CN110360707B - Method for judging replacement of filter of intelligent fresh air system - Google Patents
Method for judging replacement of filter of intelligent fresh air system Download PDFInfo
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- CN110360707B CN110360707B CN201910650062.XA CN201910650062A CN110360707B CN 110360707 B CN110360707 B CN 110360707B CN 201910650062 A CN201910650062 A CN 201910650062A CN 110360707 B CN110360707 B CN 110360707B
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/30—Control or safety arrangements for purposes related to the operation of the system, e.g. for safety or monitoring
- F24F11/32—Responding to malfunctions or emergencies
- F24F11/39—Monitoring filter performance
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24F—AIR-CONDITIONING; AIR-HUMIDIFICATION; VENTILATION; USE OF AIR CURRENTS FOR SCREENING
- F24F11/00—Control or safety arrangements
- F24F11/50—Control or safety arrangements characterised by user interfaces or communication
- F24F11/61—Control or safety arrangements characterised by user interfaces or communication using timers
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Abstract
The invention discloses a method for judging replacement of an intelligent fresh air system filter, which comprises the following steps: the output power of a fan in the intelligent fresh air system is constant; the method comprises the steps that a simulated dust deposition filter with the end of life is arranged in an intelligent fresh air system which is installed in place in an actual use place, and the rotating speeds of fans under different wind speed gears are obtained to serve as reference rotating speeds; detecting the real-time fan rotating speed of an intelligent fresh air system filled with a new filter in an actual use state; and judging whether the filter needs to be replaced or not according to the change of the rotating speed of the real-time fan and the comparison of the rotating speed with the reference rotating speed corresponding to the current wind speed gear. The method for judging the replacement of the intelligent fresh air system filter solves the problems that in the prior art, the comparison threshold value acquisition time is long, the error of the service life judgment result of the filter is large, the cost is high, the implementation is complex and the like.
Description
Technical Field
The invention relates to the technical field of fresh air systems, in particular to a method for judging replacement of an intelligent fresh air system filter.
Background
After a fresh air system starts to work, filters such as HEPA (high efficiency particulate air) and the like start to accumulate dust slowly, the resistance of the filters is gradually increased along with the increase of dust accumulation, after the dust accumulation reaches a certain degree, the resistance increment corresponding to the increment of the unit dust accumulation amount is multiplied, if the filters such as HEPA and the like are not replaced in time, the air quantity of a fan is influenced by overhigh resistance, and the contents of the filters are easy to mildew or breed bacteria along with the increase of the dust accumulation amount, in addition, dust particles which are blocked originally fall off from a filter screen after the volume is increased and are sent into a room along with an air duct, so that the secondary pollution of indoor air is caused; therefore, after the filter is dusted to a certain degree, the user is reminded in time that the filter replacement operation is necessary.
At present, a judgment method for reminding a user to replace a filter in an intelligent fresh air system mainly comprises a timing method and a pressure difference method, wherein the timing method is greatly influenced by an external environment air quality index, and the problem of large judgment result error exists; the dust accumulation amount is judged scientifically by testing the resistance change of the filter by the differential pressure method, however, the method is complex to realize and high in cost, and the deposition of dust on the static pressure sensor can also affect the detection of the static pressure sensor; in order to solve the above problems, a patent No. CN104848505A applied in china at 4/6/2015 discloses a blockage determination method for a filter device of a fresh air system, a fresh air host and a fresh air system, which simulates a working process of the filter device from brand new to failure in an experimental environment and obtains powers corresponding to different air outlet speeds, wherein the early-stage experiment time is up to several months, the consumed equipment cost and time cost are high, and the experimental environment and the actual use environment are often different, so the method ignores that the length, the diameter variation, the sewing, the elbow and other factors of a fresh air pipeline installed in the actual installation of the fresh air system are different from the experimental environment, the integral resistance of the fresh air system is not only related to the filter, but also closely related to the external dynamic factors, and thus, a threshold value is simply obtained in the experimental environment of a factory before the fresh air system leaves a factory to serve as basic data for comparison, the determination result may have an error.
Disclosure of Invention
The invention aims to overcome the defects or problems in the background art and provides a method for judging the replacement of an intelligent fresh air system filter, so as to solve the problems of long comparison threshold value obtaining time, large error of judging results of the service life of the filter, high cost, complex realization and the like in the prior art.
In order to achieve the purpose, the invention adopts the following technical scheme:
a method for judging replacement of an intelligent fresh air system filter comprises the following steps: the output power of a fan in the intelligent fresh air system is constant; the method comprises the steps that a simulated dust deposition filter with the end of life is arranged in an intelligent fresh air system which is installed in place in an actual use place, and the rotating speeds of fans under different wind speed gears are obtained to serve as reference rotating speeds; detecting the real-time fan rotating speed of an intelligent fresh air system filled with a new filter in an actual use state; and judging whether the filter needs to be replaced or not according to the change of the rotating speed of the real-time fan and the comparison of the rotating speed with the reference rotating speed corresponding to the current wind speed gear.
Further, determining that the filter needs to be replaced satisfies the following condition: the real-time fan rotating speed measured by the intelligent fresh air system at a certain first moment is greater than the reference rotating speed corresponding to the current wind speed gear, and the real-time fan rotating speed measured at any moment in a first period set manually from the first moment is greater than the reference rotating speed corresponding to the current wind speed gear.
Further, when a first period which is set manually from the first moment arrives, a filter replacement prompt is sent.
Further, still include: the corresponding fan rotating speeds under different wind speed gears are collected by adjusting the wind speed gears of the intelligent fresh air system which is installed in place in an actual use place and is provided with the new filter, and the obtained corresponding fan rotating speeds under different wind speed gears are used as standard rotating speeds.
Further, still include: judging whether the filter enters a replacement preparation period or not according to the change of the rotating speed of the real-time fan and the comparison of the rotating speed with a reference rotating speed corresponding to the current wind speed gear; determining that the filter enters a replacement preparation period at least satisfies the following conditions: the real-time fan rotating speed measured by the intelligent fresh air system at a certain second moment is greater than the standard rotating speed corresponding to the current wind speed gear, the absolute value of the difference between the real-time fan rotating speed and the standard rotating speed is greater than or equal to a first value set manually, and the first value is smaller than the absolute value of the difference between the reference rotating speed corresponding to the current wind speed gear and the standard rotating speed corresponding to the current wind speed gear; and the real-time rotating speed of the fan measured at any moment in a second period set manually from the second moment is greater than the standard rotating speed corresponding to the current wind speed gear and less than the reference rotating speed corresponding to the current wind speed gear.
Further, when a second period set manually from the second moment arrives, a filter maintenance prompt is sent out and the replacement preparation period is started.
Further, the output power of a fan in the intelligent fresh air system is adjusted through a motor drive board, wherein the rotating speed of the fan is calculated through P pi/30T n, P is the output power of the fan, T is the torque of the fan, and n is the rotating speed of the fan.
A method for judging replacement of an intelligent fresh air system filter comprises the following steps: the rotating speed of a fan in the intelligent fresh air system is constant; the method comprises the steps that a simulated dust deposition filter with the end of life is arranged in an intelligent fresh air system which is installed in place in an actual use place, and the power under different wind speed gears is obtained to be used as reference power; detecting the real-time fan power of an intelligent fresh air system loaded with a new filter in an actual use state; and judging whether the filter needs to be replaced or not according to the change of the real-time fan power and the comparison of the change of the real-time fan power and the reference power corresponding to the current wind speed gear.
Further, determining that the filter needs to be replaced satisfies the following condition: the real-time fan power measured by the intelligent fresh air system at a certain third moment is smaller than the reference power corresponding to the current wind speed gear, and the real-time fan power measured at any moment in a third period set manually from the third moment is smaller than the reference rotating speed corresponding to the current wind speed gear.
Further, when a third period set by people from the third moment arrives, a filter replacement prompt is sent.
Further, still include: the wind speed gears of the intelligent fresh air system which is installed in place in an actual use place and is provided with the new filter are adjusted, the corresponding fan power under different wind speed gears is collected, and the obtained corresponding fan power under different wind speed gears is used as standard power.
Further, still include: judging whether the filter enters a replacement preparation period or not according to the change of the rotating speed of the real-time fan and the comparison of the change of the rotating speed of the real-time fan and the reference power corresponding to the current wind speed gear; determining that the filter enters a replacement preparation period at least satisfies the following conditions: the real-time fan power measured by the intelligent fresh air system at a fourth moment is less than the labeled power corresponding to the current wind speed gear, the absolute value of the difference between the real-time fan power and the labeled power is greater than or equal to a second value set manually, and the second value is less than the absolute value of the difference between the reference power corresponding to the current wind speed gear and the standard power corresponding to the current wind speed gear; and the real-time fan power measured at any moment in a fourth period set manually from the fourth moment is smaller than the standard power corresponding to the current wind speed gear and larger than the reference power corresponding to the current wind speed gear.
Further, when a fourth period set manually from the fourth time arrives, a filter maintenance reminder is sent out and the replacement preparation period is started.
Furthermore, the power of the fan in the intelligent fresh air system is calculated by collecting the current and the voltage of the fan.
A method for judging replacement of an intelligent fresh air system filter comprises the following steps: a new filter is arranged in an intelligent fresh air system in an experimental environment, and fan parameters corresponding to different wind speed gears are obtained and serve as first reference parameters; a simulated dust deposition filter with the end of life is installed in an intelligent fresh air system in an experimental environment, and fan parameters corresponding to different wind speed gears are obtained and serve as second reference parameters; in an actual use place, installing an intelligent fresh air system filled with a new filter in place; adjusting the wind speed gears of an intelligent fresh air system in an actual use place, and collecting corresponding fan parameters under different wind speed gears as use parameters; calculating and acquiring service life end parameters corresponding to the intelligent fan system in different wind speed gears in an actual use place according to the use parameters; monitoring fan parameters of an intelligent fresh air system in an actual use place in real time, comparing the fan parameters with the service life end parameters of the current wind speed gear, and judging whether a filter needs to be replaced or not according to whether the real-time fan parameters reach the service life end parameters or not; the fan parameter is the fan power of the intelligent fresh air system working at a constant rotating speed or the fan rotating speed of the intelligent fresh air system working at a constant output power; the first reference parameter, the second reference parameter, the use parameter and the end-of-life parameter are corresponding fan rotating speed or fan power parameters; the end-of-life parameter is calculated by the first reference parameter/the second reference parameter being the usage parameter/the end-of-life parameter.
Further, determining that the filter needs to be replaced satisfies the following condition: and when the real-time fan parameters measured by the intelligent fresh air system at a certain fifth moment reach the end-of-life parameters corresponding to the current wind speed gear, and the real-time fan parameters measured at any moment in a manually set fifth period from the fifth moment reach or exceed the end-of-life parameters corresponding to the current wind speed gear, a filter replacement prompt is sent when the manually set fifth period from the fifth moment reaches.
As can be seen from the above description of the present invention, the present invention has the following advantages over the prior art:
1. according to the method for judging the replacement of the intelligent fresh air system filter, the comparison threshold data under different wind speed gears are acquired by adopting the simulated dust deposition filter with the end of service life, so that the data acquisition time is effectively saved, the comparison result is reliable, the time consumption of the product in the experimental period before delivery is reduced, and the enterprise benefit can be effectively improved; in order to reduce the influence of factors such as the length, the diameter change, the sewing and the bend of the installed fresh air pipeline stored in the installation of the intelligent fresh air system, the influence of external dynamic factors on the resistance of the fresh air system in the installation process is effectively eliminated by loading a new filter and an old filter in the fresh air system in the actual use place for data acquisition or loading the new filter and the old filter in the fresh air system in the experimental environment for data acquisition and proportionally referencing and using the new filter and the actual use data in the fresh air system in the actual use place, and the data of the rotating speed of the fan under the premise of constant power can be a fixed value or the data of the power of the fan under the premise of constant rotating speed can be a fixed value under the same wind speed gear position, so that the validity and the accuracy of a judgment result are ensured.
2. According to the first method for judging the replacement of the filter of the intelligent fresh air system, the output power of the fan in the intelligent fresh air system is constant; installing an intelligent fresh air system in place in an actual use place, and then installing a simulated dust deposition filter with a service life ending so as to obtain the rotating speed of the fan under different wind speed gears as a reference rotating speed; when the intelligent fresh air system is normally used, the real-time fan rotating speed under the current wind speed gear of the intelligent fresh air system is monitored in real time and is compared with the reference rotating speed, so that the state of dust accumulation resistance of the fresh air system can be obtained, namely if the real-time fan rotating speed under the current wind speed gear exceeds a normal value and exceeds the reference rotating speed under the current wind speed gear corresponding to the simulated dust accumulation filter in the normal operation process, the filter can be judged to be required to be replaced; by adopting the judging method, the influence on the resistance, which is possibly caused by the installation dynamic factors of the intelligent fresh air system, is eliminated, the data acquisition mode with reference to the rotating speed is simple and convenient, and the acquisition speed is higher; meanwhile, the use of a current and voltage acquisition circuit is avoided, and the overall cost is low; guarantee that the user can effectively judge the life of filter and change.
3. In the first method for judging the replacement of the filter of the intelligent fresh air system, if the real-time fan rotating speed is greater than the reference rotating speed corresponding to the current wind speed gear when the intelligent fresh air system is measured at the first moment, and the real-time fan rotating speed measured at any moment in the first continuous period is greater than the reference rotating speed corresponding to the current wind speed gear, the dust deposition amount of the filter in the currently used intelligent fresh air system can be judged to reach the dust deposition degree relative to the filter with the end of service life, so that a user can be reminded to replace the filter according to the judgment result, and secondary pollution and energy consumption of air are avoided.
4. In the first method for judging the replacement of the filter of the intelligent fresh air system, the rotating speeds of corresponding fans at different wind speed gears can be acquired as standard rotating speeds by adjusting the wind speed gears before the intelligent fresh air system is used; therefore, a normal rotating speed value which is required to be reached in the normal use state of the intelligent fresh air system can be compared, whether the parameters of the intelligent fresh air system are normal under the condition that the new filter is normally used is determined, and the condition that the new filter is in an abnormal state when the new filter is used at first is eliminated.
5. In a first method for judging replacement of a filter of an intelligent fresh air system, the method further comprises judging whether the filter enters a replacement preparation period or not so as to remind a user to prepare for replacing the filter in advance, and the specific judgment method comprises the following steps: when the intelligent fresh air system detects that the real-time fan rotating speed is greater than the standard rotating speed corresponding to the current wind speed gear at a certain second moment, the absolute value of the difference between the real-time fan rotating speed and the standard rotating speed corresponding to the current wind speed gear is greater than or equal to the first value set manually, the first absolute value of the difference between the reference rotating speed corresponding to the current wind speed gear and the standard rotating speed corresponding to the current wind speed gear is greater than the absolute value of the difference between the reference rotating speed corresponding to the current wind speed gear and the absolute value of the difference between the reference rotating speed and the standard rotating speed, and meanwhile, the real-time fan rotating speed detected by the intelligent fresh air system at the certain second moment is 3300 revolutions and 3000 revolutions, the real-time fan rotating speed is less than the standard rotating speed, the difference between the standard rotating speed and the standard rotating speed exceeds the first value set 250 revolutions, and the real-time fan rotating speed is less than the reference rotating speed, if the real-time fan rotating speed is still kept at a higher level in the second period, the filter can be judged to enter the replacement preparation period at the moment, and a pre-judgment result is made for a user in advance.
6. In the intelligent new trend system, when the laying dust on the filter increases, the whole resistance of intelligent new trend system increases, and the resistance increases can lead to the torque of fan to diminish, can know by the invariable characteristic of output of fan, and the torque of fan diminishes will bring the rotational speed and uprise, from this, can judge the laying dust condition of filter according to the judgement to the fan rotational speed.
7. The method for judging the replacement of the second intelligent fresh air system filter is consistent with the method for judging the replacement of the first intelligent performance system filter in the thinking, the influence on the resistance, which is possibly caused by the installation dynamic factors of the intelligent fresh air system, can be eliminated, the data acquisition mode of the reference power is simple and convenient, and the acquisition speed is high; guarantee that the user can effectively judge the life of filter and change.
8. In the second method for judging the replacement of the filter of the intelligent fresh air system, when the dust deposition on the filter increases, the integral resistance of the intelligent fresh air system increases, the output air volume decreases, and the output power of the fan decreases, so that the dust deposition condition of the filter can be judged according to the judgment on the output power of the fan.
9. According to the third method for judging the replacement of the intelligent fresh air system filter, fan parameters corresponding to different wind speed gears corresponding to a new filter and an old filter in an experimental environment are used, then in an actual use place, a life end parameter corresponding to a current wind speed gear in actual use is deduced through a relationship that a first reference parameter/a second reference parameter is a use parameter/a life end parameter, and then the parameter of the running fan is compared with the life end parameter in real time to judge the dust accumulation condition of the filter; when the service parameters monitored in real time reach the end-of-life parameters, the filter can be determined to be required to be replaced; the mode not only eliminates the influence on the resistance possibly brought by the installation dynamic factors of the intelligent fresh air system, but also obtains the second reference parameter acquired in the state of adopting the service life ending filter in the experimental stage, thereby avoiding the condition that an old filter is required to be carried on simulation in the installation field, reducing the installation complexity and being beneficial to improving the installation efficiency.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, 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 some embodiments of the present invention, 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 diagram illustrating a relationship between a fan and a motor driving board according to a first embodiment of the present invention.
Detailed Description
The technical solution in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. It is to be understood that the described embodiments are presently preferred embodiments of the invention and are not to be taken as an exclusion of other embodiments. All other embodiments, which can be obtained by a person skilled in the art without any inventive step based on the embodiments of the present invention, are within the scope of the present invention.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, the terms "first", "second" or "third", etc. are used for distinguishing between different items and not for describing a particular sequence.
In the claims, the specification and the drawings of the present invention, unless otherwise expressly limited, all directional or positional relationships indicated by the terms "center," "lateral," "longitudinal," "horizontal," "vertical," "top," "bottom," "inner," "outer," "upper," "lower," "front," "rear," "left," "right," "clockwise," "counterclockwise," and the like are based on the directional or positional relationships indicated in the drawings and are used for convenience in describing the present invention and for simplicity in description, but do not indicate or imply that the device or element so indicated must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the scope of the present invention.
In the claims, the description and the drawings of the present application, unless otherwise expressly limited, the terms "fixedly connected" or "fixedly connected" should be interpreted broadly, that is, any connection between the two that does not have a relative rotational or translational relationship, that is, non-detachably fixed, integrally connected, and fixedly connected by other devices or elements.
In the claims, the specification and the drawings of the present invention, the terms "including", "having" and their variants, if used, are intended to be inclusive and not limiting.
The method for judging the replacement of the intelligent fresh air system filter provided by the embodiment of the invention comprises the following three implementation modes:
the method for judging the replacement of the intelligent fresh air system filter comprises the following steps: the output power of a fan in the intelligent fresh air system is constant; the method comprises the steps of loading a simulated dust deposition filter with the service life ending in an intelligent fresh air system installed in place in an actual use place, and acquiring the rotating speed of a fan at different wind speed gears as a reference rotating speed r1(ii) a Real-time fan rotating speed r of intelligent fresh air system for detecting new filter in actual use state0(ii) a According to the change of the real-time fan rotating speed and the current wind speed gearReference rotational speed r corresponding to position1And (4) comparing to judge whether the filter needs to be replaced.
Wherein, the following conditions are satisfied when the filter is judged to need to be replaced: intelligent fresh air system at a certain first moment t1Measured real-time fan rotating speed r0Is greater than the reference rotating speed r corresponding to the current wind speed gear1And from a first time t1First period T set by person1Real-time fan rotating speed r measured at any time in room0Are all larger than the reference rotating speed r corresponding to the current wind speed gear1. When the first time t1First period T set by person1When the filter arrives, a filter replacement prompt is sent.
The method further comprises the following steps: the corresponding fan rotating speeds under different wind speed gears are collected by adjusting the wind speed gears of the intelligent fresh air system which is installed in place in the actual use place and is provided with the new filter, and the obtained corresponding fan rotating speeds under different wind speed gears are used as the standard rotating speed r2。
Preferably, the method further includes determining a replacement preparation period before replacing the filter, and specifically includes: according to the real-time fan rotating speed r0And its reference rotation speed r corresponding to the current wind speed gear1Comparing, and judging whether the filter enters a replacement preparation period; determining that the filter enters a replacement preparation period at least satisfies the following conditions:
the intelligent fresh air system is at a certain second moment t2Measured real-time fan rotating speed r0Is greater than the standard rotating speed r corresponding to the current wind speed gear1The absolute value of the difference between the two is more than or equal to a first value delta r set artificially, and the first value delta r is less than the reference rotating speed r corresponding to the current wind speed gear1The standard rotating speed r corresponding to the current wind speed gear2The absolute value of the difference of (a); from a second instant t2Second period T set by person2Real-time fan rotating speed r measured at any time0Are all larger than the standard rotating speed r corresponding to the current wind speed gear2And is less than the reference rotating speed r corresponding to the current wind speed gear1(ii) a When in useSecond time t2Second period T set by person2When the filter arrives, a filter maintenance prompt is sent out and the replacement preparation period is started.
The output power of the fan in the intelligent fresh air system is adjusted through the motor drive board, wherein the rotating speed of the fan is calculated through P pi/30T n, P is the output power of the fan, T is the torque of the fan, and n is the rotating speed of the fan.
The method for judging the replacement of the intelligent fresh air system filter is simply summarized as follows:
step 1: an intelligent fresh air system is installed in an actual use place;
step 2: the intelligent fresh air system is filled with a completely new filter, the engineering mode of the intelligent system is adjusted to enable the intelligent fresh air system to normally operate, and then the standard rotating speed r corresponding to different wind speed gears is detected by adjusting different wind speed gears2And generate table 1;
and step 3: a simulated dust deposition filter with the service life ending is arranged to collect corresponding reference rotating speeds r under different wind speed gears1And generate table 2;
and 4, step 4: the intelligent fresh air system enters a normal working mode and monitors the real-time fan rotating speed r of the fan in real time0；
And 5: according to the real-time rotating speed r of the fan0Comparing with table 1 and table 2;
step 6: when the real-time fan rotating speed r0Above the corresponding reference speed r for a period of time1And when the filter is replaced, reminding the client to replace the filter.
In the embodiment, the output power of a fan in the intelligent fresh air system is adjusted through a DC/EC motor drive board, and the fan adopts a centrifugal DC/EC motor fan; as shown in fig. 1, a rotational speed output terminal FG of the centrifugal DC/EC motor fan feeds back rotational speed information to the DC/EC motor drive board, and the DC/EC motor drive board is connected to the centrifugal DC/EC motor fan through a VSP terminal thereof, and controls an output power of the centrifugal DC/EC motor fan.
The second method for judging the replacement of the intelligent fresh air system filter comprises the following steps: fan rotation in intelligent fresh air systemThe speed is constant; the power under different wind speed gears is obtained as the reference power P by installing a simulated dust deposition filter with the end of life in an intelligent fresh air system installed in place in an actual use place1(ii) a Real-time fan power P of intelligent fresh air system for detecting new filter in actual use state0(ii) a According to real-time fan power P0And its reference power P corresponding to the current wind speed gear1And (4) comparing to judge whether the filter needs to be replaced.
Wherein, the following conditions are satisfied when the filter is judged to need to be replaced: the intelligent fresh air system is at a certain third moment t3Measured real-time fan power P0Is less than the reference power P corresponding to the current wind speed gear1And from a third time t3Third period T set by person3Real-time fan power P measured at any time0Are all less than the reference rotating speed P corresponding to the current wind speed gear1(ii) a When the third time t3Third period T set by person3When the filter arrives, a filter replacement prompt is sent.
The method further comprises the following steps: the corresponding fan power under different wind speed gears is collected by adjusting the wind speed gears of the intelligent fresh air system which is installed in place in the actual use place and is provided with the new filter, and the obtained corresponding fan power under different wind speed gears is used as the standard power P2。
Preferably, the method further includes determining a replacement preparation period before replacing the filter, and specifically includes: according to the change of the real-time fan rotating speed and the reference power P corresponding to the current wind speed gear1Comparing, and judging whether the filter enters a replacement preparation period; determining that the filter enters a replacement preparation period at least satisfies the following conditions: the intelligent fresh air system is at a certain fourth time t4Measured real-time fan power P0Is less than the standard power P corresponding to the current wind speed gear2The absolute value of the difference between the two is more than or equal to a second value delta P set artificially, and the second value delta P is less than the reference power P corresponding to the current wind speed gear1Gear position corresponding to current wind speedCorresponding standard power P2The absolute value of the difference of (a); from a fourth moment t4Fourth period T set by person4Real-time fan power P measured at any time0Are all less than the standard power P corresponding to the current wind speed gear2And is greater than the reference power P corresponding to the current wind speed gear1(ii) a When the fourth time t4Fourth period T set by person4When the filter arrives, a filter maintenance prompt is sent out and the replacement preparation period is started.
In the method, the intelligent fresh air system is provided with a current acquisition circuit to acquire current, and the power of the fan in the intelligent fresh air system is calculated through the product of the current and the voltage.
The method for judging the replacement of the intelligent fresh air system filter is simply summarized as follows:
step 1: an intelligent fresh air system is installed in an actual use place;
step 2: the intelligent fresh air system is filled with a completely new filter, the engineering mode of the intelligent system is adjusted to enable the intelligent fresh air system to normally operate, and then the standard power P corresponding to different wind speed gears is detected by adjusting different wind speed gears2And generate table 1;
and step 3: a simulated dust deposition filter with the service life ending is arranged to collect each corresponding reference power P under different wind speed gears1And generate table 2;
and 4, step 4: the intelligent fresh air system enters a normal working mode and monitors the real-time fan power P of the fan in real time0；
And 5: according to real-time fan power P0Comparing with table 1 and table 2;
step 6: when real-time fan power P0Above the corresponding reference power P for a period of time1And when the filter is replaced, reminding the client to replace the filter.
The third embodiment of the method for judging the replacement of the intelligent fresh air system filter comprises the following steps:
step 1: a new filter is arranged in an intelligent fresh air system in an experimental environment, and fan parameters corresponding to different wind speed gears are obtained and serve as first reference parameters;
step 2: a simulated dust deposition filter with the end of life is installed in an intelligent fresh air system in an experimental environment, and fan parameters corresponding to different wind speed gears are obtained and serve as second reference parameters;
and step 3: in an actual use place, installing an intelligent fresh air system filled with a new filter in place;
and 4, step 4: adjusting the wind speed gears of an intelligent fresh air system in an actual use place, and collecting corresponding fan parameters under different wind speed gears as use parameters;
and 5: calculating and acquiring service life end parameters corresponding to the intelligent fan system in different wind speed gears in an actual use place according to the use parameters;
step 6: the method comprises the steps of monitoring fan parameters of an intelligent fresh air system in an actual use place in real time, comparing the fan parameters with life-ending parameters of a current wind speed gear, and judging whether a filter needs to be replaced or not according to the fact whether the real-time fan parameters reach the life-ending parameters or not.
The fan parameter is the fan power of the intelligent fresh air system working at a constant rotating speed or the fan rotating speed of the intelligent fresh air system working at a constant output power; the first reference parameter, the second reference parameter, the use parameter and the end-of-life parameter are corresponding fan rotating speed or fan power parameters; the end-of-life parameter is calculated by the first reference parameter/the second reference parameter being the usage parameter/the end-of-life parameter.
Specifically, determining that the filter needs to be replaced satisfies the following condition: the intelligent fresh air system is at a certain fifth moment t5The measured real-time fan parameter reaches the end-of-life parameter corresponding to the current wind speed gear, and the fifth moment t is5A fifth period T set by man5If the real-time fan parameters measured at any time in the wind power generation system all reach or exceed the service life ending parameters corresponding to the current wind speed gears, the fifth time t is5Fifth period to T set manually5And when the time is up, sending out a filter replacement prompt.
In the embodiments, the comparison threshold data under different wind speed gears are acquired by adopting the simulated dust deposition filter with the end of life, so that the acquisition time of the data is effectively saved, the comparison result is reliable, the time consumption of the product in the experimental period before delivery is reduced, and the enterprise benefit can be effectively improved; in order to reduce the influence of factors such as the length, the diameter change, the sewing and the bend of the installed fresh air pipeline stored in the installation of the intelligent fresh air system, the influence of external dynamic factors on the resistance of the fresh air system in the installation process is effectively eliminated by loading a new filter and an old filter in the fresh air system in the actual use place for data acquisition or loading the new filter and the old filter in the fresh air system in the experimental environment for data acquisition and proportionally referencing and using the new filter and the actual use data in the fresh air system in the actual use place, and the data of the rotating speed of the fan under the premise of constant power can be a fixed value or the data of the power of the fan under the premise of constant rotating speed can be a fixed value under the same wind speed gear position, so that the validity and the accuracy of a judgment result are ensured.
The description of the above specification and examples is intended to be illustrative of the scope of the present invention and is not intended to be limiting. Modifications, equivalents and other improvements which may occur to those skilled in the art and which may be made to the embodiments of the invention or portions thereof through a reasonable analysis, inference or experiment may be included within the scope of the invention through a general knowledge of the art, a general knowledge of the art and/or a limited number of experiments in light of the above teachings of the invention or the above embodiments.
Claims (16)
1. A method for judging replacement of an intelligent fresh air system filter is characterized by comprising the following steps:
the output power of a fan in the intelligent fresh air system is constant; the method comprises the steps that a simulated dust deposition filter with the end of life is arranged in an intelligent fresh air system which is installed in place in an actual use place, and the rotating speeds of fans under different wind speed gears are obtained to serve as reference rotating speeds; detecting the real-time fan rotating speed of an intelligent fresh air system filled with a new filter in an actual use state; and judging whether the filter needs to be replaced or not according to the change of the rotating speed of the real-time fan and the comparison of the rotating speed with the reference rotating speed corresponding to the current wind speed gear.
2. The method as claimed in claim 1, wherein the filter replacement requirement is determined to satisfy the following condition: the real-time fan rotating speed measured by the intelligent fresh air system at a certain first moment is greater than the reference rotating speed corresponding to the current wind speed gear, and the real-time fan rotating speed measured at any moment in a first period set manually from the first moment is greater than the reference rotating speed corresponding to the current wind speed gear.
3. The method as claimed in claim 2, wherein a filter replacement reminder is issued when a first period of time is reached, said first period of time being set manually, starting from the first time.
4. The method as claimed in claim 1, further comprising: the corresponding fan rotating speeds under different wind speed gears are collected by adjusting the wind speed gears of the intelligent fresh air system which is installed in place in an actual use place and is provided with the new filter, and the obtained corresponding fan rotating speeds under different wind speed gears are used as standard rotating speeds.
5. The method as claimed in claim 4, further comprising: judging whether the filter enters a replacement preparation period or not according to the change of the rotating speed of the real-time fan and the comparison of the rotating speed with a reference rotating speed corresponding to the current wind speed gear; determining that the filter enters a replacement preparation period at least satisfies the following conditions:
the real-time fan rotating speed measured by the intelligent fresh air system at a certain second moment is greater than the standard rotating speed corresponding to the current wind speed gear, the absolute value of the difference between the real-time fan rotating speed and the standard rotating speed is greater than or equal to a first value set manually, and the first value is smaller than the absolute value of the difference between the reference rotating speed corresponding to the current wind speed gear and the standard rotating speed corresponding to the current wind speed gear;
and the real-time rotating speed of the fan measured at any moment in a second period set manually from the second moment is greater than the standard rotating speed corresponding to the current wind speed gear and less than the reference rotating speed corresponding to the current wind speed gear.
6. The method as claimed in claim 5, wherein a filter maintenance reminder is issued and a replacement preparation period is entered when a second period of time set by a person is reached from the second time.
7. The method according to claim 1, wherein the output power of the fan in the intelligent fresh air system is adjusted by a motor driving board, wherein the rotation speed of the fan is calculated by P pi/30T n, P is the output power of the fan, T is the torque of the fan, and n is the rotation speed of the fan.
8. A method for judging replacement of an intelligent fresh air system filter is characterized by comprising the following steps:
the rotating speed of a fan in the intelligent fresh air system is constant; the method comprises the steps that a simulated dust deposition filter with the end of life is arranged in an intelligent fresh air system which is installed in place in an actual use place, and the power under different wind speed gears is obtained to be used as reference power; detecting the real-time fan power of an intelligent fresh air system loaded with a new filter in an actual use state; and judging whether the filter needs to be replaced or not according to the change of the real-time fan power and the comparison of the change of the real-time fan power and the reference power corresponding to the current wind speed gear.
9. The method as claimed in claim 8, wherein the filter replacement requirement is determined to satisfy the following condition: the real-time fan power measured by the intelligent fresh air system at a certain third moment is smaller than the reference power corresponding to the current wind speed gear, and the real-time fan power measured at any moment in a third period set manually from the third moment is smaller than the reference rotating speed corresponding to the current wind speed gear.
10. The method as claimed in claim 9, wherein a filter replacement reminder is issued when a third period set by a person is reached from the third time.
11. The method as claimed in claim 8, further comprising: the wind speed gears of the intelligent fresh air system which is installed in place in an actual use place and is provided with the new filter are adjusted, the corresponding fan power under different wind speed gears is collected, and the obtained corresponding fan power under different wind speed gears is used as standard power.
12. The method as claimed in claim 11, further comprising: judging whether the filter enters a replacement preparation period or not according to the change of the rotating speed of the real-time fan and the comparison of the change of the rotating speed of the real-time fan and the reference power corresponding to the current wind speed gear; determining that the filter enters a replacement preparation period at least satisfies the following conditions:
the real-time fan power measured by the intelligent fresh air system at a fourth moment is less than the standard power corresponding to the current wind speed gear, the absolute value of the difference between the real-time fan power and the standard power is more than or equal to a second value set manually, and the second value is less than the absolute value of the difference between the reference power corresponding to the current wind speed gear and the standard power corresponding to the current wind speed gear;
and the real-time fan power measured at any moment in a fourth period set manually from the fourth moment is smaller than the standard power corresponding to the current wind speed gear and larger than the reference power corresponding to the current wind speed gear.
13. The method as claimed in claim 12, wherein a filter maintenance reminder is issued and a replacement preparation period is entered when a fourth period set by a human is reached at the fourth time.
14. The method as claimed in claim 8, wherein the power of the fan in the intelligent fresh air system is calculated by collecting the current and voltage of the fan.
15. A method for judging replacement of an intelligent fresh air system filter is characterized by comprising the following steps:
a new filter is arranged in an intelligent fresh air system in an experimental environment, and fan parameters corresponding to different wind speed gears are obtained and serve as first reference parameters;
a simulated dust deposition filter with the end of life is installed in an intelligent fresh air system in an experimental environment, and fan parameters corresponding to different wind speed gears are obtained and serve as second reference parameters;
in an actual use place, installing an intelligent fresh air system filled with a new filter in place;
adjusting the wind speed gears of an intelligent fresh air system in an actual use place, and collecting corresponding fan parameters under different wind speed gears as use parameters;
calculating and acquiring service life end parameters corresponding to the intelligent fan system in different wind speed gears in an actual use place according to the use parameters;
monitoring fan parameters of an intelligent fresh air system in an actual use place in real time, comparing the fan parameters with the service life end parameters of the current wind speed gear, and judging whether a filter needs to be replaced or not according to whether the real-time fan parameters reach the service life end parameters or not;
the fan parameter is the fan power of the intelligent fresh air system working at a constant rotating speed or the fan rotating speed of the intelligent fresh air system working at a constant output power;
the first reference parameter, the second reference parameter, the use parameter and the end-of-life parameter are corresponding fan rotating speed or fan power parameters;
the end-of-life parameter is calculated by the first reference parameter/the second reference parameter being the usage parameter/the end-of-life parameter.
16. The method as claimed in claim 15, wherein the filter replacement requirement is determined to satisfy the following condition: and when the real-time fan parameters measured by the intelligent fresh air system at a certain fifth moment reach the end-of-life parameters corresponding to the current wind speed gear, and the real-time fan parameters measured at any moment in a manually set fifth period from the fifth moment reach or exceed the end-of-life parameters corresponding to the current wind speed gear, a filter replacement prompt is sent when the manually set fifth period from the fifth moment reaches.
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| CN110925952A (en) * | 2019-12-13 | 2020-03-27 | 雷勃电气(常州)有限公司 | Method for realizing filter screen blockage detection function through motor |
| CN111256289B (en) * | 2020-02-17 | 2021-08-10 | 海信（山东）空调有限公司 | Filter screen filth blockage detection method |
| CN113446247B (en) * | 2021-06-22 | 2022-06-17 | 杭州和而泰智能控制技术有限公司 | Method for detecting filter screen pollution turbidity by direct-current variable-frequency fan and fresh air filtering device |
| CN113513805B (en) * | 2021-07-22 | 2023-01-03 | 中山市万得福电子热控科技有限公司 | Air treatment apparatus, control method thereof, and computer-readable storage medium |
| CN113639405B (en) * | 2021-07-23 | 2023-05-26 | 青岛海尔空调电子有限公司 | Method and device for controlling air conditioner and intelligent air conditioner |
| CN115247861B (en) * | 2022-06-28 | 2023-09-08 | 浙江中广电器集团股份有限公司 | Air conditioner and dust removal control method thereof |
| CN115370599B (en) * | 2022-07-11 | 2024-07-09 | 江苏科技大学 | Fan control method based on permanent magnet synchronous motor |
| CN115121072B (en) * | 2022-08-31 | 2023-09-29 | 安徽省青阳县五溪矿业有限责任公司 | Method and system for determining replacement of filter grids of mining dust remover |
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