Filter screen detection method of indoor unit, indoor unit, air conditioner and readable storage medium

Abstract

The application provides a filter screen detection method of an indoor unit, the indoor unit, an air conditioner and a readable storage medium. The filter screen detection method of the indoor unit comprises the following steps: acquiring a first resistance difference value of the filter screen under a set air volume value; determining a first machine external static pressure value in an operation process of the indoor unit; and determining a dirty blockage condition of the filter screen according to the first machine external static pressure value, a set machine external static pressure value and a numerical relationship of the first resistance difference value. The dirty blockage condition of the filter screen is detected through the numerical relationship of the first resistance difference value of the filter screen, the first machine external static pressure value and the set machine external static pressure value, so that the dirty blockage condition of the filter screen can be determined in time in the operation process of the air conditioner.

Description

Technical Field

[0001] This invention belongs to the field of air conditioner control technology, specifically relating to a filter detection method for an indoor unit, a filter detection device for an indoor unit, an indoor unit, an air conditioner, and a readable storage medium. Background Technology

[0002] During air conditioner operation, the indoor unit discharges heated air through a filter. This filter removes dust from the air. After a period of use, a large amount of dust accumulates on the filter, causing it to become clogged. This not only affects the air conditioner's heat exchange performance but also the filter's effectiveness in filtering the air. Currently, existing air conditioners lack a function to accurately detect filter clogging. Therefore, how to detect filter clogging in air conditioners has become a pressing issue that needs to be addressed. Summary of the Invention

[0003] The present invention aims to solve one of the technical problems existing in the prior art or related technologies.

[0004] Therefore, the first aspect of the present invention proposes a method for detecting the filter of an indoor unit.

[0005] A second aspect of the present invention provides a filter detection device for an indoor unit.

[0006] A third aspect of the present invention provides an indoor unit.

[0007] A fourth aspect of the present invention provides an air conditioner.

[0008] A fifth aspect of the present invention provides a readable storage medium.

[0009] In view of this, according to a first aspect of the present invention, a filter detection method for an indoor unit is provided. The indoor unit includes a filter, and the filter detection method includes: obtaining a first resistance difference value of the filter under a set airflow value; determining a first external static pressure value during the operation of the indoor unit; and determining the filter clogging status based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value.

[0010] The filter detection method for indoor units provided by this invention can detect whether the filter of the indoor unit is clogged. Before the indoor unit starts exchanging heat, the air enters the indoor unit through the return air vent. The filter of the indoor unit is located at the return air vent and is used to filter the air passing through it, thus purifying the air.

[0011] The filter has an initial resistance value and a final resistance value. The initial resistance value is the resistance value of the filter after it leaves the factory, that is, the resistance value of the filter in its initial clean state. The final resistance value is the resistance value of the filter when it needs to be cleaned or replaced. The resistance difference can be calculated by subtracting the initial resistance value from the final resistance value. The resistance difference value of the filter will be different when the air conditioner is running at different airflow rates. When the indoor unit is running at a set airflow rate, the first resistance difference value corresponding to the set airflow rate is obtained. The first external static pressure value of the indoor unit under the current operating state is determined. The first external static pressure value is the external static pressure value of the indoor unit under the current hardware conditions when running at the set airflow rate. The set external static pressure value is a pre-stored external static pressure value corresponding to the set airflow rate value. The set external static pressure value is obtained after the air conditioner is installed, that is, the external static pressure value collected when the air conditioner is running with the filter in a brand new state is the set external static pressure value. Based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value, the degree of filter clogging can be determined.

[0012] It is understandable that as the filter becomes dirty and clogged, the external static pressure value collected during the operation of the air conditioner will change. Therefore, the degree of filter clogging can be determined based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value.

[0013] This invention detects the clogging status of the filter by using the first resistance difference of the filter and the static pressure difference of the air conditioner. This enables timely determination of the filter clogging status during air conditioner operation, improving the accuracy and timeliness of filter clogging determination compared to existing technologies.

[0014] It's worth noting that the resistance difference is calculated by subtracting the initial resistance from the final resistance of the filter. This resistance difference represents the change in resistance as the filter transitions from an initially clean state to a clogged state. The first resistance difference is related to the current airflow of the indoor unit, and is determined based on this airflow. The set external static pressure value is the external static pressure measured on an indoor unit with the filter installed in its initial clean state. The first external static pressure value is the external static pressure collected during the operation of the air conditioner's indoor unit; that is, it's the external static pressure value detected after the filter has been used for a period of time. Therefore, based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference, it's possible to determine whether the filter is clogged.

[0015] In addition, the filter detection method for the indoor unit according to the above-described technical solution provided by the present invention may also have the following additional technical features:

[0016] In one possible design, the indoor unit also includes a fan. The step of determining the first external static pressure value during the operation of the indoor unit specifically includes: collecting the operating current value of the fan; and determining the first external static pressure value based on the set air volume value and the operating current value.

[0017] In this design, the indoor unit also includes a fan. During the constant air volume operation of the indoor unit, the fan is powered by current, causing the fan to run at the corresponding speed, thereby enabling the air conditioner to output a constant air volume.

[0018] Specifically, the local storage area of ​​the air conditioner stores the corresponding curves of speed and set current. The fan is controlled to run according to the speed and current in the corresponding curve, thereby realizing the control of constant air volume output of the indoor unit of the air conditioner.

[0019] Before the air conditioner leaves the factory, the indoor unit is tested under multiple external static pressure values. During the test, the fan speed is adjusted to ensure the indoor unit outputs the set airflow. The current value of the indoor unit's fan in the current operating mode and the external static pressure value are recorded according to a correspondence, storing this correspondence in the air conditioner's local storage. When the indoor unit is operated at the set airflow value, the fan's operating current value is obtained. By using the operating current value and the set airflow value, and based on the pre-stored correspondence in the air conditioner's local storage, the corresponding first external static pressure value can be determined.

[0020] Before leaving the factory, the correspondence between air volume and current values ​​under various external static pressure values ​​is stored. During the operation of the air conditioner, the first external static pressure value can be quickly determined by collecting the fan's operating current value, which also improves the accuracy of the obtained first external static pressure value.

[0021] In one possible design, the step of determining the first external static pressure value based on the air volume value and the operating current value specifically includes: finding the first correspondence between the current value and the external static pressure value based on the set air volume value; determining the second external static pressure value based on the operating current value and the first correspondence; obtaining the static pressure correction value; and calculating the first external static pressure value based on the second external static pressure value and the static pressure correction value.

[0022] In this design, the indoor unit can operate at different airflow rates. To determine the first external static pressure value, a lookup table is used to find the first correspondence between the external static pressure value and the current value based on the set airflow rate. Then, the corresponding second external static pressure value is found based on the fan's operating current value and the first correspondence. Not only is the filter resistance included in the second external static pressure value, but other structural components in the indoor unit also exert resistance to the airflow, which is also factored into the second external static pressure value. Therefore, after obtaining the second external static pressure value, it is corrected using a static pressure correction value to obtain the first external static pressure value corresponding to the set airflow rate.

[0023] In determining the first external static pressure value corresponding to the set air volume value, the present invention corrects the second external static pressure value obtained by searching through a static pressure correction value, so that the obtained first static pressure value is only affected by the resistance value of the filter screen, thereby ensuring that the first external static pressure value and the set external static pressure value can reflect the actual dirt and clogging of the filter screen.

[0024] In one possible design, the indoor unit includes an air guide vane, which is positioned at the air outlet of the indoor unit. The step of obtaining the static pressure correction value specifically includes: collecting the tilt angle of the air guide vane; obtaining a second correspondence between the tilt angle and the correction value; and finding the static pressure correction value based on the tilt angle and the second correspondence.

[0025] In this design, the indoor unit also includes an air guide vane, which is located at the air outlet of the indoor unit, outside the filter. During operation, the exhaust air, after being filtered by the filter, passes through the air guide vane, changing the direction of the airflow from the indoor unit. The indoor unit also includes a drive motor for driving the air guide vane. The drive motor is connected to the air conditioner's controller, allowing the user to control the motor's movement via the controller, thus rotating the air guide vane to a specified angle and adjusting the airflow direction of the air conditioner.

[0026] The air guide vane also creates resistance to the airflow from the indoor unit, thus affecting the judgment of the outdoor static pressure value of the indoor unit. Different angles of the air guide vane result in different resistances to the airflow from the indoor unit. Before the indoor unit leaves the factory, the resistance value generated by the air guide vane and the tilt angle of the air guide vane are stored according to a corresponding relationship. The resistance generated by the air guide vane to the airflow from the indoor unit is the static pressure correction value. Based on the tilt angle of the air guide vane, the corresponding resistance generated by the sealing strip to the airflow from the indoor unit, i.e., the static pressure correction value, can be found through a second correspondence. To eliminate the influence of the air guide vane on the outdoor static pressure value, this invention uses the resistance value generated by the air guide vane to the airflow from the indoor unit as the static pressure correction value. By calculating the second outdoor static pressure value and the static pressure correction value, the resulting first static pressure value is only affected by the resistance value of the filter, allowing the first outdoor static pressure value and the set outdoor static pressure value to accurately reflect the actual dirt and clogging of the filter.

[0027] In one possible design, before the step of collecting the operating current value of the fan, the following steps are included: collecting the current air volume value output by the fan; determining the air volume threshold range based on the set air volume value; and determining the time for which the current air volume value remains within the air volume threshold range.

[0028] In this design, before collecting the operating current value, it is necessary to ensure that the fan's output airflow reaches the set value and remains stable. An airflow threshold range is obtained by adding or subtracting the set airflow value. If the fan's output airflow falls within this threshold range, it can be determined that the fan is operating at the set airflow value. The duration for which the current airflow value remains within the threshold range is timed; if the duration reaches the set time, the fan is determined to be in a stable airflow output state. This invention determines whether the fan has reached a constant output set airflow value before collecting the operating current value, thus enabling the collection of the corresponding operating current value. By timing the duration for which the current airflow value remains within the threshold range until the set time is reached, the collecting of the operating current value further ensures that the collected operating current value represents the current value when the fan is operating at a constant airflow, improving the accuracy of the subsequent external static pressure value obtained from the operating current value.

[0029] In one possible design, the step of obtaining the first resistance difference of the filter under a set airflow value specifically includes: obtaining a third correspondence between the airflow value and the filter resistance difference; and finding the first resistance difference based on the set airflow value and the third correspondence.

[0030] In this design, the resistance generated by the filter to the airflow from the indoor unit is a hardware characteristic of the filter itself; that is, the initial resistance value of the filter is fixed. Before the filter leaves the factory, its durability is tested to determine the filter's final resistance value. When the filter reaches its final resistance value, it is recommended that the user replace the filter.

[0031] Because the airflow output of the indoor unit varies, the filter resistance value also affects the airflow output of the indoor unit differently. Before the air conditioner leaves the factory, the indoor unit is simulated to operate at various airflow values, and the final resistance value of the filter is collected under each airflow value. This allows for the calculation of the first resistance difference of the filter corresponding to each airflow value. The first resistance difference is then stored in relation to each airflow value according to a third correspondence relationship. After the air conditioner is installed, the set airflow value for constant output during indoor unit operation is determined, and the first resistance difference corresponding to the set airflow value is looked up according to the third correspondence relationship.

[0032] In one possible design, the step of determining the first resistance difference based on the set airflow value specifically includes: obtaining the second resistance difference of the filter; obtaining the rated airflow value of the indoor unit; and calculating the first resistance difference based on the rated airflow value, the set airflow value, and the second resistance difference.

[0033] In this design, the resistance generated by the filter to the airflow from the indoor unit is a hardware characteristic of the filter itself; that is, the initial resistance value of the filter is fixed. Before the filter leaves the factory, its durability is tested to determine the filter's final resistance value. When the filter reaches its final resistance value, it is recommended that the user replace the filter. The difference between the initial resistance value and the final resistance value is calculated to obtain the second resistance difference value.

[0034] Because the airflow output by the indoor units varies, the filter resistance value also has different effects on the airflow from the indoor unit. Before leaving the factory, the indoor unit has a pre-stored formula in its local storage area for calculating the first resistance difference based on the second resistance difference. The specific formula is as follows:

[0035] D1=A×D2×(A Fn / A F0 )^2;

[0036] Where D1 is the first resistance difference, D2 is the second resistance difference, and A is a coefficient. F0 A is the rated air volume value. Fn To set the airflow value.

[0037] This invention substitutes the obtained set airflow value, the rated airflow value stored in the local storage area, and the second resistance difference value into the above formula to calculate the first resistance difference value, where the coefficient A ranges from 0.8 to 1.2. The first resistance difference value calculated by the above formula is the resistance difference value of the filter corresponding to the set airflow value. This improves the accuracy of subsequent calculations based on the first resistance difference value, thereby improving the accuracy of judging the filter clogging condition and reducing the possibility of misjudgment.

[0038] In one possible design, the step of obtaining the second resistance difference specifically includes: obtaining a first set resistance value and a second set resistance value of the filter; and calculating the second resistance difference based on the first set resistance value and the second set resistance value.

[0039] In this design, the first resistance value of the filter is its initial resistance value, and the resistance generated by the filter to the airflow through the filter is a hardware characteristic of the filter itself. The second resistance value is the final resistance value of the filter, which is obtained by testing the filter's durability. The difference between the initial resistance value and the final resistance value is calculated to obtain the second resistance difference value. This second resistance difference value is a hardware property of the filter itself.

[0040] Understandably, since the second resistance difference is a hardware attribute value of the filter, it is directly marked on the filter or recorded on its packaging. After the user replaces the filter, the second resistance difference is input into the indoor unit of the air conditioner via the controller. The indoor unit can then calculate the first resistance difference based on a formula pre-stored in its local memory.

[0041] In one possible design, the step of determining the filter clogging status based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value specifically includes: obtaining the static pressure difference value based on the first external static pressure value and the set external static pressure value; and determining the filter clogging status based on the numerical relationship between the first resistance difference value and the static pressure difference value.

[0042] In this design, the difference between the first external static pressure value and the set external static pressure value is calculated to obtain the static pressure difference. Since both the first and set external static pressure values ​​correspond to the indoor unit's set airflow, the first external static pressure value is the static pressure collected when the indoor unit is running at the set airflow value with the filter in its current state, while the set external static pressure value is the static pressure collected when the indoor unit is running at the set airflow value before the filter leaves the factory, i.e., in its initial state. Therefore, the static pressure difference calculated from the first and set external static pressure values ​​also corresponds to the set airflow value. The calculated static pressure difference accurately reflects the actual degree of filter clogging; therefore, based on the first resistance difference and the static pressure difference of the filter in its initial state, the degree of filter clogging can be accurately determined.

[0043] It is understandable that the static pressure difference outside the unit will vary depending on the airflow of the indoor unit. By establishing a correspondence between the first resistance difference and the operating airflow setting of the indoor unit, the filter clogging can be assessed based on the first external static pressure value corresponding to the set airflow value and the numerical relationship between the set external static pressure value and the first resistance difference. This can improve the accuracy of determining whether the filter is clogged.

[0044] In one possible design, the step of determining the filter's clogging status based on the numerical relationship between the first resistance difference and the static pressure difference specifically includes: calculating the ratio of the static pressure difference to the first resistance difference; if the ratio is greater than a set value, it is determined that the filter is in a clogging state.

[0045] In this design, the first resistance difference is calculated by subtracting the initial resistance value from the final resistance value of the filter. This first resistance difference represents the change in resistance of the filter from an initially clean state to a clogged state. The external static pressure value is set to the external static pressure value detected by the indoor unit with the filter installed in its initially clean state. The first external static pressure value is the external static pressure value collected during the operation of the indoor unit, i.e., the external static pressure value detected after the filter has been used for a period of time. The static pressure difference and the first resistance difference are compared to obtain a specific ratio, which reflects the degree of filter clogging. A preset value is established by comparing the ratio; when the ratio reaches the preset value, the filter is considered to be clogged, thus achieving the detection of whether the filter is clogged.

[0046] In one possible design, the filter detection method for the indoor unit may also include: outputting a first prompt message based on the filter being clogged, and / or sending a second prompt message to the server.

[0047] In this design, the air conditioner also includes a remote control with a first display unit on the remote control and a second display unit and a speaker on the indoor unit.

[0048] When the indoor unit detects that the filter is clogged, it displays a first prompt message via the first and / or second display units on the remote control. This first prompt message includes text and icons, thus informing the user that the filter is clogged. Alternatively, the first prompt message can be output as audio via the speaker in the indoor unit.

[0049] The indoor unit also includes a communication device. When the indoor unit detects that the filter is clogged, it sends a second prompt message to the server via the communication device. The server is the manufacturer's after-sales platform, and the manufacturer can provide corresponding value-added services based on the second prompt message. Users do not need to replace the filter themselves, which further improves the user experience.

[0050] According to a second aspect of the present invention, a filter detection device for an indoor unit is provided. The indoor unit includes a filter, which is disposed at the return air vent of the indoor unit. The filter detection device includes: an acquisition module for acquiring a first resistance difference value of the filter under a set airflow value; a first determination module for determining a first external static pressure value during the operation of the indoor unit; and a second determination module for determining the filter clogging status based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value.

[0051] The filter detection device for indoor units provided by this invention can detect whether the filter of the indoor unit is clogged. Before the indoor unit starts exchanging heat, the air enters the indoor unit through the return air vent. The filter of the indoor unit is located at the return air vent and is used to filter the air passing through it, thus purifying the air.

[0052] The filter detection device includes: an acquisition module, a determination module, a calculation module, and a judgment module.

[0053] The filter has an initial resistance value and a final resistance value. The initial resistance value is the resistance value of the filter after it leaves the factory, that is, the resistance value of the filter in its initial clean state. The final resistance value is the resistance value of the filter when it needs to be cleaned or replaced. The resistance difference can be calculated by subtracting the initial resistance value from the final resistance value. The resistance difference value of the filter will be different when the air conditioner is running at different airflow rates. When the indoor unit is running at a set airflow rate, the first resistance difference value corresponding to the set airflow rate can be obtained. When the indoor unit is running, the first external static pressure value of the indoor unit can be determined. The first external static pressure value is the external static pressure value of the indoor unit under the current hardware conditions and running at the set airflow rate. The set external static pressure value is the pre-stored external static pressure value corresponding to the set airflow rate value. The set external static pressure value is obtained after the air conditioner is installed, that is, the external static pressure value collected when the air conditioner is running with the filter in a brand new state is the set external static pressure value. Based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value, the degree of filter clogging can be determined.

[0054] It is understandable that as the filter becomes dirty and clogged, the external static pressure value collected during the operation of the air conditioner will change. Therefore, the degree of filter clogging can be determined based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value.

[0055] This invention detects the clogging status of the filter by using the first resistance difference of the filter and the static pressure difference of the air conditioner. This enables timely determination of the filter clogging status during air conditioner operation, improving the accuracy and timeliness of filter clogging determination compared to existing technologies.

[0056] It's worth noting that the resistance difference is calculated by subtracting the initial resistance from the final resistance of the filter. This resistance difference represents the change in resistance as the filter transitions from an initially clean state to a clogged state. The first resistance difference is related to the current airflow of the indoor unit, and is determined based on this airflow. The set external static pressure value is the external static pressure measured on an indoor unit with the filter installed in its initial clean state. The first external static pressure value is the external static pressure collected during the operation of the air conditioner's indoor unit; that is, it's the external static pressure value detected after the filter has been used for a period of time. Therefore, based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference, it's possible to determine whether the filter is clogged.

[0057] It is understandable that the static pressure difference outside the unit will vary depending on the airflow rate of the indoor unit. By establishing a correspondence between the first resistance difference and the operating airflow setting of the indoor unit, and comparing the calculated first static pressure difference outside the unit with the first resistance difference corresponding to the set airflow rate at different airflow rates, the accuracy of determining whether the filter is clogged can be improved.

[0058] According to a third aspect of the present invention, an indoor unit is provided, comprising: a housing and a filter disposed within an air duct.

[0059] The casing has an air duct, and the filter is installed inside the air duct.

[0060] A memory stores programs or instructions; a processor executes the programs or instructions stored in the memory to implement the steps of the filter detection method for the indoor unit as described in the first aspect above. Therefore, the filter detection method for the indoor unit possesses all the beneficial effects of any possible design of the first aspect above, which will not be elaborated further here.

[0061] The indoor unit provided by this invention includes a casing and a filter, with an air duct formed inside the casing. The indoor unit also includes a return air vent, through which air before heat exchange enters the air duct during operation. The filter is disposed inside the air duct and filters the air flowing through it, thereby purifying the air.

[0062] In addition, the indoor unit of the above-described technical solution provided by the present invention may also have the following additional technical features:

[0063] In one possible design, the indoor unit also includes: an air guide strip, which is located at the air outlet of the air duct; and a drive motor, the output end of which is connected to the air guide strip to drive the air guide strip to adjust its tilt angle.

[0064] In this design, the indoor unit also includes an air guide vane and a drive motor. The air guide vane is located at the air outlet of the air duct, outside the filter. During operation, the air discharged from the indoor unit, after being filtered by the filter, passes through the air guide vane, changing the direction of the airflow. The drive motor is connected to the air conditioner's controller, allowing the user to control the motor's movement, thus rotating the air guide vane to a specified angle and adjusting the airflow direction.

[0065] In one possible design, the indoor unit further includes: a display device connected to the processor for outputting a first prompt message; and / or a communication device connected to the processor for sending a second prompt message to the server.

[0066] In this design, the indoor unit also includes a display device and / or a communication device. The display device and / or communication device are connected to the indoor unit's processor. When the filter of the indoor unit is detected to be clogged, the display device can display a first warning message, informing the user that the filter is currently clogged and needs to be replaced or cleaned. The communication device can send a second warning message to a server. The manufacturer can read the second warning message from the server and provide corresponding value-added services based on it, eliminating the need for the user to replace the filter themselves and improving the user experience.

[0067] In some embodiments, the air conditioner further includes a remote control, which has a first display unit and the indoor unit has a second display unit and a speaker.

[0068] When the indoor unit detects that the filter is clogged, it displays a first prompt message via the first and / or second display units on the remote control. This first prompt message includes text and icons, thus informing the user that the filter is clogged. Alternatively, the first prompt message can be output as audio via the speaker in the indoor unit.

[0069] In some embodiments, the indoor unit outputs a first prompt message in audio form through a speaker each time it is turned on, thereby preventing the user from ignoring the first prompt message.

[0070] In some embodiments, the filter clogging level includes "Good," "Moderately Clogged," and "Severely Clogged." Different clogging levels correspond to different initial warning messages, allowing users to more clearly understand the current clogging level of the indoor unit's filter.

[0071] According to a fourth aspect of the present invention, an air conditioner is provided, comprising: an indoor unit and an outdoor unit.

[0072] The outdoor unit is connected to the indoor unit. The outdoor unit also contains a compressor, which compresses the refrigerant. The compressed refrigerant then flows through the refrigerant pipes to the indoor unit, thereby achieving the cooling and heating functions of the air conditioner.

[0073] The indoor unit is selected as any of the possible designs in the third aspect, and thus has all the beneficial effects of the indoor unit in any of the possible designs in the third aspect, which will not be elaborated further here.

[0074] According to a fifth aspect of the present invention, a readable storage medium is provided, on which a program or instructions are stored, which, when executed by a processor, implement the steps of the filter detection method for an indoor unit as described in any of the above possible designs. Therefore, it possesses all the beneficial technical effects of the filter detection method for an indoor unit as described in any of the above possible designs, which will not be elaborated further here.

[0075] Additional aspects and advantages of the invention will become apparent in the following description or may be learned by practice of the invention. Attached Figure Description

[0076] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0077] Figure 1 One of the schematic flowcharts of the filter detection method of the indoor unit according to the first embodiment of the present invention is shown;

[0078] Figure 2 A second schematic flowchart of the filter detection method for the indoor unit according to the first embodiment of the present invention is shown;

[0079] Figure 3 A third schematic flowchart of the filter detection method for the indoor unit according to the first embodiment of the present invention is shown;

[0080] Figure 4 The fourth schematic flowchart of the filter detection method of the indoor unit in the first embodiment of the present invention is shown;

[0081] Figure 5 Fifth schematic flowchart of the filter detection method of the indoor unit according to the first embodiment of the present invention is shown;

[0082] Figure 6 A schematic flowchart of the filter detection method for an indoor unit according to the first embodiment of the present invention is shown in diagram six.

[0083] Figure 7 A schematic flowchart of the filter detection method for an indoor unit according to the first embodiment of the present invention is shown as Flowchart 7.

[0084] Figure 8 The eighth schematic flowchart of the filter detection method of the indoor unit according to the first embodiment of the present invention is shown;

[0085] Figure 9 A schematic flowchart of the filter detection method for an indoor unit according to the first embodiment of the present invention is shown as Flowchart 9;

[0086] Figure 10 A schematic flowchart of the filter detection method for an indoor unit according to the first embodiment of the present invention is shown as 10.

[0087] Figure 11 A schematic block diagram of the filter detection device for an indoor unit according to a second embodiment of the present invention is shown;

[0088] Figure 12 A schematic block diagram of the indoor unit according to a third embodiment of the present invention is shown;

[0089] Figure 13 A schematic block diagram of an air conditioner according to a fourth embodiment of the present invention is shown. Detailed Implementation

[0090] To better understand the above-mentioned objectives, features, and advantages of the present invention, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments of the present invention and the features thereof can be combined with each other.

[0091] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and therefore the scope of protection of the invention is not limited to the specific embodiments disclosed below.

[0092] The following reference Figures 1 to 13 This invention describes a method for detecting the filter of an indoor unit, a device for detecting the filter of an indoor unit, an indoor unit, an air conditioner, and a readable storage medium according to some embodiments of the present invention.

[0093] Example 1:

[0094] like Figure 1 As shown, the first embodiment of the present invention provides a filter detection method for an indoor unit, specifically including:

[0095] Step 102: Obtain the first resistance difference of the filter under the set airflow value;

[0096] Step 104: Determine the first external static pressure value during the operation of the indoor unit;

[0097] Step 106: Determine the filter screen's clogging status based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value.

[0098] The filter detection method for the indoor unit provided in this embodiment can detect whether the filter of the indoor unit is clogged. Before the indoor unit starts heat exchange, the air enters the indoor unit through the return air vent. The filter of the indoor unit is located at the return air vent and is used to filter the air passing through the vent, thus purifying the air. The filter has an initial resistance value and a final resistance value. The initial resistance value is the resistance value of the filter after it leaves the factory, that is, the resistance value of the filter in its initial clean state. The final resistance value is the resistance value of the filter when it needs to be cleaned or replaced. The resistance difference can be calculated by subtracting the initial resistance value from the final resistance value. The resistance difference value of the filter will be different when the air conditioner is running at different airflow rates. When the indoor unit is controlled to run at a set airflow rate, the first resistance difference value corresponding to the set airflow rate is obtained. The first external static pressure value of the indoor unit under the current operating state is determined. The first external static pressure value is the external static pressure value of the indoor unit under the current hardware conditions during operation at the set airflow rate. The set external static pressure value is a pre-stored external static pressure value corresponding to the set airflow value. This set external static pressure value is collected after the air conditioner is installed, meaning the external static pressure value collected when the air conditioner is running with the filter in a brand-new state is the set external static pressure value. Based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value, the degree of filter clogging can be determined.

[0099] It is understandable that as the filter becomes dirty and clogged, the external static pressure value collected during the operation of the air conditioner will change. Therefore, the degree of filter clogging can be determined based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value.

[0100] It's worth noting that the resistance difference is calculated by subtracting the initial resistance from the final resistance of the filter. This resistance difference represents the change in resistance as the filter transitions from an initially clean state to a clogged state. The first resistance difference is related to the current airflow of the indoor unit; it is determined based on the indoor unit's airflow. The external static pressure is set to the value obtained by testing the outdoor static pressure of the indoor unit with the filter installed in its initially clean state.

[0101] The first external static pressure value is the external static pressure value collected during the operation of the indoor unit of the air conditioner. That is, the first external static pressure value is the external static pressure value detected after the filter has been used for a period of time. Therefore, by determining whether the filter is clogged and the degree of clogging based on the first external static pressure value and the numerical relationship between the set external static pressure value and the first resistance value, it is possible to determine whether the filter is clogged and the degree of clogging.

[0102] In the above embodiments, a fan is also provided in the indoor unit.

[0103] In this embodiment, the indoor unit also includes a fan. During the constant air volume operation, the fan is energized and runs at a corresponding speed, thereby enabling the air conditioner to output a constant air volume.

[0104] Specifically, the local storage area of ​​the air conditioner stores the corresponding curves of speed and set current. The fan is controlled to run according to the speed and current in the corresponding curve, thereby realizing the control of constant air volume output of the indoor unit of the air conditioner.

[0105] like Figure 2 As shown, in any of the above embodiments, the step of determining the first external static pressure value of the indoor unit in the filter detection method specifically includes:

[0106] Step 202: Collect the operating current value of the fan in the indoor unit;

[0107] Step 204: Obtain the first external static pressure value based on the operating current value and the set air volume value of the indoor unit.

[0108] In this embodiment, before the air conditioner leaves the factory, the indoor unit of the air conditioner is tested under multiple external static pressure values. During the test, the speed of the fan is adjusted so that the air volume output by the indoor unit reaches the set air volume value. The current value and external static pressure value of the indoor unit's fan in the current operating mode are recorded according to the corresponding relationship, so that the correspondence between air volume, current value and external static pressure value is stored in the local storage area of ​​the air conditioner.

[0109] When the indoor unit of the air conditioner is running at a set airflow value, the operating current value of the fan is acquired. Using the operating current value and the set airflow value, the corresponding first external static pressure value can be determined based on the pre-stored correspondence in the air conditioner's local storage area. The correspondence between airflow and current values ​​for each external static pressure value is stored at the factory. During air conditioner operation, the first external static pressure value can be quickly determined by acquiring the fan's operating current value, thus improving the accuracy of the obtained first external static pressure value.

[0110] In some embodiments, the correspondence between air volume, fan current, and external static pressure is stored in a table format in the local storage area of ​​the air conditioner.

[0111] In these embodiments, during the operation of the air conditioner, the corresponding external static pressure value is found by looking up a table based on the operating current value and the set air volume value.

[0112] In other embodiments, the correspondence between the air volume value, the fan current value, and the external static pressure value is stored in the local storage area of ​​the air conditioner in the form of a function.

[0113] In these embodiments, during the operation of the air conditioner, the operating current value and the set airflow value are acquired. The operating current value and the set airflow value are calculated using a set function to obtain the external static pressure value.

[0114] like Figure 3 As shown, the step in the filter detection method to obtain the first external static pressure value based on the operating current value and the set airflow value of the indoor unit specifically includes:

[0115] Step 302: By setting the air volume value, the first correspondence between the current value and the external static pressure value is found;

[0116] Step 304: Based on the operating current value, find the second external static pressure value through the first correspondence relationship;

[0117] Step 306: Obtain the static pressure correction value;

[0118] Step 308: Calculate the difference between the second external static pressure value and the static pressure correction value to obtain the first external static pressure value.

[0119] In this embodiment, the indoor unit can operate at different airflow values. In determining the first external static pressure value, a lookup table is used to find the first correspondence between the external static pressure value and the current value based on the set airflow value. Then, the corresponding second external static pressure value is found based on the fan's operating current value and the first correspondence. Not only is the filter resistance included in the second external static pressure value, but other structural components in the indoor unit also exert resistance to the airflow, which is also included in the second external static pressure value. Therefore, after obtaining the second external static pressure value, it is corrected and calculated based on the static pressure correction value to obtain the first external static pressure value corresponding to the set airflow value.

[0120] In determining the first external static pressure value corresponding to the set air volume value, the present invention corrects the second external static pressure value obtained by searching through a static pressure correction value, so that the obtained first static pressure value is only affected by the resistance value of the filter screen, thereby ensuring that the first external static pressure value and the set external static pressure value can reflect the actual dirt and clogging of the filter screen.

[0121] In some embodiments, the external static pressure value, air volume value, and current value are stored in the local storage area of ​​the indoor unit in the form of a table, as shown in Table 1.

[0122] Table 1

[0123]

[0124] In one specific embodiment, the set airflow value of the air conditioner is detected to be airflow 1, and the operating current value of the fan is determined to be I. L2The static pressure value of the second machine can be obtained by looking up the table.

[0125] In another specific embodiment, the set airflow value of the air conditioner is detected to be airflow 1 and the operating current value of the fan is determined to be within I. L2 to I L3 If the static pressure value is between P2 and P3, then the second static pressure value corresponding to the set wind pressure can be obtained by interpolating P2 and P3.

[0126] In any of the above embodiments, the indoor unit further includes an air guide vane and a drive motor, with the air guide vane connected to the output end of the drive motor.

[0127] The indoor unit also includes an air guide vane, which is located at the air outlet of the indoor unit, outside the filter. During operation, the air discharged from the indoor unit, after being filtered by the filter, passes through the air guide vane, thus changing the direction of the airflow. The indoor unit also includes a drive motor for driving the air guide vane. The drive motor is connected to the air conditioner's controller, allowing the user to control the motor's movement via the controller, thereby rotating the air guide vane to a specified angle and adjusting the airflow direction of the air conditioner.

[0128] like Figure 4 As shown, in any of the above embodiments, the step of obtaining the static pressure correction value in the filter detection method specifically includes:

[0129] Step 402: Obtain the tilt angle of the air guide vane;

[0130] Step 404: Determine the second correspondence between the tilt angle and the correction value;

[0131] Step 406: Using the second correspondence, find the corresponding static pressure correction value based on the tilt angle.

[0132] In this embodiment, the air guide strip also creates resistance to the airflow from the indoor unit, thus affecting the determination of the outdoor static pressure value of the indoor unit. Different angles of the air guide strip result in different resistances to the airflow from the indoor unit. Before the indoor unit leaves the factory, the resistance value generated by the air guide strip and the tilt angle of the air guide strip are stored according to a corresponding relationship. The resistance generated by the air guide strip to the airflow from the indoor unit is the static pressure correction value. Based on the tilt angle of the air guide strip of the indoor unit, the resistance generated by the corresponding sealing strip to the airflow from the indoor unit, i.e., the static pressure correction value, can be found through a second correspondence. To eliminate the influence of the air guide strip on the outdoor static pressure value, this invention uses the resistance value generated by the air guide strip to the airflow from the indoor unit as the static pressure correction value. By calculating the second outdoor static pressure value and the static pressure correction value, the obtained first static pressure value is only affected by the resistance value of the filter, allowing the first outdoor static pressure value and the set outdoor static pressure value to accurately reflect the actual dirt and clogging of the filter.

[0133] In some embodiments, the tilt angle of the air guide vane is determined by collecting the rotation angle of the drive motor.

[0134] In other embodiments, a sensor is installed on the air guide vane or on the output shaft of the drive motor. The sensor is connected to the processor of the indoor unit and can directly collect the tilt angle of the air guide vane.

[0135] like Figure 5 As shown, in any of the above embodiments, before the step of collecting the operating current value of the fan in the indoor unit in the filter detection method, the method further includes:

[0136] Step 502: During the operation of the fan, collect the current air volume value;

[0137] Step 504: Find the corresponding airflow threshold range based on the set airflow value;

[0138] Step 506: Determine the duration for which the current airflow value remains within the airflow threshold range.

[0139] In this embodiment, before collecting the operating current value, it is necessary to determine that the airflow output by the fan has reached a set value and remains stable. An airflow threshold range is obtained by adding or subtracting the set airflow value. If the airflow output by the fan falls within this threshold range, it can be determined that the fan is operating at the set airflow value. The duration for which the current airflow value remains within the threshold range is timed; if the duration reaches a set time, it is determined that the fan is in a stable airflow output state. This invention, by determining whether the fan has reached a constant set airflow output value before collecting the operating current value, achieves the collection of the operating current value corresponding to the set airflow value. By timing the duration for which the current airflow value remains within the threshold range until the set time is reached, and then collecting the operating current value, it is further ensured that the collected operating current value is the current value when the fan is operating in a constant airflow state, improving the accuracy of the subsequent external static pressure value obtained from the operating current value.

[0140] like Figure 6 As shown, in any of the above embodiments, the step of determining the corresponding first resistance difference value based on the set airflow value in the filter detection method specifically includes:

[0141] Step 602: Determine the third correspondence between the air volume value and the filter resistance difference;

[0142] Step 604: Based on the third correspondence, find the corresponding first resistance difference by setting two separate values.

[0143] In this embodiment, the resistance generated by the filter to the airflow from the indoor unit is a hardware characteristic of the filter itself, meaning the initial resistance value of the filter is fixed. Before the filter leaves the factory, its durability is tested to determine the filter's final resistance value. When the filter reaches its final resistance value, it is recommended that the user replace the filter.

[0144] Because the airflow output of the indoor unit varies, the filter resistance value also affects the airflow output of the indoor unit differently. Before the air conditioner leaves the factory, the indoor unit is simulated to operate at various airflow values, and the final resistance value of the filter is collected under each airflow value. This allows for the calculation of the first resistance difference of the filter corresponding to each airflow value. The first resistance difference is then stored in relation to each airflow value according to a third correspondence relationship. After the air conditioner is installed, the set airflow value for constant output during indoor unit operation is determined, and the first resistance difference corresponding to the set airflow value is looked up according to the third correspondence relationship.

[0145] like Figure 7 As shown, in any of the above embodiments, the step of obtaining the first resistance difference value corresponding to the filter and the set airflow value in the filter detection method specifically includes:

[0146] Step 702: Obtain the second resistance difference value of the filter and the rated air volume value of the indoor unit;

[0147] Step 704: Calculate the first resistance difference based on the rated air volume value, the set air volume value, and the second resistance difference value.

[0148] In this embodiment, the resistance generated by the filter to the airflow from the indoor unit is a hardware characteristic of the filter itself, meaning the initial resistance value of the filter is fixed. Before the filter leaves the factory, its durability is tested to determine its final resistance value. When the filter reaches its final resistance value, it is recommended that the user replace the filter. The difference between the initial resistance value and the final resistance value is calculated to obtain a second resistance difference value.

[0149] Because the airflow output by the indoor units varies, the filter resistance value also has different effects on the airflow from the indoor unit. Before leaving the factory, the indoor unit has a pre-stored formula in its local storage area for calculating the first resistance difference based on the second resistance difference. The specific formula is as follows:

[0150] D1=A×D2×(A Fn / A F0 )^2;

[0151] Where D1 is the first resistance difference, D2 is the second resistance difference, and A is a coefficient. F0 A is the rated air volume value. Fn To set the airflow value.

[0152] This invention substitutes the obtained set airflow value, the rated airflow value stored in the local storage area, and the second resistance difference value into the above formula to calculate the first resistance difference value, where the coefficient A ranges from 0.8 to 1.2. The first resistance difference value calculated by the above formula is the resistance difference value of the filter corresponding to the set airflow value. This improves the accuracy of subsequent calculations based on the first resistance difference value, thereby improving the accuracy of judging the filter clogging condition and reducing the possibility of misjudgment.

[0153] like Figure 8 As shown, in any of the above embodiments, the step of obtaining the second resistance difference value of the filter screen in the filter screen detection method specifically includes:

[0154] Step 802: Obtain the first set resistance value and the second set resistance value of the filter screen;

[0155] Step 804: Calculate the difference between the first set resistance value and the second set resistance value to obtain the second resistance difference value.

[0156] In this embodiment, the first resistance value of the filter is its initial resistance value, and the resistance generated by the filter against the airflow is a hardware characteristic of the filter itself. The second set resistance value is the final resistance value of the filter, which is obtained by testing the filter's durability. The difference between the initial resistance value and the final resistance value is calculated to obtain the second resistance difference value. This second resistance difference value is a hardware attribute of the filter itself.

[0157] Understandably, since the second resistance difference is a hardware attribute value of the filter, it is directly marked on the filter or recorded on its packaging. After the user replaces the filter, the second resistance difference is input into the indoor unit of the air conditioner via the controller. The indoor unit can then calculate the first resistance difference based on a formula pre-stored in its local memory.

[0158] like Figure 9 As shown, in any of the above embodiments, the step of determining the filter clogging status based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value specifically includes:

[0159] Step 902: Obtain the static pressure difference value based on the first external static pressure value and the set external static pressure value;

[0160] Step 904: Determine the degree of clogging of the filter screen based on the numerical relationship between the first resistance difference and the static pressure difference.

[0161] In this embodiment, the difference between the first external static pressure value and the set external static pressure value is calculated to obtain the static pressure difference. Since both the first and set external static pressure values ​​correspond to the set airflow of the indoor unit, the first external static pressure value is the external static pressure collected when the indoor unit is running at the set airflow value under the current filter condition, while the set external static pressure value is the external static pressure collected when the indoor unit is running at the set airflow value before the indoor unit leaves the factory, i.e., in the initial filter condition. Therefore, the static pressure difference calculated from the first and set external static pressure values ​​also corresponds to the set airflow value. The calculated static pressure difference accurately reflects the actual clogging status of the filter; therefore, the clogging status of the filter can be accurately determined based on the first resistance difference and the static pressure difference of the filter in its initial state.

[0162] By detecting the filter's clogging status using the first resistance difference of the filter and the static pressure difference of the air conditioner, the system can promptly determine the filter's clogging status during air conditioner operation. Compared to existing technologies, this improves the accuracy and timeliness of filter clogging assessment.

[0163] It is understandable that the static pressure difference outside the unit will vary depending on the airflow of the indoor unit. By establishing a correspondence between the first resistance difference and the operating airflow setting of the indoor unit, the filter clogging can be assessed based on the first external static pressure value corresponding to the set airflow value and the numerical relationship between the set external static pressure value and the first resistance difference. This can improve the accuracy of determining whether the filter is clogged.

[0164] like Figure 10 As shown, in any of the above embodiments, the step of determining the filter screen clogging status based on the numerical relationship between the first resistance difference and the static pressure difference specifically includes:

[0165] Step 1002: Calculate the ratio between the static pressure difference and the first resistance difference to obtain the ratio;

[0166] Step 1004: Determine whether the ratio is greater than the set value. If the result is yes, proceed to step 1006; otherwise, proceed to step 1010.

[0167] Step 1006: The filter is clogged with dirt.

[0168] Step 1008: Output the first prompt message and / or send the second prompt message to the server;

[0169] Step 1010: The filter is not clogged.

[0170] In this embodiment, the first resistance difference is calculated by subtracting the initial resistance value and the final resistance value of the filter. The first resistance difference represents the change in resistance of the filter from an initial clean state to a clogged state. The external static pressure is set as the external static pressure value obtained by detecting the filter in its initial clean state on the indoor unit. The first external static pressure value is the external static pressure value collected during the operation of the indoor unit of the air conditioner; that is, the first external static pressure value is the external static pressure value detected after the filter has been used for a period of time. The static pressure difference and the first resistance difference are compared to obtain a specific ratio, which reflects the degree of filter clogging. A preset value is established by comparing the ratio; when the ratio reaches the preset value, the filter is considered to be in a clogged state, thus realizing the detection of whether the filter is clogged.

[0171] In some embodiments, the degree of clogging of the root filter is set to a value corresponding to different degrees of clogging.

[0172] In these embodiments, the degree of clogging includes "good," "moderate clogging," and "severe clogging." Corresponding set values ​​are set for each clogging degree: "good" corresponds to a value less than a first set value, "moderate clogging" corresponds to a value greater than the first set value, and "severe clogging" corresponds to a value greater than a second set value. The first set value is less than the second set value. When the calculated ratio is less than the first set value, the clogging degree is determined to be "good"; when the calculated ratio is greater than the first set value but less than the second set value, the clogging degree is determined to be "moderate clogging"; and when the calculated ratio is greater than the second set value, the clogging degree is determined to be "severe clogging."

[0173] In some embodiments, the air conditioner further includes a remote control, which has a first display unit and the indoor unit has a second display unit and a speaker.

[0174] When the indoor unit detects that the filter is clogged, it displays a first prompt message via the first and / or second display units on the remote control. This first prompt message includes text and icons, thus informing the user that the filter is clogged. Alternatively, the first prompt message can be output as audio via the speaker in the indoor unit.

[0175] The indoor unit also includes a communication device. When the indoor unit detects that the filter is clogged, it sends a second prompt message to the server via the communication device. The server is the manufacturer's after-sales platform, and the manufacturer can provide corresponding value-added services based on the second prompt message. Users do not need to replace the filter themselves, which further improves the user experience.

[0176] In some embodiments, the indoor unit outputs a first prompt message in audio form through a speaker each time it is turned on, thereby preventing the user from ignoring the first prompt message.

[0177] In some embodiments, the filter clogging level includes "Good," "Moderately Clogged," and "Severely Clogged." Different clogging levels correspond to different initial warning messages, allowing users to more clearly understand the current clogging level of the indoor unit's filter.

[0178] In these embodiments, "Good", "Moderately Clogged" and "Severely Clogged" correspond to different display icons.

[0179] Example 2:

[0180] like Figure 11 As shown, in a second embodiment of the present invention, a filter detection device 1100 for an indoor unit is provided, comprising:

[0181] The acquisition module 1102 is used to acquire the first resistance difference of the filter under a set airflow value;

[0182] The first determining module 1104 is used to determine the first external static pressure value during the operation of the indoor unit;

[0183] The second determining module 1106 is used to determine the clogging status of the filter screen based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value.

[0184] The filter detection device 1100 for the indoor unit provided in this embodiment can detect whether the filter of the indoor unit is clogged. Before the indoor unit starts to exchange heat, the air enters the indoor unit through the return air vent. The filter of the indoor unit is located at the return air vent and is used to filter the air passing through the return air vent, thereby purifying the air.

[0185] The filter has an initial resistance value and a final resistance value. The initial resistance value is the resistance value of the filter after it leaves the factory, that is, the resistance value of the filter in its initial clean state. The final resistance value is the resistance value of the filter when it needs to be cleaned or replaced. The resistance difference can be calculated by subtracting the final resistance value from the initial resistance value. The resistance difference of the filter will be different when the air conditioner is running at different airflow rates. When the indoor unit is running at the set airflow rate, the first resistance difference value corresponding to the set airflow rate is obtained. The first external static pressure value of the indoor unit under the current operating state is determined. The static pressure difference is obtained by subtracting the first external static pressure value from the set external static pressure value. The set external static pressure value is obtained after the air conditioner is installed, that is, the external static pressure value collected when the air conditioner is running with the filter in a brand new state. The first external static pressure value is the external static pressure value of the indoor unit under the current hardware conditions, during operation at the set airflow rate. The set external static pressure value is a pre-stored external static pressure value corresponding to the set airflow value. This set external static pressure value is collected after the air conditioner is installed, meaning the external static pressure value collected when the air conditioner is running with the filter in a brand-new state is the set external static pressure value. Based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value, the degree of filter clogging can be determined.

[0186] It is understandable that as the filter becomes dirty and clogged, the external static pressure value collected during the operation of the air conditioner will change. Therefore, the degree of filter clogging can be determined based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value.

[0187] By detecting the filter's clogging status using the first resistance difference of the filter and the static pressure difference of the air conditioner, the system can promptly determine the filter's clogging status during air conditioner operation. Compared to existing technologies, this improves the accuracy and timeliness of filter clogging assessment.

[0188] It's worth noting that the resistance difference is calculated by subtracting the initial resistance from the final resistance of the filter. This resistance difference represents the change in resistance as the filter transitions from an initially clean state to a clogged state. The first resistance difference is related to the current airflow of the indoor unit, and is determined based on this airflow. The set external static pressure value is the external static pressure value detected by testing the indoor unit with the filter installed in its initially clean state. The first external static pressure value is the external static pressure value collected during the operation of the air conditioner's indoor unit; that is, the first external static pressure value is the external static pressure value detected after the filter has been used for a period of time. Therefore, based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference, it is possible to determine whether the filter is clogged and the degree of clogging.

[0189] It is understandable that the static pressure difference outside the unit will vary depending on the airflow rate of the indoor unit. By establishing a correspondence between the first resistance difference and the operating airflow setting of the indoor unit, and comparing the calculated first static pressure difference outside the unit with the first resistance difference corresponding to the set airflow rate at different airflow rates, the accuracy of determining whether the filter is clogged can be improved.

[0190] In any of the above embodiments, the first determining module 1104 is specifically used to collect the operating current value of the fan in the indoor unit, and obtain the first external static pressure value based on the operating current value and the set air volume value of the indoor unit.

[0191] In this embodiment, the indoor unit also includes a fan. During the constant air volume operation, the fan is energized and runs at a corresponding speed, thereby enabling the air conditioner to output a constant air volume.

[0192] Specifically, the local storage area of ​​the air conditioner stores the corresponding curves of speed and set current. The fan is controlled to run according to the speed and current in the corresponding curve, thereby realizing the control of constant air volume output of the indoor unit of the air conditioner.

[0193] Before the air conditioner leaves the factory, the indoor unit is tested under multiple external static pressure values. During the test, the fan speed is adjusted to ensure the indoor unit outputs the set airflow. The current value of the indoor unit's fan in the current operating mode and the external static pressure value are recorded according to a correspondence, storing this correspondence in the air conditioner's local storage. When the indoor unit is operated at the set airflow value, the fan's operating current value is obtained. By using the operating current value and the set airflow value, and based on the pre-stored correspondence in the air conditioner's local storage, the corresponding first external static pressure value can be determined.

[0194] Before leaving the factory, the correspondence between air volume and current values ​​under various external static pressure values ​​is stored. During the operation of the air conditioner, the first external static pressure value can be quickly determined by collecting the fan's operating current value, which also improves the accuracy of the obtained first external static pressure value.

[0195] In some embodiments, the correspondence between air volume, fan current, and external static pressure is stored in a table format in the local storage area of ​​the air conditioner.

[0196] In these embodiments, during the operation of the air conditioner, the corresponding external static pressure value is found by looking up a table based on the operating current value and the set air volume value.

[0197] In other embodiments, the correspondence between the air volume value, the fan current value, and the external static pressure value is stored in the local storage area of ​​the air conditioner in the form of a function.

[0198] In these embodiments, during the operation of the air conditioner, the operating current value and the set air volume value are calculated by a function to obtain the external static pressure value.

[0199] In any of the above embodiments, the first determining module 1104 is specifically used to search for the first correspondence between the current value and the external static pressure value by setting the air volume value, find the second external static pressure value through the first correspondence based on the operating current value, obtain the static pressure correction value, and calculate the difference between the second external static pressure value and the static pressure correction value to obtain the first external static pressure value.

[0200] In this embodiment, the indoor unit can operate at different airflow values. In determining the first external static pressure value, a lookup table is used to find the first correspondence between the external static pressure value and the current value based on the set airflow value. Then, the corresponding second external static pressure value is found based on the fan's operating current value and the first correspondence. Not only is the filter resistance included in the second external static pressure value, but other structural components in the indoor unit also exert resistance to the airflow, which is also included in the second external static pressure value. Therefore, after obtaining the second external static pressure value, it is corrected and calculated based on the static pressure correction value to obtain the first external static pressure value corresponding to the set airflow value.

[0201] In the process of determining the first external static pressure value corresponding to the set air volume value, the present invention corrects the second external static pressure value obtained by searching through the static pressure correction value, so that the obtained first static pressure value is only affected by the resistance value of the filter screen, thereby ensuring that the obtained external static pressure difference can reflect the actual dirt and clogging of the filter screen.

[0202] In any of the above embodiments, the first determining module 1104 is specifically used to obtain the tilt angle of the air guide strip, determine the second correspondence between the tilt angle and the correction value, and obtain the corresponding static pressure correction value based on the tilt angle through the second correspondence.

[0203] In this embodiment, the air guide strip also creates resistance to the airflow from the indoor unit, thus affecting the judgment of the outdoor static pressure value of the indoor unit. Different angles of the air guide strip result in different resistances to the airflow from the indoor unit. Before the indoor unit leaves the factory, the resistance value generated by the air guide strip and the tilt angle of the air guide strip are stored according to a corresponding relationship. The resistance generated by the air guide strip to the airflow from the indoor unit is the static pressure correction value. Based on the tilt angle of the air guide strip of the indoor unit, the corresponding resistance generated by the sealing strip to the airflow from the indoor unit, i.e., the static pressure correction value, can be found through a second correspondence. To eliminate the influence of the air guide strip on the outdoor static pressure value, this invention uses the resistance value generated by the air guide strip to the airflow from the indoor unit as the static pressure correction value. By calculating the second outdoor static pressure value and the static pressure correction value, the obtained first static pressure value is only affected by the resistance value of the filter, allowing the outdoor static pressure difference to accurately reflect the actual dirt and clogging of the filter.

[0204] In some embodiments, the tilt angle of the air guide vane is determined by collecting the rotation angle of the drive motor.

[0205] In other embodiments, a sensor is installed on the air guide vane or on the output shaft of the drive motor. The sensor is connected to the processor of the indoor unit and can directly collect the tilt angle of the air guide vane.

[0206] In any of the above embodiments, the filter detection device 1100 of the indoor unit includes:

[0207] The timing module 1108 is used to collect the current air volume value during the operation of the fan, find the corresponding air volume threshold range according to the set air volume value, and determine the duration for which the current air volume value remains within the air volume threshold range.

[0208] In this embodiment, before collecting the operating current value, it is necessary to determine that the airflow output by the fan has reached a set value and remains stable. An airflow threshold range is obtained by adding or subtracting the set airflow value. If the airflow output by the fan falls within this threshold range, it can be determined that the fan is operating at the set airflow value. The duration for which the current airflow value remains within the threshold range is timed; if the duration reaches a set time, it is determined that the fan is in a stable airflow output state. This invention, by determining whether the fan has reached a constant set airflow output value before collecting the operating current value, achieves the collection of the operating current value corresponding to the set airflow value. By timing the duration for which the current airflow value remains within the threshold range until the set time is reached, and then collecting the operating current value, it is further ensured that the collected operating current value is the current value when the fan is operating in a constant airflow state, improving the accuracy of the subsequent external static pressure value obtained from the operating current value.

[0209] In any of the above embodiments, the acquisition module 1102 is specifically used to determine the third correspondence between the air volume value and the filter resistance difference, and according to the third correspondence, to find the corresponding first resistance difference by setting two separate values.

[0210] In this embodiment, the resistance generated by the filter to the airflow from the indoor unit is a hardware characteristic of the filter itself, meaning the initial resistance value of the filter is fixed. Before the filter leaves the factory, its durability is tested to determine the filter's final resistance value. When the filter reaches its final resistance value, it is recommended that the user replace the filter.

[0211] Because the airflow output of the indoor unit varies, the filter resistance value also affects the airflow output of the indoor unit differently. Before the air conditioner leaves the factory, the indoor unit is simulated to operate at various airflow values, and the final resistance value of the filter is collected under each airflow value. This allows for the calculation of the first resistance difference of the filter corresponding to each airflow value. The first resistance difference is then stored in relation to each airflow value according to a third correspondence relationship. After the air conditioner is installed, the set airflow value for constant output during indoor unit operation is determined, and the first resistance difference corresponding to the set airflow value is looked up according to the third correspondence relationship.

[0212] In any of the above embodiments, the acquisition module 1102 is specifically used to acquire the second resistance difference value of the filter and the rated air volume value of the indoor unit, and to calculate the first resistance difference value based on the rated air volume value, the set air volume value, and the second resistance difference value.

[0213] In this embodiment, the resistance generated by the filter to the airflow from the indoor unit is a hardware characteristic of the filter itself, meaning the initial resistance value of the filter is fixed. Before the filter leaves the factory, its durability is tested to determine its final resistance value. When the filter reaches its final resistance value, it is recommended that the user replace the filter. The difference between the initial resistance value and the final resistance value is calculated to obtain a second resistance difference value.

[0214] Because the airflow output by the indoor units varies, the filter resistance value also has different effects on the airflow from the indoor unit. Before leaving the factory, the indoor unit has a pre-stored formula in its local storage area for calculating the first resistance difference based on the second resistance difference. The specific formula is as follows:

[0215] D1=A×D2×(A Fn / A F0 )^2;

[0216] Where D1 is the first resistance difference, D2 is the second resistance difference, and A is a coefficient. F0 A is the rated air volume value. Fn To set the airflow value.

[0217] This invention substitutes the obtained set airflow value, the rated airflow value stored in the local storage area, and the second resistance difference value into the above formula to calculate the first resistance difference value, where the coefficient A ranges from 0.8 to 1.2. The first resistance difference value calculated by the above formula is the resistance difference value of the filter corresponding to the set airflow value. This improves the accuracy of subsequent calculations based on the first resistance difference value, thereby improving the accuracy of judging the filter clogging condition and reducing the possibility of misjudgment.

[0218] In any of the above embodiments, the acquisition module 1102 is further configured to acquire a first set resistance value and a second set resistance value of the filter, and calculate the difference between the first set resistance value and the second set resistance value to obtain a second resistance difference value.

[0219] In this embodiment, the first resistance value of the filter is its initial resistance value, and the resistance generated by the filter against the airflow is a hardware characteristic of the filter itself. The second set resistance value is the final resistance value of the filter, which is obtained by testing the filter's durability. The difference between the initial resistance value and the final resistance value is calculated to obtain the second resistance difference value. This second resistance difference value is a hardware attribute of the filter itself.

[0220] Understandably, since the second resistance difference is a hardware attribute value of the filter, it is directly marked on the filter or recorded on its packaging. After the user replaces the filter, the second resistance difference is input into the indoor unit of the air conditioner via the controller. The indoor unit can then calculate the first resistance difference based on a formula pre-stored in its local memory.

[0221] In any of the above embodiments, the second determining module 1106 is specifically used to obtain a static pressure difference value based on the first external static pressure value and the set external static pressure value; and to determine the clogging status of the filter screen based on the numerical relationship between the first resistance difference value and the static pressure difference value.

[0222] In this embodiment, the difference between the first external static pressure value and the set external static pressure value is calculated to obtain the static pressure difference. Since both the first and set external static pressure values ​​correspond to the set airflow of the indoor unit, the first external static pressure value is the external static pressure collected when the indoor unit is running at the set airflow value under the current filter condition, while the set external static pressure value is the external static pressure collected when the indoor unit is running at the set airflow value before the indoor unit leaves the factory, i.e., in the initial filter condition. Therefore, the static pressure difference calculated from the first and set external static pressure values ​​also corresponds to the set airflow value. The calculated static pressure difference accurately reflects the actual clogging status of the filter; therefore, the clogging status of the filter can be accurately determined based on the first resistance difference and the static pressure difference of the filter in its initial state.

[0223] It is understandable that the static pressure difference outside the unit will vary depending on the airflow of the indoor unit. By establishing a correspondence between the first resistance difference and the operating airflow setting of the indoor unit, the filter clogging can be assessed based on the first external static pressure value corresponding to the set airflow value and the numerical relationship between the set external static pressure value and the first resistance difference. This can improve the accuracy of determining whether the filter is clogged.

[0224] In any of the above embodiments, the second determining module 1106 is specifically used to calculate the ratio of the static pressure difference and the first resistance difference, obtain the ratio, and determine whether the ratio is greater than a set value, and whether the filter is in a dirty and clogged state.

[0225] In this embodiment, the first resistance difference is calculated by subtracting the initial resistance value and the final resistance value of the filter. The first resistance difference represents the change in resistance of the filter from an initial clean state to a clogged state. The external static pressure is set as the external static pressure value obtained by detecting the filter in its initial clean state on the indoor unit. The first external static pressure value is the external static pressure value collected during the operation of the indoor unit of the air conditioner; that is, the first external static pressure value is the external static pressure value detected after the filter has been used for a period of time. The static pressure difference and the first resistance difference are compared to obtain a specific ratio, which reflects the degree of filter clogging. A preset value is established by comparing the ratio; when the ratio reaches the preset value, the filter is considered to be in a clogged state, thus realizing the detection of whether the filter is clogged.

[0226] In any of the above embodiments, the filter detection device 1100 of the indoor unit further includes:

[0227] The prompt module 1110 is used to output a first prompt message and / or send a second prompt message to the server when the filter is clogged.

[0228] In this embodiment, the air conditioner also includes a remote control, which has a first display unit, and the indoor unit has a second display unit and a speaker.

[0229] When the indoor unit detects that the filter is clogged, it displays a first prompt message via the first and / or second display units on the remote control. This first prompt message includes text and icons, thus informing the user that the filter is clogged. Alternatively, the first prompt message can be output as audio via the speaker in the indoor unit.

[0230] The indoor unit also includes a communication device. When the indoor unit detects that the filter is clogged, it sends a second prompt message to the server via the communication device. The server is the manufacturer's after-sales platform, and the manufacturer can provide corresponding value-added services based on the second prompt message. Users do not need to replace the filter themselves, which further improves the user experience.

[0231] In some embodiments, the indoor unit outputs a first prompt message in audio form through a speaker each time it is turned on, thereby preventing the user from ignoring the first prompt message.

[0232] In some embodiments, the filter clogging level includes "Good," "Moderately Clogged," and "Severely Clogged." Different clogging levels correspond to different initial warning messages, allowing users to more clearly understand the current clogging level of the indoor unit's filter.

[0233] Example 3:

[0234] like Figure 12 As shown, the first embodiment of the present invention provides an indoor unit 1200, including: a housing, a filter screen disposed in an air duct, a memory 1202, and a processor 1204.

[0235] The casing has an air duct, and the filter is disposed within the air duct. The memory 1202 stores a program or instructions. The processor 1204 executes the program or instructions stored in the memory 1202 to implement the steps of the filter detection method for the indoor unit as described in Embodiment 1 above. Therefore, it possesses all the beneficial effects of the filter detection method for the indoor unit as described in Embodiment 1 above, which will not be elaborated further here.

[0236] The indoor unit 1200 provided by this invention includes a casing and a filter, with an air duct formed inside the casing. The indoor unit also includes a return air vent, through which air before heat exchange enters the air duct during operation of the indoor unit 1200. The filter is disposed inside the air duct and filters the air flowing through the air duct, thereby purifying the air.

[0237] In any of the above embodiments, the indoor unit 1200 further includes an air guide vane and a drive motor.

[0238] The air guide strip is located at the air outlet of the air duct. The output end of the drive motor is connected to the air guide strip, and the drive motor is used to drive the air guide strip to adjust its tilt angle.

[0239] In this embodiment, the indoor unit 1200 also includes an air guide vane and a drive motor. The air guide vane is located at the air outlet of the air duct, outside the filter. During operation, the air discharged from the indoor unit 1200, after being filtered by the filter, passes through the air guide vane, changing the airflow direction of the indoor unit 1200. The drive motor is connected to the air conditioner's controller, allowing the user to control the motor's movement via the controller, thereby rotating the air guide vane to a specified angle and adjusting the airflow direction of the air conditioner.

[0240] In any of the above embodiments, the indoor unit 1200 further includes a display device and / or a communication device.

[0241] The display device is connected to the processor 1204 and is used to output the first prompt information.

[0242] The communication device is connected to the processor 1204 and is used to send a second prompt message to the server.

[0243] In this design, the indoor unit 1200 also includes a display device and / or a communication device. The display device and / or communication device are connected to the processor 1204 of the indoor unit 1200. When the filter of the indoor unit 1200 is detected to be clogged, the display device can display and output a first prompt message, which informs the user that the filter is currently clogged and needs to be replaced or cleaned. The communication device can send a second prompt message to the server. The manufacturer can read the second prompt message from the server and provide corresponding value-added services based on the second prompt message, eliminating the need for the user to replace the filter themselves and improving the user experience.

[0244] In some embodiments, the air conditioner also includes a remote control, which has a first display unit and the indoor unit 1200 has a second display unit and a speaker.

[0245] When the indoor unit 1200 detects that the filter is clogged, it displays a first prompt message via the first and / or second display units on the remote control. The first prompt message includes text and icon information, thus informing the user that the filter is clogged. The first prompt message can also be output as audio via the speaker in the indoor unit 1200.

[0246] In some embodiments, the indoor unit 1200 outputs a first prompt message in audio form through a speaker each time it is turned on, thereby preventing the user from ignoring the first prompt message.

[0247] In some embodiments, the filter clogging level includes "Good", "Moderately Clogged", and "Severely Clogged". Different clogging levels correspond to different initial warning messages, allowing users to more clearly understand the current clogging level of the indoor unit 1200's filter.

[0248] Example 4:

[0249] like Figure 13 As shown, the first embodiment of the present invention provides an air conditioner 1300, including an indoor unit 1200 and an outdoor unit 1302.

[0250] The outdoor unit 1302 is connected to the indoor unit 1200. The outdoor unit 1302 is also equipped with a compressor. The compressor can compress the refrigerant in the refrigerant pipeline. The compressed refrigerant flows through the refrigerant pipeline to the indoor unit 1200 and the outdoor unit 1302, thereby realizing the cooling and heating functions of the air conditioner 1300.

[0251] The indoor unit 1200 is selected as the indoor unit 1200 in Embodiment 3, and therefore has all the beneficial effects of the indoor unit 1200 in Embodiment 3, which will not be elaborated further here.

[0252] Example 5:

[0253] In a fifth embodiment of the present invention, a readable storage medium is provided, on which a program is stored. When the program is executed by a processor, it implements the filter detection method of the indoor unit as described in any of the above embodiments, and thus has all the beneficial technical effects of the filter detection method of the indoor unit in any of the above embodiments.

[0254] Among them, readable storage media include read-only memory (ROM), random access memory (RAM), magnetic disks, or optical disks.

[0255] It should be clarified that in the claims, description, and accompanying drawings of this invention, the term "plural" refers to two or more objects. Unless otherwise explicitly defined, the terms "upper," "lower," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the invention and simplifying the description process, not to indicate or imply that the device or element referred to must have the described specific orientation, or be constructed and operated in a specific orientation. Therefore, these descriptions should not be construed as limitations on the invention. The terms "connection," "installation," "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection between multiple objects, a detachable connection between multiple objects, or an integral connection; it can be a direct connection between multiple objects or an indirect connection between multiple objects through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in this invention can be understood based on the specific circumstances of the above data.

[0256] In the claims, description, and accompanying drawings of this invention, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of the invention. In the claims, description, and accompanying drawings of this invention, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0257] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Various modifications and variations can be made to the present invention by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A method for detecting the filter of an indoor unit, characterized in that, The indoor unit includes a filter, the indoor unit also includes a fan, the indoor unit includes an air guide strip, the air guide strip is disposed at the air outlet of the indoor unit, and the filter detection method includes: The first resistance difference value of the filter screen under a set air volume value is obtained. The first resistance difference value is the resistance change value of the filter screen from the initial clean state to the dirty and clogged state. Determine the first external static pressure value during the operation of the indoor unit; The degree of clogging of the filter screen is determined based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value. The step of determining the clogging status of the filter screen based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value specifically includes: The static pressure difference is obtained based on the first external static pressure value and the set external static pressure value; The degree of clogging of the filter screen is determined based on the numerical relationship between the first resistance difference and the static pressure difference. The first resistance difference is related to the current operating air volume of the indoor unit, and the first resistance difference of the filter is determined based on the operating air volume of the indoor unit. The step of determining the first external static pressure value during the operation of the indoor unit specifically includes: Collect the operating current value of the fan; The first external static pressure value is determined based on the set air volume value and the operating current value. The step of determining the first external static pressure value based on the set air volume value and the operating current value specifically includes: Based on the set air volume value, find the first correspondence between the current value and the external static pressure value; The second external static pressure value is determined based on the operating current value and the first correspondence. Obtain the static pressure correction value, and calculate the first external static pressure value based on the second external static pressure value and the static pressure correction value; The first external static pressure value is only affected by the resistance value of the filter screen; The step of obtaining the static pressure correction value specifically includes: The tilt angle of the air guide vane is collected; Obtain the second correspondence between the tilt angle and the correction value, and find the static pressure correction value based on the tilt angle and the second correspondence.

2. The filter detection method for an indoor unit according to claim 1, characterized in that, Before the step of collecting the operating current value of the wind turbine, the method further includes: Collect the current air volume value output by the fan; Based on the set air volume value, determine the air volume threshold range, and determine the time for which the current air volume value is within the air volume threshold range.

3. The filter detection method for an indoor unit according to claim 1 or 2, characterized in that, The step of obtaining the first resistance difference value of the filter screen under a set airflow value specifically includes: Obtain the third correspondence between airflow value and filter resistance difference; Based on the set air volume value and the third correspondence, find the first resistance difference value.

4. The filter detection method for an indoor unit according to claim 1 or 2, characterized in that, The step of obtaining the first resistance difference value of the filter screen under a set airflow value specifically includes: Obtain the second resistance difference value of the filter screen; Obtain the rated air volume value of the indoor unit; The first resistance difference is calculated based on the rated air volume value, the set air volume value, and the second resistance difference value.

5. The filter detection method for an indoor unit according to claim 4, characterized in that, The step of obtaining the second resistance difference value of the filter screen specifically includes: Obtain the first set resistance value and the second set resistance value of the filter screen; The second resistance difference is calculated based on the first set resistance value and the second set resistance value.

6. The method for detecting the filter of an indoor unit according to claim 1 or 2, characterized in that, The step of determining the clogging status of the filter screen based on the numerical relationship between the first resistance difference and the static pressure difference specifically includes: Calculate the ratio of the static pressure difference to the first resistance difference; If the ratio is greater than a set value, it is determined that the filter is clogged.

7. The filter detection method for an indoor unit according to claim 6, characterized in that, Also includes: Based on the fact that the filter is in the state of being clogged, a first prompt message is output, and / or a second prompt message is sent to the server.

8. A filter detection device for an indoor unit, characterized in that, The indoor unit includes a filter, the indoor unit also includes a fan, the indoor unit includes an air guide strip, the air guide strip is disposed at the air outlet of the indoor unit, and the filter detection device includes: The acquisition module is used to acquire the first resistance difference value of the filter screen under a set air volume value. The first resistance difference value is the resistance change value of the filter screen from the initial clean state to the dirty and clogged state. The first determining module is used to determine the first external static pressure value during the operation of the indoor unit; The second determining module is used to determine the clogging status of the filter screen based on the numerical relationship between the first external static pressure value, the set external static pressure value, and the first resistance difference value. The second determining module is specifically used to obtain the static pressure difference value based on the first external static pressure value and the set external static pressure value; The degree of clogging of the filter screen is determined based on the numerical relationship between the first resistance difference and the static pressure difference. The first resistance difference is related to the current operating air volume of the indoor unit, and the first resistance difference of the filter is determined based on the operating air volume of the indoor unit. The first determining module is specifically used to collect the operating current value of the fan in the indoor unit, and obtain the first external static pressure value based on the operating current value and the set air volume value of the indoor unit. The first determining module is specifically used to look up the first correspondence between the current value and the external static pressure value through the set air volume value, find the second external static pressure value through the first correspondence based on the operating current value, obtain the static pressure correction value, and calculate the difference between the second external static pressure value and the static pressure correction value to obtain the first external static pressure value. The first external static pressure value is only affected by the resistance value of the filter screen; The first determining module is specifically used to obtain the tilt angle of the air guide strip, determine the second correspondence between the tilt angle and the correction value, and find the corresponding static pressure correction value based on the tilt angle through the second correspondence.

9. An indoor unit, characterized in that, include: The housing has an air duct formed therein; The filter screen installed in the air duct; A memory that stores programs or instructions; A processor that executes a program or instructions stored in the memory to implement the steps of the filter detection method for an indoor unit as described in any one of claims 1 to 7.

10. The indoor unit according to claim 9, characterized in that, Also includes: Air guide strips are installed at the air outlet of the air duct; A drive motor, the output end of which is connected to the air guide strip, is used to drive the air guide strip to adjust its tilt angle.

11. An air conditioner, characterized in that, include: The indoor unit as described in claim 9 or 10 above; The outdoor unit is connected to the indoor unit.

12. A readable storage medium, characterized in that, The readable storage medium stores a program or instructions that, when executed by a processor, implement the steps of the filter detection method for an indoor unit as described in any one of claims 1 to 7.

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