Air conditioner filter screen filth blockage detection method and system and air conditioner

Abstract

The invention discloses an air conditioner filter screen filth blockage detection method and system and an air conditioner. According to the air conditioner filter screen filth blockage detection method, the working current value of a motor in the air conditioner is obtained, and when the working current value is smaller than a first preset current value, filth blockage prompt information of a filter screen is output; when the working current is greater than or equal to a first preset current value, obtaining at least two current change rates based on the working current value; and outputting a residual life value corresponding to the filter screen according to the change trend of the current change rate. The filter screen can be directly replaced according to the filth blockage prompt information, manual regular inspection is not needed, and the maintenance efficiency and the reliability of the air conditioner can be improved.

Description

Technical Field

[0001] The present application relates to the field of electronic technology, and in particular to a method and system for detecting dirty or clogged air conditioner filters. Background Art

[0002] Air conditioners can experience various problems during use, one of the most common being a failure to cool. This problem not only affects user comfort but can also lead to energy waste and increased repair costs. A failure to cool can be caused by a variety of factors, with a clogged air inlet filter being a common cause. The air inlet filter is primarily used to filter the air entering the air conditioning system, preventing impurities such as dust and hair from entering the system. However, over time, dust and dirt accumulate on the filter, reducing air volume, affecting air circulation and heat exchange efficiency, and ultimately reducing cooling effectiveness.

[0003] Currently, the main method to solve the problem of dirty and clogged filters is to clean or replace the filters regularly. However, this method requires users to check and clean the filters on their own, which increases the maintenance burden.

[0004] Therefore, the current technology still needs to be improved and enhanced. Summary of the Invention

[0005] The present application provides a method, system and air conditioner for detecting air conditioning filter blockage, which can effectively alleviate the problem of increased maintenance burden caused by the need for manual inspection of air conditioning filter blockage.

[0006] This application provides a method for detecting dirty or clogged air conditioner filters, comprising:

[0007] Get the working current value of the motor in the air conditioner;

[0008] When the working current value is less than the first preset current value, a filter blockage prompt message is output;

[0009] When the operating current is greater than or equal to a first preset current value, obtaining at least two current change rates based on the operating current value;

[0010] Output the remaining life value of the filter corresponding to the current change rate according to the changing trend.

[0011] In some embodiments, the method for detecting a dirty or clogged air conditioner filter may further include:

[0012] The filter will count down based on the remaining lifespan, and when the countdown reaches zero, a filter replacement reminder message will be output.

[0013] In some embodiments, the method for detecting a dirty or clogged air conditioner filter includes the steps of counting down based on the remaining life value and outputting a filter replacement prompt when the countdown reaches zero. The steps include:

[0014] Counting down according to the remaining life value, and re-obtaining at least two current change rates based on the operating current value;

[0015] If the trend of the current change rate changes, the remaining life value of the filter is recalculated based on the trend of the current change rate;

[0016] If the recalculated remaining life value is less than the remaining life value in the countdown, the countdown is performed according to the recalculated remaining life value, and when the countdown is reset to zero, a filter replacement reminder message is output.

[0017] In some embodiments, the method for detecting air conditioner filter blockage includes the following steps: outputting the remaining life value corresponding to the filter based on the trend of the current change rate;

[0018] When the current change rate is less than the preset threshold, the first remaining life value of the filter is output.

[0019] In some embodiments, the method for detecting dirty or clogged air conditioner filters further includes the step of outputting a corresponding remaining life value of the filter based on a trend of a current change rate:

[0020] When the current change rate is greater than the preset threshold and the current change rate shows a decreasing trend, the working current value continues to be obtained;

[0021] When the operating current value is less than a second preset current value, a second remaining life value of the filter is output; wherein the second preset current value is greater than the first preset current value;

[0022] When the working current value changes to be greater than the second preset current value and less than the third preset current value, the third remaining life value of the filter is output; wherein the third preset current value is greater than the second preset current value, and the third remaining life value is greater than the second remaining life value.

[0023] In some embodiments, the method for detecting dirty or clogged air conditioner filters further includes the step of outputting a corresponding remaining life value of the filter based on a trend of a current change rate:

[0024] When the current change rate shows an increasing trend, a fourth remaining life value of the filter is output; wherein the fourth remaining life value is different from the first remaining life value.

[0025] The present application also provides an air conditioning filter clogging detection system, which includes:

[0026] The motor drive module is used to connect to the motor and provide driving current for the motor;

[0027] The current detection module is connected to the motor drive module and is used to sample the drive current and output the sampled current;

[0028] The control module is used to obtain the working current value based on the sampled current. When the working current value is less than the first preset current value, the filter is output with a dirty or clogged prompt message; when the working current value is greater than or equal to the first preset current value, at least two current change rates are calculated based on the working current value, and the remaining life value corresponding to the filter is output according to the changing trend of the current change rate.

[0029] In some embodiments of the air conditioning filter clogging detection system, the current detection module includes at least one sampling resistor, one end of the sampling resistor is connected to the control module and the motor drive module; the other end of the sampling resistor is grounded.

[0030] In some embodiments of the air conditioner filter blockage detection system, the control module is further configured to:

[0031] The remaining life value of the filter is output according to the changing trend of the current change rate; a countdown is performed according to the remaining life value, and when the countdown is reset, a filter replacement prompt message is output.

[0032] An embodiment of the present application also provides an air conditioner, which includes a motor and a main control chip. The main control chip is connected to the motor, and the main control chip is used to execute the above-mentioned air conditioner filter dirty blockage detection method.

[0033] The present application provides a method, system, and air conditioner for detecting air conditioner filter clogging. Because the operating current of an air conditioner motor gradually decreases as the amount of dust accumulated on the filter increases, the present method obtains the operating current of the air conditioner motor. When the operating current is less than a first preset current value, a filter clogging prompt is output. This allows the filter to be replaced directly based on the clogging prompt, eliminating the need for manual periodic inspections and improving maintenance efficiency and air conditioner reliability. Furthermore, when the operating current is greater than or equal to the first preset current value, at least two current change rates are obtained based on the operating current value. The corresponding remaining life value of the filter is output based on the trend of the current change rates. In other words, by real-time detection of the motor operating current value, the remaining life value of the filter can be further calculated, facilitating timely monitoring of the filter's dust accumulation status. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] The following detailed description of the specific embodiments of the present application in conjunction with the accompanying drawings will make the technical solutions and other beneficial effects of the present application apparent.

[0035] Figure 1A flow chart of a method for detecting air conditioner filter blockage provided in an embodiment of the present application.

[0036] Figure 2 This is a flow chart of step 500 in the method for detecting dirty or clogged air conditioning filters provided in an embodiment of the present application.

[0037] Figure 3 This is a flow chart of step 400 in the method for detecting dirty or clogged air conditioning filters provided in an embodiment of the present application.

[0038] Figure 4 A schematic structural diagram of the air conditioning filter blocking system provided in an embodiment of the present application.

[0039] Figure 5 This is a circuit diagram of the motor drive module and current detection module in the air conditioning filter blocking system provided in an embodiment of the present application. DETAILED DESCRIPTION

[0040] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the embodiments described 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 those skilled in the art without making creative efforts are within the scope of protection of this application.

[0041] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or suggesting relative importance or implicitly indicating the number of technical features indicated. The features specified as "first" and "second" may explicitly or implicitly include one or more features. In the description of this application, "multiple" means two or more, unless otherwise clearly and specifically defined.

[0042] See also Figure 1 The present invention provides a method for detecting a dirty or clogged air conditioner filter. The method comprises the following steps:

[0043] 100. Obtain the operating current value of the motor in the air conditioner;

[0044] 200. When the working current value is less than the first preset current value, outputting a filter blockage prompt message;

[0045] 300. When the operating current value is greater than or equal to a first preset current value, obtaining at least two current change rates based on the operating current value;

[0046] 400. Output the remaining life value corresponding to the filter according to the changing trend of the current change rate.

[0047] When the air conditioner is operating and the filter is clogged, the air volume entering the air conditioning system decreases, which means that the fan's work per unit time decreases. The load resistance that the motor must overcome decreases, reducing the motor's load and, consequently, the motor's operating current. Conversely, in this application, after the air conditioner enters operation, the motor's operating current can be detected. When the operating current is less than a first preset current value, indicating that the filter is clogged, a corresponding filter clogged warning message is output. This allows the filter to be replaced directly based on this warning, eliminating the need for regular manual inspections and improving maintenance efficiency and air conditioner reliability.

[0048] In this embodiment, after the air conditioner enters operation, if the operating current value is greater than or equal to a first preset current value, an operating current value is obtained at preset intervals. This is equivalent to real-time monitoring of the operating current value. Multiple operating current values are obtained, and at least two current change rates are calculated based on these multiple operating current values. The current environmental conditions of the air conditioner are then determined based on the trend of the current change rate, thereby predicting the remaining life of the corresponding filter and providing a filter replacement reminder.

[0049] In some embodiments, the air conditioner filter blockage detection method further includes: 500, counting down based on the remaining life value, and outputting a filter replacement reminder when the countdown reaches zero. If the remaining life value of the filter is predicted based on the trend of the current change rate, a countdown is performed based on the remaining life value. For example, if the remaining life value of the filter is preset to 60 days, a countdown is performed day by day, and when the countdown reaches zero, a filter replacement reminder is output, thereby detecting filter blockage.

[0050] See also Figure 2 In some other embodiments, step 500 specifically includes:

[0051] 510. Count down according to the remaining life value and recalculate at least two current change rates according to the operating current value;

[0052] 520. If the trend of the current change rate changes, the remaining life value of the filter is recalculated based on the trend of the current change rate;

[0053] 530. If the recalculated remaining life value is less than the remaining life value in the countdown, the countdown is performed according to the recalculated remaining life value, and when the countdown is reset to zero, a filter replacement prompt message is output.

[0054] In this embodiment, during the countdown of the filter's remaining life, an operating current value is simultaneously acquired at preset intervals, the operating current value is continuously monitored, and at least two current change rates are calculated based on the multiple operating current values. This continuous monitoring of the current change rate facilitates predicting the air conditioner's current environment and calculating a new remaining life value. If the calculated new remaining life value is less than the remaining life value currently in the countdown, the remaining life value in the countdown is updated. The countdown is performed using the recalculated remaining life value. If the trend of the current change rate remains unchanged when the countdown is reset to zero, a filter replacement prompt is output. By continuously monitoring the motor's operating current value, the reliability of obtaining the remaining life value can be improved, resulting in a more effective prompt.

[0055] As an embodiment, step 400 includes the following: 410. When the current change rate is less than a preset threshold, the first remaining life value of the filter is output. For example, if the preset time is 15 minutes, an operating current value (e.g., I1, I2, I3, etc.) is obtained every 15 minutes; the corresponding first current change rate A1 = |(I2-I1) / 15|, and the second current change rate A2 = |(I3-I2) / 15|. When A1 and A2 are equal and both A1 and A2 are less than the preset threshold A, the filter dust accumulation of the surface air conditioner is not aggravated. At this point, the first remaining life value is output. Let T be the remaining life value of the filter. The first remaining life value T1 = (I / 0.6I0)*G*24*60 / 15 / 1g(CCM1 / CCM) days. Where I is the currently obtained operating current value. Through experiments, I = D*I0*1g(CCM1 / CCM)+0.3*I0. I0 is the operating current value of the motor when the filter is clean. G is a constant. As the dust accumulation increases, the current gradually decreases. CCM1 is the maximum dust accumulation of the air conditioner filter, and CCM is the real-time dust accumulation.

[0056] See also Figure 3 In some embodiments, step 400 further includes:

[0057] 420. When the current change rate is greater than the preset threshold and the current change rate shows a decreasing trend, continue to obtain the working current value;

[0058] 421. When the operating current value is less than a second preset current value, outputting a second remaining life value of the filter; wherein the second preset current value is greater than the first preset current value;

[0059] 422. When the operating current value changes to be greater than the second preset current value and less than the third preset current value, the third remaining life value of the filter is output; wherein the third preset current value is greater than the second preset current value, and the third remaining life value is greater than the second remaining life value.

[0060] When the current change rate is greater than the preset threshold and the current change rate shows a decreasing trend over time, the working current value of the motor is further obtained, and the remaining life value of the filter is predicted in combination with the working current value of the motor.

[0061] If the motor's operating current is greater than the first preset current value and less than the second preset current value, it indicates that the filter has accumulated dust to a certain extent. In this state, the increase in dust accumulation has little effect on the current. In this case, a second remaining life value can be directly defined, such as T2, which is 30 days, and a countdown based on 30 days can be performed. If the operating current changes to greater than the second preset current value and less than the third preset current value, it indicates that the air duct in the air conditioner is relatively clean, the external pollution level is relatively low, and the filter has been recently cleaned or replaced. In this case, a third remaining life value can be directly defined, such as T3, which is 180 days, and a countdown based on 180 days can be performed.

[0062] In this embodiment, the first preset current value may be 0.6I0, the second preset current value may be 0.8I0, and the third preset current value may be I0.

[0063] In some embodiments, step 400 further includes: when the current change rate shows an increasing trend, outputting a fourth remaining life value of the filter; wherein the fourth remaining life value is different from the first remaining life value. If the current change rate shows an increasing trend, that is, A1 is less than A2, which indicates that the current decay rate is increasing, then the fourth remaining life value is output:

[0064] T4=(I / 0.6I0)*G*24*60 / 15 / [lg(CCM1 / CCM)]*(A2-A1)^(0.5) days, so as to facilitate the subsequent countdown according to the fourth remaining life value.

[0065] It should be noted that a change in the current rate of change trend in step 520 indicates that the current rate of change has changed from being less than a preset threshold to being greater than the preset threshold and showing a decreasing trend, or that the current rate of change has changed from being increasing to being greater than the preset threshold and showing a decreasing trend, or that the current rate of change has changed from being less than the preset threshold to being greater than the preset threshold. Accordingly, in step 520, the remaining life value of the filter is recalculated based on the current rate of change trend, which can be the same as step 400.

[0066] As an embodiment, the maximum dust accumulation of the filter in the air conditioner needs to be calculated based on the size of the filter. For example, the width of the air conditioner filter is W, the height is H, the minimum hole diameter of the filter is S, and the size of the air conditioner filter can be pre-stored in the main control chip of the air conditioner. Then the maximum dust accumulation CCM1 = W*H*3000 / S. Among them, 3000 can be the dust accumulation weight obtained by raising 200g of dust during the test phase, and testing it after 8 hours, simply wiping off the dust on the outer casing and then re-measuring the increased weight of the internal unit. Of course, in other embodiments, it can also be measured by other methods, and this application does not limit this.

[0067] See also Figure 4 The embodiment of the present application also provides an air conditioning filter clogging detection system, which includes a motor drive module 11, a current detection module 12 and a control module 13; the motor drive module 11 is used to connect to the motor 14, and the motor drive module 11 provides a driving current to the motor 14 according to the driving control signal of the control module 13; the current detection module 12 is connected to the motor drive module 11, and the current detection module 12 is used to sample the driving current and then output the sampled current; the control module 13 is used to obtain a working current value based on the sampled current, and when the working current value is less than a first preset current value, it outputs a filter clogging prompt message.

[0068] When the air conditioner is operating, if the filter is clogged, the air volume entering the air conditioning system decreases, which means that the fan's work per unit time decreases. At this time, the load resistance that motor 14 needs to overcome decreases, reducing the load on motor 14 and, accordingly, reducing the operating current of motor 14. Conversely, in the present application, after the air conditioner enters operation, the operating current of motor 14 can be detected. When the operating current is less than a first preset current value, it indicates that the filter is clogged, and a corresponding filter clogged prompt message is output. This allows the filter to be replaced directly based on this clogged prompt message, eliminating the need for manual periodic inspections, thereby improving maintenance efficiency and air conditioner reliability.

[0069] In some embodiments, the control module 13 is also used to obtain a working current value at every preset time interval when the working current value is greater than or equal to a first preset current value, and calculate at least two current change rates based on multiple working current values; output the remaining life value corresponding to the filter according to the changing trend of the current change rate; count down according to the remaining life value, and output a filter replacement reminder when the countdown is reset.

[0070] In this embodiment, after the air conditioner enters operation, if the operating current value is greater than or equal to a first preset current value, an operating current value is obtained at preset intervals. This is equivalent to real-time monitoring of the operating current value. Multiple operating current values are obtained, and at least two current change rates are calculated based on these multiple operating current values. The current environmental conditions of the air conditioner are then determined based on the trend of the current change rate, thereby predicting the remaining life of the corresponding filter and providing a filter replacement reminder.

[0071] See also Figure 5 As an embodiment, the motor drive module 11 includes a driver chip, which is respectively connected to the control module 13 and the motor 14. In this embodiment, three driver chips are provided for the motor 14, namely IPM1, IPM2 and IPM3. The FAN_HU signal terminal and FAN_LU signal terminal connected to the signal input terminal of IPM1 are both connected to the control module 13, the FAN_HV signal terminal and FAN_LV signal terminal connected to the signal input terminal of IPM2 are both connected to the control module 13, and the FAN_HW signal terminal and FAN_LW signal terminal connected to the signal input terminal of IPM3 are both connected to the control module 13. The three driver chips in this embodiment are connected to the motor 14 through the connection port CN1. The driver chip receives the drive signal output by the control module 13 through the signal input terminal, and provides the drive current to the motor 14 through the connection port CN1, thereby controlling the motor 14 to enter the working state.

[0072] As an embodiment, the current detection module 12 includes at least one sampling resistor, one end of which is connected to the control module 13 and the motor drive module 11; the other end of the sampling resistor is grounded. For example, two sampling resistors (respectively, resistor R01 and resistor R02) are provided for the three drive chips, and the control module 13 obtains the sampled current through the F_IU signal terminal and the F_IV signal terminal respectively. It should be noted that in this embodiment, the current values of the three phases in the motor 14 are the same. During actual sampling, the sampled current of one phase can be obtained, that is, the sampled current can be obtained through the F_IU signal terminal or the F_IV signal terminal. Compared with setting the motor drive module 11 inside the motor 14, that is, the motor drive module 11 and the motor 14 are set as one, in this application, the motor drive module 11 is set outside the motor 14, thereby monitoring the drive current of the motor 14 by setting the sampling resistor, realizing real-time monitoring of the drive current of the motor 14, and then detecting the filter blocking of the air conditioner based on the drive current, which can facilitate timely reminder of filter replacement.

[0073] The present application also provides an air conditioner, comprising a motor and a main control chip. The main control chip is connected to the motor and configured to obtain the motor's operating current. The main control chip is configured to execute the aforementioned method for detecting a dirty or clogged electric air conditioner filter. Since the method for detecting a dirty or clogged electric air conditioner filter has been described in detail above, it will not be further described here.

[0074] In the above embodiments, the description of each embodiment has its own focus. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0075] The above is a detailed introduction to the air conditioner filter blockage detection method provided in the embodiments of the present application. Specific examples are used in this article to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the technical solutions and core ideas of the present application; ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein; and these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present application.

Claims

1. A method for detecting dirty or blocked air conditioner filters, characterized in that: include: Get the working current value of the motor in the air conditioner; When the working current value is less than the first preset current value, a filter blockage prompt message is output; When the operating current is greater than or equal to the first preset current value, obtaining at least two current change rates based on the operating current value; The remaining life value corresponding to the filter is output according to the changing trend of the current change rate.

2. The method for detecting dirty or clogged air conditioner filters according to claim 1, characterized in that: The air conditioner filter dirty blockage detection method further includes: A countdown is performed according to the remaining life value, and when the countdown is reset to zero, a filter replacement reminder message is output.

3. The method for detecting dirty or blocked air conditioner filters according to claim 2, characterized in that: The step of counting down according to the remaining life value and outputting the filter replacement prompt information when the countdown is reset includes: Counting down according to the remaining life value, and re-obtaining at least two current change rates based on the operating current value; If the changing trend of the current change rate changes, recalculating the remaining life value of the filter according to the changing trend of the current change rate; If the recalculated remaining life value is less than the remaining life value in the countdown, the countdown is performed according to the recalculated remaining life value, and when the countdown is reset to zero, the filter replacement prompt information is output.

4. The method for detecting dirty or blocked air conditioner filters according to claim 2 or 3, characterized in that: The step of outputting the remaining life value corresponding to the filter according to the changing trend of the current change rate includes: When the current change rates are all less than a preset threshold, the first remaining life value of the filter is output.

5. The method for detecting dirty or blocked air conditioner filters according to claim 4, characterized in that: The step of outputting the remaining life value corresponding to the filter according to the changing trend of the current change rate further includes: When the current change rate is greater than the preset threshold value and the current change rate shows a decreasing trend, continue to obtain the working current value; When the operating current value is less than a second preset current value, a second remaining life value of the filter is output; wherein the second preset current value is greater than the first preset current value; When the working current value changes to be greater than the second preset current value and less than the third preset current value, the third remaining life value of the filter is output; wherein, the third preset current value is greater than the second preset current value, and the third remaining life value is greater than the second remaining life value.

6. The method for detecting dirty or blocked air conditioner filters according to claim 5, characterized in that: The step of outputting the remaining life value corresponding to the filter according to the changing trend of the current change rate further includes: When the current change rate shows an increasing trend, a fourth remaining life value of the filter is output; wherein the fourth remaining life value is different from the first remaining life value.

7. An air conditioner filter blockage detection system, characterized in that: The air conditioning filter dirty blockage detection system includes: A motor drive module, the motor drive module is used to connect to the motor and provide a drive current for the motor; a current detection module, the current detection module being connected to the motor drive module and configured to sample the drive current and output a sampled current; A control module is configured to obtain an operating current value based on the sampled current, and output a filter blockage prompt when the operating current value is less than a first preset current value; and when the operating current value is greater than or equal to the first preset current value, calculate at least two current change rates based on the operating current value, and output a corresponding remaining life value of the filter according to a changing trend of the current change rate.

8. The air conditioner filter blockage detection system according to claim 7, characterized in that: The current detection module includes at least one sampling resistor, one end of which is connected to the control module and the motor drive module; and the other end of which is grounded.

9. The air conditioner filter clogging detection system according to claim 7, characterized in that: The control module is further configured to: A countdown is performed according to the remaining life value, and when the countdown is reset to zero, a filter replacement reminder message is output.

10. An air conditioner, characterized in that: The air conditioner includes a motor and a main control chip, the main control chip is connected to the motor, and the main control chip is used to execute the air conditioner filter dirty blockage detection method according to any one of claims 1 to 6.

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