KR101804146B1 - Pump controlled by digital signal AND control method for pumping rate - Google Patents

Abstract

The solenoid pump includes a pump drive signal generator for generating a pump drive signal in binary form by receiving a discharge amount signal in a decimal form; And a plurality of pumps selectively performing a pumping operation according to the control of the pump driving signal.
Wherein the plurality of pumps are configured to perform a pumping operation in accordance with the control of the pump driving signal having a plurality of digits, wherein each of the pumps is configured to have a different discharge capacity, And is operated under independent control of the corresponding signal.

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention [0001] The present invention relates to a solenoid pump controlled by a digital signal,

The present invention relates to a pump, and more particularly, to a solenoid pump controlled by a digital signal and a discharge capacity control method thereof.

1 is a schematic cross-sectional view of a prior art solenoid pump.

Conventional techniques for solenoid pumps have been proposed in various ways, and a common solenoid pump is disclosed in Korean Patent Publication No. 10-2000-0073549.

When a half-wave AC power source which rectifies AC power only in one direction using a diode is applied to the induction coil, the magnetic flux in the induction coil alternates, so that the plunger supported by the compression spring the plunger reciprocates in the housing due to the force of the electromagnetic field and the compression force of the spring, thereby causing a pumping action to discharge the fluid.

Generally, a method of controlling the discharge capacity of the solenoid pump is used in accordance with the phase control of the power source.

Korean Patent Laid-Open Publication No. 10-1995-023935 entitled " Solenoid Valve Control Circuit of a Fan-heater "discloses a fan heater configured to switch a power supply to a solenoid valve by operating a switching element under the control of a microcomputer. An interrupt signal generator for switching the microcomputer according to the applied voltage to input a pulse signal corresponding to a power supply frequency; A microcomputer for initially opening the solenoid valve by applying the supply power as it is and for maintaining the open state of the valve by controlling the phase of the power supplied to the solenoid valve by using the pulse signal applied from the interrupt signal generator; And a solenoid valve driver for controlling supply of fuel by switching power supply to the solenoid valve according to the phase control signal output from the microcomputer.

In a general solenoid pump control method, when a pulse signal corresponding to a frequency of a power source is inputted, it is determined whether a predetermined time (delay time) has elapsed from the input of the pulse. When a predetermined time has elapsed, a solenoid valve driving unit outputs a phase control signal And the solenoid valve driving unit switches the power supply to the solenoid valve. In addition, the discharge capacity of the solenoid valve is changed in accordance with the change in the length of the delay time.

That is, the control technique of the conventional solenoid pump is to change the discharge amount by controlling the phase of the applied power source in one cycle of the AC power source. Therefore, the power source applied to the solenoid pump always has the same waveform for each cycle if its controlled phase is the same.

According to such conventional phase control, the discharge capacity control of the solenoid pump has the following problems. There is a problem that it is difficult to control the discharge capacity at an accurate ratio because the very small solenoid pump is a metering pump.

That is, it is difficult to increase the discharge amount in proportion to the driving of the plunger according to the phase control of the power source, and the discharge amount is affected by various parameters due to the mechanical relationship between the compression spring and the plunger or friction with the periphery thereof.

Therefore, it is difficult to design a standardized discharge amount because it is difficult to see that the same discharge amount is generated in accordance with the same phase control even in the case of the same specification product produced in the same manufacturing site.

It is also very difficult to proportionally increase the discharge amount in accordance with the phase control even in a single product. That is, although it is possible to increase or decrease the discharge amount according to the phase control, it is difficult to accurately control the discharge amount.

Korean Patent Publication No. 10-1995-023935

SUMMARY OF THE INVENTION The present invention has been made in order to solve the above-mentioned technical problems, and it is an object of the present invention to provide a pump driving method and a pump driving method capable of performing a pumping operation by controlling a pump driving signal, A solenoid pump, and a solenoid pump.

According to an embodiment of the present invention, there is provided a pump driving apparatus, comprising: a pump driving signal generating unit receiving a decimal type discharge amount signal and generating a pump driving signal in a binary form; And a plurality of pumps selectively performing a pumping operation according to the control of the pump driving signal.

The plurality of pumps may be configured to perform a pumping operation according to the control of the pump driving signal having a plurality of digits, wherein each of the pumps has a different discharge capacity, And is operated under independent control of a signal corresponding to the number of digits.

The plurality of pumps may be configured to perform a pumping operation according to the control of the pump driving signal having a plurality of digits, wherein each of the pumps has a different discharge capacity, Wherein the pump having the number of digits of the pump driving signal corresponding to '1' performs the pumping operation in the independent operation of the signal corresponding to the number of digits.

The plurality of pumps may perform a pumping operation in accordance with the control of the pump driving signal having a plurality of digits, wherein each pump is controlled independently of a signal corresponding to each digit of the pump driving signal, Each pump is configured to have a discharge capacity corresponding to a decimal conversion value of each digit value of the pump drive signal assigned thereto.

According to another embodiment of the present invention, there is provided a method for driving a pump, comprising: generating a pump driving signal in a binary form by receiving a decimal type discharge amount signal; And a plurality of pumps selectively performing a pumping operation in accordance with the control of the pump driving signal. The present invention also provides a method of controlling a discharge capacity of a solenoid pump.

The plurality of pumps may be configured to perform a pumping operation according to the control of the pump driving signal having a plurality of digits, wherein each of the pumps has a different discharge capacity, And is operated under independent control of a signal corresponding to the number of digits.

The plurality of pumps may be configured to perform a pumping operation according to the control of the pump driving signal having a plurality of digits, wherein each of the pumps has a different discharge capacity, Wherein the pump having the number of digits of the pump driving signal corresponding to '1' performs the pumping operation in the independent operation of the signal corresponding to the number of digits.

The plurality of pumps may perform a pumping operation in accordance with the control of the pump driving signal having a plurality of digits, wherein each pump is controlled independently of a signal corresponding to each digit of the pump driving signal, Each pump is configured to have a discharge capacity corresponding to a decimal conversion value of each digit value of the pump drive signal assigned thereto.

In the discharge capacity control method of the solenoid pump and the solenoid pump according to the embodiment of the present invention,

The pump drive signal generating unit receives the discharge amount signal in the decimal form and converts the discharge amount signal into a pump drive signal in the form of a binary number. The plurality of pumps can perform the pumping operation according to the control of the pump drive signal. At this time, the respective pumps are configured to have different discharge capacities, and the discharge capacity can be precisely controlled by controlling the pump drive signal in the binary form.

1 is a schematic cross-sectional view of a prior art solenoid pump;
2 is a block diagram of a solenoid pump according to an embodiment of the present invention;
Fig. 3 is an operational example of the solenoid pump of Fig. 2; Fig.
4 is a first exemplary view of the output stage of the pump of Fig.
Fig. 5 is a second exemplary view of the output stage of the pump of Fig. 2; Fig.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings, in order to facilitate a person skilled in the art to easily carry out the technical idea of the present invention.

2 is a block diagram of a solenoid pump 1 according to an embodiment of the present invention.

The solenoid pump 1 according to the present embodiment includes only a simple structure for clearly explaining the technical idea to be proposed.

2, the solenoid pump 1 includes a pump driving signal generating unit 100 and a plurality of pumps 200, 201, 202, and 203.

The detailed configuration and main operation of the solenoid pump 1 configured as described above will be described below.

The solenoid pump 1 according to the present embodiment is configured to be controlled with a digital signal to perform a pumping operation.

The pump driving signal generating unit 100 receives the decimal type discharging amount signal INPUT_DEC and generates a binary pump driving signal DRVCTRL_BI [0: 3].

In this embodiment, the discharge amount signal INPUT_DEC is composed of a decimal number (maximum value 15)

The pump drive signal DRVCTRL_BI [0: 3] is composed of a pump drive signal DRVCTRL_BI [0: 3] of four digits obtained by converting the discharge amount signal INPUT_DEC into a binary form.

For reference, the number of digits of the discharge amount signal INPUT_DEC and the pump driving signal DRVCTRL_BI [0: 3] is only specific for convenience of explanation, and can be freely changed according to the embodiment.

The plurality of pumps 200, 201, 202 and 203 selectively perform the pumping operation under the control of the pump drive signal DRVCTRL_BI [0: 3].

Each of the pumps 200, 201, 202, and 203 is a pump utilizing a magnetic body and an electric induction coil. When a power is applied to the induction coil, a magnetizing force is generated in the induction coil and the magnetic body reciprocates Thereby sucking and feeding the fluid. Such pumps generally have the advantage that they are simple in structure and can be downsized.

Hereinafter, the first pump 200 of the plurality of pumps 200, 201, 202, and 203 will be described in more detail.

The first pump 200 includes a pump driving unit and a pumping unit. The pump driving unit selectively transmits the driving power PWR to the pumping unit, and the pumping unit performs a pumping operation when the driving power PWR is supplied . The driving power supply (PWR) is generally an AC power supply.

The pump driving unit selectively outputs the driving power PWR under the control of the signal corresponding to the lowest digit of the pump driving signal DRVCTRL_BI [0: 3], that is, the first pump driving signal DRVCTRL_BI [0]. In this embodiment, when the value of the first pump driving signal DRVCTRL_BI [0] is '1', the driving power source PWR is outputted.

In the present embodiment, a signal corresponding to the lowest digit of the pump driving signal DRVCTRL_BI [0: 3] is referred to as a first pump driving signal DRVCTRL_BI [0], and a signal corresponding to a higher- The pump drive signal DRVCTRL_BI [1], the third pump drive signal DRVCTRL_BI [2], and the fourth pump drive signal DRVCTRL_BI [3].

The plurality of pumps 200, 201, 202 and 203 perform a pumping operation under the control of a pump drive signal DRVCTRL_BI [0: 3] having a plurality of digits, wherein each pump is driven by the pump drive signal DRVCTRL_BI [0: And is configured to operate under independent control of the signal corresponding to the number of digits.

That is, the first pump 200 performs the pumping operation under the control of the first pump driving signal DRVCTRL_BI [0], and the second pump 201 performs the control of the second pump driving signal DRVCTRL_BI [1] And the third pump 202 performs the pumping operation under the control of the third pump driving signal DRVCTRL_BI [2], and the fourth pump 203 performs the pumping operation according to the fourth pump driving signal DRVCTRL_BI [2] [3]).

At this time, it is preferable that each pump has a different discharge capacity. In this embodiment, each pump corresponds to the decimal conversion value of each digit value of the pump drive signal DRVCTRL_BI [0: 3] As shown in Fig.

That is, the first pump 200 is a pump drive signal (DRVCTRL_BI [0: 3]) and has the discharge capacity corresponding to the decimal converted value, i.e., ²⁰ (1) of the lowest digit of the.

The second pump 201 has the discharge capacity corresponding to the next higher digit decimal conversion value of the pump drive signal DRVCTRL_BI [0: 3], that is, ²¹ (2).

The third pump 202 has the discharge capacity corresponding to the decimal conversion value of the next higher digit of the pump drive signal DRVCTRL_BI [0: 3], that is, 2 ² (4).

The fourth pump 203 has the discharge capacity corresponding to the decimal conversion value of the highest digit of the pump drive signal DRVCTRL_BI [0: 3], that is, ²³ (8).

As a result, the first pump 200 has a discharge capacity corresponding to '1', the second pump 201 has a discharge capacity corresponding to '2', and the third pump 202 has a discharge capacity corresponding to '4' , And the fourth pump 203 has a discharge capacity corresponding to " 8 ". Here, the discharge capacity refers to the relative discharge capacity between the first to fourth pumps.

When the first pump 200 to the fourth pump 203 have different discharge capacities and are controlled by the pump drive signals DRVCTRL_BI [0: 3] of four digits, they are output from the plurality of pumps 200, 201, 202, The discharge capacity of the fluid can be adjusted in 16 steps in total.

At this time, when eight pumps having different discharge capacities are controlled by an 8-digit pump drive signal, the discharge capacity of the fluid can be adjusted to 256 steps in total.

In addition, when 10 pumps having different discharge capacities are controlled by 10-digit pump drive signals, the discharge capacity of the fluid can be adjusted to a total of 1024 steps.

3 is an operational example of the solenoid pump 1 of Fig.

Referring to FIGS. 2 and 3, the operation of the solenoid pump 1 will be described in detail.

The pump driving signal generating unit 100 receives the decimal type discharging amount signal INPUT_DEC to generate a binary pump driving signal DRVCTRL_BI [0: 3]

In this example, the pump drive signal DRVCTRL_BI [0: 3] is generated as the binary number "1101 " since the discharge amount signal INPUT_DEC is input with the decimal number" 13 ".

At this time, since the value of the first pump driving signal DRVCTRL_BI [0] is '1', the first pump 200 under the control of the first pump driving signal DRVCTRL_BI [0] And performs an operation.

Since the value of the second pump driving signal DRVCTRL_BI [1] is '0', the second pump 201 under the control of the second pump driving signal DRVCTRL_BI [1] stops the pumping operation.

Further, since the value of the third pump driving signal DRVCTRL_BI [2] is '1', the third pump 202 under the control of the third pump driving signal DRVCTRL_BI [2] And performs an operation.

Finally, since the value of the fourth pump driving signal DRVCTRL_BI [3] is '1', the fourth pump 203 under the control of the fourth pump driving signal DRVCTRL_BI [3] And performs a pumping operation.

At this time, since the first pump 200 to the fourth pump 203 are connected in parallel to each other, the total discharge capacity has 13.

4 is a first exemplary view of an output stage of the pump of FIG.

Referring to FIG. 4, a plurality of output tubes 300, 301, 302, and 303 connected to respective output stages are disposed at output ends of the plurality of pumps 200, 201, 202, and 203.

Here, it is assumed that the first pump 200, the second pump 201, the third pump 202, and the fourth pump 203 are all disposed at the same height.

A first output pipe 300 connected to the output end of the first pump 200, a second output pipe 301 connected to the output end of the second pump 201, a third output pipe connected to the output end of the third pump 202 302 and the fourth output pipe 303 connected to the output end of the fourth pump 203 are all arranged at the same height.

Particularly, since the first to third output pipes 300 to 303 are configured to have a diameter proportional to the discharge capacity of the connected pump, the pressure of the fluid passing through the first to third output pipes 300 to 303 Are all the same.

The connection pipe 400 is connected in parallel with all the ends of the first to third output pipes 300 to 303 and the minimum diameter of the connection pipe 400 is connected to the fourth output pipe 303, It is preferable to have an output value of an output tube having a diameter.

Preferably, the final output tube 500 is connected to the intermediate point of the coupling tube 400 and has the same diameter as the coupling tube 400.

Since the pressures of the fluids passing through the first to third output tubes 300 to 303 are all the same, the amount of the fluid flowing into the coupling tube 400 is kept constant.

Accordingly, when the first pump 200 to the fourth pump 203 are selectively pumped to adjust the discharge capacity, the amount of fluid output through the connection pipe 400 and the final output pipe 500 can be precisely controlled have.

Fig. 5 is a second exemplary view of the output stage of the pump of Fig. 2;

Referring to FIG. 5, a plurality of output tubes 300, 301, 302, and 303 connected to respective output stages are disposed at output ends of the plurality of pumps 200, 201, 202, and 203.

Here, it is assumed that the first pump 200, the second pump 201, the third pump 202, and the fourth pump 203 are arranged at different heights. That is, the first pump 200 is disposed at the lowest position, the second pump 201 is disposed at a position higher than the first pump 200, and the third pump 202 is disposed at a position higher than the second pump 201 And that the fourth pump 203 is disposed at a higher position than the third pump 202. In this case,

A first output pipe 300 connected to the output end of the first pump 200, a second output pipe 301 connected to the output end of the second pump 201, a third output pipe connected to the output end of the third pump 202 302 and the fourth output pipe 303 connected to the output end of the fourth pump 203 are all arranged at different heights.

Particularly, since the first to third output pipes 300 to 303 are configured to have a diameter proportional to the discharge capacity of the connected pump, the pressure of the fluid passing through the first to third output pipes 300 to 303 Are all the same.

The connection pipe 400 is connected in parallel with all the ends of the first to third output pipes 300 to 303 and the minimum diameter of the connection pipe 400 is connected to the fourth output pipe 303, That is, an output tube having the largest diameter.

Preferably, the final output tube 500 is connected to the lowest point of the coupling tube 400 and has the same diameter as the coupling tube 400. - It is preferable that the first output tube (300) and the final output tube (500) are arranged at the same height. -

Since the pressures of the fluids passing through the first to third output tubes 300 to 303 are all the same, the amount of the fluid flowing into the coupling tube 400 is kept constant.

Accordingly, when the first pump 200 to the fourth pump 203 are selectively pumped to adjust the discharge capacity, the amount of fluid output through the connection pipe 400 and the final output pipe 500 can be precisely controlled have.

As described above, the discharge capacity control method of the solenoid pump includes a step of generating a binary pump drive signal DRVCTRL_BI [0: 3] by receiving the decimal discharge amount signal INPUT_DEC, And performing the pumping operation selectively according to the control of the pump drive signal DRVCTRL_BI [0: 3].

Further, in the discharge capacity control method of the solenoid pump according to the embodiment of the present invention,

The plurality of pumps are configured to perform a pumping operation under the control of a pump drive signal DRVCTRL_BI [0: 3] having a plurality of digits, wherein each pump is configured to have a different discharge capacity, And operates independently of the signal corresponding to each digit of the signal DRVCTRL_BI [0: 3].

Further, in the discharge capacity control method of the solenoid pump according to the embodiment of the present invention,

The plurality of pumps are configured to perform a pumping operation under the control of a pump drive signal DRVCTRL_BI [0: 3] having a plurality of digits, wherein each pump is configured to have a different discharge capacity, The pump corresponding to the value of the number of digits of the pump drive signal DRVCTRL_BI [0: 3] is "1" when the pump is operated under the independent control of the signal corresponding to each digit of the signal DRVCTRL_BI [0: 3] And performs a pumping operation.

Further, in the discharge capacity control method of the solenoid pump according to the embodiment of the present invention,

The plurality of pumps perform the pumping operation under the control of the pump drive signals DRVCTRL_BI [0: 3] having a plurality of digits, and each of the pumps generates the pump drive signals DRVCTRL_BI [0: 3] , Each pump is configured to have a discharge capacity corresponding to the decimal conversion value of each digit of the pump drive signal DRVCTRL_BI [0: 3] assigned thereto .

For reference, the solenoid pump 1 can operate in a normal mode or a linear mode. The normal mode is a mode in which the same operation as described above is performed in the basic mode.

On the other hand, the linear mode is a mode for controlling the total discharge capacity of the plurality of pumps 200, 201, 202, 203 to be linearly controlled.

The linear mode may be divided into a first linear mode and a second linear mode,

First, the operation when the first linear mode is set will be described as follows.

It is assumed that after the discharge amount signal INPUT_DEC is inputted as '13', the pumping operation proceeds and a new discharge amount signal INPUT_DEC '3' is inputted.

In the first linear mode, the operation of the pump corresponding to '13' is not directly switched to the operation of the pump corresponding to '3' (normal mode) 5 - > 4 - > 3 ". At this time, if the change amount of the discharge amount signal INPUT_DEC does not exceed 20% of the existing value, the discharge capacity may be set to be immediately switched to the new value.

Next, the operation when the second linear mode is set will be described as follows.

It is assumed that after the discharge amount signal INPUT_DEC is inputted as '13', the pumping operation proceeds and a new discharge amount signal INPUT_DEC '3' is inputted.

In the second linear mode, the operation corresponding to pump 13 corresponding to '3' is not immediately switched to the operation of pump corresponding to '3' (normal mode) and corresponds to the intermediate value '8' The pump is operated under an intermediate step through the operation of the pump. - If the intermediate value is a decimal point,

That is, in the second linear mode, the linearity of the discharge capacity is lower than that of the first linear mode, but can be defined as a mode in which the conversion speed is increased.

In the discharge capacity control method of the solenoid pump and the solenoid pump according to the embodiment of the present invention,

The pump drive signal generating unit receives the discharge amount signal in the decimal form and converts the discharge amount signal into a pump drive signal in the form of a binary number. The plurality of pumps can perform the pumping operation according to the control of the pump drive signal. At this time, the respective pumps are configured to have different discharge capacities, and the discharge capacity can be precisely controlled by controlling the pump drive signal in the binary form.

Thus, those skilled in the art will appreciate that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. It is therefore to be understood that the embodiments described above are to be considered in all respects only as illustrative and not restrictive. The scope of the present invention is defined by the appended claims rather than the detailed description and all changes or modifications derived from the meaning and scope of the claims and their equivalents are to be construed as being included within the scope of the present invention do.

100: pump drive signal generating unit
200: first pump
201: Second pump
202: Third pump
203: fourth pump

Claims (8)

A pump drive signal generating unit for receiving a decimal type discharge amount signal and generating a binary pump type drive signal; And
And a plurality of pumps selectively performing a pumping operation in accordance with the control of the pump driving signal,
Wherein the plurality of pumps perform a pumping operation under control of the pump driving signal having a plurality of digits,
Each pump is configured to have a different discharge capacity,
Wherein each pump operates independently of a signal corresponding to each digit of the pump driving signal.
delete The method according to claim 1,
Wherein the plurality of pumps comprise:
Wherein in performing the pumping operation according to the control of the pump driving signal having a plurality of digits,
Each pump is configured to have a different discharge capacity,
Each of the pumps is operated under independent control of a signal corresponding to each digit of the pump driving signal, and a pump whose number of digits of the pump driving signal is '1' performs a pumping operation Solenoid pump.
The method according to claim 1,
Wherein the plurality of pumps comprise:
Wherein in performing the pumping operation according to the control of the pump driving signal having a plurality of digits,
Wherein each pump is operated under independent control of a signal corresponding to each digit of the pump driving signal,
Wherein each pump is configured to have a discharge capacity corresponding to a decimal conversion value of each digit value of the pump drive signal assigned to the pump.
Generating a pump drive signal in the form of a binary number by receiving a decimal type discharge amount signal; And
And a plurality of pumps selectively performing a pumping operation in accordance with the control of the pump driving signal,
Wherein the plurality of pumps comprise:
Wherein in performing the pumping operation according to the control of the pump driving signal having a plurality of digits,
Each pump is configured to have a different discharge capacity,
Wherein each pump operates independently of a signal corresponding to each digit of the pump driving signal.
delete 6. The method of claim 5,
Wherein the plurality of pumps comprise:
Wherein in performing the pumping operation according to the control of the pump driving signal having a plurality of digits,
Each pump is configured to have a different discharge capacity,
Each of the pumps is operated under independent control of a signal corresponding to each digit of the pump driving signal, and a pump whose number of digits of the pump driving signal is '1' performs a pumping operation Wherein said solenoid pump is a solenoid pump.
6. The method of claim 5,
Wherein the plurality of pumps comprise:
Wherein in performing the pumping operation according to the control of the pump driving signal having a plurality of digits,
Wherein each pump is operated under independent control of a signal corresponding to each digit of the pump driving signal,
Wherein each pump is configured to have a discharge capacity corresponding to a decimal conversion value of each digit value of the pump drive signal assigned to the pump.

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