JP6394525B2 - Heat pump steam generator - Google Patents

Heat pump steam generator Download PDF

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JP6394525B2
JP6394525B2 JP2015139703A JP2015139703A JP6394525B2 JP 6394525 B2 JP6394525 B2 JP 6394525B2 JP 2015139703 A JP2015139703 A JP 2015139703A JP 2015139703 A JP2015139703 A JP 2015139703A JP 6394525 B2 JP6394525 B2 JP 6394525B2
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heat pump
steam
water supply
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JP2017020733A5 (en
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中村　淳
淳 中村
拓人 小池
拓人 小池
修平 柴田
修平 柴田
泰二 森
泰二 森
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Fuji Electric 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
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/52—Heat recovery pumps, i.e. heat pump based systems or units able to transfer the thermal energy from one area of the premises or part of the facilities to a different one, improving the overall efficiency
    • 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
    • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
    • Y02P80/00—Climate change mitigation technologies for sector-wide applications
    • Y02P80/10—Efficient use of energy, e.g. using compressed air or pressurized fluid as energy carrier
    • Y02P80/15—On-site combined power, heat or cool generation or distribution, e.g. combined heat and power [CHP] supply

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Description

本発明は、外部熱源から熱を回収して蒸気を生成するヒートポンプ式蒸気生成装置に関する。   The present invention relates to a heat pump steam generator that recovers heat from an external heat source to generate steam.

蒸気生成装置の一つとして、工場排水や使用済冷却水等の排温水等の温水から熱を回収して蒸気を生成するヒートポンプ式蒸気生成装置がある（例えば、特許文献１参照）。ヒートポンプ式蒸気生成装置は、ヒートポンプ部の蒸発器を排熱回収器として機能させ、ここで熱源温水から熱を冷媒に回収し、回収した熱を利用して凝縮器で被加熱水を加熱して蒸気を生成するため、ボイラ設備等を利用して蒸気を発生させる燃焼系蒸気生成装置に比べてランニングコストやＣＯ２の排出量を低減できるメリットがある。 As one of the steam generators, there is a heat pump steam generator that recovers heat from warm water such as industrial waste water or waste water such as used cooling water to generate steam (see, for example, Patent Document 1). In the heat pump steam generator, the evaporator of the heat pump unit functions as an exhaust heat recovery device, where heat is recovered from the heat source hot water into the refrigerant, and the water to be heated is heated by the condenser using the recovered heat. Since steam is generated, there is an advantage that the running cost and CO 2 emission amount can be reduced as compared with the combustion system steam generating apparatus that generates steam using boiler equipment or the like.

特開２０１２−４２２０５号公報JP 2012-42205 A

ところで、上記のようなヒートポンプ式蒸気生成装置では、装置の運転停止中に装置温度が低下した場合、蒸気生成部の経路内で水蒸気が凝縮して圧力が下がり、系外から空気等の非凝縮性ガスや水が入り込むことがある。例えば、非凝縮性ガスが経路内に入り込んだ場合には混入したガスの分圧分だけ生成される水蒸気温度が低下し、水が入り込んだ場合には蒸気生成時に混入した水の熱容量分だけ余分な熱量が必要となって装置起動時間が長くなるという問題を生じる。   By the way, in the heat pump type steam generator as described above, when the temperature of the apparatus is lowered while the operation of the apparatus is stopped, the water vapor is condensed in the path of the steam generation section, the pressure is lowered, and the non-condensation such as air from outside the system. Sex gas and water may enter. For example, when non-condensable gas enters the path, the temperature of the water vapor generated is reduced by the partial pressure of the mixed gas, and when water enters, an extra heat capacity is added for the water mixed during steam generation. A large amount of heat is required, resulting in a problem that the apparatus start-up time becomes long.

ところが、上記特許文献１のヒートポンプ式蒸気生成装置では、運転停止後に蒸気生成部の凝縮器内の蒸気が凝縮し、内部が負圧になることを防止するため、凝縮器付近の蒸気配管に真空破壊弁を設け、外気を導入する構成としている。このため、非凝縮性ガスや水が蒸気生成部の経路内に入り込む問題を生じることになる。   However, in the heat pump steam generator of Patent Document 1, the steam in the condenser of the steam generator is condensed after the operation is stopped, and the steam piping near the condenser is vacuumed to prevent the inside from becoming negative pressure. A break-off valve is provided to introduce outside air. For this reason, the problem that noncondensable gas and water enter in the path | route of a vapor | steam production | generation part will arise.

本発明は、上記従来技術の課題を考慮してなされたものであり、装置の運転停止中に蒸気生成部の経路内に非凝縮性ガスや水が入り込むことを防止して、装置を迅速に起動させ、生成される水蒸気温度を十分に高めることができるヒートポンプ式蒸気生成装置を提供することを目的とする。   The present invention has been made in view of the above-described problems of the prior art, and prevents the non-condensable gas and water from entering the path of the steam generation unit during the operation stop of the apparatus, thereby quickly accelerating the apparatus. An object of the present invention is to provide a heat pump type steam generating device that can be activated and sufficiently increase the generated water vapor temperature.

本発明に係るヒートポンプ式蒸気生成装置は、冷媒を圧縮する圧縮機と、該圧縮機で圧縮された冷媒を凝縮させる凝縮器と、該凝縮器を出た冷媒を減圧する膨張機構と、外部熱源から回収した熱で冷媒を蒸発させる蒸発器とを環状に接続したヒートポンプ部と、被加熱水を前記冷媒によって加熱する前記凝縮器、前記凝縮器で生成された気液二相流が流通する蒸気経路、該蒸気経路から供給される気液二相流を水と水蒸気とに分離する水蒸気分離器、該水蒸気分離器で分離された水蒸気を分離した水を前記凝縮器に流通させる水循環経路、該水循環経路に接続され、給水ポンプの動力によって前記被加熱水を供給する給水経路及び前記水蒸気分離器で分離された水蒸気を外部に送り出す送出経路を有する蒸気生成部とを備えるヒートポンプ式蒸気生成装置であって、前記給水経路に設けられた給水弁と、前記送出経路に設けられた送出弁と、該給水弁及び該送出弁を開閉制御する制御部とを備え、前記制御部は、当該ヒートポンプ式蒸気生成装置の運転停止時に前記給水弁及び前記送出弁を閉制御することを特徴とする。   A heat pump type steam generator according to the present invention includes a compressor that compresses a refrigerant, a condenser that condenses the refrigerant compressed by the compressor, an expansion mechanism that decompresses the refrigerant that has exited the condenser, and an external heat source. A heat pump unit that annularly connects an evaporator that evaporates the refrigerant with the heat recovered from the heat, the condenser that heats the water to be heated by the refrigerant, and the vapor that the gas-liquid two-phase flow generated by the condenser circulates A water vapor separator that separates the gas-liquid two-phase flow supplied from the steam path into water and water vapor, a water circulation path that distributes water separated from the water vapor separated by the water vapor separator to the condenser, A heat pump type comprising a water supply path that is connected to a water circulation path and that supplies the water to be heated by the power of a water supply pump, and a steam generation section that has a delivery path that sends out the water vapor separated by the water vapor separator to the outside. An air generating device, comprising: a water supply valve provided in the water supply path; a delivery valve provided in the delivery path; and a control unit that controls the opening and closing of the water supply valve and the delivery valve; The water supply valve and the delivery valve are closed when the heat pump steam generator is stopped.

このような構成によれば、装置の運転停止時に給水弁及び送出弁が閉制御されることで蒸気生成部の経路内が密閉されるため、装置の運転停止中に装置温度が低下し、蒸気生成部の経路内で水蒸気が凝縮して圧力が下がった場合であっても外部からの水や空気の流入が防止される。その結果、例えば非凝縮性ガスである空気が蒸気生成部の経路内に入り込むことで混入したガスの分圧分だけ生成される水蒸気温度が低下すること、さらに水が入り込むことで混入した水の熱容量分だけ余分な熱量が必要となって装置起動時間が長くなることを回避できる。これにより、運転停止後に装置を迅速に起動させ、生成される水蒸気温度を十分に高めることができる。   According to such a configuration, the water supply valve and the delivery valve are controlled to be closed when the operation of the apparatus is stopped, thereby sealing the inside of the path of the steam generation unit. Even when water vapor condenses in the path of the generator and the pressure drops, the inflow of water or air from the outside is prevented. As a result, for example, air that is a non-condensable gas enters the path of the steam generation unit, the water vapor temperature that is generated by the partial pressure of the mixed gas is lowered, and water that is mixed in when water enters further It can be avoided that an extra amount of heat is required by the heat capacity and the apparatus start-up time is lengthened. Thereby, after an operation stop, an apparatus can be started rapidly and the water vapor | steam temperature produced | generated can fully be raised.

前記水蒸気分離器の液相領域又は前記水循環経路に接続され、外部に水を排出するブローダウン経路をさらに備え、前記ブローダウン経路にブローダウン弁を備え、前記制御部は、当該ヒートポンプ式蒸気生成装置の運転停止時に前記ブローダウン弁を閉制御する構成としてもよい。これにより、装置の運転停止中にブローダウン経路から外部の水や空気が流入することも防止できる。   Connected to the liquid phase region of the water vapor separator or the water circulation path, further comprising a blow-down path for discharging water to the outside, further comprising a blow-down valve in the blow-down path, and the control unit generates the heat pump steam The blow-down valve may be closed when the operation of the apparatus is stopped. Thereby, it is also possible to prevent external water and air from flowing in from the blow-down path while the operation of the apparatus is stopped.

前記蒸気生成部は、蒸気圧力を検出する圧力検出手段を有し、前記制御部は、当該ヒートポンプ式蒸気生成装置の運転時に前記圧力検出手段の検出値に基づいて前記送出弁を開制御する構成であってもよい。そうすると、装置の運転時における蒸気生成部の経路内での圧力に応じて送出弁を開制御し、運転時に生成される水蒸気を送出経路から外部へと送り出すことができる。   The steam generation unit includes a pressure detection unit that detects a steam pressure, and the control unit opens the delivery valve based on a detection value of the pressure detection unit during operation of the heat pump steam generation device. It may be. Then, the delivery valve can be controlled to open according to the pressure in the path of the steam generation unit during operation of the apparatus, and the water vapor generated during operation can be sent out from the delivery path.

前記蒸気生成部は、蒸気圧力を検出する圧力検出手段を有し、前記制御部は、当該ヒートポンプ式蒸気生成装置の運転時に前記圧力検出手段の検出値に基づいて前記送出弁及び前記ブローダウン弁を開制御する構成であってもよい。そうすると、装置の運転時における蒸気生成部の経路内での圧力に応じて送出弁及びブローダウン弁を開制御し、運転時に生成される水蒸気を送出経路から外部へと送り出しつつ、ブローダウン経路からの水の排出を行うことができる。   The steam generation unit includes pressure detection means for detecting a steam pressure, and the control unit is configured to control the delivery valve and the blowdown valve based on a detection value of the pressure detection means during operation of the heat pump steam generation device. The configuration may be such that the opening is controlled. Then, the delivery valve and the blow-down valve are controlled to open according to the pressure in the path of the steam generation unit during the operation of the apparatus, and the steam generated during the operation is sent out from the delivery path to the outside. Water can be discharged.

前記蒸気生成部は、蒸気圧力を検出する圧力検出手段を有し、前記制御部は、当該ヒートポンプ式蒸気生成装置の運転時に前記圧力検出手段の検出値に基づいて前記給水弁を開制御する構成であってもよい。そうすると、装置の運転時における蒸気生成部の経路内での圧力に応じて給水弁を開制御し、運転時に給水を行って水蒸気の生成を継続することができる。   The steam generation unit has pressure detection means for detecting a steam pressure, and the control unit opens the water supply valve based on a detection value of the pressure detection means during operation of the heat pump steam generation device. It may be. Then, the water supply valve can be controlled to open according to the pressure in the path of the steam generation unit during operation of the apparatus, and water can be supplied during operation to continue the generation of water vapor.

前記制御部は、当該ヒートポンプ式蒸気生成装置の運転開始時に前記給水弁を開制御する構成であってもよい。そうすると、装置の運転開始時に給水が実行されるため、水蒸気の生成を速やかに開始できる。   The control unit may be configured to control the opening of the water supply valve at the start of operation of the heat pump steam generation device. If it does so, since water supply is performed at the time of the operation | movement start of an apparatus, the production | generation of water vapor | steam can be started rapidly.

前記蒸気生成部は、前記水蒸気分離器の水位を検出する水位検出手段と、前記給水経路に被加熱水を供給する給水ポンプとを有し、前記制御部は、当該ヒートポンプ式蒸気生成装置の運転時に前記水位検出手段の検出値に基づいて前記給水ポンプの給水量を制御する構成であってもよい。そうすると、装置の運転時に蒸気生成部の経路内で被加熱水が不足することを防止できる。   The steam generation unit includes a water level detection unit that detects a water level of the water vapor separator, and a water supply pump that supplies heated water to the water supply path, and the control unit operates the heat pump steam generation device. The structure which controls the water supply amount of the said water supply pump based on the detected value of the said water level detection means sometimes may be sufficient. If it does so, it can prevent that the to-be-heated water runs short in the path | route of a steam generation part at the time of operation | movement of an apparatus.

本発明によれば、装置の運転停止時に給水弁及び送出弁が閉制御されることで蒸気生成部の経路内が密閉されるため、装置の運転停止中に装置温度が低下し、蒸気生成部の経路内で水蒸気が凝縮して圧力が下がった場合であっても外部からの水や空気の流入が防止される。これにより、運転停止後に装置を迅速に起動させ、生成される水蒸気温度を十分に高めることができる。   According to the present invention, when the operation of the apparatus is stopped, the water supply valve and the delivery valve are controlled to be closed so that the inside of the path of the steam generation unit is sealed. Even when water vapor condenses in the path and the pressure drops, the inflow of water or air from the outside is prevented. Thereby, after an operation stop, an apparatus can be started rapidly and the water vapor | steam temperature produced | generated can fully be raised.

本発明の一実施形態に係るヒートポンプ式蒸気生成装置の全体構成図である。It is a whole lineblock diagram of the heat pump type steam generating device concerning one embodiment of the present invention. 図１に示すヒートポンプ式蒸気生成装置の制御部による制御フローの一例を示すフローチャートである。It is a flowchart which shows an example of the control flow by the control part of the heat pump type steam generation apparatus shown in FIG. 本発明の第２の実施形態に係るヒートポンプ式蒸気生成装置の全体構成図である。It is a whole block diagram of the heat pump type steam generation apparatus which concerns on the 2nd Embodiment of this invention. 図３に示すヒートポンプ式蒸気生成装置の制御部による制御フローの一例を示すフローチャートである。It is a flowchart which shows an example of the control flow by the control part of the heat pump type steam generation apparatus shown in FIG.

以下、本発明に係るヒートポンプ式蒸気生成装置について好適な実施の形態を挙げ、添付の図面を参照しながら詳細に説明する。   Hereinafter, preferred embodiments of the heat pump type steam generator according to the present invention will be described in detail with reference to the accompanying drawings.

図１は、本発明の第１の実施形態に係るヒートポンプ式蒸気生成装置１０の全体構成図である。ヒートポンプ式蒸気生成装置１０は、工場排水等の温水から排熱を回収し、回収した排熱を利用して水蒸気を生成するシステムであり、生成した水蒸気は乾燥装置や殺菌装置等の外部の蒸気利用設備に送られる。   FIG. 1 is an overall configuration diagram of a heat pump steam generation apparatus 10 according to a first embodiment of the present invention. The heat pump steam generator 10 is a system that recovers exhaust heat from hot water such as factory waste water and generates steam using the recovered exhaust heat. The generated steam is external steam such as a drying device or a sterilizer. Sent to the use facility.

図１に示すように、ヒートポンプ式蒸気生成装置１０は、水を蒸発させて水蒸気を生成し、外部へと送り出す蒸気生成部１２と、温水供給部１４によって供給される温水（熱源温水）から熱を回収し、この熱を蒸気生成部１２での蒸気生成のための熱源として供給するヒートポンプ部１６と、システムの制御を行う制御部１８とを備える。   As shown in FIG. 1, the heat pump steam generating device 10 generates heat by evaporating water to generate water vapor, and heat is generated from the hot water (heat source hot water) supplied by the hot water supply unit 14 and the hot water supply unit 14. And a heat pump unit 16 that supplies this heat as a heat source for generating steam in the steam generation unit 12, and a control unit 18 that controls the system.

ヒートポンプ部１６は、冷媒を圧縮する圧縮機２０と、圧縮機２０で圧縮された冷媒を凝縮させる凝縮器２２と、凝縮器２２を出た冷媒を減圧する膨張機構２４と、温水から熱を回収して冷媒を蒸発させる蒸発器２６とを環状に接続し、冷媒を循環させる冷凍サイクル装置である。膨張機構２４は、例えば電子膨張弁である。   The heat pump unit 16 collects heat from the hot water, the compressor 20 that compresses the refrigerant, the condenser 22 that condenses the refrigerant compressed by the compressor 20, the expansion mechanism 24 that decompresses the refrigerant that has exited the condenser 22, and Thus, the evaporator 26 that evaporates the refrigerant is connected in a ring shape to circulate the refrigerant. The expansion mechanism 24 is, for example, an electronic expansion valve.

圧縮機２０で圧縮されて高温高圧となった冷媒は、凝縮器２２で蒸気生成部１２を循環する水と熱交換して冷却され凝縮する。凝縮器２２を出た冷媒は、膨張機構２４で断熱膨張され、蒸発器２６で温水供給部１４を流れる温水から吸熱して蒸発し、圧縮機２０へと戻る。圧縮機２０は、制御部１８又は別の制御部の制御下に、その吸入側や吐出側の冷媒の圧力及び温度に基づきインバータを介してその運転回転数が制御される。   The refrigerant that has been compressed by the compressor 20 to a high temperature and high pressure is cooled and condensed by exchanging heat with the water circulating in the steam generation unit 12 in the condenser 22. The refrigerant exiting the condenser 22 is adiabatically expanded by the expansion mechanism 24, absorbs heat from the hot water flowing through the hot water supply unit 14 and evaporates by the evaporator 26, and returns to the compressor 20. The operation speed of the compressor 20 is controlled via an inverter based on the pressure and temperature of the refrigerant on the suction side and the discharge side under the control of the control unit 18 or another control unit.

蒸気生成部１２は、ヒートポンプ部１６を循環する冷媒を熱源として水を蒸発させて蒸気を生成する凝縮器２２と、凝縮器２２で生成される水蒸気と水を含む気液二相流を蒸気と水とに分離する水蒸気分離器３０と、水蒸気分離器３０で分離された蒸気を外部の蒸気利用設備へと送り出す送出経路３２と、水蒸気分離器３０で分離された水を給水経路３４から供給される被加熱水と合流させて凝縮器２２に導入する水循環経路３６と、凝縮器２２からの気液二相流を水蒸気分離器３０へと導く蒸気経路３８とを有する。水蒸気分離器３０で分離された水が流通する水循環経路３６には、水循環経路３６と給水経路３４の接続位置よりも水蒸気分離器３０側にブローダウン経路４０が接続されている。   The steam generating unit 12 uses a refrigerant circulating in the heat pump unit 16 as a heat source to evaporate water to generate steam, and a vapor-liquid two-phase flow including water vapor and water generated by the condenser 22 is converted into steam. A water vapor separator 30 that separates into water, a delivery path 32 that sends the vapor separated by the water vapor separator 30 to an external steam utilization facility, and water separated by the water vapor separator 30 are supplied from a water supply path 34. A water circulation path 36 that joins the water to be heated and introduces it into the condenser 22, and a steam path 38 that guides the gas-liquid two-phase flow from the condenser 22 to the water vapor separator 30. In the water circulation path 36 through which the water separated by the water vapor separator 30 flows, the blow-down path 40 is connected to the water vapor separator 30 side from the connection position of the water circulation path 36 and the water supply path 34.

水蒸気分離器３０は、鉛直方向に沿った円筒状容器で構成され、下端壁に接続された水循環経路３６に接続された給水経路３４から水が給水補給されることで容器内部に水を貯留する。水蒸気分離器３０には、その気相領域の圧力（蒸気圧力）を検出する圧力センサ（圧力検出手段）４１が設けられている。圧力センサ４１の検出結果は制御部１８に送られる。圧力センサ４１は蒸気生成部１２の経路内の圧力を検出できればよく、送出経路３２や蒸気経路３８に設置されてもよい。圧力センサ４１に代えて、図示しない温度センサ等の検出値から圧力を算出する圧力検出手段を用いてもよい。   The water vapor separator 30 is formed of a cylindrical container along the vertical direction, and stores water inside the container by supplying water from a water supply path 34 connected to a water circulation path 36 connected to a lower end wall. . The water vapor separator 30 is provided with a pressure sensor (pressure detection means) 41 for detecting the pressure (vapor pressure) in the gas phase region. The detection result of the pressure sensor 41 is sent to the control unit 18. The pressure sensor 41 only needs to be able to detect the pressure in the path of the steam generation unit 12, and may be installed in the delivery path 32 or the steam path 38. Instead of the pressure sensor 41, pressure detecting means for calculating the pressure from the detected value of a temperature sensor or the like (not shown) may be used.

給水経路３４は、図示しない水道管や水タンクからの水（被加熱水）を給水ポンプ４２によって水循環経路３６まで導入する。給水ポンプ４２は制御部１８によって運転制御される。給水経路３４の給水ポンプ４２よりも上流側部分には、該給水経路３４への被加熱水の供給の可否を切り替える給水弁４３が設けられている。給水弁４３は電磁弁等の開閉弁で構成され、制御部１８によって開閉制御される。   The water supply path 34 introduces water (heated water) from a water pipe or a water tank (not shown) to the water circulation path 36 by a water supply pump 42. The operation of the water supply pump 42 is controlled by the control unit 18. A water supply valve 43 that switches whether to supply heated water to the water supply path 34 is provided on the upstream side of the water supply path 42 of the water supply path 34. The water supply valve 43 is configured by an open / close valve such as an electromagnetic valve, and the open / close control is performed by the control unit 18.

水循環経路３６は、水蒸気分離器３０の下端壁から凝縮器２２までを連通する経路である。蒸気経路３８は、凝縮器２２から水蒸気分離器３０の上部側壁までを連通し、気液二相流が流通する経路である。   The water circulation path 36 is a path that communicates from the lower end wall of the water vapor separator 30 to the condenser 22. The steam path 38 is a path through which the gas-liquid two-phase flow circulates from the condenser 22 to the upper side wall of the water vapor separator 30.

送出経路３２は、水蒸気分離器３０の上端壁に接続され、蒸気経路３８から当該水蒸気分離器３０内に供給され、ここで水が分離された後の蒸気を外部に送り出す経路である。送出経路３２には、圧力調整弁４６と送出弁４７が設置されている。圧力調整弁４６は制御部１８の制御下にその開度が適宜調整されることにより、当該ヒートポンプ式蒸気生成装置１０から外部に送り出される蒸気の流量や圧力を制御する。送出弁４７は電磁弁等の開閉弁で構成され、制御部１８によって開閉制御されることで送出経路３２から外部の蒸気利用設備への蒸気の流通の可否を切り替える。送出弁４７の代わりに、圧力調整弁４６を全閉制御するようにしてもよい。   The delivery path 32 is a path that is connected to the upper end wall of the steam separator 30 and is supplied from the steam path 38 into the steam separator 30 where the steam after the water is separated is sent out to the outside. A pressure adjusting valve 46 and a delivery valve 47 are installed in the delivery path 32. The pressure adjustment valve 46 controls the flow rate and pressure of the steam sent out from the heat pump steam generation device 10 by appropriately adjusting the opening degree under the control of the control unit 18. The delivery valve 47 is composed of an on-off valve such as a solenoid valve, and is controlled to be opened and closed by the control unit 18 so as to switch whether steam is allowed to flow from the delivery path 32 to an external steam utilization facility. Instead of the delivery valve 47, the pressure adjustment valve 46 may be fully closed.

ブローダウン経路４０は、水蒸気分離器３０から水循環経路３６に流れ出た水を外部に排出する経路である。ブローダウン経路４０は、水を循環させながら水蒸気を送出経路３２へと送り出す水循環系統（水循環経路３６、蒸気経路３８及び水蒸気分離器３０）の内部でのカルシウムやシリカ等のスケール成分の濃縮防止のため、一部の水を外部に排出する経路である。ブローダウン経路４０には、外部への水の排出の可否を切り替えるブローダウン弁４８が設けられている。ブローダウン弁４８は電磁弁等の開閉弁で構成され、制御部１８によって開閉制御される。ブローダウン経路４０は、水蒸気分離器３０の液相領域に接続されてもよい。また、ブローダウン経路４０を省略してもよい。   The blow-down path 40 is a path for discharging water that has flowed from the water vapor separator 30 to the water circulation path 36 to the outside. The blow-down path 40 prevents the concentration of scale components such as calcium and silica in the water circulation system (water circulation path 36, steam path 38, and steam separator 30) that sends water vapor to the delivery path 32 while circulating water. Therefore, it is a route for discharging some water to the outside. The blow-down path 40 is provided with a blow-down valve 48 for switching whether or not water can be discharged to the outside. The blow-down valve 48 is constituted by an on-off valve such as an electromagnetic valve, and is controlled to be opened and closed by the control unit 18. The blowdown path 40 may be connected to the liquid phase region of the water vapor separator 30. Further, the blow-down path 40 may be omitted.

このような蒸気生成部１２では、水蒸気分離器３０の水面と凝縮器２２の水面との高低差により、水蒸気分離器３０から凝縮器２２へと水循環経路３６を介して水が供給されると共に、凝縮器２２で生成された水蒸気が蒸気経路３８から水蒸気分離器３０を介して送出経路３２へと送り出されるサーモサイフォン回路が形成される。その結果、水循環経路３６、蒸気経路３８及び水蒸気分離器３０で形成される水循環系統内に循環ポンプ等の動力源を設けることなく、水を循環させることができる。   In such a steam generation unit 12, water is supplied from the water vapor separator 30 to the condenser 22 via the water circulation path 36 due to a difference in height between the water surface of the water vapor separator 30 and the water surface of the condenser 22. A thermosiphon circuit is formed in which the water vapor generated in the condenser 22 is sent from the steam path 38 to the delivery path 32 via the steam separator 30. As a result, water can be circulated without providing a power source such as a circulation pump in the water circulation system formed by the water circulation path 36, the steam path 38 and the water vapor separator 30.

温水供給部１４は、蒸発器２６に温水を供給する温水供給経路１４ａと、蒸発器２６から温水を排出する温水排出経路１４ｂとを有する。温水供給経路１４ａには、外部の温水タンク等の温水供給源から供給される温水を所定の流量で送水する図示しない温水ポンプが設けられる。   The warm water supply unit 14 includes a warm water supply path 14 a that supplies warm water to the evaporator 26 and a warm water discharge path 14 b that discharges warm water from the evaporator 26. The hot water supply path 14a is provided with a hot water pump (not shown) that supplies hot water supplied from a hot water supply source such as an external hot water tank at a predetermined flow rate.

制御部１８は、圧力センサ４１の検出値に基づき給水弁４３、送出弁４７及びブローダウン弁４８の開閉制御を実行する制御装置である。より具体的には、制御部１８は、当該ヒートポンプ式蒸気生成装置１０の停止中及び通常運転中の各運転状況に応じて各弁４３，４７，４８の開閉制御を行う。制御部１８は、さらに図示しないヒートポンプ部１６の冷媒温度や冷媒圧力に基づく圧縮機２０の駆動制御や圧力調整弁４６の制御を行ってもよいが、これらは別の制御部によって制御してもよい。   The control unit 18 is a control device that performs opening / closing control of the water supply valve 43, the delivery valve 47, and the blowdown valve 48 based on the detection value of the pressure sensor 41. More specifically, the control unit 18 performs opening / closing control of the valves 43, 47, and 48 according to each operation situation during the stop and normal operation of the heat pump steam generator 10. The control unit 18 may further perform drive control of the compressor 20 and control of the pressure adjustment valve 46 based on the refrigerant temperature and refrigerant pressure of the heat pump unit 16 (not shown), but these may be controlled by another control unit. Good.

次に、以上のように構成されたヒートポンプ式蒸気生成装置１０の動作について説明する。図２は、図１に示すヒートポンプ式蒸気生成装置１０の制御部１８による制御フローの一例を示すフローチャートである。   Next, operation | movement of the heat pump type steam generation apparatus 10 comprised as mentioned above is demonstrated. FIG. 2 is a flowchart showing an example of a control flow by the control unit 18 of the heat pump type steam generator 10 shown in FIG.

図２に示すように、制御部１８は、例えば図示しない起動スイッチの操作やタイマ等に基づき、ステップＳ１において装置運転指令（運転オン指令）を受信すると（ステップＳ１のＹｅｓ）、当該ヒートポンプ式蒸気生成装置１０の運転が開始される。これにより、装置が停止中の場合は起動され、装置が運転中の場合はそのまま運転状態が継続される。   As shown in FIG. 2, when the control unit 18 receives an apparatus operation command (operation on command) in step S1 based on, for example, operation of a start switch (not shown), a timer, or the like (Yes in step S1), the heat pump steam Operation | movement of the production | generation apparatus 10 is started. Thereby, when the apparatus is stopped, it is started, and when the apparatus is in operation, the operation state is continued as it is.

制御部１８は、当該ヒートポンプ式蒸気生成装置１０の運転が実行されると、続いて圧力センサ４１による検出値である蒸気生成部１２の経路内（本実施形態では水蒸気分離器３０内）での圧力（蒸気圧力）が設定値より高いか否かを判定する（ステップＳ２）。   When the operation of the heat pump steam generation device 10 is executed, the control unit 18 continues in the path of the steam generation unit 12 (in the steam separator 30 in this embodiment), which is a detection value by the pressure sensor 41. It is determined whether or not the pressure (steam pressure) is higher than a set value (step S2).

この設定値は、当該ヒートポンプ式蒸気生成装置１０の蒸気生成部１２の経路内の圧力が、給水経路３４、送出経路３２及びブローダウン経路４０の接続先の圧力以上であるか否かを判断するための値である。例えば、給水経路３４の場合はその接続先である給水源の圧力であり、仮に大気解放されている場合は大気圧となる。同様に、送出経路３２の場合は外部の蒸気利用設備の圧力であり、ブローダウン経路４０の場合はその排水先の排水タンク等の圧力であり、いずれも大気解放の場合は大気圧となる。つまり、圧力センサ４１の検出値が設定値未満である場合は蒸気生成部１２の経路内の圧力が、給水経路３４、送出経路３２及びブローダウン経路４０の接続先の圧力未満の状態（負圧）にあり、各経路の接続先から経路内に水や空気を吸い込む可能性があり、検出値が設定値以上の場合は水や空気を吸い込む可能性がないと判断できる。   This set value determines whether or not the pressure in the path of the steam generation unit 12 of the heat pump steam generation apparatus 10 is equal to or higher than the pressure at the connection destination of the water supply path 34, the delivery path 32, and the blowdown path 40. It is a value for. For example, in the case of the water supply path 34, it is the pressure of the water supply source which is the connection destination, and when it is released to the atmosphere, it is atmospheric pressure. Similarly, in the case of the delivery path 32, it is the pressure of the external steam utilization equipment, and in the case of the blowdown path 40, it is the pressure of the drainage tank or the like of the drainage destination. That is, when the detection value of the pressure sensor 41 is less than the set value, the pressure in the path of the steam generation unit 12 is less than the pressure at the connection destination of the water supply path 34, the delivery path 32, and the blowdown path 40 (negative pressure). ), There is a possibility that water or air may be sucked into the route from the connection destination of each route, and it can be determined that there is no possibility of sucking water or air if the detected value is equal to or greater than the set value.

このようにステップＳ２での判定に用いる圧力（設定値）は、給水経路３４、送出経路３２及びブローダウン経路４０のそれぞれに個別に設定されていてよく、その場合は検出値が全ての経路の設定値以上となったか否かを判断すればよい。また、給水経路３４、送出経路３２及びブローダウン経路４０の設定値をまとめて設定する場合は、最も圧力の高い経路に合わせた設定値を設定すればよい。   As described above, the pressure (set value) used for the determination in step S2 may be set individually for each of the water supply path 34, the delivery path 32, and the blowdown path 40. In this case, the detected values are the values of all the paths. What is necessary is just to judge whether it became more than a setting value. Moreover, what is necessary is just to set the setting value according to the path | route with the highest pressure, when setting the setting value of the water supply path | route 34, the delivery path | route 32, and the blowdown path | route 40 collectively.

圧力センサ４１による検出値（蒸気圧力）が設定値以上の場合（ステップＳ２のＹｅｓ）、蒸気生成部１２の経路内に外部の水や空気が入り込む可能性がない（正圧）と判断できるため、制御部１８は通常運転を実行して（ステップＳ３）、給水弁４３、送出弁４７及びブローダウン弁４８を開制御し、ステップＳ１に戻る。   When the detection value (steam pressure) detected by the pressure sensor 41 is equal to or higher than the set value (Yes in step S2), it can be determined that there is no possibility of external water or air entering the path of the steam generation unit 12 (positive pressure). The control unit 18 performs normal operation (step S3), opens the water supply valve 43, the delivery valve 47, and the blow-down valve 48, and returns to step S1.

この通常運転では、ヒートポンプ部１６によって温水供給部１４の温水供給経路１４ａを流れる温水の熱を蒸発器２６で冷媒に回収し、冷媒に回収した熱を凝縮器２２で蒸気生成部１２の水循環経路３６を流れる被加熱水に移動させて蒸気が生成され、排熱を効率的に回収して利用し、高い省エネ性能が発揮される。この際、制御部１８の制御下に、給水弁４３及びブローダウン弁４８が開制御されることで、水循環経路３６に水が循環されると共に、水循環経路３６に給水経路３４からの被加熱水が給水ポンプ４２によって供給されて水蒸気が生成され、同時にブローダウン経路４０から一部の水が排出されることでスケール成分の濃縮が防止される。また送出弁４７が開制御されることで、外部の蒸気利用設備に生成した蒸気が供給される。   In this normal operation, the heat pump unit 16 recovers the heat of hot water flowing through the hot water supply path 14a of the hot water supply unit 14 into the refrigerant by the evaporator 26, and the heat recovered in the refrigerant is converted into the water circulation path of the steam generation unit 12 by the condenser 22. Steam is generated by being moved to the heated water flowing through 36, and exhaust heat is efficiently recovered and used, and high energy saving performance is exhibited. At this time, the water supply valve 43 and the blow-down valve 48 are controlled to be opened under the control of the control unit 18, whereby water is circulated through the water circulation path 36 and heated water from the water supply path 34 is supplied to the water circulation path 36. Is supplied by the water supply pump 42 to generate water vapor, and at the same time, a part of the water is discharged from the blow-down path 40 to prevent the concentration of the scale components. Further, when the delivery valve 47 is controlled to open, the generated steam is supplied to the external steam utilization facility.

一方、装置運転指令を受信しない場合（ステップＳ１のＮｏ）、つまり当該ヒートポンプ式蒸気生成装置１０の停止時、制御部１８は給水弁４３、送出弁４７及びブローダウン弁４８を閉制御し（ステップＳ４）、その後はステップＳ１に戻る。これにより、蒸気生成部１２の経路内が密閉されるため、装置の運転停止中に装置温度が低下し、蒸気生成部１２の経路内で水蒸気が凝縮して圧力が下がった場合であっても外部からの水や空気の流入が防止される。なお、ブローダウン経路４０を持たない構成とした場合には、ステップＳ４では給水弁４３及び送出弁４７が閉制御されることで蒸気生成部１２の経路内が密閉される。   On the other hand, when the apparatus operation command is not received (No in Step S1), that is, when the heat pump steam generation apparatus 10 is stopped, the control unit 18 controls the water supply valve 43, the delivery valve 47, and the blowdown valve 48 to be closed (Step S1). After that, the process returns to step S1. Thereby, since the inside of the path | route of the vapor | steam production | generation part 12 is sealed, even if the apparatus temperature falls during the shutdown of an apparatus, water vapor | steam condenses in the path | route of the vapor | steam production | generation part 12, and pressure falls. Inflow of water and air from the outside is prevented. In the case where the blow-down path 40 is not provided, the water supply valve 43 and the delivery valve 47 are closed in step S4 so that the path of the steam generation unit 12 is sealed.

またステップＳ２において、例えば装置の起動運転中等では蒸気生成部１２の経路内の圧力が十分に上がっておらず、圧力センサ４１による検出値（蒸気圧力）が設定値未満（負圧）となる場合がある（ステップＳ２のＮｏ）。この場合にも、蒸気生成部１２の経路内に外部の水や空気が入り込む可能性があると判断できるため、制御部１８はステップＳ４に移行して給水弁４３、送出弁４７及びブローダウン弁４８を閉制御し、その後はステップＳ１に戻る。   Further, in step S2, for example, during the start-up operation of the apparatus, the pressure in the path of the steam generation unit 12 is not sufficiently increased, and the detected value (steam pressure) by the pressure sensor 41 is less than the set value (negative pressure). (No in step S2). Also in this case, since it can be determined that there is a possibility that external water or air may enter the path of the steam generation unit 12, the control unit 18 proceeds to step S4 to supply the water supply valve 43, the delivery valve 47, and the blow-down valve. 48 is closed and thereafter the process returns to step S1.

但し、装置が運転開始された後は、生成された蒸気が送出経路３２から外部へと順次送り出されるため、送出経路３２からの水や空気の逆流の可能性は給水経路３４やブローダウン経路４０に比べて低い。そこで、例えば装置運転指令を受信した後（ステップＳ１のＹｅｓ）、圧力センサ４１の検出値が設定値未満と判定された場合には（ステップＳ２のＮｏ）、装置が運転中であることを考慮し、ステップＳ４では少なくとも給水弁４３及びブローダウン弁４８を閉制御しておけばよく、生成される蒸気を外部に送り出すために送出弁４７を開制御してもよい。   However, since the generated steam is sequentially sent out from the delivery path 32 after the operation of the apparatus is started, the possibility of reverse flow of water and air from the delivery path 32 is the water supply path 34 and the blow-down path 40. Low compared to Therefore, for example, after receiving an apparatus operation command (Yes in step S1), if the detected value of the pressure sensor 41 is determined to be less than the set value (No in step S2), it is considered that the apparatus is in operation. In step S4, at least the water supply valve 43 and the blow-down valve 48 may be closed and the delivery valve 47 may be opened to send the generated steam to the outside.

以上のように、本実施形態に係るヒートポンプ式蒸気生成装置１０では、ヒートポンプ部１６と、給水経路３４、水循環経路３６、水蒸気分離器３０及び送出経路３２を有する蒸気生成部１２と、給水経路３４及び送出経路３２にそれぞれ設けられた開閉弁である給水弁４３及び送出弁４７と、各弁４３，４７を開閉制御する制御部１８とを備え、制御部１８は当該ヒートポンプ式蒸気生成装置１０の運転停止時に各弁４３，４７を閉制御する。   As described above, in the heat pump steam generation apparatus 10 according to the present embodiment, the heat generation unit 12 including the heat pump unit 16, the water supply path 34, the water circulation path 36, the water vapor separator 30, and the delivery path 32, and the water supply path 34. And a supply valve 43 and a delivery valve 47, which are on-off valves respectively provided in the delivery path 32, and a control unit 18 that controls the opening and closing of the valves 43, 47. The control unit 18 includes the heat pump steam generator 10 The valves 43 and 47 are closed when the operation is stopped.

このように、当該ヒートポンプ式蒸気生成装置１０の運転停止時に各弁４３，４７が閉制御されることで蒸気生成部１２の経路内が密閉されるため、装置の運転停止中に装置温度が低下し、蒸気生成部１２の経路内で水蒸気が凝縮して圧力が下がった場合であっても外部からの水や空気の流入が防止される。その結果、例えば非凝縮性ガスである空気が蒸気生成部１２の経路内に入り込むことで混入したガスの分圧分だけ生成される水蒸気温度が低下すること、さらに水が入り込むことで混入した水の熱容量分だけ余分な熱量が必要となって装置起動時間が長くなることを回避できる。これにより、運転停止後に装置を迅速に起動させ、生成される水蒸気温度を十分に高めることができる。また、図１に示すように蒸気生成部１２にブローダウン経路４０を接続した構成の場合には、運転停止時にブローダウン弁４８も閉制御される。   Thus, since the inside of the path | route of the steam production | generation part 12 is sealed by each valve | bulb 43 and 47 being closed control at the time of the operation stop of the said heat pump type steam generation apparatus 10, apparatus temperature falls during the operation stop of an apparatus. And even if it is a case where water vapor | steam condenses within the path | route of the vapor | steam production | generation part 12 and a pressure falls, inflow of the water and air from the outside is prevented. As a result, for example, air that is a non-condensable gas enters the path of the steam generation unit 12, the water vapor temperature generated by the mixed gas partial pressure is lowered, and water mixed in when water enters. Therefore, it is possible to avoid an increase in the apparatus start-up time due to the extra heat required for the heat capacity. Thereby, after an operation stop, an apparatus can be started rapidly and the water vapor | steam temperature produced | generated can fully be raised. In the case where the blow-down path 40 is connected to the steam generator 12 as shown in FIG. 1, the blow-down valve 48 is also closed when the operation is stopped.

なお、給水経路３４における給水弁４３と給水ポンプ４２の設置順は逆順であってもよく、同様に送出経路３２における送出弁４７と圧力調整弁４６の設置順は逆順であってもおい。このような逆順とすると、給水ポンプ４２及び圧力調整弁４６での水や空気の流入を確実に防止できるため、装置の運転停止中の密閉度をより向上させることができる。   In addition, the order of installation of the water supply valve 43 and the water supply pump 42 in the water supply path 34 may be reversed, and similarly, the order of installation of the delivery valve 47 and the pressure adjustment valve 46 in the delivery path 32 may be reversed. In such a reverse order, the inflow of water and air at the water supply pump 42 and the pressure regulating valve 46 can be reliably prevented, so that the sealing degree during the operation stop of the apparatus can be further improved.

制御部１８は、当該ヒートポンプ式蒸気生成装置１０の運転時に圧力センサ４１の検出値に基づいて各弁４３，４７，４８を開制御する。これにより、装置の運転時における蒸気生成部１２の経路内での圧力に応じて送出弁４７を開制御することで生成される水蒸気を送出経路３２から外部へと送り出すことができ、また給水弁４３を開制御することで運転時に給水を確実に行って水蒸気の生成を継続することができ、さらにブローダウン弁４８を開制御することでブローダウン経路４０からの水の排出を行うことができる。   The control unit 18 controls the valves 43, 47, and 48 to open based on the detection value of the pressure sensor 41 during operation of the heat pump steam generator 10. Thereby, the water vapor generated by controlling the opening of the delivery valve 47 according to the pressure in the path of the steam generation unit 12 during operation of the apparatus can be sent out from the delivery path 32 to the outside, and the water supply valve By controlling the opening 43, water can be reliably supplied during operation to continue the generation of water vapor, and by controlling the opening of the blow-down valve 48, water can be discharged from the blow-down path 40. .

制御部１８は、当該ヒートポンプ式蒸気生成装置１０の運転開始後、圧力センサ４１の検出値が設定値未満である場合は（ステップＳ２のＮｏ）、少なくとも給水経路３４及びブローダウン経路４０の各弁４３，４８を閉制御しておき、圧力センサ４１の検出値が設定値以上となった場合に（ステップＳ２のＹｅｓ）、給水経路３４及びブローダウン経路４０の各弁４３，４８を開制御する。これにより、運転停止中の水や空気の混入をより確実に防止しつつ、運転開始後には経路内の圧力状態に基づくより適切なタイミングで各弁４３，４８を開制御することができる。すなわち、当該ヒートポンプ式蒸気生成装置１０では、装置の運転停止中は各弁４３，４７，４８が閉制御されることで蒸気生成部１２の経路内が負圧になっており、その後の運転開始時にすぐに各弁４３，４７，４８を開いてしまうと瞬時に外部の水や空気を吸い込んでしまう懸念がある。そこで、圧力センサ４１の検出値によって経路内が正圧になったことを検知してから少なくとも給水弁４３及びブローダウン弁４８を開制御することで起動時の水や空気の混入を防止して、速やかな起動が可能となる。但し、給水弁４３については装置の運転開始時に開制御してもよい。この給水弁４３が設けられる給水経路３４には給水ポンプ４２があり、その回転数が制御されることで運転開始時の圧力差によって過度に被加熱水が流入することが防止されるからである。   When the detected value of the pressure sensor 41 is less than the set value after the operation of the heat pump steam generating device 10 is started (No in step S2), the control unit 18 at least each valve of the water supply path 34 and the blow-down path 40. 43 and 48 are closed, and when the detected value of the pressure sensor 41 is equal to or higher than the set value (Yes in step S2), the valves 43 and 48 of the water supply path 34 and the blow-down path 40 are opened. . Accordingly, the valves 43 and 48 can be controlled to open at a more appropriate timing based on the pressure state in the path after the operation is started, more reliably preventing water and air from being stopped during the operation stop. That is, in the heat pump steam generation apparatus 10, the valves 43, 47, and 48 are closed and controlled while the operation of the apparatus is stopped, so that the pressure in the path of the steam generation unit 12 is negative, and the subsequent operation starts. If the valves 43, 47, and 48 are opened immediately, there is a concern that water or air outside may be sucked in instantaneously. Therefore, by detecting that the pressure in the path has become positive based on the detection value of the pressure sensor 41, at least the water supply valve 43 and the blow-down valve 48 are controlled to prevent mixing of water and air at startup. , Prompt start-up becomes possible. However, the water supply valve 43 may be controlled to open at the start of operation of the apparatus. This is because there is a water supply pump 42 in the water supply path 34 provided with the water supply valve 43, and the rotation speed of the water supply pump 42 is controlled to prevent the heated water from flowing in excessively due to the pressure difference at the start of operation. .

図３は、本発明の第２の実施形態に係るヒートポンプ式蒸気生成装置１０Ａの全体構成図である。この第２の実施形態に係るヒートポンプ式蒸気生成装置１０Ａにおいて、上記第１の実施形態に係るヒートポンプ式蒸気生成装置１０と同一又は同様な機能及び効果を奏する要素には同一の参照符号を付し、詳細な説明を省略する。   FIG. 3 is an overall configuration diagram of a heat pump type steam generator 10A according to the second embodiment of the present invention. In the heat pump steam generating apparatus 10A according to the second embodiment, elements having the same or similar functions and effects as those of the heat pump steam generating apparatus 10 according to the first embodiment are denoted by the same reference numerals. Detailed description will be omitted.

図３に示すように、このヒートポンプ式蒸気生成装置１０Ａは、図１に示すヒートポンプ式蒸気生成装置１０と比べて、水蒸気分離器３０の液相領域の水位を検出する水位センサ（水位検出手段）５０を備える。水位センサ５０の検出結果は制御部１８に送られる。   As shown in FIG. 3, the heat pump type steam generator 10 </ b> A has a water level sensor (water level detection means) that detects the water level in the liquid phase region of the water vapor separator 30 as compared with the heat pump type steam generator 10 shown in FIG. 1. 50. The detection result of the water level sensor 50 is sent to the control unit 18.

次に、以上のように構成されたヒートポンプ式蒸気生成装置１０Ａの動作について説明する。図４は、図３に示すヒートポンプ式蒸気生成装置１０Ａの制御部１８による制御フローの一例を示すフローチャートである。   Next, operation | movement of 10 A of heat pump type steam generators comprised as mentioned above is demonstrated. FIG. 4 is a flowchart illustrating an example of a control flow by the control unit 18 of the heat pump steam generating apparatus 10A illustrated in FIG.

図４に示すように、制御部１８は、例えば図示しない起動スイッチの操作やタイマ等に基づき、ステップＳ１１において装置運転指令（運転オン指令）を受信すると（ステップＳ１１のＹｅｓ）、当該ヒートポンプ式蒸気生成装置１０Ａの運転が開始される。これにより、装置が停止中の場合は起動され、装置が運転中の場合はそのまま運転状態が継続される。   As shown in FIG. 4, when the control unit 18 receives an apparatus operation command (operation on command) in step S11 based on, for example, operation of a start switch (not shown), a timer, or the like (Yes in step S11), the heat pump steam Operation | movement of 10 A of production | generation apparatuses is started. Thereby, when the apparatus is stopped, it is started, and when the apparatus is in operation, the operation state is continued as it is.

制御部１８は、当該ヒートポンプ式蒸気生成装置１０Ａの運転が実行されると、続いて給水弁４３を開制御する（ステップＳ１２）。この際、ヒートポンプ式蒸気生成装置１０Ａが起動時である場合は、蒸気生成部１２の経路内が負圧である場合があり、給水経路３４からの被加熱水が流入するが、給水ポンプ４２の回転数が制御されているため運転開始時の圧力差によって過度に被加熱水が流入することはない。   When the operation of the heat pump steam generator 10A is executed, the controller 18 subsequently controls the water supply valve 43 to open (step S12). At this time, when the heat pump steam generating device 10A is at the time of start-up, the inside of the path of the steam generating unit 12 may have a negative pressure, and heated water from the water supply path 34 flows in, but the water supply pump 42 Since the rotational speed is controlled, the heated water does not flow excessively due to the pressure difference at the start of operation.

次いで、圧力センサ４１による検出値である蒸気生成部１２の経路内（本実施形態では水蒸気分離器３０内）での圧力（蒸気圧力）が設定値より高いか否かを判定する（ステップＳ１３）。このステップＳ１３の判定は、図２に示すステップＳ２の判定と同様でよい。   Next, it is determined whether or not the pressure (steam pressure) in the path of the steam generation unit 12 (in this embodiment, the steam separator 30), which is a detected value by the pressure sensor 41, is higher than a set value (step S13). . The determination in step S13 may be the same as the determination in step S2 shown in FIG.

圧力センサ４１による検出値（蒸気圧力）が設定値以上の場合（ステップＳ１３のＹｅｓ）、蒸気生成部１２の経路内に外部の水や空気が入り込む可能性がない（正圧）と判断できるため、制御部１８は通常運転を実行して（ステップＳ１４）、送出弁４７及びブローダウン弁４８を開制御し、ステップＳ１１に戻る。このステップＳ１４の通常運転は図２に示すステップＳ３の通常運転と同様でよい。なお、当該ヒートポンプ式蒸気生成装置１０Ａでは水位センサ５０を有するため、制御部１８は、運転時に水位センサ５０の検出値に基づいて給水ポンプ４２の給水量を制御することで、蒸気生成部１２の経路内への給水の補充量を適切に制御できる。この水位センサ５０の検出値に基づく給水ポンプ４２の回転数制御は、例えばＰＩＤ制御その他任意のフィードバック制御を用いて行ってもよい。   If the detection value (steam pressure) detected by the pressure sensor 41 is equal to or higher than the set value (Yes in step S13), it can be determined that there is no possibility of external water or air entering the path of the steam generation unit 12 (positive pressure). Then, the control unit 18 performs normal operation (step S14), opens the delivery valve 47 and the blowdown valve 48, and returns to step S11. The normal operation in step S14 may be the same as the normal operation in step S3 shown in FIG. In addition, since the heat pump steam generation device 10A includes the water level sensor 50, the control unit 18 controls the water supply amount of the water supply pump 42 based on the detection value of the water level sensor 50 during operation, so that the steam generation unit 12 The replenishment amount of water supply in the route can be appropriately controlled. The rotational speed control of the water supply pump 42 based on the detection value of the water level sensor 50 may be performed using, for example, PID control or any other feedback control.

一方、装置運転指令を受信しない場合（ステップＳ１１のＮｏ）、つまり当該ヒートポンプ式蒸気生成装置１０Ａの停止時、制御部１８は給水弁４３、送出弁４７及びブローダウン弁４８を閉制御し（ステップＳ１５）、その後はステップＳ１に戻る。これにより、蒸気生成部１２の経路内が密閉されるため、装置の運転停止中に装置温度が低下し、蒸気生成部１２の経路内で水蒸気が凝縮して圧力が下がった場合であっても外部からの水や空気の流入が防止される。なお、ブローダウン経路４０を持たない構成とした場合には、ステップＳ４では給水弁４３及び送出弁４７が閉制御されることで蒸気生成部１２の経路内が密閉される。   On the other hand, when the apparatus operation command is not received (No in Step S11), that is, when the heat pump steam generating apparatus 10A is stopped, the control unit 18 controls the water supply valve 43, the delivery valve 47, and the blowdown valve 48 to be closed (Step S11). After that, the process returns to step S1. Thereby, since the inside of the path | route of the vapor | steam production | generation part 12 is sealed, even if the apparatus temperature falls during the shutdown of an apparatus, water vapor | steam condenses in the path | route of the vapor | steam production | generation part 12, and pressure falls. Inflow of water and air from the outside is prevented. In the case where the blow-down path 40 is not provided, the water supply valve 43 and the delivery valve 47 are closed in step S4 so that the path of the steam generation unit 12 is sealed.

またステップＳ１３において、例えば装置の起動運転中等では蒸気生成部１２の経路内の圧力が十分に上がっておらず、圧力センサ４１による検出値（蒸気圧力）が設定値未満（負圧）となる場合がある（ステップＳ１３２のＮｏ）。この場合には、蒸気生成部１２の経路内に外部の水や空気が入り込む可能性があると判断できるため、ステップＳ１１に戻り、上記と同様な制御フローを実行する。   Further, in step S13, for example, during the start-up operation of the apparatus, the pressure in the path of the steam generation unit 12 is not sufficiently increased, and the detected value (steam pressure) by the pressure sensor 41 is less than the set value (negative pressure). (No in step S132). In this case, since it can be determined that there is a possibility that external water or air may enter the path of the steam generation unit 12, the process returns to step S11, and a control flow similar to the above is executed.

なお、本発明は、上記した実施形態に限定されるものではなく、本発明の主旨を逸脱しない範囲で自由に変更できることは勿論である。   It should be noted that the present invention is not limited to the above-described embodiment, and it is needless to say that the present invention can be freely changed without departing from the gist of the present invention.

例えば上記実施形態では、給水弁４３、送出弁４７及びブローダウン弁４８を電動弁で構成し、制御部１８によって開閉制御するものとしたが、これら各弁４３，４７，４８は逆止弁で構成されてもよい。   For example, in the above embodiment, the water supply valve 43, the delivery valve 47, and the blow-down valve 48 are constituted by electric valves and controlled to be opened and closed by the control unit 18, but these valves 43, 47, 48 are check valves. It may be configured.

１０，１０Ａ ヒートポンプ式蒸気生成装置
１２ 蒸気生成部
１４ 温水供給部
１６ ヒートポンプ部
１８ 制御部
２０ 圧縮機
２２ 凝縮器
２４ 膨張機構
２６ 蒸発器
３０ 水蒸気分離器
３２ 送出経路
３４ 給水経路
３６ 水循環経路
３８ 蒸気経路
４０ ブローダウン経路
４１ 圧力センサ
４２ 給水ポンプ
４３ 給水弁
４６ 圧力調整弁
４７ 送出弁
４８ ブローダウン弁
５０ 水位センサ DESCRIPTION OF SYMBOLS 10,10A Heat pump type steam generator 12 Steam generation part 14 Hot water supply part 16 Heat pump part 18 Control part 20 Compressor 22 Condenser 24 Expansion mechanism 26 Evaporator 30 Steam separator 32 Delivery path 34 Water supply path 36 Water circulation path 38 Steam path 40 Blow-down path 41 Pressure sensor 42 Water supply pump 43 Water supply valve 46 Pressure adjustment valve 47 Delivery valve 48 Blow-down valve 50 Water level sensor

Claims (9)

冷媒を圧縮する圧縮機と、該圧縮機で圧縮された冷媒を凝縮させる凝縮器と、該凝縮器を出た冷媒を減圧する膨張機構と、外部熱源から回収した熱で冷媒を蒸発させる蒸発器とを環状に接続したヒートポンプ部と、
被加熱水を前記冷媒によって加熱する前記凝縮器、前記凝縮器で生成された気液二相流が流通する蒸気経路、該蒸気経路から供給される気液二相流を水と水蒸気とに分離する水蒸気分離器、該水蒸気分離器で分離された水蒸気を分離した水を前記凝縮器に流通させる水循環経路、該水循環経路に接続され、給水ポンプの動力によって前記被加熱水を供給する給水経路及び前記水蒸気分離器で分離された水蒸気を外部に送り出す送出経路を有する蒸気生成部と、
を備えるヒートポンプ式蒸気生成装置であって、
前記給水経路を開閉可能とする給水経路開閉手段と、前記送出経路を開閉可能とする送出経路開閉手段と、該給水経路開閉手段及び該送出経路開閉手段を開閉制御する制御部とを備え、
前記制御部は、当該ヒートポンプ式蒸気生成装置の運転停止により前記蒸気生成部の経路内の圧力が下がり大気圧以下となる運転停止中は前記給水経路開閉手段及び前記送出経路開閉手段の閉制御を維持することを特徴とするヒートポンプ式蒸気生成装置。 A compressor that compresses the refrigerant; a condenser that condenses the refrigerant compressed by the compressor; an expansion mechanism that depressurizes the refrigerant that has exited the condenser; and an evaporator that evaporates the refrigerant with heat recovered from an external heat source A heat pump unit connected in a ring shape,
The condenser that heats water to be heated by the refrigerant, a vapor path through which a gas-liquid two-phase flow generated in the condenser flows, and a gas-liquid two-phase flow supplied from the vapor path is separated into water and water vapor A water vapor separator, a water circulation path through which water separated from the water vapor separated by the water vapor separator is circulated, a water supply path connected to the water circulation path and supplying the heated water by the power of a water feed pump, and A steam generator having a delivery path for sending out the steam separated by the steam separator to the outside;
A heat pump type steam generator comprising:
A water supply path opening / closing means capable of opening / closing the water supply path, a delivery path opening / closing means capable of opening / closing the delivery path, a water supply path opening / closing means and a control unit for controlling the opening / closing of the delivery path opening / closing means,
Wherein the control unit, the closing control of the heat pump the vapor the water supply passage controlling means during operation stop pressure is lowered equal to or lower than the atmospheric pressure in the path of the generator and the delivery channel switching means by the operation stop of the steam generator A heat pump type steam generator characterized by maintaining . 請求項１に記載のヒートポンプ式蒸気生成装置において、
前記蒸気生成部は、蒸気圧力を検出する圧力検出手段を有し、
前記制御部は、当該ヒートポンプ式蒸気生成装置の運転時に前記圧力検出手段の検出値に基づいて前記送出経路開閉手段を開制御することを特徴とするヒートポンプ式蒸気生成装置。 In the heat pump type steam generator according to claim 1,
The steam generation unit has pressure detection means for detecting a steam pressure,
The heat pump steam generation device, wherein the control unit opens the delivery path opening / closing means based on a detection value of the pressure detection means during operation of the heat pump steam generation device. 冷媒を圧縮する圧縮機と、該圧縮機で圧縮された冷媒を凝縮させる凝縮器と、該凝縮器を出た冷媒を減圧する膨張機構と、外部熱源から回収した熱で冷媒を蒸発させる蒸発器とを環状に接続したヒートポンプ部と、
被加熱水を前記冷媒によって加熱する前記凝縮器、前記凝縮器で生成された気液二相流が流通する蒸気経路、該蒸気経路から供給される気液二相流を水と水蒸気とに分離する水蒸気分離器、該水蒸気分離器で分離された水蒸気を分離した水を前記凝縮器に流通させる水循環経路、該水循環経路に接続され、給水ポンプの動力によって前記被加熱水を供給する給水経路及び前記水蒸気分離器で分離された水蒸気を外部に送り出す送出経路を有する蒸気生成部と、
を備えるヒートポンプ式蒸気生成装置であって、
前記給水経路を開閉可能とする給水経路開閉手段を開閉制御する制御部と、
前記送出経路に設けられ、外部から前記水蒸気分離器への逆流を防止する逆止弁と、
を備え、
前記制御部は、当該ヒートポンプ式蒸気生成装置の運転停止により前記蒸気生成部の経路内の圧力が下がり大気圧以下となる運転停止中は前記給水経路開閉手段の閉制御を維持することを特徴とするヒートポンプ式蒸気生成装置。 A compressor that compresses the refrigerant; a condenser that condenses the refrigerant compressed by the compressor; an expansion mechanism that depressurizes the refrigerant that has exited the condenser; and an evaporator that evaporates the refrigerant with heat recovered from an external heat source A heat pump unit connected in a ring shape,
The condenser that heats water to be heated by the refrigerant, a vapor path through which a gas-liquid two-phase flow generated in the condenser flows, and a gas-liquid two-phase flow supplied from the vapor path is separated into water and water vapor A water vapor separator, a water circulation path through which water separated from the water vapor separated by the water vapor separator is circulated, a water supply path connected to the water circulation path and supplying the heated water by the power of a water feed pump, and A steam generator having a delivery path for sending out the steam separated by the steam separator to the outside;
A heat pump type steam generator comprising:
A control unit that controls opening and closing of the water supply path opening and closing means that enables the water supply path to be opened and closed;
A check valve provided in the delivery path to prevent backflow from the outside to the water vapor separator;
With
The control unit maintains the closed control of the water supply path opening / closing means during operation stop when the pressure in the path of the steam generation unit decreases and becomes atmospheric pressure or less due to the operation stop of the heat pump steam generation device. A heat pump steam generator. 請求項１〜３のいずれか１項に記載のヒートポンプ式蒸気生成装置において、
前記蒸気生成部は、蒸気圧力を検出する圧力検出手段を有し、
前記制御部は、当該ヒートポンプ式蒸気生成装置の運転時に前記圧力検出手段の検出値に基づいて前記給水経路開閉手段を開制御することを特徴とするヒートポンプ式蒸気生成装置。 In the heat pump type steam generator according to any one of claims 1 to 3,
The steam generation unit has pressure detection means for detecting a steam pressure,
The controller is configured to open-control the water supply path opening / closing means based on a detection value of the pressure detecting means during operation of the heat pump steam generating apparatus. 請求項１〜３のいずれか１項に記載のヒートポンプ式蒸気生成装置において、
前記制御部は、当該ヒートポンプ式蒸気生成装置の運転開始時に前記給水経路開閉手段を開制御することを特徴とするヒートポンプ式蒸気生成装置。 In the heat pump type steam generator according to any one of claims 1 to 3,
The said control part controls opening of the said water supply path | route opening / closing means at the time of the driving | operation start of the said heat pump type steam generation apparatus, The heat pump type steam generation apparatus characterized by the above-mentioned. 請求項５に記載のヒートポンプ式蒸気生成装置において、
前記蒸気生成部は、前記水蒸気分離器の水位を検出する水位検出手段を有し、
前記制御部は、当該ヒートポンプ式蒸気生成装置の運転時に前記水位検出手段の検出値に基づいて前記給水ポンプの給水量を制御することを特徴とするヒートポンプ式蒸気生成装置。 In the heat pump type steam generator according to claim 5,
The steam generation unit has water level detection means for detecting the water level of the water vapor separator,
The said control part controls the amount of water supply of the said water supply pump based on the detected value of the said water level detection means at the time of the operation | movement of the said heat pump type steam generation apparatus, The heat pump type steam generation apparatus characterized by the above-mentioned. 請求項１〜６のいずれか１項に記載のヒートポンプ式蒸気生成装置において、
前記水蒸気分離器の液相領域又は前記水循環経路に接続され、外部に水を排出するブローダウン経路、及び該ブローダウン経路を開閉可能とするブローダウン経路開閉手段を備え、
前記制御部は、当該ヒートポンプ式蒸気生成装置の運転停止時に、前記ブローダウン経路開閉手段を閉制御することを特徴とするヒートポンプ式蒸気生成装置。 In the heat pump type steam generator according to any one of claims 1 to 6,
A blowdown path connected to the liquid phase region of the water vapor separator or the water circulation path and discharging water to the outside, and a blowdown path opening / closing means capable of opening and closing the blowdown path ;
Wherein, when the operation stop of the heat pump type steam generator, a heat pump type steam generating device which is characterized that you closing control the blowdown passage controlling means. 請求項１〜６のいずれか１項に記載のヒートポンプ式蒸気生成装置において、
前記水蒸気分離器の液相領域又は前記水循環経路に接続され、外部に水を排出するブローダウン経路、及び該ブローダウン経路に設けられ、外部から前記水蒸気分離器の液相領域又は前記水循環経路への逆流を防止する逆止弁を備えることを特徴とするヒートポンプ式蒸気生成装置。 In the heat pump type steam generator according to any one of claims 1 to 6,
A blowdown path connected to the liquid phase region of the steam separator or the water circulation path and discharging water to the outside, and provided in the blowdown path, from the outside to the liquid phase area of the steam separator or the water circulation path A heat pump type steam generator characterized by comprising a check valve for preventing backflow of water. 請求項７に記載のヒートポンプ式蒸気生成装置において、
前記蒸気生成部は、蒸気圧力を検出する圧力検出手段を有し、
前記制御部は、当該ヒートポンプ式蒸気生成装置の運転時に前記圧力検出手段の検出値に基づいて前記ブローダウン経路開閉手段を開制御することを特徴とするヒートポンプ式蒸気生成装置。 In the heat pump type steam generator according to claim 7,
The steam generation unit has pressure detection means for detecting a steam pressure,
The said control part is the heat pump type steam generation apparatus characterized by opening-controlling the said blowdown path | route opening / closing means based on the detected value of the said pressure detection means at the time of the operation | movement of the said heat pump type steam generation apparatus.
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