KR20090010106U - apparatus for water pumping having inverter - Google Patents

Abstract

The present invention relates to a groundwater pumping device having an inverter that is convenient for non-experts to use. Its composition is; In the groundwater pumping device for extracting the raw water from the well (W) using the pumping motor (10) and storing it in the reservoir (6) installed on the ground, the main body is fixed to the ground and the operation panel is provided toward the front A control box (8) comprising an opening / closing door (30) connected to the main body so as to be opened and closed; As installed inside the control box (8), the information on the water level applied from the reservoir level detecting means for detecting the water level inside the well and the reservoir level sensing means for detecting the water level in the reservoir (6) It is characterized in that it comprises an inverter including a function of a soft starter for controlling the pump motor (10).

Inverter, pumping, groundwater, well, soft start, pumping motor

Description

Groundwater pumping device with inverter {apparatus for water pumping having inverter}

The present invention relates to a groundwater pumping device, and more particularly to a groundwater pumping device having an inverter that is convenient for use by non-experts.

Groundwater pumping devices are used as essential equipment in rural areas where water is not supplied. Normally, wells are pumped to depths of tens or hundreds of meters underground and pumping motors are installed inside them to draw water. The pumped ground water is distributed to each consumer after being contained in a reservoir installed adjacent to the well.

Pumped motors are installed tens or hundreds of meters deep down the well, and in the event of a breakdown, considerable labor and costs are involved. Pumping motors, which frequently start and stop repeatedly according to the reservoir water volume, are suddenly subjected to sudden loads, which is a major cause of failure of pumping motors.

The starting current of the pumping motor reaches up to 3 times or more of the rated current in the normal starting state. The sudden inflow of current causes damage to the pumping motor, the switchboard, and each part, and is caused by noise generated at the magnet contactor contacts. This has led to malfunctions of products with built-in microprocessors (eg water meters).

In order to solve this problem, if you want to adopt a commercially available inverter, the current products are manufactured under the condition of indoor use, so if you do not take any measures in case of outdoor use in poor temperature environment, the reliability of the inverter is guaranteed. You will not be able to.

In addition, the installation or operation of the inverter is complicated enough to be trained separately, so it is almost impossible for the general user to operate dozens of options through the monitor using the keypad.

Some foreign products have submersible pumps with a soft starter function, but they are only used for a limited price due to their high price.

On the other hand, when you want to check the level of the underground well, there is a lot of inconvenience because it is a situation that is measured by inserting a separate level gauge in the well.

An object of the present invention for the above problems is to provide a groundwater pumping device having an inverter dedicated pump pump that can be easily used and reliable in the field. In addition, another object of the present invention is to provide a pumping device having a water level measuring means that can easily measure the water level of the well and provide information about it in real time.

In the above object, in the groundwater pumping device for storing the raw water from the well by using a pumping motor to store in the reservoir installed on the ground,

 A control box comprising a main body fixed to the ground and an opening / closing door connected to the main body so as to open and close the operation panel toward the front; As installed inside the control box, to control the pumping water receiving the information on the water level applied from the water tank level detection means for detecting the water level inside the well and the water tank level detection means for detecting the water level in the reservoir It is achieved by a pumping device having an inverter for.

The inverter in the present invention basically has the function of a soft starter; A time adjusting knob for adjusting the starting time of the pumping motor; A speed adjusting knob for adjusting the speed of the pumping motor; An overload indicator lamp for visually indicating an overload condition; A current adjusting knob for finely adjusting the current applied to the pumping motor; Pumping motor selection button that can be set to match the capacity of the pumping motor; It characterized in that it comprises a rotation direction selection button for rotating in the reverse direction or forward direction according to the rotation direction of the pumping motor.

According to another feature of the present invention, the pipe well level detection means is achieved by a groundwater pumping device having an inverter, characterized in that the pressure sensor is fixed to the inside of the well.

According to the above configuration, there is provided a pumping device having a dedicated inverter for controlling the pumping motor is installed deep in the well. In particular, even a non-expert can be easily operated, easy to use and manage, and a pumping device with less trouble of the pumping motor is provided.

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a block diagram of a pumping apparatus according to an embodiment of the present invention. 2 is an external front view of the control box of the pumping apparatus according to the embodiment of the present invention. 3 is an internal front view of the control box of the pumping apparatus according to the embodiment of the present invention. 4 is a configuration diagram of an operation panel. 5 is a front view of an operation unit of the inverter.

First, the overall configuration of the pumping apparatus will be described with reference to FIG. 1. The well W extends from the ground G to a depth of tens or hundreds of meters. A pump pump 2 is fixedly installed at a predetermined depth inside the pipe, and a pump 4 is extended from the pump pump 2 to a reservoir 6 or a receiver installed on the ground. Reservoir tank level detection means is installed in the reservoir to generate an electrical signal according to the high or low water condition. This structure is an extremely common structure of a conventional groundwater pumping facility.

According to a feature of the invention a control box 8 is further installed between the pumping pump 2 and the reservoir 6. Inside the control box 8, an inverter 12 for controlling the pumping motor 10 of the pumping pump is installed. 2, a capacitor 14, an operation panel 16, an earth leakage breaker 18, and a terminal terminal 20 are incorporated in the control box 8 together with the inverter 12.

The condenser 14 is for stabilizing the power flowing into the control box 8, the operation panel 16 is a switch 22 for selecting the on or off of the power and the power for visually expressing the operating state Lamp 23. Further, the start display unit 24 visually expresses current, voltage, pumping amount, and the like. According to a feature of the present invention, the maneuvering display unit 24 may include a water level display item for displaying the water level of the well in real time as shown in FIG. 4.

The operation panel 16 is provided with an operation method selection button 26 for selecting whether the pump motor 10 is to be manually started or automatically started. It also has an overload lamp 28 that can display the on-off state and the overload state of the power supply. In addition, a water level display lamp 29 for displaying each level of the well (W) and the reservoir (6) may be further included.

The operation panel 16 may be installed in the opening / closing door 30 which is installed to open and close on the front surface of the main body 8a of the control box 8. Therefore, the operation panel 16 can be observed directly from the outside. The operation panel 16 may be protected by the transparent viewing window 32 so that children and the like cannot operate it. For this purpose, the opening and closing door 30 may have a double door structure. One will be for the operation panel 16 and the other will be for the inside of the control box 8 such as the inverter 12.

The control box 8 will inevitably be installed in harsh outdoor environments. According to an embodiment of the present invention, temperature correction means (not shown) may be further involved to protect each equipment inside the control box 8, for example, the condenser 14 or the inverter 12 from low or high temperatures. . The temperature correction means may allow the electric heater to operate when the external temperature is low, such as winter, and operate the blowing fan when the temperature is high, such as summer. The necessary equipment for this will be readily available to those skilled in the art.

A key feature of the present invention lies in having the control box 8 have an inverter capable of controlling the pumping motor 10. Furthermore, the inverter has a specific feature in that the configuration is simple, so that the general user can easily operate. Hereinafter, the structure or function of the inverter will be described.

The inverter 12 basically has the function of a soft starter. This is to protect the peripheral electric apparatus including the pump motor 10 against sudden start or stop of the pump motor 10. Its detailed construction or principle is no different from that of the prior art.

A distance setting function for setting the distance between the pumping motor 10 and the control box 8 and a distance setting button 34 therefor are provided. The distance between the pumping motor 10 and the control box 8 is in proportion to the load acting on the pumping motor 10.

In addition, a time adjusting knob 36 for adjusting the starting time of the pumping motor 10 is provided. According to the present invention, the operation time can be adjusted within the range of 10 to 600 seconds (sec). This is because the other range is not significant.

In addition, a speed adjusting knob 38 for adjusting the speed of the pumping motor 10 is provided. According to the present invention, the speed adjusting knob 38 allows the speed of the pumping motor 10 to be set to 80 to 100% of the maximum speed. This is because a speed lower than this causes a drastic deterioration of the pumping function and therefore does not need to be considered.

An overload lamp 28 ′ for visually displaying the overload state of the pumping motor 10 is also provided in the inverter 12.

 Pumping motor selection button 40 is provided in the form of a button that can be set to match the rated capacity (HP) of the pumping motor 10 is provided. This is a consideration to be able to use the pumping motor 10 of various specifications with the inverter 12 of one specification. Press the button "1" when using a small capacity positive motor 10 and press the button "5" when using a large capacity positive motor.

Furthermore, a current regulating knob 42 is provided to finely adjust the current applied to the pumping motor 10. Even with the same specification, there is a slight difference in operating current depending on the manufacturer. The user first sets the basic capacity of the pumping motor 10 with the pumping motor selection button 40 and then uses the current control knob 42 to turn on the pumping motor 10 until the overload lamp 28 'is turned on. It is possible to finely adjust the magnitude of the applied current.

In addition, a rotation direction selection button 44 for rotating the pumping motor 10 in the reverse direction or the forward direction according to the selection may be provided. This is also for setting the inverter 12 according to the type of pumping motor 10, to enable the use of a single-phase or three-phase pumping motor selectively. If the three-phase pumping motor is installed in the opposite direction to the pumping direction, it is necessary to change the position of two wires among the three wires and reconnect the wires. ) Will rotate in the correct direction (positive direction). According to the embodiment of the present invention, the rotation direction is expressed as 'A direction' and 'B direction' to eliminate confusion of the user about the rotation direction.

Fuses 46 may be installed to protect the device against other overcurrents or overvoltages.

The inverter installed in the pumping device of the present invention has the above functions, but one or two additional functions or vice versa will not depart from the scope of the basic technical idea of the present invention. . Since the electrical circuit of the inverter itself for the implementation of each function can be easily configured by those skilled in the art, a detailed description thereof is not necessary.

According to another embodiment of the present invention, there is further provided a pipe well level detection means fixedly installed in the well (W). According to the present embodiment, the pipe water level detecting means uses a pressure sensor 48 that can send a signal by detecting the water level by the pressure difference. The pressure sensor 48 is sufficient if one is provided along the depth of the well. According to this, the lowest water level for operating the pumping motor 10 and the highest water level for stopping the pumping motor 10 can be arbitrarily set by the user. That is, it is necessary to input the program to start the pumping motor 10 when the pressure applied from the pressure sensor 48 is P1, and input the program to stop the pumping motor 10 when the pressure applied is P2.

The pressure sensor 48 as the water level detecting means is a preferred method recommended by the present inventor, but is not limited thereto. A contact switch using an electrical principle may be used as the pipe water level detecting means. In addition, the water level sensing means is also provided in the reservoir, where the pressure sensor 48 'can be used as a matter of course.

Hereinafter, a circuit configuration of an inverter according to an embodiment of the present invention will be described with reference to the block diagram of FIG. 6. Since the contents can be understood independently from the above description, the following description will be given with new reference numerals.

The water level sensor 102 installed in the well and the water level sensor 104 installed in the reservoir apply the information about the water level to the CPU (100, CPU). The CPI 100 outputs the processed signal to the first display unit 106 for visually displaying the voltage and current and the second display unit 108 for displaying the water level of the well and the reservoir.

The CPI 100 controls a basic starting state of starting and stopping the pumping motor M by applying a signal to the feedblew control unit 110 (PWM driver, hereinafter referred to as 'PWM'). PWM 110 is the core configuration of the inverter, the rotational speed input unit 112, start time input unit 114, forward and reverse selection unit 116 of the positive motor (M), and the capacity selection unit 118 of the motor, and A signal is received from the distance input unit 120 between the pumping motor and the reservoir to control the pumping motor M. FIG. The PWM 110 sends an output signal to the positive motor M based on the input signals, and the output signal controls the positive motor M through the power modules 126, 128, and 130. The current sensor 132 senses an overcurrent to apply a signal to the CPU (100, CPU) to stop the starting of the motor. The power supply P supplies power to the entire inverter including the CPI 100 and the power modules 126, 128, and 130 through the voltage sensor 134. When the overvoltage is introduced, the voltage sensor 134 detects this and applies a signal to the CPI 100. A plurality of power modules 126, 128, 130 are provided as shown in order to variously adjust the rotational speed of the pumping motor M and the like.

1 is a block diagram of a pumping apparatus according to an embodiment of the present invention.

2 is an external front view of the control box of the pumping apparatus according to the embodiment of the present invention.

3 is an internal front view of the control box of the pumping apparatus according to the embodiment of the present invention.

4 is a configuration diagram of an operation panel.

5 is a front view of an operation unit of the inverter.

6 is a block diagram of an inverter of a pumping device according to an embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

2 ; Pump pump 4; Water pipe

6; Reservoir 8; Control box

10; Positive motor 12; inverter

14; Capacitor 16; Control panel

30; Opening and closing door 48; Pressure sensor

W; Government

Claims (6)

In the groundwater pumping device for extracting the raw water from the well (W) using the pumping motor (10) and storing it in the reservoir (6) installed on the ground, A control box (8) consisting of a main body (8a) fixed to the ground and an opening / closing door (30) connected to the main body (8a) to be provided with an operation panel (16) facing the front; As installed inside the control box (8), and the water level from the reservoir level detection means for detecting the water level in the well (W) and the reservoir level detection means for detecting the water level in the reservoir (6) Groundwater pumping device having an inverter, characterized in that it comprises an inverter having a function of a soft starter for controlling the pumping motor (10) by receiving information. 2. The inverter of claim 1, wherein the inverter comprises: a time adjusting knob (36) for adjusting the starting time of the pumping motor (10); A speed adjusting knob 38 for adjusting the speed of the pumping motor 10; An overload indicator lamp 28 for visually displaying the overload condition; A current adjusting knob 42 for finely adjusting the current applied to the pumping motor 10; Pumping motor selection button 40 that can be set to match the capacity of the pumping motor 10; Groundwater pumping device having an inverter, characterized in that it comprises a rotation direction selection button 44 for rotating the direction of rotation of the pumping motor 10 in the reverse or forward direction according to the selection. The inverter of claim 2, wherein the speed adjusting knob 38 is configured to adjust the speed of the pumping motor 10 in a range of 80 to 100% of the maximum speed of the pumping motor 10. Groundwater pumping device having a. The groundwater pumping pump having an inverter according to claim 2, wherein the time adjusting knob 36 is configured to adjust the starting time of the pump motor 10 within a range of 10 to 600 seconds (sec). Device. The groundwater pumping apparatus according to claim 1, wherein the pipe well level detecting means is a pressure sensor (48) fixedly installed in the pipe well (W). The groundwater pumping apparatus according to claim 1, wherein the operation panel includes a start display unit (24), and the start display unit (24) includes a water level display item for displaying the water level of the well as a number. .

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