JP5841858B2 - Hot water heater - Google Patents

Hot water heater Download PDF

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JP5841858B2
JP5841858B2 JP2012031743A JP2012031743A JP5841858B2 JP 5841858 B2 JP5841858 B2 JP 5841858B2 JP 2012031743 A JP2012031743 A JP 2012031743A JP 2012031743 A JP2012031743 A JP 2012031743A JP 5841858 B2 JP5841858 B2 JP 5841858B2
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hot water
circulation pump
rotation
speed
pump
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JP2013167416A (en
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正巳 山口
正巳 山口
貢也 長谷川
貢也 長谷川
瑛一 白井
瑛一 白井
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Corona Corp
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Description

この発明は、熱源と熱交換することにより熱流体を加熱して循環させる温水暖房装置に関するものである。   The present invention relates to a hot water heater that heats and circulates a thermal fluid by exchanging heat with a heat source.

従来からこの種のものに於いては、熱流体の循環路が密閉されていない開放式及び半密閉式と、熱流体の循環路が密閉されている密閉式とがあった。（特許文献１及び特許文献２参照）
又、浴槽の湯水を循環ポンプにより取り出し循環するふろ循環装置の循環ポンプの停止時の制御として、循環ポンプが運転停止する時、循環ポンプの回転を高速回転からいったん所定の低速回転へ下降後、所定の時間だけ低速回転してから停止させるものがあった。（特許文献３参照） Conventionally, in this type, there are an open type and a semi-sealed type in which the circulation path of the thermal fluid is not sealed, and a sealed type in which the circulation path of the thermal fluid is sealed. (See Patent Document 1 and Patent Document 2)
In addition, as a control at the time of stopping the circulation pump of the bath circulation device that takes out and circulates the hot water in the bathtub, when the circulation pump stops operating, the rotation of the circulation pump is once lowered from the high speed rotation to the predetermined low speed rotation, Some of them stopped after rotating at a low speed for a predetermined time. (See Patent Document 3)

特開平７−２８０２８８号公報JP-A-7-280288 特開平９−５３８３３号公報JP-A-9-53833 特開２００１−２４８８９７号公報JP 2001-248897 A

ところでこの従来のものでは、温水暖房装置ではふろ循環装置に比べて高流量が必要であり、そのため循環ポンプの回転数もふろ循環装置に比べて高く設定されている。
そこで例えば施工時のエアー抜き作業が不十分だったり、温水循環路に設置されているエアーセパレータによる熱流体内の混入空気の分離が不十分だったりして、温水循環路内に空気が混入していた場合、温水暖房装置では温水暖房運転中は吐出圧が高いため混入していた空気が圧縮され、その圧縮された分膨張タンクから熱流体が温水循環路内に補充されていた。 By the way, in this conventional one, the hot water heating device requires a higher flow rate than the bath circulation device, and therefore, the rotational speed of the circulation pump is set higher than that of the bath circulation device.
Therefore, for example, air is not mixed in the hot water circulation path due to insufficient air venting during construction or insufficient separation of the mixed air in the thermal fluid by the air separator installed in the hot water circulation path. In such a case, in the hot water heating apparatus, the mixed air is compressed during the hot water heating operation because the discharge pressure is high, and the hot fluid is replenished from the expansion tank into the hot water circulation path.

この状態で温水暖房運転を終了して循環ポンプが停止すると、圧縮されていた空気が急激に膨張し、温水循環路に設けられている圧力安全弁が作動してしまうこととなり、特許文献３のように循環ポンプの回転を高速回転からいったん所定の低速回転へ下降後、所定の時間だけ低速回転してから停止させただけでは、この圧縮されていた空気が急激に膨張するのを防止することはできなかった。   When the hot water heating operation is finished in this state and the circulation pump is stopped, the compressed air is rapidly expanded, and the pressure safety valve provided in the hot water circulation path is operated. If the rotation of the circulating pump is once lowered from a high speed to a predetermined low speed and then stopped at a low speed for a predetermined time and then stopped, it is possible to prevent the compressed air from rapidly expanding. could not.

この発明は上記課題を解決するために、特に請求項１ではその構成を、熱源機と、熱交換器と、放熱器と、前記熱交換器と前記放熱器とを接続する温水循環路と、前記温水循環路に設けられた圧力安全弁と、前記温水循環路に設けられた循環ポンプと、前記温水循環路に設けられた密閉式膨張タンクと、タイマー部を有する制御部とを備え、前記熱交換器にて前記熱源機と熱交換して加熱された熱流体を前記循環ポンプにて前記放熱器へ循環させる密閉式の温水暖房装置に於いて、前記制御部は温水暖房運転を停止する時、前記循環ポンプの回転数が予め設定した回転停止回転数より高い時は、前記循環ポンプの回転数を所定回転数小さくしてその状態で所定時間回転させる動作を、前記循環ポンプの回転数が前記回転停止回転数以下になるまで繰り返し、前記所定回転数は、前記循環ポンプの回転数を所定回転数小さくしてその状態で所定時間回転させる動作を繰り返す度に大きく設定され、前記循環ポンプの回転数が前記回転停止回転数以下になった時に前記循環ポンプを停止するものである。 In order to solve the above-described problems, the present invention particularly has a configuration according to claim 1, in which a heat source unit, a heat exchanger, a radiator, a hot water circulation path connecting the heat exchanger and the radiator, A pressure safety valve provided in the hot water circulation path, a circulation pump provided in the hot water circulation path, a sealed expansion tank provided in the hot water circulation path, and a control unit having a timer unit, wherein at the heat source machine heat exchanger to heat thermal fluid to the hot water heating system in sealable circulating into the radiator at the circulation pump at exchanger, the control unit when stopping the water heating operation when higher speed is preset rotation stop rotation speed of the circulation pump, the operation of rotating a predetermined time the rotational speed in this state by a predetermined number of revolutions smaller of the circulation pump, the rotational speed of the circulating pump equal to or less than the rotation stop rotation speed Repeated at the predetermined rotational speed, the rotational speed of the circulation pump by a predetermined number of revolutions smaller set larger every time repeating the operation of rotating in this state a predetermined time, the rotation stop rotation speed is the rotation speed of the circulation pump it is intended to stop the circulation pump when it becomes less.

この発明の請求項１によれば、温水暖房運転を停止する時、循環ポンプの回転数が予め設定した回転停止回転数より高い時は、循環ポンプの回転数を所定回転数小さくしてその状態で所定時間回転させる動作を、循環ポンプの回転数が回転停止回転数以下になるまで繰り返し、循環ポンプの回転数が回転停止回転数以下になった時に循環ポンプを停止するので、温水循環路内の圧縮されていた空気が急激に膨張して温水循環路に設けられている圧力安全弁が作動してしまうのを防止できるものである。   According to the first aspect of the present invention, when the hot water heating operation is stopped, when the rotation speed of the circulation pump is higher than the rotation stop rotation speed set in advance, the rotation speed of the circulation pump is reduced by a predetermined rotation speed, The operation of rotating for a predetermined time is repeated until the rotation speed of the circulation pump becomes equal to or less than the rotation stop rotation speed, and the circulation pump is stopped when the rotation speed of the circulation pump becomes equal to or less than the rotation stop rotation speed. Thus, it is possible to prevent the compressed air from expanding rapidly and the pressure safety valve provided in the hot water circulation path from operating.

また、所定回転数は、循環ポンプの回転数を所定回転数小さくしてその状態で所定時間回転させる動作を繰り返す度に大きく設定されているので、温水循環路内の圧縮されていた空気が一番圧縮されている状態で循環ポンプ７の回転数を小さくすることによる膨張を小さくし、ある程度圧縮されていた空気が膨張したら循環ポンプの回転数を下げる度合いを大きくして、確実に温水循環路内の圧縮されていた空気が急激に膨張して温水循環路に設けられている圧力安全弁が作動してしまうのを防止しつつ、循環ポンプを停止するまでの時間を短くすることができるものである。 Further, Jo Tokoro rotational speed, since the rotation speed of the circulation pump is set larger every time repeating the operation of rotating a predetermined time in this state by a predetermined number of revolutions reduced, the air which has been compressed in the hot water circulation path The expansion by reducing the rotation speed of the circulation pump 7 in the most compressed state is reduced, and when the compressed air is expanded to some extent, the degree of lowering the rotation speed of the circulation pump is increased to ensure the hot water circulation. It is possible to shorten the time until the circulation pump is stopped while preventing the compressed air in the passage from expanding suddenly and operating the pressure safety valve provided in the hot water circulation passage It is.

この発明の一実施形態の温水暖房装置の概略構成図。BRIEF DESCRIPTION OF THE DRAWINGS The schematic block diagram of the hot water heating apparatus of one Embodiment of this invention. 同温水暖房運転停止時の循環ポンプ制御のフローチャート図。The flowchart figure of the circulation pump control at the time of the same hot water heating operation stop.

次にこの発明の一実施形態の温水暖房装置を図１に基づき説明する。
１は密閉式の温水暖房装置本体で、装置本体１内に燃焼器からなる熱源機２と熱交換器３とを内蔵した缶体４と、該缶体４の上部に設けられ熱交換器３の流入側に接続されている流入バルブ５と、同じく缶体４の上部に設けられ熱交換器３の流出側に接続されている流出バルブ６と、缶体４内で加熱されて流出バルブ６を通過した熱流体を循環させる循環ポンプ７と、該循環ポンプ７の流入側に設けた圧力安全弁８とを内蔵している。 Next, a hot water heater according to an embodiment of the present invention will be described with reference to FIG.
Reference numeral 1 denotes a sealed hot water heater main body, a can body 4 having a heat source device 2 composed of a combustor and a heat exchanger 3 built in the main body 1, and a heat exchanger 3 provided on the upper portion of the can body 4. An inflow valve 5 connected to the inflow side of the heat exchanger 3, an outflow valve 6 provided on the top of the can body 4 and connected to the outflow side of the heat exchanger 3, and the outflow valve 6 heated in the can body 4. A circulation pump 7 that circulates the thermal fluid that has passed through the pressure pump and a pressure safety valve 8 provided on the inflow side of the circulation pump 7 are incorporated.

更に装置本体１内には、温水循環路内の圧力を検知して表示する圧力計９と、温水循環路内の熱流体に空気が混入していた場合その空気と熱流体を分離するエアーセパレータ１０と、該エアーセパレータ１０の上部に接続して設けられ分離された空気を温水循環路外へ排出する空気抜き弁１１と、エアーセパレータ１０の下部に接続して設けられその内部はダイアフラム１２により上下に分割され、空気が分離された熱流体をタンク内に溜める密閉式膨張タンク１３とを内蔵し、この装置本体１に外部に設けた放熱器１４を接続して密閉式の温水暖房システムを構成していた。   Further, in the apparatus main body 1, a pressure gauge 9 that detects and displays the pressure in the hot water circulation path, and an air separator that separates the air and the thermal fluid when the thermal fluid in the hot water circulation path is mixed with air. 10, an air vent valve 11 that is connected to the upper part of the air separator 10 and exhausts the separated air to the outside of the hot water circulation path, and is connected to the lower part of the air separator 10, and the inside thereof is vertically moved by a diaphragm 12. A sealed expansion tank 13 for storing a thermal fluid separated into air and storing the air in the tank is built in, and a radiator 14 provided outside is connected to the apparatus body 1 to constitute a sealed hot water heating system. Was.

１５は温水循環路に設けられ充填時に閉じられる充填バルブで、充填バルブ１５の流入側に設けられた接続部１６と流出側に設けられた接続部１７には、熱流体を循環路内に圧送するパワーシスターン（図示せず）を接続するものである。   A filling valve 15 is provided in the hot water circulation path and is closed at the time of filling. The connecting part 16 provided on the inflow side and the connection part 17 provided on the outflow side of the filling valve 15 are supplied with hot fluid into the circulation path. A power system (not shown) is connected.

１８は温水暖房装置本体１を制御する制御部で、時間を計時するタイマー部１９を備えたものである。   Reference numeral 18 denotes a control unit that controls the hot water heater main body 1 and includes a timer unit 19 that measures time.

次に、温水暖房運転の停止時の作動について説明する。
図２に示すように、まず、温水暖房運転中に（Ｓ１）、運転スイッチ（図示せず）がＯＦＦ操作されると（Ｓ２）、制御部１８は熱源機２を停止して更に循環ポンプ７の回転数Ｎを所定回転数Ａだけ小さくし（Ｓ３）、タイマー部１９で計時して循環ポンプ７をその回転数で所定時間ｔ動作させる。（Ｓ４） Next, the operation when the hot water heating operation is stopped will be described.
As shown in FIG. 2, first, when the operation switch (not shown) is turned OFF during the hot water heating operation (S1) (S2), the control unit 18 stops the heat source device 2 and further the circulation pump 7. The rotation speed N is reduced by a predetermined rotation speed A (S3), timed by the timer unit 19, and the circulating pump 7 is operated at the rotation speed for a predetermined time t. (S4)

この所定回転数Ａは、循環ポンプ７の回転数Ｎが所定回転数Ａだけ小さくなることにより温水循環路内の圧縮されていた空気は膨張するものの、温水循環路に設けられている圧力安全弁が作動するほど急激に膨張しない回転数で、所定時間ｔ動作させることにより温水循環路内の圧力が安定するものある。
尚、本実施例では温水暖房運転中の循環ポンプ７の回転数Ｎ＝４０００ｒｐｍ、所定回転数Ａ＝５００ｒｐｍ、所定時間ｔ＝１０ｓｅｃとしているものである。 The predetermined rotational speed A is such that the compressed air in the hot water circulation path expands when the rotational speed N of the circulation pump 7 is reduced by the predetermined rotational speed A, but the pressure safety valve provided in the hot water circulation path is The pressure in the hot water circulation path is stabilized by operating for a predetermined time t at a rotational speed that does not expand rapidly as it operates.
In this embodiment, the rotational speed N of the circulation pump 7 during the hot water heating operation is 4000 rpm, the predetermined rotational speed A is 500 rpm, and the predetermined time t is 10 sec.

（Ｓ４）で所定時間ｔ経過したら、次に（Ｓ３）で所定回転数ｎだけ小さくした循環ポンプ７の回転数Ｎと回転停止回転数ｎとを比較し（Ｓ５）、回転停止回転数ｎより循環ポンプ７の回転数Ｎが大きければ（Ｓ３）に戻って循環ポンプ７の回転数Ｎを更に所定回転数Ａだけ小さくし、（Ｓ５）で循環ポンプ７の回転数Ｎが回転停止回転数ｎ以下であれば、循環ポンプ７を停止して（Ｓ６）、温水暖房運転を終了するものである。（Ｓ７）   When the predetermined time t has elapsed in (S4), the rotational speed N of the circulating pump 7 that has been reduced by the predetermined rotational speed n in (S3) is compared with the rotational stop rotational speed n (S5), and from the rotational stop rotational speed n. If the rotation speed N of the circulation pump 7 is large, the process returns to (S3) and the rotation speed N of the circulation pump 7 is further reduced by the predetermined rotation speed A. In (S5), the rotation speed N of the circulation pump 7 is reduced to the rotation stop rotation speed n. If it is below, circulation pump 7 is stopped (S6) and hot water heating operation is ended. (S7)

尚、本実施例では回転停止回転数ｎ＝２０００ｒｐｍとしており、この回転停止回転数ｎは、温水暖房運転中の循環ポンプ７の回転数Ｎが複数回所定回転数Ａずつ回転数を小さくしてその回転数で所定時間動作させたことを複数回繰り返したことで温水循環路内の圧縮されていた空気が徐々に膨張し、その回転数で停止しても温水循環路に設けられている圧力安全弁が作動するほど温水循環路内の圧縮されていた空気が膨張しない回転数である。   In this embodiment, the rotation stop speed n is set to 2000 rpm, and the rotation stop speed n is set such that the rotation speed N of the circulation pump 7 during the hot water heating operation is reduced by a predetermined rotation speed A several times. The pressure that is provided in the hot water circuit even if the compressed air in the hot water circuit is gradually expanded by repeating the operation for a predetermined time at the number of rotations and stops at that speed. The rotation speed is such that the compressed air in the hot water circulation passage does not expand so that the safety valve operates.

以上のように温水暖房運転の停止時に、循環ポンプ７の回転数Ｎを回転停止回転数ｎになるまで所定回転数Ａずつ小さくして、循環ポンプ７の回転数Ｎが回転停止回転数ｎより小さくなったら循環ポンプを停止するので、温水循環路内の圧縮されていた空気が急激に膨張して温水循環路に設けられている圧力安全弁が作動してしまうのを防止できるものである。   As described above, when the hot water heating operation is stopped, the rotation speed N of the circulation pump 7 is decreased by a predetermined rotation speed A until the rotation stop rotation speed n is reached, and the rotation speed N of the circulation pump 7 is smaller than the rotation stop rotation speed n. Since the circulation pump is stopped when it becomes smaller, it is possible to prevent the compressed air in the hot water circulation path from rapidly expanding and the pressure safety valve provided in the hot water circulation path from operating.

尚、本実施例では所定回転数Ａを一定値にしていたがこれに限定されず、１回目の所定回転数Ａを小さくして２回目以降の所定回転数Ａを段々大きくして、一番圧縮されている状態の温水循環路内の空気の膨張を小さくして徐々に膨張の度合いを圧力安全弁が作動しないように大きくしてもよいものである。   In this embodiment, the predetermined rotational speed A is set to a constant value. However, the present invention is not limited to this. The first predetermined rotational speed A is reduced and the second and subsequent rotational speeds A are gradually increased. The expansion of the air in the compressed hot water circulation path may be reduced and the degree of expansion may be gradually increased so that the pressure relief valve does not operate.

それにより温水循環路内の圧縮されていた空気が一番圧縮されている状態で循環ポンプ７の回転数Ｎを小さくすることによる膨張を小さくし、ある程度圧縮されていた空気が膨張したら循環ポンプ７の回転数Ｎを下げる度合いを大きくするので、確実に温水循環路内の圧縮されていた空気が急激に膨張して温水循環路に設けられている圧力安全弁が作動してしまうのを防止しつつ、循環ポンプ７を停止するまでの時間を短くすることができるものである。   Thereby, the expansion by reducing the rotation speed N of the circulation pump 7 in a state where the compressed air in the hot water circulation path is compressed most is reduced, and when the compressed air is expanded to some extent, the circulation pump 7 The degree of lowering the rotational speed N of the hot water circulation passage is increased, so that the compressed air in the hot water circulation passage is surely prevented from suddenly expanding and the pressure safety valve provided in the hot water circulation passage is operated. The time until the circulation pump 7 is stopped can be shortened.

２ 熱源機
３ 熱交換器
７ 循環ポンプ
８ 圧力安全弁
１８ 制御部
１９ タイマー部 2 Heat source machine 3 Heat exchanger 7 Circulation pump 8 Pressure safety valve 18 Control unit 19 Timer unit

Claims (1)

熱源機と、熱交換器と、放熱器と、前記熱交換器と前記放熱器とを接続する温水循環路と、前記温水循環路に設けられた圧力安全弁と、前記温水循環路に設けられた循環ポンプと、前記温水循環路に設けられた密閉式膨張タンクと、タイマー部を有する制御部とを備え、前記熱交換器にて前記熱源機と熱交換して加熱された熱流体を前記循環ポンプにて前記放熱器へ循環させる密閉式の温水暖房装置に於いて、前記制御部は温水暖房運転を停止する時、前記循環ポンプの回転数が予め設定した回転停止回転数より高い時は、前記循環ポンプの回転数を所定回転数小さくしてその状態で所定時間回転させる動作を、前記循環ポンプの回転数が前記回転停止回転数以下になるまで繰り返し、前記所定回転数は、前記循環ポンプの回転数を所定回転数小さくしてその状態で所定時間回転させる動作を繰り返す度に大きく設定され、前記循環ポンプの回転数が前記回転停止回転数以下になった時に前記循環ポンプを停止することを特徴とする温水暖房装置。 A heat source device, a heat exchanger, a radiator, a hot water circuit connecting the heat exchanger and the radiator, a pressure safety valve provided in the hot water circuit, and a hot water circuit a circulation pump, a closed type expansion tank provided in the hot water circulation path, and a control unit having a timer unit, the circulating thermal fluid which is heated by heat exchange the heat source equipment in the heat exchanger the in hot-water heater of closed circulating the radiator at a pump, when the control unit to stop the hot water heating operation, is higher than the rotation stopping rotation number speed preset of the circulation pump, wherein the operation of rotating a predetermined time the rotational speed of the circulating pump in this state by a predetermined number of revolutions smaller, repeated until the rotational speed of the circulating pump falls below the rotation stop rotation speed, the predetermined rotation speed, the circulation pump The number of rotations Small and is largely set each time repeating the operation of rotating in this state a predetermined time, the hot water heating system the rotational speed of the circulating pump is characterized in that stopping the circulation pump when it is below the rotation stop rotation speed .
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