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WO2022234260A1 - Dispositif de capteur de qualité d'air - Google Patents

Dispositif de capteur de qualité d'air Download PDF

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Publication number
WO2022234260A1
WO2022234260A1 PCT/GB2022/051119 GB2022051119W WO2022234260A1 WO 2022234260 A1 WO2022234260 A1 WO 2022234260A1 GB 2022051119 W GB2022051119 W GB 2022051119W WO 2022234260 A1 WO2022234260 A1 WO 2022234260A1
Authority
WO
WIPO (PCT)
Prior art keywords
air
housing
sensor device
quality sensor
air quality
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/GB2022/051119
Other languages
English (en)
Inventor
Matthew Edward Thomas White
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.)
Elta Group Ltd
Original Assignee
Elta Group Ltd
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 Elta Group Ltd filed Critical Elta Group Ltd
Publication of WO2022234260A1 publication Critical patent/WO2022234260A1/fr
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

Links

Classifications

    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • G01N33/0009—General constructional details of gas analysers, e.g. portable test equipment
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/0004—Gaseous mixtures, e.g. polluted air
    • 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
    • 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
    • F24F2110/00—Control inputs relating to air properties
    • F24F2110/50—Air quality properties
    • F24F2110/64—Airborne particle content
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
    • Y02B30/00—Energy efficient heating, ventilation or air conditioning [HVAC]
    • Y02B30/70—Efficient control or regulation technologies, e.g. for control of refrigerant flow, motor or heating

Definitions

  • the present invention relates to an air quality sensor device which is adapted for determining the composition of at least one component of air in a room, and preferably which is wirelessly communicable with other ventilation and filtration systems for the room.
  • an air quality sensor device comprising: a base, an inner cover element mountable to the base to form a first housing chamber, and a housing cap which is receivably engagable over the inner cover element to form a second housing chamber, the inner cover element having an air flow vent to interconnect the first and second housing chambers; an air inlet in communication with the first housing chamber; an air outlet in communication with the second housing chamber; an electrically-energisable fan located in the first housing chamber for driving air between the air inlet and the air outlet via the first and second housing chambers, the outlet being spaced apart from the air flow vent; and at least one sensor element mounted in the first housing chamber.
  • the air quality sensor device of the present invention there are two separate chambers within; a first chamber which houses and protects the electrical components, and in particular the sensors, and a second chamber which forms an exhaust channel for the device. Dust cannot thus ingress into the first chamber, but the housing cap can be removed for ease of cleaning the second chamber, where dust may still accumulate. This cleaning process can thus be achieved without the user needing to access the electronics.
  • the at least one sensor element may be mounted to a circuit substrate which is vertically mounted in the first housing chamber.
  • Two said circuit substrates may be provided, the circuit substrates acting as baffles to direct airflow within the first housing chamber.
  • a pair of circuit substrates typically a sensor board and a communications board will be able to form a passage through the device for air channelling without the need to provide additional ducting.
  • an exhaust of the electrically-energisable fan may be located at or adjacent to a floor of the base.
  • the air flow vent may be positioned at a top of the inner cover element to thereby define a vertical air flow path from the exhaust of the electrically-energisable fan in the first chamber.
  • the at least one sensor may be provided on the vertical air flow path.
  • the vertical flow path has a continuous air flow across it in use due to the channelling effects described. Positioning of the sensors on this air flow path reduces the risk of sensing of recirculated air which would otherwise skew the measurements of the sensor.
  • the air inlet may be positioned on a first side of the housing, and the air outlet on a second side of the housing which is opposite the first side of the housing.
  • the housing cap may be releasably engageable with the base to permit removal for cleaning.
  • the housing cap may be magnetically engagable with the base.
  • Releasable engagement of the housing cap allows for the user to easily access the inner cover element to dust and sanitise.
  • a said sensor element may be a particulate sensor, and the electrically-energisable fan is a fan of the particulate sensor.
  • one option is to utilise the existing fan provided with a particulate sensor, which can be sufficient to drive air though a compact device. This obviate the need to provide a specific additional fan or motor for the device.
  • the inner cover element may comprise a channel recess on an outer surface thereof which forms the second housing chamber with the housing cap.
  • the housing cap be have an internal volume which snugly fits the inner cover element therein. This allows the device to remain compact.
  • the air flow vent may be elevated with respect to the air outlet. If there is a fall between the air flow vent and air outlet, the risk of dust ingress via the air outlet into the air flow vent is significantly reduced.
  • a vertical turn on the inflow into the air inlet reduces the risk of dust ingress into the inlet, since there is formed a vertical barrier to entry into the electrically-energisable fan.
  • the device may further comprise a hairpin duct which forms the vertical turn.
  • the duct having a hairpin bend formed therein forms a near vertical wall which inhibits the ingress of larger dust particles into the first housing chamber, which can then be cleaned out once the housing cap is removed.
  • a flow path between the air inlet and the electrically-energisable fan may be at least in part formed by a channel on the outside of the inner cover element.
  • the channel for the air inlet reduces space requirements for the air quality sensor device as a whole.
  • the inner cover element may be or substantially be light-transmissible, and further comprising at least one illuminable status-indicator element positioned in the first chamber.
  • Status indicators typically coloured lights, are useful for outputting information to the user. Under normal circumstances, however, the lights would need to extend to an outer surface of the device. If the inner cover element is light transmissible, however, illumination signals can be emitted without needing to provide electrical contacts outside of the first housing chamber.
  • an air quality sensor device comprising: a housing having an air inlet and an air outlet; an electrically- energisable fan located in the housing for driving air between the air inlet and the air outlet; first and second circuit substrates arranged in the housing to form a baffle for air between the air inlet and the air outlet; and at least one sensor element mounted to the first and/or second circuit substrate.
  • an air quality sensor device comprising: a housing having an air inlet and an air outlet; and a particulate sensor at or adjacent to the air inlet, the particulate sensor comprising an electrically-energisable fan for driving air between the air inlet and the air outlet.
  • the use of a particulate sensor for driving the air flow through the device reduces the overall size and cost to manufacture the device, allowing for the creation of a more portable air quality sensor device to be created.
  • an air quality sensor device comprising: a housing having an air inlet and an air outlet; an electrically- energisable fan located in the housing for driving air between the air inlet and the air outlet; a circuit substrate arranged vertically or substantially vertically in the housing; and at least one sensor element mounted to the circuit substrate.
  • Figure 1 shows a front perspective representation of one embodiment of an air quality sensor device in accordance with the first aspect of the invention
  • Figure 2 shows a rear perspective representation of the air quality sensor device of Figure 1 ;
  • Figure 3 shows an exploded front perspective representation of the air quality sensor device of Figure 1 ;
  • Figure 4 shows an exploded rear perspective representation of the air quality sensor device of Figure 1;
  • Figure 5 shows a vertical cross-section through the air quality sensor device of Figure 1 ; and Figure 6 shows the air quality sensor device of Figure 5 indicating an air flow pathway through the device using the block arrows.
  • the air quality sensor device 10 is intended to be a freestanding unit, drawing in air, determining various particulate and gas quantities in the air, before communicating with other filtration and ventilation devices accordingly.
  • the air quality sensor device 10 has a base 12 which is preferably weighted so that the air quality sensor device 10 can stand in an upright or vertical condition without toppling.
  • a housing cap 14 is provided which is receivably engagable with the base 12 to form the outer surface of the air quality sensor device 10.
  • the housing cap 14 may have a tapered design which has a pleasing smooth aesthetic appearance.
  • Magnets may be provided at an interface between the housing cap 14 and the base 12, to permit magnetic releasable engagement.
  • An air inlet 16 is provided on the front side 18a of the air quality sensor device 10, since this is most likely to be the room-facing direction of the air quality sensor device 10.
  • the air inlet 16 is here formed as a notch positioned at a bottom edge of the housing cap 14, which then forms an opening of the air inlet 16 once the housing cap 14 is in position on the base 12.
  • the air inlet 16 is thus positioned at a top edge of the base 12. This air inlet 16 position assists with the direction of air flow through the air quality sensor device 10, as will be described in more detail below, but it will be apparent that ducting or channels inside the air quality sensor device 10 could create the same effect for an air inlet 16 positioned elsewhere on the air quality sensor device 10.
  • An air outlet 20 is provided on the rear side 18b of the air quality sensor device 10.
  • the air outlet 20 may be formed as a notch positioned at a bottom edge of the housing cap 14, which then forms an opening of the air outlet 20 once the housing cap 14 is in position on the base 12.
  • the air outlet 20 is thus positioned at an upper edge 22 of the base 12.
  • the housing cap 14 preferably is rotationally symmetric, so that it can be positioned with the notches forming either of the air inlet 16 and air outlet 20.
  • a power inlet 24 is provided preferably on the rear side 18b of the air quality sensor device 10. This allows the air quality sensor device 10 to be powered without having a detrimental effect on the appearance of the front side 18a.
  • the power inlet 24 is positioned at a lower portion of the base 12, since this is likely where the electronic components will be located.
  • FIGS 3 and 4 shows the structure of the air quality sensor device 10 in more detail.
  • the base 12 forms a receiver for the electronic components of the air quality sensor device 10.
  • the upstanding lip 26 terminates at a position inline with the air inlet 16 and air outlet 20 so as to not occlude airflow thereacross.
  • first and second circuit substrates 28a, 28b which are interconnectable.
  • These circuit substrates 28a, 28b are intended to be mounted into the base 12 in a vertical or substantially vertical condition, with the circuit substrates 28a, 28b being thus being perpendicular or substantially perpendicular to a support surface onto which the air quality sensor device 10 is mounted.
  • the base 12 may have a grip element 30 on its lower surface to prevent slippage on said support surface.
  • the base 12 may include one or more locators 32 integrally or otherwise formed therewith which are configured to support the first and second circuit substrates 28a, 28b in the vertical condition. These locators 32 could be part of the floor of the base 12 and/or part of the upstanding walls of the base 12.
  • the first circuit substrate 28a includes a power supply 34 which is in communication with an electrically energisable fan 36.
  • the electrically energisable fan 36 has an enclosed housing with a fan inlet 38 at or adjacent to the air inlet 16, and an exhaust 40 positioned at or adjacent to a floor of the base 12.
  • the electrically energisable fan 36 and power supply 34 therefore provide much of the weighting of the base 12, being comparatively heavy to the base 12 itself.
  • T o connect the air inlet 16 to the fan inlet 38, there may be provided a ducting component 42, which ensures that there is an airflow channel which extends from the air inlet 16 into the electrically energisable fan 36 without needing to provide significant moulding internally to the base 12.
  • the ducting component 42 is formed as a hairpin duct, which thereby creates a vertical turn prior in the air flow path between the air inlet 16 and the fan inlet 38. This helps to prevent large dust particles falling into the electrically- energisable fan 36, with the hairpin duct acting as a wall or similar barrier to physical entry into the fan inlet 38.
  • the hairpin duct has a substantially pyramidal profile with a lower air inlet and an internal triangular baffle which urges air up and then down into the fan inlet 38.
  • the power supply 34 may have a connector which engages with an adaptor piece 44 of the base 12.
  • This adaptor piece 44 will be dimensioned for the power coupling to be used with the device, such as a USB power adaptor, and thus may be manufactured as a separate piece to the base 12, though it will be apparent that it could be unitarily formed with the base 12.
  • the first circuit substrate 28a may also include the sensor elements 46a, 46b, 46c of the air quality sensor device 10.
  • the depicted embodiment illustrates a carbon dioxide sensor 46a, such as a low-power infra-red sensor, a particulate sensor 46b, and additional sensing packages 46c.
  • the circuit substrate 28a itself can act as a baffle to attempt to direct airflow across the sensor elements 46a, 46b, 46c.
  • the electrically energisable fan 36 is the fan of the particulate sensor 46b, and therefore, unusually, no separate dedicated fan unit is required.
  • the first circuit substrate 28a also here includes a through-board stacking connector 48 for engaging with the second circuit substrate 28b, which acts as a communications board, having one or more communications elements 50 thereon.
  • these would be Wi-Fi (RTM) communicators designed for communication with air filtration or ventilation units as part of an air conditioning system. It will be appreciated that a non- connected version of the air quality sensor device 10 could be provided, and the second circuit substrate 28b and/or components thereon could be removed.
  • An inner cover element 52 is provided which engages with the upstanding lip 26 of the base 12 to seat in position.
  • One or more fasteners 54 such as screws, can be provided for securing the inner cover element 52 to the base 12. It is not intended that the user access the first housing chamber 56 that is formed by the base 12 and inner cover element 52.
  • the inner cover element 52 may have a seal 58 at its lower perimeter which provides an airtight seal with the base 12. This ensures that the only air access to the first housing chamber 56 is via the air inlet 16, which accesses the first housing chamber 56 through the ducting component 42, and an air flow vent 62 which is provided at an top surface 64 of the inner cover element 52.
  • the ducting component 42 could, of course, be provided as part of the inner cover element 52.
  • the inner cover element 52 may have one or more locator portions 66 thereon which assist with alignment to the housing cap 14. These are formed as linear channels on the side of the inner cover element 52 which matingly engage with corresponding structures on the housing cover 14.
  • the air flow vent 62 is preferably positioned at least in partial contact with the top surface 64, but may additionally or alternatively extend at least in part down a rear side of the inner cover element 52.
  • the air flow vent 62 is designed to direct air towards the air outlet 20.
  • a channel recess 68 which is positioned on an outside of the inner cover element 52 which forms a second housing chamber 70 with the housing cap 14.
  • This second housing chamber 70 forms an exhaust duct for the air quality sensor device 10 towards the air outlet 20.
  • a corresponding channel 72 may be provided on a front side of the inner cover element 52 which at least in part forms an air flow path between the air inlet 16 and the electrically-energisable fan 36.
  • the ducting component 42 may be receivably engagable in this channel 72.
  • Figure 5 shows the internals of the fully assembled air quality sensor device 10.
  • the first housing chamber 56 fills most of the internal volume of the air quality sensor device 10, and encloses all of the electronic components. Access to these components is therefore very restricted.
  • the second housing chamber 70 is comparatively small, but allows for the air flow vent 62 to be physically dislocated from the air outlet 20. This significantly reduces the risk of dust ingress into the first housing chamber 56. This is enhanced by not only the air outlet 56 being downstream of the air flow vent 58, but also being physically lower than the air flow vent 58, and therefore there is a gravitational effect which inhibits dust ingress.
  • the air flow path can be seen from Figure 6.
  • Air is drawn in through the air inlet 16 by the electrically energisable fan 36, up through the ducting component 42 and around the hairpin turn.
  • the hairpin turn may be a 180° or substantially 180° turn, or some form of U-turn.
  • the 180° turn may maximise a compaction of the flow path.
  • a particulate filter is positioned downstream of the electrically energisable fan 36 so as to protect the downstream sensors from particulate matter.
  • the shape of the particulate sensor 46b used is such that the exhaust 40 is positioned at right angles to the fan inlet 38. This is very useful in the present context, as it means that air can be vented into the first housing chamber 56 at the floor of the base 12. As such, air travel within the first housing chamber 56 follows a largely linear path in an upward vertical direction.
  • first and second circuit substrates 28a, 28b serve to form a channel up through the centre of the first housing chamber 56, creating a baffle.
  • the second circuit substrate 28b is dimensioned so as to abut the top of the electrically energisable fan 36, thereby discouraging airflow away from the said channel.
  • the air flow path between the first and second circuit substrates 28a, 28b is here created by the distance enforced by the stacking connector 48, but alternative connection means between the first and second circuit substrates 28a, 28b could be considered, for example, one or more spacers.
  • one or more internal walls of the inner cover element 52 could be used to generate airflow direction capabilities, or indeed a separate dedicated baffle unit. Furthermore, it may be possible to provide sealing between the circuit substrates 28a, 28b and the base 12 and/or the inner cover element 14 which inhibits air flow around the circuit substrates 28a, 28b. This could be in the form of adhesive, or a potting compound, for example.
  • the baffle has the effect of urging air past the sensor packages 46c without creating too much turbulence. It is desirable to prevent air lingering inside the first housing chamber 56, as this will result in inaccurate measurements at the sensors.
  • the air flow is directed up and out of the first housing chamber 56 and through the air flow vent 62 at the top of the first housing chamber 56.
  • the provision of several apertures at the air flow vent 62 limits the risk of rebound of airflow within the first housing chamber 56, instead, forcing air into the exhaust channel that is the second housing chamber 70. Air is thus urged out of the air outlet 20.
  • the air flow path through the air quality sensor device 10 is therefore well-defined to ensure that freshly obtained air is drawn through the inlet and passed across the various sensors in a sequential manner. There is no opportunity for recirculation of the air.
  • the air flow path is also constructed to as to directly inhibit the accumulation of dust in the air inlet 16 and air outlet 20, due to the gravitational barriers respectively positioned at either end of the device 10. This has the effect of creating a tortuous or serpentine air flow path in the vertical direction, as the air flows through the air quality sensor device 10.
  • the issue of dust accumulation is also further improved by the removability of the housing cap 14. Since the housing cap 14 can be readily lifted off the base 12. The user can then dust the outer surfaces of the inner cover element 52 and thus remove larger dust particles which would not otherwise be suspended in the air, and therefore should not be sensed. The gravitational barriers provided ensure that any dust accumulated settles away from access points to the first housing chamber 56, and thus cleaning is straightforward.
  • a further advantage of the inner cover element 52 is that, if it is provided so as to be at least in part light-transmissible, then one or more illumination elements, typically in the form of light-emitting diodes (LEDs), can be provided as part of the electrical componentry.
  • the illumination elements can be linked to a processor of the air quality sensor device 10, which allow for a visual output of a status of the air quality sensor device 10.
  • a green LED could be used to indicate a correct activation status of the air quality device 10
  • amber or red LEDs could be used to indicate either a device problem or an issue with the air quality. If the housing cap 14 is at least in part translucent, then this will create a pleasing aesthetic appearance.
  • the air quality sensor device is defined as portable, it will be appreciated that the device may not necessarily be portable. Additionally, although described as portable this would not necessitate a portable power supply and would not preclude the device from being energised by a mains or utility power supply. The device may be considered to be portable due to its portable size.

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  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Health & Medical Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Food Science & Technology (AREA)
  • Medicinal Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Combustion & Propulsion (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Air Conditioning Control Device (AREA)
  • Investigating Or Analysing Materials By Optical Means (AREA)

Abstract

L'invention concerne un dispositif de capteur de qualité d'air (10) qui comprend : une base (12), un élément couvercle interne (52) pouvant être monté sur la base (12) pour former une première chambre de logement (56), et un capuchon de boîtier (14) qui peut venir en prise de façon à pouvoir être reçu sur l'élément couvercle interne (52) pour former une seconde chambre de logement (70), l'élément couvercle interne (52) ayant un évent d'écoulement d'air (62) pour interconnecter les première et seconde chambres de logement (56, 70) ; une entrée d'air (16) en communication avec la première chambre de logement (56) ; une sortie d'air (20) en communication avec la seconde chambre de logement (70) ; un ventilateur pouvant être excité électriquement (36) situé dans la première chambre de logement (56) pour entraîner l'air entre l'entrée d'air (16) et la sortie d'air (20) par l'intermédiaire des première et seconde chambres de logement (56, 70), la sortie d'air (20) étant espacée de l'évent d'écoulement d'air (62) ; et au moins un élément capteur (46a, 46b, 46c) monté dans la première chambre de logement (56).
PCT/GB2022/051119 2021-05-05 2022-05-04 Dispositif de capteur de qualité d'air Ceased WO2022234260A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
GB2106430.8 2021-05-05
GB2106430.8A GB2606375B (en) 2021-05-05 2021-05-05 Air quality sensor device

Publications (1)

Publication Number Publication Date
WO2022234260A1 true WO2022234260A1 (fr) 2022-11-10

Family

ID=76301015

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/GB2022/051119 Ceased WO2022234260A1 (fr) 2021-05-05 2022-05-04 Dispositif de capteur de qualité d'air

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GB (1) GB2606375B (fr)
WO (1) WO2022234260A1 (fr)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112198287A (zh) * 2020-10-14 2021-01-08 陈淑清 一种带有处理一氧化碳功能的汽车空气检测传感器
WO2021011589A1 (fr) * 2019-07-18 2021-01-21 Clean Air Group, Inc. Système de purification de la qualité de l'air intérieur pour un système de ventilation et de refroidissement de chauffage d'un bâtiment

Family Cites Families (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4840181B2 (ja) * 2007-02-13 2011-12-21 パナソニック株式会社 空気清浄機

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2021011589A1 (fr) * 2019-07-18 2021-01-21 Clean Air Group, Inc. Système de purification de la qualité de l'air intérieur pour un système de ventilation et de refroidissement de chauffage d'un bâtiment
CN112198287A (zh) * 2020-10-14 2021-01-08 陈淑清 一种带有处理一氧化碳功能的汽车空气检测传感器

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Publication number Publication date
GB2606375A (en) 2022-11-09
GB202106430D0 (en) 2021-06-16
GB2606375B (en) 2025-02-05

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