JP2007040204A - Self priming pump and liquid supply and discharge device provided with the same - Google Patents

Self priming pump and liquid supply and discharge device provided with the same Download PDF

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JP2007040204A
JP2007040204A JP2005225921A JP2005225921A JP2007040204A JP 2007040204 A JP2007040204 A JP 2007040204A JP 2005225921 A JP2005225921 A JP 2005225921A JP 2005225921 A JP2005225921 A JP 2005225921A JP 2007040204 A JP2007040204 A JP 2007040204A
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pump
self
liquid
priming pump
priming
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JP4701906B2 (en
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Takafumi Seki
孝文 関
Masahiro Hirata
真宏 平田
Shigeru Yamazaki
茂 山崎
Koichi Morizumi
孝一 森住
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Panasonic Electric Works Co Ltd
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Matsushita Electric Works Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a self priming pump capable of efficiently bleeding air in a short self priming period even if a small-diameter and long pipe is used for a pipe connecting a liquid source and a pump, and a liquid supply and discharge device provided with the same. <P>SOLUTION: In the self priming pump 6 provided with a pump 12 having built-in impeller 1, a motor 13 driving and rotating the impeller 11, a suction passage 14 introducing liquid into the pump 12, and a delivery passage 15 delivering the liquid from the inside of the pump 12, an accelerating part 31 formed in diameter smaller than the diameter of the suction passage 14 to accelerate flow speed is provided in the suction passage 14. The liquid supply and discharge device is constituted by using the self priming pump 6. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は、液体を給排するための自吸式ポンプ及びそれを備えた液体給排装置に関するものである。   The present invention relates to a self-priming pump for supplying and discharging liquid and a liquid supply and discharge device including the same.

従来から水等の液体を給排するためのポンプとして自吸式のポンプが知られている。このポンプは、液体を汲み上げる際に液体源からポンプまでの間の流路中に存在する気泡を吸い出す自吸過程を有するものであり、自吸過程の後に液体の吸送を行うようになっている。   Conventionally, a self-priming pump is known as a pump for supplying and discharging liquid such as water. This pump has a self-priming process of sucking out bubbles present in the flow path from the liquid source to the pump when pumping up the liquid, and the liquid is sucked after the self-priming process. Yes.

特許文献１には自吸式のポンプとして、液体給排用の羽根車を収容する渦室が形成してあるポンプ部と、ポンプ部内に液体を吸入させる吸入路と、ポンプ部から送り出された液体中の気泡を分離させる気液分離室と、気液分離室で気泡を分離させた液体をポンプ部内に戻す送液通路とを有する構造のものが示されている。上記ポンプにあっては、気液分離室内において気泡を吐出口側に押し戻す流れが生じるように形成してあり、これにより送液通路を通ってポンプ部内に戻る空気の量を削減させている。   In Patent Document 1, as a self-priming pump, a pump part in which a vortex chamber for accommodating an impeller for supplying and discharging liquid is formed, a suction passage for sucking liquid into the pump part, and a pump part sent out from the pump part A structure having a gas-liquid separation chamber for separating bubbles in the liquid and a liquid feeding passage for returning the liquid, in which the bubbles are separated in the gas-liquid separation chamber, to the pump unit is shown. In the above-described pump, the air-liquid separation chamber is formed so as to generate a flow that pushes the bubbles back toward the discharge port, thereby reducing the amount of air that returns to the pump section through the liquid feeding passage.

しかし上記のポンプでは、液体源とポンプとを繋ぐ配管として径が小さく且つ配管長の長いものを用いた場合には、管路抵抗が大きいことからポンプ部内に勢い良く液体を吸い込むことが困難である。したがってポンプの吸入路内や配管内に滞留した気泡を液体と共にポンプ部内に一気に吸い込むことが困難であり、必然的に自吸時間が長くなるという問題があった。
特開２００２−１３０１７４号公報 However, in the above pump, when a pipe having a small diameter and a long pipe length is used as a pipe connecting the liquid source and the pump, it is difficult to suck liquid into the pump section vigorously because the pipe resistance is large. is there. Therefore, it is difficult to suck the air bubbles staying in the suction passage or the pipe of the pump into the pump portion together with the liquid, which inevitably increases the self-priming time.
JP 2002-130174 A

本発明は上記問題点に鑑みて発明したものであって、液体源とポンプとを繋ぐ配管として径が小さく且つ配管長の長いものを用いた場合であっても、短い自吸時間で効率良く空気を排出することのできる自吸式ポンプ、及びそれを備えた液体給排装置を提供することを課題とするものである。   The present invention has been invented in view of the above problems, and even when a pipe having a small diameter and a long pipe length is used as a pipe connecting the liquid source and the pump, the self-priming time is efficiently reduced. An object of the present invention is to provide a self-priming pump capable of discharging air and a liquid supply / discharge device including the same.

上記課題を解決するために本発明を、液体を給排する羽根車１１を内蔵するポンプ部１２と、羽根車１１を回転駆動させるモータ部１３と、ポンプ部１２内に液体を導入する吸入路１４と、ポンプ部１２内から液体を吐出する吐出路１５とを具備する自吸式ポンプ６であって、上記吸入路１４中に、流速を増すために吸入路１４の径よりも小径に形成してある増速部３１を有することを特徴としたものとする。   In order to solve the above-described problems, the present invention is based on a pump unit 12 including an impeller 11 that supplies and discharges liquid, a motor unit 13 that rotationally drives the impeller 11, and a suction path that introduces liquid into the pump unit 12. 14 and a discharge passage 15 for discharging liquid from the pump section 12, the self-priming pump 6 is formed in the suction passage 14 with a diameter smaller than the diameter of the suction passage 14 in order to increase the flow velocity. The speed increasing portion 31 is provided.

上記構成の自吸式ポンプ６とすることで、空気の混入した液体が吸入路１４内を通過する際にこれを増速部３１にて増速させ、勢い良くポンプ部１２内に引き込むことができる。したがって、自吸式ポンプ６に繋ぐ配管として径が小さく且つ配管長の長いものを用いた場合であっても、上記配管や吸入路１４内に滞留した空気を短い自吸時間で効率良くポンプ部１２内に吸入し、外部に排出することが可能である。   By using the self-priming pump 6 having the above-described configuration, when the liquid mixed with air passes through the suction passage 14, the speed is increased by the speed increasing portion 31, and the liquid can be drawn into the pump portion 12 vigorously. it can. Therefore, even when a pipe having a small diameter and a long pipe length is used as the pipe connected to the self-priming pump 6, the air remaining in the pipe or the suction path 14 can be efficiently pumped in a short self-priming time. 12 can be inhaled and discharged to the outside.

上記構成の自吸式ポンプ６にあっては、上記増速部３１を、通水孔４１を有して吸入路１４中に配置される仕切板４２を用いて形成してあることも好適である。このようにすることで、吸入路１４を通過する液体と空気とが仕切板４２との衝突により撹拌され、確実に混合されるので、ポンプ部１２内に更に効率的に空気を引き込むことができる。   In the self-priming pump 6 having the above configuration, it is also preferable that the speed increasing portion 31 is formed by using a partition plate 42 having a water passage hole 41 and disposed in the suction passage 14. is there. By doing so, the liquid and air passing through the suction passage 14 are agitated and reliably mixed by collision with the partition plate 42, so that the air can be drawn more efficiently into the pump unit 12. .

更に上記構成の自吸式ポンプ６にあっては、上記増速部３１の最小径部分の断面積を、吸入路１４と配管とを繋ぐ流入口部１８の断面積よりも大きく形成してあることが好適である。このようにすることで、自吸式ポンプ６の吸込流量が低下することが防止される。   Further, in the self-priming pump 6 having the above-described configuration, the cross-sectional area of the minimum diameter portion of the speed increasing portion 31 is formed larger than the cross-sectional area of the inlet portion 18 connecting the suction passage 14 and the pipe. Is preferred. By doing in this way, it is prevented that the suction flow rate of the self-priming pump 6 falls.

また上記課題を解決するために本発明を、上記構成の自吸式ポンプ６を用いた液体給排装置とすることも好ましい。上記構成の液体給排装置とすることで、自吸式ポンプ６に繋ぐ配管として径が小さく且つ配管長の長いものを用いた場合であっても、短い自吸時間で効率良く空気を排出することのでき、使い勝手の良い液体給排装置となる。   In order to solve the above problems, the present invention is preferably a liquid supply / discharge device using the self-priming pump 6 having the above-described configuration. By using the liquid supply / discharge device having the above-described configuration, even when a pipe having a small diameter and a long pipe length is used as a pipe connected to the self-priming pump 6, air is efficiently discharged in a short self-priming time. Therefore, the liquid supply / discharge device is easy to use.

本発明は、液体源とポンプとを繋ぐ配管として径が小さく且つ配管長の長いものを用いた場合であっても、短い自吸時間で効率良く空気を排出することができるという効果を奏する。   The present invention has an effect that air can be efficiently discharged in a short self-priming time even when a pipe having a small diameter and a long pipe length is used as a pipe connecting the liquid source and the pump.

以下、本発明を添付図面に示す実施形態に基いて説明する。図３には、本発明の実施形態における一例の自吸式ポンプ６を用いた液体給排装置を示している。本例の液体給排装置は浴槽２内への注水や浴水循環を行う浴水循環装置１であって、浴槽２の内側面に開口させた流出口３と流入口４とを連通接続させる循環流路５中に設置されるものである。   Hereinafter, the present invention will be described based on embodiments shown in the accompanying drawings. FIG. 3 shows a liquid supply / discharge device using an example self-priming pump 6 according to an embodiment of the present invention. The liquid supply / discharge device of this example is a bath water circulation device 1 that performs water injection and bath water circulation into the bathtub 2, and a circulating flow that connects the outlet 3 and the inlet 4 that are opened on the inner surface of the bathtub 2. It is installed in the road 5.

上記浴水循環装置１は、液体源である浴槽２内の浴水を流出口３から循環流路５内に吸い込んで流入口４から浴槽２内に戻す水圧を与えるために循環流路５中に設置される自吸式ポンプ６と、上記自吸式ポンプ６に接続される湯張り用の導水管７と、循環流路５中の上記自吸式ポンプ６より下流側に設置される加熱部８とで主体を構成している。上記循環流路５は、流出口３と浴水循環装置１の上流端とを連通接続させる循環往路９と、浴水循環装置１の下流端と流入口４とを連通接続させる循環復路１０とを有するものであり、上記循環往路９及び循環復路１０として管径１０ｍｍ、配管長２５ｍ程度の細長い配管を用いている。また上記加熱部８は、ガスや電気又は灯油を用いて浴水を加熱するものである。   The bath water circulator 1 draws the bath water in the bathtub 2 as a liquid source into the circulation channel 5 so as to suck water from the outlet 3 into the circulation channel 5 and return it from the inlet 4 to the bathtub 2. A self-priming pump 6 installed, a hot water conduit 7 connected to the self-priming pump 6, and a heating unit installed downstream of the self-priming pump 6 in the circulation channel 5 8 constitutes the subject. The circulation flow path 5 has a circulation outward path 9 for connecting the outlet 3 and the upstream end of the bath water circulation apparatus 1 in communication and a circulation return path 10 for connecting the downstream end of the bath water circulation apparatus 1 and the inlet 4 in communication. As the circulation outward path 9 and the circulation return path 10, elongated pipes having a pipe diameter of 10 mm and a pipe length of about 25 m are used. Moreover, the said heating part 8 heats bath water using gas, electricity, or kerosene.

図１及び図２には自吸式ポンプ６の内部構造を示している。上記自吸式ポンプ６は、液体である浴水を給排する羽根車１１を内蔵して渦室を形成してあるポンプ部１２と、羽根車１１を回転駆動させるモータ部１３と、循環流路５の上流側の配管と連通接続される流入口部１８を通じてポンプ部１２内に液体を導入する吸入路１４と、ポンプ部１２内から液体を吐出する吐出路１５と、吐出路１５の上流側に形成されるものであって液体中から気泡を分離させる気液分離室１６と、吐出路１５中の下流側に形成されるものであって気液分離室１６を通過した液体をポンプ部１２内に戻す環流口１７と、気液分離室１６の上方にて吐出路１５と循環流路５の下流側の配管とを連通接続させる流出口部１９とで主体を構成している。   1 and 2 show the internal structure of the self-priming pump 6. The self-priming pump 6 includes a pump unit 12 having a built-in impeller 11 that supplies and discharges bath water, which is a liquid, and forms a vortex chamber, a motor unit 13 that rotationally drives the impeller 11, and a circulating flow. A suction path 14 that introduces liquid into the pump section 12 through an inlet section 18 that is connected to a pipe on the upstream side of the path 5, a discharge path 15 that discharges liquid from the pump section 12, and an upstream side of the discharge path 15. A gas-liquid separation chamber 16 that separates bubbles from the liquid, and a pump unit that is formed on the downstream side of the discharge passage 15 and passes through the gas-liquid separation chamber 16. The main part is composed of a circulation port 17 that returns to the inside 12 and an outlet 19 that connects the discharge passage 15 and a pipe downstream of the circulation passage 5 above the gas-liquid separation chamber 16.

自吸式ポンプ６について更に詳述すると、羽根車１１を回転自在に内蔵してあるケーシング２０の開口部分を、パッキン２１を介して補助金具２２で閉塞することでポンプ部１２を形成するとともに、上記ケーシング２０に支持金具２３を介して固定させてあるモータ部１３の出力シャフト２４を該ケーシング２０内に突入させ、メカニカルシール２５を挟み込んだ状態で出力シャフト２４の先端に羽根車１１を連結させている。   The self-priming pump 6 will be described in more detail. The opening portion of the casing 20 in which the impeller 11 is rotatably incorporated is closed with the auxiliary metal fitting 22 via the packing 21 to form the pump portion 12. The output shaft 24 of the motor unit 13 fixed to the casing 20 via the support fitting 23 is inserted into the casing 20, and the impeller 11 is connected to the tip of the output shaft 24 with the mechanical seal 25 sandwiched therebetween. ing.

ケーシング２０には更に、補助金具２２を挟むようにポンプケース２６を固定させている。ポンプケース２６内には仕切り壁２７を一体形成しており、このポンプケース２６の開口部分が補助金具２２で閉塞されることで、上記仕切り壁２７により区画された吸入路１４と吐出路１５とがポンプケース２６内に形成される構造である。補助金具２２には、吸入路１４の下流側に位置することとなる吸入口２８と、吐出路１５の上流側に位置することとなる吐出口２９と、吐出路１５の下流側に位置することとなる環流口１７とを穿設してあり、上記各開口２８，２９，１７を通じてポンプ部１２側と吸入路１４及び吐出路１５側との間で浴水の吸入及び吐出を行うものである。なお流入口部１８及び流出口部１９は、ポンプケース２６の上部にそれぞれ吸入路１４、吐出路１５と連通するように並設している。   Further, a pump case 26 is fixed to the casing 20 so as to sandwich the auxiliary metal fitting 22. A partition wall 27 is integrally formed in the pump case 26, and the opening portion of the pump case 26 is closed by the auxiliary metal fitting 22, so that the suction path 14 and the discharge path 15 partitioned by the partition wall 27 are provided. Is a structure formed in the pump case 26. The auxiliary fitting 22 is located on the downstream side of the suction path 14, the suction port 28 that is located on the downstream side of the suction path 14, the discharge port 29 that is located on the upstream side of the discharge path 15, and the downstream side of the discharge path 15. A recirculation port 17 is formed, and the suction and discharge of the bath water is performed between the pump portion 12 side and the suction passage 14 and the discharge passage 15 side through the openings 28, 29, and 17 described above. . The inlet portion 18 and the outlet portion 19 are arranged in parallel at the upper part of the pump case 26 so as to communicate with the suction passage 14 and the discharge passage 15, respectively.

また、補助金具２２で閉塞されるポンプケース２６内には、仕切り壁２７の内側部分に吸入路１４と共に貯留部３０が形成される。上記貯留部３０は吸入口２８の下方にて吸入路１４と連通するように形成される空所であり、この貯留部３０に導水管７の下流端を連通接続させている。上記導水管７には電磁弁３２（図３参照）を有する配管を連通接続させ、導水管７を通じて貯留部３０内に導水可能としている。   Further, in the pump case 26 closed by the auxiliary metal fitting 22, a storage portion 30 is formed together with the suction path 14 in the inner portion of the partition wall 27. The reservoir 30 is a space formed so as to communicate with the suction path 14 below the suction port 28, and the downstream end of the water conduit 7 is connected to the reservoir 30. A pipe having an electromagnetic valve 32 (see FIG. 3) is connected to the water conduit 7 so that water can be introduced into the reservoir 30 through the water conduit 7.

そして本例の自吸式ポンプ６にあっては、流入口部１８と吸入口２８とを連通させる上記吸入路１４中であって吸入口２８の上流側近傍となる個所に、液体の流速を増すための増速部３１を形成している。上記増速部３１は、吸入路１４を区画する左右両側の仕切り壁２７の一部を厚肉とし、互いに接近する方向に向けて滑らかな突曲面状に盛り上げて形成することで、流線方向に沿って略一定の径で形成される吸入路１４の一部だけを小径に設けた部分である。つまり上記吸入路１４は、流入口部１８から増速部３１に至るまでは略一定径（即ち、略一定の断面積）であるのに対して、増速部３１に至れば下流方向に向けて徐々に小径に（断面積が漸次小さく）なり、最小径部分（最小断面積部分）を過ぎた後は徐々に大径に（断面積が漸次大きく）なるように設けてある。   In the self-priming pump 6 of this example, the liquid flow velocity is set at a location in the vicinity of the upstream side of the suction port 28 in the suction path 14 that connects the inlet 18 and the suction port 28. A speed increasing portion 31 for increasing is formed. The speed increasing portion 31 is formed by thickening a part of the partition walls 27 on both the left and right sides that define the suction passage 14 and bulging it into a smooth projecting curved surface toward each other. This is a portion in which only a part of the suction passage 14 formed with a substantially constant diameter is provided with a small diameter. That is, the suction passage 14 has a substantially constant diameter (that is, a substantially constant cross-sectional area) from the inlet 18 to the speed increasing portion 31, whereas when reaching the speed increasing portion 31, the suction path 14 is directed downstream. The diameter gradually decreases (the cross-sectional area gradually decreases), and after passing through the minimum diameter portion (minimum cross-sectional area portion), the diameter gradually increases (the cross-sectional area gradually increases).

なお、自吸式ポンプ６本来の循環機能性を考慮すれば、上記増速部３１の最小径部分の断面積は、吸入路１４と配管とを繋ぐ流入口部１８の断面積よりも大きく形成してあることが流量を確保するうえで好適である。   In consideration of the inherent circulation functionality of the self-priming pump 6, the cross-sectional area of the minimum diameter portion of the speed increasing portion 31 is formed larger than the cross-sectional area of the inlet portion 18 that connects the suction passage 14 and the pipe. It is preferable to ensure the flow rate.

しかして上記構成の自吸式ポンプ６を備えた浴水循環装置１にあっては、まず湯張り用の配管の電磁弁３２を開くことで導水管７への給水が開始され、貯留部３０を通じて自吸式ポンプ６内に侵入した水が吸入路１４や循環往路９を通って流出口３側から浴槽２内に供給されるとともに、貯留部３０から吸入口２８を通じてポンプ部１２内に流入した水も吐出口２９や循環復路１０を通って流入口４側から浴槽２内に供給される。浴槽２が満水になれば電磁弁３２を閉じて給水を終了する。   Thus, in the bath water circulation apparatus 1 equipped with the self-priming pump 6 having the above-described configuration, first, water supply to the water conduit 7 is started by opening the solenoid valve 32 of the hot water filling pipe, and through the reservoir 30. Water that has entered the self-priming pump 6 is supplied into the bathtub 2 from the outlet 3 side through the suction passage 14 and the circulation outward passage 9, and flows into the pump portion 12 from the storage portion 30 through the suction port 28. Water is also supplied into the bathtub 2 from the inlet 4 side through the discharge port 29 and the circulation return path 10. When the bathtub 2 becomes full of water, the electromagnetic valve 32 is closed and the water supply is terminated.

次いでモータ部１３の出力シャフト２４を回転駆動させると、ポンプ部１２内にて羽根車１１が出力シャフト２４と一体に回転駆動されることで自吸式ポンプ６が駆動される。自吸式ポンプ６が駆動されると浴槽２内の浴水は流出口３を通って循環往路９に流出し、流入口部１８から自吸式ポンプ６内の吸入路１４を通過してポンプ部１２に吸入される。この際に、循環往路９中や吸入路１４に残存する気泡は浴水と混合された状態でポンプ部１２内に吸入され、ポンプ部１２内にて羽根車１１の回転によって分離された後に吐出口２９から吐出路１５内に吐出される。吐出口２９から吐出された気泡の大部分は吐出路１５中の気液分離室１６内にて図中の矢印ａに示すように上方に流れ、吐出口２９の上方に位置する流出口部１９から循環復路１０内に吐出され、浴水に先だって流入口４から浴槽２内に放出される。そして微量に残存する気泡を含む浴水は図中の矢印ｂに示すように吐出路１５を通って環流口１７からポンプ部１２内に還流される。上記動作の繰り返しにより、循環往路９や吸入路１４に残存する空気は浴槽２内の浴水を経て大気中に放出される。   Next, when the output shaft 24 of the motor unit 13 is rotationally driven, the impeller 11 is rotationally driven integrally with the output shaft 24 in the pump unit 12 to drive the self-priming pump 6. When the self-priming pump 6 is driven, the bath water in the bathtub 2 flows out to the circulation forward passage 9 through the outlet 3 and passes through the suction passage 14 in the self-priming pump 6 from the inlet 18. Part 12 is inhaled. At this time, bubbles remaining in the circulation path 9 and the suction path 14 are sucked into the pump unit 12 in a mixed state with bath water, and discharged after being separated by the rotation of the impeller 11 in the pump unit 12. It is discharged from the outlet 29 into the discharge path 15. Most of the bubbles discharged from the discharge port 29 flow upward in the gas-liquid separation chamber 16 in the discharge path 15 as indicated by an arrow a in the figure, and the outlet part 19 located above the discharge port 29. Is discharged into the circulation return path 10 and discharged from the inlet 4 into the bathtub 2 prior to the bath water. Then, the bath water containing a small amount of bubbles is returned to the pump unit 12 from the circulation port 17 through the discharge passage 15 as indicated by an arrow b in the figure. By repeating the above operation, the air remaining in the circulation outward path 9 and the suction path 14 is released into the atmosphere through the bath water in the bathtub 2.

ここで、循環往路９を構成する配管は上記の如く管径が小さく且つ引き回しの長いものであり、管路抵抗が大きいことから空気が混合された浴水をポンプ部１２内に勢いよく引き込むことは通常困難であるが、本例にあっては吸入路１４内にて吸入口２８近傍の増速部３１に至れば吸込み面積が減少して流速が増すため、吸込み力が増強されて浴水と空気とを吸入口２８からポンプ部１２内に一気に引き込むことが可能である。   Here, the pipe constituting the circulation forward path 9 has a small pipe diameter and a long routing as described above, and since the pipe resistance is large, it is not possible to draw the bath water mixed with air into the pump unit 12 vigorously. Although normally difficult, in this example, if the speed increasing part 31 near the suction port 28 is reached in the suction passage 14, the suction area is reduced and the flow velocity is increased. It is possible to draw air into the pump unit 12 from the suction port 28 at once.

上記の自吸運転により残存する空気が全て排出され、配管及び自吸式ポンプ６内が浴水で満たされると、自吸運転状態から定常の給水運転状態になり、流入口部１８から自吸式ポンプ６内に吸入された浴水が連続的に流出口部１９から排出される。流出口部１９から排出された浴水は加熱部８に導入されて所定温度にまで加熱された後、循環復路１０を通じて流入口４から浴槽２内に流入する。このように上記浴水循環装置１を用いて浴槽２内の浴水を循環させるとともに加熱部８にて加熱することで、浴槽２内の浴水を設定温度にまで加熱することができ、且つ上記循環を継続させることで常時設定温度に保持することが可能である。   When all of the remaining air is discharged by the above self-priming operation and the piping and the self-priming pump 6 are filled with bath water, the self-priming operation state is changed to a steady water supply operation state, and the self-priming operation is performed from the inlet 18. Bath water sucked into the pump 6 is continuously discharged from the outlet 19. The bath water discharged from the outlet part 19 is introduced into the heating part 8 and heated to a predetermined temperature, and then flows into the bathtub 2 from the inlet 4 through the circulation return path 10. Thus, the bath water in the bathtub 2 can be heated to the set temperature by circulating the bath water in the bathtub 2 using the bath water circulation device 1 and heating the bath water in the heating section 8. By continuing the circulation, it is possible to always maintain the set temperature.

上述の如く本例の自吸式ポンプ６を備えて成る浴水循環装置１にあっては、吸入路１４中に該吸入路１４より小径であって吸込み面積の小さな増速部３１を設けることで、吸入路１４中の特にポンプ部１２内に通じる吸入口２８近傍での流速を増し、配管や自吸式ポンプ６内に残存する空気を浴水と共にポンプ部１２内に吸入し易くなっている。したがって自吸式ポンプ６に管径が小さく引き回しの長い配管が接続させた場合であっても自吸時間を短くすることができる。   As described above, in the bath water circulation apparatus 1 including the self-priming pump 6 of the present example, the speed increasing portion 31 having a smaller diameter and a smaller suction area than the suction path 14 is provided in the suction path 14. The flow velocity in the suction passage 14, particularly in the vicinity of the suction port 28 leading to the pump portion 12, is increased, and the air remaining in the piping and the self-priming pump 6 is easily sucked into the pump portion 12 together with the bath water. . Accordingly, the self-priming time can be shortened even when the self-priming pump 6 is connected to a pipe having a small pipe diameter and a long route.

次に、本発明の実施形態における他例の自吸式ポンプ６について図４に基づいて説明する。なお本例の自吸式ポンプ６は増速部３１の構成のみが一例と相違するので、一例と同様の構成については同一符号を付して詳しい説明を省略し、増速部３１の構成についてのみ以下に詳述する。   Next, another example of the self-priming pump 6 in the embodiment of the present invention will be described with reference to FIG. In addition, since the self-priming pump 6 of this example is different from the example only in the configuration of the speed increasing portion 31, the same reference numerals are given to the same configuration as the example, and detailed description is omitted, and the configuration of the speed increasing portion 31 is omitted. Only detailed below.

本例にあっては図示の如く、通水孔４１を有する平板状の仕切板４２を吸入路１４中に配置することで増速部３１を形成している。上記仕切板４２はその平板面が吸入路１４の流線方向と直交するように配置されるものであり、吸入路１４の内壁から一体に延設されている。この増速部３１にあっても一例と同様に、吸入路１４より小径であって吸込み面積の小さな通水孔４１を通過する際に流速を増大させ、配管や自吸式ポンプ６内に残存する空気を浴水と共にポンプ部１２内に一気に吸入し易くしている。   In this example, as shown in the figure, the speed increasing portion 31 is formed by arranging a flat partition plate 42 having a water passage hole 41 in the suction passage 14. The partition plate 42 is disposed so that the flat plate surface thereof is orthogonal to the streamline direction of the suction passage 14, and extends integrally from the inner wall of the suction passage 14. Even in the speed increasing portion 31, as in the example, the flow velocity is increased when passing through the water passage hole 41 having a smaller diameter than the suction passage 14 and a small suction area, and remains in the pipe or the self-priming pump 6. This makes it easy to inhale the air to be pumped into the pump unit 12 together with the bath water.

加えて、吸入路１４の流路中であって仕切板４２により遮られる上流側部分（図中Ｐ部）には浴水の通過に伴って乱流が発生し、ここでの乱流渦によって浴水が撹拌されて空気と混ざり合うこととなる。したがって残存する空気を浴水と共に更に高効率でポンプ部１２内に吸入させることが可能である。   In addition, a turbulent flow is generated along the passage of the bath water in the upstream portion (P portion in the figure) that is in the flow path of the suction passage 14 and is blocked by the partition plate 42, and is caused by the turbulent vortex here The bath water is agitated and mixed with air. Therefore, the remaining air can be sucked into the pump unit 12 together with the bath water with higher efficiency.

なお、本例にあっても増速部３１の最小径部分を成す仕切板４２の通水孔４１を、その断面積が流入口部１８の断面積より大きく形成することが流量確保の点で望ましい。図示例では通水孔４１を略半円状としているが、円形状や四角形状、半楕円形状、さらにはスリット形状等の任意の形状を採用可能であり、またパイプを設置しても構わない。   Even in this example, the water passage hole 41 of the partition plate 42 that forms the minimum diameter portion of the speed increasing portion 31 is formed so that its cross-sectional area is larger than the cross-sectional area of the inflow port portion 18 in terms of securing the flow rate. desirable. In the illustrated example, the water passage hole 41 has a substantially semicircular shape, but an arbitrary shape such as a circular shape, a quadrangular shape, a semi-elliptical shape, or a slit shape may be employed, and a pipe may be installed. .

以上、本発明の自吸式ポンプ６を浴水循環装置１に用いた場合について説明してきたが、同様の自吸式ポンプ６を他の液体給排装置に用いることも好適である。他の液体給排装置としては燃料電池装置やヒートポンプ装置等の様々な装置が考えられるが、自吸式ポンプ６を用いて液体を供給、排出、循環等可能な装置であれば適用可能であり、いずれの場合においても、自吸式ポンプ６と液体源とを繋ぐ配管が小径且つ引き回しの長いものであっても短い自吸時間で気泡を効率よく排出することが可能となる。   As described above, the case where the self-priming pump 6 of the present invention is used in the bath water circulation device 1 has been described, but it is also preferable to use the same self-priming pump 6 for other liquid supply / discharge devices. Various devices such as a fuel cell device and a heat pump device are conceivable as other liquid supply / discharge devices, but any device that can supply, discharge, circulate, etc. liquid using the self-priming pump 6 is applicable. In any case, even if the pipe connecting the self-priming pump 6 and the liquid source has a small diameter and a long route, the bubbles can be efficiently discharged in a short self-priming time.

本発明の実施形態における一例の自吸式ポンプの正断面図である。It is a front sectional view of an example self-priming pump in an embodiment of the present invention. 同上の自吸式ポンプの側断面図である。It is a sectional side view of a self-priming pump same as the above. 同上の自吸式ポンプを備える浴槽循環装置の説明図である。It is explanatory drawing of a bathtub circulation device provided with a self-priming pump same as the above. 本発明の実施形態における他例の自吸式ポンプを示しており、（ａ）は正断面図、（ｂ）は（ａ）のＡ−Ａ線断面図である。The self-priming pump of the other example in embodiment of this invention is shown, (a) is a front sectional view, (b) is the sectional view on the AA line of (a).

符号の説明Explanation of symbols

６ 自吸式ポンプ
１１ 羽根車
１２ ポンプ部
１４ 吸入路
１５ 吐出路
１６ 気液分離室
１８ 流入口部
３１ 増速部
４１ 通水孔
４２ 仕切板 6 Self-priming pump 11 Impeller 12 Pump part 14 Suction path 15 Discharge path 16 Gas-liquid separation chamber 18 Inlet part 31 Speed increasing part 41 Water passage hole 42 Partition plate

Claims (4)

液体を給排する羽根車を内蔵するポンプ部と、羽根車を回転駆動させるモータ部と、ポンプ部内に液体を導入する吸入路と、ポンプ部内から液体を吐出する吐出路とを具備する自吸式ポンプであって、上記吸入路中に、流速を増すために吸入路の径よりも小径に形成してある増速部を有することを特徴とする自吸式ポンプ。   Self-priming comprising a pump unit incorporating an impeller for supplying and discharging liquid, a motor unit for rotating the impeller, a suction path for introducing liquid into the pump unit, and a discharge path for discharging liquid from the pump unit A self-priming pump characterized by having a speed increasing portion formed in the suction passage smaller in diameter than the diameter of the suction passage in order to increase the flow velocity. 上記増速部を、通水孔を有して吸入路中に配置される仕切板を用いて形成してあることを特徴とする請求項１に記載の自吸式ポンプ。   The self-priming pump according to claim 1, wherein the speed increasing portion is formed using a partition plate having a water passage hole and disposed in the suction passage. 上記増速部の最小径部分の断面積を、吸入路と配管とを繋ぐ流入口部の断面積よりも大きく形成してあることを特徴とする請求項１又は２に記載の自吸式ポンプ。   3. The self-priming pump according to claim 1, wherein a cross-sectional area of a minimum diameter portion of the speed increasing portion is formed larger than a cross-sectional area of an inflow port connecting the suction passage and the pipe. . 請求項１〜３のいずれか一項に記載の自吸式ポンプを用いた液体給排装置。
A liquid supply / discharge device using the self-priming pump according to claim 1.
JP2005225921A 2005-08-03 2005-08-03 Self-priming pump and liquid supply / discharge device including the same Active JP4701906B2 (en)

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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100765269B1 (en) 2006-10-19 2007-10-09 주식회사 로템 Blower for hydrogen recirculation

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56163794U (en) * 1980-05-09 1981-12-04
JPS61132497U (en) * 1985-02-06 1986-08-19
JPH0317195U (en) * 1989-06-30 1991-02-20
JP2002155880A (en) * 2000-11-20 2002-05-31 Honda Kiko Co Ltd Self-priming pump
JP2003148373A (en) * 2001-11-12 2003-05-21 Ebara Corp Self-priming pump

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS56163794U (en) * 1980-05-09 1981-12-04
JPS61132497U (en) * 1985-02-06 1986-08-19
JPH0317195U (en) * 1989-06-30 1991-02-20
JP2002155880A (en) * 2000-11-20 2002-05-31 Honda Kiko Co Ltd Self-priming pump
JP2003148373A (en) * 2001-11-12 2003-05-21 Ebara Corp Self-priming pump

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR100765269B1 (en) 2006-10-19 2007-10-09 주식회사 로템 Blower for hydrogen recirculation

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