EP4259981A1 - Dispositif de régulation de température - Google Patents

Dispositif de régulation de température

Info

Publication number
EP4259981A1
EP4259981A1 EP21838997.1A EP21838997A EP4259981A1 EP 4259981 A1 EP4259981 A1 EP 4259981A1 EP 21838997 A EP21838997 A EP 21838997A EP 4259981 A1 EP4259981 A1 EP 4259981A1
Authority
EP
European Patent Office
Prior art keywords
temperature control
control device
unit
heating
housing
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.)
Pending
Application number
EP21838997.1A
Other languages
German (de)
English (en)
Inventor
Andreas Stratmann
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.)
DBK David and Baader GmbH
Original Assignee
DBK David and Baader GmbH
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
Priority claimed from DE102021106028.1A external-priority patent/DE102021106028A1/de
Application filed by DBK David and Baader GmbH filed Critical DBK David and Baader GmbH
Publication of EP4259981A1 publication Critical patent/EP4259981A1/fr
Pending 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
    • F24F13/00—Details common to, or for air-conditioning, air-humidification, ventilation or use of air currents for screening
    • F24F13/20—Casings or covers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
    • F24F5/00—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater
    • F24F5/0042—Air-conditioning systems or apparatus not covered by F24F1/00 or F24F3/00, e.g. using solar heat or combined with household units such as an oven or water heater characterised by the application of thermo-electric units or the Peltier effect
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H3/00—Air heaters
    • F24H3/02—Air heaters with forced circulation
    • F24H3/04—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element
    • F24H3/0405—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between
    • F24H3/0411—Air heaters with forced circulation the air being in direct contact with the heating medium, e.g. electric heating element using electric energy supply, e.g. the heating medium being a resistive element; Heating by direct contact, i.e. with resistive elements, electrodes and fins being bonded together without additional element in-between for domestic or space-heating systems
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H9/00—Details
    • F24H9/18—Arrangement or mounting of grates or heating means
    • F24H9/1854—Arrangement or mounting of grates or heating means for air heaters
    • F24H9/1863—Arrangement or mounting of electric heating means
    • F24H9/1872—PTC
    • 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
    • F24F8/22—Treatment, e.g. purification, of air supplied to human living or working spaces otherwise than by heating, cooling, humidifying or drying by sterilisation using UV light
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24H—FLUID HEATERS, e.g. WATER OR AIR HEATERS, HAVING HEAT-GENERATING MEANS, e.g. HEAT PUMPS, IN GENERAL
    • F24H2250/00—Electrical heat generating means
    • F24H2250/04—Positive or negative temperature coefficients, e.g. PTC, NTC

Definitions

  • the invention relates to a temperature control device, in particular a heating device according to the preamble of patent claim 1 .
  • Such heaters are used, for example, for heating premises, with a fan for conveying an air flow and a heating device, for example, being arranged in a common housing, via which the air flow generated by the fan is tempered.
  • a heating device instead of the heating device, another air conditioning device can also be used in order to bring the air flow to a predetermined temperature.
  • the heater is integrated into the air-conducting ducts (duct heater), but in principle the heater can also be operated as an independent unit, and an automotive application is also possible.
  • the exhaled air can contain viruses that do not move individually in the air, but are enclosed in larger droplets (aerosols).
  • aerosols form conglomerates with other particles, such as suspended matter, which are usually referred to as nuclei.
  • suspended matter can be separated out in a manner known per se with so-called HEPA filters, which are used, for example, in the medical field and in laboratories (clean rooms).
  • the document DE 11 2017 002 138 T5 describes an air conditioning device for a vehicle in which UV light is applied to the air to be air-conditioned.
  • KR 100826320 B1 discloses a ceramic heater and UV LED lamps.
  • JP 2019-038273 A shows a device for generating cold air and hot air.
  • a filter and a sterilizing lamp are provided at the entrance of an air purification unit.
  • a UV lamp is also provided downstream.
  • the invention is based on the object of creating a temperature control device that enables effective germ reduction.
  • the temperature control device also known as an air conditioning device, in particular a heating device, has a one-part or multi-part housing which guides an air flow and in which a temperature control device, in particular a heating unit for temperature control of the air flow, is arranged.
  • a germ reduction device is integrated into the housing of the temperature control device, via which viruses, bacteria, fungi or other harmful microorganisms carried along with the air flow, for example, can be retained or destroyed by splitting the DNA.
  • the temperature control device is designed as an electrical heater, in particular a room heater, so that the temperature control device is a heating unit for heating the air flow.
  • the air flow is generated by a fan integrated into the housing.
  • the air flow is generated by a decentralized unit.
  • the germ reduction device is a filter for separating the aforementioned pollutants from the air flow to be tempered.
  • a filter can be designed as a HEPA filter, for example.
  • the germ reduction device can be designed as an irradiation unit that emits radiation that is not harmful to humans but is sufficient to split the DNA of the pollutant.
  • a power is, for example, in a range of more than 400 joules/ m2
  • the germ reduction device for example the filter and/or the irradiation unit, can be arranged upstream and/or downstream of the temperature control device, in particular the heating unit.
  • the fan either through the air flow sucks in through the temperature control device or conveys through it with overpressure. If the germ reduction device is positioned upstream of the temperature control device, in particular the heating unit, thermal damage to the germ reduction device can be ruled out.
  • the irradiation unit is designed with a multiplicity of radiators, which are arranged in a spatially distributed manner on the circumference of a flow channel and/or a housing part of the irradiation unit.
  • the irradiation unit emits UV-C radiation.
  • a particularly effective germ reduction is obtained when the UV-C radiation is emitted by LEDs.
  • LEDs are mechanically very stable and can be produced in a relatively environmentally friendly manner.
  • the effective power of a UV-C LED is in the optimum wavelength range within which the microorganisms are destroyed/decomposed.
  • Another advantage of the LEDs is that they are very compact, so that the flow is not influenced by the radiators and the entire temperature control unit can be designed with small dimensions.
  • a suitable lens system can be used to set broad radiation, so that practically every volume element of the flow can be exposed to UV-C radiation.
  • the respective central axes of the LEDs which are directed from a base along a central emission direction and possibly along the lens system, are preferably set at an angle of 0° to 180° to the flow direction of the air.
  • An angle of 90° can be advantageous for manufacturing and device-related reasons.
  • Optimum air disinfection can be achieved at an angle of 45°.
  • the air flow conveyed through the temperature control device according to the invention can be either laminar or turbulent.
  • a turbulent flow can Germ reduction can be further optimized, since each volume element is certainly exposed to the radiation.
  • the irradiation unit has a reflector for reflecting the radiation, its effect can be intensified without the power consumption of the irradiation unit having to be increased.
  • the temperature control device is designed as a heating unit, it is particularly preferred that this has a heating element whose heat is released to the air flow via heat transfer surfaces, for example corrugated fins.
  • the heating element is designed as an electrical heating element and can be designed, for example, as a PTC resistance heating element, as a wire resistance heating element or the like.
  • the temperature control device is designed for cooling, it can be designed as an electrical cooling unit, which is designed with Peltier elements, for example. Of course, other cooling units can also be implemented.
  • the temperature control device can also be designed in such a way that it enables both cooling and heating.
  • the heating device is designed with an electronics housing in which the electrical/electronic components for controlling the fan, the temperature control device and the germ reduction device are arranged.
  • the structure of the temperature control device according to the invention is particularly simple if the electronics housing protrudes approximately in the radial direction from the tubular heater.
  • a hollow guide flange can be formed on the outer circumference of the housing.
  • Figure 1 is a three-dimensional view of a first embodiment of a space heater according to the invention.
  • FIG. 2 shows a rear view of the space heater according to FIG. 1;
  • Figure 3 is a side view of the space heater shown in Figures 1 and 2;
  • Figure 4 is a front view of the space heater shown in Figures 1 to 3;
  • Figure 5 is a sectional view of the space heater along line A-A of Figure 4.
  • Figure 6 is a sectional perspective view of the space heater along line B-B of Figure 4.
  • FIG. 7 shows the section according to FIG. 6 in a two-dimensional view
  • FIG. 8 shows a sectional representation of a room heater according to the invention with a combination of further preferred configurations.
  • FIG. 1 shows a three-dimensional representation of an exemplary embodiment of a temperature control device according to the invention, also known as an air conditioning device, which is specifically designed as a space heater—hereinafter referred to as heater 1 .
  • This has a multi-part housing 2 to which an electronics housing 4 is attached and in which an irradiation unit 6, a heating unit 8 and a fan unit 10 (the latter not visible in FIG. 1) are accommodated.
  • the fan unit 10 is designed in such a way that the air flow to be heated is sucked in in the direction of flow 11 and then comes into operative connection first with the irradiation unit 6 and then with the heating unit 8 . Accordingly, the air flow is only heated after the irradiation by means of the irradiation unit 6.
  • the electronics housing 4 protrudes from the housing 2 in the radial direction and accommodates all electrical/electronic components for the power supply and signal processing of the units 6, 8, 10 described above. There are in the illustration according to Figure 1, two electrical connections 12, 14 of the electronics housing 4 visible.
  • the housing 2 is approximately tubular in the broadest sense and is composed of several housing parts, which will be discussed in more detail below.
  • the irradiation unit 6 has a tubular housing part 16, along the inner circumference of which are arranged a large number of UV-C emitters, which in the exemplary embodiment shown are designed as UV-C LEDs 18, whose radiation is directed towards the housing via a lens system 20 2 through-flowing airflow (see arrow) is focused, so that all volume fractions of the airflow are exposed to the radiation.
  • a tubular housing part 16 along the inner circumference of which are arranged a large number of UV-C emitters, which in the exemplary embodiment shown are designed as UV-C LEDs 18, whose radiation is directed towards the housing via a lens system 20 2 through-flowing airflow (see arrow) is focused, so that all volume fractions of the airflow are exposed to the radiation.
  • the lens systems 20 can also have an optically scattering effect instead of the optically focusing effect, or they can be omitted entirely.
  • Electrical connection lines 22 of the LEDs 18 are also indicated in the representation according to FIG.
  • a total of 12 LEDs 18 are distributed around the circumference of the housing part 16 .
  • this number can vary depending on the requirement.
  • the housing part 16 is attached to a heating housing 24 which also carries the electronics housing 4 .
  • the actual heating unit 8 is accommodated in this heating housing 24, which in the exemplary embodiment shown is designed with a heating register 26, as is described, for example, in EP 0 350 528 B1 of the applicant.
  • a heating register 26 has, for example, a multiplicity of PTC resistance heating elements 28, the heat of which is applied to the PTC resistance heating elements 28 in each case Corrugated fins 30 or other heat exchange surfaces (radiators) to which the air flowing through the heater 1 is released in order to heat it.
  • the heating register 26 can have a multi-stage design, so that depending on the air flow to be heated, several heating stages can be switched on in order to bring the air flow to the desired temperature.
  • a hollow guide flange 34 is provided on the outer circumference of the heating housing 24 , which partially encompasses the heating housing 24 and opens into the electronics housing 4 . Signal or power supply lines can be routed in this hollow guide flange 34 .
  • the air flow which has been heated and freed of germs, in particular viruses, then exits at the rear via the fan unit 10 from a fan housing 32 attached to the heating housing 24 .
  • the LEDs 18 and the heating register 26 are controlled via the control electronics accommodated in the electronics housing 4 .
  • Figure 2 shows a three-dimensional rear view of the heater 1 according to Figure 1 looking in the direction of the fan unit 10.
  • this is designed as an axial fan with a schematically indicated fan wheel 35, via which the air to be rid of germs and to be heated through the housing part 16 of the Irradiation unit 6 is sucked through.
  • FIG. 2 also shows the downstream end section of the heating register 26 with the corrugated fins 30 and the PTC resistance heating elements 28. Further details of the heating device 1 according to the invention are explained with reference to the following figures.
  • FIG. 3 shows a side view of the heating device 1 with the approximately tubular housing 2 accommodating the irradiation unit 6 , the heating unit 8 and the fan unit 10 .
  • a total of 12 LEDs 18 distributed around the circumference are arranged, which are connected via the electrical connection lines 22 to the control electronics accommodated in the electronics housing 4 .
  • the LEDs 18 can be distributed radially around the circumference; of course, another distribution is also possible, for example, axially, offset, or arranged spatially in some other way. Likewise, the LEDs 18 can also protrude to different extents into the air flow.
  • the heating housing 24 is composed of two parts, a housing part 24a and a housing part 24b. In principle, however, the heating housing 24 can also be designed in one piece. In this exemplary embodiment, the guide flange 34 is thus formed by the two heating housing parts 24a, 24b.
  • FIG. 4 shows a front view of the heater 1 according to FIG. 1 looking in the direction of the irradiation unit 6.
  • the twelve LEDs 18 distributed around the circumference of the housing part 16 can clearly be seen, the UV-C radiation of which is provided with the reference numeral 36 in FIG .
  • this UV-C radiation 36 can be focused via the lens system 20 of the LEDs 18 .
  • This beam guidance and the power of the LEDs 18 are designed in such a way that, with the desired volume flow, the DNA of the germs contained in the air flow is significantly reduced by the irradiation, preferably completely destroyed.
  • the irradiation takes place on the “cold” side of the heating device 1. This relative position prevents the LEDs 18 from aging due to excessive heat application, since the LEDs 18 are cooled by the air flow.
  • LEDs with a power of 0.1 to 0.2 W can be used. Of course, other services are also possible.
  • the heating unit 8 is arranged downstream of the LEDs 18 .
  • FIG. 4 shows the corrugated ribs 30 of the heating register 26 with the PTC resistance heating elements 28 arranged between the corrugated ribs 30, which can be covered by a casting compound or the like towards the viewer.
  • the PTC resistance heating elements 28 are contacted via contact plates, two of which are provided with the reference numerals 38, 40 by way of example.
  • FIG. 5 shows a section along the section line AA in FIG. 4. This is a longitudinal section, so that the interior of the electronics housing 4 is visible.
  • the electronics housing 4 is designed with a cover 42 which can be removed in order to gain access to the control electronics.
  • this control electronics has a control circuit board 44 with the semiconductor components that are required for controlling the components of the heating device 1 .
  • the electrical connection 14 which is arranged on the side of the electronics housing 4 , is also visible in this sectional view.
  • the fan unit 10 shown on the left in the sectional view according to FIG. The latter is mounted in the housing part 16 of the fan unit 10 via an indicated bracket 50 .
  • the fan unit 10 is designed in such a way that it draws in the air flow to be treated via the irradiation unit 6, so that the flow takes place from right to left in the representation according to FIG.
  • the heating unit 8 is arranged with the heating register 26, which is only indicated.
  • the guide flange 34 designed as a hollow chamber can be clearly seen, in the chamber 52 of which, for example, signal and power supply cables and other elements of the heating device 1 can be routed.
  • the germs carried along by the air flow are exposed to UV-C radiation 36 via the LEDs 18 and their lens system 20, so that the DNA of these germs (viruses, bacteria, fungi, etc.) is significantly reduced, preferably completely destroyed .
  • the cold air flow cleaned in this way is then brought to the desired temperature via the heating register 26 of the heating unit 8 and is then heated and “sterilized” through the fan wheel 35 and the outlet cross section of the housing part 16 from the heating device 1.
  • Figure 6 shows a three-dimensional representation of the heater 1 in a
  • This heating register 26 is attached to the heating housing 24 of the heating unit 8 by means of suitable fixing elements 56 .
  • suitable fixing elements 56 can also be arranged one behind the other in the direction of flow in order to increase or vary the heat output.
  • FIG. 7 shows the two-dimensional sectional representation corresponding to FIG. 6 with the irradiation unit 6 and the LEDs 18 held thereon for emitting UV-C radiation 36 to an air flow to be sterilized and heated.
  • the heating unit 8 with the heating register 26 is arranged downstream of the irradiation unit 6 .
  • the latter has a multiplicity of corrugated ribs 30 which are arranged between PTC resistance elements 28 which in turn are contacted via contact plates 38, 40 and intermediate plates 54. These metal sheets 37, 40, 54 can also be used to hold the corrugated fins 30.
  • the heating register 26 is fastened via the fixing elements 56 on the inner peripheral wall of the multi-part heating housing 24.
  • the fan unit 10 is designed with the fan wheel 35, which is driven via the drive shaft 46 and the fan motor 48, the control of the fan motor 48 in turn taking place via the control electronics.
  • the fan unit 10 is arranged downstream of the irradiation unit 6 and the heating unit 8 .
  • the fan unit can also be positioned upstream of these units or between these units.
  • FIG. 8 shows a sectional illustration of a space heater according to the invention with a combination of further preferred configurations.
  • an LED 18 is symbolized by an arrow, which is positioned at 45° to the flow direction 11 of the air.
  • a large number of LEDs 18 are preferably again distributed uniformly on the circumference of the housing part 16 of the irradiation unit 106 .
  • a reflector 120 Adjacent to the LEDs 18 of the irradiation unit 106, a reflector 120 is arranged inside the housing part 16, which can be a tubular insert part or a coating. A light beam 122 shown by way of example from an LED 18 is reflected and is used for further germ reduction by splitting the DNA of viruses, bacteria, fungi or other harmful microorganisms carried along with the air flow.
  • LEDs 18 of an irradiation unit 206 are also shown in FIG. Such LEDs 18 can be attached to the contact plates 38, 40 and/or intermediate plates 54 of the heating register 26.
  • the direction of flow 111 of the air can also be directed counter to the direction of flow 11 of the first exemplary embodiment (from right to left in FIG. 8).
  • the basic structural principle of the space heater can be unchanged compared to the previous exemplary embodiments.
  • Flow direction 11; 111 be reversed.
  • LEDs 18 instead of the LEDs 18, other radiation sources, for example mercury vapor lamps or the like, can of course also be used.
  • other germ reduction devices can also be used to remove the germs from the air flow.
  • the HEPA filters mentioned in the introduction to the description can be used to separate the germs from the air flow.
  • a combination of filters and irradiation units is also entirely conceivable.
  • a unit can also be used to cool the air flow.
  • the unit can also be designed with a combination of a heating unit and a cooling unit.
  • the cooling unit can be designed as an electrical cooling unit, for example with Peltier elements.
  • a room temperature control device with a heating and/or cooling unit, a fan and a germ reduction device is disclosed.

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Apparatus For Disinfection Or Sterilisation (AREA)
  • Disinfection, Sterilisation Or Deodorisation Of Air (AREA)

Abstract

L'invention concerne un dispositif de régulation de température de pièce comprenant une unité de chauffage et/ou de refroidissement et un dispositif de réduction de germes.
EP21838997.1A 2020-12-11 2021-12-07 Dispositif de régulation de température Pending EP4259981A1 (fr)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
DE102020133086 2020-12-11
DE102021106028.1A DE102021106028A1 (de) 2020-12-11 2021-03-12 Temperiergerät
PCT/EP2021/084573 WO2022122723A1 (fr) 2020-12-11 2021-12-07 Dispositif de régulation de température

Publications (1)

Publication Number Publication Date
EP4259981A1 true EP4259981A1 (fr) 2023-10-18

Family

ID=79269578

Family Applications (1)

Application Number Title Priority Date Filing Date
EP21838997.1A Pending EP4259981A1 (fr) 2020-12-11 2021-12-07 Dispositif de régulation de température

Country Status (2)

Country Link
EP (1) EP4259981A1 (fr)
WO (1) WO2022122723A1 (fr)

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
EP0350528B1 (fr) 1988-07-15 1992-04-01 David & Baader DBK Spezialfabrik elektrischer Apparate und Heizwiderstände GmbH Radiateur
KR100546665B1 (ko) * 2003-08-22 2006-01-26 엘지전자 주식회사 공기 청정기
KR100826320B1 (ko) 2007-05-17 2008-05-06 미래디지털(주) 제습 및 공기정화 장치
DE202012100630U1 (de) 2012-02-24 2013-05-27 Imtech Deutschland Gmbh & Co. Kg Reinlufteinrichtung für den mikroelektronischen und optischen Bereich
DE102013211579A1 (de) * 2013-06-19 2014-12-24 Behr Gmbh & Co. Kg Wärmetauschereinrichtung und Heizvorrichtung
CA2946116A1 (fr) 2014-04-17 2015-10-22 Clean Air For The People Inc. Systemes de traitement d'air pour enceintes de transport et procedes associes
KR102335503B1 (ko) 2016-08-12 2021-12-07 한온시스템 주식회사 촉매 장치 및 이를 포함하는 차량용 공조장치
US10264931B2 (en) 2016-09-23 2019-04-23 The Boeing Company Hand drying systems and methods
JP2019038273A (ja) 2017-08-22 2019-03-14 レイコップ・コリア株式会社 冷暖房送風装置
DE202018001847U1 (de) 2018-04-12 2019-07-17 PURION GmbH UV-Luftbehandlungsvorrichtung
CN209726393U (zh) * 2019-04-15 2019-12-03 河南蓝色之家环保技术有限公司 一种壁挂式空气加湿消毒机

Also Published As

Publication number Publication date
WO2022122723A1 (fr) 2022-06-16

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