JP4994411B2 - Steam separator for road heating system - Google Patents

Steam separator for road heating system Download PDF

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JP4994411B2
JP4994411B2 JP2009074723A JP2009074723A JP4994411B2 JP 4994411 B2 JP4994411 B2 JP 4994411B2 JP 2009074723 A JP2009074723 A JP 2009074723A JP 2009074723 A JP2009074723 A JP 2009074723A JP 4994411 B2 JP4994411 B2 JP 4994411B2
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明 熊谷
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Rinnai Corp
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Description

本発明は、道路や駐車場等の融雪を行うロードヒーティングシステムの気水分離器に関するものである。   The present invention relates to a steam separator of a road heating system that melts snow on a road or a parking lot.

熱源機とヒートパイプとの間で不凍液を循環させ、道路や駐車場等の融雪を行うロードヒーティングシステムでは、熱源機やヒートパイプ内で発生した気泡が循環ポンプや流量センサ等へ混入すれば、それら各部品の機能を著しく低下させ、ロードヒーティングシステム全体の動作不良を引き起こす恐れがある。そのため、従来の一般的なロードヒーティングシステムでは、熱源機とヒートパイプとを繋ぐ管路に、不凍液から気泡を分離する気水分離器が設けられている（例えば、特許文献１参照）。   In a road heating system that circulates antifreeze liquid between a heat source machine and a heat pipe and melts snow on roads, parking lots, etc., if bubbles generated in the heat source machine or heat pipe enter the circulation pump or flow sensor, etc. , The function of each of these parts may be significantly reduced, causing the overall malfunction of the road heating system. Therefore, in a conventional general load heating system, an air-water separator that separates bubbles from the antifreeze liquid is provided in a pipe line connecting the heat source device and the heat pipe (see, for example, Patent Document 1).

図４は、上記従来のロードヒーティングシステム１Ａの概略構成図であり、不凍液を加熱する熱源機２の熱交換器２２と、道路や駐車場等の地下へ埋設されるヒートパイプ３とが往き配管１１および戻り配管１２を介して接続されている。また、戻り配管１２には、熱交換器２２とヒートパイプ３との間で不凍液を循環させる循環ポンプ４が設けられており、この循環ポンプ４の上流側で且つヒートパイプ３の下流側に気水分離器９が設けられている。 FIG. 4 is a schematic configuration diagram of the conventional road heating system 1A. The heat exchanger 22 of the heat source device 2 that heats the antifreeze liquid and the heat pipe 3 that is buried underground such as on a road or a parking lot are forwarded. The pipe 11 and the return pipe 12 are connected. The return pipe 12 is provided with a circulation pump 4 that circulates the antifreeze liquid between the heat exchanger 22 and the heat pipe 3, and an air is provided upstream of the circulation pump 4 and downstream of the heat pipe 3. A water separator 9 is provided.

上記気水分離器９は、縦長のタンク本体９０の底部に液入口９ａおよび液出口９ｂを設けたものであり、タンク本体９０内の上部には、その内部に集められた空気を器外へ放出するエア抜き弁９２０が設けられている。また、タンク本体９０内には、液入口９ａへ送り込まれた不凍液をタンク本体９０内の上域へ導く導水管９４が設けられている。そして、上記液入口９ａには、ヒートパイプ３の出口側端部３ｂへ繋がる第１の戻り配管１２１が接続され、液出口９ｂには、循環ポンプ４の吸込口４ａへ繋がる第２の戻り配管１２２が接続されている。   The steam / water separator 9 is provided with a liquid inlet 9a and a liquid outlet 9b at the bottom of a vertically long tank body 90, and the air collected in the tank body 90 is disposed outside at the top. An air vent valve 920 for discharging is provided. Further, a water conduit 94 is provided in the tank body 90 to guide the antifreeze liquid sent to the liquid inlet 9 a to the upper area in the tank body 90. A first return pipe 121 connected to the outlet side end 3b of the heat pipe 3 is connected to the liquid inlet 9a, and a second return pipe connected to the suction port 4a of the circulation pump 4 is connected to the liquid outlet 9b. 122 is connected.

従って、ヒートパイプ３の出口側端部３ｂから第１の戻り配管１２１へ送り出された不凍液は、液入口９ａから導水管９４を通ってタンク本体９０内へ送り込まれ、さらに、タンク本体９０の内部空間を下向きに流れて、液出口９ｂから第２の戻り配管１２２へ送り出される。その際、不凍液中の気泡は、不凍液の流れから外れてタンク本体９０内の上部へ集められ、エア抜き弁９２０から器外へ放出される。   Accordingly, the antifreeze liquid sent from the outlet side end 3 b of the heat pipe 3 to the first return pipe 121 is sent from the liquid inlet 9 a through the water conduit 94 into the tank body 90, and further inside the tank body 90. It flows downward through the space and is sent out from the liquid outlet 9b to the second return pipe 122. At that time, the bubbles in the antifreeze liquid are removed from the flow of the antifreeze liquid, collected in the upper part of the tank body 90, and discharged from the air vent valve 920 to the outside.

しかしながら、上記ロードヒーティングシステム１Ａでは、不凍液の漏洩やエア抜き弁９２０の故障等によりタンク本体９０内に空気が溜まり、不凍液の液面が降下した場合には、その溜まった空気が不凍液とともに第２の戻り配管１２２へ引き込まれ、循環ポンプ４や流量センサ７等の各部品の機能を低下させる可能性がある。   However, in the load heating system 1A, when the antifreeze liquid leaks, the air vent valve 920 breaks down, etc., air accumulates in the tank main body 90, and the liquid level of the antifreeze liquid drops, the accumulated air together with the antifreeze liquid 2 is pulled into the return pipe 122, and the functions of the components such as the circulation pump 4 and the flow sensor 7 may be reduced.

そこで、図５に示すように、タンク本体９０に水位センサ９７を設け、この水位センサ９７がタンク本体９０内の不凍液の液面の降下を検知した場合には、循環ポンプ４の動作を強制的に停止して、不凍液の循環を中断させる方法が考えられる。 Therefore, as shown in FIG. 5 , a water level sensor 97 is provided in the tank body 90, and when the water level sensor 97 detects a drop in the level of the antifreeze liquid in the tank body 90, the operation of the circulation pump 4 is forced. It is conceivable to stop and stop the circulation of antifreeze.

具体的には、タンク本体９０の上部には、タンク本体９０内の不凍液の液面位置に応じてオンオフする水位センサ９７が設けられており、この水位センサ９７がオフ状態になれば、ロードヒーティングシステム１に組み込まれた図示しない安全制御プログラムの実行回路によって、循環ポンプ４の動作を強制的に停止させるように構成されている。   Specifically, a water level sensor 97 that is turned on and off according to the position of the antifreeze liquid in the tank main body 90 is provided on the upper portion of the tank main body 90. If the water level sensor 97 is turned off, the load heat sensor 97 is turned off. The operation of the circulation pump 4 is forcibly stopped by an unillustrated safety control program execution circuit incorporated in the operating system 1.

従って、タンク本体９０内の不凍液の液面が降下し、水位センサ９７がオフ状態になれば、不凍液の循環が中断され、タンク本体９０内の空気が不凍液とともに液出口９ｂから第２の戻り配管１２２へ送り出されるのを未然に防止する。   Accordingly, when the level of the antifreeze liquid in the tank main body 90 falls and the water level sensor 97 is turned off, the circulation of the antifreeze liquid is interrupted, and the air in the tank main body 90 together with the antifreeze liquid is discharged from the liquid outlet 9b to the second return pipe. It is prevented from being sent out to 122 in advance.

特開２００６−３４２５７８号公報JP 2006-342578 A

しかしながら、このものでは、導水管９４の開放端からタンク本体９０内へ放出される不凍液の水勢によって水位センサ９７の水位検知部周辺の水流が乱され、不凍液の液面を正確に検知できない可能性がある。   However, in this case, the water flow around the water level detection part of the water level sensor 97 may be disturbed by the water flow of the antifreeze liquid discharged from the open end of the water conduit 94 into the tank body 90, and the liquid level of the antifreeze liquid may not be detected accurately. There is.

本発明は係る点に鑑みてなされたものであり、タンク本体内の不凍液の液面を正確に検知し得るロードヒーティングシステムの気水分離器を提供することを課題とする。   This invention is made | formed in view of the point which concerns, and makes it a subject to provide the steam-water separator of the load heating system which can detect the liquid level of the antifreeze liquid in a tank main body correctly.

本発明に係るロードヒーティングシステムの気水分離器は、
底部に液入口および液出口を有する縦長のタンク本体と、液入口へ送り込まれた不凍液をタンク本体内の上域へ導く導水管と、タンク本体内の不凍液の液面高さを検知する水位センサと、タンク本体内の上部に集められた気泡を器外へ放出可能な弁機構部とを備えたロードヒーティングシステムの気水分離器において、
タンク本体の内部空間の上域を左右に区分けする仕切板をタンク本体の内側上面に垂設し、
導水管の開放端は、仕切板によって区分けされた第１の空間に向かって開放し、第２の空間に前記水位センサの水位検知部を配設し、第２の空間の上部に前記弁機構部を配設し、前記仕切板の上部に気泡の通過可能な連通孔を設けたことを特徴とするものである。 The steam separator of the road heating system according to the present invention,
A vertically long tank body having a liquid inlet and a liquid outlet at the bottom, a water guide pipe that guides the antifreeze liquid sent to the liquid inlet to the upper area in the tank body, and a water level sensor that detects the liquid surface height of the antifreeze liquid in the tank body And a steam-water separator of a load heating system comprising a valve mechanism that can discharge the bubbles collected in the upper part of the tank body to the outside of the vessel,
A partition plate that divides the upper area of the internal space of the tank body into left and right is suspended from the inner upper surface of the tank body,
The open end of the water conduit opens toward the first space divided by the partition plate, the water level detection unit of the water level sensor is disposed in the second space, and the valve mechanism is disposed above the second space. And a communication hole through which bubbles can pass is provided in the upper part of the partition plate .

上記構成によれば、液入口へ送り込まれた不凍液は、導水管の開放端から水位センサの水位検知部の配設されていない第１の空間へ放出され、タンク本体底部の液出口から器外へ放出される。これにより、水位検知部周辺の水流を常に安定した状態で維持できる。   According to the above configuration, the antifreeze liquid fed to the liquid inlet is discharged from the open end of the water conduit into the first space where the water level detection unit of the water level sensor is not disposed, and is discharged from the liquid outlet at the bottom of the tank body. Is released. Thereby, the water flow around a water level detection part can always be maintained in the stable state.

また、不凍液中の気泡は、不凍液が導水管の開放端から第１の空間内へ放出された際に、その不凍液の流れから外れて第１の空間内の上部や、仕切板を越えて第２の空間内の上部へ集められるが、このものでは、第１の空間や第２の空間の上部に集められた気泡は、仕切板上部の連通孔を通ってそれら各空間相互間を往来可能であり、いずれの気泡も弁機構部から器外へ放出されるから、第１の空間や第２の空間の上部に空気溜まりができ難い。従って、タンク本体内に滞留した空気が不凍液とともに液出口へ引き込まれ、循環ポンプや流量センサ等の各部品の機能を低下させるといった問題も生じ難い。特に、弁機構部を、導水管から放出される不凍液の水勢の影響を受け難い第２の空間の上部に配設したことで、第１の空間や第２の空間の上部に集められた気泡が器外へ円滑に放出されるから、タンク本体内に空気溜まりが一層でき難い。従って、上述した各部品の機能を低下させる問題が一層生じ難い。 In addition, when the antifreeze liquid is discharged into the first space from the open end of the water conduit, the bubbles in the antifreeze liquid are removed from the flow of the antifreeze liquid and pass over the upper part of the first space and the partition plate. In this case, air bubbles collected in the upper part of the first space and the second space can come and go between each space through the communication hole in the upper part of the partition plate. Since any bubbles are discharged from the valve mechanism to the outside of the vessel, it is difficult to collect air in the upper part of the first space or the second space. Therefore, the problem is that the air staying in the tank body is drawn into the liquid outlet together with the antifreeze liquid, and the function of each component such as the circulation pump and the flow rate sensor is unlikely to occur. In particular, since the valve mechanism is disposed above the second space that is not easily affected by the water flow of the antifreeze discharged from the water conduit, the bubbles collected in the first space and the second space are collected. Is smoothly discharged to the outside of the vessel, so that it is more difficult to collect air in the tank body. Therefore, the problem of lowering the function of each component described above is less likely to occur.

本発明は、上記構成であるから次の特有の効果を有する。
水位検知部周辺の水流が常に安定した状態で維持できるから、水位センサによる液面検知の正確性が向上する。 Since the present invention has the above configuration, the present invention has the following specific effects.
Since the water flow around the water level detection unit can always be maintained in a stable state, the accuracy of the liquid level detection by the water level sensor is improved.

本発明の実施の形態に係る気水分離器５を備えたロードヒーティングシステム１の概略構成図The schematic block diagram of the road heating system 1 provided with the steam-water separator 5 which concerns on embodiment of this invention 本発明の実施の形態に係る気水分離器５の一部断面斜視図The partial cross-section perspective view of the steam-water separator 5 which concerns on embodiment of this invention 本発明の他の実施形態に係る気水分離器５の説明図Explanatory drawing of the steam-water separator 5 which concerns on other embodiment of this invention. 従来の気水分離器９を備えたロードヒーティングシステム１Ａの概略構成Schematic configuration of a road heating system 1A equipped with a conventional steam separator 9 図Figure 水位センサ９７を設けた従来の気水分離器９の説明図Explanatory drawing of the conventional steam separator 9 provided with the water level sensor 97

次に、上記した本発明を実施するための形態について、添付図面を参照しながら詳述する。
図１に示すロードヒーティングシステム１は、主として、不凍液を加熱する熱源機２と、その加熱された不凍液の熱を放出するヒートパイプ３と、熱源機２とヒートパイプ３との間で不凍液を循環させる循環ポンプ４とで構成されており、本発明の実施の形態に係る気水分離器５は、上記ヒートパイプ３の下流側で且つ循環ポンプ４の上流側の管路に配設されている。 Next, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.
A load heating system 1 shown in FIG. 1 mainly includes a heat source device 2 for heating antifreeze liquid, a heat pipe 3 for releasing heat of the heated antifreeze liquid, and an antifreeze liquid between the heat source apparatus 2 and the heat pipe 3. The steam / water separator 5 according to the embodiment of the present invention is arranged in a pipe line downstream of the heat pipe 3 and upstream of the circulation pump 4. Yes.

熱源機２は、ガス配管２０から送り込まれたガスを燃焼させるバーナ２１と、バーナ２１から放出されたガスの燃焼熱を回収する熱交換器２２とを備えており、この熱交換器２２の出湯口２２ｂに、道路や駐車場等の地下に埋設されたヒートパイプ３の入口側端部３ａが往き配管１１を介して繋がっている。一方、熱交換器２２の入水口２２ａには、ヒートパイプ３の出口側端部３ｂが戻り配管１２を介して繋がっており、循環ポンプ４は、この戻り配管１２に設けられている。   The heat source unit 2 includes a burner 21 that combusts the gas sent from the gas pipe 20 and a heat exchanger 22 that recovers the combustion heat of the gas released from the burner 21. The entrance side end 3a of the heat pipe 3 buried underground such as a road or a parking lot is connected to the gate 22b through the outgoing pipe 11. On the other hand, an outlet side end 3 b of the heat pipe 3 is connected to the water inlet 22 a of the heat exchanger 22 via a return pipe 12, and the circulation pump 4 is provided in the return pipe 12.

従って、循環ポンプ４を作動し且つ熱源機２のバーナ２１を点火すれば、熱交換器２２内で加熱された不凍液がヒートパイプ３へ送り込まれ、このヒートパイプ３から放出される不凍液の熱によって、道路や駐車場等の表面の融雪が行われる。   Therefore, when the circulation pump 4 is operated and the burner 21 of the heat source unit 2 is ignited, the antifreeze liquid heated in the heat exchanger 22 is sent to the heat pipe 3, and the heat of the antifreeze liquid released from the heat pipe 3 is used. Snow melting on the surface of roads, parking lots, etc. is performed.

気水分離器５は、略楕円柱状のタンク本体５０を備えており、このタンク本体５０の底部５０Ｂには、第１の戻り配管（以下、「入水管」という）１２１を介してヒートパイプ３の出口側端部３ｂへ繋がる液入口５ａと、第２の戻り配管（以下、「出水管」という）１２２を介して循環ポンプ４の吸込口４ａへ繋がる液出口５ｂとが形成されている。   The steam / water separator 5 includes a substantially elliptical columnar tank body 50, and a heat pipe 3 is connected to a bottom 50 </ b> B of the tank body 50 via a first return pipe (hereinafter referred to as “water pipe”) 121. A liquid inlet 5a connected to the outlet side end 3b and a liquid outlet 5b connected to the suction port 4a of the circulation pump 4 through a second return pipe (hereinafter referred to as “water discharge pipe”) 122 are formed.

従って、ヒートパイプ３を通過した後の不凍液は、入水管１２１を通ってタンク本体５０内へその底部から送り込まれ、さらに、タンク本体５０の内部空間（後述する脱気室Ｓ１）を下向きに流れて、底部から出水管１２２を通って循環ポンプ４側へ送り出される。その際、不凍液中に含まれる気泡は、不凍液の流れから外れてタンク本体５０内（後述する脱気室Ｓ１）の上部に集められる。   Therefore, the antifreeze liquid after passing through the heat pipe 3 is sent into the tank main body 50 from the bottom through the water inlet pipe 121, and further flows downward in the internal space of the tank main body 50 (a degassing chamber S1 described later). Then, the water is sent out from the bottom through the water discharge pipe 122 to the circulation pump 4 side. At that time, the bubbles contained in the antifreeze liquid are removed from the flow of the antifreeze liquid and collected in the upper portion of the tank body 50 (a deaeration chamber S1 described later).

タンク本体５０の上部５０Ｔには、タンクキャップ５２によって被蓋された不凍液供給口５ｃが形成されており、上記タンクキャップ５２には、不凍液を貯留するリザーブタンク６内と上記不凍液供給口５ｃとを繋ぐ給液配管６１が接続されている。また、タンクキャップ５２内における上記不凍液供給口５ｃと給液配管６１との間には、タンク本体５０およびリザーブタンク６相互間における不凍液の往来を調整する圧力調整弁５３が設けられている。   An antifreeze liquid supply port 5c covered with a tank cap 52 is formed in the upper part 50T of the tank body 50. The tank cap 52 has an inside of the reserve tank 6 for storing the antifreeze liquid and the antifreeze liquid supply port 5c. A liquid supply pipe 61 to be connected is connected. Further, a pressure adjusting valve 53 for adjusting the antifreeze flow between the tank body 50 and the reserve tank 6 is provided between the antifreeze supply port 5 c and the supply pipe 61 in the tank cap 52.

圧力調整弁５３は、不凍液が加熱膨張した際にタンク本体５０内からリザーブタンク６内へ不凍液を送り出す図示しない過圧逃がし弁機構と、不凍液が冷却収縮した際にリザーブタンク６内からタンク本体５０内へ不凍液を引き込む図示しない減圧弁機構とを兼備しており、タンク本体５０内の圧力が所定値以上になれば、そのタンク本体５０内の不凍液が給液配管６１を介してリザーブタンク６内へ送り出され、タンク本体５０内の圧力が所定値以下になれば、リザーブタンク６内の不凍液が給液配管６１を介してタンク本体５０内へ送り込まれる。これにより、タンク本体５０内は、常に液密の状態で且つ一定圧に維持されている。   The pressure regulating valve 53 includes an overpressure relief valve mechanism (not shown) that sends the antifreeze liquid from the tank body 50 to the reserve tank 6 when the antifreeze liquid is heated and expanded, and the tank main body 50 from the reserve tank 6 when the antifreeze liquid cools and contracts. It also has a pressure reducing valve mechanism (not shown) that draws the antifreeze into the tank, and if the pressure in the tank main body 50 reaches a predetermined value or more, the antifreeze in the tank main body 50 passes through the liquid supply pipe 61 in the reserve tank 6. When the pressure in the tank main body 50 becomes a predetermined value or less, the antifreeze liquid in the reserve tank 6 is sent into the tank main body 50 through the liquid supply pipe 61. Thereby, the inside of the tank body 50 is always maintained in a liquid-tight state and at a constant pressure.

タンク本体５０の内側底面５０１には、下端が液入口５ａへ繋がる導水管５４が立設されている。この導水管５４上部の開放端５４０は、タンク本体５０の後述する脱気室Ｓ１に向かって開放しており、その開放端５４０の上部には、不凍液中の不純物を除去するストレーナ５５が装着されている。   On the inner bottom surface 501 of the tank main body 50, a water guide pipe 54 having a lower end connected to the liquid inlet 5a is provided upright. An open end 540 at the upper part of the water conduit 54 is open toward a deaeration chamber S1 (to be described later) of the tank body 50, and a strainer 55 for removing impurities in the antifreeze liquid is attached to the upper end of the open end 540. ing.

ストレーナ５５は、周面全体に複数の小孔を有する円筒状部材であり、入水管１２１から導水管５４へ送り込まれた不凍液は、このストレーナ５５の周面全体の小孔を通る際に整流されて、後述する脱気室Ｓ１内へ放出される。   The strainer 55 is a cylindrical member having a plurality of small holes on the entire peripheral surface, and the antifreeze liquid fed from the water inlet pipe 121 to the water guide pipe 54 is rectified when passing through the small holes on the entire peripheral surface of the strainer 55. Then, it is discharged into a deaeration chamber S1 to be described later.

タンク本体５０の上部５０Ｔには、ストレーナ５５を上記導水管５４の開放端５４０へ装着するためのストレーナ装填口５ｄが形成されている。また、ストレーナ装填口５ｄは、ストレーナキャップ５６によって被蓋されている。   A strainer loading port 5 d for attaching the strainer 55 to the open end 540 of the water conduit 54 is formed in the upper part 50 T of the tank body 50. The strainer loading port 5 d is covered with a strainer cap 56.

さらに、タンク本体５０の上部５０Ｔには、浮き子５７０の位置に応じてオンオフする水位センサ５７が設けられている。この水位センサ５７は、タンク本体５０の内側上面５０２に垂設される軸部５７１に浮き子５７０を上下に遊動可能な状態で取り付けたものであり、浮き子５７０が軸部５７１の下端まで下がった場合に、水位センサ５７に内蔵された図示しないオンオフスイッチがオフになるように構成されている。   Further, a water level sensor 57 that is turned on and off according to the position of the float 570 is provided on the upper portion 50T of the tank body 50. The water level sensor 57 has a float 570 attached to a shaft portion 571 that is suspended from the inner upper surface 502 of the tank body 50 so that the float 570 can move up and down. The float 570 is lowered to the lower end of the shaft portion 571. In this case, an ON / OFF switch (not shown) built in the water level sensor 57 is configured to be turned off.

従って、例えば、ヒートパイプ３や各配管接続部の異常により不凍液が漏洩する不具合を生じ、タンク本体５０内の不凍液の液面が降下した場合には、その液面の降下に追動して浮き子５７０が下がり、図示しないオンオフスイッチがオフになる。尚、上記ロードヒーティングシステム１は、熱源機２による不凍液の加熱動作や循環ポンプ４のオンオフ動作を制御する実行回路を備えており、水位センサ５７がオフ状態になった場合は、この実行回路によって、バーナ２１を強制消火させるとともに循環ポンプ４を強制停止させる安全制御プログラムが実行される。   Therefore, for example, in the case where the antifreeze liquid leaks due to an abnormality in the heat pipe 3 or each pipe connection portion and the liquid level of the antifreeze liquid in the tank body 50 drops, the liquid floats following the liquid level drop. The child 570 is lowered, and an on / off switch (not shown) is turned off. The load heating system 1 includes an execution circuit that controls the heating operation of the antifreeze liquid by the heat source device 2 and the on / off operation of the circulation pump 4. When the water level sensor 57 is turned off, the execution circuit Thus, the safety control program for forcibly extinguishing the burner 21 and forcibly stopping the circulation pump 4 is executed.

タンク本体５０の内側上面５０２には、タンク本体５０の内部空間の上域を左右二つに区分けする仕切板５８が垂設されている。この仕切板５８は、タンク本体５０の内側上面５０２と内側底面５０１との間の略中央位置まで延びており、その左右二つに区分けされた第１の空間（以下、「脱気室」という）Ｓ１および第２の空間（以下、「水位検知室」という）Ｓ２相互は、仕切板５８の下端側の空間で繋がっている。   On the inner upper surface 502 of the tank body 50, a partition plate 58 is provided so as to divide the upper region of the internal space of the tank body 50 into two on the left and right. The partition plate 58 extends to a substantially central position between the inner upper surface 502 and the inner bottom surface 501 of the tank body 50, and is divided into a first space (hereinafter referred to as “a deaeration chamber”) divided into two on the left and right sides. ) S1 and the second space (hereinafter referred to as “water level detection chamber”) S2 are connected to each other by a space on the lower end side of the partition plate 58.

液入口５ａは、上記脱気室Ｓ１の下方に開設されており、ストレーナ装填口５ｄは、この脱気室Ｓ１の上部に開設されている。また、導水管５４は、脱気室Ｓ１内まで延びている。一方、液出口５ｂは、上記水位検知室Ｓ２の下方に開設されており、不凍液供給口５ｃは、この水位検知室Ｓ２の上部に開設されている。また、水位センサ５７の浮き子５７０は、水位検知室Ｓ２内に配設されている。   The liquid inlet 5a is opened below the deaeration chamber S1, and the strainer loading port 5d is opened above the deaeration chamber S1. Further, the water conduit 54 extends into the deaeration chamber S1. On the other hand, the liquid outlet 5b is opened below the water level detection chamber S2, and the antifreeze liquid supply port 5c is opened above the water level detection chamber S2. Further, the float 570 of the water level sensor 57 is disposed in the water level detection chamber S2.

従って、入水管１２１から導水管５４の開放端５４０へ送り込まれた不凍液は、ストレーナ５５を介して脱気室Ｓ１内へ放出された後、脱気室Ｓ１の下域へ導かれる。そしてさらに、仕切板５８の下端側の空間を通って水位検知室Ｓ２の下域へ導かれ、液出口５ｂから出水管１２２へ送り出される。   Accordingly, the antifreeze liquid fed from the water inlet pipe 121 to the open end 540 of the water guide pipe 54 is discharged into the deaeration chamber S1 through the strainer 55 and then guided to the lower region of the deaeration chamber S1. Further, it is guided to the lower area of the water level detection chamber S2 through the space on the lower end side of the partition plate 58, and sent out from the liquid outlet 5b to the water discharge pipe 122.

また、図２（ａ）および（ｂ）に示すように、仕切板５８の上端で且つ不凍液供給口５ｃに対向する位置には、脱気室Ｓ１および水位検知室Ｓ２相互を繋ぐ連通孔５８０が開設されている。従って、導水管５４の開放端５４０から脱気室Ｓ１へ不凍液が送り込まれた際、その不凍液の流れから外れて脱気室Ｓ１の上部に集まった気泡は、上記連通孔５８０からタンク本体５０の内側上面５０２に沿って水位検知室Ｓ２の上部へ移動する。そして、タンク本体５０内の不凍液が加熱膨張して圧力調整弁５３の過圧逃がし弁機構が開放した際に、不凍液とともに給液配管６１を通ってリザーブタンク６内へ送り出される。これにより、循環ポンプ４や不凍液の循環経路に配設された他の部品（例えば、熱交換器２２への不凍液の流量を計測する流量センサ７）への空気の混入が防止される。   Further, as shown in FIGS. 2A and 2B, a communication hole 580 that connects the deaeration chamber S1 and the water level detection chamber S2 to each other is located at the upper end of the partition plate 58 and opposed to the antifreeze liquid supply port 5c. It has been established. Therefore, when the antifreeze liquid is sent from the open end 540 of the water conduit 54 to the deaeration chamber S1, the bubbles gathered in the upper part of the deaeration chamber S1 out of the flow of the antifreeze liquid are transferred from the communication hole 580 to the tank body 50. It moves along the inner upper surface 502 to the upper part of the water level detection chamber S2. Then, when the antifreeze liquid in the tank body 50 is heated and expanded and the overpressure relief valve mechanism of the pressure regulating valve 53 is opened, the antifreeze liquid is sent into the reserve tank 6 through the liquid supply pipe 61 together with the antifreeze liquid. This prevents air from entering the circulation pump 4 and other components (for example, the flow sensor 7 that measures the flow rate of the antifreeze liquid to the heat exchanger 22) disposed in the circulation path of the antifreeze liquid.

このものでは、導水管５４の開放端５４０と水位検知部である浮き子５７０との間に仕切板５８を設けたことによって、導水管５４の開放端５４０から放出された不凍液が浮き子５７０側へ直接的に流れ込まないから、その不凍液の水勢によって浮き子５７０周辺の水流が乱され難く、常に安定した状態で維持できる。従って、水位検知室Ｓ２の不凍液の液面高さが安定するし、上記水勢によって浮き子５７０が強制的に押し下げられるのも防止できる。これにより、水位センサ５７による液面検知の正確性が向上する。   In this configuration, the partition plate 58 is provided between the open end 540 of the water conduit 54 and the float 570 that is a water level detection unit, so that the antifreeze discharged from the open end 540 of the water conduit 54 is on the float 570 side. Therefore, the water flow around the float 570 is hardly disturbed by the water flow of the antifreeze, and can always be maintained in a stable state. Therefore, the level of the antifreeze liquid in the water level detection chamber S2 is stabilized, and it is possible to prevent the float 570 from being forced down by the water force. Thereby, the accuracy of the liquid level detection by the water level sensor 57 is improved.

その結果、タンク本体５０内に規定量の不凍液があるにもかかわらず上述の安全制御プログラムが実行されてしまう誤動作を生じ難く、ロードヒーティングシステム１に組み込まれた安全機能の動作精度が向上する。   As a result, it is difficult to cause a malfunction in which the above-described safety control program is executed despite the presence of the prescribed amount of antifreeze in the tank main body 50, and the operation accuracy of the safety function incorporated in the road heating system 1 is improved. .

また、仕切板５８の上端に連通孔５８０を設けたことによって、脱気室Ｓ１の上部に集められた気泡は、その連通孔５８０を通って水位検知室Ｓ２の上部へ導かれ、圧力調整弁５３から給液配管６１を介して器外（リザーブタンク６内）へ放出されるから、タンク本体５０内の上部に空気溜まりができ難い。従って、タンク本体５０内に滞留した空気が不凍液とともに液出口５ｂへ引き込まれ、循環ポンプ４や上記流量センサ７等の各部品の機能を低下させるといった問題も生じ難い。   Further, by providing the communication hole 580 at the upper end of the partition plate 58, the air bubbles collected in the upper part of the deaeration chamber S1 are guided to the upper part of the water level detection chamber S2 through the communication hole 580, and the pressure regulating valve. 53 is discharged to the outside of the vessel (inside the reserve tank 6) via the liquid supply pipe 61, it is difficult to collect air in the upper part of the tank body 50. Therefore, the problem is that the air staying in the tank main body 50 is drawn into the liquid outlet 5b together with the antifreeze and the functions of the components such as the circulation pump 4 and the flow rate sensor 7 are reduced.

さらに、連通孔５８０を不凍液供給口５ｃに対向する位置に設けたことによって、不凍液が連通孔５８０から浮き子５７０の上部へ直接的に流れ込み、その浮き子５７０を強制的に押し下げるのを防止できるから、上述の誤動作が生じ難い。これにより、上記安全機能の動作精度が一層向上する。   Further, by providing the communication hole 580 at a position facing the antifreeze liquid supply port 5c, it is possible to prevent the antifreeze liquid from flowing directly from the communication hole 580 to the upper portion of the float 570 and forcibly pushing down the float 570. Therefore, the malfunction described above is unlikely to occur. Thereby, the operation accuracy of the safety function is further improved.

また、タンク本体５０内の上部に集められた気泡を器外へ放出可能な過圧逃がし弁機構を有する圧力調整弁５３を、導水管５４の開放端５４０から放出された不凍液の水勢の影響を受け難い水位検知室Ｓ２の上部に配設したことによって、水位検知室Ｓ２に集められた気泡を円滑に器外へ放出させることが可能であるから、タンク本体５０内に空気溜まりが一層でき難く、上述の各部品の機能を低下させる問題も一層生じ難い。   Further, the pressure regulating valve 53 having an overpressure relief valve mechanism capable of releasing the bubbles collected in the upper part of the tank body 50 to the outside of the tank body 50 is affected by the influence of the water flow of the antifreeze liquid discharged from the open end 540 of the water conduit 54. Since the air bubbles collected in the water level detection chamber S2 can be smoothly discharged to the outside by being disposed at the upper part of the water level detection chamber S2, which is difficult to receive, it is more difficult to collect air in the tank body 50. The problem of lowering the function of each of the above-mentioned components is less likely to occur.

また、ストレーナ装填口５ｄを脱気室Ｓ１側に設けたことによって、ストレーナ５５を取り外す際に、そのストレーナ５５の内面から漏出した不純物が浮き子５７０や軸部５７１へ直接的に付着する恐れもないから、水位センサ５７の液面検知機能を長期的に維持できる。   Further, by providing the strainer loading port 5d on the deaeration chamber S1 side, when the strainer 55 is removed, impurities leaked from the inner surface of the strainer 55 may directly adhere to the float 570 or the shaft portion 571. Therefore, the liquid level detection function of the water level sensor 57 can be maintained for a long time.

尚、上記実施の形態では、仕切板５８によってタンク本体５０の内部空間の上域を左右略半分に分割することで、導水管５４を配設する脱気室Ｓ１と、不凍液供給口５ｃおよび浮き子５７０を配設する水位検知室Ｓ２とに区分けしている。 In the above embodiment, the upper region of the internal space of the tank main body 50 is divided into substantially right and left halves by the partition plate 58, so that the deaeration chamber S1 in which the water guide pipe 54 is disposed, the antifreeze liquid supply port 5c, and the float. It is divided into a water level detection chamber S2 in which a child 570 is disposed.

尚、上記実施の形態では、浮き子５７０の位置によってタンク本体５０内の不凍液の液面高さを検知する形式の水位センサ５７を採用したが、図３に示すように、タンク本体５０の内側上面５０２に垂設した電極によって水位を検知する形式の水位センサ５９を採用しても良い。この場合、水位センサ５９の水位検知部である電極端部５９０を水位検知室Ｓ２内に配設し、タンク本体５０内の不凍液の液面がこの電極端部５９０より下方まで降下した際に、上述の安全制御プログラムが実行されるように構成されている。 In the above embodiment, is adopted the water level sensor 57 of the type which detects the liquid level of the antifreeze in the tank body 50 by the position of the floating member 570, as shown in FIG. 3, the inside of the tank body 50 You may employ | adopt the water level sensor 59 of the type which detects a water level with the electrode suspended from the upper surface 502. FIG. In this case, when the electrode end portion 590 which is the water level detection portion of the water level sensor 59 is disposed in the water level detection chamber S2, the level of the antifreeze liquid in the tank body 50 falls below the electrode end portion 590. The above-described safety control program is configured to be executed.

このものでは、導水管５４の開放端５４０と水位検知部である電極端部５９０との間に仕切板５８を設けたことによって、導水管５４の開放端５４０から放出された不凍液が電極端部５９０側へ直接的に流れ込まないから、その不凍液の水勢によって電極端部５９０周辺の水流が乱され難く、常に安定した状態で維持できる。その結果、上記実施の形態と同様、水位センサ５９による液面検知の正確性が向上する。   In this case, the partition plate 58 is provided between the open end 540 of the water conduit 54 and the electrode end 590 which is a water level detection unit, so that the antifreeze liquid discharged from the open end 540 of the water conduit 54 is the electrode end. Since it does not flow directly into the 590 side, the water flow around the electrode end portion 590 is hardly disturbed by the water flow of the antifreeze, and can always be maintained in a stable state. As a result, as in the above embodiment, the accuracy of the liquid level detection by the water level sensor 59 is improved.

１・・・ロードヒーティングシステム
２・・・熱源機
３・・・ヒートパイプ
４・・・循環ポンプ
５・・・気水分離器
５ａ・・・液入口
５ｂ・・・液出口
５０・・・タンク本体
５３・・・圧力調整弁（弁機構部）
５４・・・導水管
５４０・・・開放端
５７・・・水位センサ
５７０・・・浮き子（水位検知部）
５８・・・仕切板
５８０・・・連通孔 DESCRIPTION OF SYMBOLS 1 ... Road heating system 2 ... Heat source machine 3 ... Heat pipe 4 ... Circulation pump 5 ... Steam-water separator 5a ... Liquid inlet 5b ... Liquid outlet 50 ... Tank body 53 ... Pressure adjusting valve (valve mechanism)
54 ... Water guide pipe 540 ... Open end 57 ... Water level sensor 570 ... Float (water level detector)
58 ... Partition plate 580 ... Communication hole

Claims (1)

底部に液入口および液出口を有する縦長のタンク本体と、液入口へ送り込まれた不凍液をタンク本体内の上域へ導く導水管と、タンク本体内の不凍液の液面高さを検知する水位センサと、タンク本体内の上部に集められた気泡を器外へ放出可能な弁機構部とを備えた気水分離器において、
タンク本体の内部空間の上域を左右に区分けする仕切板をタンク本体の内側上面に垂設し、
導水管の開放端は、仕切板によって区分けされた第１の空間に向かって開放し、第２の空間に前記水位センサの水位検知部を配設し、第２の空間の上部に前記弁機構部を配設し、前記仕切板の上部に気泡の通過可能な連通孔を設けたことを特徴とする、ロードヒーティングシステムの気水分離器。 A vertically long tank body having a liquid inlet and a liquid outlet at the bottom, a water guide pipe that guides the antifreeze liquid sent to the liquid inlet to the upper area in the tank body, and a water level sensor that detects the liquid surface height of the antifreeze liquid in the tank body And a steam / water separator comprising a valve mechanism that can discharge bubbles collected in the upper part of the tank body to the outside,
A partition plate that divides the upper area of the internal space of the tank body into left and right is suspended from the inner upper surface of the tank body,
The open end of the water conduit opens toward the first space divided by the partition plate, the water level detection unit of the water level sensor is disposed in the second space, and the valve mechanism is disposed above the second space. An air / water separator for a road heating system, characterized in that a communication hole is provided in the upper part of the partition plate and through which bubbles can pass .
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