JPS60125794A - Voltage responsive type circuit automatic switching system motor pump - Google Patents

Abstract

PURPOSE:To permit to cope with the fluctuation of a voltage by a method wherein the coil circuit of a motor is switched automatically to a high voltage or a low voltage in accordance with an electric source voltage and, further, the coil circuit is switched to a low voltage in case the voltage is decreased gradually from a high voltage condition. CONSTITUTION:The pumping characteristic of a pump is decreased gradually when the electric source voltage is reduced from a rated voltage (220V), however, a relay 30 switches the connection of the coil of the motor from 220V specification into 110V specification when the voltage is the one before the pumping capacity becomes zero (120V). According to this switching, it is shifted to the rated operation at the 110V side of the motor pump and the pumping capacity is recovered to the same value in the cutoff total lift and the water lifting amount thereof as the case of the rated operation in 220V. When the electric source voltage is decreased further, the water lifting performance is decreased gradually, however, the pumping effect may be continued within a wide range until the rated voltage (110V) of the low voltage side is reduced to the 50% of the same (55V).

Description

【発明の詳細な説明】 〔発明の利用分野〕 この発明はポンプ装置の改良に係υ、特に電圧低下時に
も揚水可能な電圧応動形回路自動切替式電動ポンプを提
供するものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention relates to the improvement of pump devices, and particularly provides a voltage-responsive circuit automatic switching electric pump that can pump water even when the voltage drops.

〔発明の背景〕[Background of the invention]

国内の家庭用あるいは工業用電源の一部では２００Ｖ、
また、東南アジア諸国でも２２０■電源が用いられてい
る。特に東南アジアでは電圧が大幅に低下する事が日常
茶飯事である地域も少なくはないのが現状である。Some domestic domestic or industrial power supplies are 200V,
220■ power sources are also used in Southeast Asian countries. Particularly in Southeast Asia, the current situation is that there are many regions where significant drops in voltage are commonplace.

従来の電動ポンプでは、電源電圧の低下に応じて揚水性
能も低下し、定格電圧の５０チ以下に箪７源電圧が低下
すると、殆んど揚水しなくなるのが一般的である。しか
し、特に生活用水を供給するポンプが、電源電圧の低下
により使用不可能となると、日常生活に直接影響を及ぼ
すため、電源電工／ｙ−１−＋−一も！Φ玉簡１／ｒえ
堪士で炙入雷舗ゼンプの閂発が望１れている。In conventional electric pumps, the water pumping performance decreases as the power supply voltage decreases, and when the power source voltage drops below the rated voltage of 50 cm, it is common for pumps to hardly pump water. However, if the pump that supplies water for domestic use becomes unusable due to a drop in power supply voltage, it will have a direct impact on daily life. It is hoped that the Φyokukan 1/r ekanshi will be able to release the flame-warrior zemp.

〔発明の目的〕[Purpose of the invention]

この発明の目的は、上記した従来技術の欠点を除去し、
電圧変動にも対応できる電動ポンプを提供することにあ
る。The purpose of this invention is to eliminate the above-mentioned drawbacks of the prior art,
The purpose of the present invention is to provide an electric pump that can respond to voltage fluctuations.

〔発明の概要〕[Summary of the invention]

本発明は、電動機の巻線回路を、電源電圧に応じて高電
圧用あるいは低電圧用に自動的に切替え、しかも高電圧
状態から徐々に電圧が低下させた場合、揚水量カニ零に
なる前に電動機の巻線回路が低電圧用に切替わり、揚水
作用がとぎれることなく円び定常運転に移れるようにし
たものである。The present invention automatically switches the winding circuit of the motor to high voltage or low voltage depending on the power supply voltage, and furthermore, when the voltage is gradually lowered from a high voltage state, the water pumping amount can be reduced to zero before the amount of water pumped reaches zero. The motor's winding circuit was then switched to a low-voltage one, making it possible to shift to steady-state operation without interrupting the water pumping action.

つ甘り、進相用のコンデンサと補助巻線とを直列接続し
た補助回路と、２糾の主巻線とを有する’ｊｌｉ；動ポ
ンプの電動機回路における、前記補助回路と前記２組の
主巻線の一方の主巻線とを並列接続して並列回路を構成
し、該並列回路と当該２組の主巻線の他方の主巻線との
接続を、並列または直列に切替えるリレーを備え、該リ
レーの励磁回路に加わる電圧が所定値よりも高い場合に
は前記並列回路と前記他方の主巻線とが直列に接続され
、上記励磁回路に加わる電圧が所定値よりも低い場合に
は上記並列回路と上記他方の主巻線とが並列に接続切替
えされるように構成し、電源電圧を前記リレーの切替動
作電圧よシも高い電圧から徐々に下げた場合に、ポンプ
の揚水量がＯになる前に前記リレーが切替動作して、前
記並列回路と前記他方の主巻線とを並列に接続するよう
に前記リレーの切替動作電圧を設定した事を特徴とする
電圧応動形回路自動切替式電動ポンプに関するものであ
る。In a motor circuit for a dynamic pump, the auxiliary circuit has an auxiliary circuit in which a phase advance capacitor and an auxiliary winding are connected in series, and two main windings. A parallel circuit is formed by connecting one of the main windings of the windings in parallel, and a relay is provided that switches the connection between the parallel circuit and the other main winding of the two sets of main windings to parallel or series. , when the voltage applied to the excitation circuit of the relay is higher than a predetermined value, the parallel circuit and the other main winding are connected in series, and when the voltage applied to the excitation circuit is lower than the predetermined value, The above-mentioned parallel circuit and the above-mentioned other main winding are configured to be connected and switched in parallel, and when the power supply voltage is gradually lowered from a voltage higher than the switching operation voltage of the relay, the water pumping amount of the pump increases. The switching operation voltage of the relay is set so that the relay switches and connects the parallel circuit and the other main winding in parallel before the voltage becomes O. This invention relates to a switching electric pump.

〔発明の実施例〕[Embodiments of the invention]

以下、本発明の一実施例を図面を用いて説明する。なお
、各図中、同一または同等の部位には同一の符号を付け
る。An embodiment of the present invention will be described below with reference to the drawings. In addition, in each figure, the same reference numerals are given to the same or equivalent parts.

第１図は、本発明の一実施例を示す自動式電動ポンプで
ある。鋼板製円筒形圧力タンク１の上には、電動機２で
駆動されるポンプ部３が載置されておシ、周囲を覆う保
護カバー４で保護されている。前記圧力り／り１には、
該圧タンク１内部の圧力変化に応じてポンプ部３の自動
運転制御を行なう圧力スイッチ５が取付けられている。FIG. 1 shows an automatic electric pump showing one embodiment of the present invention. A pump section 3 driven by an electric motor 2 is mounted on a cylindrical pressure tank 1 made of a steel plate, and is protected by a protective cover 4 surrounding the tank. The pressure 1/1 includes:
A pressure switch 5 is installed to automatically control the operation of the pump section 3 in response to changes in the pressure inside the pressure tank 1.

電動機２の駆動によりポンプ部３が揚水運転を開始する
と、水源から吸込管７を通って水が吸込１れ、ポンプ部
３で昇圧されて圧力タンク１内に流入し、吐出管８を通
って水栓９に供給される。水栓９の開閉により、圧力タ
ンク１内で圧縮されている空気１０の圧力が変動し、該
圧力の変化に応動して前記圧力スイッチ５が前記電動機
２の電気回路を開閉して、ポンプ部３の揚水運転の自動
制御を行なう。When the pump section 3 starts pumping operation by driving the electric motor 2, water is sucked in from the water source through the suction pipe 7, is pressurized by the pump section 3, flows into the pressure tank 1, and then passes through the discharge pipe 8. The water is supplied to the faucet 9. By opening and closing the faucet 9, the pressure of the air 10 compressed in the pressure tank 1 fluctuates, and in response to the change in pressure, the pressure switch 5 opens and closes the electrical circuit of the electric motor 2, and the pump section Perform automatic control of pumping operation in step 3.

次に第２図は、上記実施例に係るものを説明するだめの
、電動機２の駆動回路の原理図である。Next, FIG. 2 is a diagram showing the principle of the drive circuit for the electric motor 2, but only for explaining the above embodiment.

該図で、５は既述の圧力スイッチ、１５は補助巻線（Ａ
）、１６は進相用のコンデンサ（Ｃ）、１７は補助回路
を示し、１８は電動機２の２組の主巻線のうちの一方の
主巻線（Ｍ）、１９は同様の他方の主巻線（Ｎ）、２０
ないし２２は回路、２３は感温リレー、２４ないし２６
は回路、２７は電源でおる。また、２Ｂは前記の回路２
１゜２４．２６を各々電気的に絶縁するとともに保持す
る合成樹脂製のプラグ、２９Ａは低電圧（例えば１１０
Ｖ）結線用のキャップ、２９Ｂは高電圧（例えば２２０
Ｖ）結線用のキャップである。In the figure, 5 is the pressure switch mentioned above, 15 is the auxiliary winding (A
), 16 is a phase advancing capacitor (C), 17 is an auxiliary circuit, 18 is one main winding (M) of the two sets of main windings of the motor 2, and 19 is the other main winding of the same type. Winding wire (N), 20
22 to 22 are circuits, 23 are temperature sensitive relays, 24 to 26
is the circuit, and 27 is the power supply. In addition, 2B is the circuit 2 described above.
A synthetic resin plug that electrically insulates and holds 1°24.26, 29A is a low voltage (for example, 110
V) Connection cap, 29B is for high voltage (e.g. 220
V) It is a cap for wiring.

しかして、電源電圧が低い場合（例えば１１０Ｖ）には
前記プラグ２８をキャップ２９Ａに装着し、電源電圧が
高い場合（例えば２２０Ｖ）には上記プラグ２８を他方
のキャップ２９Ｂに装着する。この場合には手動切替に
よるものを示している。Thus, when the power supply voltage is low (for example, 110V), the plug 28 is attached to the cap 29A, and when the power supply voltage is high (for example, 220V), the plug 28 is attached to the other cap 29B. In this case, manual switching is shown.

すなわち、補助巻線１５と進相用のコンデンサ１６を直
列接続した補助回路１７と、主巻ｉ　（Ｍ）１８とが並
列接続され、一端に回路２４、他端に回路２５が接続さ
れている。また、他方の主巻線（Ｎ）１９の一方の回路
２０は、回路２１と、巻線焼損防止用の感温リレー２３
を有する回路２２とに分岐するとともに、他端には回路
２６が接続される。That is, an auxiliary circuit 17 in which an auxiliary winding 15 and a phase advance capacitor 16 are connected in series, and a main winding i (M) 18 are connected in parallel, with a circuit 24 connected to one end and a circuit 25 connected to the other end. . Further, one circuit 20 of the other main winding (N) 19 includes a circuit 21 and a temperature-sensitive relay 23 for preventing winding burnout.
A circuit 22 is connected to the other end, and a circuit 26 is connected to the other end.

しかして、電源２７の電圧が低い（例えば１１０Ｖ）の
場合には、プラグ２８をキャップ２９Ａに装着すれは、
前記回路２１と回路２４が接続され、回路２２を電源２
７の一端に、また、回路２５と回路２６とが接続される
とともに、圧力スイッチ５を介して電源２７の他端に接
続される。However, when the voltage of the power supply 27 is low (for example, 110V), when the plug 28 is attached to the cap 29A,
The circuit 21 and the circuit 24 are connected, and the circuit 22 is connected to the power supply 2.
Further, a circuit 25 and a circuit 26 are connected to one end of the pressure switch 7, and the other end of a power source 27 is connected via the pressure switch 5.

この場合の等何回路は、第３図の如く、前記補助回路１
７と主巻線（Ｍ）と主巻線（Ｎ）が、それぞれ並列接続
される。In this case, the equal circuit is the auxiliary circuit 1, as shown in FIG.
7, the main winding (M), and the main winding (N) are each connected in parallel.

甘だ、電源電圧が高い場合（例えば２２０Ｖ）には、上
記プラグ２８を前記他方のプラグ２９Ｂに装着すれは、
回路２４と回路２６とが接続され、回路２１は絶縁状態
になり、回路２２は電源２７の一端に接続され、回路２
５は圧力スイッチ５を介して電源２７の他端に接続され
た状態になる。Naive, if the power supply voltage is high (for example 220V), attaching the plug 28 to the other plug 29B,
The circuit 24 and the circuit 26 are connected, the circuit 21 is in an insulated state, the circuit 22 is connected to one end of the power supply 27, and the circuit 2
5 is connected to the other end of the power source 27 via the pressure switch 5.

この場合の等何回路は第４図の如くになり、補助回路１
７と主巻線（Ｍ）１８との並列接続回路と、主巻線（Ｎ
）１９とは直列接続され、電源電圧２２０■は各々半分
（ＩＩＯＶ）ずつ分担印加される。The equivalent circuit in this case is as shown in Figure 4, and the auxiliary circuit 1
7 and the main winding (M) 18, and the main winding (N
) 19 are connected in series, and a half (IIOV) of the power supply voltage 220 is applied to each of them.

したがって、補助回路１７、主巻線（’Ｍ）１８、主巻
線（Ｎ）１９を１１０Ｖ用に設計しておき、電源電圧に
応じて、前述の如くに回路接続切替を行なえば、１１０
■と２２０■の両方の電源に使用可能な電動ポンプが得
られることになる。Therefore, if the auxiliary circuit 17, main winding ('M) 18, and main winding (N) 19 are designed for 110V, and the circuit connections are switched as described above according to the power supply voltage,
An electric pump that can be used as a power source for both 1 and 220 is obtained.

次に、第５図、第６図に示す回路は、本発明の一実施例
に係るものである。Next, the circuits shown in FIGS. 5 and 6 are according to an embodiment of the present invention.

すなわち、前述の電動機２の回路と電源２７との間にリ
レー３０を設置し、このリレー３０によシ、電源電圧に
応じて電動機２の回路を切替えるものである。That is, a relay 30 is installed between the circuit of the electric motor 2 and the power supply 27, and the circuit of the electric motor 2 is switched according to the power supply voltage by this relay 30.

第７図は、リレー３０の構造を示すものである。FIG. 7 shows the structure of the relay 30.

すなわち、合成樹脂製ベース３１とカバー３３で形成さ
れたケース３３内には、電磁石３４が設置され、後述す
るリレー３０の励磁回路４７の両端は、巻線の端子３５
．３６に各々接続されるものである。That is, an electromagnet 34 is installed in a case 33 formed of a synthetic resin base 31 and a cover 33, and both ends of an excitation circuit 47 of a relay 30, which will be described later, are connected to terminals 35 of a winding.
．． 36, respectively.

また、支持体３７には、磁性金属よりなる吸引板３８が
シーソー形に支持され、一端が引張ばね３９で引張られ
ている。Further, a suction plate 38 made of magnetic metal is supported in a seesaw shape on the support body 37, and one end is pulled by a tension spring 39.

一方、吸引板３８の他端は、前記電磁石３４の極４０に
対面し、上面には、絶縁体４１を介して導電性のレバー
４２が取付けられ、このレバー４２の一端は、リード線
４３を介して端子４４に接続されている。On the other hand, the other end of the suction plate 38 faces the pole 40 of the electromagnet 34, and a conductive lever 42 is attached to the upper surface via an insulator 41. One end of this lever 42 is connected to a lead wire 43. The terminal 44 is connected to the terminal 44 through the terminal 44.

さらに、レバー４２！７）他端は、端子４５と端子４６
との間に位置している。Furthermore, the other end of the lever 42!7) has a terminal 45 and a terminal 46.
It is located between.

さきに述べた巻線の端子３５と端子３６との間の励磁回
路４７に加えられる電圧がリレー３０の動作電圧（例え
ば１２０Ｖ）よシ低い場合（例えばｌｌ０Ｖ）には、電
磁石３４の吸引力は、引張ばね３９によるモーメント力
より小さいので、リレー３０は第７図の状態を保ってい
る。この時の簡略等価回路を示すものが第８図であシ、
端子４４と端子４５はレバー４２を介して電気的に導通
を保っている。When the voltage applied to the excitation circuit 47 between the terminals 35 and 36 of the winding mentioned above is lower than the operating voltage of the relay 30 (for example 120V) (for example 10V), the attractive force of the electromagnet 34 is , is smaller than the moment force exerted by the tension spring 39, so the relay 30 maintains the state shown in FIG. Figure 8 shows the simplified equivalent circuit at this time.
The terminal 44 and the terminal 45 maintain electrical continuity via the lever 42.

端子３５と端子３６の間の励磁回路４７に加えられる電
圧が、動作電圧（前述の如（１２０Ｖ）より高い場合（
例えば２２０Ｖ）には、電磁石３４の吸引力によるモー
メント力が、引張ばね３９のモーメント力に打勝って、
吸引板３８は極４０に引きつけられ、レバー４２は端子
４６と接触し、第９図に示す等何回路のように、端子４
４と端子４６が電気的に接続される。If the voltage applied to the excitation circuit 47 between the terminals 35 and 36 is higher than the operating voltage (120V as described above)
For example, at 220 V), the moment force due to the attraction force of the electromagnet 34 overcomes the moment force of the tension spring 39,
The suction plate 38 is attracted to the pole 40, and the lever 42 contacts the terminal 46, as in the circuit shown in FIG.
4 and the terminal 46 are electrically connected.

しかして、上述した第７図〜第９図では、レバー４２が
単極のように図示されているが、このものは、さきの第
５図や第６図に示すように双極のものであυ、端子４４
，４５．４６とレバー４２とを一組として、複数組設け
れば多極のリレーが構成できるものである。Although the lever 42 is shown to be unipolar in FIGS. 7 to 9, it is bipolar as shown in FIGS. 5 and 6. υ, terminal 44
, 45, 46 and the lever 42, and by providing a plurality of sets, a multi-pole relay can be constructed.

前後したが、ここで再びさきの第５図、第６図に戻って
、本実施例に係るものを説明する。Although we have gone back and forth, we will now return to FIGS. 5 and 6 to explain the present embodiment.

本実施例では双極のリレー３０を１個のみ用いて、電圧
応動形回路自動切替式電動ポンプを構成するものである
。In this embodiment, only one bipolar relay 30 is used to configure a voltage-responsive circuit automatic switching type electric pump.

第２図で説明した電動機回路において、本実施例に係る
ものでは、主巻線（Ｎ＞１９の一端は、回路２６を経て
リレー３０の端子５１に接続され、他端は、端子５４に
つながる回路２１と、感温リレー２３を介して電源２７
の一端につながる回路２２との２つに分岐されている。In the motor circuit described in FIG. 2, in this embodiment, one end of the main winding (N>19) is connected to the terminal 51 of the relay 30 via the circuit 26, and the other end is connected to the terminal 54. Power supply 27 via circuit 21 and temperature-sensitive relay 23
The circuit 22 is branched into two, with a circuit 22 connected to one end of the circuit.

また、回路２４は端子５２に、回路２５は２つに分岐し
て、一方を端子５３に、他方は圧力スイッチ５を介して
電源２７の他端につながる。さらに、励磁回路４７は、
電源２７と電動機２の回路との間に並列接続されている
。Further, the circuit 24 is connected to the terminal 52, and the circuit 25 is branched into two, one being connected to the terminal 53 and the other being connected to the other end of the power source 27 via the pressure switch 5. Furthermore, the excitation circuit 47 is
It is connected in parallel between the power supply 27 and the circuit of the electric motor 2.

そして、端子５４と向いあう端子５６と、端子５３と向
いあう端子５５とは、回路５Ｂによって互いに接続され
ている。すなわち、回路５８は、リレー３０の端子５６
と端子５５との間を直接結ぶ回路である。A terminal 56 facing the terminal 54 and a terminal 55 facing the terminal 53 are connected to each other by a circuit 5B. That is, circuit 58 connects terminal 56 of relay 30 to
This is a circuit that directly connects the terminal 55 and the terminal 55.

第５図に示すように、電源電圧が動作電圧（前述の如く
、例えば１２０■）より低い場合（例えば、１１０■）
には、第３図の等価回路の状態を保っている。このとき
、回路５８は電源２７から電気的に遮断されており、電
圧は０で電流も流れていない。As shown in FIG. 5, when the power supply voltage is lower (for example, 110 ■) than the operating voltage (as described above, for example, 120 ■)
In this case, the state of the equivalent circuit shown in FIG. 3 is maintained. At this time, the circuit 58 is electrically cut off from the power supply 27, and the voltage is 0 and no current flows.

また、前記の回路５８において１動作電圧（上記例示の
１２０Ｖ）よシミ圧の高い電源（例えば２２０Ｖ）に接
続された場合には、第６図に示すように、励磁回路４７
に動作電圧以上の電圧が印加され、端子５２は、回路５
８の一方の端子５６と、端子５１は、同じく他方の端子
５５と接続するよりに切替わる。この切替えが両方同時
に行われる時、初めて回路５８にも電流が流れ、回路は
、さきの第４図の状態に保たれる。In addition, when the circuit 58 is connected to a power source (for example, 220V) with a higher stain voltage than the operating voltage (120V in the above example), the excitation circuit 47 is connected as shown in FIG.
A voltage higher than the operating voltage is applied to the terminal 52, and the circuit 5
Similarly, one terminal 56 of 8 and the terminal 51 are switched by connecting with the other terminal 55. Only when both of these switches are performed at the same time, current also flows in circuit 58, and the circuit remains in the state shown in FIG. 4 above.

このように、励磁回路４７に印加される電圧に応じて、
電動機２の回路が適切に、かつ自動的に接続切替えられ
、一つの電動機で２種の電源電圧に使用できる、電圧応
動形回路自動切替式電動ポンプが得られた。In this way, depending on the voltage applied to the excitation circuit 47,
A voltage-responsive circuit automatic switching electric pump was obtained in which the circuit of the electric motor 2 was properly and automatically switched, and one electric motor could be used for two types of power supply voltages.

次に、第１０図は電動井戸ポンプの揚水特性試験結果の
一例を示すもので、定格電圧が２２０■仕様のものの実
験結果を示す。この図は、電源電圧を定格電圧（前記の
２２０Ｖ）から次第に下げた場合の、揚水量と全揚程お
よび電動機軸の回転数との関係の変動状況を示している
。Next, FIG. 10 shows an example of the results of a water pumping characteristic test for an electric well pump, and shows the experimental results for a pump with a rated voltage of 220 mm. This figure shows how the relationship between the amount of pumped water, the total head, and the rotational speed of the motor shaft changes when the power supply voltage is gradually lowered from the rated voltage (220V mentioned above).

ここで、曲線ａと曲線ａ′は、それぞれ電源電圧が定格
電圧と同じ場合の揚水特性と電動機軸の回転数を示す。Here, curve a and curve a' respectively indicate the pumping characteristics and the rotation speed of the motor shaft when the power supply voltage is the same as the rated voltage.

以下、曲線ｂ−ｆおよび曲線ｂ′〜ｆ′は、それぞれ電
源電圧を定格電圧に対して１０チごとに低下させていっ
た場合の揚水特性および電動機軸の回転数の低下を示す
ものである。Below, curves b-f and curves b' to f' respectively show the pumping characteristics and the decrease in the rotational speed of the motor shaft when the power supply voltage is lowered every 10 degrees from the rated voltage. .

ここで、図中の全揚程＝Ｈにおける、電圧の低下に対応
して揚水量と締切全揚程が変化する様子を第１１図に示
す。Here, FIG. 11 shows how the amount of pumped water and the cut-off total head change in response to the voltage drop at the total head = H in the figure.

従来の電動井戸ポンプの電圧変動時の揚水特性（Ｉｕこ
の図に示すものと同様でおυ、電源電圧の低下に従って
締切全揚程および揚水量（この例では、揚程−Ｉ（の場
合を示す）は次第に低下し、定格電圧の約５０チ程度ま
でに電源電圧が下がると、はとんど揚水作用を行なわな
くなる。The pumping characteristics of a conventional electric well pump when the voltage fluctuates (Iu is similar to that shown in this figure), and as the power supply voltage decreases, the cut-off total head and pumping amount (in this example, the case of head - I is shown) The power supply voltage gradually decreases, and when the power supply voltage drops to about 50 degrees below the rated voltage, it hardly performs the pumping action.

次に、前述の第５図ないし第９図で説明した本発明実施
の井戸ポンプの場合を第１２図に示す。Next, FIG. 12 shows the case of the well pump according to the present invention explained in FIGS. 5 to 9 above.

定格電圧（前述の実施例では２２０Ｖ）から電源電圧を
低下させた場合に揚水特性が次第に低下する傾向は従来
のポンプと類似しているが、揚水量が０になる前の電圧
Ｖ（前述の実施例では１２０Ｖ）において、前記リレー
３０が前述の如くに電動機巻線を２２０■仕様から１１
０■仕様に接続切替を行なうため、電動ポンプは１１０
■側での定格運転に移り、締切全揚程および揚水量は共
に２２０ｖにおける定格運転時の場合と同等値になるま
でに揚水性能が回復する。The tendency for the pumping characteristics to gradually decrease when the power supply voltage is lowered from the rated voltage (220 V in the above example) is similar to that of conventional pumps, but the voltage V before the pumping amount reaches 0 (220 V in the above example) In the embodiment, at 120V), the relay 30 changes the motor winding from 220V to 11V as described above.
0■ In order to switch the connection according to the specifications, the electric pump is 110
Moving to the rated operation on the (2) side, the pumping performance is restored until the total cut-off head and pumping amount both reach the same values as in the rated operation at 220V.

さらに電源電圧を低下させた場合は、上述と同様に揚水
性能は漸減するが、低電圧側の定格電圧（前述の実施例
では１１０■）の約５０％（約５５ｖ）に下がるまでは
引続き揚水作用を行なう事が発明者らの実験で確認され
ている。If the power supply voltage is further lowered, the pumping performance will gradually decrease as described above, but the pumping performance will continue until it drops to about 50% (about 55V) of the rated voltage on the low voltage side (110V in the above example). It has been confirmed by the inventors' experiments that it works.

従来の電動ポンプの揚水運転可能範囲（前述第１０図の
実験では２２０■から約１１０■まで）に比べて、前述
した本発明の実施例においては、高電圧側の定格電圧（
前述例では２２０Ｖ）から低電圧側の定格電圧の約５０
チ（前述例では約５５■）までの、広範囲にわたって揚
水作用を続けるものである。Compared to the pumping operation range of conventional electric pumps (from 220 to about 110 in the experiment shown in Fig. 10), in the embodiment of the present invention described above, the rated voltage on the high voltage side (
In the example above, the voltage ranges from 220V to approximately 50V of the rated voltage on the low voltage side.
The water pumping action continues over a wide range up to 100 cm (approximately 55 cm in the above example).

従って、従来の電動ポンプに比べて使用範囲が顕著に拡
大し、特に電源電圧が変動する地域では、実用面で顕著
な効果を提供するものである。Therefore, the range of use is significantly expanded compared to conventional electric pumps, and it provides significant practical effects, especially in areas where the power supply voltage fluctuates.

なお、上述の実施例では、リレーの動作電圧を１２０Ｖ
として説明したが、本発明はこれに制限されるものでは
なく、電動機あるいはポンプの性能や、使用環境などに
応じて適切に決定されるものである。In addition, in the above embodiment, the operating voltage of the relay is 120V.
However, the present invention is not limited to this, and can be appropriately determined depending on the performance of the electric motor or pump, the usage environment, etc.

〔発明の効果〕〔Effect of the invention〕

以上、一実施例を用いて説明したように、本発明は、電
動機の巻線回路を電源電圧に応じて高電圧用あるいは低
電圧用に自動的に切替え、しかも、高電圧運転状態から
電源電圧が低下した場合でも、揚水機能が停止する前に
、電動機の巻線回路が低電圧仕様に切替わ９、揚水作用
がとぎれることなく、再び定常運転に移れるようにした
電動ポンプを提供し、高電圧定格状態から低電圧までの
広範囲にわたって、給水が連続して行なえるもので、実
用的かつ顕著な効果を提供するものである。As described above using one embodiment, the present invention automatically switches the winding circuit of a motor to high voltage or low voltage according to the power supply voltage, and also changes the power supply voltage from the high voltage operating state to To provide an electric pump in which even if the water pumping function drops, the motor's winding circuit is switched to the low voltage specification before the water pumping function stops9, allowing the pumping action to resume steady operation without interrupting the water pumping function. Water can be supplied continuously over a wide range from rated voltage to low voltage, providing practical and significant effects.

【図面の簡単な説明】[Brief explanation of the drawing]

第１図は、本発明の一実施例に係る、自動式電動ポンプ
の一部断面略示構成正面図、第２図ないし第４図は、そ
の構成の基本原理を示す回路図、第５図、第６図は、そ
の一実施例に係る電動ポンプの回路図、第７図は、その
リレーの開披断面図、第８図、第９図は、そのリレーの
等価回路図、第１０図は、電動ポンプの電源電圧低下に
対する揚水特性の変化状態図、第１１図は、従来の電動
ポンプの電源電圧低下に対する揚水特性の変化状態図、
第１２図は、本発明の一実施例による電動ポンプの、電
源電圧低下に対する揚水特性変化状態図である。 ２・・・電動機、１５・・・補助巻線、１６・・・コン
デンサ、１７・・・補助回路、１８・・・主巻線（Ｍ）
、１９・・・主巻線（Ｎ）、２７・・・電源、３０・・
・リレー、４７・・・笛　１ｆＥＪ 拓　２　ｍ 葆　３　図 楽　４１￥ｆ 酌　７　詔 某　７０　図 詰　／ｌ　図 」ｒプ　ノ２　口 電此ヤ１略τ圧　（Ｖ）FIG. 1 is a partially cross-sectional schematic front view of an automatic electric pump according to an embodiment of the present invention, FIGS. 2 to 4 are circuit diagrams showing the basic principle of the configuration, and FIG. , FIG. 6 is a circuit diagram of an electric pump according to one embodiment, FIG. 7 is an open cross-sectional view of the relay, FIGS. 8 and 9 are equivalent circuit diagrams of the relay, and FIG. 11 is a diagram showing how the pumping characteristics of a conventional electric pump changes with respect to a drop in power supply voltage; FIG.
FIG. 12 is a diagram showing how the pumping characteristics of the electric pump according to an embodiment of the present invention change with respect to a drop in power supply voltage. 2... Electric motor, 15... Auxiliary winding, 16... Capacitor, 17... Auxiliary circuit, 18... Main winding (M)
, 19... Main winding (N), 27... Power supply, 30...
・Relay, 47... flute 1fEJ taku 2m 葆 3 zuraku 41￥f cup 7 edict 70 zuzume /l fig'r puno 2 mouth electric koya 1 approximately τ pressure (V)

Claims (1)

【特許請求の範囲】[Claims] １、進相用のコンデンサと補助巻線とを直列接続した補
助回路と、２組の主巻線とを有する電動ポンプの電動機
回路における、前記補助回路と前記２組の主巻線の一方
の主巻線とを並列接続して並列回路を構成し、該並列回
路と当該２組の主巻線の他方の主巻線との接続を、並列
または直列に切替えるリレーを備え、該リレーの励磁回
路に加わる電圧が所定値よシも高い場合には前記並列回
路と前記他力の主巻線とが直列に接続され、上記励磁回
路に加わる電圧が所定値よりも低い場合には上記並列回
路と上記他方の主巻線とが並列に接続切換えされるよう
に構成し、電源電圧を前記リレーの切替動作電圧よりも
高い状態から徐々に下げた場合に、ポンプの揚水量が零
になる前に前記リレーが切替動作して、前記並列回路と
前記他方の替動作電圧を設定した事を特徴とする電圧応
動形回路自動切替式電動ポンプ。1. In a motor circuit for an electric pump having an auxiliary circuit in which a phase advance capacitor and an auxiliary winding are connected in series, and two sets of main windings, one of the auxiliary circuit and the two sets of main windings. The main windings are connected in parallel to form a parallel circuit, and a relay is provided to switch the connection between the parallel circuit and the other main winding of the two sets of main windings to parallel or series, and excitation of the relay. When the voltage applied to the circuit is higher than a predetermined value, the parallel circuit and the main winding of the external power are connected in series, and when the voltage applied to the excitation circuit is lower than the predetermined value, the parallel circuit is connected in series. and the other main winding mentioned above are configured to be connected and switched in parallel, and when the power supply voltage is gradually lowered from a state higher than the switching operating voltage of the relay, before the water pumping amount of the pump becomes zero. 1. A voltage-responsive circuit automatic switching type electric pump, characterized in that said relay switches to set switching operating voltages of said parallel circuit and said other circuit.