KR20030053360A - Detector of dust filter state in fan unit - Google Patents

Abstract

PURPOSE: A sensing device of a fan unit dust filter is provided to maintain stable system cooling effect by sensing lowering of system cooling effect and letting a user know the state of the fan unit dust filter. CONSTITUTION: A sensing device of a fan unit dust filter includes a fan unit(230) including a cooling fan rotating with regular air pressure; a dust filter(235) mounted in a cooling medium inflow channel into the fan unit in operating the cooling fan; an input current monitoring part(220) detecting a wasted current wasted in the fan unit; and a comparing part(240) comparing the detected wasted current with a reference voltage value and deicing the damage state of the dust filter. Thus, stable system cooling effect is maintained by sensing that dust is accumulated to the fan unit dust filter and the flow of air is obstructed and by letting a user know the state of the fan unit dust filter.

Description

Fan unit dust filter detection device {Detector of dust filter state in fan unit}

The present invention relates to a monitoring function of a fan unit dust filter, and more particularly, to monitor a state in which a dust accumulates in the fan unit dust filter and obstructs the flow of air, thereby providing a user with a state of the dust filter of the fan unit. The present invention relates to a fan unit dust filter sensing device that maintains a stable system cooling effect.

Prior arts related to the dust filter monitoring of a fan unit include Utility Model Application No. 20-1997-42030 (hereinafter referred to).

As described in the cited literature, various devices, transfer systems, and computer-related devices that are powered by power are equipped with corresponding accessories and chips for the operation of the device. The device is operated.

In addition, a fan unit is mounted to prevent overheating caused by excessive power supply for the operation of the device or continuous use of the device for a long time. The fan unit is a type of cooling device that forcibly generates convection around the target elements and replaces the hot medium accumulated around the target elements with relatively low temperature surrounding medium. Usually, the cooling medium uses air. .

1 is a block diagram of a dust detection device of the fan unit filter surface according to the prior art.

According to Fig. 1, the cited prior art comprises a sensor transmitter 10a for emitting an optical signal around a fan unit filter surface and a sensor receiver 10b for receiving the corresponding optical signal emitted, and the sensor transmitter 10a and A sensor unit 10 for sensing a ball A located between the receivers; A recognition unit 20 for inputting an electrical signal transmitted from the sensor unit 10 to detect whether the sensor unit path state is on or off; It provides a dust detection device for the fan unit filter surface including a PC (30) configured to input the corresponding signal transmitted from the recognition unit 20 to display the state of the fan unit filter surface to the operator.

The ball A located in the center of the sensor unit mounted around the fan unit filter rises when the air pressure is strong and falls when the air pressure is weak.

If the air pressure is high, the ball rises to prevent the optical signal from passing. If the air pressure is weak, the ball descends and the optical signal passes to turn on or off the electrical signal.

Then, the electrical signal is input to the recognition unit 20, and the recognition unit 20 recognizes whether the ball A is raised or lowered by the on or off signal input from the sensor unit 10, The magnitude of the dust or other dirt proportional to the air pressure can be recognized.

When the size of the dust or the like is determined by the recognition unit 20 as described above, the PC 30 transmits the information on this to notify the user.

However, the related art described above has a disadvantage in that it is difficult to perform the original function when fine dust accumulates on the sensor unit and the ball mounted on the sensor unit. In addition, it is difficult to achieve a sufficient monitoring function for the fan unit because it can only rely on the result output limited to the part where the sensor unit is mounted.

The present invention was created to solve the above-mentioned conventional problems, an object of the present invention is to monitor the dust is accumulated in the fan unit dust filter to interfere with the flow of air to reduce the system cooling effect to reduce the dust of the fan unit It is to provide a fan unit dust filter detecting device that maintains a stable system cooling effect by informing the user of the filter condition (cleaning time, etc.).

According to one aspect of the present invention, there is provided a fan unit dust filter detecting device including: a fan unit including a cooling fan configured to rotate with a constant air pressure; A dust filter mounted on a cooling medium inflow path into the fan unit when the cooling fan is driven; An input current monitoring unit which detects a current consumption of the fan unit; And a comparison unit configured to determine a state of contamination of the dust filter by comparing the current consumption detected by the input current monitoring unit with a set reference voltage value.

1 is a block diagram of a dust detection device of the fan unit filter surface according to the prior art.

2 is a block diagram of a detection device of the dust filter of the fan unit according to the embodiment of the present invention.

Explanation of symbols on the main parts of the drawings

210: power input unit 220: input current monitoring unit

230: fan unit 235: dust filter

240: comparator 241, 242: comparator

250: display unit 251: light emitting diode

252: alarm signal generator 253: transistor

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

2 is a block diagram of an apparatus for detecting a dust filter of a fan unit according to an exemplary embodiment of the present invention.

The present embodiment detects a change in the current consumption of the cooling fan according to the degree of accumulation of dust in the dust filter while the cooling fans having the dust filter are mounted at the lower end of the fan unit. Determine when to clean up and notify the system user if necessary.

According to FIG. 2, the present embodiment includes a fan unit 230 including a cooling fan configured to rotate with a constant air pressure, and a lower portion of the fan unit 230 which is a path through which air, which is a cooling medium, flows when the cooling fan is driven. The dust filter 235 is mounted, the input current monitoring unit 220 for detecting the current consumption of the fan unit 230, the current consumption detected by the input current monitoring unit 220 is compared with the set reference voltage value And a comparator 240 configured to determine a dirty state of the filter 235.

According to the exemplary embodiment, a plurality of cooling fans may be provided in the fan unit 230 according to the capacity of the system, and the dust filter 235 may be provided according to the position of the opening through which the cooling medium is introduced into the fan unit 230. Can be mounted on the appropriate part.

In addition, to inform the user of the damage state of the power input unit 210 and the dust filter 235 determined by the comparator 240 for stably supplying the driving power of each cooling fan in the fan unit 230. The display unit 250 may be further provided.

In this configuration, each cooling fan in the fan unit 230 is driven by the power supplied from the power input unit 210 to forcibly circulate the hot medium accumulated in the surroundings due to the heat dissipated by the circuit elements in the system. Achieve effect.

Air, which is a cooling medium, flows into the inside of the fan unit 230 through the dust filter 235 from the outside due to the rotation of the cooling fan, and then convections in the system according to the induction of the cooling fan.

The power supplied by the power input unit 210 is an example of a 48V DC power supply, the input current monitoring unit 220 is the magnitude of the current on the path of the power supply from the power input unit 210 to the fan unit 230. Detect.

The interval voltage values SH + (V) and SH- (V) are used to detect the input current from the input current monitor 220 to the fan unit 230.

When a large amount of dust is accumulated in the dust filter 235, when the inflow of air is reduced, the cooling fan has a characteristic of increasing the current consumption of the cooling fan itself in order to maintain a constant air pressure.

Therefore, when dust and foreign matters are accumulated on the surface of the dust filter 235 mounted on the fan unit 230 and when it is normally clean, it detects a difference in the current consumption of the fan mounted on the fan unit 230, By comparing this, it is possible to determine the cleaning time of the dust filter mounted on the fan unit 230.

That is, the cooling fan mounted on the fan unit 230 is configured to rotate with a constant air pressure, and when the air flows smoothly, it consumes a constant normal current. Therefore, the consumption current detected by the input current monitoring unit 220 maintains a constant level. At this time, the consumption current value detected by the input current monitoring unit may be determined by the section voltage value SH (V).

However, when the air flow is blocked or reduced due to dust and foreign matter, the cooling fan increases the current consumption to maintain a constant air pressure. As a result, since the input current to the fan unit 230 is increased, the section voltage value SH (V) detected by the input current monitoring unit 220 is increased.

Then, the SH (V) value is applied to the comparator 240 and compared with the set reference voltage. The reference voltage is a voltage of 48V supplied from the power input unit 210 and is expressed as a difference between VCC and GND and is applied to the comparator 240.

In order to compare the difference between the reference voltage and the section voltage value SH (V), two comparators 241 and 242 are provided in the comparator 240. Thus, if the section voltage value SH (V) is higher than the set voltage difference compared to the reference voltage value, the dust filter 235 is determined to be dirty, and if the section voltage value SH (V) is lower than the set voltage difference compared to the reference voltage dust, It may be determined that the filter 235 is in a steady state.

Information on whether the dust filter 235 is dirty may be displayed so that the user can recognize it. The method of transmitting information according to the determination result may be implemented in various ways. In this case, a light emitting diode (LED) 251 in the display unit 250 is provided to indicate whether or not the flashing is performed or the alarm signal generator 252 is used to determine the pronunciation. Accordingly, the state of the dust filter 235 is displayed. In this case, the transistor 253 is used to turn on / off the light emitting diode 251 and the alarm signal generator 252 of the display unit 250.

Therefore, when it is determined that the dust filter 235 is damaged by the comparator 240, the transistor 253 in the display unit 250 is turned on to turn on the light emitting diode 251 of the display unit 250 and to generate an alarm signal generator ( 252) is turned on to send an alarm signal.

On the other hand, when it is not determined that the dust filter 235 is damaged, the transistor 253 is turned off to turn off the light emitting diode 251 and the alarm signal generator 252, and if necessary, sends a normal operation signal to the outside. do.

The embodiments described above are within the scope of various changes, modifications, and equivalents of the present invention. Therefore, the present invention is not limited to the description of the examples.

According to the detection unit of the fan unit dust filter of the present invention, the user can directly determine the state of the dust filter by determining the appropriate cleaning time of the dust filter and informing the system user of the dust filter according to whether the current consumption required for driving the fan is variable. Eliminate the hassle of checking or performing irregular dust removal operations and maintaining a stable system cooling effect.

Claims (3)

A fan unit including a cooling fan configured to rotate with a constant air pressure; A dust filter mounted on a cooling medium inflow path into the fan unit when the cooling fan is driven; An input current monitoring unit which detects a current consumption of the fan unit; And a comparator configured to determine a state of contamination of the dust filter by comparing the current consumption detected by the input current monitor with a set reference voltage value. The method of claim 1, And generating a set reference voltage and applying it to each cooling fan in the fan unit via the input current monitoring unit, and further comprising a power input unit for applying the reference voltage to the comparison unit. Sensing device. The method of claim 1, And a display unit for notifying a user of information on a dirty state of the dust filter determined by the comparison unit.