CN113777004A - Automatic maintenance verification device and method for air filter - Google Patents
Automatic maintenance verification device and method for air filter Download PDFInfo
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- CN113777004A CN113777004A CN202110964989.8A CN202110964989A CN113777004A CN 113777004 A CN113777004 A CN 113777004A CN 202110964989 A CN202110964989 A CN 202110964989A CN 113777004 A CN113777004 A CN 113777004A
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- 238000012423 maintenance Methods 0.000 title claims abstract description 95
- 238000000034 method Methods 0.000 title claims abstract description 39
- 238000012795 verification Methods 0.000 title claims abstract description 28
- 239000000428 dust Substances 0.000 claims abstract description 108
- 238000007664 blowing Methods 0.000 claims abstract description 69
- 238000012545 processing Methods 0.000 claims description 12
- 230000008859 change Effects 0.000 claims description 9
- 238000004364 calculation method Methods 0.000 claims description 4
- 238000011084 recovery Methods 0.000 claims description 4
- 238000004088 simulation Methods 0.000 claims description 3
- 238000004380 ashing Methods 0.000 claims 1
- 238000005259 measurement Methods 0.000 claims 1
- 230000008569 process Effects 0.000 abstract description 17
- 230000000694 effects Effects 0.000 description 24
- 238000011010 flushing procedure Methods 0.000 description 15
- 238000012360 testing method Methods 0.000 description 14
- 239000012535 impurity Substances 0.000 description 4
- 230000009471 action Effects 0.000 description 3
- 230000007547 defect Effects 0.000 description 2
- 238000013461 design Methods 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001186 cumulative effect Effects 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 238000011545 laboratory measurement Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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- G—PHYSICS
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- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
- G01N15/08—Investigating permeability, pore-volume, or surface area of porous materials
- G01N15/082—Investigating permeability by forcing a fluid through a sample
- G01N15/0826—Investigating permeability by forcing a fluid through a sample and measuring fluid flow rate, i.e. permeation rate or pressure change
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume, or surface-area of porous materials
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- G01N2015/084—Testing filters
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Abstract
The application relates to commercial car admits air and filters technical field, in particular to empty automatic maintenance verification device and method of straining, empty automatic maintenance verification device of straining is used for simulating the operational environment of the empty filter in desert, and simulates the automatic maintenance of the empty filter in desert, it includes: a dust injector for blowing dust into the desert air filter from an air inlet of the desert air filter; the air blowing device is used for blowing air into the desert air filter from an air outlet of the desert air filter; a dust collector for collecting dust blown out from the desert air filter; and the resistance measuring device is used for measuring the air intake resistance of the desert air filter. The application is used for simulating the running environment of the desert air filter and simulating the automatic maintenance process of the desert air filter. And the values of dust amount and air inlet resistance value in the desert air filter before and after maintenance are measured and compared, so as to judge and verify whether the automatic maintenance of the desert air filter is effective or not.
Description
Technical Field
The application relates to the technical field of air intake and filtration of commercial vehicles, in particular to an air filter automatic maintenance verification device and method.
Background
The air filter needs maintenance after a period of use, the end cover and the main filter element are detached, and compressed air is blown from inside to outside to clean dust attached to the filter element. The pressure of compressed air can not be too high, otherwise easily damage paper filter core, but the user generally is difficult to obtain compressed air, and the direction of blowing has strict requirement simultaneously, and the maintenance operation requirement is more and loaded down with trivial details, and misoperation can cause the damage to the filter core.
Therefore, part of the main engine plants or air filter suppliers design an air filter system with an automatic maintenance function, the air filter back-blowing system is externally connected with power and high-pressure gas to generate power for driving dust and impurity discharge, the separated dust and impurity are effectively removed through back-blowing the air filter, active dust removal is realized, maintenance-free maintenance of the air filter is realized, the defects of non-standard conventional maintenance operation, uncontrollable air pressure, excessive maintenance and the like are avoided, the reliability and the convenience of maintenance are improved, and the use cost of a user is reduced.
However, it is difficult to verify the maintenance effect of the air filter blowback system through the actual driving of the vehicle, and there is no corresponding device to verify whether the automatic maintenance function of the air filter is really effective, so that a problem of how to verify the actual effect of the air filter with the automatic maintenance function is urgently needed to be solved.
Disclosure of Invention
The embodiment of the application provides an air filter automatic maintenance verification device and method, and aims to solve the technical problem that the maintenance effect of an air filter blowback system is difficult to verify in the related art.
In a first aspect, an air filter automatic maintenance verification device is provided for simulating a running environment of an air filter in a desert, and simulating automatic maintenance of the air filter in the desert, which includes:
a dust injector for blowing dust into the desert air filter from an air inlet of the desert air filter;
the air blowing device is used for blowing air into the desert air filter from an air outlet of the desert air filter;
a dust collector for collecting dust blown out from the desert air filter;
and the resistance measuring device is used for measuring the air intake resistance of the desert air filter.
In some embodiments, the automatic maintenance verification device for air filter further comprises a weight measuring piece, and the dust collector knows the weight change of the dust collector through the weight measuring piece.
In some embodiments, the air blowing device comprises:
the air pipe is communicated with an air outlet of the desert air filter;
the air storage cylinder is communicated with the air pipe so as to blow air into the desert air filter through the air pipe;
the valve is arranged on the air pipe.
In some embodiments, the resistance measuring device comprises:
the first pressure measuring pipe is communicated with an air inlet of the desert air filter;
the second pressure measuring pipe is communicated with an air outlet of the desert air filter;
and the pressure gauge is arranged between the first pressure measuring pipe and the second pressure measuring pipe so as to display the air inlet resistance of the desert air filter.
In a second aspect, an air filter automatic maintenance verification method is provided, based on the air filter automatic maintenance verification device, including the following steps:
measuring the initial air intake resistance P0 of the desert air filter, and measuring the initial weight M0 of the dust collector;
adding ash into the desert air filter for n times, and recording the air inlet resistance P1n of the desert air filter and the weight M1n of a dust collector after each ash adding;
carrying out back flushing operation on the desert air filter after adding ash to the desert air filter each time, and recording air inlet resistance P2n of the desert air filter and weight M2n of a dust collector after each back flushing operation;
and (6) data arrangement.
In some embodiments, before performing the graying n times in the desert air filter, the method further includes:
the weight and time for adding ash into the desert air filter each time are preset so as to simulate the ash inlet amount of the desert air filter in 12-hour continuous work.
In some embodiments, the back-blowing operation into the desert air filter includes:
and continuously and discontinuously opening the blowing device for 6 times to perform back blowing on the desert air filter.
In some embodiments, the data processing comprises: calculating resistance recoveries R1 and R2;
R1＝(P0/P1n)*100％，R2＝(P0/P2n)*100％；
wherein R1 and R2 respectively represent resistance resilience of the desert air filter after each time of ash addition and each time of back blowing towards the desert air filter, and whether R1 and R2 are in a usable range is judged.
In some embodiments, the data processing comprises calculation of accumulated dust amounts M1 and M2 on the surface of the filter element inside the desert air filter;
M1＝M1n-M0，M2＝M2n-M0；
wherein M1 and M2 respectively represent the dust quantity accumulated on the surface of the filter element in the desert air filter after each time of ash addition and each time of back blowing towards the desert air filter;
the magnitudes of M1 and M2 are compared and it is determined whether M1 is less than the failure threshold.
In some embodiments, the data processing includes comparing the sizes of P1n and P2 n.
The beneficial effect that technical scheme that this application provided brought includes:
the embodiment of the application provides an automatic maintenance verification device and method for an air filter. And the values of dust amount and air inlet resistance value in the desert air filter before and after maintenance are measured and compared, so as to judge and verify whether the automatic maintenance of the desert air filter is effective or not.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
Fig. 1 is a schematic view of an air filter automatic maintenance verification device according to an embodiment of the present application.
In the figure: 1. an air filter in desert; 2. a dust ejector; 3. a blowing device; 301. an air reservoir; 302. an air tube; 303. a valve; 4. a dust collector; 5. a resistance measuring device; 501. a first pressure measuring pipe; 502. a second pressure measuring tube; 503. and a pressure gauge.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all 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 application.
The air filter needs maintenance after a period of use, the end cover and the main filter element are detached, and compressed air is blown from inside to outside to clean dust attached to the filter element. The pressure of compressed air can not be too high, otherwise easily damage paper filter core, but the user generally is difficult to obtain compressed air, and the direction of blowing has strict requirement simultaneously, and the maintenance operation requirement is more and loaded down with trivial details, and misoperation can cause the damage to the filter core.
Therefore, part of the main engine plants or air filter suppliers design an air filter system with an automatic maintenance function, the air filter back-blowing system is externally connected with power and high-pressure gas to generate power for driving dust and impurity discharge, the separated dust and impurity are effectively removed through back-blowing the air filter, active dust removal is realized, maintenance-free maintenance of the air filter is realized, the defects of non-standard conventional maintenance operation, uncontrollable air pressure, excessive maintenance and the like are avoided, the reliability and the convenience of maintenance are improved, and the use cost of a user is reduced.
However, it is difficult to verify the maintenance effect of the air filter blowback system through the actual driving of the vehicle, and there is no corresponding device to verify whether the automatic maintenance function of the air filter is really effective, so that a problem of how to verify the actual effect of the air filter with the automatic maintenance function is urgently needed to be solved.
The embodiment of the application provides an empty automatic maintenance verification device that strains, it can solve and be difficult to verify among the correlation technique the technical problem of the maintenance effect of empty filter blowback system to the empty filter.
An empty automatic maintenance verification device that strains for the operational environment of the empty filter 1 in simulation desert, and simulate the automatic maintenance of the empty filter 1 in desert, it includes:
a dust injector 2 for blowing dust into the desert air filter 1 from an air inlet of the desert air filter 1;
the air blowing device 3 is used for blowing air from the air outlet of the desert air filter 1 to the desert air filter 1;
a dust collector 4 for collecting dust blown out from the desert air filter 1;
and the resistance measuring device 5 is used for measuring the air intake resistance of the desert air filter 1.
Referring to fig. 1, the automatic air filter maintenance verification device simulates an operation environment of an air filter 1 in a desert and performs an automatic maintenance process on the air filter 1 in the desert after the air filter is operated for a period of time. It comprises a dust ejector 2, a blowing device 3, a dust collector 4 and a resistance measuring device 5.
During the test, the dust injector 2 is arranged to be aligned with the air inlet of the desert air filter 1 and injects dust towards the air inlet of the desert air filter 1, so that the dust is blown into the desert air filter 1, and the actual operation environment of the desert air filter 1 is simulated. In the embodiment, the dust is ISO A2 dust for test, and is sprayed to the air inlet of the desert air filter 1 according to the specified ash adding concentration and speed according to the conventional methodThe dust concentration is 30mg/m under the working condition3. The dust ejector 2 operates to simulate the actual working environment of the desert air filter 1.
After the desert air filter 1 runs for a period of time, the automatic maintenance of the desert air filter 1 is simulated. The air blowing device 3 is arranged in alignment with an air outlet of the desert air filter 1, and the air blowing device 3 blows air to an internal filter element of the desert air filter 1, so that the automatic maintenance process of the desert air filter is simulated. When the blowing device 3 is operated, the desert air filter 1 is subjected to back blowing.
Dust collector 4 communicates with the empty filter 1 in desert, at the automatic maintenance in-process of the empty filter 1 in simulation desert, along with gas blowing of gas blowing device 3, dust on the filter core in the empty filter 1 in desert is blown to in dust collector 4, collect the dust by dust collector 4, and through measuring the weight of dust collector 4 before and after the empty filter 1 in desert blows, with this change of presuming the filter core surface dust collection volume in the empty filter 1 in desert, can judge the blowback effect of the empty filter 1 in desert, judge the automatic maintenance effect of the empty filter 1 in desert promptly.
So arranged, the device is used for simulating the operation environment of the desert air filter 1 and simulating the automatic maintenance process of the desert air filter 1. And the dust amount and the intake resistance value of the desert air filter 1 before and after maintenance are measured and compared, so as to judge and verify whether the automatic maintenance of the desert air filter 1 is effective or not.
During the test, the weight of the dust collector 4 and the air intake resistance value of the desert air filter 1 are measured. And then the dust injector 2 is opened, the desert air filter 1 is started and operated for a period of time, so that the normal working state of the desert air filter 1 is simulated, then the dust injector 2 is closed, and the weight of the dust collector 4 and the air inlet resistance value of the desert air filter 1 are measured. And (3) closing the desert air filter 1, starting the blowing device 3, operating for a period of time, and measuring the weight of the dust collector 4 and the air inlet resistance value of the desert air filter 1 after the back blowing is finished. The test can be repeated for a plurality of times, so that a plurality of groups of test data can be obtained. The weight of the dust collector 4 before and after dust adding and before and after back flushing and the air inlet resistance of the desert air filter 1 are analyzed, whether back flushing has a maintenance effect on the desert air filter 1 can be known, and whether the automatic maintenance process of the desert air filter 1 is effective can be known. When the air inlet resistance of the desert air filter 1 is measured, the desert air filter 1 needs to be opened.
Optionally, the automatic maintenance verification device for air filter further comprises a weight measuring piece, and the dust collector 4 knows the weight change of the dust collector through the weight measuring piece.
Wherein the dust collector 4 is placed on the weight measuring member, and the weight of the dust collector 4 is measured by the weight measuring member in real time. The weight measuring part comprises a gravimeter or a platform balance.
Set up like this, survey the setting of heavy piece, be convenient for in time measure the weight of dust collector 4 for the test process is compacter, and test efficiency is higher, changes of knowing adnexed dust volume on the empty filter 1 inside filter core in desert more.
Optionally, the air blowing device 3 comprises:
an air pipe 302 which is communicated with an air outlet of the desert air filter 1;
an air reservoir 301 which is communicated with the air pipe 302 so as to blow air into the desert air filter 1 through the air pipe 302;
a valve 303 disposed on the air tube 302.
Referring to fig. 1, the insufflation apparatus 3 includes an air tube 302, an air cartridge 301, and a valve 303. One end of the air pipe 302 is communicated with the air outlet of the air storage cylinder 301, the other end of the air pipe 302 is communicated with the air outlet of the desert air filter 1, the valve 303 is arranged on the air pipe 302, and whether to blow dust into the desert air filter 1 can be controlled by opening and closing the valve 303.
The gas cylinder 301 is filled with high-pressure gas of 600kpa, and during air blowing, the gas cylinder 301 is used as a gas source to blow air towards the desert air filter 1, so that stable gas is provided for the desert air filter 1.
By the arrangement, when the desert air filter 1 is subjected to back blowing, the air storage cylinder 301 is used as an air source to provide stable back blowing air for the desert air filter 1, so that the actual automatic maintenance process of the desert air filter 1 is simulated.
Optionally, the resistance measuring device 5 comprises:
a first pressure measuring pipe 501 which is communicated with an air inlet of the desert air filter 1;
a second pressure measuring pipe 502 which is communicated with the air outlet of the desert air filter 1;
and the pressure gauge 503 is arranged between the first pressure measuring pipe 501 and the second pressure measuring pipe 502 to display the air inlet resistance of the desert air filter 1.
Referring to fig. 1, the resistance measuring device 5 is used for measuring the air intake resistance value of the desert air filter 1, so as to obtain the air intake resistance change before and after the back blowing. The resistance measuring device 5 comprises a first pressure measuring tube 501, a second pressure measuring tube 502 and a pressure gauge 503. One end of the first pressure measuring pipe 501 is communicated with an air inlet of the desert air filter 1, air enters the desert air filter 1 through the first pressure measuring pipe 501, and the dust ejector 2 is aligned with one end, deviating from the desert air filter 1, of the first pressure measuring pipe 501, so that dust enters the desert air filter 1 through the first pressure measuring pipe 501.
One end of the second pressure measuring pipe 502 is communicated with the air outlet of the desert air filter 1. The gas in the desert air filter 1 is discharged through the second piezometer tube 502. The air pipe 302 of the blowing device 3 is communicated with a second pressure measuring pipe 502, so that the blowing device 3 is communicated with the air outlet of the desert air filter 1 through the second pressure measuring pipe 502, and the air of the blowing device 3 is blown into the desert air filter 1 through the second pressure measuring pipe 502.
The pressure gauge 503 is respectively connected with the first pressure measuring pipe 501 and the second pressure measuring pipe 502, so as to measure the air intake resistance value of the desert air filter 1.
Another embodiment of the present application provides an air filter automatic maintenance verification method, based on the above air filter automatic maintenance verification apparatus, including the following steps:
measuring the initial air intake resistance P0 of the desert air filter 1 and the initial weight M0 of the dust collector 4;
adding ash into the desert air filter 1 for n times, and recording the air inlet resistance P1n of the desert air filter 1 and the weight M1n of the dust collector 4 after each ash addition;
carrying out back flushing operation on the desert air filter 1 after adding ash to the desert air filter 1 each time, and recording air inlet resistance P2n of the desert air filter 1 and weight M2n of the dust collector 4 after back flushing operation each time;
and (6) data arrangement.
Wherein, the automatic maintenance and verification method for air filter includes the following steps 101-104;
101. the initial intake resistance P0 of the desert air filter 1 was measured, and the initial weight M0 of the dust collector 4 was measured.
Wherein, the initial air intake resistance P0 of the desert air filter 1 before test is measured by the resistance measuring device 5, and the initial weight M0 of the dust collector 4 is measured by the weight measuring piece.
102. The desert air filter 1 is grayed n times, and the air intake resistance P1n of the desert air filter 1 and the weight M1n of the dust collector 4 after each graying are recorded.
Wherein, the air inlet resistance P1n of the desert air filter 1 and the weight M1n of the dust collector 4 are recorded after each time of adding ash to the desert air filter 1 for n times by the dust injector 2.
For example, after the first dust addition, the air intake resistance of the desert air filter 1 is recorded as P11, and the weight of the dust collector 4 is recorded as M11; after the second dust addition, the air intake resistance of the desert air filter 1 is recorded as P12, and the weight of the dust collector 4 is recorded as M12; after the third ash addition, the air intake resistance of the desert air filter 1 is recorded as P13, and the weight of the dust collector 4 is recorded as M13; and so on. Data P11, P12, P13 … P1n of the air intake resistance of a group of desert air filters 1 and data M11, M12, M13 … M1n of the weight of a group of dust collectors 4 were obtained.
103. And (3) carrying out back flushing operation on the desert air filter 1 after adding ash to the desert air filter 1 each time, and recording the air inlet resistance P2n of the desert air filter 1 and the weight M2n of the dust collector 4 after each back flushing operation.
After the air filter 1 in the desert is added with dust each time, the air filter 1 in the desert needs to be subjected to back blowing operation through the blowing device 3 so as to simulate the automatic maintenance process of the air filter 1 in the desert. After each blowback operation, the air intake resistance P2n of the desert air filter 1 and the weight M2n of the dust collector 4 are recorded. For example, after the first blowback operation, the intake resistance of the desert air filter 1 is recorded as P21, and the weight of the dust collector 4 is recorded as M21; after the second blowback operation, the air intake resistance of the desert air filter 1 is recorded as P22, and the weight of the dust collector 4 is recorded as M22; after the first blow-back operation, the air intake resistance of the desert air filter 1 was recorded as P23, and the weight of the dust collector 4 was recorded as M23. And so on. Data P21, P22, P23 … P2n of the air intake resistance of a group of desert air filters 1 and data M21, M22, M23 … M2n of the weight of a group of dust collectors 4 were obtained.
104. And (6) data arrangement.
The obtained data are processed, the change of the dust attached to the filter element in the desert air filter 1 before and after back blowing can be visually obtained by comparing M1n with M2n, the change of the air inlet resistance of the desert air filter 1 before and after back blowing can be visually obtained by comparing P1n with P2n, if M2n is smaller than M1n in the same turn, the effect of discharging the dust in the desert air filter 1 by back blowing is proved, and the effect of maintaining the desert air filter 1 by back blowing is also proved if P2n is smaller than P1 n.
Optionally, before performing the graying in the desert air filter 1 for n times, the method further includes:
the weight and time for adding ash into the desert air filter 1 each time are preset to simulate the ash feeding amount of the desert air filter 1 in 12-hour continuous work.
Wherein, before carrying out the ash-adding n times towards in the empty filter 1 in desert, still include: the weight and time for adding ash into the desert air filter 1 each time are preset to simulate the ash feeding amount of the desert air filter 1 in 12-hour continuous work.
In the present embodiment, the dust concentration sprayed from the dust sprayer 2 is 30mg/m3And the rated flow of the desert air filter 1 is 1680m3H is used as the reference value. The actual air inlet flow of the desert air filter 1 is according to 70 percent of rated flow and 60 percent of pre-filtering efficiency in the conventional processThe filter operates for 2 hours under the working condition, and the ash inlet amount of the air filter element is as follows: 1680 × 2 × 0.7 × 30 (1-0.6) ═ 28.2 g. The single ash addition was corrected for laboratory measurement capability and operability, and was 28g of ash per minute. The ash 28 x 6-168 g can be added in 6 minutes, namely the amount of the ash 168g added in 6 minutes is equivalent to the total amount of the ash entering the desert air filter after the desert air filter vehicle actually works continuously for 12 hours. The ash intake of the desert air filter 1 during the actual working time of 12 hours was simulated by a 6 minute ash charging process.
The maintenance period of the desert air filter 1 is 1000 hours, namely the desert air filter 1 needs to be detached for maintenance after 1000 hours of work of the desert air filter 1. In this embodiment, each time the ash adding operation is to simulate the desert air filter 1 to work for 12 hours, and when the total number n of the ash adding operation is 83, the desert air filter 1 can work for 1000 hours in practice.
Optionally, the back-blowing operation into the desert air filter 1 includes:
and continuously and discontinuously opening the blowing device 3 for 6 times to blow back the desert air filter 1.
Wherein, the operation of blowback towards in the empty filter 1 in desert includes:
and continuously and discontinuously opening the blowing device 3 for 6 times to blow back the desert air filter 1. During the back flushing operation, the valve 303 is continuously and discontinuously opened and closed for six times, so that the high-pressure gas in the gas storage tank 301 is blown into the desert air filter 1 through the gas pipe 302, the back flushing operation is carried out on the desert air filter 1, and the automatic maintenance process of the desert air filter 1 is simulated.
Optionally, the data processing includes: calculating resistance recoveries R1 and R2;
R1＝(P0/P1n)*100％，R2＝(P0/P2n)*100％；
wherein R1 and R2 respectively represent resistance resilience of the desert air filter 1 after each time of ash addition and each time of back blowing towards the desert air filter 1, and whether R1 and R2 are in a usable range is judged.
Wherein the data processing comprises: calculating resistance recoveries R1 and R2;
R1＝(P0/P1n)*100％，R2＝(P0/P2n)*100％；
wherein R1 and R2 respectively represent resistance resilience of the desert air filter 1 after each time of ash addition and each time of back blowing towards the desert air filter 1, and whether R1 and R2 are in a usable range is judged.
The resistance restorability reflects whether the filter element in the desert air filter 1 is intact, and whether the air inlet resistance of the desert air filter 1 is reduced by back flushing operation is judged, so that the automatic maintenance effect is verified.
R1 is the resistance resilience of the desert air filter 1 after ash addition, and R2 is the resistance resilience of the desert air filter 1 after blowback. During the test, the ranges of R1 and R2 were within the usable range, i.e., the test was continued, where the usable range included 80% to 120%. If R1 and R2 are outside the usable range, the test is stopped. Wherein, when the value of R1 or R2 is less than 80%, the reaction blowback effect is poor, and the filter element of the desert air filter 1 still adheres to more dust. When the value of R1 or R2 is more than 120%, damage is generated to the filter element of the desert air filter 1 during reaction blowback operation, and therefore, when the value of R1 or R2 is not between 80% and 120%, the desert air filter 1 cannot be automatically maintained. When the numerical values of R1 and R2 are between 80% and 120% all the time, the desert air filter 1 with the back-blowing automatic maintenance function can be verified to have the automatic maintenance effect.
Optionally, the data processing comprises calculation of accumulated dust amounts M1 and M2 on the surface of the filter element inside the desert air filter 1;
M1＝M1n-M0，M2＝M2n-M0；
wherein M1 and M2 respectively represent the dust amount accumulated on the surface of the filter element in the desert air filter 1 after each time of ash addition and each time of back blowing towards the desert air filter 1.
The magnitudes of M1 and M2 are compared and it is determined whether M1 is less than the failure threshold.
Wherein, the data processing also comprises the calculation of the accumulated dust amounts M1 and M2 on the surface of the filter element inside the desert air filter 1;
M1＝M1n-M0，M2＝M2n-M0；
wherein M1 and M2 respectively represent the dust amount accumulated on the surface of the filter element in the desert air filter 1 after each time of ash addition and each time of back blowing towards the desert air filter 1. Each time the desert air filter 1 is grayed out, a value of M1 can be obtained, and as the number of times increases, a plurality of changes in the value of M1 can be analyzed to observe changes in the value of M1 as the number of graying increases. After each time of back blowing operation on the desert air filter 1, a value of M2 can be obtained, and as the number of back blowing times increases, the change of a plurality of values of M2 can be analyzed to observe the change of the value of M2 as the number of ash adding back blowing operations increases.
The sizes of M1 and M2 directly reflect the weight of dust accumulated on the surface of the filter element of the desert air filter 1(2) and the variation of the dust accumulated on the surface of the filter element of the desert air filter 1 after each ash adding and back blowing. If the automatic maintenance process is not effective, the index value is linearly increased, which is equivalent to the cumulative ash addition amount, and if the automatic maintenance process is effective, the values of M1 and M2 are always smaller than the failure threshold value.
The magnitudes of M1 and M2 are compared and it is determined whether M1 is less than the failure threshold.
And in the same test run, comparing the M1 value after ash addition with the M2 value after back blowing, if M1 is equal to M2, the reaction back blowing operation has no maintenance effect, and if M1 is greater than M2, the reaction back blowing operation can blow out the dust in the desert air filter 1, so that the maintenance effect is achieved. The desert air filter 1 with the back flushing automatic maintenance function can be verified to have the automatic maintenance effect.
The M1 value is always greater than or equal to the M2 value, so that whether the M1 is less than the failure threshold value or not is judged, and whether the automatic maintenance of the desert air filter 1 is effective or not can be judged. In this embodiment, the failure threshold is 250 g. In the process of multiple tests, M1 is always less than 250g, and the desert air filter 1 with the back-blowing automatic maintenance function can be verified to have the automatic maintenance effect.
Optionally, the data processing comprises comparing the sizes of P1n and P2 n.
Wherein the data processing comprises comparing the sizes of P1n and P2 n.
In the same test run, the air intake resistance of the desert air filter 1 after ash addition is P1n, and the air intake resistance of the desert air filter 1 after blowback is P2 n. As the amount of dust accumulated on the filter element of the desert air filter 1 increases, the intake resistance value increases. The values of P1n and P2n thus reflect the automatic maintenance effect of the desert air filter 1. If the back flushing of the desert air filter 1 does not have the maintenance effect (namely the automatic maintenance effect of the desert air filter 1 is ineffective), the sizes of the P1n and the P2n tend to be consistent.
If the air filter 1 needs any maintenance measures, the air intake resistance value of the air filter 1 is increased by 4kpa relative to the initial air intake resistance value when the air filter needs maintenance.
In this embodiment, when verifying whether the back flushing process has a maintenance effect on the desert air filter 1, if the increment of P1n and P2n relative to P0 is always less than 2kpa, it can be verified that the desert air filter 1 having the back flushing automatic maintenance function has an automatic maintenance effect.
In the description of the present application, it should be noted that the terms "upper", "lower", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, which are only for convenience in describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed in a specific orientation, and operate, and thus, should not be construed as limiting the present application. Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "connected" are intended to be inclusive and mean, for example, that they may be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present application can be understood by those of ordinary skill in the art as appropriate.
It is noted that, in the present application, relational terms such as "first" and "second", and the like, are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The above description is merely exemplary of the present application and is presented to enable those skilled in the art to understand and practice the present application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. An empty automatic maintenance verifying attachment that strains for the operational environment of simulation desert air cleaner (1), and simulate the automatic maintenance of desert air cleaner (1), it includes:
a dust injector (2) for blowing dust into the desert air filter (1) from an air inlet of the desert air filter (1);
the air blowing device (3) is used for blowing air into the desert air filter (1) from an air outlet of the desert air filter (1);
a dust collector (4) for collecting dust blown out from the desert air filter (1);
and the resistance measuring device (5) is used for measuring the air inlet resistance of the desert air filter (1).
2. The air filter automatic maintenance verification device according to claim 1, further comprising a weight measuring member, wherein the dust collector (4) is informed of the change of its own weight by the weight measuring member.
3. The air filter automatic maintenance verification device according to claim 1, wherein the air blowing device (3) comprises:
the air pipe (302) is communicated with an air outlet of the desert air filter (1);
an air reservoir (301) communicated with the air pipe (302) to blow air into the desert air filter (1) through the air pipe (302);
a valve (303) disposed on the gas tube (302).
4. The air filter automatic maintenance verification device according to claim 1, wherein the resistance measurement device (5) comprises:
the first pressure measuring pipe (501) is communicated with an air inlet of the desert air filter (1);
the second pressure measuring pipe (502) is communicated with an air outlet of the desert air filter (1);
and the pressure gauge (503) is arranged between the first pressure measuring pipe (501) and the second pressure measuring pipe (502) and is used for displaying the air inlet resistance of the desert air filter (1).
5. An automatic maintenance verification method for an air filter according to any one of claims 1 to 4, comprising the steps of:
measuring the initial air intake resistance P0 of the desert air filter (1) and measuring the initial weight M0 of the dust collector (4);
adding ash into the desert air filter (1) for n times, and recording the air inlet resistance P1n of the desert air filter (1) and the weight M1n of the dust collector (4) after each ash addition;
carrying out blowback operation towards the desert air filter (1) after adding ash to the desert air filter (1) each time, and recording the air inlet resistance P2n of the desert air filter (1) and the weight M2n of the dust collector (4) after each blowback operation;
and (6) data arrangement.
6. The air filter automatic maintenance verification method according to claim 5, further comprising, before the ashing is performed n times in the desert-oriented air filter (1):
the weight and time for adding ash into the desert air filter (1) each time are preset so as to simulate the ash feeding amount of the desert air filter (1) in 12 hours of continuous work.
7. The air filter automatic maintenance verification method according to claim 6, wherein the back-blowing operation into the desert air filter (1) comprises:
and continuously and discontinuously opening the blowing device (3) for 6 times to blow back the desert air filter (1).
8. The air filter automatic maintenance verification method according to claim 5, wherein the data processing includes: calculating resistance recoveries R1 and R2;
R1＝(P0/P1n)*100％，R2＝(P0/P2n)*100％；
wherein R1 and R2 respectively represent resistance resilience of the desert air filter (1) after each time of ash addition and each time of back blowing towards the desert air filter (1), and whether R1 and R2 are in a usable range is judged.
9. The air filter automatic maintenance verification method according to claim 5, wherein the data processing comprises calculation of accumulated dust amounts M1 and M2 on the surface of a filter element inside the desert air filter (1);
M1＝M1n-M0，M2＝M2n-M0；
wherein M1 and M2 respectively represent the dust quantity accumulated on the surface of the filter element in the desert air filter (1) after each time of ash addition and each time of back blowing towards the desert air filter (1);
the magnitudes of M1 and M2 are compared and it is determined whether M1 is less than the failure threshold.
10. The air filter automatic maintenance verification method according to claim 5, wherein the data processing includes comparing the sizes of P1n and P2 n.
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