CN109140691B - Automatic detection method for filth blockage condition of filter screen for air conditioner - Google Patents
Automatic detection method for filth blockage condition of filter screen for air conditioner Download PDFInfo
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Abstract
An automatic detection method for filth blockage of a filter screen for an air conditioner comprises the following steps: s1: powering on the air conditioner, electrifying the luminous body, detecting the current light intensity by the photosensitive sensor, and recording as the initial light intensity lambda 1; s2: detecting the current light intensity lambda and judging whether the current light intensity lambda is larger than lambda 1 or not; if not, go to step S3; s3: detecting the current light intensity lambda, and judging whether the current light intensity lambda is smaller than (lambda 1-N1); if yes, sending a filth blockage alarm prompt, and executing step S4; s4: detecting the current light intensity lambda, and judging whether the current light intensity lambda is greater than (lambda 1-N2); if yes, clearing the filth blockage and alarming for reminding. The detection method is simple, can dynamically update the detection threshold value, has high detection accuracy and precision, and can provide more humanized filter screen filth blockage reminding for a user.
Description
Technical Field
The invention relates to the field of air conditioners, in particular to an automatic detection method for filth blockage of a filter screen for an air conditioner.
Background
The filter screen that sets up in the air conditioner is after using a period, and the filter screen can the deposition, needs the user to regularly wash, otherwise breeds the bacterium easily and causes secondary pollution to the air supply volume and the air supply distance of air conditioner are influenced to the dust, thereby influence the refrigeration and the heating effect of air conditioner. Most filter screen filth blockage detection methods in the market judge by calculating the service time of the air conditioner, namely judge the accumulated running time of an air conditioner fan, and report a filter screen cleaning prompt after a threshold value is exceeded. However, due to the fact that the air conditioners are different in use environment and different in dust deposition conditions of the filter screen, it is obviously unreasonable to judge whether the filter screen is dirty or blocked according to the operation time of the air conditioners.
At present, a method for judging the filth blockage condition of a filter screen by detecting operation parameters of related components on an air conditioner, for example, a device for judging the filth blockage of the filter screen by detecting changes of motor operation power, inner pipe temperature, air volume and the like, is available. However, these solutions all indirectly determine the filth blockage condition of the filter screen through the operation parameters of the related components on the air conditioner, and have the following technical problems:
1. when the operation of the motor, the inner pipe or the air duct fluctuates or is abnormal, false alarm can be caused, and the made filth blockage judgment is inaccurate.
2. Generally, different thresholds are set for different operation modes of the air conditioner to judge filth blockage, and the detection method is complicated.
3. Only the filth blockage condition of the filter screen of the air conditioner is detected, but the cleaning condition of the filter screen cannot be detected.
4. The set threshold value is a fixed value, and cannot be adjusted according to the use degree of the air conditioner filter screen.
The present invention has been made to solve the above problems.
Disclosure of Invention
The invention aims to provide an automatic detection method for filth blockage of a filter screen for an air conditioner.
In order to achieve the purpose, the invention adopts the following technical scheme: an automatic detection method for filth blockage of a filter screen of an air conditioner comprises the following steps: the automatic detection device comprises an evaporator, a base, an air outlet, a cross-flow fan blade and a filter screen, and is characterized in that at least one photosensitive sensor is arranged on one side of the filter screen, at least one luminous body is arranged on the other side of the filter screen, and the automatic detection method comprises the following steps:
s1: powering on the air conditioner, electrifying the luminous body, detecting the current light intensity by the photosensitive sensor, and recording as the initial light intensity lambda 1;
s2: detecting the current light intensity lambda and judging whether the current light intensity lambda is larger than lambda 1 or not; if not, go to step S3;
s3: detecting the current light intensity lambda, and judging whether the current light intensity lambda is smaller than (lambda 1-N1); if yes, sending a filth blockage alarm prompt, and executing step S4;
s4: detecting the current light intensity lambda, and judging whether the current light intensity lambda is greater than (lambda 1-N2); if yes, clearing the filth blockage and alarming for reminding.
Preferably, the step S2 includes: detecting the current light intensity lambda, and judging whether the current light intensity lambda lasts for T1 minutes and is greater than lambda 1; if yes, updating the lambda 1 value to lambda, and executing the step S2 again; if not, go to step S3.
Preferably, the step S3 includes: detecting the current light intensity lambda, and judging whether the current light intensity lambda lasts for T2 minutes and is less than (lambda 1-N1); if yes, sending a filth blockage alarm prompt, and executing step S4; if not, go to step S2; the N1 is a predetermined value.
Preferably, the step S4 includes: detecting the current light intensity lambda, and judging whether the current light intensity lambda lasts for T3 minutes and is greater than (lambda 1-N2); if yes, clearing the filth blockage and alarming; if not, sending out the filth blockage alarm again, and executing the step S4 again, wherein N2 is a preset value.
Preferably, the N1 is greater than N2.
Preferably, the step S4 further includes: detecting the current light intensity lambda, and judging whether the current light intensity lambda lasts for T3 minutes and is greater than (lambda 1-N2); if yes, clearing the filth blockage alarm reminding, and executing the step S2 again; if not, continuing to send out the filth blockage alarm prompt, and executing the step S4 again.
Preferably, the light emitter may be one of a light emitting diode, a fluorescent lamp, an incandescent lamp, a tungsten halogen lamp, or a gas discharge lamp, or a combination thereof.
Preferably, the filter screen filth blockage alarm reminding comprises: controlling a buzzer to sound; and/or controlling a preset indicator lamp on the operation panel to flicker; and/or disable power on.
The beneficial technical effects are as follows: compared with the prior art, the method and the device have the advantages that the filth blockage and cleaning condition judgment is directly carried out by detecting the light intensity transmitted by the filter screen, so that the filth blockage detection accuracy of the filter screen can be improved, the false alarm rate is reduced, and the cleaning condition can be detected. In addition, the filter screen filth blockage conditions under different operation modes do not need to be distinguished and judged, and the judgment method is simpler. More importantly, the invention can dynamically update the detection threshold value, has higher detection accuracy and precision, and can provide more humanized filter screen filth blockage reminding for users.
Drawings
FIG. 1 is a schematic flow chart of an automatic detection method for filth blockage of a filter screen for an air conditioner according to the present invention
FIG. 2 is a schematic view of the installation of the photosensitive sensor and the illuminant of the present invention
To further clarify the structure and connection between the various components of the present invention, the following reference numerals are given and described.
1. An air conditioner; 2. a filter screen; 3. a light emitter; 4. a photosensitive sensor; 5. an evaporator; 6. a base; 7. an air outlet; 8. cross-flow fan blade
The technical scheme of the invention can be more clearly understood and explained by combining the specific embodiments of the invention through the reference sign descriptions.
Detailed Description
As shown in fig. 1 and 2, an automatic detection method for filth blockage of a filter screen of an air conditioner is provided, wherein the air conditioner comprises: the automatic detection device comprises an evaporator 5, a base 6, an air outlet 7, a cross-flow fan blade 8 and a filter screen 2, and is characterized in that at least one photosensitive sensor 4 is arranged on one side of the filter screen 2, and at least one luminous body 3 is arranged on the other side of the filter screen, and the automatic detection method comprises the following steps: s1: the air conditioner 1 is powered on, the luminous body 3 is powered on, and the photosensitive sensor 4 detects the current light intensity which is recorded as initial light intensity lambda 1; s2: detecting the current light intensity lambda and judging whether the current light intensity lambda is larger than lambda 1 or not; if not, go to step S3; s3: detecting the current light intensity lambda, and judging whether the current light intensity lambda is smaller than (lambda 1-N1); if yes, sending a filth blockage alarm prompt, and executing step S4; s4: detecting the current light intensity lambda, and judging whether the current light intensity lambda is greater than (lambda 1-N2); if yes, clearing the filth blockage and alarming for reminding.
The invention judges whether the filter screen 2 for the air conditioner 1 is dirty or not or the cleaning condition of the filter screen 2 is generated by detecting the light intensity penetrating through the filter screen 2. Because air conditioner 1 is in the use, other impurity such as dust can be constantly in filter screen 2 department deposit for the luminous intensity that sees through filter screen 2 also can attenuate thereupon, so, filter screen 2 dirty stifled condition is different, and the luminous intensity that sees through filter screen 2 also can corresponding change. Consequently, the accessible is in 2 one sides of filter screen set up at least one photosensitive sensor 4 and detect the filter screen 2 and see through the light intensity decay condition, and see through the filter screen 2 and see through the stifled condition of light intensity decay condition and judge the filth of filter screen 2, just send the filth stifled warning of filter screen 2 to the user after seeing through the light intensity decay to the certain degree, and after the user washs filter screen 2, the luminous intensity that sees through filter screen 2 can resume relatively higher level, detect through the luminous intensity that sees through filter screen 2 after wasing, can carry out automated inspection to the washing condition of filter screen 2.
Specifically, considering that the intensity of light passing through the filter screen 2 is related to time, environment, weather and other factors under natural lighting conditions, the filth blockage condition of the filter screen 2 cannot be accurately judged under natural lighting conditions. Therefore, at least one light emitter 3 is arranged on the filter screen 2 opposite to the photosensor 4, and the light emitter 3 may be one of a light emitting diode, a fluorescent lamp, an incandescent lamp, a halogen tungsten lamp, or a gas discharge lamp, or a combination thereof. By arranging the luminous body 3, the photosensitive sensor 4 can detect a light source with fixed brightness.
Namely, step S1 of the detection method is: the air conditioner (1) is powered on, the luminous body (3) is powered on, and the photosensitive sensor 4 detects the current light intensity and records the current light intensity as the initial light intensity lambda 1.
More specifically, after the step S1 is executed, in consideration of the weak influence of fluctuation of current and the like when the device is started during the startup process, the initial light intensity λ 1 is confirmed within a period of time T1 after the startup, so as to improve the detection accuracy and precision and reduce the false alarm rate. If the current light intensity lambda is greater than lambda 1 for T1 minutes, the initial light intensity lambda 1 is slightly affected by the fluctuation of current and the like when the equipment is started in the starting process, the value of the initial light intensity lambda 1 needs to be updated to the current light intensity lambda, otherwise, the updating is not needed.
Namely, the step S2: detecting the current light intensity lambda and judging whether the current light intensity lambda is larger than lambda 1 or not; if not, go to step S3. Specifically, the step S2 includes: detecting the current light intensity lambda and comparing the current light intensity lambda with the initial light intensity lambda 1; if the current light intensity lambda is greater than lambda 1 for T1 minutes, updating the lambda 1 value to the current light intensity lambda, and executing the step S2 again; s23: if the current light intensity lambda is not greater than the initial light intensity lambda 1 for T1 minutes, go to step S3.
Further, in the use process of the air conditioner 1, as dust and other impurities are continuously deposited on the filter screen 2, the current light intensity λ which can be detected by the photosensitive sensor 4 is attenuated, so that a filth blockage alarm threshold of the filter screen 2 can be preset, the filth blockage alarm threshold is a judgment basis for judging whether the filter screen 2 is filth-blocked or not, in order to improve the detection accuracy, continuous detection is carried out within a certain time T2, and when the current light intensity λ is continuously smaller than the set filth blockage alarm threshold within a certain time T2, filth blockage of the filter screen 2 is judged to occur; when the current light intensity lambda is not less than the preset filth blockage alarm threshold value continuously within a certain time T2, the filter screen 2 is not filth-blocked, and the step S2 is executed again in consideration of the fluctuation of the equipment operation process, so as to confirm the initial light intensity lambda 1 again.
Further, in the prior art, the filth blockage condition of the filter screen 2 is generally determined by setting a fixed filth blockage alarm threshold, which is generally relatively low. For the air conditioner which is just put into use, a healthy environment is provided for a user to a greater extent, and a better running state is provided for the air conditioner at the same time, at the moment, a relatively higher filth blockage alarm threshold value can be set to judge the filth blockage condition of the filter screen 2, namely, when the filter screen 2 is not seriously filth blocked, a filth blockage alarm is sent to the user to remind the user to clean the filter screen 2. As the operation time of the air conditioner 1 increases, the amount of impurities remaining at the filter net 2, which are difficult to remove, inevitably increases even after careful cleaning. At this time, if the filth blockage alarm threshold value is still set to be high, the air conditioner 1 frequently sends out a filth blockage alarm to the user in the operation process to remind the user to clean the filter screen 2, and the use of the user is influenced. In view of the above problems, the invention provides a more humanized filth blockage alarm scheme for users, and the filth blockage alarm threshold value can be gradually reduced along with the deepening of the use degree of the filter screen. The visceral congestion alarm threshold is set to be (lambda 1-N1), wherein N1 is a preset value. In the use process of the filter screen 2, the initial light intensity lambda 1 is dynamically updated, so that the visceral congestion alarm threshold value (lambda 1-N1) can be gradually reduced along with the deepening of the use degree of the filter screen 2, and the dynamic adjustment of the visceral congestion alarm threshold value (lambda 1-N1) is realized.
Namely, the step S3: detecting the current light intensity lambda, and judging whether the current light intensity lambda is smaller than (lambda 1-N1); if yes, a filth blockage alarm is sent out, and the step S4 is executed. Specifically, the step S3 includes: detecting the current light intensity lambda, comparing the current light intensity lambda with (lambda 1-N1), if the current light intensity lambda lasts for T2 minutes and is not smaller than (lambda 1-N1), the filter screen 2 is not dirty, executing step S2, and confirming the initial light intensity lambda 1 again; if the current light intensity lambda is less than (lambda 1-N1) continuously for T2 minutes, judging that the filter screen 2 is dirty, sending a dirty blockage alarm prompt of the filter screen 2, reminding a user to clean the filter screen 2, and executing the step S4.
Further, after the user cleans the filter screen 2, the cleaning condition of the filter screen 2 needs to be detected and confirmed, so as to ensure that the cleaning condition of the filter screen 2 is restored to a higher level, and avoid the problem that more impurities which are difficult to remove are remained on the filter screen 2 due to the incomplete long-term cleaning of the filter screen 2. After cleaning, the filter screen 2 can be restored to a relatively high level, and at this time, a clean threshold value can be set, which is a judgment basis for whether the filter screen 2 is cleaned. In order to improve the detection accuracy, continuous detection is carried out within a period of time T3, when the current light intensity lambda is continuously greater than the set clean threshold value within a certain period of time T3, the filter screen 2 is judged to be cleaned by the user, and the filth blockage is cleared and the alarm is given; when the current light intensity lambda is not larger than the set cleaning threshold value continuously within a certain time T3, the filter screen 2 is judged to be not cleaned or not cleaned thoroughly, and a filter screen 2 dirty and blocked reminder is continuously sent to the user to remind the user to clean the filter screen 2.
Similarly, this problem also exists with respect to the filter cleaning condition detection. For the air conditioner which is just put into use, after the filter screen 2 sends dirty blockage, the state of relatively high clean level can be recovered after cleaning, and at the moment, the clean threshold value can be set relatively high. As the use time of the filter net 2 increases, the clean level of the filter net 2 is restored to a relatively low state even after cleaning. At this time, if the cleaning threshold value setting is still high, the air conditioner 1 will frequently send a filth blockage alarm to the user in the operation process, so as to remind the user to clean the filter screen 2, which affects the use of the user. The cleaning threshold value is set to be (lambda 1-N2), the cleaning threshold value (lambda 1-N2) can be gradually reduced along with the increase of the use degree of the filter screen 2 by dynamically updating the initial light intensity lambda 1, the dynamic adjustment of the cleaning threshold value (lambda 1-N2) is realized, in order to effectively limit the cleaning degree of the filter screen 2, the N2 is a preset value, and the N2 is smaller than the N1, so that the cleaning threshold value (lambda 1-N2) is larger than the dirty blockage alarm threshold value (lambda 1-N1). In addition, after the cleaning condition of the filter screen 2 is detected to be qualified, the step S2 is executed, the current light intensity lambda is compared with the initial light intensity lambda 1 again, so that the initial light intensity lambda 1 can be updated in time, and the clean threshold value (lambda 1-N2) and the filth blockage alarm threshold value (lambda 1-N1) can be adjusted in time.
Namely, the step S4: detecting the current light intensity lambda, and judging whether the current light intensity lambda is greater than (lambda 1-N2); if yes, clearing the filth blockage and alarming for reminding. Specifically, the step S4 includes: detecting the current light intensity lambda and comparing the current light intensity lambda with (lambda 1-N2); if the current light intensity lambda is continuously T3 minutes and is larger than (lambda 1-N2), judging that the filter screen 2 is cleaned by the user, clearing the filter screen 2 dirty and blocked alarm prompt, and executing the step S2; if the current light intensity lambda lasts for T2 minutes and is not greater than (lambda 1-N2), judging that the filter screen 2 is dirty and sending out a filter screen 2 dirty and blocked alarm prompt to remind a user of cleaning the filter screen 2, and executing the step S4.
Specifically, the filth blockage alarm reminding of the filter screen 2 comprises the following steps: controlling a buzzer to sound; and/or controlling a preset indicator lamp on the operation panel to flicker; and/or disable power on.
From the above description, it can be seen that the present invention achieves the following technical effects:
compared with the prior art, the method does not simply depend on the accumulation of the service time of the air conditioner 1 to judge the filth blockage of the filter screen 2, does not indirectly judge the filth blockage condition of the filter screen 2 by the aid of the operating parameters of other parts on the air conditioner 1, directly detects the light intensity of the luminous body 3 arranged on the other side of the filter screen 2 by the photosensitive sensor 4 arranged on one side of the filter screen 2 to judge the filth blockage and cleaning condition, can improve the accuracy of filth blockage detection of the filter screen 2, reduce the false alarm rate, and can detect the cleaning condition of the filter screen 2. In addition, the dirty blockage conditions of the filter screen 2 in different running modes do not need to be distinguished and judged, and the judging method is simpler. More importantly, the invention can detect thresholds, such as: the cleaning threshold value (lambda 1-N2) and the filth blockage alarm threshold value (lambda 1-N1) are dynamically updated, so that the method has higher detection accuracy and precision, and can provide more humanized filtration screen filth blockage reminding for a user.
It should be noted that, for those skilled in the art, it is possible to make several improvements and modifications to the present invention without departing from the principle of the present invention, and those improvements and modifications also fall within the protection scope of the claims of the present invention.
Claims (7)
1. An automatic detection method for filth blockage of a filter screen of an air conditioner comprises the following steps: evaporimeter (5), base (6), air outlet (7), through-flow fan blade (8) and filter screen (2), its characterized in that, filter screen (2) one side is provided with at least one photosensitive sensor (4), and the opposite side is provided with at least one luminous body (3), the automated inspection method includes following step:
s1: the air conditioner (1) is powered on, the luminous body (3) is powered on, and the photosensitive sensor (4) detects the current light intensity which is recorded as the initial light intensity lambda 1;
s2: detecting the current light intensity lambda and judging whether the current light intensity lambda is larger than lambda 1 or not; if not, go to step S3;
s3: detecting the current light intensity lambda, and judging whether the current light intensity lambda is smaller than (lambda 1-N1); if yes, sending a filth blockage alarm prompt, and executing step S4;
s4: detecting the current light intensity lambda, and judging whether the current light intensity lambda is greater than (lambda 1-N2); if yes, clearing the filth blockage and alarming;
wherein, step S2 includes: detecting the current light intensity lambda, and judging whether the current light intensity lambda lasts for T1 minutes and is greater than lambda 1; if yes, updating the lambda 1 value to lambda, and executing the step S2 again; if not, go to step S3.
2. The method as claimed in claim 1, wherein the step S3 includes: detecting the current light intensity lambda, and judging whether the current light intensity lambda lasts for T2 minutes and is less than (lambda 1-N1); if yes, sending a filth blockage alarm prompt, and executing step S4; if not, go to step S2; the N1 is a predetermined value.
3. The method as claimed in claim 1, wherein the step S4 includes: detecting the current light intensity lambda, and judging whether the current light intensity lambda lasts for T3 minutes and is greater than (lambda 1-N2); if yes, clearing the filth blockage and alarming; if not, sending out the filth blockage alarm again, and executing the step S4 again, wherein N2 is a preset value.
4. The method as claimed in claim 1, wherein N1 is greater than N2.
5. The method as claimed in claim 1, wherein the step S4 further comprises: detecting the current light intensity lambda, and judging whether the current light intensity lambda lasts for T3 minutes and is greater than (lambda 1-N2); if yes, clearing the filth blockage alarm reminding, and executing the step S2 again; if not, continuing to send out the filth blockage alarm prompt, and executing the step S4 again.
6. The method for automatically detecting filth blockage of the filter screen for the air conditioner as claimed in claim 1, wherein the light emitter (3) can be one of a light emitting diode, a fluorescent lamp, an incandescent lamp, a halogen tungsten lamp or a gas discharge lamp, or a combination thereof.
7. The automatic detection method for filth blockage of the filter screen for the air conditioner as claimed in claim 1, wherein the filth blockage alarm prompt of the filter screen (2) comprises the following steps:
controlling a buzzer to sound; and/or
Controlling the flicker of a preset indicator lamp on the operation panel; and/or
And forbidding the startup.
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| CN110160211A (en) * | 2019-04-28 | 2019-08-23 | 青岛海尔空调器有限总公司 | Air conditioner indoor unit filter gauze cleaning system for prompting and its method and air conditioner |
| CN110388720B (en) * | 2019-07-19 | 2020-08-18 | 珠海格力电器股份有限公司 | Control method and device of air purifier, storage medium and air purifier |
| CN110608509B (en) * | 2019-10-08 | 2020-10-27 | 宁波奥克斯电气股份有限公司 | Filter screen filth blockage detection method and device, air conditioner and storage medium |
| CN111637591B (en) * | 2020-05-15 | 2021-12-31 | 宁波奥克斯电气股份有限公司 | Filter screen dust removal reminding control method and dust removal reminding device |
| CN111947274B (en) * | 2020-07-02 | 2021-09-24 | 珠海格力电器股份有限公司 | Cleaning treatment method for air conditioner filter screen, air conditioner internal unit and air conditioner |
| CN114061022A (en) * | 2020-07-31 | 2022-02-18 | 青岛海尔智能技术研发有限公司 | Dust detection method and device, computer equipment and storage medium |
| CN112378041B (en) * | 2020-11-12 | 2022-05-24 | 海信（山东）空调有限公司 | Air conditioner control method and air conditioner |
| CN112413816B (en) * | 2020-11-27 | 2022-08-02 | 珠海格力节能环保制冷技术研究中心有限公司 | Air conditioner detection method and detection device and air conditioning equipment |
| CN114608142A (en) * | 2020-12-04 | 2022-06-10 | 深圳Tcl新技术有限公司 | Filter screen maintenance method, air conditioner and computer readable storage medium |
| CN112628937A (en) * | 2020-12-12 | 2021-04-09 | 安徽美博智能科技有限公司 | Self-cleaning device and self-cleaning method of shared air conditioner |
| CN113091210B (en) * | 2021-04-09 | 2022-10-28 | 青岛海尔空调器有限总公司 | Method and device for determining cleanliness of dust filter screen, air conditioner and storage medium |
| CN113203181B (en) * | 2021-04-23 | 2024-04-30 | Tcl空调器(中山)有限公司 | Air conditioner indoor unit and cleaning reminding method for filter screen of air conditioner indoor unit |
| CN114563321A (en) * | 2022-01-28 | 2022-05-31 | 山东朗进科技股份有限公司 | Filth blockage judgment method for vehicle-mounted air conditioner filter screen |
| CN114623561B (en) * | 2022-01-28 | 2024-04-02 | 山东朗进科技股份有限公司 | Intelligent diagnosis method of deep ultraviolet ray generation device |
| CN114606709A (en) * | 2022-03-08 | 2022-06-10 | 长虹美菱股份有限公司 | Method and device for detecting filth blockage of filter screen of clothes dryer |
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