JP2022003234A - Water supply device - Google Patents

Abstract

To disclose an example of a water supply device which can cope with occurrence of abnormality in a power source.SOLUTION: A water supply device includes a monitoring unit 30 for switching between the case where an electric current is supplied from a first power source Ps1 to a control unit CTL and the case where the electric current is supplied from a second power source Ps2 to the control unit CTL. Thereby, the electric current can be supplied to the control unit CTL from the second power source Ps2 even when abnormality occurs in the first power source Ps1. The water supply device further includes a third power source Ps3 for supplying the electric current to the monitoring unit 30; therefore, the monitoring unit 30 can be certainly operated.SELECTED DRAWING: Figure 2

Description

The present disclosure relates to a water supply device.

For example, the water supply device described in Patent Document 1 includes a plurality of water supply units, and at least a first control board and a second control board. Each water supply unit includes a pump, an electric motor, and the like.

The first control board and the second control board are control units for controlling a plurality of water supply units. Then, in the normal state, all the water supply units are controlled only by the first control board. If the first control board fails, the second control board controls all the water supply units. That is, the water supply device described in Patent Document 1 is an invention in which the reliability of the water supply device is enhanced by providing a second control board as a backup control unit in case of failure.

Japanese Patent No. 5568113

The present disclosure discloses an example of a water supply device capable of responding to an abnormality in a power supply unit.

The water supply device includes an electric pump (P) having a pump unit (Pp) and a motor unit (Pm), a control unit (CTL) that controls the operation of the electric pump (P), and a first power source for supplying electric power. When power is supplied from the unit (Ps1) and the second power supply unit (Ps2), the first power supply unit (Ps1) to the control unit (CTL), and the power is supplied from the second power supply unit (Ps2) to the control unit (CTL). It is desirable to include a monitoring unit (30) for switching between supply and a third power supply unit (Ps3) for supplying power to the monitoring unit (30).

As a result, the water supply device can supply electric power to the control unit (CTL) by the second power supply unit (Ps2) even if an abnormality occurs in the first power supply unit (Ps1). Further, since the third power supply unit (Ps3) for supplying electric power to the monitoring unit (30) is provided, the monitoring unit (30) can be reliably operated.

Incidentally, the reference numeral in each of the parentheses is an example showing a correspondence relationship with the specific configuration and the like described in the embodiment described later, and the present disclosure is not limited to the specific configuration and the like shown in the reference numeral in the parentheses. ..

It is a figure which shows the water supply device which concerns on 1st Embodiment. It is a figure which shows the power-source part which concerns on 1st Embodiment. It is a figure which shows the power-source part which concerns on 2nd Embodiment.

The following "embodiments of the invention" show an example of embodiments that belong to the technical scope of the present disclosure. That is, the matters specifying the invention described in the claims are not limited to the specific configuration, structure, etc. shown in the following embodiments.

At least one member or part described with a reference numeral is provided, except when a notice such as "one" is given. That is, if there is no notice such as "one", two or more of the members may be provided. The water supply device shown in the present disclosure comprises at least components such as members or parts described with reference numerals, as well as the illustrated structural parts.

(First Embodiment)
<1. Overview of water supply equipment>
In this embodiment, for example, an example of the water supply device according to the present disclosure is applied to a water supply device applied to a building such as a condominium or a commercial building. As shown in FIG. 1, the water supply device 1 according to the present embodiment includes at least one electric pump P, a control unit CTL, an operation board 10, a power supply board 20, and the like.

The electric pump P is an electric pump having a pump unit Pp and a motor unit Pm. The electric pump P is controlled by the control unit CTL. The control unit CTL includes at least a drive circuit (in the present embodiment, an inverter type drive circuit) IC for driving the motor unit Pm, an inverter control unit EC for controlling the drive circuit, and the like.

The control unit CTL, that is, the inverter control unit EC according to the present embodiment controls the drive frequency (also referred to as an output frequency) for driving the motor unit Pm, thereby controlling the discharge flow rate and the discharge pressure of the electric pump P. Etc. are controlled.

The detection value of the flow rate sensor FS is input to the control unit CTL. The flow rate sensor FS outputs an electric signal corresponding to the discharge flow rate of the electric pump P. The pressure sensors Ps output an electric signal corresponding to the discharge pressure of the water supply device 1.

Then, the control unit CTL controls the rotation speed of the motor unit Pm so that the detection pressure of the discharge pressure sensor Ps1 is within a predetermined pressure range. The control unit CTL stops the motor unit Pm when the detected flow rate of the flow rate sensor FS becomes equal to or lower than a predetermined flow rate.

The operation board 10 is used, for example, when an operator sets parameters and the like necessary for controlling each control unit CTL. Therefore, the operation board 10 can communicate with the control unit CTL (specifically, the inverter control unit EC).

The power supply board 20 supplies electric power to the control unit CTL (specifically, the inverter control unit EC). The drive circuit IC is supplied with power from another power supply unit (for example, a commercial power supply) without going through the power supply board 20.

<2. Power supply board>
As shown in FIG. 2, the power supply board 20 has at least a first power supply unit Ps1, a second power supply unit Ps2, a third power supply unit Ps3, a monitoring unit 30, and the like. The first power supply unit Ps1, the second power supply unit Ps2, and the third power supply unit Ps3 supply electric power.

The first power supply unit Ps1, the second power supply unit Ps2, and the third power supply unit Ps3 can output a DC voltage as an output. At least, the first power supply unit Ps1 and the second power supply unit Ps2 are power supply boards of the same use, and convert commercial AC power to output a DC voltage of a predetermined voltage.

The first power supply unit Ps1 and the second power supply unit Ps2 are power supply boards for supplying electric power to the control unit CTL. The monitoring unit 30 can switch between a case where power is supplied from the first power supply unit Ps1 to the control unit CTL and a case where power is supplied from the second power supply unit Ps2 to the control unit CTL.

Specifically, the monitoring unit 30 normally supplies electric power from the first power supply unit Ps1 to the control unit CTL. Then, when the power supplied from the first power supply unit is equal to or less than the predetermined power while the power is being supplied from the first power supply unit Ps1 (hereinafter, referred to as "abnormal time"), the first power supply unit is used. 2 Switch to the power supply from the power supply unit Ps2.

The monitoring unit 30 according to the present embodiment supplies power from the first power supply unit when the output voltage of the first power supply unit Ps1 becomes equal to or lower than the voltage input to the comparator from the third power supply unit Ps3. Is determined to be less than or equal to the predetermined power.

The monitoring unit 30 cuts off or prohibits power supply to at least the second power supply unit Ps2 while the power is being supplied from the first power supply unit Ps1. In this embodiment, while the power is being supplied from the first power supply unit Ps1, the power supply from the second power supply unit Ps2 to the control unit CTL is also cut off / prohibited as shown in FIG.

Therefore, the monitoring unit 30 permits the power supply to the second power supply unit Ps2 when the power supply from the second power supply unit Ps2 is started. This is controlled by the second power supply unit Ps2 in a state where the power supply to the second power supply unit Ps2 is cut off or prohibited even if the power supply from the second power supply unit Ps2 to the control unit CTL is permitted by the relay X1. This is because power cannot be supplied to the CTL.

The third power supply unit Ps3 supplies electric power (voltage) to the monitoring unit 30 (in FIG. 2, the comparator of the monitoring unit 30). Therefore, the third power supply unit Ps3 is sufficient as long as it is a power supply capable of supplying a voltage to the input terminal of the comparator.

The relay X1 is a switching device that performs the above switching operation when a voltage is output from the comparator. The voltage supplied from the third power supply unit Ps3 is reduced to a predetermined voltage by a resistor and then input to the comparator.

The alarm 40 is provided on the operation board 10 or the power supply board 20. The alarm 40 is an alarm that notifies when an abnormality occurs in the electric pump P. The alarm 40 notifies the occurrence of an abnormality by a buzzer, a lamp, or the like.

The alarm 40 can be supplied with electric power from both the first power supply unit Ps1 and the second power supply unit Ps2. That is, in the normal state, the electric power is supplied from the first power supply unit Ps1 to the alarm 40, and in the abnormal situation, the electric power is supplied from the second power supply unit Ps2 to the alarm 40.

<3. Features of the water supply device according to this embodiment>
The water supply device 1 includes a monitoring unit 30 that switches between a case where power is supplied from the first power supply unit Ps1 to the control unit CTL and a case where power is supplied from the second power supply unit Ps2 to the control unit CTL. As a result, even if an abnormality occurs in the first power supply unit Ps1, the second power supply unit Ps2 can supply power to the control unit CTL.

Since the water supply device 1 includes a third power supply unit Ps3 that supplies electric power to the monitoring unit 30, it is possible to reliably operate the monitoring unit 30.

The monitoring unit 30 cuts off or prohibits power supply to at least the second power supply unit Ps2 while the power is being supplied from the first power supply unit Ps1. As a result, when the second power supply unit Ps2 is not in use, the power supply of the second power supply unit Ps2 is stopped.

In the power supply board 20, the power supply board constituting the first power supply unit Ps1 and the power supply board constituting the second power supply unit Ps2 are separate, so that an abnormality occurs in the first power supply unit Ps1 or the second power supply unit Ps2. Also, the operator can easily replace either power supply board.

In the present disclosure, in preparation for the replacement work of the power supply board, a capacitor is connected to the secondary side of the relay contact X1 for short-time voltage holding in order to prevent a voltage drop at the time of switching the DC output. It may have a different configuration.

(Second Embodiment)
As shown in FIG. 3, the power supply board 20 according to the present embodiment has a configuration in which the third power supply unit Ps3 is abolished and voltage is supplied to the monitoring unit 30 (comparator) from the second power supply unit Ps2.

As a result, in the water supply device 1 according to the present embodiment, the configuration of the power supply board 20 is simplified and the failure probability is reduced.

Since the other configurations are the same as those of the power supply board 20 according to the first embodiment, the same configuration requirements and the like are designated by the same reference numerals as those of the above-described embodiment. Therefore, in this embodiment, duplicate explanations are omitted.

(Other embodiments)
In the above-described embodiment, the water supply device includes one electric pump P. However, this disclosure is not limited to this. That is, the disclosure may be, for example, a water supply device including a plurality of electric pumps P. At this time, the power supply board 20 may be shared as one, or a plurality of power supply boards 20 may be provided for each control unit CTL.

In the above-described embodiment, the power supply board constituting the first power supply unit Ps1 and the power supply board constituting the second power supply unit Ps2 are separate. However, this disclosure is not limited to this. That is, the disclosure may be, for example, a configuration in which two power supply boards are integrated.

In the above-described embodiment, the monitoring unit 30 cuts off or prohibits the power supply to at least the second power supply unit Ps2 while the power is being supplied from the first power supply unit Ps1. However, this disclosure is not limited to this.

That is, in the disclosure, for example, while power is being supplied from the first power supply unit Ps1, the power supply from the second power supply unit Ps2 to the control unit CTL is cut off / prohibited, and even during that time, the first 2 The configuration may be such that the power supply to the power supply unit Ps2 is permitted.

The alarm 40 according to the above-described embodiment can receive electric power from any of the first power supply unit Ps1 and the second power supply unit Ps2. However, this disclosure is not limited to this. That is, the disclosure may be, for example, a configuration in which the alarm 40 is abolished, or a configuration in which power is supplied to the alarm 40 from another power source.

Further, the present disclosure is not limited to the above-described embodiment as long as it conforms to the purpose of the disclosure described in the above-mentioned embodiment. Therefore, either the configuration in which at least two embodiments of the plurality of embodiments described above are combined, or the configuration requirements shown in the illustration or the configuration requirements described with reference numerals in the above-described embodiment are abolished. It may be a configured configuration.

1 ... Water supply device 10 ... Operation board 20 ... Power supply board 30 ... Monitoring unit 40 ... Alarm P ... Electric pump CTL ... Control unit Ps1 ... 1st power supply unit Ps2 ... 2nd power supply unit Ps3 ... 3rd power supply unit

Claims (5)

An electric pump having a pump part and a motor part,
A control unit that controls the operation of the electric pump and
The first power supply unit and the second power supply unit for supplying electric power,
A monitoring unit that switches between a case where power is supplied from the first power supply unit to the control unit and a case where power is supplied from the second power supply unit to the control unit.
A water supply device including a third power supply unit that supplies electric power to the monitoring unit. The monitoring unit receives power from the second power supply unit when the power supplied from the first power supply unit becomes equal to or less than a predetermined power while supplying power from the first power supply unit. The water supply device according to claim 1, wherein the supply is switched to. While the monitoring unit is supplying power from the first power supply unit, the monitoring unit prohibits power supply to the second power supply unit.
The water supply device according to claim 2, wherein the monitoring unit permits power supply to the second power supply unit when the power supply from the second power supply unit is started. An electric pump having a pump part and a motor part,
A control unit that controls the operation of the electric pump and
A first power supply unit that supplies electric power to the control unit,
A monitoring unit that monitors the status of the first power supply unit,
A second power supply unit that supplies electric power to the monitoring unit is provided.
The monitoring unit is a water supply device that supplies electric power from the second power supply unit to the control unit when the electric power supplied by the first power supply unit becomes equal to or less than a predetermined electric power. Equipped with a notification device to notify when an abnormality occurs in the electric pump.
The water supply device according to any one of claims 1 to 4, wherein the alarm can receive electric power from any of the first power supply unit and the second power supply unit.

Images