JP2017106469A5

JP2017106469A5 -

Info

Publication number: JP2017106469A5
Application number: JP2016254296A
Authority: JP
Filing date: 2016-12-27
Publication date: 2019-01-24
Anticipated expiration: 2035-12-07

Description

ポンプと、このポンプを駆動する駆動モータと、前記ポンプの吐出口側に設けられた自吸室と、この自吸室内に鉛直方向に沿って設けられた気液分離板と、前記気液分離板上方の前記自吸室内壁面であって前記自吸室の吐出孔側に設けられた凹部と、この凹部の底面側に設けられた磁気センサと、前記凹部に設けられ、前記凹部から下方へ突出する一組の突起部を有する軸受部と、前記軸受部に軸支され、流体の通流が無い時は前記気液分離板側に位置し、前記流体の通流によって前記磁気センサに近接する方向に揺動すると共に前記凹部内に収容される磁石が内蔵されたパドルと、前記磁気センサからの出力に基づいて前記駆動モータを制御する電装部とを備えていることを特徴とする。 A pump, a drive motor for driving the pump, a self-priming chamber provided on the discharge port side of the pump, a gas-liquid separation plate provided in a vertical direction in the self-priming chamber, and the gas-liquid separation A wall surface of the self-priming chamber above the plate and provided on the discharge hole side of the self-priming chamber, a magnetic sensor provided on the bottom surface side of the concave portion, and provided in the concave portion, downward from the concave portion a bearing portion having a pair of protrusions protruding, axially supported by the bearing unit, when flow of fluid body is not located in the gas-liquid separator plate side, the magnetic sensor by flow of the fluid a paddle magnet is built to be accommodated in the recess while swinging in a direction coming close, characterized in that it comprises a electric unit for controlling said drive motor based on an output from the magnetic sensor .

なお、本発明は前記実施の形態に限定されるものではなくこの他、本発明の要旨を逸脱しない範囲で種々変形実施可能であるのは勿論である。
以下に、本願出願の当初の特許請求の範囲に記載された発明を付記する。
［１］ポンプと、
このポンプを駆動する駆動モータと、
前記ポンプの吐出口側に設けられた自吸室と、
この自吸室内に鉛直方向に沿って設けられた気液分離板と、
前記気液分離板上方の前記自吸室内壁面であって前記自吸室の吐出口側に設けられた凹部と、
この凹部の底面側に設けられた磁気センサと、
前記凹部に設けられ、流体の通流方向に交差する向きに配置された揺動軸と、
この揺動軸に軸支され、前記流体の通流が無い時は前記気液分離板側に位置し、前記流体の通流によって前記磁気センサに近接する方向に揺動すると共に凹部内に収容される磁石が内蔵されたパドルと、
前記磁気センサからの出力に基づいて前記駆動モータを制御する電装部とを備えていることを特徴とする給水ユニット。
［２］前記磁気センサは、検出した磁束密度に比例した電圧を出力し、
前記電装部は、前記磁気センサの出力に基づき、前記ポンプの停止流量を設定可能であることを特徴とする［１］に記載の給水ユニット。
［３］前記電装部は、前記ポンプの複数の停止流量を選択可能であることを特徴とする［１］に記載の給水ユニット。
［４］前記自吸室の上部に設けられた貫通孔と、
この貫通孔を閉塞するダイヤフラムと、
前記貫通孔に設けられ、前記ダイヤフラムとの間に、非腐食性液体を充填した空洞部を形成すると共に、中央部に開口孔が設けられたカバー部材と、
前記開口孔の内壁面に沿って配置された円筒状のパッキンと、
このパッキンの中心に配置され、その先端側が前記空洞部側に向けて配置された圧力センサとを備えていること特徴とする［１］に記載の給水ユニット。
［５］前記電装部は、一定時間、前記圧力センサの出力電圧が一定の閾値未満の場合、圧力センサの故障と判断して、圧力センサ故障信号を出力することを特徴とする［４］に記載の給水ユニット。
［６］前記磁気センサは、前記自吸室に対し液密に、かつ、前記自吸室側の壁面が薄肉に形成されたセンサ収納部に温度センサと共に収納されていることを特徴とする［１］に記載の給水ユニット。
［７］前記電装部は、一定時間、温度センサの出力電圧が予め設定された通常の動作範囲から外れている場合温度センサの故障と判断することを特徴とする［６］に記載の給水ユニット。
［８］前記電装部は、ポンプ停止後に、前記温度センサにより測定された自吸室内温度を、基準水温として記憶し、ポンプ運転中の自吸室内温度を検出し、前記自吸室内温度が前記基準水温よりも所定の過熱温度差以上に上昇した場合、ポンプを故障停止することを特徴とする［６］に記載の給水ユニット。
［９］前記電装部は、ポンプ停止中に検出した水温が、設定された凍結防止運転温度以下に低下した場合、ポンプを間欠運転し、運転または停止中に検出した水温が、上記の凍結防止運転温度より高く設定された凍結防止運転停止温度以上になった場合、間欠運転を中止することを特徴とする［６］に記載の給水ユニット。
［１０］前記電装部は、吐出し圧力一定制御を行うインバータを有し、
前記ポンプの停止中に検出した水温が、所定の凍結防止運転温度以下に低下した場合、定格よりも低い低速運転で前記ポンプを運転し、運転中に検出した水温が、上記の凍結防止運転温度より高く設定された凍結防止運転停止温度以上になった場合、ポンプを停止するとともに、吐出し圧力が起動圧力より低下した場合は、通常の吐出し圧力一定制御運転に移行することを特徴とする［６］に記載の給水ユニット。
［１１］前記電装部は、基準水温が４０℃超であった場合、吐出し圧力または最高回転速度を低減して可変速運転することを特徴とする［１０］記載の給水ユニット。
［１２］前記磁気センサの近傍に温度センサが配置され、
前記圧力センサ、前記磁気センサ及び前記温度センサの電圧出力をデジタル化し、前記電装部との間でデジタル通信を行うことを特徴とする［４］に記載の給水ユニット。 It should be noted that the present invention is not limited to the above-described embodiment, and various modifications can be made without departing from the scope of the present invention.
Hereinafter, the invention described in the scope of claims of the present application will be appended.
[1] A pump,
A drive motor for driving the pump;
A self-priming chamber provided on the discharge port side of the pump;
A gas-liquid separation plate provided along the vertical direction in the self-priming chamber;
A concave portion provided on the discharge port side of the self-priming chamber on the wall surface of the self-priming chamber above the gas-liquid separation plate;
A magnetic sensor provided on the bottom side of the recess;
An oscillating shaft provided in the recess and arranged in a direction intersecting the fluid flow direction;
It is pivotally supported by this oscillating shaft, and is located on the gas-liquid separation plate side when there is no fluid flow. Paddles with built-in magnets,
A water supply unit comprising: an electrical component that controls the drive motor based on an output from the magnetic sensor.
[2] The magnetic sensor outputs a voltage proportional to the detected magnetic flux density,
The water supply unit according to [1], wherein the electrical unit can set a stop flow rate of the pump based on an output of the magnetic sensor.
[3] The water supply unit according to [1], wherein the electrical unit can select a plurality of stop flow rates of the pump.
[4] A through hole provided in an upper portion of the self-priming chamber;
A diaphragm that closes the through hole;
A cover member provided in the through-hole and forming a cavity filled with a non-corrosive liquid between the diaphragm and an opening hole in the center,
A cylindrical packing disposed along the inner wall surface of the opening hole;
The water supply unit according to [1], further including a pressure sensor disposed at a center of the packing and having a tip end disposed toward the cavity.
[5] In the above [4], the electrical component may determine that the pressure sensor has failed and output a pressure sensor failure signal when the output voltage of the pressure sensor is less than a certain threshold value for a certain period of time. The water supply unit described.
[6] The magnetic sensor is housed together with the temperature sensor in a sensor housing portion in which the wall surface on the side of the self-priming chamber is formed in a liquid-tight manner with respect to the self-priming chamber. The water supply unit according to 1].
[7] The water supply unit according to [6], wherein the electrical unit determines that the temperature sensor is out of order when the output voltage of the temperature sensor is out of a preset normal operating range for a certain period of time. .
[8] After stopping the pump, the electrical component stores the self-priming chamber temperature measured by the temperature sensor as a reference water temperature, detects the self-priming chamber temperature during pump operation, and the self-priming chamber temperature is [6] The water supply unit according to [6], wherein when the temperature rises to a predetermined superheat temperature difference or more than the reference water temperature, the pump is stopped due to failure.
[9] When the water temperature detected while the pump is stopped falls below the preset anti-freezing operation temperature, the electrical component section intermittently operates the pump, and the water temperature detected during operation or stop is the anti-freezing described above. The water supply unit according to [6], wherein the intermittent operation is stopped when the freeze prevention operation stop temperature is set higher than the operation temperature.
[10] The electrical component includes an inverter that performs constant discharge pressure control,
When the water temperature detected while the pump is stopped falls below a predetermined antifreeze operation temperature, the pump is operated at a low speed operation lower than the rated value, and the water temperature detected during operation is the antifreeze operation temperature. When the temperature is higher than the set anti-freezing operation stop temperature, the pump is stopped, and when the discharge pressure is lower than the start pressure, the operation is shifted to the normal discharge pressure constant control operation. The water supply unit according to [6].
[11] The water supply unit according to [10], wherein when the reference water temperature is higher than 40 ° C., the electrical component section is operated at a variable speed by reducing a discharge pressure or a maximum rotation speed.
[12] A temperature sensor is disposed in the vicinity of the magnetic sensor,
[4] The water supply unit according to [4], wherein voltage outputs of the pressure sensor, the magnetic sensor, and the temperature sensor are digitized and digital communication is performed with the electrical component.

Claims

A pump,
A drive motor for driving the pump;
A self-priming chamber provided on the discharge port side of the pump;
A gas-liquid separation plate provided along the vertical direction in the self-priming chamber;
A recess provided on the discharge hole side of the self-priming chamber on the self-priming chamber wall surface above the gas-liquid separation plate;
A magnetic sensor provided on the bottom side of the recess;
A bearing portion provided in the recess and having a pair of protrusions protruding downward from the recess ;
It is supported by the bearing unit, when flow of fluid body is not located in the gas-liquid separator plate side, housed in the recess while swinging in a direction coming close to the magnetic sensor by flow of the fluid Paddles with built-in magnets,
A water supply unit comprising: an electrical component that controls the drive motor based on an output from the magnetic sensor.

The water supply unit according to claim 1, wherein the discharge hole of the self-priming chamber is provided on a side wall of the self-priming chamber adjacent to the paddle in the rotation direction of the paddle.

The water supply unit according to claim 2, wherein the upper wall surface of the discharge hole is flush with the lower surface of the paddle when the paddle is housed in the recess.