WO2023274802A1 - Purificateur d'air - Google Patents

Purificateur d'air Download PDF

Info

Publication number
WO2023274802A1
WO2023274802A1 PCT/EP2022/066980 EP2022066980W WO2023274802A1 WO 2023274802 A1 WO2023274802 A1 WO 2023274802A1 EP 2022066980 W EP2022066980 W EP 2022066980W WO 2023274802 A1 WO2023274802 A1 WO 2023274802A1
Authority
WO
WIPO (PCT)
Prior art keywords
filter
air
hins
light source
light
Prior art date
Legal status (The legal status 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 status listed.)
Ceased
Application number
PCT/EP2022/066980
Other languages
English (en)
Other versions
WO2023274802A8 (fr
Inventor
Alagirisamy NETHAJI
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Blueair AB
Original Assignee
Blueair AB
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 Blueair AB filed Critical Blueair AB
Publication of WO2023274802A1 publication Critical patent/WO2023274802A1/fr
Publication of WO2023274802A8 publication Critical patent/WO2023274802A8/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

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
    • F24F8/00—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying
    • F24F8/20—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation
    • 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
    • F24F8/30—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by ionisation
    • 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
    • F24F8/90—Cleaning of purification apparatus

Definitions

  • the present invention relates to an air purifier with improved performance.
  • Air purifiers work by filtering ambient air through a filter. Accordingly, anything in the air is in theory capturable by the filter. While there are different types of filtration means, from particulate filter to gas filter, it is a necessary consequence of the functioning of an air purifier that they also capture microbes caught in the air flow.
  • US 2019/167833 discloses an air purifier, comprising: a upper cover, having at least one grid column on front terminal of the upper cover; a bottom cover, having at least one grid column on front terminal of the bottom cover; and two groups of ultraviolet light emitting diodes (LEDs), respectively having a heat sink and a ultraviolet light emitting diode (LED), wherein the ultraviolet LED is mounted on the heat sink, and a wavelength range of the ultraviolet LED is between 100 nm and 480 nm; wherein the grid column on front terminal of the upper cover is combined with the grid column on front terminal of the bottom cover to form a column hole through which an air flows out.
  • LEDs ultraviolet light emitting diodes
  • KR 102204085 (Cha Byeong Ho) discloses an air purifying apparatus with a sterilizing function, comprising: a main body (110) having one side surface on which an inlet (111) is formed, the other side surface on which an outlet (112) is formed, and the inside in which a purification space (113) communicating with the inlet (111) and the outlet (112) is formed and an installation hole (114) communicating with the purification space (113) is arranged; a suction fan (120) introducing external air through the inlet (111) while being driven to rotate in the main body (110); a filter unit (130) arranged in the main body (110) to filter foreign materials of the introduced air; and a sterilizing ray module (140) mounted in the installation hole (114) and having a UV ray panel (141) arranged at the position directed toward the purification space (113) to emit UV sterilization rays toward the air passing through the purification space (113).
  • the sterilizing ray module (140) is detachably mounted in the installation hole (114) while being formed with size to be capable of being gripped by the hand, and has a battery (142) embedded to supply a driving power source to the UV ray panel (141) so as to emit the UV sterilization rays toward a polluted object (10) in a state of being separated from the installation hole (114).
  • a purification device comprises a photocatalyst filter; and a light source module which emits light to the photocatalyst filter to activate a photocatalytic reaction.
  • the wavelength of light whose relative intensity is the strongest among wavelengths of emitting lights is 380 to 420 nm.
  • the photocatalyst filter comprises tungsten oxide.
  • the light source module can be spaced a predetermined distance apart from the photocatalyst filter. According to the present invention, heat dissipation properties can be improved by natural convection.
  • a lighting system includes can include one or more high intensity narrow spectrum light sources configured to emit high intensity narrow spectrum light.
  • the lighting system can further include a power circuit configured to provide power to the one or more high intensity narrow spectrum light sources and a pulsing circuit configured to control delivery of power to the one or more high intensity narrow spectrum light sources so as to pulse the emission of high intensity narrow spectrum light from the one or more high intensity narrow spectrum light sources.
  • an air purifier comprising n air flow generator, a motor for said fan, a removable filter, and a high intensity narrow spectrum (HINS) light source.
  • HINS high intensity narrow spectrum
  • the HINS light used in the invention is preferably provided by a light emitting diode (LED) system.
  • LED light emitting diode
  • HINS light is meant light having a peak wavelength in the range of about 392 nm to about 398 nm, preferably from 393 nm to about 397 nm, and most preferably at 395 nm.
  • An example of a suitable light source is a 395 nm light emitting diode (LED) array (ENFIS PhotonStar Innovate UNO 24; PhotonStar Technologies, UK) powered by a 40 V LED Driver.
  • the array has a peak wavelength around 395 nm and a bandwidth of approximately 19 nm but will, for convenience, be referred throughout as 395 nm light.
  • a HI NS light source at from 392 to 398 nm is capable of playing a key role in the purification of air. Not only is this narrow band of light is capable of reducing filter contamination but the HINS light source has no impact on the structural integrity of the filters. Accordingly, the HINS light source can be employed close to the removable filters in air purifiers so as to efficiently decontaminate filters without any negative impact on the filter’s structural integrity and so filtration performance. In contrast it is well known that other light sources such as UV damage the filters when they are employed to decontaminate them.
  • said H I NS light source emits light with an average wavelength of from 392 to 398 nm or more preferably from 393 to 397 nm.
  • the most preferred peak wavelength is 395 nm.
  • the HINS light source may be employed singularly or in a group of light sources.
  • Many light sources may be sued to emit light to bathe as much of the interior surfaces of the purifier, in particular the filter, in light of the appropriate wavelength as possible.
  • the HINS sources are selected and disposed such that the light intensity at the removable filter is from 800 to 5000 lux, preferably from 1000 to 4000 lux.
  • the HINS light source is disposed after the fan in an air flow direction.
  • the HINS light source is disposed between the fan and the filter in an air flow direction.
  • the light source in such an embodiment will be directed to emit light towards the removable filter during use so as to bathe the filter in light having the desired wavelength.
  • the HINS light source is disposed after the filter in an air flow direction so long as the light sources are directed towards the filter.
  • the light source would also be decontaminating the air pulled through the filter should any micro-organisms remain in the air flow unfiltered by the filter.
  • the HI NS light source is disposed from 2 to 50 cm from the filter.
  • the removable filter media may be a particulate filter or gas filter while it is also possible that both a particulate and gas filter may be simultaneously employed.
  • the air flow speed measured at the removable filter is known in the art as the media velocity.
  • Media velocity is the velocity at which the air travels through the filter. Media velocity has to be controlled perfectly to ensure that the maximum amount of particles are trapped. Too fast and many of the pollutants fly straight through unfiltered. Too slow and the purifier is not reaching the farthest comers of your room quickly enough to be effective.
  • the air purifier comprises an ioniser.
  • the ioniser used comprises an emitter electrode and a ground electrode.
  • the emitter electrode discharges an ion cloud between the emitter and the receiver on application of a suitable voltage, preferably from -10 to 10kV but more preferably around the range -8 to 8kV.
  • the emitter electrode is preferably a point, tip or multiple tips or points for example a brush and is in electrical communication with a voltage source.
  • the emitter electrode is within 20cm, more preferably 15cm, especially preferably 10 cm and most preferably up to 5 cm from the nearest filter medium to be sterilised by bathing it in an ion cloud during activation of the ioniser when required. This distance is the distance from the tip of the emitter electrode to the nearest part of nearest filtration medium, more specifically the part of the filter medium which filters rather than for example a structural frame.
  • the receiving electrode is preferably a metallic part in the shape of a ring so that the resulting ion cloud is in three dimensions as the ions are spent away from the emitter and are then pulled towards the receiver.
  • the receiving electrode is in the form of a cage which extends away from the emitting electrode in an air flow direction. More preferably, the receiving electrode is in the form of a reticulated arrangement and which extends towards the filter. Such extension may present a hemispherical or partial cylindrical shape such that the receiving electrode is downstream in an air flow direction from the emitting electrode.
  • the emitter is centrally disposed between a receiver in the form of a ring. The emitter may be disposed pointing towards or away from the air flow during use but it is preferred that the emitter is pointed towards the surface to be sterilised, for example, an internal wall or a filter medium.
  • the air flow generator generates an air flow commensurate with sterilisation of an internal surface of the air purifier and/or a filter media for a period of from 1 second to 10 hours.
  • a method for sterilising a removable filter in an air purifier by subjecting the filter to HI NS light.
  • a method for sterilising a removable filter in an air purifier by (A) subjecting said removable filter to an air draft, and (B) subjecting said filter to HINS light.
  • (A) and (B) are carried out exclusively.
  • the surface to be sterilised is first subjected to an air draft and then when the air draft is stopped, the surface is exposed to a burst of HINS light.
  • the HINS light may come before the air draft.
  • the filter is also subjected to (C) a burst of ionisation from an optional ioniser.
  • the ionisation may come before or after either or both of (A) and (B).
  • sequence of air draft and then H I NS light, or vice versa is repeated such that the surface to be sterilised is subjected to both air draft and HINS light on an intermittent basis.
  • (A) has a duration of from 1 min to 10 hours
  • (B) has a duration of from 1 min to 10 hours
  • (C) has a duration of from 1 min to 10 hours.
  • an air purifier comprising a removable particulate or gas filter, an air flow generator, a means for controlling said air flow generator, a first air flow setting with an air filtration air flow speed and a second air flow setting which correlates with sterilisation of an internal surface of the air purifier and/or removable particulate or gas filter and a light source which emits HINS light.
  • the air purifier comprises an operable mode for sterilising an internal surface or a filter medium and whereby the air draft corresponds with said second air flow setting and this is activated either before or after a period of bathing in HINS light.
  • micro-organisms include gram positive bacteria, gram negative bacteria, spores, moulds and fungi as well as any viruses within said micro-organisms.
  • the air flow (A) speed (media velocity) measured at the removable filter is at least 0.1 cms 1 measured at the filter medium.
  • the measurement at the filter medium is taken from the spatial centre point on the fan side of the filter media surface. Where there is more than one filter medium, the one taken for the air draft measurement is the one which is closest to the air flow generator and so receives the air draft first.
  • the air flow speed measured at the removable filter is from 0.1 to 2.5 cms 1 . Most preferably, the air flow speed measured at the removable filter is from 0.8 to 1.2 cms -1 . This is known as ‘low air draft’ as it is below the ordinary media velocity used for air filtration.
  • the purifier ascertains the likelihood of conditions conducive to micro-organism growth and when such conditions are deemed to exist it actuates the air flow generator and/or the light source emitting HINS light to destroy the microbes on the filter, or even those on the internal surfaces of the purifier.
  • the processor determines that the conditions are conducive to micro-organism growth, for example with reference to inputs from a temperature sensor and a humidity sensor and then with reference to an appropriate look-up table, it either provides an indication, for example by way of a visual or audible signal, or electronically to a remote device such as a mobile phone so that the user is notified that the air flow generator should be employed, or it automatically actuates the fan or impeller at a low speed as described herein, or the ioniser, and which is sufficient to prevent microorganism growth or to directly destroy the micro-organisms. It is important to note that this activation of the ioniser or fan is appropriate only when the device is in stand-by mode or idle.
  • the purifier has first mode in which the choices are either: no action, where the conditions determined by the humidity sensor and temperature sensor are such that no or low micro-organisms growth is anticipated; an alert by way of an electronic signal to a mobile device to alert the user that conditions are favourable to micro-organisms and permitting the option for the user to actuate the fan; and a warning level where the user is warned that micro-organism growth is likely and strongly recommending to the user to actuate the fan or impeller, or the HINS light source.
  • a second mode may operate similarly in that indications are made determined by the input from the temperature and humidity sensors but instead of a warning or an alert, the machine is automatically turned on when conditions are such that micro-organism growth is likely.
  • the processor determines that the conditions are conducive to micro-organism growth it either provides an indication, for example by way of a visual or audible signal, or electronically to a remote device such as a mobile phone so that the user is notified that the air flow generator and/or ioniser should be employed.
  • Temperature sensors are known in the art and are commercially available from Sensirion. Suitable examples of temperature sensors include STS3x series.
  • Humidity sensors are known in the art and are commercially available from Sensirion. Suitable examples of humidity sensors include SHT3x series.
  • the means for controlling the air flow generator and/or light source based on input from said sensors is conducted automatically, for example by a processor.
  • the sensors sense the temperature and/or humidity on a continuous or intermittent basis and send information back to the processor.
  • the processor determines whether the conditions are conducive to micro-organism growth based on at least temperature or humidity.
  • the processor determines whether the conditions are conducive to micro-organism growth based on temperature and humidity. More preferably, the processor determines the likelihood of micro-organism growth additionally based on parameters such as geographical location, time of the day, week, month or season or even the pollution levels as well as any specific conditions that occur, for example virus pandemics or bush fires, and combinations of any of these.
  • the wet seasons are typically defined by the monsoon and occurs in the summer.
  • the summer in Europe and North America is characterised by drier weather.
  • the hemispheres have different seasonal characteristics.
  • the geographical location is determined by GPS or through the purifiers WIFI capability.
  • the purifier is powered by any suitable power source including internal sources, e.g. batteries, and external power sources.
  • the power is used to drive a motor which in turn powers at least the air flow generator and the ioniser where present.
  • the filter media comprises at least one of carbon, activated carbon, a non-woven, a thermoplastic, a thermosetting material, a porous foam, fibreglass, paper, a high loft spunbound web, a low loft spunbound web, a meltblown web and or a bi-modal fiber diameter meltblown media.
  • the removable particulate filter is a High Efficiency Particulate Air (HEPA) filter.
  • HEPA High Efficiency Particulate Air
  • the filter part of an air purifier is a vital part of its function, air purifiers are not commonly manufactured with a filter in place. They are practically always manufactured separately and most importantly often by a different commercial enterprise than of the manufacturer of the air purifier itself. It is also typical for a manufacturer of filters to manufacture filters for different air purifier models made by different manufacturers.
  • the particulate filter is to be contrasted with the pre-filter or any dust filter which is present. Pre-filters and dust filters are not considered HEPA filters as they do not have the particulate capturing capability exhibited by HEPA filters.
  • the filter is precharged before application to the air purifier.
  • Pre-filters are filters which have a low air resistance and also function as a poke guard, preventing the user from touching the volute or impeller assembly.
  • the pre-filters are not intended to exhibit any major effect in the context of air purification. They do not have the air resistance or particle entrainment capability of dedicated particulate filters.
  • Preferably the pre-filter is not a HEPA filter.
  • the purifier of the inventions also comprises a fan or impeller.
  • the fan may be a bladeless fan, an axial fan but it is preferred that the fan is a radial fan.
  • the air purifier comprises an ioniser.
  • the ioniser comprises a corona discharge tip and a receiving electrode.
  • the corona discharge tip is subjected to an appropriate electric voltage it generates an ion cloud between the tip and the receiving or ground electrode.
  • the ioniser is preferably disposed on the interior of said purifier.
  • the purifier comprises an ioniser additionally disposed on the exterior of said device.
  • any external ioniser is disposed at the top of the device. Locating the external ioniser at the top of the device means that domestic dust particles are ionised as they fall through the air towards the ground and are therefore more likely to aggregate as they become charged. As they become more aggregated they are more easily caught up in the air circulation pattern created by the device and so more easily filtered.
  • the ioniser is disposed in the interior of the device it is preferred that it is located before the removable particulate filter in an airflow direction.
  • the device comprises an interior ioniser and an exterior ioniser.
  • the exterior ioniser facilitating aggregation of domestic dust particles and the interior ioniser facilitating capture of the aggregated dust particles by the removable particulate filter.
  • the ionisation permits less dense filtration media and low air speed (fan) speeds.
  • the air purifier comprises, in an air flow direction, a fan, a HINS light source, and a removable filter.
  • the HINS light source is disposed so as to bathe the removable filter in HINS light when the light source is operating.
  • the HINS light source is sufficiently close to the removable filter to destroy micro-organisms during operation.
  • at least one HINS light source is from 1 to 20cm from the closest removable filter, more preferably from 2 to 12 cm.
  • the air flow generator is housed within a volute and more preferably, said ioniser is disposed at or near an outlet on the volute.
  • the volute comprises an air flow outlet through which air flows from the air flow generator towards the removable filter medium, said outlet being defined by a perimeter and preferably comprising a receiving electrode and an associated emitting electrode such that between said receiving and emitting electrode there is formed an ion cloud when emitting electrode is subjected to an appropriate voltage.
  • the receiving electrode may thus be disposed around a portion or all of the perimeter of the outlet.
  • the emitting electrode or corona discharge tip is disposed substantially centrally in the outlet such that air flowing from the volute and towards the removable filter or filters is subjected to an ion cloud.
  • the air purifier comprises a first and second removable filter medium angled with respect to one another such that there exists an acute angle between said first and second media, said acute angle facing an air flow direction, and said purifier comprising an ioniser which during use generates an ion cloud between said first and second filter media.
  • the filters are bathed in an ion filed. While in ordinary circumstances the ion cloud is intended to ionise any particles entrained within the air flow we have surprisingly found that the ion cloud alone provides significant sterilisation of the filter media and internal surfaces of the purifier. This is particularly useful when the purifier is in stand-by mode or turned off whether to conserve energy or merely because the user believes that the air quality is sufficiently good.
  • the ioniser uses considerably less energy than the air flow generator and so it is thus possible to maintain sterile conditions internally without having to turn on the fan.
  • the emitting electrode is disposed substantially between an imaginary line between a proximal end of said first and second filter medium, said proximal ends being towards the air flow generator.
  • the air purifier comprises a pair of filter media angled relative to one another such that they form an acute angle between them.
  • the apex ends of the filter media are touching or are close to one another so that they present an inverted book arrangement with the tip pointing in an air flow direction and the proximal ends of the filter media facing towards the air flow generator.
  • the ioniser is disposed substantially between the proximal ends of the filter media such that the filter media are bathed in an ion filed in use. More preferably, the emitting electrode emits an ion stream in an air flow direction.
  • figure 1 shows a cross section of an embodiment.
  • figure 1 shows an air purifier (1) comprising a housing (2) and a fan (3) contained in a volute (4).
  • the fan (3) is shown in simplified form with no attempt made to describe its physical characteristics or placement.
  • the volute (4) comprises an outlet (5) through which air is passed from the fan (3) to the filters (6).
  • the filters (6) are connected at their top edges (7) to form an apex.
  • the volute outlet (5) also comprises a HINS light source (14) for generating a HINS light which is directed towards the filters (6) and an ion emitter (9) for creating an ion cloud during use between the emitter (9) and the receiver (8).
  • air passes from ambient into the purifier through air inlets (10) which are secured with prefilters (12) which act as an initial filter preventing large items entrained in the air flow from entering and blocking the internal mechanics of the device but also acting as a poke guard.
  • FIG 2 is a schematic showing how the HINS light generated by the HINS light source bathes the filters in HINS light in use. Shown is the volute (4) and an LED HINS light source (14) which generates HINS light when an appropriate voltage is applied. Also shown is the ion emitter (9) and the ion cloud (20).
  • the HINS light (21) extends away from the LED HINS light source (14) and bathes the filters (6) and provides a sterilisation effect.
  • HINS illumination sources peak wavelength maxima at395nm and 405nm were tested. Following tests were carried out to test the efficacy of the two HINS sources:
  • a 200uL microbial suspension containing Staphylococcus Aureus was loaded on a 5 x 5 cm polypropylene based air filter (H11 grade).
  • the suspension contained 0.1% Tween20 in order to ensure proper wetting of the liquid suspension in the filter media.
  • the filter media were exposed to the 405nm HINS source such that a uniform light intensity of 4000lux units was incident on the surface of the media.
  • the test was carried out at 3 different exposure periods viz. , 2h, 3h and 4h.
  • the temperature and humidity during the test were maintained at 25degC and 50-60% relative humidity respectively.
  • the microbes were extracted from the filter using a saline solution by a 2min vortexing process.
  • the log germ inactivation of HINS was calculated from the germ counts extracted from the samples after HINS exposure and comparing it against the germ counts extracted from the filter sample immediately after loading the germs.
  • the control tests were carried out under the same conditions without HINS exposure.
  • the below table shows the logarithmic germ inactivation at the various exposure periods tested.
  • both the HINS sources were able to show a significant reduction in microbial levels as compared to the control tests.
  • the 395nm HINS sources showed higher efficacy as compared to that of 405nm HINS source. Also, the performance of the 405nm source seems to saturate after 3h of exposure while the response of 395nm source remained linear in the time durations tested.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
  • Filtering Materials (AREA)
  • Electrostatic Separation (AREA)
  • Compressor (AREA)

Abstract

L'invention concerne un purificateur d'air comprenant un générateur de flux d'air, un moteur pour le ventilateur, un filtre amovible et une source de lumière HINS, ladite source de lumière HINS émettant de la lumière ayant une longueur d'onde pic de 390 à 398 nm.
PCT/EP2022/066980 2021-07-01 2022-06-22 Purificateur d'air Ceased WO2023274802A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP21183050 2021-07-01
EP21183050.0 2021-07-01

Publications (2)

Publication Number Publication Date
WO2023274802A1 true WO2023274802A1 (fr) 2023-01-05
WO2023274802A8 WO2023274802A8 (fr) 2023-02-23

Family

ID=76744646

Family Applications (2)

Application Number Title Priority Date Filing Date
PCT/EP2022/066979 Ceased WO2023274801A1 (fr) 2021-07-01 2022-06-22 Purificateur d'air
PCT/EP2022/066980 Ceased WO2023274802A1 (fr) 2021-07-01 2022-06-22 Purificateur d'air

Family Applications Before (1)

Application Number Title Priority Date Filing Date
PCT/EP2022/066979 Ceased WO2023274801A1 (fr) 2021-07-01 2022-06-22 Purificateur d'air

Country Status (1)

Country Link
WO (2) WO2023274801A1 (fr)

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190125904A1 (en) 2017-10-30 2019-05-02 Hubbell Incorporated Pulsing High Intensity Narrow Spectrum Light
US20190167833A1 (en) 2017-12-05 2019-06-06 Jin-Ting Hou Air purifiler
KR20200044333A (ko) 2018-10-19 2020-04-29 엘지이노텍 주식회사 정화 장치
KR102204085B1 (ko) 2019-06-18 2021-01-15 차병호 살균기능이 구비된 공기정화장치

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20190125904A1 (en) 2017-10-30 2019-05-02 Hubbell Incorporated Pulsing High Intensity Narrow Spectrum Light
US20190167833A1 (en) 2017-12-05 2019-06-06 Jin-Ting Hou Air purifiler
KR20200044333A (ko) 2018-10-19 2020-04-29 엘지이노텍 주식회사 정화 장치
KR102204085B1 (ko) 2019-06-18 2021-01-15 차병호 살균기능이 구비된 공기정화장치

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
BACHE S E ET AL: "Universal decontamination of hospital surfaces in an occupied inpatient room with a continuous 405 nm light source", JOURNAL OF HOSPITAL INFECTION, vol. 98, no. 1, 15 July 2017 (2017-07-15), pages 67 - 73, XP085314994, ISSN: 0195-6701, DOI: 10.1016/J.JHIN.2017.07.010 *

Also Published As

Publication number Publication date
WO2023274801A8 (fr) 2023-02-23
WO2023274801A1 (fr) 2023-01-05
WO2023274802A8 (fr) 2023-02-23

Similar Documents

Publication Publication Date Title
JP2026062806A (ja) 空気清浄機
JP2026001223A (ja) 空気清浄機
GB2609000A (en) An air purifier
EP4103893B1 (fr) Purificateur d'air
WO2023274802A1 (fr) Purificateur d'air
US12313279B2 (en) Air purifier
CN113339923B (zh) 空气净化器
WO2025228684A1 (fr) Purificateur d'air
CN214949609U (zh) 空气净化器
CN206510731U (zh) 一种高效香薰空气净化器
HK40073511A (en) Air purifier
HK40078111A (en) Air purifier
HK40073248A (en) Air purifier
CN218511114U (zh) 空气消毒净化器
CN213221655U (zh) 一种空气净化装置
CN114251824A (zh) 一种滤芯及空气净化器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22733675

Country of ref document: EP

Kind code of ref document: A1

DPE1 Request for preliminary examination filed after expiration of 19th month from priority date (pct application filed from 20040101)
NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22733675

Country of ref document: EP

Kind code of ref document: A1