CN212006115U - Fresh air system - Google Patents

Fresh air system Download PDF

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Publication number
CN212006115U
CN212006115U CN201921829843.7U CN201921829843U CN212006115U CN 212006115 U CN212006115 U CN 212006115U CN 201921829843 U CN201921829843 U CN 201921829843U CN 212006115 U CN212006115 U CN 212006115U
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CN
China
Prior art keywords
dust
fresh air
filter screen
seat
passageway
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.)
Expired - Fee Related
Application number
CN201921829843.7U
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Chinese (zh)
Inventor
张朝伟
项光星
邹晓巍
周玉君
陈泽锋
余贤沛
周慧杰
孙铿锵
黄学成
林健
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.)
Zhejiang Chuangli Electronics Co Ltd
Original Assignee
Zhejiang Chuangli Electronics Co 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 Zhejiang Chuangli Electronics Co Ltd filed Critical Zhejiang Chuangli Electronics Co Ltd
Priority to CN201921829843.7U priority Critical patent/CN212006115U/en
Application granted granted Critical
Publication of CN212006115U publication Critical patent/CN212006115U/en
Expired - Fee Related legal-status Critical Current
Anticipated expiration legal-status Critical

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Abstract

The utility model discloses a new trend system, including the new trend passageway, humidification device and self-cleaning device, install filter screen and fly net in the new trend passageway, the new trend passageway has the air intake, the air outlet, the fly net is installed in one side of the windward side of filter screen in the passageway, humidification device sprays high-pressure atomized water to the filter screen, self-cleaning device includes the dust removal passageway, dust exhausting fan, the pivoted installs the rotary type dust absorption seat in the dust removal passageway, rotary type dust exhaust seat, rotary type dust absorption seat forms the dust absorption chamber, rotary type dust exhaust seat forms the dust absorption chamber, rotary type dust absorption seat sets up the dust absorption mouth, rotary type dust exhaust seat sets up the dust exhaust mouth, the dust exhaust mouth passes through dust removal passageway and dust absorption mouth intercommunication. Fresh air system removes, and the inlayer filter screen is crossed water back dust and is walked by the hosepipe to by the powerful suction of dust absorption mouth, by outer fly net department blowout, in the same direction as the area and spray and wash outer filter screen, can effectively clear away outer fly net dust and harden wait the extreme condition, dust removal effect is better, and the structure is simplified more, and control is convenient.

Description

Fresh air system
Technical Field
The utility model belongs to the technical field of the computer lab new trend technique and specifically relates to indicate a new trend system.
Background
The research and development of the 5G technology is very hot all over the world at present, and the mainstream standardization organizations at home and abroad recognize the urgency of the development of the 5G technology at the present stage and make related 5G research and development plans. From 4G to 5G, user requirements are continuously improved, indoor and outdoor data services are greatly expanded, carrier frequency is greatly improved, the traditional macro base station is increasingly unable to cope with the indoor and outdoor data services, and in the future 5G era, a small base station inevitably becomes a mainstream on a large scale. Among the 5G key technologies, there is a technology called high-density networking, and the development purpose of the technology is to prepare for the wide-range deployment of the small base station in the future 5G era, so that the coming of the 5G era can really drive the explosive deployment of the small base station.
The fresh air equipment is used for replacing fresh air for the closed space, and is commonly applied to household rooms, public places, factories or data rooms (such as 5G base stations) and the like. The fresh air equipment needs to have the functions of refreshing outdoor air to indoor and filtering and purifying outdoor air. The communication base station has small internal area, large unit heating value and more area of 30-40 square meters. At present, the base station can be provided with a fresh air system, so that equipment in a machine room can operate in a normal temperature range, and the common fresh air system applied to the base station mainly comprises a fan, a filter and other components. The filter needs to be replaced after being applied for a period of time, and needs to be maintained and cleaned regularly by personnel. Most base stations are built in remote areas, the conditions are severe, and mobile stations are widely distributed, so that the base stations are maintained unchanged. In order to solve the above problems, the prior art has appeared a fresh air system with a self-cleaning mechanism, and the common structure is as follows: the dust collection fan is connected with a hose, and the hose sucks dust and the like accumulated on the filter (a filter screen) into the dust collection fan and then discharges the dust through another hose. However, the main disadvantages of such cleaning mechanisms are: in the dust removal process, the hose continuously reciprocates on the net surface of the filter screen, and the connection part of the hose and the dust collection fan is easy to damage after the hose is used for a certain time; in addition, in the process that the hose reciprocates along with the dust collection fan, the problems that the dust collection efficiency is reduced and even dust cannot be collected due to poor contact with the filter screen are easily caused by the problems of pipeline aging, deformation and the like. Therefore, the design of the self-cleaning mechanism of the existing fresh air system is not ideal.
SUMMERY OF THE UTILITY MODEL
In order to solve the technical problem, the utility model provides a new trend system with self-cleaning function is in order to solve prior art's a great deal of problem.
In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:
a fresh air system comprises a fresh air channel, a humidifying device and a self-cleaning device arranged in the fresh air channel, wherein a filter screen and an insect net are arranged in the fresh air channel, the fresh air channel is provided with an air inlet and an air outlet, one side of the filter screen facing the air inlet is a windward side, the insect net is arranged on one side of the windward side of the filter screen in the channel, the self-cleaning device is arranged between the filter screen and the insect net, the humidifying device is used for spraying high-pressure atomized water to the filter screen and/or the insect net, the self-cleaning device comprises a dust removal channel, a dust removal fan arranged in the dust removal channel, a rotary dust collection seat arranged in the dust removal channel in a rotating manner, and a rotary dust removal seat arranged in the dust removal channel in a rotating manner, the rotary dust collection seat forms a dust collection cavity in a hollow manner, the rotary dust collection cavity is formed in the rotary dust removal seat, and the rotary dust collection seat face, the dust absorption mouth all communicates with dust absorption chamber, dust removal passageway, the rotary type dust exhaust seat is in the face of one side of fly net sets up the dust exhaust mouth, the dust exhaust mouth passes through dust removal passageway and dust absorption mouth intercommunication.
Preferably, the humidifying device is provided with a high-pressure spray head which sprays high-pressure atomized water towards the filter screen and/or the insect-proof net.
Preferably, the self-cleaning device further comprises a power source and a transmission mechanism, the power source is provided with a rotating power output shaft, the transmission mechanism is connected with the power output shaft of the power source, and the rotary dust collecting seat and the rotary dust discharging seat rotate under the driving of the transmission mechanism.
Preferably, the dust suction ports are arranged in a plurality and are arranged in a linear shape.
Preferably, the dust suction port extends along a plane parallel to the filter screen.
Preferably, the dust exhaust chamber is formed in the rotary dust exhaust seat, the dust exhaust chamber comprises a flow guide section and a pressurization section, the flow guide section is directly adjacent to the dust removal channel, the flow guide section is provided with a flow guide surface which is connected between the dust removal channel and the dust exhaust port and is inclined, and the cross section of the pressurization section is gradually reduced from the flow guide end to the dust exhaust port.
Preferably, the transmission mechanism comprises a transmission belt, and the transmission belt is sleeved on the power output shaft and the rotary dust collection seat or sleeved on the power output shaft and the rotary dust discharge seat.
Preferably, the rotary dust suction base is provided with a connecting end which is connected with the dust removal channel in a sealing and rotating manner, the connecting end is provided with a first belt pulley, and a first transmission belt is sleeved on the first belt pulley.
Preferably, the humidifying device comprises a water pump and a water circulating pipe communicated with the water pump, the water circulating pipe is supported in the fresh air channel through a support, and the high-pressure nozzles are uniformly distributed and installed on the water circulating pipe.
Preferably, the fresh air system further comprises a fresh air fan and a fresh air chamber communicated with the fresh air channel, and the fresh air fan introduces the air filtered by the fresh air channel into the fresh air chamber.
The beneficial effects of the utility model reside in that: the fresh air system of the utility model is provided with the humidifying device to wash the filter screen, so that the dust attached to the filter screen is washed away or loosened, and then the dust containing water is collected together through the self-cleaning device, so that the dust removal efficiency is higher, meanwhile, the flying dust generated in the dust absorption process is effectively reduced, the secondary dust falling phenomenon generated by the dust floating is avoided, and the dust removal effect is better; the fresh air system has a self-cleaning function by arranging the self-cleaning device, so that the air circulation of the fresh air system is ensured, the whole structure of the equipment is stable and high, and the installation and maintenance are convenient; adopt rotary type dust absorption seat, make linear dust absorption mouth form the comprehensive dust absorption of regional coverage, dust collection efficiency is higher, the utility model provides a reciprocating motion formula dust absorption among the relative prior art of rotary type dust absorption has higher synchronism, and dust collection efficiency is high in the unit interval, and the degree of cooperation between each component is high after long-term the practicality, need not additionally to set up components such as sensor and carries out the auxiliary detection to its formation, and the structure is simplified more, and control is convenient.
Drawings
Fig. 1 is a perspective view of a fresh air system.
Figure 2 shows that the new trend system is main to be looked the structural schematic diagram of direction.
FIG. 3 shows the structure diagram of the fresh air system of the present invention, showing the installation position of the water pump and the power source.
Fig. 4 is an exploded perspective view of the fresh air system.
Fig. 5 is a schematic structural view of the rotary dust suction base.
FIG. 6 shows the structure of the dust removing channel at another installation position of the dust removing fan.
Fig. 7 is a schematic structural view of a rotary dust exhaust seat.
Reference numerals:
1. a fresh air channel 2, a humidifying device 3, a self-cleaning device 4, a filter screen 5, an insect-proof screen 6 and a water receiver;
11. an air inlet 12 and an air outlet;
21. a high-pressure spray head 22, a water pump 23, a water circulating pipe 24 and a bracket;
31. the dust removal device comprises a dust removal channel, a dust removal fan, a rotary dust collection seat, a rotary dust exhaust seat, a power source, a transmission mechanism and a connection box body, wherein the dust removal channel is 32; 331. dust suction ports 341, dust discharge ports 342, dust discharge cavities 343, flow guide sections 344, pressure boosting sections 345 and flow guide surfaces;
361. a first transmission belt 362, a second transmission belt 363, a first belt pulley, 364 and a second belt pulley;
371. fan air intake, 372, fan air outlet.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
The invention will be further described with reference to the accompanying drawings.
In order to solve the technical problem, the utility model provides a new trend system is in order to solve a great deal of problem of prior art.
As shown in FIGS. 1-7, for the utility model provides a fresh air system's preferred embodiment, in this embodiment fresh air system includes fresh air channel 1, humidification device 2 and sets up self-cleaning device 3 in fresh air channel 1, install filter screen 4 in the fresh air channel 1, self-cleaning device 3 reciprocating motion removes dust to filter screen 4. The fresh air system also comprises a fresh air fan and a fresh air chamber communicated with the fresh air channel 1, and the fresh air fan introduces the air filtered by the fresh air channel 1 into the fresh air chamber. In the drawings of this embodiment, the fresh air fan and the fresh air chamber are not specifically drawn, and in specific implementation, the fresh air fan may be installed in the fresh air chamber or in the fresh air channel as long as the fresh air can be introduced into the fresh air chamber. Specifically, the fresh air channel 1 is provided with an air inlet 11 and an air outlet 12, the filter screen 4 is windward on one side facing the air inlet 11, and the humidifying device 2 is provided with a high-pressure spray head 21 which sprays high-pressure atomized water towards the filter screen 4. In specific implementation, the humidifying device 2 may spray high-pressure water toward the filter screen 4 and the insect-proof screen 5 at the same time, or only spray water to remove dust from the insect-proof screen 5. The high-pressure spray head 21 may be an existing high-pressure atomizing spray head, and therefore, the structure thereof is not described herein. Self-cleaning device 3 includes dust removal passageway 31, sets up dust removal fan 32 in dust removal passageway 31, the pivoted rotary type dust absorption seat 33 of installing on dust removal passageway 31, rotary type dust absorption seat 33 cavity forms the dust absorption chamber, and rotary type dust absorption seat 33 faces one side of windward side sets up dust absorption mouth 331, dust absorption mouth 331 and dust absorption chamber, dust removal passageway 31 all communicate. Specifically, as shown in fig. 2 and 4, in this embodiment, the dust removing channel 31 is vertically arranged, the filter screen 4 is horizontally arranged, and the self-cleaning filtering device 3 horizontally reciprocates to perform dust collection treatment on the filter screen 4.
The fresh air channel 1 is internally provided with an insect-proof net 5 on the windward side of the filter screen 4 (in the state shown in fig. 2, the insect-proof net 5 is arranged below the filter screen 4), and the insect-proof net 5 and the filter screen 4 are arranged at intervals. The self-cleaning device 3 is arranged between the filter screen 4 and the insect-proof screen 5, and the self-cleaning device 3 further comprises a rotary dust exhaust seat 34 which is rotatably arranged on the dust removal channel 31. Specifically, as shown in fig. 7, the rotary dust exhaust seat 34 is hollow to form a dust exhaust cavity 342, one side of the rotary dust exhaust seat 34 facing the insect-proof net 5 is provided with a dust exhaust port 341, and the dust exhaust port 341 is communicated with the dust exhaust port 331 through the dust removal passage 31. Specifically, the dust exhaust chamber 342 includes a flow guiding section 343 and a pressure increasing section 344, and the flow guiding section 343 is directly adjacent to the dust exhaust channel 31. That is, in the state shown in the embodiment of the present invention, the flow guiding section 343 is located above the pressurizing section 344. The flow guiding section 343 has an inclined flow guiding surface 345 connected between the dust removing passage 31 and the dust discharging opening 341, and the cross section of the pressure increasing section 343 in the vertical direction is gradually reduced from the flow guiding section 343 toward the dust discharging opening 341. After setting up like this, at the in-process of dust exhaust, at first the water conservancy diversion section 343 forms the water conservancy diversion effect to the discharge of dust, simultaneously, blows the dust air current and form sharp blowing dust power relatively speaking in dust exhaust chamber 342, the deuterogamy the setting of pressure boost section 343 can form bigger pressure when blowing dust, has both guaranteed that dust exhaust chamber 342 is smooth to discharge the mixture of dust and water, avoids attaching the deposition in the dust exhaust chamber, has increased the blowing dust power to fly net 5 simultaneously, can more fully blow off the dust on fly net 5.
Self-cleaning device 3 still includes power supply 35 and drive mechanism 36, power supply 35 has a pivoted power output shaft, and drive mechanism 36 is connected with the power output shaft of power supply 35, rotary type dust absorption seat 33 rotates under drive mechanism's 36 drive with rotary type dust exhaust seat 34. The transmission mechanism 36 includes a first transmission belt 361, a second transmission belt 362, a first pulley 363, and a second pulley 364. First driving belt 361 cup joints can the interlock on power output shaft and rotary type dust absorption seat 33 the rotary type dust absorption seat 33 rotates, second driving belt 362 cup joints can the interlock on power output shaft and rotary type dust exhaust seat 34 the rotary type dust exhaust seat 34 rotates. In specific implementation, only one power source 35 may be provided, where the power source may be a motor, a reducer, or the like, and both the first transmission belt 361 and the second transmission belt 362 are connected to a power output end of the first power source 35; also, as shown in fig. 2 of the present invention, two power sources 35 may be provided, and the first transmission belt 361 and the second transmission belt 362 may be respectively installed on the corresponding power sources.
Specifically, the rotary dust suction base 33 has a connection end connected to the rotation of the dust removal channel 31 in a sealing manner, the connection end is provided with a first belt pulley 363, and a first transmission belt 361 is sleeved on the first belt pulley 363. The dust removing fan 32 is installed in the connection box body 37, the connection box body 37 is provided with a fan air inlet 371 and a fan air outlet 372, the dust removing fan 32 is communicated with the dust removing channel 31 through the fan air inlet 371 and the fan air outlet 372, and the dust removing fan 32 can select an axial flow fan or a centrifugal fan according to actual installation space and arrangement mode. Similarly, the rotary dust exhaust seat 34 has a connection end connected to the rotation of the dust exhaust channel 31, the connection end is provided with a second belt pulley 364, and the second transmission belt 362 is sleeved on the second belt pulley 364. Specifically, in this embodiment, the dust removal fan 32 is disposed on a single side of the dust removal channel 31, or the dust removal fan 32 may be directly installed in a state shown in the drawing, as long as the sealing performance of the dust removal channel 31 is ensured, water flow (water vapor, etc.) does not enter the dust removal channel 31 in the humidification process, and the dust removal fan 32 is ensured to have a normal working environment.
The humidifying device 2 comprises a water pump 22 and a water circulating pipe 23 communicated with the water pump 22, the water circulating pipe 23 is supported in the fresh air channel 1 through a support 24, and the high-pressure nozzles 21 are uniformly distributed and installed on the water circulating pipe 23. The water pump 22 may be directly connected to an external water source or a water collection tank.
One side of the filter screen 4 opposite to the windward side is a leeward side, and specifically, the high-pressure spray head 21 sprays high-pressure atomized water towards the leeward side of the filter screen 4.
The self-cleaning device of new trend system starts dust exhausting fan 32 earlier, opens at the during operation power supply 35, first belt pulley 363 and second belt pulley 364 interlock first driving belt 361, second driving belt 362 respectively, and then drive rotary type dust absorption seat 33 and rotary type dust exhaust seat 34 and rotate, rotary type dust absorption seat 33 forms by line to the rotary type dust absorption of face to filter screen 4 by dust absorption mouth 331 when rotating, inhales the dust warp in the dust removal passageway 31 dust exhausting fan 32's conduction is blown out by dust exhaust mouth 341, will blow off attached to the dust on fly net 5 in the lump simultaneously. The humidifying device 2 can be turned on when needed, and the turning-on condition of the humidifying device 2 can be automatically turned on or manually turned on when the humidity, the pressure or the time reaches a preset value. Therefore, the utility model discloses whether can also further set up controller, humidity transducer, pressure sensor or time module etc. and open humidification device 2 and monitor, humidity transducer, pressure sensor, time module, power supply and water pump etc. all are connected with the controller.
The humidifying device 2 can directly spray water to the filter screen 4 or directly spray water to the insect-proof net 5. In this embodiment, it is described that the humidifying device 2 sprays water to the filter screen 4, after the humidifying device 2 is turned on, the moisture-containing dust is brought into the dust removing channel 31, is pressurized by the pressurizing section 344 of the dust discharging chamber 342, and then is sprayed out toward the insect-proof net 5, so that the stubborn dust hardened on the insect-proof net 5 can be removed by high-pressure water, and the dust removing effect is excellent. The bottom of the insect-proof net 5 can be further provided with a water receiver 6 for collecting the cleaned water flow. The water receiver 6 is a common container capable of collecting water, and is not particularly limited.
Specifically, the dust suction port 331 may extend along a plane parallel to the plane of the filter screen as shown in fig. 4. In addition, the dust suction port 331 may be formed in a plurality of small holes and arranged in a line. Thus, the dust suction port 331 can perform a full-surface dust suction from line to surface even when rotating with the rotating dust suction base 33.
The fresh air system of the utility model is provided with the humidifying device 2 to wash the filter screen 4, so that the dust attached to the filter screen 4 is washed away or loosened, and then the water-containing dust is collected together through the self-cleaning device 3, so that the dust removal efficiency is higher, the flying dust generated in the dust absorption process is effectively reduced, the secondary dust falling phenomenon generated by dust floating is avoided, and the dust removal effect is better; the fresh air system has a self-cleaning function by arranging the self-cleaning device 3, so that the air circulation of the fresh air system is ensured, the whole structure of the equipment is stable and high, and the installation and maintenance are convenient; adopt rotary type dust absorption seat 33, make linear dust absorption mouth 331 form the comprehensive dust absorption of regional coverage, dust collection efficiency is higher, the utility model provides a reciprocating motion formula dust absorption among the relative prior art of rotary type dust absorption has higher synchronism, and dust collection efficiency is high in the unit interval, and the cooperation degree between each component is high after long-term the practicality, need not additionally to set up components such as sensor and carries out the auxiliary detection to its formation, and the structure is simplified more, and control is convenient.
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. A new trend system which characterized in that: including new trend passageway, humidification device and setting self-cleaning device in new trend passageway, install filter screen and fly net in the new trend passageway, new trend passageway has an air intake, an air outlet, the filter screen is the windward side in the one side of air intake facing, fly net installs the one side of the windward side of filter screen in the passageway, self-cleaning device installs between filter screen and fly net, humidification device is used for spraying high pressure atomized water to filter screen and \ or fly net, self-cleaning device includes dust removal passageway, set up dust exhausting fan in dust removal passageway, the rotary type dust absorption seat of rotary installation in dust removal passageway, the rotary type dust exhaust seat of rotary installation in dust removal passageway, the hollow dust absorption chamber that forms of rotary type dust exhaust seat, the rotary type dust absorption seat face is right one side of windward side sets up the dust absorption mouth, the dust absorption mouth all communicates with dust absorption chamber, dust removal passageway, the rotary type dust exhaust seat is in the face of one side of fly net sets up the dust exhaust mouth, the dust exhaust mouth passes through dust removal passageway and dust absorption mouth intercommunication.
2. The fresh air system of claim 1, wherein: the humidifying device is provided with a high-pressure spray head which sprays high-pressure atomized water towards the filter screen and/or the insect-proof net.
3. The fresh air system of claim 1 or 2, wherein: the self-cleaning device further comprises a power source and a transmission mechanism, wherein the power source is provided with a rotating power output shaft, the transmission mechanism is connected with the power output shaft of the power source, and the rotary dust collection seat and the rotary dust exhaust seat rotate under the driving of the transmission mechanism.
4. The fresh air system of claim 1, wherein: the dust absorption openings are arranged in a plurality and are arranged in a linear shape.
5. The fresh air system of claim 1, wherein: the dust suction port extends along a plane parallel to the filter screen.
6. The fresh air system of claim 1, wherein: the rotary dust exhaust seat is internally formed with a dust exhaust cavity, the dust exhaust cavity comprises a flow guide section and a pressurization section, the flow guide section is directly adjacent to the dust removal channel, the flow guide section is provided with a flow guide surface connected between the dust removal channel and the dust exhaust port, and the cross section of the pressurization section is gradually reduced towards the dust exhaust port from the flow guide end.
7. The fresh air system of claim 3, wherein: the transmission mechanism comprises a transmission belt, and the transmission belt is sleeved on the power output shaft and the rotary dust collection seat or sleeved on the power output shaft and the rotary dust discharge seat.
8. The fresh air system of claim 7, wherein: the rotary dust absorption seat is provided with a connecting end connected with the rotation of the dust removal channel seal, a first belt pulley is installed at the connecting end, and a first transmission belt is sleeved on the first belt pulley.
9. The fresh air system of claim 2, wherein: the humidifying device comprises a water pump and a water circulating pipe communicated with the water pump, the water circulating pipe is supported in the fresh air channel through a support, and the high-pressure nozzles are uniformly distributed and installed on the water circulating pipe.
10. The fresh air system of claim 7, wherein: the fresh air system also comprises a fresh air fan and a fresh air chamber communicated with the fresh air channel, and the fresh air fan introduces the air filtered by the fresh air channel into the fresh air chamber.
CN201921829843.7U 2019-10-29 2019-10-29 Fresh air system Expired - Fee Related CN212006115U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201921829843.7U CN212006115U (en) 2019-10-29 2019-10-29 Fresh air system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201921829843.7U CN212006115U (en) 2019-10-29 2019-10-29 Fresh air system

Publications (1)

Publication Number Publication Date
CN212006115U true CN212006115U (en) 2020-11-24

Family

ID=73411329

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201921829843.7U Expired - Fee Related CN212006115U (en) 2019-10-29 2019-10-29 Fresh air system

Country Status (1)

Country Link
CN (1) CN212006115U (en)

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CF01 Termination of patent right due to non-payment of annual fee

Granted publication date: 20201124

Termination date: 20211029

CF01 Termination of patent right due to non-payment of annual fee