WO2024106742A1 - Purificateur d'air - Google Patents

Purificateur d'air Download PDF

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Publication number
WO2024106742A1
WO2024106742A1 PCT/KR2023/015019 KR2023015019W WO2024106742A1 WO 2024106742 A1 WO2024106742 A1 WO 2024106742A1 KR 2023015019 W KR2023015019 W KR 2023015019W WO 2024106742 A1 WO2024106742 A1 WO 2024106742A1
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WO
WIPO (PCT)
Prior art keywords
air
filter
air volume
calculated
control unit
Prior art date
Application number
PCT/KR2023/015019
Other languages
English (en)
Korean (ko)
Inventor
박동률
박형호
Original Assignee
엘지전자 주식회사
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 엘지전자 주식회사 filed Critical 엘지전자 주식회사
Publication of WO2024106742A1 publication Critical patent/WO2024106742A1/fr

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/10—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering
    • F24F8/108—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by separation, e.g. by filtering using dry filter elements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
    • F24F11/32—Responding to malfunctions or emergencies
    • F24F11/39—Monitoring filter performance
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F11/00—Control or safety arrangements
    • F24F11/50—Control or safety arrangements characterised by user interfaces or communication
    • F24F11/52—Indication arrangements, e.g. displays
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/80—Self-contained air purifiers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F24F2013/205—Mounting a ventilator fan therein
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/40—Pressure, e.g. wind pressure
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/52—Air quality properties of the outside air
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F2130/00—Control inputs relating to environmental factors not covered by group F24F2110/00
    • F24F2130/20—Sunlight

Definitions

  • the present invention relates to an air purifier, and more specifically, to an air purifier that can determine whether a filter is defective.
  • An air purifier is a device that creates an air flow and filters the flowing air to improve the cleanliness of the air existing in a certain space.
  • An air purifier may have a configuration in which an intake port and an outlet port are formed in a case that forms the exterior, and a filter is disposed inside the case.
  • the filter is a key component that has the greatest impact on the performance of the air purifier and management is important. However, as the filter is placed within the case, it is difficult for the user to intuitively understand and manage the status of the filter.
  • Prior Document 1 Korean Patent Publication No. 10-2016-0052304
  • the pollution detection sensor includes a light emitting unit that irradiates light toward a filter, and A light receiving part that receives the light emitted from the light emitting part is integrally provided.
  • the method of checking filter contamination by measuring the amount of light by irradiating light to the filter may cause errors depending on the relative position of the filter, and the accuracy of sensing may decrease depending on the characteristics of the usage environment.
  • Prior Document 2 (Korean Patent Publication No. 10-2004-0096833) relates to an air purifier equipped with a dust filter replacement time notification function, which detects the difference between the suction pressure and exhaust pressure of the dust filter in the purifier. It is provided with a pressure difference detection means and indicates the replacement time of the dust filter using the value detected by the pressure difference detection means.
  • the method of detecting the pressure difference between the front and rear ends of the filter may cause errors depending on the absolute pressure characteristics depending on the location (altitude) of use, and contamination of the suction side may occur.
  • the problem to be solved by the present invention is to provide an air purifier that can easily and accurately determine whether there is a filter problem.
  • Another object of the present invention is to provide an air purifier that can sense and notify an inspection notification when the filter packaging material (vinyl) is used without removing it.
  • Another object of the present invention is to provide an air purifier that can notify a filter status check when the filter is removed for maintenance such as filter cleaning and then used without reinstalling the filter.
  • an air purifier includes a case in which an air inlet and an air outlet are formed, a filter that filters out foreign substances contained in the air flowing in through the air inlet, and an inside of the case.
  • a discharge passage connected from the air inlet to the air discharge port, a blowing fan disposed on the discharge passage and flowing air from the air inlet to the air discharge port, and a pressure sensor disposed on the discharge passage to measure air pressure. , and, based on the air pressure measured by the pressure sensor, calculate the air volume, and based on the difference between the calculated air volume and the calculated air volume, determine whether to remove the packaging of the filter and whether to install the filter. It includes a control unit that does.
  • the pressure sensor measures the air pressure inside the two tubes disposed on the downstream side of the filter, and the control unit can calculate the differential pressure based on the difference in air pressure inside the two tubes.
  • the control unit may calculate a differential pressure based on measurement data received from the pressure sensor, calculate a first average value by averaging N pieces of differential pressure data, and calculate the air volume based on the first average value.
  • the control unit calculates a second average value by averaging the first half N/2 differential pressure data among the N differential pressure data, and calculates the standard deviation of the air volume using the second average value and the second half N/2 differential pressure data. .
  • the control unit may not use data measured for a predetermined time after a change in the rotational speed of the blower fan to calculate the air volume, but may calculate the air volume using air pressure data measured after the predetermined time.
  • the air purifier according to an embodiment of the present invention may further include an output unit that outputs an alarm for the determined abnormality information when it is determined that the packaging of the filter has not been removed or the filter has not been installed.
  • control unit When it is determined that the filter has not been packaged or the filter has not been installed, the control unit turns off the operation, and when there is a command to turn the operation on again, determines whether to remove the packaging of the filter again, and You can determine whether a filter is installed or not.
  • the control unit determines that the filter has not been packaged if the calculated air volume is less than the first standard value and the deviation of the calculated air volume is more than the variation standard value, and if the calculated air volume is greater than the second standard value, the calculation If the deviation of the generated air volume is greater than the variation standard value, it can be determined that the filter is not installed.
  • the second reference value may be set to be greater than the first reference value.
  • the blowing fan rotates at a rotational speed (RPM) corresponding to the current air volume mode set among the plurality of air volume modes, and the first reference value and the second reference value are set to correspond to the air volume of each of the plurality of air volume modes.
  • RPM rotational speed
  • the blower fan rotates at a rotational speed (RPM) corresponding to the current air volume mode set among the plurality of air volume modes, and the control unit calculates an air volume ratio between the air volume corresponding to the current air volume mode and the calculated air volume, If the calculated air volume ratio is less than the first air volume ratio standard value and the deviation of the calculated air volume is more than the variation standard value, it is determined that the packaging of the filter has not been removed, and if the calculated air volume ratio is greater than the second air volume ratio standard value, the calculated air volume ratio is greater than the second air volume ratio standard value. If the deviation of the air volume is greater than the variation standard value, it can be determined that the filter is not installed.
  • RPM rotational speed
  • the second air volume ratio standard value may be set to be greater than the second air volume ratio standard value.
  • the air volume corresponding to the current air volume mode may correspond to the air volume measured when an unused filter is first installed in each air volume mode.
  • an inspection notification can be notified by sensing.
  • a filter status inspection notification can be notified.
  • FIG. 1 is a perspective view of an air purifier according to an embodiment of the present invention.
  • Figure 2 is a longitudinal cross-sectional view of an air purifier according to an embodiment of the present invention.
  • Figure 3 is an exploded perspective view of a lower blower device according to an embodiment of the present invention.
  • Figure 4 is a diagram showing a structure in which a pressure sensor is assembled to a filter frame according to an embodiment of the present invention.
  • Figure 5 is an upward perspective view of the structure shown in Figure 4.
  • FIG. 6 is a block diagram of an air purifier according to an embodiment of the present invention.
  • FIG. 7 is a flowchart of an air purifier operation method according to an embodiment of the present invention.
  • FIG. 8 is a flowchart of an air purifier operation method according to an embodiment of the present invention.
  • 9 to 13 are diagrams referenced in the description of the operation of the air purifier according to the embodiment.
  • module and “part” for components used in the following description are simply given in consideration of the ease of writing this specification, and do not give any particularly important meaning or role in and of themselves. Accordingly, the terms “module” and “unit” may be used interchangeably.
  • FIG. 1 is a perspective view of the air purifier 10 viewed from above
  • FIG. 2 is a longitudinal cross-sectional view showing the internal structure of the air purifier 10.
  • the air purifier 10 may include blowers 100 and 200 that generate air flow, and a circulator 300 that changes the discharge direction of the air flow generated by the blowers 100 and 200.
  • the blowing devices 100 and 200 may include a lower blowing device 100 that discharges clean air to a lower region and an upper blowing device 200 that discharges clean air to an upper region.
  • the lower blower 100 and the upper blower 200 may be arranged in a vertical direction, and the upper blower 200 may be spaced apart from the upper side of the lower blower 100.
  • the air purifier 10 may include cases 110 and 210 that form the exterior.
  • the cases 110 and 210 may include a lower case 110 that forms the exterior of the lower blower 100 and an upper case 210 that forms the exterior of the upper blower 200.
  • the overall outer shape of the lower case 110 may be cylindrical, and the diameter of the upper part of the lower case 110 may be smaller than the diameter of the lower part.
  • a first inlet 112 through which air is sucked is formed in the lower case 110, and the first inlet 112 may be referred to as an air inlet 112 through which external air flows into the lower case 110.
  • a plurality of first suction ports 112 may be formed along the circumferential surface of the lower case 110 and may be formed to be open in up and down directions.
  • a first outlet 152 is formed at the upper part of the lower case 110 through which the introduced air is discharged to the outside, and the first outlet 152 may be formed to open upward.
  • the first outlet 152 may be called an air outlet 152 through which the air inside the lower case 110 is discharged to the outside.
  • the plurality of first intake ports 112 may be formed evenly in the circumferential direction of the lower case 110 to enable air intake in all radial directions with respect to the lower case 110.
  • a first discharge cover 150 forming a first discharge port 152 may be disposed on the upper part of the lower blower 100, and the first discharge cover 150 determines the flow direction of air flowing upward. It may be named the discharge guider 150 that guides in the discharge direction.
  • the first filter 120 is disposed to be detachable.
  • the first filter 120 may have a cylindrical shape and may filter out foreign substances contained in air introduced through the outer peripheral surface of the first filter 120.
  • the first filter frame 190 may provide a space in which the first filter 120 is removable, and may be disposed outside the first filter 120.
  • the first filter 120 may be supported by the first filter frame 190, and the first filter frame 190 may define a mounting space for the first filter 120.
  • a first fan housing 130 may be disposed above the first filter 120, and a first fan 132 rotatably disposed within the first fan housing 130, and the first fan 132 A first fan motor 134 that provides power may be disposed.
  • a circular first housing suction hole 130a may be formed on the lower side of the first fan housing 130 through which air passing through the first filter 120 flows, and the upper side may be formed by blowing air by the first fan 132.
  • a first housing discharge hole 130b through which air flows may be formed.
  • a mixed flow fan can be used as the first fan 132, and the air blown by the first fan 132 can flow outward and upward in the radial direction.
  • the first fan 132 includes a first hub 132a to which the rotation axis of the first fan motor 134 is coupled, a first shroud 132b disposed to be spaced apart from the first hub 132a, and a first It may include a plurality of first blades 132c disposed between the hub 132a and the first shroud 132b.
  • the first fan motor 134 may be coupled to the upper side of the first fan 132.
  • a first blower guider 140 may be disposed above the first fan 132 to guide the air blown by the first fan 132 upward.
  • the first blowing guider 140 may form an annular first blowing passage 140a through which air blown from the first fan 132 flows.
  • the first blowing guider 140 has a cylindrical first blowing body 142 forming the exterior, and a bowl shape disposed at the center of the first blowing body 142 into which the first fan motor 134 is inserted.
  • a plurality of first guide vanes ( 146) may be included.
  • the plurality of first guide vanes 146 may guide air discharged from the first fan 132 to the first blowing passage 140a upward.
  • Each of the plurality of first guide vanes 146 may have a curved rib shape that is arranged to stand close to the vertical axis direction.
  • the first guide vane 146 may extend from the outer peripheral surface of the first motor cover 144 to the inner peripheral surface of the first blowing body 142, and a plurality of first guide vanes 146 may be arranged to be spaced apart.
  • the rotation axis of the first fan motor 134 may extend downward from the first fan motor 134, penetrate the bottom portion of the first motor cover 144, and be connected to the first hub 132a.
  • a base 180 in contact with the ground may be disposed on the lower side of the lower case 110.
  • the base 180 may be positioned spaced downward from the lower end of the lower case 110, and a base suction part 114 through which external air flows is provided in the space between the lower case 110 and the base 180. can be formed.
  • a shielding body 160 that restricts the upward flow of air discharged from the discharge guider 150 may be disposed between the lower blower 100 and the upper blower 200. By the shielding body 160, the upper blower 200 can be positioned above the lower blower 100.
  • Shielding body 160 may extend along the air outlet 152.
  • the phrase “extends along the air outlet” can be interpreted to mean that it extends in a direction parallel to the direction in which the air outlet 152 is formed. Accordingly, the shielding body 160 may extend parallel to the direction in which the air outlet 152 is formed at a position spaced apart from the upper side of the air outlet 152.
  • the shielding body 160 may block air discharged from the lower blower 100 from flowing into the second intake port 212 of the upper blower 200.
  • the shielding body 160 may include a stem 162 connected to the lower case 110 and extending upward, and a loop 164 disposed on the upper side of the stem 162.
  • the stem 162 may extend roundly upward, and the loop 164 may extend roundly downward.
  • the stem 162 may extend upward from the discharge guider 150, and at least a portion of the stem 162 may be formed as a curved portion having a predetermined radius of curvature.
  • the discharge guider 150 of the lower blower 100 may be disposed on the lower side of the shielding body 160, and the support plate 170 on which the upper blower 200 is seated may be disposed on the upper side of the shielding body 160. there is.
  • the support plate 170 may have an annular shape and may be rounded and extended upward from the inner peripheral surface toward the outer peripheral surface.
  • the overall external shape of the upper case 210 may be cylindrical, and the diameter of the upper part of the upper case 210 may be smaller than the diameter of the lower part.
  • a second intake port 212 through which external air is sucked is formed in the upper case 210.
  • the second intake port 212 may be formed to be open in the vertical direction, and may be formed in plural numbers spaced apart in the circumferential direction.
  • the second filter 220 may also be placed on the second filter frame 290 in the upper blower 200, and this is described in the first filter 120 and first filter frame 190 described above. It can be explained in the same way as the content.
  • the first filter 120 and the second filter 220 may be equally named “filter”, and the first filter frame 190 and the second filter frame 290 may be equally named “filter frame”. You can.
  • the upper blower 200 includes a second fan 232 disposed above the second filter 220 to blow the introduced air, and a second fan motor 234 that powers the second fan 232. And, it may include a second fan housing 230 that accommodates the second fan 232.
  • the second fan 232, the second fan motor 234, and the second fan housing 230 are the first fan 132, the first fan motor 134, and the first fan housing ( 130), has the same structure and similar form, and can perform the same function.
  • the second fan 232 may be a mixed-flow fan and, like the first fan 132, may be composed of a hub 232a, a shroud 232b, and a plurality of blades 232c.
  • the upper blower 200 may further include a second blower guider 240 that is disposed above the second fan 232 and guides the air blown from the second fan 232 upward.
  • the second blowing guider 240 includes a cylindrical second blowing body 242 forming the exterior, and a bowl-shaped blowing body disposed in the center of the second blowing body 242 into which the second fan motor 234 is inserted.
  • a plurality of second guide vanes 246 spaced apart in the circumferential direction on the motor cover 244 and the second blowing passage 240a formed between the second blowing body 242 and the second motor cover 244. ) may include.
  • the second blowing body 242, the second motor cover 244, and the plurality of second guide vanes 246 are the first blowing body 142, the first motor cover 144, and the plurality of guide vanes described above. It has the same configuration and similar form as the first guide vane 146, and can perform the same function.
  • a second discharge cover 250 forming a second discharge port 252 that opens upward may be disposed on the top of the upper blower 200.
  • the second discharge port 252 may be formed in an annular shape, and a second discharge grill 258 formed in a radial shape may be disposed on the second discharge cover 250.
  • the second discharge cover 250 includes a second cover wall 254 forming a cylindrical edge, a guide base 256 disposed inside the second cover wall 254, and 2 It may include a second discharge grill 258 extending radially toward the cover wall 254.
  • the upper blower 200 includes a movable guider 260 that is rotatably disposed on the guide base 256 and supports the circulator 300, and moves along the movable guider 260 to adjust the inclination angle of the circulator 300. It may include a moving device (mover, 270) that varies.
  • the mobile guider 260 may be placed on the upper side of the guide base 256 and may be rotatably placed on the guide base 256.
  • the guide base 256 may have a disk shape, and a second discharge grill 258 may be disposed around it.
  • a space in which a moving gear 262 and a gear motor (not shown) are placed may be formed inside the moving guider 260.
  • the moving device 270 is coupled to the circulator 300 and moves along the moving guider 260 to change the inclination angle of the circulator 300.
  • the moving device 270 may include a guide plate 272 that is convexly formed toward the moving guider 260, and a gear rail 274 that engages the moving gear 262 may be formed on the guide plate 272. there is.
  • the moving device 270 can shield a portion of the suction port 310a formed in the lower part of the circulator 300.
  • An external gear 264 may be formed along the circumferential surface on one side of the moving guider 260, and a pinion gear 266 that rotates in engagement with the external gear 264 and a pinion gear on one side of the second discharge grill 258.
  • a motor 268 that rotates 266 may be arranged.
  • the inclination angle based on the vertical axis may change, and the external gear 264 and the pinion gear 266 engage and rotate. Therefore, it can be rotated in the circumferential direction using the upper and lower axes as the rotation axis.
  • the circulator 300 is disposed above the upper blower 200 and can change the wind direction of air discharged upward from the upper blower 200.
  • the circulator 300 may be arranged parallel to or inclined to the plane formed by the second discharge port 252.
  • An annular third discharge port 320a may be formed in the circulator 300, and air discharged from the upper blower 200 and introduced into the circulator 300 is discharged to the outside through the third discharge port 320a. It can be.
  • a display 390 that displays operation information of the air purifier 10 may be placed on the upper side of the circulator 300.
  • the display 390 may be disposed on the radial inner side of the third discharge opening 320a and may form the upper surface of the circulator 300.
  • the circulator 300 includes a lower cover 310 that forms the lower exterior and is connected to the upper blower 200, and an upper cover 320 that forms the upper exterior and is disposed above the lower cover 310. , a third fan 330 that flows air into the circulator 300, a fan motor 340 that rotates the third fan 330, and a motor cover 350 that accommodates the fan motor 340. , It may include a third fan housing 370 that accommodates the third fan 330, and an outer cover 380 disposed outside the upper cover 320.
  • Figure 3 is a detailed exploded view of the components arranged inside the base 180 and the lower blower 100.
  • the base 180 includes a base plate 181 that constitutes the lower part of the base 180, a base grill 182 disposed on the upper side of the base plate 181, and a lever device disposed on the upper side of the base grill 182. It may include (183) and a support device 184 disposed on the upper side of the lever device 183.
  • the base plate 181 may include an underplate 181a that is in contact with the ground and forms the lower surface of the air purifier 10, and a base protrusion 181b that protrudes upward from the underplate 181a.
  • the base protrusion 181b may be provided on both sides of the base plate 181, and the underplate 181a and the base grill 182 are spaced apart from each other by the base protrusion 181b, so that the base plate 181 and the base grill are separated from each other.
  • a base suction portion 114 may be formed between (182).
  • a suction portion 182b consisting of a plurality of suction holes may be formed on the edge of the base grill 182, and a ring-shaped base grill body 182a may extend inward from the edge.
  • a base grill groove portion 182d may be formed in a portion of the base grill body 182a, and the base grill groove portion 182d may be understood as a space in the edge in which the suction portion 182b is not formed.
  • a plurality of filter guide parts 182c that guide the upward or downward movement of the filter 120 may protrude from the upper surface of the base grill body 182a and are spaced apart in the circumferential direction.
  • the filter 120 may be cylindrical, surrounded by a filter body 121 and with a filter hole 122 formed therein, and a filter holding portion 121a may protrude from the lower side of the filter body 121.
  • the air that flows into the inside of the filter 120 through the outer peripheral surface of the filter body 121 passes through the filter body 121, filters out foreign substances, and then flows upward through the filter hole 122.
  • the user can separate the filter 120 from the filter frame 190 by holding the filter holding portion 121a.
  • the filter body 121 may be cylindrical in which a pre-filter, a HEPA filter, and a deodorizing filter are stacked in layers in the radial direction.
  • the lever device 183 which is provided on the upper side of the base grill 182 and is arranged to be operated by the user, may be installed to be rotatable in the circumferential direction.
  • the lever device 183 may be annular and may include a lever body 183a that forms the overall outline.
  • a plurality of cut portions (183b) may be formed in the lever body (183a) at positions corresponding to the filter guide portion (182c), and the cut portion (183b) may be understood as a through hole formed in the lever body (183a). You can.
  • the filter guide portion 182c may be inserted into the cutout portion 183b and protrude upward from the lever body 183a.
  • a handle 183c may be provided on the outer peripheral surface of the lever body 183a, and the handle 183c may be provided with a movable space by the base grill groove portion 182d.
  • a support device 184 supporting the filter 120 may be disposed on the upper side of the lever device 183, and a support protrusion (not shown) in contact with the filter guide portion 182c is provided on the lower side of the support device 184. can be formed.
  • the support device 184 may include a handle coupling portion 184a coupled to the handle 183c, and the user can rotate the lever device 183 and the support device 184 by holding the coupled handle 183c. You can.
  • the filter guide portion 182c and the support protrusion may have inclined surfaces inclined in opposite directions, and both inclined surfaces may be in contact with each other.
  • the filter guide portion 182c and the support protrusion move along both inclined surfaces and are supported.
  • the device 184 can be moved up and down, and as a result, the filter 120 located on the upper side of the support device 184 can be moved up and down, allowing the filter 120 to be placed in a detachable state from the filter frame 190. You can.
  • a filter frame 190 forming a mounting space for the filter 120 is disposed on the upper side of the support device 184, and the filter frame 190 includes a lower frame 191 forming the lower boundary of the filter frame 190, and The upper border may include an upper frame 192.
  • a frame depression 191a that is depressed downward may be formed in the lower frame 191, and the frame depression 191a is formed at a position corresponding to the base grill groove 182d so that the handle 144 rotates.
  • the filter support portion 193 may be arranged to extend from the lower frame 191 to the upper frame 192, and may be disposed in plural numbers spaced apart in the circumferential direction along the edges of the frames 191 and 192. You can.
  • a filter support cover 193a may be coupled to the outside of the filter support 193, and a mounting space for the filter 120 may be defined by the frames 191 and 192 and the filter support 193.
  • the filter 120 can be installed in the mounting space, and an air quality detector 199 that measures the amount of foreign substances contained in the air flowing in through the air inlet 112 can be placed on the filter frame 190.
  • a sensor assembly 20 is disposed on the downstream side of the filter 120 to measure the pressure of air flowing downstream of the filter 120.
  • the sensor assembly 20 may be electrically connected to the display 390, determine the replacement cycle of the filter 120 based on the measured pressure value, and transmit the determined information to the display 390.
  • the display 390 may display information received from the sensor assembly 20 to be exposed to the outside.
  • a fan housing 130 forming a space for accommodating the blowing fan 132 may be disposed on the outlet side of the filter 120.
  • the fan housing 130 may be supported by the filter frame 190, and an ionizer 138 may be disposed on the fan housing 130 to remove/sterilize pollutants or odor particles in the air.
  • the ionizer 138 may be supported by the filter frame 190 by combining the fan housing 130 and the filter frame 190.
  • the blowing fan 132 can be accommodated in the fan housing 130, is connected to the fan motor 134 and the fan motor rotation shaft 134a, and is fastened to the fan motor 134 by the fan motor coupling portion 134b. You can. Additionally, the fan motor coupling portion 134b may perform the function of fastening the fan motor 134 to the blower guider 140.
  • the blower guider 140 may be disposed on the upper side of the blower fan 132 and may include a cylindrical blower body 142 and a bowl-shaped motor cover 144 located inside the blower body 142. .
  • An air flow passage 140a may be formed between the blower body 142 and the motor cover 144, and the bowl-shaped motor cover 144 that accommodates the fan motor 134 is an air flow passage ( The inner border of 140a) can be formed.
  • the fan motor rotation shaft 134a may extend downward from the fan motor 134, penetrate the bottom of the motor cover 144, and then be coupled to the blowing fan 132.
  • a fastening rib 148 may be formed on the upper surface of the motor cover 144 to protrude upward and engage with a fastening guide (not shown) formed on the lower part of the discharge guider 150.
  • a plurality of guide vanes 146 extending from the blower body 142 to the outer peripheral surface of the motor cover 144 may be formed spaced apart in the circumferential direction, and a blower guider ( The air passing through 140) can be guided in the flow direction by the guide vane 146.
  • Figure 4 is a perspective view showing the coupling relationship between the filter frame 190 and the sensor assembly 20, and Figure 5 shows the structure of Figure 4 as seen from the top.
  • the sensor assembly 20 can be understood as a concept including a pressure sensor 30, a first tube 40, a second tube 50, and an adapter 60, which will be described later.
  • the sensor assembly 20 may be a structure in which the above-described components 30, 40, 50, and 60 are formed as one piece, or may be an assembly in which each of the above-described components 30, 40, 50, and 60 are assembled.
  • the filter frame 190 can provide a space (S) into which the filter 120 can be attached and detached, and the form shown in FIG. 4 shows a state in which the filter 120 is dismounted and the space (S) is empty.
  • the sensor assembly 20 may be placed on the upper side of the filter frame 190.
  • the filter frame 190 includes a lower frame 191 constituting the lower part of the filter frame 190, an upper frame 192 spaced apart from the upper side of the lower frame 191, and a lower frame 191 that extends in the vertical direction. ) and a plurality of filter supports 193 connecting the upper frame 192.
  • the overall outer shape of the lower frame 191 may be annular and may form the lower surface of the filter frame 190.
  • a support device 184 (see FIG. 3) may be disposed inside the lower frame 191, and the support device 184 has an outer peripheral surface in contact with the inner peripheral surface of the lower frame 191 and is supported by the lower frame 191. It can be.
  • the support device 184 may be a support plate that supports the lower surface of the filter 120 when the filter 120 is detached from the space S.
  • the filter support portion 193 may be formed to extend upward from the lower frame 191 and may be combined with the filter support portion cover 193a (see FIG. 3) to have a square pillar shape.
  • a plurality of filter supports 193 may be arranged, or four may be arranged, spaced apart in the circumferential direction.
  • the filter support portion 193 can be arranged to avoid the front where the filter 120 is inserted and to focus on the rear. Accordingly, the filter 120 may be introduced into the filter frame 190 from the front to the rear, and its movement to the rear may be restricted by the filter support portion 193 disposed at the rear.
  • the upper frame 192 is connected to the upper part of the filter support part 193 and may be spaced upward from the lower frame 191.
  • the overall outer shape of the upper frame 192 may be cylindrical, and may form the outer peripheral wall of the upper part of the filter frame 190.
  • the upper frame 192 extends in the circumferential direction between a plurality of filter supports 193 spaced apart in the circumferential direction and may be connected to each of the adjacent filter supports 193. Accordingly, the upper frame 192 can be understood as a structure extending in the circumferential direction to connect the plurality of filter supports 193 at the top of the filter frame 190.
  • the upper frame 192 may protrude in a radial outward direction from the front of the filter frame 190 to form a detector cover 199a surrounding the air quality detector 199.
  • the detector cover 199a can be understood as a part where the upper frame 192 extending in the circumferential direction has a shape that protrudes outward of the radius, and the air quality detector 199 can be placed inside the detector cover 199a. .
  • the upper frame 192 may protrude in a radial outward direction from the rear of the filter frame 190 to form a substrate cover 198a surrounding the wireless communication substrate 198.
  • the substrate cover 198a can be understood as a portion in which the upper frame 192 extending in the circumferential direction has a shape that protrudes outward radially, and the wireless communication substrate 198 can be placed inside the substrate cover 198a. there is.
  • the air quality detector 199 measures the amount of foreign substances contained in the air flowing in through the air inlet 112, and can detect dust concentration, CO2 concentration, gas concentration, etc. of the incoming air. Accordingly, the air quality detector 199 can be understood as a single module in which a dust sensor, a CO2 sensor, a gas sensor, etc. are assembled.
  • the wireless communication board 198 may be a PCB board that detects radio signals transmitted from the outside and controls the operation of the discharge guider 150.
  • a wireless communication module that communicates with a remote control placed outside the case 110 through a wireless communication method such as WIFI may be mounted on the wireless communication board 198.
  • the filter frame 190 may include a support plate 194 extending radially inward from the lower end of the upper frame 192, and a partition wall 195 extending upward from the inner end of the support plate 194.
  • the support plate 194 may have an overall outer shape extending in the circumferential direction, and may be connected to the lower end of the upper frame 192 on the outside of the radius and with the lower end of the partition wall 195 on the inside of the radius.
  • the sensor assembly 20, the wireless communication board 198, and the air quality detector 199 may be in contact with the upper surface of the support plate 194 and supported by the support plate 194.
  • the partition wall 195 may have an overall outer shape of a cylinder, and may be spaced apart from the upper frame 192 in a radial inward direction by a support plate 194. Accordingly, the sensor assembly 20, the wireless communication board 198, and the air quality detector 199 can be disposed between the upper frame 192 and the partition wall 195. In the case of the sensor assembly 20, based on the partition wall 195, the pressure sensor 30 may be placed outside the partition wall 195, and the first tube 40 and the inside of the partition wall 195. A second tube 50 may be disposed. The sensor assembly 20 may be disposed to penetrate the partition wall 195, and the first tube 40 and the second tube 50 may penetrate the partition wall 195.
  • a filter outlet 190a may be formed, which is a flow passage through which air passing through the filter 120 flows upward.
  • the filter outlet 190a can be understood as a cylindrical space formed inside the partition wall 195.
  • a mesh-shaped filter frame grill 196 may be formed in the filter discharge port 190a.
  • the overall appearance of the filter frame grill 196 may be a spider web model and may include a plurality of first grill frames 196a extending in the radial direction and a plurality of second grill frames 196b extending in the circumferential direction. there is.
  • the plurality of first grill frames 196a may extend in a radial outer direction from the center P of the filter outlet 190a to the partition wall 195 and may be formed to be spaced apart from each other in the circumferential direction.
  • the plurality of second grill frames 196b may be spaced apart from each other in the radial direction and may be in a concentric relationship with the center P of the filter outlet 190a.
  • the filter discharge port 190a can also be understood as a set of cells in a grid model formed by the filter frame grill 196, and the air passing through the filter 120 is connected to the first grill frame 196a and the second grill frame. It can flow upward through the filter outlet (190a) formed by crossing (196b).
  • the filter frame 190 When the filter frame 190 is viewed from above as shown in FIG. 5, the filter frame 190 may have a circular shape based on the center P of the filter outlet 190a.
  • the plurality of first grill frames 196a may all extend in the radial direction to pass through the center P, and may include a reference frame 196a1 extending in a direction parallel to the front and rear, and a direction perpendicular to the reference frame 196a1. It may include an orthogonal frame 196a2 extended to .
  • the extension direction of the reference frame 196a1 can be represented by a virtual X1-X2 diagram, and as the reference frame 196a1 extends in a direction parallel to the front and rear, X1 may correspond to the front and there is.
  • the extension direction of the orthogonal frame 196a2 can be represented by a virtual Y1-Y2 diagram, and the sensor assembly 20 can be placed adjacent to the Y1 direction.
  • the wireless communication board 198 may be placed at a position that intersects the X1-X2 line diagram, and may be located at the rear (X2) of the X1-X2 line diagram.
  • the air quality detector 199 may be placed at a location that intersects the X1-X2 line diagram, and may be located in front (X1) on the X1-X2 line diagram. Accordingly, the wireless communication board 198 and the air quality detector 199 may be placed in a straight line and may be placed in a position symmetrical front and rear with respect to the center P.
  • the sensor assembly 20 may be placed in a position close to the rear (X2) based on the Y1-Y2 diagram. Additionally, the sensor assembly 20 may be placed at a position where the Y1-Y2 line intersects the Z line diagram with a predetermined included angle ( ⁇ ).
  • the Z line diagram may refer to an imaginary line segment formed at a position spaced apart by a central angle ( ⁇ ) toward the rear (X2) from the Y1-Y2 line diagram, and may form an intersection with the Y1-Y2 line diagram at the center (P). .
  • the above-described Z line diagram can be called an “azimuth diagram” in that it indicates the arrangement position of the sensor assembly 20, and the Y1-Y2 diagram sets the reference position where the sensor assembly 20 is arranged. It may be named “baseline diagram”.
  • the sensor assembly 20 may be placed at a position that intersects the azimuth chart Z extending in a direction spaced apart from the reference lines Y1-Y2 by the central angle ⁇ .
  • the azimuth (Z) may pass between the first tube 40 and the second tube 50 and may pass through the center of the pressure sensor 30.
  • the sensor assembly 20 can be placed closer to the wireless communication board 198 than the air quality detector 199, and to the rear ( It can also be said that it can be placed at X2). Due to the arrangement position of the sensor assembly 20 described above, the sensor assembly 20 can be placed in a position spaced circumferentially from the air quality detector 199 and maintain a sufficient separation distance from the air quality detector 199. .
  • the air quality detector 199 may include a dust sensor and a CO2 sensor, and both the dust sensor and the CO2 sensor have heaters inside to heat the air introduced into the sensor. Dust sensors and CO2 sensors measure the amount of foreign substances contained in the air by radiating light of a specific wavelength to the rising airflow formed by air heated by a heater.
  • the pressure sensor 30 measures the air pressure inside the first tube 40 and the second tube 50, respectively. According to the above, when measuring air pressure, an increase in ambient temperature causes a change in pressure, so when the air quality detector 199 is placed near the pressure sensor 30, the pressure sensor 30 Measured values are less reliable due to the heater in the air quality detector 199. From this perspective, the sensor assembly 20 according to an embodiment of the present invention can increase the reliability of the value measured by the pressure sensor 30 by securing a sufficient separation distance from the air quality detector 199.
  • the pressure sensor 30 may be disposed between the upper frame 192 and the partition wall 195 and may be seated on the support plate 194.
  • the filter discharge port 190a may form a discharge passage through which air passing through the filter 120 flows toward the air discharge port 152 on the inside of the partition wall 195, and the pressure sensor 30 may be connected to the partition wall 195. ), the pressure sensor 30 may not be exposed to the discharge passage.
  • the first tube 40 and the second tube 50 may be disposed between the partition wall 195 and the center P, and may be connected to the pressure sensor 30.
  • the first tube 40 and the second tube 50 may extend in a direction perpendicular to the direction of extension of the partition wall 195 and may extend toward the center P.
  • the direction in which the first tube 40 and the second tube 50 extend may be parallel to the azimuth (Z) and may be parallel to the extension direction of one of the plurality of first grill frames 196a.
  • the first tube 40 and the second tube 50 may be disposed on the upper side of the filter frame grill 196, and thus serve as a discharge flow path through which air passing through the filter 120 flows toward the air discharge port 152. may be exposed to
  • the first tube 40 may have a first hole (not shown) opened toward the filter 102.
  • the first hole may be arranged to face the filter outlet (190a).
  • a second hole (not shown) opening in a direction opposite to the filter 120 may be formed in the second tube 50 .
  • the second hole may be arranged to face the fan housing inlet (130a).
  • the fan housing inlet 130a communicates vertically with the filter discharge port 190a and can be understood as a "discharge passage" that guides the air passing through the filter 120 to the air discharge port 152 via the blowing fan 132. there is.
  • FIG. 6 is a block diagram of an air purifier according to an embodiment of the present invention.
  • the air purifier includes a control unit 640 and a fan driving unit 680 that drives fans 132, 232, and 330 under the control of the control unit 640. It can be included.
  • the internal block of the air purifier 10 is respectively disposed inside the cases 110 and 210 in which the air inlets 112 and 212 and the air discharge ports 152 and 252 are formed, or is installed in one of the cases 110 and 210. 210) can be placed inside.
  • blowing fans 132 and 232 are installed to control the flow of sucked indoor air that is purified by passing through the filter 120 and then discharged into the indoor space.
  • the fan motors 134 and 234 rotate the fans 132 and 232 according to the control signal received from the fan driver 680.
  • the rotation of the fans 132 and 232 is controlled by the fan driver 680, and the operation of the fan driver 680 is controlled by the controller 640.
  • the filters 120 and 220 filter out foreign substances contained in the air flowing in through the air inlets 112 and 212.
  • the filters 120 and 220 may include a pre-filter that filters out foreign substances in the air, a HEPA filter that collects contaminants in the air, and a deodorizing filter that deodorizes bad odors in the air.
  • the pre-filter forms a grill that primarily filters foreign substances in the inhaled air.
  • the HEPA filter collects contaminants in the inhaled air, and the deodorizing filter can deodorize the odor in the inhaled air.
  • the air purifier includes a sensing unit 650 that includes one or more sensors to measure air pollution or sense the operating state of the air purifier.
  • the sensing unit 650 includes the pressure sensor 30 described above.
  • the blowing fans 132 and 232 are disposed on the discharge passage.
  • the pressure sensor 30 is disposed in the discharge passage on the downstream side of the filter 120 to measure air pressure.
  • the air purifier may include a memory 630, a communication unit 670, etc.
  • the communication unit 670 may include a wireless communication module mounted on the wireless communication board 198.
  • the memory 630 may store data for controlling the operation of the air purifier 10, data sensed or measured through the sensing unit 650 during operation, and data received through the communication unit 670.
  • the air purifier 10 may include a buffer for temporarily storing data, and the buffer may be included in the control unit 640 or memory 630.
  • the control unit 640 can update the memory 645 by processing various data received through the communication unit 670. For example, if the data input through the communication unit 670 is update data for a driving program previously stored in the memory 630, it is used to update the memory 630, and the input data is a new driving program. In this case, it can be additionally stored in the memory 630.
  • the input unit 610 can receive various user commands related to the operation of the air purifier 10 and transmit control signals corresponding to the input commands to the control unit 640.
  • the input unit 610 may include a touch pad, physical buttons, etc.
  • the output unit 620 may be equipped with a display device such as a display 390 or a light emitting diode (LED) (not shown).
  • the output unit 620 may display information such as the operating state of the air purifier 10, the operating state related to error occurrence, etc., or the indoor temperature and target temperature.
  • the output unit 620 may be equipped with an audio device such as a speaker (not shown) and a buzzer (not shown).
  • the output unit 620 can output a sound effect for the operating state of the air purifier 10 and output a predetermined warning sound when an error occurs.
  • the output unit 620 can output the current operation mode of the air purifier 10, a filter replacement message, a filter blockage confirmation alarm (package not removed message), and a filter installation confirmation alarm (filter uninstalled message).
  • the control unit 640 may be connected to each component provided in the air purifier 10. For example, the control unit 640 may transmit and/or receive signals between each component provided in the air purifier 10 and control the overall operation of each component.
  • the control unit 640 may include at least one processor, and may control the overall operation of the air purifier using the processor included therein.
  • the processor may be a general processor such as a central processing unit (CPU).
  • the processor may be a dedicated device such as an ASIC or another hardware-based processor.
  • control unit 640 can control the overall operation of the air purifier 10 and can control a series of air cleaning processes, such as intake of external air and discharge of purified air.
  • the control unit 640 can perform an air cleaning process according to a preset algorithm, and the fan driver 680 can drive the fans 132 and 232 according to the control of the control unit 640. there is.
  • the fan motors 134 and 234 are operated by a control signal sent from the fan driver 680.
  • data sensed by the sensing unit 650 is transmitted to the control unit 640.
  • air pressure data measured by the pressure sensor 30 is transmitted to the control unit 640.
  • the control unit 640 calculates the air volume based on the air pressure measured by the pressure sensor 30. In addition, the control unit 640 determines whether the packaging of the filters 120 and 220 has been removed and whether the filters 120 and 220 have been installed based on the difference between the calculated air volume and the calculated air volume.
  • the pressure sensor 30 can measure the air pressure inside the two tubes 40 and 50 disposed on the downstream side of the filter 120, and transmit the measured data to the control unit 640.
  • the control unit 640 can calculate the differential pressure from the difference in air pressure inside the two tubes 40 and 50.
  • the control unit 640 can detect an abnormal state of the filter 120 of the air purifier 10 using the differential pressure sensor 30. When it is determined that the filter packaging has not been removed or the filter has not been installed, the output unit 620 may output an alarm for the determined abnormality information.
  • inspection notification when purchasing the air purifier 10, replacing the filter 120, or using the filter packaging material (vinyl) without removing it, inspection notification can be performed by sensing. Additionally, according to one embodiment of the present invention, when the filter 120 is removed for maintenance such as cleaning and then used again without the filter 120 installed, a filter status inspection notification may be notified.
  • the control unit 640 may calculate the differential pressure based on measurement data received from the pressure sensor 30. Using information about the voltage of air (Ptot) measured inside the first tube 40 and information about the static pressure of air (Pst) measured in the second tube 50, the first tube 40 and The differential pressure (DP) between the second tubes 50 can be calculated.
  • the differential pressure (DP) calculated here may be the dynamic pressure (Pdy) calculated by subtracting the static pressure (Pst) from the voltage (Ptot).
  • the control unit 640 may calculate a first average value (DP_average1) by averaging N pieces of differential pressure data (DP) and calculate the air volume based on the first average value (DP_average1).
  • the square of the air volume is proportional to the differential pressure, and the proportionality constant determined by the cross-sectional area of the air flow passage passing through the filters 120 and 220 is a value known at the time of product design, so if the differential pressure is known, the air volume can be calculated.
  • control unit 640 calculates a second average value (DP_average2) by averaging N/2 pieces of differential pressure data in the first half among the N pieces of differential pressure data, and calculates the second average value (DP_average2) and N/2 pieces of differential pressure data in the second half.
  • the standard deviation (Filter_Current_std) of the air volume can be calculated.
  • Filter_Current_std sqrt( ⁇ (DP_current-DP_average2) ⁇ 2 /0.5N)
  • the user can select one of a plurality of air volume modes by manipulating the input unit 610 and the terminal, and the control unit 640 operates the blowing fans 132 and 232 to rotate at a rotation speed (RPM) corresponding to the selected air volume mode.
  • RPM rotation speed
  • the plurality of wind volume modes may include a turbo wind mode with a maximum discharge air volume, a strong wind mode with a wind volume smaller than the turbo wind mode, a medium wind mode with a wind volume smaller than the strong wind mode, and a weak wind mode with a minimum wind volume.
  • the control unit 640 does not use data measured for a predetermined time after a change in the rotational speed of the blowing fans 132 and 232 to calculate the air volume, but calculates the air volume using air pressure data measured after the predetermined time. It can be calculated.
  • the control unit 640 may turn off the operation when it is determined that the packaging of the filter 120 is not removed or the filter is not installed. Afterwards, when there is a command to turn on the operation, it is possible to determine whether the packaging of the filters 120 and 220 has been removed and whether the filters 120 and 220 have been installed.
  • the control unit 640 may determine that the packaging of the filters 120 and 220 has not been removed if the calculated air volume is less than the first standard value and the deviation of the calculated air volume is greater than or equal to the variation standard value.
  • the control unit 640 may determine that the filter 120 is not installed if the calculated air volume is greater than the second reference value and the deviation of the calculated air volume is greater than or equal to the variation standard value.
  • the second reference value may be set larger than the first reference value.
  • the blowing fans 132 and 232 rotate at a rotational speed (RPM) corresponding to the current air volume mode set among the plurality of air volume modes, and the first reference value and the second reference value are the air volume of each of the plurality of air volume modes. It can be set in response to .
  • RPM rotational speed
  • the control unit 640 calculates an air volume ratio between the air volume corresponding to the current air volume mode and the calculated air volume, and the calculated air volume ratio is smaller than the first air volume ratio reference value, and the calculated air volume ratio is smaller than the first air volume ratio reference value. If the deviation of the generated air volume is greater than the variation standard value, it can be determined that the packaging of the filter has not been removed. Additionally, the control unit 640 may determine that the filter is not installed if the calculated air volume ratio is greater than the second air volume ratio standard value and the deviation of the calculated air volume is greater than or equal to the variation standard value.
  • the second air volume ratio standard value may be set to be greater than the second air volume ratio standard value. Additionally, the air volume corresponding to the current air volume mode may correspond to the air volume measured when an unused filter is first installed in each air volume mode.
  • FIG. 7 is a flowchart of an air purifier operating method according to an embodiment of the present invention.
  • the sensing unit 650 senses the operating state of the air purifier 10 while the air purifier 10 is operating and transmits it to the control unit 640 (S710).
  • the pressure sensor 30 measures air pressure, and the pressure sensor 30 or the control unit 640 can calculate the differential pressure (DP) based on the measurement data of the pressure sensor 30. there is.
  • DP differential pressure
  • control unit 640 controls the air purifier 10 to operate in the air volume mode set by the user.
  • air pressure data is acquired from the pressure sensor 30, and the control unit 640 calculates the differential pressure (DP) and calculates the current air volume based on the calculated differential pressure (DP). can do.
  • the air volume can be calculated based on the first average value (DP_average1) obtained by averaging N pieces of differential pressure data.
  • control unit 640 compares the calculated air volume with a first reference value set corresponding to the operating air volume mode (S720). Additionally, the control unit 640 calculates the standard deviation (Filter_Current_std) of the air volume and compares it with the variation reference value (S730).
  • the control unit 640 packs the filters 120 and 220. It can be determined as not removed. Additionally, the control unit 640 may control the output unit 620 to output a message notifying that the packaging has not been removed and to check for filter blockage (S740).
  • the control unit 640 determines whether the filters 120 and 220 are not installed. It can be determined by: In addition, the control unit 640 may control the output unit 620 to output a message notifying that the filters 120 and 220 are not installed and to confirm whether the filters 120 and 220 are installed (S770). ).
  • the present invention not only can it be possible to simply and accurately determine whether there is a problem with the filters 120 and 220, but it is also possible to determine the cause of the problem, such as not removing or not installing the packaging of the filter 120.
  • Figure 8 is a flowchart of an air purifier operation method according to an embodiment of the present invention, and shows an example of a filter abnormality detection algorithm.
  • the rotational speed (RPM) of the blowing fans (132, 232) is maintained for a predetermined time (X seconds) as the air purifier (10) operates in a predetermined air volume mode (S810)
  • the pressure sensor (30) The pressure can be measured (S820).
  • the air volume judgment logic can be applied after X seconds by considering the stabilization period of the fan RPM.
  • the control unit 640 calculates the air volume based on the first average value (DP_average1) obtained by averaging the N differential pressure data (DP). And, the air volume ratio ((calculated current air volume value)/(air volume reference value set based on the air volume corresponding to the current air volume mode)) of the air volume corresponding to the current air volume mode and the calculated air volume can be calculated (S840). .
  • the air volume reference value Flow Rate (CMM) a*(RPM)- b
  • air volume ratio currently measured air volume/air volume standard value
  • control unit 640 can also calculate the air volume deviation (Filter_Current_std).
  • the control unit 640 operates the filters 120 and 220 if the calculated air volume ratio is less than the first air volume ratio standard value (S1) (S850) and the deviation (Filter_Current_std) of the calculated air volume is greater than or equal to the variation standard value (S855). It can be determined that the packaging has not been removed (S860).
  • the first air volume ratio reference value (S1) may be a calculated air volume coefficient without packaging paper being removed.
  • the control unit 640 may control the output unit 620 to output a message notifying that the packaging has not been removed and to check for filter blockage (S860).
  • the filter is not installed. It can be determined (S880).
  • the second air volume ratio reference value (S2) may be a calculated air volume coefficient without a filter installed.
  • control unit 640 may control the output unit 620 to output a message notifying that the filters 120 and 220 are not installed and to confirm whether the filters 120 and 220 are installed (S880). ).
  • Detection of whether the filter packaging has been removed can utilize the characteristic of measuring lower than the initial air volume if the packaging of the filters 120 and 220 is not removed.
  • N differential pressure data are measured, and the air volume ratio converted to differential pressure measured with N/2 data satisfies a * RPM_factor (correction value for each RPM) or less compared to the initial level, and the standard deviation (Filter_Current_std) is greater than or equal to the standard value (Filter_RPM_std). If is satisfied, it can be judged as “filter packaging not removed.”
  • Filter_RPM_std (standard deviation standard) c(Option)* RPM - d(Option)
  • the option values (a, b, c, d) are factors determined in relation to the structure of the product, and the manufacturer can determine the option value in advance for each product being released.
  • 9 to 13 are diagrams referenced in the description of the operation of the air purifier according to the embodiment.
  • Figure 9 is a graph showing the results of measuring product air volume by fan RPM of the initial (new) filter.
  • Figures 10a to 10d show borrowing data obtained with the filter vinyl removed/not removed for each air volume mode.
  • Figure 10a shows the experimental results of a weak wind
  • Figure 10b shows a medium wind
  • Figure 10c shows a strong wind
  • Figure 10d shows the experimental results of a turbo wind volume mode.
  • FIGS. 10A to 10D it can be seen that when the filter vinyl is not removed, a change in wind speed occurs along with a decrease in wind volume. In addition, it can be seen that when the filter vinyl is not removed, a significant change in air volume occurs compared to when a normal filter is installed.
  • Figure 11 shows the air volume when the filter is not installed and the air volume when the filter is installed. Referring to FIG. 11, when the filter is not installed, an increase in the air volume (pressure) is confirmed, as opposed to when the vinyl is not removed, and it can also be confirmed that a significant change (deviation) in the air volume (pressure) occurs.
  • Figure 12 shows the normal filter air volume measurement range and abnormal range for each fan RPM, and it can be confirmed that the air volume is divided into when the filter is clogged and when the filter is not installed.
  • Figure 13 shows the standard deviation distribution of filter differential pressure for each lung amount.
  • Non-installed state detection conditions can be calculated through the standard deviation of differential pressure measurement data (pressure-air volume). STD (abnormal judgment)> c*(RPM)-d
  • abnormal conditions can be determined through standard deviation in the case of abnormal installation (plastic not removed, filter not installed) for each air volume.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

Un purificateur d'air, selon un mode de réalisation de la présente invention, comprend : un boîtier dans lequel une entrée d'air et une sortie d'air sont formées ; un filtre qui élimine par filtrage des substances étrangères contenues dans l'air introduit par l'entrée d'air ; un passage de refoulement qui raccorde l'entrée d'air à la sortie d'air dans le boîtier ; un ventilateur de soufflage qui est disposé sur le passage de refoulement et met en circulation de l'air de l'entrée d'air à la sortie d'air ; un capteur de pression qui est disposé sur le passage de refoulement pour mesurer la pression d'air ; et une unité de commande qui calcule un volume d'air sur la base de la pression d'air mesurée par le capteur de pression, et détermine si l'emballage du filtre est retiré et si le filtre est installé, sur la base du volume d'air calculé et d'un écart du volume d'air calculé.
PCT/KR2023/015019 2022-11-16 2023-09-27 Purificateur d'air WO2024106742A1 (fr)

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KR1020220153450A KR20240071680A (ko) 2022-11-16 2022-11-16 공기청정기
KR10-2022-0153450 2022-11-16

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WO2024106742A1 true WO2024106742A1 (fr) 2024-05-23

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US20200256578A1 (en) * 2017-08-29 2020-08-13 3M Innovative Properties Company Air filter condition sensing
US20190197794A1 (en) * 2017-12-21 2019-06-27 Caterpillar Inc. System And Method Of Determining Remaining Useful Life Of An Air Filter
KR20210120344A (ko) * 2020-03-26 2021-10-07 윤홍식 공기청정기의 필터 교환주기 측정방법
KR20220040192A (ko) * 2020-09-23 2022-03-30 엘지전자 주식회사 공기청정기

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