WO2013169089A1

WO2013169089A1 - Device for determining time for cleaning dust collecting plate and method therefor

Info

Publication number: WO2013169089A1
Application number: PCT/KR2013/005249
Authority: WO
Inventors: 김명수; 유봉수; 강희천
Original assignee: (주)우남산업; 주식회사 우남알앤디
Priority date: 2012-05-07
Filing date: 2013-06-15
Publication date: 2013-11-14
Also published as: KR101190623B1

Abstract

A device and a method for determining a time for cleaning a dust collecting plate are disclosed. One aspect of the device for determining a time for cleaning a dust collecting plate, according to one embodiment of the present invention, relates to a dust collector comprising: an electricity detection unit for detecting a voltage and/or a current of a high-voltage generator; an average voltage/current calculation unit for calculating an average voltage and/or an average current from the voltage and/or the current detected by the electricity detection unit during a preset period; and a cleaning time determination unit for determining whether the average voltage and/or the average current calculated by the average voltage/current calculation unit exceed a preset reference voltage and/or a preset reference current.

Description

[Correction 27.06.2013] according to Rule 26. Cleaning period cleaning device and method

The present invention relates to an apparatus and method for determining a dust collecting plate cleaning time, and more particularly, to an apparatus and method for determining the dust collecting plate cleaning time using a change in voltage or current or sparks when excessive dust is accumulated in the dust collecting plate. .

Conventionally, in order to determine when to clean the dust collecting plate of the electric dust collector, the cleaning time is determined based on the driver's experience or by sensing the voltage or current values according to the dust amount of the dust collecting plate using a sensor, Since an additional device such as a sensor must be used, there is a problem that excessive installation cost is required.

Therefore, there is a need for a study on a dust collecting plate cleaning time determination device that detects sparks generated from the dust collecting plate and determines whether an excessive amount of dust has accumulated.

According to the present invention, since the cleaning state of the dust collecting plate can be determined using at least one of the average voltage and the average current of the high voltage generator without providing a separate sensor on the discharge plate and the dust collecting plate, the structure is simple and more accurate. Provided are a dust collecting plate cleaning time determining device capable of determining a cleaning time and a method thereof.

The present invention provides a more accurate and error-free cleaning time determination device and method by measuring the number of sparks generated during dust collection and determining the cleaning time according to the number of sparks.

One aspect of a dust collecting plate cleaning time determining apparatus according to an embodiment of the present invention, the dust collector for collecting the contaminants: an electrical detector for detecting at least one of the voltage and current of the high voltage generator; An average voltage / current calculator configured to calculate at least one of an average voltage and an average current from at least one of a voltage and a current detected by the electrical detector during a preset period; And a cleaning time determiner configured to determine whether at least one of the average voltage and the average current calculated by the average voltage / current calculator exceeds at least one of a preset reference voltage and a reference current. It may include.

According to another aspect of an embodiment of the present disclosure, the cleaning time determining unit may determine whether at least one of the average voltage and the average current exceeds at least one of the reference voltage and the reference current once or a predetermined number of times. have.

According to another aspect of an embodiment of the present invention, the electric detection unit inputs a signal output through a high voltage voltage distribution circuit in the high voltage generator to an analog to digital converter (ADC) via a signal control circuit. It may include a voltage measuring unit for measuring the voltage.

In yet another embodiment of the present invention, the electrical detection unit, via a signal control circuit for outputting a signal output through a current feedback sense resistor (Current feedback sense resistor) connected between the high voltage back-up circuit and the high voltage transformer in the high voltage generator. It may include a current measuring unit for measuring the current after input to the analog to digital converter (ADC).

One aspect of another embodiment of the dust collecting plate cleaning time determining apparatus according to the present invention, the electrical detection unit for detecting at least one of the voltage and current of the high voltage generator; A spark detector for detecting whether a spark is generated by using at least one of a voltage and a current of the high voltage generator; And a cleaning time determining unit determining whether the number of occurrences of the spark detected by the spark detector for a predetermined period exceeds a predetermined reference number. It may include.

According to another aspect of the embodiment of the present invention, the spark detector may include: when the number of times that the current detected by the electrical detector increases more than a preset value and the voltage decreases below the preset value exceeds the preset number of times, It can be judged that it occurred.

One aspect of an embodiment of a method for determining a dust collecting plate cleaning time according to the present invention may include: detecting, by an electrical detector, at least one of a voltage and a current of a high voltage generator; Calculating, by the average voltage / current calculating unit, at least one of the average voltage and the average current from at least one of the voltage and the current detected from the electrical detector for a predetermined time; And a cleaning time determining unit determining whether at least one of the average voltage and the average current calculated by the average voltage / current calculating unit exceeds at least one of a preset reference voltage and a reference current. It may include.

According to one embodiment of the present invention, since the cleaning state of the dust collecting plate can be determined using at least one of the average voltage and the average current of the high voltage generator without installing a separate sensor on the discharge plate and the dust collecting plate, the structure at low cost, It is possible to determine the cleaning time more simply and more accurately.

In addition, according to an embodiment of the present invention, by measuring the number of sparks generated during dust collection, and determining the cleaning time according to the number of sparks, it is possible to determine a more accurate and error-free cleaning time.

1 is a view for explaining the structure of the dust collecting plate and the dust accumulation structure.

Figure 2 is a block diagram showing the configuration of a dust collecting plate cleaning time determining apparatus according to an embodiment of the present invention.

Figure 3 is a block diagram showing the configuration of a dust collecting plate cleaning time determining apparatus according to another embodiment of the present invention.

4 is a view for explaining the configuration for measuring the voltage in accordance with an embodiment of the present invention.

5 is a diagram illustrating a voltage waveform at the time of spark generation according to an embodiment of the present invention.

6 is a view for explaining a configuration for measuring the current in accordance with an embodiment of the present invention.

7 is a diagram showing a current waveform at the time of spark generation according to an embodiment of the present invention.

8 is a view for explaining an arrangement for detecting spark generation according to an embodiment of the present invention.

9 is a flowchart illustrating a method of determining a dust collecting plate cleaning time according to an embodiment of the present invention.

Hereinafter, with reference to the contents described in the accompanying drawings will be described in detail the embodiments of the present invention. However, the present invention is not limited or limited by the embodiments. Like reference numerals in the drawings denote like elements.

Referring to FIG. 1, in the process of passing through the discharge plate 140 and the dust collecting plate 150 through the discharge plate 140 and the dust collecting plate 150 by the operation of the blower 130, the discharge hole 120 may be filtered. To be discharged. More specifically, when a high voltage is applied in the high voltage generator, a positive potential is applied to the discharge plate 140, and a negative potential is applied to the dust collecting plate 150. At this time, an ionization field is formed between the discharge plate 140 and the dust collecting plate 150, and when the particles of the polluted air sucked by the operation of the blower 130 reach the ionizing field, dust particles having a positive potential are negative. Air collected in the dust collecting plate 150 having electric potential and dust free is discharged to the discharge port 120 by the operation of the blower 130.

Here, a spark occurs when the polluted air particles of a positive potential are collected in the dust collecting plate 150 of a negative potential, and a change in voltage or current occurs in this process. Therefore, it is possible to determine whether the average voltage or current is different from the preset reference value by calculating the average voltage or current for a predetermined time, and to repeat the above process one or more times to determine the cleaning time.

Hereinafter, a more detailed configuration for determining the cleaning timing of the dust collecting plate will be described.

2 is a block diagram showing the configuration of a dust collecting plate cleaning time determining apparatus according to an embodiment of the present invention.

Referring to FIG. 2, the dust collecting plate cleaning time determining apparatus includes an electric detector 220, an average voltage / current calculator 230, and a cleaning time determiner 240.

The electrical detector 220 may detect at least one of a voltage and a current of the high voltage generator 210.

That is, the electrical detector 220 detects at least one of the voltage and the current of the high voltage generator 210 to detect a change in at least one of the voltage and the current of the high voltage generator 210 in real time. A change in at least one of the voltage and the current of the high voltage generator 210 may be used as basic data for determining the degree of contamination of the dust collecting plate, for example, the amount of pollutant attached to the dust collecting plate. To this end, the electrical detector 220, at least one of the voltage measuring unit 221 for measuring the voltage of the high voltage generator 210 and the current measuring unit 222 for measuring the current of the high voltage generator 210. It may include.

The voltage measuring unit 221 may input a signal output through a high voltage voltage distribution circuit in a high voltage generator to an A / D converter (ADC) through a signal control circuit and measure a voltage. In addition, the current measuring unit 222 transmits a signal output through a current feedback sense resistor connected between the high voltage back-up circuit and the high voltage transformer in the high voltage generator to the A / D converter through a signal control circuit. After inputting to digital converter, ADC, current can be measured.

One embodiment for measuring the voltage or current will be described in more detail below with reference to FIGS. 4 to 7.

4 is a view for explaining the configuration for measuring the voltage in accordance with an embodiment of the present invention, Figure 5 is a diagram showing a voltage waveform at the time of spark generation according to an embodiment of the present invention.

Referring to FIG. 4, the voltage detection from the high voltage generator 210 may use a high voltage voltage divider 401. The high voltage voltage divider 401 may be implemented in the high voltage generator 210. The electrostatic precipitator controller 420 may receive a signal (eg, 0 to 10V) output from the output pin of the high voltage generator 210.

The signal received by the electrostatic precipitator controller 420 may be converted into a voltage level for input into a microcontroller (Analog to digital converter) 422 in a signal conditioning circuit 421. The signal converted by the signal conditioning circuit 421 may be input to the ADC 422 to measure a voltage. As such, by detecting a change in the voltage measured by the ADC 422, it is possible to detect whether the dust collector is excessively accumulated. In this case, when the pollutant is excessively accumulated in the dust collecting plate, a spark is generated, and thus the voltage measured by the ADC 422 may be changed as shown in FIG. 5.

6 is a view for explaining a configuration for measuring the current in accordance with an embodiment of the present invention, Figure 7 is a diagram showing a current waveform at the time of spark generation according to an embodiment of the present invention.

Referring to FIG. 6, a current feedback sense resistor 401 may be used for current detection. The current feedback detection resistor 401 may be implemented in the high voltage generator 210. The current feedback detection resistor 401 measures the current by converting it into a voltage without directly using the current. Looking at the operation of the current feedback detection resistor 401, a signal (ex. 0 to 5V) output from the output pin of the high voltage generator 210 receives the signal from the electrostatic precipitator controller 420 and the signal control circuit (Signal) In a conditioning circuit 421, the microcontroller may convert the voltage to a voltage level for input to an analog-to-digital converter (ADC). The signal converted by the signal conditioning circuit 421 may be input to the ADC 422 to measure a voltage. In this case, the voltage measured by the ADC 422 may be converted into a current again. As such, by detecting a change in the current measured by the ADC 422, it is possible to detect whether the dust collector is excessively accumulated. In this case, when the pollutant is excessively accumulated in the dust collecting plate, a spark is generated, and thus the voltage measured by the ADC 422 may be changed as shown in FIG. 5.

Referring back to FIG. 2, the average voltage / current calculator 230 may calculate at least one of the average voltage and the average current from at least one of the voltage and the current of the predetermined period detected by the electrical detector 220. have. That is, since the instantaneous voltage or the instantaneous current detected by the electrical detector 220 may be somewhat inaccurate due to a measurement error or the like, the average voltage / current calculator 230 may select at least one of the average voltage and the current. By calculating, it is possible to compensate for the occurrence of a measurement error or the like.

In addition, the cleaning time determiner 240, when a predetermined time has elapsed since the dust collector is driven, and at least one of the average voltage and the average current exceeds at least one of the reference voltage and the reference current, the excess time. The timing can be determined as the cleaning timing of the dust collecting plate. That is, at least one of the average voltage and the average current may have a different value from at least one of the average voltage and the average current during normal operation during the initial driving time after the dust collector is driven. At least one of the later average voltage and the average current is compared with at least one of the reference voltage and the reference current to determine whether it is exceeded. In this case, at least one of the reference voltage and the reference current may be arbitrarily set by the administrator in consideration of at least one value of the average voltage and the current when the dust collector is not piled up excessively and is operating normally.

For example, if the reference voltage, i.e., the average voltage value during a predetermined time period (ex. 5 seconds) in which the pollutant is not excessive, is 5V, and the average voltage value measured during the dust collector operation is 8V, Since the measured average voltage value is large, it can be determined that there are too many contaminants on the current collecting plate. In this case, for accuracy of determination, at least one of the average voltage and the average current repeatedly compares at least one of the reference voltage and the reference current with the reference voltage or the current one or more times, such as a predetermined number of times (eg, five times). If it is determined that the excess is exceeded, it can be determined that the time point is the cleaning time of the dust collecting plate.

In addition, simply determining whether the average voltage or the average current is larger than the reference voltage or the current may be inaccurate. Therefore, when the average voltage value is greater than or equal to the reference voltage value (ex. ) Can be determined as the cleaning time, or only when the cleaning rate is greater than the reference voltage or current (eg, when the average voltage value is 120% or more than the reference voltage value).

As described above, when the pollutant is excessive, since a change in the voltage or current value measured by the high pressure generator occurs, it is possible to more accurately determine the cleaning time of the dust collecting plate using this.

3 is a block diagram showing the configuration of a dust collecting plate cleaning time determining apparatus according to another embodiment of the present invention. A configuration that performs the same role as the configuration described in FIG. 2 will be omitted.

Referring to FIG. 3, the dust collecting plate cleaning time determining device detects at least one of the voltage and the current of the high voltage generator, and generates a spark by using at least one change of the voltage and the current of the high voltage generator. And a spark detection unit 330 for detecting and a cleaning time determination unit 240 for determining the excess time as the cleaning time of the dust collecting plate when the number of times the spark is generated for a predetermined period exceeds a predetermined reference number. Can be.

When the contaminants are excessively attached to the dust collecting plate, the spark detecting unit 330 detects the occurrence of sparks by paying attention to the occurrence of the sparks, thereby determining whether the contaminants are excessively attached to the dust collecting plate. In this case, the spark detector 330 may use a change in at least one of voltage and current to detect spark occurrence. For example, when the number of times that the current increases more than the preset value and the voltage decreases below the preset value exceeds the preset number, it may be determined that the spark has occurred.

An example of a circuit for spark detection will be described in more detail below with reference to FIG. 8.

8 is a view for explaining a configuration for detecting spark generation according to an embodiment of the present invention.

Referring to FIG. 8, the voltage and current detection circuits described with reference to FIGS. 4 and 6 may be used to detect sparks. Spark can be detected using voltage or current. For example, a signal relating to voltage or current is input to a comparator 423 of the electrostatic precipitator controller, and when the signal input from the comparator 423 is higher or lower than a preset reference voltage, a spark is generated. I can recognize it. When the occurrence of the spark is detected a plurality of times during a predetermined time, it may be determined that there is an excessive amount of contaminants in the dust collecting plate, and for this purpose, the number of occurrences of the spark may be counted through the counter 424.

In addition to the method of determining that a spark has occurred when the voltage or current is larger or smaller than the reference voltage or the reference current as in the above example, the number of times that the current increases more than the preset value and the voltage decreases below the preset value When the number of times is exceeded, the occurrence of the spark may be determined through various methods such as determining that the spark has occurred.

Referring back to FIG. 3, the cleaning time determiner 240 may determine the cleaning time in consideration of the number of occurrences of sparks and the like. For example, when the number of sparks generated for a predetermined period (ex. 10 seconds) exceeds the preset reference number (five times), it may be determined that the spark has occurred. In other words, even if the pollutants are not accumulated excessively, sparks may occur due to various reasons such as malfunction of the equipment. can do.

As described above, in addition to the method of determining the cleaning time of the dust collecting plate by using only the change of voltage or current, it is also possible to determine the cleaning time of the dust collecting plate by detecting the occurrence of sparks, and various methods are selected and used to increase the accuracy of the judgment. Can be.

Referring to FIG. 9, first, a dust collector is driven and an initial value may be set (910, 920). Of course, the dust collector may be driven after setting the initial value. The set initial value may include various values such as a variable for counting the number of occurrences of the spark (eg, a spark counting variable n), a reference current, and a reference voltage.

Subsequently, a dust collecting operation is substantially performed by driving the dust collector. (Third Step 930) When the dust collecting operation is performed in step 930, at least one of an average voltage and an average current is calculated for a predetermined period. 940)

Next, it is determined whether the average voltage / current calculated in step 940 is greater than the preset reference voltage / current. If it is determined not to be repeated, steps 930 to 950 are repeated.

If it is determined in step 950 that the average voltage / current is greater than the preset reference voltage / current, it is determined that spark has occurred and the spark counting variable n, which is initially set, is increased by one (960).

In operation 970, it is determined whether the spark counting variable n value increased in step 960 reaches a predetermined number (ex. 5). If it is determined that it has reached, it is determined that the dust collecting plate cleaning time has arrived (980). However, if it is determined in step 970 that the spark counting variable n value does not reach a predetermined number, steps 930 to 970 are performed again. Repeat it.

As described above, by determining the cleaning time of the dust collecting plate using the voltage or current measured in the high voltage generator, by using at least one of the average voltage and the average current of the high voltage generator, without installing a separate sensor on the discharge plate and the dust collecting plate Since the cleaning state of the dust collecting plate can be determined, it is possible to determine the cleaning time more accurately and more accurately at a low cost.

In addition to the method of measuring only voltage and current, by measuring the number of sparks generated during dust collection and determining the cleaning time according to the number of sparks, a more accurate and error-free cleaning time determination device and method can be provided. have.

As described above, although one embodiment of the present invention has been described with reference to a limited embodiment and drawings, one embodiment of the present invention is not limited to the above-described embodiment, which is a general knowledge in the field of the present invention. Those having a variety of modifications and variations are possible from these descriptions. Accordingly, one embodiment of the invention should be understood only by the claims set forth below, all equivalent or equivalent modifications will be within the scope of the invention idea.

Claims

An electrical detector for detecting at least one of a voltage and a current of the high voltage generator;

An average voltage / current calculator configured to calculate at least one of an average voltage and an average current from at least one of a voltage and a current detected by the electrical detector during a preset period; And

A cleaning time determination unit determining whether at least one of the average voltage and the average current calculated by the average voltage / current calculator exceeds at least one of a preset reference voltage and a reference current; Dust collection plate cleaning time determination device comprising a.
The method of claim 1,

The cleaning point determination unit,

And determining whether at least one of the average voltage and the average current exceeds at least one of the reference voltage and the reference current once or a predetermined number of times.
The method according to claim 1 or 2,

The electrical detection unit may include a voltage measuring unit measuring a voltage after inputting a signal output through a high voltage voltage distribution circuit in the high voltage generator to an analog-to-digital converter (ADC) through a signal control circuit. Dust collecting plate cleaning time determination device characterized in that.
The method according to claim 1 or 2,

The electric detection unit,

A signal output through a current feedback sense resistor connected between the high voltage back-up circuit and the high voltage transformer in the high voltage generator is input to an analog to digital converter (ADC) via a signal control circuit. Dust collecting plate cleaning time determination device comprising a current measuring unit for measuring the current after.
An electrical detector for detecting at least one of a voltage and a current of the high voltage generator;

A spark detector for detecting whether a spark is generated by using at least one of a voltage and a current of the high voltage generator; And

A cleaning time determination unit that determines whether the number of occurrences of the spark detected by the spark detection unit for a predetermined period exceeds a predetermined reference number; Dust collection plate cleaning time determination device comprising a.
The method of claim 5,

The spark detector,

And when the number of times the current detected by the electrical detector increases by more than a predetermined value and the number of times that the voltage decreases by less than a predetermined value exceeds a predetermined number of times, it is determined that a spark has occurred.
Detecting, by the electrical detector, at least one of a voltage and a current of the high voltage generator;

Calculating, by the average voltage / current calculating unit, at least one of the average voltage and the average current from at least one of the voltage and the current detected from the electrical detector for a predetermined time; And

Determining, by the cleaning point determining unit, whether at least one of the average voltage and the average current calculated by the average voltage / current calculating unit exceeds at least one of a preset reference voltage and a reference current; Dust collecting plate cleaning time determination method comprising a.