CN111637591B - Filter screen dust removal reminding control method and dust removal reminding device - Google Patents
Filter screen dust removal reminding control method and dust removal reminding device Download PDFInfo
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- CN111637591B CN111637591B CN202010414104.2A CN202010414104A CN111637591B CN 111637591 B CN111637591 B CN 111637591B CN 202010414104 A CN202010414104 A CN 202010414104A CN 111637591 B CN111637591 B CN 111637591B
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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
- F24F11/52—Indication arrangements, e.g. displays
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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
- F24F11/62—Control or safety arrangements characterised by the type of control or by internal processing, e.g. using fuzzy logic, adaptive control or estimation of values
- F24F11/63—Electronic processing
- F24F11/64—Electronic processing using pre-stored data
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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
- F24F11/70—Control systems characterised by their outputs; Constructional details thereof
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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
- F24F11/88—Electrical aspects, e.g. circuits
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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
- F24F2110/00—Control inputs relating to air properties
- F24F2110/40—Pressure, e.g. wind pressure
Abstract
The invention provides a dust removal reminding control method and a dust removal reminding device for a filter screen, which are used for monitoring the filthy blockage state of the filter screen in the operation process of an air conditioner by utilizing a Pressure Sensitive Paint (PSP) measurement technology, wherein the different filthy blockage states of the filter screen can be reflected according to different pressures under different filthy blockage states, so that dust removal reminding with different degrees can be carried out, the effective monitoring of the state of the filter screen is realized, the pressure sensitive paint measurement technology is applied, the detection cost is lower, the preparation time is short, the detection result is high in accuracy, meanwhile, the technology is good in stability, the problem of flow field interference caused by the traditional detection technology can be well solved, the device is simple in structure, and an additional sensor is not needed for parameter detection.
Description
Technical Field
The invention relates to the technical field of air conditioners, in particular to a filter screen dust removal reminding control method and a dust removal reminding device.
Background
With the development of modern society, the living standard of residents is higher and higher, and people pay more and more attention to the home environment and self health. When the air conditioner is started, the air passes through the filter screen and is enriched on the surface of the filter screen under the drive of airflow, and when the amount of the enriched micro-powder dust is large, an airflow channel of the filter screen is blocked, so that the actual performance of the air conditioner is influenced; meanwhile, the dust enrichment easily causes the growth of bacteria, and the bacteria float in the indoor space along with the airflow, so that the health of a human body is seriously affected. Therefore, the dust removal reminding function with high reliability of the air conditioner product is developed, and a user is reminded to carry out dust removal operation on the filter screen.
Among the products in the current air conditioner market, the function is reminded in the dust removal has actually been applied to some products, and its main technology includes: the infrared sensor technology, the photoresistor monitoring technology, the inner fan current monitoring technology, the surface imaging technology and the like are adopted, and extra sensor detection signals are required to be arranged in the modes. The invention develops an air conditioner dust removal reminding function different from the technology.
Disclosure of Invention
In order to solve the problems, the invention provides a filter screen dust removal reminding control method and a dust removal reminding device, which detect the filth blockage state of a filter screen by a pressure sensitive paint measurement technology.
A dust removal reminding control method for a filter screen comprises the following steps:
the method for detecting the filth blockage state of the filter screen by adopting the pressure sensitive paint measuring technology specifically comprises the following steps: spraying a pressure sensitive coating (4) on the air-conditioning filter screen, acquiring an output pressure value F of the pressure sensitive coating (4) area, and acquiring a reference pressure value F under the condition that the filter screen is completely clean according to the output pressure value F0And judging the filth blockage state of the air conditioner filter screen.
The invention originally adopts a Pressure Sensitive Paint (PSP) measuring technology to monitor the filthy blockage state of the filter screen in the operation process of the air conditioner, measures the pressure distribution of the surface of an object through the optical characteristics measured by the pressure sensitive paint, the pressure of the filter screen under different filthy blockage states is different, the detected pressure value under the working state is compared with the reference pressure value under the completely clean state of the filter screen, and different filthy blockage states of the filter screen are reflected according to different pressures, so that the dust removal reminding of different degrees is carried out.
Further, the method also comprises the following steps:
after receiving a starting instruction, the air conditioner acquires the pressure value of the pressure sensitive coating (4) on the air conditioner filter screen; judging whether the pressure value meets the preset condition of a completely clean state or not;
if the pressure value meets the preset condition of a completely clean state, the air conditioner does not enter a filter screen filth blockage detection process when receiving a shutdown signal; if the pressure value does not meet the preset condition of a completely clean state, the air conditioner enters a filter screen filth blockage detection process when receiving a shutdown signal;
after the air conditioner enters a filter screen filth blockage detection flow, the outer unit of the air conditioner is normally shut down, and the inner fan rotates at the rotating speed r0Operating, ventilating, stabilizing the working condition of the internal machine, acquiring an output pressure value F at regular intervals, averaging the output pressure values F detected for multiple times, and averaging the average pressure value FaveSending the data to an internal machine controller;
calculating the average pressure value FaveExceeding the reference pressure value F0Ratio ψ of: psi ═ Fave-F0)/F0；
Determining different filth blockage states of the filter screen according to the proportion psi;
and after the steps are executed, the air conditioner indoor unit is turned off.
Further, the preset condition of the completely clean state is that the output pressure values of all the regions are less than or equal to the reference pressure value: f is less than or equal to F0。
Furthermore, i areas coated with pressure sensitive coatings (4) are distributed on the surface of the filter screen, and the number of the areas is NiReference pressure value of each region is Fi0Separately obtaining the output pressure value F of each regioni。
The area that scribbles pressure sensitive coating sets up a plurality ofly, has better sample collection effect to the whole dirty stifled state of reaction filter screen that can be accurate.
Further, dividing the pressure proportion value into k different ranges to respectively accumulate the number n of the regions falling into the corresponding ranges according to different filth blockage states of the filter screenk-1。
Further, k is 5, i.e. the pressure ratio is divided into 5 ranges:
if tiIf the number of the data detection areas is less than 0, judging that the data detection in the area has errors, rejecting the data, and accumulating the number of the data detection areas with errors to be n0；
If 0 is less than or equal to psiiIf a is less than or equal to a, the area is judged to be in a clean state, and the number of the areas with the clean state of the filter screen is accumulated to be n1；
③ if a<ΨiB is less than or equal to b, the area is judged to be in a slight filth blockage state, and the number of the areas with the slight filth blockage state of the filter screen is accumulated to be n2；
Fourthly if b<ΨiC is less than or equal to c, the area is judged to be in a general filth blockage state, and the number of the areas with the general filth blockage state of the filter screen is accumulated to be n3；
P if tiIf the number of the areas is more than c, the area is judged to be in a serious filthy blockage state, and the number of the areas in the serious filthy blockage state of the filter screen is accumulated to be n4；
There exists a corresponding relationship n1+n2+n3+n4＝i-n0(ii) a a, b and c are proportional range values.
The data are divided into error, clean, slight filth blockage, general filth blockage and serious filth blockage according to the pressure proportion value, the effectiveness of the data can be reasonably identified, different filth blockage states of the filter screen are divided, and the method has good filth blockage state distinguishing and identifying effects.
Further, if nk-1And displaying the filter screen state corresponding to the range on the internal machine display panel if the value is more than or equal to h.i, otherwise, not executing any dirty blockage prompting operation by the display panel, wherein h is a proportionality coefficient, and i is the total number of the regions.
Further, the proportional parameter h takes a value of 0.5, namely:
if n0When the filter screen filth blockage detection system fault is more than or equal to 0.5i, the system prompts a user to report repair; if n is0When the frequency is less than 0.5i, the system normally carries out the next judgment operation;
if n1≥0.5(i-n0) When the current filter screen is in a clean state, the system prompts the clean state of the filter screen;
(r if n)2≥0.5(i-n0) When the current filter screen is in a slight filth blockage state, the system prompts that the filter screen is slightly filth blockage;
if n3≥0.5(i-n0) When the current filter screen is in a general filth blockage state, the system prompts that the filter screen is generally filth blockage;
if n4≥0.5(i-n0) When the current filter screen is in a serious filth blockage state, the system prompts that the filter screen is seriously filth-blocked;
if the system does not belong to any range of the first to the fifth, the system does not execute any filth prompt operation.
The overall filth blockage state of the filter screen is specifically evaluated according to the number of areas in different filth blockage states, wherein the proportional coefficient value of 0.5 is a conventional and reasonable parameter setting, namely when the number of the areas in the filth blockage state is more than or equal to half of the total number of the areas, the filth blockage state can represent the current state of the filter screen, and meanwhile, the proportional coefficient can be set to other values (0< h <1) according to specific conditions and requirements.
The invention also provides an air conditioner filter screen dust removal reminding device, which is used for executing the air conditioner filter screen dust removal reminding control method and comprises the following steps: the device comprises an excitation light source module, a filter screen containing a pressure sensitive coating, an image information acquisition module and an image processing module.
The filter screen containing the pressure sensitive layer is irradiated by the excitation light source module, the pressure distribution condition on the filter screen is obtained by carrying out information acquisition on the pressure sensitive coating by the image information acquisition module and processing by the image processing module, and thus the filth blockage state is analyzed.
Furthermore, the excitation light source module comprises light source equipment and a filtering device, wherein the light source equipment emits incident light with the wavelength range matched with the optimal absorption wavelength of the selected coating, and the filtering device purifies the incident light.
The light energy with specific wavelength of the excitation light source induces the coating to emit fluorescence or phosphorescence, and oxygen molecules in the air medium are utilized to quench the photoluminescence oxygen of the pressure sensitive material.
Further, the image information acquisition module comprises a CCD camera and a filtering device, wherein the filtering device eliminates the influence of other light rays, and the CCD camera acquires the image of the area of the filter screen sprayed with the pressure sensitive coating and transmits the image to the image processing module for subsequent processing.
Further, the image processing module is connected with the controller and is mainly used for processing the acquired image to obtain an output pressure value of a region, coated with the pressure sensitive coating, of the filter screen, and calculating an average pressure value F from the output pressure value FaveAnd sends the data to the controller.
The technology has the advantages of wide detectable range, low cost and short preparation time, can better solve the problem of flow field interference caused by the traditional detection technology, and has the advantages of low detection cost, short preparation time, high accuracy of detection results, simple structure and no need of an additional sensor for parameter detection.
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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a flow chart of a filter screen dust removal reminding control method in embodiment 1;
fig. 2 is a flow chart of a filter screen dust removal reminding control method in embodiment 2;
FIG. 3 is a schematic diagram of a filth blockage detection of a filter screen;
description of reference numerals:
1-a light source device; 2-a light filtering device; 3, filtering the filter screen; 4-pressure sensitive coating; 5-a light filtering device; 6-CCD camera; 7-an image processing module; 8-a controller.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
Example 1
As shown in fig. 1, the control method of the filter screen dust removal reminding device of the invention comprises the following steps:
step 1, after receiving a starting instruction, the air conditioner acquires the pressure value of a pressure sensitive coating (4) on an air conditioner filter screen; judging whether the pressure value meets the preset condition of a completely clean state or not;
the preset condition of the complete clean state is that the output pressure values of all the areas are less than or equal to the reference pressure value: f is less than or equal to F0；F0The reference pressure value is the standard pressure value of the filter screen in the completely clean state.
step 4, calculating an average pressure value FaveExceeding the reference pressure value F0Ratio ψ of: psi ═ Fave-F0)/F0；
and 6, after the steps are executed, the air conditioner internal unit is turned off.
Example 2
In the embodiment, i areas coated with pressure sensitive coatings (4) are arranged on the surface of the filter screen, and the area number is NiReference pressure value of each region is Fi0Separately obtaining the output pressure value F of each regioniAnd a plurality of areas coated with pressure sensitive paint are arranged, so that a good sample collecting effect is achieved, the integral filth blocking state of the filter screen can be accurately reflected, and the detection precision is improved.
As shown in fig. 2, a control method of the filter screen dust removal reminding device is as follows:
step 1: after the air conditioner receives a starting instruction, judging whether all areas sprayed with the pressure sensitive coating 4 on the filter screen 3 have the output pressure value of Fi≤Fi0If so, the filter screen 3 just undergoes cleaning and dust removal operation and is in a completely clean state, and the filter screen filth blockage detection process is not started when a shutdown signal is subsequently received; otherwise, the filter screen 3 is not cleaned and dedusted, and then enters a filter screen filth blockage detection process when a shutdown signal is received, the filth blockage state when the filter screen 3 is finished running is judged, and the pressure threshold value F in a completely clean state is detected in the processi0As a reference pressure value;
step 2: after receiving a shutdown instruction, the air conditioner enters a filter screen filth blockage condition detection process, and the overall detection time is t0150 s: the outer machine of the air conditioner is normally shut down, and the inner fan rotates at a certain speed r0Operation, preferably inner fan speed r0T is carried out at first 900-1080 r/min1The ventilation operation is carried out for 60s, and the working condition of the internal machine is stabilized; then at the next t2Every t within 90s3Each region N was examined once for 10si(i is 1, 2 … … 20, namely 20 such areas distributed on the surface of the filter screen) pressure value Fij(j is 1, 2 … … 9), and the pressure value F corresponding to each region is setijAveraging to reduce fluctuation error to obtain each filter screenActual pressure value F of the areaiAnd transmitting the pressure data to the internal machine controller;
and step 3: f is to bei0、FiCalculated according to the following relationship, Ψ in the formulaiFor the actual pressure value F of each area of the filter screeniExceeding the reference pressure value Fi0The ratio of (a) to (b).
Ψi＝(Fi-Fi0)/Fi0
If tiIf the number of the data detection areas is less than 0, judging that the data detection in the area has errors, rejecting the data, and accumulating the number of the data detection areas with errors to be n0；
If 0 is less than or equal to psiiIf a is less than or equal to a, the area is judged to be in a clean state, and the number of the areas with the clean state of the filter screen is accumulated to be n1；
③ if a<ΨiB is less than or equal to b, the area is judged to be in a slight filth blockage state, and the number of the areas with the slight filth blockage state of the filter screen is accumulated to be n2；
Fourthly if b<ΨiC is less than or equal to c, the area is judged to be in a general filth blockage state, and the number of the areas with the general filth blockage state of the filter screen is accumulated to be n3；
P if tiIf the number of the areas is more than c, the area is judged to be in a serious filthy blockage state, and the number of the areas in the serious filthy blockage state of the filter screen is accumulated to be n4；
There exists a corresponding relationship n1+n2+n3+n4＝i-n0
And 4, step 4: based on the above results, further judgment is made if n isk-1And displaying the filter screen state corresponding to the range on the internal machine display panel if the value is more than or equal to h.i, otherwise, not executing any dirty blockage prompting operation by the display panel, wherein h is a proportionality coefficient, and i is the total number of the regions.
The proportional parameter h in the following control flow is 0.5 as a reference value, and can be adjusted according to the actual situation, namely, half or more than half of the area of the filter screen reaches the judgment standard:
if n0When the frequency is more than or equal to 0.5i, displaying the fault of the filter screen filth blockage detection system on a display panel of the internal machine, and reminding a user of repairing; if n is0< 0.5iThe system normally carries out the next judgment operation;
if n1≥0.5(i-n0) When the current filter screen is in a cleaning state, a display panel reports a cleaning state prompt;
(r if n)2≥0.5(i-n0) When the current filter screen is in a slight filth blockage state, reporting a filter screen slight filth blockage prompt on an internal machine display panel;
if n3≥0.5(i-n0) When the current filter screen is in a general filth blockage state, reporting a general filth blockage prompt of the filter screen on an internal display panel;
if n4≥0.5(i-n0) When the current filter screen is in a serious filth blockage state, reporting a prompt of serious filth blockage of the filter screen on an internal machine display panel;
if the display panel does not belong to any range of the first to the fifth, the display panel does not execute any filth prompting operation.
And 5: and after the steps are executed, the air conditioner indoor unit is turned off.
The prompt can be sent to the user in various modes such as a display panel, voice prompt, APP display, remote controller display and the like.
The control method measures the pressure distribution of the surface of an object through the optical characteristics measured by the pressure sensitive paint, the pressure on the filter screen is different under different filth blockage states, and the pressure value Fi under the detection working state and the reference pressure value F under the completely clean state of the filter screen are detectedi0The comparison is carried out, different filth blockage states of the filter screen are reflected according to different pressures, then dust removal reminding of different degrees is carried out, the data are divided into error, clean, slight filth blockage, general filth blockage and serious filth blockage according to the pressure proportion value, different filth blockage states of the filter screen are divided simultaneously according to the effectiveness of the data reasonably, better filth blockage state distinguishing and identifying effects are achieved, meanwhile, the overall state of the filter screen is represented in a mode of comparing the number of sample areas, and the detection process is simplified and better detection effect is achieved.
Example 3
As shown in FIG. 3, the invention also provides an air conditioner filter screenThe main equipment of the dust reminding device comprises an excitation light source module, a filter screen 3 comprising a pressure sensitive coating 4, an image information acquisition module, an image processing module 7 and the like, wherein the excitation light source module comprises light source equipment 1 and a filtering device 2, the light source equipment 1 emits incident light with the wavelength range matched with the optimal absorption wavelength of the selected coating, the incident light mainly comprises ultraviolet light or visible light, and the filtering device 2 carries out purification treatment on the incident light; the measured object comprises a filter screen 3, a primer layer and a pressure sensitive coating 4, the thickness of the primer layer is 15-20 microns, the thickness of the pressure sensitive coating is 20-30 microns, and the primer is sprayed on the surface of the filter screen material to eliminate the influence of the filter screen material on the luminous performance of the pressure sensitive material and enhance the reflection effect on fluorescence or phosphorescence excited by an excitation light source; the image information acquisition module comprises a filtering device 5 and a CCD camera 6, wherein the filtering device 5 eliminates the influence of other light rays, the CCD camera 6 acquires the image of a specific area of the filter screen sprayed with the pressure sensitive coating, the specific area is a tiny circular area with the area A on the filter screen, and if A is 0.5cm2And the surface of the filter screen has i (i is more than or equal to 20 and less than or equal to 30) areas, and each area is correspondingly marked as NiAnd transmitted to the image processing module 7 for subsequent processing; the image processing module 7 is connected with the controller 8, and is mainly used for processing the acquired image to obtain the pressure distribution of the area where the pressure sensitive coating is sprayed on the filter screen 3, and averaging the pressure distribution of each area to obtain i pressure values corresponding to FiThe relevant pressure data is transmitted to the controller 8 of the air conditioner for subsequent control operations.
According to the technical scheme, the dirty blockage state of the filter screen in the operation process of the air conditioner is monitored by utilizing a Pressure Sensitive Paint (PSP) measuring technology, the pressure on the filter screen in different dirty blockage states is different, different dirty blockage states of the filter screen can be reflected according to different pressures, dust removal reminding in different degrees is further carried out, effective monitoring of the state of the filter screen is achieved, the pressure sensitive paint measuring technology is applied, the detection cost is low, the preparation time is short, the detection result is high in accuracy, meanwhile, the technology is good in stability, and the problem of flow field interference caused by the traditional detection technology can be well solved.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A dust removal reminding control method for a filter screen is characterized in that a pressure sensitive paint measuring technology is adopted to detect the filth blockage state of the filter screen, and specifically comprises the following steps: spraying a pressure sensitive coating (4) on the air-conditioning filter screen, acquiring an output pressure value F of the pressure sensitive coating (4) area, and acquiring a reference pressure value F under the condition that the filter screen is completely clean according to the output pressure value F0Judging the filth blockage state of the air conditioner filter screen;
the method comprises the following steps that after the air conditioner receives a starting instruction, the pressure value of a pressure sensitive coating (4) on an air conditioner filter screen is obtained; judging whether the pressure value meets the preset condition of a completely clean state or not;
if the pressure value meets the preset condition of a completely clean state, the air conditioner does not enter a filter screen filth blockage detection process when receiving a shutdown signal; if the pressure value does not meet the preset condition of a completely clean state, the air conditioner enters a filter screen filth blockage detection process when receiving a shutdown signal;
after the air conditioner enters a filter screen filth blockage detection flow, the outer unit of the air conditioner is normally shut down, and the inner fan rotates at the rotating speed r0Operating, ventilating, stabilizing the working condition of the internal machine, acquiring an output pressure value F at regular intervals, averaging the output pressure values F detected for multiple times, and averaging the average pressure value FaveSending the data to an internal machine controller;
calculating the average pressure value FaveExceeding the reference pressure value F0Ratio ψ of: psi ═ Fave-F0)/F0；
Determining different filth blockage states of the filter screen according to the proportion psi;
and after the steps are executed, the air conditioner indoor unit is turned off.
2. The filter screen dust removal reminding control method according to claim 1, wherein the preset condition of the completely clean state is that the output pressure values of all the regions are less than or equal to a reference pressure value: f is less than or equal to F0。
3. The dust removal reminding control method of the filter screen according to claim 1, wherein i areas coated with the pressure sensitive coating (4) are arranged and distributed on the surface of the filter screen, and the area number is NiReference pressure value of each region is Fi0Separately obtaining the output pressure value F of each regioni。
4. The method for controlling a dust removal reminder for a filter screen according to claim 3, wherein the pressure ratio is divided into k different ranges, and the number n of the regions falling within the corresponding ranges is respectively accumulated for different filth blockage states of the filter screenk-1。
5. The filter screen dust removal reminding control method according to claim 4, wherein k is 5, that is, the pressure ratio is divided into 5 ranges:
if tiIf the number of the data detection areas is less than 0, judging that the data detection in the area has errors, rejecting the data, and accumulating the number of the data detection areas with errors to be n0；
If 0 is less than or equal to psiiIf a is less than or equal to a, the area is judged to be in a clean state, and the number of the areas with the clean state of the filter screen is accumulated to be n1；
(iii) if a < psiiB is less than or equal to b, the area is judged to be in a slight filth blockage state, and the number of the areas with the slight filth blockage state of the filter screen is accumulated to be n2；
If b < psiiC is less than or equal to c, the area is judged to be in a general filth blockage state, and the number of the areas with the general filth blockage state of the filter screen is accumulated to be n3；
P if tiIf the number of the areas is more than c, the area is judged to be in a serious filthy blockage state, and the number of the areas in the serious filthy blockage state of the filter screen is accumulated to be n4；
There exists a corresponding relationship n1+n2+n3+n4＝i-n0(ii) a a, b and c are proportional range values.
6. The filter screen dust removal reminding control method according to claim 4,
if n isk-1And displaying the filter screen state corresponding to the range on the internal machine display panel if the value is more than or equal to h.i, otherwise, not executing any dirty blockage prompting operation by the display panel, wherein h is a proportionality coefficient, and i is the total number of the regions.
7. The filter screen dust removal reminding control method according to claim 6, wherein the proportional parameter h takes a value of 0.5, namely:
if n0When the filter screen filth blockage detection system fault is more than or equal to 0.5i, the system prompts a user to report repair; if n is0When the frequency is less than 0.5i, the system normally carries out the next judgment operation;
if n1≥0.5(i-n0) When the current filter screen is in a clean state, the system prompts the clean state of the filter screen;
(r if n)2≥0.5(i-n0) When the current filter screen is in a slight filth blockage state, the system prompts that the filter screen is slightly filth blockage;
if n3≥0.5(i-n0) When the current filter screen is in a general filth blockage state, the system prompts that the filter screen is generally filth blockage;
if n4≥0.5(i-n0) When the current filter screen is in a serious filth blockage state, the system prompts that the filter screen is seriously filth-blocked;
if the display panel does not belong to any range of the first to the fifth, the display panel does not execute any filth prompting operation.
8. A filter screen dust removal reminding device, characterized in that the air conditioner filter screen dust removal reminding device is used for executing the air conditioner filter screen dust removal reminding control method according to any one of claims 1 to 7, and the air conditioner filter screen dust removal reminding device comprises: the device comprises an excitation light source module, a filter screen (3) containing a pressure sensitive coating (4), an image information acquisition module and an image processing module (7).
9. The filter screen dust removal reminding device according to claim 8, wherein the excitation light source module comprises a light source device (1) and a filter device (2), the light source device emits incident light with a wavelength range matching with the optimal absorption wavelength of the selected paint, and the filter device purifies the incident light.
10. The filter screen dust removal reminding device according to claim 8, wherein the image information acquisition module comprises a filter device (5) and a CCD camera (6), wherein the filter device (5) eliminates the influence of other light rays, and the CCD camera (6) acquires an image of the area of the filter screen (3) coated with the pressure sensitive coating (4) and transmits the image to the image processing module (7) for subsequent processing.
11. The filter screen dust removal reminding device according to claim 8, wherein the image processing module (7) is connected with the controller (8) and mainly processes the acquired image to obtain the output pressure value of the area of the filter screen coated with the pressure-sensitive coating, and calculates the average pressure value F from the output pressure valueaveAnd sends the data to the controller.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010414104.2A CN111637591B (en) | 2020-05-15 | 2020-05-15 | Filter screen dust removal reminding control method and dust removal reminding device |
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| CN114396699A (en) * | 2021-12-13 | 2022-04-26 | 珠海格力电器股份有限公司 | Filter screen cleaning method, filter screen cleaning device and air conditioner |
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