１ 燃料電池スタック（燃料電池）
１１２ 水素系
１１３ エア系
１６１ エア供給通路
１６２ エア排出通路
１７４ 入口封止弁
１８１ 出口統合弁
１９１ バイパス弁
２０１ コントローラ
ｔａ＿ｉｎ 開度（実開度）
ＴＡ＿ＩＮ（ｉ） 開度
α 所定開度
Ａ 開度変化量
Ｂ 開度変化量
ｔａ＿ｏｕｔ 開度（実開度）
ＴＡ＿ＯＵＴ（ｉ） 開度
β 所定開度
Ｃ 開度変化量
Ｄ 開度変化量
ｎ（ｉ） 印加オンオフ回数
Ｅ 所定回数
Ｆ 所定回数
ｔ１，ｔ２ 時刻 1 Flow control valve 2 Valve part 13 Valve seat 13a Rubber seal part 14 Valve body 16 Valve hole 17 Seat surface 18 Seal surface 101 Fuel cell system 111 Fuel cell stack (fuel cell)
112 Hydrogen system 113 Air system 161 Air supply passage 162 Air discharge passage 174 Inlet sealing valve 181 Outlet integrated valve 191 Bypass valve 201 Controller ta_in Opening (actual opening)
TA_IN (i) Opening α Predetermined opening A Opening change amount B Opening change amount ta_out Opening (actual opening)
TA_OUT (i) Opening β Predetermined opening C Opening change amount D Opening change amount n (i) Application on / off number E Predetermined number F Predetermined number t1, t2 Time

Claims (10)

ガスが流れるガス流路と、前記ガス流路を開閉する封止弁と、前記封止弁の開閉動作を制御する制御部とを備える封止弁制御システムにおいて、
前記封止弁は、
弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、
前記制御部は、
前記封止弁による封止要求があるときに、
前記弁座又は前記弁体と前記シール部材とを摺動させた状態で前記弁体の開弁方向の移動量よりも前記弁体の閉弁方向の移動量を大きくしながら前記弁体を開弁方向と閉弁方向へ移動させる開閉制御を行い、
前記弁体を閉弁方向へ移動させる制御を行った際に、前記封止弁が全閉状態における所定の開度未満となったときに、前記開閉制御を完了すること、
を特徴とする封止弁制御システム。 In a sealing valve control system including a gas flow path through which gas flows, a sealing valve for opening and closing the gas flow path, and a control unit for controlling the opening and closing operation of the sealing valve.
The sealing valve is
A seal member for sealing between the valve body and the valve seat is provided on either the valve seat or the valve body.
The control unit
When there is a sealing request by the sealing valve,
The valve body is opened while the amount of movement of the valve body in the valve closing direction is larger than the amount of movement of the valve body in the valve opening direction in a state where the valve seat or the valve body and the seal member are slid. Open / close control to move in the valve direction and valve closing direction ,
When the valve body is controlled to move in the valve closing direction and the sealing valve becomes less than a predetermined opening in the fully closed state, the opening / closing control is completed.
A sealing valve control system featuring. 請求項１の封止弁制御システムにおいて、
前記開閉制御では、前記弁体を開弁方向と閉弁方向へ繰り返し移動させること、
を特徴とする封止弁制御システム。 In the sealing valve control system of claim 1,
In the opening / closing control, the valve body is repeatedly moved in the valve opening direction and the valve closing direction.
A sealing valve control system featuring. 請求項１または２の封止弁制御システムにおいて、
前記制御部は、
前記封止弁を全閉状態にした後に、前記弁体を前記弁座に押し付ける方向に作用させる全閉保持制御と、前記弁体を前記弁座から離す方向に作用させる全閉保持解除制御と、を行うこと、
を特徴とする封止弁制御システム。 In the sealing valve control system of claim 1 or 2.
The control unit
Fully closed holding control that acts in the direction of pressing the valve body against the valve seat after the sealing valve is fully closed, and fully closed holding release control that acts in the direction of separating the valve body from the valve seat. To do,
A sealing valve control system featuring. 請求項３の封止弁制御システムにおいて、
前記制御部は、
前記全閉保持制御と前記全閉保持解除制御とを繰り返し行うこと、
を特徴とする封止弁制御システム。 In the sealing valve control system of claim 3,
The control unit
Repeating the fully closed holding control and the fully closed holding release control,
A sealing valve control system featuring. ガスが流れるガス流路と、前記ガス流路を開閉する封止弁と、前記封止弁の開閉動作を制御する制御部とを備える封止弁制御システムにおいて、
前記封止弁は、
弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、
前記制御部は、
前記封止弁を全閉状態にした後に、前記弁体を前記弁座に押し付ける方向に作用させる全閉保持制御と、前記弁体を前記弁座から離す方向に作用させる全閉保持解除制御と、を行い、
前記全閉保持制御を行って、前記全閉保持制御と前記全閉保持解除制御とからなる制御を完了すること、
を特徴とする封止弁制御システム。 In a sealing valve control system including a gas flow path through which gas flows, a sealing valve for opening and closing the gas flow path, and a control unit for controlling the opening and closing operation of the sealing valve.
The sealing valve is
A seal member for sealing between the valve body and the valve seat is provided on either the valve seat or the valve body.
The control unit
Fully closed holding control that acts in the direction of pressing the valve body against the valve seat after the sealing valve is fully closed, and fully closed holding release control that acts in the direction of separating the valve body from the valve seat. , Do,
Performing the fully closed holding control to complete the control including the fully closed holding control and the fully closed holding release control.
A sealing valve control system featuring. 請求項５の封止弁制御システムにおいて、
前記制御部は、
前記全閉保持制御と前記全閉保持解除制御とを繰り返し行うこと、
を特徴とする封止弁制御システム。 In the sealing valve control system of claim 5,
The control unit
Repeating the fully closed holding control and the fully closed holding release control,
A sealing valve control system featuring. 燃料電池と、前記燃料電池に酸化剤ガスを供給するための酸化剤ガス供給通路と、前記酸化剤ガス供給通路に設けられた上流側弁と、前記燃料電池に供給された酸化剤ガスを排出するための酸化剤ガス排出通路と、前記酸化剤ガス排出通路に設けられた下流側弁と、各種制御を行う制御部と、を有する燃料電池システムにおいて、
前記上流側弁と前記下流側弁は、
弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、
前記制御部は、
前記上流側弁または前記下流側弁による封止要求があるときに、前記弁座又は前記弁体と前記シール部材とを摺動させた状態で前記弁体の開弁方向の移動量よりも前記弁体の閉弁方向の移動量を大きくしながら前記弁体を開弁方向と閉弁方向へ移動させる開閉制御を行った後に、前記上流側弁または前記下流側弁を全閉状態にし、
前記上流側弁における前記弁体の開弁方向または閉弁方向の移動量を、前記下流側弁における前記弁体の開弁方向または閉弁方向の移動量よりも小さくすること、
を特徴とする燃料電池システム。 The fuel cell, the oxidant gas supply passage for supplying the oxidant gas to the fuel cell, the upstream valve provided in the oxidant gas supply passage, and the oxidant gas supplied to the fuel cell are discharged. In a fuel cell system having an oxidant gas discharge passage for the fuel, a downstream valve provided in the oxidant gas discharge passage, and a control unit for performing various controls.
The upstream side valve and the downstream side valve are
A seal member for sealing between the valve body and the valve seat is provided on either the valve seat or the valve body.
The control unit
When there is a sealing request by the upstream side valve or the downstream side valve, the movement amount of the valve body in the valve opening direction in a state where the valve seat or the valve body and the seal member are slid is described. After performing open / close control to move the valve body in the valve opening direction and the valve closing direction while increasing the amount of movement of the valve body in the valve closing direction, the upstream side valve or the downstream side valve is fully closed.
To make the amount of movement of the valve body in the valve opening direction or valve closing direction in the upstream side valve smaller than the amount of movement of the valve body in the valve opening direction or valve closing direction in the downstream side valve.
A fuel cell system featuring. 請求項７の燃料電池システムにおいて、
前記制御部は、
前記上流側弁にて前記弁体を開弁方向と閉弁方向へ移動させる開閉回数を、前記下流側弁にて前記弁体を開弁方向と閉弁方向へ移動させる開閉回数よりも多くすること、
を特徴とする燃料電池システム。 In the fuel cell system of claim 7,
The control unit
The number of times of opening and closing to move the valve body in the valve opening direction and the valve closing direction by the upstream side valve is larger than the number of times of opening and closing to move the valve body in the valve opening direction and the valve closing direction by the downstream side valve. matter,
A fuel cell system featuring. 燃料電池と、前記燃料電池に酸化剤ガスを供給するための酸化剤ガス供給通路と、前記酸化剤ガス供給通路に設けられた上流側弁と、前記燃料電池に供給された酸化剤ガスを排出するための酸化剤ガス排出通路と、前記酸化剤ガス排出通路に設けられた下流側弁と、各種制御を行う制御部と、を有する燃料電池システムにおいて、
前記上流側弁と前記下流側弁は、
弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、
前記制御部は、
前記上流側弁または前記下流側弁による封止要求があるときに、前記弁座又は前記弁体と前記シール部材とを摺動させた状態で前記弁体の開弁方向の移動量よりも前記弁体の閉弁方向の移動量を大きくしながら前記弁体を開弁方向と閉弁方向へ移動させる開閉制御を行った後に、前記上流側弁または前記下流側弁を全閉状態にし、
前記上流側弁にて前記弁体を開弁方向と閉弁方向へ移動させる開閉回数を、前記下流側弁にて前記弁体を開弁方向と閉弁方向へ移動させる開閉回数よりも多くすること、
を特徴とする燃料電池システム。 The fuel cell, the oxidant gas supply passage for supplying the oxidant gas to the fuel cell, the upstream valve provided in the oxidant gas supply passage, and the oxidant gas supplied to the fuel cell are discharged. In a fuel cell system having an oxidant gas discharge passage for the fuel, a downstream valve provided in the oxidant gas discharge passage, and a control unit for performing various controls.
The upstream side valve and the downstream side valve are
A seal member for sealing between the valve body and the valve seat is provided on either the valve seat or the valve body.
The control unit
When there is a sealing request by the upstream side valve or the downstream side valve, the movement amount of the valve body in the valve opening direction in a state where the valve seat or the valve body and the seal member are slid is described. After performing open / close control to move the valve body in the valve opening direction and the valve closing direction while increasing the amount of movement of the valve body in the valve closing direction, the upstream side valve or the downstream side valve is fully closed.
The number of times of opening and closing to move the valve body in the valve opening direction and the valve closing direction by the upstream side valve is larger than the number of times of opening and closing to move the valve body in the valve opening direction and the valve closing direction by the downstream side valve. matter,
A fuel cell system featuring. 燃料電池と、前記燃料電池に酸化剤ガスを供給するための酸化剤ガス供給通路と、前記酸化剤ガス供給通路に設けられた上流側弁と、前記燃料電池に供給された酸化剤ガスを排出するための酸化剤ガス排出通路と、前記酸化剤ガス排出通路に設けられた下流側弁と、各種制御を行う制御部と、を有する燃料電池システムにおいて、
前記上流側弁と前記下流側弁は、
弁座又は弁体のいずれか一方に、前記弁体と前記弁座との間を封止するシール部材が設けられており、
前記制御部は、
前記上流側弁または前記下流側弁を全閉状態にした後に、前記弁体を前記弁座に押し付ける方向に作用させる全閉保持制御と、前記弁体を前記弁座から離す方向に作用させる全閉保持解除制御と、を行い、
前記上流側弁にて前記全閉保持制御と前記全閉保持解除制御を行う回数を、前記下流側弁にて前記全閉保持制御と前記全閉保持解除制御を行う回数よりも多くすること、
を特徴とする燃料電池システム。 The fuel cell, the oxidant gas supply passage for supplying the oxidant gas to the fuel cell, the upstream valve provided in the oxidant gas supply passage, and the oxidant gas supplied to the fuel cell are discharged. In a fuel cell system having an oxidant gas discharge passage for the fuel, a downstream valve provided in the oxidant gas discharge passage, and a control unit for performing various controls.
The upstream side valve and the downstream side valve are
A seal member for sealing between the valve body and the valve seat is provided on either the valve seat or the valve body.
The control unit
Fully closed holding control that acts in the direction of pressing the valve body against the valve seat after the upstream valve or the downstream side valve is fully closed, and all that acts in the direction of separating the valve body from the valve seat. Close hold release control, and
The number of times the fully closed holding control and the fully closed holding release control are performed by the upstream side valve is larger than the number of times the fully closed holding control and the fully closed holding release control are performed by the downstream side valve.
A fuel cell system featuring.
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WO2015098952A1 (en) 2013-12-25 2015-07-02 愛三工業株式会社 Double eccentric valve
JP2017116012A (en) 2015-12-25 2017-06-29 愛三工業株式会社 Eccentric valve
JP2017180611A (en) 2016-03-29 2017-10-05 愛三工業株式会社 Sealing valve control system

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JP2003194252A (en) 2001-12-28 2003-07-09 Matsushita Electric Ind Co Ltd Fluid control device
JP2005009562A (en) 2003-06-18 2005-01-13 Tomoe Tech Res Co Valve element opening/closing mechanism of butterfly valve
JP2009037770A (en) 2007-07-31 2009-02-19 Nissan Motor Co Ltd Fuel cell system and its operation stop method
WO2012007989A1 (en) 2010-07-13 2012-01-19 トヨタ自動車株式会社 Piping unit for use in fuel cell and fuel cell unit provided therewith, and fuel cell system
WO2015098952A1 (en) 2013-12-25 2015-07-02 愛三工業株式会社 Double eccentric valve
JP2017116012A (en) 2015-12-25 2017-06-29 愛三工業株式会社 Eccentric valve
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