CN107998760B - Monitoring method and system for use condition of combined filter - Google Patents

Monitoring method and system for use condition of combined filter Download PDF

Info

Publication number
CN107998760B
CN107998760B CN201711267814.1A CN201711267814A CN107998760B CN 107998760 B CN107998760 B CN 107998760B CN 201711267814 A CN201711267814 A CN 201711267814A CN 107998760 B CN107998760 B CN 107998760B
Authority
CN
China
Prior art keywords
filter
fan
gamma
dust holding
particle size
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.)
Active
Application number
CN201711267814.1A
Other languages
Chinese (zh)
Other versions
CN107998760A (en
Inventor
周鹏飞
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.)
Beijing Jinghai Technology Co ltd
Original Assignee
Beijing Jinghai Technology 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 Beijing Jinghai Technology Co ltd filed Critical Beijing Jinghai Technology Co ltd
Priority to CN201711267814.1A priority Critical patent/CN107998760B/en
Publication of CN107998760A publication Critical patent/CN107998760A/en
Application granted granted Critical
Publication of CN107998760B publication Critical patent/CN107998760B/en
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Images

Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/56—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition
    • B01D46/62—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours with multiple filtering elements, characterised by their mutual disposition connected in series
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/42—Auxiliary equipment or operation thereof
    • B01D46/44—Auxiliary equipment or operation thereof controlling filtration
    • B01D46/46—Auxiliary equipment or operation thereof controlling filtration automatic
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
    • B01D—SEPARATION
    • B01D46/00—Filters or filtering processes specially modified for separating dispersed particles from gases or vapours
    • B01D46/88—Replacing filter elements
    • 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
    • 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
    • G01N2015/084—Testing filters

Landscapes

  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Dispersion Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Health & Medical Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Analytical Chemistry (AREA)
  • Biochemistry (AREA)
  • General Health & Medical Sciences (AREA)
  • General Physics & Mathematics (AREA)
  • Immunology (AREA)
  • Pathology (AREA)
  • Filtering Of Dispersed Particles In Gases (AREA)

Abstract

The invention relates to a monitoring method and a system for the use condition of a combined filter, wherein the method comprises the steps of (1) collecting the concentration of particulate matters monitored by a particulate matter sensor and the rated dust holding capacity of each stage of filter in the combined filter; (2) calculating the accumulated weighing filtering efficiency of each filter in the combined filter; (3) calculating the current accumulated dust holding capacity of each filter according to the accumulated weighing filtering efficiency of each filter and the accumulated conveying air capacity of the fan; (4) and comparing the current accumulated dust holding capacity of each filter with the rated dust holding capacity of each filter to obtain the service condition of each filter. The invention utilizes the parameters of the concentration of the particles, the efficiency and the dust holding capacity of the filter, the rotating speed of the variable speed fan, the performance curve of the fan and the like to obtain the service condition of each filter through the analysis and calculation of software, and displays the service condition of each filter through a visual interface.

Description

Monitoring method and system for use condition of combined filter
Technical Field
The invention belongs to the technical field of air purification, and particularly relates to a method and a system for monitoring the use condition of a combined filter.
Background
The current service condition monitoring of the filter generally adopts a differential pressure gauge to monitor the differential pressure on two sides of the filter, along with the use of equipment, the resistance of the filter is gradually increased, the differential pressure on two sides of the filter is increased, and when the resistance of the filter is increased to one time of the initial resistance, the filter is required to be replaced when the service life of the filter is prolonged.
However, the differential pressure sensor is high in manufacturing cost, and for an air conditioner or a purifier, a primary filtering mode, a medium filtering mode and a high filtering mode can be generally adopted, and because the primary resistance and the final resistance of each stage of filter are different, the differential pressure sensor is required to be arranged on each stage of filter for respective monitoring, so that the product cost is increased invisibly by adopting the mode, and the product complexity is further increased.
Disclosure of Invention
In view of the above, the present invention is directed to overcome the deficiencies of the prior art and to provide a method and a system for monitoring the usage of a combination filter. The invention can realize the real-time monitoring of the use condition of each stage of filter, and improves the use experience of users while reducing the product cost.
In order to achieve the purpose, the invention adopts the following technical scheme:
in a method of monitoring usage of a modular filter, the improvement comprising: the method comprises the following steps
(1) Collecting the concentration of the particulate matters monitored by a particulate matter sensor and the rated dust holding capacity of each stage of filter in the combined filter;
(2) calculating the accumulated weighing filtering efficiency of each filter in the combined filter;
(3) calculating the current accumulated dust holding capacity of each filter according to the accumulated weighing filtering efficiency of each filter and the accumulated conveying air capacity of the fan;
(4) and comparing the current accumulated dust holding capacity of each filter with the rated dust holding capacity of each filter to obtain the service condition of each filter.
Further, the particulate matter sensor is the particulate matter sensor of unification more, the particulate matter concentration PM of unifying more than the particulate matter sensor can monitor two kinds or two kinds scope simultaneouslyα、PMβ、PMγ、PMφ……；
The detection results are a, b, c, d … …, unit ug/m3Namely:
the concentration of the particulate matter with the particle size less than or equal to α mu m is α mu g/m3；
the concentration of the particles with the particle size less than or equal to β mu m is b mu g/m3；
The concentration of the particulate matters with the particle size not more than gamma mu m is c mu g/m3；
The concentration of the particles with the particle diameter less than or equal to phi mu m is d mu g/m3；
……
in the formula, the value of the particle size α of the particulate matter needs to satisfy the condition that the gravimetric concentration of the particulate matter less than or equal to α mu m approaches to the total gravimetric concentration of the particulate matter in the air infinitely, namely PMαthe value a → M, M is the total weight concentration of the particulate matters in the air, the particle size relationship of the particulate matters is that alpha is more than β and gamma is more than phi, the particle sizes of the particulate matters are classified according to the size, the classified particulate matters are classified and filtered by a filter, and the particle size range of the filtered particulate matters is consistent with the particle size range of the particulate matters measured by a sensor.
Further, the weighting efficiency of each filter in the step (2) comprises
Filter Fafor particle size interval [ β, alpha ]]the weight-counting efficiency of the [ gamma, β ] and [ phi, gamma ] filters is eta in sequencea 1、ηa2、ηa3；
Filter Fbfor particle size interval [ β, alpha ]]the weight-counting efficiency of the [ gamma, β ] and [ phi, gamma ] filters is eta in sequenceb1、ηb2、ηb3；
Filter Fcfor particle size interval [ β, alpha ]]the weight-counting efficiency of the [ gamma, β ] and [ phi, gamma ] filters is eta in sequencec1、ηc2、ηc3；
Wherein the filtration level is F from low to high in sequencea，Fb，Fc。
Further, the accumulative weighting filtering efficiency of each filter in the step (2) comprises
Filter Fafor particle size interval [ β, alpha ]]the cumulative weight-counting filtration efficiency of [ gamma, β ] and [ phi, gamma ] is eta in sequencea1、ηa2、ηa3；
Filter Fa，Fbfor particle size interval [ β, alpha ]]the serial cumulative gravimetric filtration efficiency of [ gamma, β ] and [ phi, gamma ] is sequentially
1-(1-ηa1)(1-ηb1)
1-(1-ηa2)(1-ηb2)
1-(1-ηa3)(1-ηb3)；
Filter Fa，Fb，Fcfor particle size interval [ β, alpha ]]the serial cumulative gravimetric filtration efficiency of [ gamma, β ] and [ phi, gamma ] is sequentially
1-(1-ηa1)(1-ηb1)(1-ηc1)
1-(1-ηa2)(1-ηb2)(1-ηc2)
1-(1-ηa3)(1-ηb3)(1-ηc3)。
Further, the step (3) comprises
FaThe accumulated dust holding capacity is:
ma＝[(a-b)×Qηa1+(b-c)×Qηa2+(c-d)×Q)ηa3]·ε1；
Fbthe accumulated dust holding capacity is:
Figure BDA0001494933760000031
Fcthe accumulated dust holding capacity is:
Figure BDA0001494933760000032
in the formula, maAs a filter FaCurrent cumulative dust holding amount, mbAs a filter FbCurrent cumulative dust holding amount, mcAs a filter FcThe current accumulated dust holding capacity, Q is the accumulated conveying air quantity of the fan in the use process, epsilon1For the filter F to be usedaDust holding amount correction coefficient of2In use, FbDust holding amount correction coefficient of3For the filter F to be usedcThe dust holding amount correction coefficient.
Further, the determination of the cumulative air volume Q is:
Figure BDA0001494933760000041
in the formula, qiIn the time period of i, the rotating speed is RdiThe air supply quantity of the time fan in unit time.
Further, collecting the rotating speed information of the fan according to the performance curve of the fan at different rotating speeds, and calculating the rotating speed Rd according to the relationship between the rotating speed and the wind quantityiAir supply quantity per unit time of time-varying fan, and air supply quantity qiIs varied within a range qa≤qi≤qbAnd the initial resistance of the filter, and can determine the rotating speed interval Rd of the faniIs Rda≤Rdi≤Rdb；
In the formula, qaTo a minimum air volume, qbThe rotation speed at maximum air volume, RdaIs the rotational speed at minimum air volume, RdbThe rotating speed is the rotating speed at the maximum air quantity.
Furthermore, according to the fact that the air quantity is in direct proportion to the rotating speed, the air pressure is in direct proportion to the square of the rotating speed, and the power is in direct proportion to the third power of the rotating speed; the performance curve of the fan at any rotating speed can be obtained according to the known performance curve of the fan at the rated rotating speed.
Further, in the above-mentioned case,
Figure BDA0001494933760000042
Figure BDA0001494933760000043
η2＝η1；
wherein, Rd1,Rd2Is the fan speed, L1,L2Is the air volume, P1,P2is the wind pressure of the fan, η1，η2The fan efficiency;
any working point A on the curve of the rated speed performance of the known fan1Finding out the corresponding L of the operating pointA1And PA1；
Calculating A1Point A at n times rated speed2L of a dotA2And PA2；
LA2＝nLA1；
PA2＝n2PA1；
n≤1；
B is taken from a rated speed performance curve1，C1… …, working point B under n times of rated speed is obtained according to the similarity law2，C2… …, curve A smoothly2，B2，C2… …, obtaining a fan performance curve under the condition of n;
and similarly, the fan performance curves at various rotating speeds can be converted by changing the n value.
The present invention also provides a monitoring system for combined filter usage, the improvement comprising: the system comprises a singlechip, a display screen, a combined filter, an all-in-one particulate matter sensor arranged at one end of the combined filter and a variable speed fan arranged at the other end of the combined filter;
the combined filter adopts two or more than two stages of filter combinations with different levels, and the filtering levels are arranged from low to high in sequence;
the all-in-one particulate matter sensor simultaneously monitors the concentration of particulate matter in two or more ranges;
the single chip microcomputer is respectively and electrically connected with the all-in-one particle sensor, the variable speed fan and the display screen;
the single chip microcomputer collects monitoring information of the all-in-one particulate matter sensor and information of the variable speed fan, the monitoring conditions of all levels of filters obtained through calculation are displayed through a display screen, and the monitoring information comprises particulate matter concentration in each particle size range.
The invention adopts the technical proposal that the invention adopts the technical proposal,
according to the invention, a differential pressure sensor is not used, on the basis of not increasing the original hardware setting of the purifier or the air conditioner, the use condition of each filter is obtained by analyzing and calculating parameters such as the concentration of particles, the efficiency and the dust holding capacity of the filter, the rotating speed of a variable speed fan, the performance curve of the fan and the like through software, and the use condition of each filter is displayed through a visual interface.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic flow diagram of a method for monitoring the usage of a modular filter in accordance with the present invention;
FIG. 2 is a schematic diagram of a monitoring system for combined filter usage according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the technical solutions of the present invention will be described in detail below. It is to be understood that the described embodiments are merely exemplary of the invention, and not restrictive of the full scope of the invention. All other embodiments, which can be derived by a person skilled in the art from the examples given herein without any inventive step, are within the scope of the present invention.
The invention provides a method for monitoring the use condition of a combined filter, which comprises the following steps
(1) Collecting the concentration of the particulate matters monitored by a particulate matter sensor and the rated dust holding capacity of each stage of filter in the combined filter;
(2) calculating the accumulated weighing filtering efficiency of each filter in the combined filter;
(3) calculating the current accumulated dust holding capacity of each filter according to the accumulated weighing filtering efficiency of each filter and the accumulated conveying air capacity of the fan;
(4) and comparing the current accumulated dust holding capacity of each filter with the rated dust holding capacity of the filter to obtain the service condition of each filter.
Among the above-mentioned technical scheme, particulate matter sensor is used for monitoring particulate matter concentration, and particulate matter sensor for the particulate matter sensor of unification more, and the particulate matter sensor setting of unification more carries out particulate matter concentration monitoring respectively at the filter at different levels in combination filter front end to combination filter, and particulate matter concentration PM that many unification particulate matter sensor can monitor two kinds or two kinds of above ranges simultaneouslyα、PMβ、PMγ、PMφ……；
The detection results are a, b, c, d … …, unit ug/m3；
Namely:
the concentration of the particulate matter with the particle size less than or equal to α mu m is α mu g/m3；
the concentration of the particles with the particle size less than or equal to β mu m is b mu g/m3；
The concentration of the particulate matters with the particle size not more than gamma mu m is c mu g/m3；
The concentration of the particles with the particle diameter less than or equal to phi mu m is d mu g/m3；
……
wherein, the value of the particle size α of the particulate matters needs to meet the requirement that the gravimetric concentration of the particulate matters less than or equal to α mu m approaches to the total gravimetric concentration of the particulate matters in the air infinitely, namely PMαthe particle concentration is illustrated herein by way of four sets of data only, but those skilled in the art will appreciate that various modifications may be made and equivalents may be substituted for elements therein such as particulate matter without departing from the scope of the invention.
In the above technical solution, the combined filter adopts a combination of two or more stages of filters with different levels, and in this embodiment, the combined filter is set as a primary filter FaIntermediate filtration FbAnd advanced filtration FcEtc. … … with filter levels F in descending order of magnitudea，Fb，Fc……
The weighing efficiency of each filter is as follows:
filter Fafor particle size interval [ β, alpha ]]the weight-calculating efficiency of the filter of [ gamma, β ], [ phi, gamma) … … is eta in turna1、ηa2、ηa3……；
Filter Fbfor particle size interval [ β, alpha ]]the weight-calculating efficiency of the filter of [ gamma, β ], [ phi, gamma) … … is eta in turnb1、ηb2、ηb3……；
Filter Fcfor particle size interval [ β, alpha ]]the weight-calculating efficiency of the filter of [ gamma, β ], [ phi, gamma) … … is eta in turnc1、ηc2、ηc3……；
The accumulated weighing filtering efficiency of each filter is as follows:
filter Fafor particle size interval [ β, alpha ]]the cumulative weight-metering filtration efficiency of [ gamma, β ], [ phi, gamma) … … is eta in turna1、ηa2、ηa3……；
Filter Fa，Fbfor particle size interval [ β, alpha ]]the serial cumulative gravimetric filtration efficiencies of [ gamma, β ], [ phi, gamma ] … … are in turn
1-(1-ηa1)(1-ηb1)
1-(1-ηa2)(1-ηb2)
1-(1-ηa3)(1-ηb3)；
……
Filter Fa，Fb，Fcfor particle size interval [ β, alpha ]]the serial cumulative gravimetric filtration efficiencies of [ gamma, β ], [ phi, gamma ] … … are in turn
1-(1-ηa1)(1-ηb1)(1-ηc1)
1-(1-ηa2)(1-ηb2)(1-ηc2)
1-(1-ηa3)(1-ηb3)(1-ηc3)；
……
In the above technical solution, the filters F at each stage according to the current statea，Fb，Fc… …, the accumulated weight-measuring filtration efficiency and the accumulated air delivery quantity of the fan can calculate the accumulated dust-holding quantity of each filter under the current state as follows:
Fathe accumulated dust holding capacity is
ma＝[(a-b)×Qηa1+(b-c)×Qηa2+(c-d)×Q)ηa3+······]·ε1；
In the formula, maAs a filter FaAccumulating the dust holding capacity currently;
q is the accumulated air delivery quantity of a fan of the system in the using process;
ε1to be used afterIn the process, the dust holding capacity correction coefficient of the filter Fa;
Fbthe accumulated dust holding capacity is
mb＝{(a-b)·Q·[1-(1-ηa1)(1-ηb1)]+(b-c)·Q·[1-(1-ηa2)(1-ηb2)]+(c-d)·Q·[1-(1-ηa3)(1-ηb3)]+······}·ε2-ma；
In the formula, mbAs a filter FbAccumulating the dust holding capacity currently;
q is the accumulated air delivery quantity of a fan of the system in the using process;
ε2in use, FbThe dust holding amount correction coefficient;
Fcthe accumulated dust holding capacity is
mc＝{(a-b)·Q·[1-(1-ηa1)(1-ηb1)(1-ηc1)]+(b-c)·Q·[1-(1-ηa2)(1-ηb2)(1-ηc2)]+(c-d)·Q·[1-(1-ηa3)(1-ηb3)(1-ηc3)]+······}·ε3-ma-mb；
In the formula, mcAs a filter FcAccumulating the dust holding capacity currently;
q is the accumulated air delivery quantity of a fan of the system in the using process;
ε3for the filter F to be usedcThe dust holding amount correction coefficient;
current accumulated dust holding capacity F of each stage of filtera、Fb、Fc… … and the ratio of the rated dust amount of each filter is recorded as the usage of each filter.
Comparing the current accumulated dust holding capacity of each filter with the rated dust holding capacity of each filter to obtain the service condition of each filter; the percentage of remaining or used life of each filter may be obtained.
In the above technical solution, the determination of the cumulative air volume Q:
Figure BDA0001494933760000091
in the formula qiIn the time period of i, the rotating speed is RdiThe air supply quantity of the time fan in unit time.
The single chip microcomputer collects the rotating speed information of the variable speed fan, and the rotating speed is calculated to be Rd according to the relationship between the rotating speed and the wind quantityiThe air supply quantity of the time fan in unit time.
After the rotating speed is changed according to the similarity principle of the fan, the air quantity is in direct proportion to the rotating speed, the air pressure is in direct proportion to the square of the rotating speed, and the power is in direct proportion to the third power of the rotating speed; the performance curve of the fan at any rotating speed can be obtained according to the known performance curve of the fan at the rated rotating speed. The formula is as follows:
Figure BDA0001494933760000092
Figure BDA0001494933760000093
η2＝η1；
wherein,
Rd1,Rd2the rotating speed of the fan;
L1,L2the air quantity is;
P1,P2the wind pressure of the fan is set;
η1，η2the fan efficiency;
firstly, a working condition point A is arbitrarily selected on a curve of the rated speed performance of the known fan1Finding out the corresponding L of the operating pointA1And PA1；
② calculating A1Point A at n times rated speed2L of a dotA2And PA2；
LA2＝nLA1；
PA2＝n2PA1；
n≤1；
B can be taken from the rated speed performance curve by adopting the same formula1，C1… …, working point B under n times of rated speed is obtained according to the similarity law2，C2… …, curve A smoothly2，B2，C2… … are connected to obtain a fan performance curve for n conditions.
And similarly, the fan performance curves at various rotating speeds can be converted by changing the n value.
And a fan performance curve of the fan at different rotating speeds can be drawn through the fan performance test board.
③, according to the performance curve of the fan under different rotating speeds and the air supply quantity qiIs varied within a range qa≤qi≤qbAnd the initial resistance of the filter, and can determine the rotating speed interval Rd of the faniIs Rda≤Rdi≤Rdb；
In the formula qaTo a minimum air volume, qbThe rotating speed is the rotating speed at the maximum air quantity;
Rdais the rotational speed at minimum air volume, RdbThe rotating speed is the rotating speed at the maximum air quantity.
The invention also provides a monitoring system for the use condition of the combined filter, which comprises a singlechip, a display screen, the combined filter, an all-in-one particulate matter sensor arranged at one end of the combined filter and a variable speed fan arranged at the other end of the combined filter;
the combined filter adopts two or more than two stages of filter combinations with different levels, and the filtering levels are arranged from low to high in sequence;
the all-in-one particulate matter sensor simultaneously monitors the concentration of particulate matter in two or more ranges;
the single chip microcomputer is respectively and electrically connected with the all-in-one particle sensor, the variable speed fan and the display screen;
the single chip microcomputer collects monitoring information of the all-in-one particulate matter sensor and information of the variable speed fan, the monitoring conditions of all levels of filters obtained through calculation are displayed through a display screen, and the monitoring information comprises particulate matter concentration in each particle size range.
The single chip microcomputer analyzes and calculates the particle concentration of each particle size range and the air volume information of the variable speed fan, which are acquired by the all-in-one sensor, so as to obtain the service condition of each stage of filter, and the single chip microcomputer displays the real-time monitoring condition of each stage of filter through the display screen.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (9)

1. A method for monitoring usage of a modular filter, comprising: the method comprises the following steps
(1) Collecting the concentration of the particulate matters monitored by a particulate matter sensor and the rated dust holding capacity of each stage of filter in the combined filter;
(2) calculating the accumulated weighing filtering efficiency of each filter in the combined filter;
(3) calculating the current accumulated dust holding capacity of each filter according to the accumulated weighing filtering efficiency of each filter and the accumulated conveying air capacity of the fan;
(4) comparing the current accumulated dust holding capacity of each filter with the rated dust holding capacity of each filter to obtain the service condition of each filter;
wherein, the accumulative weighing filtration efficiency of each filter in the step (2) comprises
Filter Fafor particle size interval [ β, alpha ]]the cumulative weight-counting filtration efficiency of [ gamma, β ] and [ phi, gamma ] is eta in sequencea1、ηa2、ηa3；
Filter Fa，Fbfor particle size interval [ β, alpha ]]the serial cumulative gravimetric filtration efficiency of [ gamma, β ] and [ phi, gamma ] is sequentially
1-(1-ηa1)(1-ηb1)
1-(1-ηa2)(1-ηb2)
1-(1-ηa3)(1-ηb3)；
Filter Fa，Fb，Fcfor particle size interval [ β, alpha ]]the serial cumulative gravimetric filtration efficiency of [ gamma, β ] and [ phi, gamma ] is sequentially
1-(1-ηa1)(1-ηb1)(1-ηc1)
1-(1-ηa2)(1-ηb2)(1-ηc2)
1-(1-ηa3)(1-ηb3)(1-ηc3)。
2. The method of claim 1, wherein the particulate matter sensor is an all-in-one particulate matter sensor capable of monitoring particulate matter concentrations PM in two or more ranges simultaneouslyα、PMβ、PMγ、PMφ……；
The detection results are a, b, c, d … …, respectively, in units of μ g/m3Namely:
the concentration of the particulate matter with the particle size less than or equal to α mu m is α mu g/m3；
the concentration of the particles with the particle size less than or equal to β mu m is b mu g/m3；
The concentration of the particulate matters with the particle size not more than gamma mu m is c mu g/m3；
The concentration of the particles with the particle diameter less than or equal to phi mu m is d mu g/m3；
……
in the formula, the value of the particle size α of the particulate matter needs to meet the condition that the gravimetric concentration of the particulate matter less than or equal to α mu m approaches to the total gravimetric concentration of the particulate matter in the air infinitely, namely PMαthe value a → M, M is the total weight concentration of the particulate matters in the air, the particle size relationship of the particulate matters is that alpha is more than β and gamma is more than phi, the particle sizes of the particulate matters are classified according to the size, the classified particulate matters are classified and filtered by a filter, and the particle size range of the filtered particulate matters is consistent with the particle size range of the particulate matters measured by a sensor.
3. A method of monitoring usage of a modular filter as set forth in claim 1, wherein: the weighting efficiency of each stage of filter in the step (2) comprises
Filter Fafor particle size interval [ β, alpha ]]the weight-counting efficiency of the [ gamma, β ] and [ phi, gamma ] filters is eta in sequencea1、ηa2、ηa3；
Filter Fbfor particle size interval [ β, alpha ]]the weight-counting efficiency of the [ gamma, β ] and [ phi, gamma ] filters is eta in sequenceb1、ηb2、ηb3；
Filter Fcfor particle size interval [ β, alpha ]]the weight-counting efficiency of the [ gamma, β ] and [ phi, gamma ] filters is eta in sequencec1、ηc2、ηc3；
Wherein the filtration level is F from low to high in sequencea，Fb，Fc。
4. A method of monitoring usage of a modular filter as set forth in claim 1, wherein: the step (3) comprises
FaThe accumulated dust holding capacity is:
ma＝[(a-b)×Qηa1+(b-c)×Qηa2+(c-d)×Q)ηa3]·ε1；
Fbthe accumulated dust holding capacity is:
Figure FDA0002416279510000021
Fcthe accumulated dust holding capacity is:
Figure FDA0002416279510000022
in the formula, maAs a filter FaCurrent cumulative dust holding amount, mbAs a filter FbCurrent cumulative dust holding amount, mcAs a filter FcThe current accumulated dust holding capacity, Q is the accumulated conveying air quantity of the fan in the use process, epsilon1For the filter F to be usedaDust holding amount correction coefficient of2To be used atIn the process, the filter FbDust holding amount correction coefficient of3For the filter F to be usedcThe dust holding amount correction coefficient.
5. A method of monitoring usage of a modular filter as set forth in claim 4, wherein: the determination of the accumulated air delivery volume Q is as follows:
Figure FDA0002416279510000031
in the formula, qiIn the time period of i, the rotating speed is RdiThe air supply quantity of the time fan in unit time.
6. A method of monitoring usage of a modular filter as set forth in claim 5, wherein: collecting the rotating speed information of the fan according to the performance curves of the fan at different rotating speeds, and calculating the rotating speed Rd according to the relationship between the rotating speed and the air quantityiAir supply quantity per unit time of time-varying fan, and air supply quantity qiIs varied within a range qa≤qi≤qbAnd the initial resistance of the filter, and can determine the rotating speed interval Rd of the faniIs Rda≤Rdi≤Rdb；
In the formula, qaTo a minimum air volume, qbThe rotation speed at maximum air volume, RdaIs the rotational speed at minimum air volume, RdbThe rotating speed is the rotating speed at the maximum air quantity.
7. A method of monitoring usage of a modular filter as set forth in claim 6, wherein: according to the wind quantity is in direct proportion to the rotating speed, the wind pressure is in direct proportion to the square of the rotating speed, and the power is in direct proportion to the third power of the rotating speed; the performance curve of the fan at any rotating speed can be obtained according to the known performance curve of the fan at the rated rotating speed.
8. A method of monitoring usage of a modular filter as set forth in claim 7, wherein:
Figure FDA0002416279510000032
Figure FDA0002416279510000033
η2＝η1
wherein, Rd1，Rd2Is the fan speed, L1，L2Is the air volume, P1，P2is the wind pressure of the fan, η1，η2The fan efficiency;
any working point A on the curve of the rated speed performance of the known fan1Finding out the corresponding L of the operating pointA1And PA1；
Calculating A1Point A at n times rated speed2L of a dotA2And PA2；
LA2＝nLA1；
PA2＝n2PA1；
n≤1；
B is taken from a rated speed performance curve1，C1… …, working point B under n times of rated speed is obtained according to the similarity law2，C2Using a smooth curve to curve A2，B2，C2… …, obtaining a fan performance curve under the condition of n;
and similarly, the fan performance curves at various rotating speeds can be converted by changing the n value.
9. A monitoring system for combined filter usage, characterized by: the system comprises a singlechip, a display screen, a combined filter, an all-in-one particulate matter sensor arranged at one end of the combined filter and a variable speed fan arranged at the other end of the combined filter;
the combined filter adopts more than two stages of filter combinations with different levels, and the filtering levels are arranged from low to high in sequence;
the all-in-one particulate matter sensor simultaneously monitors the particulate matter concentration in more than two ranges;
the single chip microcomputer is respectively and electrically connected with the all-in-one particle sensor, the variable speed fan and the display screen;
the single chip microcomputer is used for executing the monitoring method of any one of claims 1 to 8, and is configured to collect monitoring information of the all-in-one particulate matter sensor and information of the variable speed fan, and display the monitoring conditions of each stage of filter obtained through calculation through a display screen, wherein the monitoring information comprises particulate matter concentration in each particle size range.
CN201711267814.1A 2017-12-05 2017-12-05 Monitoring method and system for use condition of combined filter Active CN107998760B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201711267814.1A CN107998760B (en) 2017-12-05 2017-12-05 Monitoring method and system for use condition of combined filter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201711267814.1A CN107998760B (en) 2017-12-05 2017-12-05 Monitoring method and system for use condition of combined filter

Publications (2)

Publication Number Publication Date
CN107998760A CN107998760A (en) 2018-05-08
CN107998760B true CN107998760B (en) 2020-06-02

Family

ID=62056498

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201711267814.1A Active CN107998760B (en) 2017-12-05 2017-12-05 Monitoring method and system for use condition of combined filter

Country Status (1)

Country Link
CN (1) CN107998760B (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN111482024A (en) * 2020-06-08 2020-08-04 深圳市鼎信科技有限公司 Control method and device for air purification device and storage medium
WO2022071438A1 (en) * 2020-09-29 2022-04-07 ダイキン工業株式会社 Correcting system, and correcting method
CN113758853B (en) * 2021-09-30 2024-01-19 美埃(中国)环境科技股份有限公司 Method for accurately measuring and calculating performance and service life of filter

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105066288A (en) * 2015-07-14 2015-11-18 中山市完美生活器材科技有限公司 Method for measuring matter in air and device thereof
CN105606512A (en) * 2016-01-13 2016-05-25 东莞市利发爱尔空气净化系统有限公司 Method and device for judging service lives of filter screens
CN107066233A (en) * 2017-04-18 2017-08-18 中山市思诺得环保科技有限公司 A kind of computational methods for changing air purifier filter screen
CN107297109A (en) * 2017-07-25 2017-10-27 广东美的环境电器制造有限公司 Air cleaning facility and its filtration members life-span system for prompting and based reminding method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105066288A (en) * 2015-07-14 2015-11-18 中山市完美生活器材科技有限公司 Method for measuring matter in air and device thereof
CN105606512A (en) * 2016-01-13 2016-05-25 东莞市利发爱尔空气净化系统有限公司 Method and device for judging service lives of filter screens
CN107066233A (en) * 2017-04-18 2017-08-18 中山市思诺得环保科技有限公司 A kind of computational methods for changing air purifier filter screen
CN107297109A (en) * 2017-07-25 2017-10-27 广东美的环境电器制造有限公司 Air cleaning facility and its filtration members life-span system for prompting and based reminding method

Also Published As

Publication number Publication date
CN107998760A (en) 2018-05-08

Similar Documents

Publication Publication Date Title
CN107998760B (en) Monitoring method and system for use condition of combined filter
CN105423499B (en) Purifier monitoring method and device and air purifier
CN104819545B (en) A kind of air purifier and its screen replacing based reminding method and device
CN104374046B (en) The cleaning based reminding method and system of filter screen of air conditioner
CN107158814B (en) A kind of method and air purifier of the prompt of strainer filtering efficient state
CN105180368A (en) Air purifier and replacement reminding method and device of filter net of air purifier
CN108701336A (en) System and method for managing air quality and Analysis server
WO2019041852A1 (en) Method and apparatus for determining service life of filter mesh, purifier, and storage medium
CN107218984B (en) Online diagnosis system and method for natural gas turbine flowmeter
JP2019517917A (en) Method for determining air filter availability
CN203907894U (en) Air quality comparison display device and air purification system comprising air quality comparison display device
WO2019041849A1 (en) Method and apparatus for determining service life of filter mesh, purifier, and storage medium
CN105738263A (en) Detecting device for suspended particles in air, detecting method and early-warning method
CN107687383B (en) Air intake system and control method thereof
CN107655148A (en) Intelligence computation system and method is lost in a kind of clarifier filter screen
WO2019041850A1 (en) Method and apparatus for determining service life of filter mesh, purifier, and storage medium
CN107480399B (en) Method and device for determining service life of filter screen, purifier and computer storage medium
CN113203180A (en) Filter screen filth blockage judging method and air conditioner indoor unit
CN105509227A (en) Air purifier and method for air purifier
CN110871001A (en) Reminding method and device for replacing filter screen of air purifier and air purifier
CN109405225A (en) Air purification method and device
JP6318364B2 (en) Air conditioner and its operation method
CN101418982B (en) Application of mixed gas sensor in air conditioner
CN109908668B (en) Filter element service life prompting system and method
CN207324357U (en) filter screen life detecting device and air purifier

Legal Events

Date Code Title Description
PB01 Publication
PB01 Publication
SE01 Entry into force of request for substantive examination
SE01 Entry into force of request for substantive examination
GR01 Patent grant
GR01 Patent grant