KR20150120246A - Apparatus for measuring amount of accumulated dust infilter - Google Patents

Apparatus for measuring amount of accumulated dust infilter Download PDF

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Publication number
KR20150120246A
KR20150120246A KR1020140046270A KR20140046270A KR20150120246A KR 20150120246 A KR20150120246 A KR 20150120246A KR 1020140046270 A KR1020140046270 A KR 1020140046270A KR 20140046270 A KR20140046270 A KR 20140046270A KR 20150120246 A KR20150120246 A KR 20150120246A
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South Korea
Prior art keywords
filter
dust
ultrasonic
predetermined
ultrasonic wave
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KR1020140046270A
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Korean (ko)
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윤영훈
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윤영훈
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Priority to KR1020140046270A priority Critical patent/KR20150120246A/en
Publication of KR20150120246A publication Critical patent/KR20150120246A/en

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/0084—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours provided with safety means
    • B01D46/0086—Filter condition indicators
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N29/00—Investigating or analysing materials by the use of ultrasonic, sonic or infrasonic waves; Visualisation of the interior of objects by transmitting ultrasonic or sonic waves through the object
    • G01N29/04—Analysing solids

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  • Chemical & Material Sciences (AREA)
  • Physics & Mathematics (AREA)
  • Biochemistry (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Acoustics & Sound (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The present invention relates to an apparatus for measuring a dust accumulation amount of a filter capable of measuring the amount of dust accumulated in a filter by using ultrasonic waves, and more particularly to a filter for filtering dust in an incoming air, An ultrasonic receiver for receiving ultrasonic waves reflected or passed through the filter and outputting a predetermined signal; and an ultrasonic transmitter for receiving ultrasonic waves reflected or passed through the filter, And a control unit for outputting a control signal of the ultrasonic wave receiving unit and receiving a predetermined signal outputted from the ultrasonic wave receiving unit and determining a replacement timing of the filter.

Description

TECHNICAL FIELD [0001] The present invention relates to an apparatus for measuring a dust accumulation amount of a filter,

The present invention relates to an apparatus for measuring a dust accumulation amount of a filter, and more particularly to a dust accumulation amount measuring apparatus for a filter capable of measuring the amount of dust accumulated in a filter by using ultrasonic waves.

Background Art [0002] Generally, household appliances including a processor for sucking indoor air including dust, such as an air cleaner and a vacuum cleaner, have a function of filtering dust. In the case of an air cleaner, there is a filter system, a precipitation system using water, and an electric dust collection system.

Until now, most air purifiers have used sedimentation method or electrostatic dust collection method using water, but the sedimentation method using water is a method of depositing contaminants by contacting the inhaled air with water. When water is used, Dust can be effectively collected, but if water management is neglected, bacterial growth may occur in the water. Add a disinfectant to the water. As such, the precipitation method using water is advantageous because it uses water, but it is also difficult to manage.

The electric dust collection system uses the electric discharge principle and purifies the contaminated air by the dust collecting plate having strong collecting power. An air purifier using an electric dust collection system instantaneously incinerates the suspended air of the air sucked by the electric field generated when a voltage of several thousands to tens of thousands of volts is applied to a hairdrier. Since this method removes fine dust, it is effective in a place where many fine dusts are present. However, when ozone and anion are generated, a sour smell is produced. When ozone is generated excessively, it is harmful. Such an electrostatic dust collecting type air purifier can be used semi-permanently if the dust collector is cleaned well, and there is no need to replace the filter, but if the cleaning is not performed in time, the dust dust may be discharged.

The filter method is a method of purifying polluted air by using a filter, and most of the recent air purifiers use this method.

FIG. 1 shows the structure of an air purifier using a conventional filter system. As shown in FIG. 1, when the power is applied and the fan 6 is driven by the motor 5, Is filtered while passing through the front end filter 2, the HEPA (High Efficiency Particulate Air Filter) 3 and the activated carbon filter (or the odor elimination filter) 4 and exits through the air outlet 7.

The front end filter 2 functions to filter out large dust in the air entering through the inlet 1 and the HEPA filter 3 functions to filter fine dust. The activated carbon filter 4 removes odors Function.

Of course, the air purifying function is improved to use more than four-stage filter, and in the case of high-end product, the filter of more than ten stages may be used.

The HEPA filter (3) filters fine dust less than 1 [mu] m, which is the main cause of respiratory disease, and removes 99.97% of dust having a size of 0.3 to 1 [mu m].

The filter method has the advantage of cleanly filtering out dust or impurities, but it has a disadvantage that the filter must be replaced periodically, thereby incurring an additional cost. For example, the shear filter (2) should be replaced every 6 months, and the HEPA filter (3) should be replaced every 1 to 2 years. Also, the activated carbon filter 4 and the added VOC (volatile organic compound) removing filter are replaced with the HEPA filter 3. When the filter is replaced after the filter replacement period, dust or bacteria collected in the filter It may pollute the air because it is breeding and discharging. It is therefore important to know when to replace the filter.

A method of determining the replacement time of the conventional filter includes a method of counting the accumulated cumulative operation time of the air cleaner, indicating a replacement time when a predetermined time is used, and a method of measuring the amount of dust collected in the filter by measuring the flow rate before and after the filter. In this method, the amount of dust in the air is measured and the operation time is multiplied. This is because when the surrounding environment is clean, the replacement time is increased, and when the surrounding environment is contaminated, . Such a method basically installs a dust sensor and a chemical sensor on the air cleaner, so that the additional cost is very low.

The method of measuring the flow rate includes a method of directly measuring the flow rate by installing a flow rate sensor and a method of measuring the flow rate directly by the method of measuring the flow rate of the fan when the motor of the fan generating the air flow accumulates dust on the filter, There is a method of measuring the amount of dust accumulated in the filter by measuring the load or the rotation number of the motor as described above.

However, since the method of measuring the dust accumulation amount of the conventional filter is indirect, the replacement time of the filter is not accurate.

However, as described above, the method of measuring the amount of dust accumulated in the conventional filter is an indirect method of measuring the dust accumulation amount by the operation time count and the load or rotation number of the motor, so that the replacement time of the filter is inaccurate.

Therefore, the present invention has been made to solve the above problems, and it is an object of the present invention to provide an ultrasonic diagnostic apparatus and an ultrasonic diagnostic apparatus, which are provided with an ultrasonic wave generating unit for outputting ultrasonic waves to a filter and an ultrasonic wave receiving unit for receiving ultrasonic waves reflected or passed through the filter, And an object of the present invention is to provide a device for measuring a dust accumulation amount of a filter that can determine the exact replacement timing of the filter.

According to an aspect of the present invention, there is provided an air purifier comprising: a filter for filtering dust in an incoming air; An ultrasonic generator for generating ultrasonic waves by the filter by operating with a predetermined control signal input from the outside; An ultrasound receiver for receiving ultrasound reflected or passed through the filter and outputting a predetermined signal; And a controller for outputting a predetermined control signal to the ultrasonic wave generator by a dust accumulation amount measuring signal inputted from the outside and receiving a predetermined signal outputted from the ultrasonic wave receiver and judging a replacement time of the filter. And to provide a device for measuring the dust accumulation amount of the filter.

The ultrasonic wave generating unit and the ultrasonic wave receiving unit may be located in the same direction (right or left) or opposite to each other with respect to the filter.

The ultrasonic wave receiving unit receives ultrasonic waves passing through the filter and outputs a predetermined signal, the control unit converts a predetermined signal output from the ultrasonic wave receiving unit into a predetermined value, and when the converted value is greater than a preset reference value It is possible to output data for the filter replacement to a display window provided outside or to output a predetermined sound to an external speaker.

When the ultrasonic wave receiving unit receives ultrasonic waves reflected from the filter and outputs a predetermined signal, the control unit converts a predetermined signal output from the ultrasonic wave receiving unit into a predetermined value, and when the converted value is greater than a preset reference value It is possible to output data for the filter replacement to a display window provided outside or to output a predetermined sound to an external speaker.

The control unit may measure the ultrasonic characteristics in a state in which the dust is not accumulated when the filter is replaced, measure changes in the ultrasonic characteristics based on the measured values, and use the measured ultrasonic characteristics to change the filter It can be judging.

The dust accumulation amount measurement signal input to the control unit may be a signal generated when the power is input to the apparatus, a dust accumulation amount measurement function key input signal, or a signal generated at a predetermined time set by the user.

The filter may be a HEPA (High Efficiency Particulate Air Filter).

As described in detail above, the present invention includes an ultrasonic wave generator for outputting ultrasonic waves to a filter, and an ultrasonic wave receiver for receiving ultrasonic waves reflected or passed through the filter. Thereby, it is possible to know the exact replacement timing of the filter.

BRIEF DESCRIPTION OF THE DRAWINGS Fig. 1 is an exemplary view showing a configuration of an air purifier using a conventional filter system; Fig.
2 is a block diagram of an apparatus for measuring a dust accumulation amount of a filter according to an embodiment of the present invention.
3 is a block diagram of another embodiment of the apparatus for measuring the dust accumulation amount of the filter of the present invention.

According to an aspect of the present invention, there is provided a dust collecting apparatus comprising: a filter for filtering dust in an incoming air; An ultrasonic generator for generating ultrasonic waves by the filter by operating with a predetermined control signal input from the outside; An ultrasound receiver for receiving ultrasound reflected or passed through the filter and outputting a predetermined signal; And a controller for outputting a predetermined control signal to the ultrasonic wave generator by a dust accumulation amount measuring signal inputted from the outside and receiving a predetermined signal outputted from the ultrasonic wave receiver and judging a replacement time of the filter. do.

The ultrasonic wave generating unit and the ultrasonic wave receiving unit are located in the same direction (right or left side) or opposite to each other with respect to the filter.

When the filter is replaced, the controller measures ultrasonic characteristics in a state in which no dust is accumulated, and then measures changes in ultrasonic characteristics based on the measured values. Then, And judging the timing.

A preferred embodiment of the apparatus for measuring the dust accumulation amount of the filter of the present invention having the above characteristics will now be described with reference to the accompanying drawings.

The present invention relates to an air purifier, a vacuum cleaner, and the like, in which a product including a processor that sucks indoor air containing dust and discharges dust is used to measure the amount of dust collected in the dust filter, That is the point.

Generally, when dust is collected in the filter, the portion having air between the fine fibers is filled with dust, so that not only the absorption rate of the ultrasonic wave but also the reflectance and the passing rate are changed. In the present invention, the change of the reflectance or the passing rate of the ultrasonic wave is measured, To measure the amount of accumulated dust.

Especially, the HEPA filter is made of special fibers used in semiconductor clean room. It is very dense enough to pass only about 3 pieces of dust with a size of 0.3 ~ 1.0 [㎛] due to strong adsorption force, and the size of air layer between fibers Do. The air containing only dust less than 1 [mu m] from which large dust is removed by the front filter is introduced into the HEPA filter, so that the collected dust is uniform in size, and the dust is uniformly collected according to the air flow. Therefore, the characteristics such as the reflectance and the passing rate of the ultrasonic wave are changed constantly according to the amount of the dust collected in the filter.

FIG. 2 shows a configuration of an apparatus for measuring a dust accumulation amount of a filter according to an embodiment of the present invention. As shown in the figure, the HEPA filter 3 for filtering fine dust of 1 [mu] m or less in the introduced air, and the ultrasonic wave having the intensity set by the HEPA filter 3 by a predetermined control signal inputted from the outside And an ultrasonic generator for receiving ultrasonic waves reflected by the dust collected in the HEPA filter among the ultrasonic waves output from the ultrasonic wave generator, And outputs a predetermined control signal to the ultrasonic wave generator 10 based on an externally inputted dust accumulation amount measurement signal IN and outputs a control signal to the ultrasonic wave receiver 20, And outputs predetermined data for replacement of the HEPA filter 3 to a display window (not shown) provided in the outside if the converted value is greater than a predetermined reference value, As a speaker (not shown) provided in the constitute a controller 30 for outputting a predetermined sound.

Of course, if the converted value is greater than a predetermined reference value, a phrase for replacement of the HEPA filter 3 may be displayed on the display window and a predetermined sound may be output to the speaker to inform the user of the filter replacement time.

The ultrasonic wave generator 10 and the ultrasonic wave receiver 20 must be surface-treated so that the dust is not adhered thereto, and the position should be appropriately selected. At this time, it is preferable that the ultrasonic wave generator 10 and the ultrasonic wave receiver 20 are located at a place where a large amount of dust is collected due to a large amount of flow, and a certain distance is provided so as not to disturb the flow of air.

Hereinafter, the operation of the present invention will be described.

First, when the control unit 30 outputs a predetermined control signal for driving the ultrasonic generator 10 by the dust accumulation amount measurement signal IN input from the outside, the ultrasonic generator 10 generates a control signal And outputs an ultrasound wave having a predetermined predetermined intensity to the HEPA filter 3 by a predetermined control signal outputted. Here, the externally inputted dust accumulation amount measurement signal IN may be a signal generated when a power switch is inputted to apply power to an apparatus (for example, an air purifier), and may be a function for measuring a dust accumulation amount of the filter A key input signal, or a signal generated at a measurement time set at the dust accumulation amount measurement menu (for example, every day at 11 am), and the input signal may be determined by the manufacturer.

The ultrasonic wave receiving unit 20 receives the ultrasonic wave output from the ultrasonic wave generator 10 and having a predetermined intensity reflected by the dust collected in the HEPA filter 3 and outputs the received ultrasonic wave as an electric signal And outputs it.

The controller 30 receives the electrical signal output from the ultrasonic receiver 20 and converts the received electrical signal into a predetermined value, compares the converted value with a preset reference value, and determines the replacement time of the HEPA filter 3 . If it is determined that the converted value is greater than the preset reference value, it is determined that the amount of dust accumulated in the HEPA filter 3 is greater than the reference value for replacing the filter 3, And displays a phrase or a predetermined sound through a speaker to inform the user of the filter replacement timing.

3 is a block diagram of an apparatus for measuring the dust accumulation amount of a filter according to another embodiment of the present invention. As shown in FIG. 3, the ultrasonic receiving unit 20 includes a HEPA filter 3, And receives the intensity of ultrasonic waves passing through the HEPA filter (3).

At this time, the controller 30 compares the converted value of the electrical signal received from the ultrasonic receiver 20 and a preset reference value, and if the converted value is smaller than the predetermined value, 3) is greater than a reference value at which the filter is to be replaced, a predetermined phrase for replacing the filter is displayed on the display window provided on the outside or a predetermined sound is output through the speaker to inform the user of the filter replacement time .

Since the intensity (reflectance) of the ultrasonic wave reflected from the HEPA filter 3 or the intensity (pass rate) of the ultrasonic waves passing through the filter can be different depending on the characteristics of the filter (for example, thickness or manufacturing deviation) It is preferable to measure the ultrasonic characteristic of the filter in the initial state in which the ultrasonic wave is not accumulated and then measure the change of the ultrasonic characteristic on the basis of the measured value and determine the replacement timing of the filter by using the measured ultrasonic characteristic.

As described above, according to the present invention, the passing rate or the reflectance of the ultrasonic waves due to dust accumulated in the filter is measured, and the amount of dust accumulated in the filter is measured through the measured passing rate or the reflectance.

3: HEPA filter 10: Ultrasonic wave generator
20: ultrasound receiver 30:

Claims (7)

A filter for filtering dust in the incoming air; An ultrasonic generator for generating ultrasonic waves by the filter by operating with a predetermined control signal input from the outside; An ultrasound receiver for receiving ultrasound reflected or passed through the filter and outputting a predetermined signal; And a controller for outputting a predetermined control signal to the ultrasonic wave generator by a dust accumulation amount measuring signal inputted from the outside and receiving a predetermined signal outputted from the ultrasonic wave receiver and judging a replacement time of the filter. A filter for measuring the amount of dust accumulated in the filter.
The apparatus according to claim 1, wherein the ultrasonic wave generating unit and the ultrasonic wave receiving unit are located in the same direction (right or left) with respect to the filter or in directions opposite to each other.
The ultrasonic diagnostic apparatus according to claim 1, wherein, when the ultrasonic wave receiving unit receives the ultrasonic wave passing through the filter and outputs a predetermined signal, the control unit converts a predetermined signal outputted from the ultrasonic wave receiving unit into a predetermined value, Determining whether the value is less than a preset reference value, and outputting the data for the filter replacement to a display window provided outside or outputting a predetermined sound to an external speaker.
The ultrasound system of claim 1, wherein when the ultrasound receiver receives ultrasound reflected from the filter and outputs a predetermined signal, the controller converts a predetermined signal output from the ultrasound receiver into a predetermined value, Determining whether the filter is larger than a preset reference value and outputting the filter replacement data to an external display window or outputting a predetermined sound to an external speaker.
[2] The apparatus of claim 1, wherein the controller measures an ultrasonic characteristic in a state in which dust is not accumulated when the filter is replaced, measures a change in the ultrasonic characteristic on the basis of the measured value, And the filter replacement time is determined based on the time when the filter is replaced.
The dust collecting apparatus according to claim 1, wherein the dust accumulation amount measuring signal input to the controller is a signal generated when a power is input to the apparatus, a dust accumulation amount measuring function key input signal, or a signal generated at a time set by the user Of the dust accumulation amount measuring device.
The apparatus of claim 1, wherein the filter is a high efficiency particulate air filter (HEPA).
KR1020140046270A 2014-04-17 2014-04-17 Apparatus for measuring amount of accumulated dust infilter KR20150120246A (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109173456A (en) * 2018-11-19 2019-01-11 奥克斯空调股份有限公司 Air-conditioning filter net cleans reminding method and device
KR101955159B1 (en) 2018-08-09 2019-03-06 김영섭 Dust collector which can measurable dust collect volume
CN109855233A (en) * 2017-11-30 2019-06-07 深圳市美好创亿医疗科技有限公司 Filter element validation checking system and detection method
KR102450155B1 (en) 2021-06-17 2022-10-04 주식회사 에스엠전자 Air purifier equipped with relative filter contamination status check and alarm function

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109855233A (en) * 2017-11-30 2019-06-07 深圳市美好创亿医疗科技有限公司 Filter element validation checking system and detection method
KR101955159B1 (en) 2018-08-09 2019-03-06 김영섭 Dust collector which can measurable dust collect volume
CN109173456A (en) * 2018-11-19 2019-01-11 奥克斯空调股份有限公司 Air-conditioning filter net cleans reminding method and device
CN109173456B (en) * 2018-11-19 2021-01-26 奥克斯空调股份有限公司 Air conditioner filter screen cleaning prompting method and device
KR102450155B1 (en) 2021-06-17 2022-10-04 주식회사 에스엠전자 Air purifier equipped with relative filter contamination status check and alarm function

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