CN208865352U - Automatically cleaning air filter - Google Patents
Automatically cleaning air filter Download PDFInfo
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- CN208865352U CN208865352U CN201821583867.4U CN201821583867U CN208865352U CN 208865352 U CN208865352 U CN 208865352U CN 201821583867 U CN201821583867 U CN 201821583867U CN 208865352 U CN208865352 U CN 208865352U
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- solenoid valve
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- air filter
- filter core
- filter
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Abstract
The utility model discloses a kind of automatically cleaning air filters, main filter core is set in air filter housing, in housing side, air inlet is set, in shell upper end, gas outlet is set, pressure gas source passes through piping connection to solenoid valve, solenoid valve is by being provided with ash discharging hole in housing bottom in piping connection to safety filter element.The pressure gas source of the utility model is passed through in piping connection to safety filter element by piping connection to solenoid valve, solenoid valve.The forced draft of the utility model is entered in safety filter element by blowback after solenoid valve, blowback can make air stream body generate powerful pressure difference in the surfaces externally and internally moment of filter core, it forces dust contaminant particle to break up removing from filter core outer surface, is discharged under the action of air flow field from air inlet or ash discharging hole.The active force of blowback acts on the inner surface of entire safety filter element, and active force is more uniform, will not destroy the filter paper of filter core outer surface；The reuse for realizing main filter core simultaneously, prolongs the service life, and reduces air filter maintenance cost.
Description
Technical field
The utility model relates to air filter technical field, especially a kind of automatically cleaning air filter.
Background technique
The engine of the vehicles such as gasoline, diesel vehicle, engineering machinery and farm machinery needs the extraneous air that provides to burn
Start, the air filter being installed on vehicle can filter out the pollutants such as dust in air, sand grains, to provide for engine
Enough, clean air.The working principle of air filter is that outside air enters from air inlet, then passes through main filter core, ash
The pollutants such as dirt, the grains of sand are attracted to main filter core outer surface, and clean air is finally flowed out from gas outlet using safety filter element
Into engine.With the accumulation for using the time, the quantity of the pollutant of main filter core outer surface capture is increasing, and main filter core is most
Reach permitted maximum resistance and dust containing capacity when design eventually, namely reach the service life of filter core, at this time, it is necessary to main filter
Core is replaced.On the one hand discarded filter core can not reuse, and cause the significant wastage of resource, another aspect long run
Vehicle in bad environments location need to often replace filter core, and vehicle maintenance maintenance cost rises, and replace filter core and need to expend
The stoppage in transit of the time of half a day to one day, landship, engineering machinery and farm machinery will bring certain economic loss.
Chinese patent ZL2009201039906 discloses one kind and exempts from maintenance type automatically cleaning air filtering core assembly apparatus, is filtering
One root long tracheae is set inside core assembly, several wind grooves are arranged on tracheae, exhaust fan is set on filter housing, is filtered
When device automatically cleaning, filter core assembly rotation, the gas that high-pressure pump comes out is from the wind groove blowout on tracheae, by the filter core appearance of rotation
The pollutants such as the dust in face are blown off, and exhaust fan is recycled to extract the dust blown off on filter core from filter housings out.Actual use
In the process, since wind groove is that interval is uniformly arranged, so will appear blowing dead angle, cartridge top in the position for being not provided with wind groove
Also have blowing dead angle with bottom, the dust on these dead angle positions can not thoroughly be blown clean, wind groove carry out local blowing ratio, wind-force compared with
When big, since local blowing ratio area is small, pressure is big, and the filter paper of cartridge surface is easy to be blown brokenly, and causing filter core to damage completely can not
It uses.
Utility model content
The applicant can not clear up all grey trifle in the worlds on filter core for above-mentioned existing air filtering core device automatically cleaning process
Object is easily damaged the disadvantages of filter paper of cartridge surface, a kind of structurally reasonable automatically cleaning air filter is provided, by collecting gas bag
Comprehensive pulse backblowing is carried out with solenoid valve, so that it is more thorough uniformly to remove pollutants, the deashings such as the dust of filter core outer surface.
Technical solution used by the utility model is as follows:
A kind of automatically cleaning air filter, is arranged main filter core in air filter housing, and air inlet is arranged in housing side
Mouthful, gas outlet is set in shell upper end, pressure gas source passes through piping connection to safety by piping connection to solenoid valve, solenoid valve
In filter core, housing bottom is provided with ash discharging hole.
As a further improvement of the above technical scheme:
Collection gas bag is connected between pressure gas source and solenoid valve, gas collection, which is wrapped, is provided with pressure gauge.
Solenoid valve is connected to power supply by pulse control instrument.
Safety filter element is set in main filter core, and intake elbow one end is connect with solenoid valve, and the other end is towards inside safety filter element.
Side is provided with vibrating motor below hull outside, and vibrating motor passes through motor oscillating frequency controller and power supply
Connection.
The end of the ash discharging hole is provided with ash-valve；In the side of gas outlet, pressure alarm is set；Pipeline diameter is
G1/4 " arrives G4 "；In housing bottom, end cap is set.
A kind of automatically cleaning step using above-mentioned air filter, includes the following steps:
S1, air filter progress air filtration is opened, outside air enters from air inlet, filters by main filter core and safety
Core filtering, is discharged from gas outlet；
S2, pressure gas source is opened, compressed air is full of pipeline, when the pressure value of pressure gauge feedback is equal to the defeated of pressure gas source
Out when pressure value, accumulation of energy is finished, but solenoid closure；
S3, solenoid valve is opened, compressed air enters blowback inside filter core, and dust debris are discharged from ash discharging hole.
As a further improvement of the above technical scheme:
The step S3 further include: solenoid valve is controlled using pulse control instrument, when solenoid valve open time 0.05~1 second
Afterwards, solenoid valve is closed, solenoid valve opens solenoid valve after closing 1 second~1 minute, so recycles operation repeatedly until filter core is completely clear
It is clean clean.
The step S3 further include: open motor oscillating frequency controller, vibrating motor is patted vibration air filter, made
Dust on filter core is easier to fall.
Further include step S4: opening end cap, the dust of bottom is discharged.
The beneficial effects of the utility model are as follows:
The pressure gas source of the utility model passes through piping connection to safety filter element by piping connection to solenoid valve, solenoid valve
It is interior.The forced draft of the utility model is entered in safety filter element by blowback after solenoid valve, and blowback can be such that air stream body is filtering
The surfaces externally and internally moment of core generates powerful pressure difference, forces dust contaminant particle to break up removing from filter core outer surface, in sky
A part is discharged from air inlet under the action of airflow field, and a part is discharged from ash discharging hole.The active force of blowback acts on entire peace
The inner surface of full filter core, active force is more uniform, will not destroy the filter paper of filter core outer surface；The weight of main filter core may be implemented simultaneously
It is multiple to use, extend the service life of main filter core, to substantially reduce air filter maintenance cost.
The utility model is provided with collection gas bag between pressure gas source and solenoid valve, and gas collection, which is wrapped, is provided with pressure gauge, collection
Gas bag can store the compressed air of pressure gas source offer, so that enough pulse backblowing air are provided, by observing pressure gauge
Compressed air energy accumulating state in real-time monitoring collection gas bag, the opening and closing of collection gas bag cooperation solenoid valve are anti-by the strength obtained every time
Blowing gas stream is passed through inside filter core.
The solenoid valve of the utility model is connected to power supply by pulse control instrument, the control by pulse control instrument to solenoid valve
System recycles the compressed air introduced in a manner of air pulse and is blown into air filter repeatedly, passes through repeated multiple times air-flow
Blowback thoroughly removes the dust of filter core outer surface.
The utility model intake elbow horizontal segment extends outwardly across gas outlet side wall to be connect with solenoid valve, inside gas outlet
Vertical section it is downward, lower end outlet only slightly gos deep into shell, do not extend downwardly and go deep into inside filter core, air-flow score can be made
Cloth is more comprehensive, sprays air-flow outward from the entire inner surface of safety filter element, to more fully take away main filter core outer surface
Dust and pollution without particle, be not in dead angle and residual.
The utility model side below hull outside is provided with vibrating motor, and vibrating motor passes through the control of motor oscillating frequency
Device processed connects to power supply.The shell that air filter is patted by vibrating motor, makes the obstinate dust on filter core fall off, plays auxiliary
Ash-removal effect is helped, the return rate of main filter core reverse gas cleaning is further increased, greatly extends the service life of main filter core, is dropped
Low latitude air filter maintenance cost.
End cap is arranged in housing bottom in the utility model, and a part of dust can be in gravity and air flow field in use process
It is deposited under comprehensive function in the end cap of air filter, can periodically open end cap and remove dust, so that thoroughly discharge is internal
Dust.
The utility model is directly entire blowback system using vehicle-mounted compressed air or plant compressed air as pressure gas source
Compressed air is provided, the manufacture and operating cost of system can be effectively reduced, improves the feasibility of device implementation.This is practical
It is novel to need to be mounted on the corresponding position of vehicle, equipment according to what vehicle, equipment were run, it is independent can be also detached from vehicle, equipment
Arrangement, it is adaptable, easy to operate, of simple structure and low cost.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of the utility model.
Fig. 2 is the cross-sectional view of the utility model.
In figure: 1, power supply；2, plant-grid connection line；3, electric-controlled box；4, power of electromagnetic valve control line；5, third pipeline；6, electric
Magnet valve；7, the second connector；8, intake elbow；9, gas outlet；10, pressure alarm；11, vibrating motor power control line；12, it presses
Strength source；13, output pipe；14, collect gas bag；15, pressure gauge；16, the first pipeline；17, the first connector；18, the second pipeline；
19, ash-valve；20, ash discharging hole；21, the first mounting bracket；22, the second mounting bracket；23, shell；24, third mounting bracket；
25, vibrating motor；26, air inlet；27, pulse control instrument；28, electromagnetism valve air gate；29, electromagnetic valve air inlet；30, motor shakes
Dynamic frequency controller；31, third connector；32, main filter core；33, safety filter element；34, end cap；35, connection jaws.
Specific embodiment
With reference to the accompanying drawing, illustrate specific embodiment of the present utility model.
As shown in Figure 1 and Figure 2, the air filter of the utility model is rounded cylindrical structure, in air filter housing 23
Safety filter element 33 and main filter core 32 are inside set gradually from inside to outside, and in 23 1 upper side of shell, air inlet 26, corresponding safety are set
Cylindrical gas outlet 9 is arranged in filter core 33 above shell 23, and the diameter of gas outlet 9 is less than or equal to the interior diameter of safety filter element 33.
End cap 34 is set in 23 bottom of air filter housing, ash discharging hole 20 is arranged in 23 bottom side of shell, the end of ash discharging hole 20
It is provided with ash-valve 19, the part dust outside a small amount of dust and main filter core 32 outside safety filter element 33 is in gravity and air stream
It is deposited on the end cap 34 of air filter under the comprehensive function of field, end cap 34 can periodically open cleaning.Outside shell 23
Lower section side is provided with vibrating motor 25.Pressure alarm 10 is set in the side of gas outlet 9, pressure alarm 10 is for monitoring
The carrying situation of the pollutants such as filter core outer surface dust, the timely warning note when reaching certain bearing capacity.Intake elbow 8 is 90
Spend dog leg piping, horizontal segment pass through 9 side wall of gas outlet extend outwardly, the vertical section inside gas outlet 9 downward, positioned at shell 23
On central axes, lower end outlet is only slightly goed deep into shell 23, does not extend downwardly and gos deep into inside filter core, can so make air-flow
Distribution is more comprehensively uniform, sprays air-flow outward from the entire inner surface of safety filter element 33, to more fully take away filter core
The dust of outer surface and pollution are not in dead angle and residual without particle.As shown in Figure 1, vibrating motor 25 is installed by third
Bracket 24 is mounted on air filter housing 23, and vibrating motor 25 also may be mounted at outside end cap 34, and air filter is logical
It crosses the first mounting bracket 21 and the second mounting bracket 22 is mounted on vehicle, in equipment.
As shown in Fig. 2, the pressure gas source 12 of the utility model gas supply part passes through output pipe 13, third connector 31 and collection
The connection of gas bag 14 is simultaneously in communication, and pressure gauge 15 is arranged on collection gas bag 14, and 16 one end of the first pipeline is connect simultaneously with collection gas bag 14
In communication, the other end is connect by the first connector 17 with the second pipeline 18, the solenoid valve air inlet of the second pipeline 18 and solenoid valve 6
Mouth 29 connects.Solenoid valve 6 is Direct Action Type 2/2-way solenoid valve, and the electromagnetism valve air gate 28 and third pipeline 5 of solenoid valve 6 connect
It connects, third pipeline 5 is connect by the second connector 7 with the horizontal segment of intake elbow 8.
The collection gas bag 14 of the present embodiment uses the split type structure arranged apart with air filter, and split type structure can be with
More preferably, the space layout requirement of more flexible adaptation air filter, installation and maintenance are more convenient, production cost and difficulty
It spends lower.Collecting gas bag 14 can also be using the integrated structure with air filter disjunctor, and such arrangement is to whole system
Space layout is more demanding, but since respective line is simplified significantly, dust removing effects are even more ideal.
As shown in Fig. 2, the power supply 1 of the utility model electric control system passes through the arteries and veins in plant-grid connection line 2 and electric-controlled box 3
The connection of controller 27 is rushed, pulse control instrument 27 is connect by power of electromagnetic valve control line 4 with solenoid valve 6, and pulse control instrument is utilized
27 realize the repeated multiple times gas collection process of collection gas bag 14, using the high-intensitive multiple back flushing filter core of air-flow, to thoroughly remove sky
Dust and contaminant particle inside air filter；The reuse of main filter core 32 may be implemented in pulse backblowing self-cleaning function,
The service life of main filter core 32 can greatly be extended, to substantially reduce the maintenance cost of air filter.Plant-grid connection line 2
Another bypass connect with the motor oscillating frequency controller 30 in electric-controlled box 3, motor oscillating frequency controller 30 passes through vibration
Dynamic motor power control line 11 is connect with the connection jaws 35 of vibrating motor 25.It can be adjusted by motor oscillating frequency controller 30
The vibration frequency and vibration force of vibrating motor 25 are to adapt to different types.Vibrating motor 25 pats shell 23, makes on filter core
Obstinate dust falls off, and plays auxiliary ash-removal effect, further increases the return rate of filter core reverse gas cleaning, a greater degree of to extend filter
The service life of core reduces air filter maintenance cost.
Timing delay switch circuit can be selected in the primary electron component of pulse control instrument 27, so that it is portable to improve installation
Property, reduce manufacturing cost.The total duration of the adjustable pulse backblowing of pulse control instrument 27, single blowback is through-flow duration and arteries and veins
The parameters such as punching interval duration, to meet the blowback effect of various different model air filters.
The airflow channel diameter that first pipeline 16, the second pipeline 18, solenoid valve 6, intake elbow 5 and union elbow 8 form
Larger to the blowback influential effect of the utility model, the airflow channel diameter of the utility model is preferably G1/4 " (2 points, Φ 8mm)
To G4 " (4 cun, Φ 102mm), G1/4 " (2 points, Φ 8mm), G3/8 " (3 points, Φ 10mm), G1/2 " (4 points, Φ can be
15mm), G3/4 " (6 points, Φ 20mm), G1 " (1 cun, Φ 25mm), G1-1/4 " (1.2 cun, Φ 32mm), G1-1/2 " (1.5 cun,
Φ 40mm), G2 " (2 cun, Φ 50mm), G2-1/2 " (2.5 cun, Φ 62mm), G3 " (3 cun, Φ 76mm), G3-1/2 " (3.5 cun,
Φ 90mm) or G4 " (4 cun, Φ 102mm).Airflow channel diameter is more preferably G3/4 " to G2 ".
When the utility model is used, the utility model is mounted on automobile first or other need the equipment of air cleaning
On, anti-drain process is carried out at each screw thread using unsintered tape or thread locking adhesive, it is ensured that the utility model all parts
All firmly install.Collection gas bag 14 is connected to pressure gas source 12 by third connector 31, which can be vehicle-mounted pressure
Gas source or plant compressed air gas source, pressure output are 0.5 ~ 1.0MPa.Electric-controlled box 3 is connected to power supply 1, which can be
Vehicle power supply or other 24V DC power supplies.
The course of work of the utility model is as follows:
(1) when air filter works normally, outside air enters inside air filter from air inlet 26, dirty sky
For gas after main filter core 32, most of dust debris rest on the outer surface of main filter core 32, and outside air then passes through safe filter
Core 33 carries out secondary filter, and dust debris rest on 33 outer surface of safety filter element, is finally discharged from the gas outlet 9 of top, Xiang Fa
Motivation gas supply.
(2) compressed air is transported in collection gas bag 14 by pressure gas source 12 by compressed air output pipe 13, and pressure is defeated
Out it is 0.5 ~ 1.0Mpa, by the compressed air energy accumulating state in observation 15 real-time monitoring collection gas bag 14 of pressure gauge, works as pressure gauge
When the pressure value of 15 feedbacks is equal to the output pressure value of pressure gas source 12, indicate that collection gas bag 14 is ready, it is primary to be blown
The pressure loss be less than the 30% of former pressure value.At this point, the spool of solenoid valve 6 is in close state, compressed air is from collection gas bag 14
Into the first pipeline 16, the first connector 17 and the second pipeline 18, but solenoid valve 6 can not be passed through.
(3) terminal user judges whether that needing to carry out blow back self-cleaning moves according to the pressure alarm 10 on air filter
Make or system is judged automatically according to program setting, such as to carry out blow back self-cleaning, opens the pulse control in electric-controlled box 3
Instrument 27 processed, solenoid valve 6 are opened under the control of pulse control instrument 27, and the compressed air of 29 side of electromagnetic valve air inlet can lead to moment
The spool for crossing solenoid valve 6 is ejected from electromagnetism valve air gate 28, enters air filtration by third pipeline 5 and intake elbow 8
Inside the safety filter element 33 of device, the pressure loss that collection gas bag 14 is once blown is less than the 30% of former pressure value.
(4) compressed air entered inside air filter 1 leads to its volume moment since environmental pressure moment reduces
Expansion forms a large amount of air fluid, and air fluid is since a period of time can not discharge, outside air filter and in safety filter element 33
Powerful pressure difference namely safety filter element 33 and 32 inner surface pressure of main filter core are generated much higher than its appearance surface pressure, formed by
It is interior to arrive outer air flow field.When air is gone out from inside to outside, 32 outer surface of 33 outer surface of safety filter element and main filter core will be attached to
Dust and sundries blow off, the dust and sundries that main 32 outer surface of filter core is fallen leave from air inlet 26 or ash discharging hole 20, due to
The active force of blowback acts on the inner surface of entire safety filter element 33, and active force is more uniform, therefore will not destroy filter core appearance
The filter paper in face.Ash-valve 19 is the moccasin rubber of duckbill, and the valve port of closure can prevent outside air from entering, while in inside
Pressure opens the pollutants such as discharge dust when being greater than external pressure.
(5) if you need to use vibrating function, only motor oscillating frequency controller 30 need to be opened, vibrating motor 25 according to setting in advance
The vibration frequency set pats vibration air filter, and the dust on filter core is made to be easier to fall, to play the work of auxiliary deashing
With.Vibration force controls within the acceptable fatigue strength of air filter, is no more than 160kg, and vibration frequency is set as air
The resonant frequency of filter or near resonant frequency.Vibration force and vibration frequency can be carried out according to air filter specification
Selection, the installation site of vibrating motor 25 can space layout according to the present utility model specifically set.
(6) 6 spool opening time of solenoid valve closed solenoid valve 6, pressure gas source 12 is again to collection gas bag 14 after 0.05 ~ 1 second
Compressed air is provided, until output pressure value of the pressure value equal to pressure gas source 12 that pressure gauge 15 is fed back, expression accumulation of energy
Terminate, the accumulation of energy time is between 1 second ~ 1 minute, then opens the spool of solenoid valve 6, and powerful air fluid is again introduced into air mistake
Filter is internal to carry out blow back self-cleaning movement, and the interval time of the opening and closing of 6 valve of solenoid valve is controlled by pulse control instrument 27,
So circulation repeatedly operation until filter core it is completely clean, the single blowback cleaning operation of the present embodiment about need circulation 20 ~
100 times.Each total duration of Pulse Cleaning, the number of single blowback, single open and close time according to collection gas bag 14
Amount of capacity, the shape of the pressure recharge rate of pressure gas source 12 and air filter, size determine.
(7) the part dust outside the dust and main filter core 32 outside safety filter element 33 is deposited on the end of bottom due to gravity
In lid 34, the utility model after using for a longer period, can according to need, open air filter bottom end cap 34, row
The dust of bottom out.
Above description is the explanation to the utility model, is not the restriction to utility model, without prejudice to the utility model
In the case where spirit, the utility model can make any type of modification.Such as the structure of the air filter of the utility model
In addition to traditional axial seal, radial seal air filter, it is also possible to the air filter and various shape of novel cellular filter core
Different special-shaped filter core.
Claims (9)
1. a kind of automatically cleaning air filter, the main filter core (32) of setting in air filter housing (23), in shell (23) side
Air inlet (26) are arranged in face, gas outlet (9) are arranged in shell (23) upper end, it is characterised in that: pressure gas source (12) passes through pipeline
It is connected to solenoid valve (6), solenoid valve (6) is by being provided with row in shell (23) bottom in piping connection to safety filter element (33)
Grey mouth (20).
2. automatically cleaning air filter described in accordance with the claim 1, it is characterised in that: pressure gas source (12) and solenoid valve (6)
Between be connected with collection gas bag (14), collection gas bag (14) on be provided with pressure gauge (15).
3. automatically cleaning air filter described in accordance with the claim 1, it is characterised in that: solenoid valve (6) passes through pulse control instrument
(27) it is connect with power supply (1).
4. automatically cleaning air filter described in accordance with the claim 1, it is characterised in that: safety filter element is arranged in main filter core (32)
(33), intake elbow (8) one end is connect with solenoid valve (6), and the other end is internal towards safety filter element (33).
5. automatically cleaning air filter described in accordance with the claim 1, it is characterised in that: set in the external lower section side of shell (23)
It is equipped with vibrating motor (25), vibrating motor (25) is connect by motor oscillating frequency controller (30) with power supply (1).
6. automatically cleaning air filter described in accordance with the claim 1, it is characterised in that: the end of the ash discharging hole (20) is arranged
There are ash-valve (19).
7. automatically cleaning air filter described in accordance with the claim 1, it is characterised in that: pressure is arranged in the side of gas outlet (9)
Power alarm (10).
8. automatically cleaning air filter described in accordance with the claim 1, it is characterised in that: pipeline diameter G1/4 " arrives G4 ".
9. automatically cleaning air filter described in accordance with the claim 1, it is characterised in that: end cap is arranged in shell (23) bottom
(34).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821583867.4U CN208865352U (en) | 2018-09-28 | 2018-09-28 | Automatically cleaning air filter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821583867.4U CN208865352U (en) | 2018-09-28 | 2018-09-28 | Automatically cleaning air filter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208865352U true CN208865352U (en) | 2019-05-17 |
Family
ID=66468985
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821583867.4U Active CN208865352U (en) | 2018-09-28 | 2018-09-28 | Automatically cleaning air filter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208865352U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108970284A (en) * | 2018-09-28 | 2018-12-11 | 无锡亿利环保科技有限公司 | Automatically cleaning air filter and its automatically cleaning step |
| CN114607538A (en) * | 2022-03-02 | 2022-06-10 | 安徽工业大学 | Self-cleaning air filter |
| CN116480501A (en) * | 2023-03-07 | 2023-07-25 | 华能南京燃机发电有限公司 | Air filter for diesel engine |
-
2018
- 2018-09-28 CN CN201821583867.4U patent/CN208865352U/en active Active
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108970284A (en) * | 2018-09-28 | 2018-12-11 | 无锡亿利环保科技有限公司 | Automatically cleaning air filter and its automatically cleaning step |
| CN114607538A (en) * | 2022-03-02 | 2022-06-10 | 安徽工业大学 | Self-cleaning air filter |
| CN116480501A (en) * | 2023-03-07 | 2023-07-25 | 华能南京燃机发电有限公司 | Air filter for diesel engine |
| CN116480501B (en) * | 2023-03-07 | 2023-10-27 | 华能南京燃机发电有限公司 | Air filter for diesel engine |
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