Air conditioner filter screen accumulated dust detection device and method, air conditioner indoor unit and air conditioner unit

Abstract

The invention provides an air conditioner filter screen accumulated dust detection device and method, an air conditioner indoor unit and an air conditioner unit. According to the device, through an ultraviolet lamp arranged on the outer side of a filter screen, an ultraviolet photosensitive film arranged on the inner side of the filter screen and a light-emitting diode, when the filter screen is filth-blocked, due to the fact that ultraviolet light received by the ultraviolet photosensitive film becomes less, the color becomes light, and the filter screen is blocked; however, due to filth blockage of the filter screen and weak ultraviolet light received by the photoresistor, the light (light emitting diode) received by the photoresistor is strong, the resistance value is reduced, and the electric signal is strong due to the auxiliary light emitting diode; on the contrary, the light (the light emitting diode) received by the photoresistor is still weaker, the resistance value is increased, and the electric signal is weaker, so that the dust retention information of the filter screen is obtained according to the change of the electric signal flowing through the photoresistor, and a user can be prompted to clean or replace the filter screen in time after the filter screen of the air conditioning equipment is filth-blocked.

Description

Technical Field

[0001] The present invention relates to the technical field of air conditioner cleaning, and in particular to a device and method for detecting dust accumulation on an air conditioner filter, an air conditioner indoor unit and an air conditioner unit. Background Art

[0002] At present, most air conditioners use filters to purify the air. In actual use, dust, hair and other suspended matter in the air will enter the indoor unit, causing the heat exchanger to become dirty and blocked. In serious cases, this will affect the performance of the air conditioner and the user experience. Therefore, the indoor unit of the air conditioner generally adds a filter assembly at the air inlet to prevent some dust from entering the interior.

[0003] As the equipment runs for a long time, a lot of dust will accumulate, and bacteria and microorganisms will also grow. If the filter is not cleaned in time, it will become dirty and clogged, resulting in reduced air conditioning efficiency. Not only will there be odor during the operation of the air conditioner, but it will also easily breed bacteria and cause secondary pollution, affecting the user's use effect and experience. The filter needs to be cleaned and replaced.

[0004] Currently, most of the filters of air-conditioning equipment on the market are cleaned on a scheduled basis. However, these devices are affected by the use environment, frequency of use, etc., and the cleaning and replacement cycles vary. If they are still cleaned on a scheduled basis, some air-conditioning equipment will not be cleaned in time.

[0005] In order to remind users to clean the filter in time, a light-emitting device and a light-receiving device are added to the filter in the prior art. The light-emitting device emits a fixed light intensity, and the light intensity received by the light-receiving device after passing through the filter is compared and attenuated to judge the degree of dust accumulation in the filter.

[0006] However, the problem with this method is that the light-emitting device and the receiving device are easily affected by ambient light, resulting in the inability to accurately judge whether the change in light intensity received by the light receiving device is caused by dust accumulation on the filter or by the influence of ambient light; the unstable light intensity of the light-emitting device also makes it impossible to accurately judge the dirty and blocked state of the filter. Summary of the invention

[0007] The purpose of the present invention is to overcome the above-mentioned technical deficiencies and provide an air-conditioning filter dust accumulation detection device, method, air-conditioning indoor unit and air-conditioning unit to solve the problem in the related technology that the air-conditioning equipment filter is dirty and clogged, and the user cannot be promptly prompted that the filter needs to be cleaned or replaced.

[0008] In order to achieve the above technical objectives, the present invention adopts the following technical solutions:

[0009] According to a first aspect of the present invention, there is provided an air conditioner filter dust detection device, comprising:

[0010] An ultraviolet lamp arranged on the outside of the filter, and an ultraviolet photosensitive film arranged on the inside of the filter;

[0011] A light emitting diode is arranged between the inner side of the filter and the ultraviolet sensitive film;

[0012] A photoresistor, arranged within the shielding range of the ultraviolet photosensitive film;

[0013] A detection module, connected to the photoresistor, and used to detect the electrical signal flowing through the photoresistor;

[0014] The controller is connected to the ultraviolet lamp, the light-emitting diode and the detection module respectively, and is used to obtain dust accumulation information of the filter according to the electrical signal flowing through the photoresistor.

[0015] Preferably, the ultraviolet sensitive film and the photoresistor are arranged at a distance, and the photoresistor is arranged below the ultraviolet sensitive film; or,

[0016] The ultraviolet photosensitive film is wrapped around the periphery of the photoresistor.

[0017] Preferably, the detection module comprises: an ammeter, and the ammeter is connected in series with the photoresistor.

[0018] Preferably, the device further comprises:

[0019] A warning light connected to the controller is arranged on a housing of the air conditioner.

[0020] According to a second aspect of the present invention, there is provided a method for detecting dust accumulation on an air conditioner filter, comprising:

[0021] Detecting the electrical signal flowing through the photoresistor;

[0022] The dust accumulation information of the filter is obtained based on the electrical signal flowing through the photoresistor.

[0023] Preferably, the detecting of the electrical signal flowing through the photoresistor is specifically:

[0024] At every time interval, the current signal flowing through the photoresistor is collected once;

[0025] Each time interval includes at least one time unit, and the duration of the time unit is greater than or equal to the response duration of the photoresistor to the ultraviolet light.

[0026] Preferably, the step of obtaining dust accumulation information of the filter screen according to the electrical signal flowing through the photoresistor includes:

[0027] Calculate the average value of the current signal collected at multiple consecutive time intervals;

[0028] If the average value is greater than or equal to the maximum threshold, it is determined that the filter is seriously dusty and the filter is dirty and clogged;

[0029] If the average value is less than or equal to the minimum threshold, it is determined that the filter has very little dust accumulation and the filter is not dirty or blocked;

[0030] If the average value is between the minimum threshold and the maximum threshold, it is determined that the filter has dust accumulation and needs to be cleaned.

[0031] Preferably, the method further comprises:

[0032] If the average value is greater than or equal to the maximum threshold, the warning light is controlled to be red;

[0033] If the average value is less than or equal to the minimum threshold, the warning light is controlled to be green;

[0034] If the average value is between the minimum threshold value and the maximum threshold value, the warning light is controlled to be yellow.

[0035] Preferably, the method further comprises:

[0036] If it is determined that the filter is seriously dusty and clogged, the air conditioner will be controlled to remove dust first and then work normally;

[0037] If it is determined that the filter has dust and needs to be cleaned, the air conditioner will be automatically cleaned after the operation is completed.

[0038] Preferably, the method further comprises:

[0039] If it is determined that the filter has dust accumulation and needs to be cleaned, the speed of the air conditioner fan is increased to increase the air intake of the air conditioner; the speed is proportional to the size of the average value.

[0040] Preferably, before calculating the average value of the current signals collected at a plurality of consecutive time intervals, the method further comprises:

[0041] Determine whether the current signal flowing through the photoresistor is stable at multiple consecutive time intervals. If so, calculate the average value of the current signal collected at multiple consecutive time intervals. Otherwise, re-collect the current signal flowing through the photoresistor until the current signal is stable.

[0042] Preferably, if the current signal flowing through the photoresistor in three time intervals is continuously collected, the step of determining whether the current signal flowing through the photoresistor is stable in the consecutive multiple time intervals includes:

[0043] Calculate the absolute value of the difference between the current value collected at the third time interval and the current value collected at the second time interval, and record it as a first absolute value;

[0044] Calculate the absolute value of the difference between the current value collected at the second time interval and the current value collected at the first time interval, and record it as a second absolute value;

[0045] If the first absolute value and the second absolute value are equal, or the difference between the first absolute value and the second absolute value is within a preset fluctuation range, it is determined that the current signal flowing through the photoresistor is stable.

[0046] Preferably, collecting the current signal flowing through the photoresistor once every time interval includes:

[0047] After the air conditioner is started, the current signal flowing through the photoresistor is collected every one time unit for the first time; thereafter, the current signal flowing through the photoresistor is collected every five time units.

[0048] According to a third aspect of the present invention, there is provided an air conditioner indoor unit, comprising:

[0049] A processor, and a memory connected to the processor;

[0050] The memory is used to store computer programs;

[0051] The processor is used to call and execute the computer program in the memory to perform the above method.

[0052] According to a fourth aspect of the present invention, there is provided an air conditioning unit, comprising:

[0053] The air conditioner indoor unit mentioned above.

[0054] The technical solution provided by the embodiments of the present invention may have the following beneficial effects:

[0055] Through the ultraviolet lamp arranged on the outside of the filter, the ultraviolet photosensitive film arranged on the inside of the filter, and the light-emitting diode, the less ultraviolet light the ultraviolet photosensitive film receives, the lighter the color and the greater the light transmittance. When the filter is dirty and blocked, the ultraviolet photosensitive film receives less ultraviolet light, the color becomes lighter and the light transmittance becomes greater, but the ultraviolet light received by the photoresistor is still weak due to the dirty and blocked filter. At this time, due to the auxiliary light-emitting diode, the light (light-emitting diode) received by the photoresistor is stronger, the resistance value is reduced, and the electrical signal is stronger; when the filter is not dirty and blocked, the ultraviolet photosensitive film receives more ultraviolet light, the color becomes darker and the light transmittance becomes smaller. At this time, although there is an auxiliary light-emitting diode, the light (light-emitting diode) received by the photoresistor is still weak, the resistance value is increased, and the electrical signal is weak, so that the dust accumulation information of the filter is obtained according to the change of the electrical signal flowing through the photoresistor, so that after the filter of the air-conditioning equipment is dirty and blocked, the user can be reminded in time that the filter needs to be cleaned or replaced.

[0056] Moreover, the technical solution provided by the present invention can reduce the influence of ambient light, avoid the influence of ambient light on detection accuracy, and avoid misjudgment caused by instability of the light-emitting module or the receiving module, thereby improving the accuracy of judging whether the filter is dirty or blocked, and can improve user experience. BRIEF DESCRIPTION OF THE DRAWINGS

[0057] Figure 1 is a schematic structural diagram of a device for detecting dust accumulation on an air conditioner filter according to an exemplary embodiment;

[0058] Figure 2 is a top view of an air conditioner filter dust accumulation detection device after installation according to an exemplary embodiment;

[0059] Figure 3 is a cross-sectional view of an air conditioner filter dust accumulation detection device after installation according to an exemplary embodiment;

[0060] Figure 4 is a flow chart of a method for detecting dust accumulation on an air conditioner filter according to an exemplary embodiment;

[0061] Figure 5 is a linear relationship diagram between the current value detected by the detection module and the degree of dirtiness and clogging of the filter according to an exemplary embodiment;

[0062] Figure 6 The present invention is a flow chart of a method for detecting dust accumulation on an air conditioner filter according to another exemplary embodiment. DETAILED DESCRIPTION

[0063] In order to enable those skilled in the art to better understand the solution of the present application, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present application.

[0064] Embodiment 1

[0065] Figure 1 is a schematic structural diagram of an air conditioner filter dust detection device 10 according to an exemplary embodiment. Figure 1 , the device 10 comprises:

[0066] An ultraviolet lamp 11 is arranged outside the filter, and an ultraviolet photosensitive film 17 is arranged inside the filter;

[0067] A light emitting diode 16 is arranged between the inner side of the filter and the ultraviolet sensitive film 17;

[0068] The photoresistor 12 is arranged within the shielding range of the ultraviolet photosensitive film 17;

[0069] A detection module 13, connected to the photoresistor 12, and used to detect the electrical signal flowing through the photoresistor 12;

[0070] The controller 14 is connected to the ultraviolet lamp 11 , the light emitting diode 16 and the detection module 13 respectively, and is used to obtain dust accumulation information of the filter according to the electrical signal flowing through the photoresistor 12 .

[0071] It should be noted that the outer side of the filter refers to the side of the filter facing the air inlet; the inner side of the filter refers to the side of the filter facing the heat exchanger.

[0072] It should be noted that the wavelength of ultraviolet light is generally divided into three main regions: UVA (320-400nm), UVB (280-320nm) and UVC (100-280nm), while the wavelength of ordinary light-emitting diodes is between 400nm and 700nm. Therefore, a photoresistor made of cadmium sulfide (CdS) material can be selected. Its effective response wavelength range is approximately between 400nm and 700nm, and its sensitivity to green light around 550nm is the highest. This can avoid the influence of ultraviolet light on the photoresistor.

[0073] In this embodiment, the main function of the light emitting diode 16 is to make the diode light pass through the ultraviolet film 17 to react to the photoresistor 12 .

[0074] Assuming that the light-emitting diode 16 is not provided, the light sources received by the photoresistor 12 are natural light and ultraviolet light. The ultraviolet light will reduce the transparency of the photosensitive film. However, if the filter is seriously dirty and clogged, the ultraviolet light received by the photoresistor 12 will also be small, which is contrary to the reaction of the ultraviolet photosensitive film 17, resulting in large errors and irrationality.

[0075] For example, in the absence of the light-emitting diode 16, if the filter is seriously dirty or clogged, the ultraviolet light received by the ultraviolet sensitive film 17 is relatively weak, and the transparency of the photosensitive film is high. However, due to the dirtiness of the filter, the light received by the photoresistor is still relatively weak; if the filter is not seriously dirty or clogged, the ultraviolet light received by the ultraviolet sensitive film 17 is relatively strong, and the transparency of the photosensitive film is low, and the light received by the photoresistor is still relatively weak. This is obviously unreasonable.

[0076] In this embodiment, a light-emitting diode 16 is added, the wavelength of ultraviolet light is less than 400, the wavelength of the light-emitting diode 16 is greater than 400, and the reaction wavelength of the photoresistor is greater than 400. Then the photoresistor 12 is only affected by the light of the light-emitting diode passing through the photosensitive film, and will not be affected by the ultraviolet light. For example: if the filter is seriously dirty and blocked, the ultraviolet light received by the photosensitive film is weak, and the transparency of the film is high. At this time, the light (light-emitting diode) received by the photoresistor is strong, the resistance value is reduced, and the current is large. If the filter is not dirty and blocked, the ultraviolet light received by the photosensitive film is strong, and the transparency of the film is low, then at this time, the light (light-emitting diode) received by the photoresistor is weak, the resistance value is increased, and the current is small.

[0077] In specific practice, the installation diagram of the air conditioner filter dust detection device provided in this embodiment is as follows: Figure 2 and Figure 3 The air conditioner filter dust detection device provided by the present invention can be used for any form of filter, and has a simple structure and low cost.

[0078] It can be understood that the technical solution provided by this embodiment is that the less ultraviolet light the ultraviolet light film receives, the lighter the color and the greater the transmittance. When the filter is dirty and blocked, the color becomes lighter and the transmittance becomes greater because the ultraviolet light film receives less ultraviolet light, but the ultraviolet light received by the photoresistor is still weak due to the dirty and blocked filter. At this time, due to the assistance of the light-emitting diode, the light (light-emitting diode) received by the photoresistor is stronger, the resistance value is reduced, and the electrical signal is stronger; when the filter is not dirty and blocked, the color becomes darker and the transmittance becomes smaller because the ultraviolet light film receives more ultraviolet light. At this time, although there is an auxiliary light-emitting diode, the light (light-emitting diode) received by the photoresistor is still weak, the resistance value is increased, and the electrical signal is weak, so that the dust accumulation information of the filter is obtained according to the change of the electrical signal flowing through the photoresistor, so that after the filter of the air-conditioning equipment is dirty and blocked, the user can be prompted in time that the filter needs to be cleaned or replaced.

[0079] Moreover, the technical solution provided in this embodiment can reduce the influence of ambient light, avoid the influence of ambient light on detection accuracy, and avoid misjudgment caused by instability of the light-emitting module or the receiving module, thereby improving the accuracy of judging whether the filter is dirty or blocked, and can improve user experience.

[0080] Preferably, see Figure 1 , the ultraviolet photosensitive film 17 and the photoresistor 12 are arranged at intervals, and the photoresistor 12 is arranged below the ultraviolet photosensitive film 17; or,

[0081] The ultraviolet photosensitive film 17 is wrapped around the photoresistor 12 .

[0082] Preferably, the detection module 13 includes an ammeter, and the ammeter is connected in series with the photoresistor 12 .

[0083] Under no light or very low light conditions, the resistance of the photoresistor is very high. Since the supply voltage is the same, when the resistance of the photoresistor is the highest, the current measured by the ammeter is the smallest.

[0084] Under strong light conditions, the electrons in the semiconductor material in the photoresistor will be excited and jump from the valence band to the conduction band to form electron-hole pairs, which increases the conductivity of the semiconductor and thus reduces the resistance value. Since the supply voltage is the same, when the resistance of the photoresistor is the lowest, the current measured by the ammeter is the highest.

[0085] Preferably, the device further comprises:

[0086] A warning light 15 connected to the controller is provided on the housing of the air conditioner.

[0087] The technical solution provided in this embodiment, a feasible control method may be:

[0088] Before the air conditioner is started for the first time, a minimum threshold value Imin of the current value corresponding to when the filter is not dirty or clogged and a maximum threshold value Imax of the current value corresponding to when the filter is dirty or clogged are tested and set.

[0089] The minimum threshold Imin and the maximum threshold Imax are set according to historical experience values ​​or experimental data, and can also be set according to user needs.

[0090] If the collected current value I≥Imax, the filter must be cleaned and the warning light is red; if I≤Imin, the filter is not dirty or blocked and the warning light is green; if Imin<I<Imax, the warning light is yellow, prompting the user to clean the filter.

[0091] It can be understood that the technical solution provided in this embodiment provides different prompt signals for different degrees of dirt and blockage according to the detection results, which is convenient for users to distinguish and take corresponding measures to clean up in time, thereby extending the service life of the air conditioner.

[0092] Embodiment 2

[0093] Figure 4 is a flow chart of a method for detecting dust accumulation on an air conditioner filter according to an exemplary embodiment. Figure 4 , the method comprising:

[0094] Step S11, detecting the electrical signal flowing through the photoresistor;

[0095] Step S12: Obtain dust accumulation information of the filter according to the electrical signal flowing through the photoresistor.

[0096] It should be noted that the technical solution provided in this embodiment, in specific practice, is loaded into the controller of the first embodiment and can be reused and run in the controller of the indoor unit of the air conditioner.

[0097] In specific practice, the installation diagram of the air conditioner filter dust detection device provided in this embodiment is as follows: Figure 2 and Figure 3 The air conditioner filter dust detection device provided by the present invention can be used for any form of filter, and has a simple structure and low cost.

[0098] It can be understood that the technical solution provided by this embodiment is that the less ultraviolet light the ultraviolet light film receives, the lighter the color and the greater the transmittance. When the filter is dirty and blocked, the color becomes lighter and the transmittance becomes greater because the ultraviolet light film receives less ultraviolet light, but the ultraviolet light received by the photoresistor is still weak due to the dirty and blocked filter. At this time, due to the assistance of the light-emitting diode, the light (light-emitting diode) received by the photoresistor is stronger, the resistance value is reduced, and the electrical signal is stronger; when the filter is not dirty and blocked, the color becomes darker and the transmittance becomes smaller because the ultraviolet light film receives more ultraviolet light. At this time, although there is an auxiliary light-emitting diode, the light (light-emitting diode) received by the photoresistor is still weak, the resistance value is increased, and the electrical signal is weak, so that the dust accumulation information of the filter is obtained according to the change of the electrical signal flowing through the photoresistor, so that after the filter of the air-conditioning equipment is dirty and blocked, the user can be prompted in time that the filter needs to be cleaned or replaced.

[0099] Moreover, the technical solution provided in this embodiment can reduce the influence of ambient light, avoid the influence of ambient light on detection accuracy, and avoid misjudgment caused by instability of the light-emitting module or the receiving module, thereby improving the accuracy of judging whether the filter is dirty or blocked, and can improve user experience.

[0100] In specific practice, the electrical signal flowing through the photoresistor is detected as follows:

[0101] At every time interval, the current signal flowing through the photoresistor is collected once;

[0102] Each time interval includes at least one time unit, and the duration of the time unit is greater than or equal to the response duration of the photoresistor to the ultraviolet light.

[0103] It should be noted that the time unit is set according to historical experience values ​​or experimental data. For example, the time unit T is set to 60S.

[0104] After the air conditioner is started, since the UV photosensitive film and photoresistor have a certain response time to light, each detection will last for T=60S of light. Taking the photoresistor made of cadmium sulfide (CdS) material as an example, when the cadmium sulfide photoresistor changes from a no light or low light environment to a strong light environment, the resistance of the photoresistor will drop rapidly. The rise time is usually short, generally in milliseconds (ms). When the cadmium sulfide photoresistor changes from a strong light environment to a no light or low light environment, the resistance of the photoresistor will gradually return to a higher value. The fall time is usually longer than the rise time, which may be in the range of milliseconds to several seconds. This is mainly because it takes time for electron-hole pairs to recombine. Therefore, it is necessary to leave sufficient reaction time for the photoresistor. Setting it to 60s is sufficient and not too long.

[0105] In specific practice, the step S12 of obtaining dust accumulation information of the filter according to the electrical signal flowing through the photoresistor includes:

[0106] Calculate the average value of the current signal collected at multiple consecutive time intervals;

[0107] If the average value is greater than or equal to the maximum threshold value Imax, it is determined that the filter is seriously dusty and the filter is dirty and clogged;

[0108] If the average value is less than or equal to the minimum threshold value Imin, it is determined that the filter has very little dust accumulation and the filter is not dirty or blocked;

[0109] If the average value is between the minimum threshold value Imin and the maximum threshold value Imax, it is determined that the filter has dust accumulation and needs to be cleaned.

[0110] Preferably, the method further comprises:

[0111] If the average value is greater than or equal to the maximum threshold value Imax, the warning light is controlled to be red;

[0112] If the average value is less than or equal to the minimum threshold value Imin, the warning light is controlled to be green;

[0113] If the average value is between the minimum threshold value Imin and the maximum threshold value Imax, the warning light is controlled to be yellow.

[0114] Before the air conditioner is started for the first time, a minimum threshold value Imin of the current value corresponding to when the filter is not dirty or clogged and a maximum threshold value Imax of the current value corresponding to when the filter is dirty or clogged are tested and set.

[0115] The minimum threshold Imin and the maximum threshold Imax are set according to historical experience values ​​or experimental data, and can also be set according to user needs.

[0116] If the collected current value I≥Imax, the filter must be cleaned and the warning light is red; if I≤Imin, the filter is not dirty or blocked and the warning light is green; if Imin<I<Imax, the warning light is yellow, prompting the user to clean the filter.

[0117] See also Figure 5 The resistance value of the photoresistor is inversely proportional to the light intensity, that is, the stronger the light, the lower the resistance; the weaker the light, the higher the resistance. This relationship is not linear, but as the light intensity increases, the resistance value will gradually decrease. Therefore, the detection current value is inversely proportional to the degree of dirtiness and blockage.

[0118] Preferably, the method further comprises:

[0119] If it is determined that the filter is seriously dusty and clogged, the air conditioner will be controlled to remove dust first and then work normally;

[0120] If it is determined that the filter has dust and needs to be cleaned, the air conditioner will be automatically cleaned after the operation is completed.

[0121] Preferably, the method further comprises:

[0122] If it is determined that the filter has dust accumulation and needs to be cleaned, the speed of the air conditioner fan is increased to increase the air intake of the air conditioner; the speed is proportional to the size of the average value.

[0123] In specific practice, before calculating the average value of the current signal collected at multiple consecutive time intervals, the method further includes:

[0124] Determine whether the current signal flowing through the photoresistor is stable at multiple consecutive time intervals. If so, calculate the average value of the current signal collected at multiple consecutive time intervals. Otherwise, re-collect the current signal flowing through the photoresistor until the current signal is stable.

[0125] Preferably, if the current signal flowing through the photoresistor in three time intervals is continuously collected, the step of determining whether the current signal flowing through the photoresistor is stable in the consecutive multiple time intervals includes:

[0126] Calculate the absolute value of the difference between the current value collected at the third time interval and the current value collected at the second time interval, and record it as a first absolute value;

[0127] Calculate the absolute value of the difference between the current value collected at the second time interval and the current value collected at the first time interval, and record it as a second absolute value;

[0128] If the first absolute value and the second absolute value are equal, or the difference between the first absolute value and the second absolute value is within a preset fluctuation range, it is determined that the current signal flowing through the photoresistor is stable.

[0129] Specifically, collecting the current signal flowing through the photoresistor once at every time interval includes:

[0130] After the air conditioner is started, the current signal flowing through the photoresistor is collected every one time unit for the first time; thereafter, the current signal flowing through the photoresistor is collected every five time units.

[0131] For example, the air conditioner is started, the detection module is started, and after time T, the ammeter reads the current value at this time and records it as I1. After the air conditioner runs for 5T, the current value I2 is recorded again. After the air conditioner runs for 10T, the current value I3 is recorded. (Errors may occur if the air conditioner is measured only once. Testing and taking the average value after 1 minute, 5 minutes, and 10 minutes of startup can minimize the impact of errors. In addition, voltage instability may occur at the beginning of startup, and this step can eliminate the impact.) If |I3-I2| is approximately equal to |I2-I1|, the detection is valid. If this condition is not met, I4 is detected after running for another 5T, and the average value I is compared with Imin and Imax.

[0132] It can be understood that the technical solution provided in this embodiment improves the accuracy of judging whether the filter is dirty or blocked, and can improve the user experience.

[0133] Furthermore, according to the detection results, different prompt signals are given for different degrees of dirt and blockage, which makes it easy for users to distinguish and take corresponding measures to clean up in time, thereby extending the service life of the air conditioner.

[0134] Embodiment 3

[0135] Figure 6 is a flow chart of a method for detecting dust accumulation on an air conditioner filter according to another exemplary embodiment. Figure 6 , the method comprising:

[0136] Step S21, the air conditioner is started, and the detection module is started;

[0137] Step S22, after time T, the current value read by the ammeter is recorded as I1, after the air conditioner runs for 5T, the current value I2 is recorded again, after the air conditioner runs for 10T, the current value I3 is recorded;

[0138] Step S23, if |I3-I2|≈|I2-I1|, take the average value I of the detected current; otherwise, run for another 5T and then detect I4, and then take the average value I of the detected current;

[0139] Step S24, if the collected current value I≥Imax, the filter must be cleaned and the warning light is red; if I≤Imin, the filter is not dirty and blocked, and the warning light is green; if Imin<I<Imax, the warning light is yellow, prompting the user to clean the filter.

[0140] It should be noted that the technical solution provided in this embodiment, in specific practice, is loaded into the controller of the first embodiment and can be reused and run in the controller of the indoor unit of the air conditioner.

[0141] It can be understood that the technical solution provided by this embodiment is that the less ultraviolet light the ultraviolet light film receives, the lighter the color and the greater the transmittance. When the filter is dirty and blocked, the color becomes lighter and the transmittance becomes greater because the ultraviolet light film receives less ultraviolet light, but the ultraviolet light received by the photoresistor is still weak due to the dirty and blocked filter. At this time, due to the assistance of the light-emitting diode, the light (light-emitting diode) received by the photoresistor is stronger, the resistance value is reduced, and the electrical signal is stronger; when the filter is not dirty and blocked, the color becomes darker and the transmittance becomes smaller because the ultraviolet light film receives more ultraviolet light. At this time, although there is an auxiliary light-emitting diode, the light (light-emitting diode) received by the photoresistor is still weak, the resistance value is increased, and the electrical signal is weak, so that the dust accumulation information of the filter is obtained according to the change of the electrical signal flowing through the photoresistor, so that after the filter of the air-conditioning equipment is dirty and blocked, the user can be prompted in time that the filter needs to be cleaned or replaced.

[0142] Moreover, the technical solution provided in this embodiment can reduce the influence of ambient light, avoid the influence of ambient light on detection accuracy, and avoid misjudgment caused by instability of the light-emitting module or the receiving module, thereby improving the accuracy of judging whether the filter is dirty or blocked, and can improve user experience.

[0143] Embodiment 4

[0144] According to an exemplary embodiment, an air conditioner indoor unit is shown, comprising:

[0145] A processor, and a memory connected to the processor;

[0146] The memory is used to store computer programs;

[0147] The processor is used to call and execute the computer program in the memory to perform the above method.

[0148] It can be understood that the technical solution provided by this embodiment is that the less ultraviolet light the ultraviolet light film receives, the lighter the color and the greater the transmittance. When the filter is dirty and blocked, the color becomes lighter and the transmittance becomes greater because the ultraviolet light film receives less ultraviolet light, but the ultraviolet light received by the photoresistor is still weak due to the dirty and blocked filter. At this time, due to the assistance of the light-emitting diode, the light (light-emitting diode) received by the photoresistor is stronger, the resistance value is reduced, and the electrical signal is stronger; when the filter is not dirty and blocked, the color becomes darker and the transmittance becomes smaller because the ultraviolet light film receives more ultraviolet light. At this time, although there is an auxiliary light-emitting diode, the light (light-emitting diode) received by the photoresistor is still weak, the resistance value is increased, and the electrical signal is weak, so that the dust accumulation information of the filter is obtained according to the change of the electrical signal flowing through the photoresistor, so that after the filter of the air-conditioning equipment is dirty and blocked, the user can be prompted in time that the filter needs to be cleaned or replaced.

[0149] Moreover, the technical solution provided in this embodiment can reduce the influence of ambient light, avoid the influence of ambient light on detection accuracy, and avoid misjudgment caused by instability of the light-emitting module or the receiving module, thereby improving the accuracy of judging whether the filter is dirty or blocked, and can improve user experience.

[0150] Embodiment 5

[0151] According to an exemplary embodiment, an air conditioning unit is shown, comprising:

[0152] The air conditioner indoor unit mentioned above.

[0153] It can be understood that the technical solution provided by this embodiment is that the less ultraviolet light the ultraviolet light film receives, the lighter the color and the greater the transmittance. When the filter is dirty and blocked, the color becomes lighter and the transmittance becomes greater because the ultraviolet light film receives less ultraviolet light, but the ultraviolet light received by the photoresistor is still weak due to the dirty and blocked filter. At this time, due to the assistance of the light-emitting diode, the light (light-emitting diode) received by the photoresistor is stronger, the resistance value is reduced, and the electrical signal is stronger; when the filter is not dirty and blocked, the color becomes darker and the transmittance becomes smaller because the ultraviolet light film receives more ultraviolet light. At this time, although there is an auxiliary light-emitting diode, the light (light-emitting diode) received by the photoresistor is still weak, the resistance value is increased, and the electrical signal is weak, so that the dust accumulation information of the filter is obtained according to the change of the electrical signal flowing through the photoresistor, so that after the filter of the air-conditioning equipment is dirty and blocked, the user can be prompted in time that the filter needs to be cleaned or replaced.

[0154] Moreover, the technical solution provided in this embodiment can reduce the influence of ambient light, avoid the influence of ambient light on detection accuracy, and avoid misjudgment caused by instability of the light-emitting module or the receiving module, thereby improving the accuracy of judging whether the filter is dirty or blocked, and can improve user experience.

[0155] The serial numbers of the above-mentioned embodiments of the present application are for description only and do not represent the advantages or disadvantages of the embodiments.

[0156] If the integrated units in the above embodiments are implemented in the form of software functional units and sold or used as independent products, they can be stored in the above computer-readable storage medium. Based on this understanding, the technical solution of the present application, or the part that contributes to the prior art, or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium and includes several instructions for enabling one or more computer devices (which may be personal computers, servers, or network devices, etc.) to execute all or part of the steps of the methods described in the various embodiments of the present application.

[0157] In the above embodiments of the present application, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, please refer to the relevant description of other embodiments.

[0158] In the several embodiments provided in the present application, it should be understood that the disclosed client can be implemented in other ways. Among them, the device embodiments described above are only schematic. For example, the division of the units is only a logical function division. There may be other division methods in actual implementation. For example, multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of units or modules, which can be electrical or other forms.

[0159] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0160] In addition, each functional unit in each embodiment of the present application may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0161] The above is only a preferred implementation of the present application. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present application. These improvements and modifications should also be regarded as the scope of protection of the present application.

Claims

1. An air conditioner filter dust detection device, characterized in that: include: An ultraviolet lamp arranged on the outside of the filter, and an ultraviolet photosensitive film arranged on the inside of the filter; A light emitting diode is arranged between the inner side of the filter and the ultraviolet sensitive film; A photoresistor, arranged within the shielding range of the ultraviolet photosensitive film; A detection module, connected to the photoresistor, and used to detect the electrical signal flowing through the photoresistor; The controller is connected to the ultraviolet lamp, the light-emitting diode and the detection module respectively, and is used to obtain dust accumulation information of the filter according to the electrical signal flowing through the photoresistor.

2. The device according to claim 1, characterized in that The ultraviolet photosensitive film and the photosensitive resistor are arranged at a distance, and the photosensitive resistor is arranged below the ultraviolet photosensitive film; or, The ultraviolet photosensitive film is wrapped around the periphery of the photoresistor.

3. The device according to claim 2, characterized in that The detection module includes an ammeter, which is connected in series with the photoresistor.

4. The device according to any one of claims 1 to 3, characterized in that: Also includes: A warning light connected to the controller is arranged on a housing of the air conditioner.

5. A method for detecting dust accumulation on an air conditioner filter, characterized in that: include: Detecting the electrical signal flowing through the photoresistor; The dust accumulation information of the filter is obtained based on the electrical signal flowing through the photoresistor.

6. The method according to claim 5, characterized in that The electrical signal flowing through the photoresistor is detected as follows: At every time interval, the current signal flowing through the photoresistor is collected once; Each time interval includes at least one time unit, and the duration of the time unit is greater than or equal to the response duration of the photoresistor to the ultraviolet light.

7. The method according to claim 6, characterized in that The method of obtaining dust accumulation information of the filter screen according to the electrical signal flowing through the photoresistor includes: Calculate the average value of the current signal collected at multiple consecutive time intervals; If the average value is greater than or equal to the maximum threshold, it is determined that the filter is seriously dusty and the filter is dirty and clogged; If the average value is less than or equal to the minimum threshold, it is determined that the filter has very little dust accumulation and the filter is not dirty or blocked; If the average value is between the minimum threshold and the maximum threshold, it is determined that the filter has dust accumulation and needs to be cleaned.

8. The method according to claim 7, characterized in that Also includes: If the average value is greater than or equal to the maximum threshold, the warning light is controlled to be red; If the average value is less than or equal to the minimum threshold, the warning light is controlled to be green; If the average value is between the minimum threshold value and the maximum threshold value, the warning light is controlled to be yellow.

9. The method according to claim 7, characterized in that: Also includes: If it is determined that the filter is seriously dusty and clogged, the air conditioner will be controlled to remove dust first and then work normally; If it is determined that the filter has dust and needs to be cleaned, the air conditioner will be automatically cleaned after the operation is completed.

10. The method according to claim 7, characterized in that Also includes: If it is determined that the filter has dust accumulation and needs to be cleaned, the speed of the air conditioner fan is increased to increase the air intake of the air conditioner; the speed is proportional to the size of the average value.

11. The method according to claim 7, characterized in that Before calculating the average value of the current signals collected at multiple consecutive time intervals, the method further includes: Determine whether the current signal flowing through the photoresistor is stable at multiple consecutive time intervals. If so, calculate the average value of the current signal collected at multiple consecutive time intervals. Otherwise, re-collect the current signal flowing through the photoresistor until the current signal is stable.

12. The method according to claim 11, characterized in that If the current signal flowing through the photoresistor in three time intervals is continuously collected, the step of determining whether the current signal flowing through the photoresistor is stable in the multiple time intervals includes: Calculate the absolute value of the difference between the current value collected at the third time interval and the current value collected at the second time interval, and record it as a first absolute value; Calculate the absolute value of the difference between the current value collected at the second time interval and the current value collected at the first time interval, and record it as a second absolute value; If the first absolute value and the second absolute value are equal, or the difference between the first absolute value and the second absolute value is within a preset fluctuation range, it is determined that the current signal flowing through the photoresistor is stable.

13. The method according to any one of claims 6 to 12, characterized in that: The current signal flowing through the photoresistor is collected once at every time interval, including: After the air conditioner is started, the current signal flowing through the photoresistor is collected every one time unit for the first time; thereafter, the current signal flowing through the photoresistor is collected every five time units.

14. An air conditioner indoor unit, characterized in that: include: A processor, and a memory connected to the processor; The memory is used to store computer programs; The processor is used to call and execute the computer program in the memory to perform the method according to any one of claims 5 to 13.

15. An air conditioning unit, characterized in that: include: The air conditioner indoor unit according to claim 14.

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