CN111425021A - Ventilation and disinfection device for infectious disease isolation ward - Google Patents
Ventilation and disinfection device for infectious disease isolation ward Download PDFInfo
- Publication number
- CN111425021A CN111425021A CN202010218011.2A CN202010218011A CN111425021A CN 111425021 A CN111425021 A CN 111425021A CN 202010218011 A CN202010218011 A CN 202010218011A CN 111425021 A CN111425021 A CN 111425021A
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- disinfection
- infectious disease
- isolation ward
- ventilation
- disease isolation
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- 238000004659 sterilization and disinfection Methods 0.000 title claims abstract description 126
- 238000009423 ventilation Methods 0.000 title claims abstract description 31
- 238000002955 isolation Methods 0.000 title claims abstract description 28
- 208000015181 infectious disease Diseases 0.000 title claims abstract description 18
- 208000035473 Communicable disease Diseases 0.000 title claims abstract description 17
- 239000000428 dust Substances 0.000 claims abstract description 18
- 230000001954 sterilising effect Effects 0.000 claims description 15
- 239000000919 ceramic Substances 0.000 claims description 6
- 229920000742 Cotton Polymers 0.000 claims description 3
- -1 iron-chromium-aluminum Chemical group 0.000 claims description 3
- 238000009413 insulation Methods 0.000 claims description 2
- 238000007872 degassing Methods 0.000 claims 1
- 241000894006 Bacteria Species 0.000 description 3
- 241000700605 Viruses Species 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 230000004075 alteration Effects 0.000 description 1
- 230000001580 bacterial effect Effects 0.000 description 1
- 230000000249 desinfective effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000002458 infectious effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000011900 installation process Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000005855 radiation Effects 0.000 description 1
- 238000007789 sealing Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E04—BUILDING
- E04H—BUILDINGS OR LIKE STRUCTURES FOR PARTICULAR PURPOSES; SWIMMING OR SPLASH BATHS OR POOLS; MASTS; FENCING; TENTS OR CANOPIES, IN GENERAL
- E04H3/00—Buildings or groups of buildings for public or similar purposes; Institutions, e.g. infirmaries or prisons
- E04H3/08—Hospitals, infirmaries, or the like; Schools; Prisons
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L9/00—Disinfection, sterilisation or deodorisation of air
- A61L9/16—Disinfection, sterilisation or deodorisation of air using physical phenomena
- A61L9/18—Radiation
- A61L9/20—Ultraviolet radiation
-
- A—HUMAN NECESSITIES
- A61—MEDICAL OR VETERINARY SCIENCE; HYGIENE
- A61L—METHODS OR APPARATUS FOR STERILISING MATERIALS OR OBJECTS IN GENERAL; DISINFECTION, STERILISATION OR DEODORISATION OF AIR; CHEMICAL ASPECTS OF BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES; MATERIALS FOR BANDAGES, DRESSINGS, ABSORBENT PADS OR SURGICAL ARTICLES
- A61L2209/00—Aspects relating to disinfection, sterilisation or deodorisation of air
- A61L2209/10—Apparatus features
- A61L2209/14—Filtering means
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- Health & Medical Sciences (AREA)
- Public Health (AREA)
- Architecture (AREA)
- Engineering & Computer Science (AREA)
- Veterinary Medicine (AREA)
- General Health & Medical Sciences (AREA)
- Animal Behavior & Ethology (AREA)
- Life Sciences & Earth Sciences (AREA)
- Epidemiology (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Apparatus For Disinfection Or Sterilisation (AREA)
- Disinfection, Sterilisation Or Deodorisation Of Air (AREA)
Abstract
The invention discloses a ventilation and disinfection device for an infectious disease isolation ward, which comprises a dust cover and a ventilating duct, wherein the dust cover is arranged at the left end of the ventilating duct, a disinfection light source, a disinfection cavity and a negative pressure fan are sequentially arranged in the ventilating duct from left to right, the temperature in the disinfection cavity is 230-235 ℃, a controller is arranged on the inner wall of the ventilating duct between the disinfection cavity and the ventilating duct, the controller is respectively and electrically connected with the disinfection light source and the negative pressure fan, and the controller is electrically connected with an external power supply.
Description
Technical Field
The invention relates to the technical field of ventilating devices for infectious disease isolation wards, and particularly belongs to a ventilating and disinfecting device for the infectious disease isolation wards.
Background
The isolation ward is a place for effectively isolating the contact between the infectious patient and the outside, and because a large amount of viruses and bacteria exist in the air in the isolation ward, the isolation ward is generally a closed space, but the air quality in the isolation ward is poor due to long-term closure, the rehabilitation and treatment of the patient are influenced, and the isolation ward needs to be ventilated. The existing ventilation device mainly adopts the air exhaust mode, and adopts an external disinfection facility to disinfect the gas exhausted from the isolation ward, so that the disinfection facility is large in size, complex in installation process, high in noise and required to be maintained frequently. Therefore, there is a need for a device that is easy to install and use, does not require frequent maintenance, can effectively disinfect the gas exhausted from the isolation ward, and does not affect the rest of the patient in the isolation ward.
Disclosure of Invention
The invention aims to provide a ventilation and disinfection device for an infectious disease isolation ward, which is convenient to install and use and can effectively disinfect gas exhausted from the isolation ward.
In order to solve the problems, the technical scheme adopted by the invention is as follows:
a ventilation and disinfection device for an infectious disease isolation ward comprises a dust cover and a ventilating duct, wherein the ventilating duct comprises a first disinfection area and a second disinfection area, the first disinfection area is positioned on the left side of the second disinfection area, the dust cover is arranged at the left end of the first disinfection area of the ventilating duct, a disinfection light source, a disinfection cavity and a negative pressure fan are sequentially arranged in the ventilating duct from left to right, the temperature in the disinfection cavity is 230 ℃ and 235 ℃, an air inlet is arranged on the left side of the disinfection cavity and is in sealed connection with the first disinfection area and the disinfection cavity, the disinfection light source is positioned in the first disinfection area, the disinfection cavity is positioned in the second disinfection area, the negative pressure fan is arranged in the ventilating duct on the right side of the second disinfection area, a controller is arranged on the inner wall of the ventilating duct between the disinfection cavity and the ventilating duct, and the controller is respectively and electrically connected with the disinfection light source and the negative pressure fan, the controller is electrically connected with an external power supply.
Further, the left side of first disinfection district be equipped with the air intake, disinfection light source install in the air intake, the air intake be loudspeaker column structure, the left side opening of air intake be less than the right side opening.
Furthermore, a plurality of air guide fin plates are arranged on the inner surface of the air inlet, a fixing plate is fixedly installed on each air guide fin plate through a connecting plate, and the disinfection light source is installed on the right side face of the fixing plate.
Further, the disinfection light source is a deep ultraviolet ray sterilization L ED lamp.
Further, the air inlet be horn structure, air inlet right side opening be less than the left side opening, air inlet right side opening be connected with the disinfection chamber.
Further, the disinfection cavity is internally provided with a plurality of disinfection plates from left to right, a thermometer is arranged in a space between the two middle disinfection plates, and the disinfection plates and the thermometer are respectively electrically connected with the controller.
Furthermore, the disinfection plate is composed of a resistance net and a ceramic frame, the resistance net is installed in the ceramic frame, and the resistance net is an iron-chromium-aluminum resistance net.
Furthermore, the right end of the disinfection cavity is provided with an air outlet cover, and the air outlet cover is provided with a plurality of air outlet holes.
Further, the disinfection cavity is of a cylindrical structure, and heat insulation cotton is filled in the space between the disinfection cavity and the air inlet and between the ventilation duct and the air inlet.
Furthermore, the wall of the ventilating duct on the right side of the negative pressure fan is also provided with a plurality of through holes.
Compared with the prior art, the invention has the following implementation effects:
1. the device is provided with the dust cover which can filter the airflow entering the device, thereby preventing moths, sundries and part of dust from entering the device and preventing the device from being blocked;
2. the device is internally provided with a first disinfection area and a second disinfection area, and can disinfect the airflow entering the device twice, so that the virus and bacteria in the airflow are thoroughly killed;
3. the air inlet of the device is in a horn shape, and the air guide fin plate is arranged in the device and has the function of dividing and guiding air flow entering the device, so that the device has no obvious wind noise during operation; the wall of the ventilating duct on the right side of the negative pressure fan is also provided with a plurality of through holes, so that airflow is further reduced when being discharged from the ventilating duct, and the noise of the device is smaller when the device operates;
4. the plurality of through holes are formed in the wall of the ventilating duct on the right side of the negative pressure fan, so that air flow can be mixed with external air flow in the ventilating duct before being discharged from the ventilating duct, the temperature of the air flow discharged from the right side of the ventilating duct is reduced, and scalding accidents are avoided;
5. the device has an autonomous control function through the controller, when the temperature in the disinfection cavity does not reach 230 ℃, the negative pressure fan of the device cannot run, the airflow in the isolation ward cannot be drawn out, and the disinfection light source can effectively disinfect the airflow entering the air inlet;
6. the disinfection light source emits light to the right, so that the ultraviolet rays emitted by the disinfection light source are back to the dust cover, the ultraviolet light source is prevented from directly emitting out of the device to cause harm to personnel outside the device,
7. the disinfection cavity is internally provided with a plurality of disinfection plates, so that the airflow passing through the disinfection cavity is forced to pass through the meshes of the resistance net, the effective contact temperature of the virus and the bacteria in the airflow is 230-235 ℃, and the effect of thorough disinfection is achieved.
Drawings
Fig. 1 is a front view of the structure of the present invention.
Fig. 2 is a left side view of the present invention.
Fig. 3 is a schematic view of the internal structure of the present invention.
Fig. 4 is a schematic view of the structure of the sterilizing plate.
Fig. 5 is a sectional view a-a in fig. 3.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation to be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; may be directly connected or indirectly connected through an intermediate. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1 to 3, the ventilation device for an isolation ward of the present invention comprises a dust cover 2 and a funnel 1, wherein the dust cover 2 is installed at the left end of the funnel 1, the dust cover 2 adopts the existing dust hole as a honeycomb-shaped dust cover 2, the dust cover 2 can prevent moths, sundries and partial dust from entering the funnel 1, and in addition, a wiring cavity 11 is arranged on the outer wall of the funnel 1, which is convenient for the electrical connection between the devices in the funnel 1.
As shown in fig. 3, the ventilator 1 comprises a first disinfection area 3 and a second disinfection area 4, wherein the first disinfection area 3 is located at the left side of the second disinfection area 4, the dust cover 2 is installed at the left end of the first disinfection area 3 of the ventilator 1, a disinfection light source 5, a disinfection cavity 6 and a negative pressure fan 7 are sequentially installed in the ventilator 1 from left to right, and the air output of the negative pressure fan is 10m3The sterilization light source 5 is a deep ultraviolet sterilization L ED lamp, and the radiation illumination value is 160uW/cm3The disinfection light source 5 is positioned in the first disinfection area 3, the disinfection cavity 6 is positioned in the second disinfection area 4, and the negative pressure air isThe machine 7 is mounted in the funnel 1 on the right side of the second sterilization zone 4.
The left side of disinfection chamber 6 is equipped with air inlet 54, and air inlet 54 and first disinfection district 3 and disinfection chamber 6 sealing connection, and air inlet 54 is loudspeaker column structure, and air inlet 54 right side opening is less than the left side opening, and disinfection chamber 6 is the cylinder structure, and the space intussuseption between disinfection chamber 6 and draft tube 1 and the air inlet 54 is filled with thermal-insulated cotton 63, is equipped with at least 6 each other contactless sterilizing board 61 from a left side to the right side in disinfection chamber 6. As shown in fig. 4, the disinfection plate 61 is composed of a resistance net 612 and a ceramic frame 611, the resistance net 612 is installed in the ceramic frame 611, the resistance net 612 is an iron-chromium-aluminum resistance net, and the mesh number of the resistance net 612 is 10. A thermometer 62 is arranged in the space between the two middle disinfection plates 61 in the disinfection chamber 6, an air outlet cover is arranged at the right end of the disinfection chamber 6, and a plurality of air outlet holes 64 are arranged on the air outlet cover.
In order to reduce the wind noise of the ventilation device during operation, an air inlet 50 is arranged on the left side of the first disinfection area 3, as shown in fig. 5, the air inlet 50 is of a horn-shaped structure, the left opening of the air inlet 50 is smaller than the right opening, the disinfection light source 5 is installed in the air inlet 50, a plurality of air guide fins 51 are arranged on the inner surface of the air inlet 50, a fixing plate 53 is fixedly installed on the air guide fins 51 through a connecting plate 52, the disinfection light source 5 is installed on the right side surface of the fixing plate 53, when the ventilation device operates, the disinfection light source 5 emits light to the right, ultraviolet rays emitted by the disinfection light source 5 are enabled to face away from the dust cover 2, damage to personnel outside the ventilation device caused by the ultraviolet light source directly emitting out of the ventilation device is avoided, the air guide fins 51 on the air inlet 50 have the function of dividing and guiding the air flow entering the ventilation device, a sound level meter of Sonus GA 116/GA 116L/GA 216L is used for measuring the noise of the ventilation device before and after the ventilation device operates, 56 decibels before the installation of.
In addition, in order to reduce the temperature of the air flow discharged from the right side ventilation duct 1 of the negative pressure fan 7, as shown in fig. 1, a plurality of through holes 12 are further formed in the wall of the right side ventilation duct 1 of the negative pressure fan 7, so that the air flow can be mixed with the outside air flow in the ventilation duct 1 before being discharged from the ventilation duct 1, the temperature of the air flow discharged from the right side of the ventilation duct 1 is reduced, and scalding accidents are avoided.
The controller 8 is installed on the inner wall of the ventilating duct 1 between the sterilizing cavity 6 and the ventilating duct 1, the controller 8 is respectively electrically connected with the sterilizing light source 5, the negative pressure fan 7, the sterilizing plate 61 and the thermometer 62 through a lead 9, the controller 8 is electrically connected with an external power supply, the lead between the controller 8 and the negative pressure fan 7 is installed in the wiring cavity 11, and the controller 8 can automatically control the work of the negative pressure fan 7, the sterilizing plate 61 and the sterilizing light source 5 according to the temperature change of the thermometer 62. When the temperature of the thermometer 62 is lower than 230 ℃, the controller 8 supplies power to the disinfection plate 61 and the disinfection light source 5, so that the disinfection light source 5 is lightened, the disinfection plate 61 starts to be heated, when the temperature of the thermometer 62 is higher than 235 ℃, the controller 8 powers on the negative pressure fan 7, so that the negative pressure fan 7 starts to perform air draft operation, the air flow enters the first disinfection area 3 and is disinfected and disinfected by the disinfection light source 5, then the air flow enters the disinfection cavity 6 in the second disinfection area 4 and is heated, and passes through the disinfection plate 61 with the temperature of 230-.
The number of colonies using the device was 3000CFU/cm3The sterilization of the gas is carried out, firstly, the resistance network is closed, the negative pressure fan and the sterilization light source are opened, and the colony count of the gas exhausted from the device is 570CFU/cm calculated according to the GB 15982 + 2012 hospital sterilization sanitary standard3(ii) a Then the resistance network is opened, the temperature of the resistance network is raised to 230 ℃, and the colony count is 3000CFU/cm3The bacterial colony count of the gas discharged from the device is 2CFU/cm calculated according to GB 15982-3。
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (10)
1. The utility model provides an infectious disease isolation ward ventilation degassing unit, includes dust cover and draft tube, its characterized in that: the ventilator comprises a first disinfection area and a second disinfection area, wherein the first disinfection area is located on the left side of the second disinfection area, the dust cover is installed at the left end of the first disinfection area of the ventilator, a disinfection light source, a disinfection cavity and a negative pressure fan are sequentially installed in the ventilator from left to right, the temperature in the disinfection cavity is 230-.
2. An infectious disease isolation ward ventilation and disinfection device as claimed in claim 1, wherein: the left side of first disinfection district be equipped with the air intake, disinfection light source install in the air intake, the air intake be loudspeaker column structure, the left side opening of air intake be less than the right side opening.
3. An infectious disease isolation ward ventilation and disinfection device as claimed in claim 2, wherein: the air inlet is provided with a plurality of air guide fin plates on the inner surface, the air guide fin plates are fixedly provided with fixing plates through connecting plates, and the disinfection light source is arranged on the right side face of each fixing plate.
4. An infectious disease isolation ward ventilation and disinfection device as claimed in any one of claims 1-3, wherein said disinfection light source is a deep ultraviolet ray sterilization L ED lamp.
5. An infectious disease isolation ward ventilation and disinfection device as claimed in claim 1, wherein: the air inlet be loudspeaker column structure, air inlet right side opening be less than the left side opening, air inlet right side opening be connected with the disinfection chamber.
6. An infectious disease isolation ward ventilation and disinfection device as claimed in claim 1, wherein: the disinfection cavity is internally provided with a plurality of disinfection plates from left to right, a thermometer is arranged in a space between the two middle disinfection plates, and the disinfection plates and the thermometer are respectively electrically connected with the controller.
7. An infectious disease isolation ward ventilation and disinfection device as claimed in claim 6, wherein: the disinfection plate is composed of a resistance net and a ceramic frame, the resistance net is arranged in the ceramic frame, and the resistance net is an iron-chromium-aluminum resistance net.
8. An infectious disease isolation ward ventilation and disinfection apparatus as claimed in claim 1 or 6, wherein: the right end of the disinfection cavity is provided with an air outlet cover, and the air outlet cover is provided with a plurality of air outlet holes.
9. An infectious disease isolation ward ventilation and disinfection device as claimed in claim 1, wherein: the disinfection cavity is of a cylindrical structure, and heat insulation cotton is filled in the space between the disinfection cavity and the air inlet and between the ventilation barrel.
10. An infectious disease isolation ward ventilation and disinfection device as claimed in claim 1, wherein: the wall of the ventilating duct on the right side of the negative pressure fan is also provided with a plurality of through holes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218011.2A CN111425021A (en) | 2020-03-25 | 2020-03-25 | Ventilation and disinfection device for infectious disease isolation ward |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010218011.2A CN111425021A (en) | 2020-03-25 | 2020-03-25 | Ventilation and disinfection device for infectious disease isolation ward |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN111425021A true CN111425021A (en) | 2020-07-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010218011.2A Pending CN111425021A (en) | 2020-03-25 | 2020-03-25 | Ventilation and disinfection device for infectious disease isolation ward |
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| CN (1) | CN111425021A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113819565A (en) * | 2021-09-18 | 2021-12-21 | 上海轨道交通检测认证(集团)有限公司 | Rail transit system of killing that disappears |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201203234Y (en) * | 2008-04-27 | 2009-03-04 | 张光海 | Inner air exhausting apparatus of communicable disease ward |
| CN204219462U (en) * | 2014-11-21 | 2015-03-25 | 重庆师范大学 | Air disinfection device |
| CN104940976A (en) * | 2015-07-16 | 2015-09-30 | 罗积鹏 | Automatic sterilization poison removal equipment and using method |
| RU171582U1 (en) * | 2016-04-15 | 2017-06-06 | Общество с ограниченной ответственностью научно-производственное объединение "АЛЕВИТ" | VENTILATED AIR RECirculator |
| CN108050609A (en) * | 2018-01-30 | 2018-05-18 | 马鞍山市润启新材料科技有限公司 | A kind of air cleaning unit |
| CN207520382U (en) * | 2017-03-06 | 2018-06-22 | 广东昊翔电气设备工程有限公司 | A kind of efficient medical air disinfecting and purifying device |
-
2020
- 2020-03-25 CN CN202010218011.2A patent/CN111425021A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN201203234Y (en) * | 2008-04-27 | 2009-03-04 | 张光海 | Inner air exhausting apparatus of communicable disease ward |
| CN204219462U (en) * | 2014-11-21 | 2015-03-25 | 重庆师范大学 | Air disinfection device |
| CN104940976A (en) * | 2015-07-16 | 2015-09-30 | 罗积鹏 | Automatic sterilization poison removal equipment and using method |
| RU171582U1 (en) * | 2016-04-15 | 2017-06-06 | Общество с ограниченной ответственностью научно-производственное объединение "АЛЕВИТ" | VENTILATED AIR RECirculator |
| CN207520382U (en) * | 2017-03-06 | 2018-06-22 | 广东昊翔电气设备工程有限公司 | A kind of efficient medical air disinfecting and purifying device |
| CN108050609A (en) * | 2018-01-30 | 2018-05-18 | 马鞍山市润启新材料科技有限公司 | A kind of air cleaning unit |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113819565A (en) * | 2021-09-18 | 2021-12-21 | 上海轨道交通检测认证(集团)有限公司 | Rail transit system of killing that disappears |
| CN113819565B (en) * | 2021-09-18 | 2022-09-20 | 上海轨道交通检测认证(集团)有限公司 | Rail transit system of killing that disappears |
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Application publication date: 20200717 |
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